JP5164683B2 - Hose clamp holding structure - Google Patents

Description

  The present invention relates to a holding structure for a hose clamp. More specifically, in order to fasten and connect the connecting portion formed by fitting the end of the hose to the outer peripheral portion of the cylindrical pipe end with a tightenable hose clamp formed of an annular member. The hose clamp holding structure for holding the hose clamp at the end of the hose.

  For example, Patent Literature 1 discloses a technique in which an end portion of a hose is fitted to an outer peripheral portion of a pipe end portion, and the connecting portion is fastened and connected by a hose clamp. 2. Description of the Related Art Conventionally, as a hose clamp, a wire-like or belt-like annular member that is reduced in diameter by tightening an operation screw and tightened is widely used. In order to efficiently tighten the connecting portion between the pipe and the hose, a hose clamp in an expanded state may be temporarily fastened to the end portion of the hose in advance before connecting the pipe and the hose. For example, a sponge is bitten between the hose and the expanded annular member, and the clamp is temporarily fixed by the elasticity of the sponge, or the annular member is welded with rubber or resin formed separately, and temporarily fixed. I was doing.

JP-A-8-135534

  However, in the conventional temporary fastening method, the hose clamp is not necessarily sufficiently fixed to the hose, and the hose clamp may fall off before connecting the pipe and the hose. In other words, the hose clamp that is temporarily fastened to the outer periphery of the hose is in a state of play with respect to the hose, so that the hose clamp may wobble if an impact is applied during transportation in the temporarily fastened state (assy state). There was a case where it came off.

  Then, this invention made it the subject to suppress that a hose clamp fell off from the edge part of a hose, when hold | maintaining a hose clamp in the edge part of a hose.

The present invention takes the following means in order to solve the above problems.
In the first aspect of the present invention, the connecting portion formed by fitting the end portion of the hose to the outer peripheral portion of the cylindrical pipe end portion is tightened and connected by a tightenable hose clamp formed of an annular member. A hose clamp holding structure for holding the hose clamp at the end of the hose, and a protrusion is integrally formed radially on the outer periphery of the end of the hose. A folder of plate-like members having engaging means for engaging with the annular member is disposed, and the folder has a fitting hole into which a base portion of the protrusion of the hose is fitted, and A guide slit is provided for guiding the relative position of the fitting hole with respect to the base of the protrusion along the circumferential direction of the hose when fitting the base of the protrusion of the hose and the fitting hole of the folder, Hose end bump The outer periphery of the tip is formed larger than the base, and the tip of the protrusion is formed around the fitting hole of the folder when the protrusion has an action in the removal direction with respect to the fitting hole. A hose clamp holding structure characterized in that a claw portion that can bite into is provided.

  Here, the end portion of the hose is a portion that overlaps with the pipe and constitutes a connecting portion when the hose is fitted to the pipe. According to this 1st invention, a hose clamp is hold | maintained at the edge part of a hose via the folder of the plate-shaped member provided with the engagement means engaged with the annular member of a hose clamp. The folder is attached to the end of the hose by fitting the base of the protrusion formed at the end of the hose into the fitting hole formed in the folder. The folder is formed with a guide slit that guides the relative position of the fitting hole with respect to the base of the projection along the circumferential direction of the hose when the base of the projection of the hose and the fitting hole of the folder are fitted. When attaching the folder to the end portion of the hose, the projection of the hose and the fitting hole of the folder can be easily fitted by moving the folder along the circumferential direction of the hose. And the protrusion at the end of the hose has a larger outer periphery at the tip than at the base, and when the protrusion has an action in the pulling direction around the fitting hole of the folder, A claw portion that can bite into the tip of the protrusion is provided. The “removal direction” with respect to the fitting hole is a direction in which the tip of the protrusion passes through the fitting hole and the fitting between the protrusion and the fitting hole is released. It is possible to prevent the projection from being detached from the fitting hole of the folder by biting the claw portion of the folder into the tip end portion of the projection when the projection has an action in the removal direction with respect to the fitting hole. Thereby, it can suppress that the hose clamp hold | maintained in the state which has a play in the edge part of a hose falls from the edge part of a hose.

  A second invention is the hose clamp holding structure according to the first invention, wherein the folder has a rotation preventing portion that serves as a relative positioning in the circumferential direction with the tightening operation portion of the hose clamp. It is the holding structure of the hose clamp characterized by being formed.

