Jig for manufacturing hose fittings

Abstract

We manufacture hose fittings with improved quality by crimping the socket onto the nipple in the correct position. [Solution] The jig 10A for manufacturing hose fittings includes a jig body 12 having a positioning cylinder 16 that positions the socket cylindrical portion 98 and the hose insertion portion 90 coaxially when inserted into an annular space S, a socket contact portion 18 that abuts against the end 9804 of the socket cylindrical portion 98 located opposite the crimped portion 96 and positions the socket cylindrical portion 98 and the hose insertion portion 90 in the longitudinal direction, and a magnet 30A that attracts the socket cylindrical portion 98 and the hose insertion portion 90 by magnetic force and maintains their positioned state, and a gripping portion 14 for attachment and detachment provided on the jig body 12 at a length that can be grasped by fingers, located opposite the positioning cylinder 16.

Description

Technical Field

[0001] The present invention relates to a jig for manufacturing a hose joint fitting.

Background Art

[0002] As shown in FIG. 10(C), the hose joint fitting 80 includes a nipple 82 and a socket 94. As shown in FIG. 10(A), the nipple 82 is configured such that the device-side coupling portion 84, the hexagonal portion 86, the flange portion 88, and the hose insertion portion 90 are arranged coaxially, and a flow path R is formed through the centers thereof. The device-side coupling portion 84 is a portion that is detachably connected to the device side. In the present embodiment, it is formed of a male screw, but the device-side coupling portion 84 may have any structure as long as it can be attached to the device side, and various conventionally known structures can be adopted. The hexagonal portion 86 is provided at the end of the device-side coupling portion 84 in a hexagonal column shape. Note that it is optional to use a large-diameter portion formed of a circumferential surface instead of the hexagonal portion 86. The flange portion 88 is provided adjacent to the hexagonal portion 86, and a caulking recess 92 for attaching the socket 94 is formed between the flange portion 88 and the hexagonal portion 86. The hose insertion portion 90 is a portion that is inserted into the inner peripheral surface of a hose (not shown). The hose insertion portion 90 projects from the flange portion 88, and the flange portion 88 can abut against the end of the hose. A plurality of locking irregularities 9002 extending in the circumferential direction are formed at intervals in the axial direction on the outer peripheral surface of the hose insertion portion 90.

[0003] As shown in FIG. 10(B), the socket 94 is cylindrical, and a cylindrical caulked portion 96 and a socket cylindrical portion 98 are arranged coaxially. A plurality of locking projections 9802 extending in the circumferential direction are formed at intervals in the axial direction of the socket 94 on the inner peripheral surface of the socket cylindrical portion 98. The crimped portion 96 is provided at the end of the socket cylindrical portion 98, and the inner circumference of the crimped portion 96 is provided to abut against the outer circumference of the hexagonal portion 86 when the hose insertion portion 90 is inserted into the socket cylindrical portion 98, as shown in Figure 10(A). As shown in Figure 10(C), the crimped portion 96 is crimped into the crimping recess 92 of the nipple 82, thereby fixing the socket 94 so that it cannot move in the axial direction of the nipple 82. With the crimped portion 96 attached to the crimping recess 92, the socket cylindrical portion 98 is located coaxially with the hose insertion portion 90 and radially outward from the hose insertion portion 90, forming an annular space S for hose insertion between the inner circumference of the socket cylindrical portion 98 and the outer circumference of the hose insertion portion 90. The annular space S has an opening 8002 at one end in the axial direction of the socket cylindrical portion 98 and the hose insertion portion 90. When attaching such a hose fitting 80 to a hose (not shown), the end of the hose is inserted into the annular space S through the opening 8002, and the socket cylindrical portion 98 is crimped from the radially outer side to the radially inner side. This causes the inner circumferential surface of the hose end to be in close contact with the outer circumferential surface of the hose insertion portion 90, and the outer circumferential surface of the hose end to be in close contact with the inner circumferential surface of the socket cylindrical portion 98.

