JPH0720213U - Flexible pipe cutting tool - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if there is a considerable difference in the size of flexible pipes, one cutting tool can smoothly and cleanly cut flexible pipes of various sizes, which is economical and cutting work. To provide a flexible pipe cutting tool capable of significantly improving efficiency. [Structure] This flexible pipe cutting tool has a tool body 1
A pair of upper and lower guide rollers 2 rotatably supported by
A disk blade 3 rotatably supported in opposition to the guide roller 2, an elastic holding roller 4 rotatably supported coaxially with the disk blade 3 on both sides of the disk blade 3, and the disk blade. In a flexible pipe cutting tool comprising an advancing / retreating operation member 5 for moving the elastic holding roller 4 toward and away from the guide roller 2, the outer diameter of the elastic holding roller 4 and the outer diameter of the disc blade 3 are made substantially the same. In addition to being configured, the elastic holding roller 4 is characterized by being made of a flexible and elastic material such as urethane rubber.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a flexible pipe made of a corrugated metal pipe corrugated so that peaks and valleys are continuous in the longitudinal direction, and a coated flexible pipe formed by coating the corrugated metal pipe with a covering material such as vinyl chloride. The improvement of flexible pipe cutting tools used to cut steel.

[0002]

[Prior art]

 Heretofore, various types of structures have been proposed as this type of flexible pipe cutting tool, and as disclosed in, for example, Japanese Utility Model Publication No. 10977/1992, a pair of upper and lower rotatably supported by a tool body is supported. A guide roller, a disk blade rotatably supported to face the guide roller, an elastic holding roller rotatably supported on both sides of the disk blade coaxially with the disk blade, and the disk blade The elastic holding roller is made up of an advancing / retreating member for moving the elastic holding roller toward and away from the guide roller. The elastic holding roller is made up of a relatively hard elastic member, and the disc blade is projected from the outer peripheral portion of the elastic holding roller. A flexible pipe cutting tool is known in which the protruding length of the flexible pipe is held at about half the difference between the outer diameter and the inner diameter of the flexible pipe.

[0003]

[Problems to be solved by the device]

 To cut a flexible pipe with the cutting tool configured as described above, sandwich the flexible pipe between the guide roller and the disc blade so that the disc blade bites into the outer circumference of the flexible pipe, and the cutting tool is wrapped around the flexible pipe. The cutting is performed by rotating and moving along the line, but at that time, the protruding length of the disc blade is kept constant, so depending on the size of the flexible pipe, the peaks and troughs of the flexible pipe may be cut. Since the difference in the outer diameter between the flexible tube and the flexible roller holds the flexible tube more strongly than necessary, or the flexible tube finishes cutting the flexible tube without holding it at all, the flexible tube is twisted. It is easy, and it is difficult to avoid wrinkles on the coating of the flexible pipe, swelling, dents, and defects on the cut surface, making it difficult to cut the flexible pipe smoothly and cleanly. There was.

Further, in order to solve the above problems, it is sufficient to prepare various kinds of cutting tools according to the size of the flexible pipe, but this is extremely uneconomical, and cutting Frequent replacement of the cutting tool during work is very complicated, and there is a problem that the cutting work efficiency of the flexible tube is significantly reduced.

The present invention has been researched and developed with the object of solving the above problems. Even if there is a considerable difference in the size of the flexible tube, a single cutting tool can be used to make flexible tubes of various sizes. It is an object of the present invention to provide a flexible pipe cutting tool which can smoothly and neatly cut, and is therefore economical, and which can remarkably improve the cutting work efficiency.

[0006]

[Means for Solving the Problems]

 As means for solving the above problems and achieving the object, in the present invention, a pair of upper and lower guide rollers rotatably supported by a tool main body and rotatably supported by facing the guide rollers. A disk blade, an elastic holding roller rotatably supported on both sides of the disk blade coaxially with the disk blade, and an advancing / retreating member for moving the disk blade and the elastic holding roller toward and away from the guide roller. In the flexible pipe cutting tool, the outer diameter of the elastic holding roller and the outer diameter of the disk blade are set to be substantially the same, and the elastic holding roller is made of a flexible and elastic material such as urethane rubber. We have developed a flexible pipe cutting tool that is characterized by the above.

Further, in the present invention, in the flexible pipe cutting tool configured as described above, the flexible pipe cutting tool in which the outer diameter of the elastic holding roller and the outer diameter of the disk blade are the same, and the outer diameter of the elastic holding roller We have developed flexible tube cutting tools that have a diameter slightly larger than the outer diameter of the disc blade.

