KR20050002886A - Spacer block of vice - Google Patents

Abstract

The present invention relates to a spacer block for use in maintaining a distance between adjacent workpieces when fixing a plurality of workpieces to a vise. It is possible to flexibly cope with individual workpiece dimension differences or warpage, and to fix a plurality of workpieces at respective unique positions. The spacer block of the present invention is provided with a slide table 1 guided in the gripping direction of the vise. A drive wedge 8 having a drive wedge surface 9 formed on both outer surfaces thereof is fitted to the guide protrusion installed on the slide table, and the retraction is made to advance and retreat the drive wedge in the standing direction of the guide protrusion. The apparatus 11 is installed. On both sides of this drive wedge, a pair of clasps 14 provided with a driven wedge surface 13 in sliding contact with the wedge surface is provided on the back surface. And a return spring which applies a force in the direction which approaches this pair of clasps is provided. It is preferable to make the drive wedge surface 9 and the driven wedge surface 13 into the multistage wedge surface which arrange | positioned several wedge surface in staircase shape.

Description

Spacer Block of Vise {SPACER BLOCK OF VICE}

When machining many same-shaped workpieces with machine tools other than a machining center, it is efficient to fix several workpieces to a table and to process simultaneously. In order to fix a plurality of workpieces on the table, a vise is fixed to the table, and one or several spacer blocks are arranged between the jaws facing the vise, and the spacer blocks and the jaws and the spacer blocks The method of inserting and fixing a workpiece between (when several spacer blocks are arranged) is widely used (for example, Japanese Patent Laid-Open Nos. 1995, 27756, 1999, 58248, and 1999, 300562). number).

When fixing a long elongate workpiece to a table, in order to prevent a workpiece | curve from bending by a processing repulsion force, several vise is arrange | positioned in the longitudinal direction of a workpiece | work, and several parts are fixed in the longitudinal direction of a workpiece | work. Therefore, when fixing a plurality of elongate workpiece | works, all the several vise which attached one or several spacer block between the opposing jaws is used.

When fixing long and thin workpieces at three or more locations in the longitudinal direction with three or more vises, the workpiece is bent due to the grip force of the vise if there is a misalignment in the position of the jaws of the vise or the position of the spacer block. In addition, shape and dimension errors exist in the individual workpieces. Therefore, when spacer blocks having the same dimensions are used for all the vises, the workpieces are fixed in a bent state by the shape error when the workpieces are fixed, and the bending is elastically returned when the workpieces are removed from the vise.

Fig. 6 exaggerates the shape error of the work 42, but when the three holes 44 are machined in a straight line in the work 42 having such a shape error, Therefore, when the dimensions of the spacer blocks 41a and 41b are determined, the bending of an error occurs in the individual workpieces 42 due to the fixing force of the vices 40a and 40b. When the hole 44 processed in a straight line in the state where the warpage has occurred, a positive error corresponding to the warpage of the workpiece during processing occurs in the positional relationship of the three holes when the workpiece 42 is removed from the vise.

In particular, when the workpiece is a drawing material or an address material, since the bending and the dimension error in the workpiece length direction are large, it is almost impossible to simultaneously process a plurality of workpieces in this manner. In addition, it is also practically impossible to prepare the spacer blocks 41a and 41b having dimensions corresponding to the individual workpiece shape errors to be processed. Therefore, when machining such a workpiece | work, the workpiece is fixed and processed one by one.

However, the processing of an elongate workpiece requires a large table for fixing the workpiece, and thus the machine tool used becomes large. In the method of fixing the workpieces one by one on the table, the time required for attaching and detaching the workpieces becomes longer than the actual machining time of the workpieces, and the operation rate of the machine tool decreases. That is, a large machine is used at low operation rate, and processing cost rises. In addition, since the work needs to be attached and detached frequently, the workload is large and the operator cannot perform other work during machining.

TECHNICAL FIELD This invention relates to the spacer block used for maintaining the space | interval of adjacent workpiece | work mutually when fixing several workpiece | work to the vice (work vice) fixed to the table of a machine tool.

This invention makes it a subject to solve the above-mentioned problem, and by installing it in a vice and using it, it responds flexibly to the dimension difference of each workpiece | work, the presence or absence of bending, and the shape error and dimension error of an individual workpiece | work. In order to provide a spacer block having a simple structure and excellent operability, a plurality of workpieces can be fixed at each unique position.

