JPS6314144Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a tightening tool for tightening the connecting portion of a hose connected to a pipe material or the like.

(Conventional technology) As a conventional technology, for example, Utility Model Application No. 52-31923
Publication No. 16658, Publication No. 16658, etc.

(Problem to be solved by the invention) In the case of a conventional tightening tool of this kind, in which the inner diameter of the tightening band is expanded or contracted by the screw operation, the hose is tightened. There is a problem that the screwing operation is complicated and the tightening force varies between tightening tools.In addition, in the case of a tightening ring that tightens the hose only by its own elastic force, it is necessary to increase the elastic force of the tightening ring. Although this increases the tightening force, it becomes difficult to fit the tightening ring onto the hose, and while it facilitates the fitting operation of the tightening ring onto the hose, there is a problem in that the tightening force is insufficient.

An object of the present invention is to provide a tightening tool that can be fitted into a hose smoothly, and can strengthen and stabilize the tightening force.

(Means for Solving the Problems) The present invention has a cylindrical grip tube made of spring material, in which the hose is inserted and tightened, and the grip tube is diagonally extended from one end edge to the other end edge. A spiral groove for cutting is formed, and a pair of free end portions formed on both sides of this groove are respectively provided with a hooking hole for an expansion operation tool. At the free end, a pair of escape parts are formed by bending both pointed ends, which are each formed into a sharp shape with respect to the tips of the free ends near both ends in the axial direction of the gripping tube, into a curved shape. and a resilient force reinforced by the resilient force of the gripping cylinder, which is formed into a substantially C-shape for penetrating the gripping cylinder and centripetally tightening the gripping cylinder and the hose with its own elastic force. The gist is that a locking hole for an expansion operation tool is provided through both free ends of the tightening ring.

(Function) The tightening tool of the present invention has a cylindrical grip tube that is cut diagonally by a groove extending from one end edge to the other edge to form a pair of free ends, and the elastic force of this grip tube. A C-shaped tightening ring with enhanced elasticity is used in combination, and the gripping tube can be fitted into and removed from the hose by means of both the free ends and the relief parts formed at the free ends. This structure facilitates operation and tightens the hose with a combined elastic force of the elastic force of the grip tube and the elastic force of the tightening ring.

(Example) Next, a first example of the present invention will be described with reference to FIGS. 1 to 3.

The tightening tool includes one gripping tube 1 formed into a cylindrical shape made of spring material with a certain thickness in order to penetrate and tighten the hose H, and a gripping tube 1 formed in a cylindrical shape made of spring material with a constant thickness to penetrate and tighten the hose H. It is composed of two mold-shaped tightening rings 6, 6. A groove 3 is formed in the grip tube 1 to cut the grip tube 1 diagonally from one end edge to the other edge, and on both sides of the groove 3, a pair of free ends 2, 2 cut the groove 3. The gripping cylinder 1 is formed in parallel with the groove 3.
It is elastically deformed by the expansion of the inner diameter, and its inner diameter is expanded elastically.

In order to prevent the hose H from getting caught or bitten when the hose H is inserted into the grip tube 1, the free ends 2 are provided with sharp edges near both ends of the grip tube 1 in the axial direction. A pair of relief portions 4 are formed by bending both of the formed pointed ends into a curved shape, and a pair of relief portions 4 for use as an expansion operation tool are formed on both sides of the groove 3 at the center of both free end portions 2. A locking hole 5 is provided therethrough.

In a free state, the inner diameter of the gripping tube 1 is slightly smaller than the outer diameter of the hose H, and when the inner diameter is expanded, an elastic force is generated to tighten the hose H centripetally.

A locking hole 9 for an expansion operation tool is provided through each free end portion 7 of both tightening rings 6, and
The width of both tightening rings 6 gradually decreases from near the center to both free ends 7, respectively.

The inner diameter of both tightening rings 6 is the same as that of the gripping cylinder 1 in the free state.
The inner diameter of the tightening ring 6 is slightly reduced compared to the outer diameter of the tightening ring 6, and is elastically deformed by expanding the opening 8 between the two free ends 7, and the inner diameter of the tightening ring 6 is expanded. At times, an elastic force is generated to tighten the grip tube 1 and the hose H centripetally.

The elastic force of both tightening rings 6 is stronger than the elastic force of grip tube 1, and the hose H can be tightened by the combined elastic force of grip tube 1 and both tightening rings 6.

Note that, as shown in FIG. 3, it is desirable that the groove 3 of the grip tube 1 and the openings 8 of both tightening rings 6 be arranged in opposite directions.

Next, the operation and effects of the embodiment having the above configuration will be explained.

First, the gripping tube 1 and both tightening rings 6 are placed in a separated state near the connection part of the hose H, and then the inner diameter of the gripping tube 1 is expanded with an expansion operation tool, and the gripping tube 1 is expanded.
to the tightening position of hose H (Fig. 2a)
reference). In this state, the hose H is tightened by the elastic force of the grip tube 1 itself. Next, when the inner diameters of both tightening rings 6 are expanded in the expansion operation process and both tightening rings 6 are fitted around both ends of the grip cylinder 1 in a spaced apart state (see FIG. 2b), both tightening rings 6 tightens the grip tube 1 and the hose H centripetally with its own elastic force to reinforce the elastic force of the grip tube 1, and the hose H uses the combined elastic force of the grip tube 1 and both tightening rings 6. It is firmly tightened by.

