Connector

Abstract

To provide a connector having high operation safety and used for vertically overlapping containers.SOLUTION: A connector according to the present invention includes a first latch 2, a second latch 3, and a pull rope 4. The first latch 2 includes a first body having two spaced sidewalls 26 and a first latch portion connected to the top side of the first body along a vertical direction Z. On one sidewall 26, a rope passage hole 262 communicating with the exterior and a mounting space 200 is opened. The second latch 3 includes a second body accommodated between two sidewalls 26 and having a second latch portion 36. The pull rope 4 is fixed to the second latch 3 and exposed from the rope passage hole 262, and when pulled, it can move between a locked position in which the second latch portion 36 approaches the first latch portion and engages with the bottom connecting member and a released position in which the second latch portion moves away from the first latch portion and can be released from the bottom connecting member.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a connector, and particularly to a connector used when stacking containers vertically.

Background Art

[0002] Each container has eight connecting members attached to the corners of the top side and the bottom side. During the process of transporting containers by ship, in order to prevent the stacked containers from moving, when loading the containers onto the ship, first, a connector is hung on each of the four connecting members at the bottom side of the container, and then the container is lifted and placed on top of another container. Due to the special shape and angle design of the connectors hung on each container, they engage with the four connecting members at the top side of the lower container in the downward momentum, achieving the locking function of fixing the two vertically stacked containers.

[0003] Patent Document 1 discloses a connector for connecting two vertically stacked containers. The connector includes a first connecting protrusion and a second connecting protrusion installed on opposite sides of each other, and a tightening device.

[0004] The first connecting protrusion engages with the upper container, and the second connecting protrusion engages with the lower container.

[0005] The tightening device has a block movably installed on the first connecting protrusion and a compression spring supporting the block.

[0006] Due to the design of the tightening device, it can prevent the connector hung on the container from unexpectedly falling off during the transportation of the container by ship.

[0007] As shown in FIGS. 1 to 3, a commercially available connector 100 similar to the connector of Patent Document 1 includes a first connecting protrusion 11 that engages with an upper container 101, a second connecting protrusion 12 on the opposite side of the first connecting protrusion 11, and a tightening device 13.

[0008] The fastening device 13 includes a block 131 and a compression spring 132. When detaching the coupler 100 from the container 101, the operator reaches into the coupler 100 from underneath the container 101 and pulls the block 131 to the release position shown in Figure 3 with their fingers, and then removes the coupler 100 from the container 101 by gripping the coupler 100 with their other hand and rotating it.

[0009] In the above operation, the operator cannot reach into the inside of the coupler 100 until they are very close to the container 101, making the operation inconvenient and unsafe. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Chinese Patent No. 101027233 Specification [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] The objective of the present invention is to provide a coupling device for stacking containers vertically that offers high operational safety. [Means for solving the problem]

[0012] To achieve the above objective, the present invention is: A connector that is used when stacking containers vertically and is attached to a bottom connecting member that is fixed to the bottom side of the container, It includes a first latch, a second latch, and a pull rope, The first latch described above is The first main body and A projection connected to the bottom side of the first main body along the vertical direction, It includes a first latch portion connected to the top of the first body along the vertical direction, The first body has two side walls spaced apart in the lateral direction perpendicular to the vertical direction, The top of each of the side walls is connected to the first latch portion, and a mounting space is defined between the two side walls, and one of the side walls has a rope passage hole that communicates with the outside and the mounting space. The second latch is installed in the mounting space so as to be movable along the vertical direction, The second latch is, It includes a second body housed between the two side walls, and an elastic body positioned between the second body and the first latch so as to be compressible, The second body has a second latch portion, The pull rope has one end fixed to the second latch and the other end exposed through the rope passage hole, and when the pull rope is pulled, a force is generated in a direction that is at an angle to the vertical direction, allowing the second latch to move between a locked position and an unlocked position relative to the first latch. When the second latch is in the locked position, the second latch portion approaches the first latch portion, and together they engage with the bottom connecting member. The present invention provides a coupler characterized in that when the second latch is in the release position, the second latch portion separates from the first latch portion, the elastic body is compressed, a biasing force is accumulated that moves the second latch portion to the first latch portion, and the coupler can be detached from the bottom connecting member. [Effects of the Invention]

[0013] In the present invention, since the other end of the pull rope is exposed through the rope passage hole, the operator can pull the pull rope with one hand while maintaining a safe distance from the container, thereby detaching the coupler from the bottom coupling member.

