U.S. patent application number 10/589146 was filed with the patent office on 2008-01-24 for spring-turning apparatus.
This patent application is currently assigned to REMEX AG. Invention is credited to Kaspar Haltiner.
Application Number | 20080017271 10/589146 |
Document ID | / |
Family ID | 34842443 |
Filed Date | 2008-01-24 |
United States Patent
Application |
20080017271 |
Kind Code |
A1 |
Haltiner; Kaspar |
January 24, 2008 |
Spring-Turning Apparatus
Abstract
A spring apparatus turns a spring to be in a position suitable
for delivery to a spring-transporting apparatus. The spring
apparatus has a cassette wheel which can be rotated about an axis
and has at least one cassette compartment for holding the spring in
a first rotational position. Furthermore, there is a transfer
element for delivering the spring to the spring-transporting
apparatus in a second rotational position.
Inventors: |
Haltiner; Kaspar;
(Eggersriet, CH) |
Correspondence
Address: |
THE WEBB LAW FIRM, P.C.
700 KOPPERS BUILDING, 436 SEVENTH AVENUE
PITTSBURGH
PA
15219
US
|
Assignee: |
REMEX AG
STEINACH SWITZERLAND
CH
|
Family ID: |
34842443 |
Appl. No.: |
10/589146 |
Filed: |
February 11, 2005 |
PCT Filed: |
February 11, 2005 |
PCT NO: |
PCT/CH05/00078 |
371 Date: |
March 15, 2007 |
Current U.S.
Class: |
140/103 ;
198/347.1; 198/418 |
Current CPC
Class: |
B21F 33/04 20130101 |
Class at
Publication: |
140/103 ;
198/347.1; 198/418 |
International
Class: |
B21F 33/04 20060101
B21F033/04 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 13, 2004 |
CH |
229/04 |
Claims
1-19. (canceled)
20. A spring-turning apparatus for turning a spring into a position
suitable for delivery to a spring-transporting apparatus, wherein
the spring-turning apparatus comprises: a cassette wheel configured
to be rotated about an axis, wherein the cassette wheel has at
least one cassette compartment for holding the spring in a first
rotational position; and at least one first transfer element for
delivering the spring to the spring-transporting apparatus in a
second rotational position.
21. The spring-turning apparatus according to claim 20, wherein the
cassette wheel includes four cassette compartments, wherein the
cassette wheel is configured to rotate and cause the at least one
cassette compartment to move into the second rotational position
having a 90.degree. angle of rotation with respect to the first
rotational position.
22. The spring-turning apparatus according to claim 21, wherein
each cassette compartment includes a first transfer element.
23. The spring-turning apparatus according to claim 22, wherein the
first transfer element includes a pivotally mounted sliding
arm.
24. The spring-tuning apparatus according to claim 23, wherein the
pivoting arm includes a recess for holding the spring.
25. The spring-turning apparatus according to claim 20, wherein the
at least one cassette compartment includes two opposite walls
adapted to hold the spring therebetween.
26. The spring-turning apparatus according to claim 20, further
comprising rotary plates adapted to hold the spring
therebetween.
27. The spring-turning apparatus according to claim 20, further
comprising a transfer unit, wherein the transfer unit includes two
mutually opposite clamping plates for holding the spring by
clamping thereof, and further including a second transfer element
for delivering the spring from the transfer unit into the cassette
wheel.
28. The spring-turning apparatus according to claim 26, wherein one
of the respective rotary plates is arranged in each one of the
respective clamping plates.
29. The spring-turning apparatus according to claim 27, wherein one
of the respective rotary plates is arranged in each one of the
respective clamping plates.
30. The spring-turning apparatus according to claim 27, wherein the
transfer unit is pivotally arranged.
31. A method for forming rows of springs, the method comprising the
steps of: supplying the springs individually and delivering the
springs at a lower delivery point to a spring conveyor; and
changing the relative position of the lower delivery point with
respect to the spring conveyor.
32. The method according to claim 31, further comprising the steps
of: delivering the springs individually to a transfer conveyor at
an upper delivery point, wherein the upper delivery point remains
constant in its relative position with respect to the spring
conveyor; conveying springs situated on the transfer conveyor to
the lower delivery point; and delivering the springs at the lower
delivery point to the spring conveyor.
33. The method according to claim 31, wherein the spring conveyor
is operated in one of a constant cycle and at a constant speed.