The spacer block of the present invention includes a slide portion 2 guided in one direction, a guide surface 5 parallel to the slide direction in the slide portion, and a guide protrusion 4 installed at right angles to the guide surface. The slide stage 1 provided is provided. In the guide protrusion of this slide stand, the drive wedge 8 which provided the lower drive wedge surface 9 on both outer surfaces which fit the said guide protrusion is fitted so that a sliding movement is possible, and this drive wedge is a said guide protrusion. And a retraction device (11, 55, 10) for moving forward and backward in the installed direction. On both sides of this drive wedge, a pair of clasps 14 having a drive wedge surface 13 slidingly in contact with the drive wedge surface are provided on the back side, and the lower sides of these clasps are guide surfaces of the slide table. Guided by (5). And a return spring 18 which applies a force in the direction which approaches this pair of clasps is provided.

In the spacer block of the above structure, in order to stabilize the fixation of the work and to stabilize the sliding motion between the drive wedge surface 9 and the driven wedge surface 13 of the clasp, the drive wedge surface 9 and It is preferable to make the driven wedge surface 13 into the multistage wedge surface which arrange | positioned several wedge surface in staircase shape.

A rubber-like elastic body 20 is slightly projected to the lower side of the clasp 14 in sliding contact with the guide surface 5 of the slide table, and the lower side of the clasp 14 is guided by the elastic body. When the workpiece is fixed, the elastic body 20 is pressed and crushed by the thrust of the driving wedge 8 when the workpiece is fixed, and the clasp 14 is slightly lowered. The workpiece held in the contact can be pressed against the upper surface of the base of the vise.

In the clasp 14, the support board 30 which defines the lower surface of a workpiece | work at the position immediately adjacent to the clasp can be provided. When attaching the support plate 30, the plate screw 31 is screwed in a state where the conical surface P of the lower surface of the head is exposed to the screw hole 26 provided in the workpiece holding surface of the clasp 14, The support plate 30 is provided with a through hole 33 for inserting the head of the countersunk screw, and the ball plunger 34 having the tip contacted to the conical surface P of the countersunk screw on the lower circumferential surface of the through hole. Install. The support plate 30 is pressed against the workpiece holding surface 16 of the clasp and the guide surface 5 of the slide table by the pressing force of the ball plunger 34, and can prevent the work from floating and being fixed.

The advancing direction of the clasp 14 at the time of advancing / removing the drive wedge 8 is the same direction as the slide direction of the slide stand 1. By using the guide protrusion 4 as a cylindrical guide, the advancing direction of the clasp 14 can be shifted to one side according to the work shape. As for the return spring 18, it is preferable to use a spring wound with a small number of windings, and in particular, when Ω-type and C-U-type springs having one winding number or less are disposed on both sides of the clasp 14, By this return spring 18, the shift | offset | difference to the horizontal direction of the clasp 14 can be regulated.

In order to avoid entry of cutting powder into the wedge surface or guide surface of the clasp 14, it is preferable to provide a cover. As the structure of this cover, a thin c-shaped cover plate extending to the rear of both clasps is provided. The structure in which 21 is fixed to both clasps 14 so that the back part may overlap is simple.

The spacer block having the above structure allows the slide table 1 to move freely in the workpiece holding direction of the vise, and is mounted between the braces of the vise. As shown in Fig. 6, the spacer block 41b of the present invention mounts a plurality of elongated workpieces 42 to an intermediate portion 40b of three or more vises 40 side by side in the longitudinal direction thereof. Especially valid. In this case, the spacer block 41a of the vise 40a at both ends may be a block of fixed dimensions in accordance with the work dimension. As the vise 40b of the intermediate portion, it is preferable to use a vise whose jaws 43b are both movable clasps at the same time. Otherwise, after fixing the workpiece 42 to the vise 40 in the following order, the middle part vise 40b is fixed to the table.

The plurality of workpieces 42 to be fixed are first gripped and fixed between the jaw 43a of the vise 40a at both ends and the spacer block 41a and between the spacer block 41a. Next, the drive wedge 8 of the spacer block 41b of the intermediate vise 40b is advanced, and the clasps 14 on both sides are brought into contact with the adjacent workpieces 42. When one of the clasps contacts the work first, the slide table 1 moves on the base 3 of the vise until the other clasp contacts the adjacent work. In this way, when the clasps of all the spacer blocks 41b are brought into contact with the work 42, the jaws 43b on both sides of the intermediate vise 40b are made to advance and the work 42 inserted therebetween is collectively collected. Gripping While the work holding force of the vise acts on the clasp 14 of each spacer block, the clasp 14 does not retreat by the self-locking action of the wedge surfaces 9 and 13.

