U.S. patent application number 15/122046 was filed with the patent office on 2017-03-09 for underground securing system comprising a rock bolt that includes an attachment device.
This patent application is currently assigned to K+S KALI GMBH. The applicant listed for this patent is K+S KALI GMBH. Invention is credited to Juergen RADICK, Wolfgang SIELING.
Application Number | 20170067340 15/122046 |
Document ID | / |
Family ID | 52874897 |
Filed Date | 2017-03-09 |
United States Patent
Application |
20170067340 |
Kind Code |
A1 |
SIELING; Wolfgang ; et
al. |
March 9, 2017 |
UNDERGROUND SECURING SYSTEM COMPRISING A ROCK BOLT THAT INCLUDES AN
ATTACHMENT DEVICE
Abstract
The invention relates to a securing system for the roof (10) of
an underground road, said securing system comprising a rock bolt
(1) to which a mobile attachment device (20) can be secured, said
attachment device (20) being connected to the rock bolt (1) so as
to be freely rotatable relative to the rock bolt (1).
Inventors: |
SIELING; Wolfgang;
(Schenklengsfeld, DE) ; RADICK; Juergen;
(Heringen, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
K+S KALI GMBH |
Kassel |
|
DE |
|
|
Assignee: |
K+S KALI GMBH
Kassel
DE
|
Family ID: |
52874897 |
Appl. No.: |
15/122046 |
Filed: |
February 25, 2015 |
PCT Filed: |
February 25, 2015 |
PCT NO: |
PCT/DE2015/000091 |
371 Date: |
August 26, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
E21D 21/008 20130101;
E21D 21/0093 20130101; E21D 21/0026 20130101; E21D 21/02
20130101 |
International
Class: |
E21D 21/00 20060101
E21D021/00; E21D 21/02 20060101 E21D021/02 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 26, 2014 |
DE |
10 2014 002 566.7 |
Claims
1. A fastening system of a gallery roof of a route section
underground, wherein the fastening system comprises a rock bolt and
an anchor device configured to be fastened to the rock bolt,
wherein the anchor device is configured to be connected with the
rock bolt freely pivoting relative to the rock bolt.
2. The fastening system according to claim 1, wherein the anchor
device comprises a screw-in sleeve configured for connection with
the rock bolt.
3. The fastening system according to claim 2, wherein the anchor
device is configured to be connected with the rock bolt through a
screw-thread connection.
4. The fastening system according to claim 2, wherein the anchor
device comprises a screw-in sleeve, the screw-in sleeve comprising
an internal thread, wherein the screw-in sleeve is configured to be
screwed onto a protruding part of an anchor rod of the rock
bolt.
5. The fastening system according to claim 2, wherein the screw-in
sleeve comprises a shoulder configured for reception of a
sleeve-shaped swirl unit.
6. The fastening system according to claim 5, wherein the swirl
unit indicates comprises an inset-attachment element.
7. The fastening system according to claim 6, wherein the
inset-attachment element is a strap.
8. The fastening system according to claim 5, wherein a bearing is
arranged between the shoulder and the swirl unit.
9. The fastening system according to claim 5, wherein a bolt head
is arranged on the shoulder configured for the bedding of a
tool.
10. The fastening system according to claim 4, wherein the anchor
device comprises an indication element configured for the
determination of a screw-in depth between the screw-in sleeve and
the protruding part of the anchor rod of the rock bolt.
11. The fastening system according to claim 10, wherein the
indication element is a pin.
12. The fastening system according to claim 11, wherein the pin is
in a bore in a bolt head and a shoulder and extends with one end
into a hollow space of the screw-ion sleeve.
13. The fastening system according to claim 10, wherein the
indication element is configured to be taken up non-positively by a
bolt head or a shoulder of the anchor device.
14. A fastening system of a gallery roof of a route section
underground, comprising: a rock bolt; and an anchor device
configured to be fastened to the rock bolt, the anchor device
comprising a screw-in sleeve configured for a thread connection
with the rock bolt; wherein the anchor device is configured to be
connected with the rock bolt freely rotating about a vertical axis
relative to the rock bolt without rotating off from the rock
bolt.
