JP2736407B2 - Fusion jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding jig for adjusting a relative position of a plastic pipe to be joined by using an electrofusion joint (hereinafter referred to as "EF joint").

[0002]

2. Description of the Related Art As a method of joining plastic pipes used for water supply and sewage and gas piping, there is a method using an EF joint. As is well known, an EF joint has a heating wire embedded in a contact surface of the same plastic joint as the pipe with the pipe, and by supplying electricity to the heating wire, the resin on the contact surface is heated and melted mutually. Then, the pipe and the joint are fused. There has been a technique for positioning a pipe using a welding jig so that the relative position of the pipes to be joined at the time of the welding operation is not deviated.

[0003]

Conventional jigs for welding use dedicated jigs corresponding to the joining direction and number of pipes and the pipe diameter, that is, the type of joint, and therefore have a jig for each type and size of joint. And forced plumbers to carry it, and this is the case now.

[0004] It is an object of the present invention to provide a versatile welding jig capable of coping with several types of EF joints.

[0005]

In order to achieve the above object, a welding jig according to the present invention comprises a plastic pipe (P) joined by using an electrofusion joint (J).
1) In the welding jig for adjusting the relative position of (P2), the vicinity of the insertion portion of the plastic pipe (P1) inserted into one side of the joint (J) is horizontally supported by a V-shaped upper surface (1). 1 jig (2) and a second jig (3) for horizontally supporting the vicinity of the insertion portion of another plastic pipe (P2) to be inserted into the other side of the joint (J) with a V-shaped upper surface (1). And the first and second jigs (2) and (3)
Each jig (2) is connected by a connecting rod (5) that can be adjusted to each other.
In (3), one end of the tightening chain (14) is detachably engaged.
Hook (16) to stop, the chain (14) and others
Turn the nut (17) connected to the bolt (13) at the end
The screwing part (15) to be attached to the bearing body (18)
Of pipes (P1) (P2) corresponding to various pipe diameters
First and second jigs having a chain tightening mechanism.
(2) Divided into one or both of (3)
The movable jig (3a) at the center is raised via bolts (26).
A pie that can be adjusted to the lower position and is compatible with various pipe diameters.
Pipe support height adjustment to maintain the proper support height of the pipe (P2)
It has a knot mechanism.

[0006]

[Work] When two plastic pipes are joined in one direction with an EF joint such as a socket, a T, a cloth, etc., each pipe is attached to the first and second jigs, and each pipe is fused. The deviation of the tube axis direction and the tube axis center can be prevented (alignment). The type (shape, size) and size (tube diameter) of the EF joint are adjusted by adjusting the interval between the first and second jigs and adjusting the length of the tightening body of the tightening mechanism.
In addition to the centering of the pipes, the pipe supporting height can be adjusted to cope with various EF joints having different diameters.

