KR0180822B1 - Sheet cutting device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cutting device having excellent quietness, wherein a sheet cutting device for cutting sheet materials by reciprocating a cutting blade, wherein the spirals of forward and return having mutually reversed relations are continuous at least in one direction. The movable body which rotatably supported the shaft 1 which has the spiral guide path 2 comprised by the said structure, and the engaging member 19 which engages with the said spiral guide path 2 which supported the cutting blades 5a and 5b. (4), the spiral guide path (2) and the engaging member (19) are formed by resin molding. Further, the first guide surface 33a for guiding the cut end of the sheet member downward in the cutting direction rear of the moving body 4, the second guide surface 33b for discharging the cut end in a round shape, and the rounded cut end. A forced discharge part 33 having a third guide surface 33c and the like placed under the feeding direction of the sheet material is provided, and it has a quietness that can be used by being assembled to an OA machine, and stable cutting is possible without breaking the cutting surface. It is possible.

Description

Sheet cutting device with excellent quietness

The present invention relates to a sheet cutting device that is used to be assembled to OA equipment such as copiers, printers, facsimile, in particular, to improve the quietness by improving the movement of the cutting blade sheet cutting to achieve a stable cutting Relates to a device.

The sheet cutting device mounted in OA equipment such as copiers, printers, and facsimile machines includes, for example, a so-called rotary sheet cutting device for interlacing and cutting a straight blade turning on a fixed blade described in Japanese Patent Publication No. 50-24466; There is a so-called slide sheet cutting device for interlacing and cutting the movable blade moving up and down with the fixed blade described in Dongkuk Utility Publication No. 58-37594, but these cutting devices do not drive the blade of the length corresponding to the cutting side. As the cutting side becomes wider, the driving force increases, making it difficult to miniaturize.

On the other hand, a cutting device for pressing and sliding the circular blade or knife-shaped blade described in Dongkuk Utility Publication No. Hei 4-128195 to the fixed blade and cutting the blade tip of Dongkuk Patent Publication Hei 7-52085 It is known that a blade moving type cutting device such as a roll type sheet cutting device of the same type is used for cutting a sheet material by moving a blade having two circular blades. Compared with the slide type sheet cutting device, the power required for blade driving is less and the restriction on the cutting side is less, which makes it possible to reduce the size even for large cuttings. In particular, the rolled sheet material with the latter two circular blades Since the cutting device does not use a long fixed blade, it is more advantageous for miniaturization and light weight.

The blade moving means of the blade moving device may be a moving device for reciprocating the blade by a wire or a toothed belt, but such a moving device has a blade stripper due to inertia when the blade turns to the end portion. There was a problem in applying to an assembly apparatus of an OA mechanism that requires quietness, such as generating noise by colliding with a back. For this reason, a screw-driven moving device is used to reciprocate the blade by forward and reverse rotation of the shaft by fitting the screw of the shaft to the screw for installation on the blade. In such a screw-driven moving device, when a blade is reciprocated, a limit switch is provided at the end of forward or return to perform forward / backward switching of a drive mechanism such as a motor.

In addition, a roll-type sheet cutting device is generally a method of cutting the cutting edge of the sheet material during cutting, freely dropping after cutting and collecting in a bowl, but in particular, the cutting sheet without a guide on the top is placed on the upper surface of the frame. In the roll-type sheet cutting device of the preset structure which can be simply cut and cut, the driving part is located on the lower surface of the frame, so that the sheet material after cutting is interrupted on the blade when the moving chain blade reciprocates. Make it blurred. To prevent this, for example, in Japanese Patent Laid-Open Publication No. Hei 6-134692 or Japanese Patent Laid-Open Publication No. Hei 7-52085, the front end of the sheet material after cutting is cut from the cutting point at which the disc blade and the fixed blade or the disc blade and the disc blade are slid. A discharge structure is known which allows for forced discharge at a remote location if possible.

However, the conventional screw-driven moving device requires a reverse switching mechanism and its control circuit by a limit switch, and is disadvantageous for a small-cost request because of the complexity of the number of parts. In addition, the OA mechanism is particularly demanding in the operation of the cutting device. On the contrary, the present inventors remarkably use the shafts having spiral guideways, which are mutually opposite directions, for reciprocating the cutting blades in the width direction of the sheet material. Noise is generated, and when assembled in an OA mechanism such as a facsimile, a new problem is encountered, which is inappropriate for a sheet cutting device requiring quietness. Further, the sheet material discharging structure used in the conventional roll-type sheet cutting device has a problem that the cut surface of the sheet material is broken in order to forcibly discharge the cut end of the sheet material in an unreasonable form.

1 is an assembly conceptual view of a sheet cutting device according to an embodiment of the present invention.

2 is a front view of a sheet cutting device according to an embodiment of the present invention.

3 is an explanatory diagram showing a first form of an endless guide route according to the present invention;

4 is an explanatory view showing a groove cross section formed in the guide path of the shaft according to the present invention.

5 is an explanatory diagram showing a first form of a guide path in which the return direction pitch of the shaft according to the present invention is made larger than the forward direction pitch.

6 is an explanatory diagram showing one embodiment of an engaging member according to the present invention.

7 is an exploded view of the guide member viewed in cross section along the line A-A in FIG.

8 is an assembly view of the guide member viewed in cross section along the line A-A of FIG.

FIG. 9 is a cross-sectional view taken along a spiral guideway of the section B-B in FIG. 8; FIG.

10 is a perspective view showing in detail a moving body having a forced discharge portion of the sheet cutting device according to the present invention.

11 is a front view of a moving body having a forced discharge portion according to the present invention.

12 is a cross-sectional view taken along the line C-C in FIG.

13 is a cross-sectional view taken along the line D-D of FIG.

