U.S. patent application number 11/803146 was filed with the patent office on 2008-01-03 for milling machine table.
Invention is credited to Uwe Radermacher.
Application Number | 20080000395 11/803146 |
Document ID | / |
Family ID | 38777092 |
Filed Date | 2008-01-03 |
United States Patent
Application |
20080000395 |
Kind Code |
A1 |
Radermacher; Uwe |
January 3, 2008 |
Milling machine table
Abstract
The invention relates to a work table with a worktop (1) and an
insertion plate (2) insertable into an insertion opening (3) of the
worktop (1), wherein the edge (2') of the insertion plate (2) rests
on a step (4) of the insertion opening (3). It is proposed that the
edge (2') of the insertion plate (2) contains height adjustment
elements (15), resting on the step (4). Moreover, an essential
factor is a work table with a worktop (1) and an insertion plate
(2) insertable into an insertion opening (3) of the worktop (1),
wherein the edge (2') of the insertion plate (2) rests on a step
(4) of the insertion opening (3) and forms a gap (5) with the
interior wall (16) of the insertion opening (3), characterized in
that a clamping device (11) is provided which exerts a diagonal
tension force onto the insertion plate (2) in the extension of the
surface of the insertion plate (2).
Inventors: |
Radermacher; Uwe; (Weibern,
DE) |
Correspondence
Address: |
EVEREST INTELLECTUAL PROPERTY LAW GROUP
P. O. BOX 708
NORTHBROOK
IL
60065
US
|
Family ID: |
38777092 |
Appl. No.: |
11/803146 |
Filed: |
May 11, 2007 |
Current U.S.
Class: |
108/50.11 |
Current CPC
Class: |
B27C 5/10 20130101; B27C
5/06 20130101; B27C 5/02 20130101 |
Class at
Publication: |
108/50.11 |
International
Class: |
A47B 37/00 20060101
A47B037/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 30, 2006 |
DE |
102006030827.1 |
Mar 12, 2007 |
DE |
102007011784.3 |
Claims
1. A work table with a worktop (1) and an insertion plate (2)
insertable into an insertion opening (3) of the worktop (1),
wherein the edge (2') of the insertion plate (2) rests on a step
(4) of the insertion opening (3), characterized in that the edge
(2') of the insertion plate (2) contains height adjustment elements
(15), resting on the step (4).
2. A work table according to or in particular according to claim 1,
characterized in that the height adjustment elements (15) are
formed by grub screws (15) which are screwed into taps (20).
3. A work table with a worktop (1) and an insertion plate (2)
insertable into an insertion opening (3) of the worktop (1),
wherein the edge (2') of the insertion plate (2) rests on a step
(4) of the insertion opening (3) and forms a gap (5) with the
interior wall (16) of the insertion opening (3), characterized in
that a clamping device (11) is provided which exerts a diagonal
tension force onto the insertion plate (2) in the extension of the
surface of the insertion plate (2).
4. A work table according to or in particular according to one or
more of the preceding claims, characterized in that the clamping
device affects one corner of the essentially rectangular insertion
plate (2) and pushes the corner of the insertion plate (2)
diagonally opposing this corner against the interior walls (16) of
the insertion opening (3) which come together there.
5. A work table according to or in particular according to one or
more of the preceding claims, characterized in that the clamping
device is an eccentric cam (11), arranged in a bearing recess (21)
of the worktop (1).
6. A work table according to or in particular according to one or
more of the preceding claims, characterized in that the eccentric
cam (11) can be turned from the underside of the worktop (1).
7. A work table according to or in particular according to one or
more of the preceding claims, characterized in that a turning
handle (25) to turn the eccentric cam (11) is arranged below the
worktop (1).
8. A work table according to or in particular according to one or
more of the preceding claims, characterized in that the eccentric
cam (11) cooperates with a counter-clamping force (14) of the
insertion plate (2) formed by a rounded recess in the corner.
9. A work table according to or in particular according to one or
more of the preceding claims, characterized in that a drive device
(8) for a tool, in particular a milling cutter (9) can be mounted
at the underside of the insertion plate (2), wherein the tool, in
particular the milling cutter (9) protrudes from an opening (26) in
the insertion plate (2).
Description
[0001] The invention concerns a work table, in particular a milling
table with a worktop and an insertion plate insertable into an
insertion opening of the worktop, where the edge of the insertion
plate is placed onto a step of the insertion opening.
[0002] This type of worktable is currently on the market as a
milling machine table. The milling machine table is equipped with a
work plate supported by several feet. A moveable stop rail is
arranged on the top side of the worktop opposite a milling cutter.
The milling cutter sits on the drive shaft of the drive motor. The
motor is located on the underside of an insertion plate, inserted
into an insertion opening of the worktop. The milling cutter
protrudes from an opening in the insertion plate. The insertion
plate is inserted flush with the worktop and lies in the opening
without a gap. The dimensions of the insertion plate must be
matched very exactly to the dimensions of the insertion opening.
The tolerances must be very small to prevent the insertion plate
from moving within the worktop or to avoid the formation of a step
between the top of the insertion plate and the top of the
worktop.
