JP2009103164A - Hose clip and tool for assembling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhancing force for preventing a hose from coming off without increasing the number of components of a hose clip. <P>SOLUTION: The hose 2 is inserted to a position right before a bulge part 3A protrusively formed near the end of a pipe body 1. The hose clip H1 comprises a clip main body C1 fastening the hose and a non-slip part A1 integrally extending from the clip main body C1. A plurality of hooking parts 13 are formed by striking out to project inward along a circumferential direction at the non-slip part A1. Each hooking part 13 locks the bulge part 3A under a condition that the clip main body C1 is contracted and the hose 1 is fastened. Consequently, the non-slip force is enhanced since locking force on the bulge part 3A is added on fastening force on the hose 2 with relating to the non-slip force of the hose clip H1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hose clip and a jig for assembling the hose clip.

  Conventionally, a fastening tool called a hose clip has been used in a place where a hose is connected to a pipe body (pipe or the like). Near the end of the tube, a flange called a bulge is formed over the entire circumference. . On the other hand, the hose clip is loosely inserted on the hose side in the expanded diameter state, and after the hose is inserted into the pipe body, it is moved to a position beyond the bulge, where the expanded diameter state is released and the hose is tightened. I was doing. As described above, the hose clip tightens the hose behind the bulge portion, thereby enhancing the effect of preventing the disconnection.

  However, such a method has a problem that it is difficult to insert the hose because it is necessary to pass through the bulge portion as an operation for inserting the hose into the pipe body.

Therefore, the hose is inserted at the front of the bulge so that the hose is inserted, and the hose clip is tightened at the front of the bulge. Came to be desired. As such a hose clip, one disclosed in Patent Document 1 below is known.
JP 2007-187307 A

  The thing of the said gazette is accommodated in the supporter in the state which divided | segmented and combined the hose clip into the height direction. When both the supporters are combined, the bulge portion is sandwiched from the thickness direction, thereby enhancing the retaining force against the hose.

  However, in addition to the hose clip, there is a problem that the number of parts is large, such as requiring a supporter, and time is required for assembly.

  The present invention has been completed based on the above circumstances, and an object thereof is to provide a hose clip having a small number of parts and excellent workability, and a jig for assembling the hose clip.

  As a means for achieving the above-mentioned object, the invention of claim 1 is inserted to the front side of the bulge portion with respect to a tubular body having a bulge portion projecting radially outward at a position near the end portion. A hose clip that can tighten a hose based on its own elastic force, and a ring-shaped clip body that tightens the hose at a position in front of the bulge part, and integrally from the clip body toward the bulge part side And a retaining portion for restricting displacement of the clip body in a direction away from the bulge portion by locking the hose to the bulge portion when the clip body is tightened. It is characterized by.

  According to a second aspect of the present invention, in the first aspect of the present invention, the retaining portion has a peripheral surface along at least a part of the outer peripheral surface of the bulge portion, and the peripheral surface faces inward. A hook portion that can be bent and locked to the bulge portion is provided.

According to a third aspect of the present invention, when the clip main body is held in an enlarged state having an inner diameter that allows the clip main body to be loosely inserted into the hose and released from the clip main body. On the other hand, a holding portion is provided that enables the clip body to shift to a reduced diameter state in which the inner diameter is reduced,
The retaining portion has a locking arm that extends from the radially outer side of the tubular body so as to bend toward the outer peripheral surface of the tubular body, and the locking body has a diameter-expanded state of the clip body. The clip body can be locked to the bulge part at a certain time, and the clip body is bent and deformed while sliding on the outer peripheral surface of the tube body when the clip body shifts to a reduced diameter state. It is characterized in that the state is maintained.

  According to a fourth aspect of the present invention, in the method according to any one of the first to third aspects, the retaining portion includes a direction in which the clip main body approaches or moves away from the bulge portion with respect to the bulge portion. The movement in either direction is locked in a restricted state.