[0004] Conventionally, such hose fittings 80 have been manufactured using a crimping device 110 as shown in Figure 11. The crimping device 110 comprises an upright wall portion 114, a crimping mechanism (not shown) provided on one side of the wall portion 114, a plurality of crimping claw support members 118 supported by the crimping mechanism, and crimping claws 116 supported by each crimping claw support member 118. Furthermore, a jig (mandrel) 112 is provided protruding from the wall portion 114 so as to be positioned on the central axis of crimping by multiple crimping claws 116. The jig 112 includes a cylindrical portion 112A that is inserted into the annular space S. The outer circumferential surface of the cylindrical portion 112A is in contact with the inner circumferential surface of the socket cylindrical portion 98, and the inner circumferential surface of the cylindrical portion 112A is formed to be in contact with the outer circumferential surface of the hose insertion portion 90. As shown in Figure 11(A), if the worker grasps the equipment-side coupling portion 84 of the nipple 82 and moves it toward the wall portion 114 so that the cylindrical portion 112A of the jig 112 enters the annular space S, the socket 94 and the nipple 82 are positioned coaxially and longitudinally. Therefore, in the crimping device 110 having the jig 112, a hose fitting 80 is obtained in which the socket 94 and nipple 82 are positioned and crimped by the crimping claws 116. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2017-194133 [Overview of the project] [Problems that the invention aims to solve]

[0006] On the other hand, there are also crimping devices that do not have a jig (mandrel), in which a cavity is formed in the wall portion 114 located on the crimping central axis. In such a crimping device, the socket 94 and nipple 82 cannot be positioned coaxially and longitudinally, so the operator must adjust the relative positions of the socket 94 and nipple 82 each time the crimping operation is performed. However, before the crimping action by the crimping claws began, the relative positions of the socket and nipple would sometimes become misaligned, or the socket would detach from the nipple and fall off. Therefore, some improvement was desired to increase the efficiency of the crimping process.

[0007] The present invention has been made in view of the above circumstances, and aims to provide a jig for manufacturing hose fittings that is advantageous in manufacturing hose fittings with improved quality by suppressing misalignment of the positional relationship between the socket and the nipple, preventing the socket or nipple from coming loose and falling, and crimping the socket to the nipple in the correct position. [Means for solving the problem]

[0008] To achieve the above-mentioned objective, one embodiment of the present invention provides a jig for manufacturing a hose fitting comprising a socket and a nipple, wherein the hose insertion portion of a magnetic nipple is inserted into the inner circumference of the socket cylindrical portion of the magnetic socket, the crimped portion at the end of the socket cylindrical portion is crimped into the crimping recess of the nipple, and an annular space for hose insertion is formed between the socket cylindrical portion and the hose insertion portion, the jig being inserted into the annular space and the socket cylindrical portion and the nipple being inserted into the annular space The jig body is characterized by comprising: a positioning cylinder for positioning the hose insertion portion coaxially; a socket contact portion that abuts against the end of the socket cylindrical portion located opposite the crimped portion when the positioning cylinder is inserted into the annular space, thereby positioning the socket cylindrical portion and the hose insertion portion in the longitudinal direction; a magnet that attracts the socket cylindrical portion and the hose insertion portion by magnetic force and maintains their positioned state; and a gripping portion for attachment and detachment provided on the jig body opposite the positioning cylinder, with a length that allows it to be grasped by a finger. Furthermore, one embodiment of the present invention is characterized in that the socket contact portion and the mounting / detaching gripping portion are formed with the same outer diameter. Furthermore, one embodiment of the present invention is characterized in that the positioning cylindrical portion is formed by the magnet. Furthermore, one embodiment of the present invention is characterized in that the jig body is formed from the magnet. Furthermore, in one embodiment of the present invention, the jig body and the gripping portion for mounting and detachment are formed of a magnetic material, and the magnet is provided on the gripping portion for mounting and detachment. Furthermore, in one embodiment of the present invention, a rod-shaped member is provided that protrudes in the opposite direction from the positioning cylinder from a location on the jig body opposite to the positioning cylinder, and the rod-shaped member constitutes a gripping portion for handling the positioned socket and nipple during the crimping operation in which the crimped portion is crimped into the crimping recess, and also constitutes a gripping portion for mounting and detaching. Furthermore, in one embodiment of the present invention, a rod-shaped member is provided that protrudes in the opposite direction from the positioning cylinder from a location on the jig body opposite to the positioning cylinder, and the rod-shaped member constitutes a gripping portion for handling the positioned socket and nipple during the crimping operation in which the crimped portion is crimped into the crimping recess, and also constitutes a gripping portion for mounting and unmounting, and the jig body and the gripping portion for mounting and unmounting are made of a magnetic material, and the magnet is sandwiched between the gripping portion for crimping and the gripping portion for mounting and unmounting. Furthermore, in one embodiment of the present invention, a rod-shaped member is provided that protrudes in the opposite direction from the positioning cylinder from a location on the jig body opposite to the positioning cylinder, and the rod-shaped member constitutes a gripping portion for handling the positioned socket and nipple during the crimping operation in which the crimped portion is crimped into the crimping recess, and also constitutes a gripping portion for mounting and unmounting, and the jig body, the gripping portion for mounting and unmounting and the gripping portion for crimping are formed of a magnetic material, and the magnet is provided on the gripping portion for crimping. [Effects of the Invention]