According to the structure in which the clasp 14 is in sliding contact with the guide surface 5 of the slide table via the elastic body 20, the clasp 14 acts on the clasp from the work when the clasp 14 contacts the work 42. By the repulsive force and the advancing action of the drive wedge 8, the elastic body 20 is pressed and crushed, and the clasp 14 tries to move toward the guide surface 5 side. By this force, the workpiece 42 is gripped in a state of being in close contact with the base 3 of the vise. In the structure in which the work support plate 30 is provided, the work supported by the upper edge of the work support plate is in a state of being in close contact with the work support plate 30 by a force to move downward of the clasp 14. Are gripped by. The work support plate 30 is used when holding a workpiece having a small depth dimension.

In addition, by forming the wedge surfaces 9 and 13 in a step shape in multiple stages, the spacer block is downsized, and it is also effective for stabilizing the forward / rearward operation of the clasp 14.

[Brief Description of Drawings]

1 is a cross-sectional side view showing a spacer block of a first embodiment of the present invention.

FIG. 2 is a front view of the spacer block of FIG. 1. FIG.

3 is a perspective view of the spacer block of FIG. 1.

4 is a partial cross-sectional side view showing the attachment structure of the work rest.

FIG. 5 is a front view of the clasp to which the work support plate shown in FIG. 4 is mounted. FIG.

6 is a plan view schematically showing a state where a plurality of elongated workpieces are fixed by exaggerating the shape error of the workpieces.

Fig. 7 is an exploded perspective view of the slide table of the spacer block of the second embodiment of the present invention.

Fig. 8 is a sectional view in the same direction as Fig. 1 of the spacer block of the second embodiment.

9 is a plan view of the spacer block of FIG. 8.

FIG. 10 is a cross-sectional view of the spacer block of FIG. 8 in a direction orthogonal to FIG. 8.

In the drawings, reference numeral 1 denotes a slide stage, 2 a slide portion, 3 a base stage, 4 a guide protrusion installed on a slide stage, 5 a guide surface of a slide stage, 8 a driving wedge, 9 a driving wedge surface, 10 is a coil spring for returning the driving wedge, 11 is a hexagon socket head bolt or a male screw, 12 is an insertion hole, 13 is a driven driving surface, 14 is a clasp, 15 is a guide groove, 16 is a work gripping surface of the clasp, 17 is a retaining pin, 18 is a return spring for returning the clasp, 19 is a thin groove on the lower side of the clasp, 20 is an elastic body fitted into this thin groove, 30 a work support plate installed on the clasp, 31 is a plate screw, P is the cone of the plate screw, 34 is the ball plunger, 55 is the piston for driving the drive wedge, 60 is the fluid pressure chamber of the piston, and L is the clearance gap.

1 to 3 show one embodiment of the spacer block of the present invention. The slide table 1 is provided with the slide part 2 which made the lower side C-shaped cross section on the lower surface, and this slide part 2 slides freely in the base stand of the vise which provided the guide groove in the side surface. do. The slide stage 1 has a thick plate-like guide protrusion 4 in a direction perpendicular to the slide direction at the center of the upper surface, and the upper surface of the slide base on both sides of the base of the guide protrusion is a slide of the slide portion 2. It is the guide surface 5 parallel to a direction. The screw hole 6 is formed in the center of the upper surface of the guide protrusion 4.

The driving wedge 8 has a plurality of wedge surfaces 9 at the bottom thereof formed in a step shape on opposite outer surfaces thereof, and a guide groove 15 for fitting the guide protrusion 4 is formed at the lower center. have. The insertion hole 12 of the hexagonal socket head bolt 11 is formed in the center of the upper surface of the drive wedge 8. The hexagonal socket head bolt 11 inserted into the insertion hole is screwed into the screw hole 6 of the slide table. When the hexagon socket head bolt 11 is rotated to the right, the driving wedge 8 is moved. Press down to move. The coil spring 10 moving upward by pushing the driving wedge 8 is installed between the bottom surface of the guide groove 15 and the upper surface of the guide protrusion 4 in a state of being penetrated through the hexagonal socket head bolt. have. Therefore, by rotating the hexagonal socket head bolt 11 to the left and right, the driving wedge 8 moves up and down along the guide surface of the guide protrusion 4.

