JPH056009Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention protects the connection part of a communication cable installed in underground pipes by covering the connection part, for example, when inspecting or repairing the connection part. Cut the lead pipe,
The present invention relates to a pipe beveling machine suitable for use in cutting.

[Prior Art] Generally, the structure of the connection between communication cables is as shown in FIG.
Wrap the string d, etc., and attach the end of the rubber pipe a to the auxiliary lead pipe e.
The main lead pipe f is sheathed around the connection part c, and both ends f' and f' of the main lead pipe f are heated and melted with a torch lamp, etc., and the auxiliary lead pipe e is , e and welded together.

Conventionally, when inspecting or repairing the above-mentioned connections, a torch lamp was used to inspect both ends f',
After heating f', both ends of the main lead pipe f are opened using a tool, but there is a risk of fire if a torch lamp is used in this way.

Therefore, a method has now been proposed in which the cable connection part c is housed in an easily openable and closable synthetic resin box to protect it instead of being covered and protected by the lead pipe described above. ,
Since the cable is protected by a lead pipe, the conventional method of dismantling the lead pipe using a torch lamp to replace it with a synthetic resin box poses a risk of fire and can easily damage the rubber sheath of the cable. There is a problem with this.

[Problems to be solved by the invention] This invention attempts to solve the above-mentioned conventional problems.It is possible to make cuts in existing lead pipes without damaging the cables, and it is safe and easy to work with. The aim is to provide a pipe beveling machine that can be easily dismantled.

[Means for solving the problem] In other words, the present invention is to attach and detach a rotary blade with a cut depth adjustment ring removably attached to the end of the rotary shaft via the drive shaft and chuck of the main body with a motor inside. At the same time, a fixing ring is attached to the cylindrical end of the main body so as to be detachable and movable in the circumferential direction, and a protective cover for the rotary blade is pivotally attached to the fixing ring and extends forward. A rotatable guide roller that comes into contact with the non-cutting material and a transparent cover are provided at the tip and base ends of the cover, respectively, and the protective cover is biased by a spring in a direction in which the guide roller comes into contact with the pipe body. , the above problems were solved.

[Embodiment] Hereinafter, the embodiment of the present invention will be described in detail based on the drawings. As shown in FIGS. 1 to 3, the main body 1
A motor and a gear reduction mechanism (not shown) are housed inside a cover 2 with a handle 2a that constitutes its outer shell, and a chuck 3 is disposed at the tip of a drive shaft (not shown) that rotates in conjunction with the rotation of the motor. There is.

As the main body 1, a known electric drill can be used.

A rotary shaft 4 is removably attached to the chuck 3, and the chuck 3 has a rotary shaft 4 attached to the rotary shaft 4 with its inner surface abutting against a cutter receiving seat 5 fixed to the tip of the rotary shaft 4. The blade 6 and the cutting depth adjustment ring 7 are removably fixed via a presser washer 8 with a tightening screw 9, whereby the rotary blade 6 and adjustment ring 7 are driven and rotated by the motor. .

A cylindrical portion 10 protruding concentrically with the chuck 3 at the tip of the cover 2 of the main body 1 is rotatably fitted with a fixing ring 11. The proximal end 13a of the protective cover 13 of the blade 6 is pivoted around a fulcrum shaft 14 so as to be rotatable in the direction of arrow g←→g in FIG.

That is, the protective cover 13 has approximately 1/4 of the rotary blade 6 at the tip of a band-shaped extended portion 13b extending forward in parallel with the rotary shaft 4 from the base end 13a.
A cover portion 13c having a substantially U-shaped cross section is provided to cover the circumference, and the cover portion 13c has a substantially U-shaped cross section.
A guide roller 16 is provided at the tip of the rotary blade 6 to guide the cutting position of the tubular body 15 by the rotary blade 6.
It is enabled to come into contact with the material to be cut 15 and is rotatably supported by a shaft pin 17 on the radial extension line of the rotary blade 6 in parallel with the rotary blade 6.

In addition, a transparent cover 18 is fixed to one side of the extension portion 13b and cover portion 13c of the protective cover 13, i.e., to the operator's side when cutting the tube body 15, via mounting legs 19, 19 to prevent chips from scattering, allowing the operator (worker) to see the cutting position.

Further, a guide groove 11a is recessed in the circumferential direction on the surface of the fixing ring 11, into which a slider 20 protruding from the circumferential surface of the cylindrical portion 10 is slidably engaged. The fixing ring 11 and the protective cover 13 are attached to the rotary blade 6 within the effective length of the blade 11a.
It is provided so that it can be moved and adjusted in the circumferential direction, and a concave groove (not shown) is continuously provided in the axial direction from one end of the guide slot 11a to the rear end of the fixing ring 11. 11 is designed to be detachable from the cylindrical portion 10.

Further, by screwing a fixing screw 12 through the fixing ring 11 and crimping the tip of the screw 12 to the cylindrical portion 10, the fixing ring 11 is fixed within the range of the long guide groove 11a. One end is hooked to the fixing ring 11, and the other end is hooked to one side of the proximal end 13a of the protective cover 13, with a spring 21 interposed therebetween, so that the protective cover 13 can be guided. The roller 16 is configured to be biased in the direction of contacting the surface of the tubular body 15.

In addition, in Fig. 1, 22 indicates the motor energization ON/
Shows the OFF switch.

