JP3127201U - Sheet cutter - Google Patents

Abstract

[PROBLEMS] To select a full cut and a partial cut when cutting a sheet, as well as to make the uncut width in the partial cut stepless and an appropriate width, and therefore to replace the movable blade regardless of the type of the sheet. It is intended to provide a sheet cutter that is not necessary.
A fixed blade having a straight blade portion formed in a straight shape in a longitudinal direction, and a cutting edge portion formed in a V shape so as to be engaged with the straight blade portion of the fixed blade, the fixed blade In a sheet cutter comprising a movable blade pressure contact member that is in pressure contact with the movable blade and a movable blade driving means that drives the movable blade forward and backward, a trapezoidal uncut portion that linearly narrows toward the back in the center of the movable blade. A sheet cutter provided with a groove.
[Selection] Figure 6

Description

The present invention relates to a structure of a sheet cutter for cutting sheets such as paper and plastic film in various printers and ticket issuing machines.

In recent years, there are many requests for sheet material cutting devices for mini printers such as ticket vending machines and registers that can select two types of cutting, full cut and partial cut, and this mini printer is used outdoors (for example, vending machines, Often used at gas stations. Japanese Utility Model Publication No. 63-16138 (refer to Patent Document 1) and Japanese Patent Application Laid-Open No. 6-47696 (refer to Patent Document 2) use a movable blade driving mechanism as described above, and a conventional cutting edge line is V-shaped. Alternatively, two types of uncut widths are selected with a saw-shaped movable blade.

However, when used outdoors, the cut sheet may be blown by the wind in the case of full cut, and the conventional uncut width of about 1.5 mm is insufficient for the partial cut. In some cases, the uncut portion was broken.

Therefore, as shown in Japanese Patent Application Laid-Open No. 2000-52292 (see Patent Document 3), a fixed blade and a movable blade that cuts the sheet material by moving forward while cutting the blade edge lines together with the fixed blade are provided. In the sheet cutter, the movable blade has a notch in the blade edge portion, and the notch is continuous with the wide first portion and the wide first portion, and the cutting advance of the wide first portion is performed. The movable blade is formed of a narrow second portion formed at a position opposite to the direction, and one of the wide first portion and the narrow second portion coincides with the cutting edge line of the fixed blade. There has been proposed a sheet cutter that allows selection of the end position of the forward movement.
Japanese Utility Model Publication No. 63-16138 JP-A-6-47696 JP 2000-52292 A

In Japanese Patent Laid-Open No. 2000-52292 (see Patent Document 3), as described above, the notch is continuous with the wide first portion and the wide first portion, and the cutting forward direction of the wide first portion. Of the movable blade so that either the wide first portion or the narrow second portion coincides with the cutting edge line of the fixed blade. The end position of the forward movement can be selected.

Certainly, in Japanese Patent Application Laid-Open No. 2000-52292 (see Patent Document 3), the cut sheet may be blown off by the wind in the full cut, and the conventional uncut width of about 1.5 mm even in the partial cut. There is a temporary solution to the problem that the uncut portion may be broken by the wind due to the lack of width.

However, there are various types of sheets such as paper and plastic film used in various printers, ticket issuing machines, and the like, and specific dimensions of a notch comprising a wide first portion and a narrow second portion. It was necessary to change according to the kind of sheet. For this reason, a plurality of different types of movable blades must be prepared, and there is a problem that it takes time and effort to exchange them.

In this device, full cut and partial cut can be selected when cutting the sheet, as well as the uncut width in the partial cut can be set to an appropriate width without changing the movable blade regardless of the type of sheet. It is intended to provide a sheet cutter that does not need to be done.

In order to achieve the above object, a sheet cutter according to the present invention is formed in a V shape so as to be opposed to a fixed blade having a straight blade portion formed in a straight shape in the longitudinal direction and the straight blade portion of the fixed blade. In a sheet cutter having a formed blade edge portion and comprising a movable blade pressing member that is in pressure contact with the fixed blade and a movable blade driving means that drives the movable blade forward and backward, the center of the movable blade goes to the back. Therefore, a trapezoidal uncut groove that is linearly narrowed is provided.

