JPS6113298Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fusion splicer for connecting pipes and pipe fittings made of thermoplastic synthetic resin.

Conventionally, in order to fuse a thermoplastic synthetic resin tube or pipe joint to a thermoplastic synthetic resin tube (for example, polyethylene) with the same axis line in an excavation pit, a fusion machine such as the one shown in Fig. 1 has been used. 1 is used. The fuser 1 is installed at the bottom 3 of an excavation pit 2, and holds, for example, a pipe 4 and a pipe (not shown) on the same axis. To remove the fusion splicer 1 after the fusion of the tube 4 and the unillustrated tube is completed, the fused tube 4 and the unillustrated tube are lowered to the side of the fusion splicer 1 as indicated by arrow 5. Next, the fusion device 1 is pulled up vertically and taken out from the excavation hole 2. Therefore, the excavation shaft 2 requires extra space for placing the pipe 4 and a pipe not shown. Furthermore, if the pipe 4 is buried underground and a portion of it is exposed to the excavation shaft 2, it is difficult to remove the fusion splicer 1 because the pipe 4 cannot be moved.

If it is not possible to move the pipe 4 after connection as shown in Figure 1, rotate the fusion machine 1 180 degrees around the axis of the pipe 4 as shown by the arrow 6 in Figure 2 to create a virtual The fuser 1 is brought to the upper position indicated by the line. Then, the fusion splicer 1 can be pulled up and removed. However, the fusion splicer 1 is provided with wheels 7, legs, etc. as shown in the figure, and the fusion splicer 1
is relatively heavy. Therefore, workability is poor. Further, the excavation hole 2 must be made wide in order to enable the fusion splicer 1 to rotate 180 degrees.

Therefore, the main object of the present invention is to solve the above-mentioned technical problems and to provide a welding machine capable of welding pipes and pipe fittings in a relatively narrow excavation.

FIG. 3 is a front view of the interior of the excavation shaft 9 according to an embodiment of the present invention. A pipe 10 for transporting city gas, for example, is made of thermoplastic synthetic resin, such as polyethylene, and is buried underground. In the excavation pit 9 in which the end of the pipe 10 is exposed, a pipe joint 11 such as an elbow made of thermoplastic synthetic resin, for example polyethylene, is connected to the fuser 1 according to the invention.
2 to the tube 10.

FIG. 4 is a sectional view showing the state when the pipe 10 and the pipe joint 11 are connected. The fusion machine 12 is
It is installed in the excavation shaft 9 across the pipe 10. tube 10
The end portion of the pipe joint 11 is detachably held by a first holding member 26, and the pipe joint 11 has an axis extending from the axis of the tube 10 and is detachably held by a second holding member 36.
When connecting to the pipe 10 and pipe joint 11,
First, the outer circumferential fused portion 10a of the pipe 10 and the inner circumferential fused portion 11a of the pipe joint 11 are heated by the heater 60 (see FIG. 9), and both fused portions 10a, 11a is pressed and fused. At this time, if the buried pipe 10 cannot be moved as shown in the third figure, the pipe joint 11 is moved in the direction of the pipe 10 and press-fitted. Further, when the pipe 10 and the pipe joint 11 are both movable, they can be moved in the proximal direction and brought into pressure contact.

FIG. 5 is a partially cutaway vertical sectional view of the fusion splicer 12, and FIG. 6 is a plan view of the fusion splicer 12. The frame bodies 13 of the fusion splicer 12 are arranged in pairs on both sides of the tube 10.
two sets of vertically extending legs 14, 15; 16, 17 arranged at intervals in the axial direction of the tube 10; a pair of guide bodies 18, 19 extending laterally parallel to the axis of the tube 10; Above the pipe 10, a guide body 18,
Fixed to both ends of 19, legs 14, 15; 16, 17
The guide members 20 and 21 are slidably inserted into the guide members 20 and 21. The guide members 20 and 21 have legs 14 and 15;
Guide members 20, 2 along the radial direction of 16, 17
Bolts 22, 23 penetrating the wall of 1 so as to move forward and backward;
24 and 25 are provided, respectively. By means of those bolts 22, 23; 24, 25 the guide member 2
0, 21 are fixed to the legs 14, 15; 16, 17, thus determining the height position of the guides 18, 19.

