JPH0623383Y2 - Cable cutter safety cutter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention cuts only the flesh of the cable housing tube in which the signal cable is housed, and prevents the housing cable from being cut and scratched. A safety cutter for a cable storage pipe.

[Conventional technology]

Generally, a telephone signal cable or the like is housed in a cable housing pipe, is provided with underground wiring, and is laid by relaying through a manhole or a handhole. When widening work such as manholes in such a wiring pipeline, it is necessary to cut and widen the existing pipeline by the widening amount, and it is necessary to cut only the pipe meat of the storage pipe without damaging the storage cable. .

The conventional cutting operation of the cable housing pipe is a cutting work using an electric cutter, a pipe cutter, a grinder, a metal cutting saw, etc. so as not to damage the cable at a predetermined position that matches the dimensions of the modified manhole. . This type of work is a vertical cutting work along the pipe axis direction of the cable housing pipe, and a following circular cutting work along the circumferential direction, and different types of dedicated cutters are used respectively. For small-diameter pipes (50 mmφ, 25 mmφ) that cannot be used with this cutter, use a grinder etc. in advance to insert a shoehorn-shaped cable protection seat between the inner wall of the housing pipe and the cable so that the cutting edge of the tool does not damage the cable skin. I was doing cutting work while protecting it.

[Problems to be solved by the invention]

However, when using the electric cutter of the conventional method, it is complicated to use both a vertical cutting machine and a ring cutting machine, and when using a grinder etc., there is a gap for inserting the cable protection seat. Without it, there was a problem that it could not be cut without damaging the accommodation cable. Especially when multiple cables are inserted in close contact, there is no gap for insertion of the cable protection seat, and the seat cannot be inserted by the so-called interruption work in which a manhole is newly installed in the middle of the line. There was a problem that the cutting work had to be carried out. Therefore, it has been extremely difficult to safely cut only the pipe flesh of the cable storage pipe without damaging the existing cable by substantially vertically dividing and slicing the existing pipe.

The present invention focuses on the above-mentioned conventional problems, and provides an adjustment guide plate that can be applied to both vertical division and circular cutting of the storage tube while adjusting so that the cutting edge amount of the cutter does not exceed the tube meat of the cable storage tube. The purpose is to provide the safety cutter provided.

[Means for solving problems]

In order to achieve the above object, a safety cutter for a cable housing pipe according to the present invention is provided with a blade amount adjusting guide plate having a blade opening window portion of the rotating cutting blade on a cutter body having a rotating cutting blade, and one end of this Is hinged to the cutter body and the other end is opened and closed by an adjusting shaft to adjust the protruding amount of the rotary cutting blade, and an arc for joining to the wall of the cable housing pipe is formed on the lower surface of the blade amount adjusting plate. A guide having a surface, characterized in that a vertical split guide provided in a direction along the plane of rotation of the rotary cutting blade and a cross-section guide provided in a lateral direction of the cutter orthogonal to the guide are arranged in a cross shape. .

[Action]

According to the above configuration, the blade amount adjustment guide plate is adjusted to match the blade amount of the rotary cutting blade with the wall thickness of the accommodation pipe to be cut, and the arc in the direction along the rotation plane of the rotary cutting blade is initially set. The guide is brought into contact with the cable accommodating pipe, and the arc guide guides traveling along the pipe axial direction to perform vertical cutting. Then, the circular guide in a direction perpendicular to the plane of rotation of the rotary cutting blade may be brought into contact with the cable housing pipe, and the circular guide may be cut while performing traveling guide along the pipe circumferential direction. Since the circular arc guide fits the pipe diameter in any cutting direction, there is no diagonal cutting or meandering cutting, and since the blade amount is adjusted to the pipe meat, insufficient cutting or overcutting does not occur, especially for cable Safe and reliable pipe cutting can be performed without using a protective seat.

〔Example〕

Hereinafter, an embodiment of a safety cutter for a cable storage pipe according to the present invention will be described in detail with reference to the drawings.

1 and 2 are a perspective view and an exploded perspective view of a cable cutter safety cutter according to an embodiment. As shown in the figure, this cable storage pipe safety cutter uses a so-called grinder, and a cutter body 10 with a built-in rotary power unit has a thin disk-shaped rotary cutting blade 12 attached to the outer side of its tip. There is. The rotary cutting blade 12 cuts along the rotating surface by pressing the blade portion of the outer peripheral edge thereof against the material to be cut. Also,
In order to prevent the danger that the rotary cutting blade 12 is exposed to the outside, the cutter body 10 is provided with a wheel guide 14 that covers the outer peripheral edge of the upper half of the rotary cutting blade 12. Therefore, the lower half of the rotary cutting blade 12 is the cutting side.

