Net connecting device

Abstract

To provide a net connecting device that is suitably used without being made to abut on a roof floor (exterior floor) etc. of a building.SOLUTION: A net connecting device 1 is mounted on a parapet P of a building to stretch a net R, and comprises: a first abutting part 11 and a second abutting part 12 which abut on two back-to-back surfaces of the parapet P; an elastic coupling part 13 which couples top sides of the first abutting part 11 and the second abutting part 12 to each other; a screw part 14 which is located in the coupling part 13, and rotates to expand and contract the coupling part 13 to make the first abutting part 11 and the second abutting part 12 abut on the two back-to-back surfaces in the contraction state; and a net holding part 16 which is located outside above the first abutting part 11, and serves as a screw operation part 15 rotatably operating the screw part 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rope connecting device that is attached to a protruding part of a building, such as a parapet, and to which a rope is connected. [Background technology]

[0002] Patent Document 1 discloses a life rope tensioning device that is less likely to come off the parapet. This life rope tensioning device is for tensioning a substantially horizontal rope on an external floor with a parapet on its outer periphery, and is equipped with a clamping part that clamps the parapet with an outer abutment part that abuts on the outer surface of the parapet and an inner abutment part that abuts on the inner surface of the parapet, a floor abutment part that abuts on the surface of the external floor, and a life rope holding part that holds the life rope. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6359293 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned lifeline tensioning device is used in a location where a groove is formed in the external floor, and since the floor contact portion is structured to contact the rising portion of the groove, it is not suitable for use without contacting the external floor.

[0005] In view of the above circumstances, an object of the present invention is to provide a rope connecting device that is suitable for use without contacting the rooftop floor (external floor) of a building or the like. [Means for solving the problem]

[0006] In order to solve the above problems, the rope connecting device of the present invention is a rope connecting device that is attached to a protruding part of a building and to which a rope is connected, a first contact portion and a second contact portion disposed opposite to each other and contacting two surfaces of the protruding portion facing each other; an expandable connecting portion that connects upper sides of the first contact portion and the second contact portion; a screw portion that is located within the connecting portion, expands and contracts the connecting portion by a rotational operation, and presses the first contact portion and the second contact portion against the two opposing surfaces in a contracted state; a screw operating portion located on the first contact portion side and configured to rotate the screw portion; The device is characterized by comprising a rope holding portion provided around the screw operating portion or at a location from the screw operating portion to a longitudinal midpoint of the first abutment portion.

[0007] With the above configuration, the rope holding portion is provided around the screw operating portion or at a location from the screw operating portion to the longitudinal midpoint of the first abutment portion, so even if a force pulling on the rope holding portion is generated, it is unlikely that a rotational force will be generated that would cause the rope connecting device to roll up and detach from the protruding portion, making the rope connecting device suitable for use without abutting against the roof floor (external floor) of a building, etc.

[0008] The screw operating portion may be a ring-shaped portion that also serves as the rope holding portion. In this case, the force pulling the rope holding portion is directly transmitted to the screw portion, and the second abutment portion becomes a force that presses the protruding portion, thereby reducing the rotational force that would unwind the rope connecting device from the protruding portion. Furthermore, the number of parts is reduced, resulting in a lighter weight. The light weight reduces the workload when lifting the rope connecting device from an inspection hatch onto the roof floor of a building. Furthermore, if the screw operating portion is a ring-shaped portion, a rod can be inserted into the ring-shaped portion to easily turn the screw portion.

[0009] A cushioning member for preventing damage to the protruding portion may be provided at a portion of the first abutment portion that abuts against the protruding portion and at a portion of the second abutment portion that abuts against the protruding portion. Also, a cushioning member for preventing damage to the protruding portion may be provided at a portion of the connecting portion that abuts against the protruding portion. With these configurations, damage to the protruding portion can be prevented when the rope connecting device is attached to the protruding portion.

[0010] The rope connecting device may also be attached to a parapet constructed on a building as the protruding portion, and tensioned to tension the life rope. [Effects of the Invention]

[0011] With the present invention, even if a pulling force is generated on the rope holding portion, it is unlikely that a rotational force will be generated that would cause the rope connecting device to roll up and detach from the protruding portion, thereby making the rope connecting device suitable for use without abutting against the rooftop floor (external floor) of a building, etc. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is an explanatory diagram showing an embodiment of a rope connecting device attached to a parapet. [Figure 2] 5A and 5B are five-view diagrams of a rope connecting device according to an embodiment. [Figure 3] 1 is a perspective explanatory view of a rope connecting device according to an embodiment. FIG. [Figure 4] 10A and 10B are explanatory diagrams of a rope connecting device according to another embodiment. [Figure 5] FIG. 10 is an explanatory diagram showing an embodiment of a rope connecting device attached to a protruding portion other than a parapet. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. As shown in Figure 1, the rope connecting device 1 of the embodiment is a device attached to a parapet P, which is a protruding part of a building, and a master rope R (hook) is stretched between the rope connecting devices 1 attached to each of two parapets P located apart from each other.

