JPS604059A - Heat sensitive duplicating machine - Google Patents

Abstract

PURPOSE:To suitably carry out the registering of copy sheet by control of inserting amount of copy sheet, by a construction wherein either of optical transmission plate and pressing plate is supported to be able to be rotated and either edge part abuts against another plate when not held by pressure. CONSTITUTION:The pressing plate support member 6 is fixedly arranged supporting the optical transmission plate 2 above it and the pressing plate 9 is supported to be able to be rotated with a pivot 7 via a swing lever 8. when the pressing plate 9 is at a position where it is not held by pressure, it is pivotted downward by its own weight and contacted with the upper surface of optical transmission plate 3 at the edge part 10 on the opposite side of the edge part on pivot support side. The heat sensitive duplicating sheet S is set after preliminarily passing on the optional transmission plate 3 and the copy sheet is inserted between optical transmission plate 3 and pressing plate 9 from pivot side 7 and laid on the top of heat sensitive duplicating sheet S on the optical transmission plate 3. The amount of insertion of copy sheet D is suitably determined if only it is inserted until its top part hits against the vicinity of pressing plate 9 or the rubber plate 11 and the copy sheet is registered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal copying apparatus, and more particularly to a thermal copying apparatus used for thermal copying plate making of stencil printing paper.

As one of the thermal copying devices used for thermal copying plate making of stencil printing base paper, the original sheet and the thermal copying sheet are inserted between the light transmitting plate and the pressure plate provided in the light irradiation window. A device configured to selectively apply pressure to a polymer for exposure is well known.

When a continuous sheet-like thermal copying sheet is used in the above-mentioned thermal copying apparatus, the thermal copying sheet is passed between a light transmitting plate and a pressing plate in advance, and the thermal copying sheet is passed between a light transmitting plate and a pressing plate. During thermal copying, an original sheet is manually inserted between a light-transmitting plate and a pressing plate, and is superimposed on the thermal copying sheet on the light-transmitting plate. In this case, if the insertion position of the leading edge of the original sheet is not regulated, thermal copying will not be performed at the correct position on the thermal copying sheet.
The image on the #i1 portion of the original sheet may not be copied, or a large blank space may appear at the leading edge of the thermal copying sheet.

For this reason, in conventional thermal copying devices, a scale is provided on the document placement surface of the document set table according to the standard dimensions of the document sheet, and by aligning the trailing edge of the document sheet with the scale, The positioning of the original sheet is being performed. However, positioning using the method described above has poor operability,
Variations in positioning work tend to occur, and accurate positioning can only be performed for original sheets of standard size.

The present invention includes a stopper mechanism that prevents further insertion of the original sheet when the leading edge of the original sheet reaches a proper position, and the original sheet hits the stopper line groove between the light transmission plate and the suppression plate. The document sheet can be appropriately positioned by simply inserting the document sheet up to the original size, regardless of the size of the document, and the stopper mechanism is configured so that the stopper mechanism does not interfere with the pinching of the polymer by the light transmitting plate and the pressing plate. The purpose of the present invention is to provide a thermal copying apparatus with a high temperature.

The present invention provides thermal copying in which a polymer of an original sheet and a thermal copying sheet inserted between them is selectively compressed and exposed by a light transmitting plate and a pressing plate provided in a light irradiation window. In the device, either the light transmitting plate or the pressing plate is rotatably supported by a pivot extending along an axis perpendicular to the insertion direction of the polymer, and the light transmitting plate and the pressing plate are rotatably supported. This is achieved by a thermosensitive copying apparatus which is configured such that the edge of either the light transmitting plate or the suppressing plate abuts the other when the plates are separated from each other and are not pressed.

According to this configuration, the leading edge of the original sheet inserted between the light transmitting plate and the suppression plate hits the light transmitting plate or the vicinity of the edge of the light transmitting plate, thereby preventing further insertion. This restricts the insertion of the original sheet m, thereby properly positioning the original sheet.

The invention will now be described in detail by way of example embodiments with reference to the accompanying drawings.

FIG. 1 shows one embodiment of a thermal copying apparatus according to the present invention. In the figure, 1 indicates the light source box,
The light source box has a frontage at the top! It has a closed light irradiation window 2,
A light transmitting plate 3 made of a transparent glass plate or the like is attached to the light irradiation window 6.Light source 'IC'921 G, t
-1') Internal 1 x 5'' discharge It has a light source device 4 such as a tube and a reflecting mirror 5, and is designed to emit light toward the light transmitting plate 3.

Above the light transmitting plate 2, a suppressing plate support member 6 is provided opposite to the light transmitting plate 2.
is fixedly placed. The suppression plate support member 6 is provided with a swing lever 8 by a pivot shaft 7 near one edge of both ends thereof.
One end of the lever is rotatably supported, and a suppression plate 9 made of a cushion member is attached to the swing lever. That is, the pressing plate 9 is moved to the pressing plate support 6 by the pivot shaft 7 extending along the axis perpendicular to the insertion direction of the original sheet D between the light transmitting plate 3 and the suppressing plate 9 via the swing lever 8. When it is in the non-squeezing position separated from the light transmitting plate 3, it rotates downward due to its own weight, and the light is emitted at the edge 10 on the opposite side from the edge on the pivot side. It is in contact with the upper surface of the transmission plate 3. Further, a relatively thin rubber plate 11 is attached to the edge 10 of the pressing plate 9.

The light source box 1 is rotated by a cam 12 that is rotationally driven by an electric motor (not shown), and is moved to a non-squeezed position where it is separated from the pressing plate 9 as shown in FIGS. 1 and 2, and to a non-squeezed position as shown in FIG. As shown, it can move up and down between the pressing position and the pressing position pushed by the pressing plate 9.

