JPS6122425Y2 - - Google Patents

Description

[Detailed description of the invention] This invention pulls a rope for inserting an electric wire to be connected to one end of a spare net that has been inserted in advance into the electric wire insertion piping installed at civil engineering and construction work sites. This relates to a device for inserting electric wires into piping.

To explain in more detail, piping for inserting electric wires has been laid in advance at civil engineering and construction work sites, and when passing electric wires into the piping, the inside of the pipe is first cleaned with air and a spare net is inserted and placed. A wire insertion rope is tied to the rear end of the spare net, a wiring wire is tied to the tip of the rope, and after the spare net is pulled out from the piping, the spare net and the rope are released.

The present invention relates to a device for subsequently inserting an electric wire into a pipe by pulling a rope for inserting the electric wire into the pipe.

This invention makes it possible to freely adjust the tension of the rope according to the situation at the work site, such as pulling the tension rope strongly to make it go faster and pulling it more slowly to make it slower. The tension on the rope can be stopped by slipping the rope around the outside of the drum while it is wound around the drum, and there is no need to stop the drive motor each time the rope is wound, making it easy to operate and improve work efficiency. It is an object of the present invention to provide a rope pulling device for inserting electric wires into piping, which has a simple structure, is small and lightweight, and is easy to carry at construction sites.

If the device of the present invention is explained with reference to the drawings, the first
As shown in FIG. 2, a gear ring 4 is attached to the shaft 3 of a motor 2 fixed on a frame 1, and bearings 6, 7 are mounted on both upper corners of a support frame 5 suspended from one rear end of the frame 1. is installed, and the drum shaft 10 with the gear 9 attached to the small drum 8 is fitted into the bearing 6 of the support frame 5 so that the small drum 8 and the gear 9 move together with the drum shaft 10. Drum shaft 1 protruding outside of
A gear wheel 11 is attached to the gear wheel 0, and the gear wheel 4 and the gear wheel 12 are interlocked with each other by a roller chain 12.

The gear wheel 14 is fixed to the large drum 13, and the drum shaft 1
A plurality of fitting holes 14A are formed at equal intervals on the outer surface of the tooth ring 14, and a plurality of fitting holes 14A are formed at equal intervals on the outer surface of the tooth ring 14, and below the bearing 7 of the support frame 5, the A clutch case 16 is installed at a location that matches the fitting hole 14A, and as shown in FIGS. 3 and 4, the clutch case 16 constantly presses the clutch pin 18 with a spring 17, and the tip of the clutch pin 18 is formed into an inclined surface 19. However, when the gear wheel 14 rotates in the normal direction, the inclined surface 19 of the clutch pin 18 faces the rotation direction of the gear wheel 14, and the inclined surface 19 of the pin 18 does not fit into the fitting hole 14A. If the clutch slides while being pressed and the gear 14 rotates in the opposite direction, the clutch pin 18 in the clutch case 16 will fit into the fitting hole 14A of the gear 14 and stop the gear 14. Equip.

The gear wheels 14 and 9 are interlocked by a roller chain 20.

The roller chains 12 and 20 are designed so that the pins will break if the load exceeds the capacity of the motor 2.
Each roller chain 12, 20 is set so that the driving motor capacity ≧ the breaking strength of the roller chain.
As shown in FIG. 6, the link plates 21, 21 are connected by each pin 22 and one pin 23 having a weaker breaking strength than the other pins 22, and a split pin 24 is attached to the pin 23, as shown in FIG. do.

Next, to explain how to use the present invention, for example, the tip of the tension rope 25 is tied to a pilot wire (spare net) when laying a power transmission line in the pipe A, and the rear end of the tension rope 25 is attached to the large drum 13. Wind the rope 2 to 3 times, hold the rear end of the tension rope 25 by hand,
When the power is connected to the motor 2, the gear wheel 4, the gear wheels 11 and 9 of the drum shaft 10 that interlock with this gear, and the small drum 8
rotates, the gear 14 of the drum shaft 15 which is interlocked with the gear 9 through the chain 20 rotates, and the large drum 13 rotates in conjunction with the gear 14.

