JP2001334474A - Stock vice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stock vice for performing easy and reliable work clamping operation. SOLUTION: A fixed clamp 2 is provided at one end of an iron base 3 and a movable clamp 5 is provided to be movable forward and backward relative to the fixed clamp 2. The movable clamp 5 has a built-in permanent magnet and changing means 7 for changing the attracting motion of the permanent magnet to the base 3 between a ON-state and an OFF-state. The movable clamp 5 in the state of clamping a work with the fixed clamp 2 is attracted and fixed to the base 3 by turning the changing means 7 into the ON-state. The movable clamp 5 has a thrusting tool 32 movable forward to thrust the work to the fixed clamp 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vise, and more particularly, when a work is clamped between a fixed clamp and a movable clamp, the movable clamp is slid on a base. The fixed holding body can be easily approached, and the approaching state can be fixed to the base by the attracting action of the permanent magnet, and then, between the fixed holding body and the movable holding body by a pressing tool provided on the movable holding body. It is related to a vice that can clamp a work.

[0002]

2. Description of the Related Art The most basic structure of a vise used for holding a work is, for example, as shown in a vise, a holding piece arranged opposite to one another (movable piece) on the other side. (Fixed piece) so that it can advance and retreat,
A helical shaft is connected to the movable side, and the helical shaft is rotated by a lever to move the movable piece toward the fixed piece, thereby clamping the work between the two clamping pieces and fixing the position. .

In the case of such a primitive vise, when the work to be clamped is small, there has been a problem that the lever must be rotated many times. Therefore, the movable piece is temporarily slid to a position approximate to the size of the work, and the position is fixed, and the remaining movement for clamping is manually rotated by a helical shaft or hydraulically or by an air cylinder. A configuration has been proposed in which this is performed by mechanical means. For this purpose, it is necessary to temporarily fix the movable jaw near the clamping position, and as one of the means, as shown in FIG. 15, a method of inserting and removing a fixing pin c between the base a and the movable jaw b is adopted. Have been.

Accordingly, an insertion hole d through which a fixing pin is inserted
In the sliding range of the movable jaw, it is necessary to provide a large number on the base side, but there is also an economic limit for mechanical strength and processing, and it can only be drilled at intervals of about 100 mm at most. . Therefore, the movable distance for the remaining clamping needs to be 100 mm or more, and a relatively large stroke hydraulic or air cylinder or the like is required.

[0005]

SUMMARY OF THE INVENTION The present invention has been developed in view of the above-mentioned problems, and it is possible to easily and reliably perform an operation for clamping a work between a fixed clamping member and a movable clamping member. The purpose is to provide a vice that can be used.

[0006]

The present invention employs the following means to solve the above-mentioned problems. That is, in the vise according to the present invention, a movable holding member is provided on a steel base provided with a fixed holding member so that the movable holding member can move forward and backward with respect to the fixed holding member. Switching means for switching the operation of attracting the permanent magnet to the base is provided. The switching means radiates the magnetic flux generated by the permanent magnet on the lower surface of the movable holding body and causes the magnetic flux to act on the base, thereby bringing the movable holding body into a state of being attracted to the upper surface of the base at the lower surface thereof. As a result, switching between the ON state in which the movable holding body is fixed to the base and the OFF state in which the magnetic flux generated by the permanent magnet is closed inside to prevent the magnetic flux from acting on the base, thereby releasing the attracted state. It is composed. The movable holding member, which is in a state of holding the work between the fixed holding member and the fixed holding member, is attracted and fixed to the base by the on state of the switching means. It is characterized by having a pressing tool which can advance so as to press the work toward the fixed holding body.

