JP2000167933A - Fusion bonding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fusion bonding machine which can be reduced in size, having excellent operability with a little axial deviation of piping materials or deformation of the materials without necessity of an operation such as replacement or the like of an attachment. SOLUTION: A clamp 2 has a clamp body 5 having a grasping space S capable of inserting a piping material S having a maximum diameter to be fusion bonded to surround the space S. A plurality of rods 51 for grasping at ends 51a a piping material P are supported to the body 5 so that the rods 51 are advancingly or retractably movable from a periphery of the space S toward a center of the space S. When the rods 51 are advanced at the ends 51a to the space S, their ends 51a are brought into contact with a peripheral wall of the material P so that the rods 51 are cooperatively advanced or retracted while holding all at equal distances from the ends 51a to the center of the space S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fusing machine used for fusing thermoplastic resin piping materials to each other.

[0002]

2. Description of the Related Art Conventionally, a fusion splicer as disclosed in Japanese Patent Publication No. 27719/1986 has been used for connecting a pipe made of a thermoplastic resin. This fusing machine is capable of fusing 2
Two clamps are provided for gripping the two pipe members so that their fusion surfaces face each other, and at least one clamp is supported by the gantry so as to slide on the gantry toward the other clamp.

[0003] First, after a heating element such as a heater face is set between the clamps, the clamps are relatively slid toward the heating element while gripping the pipe material to fuse the two pipe materials. The surface is pressed against the heating element to melt the fused surface. Next, slide the clamp relatively away from the heating element, remove the heating element,
One of the clamps is relatively slid toward the other clamp to bring the fusion surfaces into close contact with each other to fuse the two pipe members.

In the case of a conventional welding machine, one attachment is replaced by replacing the attachment such as a clamp liner corresponding to the size (diameter) of a pipe material to be connected to a clamp body of a fixed size. Is capable of handling a plurality of different sizes of piping materials.

[0005] However, since a step of replacing the attachment is required every time the size is changed, a replacement work time and replacement man-hours are required in addition to a substantial fusion work. Also, because the attachments of the required size must be prepared, it becomes a large device, a large work space is required, and it is not easy to carry on site, and in the case of pipe replacement or on-site piping,
There is a problem that it is necessary to go back and forth between the work site and the piping site many times.

Further, the conventional clamp mainly employs a half-split hinge method or a V-type clamp method, so that the pipe material is deformed flat in the tightening direction by the tightening by the clamp, or the pipe is deformed by the tightening. There was also a problem that the axis of the material and the piping material were difficult to match.

[0007]

SUMMARY OF THE INVENTION In view of such circumstances, the present invention does not require any work such as replacement of an attachment, and there is little misalignment between pipes and pipes and deformation of pipes. It is an object of the present invention to provide a fusion machine that is excellent and can reduce the size of the fusion machine itself.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, a welding machine according to the present invention has two welding members for holding two pipe members to be welded such that their welding surfaces face each other. At least one of the clamps is slidably supported on the gantry in the direction of the other clamp, and the heating element is detachable at a mounting position between the pipe members gripped by both clamps. With the body mounted, both clamps are slid relatively toward the heating element, and the fusion surfaces of the two gripped pipe members are pressed against the heating element to melt them, and then the heating element is removed. In the fusing machine in which the clamps are relatively slid to the other clamp side to press and fuse the fusion surfaces of both pipe members, both clamps have a maximum diameter of the fusion-bonded material. Arrangement A clamp body having a gripping space into which materials can be inserted, and a clamp body provided so as to surround the gripping space, with its tip supported by the clamp body so as to be able to advance and retreat from the periphery of the gripping space toward the center of the gripping space. And a plurality of rods, each of which has a tip that abuts on a peripheral wall of the pipe material and grips the pipe material by advancing into the gripping space, wherein each rod keeps the distance between the tip and the center of the gripping space at all equal distances. It is configured to move forward and backward while interlocking.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail with reference to the drawings. FIG. 1 and FIG. 2 show a first embodiment of a fusing machine according to the present invention.

