Joint fitting for piping

Abstract

The purpose of the present invention is to suppress damage to a connected pipe by adjusting the length, and to avoid an increase in working hours and an increase in cost during assembly. The present invention is a piping joint fitting (10A) which is provided with a mouthpiece section (22A) (first joint fitting section (12)) and a hose joint section (24A) (second joint fitting section (14)), and which is connected to a fluid passage (R), and which is provided with a coupling mechanism (18). And a coupling mechanism (18) that couples the mouthpiece section (22A) and the hose joint section (24A) such that the total length of the mouthpiece section (22A) and the hose joint section (24A) can be adjusted in a state in which the mouthpiece section (22A) and the hose joint section (24A) are coupled and the interiors of the mouthpiece section (22A) and the hose joint section (24A) communicate with each other. Furthermore, a lock mechanism (20) is provided that locks the total length of the mouth section (22A) and the hose joint section (24A) in an adjusted state.

Description

Technical Field

[0001] The present invention relates to a pipe joint metal fitting. Background Art

[0002] Conventionally, as a pipe fitting, there is provided a hose fitting that is attached to an end of a hose to connect the hose to a device or the like (see Patent Document 1).

[0003] The hose joint metal fitting includes a pipe joint and a sleeve connected to each other, wherein the pipe joint and the sleeve have a pipe joint side cylindrical portion coaxially opened at one axial end and a sleeve side cylindrical portion located radially outward of the pipe joint side cylindrical portion.

[0004] The hose connector metal fitting is installed to the hose end in the following manner: after the hose end is inserted into the annular space formed between the outer circumferential surface of the tubular portion on the pipe connector side and the inner circumferential surface of the tubular portion on the sleeve side, the tubular portion on the sleeve side is riveted using a riveting device, thereby installing the tubular portion on the sleeve side, the hose end and the tubular portion on the pipe connector side as a whole.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2014-181789 Summary of the invention

[0008] Problems to be solved by the invention

[0009] When attaching a hose to such a pipe fitting, a hose of the required length is selected for a product such as a hose assembly. However, since there is a tolerance for hose length, the length of the product assembled within the allowable range may vary.

[0010] The permissible error in length when assembling a hose is specified in JIS (Japanese Industrial Standards). For example, if the length (mm) of the assembly is "1000 or more and less than 2000", the permissible error is specified to be 0 mm or more and 20 mm or less.

[0011] Therefore, for example, when multiple hoses (pipes) are accommodated in a Cableveyor (registered trademark) and moved, the lengths of the hoses are different, so the piping trajectories of the hoses are different. As a result, the hoses do not bend as expected, but come into contact with the Cableveyor (registered trademark) and rub against each other, or excessive stress is applied to the hoses, causing damage to the pipes.

[0012] On the other hand, if the tolerance of the product length is reduced, more accurate measurement is required as a special management item during assembly, which increases the number of work hours and the cost.

[0013] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe joint metal fitting which suppresses damage to the connected pipe by adjusting the length and avoids an increase in work hours and cost during assembly.

[0014] Means used to solve problems

[0015] To achieve the above-mentioned purpose, one embodiment of the present invention is a pipe joint metal fitting, which has a first joint metal fitting part and a second joint metal fitting part and connects a fluid channel, and is characterized in that a combining mechanism is provided, which combines the first joint metal fitting part and the second joint metal fitting part in a manner that can adjust the total length of the first joint metal fitting part and the second joint metal fitting part when the first joint metal fitting part and the second joint metal fitting part are combined and their internals are connected.

[0016] In addition, one embodiment of the present invention is characterized in that a locking mechanism is provided, the locking mechanism locking the total length of the first joint metal fitting part and the second joint metal fitting part in an adjusted state.

[0017] In addition, one embodiment of the present invention is characterized in that an external threaded tube is protrudingly provided at an end of the second joint metal fitting part opposite to the first joint metal fitting part, or at one of the ends of the first joint metal fitting part opposite to the second joint metal fitting part, and an internal thread that can be screwed to the external threaded tube is formed at the other end, and the combining mechanism is constructed to include the external threaded tube and the internal thread.

[0018] In addition, one embodiment of the present invention is characterized in that a lock nut is screwed onto the externally threaded pipe, and a locking mechanism for locking the total length of the first joint metal part and the second joint metal part in an adjusted state is constructed to include the lock nut.

[0019] In addition, one embodiment of the present invention is characterized in that the piping joint metal fitting is constructed to include a cylindrical connector sandwiched between the first joint metal fitting part and the second joint metal fitting part, a rotating operating part for rotating the connector is provided on the outer peripheral part of the middle part in the longitudinal direction of the connector, and external threads opposite to each other are formed on the outer peripheral parts on both sides of the longitudinal direction of the connector, an internal thread for screwing one of the external threads opposite to each other is formed at the end of the second joint metal fitting part opposite to the first joint metal fitting part, and an internal thread for screwing another external thread opposite to each other is formed at the end of the first joint metal fitting part opposite to the second joint metal fitting part, and the coupling mechanism is constructed to include the rotating operating part, the external threads opposite to each other and the internal threads.

[0020] In addition, one embodiment of the present invention is characterized in that locking nuts are respectively screwed onto the mutually opposite external threads, and a locking mechanism that locks the total length of the first joint metal part and the second joint metal part in an adjusted state is constructed to include the locking nuts.

[0021] In addition, one embodiment of the present invention is characterized in that the piping joint metal fitting is constructed to include a tubular connector clamped between the first joint metal fitting part and the second joint metal fitting part, and externally threaded pipes with external threads formed in opposite directions are respectively protruded from the end of the second joint metal fitting part opposite to the first joint metal fitting part and the end of the first joint metal fitting part opposite to the second joint metal fitting part, a rotating operating part for rotating the connector is provided on the outer periphery of the connector, and internal threads in opposite directions to each other that are screwed to the external threads are formed on the inner periphery on both sides of the length direction of the connector, and the combining mechanism is constructed to include the externally threaded pipe and the connector.

[0022] In addition, one embodiment of the present invention is characterized in that locking nuts are respectively screwed onto the mutually opposite external threads, and a locking mechanism that locks the total length of the first joint metal part and the second joint metal part in an adjusted state is constructed to include the locking nuts.

[0023] In one embodiment of the present invention, the first joint metal part is a nozzle part connected to a device side, and the second joint metal part is a hose joint part to which a hose is connected.

[0024] In one embodiment of the present invention, the first joint metal fitting portion and the second joint metal fitting portion are hose joint portions to which hoses are connected.

[0025] In addition, one embodiment of the present invention is characterized in that the first joint metal fitting portion and the second joint metal fitting portion are nozzle portions connected to a device side.

[0026] Effects of the Invention

[0027] According to one embodiment of the present invention, since a coupling mechanism is provided to couple the first joint metal fitting part and the second joint metal fitting part in a manner that can adjust the total length of the first joint metal fitting part and the second joint metal fitting part, the length of the pipe joint metal fitting can be adjusted, thereby helping to suppress damage to the connected pipe and avoid an increase in work hours and cost during assembly. In addition, by releasing the coupling mechanism, the first joint metal fitting part and the second joint metal fitting part can be separated, which helps to improve convenience.