Further, in order to achieve the above object, a second welding jig of the present invention is a plastic pipe (P1) joined by using an electrofusion joint (J).
(P2) In the welding jig for aligning the relative positions of (P3), the vicinity of the insertion portion of the plastic pipe (P1) to be inserted into one side of the joint (J) is filled with water using a V-shaped upper surface (1).
A first jig (2) for flat support and a second jig for supporting near the insertion portion of another plastic pipe (P2) to be inserted on the other side of the joint (J) with a V-shaped upper surface (1). Jig (3)
And a plastic pipe (P1) (P) attached to one or both of the first and second jigs (2) and (3).
2) Another plastic pipe (P) perpendicular to the pipe axis
A third jig (4) for supporting the vicinity of the insertion portion of (3) with a V-shaped upper surface (1), and a first and a second jig (2).
The third jig (4) is connected to the longitudinal direction of the first connecting rod (5) by connecting the third jig (4) to the first connecting rod (5).
One end of a second connecting rod (6) connected so as to be movable and adjustable in the angular direction
To each jig (2), (3) and (4).
Latching part that locks one end of the housing (14) in a detachable manner.
(16) and a bolt (13) at the other end of the chain (14).
Nut (17) rotatably connected to the bearing (18)
With a fitting part (15) to be attached to
Chain tightening of the corresponding pipe (P1) (P2) (P3)
First to third jigs (2)
(3) In any one or two or all of (4),
Bolt the movable jig (3a) (4a) at the divided center
(26) The position is fixed so that it can be adjusted up and down freely.
Appropriate supporting height of pipe (P2) (P3) corresponding to pipe diameter
It has a pipe support height adjustment mechanism that holds two plastic pipes at right angles with an EF joint such as a socket, a 90 ° elbow, a 90 ° bend, a T, a cloth, or a unidirectional joint. When joining two plastic pipes at right angles to another plastic pipe, connect each pipe to the first or second jig and the third jig,
Alternatively, by attaching to the first to third jigs and performing the fusion work, it is possible to prevent deviation (alignment) of the direction of the pipe axis and the pipe axis of each pipe. The third to the first and second spacing adjusting and first and second jigs jigs
By adjusting the relative position of the jig and adjusting the length of the tightening member of the first to third jig tightening mechanisms, the pipes are centered in accordance with the type (shape, size) and size (tube diameter) of the EF joint. By adjusting the pipe support height, the pipes can be centered in correspondence with various EF joints having different diameters.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall side view of a welding jig, and FIG. 2 is a plan view of the same. A plastic pipe (P1) (P2) (P3) to be joined using an EF joint (J) is horizontally placed on a V-shaped upper surface (1). V-block-shaped first to third jigs (2), (3), (4) to be supported and first to third jigs (2), (3), (4) to interconnect these first to third jigs (2), (3), (4) The first jig (2) is provided with a second connecting rod (5) (6) and supported on the first jig (2) horizontally by the V-shaped upper surface (1). The connecting rod (5) is fitted and a flange (5) integrally provided on one end surface of the first connecting rod (5).
a) A second jig (3) is fixed to the first jig (3) with a bolt (7).
The pipe (P) having a pipe axis in the same direction as the pipe axis of the pipe (P1) horizontally supported on the V-shaped upper surface (1) of the jig (2)
2) is supported by the V-shaped upper surface (1) of the second jig (3), and the second jig (3) is moved toward and away from the first jig (2). The second jig (2) and the second jig (3) are configured to be connected to the first jig (2) by the first connecting rod (5) so that the distance between the jigs is adjustable. ing.

The first and second jigs (2)
A second connecting rod (6) is superposed at right angles on the lower surface side of the first connecting rod (5) between (3), and the overlapping portion is tightened with two sets of bolts and nuts (8) and (9). A third jig (4) is fixed to a flange (6a) integrally provided on one end surface of the second connecting rod (6) with a bolt (10), and the first and second jigs are fixed.
A plastic pipe (P3) having a pipe axis perpendicular to the pipe axes of the pipes (P1) and (P2) supported horizontally on the V-shaped upper surface (1) of the jigs (2) and (3) is a third jig (4). The third jig (4) is attached to the first and second jigs (2) and (3) by the first and second connecting rods (5) and (6) in a posture supported by the V-shaped upper surface (1). It is configured to be connected.

Further, a bolt hole (11) through which each set of bolts (8) passes is inserted into the first connecting rod (5), and a first connecting rod (5) to which a second jig (3) is fixed. A plurality of bolts (8) are provided in a row at equal intervals at about half of the entire length from the end of the bolt, and each set of bolts (8) is passed through the second connecting rod (6) with its head embedded and fitted. An attached bolt hole (12) is formed in a long hole along the side edge of the second connecting rod (6), and the mounting position of the second connecting rod (6) to the first connecting rod (5) is adjusted. The first connecting rod (5) can be adjusted in several steps and the length of the second connecting rod (6) at each mounting position can be adjusted steplessly. And the relative position of the third jig (4) with respect to the first and second jigs (2) and (3) is changed to the V-shaped upper surface (1) of the first and second jigs (2) and (3). Pipe (P1) (P2) supported by A tube axis direction to adjustably configured in the tube axis perpendicular to the tube axis direction. In addition, the first connecting rod (5)
Bolt hole (11) is formed in a long hole, and the second connecting rod (6)
May be provided with a plurality of bolt holes (12).

FIGS. 3 and 4 show the first jig (2).
FIGS. 5 to 8 show second and third jigs (3) having the same structure.
(4) is shown.

