JP3513744B2 - Pipe fixing tool - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fixing tool used when connecting resin pipes through fusion-bonding joints. More specifically, the present invention relates to a pipe fixing tool that can be easily attached to a pipe before connection to the pipe and removed from the pipe after connection to the pipe, and that is compatible with various pipe outer diameters.

[0002]

2. Description of the Related Art In recent years, polyethylene pipes have been widely used for city gas pipes. This is because polyethylene pipes are more resistant to corrosion and earthquakes than conventional plated steel pipes, and they have excellent workability in plumbing work. To connect this polyethylene pipe, an electrofusion joint (EF joint) is used to connect the outer peripheral surface of the end of the pipe to the E pipe.
A method of fusion bonding the inner peripheral surface of the F joint is generally used.

FIG. 8 is a perspective view showing the work of joining a resin pipe using a general EF joint. EF joint 28
Reference numeral 1 is a tubular body made of a thermoplastic such as polyethylene or polybutene, and has a joint hole 282. The heating wire (not shown) is connected to the joint hole 28.
It is embedded in the joint body along the inner peripheral surface of 2. A pipe joining operation using the EF joint having such a configuration will be described. First, the resin pipe 283 to be joined to the joining hole 282 is inserted. Next, the pipe 283 is attached to the pipe fixing tool 285.
After fixing by, energize the heating wire. The heating wire generates heat by Joule heat, melts polyethylene having a melting point of about 130 ° C., and integrates the pipe 283 and the EF joint 281. As a result, the two pipes 283 are connected to the EF joint 28
Can be connected via 1.

The reason why the pipe 283 is fixed by the pipe fixing tool 285 during the joining operation is that the pipe 283 and the EF are fixed.
During fusion bonding with the joint 281, the pipe 283 and the EF joint 281
This is to fix and. If the pipe 283 is displaced in the EF joint 281 during the joining work, a defect may occur in the joint portion and the long-term life of the joint portion may be deteriorated. Therefore,
This fixing has a great influence on the success or failure of the joining work.

The conventional pipe fixing tool 285 is the same as the pipe 2
Two sets of clamp arms 286 for gripping the outer peripheral surface of 83,
Have left and right. After the pipe 283 is sandwiched by the clamp arm 286, the tightening handle 287 is rotated to tighten and fix the clamp arm 286. The shape and dimensions of the joint fixing pipe fixing tool 285 differ depending on the sizes of the EF joint 281 and the pipe 283 and the type of the EF joint 281.

[0006]

The above-mentioned conventional pipe fixing tool for connecting a joint has the following problems. When attaching the pipe fixing tool to the pipe, it is necessary to immerse the pipe fixing tool under the EF joint in which the pipe is inserted, or to put the pipe fixing tool in advance.
It took a lot of work. When the pipe fixing tool is set in advance, it is necessary to flatten the bottom of the working hole for burying the pipe. Depending on the type (socket, elbow, cheese, etc.) and size of the EF joint, many types of pipe fixing tools had to be prepared.

Therefore, the present applicant has filed Japanese Patent Application Laid-Open No. 10-1567.
Proposed is a pipe fixing tool disclosed in No. 37 for connecting a fusion splicing joint. However, the proposed pipe fixing tool has the following inadequate points. Depending on the diameter of the pipe to be connected, it must be replaced with a chain of different length. In the pipe fixing tool according to the specific example of the above proposal, two continuous plastic combination chains are used as the winding means, but it is desirable to increase the strength of the chain. I would like to be able to easily fix two pipes with different diameters even when connecting them with different diameter sockets. I want to reduce the storage space for storing tools.

The present invention has been made in view of the above problems, and an object thereof is to provide a pipe fixing tool for fusion splicing work which is easier to use.

[0009]

[0010]

[0011]

The pipe fixing tool of the present invention is used for connecting two resin pipes through a fusion joint.
Pipe fixing tool used; it on the outer circumference of each pipe
The pair of pressing parts that are respectively pressed and the pair of pressing parts
Wrap around the connecting part to connect and the outer peripheral surface of each pipe
A pair of winding members that can be locked to each pressing portion,
And is detachably inserted into the pressing section and the outer peripheral surface of the pipe.
Spacer, and whether this spacer is the pressing part
It is specially equipped with a drop-out prevention means to prevent it from falling off.
To collect . When fixing two pipes with different diameters,
This can be dealt with by inserting a spacer between the outer peripheral surface of the pipe on the small diameter side and the pressing portion. Since there is a spacer falling-off preventing means, the spacer can be handled integrally with the pipe fixing tool.