[0028] Furthermore, if a locking mechanism is provided to lock the total length of the first joint metal part and the second joint metal part in an adjusted state, the pipe joint metal part can be fixed at a desired length, which is advantageous in preventing damage to the connected pipe.

[0029] In addition, if an external threaded tube is protrudingly provided on the end of the second joint metal fitting part opposite to the first joint metal fitting part, or on one of the ends of the first joint metal fitting part opposite to the second joint metal fitting part, and an internal thread that can be screwed onto the external threaded tube is formed on the other end, and the combining mechanism is constructed to include the external threaded tube and the internal thread, it is advantageous to simply construct a length-adjustable joint metal fitting for piping.

[0030] In addition, if the locking mechanism is configured to include a lock nut screwed onto the externally threaded pipe, it is advantageous in that the locking mechanism can be configured simply.

[0031] In addition, if the pipe joint metal fitting is constructed to include a cylindrical connector sandwiched between the first joint metal fitting part and the second joint metal fitting part, a rotating operating part is provided on the outer periphery of the middle part in the longitudinal direction of the connector, and external threads opposite to each other are formed on the outer peripheries on both sides, an internal thread for screwing one of the external threads opposite to each other is formed at the end of the second joint metal fitting part opposite to the first joint metal fitting part, and an internal thread for screwing another of the external threads opposite to each other is formed at the end of the first joint metal fitting part opposite to the second joint metal fitting part, and the combining mechanism is constructed to include the rotating operating part, external threads opposite to each other and internal threads, it is conducive to simply constructing a pipe joint metal fitting with adjustable length.

[0032] In addition, if the locking mechanism for locking the total length of the first joint metal fitting part and the second joint metal fitting part in the adjusted state is constructed to include a lock nut screwed with external threads in opposite directions to each other, it is advantageous to simply construct the locking mechanism.

[0033] In addition, if the piping joint metal fitting is constructed to include a tubular connector sandwiched between a first joint metal fitting part and a second joint metal fitting part, an externally threaded tube with external threads in opposite directions are respectively protruded from the end of the second joint metal fitting part opposite to the first joint metal fitting part and the end of the first joint metal fitting part opposite to the second joint metal fitting part, a rotating operating part is provided on the outer periphery of the connector, and internal threads in opposite directions to each other that are screwed to the external threads are formed on the inner periphery on both sides of the length direction of the connector, and the combining mechanism is constructed to include an externally threaded tube and a connector, it is advantageous to simply construct a length-adjustable piping joint metal fitting.

[0034] In addition, if the locking mechanism for locking the total length of the first joint metal fitting part and the second joint metal fitting part in the adjusted state is constructed to include a lock nut screwed with external threads in opposite directions to each other, it is advantageous to simply construct the locking mechanism.

[0035] Furthermore, if the first joint metal part is constituted by a nozzle part connected to the device side, and the second joint metal part is constituted by a hose joint part to which a hose is connected, the distance between the device and the hose can be adjusted.

[0036] Furthermore, if the first joint metal part and the second joint metal part are constituted by hose joint parts to which hoses are connected, the distance between the hoses can be adjusted.

[0037] Furthermore, if the first joint metal fitting part and the second joint metal fitting part are constituted by a nozzle part connected to the device side, the distance between the devices can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a diagram showing the maximum elongated state in a side view after a part of the pipe joint metal fitting according to the first embodiment is broken.

[0039] Figure 2 This is a side view showing the pipe joint metal fitting of the first embodiment in a minimally shortened state in a side view after partial breakage.

[0040] Figure 3 This is an exploded view of the pipe joint fitting according to the first embodiment.

[0041] Figure 4 This is a side view of a pipe joint metal fitting according to the second embodiment in which a part is broken off.

[0042] Figure 5 This is a side view of a pipe joint metal fitting according to a third embodiment in which a part is broken off.

[0043] Figure 6It is an exploded view of the pipe joint metal fitting according to the third embodiment.

[0044] Figure 7 This is a side view of a pipe joint metal fitting according to Modification Example 1 of the third embodiment, in which a part is broken off.

[0045] Figure 8 This is a side view of a pipe joint metal fitting according to Modification Example 2 of the third embodiment, in which a part is broken off.

[0046] Fig. 9 It is a side view of a pipe joint metal fitting according to a fourth embodiment in which a part is broken off.

[0047] Fig.10 It is an exploded view of the pipe joint metal fitting according to the fourth embodiment.

[0048] Fig.11 This is a side view of a pipe joint metal fitting according to Modification Example 1 of the fourth embodiment, in which a part is broken off.

[0049] Fig.12 This is a side view of a pipe joint metal fitting according to Improved Example 2 of the fourth embodiment, in which a part is broken off. DETAILED DESCRIPTION

[0050] (First Embodiment)

[0051] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0052] like Figure 3 As shown, the pipe joint metal fitting 10A includes a first joint metal fitting portion 12 , a second joint metal fitting portion 14 , and a lock nut 16 , and connects a fluid passage R provided through each of the first joint metal fitting portion 12 and the second joint metal fitting portion 14 .

[0053] The first joint metal fitting portion 12 , the second joint metal fitting portion 14 and the lock nut 16 are separately constructed.

[0054] In addition, if Figure 1 , 2 As shown, the piping joint metal fitting 10A has a coupling mechanism 18, which couples the first joint metal fitting part 12 and the second joint metal fitting part 14 in a manner that can adjust the distance between the first joint metal fitting part 12 and the second joint metal fitting part 14 when the fluid channel R inside the first joint metal fitting part 12 and the second joint metal fitting part 14 is connected.

[0055] Furthermore, the pipe joint metal fitting 10A includes a locking mechanism 20 that locks the distance between the first joint metal fitting portion 12 and the second joint metal fitting portion 14 in the adjusted state.

[0056] In the piping joint metal fitting 10A of the present embodiment, the first joint metal fitting part 12 is composed of a nozzle part 22A connected to the equipment side, and the second joint metal fitting part 14 is composed of a hose joint part 24A to which the hose end is connected. The piping joint metal fitting 10A of the present embodiment will appropriately supply the fluid flowing in the hose to the equipment, or appropriately discharge it from the equipment.

[0057] The pipe joint metal fitting 10A is made of metal such as mild steel, for example, STKM (carbon steel pipe for machine structure), free-cutting steel, carbon steel, aluminum, brass, stainless steel, etc. In addition, the pipe joint metal fitting 10 is subjected to surface treatment such as chromate treatment in order to improve corrosion resistance or suppress adhesion of dirt.

[0058] The nozzle portion 22A is configured by coaxially arranging a cylindrical portion 26 and a nozzle-side nut portion 28A in the axial direction thereof, and a fluid passage R is formed through the insides of the cylindrical portion 26 and the nozzle-side nut portion 28A.

[0059] The barrel 26 is a cylindrical component that is detachably connected to the device, and has an external thread 2602 formed on its outer periphery so that it can be installed on the device. It should be noted that the structure of the barrel 26 can apply various structures known in the past as long as it can be installed on the device.

[0060] The nozzle-side nut portion 28A is a hexagonal nut and is provided adjacent to the cylinder portion 26 .

[0061] In addition, an internal thread 2802 that can be screwed onto the external threaded tube 32 of the hose joint part 24A is formed on the inner circumferential surface of the end of the nozzle part 22A (the first joint metal part 12) opposite to the hose joint part 24A (the second joint metal part 14), that is, the end of the nozzle side nut part 28A opposite to the barrel part 26.

