Tongue clip of a clip closure and clip closure for a switch actuating system

Abstract

The present disclosure relates to a tongue piston of a clamp lock for a switch operating system and to a clamp lock for a switch operating system with such a tongue piston.The tongue piston comprises a tongue block body with two vertically extending and adjacent webs which are connected to one another via a connecting region and form a receiving space between them for a fastening eye of a locking clip, wherein the tongue block body has a horizontal receiving slot in the connecting region for receiving a foot of an adjusting tongue and in the webs two receiving openings which are aligned horizontally with one another along an alignment direction for receiving an eccentric bolt, and wherein the tongue block has on at least one of the two webs at its receiving opening a recess which extends radially to the alignment direction and over part of the circumference of the receiving opening for partially receiving at least one flange of a fastening nut of the eccentric bolt.

Description

BACKGROUND OF THE INVENTION Technical area

[0001] The present invention relates to a tongue block of a clamp closure for a switch operating system and to a clamp closure for a switch operating system with such a tongue block. Description of the state of the art

[0002] In a switch-setting system, two switch blades are moved depending on the specified direction of travel so that one of the two switch blades is in contact with the corresponding stock rail, while the other switch blade is at a suitable distance, known as the switch blade contact, from the other stock rail. The simultaneous control of the switch locking devices in a switch-setting system is achieved via a slide rod, which interacts with locking clamps to open or lock the switch locking device.

[0003] In a vertical clamp closure, the closure clamp pivots around a horizontal axis on a tongue clamp. The tongue clamp is also connected to the adjusting tongue via a screw fastening.

[0004] In order to be able to precisely adjust the individual components of a switch setting system as described above and to compensate for potential wear and tear, it is known in the prior art, for example from EP 2 591 972 A2, to pivotally fasten the locking clamp to the tongue block via an eccentric bolt.

[0005] The use of an eccentric bolt requires that the stroke of the eccentric bolt can be adjusted and fixed in graduated steps using a suitable adjustment element, such as a shim. The precise position of the adjusting tongue relative to the tongue clamp is also adjustable.

[0006] In order to be able to check these adjustment components during operation and readjust them if necessary, they must be easily accessible.

[0007] However, this is often not easily possible due to the extremely limited space available for the adjustment components. Due to this difficult access to the adjustment components and the limited working area, it is often laborious to adjust, for example, the stroke of the eccentric bolt. This can sometimes also require the manufacture and use of special tools, which negatively impacts user-friendliness and the time required for maintenance and / or readjustment.

[0008] In addition, high safety standards must be met. These include, among other things, ensuring that the adjustment components in the tongue clamp area cannot come loose on their own.

[0009] For this reason, a solution is sought to increase the user-friendliness of setting and / or readjusting a clamp lock under very confined space conditions while ensuring high operational reliability of a switch setting system.

[0010] From EP 1 020 341 B1 and EP 2 591 972 A2, only securing elements for a tongue block of a clamp lock for a switch operating system are known to date. These securing elements, for example, use a securing cap formed from a metal plate to secure the screw connecting the control tongue to the tongue block against self-loosening, thus increasing operational reliability. However, problems that arise due to the prevailing limitations of the installation space during adjustment and / or readjustment have not yet been addressed, so the user-friendliness of such tongue blocks of a clamp lock still requires improvement. PRESENTATION OF THE INVENTION

[0011] The invention is based on the object of proposing a tongue block of a clamp lock for a switch operating system and a clamp lock for a switch operating system with such a tongue block, which ensure a high operational reliability of the switch operating system even under high mechanical load and a very long service life of the switch operating system with a configuration that is as simple and therefore cost-effective as possible and at the same time increases the user-friendliness when setting and / or readjusting the clamp lock under confined space conditions.

[0012] This object is achieved by a tongue clamp of a clamp closure for a switch operating system having the features of claim 1 and / or by a clamp closure for a switch operating system having the features of claim 8. Preferred embodiments emerge from the dependent claims.

