Sleeve holding jig and press-fitting device using same

Abstract

To provide a technique for holding a sleeve to be press-fitted to a resin pipe, while preventing foreign matters from adhering to an inner peripheral surface of the sleeve.SOLUTION: A sleeve holding jig 6 is used for press-fitting a sleeve 106 to an interior side of an end 102a of a resin pipe 102 in one axial direction. The sleeve holding jig 6 has a sleeve holder 34 comprising: a cylindrical part 41 which has an inner peripheral surface 41a fitted to an outer peripheral surface 106b2 of the sleeve 106, and is disposed concentrically with a central axis of the resin pipe 102; and an inner wall surface 42a which is provided on the other side in an axial direction of the cylindrical part 41, and abuts on an end surface on the other side in an axial direction of the sleeve 106.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a sleeve holding jig and a press-fitting device using the same. [Background technology]

[0002] 2. Description of the Related Art Conventionally, resin pipes for passing fluids such as pure water and chemical solutions, and resin pipe fittings for connecting resin pipes, have been used in semiconductor manufacturing equipment, liquid crystal manufacturing equipment, and the like. The above-mentioned pipe fitting comprises a sleeve that is press-fitted into the inside of the end of the plastic pipe, a cylindrical fitting body that is positioned on the outside of the end of the plastic pipe, and a union nut that screws into a male thread provided on the outer periphery of the fitting body. By tightening the union nut, the end of the plastic pipe is clamped between the sleeve and the joint body, thereby connecting the plastic pipe to the pipe joint.

[0003] For example, Patent Document 1 discloses a press-fitting jig for press-fitting the above-mentioned sleeve into the inside of the end of a resin pipe. The press-fitting jig has a shaft-shaped sleeve holder that holds the sleeve on its outer circumferential surface. The sleeve holder is inserted into the inner circumferential side of the sleeve to hold the sleeve. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-1277 A Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, the level of cleanliness required in semiconductor manufacturing processes has increased, and there has also been an increasing demand for suppressing adhesion of foreign matter to resin pipes and pipe joints used in semiconductor manufacturing equipment, liquid crystal manufacturing equipment, and the like. In particular, a higher degree of cleanliness is required for the inner peripheral surface of the sleeve with which the fluid comes into direct contact. However, in the above conventional example, the sleeve is held by a sleeve holder inserted into the inner side of the sleeve, which means that the sleeve holder comes into contact with the inner surface of the sleeve, which could cause foreign matter to adhere to the inner surface of the sleeve.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a technology that can hold a sleeve pressed into a plastic pipe while preventing foreign matter from adhering to the inner surface of the sleeve. [Means for solving the problem]

[0007] (1) A sleeve holding jig according to one embodiment is a sleeve holding jig that holds a sleeve that is pressed into the inside of the end of a plastic pipe in one axial direction, and is equipped with a cylindrical portion having an inner surface that fits into the outer peripheral surface of the end of the sleeve on the other axial side and is arranged coaxially with the central axis of the plastic pipe, and an inner wall surface provided on the other axial side of the cylindrical portion and abutting the end face of the sleeve on the other axial side.

[0008] According to the above configuration, when the sleeve is press-fitted into the inside of the end of the plastic pipe, the sleeve is pressed in one axial direction by a pressing force applied via the inner wall surface that abuts against the end face on the other axial side of the sleeve. Also, the sleeve is held in the radial direction by the inner circumferential surface that fits into the outer circumferential surface of the end of the sleeve. Therefore, the sleeve holder can press the sleeve in one axial direction while holding it in the radial direction without contacting the inner circumferential surface of the sleeve. As a result, the sleeve pressed into the plastic pipe can be held while preventing foreign matter from adhering to the inner circumferential surface of the sleeve.

[0009] (2) In the above sleeve holding jig, it is preferable that the cylindrical portion is provided adjacent to one axial side of the inner circumferential surface and has an inner circumferential tapered surface that increases in diameter toward the one axial side. In this case, when the sleeve is inserted into and held in the cylindrical portion of the sleeve holder, even if there is some dimensional error in the sleeve, the sleeve can be smoothly inserted into the cylindrical portion.

[0010] (3) When the sleeve holding jig comprises a sleeve holder having the cylindrical portion and the inner wall surface, and a jig body having a mounting surface on one axial side to which the sleeve holder is attached, it is preferable that the sleeve holder is removably attached to the mounting surface. In this case, the sleeve holder can be replaced with one having a cylindrical portion of a different size according to the diameter of the sleeve.

[0011] (4) The sleeve holding jig may further include a flare member having a protrusion that is inserted into the end of the plastic tube to expand the diameter of the end, and a moving mechanism that moves the flare member between a first position between the end of the plastic tube and the sleeve, where the protrusion faces the end of the plastic tube with the central axis of the protrusion and the central axis of the cylindrical portion positioned on the same straight line, and a second position where the flare member is out of between the plastic tube and the sleeve. In this case, after the sleeve is held by the sleeve holder, the flare member is moved to a first position and the protrusion of the flare member is pressed against the end of the plastic pipe, thereby performing flaring to expand the diameter of the end of the plastic pipe. After that, the flare member is moved to a second position, removed from between the plastic pipe and the sleeve, and the sleeve is pressed into the expanded plastic pipe by abutting it against the expanded plastic pipe. As a result, it is possible to perform flaring and press-fitting of the sleeve into the plastic pipe without contacting the flare member or the like with the sleeve held by the sleeve holder.

