JPH0252156B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used when connecting pipes for underground burial in a state where stretchability and flexibility within a predetermined range are ensured. The present invention relates to a pipe joint, and particularly to a connecting member for preventing a large number of members constituting the pipe joint from losing their cohesiveness during pipe connection work.

[Connection member related to prior art and prior invention]

A set of pipe joint devices used to connect both one pipe and the other pipe includes a plurality of holding fittings that are respectively attached to both pipes, and a plurality of connecting rods that connect the holding fittings of both pipes. It is destined to be composed of a large number of members, such as tightening bolts and nuts for integrally assembling a plurality of holding fittings and connecting rods to both pipes.

When performing pipe connection work, first disassemble a set of pipe joint devices in which many of the above-mentioned members are prepared all at once, install each member in the specified position on both pipes in order, and finally This is done by tightening bolts and nuts. Therefore, a large number of man-hours are required to connect a single connection portion. When water pipes and the like are buried underground over a wide area, the number of pipe connections is enormous. Moreover, the pipe connection site for underground pipelines is usually in a hole that has been drilled to the extent that the lower half of the worker's body can barely fit through, making the work extremely difficult. Moreover, among the disassembled parts, especially bolts and nuts, are easily lost in the excavated earth and sand, and parts are often lost during connection work, resulting in wasted time searching for them.

In order to solve the above-mentioned problems, the structure of the pipe joint measurement system should be modified to one that allows connection work by disassembling only one or two unavoidable parts, and parts that do not require disassembly should be modified. It is a good idea to make workers naturally aware of this fact. Based on this idea, the inventor
We have developed a "connecting member for connecting rods and tightening bolts for pipe joints" and have already developed Utility Application No. 59-151521 (Utility Application No.
No. 66291) has been filed. This is called a first-to-file idea.

The connecting member according to the prior application is as shown in FIG. 9 when viewed from perspective. Connecting member 60 in the same figure
At first, a band-shaped binding part 61 is in an expanded state as shown by the broken line, and cylindrical fitting parts 62, 62 are integrally provided at both ends of the binding part 61, which are perpendicular to the belt-shaped plane. ing. When using the connecting member 60, the binding portion 61 is bent in the direction of the white arrow to form a U-shape as shown by the solid line, and the fitting portions 62, 62 are bent.
Transform it so that it is located on one axis. As can be seen from this, the connecting member 60 is made of a deformable soft elastic material, such as a rubber material or a resin material. As shown in FIGS. 11 and 12, the shaft portion of the connecting rod 6 is inserted into the U-shaped space 64 formed by bending the binding portion 61, and is positioned uniaxially. A tightening bolt 7 is inserted into the insertion holes 63, 63 of the fitting portions 62, 62.

FIG. 10 shows a connecting member 60 according to the invention of the earlier application.
FIG. 2 is a perspective view of an improved pipe joint device 10 equipped with the above. In the figure, reference numerals 3a and 4a are half-shaped holding fittings, and a connecting member 60 is placed on the flange portions 5, 5, . . . provided on both sides of the holding fittings 3a, 4a. in a state. Each bolt 7, 7... inserted into the fitting part 62, 62,... of each connecting member 60
... is further inserted into the flange portions 5, 5, ...,
Nuts 8, 8, . . . are screwed together. In this state, the connecting rods 6, 6 inserted into the U-shaped spaces 64, 64... are installed across the holding fittings 3a, 4a. In this way, the holding fitting 3
a, 4a, connecting rods 6, 6 and tightening bolts 7,
7 maintains the unity of an inseparable unit through each connecting member 60, 60, . . . . Each bolt 7, 7,
If the tips of the threaded portions are caulked after the corresponding nuts 8, 8 are screwed together, the integrity of the entire pipe joint device 10 will be more secure. However, only the other holding fittings 3b and 4b, which correspond to the holding fittings 3a and 4a, are in a disassembled state. This is because the pipe joint device 10 shown in FIG. 10 is in a state of preparation for performing pipe connection work on both pipes to be connected. Due to this, the holding fittings 3a,
3b, 4a, 4b, bolts 7, 7, . . . and nuts 8, 8, . Note that the through holes 5b, 5b, . . . provided in the flange portions 5, 5, .
This is the modified part made to b and 4b.