FIG. 7 is a sectional view taken along the section line A-B-C-D in FIG. 6. Guide bodies 18 and 19 are fitted into the pair of guide holes 28 of the first holding member 26 that holds the tube 10 via cylindrical slidable members 29 . Therefore, the first holding member 26
It can be freely displaced along. The first holding member 26 is
Basically, it is a half tube, and one end in the circumferential direction is the tube 1.
They are mutually pivotally supported by hinge pins 30 parallel to the axis of the tube 10, and the opposite sides of the guide bodies 18 and 19 (lower side in the figure) with respect to the axis of the tube 10 can be opened and closed. At the other end in the circumferential direction of the first holding member 26, a screw lock piece 33 is provided which is pivotally supported by a pin 32 parallel to the hinge pin 30. The first holding member 26 is locked by threading the bolt 35 provided on the screw locking piece 33 toward the locking protrusion 34. In the locked state as shown, the first holding member 26
A fitting portion 27 into which the tube 10 is fitted is formed in the fitting portion 27 .
A support shaft 54 for pivotally supporting a first operating rod 47, which will be described later, is protruded from the first holding member 26 at right angles to the axis of the tube 1.

FIG. 8 is a sectional view taken along the section line E-F-G-H in FIG. 6. Guide bodies 18 and 19 are fitted into the pair of guide holes 38 of the second holding member 36 that holds the pipe joint 11 via a cylindrical sliding member 39. Therefore, the second holding member 36
It is freely displaceable along lines 8 and 19. The second holding member 36 is basically a half-tube, and one circumferential end of the second holding member 36 is pivotally supported by a hinge pin 40 parallel to the axis of the tube 10.
It can be opened and closed on the opposite side of 8 and 19 (lower side in the figure). At the other end in the circumferential direction of the second holding member 36, a screw lock piece 43 is provided which is pivotally supported by a pin 42 parallel to the hinge pin 40. By threading the bolt 45 provided on the screw locking piece 43 toward the locking protrusion 44, the second holding member 36 is locked. In the locked state as shown, the second holding member 36 is formed with a fitting portion 37 having an axis extending from the axis of the tube 10 and into which the pipe fitting 11 is fitted.
A support shaft 57 for pivotally supporting the second operating rod 48 is protruded from the second holding member 36 at right angles to the axial extension line of the tube 10 .

The distance l between the pair of legs 14, 15; 16, 17 is the diameter d1 of the fitting part 27 into which the pipe 10 is fitted and the diameter d2 of the fitting part 37 into which the pipe fitting 11 is fitted.
larger than Moreover, the fitting part 2 is within the range of distance l.
7,37 are selected. Therefore, the fusion splicer 12 can straddle the pipe 10 and the pipe fitting 11 without the legs 14, 15; 16, 17 of the fusion splicer 12 coming into contact with the pipe 10 and the pipe fitting 11.

The first and second holding members 26, 36 are attached to the guide body 1.
moving means 46 for moving along the lines 8 and 19;
is provided. The moving means 46 moves the first holding member 2
6 and the first holding member 36 for moving the second holding member 36.
and a link 49 that connects the lower ends of the holding member 2 operating rods 47 and 48 and the first and second operating rods 47 and 48. Both ends of the link 49 and the lower ends of the first and second operating rods 47 and 48 are connected by pins 50 and 51 that are horizontal and perpendicular to the axes of the pipe 10 and the pipe joint 11. 1st and 2nd operating rod 4
Grips 52 and 53 are provided at the upper ends of 7 and 48, respectively.

The first operating rod 47 is pivotally supported by a support shaft 54 projecting from the first holding member 26 in the middle thereof.
An external thread 55 is carved on the outer periphery of the tip of the support shaft 54 . By screwing the nut 56 onto the external screw 55 from the outside of the first operating rod 47, the first operating rod 47
is attached to the support shaft 54. Similarly, the second operating rod 48 is attached to the second holding member 36 on the way.
It is pivotally supported by a support shaft 57 which is provided in a protruding manner. A nut 59 is screwed onto the outer thread 58 of the support shaft 57.
A second operating rod 48 is attached to the support shaft 57.