The thing of Claim 5 WHEREIN: The said hose clip is formed with a metal leaf | plate spring material, and the 1st knob formed in the narrow width is formed in the length direction one end side of the said clip main body, On the other end side, there is formed a second knob with an open groove that allows the tip of the first knob to be crossed in the crossing direction, and between the first knob and the second knob in the clip body. Is formed by opening a pair of triangular windows facing each other symmetrically with the central axis in the length direction when the clip body is in the unfolded state,
And the connection part of the clip body and the retaining portion is between the triangular windows, between the one triangular window and the groove, or between the other triangular window and the first knob. It is provided at least in any part.

<Invention of Claim 1>
According to the first aspect of the present invention, the clip main body tightens the connection portion between the hose and the tube, whereby the hose is held in a state of being prevented from being detached from the tube. At this time, since the retaining portion formed integrally with the clip body is locked to the bulge portion, the movement of the entire hose clip in the direction away from the bulge portion is restricted. The stopping situation is strengthened.

<Invention of Claim 2>
According to the second aspect of the present invention, the hook portion that is formed to project from the peripheral surface of the retaining portion to the inner surface side is locked to the bulge portion. Since the hook portion is formed by simple bending from the retaining portion, the retaining portion is easy to prevent.

<Invention of Claim 3>
According to invention of Claim 3, a clip main body is hold | maintained in the diameter-expanded state by the holding | maintenance part, and it is fitted to the pipe body side prior to the insertion work of the hose with respect to a pipe body. At this time, the hose clip is prevented from coming off the pipe body even before the hose is tightened by locking the locking arm of the retaining portion to the bulge portion. This is particularly effective in an installation situation where, for example, the pipe is piped downward.

  Thereafter, even if the expanded diameter state is released and the clip body shifts to the reduced diameter state, the locking arm is bent and deformed, and the locked state with respect to the bulge portion is maintained as it is.

<Invention of Claim 4>
According to the invention of claim 4, since the clip body is positioned in both directions in the axial direction, it is possible to enhance the function of preventing the displacement of the hose clip.

<Invention of Claim 5>
The clip main body according to the fifth aspect of the present invention has a predetermined shape with a triangular window, and the cross-sectional area is adjusted over the entire length of the clip main body. This is a device for equalizing the tightening force of the clip body over the entire circumference, and is based on the result of calculating the stress distribution of the clip body based on the calculation in the tightened state to the hose. In such a structure, if a connection portion for the retaining portion is provided, the cross-sectional area increases at the same portion, and therefore it is not possible to make the tightening force uniform depending on the place where the connection portion is provided. Therefore, in the invention of claim 5, between the triangular windows, between one triangular window and the groove, or between the other triangular window and the first knob, a portion of the clip body where the stress is relatively low. In view of the above, at least one of these portions is selected and connected to the retaining portion. As a result, it is possible to effectively avoid a situation in which the tightening force of the clip body due to the provision of the retaining portion is hindered.

<Invention of Claim 6>
According to the invention of claim 6, when temporarily attaching the hose clip in a diameter-expanded state to the pipe body, an assembling jig is attached to the end of the pipe body in advance. After that, when it is fitted to the tube from the retaining portion side, the tip end portion of the locking arm slides on the guide surface in the process. Since the guide surface has an upward slope toward the bulge part, the locking arm gradually approaches the bulge part while flexing and deforming, and when it passes through the bulge part, it elastically returns to the bulge part. Lock. Thus, according to the sixth aspect of the present invention, the hose clip can be smoothly assembled to the tube body in a temporarily held state.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The hose clip H <b> 1 of the first embodiment is for tightening the hose 2 inserted into the outer peripheral surface of the tube body 1. The pipe body 1 constitutes a part of hot water piping in a radiator of an automobile, for example. The tube 1 is formed of a metal pipe, and a bulge 3A is formed at a position near the end. The bulge portion 3A is formed in a flange shape along the entire circumference. The hose 2 is formed of a material exhibiting flexibility, and is inserted into the front surface of the bulge portion 3 </ b> A with respect to the outer peripheral surface of the tube body 1. The hose clip H1 tightens the hose 2 at a position in front of the bulge portion 3A.