The first connecting member 60 according to the invention of the earlier application is attached.
To attach the pipe joint device 10 shown in Figure 0 to both water pipes to be connected, first apply the holding fitting 3a to the pipe end on the insertion port side from below, and then attach the holding fitting 4a to the other fitting fitting 4a.
Apply it from below to the end of the tube on the socket side. And the heads 7a, 7a... of each tightening bolt 7, 7,...
Apply a biasing force in the direction of the white arrow to open it,
The unassembled holding fittings 3b and 4b are aligned and placed on the holding fittings 3a and 4a. Next, if the urging force applied to the heads 7a, 7a of the bolts 7, 7, . . . is released, the bolts 7, 7, . It returns to its original position due to its elasticity. At this time, bolts 7, 7,...
... represents each flange portion 5 of the holding fittings 3b, 4b,
5, slit-like through holes 5b, 5b bored in...
Get inside. Thereafter, tighten the nuts 8, 8, . . . to the extent that the heads 7a, 7a of the bolts 7, 7, .
After loosely and temporarily tightening the holding fittings 3a, 3a,
and 4b, 4b are reversed vertically. By finally tightening the nuts 8, 8, . Meanwhile, tighten the nuts 8, 8, ... by the bolt 7,
There is no need to unthread the fittings from 7, . Therefore, the constituent members of the pipe joint device 10 may get lost in the excavated earth and sand, or
There is no dissipation, and work efficiency is greatly improved.

[Problem that the invention seeks to solve]

However, as can be seen from FIG. 11, the connecting member 60 according to the prior application cannot be tied to the connecting rod 6 without the help of the tightening bolt 7, and the tied state Be sure to use bolt 7 to maintain
must be inserted into the fitting parts 62, 62. Moreover, since the band-shaped binding part 61 has elasticity, even if it is deformed into a U-shape, it always tries to return to the expanded state, and the fitting parts 62, 62 tend to separate. Therefore, when inserting a tightening bolt into the insertion holes 63, 63 of the connecting member 60, as shown in FIG.
62 gets caught on the bolt 7, making it impossible to insert it smoothly, and the combination for ensuring the integrity of the pipe joint device 10 cannot be performed efficiently. Furthermore, even if the U-shape is maintained with the help of the bolt 7, the gap between the fitting parts 62, 62 will not be closed, so earth and sand will not enter through the gap when buried underground. Therefore, there was a drawback that the threaded portions of the tightening bolts 7, 7 were damaged. The present invention aims to solve the above problems.

[Means to solve the problem]

The means adopted by the present invention to solve the above-mentioned problems include a split arc-shaped holding fitting that is attached near the connecting part of both pipes connected in series, and ensuring that the permissible expansion and contraction distance of the connecting part is within a predetermined range. a connecting rod, and a tightening bolt and nut for tightening the holding fitting to the pipe and clamping the connecting rod to the shaft portion, and opposing opposing bolts provided on both sides of the arc-shaped holding fitting. The flange portion is provided with a through hole through which the tightening bolt is inserted, and the shaft portion of the connecting rod is inserted between the opposing flange portions at the tip of each flange portion when the holding fitting is tightened. A connecting member attached to the clamping space in a pipe joint device provided with a protruding piece that forms a space, the connecting member comprising a band-shaped binding part and a fitting located at one end of the binding part. The binding part is integrally formed of a soft elastic material such as a rubber material or a resin material, the binding part is bound to the shaft part of the connecting rod, and the fitting part is inserted into the through hole. A tightening bolt is fitted, and the other end of the binding part and the fitting part are adapted to be male-female fitted.

[Effect]

It is clear from the name and descriptive description of the present invention that the central feature of the means adopted in the present invention is the connecting member that connects the connecting rod and the tightening bolt. .

