JP3466158B2 - Circle cutter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circle cutter for cutting paper such as facsimiles, printers and plotters.

[0002]

2. Description of the Related Art A circle cutter that moves a disk-shaped moving blade in the width direction of paper to cut the paper has a wider paper width than a type of cutter that cuts by engaging two linear blades. Even in this case, it is not necessary to increase the size of one of the blades in accordance with it, and the cutter device can be reduced in size and weight. Therefore, it has been widely used in recent years.

In a conventional circle cutter, for example, as disclosed in Japanese Patent Laid-Open No. 63-200987, a disc-shaped movable blade is rotatably attached to a movable holder, and the movable blade is moved along a fixed blade. The paper is cut in cooperation with the fixed blade while being moved. Further, there is a circle cutter which is mainly attached to a photographic printer and has two moving blades that move in parallel and at a predetermined interval in parallel.

[0004]

Since the conventional circle cutter does not have a paper pressing mechanism, the paper may move during cutting and may not be cut cleanly. Since the paper pressing mechanism has to release the state of pressing the paper so that the paper can be fed at the time of paper feeding, a complicated mechanism and power for pressing and releasing the paper are required, resulting in high cost. This is because. Further, in the above-mentioned circle cutter having two moving blades, since the moving blades have to move along the fixed blades, it is not possible to completely block the space between the fixed blades on the downstream side. It has been difficult to provide a reliable guide that reliably feeds the paper to be fed to the tip of the fixed blade.

An object of the present invention is to provide a circle cutter with the above-mentioned paper pressing mechanism and guide mechanism inexpensively and easily.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a circle cutter having two moving blades that move in parallel and at a predetermined distance in parallel and have a V-shaped cross section between the two moving blades. It has an oscillating plate, and the oscillating plate serves as a guide for closing a gap between the fixed blade on the downstream side at the time of feeding the paper, and at the time of cutting, the oscillating plate oscillates in conjunction with the movement of the moving blade to move to the fixed blade on the downstream side. It is a circle cutter characterized by forming a gap through which a moving blade passes.

Since the guide is an oscillating plate which is interlocked with the movement of the movable blade, the space between the guide and the fixed blade on the downstream side can be completely closed, and the paper can be reliably fed in the predetermined direction. At the time of cutting, the swing plate swings to form a gap with the fixed blade,
The movable blade moves along the fixed blade in this gap to cut the paper. Specifically, the oscillating plate is urged in the direction of contacting the fixed blade on the downstream side and pivotally attached to the frame, and the holder of the moving blade presses the oscillating plate as the moving blade moves during cutting. Thus, the rocking plate rocks so that a gap is formed between the rocking plate and the fixed blade on the downstream side.

[0008]

[0009]

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the drawings showing the embodiments. 1 is a side view of the circle cutter 1 of the embodiment, FIG. 2 is a bottom view of the circle cutter 1, FIG. 3 is a sectional view taken along the line AA in FIG. 2, FIG. 4 is a sectional explanatory view at the time of cutting, and FIG. It is explanatory drawing which shows the positional relationship of a fixed blade holder.

The circle cutter 1 shown in FIGS. 1 to 5 is to be attached to a so-called TA type printer dedicated to photography. This cutter is provided with two moving blades 4 and 4 for cutting a blank portion. Two moving blades 4, 4
Are rotatably attached to the movable blade holders 5 and 6, respectively,
The movable blade holders 5 and 6 are integrally connected at the top. Therefore, the two movable blades move in parallel at the same time.

The circle cutter 1 has a frame 2 to which two plate-shaped fixed blades 3 and 3, a paper feed guide 8, a paper discharge guide 9 and a motor 16 are fixed. Further, the rocking plate 7 has a V-shaped cross section, and the end portion 7a is pivotally attached to the support piece 10 attached to the frame 2, and the end portion 7b is pivotally attached to the support portion 11 formed to project from the frame. It is swingable. Further, the oscillating plate 7 is urged by a coil spring 12 provided on the shaft of the support portion 11 in a direction of contacting a fixed blade 3 on the downstream side of the paper flow (fixed blade on the paper discharge guide 9 side). Further, pulleys 13 and 14 are axially attached to the lower surface of the top plate of the frame 2, a belt 15 is stretched over these pulleys, and a movable blade holder is attached to the belt 15. The rotation of the motor 16 is transmitted to the pulley 14, and the belt 16 is rotated by the motor 16, which also causes the movable blade holders 5 and 6 to move along the fixed blade 3. As a result, the two movable blades 4 and 4 move in the horizontal direction while contacting the blade edges of the two fixed blades 3 and 3, and the movable blade and the fixed blade cooperate to cut the paper. The paper is horizontally fed through the paper supply guide 8 to the lower surface of the fixed blade 3, and the paper discharge guide 9
Is discharged through.

As shown in the upper part of FIGS. 1, 3 and 5, when the movable blade is in the standby state, the movable blade holder 5
Is not in contact with the oscillating plate 7, the oscillating plate 7 is in contact with the fixed blade on the downstream side by the action of the coil spring 12 and is closed between the fixed blade on the downstream side. Further, since the rocking plate 7 has a V-shaped cross section, the fed paper does not enter the inside of the frame and is reliably fed to the lower surface of the fixed blade.
At the time of cutting, as shown in the lower stage of FIGS. 4 and 5, the fixed blade holder 5 moves to come into contact with the rocking plate 7, and the rocking plate 7 is pushed up and rocks to separate from the fixed blade on the downstream side. Therefore, the movable blade can be used for cutting, and since the swing plate 7 closes the gap between the movable blade holders 5 and 6, the cut thin chips of the margin do not enter the frame, so that the downward movement is ensured. To fall. In FIG. 5, a chain line f indicates the level of the lower surface of the fixed blade.

