JPH0667081B2 - Cable wiring method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an improvement in a method of laying a cable under the ceiling or under the floor.

[Prior Art] When a cable such as a telephone line or a power line is newly laid in a room, the cable is laid under the ceiling or under the floor so that the cable is not exposed to the room.

When newly wiring the space above the ceiling or under the floor in this way, the worker enters the space above the ceiling or below the floor to perform the wiring.

However, the space above the ceiling and below the floor is small, and the worker must be hungry to work, especially when wiring above the ceiling. It was extremely troublesome.

For this reason, conventionally, as shown in FIG. 9, an outlet 2 having an inner diameter that is about twice the diameter of the cable 1 is preliminarily opened in a ceiling plate 3 at a place where the equipment is installed, and the ceiling 2 is opened from this outlet 2. The cable 1 is pushed into 6 and piled up in a spiral shape.

On the other hand, the operator 5 puts the upper half of the body in the ceiling back 6 from the inspection port 4 which is located away from the pulling port 2 and directs the retractable fishing rod-shaped hooking rod 7 in the ceiling back 6 toward the pulling port 2 side. Extend the tip to. Then, after hooking the cable 1 that is spirally stacked with the hook 8 at the tip of the hooking rod 7 and lifting it, the cable 1 was pulled up to the inspection port 4 and wired while shrinking the hooking rod 7.

However, since the tip of the fishing rod-shaped hooking rod 7 is bent, it is difficult to reach the inspection port 4 by hitting an obstacle such as the beam 9 on the ceiling 6 and even if the cable 1 is hooked by the hook 8 at the tip. Since it often comes off from the hook 8 on the way of coming in, it requires skill in wiring work and is troublesome.

[Problems to be Solved by the Invention] The present invention has been made in view of the above point, and even if there are obstacles such as beams in a narrow ceiling or under the floor, the cable is easily routed to significantly improve workability. The present invention provides such a cable wiring method.

MEANS FOR SOLVING THE PROBLEM The present invention is made of a synthetic resin in which a valve is provided inside a cylindrical body having an air blowing port at one end and a tube mounting portion at the other end, and the front end is closed and the rear end is opened. The open end of the soft tube is attached to the tube mounting part of the cylinder to form a guide rod, and this guide rod is put under the ceiling or under the floor from the inspection port and air is passed through the valve from the air blowing port of the cylinder. Blow into the soft tube to inflate the soft tube to form a straight shape, insert a hooking tool under the ceiling or under the floor from the cable outlet provided at a place apart from the inspection port, and inflate it straight into this hooking tool. After the end of the soft tube is hooked, the valve of the cylindrical body is opened to release the air in the soft tube, and then the tip of the soft tube hooked on the hooking tool is pulled out from the outlet, and the soft tube pulled out is Connect the cable to the tip After continuing, the guide rod is pulled in the opposite direction and pulled out from the inspection port, and the cable connected to the tip of the soft tube is pulled under the ceiling or under the floor for wiring.

[Examples] Hereinafter, the present invention will be described in detail with reference to the examples shown in the drawings.

FIGS. 1 to 6 show an embodiment of the present invention. As shown in FIG. 4, the cylindrical body 10 is open at both ends, and an air blowing port 11 is formed at one end side thereof and the other end side thereof is formed. A tube mounting portion 12 having a slightly smaller outer diameter is formed, and a holding ring 13 is detachably attached to the tube mounting portion 12.

Further, a partition plate 14 is provided in the middle of the tubular body 10, and an air supply port 15 and an exhaust port 16 are opened here, and valves 17 and 18 are provided so as to close them.
Is installed.

A valve opening / closing button 19 is mounted on the upper surface of the cylindrical body 10 so as to be vertically movable so as to press the valve 18 on the exhaust port 16 side.

Reference numeral 21 denotes a soft tube, which is a thin polyethylene bag having a length of about 6 to 8 m and a diameter of about 50 mm, and has a closed front end and an open rear end. The open end of the soft tube 21 is removed from the pressing ring 13 of the cylindrical body 10 and covered with the tube mounting portion 12, and then the pressing ring 13 is fitted again to be connected to the guide rod 20.
To form.