As shown in FIGS. 1 and 2, the welding machine A includes a gantry (clamp base) 1 and two clamps 2.
And a heater face 3 as a heating element. The gantry 1 is provided with two guide rails (linear guides) 11 parallel to the longitudinal direction on both sides in the width direction, and an attachment portion 12 for the heater face 3 at the center in the longitudinal direction.

The clamp 2 includes a base 4 and a clamp body 5 as shown in FIGS. The base portion 4 is supported by two guide rails 11 of the gantry 1 so as to be freely slidable in the longitudinal direction, and has a handle 41 provided to protrude from one side of the gantry 1 as shown in FIG. By rotating, it slides in conjunction with the heater face 3 direction.

As shown in FIGS. 3 to 5, the clamp body 5 is provided so as to sandwich four rods (clamp chips) 51, a support substrate 52 for these rods 51, and the support substrate 52 from both sides. And two rotating disks 53
Rotating mechanism 54, two rotating disks 53 and supporting substrate 5
And a cover 55 provided so as to include the inside 2 inside, and a holding space S is provided at the center. Gripping space S
Is formed in such a size that the pipe material having the largest diameter among the pipe materials P to be fused can be inserted.

The support substrate 52 has a cutout 52 so that a pipe material to be fused into the holding space S can be inserted from above.
As shown in FIG. 5, the outer peripheral portion has a disk shape with a flange 52b projecting to both sides at the peripheral edge thereof, and four guide grooves 52c are formed in the disk. Four guide grooves 52c
Are the upper two with respect to the horizontal plane passing through the central axis of the support substrate 52.
The two guide grooves 52c are provided radially toward the center axis of the support substrate 52 at an angle of 30 ° and the lower two guide grooves 52c at an angle of 45 ° with respect to the horizontal plane.

As shown in FIG. 7, the rod 51 is fitted into the guide groove 52c so that its tip 51a can freely move into and out of the gripping space S, and a guide roll (cam follower) is provided at the back of the guide groove 52c. ) 51b. The two rotating plates 53 are provided so as to sandwich the support substrate 52 from both sides in a state of being inserted into the inside of the flange portion 52b of the support substrate 52, and a pipe member to be fused like the support substrate 52. Is partially cut out to the center so that it can be inserted into the center as described later.
d.

Each of the rotary disks 53 has a worm gear 53a formed on the periphery thereof, and two cam grooves (inner cams) 53b are formed in the disk surface, respectively. The guide roll 51b of the rod 51 is rotatably fitted. Each cam groove 53
b is an approximate Archimedes spiral (origin given by the equation of r = aθ in polar coordinates, that is, a curve wound around the center axis of the support substrate 52), and the cam groove 53b of one of the rotary disks 53 is formed. And the cam groove 53b of the other rotary disk 53 are formed symmetrically with respect to the vertical center line of the support substrate 52.

As shown in FIG. 6, the rotation mechanism 54 has two worm shafts 54a. Both worm shafts 54a
As shown in FIG. 3, FIG. 4 and FIG. 6, the worm gear 53a of the turntable 53 corresponding to the worm portion 54b is provided in parallel below the turntable 53 so as to mesh with the worm portion 54b, and is provided at one end. The gears are connected via two gears 54c, and are rotated in conjunction with each other by rotating a knurled handle 54d provided at the other end of one worm shaft 54a.

As shown in FIG. 6, the cover 55 has its peripheral edge fixed to the flange 52b of the support substrate 52 by screws from both sides, and surrounds the support substrate 52, the rotating plate 53 and the rotating mechanism 54 from both sides. In addition, a notch 55a partially cut out to the center is provided so that the pipe member P to be fused like the support substrate 52 can be inserted into the center as described later. That is, when the clamp body 5 rotates the knurled handle 54d, 2
Each of the worm shafts 54a rotates in the opposite direction, and accordingly, the two rotating disks 53 also rotate in the opposite directions.