On both sides of the drive wedge 8, the driven wedge surface 13 formed on the back surface is brought into contact with the drive wedge surface 9, and a pair of clasps 14 are mounted. The stop springs 17 are provided in the center of both sides of this clasp, and the return spring 18 which carried out the C shape in the state which stopped both ends to the stop pins 17 of both clasps is provided. It is installed. The width dimension of the clasp 14 is equal to the width dimension of the drive wedge 8, and the return spring 18 attached to the both sides of the clasp 14 contacts both sides of the drive wedge 8, The positional relationship of the width direction between 14 and the drive wedge 8 is maintained.

On the lower surface of the clasp 14, a thin groove 19 in the width direction is formed, and a string rubbery elastic body 20 having a circular cross section is inserted into the narrow groove. This elastic body 20 slightly protrudes from the thin groove 19 and is in sliding contact with the guide surface 5. Therefore, in the state which does not hold | maintain a workpiece, the small clearance gap L exists between the lower surface of the clasp 14 and the guide surface 5.

The cover 21 shown as an imaginary line in the figure is a c-shaped bent stainless steel plate with a thickness of 0.1 to 0.2 mm, and the two sides of the cover 21 are small screws (not shown), the upper edge of each side clasp 14. It is fixed to the The two back plates 21 fixed to both clasps are in an overlapping state. When the clasp 14 advances and retreats, two cover plates slide mutually in this overlapping part.

In this embodiment, when the hexagonal socket head bolt 11 is rotated to the right, the driving wedge 8 is lowered (moved to the slide side), and both clasps 14 on both sides are extended outwards. The size of the slide direction between the clasps becomes large. When the hexagonal socket head bolt 11 is rotated to the left, the driving wedge 8 is raised by the pressing force of the coil spring 10, and the clamps 14 on both sides are moved inward by the pressing force of the return spring 18. Thus, the size of the slide direction between both clasps becomes small.

As shown in Fig. 6, when fixing several elongated workpieces 42 with three or more vises 40a and 40b, the spacer block 41b is mounted as a spacer block 41b to be mounted on the intermediate vise 40b. Use After fixing the plurality of workpieces 42 with the vises 40a and 40b at both ends, the vise 40b in the middle portion is tightened lightly so as not to bend the workpiece, and then the hexagonal socket head cap bolts of the spacer blocks 41b ( 11) is rotated to the right to bring the two clasps 14 into contact with the work 42. When one of the clasps 14 contacts the workpiece 42 first, the slide portion 2 slides so that the slide table 1 moves, and the clasp on the opposite side is brought into contact with the workpiece 42 thereon. That is, the position of the spacer block 41b and the dimensions of the workpiece holding direction are automatically adjusted in combination with the workpiece.

After auto-adjusting all the spacer blocks 41b of the vise 40b of the intermediate part as described above, if the vise 40b of the intermediate part is firmly fastened, the plurality of workpieces 42 are warped due to the grip force of the vise. Without work, it is fixed by three or more vices 40a and 40b. Therefore, when the workpiece 42 is processed in this state, even if the workpiece 42 is removed from the vise, no abnormality occurs in the straightness of the machining surface, the machining position of the hole, or the like.

7 to 10 show a second embodiment of the present invention. In this second embodiment, the drive wedge 8 is driven by fluid pressure (hydraulic or pneumatic), and the slide table 1 is formed of two members of the fixing member 1a and the slide member 1b. It differs from the first embodiment in three respects, that is, the guide surface of the guide protrusion 4 is in a direction parallel to the sliding direction of the clasp 14. This difference will be described below.

The slide table 1 is formed of a fixing member 1a fixed to a vise with a bolt and a slide member 1b that is inserted into the fixing member in a slide direction of the clasp 14 freely (see FIG. 7). ). The fixing member 1a is provided with four spot facing holes 50 for penetrating the fixing bolt in a rectangular plate shape. A guide hole 51 is formed in the center of the fixing member 1a. The guide hole is a rectangle whose upper half is long in the slide direction, and the lower half is circular with the same diameter as the long side of this rectangle. The slide member 1b forms the guide protrusion 4 by scraping the upper part of the cylinder in which the screw hole 6 was formed in the axial center from both sides. The width W of the square portion of the guide hole 51 is equal to the width W of the guide protrusion, and the guide protrusion 4 is inserted into the guide hole 51 with the width direction position defined. The rectangular long side dimension of the guide hole 51 is longer than the size of the corresponding portion of the guide protrusion 4, and the guide protrusion 4 protrudes on the fixing member 1a so as to be movable by the size difference. . That is, the part of the rectangular cross section of the guide hole 51 becomes the slide part 2. The flange portion 53 of the slide member is accommodated in the original portion of the guide hole 51 with the clearance gap of the above-mentioned dimension difference in the radial direction. The upper surface of the fixing member 1a becomes the guide surface 5 of the clasp 14.

