JP2010127372A - Holding structure of hose clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To temporarily join a commercial hose clamp as it is with a hose body with high positioning accuracy. <P>SOLUTION: A holding projection part 11 comprising a base part 12 and a projection part 13 and having a holding groove part 14 is formed on the outer periphery of a distal end of the hose body 1, and a ring part 20 is held with the holding groove part 14. The hose clamp is restrained in movement in the axial direction with respect to the hose body 1 by the holding projection part 11, and movement in the circumferential direction is restrained by frictional resistance by holding with the holding groove part 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the present invention, when a hose such as an air cleaner hose of an automobile is inserted into a mating part and fixed to the mating member by a hose clamp, the hose clamp that has been previously expanded in diameter is temporarily fixed to the hose at an accurate position. The present invention relates to a hose clamp holding structure.

  In the automobile assembly process, when the air cleaner hose is fixed to the air cleaner, the following assembly process is employed. In other words, the hose clamp that has been expanded in diameter is temporarily fixed at the position of the clamp groove at the tip of the hose, and the tip of the hose is inserted into a pipe protruding from an air cleaner that is already assembled and fixed to the vehicle body, and then the clamp is reduced in diameter. As a result, the hose is fastened to the pipe.

  As the hose clamp, one that is reduced in diameter by an operation screw as described in JP 2006-234022 A, or one that is reduced in diameter by its own spring elasticity as described in JP 08-082393 A, Etc. are known. When using the former hose clamp, loosen the operating screw and temporarily tighten the hose clamp on the hose. After inserting the hose into the pipe, tighten the operating screw to reduce the diameter of the hose clamp body. Is fastened to the pipe. In the case of the latter hose clamp, the diameter of the hose clamp is expanded against the spring elasticity, and the open ends of the hose clamp are temporarily fixed to the hose clamp with the fixed portion integrated with the hose clamp. The hose clamp is reduced in diameter by releasing the restraint of the fixed part with pliers after the hose is inserted into the pipe and the hose is fastened to the pipe.

  However, when the hose clamp whose diameter has been expanded in advance is temporarily fixed to the hose, the hose clamp may come off from the hose before the assembly process, and a man-hour for temporarily fixing it again is required. Further, even if the hose clamp is not dropped, it is easy to cause erroneous assembly in which the hose clamp is inclined. Therefore, it is conceivable to temporarily fix the hose clamp with a reduced diameter to some extent, but in that case, the workability of assembling to the pipe is reduced.

  Furthermore, the position of the pipe projecting from the air cleaner varies depending on the arrangement of various components in the engine room, and depending on the arrangement, it may be difficult to reduce the diameter of the hose clamp when fastening the hose. For this reason, when the hose clamp is temporarily fixed to the hose in a state where the diameter of the hose clamp is held in advance and the diameter of the hose clamp is reduced after being inserted into the pipe, it is necessary to position the diameter reducing means formed on the hose clamp at a position where it can be easily operated. is there. Further, the air cleaner hose or the like is formed in a predetermined bent shape in advance, and when inserted through the pipe, it is necessary to determine the tip position so as to be disposed at a predetermined position in the engine room. Therefore, in order to temporarily fix the hose clamp to the hose tip, the hose clamp must be temporarily fixed in a state where the circumferential position of the diameter reducing means with respect to the tip of the hose is determined.

  Therefore, for example, Japanese Patent Application Laid-Open No. 2006-234022 or Japanese Patent Application Laid-Open No. 2007-016990 describes that an engagement protrusion protruding from a hose clamp is accommodated in an engagement recess formed in the hose. The hose clamp can be temporarily fixed to the hose in a state where the circumferential position of the operation screw with respect to the tip of the hose is positioned by the engagement between the engagement protrusion and the engagement recess.

Japanese Patent Application Laid-Open No. 08-082393 discloses that protrusions formed on both sides of the fixing member in the width direction are engaged with a pair of recesses formed in the clamp groove of the hose. The hose clamp can be temporarily fixed to the hose in a state where the circumferential position of the fixing member with respect to the tip of the hose is positioned by the engagement between the protrusion and the recess.
JP 2006-234022 JP 2007-016990 Japanese Patent Laid-Open No. 08-082393

  However, in the technique described in the above publication, the hose clamp is positioned by engaging the hose and the hose clamp so that the concave portion and the convex portion are not formed on the hose and the hose clamp, respectively. There was a problem that the structure became complicated. Moreover, since processing is also required for the hose clamp, it is difficult to use a commercially available hose clamp as it is, leading to an increase in cost. When the hose clamp is attached, it is necessary to reduce the diameter of the hose clamp to some extent so that it does not fall off from the hose, and the workability of insertion into the pipe is low.