In the pipe fixing tool of the present invention, it is preferable that the connecting portion is extendable. If the connecting part is extended, the span between the two pressing parts can be lengthened, and if the connecting part is shortened, the pipe fixing tool becomes smaller as a whole, which is convenient for carrying and storing. Moreover, it is preferable that the pressing portion is rotatable with respect to the connecting portion. Whether the joint type is socket (straight pipe type) or elbow, one pipe fixing tool can be used for various joints.

A description will be given below with reference to the drawings. Figure 1
FIG. 3 is a partial cross-sectional side view showing the overall configuration of a pipe fixing tool according to an embodiment of the present invention. FIG. 2 is a plan view showing the entire pipe fixing tool of this embodiment. FIG. 3 is a sectional view showing the front surface of the pipe fixing tool of the present embodiment. Figure 4
[Fig. 4] is a perspective view showing a main part of the pipe fixing tool of the present embodiment. FIG. 5 is a component diagram of the main body of the pipe fixing tool of the present embodiment. FIG. 6 is a plan view of the chain of the pipe fixing tool of this embodiment.

FIG. 1 shows two left and right resin pipes 5 and a fusion splicing joint 3. Ends 5c of two resin pipes 5
Is plugged into the joint 3. The left and right pipes 5 are fixed to each other by the pipe fixing tool 1 of this embodiment. The pipe fixing tool 1 includes a pair of left and right pressing portions 13, 14
And a chain (winding member) 15 and a connecting portion 11 connecting both pressing portions.

The left and right pressing portions 13 and 14 are substantially symmetrical and will be described together. The pressing portions 13 and 14 are shown in FIG.
And as shown in FIG. 4, it is comprised centering on the main body 21. In this example, the main body 21 has a block shape made of aluminum alloy, and the lower surface (pressing surface 21c) of the main body 21 contacts the outer peripheral surface of the pipe 5. Note that, here, the up-down direction in FIGS. 3 and 4 is referred to as up-down.

A chain clamp handle 50 and a connecting base 71 are mounted on the pressing portion main body 21. As shown in FIG. 3, one end (base end) 15 a of the chain 15 is attached to the pressing portion main body 21 via the clamp screw 45 and the clamp handle 50. The other end 1 of the chain 15
The 5z is locked to the main body 21 by dropping the locking pin 29 (35) protruding laterally of the chain into the locking groove 21a of the main body 21 as shown in FIG.

The connecting base 71 is rotatably connected to the pressing portion main body 21. The angle between the connecting base 71 and the main body 21 can be changed according to the type of joint. Figure 1
In the case shown in, since the joint 3 is a straight tubular socket,
The longitudinal direction of the connecting base 71 and the longitudinal direction of the pressing unit main body 21 are
Almost orthogonal. On the other hand, the case of FIG. 4 is the case of the work using the 90 ° elbow type joint, and the longitudinal direction of the connecting base 71 and the longitudinal direction of the main body 21 are inclined by 45 °. The mechanism of adjusting both angles will be described later.

The details of the pressing portion main body will be described with reference to FIG. 5A is a plan view, FIG. 5B is a front sectional view, and FIG. 5C is a bottom view. The lower surface 21c of the main body 21 shown in FIG. 5B is a surface that is pressed against the outer peripheral surface of the pipe, as described above. The main body 21 is roughly divided in the left-right direction of FIG.
And a central portion 21f and a clamp handle mounting portion 21n. The chain end locking portion 21b has a bifurcated structure that projects like a cantilever from the central portion 21f to the right. The clamp handle mounting portion 21n is raised obliquely above the central portion 21f and has a recess 21p on the lower surface.

A U-shaped locking groove 21a is formed on the upper surface of the chain end locking portion 21b. This locking groove 21a
As shown in FIG. 4, the locking pin 29 (or 35, see FIG. 6) at the tip (or in the middle) of the chain 15 is dropped into and locked in. As shown in FIG. 6, the chain 15 is provided with a large number of locking pins 29 and 35 in accordance with the outer diameter of the pipe, which is symmetrical in connection work. By locking one of the locking pins 29, 35 in the main body locking groove 21a in accordance with the pipe, it is possible to easily fix pipes of various outer diameters with one chain 15.

