JPH1151015A - Joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint which can connect piping while the piping is being tightly fastened without using any electrically driven tool, and can perform sufficiently the connection work of piping by letting the joint be set in the piping and the like in advance. SOLUTION: In this joint 21, a head part 23 continuously connected with a shaft part 22, is formed out of a base part 24 composed of a column 24c supporting a second base portion 24b on the first base portion 24a where a first base portion 24a is continuously connected with the shaft part 22, and a hole is opened in the second base portion 24b, of a slide 25 which is energized to the second base portion 24b side by an elastic piece 25b so as to be brought into contact with the first base portion with pressure where a female screw portion 25a is projected to the inner side of the hole 24h out of the column 24c, and of a side cover 26 having a conical surface 26f which guides the slider 25 energized by the elastic piece 25b in such a way that the slider is contracted so as to be closed, and also guides the slider in such a way that the slider is widened so as to be opened when the slider is pushed against the energizing force of the elastic piece 25b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint suitable for sequentially connecting pipes used, for example, when burying cables or the like in the ground.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view showing an example of a conventional joint and a pipe, and FIG. 8 is a sectional view showing a state in which the pipe is connected by the joint shown in FIG. In FIG. 7,
A part of the joint, that is, a part of the shaft is omitted. FIG. 8 is a sectional view corresponding to line AA in FIG.

[0003] In these figures, reference numeral 1 denotes a quadrangular prism-shaped pipe, and insertion holes 2 through which cables are inserted are provided at four corners so as to penetrate in the axial direction. It is provided so as to penetrate in the direction. The connection hole 3 includes a through hole 3a through which the shaft portion 12 of the joint 11 is inserted, and columnar concave portions 3b provided at both ends of the through hole 3a. Reference numeral 4 denotes a packing, which is disposed between the pipes 1 and 1, and has a predetermined size corresponding to the insertion hole 2 and the connection hole 3.

[0004] Reference numeral 11 denotes a metal joint. A shaft portion 12 having a male screw portion 12a on one end side, and a shaft portion 12
And a hexagonal prism-shaped head 13 provided at the other end of the head. In the center of the head 13, the male screw portion 12
A female screw 13a with which a is screwed is provided in the axial direction of the shaft portion 12.

Next, connection of pipes will be described. First, the first joint 11 is inserted into the concave portion 3b on the left side of the pipe 1.
Then, the shaft portion 12 of the second joint 11 is inserted into the through hole 3a from the concave portion 3b on the right side of the pipe 1. Then, the second thread, that is, the right joint 11 is attached to the first thread, that is, the female screw 13a of the left joint 11.
The pipe 1 can be held between the two joints 11 by screwing the male screw portions 12a of the pipe 1.

Next, another pipe 1 is located on the right side of the pipe 1.
Is disposed via the packing 4, the head 13 is inserted into the left recess 3 b of the right pipe 1. At this time, each hole of the packing 4 is made to correspond to the insertion hole 2 and the connection hole 3, and the insertion hole 2 and the connection hole 3 are connected. Then, the shaft portion 12 of the joint 11 is inserted into the through hole 3a from the right concave portion 3b of the right pipe 1 and the male screw portion 12a of the right end joint 11 is screwed into the female screw 13a of the middle joint 11 to be tightened. Thereby 2
One pipe 1 can be connected by three joints 11.

Thereafter, by performing the same operation sequentially,
As shown in FIG. 8, the pipe 1 can be connected by a joint 11.

Next, insertion of a cable into a pipe will be described. A cable is inserted into each of the insertion holes 2 of the pipe 1 connected as described above, and the cable is buried together with the pipe 1 and the joint 11 in the ground. In addition, although the example which inserted the cable into each insertion hole 2 after connecting the piping 1 was demonstrated, you may insert a cable into each insertion hole 2 while connecting the piping 1.

