JPH0354852Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a ratchet trench in which the engagement opening of the wrench can be fitted onto an object to be tightened, such as a bolt or nut, from the side thereof. .

[Conventional technology]

Generally, a socket trench with a built-in ratchet mechanism is often used to rotate bolts, nuts, and other objects of different sizes.

[Problem that the invention attempts to solve]

Conventional socket trenches incorporating a ratchet mechanism are used by placing the socket portion over the object to be tightened, and this makes it difficult to turn the nuts in the middle of the pipe, which have different sizes.

[Means for solving problems]

The present invention solves these drawbacks, and its structure will be described in detail with reference to the accompanying drawings.

A ratchet mechanism 2 is provided on the wrench body 1, and an arm-shaped outer circumferential body 4 having a fitting recess 3 formed on the inner circumferential surface thereof is protruded from the distal end of the wrench body 1 on the left and right sides. The proximal end of an openable and closable outer circumferential body 7 having a fitting recess 6 formed on its inner peripheral surface is pivotally connected to the distal end portion 5 so as to be freely openable and closable, and the free distal end portion 8 of this openable and closable outer circumferential body 7 is connected to the other arm-shaped outer circumferential body 4. A detachable opening/closing mechanism 10 is provided which connects the distal end portion 9 of the detachable opening/closing mechanism 10, and the opening/closing outer circumferential body 7 closed by the detachable opening/closing mechanism 10 and both arm-shaped outer circumferential bodies 4 form an annular outer circumferential body. An engaging piece 16 having the same shape and having a locking tooth row 15 formed on its outer surface that engages the fitting recesses 3 and 6 on the circumferential surface and engages the locking hook 14 of the ratchet mechanism 2 is attached to each arm-shaped outer peripheral body. 4 and annularly arranged on the inner circumferential surface of the opening/closing outer peripheral body 7, and the inner surface 13 of each engaging piece 16 is connected to the entire circumferential surface 12 of the object 11 to be tightened such as a bolt or nut.
The engaging piece 16 is formed to have an annular inner surface such as a hexagonal surface that engages with the inner surface, and each engaging piece 16 is rotatable along each fitting recess 3, 6 of the arm-shaped outer circumferential body 4 and the opening/closing outer circumferential body 7. The present invention relates to a ratchet trench characterized by being provided with a ratchet trench.

[Effect]

Operate the attachment/detachment opening/closing mechanism 10 to rotate the opening/closing outer body 7 to open the outer body, and fit the engaging pieces 16 of the same shape onto the left and right arm-shaped outer body 4 and the opening/closing outer body 7, respectively, on their outer peripheral surfaces. It engages with the recesses 3 and 6 and is rotatably mounted in an annular shape.

The inner surface 13 of the engaging piece 16 arranged on the inner circumferential surface of the left and right arm-shaped outer circumferential bodies 7 of this wrench body 1 is engaged with the circumferential surface 12 of the object to be tightened 11, and in this engaged state, the engaging piece 16 in the opposite direction, and operate the detachable opening/closing mechanism 10 again to connect the free tip 8 of the opening/closing outer body 7 with the tip 9 of the other arm-shaped outer body 4, and then remove the outer body. is occluded in a circular manner.

In this state, when the handle of the wrench body 1 is rotated back and forth, the engaging hook 14 of the ratchet mechanism 2 will engage the locking tooth row 15 as long as it is engaged with the locking tooth row 15.
For this purpose, the engagement piece 16, which is supported in the fitting recesses 3 and 6 and arranged in an annular manner, rotates in one direction in the circumferential direction while remaining at rest.

As the engaging piece 16 rotates in the tightening direction, the object 11 to be tightened rotates.

To remove the wrench body 1 from the object 11 to be tightened, the detachable opening/closing mechanism 10 is operated in the opposite manner to that described above.

〔Example〕

A wrench body 1 is provided with a ratchet mechanism 2.

The ratchet mechanism 2 shown in the drawings has a cavity 17 formed at the base of the arm-shaped outer circumferential body 4 at the tip of the wrench body 1, which communicates both sides of the wrench body 1 and the inside of the arm-shaped outer circumferential body 4. The shaft 18 connects the protrusion 20, which has engaging hooks 14 at both corners of the side facing the arm-shaped outer circumferential body 4 and faces toward the handle 19 of the wrench body 1, to the handle 1.
A ratchet piece 21 is rotatably attached to the side facing the handle 19, and a protruding and retracting body 23 is inserted into a hole 22 formed in the handle 19, and the protruding part 20 is pushed out at its most protruding position by means of an extruding device 24. The positioning of the protrusion 20 for determining the direction of rotation of the object 11 is determined by the ratchet piece 2.
1, by pushing and turning the exposed portion 25 from the empty chamber 17.

