Coating removal tool

Abstract

To efficiently remove a coating material covering the outside and inside of a pipe joint without any trouble.SOLUTION: A coating removal tool 10 removes a coating material of a joint part in which a spiral groove is formed, the coating removal tool comprising a rod-shaped body part 1 having a handle 11 that can be held by hand, and a first removal blade part 2 provided at one longitudinal end part of the body part. The first removal blade part 2 has a blade 21 consisting of a plurality of peaks and valleys along a longitudinal direction of the body part 1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a coating remover for removing a coating material applied to a joint portion of a pipe. [Background technology]

[0002] Pipes such as water pipes and gas pipes are connected to each other using joints with spiral grooves. To maintain airtightness inside the pipes, a coating such as sealing tape is attached to the grooves of the joints. Therefore, when reusing pipes that have already been connected, this coating must be removed.

[0003] Removing this coating material is a time-consuming and labor-intensive process, and therefore, it is desirable to remove the coating material efficiently.

[0004] Patent Document 1 describes the configuration of a sheath remover in which a blade is provided at the tip of a contact part in the shape of a ring wound in multiple turns. [Prior art documents] [Patent documents]

[0005] Patent Document 1: Patent No. 5519392 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the device described in Patent Document 1 has the problem that it is time-consuming to fit the multiple-wound ring-shaped abutment portion into the spiral groove, and it cannot be applied to grooves formed inside a pipe.

[0007] An object of the present invention is to solve the above problems and to make it possible to remove coating materials that cover the exterior and interior of pipe joints efficiently without much effort. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a coating remover for removing a coating material from a joint portion having a spiral groove formed therein, A substantially rod-shaped main body having a handle that can be held by hand; a first removal blade provided at one longitudinal end of the main body, The present invention provides a sheath remover characterized in that the first removal blade portion has a blade having a plurality of peaks and valleys in the longitudinal direction of the main body portion.

[0009] This configuration makes it possible to remove the coating material from the grooves cut on the exterior and interior of the pipe joint efficiently and without much effort.

[0010] In the sheath remover, the first removal blade portion may have two rows of blades each consisting of a plurality of peaks and valleys in the longitudinal direction of the main body portion, the two rows being spaced apart by a predetermined width.

[0011] This configuration provides two rows of blades each consisting of a plurality of peaks and valleys, thereby improving the efficiency of coating removal.

[0012] The sheath removal tool may be configured such that the thickness of the main body at the position where the first removal blade is provided is thinner than the thickness of the handle.

[0013] With this configuration, the coating removal tool can be inserted into the inside of the pipe to easily remove the coating from the groove inside the pipe.

[0014] The sheath removal tool may be configured such that a second removal blade portion having a blade consisting of a plurality of peaks and valleys in the longitudinal direction of the main body portion is provided at the other longitudinal end opposite to the one longitudinal end at which the first removal blade portion is provided, and the pitch between the peaks in the second removal blade portion is different from the pitch between the peaks in the first removal blade portion.

[0015] This configuration makes it easy to apply to pipe joints with different groove pitches.

[0016] The sheath removal tool may be configured such that the second removal blade portion has two rows of blades, each consisting of a plurality of peaks and valleys, spaced a predetermined width apart in the longitudinal direction of the main body, and the predetermined width between the blades in the two rows of the first removal blade portion is different from the predetermined width between the blades in the two rows of the second removal blade portion.

[0017] This configuration makes it possible to easily apply the joint to pipes of different diameters. [Effects of the Invention]

[0018] The coating remover of the present invention makes it possible to efficiently remove the coating material that covers the exterior and interior of a pipe joint without much effort. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 2 is a diagram illustrating a sheath remover in the first embodiment of the present invention. [Figure 2] FIG. 1 is a diagram illustrating a first method of using the sheath remover according to the first embodiment of the present invention. [Figure 3] 10A and 10B are diagrams illustrating a second method of using the sheath remover in the first embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0020] A sheath removal tool according to a first embodiment of the present invention will be described with reference to Figs. 1 to 3. Fig. 1 is a diagram illustrating the sheath removal tool according to the first embodiment of the present invention. Fig. 2 is a diagram illustrating a first method of using the sheath removal tool according to the first embodiment of the present invention. Fig. 3 is a diagram illustrating a second method of using the sheath removal tool according to the first embodiment of the present invention.