  The hose clip H1 according to the first embodiment is integrally formed of a metal leaf spring material. The hose clip H1 includes a clip body C1 for tightening the hose 2 and a retaining portion A1 that is locked to the bulge portion 3A and strengthens the retaining of the hose clip H1.

  The clip main body C1 is erected outward in the radial direction as a first knob 4 having a narrow width at one end in the length direction. On the other end side of the clip main body C1, the groove 5 opens over a predetermined length range. The groove 5 is formed with a uniform opening width in the length direction. Then, as the clip main body C1 is turned from the developed state (see FIG. 9 showing the second embodiment) into a ring shape, the distal end portion of the first knob 4 is inserted into the groove portion 5. The end of the clip body C1 on the side having the groove 5 is also erected outward in the radial direction while including the groove 5 so as to have substantially the same height as the first knob 4, and the raised portion is the second It is a knob 6.

  The clip body C1 is provided with a holding portion 7 for holding the clip body C1 in an expanded state. The holding portion 7 has a lock claw 8 disposed on one side edge of the root portion of the first knob 4. The lock claw 8 is formed by bending outward from the side edge of the clip body C1 in the radial direction, and a protrusion protrudes from the tip. On the other hand, a lock receiving piece 9 that constitutes the holding portion 7 together with the lock claw 8 is provided on the second knob piece 6 side. The lock receiving piece 9 is installed in the groove portion 5 at a position near the tip of the second knob 6 along the width direction. A contact recess 10 is formed in the lock receiving piece 9, and the projection 25 of the lock claw 8 is engaged in the contact recess 10 with both the first and second knob pieces 4 and 6 approaching each other. By stopping, the clip body C1 is held in an expanded state.

  Further, a release window 11 necessary for releasing the expanded diameter state is opened between the distal end edge of the second knob piece 6 and the lock receiving piece 9. When releasing the expanded state, a tool 12 such as a screwdriver is extended over the tip of the first knob 4 and the tip of the tool 12 is placed on the upper end of the lock claw 8 through the release window 11. Then, when the tool 12 is pushed down using this point as a fulcrum, the upper end of the first knob 4 is pushed down radially inward, so that the lock claw 8 is released from the locked state with the contact recess 10. When the upper end of the lock claw 8 is lowered from the lower edge of the lock receiving piece 9, the lock claw 8 passes through the lock receiving piece 9 based on the elastic reaction force of the clip main body C1, and the clip main body C1 shifts to a reduced diameter state. Let

  The retaining portion A1 is formed so as to protrude from the one side edge of the clip body C1 in the width direction over a predetermined length range. In this embodiment, the length range widened as the retaining portion A <b> 1 extends from the root position of the narrow portion where a part thereof becomes the first knob 4 to the root portion standing as the second knob 6. Range in length. Since the retaining portion A1 is expanded as it is from the clip body C1, it has a ring shape having the same diameter as the clip body C1. However, the inner diameter of the retaining portion A1 when the clip body C1 is held in the diameter-expanded state is sufficiently larger than the diameter of the outer edge of the bulge portion 3A.

  The retaining portion A1 is provided with a hook portion 13 that engages with the bulge portion 3A when the clip main body C1 is in a reduced diameter state. In this embodiment, the hooking portion 13 is formed in a circular arc shape with the narrow outer end edges left by passing through the three thin holes 26 in the circumferential direction at every angle of about 120 degrees inward. It is formed by bending. In addition, when the clip main body C1 is in a diameter-expanded state, each hook portion 13 is set to a protruding height that does not interfere with the bulge portion 3A. Therefore, when the clip main body C1 is in the expanded diameter state, each hook portion 13 can pass through the outside without interfering with the bulge portion 3A.

  The action and effect of the first embodiment configured as described above will be specifically described. Before the hose 2 is connected, the clip body C1 is held in an expanded state, and is directly inserted, for example, on the hose 2 side. (It may be loosely inserted into the tube 1). Next, the hose 2 is inserted from the end portion of the tube body 1 to a position before the bulge portion 3A. Then, the position of the hose clip H1 is adjusted so that each hook part 13 is positioned passing through the bulge part 3A.