34. A spring-transporting apparatus comprising a spring conveyor
and a device for transferring springs to the spring conveyor,
wherein the device is configured to transfer individually supplied
springs in a lower delivery point to the spring conveyor in such a
manner that the springs are arranged in a row and arranged one
behind another and at selectable distances from one another on the
spring conveyor, and wherein the relative position of the lower
delivery point with respect to the spring conveyor is
changeable.
35. The apparatus according to claim 34, further comprising: a
transfer conveyor at least partially situated parallel and adjacent
to the spring conveyor; a first delivery means situated at an upper
delivery point for delivering the springs to the transfer conveyor;
and a second delivery means for delivering the springs from the
transfer conveyor to the spring conveyor, wherein the second
delivery means are movable to the lower delivery position.
36. The apparatus according to claim 35, wherein the first delivery
means delivers the springs at an upper delivery point that remains
constant relative to the spring conveyor.
37. The apparatus according to claim 35, wherein the first and
second delivery means deliver the springs individually.
38. The apparatus according to claim 34, wherein the spring
conveyor is operated by a servomotor.
39. The apparatus according to claim 35, wherein the transfer
conveyor is operated by a servomotor.
40. The apparatus according to claim 35, wherein one of the spring
conveyor and the transfer conveyor includes two respective
revolving belt conveyors situated parallel to each other and
adapted to clamp the individual springs therebetween.
Description
TECHNICAL FIELD
[0001] The invention relates to a spring-turning apparatus
according to the precharacterizing clause of Patent claim 1. It
furthermore relates to a method for forming rows of springs
according to the precharacterizing clause of Patent claim 11 and to
a spring-transporting apparatus according to the precharacterizing
clause of Patent claim 14.
PRIOR ART
[0002] During the production of spring cores for mattresses,
paddings or seat cushions, springs are coiled in a spring-coiling
machine, are delivered via a spring-turning station to a
spring-transporting apparatus and are supplied by the latter to a
processing or assembly station where the individual springs are
connected to one another. The spring-turning station carries out
the task here of delivering the individually finished springs to
the transporting apparatus in a manner such that they are oriented
in a manner suitable for processing and such that they are
precisely positioned.
[0003] EP-A-0,774,309 discloses a spring-turning apparatus in which
the coiling machine delivers the springs in a holding position
individually to arms of a multiarmed transporter, the transporting
star is rotated in a constant cycle into a delivery position and
each spring is placed individually between two revolving continuous
loops. The two continuous loops have a vertically running section
which merges into a horizontally running section. A
spring-transporting conveyor comprising an upper and a lower
horizontally running belt conveyor is adjacent to this horizontally
running section. The said belt conveyor takes over the spring and
supplies it to the processing station. The rotation of the belts
that arises in the process has the disadvantage that springs may be
displaced. In addition, the springs cannot be delivered in any
desired rotational position but rather all have the same direction
of rotation.
[0004] WO 2004/011173 discloses a device for orienting springs
while being transported from a spring-coiling machine to a spring
core mounting machine which comprises a rotating table for the
springs.
[0005] DE-A-199,50,401 discloses a device for rotating the springs
which consists of a pivotal centre having three arms.
[0006] WO 02/38304 discloses a rotatable wheel with receiving
pockets, in which the springs are passed on to the conveyor belt in
a lying manner.
[0007] Furthermore, it is mentioned in EP-A-0,774,309 that the two
continuous loops which hold the springs under compression are
driven synchronously with each other by means of a servodrive. It
should thus be possible to operate different strokes and therefore
to individually select the distances between the individual springs
and spring groups. This apparatus has the disadvantage that the
entire belt and therefore all of the spring groups situated on the
belt always have to be driven with a relatively large or relatively
small stroke. The forces acting on the springs may thus lead to a
displacement of the springs as the compression of the belts
decreases. In addition, the system is more susceptible to
breakdowns, since the constant stroke change is relatively
difficult to bring about.
SUMMARY OF THE INVENTION
[0008] It is therefore an object of the invention to provide a
spring-turning apparatus which ensures that the springs are
securely transported and which permits a greater flexibility in the
positioning of the springs.
[0009] This object is achieved by a spring-turning apparatus having
the features of Patent claim 1.