[0012] (5) It is preferable that the moving mechanism includes an arm member extending from the jig body, having the flare member attached to its tip, and being rotatable around a rotation axis perpendicular to the axial direction. In this case, the moving mechanism can be configured with a simple structure.

[0013] (6) Furthermore, it is preferable that the rotation axis is offset toward the second position with respect to the central axis of the cylindrical portion. In this case, the trajectory of the flare member when it is moved between the first position and the second position can be made farther away from the cylindrical portion and the sleeve than the trajectory of the flare member when the rotation axis intersects with the central axis of the cylindrical portion. As a result, the flare member at the first position can be brought closer to the cylindrical portion and the sleeve while avoiding contact between the sleeve and the flare member, and the sleeve holding jig can be made more compact.

[0014] (7) Also, a press-fitting device according to an embodiment is a press-fitting device for press-fitting a sleeve into an inside end of a plastic pipe in one axial direction, and includes a pipe holding part for holding the plastic pipe, a sleeve holding jig for holding the sleeve, a press-fitting rod to which the sleeve holding jig is attached at its tip on one axial side, and a moving mechanism for moving the press-fitting rod along the axial direction. In this case, the sleeve holding jig is any one of the sleeve holding jigs described above in (1) to (6). Effect of the Invention

[0015] According to the present disclosure, a sleeve that is press-fitted into a plastic pipe can be held while preventing foreign matter from adhering to the inner circumferential surface of the sleeve. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of a press-fitting device according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view of the press-fitting device. [Diagram 3] FIG. 3 is a cross-sectional view of the sleeve holding jig. [Figure 4] FIG. 4 is a perspective view showing the appearance of the sleeve holding jig. [Diagram 5] FIG. 5 is a perspective view showing the appearance of the sleeve holding jig when the flare member is located at a first position. [Figure 6] FIG. 6 is a diagram showing a cross section along a plane parallel to the up-down direction and including the rotation axis in FIG. [Figure 7]FIG. 7 is a diagram showing a sleeve press-fitting process using a press-fitting device having a sleeve holding jig. [Figure 8] FIG. 8 is a diagram showing a sleeve press-fitting process using a press-fitting device having a sleeve holding jig. [Figure 9] FIG. 9 is a cross-sectional view of a plastic pipe joint using a sleeve that is press-fitted into a plastic pipe by the press-fitting device according to this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, preferred embodiments will be described with reference to the drawings. [Regarding plastic pipe fittings] FIG. 9 is a cross-sectional view of a plastic pipe joint using a sleeve that is press-fitted into a plastic pipe by the press-fitting device according to this embodiment. 9, a plastic pipe fitting 100 is attached to an end 102a of a plastic pipe 102 through which a fluid flows. The plastic pipe fitting 100 has a function of connecting the end 102a of the plastic pipe 102 to another plastic pipe or a predetermined fluid device (not shown).

[0018] The resin pipe 102 is a cylindrical tubular member made of a fluororesin such as PFA (tetrafluoroethylene-perfluoroalkylvinylether polymer) or PTFE (polytetrafluoroethylene). The plastic pipe joint 100 comprises a joint body 104, a sleeve 106, and a union nut 108. The joint body 104 is a cylindrical member made of a fluororesin such as PFA or PTFE, and has a cylindrical body portion 104a and a cylindrical portion 104b provided at the tip of the body portion 104a.

[0019] An end portion 102a of the resin pipe 102 is inserted into the inner peripheral side of the cylindrical portion 104b. Further, a male thread 104b1 into which a union nut 108 is screwed is provided on the outer peripheral surface of the cylindrical portion 104b. The sleeve 106 is a cylindrical member made of a fluororesin such as PFA or PTFE, and has a press-fit portion 106a press-fitted into the inside of the end portion 102a of the plastic pipe 102, and a fitting portion 106b that fits into the inner circumferential surface of the joint body 104. The press-fit portion 106a is provided with a bulging portion 106a1 that bulges outward in the radial direction. The outer circumferential surface of the plastic pipe 102 bulges outward in the radial direction in response to the bulging portion 106a1. An inner peripheral end 104b2 of the cylindrical portion 104b is in contact with an inclined portion 102b that bulges and inclines on the outer peripheral surface of the resin pipe 102.

[0020] The union nut 108 is a cylindrical member made of a fluororesin such as PFA or PTFE, and has an internal thread 108a on its inner circumferential surface that screws into the external thread 104b1. When the union nut 108 is tightened, a force is generated that moves the joint body 104 and the plastic pipe 102 relative to each other in the axial direction, and the plastic pipe 102 is clamped between the inner circumferential end 104b2 of the cylindrical portion 104b and the bulging portion 106a1 of the sleeve 106. This prevents leakage of fluid between the plastic pipe 102 and the joint body 104. In this manner, the plastic pipe joint 100 is attached to the end 102 a of the plastic pipe 102 .

