Scraper device

Abstract

To provide a scraper device that improves the ability to follow the side surface of a workpiece. [Solution] The scraper device 1 is a scraper device 1 for cutting the side surface 350 of the end 310 of a pipe material 300 having a tubular end 310, and comprises a side blade member 6, a biasing member 7, and an elastic support part 8. The side blade member 6 is capable of cutting the side surface 350 when in contact with the side surface 350 of the end 310. The biasing member 7 is connected to the side blade member 6 and biases the side blade member 6 toward the side surface 350 of the end 310 by bringing it into contact with the side surface 350 of the end 310. The elastic support part 8 elastically supports the side blade member 6 from the back surface 6a, which is the surface opposite to the biasing direction of the biasing member 7.

Description

Technical Field

[0001] The present disclosure relates to a scraper device.

Background Art

[0002] As water pipes, gas pipes, etc., resin pipes and fittings are used, and when connecting to other pipes and fittings at a construction site or the like, electric fusion fittings or the like are used. For example, when connecting two pipes with an electric fusion fitting, in order to prevent fusion defects, the side and end faces of the pipe are scraped with a scraper device, and then the pipe is inserted into the electric fusion fitting, and a heating element arranged in the electric fusion fitting is heated.

[0003] As a scraper device for scraping a work member such as a pipe or a fitting, for example, it is disclosed in Patent Document 1. The scraper device disclosed in Patent Document 1 is provided with a blade for cutting the side face of the work member and a blade for cutting the end face of the work member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the scraper device shown in the above Patent Document 1, the blade for cutting the side face is pressed against the side face of the work member by a leaf spring, but the blade cannot sufficiently follow the side face with respect to the variation due to the deformation of the work member, so the cutting thickness cannot be cut with a stable and uniform thickness. [[ID=4,1]]

[0006] An object of the present disclosure is to provide a scraper device with improved followability to the side face of a work member.

Means for Solving the Problems

[0007] To achieve the above objective, the scraper device according to the first embodiment is a scraper device for cutting the side surface of the end of a workpiece member having a tubular end, and comprises a side blade member, a biasing member, and an elastic support part. The side blade member is capable of cutting the side surface when in contact with the side surface of the end. The biasing member is connected to the side blade member and biases the side blade member toward the side surface of the end by bringing it into contact with the side surface of the end. The elastic support part elastically supports the side blade member from the back surface, which is the surface opposite to the biasing direction of the biasing member.

[0008] This allows the elastic support to conform the side cutting member to the side of the end even if the pressing force applied by the biasing member to the end of the side cutting member changes due to deformation of the workpiece. As a result, variations in cutting thickness can be reduced, and stable cutting can be achieved.

[0009] A scraper device according to a second embodiment is a scraper device according to a first embodiment, wherein the elastic support portion has an adjustment mechanism that can adjust the elastic force supporting the side blade member.

[0010] This allows the elastic force to be adjusted to obtain an appropriate support force according to the characteristics of the workpiece member and the biasing member.

[0011] A scraper device according to a third embodiment is a scraper device according to a second embodiment, wherein the elastic support further comprises a coil spring. The adjustment mechanism comprises a fixing member and a support member. The fixing member is fixed to the coil spring. The support member extends toward the back of the side blade member and supports the fixing member. The fixing member is movable along the support member.

[0012] In this way, the elastic force of the coil spring relative to the side blade member can be adjusted by moving the fixed member along the support member. This ensures a stable elastic force relative to the side blade member by the elastic support part, and allows for precise adjustment of the elastic force.

[0013] A scraper device according to a fourth embodiment is a scraper device according to a first embodiment, wherein the elastic support portion supports the central portion of the side blade member in the width direction. The width direction is the direction along the axis of the end portion when in contact with the side blade member.

[0014] This improves the stability of the load-bearing capacity.

[0015] A scraper device according to a fifth embodiment is a scraper device according to a first embodiment, further comprising a contact surface to which the end face of the end contacts when the side surface of the end contacts the side blade member. The elastic support portion supports the portion of the side blade member that is on the contact surface side of the central portion in the width direction. The width direction is along the axis of the end when it is in contact with the side blade member.

[0016] This improves the stability of the load-bearing capacity.

[0017] The scraper device according to the sixth embodiment is the scraper device according to the first embodiment, wherein the side blade member has multiple blade portions arranged at its tip in the width direction of the side blade member. The width direction is the direction along the axis of the end portion when it is in contact with the side blade member.

[0018] For example, by using a pipe or joint member with different colors on its outer and inner sides, at least a portion of the area scraped by one of the side cutting edges is positioned so that it is visible from the end of the electrofusion joint before and after fusion. This makes it possible to visually confirm whether or not scraping has been performed on the end of the pipe or joint member.

[0019] A scraper device according to the seventh embodiment is a scraper device according to the first embodiment, further comprising a frame portion that forms an arrangement portion in which the end of a workpiece member is positioned so that the side blade member abuts against the side surface. The biasing member and the elastic support portion are fixed to the frame portion.