[0062] In addition, an annular groove 2204 is formed on the inner peripheral surface 2202 of the nozzle portion 22A forming the fluid passage R, and an O-ring 30 is fitted into the annular groove 2204. The O-ring 30 of the present embodiment is provided adjacent to the internal thread 2802.

[0063] The hose joint portion 24A is composed of a male threaded tube 32, a joint-side nut portion 34A, a flange portion 36, and a cylindrical portion 38 coaxially arranged in its axial direction, and a fluid passage R is formed therein through them similarly to the nozzle portion 22A.

[0064] The joint nut portion 34A is hexagonal and is disposed in the middle of the hose joint portion 24A in the axial direction. It should be noted that the joint nut portion 34A may be replaced arbitrarily, such as being disposed as a large diameter portion consisting of a circumferential surface.

[0065] The flange portion 36 is provided adjacent to the joint-side nut portion 34A, and a groove portion 3602 for mounting a sleeve (not shown) is formed between the flange portion 36 and the joint-side nut portion 34A.

[0066] The sleeve (not shown) is cylindrical and is provided on the radially outer side of the cylindrical portion 38 . The sleeve is attached to the hose joint portion 24A by riveting a mounting portion located at an axial end portion to the groove portion 3602 .

[0067] The cylindrical portion 38 is a portion inserted into the inner peripheral surface of the hose. The cylindrical portion 38 is provided to protrude from the flange portion 36, and the flange portion 36 can abut against the end portion thereof when the hose is inserted.

[0068] A plurality of locking concave-convex portions 3802 extending in the circumferential direction are formed on the outer peripheral surface of the cylindrical portion 38 at intervals in the axial direction.

[0069] When a sleeve is installed on the hose joint portion 24A, an annular space for inserting the hose end is formed between the outer periphery of the cylindrical portion 38 and the inner periphery of the sleeve. The hose end is integrally installed on the hose joint portion 24A by inserting the hose into the annular space and riveting the sleeve using a riveting device.

[0070] Alternatively, the sleeve may not be attached to the hose joint portion 24A, but the tubular portion 38 may be inserted into the hose end portion and the hose may be fastened with a band, thereby attaching the hose end portion to the hose joint portion 24A.

[0071] The external threaded tube 32 protrudes from the end of the hose joint portion 24A (the second joint metal fitting portion 14 ) opposite to the nozzle portion 22A (the first joint metal fitting portion 12 ), that is, from the end of the joint-side nut portion 34A on the opposite side from the flange portion 36 .

[0072] The external threaded pipe 32 is cylindrical, and an external thread 3202 that can be screwed to the internal thread 2802 is formed on the outer peripheral portion of the joint-side nut portion 34A side.

[0073] The front end outer peripheral surface 3204 of the male threaded tube 32 located on the front end side is formed of a smooth surface without irregularities, and the outer diameter of the front end outer peripheral surface 3204 is formed to a size capable of being inserted into the inner peripheral surface 2202 of the nozzle portion 22A.

[0074] Figure 1 The following state is shown in the figure: the external thread 3202 and the internal thread 2802 are slightly screwed together, and the pipe joint metal fitting 10A is stretched to the maximum in the axial direction of the nozzle part 22A and the axial direction of the hose connector part 24A, that is, the axial direction of the pipe joint metal fitting 10A. In other words, the pipe joint metal fitting 10A is shown in the state where the length is the largest. In addition, Figure 2The following state is shown in the figure: the external thread 3202 and the internal thread 2802 are screwed together to the maximum extent, and the pipe joint metal fitting 10A is shortened to the shortest in the axial direction of the pipe joint metal fitting 10A. In other words, the pipe joint metal fitting 10A is shown in the state with the shortest length.

[0075] That is, the length of the pipe fitting 10A in the axial direction, that is, the length of the pipe fitting 10A can be adjusted within a range in which the male thread 3202 and the female thread 2802 can be screwed together.

[0076] like Figure 1 , 2 As shown, the locking nut 16 is screwed onto the externally threaded tube 32. Specifically, the external thread 3202 of the externally threaded tube 32 is screwed onto the internal thread 1602 formed on the locking nut 16.

[0077] The coupling mechanism 18 for coupling the nozzle portion 22A and the hose coupling portion 24A according to the present embodiment is configured to include the externally threaded tube 32 and the internal thread 2802 .

[0078] Furthermore, the lock mechanism 20 of the present embodiment is configured to include the lock nut 16 .

[0079] Next, a method of connecting the nozzle portion 22A (first joint metal portion 12 ) and the hose joint portion 24A (second joint metal portion 14 ) will be described.

[0080] When the nozzle 22A is connected to the hose joint 24A, the lock nut 16 is first screwed onto the external thread 3202 of the external threaded tube 32 of the hose joint 24A so that it is located near the joint-side nut 34A.

[0081] Next, the externally threaded tube 32 of the hose joint portion 24A is made to face the nozzle-side nut portion 28A of the nozzle portion 22A, and the axial directions of the nozzle portion 22A and the hose joint portion 24A are aligned.

[0082] Then, after the front end of the external threaded tube 32 of the hose joint part 24A is inserted into the nozzle part 22A, the O-ring 30 is elastically connected to the front end outer peripheral surface 3204, and the front end outer peripheral surface 3204 and the inner peripheral surface 2202 of the nozzle part 22A are sealed by the O-ring 30 to prevent fluid leakage between the nozzle part 22A and the hose joint part 24A.

[0083] In addition, sealing refers to a state of having liquid-tightness to prevent leakage of liquid such as oil.

[0084] Insert the external threaded tube 32 into the nozzle part 22A. After the external thread 3202 of the external threaded tube 32 reaches the internal thread 2802 of the nozzle part 22A, operate the joint side nut part 34A to rotate the hose joint part 24A around the axis so that the external thread 3202 and the internal thread 2802 are properly screwed together.

[0085] After the external thread 3202 and the internal thread 2802 are properly screwed together, the nozzle portion 22A is connected to the equipment, and the hose is installed on the hose connector portion 24A.

[0086] Then, the joint side nut portion 34A is operated to rotate the hose joint portion 24A, and after adjusting the total length of the nozzle portion 22A and the hose joint portion 24A, the lock nut 16 is reversely rotated back to the position abutting against the nozzle portion 22A, thereby fixing the piping joint metal fitting 10A to the desired length.

[0087] In this embodiment, the total length of the nozzle portion 22A and the hose connector portion 24A can be adjusted within the range of the screw connection between the external thread 3202 and the internal thread 2802. Thus, the distance from the device to the hose can be adjusted to a desired length.

[0088] Thus, according to the pipe fitting 10A of the first embodiment, since the coupling mechanism 18 is provided, the coupling mechanism 18 couples the nozzle 22A and the hose connector 24A in a manner that the total length of the nozzle 22A and the hose connector 24A can be adjusted while the insides of the separated nozzle 22A (first nozzle fitting part 12) and the hose connector 24A (second nozzle fitting part 14) are connected, so that the length of the pipe fitting 10A can be adjusted, thereby contributing to suppressing damage to the connected pipe and avoiding an increase in the number of working hours and cost during assembly. In addition, by releasing the coupling of the coupling mechanism 18, the nozzle 22A and the hose connector 24A can be separated, which contributes to improving convenience.

