JP2008100328A - Cutter fixing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter fixing tool which has compact stopper-related component members. <P>SOLUTION: The cutter fixing tool 1 is formed of a support cylinder 11 to which a fitting portion 6 of a cutter 2 is removably fitted, a lock operator 13 supported with respect to the cylinder 11 so as to be rotatable between a locking position and a lock canceling position Q, and a plurality of movable lock balls 19 supported by the support cylinder 11. The movable lock balls 19 can assume a locking state when the lock operator 13 is in the locking position and a lock canceling state SQ when the lock operator 13 is in the lock canceling position Q. Then the support cylinder 11 has a stopper shaft 24 movably arranged therein at a location decentered from a rotation center 2a of the cutter 2. The stopper shaft 24 assumes a stopper state DQ that holds one of the movable lock balls 19 in the lock canceling state SQ and a stopper canceling state that recedes from the one movable lock ball 19. As a result, in the cutter fixing tool 1, wobbling of the stopper shaft 24 with respect to the movable lock balls 19 is prevented, and the component members related to the stopper shaft 24 are made compact. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutter fixture for supporting various cutters such as a perforation cutter, particularly a shank of a perforation cutter.

In general, in this type of cutter mounting tool, a support cylinder into which the insertion part of the cutter is removably fitted, and a lock position and a lock release position that are rotatably fitted to the outer periphery of the support cylinder are provided. A lock operation cylinder that can be taken, and a plurality of movable lock balls arranged in parallel in the circumferential direction with respect to the support cylinder. A plurality of lock recesses are arranged in the circumferential direction in the insertion portion of the cutter. The movable lock ball has a lock state in which the lock operation tube is engaged with each lock recess of the insertion portion at the lock position of the lock operation tube, and a lock that is released from the lock recess of the insertion portion at the lock release position of the lock operation tube. Can be released. For example, in Patent Document 1 below, an annular stopper that is a compression coil spring is fitted inside the support cylinder. The annular stopper is moved by its elastic force to hold the movable lock balls in an unlocked state, and in the stopper state, the annular stopper is pushed against the elastic force by the cutter insertion portion to move each movable ball. Take the stopper released from the lock ball. In addition to the following Patent Document 1, as this kind of annular stopper, there is also known one in which an annular body biased by a compression coil spring is fitted inside a support cylinder.
Japanese Patent No. 3606094

  In the above-mentioned Patent Document 1, a stopper which is a compression coil spring is annularly arranged along the inner periphery of the support cylinder in the entire circumferential direction with respect to the rotation center line of the cutter, and one stopper simultaneously unlocks each movable lock ball in the unlocked state. Therefore, it is necessary to increase the mounting accuracy of the stoppers inserted between the movable lock balls so as to eliminate the rattling of the movable lock balls with respect to the stopper, which may increase the cost. Further, the volume of the stopper occupying the inside of the support cylinder is increased, and there is a possibility that the cost is increased due to lack of compactness of parts related to the stopper.

  An object of the present invention is to make it difficult for the cutter shaft to rattle the stopper shaft with respect to the movable lock body. Another object of the present invention is to make parts related to the stopper compact in the cutter fixture.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 5) of the embodiments described later.
The cutter fixture according to the invention of claim 1 is configured as follows.
This cutter fixture 1 is movable to a lock position P and a lock release position Q with respect to the support cylinder 11 having a support hole 14 into which the insertion portion 6 of the cutter 2 is removably fitted. The supported lock operating body 13 and the movable lock body 19 supported on the support cylinder 11 by the inner peripheral surface 12b of the support hole 14 of the support cylinder 11 facing the insertion / removal locus surface of the outer peripheral surface 8 of the insertion portion 6 of the cutter 2. And. The movable lock body 19 includes a lock state RP that enters the inside of the insertion / removal locus surface of the outer peripheral surface 8 at the lock position P of the lock operation body 13, and an insertion of the outer peripheral surface 8 at the lock release position Q of the lock operation body 13. An unlocked state SQ that can escape to the outside of the escape path surface can be taken. A stopper shaft 24 is provided on the support cylinder 11 at an eccentric position with respect to the rotation center line 2a of the cutter 2 so as to be movable along the rotation center line 2a, for example. The stopper shaft 24 takes a stopper state DQ for holding the movable lock body 19 in the unlocked state SQ and a stopper release state UP for retracting from the movable lock body 19. For example, when a plurality of the movable lock bodies 19 are arranged in the circumferential direction with respect to the rotation center line 2 a of the cutter 2, some of the movable lock bodies 19 or all of the movable lock bodies 19 are included. One stopper shaft 24 holds one movable lock ball 19 in the unlocked state SQ.