[0013] According to one aspect of the present invention, the tongue block of a clamp closure for a switch operating system comprises a tongue block body.

[0014] The tongue clamp body has two vertically extending webs that run side by side, particularly parallel to each other. The webs of the tongue clamp body are connected to each other via a connecting area, thus forming a receiving space between them for a fastening eye of a locking clip.

[0015] The tongue clamp body further has a horizontal receiving slot in the connection area. This receiving slot is designed to accommodate the base of an adjusting tongue.

[0016] The tongue clamp body also has two receiving openings in the webs that are horizontally aligned along a straight line. These receiving openings are designed to accommodate an eccentric bolt.

[0017] A recess is provided at the receiving opening of at least one of the two webs. The recess extends radially to the alignment direction and over part of the circumference of the receiving opening. The recess is designed to partially or completely accommodate at least one flange of a fastening nut of the eccentric bolt.

[0018] By allowing at least the flange of the eccentric bolt's fastening nut to be accommodated in the recess on the tongue block, the described configuration of the tongue block creates an axial limitation of the fastening nut's range of motion in two directions. In other words: the axial range of motion of the fastening nut on the eccentric bolt is limited in both axial directions when the eccentric bolt is being fixed and loosened, for example, to set or adjust the eccentric bolt's stroke. Thus, particularly when loosening the fastening nut, the interaction of the flange and recess creates an axial blockage of further movement of the fastening nut, with the aim of being able to move the eccentric bolt in a direction opposite to the loosening direction of the fastening nut after the flange of the fastening nut has come into contact with the recess.Such a configuration eliminates the need for an additional tool, such as a hammer, to adjust the axial position of the eccentric bolt. On the contrary, the provision of a recess as described above allows for the axial position of the eccentric bolt to be manipulated by applying a rotational force to the fastening nut when loosening it, after the flange of the fastening nut has contacted an edge of the recess. Accordingly, even in tight spaces, the adjustment of the eccentric bolt's stroke can be achieved simply and in a particularly user-friendly manner using such a tongue clamp.

[0019] In the present context, it should be noted that the terms "vertical" and "horizontal" used primarily describe the orientation and alignment of certain elements and components of the switch block or clamp lock for a switch operating system relative to one another, but are not limited to a specific position in the Earth's gravitational field or any other reference system. These terms are also to be understood to include moderate deviations from a vertical or horizontal direction or plane, so that the description in this context should not be interpreted restrictively. Thus, the terms "vertical" and "horizontal" can also be understood throughout the text as "essentially vertical" or "essentially horizontal," respectively, with deviations of, for example, ± 5° each.

[0020] Preferably, the recess is formed integrally with the tongue clamp body.

[0021] This makes it possible to reduce the number of required parts and eliminate the risk of loose connecting elements between the switch block body and the recess, for example, due to vibrations. This further increases the operational reliability of the switch setting system, even under high mechanical stress and over very long periods of use.

[0022] The recess may be milled into the tongue block body, for example, using a dovetail cutter to form a pocket in the tongue block body that is configured to partially receive the flange of the fastening nut.

[0023] In the case of an integral formation of the recess with the tongue clamp body, it is preferred that the recess has a lateral insertion opening over part of the circumference of the receiving opening. The fastening nut can be received through this lateral insertion opening.

[0024] This allows for particularly simple and reliable installation of the fastening nut on the eccentric bolt, while simultaneously preventing the nut from completely detaching from the eccentric bolt. Furthermore, the installation space required for the tongue clamp can be kept as compact as possible.

[0025] As an alternative to the integral formation of the recess with the tongue block body, the recess can be formed at least partially or entirely by means of a plate. Such a plate is attached, in particular screwed, to the tongue block body.

[0026] Such a configuration allows conventional, commercially available tongue clamp configurations to be further developed by attaching such a plate, thus also harnessing the effects and advantages described above. Furthermore, the tongue clamp body can be manufactured as cost-effectively as possible.

