JPH0524456Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention allows the workpiece to be moved from the clamped and fixed state by slightly twisting the vise shaft in the direction of loosening the workpiece, and then pulling it out in the direction of unclamping the workpiece. can move directly to the workpiece contact position again without any screw movement, and when the vise shaft is rotated in the tightening direction at the workpiece contact position, the male threaded part of the vise shaft engages with the half nut and the workpiece can be effectively tightened and fixed. This invention relates to a vise device such as a cutting machine that has tightening and quick release functions.

[Prior Art] Conventionally, there is a vise device such as a cutting machine that has quick tightening and quick release functions as disclosed in Japanese Utility Model Publication No. 1-18287.

[Problems to be Solved by the Invention] The vise device, such as a cutting machine, disclosed in Japanese Utility Model Publication No. 1-18287 has the following drawbacks.

In this vise device, when the vise shaft is rotated, the nut holder must reliably rotate together due to frictional force, but the co-rotating force input section of the nut holder applies a spring force using a pair of clamping pieces. Since the structure is such that the vise shaft is held between the two, when the vice shaft is twisted to unscrew the half nut (release nut as stated in the publication) and the vise shaft is moved in the axial direction, the pair of holding pieces There is a risk that the pair of clamping pieces will tilt away from the vise shaft, and if the pair of clamping pieces tilts, the release nut on the opposite side to the tilted one will bite into the male threaded part of the vise shaft, causing the vise shaft to twist in the opposite direction. However, the clamping piece is difficult to return to its normal position, making it difficult for the vise shaft to move smoothly in the axial direction, making the quick tightening and quick release functions less reliable.

If the clamping piece becomes rusted, worn, or the spring force weakens, the nut holder will no longer be able to input co-rotating force from the vise shaft, and the half nut will not move to the screwed position or unthreaded position even if the vise shaft is twisted. It will no longer have the quick tightening/quick release function.

The internal shape of the vise holder and the shapes of the parts are complicated, the assembly is complicated, the number of parts is large, and the manufacturing cost is high. To be more specific, the shape of the nut holder is complicated, requiring a large number of press forming steps, and two half nuts are required in order to balance the reaction force acting on the half nut depending on how well the nut holder fits. Furthermore, the recess inside the vise holder has a complicated shape.

This invention was devised in view of the above points,
When the vise shaft is twisted, the nut holder can obtain a sufficiently large co-rotating force from the vise shaft to reliably move the half nut to the screwed position or unscrewed position, and when the half nut is released from the vise shaft. The engagement posture of the nut holder with respect to the vise shaft does not tilt at all, and smooth axial movement of the vise shaft can be ensured.Furthermore, the internal shape of the vise holder and the shape of parts can be simplified, the number of parts can be reduced, The purpose is to provide a vise device such as a cutting machine that leads to a reduction in manufacturing costs.

[Means for Solving the Problems] According to the present invention, as means for solving the above-mentioned problems, there is provided a vise shaft 1 having a male threaded portion 1a, and the vise shaft 1 is inserted into a vise shaft insertion hole 2a and supported. A recess 2c having a cam surface 2b having a desired curved surface shape is recessed in the vice holder 2 from one side of the vise shaft insertion hole 2a, and a female threaded portion 3a is provided in the recess 2c. a half nut 3 whose face is directed toward the center of the vice shaft insertion hole 2a;
A nut holder 4 is housed in the nut holder 4, which holds the nut movably in the radial direction of the vice shaft 1 and engages in contact with the vice shaft 1, and when the vice shaft 1 is rotated in the tightening direction, the nut holder 4 Due to the frictional force with the vice shaft 1, the half nut 3 rotates in the recess 2c, and the half nut 3 rotates.
is pressed by the cam surface 2b and the vice shaft 1
In a vise device such as a cutting machine configured to be closely screwed into the external threaded portion 1a of the vise shaft 1, the nut holder 4 is configured to be attached to a portion of the vise shaft 1 that passes through the vise shaft insertion hole 2a. A split cylindrical co-rotating force input part 4a surrounding the opposite side of the recess 2c in a contact state, and the half nut 3 extending integrally from both ends of the co-rotating force input part 4a in parallel with each other in the direction of the recess 2c. The present invention provides a vise device such as a cutting machine, which is characterized by comprising a pair of flat half-nut clamping parts 4b for clamping one half-nut.

[Operation] When the vise shaft 1 is slightly twisted in the loosening direction from the tightened and fixed state of the work, the nut holder 4 will rotate together because the co-rotation force input part 4a is in contact with the vise shaft 1 over a large area. Then, the cam surface 2b separates from the half nut 3.
Therefore, when an attempt is made to pull out the vise shaft 1 in the direction of releasing the tightening of the workpiece, the half nut 3 separates from the male threaded portion 1a of the vise shaft 1, allowing the vise shaft 1 to be pulled out and moved. Since the input part 4a stably engages with the vise shaft 1 and the nut holder does not tilt as in the conventional case, the half nut 3 will not be screwed close to the vise shaft 1. Therefore, after replacing and installing the workpiece, The vice shaft 1 can be smoothly linearly moved again to the workpiece attaching position without any screw movement. Note that if the vice shaft 1 is translated while being twisted in the loosening direction, smoother translation can be performed in any direction.