The connecting member maintains a closed ring shape without the aid of other members by male-female fitting between the other end of the binding portion and the fitting portion, and the fitting portion is connected to the male-female fitting. It is extremely easy to insert the tightening bolt into the hole.
Therefore, when the pipe joint device is shipped from a factory, it is possible to contribute to improving the efficiency of the work of assembling various constituent members in a unified manner.

Moreover, in the connecting member, the binding part binds the shaft part of the connecting rod and is in an inseparable state, and the fitting part is fitted into the tightening bolt and is also in an inseparable state, The tightening bolt is inserted into the flange portion of the holding fitting via the fitting portion, and is held in a state where it does not fall off due to irregularities. In such a state, even if one of the metal segments constituting the holding fitting is detached from the tightening bolt, the overall integrity of the pipe joint device will not be lost. Therefore, workers who handle pipe joint devices will realize that there is no need to disassemble all the constituent parts in the preparation stage of pipe connection work, which not only contributes to a reduction in work man-hours and work time, but also reduces the number of parts during work. There is no risk of losing components.

In addition, the binding portion of the connecting member that is tied to the shaft portion of the connecting rod has soft elasticity that allows the pipe to secure the clamping space formed between the opposing flange portions. It ensures that bending and expansion/contraction phenomena occur in a natural manner at the joints, and prevents dirt, etc. from entering the clamping space, thereby preventing the movement of the connecting rod within a predetermined range. Not at all. Furthermore, the fitting part of the connecting member into which the tightening bolt is fitted is a cylindrical body with no missing parts, so even if it is buried underground for a long time, the threaded part of the tightening bolt will not be damaged by erosion by earth and sand. prevent from

〔Example〕

1 and 2 show a connecting member 70 according to a first embodiment, of which FIG. 1 is a perspective view and FIG. 2 is a partially sectional front view. The connecting member 70 is made of a deformable soft elastic material, such as a rubber material or a resin material, and has a fitting part 71 into which a bolt is fitted, and a binding part 74 which binds a connecting rod, which are integrally formed. The fitting part 71 is
In appearance, it is a hollow cylindrical body having a short columnar or prismatic shape (the drawing shows a prismatic shape), and a male fitting portion 78 is provided protruding from the upper end of the fitting portion 71 .
The fitting male part 78 has an annular flange 73a and the flange 73.
It has a neck portion 73b having a smaller diameter than that of the thread a.
An insertion hole 72 into which a tightening bolt is inserted is provided along the axis of the fitting portion 71 and the male fitting portion 78 . A band-shaped binding part 74 for binding the connecting rod is extended on the side of the lower end of the fitting part 71. The binding portion 74 is provided with notch recesses 76, 76 so as to divide its length into three sections, and a fitting female portion 75 is provided on the distal end side of the binding portion 74. The inner diameter of the female fitting portion 75 is approximately the same as the outer diameter of the neck portion 73b of the male fitting portion 78. Initially, the binding portion 74 is unfolded as shown by the two-dot chain line, but it is bent in the direction of the outlined arrow, and the female fitting portion 75 and the male fitting portion 78 are fitted. Then, the binding portion 74 is bent at the concave portions 76, 76, and the connecting member 70 becomes a closed-circle-shaped closed ring, forming a closed-circuit space 79 for surrounding the shaft portion of the connecting rod. Of course, the fitting relationship between the female fitting part 75 and the male fitting part 78 can be released by expanding the inner diameter of the female fitting part 75. At that time, the binding portion 74 returns to its original expanded state.

FIG. 3 shows a connecting member 80 according to a second embodiment, and is a partially sectional front view. The second embodiment differs from the first embodiment in that the female fitting part 75 is formed thicker and a snap method is used for fitting with the male fitting part 78. Other aspects are substantially the same as the connecting member 70 of the first embodiment.