[0027] If the pocket is formed at least partially or completely by means of a plate, the above-described lateral insertion opening can be omitted over part of the circumference of the receiving opening, if necessary, which increases the stability of the plate on the tongue clamp body. Furthermore, machining and manufacturing costs can be reduced due to the lower complexity of the tongue clamp body's geometry. Furthermore, during use of the tongue clamp, access to the fastening nut, for example, for replacing it, is quick and easy by disassembling, in particular unscrewing, the plate from the tongue clamp body.

[0028] The plate is preferably made of plastic, brass or bronze.

[0029] Plastic can be used to create a particularly cost-effective, wear- and weather-resistant design with a long service life. However, other materials can also be used to achieve comparable advantages. Brass or bronze, for example, are characterized by good sliding properties and wear- and weather-resistant material properties, so the plate can also be made of brass or bronze.

[0030] Preferably, the tongue clamp body has two vertically aligned bores in the connecting area. These are designed to accommodate a tongue fastening screw.

[0031] Preferably, the tongue clamp body has two horizontally aligned bores in the webs for receiving a catch bolt.

[0032] This makes it possible to prevent a slide rod below the locking clamp from moving downwards by incorporating a catch bolt.

[0033] According to a further aspect of the present invention, a clamp closure for a switch control system is provided, which has a tongue block according to one of the preceding aspects.

[0034] The clamp closure also has an eccentric bolt, a locking clamp and a fastening nut.

[0035] The eccentric bolt is mounted in the tongue block body via the receiving openings of the webs of the tongue block body. The eccentric bolt itself has an eccentric region relative to its axial extension, which is located between the webs of the tongue block body. This means that the eccentric bolt is mounted axially parallel in the receiving openings of the webs of the tongue block body. The eccentric region located between them is characterized by a central axis that deviates from the axis running through the receiving openings, i.e., a parallel longitudinal axis.

[0036] The locking clip has a mounting eyelet. The locking clip is connected to the tongue clamp body via the eccentric portion of the eccentric bolt. In other words, the eccentric bolt connects the locking clip relative to the tongue clamp, while simultaneously allowing the position of the locking clip to be adjusted by means of the stroke of the eccentric portion of the eccentric bolt.

[0037] The fastening nut is screwed to the eccentric bolt to fix the axial position of the eccentric bolt. This means that after adjusting the stroke of the eccentric bolt and thus the position of the locking clamp relative to the tongue block, the fastening nut primarily serves to fix the axial position of the eccentric bolt in or on the tongue block in the clamp closure arrangement. For this purpose, the fastening nut, in particular the flange of the fastening nut, extends at least partially or completely into the recess in the receiving opening of the web of the tongue block.

[0038] The recess is preferably designed to limit the axial movement of the fastening nut on the eccentric bolt in a direction away from the tongue block body. Specifically, the axial movement is limited to such an extent that complete unscrewing of the fastening nut from the eccentric bolt without axially moving the eccentric bolt is impossible. While the fastening nut can in principle be unscrewed from the eccentric, the screwing movement of the fastening nut is redirected by the recess into an axial movement of the eccentric from a position on the eccentric that depends on the dimensions of the fastening nut and the recess.

[0039] This maintains a high level of operational reliability while simultaneously improving user-friendliness, for example when adjusting the stroke of the eccentric bolt to readjust the position of the locking clamp in tight installation spaces.

[0040] Preferably, the fastening nut is a flange nut, the flange of which is at least partially received within the recess and limits an axial range of movement of the fastening nut by abutting against the axial edges of the recess.

[0041] Preferably, the recess is designed to allow at least partial placement of the fastening nut or its flange in an undercut of the tongue block. Complete placement of the fastening nut or its flange in an undercut of the tongue block is also possible.