[0089] Furthermore, since the locking mechanism 20 is provided to lock the total length of the nozzle portion 22A and the hose coupling portion 24A in the adjusted state, the pipe joint metal fitting 10A can be fixed at a desired length, which is advantageous in preventing the connected pipe from being damaged.

[0090] In addition, since an external threaded tube 32 is protrudingly provided at the end of the hose joint portion 24A opposite to the nozzle portion 22A, an internal thread 2802 that can be screwed to the external threaded tube 32 is formed at the end of the nozzle portion 22A opposite to the hose joint portion 24A, and the connecting mechanism 18 is constructed to include the external threaded tube 32 and the internal thread 2802, it is beneficial to simply construct a length-adjustable piping joint metal fitting 10A.

[0091] Furthermore, since the locking mechanism 20 is configured to include the lock nut 16 threadedly connected to the externally threaded pipe 32 , it is advantageous in that the locking mechanism 20 can be configured simply.

[0092] Furthermore, since the first joint metal part 18 is composed of the nozzle part 22A connected to the device side and the second joint metal part 14 is composed of the hose joint part 24A to which the hose is connected, the distance between the device and the hose can be adjusted.

[0093] (Second Embodiment)

[0094] Reference Figure 4 A pipe joint metal fitting 10B according to the second embodiment will be described.

[0095] In the first embodiment, the nozzle portion 22A is provided with an internal thread 2802, and the hose connector portion 24A is provided with an external thread 3202. In contrast, in the second embodiment, the nozzle portion 22B is provided with an external thread 4002, and the hose connector portion 24B is provided with an internal thread 3402. The two embodiments differ in this respect.

[0096] In the following description of the embodiment, the same reference numerals are used for the same parts and components as those of the first embodiment, and the description thereof is omitted, while the parts different from the first embodiment are mainly described.

[0097] In the pipe joint metal fitting 10B of the present embodiment, the first joint metal fitting portion 12 is constituted by a nozzle portion 22B connected to the equipment side, and the second joint metal fitting portion 14 is constituted by a hose joint portion 24B to which a hose end portion is connected.

[0098] The nozzle portion 22B is configured such that the cylindrical portion 26 , the nozzle-side nut portion 28B, and the externally threaded tube 40 are coaxially arranged in the axial direction thereof, and a fluid passage R is formed through the insides thereof.

[0099] The nozzle-side nut portion 28B has a hexagonal column shape and is provided adjacent to the cylinder portion 26 .

[0100] The external threaded tube 40 protrudes from the end of the nozzle portion 22B (first joint metal portion 12 ) opposite to the hose joint portion 24B (second joint metal portion 14 ), that is, from the end of the nozzle-side nut portion 28B on the opposite side from the barrel portion 26 .

[0101] The externally threaded pipe 40 is cylindrical, and an external thread 4002 that can be screwed to the internal thread 3402 of the joint-side nut portion 34B is formed on the outer peripheral portion on the nozzle-side nut portion 28B side.

[0102] The front end outer peripheral surface 4004 of the male threaded tube 40 located on the front end side is formed of a smooth surface without irregularities, and the outer diameter of the front end outer peripheral surface 4004 is formed to a size capable of being inserted into the inner peripheral surface 2402 of the hose connector 24B.

[0103] The locking nut 16 is screwed onto the externally threaded tube 40. Specifically, the external thread 4002 of the externally threaded tube 40 is screwed onto the internal thread 1602 formed on the locking nut 16 (see Figure 3 )Screw-on.

[0104] The hose joint portion 24B is configured by coaxially arranging a joint-side nut portion 34B, a flange portion 36, and a cylindrical portion 38 in the axial direction thereof, and a fluid passage R is formed therein through them similarly to the nozzle portion 22B.

[0105] The joint-side nut portion 34B is a hexagonal nut, and the intervening groove portion 3602 is provided adjacent to the flange portion 36 .

[0106] On the end of the hose joint portion 24B (the second joint metal fitting portion 14) opposite to the nozzle portion 22B (the first joint metal fitting portion 12), that is, on the inner circumferential surface of the end of the joint side nut portion 34B opposite to the flange portion 36, an internal thread 3402 that can be screwed onto the external threaded tube 40 of the nozzle portion 22B is formed.

[0107] In addition, an annular groove 2404 is formed on the inner peripheral surface 2402 of the hose joint portion 24B forming the fluid passage R, and an O-ring 30 is fitted into the annular groove 2404. The O-ring 30 of the present embodiment is provided adjacent to the internal thread 3402.

[0108] The external thread 4002 of the piping joint metal fitting 10B is provided on the nozzle portion 22B, and the internal thread 3402 is provided on the hose joint portion 24B. The method of combining the nozzle portion 22B (first joint metal fitting portion 12) and the hose joint portion 24B (second joint metal fitting portion 14) is the same as that of the first embodiment.

[0109] The pipe joint metal fitting 10B of the second embodiment can also produce the same effects as those of the first embodiment.

[0110] In the above-mentioned first embodiment, the external thread 3202 formed on the hose joint portion 24A is screwed together with the internal thread 2802 formed on the nozzle portion 22A, so that the nozzle portion 22A is combined with the hose joint portion 24A. In the second embodiment, the external thread 4002 formed on the nozzle portion 22B is screwed together with the internal thread 3402 formed on the hose joint portion 24B, so that the nozzle portion 22B is combined with the hose joint portion 24B, and the first joint metal fitting portion 12 and the second joint metal fitting portion 14 can also be other combinations.

[0111] Specifically, for example, the first joint metal fitting part and the second joint metal fitting part are both hose joint parts, and the two hose joint parts are connected by screwing the external thread formed on one hose joint part with the internal thread formed on the other hose joint part, thereby adjusting the distance between the hoses.

[0112] In addition, for example, the first joint metal fitting part and the second joint metal fitting part are both nozzles, and the two nozzles are connected by screwing the external thread formed on one nozzle part with the internal thread formed on the other nozzle part. In this way, the distance between the devices can be adjusted.

[0113] In this way, according to the piping joint metal fittings 10A and 10B of this embodiment, by changing the combination of the first joint metal fitting part 12 and the second joint metal fitting part 14 depending on the purpose, the equipment and the hose, the hose and the hose, or the equipment and the equipment can be connected in a state where the length of the piping joint metal fittings can be adjusted, which is beneficial to improving convenience.

[0114] (Third Embodiment)

[0115] Reference Figure 5 , 6 A pipe joint metal fitting 10C according to a third embodiment will be described.

[0116] In the first embodiment, the external thread 3202 formed on the hose connector portion 24A is screwed together with the internal thread 2802 formed on the nozzle portion 22A, so that the nozzle portion 22A is combined with the hose connector portion 24A, while in the third embodiment, the nozzle portion 22A and the hose connector portion 24B are combined via a connector 42 provided between the nozzle portion 22A and the hose connector portion 24B. The two embodiments differ in this point.

[0117] The pipe joint metal fitting 10C includes a first joint metal fitting portion 12, a second joint metal fitting portion 14, a connector 42, and lock nuts 16A and 16B. Figure 6 As shown, they are constructed separately.

[0118] In the pipe joint metal fitting 10C of the present embodiment, the first joint metal fitting portion 12 is constituted by a nozzle portion 22A connected to the equipment side, and the second joint metal fitting portion 14 is constituted by a hose joint portion 24B to which a hose end portion is connected.