FIG. 4 is a perspective view of the pipe joint device 15 equipped with the connecting member 70 according to the first embodiment of the present invention in a preparation stage prior to pipe connection work.
The pipe joint device 15 includes holding fittings 16 and 17 and a connecting rod 2 stretched between the holding fittings 16 and 17.
2, 22, tightening bolts 57, 57, etc. The holding fitting 16 has a corresponding half fitting 1
6a, 16b, each half metal fitting 16a, 16
Flange portions 18, 18, . . . are formed at both ends of b. To attach the connecting members 70, 70 to the pipe joint device 15, first, the head stopper 23 and the intermediate stopper 2 of the shaft portions of the connecting rods 22, 22 are attached.
3a, the connecting members 70, 70 are tied to the intermediate part,
The flange portions 18, 18 of the half-split fitting 16a are left as they are.
Place it on top. And the tightening bolts 57, 57
The fitting parts 71, 71 in the connecting members 70, 70
, and screw the nuts 8, 8 into the threaded portions of the tightening bolts 57, 57 appearing below the flange portions 18, 18. After that, Natsuto 8,8
Tighten bolts 57, 5 to prevent them from falling off.
The tip of the screw part 7 shall be caulked. When the connecting members 70, 70 are tied to the connecting rods 22, 22, the male fitting portions 78 and female fitting portions 75 of the connecting members 70, 70 are tightly fitted, and the binding is prevented. The fitting part 74 never opens. Therefore, the insertion of the tightening bolts 57, 57 is extremely smooth.
Assembling work for uniformly organizing the constituent members of the pipe joint device 15 can be performed quickly and easily.

Incidentally, protrusions 19, 19, . . . that protrude toward the other opposing flange portion 18 are formed at the tip of each flange portion 18 of the half fittings 16a, 16b. The amount of protrusion of the protrusions 19, 19, . . . is such that the connecting rod 22 can move appropriately in the vertical direction even when the opposing protrusions 19, 19 are in contact with each other in the connection completion state described later. It has reached a certain degree. This is to ensure that both connected tubes have room to bend in the radial direction. A tightening bolt 5 is attached to the flange portion 18 of the half fitting 16a on one side.
7 and 57 (in FIG. 4, it is not visible due to the attachment of the connecting member 70). As described above, the connecting members 70, 70, which connect the connecting rods 22, 22 and the tightening bolts 57, 57 together, are attached to the flange parts 18, 18.
is installed. On the other hand, elongated holes 51, 51 through which bolt heads 57a, 57a of the tightening bolts 57, 57 can be freely inserted are bored in the radial direction in the flange portions 18, 18 of the half fittings 16b.
Locking stand 2 for locking bolt heads 57a, 57a
1 and 21 are formed, and the locking bases 21 and 21 have concave seating portions 21 in a direction perpendicular to the elongated holes 51 and 51.
a, 21a are formed. In addition, half metal fitting 1
The arcuate inner surfaces of the fittings 6a and 16b are preferably roughened by leaving the cast surface as is or by being machined to prevent slipping when the holding fitting 16 is held onto a water pipe.

The holding fitting 17 also has a corresponding half fitting 17a,
17b, and flanges 32 in a direction perpendicular to the tube axis direction are provided at both ends of each half fitting 17a, 17b.
32, 33, and 33 are formed into plate shapes. Since one connecting rod 22 is inserted through each flange 32 and 33 during the pipe connecting operation,
It has the same shape as when the thickness of a plate is cut in half lengthwise,
Opposing surfaces are opposing surfaces 34 and 35.
Therefore, shoulders 40, 40 are formed at the flanged base portions of the half fittings 17a, 17b. In forming the mating surfaces 34, 34, locking pieces 44, 44 and protruding pieces 46, 46 are cut out from the parts of the half fitting 17a around the flanges 32, 32. In addition, through holes 36, 36 are formed in the center portions of the flanges 32, 32, through which the threaded portions 38, 38 of the connecting rods 22, 22 pass.
On the other hand, notches 45, 45 for forming mating surfaces 35, 35 are formed in part of the periphery of the flanges 33, 33 of the half fitting 17b. Also,
One of the flanges 33, 33 is provided with a central through hole 36 and a peripheral recess 37, and the other is provided with an interrupt hole 37a in which the through hole and the recess are continuous.
is provided. The half-split fitting 17b is placed in an open state during the preparation stage. In addition, the connecting rods 22, 2
2, 23b, 23b are screw stoppers, which are integrally formed with the connecting rods 22, 22. And the screw part stopper 23b, 23
Attached to b are elastic rings 58, 58, and nuts 39, 39 are screwed into the threaded portions 38, 38. After screwing the nuts 39, 39 into the threaded parts 38, 38, if the tips of the threaded parts 38, 38 are caulked, the nuts 39, 39 are of course already attached to the connecting rods 22, 22. The half fittings 17a, 17b can also be prevented from falling off thereafter.