Since the guide roll 51b of each rod 51 is fitted in the cam groove 53b, the rod 51 is moved along the guide groove 52c via the guide roll 51b as the cam groove 53b rotates. The rod 51 projects into and out of the grip space S toward the center of the grip space S. In addition, all the rods 51 come and go in conjunction with each other while keeping the distance between the tip 51a and the center of the holding space S all equal. As shown in FIG. 8, the mounting portion 12 is configured such that the mounting portion main body 12a to which the heater faces 3 having different sizes can be attached and detached is mounted on the gantry 1 via the hinge 12b.
Is rotatably supported.

The fusing machine A is capable of fusing pipe materials in the following manner. First, as shown in FIG. 3, the rod 51 is set so that its tip end 51a does not protrude into the holding space S, and the notches 52a, 53d, 55a
After the pipe material P to be fused is brought into the holding space S through the knurl, the knurled handle 54d is rotated,
As shown in FIG. 4, the distal end portion of the rod 51 is advanced into the gripping space S into the gripping space S, and the distal end surface of each rod 51 is brought into contact with the peripheral surface of the pipe material P. The piping material P is gripped.

Next, after the heater face 3 corresponding to the diameter of the pipe material P is mounted on the mounting portion main body 12a, the mounting portion main body 12a is rotated about the hinge 12b to be fixed between the two clamps 2. . Then, with the heater face 3 being heated, the clamps 2 are slid on the guide rail 11 toward the heater face 3, and the fused surface of the pipe material P gripped by the clamps 2 is heated by the heater face 3.
After that, the two clamps 2 are retracted from the heater face 3.

Next, after the heater face 3 is removed from between the two clamps 2 by rotating the mounting portion main body 12a, the two clamps 2 are slid in a direction approaching each other, so that the fusion surfaces of the pipe materials P are fused. Are adhered to each other to fuse the two pipe members P together.

In this fusion machine A, as described above, the clamp 2 can clamp the pipe material P only by causing the rod 51 to advance into the holding space S, and
Since the degree of advance 1 can be steplessly adjusted by adjusting the degree of rotation of the turntable 53 by operating the knurled handle 54d, it is not necessary to exchange attachments even when fusing pipe materials of different sizes. is there. Therefore, the working time can be reduced and the size of the fusion machine itself can be reduced as compared with the conventional fusion machine.

Further, since all the rods 51 move in and out so as to make the distance between the rod tip and the center of the holding space all the same, the tip of all the rods 51 becomes the outer periphery of the pipe material P. Hit the surface evenly. Therefore, there is little axis deviation between the pipe members and the deformation of the pipe members. FIG.
In FIG. 2, reference numeral 12 c denotes a positioning rod that contacts the clamp 2 when pressing the pipe material P against the heater face 3 and positions the clamp.

FIG. 9 shows a second embodiment of the fusion machine according to the present invention. As shown in FIG. 9, in the welding machine B, the clamp body 7 has a donut-shaped substrate 71 having a gripping space S at the center, and a symmetrically provided one end of the substrate 71 and a pivotal shaft 72a. It has four arm rods 72 of the same length freely supported by a shaft, and an operation ring 73.

The pivot shaft 72 of each arm rod 72
a of the operation ring 73
Is engaged with the rack 73a provided on the inner peripheral surface of the
By rotating the operation ring 73, each arm rod 72 rotates around the pivot shaft 72a,
Except that the other end 72c, which is the tip of the pipe member, advances into the holding space S and abuts against the outer peripheral surface of the pipe member P inserted into the holding space S to hold the pipe member P. Landing machine A
Is similar to

FIG. 10 shows a third embodiment of the welding machine according to the present invention. As shown in FIG. 10, the fusing machine C is similar to the fusing machine A except for the following configuration.

