JPH08197485A - Shearing blade fitting structure - Google Patents

Abstract

PURPOSE: To prevent the unexpected fall or the like of an elastic body and also prevent the shearing direction deformation, bending, and the like of the elastic body so as to make the elastic body function always appropriately. CONSTITUTION: A movable blade 7 is fitted to a movable blade holder 6. A fixed blade 10 is disposed on a supporting plate 2, and a rear end plate 12 provided at the supporting plate 2 is horizontally pierced with a slide pin 14 to prevent slip-off. An elastic member 15 for pressing the blade face 10a of the fixed blade 10 to the blade face 7b of the movable blade 7 is provided around the slide pin 14. The movable blade 7 is provided with a guide plate 9 protruding onto the fixed blade side so as to be engaged with the front face of one end part of the fixed blade 10, and the front face of the supporting plate 2 is provided with a stopper 17 engaged with the front face 10c of the other end part of the fixed blade 10. A cutout part 17b for releasing the engagement between the stopper 17 and the fixed blade 10 is provided at least at one circumferential place of the stopper 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a shearing blade used for cutting or cutting a work made of paper, cloth, plastic film or sheet, or a laminated body thereof, and more particularly to a movable blade and a fixed blade. The blade mounting work is extremely easy, and the elastic member that presses the fixed blade blade surface against the movable blade blade surface is effectively prevented from falling or losing.

[0002]

2. Description of the Related Art As a conventional shearing blade mounting structure, for example, the one previously proposed by the applicant as Japanese Utility Model Laid-Open No. 64-23396 is known. As shown in the front view and the side view of FIGS. 6 (a) and 6 (b), the movable blade holder 53 is provided with a movable blade 51 having a linear blade edge and is guided by a guide rod 52 to perform a vertical movement. Movable blade 5 while bolting to
The support plate 5 as a fixing member at a position facing 1
4 on which a fixed blade 55, which also has a straight edge, is arranged, and which fixed blade 55 is arranged behind it to form a rear end plate 56 which is integral with the support plate 54.
And the elastic member 57 directly interposed between the fixed blade 55 and the fixed blade 55, and urges the fixed blade 55 to the front side,
The movable blade edge surface 51a can be pressed, and at the same time, one end portion of the fixed blade 55 is pulled out by a stopper 58 bolted to the front surface of the support plate 54, and the stopper 58 has a circumferential direction. A pull-out allowing portion 59 for releasing the engagement between the fixed blade 55 and the fixed blade 55 is provided at one position, and a guide plate 60 for preventing the other end portion of the fixed blade 55 from coming off is provided downward from the movable blade 51 in the drawing. It is projected and brought into contact with the fixed blade surface 55a.

In such a shear blade mounting structure, the worn movable blade 51 can be replaced by loosening the mounting bolt 61 for attaching the worn movable blade 51 to the movable blade holder 53 and removing the worn movable blade 51. Can be easily and easily carried out by sufficiently tightening and fixing it to the movable blade holder 53, and the fixed blade 55 can be replaced by first loosening the tightening bolt 62 of the stopper 58 and then the stopper 58.
Is moved to a position corresponding to the fixed blade 55, and then the fixed blade 55 released from the restraint by the stopper 58 is moved by the elastic member 57 to the support plate 54. While projecting to the front side,
By pulling out the fixed blade 55 further to the front side, the fixed blade 55 is detached from the support plate 54, and a new fixed blade 55 is placed on the support plate, and the fixed blade 55 is attached to the elastic member 57. It is retracted to a predetermined position against the spring force, and thereafter, the stopper 58 is fixed to the fixed blade 5 while keeping the fixed blade 55 at the retracted position.
By rotating the stopper 58 with the tightening bolt 62, the stopper 58 is tightened and fixed.
This too can be done easily and easily.

[0004]

However, in such a conventional technique, the elastic member 57 is merely loosely and shallowly fitted in the recessed portion provided in the fixed blade 55.
The elastic member 57 includes the fixed blade 55 and the rear end plate 5.
6 is not attached to the fixed blade 55, the elastic member 57 often drops from the recess of the fixed blade 55 when the fixed blade 55 is attached or detached, and particularly when the fixed blade 55 is removed. In many cases, the elastic member 57 was lost.

