JP2833830B2 - Sheet cutting equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sheet cutting device, and in particular, to a sheet cutting device.
It relates to improvement of cutting performance.

2. Description of the Related Art A sheet cutting device is used, for example, in a mini printer such as a cash register or a ticket issuing device. In these cash registers and ticketing devices, the amount of money and the paid-payment certificate for boarding and entering are recorded on a mini-printer in the form of a band and rolled up in a sheet. Thereafter, a cutting device is provided for cutting out the recorded portion. Such a sheet cutting device is generally (a) a device main body, and (b) a plate-like shape, and has a cutting edge formed at a leading edge thereof, and is movable in a direction intersecting the cutting blade with the device main body. (C) a receiving member provided on the apparatus main body, which cuts the band-shaped sheet along a cutting line intersecting the longitudinal direction thereof in cooperation with the cutter;
(D) The cutter driving device is configured to advance to a cutting position where the cutter cuts the band-shaped sheet in cooperation with the receiving member and to retract to a non-cutting position where cutting is not performed. Conventionally, the cutter has a saw-shaped cutting edge in which triangular blades are aligned in a direction orthogonal to the direction of movement of the cutter, and the receiving member is provided in parallel with the cutting edge and has a cutting edge. Received the band-shaped sheet from the opposite side, and the cutting blade was intended to assist in cutting the band-shaped sheet, and was provided in a fixed position.

However, when the cutting blade has a saw-like shape, the cutter cuts the band-shaped sheet so that the tips of the blades cut into the band-shaped sheet at the same time and break through the band-shaped sheet. Moreover,
The receiving member is provided at a fixed position, and only supports the band-shaped sheet from the side opposite to the cutter, but does not shear the band-shaped sheet in cooperation with the cutting blade, so that the cutting is poor and a large amount of paper dust is generated. Is generated and accumulates on constituent members of the cutting device and the recording device in the vicinity, and there is a problem that causes malfunction of those devices. For example, the return operation of the cutter deteriorates and the cutter does not return to the predetermined non-cutting position, and the cutter hinders the advancement of the belt-like sheet and causes jamming. Further, it is necessary to frequently clean the apparatus in order to remove the accumulated paper dust, which is also troublesome.

An object of the present invention is to provide 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)
Device body, (b) cutter, (c) receiving member, and (d)
The cutting edge of the cutter of the sheet cutting device having the cutter driving device is inclined so as to extend forward from the center in the direction orthogonal to the moving direction of the cutter toward both ends, while the receiving member is formed of a plate material having elasticity. At least the tip extends in a direction substantially opposite to the cutter, and at the time of cutting, the edge of the tip slidably contacts one surface of the cutter and shears the band-shaped sheet in cooperation with the cutting blade. A member having a shape located on the other surface side from one surface, and at least one of the cutter and the receiving member, at both ends of the cutting blade, engaged with the other as the cutter advances, the edge And a guide portion for moving the cutter to a position where it slides on one surface of the cutter.

In the sheet cutting device configured as described above, the guide portions are provided at both ends of at least one of the cutting edge of the cutter and the receiving member, and the cutting edge of the cutter is inclined so that the both end portions are the most. Because the cutter is located on the receiving member side, if the cutter is advanced from the non-cutting position toward the cutting position during cutting, first, the cutter and the receiving member are engaged in the guide portion prior to cutting, and Until then, both ends of the edge located on one side of the cutter on the other side are moved to a position where they are in sliding contact with one side. Since the receiving member is made of an elastic plate,
When a force is applied to both ends of the edge, a reverse elastic force is generated, and the elastic force causes the central portion of the edge to be curved into a convex shape on the other side of the cutter. Continue to be located on the side. However, the cutting blade has both ends protruding forward, and the center reaches the edge later than the ends, so that the cutter does not hit the center of the edge and is prevented from moving forward. Both ends of the edge moved to a position where it slides on one surface of the cutting sheet cooperate with both ends of the cutting blade to cut both ends in the width direction of the belt-shaped sheet. 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 sheet is ideally sheared by the cutting blade and the edge.

In addition, as the cutting edge and the edge jointly shear the band-shaped sheet, the portion of the edge immediately on the center side of the shearing portion just slides on the one surface of the cutter by the cutter. Moved to a position. After all, the edge is gradually moved from both ends toward the center as the cutter advances, to a position where the edge slides on one surface of the cutter. Will be sheared. Therefore,
The band-shaped sheet is always subjected to an ideal shearing action and is cut well.

When the cutter can be elastically deformed, when the receiving member is bent by the guide portion, the cutter is also bent in the opposite direction by the reaction force, and the band-shaped sheet is further improved in combination with the receiving member and the bending. Can be sheared.

