JP3938994B2 - Hose guide clamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hose guide clamp for guiding a hose to be bent substantially at a right angle.
[0002]
[Prior art and problems]
Conventionally, as this type of clamp, for example, Japanese Utility Model Publication No. 63-75679 is known. FIG. 9 is a perspective view showing a state in which the conventional hose 100 is held by the clamp 110. In FIG. 9, the clamp 110 includes an L-shaped clamp main body 112, and a storage groove 114 for storing the hose 100 is formed in the clamp main body 112. The storage groove 114 is a semicircle in which the upper part of a substantially circular cross section is cut out, and the hose 100 is inserted from the insertion port 114a on the upper part. The hose 100 is prevented from coming out of the storage groove 114 by pressing the hose 100 at the opening end 114b of the insertion port 114a.
[0003]
By the way, when the hose 100 is bent along the storage groove 114, the shape of the hose 100 becomes flat in cross section. When the hose 100 having such a flat cross section is stored in the storage groove 114 having a circular cross section, a gap is generated depending on the position of the storage groove 114, that is, a large gap is likely to be generated at the corner portion 114c, and this portion is easily removed. In this case, if the gap between the corner portions 114c is narrowed, not only is the operation of inserting the hose 100 difficult, but the hose 100 is crushed and a predetermined air flow rate cannot be obtained. Conversely, when the cross-sectional area of the storage groove 114 is increased and the insertion port 114a is narrowed, the operation of inserting the hose 100 is troublesome. As described above, there is a problem that it is difficult to simultaneously achieve the three requirements of ensuring the insertion workability of the hose 100, holding force, and flow rate.
[0004]
As another conventional technique, a technique described in Japanese Utility Model Publication No. 64-7979 is also known. That is, as shown in FIG. 10, the clamp 120 includes a clamp body 121. A guide groove 121a having a U-shaped cross section is formed in the clamp main body 121, and the middle thereof is bent and formed with a predetermined curvature. Further, a guide part 121 b is formed in a bent part of the clamp body 121. Furthermore, clamp portions 121 c are formed on both sides of the clamp body 121. A hook portion 121d is formed on the upper portion of the clamp portion 121c. The guide part 121b and the clamp part 121c are connected by a connecting part 121f. In this clamp 120, the hose 122 accommodated in the guide groove 121a is stopped at the clamp portions 121c on both sides.
[0005]
However, also in this clamp 120, the hose 122 can be easily pulled out at the portion of the guide portion 121b as in the prior art of FIG. 9, and both the workability of inserting the hose 122 and the holding force at the portion of the clamp portion 121c are compatible. There was a problem that it was difficult to plan.
[0006]
The present invention solves the above-mentioned problems of the prior art, and in a clamp that guides the hose so as to be bent substantially at a right angle, the hose satisfying the requirements of securing the hose, insertion workability, and ensuring a predetermined flow rate. An object is to provide a guide clamp.
[0007]
[Means for solving the problems and their functions and effects]
The present invention made to solve the above problems
In the hose guide clamp that guides the hose so that it bends substantially at right angles,
A clamp body having a storage groove that fits into the bent part of the hose, and a corner portion that guides the hose to be bent in a substantially right angle direction by storing the hose in the storage groove;
Clamp portions provided on both sides of the corner portion, the hose being connected to each other in the vicinity of the opening portion led out from the storage groove,
With
The storage groove is formed following the outer shape of the hose that is flat, in a state where the hose is bent at a substantially right angle without being inserted into the storage groove and flattened .
The clamp part is
Protruding from the upper end of the opening toward the storage groove, and having a retaining claw formed to prevent the hose from falling off the storage groove by pressing the upper side surface of the hose,
The retaining pawl is protruded so as to bite into the upper side of the hose to the inside of the hose beyond the outer shape of the hose stored in the storage groove;
It is characterized by.
[0008]
In the hose guide clamp according to the present invention, the hose is housed in the housing groove formed in the clamp body. The storage groove has a shape bent at a substantially right angle at the corner of the clamp body. When the hose is stored in the storage groove, the hose is bent at a substantially right angle following the storage groove. Further, the cross-sectional shape of the storage groove follows the outer shape when the hose is bent substantially at a right angle. In other words, when the hose is bent at a right angle, the cross-sectional shape of the hose becomes a shape that is slightly crushed in the lateral direction. By matching the shape of the storage groove with this external shape, the hose is in close contact with the storage groove. It is held in the state. Therefore, the hose is crushed and the flow path is not narrowed, and a predetermined flow rate can be secured.