Further, in this shear blade mounting structure, the fixed blade 5
In the assembled state of No. 5, it is common to use one end portion of the coil spring as a coil spring in addition to the one end portion of the guide plate 60 protruding downward from the movable blade 51. The elastic member 57 is deformable not only in the direction of expansion and contraction but also in the direction intersecting the axis thereof, so that it is preliminarily fitted in the recess of the fixed blade 55 when the new fixed blade 55 is assembled. When the one end portion of the fixed blade 55 is inserted into the back surface side of the guide plate 60 under the compressive deformation of the inserted elastic member 57, the elastic member 57 undergoes shear deformation, and, more specifically, the elastic member 57 is not deformed. It is supposed to be assembled with it bent into a "U" shape,
There is a problem that the elastic member 57 cannot fully exhibit its original function.

A phenomenon substantially similar to this also occurs when the existing fixed blade 55 is removed from the support plate 54 and one end portion thereof is pulled out from the back surface side of the guide plate 60. In this case, However, there is a problem that permanent strain may remain in the elastic member 57 due to the shearing force in the extraction direction.

The present invention has been made as a result of studies aimed at solving the problems of the prior art, and the object of the present invention is to make a coil spring, rubber or rubber made of metal, synthetic resin or the like. The elastic member, which can be made of elastic material, can be securely prevented from accidentally falling off, and eventually from being lost due to the falling off. It is an object of the present invention to provide a shear blade mounting structure capable of surely preventing residual strain from remaining in the shear blade.

[0008]

A shear blade mounting structure according to the present invention mounts a movable blade on a movable blade holder which is guided by a guide rod to reciprocate, and is supported at a position facing the movable blade. A fixed blade is placed on the plate, and a slide pin is provided horizontally on the rear end plate provided on the support plate on the rear side of the fixed blade to prevent the slide pin from coming off, and around it, place it around the slide pin. An elastic member that urges the movable blade side to press the blade surface of the fixed blade against the blade surface of the movable blade is provided, and the movable blade protrudes toward the fixed blade side.
A guide plate that engages with the blade surface of one end of the fixed blade is provided, and a stopper that engages with the front surface of the other end of the fixed blade and prevents it from coming off is attached to the front surface of the support plate. In this case, at least one portion in the circumferential direction is provided with a slip-out allowing portion for releasing the engagement between the fixed blade and the fixed blade, for example, a notch portion.

Here, preferably, a female screw member for adjusting the slide stroke of the slide pin is screwed into one end of the slide pin, and preferably, the slide pin is
The contact surface with the fixed blade is curved. More preferably, a fixing means for fixing the fixed blade on the support plate is provided.

More preferably, the movable blade is attached to the movable blade holder by a bolt, and
At least two points spaced apart in the lengthwise direction, directly or indirectly, for example, directly below the bolt insertion hole provided in the movable blade, and directly or indirectly, have a contour dimension larger than the circumscribed circle contour of the bolt head. Forming a punched hole having.

Preferably, the stopper is a movable blade,
The spacer is attached to the front surface of the support plate through a spacer having a size corresponding to the required protrusion amount from the support plate, and more preferably, the spacer is a female screw member screwed to a bolt for attaching the stopper to the support plate.

[0012]

In this shear blade mounting structure, an elastic member that presses the fixed blade toward the movable blade is disposed around the slide rod that horizontally penetrates the rear end plate, and the slide rod is attached to the rear end plate. By preventing the elastic blade from coming off, the elastic member can still be held securely on the slide rod even when the fixed blade is removed from the support plate, so both the accidental dropping and loss of the elastic member can be ensured. Can be prevented.