[0119] The connector 42 has a cylindrical shape and is interposed between the nozzle portion 22A and the hose joint portion 24B.

[0120] A hexagonal column-shaped rotation operation portion 44 for rotating the connector 42 is provided on the outer periphery of the middle portion in the longitudinal direction (axial direction) of the adapter 42 .

[0121] External threads 4202 and 4204 are formed on the outer peripheral portion of both sides in the longitudinal direction of the connector 42 in opposite directions.

[0122] Specifically, the external threads 4202 and 4204 are formed on both sides in the longitudinal direction of the connector 42 and on the outer peripheral portion on the rotation operation portion 44 side.

[0123] In addition, the end outer peripheral surfaces 4206 and 4208 of the connector 42 located at both ends in the longitudinal direction are formed of smooth surfaces without irregularities.

[0124] The outer diameter of the end outer peripheral surface 4206 is formed to be inserted into the inner peripheral surface 2202 of the nozzle portion 22A, and the outer diameter of the end outer peripheral surface 4208 is formed to be inserted into the inner peripheral surface 2402 of the hose connector portion 24B.

[0125] like Figure 5 As shown, a locking nut 16A is screwed onto one external thread 4202 , and a locking nut 16B is screwed onto the other external thread 4204 .

[0126] The nozzle portion 22A of this embodiment is configured in the same manner as the nozzle portion 22A of the first embodiment, and the hose joint portion 24B is configured in the same manner as the hose joint portion 24B of the second embodiment.

[0127] In this embodiment, an internal thread 2802 for screwing onto an external thread 4202 of the connector 42 is formed at the end of the nozzle portion 22A opposite to the hose connector portion 24B, and an internal thread 3402 for screwing onto another external thread 4204 is formed at the end of the hose connector portion 24B opposite to the nozzle portion 22A.

[0128] Specifically, in this embodiment, an internal thread 2802 that can be screwed onto the external thread 4202 of the connector 42 is formed on the inner circumferential surface of the end of the nozzle portion 22A opposite to the hose joint portion 24B, that is, the end of the nozzle side nut portion 28A opposite to the barrel portion 26.

[0129] In addition, an annular groove 2204 is formed on the inner peripheral surface 2202 of the nozzle portion 22A forming the fluid passage R, and an O-ring 30 is fitted into the annular groove 2204. The O-ring 30 of the present embodiment is provided adjacent to the internal thread 2802.

[0130] In addition, in this embodiment, an internal thread 3402 that can be screwed onto the external thread 4204 of the connector 42 is formed on the inner circumferential surface of the end of the hose joint portion 24B opposite to the nozzle portion 22A, that is, the end of the joint side nut portion 34B opposite to the flange portion 36.

[0131] In addition, an annular groove 2404 is formed on the inner peripheral surface 2402 of the hose joint portion 24B forming the fluid passage R, and an O-ring 30 is fitted into the annular groove 2404. The O-ring 30 of the present embodiment is provided adjacent to the internal thread 3402.

[0132] The coupling mechanism 18 for coupling the nozzle portion 22A and the hose coupling portion 24B in the present embodiment includes a rotation operation portion 44 , and external threads 4202 , 4204 and internal threads 2802 , 3402 that are opposite to each other.

[0133] Furthermore, the lock mechanism 20 of the present embodiment is configured to include the lock nuts 16A and 16B.

[0134] Next, a method of connecting the nozzle portion 22A (first joint metal portion 12 ) and the hose joint portion 24B (second joint metal portion 14 ) will be described.

[0135] When combining the nozzle portion 22A and the hose connector portion 24B, first screw the locking nut 16A onto the external thread 4202 of the connector 42 and screw the locking nut 16B onto the external thread 4204 of the connector 42 so that the locking nuts 16A and 16B are located near the rotating operating portion 44.

[0136] Next, one end portion 42A of the connector 42 is made to face the nozzle-side nut portion 28A of the nozzle portion 22A, and the axial directions of the connector 42 and the nozzle portion 22A are aligned.

[0137] Then, after one end 42A of the connector 42 is inserted into the nozzle portion 22A, the O-ring 30 is elastically connected to the outer peripheral surface 4206 of the end, and the outer peripheral surface 4206 of the end and the inner peripheral surface 2202 of the nozzle portion 22A are sealed by the O-ring 30 to prevent fluid leakage between the nozzle portion 22A and one end 42A of the connector 42.

[0138] Insert one end 42A of the connector 42 into the nozzle part 22A. After the external thread 4202 reaches the internal thread 2802 of the nozzle part 22A, operate the nozzle side nut part 28A to rotate the nozzle part 22A around the axis so that the external thread 4202 and the internal thread 2802 are properly screwed together.

[0139] Furthermore, the other end portion 42B of the connector 42 is made to face the joint-side nut portion 34B of the hose joint portion 24B, and the axial directions of the connector 42 and the hose joint portion 24B are aligned.

[0140] Then, after the other end 42B of the connector 42 is inserted into the interior of the hose joint portion 24B, the O-ring 30 is elastically connected to the outer peripheral surface 4208 of the end portion, and the outer peripheral surface 4208 of the end portion and the inner peripheral surface 2402 of the hose joint portion 24B are sealed by the O-ring 30 to prevent fluid leakage between the hose joint portion 24B and the connector 42.

[0141] Insert the other end 42B of the connector 42 into the hose connector 24B. After the external thread 4204 reaches the internal thread 3402 of the hose connector 24B, operate the connector side nut 34B to rotate the hose connector 24B around the axis so that the external thread 4204 and the internal thread 3402 are properly screwed together.

[0142] After the external thread 4202 is properly screwed into the internal thread 2802 and the external thread 4204 is properly screwed into the internal thread 3402, the nozzle portion 22A is connected to the equipment and the hose is installed on the hose connector portion 24B.

[0143] Then, the connector 42 is rotated by operating the rotation operation part 44, and the distance between the specific part of the nozzle part 22A and the specific part of the connector 42, and the distance between the specific part of the hose connector part 24B and the specific part of the connector 42 are adjusted to adjust the length of the pipe fitting 10C. For example, the distance between the end face of the nozzle side nut part 28A of the nozzle part 22A and the end face of the rotation operation part 44 of the connector 42, and the distance between the end face of the connector side nut part 34B of the hose connector part 24B and the end face of the rotation operation part 44 of the connector 42, which are opposite to each other, are adjusted. After the adjustment, the lock nut 16A is reversely rotated back to the position of contact with the nozzle part 22A, and the lock nut 16B is reversely rotated back to the position of contact with the hose connector part 24B, thereby fixing the pipe fitting 10C to a desired length.

[0144] In this embodiment, the length of the pipe joint metal fitting 10C can be adjusted within the range where the male thread 4202 is screwed to the female thread 2802 and the range where the male thread 4204 is screwed to the female thread 3402. Thus, the distance from the device to the hose can be adjusted to a desired length.

