JPH1177556A - Joining tool for pipe and bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability, and to miniaturize and lighten a joining tool by facilitating the alignment of a joined body with a joining body, engaging them by firmly clamping and holding them stably. SOLUTION: A single operable stationary clamper 6 is provided to one end of a supporting frame 5, and a movable and single operable clamper 8 is provided to the other end in such a way that it is oscillatable around a pivot 16 through a movable supporting stem 7, and movable back and forth with respect to the stationary clamper 6, an intermittent feeding means 9 and locking means 10 of the movable supporting stem 7, are provided at the other end of the frame 5 opposing to the movable clamper 8, and by operating an operation lever 43 of the feeding means 9, the movable clamper 8 is allowed to advance in the direction approaching to the stationary clamper 6 through the movable supporting stem 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for connecting pipes, rods, and the like in a male-female fitting relationship.

[0002]

2. Description of the Related Art In general, when connecting the same kind of pipe to the pipe end of a synthetic resin hard pipe directly or through a pipe joint in various piping works, an adhesive property is applied to a male and female fitting surface. After fitting, it is necessary to fix the bonded pipe to the pipe to be bonded so as not to move until the adhesive property is solidified and bonding is completed.

[0003] Also, since pipe joining requires watertightness or airtightness, the fitting tolerance is relatively small, and therefore, a considerably large insertion force is required for inserting and fitting a pipe. Conventionally, various types of joining tools have been proposed (for example,
See Japanese Patent No. 2582712). The tool disclosed in this patent publication is for forcibly fitting an insertion leg of a joint into a pipe end of a synthetic resin hard pipe, and a holder for holding the pipe joint in an immobile state is provided with a reciprocating saw tooth. Attach to one end of the rod, attach a clamper holding the hard pipe to the main body case, provide the main body case with an advanceable / retractable rod, and drive the ratchet claw provided in the main body case with the lever handle to retract the advance / retreat rod. Thus, the holder is moved toward the hard pipe held by the clamper, and the insertion leg is forcibly pushed into the hard pipe.

[0004]

However, the above-mentioned prior art is not suitable for joining pipes, and there is a problem in stability when joining pipes having a large size or weight. It is difficult, and there are problems such as troublesome operation and poor workability. The present invention has been made in view of the above situation, and its purpose is to
It is easy to align the workpiece and the workpiece, and it can adapt to various sizes and conditions. An object of the present invention is to provide a joining tool such as a pipe and a rod that can be reduced in size and weight.

[0005]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention provides a support frame, a fixed clamper removably fixed to an object to be joined provided at one end of the frame, and a movable member that is movable longitudinally to the other end of the support frame and approaches the fixed clamper. A movable support rod provided detachably, a movable clamper removably fixed to a joint provided coaxially with the fixed clamper on the fixed clamper side of the support rod, and a movable clamper opposite to the other end of the frame. And a movable support rod feeding means mounted on the side and a movable support rod locking means having an unlocking function.

According to the present invention, when an object to be joined is an elbow joint pipe fixed to a lower end of a vertical pipe, and a resin pipe as a joined body is horizontally joined to the elbow joint pipe, the movable clamper is located at a retreat limit. In this state, the end of the joint pipe is clamped by a fixed clamper, and after applying an adhesive to the outer peripheral surface of the end of the resin pipe, the centering of the joint end of the resin pipe as close as possible to the end of the joint pipe In this state, the resin tube is clamped and held by a movable clamper.

[0007] Next, the movable support tube is advanced by operating the feeding means toward the fixed clamper together with the movable clamper, and the resin tube is inserted into the joint tube opening. When the resin pipe is inserted into the joint pipe by a required dimension, the movable support rod stops and is locked on the support frame by the feeding means and the movable support rod locking means, and the state is maintained. Do not move from that position. Therefore, the resin pipe is held in a state of being inserted into the joint pipe by a required size.

After the insertion of the resin pipe, when the time for the adhesive to solidify and complete the bonding has elapsed, the clamps of the joint pipe and the resin pipe are released by operating the fixed clamper and the movable clamper, and the tool is connected to the joint pipe and the resin pipe. The pipe joining operation is completed by removing the pipe from the resin pipe. The movable clamper is
By releasing the locking of the movable support rod by the locking means, the movable support rod can be retracted to the retreat limit.