14 is an explanatory view showing a curved shape of the guide surface of the forced discharge portion according to the present invention.

15 is an explanatory diagram showing a cutting situation of a roll sheet material according to the present invention.

16 is a schematic view showing a cut surface of a sheet material according to the present invention.

* Explanation of symbols for main parts of the drawings

1: shaft 2: guide

3: hollowness (guide rail) 3a: single plate

4: mobile body 5a: first disc blade

5b: 2nd disc blade 6a: 1st disc shaft

6b: 2nd disc shaft 7: elastic roller (rotating means)

7a: elastic body 8: compression coil spring

9: 1st disc shaft storage part 10: 2nd disc shaft storage part

11: shaft storage part 12: side plate

13 gear 14 motor (drive means)

15: pinion gear 16: screw

17: switch for standby position detection 18: forward detection switch

19: engaging member 20: guide member

20a: fork 20b: disc (bottle)

20c: protrusion 21: leaf spring (additional means)

21a: main part 22: cutting point (intersection)

23: cutting edge 24: separation end

25: cutting surface 31: upper edge

32: Hanal 33: forced discharge

33a: first guide surface 33b: second guide surface

33c: third guide surface 41: drive shaft hole

42: sliding part 43: guide body insertion hole

44: large diameter 45: slit

201: cutting bow face 301: sheet face

S: Sheet Material

Accordingly, the present invention has been made to solve the above problems, it is easy to reciprocate operation in the width direction of the sheet material of the cutting blade, has a quietness enough to be assembled and used in the OA machine, and the cutting surface is cut into a wave It is an object of the present invention to provide an excellent sheet material cutting device with a quietness that can be prevented from being stable.

The present inventors have studied noise and found that there is an intersection point of the spiral shown as 2e in FIG. 3, which forms a spiral guideway in the mutually opposite direction control in the shaft outer diameter, but the presence of this intersection rotates the shaft. When moving the moving object, the OA mechanism also became a problem and found one of the causes of annoying metallic noise. Therefore, the inventors have found that it is better to form a fastening member fitted to the spiral guideway with synthetic resin by noting that replacing the metal body with synthetic resin can prevent such annoying metallic sound. It became.

In order to achieve the above object, the sheet cutting device of the present invention is a sheet cutting device for cutting a sheet material by moving a cutting blade in a forward direction and a return direction, the shaft having a spiral guide path in an outer diameter, and the spiral A moving body provided with a fastening member engaged with the guide path, a cutting blade supported by the moving body, a driving means for rotating the shaft body, etc., wherein the spiral guide path has a forward direction to form a forward path in the forward direction; It consists of a spiral and a spiral in a return direction forming a guide path in the return direction, and the spiral in the long forward direction and the spiral in the return direction have mutually reversed control and a spiral in the forward direction. A spiral guide path that is continuous between the spiral in the return direction and at least one end is formed by resin molding, and the engaging member is formed by resin molding, and is rotated to the movable body. It is characterized in that it is possibly supported.

That is, in the sheet cutting device of the present invention, since the engaging member rotatably supported by the spiral guide path of the shaft body rotated by the driving means and the movable body engaged therewith is formed by resin molding, When moving and cutting the supported moving object, the metal moving body and the metal engaging portion are engaged with each other, so that the sound generated by the metal sound is less than that of moving the moving object.

Furthermore, the molding of the spiral guideway with resin has the advantage that the molding of the spiral guideway is easy, the cost is reduced, and the wear is reduced without special lubrication. At this time, according to the spiral groove having a cross section of which the upper part of the spiral guideway is widened, a continuous guide groove is formed at the bottom of the intersection to smoothly guide the engaging member, further improving quietness, and resin molding. Separation of mold is easy and cost reduction is possible.

In addition, since the helical guideway is formed of a spiral in the forward direction and a spiral in the return direction, at least one end of the spiral is continuously formed, so that the direction in the forward and return directions can be changed without rotating the rotation driving means in reverse. . Furthermore, the formation of the guide path without the end by the spiral in the forward direction and the spiral in the return direction by both ends continuously enables the forward / reverse direction movement without reversing the rotation drive means, thus simplifying the quietness and the simplification of the mechanism. Is preferred.

That is, the spirals in the forward / return direction form a guide path continuously without end in one direction end or both ends, so that the rotational movement of the shaft is converted into the linear motion of the moving body by the spiral guide path, and the blade is moved in the forward direction. When moving from the starting point to the end point and changing the direction of the helical side in the return direction to the end point, the movable body moves from the forward to the return direction so that the continuous direction of the forward direction and the return direction of the movable body does not change the direction of the rotation driving means. Switching is possible.

In this way, it is possible to move the cutting foot in the forward direction and the return direction only by rotating the spiral shaft in one direction, so that the collision sound generated when the movable body collides with the components such as the stopper by inertia as the end of the forward / return transition is prevented. It is possible to provide a cutting device which is quiet and quiet and does not require a switching mechanism in the forward / return direction of the drive means.

Further, if the helical pitch in the return direction is increased with respect to the pitch in the forward direction of the shaft, the speed in the return direction can be increased without changing the rotation speed of the shaft, and the cutting blade can be returned to the standby position quickly. This configuration is particularly effective in the case where cutting is not performed and the load of the return is not small.

In addition, the guide member which covers the 1/3 or more of the column circumference which formed the guide path which is longer than the width | variety of this guide path which slides to the helical guide path of the said shaft body, and transmits the driving force of the reciprocating movement of the said moving body to the engaging member of the said moving agent. It is desirable to have a guide having a contact surface. That is, since the spiral guideway of the shaft of the present invention is formed so that the spirals in the forward direction and the return direction have a mutually twisted control, there exists an intersection of the forward / return spirals shown in FIG. For this reason, when the moving body supporting the cutting blade passes through this intersection, the engagement part shakes, collides with the angular part of the intersection to generate noise, and when the load is large, the engagement part may leave the normal guideway. .