FIG. 6 is a plan view of the circle cutter 21 of the reference example, FIG. 7 is a side view of the circle cutter 21, FIG. 8 is a sectional view taken along line BB in FIG. 7, and FIG. 9 is the circle cutter 21.
FIG. 10 is a side view at the time of cutting of FIG.

The cutter 21 shown in FIGS. 6 to 10 has a frame 22, a fixed blade 23, and a movable blade 25. Frame 22
Is a processed metal plate, the lower part is the guide rail 4
0, the plate-shaped fixed blade 23 is fixed,
The paper pressing mechanism 26 is pivotally mounted by pivot shafts 31 and 32, and a motor 36 is attached. The disk-shaped movable blade 25 is rotatably attached to a plastic movable blade holder 24, and the movable blade holder 24 slides horizontally along a guide rail 40. As a result, the movable blade 25 moves in the horizontal direction while contacting the blade edge of the fixed blade 23,
5 and the fixed blade 23 cooperate to cut the paper. The rotation of the motor 36 is transmitted from the motor shaft 36a and the gear 41 to the pulley 37. A belt 39 is bridged between a pulley 37 and a pulley 38 rotatably attached to the frame 22, and a movable blade holder 24 is attached to the belt 39. The belt 39 is rotated by the rotation of the motor 36,
Along with this, the movable blade holder 24 moves in the horizontal direction and cutting is performed. Since the paper is fed horizontally on the fixed blade 23, the upper surface of the fixed blade 23 serves as a paper guide portion.

The paper pressing mechanism 26 has arms 29 and 30 pivotally mounted on the frame 22 by pivot shafts 31 and 32, a rod 27 rotatably mounted on the arms 29 and 30, and a rod 27 inserted through the rod 27. It is composed of a plurality of rubber rolls 28. The base ends of the arms 29 and 30 are connected by a reinforcing plate 35. The pivot shaft 32 is provided with a coil spring 33, which constantly urges the paper pressing mechanism 26 in the direction of the fixed blade. An operating piece 34 is provided on the arm 30 so as to project therefrom.
In the standby state, as shown in FIGS. 7 and 8, the movable blade holder 24 pushes up the operating piece 34, and the rubber roll 28 of the paper pressing mechanism 26 is separated from the fixed blade 23. Therefore, the paper is placed on the fixed blade 23. Can be sent. When the movable blade holder starts moving when cutting the paper, as shown in FIGS. 9 and 10, the operating piece 34 comes off the movable blade holder 24, and the arms 29 and 30 rotate in the fixed blade direction by the action of the coil spring 33. , The rubber roll 28 approaches the upper surface of the fixed blade 23,
The paper on the fixed blade 23 is pressed and fixed. As a result, the paper is fixed at the time of cutting and can be cut cleanly. When the movable blade holder 24 returns to the standby position after the cutting is completed, as shown in FIGS. 7 and 8, the operating piece 34 is pushed up again, the rubber roll 28 is separated from the fixed blade 23, and the fixation of the paper is released. You can send it.

[0017]

The oscillating plate of the circle cutter of the present invention is
Interlocking with the movement of the moving blade, it closes the gap between the fixed blade on the downstream side during standby and reliably feeds the paper to the lower surface of the fixed blade, and when cutting, moves away from the fixed blade to enable cutting by the moving blade and move Since the blade holders 4 and 5 are closed to prevent chips from entering the frame, special power is not required, the manufacturing is inexpensive, and the structure is simple, so troubles such as breakdowns occur. Few.

[0018]

[Brief description of drawings]

FIG. 1 is a side view of a circle cutter 1 of an embodiment.

FIG. 2 is a bottom view of the circle cutter 1.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a cross-sectional explanatory view at the time of cutting.

FIG. 5 is an explanatory diagram showing a positional relationship between a swing plate 7 and a fixed blade holder 5.

FIG. 6 is a plan view of a circle cutter 21 of a reference example.

7 is a side view of the circle cutter 21. FIG.

8 is a cross-sectional view taken along the line BB in FIG.

9 is a side view of the circle cutter 21 during cutting. FIG.

10 is a sectional view taken along line CC in FIG.

[Explanation of symbols]

1 circle cutter 2 frames 3 fixed blades 4 moving blades 5 Moving blade holder 6 Moving blade holder 7 Swing plate 8 Paper supply guide 9 Paper ejection guide 10 Support pieces 11 Support 12 coil spring 13 pulley 14 pulley 15 belts 16 motor 21 circle cutter 22 frames 23 Fixed blade 24 Movable blade holder 25 moving blades 26 Paper holding mechanism 27 rods 28 rubber rolls 29 arms 30 arms 31 pivot 32 pivot 33 coil spring 34 Working piece 35 Reinforcing plate 36 motor 37 pulley 38 pulley 39 belt 40 Guide rail 41 gears

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B26D 1/18 B26D 1/14 B26D 1/20 B41J 11/70 B65H 35/08

Claims (2)

(57) [Claims] 1. A circle cutter having two moving blades that move in parallel and at a predetermined distance in parallel, and a swinging plate having a V-shaped cross section between the two moving blades. At the time of feeding, the oscillating plate serves as a guide that closes the gap with the fixed blade on the downstream side, and at the time of cutting, the gap that the movable blade passes between the fixed blade on the downstream side and swings in conjunction with the movement of the movable blade. Circle cutter characterized by forming 2. The circle cutter according to claim 1, wherein the oscillating plate is urged in a direction of coming into contact with a fixed blade on the downstream side and pivotally attached to the frame, and moves along with the movement of the movable blade during cutting. A circle cutter characterized in that the blade holder swings by pressing the swing plate.