[0014] This rope connecting device 1 includes a first contact portion 11, a second contact portion 12, a connecting portion 13, a screw portion 14, and a rope holding portion 16 that also serves as a screw operating portion 15.

[0015] The first contact portion 11 and the second contact portion 12 are arranged opposite to each other and contact the opposing surfaces of the parapet P. In this example, the first contact portion 11 contacts the inner surface of the parapet P, and the second contact portion 12 contacts the outer surface of the parapet P.

[0016] The first abutment portion 11 includes a leg portion 11a that is vertically long in use as shown in FIG. 1, and a protruding contact portion 11b located at the lower end of the leg portion 11a and protruding further toward the inner surface of the parapet P than the leg portion 11a (protruding toward the location of the second abutment portion 12). As shown in FIGS. 2(A), 2(B), 2(C), 2(D), and 2(E), the leg portion 11a is composed of two square pipe portions welded to the connecting portion 13 at its upper side, sandwiching one end of the connecting portion 13 therebetween. The protruding contact portion 11b is composed of a U-shaped member having opposing surfaces facing each other and a connecting surface connecting these opposing surfaces. The upper opposing surface of this U-shaped member is short, and the lower opposing surface is long. The lower ends of the two square pipe portions are welded to the lower opposing surface, which is located beyond the upper opposing surface in a plan view. The ends of the upper opposing surfaces are also welded and fixed to the side surfaces of the two square pipe portions.

[0017] Similarly, the second contact portion 12, in the usage configuration shown in FIG. 1, includes a vertically long leg portion 12a and a protruding contact portion 12b located at the lower end of the leg portion 12a and protruding further toward the outer surface of the parapet P than the leg portion 12a (protruding toward the first contact portion 11). The leg portion 12a also consists of two square pipe portions welded to the connecting portion 13 at its upper side, sandwiching the other end of the connecting portion 13. The protruding contact portion 12b is a U-shaped member having opposing surfaces facing each other and a connecting surface connecting these opposing surfaces. The upper opposing surface of this U-shaped member is short and the lower opposing surface is long. The lower ends of the two square pipe portions are welded to the lower opposing surface, which is located beyond the upper opposing surface in a plan view. The ends of the upper opposing surface are also welded to the side surfaces of the two square pipe portions. Furthermore, the second abutment portion 12 has a reinforcing U-shaped member 12c that fits between the upper and lower opposing surfaces, and this reinforcing U-shaped member 12c is also welded and fixed to the two square pipe portions and the U-shaped member.

[0018] Furthermore, a rubber plate 111 (a shock-absorbing member) that prevents damage to the wall surface of the parapet P is affixed to the connecting surface portion that is the end face of the protruding contact portion 11b facing the inner surface, and a rubber plate 121 (a shock-absorbing member) is also affixed to the connecting surface portion that is the end face of the protruding contact portion 12b facing the outer surface. Furthermore, a lid member 112 is screwed to the upper end of the first abutting portion 11, and a lid member 122 is screwed to the upper end of the second abutting portion 12. The lid members 112, 122 prevent rainwater from entering the square pipe portions of the first and second abutting portions 11, 12.

[0019] As shown in Figure 3, the connecting part 13 consists of a first square pipe 131 and a second square pipe 132 that is fitted into the first square pipe 131 from one end thereof, and is configured to be flexible due to the adjustable fitting amount, allowing it to avoid the fascia of the parapet P and be freely attached to parapets P of different wall thicknesses.

[0020] A rubber plate 13a (a shock-absorbing member) is attached to the underside of the first square pipe 131 to prevent damage to the coping portion of the parapet P. The other end of the first square pipe 131 is welded and fixed to the upper side of the two square pipe portions of the leg portion 12a, as described above. Similarly, the other end of the second square pipe 132 is welded and fixed to the upper side of the two square pipe portions of the leg portion 12a.

[0021] A support part 131a that rotatably supports the screw part 14 is attached to the other end of the first square pipe 131 in the connecting part 13. On the other hand, a nut part 132a is fixed to the end part of the second square pipe 132 that is located inside the first square pipe 131.

[0022] The screw portion 14 is an eyebolt (eye nut) having a ring-shaped portion on one end of the screw rod portion 14a. A spring washer is fitted onto the portion of the screw rod portion 14a between the ring-shaped portion and the first square pipe 131. The tip end of the screw rod portion 14a is threadedly engaged with a nut portion 132a. By rotating the screw portion 14, the connecting portion 13 expands and contracts, and in the contracted state, the first contact portion 11 and the second contact portion 12 can be pressed against the two opposing surfaces of the parapet P.