On the other hand, according to the present invention, if the engaging member is provided with the guide portion of the above configuration, the vibration of the engaging portion is reduced, noise is prevented at the intersection portion, and the derailment of the engaging member can be prevented to allow stable movement.

In addition, since the guide portion becomes difficult to change the direction of the end of the reciprocating direction having a contact surface exceeding the semicircle of the shaft, for smooth reciprocating movement and quietness, a guide that covers 1/3 or more of the circumference less than the semicircle of the guide portion and the spiral for smooth reciprocating movement and quietness. It is preferable to have a contact surface.

Furthermore, the engaging member of the movable body includes a fork-shaped guide member having two fork parts engaged with the helical guide path and sliding, a bottle part etc. which is freely axially supported on the movable body, and the guide member is a spiral guide. It is preferable to have an attachment means pushed on to prevent further derailment of the engaging member by the intersection of the forward / return. In this configuration, when the movable body changes direction at both ends of the spiral guide path, the fork part engaged with the spiral guide path rotates the bottle part by the shaft and follows the guide path, thereby changing the direction of reciprocation at the end portion. This is done smoothly, and furthermore, since the guide member moves in the form of being in close contact with the spiral guide path by the attachment end, the guide member is faithfully moved along the guide path and derailed to prevent the occurrence of joints.

In addition, the drive means for rotating the festival is constituted by a drive motor and a spur gear that rotates the drive motor to the shaft, so that the gears smoothly contact each other and are generated from the gear rather than the inclined gear. It is desirable for further quieting because it reduces noise. The screw angle of the spur gear is preferably 10 degrees to 30 degrees in consideration of axial support and quietness.

The sheet cutting device of the present invention is a guide rail having a hollow cross section extending in a forward / return direction, the festival disposed in the hollow cross section of the guide rail, and the guide rail being fitted to the spiral guide path of the shaft. It characterized in that it comprises a movable body and the like installed a sliding portion to slide the inner surface of the hollow cross section. If the shaft is disposed and installed in the guide rail of the hollow end face in this state, the exposed portion of the rotating part is less, which is safe and advantageous for miniaturization. In addition, since the sliding part of the movable body moves by driving the inner surface of the guide rail, the upper surface of the guide rail can be used as the mounting surface of the corrugated cutting sheet, and the corrugated cutting sheet can be cut only by using the upper surface of the guide rail. It is easy to have a preset structure.

In addition, a cone having the first guide surface guided by pressing the cut end of the sheet material cut behind the cutting movement direction of the movable body in a downward direction from the cut point and near the cut point for guiding the cutting end to be rounded. It is preferable to provide a forced discharge portion having a second guide surface for forming a curved surface or a cone-shaped curved surface, and a third guide surface for guiding the rounded cutting edge to be placed on the lower flow side of the sheet material.

Although this structure is not limited to the form of the sheet | seat material to cut | disconnect, it is preferable that especially a cutting edge bends gently to the downward direction by winding of a sheet | seat material. For example, a roll sheet material such as a thermal sheet used in a facsimile or the like has a winding direction, in which case the cut edges of the discarded sheet material are discharged downward by the first guide surface and as shown in FIG. It is guided downward by the conical curved surface or the conical muscle curved surface of the second guide surface that is gently bent by the winding of the roll sheet material, and further guided to the third guide surface and placed in the downward flow, whereby the cut sheet material It is possible to prevent the generation of discontinuous cutting sound due to the breakage without breaking the sheet material falling from the cutting point, thereby increasing the quietness and stable cutting.

Furthermore, in order to discharge the paper sheet by winding the sheet material while cutting the roll sheet material, the first guide surface of the forced discharge part may have a plane having an angle of 5 to 20 degrees downward from the cutting point of the movable body with respect to the sheet surface. And the second guide surface has no conical curved surface or conical curved surface having a wide cone angle of 10 degrees to 40 degrees in the rear of the cutting motion with the vertex near the cutting point, and the third guide surface is near the cutting point with respect to the cutting line. There is no plane forming an angle of 5 degrees to 15 degrees on the lower flow side of the sheet material, and the first guide surface, the second guide surface and the third guide surface are continuously connected to form a forced discharge portion for guiding the cutting edge of the sheet material. It is desirable to be.

It is a good idea that the curved surface of the cone is not a mathematically defined conical surface, but a curved surface formed by a conical surface that is provided in a process. In addition, these three guide surfaces are the minimum surface which is required and what provided more than this guide surface is naturally included in this invention.

The sheet cutting device of the present invention is a sheet cutting device for cutting a sheet material by slidingly contacting the blade edge of a fixed foot having a substantially straight blade edge with the movable disc blade rotatably supported by the moving body, or the rotation of the moving object. The present invention is also applicable to a sheet material cutting device for cutting a sheet material by slidingly contacting the edges of the first disc blade and the second disc blade freely supported by the shaft. In this sheet material cutting device, when the moving agent moves in the cutting direction of the forward or return direction, the edge of the sheet material feeds the sheet material in either or both of the movable disk blade or the first disk blade and the second disk blade. It is preferred to have a rotating means to make a beautiful cut.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 is an assembly conceptual view of a sheet cutting device according to an embodiment of the present invention, FIG. 2 is a front view of a sheet cutting device according to an embodiment of the present invention, and FIG. 3 is a first view of an endless guide road according to the present invention. 4 is an explanatory diagram showing a groove cross section formed in the guide passage of the shaft according to the present invention, and FIG. 5 is a guide passage in which the return direction pitch of the shaft according to the present invention is larger than the forward direction pitch. Explanatory drawing which shows 1st form, FIG. 6 is explanatory drawing which shows 1 form of the fastening member which concerns on this invention, FIG. 7 is an exploded view of the guide member seen by AA line cross section of FIG. Fig. 1 is an assembly view of the guide member seen along the line AA of Fig. 9, and Fig. 9 is a cross sectional view taken along the spiral guide path of the end surface BB of Fig. 8;