Further, here, the slide pin holding the elastic member has a high rigidity against an external force in the shearing direction, and it is the slide that abuts against the fixed blade to directly press it. Since it is a pin, when assembling the fixed blade, when inserting one end of it into the back side of the guide plate, the slide pin is fixed to the slide pin under the elastic deformation of the elastic member. Neither the slide pin nor the elastic member is deformed in the shearing direction even if it receives a force in the shearing direction due to the frictional force with the blade, let alone one or both of them is bent in a V shape. Therefore, the elastic member and the slide pin can always apply the desired pressing force to the fixed blade. This also applies to the case where one end of the existing fixed blade is pulled out from the outside of the back surface of the guide plate.

In such a shear blade mounting structure, when the slide stroke of the slide pin is adjusted by a female screw member screwed to one end of the slide pin, the slide stroke is reduced to assemble the fixed blade. By reducing the amount of compressive deformation of the elastic member,
Even if the elastic pressing force acting on the fixed blade is constant, the assembling work can be facilitated.

Further, in this case, by sufficiently tightening the female screw member so that the elastic pressing force does not act on the fixed blade when the fixed blade is assembled, a shearing force is exerted on the slide pin and the elastic member. The fixed blades can be arranged on the support plate without any need. At this time, by loosening the female screw member after the fixed blade is arranged, a required elastic pressing force is applied to the fixed blade, and a required advance / retreat stroke of the fixed blade under the action of the elastic pressing force is secured.

Here, when the contact surface of the slide pin with the fixed blade is formed into a curved surface, the frictional resistance received by the fixed blade from the slide pin is effectively reduced when the fixed blade is assembled and removed. Thus, the work such as assembling the fixed blade can be performed smoothly and easily. By the way, this is more remarkable when the slide pin itself is made of a synthetic resin material or the like having a small friction coefficient.

Further, the fixed blade is positioned and fixed on the support plate so as to support the fixed blade pressing force by the elastic member, for example, penetrates the support plate and is screwed into a female screw portion provided on the fixed blade. Fixing means composed of a matching bolt or the like, or a fixing means composed of a bolt penetrating both the fixed blade and the support plate so that the head is submerged from the surface of the fixed blade, and a nut screwed to the tip end thereof. In particular, when the work is provided, the work having a large thickness can be sheared sufficiently smoothly. In other words, when a thick work is sheared under the action of elastic pressing force on the fixed blade,
The load may become too large and the stroke of the movable blade may become impossible.

Further, when at least two positions of the movable blade are provided with through holes which are continuous with the bolt insertion holes therethrough, the movable blade is removed from the movable blade holder at those two positions. Without removing the loosened tightening bolt completely, lift the movable blade, put each punched hole in a position corresponding to each bolt, and remove the movable blade from the bolt to remove all tightening bolts. It is possible to reliably prevent accidental dropping of the movable blade, which is caused by completely pulling out and removing the lock bolt.

Further, when the stopper is attached to the support plate via the spacer, the tightening amount of the stopper attachment bolt is always made constant, and the protrusion amount of the movable blade from the front face of the support plate is sheared. Can be reliably maintained at the optimum value for. In addition, when the wear of the shear blade progresses, by increasing the dimension of the spacer and increasing the protrusion amount of the movable blade according to a predetermined position,
The sharpness of the shear blade can be maintained for a long period of time.

In addition, when the spacer is composed of a female screw member screwed to the stopper mounting bolt, the spacer and the stopper should be sufficiently prevented from being accidentally detached when the stopper mounting bolt is attached and detached. You can

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing an embodiment of the present invention. The basic structure of the invented device is almost the same as that described in the prior art, and therefore the illustration thereof is omitted here.

In the figure, 1 is a supporting leg, 2 is a supporting plate fixed on the supporting leg and extending in a horizontal plane, and 3 is a supporting plate.
A guide rod mounted in a vertical posture is provided at an end portion of the support plate 2 in the longitudinal direction, and a cross member 4 is bolted to the upper ends of both guide rods to enhance the rigidity of the guide rod 3.

Here, in each guide rod 3,
The respective bosses 5 are slidably fitted in their respective axial directions, and the respective end portions of the movable blade holder 6 are fitted to the bosses 5 which are vertically driven based on the operation of a motor (not shown). At the same time, the movable blade holder 6 is tightened and fixed to the boss 5 with a tightening bolt (not shown).