15. The fastening system according to claim 14, wherein the
screw-in sleeve comprises a shoulder configured for the reception
of a sleeve-shaped swirl unit; and wherein a bolt head is arranged
on the shoulder configured for the bedding of a tool.
16. The fastening system according to claim 3, wherein the
screw-thread connection is a self-locking screw thread.
17. The fastening system according to claim 7, wherein the
inset-attachment element is configured for the reception of a
spring hook of a protective harness.
18. The fastening system according to claim 8, wherein the bearing
is at least one bearing selected from the group consisting of an
axial ball bearing and a plain bearing.
19. The fastening system according to claim 12, further comprising
an arrest wire configured to catch the pin; wherein the arrest wire
is held with a ring fastener to the anchor device.
20. A method of attaching to a gallery roof of a route section
underground, comprising: fastening with the system of claim 6, the
fastening comprising; screwing the anchor device onto a threaded
piece of the rock bolt extending beyond the rock; and connecting a
spring hook to the inset-attachment element.
Description
[0001] The invention concerns a fastening system on the gallery
roof of a route section underground or in tunnel construction,
where the fastening system includes a rock bolt to which an anchor
device is fixed.
[0002] Rock bolts are sufficiently known from the state of the art
of the technology. Concerning that, WO 2012/053965 A1 is referred
to as an example. Rock bolts usually consist of an anchor rod which
protrudes into the gallery roof where an anchor plate is attached
end-sided on the anchor rod with an anchor nut. With the aid of
these rock bolts, the route section is secured in the area of the
working face and gallery roof. The falling down of plate-shaped
rock formations, or also salt layers, should be prevented by such
rock bolts in particular. This means that such rock bolts are used
for the stabilization of the route sections.
[0003] Now it is also known from the state of the art of the
technology to use rock bolts as load anchors and to attach load
carrying supports (e.g. lugs for the attachment of loads) to such
rock bolts for this purpose. In the simplest case it is planned
that, from the rock bolt, a part of the anchor rod provided with a
screw thread protrudes from the gallery roof, to which the
corresponding load-carrying supports are bolted with an internal
thread. Such load-carrying supports serve for the fixing of loads,
such as e.g. utility supply lines (pipes), power cables or also
lighting equipment. From this it is clear that the area of
application of such rock bolts is diverse.
[0004] For the attachment of this type of rock bolt, both in the
working face as well as a gallery roof area, equipment devices are
known which enable the incorporation of such anchors from the
ground.
[0005] In case of the assembly or dismantling of systems, or also
in case of repair and maintenance work, above a height of 1 m
working height underground, a proper protection against fall of the
persons working there is to be carried out.
[0006] One possible procedural method, e.g. in order to guarantee a
fall protection in case of the installation or dismantling of
systems, is that the persons are lifted to the working height with
the aid of a lifting platform with corresponding rail, in order to
enable the corresponding work to be carried out. These and also
other technical measures for protection against fall from a height
(such as e.g. the structuring of scaffolds) are in-part very
extensive and difficult to apply environmentally-related or also
dependent on the situation.
[0007] In order to now enable a fall protection for the persons
carrying out the work which is usable with a low outlay, but which
is effective and satisfies the requirements of occupational safety,
the subject of this invention is a fastening system for arrangement
on the gallery roof underground. A fastening system as a fall
protection which satisfies the requirements of occupational health
and safety is characterized invention-related by the
characteristics of claim 1.
[0008] The subject of the invention is accordingly that the anchor
device for the rock bolt is connected pivoting with the rock bolt.
This against the following background: The persons who carry out
the assembly work move and under certain circumstances are also
rotated around their own axis.
[0009] In particular the person ensured by the anchor device can
swing on the safety line in case of a fall from a height. As a
result of the anchor device being freely pivoting on the rock bolt
(rotation swirl function) the hazard does not exist that they
rotate off from the rock bolt if the secured person is connected
with the anchor device over a harness with the corresponding
components by a spring hook.
[0010] For the above demonstrated reasons it is prohibited that
persons secure themselves by means of spring hooks on the load
carrying supports which are fixed, or become fixed, on the rock
bolt for the reception of loads. The lug described in WO
2012/053965 A1, as previously dealt with, is connected directly and
not freely pivoting by a screw thread with the actual rock bolt and
is therefore unsuitable as a fall protection.