The first to third jigs (2), (3) and (4) are provided with a pipe (P1) (P2) (P3) tightening mechanism, and a tightening chain (1) is provided with a bolt (13) at one end. 14) and the threaded portion (1) of the bolt (13) provided on the left side surface of the first to third jigs (2), (3) and (4).
5) and a locking portion (16) of the chain (14) provided on the right side surface of the first to third jigs (2), (3) and (4), and the tightening mechanism is constituted, and the screw portion ( 15)
A bearing body (18) rotatably mounted with a knob nut (17) for vertically screwing a bolt (13) downward from above.
Are fitted and fixed in the upper part of the vertical groove (19) having a U-shaped cross section formed on the left side surface of the first to third jigs (2), (3) and (4), and the latching part (16) is A pair of stopper plates (21) provided on the lower edge thereof with an inverted U-shaped engagement groove (20) for engaging both ends of the chain pin (14a) of the chain (14) with the first to third jigs ( 2) A vertical groove (22) formed on the right side surface of (3) and (4) is provided so as to be opposed to a middle side wall of the vertical groove (22), and an end of the bolt (13) is screwed into the screwed portion (15).
The nut (17) is screwed into the nut (17) from above by rotating the nut (17), and the chain (14) is wound from above onto the outer surface of the pipes (P1), (P2) and (P3) placed on the V-shaped upper surface (1). After hooking the end of the chain (14) to the latching portion (16) via the chain pin (14a) and the engaging groove (20), the nut (17) of the screwed portion (15) is further attached. Rotate this nut (1
The bolt (13) is screwed downward into 7), and the slack of the chain (14) is removed and tightened, whereby the first to third jigs (2), (3) and (4) have V-shaped upper surfaces (4). The pipes (P1), (P2), and (P3) are tightened to 1).

Further, the engaging groove (2) of the latch portion (16) is provided.
The length of the chain (14) is adjusted by appropriately selecting the chain pin (14a) to be fitted into the chain (0), and the first to third jigs (2) are adjusted by adjusting the length of the chain (14).
(3) Pipe (P) supported on the V-shaped upper surface (1) of (4)
1) It is configured so that tightening can be performed according to the difference in the pipe diameter of (P2) and (P3).

The first to third jigs (2) and (3)
On the left side surface of (4), a vertical groove (1) is formed below the bearing body (18).
A nut knob (17a) formed with a transverse groove (23) having a U-shaped cross section orthogonal to 9) and disposed below the bearing body (18).
Of the nut knob (17a) is prevented from interfering with the first to third jigs (2), (3) and (4).

As shown in FIG. 5 to FIG.
The jigs (3) and (4) are provided with a pipe support height adjusting mechanism for partially lifting the central portion of the V-shaped upper surface (1) upward and holding the lifting. Movable jigs (3a) and (4a) provided by dividing and forming solid portions between the vertical grooves (19) and (22) on the left and right side surfaces of the jigs (3) and (4) only in the vertical direction; The movable jig (3a) (4a) from the front of the third jig (3) (4)
And a fixing bolt (26) with a knob (26a) for fixing the position of the movable jig (3a) (4a) which is screwed into a screw hole (24) provided at the lower end side central part through a vertically long hole (25). The pipe support height adjusting mechanism is configured, and the knob (26
a) is turned in the loosening direction to loosen the tightening of the contact surface (27) against the front surface of the second to third jigs (3) (4) of the fixing bolt (26), and within the range of the long hole (25). Movable jig (3
a) Lift (4a) and, in its raised position, turn knob (26).
a) is turned in the tightening direction to tighten the contact surface (27) of the fixing bolt (26) to the front of the second to third jigs (3) and (4) to fix the movable jigs (3a) and (4a) in position. Thereby, the central part of the V-shaped upper surface (1) of the second to third jigs (3) and (4) is partially lifted, and pipes of different diameters are removed from the first to third jigs (2) and (3). The V-shaped upper surface (1) of (4) can be supported at the same height (the center of the pipe diameter). In addition, the movable jig (3
a) It is preferable to provide a display means such as a scale indicating a height position at which (4a) is lifted on the front surface of the second to third jigs (3) and (4).

The second and third jigs (3)
The first and second connecting rods (5) are provided at the four corners on the back of (4).
A screw hole (28) for attaching a bolt (7) to the flange (5a) (6a) of (6) is provided.