[0009] According to one embodiment of the present invention, when performing the crimping operation, the socket cylindrical portion and the hose insertion portion can be held in a position by the magnetic force of a magnet using a jig for manufacturing hose fittings. This suppresses misalignment of the positional relationship between the socket and the nipple, prevents the socket or nipple from coming loose and falling, and allows the socket to be crimped onto the nipple in the correct position, which is advantageous for efficiently manufacturing high-quality hose fittings. [Brief explanation of the drawing]

[0010] [Figure 1] It is a cross-sectional view of a jig for manufacturing a hose joint fitting of the first embodiment. [Figure 2] It is a cross-sectional view of a state in which the positioning cylinder portion of the jig for manufacturing a hose joint fitting of the first embodiment is inserted into an annular space. [Figure 3] It is a cross-sectional view showing a state before the socket positioned with respect to the nipple is clamped to the nipple. [Figure 4] It is a cross-sectional view showing a state in which the socket is clamped to the nipple. [Figure 5] It is a perspective view showing an example of a clamping device. [Figure 6] It is a cross-sectional view showing a state in which the positioning cylinder portion of the jig for manufacturing a hose joint fitting of the second embodiment is inserted into an annular space, the nipple and the socket are positioned, and the positioned state is held by magnetic force. [Figure 7] It is a cross-sectional view showing a state in which the positioning cylinder portion of the jig for manufacturing a hose joint fitting of the third embodiment is inserted into an annular space, the nipple and the socket are positioned, and the positioned state is held by magnetic force. [Figure 8] It is a cross-sectional view showing a state in which the positioning cylinder portion of the jig for manufacturing a hose joint fitting of the fourth embodiment is inserted into an annular space, the nipple and the socket are positioned, and the positioned state is held by magnetic force. [Figure 9] (A) and (B) are cross-sectional views showing a state in which the positioning cylinder portion of the jig for manufacturing a hose joint fitting of the fifth embodiment is inserted into an annular space, the nipple and the socket are positioned, and the positioned state is held by magnetic force. [Figure 10] (A) is a cross-sectional view of the nipple, (B) is a cross-sectional view of the socket, and (C) is a cross-sectional view of the hose joint fitting in which the socket is clamped to the nipple. [Figure 11](A) is a cross-sectional view showing the socket before it is crimped by a crimping device with a mandrel, and (B) is a cross-sectional view showing the socket after it has been crimped. [Modes for carrying out the invention]

[0011] (First Embodiment) Hereinafter, embodiments of the present invention will be described with reference to the drawings. The jig 10A for manufacturing hose fittings shown in Figure 1 is a jig used when crimping the crimped portion 96 of the socket 94 of the hose fitting 80 into the crimping recess 92 of the nipple 82. The socket 94 and nipple 82 of the hose fitting 80, which uses the hose fitting manufacturing jig 10A, are both made of a magnetic material that is attracted by the magnetic force of a magnet. As magnetic materials, materials made of iron, cobalt, nickel, or metals containing these can be used, and various conventionally known magnetic materials are available. The majority of hose fittings 80 sockets 94 and nipples 82 on the market are made of magnetic materials. The crimping device 100 shown in Figures 3 to 5 is used to crimp the socket 94 of the hose fitting 80. The crimping device 100 comprises a wall portion 104 erected from a base 102, a crimping mechanism (not shown) provided on the back side 104B of the wall portion 104, a plurality of crimping claw support members 108 supported by the crimping mechanism, and crimping claws 106 supported by each crimping claw support member 108. A cavity 105 is provided in the wall portion 104, and the worker inserts the socket 94 and nipple 82 to be crimped from the back side 104B of the wall portion 104 through the cavity 105 toward the space surrounded by multiple crimping claws 116, and the crimping operation is performed by operating the switch SW.

