JP2020199588A - Tool for peeling surface of resin-coated pipe and surface peeling method - Google Patents

Abstract

To provide a tool for surface peeling that can peel surfaces of a gas pipe and a city water pipe and the like which are resin-coated, while preventing idling of a resin pipe.SOLUTION: A tool for peeling a surface of a resin-coated pipe 6 is configured so that a tool main body 2 is formed in an annular shape to be insertable into and removable from the resin pipe 6 of a gas pipe or of a city water pipe and a cutting edge part 5 of a blade 4 for surface-peeling is attached to the annular tool main body 2 to be contactable with a resin-coated part of the resin pipe 6 so that the tool main body 2 can be freely slid with an operation handle 11, where the blade 4 for surface-peeling is arranged at a side peripheral part of the tool main body 2 so that the cutting edge part 5 can be protruded by a required quantity, and an inverse-rotation prevention cam 18 is provided in order to prevent idling of the resin pipe 6 so that the tool can peel the surface while preventing idling of the resin pipe 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to a tool for peeling the surface of a resin-coated pipe such as a gas pipe or a water pipe, and a peeling method.

In recent years, resin pipes whose surfaces are coated with a hard resin have been used for gas pipes and water pipes, and in the piping construction, the coating resin at the end of the resin pipe is peeled off and connected to the pipe. It has been.

However, in the construction of pipes for existing gas pipes and water pipes, it was necessary to excavate the construction site buried in the ground and perform the pipe connection work in this excavated deep and narrow place. Also, even on the ground, it was very difficult to work on piping, which is often installed near walls or in narrow spaces.

Conventionally, in the piping work on the ground, it is known that when there is space, the coating layer of the outer cladding tube is peeled off by using a lathe or a milling cutter, but a large and expensive device is used. A small and inexpensive tool that cannot be used in the excavation part of the excavation site has been desired.

Therefore, the present inventor has developed a small ratchet type surface peeling tool as shown in Utility Model Registration No. 3290477.

Utility Model Registration No. 3200797

However, the tool can be peeled without any inconvenience when the diameter of the resin pipe is as small as 20A to 50A, but when the diameter of the resin pipe is as large as 80A or more, the cutting edge amount of the tool body is covered with resin. Due to the tolerance of the pipe, the proper amount of peeling of the resin part cannot be secured, and the surface of the steel pipe may be damaged due to only scraping the surface or cutting too much, and even a resin-coated pipe with a large diameter can be peeled properly. The challenge was to develop a tool for peeling the surface.

The present invention has been made in view of the above points, and in order to solve the above problems, a tool body is formed in an annular shape so as to be removable from a resin pipe of a gas pipe or a water pipe, and the annular tool is formed. An external tooth gear is rotatably attached to the main body, and the cutting edge of the peeling blade is attached so that it can come into contact with the resin coating of the resin tube, and the ratchet can be engaged and disengaged from the external tooth gear of the tool body. This is a tool for peeling the surface of a resin tube with a swingable operation handle. A peeling blade is placed on the side peripheral portion of the tool body so that the required amount of the cutting edge can be projected freely and the resin. Provided is a tool for peeling the surface of a resin pipe, characterized in that a reverse rotation prevention cam is provided so as to be able to come into contact with the resin pipe in order to prevent the pipe from idling.

Further, the peeling blade is mounted so as to be rotatable around one side thereof via an arc plate-shaped mounting adjustment material, and the other side portion of the mounting adjustment material is provided so as to be in contact with the surface of the resin tube. Provided is a tool for peeling the surface of a resin tube, which is characterized in that the depth of cut of the cutting edge of the peeling blade is adjustablely formed corresponding to a resin tube coated with a resin having a predetermined thickness.

Further, the reverse rotation prevention cam is formed in an arc shape along a part of the annular tool body, and the contact state of the reverse rotation prevention cam with the resin pipe corresponds to the contact state between the resin tube and the peeling blade. Provided is a tool for peeling the surface of a resin tube, which is characterized in that it is formed in an adjustable manner.

