JP2523248Y2 - Hose clamp - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hose clamp.

[0002]

2. Description of the Related Art A spring clamp type hose clamp used for connecting a rubber hose to, for example, a pipe of a radiator at the time of mounting parts of an automobile is conventionally known, for example, of the type shown in FIGS. There was the type shown in FIG.

First, the hose clamp shown in FIGS. 8 and 9 will be described. The hose clamp 1 is provided with extending pieces 3, 4 extending in the circumferential direction of the band-shaped leaf spring body 2 at both ends of an annular band-shaped leaf spring body 2, respectively. The distal ends of the belt springs 3 and 4 are bent outward along the radial direction of the belt-shaped leaf spring main body 2 to form temporary fixing portions 5 and 5. Further, in a state where the diameter of the band-shaped leaf spring body 2 is expanded, the temporarily fixed portions 5, 5 facing each other are temporarily fixed by the holder 6 having a U-shaped cross section as shown in FIG. The holder 6 is positioned and the holder 6 is removed using a suitable tool such as pliers.

[0004] Since the hose clamp can be delivered in a temporarily fixed state, the delivery destination can be handled simply by removing the holder when using the clamp. However, since a holder separate from the main body of the band-shaped leaf spring is used, the following problems have been encountered.

That is, the first problem is that the number of manufacturing and assembling steps is increased, and the holder is discarded at the time of use, which leads to an increase in cost. The third problem is that when the user tries to remove it, it is repelled by the strong elastic force of the belt-shaped leaf spring body and may injure the operator. Otherwise, when the hose is replaced later, the clamp cannot be temporarily fixed.

Next, the hose clamp shown in FIGS. 10 and 11 will be described. The hose clamp 7 has a groove-shaped notch formed in an annular shape with both ends facing each other and inserted into a portion opposite to the extension piece so that the extension piece forms the same peripheral surface when in a free state. Belt-shaped leaf spring body 9 provided with portion 8
And a stopper portion 10 which is integrally formed on one end side of the band-shaped leaf spring main body 9 along its circumferential direction, and is bent outward at a tip thereof along the radial direction of the band-shaped leaf spring main body 9. And an extension piece 12 provided with a notch 11 in the stopper portion 10 and a distal end of the other end of the band-shaped leaf spring main body 9 formed by bending outward in the radial direction. A notch portion 13 slightly wider than the width of the extension piece 12 is provided, and the hook portion 14a at the tip of the notch portion 13 is provided with the stopper portion 1a.
Receiving piece 15 provided with locking projection 14 hooked to notch 11
It consists of:

In order to temporarily fix the hose clamp 7, the diameter of the band-shaped leaf spring body 9 is increased, and the locking projection 1
The hook portion 14a of the fourth member is hooked on the notch 11 of the stopper portion 10 of the extension piece 12. When the locked state is released, an external force is applied so that the hook 14a comes off the notch 11.

However, such a hose clamp must be carried out using a special tool at a factory in order to make the hose in a temporary fixing state. It is extremely difficult to return. It is also very difficult to release the temporarily fixed state.

The present inventor has previously devised the hose clamps shown in FIGS. 12 to 18 as a hose clamp which has improved the above-mentioned drawbacks of the conventional hose clamps and has improved usability. 3-72890).

It is formed in an annular shape with both ends facing each other,
A groove-shaped notch 17 is inserted into the opposite side of the extension piece so that the extension piece forms the same peripheral surface when in a free state.
And between the notch 17 and the extension piece described later,
Along the length direction, both ends are formed integrally with a band-shaped leaf spring main body 19 provided with an arrow-shaped band-shaped ridge, on one end side of the band-shaped leaf spring main body 19 along its circumferential direction, The tip is bent outward in the radial direction of the band-shaped leaf spring main body 19 to form a stopper portion 20, and is erected toward the outside of the band-shaped leaf spring main body 19 on both sides in the width direction; An extension piece 22 provided with a pair of locking projections 21, 21, each of which has a part 21 a, 21 a of a standing tip protruding toward the stopper section 20 at a required inclination angle, and an extension piece 22 of the band-shaped leaf spring body 19. At the other end, a notch 23 which is formed to be bent outward in the radial direction and is slightly wider than the width of the extending piece 22 is provided. An interval corresponding to the interval between the pieces 21, 21, and the depth increases toward the top of each. A hose clamp consisting of a notch 26 provided with the receiving piece 27. On the engaging groove 25, 25 provided with a locking groove 25, 25 is inclined to the required angle so as to be. In the drawings, H indicates a hose.