That is, in the fusing machine C, the clamp body 8 has a donut-shaped support substrate 81 having a holding space S at the center, and a guide groove (not shown) provided in the support substrate 81. And three radially provided rods 82 that are fitted into the gripper so that their tips can freely move into and out of the holding space S, and a turntable 83 provided along one side surface of the support substrate 81. I have. Then, a roll 82a provided at the rear end of the rod 82 is fitted into the cam groove 83a of the rotating disk 83, and by rotating the rotating disk 83 with the handle 84, the roll 82a is pressed by the wall surface of the cam groove 83a. The rod 82 advances into the holding space S to hold the pipe material P, and the ratchet mechanism 8
5 allows the holding state to be maintained.

The fusing machine according to the present invention is not limited to the above embodiment. For example, in the above embodiment,
The two clamps 2 slide along the rails 11 of the gantry 1 by rotating the handle 41. However, the clamps 2 may be slid hydraulically or manually.

In the above embodiment, both clamps 2 are slid, but only one clamp 2 may be slid. Further, the heating element may slide in the clamp direction. In the fusing machine C, a spring that always urges the rod 82 in the direction of retreating from the holding space S may be mounted.

[0030]

Since the welding machine according to the present invention is constructed as described above, there is no need to replace the attachment or the like, and there is little misalignment between the pipe members and the deformation of the pipe members. The workability is excellent, and the size of the welding machine itself can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of a fusing machine according to the present invention.

FIG. 2 is a plan view of the welding machine of FIG.

FIG. 3 is a front view of the clamp of the welding machine of FIG. 1 in a state before gripping a pipe material.

FIG. 4 is a front view of the clamp of the welding machine of FIG. 1 in a state after gripping a pipe material.

FIG. 5 is a partially cutaway plan view of the clamp body of the welding machine of FIG. 1;

FIG. 6 is a plan view of a rotation mechanism of the welding machine of FIG. 1;

FIG. 7 is a sectional view taken along line XX of FIG. 3;

FIG. 8 is a front view of a mounting portion of a heater face of the welding machine of FIG. 1;

FIG. 9 is a cutaway front view of a clamp of a fusion machine according to a second embodiment of the present invention.

FIG. 10 is a cutaway front view of a clamp, showing a third embodiment of a welding machine according to the present invention.

[Explanation of symbols]

 A, B, C Fusing machine 1 Mount 2 Clamp 3 Heater face (Heating body) 5, 7, 8 Clamp body 51, 72, 82 Rod 51a Tip 72c The other end (tip)

Continued on the front page (72) Inventor Keiji Mihara 75 Nojiri, Ritto-cho, Kurita-gun, Shiga Prefecture Inside Sekisui Pipe Materials and Technics Co., Ltd. F term (reference) 4F211 AG08 TA01 TC11 TD07 TJ14 TJ22

Claims (1)

[Claims] 1. Two clamps for holding two pipe members to be welded so that their fused surfaces face each other.
At least one of the clamps was slidably supported by the gantry in the other clamp direction, and the heating element was detachable at a mounting position between the pipe members gripped by both clamps, and the heating element was mounted. In this state, both clamps are relatively slid toward the heating body, and the fusion surfaces of the two gripped pipe members are pressed against the heating bodies, respectively, and then melted. Then, the heating body is removed, and one clamp is removed from the other. In the fusing machine that slides relatively to the clamping side of the pipe and presses the fusing surfaces of both pipes together to fuse them, both clamps insert the pipe material of the largest diameter to be fused. A clamp body having a possible holding space, and a clamp body provided so as to surround the holding space, and having a tip that can move forward and backward from the periphery of the holding space toward the center of the holding space. And a plurality of rods, each of which has a tip that abuts on a peripheral wall of the pipe material and grips the pipe material by advancing to the gripping space, wherein each rod has an equal distance between the tip and the center of the gripping space. A fusing machine characterized in that it keeps moving forward and backward while keeping it.