As described above, the insertion fitting can be easily and surely performed, and the fitting state can be stably maintained for a required time, so that accurate, reliable, and strong joining can be performed. In the present invention, the pivot of the fixed clamper may pass through the hollow pivot of the movable clamper, and the movable support rod may be hollow, and the pivot may be slidably inserted into the hollow. In this case, the movable clamper can be guided by the pivot, and can be smoothly inserted and fitted while maintaining the state where the axes of both clampers, that is, the center of the joined body such as the joint pipe and the joined body are aligned, and the workability is improved. improves.

Further, according to the present invention, the clamper can be swung about a pivot, whereby the center of the joined body with respect to the joined body can be easily and reliably performed. Further, according to the present invention, the fixed and movable clampers include a first member having an arc-shaped clamp portion on one side and a handle portion on the other side, and a clamp holding on the other side having an arc-shaped clamp portion on one side. A second member having a portion, a pivot for pivotally attaching the two members so as to be relatively rotatable, an urging means such as a spring for urging the clamp portions of the two members to face inward, and a handle portion of the first member. A pair of front and rear second member locking fixed bars pivoted by a pin parallel to the pivot, and a clamp holding unit locking having an operation handle rotatably attached to an end bar of the fixed rod by a pin parallel to the pin. And a pressing cam.

In this case, when the cam which has operated the operating handle is disengaged from the clamp holding portion, the opposing clamp portions are urged inwardly by the urging means. Alternatively, by forcibly pushing the joined body, the space between the two clamp portions expands against the urging force of the urging means, and this can be easily inserted. In this way, when the object to be joined or the joined object is inserted into both clamped officers, the operation handle is pushed to the clamp portion side to position the cam outside the clamp holding portion, and the operation handle is turned to the handle portion side to rotate the cam. Is rotated, the clamp holding portion is locked and fixed by the cam via the second member locking and fixing rod, the joined body or the joined body is clamped and fixed by the respective clamp portions, and the state is maintained. Is done.

The work of clamping the joined object or joined object by the clamper can be performed by one-touch operation with one hand of an operation handle. When releasing the clamp, the locking of the clamp holding portion by the cam can be released by rotating the operation handle in a direction away from the opposing handle portion. By pulling in the direction, the cam separates from the clamp holding portion and the restraint is completely released.

When the clamp holding part is released, the clamping part is opened by pulling the tool in a direction away from the workpiece and the joined body or by its own weight, and both clampers are moved from the workpiece and the joined body. Can be separated and easily removed. Also, the present invention is characterized in that the feeding means includes a casing having a handle attached to the end of the frame, a forward drive operating lever pivotally connected to the handle of the casing by a short axis, and a movable support rod. A feed piece having an engagement hole to be fitted therein and pushed in the frame direction by the tip of the operation lever, and a retraction return spring and an operation lever return spring of the feed piece are provided. it can.

[0014] With this configuration, since the feed piece is constantly pressed against the tip of the lever by the retraction return spring,
When the lever is driven and one end of the feed piece is pushed to the movable clamper side, the feed piece is inclined, and the opposing contact edge engages the movable support rod so as to bite from the outside, and the movable piece is engaged. The support rod is advanced by a predetermined amount by the operation lever via the feed piece.

Then, when the feed piece reaches the forward limit, the movable support rod locking means operates to prevent the movable support rod from retreating. Then, when the operation lever is returned and the drive operation is performed again to the handle portion side, the movable support rod is advanced through the feed piece in the same manner as described above, and the movable clamper is intermittently fed by repeating this operation. . That is, the joined body is intermittently fed to fit the joined body.

By employing such a feeding means, the structure becomes extremely simple, and the weight and cost can be reduced. Furthermore, the present invention relates to a bracket provided on the casing of the frame or the feeding means, wherein the movable support rod locking means is fitted on the movable support rod and one end of the movable support rod is pivotally movable in the rod axis direction. The locking piece having the stopped rod locking hole and a biasing spring for biasing the locking piece in the retreating direction of the movable support rod can be provided.

According to this configuration, the locking piece is always inclined with respect to the movable support rod, and the opposing contact edge engages with the movable support rod so as to bite from both outer sides (pinching shape), Since one end of the locking piece is locked to the bracket, the movable support rod is prevented from retreating. When the movable support rod moves forward, the movable support rod moves in the direction in which the locking piece bites, so that the locking piece is brought into a sliding contact state, that is, an unlocked state without biting. Therefore, when the movable support rod is retracted and returned, the biting of the locking piece is released by swinging the free end side of the locking piece toward the movable clamper against the urging force of the urging spring, The movable support rod can be easily moved backward.