In the lower part of the drive wedge 8, the guide groove 15 parallel to the slide direction of the clasp 14 is formed, and this guide groove is fitted in the upper part of the guide protrusion 4. As shown in FIG. In the upper part of the drive wedge 8, the cylinder hole 54 of an elongate elliptical cross section is formed in the direction orthogonal to a slide direction, and the elliptical piston 55 is fitted in this cylinder hole. A male screw 11 is provided at the tip of the piston rod 56 extending downward from the piston 55 so that the slide member is screwed into the screw hole 6. The lid 57 is attached to the upper end of the cylinder hole 54, and is fastened to the drive wedge 58 by the C clamp 58. Between the piston 55 and the lid 57, the coil spring 10 which presses and moves the drive wedge 8 upward is provided. At the bottom of the cylinder hole 54, a dish-shaped recess 60 for forming a fluid pressure chamber is provided. Nipple holes 61 are formed on both side surfaces of the drive wedge 8, and the inner end of the nipple hole communicates with the dish-shaped recess 60 serving as the fluid chamber. The nipple hole 61 is connected to a flexible pipe for supplying air pressure. Since two nipple holes 61 are provided, the nipple holes of the plurality of spacer blocks are sequentially connected to each other by a flexible pipe, so that one pneumatic pipe can simultaneously supply air pressure to a plurality of spacer blocks. 62 and 63 are sealing of a piston and a piston rod.

When the air pressure is supplied to the nipple hole 61, the air pressure tries to raise the piston 55. However, since the piston 55 cannot rise, the driving wedge 8 descends to open the clasps 14 on both sides. Press outward to exercise. In addition, when the nipple hole 61 is opened to the atmosphere, the coil spring 10 raises the driving wedge 8, and the return spring 18 which applies a force in the direction in which both clasps 14 approach each other. This clasp 14 is moved inward.

A method of using the spacer block of the second embodiment described above will be described with reference to FIG. A plurality of vises 40a and 40b are fixed to the table of the machine tool in accordance with the grip position of the work 42, and the necessary number of spacer blocks 41a and 43b between the jaws 43a and 43b of both ends of these visees are provided. 41b). The spacer block 41a of the vise 40a of both ends is a block with a constant dimension conventionally used, and defines the space | interval of the some workpiece | work 42 which these blocks 41a hold | grip. The spacer block 41b of the intermediate vise 40b is a block of the second embodiment, and a plurality of these blocks are sequentially connected to each other by a flexible pipe having nipples at both ends thereof, so as to be opposite to the first spacer block. The nipple hole 61 is connected to a source of air provided with a conversion valve by a flexible pipe. In addition, the nipple hole 61 on the opposite side of the last spacer block covers the closed lid.

The workpiece | work 42 is set in the state which does not supply working air to the spacer block 41b, and the both ends are fixed with the vise 40a of both sides. Next, operating air is supplied to the spacer block 41b. By this pneumatic pressure, the clasp 14 of each spacer block opens and stops in contact with the workpiece | work 42. The press contact force of the workpiece at this time can be set to the pressure of the air to be supplied. At this time, when one clasp of each spacer block 41b first contacts the work, the slide member 1b of the slide table slides on the fixing member 1a and moves to the opposite side, so that the clasps 14 on both sides are moved. Stops in contact with the workpiece 42 at the same time. Thus, after the spacer block 41b is in the state which defined the space | interval of the several workpiece | work 42 ..., mutually, the group 43b of the intermediate vise 40b is fastened, and the several workpiece | work 42 ... Securely fix the This strong fixing force of the jaw 43b at this time attempts to return the clasp 14 of the spacer block 41b. However, due to the self-holding action of the wedge surface 9, the clasp 14 is fastening force of the vise. The gap between the workpieces 42 and 42 is maintained. In this state, the workpieces are processed, and when the processing is completed, the intermediate vise 40b is opened, the working pressure of the spacer block 41b is opened, and both vises 40a are opened to open the workpiece 42... Take off.

