JP2001124045A - Lock washer and vertical pipe connecting structure of pipe fitting using lock washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform operations of connecting a pipe fitting with a riser pipe easily without dropping a bolt or mounting flange. SOLUTION: A mounting flange whereto a bolt 11 to be inserted from the rear surface 5c is attached provisionally, is mounted in the upper part of a lower riser pipe. To the bolt 11 penetrated by the mounting flange 5, a blot pressure contacting ring 14 formed in such a way as pressure contacting the shank 11b of the holt 11 is mounted at the flange 5 on its side with obverse surface 5b, and thereby the bolt 11 is hindered from slipping off, and a lock washer 6 is allowed to make interference at the reverse surface 5c of the mounting flange 5 so that the bolt 11 is precluded from turning together. The mounting flange 5 with all bolts 11 fastened provisionally is fastened to a pipe fitting by fastening a nut over the flange part of the pipe fitting, and connection of the pipe fitting with the lower riser pipe is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking washer formed so that a bolt or a nut can be prevented from rotating when the bolt is fastened with a nut. The present invention also relates to a pipe joint standpipe connection structure for connecting a drainage standpipe and a pipe joint installed in an apartment house or the like.

[0002]

2. Description of the Related Art In general, a flat washer formed in a disk shape, a spring washer formed in a spiral shape having a cut end at one end, and a spherical washer capable of self-centering are known. ing. However, when fastening bolts and nuts with a tool such as a spanner, if the screw parts are tightly fitted, dust is attached, if there are burrs, or if the fastening is repeated many times, Bolts and nuts often rotate together. In this case, either the bolt or the nut that does not engage with a tool such as a wrench is held down by hand and tightened. Hurt,
The work is troublesome. In particular, the work of connecting and connecting a pipe joint and a drainage pipe with a bolt and a nut in an apartment house or the like is generally performed in a place where working conditions are poor, so that it is troublesome.

In an apartment house or the like, sewage and miscellaneous drainage discharged from each floor is transported from a horizontal branch pipe to a vertical pipe, flows downward from the vertical pipe, and flows to sewage. In order to connect the horizontal branch pipes piped from each floor, the standing pipes are usually connected from the lowest floor to the top floor by fittings installed at each floor. The connection between the pipe joint and the standpipe or the horizontal branch pipe is performed by inserting the standpipe or the horizontal branch pipe into the pipe joint, and then fastening a mounting flange to be attached to the tip of the pipe to a flange portion formed in the pipe joint. What is called a flexible joint type that is performed by such a method is widespread. Also, since the horizontal branch pipe is piped so as to run on the slab of each floor, the pipe joint is arranged with the horizontal branch pipe joint port on the slab, and the pipe joint body is inserted through the opening formed in the slab. Has been placed.

In such a conventional pipe connection structure of a pipe joint in a building, as shown in FIG. 10, a pipe joint 10 having a flange 10a formed at a lower end is generally used. Has a packing 3 and a mounting flange 2
1 is temporarily mounted. Also, the flange portion 1 of the pipe joint 10
0a and mounting flange 21 are bolts 2 at several places.
2 is formed, and the flange portion 10a of the pipe joint 10 and the mounting flange 21 are fastened with the bolt 22 and the nut 23, so that the mounting flange 21 presses the packing 3 toward the pipe joint 10 side. The lower standpipe 1 and the pipe joint 10 were connected. The provisional mounting of the mounting flange 21 on the standpipe 1 can be achieved by, for example, supporting the mounting flange 21 with an outer tube portion of the fireproof double-layer pipe if the lower standpipe 1 is a fireproof two-layer pipe.

[0005] In this construction, when the pipe joint 10 is arranged at a position immediately above the slab S, generally, the worker adjusts the position of the mounting flange 21 and the flange portion 10a of the pipe joint 10, A bolt 22 is inserted from below the mounting flange 21 and the nut 23 is tightened above the flange portion 10 a of the pipe joint 10 while supporting the mounting flange 21 by hand so as not to drop.

