WO2022063989A1

WO2022063989A1 - Clamping apparatus, clamping system and method for handling a clamping apparatus

Info

Publication number: WO2022063989A1
Application number: PCT/EP2021/076366
Authority: WO
Inventors: Dierk Finkemeyer
Original assignee: Gla-Wel Gmbh
Priority date: 2020-09-24
Filing date: 2021-09-24
Publication date: 2022-03-31
Also published as: DE102020124924A1

Abstract

The invention relates to a clamping apparatus (10) for a perforated plate (19), in particular a perforated table plate, such as a work table and/or welding table and/or clamping hole table, for example, having at least one hole (20), preferably a plurality of identical holes (20), wherein the at least one hole (20) is preferably designed as a borehole and/or penetration, having a retaining bolt (11) which can be guided through the at least one hole (20) and braced with the perforated plate (19), wherein the retaining bolt (11) has a retaining element (12) and a counterpart retaining element (16), preferably a counterpart disc, for bracing with the perforated plate arranged therebetween. The clamping apparatus (10) is characterized in that the retaining element (12) has a mounting configuration for guiding through a hole (20) in the perforated plate (19) and a clamping configuration for bracing with the perforated plate (19). The invention furthermore relates to a clamping system having a perforated plate (19). Finally, the invention relates to a method for handling such a clamping apparatus (10) having a perforated plate (19).

Description

Clamping device, clamping system and method of handling a clamping device

description

The invention relates to a tensioning device according to the preamble of claim 1 . Furthermore, the invention relates to a clamping system according to the preamble of claim 12. Finally, the invention relates to a method for handling a clamping device according to the preamble of claim 13.

In many production areas and especially in metal and mechanical engineering, special work tables are used, for example as work, welding or assembly tables. In order to be able to attach the various workpieces, tools and holders firmly and securely to the table, the tabletops must be prepared in a suitable manner. As a tabletop, the perforated plate is aligned at least essentially horizontally. However, such perforated plates can also be aligned in other installation situations, for example vertically or at any other desired angle to the horizontal, optionally also adjustable.

In many cases, the table tops are designed as so-called perforated panels or perforated table tops. This means that the table top or perforated plate has a certain number, depending on the application, even a large number of holes. These holes are typically arranged regularly, that is to say in particular at equal intervals.

The holes are mostly openings, ie continuous holes. The holes are usually designed as circular or cylindrical bores. However, they can also be provided, at least in part, as oblong holes, that is to say as slit-shaped openings.

In order to simplify attachment using identical attachment means, the holes usually have identical diameters. In the case of oblong holes, the slot width corresponds to the diameter of the holes. A perforated plate preferably has holes with identical diameters. Optionally, holes can also be different

SUBSTITUTE SHEET (RULE 26) Be provided diameter and corresponding fasteners for different diameters.

Fastening devices or clamping devices for such perforated plates or tables are known from the prior art.

These clamping devices have a central clamping bolt or retaining bolt that is inserted through the respective hole in the perforated plate. On top of the perforated plate, the retaining bolt typically has a washer as a counter-retaining element or counter-retaining element. The counter-holding element rests on the perforated plate. For bracing, another washer may have to be screwed to the retaining bolt from below the table top with a nut. This means that high holding torques can be achieved. To do this, however, you have to work from underneath the table.

Other solutions do offer operation from above, in that polygonal or spherical elements are then extended laterally from the bolt as counter bearings, in particular rods or balls. However, the disadvantage here is the extremely low load capacity, which results from only small contact surfaces between the counter bearing and the underside of the table and thus a high surface pressure. As a rule, forces greater than 10 kN in the longitudinal direction cannot be absorbed. Also, in some cases only one-sided bearing surfaces are provided, so that one-sided loads or tensioning forces occur.

Accordingly, a disadvantage of the known clamping devices is that either the handling in general and, in particular, the assembly and disassembly are complex or only small forces can be absorbed. In particular, after inserting the retaining bolt on the top, it must be braced on the underside. With other solutions that can be operated from above, on the other hand, only insufficient holding torques can be achieved so far.

It is therefore an object of the invention to eliminate these disadvantages. In particular, the handling and preferably the assembly and disassembly should be simplified with high resilience.