The procedure for attaching the pipe joint device 15 shown in FIG. 4 to both water pipes to be connected and performing the connection work will be described. First, one half metal fitting 1
6a is applied from below to the tube end on the insertion side, and the other half fitting 17a is applied from below to the tube end on the socket side. Then, the half-split fitting 16b is attached to the half-split fitting 16b.
a and lower it directly to insert the bolt heads 57a, 57a of the tightening bolts 57, 57 into the long holes 51, 51, and then insert the flanges 18, 18 into the mating half metal fittings 16b. flange parts 18, 18
The connecting members 70, 70 attached to the In this state, the bolt heads 57a, 5
7a has come out to the upper part of the locking bases 21, 21.
Therefore, the bolt heads 57a, 57a are rotated 90 degrees, and then the tightening nuts 8, 8 are temporarily tightened to tighten the bolt heads 57a, 57a to the concave seating portions 21a, 21.
Bring it into contact with a. Next, the half fitting 17b, which had been in the open state until then, is rotated in the closing direction, and the connecting rod 22 is fitted into the cut-in hole 37a. Next, attach the half fitting 17a to the mating surface 3 of the flanges 32, 32.
4 and 34 are flanges 33 and 3 on the side of the half metal fitting 17b
Push it toward the end of the tube on the socket side until it comes into contact with the mating surfaces 35, 35 of No.3. Then, the flange 32,
The locking pieces 44, 44 and the protruding pieces 46, 46 formed around the flange 32, the notches 45, 45 on the side of the flanges 33, 33, the recess 37 and the cut-in hole 3
7a, respectively. In this state Natsuto 3
9, 39 are temporarily tightened, the flanges 33, 33 of the half metal fitting 17b will close to the threaded portion stoppers 23b, 23.
It collides with the elastic rings 58, 58 backed up at b, and the flange portions 3 of the half fittings 17a, 17b
2, 32 The mutually engaged state does not separate,
Furthermore, the half fitting 17b cannot be opened. The holding fitting 17 comes into contact with the large diameter portion of the outlet-side pipe end of the water pipe, and the curved inner surface of the holding fitting 17 contacts the outer circumferential surface of the main body of the water pipe. In this state, the holding fittings 16a, 17a and 16a, 17b are reversed vertically, and are screwed into the upwardly angled tightening nuts 8, 8 and the threaded portions 38, 38 of the connecting rods 22, 22. Finally tighten nuts 39 and 39. This completes the connection work of the pipe connections. During this time, the tightening bolts 57, 57, the tightening nuts 8, 8, the connecting rods 22, 22, and the nuts 39, 3
No. 9 is never unscrewed from beginning to end, and there is no need to do so. Pipe joint device 1 attached to water pipe
If it is necessary to remove the part 5, it can be done in the reverse order of the above-mentioned work procedure. In this case as well, there is no need to separate the tightening bolts 57, 57 and the tightening nuts 8, 8, and the connecting rods 22, 22 and nuts 39, 39.