A fitting recess 3 is provided on the inner peripheral surface of the tip of the wrench body 1.
An arm-shaped outer circumferential body 4 is formed to protrude from side to side.

The drawing shows the inner peripheral surface of each arm-shaped outer peripheral body 4.
The figure shows a case where a 240 degree arcuate fitting recess 3 is formed, and a guide groove 26 into which a protrusion 35 formed on the outer peripheral surface of the engagement piece 16 is fitted is formed on the peripheral edge of the fitting recess 3. It shows.

An opening/closing outer body 7 having a fitting recess 6 of the same shape formed on its inner peripheral surface is pivotally connected to one end 5 of the arm-shaped outer body 4 so as to be freely openable and closable.

In the figure, reference numeral 27 denotes a shaft bearing on the side of the arm-shaped outer circumferential body of a pivot shaft 28 formed at one end 5 of the arm-shaped outer circumferential body 4 and pivotally connects the arm-shaped outer circumferential body 4 and the opening/closing outer circumferential body 7; The opening/closing outer body side shaft bearing portion 30 of the shaft 28 is a guide groove formed in the opening/closing outer body 7 that guides the engagement piece 16 .

A detachable opening/closing mechanism 10 is provided which connects the free tip 8 of the opening/closing outer circumferential body 7 and the other tip 9 of the arm-shaped outer circumferential body 4.

In the figure, reference numeral 31 is a recessed rod that prevents the opening/closing outer peripheral body 7 from coming off the arm-shaped outer peripheral body 4, 32 is a guide hole for the retractable rod 31, and 33 is an extrusion rod that presses out the retractable rod 31 from the guide hole 32. The device 34 is an operation unit for operating the protrusion/retraction of the protrusion/retraction rod 31, and the drawings illustrate the attachment/detachment opening/closing mechanism 10 constituted by these elements.

Entire circumferential surface 1 of a fastened object 11 such as a bolt or nut
Three engaging pieces 16 of the same shape are formed, each having an inner surface 13 that engages with the ratchet mechanism 2 and a locking tooth row 15 that engages with the engaging hook 14 of the ratchet mechanism 2 on the outer surface.

The drawing shows approximately 120 mm of the hexagonal circumferential surface 12 of the object 11 to be fastened.
The guide grooves 26 and 30 have an inner surface 13 that engages with the guide grooves 26 and 30, and an outer surface that has a locking tooth row 15 that engages with the tip of the V-shaped locking hook 14 of the ratchet piece 2.
A set of three engaging pieces 16 having a protrusion 35 that engages is formed, and the two engaging pieces 16 are attached to the fitting recess 3 of the arm-shaped outer peripheral body 4, and one engaging piece 16 is opened and closed on the outer periphery. A case where it is attached to the fitting recess 6 of the body 7 is shown.

This engaging piece 16 is provided in each of the fitting recesses 3 and 6 of the arm-shaped outer circumferential body 4 and the opening/closing outer circumferential body 7 so as to be detachable and rotatable.

In the drawing, in order to attach and detach the engaging piece 16, the protrusion 35 is aligned with the guide groove 30 at the end of the fitting recess 3 on the other end portion 9 side with respect to the fitting recess 3 of the arm-shaped outer peripheral body 4. For the opening/closing outer peripheral body 7, align the protrusion 35 with the guide groove 30 at the end of the fitting recess 6 on the free tip 8 side, and then remove the engaging piece 16. The figure shows a configuration in which the device is inserted.

In addition, the outer portion 36 of the engagement piece 16 is slidably fitted into the arc-shaped gaps of the fitting recesses 3 and 6 of the arm-shaped outer body 4 and the opening/closing outer body 7 to be supported, thereby making the engagement piece 16 rotatable. The figure shows the case where the

Reference numeral 37 in the figure is a stabilizing device for the engaging piece 16.

