TWI573948B - Fixed structure - Google Patents

Description

Pipe fixing structure

The present invention relates to a pipe fixing structure for preventing an elastically deformable pipe body such as a hose or a tube from being detached from a joint by a clip.

Conventionally, as such a tube fixing structure, a hose that is fitted to one end portion of a pipe and is fastened from the outer circumference by a small diameter is integrally provided with a circular fastening portion, which can be soft. The tube is fastened from the outer circumference; and the L-shaped hook extends in the axial direction from the axial end portion of the circular fastening portion and extends in the circumferential direction, wherein the horn nut provided on the pipe is provided with an L shape By inserting the L-shaped hooks into the L-shaped notches in the axial direction and then rotating them in the circumferential direction, the notches can be prevented from moving in the axial direction by card formation (see, for example, Patent Document 1).

Further, the present invention includes a clip portion in which a long strip-shaped plate material is bent in a C shape, and an engaging portion (an engaging hole, a rib rib, and a groove groove) is formed adjacent to the clip portion. The engaged portion (the engaging projection, the concave groove, the protruding rib) is disposed adjacent to the front end of the hose on the outer circumferential surface of the pipe into which the hose is inserted, wherein the engagement of the clip portion is achieved The engaging portion is engaged with the engaged portion of the pipe from the outer side in the radial direction, whereby the engaging portion and the engaged portion are fitted in the radial direction of the hose (see, for example, Patent Document 2).

Patent Document 1: Japanese Laid-Open Patent Publication No. 2010-169175

Patent Document 2: Japanese Laid-Open Patent Publication No. 2006-57798

From the beginning, a tube having a flexible hose or tube formed of an elastic material such as synthetic resin or rubber has the property that the inner diameter, the outer diameter, or the wall thickness are likely to cause dimensional errors during manufacture; When the outer circumference is fastened by a clip or the like, the elastic material of the fastening portion is compressed and deformed to cause the cutting of the clip or the like. The elastic material which is compressed and deformed by the cutting is retracted from the portion adjacent to the fastening portion to be deformed by the deformation; the thickness of the wall is reduced and the shape is reduced by the long-term use; and Slightly scratched and easily broken.

However, in the conventional pipe fixing structure, in the case of Patent Document 1, since the L-shaped hook and the L-shaped notch are combined and can be rotationally moved in the circumferential direction, the hose is rotated during use. When twisted, the L-shaped hook is displaced in the circumferential direction together with the hose, so that the engagement with the L-shaped notch is easily shifted.

In particular, when the worker does not sufficiently rotate the L-shaped hook in the circumferential direction and does not completely engage the L-shaped notch, the L-shaped hook is more easily displaced from the L-shaped notch. In this state, if the hose is stretched, the hose is detached from the pipe together with the clip, and there is a problem that the drop strength is lowered.

Further, in the case of Patent Document 2, the configuration is such that the outer peripheral surface of the hose is cut even with the fastening of the clip portion, or the diameter is reduced as the hose is changed over the years. Further, the clip portion is further deformed in diameter reduction, and the engaging portion is also supported by the engaged portion and is difficult to move in the radial direction. Therefore, the clip portion cannot be smoothly reduced in diameter, thereby the outer peripheral surface of the hose and the clip portion. A gap is formed between the inner peripheral faces, so that the fastening force is lowered.

In particular, when a hose having an outer diameter smaller than a standard specification due to a manufacturing error is used, it is easy to further generate a gap between the outer circumferential surface of the hose and the inner circumferential surface of the clip portion. In this state, if the hose is stretched, the hose is detached from between the clip portion and the pipe, and there is a problem that the drop strength is lowered.

Further, in the case of Patent Document 2, when the elastic material corresponding to the amount of the outer peripheral surface of the hose which is cut by the fastening of the clip portion is retracted from the portion adjacent to the fastening portion and is convexly deformed, the clip is clipped. The whole portion is inclined, so that there is also a problem that the engaging portion is easily displaced from the engaged portion.

The present invention has been made in an effort to solve such a problem, and an object thereof is to prevent scratching of the outer surface of a pipe body, and to reliably prevent seizure or the like with a simple structure regardless of whether the pipe body is reduced in diameter or not.

In order to achieve the object, the present invention comprises: a nipple inserted into a tube body that is elastically deformable; and a clip body that is placed between the nipple and the threaded tube and capable of being fastened along the fastening line The direction is elastically deformed; the operation portion for elastic deformation is provided on the clip body; and the hook is protruded from the clip body; the threaded pipe has an insertion portion inserted into the pipe body and is disposed in the insertion portion a locking end of the end, and an engagement groove provided on the opposite side of the insertion portion, and the hook has a locking direction in the axial direction as the clip body is deformed in the radial direction a front end surface of the bent portion is disposed on an axial extension line of an inner circumferential surface of the clip main body, and is disposed to sandwich a space portion in a radial direction between the locking hook and the engagement groove Relative.