The sheet cutter of the present invention has a fixed blade having a straight blade portion formed in a straight shape in the longitudinal direction, and a cutting edge portion formed in a V shape so as to face the straight blade portion of the fixed blade, In a sheet cutter comprising a movable blade pressing member that presses against the fixed blade and a movable blade driving means that drives the movable blade forward and backward, a trapezoidal shape that linearly narrows toward the back in the center of the movable blade Since the left uncut groove is provided, not only the full cut and the partial cut can be selected when cutting the sheet, but also the uncut width in the partial cut can be set to an appropriate width without any step.
Therefore, according to the sheet cutter of the present invention, it is not necessary to replace the movable blade regardless of the type of sheet, and the structure is simple and does not require time and effort for maintenance. can do.

Embodiments of the sheet cutter of the present invention will be described below with reference to the drawings.
1 is a plan view showing an embodiment of a sheet cutter according to the present invention, FIG. 2 is an enlarged side view thereof, FIG. 3 is an exploded perspective view thereof, and FIG. 4 is an exploded perspective view seen from another direction.
5 is a plan view showing a cutting state with a maximum width in a partial cut, FIG. 6 is a plan view showing an intermediate cutting state, FIG. 7 is a plan view showing a cutting state with a minimum width, and FIG. 8 is a cutting with a full cut. It is a top view which shows a state.
Next, an embodiment of the sheet cutter according to the present invention will be described with reference to FIGS.

1 to 4, the housing bottom plate 11 is provided with a fixed blade 13 at an end thereof through a sheet insertion opening 12. A motor 14 is fixed to the lower surface of the housing bottom plate 11, and the motor 14 is connected to a drive circuit (not shown).
The first movable blade drive gear 17 is engaged with the drive gear 15 of the motor 14 disposed so as to protrude on the housing bottom plate 11 with the movable blade 16 interposed therebetween, and the second movable blade drive is engaged with the first movable blade drive gear 17. The gear 18 is assembled so as to mesh with each other. The first movable blade drive gear 17 and the second movable blade drive gear 18 are configured to rotate with the rotation of the motor 14.

In the figure, reference numerals 19 and 20 denote rotating shafts attached to the housing top plate 26, and the first movable blade driving gear 17 and the second movable blade driving gear 18 are pivotally attached to each other. Reference numerals 21 and 22 denote movable blade drive pins which are fitted into drive grooves 23 and 24 formed in a straight line along the width direction of the movable blade 16. Therefore, when the first movable blade drive gear 17 and the second movable blade drive gear 18 rotate as the motor 14 rotates, the movable blade drive pins 21 and 22 that rotate with the rotation of the motor 14 are engaged with the drive grooves 23 and 24. Together, the movable blade 16 advances and retreats toward the fixed blade 13.
The above is the movable blade driving means.

The mutual relationship between the fixed blade 13 and the movable blade 16 will be described in detail with reference to FIG. The movable blade 16 has movable blade guide portions 25 at both ends thereof, and the movable blade guide portion 25 contacts the fixed blade 13, and the movable blade 16 contacts the fixed blade 13 even when the movable blade 16 is retracted. It protrudes so as not to deviate from the state. Between the movable blade guide portions 25 formed at both ends in the width direction, a central portion is formed in a V shape that is retreated with respect to the fixed blade 13, and two oblique straight lines are combined with the straight fixed blade 13. It has a cutting edge portion 16 'of the form. The reason why the blade edge portion 16 ′ is inclined is that the blade edge portion 16 ′ of the movable blade 16 is inclined with respect to the linear fixed blade 13 and the sheet 10 is efficiently cut by the stagnation effect. .