A clamping device with the features of claim 1 solves this problem. This clamping device, in particular a clamping screw, is for a perforated plate, in particular a perforated table plate, such as a workbench and/or welding table and/or

SUBSTITUTE SHEET (RULE 26) clamping hole table, provided. The perforated plate has at least one hole, preferably a large number of identical holes, the at least one hole preferably being designed as a bore and/or opening. A retaining bolt is provided which can be passed through the at least one hole and braced with the perforated plate. The retaining bolt has a retaining element and a counter-retaining element, preferably a counter disk, for bracing with the perforated plate arranged between them. The clamping device is characterized in that the holding element has a mounting configuration for passing through a hole in the perforated plate and a clamping configuration for bracing with the perforated plate. In this way, the handling of the clamping device is significantly simplified compared to the prior art. With the present solution, forces greater than 10 kN can preferably be absorbed in the longitudinal direction.

The holding element preferably has a plurality of holding element parts. Two holding element parts are preferably provided. More preferably, the assembled holding element parts in the clamping configuration form the holding element and/or the holding element in the clamping configuration composed of the holding element parts. Multiple retainer parts allow multiple configurations of the retainer to be set, particularly the mounting configuration and the clamping configuration. All holding element parts in the clamping configuration preferably absorb the clamping forces together, preferably distributed over the circumference. In particular, the holding element parts form a common support surface. A common support surface is provided in particular to form the largest possible surface contact with the perforated plate. Preferably, at least almost the entire circumference of the holding element should be in contact with the perforated plate to absorb the clamping forces. The holding element or the holding elements should preferably be in contact with the perforated plate distributed over the circumference, in particular in sections and/or evenly. In this way, in particular, one-sided and/or lateral effects of force can be avoided.

The holding element can preferably be adjusted between a plurality of states, in particular between two states, preferably between the mounting configuration and the clamping configuration. More preferably, this is done by pivoting and/or shifting the holding element parts relative to one another. In this way, the configurations can be changed simply by relative displacement of the holding elements.

SUBSTITUTE SHEET (RULE 26) The retaining element, in particular together with the retaining bolt, has an overall diameter in the assembly configuration that is smaller than the hole diameter of the perforated plate. The retaining element, in particular together with the retaining bolt in the clamped configuration, has an overall diameter that is larger than the hole diameter of the perforated plate. This significantly simplifies handling.

The holding element parts are preferably guided on a common longitudinal axis. The holding element parts can preferably be displaced and/or rotated and/or pivoted along the longitudinal axis. This longitudinal axis is preferably the longitudinal axis or the longitudinal center axis of the tensioning device or the retaining bolt.

The holding element parts are preferably shaped to correspond to one another and/or the holding element parts are shaped in a form-fitting manner to one another and/or can be assembled.

The holding element parts are locked to one another in the clamped configuration or are firmly engaged with one another for common load bearing. The forces act in particular as a tensile load, in particular accordingly on the retaining bolt and the retaining elements as well as the counter-retaining element.

The retaining element parts are preferably individually designed asymmetrically or eccentrically to the longitudinal axis of the retaining bolt. More preferably, the at least one retaining element part is designed as a projection in the shape of a segment of a circle and/or a semi-circle. These forms offer the possibility of assembling the holding element from a plurality of holding element parts which fit together. The holding element parts are, in particular, eccentric halves. The holding element parts are preferably formed eccentrically to the longitudinal axis.

One of the retaining element parts is preferably firmly connected to the retaining bolt. This connection is preferably permanent and/or detachable. The connection is made, for example, by a screw connection, in particular a secured screw connection. This part of the retaining element is thus securely and permanently connected to the retaining bolt. The retaining bolt has a thread and a corresponding nut as a counter-retaining element for the retaining element. The retaining bolt can be clamped in particular with the counter-retaining element against the lower retaining element by screwing. The counter-holding element is a prerequisite for clamping with the perforated plate. The combination of a counter-retaining element and a retaining element on the retaining bolt thus enables bracing.

SUBSTITUTE SHEET (RULE 26) More preferably, one of the holding element parts is mounted in the manner of a sleeve on the holding bolt. In particular by means of a sleeve for slipping onto the retaining bolt, the sleeve preferably being longitudinally displaceable along and/or rotatable about the longitudinal axis of the retaining bolt. The holding element parts can thus be moved and adjusted relative to one another.