[0012] As shown in Figures 1 and 2, the jig 10A for manufacturing hose fittings in this embodiment is configured to include a jig body 12, a gripping part 14 for attachment and detachment, a magnet 30A, and a gripping part 15 for crimping work. The jig body 12 is composed of a positioning cylindrical portion 16 and a socket contact portion 18. The positioning cylindrical portion 16 is cylindrical in shape and is formed to be insertable and detachable into the annular space S between the socket cylindrical portion 98 and the hose insertion portion 90. When inserted into the annular space S, it is the part that positions the socket cylindrical portion 98 and the hose insertion portion 90 coaxially. In detail, the outer circumferential surface 1602 of the positioning cylinder portion 16 is provided so as to be able to contact the inner circumference of the socket cylindrical portion 98, and the inner circumferential surface 1604 of the positioning cylinder portion 16 is provided so as to be able to contact the outer circumference of the hose insertion portion 90. As a result, when the positioning cylinder portion 16 is inserted into the annular space S, the socket cylindrical portion 98 and the hose insertion portion 90 are positioned coaxially.

[0013] The socket contact portion 18 is provided at the end of the positioning cylindrical portion 16 and, when the positioning cylindrical portion 16 is inserted into the annular space S, it contacts the end portion 9804 of the socket cylindrical portion 98, which is located opposite the crimped portion 96, and is the point that positions the socket cylindrical portion 98 and the hose insertion portion 90 in the longitudinal direction. In detail, the longitudinal positioning of the socket cylindrical portion 98 and the hose insertion portion 90 is achieved by clamping both longitudinal ends of the socket cylindrical portion 98 between the socket contact portion 18 and the wall portion 8602 of the hexagonal portion 86 of the nipple 82, so that the crimped portion 96 is positioned radially outward of the crimping recess 92.

[0014] The magnet 30A maintains the positioning of the socket cylindrical portion 98 and the hose insertion portion 90 by magnetic attraction between them, with the positioning cylindrical portion 16 attracting them, and the positioning cylindrical portion 16 attracting the socket cylindrical portion 98 and the hose insertion portion 90 by magnetic force, while also maintaining the positioning of the socket cylindrical portion 98 and the hose insertion portion 90 by magnetic attraction between them, with the positioning cylindrical portion 16 positioning them coaxially and the socket contact portion 18 positioning them longitudinally. The positioning cylinder portion 16, or the jig body 12, or the jig body 12 and the attachment / detachment gripping portion 14 described later, are composed of magnets 30A. In this embodiment, the jig body 12 and the attachment / detachment gripping portion 14 are integrally formed by the magnets 30A. When forming the positioning cylinder portion 16, the socket contact portion 18, and the attachment / detachment grip portion 14 with a magnet 30A, if at least the positioning cylinder portion 16 is formed with the magnet 30A, it is possible to maintain the positioning of the socket cylindrical portion 98 and the hose insertion portion 90. In this case, the socket contact portion 18 and the attachment / detachment grip portion 14 can be formed from separate components from the positioning cylinder portion 16 and attached to the positioning cylinder portion 16 using screws, adhesive, or the like. Similarly, the positioning cylinder portion 16 and the socket contact portion 18 may be integrally formed with the magnet 30A, and the attachment / detachment grip portion 14 may be formed from a separate component and attached to the socket contact portion 18 using screws, adhesive, or the like. In this invention, the term "magnet" includes magnets manufactured by bringing a magnetic force close to a magnetic material to magnetize it, and permanent magnets. This embodiment uses the former type of magnetized magnet, making it easy to process into a desired shape.

[0015] The attachment / detachment gripping portion 14 is the part that grips the jig body 12 in order to insert and detach the positioning cylindrical portion 16 into the annular space S. The attachment / detachment gripping portion 14 is formed on the jig body 12 at a location opposite to the positioning cylinder portion 16, coaxially with the positioning cylinder portion 16, and is long enough to be grasped with a finger. For example, a length of 2 cm to 4 cm is sufficient. In this embodiment, the attachment / detachment gripping portion 14 is formed with the same outer diameter as the socket contact portion 18, and a large length is secured for gripping with the fingers.

