KR102200040B1 - Pneumatic vise equipped with double jaw - Google Patents

Abstract

The present invention relates to a pneumatic vise having a double jaw that can easily and safely fix various types of workpieces using pneumatic pressure, a barrel portion having a protruding hole on one side, a first pneumatic inlet connected to one end of the barrel portion, and the barrel A cylinder body having a second pneumatic inlet connected to the other end of the negative; An operation plate that is fitted to the barrel and moves forward and backward by pneumatic supply from each pneumatic inlet, a shaft coupled to one surface of the operation plate to protrude into the protruding hole, and two operation units coupled to one end of the shaft and arranged radially And a piston including a head having pressure protrusions protruding from both side surfaces of each operation unit; Consisting of two pressing jaws symmetrically arranged to correspond to the two operating units based on the protruding hole, each pressing jaw has a sliding groove in which each pressing protrusion is slidably coupled by being formed to be inclined in an up-and-down diagonal direction, It relates to a pneumatic vise having a double jaw including; a chucking unit capable of fixing a workpiece positioned between the pressure jaws by simultaneously moving the pressure jaws forward and backward according to the forward and backward movement of the piston.

Description

Pneumatic vise with double jaws{PNEUMATIC VISE EQUIPPED WITH DOUBLE JAW}

The present invention relates to a pneumatic vise having a double jaw that can easily and safely fix various types of workpieces using pneumatic pressure, a barrel portion having a protruding hole on one side, a first pneumatic inlet connected to one end of the barrel portion, and the barrel A cylinder body having a second pneumatic inlet connected to the other end of the negative; An operation plate that is fitted to the barrel and moves forward and backward by pneumatic supply from each pneumatic inlet, a shaft coupled to one surface of the operation plate to protrude into the protruding hole, and two operation units coupled to one end of the shaft and arranged radially And a piston including a head having pressure protrusions protruding from both sides of each operation unit; Consisting of two pressing jaws symmetrically arranged to correspond to the two operating units based on the protruding hole, each pressing jaw has a sliding groove in which each pressing protrusion is slidably coupled by being formed to be inclined in an up-and-down diagonal direction, It relates to a pneumatic vise having a double jaw including; a chucking unit capable of fixing a workpiece positioned between the pressure jaws by simultaneously moving the pressure jaws forward and backward according to the forward and backward movement of the piston.

In general, a vise refers to a device that engages and fixes a workpiece between jaws or chuck of a vise so that the workpiece does not move in position when processing a workpiece.

These vises are widely used in various industrial fields such as milling machines, machine tools such as CNC lathes, other machine facilities, and industrial processing tables.

As can be seen in Patent Publication No. 10-2017-0142033, Patent Publication No. 10-2000-0019631, Utility Model Publication No. 20-2017-0004002, Utility Model Registration No. 20-0477867, etc.,

Conventional vises are mostly composed of a fixing table and a pressurizing bar whose spacing between the fixing bar is adjusted, and the pressurizing bar is screwed to the screw bar of the handle for forward and backward movement of the pressurizing bar. It is a mechanical vise that moves in the direction of the fixing table and holds the workpiece between the process table and the pressurization table.

Conventional vise has the advantage of being easy to use and less fear of failure due to its simplified structure.

It is difficult to automate the facility where the vise is installed due to the manual operation structure, and the overall volume of the vise is very large, and there is a risk of the workpiece being bitten during work due to the mechanical pressure structure, and the form or structure of the available workpiece It is limited, and there is a problem such as incurring an additional cost for manufacturing a separate jig.

Accordingly, the present invention was devised to solve the above problems,

The pressure jaws that bite and fix the workpiece are operated simultaneously in a pneumatic type, so it is convenient to use and can keep the workpiece fixed safely.It is advantageous for miniaturization and automation of the vise, as well as pressurization jaws suitable for the shape and structure of various workpieces. It is an object to provide a pneumatic vise with a double jaw that can be customized and used at low cost.