[0145] Thus, according to the pipe fitting 10C of the third embodiment, since the coupling mechanism 18 is provided, the coupling mechanism 18 couples the nozzle 22A and the hose connector 24B in a manner that allows the total length of the nozzle 22A and the hose connector 24B to be adjusted while the insides of the separated nozzle 22A (first nozzle fitting part 12) and the hose connector 24B (second nozzle fitting part 14) are connected, so that the length of the pipe fitting 10C can be adjusted, thereby contributing to suppressing damage to the connected pipe and avoiding an increase in the number of working hours and cost during assembly. In addition, by releasing the coupling of the coupling mechanism 18, the nozzle 22A and the hose connector 24B can be separated, contributing to improved convenience.

[0146] Furthermore, since the locking mechanism 20 is provided to lock the total length of the nozzle portion 22A and the hose coupling portion 24B in the adjusted state, the pipe joint metal fitting 10C can be fixed at a desired length, which is advantageous in preventing the connected pipe from being damaged.

[0147] In addition, since the pipe joint metal fitting 10C is constructed to include a cylindrical connector 42 sandwiched between the nozzle portion 22A and the hose joint portion 24B, a rotation operating portion 44 is provided on the outer periphery of the middle portion in the longitudinal direction of the connector 42, and external threads 4202 and 4204 are formed on the outer peripheries of both sides in opposite directions, an internal thread 2802 for screwing one external thread 4202 is formed at the end of the nozzle portion 22A opposite to the hose joint portion 24B, and an internal thread 3402 for screwing another external thread 4204 is formed at the end of the hose joint portion 24B opposite to the nozzle portion 22A, and the coupling mechanism 18 is constructed to include the rotation operating portion 44, external threads 4202 and 4204 in opposite directions and internal threads 2802 and 3402, it is advantageous to simply construct a pipe joint metal fitting 10C with adjustable length.

[0148] Furthermore, since the locking mechanism 20 is configured to include the lock nuts 16A and 16B screwed to the external threads 4202 and 4204 in opposite directions to each other, it is advantageous in that the locking mechanism 20 can be configured simply.

[0149] Furthermore, since the first joint metal part 12 is composed of the nozzle part 22A connected to the device side and the second joint metal part 14 is composed of the hose joint part 24B to which the hose is connected, the distance between the device and the hose can be adjusted.

[0150] (Modification Example 1 of the Third Embodiment)

[0151] Reference Figure 7 A pipe joint metal fitting 10D according to Modification Example 1 of the third embodiment will be described.

[0152] In the third embodiment, the nozzle portion 22A and the hose joint portion 24B are connected via the connector 42 , but the hose joint portions 24B may be connected to each other via the connector 42 .

[0153] like Figure 7 As shown, a pipe joint metal fitting 10D according to the present modified example 1 is obtained by replacing the nozzle portion 22A of the pipe joint metal fitting 10C according to the third embodiment with the hose joint portion 24B according to the third embodiment.

[0154] Therefore, in the pipe joint metal fitting 10D of this improved example, the first joint metal fitting part 12 and the second joint metal fitting part 14 are both composed of a hose joint part 24B for connecting a hose, and the pipe joint metal fitting 10D of this improved example supplies the fluid flowing in one hose to the other hose.

[0155] The pipe joint metal fitting 10D according to the first improved example can also produce the same effects as those of the third embodiment.

[0156] Furthermore, in the present modified example, since the first joint metal part 12 and the second joint metal part 14 are constituted by the hose joint part 24B to which the hose is connected, the distance between the hoses can be adjusted.

[0157] (Modification Example 2 of the Third Embodiment)

[0158] Reference Figure 8 A pipe joint metal fitting 10E according to a second modified example of the third embodiment will be described.

[0159] In the third embodiment, the nozzle portion 22A and the hose coupling portion 24B are connected via the connector 42 , but the nozzle portions 22A may be connected to each other via the connector 42 .

[0160] like Figure 8 As shown, a pipe joint metal fitting 10E of the present modified example 2 is obtained by replacing the hose joint portion 24B of the pipe joint metal fitting 10C of the third embodiment with the nozzle portion 22A of the third embodiment.

[0161] Therefore, in the pipe joint metal fitting 10E of this improved example, the first joint metal fitting part 12 and the second joint metal fitting part 14 are both composed of the nozzle part 22A connected to the device side, and the pipe joint metal fitting 10E of this improved example supplies the fluid discharged from one device to another device.

[0162] The pipe joint metal fitting 10E according to the second improved example can also produce the same effects as those of the third embodiment.

[0163] In addition, in this modified example, since the first joint metal part 12 and the second joint metal part 12 are composed of the nozzle part 22A connected to the device side, the distance between the devices can be adjusted.

[0164] By changing the combination of the first joint metal part 12 and the second joint metal part 14 according to the application as in the above-mentioned pipe joint metal parts 10C to 10E, it is possible to connect equipment and hoses, hoses and hoses, or equipment and equipment, which is advantageous in improving convenience.

[0165] (Fourth Embodiment)

[0166] Reference Fig. 9 , 10 A pipe joint metal fitting 10F according to a fourth embodiment will be described.

[0167] The structure of the connector 46 of the pipe joint metal fitting 10F of the fourth embodiment is different from that of the third embodiment.

[0168] That is, in the third embodiment, internal threads 2802 and 3402 are formed on the nozzle portion 22A and the hose connector portion 24B, and external threads 4202 and 4204 are formed on both sides of the connector 42. In contrast, in the fourth embodiment, internal threads 4602 and 4604 are formed on both sides of the connector 46, and external threads 4002 and 3202 are formed on the nozzle portion 22B and the hose connector portion 24A.

[0169] The pipe joint metal fitting 10F includes a first joint metal fitting portion 12, a second joint metal fitting portion 14, a connector 46, and lock nuts 16C and 16D. Fig.10 As shown, they are constructed separately.

[0170] In the pipe joint metal fitting 10F of the present embodiment, the first joint metal fitting portion 12 is constituted by a nozzle portion 22B connected to the equipment side, and the second joint metal fitting portion 14 is constituted by a hose joint portion 24A to which a hose end portion is connected.

[0171] The nozzle portion 22B of this embodiment is configured in the same manner as the nozzle portion 22B of the second embodiment, and the hose joint portion 24A is configured in the same manner as the hose joint portion 24A of the first embodiment.

[0172] In this embodiment, externally threaded pipes 40 and 32 having external threads 4002 and 3202 formed thereon in opposite directions protrude from the end of the nozzle portion 22B facing the hose joint portion 24A and the end of the hose joint portion 24A facing the nozzle portion 22B, respectively.

[0173] That is, externally threaded pipes 40 and 32 having external threads 4002 and 3202 formed thereon in opposite directions protrude from the end of the joint-side nut portion 34A opposite to the flange portion 36 and the end of the nozzle-side nut portion 28B opposite to the cylinder portion 26 , respectively.

[0174] The externally threaded pipe 40 is cylindrical, and an external thread 4002 that can be screwed to the internal thread 4602 of the connector 46 is formed on the outer peripheral portion on the nozzle-side nut portion 28B side.

[0175] The front end outer peripheral surface 4004 of the male threaded tube 40 located on the front end side is formed of a smooth surface without irregularities, and the outer diameter of the front end outer peripheral surface 4004 is formed to a size that can be inserted into the inner peripheral surface 4606 of the connector 46 .

[0176] The external threaded pipe 32 is cylindrical, and an external thread 3202 that can be screwed onto the internal thread 4604 is formed on the outer peripheral portion of the joint-side nut portion 34A side.