[0011] Basically the invention-related fastening system can
therefore be used in every case where a personal protection is
necessary against fall from a height. This is the case at a working
height above one meter, when other safety devices are not existing
or, dependent on the situation, are difficult to use.
[0012] Advantageous characteristics and structuring of the
invention result from the subordinate claims.
[0013] Thus it is in particular planned that the anchor device
indicates a screw-in sleeve for the connection with the rock bolt.
An advantage here is the screw-thread connection between the rock
bolt and the planned anchor element, where a so-called self-locking
screw thread is inserted, in particular as screw thread, for
example in the form of a trapezoidal thread.
[0014] This is in order to avoid a rotating-off of the screw
thread. In detail the anchor device is characterized by a screw-in
sleeve with internal thread, where the screw-in sleeve can be
screwed onto the anchor rod of the rock bolt.
[0015] Furthermore, an advantage is that it has a shoulder for the
reception of a sleeve-shaped swirl unit, where the swirl unit
indicates an inset-attachment element, e.g. in the form of a strap,
where the inset-attachment element serves for the reception of, for
example, a spring hook of the protective harness of the person
fixed to it. According to an especially advantageous
characteristic, it is planned that a bearing is arranged between
the shoulder and swirl unit, in particular an axial ball bearing,
which minimizes the friction between the sleeve-shaped swirl unit
on the one hand, and the shoulder on the screw-in sleeve on the
other hand. Conceivable, however, is not only the employment of a
thrust bearing in the form of a ball bearing, but also the
employment of a corresponding plain bearing. In this way the
situation is achieved where the swirl unit can rotate freely with
small frictional forces, without the anchor sleeve detaching from
the anchor rod of the rock bolt.
[0016] According to a further advantageous characteristic, it is
planned that a bolt head for the bedding of a tool is arranged on
the shoulder of the screw-in sleeve. The bolt head can be developed
in this case similar to the tip of a screwdriver, by which the
possibility is provided to screw the limit-stop lug onto the anchor
rod of the rock bolt from the ground with the aid of a bar and the
corresponding screw-on equipment, which indicates end-sided a tool
head U-shaped in the cross-section for the reception of the bolt
head.
[0017] According to a further advantageous characteristic of the
invention, it is planned that the anchor device has an indication
element for the determination of the screw-in depth of the screw-in
sleeve on the anchor rod of the rock bolt.
[0018] This means that, as a result of this indication element, it
is made identifiable to the person who implements the screwing of
the anchor device onto the anchor rod of the rock bolt from the
ground with the aid of the previously-designated bar that, for a
secure attachment of the anchor device on the rock bolt, the
screw-in sleeve and anchor rod of the rock bolt are connected with
each other with a corresponding number of turns of the thread. In
particular it is planned that the screw-in sleeve and anchor rod
are connected with each other over at least four turns of the
thread. The number of turns of the thread can also vary dependent
on the anchor characteristics.
[0019] In this case, the indication element is developed in
particular as a pin, where the pin is seated in a bore in the bolt
head and/or in the shoulder of the screw-in sleeve and extends with
one end into the hollow space of the screw-in sleeve. The fixing of
the indication element in the anchor device is implemented
force-locking, for example using friction. From this it is clear
that the dimension with which the pin extends into the screw-in
sleeve determines the minimum screw-on depth of the anchor sleeve
on the threaded bolt of the rock bolt. This is because, in case of
reaching the corresponding screw-on depth, the pin is forced out
from the bore by the anchor rod of the rock bolt; it drops out
(possibly caught by an arrest wire that is held with a ring
fastener on the anchor device), and the person who carries out the
screwing on of the anchor device can identify that the
corresponding minimum screw-on depth has been reached.
[0020] This means that, for the protection of persons who work at
greater heights, the procedure is now as follows: The rock bolt
indicates a threaded piece extending beyond the rock. The
invention-related anchor device is screwed onto this threaded piece
with the corresponding screw-on equipment, possibly with the aid of
a correspondingly long bar, e.g. a telescopic tube.