In order to achieve the above object, the pneumatic vise having a double jaw according to the present invention,

A cylinder body having a barrel part having one side protruding hole, a first pneumatic inlet connected to one end of the barrel part, and a second pneumatic inlet connected to the other end of the barrel part;

An operation plate that is fitted to the barrel and moves forward and backward by pneumatic supply from each pneumatic inlet, a shaft that is coupled to one surface of the operation plate and protrudes into the protrusion hole, and two operation units coupled to one end of the shaft and arranged symmetrically to each other And a piston including a head having pressure protrusions protruding from both sides of each operation unit;

Consisting of two pressing jaws symmetrically arranged to correspond to the two operating units based on the protruding hole, each pressing jaw has a sliding groove in which each pressing protrusion is slidably coupled by being formed to be inclined in an up-and-down diagonal direction, And a chucking unit capable of fixing a workpiece positioned between the pressing jaws by simultaneously moving the pressing jaws forward and backward according to the forward and backward movement of the piston.

And in the pneumatic vise with double jaws according to the present invention,

The pressing protrusion is characterized in that the rectangular protrusion is formed to be inclined at the same angle as the sliding groove.

Also in the pneumatic vise with double jaws according to the present invention,

The pressure jaw is fitted to the cylinder body and slidably coupled to a first block having the sliding groove,

It is characterized in that the second block is coupled to one surface of the first block and is exposed to the outside of the cylinder body, and has a fitting portion for gripping the work piece at an inner end thereof.

Furthermore, in the pneumatic vise with a double jaw according to the present invention,

The cylinder body is formed in a straight line so that the guide groove to which the first block is slidably coupled passes through the protruding hole,

One end of the guide groove is provided with a locking end bent inwardly connected,

The first block has wing portions protruding from both sides of the other end, and the wing portion is fitted into the guide groove while being caught by the locking end.

The pneumatic vise with double jaws according to the present invention,

It is an automatic operation method using pneumatic pressure instead of the conventional manual mechanical operation method, which makes it easy and fast to fix the workpiece, and secures the pressing force between the pressurizing jaws uniformly and safely to facilitate various processing operations.

Since the pressure jaws work in conjunction with each other, it is possible to improve the accuracy of machining by preventing the position of the workpiece from shifting during the fixing work of the workpiece.

The two-stage block structure of the pressure jaw allows only the block equipped with the fitting part to be replaced, so it can be used to fix various workpieces at low cost without the need for additional custom manufacturing of a jig that fits the structure of the workpiece.

It is effective to reduce the risk of damage and failure of the workpiece by stably guiding and protecting the back and forth of the pressure jaws without interfering with the appearance of the piston.

1 is a perspective view of a pneumatic vise according to the present invention.
Figure 2 is an exploded perspective view of a pneumatic vise according to the present invention.
3 is a cross-sectional view of a pneumatic vise according to the present invention.
Figure 4 is a view for explaining the interlocking means according to the present invention.

The present invention will be described in detail in the text of the bar, implementation (態樣, aspect) (or embodiment) that can apply various changes and can have various forms. However, this is not intended to limit the present invention to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the present invention are included.

In each drawing, the same reference numerals, in particular the number of tens and ones, or the same number of tens, ones, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings The member indicated by the reference number can be identified as a member conforming to these criteria.

In addition, the components in each drawing are expressed by exaggeratingly large (or thick) or small (or thin) or simplified the size or thickness in consideration of the convenience of understanding, but this limits the scope of protection of the present invention. It shouldn't be.

The terms used in the present specification are only used to describe specific embodiments (sun, 態樣, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as ~include~ or ~consist are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being added.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

The ~1~, ~2~, etc. described in the present specification will only be referred to to distinguish different constituent elements, and are not limited to the order of manufacture, and the names in the detailed description and claims of the invention It may not match.

In describing the pneumatic vise having a double jaw according to the present invention, for convenience, if an approximate rough direction standard is specified with reference to FIG. 1, the direction in which the gravity acts as the lower side, and the vertical, left and right directions are determined as the visible direction. In the detailed description of the invention and in the claims related to other drawings, unless otherwise specified, directions are specified and described in accordance with this standard.

Hereinafter, a pneumatic vise having a double jaw according to the present invention will be described with reference to the accompanying drawings.

As shown in Figures 1 to 3, the pneumatic vise with a double jaw according to the present invention,

A cylinder body 10 fixedly installed on various machine tools or tables, a piston 20 protruding from the body 10 by moving forward and backward through pneumatic pressure in the cylinder body 10, and a push-pull operation of the piston 20 It includes a chucking unit 30 composed of two pressing jaws 31 that move back and forth at the same time to fix the work (not shown).