According to the invention having the foregoing feature, even if the clip main body is moved along the outer surface of the tubular body into which the nipple is inserted, the front end surface of the bent portion does not come into contact with the outer surface of the tubular body. When the clip main body is held in a state in which the clip main body is expanded and deformed, the gripper body is moved toward the locking yoke of the nipple, and after the hook portion of the hook passes over the locking ridge in the axial direction, the diameter of the clip main body is released by the operation portion, whereby the clip body is elasticized. The reduced diameter is deformed, and the front end surface of the bent portion is deformed by the elastic reduction to enter the engagement groove of the nip, and the bent portion and the locking yoke are engaged with each other in the axial direction, and are prevented from moving. Thereafter, even if the tube body is cut into the outer surface of the clip body with respect to the outer surface of the tube body or The change is reduced in diameter and the bent portion is also moved inward in the radial direction along the locking cymbal to maintain the engagement state between the two.

Therefore, it is possible to prevent the outer surface of the pipe body from being scratched, and it is possible to surely achieve the detachment prevention with a simple configuration regardless of whether the pipe body is reduced in diameter or not.

As a result, the L-shaped hook and the L-shaped notch are rotatably moved in the conventional structure in the circumferential direction, or the clip portion is deformed by the diameter reduction of the hose. The engaging portion is supported by the engaged portion and is difficult to move inward in the radial direction, and if the portion adjacent to the fastening portion on the outer circumferential surface of the hose is deformed by the fastening of the clip portion, the clip portion is deformed. In the conventional structure in which the engaging portion is easily inclined from the engaged portion, it is possible to maintain excellent peeling strength over a long period of time as compared with the above-described two types of structures, and it is possible to prevent an accident caused by falling off of the tubular body.

A‧‧‧ tube body

A2‧‧‧ inner surface

1‧‧‧Threaded take over

11‧‧‧Inlay

11a‧‧‧ annular recess

12‧‧‧ card stop

12a‧‧‧Gap section

13‧‧‧ snap groove

2‧‧‧ Clip body

2a‧‧‧ inner circumference

2d‧‧‧End

3‧‧‧Operation Department

4‧‧‧ hook

41‧‧‧Flexing Department

41d‧‧‧ front face

41e‧‧‧Rotation space

16‧‧‧Ring seals

S‧‧‧Space Department

Fig. 1 is an explanatory view showing an overall configuration of a pipe fixing structure according to an embodiment of the present invention, wherein (a) is a front view, and (b) is a cross-sectional side along the line (1B)-(1B) of Fig. 1(a). The view, (c), is a front view of the 縦 section along the line (1C)-(1C) of Fig. 1(b).

Fig. 2 is a perspective view showing an exploded state, (a) is a perspective view of the whole, (b) is a perspective view of the clip viewed from the opposite direction, (c) is a perspective view showing the expanded state of the clip, and (d) is an enlarged diameter of the clip. A perspective view of the state viewed from the opposite direction.

Figure 3 is a perspective view and a side view showing a connection step of the pipe body with respect to the nipple, (a) a perspective view before the nipple is inserted into the pipe body, (b) a side view of the state, and (c) a thread Take a perspective view of the inserted tube, (d) is a side view of the state, (e) is a rotating clip The rear perspective view, (f) is a side view of the state.

Fig. 4 is a perspective view showing a modification of the clip in an enlarged manner.

Fig. 5 is an enlarged perspective view showing another modification of the clip in an enlarged manner.

Fig. 6 is a front cross-sectional view showing a modification of the nipple.

Fig. 7 is a front cross-sectional view showing another modification of the nipple.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIG. 1 to FIG. 5, in the pipe fixing structure according to the embodiment of the present invention, after the nipple 1 of the joint B is inserted into the joint end portion of the pipe body A, the pipe body is realized by the clamp C with respect to the nipple pipe 1. The anti-offer of the connecting end of A.

That is, after the joint B is inserted into the pipe body A, it is fixed (joined) by the clip C so that the pipe body A cannot move relative to the nip pipe 1 in the falling direction F thereof.

In detail, the pipe fixing structure according to the embodiment of the present invention has the following main components: the nipple 1 of the joint B is inserted into the elastically deformable pipe body A; the clip body 2 of the clip C is in contact with the nipple 1 The tube body A is interposed therebetween and is elastically deformable in the radial direction of the fastening; the operation portion 3 for elastic deformation is provided to the clip body 2; and the hook 4 is protruded from the clip body 2.

The tube body A is, for example, a hose or a tube formed of a flexible soft material such as a soft synthetic resin such as vinyl chloride, an anthrone rubber or another rubber, and the outer surface A1 and the inner surface A2 are preferably flat.

As a specific example of the pipe body A, as shown in FIGS. 1 to 3, a hose having a single-layer structure is used.

Moreover, although it is not shown in other examples, it can also be in the transparent or opaque outer layer. A laminated hose (woven hose) in which a plurality of or a single synthetic resin braided yarn (reinforced yarn) is spirally embedded is used as an intermediate layer between the inner layers; or a synthetic resin or a metal is used. A reinforcing material such as a rectangular reinforcing material having a rectangular cross section or a linear reinforcing material having a circular cross section or the like is spirally wound into a spiral reinforcing hose (Vohran hose) or a metal wire or a hard synthetic resin wire. A spiral reinforcing hose or the like which is spirally embedded is used as an intermediate layer.

The joint B has a nipple 1 on one end side in the axial direction thereof.

The nipple 1 is formed of a rigid material such as a metal such as brass or a hard synthetic resin that is not deformed, and has a substantially cylindrical shape having an outer diameter substantially the same as the inner diameter of the pipe body A, or by a pair of stainless steel or the like. The plate made of the deformed rigid material is formed into a cylindrical shape having a thin wall thickness by press working or other forming process.

