A wire rope connection lock with multiple ends

Abstract

The present invention relates to the technical field of wire rope lock buckles, and discloses a wire rope connection lock buckle with multiple heads, including a card plate, a slide groove is symmetrically opened on the top of the card plate, a movable plate is symmetrically arranged above the slide groove, and a slider matched with the slide groove is fixedly installed on the bottom of the movable plate. The present invention sets a limit plate so that when squeezing the wire rope, the wire rope can be limited so that the two sections of the wire rope will not be staggered, ensuring that the two sections of the wire rope can be vertically squeezed, thereby improving the squeezing effect between the two sections of the wire rope, and adjusting the spacing between the limit plates so that the entire lock buckle can adapt to the connection of wire ropes of different thicknesses, which is equivalent to a lock buckle that can be transformed into multiple lock buckles to form a multi-head lock buckle to meet the use requirements. During use, the ball can be protected in conjunction with a closing component to prevent the ball from rusting and affecting the subsequent reuse of the entire lock buckle.

Description

Technical Field

[0001] The invention belongs to the technical field of wire rope lock buckles, and in particular relates to a wire rope connection lock buckle with multiple ends. Background Art

[0002] Wire rope is a spiral bundle of steel wires twisted together according to certain rules with steel wires that meet the requirements of mechanical properties and geometric dimensions.

[0003] When the wire rope is in use, when it is necessary to bend the wire rope to form a ring at one end thereof, it is necessary to cooperate with the lock buckle to fix the two sections of the bent wire rope. When the existing lock buckle is in use, the two sections of the bent wire rope are placed on the pallet, and the U-bolt is passed through the pallet and tightened until the wire rope is flattened by about 1 / 3. Since the wire rope is deformed after being stressed, the U-bolt must be tightened a second time after the wire rope is stressed to ensure the firmness of the joint, and finally the two sections of the wire rope can be squeezed tightly. However, when used for thin wire rope, when the U-bolt cooperates with the pallet to squeeze the wire rope, there is a large gap between the two sections of the wire rope and the pallet. During squeezing, space is given to the wire rope to move in the left and right directions, which makes it easy to stagger during the squeezing process, resulting in the two sections of the wire rope cannot be squeezed tightly, affecting subsequent use.

[0004] Therefore, it is necessary to invent a wire rope connection lock with multiple ends to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a wire rope connection lock buckle with multiple ends to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a wire rope connecting lock with multiple heads, comprising a card plate, the top of the card plate is symmetrically provided with a slide groove, the top of the slide groove is symmetrically provided with a moving plate, the bottom of the moving plate is fixedly installed with a slider cooperating with the slide groove, the slide groove is provided with a driving component for driving the slider to move, the inner side of the moving plate is provided with a vertical groove, the bottom of the vertical groove is connected with the outside, a limit plate is slidably installed between two opposite vertical grooves, the inner side of the limit plate is flush with the inner side of the moving plate, the top of the card plate is symmetrically provided with an opening, support plates are equidistantly arranged in the opening, the outer side of the support plate is provided with a supporting component for supporting it, the top of the card plate is symmetrically provided with circular holes, a U-shaped buckle is inserted between the two circular holes, and a nut is threadedly connected to the bottom of the U-shaped buckle.

[0007] Furthermore, the support assembly includes transverse plates symmetrically fixedly installed on both sides of the support plate, both sides of the card plate are provided with movable openings connected to the openings, the transverse plate extends into the movable opening, the thickness of the transverse plate is consistent with the thickness of the support plate and the limit plate, an extension plate corresponding to the transverse plate is fixedly installed on the outer side of the card plate, the extension plate and the bottom wall of the movable opening are provided with a connected movable groove, a movable block is slidably arranged in the movable groove, a top plate is fixedly installed on the top of the movable block, the side of the movable block away from the support plate is fixedly connected to the inner wall of the movable groove by a spring, a ball groove is provided on the top of the top plate, a ball is arranged in the ball groove, the ball contacts the transverse plate, a closing assembly for closing the ball is provided on the outer side of the top plate, and a pulling structure for driving the top plate to move outward is provided on the outer side of the movable plate.