Further, in the present invention, a ratchet mechanism, a rack and pinion mechanism, a screw mechanism, or the like can be employed as the movable support rod feeding means.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. The drawings show an embodiment of a coupling tool (1) for pipes and rods according to the present invention. This tool (1) inserts a resin pipe (4), which is a joined body, into a lateral opening of an elbow type joint pipe joined to the joined body (2), specifically, a lower end of a resinous vertical pipe (3). It is most suitable for bonding via adhesive, but it can be used not only for pipes, but also for connecting female joints and rods, and for connecting pipes and rods, etc.
The posture of the tube or the like, that is, any state such as vertical, horizontal or oblique can be combined.

The tool (1) comprises a support frame (5) and a workpiece (2) provided at one end (tip end) of the frame (5).
And a fixed clamper (6) detachably fixed to the support frame (5). The movable clamper (8) which is detachably fixed to a joined body (4) having a tubular movable support rod (7) provided and a fixed clamper (6) coaxially provided at the tip end of the support rod (7). ), A movable supporting rod feeding means (9) attached to the rear end of the frame (5), and a movable supporting rod locking means (10) having an unlocking function.

The support frame (5) is made of an aluminum alloy, has an L-shaped cross section, has a fixed clamper mounting piece (11) protruding from the rear side on the front end side, and has a movable support rod insertion hole (12) formed on the rear side on the rear end side. ) Is provided, and the front end mounting piece (11) is provided with a pivot insertion hole (14).
Is provided on an axis passing through the center of the support rod insertion hole (12) and parallel to the frame (5), and the pivot (15) of the fixed clamper (6) is inserted and fixed.

Most of the fixed clamper (6) and the movable clamper (8) are made of an aluminum alloy, and the pivot (15) passes through the hollow portion of the hollow pivot (16) of the movable clamper (8). Only the point and the inner radius of the clamp part are different, and the other configurations and dimensions are the same,
The constituent members of both clampers (6) and (8) are given the same reference numerals, and the movable clamper (8) will be described below.

As shown in FIG. 2, the movable clamper (8) has an arc-shaped clamp portion (17) on one side (upper side) and a handle portion (18) on the other side (lower side). A member (19) and an arc-shaped clamp portion (2
0) and a second member (22) having a clamp holding portion (21) on the other side (lower side), and the pivot (16) for pivotally attaching the two members (19) and (22) to be relatively rotatable. (Or (1
5)) and the clamp portion (1) of both members (19) and (22).
7) A coil spring (23), which is an urging means for urging (20) inward, and a handle (1) of the first member (19).
8) A pin (2) parallel to the pivot (16) (or (15))
4) a pair of front and rear second member locking and fixing rods (25) pivotally attached by (4), and the pin (2) between the ends of the fixing rod (25).
4) and a clamp holding portion locking pressing cam (28) having an operation handle (27) rotatably mounted by a pin (26) parallel to 4).

The clamps (17) and (20) have similar shapes, and clamp the object (2) or the object (4) by their arc-shaped opposing surfaces (17A) and (20A). ing. Then, the handle portion (18) of the first member (19) and the clamp holding portion (2) of the second member (22).
1) are located on opposite sides of the clamp portions (17) and (20). An opening formed between the lower half of the second member (22), that is, from the portion attached to the first member (19) to the tip of the clamp holding portion (21) is provided between the attached portions of the first member (19). The width is such that it can be inserted into the portion (29) together with the locking and fixing rod (25).

The clamp holding portion (21) of the second member (22) is provided at the end of the second member (22) facing the handle portion (18) in contact with the handle portion (18).
A closing regulation protrusion (30) for regulating the closing position of (0) is provided, and a pressing cam contact surface (31) is provided on the opposite side (outside) of the projection (30). A protrusion contact portion (32) is provided on a surface of the handle portion (18) of the first member (19) facing the protrusion (30), and the member (2) or the member (4) is bonded. In an unclamped state, the projection (30) is brought into contact with the projection contact portion (32) by the coil spring (2).
The contact is made by the biasing force of 3).