[0020] This allows the side cutting member to follow the side surface of the end of the workpiece member placed in the placement section.

[0021] The scraper device according to the eighth aspect is the scraper device according to the seventh aspect, wherein the biasing member is a leaf spring, one first end of the biasing member is connected to the end of the side cutting edge member, and the other second end of the biasing member is fixed to the frame portion.

[0022] Thus, even when the pressing force of the cantilever leaf spring-shaped biasing member against the end of the pipe of the side cutting edge member changes, the elastic support portion can cause the side cutting edge member to follow the side of the end.

[0023] The scraper device according to the ninth aspect is the scraper device according to the seventh aspect, wherein the frame portion has a contact surface against which the end surface of the end portion in a state where the side surface of the end portion abuts against the side cutting edge member abuts. The scraper device further includes an end cutting edge member that is disposed on the contact surface and abuts against the end surface of the end portion to be able to cut the end surface.

[0024] Thus, the end surface can be cut together with the side surface of the end portion of the work member.

Effect of the Invention

[0025] According to the present disclosure, it is possible to provide a scraper device with improved followability to the side surface of a work member.

Brief Description of the Drawings

[0026] [Figure 1] Perspective view of the scraper device according to the embodiment of the present disclosure. [Figure 2] Perspective view of the scraper device according to the embodiment of the present disclosure. [Figure 3] Plan view of the scraper device according to the embodiment of the present disclosure. [Figure 4] Perspective view showing a state where a pipe is inserted into the scraper device according to the embodiment of the present disclosure. [Figure 5] (a) Perspective view showing the end of a pipe, (b) Perspective view showing the end of the pipe after being cut by the scraper device. [Figure 6]Figure 3 shows the first and second frame members omitted. [Figure 7] Perspective view of Figure 6. [Figure 8] (a) Cross-sectional view of the locking mechanism between the FFs in Figure 7; (b) Diagram showing the state after the locking mechanism has been released from the state in Figure 8(a); (c) Diagram showing the state after the gap between the first end of the third frame member and the first end of the fourth frame member has been widened from the state in Figure 8(b). [Figure 9] Figure 7 shows a perspective view of the vicinity of the side blade member. [Figure 10] A bottom view showing the arrangement of the side blade members and the pipe material. [Figure 11] A perspective view of the area near the elastic support shown in Figure 7. [Figure 12] A plan view of the vicinity of the elastic support shown in Figure 6. [Figure 13] (a) Plane section view of the elastic support part in Figure 12, (b) Sectional view illustrating adjustment to increase the elastic force of the elastic support part, (c) Sectional view illustrating adjustment to decrease the elastic force of the elastic support part. [Figure 14] (a), (b) Diagrams showing examples of positions where the elastic support portion supports the side support portion. [Figure 15] A diagram illustrating the fusion of a pipe material scraped with the scraper device of this embodiment with an electrofusion joint. [Figure 16] A diagram illustrating the fusion of a pipe material scraped with the scraper device of this embodiment with an electrofusion joint. [Modes for carrying out the invention]

[0027] Embodiments relating to this disclosure will be described below with reference to the drawings.

[0028] (Overview of scraper device 1 and pipe material 300) Figure 1 is a perspective view of the scraper device 1 according to this embodiment. Figure 2 is a perspective view of the scraper device 1 viewed from a different direction than in Figure 1. Figure 3 is a plan view of the scraper device 1. Figure 4 is a perspective view showing the scraper device 1 with a pipe material 300 (an example of a workpiece member) inserted.

[0029] The pipe material 300 is inserted into the scraper device 1 shown in Figures 1 to 3, and as shown in Figure 4, the scraper device 1 is rotated in one direction A relative to the pipe material 300, thereby scraping the side and end faces of the end of the pipe material 300.

[0030] First, we will describe the pipe material 300 that is scraped by the scraper device 1.

[0031] Figure 5(a) is a perspective view showing the end 310 of the pipe 300. Figure 5(b) is a perspective view showing the end 310 of the pipe 300 after it has been scraped by the scraper device 1. In Figure 5(b), dots are marked on the scraped portion.

[0032] The pipe material 300 is made of a thermoplastic resin. Specifically, the pipe material 300 is made of a polyolefin resin such as polyethylene or polypropylene.

[0033] As shown in Figure 5(b), the end face 320, the first side portion 330, and the second side portion 340 of the pipe material 300 have been scraped. The end face 320 is the end face of the end portion 310 of the pipe material 300. The first side portion 330 is a portion of the side portion 350 that extends from the end face 320 along the axial direction J of the pipe material 300 within a predetermined range. The second side portion 340 is a portion of the side portion 350 that is formed at a predetermined distance from the first side portion 330 in the axial direction J within a predetermined range. Between the first side portion 330 and the second side portion 340 of the pipe material 300, there is an unscraped, untreated portion 360.