[0008] Furthermore, the pulling structure is specifically configured as an L-shaped magnet, the pulling structure is fixed to the outside of the movable plate, the thickness of the pulling structure is consistent with the thickness of the limiting plate, the inner side of the pulling structure is flush with the inner side of the limiting plate, and the material of the top plate is iron.

[0009] Furthermore, the closing assembly includes side panels symmetrically fixedly mounted on the outside of the top panel, a rotating shaft rotatably mounted between a pair of the side panels, an external fixed sleeve of the rotating shaft is provided with a connecting plate, the external part of the connecting plate is fixedly connected with a cover plate for sealing the ball bearing, both ends of the rotating shaft extend to the outer sleeve of the side panels and are provided with torsion springs, both ends of the torsion spring are respectively fixedly connected to the side panels and the rotating shaft, and when not in use, the cover plate is in conflict with the cross plate.

[0010] Furthermore, the driving assembly includes a screw rod rotatably installed in the slide groove, the slider is threadedly sleeved outside the screw rod, the threads on both sides of the screw rod are arranged in opposite directions, one end of the screw rod extends outside the slide groove and is fixedly connected to a sprocket, the two sprockets are connected by a chain belt, and a rotating block is fixedly installed on the middle part of the outer side of the sprocket on one side.

[0011] Furthermore, the size of the limiting plate is adapted to the size of the opening.

[0012] Furthermore, the limiting plate and the movable plate are made of steel.

[0013] Furthermore, the distance between the pulling structure and the top plate is sufficient to allow the top plate to move to be separated from the horizontal plate.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention sets a limit plate so that when squeezing the steel wire rope, the steel wire rope can be limited, so that the two sections of the steel wire rope will not be staggered, ensuring that the two sections of the steel wire rope can be vertically squeezed, thereby improving the squeezing effect between the two sections of the steel wire rope. By adjusting the spacing between the limit plates, the entire lock buckle can adapt to the connection of steel wire ropes of different thicknesses, which is equivalent to one lock buckle being able to transform into multiple lock buckles to form a multi-head lock buckle to meet the use requirements;

[0016] 2. The present invention can cooperate with a sealing component to protect the ball during use, thereby preventing the ball from rusting and affecting the subsequent reuse of the entire lock buckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a steel wire rope connection lock buckle with multiple ends and a steel wire rope assembly according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic structural diagram of a steel wire rope connection lock buckle with multiple ends according to an embodiment of the present invention is shown;

[0019] Figure 3 The embodiment of the present invention is shown Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 A schematic cross-sectional structure diagram of a steel wire rope connection lock buckle with multiple ends according to an embodiment of the present invention is shown;

[0021] Figure 5 The embodiment of the present invention is shown Figure 4 The enlarged structural diagram at B in the middle;

[0022] Figure 6 A schematic diagram showing the structure of a top plate and a sealing assembly assembly according to an embodiment of the present invention is shown;

[0023] In the figure: 1. card plate; 2. moving plate; 3. slider; 4. limit plate; 5. support plate; 6. cross plate; 7. top plate; 8. movable block; 9. extension plate; 10. spring; 11. ball bearing; 12. side plate; 13. connecting plate; 14. cover plate; 15. torsion spring; 16. pulling structure; 17. screw rod; 18. sprocket; 19. chain belt; 20. rotating block; 21. U-shaped buckle; 22. nut; 23. wire rope. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0025] The present invention provides a wire rope connection lock with multiple ends, such as Figures 1 to 6As shown, it includes a card board 1, a slide groove is symmetrically opened on the top of the card board 1, a movable plate 2 is symmetrically arranged above the slide groove, a slider 3 cooperating with the slide groove is fixedly installed on the bottom of the movable plate 2, a driving component for driving the slider 3 to move is arranged in the slide groove, a vertical groove is opened on the inner side of the movable plate 2, the bottom of the vertical groove is connected with the outside, a limit plate 4 is slidably installed between two opposite vertical grooves, the inner side of the limit plate 4 is flush with the inner side of the movable plate 2, openings are symmetrically opened on the top of the card board 1, support plates 5 are equidistantly arranged in the opening, multiple support plates 5 are in conflict with each other, and the support plates 5 are also in conflict with the inner wall of the opening, a support component for supporting the support plate 5 is arranged on the outer side of the support plate 5, circular holes are symmetrically opened on the top of the card board 1, a U-shaped buckle 21 is inserted between the two circular holes, and a nut 22 is threadedly connected to the bottom of the U-shaped buckle 21.

