JPH0737521U - Coated flexible pipe cutting tool - Google Patents

Abstract

(57) [Abstract] [Purpose] A guide roller and a holding roller for cutting a bare flexible tube of a length necessary to attach a plug-in screw tightening type joint to the cut end of the coated flexible tube. (EN) Provided is a coated flexible pipe cutting tool capable of surely preventing wrinkles from being generated in the coating material of a coated flexible pipe sandwiched by and. A coated flexible pipe cutting tool according to the present invention comprises a pair of upper and lower guide rollers 2.2 which are rotatably supported by a tool body 1, and rotatably supported by being opposed to the guide rollers 2.2. Disc blade 3 and a holding roller 4 rotatably supported on both sides of the disc blade 3 coaxially with the disc blade 3, and the disc blade 3 and the holding roller 4 with respect to the guide roller 2.2. In the coated flexible pipe cutting tool including the advancing / retreating actuating member 5 that moves toward and away from each other, each of the guide rollers 2.2 is provided with a main guide roller 2 located in the middle.
a and auxiliary guide rollers 2b, 2b located on both sides thereof
In addition to the above configuration, at least one of the auxiliary guide rollers 2b has a smaller outer diameter than the main guide roller 2a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a coated flexible pipe cutting used to cut a coated flexible pipe formed by coating a corrugated metal pipe corrugated so that peaks and valleys are continuous in the longitudinal direction with a coating material such as vinyl chloride. More particularly, it relates to a coated flexible pipe cutting tool used for cutting, leaving a bare flexible pipe of a length necessary for installing a plug-in type fitting at its cutting end. .

[0002]

[Prior art]

 Conventionally, various types of structures have been proposed as this type of coated flexible pipe cutting tool, and as disclosed in, for example, Japanese Utility Model Publication No. 10977/1992, the tool is rotatably supported by the tool body. A pair of upper and lower guide rollers, a disc blade rotatably supported facing the guide rollers, and an elastic holding roller rotatably supported on both sides of the disc blade coaxially with the disc blade, It is composed of the disk blade and an advancing / retreating operation member that moves the elastic holding roller toward and away from the guide roller. The elastic holding roller is composed of a relatively hard elastic member, and the disk blade of the elastic holding roller is formed. There is known a flexible pipe cutting tool which is configured to project from the outer peripheral portion and hold the projected length at a length of about 1/2 of the dimensional difference between the outer diameter and the inner diameter of the flexible tube.

[0003]

[Problems to be solved by the device]

 Thus, in order to cut the coated flexible pipe with the cutting tool configured as described above, the coated flexible pipe is sandwiched between the guide roller and the disc blade, and the disc blade is cut into the outer periphery of the coated flexible pipe. , The cutting tool is rotated around the coated flexible pipe to cut it, but it is necessary to install a fitting of the insertion screw tightening type at the cutting end. In the case of cutting while leaving a bare flexible tube which is short, first, as shown in FIG. 8 (a), first, a cutting for setting the end portion to the long covered flexible tube P is performed. Then, as shown in FIG. 8 (b), the coating material C is peeled off from the cut end P1 by about 5 cm, and then about 5 cm away from the peeled end C1. To expose the bare flexible tube P2.

Then, as shown by an arrow in FIG. 8B, a bare flexible pipe P2 is separated from the peeled end C1 of the coating material C by 2 to 4 peaks to finish cutting. After performing the above, the fitting of a plug-in screw tightening type (not shown) is attached to the covered flexible pipe P at the end, and the bare flexible pipe P2 is caulked by screwing to complete the fitting work. Is.

In the above working process, when the bare flexible pipe P2 is finish-cut by the above-mentioned conventional cutting tool, since the guide roller of the cutting tool has the same diameter over the entire length, the flexible pipe is twisted obliquely. Force is applied to the covering material of the coated flexible pipe sandwiched between both sides of the guide roller and the elastic holding roller, and the holding force between both sides of this guide roller and the elastic holding roller is too strong. There is a problem that it is difficult to avoid wrinkles on the covering material when cutting by rotation.

When the above wrinkles occur, it becomes difficult to attach the insertion screw tightening type joint, and when the wrinkles occur greatly, it becomes impossible to attach this joint, and the complicated cutting work described above is performed. The problem is that you have to start over.