[0021] After that the spring hook is connected possibly with the
same bar with the inset-attachment element (e.g. in the form of a
strap) of the anchor device. Then the ascent to working height can
begin.
[0022] The anchor device can be used repeatedly.
[0023] By means of the drawings, the invention is explained in more
detail with examples.
[0024] FIG. 1 indicates a side view in the section on the fastening
system, therefore the anchor device 20 with the rock bolt seated in
the rock bolt 1;
[0025] FIG. 2 indicates a view in accordance with the Line II-II
from FIG. 1.
[0026] The rock bolts designated in total with 1 include the anchor
rod 8 from which a part 3 protrudes free downward from the gallery
roof. In the area of the transition to the gallery roof 10 an
anchor plate 5 is fixed on the protruding part of the anchor rod 3
with the aid of an anchor nut 4, which construction protects the
gallery roof 10. The fixing of the rock bolt 1 in the rock is not
dealt with in any detail at this point. The subject of the
invention is now the rock bolt 1 in connection with the anchor
device 20 and the anchor device itself. The anchor device 20, which
can also be designated as a limit stop lug, includes a screw-in
sleeve 22, where the screw-in sleeve 22 is provided with an
internal thread 26, where the screw-in sleeve 22 indicates a
shoulder 28 end-sided. On the shoulder 28 is located the bolt head
30 (e.g. developed like the tip of a screwdriver), where the bolt
head 30 of the connection with screw-on equipment serves to enable
the screwing on of the screw-in sleeve 22 with the internal thread
26 on the protruding part of the anchor rod 3 of the rock bolt 1
from the ground.
[0027] The anchor element designated with 40 includes the screw-in
sleeve 22 with the shoulder 28, the bolt head 30 and the ball
bearing 44, as well as the swirl unit 24.
[0028] On the shoulder 28 rests the sleeve-shaped swirl unit
designated with 24. The swirl unit 24 indicates a movable strap 42
as an inset-attachment element, which serves for the attachment of
for example a spring hook of the protective harness of the person
e.g. working with the installation of loads. Between the front side
of the sleeve-shaped swirl unit 24 and the shoulder 28 on the
screw-in sleeve 22 is located for example an axial ball bearing 44,
so that the friction between the swirl unit 24 and the shoulder 28
is decreased if the swirl unit 24 rotates around the screw-in
sleeve 22 fixed-connected with the shoulder 28. In this respect a
slight radial separation distance exists between the sleeve-shaped
swirl unit and the screw-in sleeve, The screw-in sleeve 22 is
secured with the swirl unit 24 by a retaining ring 27 e.g. in the
form of a snap ring.
[0029] The shoulder 28 and the bolt head 30 on the screw-in sleeve
22 have a bore 34. The bore 34 is used for the reception of a pin
36 as an indication element for the determination of the screw-in
depth of the screw-in sleeve 22 on the protruding part 3 of the
anchor rod 8 of the rock bolt 1. This means that if the pin 36
impacts with its front side onto the front side of the anchor rod 8
of the rock bolt 1, this is then forced from the bore 34. The
result is that it falls down and hangs on the arrest wire 37, which
is fixed over a ring fastener 38 on the strap 42.
[0030] In this way the person who implements the screwing on of the
anchor device 20 can identify that the anchor device 20 is
connected with the anchor rod 8 over the necessary number of turns
of the thread, in particular four.
REFERENCE LIST
[0031] 1 Rock bolt [0032] 3 End of the anchor rod protruding from
the gallery roof [0033] 4 Anchor nut [0034] 5 Anchor plate [0035] 8
Anchor rod [0036] 10 Gallery roof [0037] 20 Anchor device [0038] 22
Screw-in sleeve [0039] 24 Swirl unit [0040] 26 Internal thread
[0041] 27 Retaining ring [0042] 28 Shoulder [0043] 30 Bolt head
[0044] 34 Bore [0045] 36 Pin (indication element) [0046] 37 Arrest
wire for pin [0047] 38 Ring fastener for arrest wire [0048] 40
Anchor element [0049] 42 Strap (inset-attachment element) [0050] 44
Ball bearing
* * * * *