In the above configuration, when using this to dismantle the existing lead pipe that covers and protects the connection part c of communication cables b and b', switch 22
is turned on to start the motor, drive and rotate the rotary blade 6, and with the transparent cover 18 positioned on the worker's side, direct the rotary blade 6 and guide roller 16 in the length direction of the main lead pipe f, and guide it. By bringing the roller 16 into contact with the cut position and moving the bevel in the axial direction so that the guide roller 16 guides the cut position, the rotary blade 6 cuts the main lead pipe f as shown by the broken line in FIG. Cuts h are made in the axial direction of the auxiliary lead pipes e and e at both ends, and then cuts i and i are made in the circumferential direction near both ends of the main lead pipe f. In this case as well, the guide roller 16 is brought into contact with the circumferential surface of the main lead pipe f to guide the cutting position.

Now, the main lead pipe f is separated from the auxiliary lead pipes e and e, so move the main lead pipe f along the cut h using a tool such as pliers or a machete as shown in the arrow j.
By cutting in the ←→j direction, the main lead pipe f can be removed as shown in Figure 6.

Next, the remaining portions f′ at both ends of the main pipe f,
After removing f' with pliers, etc., make cuts K and I in the axial direction and circumferential direction of the auxiliary lead pipes e, e in the same manner as described above, and use a machete, pliers, etc. to make cuts K and I in the axial direction and circumferential direction of the auxiliary lead pipes e, e.
By removing this, the lead pipe covering protection can be completely dismantled and removed as shown in FIG.

Fig. 8 shows a box 23 made of synthetic resin that covers and protects the cable connection part c, and the longitudinal end walls 24, 24 of the box 23 have a box 23 that fits the thickness of the cables b, b'. U groove 25,
25 are installed opposite each other, and the rubber coatings a and a of the cables b and b' from which the lead pipe coating protection has been removed as described above are fitted into the grooves 25 and 25, and the connection part c is installed inside, It is formed so that the opening/closing lid 26 is closed to cover and protect the connection part c.

Further, when the rotary blade 6 makes a cut into the workpiece 15 such as a lead pipe, the circumferential surface of the cutting depth adjustment ring 7 installed in parallel with the rotary blade 6 comes into contact with the surface of the workpiece 15. Since the depth of cut is determined,
The ring 7 may be replaced with one of any diameter depending on the desired cutting depth.

[Effects of the invention] Since the pipe bevelling machine according to the invention is constructed as explained above, it is possible to cover and protect the connection part c of a communication cable installed in a manhole buried underground, for example. When dismantling the existing lead pipes f, e, e and replacing them with synthetic resin boxes 23, the guide roller 16 pivotally supported on the tip of the protective cover 13
is brought into contact with the surface of the lead pipe, and while the guide roller 16 guides the cut position, the rotary blade 6 allows the cuts h, i... to be easily placed at the desired position, and the cut depth adjustment ring 7 Since the cut h... can be made to the desired depth, damage to the cables b and b' can be avoided by replacing the adjustment ring 7 with a diameter that corresponds to the wall thickness of the lead pipes f, e, and e. It is possible to make a cut h... without having to do anything, and by cutting open the cut portion with a machete, pliers, etc., the disassembly and removal of the lead pipes f, e, and e can be done easily and efficiently. At the same time, when the communication cables b and b' are arranged along the inner wall surface of the manhole, the protective cover 13 is rotated together with the fixing ring 11 toward the worker, and the transparent cover 18 is positioned on the worker's side. This prevents the chips from scattering toward the operator when making the cut h..., and prevents the chips from hitting the worker's face or getting into the eyes. Therefore, since the guide roller 16 is urged toward the lead pipes f, e, and e integrally with the protective cover 13, the protective cover 13 will not move even if there are irregularities on the surfaces of the lead pipes f, e, and e. The guide roller 16 adapts well to uneven surfaces, making it possible to guide the incision position more reliably.Furthermore, the incision position can be confirmed through the transparent cover 18, resulting in excellent safety and workability. effective.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the pipe beveling machine according to the present invention, Fig. 2 is a cross-sectional view taken along the - line in Fig. 1, and Figs. 3 and 4 are different views of the same embodiment. 5, 6, and 7 are front views showing the state of use, respectively, and FIG. The figure is a perspective view showing a state in which a communication cable removed from a lead pipe is housed in a synthetic resin box, and FIG. 9 is a longitudinal sectional side view showing a cable connection section using an existing lead pipe. 1...Main body, 3...Chuck, 4...Rotating shaft,
6...Rotary blade, 7...Cutting depth adjustment ring,
10...Cylindrical part, 11...Fixing ring, 13...
Protective cover, 15... tube body, 16... guide roller, 18... transparent cover, 21... spring.

Claims (1)

[Scope of utility model registration request] A rotary blade 6 with a cut depth adjustment ring 7 removably attached to the end of the rotary shaft 4 is detachably attached to the end of the rotary shaft 4 via the drive shaft of the main body 1 containing a motor and the chuck 3. Part 10
A fixing ring 11 is attached to the fixing ring so as to be detachable and movable in the circumferential direction, and a protective cover 13 for the rotary blade is pivotally connected to the fixing ring and extends forward, and a protective cover 13 is attached to the distal end and the proximal end of the protective cover. , a rotatable guide roller 16 and a transparent cover 18 that come into contact with the workpiece are provided, and the protective cover is biased by a spring 21 in a direction in which the guide roller comes into contact with the tubular body 15. Bevel machine for pipe bodies.