[0009]
Further, the hose is secured by a retaining claw of a clamp portion for preventing the hose from falling off the storage groove. That is, the clamp part is formed with a retaining claw from the upper end on both sides of the opening of the storage groove toward the storage groove. This retaining claw prevents the hose from coming out of the storage groove by pressing the middle part of the hose. As a means for preventing the hose from coming out of the storage groove in this way, only the retaining claw in the clamp portion is used, and the portion of the clamp body follows the shape of the hose, so a large force for pushing in this portion is used. It is not necessary, so it is excellent in hose installation workability.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In order to further clarify the configuration and operation of the present invention described above, preferred embodiments of the present invention will be described below.
[0011]
FIG. 1 is a perspective view showing a clamp 20 holding a hose 10 according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the clamp 20. 1 and 2, a clamp 20 is used to bend an air hose for operating a negative pressure valve or the like in an automobile engine room. The clamp 20 has a storage groove 21 whose upper portion is an insertion opening 21a, is bent at a right angle with a predetermined radius of curvature, and includes a clamp body 22 having a corner portion 23, and the clamp body. The clamp portion 24 is formed integrally with both ends of the clamp 22.
[0012]
3 is a cross-sectional view taken along line 3-3 in FIG. 2, which is a portion of the clamp body 22, FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. 2, which is a portion of the clamp portion 24, and FIG. FIG. 6 is a cross-sectional view in which the hose 10 is housed in the clamp portion 24. As shown in FIGS. 3 and 5, the inner wall surface of the storage groove 21 in the clamp body 22 is slightly smaller than the outer diameter r1 (see FIG. 5 ) of the hose 10 and a semicircular portion 21b having a radius R1 from the center O1. The outer circumferential surface is formed with a radius R2 from the center O1 while being combined with the parallel groove portion 21c at the upper part of the semicircular portion 21b to form a U-shaped cross section. That is, the storage groove 21 is formed to have a radius R1 slightly smaller than the outer diameter r1 of the hose 10, and when the hose 10 is bent at a substantially right angle, the hose 10 has an outer shape slightly crushed in the lateral direction. The shape follows this outer shape.
[0013]
As shown in FIGS. 4 and 6, the storage groove 21 in the portion of the clamp portion 24 has an inner wall surface that is a semicircle having a radius R1 from the center O1, while an outer wall surface is formed from the center O2 to the radius R2. Has been. That is, the outer wall surface of the clamp part 24 is formed in a semicircle centered on the center O2 that is eccentric upward with respect to the center O1 of the inner wall surface. It is different from the upper part. Further, on both sides of the upper portion of the clamp portion 24, retaining claws 24a and 24a formed toward the storage groove 21 side are formed. The retaining claws 24 a and 24 a are for preventing the hose 10 from coming off by pressing the side wall surface of the hose 10. That is, because the depth h1 of the storage groove 21 is shallower than the diameter (r1 × 2) of the hose, the retaining claws 24a and 24a press against the upper side surface of the hose 10 to prevent the hose 10 from being removed. In addition, the front-end | tip part of the retaining claws 24a and 24a is a curved surface so that the outer wall surface of the hose 10 may not be damaged.
[0014]
Further, as shown in the plan view of FIG. 7, the clamp 20 is L-shaped so as to change the direction of the hose 10 to a right-angle direction, and a bending radius Rt at the center line of the storage groove 21 at the corner portion 23. It has become.
[0015]
In the above-described embodiment, the hose 10 is bent and stored by the clamp 20 by bending the hose 10 substantially at a right angle and pushing the hose 10 through the insertion opening 21 a of the clamp 20. The hose 10 is deformed to be slightly flat in the vertical direction by being bent at a substantially right angle while being stored in the storage groove 21. However, the amount of deformation of the hose 10 at this time is such that substantially the same air flow rate as that when the hose 10 is straight is passed. That is, the shape of the storage groove 21 is formed in a shape following the cross-sectional shape when the hose 10 is bent, and the hose 10 is not further deformed when stored in the storage groove 21. Therefore, a part of the hose 10 is narrowed and the flow rate flowing through the hose 10 is not reduced.