The cylinder body 10 has one side (the upper side of the drawing, the one side and the other side are described by mixing the upper side and the other side, respectively, based on the drawing below.) A barrel part 11 having a protruding hole 11a, and the barrel part ( A first pneumatic inlet 12 connected to one end of 11), and a second pneumatic inlet 13 connected to the other end of the barrel part 11.

The barrel part 11 has a cylindrical structure, the protruding hole 11a is in communication at the top, and the other side (upper and lower sides in the drawing) is formed to be opened,

The bottom plate 15 is coupled to the other opening of the barrel 11 to close the barrel 11.

The first pneumatic inlet 12 and the second pneumatic inlet 13 are connected to the outlet side of the first flow path 12a and the second flow path 13a formed through the cylinder body 10, and each flow path ( The inlet side of 12a) (13a) is provided with nibbles (12b) (13b) capable of connecting pneumatic hoses.

At this time, the first and second nibbles 12b and 13b are located at the same height, and the first and second flow paths 12a and 13a are vertically perpendicular to the inner passages of the nibbles 12b and 13b. Are respectively connected, and each pneumatic inlet 12, 13 is provided to be located opposite to each other in each flow path 12a, 13a.

As described above, the first pneumatic inlet 12 and the second pneumatic inlet 13 are located in opposite directions with respect to the operation plate 21 to be described later, and when pneumatic pressure is supplied to the first pneumatic inlet 12, the operation plate When (21) moves backward (up and down in the drawing) to the other side, and when pneumatic pressure is supplied to the second pneumatic inlet 13 on the other side, the operating plate 21 moves forward (up and down in the drawing) to one side.

In addition, any one of the first flow path 12a and the second flow path 13a is provided with an auxiliary pneumatic port 14 opened in communication with the outer surface of the cylinder body 10, and is fastened to the auxiliary pneumatic port 14. The pneumatic pressure remaining in the barrel part 11 is discharged to the auxiliary pneumatic port 14 through the tanning bolt, so that it can be eliminated.

And the cylinder body 10 is so that the guide groove 16 in which each pressing jaw 31 (more precisely, the first block 32) is simultaneously slidingly coupled to both sides in the longitudinal direction passes through the protruding hole 11a. It is formed in a straight line.

The guide groove 16 is formed by passing through the wall portions 16a protruding from both sides of the upper surface of the cylinder body 10 in a straight line in the radial direction around the protruding hole 11a, and the wall portion of the guide groove 16 ( 16a) At one end (upper end), a locking end 16b bent inward is provided to prevent separation of the pressing jaw 31 (more precisely, the first block 32).

Subsequently, the piston 20 is fitted to the barrel part 11 and is coupled to one surface of the operation plate 21 and the operation plate 21 to move forward and backward by pneumatic supply from the respective pneumatic inlets 12 and 13. The shaft 22 protruding into the protruding hole 11a, two operation parts 24 coupled to one end of the shaft 22 and arranged radially, and a pressing protrusion protruding from both sides of each operation part 24 ( And a head 23 with 24a).

The operation plate 21 has an outer diameter corresponding to the inner diameter of the barrel 11, and is coupled to the first pneumatic inlet 12 and the second pneumatic inlet 13 forward and backward.

The shaft 22 has a lower end coupled to the upper surface of the operation plate 21 and the upper end is exposed to the protruding hole 11a so as to move up and down the protruding hole 11a together with the operation plate 21. , The head 23 is coupled to the upper end.

Reference numerals 15a, 21a, and 22a, which are not described, denote O-rings for maintaining airtightness of the barrel portion 11.

The head 23 is a pressing protrusion (24a) is fitted into the inclined sliding groove (32a) of each pressing jaw (31), the vertical linear motion of the piston (20) inside and outside of each pressing jaw (31) It converts into horizontal linear motion.

Specifically, the operation portion 24 is connected to protrude outward from both sides of the side portion of the head 23, and the pressing protrusions 24a protrude on both sides of the outer end portions of each operation portion 24.

At this time, the pressing protrusion 24a may be a cylindrical protrusion, but the sliding groove 32a of the pressing jaw 31 so that the vertical operating pressure of the piston 20 can be more smoothly transmitted to the horizontal operating pressure of the pressing jaw 31 It is preferably composed of a rectangular projection formed inclined at the same angle as.