Further, in this case, the movable blade holder 6 which is driven up and down together with the boss 5 is provided with the movable blade 7 having a linear blade edge 7a at a plurality of positions in its length direction, for example, at four positions by bolts 8. Firmly tighten and fix with. According to this, the movable blade 7 is brought into close contact with the front surface of the movable blade holder 6 over the entire length thereof, so that even when the movable blade 7 is warped, for example. , The effect of the warp can be sufficiently removed.

Reference numeral 9 in the drawing denotes a guide plate provided at one end of the movable blade 7 so as to project downward from the end, and the guide plate 9 has an end portion on the side where the linear blade edge 7a is most lowered. When the movable blade 7 descends, it comes into contact with the blade surface 10a of the fixed blade 10 on the support plate even when the movable blade 7 is in the raised posture. A reliable meshing of the edges 7a and 10b can be realized.

Further, as shown in a schematic perspective view in FIG.
By fixing two positioning pins 11 (only one is shown in the drawing) on the upper surface of the support plate 2 at a predetermined interval, the fixed blade 1 arranged on the support plate 2 is fixed.
The position of 0 in the longitudinal direction can be restrained preferably with a margin of about 1 mm, and in addition to the rear end of the support plate 2,
Rear plate 1 facing in the direction perpendicular to it in the longitudinal section
2 is attached, for example, by bolts.

Further, as shown in FIG. 1, on the top surface of the rear end plate 12, there is fixed a slide guide 13 for guiding the sliding movement of the fixed blade 10 arranged on the support plate in the front-rear direction. At the same time, a plurality of slide pins 14 positioned at intervals in the length direction of the rear end plate 12 are horizontally passed through the middle portion in the height direction of the rear end plate 12, and the respective slide pins 14 are While maintaining a horizontal posture,
The rear end plate 12 is made slidable in the axial direction of the rear end plate 12 by a large-diameter head 14a provided at one end thereof and a ring member 14c fixed to the other end thereof by a nut 14b. To prevent it from slipping out.

Here, in this example, an elastic member such as a coil spring is provided around the slide pin 14 between the fixed blade 10 and the rear end plate 12 at a predetermined interval in the lengthwise direction of the fixed blade 10. 15 is arranged, and this coil spring 15
Is seated on the large-diameter head 14a via a washer, and the other end is seated on the rear end plate 12 via another washer. Therefore, this coil spring 15
Will press the fixed blade 10 through the large-diameter head of the slide pin 14, and the coil spring 15 will
Even if 0 is removed from the support plate 2, it will still be reliably retained on the slide pin.

More preferably here, the nut 14
The tightening amount of b can be selected as required, which allows the stroke amount of the slide pin 14 to be adjusted.

It is also preferable that the tip end surface of the large-diameter head 14a, which is the contact surface of the slide pin 14 with respect to the fixed blade 10, has a curved shape as shown in the drawing when the fixed blade 10 is assembled and removed. The frictional resistance that it receives from the slide pin 14 is sufficiently small. This is more remarkable when the slide pin itself is made of a material having a small friction coefficient.

Further, here, in order to prevent the other end of the fixed blade 10 having one end inserted into the back side of the guide plate 9 from being pulled out to the front side of the support plate 2, the fixed blade 10 is prevented.
At the other end side of the support plate 2, the bolt 1
One stopper 17 is clamped and fixed by 6, and the stopper 17 is engaged with the front surface 10c of the fixed blade 10. Here, as is apparent from the conventional example, the stopper 17 has a front shape in which a part of the disk is cut out in an arch shape, and the stopper 17 is formed by its arcuate portion 17a. While engaging with the fixed blade 10, the notch 17b functions to release the engagement.

By the way, the displacement of the stopper 17 from the engagement position to the engagement release position and the displacement in the opposite direction are all performed with the bolt 16 loosened and the stopper 17 thus released from the constraint. , Its stopper 17
Can be performed by rotating.

The stopper 17 can be attached to the support plate 2 so as to be rotatable around the pivot pin.
In this case, only the stopper 17 can be appropriately rotationally displaced to the required position while the pivot pin is left unchanged.