[0021] The sheath removal tool 10 in Example 1 includes a generally rod-shaped main body 1 having a handle 11 that can be held by hand, and a first removal blade 2 provided at at least one end in the longitudinal direction (x direction in FIG. 1) of the main body 1. The main body 1 is made of wood, and as shown in FIG. 1, the thickness D2 in the y direction of the end of the main body is thinner than the thickness D1 in the y direction of the handle 11. This allows the first removal blade 2 to be inserted into the inside of a pipe to remove the sheath material, as will be described later.

[0022] In the first embodiment, the main body 1 is made of a generally rod-shaped piece of wood, but this is not necessarily limited to this and can be modified as appropriate. For example, the main body 1 may be slightly curved, or may be made of metal or synthetic resin other than wood.

[0023] The first removal blade portion 2 is made of metal and has two rows of blades 21 each consisting of a plurality of peaks and valleys in the longitudinal direction (x direction) of the main body portion 1, the two rows being spaced apart by a predetermined width B.

[0024] A second removal blade 3 having two rows of blades 31 consisting of multiple peaks and valleys in the longitudinal direction (x direction) of the main body 1 is provided at the other end of the main body 1 opposite to the end where the first removal blade 2 is provided. The two rows of blades 31 in the second removal blade 3 are spaced apart by a predetermined width b. The pitch A between the peaks of the blades 21 of the first removal blade 2 is 2.3091 mm, and the pitch a between the peaks of the blades 31 of the second removal blade 3 is 1.8143 mm.

[0025] The crest pitch A of the first removal blade 2 is 2.3091 mm, and the crest pitch a of the second removal blade 3 is 1.8143 mm, so that the pitch of the first removal blade 2 is the same as that of the thread nominals R1 to R6 in the standards for tapered threads in pipe fittings, making it possible to remove coating material wrapped around the tapers of these thread nominals, and the pitch of the second removal blade 3 is the same as that of the thread nominals R1 / 2 and R3 / 4, making it possible to remove coating material wrapped around the tapers of these thread nominals. In this way, the different crest pitches of the first removal blade 2 and the second removal blade 3 make it possible to remove coating material from most tapered threads.

[0026] Furthermore, the predetermined width b of the second removal blade portion 3 is different from the predetermined width B of the first removal blade portion 2. That is, there is a relationship of B>b, where B=24 mm and b=18 mm. However, the predetermined width B and the predetermined width b are not limited to this and can be changed as appropriate. For example, they may be B=25 mm or more and b=17 mm or less, or B=23 mm or less and b=19 mm or more, as long as the first removal blade portion 2 and the second removal blade portion 3 can accommodate pipes with a wide range of diameters, from large to small.

[0027] The different crest pitch of the first removal blade 2 and the second removal blade 3 allows for coating material removal from most tapered threads cut into joints, from small to large. Also, the different predetermined width of the first removal blade 2 and the second removal blade 3 allows for coating material removal from pipes with large to small diameters.

[0028] In Example 1, the first removal blade 2 is provided at one longitudinal end of the main body 1, and the second removal blade 3 is provided at the other longitudinal end of the main body opposite the end where the first removal blade 2 is provided. However, this is not necessarily limited to this configuration and can be modified as appropriate. For example, the first removal blade 2 may be formed at one end of a long metal piece with a U-shaped cross section, and the second removal blade 3 may be formed at the other end. In this case, the main body may be formed of a synthetic resin or the like in a portion that serves as a handle. Furthermore, the U-shaped cross section of the long metal piece may be configured so that the U-shape of the cross section becomes smaller from one end to the other end. This allows the predetermined width of the second removal blade 3 to be smaller than the predetermined width of the first removal blade 2.

