JPH0518057Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tightening tool for a joint member used for connecting water pipes, etc.

[Conventional technology and its problems]

Coupling members such as the socket A shown in FIG. 11a and the tees B shown in FIG. 11b are widely used for connecting and branching water pipes. These joint members have threaded portions 18 on the inner surfaces of their ends, and are coated with anticorrosion coatings on the outer surfaces.

Conventionally, pipe wrenches have been used to tighten these joint members onto water pipes, but the problem with these pipe wrenches is that the teeth of these pipe wrenches tend to dig into the paint film of the joint members and cause scratches, and these scratches can cause rust. be.

The present invention has been devised in view of these conventional difficulties, and is an instrument that can easily tighten all types of joint members without damaging their external surfaces and regardless of their mounting manner or position. Its purpose is to provide.

[Means and actions for solving problems]

For this reason, the present invention has a recessed groove part 1 at the tip, whose inner surfaces facing each other are parallel to each other, and a circular hole 5 at the bottom of the recessed groove part 1 into which the end of the joint member is inserted.
is formed, and a cross section 6 is formed inside the circular hole 5.
It has a mounting part 3b in which a square hole 6 is formed, and a mounting hole 30 with a non-circular cross section is formed at the rear end,
A through hole 7 is formed in the radial direction of the mounting portion 3b,
In the circumferential direction of the outer surface of the mounting part where this through hole is formed,
Its feature is that an annular groove 8 is formed.

Such a fastener tightens the joint member by fitting the joint member into the groove and rotating the joint member.

〔Example〕

Figures 1 to 4 show an embodiment of the present invention, in which a U-shaped member 2b with both inner surfaces parallel to each other is shown at the tip.
The inner side thereof constitutes the concave groove portion 1. A circular hole 5 into which the end of the joint member is inserted is formed at the bottom of the groove 1. This circular hole 5 has a diameter spanning the entire width of the groove portion 1.

Further, a hexagonal hole 6 into which a bolt head or nut can be inserted is further formed at the bottom of the circular hole 5.

The mounting portion 3b at the rear end of the U-shaped member is formed into a cylindrical shape. The mounting portion 3b has through holes 7 formed at positions facing each other by 180° in the radial direction. Also, on the outer periphery of the mounting part, there is an annular groove 8 that passes over the through hole.
is formed. Further, the mounting hole 30 inside the end portion of the mounting portion 3b is configured in a non-circular shape.

Next, how to use the fastener of the present invention will be explained. Figures 5 to 10 are the same as Figures 1 to 4.
This figure shows how the device shown in the figure is used. Of these, FIGS. 5 and 6 show the tightened state of socket A. On both sides of the outer surface of socket A,
A protrusion 9 is formed, and both protrusions 9 engage with the inner surface of the groove 1, so that the socket can be tightened by turning the handle 4. Moreover, FIG. 7 shows the tightened state of Tease B.

This tightening tool A is designed to be able to grip the socket A from one end thereof. FIG. 5 shows such a state of use, in which one end of the socket A is inserted into the circular hole 5 of the groove 1, and
The protrusions 9 on both sides engage with the inner surface of the groove 1, and the socket A is tightened into the pipe C by turning the tightening tool A. Such tightening requires the fastener to be rotated around its core, and for this purpose the handle 4 must be rotated at right angles to the longitudinal direction of the fastener.
are concatenated. The handle 4 has a connecting portion 10 at its distal end that projects in a direction perpendicular to the longitudinal direction of the handle. An engaging protrusion 11 (comprised of a ball or the like) that can be pushed in by being supported by a spring is provided on the side of the connecting portion 10. Such a handle 4 is connected to a tightening tool by fitting its connecting portion 10 into the mounting hole 30 of the mounting portion 3b and engaging the engaging protrusion 11 with the through hole 7.

In addition, in FIGS. 6 and 7, in order to connect the handle 4, the shaft body 12 is supported in the through holes 7, 7 of the attachment part 3b, and an elastic ring made of rubber or the like is placed in the annular groove 8 on the outer periphery of the attachment part. 13 is fitted to prevent the shaft body 12 from falling off.

8 and 9 show the handle connection structure in this case, in which a connection part 10 consisting of a pair of gripping members 14 is provided at the tip of the handle 4. Each gripping member 14 is pivoted 15 at its intermediate portion to the handle body, and allows the shaft 12 to be inserted into opposing recesses 16 on the distal end side. A spring 17 is interposed at the rear ends of both gripping members 14, and biases both gripping members 14 in a direction in which their distal ends close.

In addition, by making the handle 4 long as shown in Fig. 10, the tightening tool of the present invention can be inserted from the upper gap even in places where conventionally it was impossible to tighten without destroying the wall surface D. Socket A can be tightened with .

[Effect of idea]

According to the present invention described above, by rotating the joint member while it is fitted in the groove, it is possible to easily tighten the joint member without damaging the paint film of the joint member. .

In particular, since the instrument of the present invention is provided with a circular hole at the bottom of the recessed groove, it is possible to easily tighten not only joint members such as so-called tees and elbows, but also sockets as shown in FIG. 11a.

Furthermore, as shown in FIGS. 5 and 6, the device of the present invention allows the handle to be attached to its mounting portion in two ways, so that the handle can be attached to the socket as shown in FIG. Rotation operation and
Further, it is possible to perform rotation around an axis as shown in FIG. 5, and the use can be made depending on the joint member such as a socket and the mounting position.

Therefore, even when the socket is installed in a narrow space as shown in FIGS. 5 and 10, the socket can be easily tightened. In particular, tightening and removal work can be easily performed not only with elbows, but also with sockets, teeth, etc., even in locations that conventionally could not be done without destroying the wall surface.

Further, the hole having a hexagonal cross section formed inside the circular hole allows cap bolts and the like to be tightened to the joint member etc. as appropriate.

As described above, the instrument of the present invention can be used in a variety of ways, making it an extremely versatile instrument as a piping tool.

[Brief explanation of drawings]

Figures 1 to 10 show an embodiment of the present invention, in which Figure 1 is a perspective view, Figure 2 is a plan view, Figure 3 is a side view, Figure 4 is a longitudinal sectional view, and Figure 5 is a side view. 7 through 7 are explanatory diagrams each showing the state of use. 8 and 9 show an example of the connection structure of the handle shown in FIG. 6, where FIG. 8 is a longitudinal sectional view and FIG. 9 is a sectional view taken along line XII-XII in FIG. 6. . FIG. 10 is an explanatory diagram showing another usage situation. Figures 11a and 11b are perspective views showing the joint member. In the figure, 1 is a concave groove part, 3b is a mounting part, 5 is a circular hole, 6 is a hole part, 7 is a through hole, 8 is an annular groove, 30
is the mounting hole.

Claims (1)

[Scope of utility model registration request] The tip has a recessed groove 1 whose opposing inner surfaces are parallel to each other, and the bottom of the recessed groove 1 is formed with a circular hole 5 into which the end of the joint member is inserted. A hole 6 with a hexagonal cross section is formed inwardly of the mounting portion 3b, and a mounting hole 30 with a non-circular cross section is formed at the rear end of the mounting portion 3b. A tightening tool for a piping joint member in which a hole 7 is formed and an annular groove 8 is formed in the circumferential direction of the outer surface of the attachment part at the position where the through hole is formed.