  In this state, if the lock claw 8 and the contact recess 10 are unlocked using the tool 12 such as a screwdriver in the manner described above, the clip body C1 is brought into a reduced diameter state based on its own elastic force. In order to make the transition, the clip body C1 fastens and fixes the hose 2 at a position in front of the bulge portion 3A. Further, as the clip main body C1 shifts to the reduced diameter state, the retaining portion A1 is also deformed so that the diameter is reduced at the same time, so that each hook portion 13 comes close to a state where it substantially contacts the outer peripheral surface of the tube body 1. , Each is locked to the bulge portion 3A.

  Thus, in addition to the clip body C1 tightening the hose 2, each hook 13 is locked to the bulge 3A so that the entire hose clip H1 moves away from the bulge 3A. Since the moving situation is regulated, the retaining force for the hose 2 is strengthened.

  Thus, the strengthening of the retaining state with respect to the hose 2 is achieved by the retaining portion A1 formed integrally with the clip body C1, so that the number of parts does not increase. Therefore, the connection work of the hose 2 can be completed in a short time. Further, in the first embodiment, the hooks 13 are formed by simple bending after punching the hole 26, so that the structure of the hose clip H1 is simple and there are few protruding parts. The situation of receiving and deforming is also avoided.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. The clip body C2 of the hose clip H2 of the second embodiment has the same configuration as that of the first embodiment, and therefore, the same reference numerals are given in the drawings and description thereof is omitted. However, as for the tubular body 1, the bulge part 3 </ b> A is one in the first embodiment, but the bulge part 3 </ b> B of the present embodiment is formed by two adjacent ribs 19.

  The retaining portion A1 in the first embodiment is formed by continuously widening the predetermined length range of the clip body C1, but the retaining portion A2 in the second embodiment is connected at a plurality of positions on one side edge of the clip body C2. The parts are placed intermittently. This will be described with reference to a development view shown in FIG. A pair of triangular windows 14 are opened so that apex angles face each other at a symmetrical position across a central axis (indicated by YY in the figure) in the length direction of the clip body C2. One of the connecting portions to the clip body C2 in the retaining portion A2 is disposed on the central axis between the triangular windows 14. The other two connection parts are a position between one triangular window 14 (on the right side in FIG. 10) and the base of the narrow portion 15 for forming the first knob 4, and the other triangular window 14. It is a position between the groove portion 5 (the left side in the figure). In addition, the width dimensions of the connecting portions 16 disposed in the respective portions are equal to each other, and are kept to a minimum width dimension necessary for ensuring the strength of the retaining portion A2.

  As shown in FIG. 10, each of the connecting portions 16 once protrudes in a direction (axial direction) perpendicular to one side edge of the clip body C2, and then extends along the side edge of the clip body C2. A cantilevered locking arm 17 is formed by bending at a substantially right angle. Each locking arm 17 is elastically deformable in the radial direction in a state in which the hose clip H2 is bent into a ring shape, and the distal end portion of each locking arm 17 is bent so as to be curved. It is as 18. In addition, each locking arm 17 is set so that the lower surface of the arc portion 18 substantially elastically contacts the outer peripheral surface of the tube body 1 when the clip main body C2 is in the expanded state.

  In the second embodiment, the hose clip H2 can be positioned (temporarily held) and assembled to the tube body 1 in the expanded state, that is, the bulge portion 3B is overcome by elastically deforming each locking arm 17. The following assembling jig 20 is used so that it can be locked between the two flange edges 19 constituting the bulge part 3B.