In another aspect of the vise according to the present invention, a movable holding member is provided on an iron base provided with a fixed holding member so as to be able to advance and retreat with respect to the fixed holding member.
Switching means is provided which has a built-in permanent magnet and switches the operation of attracting the permanent magnet to the base.
On the lower surface of the movable holding body, a trapezoidal concave groove having a larger inlet groove width is provided, and the left and right opposed inner slopes of the concave groove are smooth inclined surfaces inclined inward. In addition, on the upper part of the base, an inclined outer surface capable of making surface contact with the left and right inclined inner surfaces is provided on the left and right, and a fitting projection having a trapezoidal cross section that is fitted into the concave groove is provided. The smooth upper surface of the fitting projection is provided so as to approach the smooth bottom surface of the concave groove in the surface contact state. Further, the switching means radiates the magnetic flux generated by the permanent magnet on the lower surface of the movable holding member, and applies the magnetic flux to the smooth upper surface of the fitting projection to thereby move the movable holding member on the lower surface. The upper surface of the fitting projection is attracted, whereby the movable holding body is fixed to the base in the ON state, and the magnetic flux generated by the permanent magnet is closed inside to make a magnetic flux act on the upper surface of the fitting projection. Instead, the configuration is such that the off state is switched to release the suction state. The movable holding member, which is in a state where the work is held between the fixed holding member and the fixed holding member, is attracted and fixed to the base by turning on the switching means. It is characterized by having a pressing tool which can advance so as to press the work toward the fixed holding body.

[0008] In another aspect of the vice according to the present invention,
A movable holding body is provided on the iron base provided with the fixed holding body so as to be able to advance and retreat with respect to the fixed holding body. The movable holding body has a built-in permanent magnet and an operation of attracting the permanent magnet to the base. Is provided. The upper surface of the base is provided with a trapezoidal concave groove extending in the longitudinal direction of the base and having a larger inlet groove width, and the left and right inclined inner side surfaces of the concave groove are inward. The movable holding body is provided with left and right inclined outer surfaces capable of making surface contact with the left and right inclined inner surfaces, and has a trapezoidal cross section fitted into the concave groove. In this state, the smooth lower surface of the fitting protrusion comes close to the smooth bottom surface of the concave groove in the surface contact state. Further, the switching means radiates a magnetic flux generated by the permanent magnet on a lower surface of the fitting projection and applies a magnetic flux to a smooth bottom surface of the concave groove, thereby moving the movable holding body on the lower surface of the movable holding member. An attraction state is provided on the bottom surface of the groove, whereby the movable holding body is fixed to the base in an ON state, and the magnetic flux generated by the permanent magnet is closed internally so that no magnetic flux acts on the bottom surface of the concave groove. The configuration is such that the off state is switched to release the suction state. And, the movable holding body in a state where the work is held between the fixed holding body and the fixed holding body,
When the switching means is turned on, the movable holding body is provided with a pressing tool which can be advanced so as to press the work toward the fixed holding body. It is assumed that.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] Referring to FIGS. 1 and 2 and FIGS. 3 and 4, a vise 1 according to the present invention is mounted on an iron base 3 on which a fixed holding member 2 is provided. A movable holding member 5 is provided, and a permanent magnet 6 is built in the movable holding member 5 and a switching means 7 for switching the operation of attracting the permanent magnet 6 to the base 3 is provided on the movable holding member 5. It is.

The base 3 has an upper surface 9 which is a smooth surface, and the base 3 has a base 3 on both sides in the longitudinal center.
Along the length direction, rectangular recessed grooves 10, 10 are provided so as to face left and right, and the fixed holding body 2 is fixed to the front end side of the base 3.

The movable holding member 5 is, as shown in FIG.
On both sides of the main body 11 mounted on the upper surface 9 of the base, side pieces 15, 15 whose inner surface 12 can contact the side surface 13 of the base.
At the lower end of the side pieces 15, engagement projections 17, 17 that can come into contact with the groove side faces 16, 16 above the concave grooves 10, 10 are provided.

The movable holding body 5 having such a structure has its smooth lower surface 19 mounted on the upper surface 9 of the base 3 and can slide in the longitudinal direction of the base 3.
The movable holding member 5 is prevented from floating by contacting the groove side surfaces 16 and 16 above the concave groove.

In the present embodiment, the permanent magnet 6 built in the movable holding member 5 is, as shown in FIGS.
It is provided on a movable holder 18 that can move back and forth. FIG.
FIG. 4 shows a state in which the movable holding member 18 has moved forward, and the magnetic flux generated by the permanent magnet 6 is radiated from the lower surface 19 of the movable holding member 5 to cause the magnetic flux to act on the base 3 so that the movable holding member 18 is moved. The body 5 has the lower surface 19 on the base 3
And is fixed to the base 3.
In the present invention, this is called an ON state.