Further, as shown in FIG. 5, the hook 22 is configured as a flashlight by attaching a lens 24 to the tip of a cylindrical grip portion 23 accommodating a battery and providing a light bulb 25 inside the grip portion 23. A hook portion 26 formed by bending a metal wire having a spring property is attached to the tip of the.

The hook portion 26 has a central portion curved in an inverted U shape, a circular portion 27 is provided at the lower portion thereof, and both ends thereof are bent.
8 is formed and these parts are crossed in the opposite direction to form a needle threader shape.In a free state, the circular portion 27 is sufficiently larger than the outer diameter of the soft tube 21, and the circular portion 27 When it is compressed, it extends vertically and becomes thinner.

Next, a method for wiring the cable 1 to the ceiling 6 will be described.

As shown in FIG. 1, an outlet 2 having a diameter about twice the diameter of a cable 1 to be wired is opened in a ceiling plate 3 above a place where a device such as a telephone is installed indoors.

Next, the inspection port 4 of the ceiling 6 is opened and the worker 5 guides the guide rod 20.
Hold and hold the upper body. At this time, the soft tube 21 of the guide rod 20 is in a tape shape in a contracted state.

Next, the air inlet 11 of the cylinder 10 held in hand is applied to the mouth of the worker 5, and air is blown toward the outlet 2, and the valve 17 of the air inlet 15 is set as shown in FIG. The air was blown into the soft tube 21 by opening it to the soft tube 21
Gradually expands into a balloon and extends straight into a cylindrical shape.

On the other hand, as shown in FIG. 2, when another worker 5 holds the hooking tool 22 in his / her hand from below the outlet 2 and inserts it from the outlet 2,
The hook portion 26 extends in a slender shape and passes through the outlet 2, and the ceiling 6
Then, as shown in FIG. 5, it spreads and becomes a circular shape.

At this time, the light bulb 25 is turned on to illuminate the ceiling 6 and the operator 5 at the inspection port 4 aims at the circular portion 27 of the hook 22 while watching the light and inserts the tip of the swollen soft tube 21. . In this case, since the soft tube 21 bulging like a balloon is flexible and can be bent even if it hits an obstacle such as the beam 9 of the ceiling ceiling 6, it is straightly extended straight and does not bend. It can be easily inserted into the circular portion 27 of.

When the tip of the soft tube 21 is inserted into the circular portion 27 of the hook 22 and the hook 22 is lowered, the circular portion 27 of the metal wire is deformed and the soft tube 21 is sandwiched therebetween.

In this state, the valve open / close button attached to the tubular body 10 of the guide rod 20.
When the valve 19 is raised, the pressing of the valve 18 is released, the air in the soft tube 21 having a high internal pressure is discharged from the exhaust port 16, and the air escapes and shrinks, as shown in FIG.

After that, when the hooking tool 22 is lowered and the hooking portion 26 is pulled out from the pulling outlet 2, the deflated soft tube 21 is pulled out into the room while being sandwiched by the hooking portion 26.

Next, after removing the tip of the soft tube 21 from the hook 22,
The tip of the cable 1 is bound by the tip of the soft tube 21 and connected to obtain the state shown in FIG.

After this, when the worker 5 at the inspection port 4 pulls the guide rod 20,
When the cable 1 connected to the end of the tape-shaped soft tube 21 is drawn into the ceiling back 6 from the outlet 2, and the guide rod 20 is further pulled out from the inspection port 4, the cable 1 is moved to the ceiling as shown in FIG. Wired in the back 6. When the tip of the cable 1 is pulled to the inspection port 4, the soft tube 21 is removed and the cable 1 is connected to another cable to complete the wiring.

Therefore, tie the cable 1 with the soft tube 21 and
Since it is pulled inside, it does not come off on the way, and the beam 9
Even if there are obstacles such as the above, wiring can be performed easily, and the working time can be greatly shortened as compared with the conventional method.