  The present invention has been made in view of the above circumstances, and an object to be solved is to use a commercially available hose clamp as it is so that it can be temporarily fixed to the hose body with high positioning accuracy and without reducing the diameter.

The feature of the hose clamp holding structure of the present invention that solves the above problems is composed of a hose body and a ring part and an expansion / contraction adjustment part that expands or reduces the diameter of the ring part. A hose clamp holding structure comprising a hose clamp arranged in a diameter state,
On the outer periphery of the tip of the hose body, there is formed a holding convex portion having a holding groove portion that holds the ring portion, which is composed of a base portion protruding radially outward from the hose body and a protruding portion protruding from the base portion. It is in holding the part.

  In the hose clamp holding structure of the present invention, the ring portion of the hose clamp is sandwiched between the holding groove portions of the holding convex portion. Therefore, the movement of the hose clamp in the axial direction with respect to the hose body is restricted by the holding convex portion, and the movement in the circumferential direction is restricted by the frictional resistance caused by the holding groove portion being sandwiched. Thereby, the hose clamp is temporarily fixed to the hose body with high positioning accuracy, and the hose body can be easily and accurately assembled to the vehicle. Moreover, since a commercially available hose clamp can be used as it is, an increase in cost can be prevented. Furthermore, since the hose clamp can be temporarily fixed to the hose without reducing the diameter, the workability of insertion into the pipe as the mating member is improved.

  The hose body is made of an elastic body such as rubber or thermoplastic elastomer, and is formed by a mold. A ring-shaped clamp groove in which a hose clamp is disposed is generally formed on the outer periphery of the tip portion. Note that the hose clamp holding structure of the present invention does not necessarily include a clamp groove, and a hose body having no clamp groove can also be used.

  The hose clamp is a general one formed from a metal such as steel, and a ring portion arranged along the outer periphery of the ring groove formed in the hose body, and an expansion / contraction adjustment portion for expanding or reducing the diameter of the ring portion. And. Either a wire type hose clamp or a plate band type hose clamp can be used. Examples of the expansion / contraction adjustment unit include one that expands / contracts the ring portion by screwing with a bolt or the like, or one that holds the urging force in the diameter reduction direction by expanding the diameter.

  The feature of the present invention resides in that a holding projection is formed on the outer periphery of the tip of the hose body. This holding convex part is comprised from the base part which protrudes radially outward from a hose main body, and the protrusion part which has a holding groove part which protrudes from a base part and hold | maintains a ring part. As shown in the embodiment, the specific shape of the holding convex portion varies depending on the shape of the hose clamp, but the holding groove portion is formed so as to sandwich the ring portion. That is, by forming the diameter (width) of the holding groove portion to be smaller than the diameter (width) of the ring portion, the holding groove portion can sandwich the ring portion, and the relative movement in the circumferential direction is caused by the frictional resistance of both. Can be regulated. Further, the axial movement of the ring part is also restricted by the holding groove part.

  It is desirable that the outer periphery of the tip of the hose body has an auxiliary projection at a position different from the holding convex portion, and the auxiliary projection is engaged with an engaging portion formed on the ring portion. By doing in this way, since a hose clamp engages with a hose main body in two places, the position of a holding convex part, and the position of an auxiliary projection, it can prevent further temporarily stopping in the state where it inclined. It is desirable that the auxiliary protrusion is formed at an axially symmetric position with the holding convex portion with respect to the central axis of the hose body.

  In the case of a wire-type hose clamp, the engaging portion with which the auxiliary protrusion engages is between two turns of wire, and the auxiliary protrusion is inserted between the two turns of wire. In this case, processing of the hose clamp is unnecessary, and a commercially available product can be used as it is. Further, in the case of a plate band type hose clamp, the engaging portion can have the same shape as the through-hole formed in the ring portion or the holding convex portion.

  It is desirable that the expansion / contraction adjustment part is in contact with the base of the holding convex part. With this configuration, the hose clamp is further restricted from moving in the circumferential direction at the time of temporary fixing, and the hose clamp is moved by the holding convex portion during the operation of the expansion / contraction adjustment unit when the hose body is assembled to the pipe. Movement in the circumferential direction can be restricted.

  Hereinafter, the present invention will be described specifically by way of examples.

Example 1
2 and 3 show the hose clamp holding structure of the present embodiment. As shown in FIG. 1, the holding structure includes a hose body 1 and a wire-type hose clamp 2. The present embodiment relates to a holding structure for fastening an air cleaner hose of an automobile to a pipe extending from an air cleaner container.