  In the invention of claim 2 based on the invention of claim 1, a plurality of the movable lock bodies 19 are arranged in the circumferential direction with respect to the rotation center line 2 a of the cutter 2, and the stopper shaft 24 is provided for each movable lock body 19. Among them, a part of the movable lock bodies 19, for example, one movable lock body 19 is held in the unlocked state SQ. At that time, one stopper shaft 24 holds one movable lock ball 19 in the unlocked state SQ.

  In the invention of claim 3 premised on the invention of claim 1 or claim 2, the stopper shaft 24 is urged by a stopper spring 23 and is moved by the elastic force of the stopper spring 23 to become the stopper state DQ. In the stopper state DQ, the stopper 2 is pushed against the elastic force of the stopper spring 23 by the insertion portion 6 of the cutter 2 to enter the stopper release state UP.

  In the invention of claim 4 based on the invention of claim 1, claim 2, or claim 3, the lock operating body 13 is biased by a lock spring 16 and is rotated by the elastic force of the lock spring 16. The lock position P is reached, and the lock spring 16 rotates against the elastic force of the lock spring 16 to reach the lock release position Q.

The cutter fixture according to the invention of claim 5 is configured as follows.
The cutter fixture 1 includes a support cylinder 11, a lock operation cylinder 13, and a lock mechanism portion 17 described below. In the support cylinder 11, the insertion portion 6 provided on the cutter 2 has a support hole 14 that is removably fitted in the direction of the rotation center line 2 a of the cutter 2, and the outer peripheral surface 8 of the insertion portion 6. Is fitted to the inner peripheral surface 12 b of the support hole 14. The lock operation tube 13 has a guide hole 15 that is fitted to the outer periphery of the support tube 11 so as to be rotatable about the direction of the rotation center line 2 a of the cutter 2, and the outer peripheral surface 12 a of the support tube 11. Faces the inner peripheral surface 15 a of the guide hole 15. The lock mechanism 17 has a plurality of receiving holes 18 arranged in parallel with the support cylinder 11 in the rotation direction X of the lock operating cylinder 13 on the outer periphery of the support hole 14. The lock body 19 is fitted and supported so as to be movable between the inner and outer peripheral surfaces 12b, 12a of the support cylinder 11. On the inner peripheral surface 15a of the guide hole 15 of the lock operating cylinder 13, a retracting recess 20 in which the movable lock body 19 protruding from the outer peripheral surface 12a of the support cylinder 11 is engaged, and a retracting restricting surface for restricting the protrusion. 21 are alternately arranged in the rotation direction X of the lock operation tube 13. At the lock position P where the lock operation cylinder 13 is rotated by the elastic force of the lock spring 16, the movable lock body 19 in contact with the retraction restricting surface 21 of the lock operation cylinder 13 protrudes from the inner peripheral surface 12 b of the support cylinder 11. Then, the outer peripheral surface 8 of the insertion portion 6 of the cutter 2 inserted into the support hole 14 of the support cylinder 11 is engaged with a plurality of lock recesses 9 arranged in parallel in the rotation direction X of the lock operation cylinder 13. The lock operation tube 13 is rotated against the elastic force of the lock spring 16 so that the insertion portion 6 of the cutter 2 is removed from the support hole 14 of the support tube 11, and the outer periphery of the support tube 11 is The movable lock body 19 protruding from the surface 12 a is engaged with the retracting recess 20 of the lock operation cylinder 13. A stopper shaft 24 urged by a stopper spring 23 is inserted into a stopper hole 22 provided in the support cylinder 11 at an eccentric position with respect to the rotation center line 2a of the cutter 2 so as to be movable along the rotation center line 2a, for example. ing. The stopper shaft 24 is moved by the elastic force of the stopper spring 23 and a part of the movable lock bodies 19, for example, one movable lock body 19 is held in the unlocked state SQ. In the stopper state DQ, a part of the movable lock bodies 19, for example, one movable lock body 19 is pushed by the insertion portion 6 of the cutter 2 against the elastic force of the stopper spring 23. Take the stopper release state UP to evacuate.