The present invention was developed with the object of solving the above-mentioned problems, and a bare length of a length necessary for attaching a fitting of a plug-in screw tightening type to a cut end of a coated flexible tube is provided. An object of the present invention is to provide a coated flexible pipe cutting tool capable of reliably preventing wrinkles from being generated in a coating material of a coated flexible pipe sandwiched between a guide roller and a holding roller when cutting while leaving the flexible pipe of And

[0008]

[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. From the disc blade, a holding roller rotatably supported on both sides of the disc blade so as to be rotatable coaxially with the disc blade, and an advancing / retreating member for moving the disc blade and the holding roller toward and away from the guide roller. In the coated flexible pipe cutting tool consisting of the above, each of the above-mentioned guide rollers is constituted by a main guide roller positioned in the middle and auxiliary guide rollers positioned on both sides thereof, and at least one of the auxiliary guide rollers has an outer diameter. We have developed a coated flexible pipe cutting tool that features a smaller diameter than the outer diameter of the main guide roller.

Further, in the present invention, in the coated flexible tube cutting tool configured as described above, the outer diameter of the auxiliary guide rollers on both sides is smaller than the outer diameter of the main guide roller. , And a coated flexible pipe cutting tool in which the outer diameter of the auxiliary guide roller is smaller than the outer diameter of the main guide roller by approximately twice the wall thickness of the covering material of the flexible pipe.

[0010]

[Action]

 The operation of the coated flexible pipe cutting tool according to the present invention will be described with reference to one cutting example. Since the present invention is configured as described above, the guide roller, the disc blade, and the holding roller are provided between the guide roller and the disc blade. In addition to interposing a long coated flexible tube to be cut, operate the advancing / retreating member to bring the disk blade and holding roller close to the guide roller to clamp the coated flexible tube and cut with the disk blade according to the usual method. To form a cut end on a long coated flexible tube.

Next, as schematically shown in FIG. 8B, the coating material at the cut end was peeled off over several mountains (about 5 cm) to expose a bare flexible tube at the end. As shown later in an enlarged view in Fig. 5, one auxiliary guide roller (a supplementary roller on the side opposite to the cutting end) of the guide roller is positioned at the end of the covered flexible pipe, and the main guide roller is covered with a bare flexible pipe. Position, and in this state the disk blade and the holding roller are moved forward so that the coated flexible tube is sandwiched between the auxiliary guide roller and the holding roller, and the bare flexible tube is sandwiched between the main guide roller and the holding roller. After that, the bare flexible pipe was cut by the disc blade by rotating the cutting tool, and a bare flexible pipe of the required length for attaching the insertion screw tightening type joint was provided at the end. Perform up cutting.

In the above-mentioned finish cutting, the outer diameter of the auxiliary guide roller that holds the end of the coated flexible tube is slightly smaller than the outer diameter of the main guide roller that holds the bare flexible tube. , The coated flexible tube and the bare flexible tube are clamped at approximately the same pressure, and there is no unreasonable, too strong clamping force applied to the coating material of the coated flexible tube, and therefore wrinkles are surely generated in the coating material. It has a preventive action.

[0013]

【Example】

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

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

Further, the guide roller 2 is a pair of upper and lower hard synthetic resin rollers which are horizontally laid horizontally on the front inner side of the curved frame 7 of the tool main body 1 through two supporting shafts 8 and 8. Each of the guide rollers 2 and 2 is composed of a main guide roller 2a located in the middle and auxiliary guide rollers 2b and 2b located on both sides thereof. Further, in this embodiment, the outer diameters of the two auxiliary guide rollers 2b, 2b are made smaller than the outer diameter of the main guide roller 2a by approximately the same size as the wall thickness of the covering material of the covering flexible pipe.

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

The advancing / retreating member 5 includes a screw 10 inserted into the straight tubular frame 6 from the rear side, and a rotary operation grip fitted to the base end of the screw 10 and a cap nut 12. It is comprised of a cap 13 and a cap nut-shaped advancing / retreating operating rod 14 into 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 rotated to advance / retreat, 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. 3, reference numeral 3'denotes a disc blade for replacement, which is detachably attached by a screw 11 in a recess 15 formed in the rear side surface of the rotary operation grip 13.

Next, one usage state of the embodiment configured as described above will be described together with actions and effects with reference to FIGS. 4, 5 and 8. First, in order to form the end portion of the long covered flexible tube P, although not shown, the covered flexible tube P is interposed between the guide roller 2 and the disc blade 3 and the holding roller 4, and the retracted flexible tube P is advanced and retracted. By operating the operating member 5, the disc blade 3 and the holding roller 4 are brought closer to the guide roller 2 to hold the coated flexible pipe P, and the disc blade 3 is cut by a conventional method to form a long coated flexible pipe P. Form the cut end P1.