[0016] The crimping gripping section 15 is composed of a rod-shaped member that protrudes coaxially with the positioning cylindrical section 16 from a location on the jig body 12 opposite to the positioning cylindrical section 16, and in this embodiment, it is composed of a cylindrical rod material. The gripping portion 15 for crimping may be made of a non-magnetic metal material or synthetic resin material, and various conventionally known materials can be used. The crimping gripping part 15 is a component for handling the socket 94 and nipple 82, which are in a state where the hose insertion part 90 is inserted into the inner circumference of the socket cylindrical part 98, when crimping the part to be crimped 96 into the crimping recess 92. More specifically, as shown in Figure 5, when the socket 94 and nipple 82, positioned by the positioning cylindrical portion 16 and the socket contact portion 18, are inserted from the back surface 104B side of the wall portion 104 through the cavity 105 into the space surrounded by the multiple crimping claws 106, the portion that protrudes from the cavity 105 to the back surface 104B side of the wall portion 104 is formed to be long enough to be grasped with a finger. This length is appropriately determined by the thickness of the wall portion 104 and the distance from the front surface 104A of the wall portion 104 to the crimping claw 106, and it is sufficient that the jig 10A for manufacturing hose fittings is held in place by extending beyond the crimping device 100, for example, it is several times the length of the socket 94. The tip of the crimping grip 15 is inserted into the recess 1404 of the attachment / detachment grip 14 and attached to the attachment / detachment grip 14 with adhesive. Therefore, since the crimping gripping section 15 also constitutes the mounting / unmounting gripping section 14, the mounting / unmounting gripping section 14 can be omitted if the crimping gripping section 15 is provided. If the attachment / detachment gripping portion 14 is omitted, a rod-shaped member is provided that protrudes in the opposite direction from the positioning cylindrical portion 16 from the socket contact portion 18, which is located opposite the positioning cylindrical portion 16.

[0017] Next, a method for manufacturing a hose fitting 80 by crimping a socket 94 onto a nipple 82 using a jig 10A for manufacturing hose fittings will be described. As shown in Figure 2, the hose insertion portion 90 is inserted into the socket cylindrical portion 98, forming an annular space S between the inner circumference of the socket cylindrical portion 98 and the outer circumference of the hose insertion portion 90. Then, the positioning cylinder portion 16 is inserted into the annular space S, the positioning cylinder portion 16 positions the socket cylindrical portion 98 and the hose insertion portion 90 coaxially, and the socket contact portion 18 positions the socket cylindrical portion 98 and the hose insertion portion 90 in the longitudinal direction. The positioning is then maintained by the positioning cylinder 16 attracting the inner circumference of the socket cylinder 98 and the outer circumference of the hose insertion part 90 with the magnetic force of the magnet 30A.

[0018] Next, as shown in Figure 5, the worker grasps the crimping gripping part 15 and inserts the hose fitting manufacturing jig 10A into the cavity 105 of the crimping device 100 from the back side 104B with the jig body 12 facing the tip, and as shown in Figure 3, visually positions the crimping claws 106 of the crimping device 100 and the crimped portion 96 of the socket 94 in the longitudinal direction (axial direction). Then, the switch SW is operated to perform the crimping operation with the crimping claws 106. Even if the axes of the socket 94 and nipple 82 are not positioned at the center of the multiple crimping claws 106 at the start of the crimping operation, as the multiple crimping claws 106 move radially inward, the cylindrical crimping surfaces of the multiple crimping claws 106 guide the part to be crimped 96 towards the crimping center of the crimping device 100, and the part to be crimped 96 is crimped into the crimping recess 92. Next, the switch SW is operated to open the mold and remove the hose fitting 80 that has been sucked into the positioning cylinder 16. The worker grasps the crimping gripping part 15 with one hand and the socket 94 or nipple 82 with the other hand, and pulls the positioning cylinder part 16 out of the annular space S of the hose fitting 80 with a force greater than the magnetic attraction force, thereby obtaining the hose fitting 80 with the socket 94 attached to the nipple 82.

[0019] The jig 10A for manufacturing hose fittings in this embodiment includes a jig body 12 having a positioning cylinder 16 that is removably inserted into an annular space S and positions the socket cylindrical portion 98 and the hose insertion portion 90 coaxially when inserted into the annular space S, a socket contact portion 18 that, when the positioning cylinder 16 is inserted into the annular space S, abuts against the end 9804 of the socket cylindrical portion 98 located opposite the crimped portion 96 and positions the socket cylindrical portion 98 and the hose insertion portion 90 in the longitudinal direction, and a magnet 30A that attracts the socket cylindrical portion 98 and the hose insertion portion 90 by magnetic force and maintains their positioned state, and a gripping portion 14 for insertion and removal provided on the jig body 12 at a location opposite the positioning cylinder 16 and having a length that allows it to be grasped by a finger. Therefore, when performing the crimping operation, the hose fitting manufacturing jig 10A can hold the socket cylindrical part 98 and the hose insertion part 90 in a positioned state using the magnetic force of the magnet 30A. This suppresses misalignment of the positional relationship between the socket 94 and the nipple 82, prevents the socket 94 and nipple 82 from coming loose and falling, and allows the socket 94 to be crimped onto the nipple 82 in the correct position, which is advantageous for efficiently manufacturing high-quality hose fittings 80. Furthermore, since the positioning cylinder portion 16, the socket contact portion 18, and the attachment / detachment gripping portion 14 are integrally formed with the magnet 30A, the jig 10A for manufacturing hose fittings can be constructed with a simple structure, which is advantageous for manufacturing the jig 10A for manufacturing hose fittings inexpensively and reliably.

