Low-voltage cable installation tool and installation method

Abstract

To provide a weak electric cable installation jig capable of improving work efficiency for installing a weak electric cable on a vertical cable rack.SOLUTION: An installation jig 1 is provided that naturally falls along a guide wire W. The guide wire W is stretched over and under a vertical cable rack P. A cable C to be installed on the vertical cable rack P is connected to the installation jig 1. A wire insertion jig 2 for inserting the guide wire W is provided on the installation jig 1. A cable connector 3 for connecting the cable C is provided in the installation jig 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a low-voltage cable installation jig and method that utilizes a wire as a guide when installing a low-voltage cable on a vertical cable rack. [Background technology]

[0002] Conventionally, when installing a low-voltage cable on a vertical cable rack, the cable is generally hung from above. However, since the low-voltage cable is light and flexible, the tip of the cable tends to bend easily.

[0003] As a result, when low-voltage cables were hung and laid, the curved ends of the cables often passed between the sub-girders of the cable rack or were unable to pass through the penetration frame, making the work inefficient.

[0004] Meanwhile, Patent Document 1 describes a mobile cable laying system that lays a low-voltage cable from the bottom to the top of a vertical cable rack. In this system, the cable 2 is connected to a driving rope 12 used as a guide and laid. In other words, a plurality of connectors 14 are attached in advance to the driving rope 12 that is drawn out downward. Meanwhile, a first cable grip 3 is covered at the tip side of the cable 2, and a second cable grip 4 is also covered at the middle part of the cable 2.

[0005] Then, the first cable grip 3 and the second cable grip 4 on the cable 2 side are connected to the connector 14 of the driving rope 12 drawn out downward, thereby connecting the cable 2 to the driving rope 12. When the driving rope 12 is lifted in this state, the cable 2 moves from below to above the vertical cable rack along the driving rope 12. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2013-220001 A Summary of the Invention [Problem to be solved by the invention]

[0007] In the mobile cable laying system described in Patent Document 1, the cable 2 is laid while being pulled up, so a winch and a drive rope for winding up the winch must be prepared for laying a lightweight low-voltage cable. Therefore, a large-scale device is required for laying a low-voltage cable.

[0008] In order to connect the cable 2 to the driving rope 12 used as a guide, it is necessary to attach a plurality of connectors 14 to the driving rope 12 in advance. Furthermore, it is also necessary to cover the cable 2 in advance with the first cable grip 3 at the tip side and the second cable grip 4 at the middle part of the cable 2.

[0009] Therefore, in this system, the installation work of the multiple connecting bodies 14 and the covering work of the first cable grip 3 and the second cable grip 4 require a lot of work.

[0010] On the other hand, in the general work of laying a low-voltage cable while hanging it, for example by hanging it from the upper floors of a building, the curved end of the low-voltage cable may pass between the sub-girders of the cable rack or may not be able to pass through the penetration frame, so it is necessary to place a worker in an intermediate position to monitor it.

[0011] Moreover, the location of the vertical cable racks in a building can be dark and poorly visible, making it difficult to visually check that the cables are installed correctly.

[0012] Therefore, the present invention has been created to solve the conventional problems, and has an object to provide a low-voltage cable installation jig and installation method that can improve the work efficiency of installing a low-voltage cable on a vertical cable rack. [Means for solving the problem]

[0013] In order to achieve the above object, the first means of the present invention is a vertical cable rack P having a guide wire W stretched above and below the vertical cable rack P, and a cable C is laid on the vertical cable rack P along the guide wire W. By its own weight The installation jig 1 is movable by dropping, and includes a wire insertion tool 2 through which a guide wire W is inserted, and a cable connector 3 through which a cable C is connected.

[0014] The wire insertion device 2 of the second means is annular with an opening / closing gate 2A for introducing the wire, and is arranged to hold the guide wire W above and below along the longitudinal direction of the installation jig 1.

[0015] The cable connector 3 of the third means is provided with rewinders 7 and 8 arranged at the upper end of the cable installation jig 1 .

[0016] The fourth means is provided on the installation jig 1 with a buzzer 4 for notifying the position to which the installation jig 1 has been moved.

[0017] The fifth means is to provide light 5 on said installation jig 1 for indicating the position to which said installation jig 1 has been moved.

[0018] The light 5 of the sixth means is slidably disposed at the lower end of the installation jig 1, and is provided with a cushioning material 6 for absorbing shock when dropped.

