JPH0512552Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an improvement in a hose clamp used for tightening and fixing rubber hoses to the ends of connecting pipes.

"Prior Art" As a conventional hose clamp of this type, there is one shown in, for example, Japanese Utility Model Application Publication No. 128090/1983.

As shown in FIG. 3, the conventional hose clamp is entirely molded from a single elastic flat plate, and one end of the annular clamp body 1 is bent outward to form one grip portion 2A. At the same time, an opening 3 is formed in one grip portion 2A to allow passage of the other grip portion, which will be described later, and a guide groove 4 is continuously formed from the opening 3 to the clamp body 1.

Further, the other end side of the clamp body 1 is provided with the above-mentioned opening 3.
The other end is bent outward in the same way to form the other grip part 2B, and at the tip of the other grip part 2B, the one The structure is such that a locking hook 6 that is removably engaged with the tip edge 5 of the grip portion 2A is integrally provided.

Therefore, in the conventional hose clamp, the pair of grip parts 2A and 2B are forcibly brought close together, and the locking hook 6 of the other grip part 2B is locked to the tip edge 5 of one grip part 2A. Then, the clamp body 1 can be held in an enlarged state, even if only temporarily.

Therefore, in actual use, although not specifically shown in the drawings, an operator uses a clamping tool such as pliers to bring one grip part 2A and the other grip part 2B close to each other, and to separate the grip part 2A. The locking hook 6 is engaged with the tip edge 5, and the clamp body 1 is
After holding the clamp body 1 in an enlarged diameter state, the clamp body 1 is fitted onto the rubber hose to be tightened, and then the locking hook 6 is released from the distal end edge 5 of the grip portion 2A, thereby tightening the clamp body 1 itself. With the elastic force of , the other narrow grip part 2B moves inside the guide groove 4, and this time, the diameter of the clamp body 1 is immediately allowed to decrease, so that the rubber hose is automatically tightened. Become.

``Problem to be solved by the invention'' However, the conventional hose clamp does not attach the locking hook 6 provided on the other side of the grip part 2B to the tip edge 5 by using the tip edge 5 of one grip part 2A. Adopting the locking structure has the advantage of simplifying the lock structure that expands the diameter of the clamp body 1, but on the other hand, the tip edge 5 of the lock hook 6
In order to release the lock from the clamp, the simplification of the lock structure is disadvantageous, and the operator must force the lock hook 6 upwards with a tool such as a screwdriver while holding down the clamp body 1 with one hand. Therefore, there was a problem in that the work of reducing the diameter of the clamp body 1 was difficult.

Moreover, the direction in which the tool such as a screwdriver is used is from the lateral direction of the clamp body 1 and from the locking hook 6.
Since the locking hook 6 can only be raised upward from below, the workability of this tool is also considered problematic.

Furthermore, when the locking hook 6 is engaged with the tip edge 5 of one of the grip sections 2A, the engagement section protrudes most outwardly, so it is most susceptible to the influence of external forces and is susceptible to unexpected external forces. In such cases, it has often been observed that the locking hook 6 is inadvertently released and the diameter of the clamp body 1 is erroneously reduced.

``Means for Solving the Problems'' Therefore, the present invention was developed in order to effectively solve the conventional problems. Assuming that the hose clamp is configured such that the clamp body can be held in an enlarged diameter state by removably locking both grip parts, one end of the clamp body is bent outward and one end of the clamp body is bent outward. A grip portion is formed, an opening is formed in one of the grip portions, a guide groove is continuously formed from the opening to the clamp body, and the other end of the clamp body is connected to the opening and the guide groove. The other end is bent outward to form the other grip part, and a pair of locking pieces having locking claws are provided on both side edges of the other grip part. , and the lock claws of each of the locking pieces are locked to the side edge of an opening formed in one of the grip portions.

"Operation" Accordingly, even in the present invention, when one grip part and the other grip part are brought close to each other using a clamping tool such as pliers, the pair of grip parts provided on both side edges of the other grip part are removed. Both of the locking pieces bend inward and fit into the opening formed in one of the grip parts, and lock their respective locking claws to the corresponding side edges of the opening. As a result, the clamp body is reliably held in the expanded diameter state.

When releasing the locking claws in order to reduce the diameter of the clamp body and tighten and fix the hose, the tips of the pair of locking pieces are held by a holding tool such as pliers, By simply bending both locking pieces slightly inward, the locking of each lock claw to the opening side edge can be immediately released. After that, when the pair of locking pieces are released, the other grip part will be released. It becomes possible for the clamp body to automatically reduce its diameter by moving through the guide groove continuous from the opening.

Therefore, this ensures that the hose is securely fastened to the end of the connecting pipe.

``Example'' Hereinafter, the present invention will be described in detail based on an example illustrating the present invention.The hose clamp according to the present invention also basically includes a pair of grip parts formed at both ends of the clamp body. The premise is that the annular clamp body is held in an enlarged diameter state by bringing the two grip parts close to each other and removably locking them together, and the feature is as follows: The point is that we have adopted

That is, in this embodiment, as shown in FIGS. 1 and 2, one end of the clamp body 11 is bent outward, and one grip part 12 is attached to this one end.
A, a relatively large opening 13 is formed in the one grip part 12A, and the opening 13 is
A guide groove 14 is continuously drilled from the clamp body 11 to the clamp body 11.