[0034] A coating is formed on the side surface 350 of the pipe material 300, and this coating is a different color from the rest of the pipe. For example, the coating can be blue, and the inner portion of the side surface 350 can be made white. In this case, the first side surface 330 and the second side surface 340 will be white, and the rest of the side surface 350 will be blue.

[0035] Next, we will describe the scraper device 1 for scraping the end face 320, the first side portion 330, and the second side portion 340 of the pipe material 300.

[0036] (Scraper device 1) As shown in Figures 1 and 2, the scraper device 1 comprises a frame portion 2, a locking portion 3, a plurality of rollers 4a to 4c, an end-face blade member 5, a side blade member 6, a biasing member 7, an elastic support portion 8, and a pair of gripping portions 9.

[0037] As shown in Figure 2, the frame section 2 forms a placement section 2S, which is a space for positioning the end portion 310 of the pipe material 300. As will be described in detail later, the locking section 3 unlocks the frame section 2 to position the pipe material 300, and locks it after the pipe material 300 has been positioned. Multiple rollers 4a to 4c are rotatably arranged on the frame section 2. The rollers 4a to 4c rotatably hold the end portion 310 of the pipe material 300. The end face cutting member 5 cuts the side surface 350 of the end portion 310. The side cutting member 6 cuts the side surface 350 of the pipe material 300. The biasing member 7 biases the side cutting member 6 toward the side surface 350 of the pipe material 300. The elastic support section 8 elastically supports the side cutting member 6 from the back surface 6a opposite to the pipe material 300. The pair of gripping sections 9 are gripped by the operator when rotating the scraper device 1 relative to the pipe material 300.

[0038] (Frame part 2) As shown in Figures 1 and 2, the frame section 2 includes a first frame member 11, a second frame member 12, a third frame member 13, a fourth frame member 14, a first column member 21, a second column member 22, a third column member 23, a fourth column member 24, a fifth column member 25, and a sixth column member 26.

[0039] The first frame member 11 is a plate-shaped member. The inner peripheral edge 11a of the first frame member 11 is formed on a circumference centered on axis B so as to follow the side surface 350 of the pipe 300. The first frame member 11 is formed in a semi-circular shape. Axis B coincides with the central axis of the pipe 300 when the pipe 300 is placed in the scraper device 1 as shown in Figure 4. In this specification, "coincides" is not in a strict sense, but includes errors and a range that can be recognized as coincidence according to common sense. Also, in this specification, "parallel" and "following" are not in a strict sense, but include errors and a range that can be recognized as parallel according to common sense. Also, in this specification, "perpendicular" is not in a strict sense, but includes errors and a range that can be recognized as perpendicular according to common sense.

[0040] The second frame member 12 is a plate-shaped member. The inner peripheral edge 12a of the second frame member 12 is formed on a circumference centered on axis B so as to follow the side surface 350 of the pipe material 300. The second frame member 12 is formed in a semi-annular shape. In the radial direction C (see Figure 1) perpendicular to axis B, the second frame member 12 is positioned opposite the first frame member 11. Also, the circumferential direction D with axis B as the center is shown in Figure 1. The entire circumferential surface of the side surface 350 of the pipe material 300 is sandwiched between the inner peripheral edge 11a of the first frame member 11 and the inner peripheral edge 12a of the second frame member 12.

[0041] The third frame member 13 is positioned opposite the first frame member 11 in a direction parallel to axis B. The third frame member 13 is a plate-shaped member. As shown in Figure 3, the third frame member 13 protrudes further toward axis B than the first frame member 11. The inner peripheral edge 13a of the third frame member 13 is positioned toward axis B than the inner peripheral edge 11a of the first frame member 11. The third frame member 13 is formed in a semi-annular shape.

[0042] The fourth frame member 14 is positioned opposite the second frame member 12 in a direction parallel to axis B. The fourth frame member 14 is positioned opposite the third frame member 13 in the radial direction C. The fourth frame member 14 is a plate-shaped member. As shown in Figure 3, the fourth frame member 14 protrudes further toward axis B than the second frame member 12. The inner peripheral edge 14a of the fourth frame member 14 is positioned closer to axis B than the inner peripheral edge 12a of the second frame member 12. The fourth frame member 14 is formed in a semi-annular shape.

[0043] The end face 320 of the pipe material 300 comes into contact with the portion of the third frame member 13's surface 13s (an example of a contact surface) on the first frame member 11 side that protrudes in the direction of axis B more than the first frame member 11, and with the portion of the fourth frame member 14's surface 14s (an example of a contact surface) on the second frame member 12 side that protrudes in the direction of axis B more than the second frame member 12.

[0044] Figure 6 is a plan view showing the scraper device 1 with the first frame member 11 and the second frame member 12 omitted. Figure 7 is a perspective view of Figure 6.

[0045] As shown in Figures 1, 2, 6, and 7, the first column member 21, the second column member 22, the third column member 23, and the fourth column member 24 are positioned between the first frame member 11 and the third frame member 13, connecting the first frame member 11 and the third frame member 13. The first column member 21, the second column member 22, the third column member 23, and the fourth column member 24 are fixed to the first frame member 11 and the third frame member 13, for example, by screws.