[0014] Since the operator can detach the coupling device of the present invention with one hand, it is convenient to use, allows for the maintenance of a safe distance from the container, prevents the risk of collision with the container, and offers high operational safety. [Brief explanation of the drawing]

[0015] [Figure 1] It is a cross-sectional view of a commercially available connector. [Figure 2] It is a schematic view showing the engagement of the above-mentioned commercially available connector with a container. [Figure 3] It is a schematic view showing the removal of the above-mentioned commercially available connector from a container. [Figure 4] It is a perspective view showing the attachment of an embodiment of the connector of the present invention to a bottom connecting member. [Figure 5] It is a schematic cross-sectional view showing that the above embodiment is attached to a bottom connecting member and a top connecting member. [Figure 6] It is a top view of the above embodiment. [Figure 7] It is a cross-sectional view taken along line VII-VII of FIG. 6 showing that the second latch is in the locked position relative to the first latch. [Figure 8] It is a front view showing that the second latch in the above embodiment is in the locked position relative to the first latch. [Figure 9] It is a partial rear view showing the combination of the second latch and the mounting rod in the above embodiment. [Figure 10] It is a front view similar to FIG. 8 showing that the second latch in the above embodiment is in the disengaged position relative to the first latch. [Figure 11] It is a schematic cross-sectional view showing that the second latch in the above embodiment is in the locked position relative to the first latch. [Figure 12] It is a cross-sectional view similar to FIG. 7 showing that the second latch in the above embodiment is in the disengaged position relative to the first latch. <第 [Figure 13] It is a schematic cross-sectional view similar to FIG. 11 showing that the second latch in the above embodiment is in the disengaged position relative to the first latch.

Embodiments for Carrying Out the Invention

[0016] To more clearly illustrate the object, technical means, and advantages of the embodiments of the present invention, the technical means in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. It will be clear that the embodiments described are some, and not all, embodiments of the present invention. Typically, the components of the embodiments of the present invention depicted and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the detailed description of the embodiments of the present invention provided below in the accompanying drawings does not constitute any limitation on the scope of protection of the present invention, but merely illustrates selected embodiments of the present invention.

[0017] Before describing the present invention in more detail, it should be noted that, where appropriate, reference numerals or the end portion of reference numerals are repeated between figures to indicate corresponding or similar elements, and these may optionally have similar characteristics.

[0018] In the description of this invention, terms indicating directions and positional relationships such as "up," "down," "inside," "outside," "left," "right," "front," and "back" are based on the directions and positional relationships shown in the drawings, or the directions and positional relationships that are habitually used when using the product of this invention, for the sake of simpler and clearer explanation. They do not teach or suggest that the corresponding apparatus or device has a specific direction, structure or operation in a specific direction, and are not limitations to this invention.

[0019] Furthermore, in the description of this invention, terms such as "first," "second," etc., are used solely for the purpose of distinction and do not imply or suggest relative importance.

[0020] As shown in Figures 4 to 6, the embodiment of the coupling of the present invention is a coupling that is attached to the bottom coupling member 91 and connected to the top coupling member 92 when stacking containers vertically.

[0021] The bottom connecting member 91 is fixed to the bottom side of the upper container (not shown), and the top connecting member 92 is fixed to the top side of the lower container (not shown).

[0022] The structure and usage of the bottom connecting member 91 and the top connecting member 92 are prior art for containers, and the details can be inferred by a person with ordinary skill in the art of the present invention; therefore, a detailed explanation is omitted here.

[0023] Furthermore, the coupler of the present invention includes a first latch 2, a second latch 3, and a pull rope 4, as shown in Figure 4.

[0024] The first latch 2, as shown in Figure 5, includes a first body 21, a first latch portion 22 connected to the top side of the first body 21 along the vertical direction Z, a projection 23 connected to the bottom side of the first body 21 along the vertical direction Z, and a mounting rod 24 fixed to the first body 21.