The chucking unit 30 is composed of two pressing jaws 31 arranged symmetrically to each other to correspond to the two operating parts 24 around the protruding hole 11a, and each pressing jaw 31 has a vertical It is formed to be inclined in the side diagonal direction and includes a sliding groove (32a) in which each pressing protrusion (24a) is slidably coupled.

Specifically, the pressure jaw 31 is inserted into the cylinder body (more strictly, the guide groove 16) and slidably coupled, and a first block 32 having the sliding groove 32a at an inner end thereof,

The second, coupled to one surface of the first block 32, is exposed to the outside of the cylinder body (more strictly, the outside of the guide groove 16), and has a fitting portion 33a at the inner end portion to hold the workpiece. It consists of blocks 33.

The first block 32 has a shape corresponding to the cross-sectional structure of the guide groove 16, and the sliding groove 32a is formed at an inner end to be inclined downward from the inner upper to the outer lower, and the sliding groove 32a The upper and lower surfaces of the upper and lower surfaces are opened so that the pressing protrusion 24a of the operation part 24 is fitted and coupled to the sliding groove 32a.

In addition, the first block 32 has wing portions 32b protruding from both sides of the other end (lower end), so that the wing portion 32b is fitted into the guide groove 16 while being caught by the locking end 16b, It guides the forward and backward movement of the block 32.

The second block 33 is coupled to the upper surface of the first block 32 and protrudes above the wall portions 16a of the guide groove 16, so that the two second blocks 33 are both advanced. At this time, the inner end of each second block 33 is formed in a straight structure so that the inner end of each second block 33 is in contact with each other in an interview form at the center point of the protruding hole 11a.

The second block 33 is cut in a form in which all or part of the straight inner end surrounds a part of the outer surface of the work to form a fitting portion 33a on which the work is seated.

That is, in a state in which all of the second blocks 33 are advanced, the upper and inner surfaces of the second blocks 33 are cut to fit the external shape of the work to form the cut part, the fitting part 33a, and such a fitting part In (33a), when the pressing jaws 31 are retracted, their area is widened so that the workpiece can be inserted, while the fitting portion 33a is narrowed in the advanced state of the pressing jaws 31 to pressurize and fix the workpiece.

Therefore, when pneumatic pressure is supplied to the second pneumatic inlet 13, the piston 20 rises and the pressure protrusion 24a moves to the upper end of the sliding groove 32a, while the first block 32 is moved backward. The pressure jaws (31) are separated from each other,

Blocking the pneumatic pressure of the second pneumatic inlet 13 and supplying pneumatic pressure to the first pneumatic inlet 12, the piston 20 descends and the pressure protrusion 24a of the sliding groove 32 The pressure jaws 31 are tightened in contact with the center by advancing the first block 32 while going down the inclined structure,

Accordingly, after placing the workpiece between the second blocks 33 (more precisely, between the fitting portions 33a) while the pressing jaws 31 are open, the pressing jaws 31 are gathered to the center and tightened, The pressure jaws 31 are not opened by pneumatic pressure, so the workpiece is fixed without moving.

In addition, the pressing jaw 31 includes an insertion groove 32c formed between the first block 32 and the second block 33 by spaced apart inner front ends of each block 32 and 33 by a predetermined distance,

The cylinder body 10 is coupled to one surface of the wall portions 16a forming the guide groove 16 while covering the upper opening of the protruding hole 11a, and the outer side thereof is an insertion groove of each pressing jaw 31 ( It further includes a cover plate 17 formed to be insertable in 32c).

The insertion groove (32c) is formed by a portion of the contact surface formed at the front end of the first and second blocks (32, 33) is spaced apart from each other, the height corresponding to the thickness of the cover plate 17 (same or A little big.)

In the drawings of the present specification, an exemplary embodiment in which the insertion groove 32c is provided at the upper front end of the first block 32 is illustrated, but the second block 33 alone or the first and second blocks 32 ) (33) may be provided with an insertion groove (32c) all.

The cover plate 17 together with the locking end 16b guides the forward and backward movement of the first block 32, prevents the first block 32 from being separated, and at the same time supports the lower end of the work piece to support the head ( 23) so as not to be impacted (when the fitting portion 33a is formed through both upper and lower surfaces of the second block 33).

In addition, the cover plate 17 prevents foreign substances from being caught by the sliding groove 32a and the pressing protrusion 24a being exposed to the upper opening surface of the cylinder body 10, thereby simultaneously operating the pressing jaws 31 Make it stable.