Then, when the vise shaft 1 is rotated in the tightening direction at the workpiece contact position, the nut holder 4 rotates securely, and the half nut 3 is pressed against the cam surface 2b and passes through the recess 2a of the male threaded portion 1a of the vise shaft 1. Workpieces can be effectively tightened and fixed by closely screwing into parts.

[Example] The first example of the vise device such as a cutting machine of the present invention is described below.
This will be explained with reference to FIGS.

As shown in FIG. 1, in the vise device of this embodiment, such as a cutting machine, a fence 6 is fixed upright at one end of a base plate 5, and a vice holder 2 is installed at the other end of the base plate 5, facing the fence 6. The vise shaft 1, which is fixed upright and passed horizontally through the vise shaft insertion hole 2a of the vise holder 2, is attached to the workpiece receiving surface 6 of the fence 6.
It faces perpendicularly to a.

A grip 7 is provided at the outer end of the vice shaft 1, and a vice plate 8 is attached to the fence side end with screws 10, and the workpiece W
is sandwiched between the fence 6 and the vice plate 8.

The vice shaft 1 of this embodiment has a grip 7.
Approximately the entire length from the edge of the vise plate 8 to the edge of the vise plate 8 is a male threaded portion 1a, giving the vise device a maximum tightening stroke.

Inside the vise holder 2, a cam surface 2 having a desired curved shape is inserted from one side of the lower side of the vise shaft insertion hole 2a.
A recess 2c having a diameter b is provided, and in the recess 2c,
A half nut 3 with a female threaded portion 3a facing toward the center of the vice shaft insertion hole 2a, and a nut holder 4 that holds the half nut 3 movably in the radial direction of the vice shaft 1 and engages in contact with the vice shaft 1 are housed. A cover plate 9 having a vise shaft support hole 9a is fitted onto the vise shaft 1, closes the recess 2c, and is fastened and fixed with screws 11.

The length of the nut holder 4 in the vice shaft axial direction is the same as the length of the half nut 3 in the vice shaft axial direction, and is about 1 mm smaller than the length of the recess 2c in the vice shaft axial direction.

The diameter of the proximal end of the vise shaft insertion hole 2a is reduced by one step to form a vise shaft guide hole 2a' through which the vise shaft 1 is slidably inserted and supported. Therefore, the vice shaft 1 is supported in the vice shaft support hole 9a and the vice shaft guide hole 2a' so that it can be guided without wobbling.

The male threaded portion 1a of the vice shaft 1 is a right-handed thread, and correspondingly, the female threaded portion 3 of the half nut 3 is a right-handed thread.
A is also a right-handed screw with the same pitch. The half nut 3 has smooth surfaces 3b and 3c parallel to each other at both ends in the circumferential direction. A surface 3d of the half nut 3 opposite to the female threaded portion 3a is a convex cylindrical surface.

As shown in FIGS. 2 and 3, the cam surface 2b defining the recess 2c has a center of curvature centered at the center of the vice shaft 1, and the cam surface 2b has a curvature center as it goes in the direction of clockwise rotation of the vice shaft 1 (tightening direction). It is a spiral cylindrical surface whose radius of curvature gradually decreases over time (it may also be part of an eccentric cylindrical surface). And cam surface 2
Half nut 3 at one end of b with larger radius of curvature
The larger radius of curvature of the cam surface 2b is set such that when the half nut 3 is brought into a close position, the female threaded portion 3a of the half nut 3 is completely released from the threaded engagement with the male threaded portion 1a of the vice shaft 1, although it is slightly larger. is set, and when the half nut 3 is placed in close contact with one end of the cam surface 2b having a smaller radius of curvature, the female threaded portion 3a of the half nut 3 is completely screwed into the male threaded portion 1a of the vice shaft 1. The smaller radius of curvature of the cam surface 2b is set as follows.

The nut holder 4 has a single unit shape as shown in FIG. 4, and has a split tube that surrounds a portion of the vise shaft 1 that passes through the vise shaft insertion hole 2a on the opposite side of the recess 2c. a pair of flat plate-shaped half-nut clamping parts that are integrally extended from both ends of the parallel force input part 4a in parallel to each other in the direction of the recess 2c and clamp each of the half nuts 3; 4b, and can be press-formed from a rust-free steel plate with a thickness of 0.5 mm, for example.

