JPH0451935Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is used for cutting and stripping work of lead work such as main lead pipes, auxiliary lead pipes, sealing tapes, etc. coated as connection parts of existing communication cables, etc. This relates to a lead pipe dismantling tool for cable connection.

[Conventional technology]

Generally, when connecting telegraph line cables such as covered wires, the covering is removed and the core wires are connected and processed, and then tape is wrapped around it to protect it from water and corrosion. below,
The conventional method was to cover the pipe with a lead pipe and solder or braze it to seal it and install it.
However, cable accidents, wiring changes, repairs, inspections,
In the case of other necessary construction work, the metal-coated metal pipe at the connection part must be cut and removed using a tool.

Traditionally, dismantling work such as cutting, vertically splitting, and stripping the main and auxiliary lead pipe parts of existing communication cable connections was carried out using a lead machete, a hacksaw, a torch lamp, etc. was the simplest.

In this construction method, if a hacksaw is used, there is a high risk of chips getting into the joints; when opening the lead pipe with a machete, it is unavoidable to apply vibrations and shocks to the joints, and a torch lamp is used. The necessary cutting work must be performed after melting the welded parts such as solder with fire.

[Problem that the invention attempts to solve]

For this reason, it is requested not to use fire such as a burner when working on the cable connection part because there is a risk of a fire accident.If this is followed, it will be extremely difficult to dismantle and remove the lead pipes, Driving a tool into the cable to cut it will not only give a shock to the cable, causing noise during communication and preventing normal transmission, but also because the wall thickness of lead pipes is usually 2 to 6.5 mm.
Even if you use a knife or scissors to cut the cable, it is difficult to perform the cutting operation, it is dangerous to damage the enclosed cable, and the work efficiency is low.Furthermore, there are problems such as chips entering the connection part and having a negative effect on the conductor connection. It was hot.

Therefore, there has been a need for a suitable demolition tool that satisfies strict conditions such as not using fire inside the manhole, not causing vibrations to the cable connections, and not allowing chips to be mixed in.

The present invention eliminates these conventional drawbacks, allows lead pipes to be easily and accurately cut out without using fire or impacting the cable, and produces fewer chips.
Workability that does not require special power such as electricity, greatly shortens and reduces work time and labor compared to conventional construction methods, and also allows for easy centering without damaging the enclosed cable. The purpose is to provide a lead pipe dismantling tool with good cable connections.

[Means for solving problems]

The present invention consists of a grip 25 that holds a lead pipe of a cable connection part, and a fixing rod 1 that is rotatably provided on a bracket 15 provided on the grip 25 with a support shaft 27.
A supporting punch 2 is pivotally connected to the fixed rod 1 by a support shaft 29, an adjustment rod 28 connects one end of the supporting punch 2 to the fixed punch 1 so as to be able to move toward and away from the fixed punch 1, and a supporting punch 2 is pivotally supported on the supporting punch 2. It consists of a movable pestle 3 that is slidably and swingably supported by a pin 26, and the movable pestle 3 is equipped with a blade 4 for cutting a lead pipe and a handle 5 for operation.

[Effect]

With this tool, when cutting off the sleeve of the lead pipe A containing the covering of the cable connection part, for example, the sealing tape B, the fixing rod 1 is fixed by holding the grip 25 on the lead pipe A containing the sealing tape B and tightening it. , the centering of the blade part 4 on the movable rod 3 on the support rod 2 is adjusted by the arrangement of the pivot pin 26, the direction exchange around the support shaft 27, and the displacement of the support rod 2 with the dial 11, and the handle is adjusted. 5, by swinging around the pivot pin 26 and moving it in the axial direction along the guide groove 30, the blade part 4 is pushed into the fixed rod 1 side while cutting into the wall of the lead pipe using leverage. , the lead pipe A can be cut vertically and removed, and in this case, the welded portion can be easily cut off without using a torch or the like to melt it and without giving any impact to the cable.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 3. A fixing rod 1 is provided through a grip 25 to the lead pipe at the cable connection part, and the fixing rod 1 is mounted on a support rod 2 provided on the fixing rod 1. Moving rod 3 moving toward and away from
is slidably and swingably supported by a rod support pin 26, and the movable rod 3 is provided with a blade portion 4 for cutting a lead pipe, and the blade portion of the movable rod 3 is moved on the support rod 2. A handle 5 for pushing and feeding the handle 4 is provided on the moving rod 3.