The outer contour of the retaining element is preferably formed at least substantially symmetrically to the longitudinal axis of the retaining bolt in the clamping configuration. The support surface is preferably at least essentially circular. The holding element thus has an optimal contact surface for bracing with the perforated plate. The outer contour of the retaining element is preferably designed asymmetrically to the longitudinal axis of the retaining bolt in the assembly configuration. The cross section of the holding element is thus reduced for passage through one of the holes.

In the assembly position, the holding element parts are preferably arranged in alignment with one another along the holding bolt. Preferably they are on one side of the retaining bolt. This orientation minimizes the external cross-section of the support member.

The task formulated at the outset is also achieved by a clamping system with the features of claim 12. The clamping system includes a perforated plate, in particular a perforated table plate, such as a perforated table top of a work table and/or welding table and/or clamping perforated table. In addition, it has a clamping device according to one of the preceding claims. This serves in particular for releasably grasping and/or fixing and/or fastening at least one object on the perforated plate, such as a workpiece, a tool, a fastening device or the like. Such a clamping system with the matching components of clamping device and perforated plate, in particular as a work table, therefore offers all the advantages of simple and safe handling according to the invention.

The object formulated at the beginning is also achieved by a method for handling a clamping device with the steps of claim 13. The method is in connection with a perforated table top, such as a perforated table top of a work table and/or welding table and/or clamping perforated table with at least one

SUBSTITUTE SHEET (RULE 26) Clamping device provided according to the above descriptions. The method is characterized in that the retaining bolt of the clamping device with the retaining element attached thereto and the retaining element parts is passed through one of the holes in the perforated plate in a mounting configuration that fits through the holes in the perforated plate and in a clamping configuration that does not fit through the holes in the perforated plate the perforated plate is clamped. More preferably, the clamping device can be reconfigured from the assembly configuration to the clamping configuration without adding or removing parts, or it is reconfigured accordingly at a given time. In this way, simple and uncomplicated handling of the clamping device is achieved, in particular in combination with a corresponding perforated plate, ie preferably also as a clamping system.

The retaining element parts are preferably each brought into the assembly configuration before being pushed through one of the holes in the perforated plate or before being pulled out of one of the holes in the perforated plate. More preferably, this takes place in that the holding element parts are displaced relative to one another along the longitudinal axis of the holding bolt and/or are rotated about the longitudinal axis of the holding bolt. It can thus be achieved that these are arranged one behind the other along the longitudinal axis of the retaining bolt and/or are aligned with one another. This minimizes the cross section. The clamping device with the retaining bolt and the retaining element parts can thus be easily inserted through a hole both for assembly and for disassembly.

The holding element parts are brought into the clamping configuration in particular with the perforated plate before clamping. More preferably, this is done by rotating the retainer parts about the longitudinal axis of the retainer bolt and/or sliding relative to one another along the longitudinal axis of the retainer bolt to engage with each other and/or assembled to form the retainer in the clamped configuration. In the clamping configuration, the holding element is used for clamping with the perforated plate. All holding element parts in the clamping configuration preferably absorb the clamping forces together. In particular, the holding element parts form a common support surface. A common support surface is provided in particular to form the largest possible surface contact with the perforated plate. Preferably, at least almost the entire circumference of the holding element should be in contact with the perforated plate to absorb the clamping forces. The holding element or the holding elements should preferably be distributed over the circumference with the

SUBSTITUTE SHEET (RULE 26) Perforated plate are in contact, especially in sections and / or evenly. In this way, in particular, one-sided and/or lateral effects of force can be avoided.

A concrete pattern or exemplary embodiment of the clamping devices described here as fastening means is basically only suitable for a specific diameter. However, the clamping devices described here are not limited in terms of diameter. Rather, they can basically be adapted and/or manufactured for any diameter.

A preferred embodiment of the invention is described in more detail below with reference to the figures of the drawing. In this show:

1 shows an exploded view of a clamping device according to the invention, FIG. 2 shows the clamping device in the assembled state with a perforated plate, FIG. 3 shows the clamping device in the assembled configuration and is inserted into the perforated plate, FIG.

5 shows the clamping device during the reconfiguration of the holding element parts by displacement,

6 shows the clamping device in the clamping configuration inserted into the perforated plate, and

Fig. 7 used in the clamping configuration in the clamping device and braced with the perforated plate.