[0003] A milling machine table including accessories has been
described in DE 102005009227 A1, which can be a commercial routing
machine clamped against the underside of the worktop by means of
clamping claws. Compared to the type-defining prior art mentioned
above, this solution has the disadvantage that the exchange of a
tool is time-consuming. Either, a correspondingly equipped routing
machine needs to be exchanged for a different routing machine, or
the routing machine needs to be equipped with a different milling
cutter. Again, the disassembly of the routing machine is required.
The exchange of the tool is easier when using the state of the art
mentioned in the beginning, in that the insertion plate bearing the
drive motor can be removed from the insertion opening. An insertion
plate containing a machine with a milling cutter can be exchanged
for a different insertion plate equipped with a different machine
and a different milling cutter. Moreover, the exchange of the
machine on the insertion plate is easier as well.
[0004] The object of the invention is to simplify the type-defining
milling machine table in terms of the technical production.
[0005] The object is solved by means of the invention outlined in
the claims. Each claim provides an independent solution of the
object and is combinable with any one of the other claims in any
form.
[0006] First and foremost, it is intended that the edge of the
insertion plate is equipped with height-adjustable elements,
supported on the step. Based on this embodiment, the height
tolerance of both the step and the insertion plate can be larger.
To prevent the formation of a step between the top of the insertion
plate and the top of the worktop, the height of the insertion plate
can be adjusted relative to the step. Preferably, the height
adjustment elements are grub screws screwed into corresponding taps
on the edge of the insertion plate. The blunt ends of the grub
screws rest on the step of the insertion opening. In an alternative
solution of the object, which can be realized in combination with
the solution described above, the use of a clamp is intended. This
clamp is located in the corner of the insertion opening. The clamp
possesses a clamping surface which cooperates with the
counter-clamping surface of the insertion plate. The
counter-clamping surface is located in one of the corners of an
essentially rectangular insertion plate. The clamp exerts a tension
force onto the insertion plate, resulting in the extension of the
surface. The effect of the tension force in the opposing corner is
such that the exterior walls of the insertion plate colliding in
this rounded corner as the case may be are pushed against the
interior walls of the insertion opening that come together in this
corner. The result is a gap between the two walls of the insertion
opening and insertion plate facing these two walls mentioned
before. The clamp can be located in a recess of the worktop. It can
consist of an eccentric cam. The eccentric cam can be turned from
the underside of the worktop. For this purpose, the worktop will be
equipped with a turning handle. The counter-clamping surface of the
insertion plate is formed by a rounded recess in the corner.
Otherwise, the worktop is equipped with four legs on its underside,
similar to the device described in DE 102005009227 A1. The milling
machine table according to the invention is equipped with a stop
rail, essentially corresponding to the stop rail described in the
patent application mentioned above. Preferably, the work table is a
work bench where a motor-driven tool is attached. A drive for the
tool can be attached on the underside of the insertion plate. The
tool protrudes from an opening in the insertion plate. The tool can
be a drive-driven milling cutter. It can be an end-milling cutter,
a profiling cutter or similar machining tool. The work table is
especially suitable to hold a machine and in particular a hand tool
machine. Therefore, the work table is preferable a supporting
table. In addition to the previously mentioned milling cutter,
electrically driven tools can include a compass saw, a circular saw
or a plane. Any electrically driven hand tools can be mounted below
the insertion plate, so that the tools protrude from an
opening.
[0007] An exemplary embodiment of the invention is illustrated
below, based on the attached drawings. The figures illustrate the
following:
[0008] FIG. 1 top view of a milling machine table with the
insertion plate inserted in the insertion opening and mounted stop
rail;
[0009] FIG. 2 illustration according to FIG. 1, but without stop
rail;
[0010] FIG. 3 illustration according to FIG. 1, but without stop
rail and with the insertion plate removed;
[0011] FIG. 4 lateral view of the milling machine table according
to FIG. 1;
[0012] FIG. 5 bottom view of the milling machine table according to
FIG. 1;
[0013] FIG. 6 enlarged section according to line VI in FIG. 1 in
the clamping position of the eccentric cam;
[0014] FIG. 7 illustration according to FIG. 6 in the release
position of the eccentric cam;
[0015] FIG. 8 cross-section according to line VIII-VIII in FIG.
6;
[0016] FIG. 9 cross-section according to line IX-IX in FIG. 2;
[0017] FIG. 10 cross-section according to line X-X in FIG. 6.
[0018] Essentially, the shape of the milling machine table is
identical to the shape described in DE 102005009227 A1. Insofar,
the full content of this brochure is included in the content of the
disclosures of this application, in particular with respect to the
supplementation of the claims and the description.
[0019] The worktop 1 is arranged horizontally. The surface 1'' of
the worktop 1 is equipped with a stop rail 6. The stop rail 6 is
equipped with a protective cap 10 and fittings to attach the stop
rail 6 on the top side 1'' of the worktop 1. The fittings can be
clamping screws with the ends reaching through longitudinal slots.
