JPS5920940Y2 - Vise with rotating claw - Google Patents

Description

[Detailed explanation of the idea] This proposal relates to a rotating vise.

A conventional vise with a rotating claw is provided with a substantially semicircular recess on one side of the rotating claw and a support body supporting the rotating claw, and a substantially semicircular convex portion protruding into the recess on the other side. A convex part is tightly fitted into a concave part, and the two are connected freely by a pin, and the rotating claw rotates around the pin when the approximately semicircular convex part and the approximately semicircular concave part are in full contact with each other. Therefore, there is a drawback that the frictional resistance is large, and when the material is clamped, the rotating claw does not rotate to a predetermined position due to the weight of the material.

For this purpose, it is necessary to apply a pressing force to the rotating claw or the material between the rotating claws to rotate the rotating claw to a predetermined position, and it is necessary to apply pressing force each time the rotating claw grips a material. This has the drawback of being extremely troublesome and reducing work efficiency.

Further, as mentioned above, since the substantially semicircular convex portion and the substantially semicircular concave portion are in full contact with each other, they are prone to wear and have the disadvantage that accuracy cannot be maintained for a long period of time.

In order to eliminate this drawback, a gap may be formed between the substantially semicircular concave portion and the substantially semicircular convex portion to create a structure that does not generate frictional resistance when the rotating claw rotates. When a gap is formed, the rotating claw and the material will vibrate slightly when cutting the material, making it impossible to perform heavy cutting or high-precision cutting, and may cause damage to the cutter. There are drawbacks.

In addition, there is an invention disclosed in Japanese Patent Application Laid-open No. 51-51100 as a shaft clamping device, in which a cam disc is rotatably supported on a support base via a rotation shaft, and the cam disc is When chucking, the cam disc is supported on the rotating shaft, and the locking adjustment piece provided on the cam disc is supported in contact with the corner of the support base, and there is a notch in the upper part of the support base that requires particularly strong supporting force. Because of this, the upper part of the cam disc does not come in contact with the support base, and the supporting force is insufficient due to the small contact area with the support base.As with the conventional vise with rotating claws, the cam disc and material vibrate slightly, making it difficult to perform heavy cutting. However, there are disadvantages such as not being able to cut with high precision and causing damage to the cutter.

Another disadvantage is that when the material is removed, the cam disk falls and the contact and locking portions of the cam disk and the support are damaged.

Also, since the cam disk is moving downward in the material equipment,
There are inconveniences such as the need to lift the device by hand and put it on.

The present invention was devised in view of this point, and the purpose of the present invention is to remove the material without the need to apply pressing force to the rotating claw or the material inserted between the rotating claws, and without the rotating claw receiving frictional resistance. A rotating claw that can be held and rotated to a predetermined position to improve the work efficiency of loading and unloading materials, and the contact part does not wear out, and the rotating claw and the material do not vibrate slightly when cutting the material. The purpose is to provide a vise with a

Therefore, in order to achieve the above-mentioned purpose, the present invention provides a base whose upper surface is flat and smooth, and a pair of supports whose inner surfaces are vertical, which move in opposite directions. A rotating mounting vise equipped with a rotatable pawl rotatably supported, wherein the lower surface of the rotary pawl is a horizontal surface that is in face-to-face contact with the flat, smooth surface, and the outer surface is supported by the support. The vertical surface is in contact with the inner surface of the body, and on either the rotating attachment or the support body, there are four approximately semicircular parts with a part flattened. On the other hand, a substantially perfect circular convex portion is formed on the other side, which is concentric with the recessed portion, has approximately the same diameter, is approximately semicircular, and has a flat surface partially in face-to-face contact with the flat surface. , the concave portion and the convex portion are fitted together, the rotary pawl is rotatably supported on a shaft whose center is located above the core of the concave portion, and a space between the rotary pawl and the support body is provided. A tension spring is tensioned on the rotating claw, and when the rotating claw stops rotating, the convex portion and the recessed portion are brought into substantially full contact with each other, and the lower surface of the rotating claw is brought into contact with the flat, smooth surface of the base, and the rotating claw The main feature is that the outer surface of the support body is configured so that the flat surface of the convex portion is in contact with the flat surface of the concave portion, and the flat surface of the convex portion is in contact with the flat surface of the concave portion.