[0010] The spring-turning apparatus according to the invention has
a cassette wheel which can be rotated about an axis and has at
least one cassette compartment. In a first rotational position of
the cassette wheel, a spring can be introduced into the at least
one cassette compartment. In a second rotational position, the
spring can be delivered to a spring-transporting apparatus, there
being a transfer element for the delivery.
[0011] There are preferably a plurality of cassette compartments,
so that, in each case simultaneously, a first cassette compartment
is situated in the first position and a second cassette compartment
in the second position. As a result, the transfer process can take
place without any time delay.
[0012] The spring-turning apparatus preferably has rotary plates
between which a spring can be held in each case. As a result, each
spring can be rotated individually into its desired rotational
position before it is delivered to the spring-transporting
apparatus. Thus, for example, each spring can be rotated
individually through a desired angle. This enables rows of springs
to be formed, the outer springs of which are always oriented in
such a manner that their free ends are directed towards the
adjacent rows and therefore cannot protrude outwards. This
orientation prevents free ends of the springs from being able to
damage the cushion or padding covers.
[0013] It is possible to arrange these rotary plates in the
cassette compartments. However, in a preferred embodiment, these
rotary plates are situated in a transfer unit which is arranged
between a multiarmed transporting star and the cassette wheel. This
transfer unit is preferably arranged pivotably, so that it can
bridge the distance between the transporting star and cassette
wheel during the delivery of the springs.
[0014] It is furthermore advantageous that the springs can be
positioned in a relatively precise manner in the rotary cassette,
thus enabling the delivery to the spring-transporting apparatus to
take place with the same precision. A further advantage is that the
cassette requires a relatively small amount of space and the size
of the system is therefore minimized.
[0015] It is a further object of the invention to provide a method
and an apparatus which facilitate the formation of rows of springs
in any desired positions and minimize the susceptibility of the
system to breakdowns.
[0016] This object is achieved by the method and the apparatus
having the features of Patent claims 11 and 14, respectively.
[0017] In the case of the method according to the invention for
forming rows of springs and in the case of the spring-transporting
apparatus according to the invention, the springs are supplied
individually and are delivered at a lower delivery point to a
spring conveyor, the relative position of this lower delivery point
with respect to the spring conveyor being changed.
[0018] This changing of the position preferably takes place by
means of an intermediate or transfer conveyor which, in the
delivery region, runs parallel and adjacent to the spring conveyor.
As a result, individual springs can be delivered to this transfer
conveyor and brought to the desired lower delivery point without
the conveying speed or the cycle of the spring conveyor, on which
the springs which are already arranged in rows are situated, having
to be interrupted. Since the transfer conveyor can be of relatively
short design, the forces which act on its mechanism are
significantly smaller.
[0019] In addition, this type of transfer makes it possible for the
springs to be able to be positioned relatively precisely on the
transfer conveyor. This precision is taken on by the spring
conveyor, so that a later orientation of the springs shortly before
or during their delivery to a processing or assembly station can be
omitted.
[0020] Further advantageous variants of the invention and further
advantageous embodiments emerge from the dependent patent
claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The subject matter of the invention is explained below with
reference to a preferred exemplary embodiment which is illustrated
schematically in the attached drawings, in which:
[0022] FIG. 1 shows a view from above of the turning apparatus
according to the invention and of the units adjoining it;
[0023] FIG. 2 shows a perspective view of the turning apparatus
according to FIG. 1 including the spring-transporting
apparatus;
[0024] FIG. 3a shows a side view of the transfer unit according to
FIG. 2 in a depositing position;
[0025] FIG. 3b shows the transfer unit according to FIG. 3a in a
delivery position;
[0026] FIG. 4 shows the elements according to FIG. 1 from the side,
and
[0027] FIGS. 5a to 5f show schematic illustrations of the delivery
of spring to the transporting device in six steps.
WAYS OF IMPLEMENTING THE INVENTION
[0028] FIG. 1 illustrates a turning apparatus according to the
invention. Springs F which are supplied by a spring-coiling machine
(not illustrated) are grasped individually by a transporting star
1. For this purpose, the transporting star 1 has a plurality of
gripping arms 10, only one of these gripping arms 10 being
illustrated in FIG. 1. At its free end, the gripping arm 10 has a
clip 11 in which the spring F can be held in a fixed manner.
[0029] The transporting star 1 rotates about its axis, as a result
of which the springs F, which are held individually, pass through
finishing stations. For example, an end ring is bent towards them
in a first rotational position or the spring is bound together, and
in a second rotational position they are hardened, for example.
