JPH081539A - Hose band tightening device - Google Patents

Abstract

PURPOSE:To provide a tightening device with which a hose band can be tightened with small operation force. CONSTITUTION:Tips of a pair of handles 1a, 1b are connected to each other by a shaft 2 be freely opened/closed, and end parts of a pair of side plates of a U-shaped support frame 3 are connected to both end parts of the shaft 2. Crossing parts of a pair of levers 5a, 5b inserted into the support frame 3 are connected to each other by a pin 6, and the pin 6 is inserted into guide holes 7 formed in the side plates to slide freely. Rear ends of the levers 5a, 5b are connected to the tips of the handles 1a, 1b, and push clews 9a, 9b are provided at tips of the levers 5a, 5b. The push claws 9a, 9b are opened/closed by opening/closing of the handles 1a, 1b, a side wall 14a of a U-shaped bent part 14 provided on a hose band 11 is deformed inward by the push claws 9a, 9b to tighten the hose band 11, grip force on the handles 1a, 1b is increased at the rear ends of the levers 5a, 5b, and it is increased at tips of the push pawls 9a, 9b, thereby tightening force to the hose band 11 can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose band fastener.

[0002]

2. Description of the Related Art A hose band shown in FIG. 4 is known. The hose band 11 is formed by bending a metal strip plate into a circular shape to form a ring portion 12, and fixing an outer end 13 of the ring portion 12 to the ring portion 12 by means of welding. The outer end portion 13 is provided with a U-shaped bent portion 14 that rises toward the outer diameter side, and both side walls of the bent portion 14 are bent inward to reduce the diameter of the ring portion 12.

As a fastening tool for the hose band, the one described in US Pat. No. 3,216,291 has been conventionally known. In this fastener, a push claw is provided at each tip of a pair of handles that can be opened and closed, and the bent portion 14 of the hose band is positioned between the pair of open claws to grip the pair of handles. By operation, the pair of push claws are moved inward to deform the pair of side walls 14a of the bent portion 14 inward.

Further, a U-shaped push frame is provided between the pair of push claws, and a pin serving as an opening / closing center of the handle is inserted into a guide hole formed in a side plate of the push frame to close the pair of handles. When the hose band is fastened, the pair of push claws move the push frame outwardly in an interlocking manner and the pair of push claws deform the side wall 14a of the bent portion 14 inward. End wall 14 across
b toward the inner diameter of the ring portion 12 so that the end wall 14b
Is being molded.

[0005]

By the way, in the above-mentioned fastener, it is necessary to increase the lever ratio of the length from the opening / closing center of the handle to the force point of the handle and the length from the opening / closing center to the point of action of the push claw. Although the hose band can be tightened with a small force, in this case, the total length of the tightening tool becomes long, and the opening / closing angle of the pair of handles becomes large, which causes a problem in operability. On the other hand, if the lever ratio is reduced, a large force is required to tighten the hose band.

Further, since the push frame is only supported by the pin serving as the opening / closing center of the handle, the posture is not constant, and the end wall 14b of the bent portion 14 cannot be properly molded. .

An object of the present invention is to provide a fastening tool which can fasten a hose band with a small force and can favorably shape an end wall of a bent portion.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a pair of handles are openably and closably connected at their distal ends, and a pair of U-shaped support frames are attached to the open / close center shafts of the handles. The end portions of the side plates are connected, the intersections of a pair of levers inserted inside the support frame are openably and closably connected by pins, and both end portions of the pins are guide holes formed in the side plates of the support frame. It is slidably inserted into the lever, the rear end of each lever is rotatably connected to the tip of each handle, and a push claw is provided at the tip of each lever.

[0009]

With the above construction, the force for gripping the pair of handles is increased at the rear end position of the lever, and further,
The hose band can be tightened with a small force because it is increased at the position of the push claw.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the tip ends of the pair of handles 1a and 1b are connected via a shaft 2 so as to be openable and closable.

