JPH0441195A - Sheet cutting device - Google Patents

Abstract

PURPOSE: To ideally shear a striplike sheet so as to general less paper power by cutting the sheet from it widthwise opposed ends to the center by means of a V-shaped cutting blade, and cutting the same under the condition where a receiving member is always pushed with its one elasticity against one surface of the cutter. CONSTITUTION: A strip-like sheet 48 is cut with a V-shaped cutting blade from its widthwise opposed ends to the center. Furthermore, the sheet 48 is cut under the condition where a receiving member 60 is pushed with its own elasticity against one surface of a cutter 16. Accordingly the purpose is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a sheet cutting device, and in particular to improving cutting performance.

Conventional technology sheet cutting devices are used, for example, in mini-printers such as cash registers and ticketing machines. In these cashier registers, ticket issuing devices, etc.,
A mini printer records the amount of money and proof of payment for boarding/entrance on a rolled sheet, and a cutting device is installed to cut out the recorded portion after recording. Such a sheet cutting device is -
In general, (a) a device main body; (b) a flat plate-shaped cutter having a cutting blade formed on its tip edge and supported movably in a direction intersecting the cutting blade on the device main body; (C) a receiving member that is provided in the main body of the device and works with the cutter to cut the strip-shaped sheet along a cutting line that intersects with the longitudinal direction of the sheet;
d) A cutter driving device that moves the cutter forward to a cutting position where the strip sheet is cut in cooperation with the receiving member and retreats to a non-cutting position where the strip sheet is not cut. Conventionally, the cutter has a saw-shaped cutting blade in which the triangular blade is aligned in a straight line in a direction perpendicular to the direction of movement of the cutter, and the receiving member is provided parallel to the cutting blade. received the strip sheet from the opposite side, the cutting blade was supposed to help cut the strip sheet, and was provided in a fixed position.

Problems to be Solved by the Invention However, when the cutting edge is saw-shaped like this,
The cutter cuts the strip-shaped sheet at the same time with the tips of a plurality of blades so as to cut through the strip-shaped sheet. Moreover, since the receiving member is provided in a fixed position and only supports the strip sheet from the side opposite to the cutter, it does not work with the cutting blade to shear the strip sheet, resulting in poor cutting and a large amount of cutting. There has been a problem in that paper dust is generated and deposited on the components of the cutting device and nearby recording devices, causing malfunctions thereof. For example, the return operation of the cutter becomes poor and the cutter does not return to a predetermined non-cutting position, and the cutter obstructs the progress of the belt-shaped sheet, causing jamming. Additionally, it is necessary to frequently clean the device to remove accumulated paper dust, and there is also the problem that it is on the front side.

The present invention has been made with the object of providing a cutting device that generates less paper dust.

Means for Solving the Problems In order to solve the above problems, the present invention provides a sheet cutting device having the above-mentioned (a) device main body, (c) cutter, (C) receiving member, and (d) cutter drive device. The cutting edge of the cutter is inclined so that it extends forward from the center toward both ends in the direction perpendicular to the direction of movement of the cutter, and the receiving member is made of an elastic plate material, and at least the tip thereof is approximately parallel to the cutter. They extend in opposite directions, and when cutting, the edge at the tip slides against one surface of the cutter and works with the cutting blade to shear the strip sheet, but normally the edge is closer to the other surface than the one surface of the cutter. a member having a positioning shape, and engages with both ends of the cutting blade of at least one of the cutter and the receiving member as the cutter moves forward, so that the edge slides into contact with one surface of the cutter. The device is characterized by being provided with a guide section for moving the device to the desired position.

Function In the sheet cutting device configured in this way, the guide portions are provided at both ends of the cutting blade of at least one of the cutter and the receiving member, and the cutting blade of the cutter is inclined so that both ends are at the most Since it is located on the receiving member side, when the cutter is advanced from the non-cutting position toward the cutting position during cutting, the cutter and the receiving member are first engaged in the standing guide section prior to cutting. , both ends of the edge, which had been located closer to one surface of the cutter than the other, are moved to a position where they just come into sliding contact with one surface. Since the receiving member is made of an elastic plate,
When a force is applied to both ends of the edge, an elastic force is generated in the opposite direction, and this elastic force causes the center of the edge to curve into a convex shape toward the other side of the cutter. Stay on the side. However, both ends of the cutting blade protrude forward, and the center reaches the edge later than both ends, so the cutter does not collide with the center of the edge and be prevented from moving forward. Both ends of the edge moved to a position where it comes into sliding contact with one surface of the cutting blade work together with both ends of the cutting blade to cut both ends of the strip sheet in the width direction. At this time, since the edge is pressed against one surface of the cutter by the elastic force generated in the receiving member, the strip-shaped sheet is ideally sheared by the cutting blade and the edge.

Also, as the cutting blade and the edge work together to shear the strip sheet, the part of the edge immediately in the center of the part that is performing the shearing action comes into sliding contact with one surface of the cutter. be moved into position. in the end,
As the cutter advances, the edge is gradually moved from both ends toward the center to a position where it makes sliding contact with one side of the cutter, and the part that just reaches that sliding contact position works together with the cutting blade to shear the band-shaped sheet. I will do it. Therefore, the belt-shaped sheet is always subjected to an ideal shearing action and is cut well.