[0042] Such a configuration makes the design of an undercut advantageously usable. By arranging at least the flange of the fastening nut at least partially in the undercut, it is possible to prevent the fastening nut from being completely released from the eccentric bolt without axially moving the eccentric bolt. In other words, it is possible to prevent the fastening nut from being completely unscrewed from the eccentric bolt without axially moving the eccentric bolt.

[0043] Furthermore, such an undercut allows the fastening nut to initially move freely within an axial range of motion, i.e., within a cavity extending in the axial direction of the eccentric bolt, for example, when loosening the fastening nut away from the tongue block body, even if this is not necessary. As the screw connection is further loosened, the surface of the fastening nut flange oriented away from the tongue block can strike the edge of the undercut further axially removed from the center of the tongue block body, which edge is either integral or, for example, in the form of the plate described above or as another resistance.When this occurs, further rotation of the fastening screw screwed onto the eccentric bolt causes the eccentric bolt to move along its axial extent and opposite to the loosening direction of the fastening screw.

[0044] This also allows the axial position of the eccentric bolt to be adjusted, for example, to adjust the stroke of the eccentric bolt in a defined axial position, simply by turning the fastening screw, without the need for any additional tools. This means that the axial position of the eccentric bolt in the clamp closure is fixed or loosened simply by rotating the fastening screw in conjunction with the recess and the tongue clamp, without requiring any additional tools other than a wrench for the fastening screw or a large amount of free space around the axial ends of the eccentric bolt.

[0045] Preferably, in the above-described embodiments of the clamp closure, a part of the fastening nut projects in the axial direction of the eccentric bolt away from the tongue clamp body.

[0046] This means that the fastening nut is easily accessible at any time and can be directly manipulated using a wrench such as an open-end wrench or ring spanner in order to fix the axial position of the eccentric bolt in the clamp closure or to loosen it for adjustment and maintenance work.

[0047] The above-described embodiments can also be provided with a locking plate, as known from EP 2 591 972 A2, to further increase operational reliability. This is characterized in particular by the fact that it not only surrounds the upper region of the tongue block body, in which the receiving slot for receiving a foot of an adjusting tongue is provided, but also protects the two webs along their essentially vertical extension from environmental and weather influences. SHORT DESCRIPTION OF THE CHARACTERS

[0048] The invention is described below purely by way of example with reference to the accompanying figures, in which Fig. 1 shows an exploded view of a tongue block and associated components of a clamp closure for a switch setting system, Fig. 2 shows the clamp closure for a switch setting system according to Figure 1in an assembled state, Fig. 3 shows the clamp closure for a switch setting system according to Figure 1 with a modification of the recess. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0049] In the following figures, the same components are designated by the same reference numerals.

[0050] In Fig. 1 a tongue block 10 is shown as well as some components connected to the tongue block 10, which are explained in more detail below and which together form a clamp closure 11 for a switch setting system.

[0051] Specifically, the clamp closure 11 comprises the tongue clamp 10, a closure clamp 18, an eccentric bolt 22 and a fastening screw 28 screwed to an axial end of the eccentric bolt.

[0052] The tongue clamp 10 comprises a tongue clamp body 13 and is preferably designed as a cast part.

[0053] As the isometric exploded view of Figure 1 can be seen, the tongue block body 13 extends substantially in a horizontal and vertical direction, so that the appearance of the exemplary embodiment of the tongue block body 13 corresponds to the basic shape of the letter L.

[0054] The tongue block body 13 essentially has two vertically extending and parallel webs 14, which are connected to each other via a connecting region 15. In the illustrated embodiment, the connecting region 15 forms the upper region of the tongue block body 13, and the two webs 14 extend therefrom essentially vertically downward.

[0055] As in Figure 1As illustrated, a catch bolt 46 is provided at the lower end of the webs 14, i.e., at the lower end of the webs 14 in the vertical direction. To accommodate this bolt, the tongue block body 13 has two horizontally aligned catch bolt receiving bores 19. The catch bolt 46 is received therein and secured against axially falling out or loosening by means of a catch bolt screw 48. The catch bolt 46 has the function of enclosing the slide rod present in a conventional switch setting system below the locking clamp 18, so that the tongue block 10 cannot be moved upwards out of engagement with the slide rod.

