JPS6144784Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a pipe fixing vise that can securely fix pipes of various diameters.

Pipe fixing vises are widely used to connect pipes in water, gas, etc. installation work, and the conventionally known chain vise fixes pipes by wrapping a chain around the pipe and tightening it. This has the advantage of being able to fix the pipe regardless of its diameter, but has the disadvantage that the pipe may slip against the chain if a strong rotational force is applied to the pipe to tighten the screws.

The present invention has been completed with the objective of providing a pipe fixing vise free of the above-mentioned drawbacks, and will be described in detail below with reference to the illustrated embodiment.

In the figure, reference numeral 1 is a base constructed by opposing both side plates at a required interval, and a pipe P is provided on the top surface of the base 1.
A shallow V-shaped pipe receiving part 2 is formed to support the pipe receiving part 2, and on one side of the pipe receiving part 2, a swinging body 5 has a pin 6 for tightening the chain 3 for fixing the pipe downward. A base end of the chain 3 is connected to one end of the oscillating body 5, and a link pin of an extension of the chain 3 is locked on the other side of the pipe receiving portion 2. A number of locking portions 4 are provided protrudingly. When the protrusion 7 provided on the upper surface of the rocking body 5 is pressed by the tip of a threaded rod 9 with a handle 8 provided upright on the base 1, the rocking body 5 pivots counterclockwise. The base end of the chain 3 is pulled downward. Note that reference numeral 10 is a spring attached to the pin 6, which always applies a clockwise rotational force to the rocking body 5. Further, the pipe receiving part 2 has a substantially sector-shaped movable tooth 1 having a tooth part 11 formed on the upper surface thereof that contacts the outer surface of the pipe P.
2 is pivotally connected with a pin 13 at an eccentric position, and the movable tooth 12 is normally urged to rotate counterclockwise by the elastic force of a spring 15 provided on the pin 13. When the pipe P is not placed on the pipe receiving part 2, its large diameter part is forced to protrude from between the both side plates of the pipe receiving part 2, and when the pipe P is placed, the toothed part 1
1 is kept in contact with the surface of the pipe P and exposed from between the both side plates of the pipe receiving part 2. Reference numeral 18 denotes a chain tooth interposed in the intermediate portion of the chain 3. The chain tooth 18 has teeth 16 on the arcuate lower edge of the link plate, and tensions a spring 17 between adjacent link pins. The teeth 16 of the chain teeth 18 are
When the pipe P is rotated by a tightening force, the teeth bite into the pipe P together with the movable teeth 12 to securely fix the pipe. Therefore, the spring 17 normally protrudes beyond the teeth 16 of the chain teeth 18, and prevents the teeth 16 of the chain teeth 18 from getting caught on the pipe P when it is wound around the pipe P of the chain 3. In addition, the teeth 16 of the chain teeth 18 are prevented from touching other objects when not in use, and furthermore, when the chain 3 is removed from the pipe P, the bite of the teeth 16 into the pipe P can be easily released. Further, 19 is a girder rod stretched on the other side of the pipe receiving portion 2 of the base 1, and the girder rod 19
20 prevents the movable teeth 12 from interfering with the chain 3 and the movable teeth 12 from getting stuck when the fixed pipe P has a small diameter. A pipe insertion hole 21 is provided at the lower middle of the base 1 in a direction perpendicular to the pipe insertion hole 20 and is used to insert a pipe for stabilizing the base.