[Effect of idea]

Since the present invention has the above-mentioned configuration, the opening/closing mechanism 10 is operated to rotate the opening/closing outer circumferential body 7 to open the outer circumferential body, and the left and right arm-shaped outer circumferential bodies 4 are opened and closed, respectively. Engagement pieces 16 of the same shape are attached with their outer circumferential surfaces engaged with the fitting recesses 3 and 6 so as to be rotatable in an annular shape. The inner surface 13 of the mating piece 16 is engaged with the circumferential surface 12 of the object to be fastened 11, and in the engaged state, the opening/closing outer circumferential body 7 with the engaging piece 16 is turned in the opposite direction, and the attaching/detaching opening/closing mechanism 10 is operated again. When the free tip 8 of the opening/closing outer body 7 and the tip 9 of the other arm-shaped outer body 7 are connected, and in this state, when the handle of the wrench body 1 is rotated back and forth, the ratchet mechanism 2 is locked. The hook 14 engages with the locking tooth row 15 as long as it engages with the locking tooth row 15.
5, the engagement piece 16 supported in the fitting recesses 3 and 6 and arranged in an annular manner rotates in one direction in the circumferential direction while remaining at rest.
The object to be tightened 11 is rotated in accordance with the tightening rotation.

Further, in the present invention, an outer circumferential body is constructed from left and right arm-shaped outer circumferential bodies 4 and an opening/closing outer circumferential body 7 that opens and closes, and engagement pieces 16 are provided in fitting recesses 3 and 6 formed on the inner circumferential surface of this outer circumferential body. Since the configuration is such that the entire circumferential surface 12 of the object 11 to be tightened is simply slid and arranged in an annular manner so as to completely cover the entire circumferential surface 12 of the object 11, 13 allows for tightening and rotation while completely enclosing the object 11, so the object 11 to be tightened does not come off or loosen, and can be easily rotated with strong force, making it an extremely practical lathe. It becomes an etsu trench.

Since all of the engaging pieces 16 are constructed with the same shape, mass production is excellent, and the engaging pieces 16 can be freely rotated by simply sliding them together without connecting them together. Since the engaging piece 16 is provided in the same position, excellent effects such as being able to easily replace the engaging piece 16 according to the diameter of the object 11 to be fastened are achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front sectional view, FIG. 2 is a side sectional view of the main part, and FIG. 3 is a perspective view of an engaging piece. 1...Wrench body, 2...Ratchet mechanism, 3
...Fitting recess, 4...Arm-shaped outer body, 5...Tip, 6...Fitting recess, 7...Opening/closing outer body, 8...
Free tip portion, 9...Tip portion, 10...Attachment/detaching opening/closing mechanism, 11...Tightened object, 12...Surrounding surface, 13...
Inner surface, 14...locking hook, 15...locking tooth row, 1
6...Engagement piece.

Claims (1)

[Scope of utility model registration request] A ratchet mechanism 2 is provided on the wrench body 1, and an arm-shaped outer circumferential body 4 having a fitting recess 3 formed on the inner circumferential surface thereof is protruded from the distal end of the wrench body 1 on the left and right sides. The proximal end of an openable and closable outer circumferential body 7 having a fitting recess 6 formed on its inner peripheral surface is pivotally connected to the distal end portion 5 so as to be freely openable and closable, and the free distal end portion 8 of this openable and closable outer circumferential body 7 is connected to the other arm-shaped outer circumferential body 4. A detachable opening/closing mechanism 10 is provided which connects the distal end portion 9 of the detachable opening/closing mechanism 10, and the opening/closing outer circumferential body 7 closed by the detachable opening/closing mechanism 10 and both arm-shaped outer circumferential bodies 4 form an annular outer circumferential body. An engaging piece 16 having the same shape and having a locking tooth row 15 formed on its outer surface that engages the fitting recesses 3 and 6 on the circumferential surface and engages the locking hook 14 of the ratchet mechanism 2 is attached to each arm-shaped outer peripheral body. 4 and annularly arranged on the inner circumferential surface of the opening/closing outer peripheral body 7, and the inner surface 13 of each engaging piece 16 is connected to the entire circumferential surface 12 of the object 11 to be tightened such as a bolt or nut.
The engaging piece 16 is formed to have an annular inner surface such as a hexagonal surface that engages with the inner surface, and each engaging piece 16 is rotatable along each fitting recess 3, 6 of the arm-shaped outer circumferential body 4 and the opening/closing outer circumferential body 7. The Rachietsu trench is characterized by the following: