JP7641464B2 - Multiple cable laying jig and multiple cable laying method - Google Patents

Description

The present invention relates to a multiple cable installation jig and multiple cable installation method that can efficiently install cables on a cable rack that is supported near the ceiling, for example.

Various devices and methods have been proposed for installing cables on wiring equipment called cable racks and cable ladders, which consist of parent and child girders.

The cable laying device described in Patent Document 1 is a laying device that uses a hollow chute formed along the parent beam of the cable ladder. The cable is pulled while a shuttle is moved inside the chute, and a spare rope that is connected to the cable is connected to the shuttle, and the cable is moved together with the shuttle.

The cable installation method described in Patent Document 2 first involves wrapping and arranging multiple ring-shaped supports along the longitudinal direction of the cable rack. Then, a long-length towing tool is placed on the sub-girder after passing through the supports. The end of the cable is then connected to the long-length towing tool, and the cable is laid on the sub-girder of the cable rack by pulling the towing tool.

The multiple cable simultaneous laying jig described in Patent Document 3 is configured to use a sled body that can be placed on the sub-girders of a cable rack. In other words, an untwisting jig is connected to the sled body, and multiple cables or pilot ropes are connected to this untwisting jig. Then, the sled body with multiple cables connected to it is moved over the sub-girders of the cable rack to lay multiple cables simultaneously.

Special Publication No. 7-34614 Patent No. 4523534 Patent No. 6132607

The cable laying device described in Patent Document 1 uses hollow chutes formed along the parent girders of the cable ladder, so it is necessary to provide chutes along all parent girders of the cable ladder through which the cables are laid. This creates the inconvenience of extremely high installation and manufacturing costs for the chutes.

The cable installation method described in Patent Document 2 involves passing the towing tool for the long body through multiple supports arranged along the longitudinal direction of the cable rack, so the longer the cable wiring distance, the more supports must be arranged and the long body must be passed through these supports in advance. This requires an extremely large amount of work, such as the work of arranging the supports and the work of passing the long body through them in advance.

On the other hand, the multiple cable simultaneous extension jig described in Patent Document 3 is configured to move the sled body, to which multiple cables are connected, on the sub-girders of the cable rack. Therefore, if the cables are already laid on the sub-girders of the cable rack, there is a risk that the cables will be damaged when the sled body is moved.

Furthermore, if the number of connected cables increases or the distance along the railway line becomes longer, a greater load is placed on the sled body. Therefore, if there are a large number of cables laid or the distance along the railway line becomes longer, it becomes difficult to move the sled body, which is an inconvenience.

Therefore, the present invention was created to solve the problems of the past, and aims to provide a multiple cable installation jig and multiple cable installation method that can efficiently install multiple cables on a cable rack.

The first means of the present invention to achieve the above-mentioned objective is a multiple cable laying jig that lays multiple cables C simultaneously on a cable rack P, and is equipped with a laying body 10 having a length between the parent girders P1, a connector 40 that connects the ends of multiple cables C to the laying body 10, a rope-like towing device 50 that tows the laying body 10, and a movable engagement body 20 that is provided at both ends of the laying body 10 and engages with the upper surface of the parent girders P1 in a freely movable manner.

The second means is a fall prevention device 30 that is provided on the installation body 10 and abuts against the inner surface of the parent girder P1 to prevent the installation body 10 from falling off the parent girder P1.

The moving engagement body 20 of the third means is equipped with a rotating roller 23 that rotates along the upper surface of the parent beam P1.

The moving engagement body 20 of the fourth means includes a connecting portion 21 that connects the ends of the installation body 10 and is positioned inside the parent girder P1, and a locking portion 22 that is bent from the connecting portion 21 to the upper surface side of the parent girder P1, and the rotating roller 23 is provided on the locking portion 22.

The fifth means, the fall prevention device 30, is configured to engage with the inside of a recess P1a with a roughly U-shaped cross section formed on the upper inside part of the parent beam P1.

The sixth means, the fall prevention device 30, is equipped with a contact roller 32 that contacts the inner surface of the parent beam P1.

The seventh means, the fall prevention device 30, comprises a base plate 31 that is provided along the inside of the parent beam P1 and connected to the moving engagement body 20, and a contact roller 32 that is provided on the base plate 31 and contacts the inner surface of the parent beam P1. The position of the base plate 31 that is connected to the moving engagement body 20 is freely adjustable, and the contact position of the contact roller 32 is adjustable.

The eighth means, the installation body 10, is a pair of overlapping cylindrical bodies of different diameters that are arranged to be freely adjustable in length.

The ninth means is a multiple cable laying method for simultaneously laying multiple cables C on a cable rack P, which involves providing a laying body 10 that moves along the upper surfaces of the parent girders P1, connecting the ends of multiple cables C to the laying body 10, and pulling the laying body 10 along the upper surface of the parent girders P1 to simultaneously lay multiple cables C on the child girders P2.