Next, an embodiment of the present invention will be described based on the drawings.

Reference numeral 1 denotes a support body, which is a substantially U-shaped member having a pair of protruding pieces 2.3 formed at both ends thereof, and has a substantially semicircular and substantially perfect circular recess 5 in the upper portion continuing from the bottom surface 4. or furthermore, the recess 5 forms a flat surface 6 of a required width extending in the lateral direction (axial direction) so as to be continuous with the recess 5 at the upper horizontal tangent line and below, and furthermore, the protruding piece 2 , 3 are formed with a pair of opposing through holes 7.

Therefore, the center 8 of the through hole 7 is located directly above or diagonally above the center 9 of the recess 5 with a slight gap therebetween.

Further, a projection 10 projecting upward is formed on the top surface, and one end of a tension spring, which will be described later, is latched onto the projection 10.

Further, the support 1 may have a structure as shown in FIG.

That is, on the inner upper part of the rectangular parallelepiped member, a substantially semicircular convex part 12 extending in the horizontal direction with a notch 24 formed in a part of the outer peripheral surface near the upper part of the protrusion 12 is formed; At the lower part of the outer periphery of the convex part 12, in the longitudinal direction (axial direction) of the convex part 12, so as to be located below the horizontal tangent of the convex part 12.
This forms a flat surface 13 with a required width extending to .

Note that the cutout 24 is provided as necessary.

Further, between the upper surface of the rectangular parallelepiped and the base of the upper outer peripheral surface of the convex portion 12, an inclined surface 14 is formed, for example, at an angle of 45 degrees, and a protrusion 10 that projects upward is formed on the upper surface. .

Further, a through hole 17 is formed in the convex portion 12, with the center 16 at a point directly above or diagonally above the center 15 of the convex portion 12 with a slight gap.

Next, we will explain the set of two rotating claws that are rotatably mounted on the support 1. First, we will explain the rotating claw A on one side that is mounted on the support 1 shown in FIG. This will be explained based on FIG.

Reference numeral 18 denotes a rotary claw main body, and the inner surface of the main body 18 is formed with gripping surfaces 19 and 20 having a substantially horizontal square shape, and a lower gripping surface 20 is formed.
A recess 21 is formed at the center in the width direction.

Further, a convex portion 23 is integrally formed on the vertically upper portion of the vertically shaped outer surface 22, extending in the horizontal direction, in other words, concentrically with the concave portion 5 and having approximately the same diameter. The shape of the convex part 23 is approximately semicircular, and a part of the upper part near the base thereof is a notch 24a. It is formed into a substantially perfect circular shape with a flat surface 25 of a required width extending horizontally on the outside of a (in the opposite direction to the clamping surface).

Therefore, the flat surface 25 is formed below the horizontal tangent to the upper outer circumference of the convex portion 23.

Also, between the inner end of the notch 24a (end in the direction of the clamping surface) and the upper end surface of the rotary claw main body 18, there is formed an inclined surface 26 inclined at, for example, 45 degrees.

Note that the notch 24a is provided as necessary;
When 4a is provided, the rotating claw A can smoothly rotate with respect to the support 1.

In addition, a through hole 29 is formed in the convex portion 23, with the center 28 at a point with a slight gap, either directly above or diagonally above the center 27 of the convex portion 23. A protrusion 30 protruding upward is formed on one surface.

The vertical length of the rotating claw main body 18 is such that when the main body grips a material and rotates downward, its lower surface 31 comes into face-to-face contact with a flat, smooth surface 46 of a base, which will be described later. At the same time, a portion of the lower surface 31 is formed into an arcuate surface 32 so that the flat, smooth surface 46 does not impede the rotation of the rotating claw main body 18.

Next, the rotating claw B on the other side will be explained based on FIG. 4.