Furthermore, it is a method of peeling the surface of resin pipes of gas pipes and water pipes, in which a peeling blade is arranged on the side peripheral portion of an annular tool body so that the required amount of the cutting edge portion can be projected freely and the resin pipe. The surface skin of the resin pipe is characterized in that a reverse rotation prevention cam is provided to prevent idling, and the reverse rotation prevention cam is brought into contact with the resin pipe with a predetermined force in response to the contact state between the resin pipe and the peeling blade. It provides a peeling method.

As in claim 1, the tool for peeling the surface of the resin pipe of the present invention has a tool body formed in an annular shape so as to be removable from the resin pipe of a gas pipe or a water pipe, and external teeth are formed on the annular tool body. The gear is mounted swivelly so that the cutting edge of the peeling blade can be attached to the resin coating of the resin tube, and the ratchet is disengaged from the external gear of the tool body so that it can be engaged and disengaged. It is a tool for peeling the surface of a resin tube that can swing freely, and a peeling blade is arranged on the side peripheral portion of the annular tool body so that the required amount of the cutting edge can be projected freely, and the resin tube By providing a reverse rotation prevention cam that can come into contact with the resin tube to prevent idling, the resin tube can be peeled off with a small surface peeling tool, and the cutting edge and resin of the peeling blade attached to the tool body. The resin pipe can be properly sandwiched between the reverse rotation prevention cam for preventing the pipe from spinning, and even if the resin pipe has a large diameter, the resin pipe can be properly peeled off without spinning.

In particular, although it is a mechanism that rotates by a ratchet mechanism in narrow work, when the cutting edge of the blade is shallow or the blade does not bite into the surface resin, the machine prevents rotation by operating the handle, so reverse rotation is prevented. When the cam is in the notched state, it slides on the resin surface, and when it rotates in the opposite direction, the claws of the anti-reverse cam bite into the resin surface to prevent reversal, and the skin can be peeled off properly.

Further, as in claim 2, the peeling blade is rotatably mounted around one side thereof via an arc plate-shaped mounting adjusting material, and the other side of the mounting adjusting material is attached to the surface of the resin pipe. The depth of cut of the mounting adjustment material into the resin pipe is adjusted by forming the cutting depth of the cutting edge of the peeling blade corresponding to the resin-coated resin pipe of a predetermined thickness. The blade can be brought into contact with the surface of the resin tube and can be peeled off from the resin-coated resin tube having a required thickness with a notch amount of a required depth.

Further, as in claim 3, the reverse rotation prevention cam is formed in an arc shape along a part of the annular tool body, and the reverse rotation prevention cam is provided according to the contact state between the resin tube and the peeling blade. By forming the contact state with the resin tube in an adjustable manner, there is no reversal due to ratchet handle operation, and the arc-shaped anti-reverse cam claw along a part of the tool body slides on the resin surface when it is in the notched state. In the opposite rotation, it can bite into the resin surface to prevent reversal, and can be properly peeled as described above.

Further, as in claim 4, it is a method of peeling the surface of a resin pipe of a gas pipe or a water pipe, and a peeling blade is arranged on a side peripheral portion of an annular tool body so that a required amount of the cutting edge portion can be projected freely. In addition to the installation, a reverse rotation prevention cam is provided to prevent the resin pipe from spinning, and the reverse rotation prevention cam is brought into contact with the resin pipe with a predetermined force in response to the contact state between the resin pipe and the peeling blade. Even when the cutting edge of the peeling blade attached to the tool body does not bite into the surface resin of the resin tube, the resin surface can be properly sandwiched by the reverse rotation prevention cam, even if the resin has a large diameter. Even if it is a pipe, the annular tool body suppresses the return force by the operation handle via the ratchet, and the resin pipe can be surely peeled off without idling.