Here, the sliding guide 13 described above is used.
By providing the rear projecting portion 13a as shown in FIG. 1 and inclining the rear projecting portion 13a downward, the work can be guided by the upper surface thereof.

In the mounting structure of the shear blade as described above, the movable blade 7 can be replaced by loosening and removing all bolts 8, removing the movable blade 7 from the movable blade holder 6, and then moving the new movable blade 7 Can be performed very easily and quickly by bolting the movable blade holder 6 again with the guide plate 9 provided thereon in contact with the blade surface 10a of the fixed blade 10.

When replacing the fixed blade 10, after loosening the bolt 16 of the stopper 17, the stopper 17 is replaced.
By rotating the notch 17b to a position where the notch 17b is parallel to the upper surface of the support plate 2 to stop the stopper 17 and the fixed blade 10.
Then, the fixed blade 10 is moved in the direction for removing the interference between the fixed blade 10 and the guide plate 9, that is, the front end portion of the fixed blade 10 is moved to the right side and the rear side as shown in FIG. The side edge portions are rotated to the left side to the position where there is no interference between the respective end surfaces of the fixed blade 10 and the positioning pin 11, and the fixed blade 10 is pulled out to the front side in the figure in the rotation posture. By doing so, the fixed blade 10 is removed from the support plate 2. In this case, the coil spring 15
Causes the slide pin 14 to advance to its stroke end, but since the slide pin 14 is prevented from coming off from the rear end plate 12, the coil spring 15 is surely moved to the rear end plate side. Therefore, the coil spring 15 can be sufficiently prevented from being accidentally detached.

Thereafter, a new fixed blade 10 is placed on the support plate, and one end thereof is inserted into the back surface side of the guide plate 9 under the compression deformation of the coil spring 15.
Subsequently, the other end of the fixed blade 10 is pushed against a spring force of the coil spring 15 to a predetermined position on the support plate, thereby positioning the fixed blade 10 between the positioning pins, and The stopper 17 is rotated while maintaining its posture to prevent the fixed blade 10 from coming off with its arcuate portion 17a as shown in FIG. It is needless to say that the bolt 16 is also tightened to prevent this coming off.

In this way, when assembling a new fixed blade 10, in particular, at one end of the fixed blade 10,
It is necessary to slide the fixed blade 10 with respect to the large-diameter head portion 14a of the slide pin 14 while compressing and deforming the coil spring 5 in order to insert and remove from the back surface side of the guide plate. Since the pin 14 has sufficient shear rigidity, neither the slide pin 14 nor the coil spring 5 is bent in a V shape,
Shearing does not occur, and permanent set in the shearing direction does not remain. Therefore, the coil spring 5 can always apply the desired elastic pressing force to the fixed blade 10 after assembly.

Thus, in this case, no troublesome adjustment of the spring force of the coil spring 15 is required at the time of attaching and detaching the movable blade 7 and the fixed blade 10, and the coil spring 15 may be accidentally detached. Is removed, and
It is possible to sufficiently prevent the shear deformation from occurring in the coil spring 15 and surely apply the desired pressing force to the fixed blade 10 after the assembling. Therefore, the straight blade edge 10b
The blade surface 10a of the fixed blade 10 having the
In relation to the preselected spring force, the engagement position between the fixed blade 10 and the stopper 17, and the like, a pressing force suitable for shearing the work is always reliably exerted on the blade surface 7b of the movable blade 7 being lowered. Further, the fixed blade 10 can be smoothly moved back and forth on the support plate under the action of the spring force of the coil spring 15 according to the shearing load of the work.

In the shear blade mounting structure described above, the tightening amount of the nut 14b screwed into the slide pin 14 can be adjusted over a large range so that the slide stroke of the slide pin 14 can be arbitrarily selected. In this case, the work of assembling the fixed blade 10 can be facilitated. Above all, when the fixed blade 10 is assembled, the coil spring 15 is compressed and held so that the elastic pressing force does not act there. However, when the fixed blade 10 is operated so that the required pressing force acts on the fixed blade 10 after the fixed blade 10 is placed at a predetermined position, the compression amount of the coil spring 15 is appropriately reduced. The assembling of 10 can be further facilitated, and at the same time, the action of the force in the shearing direction on the slide pin 14 and the coil spring 15 can be reliably avoided.