[0020] (Second Embodiment) Next, a second embodiment will be described with reference to Figure 6. In the first embodiment, the positioning cylinder portion 16, the socket contact portion 18, and the mounting / detachment gripping portion 14 were integrally formed with a magnet 30A, whereas in the second embodiment, a magnet 30B is provided separately from the positioning cylinder portion 16, the socket contact portion 18, and the mounting / detachment gripping portion 14, and the magnet 30B is provided on the mounting / detachment gripping portion 14. In the following description of the embodiments, the same reference numerals are used for parts and components as in the first embodiment, and their descriptions are omitted or simplified. The description will focus on the parts that differ from the first embodiment.

[0021] The hose fitting manufacturing jig 10B of the second embodiment is composed of a positioning cylindrical portion 16, a socket contact portion 18, a gripping portion 14 for mounting and detaching, a gripping portion 15 for crimping work, and a magnet 30B. The positioning cylinder portion 16, the socket contact portion 18, and the attachment / detachment gripping portion 14 are integrally formed from a magnetic material. A recess 1402 is provided at the end of the attachment / detachment gripping portion 14, and a magnet 30B is housed in this recess 1402. The magnets 30B include magnets and permanent magnets that are formed in a cylindrical shape and manufactured by bringing a magnetic force close to a magnetic material to magnetize it. In this embodiment, since the latter permanent magnet is used, the effort of magnetizing can be omitted. The end of the crimping gripping portion 15 is provided with a circular flange 1502 that covers the end face of the mounting / detaching gripping portion 14, and a cylindrical portion 1504 that protrudes from the flange 1502 and covers the outer circumferential surface of the mounting / detaching gripping portion 14. Multiple female threads 1506 are formed at intervals in the circumferential direction of the cylindrical portion 1504.

[0022] With the flange 1502 pressed against the end face of the attachment / detachment gripping portion 14, the outer circumferential surface of the attachment / detachment gripping portion 14 is clamped by multiple bolts 1508 that are screwed into each female thread 1506, thereby attaching the crimping gripping portion 15 to the attachment / detachment gripping portion 14. As a result, the magnet 30B is provided on the attachment / detachment gripping portion 14, and more specifically, the magnet 30B is provided inside the attachment / detachment gripping portion 14. Since the positioning cylinder portion 16, the socket contact portion 18, and the attachment / detachment gripping portion 14 are integrally formed from a magnetic material, the positioning cylinder portion 16 attracts the socket cylindrical portion 98 and the hose insertion portion 90 by magnetic force transmitted from the magnet 30B, and the socket cylindrical portion 98 and the hose insertion portion 90 are held in a positioned state. Therefore, the same effects as those of the first embodiment can be achieved with this second embodiment. Alternatively, the magnet 30B may be formed in an annular shape and placed over the outer circumferential surface of the attachment / detachment gripping portion 14 and the socket contact portion 18, and then attached to the attachment / detachment gripping portion 14 and the socket contact portion 18 with screws or adhesive. In this case, the crimping gripping portion 15 can be attached in the same structure as in the first embodiment.

[0023] (Third embodiment) Next, a third embodiment will be described with reference to Figure 7. The third embodiment is a modification of the second embodiment. In the second embodiment of the hose fitting manufacturing jig 10B, a magnet 30B was provided on the attachment / detachment gripping portion 14, whereas in the third embodiment of the hose fitting manufacturing jig 10C, a magnet 30C is sandwiched and positioned between the attachment / detachment gripping portion 14 and the crimping work gripping portion 15, while other parts are the same as in the second embodiment. A circular magnet positioning recess 1412 is provided on the end face of the attachment / detachment gripping portion 14, and multiple female threads 1414 are formed around this recess 1412 at intervals in the circumferential direction. The depth of the magnet positioning recess 1412 is formed to be smaller than the thickness of the cylindrical magnet 30C. A circular flange 1512 is provided at the end of the crimping grip portion 15, covering the end face of the attachment / detachment grip portion 14. A bolt insertion hole 1514 is formed in the flange 1512 at a location that matches the female thread 1414.