The second member locking and fixing rod (25) is positioned inside the handle portion (18) of the first member (19) and on both outer sides of the clamp holding portion (21).
It is swingably mounted via the pin (24). The pressing cam (28) is formed of an eccentric cam having an arc surface (28A) eccentric with respect to the center of the pin (26), and is in a state where the clamp holding portion (21) is pressed and fixed (that is, a solid line in FIG. 2). 2), the eccentrics are designed to be as close as possible to the maximum, and in the state shown by the solid line in FIG. 2, the state is maintained unless the operation handle (27) is operated, and thus the clamp holding is performed. The state is maintained.

When releasing the clamp, the clampers (8) and (6) rotate the operation handle (27) about the pin (26) in the direction of the arrow (A) in FIG.
2), and then the operating handle (27) is pulled in the direction of the arrow (2) in FIG.
By making the state shown in 2), the clamp holding portion (2
1) the pressing cam (2) from the pressing cam contact surface (31);
8) is released, the clamp cam (28) of the clamp holding part (21) is released, and the clamp parts (17) and (2) are released.
0) can be freely opened, that is, an unclamped state. This operation can be performed by the operator with one hand and one touch, and is very simple.

When the clampers (8) and (6) are in the clamped state, the operation handle (27) is moved from the state shown by the two-dot chain line (272) in FIG. To the circular arc surface (2) of the cam (28).
8A) with the pressing cam contact surface (3) of the clamp holding portion (21).
2), and the operation handle (27) is turned around the pin (26) in the direction of the center arrow (b) in FIG. By making the state shown by the solid line (27), the pressing cam (2
8) presses and fixes the clamp holding portion (21), and the object (2) or the object (4) can be strongly clamped.

A cap nut (33) is screwed onto the front end of the pivot (15). As shown in FIG. 2, the first member (19) of the fixed clamper (6) is attached to the mounting piece (11) of the support frame (5) by the outer surface of the clamp part (17) at the upper end of the support frame (5). In a state in which it is in contact with the edge (5A), it is detachably attached by a bolt (34), and the clamp portion (17) of the fixed clamper (6) is positioned and fixed to the support frame (5).

The movable clamper (8) has a first member (19) attached to a front end of the movable support rod (7) by a bolt (36) via a mounting bracket (35).
The rear end of the pivot (15), which is mounted so that the axis of 6) and the tube axis of the movable support rod (7) coincide with each other and slidably penetrates the hollow of the hollow pivot (16), is movable. Support rod (7)
It is slidably inserted into the inside. In addition, Axis (15)
, Even if the rear end of the movable support rod (7)
The movable clamper (8) is located in the movable support rod (7).
And the movable support rod (7) is always supported and slidably guided.

The movable clamper (8) can reciprocate between the front and rear mounting pieces (11) and (13) of the support frame (5), and can pivot with respect to the support frame (5).
5) It is rotatable around, and the clamp part (1
The outer peripheral surface of 7) is positioned by contacting the upper edge (5A) of the support frame (5). By rotating the movable clamper (8) about the pivot (15) in this manner, the alignment of the joined body (4) with the joined body (2) is facilitated. In addition, the opening limit of the clamp part (20) is regulated by the outer surface of the clamp holding part (21) abutting on the lower inner edge (5B) of the support frame (5).

The movable support rod (7) is made of a steel pipe.
The inner diameter is slightly larger than the outer diameter of the pivot (15), and is sized to be slidable with respect to the pivot (15). The metal fitting (35) is welded to the front end, and the outer circumference of the rear end is reduced in diameter. A screw portion (37) is provided, a spring washer (38) is externally fitted, and a retaining nut (39) is screwed on.

The movable support rod feeding means (9) includes a casing (41) having a handle portion (40) detachably attached to a rear surface of the attachment piece (13) of the support frame (5), and a casing (41). 41) Handle part (40)
And a forward drive operating lever (43) pivotally mounted on the movable support rod (7) by a short axis (42), and pushed toward the frame (5) by the tip of the operating lever (43). Feed piece (44), feed piece retraction return spring (45) externally fitted between the movable support (7) between the feed piece (44) and the mounting piece (13), and the operating lever return spring ( 4
6).

