JPH0418774Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a pipe fitting tool used when connecting a piping pipe to a pipe fitting such as a bite-type pipe fitting for hydraulic piping.

(Prior art) The above-mentioned pipe fitting is made by inserting the tip of the pipe to be connected to the joint end of the pipe joint body, and then tightening the union nut threaded on the outer surface of the joint end, so that the union nut and the pipe are connected. The pipe and pipe fitting are connected by firmly inserting the sleeve interposed between them into the pipe, and in order to do this, use a wrench held in your left hand to hold the nut on the outer periphery of the pipe fitting body. The method used was to secure the union nut and tighten it using a wrench held in the right hand. However, when the union nut is rotated, friction with the union nut generates twisting torque on the pipe, so if the other end of the pipe is already connected, the connection may become loose or the pipe may become deformed. In order to prevent this, another worker must hold the base of the tube with a tool such as pliers, which is an inconvenience.

(Problems to be solved by the invention) The present invention solves the above-mentioned conventional problems and allows one person to easily connect a pipe and a pipe fitting without causing twisting torque to the pipe. It was completed with the aim of being a pipe fitting tool that could be used.

(Means for Solving the Problems) The present invention is a pipe fitting tool for connecting a pipe having an outer diameter smaller than the nut portion to a bite-type pipe fitting body having a nut portion. , the jaws at the tips of a pair of upper and lower handles, which are pivotally connected by a pin, are formed with teeth for gripping the tube facing each other, and the lower jaw, which is connected to the upper handle, is extended downward to a large extent. , at its lower end, there is a connecting part extending parallel to the pipe held by the teeth, and a nut part of the pipe joint body that rises upward from the tip of the connecting part and is located concentrically with the central axis of the pipe. A locking member consisting of an engaging wrench portion is provided in succession, and the locking member is installed in a non-rotatable manner with respect to the jaw portion so that the locking member can be replaced in accordance with the outer diameter of the nut portion of the pipe joint body. This is a characteristic feature.

(Function) In the device configured as described above, a pair of upper and lower handles pivotally connected by a pin are operated with one hand, and at the same time, the tube is bitten by the teeth formed opposite to the jaws of the handles. Since the nut part of the pipe fitting body can be fixed by the wrench part of the detent member connected to the lower end of the lower jaw, rotate the union nut with the wrench held in the other hand. This allows one person to connect the pipe and the fitting without causing any twisting torque on the pipe. In addition, since the anti-rotation member can be replaced in accordance with the outer diameter of the nut portion of the pipe joint body, and is non-rotatably attached to the jaw portion,
By replacing the spanner part, one tool can be used for several types of joints.

(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment. In the first embodiment shown in FIGS. 1 and 2, 1 and 2 are a pair of upper and lower A handle, 4 is a lower jaw formed at the tip of the upper handle 1, 5 is a lower handle 2
The upper jaws 6, 7 formed at the tips of the jaws 4, 5 are teeth for gripping a tube and are formed to face each other on the inner surfaces of the jaws 4, 5. In this embodiment, the teeth 6 of the lower jaw 4 are made planar while the other teeth 7 are made concave, but the present invention is not limited thereto, and both teeth may be made concave. As shown in the figure, the lower jaw portion 4 extends significantly downward, and a locking member 9 is connected to the lower end of the jaw portion 4 by two bolts 8. The anti-rotation member 9 consists of a connecting portion 10 extending parallel to the tube 50 held by the teeth 6 and 7, and a wrench portion 11 rising upward at right angles from the tip of the connecting portion 10. The portion 11 is parallel to the lower jaw portion 4, and has a recessed mouth portion 12 that engages with the nut portion 52 of the pipe joint body 51 at a position concentric with the central axis of the pipe 50. The size of the pipe joint is determined by JIS according to the diameter of the pipe 50, so if you prepare the anti-rotation member 9 corresponding to each size and attach it to the jaw 4 with the bolt 8 so that it cannot rotate. There is no need to prepare the tools of the present invention for each size of pipe joint.