[0026] When in use, the two sections of the folded wire rope 23 are placed on the card plate 1, and the driving assembly drives the slider 3 to move the movable plate 2 and the limit plate 4, so that the relative limit plates 4 move closer to each other, and finally a pair of limit plates 4 are located on both sides of the wire rope 23 to limit it, so that the wire rope 23 remains in a vertical state. At this time, the supporting assembly cancels the support of the supporting plate 5 opposite to the limit plate 4 below. At this time, the supporting plate 5 below the limit plate 4 can move downward, and then the U-shaped buckle 21 is pulled to make it drop, so that the U-shaped buckle 21 contacts the wire rope 23 and the limit plate 4, and then the nut 22 is turned to lock the card plate 1 and the U-shaped buckle 21. During the locking process, the wire rope 23 is squeezed between the card plate 1 and the U-shaped buckle 21 to cause deformation. During the whole process, the U-shaped buckle 21 and the card plate 1 move closer to each other, and the U-shaped buckle 21 will press against the limit The positioning plate 4 makes it move synchronously, thereby pushing the support plate 5 that is unsupported under the limit plate 4 downward, ensuring that the limit plate 4 can move smoothly, and during the whole process, the remaining support plates 5 located under the wire rope 23 are in a supported state and remain motionless, so that the wire rope 23 can be supported, thereby ensuring that the two sections of the wire rope 23 can be squeezed tighter, and through the setting of the limit plate 4, when the wire rope 23 is squeezed, the wire rope 23 can be limited, so that the two sections of the wire rope 23 will not be staggered, ensuring that the two sections of the wire rope 23 can be vertically squeezed, thereby improving the squeezing effect between the two sections of the wire rope 23, and by adjusting the spacing between the limit plates 4, the entire lock buckle can adapt to the connection of wire ropes of different thicknesses, which is equivalent to one lock buckle being able to transform into multiple lock buckles to form a multi-head lock buckle to meet the needs of use.

[0027] like Figures 3 to 5As shown, the support assembly includes transverse plates 6 symmetrically fixedly installed on both sides of the support plate 5, movable openings connected to the openings are provided on both sides of the card plate 1, and the transverse plates 6 extend into the movable openings. The thickness of the transverse plates 6 is consistent with the thickness of the support plate 5 and the limit plate 4. An extension plate 9 corresponding to the transverse plate 6 is fixedly installed on the outer side of the card plate 1, and the extension plate 9 and the bottom wall of the movable opening are provided with movable grooves connected to each other. A movable block 8 is slidably arranged in the movable groove, and a top plate 7 is fixedly installed on the top of the movable block 8. The side of the movable block 8 away from the support plate 5 is fixedly connected to the inner wall of the movable groove through a spring 10, a ball groove is provided on the top of the top plate 7, and a ball 11 is arranged in the ball groove, and the ball 11 is in conflict with the transverse plate 6, and a closing component for closing the ball 11 is provided on the outer side of the top plate 7, and a pulling structure 16 for driving the top plate 7 to move outward is provided on the outer side of the movable plate 2.

[0028] The pulling structure 16 is specifically configured as an L-shaped magnet. The pulling structure 16 is fixed to the outside of the movable plate 2. The thickness of the pulling structure 16 is consistent with the thickness of the limiting plate 4. The inner side of the pulling structure 16 is flush with the inner side of the limiting plate 4. The material of the top plate 7 is iron. The magnetism of the pulling structure 16 can absorb at most two top plates 7 at a time, so that both top plates 7 can move in the direction close to the pulling structure 16 until they are separated from the horizontal plate 6.