The ends of the pair of side plates 4 of the U-shaped support frame 3 face the outer ends of the pair of handles 1a and 1b, and the ends of the side plates 4 serve as the opening / closing center of the handles 1a and 1b. It is supported by the shaft 2.

Inside the support frame 3, a pair of levers 5a,
5b is inserted. The intersection of the pair of levers 5a, 5b is openably and closably connected by a pin 6, and both ends of the pin 6 are slidable in a guide hole 7 formed of an elongated hole formed in each side plate 4 of the support frame 3. Inserted in.

The rear end portions of the pair of levers 5a and 5b are connected to the front end portions of the handles 1a and 1b through connecting pins 8. Further, the tip ends of the pair of levers 5a and 5b are bent in opposite directions to form push claws 9a and 9b, and the width dimension of the push claws 9a and 9b is the width dimension of the hose band 11 shown in FIG. It is getting bigger.

Now, when the pair of handles 1a, 1b is opened, the rear end portions of the pair of levers 5a, 5b move in the direction of separating, so that the pair of push claws 9a, 9b are opened.

When tightening the hose band 11 shown in FIG. 4, with the pair of push claws 9a and 9b opened, the hose band 1 is placed between the pair of push claws 9a and 9b.
One bent portion 14 is positioned, and in that state, the pair of handles 1a and 1b are gripped, and the pair of push claws 9a and 9b are moved in the closing direction to deform the pair of side walls 14a of the bent portion 14 inward.

When the pair of push claws 9a, 9b move in the closing direction, the handles 1a, 1b and the lever 5 are moved.
Since the pin 6 connecting the a and 5b moves in an arc around the shaft 2 which is the opening / closing center of the handles 1a and 1b,
The pin 6, which is the opening / closing center of the pair of levers 5 a and 5 b, is pulled down and moves along the guide hole 7.

Therefore, the pair of push claws 9a and 9b move toward the end surface 10 of the support frame 3 while moving in the closing direction, and as shown in FIG.
4b contacts the end surface 10 of the support frame 3, and the end surface 10 forms the end wall 14b.

At this time, since the support frame 3 is supported by the shaft 2 and the pin 6, it is always held in a fixed posture, and the end surface 10 of the support frame 3 causes the end wall 14b of the bent portion 14b.
Is shaped like a flat plate.

When tightening the hose band 11 as described above, the force for gripping the handles 1a, 1b is increased at the rear ends of the levers 5a, 5b by this principle and further increased at the front ends of the claws 9a, 9b by pushing. Therefore, the hose band 11 can be tightened with a very small force.

[0021]

As described above, in the tightening tool according to the present invention, the front end portions of the pair of handles to which the rear end portions of the pair of openable and closable levers having the push claws at the front end portions are openably and closably connected. Therefore, the tightening force of the hose band can be reduced as compared with the tightening tool in which the push claws are directly provided on the distal ends of the pair of handles that are openably and closably connected.

Further, the ends of the pair of side plates of the U-shaped support frame are connected to the opening / closing center of the pair of handles, and the pin serving as the opening / closing center of the pair of levers is inserted into the guide hole formed in each side plate. The posture of the support frame can be held constant, and the end wall of the bent portion can be formed extremely well on the end surface of the support frame.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a fastener according to the present invention.

FIG. 2 is a side view of the above.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a front view showing a usage state of the above fastener.

FIG. 5 is a front view showing a state in which the hose band is tightened using the above-described tightening tool.

[Explanation of symbols]

 1a, 1b Handle 2 Shaft 3 Support frame 4 Side plate 5a, 5b Lever 6 Pin 7 Guide hole 8 Connecting pin 9a, 9b Push claw

Claims (1)

[Claims] 1. A pair of handles are openably and closably connected at their tips, and an end of a pair of side plates of a U-shaped support frame is connected to an opening / closing center axis of the handles and is inserted into the inside of the support frame. The intersection of a pair of levers is openably and closably connected with a pin, both ends of the pin are slidably inserted into the guide holes formed in the side plates of the support frame, and the rear end of each lever is the tip of each handle. A hose band tightening tool that is rotatably connected to each section and has push claws at the tip of each lever.