JP2005265031A - Hose clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a fault that an outer diameter of rubber or plastic hose gets small due to deterioration of repulsion elasticity or the like and that fastening amount of a hose clamp reduces and that additional fastening is required at a time of regular inspection of the hose clamp. <P>SOLUTION: The hose clamp consists of a ring having open both ends formed by bending a strip, a fork part attached to open both ends of the ring and capable of being inserted in a nesting style, engagement parts formed on opposing inner surfaces of the two fork parts, and a suppressing means always suppressing the two fork parts in a direction approaching each other. The ring is separated into two ring elements in a width direction by a slit extending in a circumference direction and a narrow rib extending in an circumference direction is formed on an inner circumference surface of each ring element. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hose clamp, and more particularly to a hose clamp in which a hose tightening force becomes constant even when the outer diameter of the hose changes.

For example, Patent Document 1 discloses a hose clamp in which both ends are overlapped with each other and a predetermined tightening force is applied to the hose by adjusting the overlapped length.
Japanese Patent Laying-Open No. 2003-28366 (FIG. 1)

  Further, as shown in FIG. 7, a U-shape that has an open end, for example, can be inserted into each of the open ends 2 and 3 of the ring 1 formed by curving a strip having a width of 7 mm and a thickness of 2 mm. A hose clamp is also known in which a ring-shaped or bifurcated portion 4, 5 is attached and a sawtooth-like serrated portion 6 is formed on the inner surfaces of the two bifurcated portions 4, 5 facing each other.

  In such a conventional hose clamp, if the both ends bifurcated portions 4 and 5 of the ring 1 placed on a hose (not shown) are inserted into each other as shown in FIG. It is strongly tightened, and in this state, the jagged portions 6 are meshed with each other and do not loosen, so that the tightening force can always be maintained.

  However, rubber and plastic hoses have a smaller outer diameter due to deterioration of rebound resilience over time and a decrease in temperature, etc., and the tightening force of the hose clamp is reduced, causing water leakage from the mouth of the hose. there were.

  For this reason, it is necessary to retighten the hose clamp at the same time as the regular inspection work, which is troublesome, and the work is difficult when the hose fixing place is narrow or hidden.

  Further, when the force of moving the bifurcated portions 4 and 5 engaged with each other in the direction perpendicular to the circumferential direction, that is, in the width direction is applied, the engagement of the serrated portion 6 is easily disengaged. There were drawbacks.

  The present invention eliminates the above-mentioned drawbacks.

  The hose clamp of the present invention includes a ring having open ends formed by bending a belt-like body, a bifurcated portion that can be inserted into each other in a nested manner, and is attached to both ends of the ring. It is characterized by comprising engaging portions formed on inner surfaces of two bifurcated portions opposed to each other, and restraining means for constantly restraining the two bifurcated portions in a direction approaching each other.

  Further, the suppression means of the hose clamp of the present invention includes a lever pivotally supported on one of the two bifurcated portions, a latching portion formed on the lever, the other of the bifurcated portions, and the above It consists of a spring that connects the latching sections.

  The ring of the hose clamp of the present invention is separated in the width direction into two ring elements by a slit extending in the circumferential direction, and a narrow rib extending in the circumferential direction on the inner peripheral surface of each ring element. Is formed.

  According to the hose clamp of the present invention, when the outer diameter of the hose becomes smaller due to deterioration or the like and the tightening force of the hose clamp is reduced, the hose clamp is automatically tightened, and the tightening work is not required for the hose clamp inspection work. Further, in the hose clamp of the present invention, even if a force in the width direction is applied to the two bifurcated portions, the hose clamp does not come off.

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

  In the present invention, as shown in FIGS. 1 and 2, a ring having an open end, for example, a width of 20 mm and a thickness of 2 mm, is used as the ring 1. The base 8a of the lever 8 is pivotally supported, and an L-shaped hooking portion 8b is projected from an intermediate portion of the lever 8, and a free end 8c of the lever 8 is formed on the base end surface of the bifurcated portion 4. And bent at a substantially right angle so that it can be inserted into the groove 4a. Further, the other end 9b of the connecting rod 9 having an opening 9a through which the hook portion 8b can be inserted is connected to the base of the other bifurcated portion 5 via a spring 10.

  Since the hose clamp of the present invention is configured as described above, one end of the connecting rod 9 is held in a state where the lever 8 is rotated clockwise as shown in FIG. The lever 8 is latched to the latching portion 8b of the lever 8 through the opening 9a, and then the lever 8 is rotated counterclockwise in FIG. 1, and the free end 8c of the lever 8 is rotated as shown in FIGS. Is inserted into a groove 4a formed at the base of the one bifurcated portion 4. In this state, the spring 10 is pulled to constantly reduce the diameter of the ring 1.

  Therefore, if the hose ring 1 is wound around the hose, the ring 1 can be further tightened by the action of the spring 10 even if the hose becomes smaller in outer diameter due to deterioration of rebound resilience or temperature decrease over time, Inspection and retightening of the hose clamp can be omitted.

  In the second embodiment of the present invention, as shown in FIGS. 5 and 6, a slit 11 extending in the circumferential direction is provided at the center of the ring 1, and the ring element 1a separated in the width direction by the slit 11 is provided. , 1b, a narrow rib 12 extending in the circumferential direction is formed.

  According to this embodiment, not only is the width of the ring 1 as large as 20 mm, for example, but the hose is clamped by the two ring elements 1a and 1b separated in the width direction, so that the force in the width direction of the ring 1 is a bifurcated portion. Even if they are added to 4 and 5 relative to each other, they will not be disengaged from each other. Further, since the hose is tightened by the narrow rib 12, the surface pressure on the hose can be increased.

It is a side view of the hose clamp of this invention. It is a top view of the hose clamp shown in FIG. It is a side view for operation | movement description of the hose clamp shown in FIG. It is a top view of the hose clamp shown in FIG. It is a perspective view of the ring in the other Example of this invention. It is a disassembled perspective view of the hose clamp using the ring shown in FIG. It is a perspective view of the conventional hose clamp.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hose ring 1a Ring element 1b Ring element 2 Both ends 3 Both ends 4 Bifurcated part 4a Groove 5 Bifurcated part 6 Grinder part 7 Pin 8 Lever 8a Base part 8b Hook part 8c Free end 9 Connecting rod 9a Opening 9b Other end 10 Spring 11 Slit 12 Rib

Claims (3)

  A ring having open ends formed by bending a belt-like body, a bifurcated portion that can be inserted in a mutually nested manner attached to the open ends of the ring, and the two bifurcated portions facing each other A hose clamp comprising: an engaging portion formed on the inner surface; and restraining means for constantly restraining the two bifurcated portions toward each other.   A lever pivotally supported on one of the two bifurcated portions, a latching portion formed on the lever, and a spring connecting the other bifurcated portion and the latching portion. A hose clamp characterized by comprising:   The ring is separated in the width direction into two ring elements by slits extending in the circumferential direction, and a narrow rib extending in the circumferential direction is formed on the inner peripheral surface of each ring element. The hose clamp according to claim 1 or 2.

Images