[0006]

However, under the above-described conditions, the conventional standpipe connection structure of a pipe joint is such that the bolt 22 is inserted from below the mounting flange 21 temporarily mounted on the lower standpipe 1. Therefore, the worker must insert the bolt 22 into the bolt insertion hole 21a of the mounting flange 21 while groping. Therefore, the workability is poor, and the bolt 22 may be dropped or the mounting flange 21 may be dropped. In particular, once the mounting flange 21 inserted into the standpipe 1 is dropped below the slab S, the mounting flange 21 cannot be lifted from a downstairs position because it cannot be removed. It must be returned to its original position using a stepladder or the like while it is still passing. Further, when the nut 23 is fastened, if the bolt 22 and the threaded portion of the nut 23 are tightly engaged with each other, or if dust or the like is attached, the nut 23
And the bolt 22 rotate together, and the head of the bolt 22 located below the mounting flange 21 must be pressed by hand, resulting in poor workability. In addition, if workability is poor,
At the time of bolt tightening with more than one bolt, one-sided tightening may occur, resulting in poor connection between the pipe joint 10 and the standpipe 1.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a first object is to provide a washer capable of preventing a bolt and a nut from rotating together. A second object is to provide a washer with a bolt and a nut. The purpose of the present invention is to easily perform pipe connection work of a pipe joint by using a washer that can prevent co-rotation, and to prevent a bolt or a mounting flange from dropping at that time.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, a rotation stopper washer and a pipe connection structure of a pipe joint using the rotation stopper washer according to the present invention are configured as follows. That is, the detent washer is abutted against the seat surface of the bolt head and has a screw insertion hole, a first detent portion and a first detent portion extending in directions opposite to each other in a direction perpendicular to the washer. It is characterized in that it is formed to have two detent portions.

Preferably, in the detent washer, the washer, the first detent part and the second detent part may be formed in a flat plate shape.

[0010] In the detent washer, the washer portion, the first detent portion and the second detent portion may be formed of a linear material.

In a pipe connection structure for a pipe joint using a locking washer, a flange portion is formed at one end of the pipe joint, and the flange portion and a mounting flange mounted on a standpipe are fastened by fastening means. Thus, in a pipe connecting structure of a pipe joint using a detent washer that connects the pipe joint and the stand pipe, the fastening means includes a bolt inserted from the back side of the mounting flange, A nut disposed on the flange portion side, wherein the bolt is formed having a head portion and a shaft portion, and is temporarily fixed to the mounting flange via a retaining prevention means, On the back surface of the flange, between the bolt inserted into the mounting flange and the mounting flange, a detent washer for restricting rotation of the head of the bolt is provided, and the detent washer is provided on the head of the bolt. seat And a first detent portion and a second detent portion extending in opposite directions to each other in a direction perpendicular to the washer and abutting on the portion. It is characterized by that.

[0012] Preferably, in the pipe connection structure of a pipe joint, the stopper preventing means is a bolt pressure ring for pressing a shaft portion of the bolt on a front surface side of the mounting flange. Anything should do.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The detent washer 6 of the present invention
As shown in FIG. 1, a washer portion 61 having a bolt insertion hole 61 a, and integrally connected to the washer portion 61 on both sides of the washer portion 61 so as to extend in opposite directions so as to be orthogonal to the washer portion 61. The first detent part 63 and the second detent part 6 to be arranged
5 is formed. First detent part 63 and second
One of the detent portions 65 is detented by abutting against the side surface of the object to be mounted, and the other detent is detented by the head of the bolt.

The washer portion 61 has a first contact surface 61b that contacts the seat surface of the bolt head and a second contact surface 61 that contacts the object to be mounted.
c and are formed in a flat plate shape. The outer peripheral surface of the washer portion 61 may be formed in an arc shape as shown in FIG. 1 at a portion not connected to the first detent portion 63 and the second detent portion 65, and FIGS. It may be formed linearly as shown in FIG. The distance between one of the second detent portion 65 or the first detent portion 63 for locking the head of the bolt and the center position of the bolt insertion hole 61a is determined by the rotation of the bolt and the contact with the head of the bolt. The dimensions are set so that they can be touched. For example, when a hexagonal bolt is used, as shown in FIG. 2A, a second detent portion 65 or a first detent portion 63 is formed at a position where the head apex of the hexagonal bolt abuts to form a T-shape. In the case of using the set T bolt, as shown in FIG.
Alternatively, the first detent portion 63 is formed at a position approaching the bolt insertion hole 61a.

When a T-bolt is used for the detent washer having the shape shown in FIG. 1, the washer is formed so that the first detent part 63 and the second detent part 65 become narrow as shown in FIG. It is desirable to form the portion 61.

Further, as shown in FIGS. 4A and 4B, the first detent portion 63 and the second detent portion 65 are
It may be arranged to extend in the opposite direction in the ° direction.