As shown in FIGS. 3 and 4, a guide hole (29) is provided in the center of the solid first jig (2) so that the first connecting rod (5) can be freely moved forward and backward. At the same time, a screw hole (30) penetrating the guide hole (29) from the back surface of the vertical groove (22) on the right side of the first jig (2) is provided, and a fixing bolt (31) screwed into the screw hole (30). The first jig (2) restricts the sliding of the first connecting rod (5) with respect to the first jig (2), and the distance between the first and second jigs (2) and (3) is fixed.

The method of using the welding jig configured as described above will be described below.

As shown in FIGS. 1 and 2, when three pipes (P1), (P2) and (P3) are joined by a T-shaped EF joint (J), each of the insertion ports of the EF joint (J) is connected to each of the insertion ports. After inserting the joining ends of the pipes (P1), (P2) and (P3) and setting them in the joining state, the pipes (P1) having the same axis as the pipe axis
The first and second jigs (2) and (3) are arranged close to the outside of the insertion port of the EF joint (T) into which (P2) is inserted, and the first and second jigs (2) and (3) 3) The pipes (P1) and (P2) are placed on the V-shaped upper surface (1) and tightened by a tightening mechanism, and the pipes (P1) and (P2) are tightened.
A third outside is inserted into the insertion port of the EF joint (T) into which the remaining pipe (P3) having a pipe axis perpendicular to the pipe axis of the EF is inserted.
The jigs (4) are placed close to each other, and the pipe (P3) is placed on the V-shaped upper surface (1) of the third jig (4), and each pipe (P) is tightened by a tightening mechanism.
1) The alignment of (P2) and (P3) is performed and positioning is performed. In this state, the pipe (P1) (P
2) Supply electricity to a heating wire (not shown) embedded in the contact surface with (P3), mutually heat and melt the resin on the contact surface, and connect each pipe (P1) (P2) (P3) with a joint ( By performing the fusion of J), the relative positions of the pipes (P1), (P2), and (P3) are deviated when the resin is heated and melted (center misalignment).
Can be prevented.

The distance between the first and second jigs (2) and (3) and the third to the first and second jigs (2) and (3) depend on the shape and size of the T-shaped EF joint (J). The first to third jigs (2), (3) and (4) are first and second connecting rods (5) so that the relative position of the jig (4) can be adjusted.
Since they are interconnected by (6), the welding jig can be used for T-shaped EF joints (J) of various sizes by the first to third position adjustments.
Pipes (P1), (P2), and (P3) having different diameters for various sizes of the joint (J) can be properly tightened by adjusting the length of the tightening chain (14).

In the case of a T-shaped EF joint having a different diameter, a pipe having a large diameter is connected to the first and second jigs (2) and (3).
And a pipe having a small diameter is attached to the third jig (4), and the heights of the pipe axes of the large diameter pipe and the small diameter pipe are adjusted to the movable jig (4) of the third jig (4).
a) can be advanced by lifting the V-shaped upper surface (1) that supports the small diameter pipe, and the welding jig can also be used for a T-shaped EF joint of a reduced diameter. That is, a pipe having the largest diameter is attached using the first jig (2) as a reference jig, and another pipe is attached using the other second to third jigs (3) and (4) as adjustment jigs. .

On the other hand, in the case of the socket type and the socket type EF joint of a different diameter, the first and second jigs (2)
Using (3), center the two pipes with the same axis in the pipe axis, and use the 90 ° elbow and 90 ° bend type, and the 90 ° elbow and 90 ° bend of different diameter in the case of 90 ° bend. Using the first jig (2) and the third jig (4) or the second jig (3) and the third jig (4), center the two pipes whose pipe axes are perpendicular to each other, and The first and second jigs (2) in the case of the cross-shaped EF joints of different shapes and diameters, similarly to the socket type and the socket-shaped EF joints of different diameters
After the centering of two pipes having the same direction is performed using (3), the remaining two tube axes are similarly centered in the same direction.

The pipe fastening mechanism of the welding jig may have a structure in which a rubber band having an adjustable length is hooked on the left and right side surfaces of the first to third jigs (2), (3) and (4). The first and second connecting rods (5) and (6) are connected by a set of fulcrum shafts (bolts) and nuts, and the bolt holes of the first and second connecting rods (5) and (6) are provided. Are formed in the elongated holes, and the second connecting rod (6) is connected to the first connecting rod (5) so as to be able to move back and forth, right and left, and rotate, so that 90 °
Other EF joints such as elbows, bends, and Y can be used.