[0056] As in Figure 1Also shown, in the upper area of ​​the tongue clamp body 13, here at the connecting area 15, there is a receiving slot 12 for the base of a not shown adjusting tongue. On both sides of the receiving slot 12, vertically aligned holes 16 are provided for receiving a Figure 1 not shown tongue fastening screw 17 in the tongue clamp body 13. The longitudinal axis of the Figures 2 and 3 The tongue fastening screw 17 shown is essentially vertical in the installed position, ie in the described reference position, of the tongue clamp 10 on a setting tongue.

[0057] The locking clip 18 has a fastening eye 20, by means of which the locking clip 18 can be fastened in a receiving space 21 between the two webs 14 on the tongue block 10. For this purpose, the tongue block body 13 has two receiving openings 23 in the webs 14, which are aligned horizontally along an alignment direction F. These receiving openings 23 serve to accommodate the eccentric bolt 22 via two bearing shells 25 for fastening the locking clip 18 to the tongue block 10. The eccentric bolt 22, which is mounted in the tongue block body 13 by the receiving openings 23 and the bearing shells 25, has an eccentric region 24 relative to its longitudinal axis. The central axis, i.e. the longitudinal axis, of the eccentric region 24 differs from the longitudinal axis of the two regions of the eccentric bolt 22 accommodated in the bearing shells 25.The eccentric bolt 22 passes through the fastening eye 20 of the locking clamp 18 and can be used with its eccentric area 24, which is provided between the webs 14 of the tongue clamp body, to adjust the locking clamp 18 by a targeted rotation.

[0058] A fastening nut 28, which is preferably self-locking, serves to axially fix the eccentric bolt 22. It can be engaged with an external thread provided at the axial end of the eccentric bolt 22 to fix the axial position of the eccentric bolt 22 in the tongue block 10. This means that by screwing the fastening nut 28 onto the eccentric bolt 22 against the tongue block body 13, at least the axial position of the eccentric bolt 22 can be fixed. In the illustrated embodiments, the fastening nut 28 is a flange nut with a circular flange 31 projecting radially.

[0059] The head 38 of the eccentric bolt 22 is provided at the axially opposite end of the axial end of the eccentric bolt 22, which is provided with the fastening nut 28. An adjusting disc 34, which is provided with a keyhole-shaped opening 36, is positively attached to the head 38 of the eccentric bolt 22. The essentially round part of the keyhole-shaped opening 36 serves to be inserted over the head 38 of the eccentric bolt 22. A subsequent axial displacement of the adjusting disc 34 out of the substantially circular region of the opening 36 fixes the adjusting disc 34 in a form-fitting manner in cooperation with a groove provided on the eccentric bolt 22, so that the adjusting disc 34, which can also be understood as a locking disc, is fixed to the eccentric bolt 22 in the axial direction of the eccentric bolt 22 and can only be rotated together with the eccentric bolt 22 about the longitudinal axis of the eccentric bolt 22.The adjusting disc 34 is provided with a number of pin openings 42 which, in the installed position, are brought into engagement with a fixing pin (not shown) provided on the tongue clamp body 13 in order to prevent rotation of the adjusting disc 34 and the eccentric bolt 22 which is positively connected thereto.

[0060] The Figures 1 , 2 and 3 show furthermore that a pocket-like recess 30 is provided on one of the webs 14 of the tongue block body 13 in the region of the receiving opening 23 on the tongue block 10. This recess extends radially to the alignment direction F and over a part of the circumference of the receiving opening 23. As in Figure 1 As illustrated, the recess 30 is thus arranged directly at the receiving opening 23, wherein in the region of the receiving opening 23 in the tongue block body no material of the tongue block body 13 is provided to form the recess 30.