The first detent portion 63 is formed in a rectangular shape as shown in FIG. 1, and has an abutment surface 63a on the inner side surface (the washer portion 61 side) which can abut the side surface of the attached portion. The tip of the first detent portion 63 may be formed in an arc shape as shown in FIG. The second detent portion 65 is also formed in a rectangular shape like the first detent portion 63, and has a contact surface 65a on the inner surface that contacts the contact portion of the head of the bolt. When the bolt is a T-bolt, the contact surface 6 of the second anti-rotation portion 65
5c is formed not at the inner surface of the second detent portion 65 but at the corner with the side surface. Then, as shown in FIG. 5, the tip may be formed in an arc shape.

First detent part 63 and second detent part 65
As long as the distance from the center of the bolt insertion hole 61a is formed to be approximately the same size, the bolt can be used even if the front is reversed.

The rotation stopper washer 7 shown in FIG. 6 shows another embodiment, and is formed of a linear material. In order to form the washer portion 71, the first detent portion 73, and the second detent portion 75, each of the detent washers 7 is juxtaposed with two linear materials while bending one linear material. It is constituted by doing. That is, one linear member extending linearly from the lower end of the first rotation stopper 73 to the washer 71 is
To form a semicircular portion 71b in order to form a bolt insertion hole 71a, and form a semicircular portion 71b.
And is extended in the opposite direction to the tip of the second detent part 75. When the linear material that has reached the tip of the second detent portion 75 is folded back and extended to the washer portion 71, it is formed of two linear materials in which the second detent portions 75 are juxtaposed, and the second detent portion 75 is formed. The semicircular portion 7 folded back from the stop portion 75
When the semicircular portion 71c is formed by bending toward the side opposite to the side 1b, the washer portion 71 is formed by two linear members into the bolt insertion holes 71a.
Is formed. Furthermore, when it is folded back from the washer 71 so as to be orthogonal, the first detent part 73 is formed so as to be juxtaposed with two linear members.

The detent washer 6 formed as described above.
(Or 7) can be attached to a mounting flange 5 used to connect a pipe joint to a standpipe, for example, as shown in FIG. As shown in FIGS. 7 and 8, the mounting flange 5 has a plurality of (three in this embodiment) protrusions 5 in the plane direction.
a, and is formed in a substantially annular shape, and a bolt insertion hole 5b is formed in each projection 5a. This mounting flange 5 has a bolt 1
By temporarily mounting the pipe 1 so as to prevent the pipe 1 from falling off, for example, when the standpipe 1 is connected to the pipe joint 10 as shown in FIG.

As shown in FIG. 8, the bolts 11 inserted into the three locations are temporarily mounted on the mounting flange 5 from the back 5c side of the mounting flange 5 by the locking washer 6 as shown in FIG.
(Or 7) Shaft 11b of bolt 11 inserted through
Then, a bolt pressure contact ring 14 is attached on the front face 5d side of the attachment flange 5. The first contact surface 61b of the washer 61 is arranged to face the seat surface 11c of the head 11a of the bolt 11, and the second contact surface 61c is arranged to face the member to be mounted. The first detent portion 63 of the detent washer 6 has its contact surface 63a abutting against the side surface portion 5e of the mounting flange 5 to be detented against the mounting flange 5, and the second detent portion 65 is The contact surface 65a is arranged so as to be able to contact the head 11a of the bolt 11 when the bolt 11 rotates.

The bolt pressure contact ring 14 used here is generally called a push nut, is formed in a thin disk shape, and has a hole formed in a central portion through which a shaft portion 11b of the bolt 11 is inserted. I have. The diameter of the hole is formed smaller than the shaft of the bolt 11, and a plurality of cuts are formed in the radial direction. When the bolt pressure contact ring 14 is inserted into the bolt 11, the bolt pressure contact ring 14 is bent so that the inner edge portion of the bolt pressure contact ring 14 is flexible and closely adheres along the shaft portion 11 b of the bolt 11. This allows all bolts 1
1 is temporarily fixed to the mounting flange 5.

The back surface of the mounting flange 5 described here refers to the mounting flange 5 when the mounting flange 5 is temporarily mounted on the standpipe 1 and connected to the pipe joint 10 in FIG.
The front surface refers to the upper surface of the mounting flange 5, that is, the surface facing the flange surface 10a of the pipe joint 10.