As described above, according to the sheet cutting apparatus of the present invention, the belt-shaped sheet is cut from both ends in the width direction toward the center by the V-shaped cutting blade, and the receiving member is caused by its own elastic force. Since the band-like sheet is always cut while being pressed against one surface of the cutter, the band-like sheet is subjected to an ideal shearing action, and the generation of paper dust is reduced. Therefore, the occurrence of failure of the cutting device and the device provided with the cutting device is reduced, the number of times of cleaning is reduced, and maintenance is facilitated.

Hereinafter, a case where the present invention is applied to a recording paper cutting device of a mini printer will be described in detail with reference to the drawings.

In FIG. 5, reference numeral 10 denotes a main body of the cutting device. A pair of plate-shaped guide members 12, 14 are provided horizontally on the apparatus main body 10 with a gap in the vertical direction, and a cutter 16 is slidable between the guide members 12, 14. It is sandwiched.
As shown in FIG. 2, the cutter 16 has a flat plate shape, and a cutting edge 18 is formed at a leading edge thereof. This cutting blade 18 is
Are inclined in such a direction as to extend forward (to the left in the figure) from the center in the direction orthogonal to the moving direction (the direction indicated by the arrow A in the figure). As shown in FIG. 1, the cutting blade 18 has an inclined surface 24 that is inclined rearward from the lower surface 20 of the cutter 16 toward the upper surface 22 and a lower surface 24.
It is formed as a line of intersection with 20 and is sharply pointed.
The lower surface 20 is the "one surface of the cutter" in the claims.
And the upper surface 22 is the “other surface”. A notch 26 is formed at the center of the cutting blade 18, while guide pieces 28 are provided at both ends in a direction to extend forward.
Each of the guide pieces 28 has a guide surface 30 that is inclined rearward from the upper surface 22 to the lower surface 20.

The cutter 16 is connected at its rear end to a plunger 34 of a solenoid 32, as shown in FIG.
Main body of solenoid 32 (hereinafter referred to as solenoid main body)
36 is fixed on the apparatus main body 10, and the plunger 34 is fitted to the solenoid main body 36 so as to be slidable and extend from the solenoid main body 36 to the side opposite to the cutting blade 18 of the cutter 16. The axis of the plunger 34 is located in the same vertical plane of a center line parallel to the moving direction of the cutter 16. The lower end of the connecting plate 38 is fixed to the projecting end of the plunger 34,
Its upper end is fitted into a fitting hole at the rear end of the cutter 16, whereby the cutter 16 and the plunger 34 are connected so that they cannot move relatively and cannot rotate. The plunger 34 is urged by a spring 40 disposed between the solenoid main body 36 and the connecting plate 38 in a direction in which the plunger protrudes from the solenoid main body 36, and the protruding limit is defined by a stopper 42. Therefore, when a coil (not shown) provided in the solenoid body 36 is excited, the plunger 34 is drawn into the solenoid body 36 and the cutter 16
When the cutting blade 18 is advanced from the guide members 12 and 14 to the cutting position where cutting is performed and the coil is demagnetized, the plunger 34 is protruded from the solenoid body 36 by the urging force of the spring 40, and the cutter 16 is moved. The cutting blade 18 is retracted to the non-cutting position, and the cutting blade 18 is retracted into the guide members 12 and 14. In the present embodiment, the solenoid 32, the spring 40 and the like 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 with respect to the guide members 12, 14, and these guide members 12, 14 and the upper receiving member 44 and the lower receiving member 46 are provided. The recording paper 48 is passed through the gap. 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. Also, the lower receiving member 46
Is made of a leaf spring. The lower receiving member 46 has a mounting portion 50 fixed to an 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. And a receiving portion 54 extending from the lower end of the portion 52 under the upper receiving member 44 toward the guide members 12 and 14. The distal end of the receiving portion 54 is opposed to the cutter 16 as shown in FIG. Shear 48 The receiving portion 54 is provided with a guide member 12,1.
The four sides are bent toward the upper receiving member 44 so that the edge 56 is located closer to the upper surface 22 than the lower surface 20 of the cutter 16 in the free state.

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, respectively. These guide pieces 60 are, as shown in FIG.
It is inclined downward about the 16th side and is provided at substantially the same height as the engagement piece 28, and engages with each other and slides the edge 56 on the lower surface 20 of the cutter 16 together with the guide piece 28, as described later. It functions as a guide that moves to the contact position.