[0021] [About the press-fitting device] 2 is a cross-sectional view of the press-fitting device 1 according to the embodiment. The press-fitting device 1 is a device for press-fitting the above-mentioned sleeve 106 into the inside of the end portion 102a of the resin pipe 102. The press-fitting device 1 includes a device body 2, a pipe holding section 4 that holds a resin pipe 102, and a sleeve holding jig 6 that holds a sleeve 106.

[0022] The pipe holding part 4 is provided on the device body 2. The pipe holding part 4 holds the resin pipe 102 so that the end part 102a faces the device body 2 side. The device main body 2 includes a machine body 10, a press-fit rod 12, a moving mechanism 14 for moving the press-fit rod 12, and a grip 16. The machine body 10 is a member formed from metal, resin, or the like, and has the various components that constitute the device main body 2 provided thereon. The grip 16 is provided on the machine body 10 and is held by a user who uses the press-fitting device 1 . The press-fit rod 12 is a rod-shaped member provided so as to penetrate the machine body 10, and is held by the machine body 10. The central axis of the press-fit rod 12 coincides with the central axis C of the resin pipe 102. In other words, the central axis C is also the central axis of the press-fit rod 12. The press-fit rod 12 and the resin pipe 102 are arranged side by side on the central axis C. In addition, the press-fit rod 12 is held by the machine body 10 so as to be movable along the central axis C.

[0023] In the following description, the direction parallel to the central axis C of the resin pipe 102 is defined as the axial direction, and in the press-fitting device 1, the pipe holding part 4 side (left side of the paper) is defined as one axial direction, and the device main body 2 side (right side of the paper) is defined as the other axial direction. In addition, in the press-fitting device 1, the side where the grip 16 is provided is defined as the downward direction (lower side of the paper), and the opposite side is defined as the upward direction. The direction perpendicular to the axial direction and the up-down direction is defined as the left-right direction.

[0024] The sleeve holding jig 6 is attached to the tip 12a of the press-fitting rod 12. The press-fitting device 1 advances the tip 12a of the press-fitting rod 12 to which the sleeve holding jig 6 is attached, and presses the sleeve 106 into the end 102a of the resin pipe 102.

[0025] The press-fit rod 12 has a hole 12b having a rectangular cross section penetrating therethrough in the vertical direction. A roller 18 is provided in the hole 12b. The roller 18 is provided so as to be rotatable about an axis 20 parallel to the left-right direction. The hole 12b and the roller 18 are provided so as to be located in the internal space 10c of the machine body 10. Further, the press-fit rod 12 is biased toward the other axial side by a spring (not shown). 1 and 2 show a case where the press-fit rod 12 is located at a position on the other axial side within the movement range of the press-fit rod 12.

[0026] The machine body 10 of the device main body 2 is provided with a first hole 10a and a second hole 10b through which the press-fit rod 12 is inserted. The first hole 10a opens to one axial side of the machine body 10 and communicates between the outside of the machine body 10 and the internal space 10c. The second hole 10b opens to the other axial side of the machine body 10 and communicates between the outside of the machine body 10 and the internal space 10c. Both holes 10a and 10b are provided with sleeves 22 that support the press-fit rod 12 movably in the axial direction.

[0027] The moving mechanism 14 includes a lever 24 and a support shaft 26 that supports the lever 24 so that it can rotate freely. The lever 24 is a rod-shaped member that protrudes from the internal space 10c of the machine body 10 to the outside from below the machine body 10. The lever 24 has an operating part 24a that protrudes from the internal space 10c of the machine body 10 to the outside from below the machine body 10, and a lever tip part 24b that contacts the roller 18. The support shaft 26 is a cylindrical member that is provided in the internal space 10c of the machine body 10 and extends in the left-right direction, and is inserted into a hole 24c provided in the lever 24. The lever 24 is rotatable about a support shaft 26. The lever 24 is biased by a spring (not shown) so that a lever tip 24b always comes into contact with the roller 18. When the lever 24 rotates, the lever tip 24b presses the press-fit rod 12 in one axial direction via the roller 18, moving the press-fit rod 12 in one axial direction. The lever 24 is rotated by the user. For example, when the user operates the lever 24 to rotate it to the position shown by the two-dot chain line, the roller 18 moves to the position shown by the two-dot chain line. As a result, the press-fit rod 12 advances along the axial direction in one direction. When the user stops operating the lever 24, the press-fit rod 12 retreats to the other axial side due to the biasing force of the spring.