  The hose body 1 made of a thermoplastic elastomer has a ring-shaped clamp groove 10 at the tip, and a holding projection 11 protruding from the clamp groove 10 is formed integrally with the hose body 1 at a part of the clamp groove 10. Has been. The holding projection 11 includes a thick base 12 and a pair of projections 13 projecting in parallel with the axial direction of the hose body 1 from the tip of the base 12 to both sides. Holding grooves 14 are formed on the lower surface of the portion 13, respectively. A groove 15 is formed at the center of the upper surface of the pair of protrusions 13. Further, auxiliary projections 16 projecting from the clamp groove 10 are formed at positions symmetrical to the holding convex portion 11.

  The hose body 1 is manufactured by molding, and the holding convex portion 11 is released from the mold by forcible removal. When forcibly removed, the pair of protrusions 13 are easily elastically deformed in the direction close to each other by the grooves 15 and can be released from the mold.

  The hose clamp 2 is a commercially available steel wire clamp, and includes a ring portion 20, a bolt 21, a fastening plate 22 screwed to the bolt 21, and a washer 23 fixed to the bolt 21. The bolt 21, the fastening plate 22, and the washer 23 constitute an expansion / contraction adjustment section referred to in the present invention. The ring part 20 uses one wire to wind one end to form a first ring part 24, and the other end is locked to the clamping plate 22, and the other end is a bolt 21 inside the washer 23. Then, the second ring portion 25 is formed by winding the first ring portion 24 at a predetermined interval to form the second ring portion 25, and the end portion is engaged with the fastening plate 22. In the hose clamp 2, the fastening plate 22 moves in a direction away from the washer 23 by rotating the bolt 21 clockwise, and the ring portion 20 is reduced in diameter. Further, by rotating the bolt 21 counterclockwise, the fastening plate 22 moves in a direction approaching the washer 23, and the ring portion 20 is expanded in diameter.

  The hose clamp 2 is in a diameter-expanded state in which the fastening plate 22 is close to the washer 23, and is inserted into the hose body 1 and disposed in the clamp groove 10. Then, the pair of projecting portions 13 of the holding convex portion 11 is press-fitted between the first ring portion 24 and the second ring portion 25, and the base portion 12 is connected to the first ring portion 24 and the second ring portion as shown in a sectional view in FIG. 3. It arrange | positions between the ring parts 25, and the 1st ring part 24 and the 2nd ring part 25 are engaging with the holding groove part 14, respectively. The diameter dimension of the holding groove portion 14 is set slightly smaller than the diameters of the first ring portion 24 and the second ring portion 25, and the first ring portion 24 and the second ring portion 25 are sandwiched between the holding groove portions 14. The auxiliary protrusion 16 is also disposed between the first ring portion 24 and the second ring portion 25 (engagement portion). In the hose clamp 2, the tip of the bolt 21 is in contact with one end surface of the holding convex portion 11.

  That is, in the hose clamp holding structure of the present embodiment, the base 12 and the auxiliary projection 16 are disposed between the first ring portion 24 and the second ring portion 25, so that the axial movement of the hose clamp 2 is restricted. Thus, there is no inconvenience such that the hose body 1 is inclined and temporarily fixed, and the hose body 1 does not fall off. And since the front-end | tip of the volt | bolt 21 contact | abuts to the end surface of the holding convex part 11, and the 1st ring part 24 and the 2nd ring part 25 are clamped by the holding groove part 14, and frictional resistance acts, the circumferential direction of the hose clamp 2 Movement is regulated.

  When the hose body 1 is assembled to the mating member, the bolt 21 is tightened after the hose body 1 is inserted into the mating member. At this time, since the tip of the bolt 21 is in contact with one end surface of the holding projection 11, the hose clamp 2 is prevented from moving relative to the hose body 1 in the circumferential direction, and the clamping plate 22 is removed from the washer 23. By moving away from the first ring portion 24, the first ring portion 24 and the second ring portion 25 are reduced in diameter, and the hose body 1 is securely fastened to the mating member.

  Therefore, according to the holding structure of the hose clamp of the present embodiment, the hose clamp 2 is temporarily fixed to the hose body 1 in a state where the hose clamp 2 is reliably positioned, so that the workability when the hose body 1 is assembled to the counterpart member is good. .

  In the present embodiment, the tip of the bolt 21 is in contact with one end surface of the holding convex portion 11, but the tip of the bolt 21 may be placed in the groove portion 15.

(Example 2)
FIG. 4 is a perspective view of the holding structure of the hose clamp according to the present embodiment, and FIG. This holding structure includes a hose body 1 similar to that of the first embodiment and a plate band type hose clamp 3 except that the shape of the holding convex portion is different.