A perspective view of the pipe connection section when the connection work is completed is as shown in FIG.
8 and the flanges 32 and 33 of the holding fitting 17 are shown in FIG.
A half cross-section in a direction perpendicular to the tube axis at the position of the holding fitting 16 is shown in FIG. 7, and an enlarged perspective view of the flange portions 18, 18 of the holding fitting 16 is shown in FIG. be. In these figures,
1 is the water pipe on the inlet side, 2 is the water pipe on the socket side, 31 is the large diameter part of the water pipe 2 on the socket side that the holding fitting 17 comes into contact with, and 12 is the water pipe on the water pipe 1. This is a gasket interposed between the outer circumferential surface of the insertion port and the inner circumferential surface of the socket of the water pipe 2. The following can be seen from the above FIGS. 6, 7, and 8. That is, the tightening bolt 5
The bolt head 57a of No. 7 is fitted into the concave seating portion 21a formed on the locking base 21 of the half-split fitting 16b to prevent its rotation, and at the same time, the position of the tightening bolt 57 is determined. In addition, the connecting rod 22 has a portion near the head stopper 23 facing the flange portion 1.
8 and 18 and the protrusions 19 and 19, and is surrounded by a connecting member 70 according to the first embodiment of the present invention. be. Since the connecting member 70 is made of a soft elastic material, the connecting rod 22 can move appropriately in the radial direction of the tube and in the axial direction of the tightening bolt 57. The connecting member 70 prevents earth and sand from entering the clamping space 24 even after the connecting portions of the water pipes 1 and 2 are buried underground, and ensures the movement of the connecting rod 22. Guarantee. Securing this movement is necessary in order to absorb the deflection when the water pipes 1 and 2 are deflected in the radial direction at the connection portion. Thereby, the water pipes 1 and 2 can freely bend in the radial direction within the range of the gap 13 shown in FIG. In addition, the shaft of the tightening bolt 57 and the connecting rod 2
The shaft portion of No. 2 refers to the fitting portion 71 of the connecting member 70.
Because they are indirectly adjacent to each other via (hollow cylindrical body),
They do not directly rub against each other, and the threaded portions are not damaged. In addition, if the water pipes 1 and 2 buried underground are subjected to axial expansion and contraction force due to changes in the land, the holding fitting 16 that is tightened and fixed to the water pipe 1 is attached to the connecting rod. It moves between the head stopper 23 at 22 and the intermediate stopper 23a.
In other words, the expansion and contraction of the water pipes 1 and 2 is guaranteed. If there is a request to change the allowable amount of expansion/contraction, the distance between the head stopper 23 and the intermediate stopper 23a may be adjusted to match the required dimensions.
You can exchange it with .

The above describes the pipe joint device 15 to which the connecting member 70 according to the first embodiment is attached, but the second embodiment
Since there is no particular change in the case of the pipe joint device equipped with the connecting member 80 according to the embodiment, the explanation thereof will be omitted here. Further, the connecting rod used with the connecting member of the present invention may have a prismatic cross section, a round rod shape, or any other shape.
Furthermore, the bolts for tightening the holding fittings and clamping the connecting rods may or may not be T-shaped. Similarly, the holding fittings need not be limited to halves, and may be divided into three or four parts.

〔Effect of the invention〕

As explained above, the effects of using the connecting member according to the present invention in a pipe joint device are listed below, divided into the manufacturing of the pipe joint device, the time of pipe connection work, and the time of underground burying. .

(Effects during manufacture of pipe joint device) A connecting member in which a binding part and a fitting part are integrally formed using a soft elastic material such as a rubber material or a resin material can be connected to the end of the binding part and fitting. Since the male and female parts are mated together, it is extremely easy to maintain the closed ring shape without the help of other parts such as tightening bolts, and to insert the tightening bolt into the through hole of the fitting part. It is. Therefore, when the pipe joint device is shipped from a factory, it contributes to improving the efficiency of the work of assembling various constituent members into a unified body.