[0028] The pipe holding portion 4 includes a rail 28 and a clamp 30. The rail 28 is fixed to the machine body 10 and extends parallel to the central axis C from the machine body 10 toward one side in the axial direction. The clamp 30 has a lower block 30a fixed to the rail 28, an upper block 30b that holds the resin pipe 102 by sandwiching it between the lower block 30a and the upper block 30b, and a locking portion 30c that locks the lower block 30a and the upper block 30b together. The lower block 30a is fixed to the rail 28 by a bolt 31 so as to be movable in the axial direction. The upper block 30b is provided on the upper surface of the lower block 30a and is rotatable about a rotation axis provided at one end of the lower block 30a in the left-right direction. The lower surface of the upper block 30b is provided with a holding groove 30b1 for holding the resin pipe 102. The upper surface of the lower block 30a is provided with a holding groove 30a1 for holding the resin pipe 102. The clamp 30 holds the resin pipe 102 by sandwiching it between the holding grooves 30a1, 30b1 with the lower surface of the upper block 30b abutting against the upper surface of the lower block 30a.

[0029] [Sleeve holding jig] Fig. 3 is a cross-sectional view of the sleeve holding jig 6, and Fig. 4 is a perspective view showing the appearance of the sleeve holding jig 6. Fig. 3 is a cross-sectional view in the vertical direction including the central axis C. Fig. 3 also shows a part of the press-fit rod 12 to which the sleeve holding jig 6 is attached. As shown in FIGS. 3 and 4, the sleeve holding jig 6 has a sleeve holder 34, a jig body 36, a flare member 38, and a pair of arms 40.

[0030] 3, the sleeve holding jig 6 is attached to a mounting hole 13 that opens into an end face 12a1 of the tip 12a of the press-fit rod 12. The central axis of the mounting hole 13 coincides with the central axis C. A threaded hole 12a2 communicating with the mounting hole 13 is provided on the outer circumferential surface of the tip 12a of the press-fit rod 12. A set screw 15 for fixing the sleeve holding jig 6 is screwed into the threaded hole 12a2.

[0031] The jig body 36 is a block-shaped member made of stainless steel such as SUS304. The jig body 36 has a mounting shaft 36a extending to the other axial side. The mounting shaft 36a is inserted into the mounting hole 13. Therefore, the central axis of the mounting shaft 36a coincides with the central axis C. The mounting shaft 36a has a fixing hole 36a1. The set screw 15 is inserted into the fixing hole 36a1. This allows the sleeve holding jig 6 to be removably fixed to the press-fit rod 12 in the axial direction.

[0032] The jig body 36 has a mounting surface 36b on one axial side to which the sleeve holder 34 is attached. The mounting surface 36b is a flat surface perpendicular to the central axis C. A screw hole 36b1 is provided in the mounting surface 36b. The screw hole 36b1 is recessed from the mounting surface 36b toward the other axial side, and the central axis of the screw hole 36b1 coincides with the central axis C. An internal thread is provided on the inner peripheral surface of the screw hole 36b1.

[0033] The sleeve holder is a member that holds the sleeve 106, and is made of a resin such as PEEK (polyether ether ketone) or PTFE. The sleeve holder has a cylindrical portion 41 and a wall portion . The central axis of the cylindrical portion 41 coincides with the central axis C. Therefore, the central axis of the inner circumferential surface 41a of the cylindrical portion 41 also coincides with the central axis C. In other words, the central axis C is also the central axis of the cylindrical portion 41. The inner diameter of the inner circumferential surface 41a is dimensioned to provide an interference fit with the fitting portion 106b of the sleeve 106. As a result, when the sleeve 106 is inserted into the cylindrical portion 41, the inner circumferential surface 41a of the cylindrical portion 41 fits into the outer circumferential surface 106b2 of the fitting portion 106b of the sleeve 106 (the outer circumferential surface of the end portion on the other axial side of the sleeve 106) to hold the sleeve 106. The cylindrical portion 41 has an inner peripheral tapered surface 41b on the inner peripheral side of the open end. The inner peripheral tapered surface 41b is provided adjacent to one axial side of the inner peripheral surface 41a. The inner peripheral tapered surface 41b increases in diameter toward one axial side.

[0034] The wall portion 42 is provided so as to close the opening on the other axial side of the cylindrical portion 41 . Therefore, when the sleeve 106 is inserted into the cylindrical portion 41, an end surface 106b1 of the fitting portion 106b of the sleeve 106 comes into contact with the inner wall surface 42a of the wall portion 42. The inner wall surface 42a is a surface of the wall portion 42 facing in one axial direction.

[0035] An external thread portion 43 is provided on an outer surface 42b of the wall portion 42. The outer surface 42b is a surface of the wall portion 42 facing in the other axial direction. The male thread portion 43 extends from the outer surface 42b to the other axial direction side. A male screw is provided on the outer periphery of the male screw portion 43. The male screw portion 43 is screwed into the screw hole 36b1 of the jig body 36. The sleeve holder 34 is removably attached to the jig body 36 by screwing the male threaded portion 43 into the screw hole 36b1. Additionally, the outer surface 42b of the wall portion 42 and the mounting surface 36b of the jig body 36 abut against each other. In this way, the sleeve holder 34 is removably attached to the jig body 36, so that the jig body 36 can be left attached to the press-in rod 12 and replaced with a sleeve holder 34 having a cylindrical portion 41 of a different size depending on the diameter of the sleeve 106.