The thermal copying sheet S is set in advance by passing over the light transmitting plate 3 so as to extend, and when thermally copying one original sheet D, the original sheet is held in the hand as shown by the arrow in the figure. As shown, it is inserted between the light transmitting plate 3 and the suppressing plate 9 from the side of the pivot 7, and is superimposed on the thermal copying sheet S on the light transmitting plate 3. The original sheet D is inserted until its leading edge touches the vicinity of the edge of the pressing plate 9 or the rubber plate 11 (J). The insertion amount is determined appropriately, and the original sheet is positioned.

After the original sheet D is inserted, the light source box 1 rises from the non-squeezing position as shown in FIGS. 1 and 2 toward the nipping position as shown in FIG. 3. At this time, the light source box 1 moves upward while pushing up the pressing plate 9, that is, rotating the pressing plate 9 around the pivot 7 in the direction of o'clock 11 in the figure. In the clamping position, the rotation of the suppression plate 9 in the clockwise direction in the figure is restricted by the suppression plate support member 6, so that the pressure plate 9 faces the light transmission plate 3, and the pressure plate 9 faces the light transmission plate 3. The pressing plates 9 are in close contact with each other over the entire surface thereof, with the polymer of the thermal copying sheet S and the original sheet D interposed therebetween. At the pinching position as described above, the light source 4 emits light, exposure is performed, and copying is performed in a thermal manner.

When one exposure is completed, the light source box 1 starts to be lowered from the clamping position to the non-clamping position (J). The light transmitting plate 3 is placed between the portion 10 and the thermal copying sheet 1-8.
It hangs down while in contact with the upper surface of, that is, it rotates around the pivot 7 in the counterclockwise direction as shown in the figure. At this time, the width of the original sheet D is smaller than the width of the thermal copying sheet S, and the thermal copying sheet S directly contacts the pressing plate 9 at its both side edges, and that part of the thermal copying sheet S is exposed to the pressing plate 9. Even if the light transmitting plate 3 and the press plate 9 are attached to each other, the light transmitting plate 3 and the press plate 9 are gradually separated from each other from the pivot end side of the press plate 9 as the light transmitting plate 3 is lowered. The stripping is also done gradually, thereby avoiding damage to the thermal copying sheet t-S.

When one exposure is completed, the polymer of the thermal copying sheet S and the original sheet D is transferred by a predetermined amount, but at this time, the original sheet D is stuck to the thermal copying sheet S by thermal copying. As the thermal copying sheet S moves, the original sheet D pushes up the edge 10 of the pressing plate 9 and the rubber plate 11 and moves, and the next copying area of the original sheet D is positioned on the light transmitting plate 3. -becomes like that.

4 and 5 show another embodiment of the thermal copying apparatus according to the present invention. In FIGS. 4 and 5, parts corresponding to those in FIGS. 1 to 3 are designated by the same reference numerals as those in FIGS. 1 to 3. In such an embodiment, the suppression plate 9 holds the original sheet D at its intermediate portion.
The pivot 7 extending along the axis perpendicular to the direction of insertion of the

. 9□ Supported rotatably around one axis. The pressure plate 9 is biased counterclockwise in the figure by a tension coil spring 14 installed between one edge thereof and the pressure plate support member 6, and as shown in FIG. When the transmitting plate 3 and the pressing plate 10 are in the non-squeezing position where they are separated from each other, one edge 10 is brought into contact with the upper surface of the light transmitting plate 3.

Therefore, in the embodiment shown in FIGS. 4 and 5, the same effects as in the embodiment shown in FIGS. 1 to 3 can be obtained.

In the above-described embodiment, the pressing plate is pivotable, but in the thermal copying apparatus according to the present invention, the light transmitting plate or the entire light source box may be pivotable. Both the pressing plate and the light transmitting plate or the light source box may each be pivotable.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited thereto.
It will be apparent to those skilled in the art that various embodiments are possible within the scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the thermal copying apparatus according to the present invention, and FIG. 2 is a vertical cross section showing the thermal copying apparatus according to the present invention shown in FIG. 1 in a non-squeezed state. 3 is a longitudinal sectional view of the thermal copying apparatus according to the present invention shown in FIG. 1 in a clamped state, and FIGS. 4 and 5 are another embodiment of the thermal copying apparatus according to the present invention. FIG. 4 is a vertical cross-sectional view showing the non-squeezing state, and FIG. 5 is the nipping state. DESCRIPTION OF SYMBOLS 1...Light source box, 2...Light irradiation window, 3...Light transmission plate, 4...Light source device, 5...Anti-OA mirror, 6...
- Suppressing plate support member, 7... Pivot, 8... Rocking lever, 9... Pressing plate. 10... Edge, 11... Rubber plate, 12... Cam,
13... Brown 1~. D...Manuscript sheet, S...
・Thermal copying sheet patent applicant: Riso Kagaku Kogyo Co., Ltd. Representative: Masatake Akashi, patent attorney Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a thermal copying apparatus that selectively presses and exposes a polymer of an original sheet and a thermal copying sheet inserted between the light transmitting plate arranged in a light irradiation window and a pressing force, the above-mentioned method is used. At least one of the light transmitting plate and the suppressing plate is rotatably supported by a pivot extending along an axis perpendicular to the insertion direction of the polymer, and the light transmitting plate and the suppressing plate are pulled together. A thermosensitive copying apparatus configured such that an edge of one of the light transmitting plate and the suppressing plate comes into contact with the other when the light transmitting plate and the suppressing plate are separated and not pressed.