FIG. 9 is a partially cutaway sectional view showing the state when the heater 60 is in use. A first heating surface 62 and a second heating surface 63 are provided on opposite sides of the base 61 of the heater 60, respectively. tube 10
The first heating surface 62 that should heat the outer periphery fused portion 10a of
is recessed and has an inner diameter that matches the outer circumference of the tube 10. In addition, the inner circumference fused portion 11 of the pipe joint 11
The second heating surface 63 that is to be heated has an outer diameter that matches the inner circumference of the pipe joint 11 and is formed to protrude outward.

When connecting the pipe 10 and the pipe fitting 11, the fusion splicer 12 is installed across the pipe 10 and the pipe fitting 11 with the first and second holding members 26, 36 open downward. and the first holding member 26
The tube 10 is fitted and held in the fitting part 27 of. Next, the pipe joint 11 is fitted into the fitting portion 37 of the second holding member 36 and held. Then, the base 61 of the heater 60 is interposed between the pipe 10 and the pipe joint 11. At this time, the first heating section 62
Furthermore, the second heating portions 63 are directed toward the inner peripheral fused portion 11a of the pipe joint 11, respectively. In this state, the first operating lever 47 is fixed, and the second operating lever 48
is rotated around the support shaft 57 as shown by the arrow 64 in FIG. Then, the second holding member 36
The pipe joint 11 held by the second holding member 36 is also displaced along the guide bodies 18 and 19 as indicated by the arrow 65 in the figure. Therefore, the outer circumferential fused portion 10a of the pipe 10 and the inner circumferential fused portion 11a of the pipe joint 11 are brought into close contact with the first and second heating surfaces 62, 63 of the heater 60, respectively, as shown in FIG. In this state, the heat transfer wires (not shown) in the base 61 are energized, and each fused portion 10a, 11a is
Heat for a specified period of time. After heating, the second operating rod 48 is rotated in the direction opposite to the arrow 64 to displace the second holding member 36 in the opposite direction to the arrow 65.
Remove 0. After that, move the second operating rod 48 to arrow 6.
Rotate again in direction 4. Then pipe fitting 1
1 is displaced in the direction of arrow 65 as described above,
The outer circumferential fused portion 10a of the pipe 10 and the inner circumferential fused portion 11a of the pipe joint 11 are pressed together. The outer periphery fused portion 10a and the outer periphery fused portion 11a, which are heated for the purpose of bending, are thermally fused to each other.

After the pipe 10 and pipe joint 11 are fused together,
Loosen the bolts 35, 45 and remove the screw lock piece 33,
Release 43. Then, the first holding member 26 and the second holding member 36 can be opened downward. Therefore, by pulling the fusion splicer 12 vertically upward, it can be taken out from the excavation pit 9. Therefore, even if the excavation hole is relatively narrow, the fuser 12 can be easily taken out.

As another embodiment of the present invention, a pipe 1
0 and the pipe joint 11, the fusion splicer 12 may be turned upside down from the state shown in FIG. 5 and installed on the ground. In that case, first remove the nuts 56, 59 screwed onto the support shafts 54, 57, and turn the operating rods 47, 48 upside down so that the grips 52, 53 of the operating rods 47, 48 protrude upward. As a posture,
It is only necessary to attach them to the support shafts 54 and 57 again.
Guide body 1 by bolts 22, 23; 24, 25
Since the height positions of 8 and 19 can be adjusted freely,
In particular, even when the present fusion splicer 12 is used upside down, the pipes 10 and pipe joints 11 to be fused can be
Fusion work can be performed efficiently regardless of the height position.

In the case where the pipes are connected by making the axes the same and abutting the end surfaces of both pipes, the first holding member 26
A grinding machine 6 as shown by the imaginary line in FIG.
6 is installed removably. After the connecting end surfaces of both tubes are ground, the two tubes are connected in the same manner as described in the embodiment shown in FIGS. 3 to 9.