FIG. 4 shows a state in which the movable holding member 18 is retracted. The magnetic flux generated by the permanent magnet 6 exhibits a closed loop inside, and the magnetic flux does not act on the base 3. The adsorption state is released. In the present invention, this is called an off state.

FIG. 5 shows the structure of the switching means 7, in which the movable holder 18 is moved back and forth to switch between the on state shown in FIG. 3 and the off state shown in FIG. As shown in FIG. 1, a cylindrical operating shaft 20 extending in the width direction (lateral direction) of the movable holding body 5 and rotatable around its axis is provided at the rear end of the movable holding body 5. It is arranged. For example, a hexagonal hole 21 that can be engaged with a hexagon wrench is provided on one end surface of the operation shaft 20, and an intermediate portion of the operation shaft is cut off to form a small-diameter connection shaft 2.
2 are provided in an eccentric state. The movable holding member 18
At the rear end, protruding pieces 23, 23 are provided so as to face each other at an interval, and the protruding pieces 23, 23 and the connecting shaft 22 are connected by a connecting piece 25. Circular shaft holes 27 and 29 are provided at both end portions of the connecting piece 25, and one of the shaft holes 2 and 29 is provided.
The connection shaft 22 is inserted through 7. In the other shaft hole 29, a connecting pin 30 whose both ends are supported by the opposed protruding pieces 23, 23 is inserted.

When a hexagonal wrench is inserted into the hexagonal hole 21 and the operation shaft 20 is rotated counterclockwise in FIG. 4 (indicated by an arrow), the connecting piece 25 moves forward. As a result, the movable holder 18 is advanced. When the operation shaft 20 is rotated clockwise (indicated by an arrow) in FIG. 3 from this forward state, the movable holding member 18 is pulled by the connecting piece 25 and retreats.

As shown in FIGS. 1 and 6, the movable holding member 5 is provided at its front end with a pressing member 32 which can move forward so as to press the work 31 toward the fixed holding member 2. I have. The pressing tool 32 is, in the present embodiment,
As shown in FIGS. 6 to 8, the front surface 33 is formed as an inclined surface that is inclined downward toward the front, and has a vertical rear surface 34.
The fixing member 3 fixed to the front surface 35 of the main body 11
6 and a movable member 40 having a rear surface 37 formed as an inclined surface capable of contacting the inclined front surface 33 and a front surface 39 formed as a vertical surface. Then, the dovetail-shaped protrusion 42 projecting from the rear surface of the movable member 40 is fitted into the dovetail groove 41 provided on the front surface 33 of the fixed member 36, so that the dovetail-shaped protrusion 42 is formed. It can move diagonally along the dovetail groove 41. A half grooved screw groove 43 is provided at the center of the front surface of the fixing member 36. A central portion in the length direction is formed in the shaft portion 44 having a small diameter in the screw groove 43, and a hexagon wrench is formed at the upper end. Hexagonal hole 45 into which can be inserted
Is screwed into the rear half 47 of the operation screw shaft 46 provided with. In the center of the rear surface of the dovetail-shaped protrusion 42 of the movable member 40, a half groove 50 is provided to be fitted to the front half 49 of the operation screw shaft 46. In addition, a semicircular projection 51 is provided on the rear surface to fit into the small-diameter shaft portion 44 of the operation screw shaft. However, as the operation screw shaft 46 is rotated forward and backward, the operation screw shaft 46 can move up and down in an oblique direction indicated by an arrow in FIG. 6, and accordingly, the movable member 40 can move up and down obliquely. As a result, the front surface 39 of the movable member 40 is
One can move forward and backward.

However, in order to fix the work 31 with the fixed holding body 2 and the movable holding body 5 using the vice 1 having the above-described structure, first, the work 31 is adjusted to the size of the work 31 to be held.
The switching means 7 is turned off as shown in FIG. 4, and the movable holding body 5 is manually slid to an appropriate position on the base 3 so that the movable holding body 5 is moved between the fixed holding body 2 and the movable holding body 5. The state is such that the work 31 is sandwiched. In this state, when the operation of attracting the permanent magnet 6 is turned on as shown in FIG. 3, the movable holding body 5 is attracted to the upper surface 9 of the base 3 at the lower surface 19 and is fixed to the base 3. In this state, the work 31 is not held between the fixed holding body 2 and the movable holding body 5. Thereafter, when the operating screw shaft 46 of the pressing member 32 is rotated so as to be screwed downward and the movable member 40 is advanced, the front surface 3 of the movable member 40 is moved forward.
9 presses the work 31 toward the fixed holding body 2, and as a result, the work 31 is held between the fixed holding body 2 and the movable holding body 5.

