JP3654573B2 - Hose clamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a hose clamp having a temporary fixing function among hose clamps for fastening a rubber hose or the like to an end portion of a connection pipe.
[0002]
[Prior art]
As a conventional hose clamp of this type, for example, there is one shown in Japanese Utility Model Laid-Open No. 2-25796.
Although this conventional hose clamp is not specifically shown, a clamp body constituted by an annular tightening ring portion and a pair of grip portions, and a holder for holding the pair of grip portions close to each other. It has. In a state where the pair of grip portions are held by the holder, the diameter of the tightening ring portion is increased. After inserting the rubber hose into the tightening ring portion and fitting the rubber hose to the end of the connection pipe in this state By removing the holder from the grip portion and opening the pair of grip portions, the fastening ring portion is reduced in diameter by its own elastic force, and the rubber hose is fastened and fixed to the connection pipe.
[0003]
Further, two presser arms are extended from the holder, and these two presser arms are configured to be in elastic contact with the peripheral surface of the rubber hose inserted into the tightening ring portion.
Therefore, even if the conventional hose clamp is a relatively small diameter rubber hose, the rubber hose is sandwiched between the tightening ring and the presser arm and temporarily fixed. Even when fitted into the pipe, there is an advantage that the fastening operation can be stably performed without inadvertent movement.
[0004]
[Problems to be solved by the invention]
However, in the conventional hose clamp described above, since the two presser arms are arranged on the outer side (the outer side in the axial direction) of the tightening ring portion, when inserting the rubber hose into the tightening ring portion, The rubber hose is brought into contact with the presser arm and the presser arm is flexed flexibly, and then the rubber hose is inserted through the clamping ring, and then the other presser arm is brought into contact with the presser arm to flex flexibly. did not become.
[0005]
That is, before and after inserting the rubber hose into the tightening ring portion, these two presser arms are in the way, and the insertion work into the tightening ring portion is troublesome.
The present invention has been made in view of such circumstances, and an object thereof is to provide a hose clamp having a temporary fixing function and capable of easily inserting a tightening object such as a rubber hose into a tightening ring portion.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a guide groove is formed in an annularly curved fastening ring portion, one end portion is disposed in the guide groove, and both end portions are provided. A grip body is formed, and the clamp body in which the diameter of the tightening ring part is expanded by bringing the grip parts close to each other, and the grip body of the clamp body is externally fitted to hold the approaching state of the part. And a holder body from which a temporary fixing arm extends, and the temporary fixing arm has a shape in which the intermediate portion is curved and the intermediate portion enters the hollow portion of the tightening ring portion from the guide groove. It is characterized by that.
[0007]
According to a second aspect of the present invention, on the premise of the first aspect, the temporary fixing arm has a cross-sectional shape in which at least a region entering the hollow portion of the tightening ring portion is bent or curved with the center at the top. Features.
[0008]
According to a third aspect of the present invention, on the premise of the first or second aspect, a tip end portion of the temporary fixing arm is exposed from the guide groove.
[0009]
According to a fourth aspect of the present invention, on the premise of the third aspect, a tip end portion of the temporary fixing arm is wider than the guide groove.
[0010]
Therefore, in the invention of claim 1, a tightening object such as a rubber hose is inserted into the tightening ring portion of the clamp body from one end opening, and is passed through the side of the temporary fixing arm in the tightening ring portion to tighten. Since it suffices to pull it out from the opening at the other end of the attached ring part, it is easy to insert the rubber ring into a fastening ring part such as a rubber hose.
[0011]
Further, according to the invention of claim 2, when the edge portion of the temporary fixing arm has escaped in the outer diameter direction of the tightening ring portion, and a relatively large diameter rubber hose or the like is inserted into the tightening ring portion, A rubber hose or the like abuts against an inclined surface or a curved surface formed in the intermediate portion of the temporary fixing arm. Accordingly, the insertion pressure of the rubber hose or the like acts on the inclined surface or the curved surface, and the intermediate portion of the temporary fixing arm can be bent in the outer radial direction of the tightening ring portion by the radial component of the acting force. For this reason, even if a relatively large diameter rubber hose or the like is to be tightened, the temporary fixing arm can be easily inserted into the tightening ring portion without becoming a barrier.
[0012]
According to the invention of claim 3, by manipulating the tip end portion of the temporary fixing arm exposed to the outside from the guide groove of the clamp body, the intermediate portion disposed in the hollow portion of the tightening ring portion can be easily bent. Since the insertion track of the rubber hose and the like can be secured in the tightening ring portion, even when a relatively large diameter rubber hose or the like is to be tightened, the insertion work to the tightening ring portion can be performed more easily. .
[0013]
According to invention of Claim 4, it can prevent reliably that the front-end | tip part of a temporary fix arm enters into the hollow part of a clamping ring part from a guide groove, Regardless of the mounting state to the clamp body of a holder body, the above-mentioned The operation according to the invention of claim 3 can be compensated.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 3 are views showing a hose clamp according to an embodiment of the present invention. FIG. 1 is a perspective view of the hose clamp, FIG. 2 (A) is a perspective view of a clamp body, and FIG. 2 (B) is a hose. FIG. 3 is a cross-sectional view for explaining the operation of the hose clamp.
[0015]
As shown in these drawings, the hose clamp according to the embodiment of the present invention includes a clamp body 1 and a holder body 2.
As shown in FIG. 2A, the clamp body 1 is made of a metal strip having a guide groove 10 cut out to a required length from near one end, and the metal strip is bent into an annular shape. A fastening ring portion 11 is formed, and both end portions are bent outward to form a grip portion 12. A region 13 extending from one end to a required length is formed to be narrower than the guide groove 10, and the region 13 is disposed in the guide groove 10 so that both ends intersect each other. In the clamp body 1, the clamping ring portion 11 is elastically expanded in diameter as shown in FIG.
The clamp body 1 can also have a two-layer structure in which an annular reinforcing plate (not shown) is superposed on the outside in order to increase the fastening force.
[0016]
The holder body 2 is formed of a resin material in the present embodiment, and has a structure in which a base portion 20 and one temporary fixing arm 21 extending from the base portion 20 are integrally formed. The base portion 20 is formed with a groove 22 into which the grip portions 12 of the clamp body 1 that are brought close to each other can be fitted, and a projection 23 that is used when the fitting state of the grip portion 12 is released using a tool such as a pliers. is there.
[0017]
The temporary fixing arm 21 extending from the base portion 20 is curved, and the intermediate portion 21a can be inserted into the guide groove 10 with a width corresponding to the width of the guide groove 10 formed in the clamp body 1 (that is, without rattling). Width). For example, the width of the intermediate portion 21 a is formed to be narrower by about 0.1 mm than the width of the guide groove 10. The intermediate portion 21a of the temporary fixing arm 21 is in a state in which the base portion 20 is externally fitted to the grip portions 12 of the clamp body 1 that are brought close to each other (hereinafter, also referred to as “mounted state on the clamp body 1”). It arrange | positions in the hollow part of the clamping ring part 11 through the groove | channel 10 (refer FIG. 1, FIG. 3 (A)).
Here, since the intermediate portion 21a of the temporary fixing arm 21 is formed to have a width corresponding to the width of the guide groove 10, the guide groove is also inserted when the rubber hose is inserted into the hollow portion of the tightening ring portion 11 as described later. 10 is supported stably without rattling. Therefore, there is no fear that the base 20 of the holder body 2 fitted on each grip portion 12 of the clamp body 1 may be inadvertently detached due to rattling of the temporary fixing arm 21, and the rubber hose can be inserted stably. it can.