[0025] As shown in Figures 4 to 6, the first main body 21 includes a base wall 25 extending along the vertical direction Z, two side walls 26 spaced apart in the horizontal direction X perpendicular to the vertical direction Z and installed on both sides of the base wall 25, a projection base 27 formed on the base wall 25, and a connecting wall 28 configured to connect the two side walls 26 along the horizontal direction X.

[0026] In this embodiment, the horizontal direction X is the left-right direction.

[0027] A mounting space 200 is defined between the two side walls 26, extending towards the front (downward in Figure 6).

[0028] Each side wall 26 has a mounting hole 261 that communicates with the mounting space 200.

[0029] One side wall 26 has a rope passage hole 262 that communicates with the outside and the mounting space 200.

[0030] In this embodiment, the rope passage hole 262 is formed parallel to the lateral direction X, but in other variations, the rope passage hole 262 can be formed to be inclined with respect to the lateral direction X and the vertical direction Z.

[0031] As shown in Figures 5 to 7, the projection base 27 is formed between the two side walls 26 while being located within the mounting space 200.

[0032] Furthermore, as shown in Figures 5 and 7, the projection base 27 has a top surface 271 formed on the top side and a rope groove 272 formed on the front side through which the pull rope 4 passes.

[0033] The rope channel 272 is formed between two side walls 26 and includes a straight portion 273 extending along the vertical direction Z and a curved portion 274 that curves and extends from the straight portion 273 toward the rope passage hole 262 and connects to the rope passage hole 262.

[0034] As shown in Figures 4 to 6, the connecting wall 28 is configured in a U-shape such that each of its opposite ends in the lateral direction X extends beyond the two side walls 26. That is, the right end of the connecting wall 28 protrudes to the right beyond the right ends of the two side walls 26, and the left end of the connecting wall 28 protrudes to the left beyond the left ends of the two side walls 26.

[0035] The position of the connecting wall 28 in the vertical direction Z is aligned with the position of the rope passage hole 262 in the vertical direction Z.

[0036] In this embodiment, when the bottom connecting member 91 and the top connecting member 92 are attached, the bottom connecting member 91 and the top connecting member 92 abut against both the upper and lower sides of the connecting wall 28.

[0037] The first latch portion 22 is connected to the top of each side wall 26 and is used to attach to the bottom connecting member 91.

[0038] As shown in Figure 5, the projections 23 are positioned opposite each side wall 26 in the front-rear direction, which is perpendicular to the lateral direction X and the vertical direction Z, and are used to automatically insert into the top connecting member 92.

[0039] The mounting rod 24 is fixed to each mounting hole 261 along the lateral direction X.

[0040] As shown in Figures 5, 8, and 9, the second latch 3 is installed in the mounting space 200 so that it can move along the vertical direction Z.

[0041] The second latch 3 includes a second body 31 housed between two side walls 26 and an elastic body 32 positioned between the second body 31 and the first latch 2 so as to be compressible.

[0042] As shown in Figures 5, 8, and 9, the second body 31 includes a main wall 33, two spacing walls 34 installed on the main wall 33 so as to extend from the main wall 33 toward the side where the base wall 25 is located (i.e., the rear side) at intervals from each other, a hook wall 35 formed on the top side of the main wall 33, a second latch portion 36 formed on the opposite side of the main wall 33 from where the two spacing walls 34 are installed (i.e., the front side of the main wall 33), and an annular portion 37 connected to the bottom side of the main wall 33.

[0043] As shown in Figure 9, the top ends of the two intervening walls 34 are connected, and a storage tank 30 is defined between the portions of the two intervening walls 34 other than their top ends.

[0044] Each spacing wall 34 has a long groove 341 that extends along the vertical direction Z.

[0045] The mounting rod 24 is inserted into each of the long grooves 341 of the second latch 3. That is, each long groove 341 is used for inserting the mounting rod 24.

[0046] Each spacing wall 34 has a fixed seat 342 that is spaced apart from the storage tank 30 in the lateral direction X and is located below the hooking wall 35.

[0047] The fixed base 342 includes an opening 343 that communicates with the mounting space 200 and is formed to allow the rope body 42 to pass through.

[0048] The hook wall 35 includes a through hole 351 that is located above the fixing base 342 and is aligned with the position of the opening 343.

[0049] Furthermore, the hook wall 35 extends higher than the top surface 271 of the projection base 27 toward the first latch portion 22.