[0030] In a last rotational position, the gripping arm 10 delivers
the spring F to a transfer unit 2. This transfer unit 2 is mounted
pivotably and pushes the spring F into a cassette compartment 30 of
a cassette wheel 3. Rotation of the cassette wheel 3 about a
central axis 31 causes the spring F to be rotated from its previous
horizontal, lying orientation into a vertical, standing orientation
and to be brought to a spring-transporting apparatus T. A transfer
element or delivery means 32 pushes the spring F, which is now
standing, into the spring-transporting apparatus T from where it is
conveyed into the processing and assembly station (not illustrated
in the figures).
[0031] The spring-transporting apparatus T is explained once again
in more detail later on in the text with reference to FIGS. 1 and
4. In the following text, the turning apparatus according to the
invention is discussed first.
[0032] In FIG. 2, the transfer unit 2 and the cassette wheel 3 can
be readily seen. The transfer unit 2 has two mutually opposite
clamping plates 20. They are preferably arranged at an angle to
each other at least in their region directed towards the direction
of movement of the transporting star 1, so that they form an
opening which slightly expands in this direction. In this
embodiment, the opening is directed downwards. Rotary plates 21,
the surfaces of which are aligned with the inner surface of the
clamping plates 20, are embedded in the clamping plates 20. The
transfer unit 2 furthermore has at least one, preferably two,
transfer elements in the form of pivoting flags 22. Each pivoting
flag 22 has a pivotable arm 220 and a sliding plate 221, which is
arranged on it and is slit in a V-shaped manner. The shape of the
sliding plate 221 can be adapted or selected in accordance with the
shape of the springs F.
[0033] FIGS. 3a and 3b illustrate the two extreme positions of the
transfer unit 2. These can also be seen in FIG. 2, the movement of
the transfer unit 2 being indicated here by an arrow and the second
extreme position only being illustrated by chain-dotted lines.
[0034] In the position according to FIG. 3a, the said transfer unit
is situated in the rear position remote from the cassette wheel 3.
In this position, the spring F is delivered to the transfer unit 2
by rotation of the transporting star 1. In FIG. 3a, the front end
of the gripping arm 10 can be seen. The arrow shows the direction
of movement of the gripping arm 10 and the spring F, which is
illustrated by dashed lines, or the gripping arm 10, which is
illustrated by dashed lines, shows the position at which the spring
F is released by the clip 11 and is clamped between the two
clamping plates 20 or between the two rotary plates 21. In this
position, the spring F is slightly pressed together and is
therefore held resiliently.
[0035] The transfer unit 2 is now pivoted about its axis 23 towards
the cassette wheel 3. At the same time, the spring F can be brought
by means of rotation of the rotary plates 21 via servomotors into
any desired rotational position. This rotation does not have to
take place during each transfer of a spring F; rather, it depends
on the type and ensuing position of the spring in the finished
padding. For example, each spring which, in the finished padding,
comes to rest at one end of a row can be rotated in such a manner
that its free end is directed towards the row. The rotary plates,
and also all of the other elements, described previously and below,
of the transporting star, of the turning apparatus and of the
spring conveyor are driven and controlled preferably in accordance
with a common, central control. The movements of the transporting
star 1, of the transfer unit 2 and of the cassette wheel 3
preferably take place cyclically during the cycle of the
spring-coiling machine.
[0036] In the end position which is illustrated in FIG. 3b and
which the clamping plates 20 in the cassette wheel 3 have reached,
the pivoting flags 22 are pivoted further towards the wheel 3, so
that they push the spring F away from the clamping plates 20 into
the cassette compartment 30.
[0037] As can be seen in FIG. 2, each cassette compartment 30 has
two opposite walls between which the spring F is held under
compression. In order to transfer the spring, the cassette wheel 3
rotates about its central axis 31 in the direction of the arrow, so
that the spring F can be brought into a position rotated through
90.degree.. In this position, they are delivered individually to
the spring-transporting apparatus T.
[0038] This delivery can be seen in FIGS. 1 and 4. The cassette
wheel 3 has at least one transfer element 32. Each cassette
compartment 30 preferably has its own transfer element 32. This is,
as illustrated in FIG. 1, a pivotably mounted sliding arm with a,
for example, V-shaped notch for better guidance of the spring F.
