JPH0728470Y2 - Hose clamp - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention is a hose clamp for fastening a hose made of rubber or synthetic resin to a metal pipe or the like, and in particular, the hose clamp is kept in an expanded state in advance and the diameter is reduced by one-touch operation after inserting the hose. One-touch type hose clamp that can be improved.

2. Description of the Related Art As a conventional hose clamp, for example, as shown in FIG. 10, a substantially U-shaped bridge portion 31 is bent and formed at one end of a strip-shaped metal plate having a spring property, and the bridge is formed at the other end. There is one in which an extension 33 passing through the opening 32 of the portion 31 is formed by bending, and a claw piece 34 is provided at the tip of the extension 33 (Japanese Utility Model Publication No. 60-128090, etc.). This hose clamp allows the hose 34 to engage with the upper end of the bridge portion 31 and
It is designed to be kept in an expanded state that is larger than the 35 diameter, and after inserting it into the hose 35, use a tool to
The diameter of the hose 35 can be automatically reduced by releasing the engagement of the hose 35 and the hose 35 can be fastened to a pipe (not shown).

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the hose clamp as described above, the locking force obtained by the claw piece 34 is weak, and the engagement may unnecessarily be disengaged before the attachment to the hose 35. In addition, since a worker's finger may be hit during detachment work, a tool must be used without fail, and workability is poor.

Therefore, the present applicant has previously proposed a one-touch type hose clamp capable of disengaging the engagement in the expanded diameter state by axially displacing both ends of the annularly curved metal plate. (JP-A-3-24395).

The present application further improves the previously proposed one so that the detaching work can be performed more easily with fingers, and the interference between the bridge portion and other components and the damage to other components are avoided as much as possible. It is the one.

Means for Solving the Problem The present invention is directed to bending a bridge portion at one end of a strip-shaped metal plate curved so as to have a diameter equal to or smaller than a hose diameter in a free state, and inserting the bridge portion into an opening of the bridge portion. An operation end portion that rises in a substantially radial direction is formed at the end, and both end portions of the strip-shaped metal plate are engaged with each other in a diameter expanded state equal to or larger than the hose diameter and can be separated by relative movement in the axial direction. In the hose clamp provided with a stopper, the operating end passes through the opening in the expanded state, and both ends of the strip-shaped metal plate are configured to intersect with each other, and the bridge part It is characterized in that pressing operation pieces facing the operation force direction at the time of detachment are respectively bent and formed on the side edges of the corner portion and the operation end portion.

Action In the above configuration, the expanded state of the hose diameter or more is maintained by the engagement of the locking portion. In this engaged state, that is, the expanded diameter state, the operation end portion extends in the circumferential direction in advance through the opening of the bridge portion, and both ends of the strip-shaped metal plate intersect with each other. This engagement is disengaged by moving the bridge and the operating end protruding from the opening of the bridge relative to each other in the axial direction, whereby the hose clamp is reduced in diameter.

Here, since the pressing operation piece facing the operation force direction is bent and formed on the bridge portion and the operation end portion, the finger can be widely pressed and contacted, the operation can be facilitated, and the finger can be hurt. Absent.

Further, by bending the corner portion of the bridge portion, the outer dimension thereof is reduced.

Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2 show a first embodiment of the hose clamp according to the present invention. This hose clamp is formed by punching a strip-shaped metal plate having a spring property into a predetermined shape and then curving it into an annular shape.
An elongated slit-shaped opening 2 is provided at one end of the bridge portion 3 by bending its tip in a substantially radial direction.
Are formed. Further, the other end of the annular portion 1 is formed to have a narrow width so that it can be inserted into the opening 2, and an operation end 4 which is erected in a substantially radial direction is formed at a tip thereof. It should be noted that this hose clamp is designed so as to be wound under a predetermined hose diameter or less in a free state.

The bridge portion 3 is an opening that is an end of the opening 2.
2a, and has a notch 5 extending in the radial direction on one side thereof. In other words, the opening 2a and the notch 5
Retaining wall 6 that is one of the retaining parts
Are formed in a substantially L shape. Further, one corner portion of the bridge portion 3, more specifically, a corner portion on the side of the cutout portion 5 is bent so as to be substantially orthogonal to the hose axis direction to form a pressing operation piece 7 having a substantially triangular shape. That is, the corner portion of the bridge portion 3 is punched out at a substantially right angle as a base material, and has a shape obtained by bending this into a substantially triangular shape at an angle of approximately 90 °. The other corner of the bridge portion 3 is cut out in a substantially triangular shape. Therefore, the outer shape of the entire bridge portion 3 is substantially trapezoidal when viewed from the circumferential direction.