[0008]

Since the flexible pipe cutting tool according to the present invention is configured as described above, the flexible pipe to be cut is interposed between the guide roller, the disc blade, and the elastic holding roller, and the advancing / retreating operation member is provided. When the disc blade and the elastic holding roller are operated closer to the guide roller to hold the flexible pipe, the disc blade is placed facing the valley portion of the flexible pipe. It is held by the guide roller and the elastic holding roller in advance regardless of the above.

Next, when the disc blade and the elastic holding roller are further advanced, the elastic tube is made of a flexible and elastic material, so that the flexible tube is soft and secure by the guide roller and the elastic roller. Since the disc blade is inserted into the flexible tube while being held by the flexible tube, rotating the tool in this state ensures that the flexible tube is securely held until the completion of cutting, even if the size is different, It is cut cleanly.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 to 4 in the accompanying drawings. A flexible pipe cutting tool shown in this embodiment is a tool body 1, a guide roller 2, a disc blade 3 An elastic holding roller 4 and an advancing / retreating operation member 5 for moving the disc blade 3 and the elastic holding roller 4 closer to and away from the guide roller 2.

The tool body 1 is provided with a straight tubular frame 6 and a flexible pipe P which is formed by opening the upper and left and right sides of the straight tubular frame 6 in a curved manner. And a curved frame 7 formed of a concave portion.

In addition, the guide roller 2 includes a pair of upper and lower hard synthetic resin rollers 2a via two support shafts 8 which are horizontally suspended above and below the front inside portion of the curved frame 7 of the tool body 1. The rollers 2a and 2a are rotatably approached in parallel, and each of the rollers 2a and 2a is divided into three parts for ease of production and smoothness of the rotation guide.

Further, the disc blade 3 is configured to be rotatably supported by an intermediate portion of a single support shaft 9 which is horizontally mounted on a tip protruding portion of an advancing / retreating operating rod of an advancing / retreating operating member 5 described later. Further, the elastic holding roller 4 includes two rollers 4a and 4a made of a flexible and highly elastic material such as urethane rubber so as to be rotatable about the spindle 9 on both sides of the disc blade 3. In this embodiment, the outer diameter of the elastic holding roller 4 and the outer diameter of the disc blade 3 are the same.

Further, the advancing / retreating operation member 5 includes a screw rod 10 which is inserted into the straight tubular frame 6 from the rear side, and a rotary operation grip 13 which is fitted to the base end portion thereof with a screw 11 and a cap nut 12. It is composed of a cap nut-shaped advancing / retracting operating rod 14 in which the screw rod 10 is screwed in the straight tubular frame 6, and the screw rod 10 is rotated left and right by rotating the rotary operation grip 13 left and right. The advancing / retreating operating rod 14 is moved back and forth, and the disc blade 3 and the elastic holding roller 4 are moved toward and away from the guide roller 2 via the support shaft 9 which is horizontally mounted on the protruding end of the advancing / retreating operating rod 14. In FIG. 4, reference numeral 3'denotes a disc blade for replacement, which is detachably attached by a screw 11 in a recess 15 formed on the rear side surface of the rotary operation grip 13.

Next, a usage state of the embodiment configured as described above will be described together with actions and effects based on FIGS. 5 to 8. The flexible pipe P is arranged in the concave portion of the curved frame 7 of the tool main body 1, the trough portion P _{2 of the} pipe P and the position of the disc blade 3 are aligned, and the rotary operation grip 13 is rotated clockwise to advance and retract the operating rod. When 14 is appropriately advanced, as shown in FIG. 5 (FIG. 6), the flexible tube P is clasped by the guide roller 2 (2a, 2a) and the elastic holding roller 4 (4a, 4a) to make it flexible. The elastic holding roller 4 having a high elasticity is pushed by the ridge P ₁ of the pipe P, and the pipe P is softly and elastically held reliably. At this time, the disc blade 3 is in the valley portion of the pipe P. It is only inserted into P ₂ and has not been inserted into the pipe P yet.

In the state where the flexible pipe P is securely held by the elastic holding roller 4 as described above, when the rotating operation grip 13 is further rotated in the clockwise direction to move the advancing / retreating operation rod 14 forward, FIG. 7 (FIG. 8) As shown in FIG. 3, the elastic holding roller 4 is pushed deeper by the ridge P ₁ of the pipe P, so that the pipe P is more strongly and securely held by the elastic holding roller 4, and at the same time, the pipe P is held in this state. Is inserted into the disc blade 3 at its trough.