On the other hand, in the present invention, in order for the pressure jaw 31 (more strictly, the first block 32) to move back and forth smoothly in the guide groove 16, the outer surface of the wing portion 32b and the wall portion 16a It is advantageous to have a gap of a certain width between the inner sides of the

At this time, if the flatness of the wing part 32b and the guide groove 16 differ from each other due to processing errors, etc., an imbalance of the working pressure occurs when the pressure jaw 31 moves forward and backward, and this causes the first block 32 When the direction of) is twisted to one side and moves backwards and forwards, as the wing part 32b repeatedly contacts the inner surface of the guide groove 16, a scratch (also known as having) occurs, so that the pressure jaw 31 is smoothly moved forward and backward. You can't lose.

Thus, as shown in Figure 4, the wall portion (16a) is a receiving groove (16S) formed concave extending outwardly in a'c' shape from the lower surface of the locking end (16a), and the locking end (16a) ), and a stepped portion 16c protruding downward so as to be spaced apart from the outer surface of the wing portion 32b at a predetermined interval,

The receiving groove (16S) is further provided with a pair of support rollers (R1) (R2) formed to be rotatable in the front and rear horizontal direction,

The above-described problems are prevented by rolling support while the inner surfaces of the support rollers R1 and R2 exposed through the inner opening of the receiving groove 16S contact the outer surface of the wing 32b.

In addition, in the present invention, the outer diameter of the second support roller R2 arranged on the front end side of the wing portion 32b is larger than the outer diameter of the first support roller R1 arranged on the rear end side of the wing portion 32b, The inner surfaces of each of the support rollers R1 and R2 are arranged on the same line to simultaneously contact the outer surfaces of the wing 32b,

The support roller (R1) (R2) further comprises an interlocking means (40) for interlocking the movement of the left and right position,

The interlocking means 40 is hinged to the upper surface of the receiving groove 16S at the center of the support rollers R1 and R2 so that both ends seesaw movement inward and outward, and the first support at the end of the rear connection part 41A The roller (R1) is axially coupled, and the second support roller (R2) is axially coupled to the linkage member 41 at the end of the front end connection (41B),

It is provided in the inner stepped portion (16c) of the receiving groove (16S) and includes a compression spring (42) for elastically supporting the front end connection portion (41B) to the outside.

At this time, the interlocking member 41 is connected by bending the front end connection part 41B outward at a predetermined angle with respect to the rear end connection part 41A with respect to the rotation shaft 41a.

Therefore, when the first support roller (R1) having a small diameter and the second support roller (R2) having a large diameter are in contact with each other on the outer surface of the wing (32b), the elastic force of the compression spring (42) does not act, The support rollers R1 and R2 support the outer surface of the wing portion 32b at two points at the same time, so that the wing portion 32b is in close contact with the support rollers R1 and R2.

Thereafter, when the first block 32 is subjected to a force to be twisted in either left or right direction when the wing portion 32b moves forward and backward, the rear end of the wing portion 32b is pushed outward and the front end portion of the wing portion 32b It is pushed inward, so that the first support roller (R1) rotates outward and at the same time, the front end connection part (41B) is inward due to a reaction due to the external pressure of the rear end connection part (41A) by the seesaw motion structure of the linking member (41). The second support roller (R2) is pressed to rotate inward while compressing the compression spring (42).

At this time, when the interlocking member 41 performs a seesaw motion while the first and second support rollers R1 and R2 are in simultaneous contact with the wing part 32b, the difference in diameter of the support rollers R1 and R2 and Due to the bending structure of the interlocking member 41, the distance at which the second support roller R2 is horizontally moved inward becomes larger than the distance at which the first support roller R1 is horizontally moved outward.

Therefore, even if a force is received so that the direction of the wing portion 32b is pressed in one direction, the second support roller R2 rotating inward presses the wing portion 32b in the opposite direction first, and the compression spring 42 is compressed. The elastic force of the interlocking member 42 prevents the first support roller R1 from rotating outward and cancels the pressure acting to twist the wing portion 32b, so that the wing portion 32b moving forward and backward is It is aligned in a straight line without twisting left and right, and the forward and backward direction is kept constant, so that even if the back and forth of the pressurizing jaw 31 is repeated for a long time, it is possible to prevent abrasion or damage of the parts due to the twisting of the wing part 32b. do.