The casing (41) is shaped like a mountain top hat in a plan view, has a substantially inverted L shape in a front view, and a portion corresponding to a hat flange is an attachment portion (47) to the attachment piece (13). A movable support rod insertion hole (48) is provided in a portion corresponding to the end, ie, a rear wall (41A), and covers the movable support rod (7) from front and rear. The handle portion (40) is shaped like a letter. The mounting portion (47) is provided with a mounting piece (1) of the support frame (5).
3) It is detachably fixed to the rear end face with a bolt (49).

The handle (4) of the casing (41)
A shaft hole (50) is provided in a penetrating shape in a direction orthogonal to the movable support rod (7) in the upper opposing piece of (0) to form a handle portion (40) having a U-shaped cross section. The mounting portion (47) is provided with a mounting piece (13) of the support frame (5).
It is detachably fixed to the rear end face by a bolt (49).

The handle (4) of the casing (41)
A shaft hole (50) is provided in a penetrating direction in a direction orthogonal to the movable support rod (7) in the upper opposing piece of (0), and the operation lever (43) having a U-shaped cross section is formed by a short axis (42). The return lever (43), which is pivotably mounted and consists of a torsion spring fitted around the short shaft (42), allows the operating lever (43)
Return to the open state.

The upper end of the operating lever (43) is bifurcated by opposing pieces, and a feed piece driving pin (51) parallel to the short axis (42) is fixed between the opposing pieces. The upper end is formed on the rear wall (41) of the casing (41).
By abutting on A), the limit of return of the operation lever (43) is regulated, and the limit of closing operation is regulated by the stopper (52) provided on the handle portion (40).

The feed piece (44) is a rectangular plate having a movable support rod insertion hole (53) in the center, and a casing (4).
1) and the diameter of the rod insertion hole (53) is slightly larger than the outer diameter of the movable support rod (7). ) Is provided, and the feed piece (44) is connected to the drive pin (51) and the rear wall (4) by the return spring (45).
1A) The feed piece positioning contact piece (55) provided at the upper end is pressed.

Therefore, when the operating lever (43) is operated in the closing direction (indicated by an arrow (f) in the drawing), the driving pin (51) pushes the engaging projection (54) of the feed piece (44) forward. Although it is pushed, since the feed piece (44) is urged backward by the return spring (45), the two-dot chain line (441) is shown in FIG.
And the upper and lower edges of the rod insertion hole of the feed piece (44) are engaged in a pinching manner so as to bite into the upper and lower sides of the outer surface of the movable support rod (7). The feed piece (4
By the engagement of 4), the movable support rod (7) is advanced by the feed piece (44) by frictional resistance with the movable support rod (7).

After the feed piece (44) reaches the forward limit shown by the two-dot chain line (442) in FIG.
When the operation force of 3) is weakened, the feed piece (44) together with the operation lever (43) starts a return operation by the respective return springs (45) and (46). At this time, the movable support rod (7) is locked to the casing (41) by the locking means (10), and does not retreat with the feed piece (44).

The locking means (10) is provided with a feeding means (9).
A rearwardly extending bracket (56), a movable support rod (7), and an upper end of which is fitted in an engaging hole (57) of the bracket (56) in the rod axis direction on the casing rear wall (41A). A locking piece (58) locked to be swingable and a locking piece (5
A coil spring (59) for urging the movable support rod (7) in a retreating direction; a coil support (7) inside the coil spring (59); 48) is constituted by a spring holding cylinder (60) fixed concentrically to the outer periphery of 48).

The bracket (56) extends rearward above the movable support rod (7) from the upper end of the casing rear wall (41A), and its rear end (56A) is bent downward to allow the rod (56) to be bent downward. An insertion hole (61) is provided, and the movable support rod (7) is inserted into the hole (61). A rod insertion hole (6) is formed on the rear surface of the bracket rear end (56A).
A spring receiving cylinder (62) is fixed concentrically to the outer peripheral side of 1), and is movable between the rear end (56A) of the bracket and the spring washer (38) and the outer periphery of the movable supporting rod (7). A rod retraction return spring (63) is externally fitted.

The engagement hole (57) provided in the bracket (56) is a rectangular hole in plan view, and has a size such that the locking piece (58) swings with a margin. The locking piece (5
8) is plate-shaped, provided with a retaining projection (64) whose upper end protrudes left and right from the engagement hole (57), and is provided with a movable support rod (7).
The lower part of the rod locking hole (65) is narrowed in the left-right direction and is bent forward to form a locking release operation part (66). I have.