If the cutter can also be elastically deformed, when the receiving member is curved by the guide, the cutter will also be curved convexly in the opposite direction due to the reaction force, and together with the curving of the receiving member, the belt-shaped sheet can be made even better. It can be sheared to

Effects of the Invention As described above, according to the sheet cutting device of the present invention, the strip-shaped sheet is cut from both ends in the width direction toward the center by the ■-shaped cutting blade, and the receiving member is cut by its own elastic force. Since the belt-shaped sheet is always cut while being pressed against one side of the cutter, the belt-shaped sheet receives ideal shearing action, resulting in less paper dust. therefore,
The occurrence of failures of the cutting device and the device in which the cutting device is installed is reduced, and the number of times of cleaning is reduced, making maintenance easier.

Embodiment Hereinafter, a case in which the present invention is applied to a recording paper cutting device for a mini printer will be explained in detail based on the drawings.

In FIG. 5, 10 is the main body of the cutting device.

A pair of plate-shaped guide members 12.1 are provided on the main body 10 of the device.
4 are provided horizontally with a gap in the vertical direction, and a cutter 16 is slidably sandwiched between these guide members 12, 14. The cutter 16 has a flat plate shape as shown in FIG. 2, and has a cutting edge 18 formed at its tip edge. The cutting blades 18 are inclined so as to extend forward (to the left in the figure) from the center toward both ends in a direction perpendicular to the moving direction of the cutter 16 (direction indicated by arrow A in the figure). As shown in FIG. 1, the cutting edge 18 is formed as an intersection line between the lower surface 20 and an inclined surface 24 that slopes backward from the lower surface 20 of the cutter 16 toward the upper surface 22, and is sharply pointed. . Lower surface 2,
“One side of the cutter” in the claims,
The upper surface 22 is the "other surface." Further, a notch 26 is formed in the center of the cutting blade 18, while guide pieces 28 are provided at both ends thereof in a direction that extends forward. Each of these guide pieces 28 has a top surface 22 and a bottom surface 2.
A guide surface 30 is formed that slopes rearward toward zero.

The cutter 16 is connected at its rear end to a plunger 34 of a solenoid 32, as shown in FIG. A main body 36 of the solenoid 32 (hereinafter referred to as the solenoid main body) is fixed on the device main body 10, and the plunger 3
4 is fitted into the solenoid body 36 in a slidable manner and extends from the solenoid body 36 to the side opposite to the cutting edge 18 of the cutter 16 . The axis of the plunger 34 is located in the same vertical plane as the center line parallel to the moving direction of the cutter 16. The lower end of the connecting plate 38 is fixed to the protruding end of the plunger 34, and the upper end of the connecting plate 38 is fixed to the protruding end of the plunger 34.
The cutter 16 and the plunger 34 are connected to each other so that they cannot move relative to each other and cannot rotate relative to each other. Further, the plunger 34 is urged to protrude from the solenoid body 36 by a spring 40 disposed between the solenoid body 36 and the connecting plate 38, and the limit of its protrusion is defined by a stopper 42. Therefore, if a coil (not shown) provided in the solenoid body 36 is excited, the plunger 34
is drawn into the solenoid body 36, the cutter 16 is advanced to the cutting position where the cutting blade 18 protrudes from the guide member 12.14 and the coil is demagnetized, and the plunger 34 is moved by the biasing force of the spring 40. causes the cutter 16 to protrude from the solenoid body 36 and retract to the non-cutting position, so that the cutting blade 18 is moved from the guide member 12.14.
withdraw inside. In this embodiment, the solenoid 32, spring 40, etc. constitute a cutter driving device.

An upper receiving member 44 and a lower receiving member 46 are provided with a gap in the horizontal direction from the guide members 12, 14, and these guide members 12, 14 and the upper receiving member 44
The recording paper 48 is passed through the gap between the lower receiving member 46 and the lower receiving member 46 . The upper receiving member 44 has a plate shape and is fixed to the apparatus main body 10, and its lower surface is provided at the same height as the lower surface of the guide member 12, as shown in FIG.

Further, the lower receiving member 46 is made of a temporary spring.

The lower receiving member 46 includes a mounting portion 50 fixed to the end of the upper surface of the upper receiving member 44 opposite to the guide member 12, a hanging portion 52 extending downward from the mounting portion 50, and a hanging portion 52. A receiving part 54 extends from the lower end of the part 52, passing under the upper receiving part 44 towards the guide member 12.14.
It consists of As shown in FIG. 2, the tip of the receiving portion 54 faces the cutter 16 and extends in a direction perpendicular to the direction of movement of the cutter 16, with the edge 56 at the tip facing the cutter 16.
The recording paper 48 is sheared together with the recording paper 48. The guide member 12.14 side of the receiving portion 54 is bent toward the upper receiving member 44, so that in the free state, the edge 56 is located closer to the upper surface 22 than the lower surface 20 of the cutter 16.