[0016]
In addition, the shape of such a storage groove | channel 21 can be calculated | required by the following experiment. That is, when the hose 10 is in a straight state, a negative pressure is applied, the flow rate at that time is measured, the hose 10 is further bent, and the minimum radius Rt in the case where almost the same flow rate as that of the straight hose 10 can be secured. Check out. And the cross-sectional shape of the hose in the state of radius Rt can be calculated | required, and the shape of the accommodation groove | channel 21 can be defined according to this cross-sectional shape.
[0017]
By the way, in order to pipe the hose 10 in the engine room, it is necessary to bend it with a small radius Rt even in a narrow place so as not to hit other members. For example, as shown in FIG. 8, in order to form the hose 10 so as to be bent at a right angle at a distance a1 (26 mm), an insertion allowance a2 (10 mm) for inserting the hose 10 is necessary. Therefore, the minimum bending radius Rt at the center of the hose 10 needs to be 11 mm or less. In this way, when the hose 10 is bent at the radius Rt, the thickness of the hose 10 capable of flowing the same flow rate as the straight state of the hose is obtained. And the external shape in the state which bent this hose 10 with the radius Rt is calculated | required, and the accommodation groove | channel 21 is formed according to this external shape.
[0018]
Further, when the hose 10 is housed in the clamp 20, the hose 10 is bent substantially at a right angle and pushed from above the housing groove 21, but the cross-sectional shape of the housing groove 21 is the shape when the hose 10 is bent. Since it is copied, the storage groove 21 is expanded so that the retaining claws 24a, 24a are slightly expanded. However, the hose 10 is not pushed into the storage groove 21 in other portions smoothly. Can be stored. Therefore, a large force is not required to store the hose 10 in the clamp 20, and the hose 10 can be easily stored in a state of being in close contact with the storage groove 21.
[0019]
Further, as a means for preventing the hose 10 from coming off the clamp 20, the outer claws 24 a, 24 a are pressed against the outer surface of the middle of the hose 10 to slightly bite, so that the hose 10 is accommodated in the storage groove. Therefore, it is possible to reliably prevent the slippage in 21 and the removal from the storage groove 21. In addition, since the front-end | tip part of the retaining claws 24a and 24a is a curved surface, the outer wall surface of the hose 10 is not damaged.
[0020]
Furthermore, the clamp 20 uses 6-nylon resin and a material mixed with 30% glass filler, thereby obtaining excellent heat resistance, and does not change over time even in an atmosphere of about 120 ° C. in the engine room. .
[0021]
The present invention is not limited to the above embodiment, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.
[0022]
(1) In addition to the materials described above, the clamp material is not particularly limited depending on the application, and other materials may include 12 nylon, 66 nylon, polyacetal, polyethylene, and the like.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a clamp 20 holding a hose 10 according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a clamp 20;
3 is a cross-sectional view taken along line 3-3 in FIG.
4 is a cross-sectional view taken along line 4-4 of FIG.
5 is a cross-sectional view showing a state where the hose 10 is housed in the clamp body 22. FIG.
6 is a cross-sectional view showing a state where the hose 10 is housed in the clamp portion 24. FIG.
7 is a plan view showing a state where the hose 10 is stored in the clamp 20. FIG.
FIG. 8 is an explanatory view showing a state in which the hose 10 is bent by the clamp 20 and used.
9 is a perspective view showing a state in which a hose 100 according to a conventional technique is held by a clamp 110. FIG.
10 is a perspective view showing a state in which a hose 122 according to another conventional technique is held by a clamp 120. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Hose 20 ... Clamp 21a ... Opening 21 for insertion ... Storage groove 21b ... Semicircle part 21c ... Parallel groove part 22 ... Clamp body 23 ... Corner part 24 ... Clamp part 24a, 24a ... Stop nail

Claims (1)

In the hose guide clamp that guides the hose so that it bends substantially at right angles,
A clamp body having a storage groove that fits into the bent part of the hose, and a corner portion that guides the hose to be bent in a substantially right angle direction by storing the hose in the storage groove;
Clamp portions provided on both sides of the corner portion, the hose being connected to each other in the vicinity of the opening portion led out from the storage groove,
With
The storage groove is formed following the outer shape of the hose that is flat, in a state where the hose is bent at a substantially right angle without being inserted into the storage groove and flattened .
The clamp part is
Protruding from the upper end of the opening toward the storage groove, and having a retaining claw formed to prevent the hose from falling off the storage groove by pressing the upper side surface of the hose,
The retaining pawl is protruded so as to bite into the upper side of the hose to the inside of the hose beyond the outer shape of the hose stored in the storage groove;
Hose guide clamp characterized by

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