The locking piece (58) is constantly urged rearward by a coil spring (59) to maintain the state shown by the solid line in FIG. When the edge is engaged so as to bite into the outer periphery of the movable support rod (7) and a force in the backward direction of the movable support rod (7) acts,
Further, the bite becomes strong, and the movable support rod (7) is prevented from retreating. Then, when the unlocking operation portion (66) of the locking piece (58) is pushed in the direction shown by the arrow (g) in FIG. 4 against the elastic force of the coil spring (59), the rod Stop hole (6
The lock by the edge of 5) is released, and the movable support rod (7) is retracted by the return spring (63). When the hand is released from the unlocking operation part (66) and the pushing is stopped,
The locking piece (58) returns to the state shown by the solid line in FIG. 4 by the coil spring (59), and the movable support rod (7) is locked.
Retreat is prevented.

In the above embodiment, when connecting the resin pipe (4) to the elbow joint pipe (2), first, the lock release operation part (66) is operated to lock the movable support rod (7). Is released, the movable clamper (8) is moved to the retreat limit together with the rod (7), and both clampers (6) and (8) are operated by operating their operation handles (27) to be in the unclamped state. Next, the tip of the opposed clamp portion (17) (20) of the fixed clamper (6) is applied to the joint pipe (2), and the fixed clamper (6) is pushed up, whereby the clamp portion (17) (2) is pressed.
0) is pushed open against the resilience of the coil spring (23), and the joint pipe (2) is connected to both clamp portions (17) (20).
Once inside, the operating handle (27) is operated to clamp the joint pipe (2).

Subsequently, the resin pipe (4) is pushed between the two clamp portions (17) and (20) of the movable clamper (8) with the front end as close as possible to the joint pipe (2).
The same operation as the fixed clamper (6) is performed to clamp the resin pipe (4). Then, after applying an adhesive to the outer periphery of the front end portion of the resin pipe (4), the resin pipe (4) is aligned with the joint pipe (2), and then the feed means (9) is driven forward. By operating the operation lever (43) by hand,
The movable clamper (8) advances with the movable support rod (7), and the resin pipe (4) is forcibly inserted into the joint pipe (2).

In this way, when the front end of the resin pipe (4) is inserted into the joint pipe (2) by a required dimension, the operation of the feeding means (9) is stopped. At this time, the locking means (10)
, The movable support rod (7) is locked and fixed to the support frame (5) via the locking piece (58), the bracket (56), and the casing (41), so that the movable clamper (8) is positioned. Since the resin pipe (4) is fixed, the resin pipe (4) is kept inserted in the joint pipe (2) in a required dimension, and is held for a time during which the adhesive is solidified and the bonding between the two is completed.

When the adhesive connection between the joint pipe (2) and the resin pipe (4) is completed, the fixed and movable clampers (6) and (8) are
By operating the operation handle (27) as described above to release the clamp, the two clamp portions (17) and (20) resist the urging force of the coil spring (23) due to the weight of the tool (1). It opens and separates from both pipes (2) and (4) to complete the joining operation.

According to the above embodiment, the two clampers (6) and (8) can be easily and reliably mounted in a short time by a one-touch operation on the workpiece and the workpiece. The centering of the body can be easily performed by rotating the movable clamper (8) about the pivot (16), and the forward movement of the movable support rod (7) is also reliable and powerful insertion drive is possible. However, it is possible to reduce the weight and the size of the device, and it is possible to greatly improve the joining action.

The feed means (9) can employ a ratchet mechanism composed of ratchet teeth engraved on the movable support rod (7) and ratchet pawls provided on the operation lever (43) side. , Or rack and pinion mechanism,
Furthermore, a screw mechanism or the like can be employed, and a drive mechanism using hydraulic pressure, pneumatic pressure, or the like can be added.
Also, the rod retraction return spring (63) is omitted,
The movable support rod (7) can be manually retracted,
The pivot (15) may be shortened to be a pivot of only the fixed clamper (6).

The present invention is not limited to the above embodiment. For example, the movable support rod (7) may be a solid round rod or a rod, or may employ a square tube, a clamp holding mechanism, a locking means. As (10) and the like, those conventionally used generally can be used. Further, the arc surfaces (17A) (20A) of the clamp portions (17) (20) of both clampers (6) (8).
In addition, a size adjustment attachment capable of clamping other small-sized pipes, square members, and the like can be detachably provided, so that a plurality of sizes can be supported.