[0046] As shown in Figure 6, the first column member 21 is positioned between the first end 11b of the first frame member 11 in the circumferential direction D and the first end 13b of the third frame member 13 in the circumferential direction D. The first end 11b and the first end 13b face each other in the direction of axis B. A locking pin 35, which is locked by a locking part 3 described later, is positioned on the first column member 21. As shown in Figure 7, a notch 21a is formed on the end of the first column member 21 on the fourth frame member 14 side. The locking pin 35 is fixed to the first column member 21 by passing through the notch 21a along axis B.

[0047] The second column member 22 is positioned between the second end 11c of the first frame member 11, opposite the first end 11b in the circumferential direction D, and the second end 13c of the third frame member 13, opposite the first end 13b in the circumferential direction D. The second ends 11c and 13c face each other in the direction of axis B. As shown in Figure 1, the second column member 22 is positioned from between the first frame member 11 and the third frame member 13 to between the second frame member 12 and the fourth frame member 14.

[0048] As shown in Figures 6 and 7, the third column member 23 and the fourth column member 24 are positioned between the first column member 21 and the second column member 22. The third column member 23 is positioned closer to the first column member 21 than to the second column member 22. The fourth column member 24 is positioned between the third column member 23 and the second column member 22.

[0049] The fifth column member 25 and the sixth column member 26 are positioned between the second frame member 12 and the fourth frame member 14, connecting the second frame member 12 and the fourth frame member 14. The fifth column member 25 and the sixth column member 26 are fixed to the second frame member 12 and the fourth frame member 14, for example, by screws. As shown in Figure 3, the end of the second frame member 12 facing the first end 11b of the first frame member 11 is designated as the first end 12b, and the end of the fourth frame member 14 facing the first end 13b of the third frame member 13 is designated as the first end 14b. The first end 12b and the first end 14b face each other in the direction of axis B. The end of the second frame member 12 facing the second end 11c of the first frame member 11 is designated as the second end 12c, and the end of the fourth frame member 14 facing the second end 13c of the third frame member 13 is designated as the second end 14c. The second end 12c and the second end 14c face each other in the direction of axis B. As shown in Figures 6 and 7, the fifth column member 25 is positioned closer to the second ends 12c and 14c than to the first ends 12b and 14b. The sixth column member 26 is positioned between the fifth column member 25 and the first ends 12b and 14b. The sixth column member 26 is positioned opposite the fourth column member 24.

[0050] As shown in Figure 7, a shaft member 29 is fixed between the first end 12b of the second frame member 12 and the first end 14b of the fourth frame member 14. The shaft member 29 is positioned along axis B. A through hole is formed in the second column member 22 in the portion between the second frame member 12 and the fourth frame member 14, along axis B, and the shaft member 29 is rotatably inserted into this through hole relative to the second column member 22. When not locked by the locking part 3 described later, the second frame member 12 and the fourth frame member 14 rotate around the shaft member 29 relative to the first frame member 11 and the third frame member 13, so that the gaps between the first ends 11b, 13b and the first ends 12b, 14b open (see arrow E in Figure 6 and Figure 8(c) described later).

[0051] The space enclosed by the first frame member 11, the second frame member 12, the third frame member 13, the fourth frame member, the first column member 21, the second column member 22, the third column member 23, the fourth column member 24, the fifth column member 25, and the sixth column member 26 is the arrangement section 2S where the end portion 310 of the pipe material 300 is placed.

[0052] (Lock section 3) The locking part 3 locks the first ends 11b and 13b of the first frame member 11 and the third frame member 13, and the first ends 12b and 14b of the second frame member 12 and the fourth frame member 14, in a closed state. As shown in Figure 2, the locking part 3 is positioned between the first end 12b of the second frame member 12 and the first end 14b of the fourth frame member 14. As shown in Figure 7, the locking part 3 has a shaft member 31, a rotating member 32, a lever 33, a locking member 34, and a locking pin 35. Figure 8(a) is a cross-sectional view taken along the arrow between F and C in Figure 7, and is a cross-sectional view of the locking part 3. Figure 8(a) shows the state in which the locking part 3 is locked in a closed state between the first ends 11b and 13b and the first ends 12b and 14b.

[0053] The shaft member 31 is fixed between the first end 12b of the second frame member 12 and the first end 14b of the fourth frame member 14. The shaft member 31 is arranged parallel to the shaft B.