As shown in FIG. 3, without cutting off the other corner,
It may be bent on the side opposite to the pressing operation piece 7.

Further, on the operating end 4 side of the annular portion 1, a locking claw 8 that constitutes a locking portion is provided at a position slightly apart from the operating end 4. The locking claw 8 is bent so as to project from the side edge of the annular portion 1 in a substantially radial direction, and the tip thereof slightly projects toward the operation end portion 4 side. Then, on one side edge of the operation end portion 4 so as to be substantially orthogonal to the hose axial direction,
A pressing operation piece 9 having a substantially triangular shape is bent and formed. The pressing operation piece 9 has a shape in which one side of the operation end 4 having a strip shape is bent into a substantially triangular shape.

In the above configuration, the locking claw 8 engages with the locking wall 6 of the bridge portion 3 to keep the expanded diameter state of the hose clamp. At this time, the locking claw 8 and the locking wall 6 are strongly pressed against each other due to the spring property of the base material, and a reliable engagement state is obtained. The locking wall 6 for receiving the tip of the locking claw 8
Part of this is locally recessed (see FIG. 2), and accidental disengagement due to impact or the like can be prevented more reliably. Further, in this expanded state, as is apparent from FIG. 1, the operating end portion 4 has already passed through the opening 2a of the bridge portion 3 and the both ends of the annular portion 1 intersect with each other. Has become. That is, the operating end 4 is in a state of protruding in the circumferential direction from the opening 2a.

After the insertion into the hose, when the operator grips the pressing operation pieces 7 and 9 with his fingers to move the pressing operation pieces 7 and 9 relative to each other in the axial direction of the hose, the locking claw 8 comes off from the notch portion 5 of the bridge portion 3. That is, the engagement between the engagement claw 8 and the engagement wall 6 is released, and the hose clamp is reduced in diameter by its own spring property. Therefore, the hose can be fastened by one-touch operation.

Here, since the pressing operation pieces 7 and 9 are formed so as to face in the direction of the operation force required at the time of detachment, the fingers are in wide surface contact, the operation is easy, and the fingers may be damaged. There is no. Moreover, when the locking claw 8 is detached from the cutout portion 5, the operating end portion 4 is momentarily moved to the bridge portion 3 during the diameter reduction operation.
The operation end 4 has already passed through the opening 2a of the bridge 3 and extends in that state, so that the fingers are caught between the bridge 3 and the operation end 4. There is no danger of being hurt. Further, since the bridge portion 3 has a trapezoidal shape, the bridge portion 3 has a correspondingly compact shape, avoiding interference with other parts, which is advantageous in terms of space efficiency. Moreover, since the bridge portion 3 does not have a sharp corner, there is no fear of damaging other components.

Next, FIGS. 4 and 5 show a second embodiment of the present invention.

In the second embodiment, the opening 2a of the bridge portion 3 has a relatively large rectangular opening. Then, on the bridge portion 3 side of the annular portion 1, a locking claw 11 is formed at a position slightly apart from the bridge portion 3. This locking claw
The reference numeral 11 indicates a shape in which the wall portion of the operation end portion 4 is formed by once rising in the radial direction and then being bent inward of the opening 2.
It is adapted to directly engage with 4a. Incidentally, the locking claw 11
A part of the wall 4a with which the tip abuts is locally recessed (see FIG. 5).

A pressing operation piece 7 similar to that of the first embodiment described above is formed at one corner of the bridge portion 3, and the other corner is bent in the opposite direction to the pressing operation piece 7. A substantially rectangular pressing operation piece 12 is bent and formed on the side edge of the operation end portion 4.

Therefore, if both pressing operation pieces 7 and 12 are pinched and shifted in the axial direction, they can be easily separated as in the first embodiment described above.

As shown by an imaginary line, the pressing operation piece 7 may be bent toward the opposite side.

Further, as shown in FIG. 6, the corner portion of the bridge portion 3 located on the side opposite to the pressing operation piece 7 may be cut obliquely or into an R shape.

Then, as shown in FIG. 6, if a bending piece 13 having the same shape as the pressing side edge piece 12 is provided on the other side edge of the operation end portion 4, the diameter of the hose clamp can be expanded using a tool. At the time of work, the operation end 4 can be pressed uniformly to the left and right, and the diameter expansion work becomes easy.

Next, FIG. 7 shows a third embodiment of the present invention. In the third embodiment, basically, similar to the second embodiment described above, the locking claw 11 is provided on the bridge portion 3 side, and the locking claw 11 is engaged with the wall portion 4a of the operation end portion 4. It is composed. Further, the side edge 11a on the back side of the locking claw 11 has a gentle R shape, and the pressing operation piece 12 is provided with an extension 14 so as to come into contact with the side edge 11a. That is, a gap slightly larger than the width of the locking claw 11 is formed between the side edge 14a of the extension 14 and the wall 4a.