In this figure, the movable body 4 is fixed by a screw 16 for attaching the first disk shaft storage part 9 and the second disk shaft storage part 10 to the first disk shaft 6a and the first disk shaft axle. Both ends of each of the two disc shafts 6b are rotatably supported by a blade shaft storage unit provided in the movable body 4, the first disc shaft storage unit 9 and the second disc shaft storage unit 10. have. The first disk blade 6a and the second disk blade 6b are arranged and fixed so as to intersect with the first disk blade 5a and the second disk blade 5b, respectively. The first disc 5a is in close contact with the second disc 5b by the compression coil spring 8 so that the blade tip is fixed. The elastic roller 7 fixed to the first disc shaft 6a is rotated by the movement of the movable body 4 in contact with the upper surface of the hollowness 3 of FIG. 1, and on the first disc 5a. It is intended to impart rotational force.

As another embodiment, FIG. 13 shows that the elastic rollers 7 are fixed to both the upper and lower first disk blades 5a and the second disk disks 5b, and the elastic body 7a is inserted into the outer circumference. The elastic roller 7 is fixed to the upper and lower first disk blades 5a and the second disk disk 5b, and when the movable body 4 travels, the elastic body 7a comes into contact with and rotates on the upper and lower surfaces of the guide rail 2. The first disc 5a and the second disc 5b are rotated in the direction in which the blade tip is cut by the non-cut sheet material.

The perturbation part 41 of the moving body 4 constitutes the guide rail so that the perturbation of the moving body 4 can be caused by perturbing the inner surface of the U-shaped cross-section of the U-shaped hollowness 3. ) Is provided with a drive shaft hole 41 penetrating in the axial direction of the shaft body 1, and the shaft body 1 is inserted into and through the drive shaft hole 41.

In addition, as shown in FIG. 2, a standby position detection switch 17 for detecting the return of the movable body 4 to the standby position at the right end is mounted on the side plate 12. As shown in FIG.

The shaft 1 is enclosed in the cross section of the hollowness 3 so that both shafts are rotatable via the shaft storage portion 11 with the side plate 12 opposite to the end plate 3a of the hollowness 3. It is supported, and the outer diameter of the shaft 1 is formed with a spiral groove guide path (hereinafter referred to as a guide roll) by a resin molding method.

This guide path 2 is formed in the outer diameter part of the shaft 1 by resin molding integrally with the shaft 1 or separately from the shaft 1. In this manner, the resin molding of the guide path and the coupling member to be described later reduces the occurrence of noise during operation, and a quiet moving mechanism is obtained. As shown in FIG. 3, the guide path 2 of the shaft 1 has a relationship in which spirals in the forward / return directions are opposite to each other, and spirals in the forward direction and spirals in the return direction are forward / It consists of a continuous curved groove at the start and end of the return, and forms an endless guideway.

As shown in FIG. 4, the groove cross section of the guide path 2 forms a cross section of a wide upper mold to improve mold releasability at the time of molding. In the figure, it becomes semi-circle of (a), V-shape of (b), and U-shape of (c), so that it is possible to select a good shape of mold releasability during molding.

It is shown in Fig. 5 that the guide path 2 may have the same pitch as the forward / return, and if the helical pitch in the return direction is larger than the forward direction, the load will not be reduced even if the return path is not cut. There is an advantage that the movement time of non-return can be shortened, and the cutting operation time can be shortened.

In addition, as shown in (d), (e), and (f) of FIG. 4, two or more parallel grooves are used as the forward / return guide paths, respectively, It is also possible to provide a coupling, which can reduce groove wear in the guideway.

Furthermore, in the present embodiment, the guide path is a spiral groove. However, the present invention may be a spiral of a projection rather than a groove of a groove, and if the projection is a spiral, a railroad track is formed at the intersection of the forward / return spirals. It is necessary to prevent the interference between the coupling part and the spiral provided with a gap in the spiral as in the form of the intersection part of.

The perturbation portion 41 of the movable body 4 which perturbs the inner surface of the guide rail 3 is provided with a coupling member which is coupled to the guide path 2 of the shaft 1, but this coupling member is shown in FIG. 6. As described above, the guide member 20 having a contact surface longer than the groove width of the guide path 2 is inserted into the guide path 2.

This guide member 20 is required to cover more than 1/3 of the circumference of the shaft circumference with a spiral groove to prevent the derailment phenomenon that is caught at the intersection of the spiral forward / return of the guide path (2), In the embodiment, a coupling member having the following structure is employed to ensure reliable operation.

Hereinafter, the coupling member of this embodiment is explained in full detail.

FIG. 7 is an exploded view of the coupling member, showing the II line cross section of the perturbation part 41 of FIG. 1, and FIG. 8 is an exploded view of the II line cross section of the perturbation part 41 of FIG. FIG. 9 is a cross-sectional view taken along line II-II of FIG. 8 connected to the spiral groove of the guide path 2.

Coupling member 19 is composed of a guide member 20 and the leaf spring 21 for pressing it, the guide member 20 is a fork portion having two pairs of forks, as shown in Figure 7 and 8 20a and a disc portion 20b constituting the receiving portion of the fork are formed by a resin molding method.