  According to the second invention, the rotation of the hose clamp in the circumferential direction is suppressed by forming the anti-rotation portion that serves as a circumferential relative positioning with the tightening operation portion in the folder. Accordingly, even when a pressure is applied in the circumferential direction when tightening the clamp, the rotation preventing portion prevents the rotation in the circumferential direction, and the tightening operation can be easily performed.

  3rd invention is the holding structure of the hose clamp as described in the said 1st invention or the said 2nd invention, Comprising: The annular member of the said hose clamp is wire shape, The said engaging means is said wire shape It is the holding structure of the hose clamp characterized by being arrange | positioned along the circumferential direction of the said hose as a groove part which can fit this annular member.

  According to the third aspect of the invention, since the engaging means is formed as a groove portion into which the wire-like annular member can be fitted, the relative position of the hose clamp with respect to the hose is reliably positioned in both the longitudinal direction and the circumferential direction. can do.

According to the present invention, the following effects are obtained by the above-described means.
According to 1st invention, it can suppress that a hose clamp falls off from the edge part of a hose.
According to the second invention, rotation in the circumferential direction is suppressed by the rotation preventing portion, and the tightening operation can be easily performed.
According to the third aspect, the relative position of the hose clamp with respect to the hose can be reliably positioned in both the longitudinal direction and the circumferential direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a hose clamp holding structure 10 according to the present embodiment, and before the air hose 20 is connected to a pipe end (not shown), the hose clamp 30 is connected to the air hose 20. It shows a state of being held at the end of the. The hose clamp holding structure 10 includes an air hose 20 having a connecting portion 24 with a pipe at an end, and a folder 40 attached to the connecting portion 24 of the air hose 20. The hose clamp 30 is held at the end of the air hose 20 by engaging the hose clamp 30 with the folder 40. The hose clamp holding structure 10 is applied to an air hose constituting an air supply path of an automobile engine, for example.

  The hose clamp 30 is a conventionally known hose clamp having an annular member 32 and a tightening operation portion 34 for reducing or expanding the diameter of the annular member 32. The annular member 32 is formed by bending a single wire member at the center to make a double, and the double wire member intersects both ends to make an annular shape. As shown well in FIG. 3, the tightening operation portion 34 includes an operation screw 36, a nut 37, and a screw receiver 38. The operation screw 36 has a small diameter portion 36c that is not threaded at the tip of the male screw portion 36b opposite to the head 36a. A female screw of a nut 37 is screwed into the male screw part 36b, and the small diameter part 36c is rotatably fitted in a screw receiver 38. Here, the head 36 a side of the operation screw 36 will be described as the front of the tightening operation portion 34, and the screw receiver 38 side will be described as the rear. The annular member 32 has a bent end 32 a of the wire member from the front side of the screw receiver 38. It wraps around and engages with the rear surface, and both ends of the wire member, which is the other end 32b, wrap around the nut 37 from the rear side and engage with the front surface.

  When the operation screw 36 is turned, the nut 37 moves relatively forward with the other end 32b of the annular member 32 and the distance from the screw receiver 38 increases, and the diameter of the annular member 32 is reduced. As the distance between and the screw receiver 38 approaches, the diameter of the annular member 32 is increased. The hose clamp 30 is held at the end of the air hose 20 in an expanded state. The air hose 20 held by the hose clamp 30 is fitted to the outer periphery of the pipe end, and the operation screw 36 is turned to turn the annular member 32. By reducing the diameter, the connecting portion of both can be tightened and prevented from coming off.

  As shown well in FIG. 1, the air hose 20 has a body 22 having a bellows shape, but its tip is formed in a cylindrical shape that can be fitted into a cylindrical pipe end. Is the connecting portion 24. The air hose 20 can be formed, for example, by blow molding a material containing rubber into olefin-based elastomer polypropylene. As shown in FIG. 3, the air hose 20 has a protrusion 26 integrally formed in the radial direction on the outer peripheral portion of the connecting portion 24 (see FIGS. 3 and 4). As shown well in FIG. 4, the tip portion 28 of the protrusion 26 protrudes from the outer periphery of the base portion 27 and has a recess 28a at the center. More specifically, the tip 28 of the protrusion 26 protrudes in the axial direction of the air hose 20, and the recess 28a is formed along the circumferential direction.