A front view (a) and a side view (b), in which a part of an embodiment of the present invention is omitted, A slightly enlarged mounting state diagram (a) of the above-mentioned peeling blade, a slightly enlarged protruding state diagram (b) of the cutting edge portion, and a side sectional view (c) of the plunger portion. Slightly enlarged backward phase diagram (a) and forward phase diagram (b) of the reverse rotation prevention cam portion as above, The peeling explanatory view which partially omitted the resin tube of the same above.

In the surface peeling tool and peeling method for a resin pipe of the present invention, a tool body is formed in an annular shape so as to be removable from a resin pipe of a gas pipe or a water pipe, and an external gear is swiveled around the annular tool body. It can be freely attached and the cutting edge of the peeling blade can be attached to the resin coating of the resin tube so that it can be attached, and the ratchet can be engaged and disengaged from the external tooth gear of the tool body to swing the operation handle. By freely peeling the surface of the resin tube, a peeling blade is placed on the side peripheral part of the tool body so that the required amount of the cutting edge can be freely projected, and a reverse rotation prevention cam is provided to prevent the resin tube from spinning. It is characterized in that it contacts a pipe with a predetermined contact force so that it can contact the pipe.

As shown in FIGS. 1A and 1B, the surface peeling tool 1 is a concentric circle in which an external tooth gear 3 having a predetermined pitch diameter can be swiveled around a stepped inner peripheral portion of an annular tool body 2 having a predetermined diameter. The peeling blade 4 is attached to one side peripheral portion of the tool body 2 so that the cutting edge portion 5 can be brought into contact with the resin coating portion of the resin tube 6 whose surface is coated with a hard resin. However, the resin coating portion of the resin tube 6 can be peeled off.

As shown in FIGS. 1 (a) and 1 (b), an operation handle mounting portion 7 is integrally projected on one side of the annular tool body 2, and ratchets 8 are arranged in a mountain shape on the inner side thereof. The ratchet claw 10 of the ratchet 8 can be engaged with and disengaged from the external gear 3 by supporting the ratchet 8 with a shaft portion 9 and pressing the holding ball against the mountain portion of the ratchet 8 via a spring having a predetermined elastic force. It is locked. The ratchet claw 10 of the ratchet 8 is tilted in one direction to engage with the external gear 3 so that the ratchet claw 10 can be swiveled in one direction, and the operation handle 11 of a predetermined length attached to the operation handle attachment portion 7 is swung. The external tooth gear 3 is swiveled and driven so that the skin can be peeled off.

The peeling blade 4 is made of the required tool steel, and as shown in FIGS. 2 (a) to 2 (c), the arc plate-shaped mounting adjusting material 12 so that the cutting edge portion 5 can be projected inward by a predetermined amount. The anti-blade edge side can be swiveled around the pivotal attachment portion 13 on the end side of the mounting adjustment material 12 on the blade edge portion side, and the position adjuster 14 of the hooking / detaching pin can be used to set the predetermined retracted position and the skin. It can be hung and removed at the peeling position.

The position adjuster 14 operates a plunger 16 equipped with a spring 15 such as a required elastic coil sprinkle to provide a mounting adjustment member 12 in a fixing opening at a retracted position and a peeling position so as to be removable. The cutting edge portion 5 of the peeling blade 4 is projected by a required amount so that the resin coating portion on the surface of the resin tube 6 can be peeled off.

In particular, the pivot support 17 is eccentrically attached to the pivot portion 13 on which the peeling blade 4 is rotatably mounted around one side portion, and the other side portion of the mounting adjustment member 12 is attached to the surface of the resin pipe 6. The depth of cut is provided so as to be adjustable so as to abut, so that the surface of the coated steel pipes of the resin pipes 6 having different coating thicknesses can be prevented from being scratched. As a means for adjusting the cutting depth, a mark or the like of a dial memory is engraved on the pivot support 17 and the cutting edge portion 5 of the peeling blade 4 is eccentric to the required amount of protrusion.

