JPH0731990Y2 - Sheet-shaped member cutting device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sheet-shaped member cutting device.

(Prior Art) These continuous sheet-shaped members such as plain paper, light-sensitive, heat-sensitive, pressure-sensitive paper, electrostatic recording paper, tracing paper and the like, or electronic copying machines, facsimiles, printers, plotters, microfilms. A cutting device is used to accurately, beautifully, and quickly cut a large-sized or long sheet-shaped member fed from a reader printer, an offset plate making machine, a packaging machine, or the like.

Although various types of conventional cutting devices of this type are known, a so-called swing-type cutting device that cuts a sheet-like member by rotating a cutter along a guide member tends to become widespread. This cutting device uses, for example, a circle cutter as a cutter, and a first pulley for rotationally driving the cutter is coaxially and integrally attached to the circle cutter. On the other hand, a pair of second pulleys are arranged at both ends of the guide member, and an endless wire is bridged between the second pulleys. The motor is connected to one of the second pulleys,
The wire is periodically reciprocally driven by the periodic reversal drive of the motor. The middle part of the one-sided path of this wire is connected to the supporting case of the cutter, and the middle part of the other-sided path is wound around the first pulley. Therefore, when the support case is moved, the other side path of the wire moves relative to the support case to rotate the first pulley and the cutter, so that the sheet-shaped member is efficiently cut.

(Problems to be solved by the invention) In the conventional cutting device, a slight gap is formed between the support case of the cutter and the guide member in order to make the support case slide smoothly. Has some rattle, and when the cutter is pushed up by the cutting resistance of the sheet-shaped member, there is a disadvantage that the cutting depth becomes shallower by the above-mentioned gap.

Further, in the conventional cutting device, since the wire is simply wound around the first pulley, the frictional force with respect to the pulley is constant, and therefore the rotational force of the cutter is also constant. Therefore, when the sheet-shaped member is thick or hard, the wire slips on the peripheral surface of the pulley, while the cutter bites into the sheet-shaped member to reduce the rotation speed, which may reduce the cutting efficiency and the roughness of the cutting surface. is there.

(Purpose of the Invention) The present invention was devised to effectively solve the above-mentioned problems, and the purpose thereof is to make a constant cut without causing the cutter to rise even when the cutting resistance of the sheet-shaped member is large. An object of the present invention is to provide a cutting device capable of ensuring a depth and capable of excellent cutting.

(Structure of the Invention) In order to achieve the above object, the present invention provides a cutter between the guide walls of a guide member formed by first and second guide walls that are substantially parallel to each other along the longitudinal direction. The cutter supporting member is slidably arranged with the cutting edge of the cutter protruding outward from the first guide wall side, and
A cord-like body which is arranged along the longitudinal direction of the guide member and is driven to reciprocate is connected to the cutter support member, and the cutter support member is provided with the first member on one side thereof facing the first guide wall. A first roller guided by a guide wall is rotatably provided integrally with the cutter, and a pair of guide rollers is guided by the second guide wall on the opposite side to the second guide wall. Second rollers are arranged on both sides of the first roller in the longitudinal direction of the guide member so as to come into contact with the first roller.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a cutting device 1 according to the present invention. A sheet-shaped member 2 to be cut is a flat blade 5 which also serves as a lower edge 4 of a guide member 3 of the cutting device 1 and a sheet retainer. It is continuously fed out from the other side of the drawing to the front side through a gap between and, and is cut at predetermined intervals by the reciprocating movement of the cutter supporting member 6 in the left-right direction in FIG. At this time, if the sheet-shaped member 2 is thicker or harder than usual and its cutting resistance increases, the torque required to rotate the circle cutter 11 as a cutter increases. However, since the pulling force of the wire 7 as the cord-like body connected to the cutter supporting member 6 also increases, the pulling force causes the cutter supporting member 6 to move to the third position.
As shown in the figure, the second roller 8 on the rear side slightly tilts forward in the moving direction, contacts the second guide wall 3b of the guide member 3, and the reaction force of the second roller 8 makes the first roller 10 stronger than the first guide wall 3a. Abut. As a result, the frictional force between the first roller 10 and the first guide wall 3a increases, the first roller 10 and the circle cutter 11 are rotated with a stronger torque, and the sheet member 2 is cut well. Hereinafter, the present invention will be described in more detail.