[0024]

As described above, the present invention has the following advantages.

According to the first aspect of the present invention, when two plastic pipes are joined in one direction by an EF joint such as a socket, a T, a cloth, or the like, and an EF joint having a different diameter thereof, each of these plastic pipes has First alignment
In addition, this can be performed by using the second jig, and the versatility of the welding jig can be provided.

According to the present invention as set forth in claim 2, claim 1 is provided.
90 ° in addition to the EF joint that can be used with the welding jig described
The welding jig can be used for elbows and 90 ° bends and can be used in a wider range.

[Brief description of the drawings]

FIG. 1 is an overall side view of a welding jig.

FIG. 2 is an overall plan view of the welding jig.

FIG. 3 is a plan view of a first jig.

FIG. 4 is a sectional view of a first jig.

FIG. 5 is a plan view of the second and third jigs.

FIG. 6 is a cross-sectional view of the second and third jigs.

FIG. 7 is an exploded plan view of the second and third jigs.

FIG. 8 is an exploded cross-sectional view of the second and third jigs.

[Explanation of symbols]

 (J) EF joint (P1) (P2) (P3) Plastic pipe (1) V-shaped upper surface (2) (3) (4) First to third jigs (5) (6) First and second (14) Tightening chain (tightening mechanism) (3a) (4a) Movable jig (pipe support height adjusting mechanism)

Claims (2)

(57) [Claims] 1. A fusion jig for adjusting the relative positions of plastic pipes (P1) and (P2) to be joined using an electrofusion joint (J).
A first jig (2) that horizontally supports the vicinity of the insertion portion of the plastic pipe (P1) inserted on one side of the joint (J) with another V-shaped upper surface (1), and another plastic pipe (P2) inserted on the other side of the joint (J). And a second jig (3) for horizontally supporting the vicinity of the insertion portion on the V-shaped upper surface (1) .
Connecting jig and the second jig (2) (3) are adjustable
(5) Connect the jigs (2) and (3)
Latching part that locks one end of the housing (14) in a detachable manner.
(16) and a bolt (13) at the other end of the chain (14).
Nut (17) rotatably connected to the bearing (18)
Threaded part (15) to be attached to
The chain tightening mechanism for the corresponding pipe (P1) (P2)
Having the first and second jigs (2) and (3)
The movable jig in the central part is divided into one or both
Position (3a) can be adjusted up and down via bolts (26)
Fixing the pipe and appropriate pipe (P2) corresponding to various pipe diameters
A welding jig, characterized by having a pipe support height adjusting mechanism for holding the pipe at a support height . 2. A plastic pipe (P1) (P2) (P) to be joined using an electrofusion joint (J).
In the welding jig for adjusting the relative position of 3), a plastic pipe (P1) inserted into one side of the joint (J).
A first jig (2) that horizontally supports the vicinity of the insertion portion of the joint with the V-shaped upper surface (1), and the vicinity of the insertion portion of another plastic pipe (P2) to be inserted into the other side of the joint (J) is the V-shaped upper surface ( The pipe shaft of a plastic pipe (P1) (P2) attached to a second jig (3) supported by 1) and one or both of the first and second jigs (2) and (3) And a third jig (4) for supporting the vicinity of the insertion portion of the other plastic pipe (P3) in a direction perpendicular to the V-shaped upper surface (1), and the first and second jigs (2) and (3) are provided. A third jig (4) is connected by a first connecting rod (5) having an adjustable mutual interval.
Can be moved and adjusted in the direction perpendicular to the longitudinal direction of the first connecting rod (5).
Fixed to one end of a second connecting rod (6) connected to
(2) (3) (4) one end of the tightening chain (14)
A latching portion (16) for removably engaging the lock;
Nut (1 ) connected to the bolt (13) at the other end
Threaded part for mounting 7) to bearing body (18) rotatably
(15) to provide pipes (P
1) With the (P2) (P3) chain tightening mechanism
Any one of the first to third jigs (2), (3), and (4)
One or two or all divided movable central part
Adjust jigs (3a) and (4a) up and down via bolts (26)
Pipes that can be freely fixed and correspond to various pipe diameters
(P2) Pipe support to maintain the proper support height of (P3)
A welding jig having a height adjusting mechanism .