  As shown in FIG. 5, the folder 40 is made of, for example, polyacetal, and includes a main body portion 42 formed of a substantially rectangular plate-like member in plan view, and a rib 44 provided upright from an end of the main body portion 42. Have Engaging means 48a and 48b formed as grooves into which the wire-like annular member 32 of the hose clamp 30 can be fitted are provided at the end of the main body 42 that does not face the rib 44. As shown in FIG. 4, the engaging means 48a and 48b have a substantially C-shaped cross section, and when the annular member 32 is fitted, the annular member 32 can be gripped and prevented from coming off in the radial direction.

  A circular fitting hole 46 into which the base 27 of the projection 26 of the air hose 20 is fitted is formed in the main body 42 of the folder 40. A guide slit 47 that opens the fitting hole 46 in a direction opposite to the rib 44 is formed. The slit 47 moves the relative position of the fitting hole 46 with respect to the base 27 of the projection 26 along the circumferential direction of the air hose 20 when fitting the base 27 of the projection 26 of the air hose 20 and the fitting hole 46 of the folder 40. It is formed so that it can be guided. The guide slit 47 has a width narrower than the diameter of the base portion 27 of the protrusion 26, but is formed so as to allow passage of the base portion 27 when the base portion 27 of the protrusion 26 is elastically compressed and deformed. . Then, by sliding the folder 40 along the outer peripheral surface of the air hose 20, the base portion 27 of the protrusion 26 enters the guide slit 47 and is guided to the fitting hole 46, and the base portion 27 of the protrusion 26 enters the fitting hole 46. Can be fitted. Thereby, the hose clamp 30 can be held at the end of the air hose 20 via the folder 40 to be in the assembly state.

  A claw portion 50 is erected on the main body portion 42 of the folder 40 along the edge of the fitting hole 46. The nail | claw part 50 is a cross-sectional triangle (refer FIG. 4), and is formed continuously over the perimeter of the fitting hole 46. FIG. The distal end portion 28 of the protrusion 26 has a larger outer periphery than the base portion 27, and cannot be passed through the fitting hole 46 while maintaining its shape. The claw portion 50 has an action in a direction in which the protrusion 26 fitted in the fitting hole 46 is pulled out, that is, the tip 28 of the protrusion 26 is pulled out through the fitting hole 46. When it hits, it can bite into the front-end | tip part 28 of the processus | protrusion 26. Since the hose clamp 30 is held with play at the end of the air hose 20 in the assembly state, for example, an impact is applied during transportation, and the hose clamp 30 is attached to the end of the air hose 20 with the folder 40. By trying to move relative to each other in the radial direction, the protrusion 26 may act in the removal direction. However, the claw portion 50 bites into the tip portion 28 of the protrusion 26, so that the tip portion 28 of the protrusion 26 can be prevented from coming out of the fitting hole 46.

  The folder 40 is disposed so that the engaging means 48 a and 48 b are along the circumferential direction of the air hose 20, and the ribs 44 divide the circumferential direction of the air hose 20. The hose clamp 30 is gripped by the annular member 32 being fitted into the engaging means 48 a and 48 b in a state where one end 32 a of the annular member 32 located at the rear portion of the tightening operation portion 34 is in contact with the rib 44. Thereby, the hose clamp 30 is positioned with respect to the longitudinal direction of the air hose 20, and circumferential displacement is also suppressed by the frictional force generated between the engaging means 48 a and 48 b and the annular member 32. Here, the rib 44 plays a role of relative positioning in the circumferential direction with the tightening operation portion 34 of the hose clamp 30 and corresponds to a rotation preventing portion of the present invention.

According to the hose clamp holding structure 10 having the above-described configuration, the following operational effects can be obtained.
First, the hose clamp 30 can be held by the folder 40 by fitting the annular member 32 of the hose clamp 30 to the engaging means 48 a and 48 b of the folder 40. At the same time, the folder 27 is fixed to the end of the air hose 20 by fitting the base 27 of the projection 26 provided at the end of the air hose 20 with the fitting hole 46 of the folder 40 to be in the assembly state. it can. Since the guide slit 47 is formed in the folder 40, the base 27 of the protrusion 26 of the air hose 20 can be fitted into the fitting hole 46 of the folder 40 by sliding the folder 40 along the outer peripheral surface of the air hose 20. it can. Therefore, when the hose clamp 30 is held in the folder 40 and assembled to the air hose 20, the distance between the expanded hose clamp 30 and the outer peripheral surface of the air hose 20 is narrow, and the protrusion 26 is formed in the fitting hole 46 of the folder 40. Even if the operation of pushing vertically is difficult, the assembly 40 can be easily fixed to the air hose 20 to be in the assembly state.