The receiving portion 54 is further provided with guide pieces 60 at portions facing the guide pieces 28 provided at both ends of the cutting blade 18. As shown in FIG. 1, these guide pieces 60 are inclined downward on the cutter 16 side, and
As will be described later, the guide pieces 28 and 28 engage with each other to move the edge 56 of the cutter 16.
It functions as a guide portion to move it to a position where it comes into sliding contact with the lower surface 20 of.

In the cutting device configured as described above, when not cutting, the cutter 16 is retracted to the non-cutting position, and the lower receiving member 46 has the edge 56 closest to the upper receiving member 44 as shown in FIG. The cutter 16 is located at a height closer to the upper surface 22 than the lower surface 20 of the cutter 16. When the coil of the solenoid 32 is excited during cutting and the cutter 16 is moved forward, the guide piece 28 first engages with the guide piece 60 as shown by the two-dot chain line in FIG. 1, causing the cutter 16 to move forward. Accordingly, the receiving portion 54 of the lower receiving member 46 is elastically deformed downward as shown by the arrow B due to the action of the slope, and the cutter 6 rides on the edge 56 as shown in FIG.
The receiving portion 54 shown in the figure is a portion near the guide piece 60).

Since both ends of the cutting blade 18 protrude forward, both ends first shear the recording paper 48 together with the edge 56, but the lower receiving member 46 is made of a leaf spring material. Therefore, due to the deformation, the lower surface 20 of the cutter 16
An elastic force is generated in the direction from the side toward the upper surface 22 side, and the edge 56 is pressed against the lower surface 20 of the cutter 16 by the elastic force, and the recording paper 48 is ideally sheared by the edge 56 and the cutting blade 18.

When the receiving portion 54 of the lower receiving member 46 is elastically deformed downward at the guide pieces 60 provided at both ends thereof,
The central portion is curved upward in a convex manner and is located above the lower surface 20 of the cutter 16.

However, since the center portion of the cutting blade 18 is farthest from the receiving portion 54 and reaches the edge 56 last, the cutter 16 does not collide with the receiving portion 54 and its forward movement is not hindered. When the cutter 16 is further advanced, the center portion of the receiving portion 54 is gradually moved downward by the cutter 16, and the edge 56 gradually touches the lower surface 20 of the cutter 16 from both ends toward the center. The recording paper 48 is moved to a sliding contact position, and the recording paper 48 is sheared together with the cutting blade 18 just at the sliding contact position. In this way, the recording paper 48 is always cut with ideal shearing action, resulting in beautiful cut edges and less paper dust.

Since a notch 26 is formed in the center of the cutting blade 18, when the cutter 16 finishes cutting the recording paper 48,
As shown in FIG. 4, the recording paper 48 is cut leaving a central portion in the width direction, and the operator of the mini printer tears the remaining portion to separate the recorded portion from the non-recorded portion.

In this embodiment, the guide portions were provided on both the lower receiving member 46 and the cutter 16, but they may be provided on only one of them. In that case, the portions of the receiving member and cutter where the guide portion is not provided will directly engage with the guide portion.

In addition, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the scope of the claims.

[Brief explanation of drawings]

FIG. 1 is a front cross-sectional view showing a cutter and upper and lower receiving members of a recording paper cutting device for a mini printer according to an embodiment of the present invention. FIG. 2 is a plan view showing the cutter and lower receiving member of the cutting device. FIG. 3 is a front sectional view showing the state in which the cutter starts cutting the recording paper, and FIG. 4 is a front sectional view showing the state in which the cutting of the recording paper ends. FIG. 5 is a diagram schematically showing the cutting device. 10: Device body 16: Cutter 18: Cutting blade 20: Bottom surface 22: Top surface 28: Guide piece 32: Solenoid 40 Spring 46: Lower receiving member 56: Edge 48: Recording paper 60: Guide piece

Claims (1)

[Scope of Claims] A device main body; a cutter having a flat plate shape, having a cutting blade formed at its tip edge, and supported by the device main body so as to be movable in a direction intersecting the cutting blade; a receiving member provided on the apparatus main body and configured to work with the cutter to cut the belt-like sheet along a cutting line intersecting the longitudinal direction thereof; and a receiving member located at a cutting position where the cutter works together with the receiving member to cut the belt-like sheet. A sheet cutting device having a cutter drive device that moves the cutter forward and moves it back to a non-cutting position where the cutter is not cut, wherein the cutting blade of the cutter extends forward from the center toward both ends in a direction perpendicular to the direction of movement of the cutter. While the receiving member is made of an elastic plate, at least its tip extends in a direction substantially facing the cutter, and during cutting, the edge of the tip slides against one surface of the cutter, and the cutting edge A member that shears the belt-shaped sheet in cooperation with the cutter and has a shape in which the edge is usually located closer to the other surface than the one surface of the cutter,
and a guide that engages with both ends of the cutting blade of at least one of the cutter and the receiving member as the cutter moves forward, and moves the edge to a position where it slides into contact with one surface of the cutter. A sheet cutting device characterized by having a section.