The cutter body 10 provided with the rotary cutting blade 12 is provided with a blade amount adjusting guide plate 16 for adjusting the cutting amount of the rotary cutting blade 12 on the cutting side to set the cutting depth. As shown concretely in FIGS. 3 to 5, the blade amount adjusting guide plate 16 has a long flat cross shape and has a blade window portion 18 of the rotary cutting blade 12 at the center. A cross-shaped opening that rotates along the long side opening of the blade exit window 18
A blade 12 is mounted so that a predetermined amount of the blade tip is projected from the lower surface of the blade protrusion adjustment guide plate 16. In order to provide the blade amount adjusting guide plate 16 with the blade amount adjusting function, one end of the long plate 16A is hinge-coupled to the cutter body 10 and the other end thereof can be brought into contact with and separated from the cutter body 10. It is connected. That is, as shown in FIG. 2, a long plate
The floating holder 20 having a pair of brackets 20A provided on the top surface of the tip of 16A is attached, while the hinge bracket 22 is provided at the tip of the wheel guide 14 described above, and the bracket 20A and the hinge bracket 22 are pivotally attached to each other. It is connected by 24 and is hinged. This allows the blade amount adjustment guide plate 16 to rotate around the pivot pin 24,
You can open and close the opposite end.

In addition, a mechanism for adjusting the contact / separation amount with the wheel guide 14 and setting the blade protrusion amount is provided at the open / close end of the long plate 16A. An adjustment shaft 26, whose front end is connected to the long plate 16A, is screwed to the rear end of the wheel guide 14, and the adjustment shaft 26 is rotated to move the screw back and forth.
By adjusting the amount of contact and separation between the long plate 16A and the wheel guide 14, the amount of the rotary cutting blade 12 protruding from the lower surface of the blade window 18 can be adjusted. In order to screw the adjusting shaft 26 onto the wheel guide 14, the wheel guide 14 has a split female screw.
28 are provided. The split female screw 28 is composed of a screw half body 28A which is integrated with the wheel guide 14 and a cap screw 28B which is screwed and fixed to the screw half body 28A. I am letting you. The tip of the adjusting shaft 26 is connected to the blade amount adjusting guide plate 16, which depends on a spherical joint because the blade amount adjusting guide plate 16 swings. That is, a spherical body 30 is provided at the tip of the adjusting shaft 26, and the spherical body 30 is wrapped around the rear end of the elongated plate 16A. For encapsulation, a shaft holder 32 is attached to the upper surface of the rear end of the long plate 16A, and a hemispherical hole 34 is formed in each of the mating surfaces of the shaft holder 32 and the long plate 16A. Holds the spherical body 30 in between. Of course, the shaft holder 32 is provided with a groove through which the adjusting shaft 26 can penetrate so that the shaft holder 32 can be attached and detached. Therefore, by rotating the adjusting shaft 26, the adjusting shaft 26 is screwed back and forth by the split female screw 28 of the wheel guide 14 and moves up and down the spherical body 30 portion, so that the blade amount adjustment guide plate 16 swings around the hinge, The amount of blade of the rotary cutting blade 12 is adjusted.

Blade amount adjustment guide plate attached as described above
The 16 is further formed with an arc guide adapted to the pipe diameter of the cable housing pipe to be cut. As previously mentioned,
The blade amount adjusting guide plate 16 is formed in a cross shape, and the blade window portion 18 is provided in the center, and the rotary cutting blade 12 is exposed to the opening of the long side thereof. Therefore, the long plate 16A has a rotation surface of the rotary cutting blade 12. The direction is along. When the tube shaft of the cable housing pipe is arranged so that the tube axis of the cable housing pipe is located along the rotation surface of the rotary cutting blade 12, the lower surface of both ends of the long plate 16A sandwiching the blade exit window portion 18 is The first circular arc guides 34 each having a diameter dimension that fits closely to the outer diameter are formed. Further, the short plate 16B is in a direction perpendicular to the direction along the rotation surface of the rotary cutting blade 12, but the first arc guide 34 is provided on the lower surface of both ends of the short plate 16B which sandwiches the blade exit window portion 18. The second circular arc guides 36 having the same circular arc surface are formed in the orthogonal state. Therefore, when the rotary cutting blade 12 is made orthogonal to the tube axis of the cable housing pipe, the second arc guide 36 fits the outer peripheral surface of the cable housing pipe, and the blade tip can be guided and moved along the circumferential direction. It is like this.

In the figure, 38 is a handle for supporting the cutter body 10. Further, what is shown in FIG. 7 is a gauge 40 for setting the amount of cutting out, which has an arcuate surface 42 following the arc guides 34, 36, and this arcuate surface 42 corresponds to the amount of cutting out to be set. A groove 44 having a depth to be formed is formed. When adjusting the blade length, align the gauge 40 with the arc guides 34, 36, insert the cutting edge of the rotary cutting blade 12 into the groove 44, and turn the adjusting shaft 26 to match the depth of the groove 44. The amount of output is adjusted.

The operation of the cable cutter safety cutter constructed as described above is as follows.