In order to remove the work 31 from the vise 1 after the required machining of the work 31 is completed, the operating shaft 20 is rotated clockwise (in the direction of the arrow shown in FIG. 3) in the clamped state and the permanent The attracting operation of the magnet 6 is turned off as shown in FIG. Thereby, the suction state is released and the movable holding body 5 can be moved, so that the work 31 can be easily removed.

[Second Embodiment] FIGS. 9 to 10 show another embodiment of a vise 1 according to the present invention.
As described above, an iron base 3 provided with a fixed holding body 2
In addition, the movable holding member 5 can move forward and backward with respect to the fixed holding member 2.
In the same manner as described above (see FIGS. 3 to 5), a permanent magnet 6 is incorporated in the movable holding member 5 and a switching means 7 for switching the operation of attracting the permanent magnet 6 to the base 3 is provided. This is provided on the movable holding body 5.

As shown in FIG. 11, a trapezoidal concave groove 53 is formed on the lower surface of the movable holding member 5 so as to extend in the longitudinal direction of the base 3 so that the groove width of the inlet 52 is larger.
Are provided, and the inclined inner surface 5 facing the left and right of the concave groove 53.
Reference numerals 4 and 54 are formed as smooth inclined surfaces inclined inward.

On the upper part of the base 3, there are inclined outer surfaces 55, 5 which can make surface contact with the left and right inclined inner surfaces 54, 54.
5 are provided on the left and right, and a fitting protrusion 56 having a trapezoidal cross section to be fitted into the groove 53 is provided, and in a state where the surfaces are in contact with each other, the smooth upper surface 57 of the fitting protrusion 56 is 53
Is brought into a state of approaching the smooth bottom surface 59.

The switching means 7 transfers the magnetic flux generated by the permanent magnet 6 to the lower surface (bottom surface of the groove) 59 of the movable holding member 5.
The movable holding body 5 is attracted to the upper surface 57 by its lower surface 59 by applying a magnetic flux to the upper surface 57 of the fitting projection 56, whereby the movable holding body 5 is attached to the base 3. The fixed ON state and the permanent magnet 6
Is formed in a closed loop inside so that no magnetic flux acts on the upper surface 57, thereby switching the off state to release the attracted state.

In the on state, the permanent magnet 6
The wedge action is generated on the inclined inner side surfaces 54 and 54 by the force of the suction state of the base 3 (adsorption state with a small interval), and a reaction force exceeding the attraction force of the permanent magnet 6 is generated by the two inclined inner side surfaces. 54, 54, so that a large frictional force is generated between the inclined inner side surface 54 and the inclined outer side surface 55 located on the left and right.
The frictional force generated in this manner is larger than the frictional force generated by the attraction between the horizontal upper surface 9 of the base 3 and the horizontal lower surface 19 of the movable holding member 5 in the above embodiment.
Therefore, it is possible to improve the fixing strength of the movable holding body 5 to the base 3. In this case, the frictional force can be increased by configuring the inclined inner side surface 54 and the inclined outer side surface 55 in the contact state to be in the suction state.

At the front end of the movable holding member 5, a pressing member 32 similar to that in the first embodiment is provided.

However, in order to fix the work 31 with the fixed holding body 2 and the movable holding body 5 using the vice 1 having the above structure, first, as shown in FIG. At the same time, the switching means 7 is turned off, and the movable holding member 5 is manually slid to an appropriate position on the base 3 so that the movable holding member 5 is moved between the fixed holding member 2 and the movable holding member 5. The state is such that the work 31 is sandwiched. In this state, when the attracting operation of the permanent magnet 6 is turned on, the movable holding member 5 is moved by its lower surface 59 to the upper surface 57 of the base 3.
(Sucked state at a small interval) and is fixed to the base 3. In this state, the work 31 is not held between the fixed holding body 2 and the movable holding body 5. Thereafter, the movable screw 40 is advanced by rotating the operation screw shaft 46 of the pressing tool 32. As a result, the front surface 39 of the movable member 40 presses the work 31 toward the fixed holding body 2, and as a result, the work 31 is held between the fixed holding body 2 and the movable holding body 5 as required. Will be.