An optical fiber may be used instead of the metal wire forming the hooking portion 26, and the hooking portion 26 itself may emit light.

FIG. 7 and FIG. 8 show another structure of the hook 22. An adjusting rod 29 is provided at the tip of a two-step cylindrical gripping portion 23 so as to be extendable and contractible, and a strip plate 30 having a spring property is provided. The tip of the rotatably connected to the adjusting rod 29,
The lower end of the strip plate 30 in 23 is connected to a coil spring to form a measure so that it can be wound up. Reference numeral 31 is a light attached to the tip of the adjusting rod 29.

In this hooking tool 22, the length of the adjusting rod 29 is adjusted according to the thickness of the ceiling board 3, and when the strip 30 is pulled out and inserted from the outlet 2, a circular portion 27 is formed within the ceiling back 6 to form a circular portion 27. The tip of the soft tube 21 is inserted here.

When the end of the soft tube 21 is hooked by the hook portion 26, the band plate 30 is rewound, and when air is removed, as shown in FIG. It can be easily pulled out from the outlet 2 by being sandwiched between the triangular gaps. In the above description, the case where the wiring is provided on the ceiling 6 is shown, but the wiring under the floor can be made in the same manner.

[Effects of the Invention] As described above, according to the cable wiring method of the present invention, a slender soft tube is inflated like a balloon in the back of the ceiling and extended to the outlet, where the tip of the soft tube is hooked by a hook and the inside Draw out the air from the outlet and use this as a guide to connect the tip of the cable here and pull it backwards and wire inside the ceiling, so even if there are obstacles such as beams in the narrow ceiling or under the floor, Wiring can be performed reliably and in a short time without requiring skill, and workability can be greatly improved.

[Brief description of drawings]

1 to 3 are explanatory views showing a method of wiring under the ceiling according to the method of the present invention in order of steps, FIG. 4 is a sectional view of a guide rod, FIG. 5 is a front view of a hooking tool, and FIG. The front view of the hooking tool showing the state of hooking and pulling out the soft tube, No. 7
FIG. 8 is a perspective view of a hooking device having another structure, FIG. 8 is an explanatory view showing a state in which a soft tube is pulled out by the hooking device of FIG. 7, and FIG. 9 is a cable using a conventional fishing rod-shaped hooking rod. It is explanatory drawing which shows the state which is hanging up. 1 ... Cable, 2 ... Drawout port 4 ... Inspection port, 5 ... Worker 6 ... Attic, 7 ... Hooking rod 10 ... Cylindrical body, 11 ... Air inlet port 15 ... Air supply port, 16 ... Exhaust port 20 ... Guide Rod, 21 ... Soft tube 22 ... Hooking tool, 23 ... Gripping portion 26 ... Hooking portion, 27 ... Circular portion 29 ... Adjusting rod, 30 ... Strip plate

Claims (1)

[Claims] 1. An open end of a soft tube made of synthetic resin, which is provided with a valve inside a cylindrical body having an air blowing port at one end and a tube mounting portion at the other end, and which is closed at the front end and opened at the rear end. A guide rod is formed by attaching it to the tube mounting portion of the cylindrical body, and the guide rod is inserted from the inspection opening to the back of the ceiling or below the floor, and air is blown into the soft tube through the valve from the air blowing opening of the cylindrical body to soften it. Inflate the tube to form a straight shape, insert a hooking tool under the ceiling or under the floor from the cable outlet provided at a location away from the inspection port, and pull the tip of the soft tube inflated straight into this hooking tool. After hanging, open the valve of the cylindrical body to release the air in the soft tube, then pull out the tip of the soft tube hooked on the hook from the outlet and connect the cable to the tip of this drawn soft tube , Reverse the guide rod Pulling the drawer from the inspection port, cabling method characterized in that wiring pulling a cable connected to the distal end of the soft tube to the ceiling or under the floor.