JPH028698Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a one-handed wrench that can be used to tighten plastic nuts, metal nuts, etc. without damaging them, for example, in piping work, and is easy to perform repeated operations and has excellent workability. This is related to.

[Conventional technology]

A one-handed wrench conventionally used as this kind of plumbing tool is shown in Fig. 1, and is composed of a handle rod 1, an upper jaw rod 3 with an upper jaw portion 2, and an adjustment nut 4 for adjusting the upper jaw rod 3. The opening of the gripping part 5 is adjusted by rotating the adjustment nut 4, but if the object to be gripped is large 6, there will be a lot of rotational movement, which will take time and effort, which is a disadvantage in terms of work.

Further, the gripping object 6 is tightened by rotating the gripping part 5 by a certain angle and then removing the gripping part 5 from the gripping object 6.
After returning to its original position, the gripping part 5 grips the object 6 again and then tightens it, and this operation is repeated until the end, which is time consuming and has a disadvantage in terms of work.

[Problem that the invention attempts to solve]

The present invention solves these drawbacks, and allows for easy adjustment of the opening of the gripping part, and the gripping part opens automatically, making it easy to return to work, allowing for workability that allows repeated work to be performed continuously. The technical challenge is to provide an excellent one-handed wrench.

[Means for solving problems]

A mounting hole 12 is formed in the vertical direction near the tip of the handle rod 11 having a lower jaw portion at the tip, and an L-shaped upper jaw rod 14 having an upper jaw portion 13 is inserted into the mounting hole 12. The upper jaw rod 14 is provided to be movable in the vertical direction and slidable in the front and rear directions.
A pressure mechanism 15 is provided on the handle rod 11 to press diagonally forward, and a stopper pin 16, which engages the back surface 14a of the upper jaw rod 14 between the wall of the mounting hole 12 in front of the upper jaw rod 14, is rotatable at a predetermined angle. This one-handed wrench is characterized in that the stopper pin 16 has a notch 26 on one side thereof which forms a locking surface close to the shaft center.

〔Example〕

A slide elongated hole 18 having serrated locking teeth 17 is formed in this upper jaw rod 14, and a claw plate 20 having a locking pawl 19 is placed in this slide elongated hole 18. It is pivotally connected to the pivot shaft 21 of the jaw rod 14, and a C-shaped spring 22 is provided between the pawl plate 20 and the handle rod 11 to engage the locking pawl 19 with the locking tooth 17. A case is shown in which when the upper jaw lever 14 is tilted backward against the shaped spring 22, the locking pawl 19 is disengaged from the locking tooth 17, allowing the upper jaw lever 14 to move.

The compression mechanism 15 has a spring storage hole 23 formed in the length direction at the tip of the handle rod 11, a spring 24 stored in the spring storage hole 23, and a pressing rod 25 provided at the tip of the spring 24. This pressing rod 25 presses the back surface 14a of the upper jaw rod 14.

The stopper pin 16 is partially formed with a notch 26 into which the back surface 14a of the upper jaw 14 is pressed. A lever 29 is provided at one end.

The handle rod 11 is shown to be made of hard reinforced plastic, and a lower jaw part 10 made of metal is fixed to the tip thereof.

[Effect of idea]

Since the present invention is configured as described above, the lower jaw portion 1
0 and the upper jaw part 13
To adjust the mouth opening of 0, simply press the upper jaw part 13 of the upper jaw rod 14 to move the upper jaw rod 14, so it can be adjusted instantly and arbitrarily, which increases work efficiency. Become.

When grasping the object 31, the mouth is opened by hooking one's fingers on the corner of the upper jaw part 13 and the upper jaw rod 14 and tilting it backward against the pressure mechanism 15. In this state, the lower jaw part 10 and the upper jaw portion 13.
When the object 31 is placed in the grip 31 and the corner of the upper jaw part 13 and the upper jaw rod 14 are released, the upper jaw rod 14 returns to its original position by the return action of the elastic mechanism 15, and the lower jaw part 10 and the upper jaw rod 14 return to their original positions. The upper jaw portion 13 grips and holds the object 31.

In this case, if the gripping part 30 is strongly pushed into the gripping object 31 and the gripping object 31 hits the inside of the upper jaw part 13 by pushing the gripping part 30 deeply into the gripping object 31, the upper jaw rod 14 will slide backward and at the same time move slightly upward due to this impact. There was a drawback that the opening width of the gripping part 30 widened, making it impossible to tighten. (Actually, when the upper jaw lever 14 returns approximately 35 degrees, the locking pawl 19 comes off the locking teeth 17 and the upper jaw lever 14 moves.) In this point, the present invention has a structure in which the upper jaw lever 14 is attached to the back surface 14a at the rear of the upper jaw lever 14. Since the stopper pin 16 that presses and separates is provided, after adjusting the opening width of this gripping part 30, when this stopper pin 16 is rotated and pressed against the back part 14a of the upper jaw 14, the upper jaw 14 will be moved by the grip 31. Even if it is pushed in, the stopper action of the stopper pin 16 prevents the upper jaw rod 14 from sliding backward, so that the opening width of the gripping part 30 does not open.

When adjusting the opening width of the grip part 30, the stopper pin 16 is returned to its original position and separated from the back surface 14a of the upper jaw rod 14, thereby creating a gap between the stopper pin 16 and the rear surface 14a, and the upper jaw rod is adjusted by that amount. 14 slides rearward, and the opening width of the gripping part 30 can be easily adjusted.

Handle rod 1 held in this gripped state
1 tightens the grasped object 31, but the upper jaw lever 14 is always connected to the compression mechanism 15.
Since the structure is such that the object 31 to be gripped is automatically grabbed and held, if the handle rod 11 is returned to its original position without removing the grip portion 30 from the object 31 after the tightening operation, the grip portion 30 will be automatically held. Since the opening and returning operations can be easily performed, and the repeated tightening operations can be performed continuously, the operation time can be dramatically shortened, which has excellent practical effects.

[Brief explanation of the drawing]

Figure 1 is a front view of the conventional product, Figure 2 is a perspective view of the proposed product, Figure 3 is an exploded perspective view of the main parts, and Figures 4 and 5 are front sectional views of the main parts showing the operation of the proposed product. be. 10...Lower jaw part, 11...Handle rod, 12
...Mounting hole, 13... Upper jaw part, 14... Upper jaw rod, 14a... Back part, 15... Repression mechanism, 16
...Stopperpin.

Claims (1)

[Scope of utility model registration request] A mounting hole is formed in the vertical direction near the tip of the handle rod that has a lower jaw portion at the tip, and an L-shaped upper jaw rod that has an upper jaw portion is inserted into this mounting hole to move vertically. A pressure mechanism is provided on the handle bar so that it can slide in the front-back direction and presses the upper jaw diagonally forward, and a stopper pin is provided between the walls of the mounting hole in front of the upper jaw to lock the back part of the upper jaw. This one-handed wrench is characterized in that the stopper pin is mounted on a shaft so that it can freely rotate at an angle, and a notch is formed on one side of the stopper pin to form a locking surface close to the shaft center.