  According to the first to fifth aspects of the present invention, it is possible to make it difficult for the cutter shaft 1 to rattle the stopper shaft 24 with respect to the movable lock body 19. Moreover, the invention of Claims 1-5 can make compact the components relevant to the stopper shaft 24 in the cutter fixture 1. According to the third and fifth aspects of the present invention, the cutter 2 can be easily attached to the cutter fixture 1. In the inventions of claims 4 and 5, the cutter 2 can be easily detached from the cutter fixture 1.

Hereinafter, a cutter fixture according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, in the cutter 2 attached to the cutter fixture 1, the perforated blade cylinder 5 is screwed to the connecting portion 4 formed in the lower half portion of the shank 3, and formed in the upper half portion of the shank 3. The inserted insertion part 6 is arranged in parallel on the upper side of the perforated blade cylinder 5. A center hole 7 is formed through the insertion portion 6 and the connecting portion 4 of the shank 3 on the rotation center line 2a. The outer peripheral surface 8 (insertion / removal trajectory surface) of the insertion portion 6 has a circular shape centered on the rotation center line 2a, and a plurality (three) of lock recesses 9 with respect to the rotation center line 2a are formed on the outer peripheral surface 8. They are arranged at equal intervals in the circumferential direction. In addition, although the insertion part of the cutter 2 means the said shank 3 itself, although not shown, it means a shank including a sleeve and a socket into which this shank 3 is inserted.

  As shown in FIGS. 1 and 2, in the cutter fixture 1, a shank 10 that is detachably supported with respect to a machine tool (not shown) is integrally formed on the upper side of the support cylinder 11. A lock operation cylinder 13 as a lock operation body is inserted into the outer periphery of the mouth cylinder part 12 formed in the lower half part so as to be rotatable in the rotation direction X about the rotation center line 2 a of the cutter 2. A support hole 14 is formed in the mouth tube portion 12 and is opened downward. An inner peripheral surface 15 a of the guide hole 15 formed inside the lock operation tube 13 faces the outer peripheral surface 12 a of the mouth tube portion 12. A lock spring 16 (torsion coil spring) is wound around the outer periphery of the mouth tube portion 12 inside the lock operation tube 13, and one end portion 16 a of the lock spring 16 is hooked on the upper half of the support tube 11. In addition, the other end 16 b of the lock spring 16 is hooked on the lock operation cylinder 13. As shown in FIGS. 3 and 4, the lock operation cylinder 13 includes a lock position P that is rotated by the elastic force of the lock spring 16 in one lock direction XP of both sides of the rotation direction X, and FIGS. As shown in FIG. 5, a lock release position Q that rotates against the elastic force of the lock spring 16 in the other unlocking direction XQ of both sides of the rotation direction X is taken.

  As shown in FIGS. 2, 3, and 5, in the cutter fixture 1, a plurality (three) of lock mechanism portions 17 are provided between the mouth tube portion 12 and the lock operation tube 13. 2a are arranged at equal intervals in the circumferential direction. In each lock mechanism portion 17, an accommodation hole 18 is arranged in the mouth tube portion 12 on the outer periphery of the support hole 14 in parallel in the rotation direction X of the lock operation tube 13, and opens outward from the outer peripheral surface 12 a of the mouth tube portion 12. 18a, and the inner peripheral surface 12b of the mouth tube portion 12 is opened at the inner opening 18b. A movable lock ball 19 as a movable lock body is fitted into each accommodation hole 18, and both the inner and outer openings 18a, It is supported so as to be movable between 18b. In addition, a plurality (three) of retraction recesses 20 are arranged at equal intervals in the circumferential direction with respect to the rotation center line 2a of the cutter 2 on the inner peripheral surface 15a of the guide hole 15 of the lock operation tube 13, and each retraction recess 20 and The retraction restricting surfaces 21 between them are alternately arranged in the rotation direction X of the lock operation cylinder 13.