Further, the outer peripheral surface of the nipple 1 has an insertion portion 11 inserted into the connection end portion of the pipe body A, a locking hook 12 formed at the end of the insertion portion 11, and a locking hook 12 interposed therebetween. The engagement groove 13 is provided in the side opposite to the axial direction of the insertion portion 11 (the insertion direction G in the opposite direction to the separation direction F).

The locking cymbal 12 protrudes in the radial direction from the outer peripheral surface of the nipple 1, and is formed in a ring shape, and has a notch portion 12a through which the buckling portion 41 (second dam side surface 12d) of the hook 4 to be described later passes in the axial direction. good. As shown in FIGS. 1 to 3, the notch portion 12a is preferably formed in a concave shape such that the bottom surface thereof is disposed shallower than the depth of the inner bottom surface of the engagement groove 13. Further, although not shown in the drawings, the bottom surface of the notch portion 12a may be formed in a concave shape so as to be shallower than the illustrated example, or the notch portion 12a may not be formed in a concave shape.

Further, it is preferable that at least one or more (singular or plural) notch portions 12a are partially formed in a concave shape in the circumferential direction of the locking weir 12.

The engagement groove 13 is formed adjacent to the locking weir 12 in the circumferential direction, and is set to be deeper than the amount of protrusion of the locking weir 12 and shallower than the outer peripheral surface of the threaded pipe 1.

The clip C has a clip main body 2 that is disposed to cover the outer periphery of the joint end portion of the pipe body A, an operation portion 3 for elastically deforming the clip main body 2, and at least one (singular or plural) are provided to the clip main body. 2 hooks 4 at one end of the shaft direction.

The clip main body 2 is formed by bending a strip of a metal or other elastic material having excellent elastic repulsive force such as spring steel in an annular shape, and has an inner peripheral surface 2a that is elastically deformable in the radial direction.

The operation portion 3 is provided at both ends or one end in the circumferential direction of the strip-shaped bent strip material of the clip main body 2, and is configured to move in the circumferential direction by biasing the operation portion 3 against the spring force of the clip main body 2. The annular band-shaped material is elastically deformed in the radial direction to expand the inner diameter of the clip body 2.

In the example shown in Figs. 1 to 3, the clip main body 2 and the hook 4 are integrally formed, so that the hook 4 can also be elastically deformed.

Further, although not shown in the other examples, the clip main body 2 and the hook 4 can be formed separately and integrated by welding or fixing. At this time, the hook 4 is also preferably formed of a material that can be elastically deformed.

When the diameter of the operation portion 3 is not reduced, as shown in FIGS. 2(a) and 2(b) and FIGS. 3(a) and 3(b), the inner diameter of the clip main body 2 is set to be substantially equal to or slightly smaller than The outer diameter of the pipe body A in the initial state in which the nipple 1 is inserted is not inserted. As shown in Figs. 1(a) to (c) and Figs. 3(e) and (f), in a state in which the outer circumference of the pipe body A in which the nipple 1 is inserted is placed, it is set to be smaller than the pipe body. The outer diameter of A, so as to be in the radial direction with the insert portion 11 The connecting end portion of the pipe body A is elastically fastened.

Further, when the diameter of the operation portion 3 is moved in the circumferential direction, as shown in Figs. 2(c) and 2(d) and Figs. 3(c) and 3(d), the inner diameter of the clip main body 2 is set to be larger than The outer diameter of the pipe body A in the initial state in which the nipple 1 is not inserted is even larger than the outer diameter of the pipe body A into which the nipple 1 is inserted. Thereby, a gap is formed between the inner circumferential surface 2a of the clip main body 2 and the outer surface A1 of the pipe body A into which the nipple 1 is inserted, so that the outer surface A1 of the pipe body A into which the nipple 1 is inserted can be made The clip main body 2 of the clip C is freely movable in the axial direction and the circumferential direction.

As a specific example of the clip C, as shown in FIG. 1 to FIG. 5, the pair of operation portions 3 are individually bent at both ends in the circumferential direction of the strip-shaped bent material which is the clip main body 2. The through hole 2b formed from one end portion of the strip in the circumferential direction over one operation portion 3 and the other end portion in the circumferential direction of the strip material are formed integrally with the other operation portion 3 and in the through hole 2b The movable portion 2c that is movable in the circumferential direction.

When the diameter is not reduced by the operation of the operation unit 3, as shown in FIGS. 2(a) and 2(b) and FIGS. 3(a) and 3(b), the through hole 2b and the movable portion 2c are arranged in the axial direction. The upper portions overlap each other, and the operation portions 3 are separated from each other. As shown in FIGS. 2(c) and 2(d) and FIGS. 3(c) and 3(d), the two operation portions 3 are sandwiched by a tool, a finger, or the like, and moved closer to each other, whereby the movable portion 2c can be The inside of the through hole 2b smoothly moves, and the amount of overlap with the through hole 2b is reduced to expand the diameter. Further, it is configured to release the grip of the operation portion 3 from the expanded diameter state and to reduce the diameter by the spring force of the clip body 2.

Further, although not shown in the drawings, the operation portion 3 may be formed only at one end in the longitudinal direction of the strip material of the clip main body 2, or the shape of the through hole 2b, the movable portion 2c, or the operation portion 3 may be changed.