With this structure, first, the pipes for stabilizing the base are inserted into the pipe insertion holes 20 and 21 of the base 1, and then the pipe P to be fixed is inserted into the pipe receiving part 2 on the top surface of the base 1. The chain 3, whose base end is pivoted to one end of the rocking body 5, is wrapped around the upper circumferential surface of the pipe P, and its extension is locked to the locking part 4 provided on the other side of the pipe receiving part 2. Then, the substantially sector-shaped movable tooth 12, which is pivotally connected to the base 1 at an eccentric position with a pin 13, has a tooth portion 11 on the upper edge of the movable tooth 12 pivoted to the base 1 at an eccentric position.
The tooth portion 11 pivots slightly clockwise from the state in which it is in contact with the lower surface of the pipe P and is normally forced to protrude upwardly from the pipe receiving portion 2 by the spring 15, and the tooth portion 11 comes into pressure contact with the lower surface of the pipe P. Become. Next, when the handle 8 of the threaded rod 9 with a handle 8 is operated and the threaded rod 9 is rotated forward, the protruding portion 7 of the rocking body 5 is pressed, and the rocking body 5 is moved by the spring 1.
0 in the counterclockwise direction, the chain 3 is tightened downward, and the pipe P is fixed to the pipe receiving part 2. Therefore, if a pipe wrench or the like is used to screw the joint into one end of the pipe P, the pipe P will receive a clockwise rotational force and the movable teeth 12 which are in pressure contact with the lower surface of the pipe P with the teeth 11. will move slightly counterclockwise due to friction with the pipe P, but at this time, the movable tooth 12, which is pivotally mounted with the pin 13 in the eccentric position, has a large distance between the pin 13 and the tooth portion 11. Therefore, the tooth portion 11 protrudes further above the pipe receiving portion 2, and thus the pipe P is pressed downward by the chain 3 from above, and the tooth portion 11 of the movable tooth 12 strongly pushes the pipe from below. The pipe P is reliably fixed on the pipe receiving part 2 in an immovable state by biting into the surface of the pipe P. Also, at this time, the chain teeth 18 inserted at the appropriate positions of the chain 3 bite into the pipe P by the teeth 16 provided on the lower edge of the link plate, so the pipe P is further maintained in a fixed state. In addition, since there is no slippage, the pipe P will not be deformed. Therefore, when removing the pipe P, the handle 8 is rotated in the opposite direction to move the threaded rod 9 backward, and the swinging body 5 is pushed upward by the elastic force of the spring 10 and the chain 3 Therefore, it is sufficient to remove the tip of the chain 3 from the locking part 4 and remove the pipe P. In addition, chain 3
When loosening, tooth 1 of chain tooth 18 of chain 3
6 immediately separates from the surface of the pipe P by overhanging the tooth 16 due to the elastic force of the spring 17 between the adjacent ring pins tensioning it, and the movable tooth 12 is pivoted counterclockwise by the elastic force of the spring 15 and pushes the pipe P upward, so that the pipe P can be removed smoothly.

As is clear from the description of the above embodiments, the present invention is based on a base 1 having a pipe receiving portion 2 formed on its upper surface.
, a substantially fan-shaped movable tooth 1 having a tooth portion 11 formed on the upper edge to be in contact with the pipe tightened by the chain 3;
2 is pivotally mounted at an eccentric position with a pin 13, and a spring 1 is attached to the pin 13 for forcibly protruding the movable tooth 12 from the pipe receiving part 2 at all times.
5, and by interposing unique chain teeth 18 on the chain 3, the pipe can always be securely fixed in the pipe receiving part 2 without slipping. The practical value is extremely great as it eliminates the drawbacks of conventional pipe fixing vises.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention, FIG. 2 is a partially cutaway front view, and FIG. 3 is a partially cutaway side view showing the main parts of the chain. DESCRIPTION OF SYMBOLS 1... Base, 2... Pipe receiving part, 3... Chain, 4... Locking part, 5... Rocking body, 11... Teeth part, 12... Movable tooth, 13... Pin, 15... ...Spring, 16...Teeth, 17...Spring, 1
8... Chain teeth.

Claims (1)

[Scope of utility model registration request] A swinging body 5 that can be driven by a handle operation is attached to one side of the pipe receiving part 2 formed on the top surface of the base 1, and the base end is connected to one end of the swinging body 5. The ring plate is provided with teeth 16 on the lower edge thereof, and a chain tooth 18 is interposed between the adjacent link pins, and a spring 17 that normally extends beyond the teeth 16 is interposed. A locking portion 4 for locking the extension portion of the chain 3 is protrudingly provided on the other side of the receiving portion 2, and further,
A generally fan-shaped movable tooth 12 having a tooth portion 11 formed on the upper edge thereof, which is in contact with the pipe tightened by the chain 3, is pivotally mounted on the base 1 at an eccentric position with a pin 13. 13 has the movable tooth 1
A pipe fixing vise characterized in that a spring 15 is provided for forcibly protruding the pipe receiving part 2 from the pipe receiving part 2 at all times.