In order to temporarily fix the hose clamp, the diameter of the band-shaped leaf spring body 19 is increased by using an appropriate tool, and the band-shaped leaf spring body 19 is extended from both sides of the extension piece 22.
The notches 23 in the receiving piece 27 are passed through the locking projections 21, 21 standing outside. Then, when the force for expanding the diameter of the band-shaped leaf spring body 19 is released,
The inclined protruding portions 21a, 21a of the distal end portions of the locking projections 21, 21 are locked in the locking grooves 25, 25 of the receiving piece 27, and are in a temporarily fixed state. Then, in the temporarily fixed state, the inclined protruding portions 21a, 21a of the tips of the locking protruding pieces 21, 21 are engaged with the locking grooves 25, 25 by the force of the belt-shaped leaf spring body 19 to expand the diameter. Is pushed into the deepest part, so that it does not come off easily even if shock or vibration is applied. and again,
In order to release the temporarily fixed state, the inclined protruding portions 21a, 21a of the tips of the locking projections 21, 21 may be removed from the locking grooves 25, 25 by using a driver D or the like. Is released, and the temporarily fixed state is released.

According to the hose clamp, the following effects can be expected. (1) Since it is not necessary to separately manufacture the holder for temporary fixing, it is economical and does not cause various inconveniences when it is lost. Further, the fear of injury due to the holder being repelled when the holder is removed is eliminated. (2) Even when the locked state is released once at the site,
Even if there is no great tool, it is easy to make the temporary fixing state again by using the tool at the site. (3) While an inclined projection is provided at the tip of the locking projection,
The locking groove provided in the receiving piece is also inclined so as to become deeper toward the upper part, so that the locking becomes stronger and the locking groove does not easily come off due to impact, vibration, or the like. Also,
By appropriately combining the inclination angle of the projection of the locking projection and the inclination angle of the locking groove, the locking state can be adjusted freely.

Thus, the hose clamp has an excellent effect in use. But on the other hand,
The hose clamp has a problem in terms of tightening force. That is, for example, when a rubber hose is connected to a pipe of a radiator, the vehicle is constantly vibrating during traveling, and thus there is a concern that the hose may shift if the tightening force of the hose clamp is weak.

Since the hose clamp is a single leaf spring, its clamping force is weak, and if the thickness of the leaf spring is increased, the clamping force can be increased to some extent. Beyond the thickness of the hose clamp, the bending stress against the deflection that occurs when expanding the diameter of the hose clamp increases, plastic deformation also increases sharply, and the clamping effect decreases rather, and eventually only a certain amount of tightening force can be obtained. Did not.

[0015]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a belt-shaped leaf spring body overlapped with a belt-shaped leaf spring for increasing a tightening force, and externally fitted to each other. It is an object of the present invention to provide a hose clamp capable of significantly increasing the hose clamp.

[0016]

The gist of the present invention is to form an annular member whose both ends are opposed to each other, and to extend the extended piece when it is in a free state on the opposite side of the extended piece. Are provided with groove-shaped notches inserted so as to form the same peripheral surface, and between the notch and an extended piece described later, both ends are arrow-shaped band-shaped ridges along the length direction. A band-shaped leaf spring body provided with a portion, and integrally formed on one end side of the band-shaped leaf spring body along a circumferential direction thereof, and a tip thereof is directed outward along a radial direction of the band-shaped leaf spring body. The stopper was bent to form a stopper portion, and was erected outward on the both sides in the width direction toward the outside of the band-shaped leaf spring body, and a part of the erected tip was projected toward the stopper portion at a required inclination angle. An extending piece provided with a pair of locking projections, and a tip of the other end of the band-shaped leaf spring body, in a radial direction thereof. Bent to form outwardly of Tsu,
A notch part slightly wider than the width of the extension piece is provided, while a horizontal part is provided with an interval corresponding to the interval between the pair of locking projections, and is inclined at a required angle so as to become deeper toward the top. A hose clamp comprising a stopper groove and a receiving piece provided with a notch on the locking groove, wherein the hose clamp has a substantially same shape as the band-shaped leaf spring body and a lengthwise direction. The hose clamp is formed by externally fitting a band-shaped leaf spring for increasing the tightening force provided with a cutout portion along which the band-shaped ridge is fitted.

[0017]

Next, the operation of the present invention will be described. The method of putting the hose clamp in the temporarily fixed state and the method of releasing the temporarily fixed state are the same as the hose clamp devised by the present inventors. However, when the temporary fixing state is released and tightened, the tightening force of the outer band-shaped leaf spring for increasing the outer tightening force is applied in addition to the tightening force of the inner band-shaped plate spring main body. Is what you do.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a hose clamp according to the present invention in an unfolded state, FIG. 2 is an enlarged view of a portion A in FIG.
1 is an enlarged view of a portion B in FIG. 1, FIG. 4 is a front view of a hose clamp according to the present invention in an unfolded state, FIG. 5 is a front view of a free state,
6 is an enlarged view of a portion C in FIG. 5, and FIG. 7 is a right side view in a free state.

In the figure, reference numeral 28 denotes a hose clamp according to the present invention, which is entirely formed by a single band-shaped leaf spring. Reference numeral 29 denotes a belt-shaped leaf spring main body, which is formed in an annular shape so that both ends face each other. The band-shaped leaf spring body 2
A band-shaped ridge 30 whose both ends are arrow-shaped is formed along the circumferential direction of 9.

Reference numeral 31 denotes an extension piece extending from one end of the band-shaped leaf spring main body 29 to a required length along the circumferential direction thereof, and has a distal end extending along the radial direction of the band-shaped leaf spring main body 29. A stopper portion 32 is formed by bending outward.