The tension rope 25 wound around the large drum 13 is wound around the large drum 13, and when the rope 25 is pulled strongly, the contact resistance of the rope 25 wound around the large drum 13 with the large drum 13 increases. The rope 25 is pulled well, and when the pulling force of the rope 25 is relaxed, the rope 25 wound around the large drum 13 slips on the outer periphery of the large drum 13, so that the rope 25 is not pulled too much.

Therefore, by tightening or loosening the tension on the rope 25, the rope 25 can be pulled faster or slower.

Also, if it is long enough to hold the rope 25 lightly,
The rope 25 wound around the large drum 13 is attached to the drum 13.
The rope 25 is not pulled at a length that slips on the outer periphery of the rope 25, and the rope 25 stops pulling.

Next, if you want to increase the rope pulling speed, wind the rope 25 around the large drum 13 2 to 3 times, then wind the rope 25 around the small drum 8 4 or 5 times, and pull the rope 25 by hand. , the slip of the rope 25 is reduced and the rope 25 is pulled faster.

If the drums 13, 8 attempt to rotate in the opposite direction for some reason, the clutch pin 18 fits into the fitting hole 14A of the gear 14, thereby preventing the drums from rotating in the opposite direction.

As described above, the present invention is capable of pulling the rope 25 while pulling the tension rope wound around the drum, and adjusting the tension of the rope 25 strongly or weakly to suit the current situation. It can be adjusted freely by pulling or loosening it.
Furthermore, even when the rope 25 is stopped, the length of the rope 25 held without being pulled is not retracted, and the rope 25 wound around the drum slips, so there is no need to stop the motor 2 each time. And rope 2
5 is not wound onto a drum, so the length of the rope is unlimited. Moreover, the pulling speed of the rope 25 can be increased by winding the rope 25 around both the large and small drums 13 and 8, so that the rope pulling speed can be changed in two steps.

According to the above-described operation, the electric wire connected to the rope 25 can be smoothly and easily inserted into the pipe without any trouble and without disturbing the coating film.

Furthermore, since the present invention does not have a speed reduction mechanism in the drive motor, maintenance and inspection are easy, the overall weight is lighter than the conventional one, and it has the advantage of being easy to carry at each work site.

In addition, in the present invention, among the pins 22 provided on the link plate 21 at each joint of the roller chains 12 and 20, the only pin 23 has a lower breaking strength than the pin 22, so that the split pin 24 is fixed. Therefore, if the traction force of the rope 25 wound around the drums 13 and 8 exceeds the capacity of the drive motor, the pin 23 in the roller chain 20, which has a weak breaking strength, will be cut. The motor 2 is protected and the drum shafts 15, 10 are pulled
It is also possible to prevent deformation of.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is a plan view, Fig. 2 is a front view, Fig. 3 is a left side view with some parts of Fig. 2 omitted, and Fig. 4 is a diagram showing the gear ring and clutch. FIG. 5 is a perspective view showing the state of use, and FIG. 6 is an explanatory view showing a part of the roller chain. 1...Frame, 2...Motor, 3...Axis,
4...Gear ring, 5...Support frame, 8...Small drum, 9
...Tooth ring, 10...Drum shaft, 11...Tooth ring, 1
2...Roller chain, 13...Large drum, 1
4...Gear ring, 20...Roller chain, 21...
...Link plate, 22...Pin, 23...Pin with low breaking strength, 24...Cotter pin, A...Piping.

Claims (1)

[Scope of utility model registration request] A large drum 13 formed by fixing a gear ring 14 to a drum shaft 15 on a support frame 5 suspended above the frame 1;
A small drum 8 consisting of a gear ring 9 fixed to a drum shaft 10
are connected and rotatably supported by a roller chain 20, and a gear ring 11 fixed to one end of the drum shaft 10.
and a gear wheel 4 fixed to the shaft 3 of the drive motor 2.
are rotatably connected by a roller chain 12, and the roller chains 12, 20 are connected by each pin 22 used for connecting each link plate 21 and the only pin 23 whose breaking strength is weaker than this, and the teeth are A clutch device is provided that stops when the wheel 14 rotates in the opposite direction, and the rope 25 is wound around the drum.
A rope pulling device for inserting an electric wire into piping, which is characterized by adjusting the tension of the rope while reeling the rope.