Next, in the second embodiment shown in FIGS. 3 and 4,
Anti-rotation member 9 connected to the lower end of the lower jaw 4
is pivotally connected to the lower end of the jaw 4 by a shaft 12, and is configured to be held in the illustrated position by a ball 14 with a spring 13 housed in a recess on the lower surface of the jaw 4. 10 and spanner part 1
This embodiment differs from the first embodiment in that a shaft 15 and a ball 17 with a spring 16 are similarly provided between the second embodiment and the second embodiment. Each edge portion 18 of the connecting portion 10 is chamfered so that the connecting portion 10 has a 90° angle about the shaft 12.
Similarly, the spanner part 11 can be rotated around the shaft 15.
Since the spanner part 11 can be rotated by 90 degrees with respect to the connecting part 10 in the second embodiment, it is also possible to hang the spanner part 11 below the jaw part 4.
It is free to position it on either the left or right side of the jaw 4.

As shown in the figure, the tube 50 is gripped by the teeth 6, 7 formed on the jaws 4, 5 at the tips of the upper and lower handles 1, 2, and the lower end of the jaws 4 is By engaging the wrench portion 11 of the anti-rotation member 9 connected to the nut portion 52 of the pipe fitting body 51, the pipe 50 and the pipe fitting body 51 can be simultaneously fixed with one hand, while the other hand is engaged. By tightening the union nut 53 with a wrench held in the hand, the pipe 50 and the pipe joint body 51 can be connected by one person without applying twisting torque to the pipe 50. Furthermore, since the anti-rotation member 9 is composed of a connecting part 10 extending parallel to the pipe 50 and a spanner part 11 rising upward from the tip thereof, the spanner part 11 can be inserted from the jaw part 4 according to the size of the pipe joint. They can be positioned parallel to each other at an appropriate distance apart, and the connecting part 10 that connects the jaw part 4 and the spanner part 11 is located considerably below the central axis of the tube 50. There is an advantage that the union nut 53 can be easily tightened with a spanner or the like without any trouble. Further, since the rotation preventing member 9 is non-rotatably attached to the jaw 4, the pipe and the pipe fitting can be reliably connected without generating twisting torque on the pipe during connection. . Note that in the first embodiment, the rotation prevention member 9
The second embodiment has the advantage of being compatible with pipe fittings of various sizes by replacing the spanner part 1.
The advantage is that it can be used in the same way as a normal pliers by hanging the part 1 downward, or it can be used when the spanner part 11 is located on the opposite side of the jaw part 4 and the pipe 50 is connected to the pipe joint in the opposite direction. There is.

(Effects of the invention) As is clear from the above explanation, the invention enables one person to connect a pipe and a pipe fitting without causing twisting torque on the pipe, and also includes a rotation prevention member. It can be used with pipe joints of any size by simply replacing the pipe joint, and its practical value is extremely great as it solves the problems of the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the present invention;
Fig. 2 is a partially cutaway side view of the main part, Fig. 3 is a partially cutaway perspective view showing the second embodiment of the present invention, and Fig. 4 is a partially cutaway side view of the main part.
The figure is a partially cutaway side view of the main part. 1, 2...Handle, 3...Pin, 4,5...
Jaw portion, 6, 7...teeth, 9...rotation prevention member, 10
...Connection part, 11...Spanner part.

Claims (1)

[Scope of utility model registration request] The bite-type pipe fitting body has a nut part,
This is a pipe fitting tool for connecting a piping pipe with an outer diameter smaller than the nut part, and the pipe is attached to the jaw parts 4 and 5 at the tips of a pair of upper and lower handles 1 and 2 which are pivotally connected by a pin 3. The teeth 6 and 7 for biting are formed to face each other, and the lower jaw 4 connected to the upper handle 1 is extended downward to a large extent, and the lower end is formed with teeth 6 and 7 for biting. A connecting part 10 extending parallel to the pipe to be connected, and a spanner part 11 that rises upward from the tip of the connecting part 10, is located concentrically with the central axis of the pipe, and engages with the nut part of the pipe joint body. A pipe joint characterized in that a stopper member 9 is provided in series, and the stopper member 9 is attached to the jaw part 4 so as to be replaceable in accordance with the outer diameter of the nut part of the pipe joint body. tools.