JPH0592390A - Cutting device for image forming device - Google Patents

Abstract

PURPOSE:To reduce the cutting torque and to miniaturize a cutting device by constituting a cutting mechanism for cutting a composite tape which is lamination of an image bearing tape and a peelable sheet, into a predetermined length, such that a cutter is moved along a curved surface of a cutting plate while it is pressed by a cam. CONSTITUTION:A developed film 32 after pressure development is thermally fixed by a thermally fixing unit 30, and thereafter, is pressed by a pressing roller 34 together with a pressure sensitive adhesive double surface film 38 so as to obtain a composite tape 39 consisting of the developed film 32 and the adhesive double surface tape 38. The composite tape 39 is finally cut into a suitable length. In such an image forming device 10, the cutter part 40 is composed of a holder 42 to which two blades 41a, 41b are fixed, a cutting plate 43 having a curved surface facing the blades 41a, 41b, and a cam 44 for moving the blades 41a, 41b along the curved surface of the cutting plate 43. Further, the cutting blades 41a, 41b moved along the curved surface of the cutting plate 43 are successively moved to contact points on the cutting plate 43 along the curved surface of the latter so as to cut the composite tape 39 into a predetermined length.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for a composite tape or the like provided with a tape after image formation and a release paper laminated on the tape via an adhesive layer.

[0002]

2. Description of the Related Art Conventionally, as a method of cutting a composite tape,
For example, as disclosed in Japanese Utility Model Laid-Open No. 1-85050, there is a method in which a cutter supporting member integrally supporting a cutter is moved relative to the composite tape, or a method such as scissors.

[0003]

However, in the former method, there is a problem that the torque required for cutting becomes large as the width of the composite tape becomes long and the device becomes large in size. Further, the latter method is expensive because it is composed of two blades, an upper blade and a lower blade.

The present invention has been made in order to solve the above-mentioned problems, and suppresses the required torque even when cutting a composite tape having a wide width, prevents the apparatus from becoming large, and is inexpensive. An object is to provide a cutting device for an image forming apparatus.

[0005]

In order to achieve this object, a cutting device of an image forming apparatus of the present invention comprises a cutter, a supporting member for integrally supporting the cutter, and a curved surface provided at a position facing the cutter. And a cam provided on the back surface of the cutter supporting member so that the contact point between the cutter and the composite tape moves sequentially from the end on the curved surface of the cutting plate.

[0006]

In the cutting device of the image forming apparatus of the present invention having the above-mentioned structure, the cutter contacts the end of the composite tape, and while moving to the curved surface of the cutting plate while being pressed by the cam to some extent, the composite tape is removed. Move to the other end while cutting.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an image forming apparatus equipped with a cutting device of the present invention. A transparent plate 12 for pressing an original 11 is arranged on a bottom surface 10a of an image forming apparatus 10 (hereinafter, simply referred to as an apparatus), and a finder 13 for confirming an irradiation area of the original 11 is arranged above the transparent plate 12. ing.

A rotatable mirror 16 is arranged between the transparent plate 12 and the viewfinder 13 so as to close the viewfinder 13 during exposure. A light source 14 is arranged near the transparent plate 12 and in the center of the bottom surface 10a, and a reflector 15a is arranged around the light source 14.
A reflector 15b is provided at a position facing the light source 14, and the light from the light source 14 is focused on the entire irradiation area of the original 11. Then, the reflected light from the original 11 via the transparent plate 12 is imaged on the exposure surface 20 via the mirror 16 and the lens 18. The exposed surface 20 has two supporting rollers 24a, 2 having two photosensitive recording media 22.
It is formed by being stretched by 4b.
The photosensitive recording medium 22 is adapted to be finally wound up by the winding roller 56. The exposure means of this embodiment comprises a light source 14, reflectors 15a and 15b, a mirror 16 and a lens 18.

The pressure developing device 26 is composed of a pair of rollers 28a and 28b facing each other, and an appropriate pressure is applied between the rollers 28a and 28b during pressure development. The heat fixing device 30 is mainly composed of a heater, and has a temperature (120 ° C. to 140 ° C.) necessary for heat fixing.
C.) to contact the color developing film 32. The pressing roller 34 is composed of a pair of rollers 36a and 36b facing each other. The pressure roller 34 is sandwiched between the color developing film 32 and the double-sided adhesive tape 38 having a release paper attached on one side under a constant pressure, and the color developing film 32 is coated with the double-sided adhesive tape 38. Attach the composite tape 3
9 is formed. The cutter unit 40 includes two blades 41a and 4a.
1b is fixed to a holder 42, a cutting plate 43 having a curved surface facing the blades 41a and 41b, and blades 41a and 41b.
b is composed of a cam 44 formed so as to move along the curved surface of the cutting plate 43, and cuts the composite tape 39 into a predetermined length. At this time, the distance between the blade 41a and the blade 41b is equal to the length d of the irradiation area of the document.

Next, the control section of the apparatus 10 will be described with reference to the block diagram of FIG.

The control unit is the central processing unit 48 (hereinafter, simply
It is called a CPU), to which a start switch 50 for inputting an operation start signal is connected. Further, they are connected to the light source 14, the drive motor 53, and the heat fixing device 30 via the light amount control circuit 51, the drive control circuit 52, and the temperature control circuit 54, respectively.

Next, the image forming apparatus 1 configured as described above.
The operation of 0 will be described.