According to the present invention, multiple cables can be efficiently laid on a cable rack, there is no risk of damaging the cables even if they are already laid on the sub-girders, and the cables can be easily laid even when there are many cables or the distance along the line is long.

FIG. 2 is a perspective view showing a wearing state of the present invention. FIG. 2 is a plan view showing a mounting state of the present invention. FIG. 2 is a front view showing a wearing state of the present invention. FIG. 2 is a side view showing the mounting state of the present invention. FIG. 4 is an enlarged view of a main portion showing a movable engagement body and a fall-off prevention device according to the present invention. FIG. 2 is a perspective view showing a main part of a movable engagement body and a fall-off prevention device according to the present invention. FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a front view showing the installation body and the movable engagement body of the present invention. FIG. 2 is a plan view showing the installation body and the movable engagement body of the present invention. 13A and 13B are plan views of the main part showing position adjustment using an adjustment hole. FIG. 2 is a side view showing the connector of the present invention.

The cable installation tool of the present invention is used when simultaneously installing multiple cables C on a cable rack P supported on a ceiling or other surface, and is equipped with a cable installation body 10, a movable engagement body 20, a fall prevention device 30, a connecting device 40, and a towing device 50 (see Figure 1).

The installation body 10 is tubular and has a length between the parent girders P1, and is connected to the mobile engagement body 20 and connector 40 (see FIG. 7), which will be described later. The installation body 10 shown in the figure is made by slidingly stacking a pair of square tubes with different diameters, allowing for free length adjustment. That is, the small tube 12 is slidably housed inside the large tube 11, and the length of the installation body 10 is adjusted by aligning it with the adjustment holes 11a and 12a drilled on the sides of each tube with the length adjustment pin 13.

The movable engagement body 20 is a member provided at both ends of the installation body 10, and engages with the upper surface of the parent girder P1 to be freely movable (see Figure 6). At this time, the movement of the movable engagement body 20 is facilitated by a number of rotating rollers 23 provided on the movable engagement body 20.

The illustrated movable engagement body 20 has a connecting portion 21 and a locking portion 22 formed of a metal plate material, and a rotating roller 23 is provided on the locking portion 22 (see FIG. 8). That is, the connecting portion 21 is formed with a substantially L-shaped side that connects the ends of the cable installation body 10 and is placed inside the parent girder P1. The connecting portion 21 has an adjustment hole 21a for connecting a fall prevention device 30 (see FIG. 9). The locking portion 22 is bent from the connecting portion 21 to the upper surface side of the parent girder P1, and a rotating roller 23 is provided on the locking portion 22 (see FIG. 8). It is preferable that the rotating roller 23 is made of resin or rubber so as not to damage the cable rack P.

The fall prevention device 30 is a member that prevents the installation body 10 from falling off the parent girder P1 by abutting against the inner side of the parent girder P1 (see Figure 5). The illustrated fall prevention device 30 is connected to the connecting part 21 of the moving engagement body 20 so that its position can be freely adjusted, and includes a base plate 31 and a contact roller 32. That is, the base plate 31 is a plate-shaped member that is provided along the inside of the parent girder P1 and connected to the connecting part 21 (see Figure 6). The contact roller 32 is provided on this base plate 31, and prevents the installation body 10 from falling off by abutting against the inner side of the parent girder P1.

Furthermore, the contact roller 32 shown in the figure is positioned so that it contacts the inside of a recess P1a with a roughly U-shaped cross section formed on the upper inside part of the parent beam P1 (see Figure 5).

To release this fall prevention device 30 from the parent girder P1, it is necessary to change the position of the contact roller 32 that is in contact with the parent girder P1 so that the contact roller 32 moves away from the parent girder P1. For this reason, the position of the contact roller 32 is adjusted together with the base plate 31 connected to the connecting portion 21 of the moving engagement body 20 (see Figure 6). Therefore, the moving engagement body 20 can be attached even from the middle of the parent girder P1 using the knob bolt 24.

In the illustrated example, an adjustment hole 21a having a planar L-shape is formed in the connecting portion 21 of the movable engagement body 20, and the base plate 31 of the fall prevention device 30 is connected by a knob bolt 24 that passes through this adjustment hole 21a (see FIG. 9). Then, by moving this knob bolt 24 along the adjustment hole 21a, the position of the contact roller 32 moves together with the base plate 31 connected to the knob bolt 24. In addition, there are multiple shapes of the parent girder P1 of the cable rack P. Multiple adjustment holes 21a are formed so that adjustments can be made even if the parent girder P1 has a different shape.

When the knob bolt 24 is moved from the right side of FIG. 10(a) along the adjustment hole 21a to the left side, the base plate 31 moves with the knob bolt 24, and the contact roller 32 provided on the base plate 31 moves away from the parent beam P1. On the other hand, when the knob bolt 24 is moved from the left side of FIG. 10(b) along the adjustment hole 21a to the right side, the base plate 31 moves with the knob bolt 24, and the contact roller 32 provided on the base plate 31 comes into contact with the parent beam P1.