The co-rotating force input part 4a has an inner surface radius of curvature that is large enough to fit loosely into the vise shaft 1, and has a split cylinder shape that surrounds the vise shaft 1 by approximately 270 degrees, and has a radius of curvature that is large enough to fit loosely into the vise shaft 1. The vise shaft insertion hole 2 is in a non-contact state with a small gap between the
It is housed in a. In addition, the co-rotating force input section 4
a is positioned in a non-squeezed state between the cover plate 9 and the inner step of the vice shaft guide hole 2a'. Therefore, the co-rotating force input section 4a is configured to reliably input the co-rotating force from the vice shaft 1 when the vice shaft 1 is rotated.
The vise shaft 1 stops in contact with both ends of the recess 2c.
To compensate for the rotation of the vice shaft 1 without applying excessive resistance in the axial and circumferential directions.

And a pair of half nut clamping parts 4b, 4b
extend integrally so as to enter parallel to each other into the recessed part 2c from both ends of the co-rotating force input part 4a,
The smooth surfaces 3b and 3c at both ends of the half nut 3 are clamped without wobbling to regulate the position of the half nut 3 within the recess 2c. The half-nut clamping parts 4b, 4b of this embodiment are the co-rotating force input part 4a.
Since it has the same length and extends from both ends of the co-rotating force input part 4a, a sufficiently large bending part strength is ensured.
Even if the movement of the half nut 3 in the inner circumferential direction of the recess 2c is repeated infinitely, the interval does not increase, the initial parallelism is ensured, and the function of smoothly guiding the half nut 3 can be compensated semi-permanently.

The operation of the embodiment configured as described above is the same as that described in detail in the [Operation] section, so a description thereof will be omitted.

Note that the vise device such as a cutting machine according to the present invention is
This also applies when the vise shaft is installed with the vertical axis.

The cam surface 2b is composed of a magnet, and when the half nut is unscrewed, it attracts the half nut and reliably separates it from the vise shaft, so that the half nut can be reliably unscrewed even under the action of vibration or gravity. This is preferable because it eliminates the sound of the screws meshing with each other when the vice shaft is moved directly.

[Effects of the invention] As explained above, according to the vise device of the cutting machine or the like according to the present invention, the nut holder is connected to the split cylinder-shaped part that surrounds the part of the vise shaft that passes through the vise shaft insertion hole in a state of contact. The structure consists of a co-rotating force input section and a pair of flat half-nut clamping sections that are integrally extended from both ends of the co-rotating force input section in parallel to each other and clamp each half nut, so that the vice shaft cannot be twisted. When the half nut is screwed, the input of the co-rotating force is reliably obtained at the co-rotating force input part, the nut holder is reliably co-rotating, and the half nut can be reliably moved to the screwed position or the unscrewed position. Since the co-rotating force input part stably holds the vice shaft, when the half nut is separated from the vice shaft, the engagement posture of the nut holder with respect to the vice shaft does not tilt at all, and the pair of flat half nut holding parts Since the half nuts are held in parallel, smooth movement of the half nuts is guaranteed, and smooth axial movement of the vice shaft can be guaranteed.

Further, according to the vise device such as a cutting machine according to the present invention, the internal shape of the vise holder and the shape of the parts can be simplified, the number of parts can be reduced, and manufacturing costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a vise device such as a cutting machine according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional front view of a vise device such as a cutting machine etc. in a tightened state in FIG. 1.
FIG. 3 is an enlarged sectional view of FIG. 1 in a state where the vise device such as the cutting machine is unfastened, and FIG. 4 shows a nut holder which is a main component of the present invention. FIG. 1...Vise shaft, 1a...Male thread part, 2
... Vise holder, 2a ... Vise shaft insertion hole, 2b ... Cam surface, 2c ... Recess, 3 ... Half nut, 3a ... Female thread part, 4 ... Nut holder, 4a ... Co-rotating force input part, 4b...Half nut clamping part.

Claims (1)

[Claim for Utility Model Registration] It has a vise shaft having a male thread, and a vise holder that supports the vise shaft by inserting it into the vise shaft insertion hole. A recessed portion having a cam surface having a desired curved surface shape is provided in the recessed portion, and a half nut whose female threaded portion faces toward the center of the vice shaft insertion hole, and the half nut is held in the recessed portion so as to be movable in the radial direction of the vice shaft. and a nut holder that contacts and engages with the vice shaft is accommodated, and when the vice shaft is rotated in the tightening direction, the nut holder rotates within the recess due to frictional force with the vice shaft and holds the half nut. In a vise device such as a cutting machine configured to rotate so that the half nut is pressed against the cam surface and screwed close to the male threaded portion of the vise shaft, the nut holder is inserted into the vise shaft of the vise shaft. For a portion passing through the hole, a split cylinder-shaped co-rotating force input portion surrounding the opposite side of the portion in contact with the recess, and parallel to each other from both ends of the co-rotating force input portion toward the recess. A vice device for a cutting machine or the like, characterized in that it comprises a pair of flat half-nut clamping parts that extend integrally and clamp the half nuts one by one.