[0018]
Further, as shown in FIG. 1 or FIG. 2B, the temporary fixing arm 21 is bent and formed in a V-shaped cross section with the substantially center of the cross section as the top. It should be noted that such bending may be performed only in the region disposed in the hollow portion of the tightening ring portion 11, and the other regions may have any cross-sectional shape in consideration of ease of molding and imparting strength. be able to. In the figure, the cross section is bent in a V-shape, but in addition to this, for example, a cross section having a curved shape with the substantially center of the cross section as a top may be used. In short, it is only necessary to have a cross-sectional shape in which the center of the cross section is disposed closest to the center of the tightening ring portion 11 and the edge escapes in the outer diameter direction when disposed in the hollow portion of the tightening ring portion 11.
[0019]
Further, the temporary fixing arm 21 has a dimensional shape in which the distal end portion 21b is exposed from the guide groove 10 of the clamp body 1 in the mounted state on the clamp body 1, and the distal end portion 21b is formed wider than the guide groove 10. (See FIG. 1).
[0020]
As shown in FIG. 2 (B), the hose clamp having the above-described configuration presses the grip portions 12 of the clamp body 1 in directions close to each other and elastically expands the fastening ring portion 11 in this state. The base portion 20 of the holder body 2 is fitted on each grip portion 12 to maintain the diameter-enlarged state of the tightening ring portion 11. Then, as shown in FIG. 3 (A), a fastening object such as a rubber hose (hereinafter, described as a rubber hose 30) is inserted into the hollow part of the fastening ring part 11 from one end opening, and the side of the temporary fixing arm 21 is inserted. A hose clamp can be disposed on the outer periphery of the rubber hose 30 by slipping through and pulling out from the opening at the other end.
[0021]
When the diameter of the rubber hose 30 is larger than the distance D between the inner wall of the tightening ring portion 11 and the temporary fixing arm 21 (see FIG. 3A), the tip of the rubber hose 30 is inside the hollow portion of the tightening ring portion 11. Hits the intermediate portion 21a of the temporary fixing arm 21, but if the rubber hose 30 is further pushed in, the tip of the rubber hose presses the inclined surface formed from the center of the temporary fixing arm 21 to the edge, and the radial component force of the pressing force The temporary fixing arm 21 is bent in the outer diameter direction, and the insertion track of the rubber hose 30 is secured.
[0022]
When the rubber hose 30 has a large diameter and its peripheral edge is located outside the edge of the temporary fixing arm 21 in the hollow portion of the tightening ring portion 11 or when the rubber hose 30 is inserted more comfortably, the guide groove What is necessary is just to raise the front-end | tip part 21b of the temporary fix | stop arm 21 exposed from 10 moderately. By this operation, the intermediate portion 21a of the temporary fixing arm 21 is bent in the outer diameter direction, so that the insertion track of the rubber hose 30 can be easily secured.
[0023]
As described above, when the temporary fixing arm 21 is bent and the rubber hose 30 is inserted, the temporary fixing arm 21 presses the peripheral surface of the rubber hose 30 and presses it against the inner wall of the tightening ring portion 11. It is securely fixed (temporarily fixed) to the required position.
[0024]
On the other hand, when the diameter of the rubber hose 30 is smaller than the distance D between the inner wall of the tightening ring portion 11 and the temporary fixing arm 21 (see FIG. 3A), the tightening ring without contacting the temporary fixing arm 21. The rubber hose 30 can be inserted into the portion 11. Also in this case, since the clearance between the inner wall of the tightening ring portion 11 and the rubber hose 30 is narrow due to the presence of the temporary fixing arm 21, the clamp body 1 is only slightly inclined with respect to the rubber hose 30. The hook is generated without greatly changing the posture, and the hose clamp can be held at a required position.
[0025]
With the hose clamp temporarily fixed as described above, after fitting the end of the rubber hose 30 into the connection pipe, the base 20 of the holder body 2 is removed from the grip portion 12 of the clamp body 1 as shown in FIG. Remove. This operation is performed by gripping and pulling off the protrusion 23 formed on the base 20 with a tool such as a pliers.