[0061] The recess 30 deliberately extends only partially over the circumference of the receiving opening 23 in order to partially accommodate the flange 31 of the fastening nut 28 on the eccentric bolt 22. In order to facilitate the insertion of the fastening nut 28 into the recess 30 during assembly, in which the eccentric bolt 22 is screwed to the fastening nut 28, the recess 30 has a lateral insertion opening 33, which is optional in embodiments with a plate 35 described in more detail below. This can extend partially over the circumference of the receiving opening 23. As can be seen in this regard from Figure 1 As can be seen, the recess 30 together with the lateral insertion opening 33 forms, for example, a U-shaped pocket in the tongue clamp body 13.

[0062] Like the Figures 2 and 3As can be further seen in this regard, the recess 30 is designed such that the flange 31 of the fastening nut 28, after the fastening nut 28 has been inserted laterally via the lateral insertion opening 33, is "caught" in the recess 30 in the assembled state. The area of ​​the fastening nut 28 that can be engaged with a wrench protrudes from the recess 30 in the axial direction of the eccentric bolt 22, away from the tongue block body 13. Thus, although the fastening nut 28 is provided or "caught" in the recess 30 of the tongue block 10, the screwing position of the fastening nut 28 on or relative to the eccentric bolt 22 can be changed and adjusted at any time.

[0063] The recess 30 itself is designed in such a way that it limits the axial movement of the fastening nut 28 by accommodating its flange 31. For this purpose, according to the Figure 1 and2 illustrated embodiment, the recess 30 is at least partially formed by means of a plate 35 which is fastened to the tongue clamp body 13. For fastening the plate 35 to the tongue clamp body, in the embodiment of Figure 1 and 2 three plate fastening screws 37 are provided. The plate 35 itself is, due to its advantageous corrosion resistance, in the Figures 1 and 2 The embodiment shown is made of plastic.

[0064] Via the plate 35 on the recess 30, the flange 31 can be received in the recess 30 in such a way that the flange is located in an undercut and, as described above, is "trapped" therein. The recess 30, in particular the plate 35, ensures that the axial movement range along the alignment direction F of the fastening nut 28 on the eccentric bolt 22 in a direction away from the tongue block body 13 is limited to such an extent that complete unscrewing of the fastening nut 28 from the eccentric bolt 22 without axially moving the eccentric bolt 22 itself is impossible, since the flange 31 abuts the plate 35 during unscrewing. Accordingly, complete detachment of the fastening nut 28 from the eccentric bolt 22 can be ruled out.

[0065] On the other hand, the design of the recess 30 ensures that the fastening nut 28 can only be moved within a limited axial range of motion up to the plate 35. Specifically, until it comes into contact with the inside of the plate 35, i.e., the side of the plate 35 facing the tongue block body 13, during the unscrewing process. Consequently, the contact of the flange 31 of the fastening nut 28 with the plate 35 of the recess 30 ensures that the axial position of the eccentric bolt 22 can be moved by applying further rotational force to the fastening nut 28, for example, via a wrench.When the eccentric bolt 22 has been driven sufficiently far along the alignment direction F out of the tongue block body 13 that the relevant pin opening 42 of the adjusting disc 34 is no longer in engagement with the fixing pin, the stroke of the eccentric bolt 22 can be adjusted quickly and easily even when there is little installation space in the switch setting system.

[0066] As an alternative to the plate design described above, Figures 1 and 2 can, as in Figure 3 As illustrated, the recess 30 can also be formed integrally with the tongue clamp body 13 and thus without the separate plate 35. In other words: The function of the plate 35 is in the embodiment according to Figure 3This is achieved solely by the integrally formed recess 30 of the tongue block body 13. This recess 30 can, for example, be formed in the form of a pocket by machining, in particular by milling or the like, in the tongue block body 13 in order to achieve the above-described undercut for the flange 31 of the fastening nut 28 and the associated effects and advantages. LIST OF REFERENCE SYMBOLS Tongue clamp 10 Staple closure 11 Recording slot 12 tongue clamp body 13 web 14 Connection area 15 drilling 16 Tongue fastening screw 17 locking clip 18 Catch bolt mounting hole 19 Mounting eye 20 recording room 21 Eccentric bolt 22 Receiving opening 23 Eccentric range 24 bearing shell 25 fastening nut 28 recess 30 flange 31 side insertion opening 33 Adjusting disc 34 Plate 35 keyhole-shaped opening 36 Plate fixing screw 37 Head 38 pin opening 42 Catch bolt 46 Catch bolt screw 48 Escape direction F