In addition, the top side 1'' of the worktop 1 is equipped with a
guiding groove 7 to provide a moveable stop.
[0020] The worktop 1 is equipped with an essentially square
insertion opening 3. The corners of the insertion opening 3 can be
rounded. The insertion opening 3 possesses an edge 2' created by a
step 4.
[0021] The edge 2' of in insertion plate 2 rests on the step 4. The
thickness of the material of the insertion plate 2 is slightly
smaller than the distance from step 4 to the surface 1'' of the
worktop. The edge 2' of the insertion plate 2 is equipped with
several taps 20. Each tap contains a grub screw 15. The axial
length of the grub screw 15 is smaller than the thickness of the
material of the insertion plate 2. As a result, the grub screw 15
does not protrude from the tap 20 beyond the surface 2'' of the
insertion plate 2, if its basic surface is flush with the underside
of the insertion plate 2. The basic surface of the grub screw 15 is
supposed to rest on the step 4. This allows the adjustment of a gap
between the underside of the insertion plate 2 and the step 4 in
such a way that the surface 2'' of the insertion plate 2 can be
arranged flush with the worktop 1. The grub screw 15 can be turned
using a corresponding screwdriver, such as a flat wrench, four-way
socket wrench or a hex head wrench.
[0022] One of the corners of the insertion opening 3 contains a
rounded recess 21. This recess 21 contains an eccentric cam 11 made
of metal, in particular steel. The eccentric cam 11 is equipped
with an axle protruding the recess 21 through an opening in the
bottom. The underside of the worktop 1 is equipped with a bearing
housing 24 with a shaft bushing. The shaft bushing is flush with
the opening in the floor of recess 21, so that the actuating shaft
for the eccentric cam 11 can be arranged on the bearing housing 24.
An actuating handle 25 which can be operated manually by the user
sits at the end of the actuating shaft 27. When the turning handle
25 is turned, the eccentric cam 11 is turned too. The clamping
surface 13 is located opposite a surface with a reduced radial
distance.
[0023] The outline of the insertion plate 2 essentially corresponds
to the outline of the interior wall 16 of the insertion opening 3,
where the lateral dimensions of the insertion plate 2 are slightly
smaller than the lateral dimensions of the insertion opening. As a
result, a gap can occur between the exterior wall 17 of the
insertion plate 2 and the interior wall 16 of the insertion opening
3. The corner of the insertion plate 2 allocated to the eccentric
cam 11 is equipped with a rounded recess forming a counter-clamping
surface 14. If the insertion plate 2 is placed into the insertion
opening 3 on step 4 and the grub screws 15 have been screwed in at
optimal screwing depth, the eccentric cam 11 can be turned by means
of the actuating handle 25. As a result, the clamping surface 13
opposes the counter-clamping force 14. The eccentric cam 11
generates a tension force in the direction of the expansion of the
insertion plate 2 toward the corner 28 of the insertion plate
opposite the corner containing the recess. The rounded corner 28 of
the insertion plate 2 of the exemplary embodiment is pushed into
the allocated rounded corner of the insertion opening 3. As a
result, the exterior walls 17 of the insertion plate 2 touching one
another in this corner are opposing the allocated interior walls 16
of the insertion opening 3. Associated herewith, the gap between
the interior walls 16 and exterior walls 17 in the area of these
two vertically arranged joints displayed in FIG. 2 closes. However,
the joints opposing the joints mentioned above contain a gap 5
between the interior walls 16 and exterior walls 17, which
increases as a result of the increased tension force.
[0024] In this tense state, the insertion plate 2 can not be
removed from the insertion opening 3. This is only possible with
the activation of the actuating handle 25 to return the eccentric
cam 11 into its release position in which the radially reduced
section of the circumference of the eccentric cam 11 is located in
front of the rounded recess of the corner 14.
[0025] Mould clamping devices can be provided to improve the
support of the insertion plate 2 within the insertion opening 3. As
illustrated in FIG. 8, the exterior wall 17 of the insertion plate
2 which leans on the interior wall 16 in the tense state, can be
equipped with a spring 19. This is a recess engaging in a slot 18
of the interior wall 16. The height of the spring 19 is smaller
than the width of the slot 18 to allow the adjustment at the
insertion plate 2.
[0026] The eccentric cam 11 can also be equipped with mould
clamping devices to improve the capture of the insertion plate 2 in
the insertion opening 3. It can be equipped with an arc-shaped
protrusion 23 in the area of the clamping surface 13, casing a
corresponding step 22 of the counter-clamping surface 14.
[0027] Axial fixation devices, not displayed, will be provided to
arrange the eccentric cam 11 in recess 21 in a rotary manner, while
preventing it from axial displacement. The surface of the broadside
of the eccentric cam 11 can have a distance to the surface 1'' of
the worktop 1, resulting in a recess in this area.
[0028] All (individually) disclosed features are relevant to the
invention. The full content of the disclosure of the
associated/attached priority documents (transcript of the previous
application) is included in the disclosure of the application, for
the purpose of including the features outlined in these documents
into the claims of the present application.
* * * * *