[0036] As shown in FIG. 4, the pair of arms 40 are provided on both the left and right side surfaces 36c of the jig body 36. The pair of arms 40 are rectangular columnar members formed from resin such as PEEK, PTFE, etc. The pair of arms 40 extend from the jig body 36 and are provided rotatably around a rotation axis R that is perpendicular to the axial direction and parallel to the left-right direction.

[0037] The flare member 38 is provided at the tips 40c of the pair of arms 40. The flare member 38 connects the tips 40c of the pair of arms 40 to each other. The pair of arms 40 rotate to move the flare member 38 between a first position and a second position. In other words, the pair of arms 40 constitute a moving mechanism 45 that moves the flare member 38 between the first position and the second position.

[0038] The second position is a position above the jig body 36 and the sleeve holder 34. 3 and 4, the flare member 38 is shown in the second position. The first position is a position on one side of the jig body 36 and the sleeve holder 34 in the axial direction. FIG. 5 is a perspective view showing the appearance of sleeve holding jig 6 when flare member 38 is located at the first position.

[0039] The flare member 38 is a plate-like member made of PEEK, PTFE, or the like, and is a member used for flaring by being inserted into the end portion 102a of the resin tube 102 to expand the diameter of the end portion 102a. Recesses 38a1 into which tips 40c of the pair of arms 40 are inserted are provided at both left and right ends of an inner surface 38a of the flare member 38. The inner surface 38a is the surface of the flare member 38 that faces the jig body 36 side.

[0040] The flare member 38 is fixed to the tips 40c of the pair of arms 40 by a pair of flat head screws 44. The pair of flat head screws 44 are screwed from both left and right ends of the outer surface 38b of the flare member 38 toward the tips 40c of the pair of arms 40. The outer surface 38b is the surface opposite the inner surface 38a of the flare member 38. The heads of the pair of flat head screws 44 are flush with the outer surface 38b.

[0041] A protrusion 39 used for flaring is provided on the outer surface 38b of the flare member 38. The protrusion 39 protrudes in a truncated cone shape relative to the outer surface 38b. The central axis S of the protrusion 39 is aligned in a direction perpendicular to the outer surface 38b. During flaring, the tapered surface 39a of the projection 39 comes into contact with the inside of the end portion 102a of the resin pipe 102, expanding the diameter of the end portion 102a of the resin pipe 102.

[0042] In this embodiment, since flat head screws 44 are used to attach flare member 38 to the pair of arms 40, only protrusions 39 protrude from outer surface 38b of flare member 38. Therefore, when the sleeve 106 is press-fitted into the plastic pipe 102, the portions other than the projections 39 can be prevented from contacting the members (for example, the union nut 108 (FIG. 9)) on the plastic pipe 102 side.

[0043] 5, when the flare member 38 is located at the first position, the central axis S of the protrusion 39 coincides with the central axis C (the central axis of the cylindrical portion 41). In other words, the central axis S of the protrusion 39 and the central axis of the cylindrical portion 41 are located on the same straight line. In the first position, the outer surface 38b of the flare member 38 faces the cylindrical portion 41. In addition, the protrusion 39 of the flare member 38 in the first position faces the end portion 102a of the plastic pipe 102 held by the clamp 30.

[0044] 3 and 4, the flare member 38 located in the second position is deviated from the central axis C and from one axial side of the cylindrical portion 41. As a result, the cylindrical portion 41 and the sleeve 106 held by the cylindrical portion 41 are not blocked by the flare member 38 and face the end portion 102a of the plastic pipe 102 located on one axial side.

[0045] The pair of arms 40 each have a rectangular prism-shaped main body 40a and a protruding portion 40b. The protruding portion 40b is provided at an end of the main body 40a on the longitudinal jig main body 36 side. The protruding portion 40b protrudes from one side surface 40a1 of the main body 40a. The one side surface 40a1 is a side surface of the main body 40a that faces upward when the flare member 38 is in the first position.

[0046] As shown in FIG. 5, when the flare member 38 is in the first position, the longitudinal direction of the main body portion 40a of each of the pair of arms 40 is substantially parallel to the central axis C. At this time, the base end surface 40a2 of the main body portion 40a and the front surface 48a of the stopper 48 provided on the side surface 36c of the jig main body 36 come into contact with each other. The stoppers 48 are members that protrude from both the left and right side surfaces 36c of the jig body 36 and come into contact with the pair of arms 40 to limit the range of rotation of the pair of arms 40.

[0047] This stopper 48 can prevent the pair of arms 40 from rotating further downward and the position of the flare member 38 from moving downward beyond the first position. Furthermore, when the pair of arms 40 are rotated so as to move the flare member 38 from the second position toward the first position, the pair of arms 40 come into contact with the stoppers 48, thereby restricting the rotation. Therefore, the flare member 38 can be placed in the first position without any particular positioning.