The singular number or the plurality of hooks 4 are integrally formed so as to protrude in the axial direction and the radial direction at a portion of the end portion of the clip main body 2 in the circumferential direction, or are integrally fixed. The hook 4 extends in the radial direction along the locking weir 12 of the nipple 1, and has a bent portion 41 that can pass the locking weave 12 in the axial direction in accordance with the deformation of the clip body 2 in the radial direction.

The bent portion 41 has a first protruding portion 41a extending outward in the radial direction along the first meandering side surface 12b of the locking weir 12, and is axially oriented from the front end of the first protruding portion 41a along the outer surface 12c of the locking weir 12 The extended tubular portion 41b and the second projection 41c extending from the distal end of the tubular portion 41b toward the second side surface 12d of the locking collar 12 toward the engagement groove 13 of the nipple 1 in the radial direction.

The second projection 41c of the bent portion 41 is set in the axial direction along with the movement in the axial direction with respect to the outer surface A1 of the tubular body A into which the nipple 1 is inserted by the diameter expansion deformation of the clip main body 2. The locking hook 12 is passed over and the locking body 13 is deformed by the reduced diameter of the clip body 2 thereafter.

Further, the second projection 41c of the bent portion 41 has a front end surface 41d that faces the inner bottom surface of the engagement groove 13 of the nipple 1 in the radial direction. The front end surface 41d of the second projection 41c is disposed such that the second projection 41c enters the engagement groove 13 of the nipple 1 in accordance with the reduction in the diameter of the clip main body 2, and the engagement 锷 12 and the engagement are engaged. The grooves 13 are opposed to each other across the space portion S in the radial direction.

In the example shown in FIGS. 2( a ) to 2 ( d ), the distal end surface 41 d of the second projection 41 c is disposed substantially in the same axial direction as the inner circumferential surface 2 a of the clip main body 2 .

Further, although not shown in the drawings, the distal end surface 41d of the second projection portion 41c may be disposed in a concave shape in the radial direction from the axial extension line of the inner circumferential surface 2a of the clip main body 2.

The space portion S includes a first space S1 that is divided between the cylindrical portion 41b of the bent portion 41 and the outer surface 12c of the locking weir 12, and a second protruding portion 41c and the engaging groove 13 at the bent portion 41. The second space S2 is divided between the inner bottom surfaces. When the pipe body A is fastened and deformed by the clip main body 2 and the insertion portion 11 of the nipple 1, the cylindrical portion 41b of the bent portion 41 faces the outer surface 12c of the locking weave 12 in conjunction therewith. At the same time, the second protrusion 41c of the bent portion 41 approaches the inner bottom surface of the engagement groove 13, so that the second protrusion 41c of the bent portion 41 can be made to be along the second meandering side 12d of the locking catch 12 in the radial direction. Move inside.

Further, in the flexing portion 41, a rotation space 41e having a width wider than the locking cymbal 12 of the nipple 1 in the axial direction is formed between the first projection 41a and the second projection 41c, and the second projection 41c is caused It is preferable that the second side surface 12d of the locking hook 12 and the engaging groove 13 are rotationally moved.

Further, in the pipe fixing structure according to the embodiment of the present invention, a method of connecting the pipe body A to the joint B will be described in order of steps.

First, in the initial state shown in Fig. 3 (a), after the pipe body A is inserted into the clip main body 2 of the clip C, the nipple 1 of the joint B is inserted into the joint end portion of the pipe body A. In the example shown in Fig. 3 (a), the nipple 1 of the joint B is pressed into the joint end portion of the pipe body A in the inserting direction G.

In this initial state, as shown in FIG. 3(b), the operation portion 3 of the clip C is not moved, and thus the clip main body 2 is reduced in diameter. At this time, when the inner diameter of the clip main body 2 is set to be substantially the same as the outer diameter of the pipe body A, the inner circumferential surface 2a of the clip main body 2 slides along the outer surface A1 of the pipe body A, so that the clip C can be smoothly inserted. .

Further, when the inner diameter of the clip main body 2 is set to be slightly smaller than the outer diameter of the pipe body A, the operation portion 3 of the clip C is moved closer to deform the diameter of the clip main body 2, whereby the clip main body 2 is A gap is formed between the inner peripheral surface 2a and the distal end surface 41d of the bent portion 41 and the outer surface A1 of the tubular body A, so that the clip C can be smoothly inserted.

Next, as shown in FIGS. 3(c) and 3(d), the clip main body 2 is held in a state in which the clip main body 2 is expanded and deformed by the operation portion 3 of the clip C, so that the clip main body 2 and the hook 4 are close to the locking hook 12 of the nipple 1. The manner is moved in the insertion direction G, whereby the bent portion 41 (second projection 41c) of the hook 4 is passed over the locking weave 12 in the axial direction.

In the example of the drawing, the front end surface 41d of the second protrusion 41c which is disposed substantially in the same axial direction as the inner peripheral surface 2a of the clip main body 2 is moved in the insertion direction G, whereby It does not come into contact with the bottom surface of the notch portion 12a and smoothly passes in the axial direction, thereby easily passing over the locking weir 12.