[0050] As shown in Figure 5, the annular portion 37 extends toward the projection 23, that is, toward the rear, and together with the hooking wall 35, defines a storage space 38 that accommodates the projection base 27.

[0051] In this embodiment, the elastic body 32 is a compression spring, which is installed in the housing tank 30, and both of its opposite ends are in contact with the mounting rod 24 and the second body 31, respectively.

[0052] As shown in Figures 4 to 8, in this embodiment, the second latch portion 36 has two locking walls 361 spaced apart in the lateral direction X. Each locking wall 361 is trapezoidal in shape.

[0053] As shown in Figures 7 and 9, the pull rope 4 has one end fixed to the second latch 3 and the other end exposed through the rope passage hole 262. In this embodiment, the pull rope 4 has a fixed head 41 fixed to the fixed seat 342, a rope body 42 extending from the fixed head 41 and exposed through the rope passage hole 262, and a handle 43 attached to the end of the rope body 42 that is outside the rope body 42.

[0054] The through hole 351 in the hooking wall 35 of the second latch 3 is formed to allow the fixing head 41 to pass through. The size of the fixing head 41 is larger than the size of the opening 343 of the fixing seat 342. Therefore, the fixing head 41 can pass through the through hole 351 and be fixed to the fixing seat 342.

[0055] In this embodiment, the rope body 42 is a wire rope and extends outwards from the rope passage hole 262 after passing through the rope spool 272.

[0056] More specifically, the rope body 42 passes through the opening 343 of the fixing base 342, extends downward along the straight section 273 of the rope spool 272, then bends along the curved section 274, extends out of the rope passage hole 262, and the attachment point to the handle 43 becomes the end. In this embodiment, the handle 43 is a gourd-shaped handle.

[0057] As shown in Figure 5, the bottom connecting member 91 and the top connecting member 92 abut against the upper and lower sides of the connecting wall 28, respectively, and the rope body 42 and handle 43 can be exposed between the bottom connecting member 91 and the top connecting member 92, so that the structure of the present invention is not affected when stacking containers.

[0058] As shown in Figures 8 and 10, when the pull rope 4 is pulled, a force is generated in a direction that forms an angle with the vertical direction Z, allowing the second latch 3 to move up and down relative to the first latch 2 between the locked position shown in Figure 8 and the released position shown in Figure 10. In this embodiment, this force is a lateral force.

[0059] As shown in Figures 7, 8, and 11, when the second latch 3 is in the locked position, the second latch portion 36 approaches the first latch portion 22, and together they engage with the bottom connecting member 91, and the lower ends of each long groove 341 come into contact with the mounting rod 24.

[0060] As shown in Figures 10, 12, and 13, when the second latch 3 is in the release position, the second latch portion 36 separates from the first latch portion 22, and the hooking wall 35 comes into contact with the top surface 271 of the projection base 27, compressing the elastic body 32 and accumulating a biasing force that moves the second latch portion 36 to the first latch portion 22, and the upper end of each long groove 341 comes into contact with the mounting rod 24, and at that time the second latch portion 36 is not locked to the bottom connecting member 91, so the connector of the present invention can be detached from the bottom connecting member 91.

[0061] During the period when the second latch 3 moves between the locked position and the unlocked position, each long groove 341 moves up and down relative to the mounting rod 24. Each long groove 341 can limit the range of motion of the second latch 3.

[0062] Then, when the two stacked containers are separated and the coupler is to be removed, the fixing head 41 of the pull rope 4 is fixed to the second latch 3. As a result, the operator can simply take the handle 43 of the pull rope 4 with one hand and pull it away from the bottom connecting member 91, causing the pull rope 4 to quickly move downward along the vertical direction Z and into the release position. This causes the coupler to automatically detach from the bottom connecting member 91 and fall down.

[0063] At that time, since the operator's hand is still holding the handle 43 of the pull rope 4, the coupler can be detached as is, and thus the operator can operate the coupler while maintaining a safe distance from the container, making it highly safe.

[0064] According to the above configuration, since the other end of the pull rope 4 of the coupler of the present invention is exposed through the rope passage hole 262, the coupler of the present invention will automatically detach from the bottom connecting member 91 simply by the operator taking the handle 43 with one hand and pulling it away from the bottom connecting member 91 while maintaining a safe distance from the container. Therefore, since the operator can operate the coupler of the present invention with one hand, it is convenient to use, a safe distance from the container can be maintained, the risk of collision with the container can be prevented, the safety of operation is high, and the objectives of the present invention can be achieved.