The other end of the clamp body 11 is set to have a narrow width that allows it to move through the opening 13 and the guide groove 14, and the other end of the narrow width is bent outward to attach the other grip portion 12B. At the same time, a pair of elastic locking pieces 15, 15 having locking claws 16 are provided on both side edges of the other grip portion 12B, and the locking claws 16 of each of the locking pieces 15 are attached to the one grip portion 12A. Opposite side edge 13a of opening 13 bored in
The structure is such that it is locked to the

In this embodiment, the lock pawl 16 is formed by cutting out a part of the elastic locking piece 15 and expanding outward in a tapered state, but the invention is not limited to this. Instead, it is also possible to fix it to the elastic locking piece 15 later by welding or the like.

Therefore, when tightening a rubber hose using the hose clamp of this embodiment, if a clamping tool such as pliers is used to forcibly bring one grip part 12A and the other grip part 12B close to each other, As shown in FIGS. 1A and 1B, a pair of elastic locking pieces 15, 15 provided on both side edges of the other grip part 12B are inserted into the opening 13 formed in one grip part 12A. Then, the respective lock claws 16 are respectively locked to the corresponding side edges 13a of the opening 13, so that the clamp body 11 is first
is held in an expanded state.

Then, after fitting the clamp body 11 in the enlarged diameter state onto a rubber hose (not shown) to be tightened, the tips of the pair of elastic locking pieces 15, 15 are clamped with a clamping tool such as pliers. Each locking piece 1
5 can be immediately released from locking the side edge 13a of the opening 13.
All that is left to do is to release the pair of locking pieces 15, 15 from being held by the tool, and as shown in FIG.
4 and immediately allow the diameter of the clamp body 11 to be reduced, thereby automatically tightening the rubber hose.

Moreover, in this embodiment, the clamp body 1
When releasing the locking claw 16 in order to reduce the diameter of the hose 1 and tighten and fix the hose, simply hold the tips of the pair of locking pieces 15, 15 with a gripping tool such as pliers. It goes without saying that this alone makes the work extremely easy, but the direction in which the clamping tool is used is also particularly important.
It goes without saying that the tool can be used from the side of the clamp body 11, but also from the top of the clamp body 11, so it is expected that workability will be greatly improved by the direction of use of the clamping tool. becomes.

Moreover, in this embodiment, a pair of locking pieces 1
5 into an opening 13 formed in one grip part 12A, and each lock claw 16 is engaged with a corresponding side edge 13a of the opening 13,
It is less susceptible to external forces than before, and even if external forces are applied, both locking claws 16 will not bend as long as the pair of locking pieces 15 do not bend inward synchronously.
Since the lock is never released, there is almost no fear that the clamp body 11 will be erroneously reduced in diameter.

"Effects of the Invention" As described above, according to the hose clamp of the present invention, when releasing the locking pawls to reduce the diameter of the clamp body, the ends of the pair of locking pieces are simply held with pliers, etc. All you have to do is clamp it with the clamping tool, so this alone not only makes the work much easier compared to the conventional clamping method, but also the fact that the clamping tool can be used from the side of the clamp body. Of course, it can also be used from above the clamp body, so
This direction in the use of the clamping tool is also expected to greatly improve work efficiency.

Moreover, in the present invention, a pair of locking pieces are inserted into an opening formed in one of the grip parts, and each locking claw is locked to the side edge of the opening. , compared to the past, the locking part is less susceptible to external force, and even if it receives unexpected external force,
Unless the pair of locking pieces are bent inward in synchronization, both locking claws will not be unlocked, so there is almost no chance of the clamp body accidentally contracting in diameter, unlike in the past. Summer.

[Brief explanation of the drawing]

FIG. 1A is a perspective view showing a hose clamp according to an embodiment of the present invention with the clamp body expanded in diameter;
FIG. 2 is a perspective view showing the clamp main body in a reduced diameter state, and FIG. 3 is a perspective view showing a conventional hose clamp in a state in which the clamp main body is reduced in diameter. 11... Clamp body, 12A... One grip part, 12B... Other grip part, 13...
Opening, 14... Guide groove, 15... Locking piece, 16
...Lock claw.

Claims (1)

[Scope of utility model registration request] A hose clamp configured to hold the clamp body in an enlarged diameter state by bringing a pair of grip parts formed at both ends of the clamp body close to each other and removably locking the grip parts to each other. One end of the main body is bent outward to form one grip part, an opening is formed in the one grip part, and a guide groove is continuously formed from the opening to the clamp body, and The other end of the clamp body is set to a width that allows it to move through the opening and the guide groove, and the other end is bent outward to form the other grip part. A pair of locking pieces having locking claws on both side edges are provided, and the locking claws of each of the locking pieces are configured to be locked to a side edge of an opening formed in one of the grip parts. Hose clamp.