JP2012200997A - Clamp device for electrofusion joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp device for electrofusion joint, which is easily portable, capable reducing a storage space, needless in the arrangement for detaching or assembling and capable of improving working efficiency.SOLUTION: The clamp device for an electrofusion joint which is freely foldable has a joint part 2 formed by pivotally fitting a connection body 3 of one arm 5 to a connection body 4 of another arm 6 to freely adjust an angle and is formed by attaching clamp bodies 7, 7 attaching chain vices 9, 9 to each arm 5, 6, wherein notches 11, 11 to which folded each arm 5, 6 is intercalated in the clamp bodies 7, 7 are formed. By forming the notches 11, 11 to which the folded arm 5, 6 is intercalated in each clamp body 7, 7, a position is shifted so that the clamp bodies 7, 7 attached to the folded arms 5, 6 does not interfere with each other.

Description

  The present invention relates to a clamp device for an electrofusion joint used at the time of fusion-bonding an electrofusion joint with a built-in heating wire and a resin pipe such as a polyethylene pipe at a predetermined angle.

  When fixing a resin tube such as a polyethylene tube inserted into the connection port of an electrofusion joint with a built-in heating wire at a predetermined angle, until the molten resin hardens, A clamp device for an electrofusion joint is used (see, for example, Patent Document 1). This clamping device for an electrofusion joint becomes larger as the electrofusion joint to be joined becomes larger. However, a large-sized electrofusion joint clamping device has a problem that it is difficult to carry. Therefore, there is one that reduces the storage space by removing the clamp device from the support rod and folding it (see, for example, Patent Document 2).

  However, even if folding can reduce the labor and space during storage and carrying, it takes time and effort to set up and remove the clamping device, and it is lost if the removed clamping device is not managed properly. There is a problem that an accident occurs.

Japanese Patent Laid-Open No. 10-230548 JP 2008-23950 A

  An object of the present invention is to provide a clamp device for an electrofusion joint that can be easily carried, can reduce a storage space, does not require setup such as removal and assembly, and can improve work efficiency.

  According to the present invention, the joint part is pivotally mounted so that the connecting body of one arm and the connecting body of the other arm can be adjusted in angle, and the clamp body in which a chamber is attached to each arm can be slidably fixed. A clamp device for a foldable attached electrofusion joint, wherein each clamp body is formed with a notch for interposing each folded arm.

  Note that the notch has a leg side that is arranged at the same height as the clamp bolt for fixing the clamp body, and the notch is closer to the chain locking position on the chain locking side of the chamber. The joint is formed with a pin hole for angle adjustment and folding on a concentric circle with the joint at the pivot center, and a lock pin that can be freely engaged and disengaged from the pin hole. It may be composed of the formed connecting body and a tightening bolt which is provided at the pivotal attachment center of the joint part and allows the connecting bodies to be fixed to and away from each other.

  According to the present invention, the joint part is pivotally mounted so that the connecting body of one arm and the connecting body of the other arm can be adjusted in angle, and the clamp body in which a chamber is attached to each arm can be slidably fixed. A clamp device for attached electro-fusion joints that can be folded, and by forming a cut-out for interposing each arm folded into each clamp body, the clamp bodies attached to the arms do not interfere with each other when folded. The position can be shifted as follows. Further, since the cutout portion is formed, it can be folded more compactly, and the storage space can be reduced and the carrying is facilitated.

  In addition, each clamp body is turned upside down so that the notch portion is formed with leg sides that are arranged in parallel at approximately the same height as the clamp bolts with knobs for fixing the clamp body. The clamp body can stand up with the clamp bolts with knobs placed side by side as the legs to clamp the electrofusin joint and the resin pipe. Can be done.

  Since the notch is formed inside the chain locking position on the chain locking side of the chamber, the chain locking position can be lowered to a position where it does not interfere with the arm's pivot trajectory, hindering arm folding. There is nothing.

  A joint in which a joint is formed with a pin hole for angle adjustment and folding on a concentric circle centering on the pivot, a joint in which a lock pin that is detachable from the pin hole is extended, and a pivot of the joint The arm can be locked at a predetermined angle by including a fastening bolt provided at the center of attachment and capable of freely connecting and fixing the connecting members.

It is a partially cutaway top view which shows preferable embodiment of this invention. Similarly, it is a partially cutaway front view. It is a side view similarly. It is a top view which shows the state which arrange | positioned the chain latching side of a clamp main body inside an arm, and hold | maintained the electrofusion coupling and the resin pipe | tube. It is a top view which shows the state which arrange | positioned the chain latching side of a clamp main body on the outer side of an arm, and hold | maintained the electrofusion joint and the resin pipe | tube inward. It is a partial front view which shows the state which can loosen a joint part and can pivot an arm. It is a side view which shows the state which folded the arm. It is a side view which shows the state which made the clamp main body stand with the leg side and the fastening bolt with a knob.

Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of a clamp device for an electrofusion joint, and FIGS. 2 and 3 are a front view and a side view thereof.
Reference numeral 1 denotes an apparatus main body. The apparatus main body 1 includes arms 5 and 6 connected to the coupling bodies 3 and 4 of the joint portion 2, clamp bodies 7 and 7 attached to the arms 5 and 6, and the clamp body 7. , 7 and chambers 9, 9.

  The joint portion 2 is formed with a plurality of pin holes 3a for angle adjustment and folding on a concentric circle at the pivot center, and can be engaged with and disengaged from the coupling body 3 having the arm connection portion 3b and the pin hole 3a. The lock pin 4a is formed in a protruding manner and the arm connection portion 4b is formed, and the link body 3 is provided at the pivot center of the joint portion 2 so that each of the connection bodies 3 and 4 can be contacted and fixed freely. It comprises a fastening bolt 2a with a knob for engaging and disengaging with the pin 4a. The tightening bolt 2a is screwed into a female screw 3c formed in the connecting body 3 to perform tightening.

  The clamp bodies 7 and 7 are provided with chambers 9 and 9 for fastening and holding the resin pipes P, and are attached to the arms 5 and 6 so as to be slidably fixed. The chain vises 9 and 9 are formed with chain fastening bolts 13 and 13 that are pivotally screwed into the clamp bodies 7 and 7 at one end and a plurality of locking extension pins 9a and 9a corresponding to the diameter of the resin pipe P. The length of the chain 9b can be adjusted by changing the locking extension pins 9a, 9a that are locked to the arm side 11a based on the diameter of the resin tube P. Further, the clamp bodies 7 and 7 are formed with angled resin tube receivers 7a and 7a on the lower surface, and cutout portions 11 and 11 are formed on the chain locking side.

  The notches 11 and 11 are bowl-shaped recesses formed on the pivotal trajectories of the arms 5 and 6, and when folded, the notches 11 of one clamp body 7 become bowl-shaped in the opposite direction. The opening is directed on the pivotal locus of the arms 5 and 6. The saddle-shaped notches 11 and 11 are composed of arm sides 11a and 11a extending laterally and leg sides 11b and 11b extending upward, and the upper sides of the arm sides 11a and 11a are provided with locking tension. Concave grooves 11c and 11c for locking the output pins 9a and 9a are formed.

  Also, on the opposite side of the clamp body 7, 7 to the chain locking side, the chain is tightened with a knob that is screwed into pivot shafts 15, 15 pivoted on the clamp bodies 7, 7, so that it can swing. Bolts 13 are provided.

  Reference numerals 17 and 17 denote knob-clamping bolts that fasten and fix the arms 5 and 6 to the clamp bodies 7 and 7. The knob-clamping bolts 17 and 17 are tightened with the knobs when the arms 5 and 6 are tightened. The heights of the knobs of the attached bolts 17 and 17 and the heights of the leg sides 11b and 11b are substantially equal. For this reason, when the clamp bodies 7 and 7 are turned upside down, the bolts 17 and 17 with knobs and the leg sides 11b and 11b can stand as support points at four points, so that the electrofusion joint E and The resin pipe P can be held independently.

  20 is a rotation vise for the arms 5 and 6 formed in the arm insertion holes of the clamp bodies 7 and 7, and 21 is a display unit showing the arm angle and the folding angle imprinted on the surfaces of the coupling bodies 3 and 4, The reason why the display unit 21 is engraved on the surfaces of the coupling bodies 3 and 4 is to make the angle visible when the apparatus main body 1 is turned over. Reference numeral 22 denotes a pointer for adjusting the angle imprinted on the surfaces of the coupling bodies 3 and 4, and the pointer 22 adjusts the angle of the display unit 21 to pivot or fold the arm to a predetermined angle. Can do.

  What was comprised in this way inserts the edge part of the resin pipe P in both the connection port parts of the electrofusion joint E of an elbow as shown, for example in FIG. Next, the locking bolts 2a with knobs are loosened and the connecting bodies 3 and 4 which are integrated by being tightened are separated, and the lock pin 4a is extracted from the pin hole 3a for folding. Based on the angle of the electrofusion joint E, that is, 90 °, 90 ° of the arm angle display unit 21 is aligned with the pointer 22, and the angles of the arms 5 and 6 are set to 90 °.