Reference numeral 33 denotes a rotating claw main body, and the inner surface of the main body 33 is formed with holding surfaces 34 and 35 that are approximately horizontally V-shaped, and a lower holding surface 35 is formed.
The width is such that it can fit into the recess 21 of the rotating claws A, so that the clamping surfaces provided on the rotating claws A and B can be moved upward by rotating the rotating claws A and B upward. In other words, when the clamping surface 35 is opened in the direction, the clamping surface 35 does not protrude into the recess 21 and obstruct the rotation of the rotating claws A and B. In other words, the clamping surface 35 is brought close enough to the rotating claws A and B to clamp a small-diameter material. The other structure is the same as that of the rotating claw A.

Next, the two sets of rotating claws C and D that are rotatably attached to the support 1 shown in FIG. 2 will be explained.
First, the rotating claw C will be explained based on FIG.

Reference numeral 36 denotes a rotating claw body, and on the upper part of the vertical outer surface 22 of the main body 36, there is a substantially semicircular shape that is concentric with and has substantially the same diameter as the convex portion 12 shown in FIG. Four substantially circular portions 37 extending in the horizontal direction are formed, or, as shown in the figure, the lower part of the inner peripheral surface on the open side of the recess 37 is formed so as to come into contact with the flat surface 13 formed on the support 1. At the same time, a pair of opposing through holes 41 are formed with the center 40 at a point directly above or diagonally above the center 39 of the recess 37 with a slight gap between them.

The inside of the rotating claw main body 36 has the same structure as the rotating claw A shown in FIG. 3, and a projection 30 that projects upward is formed on the upper surface.

Next, the rotating pawl will be explained based on FIG. 6.

Reference numeral 42 denotes a rotating claw main body, and the inside of the main body 42 has the same structure as the rotating claw B shown in FIG. It has the same structure as the rotating claw C shown in .

Further, a projection 30 projecting upward is formed on the upper surface.

Thus, the inner surface of the rotating claw is each rotating claw A.

As shown in B, C, and D, the clamping surfaces do not need to have a special structure as described above, but may have the same structure as the clamping surfaces having a substantially horizontal square shape, or even a surface capable of clamping the material.

Therefore, the rotating claws A and B configured as described above are inserted into the through holes 7 of the pair of supports 1 and the through holes 29 provided in the rotating claws, as shown in FIG. 7, with their clamping surfaces facing each other. It is rotatably pivotally connected to the support body 1 via a shaft 43, and the protrusions 10 and 3
The tension spring 44 provided between the 0 and 10 points always exerts an upward force.

Also, the rotating claws C and D are not shown in the drawings, but are rotated to the support body 1 through shafts inserted through the through holes 17 of the support body 1 shown in FIG. 2 and the through holes 41 formed in the rotating claws. It is movably pivoted and always receives an upward force from a pull spring provided between the protrusion 10 provided on the support body 1 and the protrusion 30 provided on the rotating pawl.

In other words, the convex portion 12 provided on the support body 1 and the concave portions 37 of the rotary claws C and D formed concentrically are fitted in a rotatable manner so that the rotary claws are aligned with respect to the center 39 of the concave portion. It is constructed so that it rotates about a shaft that is provided directly above or diagonally above with a slight gap.

The support body 1, which rotatably supports the rotary claw as described above, can be screwed forward or backward on the base as shown in FIGS. 7 and 8, for example. The spiral claws act as if they are holding the material in place.

That is, 45 is a base having a substantially convex shape, and the upper surface of the base 45 is made into a flat and smooth surface 46 so that the lower surface 31 of the rotary claw comes into face-to-face contact, and the longitudinal direction of the base 45 is A substantially circular linear sliding hole 48 is formed so as to be continuous with the flat, smooth surface 46, and into which a supporting body 47 (to be described later) slides.

Thus, the support body 47 has a substantially cylindrical portion 49 at the lower part, the upper support 1 is integrally formed, and a screw hole 50 is provided in the axial direction at the center of the substantially cylindrical portion 49. The substantially cylindrical portion 49 is slidably fitted into the sliding hole 48 .

Thus, two support bodies 47 are disposed opposite to each other as described above with a gap between them on the base 45.

Reference numeral 51 denotes a threaded rod screwed into the threaded hole 50, and the threaded rod 51 has threads formed in opposite directions on both sides with the center in the longitudinal direction as the center. The pair of support bodies 47 are configured to move in opposite directions at a constant speed, in other words, the supports 1 are moved toward each other or away from each other, and the pair of supports 1 are moved in the direction toward each other. The material is screwed forward, and the material is clamped and held by rotating claws provided on the support body 1.