At both sides in the width direction of the extension piece 31, the stoppers 33a, 33a, which are erected toward the outside of the band-shaped leaf spring main body 29 and are erected at the required inclination angle, are provided at the required inclination angles. A pair of locking projections 33, 33 protruding toward the portion 32 are provided.

Reference numeral 34 denotes a receiving piece formed at the other end of the leaf spring body 29 by bending outward in the radial direction of the leaf spring body 29.

The receiving piece 34 is provided with a notch 35 which is slightly wider than the width of the extending piece 31.
a has locking grooves 36, 36 at intervals corresponding to the interval between the pair of locking projections 33, 33 and inclined at a required angle so as to become deeper toward the top,
7 are provided. The inclination angle θ of the locking grooves 36 is set to 30 degrees in the present embodiment, but may be larger or smaller than 30 degrees. In this case, when the angle is set to 30 degrees or less, the lock can be easily released, and when the angle is set to 30 degrees or more, the lock becomes strong. Therefore, the locking groove 3
By appropriately combining the angle of inclination of 6 with the angle of inclination of the protruding portion 33a of the locking projection 33, the locking state can be freely adjusted.

The other end of the band-shaped leaf spring body 29 has
There is provided a groove-shaped notch 38 into which the extending piece 31 is inserted so as to form the same peripheral surface.

The above configuration is the same as the hose clamp devised earlier by the present inventors. However, a feature of the present invention is that the band-shaped protruding portion 30 which is substantially the same shape as the band-shaped plate spring main body 29 and fits in the longitudinal direction in the band-shaped plate spring main body 29 of the hose clamp 28. The point lies in that the band-shaped leaf spring 40 for increasing the tightening force provided with the notch 39 is externally fitted.

[0026]

As described above, in the present invention, the belt-shaped leaf spring body for tightening force is superimposed on the outer periphery of the belt-shaped leaf spring body and externally fitted. In addition to the tightening force, the tightening force of the outer band-shaped leaf spring for increasing the tightening force is applied, so that the tightening force is significantly increased. Therefore, the clamping effect can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a hose clamp according to the present invention in an unfolded state.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is an enlarged view of a portion B in FIG. 1;

FIG. 4 is a front view of a deployed state.

FIG. 5 is a front view of a free state.

FIG. 6 is an enlarged view of a portion C in FIG. 5;

FIG. 7 is a right side view in a free state.

FIG. 8 is a perspective view of a conventional example in a temporarily fixed state.

FIG. 9 is an explanatory diagram of the operation of releasing the temporary fixing state of the conventional example shown in FIG.

FIG. 10 is a front view of another conventional example in a temporarily fixed state.

11 is a partially enlarged perspective view of the conventional example shown in FIG.

FIG. 12 is a plan view of the hose clamp developed by the present inventors in a deployed state.

FIG. 13 is an enlarged view of a portion A in FIG.

FIG. 14 is a front view of a free state.

FIG. 15 is an enlarged view of a portion B in FIG. 14;

FIG. 16 is a front view of a temporarily fixed state.

FIG. 17 is an explanatory diagram of an operation of releasing a temporarily fixed state.

FIG. 18 is an explanatory diagram of a use state.

[Explanation of symbols]

 28 Hose clamp 29 Band-shaped leaf spring main body 30 Band-shaped protruding portion of which both ends are arrow-shaped 31 Extension piece 32 Stopper part 33, 33 A pair of locking protrusions 33a, 33a Projection portion of locking protrusion inclined 34 Receiving piece 34a Horizontal portion 35 of receiving piece 35 Notch 36, 36 Locking groove 37 Notch 38 Groove-shaped notch 40 Strip-shaped leaf spring for increasing tightening force

Claims (1)

(57) [Scope of request for utility model registration] 1. A groove-shaped notch formed in an annular shape with both ends facing each other and inserted into an opposite portion of an extension piece so that the extension piece forms the same peripheral surface when in a free state. And a band-shaped leaf spring body having an arrow-shaped band-shaped ridge at both ends along the length direction between the notch and the extension piece described below, and one end of the band-shaped leaf spring body. Side is formed integrally along its circumferential direction, and the tip is bent outwardly along the radial direction of the band-shaped leaf spring body to form a stopper portion and the band-shaped portions are formed on both sides in the width direction. An extension piece provided with a pair of locking projections which are raised toward the outside of the leaf spring body and a part of the raised tip is projected toward the stopper portion at a required inclination angle; and At the other end of the spring body, it is formed by bending outwardly along its radial direction,
A notch part slightly wider than the width of the extension piece is provided, while a horizontal part is provided with an interval corresponding to the interval between the pair of locking projections, and is inclined at a required angle so as to become deeper toward the top. A hose clamp comprising a stopper groove and a receiving piece provided with a notch on the locking groove, wherein the hose clamp has a substantially same shape as the band-shaped leaf spring body and a lengthwise direction. A hose clamp formed by externally fitting a band-shaped leaf spring for increasing a tightening force provided with a cutout portion along which the band-shaped protrusion is fitted.