[0024] One portion of the magnet 30C in the thickness direction is housed and positioned in the magnet positioning recess 1412, the flange 1512 of the crimping gripping portion 15 is pressed against the other end face of the magnet 30C in the thickness direction, and multiple bolts 1516 inserted through each bolt insertion hole 1514 are screwed into the female threads 1414, thereby clamping the magnet 30C between the bottom surface of the magnet positioning recess 1412 and the flange 1512. As a result, the magnet 30C is positioned between the attachment / detachment gripping part 14 and the crimping work gripping part 15. Since the positioning cylinder portion 16, the socket contact portion 18, and the attachment / detachment gripping portion 14 are integrally formed from a magnetic material, the positioning cylinder portion 16 attracts the socket cylindrical portion 98 and the hose insertion portion 90 by magnetic force transmitted from the magnet 30C, and the socket cylindrical portion 98 and the hose insertion portion 90 are held in a positioned state. Therefore, the same effects as those of the first embodiment are achieved by this third embodiment as well.

[0025] (Fourth embodiment) Next, a fourth embodiment will be described with reference to Figure 8. The fourth embodiment is a modification of the second embodiment. In the second embodiment of the hose fitting manufacturing jig 10B, a magnet 30B was provided on the attachment / detachment gripping portion 14. In contrast, the fourth embodiment of the hose fitting manufacturing jig 10D differs in that the magnet 30D is provided on the crimping work gripping portion 15, and in addition to the positioning cylinder portion 16, socket contact portion 18, and attachment / detachment gripping portion 14, the crimping work gripping portion 15 is also made of a magnetic material. The coupling structure between the crimping gripping section 15 and the attachment / detachment gripping section 14 is the same as in the first embodiment. The magnet 30D is cylindrical and positioned on the outer surface of the crimping grip 15 near the attachment / detachment grip 14. The end face of the magnet 30D is in contact with the end face of the attachment / detachment grip 14 and attached to the outer surface of the crimping grip 15 with adhesive. Alternatively, it may be attached with screws instead of adhesive. Since the positioning cylinder portion 16, the socket contact portion 18, the attachment / detachment gripping portion 14, and the crimping gripping portion 15 are made of a magnetic material, the positioning cylinder portion 16 attracts the socket cylindrical portion 98 and the hose insertion portion 90 by magnetic force transmitted from the magnet 30D, and the socket cylindrical portion 98 and the hose insertion portion 90 are held in a positioned state. Therefore, the same effects as those of the first embodiment are achieved by this fourth embodiment as well.

[0026] (Fifth embodiment) Next, a fifth embodiment will be described with reference to Figure 9. The fifth embodiment is a modification of the first embodiment. The first embodiment of the hose fitting manufacturing jig 10A was equipped with a gripping portion 15 for crimping work, but the fifth embodiment of the hose fitting manufacturing jig 10E differs in that it does not have a gripping portion 15 for crimping work, and the outer diameters of the socket contact portion 18 and the attachment / detachment gripping portion 14 are different. In other words, the jig 10E for manufacturing hose fittings of the fifth embodiment comprises a positioning cylindrical portion 16, a socket contact portion 18, and a gripping portion 14 for mounting and detaching, and is integrally formed by a magnet 30E. Therefore, similar to the first embodiment, when the positioning cylindrical portion 16 is inserted into the annular space S, the positioning cylindrical portion 16 positions the socket cylindrical portion 98 and the hose insertion portion 90 coaxially, and the socket contact portion 18 positions the socket cylindrical portion 98 and the hose insertion portion 90 in the longitudinal direction. This positioned state is maintained by the magnetic force of the magnet 30E, which attracts the inner circumference of the socket cylindrical portion 98 and the outer circumference of the hose insertion portion 90.