Further, the tip end portion 21b of the temporary fixing arm 21 can be used as a knob when the holder body 2 is removed from the grip portion 12 on condition that sufficient strength is given to the temporary fixing arm 21. That is, the holder body 2 can be removed by pulling up the tip end portion 21b of the temporary fixing arm 21 without requiring a special tool such as a pliers.
[0026]
When the holder body 2 is removed from the grip part 12, the fastening ring part 11 of the clamp body 1 is reduced in diameter by its own elastic force, and the rubber hose 30 is fastened and fixed to the connection pipe.
In the present embodiment, since the holder body 2 is formed of a resin material, the base 20 can be detached from the grip portion 12 of the clamp body 1 with a weaker force than when the holder body 2 is formed of a metal material. Further, even if the temporary fixing arm 21 is elastically pressed against the rubber hose 30 in the hollow portion of the tightening ring portion 11, the rubber hose 30 is hardly damaged due to the flexibility of the resin material. Furthermore, it is easy to give a conspicuous color to the holder body 2, and it is effective in preventing forgetting to remove the holder body 2.
[0027]
On the other hand, the holder body 2 can also be formed of a metal material as shown in FIGS. Also in this case, the temporary fixing arm 21 is bent and extended from the base portion 20 of the holder body 2, and the temporary fixing arm 21 is tightened through the guide groove 10 when the intermediate portion 21 a is attached to the clamp body 1. It is made into the dimension shape which is arrange | positioned in the hollow part of the attachment ring part 11, and the front-end | tip part 21b is exposed from the guide groove 10 of the clamp main body 1. FIG. Further, the temporary fixing arm 21 is formed in a cross-sectional shape that is bent or curved with the substantially center of the cross-section as the top.
[0028]
【The invention's effect】
As described above, according to the present invention, the intermediate portion of the temporary fixing arm is curved, and the intermediate portion enters the hollow portion of the tightening ring portion from the guide groove of the clamp body. It is possible to easily insert a tightening target such as a rubber hose into the tightening ring portion while providing a function.
[Brief description of the drawings]
FIG. 1 is a perspective view of a hose clamp according to an embodiment of the present invention.
2A is a perspective view of a clamp body, and FIG. 2B is an exploded perspective view of a hose clamp.
FIG. 3 is a cross-sectional view for explaining the operation of a hose clamp.
FIG. 4 is a perspective view of a hose clamp according to another embodiment of the present invention.
5 is a cross-sectional view of the hose clamp shown in FIG.
[Explanation of symbols]
1: Clamp body 2: Holder body 10: Guide groove 11: Fastening ring portion 12: Grip portion 20: Base portion 21: Temporary fixing arm 22: Groove 23: Projection

Claims (3)

A guide groove is formed in an annularly curved fastening ring portion, and one end portion is disposed in the guide groove, and grip portions are formed at both end portions, and the grip portions are brought close to each other. A clamp body in which the diameter of the tightening ring portion is expanded,
It is fitted to each grip part of the clamp body and holds the approaching state of the same part, and includes a holder body from which a temporary fixing arm extends.
The temporary fixing arm has a curved intermediate portion, a shape in which the intermediate portion enters the hollow portion of the fastening ring portion from the guide groove, and at least a region that enters the hollow portion of the fastening ring portion is substantially A hose clamp characterized by having a cross-sectional shape bent or curved with the center at the top. A guide groove is formed in an annularly curved fastening ring portion, and one end portion is disposed in the guide groove, and grip portions are formed at both end portions, and the grip portions are brought close to each other. A clamp body in which the diameter of the tightening ring portion is expanded,
It is fitted to each grip part of the clamp body and holds the approaching state of the same part, and includes a holder body from which a temporary fixing arm extends.
The temporary fixing arm has a curved intermediate portion, and a shape in which the intermediate portion enters the hollow portion of the tightening ring portion from the guide groove, and a distal end portion from the guide groove in the mounting state on the clamp body. A hose clamp that is exposed.   The hose clamp according to claim 2, wherein a tip end portion of the temporary fixing arm is wider than the guide groove.

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