The two pairs of fork portions 20a form recesses that engage with the spiral grooves of the guide path 2, and span the helical grooves of the guide path 2 so that the tip ends up to the shaft circumference. .

The guide member 20 is inserted into the guide member insertion hole 43 provided to be orthogonal to the perturbation portion 41 and the drive shaft hole 42 of the movable body 4, and the bottom surface of the disc portion 20b is enlarged diameter portion 44. It is supported to rotate in contact with it.

Therefore, the recessed portion of the fork portion 20a is inserted into the helical groove of the guide path 2 of the shaft body 1 inserted into the drive shaft hole 42 so as to support the diameter of the groove bottom portion.

As the guide member 20 is molded by the resin molding method, it is possible to obtain a quiet moving mechanism in which the generated noise is reduced as described above.

The leaf spring 21 has an elongated plate shape, and both end portions of the elongated plate are inserted into the slit 45 penetrated perpendicularly to the enlarged diameter portion 44, and the disc portion 20b head of the guide member 20 is located at the center thereof. By pressing the portion, the guide member 20 is pressed against the guide path 2 of the shaft 1.

A recessed portion 21a is provided at the center portion of the leaf spring 21, and a projection 20c provided at the center of the disc portion 20b of the guide member 20 contacts the recessed portion 21a to lightly rotate the guide member 20. In addition to the pressing so as to prevent the deviation of the leaf spring (21).

In the above configuration, when the shaft 1 rotates, the fork portion 20a of the guide body 20 perturbates in the spiral groove of the guide path 2, and when the shaft 1 comes to the end of the guide path 2, the guide body (20) is rotated halfway to the guideway (2) of the endless smooth movement of the moving body from the forward to the return.

In addition, the fork portion 20a is pushed so that it can be easily rotated from the leaf spring 21 through the guide path 2, but it is not derailed at the forward / return intersection point of the guide path 2 and noise is also reduced. .

The gear 13 is fixed to the side plate 12 side end of the shaft 1, and the gear 13 forms a driving force with the pinion gear 15 of the motor 14 to transmit driving force to the shaft 1. do.

The gear 13 and the pinion gear 15 are made of a helical gear having a torsion angle 15 which is controlled by resin molding, and the torsion angle of the helical gear is 10 to 10 degrees from the point of noise and axial thrust force. 30 degrees is preferable, and the helical gear has less noise than the straight gear, but the noise is reduced with the resin of the shaft and the coupling member, and the cutting device can be a quiet cutting device.

Hereinafter, the operation of the sheet cutting device according to the present invention with reference to the accompanying drawings.

First, as shown in FIG. 2, the motor 14 is rotated while the movable body 4 is at the right end standby position, and the shaft 1 rotates via the pinion gear 15 and the gear 13. The force in the forward direction is applied to the fork portion 20a of the guide member 20 coupled to the guide groove 2 of the shaft 1 of the spiral groove.

From this, the guide member 20 moves the moving body 4 in the forward direction while perturbing the guide path 2, in which the first disc blade 5a is rotationally driven from the elastic roller 7 and the circumferential edge thereof. The first sheet disk 5a and the second disk sheet 5b which move in the cutting direction while rotating the cut sheet material in the cutting direction and rotate the sheet material placed on the upper surface of the hollowness 3 as shown in the drawing. Cut between.

As shown in FIG. 2, when the moving member 4 reaches the end in the forward direction at the right end, the cutting of the sheet is terminated. When the cutting of the sheet is finished and the rotation of the shaft 1 is stopped again, the guide member 20 is guided. According to the curvature change of (2), it changes from the spiral in the forward direction to the spiral in the return direction at the end of the forward direction.

Specifically, as shown in FIG. 3, the guide member 20, which is moved in the direction of arrow a, moves in the direction of arrow b at the end, and then turns to arrow c, and then rotates again. To the return direction of the arrow d.

From this, the guide member 20 moves the movable body 4 to which the force of the return direction is applied in a return direction this time, and the movable body 4 which reached | attained the end of the return direction spiral is the guide member 20 mentioned above. Is the same as when the end of the forward direction is reached, and is changed from the spiral in the return direction to the spiral in the forward direction.

Subsequently, while the moving body 4 changes direction at the end portion, the guide member 20 supports the bottle 20b to pivot to the perturbation part 41 of the moving body 4, and then turns the spiral. Along the guideway of the fork portion 20a is free to rotate, but smoothly rotates in the guideway.

As shown in FIG. 2, when the movable body moves back to reach the standby position on the left side, the driving force is interrupted by the standby position detection switch 17 which detects the standby position, and the movable body 4 is stopped at the standby position. Ending one cycle of cutting.

In the cutting operation, the sheet cutting device according to the present invention in which the shaft body or the like is made of resin can significantly reduce the generation of noise as compared with the conventional device, as well as the effect of the helical gear of the drive system. The results are shown below.

[Example of noise measurement]

[Measuring conditions]

Festival size: Shaft diameter φ6㎜, spiral pitch 7㎜

Shaft Speed: 5000 rpm

Material of shaft and coupling member: Invention material: Polyester resin molded article

Comparative material: pure aluminum base products

Driving agent: In case of using straight gear and inclined gear

Noise measurement method: Based on JIS 28731, noise during no load operation by acoustic material was measured at 1m away from sheet cutting equipment.

Result of measurement: Comparative material-pure aluminum shaft, straight gear 67 dB

The present invention-polyacetal resin shaft, straight gear 61 dB

Polyacetal Resin Festival, inclined gear 58 dB

As shown in the above results, the noise during operation of the resin shaft of the present invention is 6 dB lower than that of the conventional metal shaft of the comparative material, and the noise reduction is 9 dB when compared with the comparative material using the inclined gear. This is possible.