Further, although not shown in the drawings, the entire hook or the at least the bent portion 41 (the second protruding portion 41c) may be elastically deformed locally and moved in the insertion direction G, whereby the second protrusion is changed. The front end surface 41d of the portion 41c spans the bottom surface of the notch portion 12a which is formed in a concave shape shallower than the illustrated example, so that the bent portion 41 (second projection portion 41c) of the hook 4 passes over the locking weave 12 in the axial direction. .

Further, if the amount of deformation of the clip main body or the hook 4 is large, it is not necessary to form the notch portion 12a in a concave shape.

With this movement, after the bending portion 41 of the hook 4 passes the locking hook 12 in the insertion direction G, as shown in FIGS. 3(e) and (f), when the operation portion 3 is reversely moved, the expansion of the clip body 2 is released. When the diameter is deformed, the clip main body 2 is elastically reduced in diameter and the connection end portion of the pipe body A is sandwiched and fastened between the nipple 1 of the joint B and the nip.

At the same time, the front end surface 41d of the bent portion 41 enters the engagement groove 13 of the nipple 1.

Thereby, the second protrusion portion 41c of the bent portion 41 and the second side surface 12d of the locking weft 12 are engaged with each other in the falling direction F, and are prevented from moving. Therefore, the connecting end portion of the pipe body A is prevented from being detached from the nipple 1 of the joint B by the clip C, so that the pipe body A is reliably connected to the joint B.

According to the tube fixing structure of the embodiment of the present invention, in the preparation step of providing the clip C with respect to the connection end portion of the tube body A of the nipple 1 in which the joint B is inserted, even if the clip main body 2 is along the tube body A The outer surface A1 moves in the insertion direction G, and the front end surface 41d of the bent portion 41 does not collide with the outer surface A1 of the pipe body A. Therefore, scratching of the outer surface A1 of the pipe body A can be prevented.

Then, the operation portion 3 moves the clip main body 2 in a state of being expanded and deformed toward the locking hook 12 of the nipple 1, and the bending portion 41 of the hook 4 passes over the locking weave 12 in the insertion direction G, and then the operation portion 3 is used. The diameter of the clip body 2 is released. Thereby, the clip main body 2 is elastically reduced in diameter, and the distal end surface 41d of the bent portion 41 is deformed by the elastic reduction to enter the engagement groove 13 of the nipple 1. At the same time, the (second projection 41c of the bent portion 41) and the (second dam side surface 12d of the locking cymbal 12) are engaged in the axial direction and cannot move.

After the connecting end portion of the pipe body A is connected and fixed to the joint B by the clip C, the connecting end portion of the pipe body A is reduced in diameter as the clip body 2 is cut or changed with respect to the outer surface A1 of the pipe body A. In the deformation, the second projection 41c of the bent portion 41 also moves inward in the radial direction along the second dam side surface 12d of the locking cymbal 12, thereby maintaining the engagement state between the two.

Thereby, regardless of whether or not the connection end portion of the pipe body A is reduced in diameter, it is possible to achieve reliable prevention.

Therefore, it is possible to maintain excellent peeling strength over a long period of time, and it is possible to prevent an accident caused by the falling off of the pipe body A.

In particular, as shown in the example, the locking catch 12 of the nipple 1 has a notch portion 12a through which the bent portion 41 of the hook 4 can pass in the axial direction, and when the bent portion 41 has a width wider than the locking turn 12 In the space 41e, as shown in Fig. 3(c), the bent portion 41 (second projection portion 41c) of the hook 4 is passed along the axial direction along the notch portion 12a of the locking catch 12, whereby the bent portion 41 (second The protruding portion 41c) passes over the locking weave 12 in the axial direction.

Further, when the notch portion 12a is formed in a concave shape so as to be shallower than the depth of the engagement groove 13, the hook 4 is not excessively expanded by moving the operation portion 3 of the clip C barely. The bent portion 41 (second projection 41c) also passes over the locking weir 12. When the clamping of the operation portion 3 is released at this time, the front end surface 41d of the bent portion 41 is not rotated along the locking hook 12 (the second side surface 12d) without the hook 4 being rotated by the rotation of the clip main body 2. It also enters the engagement groove 13 of the nipple 1, and the bent portion 41 (second projection 41c) and the locking weir 12 (the second weir side surface 12d) are engaged in the axial direction and become unable to move.

Therefore, even if the amount of expansion deformation of the clip main body 2 by the operation portion 3 is small, it can be reliably prevented from being engaged with the locking hook 12.

Thereafter, as shown in FIG. 3(e), the clip main body 2 is further rotated to rotate the hook 4 along the locking weir 12 (second meandering side surface 12d), thereby bending the bent portion 41 (second protruding portion) 41c) It is preferable to move to the portion of the locking hook 12 (the second side surface 12d) where the cutout portion 12a is not provided.

In this case, the bent portion 41 (the second protruding portion 41c) and the locking catch 12 (the second meandering surface 12d) are more reliably engaged in the axial direction, so that the integrity can be improved.

When the hook 4 is disposed such that the distal end surface 41d of the second projection 41c is arranged to be concave in the radial direction from the axial extension of the inner circumferential surface 2a of the clip main body 2, the second projection is formed. The front end face 41d of the 41c is further separated from the outer surface A1 of the pipe body A.

Thereby, the scratch of the outer surface A1 of the pipe body A by the front end surface 41d of the 2nd protrusion part 41c can be reliably prevented.