[0009]

The conventional joint 11
Has a female screw 13a provided on the head 13, so that when the male screw portion 12a of the right joint 11 is screwed into the female screw 13a of the left joint 11, the pipe 1 is connected, the two joints 11 are tightened. It is necessary to screw the male screw portion 12a into the female screw 13a until the pipe 1 is clamped. Therefore, since the joint 11 has to be rotated many times, a power tool or the like is required for connecting the pipe 1. Also, when connecting the pipe 1,
Since the joints 11 must be inserted one by one into the connection holes 3 at the site, the joints 11 are
The time required for insertion for each connection is required, so that the work efficiency of the connection work of the pipe 1 is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned inconvenience, and it is possible to tightly connect pipes without using an electric tool or the like, and set the pipes or the like in advance. Accordingly, it is possible to provide a joint capable of efficiently connecting pipes and the like.

[0011]

SUMMARY OF THE INVENTION The present invention provides a joint in which a female screw to which a male thread is screwed is provided in the axial direction of the shaft on a head provided on the other end of a shaft having a male thread on one end. , A first base portion located at the other end of the shaft portion, a second base portion having a hole through which the shaft portion can be inserted, and a second base portion positioned around an extension of the hole. First
A first base portion including a base formed by a column supported to face the base portion and a female screw portion forming a female screw to be screwed into the male screw portion, from between the columns to the inside of an extension of the hole of the second base portion; At least one slider which is biased toward the second base portion by an elastic piece provided at one end of the slider, and which is closed when the slider is biased toward the second base portion by the elastic piece. Guide the slider,
When the slider is pressed against the first base portion against the biasing force of the elastic piece, the slider has a guide inclined surface that guides the slider to expand so that the male screw portion can be inserted. At least one fixed between the two base parts
And two side covers. Then, the shaft portion can be press-fitted and locked, and it is desirable to provide a locking member facing the head with the shaft portion pressed in.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a joint according to an embodiment of the present invention, and FIG. 2 is a perspective view of a base B shown in FIG.
FIG. 3 is a sectional view taken along line B of FIG.
FIG. 4 is a sectional view taken along line DD of FIG. 1; FIG. 5 is a side view in which each part shown in FIG. It is operation | movement explanatory drawing. In FIG. 1, a part of the joint, that is, a part of the shaft is omitted.

In these figures, reference numeral 21 denotes a joint, and a shaft portion 22 provided with a male screw portion 22a at one end.
And a head 23 provided on the other end side of the shaft portion 22 and a locking member 28 made of plastic. The head 23 includes a base 24 formed of plastic integrally with the shaft 22, a slider 25 formed of plastic, and a side cover 26 formed of plastic.
And a cover 27 made of a metal plate.

The base portion 24 includes a regular hexagonal first base portion 24a located at the other end of the shaft portion 22 and a shaft portion 22.
Or a regular hexagonal second base portion 24b having a hole 24h into which the male screw portion 22a can be inserted, and a hole 2h.
180 supporting the second base portion 24b so as to face the first base portion 24a around the extension of 4h.
It is composed of two columns 24c positioned in a positional relationship of degrees.

The slider 25 has a male screw portion 22a.
The female screw portion 25a constituting the female screw to be screwed into
4c, it protrudes inward of the extension of the hole 24h, and is urged toward the second base portion 24b by an elastic piece 25b provided at one end which is pressed against the first base portion 24a. Note that the slider 25 is regulated by the support post 24c so as not to protrude more than necessary inside the extension of the hole 24h. The slider 25 has a shape obtained by dividing a cylinder in the axial direction.
A conical surface 25f as a guided inclined surface that expands toward the elastic piece 25b is provided on the outer periphery.

The above-mentioned side cover 26 is provided with a circular hole in the inside thereof in which the slider 25 can be accommodated in the axial direction, and has a regular hexagonal cylinder having the same size as the first and second base portions 24a and 24b. 24a, second base portion 24
b, which is formed so as to be divided into a size that can be loaded between the columns 24c, and guides the slider 25 so as to be contracted and closed when the slider 25 is urged toward the second base portion 24b by the elastic piece 25b. Then, when the slider 25 is pushed toward the first base portion 24a against the urging force of the elastic piece 25b,
A conical surface 26f as a guide inclined surface for guiding the slider 25 so as to expand so that the male screw portion 22a can be inserted.
Are provided on the inner circumference.