As described above, according to the sheet cutting device according to the embodiment of the present invention, one cycle reciprocating movement of the cutting blade in the forward and return directions until the cutting blade starts cutting the sheet from the standby position and returns to the standby position after cutting. It is possible to simply rotate this shaft in one direction. Therefore, the control circuit for inverting the shaft 1 or the limit switch at the end is not required for the reciprocation of the moving body, thereby simplifying the device and lowering the manufacturing cost. In addition, since the spiral guideways are inverted continuously, there is no noise due to the collision of the moving object at the forward end or the return end, thereby providing excellent quietness. In addition, even if the direction of rotation of the drive source is wrong as an additional action, it is possible to operate in the forward direction and the return direction, it is possible to prevent the accident of heating the motor even if the polarity of the motor is incorrect.

On the other hand, if the spiral of the guide path is made larger in the return path than the pitch of the forward path, the movement time to the return path with less load can be shortened when the cutting path is not cut, and the operation stroke time of the cutting path can be shortened. There is an advantage that can be shortened.

In addition, by providing two or more guideways arranged in the grooves, two or more engaging portions for controlling the grooves in the movable body can reduce groove wear in the guideways. Further, the spiral guideway and the engaging member of the festival are made of resin, and the noise can be reduced by 10% or more by using the inclined gear for the driving agent.

Furthermore, the spiral guideway is molded by resin molding, so mass production is possible at a low price. When the guideway is formed into a groove shape having a wide cross section at the top, the mold separation at the time of resin molding is improved, and the bottom of the intersection point is improved. A continuous guide groove is formed in the quietness is achieved.

In addition, since the guide member of the engaging member engaged with the helical guide path is smoothly followed over the circumference of the guide path of the protrusion, there is no fear of derailing at the intersection of the forward / return movement of the moving body. . In addition, because the guide member is freely supported on the moving body, the rotation is smoothly rotated along the guide path even when the direction of the moving body of the shaft end is changed, thereby achieving stable reciprocating movement.

In addition, the sheet cutting device according to an embodiment of the present invention is to arrange the festival in the interior of the hollow support of the guide rail extending in the forward direction, the spiral guide of the shaft to the sliding portion of the moving agent sliding the interior of the hollow support It is advantageous for safe miniaturization without exposing the rotating part by moving the moving body by cutting the engaging part to be fitted to the cutting part, and cutting even if the cutting sheet is placed on the upper surface of the guide rail without the guide member on the upper part of the guide rail. This makes it possible to achieve a preset structure.

In the above embodiment, the apparatus for cutting the sheet in the forward path has been described, but the sheet material cutting device according to the present invention can cut the sheet material even in the return path, in this case as shown in FIG. As the forward path end detection switch 18 is provided on the end plate 3A as described above, the forward path end of the movable body 4 can be detected and cut by the driving force of the motor 14.

Next, the sheet | seat material cutting apparatus which provided the forced discharge part to the moving body of this invention is demonstrated.

FIG. 10 is a perspective view showing in detail a moving body of a sheet material cutting device provided with a forced discharge part of the present invention. FIG. 11 is a front view of the moving body, FIG. 12 is a sectional view taken along line CC of FIG. 11, and FIG. 13 is a DD line of FIG. Sectional drawing and FIG. 14 are figures explaining the guide surface curved shape of a forced discharge part.

In the drawings, the movable body 4 corresponds to the movable body 4 shown in FIG. In detail, the movable body 4 is composed of an upper blade 31 bearing the first disk blade 5a and a lower blade 32 bearing the second disk blade 5b, between the blades. A gap 4a through which the sheet to be cut is passed is formed and connected integrally by the connecting portion 31a at the end. The sliding part 41 integral with the lower blade 32 slides the inside of the hollow bar 3 to reciprocate the moving body 4.

The lower blade 32 is provided with a forced discharge portion 33 at the rear of the intersection of the first disk 5a and the second disk 5b, which are cutting points, and the forced discharge 33 The first guide surface 33a for guiding the cutting blade of the cut sheet material downward from the cutting point, the second guide surface 33a for guiding the cutting blade roundly, and the rounded cutting blade in the downstream side. The third guide surface 33c is guided as if sent.

14 is a view for explaining the cross-sectional shape of the guide surface of the forced discharge port, as shown in the sheet surface (3, the upper surface of the hollow table 3) and the plane of the cutting line XX in the cutting direction perpendicular to the 201) is simulated and the angle of the said guide surface with respect to a back surface is shown.

As shown in FIG. 14, the first guide surface 33a is downward toward the rear of the cutting direction from the vicinity 22 'of the cutting point 22 with respect to the surface of the seat surface 301. The second guide surface 33b is a first guide surface having a wide conical angle α = 20 ° or a conical curved surface having a wider rearward angle α = 20 ° as a vertex. 33a) is smoothly continuous with the cone surface.

The third guide surface 33c is a conical surface of the second guide surface 33b in a plane at an angle γ = 7.5 ° from the vicinity of the cutting point 22 'with respect to the surface 201 perpendicular to the cutting line XX. And seamlessly in succession. By the guide surface, the forced discharge portion 33 forms a continuous surface of a plane and a curved surface indicated by e-f-g-h in the drawing, and is discharged while rounding the cutting edge by this surface. The curved surface g-h of the third guide surface 33c may be perpendicular to the seat surface. However, as shown in FIG. 14, when the surface g-h is slightly inclined to the outside, the sheet material is easily wound.