In order to remove the work 31 from the vise 1 after the required machining of the work is completed, the operating shaft 20 is rotated clockwise (in the direction of the arrow shown in FIG. 3) in the clamped state, and the permanent magnet is removed. The suction operation of No. 6 is turned off. Thereby, the suction state is released and the movable holding body 5 can be moved, so that the work can be easily removed.

[Third Embodiment] FIGS. 12 and 13 show another embodiment of a vise 1 according to the present invention. In the same manner as above, an iron base provided with a fixed holding member 2 is provided. 3 is provided with a movable holding member 5 which can be moved forward and backward with respect to the fixed holding member 2. In the same manner as described above (see FIGS. 3 to 5), the movable holding member 5 incorporates a permanent magnet 6 and A switching means 7 for switching the attracting operation of the magnet 6 to the base 3 is provided on the movable holding member 5.

As shown in FIG. 14, the upper surface 9 of the base 3 is provided with a trapezoidal concave groove 61 in which the groove width of the inlet 60 is formed so as to extend in the longitudinal direction thereof.
The left and right inclined inner side surfaces 62, 62 of the concave groove 61 are formed as smooth inclined surfaces inclined inward, and the movable holding body 5 is in contact with the left and right inclined inner side surfaces 62, 62. Slant outer surfaces 63, 63 that can be brought into contact with each other are provided on the left and right sides, and the fitting protrusion 6 having a trapezoidal cross section fit into the concave groove 61.
5 so that the smooth lower surface 66 of the fitting projection 65 is brought extremely close to the smooth bottom surface 67 of the groove 61 in the surface contact state.

The switching means 7 radiates the magnetic flux generated by the permanent magnet 6 on the lower surface (the lower surface of the fitting projection 65) 66 of the movable holding member 5, and causes the smooth bottom surface 67 of the concave groove 61 to radiate. By applying a magnetic flux, the movable holding member 5 is attracted to the bottom surface 67 at its lower surface 66, whereby the movable holding member 5 is fixed to the base 3 in the ON state, and the magnetic flux generated by the permanent magnet 6 is reduced. It is configured such that a magnetic flux does not act on the bottom surface 67 by forming a closed loop inside, thereby switching the off state to release the suction state.

In the on state, the permanent magnet 6
The wedge action is generated on the inclined inner side surfaces 62, 62 by the force of the suction state of the base 3 (attraction state with a small interval), and a reaction force exceeding the attraction force of the permanent magnet 6 is generated. 62, 62, so that a large frictional force is generated between the inclined inner side surface 62 and the inclined outer side surface 63 located on the left and right.
The frictional force generated in this manner is larger than the frictional force generated by the attraction between the horizontal upper surface 9 of the base 3 and the horizontal lower surface 19 of the movable holding member 5 in the above embodiment.
Therefore, it is possible to improve the fixing strength of the movable holding body 5 to the base 3. In this case, the inclined inner side surface 55 and the inclined outer side surface 56 in the contact state are configured to be in the suction state, so that the frictional force can be increased.

At the front end of the movable holding member 5, a pressing member 32 similar to that in the first embodiment is provided.

However, in order to fix the work 31 with the fixed holding body 2 and the movable holding body 5 using the vice 1 having the above-described structure, first, as shown in FIG. At the same time, the switching means 7 is turned off, and the movable holding member 5 is manually slid to an appropriate position on the base 3 so that the movable holding member 5 is moved between the fixed holding member 2 and the movable holding member 5. The state is such that the work 31 is sandwiched. When the attracting operation of the permanent magnet 6 is turned on in this state, the movable holding member 5 is attracted to the upper surface (bottom surface 67) of the base 3 at its lower surface 66 (attracted state with a small space therebetween), and It is fixed to 3. In this state, the work 3
1 is not held between the fixed holding body 2 and the movable holding body 5. Thereafter, the movable screw 40 is advanced by rotating the operation screw shaft 46 of the pressing tool 32. by this,
The front surface 39 of the movable member 40 presses the work 31 toward the fixed holding member 2, and as a result, the work 31 is held between the fixed holding member 2 and the movable holding member 5 as required. .