The guide member 3 has a substantially rectangular hollow cross-sectional shape as shown in FIG. 2, and the guide member 3 has a lower side forming a first guide wall 3a and an upper side forming a second guide wall 3b. There is. The first and second guide walls 3a and 3b are connected by a rear wall 3c, and a front wall 3d hangs from the front end of the second guide wall 3b. A predetermined gap is formed between the front edge of the first guide wall 3a and the lower edge of the front wall 3d, and the outer peripheral blade portion 11a of the circle cutter 11 is located below the front edge of the first guide wall 3a. Over a predetermined length. In addition, the sheet-shaped member 2 is provided along the lower side of the first guide wall 3a.
The flat blade 5 also serving as a presser is provided, and the blade portion 11a of the circle cutter 11 is superposed on the tip of the flat blade 5 with a predetermined width. And the sheet-like member 2 includes the first guide wall 3a and the flat blade 5.
It is designed to be fed through the gap between and.

In the groove 12 inside the guide member 3, the cutter support member 6 is formed in the groove 12
It is arranged so as to be movable along. The cutter support member 6 is a mounting plate portion 6a which is substantially parallel to the rear wall 3c of the guide member 3.
And a pair of bracket portions 6b which are bent at right angles in the front wall 3d direction at both ends thereof, and a first roller 10 as a first guided portion and an integral body with the first roller 10 are provided in the lower center of the mounting plate portion 6a. A shaft 13 that coaxially and rotatably supports the combined circle cutter 11 is fixed, and shafts 14 and 15 of second rollers 8 and 9 as second guided parts are provided at both upper ends of the mounting plate 6a. Is fixed. And the first roller 10 is the first guide wall 3a.
Is guided by the upper surface of the second roller 8 and the second roller 8 and the second guide wall 3b.
It is designed to be guided by the bottom surface of the. The above axis
Oilless bearings are attached to 13-15.

A pair of pulleys 18 and 19, rubber stoppers 20 and 21, and limit switches 25 and 26 are arranged at both ends of the guide member 3, and one pulley 18 is connected to a drive shaft of a motor 22 via a pinion. . The wire 7 is bridged between the pair of pulleys 18 and 19, and the ends 7a and 7b of the lower path of the wire 7 are connected to the spring 2
It is attached to the bracket portion 6b of the cutter support member 6 via 3, 24, respectively. The springs 23 and 24 are for applying a predetermined tension to the wire 7 to secure the frictional force with the pulleys 18 and 19.

The cutting device 1 for the sheet-shaped member 2 is configured as described above, and by repeatedly driving the motor 22 in reverse at a constant cycle,
The cutter support member 6 reciprocates along the guide member 3 in the left-right direction in FIG. Switching the rotation direction of the motor 22
The cutter support member 6 is provided with stoppers 20 and 21 at the end of the guide member 3.
This is done by the limit switches 25 and 26 that detect the arrival of the motor and the control circuit of the motor 22 to which the signals from the switches are input. When the cutter support member 6 moves, the first
Since the roller 10 makes contact with the first guide wall 3a and rolls, the circle cutter 11 also rotates integrally. Therefore, the peripheral speed v ₁ of the blade portion 11a and the moving speed v ₂ of the cutter support member 6 due to this rotation are The blade portion 11a cuts into the sheet-shaped member at the added large speed v ₁ + v ₂ , and the cutting efficiency is improved.

Since the bracket portion 6b, to which the ends 7a and 7b of the wire 7 are connected, projects toward the front side of the cutter support member 6, when the wire 7 is pulled, the front end portion of the cutter support member 6 in the traveling direction is guided. A couple acts toward the rear wall 3c side, and this couple causes the cutting side of the blade portion 11a of the circle cutter 11 to incline at a predetermined angle with respect to the flat blade 5, which is important for good cutting. A so-called toe-in angle, which is an element, is automatically formed. Since this toe-in angle is automatically adjusted to be reversed when the moving direction of the cutter supporting member 6 is reversed, the cutting is equally good in both moving directions.