Claims

1. A tongue block (10) of a clamp closure (11) for a switch control system, comprising: a tongue block body (13) with two vertically extending and adjacent webs (14), which are connected to one another via a connecting region (15) and form a receiving space (21) between them for a fastening eye (20) of a closure clamp (18), wherein the tongue block body (13) has a horizontal receiving slot (12) in the connecting region (15) for receiving a foot of an adjusting tongue and two receiving openings (23) in the webs (14) which are aligned horizontally along an alignment direction (F) and for receiving an eccentric bolt (22),and wherein the tongue block (10) has on at least one of the two webs (14) at its receiving opening (23) a recess (30) extending radially to the alignment direction (F) and over part of the circumference of the receiving opening (23) for partially receiving at least one flange (31) of a fastening nut (28) of the eccentric bolt (22).

2. Tongue clamp (10) according to claim 1, wherein the recess (30) is formed integrally with the tongue clamp body (13).

3. Tongue clamp (10) according to claim 2, wherein the recess (30) has a lateral insertion opening (33) over a part of the circumference of the receiving opening (23), via which the fastening nut (28) can be received.

4. Tongue clamp (10) according to claim 1, wherein the recess (30) is formed at least partially by means of a plate (35) which is fastened, in particular screwed, to the tongue clamp body (13).

5. Tongue clamp (10) according to claim 4, wherein the plate (35) is made of plastic, brass or bronze.

6. Tongue clamp (10) according to one of the preceding claims, wherein the tongue clamp body (13) has two vertically aligned bores (16) in the connecting region (15) for receiving a tongue fastening screw (17).

7. Tongue clamp (10) according to one of the preceding claims, wherein the tongue clamp body (13) has two horizontally aligned catch bolt receiving bores (19) in the webs (14) for receiving a catch bolt.

8. A clamp closure (11) for a switch control system, comprising: a tongue block (10) according to one of the preceding claims; an eccentric bolt (22) which is mounted in the tongue block body (13) by means of the receiving openings (23) and which, relative to its axial extent, has an eccentric region (24) which is provided between the webs (14); a closure clamp (18) with a fastening eye (20) by which the closure clamp (18) is connected to the tongue block body (13) via the eccentric region (24) of the eccentric bolt (22); a fastening nut (28) which is screwed to the eccentric bolt (22) to fix an axial position of the eccentric bolt (22) and extends at least partially into the recess (30) at the receiving opening (23) of the web (14).

9. Clamp closure (11) according to claim 8, wherein the recess (30) is designed such that it limits an axial range of movement of the fastening nut (28) on the eccentric bolt (22) in a direction away from the tongue clamp body (13) such that a complete unscrewing of the fastening nut (28) from the eccentric bolt (22) without axially moving the eccentric bolt (22) is excluded.

10. Clamp closure (11) according to claim 8 or 9, wherein the recess (30) is designed such that it enables at least partial arrangement of the fastening nut (28) on the eccentric bolt (22) in an undercut of the tongue clamp (11).

11. Clamp closure (11) according to claim 10, wherein the fastening nut (28) is a flange nut whose flange (31) in the recess (30) limits an axial range of movement of the fastening nut (28).

12. Clamp closure (11) according to one of claims 8 to 11, wherein a part of the fastening nut (28) projects in the axial direction of the eccentric bolt (22) away from the tongue clamp body (13).

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