  When the tightening bolt 2a is tightened after setting the angle, the lock pin 4a is inserted into the pin hole 3a at the 90 ° position, and the angles of the arms 5 and 6 are locked. Subsequently, the clamp bolts 17 on the arms 5 and 6 are moved to a position where the resin pipes P inserted into the two connection ports of the joint electrofusion joint E can be held as shown in FIG. Slide 7 and 7. After the slide, the clamp bolts 17 and 17 are tightened to fix the clamp bodies 7 and 7 to the arms 5 and 6.

  Subsequently, as shown in FIG. 4, the upper surfaces of both resin pipes P are received by the clamp bodies 7, 7 and attached to chain fastening bolts 13, 13 attached to one end of the clamp bodies 7, 7. The chains 9b and 9b are wound around the resin pipe P, and the other ends of the chains 9b and 9b are engaged with the locking extension pins 9a and 9a corresponding to the diameter of the resin pipe P in the concave grooves 11c and 11c of the arm sides 11a and 11a. Stop.

  After the locking overhanging pins 9a, 9a are locked, the chain 9b, 9b wound by rotating the chain tightening bolts 13, 13 in the tightening direction is tensioned to clamp the resin pipe P to the clamp body 7, 7 and the chains 9b and 9b are fastened and fixed. When the electrofusion joint E and the resin pipe P are clamped in this way, the heat wire of the electrofusion joint E is energized and heat-sealed to cool and cure the resin, and then the chain fastening bolts 13 and 13 are loosened to change the chain. What is necessary is just to remove 9b and 9b from the resin pipe P, and to release a clamp.

  4, the arms 5 and 6 are arranged outside the electrofusion joint E. However, as shown in FIG. 5, the arms 5 and 6 may be arranged inside the electrofusion joint E. Is an arrangement performed when the electrofusion joint E becomes larger and the lengths of the arms 5 and 6 are insufficient. By arranging the arms 5 and 6 inside as shown by the electrofusion joint E of the same size, As shown in FIG. 5, there is a margin in the length of the arms 5 and 6. It can be seen that a larger electrofusion joint E can be clamped. It goes without saying that this arrangement can also be applied when restrictions are placed on the installation of the apparatus main body 1 in the work space.

  When carrying or storing such a clamp device for an electrofusion joint, the tightening bolt 2a is loosened to separate the coupling bodies 3 and 4 to disengage the pin hole 3a from the lock pin 4a. In addition, the clamp bolts 17 and 17 are loosened to slightly shift the position of one clamp body on the arm so that the clamp bodies 7 and 7 do not interfere when folded.

  If the apparatus main body 1 is folded in this state, the arms 5 and 6 are intervened in the notches 11 and 11 of the clamp main bodies 7 and 7 as shown in FIG. Of course, it can be stored even in a small storage place. Moreover, since the clamp bodies 7 and 7 are carried and stored without removing them from the arms 5 and 6, there is no risk of dropping them and losing them into other objects. As a result, the work efficiency is improved.

  FIG. 8 shows the apparatus main body 1 turned upside down. The apparatus main body 1 is erected by the leg sides 11b of the clamp main bodies 7 and 7 and the tightening bolts 17 with knobs to hold the electrofusion joint E and the resin pipe P. be able to. This is applied when the electrofusion joint E and the resin pipe P are fusion-bonded independently of the ground.

1 Device body 2 Joint part
2a Tightening bolt 3 Connected body
3a Pin hole
3b Arm connection
3c Female thread 4 Connected body
4a Lock pin
4b Arm connection part 5 Arm 6 Arm
7,7 Clamp body
7a, 7a Resin pipe holder
9,9 Chamberise
9a Overhang pin for locking
9b Chen
11 Notch
11a Arm side
11b Leg side
11c groove
13 Chain tightening bolt
15 pivot axis
17 Tightening bolt with knob
20 Non-rotating vise
21 Arm angle display
22 Pointer E Electrofusion joint P Resin pipe

Claims (4)

  The joint part is pivotally attached so that the connecting body of one arm and the connecting body of the other arm can be adjusted in angle, and the clamp body with a chamber attached to each arm is slidably fixed. A clamp device for an electrofusion joint, comprising: a notch for interposing each arm folded into each clamp body.   2. The clamp device for an electrofusion joint according to claim 1, wherein the notch portion is formed with a leg side that is arranged at substantially the same height as the clamp bolt for fixing the clamp body.   3. The clamp device for an electrofusion joint according to claim 1, wherein the notch is formed inside a chain locking position on the chain locking side of the chamber.   A joint in which a joint is formed with a pin hole for angle adjustment and folding on a concentric circle centering on the pivot, a joint in which a lock pin that is detachable from the pin hole is extended, and a pivot of the joint The clamp device for an electrofusion joint according to claim 1, 2, 3, or 4, comprising a fastening bolt that is provided at a center of attachment and that allows each of the coupling bodies to be contacted and separated.

Images