The upper surface of the central portion 21f of the main body 21 is a flat connecting base sliding surface 21e. On the same surface 21e,
As shown in FIG. 5A, the screw hole 21h and the knock hole 21
g, a mark 21j, etc. are formed. Screw hole 21h
As shown in the left side main body 21 of FIG. 1, a joint base rotation center shaft 75 is fixed to this. The shaft 75 is the central axis of rotation of the connecting base 71.

Four knock holes 21g are arranged on an arc of a certain radius centered on the screw hole 21h. These holes 21g are at an angle to each other (eg 11 ° 15 ', 22
30 ', 45 °). Also these holes 2
A spring pin (knock pin) 73 is fitted to 1g as shown in the left main body 21 of FIG. By this fitting, the relative angle between the connecting base 71 and the main body 21 is determined.
The mark 21j is used to display the angle between the connecting base 71 and the main body 21 as shown in FIG.

A clamp screw through hole 21m is formed in the clamp handle mounting portion 21n of the pressing portion main body 21. As shown in FIG. 3, the handle base 47 is fitted into the hole 21m. The handle base 47 is screwed with the clamp screw 45, and when the clamp handle 50 is rotated, the handle base 47 also rotates synchronously, the clamp screw 45 moves up and down accordingly, and the inner circumference of the chain 15 expands.
to shrink. Recess 2 under clamp handle attachment 21n
As shown in FIG. 3, the lower part of the chain guide roller 23 and the clamp screw 45 is housed in 1p. Figure 5
As shown in (B), a mounting hole 21r for a pin (25 in FIG. 3) for supporting the guide roller is formed in the side wall 21s of the recess 21p.

As shown in FIG. 5C, the pressing portion main body 21
There are two spacer engaging holes 2 in the center of the lower surface 21c of the
1u is formed. In this hole, as shown in FIG. 7A, the pin 103 of the pipe outer diameter adjusting spacer 101 is provided.
And the O-ring 105 is inserted.

Next, the structure of the chain 15 will be described with reference to FIGS. 6 and 3. Base end 15a of chain 15
A clamp screw 45 is provided (at the lower end of FIG. 6). The clamp screw 45 is a relatively long screw and is screwed with the handle base 47 as shown in FIG. The clamp screw 45 is rotatably connected to the link at the base end 15a of the chain 15 by a pin.

The main body of the chain 15 has links 37 and 39.
And a pin 33 and a roller 31. Here, the links 37, 39 and the pin 33 are made of stainless steel (SUS30
4) Made. Roller 31 is resin (polyacetal)
It is made. The diameter of the roller 31 is the links 37, 3
The width is larger than the width of 9, and the outer surface of the roller 31 contacts the outer peripheral surface of the pipe when the chain 15 winds around the pipe. Since the links 37 and 39 of the chain 15 are made of metal in this way, the strength of the chain can be sufficiently secured and the pipe can be firmly tightened. However, even in that case, since the outer surface of the resin roller 31 contacts the outer peripheral surface of the pipe and the links 37 and 39 do not contact the outer periphery of the pipe, there is no risk of damaging the pipe.

Some of the pins of the chain 15 near the tip 15z are made long and project to both sides of the chain 15. That is, the locking pins 29-1 to 29-3 and 35-1 to 35-4 from the tip 15z side. As shown in FIG. 4, these locking pins 29 and 35 are dropped into the locking groove 21a of the pressing portion main body 21 to lock the tip of the chain 15 to the pressing portion main body 21. The reason why the plurality of locking pins 29, 35 are provided is to adjust the length of the chain 15 according to the pipe having various outer diameters.

The pipe diameters corresponding to the locking pins 29 and 35 in this example are as follows. The spacer will be described later. Locking Pin 29-1: 200A 29-2: 150A 29-3: 100A 35-1: 150A Plus Spacer x 200A 35-2: 100A Plus Spacer x 200A 35-3: 100A Plus Spacer x 150A 35-4: 75A Plus spacer × 100A Here, the engaging pin 29 is made slightly longer than the engaging pin 35 so that the pin can be easily selected during the work that is usually performed frequently (pipe connection with the same diameter). This is because.

A knob 2 is attached to the tip 15z of the chain 15.
7 is connected. The knob 27 is a relatively short round bar. When the locking pins 29 and 35 are locked to the pressing portion main body 21, the chain 15 is handled by holding this knob.