Next, as schematically shown in FIG. 8B, the coating material C at the cut end P1 is peeled off over several mountains (about 5 cm) to expose the bare flexible pipe P2 at the end. Then, as shown in the enlarged view of FIG. 5, one auxiliary guide roller 2b (the auxiliary roller on the side opposite to the cutting end) of the guide roller 2 is positioned at the end of the coated flexible pipe P, and the main guide roller 2a Is positioned on the bare flexible pipe P2, and in this state, the trough portion P3 of the bare flexible pipe P2 and the position of the disk blade 3 are aligned, and the rotary operation grip 13 is rotated clockwise to move the forward / backward moving rod 14. When it is moved forward, the end of the coated flexible tube P is securely sandwiched between the one auxiliary guide roller 2b and the one elastic holding roller 4, and the bare flexible tube P2 has the main guide roller 2a and both elastic holding rollers. It is securely held by .4, and the cutting edge of the disk blade 3 is abutted to the valley portion P3 of the bare flexible pipe P2.

In this state, when the rotary operation grip 13 is further rotated clockwise to move the advancing / retreating rod 14 forward, although not shown, the end of the covered flexible pipe P and the bare flexible pipe P2 are elastic. The bare flexible tube P2 is inserted by the disc blade 3 at the valley P3 at the same time as it is more reliably sandwiched by the holding roller 4.4.

Next, the cutting tool is rotated around the covered flexible pipe P, the bare flexible pipe P2 is cut by the disc blade 3, and a bare flexible member having a required length for attaching a plug-in screw tightening type joint is attached. Finishing cutting is performed with the pipe P2 at the end. In this embodiment, the outer diameter of the auxiliary guide roller 2b that holds the end of the coated flexible pipe P is the same as that of the main guide that holds the bare flexible pipe P2. Since the diameter of the roller 2a is smaller than the outer diameter of the roller 2a by approximately the same dimension as the thickness of the coating material C, the coated flexible pipe P and the bare flexible pipe P2 are sandwiched at approximately the same pressure, and the coated flexible pipe P An excessively strong clamping force is not applied to the covering material C, and therefore wrinkles can be reliably prevented from occurring in the covering material C. This effect is obtained by the elastic holding roller 4. , 4a is further improved by being constituted by flexible and rich in elasticity material such as urethane rubber.

As a means for forming a bare flexible pipe P2 of a required length by finishing cutting at the end portion of the covered flexible pipe P for attaching a fitting of a plug-in screw tightening type, in the above embodiment. Means other than those described may be adopted.

Next, FIGS. 6 and 7 show other embodiments of the present invention. The cutting tool shown in FIG. 6 has the elastic holding rollers 4 a, 4 a whose outer diameter is outside the disc blade 3. The cutting tool shown in FIG. 7 is different from the above embodiment in that the diameter is slightly larger than the diameter. Further, in the cutting tool shown in FIG. 7, the outer diameters of the elastic holding rollers 4 a, 4 a are larger than the outer diameter of the disc blade 3. Is different in that the elastic holding rollers 4a, 4a are made of slightly hard elastic synthetic resin, and the other configurations are exactly the same. Since there is almost no difference in the function and effect as a device, the same reference numerals are given to the same parts.

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.

[0025]

[Effect of device]

 The present invention provides 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 coaxially with the disk blades on both sides of the disk blade. In a coated flexible tube cutting tool comprising a holding roller rotatably supported by a shaft and an advancing / retreating operation member for moving the disc blade and the holding roller closer to and away from the guide roller, each of the guide rollers is positioned in the middle. The main guide roller and the auxiliary guide rollers located on both sides of the main guide roller, and the outer diameter of at least one of the auxiliary guide rollers is smaller than the outer diameter of the main guide roller. Since the flexible pipe cutting tool is used as described above, it has the following excellent effects.

(1) Since the outer diameter of the auxiliary guide roller in the guide roller is configured to be smaller than the outer diameter of the main guide roller, it is possible to mount an insertion screw tightening type joint at the end of the coated flexible tube. In order to leave the bare flexible pipe of the required length and finish cutting, the end of the coated flexible pipe is clamped by the auxiliary guide roller and the bare flexible pipe is clamped by the main guide roller. Even if the tool is rotated, an excessively strong clamping force applied to the covering material of the covered flexible tube is not applied, so that wrinkles can be reliably prevented from occurring in this covering material. (2) Therefore, the insertion screw tightening type joint can be easily and surely attached, and since it is not necessary to redo the complicated cutting work due to the occurrence of wrinkles from the beginning, the work efficiency thereof can be remarkably improved.