[0048] Further, the front surface 48a of the stopper 48 is provided so as to be substantially parallel to a plane perpendicular to the central axis C. The base end surface 40a2 of the main body portion 40a is provided so as to be substantially parallel to a plane perpendicular to the central axis C when the flare member 38 is in the first position. Therefore, as described below, when the flare member 38 is placed in the first position, the protrusion 39 of the flare member 38 is abutted against the end 102a of the plastic tube 102, and the flare member 38 is pressed to one axial side to perform the flaring process, the pressing force applied from the press-in rod 12 to press the flare member 38 to one axial side can be reliably applied to the flare member 38 via the jig body 36 and the arm 40.

[0049] 4, when flare member 38 is in the second position, the rotational position of main body portion 40a of each of the pair of arms 40 is a position rotated upward by 90 degrees or more from the rotational position when flare member 38 is in the first position. Therefore, when flare member 38 is in the second position, the axial position of flare member 38 is on the other axial side of rotation axis R.

[0050] When the flare member 38 is in the second position, the tip surfaces 40b1 of the protruding portions 40b of the pair of arms 40 come into contact with the upper surface 48b of the stopper 48. This prevents the pair of arms 40 from rotating further and the position of the flare member 38 from moving downward below the second position. Furthermore, when flare member 38 is in the second position, main body 40a is in a rotated position rotated upward by 90 degrees or more from the rotated position when flare member 38 is in the first position, so that unless the user actively rotates pair of arms 40 toward the first position, pair of arms 40 will not rotate and flare member 38 will be maintained in the second position. This allows the user to rotate pair of arms 40 by his / her own operation and place flare member 38 in either the first position or the second position.

[0051] The pair of arms 40 are attached to the jig body 36 by a pair of hinge pins 50 . FIG. 6 is a diagram showing a cross section along a plane parallel to the up-down direction and including the rotation axis R in FIG. Each of the pair of hinge pins 50 has a head portion 50a, a large diameter portion 50b, and a small diameter portion 50c. The hinge pin 50 also has a step portion 50d between the large diameter portion 50b and the small diameter portion 50c.

[0052] The hinge pin 50 is inserted through a hinge hole 40b2 provided in the protruding portion 40b of the arm 40, and is screwed into a female thread provided on the inner periphery of the through hole 36d of the jig body 36. The small diameter portion 50c has an outer circumferential surface provided with a male thread that screws into the female thread of the through hole 36d. The outer circumferential surface of the large diameter portion 50b and the inner circumferential surface of the hinge hole 40b2 are slidable against each other. This allows the arm 40 to rotate about the central axis of the hinge pin 50. The fit between the outer diameter of the large diameter portion 50b and the inner diameter of the hinge hole 40b2 is set to a value that allows the large diameter portion 50b and the hinge hole 40b2 to slide against each other.

[0053] The hinge pin 50 is fixed to the jig body 36 with the stepped portion 50d abutting against the side surface 36c of the jig body 36. Thus, the arm 40 is attached between the head portion 50a of the hinge pin 50 and the jig body 36 so as to be rotatable. The central axis of the through hole 36d and the central axis of the hinge pin 50 coincide with the rotation axis R. Therefore, the arm 40 is rotatable around the rotation axis R. In addition, the rotation axis R is offset upward from the central axis C (toward the second position).

[0054] [About pressing the sleeve] 7 and 8 are diagrams illustrating a press-fitting process of the sleeve 106 using the press-fitting device 1. FIG. When using the pressing device 1 equipped with the sleeve holding jig 6 to press a sleeve 106 into a plastic pipe 102, as shown in FIG. 7(a), the user first holds the plastic pipe 102 in the clamp 30, then moves the flare member 38 to the second position, inserts the sleeve 106 into the cylindrical portion 41 of the sleeve holder 34, and holds the sleeve 106 in the sleeve holder 34. After the sleeve 106 is held by the sleeve holder 34, as shown in FIG. 7(b), the arm 40 is rotated to move the flare member 38 from the second position to the first position.

[0055] 7(b), when the sleeve 106 is held by the sleeve holder 34, the fitting portion 106b of the sleeve 106 is fitted into the inner circumferential surface 41a of the cylindrical portion 41. In addition, an end face 106b1 of the fitting portion 106b and the inner wall surface 42a of the wall portion 42 abut against each other. As a result, the sleeve 106 is held in the radial and axial directions by the inner circumferential surface 41a and the inner wall surface 42a of the sleeve holder 34. Furthermore, later, when the sleeve 106 is pressed into the end 102a of the plastic pipe 102, the sleeve 106 is pressed in one axial direction by a pressing force applied from the press-in rod 12 via the wall portion 42 abutting against the end face 106b1 and the jig body 36. Therefore, the sleeve holder 34 can press the sleeve 106 in one axial direction while holding the sleeve 106 in the radial direction without coming into contact with the inner peripheral surface of the sleeve 106. As a result, the sleeve 106, which is press-fitted into the plastic pipe 102, can be held while preventing foreign matter from adhering to the inner peripheral surface of the sleeve 106.

[0056] Furthermore, since the cylindrical portion 41 of the sleeve holder 34 has an inner tapered surface 41b, when the sleeve 106 is inserted into and held in the cylindrical portion 41 of the sleeve holder 34, even if there is some dimensional error in the sleeve 106, the sleeve 106 can be smoothly inserted into the cylindrical portion 41.