[0054] The rotating member 32 is rotatably positioned on the shaft member 31. A through hole is formed in the rotating member 32 along the axis B, and the shaft member 31 is inserted into the through hole. The rotating member 32 rotates about the shaft member 31. The rotating member 32 is positioned between the second frame member 12 and the fourth frame member 14. As shown in Figure 7, the rotating member 32 extends from the shaft member 31 in a direction perpendicular to the axis B, and a gap 32a is formed in the center of the extended end in the direction of axis B. In the rotating member 32, in the direction of axis B, a long hole 32b is formed in the portion of the rotating member 32 that is sandwiched between the gap 32a. The lever 33 is fixed to the rotating member 32. The lever 33 extends radially outward from the rotating member 32 in the radial direction C. The locking member 34 has a connecting portion 36 and a hook portion 37. The connecting portion 36 connects the hook portion 37 to the rotating member 32. The connecting portion 36 is positioned along the axis B. The connecting portion 36 is inserted into the elongated hole 32b. The hook portion 37 extends from the part of the connecting portion 36 located in the gap 32a in a direction perpendicular to the axis B. A hook shape is formed at the tip of the hook portion 37, which engages with the locking pin 35 described above.

[0055] Figure 8(b) shows the state after the lock has been released from the state shown in Figure 8(a). As indicated by arrow G in Figure 8(b), by rotating the lever 33 toward the first ends 11b and 13b, the locking of the locking pin 35 by the hook portion 37 can be released, and the locking pin 35 can be moved outward in direction H. With the locking of the locking pin 35 released by the hook portion 37, the second frame member 12 and the fourth frame member 14 can be rotated around the shaft member 29 relative to the first frame member 11 and the third frame member 13, so that the gap between the first ends 11b and 13b and the first ends 12b and 14b can be opened, as shown in Figure 8(c).

[0056] The locking pin 35 is secured by the locking member 34, and the lever 33 can be locked by rotating it in the opposite direction to arrow G. With the frame section 2 shown in Figure 8(c) open, the pipe material 300 is placed in the placement section 2S, and the frame section 2 is locked, allowing the scraper device 1 to be attached to the pipe material 300 as shown in Figure 4.

[0057] (Laura 4a~4c) Multiple rollers 4a to 4b are capable of contacting the side surface 350 of the pipe material 300 located in the arrangement section 2S. Multiple rollers 4a to 4b are capable of rotating on the side surface 350 by the rotation of the scraper device 1 relative to the pipe material 300. Rollers 4a to 4c rotate around an axis parallel to axis B. Of the multiple rollers 4a to 4c, rollers 4a and 4b are rotatably positioned between the first frame member 11 and the third frame member 13. As shown in Figure 7, roller 4a is positioned between the first column member 21 and the third column member 23 in the circumferential direction D. Roller 4b is positioned between the second column member 22 and the fourth column member 24 in the circumferential direction D. Roller 4c is rotatably positioned between the second frame member 12 and the fourth frame member 14. Roller 4c is positioned between the fifth column member 25 and the sixth column member 26 in the circumferential direction D.

[0058] The arrangement section 2S is the space inside the rollers 4a to 4c. In Figure 4, the pipe material 300, which is arranged inside the rollers 4a to 4c, is shown by a dashed line.

[0059] (End face cutting member 5) The end-face cutting member 5 cuts the end face 320 of the pipe material 300. As shown in Figures 2 and 3, the end-face cutting member 5 is positioned on the surface 13s of the third frame member 13 on the side of the first frame member 11. As shown in Figure 3, the end-face cutting member 5 is positioned on the surface 13s in a portion that does not overlap with the first frame member 11 when viewed from a direction along axis B. An end-face cutting portion 5a is positioned at the tip of the end-face cutting member 5. Although not shown, the end-face cutting portion 5a is positioned to protrude from the surface 13s, and the protruding portion cuts the end face 320 of the pipe material 300.

[0060] (Side blade member 6) The side blade member 6 scrapes the first side portion 330 and the second side portion 340 of the pipe material 300. Figure 9 is a perspective view showing the configuration of the scraper device 1 near the side blade member 6. As shown in Figure 7, the side blade member 6 is positioned between the third column member 23 and the fourth column member 24 in the circumferential direction D. The side blade member 6 is positioned in a recess 13t formed in the surface 13s. The bottom surface of the recess 13t is formed parallel to the surface 13s. The end of the side blade member 6 on the third frame member 13 side fits into the recess 13t.

[0061] The side blade member 6 has a first side blade portion 41, a second side blade portion 42, an inner surface 43, and a mounting portion 44. The first side blade portion 41 cuts the first side portion 330 of the pipe material 300. The second side blade portion 42 cuts the second side portion 340 of the pipe material 300. The inner surface 43 can contact the side surface 350 of the pipe material 300. The mounting portion 44 is attached to the biasing member 7.

[0062] The side blade member 6 is a substantially plate-shaped member. As shown in Figure 9, the side blade member 6 includes a first edge portion 45, a second edge portion 46, and a central portion 47. The first edge portion 45 is the edge portion of the side blade member 6 on the surface 13s side and is formed parallel to the surface 13s. The second edge portion 46 is the portion of the side blade member 6 on the first frame member 11 side and is formed substantially parallel to the surface 13s. The central portion 47 is the portion of the side blade member 6 between the first edge portion 45 and the second edge portion 46. The surface 45a of the first edge portion 45 on the placement portion 2S side and the surface 46a of the second edge portion 46 on the placement portion 2S side are arranged parallel to the central axis B. The inner surface 43 of the central portion 47, which is the surface on the placement portion 2S side, is arranged parallel to the central axis B. The first edge portion 45 protrudes further toward the placement portion 2S side (the side where the pipe material 300 is placed) than the central portion 47. The second edge portion 46 protrudes more towards the placement portion 2S than the central portion 47.