Further, as shown in FIGS. 3A and 3B, a reverse rotation prevention cam is provided on the other side peripheral portion of the facing portion to which the peeling blade 4 of the annular tool body 2 is attached to prevent the resin pipe 6 from idling. 18 is provided so as to be in contact with the resin pipe 6, and the resin pipe 6 is sandwiched by an appropriate force between the cutting edge portion 5 of the peeling blade 4 attached to the tool body 4 and the reverse rotation prevention cam 18 for preventing the resin pipe 6 from idling. Even if the resin tube 6 has a large diameter, the resin tube 6 can be surely peeled off without idling.

The reverse rotation prevention cam 18 is formed in an arc shape along a part of the annular tool body 2 as shown in FIGS. 3A and 3B, and its side end is pivotally attached to the cam pivot support 19. A required coil spring 20 is mounted so that the contact state of the reverse rotation prevention cam 18 with the resin tube 6 can be adjusted according to the contact state between the resin tube 6 and the peeling blade 4. The reverse rotation prevention cam 18 has a required cam curve so that the protruding claw 21 of the protruding portion can be hooked on the resin pipe 6 to prevent the reverse rotation.

Further, as shown in FIGS. 1 (a) and 1 (b), the external tooth gear 3 is equipped with a cover for attachment / detachment (outside the figure) via a fixing pin (outside the figure). Reference numeral 22 denotes a stopper at the time of peeling.

The surface peeling tool 1 is preferably a required resin tube 6 having a large diameter of 80 A or more, but can also be applied to a small diameter tool such as 25 A to 50 A, and other purposes of the present invention. Based on this, an appropriate embodiment can be adopted.

The following is an embodiment of the present invention. As shown in FIGS. 1A and 1B, the surface peeling tool 1 is provided with an annular tool body 2 having a predetermined diameter and an external gear 3 having a predetermined pitch diameter rotatably provided, and an operation handle of the tool body 2. A peeling blade 4 is attached to the facing portion of 11, the ratchet claw 10 of the ratchet 8 is engaged, and the operation handle 11 is swung to peel off the resin coating portion on the surface of the large diameter resin tube 6 of 200 A. I am trying to do it.

The peeling blade 4 is made of the required tool steel, and is attached to the arc plate-shaped mounting adjustment material 12 so that the blade edge portion 5 can be projected by the required amount, and the blades 4 are attached to the arc plate-shaped mounting adjustment material 12 and shown in FIGS. As described above, the anti-blade edge side can be swiveled around the pivot portion 13 of the mounting adjustment member 12 on the blade edge portion side, and the hooking / detaching pin type position adjuster 14 can be installed at a predetermined retracted position and peeling position. ing.

Then, the reverse rotation prevention cam 18 can be brought into contact with the resin pipe 6 with a predetermined force to prevent the resin pipe 6 from idling on the side peripheral portion of the facing portion to which the peeling blade 4 of the annular tool body 2 is attached. It is provided to prevent the resin pipe 6 from idling so that even if the resin pipe 6 has a large diameter, the resin pipe 6 can be surely peeled off without idling.

The reverse rotation prevention cam 18 is formed in an arc shape along a part of the annular tool body 2 as shown in FIGS. 3 (a) and 3 (b), and a required coil spring 20 is attached to the resin tube 6. It is possible to prevent the resin tube 6 from being caught and reversed by the protruding claw 21 having the required contact force and the required cam curve.

For example, when peeling off the end face portion of the resin pipe 6 of a gas pipe coated with a large diameter resin of 200 A, a pipe stopper 22 is attached at a required position of the resin pipe 6 as shown in FIG. The surface peeling tool 1 is inserted into the pipe, the plunger 16 of the position adjusting tool 14 is operated to project the required amount of the cutting edge portion 5 of the peeling blade 4, and the pivot tool 17 for adjusting the cutting depth is eccentric. The cutting edge portion 5 of the required peeling blade 4 is projected, and the reverse rotation prevention cam 18 coil spring 20 is adjusted to bring the protruding claw 21 into contact with the resin pipe 6.