  In the cutter fixture 1, a stopper hole 22 extends along the rotation center line 2 a in the upper half of the support cylinder 11 at an eccentric position with respect to the rotation center line 2 a of the cutter 2, and is formed in the support hole 14 on the lower side. A stopper shaft 24 biased by a stopper spring 23 (compression coil spring) is inserted into the stopper hole 22 so as to be movable along the rotation center line 2a. A guide groove 25 is provided on the outer periphery of the stopper shaft 24 along the rotation center line 2a, and a guide ball 27 supported by a set screw 26 on the upper half of the support cylinder 11 is exposed to the stopper hole 22. The guide groove 25 is engaged. As shown in FIGS. 1 and 2, the stopper shaft 24 protrudes from the stopper hole 22 to the support hole 14 by the elastic force of the stopper spring 23 and faces one of the lock mechanism portions 17; As shown in FIGS. 3, 4, and 5, a stopper release state UP in which the stopper spring 23 enters the stopper hole 22 against the elastic force of the stopper spring 23 is taken.

  In the centering drill 28 shown in FIGS. 1 and 4, the shank 28 a is inserted into the upper half of the support tube 11 from the lower side of the mouth tube portion 12 through the support hole 14 and fixed by the set screw 29. The blade portion 28 b protrudes downward from the mouth tube portion 12.

  As shown in FIG. 1, in the disassembled state in which the cutter 2 is removed from the cutter fixture 1, in the cutter fixture 1, the lock operation tube 13 is in the unlock position Q, and the stopper shaft 24 is in the stopper state. In DQ. In this disassembled state, as shown in FIG. 2, in each lock mechanism portion 17, the movable lock ball 19 protrudes from the outer peripheral surface 12 a of the mouth tube portion 12 and can be engaged with the retreat recess 20 of the lock operation tube 13. Further, in one lock mechanism portion 17 among the lock mechanism portions 17, the stopper shaft 24 faces the movable lock ball 19, and the movable lock ball 19 is sandwiched between the retracting recess 20 and the stopper shaft 24. The lock release state SQ is entered. In this unlocked state SQ, the movable lock ball 19 can be prevented from projecting from the inner peripheral surface 12b of the mouth tube portion 12 toward the support hole 14 side. The movable lock ball 19 that does not face the stopper shaft 24 in the unlocked state SQ can move freely in the accommodation hole 18.

  As shown in FIG. 2, the cutting blade portion 28b and the shank 28a of the centering drill 28 are inserted into the center hole 7 of the insertion portion 6 of the cutter 2 in the disassembled state, and the insertion portion 6 is connected to the mouth tube portion. 12 are inserted into the support holes 14 and pressed against the stopper shaft 24. Further, when the outer peripheral surface 8 of the insertion portion 6 is fitted to the inner peripheral surface 12b of the support hole 14, the stopper shaft 24 resists the elastic force of the stopper spring 23 as shown in FIGS. When pushed up, the stopper state DQ changes to the stopper release state UP, and the lock operation tube 13 rotates from the lock release position Q to the lock direction XP to reach the lock position P. At that time, in each lock mechanism portion 17, the movable lock ball 19 is pushed by the retraction restricting surface 21 of the lock operation tube 13 and protrudes from the inner peripheral surface 12 b of the mouth tube portion 12 to the support hole 14 side, and the insertion portion 6. The locked state RP is engaged with the lock recess 9.

  As shown in FIG. 5, when the lock operating tube 13 is rotated from the lock position P to the unlocking direction XQ against the elastic force of the lock spring 16 in the locked state RP to the unlocked position Q, In the lock mechanism portion 17, the movable lock ball 19 can be engaged with the retracting recess 20 of the lock operation cylinder 13, and can move freely within the accommodation hole 18. Immediately thereafter, when the insertion portion 6 of the cutter 2 is pushed down via the stopper shaft 24 by the elastic force of the stopper spring 23, the movable lock ball 19 is detached from the lock recess 9 of the insertion portion 6 in each lock mechanism portion 17. Thus, the insertion portion 6 comes out of the support hole 14 of the mouth tube portion 12, the stopper shaft 24 returns to the stopper state DQ, and each movable lock ball 19 returns to the unlocked state SQ.