1 shows an exploded view of a clamping device 10 according to the invention. This clamping device 10 is composed of several components.

A clamping bolt or retaining bolt 11 carries one half of the retaining element 12 in the form of a first retaining element part 13. The second retaining element part 14 is located here on a sleeve 15. This sleeve 15 can be pushed onto the retaining bolt 11 in order to hold the two retaining element parts 13 and 14 together to connect to the holding element 12.

Furthermore, a counter-holding element 16 is also shown. This counter-holding element 16 is designed here as a disc. It can be pushed onto the sleeve 15 and thus onto the retaining bolt 11.

SUBSTITUTE SHEET (RULE 26) A nut 17 is provided for screwing onto an end area 18 of the retaining bolt 11 . The thread is not shown here on the end area. This enables clamping of the clamping device 10 . For this purpose, the counter-holding element 16 is braced against the holding element 12 .

In the exemplary embodiment shown, the retaining element parts 13 and 14 are preferably designed or arranged eccentrically to the longitudinal axis of the retaining bolt 11 . They can therefore also be referred to as eccentric parts or eccentric halves. By pivoting the holding element parts 13 and 14 differently, they can be brought into different relative arrangements with respect to one another.

In particular, the exemplary embodiment of the invention described here can absorb forces in the longitudinal direction that are significantly greater than 10 kN.

2 to 7, the clamping device 10 of FIG. 1 is shown in the assembled state. The individual steps involved in handling the clamping device 10 are shown. In particular, the assembly of the clamping device 10 is first described.

2 shows how the clamping device 10 is inserted into a perforated plate 19 and thus clamped. The perforated plate 19 with a hole 20, shown here only in part, can be the table top of a work table, for example.

The tensioner in Figure 2 is in the assembly configuration. This means that the two holding element parts 13 and 14 are aligned with one another. This means that they are arranged on one side, here the left side of the retaining bolt 11 . In this way, the maximum cross-sectional dimension of the retaining element 12 is just small enough for the retaining element 12 to be able to be inserted through the hole 20 with the retaining pin 11 .

This is shown in FIG. The retaining bolt 11 has already been pushed through the hole 20 in the perforated plate 19 . Both retaining element parts 13 and 14 of the retaining element 12 are now located below the perforated plate 19. The counter-retaining element 16 rests on the perforated plate 19 above.

SUBSTITUTE SHEET (RULE 26) An adjustment of the holding element 12 is shown in FIG. 4 . The here upper retaining element part 14 on the sleeve 15 has already been rotated to the right side of the retaining bolt 11. For this purpose, the sleeve 15 on the retaining bolt 11 was rotated about the longitudinal axis of the retaining bolt 11 here.

In the next step in FIG. 5, the two holding element parts 13 and 14 were shifted relative to one another in such a way that a compact holding element 12 is formed. For this purpose, the sleeve 15 was moved down on the retaining bolt 11.

The two holding element parts 13 and 14 are preferably formed in a form-fitting manner with respect to one another. They interlock and lock together.

In this clamping configuration in particular, the holding element parts 13 and 14 form the holding element 12 with a common bearing surface 21 . This bearing surface 21 is used to absorb the clamping forces in contact with the perforated plate 19. In this way, the holding element parts 13 and 14 can absorb the acting forces together. A common support surface 21 can preferably also be formed with more than two holding elements. Preferably, at least almost the entire circumference of the holding element 12 should be in contact with the perforated plate 19 to absorb the clamping forces, at least distributed over the entire circumference, in particular evenly. In this way, in particular, one-sided and/or lateral effects of force can be avoided.

The clamping device 10 is shown in FIG. It can be seen that the two retaining element parts 13 and 14 bear evenly against the perforated plate 19 .

Finally, FIG. 7 shows that the nut 17 was screwed down on the clamping bolt in the direction of the perforated plate 19 . The nut 17 thus presses on the disc-shaped counter-retaining element 16 and thus braces the perforated plate 19 by pulling on the retaining bolt 11 and thus the retaining element 12. The perforated plate 19 is thus clamped between the retaining element 12 with the retaining element parts 13 and 14 on the one hand and the nut 17 with the Counterhold element 16 pressed on the other hand.