The cover 27 is a regular hexagonal cylinder having the same inner shape as the outer shapes of the first and second base portions 24a and 24b and the side cover 26, and extends from the outer periphery of the first base portion 24a to the second base portion 24b. Of the slider 25 between the first base portion 24a and the second base portion 24b.
And the side cover 26 is held. Further, in the locking member 28, elastic locking pieces 28b are provided on the extension of the ring part 28a at intervals of 120 degrees inside the ring part 28a, and elastic contact pieces 28c are formed at intervals of 60 degrees outside the ring part 28a. When the shaft portion 22 is press-fitted between the elastic locking pieces 28b, the elastic locking pieces 28b are engaged with the shaft portion 22.

Next, the assembly of the joint will be described. First, the slider 25 is placed inside, the side cover 26 is positioned outside the slider 25, and the slider 25 and the side cover 26 are loaded between the first base portion 24a, the second base portion 24b, and the column 24c. Then, the slider 25 and the side cover 2 are inserted between the first base portion 24a and the second base portion 24b by press-fitting or inserting the cover 27 from the second base portion 24b side to the first base portion 24a.
When the holder 6 is held, it can be assembled as shown in FIG. When assembling in this manner, an adhesive may be applied to the outside of the column 24c, and the cover 27 may be fixed to the base 24.

Next, the attachment of the joint to the pipe will be described. First, as shown in FIG. 8, the shaft portion 22 of the joint 21 is inserted into the through hole 3a from the concave portion 3b on the right side of the pipe 1.
Is inserted and penetrated, the head 23 is located in the concave portion 3b on the right side, and the male screw portion 22a projects from the concave portion 3b on the left side. Then, as shown in FIG. 5, the male screw portion 22a is pressed into the space between the elastic locking pieces 28b to connect the locking member 28 to the pipe 1.
Can be attached to the pipe 1 so that the joint 21 does not come off.

Next, connection of a joint when connecting pipes will be described. First, as shown in FIG. 8, after arranging the pipes 1 to which the joints 21 are attached via the packing 4 as described above, the right joint 21 is pushed to the left, and the tip side of the shaft 22 is inserted into the hole 24h. Then, each of the sliders 25 moves toward the first base portion 24a while bending the elastic piece 25b, and the conical surface 25f is guided by the conical surface 26f, thereby expanding the male screw portion 22a to a state where it can be inserted. Therefore, as shown in FIG. 6A, the male screw portion 22a can be inserted between the sliders 25.

When the shaft portion 22 is rotated by rotating the head portion 23, the female screw portion 25a is screwed into the male screw portion 22a, so that the slider 25 is pulled by the pulling force of the male screw portion 22a and the urging force of the elastic piece 25b. Is
The conical surface 25f is guided by the conical surface 26f, moves to the right side, and tightly engages with the male screw portion 22a while contracting. In order to screw the male screw part 22a and the female screw part 25a in this way, the male screw part 22a is previously set to the female screw part 25a.
When the head 23 is rotated two or three times by hand, for example, as shown in FIG.
1 can be tightened. In addition, the male screw portion 22
The screwing of the female thread portion 25a with the female thread portion 25a can be released by a normal operation.

As described above, according to one embodiment of the present invention, since the male screw portion 22a can be inserted into the female screw portion 25a in advance so that it can be screwed, the head 2
3 to rotate the male screw portion 22a to 2, 3
By rotating the joints 21 one another, the joints 21 can be tightened. Therefore, if the head 23 is rotated, for example, two or three times by hand without using an electric tool or the like,
Can be connected, so that the connection work of the pipe 1 can be performed with high working efficiency.