  In this assembly state, the engaging means 48a and 48b of the folder 40 are formed as grooves for gripping the annular member 32 of the hose clamp 30, so that the hose clamp 30 is unlikely to fall off in the assembly state. Further, the circumferential displacement of the hose clamp 30 is also suppressed by the frictional force generated between the annular member 32 and the annular member 32. A claw portion 50 is formed around the fitting hole 46 of the folder 40, and when the protrusion 26 acts in the removal direction, it bites into the tip portion 28 of the projection 26, and the tip portion 28 of the projection 26 is fitted. The assembly state can be maintained by preventing the holes 46 from coming out. More specifically, when the projection 26 having a large tip portion 28 is formed on the air hose 20, the tip portion is secured in order to ensure the releasability of the projection portion during molding and to ensure strength by reducing the thickness change. 28 may be provided with a recess 28a. In addition, in general, the hose is often made of a material having excellent flexibility, and even if the tip portion 28 of the projection 26 is larger than the fitting hole 46 of the folder 40, the tip portion 28 falls into the recess 28a and is deformed and fitted. There is a risk of exiting the joint hole 46. However, the claw portion 50 is set in the folder 40 of the present embodiment, and the tip portion 28 of the projection 26 can be prevented from coming out of the fitting hole 46 by biting into the tip portion 28 of the projection 26. The tip portion 28 of the protrusion 26 bulges in a direction intersecting with the guide slit 47 of the folder 40, and the claw portion 50 is disposed immediately below the bulged tip portion 28, so that the claw portion 50 can bite in effectively. it can.

  Next, even when the operation screw 36 is rotated by using an air driver or the like, the rib 44 as a detent portion is provided at the rear portion of the tightening operation portion 34 of the hose clamp 30 even when the pressure is applied from the front to the rear. Since the contact is made, the backward movement of the tightening operation part 34 is prevented, and the position of the tightening operation part 34 is maintained. Thereby, the operation screw 36 can be smoothly turned.

  The present invention is not limited to the above embodiment, and various other embodiments can be considered without departing from the gist of the present invention. For example, at least the claw portion 50 can be intermittently formed around the fitting hole 46 as long as the claw portion 50 is provided at a position where it can bite into the tip portion 28 of the protrusion 26. Further, the protrusion 26 may be a solid one in which the recess 28a is not formed.

It is a perspective view of the holding structure of the hose clamp of the embodiment of the present invention. It is a front view of the holding structure of the hose clamp shown in FIG. It is the III-III line expanded sectional view of the holding structure of the hose clamp shown in FIG. It is the IV-IV line expanded sectional view of the holding structure of the hose clamp shown in FIG. It is a perspective view of the folder which concerns on the holding structure of the hose clamp of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hose clamp holding structure 20 Air hose 22 Trunk part 24 Connection part 26 Protrusion 27 Base part 28 Tip part 30 Hose clamp 32 Annular member 34 Tightening operation part 40 Folder 42 Main part 44 Rib (Anti-rotation part)
46 Fitting hole 47 Guide slits 48a and 48b Engaging means 50 Claw portion

Claims (3)

A hose clamp for tightening and connecting a connecting portion formed by fitting an end portion of a hose to an outer peripheral portion of a cylindrical pipe end portion by a tightenable hose clamp formed of an annular member. A hose clamp holding structure to be held at the end of the
On the outer peripheral portion of the end portion of the hose, a protrusion is integrally formed projecting in the radial direction, and a plate-shaped member folder having engagement means for engaging with the annular member of the hose clamp is disposed. The folder has a fitting hole into which the base of the projection of the hose is fitted, and the projection when the base of the projection of the hose and the fitting hole of the folder are fitted together. A guide slit is provided for guiding the relative position of the fitting hole to the base of the hose along the circumferential direction of the hose,
The protrusion at the end of the hose has a larger outer periphery at the tip than at the base, and when the protrusion has an action in the removal direction with respect to the fitting hole around the fitting hole of the folder The hose clamp holding structure is characterized in that a claw portion that can bite into the tip end portion of the protrusion is provided. The hose clamp holding structure according to claim 1,
A holding structure for a hose clamp, wherein the folder is formed with an anti-rotation portion that serves for relative positioning in the circumferential direction with the tightening operation portion of the hose clamp. The hose clamp holding structure according to claim 1 or 2,
An annular member of the hose clamp is wire-shaped, and the engaging means is disposed along a circumferential direction of the hose as a groove portion into which the wire-shaped annular member can be fitted. Holding structure.

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