In the cutting device configured as described above, the cutter 16 is retracted to the non-cutting position when not cutting, and the lower receiving member 46 has the edge 56 that is closest to the upper receiving member 44 as shown in FIG. It is at a height closer to the upper surface 22 than the lower surface 20 of the cutter 16. Then, when the coil of the solenoid 32 is excited at the time of cutting and the cutter 16 is advanced, first, as shown by a two-dot chain line in FIG.
And the receiving portion 54 of the lower receiving member 46 is elastically deformed downward as shown by the arrow B by the action of the slope as the cutter 16 advances, so that the cutting blade 16 has the edge as shown in FIG. (The receiving portion 54 shown in FIG. 3 is a portion near the guide piece 60). Since the cutting blade 18 is projected forward toward both ends, the 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. Due to the deformation, an elastic force in a direction from the lower surface 20 side of the cutter 16 toward the upper surface 22 side is generated, and the edge 56 is pressed against the lower surface 20 of the cutter 16 by the elastic force, and the recording paper is formed by the edge 56 and the cutting blade 18. 48 is ideally sheared.

When the receiving portion 54 of the lower receiving member 46 is elastically deformed downward by the guide pieces 60 provided at both ends thereof, the central portion is curved upwardly convex and is located above the lower surface 20 of the cutter 16. It will be. However, the central part of the cutting blade 18 is
Is the furthest from
The cutter 16 does not collide with the receiving portion 54 and does not hinder its advance. And if the cutter 16 is advanced further,
The central portion of the receiving portion 54 is gradually moved downward by the cutter 16, and the edge 56 is gradually moved from both end portions toward the center to a position where the edge 56 is in sliding contact with the lower surface 20 of the cutter 16, and the position where the edge 56 is just in sliding contact Recording paper 48 in cooperation with the cutting blade 18 at
Shear. As described above, the recording paper 48 is always cut by the ideal shearing action, so that a beautiful cut edge can be obtained and the generation of paper dust can be reduced.

Since the notch 26 is formed at the center of the cutting blade 18, when the cutting of the recording paper 48 by the cutter 16 is completed, the recording paper 48 is cut while leaving the center in the width direction as shown in FIG. The rest is broken by the operator of the mini printer to separate the recorded portion from the non-recorded portion.

In the present embodiment, the guide portion is provided on both the lower receiving member 46 and the cutter 16, but may be provided only on one of them. In that case, a portion where the guide portion between the receiving member and the cutter is not provided directly engages with the guide portion.

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

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a cutter and upper and lower receiving members of a recording paper cutting device of a mini printer according to an embodiment of the present invention. FIG. 2 is a plan view showing a cutter and a lower receiving member of the cutting device. FIG. 3 is a front sectional view showing a recording paper cutting start state by the cutter, and FIG. 4 is a front sectional view showing a recording paper cutting end state. FIG. 5 is a view schematically showing the cutting device. 10: Machine body, 16: Cutter 18: Cutting blade, 20: Lower surface 22: Upper surface, 28: Guide piece 32: Solenoid, 40: Spring 46: Lower receiving member, 48: Recording paper 56: Edge, 60: Guide piece

──────────────────────────────────────────────────続 き Continuing on the front page (72) Motohiro Furuikeya 1-10-1 Korai, Oiso-cho, Naka-gun, Kanagawa Prefecture NRC Japan, Ltd. Oiso Development & Manufacturing Division (58) Field surveyed (Int. Cl. ⁶ , DB name) B26D 1/06

Claims (1)

(57) [Claims] An apparatus main body; a plate-shaped cutter having a cutting edge formed at a leading edge thereof; and a cutter supported by the apparatus main body so as to be movable in a direction intersecting with the cutting blade. A receiving member provided on the main body and cutting the band-shaped sheet along a cutting line intersecting with a longitudinal direction of the band-shaped sheet in cooperation with the cutter; and a cutting position for cutting the band-shaped sheet with the cutter in cooperation with the receiving member. And a cutter driving device for retracting to a non-cutting position where cutting is not performed, wherein the cutting blade of the cutter extends forward from the center in a direction orthogonal to the moving direction of the cutter toward both ends. The receiving member is made of a plate having elasticity, and at least the tip portion extends in a direction substantially facing the cutter, and the edge of the tip portion when cutting. Sliding contact with one surface of the cutter, but shearing the strip sheet in cooperation with the cutting edge, usually a member having a shape in which the edge is positioned on the other surface side of the one surface of the cutter,
A guide for engaging at least one of the cutter and the receiving member at both ends of the cutting blade with the other as the cutter advances, and moving the edge to a position where the edge slides on one surface of the cutter; A sheet cutting device characterized by having a section.