JPS5829339Y2 - hose clamp - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hose fastener used when connecting a hose to a faucet end, other pipe end, etc.

Conventionally, this type of fastener is made by forming a flat strip material into a ring shape.
Furthermore, a gripping part, that is, a knob attachment part, is formed at both ends of the ring. When using the ring, the ring is fitted onto the outer circumferential surface of the hose by holding the knob with your fingertips so that the diameter of the ring expands. The hose was tightened by elastic restoring force.

However, if the width of the ring is increased, it will have a strong elastic force, making it difficult to grasp the knob with your fingertips, and a strong tightening force will be applied to the hose, causing it to be easily damaged. On the other hand, if the width of the ring is made smaller, the elastic force will be weakened and manual operation will be easier, but since the contact surface with the hose will be reduced, the pressure per unit area on the hose will be excessive and the hose will not be damaged. I couldn't escape it.

In addition, when using such a fastener, it is desirable to elastically deform the ring into a substantially perfect circular shape to tighten the outer peripheral surface of the hose with substantially uniform pressure.

As a measure to meet the various demands mentioned above,
According to Japanese Patent No. 3-19458, "A rim portion is formed on the opposite circumferential surface facing the tooth piece, and the depth of the rim portion is defined to become gradually shallower from the center of the rim to the sharp end of the image." Although the technique is disclosed, in this case, the present specification No. 7
As is clear from the enlarged view in the figure, the hose H is particularly tightened by the rim portion R, and concentrated stress is applied to the hose by the left and right edges E, E of the ring.
has the disadvantage of causing cracks C and C.1 Also, the rim portion R
There was also the drawback that moisture could be trapped inside the hose, causing damage to the hose.

Furthermore, when the hose fastener is fitted onto the hose H and then shifted in the longitudinal direction of the hose, the side edge E damages the outer circumferential surface of the hose.

The present invention was developed especially to eliminate the various drawbacks mentioned above, and is made up of reinforcing pieces bent outward into a substantially U-shaped shape on both left and right edges of the opposing semicircumferences of the gripping part. In addition, the bending width of the reinforcing piece is maximized at the center of the ring and gradually decreases toward the ends, so that the moment of inertia of area is maximized at the center of the ring and gradually decreases toward both ends. By holding the circle and elastically deforming the ring, it is possible to obtain a nearly uniform tightening force over the entire circumference of the hose, and it is also possible to prevent the hose from being pulled out or damaged, and it is easy to process during molding. It is an object of the present invention to provide a hose fastener that can eliminate waste of materials.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

Reference numeral 1 denotes a ring made of a flat strip material formed into a ring shape to maintain elasticity.Both ends of the ring are notched in a tongue-and-groove shape, and the ring 1 is bent at a substantially right angle to the outer circumferential surface of the ring 1 to form a grip portion 22.
are formed and can intersect with each other, and furthermore, claws □ 3, 3 having grooves, knurls, or other uneven surfaces formed on the outer surface are attached to the gripping parts 2, 2. .

The ring 1 has a symmetrical reinforcing piece 4° 4 which is bent outward in a substantially curved shape along the left and right edges of the ring 1 with respect to the approximately semicircular circumference facing the gripping portion. is formed.

Moreover, the bending width of the reinforcing piece 4.4 is maximum at the center of the ring, that is, the center opposite the gripping part 2, and gradually decreases toward both ends of the ring, as shown in FIG. It is formed.

Subsequently, the functions and effects of this embodiment will be explained.

Hold the knob 3.3 between your fingertips, etc., elastically deform the ring 1 in the direction in which its diameter expands, insert the ring 1 into the hose H, position it on the part to be tightened, and then tighten the knob. When the clamps 3 and 3 are released, the diameter of the ring 1 is elastically restored in the direction of contraction, and this restoring force reliably connects the hose H to the end of a pipe such as a faucet.

At this time, since reinforcing pieces 4 to 4 formed by bending in a square shape are provided facing each other on both sides of the ring 1, the elastic force is greater than that of a conventional simple flat band-shaped ring. ,
Moreover, the moment of inertia of the ring 1 is maximum at the opposite center of the gripping part 2, that is, the point where the bending stress is maximum, and gradually decreases toward both ends of the ring 1, so that the ring 1 becomes a perfect circle when elastically deformed. The hose H can be tightened with substantially uniform pressure over its entire circumference.

In addition, by appropriately selecting the bending width of the reinforcing piece 4°4 in accordance with the inner diameter size, material thickness, and width of the ring 1,
An appropriate tightening force can be set for the hose H (according to the tightening tool of the above-described embodiment, the hose H
As shown in Fig. 4, the outer surface of the hose H is guided by the inner surfaces of the left and right edges 4, 4, and is tightened while forming a gentle curved surface. No stress concentration is applied to H.

Therefore, the outer surface of the hose H is not damaged or cracks are generated in the hose H.

Furthermore, since the ring of the fastener of the present invention does not have the sealing part G seen in the conventional example shown in FIG. 1, there is no fear that the hose H will be damaged by moisture sealed in the groove.

Furthermore, since the ring of the fastener of the present invention has an extremely simple shape as shown in FIGS. 5 and 6, it is easy to press and greatly contributes to cost reduction.

In addition to the shape of the above-described embodiment, the bent shape of the reinforcing piece of the button of the fastener of the present invention can also be formed into an arcuate shape.

That is, the hose fastener of the present invention is a fastener formed such that a ring made of a flat strip material can compress the outer diameter of the hose by elastic deformation, and has a tongue-and-groove or phase-shaped engagement. Holding portions are formed at both ends of the ring and are formed so as to be able to intersect with each other. By providing a reinforcing piece bent in the shape of a square, and forming the bending width of the reinforcing piece to be maximum at the center of the ring and gradually decrease toward both ends, the moment of inertia of area is applied to the center of the ring. The ring is elastically deformed by keeping the ring at its maximum and gradually decreasing toward both ends, thereby tightening the hose almost uniformly over the entire circumference to prevent fluid leakage within the hose. It is possible to prevent the hose from being pulled out or damaged, and furthermore, during molding, press processing is easy and waste of material can be eliminated.

[Brief explanation of the drawing]

Carp shows an embodiment of the present invention, FIG. 1 is a perspective view of the entire hose clamp, FIG. 2 is a front view of the same, and FIG. 4 is an enlarged sectional view illustrating the function and effect of the reinforcing piece, which is the main part of the present invention, and Figure 5 is a line sectional view.
The figure is a developed plan view of the ring, and FIG. 6 is a developed front view thereof. FIG. 7 is an enlarged sectional view illustrating the drawbacks of the reinforcing piece of the conventional fastener. 1...Ring, 2...Gripping part, 4...
...Reinforcement piece.

Claims (1)

[Scope of utility model registration request] A fastening device in which a ring made of a flat strip material can compress the outer diameter of a hose by elastic deformation, and is formed so that it can cross each other by engaging in a tongue-and-groove or phase-shaped engagement. A reinforcing piece formed by forming gripping portions on both ends of the ring and bending the left and right edges of a substantially semicircular surface facing the gripping portions outward in a substantially U-shape. 1. A hose fastener characterized in that the reinforcing piece has a bending width that is maximum at the center of the ring and gradually decreases toward both ends.