[0063] A first notch 48 is formed extending from the first edge 45 to the central part 47. A second notch 49 is formed extending from the second edge 46 to the central part 47. The first notch 48 and the second notch 49 are arranged side by side in a direction parallel to the central axis B.

[0064] As shown in Figure 9, the mounting portion 44 is the end of the side blade member 6 on the third column member 23 side. The mounting portion 44 is located on the third column member 23 side of the first notch portion 48 and the second notch portion 49.

[0065] As shown in Figure 9, the first side cutting edge 41 is formed at the end of the first edge 45 of the first notch 48 opposite to the mounting portion 44. The edge 48a of the first notch 48 opposite to the mounting portion 44 is formed inclined so that it is positioned towards the mounting portion 44 as it approaches the surface 45a. The portion of the edge 48a that protrudes toward the placement portion 2S side from the inner surface 43 of the central portion 47 forms the first side cutting edge 41.

[0066] As shown in Figure 9, the second side cutting edge 42 is formed at the end of the second edge 46 of the second notch 49 opposite to the mounting portion 44. The edge 49a of the second notch 49 opposite to the mounting portion 44 is formed inclined so that it is positioned towards the mounting portion 44 as it approaches the surface 46a. The portion of the edge 49a that protrudes toward the placement portion 2S side from the inner surface 43 of the central portion 47 forms the second side cutting edge 42.

[0067] Figure 10 is a bottom view of the side blade member 6 as seen from the third frame member 13 side. In this embodiment, the length of the first side blade portion 41 protruding from the surface 45a and the length of the second side blade portion 42 protruding from the surface 46a are the same and are shown as d. Note that the first side blade portion 41 and the second side blade portion 42 overlap in a plan view, so only the first side blade portion 41 is shown in Figure 10. The side surface 350 of the pipe material 300 comes into contact with the inner surface 43, and the side surface 350 of the pipe material 300 is shaved by a step d.

[0068] (Biasing member 7) The biasing member 7 biases the side blade member 6 toward the placement section 2S. The biasing member 7 biases the side blade member 6 toward the central axis B. As shown in Figure 6, the biasing member 7 presses the side blade member 6 against the side of the pipe material 300 placed in the placement section 2S.

[0069] Figure 11 is a plan view showing the vicinity of the biasing member 7. In Figure 11, the first frame member 11 is omitted. The biasing member 7 is formed, for example, by bending a substantially plate-shaped member. The biasing member 7 is a leaf spring. In plan view, the biasing member 7 is an L-shaped member. The biasing member 7 has a first portion 51 and a second portion 52. The first portion 51 and the second portion 52 are plate-shaped. The first portion 51 (an example of the second end) is fixed to the side surface 23a of the third column member 23. The first portion 51 protrudes outward from the third column member 23. The second portion 52 extends from the protruding tip of the first portion 51 towards the mounting portion 44 of the side blade member 6 between the third frame member 13 and the first frame member 11. The side blade member 6 is fixed to the tip portion 52a of the second portion 52 (an example of the first end). The biasing member 7 supports only the mounting portion 44 of the side blade member 6, which consists of the tip portion 50 and the mounting portion 44, both of which are perpendicular to the axis B of the side blade member 6. The biasing member 7 supports the side blade member 6 in a so-called cantilevered manner. The biasing member 7 may also be composed of a flat plate-shaped spring member.

[0070] (Elastic support part 8) The elastic support portion 8 is located on the opposite side from the arrangement portion 2S of the side blade member 6. Figure 12 is a perspective view showing the vicinity of the elastic support portion 8 of the scraper device 1. In Figure 12, the first frame member 11 is omitted. The elastic support portion 8 is fixed to the surface 13s of the third frame member 13. The elastic support portion 8 includes a coil spring 61 and an adjustment mechanism 62. The coil spring 61 elastically supports the back surface 6a of the side blade member 6 on the opposite side from the arrangement portion 2S of the side blade member 6. The back surface 6a is the surface of the side blade member 6 on the opposite side of the biasing direction K of the side blade member 6 by the biasing member 7. The coil spring 61 is positioned so that its central axis is parallel to the surface 13s. The central axis 61c of the coil spring 61 (see Figure 13) is positioned perpendicular to the back surface 6a. The adjustment mechanism 62 adjusts the support force on the side blade member 6 by the coil spring 61 by adjusting the elastic force of the coil spring 61.