First, when the operator presses the transparent plate 12 against the document 11 and confirms the irradiation area from the finder 13 and presses the start switch 50, the mirror 16 which also functions as a shutter is rotated and the finder 13 is moved. The light source 14 is turned on, the irradiation light is condensed on the entire irradiation area of the document 11 via the reflectors 15a and 15b, and the reflected light from the document 11 is coupled to the exposure surface 20 via the mirror 16 and the lens 18. To be imaged. After exposure, the mirror 16 closes immediately. During the exposure, a photosensitive recording medium 22 is stretched between two supporting rollers 24a and 24b on the exposed surface 20, and the exposed photosensitive recording medium 22 is exposed to a proper pressure by the pressure developing device 26 together with the color developing film 32. Developed by pressure. Then, the photosensitive recording medium 22 and the color-developing film 32 are separated, and only the photosensitive recording medium 22 is wound around the winding roller 56.

On the other hand, the pressure-developed color developing film 32 is heat-fixed by the heat-fixing device 30, and then the double-sided adhesive tape 38 is used.
Along with the pressure roller 34, the developer film 3 is pressed.
The double-sided adhesive tape 38 is attached to the surface of the second color developer. As a result, the composite tape 39 on which the image is formed is completed. Finally, the image of the document 11 in the irradiated area is output as a sticker after being cut to an appropriate length by the cutter unit 40. Here, the opening / closing of the mirror 16, the pressure development, the sticking of the double-sided adhesive tape, and the driving of the cutter unit 40 are performed by the drive motor 53.

Next, the operation of the cutter section 40 will be described with reference to FIG.

As described above, the cutter unit 40 includes the holder to which the two blades 41a and 41b are fixed and the blades 41a and 41b.
b, and a cam 44 formed so that the blades 41a and 41b move along the curved surface of the cutting plate 43. The cam 44 is a cam fixed to the rotating shaft. It is composed of plates 45a and 45b.

As shown in FIG. 3, the movement of the holder 42 by the cam 44 is as follows: (a) → (b) → (c) → (d) →
The contact points between the blade 41a and the curved surface of the cutting plate 43, which are indicated by black circles in the figure, move from end to end in the order of (a).
(A) shows a state in which the cutter 42 is not operating and the holder 42 is waiting upward with a gap s between it and the cutting plate 43. (B) shows a state in which the end of the blade 41a contacts the cutting plate 43 and starts cutting the composite tape 39. (C) shows the blade 41a and the cutting plate 4
3 shows the time point when the contact point with 3 moves to the central portion and the composite tape 39 is cut almost in half. (D) shows that the contact point between the blade and the cutting plate 43 has moved further and the composite tape 39 has been completely cut. Although only the blade 41a is shown in FIG. 3, the blade 41b also performs the same operation simultaneously with the blade 41a.

Next, referring to FIG. 40, the cam plate 4 of the cam 44 will be described.
The shapes of 5a and 45b will be described.

As for the shape of the cam 44, since the blades 41a and 41b need to be moved along the curved surface of the cutting plate 43, the moving distance between the cam plate 45a and the cam plate 45b is different. The radius of the curved surface of the cutting plate 43 is R, the distance from the contact point between the cam 44 and the holder 42 to the cutting edge is A, and the distance from the center line m to the position where the cam plates 45a and 45b press the holder 42 is L1 and L, respectively.
2, the center line m and the center point of the curved surface of the cutting plate 43 and the blade 41a,
When the angle formed by the straight line connecting the contact point of 41b and the curved surface of the cutting plate 43 is θ, the stroke D1 of the cam plate 45a
The stroke D2 of the cam plate 45b can be expressed as follows (however, the origin is the intersection O of the center line m and the curved surface of the cutting plate 43).

[0021]

[Equation 1]

[0022]

[Equation 2]

Therefore, the shapes of the cam plates 45a and 45b can be obtained by synthesizing the curves of the above formula with the basic circle.

In this embodiment, the case where the photosensitive recording medium is used as the image forming means has been described, but other than the case where the photosensitive recording medium is used, for example, a heat-sensitive system using an ink ribbon, an ink jet system or the like. It is sufficiently possible to use a method of forming a composite tape by using. Further, although two blades are used in the cutter unit 40 of this embodiment, it is also possible to use one blade or two or more blades for the purpose of half-cutting.

[0025]

As is apparent from the above description, in the cutting device of the image forming apparatus of the present invention, the cutter moves on a curved cutting plate provided at a position facing the cutter, and the cutting device is combined with the cutting plate. Since the tapes are sequentially cut, the torque required for cutting can be kept substantially constant even if the width of the composite tape becomes long, so that it is possible to prevent an increase in size of the device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of the present embodiment.

FIG. 2 is a block diagram of the present embodiment.

FIG. 3 is an explanatory diagram showing a cutting operation of the cutting device of the present embodiment.

FIG. 4 is a detailed configuration diagram of the cutting device according to the present embodiment.

[Explanation of symbols]

 10 image forming apparatus 40 cutters 41a, 41b blades 42 holders 43 cutting plates 44 cams

Claims (1)

[Claims] 1. A tape for feeding a composite tape in the longitudinal direction, which comprises an image forming mechanism for forming an image on a tape, a tape on which the image is formed, and a release paper laminated on the tape via an adhesive layer. An image forming apparatus comprising a feeding device and a cutting mechanism for cutting the fed composite tape into pieces of composite tape having a predetermined length, wherein the cutting mechanism includes a cutter, and a cutter support member integrally supporting the cutter. A cutting device comprising a cutting plate having a curved surface provided at a position facing the cutter, and a cam provided on a back surface of the cutter supporting member.