FIG. 10 shows a part of another embodiment of the present invention.
In this embodiment, a screw lock piece 70 is used in place of the screw lock piece 33 of the first holding member 26 described above. The notable feature is the screw lock piece 70.
are pivotally supported on one of the half tubes by a pin 71 perpendicular to the tube axis, and are mutually connected by threading the bolt 73 of the screw lock piece 70 into a locking protrusion 72 formed on the other half tube. Achieve tightness. Screw lock piece 7
0 around the pin 71 as shown by the imaginary line, the tightening can be released.
The screw locking piece 70 also relates to the second holding member 36.
is used. According to this embodiment, since the swing range of the screw lock piece 70 is parallel to the tube axis, there is an advantage that the excavation hole 9 can be made relatively small.

FIG. 11 shows a part of yet another embodiment of the present invention. The screw lock piece 75, which can be replaced with the screw lock pieces 33, 43, and 70 described above, is attached to the first holding member 26.
A locking protrusion 76 formed on the circumferential end of the half-tube,
77 are mutually tightened with bolts 78. bolt 78
By loosening the screw lock piece 75, the screw lock piece 75 can be moved in the tube axis direction as shown by the imaginary line and removed. A screw locking piece 75 can also be used in connection with the second retaining member 36. According to this embodiment, since the movement range of the screw lock piece 75 is parallel to the tube axis, there is an advantage that the excavation hole 9 can be made relatively small.

As described above, according to the present invention, a pair of guide bodies extending in parallel in the lateral direction are provided on two sets of legs arranged with an interval larger than the outer diameter of the tube axis, and either the upper or lower A pair of holding members that can be opened in the same direction and hold the pipe, etc. integrally are arranged movably along the guide body, so that the pipe, etc. can be fused in either the upper or lower direction. The machine can be removed. Therefore, pipes and the like can be easily fused even in a relatively narrow excavation pit. Further, according to the present invention, the pair of holding members can be moved in the direction closer to each other by applying forces in the direction closer to each other on the first and second operating rods 47 and 48. .

The first and second operating rods 47 and 48 can be removable from one half of the holding member that moves along the guide, so even when the holding member is upside down, the first and second operating rods 47 and 48 can be removed from above. Second operating rod 47, 48
You can perform the following operations.

Since the guide body can adjust and set the connecting position of the legs in the vertical direction, work efficiency is further improved.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views for explaining a method of removing a conventional fusion splicer 1 in an excavation shaft 2, FIG. 3 is a front view of an embodiment of the present invention, and FIG. 4 is a pipe 10. and a sectional view showing the fused state of the pipe joint 11, FIG. 5 is a partially cutaway longitudinal sectional view of the fusion splicer 12,
6 is a plan view of the fusion splicer 12, FIG. 7 is a sectional view taken along the section line A-B-C-D in FIG. 6, and FIG. 8 is a section view taken along the section line E-F-- in FIG. A cross-sectional view along GH,
FIG. 9 is a partially cutaway sectional view showing the heater 60 in use, and FIGS. 10 and 11 are side views showing other embodiments of the present invention. 9... Excavation pit, 10... Pipe, 11... Pipe joint,
12... Fusion splicer, 13... Frame, 14-17...
Legs, 18, 19... Guide body, 26... First holding member, 30, 40... Hinge pin, 32, 42, 7
1... Pin, 33, 43, 70, 75... Screw lock piece, 36... Second holding member, 46... Moving means, 47... First operating rod, 48... Second operating rod,
52, 53...Gripping part.

Claims (1)

[Claims for Utility Model Registration] Two pairs of legs extending vertically and arranged at intervals with large outer diameters, such as tubes made of thermoplastic synthetic resin, and legs corresponding to each pair having both ends. constitute a frame body including a pair of guide bodies connected to each other and extending in parallel in the lateral direction, and the guide bodies include:
A pair of holding members, which have axes parallel to the guide body, can be opened upwardly or downwardly, and integrally hold the tube, etc. are attached along the guide body. The guide body is movably arranged, and the guide body can freely adjust and set the connection position in the vertical direction with the leg, and the holding member pivots one end of the half tube in the circumferential direction to each other with a hinge pin parallel to the tube axis. , the other end in the circumferential direction can be mutually tightened and opened, and one of the half tubes of each holding member is moved along a guide body, and each half tube has a second half tube having a rotation axis perpendicular to the guide body. The first and second operating rods are removably mounted, and the other ends of the first and second operating rods are connected by a link with a pin having an axis of rotation perpendicular to the guide body. Landing.