The sliding arm 32 is mounted pivotably about the axis 33. If the
cassette compartment 30 has reached the desired rotational
position, the sliding arm 32 is activated and the spring F is
pushed out of the cassette compartment 30 into a transfer conveyor
4.
[0039] This transfer conveyor 4 has a lower transfer conveyor belt
40 and an upper transfer conveyor belt 41. The two belts are
endlessly revolving conveyors which are, however, preferably
operated synchronously with each other. FIG. 4 illustrates the
respective first deflection pulleys 42 and the second deflection
pulleys 43 around which the conveyor belts 40, 41 revolve. This
transfer conveyor 4 is preferably operated by means of servomotors
and preferably operates cyclically. However, other types of
operation are possible. For example, the transfer conveyor may also
be operated continuously. The individual springs F are slightly
compressed by means of the second belt conveyors 40, 41 and are
therefore transported, held under compression, by means of the
transfer conveyor 4 in the direction of the arrow.
[0040] The transfer conveyor 4 runs parallel, at at least
approximately the same height as and adjacent to a spring conveyor
6. It extends at least in some sections, namely in the region of
the upper and lower delivery points A, B, parallel to the spring
conveyor 6. The spring conveyor 6 preferably likewise comprises two
revolving, synchronously operated belt conveyors, the upper spring
conveyor belt in FIG. 4 being provided with the reference number 60
and the lower belt being provided with the reference number 61. The
first deflection pulleys 62 can be seen in FIG. 4, the second
deflection pulleys are not illustrated. Springs F which are
situated on the spring conveyor 6 are likewise fixed between the
two belts by resilient clamping and are transported in the
direction of the arrow. The drive of the spring conveyor 6 is
preferably cyclic. A servomotor may be used for this. However, it
is also possible to couple the spring conveyor 6 mechanically to
the spring-coiling machine and to operate it in the same cycle.
[0041] The transfer of the individual springs F from the transfer
conveyor 4 onto the spring conveyor 6 preferably takes place by
means of a change unit 5. The change unit 5 has a pivoting frame 50
with vertically running legs 51 and a horizontally running guide
rod 52 arranged between the legs. A second delivery means in the
form of a clamp 53 is arranged in a laterally displaceable manner
on this guide rod 52. The clamp 53 has, at its free end facing the
transfer conveyor 4, a stop surface 54 which runs at least
approximately perpendicularly to the conveying direction of the
transfer conveyor 4 and which is directed towards that delivery
point A of the transfer conveyor 4 which is at the top in the
conveying direction.
[0042] The clamp 53 is displaced along the guide rod 52 by means of
a motor as determined by the central control. The drive or
deflection pulley 55 used for this and the revolving toothed belt
56 are illustrated in FIG. 4 by chain-dotted lines.
[0043] The transfer of the individual springs F is described
below:
[0044] After a spring F has been pushed from the cassette wheel 3
onto the transfer conveyor 4, the transfer conveyor 4 is moved at a
relatively high speed in the direction of the arrow until the
spring F reaches the clamp 53 or a position predetermined by the
control. The transfer conveyor 4 is stopped again and the clamp 53
is pivoted in the direction of the spring conveyor 6 by means of
the pivoting frame 50. As a result, the spring F is delivered at a
lower delivery position B from the transfer conveyor 4 to the
spring conveyor 6. During this delivery, the two conveyors 4, 6 are
preferably at a standstill. The spring conveyor 6 then continues in
its customary cycle and the transfer conveyor 4 takes over the next
spring F supplied by the cassette wheel 3 and conveys it to the
clamp 53. In the meantime, the clamp 53, owing to its lateral
displaceability, can now move to a different lower delivery
position B relative to the spring conveyor 6.
[0045] In one variant of the method, the transfer conveyor 4 is not
completely stopped, rather continues to run at a reduced speed
during the transfer. In this case, the spring F is kept in its
position owing to the stop surface 54.
[0046] In a preferred alternative of the method, the transfer
conveyor 4 is being always operated in the same cycle. Thereby its
velocity is several times higher than the velocity of the spring
conveyor 6. During transport of the spring F to the lower delivery
point B the transfer conveyor drives further than the actual
delivery point B. However, the clamp 53 stops the spring F at the
lower delivery point B, so that the transfer conveyor 4 drags under
the spring F. It waits in that position until the spring conveyor 6
reaches its desired position. If that is the case, the spring F
will be delivered to the spring conveyor 6. Preferably the
frequencies of the conveyors 4, 6 are such, that during the
delivery at least the spring conveyor 6, preferably also the
conveyor 4, stand still between two cycles.