In order to remove the work 31 from the vise 1 after the required machining of the work is completed, the operating shaft 20 is rotated clockwise (in the direction of the arrow shown in FIG. 3) in the clamped state, and the permanent magnet is removed. The suction operation of No. 6 is turned off. Thereby, the suction state is released and the movable holding body 5 can be moved, so that the work can be easily removed.

[Other Embodiments] (1) A vise according to the present invention is capable of adsorbing and fixing a movable holding member to a base and releasing the adsorbing state by switching between the ON state and the OFF state. As long as the means for incorporating the permanent magnet into the movable holding body, and
The switching means for switching the operation of attracting the permanent magnet to the base can be configured in various ways.

(2) In order to reduce the weight of the base, only the upper part is made of iron and the other parts are made of a lightweight material such as aluminum so long as the above-mentioned ON state is obtained. There is also.

(3) The pressing member which can advance so as to press the work toward the fixed holding member may be constituted by using a hydraulic means, an air means or the like in addition to the means using the operation screw shaft.

(4) The vise according to the present invention is not limited to the horizontal type described in the above embodiment, but may be configured as a vertical type or an oblique type in which the movable holding member can move forward and backward in the vertical and oblique directions. It may be done.

[0039]

The present invention has the following excellent effects. (1) A vise according to the present invention comprises an iron base, a fixed holding member, and a movable holding member which can move forward and backward with respect to the fixed holding member. A permanent magnet is incorporated in the movable holding body, and the operation of attracting the permanent magnet to the base can be switched by switching means. Therefore, according to the present invention, the movable holding member can be freely slid on the base when the switching means is off, and the movable permanent magnet is attracted to the base by the built-in permanent magnet when the switching means is on. The holding body can be fixed to the base. Therefore, when the switching means is turned off, the movable holding body is moved to a position where the front end of the pressing tool contacts the work supported by the fixed holding body, and then the switching means is turned on. Can be fixed to the base.
By moving the pressing tool forward in this fixed state, the work can be reliably clamped between the fixed clamp and the movable clamp with a small amount of advance. Thus, according to the present invention, the conventional problem that the pressing tool must be advanced over a longer distance from the state where the movable holding body is fixed at the predetermined position can be solved. Further, according to the present invention, the work can be easily removed by turning off the switching means and making the movable holding member free after the machining of the work is completed.

(2) When the vise according to the present invention is configured as having a trapezoidal groove on the lower surface of the movable holding member or the upper surface of the base, when the switching means is in the on state, the vise of the permanent magnet with respect to the base is turned off. The wedge action is generated on the inclined inner side surfaces located on the left and right sides of the groove by the force of the suction state (the suction state with a small interval). As a result, a reaction force exceeding the attraction force of the permanent magnet can be made to act on the inclined inner surface, and the large frictional force generated by the reaction can make the movable clamping body more firmly attracted and fixed to the base. It will be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a vise according to the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a sectional view showing an ON state of a switching unit.

FIG. 4 is a cross-sectional view illustrating an off state of a switching unit.

FIG. 5 is a perspective view illustrating a switching unit.

FIG. 6 is a partial cross-sectional front view illustrating an operation of clamping a work between a fixed clamping member and a movable clamping member.

FIG. 7 is an exploded perspective view illustrating a pressing tool.

FIG. 8 is a perspective view showing a fixed member and a movable member constituting the pressing tool.

FIG. 9 is a perspective view showing another embodiment of the vice according to the present invention.

FIG. 10 is a partial view of the side surface.

FIG. 11 is a side view showing a lower portion of the movable holding body.

FIG. 12 is a perspective view showing another embodiment of the vice according to the present invention.

FIG. 13 is a partial view of the side surface.

FIG. 14 is a side view showing the upper portion of the base.