On the front surface of the clasp 14 of the spacer block, a screw hole for attaching a projection or a work support plate can be formed. The clasp shown in FIG. 4 is provided with the screw hole 25 for fixing the processus | protrusion and the processus | protrusion which formed the unevenness | corrugation in the gripping surface, and the screw hole 26 for mounting the workpiece support plate 30, according to the workpiece | work to hold. have. When attaching the workpiece support plate 30, the screw hole 26 has a screw (screw plate) 31 whose lower surface is a conical surface P, and the conical surface P is the front surface of the clasp 14. Screw in the state protruding from. The work receiving plate 30 is provided with a through hole 33 through which the head 32 of the countersunk screw penetrates, and a ball plunger 34 which protrudes a tip of the penetrating hole downward.

When the plate screw 31 is screwed into the clasp 14 and the head 32 is inserted into the through hole 33, the work support plate 30 is pressed against the clasp 14, The work support plate 30 is mounted in a state where the ball of the plunger 34 contacts the conical surface P beyond the portion of the maximum diameter of the countersunk head. In this mounting state, the work support plate 30 is a subordinate force of the ball plunger 34, and the lower side is in contact with the guide surface 5 of the slide table, and the rear surface thereof is inclined by the inclination of the cone surface P. It is in the state pressed against the workpiece holding surface 16 of.

As shown by the virtual line in FIG. 4, the workpiece with a small depth dimension is gripped with the holding | gripping end supported by the upper edge of the workpiece support board 30. FIG. As described in the term of action, the work support plate 30 is in sliding contact with the guide surface 5 of the slide table, and the clasp 14 is slightly lifted from the guide surface by the elastic body 20. It is in sliding contact with. When the clasp 14 grasps a workpiece | work, the clasp 14 is pressed down by a gripping repulsion force, and a workpiece | gripping is gripped in the state by which the workpiece was pressed against the workpiece support plate 30.

By using the spacer block of this invention demonstrated above, the operation | work which fixes several workpiece | work to an accurate position can be simplified. In particular, when a plurality of thin long workpieces are fixed to a table of a machine tool with a plurality of vises, simultaneous fixing of a plurality of workpieces can be performed without deforming the workpieces, and it is easy to simultaneously process several of these kinds of workpieces. In addition, there is an effect that the effort and processing costs required for processing can be greatly reduced.

Claims (6)

A slide table (1) having a slide portion (2) guided in one direction, a guide surface (5) parallel to the slide direction in the slide portion, and a guide protrusion (4) installed at right angles to the guide surface; A driving wedge 8 formed downward on both outer surfaces to which the guide protrusion is fitted, the driving wedge 8 inserted into the guide protrusion, and a retraction device 11 for advancing and retracting the driving wedge in the guide direction of the guide protrusion. And a pair of clasps (14) having a driven wedge surface (13) slidingly contacting the drive wedge surface on the rear surface thereof, the lower side of which is guided to the guide surface; A spacer block of a vise having a return spring (18) forcing the clasps in a direction approaching each other. 2. The spacer block of the vise according to claim 1, wherein the drive wedge surface (9) and the driven wedge surface (13) are multistage wedge surfaces in which a plurality of wedge surfaces are arranged in a step shape. 2. The clasp 14 is in sliding contact with the guide surface 5 via a rubbery elastic body 20, wherein the elastic body slightly spaces the clasp 14 from the guide surface 5. Spacer block of the vise, characterized in that. 2. The screw hole 26 formed in the workpiece holding surface of the clasp 14, the countersunk screw 31 screwed into this screw hole by exposing the conical surface P of the lower surface of the head, And a ball plunger 34 in which the front end is brought into contact with the conical surface of the toothed screw, and is pressed against the workpiece holding surface 16 of the clasp and the guide surface 5 of the slide table by the pressing force of the ball plunger. A spacer block of the vise provided with the work support plate 30. 2. The spacer block of the vise according to claim 1, wherein said return spring is a planar wound spring of Ω type, C type or U type arranged on both sides of the clasp (14). The thin board-shaped U-shaped cover plate 21 extending to the rear of both clasps 14 is fixed to both clasps 14 so that the rear part thereof overlaps. Vise spacer block.