[0047] Only one single spring F is preferably ever situated on the
transfer conveyor 4. However, it is also possible to transport two
or more springs F simultaneously on the transfer conveyor 4, since
the conveying speed of the transfer conveyor 4 relative to the
conveying speed of the spring conveyor 6 can be selected
freely.
[0048] FIGS. 5a to 5f schematically illustrate a delivery of the
springs. In FIG. 5a, a first spring F1 has been delivered to the
transfer conveyor 4. In FIG. 5b, it has been transported to the
clamp 53 and waits in a first lower delivery point B1 for its
transfer. At the same time, a second spring F2 is already waiting
for its delivery. In FIG. 5c, the first spring F1 has been
delivered to the spring conveyor 6 and the transfer element 52 has
been pivoted towards the second spring F2. In FIG. 5d, this second
spring F2 is now delivered to the transfer conveyor 4. At the same
time, the spring conveyor 6 has continued to move in an ever
constant cycle. While the second spring F2 has been delivered to
the transfer conveyor 4, the clamp 53 has also been displaced to
the desired, new, lower transfer point B2, as can be seen in FIG.
5e. According to FIG. 5f, the second spring F2 can now be conveyed
up to this point and delivered there, with a third spring F3
already being made ready again. As a result, any desired groupings
of springs F can be formed on the spring conveyor 6 and the
distances between individual springs and the distances between
spring groups can be selected as desired. Nevertheless, the spring
conveyor 6 can be operated in a constant cycle.
[0049] In a further embodiment (not illustrated here), the
individual springs are pushed directly from the cassette
compartment 30 between the belts of the spring conveyor 6. In order
to attain any desired groupings and distances between the springs
on the spring conveyor 6 in this case, the spring conveyor 6 can be
operated by means of a servomotor. However, it is also possible to
already carry out a prepositioning process in the cassette wheel 3
by, for example, each spring F being displaced laterally to a
desired position during its transportation in the associated
cassette compartment and the delivery point from the cassette wheel
to the spring conveyor therefore being changed.
[0050] Furthermore, it is possible to deliver the spring F to a
conveyor apparatus configured in a different manner. In a further
embodiment, although the transfer of the individual springs from
the transfer conveyor to the spring conveyor takes place as
described above, the delivery of the springs to the transfer
conveyor is obtained with a means other than the rotary
cassette.
[0051] The spring-turning apparatus according to the invention
increases the flexibility in the delivery of springs from a
spring-coiling machine into a processing station. The method
according to the invention for forming rows of springs and the
spring-transporting apparatus according to the invention permit a
flexible arrangement of the springs while at the same time
minimizing operational breakdowns of the machine.
List of Reference Numbers
[0052] F Spring
[0053] F1 First spring
[0054] F2 Second spring
[0055] F3 Third spring
[0056] T Spring-transporting apparatus
[0057] A Upper delivery point
[0058] B Lower delivery point
[0059] B1 First lower delivery point
[0060] B2 Second lower delivery point
[0061] 1 Transporting star
[0062] 10 Gripping arm
[0063] 11 Clip
[0064] 2 Transfer unit
[0065] 20 Clamping plate
[0066] 21 Rotary plate
[0067] 22 Pivoting flag
[0068] 220 Arm
[0069] 221 Sliding plate
[0070] 23 Axis
[0071] 3 Cassette wheel
[0072] 30 Cassette compartment
[0073] 31 Central axis
[0074] 32 Sliding arm
[0075] 33 Axis
[0076] 4 Transfer conveyor
[0077] 40 Lower transfer conveyor belt
[0078] 41 Upper transfer conveyor belt
[0079] 42 First deflection pulley
[0080] 43 Second deflection pulley
[0081] 5 Change unit
[0082] 50 Pivoting frame
[0083] 51 Leg
[0084] 52 Guide rod
[0085] 53 Clamp
[0086] 54 Stop surface
[0087] 55 Pulley
[0088] 56 Toothed belt
[0089] 6 Spring conveyor
[0090] 60 Upper spring conveyor belt
[0091] 61 Lower spring conveyor belt
[0092] 62 First deflection pulley
* * * * *