JPS638618Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a tightening device that can increase the tightening force and prevent any loosening when tightening one or more cylindrical objects together with a string or wire. Regarding.

2. Description of the Related Art Strings and wires are often tied tightly to objects in everyday life. Examples include the packing of general parcels, and the industrial use of multiple steel, concrete, etc. pipes, rods, etc., tied together for transportation or storage. In addition, in order to fix the outer layer tube of a double-layered tube, in which the inner and outer layer tubes are not fixed and move freely and the inner layer tube is longer, to the inner layer tube from the outside, the above-mentioned string or wire is attached to the surface of the inner layer tube at the end of the outer layer tube. There are cases where the movement of the outer layer pipe is stopped by wrapping it strongly. However, in either case, it is not easy to maintain the fastened state by bringing the string or the like into strong contact with the rigid body.

The commonly used strong tightening methods include the method of wrapping wire, etc., and twisting the ends together (twisting method), and tying them with something with frictional force, such as a non-slip leather belt. A method of inserting a wedge-shaped object between the tied wire, etc. and the object, etc., or a method of gradually tightening a wire, etc. with bolts with reverse threads at both ends using a single nut. There is. This method using bolts and nuts (so-called screw mechanism) is quite easy to adjust and maintain a constant tightening force, and additional tightening is also possible, but in this case, the rotation of the nut is involved, and the fastening wire such as a string or wire is In order to eliminate kinks, it is preferable to provide a rotating joint in the middle, and furthermore, when the nut is located away from the surface of the object to be fastened, operation is easy; Tightening operations are extremely difficult because they can damage the products to be fastened. Further, the other methods mentioned above, such as the wire twisting method, allow for additional tightening, but it is extremely difficult to adjust the tightening force, and the wire often breaks during tightening. It is extremely difficult to retighten it as necessary without damaging it.

The present inventors have completed a tightening tool that is simpler and more versatile than the above-mentioned known methods, and can be easily applied to large or small objects, and to one or more pipes, etc. As a result of research aimed at this purpose, we completed this invention.

That is, the present invention is in a symmetrical position with respect to the central axis,
In addition, a tightening linear body of a desired length is placed in the pair of grooves or holes of a high elastic ring having a pair of grooves or holes provided in the side wall, and both ends thereof are attached to the outer surface of the ring of the pair of grooves or holes, respectively. forming a latching part, and extending from the latching ends oppositely and parallel to each other into the ring, and arranged so as to pass through other grooves or holes, and attached to the ring. When the ring is deformed into an elongated circular shape by applying pressure perpendicularly to the tightening linear body, the distance between both grooves or holes increases, and the tension increases on the tightening linear body. The present invention relates to a fastener that can increase tightening force.

Next, the present invention will be explained based on drawings showing specific embodiments.

FIG. 1 shows an embodiment of a ring constituting the fastener of the present invention, in which 1 is a ring, and 2a is on the side wall of ring 1, and two rings are provided at almost symmetrical positions with respect to the center axis of the ring. It is a circular hole.

FIG. 2 shows another embodiment of the ring, in which the grooves designated 2b are symmetrically provided in the ends of the side walls of the ring, as in the case of the holes described above, as shown in the figure.

The ring is generally circular in both Figures 1 and 2, but it does not necessarily have to be a perfect circle; it may be an ellipse, etc., and should have elasticity against pressure applied from the normal direction of the ring toward the central axis. Any shape shown may be used. The shape and number of the grooves and holes are not specified, and it is sufficient that they have a shape and size that allows the tightening linear body to freely pass through and be accommodated therein, and a plurality of grooves and holes may be provided depending on the number of the linear bodies. You can.

The material of the ring is not specified as long as it has strong elasticity as described above, and metals, plastics, etc. can be used as appropriate, but as will be described later, when used as the fastener of the present invention, it will be destroyed. It is necessary to be able to sufficiently withstand deformation stress and stress applied to the latching portion without causing any damage.

FIGS. 3 and 4 are plan views showing the ring shown in FIGS. 1 and 2 in which the end portions of the tightening linear body 3 are assembled in opposite directions. The tightening linear body is a general term for strings, wires, etc., but in the illustrated case it is a wire, and both ends of the wire are bent and hooked on the outer surface of the groove or hole of the ring. Further, in the illustrated cases, there is one tightening linear body, but it is also possible to use a plurality of tightening linear bodies. Naturally, the length of the tightening linear body is appropriately selected depending on the size of the object to be tightened.

Next, a tightening method using the tightening tool of the present invention will be explained.

First, wrap the tightening wire around the object so that the length is approximately equal to the length required to fasten the object, and insert both ends of the tightening wire into the two holes of the spring steel ring shown in Figure 1. , insert them from opposite directions, tighten them as much as possible, and then bend both ends to lock them.
Next, pressure F is applied to the ring in a direction perpendicular to the tightening linear body inside the ring to deform the ring into a slender circular shape.The distance between both holes increases, and tension (tightening force) is applied to the tightening linear body. and increase it. A suitable clamping attachment is used to maintain the pressure applied to the ring. This pressured state is shown in FIG.