It is desirable that the bolt 11 temporarily fixed to the mounting flange 5 has play in the bolt insertion hole 5b formed in the flange portion 10a of the pipe joint 10 when the bolt 11 is fastened to the pipe joint 10. For this purpose, it is preferable that the bolt pressure contact ring 14 is temporarily attached to the bolt 11 so that there is a gap between the head 11a of the bolt 11 and the lower surface of the mounting flange 5. Thus, the bolt 11 can be slightly moved with respect to the bolt insertion hole 5b of the mounting flange 5 without being fixed to the mounting flange 5.

Next, all the bolts 11 are fixed to the rotation stopper washers 6.
9 using the mounting flange 5 temporarily mounted through
The structure for connecting the pipe joint 10 and the standpipe 1 as shown in FIG.

In this structure, before connecting the pipe joint 10 and the lower standpipe 1, the packing 3 and the mounting flange 5 are attached to the tip of the lower standpipe 1 installed through the opening SA of the slab S. And are temporarily attached.

Above the lower standpipe 1, a pipe joint 10 is temporarily disposed by being inserted into the tip of the lower standpipe 1. Each fitting 5 a of the mounting flange 5 is provided on the pipe joint 10.
A flange portion 10a having a convex portion 10b is formed at a position facing each other, and a bolt 11 for arranging a head portion 11a on the back surface 5c side of the mounting flange 5 is connected to a pipe joint 10
The nut 12 can be used to fasten the shaft 11b of the bolt 11 above the flange 10a. At this time, all bolts 11 are temporarily fixed to the mounting flange 5 so as not to come off from the mounting flange 5.

As the bolt 11 of this embodiment shown in FIG. 8, a T-bolt having a long head 11a is used, and when the nut 12 is tightened, the head 11a of the T-bolt 11 is prevented from rotating. 6 to restrict the rotation of the T-bolt 11 by contacting the second rotation stopper 65.

It should be noted that a general hexagon nut may be used in place of the bolt press ring 14 described above. in this case,
Since the hexagon nut is disposed between the mounting flange 5 and the flange portion 10a of the pipe joint 10, it is desirable that the head has a thin thickness. Then, the bolt 11 is temporarily fixed.

Further, the bolt 11 needs to have a contact surface on the head 11a for contacting the second detent portion 65 of the detent washer 6, so that the head 11a is formed in an irregular shape. It may be formed eccentrically with respect to the shaft portion 11b. For example, a general hexagon bolt may be used instead of the T bolt as shown in FIG.

As described above, the mounting flange 5 to which all (three in the present embodiment) bolts 11 are temporarily fastened is pressed upward while pressing the packing 3 upward along the lower standpipe 1. When the bolts 11 are moved, the tips of the bolts 11 are simultaneously projected above the flange 10a. And
A nut 12 is engaged with the tip of each bolt 11 and tightened. Since the three bolts 11 are temporarily fixed to the mounting flange 5 by the bolt pressure ring 14, the nuts 12 can be securely tightened without fear of falling off. Moreover, the mounting flange 5 does not drop.

Further, on the back surface 5c of the mounting flange 5, a detent washer 6 (or 7) for restricting rotation of the bolt 11 is disposed near the head 11a of each bolt 11, so that the bolt 11 and the nut 12 Can perform easy work without rotating around. Moreover, since the three bolts 11 project upward from the flange portion 10a of the pipe joint 10 at the same time, the nuts 12 can be engaged with the respective bolts 11 in advance, and the nuts 12 can be sequentially tightened. Hard to wake up.

[0033]

As described above, the detent washer of the present invention has a washer having a screw insertion hole, and a first detent and a second detent extending in opposite directions. Is formed. When the bolt or the nut is fastened, when the head or the nut of the bolt rotates by co-rotation, the head or the nut of the bolt comes into contact with the first detent portion or the second detent portion, thereby restricting the rotation. Therefore, the bolt or the nut can be easily fastened. Further, since the first detent portion and the second detent portion of the detent washer extend in opposite directions to each other, one of the detent portions is formed as a detent for a bolt or a nut. The other detent portion is formed so as to be able to abut the member to be mounted. Therefore, when the bolt or the nut rotates, the rotation-stop washer can prevent co-rotation with the bolt or the nut.

The above-described effect can be exerted whether the detent washer is formed in a flat plate shape or a linear material.