[0057] Also, as shown in FIG. 7(b), the flare member 38 arranged in the first position is located between the end 102a of the plastic tube 102 and the sleeve 106, and the protrusion 39 faces the end 102a of the plastic tube 102 with the central axis S and central axis C of the protrusion 39 positioned on the same straight line.

[0058] As shown in FIG. 7(b), after moving the flare member 38 from the second position to the first position, the user operates the lever 24 of the press-in device 1 to advance the press-in rod 12 and the sleeve holding jig 6 attached to the tip 12a of the press-in rod 12 in one axial direction. When the sleeve holding jig 6 is advanced in one axial direction with the flare member 38 in the first position, the tapered surface 39a of the projection 39 comes into contact with the end 102a of the plastic pipe 102, and the projection 39 is pressed against the end 102a of the plastic pipe 102. The projection 39 is pressed against the end 102a, causing the diameter of the end 102a to expand. In this manner, the end 102a of the resin pipe 102 is flared.

[0059] As shown in FIG. 8(a), after flaring, the user retracts the press-fit rod 12 and the sleeve holding jig 6 in the other axial direction, and moves the flare member 38 from the first position to the second position. Here, as described above, the rotation axis R is offset upward from the central axis C (toward the second position). Therefore, the locus K1 of point P on the flare member 38 moving between the first position and the second position can be made to be farther away from the sleeve holder 34 and the sleeve 106 than the locus K2 of point P when the flare member 38 in the first position is rotated around a rotation axis T perpendicular to the central axis C. When the flared member 38 passes through the locus K2, the point P contacts the sleeve 106. However, when the flared member 38 passes through the locus K1, the point P does not contact the sleeve 106. Therefore, contact between the sleeve 106 and the flare member 38 can be avoided while the flare member 38 in the first position can be brought closer to the sleeve holder 34 and the sleeve 106, and the sleeve holding jig 6 can be made more compact. Point P is a point on the cross section of flare member 38, and is the point where inner surface 38a and central axis C intersect when flare member 38 is located in the first position.

[0060] In FIG. 8(a), an end 102a of a resin pipe 102 is expanded in diameter by flaring. Furthermore, the flare member 38 arranged at the second position is removed from between the end 102a of the plastic pipe 102 and the sleeve 106. Therefore, the sleeve 106 is not blocked by the flare member 38 and faces the end 102a of the plastic pipe 102 arranged on one axial side.

[0061] As shown in FIG. 8(a), after moving the flare member 38 from the first position to the second position, the user operates the lever 24 of the press-in device 1 to advance the press-in rod 12 and the sleeve holding jig 6 in one axial direction. At this time, the sleeve 106 and the end 102a of the plastic pipe 102 are opposed to each other, so that the sleeve 106 is butted against the end 102a of the expanded plastic pipe 102, and further, by advancing the press-in rod 12 and the sleeve holding jig 6 in one axial direction, the sleeve 106 is pressed into the end 102a of the plastic pipe 102.

[0062] As shown in FIG. 8(b), after press-fitting the sleeve 106 onto the end 102a of the resin tube 102, the user retracts the press-fitting rod 12 and the sleeve holding jig 6 in the other axial direction, thereby completing the press-fitting of the sleeve 106.

[0063] In this manner, in this embodiment, after the sleeve 106 is held by the sleeve holder 34, the flare member 38 is moved to the first position, thereby enabling flaring of the end 102a of the plastic pipe 102. Further thereafter, the flare member 38 is moved to the second position and removed from between the plastic pipe 102 and the sleeve 106, thereby enabling the sleeve 106 to be press-fitted into the plastic pipe 102. In this way, the flare member 38 is constructed as a separate part from the sleeve holder 34 and can be moved as needed. Therefore, the flare member 38 and the sleeve holder 34 do not slide against each other to generate foreign matter, and foreign matter can be more effectively prevented from adhering to the sleeve 106.

[0064] 〔others〕 The embodiments disclosed herein are illustrative in all respects and are not restrictive. For example, in the above embodiment, the sleeve holding jig 6 includes the sleeve holder 34 and the jig body 36, but the sleeve holder 34 and the jig body 36 may be integrated.

[0065] In addition, in the above embodiment, an example was given of a case in which the moving mechanism 45 for moving the flare member 38 includes a pair of arms 40 provided on the jig main body 36, but this is not limited to this, and for example, a moving device for moving the flare member 38 between a first position and a second position may be provided on the rail 28 (Figures 1 and 2) of the pipe holding portion 4, etc. as the moving mechanism 45.

[0066] In addition, in the above embodiment, the second position is illustrated as a position where the flare member 38 is removed from between the plastic tube 102 and the sleeve 106 and is above the jig body 36 and the sleeve holder 34, but the second position may be any position where the flare member 38 is removed from between the plastic tube 102 and the sleeve 106 and is removed in the left-right or downward direction.

[0067] In the above embodiment, the press-fitting device 1 is used by a user holding the grip 16, but the press-fitting device 1 may be, for example, a tabletop type in which each section is installed on a desk.