To dismantle the clamping device 10, the nut 17 must first be loosened. This is a rearrangement of the holding element parts 13 and 14 of the

SUBSTITUTE SHEET (RULE 26) Clamping configuration into mounting configuration allows. This is necessary in particular in order to be able to pull the holding element 12 out of the hole 20 again. This is only possible in the mounting configuration. In other words, only the steps of FIGS. 2 to 7 must be carried out in the reverse order of assembly for disassembly.

The clamping device 10 itself consists of several parts. It is therefore decomposable. As can be seen in FIG. 1, the counter-retaining element 16 is slipped onto the sleeve 15 . The sleeve 15 itself is pushed onto the retaining bolt 11. The sleeve 15 is slidably and rotatably mounted on the retaining bolt 11 .

A cotter pin 22 can preferably also be provided for fastening the counter-holding element 16 to the sleeve 15 . This split pin 22 can be inserted into a bore 23 of the holding element 16 . The cotter pin 22 preferably protrudes into a slot 24 in the sleeve 15 . Thus, the counter-holding element 16 can be mounted displaceably along the slot 24 relative to the sleeve 15 .

The counter-holding element 16, in particular in the form of a disc, can be connected to the sleeve 15 and/or the retaining bolt 11, in particular as a permanent and/or fixed connection, for example by means of welding. In this way, a particularly solid and/or simple construction of the clamping device 10 can be achieved.

The nut 17 is screwed onto the end area 18 of the retaining bolt 11 in particular. For this purpose, the retaining bolt 11 is preferably provided with a corresponding thread, which is not shown here. By providing this free end of the retaining bolt 11 with a thread, a nut can be screwed on for securing, for example. It is therefore possible to brace against the table.

Accordingly, the clamping device 10 can be dismantled in the reverse order.

SUBSTITUTE SHEET (RULE 26) Reference List

10 clamping device

11 clamping pin 12 retaining element

13 holding element part

14 holding element part

15 sleeve

16 counter-retaining element 17 screw nut

18 end area

19 hole plate

20 hole

21 bearing surface 22 cotter pin

23 bore

24 slotted hole

SUBSTITUTE SHEET (RULE 26)

Claims

patent claims

1. Clamping device for a perforated plate (19), in particular a perforated table plate, such as a work table and/or welding table and/or clamping perforated table, with at least one hole, preferably a large number of identical holes (20), the at least one hole (20) preferably is designed as a bore and/or opening, with a retaining bolt (11) that can be passed through the at least one hole (20) and braced with the perforated plate (19), the retaining bolt (11) having a retaining element (12) and a counter-retaining element (16) , preferably a counter disk, for clamping with the perforated plate arranged in between, characterized in that the holding element (12) has a mounting configuration for passing through a hole (20) in the perforated plate (19) and a clamping configuration for clamping with the perforated plate (19). .

2. Clamping device according to Claim 1, characterized in that the holding element (12) has a plurality of holding element parts (13, 14), preferably two holding element parts (13, 14), more preferably, the assembled holding element parts (13, 14) in the clamping configuration forming the holding element (12) and/or wherein the holding element (12) is composed of the holding element parts (13, 14) in the clamping configuration.

3. Clamping device according to claim 1 or 2, characterized in that the holding element (12) can be adjusted between several, in particular two, states, preferably between the assembly configuration and the clamping configuration, more preferably by pivoting and/or displacing the holding element parts (13, 14) relatively to each other.

4. Clamping device according to one of the preceding claims, characterized in that the holding element (12) together with the holding bolt (11) in the assembled configuration has an overall diameter which is smaller than the hole diameter of the perforated plate (19), and/or that the holding element (12) together with the retaining bolt (11) in the clamping configuration has an overall diameter which is larger than the hole diameter of the perforated plate (19).

5. Clamping device according to one of the preceding claims, characterized in that the holding element parts (13, 14) on a common longitudinal axis,

SUBSTITUTE SHEET (RULE 26) preferably a longitudinal axis or central longitudinal axis of the retaining bolt (11), are preferably displaceable and/or rotatable and/or pivotable along the longitudinal axis.