[0065] While the present invention has been described in relation to what may be considered exemplary embodiments, it is understood that the invention is not limited to the disclosed embodiments and is intended to cover a variety of configurations that fall within the broadest spirit and scope of interpretation to encompass all such modifications and equivalent configurations.

[0066] The above embodiments are illustrative in illustrating the principles and effects of the present invention and do not limit it. A person skilled in the art can make some modifications and alterations to the above embodiments, provided that they do not deviate from the spirit and scope of the invention. Therefore, all modifications and alterations made by a person skilled in the art, provided that they do not deviate from the spirit of the invention, should also be considered to fall within the scope of protection of the present invention. [Industrial applicability]

[0067] This invention is suitable for providing a coupling device that offers high operational safety and is used when stacking containers vertically. [Explanation of Symbols]

[0068] 2. First latch 200 mounting space 21 The first body 22 First latch 23 Protrusion 24 Mounting rods 25 Base Wall 26 Side wall 261 Mounting holes 262 Rope passage hole 27 Protrusion stand 271 Top surface 272 Rope tank 273 Straight section 274 Curved section 28 Connecting wall 3. Second latch 30 storage tanks 31 The second body 32 Elastic body 33 Main Wall 34 Spacing wall 341 Long tank 342 Fixed seat 343 Aperture 35 Wall-mounted hooks 351 Passing hole 36 Second latch 361 Locking wall 37 Ring section 38 Containment space 4. Pulling rope 41 Fixed head 42 Main body of the rope 43 Handle 91 Bottom connecting member 92 Top connecting member X horizontal direction Z vertical direction

Claims

1. A coupler applied to be attached to a bottom connecting member fixed to the bottom side of the upper container when stacking containers vertically, It includes a first latch, a second latch, and a pull rope, The first latch is The first main body and A projection connected to the bottom side of the first main body along the vertical direction, It includes a first latch portion connected to the top of the first body along the vertical direction, The first body has two side walls spaced apart in the lateral direction perpendicular to the vertical direction, The top of each of the side walls is connected to the first latch portion, and a mounting space is defined between the two side walls, and one of the side walls has a rope passage hole that communicates with the outside and the mounting space. The second latch is installed in the mounting space so as to be movable along the vertical direction, The second latch described above is It includes a second body housed between the two side walls so that the entire body can move along the vertical direction, and an elastic body positioned between the second body and the first latch so that it can be compressed, The second body has a second latch portion, The pull rope has one end fixed to the second latch and the other end exposed through the rope passage hole, and when the pull rope is pulled, a force is generated in a direction that is at an angle to the vertical direction, allowing the second latch to move between a locked position and an unlocked position relative to the first latch. When the second latch is in the locked position, the second latch portion approaches the first latch portion, and together they engage with the bottom connecting member. When the second latch is in the release position, the second latch portion separates from the first latch portion, the elastic body is compressed, and a biasing force is accumulated that moves the second latch portion to the first latch portion, and the coupler can be detached from the bottom connecting member. The second main body further comprises a main wall and two spacing walls installed on one side of the main wall and spaced apart from each other. A storage tank is defined between the two aforementioned partition walls. The elastic body is installed inside the storage tank, The coupler is characterized in that the second latch portion is formed on the side of the main wall opposite to the side where the two intervening walls are installed.