Incidentally, in the above description, a case has been described in which the pair of rotating claws both move in opposite directions, but it goes without saying that one side may be fixed and only the other side may move.

Next, the protrusions 23 of the rotating claws A and B are rotatably fitted into the four parts 5 formed on the support 1, and the through holes 7 The operation and effect will be explained mainly based on FIGS. 7 and 9, taking as an example the case where the rotating claws A and B are rotated via the shaft 43 inserted through the shafts 43 and 29.

Due to the action of the tension spring 44 provided between the protrusions 10 and 30, the rotating claws A and B are moved as shown by the imaginary lines in Figure 9 (However, since rotating claw A operates in the same manner as rotating claw B, the explanation will be omitted. ) Rotate upward approximately 45 degrees.

At this time, the inclined surface 26 comes into contact with the upper part of the inner surface of the support body 1, and the rotating claw B does not rotate any more.

In this state, when the threading rod 51 is rotated to move the rotating claw B toward the center to a predetermined position and a material is inserted between the rotating claws A and B, the weight of the material and the rotating claw B is Overcoming the tensile force of the pull spring 44, the rotating claw B has its lower surface 31 pressed against the flat, smooth surface 46 of the base 45, and the outer surface 2 of the rotating claw B.
2 comes into contact with the inner surface of the support 1, and the rotating claw B stops rotating.

At this time of stopping, the outer surface of the substantially perfect circular convex portion 23, which is concentric with the concave portion and has approximately the same diameter, comes into full contact with the curved surface of the concave portion 5.

Further, since the flat surface 6 is formed on the support body 1, the flat surface 25 formed on the rotary claw faces the flat surface 6 and is in full contact with the flat surface 6.

In this state, turn the rotating claw A again. B is moved toward the center, and the material is clamped and fixed by the clamping surfaces 19, 20, 34, and 35.

At this time, the rotating claws A and B have their outer surfaces 22 on the inner surface of the support 1 and their lower surfaces 3 on the base 45, respectively, as described above.
Since the convex portion 23 is in face-to-face contact with the flat smooth surface 46 of the recess 5, and the flat surface 6 and the flat surface 25 are in face-to-face contact, the rotating claws A and B are connected to the support 1, in other words, the base. 45, it is possible to accurately cut the material, for example, without vibration of the rotary claws A and B, as well as the material when cutting the material.

When the cutting work is finished, the threaded rod 51 is rotated in the opposite direction to open the space between the rotating claws A and B.
The cut material is then removed.

At the same time, the tensile force of the pull spring 44 causes the rotating claw B to
automatically returns to the position shown by the imaginary line in FIG. Since it rotates via the shaft 43 about a position with a slight gap diagonally above, the rotating claw B rotates in the direction in which the outer surface of the convex portion 23 and the inner surface of the concave portion 5 are separated, and the aforementioned convex portion 23 is not subjected to any frictional resistance on the inner surface of the recess 5 and returns to the above-mentioned position very easily.

As the rotating claw B rotates about the shaft 43 as described above, the convex portion 23 rotates while moving inwardly and upwardly.
As a result, the gap between a part of the outer circumferential surface of the convex part 23 and the inner circumferential surface of the recessed part 5 becomes narrow, and there is a risk that they may come into contact with each other, which may impede rotation. 24a, the rotating pawl B is not subjected to frictional resistance and returns (rotates) smoothly.

That is, since the convex portion 23, in other words the rotating claws A and B, do not receive any frictional resistance on the inner surface of the concave portion 5, the tension spring 44 may be a spring with a weak tensile force.

Conversely, when clamping materials, the rotating claws A,
B. Also, the claws do not need to apply pressing force to the material held by the claws and can be clamped and rotated to a predetermined position, improving the efficiency of the work of attaching and detaching the material, and also saves the worker's labor. It is possible to measure the reduction.