Next, a clamp structure (clamp handle 50) on the base end side of the chain 15 will be described with reference to FIG. As described above, the clamp screw 45 is connected to the base end 15a of the chain 15. The clamp screw 45 corresponds to the clamp handle mounting portion 21 of the pressing portion main body 21.
It penetrates through the n holes 21m and extends upward. The male screw on the outer side of the clamp screw 45 is screwed with the female screw on the inner diameter portion of the handle base 47.

The handle base 47 is a stepped bush-like member having a large outer diameter at the upper portion and a small outer diameter at the lower portion. The lower portion of the handle base 47 is fitted into the hole 21m of the pressing portion main body 21 via the dry met bush 51 (for example, 70B-1815 manufactured by OILES CORPORATION). The step portion between the upper part and the lower part of the handle base 47 is a dry met washer 49 (for example, 70W-1 manufactured by OILES CORPORATION).
815) and is in contact with the upper surface of the clamp handle attachment portion 21n. The handle base 47 has a hole 21m.
Rotate in.

A handle 61 is planted on the upper side surface of the handle base 47 via a hexagon socket set screw 59. When the handle 61 is turned, the handle base 47 rotates, and the clamp screw 45 screwed with the handle base 47 moves up and down. Then, the inner circumference of the chain 15 wound around the outer circumference of the pipe 5 changes, and the winding force of the chain 15 around the pipe 5 can be adjusted.

A spring pin 55 is attached to the top of the clamp screw 45 so as to penetrate laterally and project laterally of the screw 45. This spring pin 55
Hits the top of the handle base 47 when the clamp screw 45 is lowered. Clamp screw 45 at this point
Can no longer descend. This spring pin 5
5 is attached after the clamp screw 45 is assembled to the handle base 47. The outer circumference and the upper surface of the handle base 47 are covered with a screw cover 57.

A guide roller 23 is present on the chain base end portion 15a. The guide roller 23 is rotatably attached around the spring pin 25. The lower surface of the guide roller 23 has a chain base end portion 15a.
The chain 15 along the outer circumference of the pipe 5 by contacting the upper surface of the pipe.

Next, the structure of the connecting portion 11 for connecting the left and right pressing portions 13 and 14 will be described. A connecting base 71 is mounted on the pressing unit body 21. The structure between the two will be described with reference to the pressing portion main body 21 and the connecting base 71 shown on the left side of FIG.

The shaft 7 is inserted into the screw hole 21h of the main body 21.
5 are planted. The shaft 75 has a cylindrical shape. The connecting base 71 has a hole 71 a fitted into the shaft 75 and is rotatable around the shaft 75. Spring pins 73 are planted on the lower surface of the connecting base 71. The lower end of the spring pin 73 projects below the lower surface of the connecting base 71, and the pressing base body 21 shown in FIGS.
It enters into the knock hole 21g and serves as a detent (angle determination) for the connecting base 71.

A fixed knob 79 is screwed into the upper end of the shaft 75 via a washer 77. This knob 79
By turning to loosen, the connecting base 71 can be lifted up. When the connecting base 71 moves up a little, the spring pin 73 is removed from the knock hole, and the connecting base 71 becomes rotatable. On the other hand, when the spring pin 73 is aligned with the knock hole and the knob 79 is tightened, the connecting base 71 and the pressing portion main body 2
It becomes impossible to rotate with 1. By this knob operation and the spring pin, the angle between the connecting base 71 and the pressing unit main body 21 can be adjusted, and it is possible to cope with the pipe connecting work using the straight pipe socket and cheese of various angles. The connecting base 71 shown in FIGS.
The line 71c on the side wall surface is a mark for angle display.

A hole 71e is formed on the upper side surface of the connecting base 71. The left end of the connecting rod 81 is fitted into the hole 71e. The connection pin 71 and the connection rod 81 are fixed by a spring pin 80. on the other hand,
A connecting pipe 89 is fixed to the connecting base 71 on the right side of FIG. 1 by the same structure.

The right end of the connecting rod 81 is a connecting pipe 89.
1, and the connecting rod 81 can slide in the connecting pipe inner hole 89a in the left-right direction in FIG. A groove 81a is cut in the bottom surface of the connecting rod 81 so as to extend in the longitudinal direction. A detent screw 87 is inserted into the groove 81a. The screw 87 is fixed to the adapter 85 at the left end of the connecting pipe 89 and the connecting rod 81 itself. Therefore, the connecting pipe 89 and the connecting rod 81 are prevented from rotating around the axis.

