JPS6112471Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a tightening device used when connecting hoses (including tubes made of rubber or soft synthetic resin) to pipe materials, rods, etc. It's about the ingredients.

(Problems to be solved by conventional technology) The following two points are mainly cited as general technical issues regarding hose tighteners.

(b) It is easy to handle; (b) A high tightening force can be obtained for the hose; It is.

Conventional hose fasteners still have these problems, and a solution to these problems has been desired.
The present invention has been disclosed in view of these technical problems, and its purpose is to provide ease of use and ensure secure tightening.

(Means for solving the problem) In order to achieve this objective, the present invention is configured as follows. In other words, it is a band-shaped fastener that is inserted into the mouth of a hose by connecting their ends, and the part that comes into close contact with the hose has a plurality of notches at approximately equal intervals along the length. At the same time, these were configured to be set as biting pieces that could bite into the hose to an appropriate depth by being caulked.

(Function) Therefore, according to the above structure, the ends of the clamping tool are connected to each other and fitted to the mouth of the hose, and under this condition, the hose is connected to the pipe material, etc. Insert it into the After that, each notch is caulked, and these become bite pieces that bite into the hose to the appropriate depth. This allows the hose to receive the biting force of each biting piece at equal angles. That is, the biting force at this time acts as a pressing force (tightening force) on the outer wall surface of the pipe material or the like.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

Figures 1 to 4 show a first embodiment of the present invention, and 1 in the drawings is a tension band that is fitted into the hose H, and is made of a metal material and formed in the shape of a thin plate band. . A wrap portion 3 is formed on one end side via a step 2 approximately equal to the thickness of the tension band 1, and a rectangular engagement hole 4 is bored in the wrap portion 3. On the other hand, on the other end side, an engagement protrusion that can be freely inserted into and removed from the engagement hole 4 is integrally formed to protrude in the longitudinal direction. However, when the tension band 1 engages the engagement protrusion 5 with the engagement hole 4, the inner diameter of the tension ring R, which is formed to have a uniform inner diameter, is equal to the outer diameter of the hose 11 to be tightened. Alternatively, the diameter is set to be smaller than that. Further, in the tensioning band 1, a plurality of notches 6 to 6 are provided at equal intervals along the longitudinal direction between the engaging protrusion 5 and the lap portion 3, and in this example, each of the notches 6 to 6 is the same. It is attached in a U-shape toward the direction of. When the U-shaped cut portions are caulked with an appropriate caulking tool 7 as shown in FIG. I'm starting to do that.

The crimping tool 7 has an arcuate shape at its working end so as to match the outer shape of the tightening ring R formed by the tensioning band 1, and furthermore, the crimping tool 7 has an arcuate shape on its inner peripheral surface corresponding to each of the notches 6 to 6. Pressing claw pieces 10 to 10 are protruded.

Next, an example of use of the first embodiment formed as described above will be explained.

First, while bending the tension band 1 into an annular shape, insert the engagement protrusion 5 into the engagement hole 4, and use an appropriate tool (not shown) to fold it back as shown in FIG. Connect both ends of strip 1. At this time, the end on the side of the engagement protrusion 5 is wrapped with the lap part 3 which bulges outward by a thickness approximately equal to the thickness of the tensioning band 1, so that the inner circumferential surface of the tensioning ring R has a nearly uniform curvature.

The thus obtained tightening ring R is fitted into the mouth of the hose H and then inserted into the pipe P side. Next, apply the pressing claws 10 to 10 of the caulking tool 7 to each of the notches 6 to 6 of the tensioning band 1 and strongly caulk them. Cut into H to an appropriate depth. As a result, each biting piece 6 to 6 applies a certain biting force to the hose H. Therefore, this biting force (the force with which the tip side of the biting piece 6 pushes into the hose H) becomes a tightening force that reliably tightens the hose H, and since the biting pieces 6 to 6 are arranged at equal intervals, The hose H can be tightened reliably and uniformly.

In this manner, in the first embodiment, a high tightening force for the hose H can be obtained by simply crimping strongly with the crimping tool 7, so that the tightening work can be simplified and speeded up. Further, in this example, since there is no part that particularly projects outward in the state in which the tightening ring R is formed, it is effective when used, for example, to connect a rotating body or the like. Furthermore, when the two ends of the tightening ring R are connected by the removable engaging protrusion 5 and the engaging hole 4, the connection can be easily released, and therefore the tightening tool can be easily replaced.

FIG. 7 shows a second embodiment of the present invention. In the second embodiment, the cutting directions of the notches 6 to 6 in the tensioning band 1 are alternately set in opposite directions, so that the cutting directions of the biting pieces 8 to 8 in the tightening ring R cannot be changed. can.
Therefore, in addition to the effects of the first embodiment, the rotation prevention of the tightening ring R can be further strengthened.

In addition, in the above-described tightening work, an example of the work was shown in which the tightening ring R was formed in advance before the hose H was inserted, but the tightening ring R may also be formed after the hose H was inserted. In either the first or second embodiment, flexibility can be given to the order of the tightening work.

Further, the means for connecting both ends of the tension band 1 may be welding means such as spot welding. Furthermore, in the member on the side to which the hose H is connected, the hose H
It is also possible to improve the tightening condition.
For example, as shown in FIG.
It is like forming 1. That is, by tightening at a position that fits the groove 11, the force for preventing the hose H from coming off in the axial direction can be further improved. Furthermore, the tightening ring R
The shape is not limited to an annular shape, but may have a rectangular cross section as shown in FIG. 8, or may have a semicircular shape as shown in FIG. 9.

(Effects of the invention) As described in detail above, according to the invention, the tightening work can be performed by simply caulking each notch, making the work extremely easy. Further, in the present invention, the hose can be reliably tightened by utilizing the biting force of each biting piece. This is because the part of the hose is pressed against the wall surface of the pipe material etc. due to the biting of the biting piece, and this becomes a tightening force against the hose. In combination with the fact that the biting pieces are arranged at equal intervals, the hose can be reliably held with uniform tightening force.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the tension band according to the first embodiment of the present invention, Fig. 2 is an enlarged perspective view showing the connecting part, Fig. 3 is a perspective view showing the state of tightening by the tension ring, and Fig. 4. FIG. 5 is a perspective view of a caulking tool used in the fastening tool of the first embodiment; FIG. 6 is a perspective view of an example in which a groove is provided in a pipe; FIG. The figure is a perspective view showing a tightening state by the tightening ring according to the second embodiment, and FIGS. 8 and 9 are explanatory views showing other examples of the tightening ring. 1... Tightening band, 8... Biting piece, H... Hose, P... Pipe, R... Tightening ring.

Claims (1)

[Scope of utility model registration request] A band-shaped fastener that is inserted into the mouth of a hose by connecting their ends, and the part that comes into close contact with the hose has a plurality of notches arranged at approximately equal intervals along the length. In addition, each cut is caulked to form a biting piece that can bite into the hose to an appropriate depth.