[0029] The thickness D1 of the handle portion 11 of the main body 1 is 20 mm, and the thickness D2 at the end of the main body 1 is 13 mm, so that the thickness D2 of the main body 1 at the positions where the first removal blade portion 2 and the second removal blade portion 3 are provided is thinner than that of the handle 11. This allows the coating material remover of Example 1 to be inserted into the inside of a pipe to remove the coating material. The body 1 at the positions where the first removal blade portion 2 and the second removal blade portion 3 are provided may be thinner than the handle 11 and may be arc-shaped. This allows the coating material remover 10 of Example 1 to be inserted further into the inside of a pipe to remove the coating material.

[0030] In Example 1, the configuration includes both the first removal blade portion 2 and the second removal blade portion 3, but this is not necessarily limited to this and can be modified as appropriate. For example, if the target pipe is limited, the configuration may include only the first removal blade portion 2, or only the second removal blade portion 3.

[0031] Next, a first method of use of the sheath remover in Example 1 of the present invention will be described. Method 1 of use is for grooves cut in the outer surface of a pipe joint. That is, as shown in FIG. 2, the first removal blade 2 or the second removal blade 3 is pressed against the groove cut in the outer surface of the joint and moved along the groove, thereby easily removing the sheath material. In this case, for pipes with thread nominals of R1 to R6, the first removal blade 2 is pressed against the groove while being moved along the groove. Furthermore, for pipes with thread nominals of R1 / 2 and R3 / 4, the second removal blade 3 is pressed against the groove while being moved along the groove.

[0032] Next, a second method of use of the sheath remover in Example 1 of the present invention will be described. Method 2 of use is for grooves cut on the inner surface of a pipe joint. That is, as shown in FIG. 3 , the first removal blade 2 or the second removal blade 3 is pressed against the groove cut on the inner surface of the joint and moved along the groove, thereby easily removing the sheath material. In this case, for pipes with thread nominals of R1 to R6, the first removal blade 2 is pressed against the inner groove while being moved along the groove. In addition, for pipes with thread nominals of R1 / 2 and R3 / 4, the second removal blade 3 is pressed against the inner groove while being moved along the groove.

[0033] Thus, in Example 1, a coating removal tool for removing a coating material from a joint portion having a spiral groove formed therein comprises a substantially rod-shaped main body portion having a handle that can be held by hand, and a first removal blade portion provided at one longitudinal end of the main body portion, wherein the first removal blade portion has a blade consisting of a plurality of peaks and valleys in the longitudinal direction of the main body portion, and this coating removal tool makes it possible to efficiently remove coating material that has coated the exterior and interior of a pipe joint without much effort. [Industrial Applicability]

[0034] The coating remover of the present invention can be widely applied in the field of piping. [Explanation of symbols]

[0035] 1: Body part 2: First blade removal part 3: Second blade removal part 10: Coating material removal tool 11: Holding hand 21: Blade 31: Blade T: Tube S: Coating material

Claims

1. A coating removal tool for removing a coating material from a joint portion having a spiral groove formed therein, A substantially rod-shaped main body having a handle that can be held by hand; a first removal blade provided at one longitudinal end of the main body, The sheath remover is characterized in that the first removal blade portion has a blade having a plurality of peaks and valleys in the longitudinal direction of the main body portion.

2. 2. The sheath remover according to claim 1, wherein the first removal blade portion has two rows of blades each consisting of a plurality of ridges and valleys in the longitudinal direction of the main body portion, the two rows being spaced apart by a predetermined width.

3. The sheath remover according to claim 1, wherein the thickness of the main body at the position where the first removal blade is provided is thinner than that of the handle.

4. A sheath remover according to any one of claims 1 to 3, characterized in that a second removal blade portion having a blade consisting of a plurality of peaks and valleys in the longitudinal direction of the main body portion is provided at the other longitudinal end of the main body portion opposite to the one longitudinal end at which the first removal blade portion is provided, and the pitch between the peaks in the second removal blade portion is different from the pitch between the peaks in the first removal blade portion.

5. 5. The sheath remover according to claim 4, wherein the second removal blade portion has two rows of blades, each row consisting of a plurality of peaks and valleys, spaced a predetermined width apart in the longitudinal direction of the main body portion, and the predetermined width between the blades in the two rows of the first removal blade portion is different from the predetermined width between the blades in the two rows of the second removal blade portion.

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