[0071] Figure 13(a) is a cross-sectional view of the elastic support portion 8, taken by cutting it through the central axis of the coil spring 61 with a plane parallel to the surface 13s. The adjustment mechanism 62, as shown in Figures 11 and 13(a), includes a base 63, a bolt 64 (an example of a support member), a nut 65, and a fixing member 66. The base 63 is positioned on the surface 13s. The base 63 is fixed to the surface 13s. The bolt 64 is fixed to the base 63. As shown in Figure 13(a), a through hole 63a is formed in the base 63, extending from the outside toward the positioning portion 2S. The through hole 63a is formed parallel to the surface 13s.

[0072] The bolt 64 is inserted into the through hole 63a from the outside. The bolt 64 has a head 64a and a shaft portion 64b. The head 64a is positioned outside the base 63 (on the opposite side of the mounting portion 2S). The shaft portion 64b is inserted into the through hole 63a. The shaft portion 64b protrudes from the base 63 toward the back surface 6a. A male thread shape is formed on the outer surface of the shaft portion 64b.

[0073] The nut 65 is positioned around the shaft portion 64b of the bolt 64. The nut 65 is screwed onto the shaft portion 64b of the bolt 64. The nut 65 is positioned on the back side 6a (positioning portion 2S side) of the base 63. The bolt 64 is fixed to the base 63 by sandwiching the base 63 between the head 64a of the bolt 64 and the nut 65.

[0074] The fixing member 66 is fixed to the end of the coil spring 61. The coil spring 61 is positioned between the back surface 6a of the side blade member 6 and the base 63. The coil spring 61 has a tip 61a positioned on the back surface 6a side and a base end 61b positioned on the base 63 side. The tip 61a of the coil spring 61 is in contact with the back surface 6a of the side blade member 6. The fixing member 66 is fixed to the base end 61b. The fixing member 66 is disc-shaped. As shown in Figure 13(a), the fixing member 66 has a through hole 66a formed in the center of its disc shape. The through hole 66a is positioned coaxially with the central axis 61c of the coil spring 61. A female screw shape is formed on the inner circumferential surface of the through hole 66a. The shaft portion 64b of the bolt 64 is inserted into the through hole 66a of the fixing member 66. The fixing member 66 and the shaft portion 64b are screwed together.

[0075] By rotating the fixing member 66 relative to the shaft portion 64b, the fixing member 66 can be moved along the shaft portion 64b in a direction toward the back surface 6a and in a direction toward the back surface 6a. Figure 13(b) is a plan cross-sectional view of the elastic support portion 8 when the fixing member 66 is moved toward the back surface 6a (direction of arrow M1). By moving the fixing member 66 in the direction of arrow M1, the coil spring 61 also moves toward the back surface 6a side along with the fixing member 66, increasing the elastic force of the coil spring 61 and increasing the support force on the back surface 6a. Figure 13(c) is a plan cross-sectional view of the elastic support portion 8 when the fixing member 66 is moved toward the back surface 6a (direction of arrow M2). By moving the fixing member 66 in the direction of arrow M2, the coil spring 61 also moves toward the base 63 side along with the fixing member 66, decreasing the elastic force of the coil spring 61 and decreasing the support force on the back surface 6a.

[0076] Figure 14(a) is a front view of the side blade member 6 as seen from the positioning section S2 side. As shown in Figure 14(a), the central part 43a in the width direction of the side blade member 6 is elastically supported by a coil spring 61. The width direction of the side blade member 6 is along the axis B.

[0077] Furthermore, not limited to the position shown in Figure 14(a), as shown in Figure 14(b), the portion 43b (an example of the portion on the contact surface side) on the surface 13s side of the central portion 43a in the width direction of the side blade member 6 may also be elastically supported by the coil spring 61. In Figures 14(a) and 14(b), the surface 12s is shown by a dashed line.

[0078] (Gripping part 9) The gripping portion 9 is provided for the operator to grip and rotate the scraper device 1 relative to the pipe material 300. As shown in Figure 6, the gripping portion 9 protrudes radially outward from the fourth column member 24. The gripping portion 9 also protrudes radially outward from the sixth column member 26. The pair of gripping portions 9 are arranged opposite each other with axis B in between.

[0079] (Scraping process) As shown in Figure 8(c), the locking mechanism 3 is released, and with the gaps between the first end 11b of the first frame member 11 and the first end 13b of the third frame member 13, and the first end 12b of the second frame member 12 and the first end 14b of the fourth frame member 14, the end 310 of the pipe material 300 is placed in the placement section S2.

[0080] Next, as shown in Figure 8(b), the gap between the first ends 11b, 13b and the first ends 12b, 14b is closed, the locking pin 35 is locked by the locking member 34, and by rotating the lever 33, the lock is engaged as shown in Figure 8(a). As a result, as shown in Figures 4 and 6, the end 310 of the pipe material 300 is surrounded by rollers 4a to 4c and brought into contact with the side blade member 6.

[0081] Next, the operator grips the pair of gripping parts 9 and rotates the scraper device 1 while the end face 320 of the pipe material 300 is in contact with the surfaces 13s and 14s. This allows the scraper to cut two locations on the side surface 350 and the end face 320 of the pipe material 300.