FIG. 15 is a perspective view illustrating a conventional vise.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vise 2 fixed holding body 3 base 5 movable holding body 6 permanent magnet 7 switching means 9 base upper surface 53 concave groove 54 inclined inner side surface 55 inclined outer side surface 56 fitting protrusion 57 upper surface of fitting protrusion 59 bottom surface of groove 61 concave groove 62 inclined inner side surface 63 inclined outer side surface 65 fitting protrusion 66 lower surface of fitting protrusion 67 bottom surface of groove

Claims (3)

[Claims] A movable holding member is provided on an iron base provided with a fixed holding member so as to be capable of moving forward and backward with respect to the fixed holding member. The movable holding member has a built-in permanent magnet and a permanent magnet. A switching means for switching an attracting operation with respect to the base; wherein the switching means radiates a magnetic flux generated by the permanent magnet on a lower surface of the movable holding body to cause the magnetic flux to act on the base; The holding body is attracted to the upper surface of the base with the lower surface thereof, whereby the movable holding body is fixed to the base in the ON state, and the magnetic flux generated by the permanent magnet is closed internally so that no magnetic flux acts on the base. Thus, the movable holding body in a state where the work is held between the fixed holding body and the movable holding body is configured so as to perform switching of an off state in which the suction state is released. The state, adapted to be sucked and secured on the base, and the movable clamping member is characterized by having a pusher capable of advancing the workpiece so as to press toward the fixed clamping member device. 2. A movable holding member is provided on a steel base provided with a fixed holding member so as to be able to move forward and backward with respect to the fixed holding member. The movable holding member has a built-in permanent magnet and a permanent magnet. A switching means for switching the suction operation to the base is provided. A trapezoidal recess formed on the lower surface of the movable holding body such that an inlet groove width is formed so as to extend in the longitudinal direction of the base. A groove is provided, and the left and right inclined inner side surfaces of the concave groove are formed as smooth inclined surfaces inclined inward, and the upper part of the base is in surface contact with the left and right inclined inner side surfaces. An inclined outer surface to be obtained is provided on the left and right sides, and a fitting protrusion having a trapezoidal cross section to be fitted into the groove is provided, and in a state where the surfaces are in contact with each other, a smooth upper surface of the fitting protrusion is formed by the groove. It is made to approach the smooth bottom surface, and The switching means radiates the magnetic flux generated by the permanent magnet on the lower surface of the movable holding member, and applies the magnetic flux to the smooth upper surface of the fitting projection to thereby fit the movable holding member on the lower surface thereof. The upper surface of the joint portion is attracted, whereby the movable holding body is fixed to the base in the ON state, and the magnetic flux generated by the permanent magnet is closed internally so that no magnetic flux acts on the upper surface of the fitting protrusion. The movable holding member, which holds the workpiece between the stationary holding member and the movable holding member, is configured to switch the OFF state to release the suction state. And a movable holding member having a pressing member which can move forward so as to press the work toward the fixed holding member. 3. A movable holding member is provided on a steel base provided with a fixed holding member so as to be able to advance and retreat with respect to the fixed holding member. The movable holding member has a built-in permanent magnet and a permanent magnet. A switching means for switching the suction operation with respect to the base is provided. A trapezoidal concave groove having a larger inlet groove width is provided on the upper surface of the base so as to extend in the longitudinal direction of the base. The concave inner surface is formed as a smooth inclined surface that inwardly slopes, and the movable holding body has an inclined outer surface that can make surface contact with the left and right inclined inner surfaces. Are provided on the left and right sides and have fitting protrusions having a trapezoidal cross section that are fitted into the grooves, and in a state where the surfaces are in contact with each other, the smooth lower surface of the fitting protrusions is on the smooth bottom surface of the grooves. It is made to be in an approaching state, and the switching means is By radiating the magnetic flux generated by the permanent magnet on the lower surface of the fitting projection and applying a magnetic flux to the smooth bottom surface of the groove, the movable holding body is attracted to the bottom surface of the groove by the lower surface. By this, the ON state in which the movable holding body is fixed to the base, and the OFF state in which the magnetic flux generated by the permanent magnet is made a closed loop inside and the magnetic flux does not act on the bottom surface of the concave groove, thereby releasing the attracted state. The movable holding member, which is configured to switch the state between the movable holding member and the fixed holding member, holds the work between the stationary holding member and the fixed holding member. A vise, wherein the movable holding body has a pressing tool which can advance so as to press the work toward the fixed holding body.