Here, the fixed blade 10 is attached to the support plate 2
Fixing means for fixing to, for example, as illustrated in FIG.
A long hole 18 or a large hole formed in the support plate 2 and long in the front-rear direction, a through hole 19 formed in the fixed blade 10,
In addition to the bolt 20 that is inserted through the holes 18 and 19 and the nut 21 that is screwed into the tip of the bolt 20,
When a fixing means is provided which is provided on the fixed blade 10 and which has a counterbore hole 22 for allowing the head of the bolt 2 inserted therethrough to be completely inserted, a work having a large thickness is particularly provided. In the case of shearing, by fixing the fixed blade 10 to the support plate 2 with the fixing means to prevent the function of the coil spring 15, the overloaded state can be prevented and smooth shearing can be performed.

FIG. 4 is a front view of the main part of another embodiment of the present invention, which shows a large-diameter loose fitting hole 23 formed by penetrating the support plate 2 with the fixing means of the fixed blade 10. Fixed blade 1
The number of components of the fixing means is reduced by constructing the female screw portion 24 provided at 0 and the bolt 25 that is inserted from the large diameter loose fitting hole and screwed into the female screw portion 24. The head of the bolt 8 is continuously positioned below the insertion hole 26 of the bolt 8 at two positions of the movable blade 7 which are fixedly fastened to the movable blade holder 6 by bolts 8 and are separated from each other in the longitudinal direction. A punched hole 27 having a contour size larger than the circumscribed circle contour of the portion is formed.

Here, these holes 27 are formed in the bolt 8
The movable blade 7 is moved to a position where the both holes 27 correspond to the heads of the bolts 8 in a state in which the movable blades 7 are sufficiently loosened, and then the movable blades 7 are pulled toward the heads of the bolts 8 to move the movable blades 7. Since the blade 7 is allowed to be detached from the movable blade holder 6, only after completely removing all the bolts 8,
Compared with the above-described embodiment in which the movable blade 7 can be detached from the movable blade holder 6, the risk of accidental detachment of the movable blade 7 can be sufficiently eliminated. The same applies to the attachment to the movable blade holder 6, and the bolt 8 remaining in the movable blade holder 6 is previously engaged with the movable blade 7 through the removal hole 27, so that there is no risk of it falling off. Can be removed.

In the figure, the bolt insertion hole 26 and the extraction hole 27 are connected in the vertical direction through an intermediate portion having the same diameter as that of the insertion hole 26. By directly connecting the holes 27 with each other, the contours of both holes can be made into a polished shape or the like, and the continuous direction thereof can be leftward or rightward.

FIG. 5 is a longitudinal sectional view of a main part showing still another embodiment of the present invention. In this example, when the stopper 17 is attached to the front surface of the support plate 2 by the bolt 16, both the support plate 2 and the stopper 17 are brought into contact with the bolt to project the movable blade 10 from the front surface of the support plate. A spacer 28 for specifying the amount is arranged. According to this, the tightening amount of the bolt 16 can be made constant at all times by preselecting the axial length of the spacer 28. The amount of protrusion of 10 from the support plate 2 can be set to an optimum value for shearing the work.

Therefore, as compared with the case where the amount of protrusion of the movable blade 10 is adjusted without using a spacer, excellent sharpness can be always realized, and due to the collision of the blade edge of the shear blade. The risk of chipping or cracking of the blade can be fully eliminated.

Here, the dimension of the spacer 28, in other words, the length in the axial direction, can be gradually lengthened as the wear of the shearing blade progresses. According to this, the protruding amount of the movable blade 10 is set at a predetermined value. The sharpness of the shear blade can be maintained for a long period of time by gradually increasing the amount in a fixed amount. Further, the axial length of the spacer 28 can be shortened as the thickness of the work to be sheared becomes thicker, thereby effectively preventing the overload action on the shearing blade when shearing a thick work. can do.