A movable blade pressing member 31 is sandwiched between the movable blade 16 disposed on the housing bottom plate 11 so as to contact the fixed blade 13 and the housing top plate 26. The movable blade pressure contact member 31 is formed of a wear-resistant plastic molded product, and is disposed in a straight line in the same direction as the straight fixed blade 13.
That is, examples of the wear-resistant plastic molded material constituting the movable blade pressure contact member 31 include polyamide (PA), polyacetal (POM), polycarbonate (PC), polybutylene terephthalate (PBT), modified polyphenylene oxide (modified). Engineering plastics such as PPO / PPE), polyphenylene sulfide (PPS), polysulfone (PSU), polyethersulfone (PES), and polyetheretherketone (PEEK) are suitable.
As shown in FIGS. 1 and 2, such a wear-resistant plastic molded material is formed so that the pressing end surface of the movable blade pressing member 31 is flat and the opposite surface is concave. Reference numeral 32 denotes a reinforcing rib formed on the concave surface on the opposite side, and 33 denotes a cylindrical coil spring accommodating portion disposed at a predetermined interval at an appropriate position on the concave surface. In the figure, the coil spring accommodating portion 33 is formed in the vicinity of both ends in the length direction of the movable blade pressure contact member 31 and substantially at the central portion, and the coil spring 34 is accommodated in each of them.
The pressure contact force of the movable blade pressure contact member 31 is determined by the elastic force of the coil spring 34. The elastic force of the coil spring 34 can be appropriately adjusted by the thickness and diameter of the wire, the resilience, etc.

The movable blade pressing member 31 is disposed at a position near the cutting edge of the linear fixed blade 13 on the movable blade 16. This position is such that the movable blade pressing member 31 presses a position close to a meshing point with the fixed blade 13 of the movable blade 16, which will be described later, and the cutting edge portion 16 ′ of the movable blade 16 is strongly pressed against the linear fixed blade 13. At the same time, it is set so that the sheet 10 can be easily loaded between the blade edge of the fixed blade 13 and the movable blade pressure contact member 31. Further, as shown in FIG. 2, the movable blade 16 is inclined in the direction in which the blade edge is far away by the thickness of the fixed blade 13, and the end portion of the movable blade 16 opposite to the blade edge portion 16 ′ is weakened to the housing bottom plate 11. It is in pressure contact.

The movable blade pressure contact member 31 configured as described above is substantially equal to the overall thickness of the drive gear 15 of the motor 14 and the first and second movable blade drive gears 17 and 18 meshing with each other, as shown in FIG. The thickness of the sheet cutter can be made very compact. Reference numeral 35 denotes a concave notch provided on the end surfaces of the movable blade pressure contact member 31 on the first and second movable blade drive gears 17 and 18 side. The notch 35 includes the first and second movable blade drive gears 17 and 18. The end portion is accommodated so that the depth of the housing is also compact.

Reference numeral 41 denotes a cover that covers a reduction gear disposed on the lower surface of the housing bottom plate 11. On the other hand, a taper-shaped uncut groove 43 is formed in the center of the V shape of the movable blade 16.
The uncut groove 43 is formed in a trapezoidal shape that opens on the side of the cutting edge portion 16 ′ of the movable blade 16 and linearly narrows toward the back.
Then, by adjusting the stroke of the movable blade 16, the advance distance of the tapered uncut groove 43 at the center of the movable blade 16 with respect to the linear fixed blade 13 is increased or decreased, and the uncut width in the uncut groove 43 is adjusted. Can do.

The state in which the movable blade 16 advances with respect to the fixed blade 13 and cuts the sheet will be described with reference to FIGS. 1 to 4. When the movable blade 16 moves forward, the blade edge portion 16 'of the movable blade 16 starts to mesh with the blade edge of the linear fixed blade 13 from both ends and moves toward the center.
When the movable blade 16 moves forward in the direction of the fixed blade 13, the left and right meshing points also move toward the center, and the cutting edge portion 16 ′ of the movable blade 16 and the cutting edge of the linear fixed blade 13 are located on both sides. They are engaged at the engagement point.
Next, when the movable blade 16 moves forward in the direction of the fixed blade 13 to the almost complete position, both the meshing points also move to the center, and the cutting edge portion 16 ′ of the movable blade 16 and the cutting edge of the linear fixed blade 13 are substantially the same. Engage in the middle.
In any stage, the movable blade pressure contact member 31 is disposed at a position near the cutting edge of the linear fixed blade 13 on the movable blade 16, so that the movable blade pressure contact member 31 is connected to the fixed blade 13 of the movable blade 16. By pressing a position close to the meshing point, the blade edge portion 16 ′ of the movable blade 16 can be strongly pressed against the linear fixed blade 13.