Further, when the bent portion 41 (second protruding portion 41c) configured as the hook 4 is elastically deformed by the entire or partial elastic deformation of the hook 4, as shown in FIG. 3(e), the clip main body 2 is not required. Further rotation is performed.

[Example 1]

Next, each embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1 to FIG. 3, in the first embodiment, in the fitting portion 11 of the nipple 1, the end portion 2d of the clip main body 2 is opposed to the tubular body A in the radial direction, and is circumferentially An annular recessed portion 11a is provided in the direction, and the clip main system is positioned in the axial direction with respect to the locking weir 12 by the hook 4, and the annular recessed portion is embedded in the radial direction with the tubular body A fastened by the clip main body 2. Hehe.

In the example shown in FIGS. 1 to 3, a plurality of annular recessed portions 11a are formed in the fitting portion 11, and any one of the annular recessed portions 11a and the tubular body A in the clip main body 2 are formed. The end portion 2d disposed on the opposite side of the hook 4 in the falling direction F faces in the radial direction.

In detail, as the annular recessed portion 11a, a plurality of (a pair of) grooves 11b are individually formed at predetermined intervals in the axial direction, and are disposed to be detached from the tube body A most in the grooves 11b. The first step portion 11c disposed in the direction F faces the end edge of the end portion 2d of the clip main body 2 in the radial direction.

Further, the first segment portion 11c of the groove 11b disposed closest to the falling direction F of the pipe body A is erected at a right angle from the inner bottom surface of the groove 11b in the radial direction. In the recesses 11b, the second section 11d, which is disposed in the opposite direction of the detachment direction F, that is, the tube body A with respect to the insertion direction G of the nipple 1, is attached from the inner bottom surface of the recess 11b. Tilting toward the insertion direction G oblique.

Thereby, the tube body A is fastened toward the insertion portion 11 by the clip main body 2 including the movable portion 2c, and is elastically deformed along the annular recess portion 11a, so that the inner surface A2 of the tube body A is fitted into the annular recess portion 11a. Thereby, the end portion 2d on the opposite side of the hook 4 of the clip main body 2 is engaged with the first segment portion 11c of the groove 11b in the axial direction.

Further, although not shown in the drawings, one or three or more annular recessed portions 11a may be formed in the fitting portion 11, and the segments may be arranged to be radially opposite to the end portion 2d of the clip main body 2. to.

According to the tube fixing structure of the first embodiment of the present invention, the clip main body 2 which is positioned in the axial direction with respect to the locking hook 12 of the nipple 1 is elastically reduced in diameter, whereby the end of the clip main body 2 is formed. 2d, the tubular body A and the annular recessed portion 11a (first segment portion 11c) of the fitting portion 11 are fitted in the radial direction, so that the inner surface A2 of the tubular body A is axially aligned with respect to the fitting portion 11 of the nipple 1. The frictional resistance in the direction is further increased.

Therefore, it is possible to make the pipe body A more difficult to fall off from the nipple 1.

As a result, there is an advantage that the falling strength of the pipe body A with respect to the nipple 1 can be further improved.

In particular, in the example shown in FIGS. 1 to 3, the engaging hole 2e is formed to penetrate the through hole 2b separately in the strip material to be the clip main body 2.

The engaging hole 2e is disposed such that a portion of the hole edge thereof faces the pipe body A with respect to the first segment portion 11c which is erected at a right angle from the inner bottom surface of the groove 11b in the radial direction.

The shape of the engagement hole 2e is not limited to the example of the drawing, and can be changed.

Thereby, as shown in FIGS. 1(a) to (c) and FIGS. 3(e) and (f), by the clip body 2 The hole edge of the engaging hole 2e is cut into the outer surface A1 of the pipe body A into which the nipple 1 is inserted, so that the frictional resistance of the outer surface A1 and the clip main body 2 is increased, and at the same time, the hole edge of the engaging hole 2e is increased. A portion of the tubular body A and the first segment portion 11c of the annular recess 11a are fitted in the radial direction, so that the inner surface A2 of the tubular body A is rubbed in the axial direction with respect to the insertion portion 11 of the nipple 1. The resistance is further increased.

Further, as another example, as shown in FIG. 4, the engagement hole 2e may not be provided.

Further, in the example shown in FIGS. 1 to 3, the nipple 1 is integrally formed with a tool (not shown) such as a wrench or a wrench integrally formed on the other end side in the axial direction than the engagement groove 13. The tool engagement portion 14 and the connection portion 15 for connection to another pipe connection port (not shown) including another machine or another pipe body.

As the tool engagement portion 14, a hex nut is formed.

When the inner peripheral surface of the pipe joint of another machine or other pipe body or the like connected to the joint B is internally threaded, the connecting portion 15 is engraved with a corresponding external thread, and when the outer periphery of the pipe joint is When the surface is engraved with an external thread, the corresponding internal thread is engraved. In the illustrated example, an external thread is engraved as the connecting portion 15.

Further, although not shown in the drawings, the nipple 1 and the joint B may be separately formed, and the nipple 1 and the joint B may be detachably attached.

Further, it is also possible to electrically connect the nipple 1 of the joint B to another machine or other pipe body by the connecting portion 15.

In particular, when the clip main body 2 and the hook 4 of the joint B and the clip C are formed of a conductive material such as metal, the hook of the clip main body 2 which is in contact with the outer surface A1 of the tubular body A in the connected state of the tubular body A and the joint B 4 contact with the locking jaw 12 of the threaded socket 1, so the outer surface A1 of the tube body A The clip body 2 is in a state of being in electrical communication with the nipple 1 or another machine or other tube.