In this case, when the spacer 28 is formed of a female screw member screwed to the bolt 16, for example, a nut, the stopper 17 and the spacer 28 fitted to the bolt 16 are accidentally attached or detached when the bolt 16 is attached or detached. It is possible to sufficiently prevent the desorption.

Although the present invention has been described with reference to the illustrated example, the elastic means for pressing the fixed blade may be made of rubber or a rubber-like elastic material, and the number of the elastic means arranged is three or more. It can also be a plurality of. In addition, in the illustrated example, the shapes of the engagement portion and the engagement releasing portion of the stopper formed by the arcuate portion and the arcuate notch portion, respectively, are sufficient as long as the original functions thereof can be sufficiently exhibited.
It is possible to change it to a suitable shape such as a convex portion or a concave portion, and it is also possible to form the engagement releasing portions at a plurality of positions in the circumferential direction.

[0050]

As is apparent from the above description, according to the present invention, in particular, by providing the elastic member on the slide pin that is prevented from coming off from the rear end plate, the elasticity of the elastic member can be improved. It is possible to sufficiently remove the risk of accidental dropout or loss of the member, and to sufficiently prevent the elastic member from shearing, bending, and remaining permanent strain there, so that the elastic member is always maintained. It can function properly.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic line perspective view showing an assembled state of each blade.

FIG. 3 is an exploded perspective view illustrating a fixing means of a fixed blade.

FIG. 4 is a front view of a main portion showing another embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a main part showing still another embodiment of the present invention.

FIG. 6 is a front view and a side view showing a conventional example.

[Explanation of symbols]

 1 Support Leg 2 Support Plate 3 Guide Rod 4 Cross Member 5 Boss 6 Movable Blade Holder 7 Movable Blade 7a Straight Blade Edge 7b Blade Surface 8 Bolt 9 Guide Plate 10 Fixed Blade 10a Blade Surface 10b Straight Blade Edge 10c Front Surface 11 Positioning Pin 12 Rear end plate 13 Sliding guide 14 Sliding pin 14a Enlarged head 14b Nut 14c Ring member 15 Coil spring 16 Bolt 17 Stopper 17a Spiral part 17b Notch 18 Long hole 19 Through hole 20, 25 Bolt 21 Nut 22 Counterbore hole 23 Large-diameter loose fitting hole 24 Female screw portion 26 Insertion hole 27 Extraction hole 28 Spacer

Claims (7)

[Claims] 1. A movable blade is attached to a movable blade holder that reciprocates, a fixed blade is arranged on a support plate at a position facing the movable blade, and a slide pin is attached to a rear end plate provided on the support plate. Prevent it from coming off by passing it horizontally, and around the slide pin, the blade surface of the fixed blade,
An elastic member that presses against the blade surface of the movable blade is provided, and the movable blade is provided with a guide plate that projects toward the fixed blade side and engages with the blade surface of one end portion of the fixed blade, and that of the support plate. On the front surface, a stopper that engages with the front surface of the other end of the fixed blade is provided, and at least one position in the circumferential direction of the stopper is provided with a slip-out allowing portion that releases the engagement between it and the fixed blade. Mounting structure. 2. The shear blade mounting structure according to claim 1, wherein a female female member for adjusting a slide stroke of the slide pin is screwed onto one end of the slide pin. 3. The shear blade mounting structure according to claim 1, wherein the contact surface of the slide pin with respect to the fixed blade is curved. 4. The shear blade mounting structure according to claim 1, further comprising fixing means for fixing the fixed blade on a support plate. 5. The movable blade is attached to a movable blade holder by a bolt, and the movable blade is located at at least two positions of the movable blade continuously with a bolt insertion hole formed in the movable blade, and the circumscribed edge of the head of the bolt is set. The shear blade mounting structure according to any one of claims 1 to 4, wherein a punched hole having a contour size larger than the contour is formed. 6. The shear blade mounting structure according to claim 1, wherein the stopper is mounted on the front surface of the support plate via a spacer. 7. The shear blade mounting structure according to claim 6, wherein the spacer is formed by a female screw member screwed to a bolt for mounting the stopper to the support plate.