In the above description of the present invention, a pneumatic vise having a double jaw has been mainly described with reference to the accompanying drawings, but the present invention can be variously modified, changed, and substituted by those skilled in the art, and such modifications, changes and substitutions are the present invention. It should be interpreted as falling within the scope of protection of

10: cylinder body 11: barrel part
12: first pneumatic inlet 13: second pneumatic inlet
14: auxiliary pneumatic port 15: bottom plate
16: guide groove 17: cover plate
20: piston 21: operating plate
22: shaft 23: head
30: chucking unit 31: pressure jaw
32: first block 33: second block
40: interlocking means 41: interlocking member
42: compression spring

Claims (4)

The barrel part 11 having one side protruding hole 11a, a first pneumatic inlet 12 connected to one end of the barrel part 11, a second pneumatic inlet 13 connected to the other end of the barrel part 11 ) Having a cylinder body 10;
The operating plate 21, which is fitted into the barrel part 11 and moves forward and backward by the pneumatic supply of each pneumatic inlet 12, 13, is coupled to one surface of the operating plate 21 to appear and exit into the protruding hole 11a. A head having a shaft 22, two operating portions 24 coupled to one end of the shaft 22 and arranged symmetrically to each other, and pressing protrusions 24a protruding from both sides of each operating portion 24 ( A piston 20 comprising 23);
Consisting of two pressing jaws 31 arranged symmetrically to each other to correspond to the two operating portions 24 based on the protruding hole 11a, each pressing jaw 31 is formed to be inclined in the vertical direction Each pressing protrusion (24a) is provided with a sliding groove (32a) that is slidably coupled, the pressing jaws (31) in accordance with the forward and backward movement of the piston (20) is a workpiece located between the pressing jaws (31) by simultaneously moving forward and backward. Including; a chucking unit 30 capable of fixing the
The pressure jaw 31 is fitted into the cylinder body 10 to be slidably coupled and a first block 32 having the sliding groove 32a,
Consisting of a second block 33 having a fitting portion 33a that is coupled to one surface of the first block 32 and is exposed to the outside of the cylinder body 10 and grips the work piece at an inner end thereof
The cylinder body 10 is formed in a straight line so that the guide groove 16 to which the first block 32 is slidably coupled passes through the protruding hole 11a,
The upper end of the wall portion 16a of the guide groove 16 is provided with a locking end 16b bent inwardly connected,
The first block 32 has wing portions 32b protruding from both sides of the other end, so that the wing portion 32b is fitted into the guide groove 16 while being caught by the locking end 16b,
The wall portion (16a) has a receiving groove (16S) formed concave extending outwardly in a'c' shape from the lower surface of the locking end (16a), and a wing portion (32b) from the outside of the locking end (16a) It includes a stepped portion (16c) protruding downward so as to be spaced apart from the outer surface of the predetermined distance,
The receiving groove (16S) is further provided with a pair of support rollers (R1) (R2) formed to be rotatable in the front and rear horizontal direction,
The inner surfaces of the support rollers R1 and R2 exposed through the inner opening of the receiving groove 16S contact the outer surface of the wing part 32b to support rolling,
The outer diameter of the second support roller (R2) arranged on the front end side of the wing portion (32b) is larger than the outer diameter of the first support roller (R1) arranged on the rear end side of the wing portion (32b), but each support The inner surfaces of the rollers R1 and R2 are arranged on the same line to simultaneously contact the outer surfaces of the wing 32b,
The support roller (R1) (R2) further comprises an interlocking means (40) for interlocking the movement of the left and right position,
The interlocking means 40 is hinged to the upper surface of the receiving groove 16S at the center of the support rollers R1 and R2 so that both ends seesaw movement inward and outward, and the first support at the end of the rear connection part 41A The roller (R1) is axially coupled, and the second support roller (R2) is axially coupled to the linkage member 41 at the end of the front end connection (41B)
It is provided in the inner stepped portion (16c) of the receiving groove (16S) and includes a compression spring (42) for elastically supporting the front end connection portion (41B) outward,
The interlocking member 41 is a pneumatic vise having a double jaw, characterized in that the front connection part 41B is bent outward at a predetermined angle with respect to the rear connection part 41A with respect to the rotation shaft 41a.
The method of claim 1,
The pressure protrusion (24a) is a pneumatic vise having a double jaw, characterized in that the rectangular protrusion formed inclined at the same angle as the sliding groove (32a).
delete delete

Images