In the pipe connecting structure for a pipe joint according to the present invention, when the mounting flange mounted on the standing pipe and the flange part of the pipe joint are fastened, the bolt is projected upward from the shaft of the bolt. And temporarily fastened to the mounting flange via a retaining means, and fastened to the flange portion of the pipe joint. Therefore, when connecting the pipe joint and the standpipe, the nut can be tightened without manually pressing the bolt on the back side of the mounting flange as in the conventional case, so that the connection work can be easily performed and the bolt can be easily connected. Is not dropped from the mounting flange. In addition, since the mounting flange can be supported by hand, the mounting flange does not drop.

Further, since the mounting flange is provided with a detent washer between the mounting flange and the bolt, when the bolt is tightened with a nut, the head of the bolt has a detent seat. In order to prevent the bolts from rotating together by abutting against the locking portions of the springs, the fastening operation can be performed extremely easily.

Further, in the pipe connecting structure for a pipe joint according to the present invention, the bolt inserted on the front side of the mounting flange is pressed against a bolt inserted from the back side of the mounting flange, so that the bolt is mounted on the mounting flange. Is temporarily stopped.
Therefore, since a plurality of bolts can be simultaneously inserted into the flange portion of the pipe joint, not only the same effect as the above-described effect in the pipe connection structure of the pipe joint can be exhibited, but also a plurality of nuts can be sequentially tightened, and one-sided tightening can be performed. Never wake up.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rotation washer according to one embodiment of the present invention.

FIG. 2 is a perspective view showing another form of a rotation stopper washer.

FIG. 3 is a partial perspective view showing another embodiment of the rotation stopper of the rotation stopper washer in FIG. 1;

FIG. 4 is a partial perspective view showing another embodiment of the rotation stopper of the rotation stopper washer in FIG. 1;

FIG. 5 is a perspective view showing still another form of the rotation stopper washer.

FIG. 6 is a perspective view showing still another form of the rotation stopper washer.

FIG. 7 is a partial cross-sectional view showing a form in which a bolt is temporarily mounted on a mounting flange using the rotation stopper washer in FIG. 1;

8 is a sectional view taken along line VI-VI in FIG.

FIG. 9 is a simplified partial cross-sectional view showing a standing pipe connection structure of a pipe joint according to an embodiment of the present invention.

FIG. 10 is a simplified partial cross-sectional view showing a conventional pipe connection structure of a pipe joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lower standing pipe 5 ... Mounting flange 5c ... Back surface 5d ... Front surface 6, 7 ... Detent washer 61, 71 ... Washer part 61a, 71a ... Bolt insertion hole 63, 73 ... First detent part 65, 75 ... Second detent part 10 ... Piping joint 10a ... Flange part 11 ... Bolt 11a ... Head 11b ... Shaft part 12 ... Nut 14 ... Bolt pressure ring

Claims (5)

[Claims] 1. A washer portion which is in contact with a seat surface portion of a bolt head and has a screw insertion hole, a first detent portion extending in a direction orthogonal to the washer portion and a second anti-rotation portion.
A rotation stopper washer formed having a rotation stopper portion. 2. The washer according to claim 1, wherein the washer, the first detent and the second detent are formed in a flat plate shape. 3. The washer according to claim 1, wherein the washer, the first detent part and the second detent part are formed of a linear material. 4. A flange portion is formed at one end of the pipe joint,
The flange portion, a mounting flange to be mounted on the standing pipe,
By using a locking washer for connecting the pipe joint and the standpipe by fastening with a fastening means, wherein the fastening means is a bolt inserted from the back side of the mounting flange. And a nut provided on the flange portion side of the pipe joint, wherein the bolt is formed having a head and a shaft portion, and is provided on the mounting flange via a retaining prevention means. A temporary stop washer is provided on a rear surface of the mounting flange, between the bolt inserted into the mounting flange and the mounting flange, and a rotation stopper washer for restricting rotation of a head of the bolt is provided. Is abutting against the seat surface of the bolt head and is provided with a screw insertion hole, and a first anti-rotation portion and a second anti-rotation portion extending in directions opposite to each other in a direction orthogonal to the washer. Having formed A standpipe connection structure for a pipe joint using a detent washer, characterized in that: 5. The locking stopper washer according to claim 4, wherein said retaining preventing means is a bolt pressure contact ring for pressing a shaft portion of said bolt on a front surface side of said mounting flange. Pipe connection structure for pipe fittings.