[0177] The front end outer peripheral surface 3204 of the male threaded tube 32 located on the front end side is formed of a smooth surface without irregularities, and the outer diameter of the front end outer peripheral surface 3204 is formed to a size that can be inserted into the inner peripheral surface 4606 of the connector 46 .

[0178] like Fig. 9 As shown, a locking nut 16C is screwed onto the external thread 4002 of the nozzle portion 22B, and a locking nut 16D is screwed onto the external thread 3202 of the hose connector portion 24A.

[0179] The connector 46 has a cylindrical shape and is interposed between the nozzle portion 22B and the hose joint portion 24A.

[0180] A rotation operation portion 48 for rotating the connector 46 is provided on the outer peripheral portion of the connector 46. The rotation operation portion 48 of the present embodiment is formed by an outer peripheral surface having a hexagonal cross section.

[0181] Internal threads 4602 and 4604 that are screwed to the external threads 4002 and 3202 and are in opposite directions to each other are formed on the inner circumference of both sides in the longitudinal direction of the connector 46 .

[0182] In addition, two annular grooves 4608 and 4610 are formed on the inner peripheral surface 4606 of the connector 46 forming the fluid passage R, and O-rings 30 are respectively fitted into the annular grooves 4608 and 4610. The O-rings 30 of this embodiment are respectively provided adjacent to the internal threads 4602 and 4604.

[0183] The coupling mechanism 18 for coupling the nozzle portion 22B and the hose coupling portion 24A according to the present embodiment is configured to include the externally threaded tubes 40 and 32 and the connector 46 .

[0184] Furthermore, the lock mechanism 20 of the present embodiment is configured to include the lock nuts 16C and 16D.

[0185] Next, a method of connecting the nozzle portion 22B (first joint metal portion 12 ) and the hose joint portion 24A (second joint metal portion 14 ) will be described.

[0186] When combining the nozzle portion 22B with the hose connector portion 24A, first screw the locking nut 16C onto the external thread 4002 of the nozzle portion 22B so that it is located near the nozzle side nut portion 28B, and screw the locking nut 16D onto the external thread 3202 of the hose connector portion 24A so that it is located near the connector side nut portion 34A.

[0187] Next, the externally threaded tube 40 of the nozzle portion 22B is made to face the one end portion 46A of the connector 46 , and the axial directions of the nozzle portion 22B and the connector 46 are aligned.

[0188] Then, after the external threaded tube 40 of the nozzle part 22B is inserted into the interior of the connector 46, the O-ring 30 is elastically connected to the front end outer peripheral surface 4004, and the front end outer peripheral surface 4004 and the inner peripheral surface 4606 of the connector 46 are sealed by the O-ring 30 to prevent fluid leakage between the nozzle part 22B and one end 46A of the connector 46.

[0189] After the external threaded pipe 40 is inserted into the connector 46 and the external thread 4002 reaches the internal thread 4602 of the connector 46, the nozzle side nut portion 28B is operated to rotate the nozzle portion 22B around the axis, so that the external thread 4002 and the internal thread 4602 are properly screwed together.

[0190] Furthermore, the externally threaded tube 32 of the hose joint portion 24A is made to face the other end portion 46B of the connector 46 , and the axial directions of the hose joint portion 24A and the connector 46 are aligned.

[0191] Then, after the external threaded tube 32 of the hose joint part 24A is inserted into the interior of the connector 46, the O-ring 30 is elastically connected to the front end outer peripheral surface 3204, and the front end outer peripheral surface 3204 and the inner peripheral surface 4606 of the connector 46 are sealed by the O-ring 30 to prevent fluid leakage between the hose joint part 24A and the connector 46.

[0192] After the external threaded tube 32 is inserted into the connector 46 and the external thread 3202 reaches the internal thread 4604 of the connector 46, the joint-side nut portion 34A is operated to rotate the hose joint portion 24A around the axis, thereby properly screwing the external thread 3202 and the internal thread 4604 together.

[0193] After the external thread 4002 is properly screwed into the internal thread 4602 and the external thread 3202 is properly screwed into the internal thread 4604, the nozzle portion 22B is connected to the equipment and the hose is installed on the hose connector portion 24A.

[0194] Then, the connector 46 is rotated by operating the rotation operation part 48, and the distance between the specific part of the nozzle part 22B and the specific part of the connector 46, and the distance between the specific part of the hose connector part 24A and the specific part of the connector 46 are adjusted to adjust the length of the pipe fitting 10F. For example, the distance between the end face of the nozzle side nut part 28B of the nozzle part 22B and the end face of the connector 46, and the distance between the end face of the connector side nut part 34A of the hose connector part 24A and the end face of the connector 46 are adjusted. After the adjustment, the lock nut 16C is reversely rotated to return to the position of contact with the nozzle part 22B, and the lock nut 16D is reversely rotated to return to the position of contact with the hose connector part 24A, thereby fixing the pipe fitting 10F to a desired length.

[0195] In this embodiment, the length of the pipe joint metal fitting 10F can be adjusted within the range of the screw connection between the male thread 4002 and the female thread 4602 and within the range of the screw connection between the male thread 3202 and the female thread 4604. Thus, the distance from the device to the hose can be adjusted to a desired length.

[0196] Thus, according to the fourth embodiment, the pipe fitting 10F is provided with the coupling mechanism 18, which couples the nozzle 22B and the hose connector 24A in a manner that allows the total length of the nozzle 22B and the hose connector 24A to be adjusted while the inside of the separated nozzle 22B (first nozzle metal part 12) and the hose connector 24A (second nozzle metal part 14) are connected, so that the length of the pipe fitting 10F can be adjusted, thereby contributing to suppressing damage to the connected pipe and avoiding an increase in the number of working hours and cost during assembly. In addition, by releasing the coupling of the coupling mechanism 18, the nozzle 22B and the hose connector 24A can be separated, which contributes to improving convenience.

[0197] Furthermore, since the locking mechanism 20 is provided to lock the total length of the nozzle portion 22B and the hose coupling portion 24A in the adjusted state, the pipe joint metal fitting 10F can be fixed at a desired length, which is advantageous in preventing the connected pipe from being damaged.

[0198] In addition, since the pipe joint metal fitting 10F is constructed to include a cylindrical connector 46 clamped between the nozzle portion 22B and the hose joint portion 24A, externally threaded tubes 40, 32 with external threads 4002, 3202 formed in opposite directions are respectively protruded from the end of the nozzle portion 22B opposite to the hose joint portion 24A and the end of the hose joint portion 24A opposite to the nozzle portion 22B, a rotating operating portion 48 is provided on the outer periphery of the connector 46, and internal threads 4602, 4604 in opposite directions to the external threads 4002, 3202 are formed on the inner periphery on both sides of the length direction of the connector 46, and the connecting mechanism 18 is constructed to include the externally threaded tubes 40, 32 and the connector 46, it is advantageous to simply construct a pipe joint metal fitting 10F with adjustable length.

[0199] In addition, since the locking mechanism 20 is configured to include the lock nuts 16C and 16D screwed with the external threads 4002 and 3202 in opposite directions to each other, it is advantageous to simply configure the locking mechanism 20.

[0200] Furthermore, since the first joint metal part 12 is composed of the nozzle part 22B connected to the device side and the second joint metal part 14 is composed of the hose joint part 24A to which the hose is connected, the distance between the device and the hose can be adjusted.