6. Clamping device according to one of the preceding claims, characterized in that the holding element parts (13, 14) are preferably shaped to correspond to one another and/or that the holding element parts (13, 14) are shaped in a form-fitting manner to one another and/or can be assembled and/or that the holding element parts (13, 14) are locked to one another in the clamping configuration or are firmly engaged with one another for common load bearing, and/or that the holding element parts (13, 14) are supported on one another under tensile load and/or in the clamping configuration.

7. Clamping device according to one of the preceding claims, characterized in that the holding element parts (13, 14) are each individually asymmetrical or eccentric to the longitudinal axis of the holding bolt (11), preferably as a circular segment-shaped and / or semi-circular projection and / or that the holding element parts ( 13, 14) are designed as eccentric halves, preferably eccentric to the longitudinal axis.

8. Clamping device according to one of the preceding claims, characterized in that one of the holding element parts (13, 14) is firmly connected to the holding bolt (11), preferably permanently and/or detachably, for example by a screw connection, in particular a secured screw connection, and/or that the retaining bolt (11) has a thread and a corresponding nut as a counter-retaining element (16) for the retaining element (12), wherein the retaining bolt (11) with the counter-retaining element (16) can be clamped against the lower retaining element by screwing.

9. Clamping device according to one of the preceding claims, characterized in that one of the holding element parts (13, 14) is mounted in the manner of a sleeve on the retaining bolt (11), in particular by means of a sleeve (15) for plugging onto the retaining bolt (11), the sleeve ( 15) is preferably longitudinally displaceable along and/or rotatable about the longitudinal axis of the retaining bolt (11).

SUBSTITUTE SHEET (RULE 26) 14

10. Clamping device according to one of the preceding claims, characterized in that the outer contour of the holding element (12) in the clamping configuration is at least essentially symmetrical to the longitudinal axis of the retaining bolt (11), wherein preferably a bearing surface (21) is at least essentially circular , in particular a bearing surface (21) for the edge of the hole (20), and / or that the outer contour of the retaining element (12) in the assembly configuration is asymmetrical to the longitudinal axis of the retaining bolt (11).

11. Clamping device according to one of the preceding claims, characterized in that the holding element parts (13, 14) are arranged in the assembled position aligned with one another along the retaining bolt (11), preferably on one side of the retaining bolt (11).

12. Clamping system with a perforated plate (19), in particular a perforated table plate, such as a perforated table plate of a work table and/or welding table and/or clamping perforated table, and with a clamping device (10) according to one of the preceding claims, in particular for releasably gripping and/or fixing and/or attaching at least one object to the perforated plate (19), such as a workpiece, a tool, a fastening device or the like.

13. Method for handling a clamping device for a perforated table top (19), such as a perforated table top of a work table and/or welding table and/or clamping perforated table with at least one clamping device (10) according to one of claims 1 to 11, characterized in that the retaining bolt ( 11) the clamping device (10) with the holding element (12) attached thereto and the holding element parts (13, 14) in an assembly configuration which fits through the holes (20) in the perforated plate (19) through one of the holes (20) in the perforated plate (19 ) is passed through and clamped to the perforated plate (19) in a clamping configuration that does not fit through the holes (20) of the perforated plate (19), the clamping device (10) preferably being reconfigurable from the assembly configuration to the clamping configuration without adding or removing parts .

14. The method according to claim 13, characterized in that the holding element parts (13, 14) before being pushed through one of the holes (20) in the perforated plate (19) or before being pulled out of one of the holes (20) in the perforated plate (19). are brought into the assembly configuration, preferably by the

SUBSTITUTE SHEET (RULE 26) 15

Retaining element parts (13, 14) are displaced relative to one another along the longitudinal axis of the retaining bolt (11) and/or rotated about the longitudinal axis of the retaining bolt (11) in order to be arranged one behind the other along the longitudinal axis of the retaining bolt (11) and/or in order to be connected to one another cursed.

15. The method according to claim 13 or 14, characterized in that the retaining element parts (13, 14) are brought into the clamping configuration before being clamped to the perforated plate (19), preferably by rotating the retaining element parts (13, 14) about the longitudinal axis of the retaining bolt ( 11) are rotated and/or displaced relative to one another along the longitudinal axis of the retaining bolt (11) in order to be brought into engagement with one another and/or to form the retaining element (12) when assembled.

SUBSTITUTE SHEET (RULE 26)