Moreover, when a conductive portion or an outermost layer containing a conductive material is provided on the outer surface A1 of the tube body A in order to remove static electricity generated in the transfer of the fluid passing through the tube body A, it can occur in the transfer of the fluid. Static electricity is grounded from the outer surface A1 of the pipe body A through the clip main body 2 on the side of the nipple 1 . Thereby, it is possible to provide a pipe fixing structure excellent in safety.

Further, when the screw is connected to the other pipe connection port as the connecting portion 15, the notch portion 12a of the locking weir 12 may be disposed at an angle that is difficult for the operator to observe depending on the screwing state of the connecting portion 15.

Therefore, in the illustrated example, a plurality of (a pair of) notch portions 12a are individually formed at predetermined intervals in the circumferential direction on the locking hooks 12.

Further, although not shown in the drawings, three or more notch portions 12a may be formed individually at predetermined intervals in the circumferential direction on the locking hooks 12.

[Example 2]

As shown in FIG. 5, in the second embodiment, a plurality of hooks 4 are individually provided at predetermined intervals in the circumferential direction at one end in the axial direction of the clip main body 2, and are individually spaced at predetermined intervals in the circumferential direction on the locking jaws 12. The notch portion 12a having the same number or more than the number of the hooks 4 is formed differently from the embodiment 1 shown in FIGS. 1 to 4, and the other configuration is the same as the embodiment shown in FIGS. 1 to 4. 1 the same.

In the example shown in FIG. 5, at the one end in the axial direction of the clip main body 2, the pair of hooks 4 are formed at a predetermined interval in the circumferential direction so as to face the notch portion 12a formed in one of the locking hooks 12.

Further, although not shown in the other examples, it is also possible to be at one end of the clip body 2 in the axial direction. Three or more hooks 4 are individually formed at predetermined intervals in the circumferential direction.

According to the tube fixing structure of the second embodiment of the present invention, the clip main body 2 is relatively uniformly engaged with the locking hook 12 of the nipple 1 in the circumferential direction by the plurality of hooks 4, so that the clip main body 2 can be prevented from being threaded relative to the thread. The locking of the catch 1 of the takeover 1 is loose.

Thereby, compared with the first embodiment shown in FIG. 1 to FIG. 4, the fastening by the clip main body 2 is stabilized, and it is possible to maintain excellent peeling strength over a long period of time, and it is possible to prevent the falling of the pipe body A. The advantages of the accident.

Further, in the example shown in FIG. 5, the engaging hole 2e is formed in the band member which is the clip main body 2, but the present invention is not limited thereto, and similarly to the example shown in Fig. 4, the engaging hole may not be provided. 2e.

[Example 3]

As shown in Fig. 6 or Fig. 7, in the third embodiment, in the fitting portion 11 of the nipple 1, an annular seal member 16 is provided at a position opposed to the clip body 2 in the radial direction across the pipe body A. The clip main system is positioned in the axial direction with respect to the locking weir 12 by the hook 4, and the annular seal is crimped in the radial direction with the inner surface A2 of the pipe body A fastened by the clip main body 2, This configuration is different from the first embodiment shown in FIG. 1 to FIG. 4 or the second embodiment shown in FIG. 5, and the other configuration is the same as that shown in the embodiment 1 or FIG. 5 shown in FIGS. 1 to 4. Example 2 is the same.

In the example shown in FIG. 6, an annular convex portion 11e is formed in the fitting portion 11, and an annular seal is embedded in the annular convex portion 11e so as to protrude from the outer peripheral surface of the fitting portion 11 at the outer peripheral end thereof. Item 16. The arrangement position of the annular convex portion 11e and the annular seal 16 is aligned with the strip material of the clip main body 2 positioned in the axial direction with respect to the locking hook 12 by the hook 4 in the radial direction.

In detail, the locking groove 11f is recessed in the annular convex portion 11e, and the annular seal 16 is fitted into the locking groove 11f, whereby the outer peripheral end of the annular seal 16 is looped. The outer peripheral surface of the convex portion 11e is partially protruded so as not to be movable in the axial direction.

As the annular seal 16, a spacer 16a including an elastically deformable O-ring or the like made of an elastic body such as rubber is preferably used. The spacer 16a is disposed so as to face the movable portion 2c and the like disposed at a substantially central portion in the axial direction of the clip body 2 with the tube body A interposed therebetween in the radial direction.

In the example shown in FIG. 7, a plurality of (a pair of) annular seals are embedded in such a manner that the respective outer peripheral ends protrude from the inner bottom surface of the recess 11b with respect to the plurality of annular recessed portions 11a formed in the fitting portion 11. Item 16. The position where the annular convex portion 11e and the annular seal 16 are disposed is positioned so as to overlap the strip-shaped material of the clip main body 2 positioned in the axial direction with respect to the locking hook 12 by the hook 4 in the radial direction. quasi.

In detail, the locking groove 11f is recessed in the groove 11b of each annular recessed portion 11a, and the annular sealing member 16 is fitted into the inside of each locking groove 11f, whereby the annular sealing member 16 is formed. The outer peripheral end is held so as not to be able to move in the axial direction so as to partially protrude from the inner bottom surface of the recess 11b.