The article to be joined and the joined article are not limited to pipes, and can be used for all rods, pipes, rods and the like having a male-female connection relationship, and can be applied not only to round materials but also to square materials.

[0053]

As described above, according to the present invention, the fixed clamper 6 is provided at one end of the support frame 5 and the movable clamper 8 is provided at the other end of the frame 5 via the movable support rod 7. Since the feed means 9 and the locking means 10 of the movable support rod 7 are provided at the end on the opposite side of the movable clamper 8, the to-be-joined body 2 and the to-be-joined body 4 are easily aligned, and various It can be adapted to size and conditions, and the clamping force is strong, it can securely and firmly insert and join the joined body and the joined body, and can stably hold the joining state for any time,
Workability is good, and reduction in size and weight can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall front view showing an embodiment of the present invention.

FIG. 2 is an enlarged view taken along line AA of FIG. 1;

FIG. 3 is a plan view of a right half of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coupling tool 2 Workpiece 4 Joined body 5 Support frame 6 Fixed clamper 7 Movable support rod 8 Movable clamper 9 Movable support rod feed means 10 Movable support rod locking means 15 Axis 16 Hollow pivot 17 Clamp section 18 Handle section 19 1 member 20 clamp part 21 clamp holding part 22 second member 23 urging means (coil spring) 24 pin 25 second member locking fixed rod 26 pin 27 operating handle 28 clamp holding part locking pressing cam 40 handle part 41 casing 42 Short shaft 43 Forward drive operation lever 44 Feeding piece 45 Feeding piece retraction return spring 46 Operation lever return spring 56 Bracket 57 Engagement hole 58 Locking piece 59 Urging spring (coil spring) 65 Rod locking hole

Claims (7)

[Claims] 1. A support frame, a fixed clamper detachably fixed to an object to be joined provided at one end of the frame, and a movable end in a longitudinal direction movable to the other end of the support frame, and approaching / separating from the fixed clamper. A movable support rod provided so as to be movable, a movable clamper removably fixed to a joint provided coaxially with the fixed clamper on the fixed clamper side of the support rod, and an opposite side of the movable clamper on the other end of the frame. A movable support rod feeding means mounted and mounted on a movable support rod, and a movable support rod locking means having an unlocking function. 2. The fixed clamper according to claim 1, wherein the pivot of the fixed clamper passes through the hollow pivot of the movable clamper, and the movable support rod is hollow, and the pivot is slidably inserted into the hollow. Tools for joining pipes and rods described in 1. 3. The joining tool according to claim 1, wherein the movable clamper is swingable about a pivot. 4. The first fixed and movable clamper has an arc-shaped clamp portion on one side and a handle portion on the other side.
A member, a second member having an arc-shaped clamp portion on one side and a clamp holding portion on the other side, a pivot for pivotally attaching the two members to be relatively rotatable, and a clamp portion for the two members facing inward. An urging means such as an urging spring, a pair of front and rear second member locking fixed rods pivoted by a pin parallel to the pivot on the handle of the first member, and an end rod of the fixed rod parallel to the pin. 4. The joining tool for a pipe, a rod, or the like according to claim 1, 2, or 3, further comprising a clamp holding portion locking pressing cam having an operation handle rotatably mounted by a pin. 5. A casing having a handle portion attached to the frame end, a forward drive operating lever pivotally connected to a handle portion of the casing by a short axis, and an outer fitting to the movable support rod. A feed piece having an engaging hole to be pressed and pushed in the frame direction by the tip of the operation lever, and a retraction return spring and an operation lever return spring of the feed piece. A joining tool for a pipe or a rod according to any one of claims 1 to 4. 6. The movable supporting rod locking means is fitted on a bracket provided on a casing of the frame or the feeding means, and is fitted on the movable supporting rod and one end is locked on the bracket so as to be swingable in a rod axis direction. And a biasing spring for biasing the locking piece in a retreating direction of the movable support rod.
5. The joining tool for a pipe or a rod according to any one of 5. 7. The movable support rod feeding means is a ratchet mechanism, a rack and pinion mechanism, or a screw mechanism.
7. A joining tool for a pipe, a rod, or the like according to any one of to 4 or 6.