JPH0246352B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is capable of tightening a nut with high efficiency by repeatedly tightening the nut while the nut remains fitted, without having to remove it from the nut each time it is tightened, unlike a ratchet trench. This relates to a wrench that can be used for tightening work.

[Conventional technology]

In the conventional monkey wrench shown in Japanese Utility Model Publication No. 35-11494, when the handle is turned in the direction in which A and B are about to touch in Fig. 5, the slide body B cannot slide because screws a and b are engaged. , becomes a normal monkey wrench.

On the other hand, if you turn it in the opposite direction, that is, if you turn it in the direction where A and B separate, then A and B will separate, so screws A and B will also separate, and slide body B will be able to slide, allowing it to rotate over the nut to the next surface. This monkey wrench is capable of the so-called ratchet method in which the nut is tightened by turning it in the opposite direction again.

[Problem that the invention seeks to solve]

The present invention uses a spanner instead of an adjustable wrench, and there is no screw structure that engages with each other, and the second and third
As shown in the figure, the proximal end 11' of the sliding lower jaw 11
The feature is that a protruding engagement part 13 is formed to protrude from the support part 3, and a disengagement step part 14 with which the protrusion engagement part 13 engages and disengages is provided at the lower part of the opposite end surface of the mounting plate 2. Therefore, when the holder 5 and the mounting plate 2 rotate in the direction of contact, the protruding engagement part 13 engages with the disengagement step 14, making it impossible for the sliding lower jaw 11 to slide outward, and conversely, the holder 5 5 and the mounting plate 2 rotate in the direction of separation, the protruding engagement part 13 disengages from the engagement/disengagement step 14, switches the lower slide jaw 11 to a state where it can slide outward, and slides against the spring 12. Slide the lower jaw 11,
It is a technical problem to provide a spanner that allows rotation relative to the nut a and that can be tightened by continuously rotating the nut in a ratchet manner.

[Means for solving problems]

The upper corner part 6 of the holding plate 5 that holds the upper side of the nut a, which is made up of the upper jaw 4 and the support part 3 of the sliding lower jaw 11
is pivoted to the upper part of a mounting plate 2 connected to one end of the grip handle 1 so as to rotate by a slight angle α, and the slide slot 15 is centered on the support portion 3 of this holding plate 5 from the lower end surface. This slide groove 15 is formed toward the
The base end 11' of the slide lower jaw 11 that faces the upper jaw 4 and holds the lower side of the nut a is fitted into the inner part so as to be slidable up and down, and the support portion is fitted into the fitting groove 16 provided in the base end 11'. A spring hole 17 is formed in the retaining plate 5 above the upper surface of the base end 11' of the sliding lower jaw 11, and a spring 12 is installed inside the spring hole 17. Slide the upper part of the spring 12 into the upper part of the spring hole 17, and slide the lower part of the spring 12 into the base end 1 of the lower jaw 11.
1', and is provided so that the sliding lower jaw 11 is always pulled toward the upper jaw 4 side by this spring hole 12, and the proximal end 11' of this sliding lower jaw 11 is
is made to protrude from the side surface of the support part 3 on the side of the mounting plate 2 to form a protruding engagement part 13, and a disengagement step part 14 on which the protruding engagement part 13 engages and disengages is provided at the lower part of the opposite end face of the mounting plate 2. This spanner is characterized in that a stopper gap l is formed to restrict the upward rotation angle range of the grip handle 1 to a slight angle α at which the engagement/disengagement step portion 14 disengages from the protruding engagement portion 13. be.

[Effect]

When the grip handle 1 is rotated in the direction in which the holding plate 5 and the mounting plate 2 come into contact as shown in FIG. When sliding becomes impossible and, conversely, the holding body 5 and the mounting plate 2 rotate in the direction away from each other, the protruding engagement portion 13 disengages from the disengagement step 14, allowing the sliding lower jaw 11 to slide outward. , the lower slide jaw 11 is slid against the spring 12, allowing the nut to rotate over the nut a, and the nut can be tightened by repeatedly rotating the nut in a ratchet manner.

〔Example〕

The spanner in the drawings is a combination spanner in which a box wrench is provided at the end of the handle.

In the figure, 8 is a pivoting bulge, 9 is a fitting groove, and 10 is a stopper.

〔Effect of the invention〕

Since the present invention is configured as described above, as shown in FIG.
When the grip handle 1 is rotated in the direction of the downward arrow while being held at , the protruding engagement portion 13 protruding from the side surface of the support portion 3 of the base end 11' of the sliding lower jaw 11 and the engagement/disengagement stage on the mounting plate 2 side 14 and the mounting plate 2 and the holding plate 5 are brought into an integrated state, the rotational force of the gripping handle 1 acts on the upper jaw 4 and the slide lower jaw 11 which is held stationary, thereby rotating the nut a. It can be moved and tightened.