Next, the cutting tool is rotated around the flexible pipe P to cut the pipe P 3 by the disc blade 3, and the pipe P is cut by the guide roller 2 and the elastic holding roller 4 as described above. Since it is held firmly and softly and elastically, the pipe P will not be twisted during cutting and wrinkles will not be generated on the coating, and the cut end surface will not be bent or dented. It is possible to smoothly cut the pipe P having a clean cutting finish without causing a defect.

Further, even if the size of the flexible pipe P changes, the elastic holding roller 4 may hold the pipe P stronger than necessary, or may cut the pipe P without holding it at all. Since there is no cutting tool, it is possible to cut flexible pipes P of various sizes smoothly and neatly with one cutting tool, which is economical and can significantly improve the cutting work efficiency.

FIGS. 9 and 10 show another embodiment of the present invention. The difference from the above embodiment is that the outer diameter of the elastic holding roller 4 is slightly larger than the outer diameter of the disc blade 3. The diameter is the same as that of the other components. Therefore, the same reference numerals as those in the above embodiment are attached to the respective portions in the above figures. According to this embodiment, the holding force of the elastic holding roller 4 with respect to the flexible pipe P can be increased, the kinking prevention effect of the pipe P during cutting can be improved, and swelling, dents, and defects occur on the cut end face. Although there is an advantage that it is possible to improve the effect of preventing the pipe P and smoothly cut the pipe P having a more beautiful cutting finish, on the other hand, on the other hand, there is a possibility that wrinkles may be generated in the coating material of the pipe. It is a disadvantage.

The main embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and the scope of the invention can be achieved without departing from the scope of the invention. It goes without saying that various design changes are possible.

[0021]

[Effect of device]

 According to the present invention, a pair of upper and lower guide rollers rotatably supported by a tool body, a disk blade rotatably supported by facing the guide roller, and a disk blade on both sides of the disk blade. A flexible tube cutting tool comprising an elastic holding roller rotatably supported coaxially and a disc blade and an advancing / retreating member for moving the elastic holding roller toward and away from the guide roller. Since the outer diameters of the disk blade and the disk blade are configured to have substantially the same length, and the elastic holding roller is configured of a flexible and elastic material such as urethane rubber, it relates to a flexible pipe cutting tool. The following excellent effects are obtained as compared with the conventional example described above.

(1) Before the cutting operation of the flexible pipe by the disc blade is started, the flexible pipe is configured to be held securely by the elastic holding roller which is flexible and has high elasticity. The flexible pipe can be smoothly and surely cut without causing the flexible pipe to be twisted and the cut end surface to be curled, dented or chipped.

(2) Since the elastic holding roller is made of a flexible elastic material such as urethane rubber, wrinkles are not likely to occur on the surface of the coating of the flexible pipe during rotary cutting, and the cutting finish is further improved. Can keep good.

(3) Flexible pipes of various sizes can be smoothly and neatly cut by one cutting tool, which is economical and can significantly improve the cutting work efficiency.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a partial cutaway plan view.

FIG. 4 is a vertical sectional side view.

FIG. 5 is a plan view showing a state in which a flexible tube is held by being held.

FIG. 6 is an enlarged plan view of part of FIG.

FIG. 7 is a plan view of the flexible tube in a cut state.

FIG. 8 is an enlarged plan view of part of FIG.

FIG. 9 is a plan view showing another embodiment of the present invention.

FIG. 10 is a side view thereof.

[Explanation of symbols]

1 Tool Main Body 2 (2a) Guide Roller 3 (3 ') Disc Blade 4 (4a) Elastic Holding Roller 5 Advance / Retract Actuator 6 Straight Tubular Frame 7 Curved Frame 8 Spindle 9 Spindle 10 Screw Rod 11 Screw 12 Cap Nut 13 Rotation Operation Grip 14 Advancing / retreating rod 15 Dimple P Flexible tube P ₁ mountain P ₂ valley

Claims (3)

[Scope of utility model registration request] 1. A pair of upper and lower guide rollers that are rotatably supported by a tool body, a disk blade that is rotatably supported by facing the guide rollers, and a disk blade on both sides of the disk blade. A flexible pipe cutting tool comprising an elastic holding roller rotatably supported coaxially and rotatably, and an advancing / retreating operation member for moving the disk blade and the elastic holding roller toward and away from the guide roller. A flexible pipe cutting tool characterized in that the outer diameters of the disk blade and the outer diameter are substantially the same, and the elastic holding roller is made of a flexible and elastic material such as urethane rubber. 2. The flexible pipe cutting tool according to claim 1, wherein the elastic holding roller and the disk blade have the same outer diameter. 3. The flexible pipe cutting tool according to claim 1, wherein the elastic holding roller has an outer diameter slightly larger than the outer diameter of the disc blade.