[0082] (Overview of Piping Structure 500) Next, we will describe the piping structure 500 that is created by scraping the pipe material 300 using the scraper device 1 described above and then fusing it through the electrofusion joint 100.

[0083] Figure 15 shows an electrofusion joint 100 and two pipes 300 connected by the electrofusion joint 100 in an embodiment of the present disclosure. Figure 12 can be considered an exploded view of the piping structure 500. The piping structure 500 includes, for example, the electrofusion joint 100 and two pipes 300.

[0084] The pipe 300 has a circular cross-sectional channel 300f extending inside. The electrofusion joint 100 has a circular cross-sectional channel 100f extending inside. When the two pipes 300 are connected by the electrofusion joint 100, the axes of the channels in the two pipes 300 and the electrofusion joint 100 are aligned on the same straight line.

[0085] One pipe 300 is inserted into one end of the electrofusion joint 100, and the other pipe 300 is inserted into the other end of the electrofusion joint 100. Then, by heating the heating wire inside the electrofusion joint 100, the two pipes 300 can be connected via the electrofusion joint 100, as shown in Figure 16. Here, since the second side portion 340 is located on the outside of the electrofusion joint 100, the worker can see the second side portion 340. This allows the worker to determine whether or not the pipe 300 has been scraped.

[0086] As described above, even if the pressing force of the side cutting member 6 against the end 310 of the pipe material 300 by the biasing member 7 changes due to deformation of the pipe material 300, the elastic support part 8 allows the side cutting member 6 to follow the side surface 350 of the end 310. Therefore, variations in cutting thickness can be reduced, and stable cutting can be achieved.

[0087] <Other Embodiments> Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the invention.

[0088] In the above embodiment, an elastic force is applied to the side blade member 6 by a coil spring 61, but it is not limited to a coil spring 61; a leaf spring or the like may be used, as long as it can apply an elastic force to the side blade member 6.

[0089] In the scraper device 1 of the above embodiment, an end-face cutting member 5 is provided, but if only the side surface 350 of the pipe material 300 is to be cut, the end-face cutting member 5 may not be provided.

[0090] In the scraper device 1 of the above embodiment, the second side portion 340 is scraped simultaneously with the first side portion 330 in order to be used as an indicator for evaluating fusion bonding. However, if it is not used as an indicator, the second side cutting edge portion 42 does not need to be provided.

[0091] In the above embodiment, the end 310 of the pipe material 300 is scraped, but it is not limited to pipe material; it may also be a joint member, as long as it has a tubular end.

[0092] In the scraper device 1 of the above embodiment, three rollers 4a to 4c are provided, but the number of rollers may be four or more, or two or fewer. [Explanation of symbols]

[0093] 1: Scraper device 6: Side blade member 6a: Back 7: Biasing member 8: Elastic support part 9: Grip part 300: Tube material 300f: Flow channel 310: End

Claims

1. A scraper device for cutting the side surface of the end of a workpiece member having a tubular end, A side cutting member capable of cutting the side surface when in contact with the side surface of the end, A biasing member connected to the side blade member and in contact with the side surface of the end, biasing the side blade member toward the side surface of the end, The side blade member is provided with an elastic support portion that elastically supports the side blade member from the back surface, which is the surface opposite to the biasing direction of the biasing member, Scraper device.

2. The elastic support portion has an adjustment mechanism that can adjust the elastic force supporting the side blade member. The scraper device according to claim 1.

3. The aforementioned elastic support portion further comprises a coil spring, The adjustment mechanism is, A fixing member fixed to the coil spring, The side blade member has a support member that extends toward the rear surface and supports the fixing member, The fixing member is movable along the support member. The scraper device according to claim 2.

4. The elastic support portion supports the central portion in the width direction of the side blade member, The width direction is the direction along the axis of the end when it is in contact with the side blade member. The scraper device according to claim 1.

5. The end surface of the end further comprises a contact surface that the end face of the end contacts when the side surface of the end is in contact with the side blade member, The elastic support portion supports the portion of the side blade member that is closer to the contact surface than the central portion in the width direction. The width direction is the direction along the axis of the end when it is in contact with the side blade member. The scraper device according to claim 1.

6. The side blade member has multiple blade portions arranged at its tip in the width direction of the side blade member, The width direction is the direction along the axis of the end when it is in contact with the side blade member. The scraper device according to claim 1.

7. The frame portion further comprises an arrangement portion in which the end of the workpiece member is positioned such that the side cutting member abuts against the side surface, The biasing member and the elastic support are fixed to the frame. The scraper device according to claim 1.

8. The biasing member is a leaf spring, One first end of the biasing member is connected to the end of the side blade member, and the other second end of the biasing member is fixed to the frame portion. The scraper device according to claim 7.

9. The frame portion has a contact surface to which the end face of the end contacts when the side surface of the end contacts the side blade member. The system further comprises an end-face cutting member positioned on the contact surface and capable of cutting the end face by contacting the end face of the end, The scraper device according to claim 7.

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