[Submission date] February 4, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Further, the guide roller 2 is a pair of upper and lower hard synthetic resin rollers which are horizontally laid horizontally on the front inner side of the curved frame 7 of the tool main body 1 through two supporting shafts 8 and 8. Each of the guide rollers 2 and 2 is composed of a main guide roller 2a located in the middle and auxiliary guide rollers 2b and 2b located on both sides thereof. In addition, in this embodiment, the outer diameters of the two auxiliary guide rollers 2b and 2b are smaller than the outer diameter of the main guide roller 2a by a size approximately twice the wall thickness of the covering material of the covering flexible pipe. .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

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

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

[0017] is et al., The forward and backward actuating member 5 is provided with a threaded rod 10 which is inserted from the rear side to the straight pipe frame 6, the screw 11 at its proximal end, rotating operation glyceraldehyde which is fitted through the cap nut 12 It is comprised of a cap 13 and a cap nut-shaped advancing / retreating operating rod 14 into which the screw rod 10 is screwed in the straight tubular frame 6, and the screw rod 10 is rotated right and left by rotating the rotary operation grip 13 left and right. The advancing / retreating operating rod 14 is moved back and forth to move the disc blade 3 and the elastic holding roller 4 close to the guide roller 2 through the support shaft 9 which is horizontally mounted on the tip projection of the advancing / retreating operating rod 14. In FIG. 3, reference numeral 3'denotes a disc blade for replacement which is detachably mounted in the recess 15 formed on the rear side surface of the rotary operation grip 13 by a screw 11.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

Next, the cutting tool is rotated around the coated flexible pipe P, the bare flexible pipe P2 is cut by the disk blade 3, and a bare flexible member having a required length for attaching a plug-in screw tightening type joint is attached. The finish cutting is performed with the tube P2 at the end. In this embodiment, the outer diameter of the auxiliary guide roller 2b that holds the end of the coated flexible tube P is the main guide that holds the bare flexible tube P2. Since the diameter of the roller 2a is smaller than the outer diameter of the roller 2a by about twice the wall thickness of the covering material C, the covering flexible pipe P and the bare flexible pipe P2 are clamped at substantially the same pressure, and the covering flexibility is increased. An unreasonably strong clamping force is not applied to the covering material C of the pipe P, and therefore wrinkles can be surely prevented from being generated in the covering material C. This is further improved by the fact that the rollers 4a, 4a are made of a flexible and elastic material such as urethane rubber.

[Brief description of drawings]

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

FIG. 2 is a side view.

FIG. 3 is a vertical sectional side view.

FIG. 4 is a plan view showing a state in which an end portion of a coated flexible tube and a bare flexible tube portion are sandwiched and held.

5 is an enlarged plan view of part of FIG. 4. FIG.

FIG. 6 is a plan view showing another embodiment.

FIG. 7 is a plan view showing another embodiment.

8A and 8B are explanatory views of a cut state.

[Explanation of symbols]

 1 Cutting Tool Main Body 2 Guide Roller 2a Main Guide Roller 2b Auxiliary Guide Roller 3 Disc Blade 3'Spare Disc Blade 4 Holding Roller 4a Elastic Holding Roller 5 Advancement / Retraction Actuating Member 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 operating rod 15 recess

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 coated flexible pipe cutting tool comprising a holding roller rotatably supported coaxially and a disc blade and an advancing / retreating operation member for moving the holding roller toward and away from the guide roller. A coating characterized in that it is constituted by a main guide roller positioned on both sides and auxiliary guide rollers positioned on both sides thereof, and that the outer diameter of at least one auxiliary guide roller is smaller than the outer diameter of the main guide roller. Flexible pipe cutting tool. 2. The coated flexible pipe cutting tool according to claim 1, wherein the outer diameters of the auxiliary guide rollers on both sides are smaller than the outer diameter of the main guide roller. 3. The outer diameter of the auxiliary guide roller is approximately 2 times the outer diameter of the main guide roller, which is approximately 2 times the wall thickness of the covering material of the flexible pipe.
The coated flexible pipe cutting tool according to claim 1, wherein the coated flexible pipe cutting tool is configured to have a small diameter by a double dimension.