[0068] The scope of the present invention is not limited to the above-described embodiment, but includes all modifications within the scope of the equivalents of the configurations described in the claims. [Explanation of symbols]

[0069] 1 Press-fitting device 2. Device body 4 Pipe holding part 6 Sleeve holding jig 10 Aircraft 10a 1st hole 10b 2nd hole 10c interior space 12 Press-fit rod 12a Tip 12a1 End face 12a2 screw hole 12b Hole 13 Mounting hole 14 Moving mechanism 15 Setscrew 16 Grip 18 Lola 22 Sleeve 24 Lever 24a Operation section 24b Lever tip 24c hole 26 Support shaft 28 Rail 30 Clamp 30a Lower Block 30a1 retaining groove 30b Upper Block 30b1 Retaining groove 30c Lock section 31 Volts 34 Sleeve holder 36 Jig body 36a Mounting shaft 36a1 fixing hole 36b Mounting surface 36b1 screw hole 36c side 36d through hole 38 Flare member 38a Inside 38a1 Recess 38b External surface 39 Protrusion 39a Tapered surface 40 Arm (Arm component) 40a Main body 40a1 One side 40a2 proximal surface 40b Protrusion 40b1 Tip surface 40b2 hinge hole 40c tip 41 Cylindrical part 41a Inner surface 41b Inner tapered surface 42 Wall 42a Inner wall 42b External surface 43 Male thread 44 Flat head screw 45 Moving mechanism 48 Stopper 48a front 48b Top 50 Hinge pin 50a head 50b Large diameter section 50c small diameter section 50d Step 100 Plastic pipe fittings 102 Plastic pipe 102a End 102b Sloped section 104 Fitting body 104a Main body 104b Cylinder part 104b1 Male thread 104b2 Inner edge 106 Sleeve 106a Press-fit part 106a1 Bulge 106b Mating part 106b1 End face 106b2 Outer surface 108 Union nut 108a Female thread C center axis K1 trajectory K2 locus R Rotational axis S center axis

Claims

1. A sleeve holding jig for holding a sleeve that is press-fitted in one axial direction into the inside of an end of a resin pipe, A sleeve holder; a jig body having a mounting surface on one axial side to which the sleeve holder is attached; a flare member having a protrusion that is inserted into an end of the resin pipe to expand the diameter of the end; a moving mechanism for moving the flare member, The sleeve holder includes: a cylindrical portion having an inner circumferential surface that fits into an outer circumferential surface of an end portion of the sleeve on the other axial side, the cylindrical portion being disposed coaxially with a central axis of the resin pipe; an inner wall surface provided on the other axial side of the cylindrical portion and abutting on an end surface on the other axial side of the sleeve, The moving mechanism moves the flare member relative to the jig body between a first position where the protrusion faces the end of the plastic pipe and the sleeve, with the central axis of the protrusion and the central axis of the cylindrical portion positioned on the same straight line, and a second position where the flare member is removed from between the plastic pipe and the sleeve. Sleeve holding fixture.

2. The cylindrical portion is provided adjacent to one axial side of the inner circumferential surface and has an inner circumferential tapered surface that increases in diameter toward the one axial side. The sleeve holding jig according to claim 1 .

3. The sleeve holder is removably attached to the mounting surface. The sleeve holding jig according to claim 1 or 2.

4. The moving mechanism includes an arm member that extends from the jig body, has the flare member attached to a tip thereof, and is rotatable about a rotation axis that is perpendicular to the axial direction. The sleeve holding jig according to any one of claims 1 to 3.

5. A sleeve holding tool for holding a sleeve that is pressed into an inner end of a plastic pipe in one axial direction, A sleeve holder; a jig body having a mounting surface on one axial side to which the sleeve holder is attached; a flare member having a protrusion that is inserted into an end of the resin pipe to expand the diameter of the end; a moving mechanism for moving the flare member, The sleeve holder includes: a cylindrical portion having an inner circumferential surface that fits into an outer circumferential surface of an end portion of the sleeve on the other axial side, the cylindrical portion being disposed coaxially with a central axis of the resin pipe; an inner wall surface provided on the other axial side of the cylindrical portion and abutting on an end surface on the other axial side of the sleeve, the moving mechanism includes an arm member extending from the jig body, with the flare member attached to a tip thereof, rotatable about a rotation axis perpendicular to an axial direction, and moves the flare member between a first position between the end of the plastic tube and the sleeve, where the protrusion and the end of the plastic tube face each other with the central axis of the protrusion and the central axis of the cylindrical portion positioned on the same straight line, and a second position where the flare member is out of between the plastic tube and the sleeve; The rotation axis is offset toward the second position from the central axis of the cylindrical portion. Sleeve holding fixture.

6. A press-fitting device that presses a sleeve into an inside end of a resin pipe in one axial direction, A pipe holding portion for holding the resin pipe; A sleeve holding jig for holding the sleeve; a press-fitting rod to which the sleeve holding jig is attached at one axial end; A moving mechanism that moves the press-fit rod in an axial direction; Equipped with The sleeve holding jig is a sleeve holding jig according to any one of claims 1 to 5. Pressing device.

Images