The fixing rod 1 is pivotally connected to the bracket 15 of the grip 25 by a support shaft 27 so that the direction can be changed.
However, the adjustment rod 28 is connected by the rotation of a dial 11 equipped with a thrust bearing 9 and a positioning member 10, such as a locking mechanism for fitting and removing the ball in a recess using a ball and a spring.
One end of the support rod 2 can be set by moving a slider 18 screwed into the support rod 2 to raise and lower one end of the support rod 2. The support rod 2 is pivotally connected to the fixed rod 1 by a support shaft 29, and is provided with a guide groove 30 for moving the movable rod 3, and the pivot pin 26 is provided in the guide groove 30. The movable rod 3 is connected by movably loosely fitting the pivot pin 26, which is removably provided in one of the plurality of fitting holes 16 provided in the movable rod 3. The centering of the incision position on the lead pipe A including the sealing tape B in the cable of section 4 can be adjusted.

The grip 25 is a ring-shaped band that can be divided into two by a hinge 6 and is equipped with a removable fastening member 7 such as a bolt or nut, but it can be adjusted to fit the diameter of the cable as required. A latching band, such as a flexible band or a chain band, whose ring length can be adjusted by means of the fastening member 7 of engagement between the latching hook and the latching hole or other locking fastening members may be used. In any case, fixing rod 1 is connected to cable lead pipe A.
Any grip can be used as long as it can be set and fixed on the grip. Further, the blade part 4 is replaceably provided on the movable rod 3, and has a sharp point or a claw part so as to be able to cut the lead pipe A, and is selected to be used in a form that is easy to cut.

In the figure, 5 ₁ is the handle grip part, 8 is the cut groove for detaching and removing,
Reference numeral 12 denotes a fastener, which is provided on the grip 25 as necessary so that the amount of protrusion can be adjusted. 13
The cover piece and 14 are mounting holes.

[Effect of idea]

The present invention consists of a grip that holds the lead pipe of the cable connection part, a fixing rod that is rotatable about a support shaft on a bracket provided on the grip, and a support punch that is pivotally connected to the fixing rod by a support shaft. , an adjustment rod that connects one end of the branch punch to a fixed punch so as to be able to move toward and away from the fixed punch, and a movable punch that is slidably and swingably supported on the branch punch by a pivot pin; The blade part for cutting the lead pipe and the operation handle are installed in the pipe, so that the cutting edge bites into the covering of the cable connection part and pushes it open to cut it.There is no generation of chips, and the cutting process is simple and smooth. It allows for efficient wiring work as it can be used to perform tearing work without disturbing the wire connection, the blade part is easy to bite into, the coating is easy to peel off, and the work can be done even while transmitting without giving any vibration or impact to the cable. In addition, the workability is extremely good, the burden on the worker is greatly reduced, there is no risk of an accident worse than a fire, and wiring work can be carried out safely even in extremely narrow manholes and culverts.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is a side view, FIG. 2 is a front view cut along the line of FIG. 1,
FIG. 3 is a side view showing the state of use. 1... Fixed rod, 2... Support rod, 3... Movable rod, 4
...Blade, 5...Handle, 6...Hinge, 7...
... Fastening member, 11 ... Dial, 12 ... Fastener, 15 ... Bracket, 25 ... Grip, 2
6... Pivot pin, 27, 29... Support shaft, 28...
Adjustment rod, 30...Guide groove.

Claims (1)

[Scope of claim for utility model registration] (1) Grip 2 that holds the lead pipe at the cable connection part
5, and a bracket 15 provided on the grip 25.
A fixed rod 1 is rotatably provided on a support shaft 27, and a support rod 2 is pivotally connected to the fixed rod 1 through a support shaft 29.
, an adjustment rod 28 that connects one end of the supporting punch 2 to the fixed punch 1 so as to be able to move toward and away from the fixed punch 1, and a movable punch 3 that is slidably and swingably supported on the supporting punch 2 by a pivot pin 26. A lead pipe disassembly tool for cable connection, characterized in that the movable rod 3 is provided with a blade part 4 for cutting the lead pipe and an operating handle 5. (2) The scope of the utility model registration claim, in which the fixed rod 1 is provided with an adjustment rod 28 with a dial 11, and the adjustment rod 28 is connected to one end of the support rod 2 via a slider 18. The lead pipe dismantling tool described in paragraph 1. (3) The utility model according to claim 1 or 2, wherein the movable rod 3 is slidably supported by a pivot pin 26 in a guide groove 30 provided in the support rod 2. Lead pipe dismantling tools. (4) The lead pipe dismantling tool according to claim 3, wherein the pivot pin 26 is removably provided in a plurality of fitting holes 16 provided in the movable rod 3. . (5) Utility model registration claim 3, wherein the grip 25 is a ring-shaped band that can be divided into two by a hinge 6 or a latching band whose length can be adjusted, and is equipped with a removable fastening member 7. The lead pipe dismantling tool described in paragraph 4 or paragraph 4.