(Effects during pipe connection work) The binding part of the connecting member attached to the pipe joint device binds the shaft of the connecting rod so that it cannot be separated, and the fitting part is tightened. The tightening bolt is fitted onto the bolt and remains inseparable, and the tightening bolt is inserted into the flange portion of the holding fitting via the fitting portion and is held in such a state that it will not fall off. Such a condition is
Even if the split fittings, which are the constituent members of the holding fittings, are removed from the tightening bolts, the overall integrity of the pipe joint device will not be lost. Therefore, workers who handle pipe joint devices realize that it is not necessary to disassemble all of the component parts in the preparation stage of pipe connection work, which contributes to a reduction in work man-hours and work time, and allows for reconfiguration during work. There is no risk of losing parts.

(Effects when buried underground) The tied part of the connecting member tied to the shaft part of the connecting rod uses its soft elasticity to fill the clamping space formed between the opposing flange parts. In order to ensure this, it is ensured that the bending and expansion/contraction phenomena occur at the joints of the pipes in a natural manner, and that earth and sand are prevented from entering the clamping space, thereby ensuring that the connecting pipes are within a specified range. It does not interfere with movement in the axial direction. In particular, since the fitting portion of the connecting member into which the tightening bolt is fitted is a cylindrical body with no missing parts, the screw of the tightening bolt, which is most susceptible to corrosion damage when buried underground, is protected. Therefore,
The pipe joint device can withstand long-term underground burial.

[Brief explanation of drawings]

1 and 2 show a connecting member according to a first embodiment of the present invention, in which FIG. 1 is a perspective view thereof, and FIG. 2 is a partially sectional front view thereof. be. FIG. 3 shows a connecting member according to a second embodiment of the present invention, and is a partially sectional front view. FIG. 4 is a perspective view of a pipe joint device equipped with a connecting member according to a first embodiment of the present invention.
FIG. 5 is a perspective view showing a connection section of water pipes connected by the pipe joint device shown in FIG. 4, FIG. FIG. 8 is a half-sectional view taken in a direction perpendicular to the tube axis at a position near the insertion tube side of the above connection portion, and FIG. 8 is a partially enlarged perspective view of the insertion tube side holding fitting of the same connection portion. 9 to 12 are diagrams explaining the invention of the earlier application, and FIG. 9 is a perspective view of the connecting member according to the invention of the earlier application,
FIG. 10 is a perspective view of the pipe joint device with the connecting member attached thereto, and FIG. 11 is a perspective view showing the connecting member secured to the connecting rod with the help of a tightening bolt. FIG. 12 is a front view showing a state when a tightening bolt is inserted into the fitting portion of the above connecting member. 1, 2...Water pipe, 15...Pipe joint device, 1
6, 17...Holding metal fitting, 18...Flange part, 2
2... Connecting rod, 57... Tightening bolt, 70, 80
... Connecting member, 71 ... Fitting part, 74 ... Binding part, 75 ... Fitting female part, 78 ... Fitting male part.

Claims (1)

[Claims] 1. A split arc-shaped holding fitting that is attached near the joint of both pipes to be connected in series, a connecting rod that ensures the permissible expansion/contraction distance of the connecting part within a predetermined range, and a holding fitting that is attached to the pipe by attaching the holding fitting to the pipe. It is provided with a tightening bolt and a nut for tightening the connecting rod and clamping the shaft of the connecting rod, and opposing flanges provided on both sides of the arc-shaped holding fitting have holes for inserting the tightening bolt. A pipe joint device in which a hole is drilled, and a protruding piece is provided at the tip of each flange portion to form a space for inserting and holding the shaft portion of the connecting rod between the opposing flange portions when the holding fitting is tightened. A connecting member attached to the clamping space in which the connecting member has a band-shaped binding part and a fitting part located at one end of the binding part made of a soft elastic material such as a rubber material or a resin material. The binding part is tied to the shaft part of the connecting rod, the fitting part is fitted with a tightening bolt inserted through the through hole, and the binding part and other parts are fixed to each other. A connecting member for a connecting rod for a pipe joint and a tightening bolt, characterized in that the end and the fitting part are male and female fitted.