A butterfly bolt 83 is attached to the adapter 85. When the butterfly bolt 83 is tightened, the tip of the butterfly bolt pushes the upper surface of the connecting rod 81,
The connecting pipe 89 becomes non-slideable, and the length of the connecting portion 11 is fixed. On the other hand, if you loosen the butterfly bolt 83,
The connecting rod 81 can be slid in the connecting pipe 89, and the length of the connecting portion 11 can be changed. The position of the right side pressing portion 13 ′ shown by the chain double-dashed line in FIG. 2 is the state where the connecting portion 11 is at its shortest (length L 1). By extending the connecting portion, the span between the two pressing portions can be lengthened (length L2), and it is possible to handle work using a large joint. On the other hand, if the connecting part is shortened, the entire pipe fixing tool becomes smaller, which is convenient for carrying and storing.

Next, the overall method of using the pipe fixing tool of this embodiment will be described collectively. First, when not in use, the connecting portion 11 is usually the shortest. This allows a small storage space. When using the pipe fixing tool, loosen the wing bolts 83 and take out the connecting rod 81 to connect the connecting portion 1
1 is an appropriate length. Then, the butterfly bolts 83 are tightened to fix the space between the left and right pressing portions 13 and 14.

Next, the angles of the pressing portion main body 21 and the connecting base 71 are adjusted according to the form of the joint 3 used for the pipe fusion work at that time. At this time, the knob 79 is loosened to align the positioning pin 73 with the knock hole 21g, and then the knob 7
9 is tightened to fix the angle between the pressing portion main body 21 and the connecting base 71.

Next, the left and right pressing part bodies 21 are placed on the left and right pipes 5. Then, the chain 15 is turned to the outer peripheral surface of the pipe, and the locking pins 29 and 35 corresponding to the diameter of the pipe 5 are inserted into the locking groove 21 a of the pressing portion main body 21. Next, the clamp screw tightening handle 50 is turned to pull up the clamp screw 45, and the chain 15 and the pressing surface 21c of the pressing portion main body.
Is closely attached to the outer surface of the pipe 5.

Next, the case of connecting pipes having different diameters will be described. FIG. 7A is a side view showing a state of work for connecting pipes having different diameters. FIG. 7B is a front view showing an example of a spacer used for the work.
In this work, the small diameter pipe 111 on the left side and the large diameter pipe 115 on the right side are connected via the different diameter socket 113.
At this time, the pipe fixing tool 1 is the same as that used for the pipe connection work with the same diameter. Then, the pressing portion 13 applied to the large diameter pipe 115 on the right side is in the same state as the work of FIG.

On the other hand, the left pressing portion 14 is provided with a spacer 101 between it and the small diameter pipe 111. As shown in FIG. 7 (B), the spacer 101 includes a spacer body 101, a pin 103 implanted on the top of the spacer body 101,
The O-ring 105 is fitted around the base of the pin 103.

The spacer body 101 is in the shape of a figure eight as a whole. The upper surface 101 a of the spacer body 101 contacts the lower surface of the pressing portion body 21, and the lower surface 101 c of the spacer body 101 is pressed against the outer peripheral surface of the pipe 111. The thickness of the spacer body 101 eliminates the step (H in the figure) on the upper surfaces of the left and right pipes 111 and 115, and the same pipe fixing tool 1 can be used even in the case of a pipe having a different diameter.

The pin 103 of the spacer 101 is shown in FIG.
As shown in (A), two pipes are provided in the longitudinal direction of the pipe. Each pin 103 has a pin hole 2 on the lower surface of the pressing unit body 21.
Fit in 1u. Then, the O-ring (friction locking member) 1
05 is pressed against the inner wall of the pin hole, and the spacer body 101 is locked to the pressing portion body by the frictional force. Therefore, the spacer 101 does not fall off unexpectedly during the work, which facilitates the work.

Although one embodiment of the present invention has been described above, the following various improvements and additions can be made, for example. A wire with a round cross section is used as the strip. Allows one-touch setting of the angle between the pressing unit main body and the connection base. The length of connecting rod and connecting pipe can be set with one touch.