2. A coupler applied to be attached to a bottom connecting member fixed to the bottom side of the upper container when stacking containers vertically, It includes a first latch, a second latch, and a pull rope, The first latch is The first main body and A projection connected to the bottom side of the first main body along the vertical direction, It includes a first latch portion connected to the top of the first body along the vertical direction, The first body has two side walls spaced apart in the lateral direction perpendicular to the vertical direction, The top of each of the side walls is connected to the first latch portion, and a mounting space is defined between the two side walls, and one of the side walls has a rope passage hole that communicates with the outside and the mounting space. The second latch is installed in the mounting space so as to be movable along the vertical direction, The second latch described above is It includes a second body housed between the two side walls so that the entire body can move along the vertical direction, and an elastic body positioned between the second body and the first latch so that it can be compressed, The second body has a second latch portion, The pull rope has one end fixed to the second latch and the other end exposed through the rope passage hole, and when the pull rope is pulled, a force is generated in a direction that is at an angle to the vertical direction, allowing the second latch to move between a locked position and an unlocked position relative to the first latch. When the second latch is in the locked position, the second latch portion approaches the first latch portion, and together they engage with the bottom connecting member. When the second latch is in the release position, the second latch portion separates from the first latch portion, the elastic body is compressed, and a biasing force is accumulated that moves the second latch portion to the first latch portion, and the coupler can be detached from the bottom connecting member. The second main body further comprises a storage tank in which the elastic body is installed, and a fixed seat that is spaced apart from the storage tank in the lateral direction. The coupling is characterized in that the pull rope has a fixing head fixed to the fixing base and a rope body extending from the fixing head and exposed through the rope passage hole.

3. A coupler applied to be attached to a bottom connecting member fixed to the bottom side of the upper container when stacking containers vertically, It includes a first latch, a second latch, and a pull rope, The first latch is The first main body and A projection connected to the bottom side of the first main body along the vertical direction, It includes a first latch portion connected to the top of the first body along the vertical direction, The first body has two side walls spaced apart in the lateral direction perpendicular to the vertical direction, The top of each of the side walls is connected to the first latch portion, and a mounting space is defined between the two side walls, and one of the side walls has a rope passage hole that communicates with the outside and the mounting space. The second latch is installed in the mounting space so as to be movable along the vertical direction, The second latch described above is It includes a second body housed between the two side walls so that the entire body can move along the vertical direction, and an elastic body positioned between the second body and the first latch so that it can be compressed, The second body has a second latch portion, The pull rope has one end fixed to the second latch and the other end exposed through the rope passage hole, and when the pull rope is pulled, a force is generated in a direction that is at an angle to the vertical direction, allowing the second latch to move between a locked position and an unlocked position relative to the first latch. When the second latch is in the locked position, the second latch portion approaches the first latch portion, and together they engage with the bottom connecting member. When the second latch is in the release position, the second latch portion separates from the first latch portion, the elastic body is compressed, and a biasing force is accumulated that moves the second latch portion to the first latch portion, and the coupler can be detached from the bottom connecting member. The first main body further comprises a base wall on which the two side walls are installed, and a projection base formed on the base wall and located within the mounting space, The aforementioned projection base has a top surface, The second body further has a hooking wall that faces the first latch portion and is higher than the top surface, A coupler characterized in that when the second latch moves to the release position, the hooking wall comes into contact with the top surface.

4. Each of the aforementioned side walls has a mounting hole formed therein. Each of the aforementioned intervening walls has a long groove that extends along the vertical direction, The first latch further includes a mounting rod fixed to each of the mounting holes and inserted into each of the long grooves of the second latch, The opposite ends of the elastic body are in contact with the mounting rod and the second body, respectively. The coupler according to claim 1, characterized in that each of the long grooves moves up and down relative to the mounting rod during the period in which the second latch moves between the locked position and the released position.

5. The first body further has a rope spool formed between the two side walls through which the tow rope passes, The coupler according to any one of claims 1 to 3, characterized in that the rope spool includes a straight portion extending along the vertical direction and a curved portion that curves and extends from the straight portion toward the rope passage hole and connects to the rope passage hole.

6. The second main body further has a fixing base located below the hanging wall, The aforementioned pull rope comprises a fixing head fixed to the fixing base and a rope body extending from the fixing head and exposed through the rope passage hole. The coupler according to claim 3, characterized in that the hook wall includes a through hole formed to allow the fixing head to pass through.

7. The coupling device according to claim 6, characterized in that the rope body is a wire rope.

8. The fixing base includes an opening formed to allow the rope body to pass through, The coupler according to claim 6, characterized in that the size of the fixed head is larger than the size of the opening.

9. The first body further has a connecting wall configured to connect the two side walls along the lateral direction, The connecting wall is configured such that each of its opposite ends in the lateral direction extends beyond the two side walls. The connector according to any one of claims 1 to 3, characterized in that the position of the connecting wall in the vertical direction is aligned with the position of the rope passage hole in the vertical direction.

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