[0023] In this embodiment, the ring-shaped portion of the eyebolt, which is the screw portion 14, serves as a screw operating portion 15 that is located outside the upper part of the first abutment portion 11 and rotates the screw portion 14. In addition, the ring-shaped portion of the eyebolt, which is the screw portion 14, serves as a rope holding portion 16. In other words, the screw operating portion 15 also serves as the rope holding portion 16.

[0024] With the above configuration, the rope holding portion 16 is located at the position of the screw operating portion 15, so the force pulling on the rope holding portion 16 is transmitted directly to the screw portion 14, causing the second abutment portion 12 to press against the outer surface of the parapet P, making it difficult for a rotational force to be generated that would roll the rope connecting device 1 off the parapet P, making the rope connecting device 1 suitable for use without abutting it against the rooftop floor (external floor) of a building, etc.

[0025] Furthermore, if the screw operating part 15 also serves as the rope holding part 16, the number of parts can be reduced, which also contributes to the weight reduction of the rope connection device 1. Being lightweight also reduces the workload when lifting the rope connection device 1 from an inspection hatch onto the roof floor of a building. Furthermore, the screw operating part 15, which also serves as the rope holding part 16, is a ring-shaped part that is located at the end of the screw part 14 and can be connected to a master rope R (hook), so that a rod such as a chisel can be inserted into this ring-shaped part to easily turn the screw part 14.

[0026] The screw operating portion 15 is not limited to a configuration that doubles as the rope holding portion 16. For example, as shown in FIG. 4, the screw operating portion 15 may be a member with a hole through which a rod such as a spear can be inserted. The rope holding portion 16 may be provided at the middle position in the longitudinal (height) direction of the first contact portion 11. Even in a configuration in which the rope holding portion 16 is provided at such a middle position, a rotational force that would cause the rope connecting device 1 to roll up and detach from the parapet P is less likely to be generated compared to a configuration in which the rope holding portion 16 is provided at the lower end side of the first contact portion 11. The rope holding portion 16 may also be provided at a location above the middle position. Alternatively, the square pipe portion of the first contact portion 11 may be extended above (around) the screw operating portion 15, a member may be fixed between the extended square pipe portions, and the rope holding portion 16 may be welded to the member separately from the screw operating portion 15. Furthermore, the rope holding portion 16 may be fixed by welding separately from the screw operating portion 15 to the square pipe portion of the first abutment portion 11 located on the side (surrounding area) of the screw operating portion 15 .

[0027] Furthermore, the location where the rope connection device 1 is attached is not limited to the parapet P. As shown in Figure 5, the rope connection device 1 can also be attached at a 90-degree angle to a protruding part P1 of a building that protrudes laterally. Furthermore, although the rope connection device 1 is a life rope tensioning device that tensions the life rope R (hook), it can also be a device in which a safety rope (safety harness) is directly connected to the rope holding part 16.

[0028] Furthermore, the life rope R connected to the rope connecting device 1 may be colored to be visually conspicuous, and a safety pulley may be connected to the life rope R.

[0029] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0030] 1: Rope connection device 11: 1st contact part 11a: Legs 11b:Protruding contact part 12:Second contact part 12a: Legs 12b:Protruding contact part 12c: Reinforcing U-shaped member 13:Connection part 13a: Rubber plate 14: Screw part 14a: Threaded rod 15: Screw operation part 16: Rope holding part 111: Rubber plate 112: Lid member 121: Rubber plate 122: Lid member 131: First square pipe 131a: Support part 132: Second square pipe 132a: Nut part P: Parapet P1: Protruding part R: Parent rope

Claims

1. A rope connection device that is attached to a protruding part of a building and to which a rope is connected, a first contact portion and a second contact portion disposed opposite to each other and contacting two surfaces of the protruding portion facing each other; an expandable connecting portion that connects upper sides of the first contact portion and the second contact portion; a screw portion that is located within the connecting portion, expands and contracts the connecting portion by a rotational operation, and presses the first contact portion and the second contact portion against the two opposing surfaces in a contracted state; a screw operating portion located on the first contact portion side and configured to rotate the screw portion; A rope connecting device characterized by comprising a rope holding portion provided around the screw operating portion or at a location from the screw operating portion to a longitudinal midpoint of the first abutment portion.

2. 2. The rope connecting device according to claim 1, wherein the screw operating portion is a ring-shaped portion that also serves as the rope holding portion.

3. 2. The rope connecting device according to claim 1, characterized in that the rope connecting device is provided with a cushioning member at the portion of the first abutment portion that abuts against the protruding portion and at the portion of the second abutment portion that abuts against the protruding portion, to prevent the protruding portion from being damaged.

4. 2. The rope connecting device according to claim 1, further comprising a buffer member at a portion of the connecting portion that abuts against the protruding portion, for preventing the protruding portion from being damaged.

5. 5. The rope connecting device according to claim 1, wherein a parapet constructed on a building is attached as the protruding portion and a life rope is tensioned.

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