First, the gauge 40 adjusts the amount of protrusion of the rotary cutting blade 12 from the blade amount adjustment guide plate 16. This may be adjusted to the depth of the groove 44 as described above. Since the groove depth matches the wall thickness of the cable accommodating tube, the amount of cutting out is not too large or too small. After adjusting the amount of cutting, first, the cable housing pipe is vertically cut. This is performed by bringing the first arc guide 34 into close contact with the cable housing pipe and moving the cutter body 10 along the pipe axis direction of the cable housing pipe. You can do it. The rotary cutting blade 12 cuts by a cutting depth corresponding to the protruding amount, and this does not reach the accommodated cable. In this case, for the sake of safety, a spacer may be inserted between the cable and the cable accommodating tube to make a large gap between them. After the vertical cutting, the cutter body 10 is rotated 90 degrees so that the rotary cutting blade 12 is orthogonal to the axial direction of the cable housing pipe, and the second arc guide 36 is brought into close contact with the outer peripheral surface of the cable housing pipe. The second arc guide 36 is the rotary cutting edge 12
Is guided in the circumferential direction of the cable accommodating pipe, so that the pipe slice is cut into slices according to the amount of cutting.

The blade amount adjustment guide plate 16 as described above may be variously prepared according to the tube diameter of the cable housing tube to be cut, and the normal tube diameters are 75 mmφ, 50 mmφ, and 25 mmφ, so this size is suitable. It is sufficient to prepare the blade amount adjusting guide plate 16 having the arc guide.

As described above, according to this embodiment, when cutting and removing the cable housing pipe, it is possible to perform both the vertical cutting work and the circular cutting work with one type of cutter, and moreover, the blade amount adjustment guide plate
16 sets the blade amount correctly, and the cutting direction is also accurately guided by the circular arc guides 34, 36 on the lower surface of the plate in the axial direction and the circumferential direction of the cable housing pipe, so there is no erroneous cutting and diagonal cutting or The meandering cut is prevented. Therefore, it is possible to easily and accurately cut and remove only the pipe wall of the cable storage tube without damaging the stored cable. If the size of the target cable storage tube is different, the blade amount adjustment guide plate 16 may be replaced with a corresponding size. Further, in this embodiment, there is an advantage that the cutting condition of the rotary cutting blade 12 can be visually confirmed from the short side opening of the blade exit window portion 18, and the wear state of the rotary cutting blade 12 and the condition of the cut portion can be visually recognized.

In the above embodiment, the blade amount adjustment guide plate 16 has a cross shape, but this may be at least provided with the blade window portion 18 and the arc guides 34 and 36 orthogonal to each other, and the external shape is not limited. Absent.

[Effect of device]

As described above, according to the present invention, the cutter body having the rotary cutting blade is provided with the plate having the blade exit window portion which is arranged so as to face one edge portion of the rotary cutting blade and has a cross-shaped opening. , The one end of the plate is pivotally attached to the cutter body, and the other end is rotated around the pivot by an adjusting shaft to make it possible to adjust the amount of blade coming out of the blade exit window portion, and the cross-shaped blade exit window portion of the plate. Is provided with a vertical split guide provided at the front and rear of the rotary cutting blade and a circular cutting guide provided at the left and right sides of the cutting blade, and these guides are arc guides adapted to the pipe diameter of the cable housing pipe. Therefore, it is possible to easily cut and remove only the cable housing pipe without damaging the inner housing cable, and even a person who is not skilled in pipe cutting can achieve a work efficiency improvement three times that of the conventional one. , At the same time Also it can be reduced down. In particular, in the present invention, it is possible to easily switch from the vertical splitting work to the ring-cutting work by simply changing the direction without any adjustment work.In addition, the cutting depth can be adjusted before and after the rotary cutting blade. Since the wheel cutting guides are arranged in a cross shape on the left and right, the ends of the hinged plates can be easily operated by operating the adjustment shaft, and the cutting depths for both vertical and wheel cutting can be made the same. , Very easy to work with. Furthermore, since the vertical split guide and the ring cutting guide are guided in the same plane portion as the cutting portion by the rotary cutting blade, the effect of facilitating the setting of the cutting depth by the cutting blade can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a cable cutter safety cutter according to an embodiment, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a perspective view of a blade amount adjustment guide plate, and FIG. The drawing is the same side view, FIG. 5 is the same plan view, FIG. 6 is a side view of the main part of the cutter, and FIG. 7 is a perspective view of the gauge. 10 …… Cutter body 10, 12 …… Rotating cutting blade, 16 …… Blade amount adjustment guide plate, 18 …… Blade window part, 26 …… Adjustment shaft, 34
…… First arc guide, 36 …… Second arc guide.

Claims (1)

[Scope of utility model registration request] 1. A cutter body provided with a rotary cutting blade is provided with a blade amount adjusting guide plate having a blade opening window portion of the rotary cutting blade, one end of which is hinged to the cutter body and the other end of which is provided by an adjusting shaft. It is a guide having an arc surface that is joined to the pipe wall of the cable housing pipe on the lower surface of the blade amount adjusting plate, which is opened and closed to make it possible to adjust the protruding amount of the rotary cutting blade. A safety cutter for a cable storage pipe, characterized in that a vertical split guide provided in a direction along with a cutter that is orthogonal to the vertical split guide is arranged in a cross shape in a cross shape.