Next, slide this nut a into the upper jaw 4 and the lower jaw 11.
When the grip handle 1 is rotated in the upward arrow direction by an angle α (approximately 10 degrees in the drawing) until it stops as shown in FIG.
The engagement between the protruding engaging portion 13 and the sliding lower jaw 11 is released, and the sliding lower jaw 11 becomes slidable.

When the grip handle 1 is further rotated in the direction of the arrow in this state, the grip handle 1 does not rotate any further using the pivot shaft 7 as a fulcrum, and the reaction force acts on the slide lower jaw 11, causing the slide lower jaw 11 to spring up. 12, the holding state of the nut a is released and it becomes idle, and as it is, the grip handle 1
When rotated, the sliding lower jaw 11 can overcome the diagonal a1 of the nut a and return to its original position by the restoring force of the spring 12, as shown in FIG. 2, and can hold the next side.

When the grip handle 1 is rotated in the direction of the arrow while the nut a is held in the state shown in FIG. 2, the nut a is rotated.
It will tighten.

By repeating this back-and-forth rotation of the grip handle 1, the slide lower jaw 11 slides up and down against the spring 12 each time, idling at a certain angle, rotating and tightening at a certain angle, and tightening the nut a. It can be tightened.

Thus, in the present invention, when the retaining plate 5 and the mounting plate 2 rotate in the direction of contact, the protruding engaging part 13 engages with the disengaging step part 14, making it impossible for the sliding lower jaw 11 to slide. Conversely, when the retaining plate 5 and the mounting plate 2 rotate in the direction of separation, the protruding engaging portion 13 disengages from the disengaging step portion 14, allowing the sliding lower jaw 11 to slide outward, and continuously moving in a ratchet manner. Nuts can be tightened by repeated operations.

Because the protruding engaging part 13 engages firmly with the disengaging step part 14 in this way, it is possible to securely tighten and release the nut without removing a wrench from the nut as in the case of a ratchet trench. This enables continuous rotational tightening, providing a wrench with excellent workability.

It is an ideal spanner for tightening a nut placed in the middle of a long connecting rod member at a temporary construction site.

In addition, structurally speaking, the base end 11' of the sliding lower jaw 11 is
slide slot 1 of the support part 3 through the fitting groove 16.
5, the sliding lower jaw 11 is prevented from sliding to the left or right and only allowed to slide up and down, and the protruding engaging portion 13 connected to the base end 11' of the sliding lower jaw 11 is attached to the mounting plate. Since it is locked to the engagement/disengagement step 14 on the second side, the engagement is securely performed without wobbling, and the sliding of the base end 11' of the sliding lower jaw 11 is also carried out by the spring 1.
It has excellent features such as being able to operate smoothly with the help of the spring action shown in FIG. 2, and having a simple structure that does not hinder mass production.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the product of the present invention, Fig. 2 is a front sectional view of the main parts to explain the operation of the product of the invention, and Fig. 3 is a front view of the main parts to explain the operation of the product of the invention. 4
The figure is a side sectional view of the main part of the product of the present invention, and Figure 5 is a front view of the conventional product. a...Natsuto, α...Angle, 1...Grip handle, 2
...Mounting plate, 3...Bearing part, 4...Upper jaw, 5...
Retaining plate, 6...Corner part, 11...Sliding lower jaw, 1
1'... Proximal end, 12... Spring, 13...
Projection engaging portion, 14... Disengagement step portion, 15... Slide split groove, 16... Fitting groove, 17... Spring hole.

Claims (1)

[Claims] 1. The upper corner part 6 of the holding plate 5 which holds the upper side of the nut a consisting of the upper jaw 4 and the supporting part 3 of the sliding lower jaw 11 is attached at a slight angle to the upper part of the mounting plate 2 which is connected to one end of the grip handle 1. A slide slot 15 is formed in the support part 3 of the holding plate 5 so as to rotate by α, and a slide slot 15 is formed from the lower end surface toward the center.
5, the base end 11' of the slide lower jaw 11 that faces the upper jaw 4 and holds the lower side of the nut a is fitted so as to be slidable up and down, and is supported in a fitting groove 16 provided in the base end 11'. Part 3 is fitted so that it cannot move left and right,
A spring hole 17 is formed in the retaining plate 5 above the upper surface of the base end 11' of the sliding lower jaw 11, a spring 12 is installed in the spring hole 17, and the upper part of the spring 12 is inserted into the upper part of the spring hole 17. The lower part of the sliding mandible 11 is fixed to the upper surface of the base end 11' of the sliding mandible 11, and the spring 12 is provided so that the sliding mandible 11 is constantly pulled toward the upper jaw 4 side.
is made to protrude from the side surface of the support part 3 on the side of the mounting plate 2 to form a protruding engagement part 13, and a disengagement step part 14 on which the protruding engagement part 13 engages and disengages is provided at the lower part of the opposite end face of the mounting plate 2. A spanner characterized in that a stopper gap l is formed to restrict the upward rotation angle range of the grip handle 1 to a slight angle α at which the engagement/disengagement step 14 disengages from the protruding engagement portion 13.