In the third embodiment, it is needless to say that the pressing operation pieces 7 and 12 can be pinched and disengaged from each other in the same manner as in the above-described respective embodiments, but in addition to this, the operation end portion 4 is Engagement / disengagement is also possible by pressing the bridge portion 3 in the circumferential direction. In other words, the operating end 4 is the bridge 3
When pressed toward, the side edge 11a of the locking claw 11 that comes into contact with the side edge 14a of the extension portion 14 acts as a kind of cam and guides the entire operation end portion 4 in the axial direction. Engagement is disengaged in the same way as when 7, 12 are moved relative to each other in the axial direction. Therefore, the diameter of the hose clamp can be reduced by an operation in either of two directions depending on the usage mode.

Further, in the fourth embodiment shown in FIG. 8, the pressing operation piece 15 on the operation end 4 side is formed at a position apart from the wall portion 4a, and the detaching operation from two directions is performed similarly to the third embodiment described above. Is made possible.

Further, FIG. 9 shows a fifth embodiment of the present invention.

In the fifth embodiment, similarly to the first embodiment, a locking claw 8 is provided on the side of the operation end portion 4 and is adapted to engage with the locking wall 6 of the bridge portion 3. The operation end 4
Is inclined so that an angle formed with the end of the annular portion 1 is an obtuse angle, and a rectangular pressing operation piece 16 is bent and formed on a side edge thereof. A notch 17 is formed in the bridge 3 so as to face the pressing operation piece 16 in the circumferential direction, and a side edge 17a of the notch 17 is inclined inward.

Therefore, when the bridge portion 3 and the operating end portion 4 are pressed in the circumferential direction, the side edge 17a of the cutout portion 17 and the side edge 16a of the pressing operation piece 16 are pressed.
And the side edge 17a of the cutout portion 17 perform a kind of cam action to guide the operating end portion 4 in the axial direction. Therefore, it is possible to perform the detaching operation from the two directions as in the third and fourth embodiments.

Effect of the Invention As is apparent from the above description, in the hose clamp according to the present invention, the pressing operation pieces provided on the bridge portion and the operation end portion are axially pressed to disengage each other. Therefore, the detachment work can be easily performed by the operator's fingers, the work efficiency is improved, and the fingers are not injured. In addition, since the operating end passes through the opening of the bridge portion in the expanded state and both ends of the strip-shaped metal plate intersect each other, the opening of the bridge portion is previously opened during the diameter reducing operation. The operating end that is passing becomes a shape that extends as it is,
It is extremely safe. In other words, the operation end portion does not instantaneously enter the opening portion during the diameter reduction operation, and there is no risk that the fingers will be caught in the opening portion and damaged. Also, by bending the corners of the bridge, the external dimensions are reduced,
Interference with other parts is avoided and space efficiency is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a hose clamp according to the present invention, FIG. 2 is a front view of a main portion thereof, and FIG. 3 is a perspective view showing an embodiment in which a part of a bridge portion is changed, FIG. 4 is a perspective view showing a second embodiment of the present invention, and FIG. 5 is a perspective view of FIG.
FIG. 6 is a sectional view taken along line VV, FIG. 6 is a perspective view showing an embodiment obtained by partially modifying the second embodiment, and FIG. 7 is a third view of the present invention.
8 is a perspective view showing a fourth embodiment of the present invention, FIG. 9 is a perspective view showing a fifth embodiment of the present invention, and FIG. 10 is a perspective view showing a conventional hose clamp. It is a figure. 1 ... Annular part, 3 ... Bridge part, 4 ... Operation end part, 6
...... Locking wall, 7 ...... Pressing operation piece, 8 ...... Locking claw, 9 ......
Depressing operation piece, 11 …… Locking claw, 12 …… Pressing operation piece, 15 ……
Pushing operation piece, 16 …… Pressing operation piece.

Claims (1)

[Scope of utility model registration request] 1. A bridge portion is bent at one end of a strip-shaped metal plate curved so as to have a diameter not larger than a hose diameter in a free state, and the other end of the bridge portion is inserted through an opening of the bridge portion in a substantially radial direction. And a locking portion which is engaged with each other in the expanded state of the hose diameter or more and can be disengaged by relative movement in the axial direction at both ends of the strip-shaped metal plate. In the hose clamp, the operation end portion passes through the opening in the expanded state, and both ends of the strip-shaped metal plate are configured to intersect each other, and the corner portion of the bridge portion and the operation end are configured. A hose clamp, characterized in that pressing operation pieces facing the operating force direction at the time of detachment are respectively bent and formed on the side edges of the portion.