[0019] The seventh means is a cable installation method in which a guide wire W is stretched above and below a vertical cable rack P, and a cable C is laid on the vertical cable rack P along the guide wire W, By its own weight This is a cable installation method in which an end of a cable C is connected to a movable installation jig 1 that can be dropped, and the cable C together with the installation jig 1 is dropped by its own weight to be installed on a vertical cable rack P.

[0020] The eighth means is a buzzer 4 provided on the cable installation jig 1 in the cable installation method, which notifies the position to which the cable C has been moved.

[0021] The ninth means is a cable laying method in which a light 5 provided on the cable laying jig 1 indicates the moved position of the cable C.

[0022] The tenth means is a cable laying method in which a single guide wire W is used to lay a cable C on a vertical cable rack P.

[0023] The cable installation jig 1 of the eleventh means is provided with a cable connector 3 for connecting a cable C, and the cable connector 3 is provided with twists 7, 8 arranged at the upper end of the cable installation jig 1, which is a cable installation method.

[0024] A twelfth aspect of the present invention is the cable laying method, in which two or more guide wires W are used to lay a cable C on a vertical cable rack P. Effect of the Invention

[0025] According to the present invention, the low-voltage cable is laid along the wire, so that it does not pass between the sub-girders of the cable rack or through the through-holes, and as a result, the efficiency of laying the low-voltage cable on the vertical cable rack can be improved.

[0026] Furthermore, safe construction is possible while constantly checking the installation status, and the number of workers required for monitoring on intermediate floors can be reduced, which also leads to reduced labor costs. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is a perspective view showing an embodiment of the present invention. [Diagram 2] FIG. 1 is a side view showing an embodiment of the present invention. [Diagram 3]FIG. 2 is a rear view showing an embodiment of the present invention. [Figure 4] FIG. 2 is a bottom view showing one embodiment of the present invention. [Diagram 5] 1 is a vertical cross-sectional view showing a buzzer of the present invention. [Figure 6] FIG. 2 is a vertical cross-sectional view showing the light of the present invention. [Figure 7] FIG. 2 is an enlarged view of a main portion showing a state in which the present invention is used. [Figure 8] FIG. 2 is a front view showing a state in which the present invention is used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] The present invention relates to a cable installation tool 1 used when installing a low-voltage cable on a vertical cable rack P. That is, the cable is installed together with the cable C along the guide wires W stretched above and below the vertical cable rack P. By its own weight The cable is laid on a vertical cable rack P while moving by dropping (see Figure 8).

[0029] The cable installation jig 1 comprises a wire insertion tool 2 and a cable connector 3 (see Figure 1). The cable installation jig 1 shown in the figure is shaped like a long vertical strip, with the cable connector 3 at its upper end and the wire insertion tool 2 on the plate surface side.

[0030] The wire insertion device 2 is a ring-shaped member, and the guide wire W is inserted through this wire insertion device 2. Therefore, this wire insertion device 2 is formed in a carabiner shape equipped with an opening and closing gate 2A for introducing the wire (see FIG. 4).

[0031] This wire insertion device 2 is configured to hold the guide wire W inserted through it along the longitudinal direction of the installation jig 1, enhancing the stability of the installation jig 1 when it is moved (see Figure 7). The illustrated wire insertion devices 2 are formed as a pair above and below on the same plate surface side (see Figure 2), but the number, shape, position, etc. of the wire insertion devices 2 can be changed as desired.

[0032] The cable connector 3 is an eyebolt-shaped connector that connects the cable C to the cable installation jig 1. The cable C connected to the cable connector 3 is then By its own weight It moves as it falls (see FIG. 8). At this time, the cable connector 3 is provided with return twists 7 and 8 so that it does not rotate and apply a load to the cable C (see FIG. 7). In the illustrated example, it is connected to the cable C via two return twists 7 and 8. A single return twist may also be used.

[0033] The cable C is connected to the upper twisted cable 8 via a cable grip 10 (see Figure 7). To prevent the cable grip 10 from coming loose and causing the cable installation jig 1 to fall, the twisted cable 8 is connected to the side of the cable C with a string-like anti-drop device 11 and further secured with a cable tie 9.

[0034] This installation jig 1 is also equipped with a buzzer 4 that notifies the user of the position to which the installation jig 1 has been moved (see Figure 5). The illustrated buzzer 4 is located in the longitudinal center of the installation jig 1 and is activated by a switch 4A provided on the opposite side of the wire insertion tool 2 (see Figure 3), and is equipped with a battery case 4B above the buzzer 4 (see Figure 5).