Therefore, the clamping force on the hose H is reduced by the gripping tube 1.
The hose H can be strengthened and stabilized by the combined elastic force of both the tightening rings 6, and the hose H can be tightened with a uniform tightening force over the entire length of the grip tube 1.

Furthermore, since a pair of locking holes 5 and 9 are formed in each of the gripping tube 1 and both of the tightening rings 6, the gap between the respective locking holes 5 and 9 can be expanded or contracted to tighten the gripping tube 1.
In addition, the inner diameters of both tightening rings 6 can be easily expanded or contracted, which simplifies handling of the tightening tool, and the gripping tube 1 is cut diagonally with the groove 3 from one end edge to the other edge and gripped. Since escape parts 4 are formed at both free ends 2 of the tube 1, the sliding resistance when the grip tube 1 is fitted into the hose H is reduced, and the edge of the grip tube 1 gets wedged into the hose H. is avoided, and the fitting operation of the gripping tube 1 into the hose H can be made smoother. In addition, when the gripping tube 1 is fitted into the hose H and then the gripping tube 1 is tightened with the tightening ring 6, the hose H is removed between the grooves 3. This eliminates the problem of a part of the hose H bulging out, and has the effect of suppressing local deformation when the hose H is tightened.

Furthermore, since the gripping tube 1 is cut with grooves 3 that are inclined with respect to the axial direction and the circumferential direction, the portions where the tightening force of the gripping tube 1 is weakened due to the expansion of the grooves 3 are the axial direction and the circumferential direction. The clamping force of the gripping tube 1 against the hose H is distributed in the circumferential direction, respectively, in the axial direction and in the circumferential direction, compared to a conventional clamping ring having a groove cut linearly along the axial direction. It can be balanced.

In particular, since the two tightening rings 6 can tighten the grip tube 1 and the hose H by their own elastic force, there is no need for a separate member for tightening, which simplifies the handling. This has the effect of ensuring a constant tightening force by eliminating excessive or insufficient tightening force due to separate members.

Next, the second embodiment of the present invention shown in FIG. On the other hand, a slightly protruding engagement protrusion 11 is formed at the center of the inner edge of both tightening rings 6 to engage with both engagement grooves 10 and position the tightening ring 6. ing. This tightening ring 6 can be fitted externally into the gripping tube 1 by expanding the distance between the two locking holes 9 with an expansion operation tool and fitting the gripping tube 1 into the opening 8. can.

In addition, in this example, the locking protrusion 11 of the tightening ring 6 is engaged with the engagement groove 10 of the grip tube 1, so that the tightening ring 6 is prevented from shifting or wobbling, and the hose, which is particularly susceptible to vibrations and shocks, is Effective when tightening.

Note that the other functions and effects of the second embodiment are the same as those of the first embodiment, so their explanation will be omitted.

(Effect of the invention) In other words, in order to insert and tighten a hose, the clamping tool of the present invention has a cylindrical gripping cylinder made of a spring material, and the gripping cylinder is diagonally extended from one end edge to the other end. A groove for cutting is formed, and a pair of free end portions formed on both sides of the groove are provided with a hooking hole for an expansion operation tool, respectively. In order to fix the gripping cylinder, a pair of relief parts are formed by bending both pointed ends, which are each formed into a sharp shape with respect to the tip of the free end part, in a curved shape near both ends in the axial direction of the gripping cylinder. A tightening ring having a substantially C-shape and having a resilient force enhanced by the resilient force of the gripping cylinder for penetrating the cylinder and centripetally tightening the gripping cylinder and the hose with its own elastic force. By having hooking holes for the expansion operation tool penetrated through both free ends of the hose, the hose can be stably and firmly tightened by the combined elastic force of the grip tube and the tightening ring. The tightening ring can tighten the grip tube and the hose with its own elastic force, making it easier to handle and ensuring stable tightening force. This has the effect of facilitating the mating and unmating operation.

[Brief explanation of the drawing]

Figures 1 to 3 show a first embodiment of the present invention, with Figure 1 being a perspective view of the fastener, and Figures 2a and 2b being explanatory diagrams showing the implementation of the fastener step by step. , FIG. 3 is a sectional view taken along the line -- in FIG. 2b, and FIG. 4 is a perspective view showing the fastening tool of the second embodiment. 1... Gripping tube, 2... Free end, 3... Groove, 4
...Escape part, 5...Latching hole, 6...Tightening ring,
7...Free end, 9...Latching hole, H...Hose.

Claims (1)

[Scope of utility model registration request] In order to insert and tighten the hose, a cylindrical grip tube made of spring material is provided with a groove that cuts the grip tube diagonally from one end edge to the other. A pair of free end portions formed on both sides of the groove are respectively provided with latching holes for the expansion operation tool, and the two free end portions are provided with a pair of latching holes for the expansion operation tool, and the two free end portions are provided with a pair of locking holes for the expansion operation tool. A pair of escape parts are formed by bending both pointed ends, each of which is formed into a sharp shape, into a curved shape with respect to the tip of the free end part, and the gripping cylinder is inserted through the gripping cylinder and the hose itself. The tightening ring is formed into a substantially C-shape for centripetal tightening with the elastic force of the gripping tube, and has an elastic force reinforced by the elastic force of the gripping tube. A fastening tool for a hose, characterized in that a hook hole is formed through each of the holes.