[0048]

As is apparent from the above description, the pipe fixing tool of the present invention exhibits the following effects. In the pipe fixing tool of the present invention, since the winding member can adjust the length corresponding to various pipe outer diameters, a plurality of types of pipes having different diameters can be handled as a single pipe without replacing the winding means such as a chain. Can be handled with fixed tools. Furthermore, when the winding member is a chain having a resin roller and a metal link, and the roller comes into contact with the outer peripheral surface of the pipe when the chain winds around the pipe, sufficient strength of the chain can be obtained. ,
You can firmly tighten the pipe,
There is no risk of scratching the outer peripheral surface of the pipe.

Further, in the case where the pressing unit and the spacer which is detachably inserted into the outer peripheral surface of the pipe are provided, the pipe having the smaller diameter side is fixed when fixing the two pipes having different diameters. This can be dealt with by inserting a spacer between the outer peripheral surface and the pressing portion. Since there is a spacer falling-off preventing means, the spacer can be handled integrally with the pipe fixing tool. Further, if the connecting portion is expandable, the span between the two pressing portions can be lengthened by extending the connecting portion, and if the connecting portion is shortened, the pipe fixing tool becomes smaller as a whole, which is convenient for carrying and storing.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an overall configuration of a pipe fixing tool according to an embodiment of the present invention.

FIG. 2 is a plan view showing the entire pipe fixing tool of the present embodiment.

FIG. 3 is a cross-sectional view showing the front of the pipe fixing tool of the present embodiment.

FIG. 4 is a perspective view showing a main part of the pipe fixing tool of the present embodiment.

FIG. 5 is a component diagram of the main body of the pipe fixing tool of the present embodiment. 5A is a plan view, FIG. 5B is a front sectional view, and FIG. 5C is a bottom view.

FIG. 6 is a plan view of the chain of the pipe fixing tool according to the present embodiment.

FIG. 7 (A) is a side view showing a state of a work for connecting pipes having different diameters, and FIG. 7 (B) is a front view showing an example of a spacer used for the work.

FIG. 8 is a perspective view showing a work state of joining a resin pipe using a general EF joint.

[Explanation of symbols]

1 pipe fixing tool 3 joint 5 resin pipe 5c end 11 connecting part 13, 14, 13 'pressing part 15 chain (winding member) 15a, 15z end 21 main body 21a locking groove 21b chain tip locking part 21c pressing surface (lower surface) ) 21e Connection slide surface (upper surface) 21f Center part 21g Knock hole 21h Screw hole 21j Mark 21m Clamp screw through hole 21n Clamp handle mounting part 21p Recess 21r Guide roller pin mounting hole 21s Side wall 21u Spacer engaging hole 23 Guide roller 25 Spring pin 27 Knob 29 Locking Pin (Long) 31 Resin Roller 33 Chain Pin 35 Locking Pin (Short) 37, 39 Link 45 Clamp Screw 47 Handle Base 49 Drymet Washer 50 Clamp Handle 51 Drymet Bushing 53 C Type Because wheel 55 spring pin 57 screw covers 59 hexagon socket set screw 61 handle 71 connecting base 71a hole 71c line 71
e Hole 73 Spring pin 75 Shaft 77 Washer 79 Fixed knob 80 Spring pin 81 Connecting rod 8
1a Groove 83 Butterfly bolt 85 Adapter 87 Positioning screw 89 Connecting pipe 89a Inner hole 101 Spacer 101a Upper surface 101c Lower surface 103 Pin 105 O-ring 111, 115 Pipe 113 Different diameter socket 281 EF joint 282 Resin pipe 285 Pipe fixing tool 286 Clamp Arm 287 tightening handle

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B25B 11/00 B25B 27/00 B25B 13/52 F16L 55/18

Claims (3)

(57) [Claims] 1. A pipe fixing tool used for connecting two resin pipes through a fusion joint; a pair of pressing parts respectively pressed against the outer peripheral surface of each pipe, and a pair of pressing parts. a connecting portion for connecting to, wound respectively on each pipe outer peripheral surface, and a lockable pair of winding members in the pressing unit, and a spacer that is removably inserted into the upper Symbol pressing portion and the pipe outer peripheral surface, And a pipe fixing tool, which is provided with a drop-out preventing means for preventing the spacer from falling off from the pressing portion. 2. A pipe fixing tool according to claim 1, wherein said falling prevention means characterized in that it comprises a frictional engaging member. 3. A process according to claim 1 or 2 pipe fixing tool, wherein the said connecting portion is stretchable.