[0027] In Figure 9(A), the socket 94 and nipple 82, which are positioned and held in this manner on the front surface 104A side of the wall portion 104, are gripped by the mounting / detachment gripping portion 14 and the crimped portion 96 of the socket 94 is inserted inside the multiple crimping claws 106. Then, the longitudinal (axial) positioning of the multiple crimping claws 106 and the part to be crimped 96 is determined by visual inspection, and the crimping operation is performed by pressing, for example, a foot switch. In Figure 9(B), the socket 94 and nipple 82, which are positioned and held in this manner on the front surface 104A side of the wall portion 104, are inserted into the crimped portion 96 of the socket 94 by gripping the equipment-side coupling portion 84 of the nipple 82 and inserting it into the inside of the multiple crimping claws 106. Then, the longitudinal (axial) positioning of the multiple crimping claws 106 and the part to be crimped 96 is determined by visual inspection, and the crimping operation is performed by pressing, for example, a foot switch. In both Figure 9(A) and Figure 9(B), the socket cylindrical portion 98 and the hose insertion portion 90 are positioned coaxially, and the socket cylindrical portion 98 and the hose insertion portion 90 are positioned in the longitudinal direction. This positioned state is maintained by the magnetic force of the magnet 30E, thus achieving the same effect as in the first embodiment. [Explanation of Symbols]

[0028] 10A, 10B, 10C, 10D, 10E Jigs for manufacturing hose fittings 12. Jig body 14 Grip for loading / unloading 15 Grip for caulking work 16 Positioning cylinder 18 Contact part for socket 30A, 30B, 30C, 30D, 30E Magnets 80 Hose fittings 82 Nipples 84 Equipment connection section 86 Hexagonal part 92 Crimping recess 94 sockets 96 Crimped portion 98 Socket cylindrical part 100 Crimping device 102 Base 104 Wall section 104A Front 104B Back 105 Cavity 106 Crimping claws S-shaped circular space

Claims

1. A jig for manufacturing hose fittings, used when manufacturing a hose fitting consisting of a socket and a nipple, wherein the hose insertion portion of a magnetic nipple is inserted into the inner circumference of the socket cylindrical portion of the magnetic socket, the crimped portion at the end of the socket cylindrical portion is crimped into the crimping recess of the nipple, and an annular space for hose insertion is formed between the socket cylindrical portion and the hose insertion portion. A jig body having: a positioning cylinder that is removably inserted into the annular space and positions the socket cylindrical portion and the hose insertion portion coaxially when inserted into the annular space; a socket contact portion that abuts against the end of the socket cylindrical portion opposite to the crimped portion when the positioning cylinder is inserted into the annular space and positions the socket cylindrical portion and the hose insertion portion in the longitudinal direction; and a magnet that attracts the socket cylindrical portion and the hose insertion portion by magnetic force and maintains their positioned state. A gripping portion for attachment and detachment is provided on the jig body opposite to the positioning cylindrical portion, with a length that allows it to be grasped with a finger, A jig for manufacturing hose fittings, characterized by comprising the following features.

2. The socket contact portion and the mounting / detaching gripping portion are formed with the same outer diameter. A jig for manufacturing hose fittings as described in claim 1.

3. The positioning cylinder portion is formed by the magnet. A jig for manufacturing hose fittings as described in claim 1.

4. The jig body is formed by the aforementioned magnet. A jig for manufacturing hose fittings as described in claim 1.

5. The jig body and the attachment / detachment gripping portion are formed of a magnetic material. The magnet is provided on the attachment / detachment gripping portion. A jig for manufacturing hose fittings as described in claim 1.

6. A rod-shaped member is provided that protrudes in the opposite direction from the positioning cylinder from a location on the jig body opposite to the positioning cylinder, The rod-shaped member constitutes a gripping portion for handling the positioned socket and nipple during the crimping operation in which the crimped portion is crimped into the crimping recess, and also constitutes a gripping portion for mounting and detaching. A jig for manufacturing hose fittings according to any one of claims 1, 3, 4, or 5.

7. A rod-shaped member is provided that protrudes in the opposite direction from the positioning cylinder from a location on the jig body opposite to the positioning cylinder, The rod-shaped member constitutes a gripping portion for handling the positioned socket and nipple during the crimping operation in which the crimped portion is crimped into the crimping recess, and also constitutes a gripping portion for mounting and detaching. The jig body and the attachment / detachment gripping portion are formed of a magnetic material. The magnet is held between the crimping gripping portion and the mounting / detaching gripping portion. A jig for manufacturing hose fittings as described in claim 1.

8. A rod-shaped member is provided that protrudes in the opposite direction from the positioning cylinder from a location on the jig body opposite to the positioning cylinder, The rod-shaped member constitutes a gripping portion for handling the positioned socket and nipple during the crimping operation in which the crimped portion is crimped into the crimping recess, and also constitutes a gripping portion for mounting and detaching. The jig body, the attachment / detachment gripping portion, and the crimping work gripping portion are formed of a magnetic material. The magnet is provided in the gripping part for the crimping operation. A jig for manufacturing hose fittings as described in claim 1.

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