[0029] When the moving plate 2 moves with the limiting plate 4, the pulling structure 16 moves with it. With the movement of the pulling structure 16, when the pulling structure 16 stops, the one or two top plates 7 opposite to it will be attracted by it and move in the direction close to the pulling structure 16, so that the movable block 8 moves with it to compress the spring 10 to deform it and generate a force. The existence of the ball 11 reduces the friction between the top plate 7 and the cross plate 6 during movement, which facilitates the separation of the top plate 7 from the cross plate 6. When the top plate 7 and the ball 11 are separated from the cross plate 6, the support is cancelled. The support of the plate 5 is achieved by the top plate 7, but due to the friction between the multiple support plates 5, when there is no squeezing, the friction can keep the unsupported support plate 5 in a static state. When the limit plate 4 descends, it will squeeze the unsupported support plate 5 below it and bring the cross plate 6 down, thereby ensuring that the limit plate 4 can descend smoothly. After the top plate 7 is completely separated from the cross plate 6, the closing component will close the ball 11, so that the ball 11 can be protected during subsequent use to prevent the ball 11 from rusting and affecting the subsequent reuse of the entire lock.

[0030] like Figures 5 and 6 As shown, the closing assembly includes side plates 12 symmetrically fixedly mounted on the outside of the top plate 7, a rotating shaft is rotatably mounted between a pair of side plates 12, a connecting plate 13 is fixedly sleeved on the outside of the rotating shaft, a cover plate 14 for sealing the ball 11 is fixedly connected to the outside of the connecting plate 13, both ends of the rotating shaft extend to the outer sleeve of the side plate 12 and a torsion spring 15 is provided, both ends of the torsion spring 15 are fixedly connected to the side plate 12 and the rotating shaft respectively, and when not in use, the cover plate 14 is in conflict with the cross plate 6.

[0031] When the top plate 7 is separated from the cross plate 6, the torsion spring 15 of torsion deformation releases its force to rotate the shaft, the connecting plate 13 and the cover plate 14, so that the cover plate 14 moves in the direction close to the ball 11, and finally the cover plate 14 closes the ball 11 to protect it. When the top plate 7 needs to be reset, the support plate 5 is pushed to make it rise and reset with the cross plate 6, and then, the cover plate 14 is pulled to separate it from the ball 11. At this time, the cover plate 14 cooperates with the connecting plate 13 to twist the torsion spring 15 with the shaft to produce a force to reset the pulling structure 16 and lose the adsorption of the top plate 7. The compressed spring 10 releases its force to drive the movable block 8 to move the top plate 7 in the direction close to the cross plate 6. Finally, the top plate 7 is reset and the cover plate 14 is released. The torsion spring 15 is in a torsion deformation state at this time, so that the cover plate 14 conflicts with the cross plate 6. At this time, the top plate 7 cooperates with the ball 11 to support the cross plate 6.

[0032] like Figure 2 As shown, the driving assembly includes a screw rod 17 rotatably installed in a slide groove, a slider 3 is threadedly sleeved outside the screw rod 17, and the threads on both sides of the screw rod 17 are arranged in opposite directions. One end of the screw rod 17 extends to the outside of the slide groove and is fixedly connected to a sprocket 18. The two sprockets 18 are connected by a chain belt 19, and a rotating block 20 is fixedly installed on the middle part of the outer side of the sprocket 18 on one side.

[0033] By using a wrench to rotate the rotating block 20 in the forward direction, it causes the connected sprocket 18 to rotate, thereby cooperating with the chain belt 19 to rotate another sprocket 18, and then causing the two screw rods 17 to rotate synchronously. The screw rod 17 causes the two sliders 3 connected to its surface to move closer to each other, causing the movable plate 2 and the limit plate 4 to move accordingly, thereby realizing the movement of a pair of limit plates 4 closer to each other.

[0034] like Figure 2 As shown, the size of the limiting plate 4 matches the size of the opening.

[0035] This allows the limiting plate 4 to smoothly descend when being squeezed by the U-shaped buckle 21 , ensuring that the U-shaped buckle 21 can squeeze the steel wire rope 23 tightly.

[0036] like Figure 2 As shown, the material of the limiting plate 4 and the movable plate 2 is steel.

[0037] This makes the limiting plate 4 and the moving plate 2 strong and not easy to be damaged.

[0038] like Figure 3 As shown, the distance between the pulling structure 16 and the top plate 7 is sufficient to allow the top plate 7 to move to be separated from the cross plate 6 .