The connector 40 is a member that connects the cable C and the towing tool 50 to the cable installation body 10 (see FIG. 1). The connector 40 shown in the figure is a fixed body 41 with a U-shaped side and a connector 42 connected to it (see FIG. 2). The fixed body 41 is attached to the outer periphery of the cable installation body 10, and the cable C and the towing tool 50 are connected via the connector 42 fixed to the fixed body 41 (see FIG. 1). The indexing tool 50 is generally a wire rope or the like. In this case, an eye bolt and an eye nut are used as the connector 42, and the connector 42 is fixed to the fixed body 41 by screwing them together (see FIG. 11). An untwisting jig may also be attached to the connector 42.

Next, to use the installation jig of the present invention, first place the movable engagement body 20 on the parent girder P1 of the cable rack P (see Figure 2). Then, operate the knob bolt 24 of the movable engagement body 20 to adjust the contact roller 32 of the fall prevention device 30 so that it contacts the inside surface of the parent girder P1 (see Figure 10 (b)). Then, the rotating roller 23 of the movable engagement body 20 contacts the top surface of the parent girder P1, and the contact roller 32 of the fall prevention device 30 contacts the inside of the parent girder P1 (see Figure 3).

In this state, the ends of multiple cables C are connected to the connector 40, and the towing tool 50 is connected to the connector 40 (see Figure 1). Then, when the towing tool 50 is pulled and the moving engagement body 20 moves over the parent girder P1, multiple cables C are laid simultaneously on the child girder P2. At this time, the cable laying body 10, cables C, and connector 40 move inside the cable rack P, so when the cable rack P is viewed from the side, it appears that only the moving engagement body 20 is moving (see Figure 4). Therefore, even if the cable rack P is installed in a narrow position in the ceiling, the work of laying the cables C on the cable rack P is easy.

The laying method of the present invention uses a laying body 10 that moves along the upper surfaces of the parent girders P1. That is, the ends of multiple cables C are connected to the laying body 10. Next, this laying body 10 is pulled along the upper surface of the parent girder P1. In this way, multiple cables C are laid simultaneously on the child girder P2. As a result, even if a cable C has already been laid on the child girder P2, a new cable C can be laid on the child girder P2 without damaging the cable C.

The embodiments of the present invention are not limited to the illustrated examples. For example, the cable rack P can be applied to cable racks P that are curved or inclined, not just straight as in the illustrated example, and design changes such as changes to each component part and the type of cable to be laid can be freely made within the scope of the present invention without changing its gist.

C Cable P Cable rack P1 Parent girder P1a Recess P2 Child girder 10 Laying body 11 Large pipe 11a Adjustment hole 12 Small pipe 12a Adjustment hole 13 Length adjustment pin 20 Moving engagement body 21 Connecting portion 21a Adjustment hole 22 Locking portion 23 Rotating roller 24 Knob bolt 30 Fall prevention device 31 Base plate 32 Contact roller 40 Connecting device 41 Fixed body 42 Connecting body 50 Towing device

Claims (9)

A multiple cable installation jig that simultaneously installs multiple cables on a cable rack, characterized by comprising a cable installation body having a length between the parent girders, a connector that connects the ends of multiple cables to the cable installation body, a rope-like towing device that tows the cable installation body, and a movable engagement body that is provided at both ends of the cable installation body and engages with the upper surface of the parent girders in a freely movable manner. The multiple cable installation jig according to claim 1, further comprising a fall prevention device that abuts against the inner surface of the parent girder and prevents the installation body from falling off the parent girder. 3. A multiple cable installation jig according to claim 1, wherein the movable engagement body includes a rotating roller which rotates along the upper surface of the parent beam. The multiple cable installation jig according to claim 3, wherein the movable engagement body includes a connecting part that connects the ends of the installation body and is positioned inside the parent girder, and a locking part that is bent from the connecting part toward the upper surface of the parent girder, and the rotating roller is provided on the locking part. The cable multiple installation jig according to claim 2, wherein the fall prevention device is configured to engage with the inside of a recess having a roughly U-shaped cross section formed on the upper inside part of the parent beam. The cable multiple installation jig according to claim 2 or 5, wherein the fall prevention device is provided with a contact roller that contacts the inner surface of the parent beam. The cable multiple installation jig according to any one of claims 2, 5, and 6, in which the fall prevention device comprises a base plate that is provided along the inside of the parent girder and connected to the moving engagement body, and a contact roller that is provided on the base plate and contacts the inside surface of the parent girder, and the position of the base plate that is connected to the moving engagement body is freely adjustable, and the contact position of the contact roller is adjusted. The cable laying jig according to any one of claims 1 to 7, in which the cable laying body is a pair of overlapping cylindrical bodies of different diameters, and the length of the cable laying body is adjustable. A multiple cable installation method for simultaneously installing multiple cables on a cable rack, comprising the steps of: providing a installation body arranged to move along the upper surfaces of the parent girders; connecting the ends of multiple cables to the installation body; and pulling the installation body along the upper surfaces of the parent girders to simultaneously install multiple cables on the child girders.