Then, when the ratchet 8 is tilted toward the peeling direction, the ratchet claw 10 is engaged with the external gear 3, and the operation handle 11 is swung, the resin coating portion on the surface of the resin tube 6 is spirally cut. By swinging the operation handle 11 until it hits the stopper 22, the resin coating portion at the end of the resin tube 6 can be neatly peeled off.

In this way, the resin tube 6 can be peeled off with the small surface peeling tool 1, and the reverse rotation prevention cam 18 for preventing the resin tube 6 from idling and the cutting edge portion 5 of the peeling blade 4 attached to the tool body 2 The resin tube 6 can be properly sandwiched by the above, and even if the resin tube 6 has a large diameter, the resin tube 6 can be reliably peeled off without idling.

Therefore, when the notch of the cutting edge portion 5 is shallow, when the cutting edge portion 5 does not bite into the surface resin, the tool body 2 prevents rotation by operating the handle, and when the reverse rotation prevention cam 18 is in the notched state, the resin surface is cut. When slipping and rotating in the opposite direction, the protruding claw 21 of the reverse rotation prevention cam 18 bites into the resin surface to prevent reverse rotation, and the skin can be peeled off.

Further, by adjusting the depth of cut of the mounting adjusting material 12 into the resin pipe 6, the surface of the resin pipe 6 can be properly contacted, and the resin pipe 6 of the resin coating having the required thickness is spirally formed with the depth of cut of the required depth. Can be peeled off.

Although the gas pipe has been described above, the same applies to the water pipe, and the peeling blade preferably has the above shape, but an appropriate shape can also be implemented based on the gist of the present invention. It is a thing. Further, the present invention is not limited to the use in a narrow construction place as described above, and can be used in other necessary places.

The present invention can be used for peeling the surface of the end portion of a resin-coated pipe such as a gas pipe or a water pipe.

1 ... Surface peeling tool 2 ... Tool body 4 ... Peeling blade 5 ... Blade tip 6 ... Resin pipe 11 ... Operation handle 18 ... Reverse rotation prevention cam

Claims (4)

A tool body is formed in an annular shape so that it can be inserted and removed from the resin pipe of a gas pipe or water pipe, and an external gear is rotatably attached to the annular tool body, and the cutting edge of the peeling blade is made of resin pipe resin. A tool for peeling the surface of a resin tube that is attached to the covering part so as to be abuttable and has a ratchet disengaged from the external gear of the tool body to allow the operation handle to swing freely.
A peeling blade is arranged on the side peripheral portion of the tool body so that the required amount of the blade edge can be projected freely, and a reverse rotation prevention cam is provided so as to come into contact with the resin pipe in order to prevent the resin pipe from idling. A tool for peeling the surface of a characteristic resin tube. The peeling blade is mounted so as to be swivelable around one side via an arc plate-shaped mounting adjustment material, and the other side of the mounting adjustment material is provided so as to be in contact with the surface of the resin tube to have a predetermined thickness. The tool for peeling the surface of a resin tube according to claim 1, wherein the cutting depth of the cutting edge portion of the peeling blade is adjustablely formed corresponding to the resin tube coated with the resin. The reverse rotation prevention cam is formed in an arc shape along a part of the annular tool body, and the contact state of the reverse rotation prevention cam with the resin tube can be adjusted according to the contact state between the resin tube and the peeling blade. The tool for peeling the surface of a resin tube according to claim 1 or 2, wherein the tool is formed in. It is a method of peeling the surface of resin pipes of gas pipes and water pipes.
A peeling blade is arranged on the side peripheral portion of the annular tool body so that the required amount of the blade tip can be projected freely, and a reverse rotation prevention cam is provided to prevent the resin pipe from idling, and the resin pipe and the peeling blade are provided. A method of peeling the surface of a resin pipe, which comprises contacting a reverse rotation prevention cam with a resin pipe with a predetermined force in response to the contact state of the resin pipe.

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