[0039] It is ensured that the pulling structure 16 can drive the top plate 7 to separate the top plate 7 and the balls 11 from the cross plate 6 .

[0040] Working principle: when in use, place the two sections of the folded wire rope 23 on the clamping plate 1, and use the wrench to rotate the rotating block 20 forward to make it rotate with the connected sprocket 18, so as to cooperate with the chain belt 19 to rotate the other sprocket 18, and then drive the two screw rods 17 to rotate synchronously, and the screw rod 17 drives the two sliders 3 connected to its surface to move closer to each other, so that the moving plate 2 and the limit plate 4 move accordingly, and the relative limit plates 4 move closer to each other, and finally a pair of limit plates 4 are located on both sides of the wire rope 23 to limit it, so that the wire rope 23 remains in a vertical state, at this time the limit plates 4 stop moving, and the moving plate When the limit plate 4 moves, the pulling structure 16 moves accordingly. When the limit plate 4 stops moving, the pulling structure 16 stops moving. At this time, one or two top plates 7 opposite to it will be attracted by it and move in the direction close to the pulling structure 16, so that the movable block 8 moves accordingly and compresses the spring 10 to deform it to generate a force. The existence of the ball 11 reduces the friction between the top plate 7 and the horizontal plate 6 during movement, which facilitates the separation of the top plate 7 from the horizontal plate 6. When the top plate 7 and the ball 11 separate from the horizontal plate 6, the support for the support plate 5 is cancelled. However, due to the gap between the multiple support plates 5 The U-shaped buckle 21 is then pulled down to make it contact with the wire rope 23 and the limiting plate 4, and then the nut 22 is turned to lock the clamping plate 1 and the U-shaped buckle 21. During the locking process, the wire rope 23 is squeezed between the clamping plate 1 and the U-shaped buckle 21 to cause deformation. During the whole process, the U-shaped buckle 21 and the clamping plate 1 move closer to each other, and the U-shaped buckle 21 will press against the limiting plate 4 to make them move together. The support plate 5 below the limit plate 4 is pushed downward by the stop plate 4, thereby ensuring that the limit plate 4 can move smoothly. During the whole process, the remaining support plates 5 below the wire rope 23 are in a supported state and remain motionless, so the wire rope 23 can be supported, thereby ensuring that the two sections of the wire rope 23 can be squeezed tighter. Moreover, by setting the stop plate 4, when squeezing the wire rope 23, the wire rope 23 can be limited, so that the two sections of the wire rope 23 will not stagger, ensuring that the two sections of the wire rope 23 can be vertically squeezed, thereby improving the squeezing effect between the two sections of the wire rope 23;During the process of separating the top plate 7 from the cross plate 6, the torsion spring 15 of the torsion deformation releases the force to rotate the shaft, the connecting plate 13, and the cover plate 14, so that the cover plate 14 moves in the direction close to the ball 11. Finally, the cover plate 14 seals the ball 11 to protect it, so as to prevent the ball 11 from rusting and affecting the subsequent reuse of the entire lock buckle. When it is necessary to reset the top plate 7, the support plate 5 is pushed to make it rise and reset with the cross plate 6, and then the cover plate 14 is pulled to separate it from the ball 11. At this time, the cover plate 14 cooperates with the connecting plate 13 to twist the torsion spring 15 with the shaft to make it deform and generate a force, and the rotating block 20 is reversed. On the contrary, the movement can be realized The movable plate 2 and the limit plate 4 are reset, and the pulling structure 16 is reset accordingly, losing the adsorption to the top plate 7. The compressed spring 10 releases the force to carry the movable block 8 and the top plate 7 to move in the direction close to the cross plate 6. Finally, the top plate 7 is reset, and the cover plate 14 is released. The torsion spring 15 is in a torsion deformation state at this time, so that the cover plate 14 is in conflict with the cross plate 6. At this time, the top plate 7 cooperates with the ball 11 to support the cross plate 6; by adjusting the spacing between the limit plates 4, the entire lock buckle can adapt to the connection of steel wire ropes of different thicknesses, which is equivalent to a lock buckle that can be transformed into multiple lock buckles to form a multi-head lock buckle to meet the needs of use. ;