A spring for pressing the circle cutter 11 against the flat blade 5 may be provided as necessary to obtain a predetermined blade pressure of the circle cutter 11 against the flat blade 5.

Next, when the cutting resistance of the sheet-shaped member 2 increases to some extent, the torque required to rotate the circle cutter 11 and the first roller 10 increases, and at the same time, a force that pushes the circle cutter 11 upward is applied. However, since the pulling force of the wire 7 on the pulling side increases due to the increase in the cutting resistance, this force causes the cutter support member 6 to slightly tilt forward in the traveling direction, and the second roller 8 at the rear portion is indicated by a chain line in FIG. As shown, it lifts up and contacts the second guide wall 3b. As a result, the first roller 10 is more strongly pressed against the first guide wall 3a by the contact reaction force of the second roller 8, and the first roller 10
The frictional force between the first guide wall 3a and the first guide wall 3a increases. This tendency becomes more remarkable as the cutting resistance increases. Therefore, even if the required driving torque of the circle cutter 11 increases, the first roller 10 overcomes this and the circle cutter 11 rotates, so that the cutting resistance increases. Regardless, a good cut is always made. Although FIG. 3 shows the cutter supporting member 6 moving to the right, the same action occurs when moving to the left.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications are possible. For example, a circle cutter is normally used as a cutter, but a cutter support member is used. An ordinary non-rotary cutter may be attached to. The first and second guided parts are usually rollers, but the second guided part may be a normal sliding guide, and when the circle cutter is not used, the first guided part is also a sliding guide. May be configured.

(Effects of the Invention) As described above, the present invention guides the cutter supporting member by the three guided portions and positions the pair of second guided portions on both sides of the first guided portion in the longitudinal direction of the guide member. Since the tensile force of the cord connected to the cutter supporting member increases, the cutter supporting member tilts forward in the traveling direction by the force, and the second guided portion at the rear portion is the second guide portion of the guide member.
And the cutter supporting member is pressed against the first guide wall side by the reaction force of this contact, and therefore the cutter is removed from the sheet-shaped member having a large cutting resistance due to its relatively large thickness or hardness. It is possible to prevent the cutter or the cutter supporting member from being pushed up by the received upward force to reduce the cutting depth, and it is possible to perform accurate, beautiful, quick and stable cutting even if the cutting resistance is large. Further, since the cutter support member is arranged between the first and second guide walls, it does not take up a space, and the entire device can be made compact.

[Brief description of drawings]

1 is a front view of a cutting device according to the present invention, and FIG. 2 is a first view.
FIG. 2 is a sectional view taken along the line II-II of FIG. 3, and FIG. 3 is a sectional view taken along the line III-III of FIG. DESCRIPTION OF SYMBOLS 1 ... Cutting device, 2 ... Sheet-shaped member 3 ... Guide member, 3a ... 1st guide wall 3b ... 2nd guide wall, 5 ... Flat blade 6 ... Cutter support member, 7 ... Wire (cord) 8, 9 ... 2nd roller, 10 ... 1st roller 11 ... Circle cutter, 18, 19 ... Pulley 22 ... Motor.

Claims (2)

[Scope of utility model registration request] 1. A cutter support member having a cutter is provided between the guide walls of a guide member formed by first and second guide walls which are substantially parallel to each other along a longitudinal direction, and a cutting edge of the cutter is provided. The cord-like body, which is slidably disposed so as to project from the first guide wall side to the outside and is reciprocally driven along the longitudinal direction of the guide member, is connected to the cutter support member. A first roller guided by the first guide wall is rotatably disposed integrally with the cutter on one side of the cutter support member facing the first guide wall, and the first roller is rotatably integrated with the cutter. A pair of second rollers guided by the second guide wall opposite to the second guide wall are provided on both sides of the first roller in the longitudinal direction of the guide member, and the first roller and the second roller. Sheet-like member arranged so as to contact Cutting device. 2. The cutting device according to claim 1, wherein the cutter comprises a rotatable circle cutter, and the circle cutter is coaxially and integrally connected to the first roller to cut a sheet-shaped member. apparatus.