  The jig 20 has a substantially cap shape as shown in FIG. 11, and is integrally formed of, for example, a synthetic resin material. The jig 20 has a main body 21 that can be fitted and fitted to the outer peripheral surface of the tube body 1. The main body 21 has a front wall 22 and is formed in a cylindrical shape that opens to the rear side. Further, a stopper edge 23 is formed in a step shape along the entire circumference at a position near the front wall 22 inside the main body portion 21, and is abutted against the opening edge of the tube body 1, so that the tube body 1. The fitting depth position of the jig 20 is defined. When the insertion depth position is defined by the stopper edge 23, the rear end of the main body 21 is substantially in contact with the front surface of the front edge 19 of the bulge 3B. On the other hand, guide surfaces 24 </ b> A and 24 </ b> B are formed on the outer peripheral surface of the main body portion 21 for gradually advancing elastic deformation of each locking arm 17. In the present embodiment, the guide surfaces 24A and 24B have a front guide surface 24A in a region near the front wall 22 and a region from the guide surface 24A to the rear end thereafter as a rear guide surface 24B. Both guide surfaces 24A and 24B are set to have an upward slope toward the bulge 3B side, but the front guide surface 24A is set to be steeper than the rear guide surface 24B. The height of the rear end edge of the rear guide surface 24B when the jig 20 is fitted to the tube 1 is slightly higher than the both side edges 19 of the bulge part 3B.

  The effect of Embodiment 2 comprised as mentioned above is demonstrated concretely. First, an operation of temporarily holding the hose clip H2 in the expanded diameter state on the pipe body 1 is performed. In that case, the jig 20 is attached to the end of the tube 1 as shown in FIG. As described above, when the stopper edge 23 is fitted to a position where it comes into contact with the opening edge of the tube body 1, the rear guiding surface 24B reaches a position where it comes into contact with the bulge portion 3B.

  Next, the hose clip H2 is inserted into the jig 20 and pushed in from the retaining portion A2 side. At this time, the front guide surface 24A has a steep slope compared to the rear guide surface 24B, that is, is formed with a small diameter. It is avoided as much as possible and can be inserted smoothly. While each locking arm 17 moves on the rear guiding surface 24B, the tip of each locking arm 17 slides on the rear guiding surface 24B and gradually increases the amount of bending. Then, after passing through the rear guide surface 24B and over the front flange 19 in the bulge portion 3B, each locking arm 17 is elastically restored and falls between the both edges 19 to be locked. Thereafter, the jig 20 is removed from the tube 1, and at this time, the hose clip H <b> 2 is positioned with respect to the tube 1 in a state where movement in the axial direction is restricted.

Next, the hose 2 is inserted, but even if the hose 2 contacts the clip main body C2 at this time, the hose clip H2 is restricted from moving in the axial direction in the tubular body 1, It won't move inadvertently. When the hose 2 is inserted to a position before the bulge portion 3B, the diameter-enlarged state of the clip body C2 is subsequently released as described above.
While the clip main body C <b> 2 shifts to the reduced diameter state, each locking arm 17 bends and deforms while being in sliding contact with the outer peripheral surface of the tube body 1 along the circumferential direction between the two flange edges 19. Thus, the hose 2 is tightened by the clip body C2, and the retaining arms 17 are latched to the bulge portions 3B in the retaining portion A2, so that the retaining force for the hose 2 is strengthened.

  As described above, also in the second embodiment, the locking arms 17 are locked to the bulge portion 3B, whereby the hose 2 can be more reliably prevented from coming off. In addition, since the hose clip H2 can be positioned in a normal position in advance before the hose 2 is inserted into the tube body 1, it is necessary for the operator to hold the hose clip H2 during the insertion work of the hose 2. There is no workability. Furthermore, in this embodiment, each position of the connecting portion 16 between the retaining portion A2 and the clip body C2 is selected and set as a predetermined position. Thereby, even if the retaining portion A2 is integrated with the clip body C2, it is not necessary to greatly affect the stress distribution state of the clip body C2 at the time of tightening the hose 2, so that a uniform tightening force can be maintained. The effect is also obtained.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In any of the embodiments, the bulge portion 3A need not be continuously formed along the entire circumference, and may be provided intermittently.

  (2) In any of the embodiments, the three places of the locking portions (the hooking portions 13 and the locking arms 17) for the bulge portion 3A are shown, but the number of arrangements is not limited, There may be one.