[0035] Furthermore, the installation jig 1 is provided with a light 5 that indicates the moving position of the installation jig 1 (see FIG. 6). The illustrated light 5 is slidably disposed at the lower end of the installation jig 1, and is equipped with a cushioning material 6 that protects the side of the tip side of the light 5. Therefore, if an impact is applied to the lower end of the light 5, the light 5 is stored inside the installation jig 1 to absorb the impact, so that the worker can be protected even if it comes into contact with him.

[0036] The guide wire W is stretched above and below the vertical cable rack P in advance (see Figure 8). For example, the guide wire W is fixed to steel material P2 provided on the topmost level of the vertical cable rack P and to steel material P2 provided on the bottommost level. This fixing position and fixing member can be changed as desired. For example, the steel material P2 is hung across an opening formed in the floor or ceiling, and the guide wire W is fixed to this steel material P2. Alternatively, it is possible to stack steel material P2 on top of steel material P2 fixed to the floor, and then fix the guide wire W to the stacked steel material P2.

[0037] The cable laying method of the present invention is a cable laying method using the cable laying jig 1. By its own weight An end of a cable C is connected to a movable installation jig 1, and the cable C is By its own weight This is a laying method in which the cable is dropped and laid on a vertical cable rack P.

[0038] In this method, a buzzer 4 provided on the cable installation jig 1 is used to notify the start or end of installation of the cable C or the approaching state of the cable installation jig 1. Also, a light 5 provided on the cable installation jig 1 is used to confirm the moving position of the cable C.

[0039] The embodiments of the present invention are not limited to the illustrated examples, and design changes are free within the scope of the present invention.

[0040] In the above embodiment, one guide wire W is used, but two guide wires W can be used. In that case, a wire insertion tool 2 may be provided for each guide wire W so that two guide wires W can be passed through the installation jig 1. The installation jig 1 can improve workability by shortening the time required for installation preparation compared to the installation jig 1 using two guide wires W. That is, one guide wire W is preferable because fewer guide wires W require fewer man-hours. In addition, since the low-current cable is light, one guide wire W is sufficient, and installation is easy even in a narrow through hole. In addition, the turnbuckle 3A may be omitted or replaced with a heavier one in order to adjust the weight of the installation jig 1. Furthermore, the installation jig 1 may be pulled from below by a wire instead of by its own weight. [Explanation of symbols]

[0041] C Cable P Vertical Cable Rack P1 Parent column P2 steel material W Guide Wire 1 Cable installation jig 2 Wire Insertion Tool 2A Opening and closing gate 3 Cable connector 3A Turnbuckle 4 Buzzer 4A Switch 4B Battery Case 5 Light 6 Cushioning material 7 Back 8 Back 9 Cable ties 10 Cable Grip 11 Fall prevention equipment

Claims

1. A cable installation jig in which guide wires are stretched above and below a vertical cable rack and which can move by falling under its own weight together with a cable to be laid on the vertical cable rack along the guide wires, the cable installation jig comprising a wire insertion device for inserting the guide wires and a cable connecting device for connecting the cables.

2. 2. The cable installation jig of claim 1, wherein the wire insertion tool is annular and has an opening and closing gate for introducing the guide wire, and is arranged to hold the guide wire above and below along the longitudinal direction of the cable installation jig.

3. 3. The cable installation jig according to claim 1, wherein the cable connector includes a reel disposed at an upper end of the cable installation jig.

4. 3. The cable installation jig according to claim 1, further comprising a buzzer for notifying a position to which the cable installation jig has been moved.

5. 3. The cable installation jig according to claim 1, further comprising a light for indicating a position to which the cable installation jig has been moved.

6. 6. The cable installation jig according to claim 5, wherein the light is slidably disposed at a lower end of the cable installation jig and includes a cushioning material for protecting the light in the event of the light being dropped.

7. A cable laying method in which guide wires are stretched above and below a vertical cable rack and a cable is laid on the vertical cable rack along the guide wires, characterized in that an end of the cable is connected to a laying jig that can move along the guide wire by falling under its own weight, and the cable and the laying jig are laid on the vertical cable rack by falling under their own weight.

8. 8. The cable installation method according to claim 7, further comprising the step of: informing a position to which the cable has been moved by a buzzer provided on the installation jig.

9. 8. The cable installation method according to claim 7, wherein a light provided on the installation jig indicates a position to which the cable has been moved.

10. 10. The method according to claim 7, wherein the cable is laid on the vertical cable rack using one guide wire.

11. 11. The cable installation method according to claim 10, wherein the cable installation jig includes a cable connector for connecting cables, the cable connector including a twister disposed at an upper end of the cable installation jig.

12. 8. The method of claim 7, wherein the cable is laid on the vertical cable rack using two or more guide wires.

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