When the angle β of the first guide surface 33a is too large, the guide surface is excessively pressed by the cutting end and the tip is applied. On the contrary, the guide surface is less effective when the guide surface 33a is too small. In addition, if the cone angle α of the second guide surface 33b is too small, a wave surface passing through the cutting surface is generated, and if it is set too large, the effect of rounding the cutting edge is reduced. If the angle γ of the third guide surface 33 is too small, the cutting end does not fall far from the cutting point, and the sheet material is caught by the rotary blade that reciprocates. If too large, the wavefront occurs on the paper end surface. . Therefore, these angles are strictly changed by the material or thickness of the sheet member, but usually the angle of the first guide surface 33a is 5 ° to 20 °, and the cone angle of the second guide surface 33b is 10 ° to 40 °. It is preferable to set the angle of the three guide surfaces 33c to 5 degrees-15 degrees. In addition, in order to facilitate the discharge of the sheet material, the lower side surface 32c of the lower blade 32 is cut off, and the front end of the gap 4a between the upper blade 31 and the lower blade 32 (end 31b in the sheet material shear direction). , 32b) is enlarged to guide the sheet member, and a protruding protrusion 31c is installed at the rear end of the upper blade 31 so that the sheet member is not caught when the movable body 4 retreats and returns to the standby position.

Hereinafter, the operation of the sheet material cutting device provided with the forced discharge part of the above configuration will be described based on the drawings. FIG. 15 is a view for explaining the cutting mode in the case of cutting the sheet material. As shown in the drawing, when the sheet material 5 is cut along the arrow X, the cutting end 23 is the first disc 5a. ) Is spaced apart downward from the intersecting cutting point 22 of the second disc 5b and cut into a shape that has been hysterized thereunder. In order to prevent the cutting end 23 from interfering with the moving body 4, the cutting end 23 needs to be separated as far as possible from the cutting spaced end 24 of the sheet material leaving the cutting end 23. Although the cutting end 23 is installed in the shape of being forced out as if it is forcibly enlarged, this various forced discharging structure is a case where the wave shape is not good at the tip 25 of the sheet member as shown in FIG. Occurs.

On the other hand, since many of the sheet material cutting devices are used for cutting the roll sheet material wound on the roll, the remnant of the wound is often left in the sheet material being drawn out, for example, as shown in FIG. Likewise, when the sheet member S wound on the roll of radius γ is taken out and cut along the arrow X line, the sheet member S wound around the roll R having a radius R larger than the radius γ is wound. Since the remnant remains, the trajectory of the cutting end 23 is cut and separated by drawing the bottom circumference of the cone with the cutting point 22 as the vertex.

In the sheet material cutting device of the present invention, the cutting edge 23 is guided along this conical surface in consideration of the advantages, thereby separating the cutting edge 23 from the end 24 separated and cut unreasonably without interference. The sheet | seat material cutting apparatus which can cut | disconnect which a wave shape does not generate | occur | produce in the cross section of a sheet | seat material can be provided.

Hereinafter, the operation of the forced discharge of the present invention will be described.

When the shaft 1 is rotated, the movable body 4 moves along the guide rail 2 in the cutting direction of the arrow X-ray so that the elastic rolls 14 and 15 move to the first disc 5a and the second disc 5b. ), And the edge of this blade moves while rotating as if attracting the sheet material to cut the sheet material. In the sheet material cut in this manner, since the first guide surface 33a is inclined in the rearward direction, the cutting end 23 is first pressed downward. Since the side of the conical surface of the second guide surface 33b which the cutting edge 23 is in contact with is then inclined backward only by the angle γ, the cutting edge falls to the outside, but at the same time, the second guide surface 33b faces the conical surface. As shown in Fig. 15, the cut end is guided to this left side surface and discharged without difficulty. In addition, the cutting end 23 is discharged while lying on the downstream side guided to the third guide surface (33c). Therefore, since there is no unreasonably widening of the cutting edge, such as a protruding portion of the conventional cutting device, the wave such as wrinkles does not occur in the cross section of the sheet material.

As described above, according to the sheet material cutting device provided with the forced discharge part of the present invention, the first guide surface 33a and the cutting end that guide the cutting edges of the sheet material cut on the discharge side of the sheet material of the moving agent in the downward direction are guided. Since the second guide surface 33b for guiding the circular discharge and the third guide surface 33c for guiding the circularly wound cutting edge are provided downstream, the cutting edge is cut when cutting the sheet material. Not only is guided along these guide surfaces and discharged without difficulty, but also stable cutting without wrinkles of this sheet material is possible without causing interference of the sheet material.

The angle β with respect to the seat surface of the first guide surface of the forced discharge part is 5 ° to 15 °, the cone angle γ of the second guide surface is 10 ° to 40 °, and the angle γ to the cutting line of the third guide surface. ) Is set to 5 ° to 20 ° to obtain a good effect.

As described above, the embodiment of the present invention has been described with respect to the rolled sheet material cutting device in which the first disc and the second disc are provided on the movable body, but one movable disc blade rotatably supported by the movable body 4. Of course, it is also applicable to the roll-type sheet material cutting device for cutting the sheet material by abutting the fixed blade fixed to the guide rail.

According to the sheet material cutting device of the present invention, since the direction of rotation of the rotary blade can be continuously changed in only one direction of the shaft body, the control blade for replacing and moving in the reciprocating direction, which is essential for the cutting device of the conventional sheet material, is unnecessary. By reducing the number of limit switches required to stop the movement of the parts, the number of parts can be reduced, which can simplify the sheet material cutting device and lower the manufacturing cost.

In addition, in the cutting direction, which is inevitable in the conventional cutting device, there is no collision sound due to the inertia of the moving agent, and when the reciprocating path is used as the endless guide, the occurrence of collision noise at both ends can be eliminated. In addition, since the sheet material cutting device of the present invention is made of resin for the festival and the engaging portion for moving the moving body, it is easy to form the spiral guideway and reduce the cost, and also the noise is lower than that of the conventional metal cutting device. Since the driving of the shaft is greatly reduced and the drive of the shaft is performed by the inclined gear, the driving sound of the gear is reduced, and the sheet material cutting device of the OA device, which requires low speed, is found to be an optimum device.