Thus, the support 1 having the convex portions 12 shown in FIG.
6, the rotary pawl formed with the recess 37 shown in FIG. 6 is attached to the shaft 4.
3, and when the rotating claw rotates upward, the rotating claw rotates in a direction away from the outer peripheral surface of the convex portion 12, so the rotating claw is caused by friction. It rotates smoothly without being subjected to resistance, and since the notch 24 is provided in the convex portion 12 as described above, the rotary pawl rotates smoothly in the same way as the rotary pawl B.

Also, when the rotating claw holding the material rotates downward, the gap between the convex portion 12 and the recess 37 gradually narrows as the rotating claw descends, and the outer surface 22 of the rotating claw gradually narrows. When it comes into contact with the inner surface of the support 1 and stops, the outer circumferential surface of the protrusion 12 is in full contact with the inner surface of the recess 37, resulting in the same state as in the previous embodiment, and the rotating claw is firmly fixed by the support and the base. There is no need to worry about vibration of the rotating claw or the material when cutting the material.

In addition, at the beginning of the upward rotation of the rotating claw and at the end of the downward rotation, for example, the gap between the outer circumferential surface of the convex part 12 and the recessed part 37 is minimized, and there is no risk that the two will come into contact with each other. Because there is, the second
As shown in the figure, it is advantageous to form a notch 11 in a portion of the lower outer periphery of the convex portion 12 near the base to prevent contact.

Since the proposed bis with a rotating claw or the structure as described above, there is no friction between the convex part and the concave part when the rotating claw rotates, and the rotating claw can smoothly rotate. There is no need for pressing work, and there is no abrasion between the convex and concave parts.Furthermore, when the rotary claw is cutting, the convex and concave parts are in full contact with each other, and the inner surface of the support and the base are removed. Since it is supported by the flat, smooth surface of the table, and even by the flat surface, the support is strong and no slight vibrations occur, making it possible to perform not only heavy cutting but also high precision cutting.

In addition, since a tension spring is provided between the rotary claw and the support body, when the material to be cut is removed, the tension spring applies a force in the removal direction and the material to be cut can be taken out easily. During installation, the weight is stretched and the spring is reduced, so the rotating claw comes into soft face-to-face contact with the support, flat, smooth surface, and each contact surface, which is a remarkable feature that prevents damage to each of the above-mentioned parts. It is effective.

[Brief explanation of drawings]

The drawings show one embodiment of the vise with rotating claws of the present invention, FIG. 1 is a perspective view of the support body, FIG. 2 is a perspective view of another embodiment of the support body, and FIG. 3 is a perspective view of the rotating claws. , Figures 4, 5 and 6
The figure is a slope view of another rotating claw, Figure 7 is an explanatory diagram of the state of use with some parts omitted and a part shown in cross section, Figure 8 is a sectional view taken along the line AA in Figure 7, and Figure 9 is an operation diagram. FIG. A-D...Rotation diagram, 1...Support, 5
...Concave portion, 23...Convex portion, 24...
...notch, 43...shaft.

Claims (1)

[Scope of utility model registration request] A pair of supports that move in opposite directions and whose inner surfaces are vertical surfaces are provided on a base whose upper surface is flat and flat, and a rotating claw is rotatably supported on the support. A vice with a rotating claw, wherein the lower surface of the rotating claw is a horizontal surface that contacts the flat and smooth surface, and the vertical surface is a vertical surface that contacts the inner surface of the support body. With,
A substantially semicircular recess with a part flattened and a substantially perfect circular shape is formed on either the rotating mounting or the support, while a recess concentric with the recess is formed on the other side. Approximately semicircular with approximately the same diameter,
and forming a substantially circular convex portion with a flat surface in face-to-face contact with the flat surface, the concave portion and the convex portion are fitted, and the rotating claw is positioned above the core of the concave portion. The rotating claw is rotatably supported by a shaft on which the center is located, and a tension spring is provided between the rotating claw and the support body, so that when the rotating claw stops rotating, the rotating claw is rotated. The lower surface is in face-to-face contact with the flat, smooth surface, the outer surface of the rotating claw is in face-to-face contact with the inner surface of the support, and the flat surface of the convex portion is in face-to-face contact with the flat surface of the recess. A vise with rotating claws.