[0201] (Improvement Example 1 of the Fourth Embodiment)

[0202] Reference Fig.11 A pipe joint metal fitting 10G according to Modification Example 1 of the fourth embodiment will be described.

[0203] In the fourth embodiment, the nozzle portion 22B and the hose coupling portion 24A are connected via the connector 46 , but the hose coupling portions 24A may be connected to each other via the connector 46 .

[0204] like Fig.11 As shown, a pipe joint metal fitting 10G of the present modified example 1 is obtained by replacing the nozzle portion 22B of the pipe joint metal fitting 10F of the fourth embodiment with the hose joint portion 24A of the fourth embodiment.

[0205] Therefore, in the pipe joint metal fitting 10G of this improved example, the first joint metal fitting part 12 and the second joint metal fitting part 14 are both composed of a hose joint part 24A for hose connection, and the pipe joint metal fitting 10G of this improved example supplies the fluid flowing in one hose to the other hose.

[0206] The pipe joint metal fitting 10G of the present modified example 1 can also produce the same effects as those of the fourth embodiment.

[0207] Furthermore, in the present modified example, since the first joint metal part 12 and the second joint metal part 14 are constituted by the hose joint part 24A to which the hose is connected, the distance between the hoses can be adjusted.

[0208] (Modification Example 2 of the Fourth Embodiment)

[0209] Reference Fig.12 A pipe joint metal fitting 10H according to a second improved example of the fourth embodiment will be described.

[0210] In the fourth embodiment, the nozzle portion 22B and the hose coupling portion 24A are connected via the connector 46 , but the nozzle portions 22B may be connected to each other via the connector 46 .

[0211] like Fig.12 As shown, a pipe joint metal fitting 10H of the present modified example 2 is obtained by replacing the hose joint portion 24A of the pipe joint metal fitting 10F of the fourth embodiment with the nozzle portion 22B of the fourth embodiment.

[0212] Therefore, in the pipe joint metal fitting 10H of this improved example, the first joint metal fitting part 12 and the second joint metal fitting part 12 are both composed of the nozzle part 22B connected to the device side, and the pipe joint metal fitting 10H of this improved example supplies the fluid discharged from one device to another device.

[0213] The pipe joint metal fitting 10H according to the second improved example can also produce the same effects as those of the fourth embodiment.

[0214] Furthermore, in this modified example, since the first joint metal part 12 and the second joint metal part 14 are composed of the nozzle part 22B connected to the device side, the distance between the devices can be adjusted.

[0215] By changing the combination of the first joint metal part 12 and the second joint metal part 14 according to the application as in the above-mentioned pipe joint metal parts 10F to 10H, it is possible to connect equipment and hoses, hoses and hoses, or equipment and equipment, which is advantageous in improving convenience.

[0216] Description of Reference Numerals

[0217] 10A~10H: Pipe fittings

[0218] 12: First joint metal part

[0219] 14: Second joint metal part

[0220] 16, 16A~16D: Locking nut

[0221] 18: Combined institutions

[0222] 20: Locking mechanism

[0223] 22A, 22B: Mouthpiece

[0224] 24A, 24B: Hose connector

[0225] 26: Cylinder

[0226] 28A, 28B: Nut part on the nozzle side

[0227] 30: O-ring

[0228] 32, 40: External threaded pipe

[0229] 34A, 34B: Joint side nut

[0230] 36: Flange

[0231] 38: Cylindrical part

[0232] 42, 46: Connectors

[0233] 44, 48: Rotation operation unit

[0234] R: Fluid channel

Claims

1. A pipe joint metal fitting, comprising a first joint metal fitting portion and a second joint metal fitting portion and connecting a fluid channel, It is characterized in that A combining mechanism is provided for combining the first joint metal fitting part and the second joint metal fitting part in a manner capable of adjusting the total length of the first joint metal fitting part and the second joint metal fitting part when the first joint metal fitting part and the second joint metal fitting part are combined and internally connected.

2. The pipe joint metal fitting according to claim 1, It is characterized in that A locking mechanism is provided, which locks the total length of the first joint metal fitting part and the second joint metal fitting part in an adjusted state.

3. The pipe joint metal fitting according to claim 1, It is characterized in that An external threaded pipe is protrudingly provided at one end of the end of the second joint metal fitting part opposite to the first joint metal fitting part, or at one end of the end of the first joint metal fitting part opposite to the second joint metal fitting part, and an internal thread that can be screwed to the external threaded pipe is formed at the other end. The coupling mechanism is configured to include the externally threaded tube and the internal thread.

4. The pipe joint metal fitting according to claim 3, It is characterized in that A locking nut is screwed onto the external threaded pipe. A locking mechanism that locks the total length of the first joint metal fitting portion and the second joint metal fitting portion in an adjusted state is configured to include the lock nut.

5. The pipe joint metal fitting according to claim 1, It is characterized in that The pipe joint metal fitting is configured to include a cylindrical connector interposed between the first joint metal fitting portion and the second joint metal fitting portion. A rotating operation portion for rotating the connector is provided on the outer periphery of the middle portion in the longitudinal direction of the connector, and external threads in opposite directions are formed on the outer peripheries on both sides in the longitudinal direction of the connector. An internal thread for screwing one of the mutually opposite external threads is formed at the end of the second joint metal part opposite to the first joint metal part, and an internal thread for screwing the other of the mutually opposite external threads is formed at the end of the first joint metal part opposite to the second joint metal part, The coupling mechanism is configured to include the rotation operation portion, the external thread and the internal thread that are opposite to each other.

6. The pipe joint metal fitting according to claim 5, It is characterized in that The mutually opposite external threads are respectively screwed with locking nuts. A locking mechanism that locks the total length of the first joint metal fitting portion and the second joint metal fitting portion in an adjusted state is configured to include the lock nut.

7. The pipe joint metal fitting according to claim 1, It is characterized in that The pipe joint metal fitting is configured to include a cylindrical connector interposed between the first joint metal fitting portion and the second joint metal fitting portion. Externally threaded pipes having external threads in opposite directions are respectively provided protruding from the end of the second joint metal fitting part opposite to the first joint metal fitting part and the end of the first joint metal fitting part opposite to the second joint metal fitting part. A rotating operation portion for rotating the connector is provided on the outer periphery of the connector, and internal threads in opposite directions to each other and screwed to the external threads are formed on the inner periphery on both sides in the length direction of the connector. The coupling mechanism is configured to include the externally threaded pipe and the connector.

8. The pipe joint metal fitting according to claim 7, It is characterized in that The mutually opposite external threads are respectively screwed with locking nuts. A locking mechanism that locks the total length of the first joint metal fitting portion and the second joint metal fitting portion in an adjusted state is configured to include the lock nut.

9. The pipe joint metal fitting according to claim 1, It is characterized in that The first joint metal part is the nozzle part connected to the equipment side. The second joint metal fitting portion is a hose joint portion to which a hose is connected.

10. The pipe joint metal fitting according to claim 1, It is characterized in that The first joint metal fitting portion and the second joint metal fitting portion are hose joint portions to which a hose is connected.

11. The pipe joint metal fitting according to claim 1, It is characterized in that The first joint metal fitting part and the second joint metal fitting part are nozzle parts connected to the equipment side.

Images