In addition, there is no risk of derailment at the forward / return intersection of the spiral because the fork guide member that is caught by the helical groove of the guideway and freely supported by the movable body is used as a fastening member for moving the moving body. Negative moving direction change is also performed smoothly, and stable reciprocation of cutting return is possible. In addition, by installing the rotating shaft inside the guide rail of the hollow shaft, the exposure of the rotating part is not caused, thereby improving the compactness and safety, and it is easy to manufacture the preset groove which can be cut even if the cut sheet is placed on the upper surface of the guide rail. .

Further, the sheet material cutting device of the present invention has a first guide surface which pressed the cutting end of the sheet material downward on the discharge side of the movable body, a second guide surface having a rounded cutting edge, and a third guide surface by placing it downwardly flowing toward the bottom. Since the discharge part is installed, the cut end is not excessive when cutting the rolled sheet material wound, and it is possible to be stably cut without interference and without breaking at the cutting point. As a result, since the breakage at the time of cutting increases the qualitativeness without intermittent sound, and the cutting edge of the disc moves and is cut while rotating in the direction of pushing the sheet material at the time of cutting by the rotating means provided on the disc. Cutting is smooth and clean.

Claims (13)

A sheet material cutting device for cutting a sheet material by moving a cutting blade in a forward direction and a return direction, the sheet material cutting device comprising: a shaft body having a spiral guide path in an outer diameter, and a moving body provided with a fastening member engaged with the spiral guide path; A cutting blade supported by the movable body, a drive means for rotating the shaft body, the spiral guide path spiral in a forward direction to form a guide path in a forward direction, and a spiral spiral in a return direction to form a guide path in a return direction And a spiral guideway in which the spiral in the forward direction and the spiral in the return direction are wound opposite to each other, and the spiral in the forward direction and the spiral in the return direction are at least one end continuous. Formed by resin molding, and the fastening member is formed by resin molding to be rotatably supported by the movable body. The cutting device. The sheet cutting device as claimed in claim 1, wherein the spiral in the forward direction, the spiral in the return direction, and the like form a guide path continuously at both ends without a step. The sheet cutting device as claimed in claim 1 or 2, wherein the pitch of the spiral in the return direction is larger than the pitch of the spiral in the forward direction. The sheet cutting device according to claim 1, wherein the spiral guide path is formed in a spiral groove having a wide cross section at a top thereof. The guide surface of claim 1, wherein the contact surface covers a circumference of 1/3 or more of the circumference of the shaft body, which is slid to the helical guide path of the shaft to form a guide path longer than the width of the guide passage for transmitting the driving force of the return movement of the movable body. Sheet material cutting device excellent in quietness, characterized in that the guide portion having. The fastening member of claim 1, wherein the engaging member of the movable body comprises a fork-shaped guide member having two fork parts engaged with the spiral guide path and slidingly moved, and a bottle part rotatably axially supported by the movable body; The sheet cutting device excellent in quietness, characterized in that it comprises an additional means for pushing the guide member to the spiral guideway. The sheet cutting device as claimed in claim 1, wherein the drive means for rotating the shaft is constituted by a drive motor and an inclined gear that transmits the rotation of the drive motor to the festival. 2. The hollow cross section of the guide rail according to claim 1, wherein the guide rail has a hollow cross section extending in the forward / return direction, the shaft body disposed in the hollow cross section of the guide rail, and the hollow cross section of the guide rail being engaged with the spiral guide path of the shaft. The sheet cutting device excellent in quietness, characterized in that it has a movable body provided with a sliding portion for sliding the inner surface of the slide. According to claim 1, wherein the first guide surface is guided to press the front end of the sheet material to be cut behind the cutting movement direction of the moving body in the downward direction from the cutting point, and near the cutting point for guiding to discharge the cutting end roundly It is excellent in quietness, characterized in that the steel discharge portion provided with a second guide surface for forming a conical curved surface or a cone curved surface, and a third guide surface for guiding the rounded cutting end to be placed on the side flowing in the lower direction of the sheet material. Sheet cutting device. 10. The method of claim 9, wherein the first guide surface of the forced discharge portion and the plane of the angle of 5 to 20 degrees downward with respect to the seat surface near the cutting point of the movable body, the second guide surface is a vertex near the cutting point The conical angle widening in the rearward direction of the cutting motion is 10 degrees to 40 degrees, and there is no conical curved surface or conical root surface, and the third guide surface is 5 degrees to 15 degrees downward in the conveying direction of the sheet material near the cutting point with respect to the cutting line. The sheet cutting device is excellent in quietness, characterized in that there is no plane forming the angle of Figure, the first guide surface, the second guide surface and the third guide surface is formed in succession to form a forced discharge portion for guiding the cutting end of the sheet material. 2. The sheet member according to claim 1, further comprising a movable disk blade or a fixed blade having a straight blade tip which is freely rotatably supported on the movable body, and the sheet material is cut by sliding contact between the front edge of the disk blade and the blade tip of the fixed blade. Excellent sheet material cutting device characterized in that the quietness. 2. The quietness according to claim 1, further comprising a first disc blade and a second disc blade rotatably supported by the movable body, wherein the sheet material is cut by sliding contact with the front edges of the two disc blades. Excellent sheet cutting device. The method according to claim 1, wherein when the movable body moves in the cutting direction of forward or return, either the movable disk blade, or the first disk blade and the second disk blade, or both directions, in a direction in which the sheet material pushes the sheet material. Sheet material cutting device excellent in quietness, characterized in that having a rotating means for rotating.