  The clamp groove 10 of the hose body 1 has a holding projection comprising a pair of base portions 17 erected from both sides of the clamp groove 10 and a protruding portion 18 extending from the tip of each base portion 17 toward the clamp groove 10. The part is formed. The distance between the pair of base portions 17 is slightly smaller than the width dimension of the ring portion 30 of the hose clamp 3, and the holding groove portion referred to in the present invention is formed between the pair of base portions 17. Note that the tip of the protruding portion 18 is tapered so that the ring portion 30 of the hose clamp 3 can be easily inserted.

  A pair of auxiliary projections 19 having the same shape as the holding projection are formed on the clamp groove 10 of the hose body 1 on the side opposite to the holding projection.

  In this holding structure, the ring portion 30 of the hose clamp 3 is held between the pair of base portions 17, and the pair of projecting portions 18 covers the upper surface of the ring portion 30. On the opposite side, the auxiliary protrusion 19 is engaged with the ring portion 30. Accordingly, the movement of the hose clamp 3 in the axial direction is restricted, there is no problem that the hose clamp 3 is tilted and temporarily fixed with respect to the hose body 1, and the hose body 3 does not fall off.

  Further, the tip of the cylindrical portion 32 that holds the bolt 31 for expanding and contracting the ring portion 30 abuts on the pair of base portions 17 and the pair of projecting portions 18, and the ring portion 30 is sandwiched between the pair of base portions 17. Since the frictional resistance acts, the movement of the hose clamp 3 in the circumferential direction is restricted.

  When the hose body 1 is assembled to the mating member, the bolt 31 is tightened after the hose body 1 is inserted into the mating member. At this time, since the tips of the cylindrical portions 32 are in contact with the end surfaces of the pair of base portions 17 and the pair of protruding portions 18, the hose clamp 3 is prevented from moving relative to the hose body 1 in the circumferential direction. The ring portion 30 is reduced in diameter by moving one end of the ring portion 30 in the circumferential direction, and the hose body 1 is securely fastened to the mating member.

  Therefore, according to the holding structure of the hose clamp of the present embodiment, the hose clamp 3 is temporarily fixed to the hose body 1 in a state where the hose clamp 3 is reliably positioned, so that workability when assembling the hose body 1 to the mating member is good. .

  The hose clamp holding structure of the present invention can be used not only for automobile air cleaner hoses but also for various applications as long as a soft hose body formed of thermoplastic elastomer or rubber is connected to a mating pipe with a hose clamp. be able to.

It is a disassembled perspective view of the holding structure which concerns on one Example of this invention. It is a perspective view of the holding structure concerning one example of the present invention. It is principal part sectional drawing of the holding structure which concerns on one Example of this invention. It is a perspective view of the holding structure concerning the 2nd example of the present invention. It is principal part sectional drawing of the holding structure which concerns on the 2nd Example of this invention.

Explanation of symbols

1: Hose body 2, 3: Hose clamp
11: Holding convex part 12: Base part 13: Protruding part
14: Holding groove 20: Ring

Claims (5)

A hose clamp comprising: a hose body; a hose clamp including a ring portion and an expansion / contraction adjustment portion that expands or contracts the diameter of the ring portion, and the ring portion is disposed in an expanded state on the outer periphery of the tip of the hose body Holding structure,
The outer periphery of the tip of the hose body has a holding groove for holding the ring part, which includes a base protruding radially outward from the hose body and a protruding part protruding in the axial direction of the hose from the base. A holding structure for a hose clamp, wherein a convex portion is formed, and the holding groove portion sandwiches the ring portion.   2. The hose according to claim 1, wherein an outer periphery of a tip of the hose body has an auxiliary projection at a position different from the holding convex portion, and the auxiliary projection is engaged with an engaging portion formed on the ring portion. Clamp holding structure.   The hose clamp is a wire-type hose clamp, and the ring portion has two winding wires facing each other, and the holding convex portion protrudes from the base portion disposed between the wires and the top portion of the base portion. The hose clamp holding structure according to claim 1 or 2, comprising a pair of protrusions having a pair of holding groove portions for holding the wires.   The hose clamp holding structure according to claim 3, wherein a groove portion is provided between the pair of protrusions so that the pair of protrusions can be elastically deformed in a direction close to each other.   The hose clamp is a plate band type hose clamp, the ring part is plate-shaped, and the holding convex part protrudes from both sides of the ring part and the top part of the pair of base parts to the ring part The hose clamp holding structure according to claim 1 or 2, comprising the protruding portions protruding so as to cover the surface of the hose.

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