  (3) Various forms of the holding unit 7 are considered. As long as the clip main body C1 can be held in an expanded state and can be released, the form is not limited. Therefore, the holding portion 7 is not necessarily formed integrally with the clip body C1, and is held in an expanded state by sandwiching the first and second knob pieces 4 and 6 using separate holders. It may be something like this.

  (4) Each locking arm 17 in Embodiment 2 may be formed in a double-sided manner.

  (5) In the first embodiment, the retaining portion A1 is continuously widened from the clip body C1 to one side in the width direction over a predetermined length range. However, as in the second embodiment, the retaining portion A1 is formed at a plurality of locations. You may make it connect intermittently.

Front sectional view showing a state in which the diameter of the hose clip according to Embodiment 1 is expanded and fitted to the hose. Same top view Front sectional view showing the state when the hose clip has a reduced diameter and the hose is tightened Same top view The perspective view which shows cancellation | release operation of an expanded state Front sectional view showing a state in which the diameter of the hose clip according to Embodiment 2 is expanded and fitted to the hose. Same top view Front sectional view showing the state when the hose clip has a reduced diameter and the hose is tightened Same top view Hose clip development Side sectional view showing the state where the assembly jig is mounted on the tube

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tube 2 ... Hose 3A, 3B ... Bulge part 4, 6 ... Pick piece 7 ... Holding part 13 ... Hook part 14 ... Triangular window 16 ... Connection part 17 ... Locking arm 24A, 24B ... Guide surface H1, H2 ... Hose clip C1, C2 ... clip body A1, A2 ... retaining part

Claims (6)

A hose clip capable of tightening a hose inserted to a position just before the bulge part on the tube body having a bulge part projecting radially outward at a position near the end based on its own elastic force. ,
A ring-shaped clip body for tightening the hose at a position in front of the bulge part;
The clip body is integrally extended from the clip body toward the bulge portion, and the clip body is locked to the bulge portion in a state where the hose is tightened, so that the clip body moves away from the bulge portion. A hose clip comprising a retaining portion for restricting displacement. The retaining portion has a peripheral surface along at least a part of the outer peripheral surface of the bulge portion, and a hook portion that is bent inward and can be locked to the bulge portion is provided on the peripheral surface. The hose clip according to claim 1, wherein the hose clip is provided. The clip body can be shifted to a reduced diameter state in which the inner diameter of the clip body is reduced when the clip body is held in an expanded state having an inner diameter that can be loosely inserted into the hose and released. While a holding part is provided
The retaining portion has a locking arm that extends from the radially outer side of the tubular body so as to bend toward the outer peripheral surface of the tubular body, and the locking body has a diameter-expanded state of the clip body. The clip body can be locked to the bulge part at a certain time, and the clip body is bent and deformed while sliding on the outer peripheral surface of the tube body when the clip body shifts to a reduced diameter state. The hose clip according to claim 1, wherein the state is maintained. The retaining portion is locked to the bulge portion in a state in which movement of the clip body in either a direction approaching or moving away from the bulge portion is restricted. The hose clip according to any one of claims 1 to 3. The hose clip is made of a metal leaf spring material, and a first knob formed in a narrow width is formed on one end side in the length direction of the clip body, and the first knob is formed on the other end side. A second knob piece having an opening in the groove crossing the tip end side of the piece is formed, and the clip body is unfolded between the first knob piece and the second knob piece in the clip body. Is formed by opening a pair of triangular windows facing each other symmetrically about the central axis in the length direction when
And the connection part of the clip body and the retaining portion is between the triangular windows, between the one triangular window and the groove, or between the other triangular window and the first knob. The hose clip according to any one of claims 1 to 4, wherein the hose clip is provided at least in any part. When the hose clip according to claim 3 is in the diameter-expanded state, the hose clip is guided along the axial direction on the outer peripheral surface of the tubular body until the locking arm is locked to the bulge portion. An assembly jig for performing
The jig body has a jig body that can be mounted at the end of the tubular body in front of the bulge part, and an outer peripheral surface of the jig body has a guide surface on which the tip of the locking arm can slide. A hose clip assembling jig, characterized in that the guide surface is formed so as to rise upward from the end side of the tubular body to the bulge portion.

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