Also, since the locking member 28 engaging with the shaft portion 22 can be attached to the pipe 1 so as not to come off, the joint 21 is set on the pipe 1 in advance, and When connecting
Is not required to be inserted into the connection hole 3 on site, so that the connection work of the pipe 1 can be performed efficiently. Furthermore, by attaching the cover 27 to the outside of the base 24, the assembly can be performed, so that the assembly can be easily performed with good operability. Since all parts except the cover 27 are made of plastic, the weight can be reduced, the handling is easy, and the operability is improved.

In the above embodiment, the connection of the pipes 1 has been described. However, it is needless to say that the present invention can also be used for connecting similar components. In addition, the example in which the slider 25 and the side cover 26 are two sets has been described, but one set or three or more sets may be used. Further, when the cover 27 is omitted, the side cover 26 may be fixed to the first and second base portions 24a and 24b and / or the column 24c. Although all parts except the cover 27 are made of plastic, if they function similarly, the cover 2
7 may be made of plastic, all may be made of metal, some may be made of metal, and the other part may be made of plastic.

[0025]

As described above, according to the present invention, the male screw portion can be inserted into the female screw portion in advance so that it can be screwed with the female screw portion. By rotating the joint device, the joint device can be tightened. Therefore, if the head is rotated by hand two or three times without using a power tool, for example, the male screw portion can be tightened to the head, so that connection work such as piping can be performed efficiently. Can be.

[0026] Further, since a locking member that engages with the shaft portion can be attached to a pipe or the like so as not to come off, a joint is set in advance on the pipe or the like to connect the pipe or the like. In this case, it is not necessary to insert the joint into a pipe or the like on site, so that the connection work of the pipe or the like can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a joint according to an embodiment of the present invention.

FIG. 2 is a sectional view of the base shown in FIG. 1 taken along line BB.

FIG. 3 is a sectional view of the slider shown in FIG. 1 taken along line CC.

FIG. 4 is a sectional view of the side cover shown in FIG. 1 taken along line D-D.

FIG. 5 is a side view in which each part shown in FIG. 1 is assembled and partly cut away.

FIG. 6 is an operation explanatory diagram.

FIG. 7 is a perspective view showing an example of a conventional joint and piping.

FIG. 8 is a cross-sectional view of a state where the pipes are connected by the joint shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping 2 Insertion hole 3 Connecting hole 3a Through hole 3b Concave part 4 Packing 11,21 Joint 12,22 Shaft part 12a, 22a Male screw part 13,23 Head 13a Female screw 24 Base 24a First base part 24b Second base part 24h Hole 24c Post 25 Slider 25a Female thread portion 25b Elastic piece 25f Conical surface 26 Side cover 26f Conical surface 27 Cover 28 Locking member 28a Ring portion 28b Elastic locking piece 28c Elastic contact piece

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tohru Sugita 184-1, Maiokacho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Nifco Co., Ltd. (72) Inventor Tsunehisa Isomura 184-1, Maiokacho, Totsuka-ku, Yokohama-shi, Kanagawa Nifco, Inc. Inside

Claims (2)

[Claims] 1. A joint in which a female screw to which a male screw portion is screwed is provided in a head portion provided on the other end side of a shaft portion having a male screw portion on one end side in an axial direction of the shaft portion. A first base portion located at the other end of the shaft portion, a second base portion provided with a hole into which the shaft portion can be inserted, and the second base portion located around an extension of the hole; A first base portion comprising a column supported to face the first base portion; and a female thread portion forming a female screw screwed into the male thread portion projects inwardly from an extension of the hole from between the columns, and the first base portion. At least one slider which is biased toward the second base portion by an elastic piece provided at one end of the slider which is pressed against the second base portion; and the slider is closed when the slider is biased toward the second base portion by the elastic piece. Guide the slider so that When the slider is pressed against the first base portion side against the biasing force of the elastic piece, the slider has a guide inclined surface that guides the slider to expand so that the male screw portion can be inserted, A joint comprising: a first base portion and at least one side cover fixed between the second base portion. 2. The joint according to claim 1, wherein the shaft portion can be press-fitted and locked, and has a locking member facing the head with the shaft portion pressed in. Features joints.