When pressure is applied as described above, if the tension of the tightening linear body before pressure is applied is T, and the tension after pressure is applied is T', it is clear that T<T'.
The fastening force against the target substance increases.

Furthermore, if the length of the tightening linear body between the holes of the ring in FIG. 3 is L, then L is the radius R of the ring.
Since it is twice as large, L≒2R (1).

When the ring shown in FIG. 3 is crushed to a considerable degree, the length L' of the tightening linear body between the holes in the ring can be regarded as πR. That is, L'≒πR (2) From (1) and (2), L': L = π: 2 = 1.57:1 In other words, the fastening force has improved by more than 50% when crushed to the limit. Therefore, by appropriately selecting the materials of the ring and tightening linear body used and the pressure applied to the ring, the tension of the tightening linear body can be set appropriately.

Next, an example of actual use of the fastener of the present invention will be shown.

1 Applicable to general packing. It is particularly suitable for packing cylindrical products with hard surfaces that are difficult to fasten.

2. When transporting or storing cylindrical materials made of metal or plastic, etc., when it is necessary to bundle multiple materials into a bundle, it is necessary to tighten them to a certain degree, and beyond that, the tightening device according to the present invention will not be used. Can be easily and reliably rolled.

3. Can be applied to fixing the cement fire-resistant coating layer to the inner pipe of fire-resistant drainage pipes with multi-layer pipe structure. Fire-resistant drain pipes are hard plastic pipes coated with a lightweight, fire-resistant material, and can be used in all aspects of drainage equipment, especially in urban buildings that require non-combustibility. It is. 6th
The figure shows an example of this fire-resistant drainage pipe. 4 is a drainage inner pipe made of hard vinyl chloride, 5 is a fire-resistant coating made of lightweight mortar containing perlite, etc. When exposed to heat, it expands and tends to destroy the coating, so a gap is created between the fireproof coating and the inner and outer layers to allow for free sliding.
The inner drain pipe is longer than the covering material and both sides are exposed as shown in FIG. 6 for connection with the joint pipe.
This fireproof drainage pipe is sometimes stored upright or transported to the site during construction, but as mentioned above, the inner drainage pipe is slidably installed inside the cladding pipe, so it is prevented from sliding. It must be easily fixed and removable. The fastener of the present invention can be used as this fixing means.

Specifically, the fastener 6 according to the present invention is attached to either or both of the left and right exposed portions of the inner drainage pipe 4, and pressure is applied to the ring in the aforementioned direction.
By increasing the tension in the clamping wire, the clamp is better secured, which prevents movement of the cladding.

A hard vinyl chloride pipe is preferably used for the inner pipe for drainage, but when applying a fastener to such a pipe with a hard surface, in order to further reduce slippage, the following tightening linear body is used: What is shown is most effective.

(1) Soft rubber (hardness durometer 60° or less)
A tightening wire body in which one or more metal wires are passed through a tube.

This tightening linear body utilizes the deformation of rubber and frictional force.

(2) In (1), instead of rubber, a soft PVC tube whose hardness is similar to that of rubber is used.

As described above, the tightening tool of the present invention has a simple structure, but instead of the conventional method or device of tightening two points close together, it uses special rings that are combined to tighten two points far apart. This feature makes it easy to install and has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a diagram showing one embodiment of the ring constituting the fastener of the present invention, FIG. 2 is a diagram showing another embodiment of the ring constituting the fastener of the present invention, and FIG. Figure 4 is Figure 1 and Figure 2, respectively.
FIG. 3 is a plan view showing a state in which the end portions of the tightening linear body 3 are installed in the ring shown in the figure in opposite directions. FIG. 5 is a diagram showing a state in which pressure is applied to the ring of the present invention, and FIG. 6 is a diagram showing an example in which the fastener of the present invention is used in a fire-resistant drain pipe. 1...ring, 2a...hole, 2b...groove, 3...
... Linear body for tightening, 4 ... Inner pipe for drainage, 5 ...
Fireproof covering material, 6... tightening tool.

Claims (1)

[Claims for Utility Model Registration] A high-elastic ring having a pair of grooves or holes located symmetrically with respect to the central axis and provided in the side wall, for tightening to a desired length in the pair of grooves or holes. The linear body has both ends forming hooking portions on the outer surfaces of the rings of the pair of grooves or holes, and from the hooking ends,
extending oppositely and parallel to each other within the ring, each passing through the other groove or hole, and by applying pressure to the ring in a direction perpendicular to the tightening wire. , a fastening tool that can increase the tightening force by deforming the ring into an elongated circular shape, increasing the distance between both grooves or holes, increasing tension on the tightening linear body.