Therefore, while the movable blade 16 moves from the most retracted position to the most advanced position with respect to the fixed blade 13, the blade edge portion 16 ′ of the movable blade 16 always moves while being pressed against the blade edge of the linear fixed blade 13. Therefore, the sheet 10 can be cut with a clean cut surface with a light moving load.

At that time, the stroke of the movable blade 16 is adjusted by the motor 14 and the home position detection switch 42 installed on the lower surface of the housing bottom plate 11, and the taper-shaped uncut groove 43 at the center of the movable blade 16 with respect to the linear fixed blade 13. , And the uncut width in the uncut groove 43 can be adjusted as appropriate.

A method of adjusting the uncut width in the uncut groove 43 of the present invention will be described with reference to FIGS.
When the stroke of the movable blade 16 is adjusted by the stepping motor 41 and the home position detection switch 42 installed on the lower surface of the housing bottom plate 11, and the movable blade 16 as a whole overlaps the linear fixed blade 13, the position shown in FIG. In this way, the entire sheet is cut leaving the central tapered groove 43. In the state of FIG. 8, the uncut width in the uncut groove 43 is the maximum width.

Next, when the motor 14 is driven to move the movable blade 16 forward by an appropriate distance, the cutting edge of the fixed blade 13 advances to a substantially central position in the groove 43 as shown in FIG. It is wide.
Further, when the motor 14 is driven to move the movable blade 16 forward by an appropriate distance, the blade edge of the fixed blade 13 advances to a position behind the uncut groove 43 as shown in FIG. 7, and the uncut width becomes the minimum width. ing.
Thereafter, when the motor 14 is driven to move the movable blade 16 forward by an appropriate distance, the cutting edge of the fixed blade 13 passes through the uncut groove 43 as shown in FIG. .

As described above, the uncut groove 43 is formed in a trapezoidal shape that opens on the side of the cutting edge portion 16 ′ of the movable blade 16 and linearly narrows toward the back. Of course, the cut and partial cut can be selected, and the uncut width in the partial cut can be set to an appropriate width without any step.
Therefore, according to the sheet cutter of the present invention, it is not necessary to replace the movable blade 16 regardless of the type of sheet, and the structure is simple and does not require time and effort for maintenance. Can be provided.

The sheet cutter of this device can be used for cutting sheets such as paper and plastic film in various printers and ticketing machines, but the base paper or raw material sheet is continuously formed in a roll shape. It can be suitably used for apparatuses such as printers and ticket machines of the type that are supplied automatically.

It is a top view which shows one Example of the sheet cutter of this invention. It is the enlarged side view. FIG. It is the disassembled perspective view seen from another direction. It is a top view which shows the cutting state of a full cut. It is a top view which shows the cutting state of intermediate uncut width. It is a top view which shows the cutting state of the minimum uncut width. It is a top view which shows the cutting state of the largest uncut width in the partial cut.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Housing bottom plate 12 Sheet insertion port 13 Fixed blade 14 Motor 15 Drive gear 16 Movable blade 16 'Blade edge part 17 First movable blade drive gear 18 Second movable blade drive gears 19, 20 Rotating shafts 21, 22 Movable blade drive pin 23, 24 Driving groove 25 Movable blade guide part 26 Housing top plate 31 Movable blade pressure contact member 32 Reinforcement rib 33 Coil spring accommodating part 34 Coil spring 35 Notch 41 Gear cover 42 Home position detection switch 43 Uncut groove

Claims (1)

A fixed blade having a straight blade portion formed in a straight shape in the longitudinal direction, and a cutting edge portion formed in a V shape so as to be engaged with the straight blade portion of the fixed blade, and press-contacted to the fixed blade In a sheet cutter comprising a movable blade pressure contact member and a movable blade drive means for driving the movable blade forward and backward, a trapezoidal uncut groove that linearly narrows toward the back is provided at the center of the movable blade. A sheet cutter characterized by that.

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