This embodiment has the following effects.
* Since the stopper shaft 24 is movably provided on the support cylinder 11 at an eccentric position with respect to the rotation center line 2a of the cutter 2, and one stopper shaft 24 holds one movable lock ball 19 in the unlocked state SQ, the stopper shaft 24 And the volume of the stopper shaft 24 occupied by the support hole 14 of the mouth tube portion 12 of the support cylinder 11 is reduced, and the parts related to the stopper shaft 24 are compact. Can be summarized. Therefore, the cost can be reduced.

  * Since the stopper shaft 24 holds only one movable lock ball 19 in each unlocked state SQ in the unlocked state SQ in the stopper state DQ, the lock operating tube 13 is held in the unlocked position Q. The parts related to 24 can be collected even more compactly.

  * When the insertion portion 6 of the cutter 2 is inserted into the support hole 14 of the mouth tube portion 12 of the support cylinder 11, the stopper shaft 24 is simply pushed against the elastic force of the stopper spring 23 by the insertion portion 6. The movable lock ball 19 can be changed from the unlocked state SQ to the locked state RP by moving the stopper shaft 24 from the stopper state DQ to the stopper released state UP. In that case, the lock operation tube 13 automatically returns from the unlock position Q to the lock position P by the elastic force of the lock spring 16. Therefore, the cutter 2 can be easily attached to the cutter fixture 1.

  * The stopper shaft 24 can be moved from the stopper release state UP only by rotating the lock operation tube 13 from the lock position P to the lock release position Q against the elastic force of the lock spring 16 in the locked state RP of the movable lock ball 19. It moves to the stopper state DQ by the elastic force of the stopper spring 23 to work so as to remove the insertion portion 6 of the cutter 2 from the support hole 14 of the mouth tube portion 12 of the support tube 11 and move the movable lock ball 19 from the lock state RP. It can be held by the stopper shaft 24 in the unlocked state SQ. Therefore, the cutter 2 can be easily removed from the cutter fixture 1.

In addition to the above embodiment, the following configuration may be used.
In the above embodiment, three movable lock balls 19 are arranged in the circumferential direction with respect to the rotation center line 2a of the cutter 2. However, one or two movable lock balls 19 are arranged in parallel or four or more in parallel.

  In the embodiment, only one movable lock ball 19 is held in the unlocked state SQ by the stopper shaft 24 among the three movable lock balls 19 arranged in parallel in the circumferential direction with respect to the rotation center line 2a of the cutter 2. In addition, some (other than one) or all of the plurality of movable lock balls 19 are held in the unlocked state SQ by the stopper shaft 24.

-The stopper spring 23 and the lock spring 16 are omitted.
-Change the cutter 2 to a drilling cutter other than the annular cutter, such as a drill or a reamer.

(A) is a front view which shows the state which removed the cutter from the cutter fixture concerning this embodiment, (b) is sectional drawing seen similarly from the front side, (c) is crossing of this cutter fixture It is a top view, (d) is a cross-sectional view of this cutter. (A) is the fragmentary sectional view which looked at the middle state which attaches the said cutter to the said cutter attachment tool from the front side, (b) is a cross-sectional view similarly. (A) is the fragmentary sectional view which looked at the state which attached the above-mentioned cutter to the above-mentioned cutter fixture from the front side, and (b) is a transverse cross-sectional view similarly. (A) is a front view which shows the state which attached the said cutter to the said cutter fixture, (b) is sectional drawing seen similarly from the front side. (A) is the fragmentary sectional view which looked at the halfway state which removes the said cutter from the said cutter fixture from the front side, (b) is a cross-sectional view similarly.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cutter attachment tool, 2 ... Cutter, 2a ... Rotation center line, 6 ... Insertion part of cutter, 8 ... Outer peripheral surface of insertion part, 9 ... Lock recessed part of insertion part, 11 ... Support cylinder of cutter attachment tool , 13 ... Lock operation cylinder as a lock operating body of the cutter mounting tool, 14 ... Support hole of the support cylinder, 12a ... Outer peripheral surface of the support cylinder, 12b ... Inner peripheral surface of the support hole of the support cylinder, 15 ... Guide hole, 15a ... Inner peripheral surface of guide hole, 16 ... Lock spring, 17 ... Lock mechanism part, 18 ... Housing hole of support cylinder, 19 ... Movable lock ball as movable lock body, 20 ... Retraction recess of lock operation cylinder , 21 ... Retraction restriction surface of the lock operation cylinder, 22 ... Stopper hole, 23 ... Stopper spring, 24 ... Stopper shaft, P ... Lock position of the lock operation cylinder, Q ... Lock release position of the lock operation cylinder, RP ... Movable lock ball Lock state, SQ ... movable lock ball Unlocked state, UP ... stopper release state, DQ ... stopper state, the rotational direction of the X ... lock the operating tube.