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A wire rope connection lock with multiple ends, comprising a clamping plate (1), characterized in that: The top of the card plate (1) is symmetrically provided with a slide groove, and a movable plate (2) is symmetrically provided above the slide groove. A slider (3) cooperating with the slide groove is fixedly installed at the bottom of the movable plate (2). A driving component for driving the slider (3) to move is provided in the slide groove. A vertical groove is provided on the inner side of the movable plate (2). The bottom of the vertical groove is communicated with the outside. A limit plate (4) is slidably installed between two opposite vertical grooves. The limit plate (4) and the movable plate (2) are flush with one side close to the wire rope (23). The top of the card plate (1) is symmetrically provided with an opening. Support plates (5) are equidistantly provided in the opening. A support component for supporting the support plate (5) is provided on the outer side. Circular holes are symmetrically provided on the top of the card plate (1). A U-shaped buckle (21) is inserted between the two circular holes. A nut (22) is threadedly connected to the bottom of the U-shaped buckle (21). The support assembly comprises a transverse plate (6) symmetrically fixedly mounted on both sides of the support plate (5); movable openings communicating with the openings are provided on both sides of the clamping plate (1); the transverse plate (6) extends into the movable openings; the thickness of the transverse plate (6) is consistent with the thickness of the support plate (5) and the limit plate (4); an extension plate (9) corresponding to the transverse plate (6) is fixedly mounted on the outer side of the clamping plate (1); the extension plate (9) and the bottom wall of the movable opening are both provided with movable grooves communicating with each other; a movable block (8) is slidably arranged in the movable groove; A top plate (7) is fixedly mounted on the top of the movable block (8); a side of the movable block (8) away from the support plate (5) is fixedly connected to the inner wall of the movable groove via a spring (10); a ball groove is provided on the top of the top plate (7); a ball (11) is provided in the ball groove; the ball (11) contacts the cross plate (6); a closing component for closing the ball (11) is provided on the outside of the top plate (7); and a pulling structure (16) for driving the top plate (7) to move outward is provided on the outside of the movable plate (2); The pulling structure (16) is specifically configured as an L-shaped magnet. The pulling structure (16) is fixed to the outside of the movable plate (2). The thickness of the pulling structure (16) is consistent with the thickness of the limiting plate (4). The pulling structure (16) and the limiting plate (4) are flush on a side close to the steel wire rope (23). The material of the top plate (7) is iron.

2. The multi-head wire rope connection lock according to claim 1, characterized in that: The sealing component comprises side plates (12) symmetrically fixedly mounted on the outside of the top plate (7); a rotating shaft is rotatably mounted between the pair of side plates (12); a connecting plate (13) is fixedly sleeved on the outside of the rotating shaft; a cover plate (14) for sealing the ball bearing (11) is fixedly connected to the outside of the connecting plate (13); both ends of the rotating shaft extend outside the side plates (12) and are sleeved with torsion springs (15); both ends of the torsion spring (15) are fixedly connected to the side plates (12) and the rotating shaft respectively; and when not in use, the cover plate (14) contacts the transverse plate (6).

3. The multi-head wire rope connection lock according to claim 2, characterized in that: The driving assembly comprises a screw rod (17) rotatably mounted in a slide groove, the slider (3) being threadedly sleeved outside the screw rod (17), the threads on both sides of the screw rod (17) being arranged in opposite directions, one end of the screw rod (17) extending outside the slide groove being fixedly connected to a sprocket wheel (18), the two sprocket wheels (18) being connected via a chain belt (19), and a rotating block (20) being fixedly mounted on the middle portion of the outer side of the sprocket wheel (18) on one side.

4. The multi-head wire rope connection lock according to claim 3, characterized in that: The size of the limiting plate (4) is compatible with the size of the opening.

5. The multi-head wire rope connection lock according to claim 4, characterized in that: The material of the limiting plate (4) and the movable plate (2) is steel.

6. The multi-head wire rope connection lock according to claim 5, characterized in that: The distance between the pulling structure (16) and the top plate (7) is sufficient to allow the top plate (7) to move to be separated from the cross plate (6).

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