As the annular seal 16, a spacer 16b including an elastically deformable O-ring made of an elastic body such as rubber is preferably used. The plurality of (a pair of) spacers 16b are disposed so as to face each other in the axial direction across the tubular body A and the axial end portions of the clip main body 2.

According to the tube fixing structure of the third embodiment of the present invention, the clip body 2 which is positioned in the axial direction with respect to the locking hook 12 of the nipple 1 is elastically reduced in diameter, whereby the inner surface of the tube body A is formed. A2 is strongly pressed by the annular seal member 16 (the outer peripheral ends of the gaskets 16a, 16b), so that the inner surface A2 of the pipe body A is in close contact with the annular seal member 16.

Therefore, the inner surface of the pipe body A can be reliably sealed by appropriate fastening of the clip body 2. A2 and the insertion portion 11 of the nipple 1.

As a result, only by appropriately fastening the clip body 2, it is possible to prevent the detachment from the tube body A more than the embodiment 2 shown in Figs. 1 to 4 or Fig. 5, especially if When the synthetic resin hose or the like is used for a long period of time, the inner surface A2 of the pipe body A is reduced in elastic repulsion due to permanent strain, and the annular seal member 16 is also strongly pressed against the inner surface of the pipe body, so that no gap is generated. The piping connection is maintained without separation for a long period of time.

In this way, it is possible to use a pipe material which is placed in a state where the pipe is connected for a long period of time, such as an indoor pipe of a house, for example, even if it is a flexible pipe body A such as a synthetic resin hose.

Further, in the example shown in Fig. 6, one annular seal member 16 is disposed to face the substantially central portion of the clip main body 2 in the radial direction, and in the example shown in Fig. 7, A plurality of (a pair of) annular seals 16 are disposed so that both ends of the clip main body 2 in the axial direction are opposed to each other. However, the present invention is not limited thereto, and may be changed to a substantially central portion in the axial direction of the clip main body 2 or The annular seal 16 is disposed in a portion other than the end portions in the axial direction, or three or more annular seals 16 are disposed.

1‧‧‧Threaded take over

2‧‧‧ Clip body

2a‧‧‧ inner circumference

2b‧‧‧through holes

2c‧‧‧movable department

2d‧‧‧End

2e‧‧‧ snap hole

3‧‧‧Operation Department

4‧‧‧ hook

11a‧‧‧ annular recess

11b‧‧‧ Groove

11c‧‧‧The first paragraph

11d‧‧‧The second paragraph

12‧‧‧ card stop

12a‧‧‧Gap section

12b‧‧‧ first side

12c‧‧‧ outer surface

12d‧‧‧second side

13‧‧‧ snap groove

14‧‧‧Tools and Engagement Department

15‧‧‧Connecting Department

41‧‧‧Flexing Department

41a‧‧‧First protrusion

41b‧‧‧Cylinder

41c‧‧‧second protrusion

41d‧‧‧ front face

41e‧‧‧Rotation space

A‧‧‧ tube body

A1‧‧‧ outer surface

A2‧‧‧ inner surface

B‧‧‧ connector

C‧‧‧ clip

F‧‧‧Drop direction

G‧‧‧Inset direction

S‧‧‧Space Department

S1‧‧‧ first space

S2‧‧‧Second space

Claims (5)

A pipe fixing structure comprising: a threaded pipe inserted into an elastically deformable pipe body; and a clip main body sandwiching the pipe body and being elastically deformable in a radial direction of the fastening An operation portion for elastic deformation is provided on the clip body; and a hook is protruded from the clip body; the threaded socket has an insertion portion inserted into the tube body and is disposed at an end of the insertion portion a locking yoke and an engaging groove that is disposed on a side opposite to the insertion portion, and the hook has a buckling that passes over the locking ridge in the axial direction as the clip body is deformed in the radial direction The distal end surface of the flexure portion is disposed on an axial extension line of the inner circumferential surface of the clip main body, and is disposed to face the space between the locking cymbal and the engagement groove in a radial direction. The pipe fixing structure of the first aspect of the invention, wherein the locking yoke of the nipple has a notch portion capable of passing the buckling portion of the hook in an axial direction; the buckling portion having a width ratio to the locking portion锷 Wide space for rotation. The pipe fixing structure according to claim 1 or 2, wherein in the insertion portion of the nipple, the pipe body is opposed to the pipe body at a position opposite to the pipe body in the radial direction, and is circumferentially An annular recessed portion is provided in the direction, and the main system of the clip is positioned in the axial direction with respect to the locking cymbal by the hook, and the annular recess is fitted in the radial direction with the tubular body fastened by the clip main body . For example, the pipe fixing structure of claim 1 or 2, wherein In the inserting portion of the nipple, an annular seal is disposed at a position opposite to the tubular body in a radial direction with the clip body, and the clip main system uses the hook relative to the locking ridge along the shaft The direction is positioned, and the annular seal is crimped in the radial direction with the inner surface of the tubular body fastened by the clip body. The pipe fixing structure of claim 3, wherein in the fitting portion of the nip, an annular seal is provided at a position opposite to the pipe body in a radial direction with respect to the pipe body, The main system of the clip is positioned in the axial direction relative to the locking jaw by the hook, and the annular seal is crimped in the radial direction with the inner surface of the tubular body fastened by the clip body.