Claims (5)

A support cylinder having a support hole into which the insertion section of the cutter is removably fitted, a lock operating body supported so as to be movable between a lock position and an unlock position with respect to the support cylinder, and an outer periphery of the insertion section of the cutter A movable lock body supported by the support cylinder on the inner peripheral surface of the support hole of the support cylinder facing the insertion / removal locus surface of the surface, and the movable lock body is inserted and removed from the outer peripheral surface at the lock position of the lock operating body. In the cutter fixture that can take a locked state that enters the inside of the locus surface and a unlocked state that can escape to the outside of the insertion / removal locus surface of the outer peripheral surface at the unlocking position of the lock operating body,
A stopper shaft is movably provided on the support cylinder at an eccentric position with respect to the rotation center line of the cutter. The stopper shaft is configured to hold the movable lock body in an unlocked state, and a stopper retracted from the movable lock body. A cutter fixture characterized by taking a released state. The movable lock bodies are arranged in a plurality in a circumferential direction with respect to a rotation center line of the cutter, and the stopper shaft holds a part of the movable lock bodies in an unlocked state. The cutter fixture according to 1. The stopper shaft is urged by a stopper spring and moved by the elastic force of the stopper spring to be in the stopper state. The cutter fixture according to claim 1 or 2, wherein the stopper is released. The lock operating body is urged by a lock spring, and is rotated by the elastic force of the lock spring to be in the locked position, and is rotated against the elastic force of the lock spring to be in the unlocked position. The cutter fixture according to claim 1, claim 2, or claim 3. A support cylinder in which an insertion portion provided in the cutter has a support hole that is removably fitted in the direction of the rotation center line of the cutter, and an outer peripheral surface of the insertion portion is fitted to an inner peripheral surface of the support hole When,
A lock operation cylinder having a guide hole that is fitted to the outer periphery of the support cylinder so as to be rotatable about the rotation center line direction of the cutter, and the outer peripheral surface of the support cylinder faces the inner peripheral surface of the guide hole; ,
It has a plurality of accommodation holes arranged in parallel to the rotation direction of the lock operation cylinder on the outer periphery of the support hole with respect to the support cylinder, and a movable lock body is fitted in each accommodation hole between the inner and outer peripheral surfaces of the support cylinder. A lock mechanism that is movably supported,
On the inner peripheral surface of the guide hole of the lock operation tube, a retraction recess into which the movable lock body protruding from the outer peripheral surface of the support tube is engaged, and a retraction restricting surface for restricting the protrusion are rotated around the lock operation tube. Alternately arranged in the direction of movement,
At the lock position where the lock operation cylinder is rotated by the elastic force of the lock spring, the movable lock body that is in contact with the retraction restricting surface of the lock operation cylinder protrudes from the inner peripheral surface of the support cylinder and enters the support hole of the support cylinder. Engaged in a plurality of lock recesses arranged in parallel in the rotation direction of the lock operation cylinder on the outer peripheral surface of the insertion portion of the inserted cutter,
At the unlocked position where the lock operating cylinder is rotated against the elastic force of the lock spring to disengage the cutter from the support hole of the support cylinder, the movable lock body protruding from the outer peripheral surface of the support cylinder is Engaged in the retracting recess of the lock operation cylinder,
A stopper shaft urged by a stopper spring is movably inserted into a stopper hole provided in the support cylinder at an eccentric position with respect to the rotation center line of the cutter, and this stopper shaft is moved by the elastic force of the stopper spring. A stopper state for holding a part of the movable lock bodies in the unlocked state among the movable lock bodies, and each movable body being pushed against the elastic force of the stopper spring by the insertion portion of the cutter in the stopper state. A cutter fixture characterized by taking a stopper release state in which a part of the lock body is retracted from a movable lock body.

Images