JPH08319053A - Paper discharge tray - Google Patents

Abstract

PURPOSE: To prevent a setoff and blocking by receiving printing paper not dried by a low position downward a printing machine main unit. CONSTITUTION: An opening frame part 1 is wide opened toward a discharge port of a printing machine, further to provide side frame parts 3 opposed to both sides of a bottom surface part 2 with a surface total unit formed in a recessed surface shape. An upper frame part 4 having a grip part 5 is mutually mounted in an upper edge of the side frame part 3. In this way, a setoff and blocking, in drying unfinished printing paper P transfer fed from the discharge port of the printing machine, are prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper discharge tray mounted on a printing machine such as a stencil printing machine or a small offset printing machine, and more specifically, a non-dried printing paper is placed at a lower position below the main body of the printing machine. It is a paper ejection tray that takes into consideration the prevention of set-off and blocking.

[0002]

2. Description of the Related Art Conventionally, in the case of a stencil printing machine and an offset printing machine, the paper that has passed through the printing and drying section is processed through a discharging device, and the discharged paper is transported and arranged. As a type, a tilting device is used for simple machines (manual feeders), and a chain feed device (chain delivery system) is used for many relatively small low-speed machines. Has adopted pile delivery. In the chain feed device and the pile delivery device, when the next printed paper is stacked before the ink of the previously printed paper is dried, the ink of the preceding paper adheres to the back surface of the succeeding printed matter. There is a problem of so-called set off, which causes stains, and the causes thereof include the speed of paper feeding, the weight of paper, the number of sheets stacked, and the state of ink drying.

Therefore, as a countermeasure for set-off prevention, (a) picking up sludge (child cage), (b) air spray method, (c) electrostatic spray method, (d) liquid spray method, (e) interleaving paper (aid), etc. It has been known. The above (b) is for spraying powder (fine powder) of spray powder (organic or inorganic) on the printing surface, which is effective in preventing set-off and enables sticking and paper alignment. On the other hand, it is said that it is not suitable for high-quality paper, and it has been pointed out that there is a problem of environmental pollution in the factory. Also, (c) and (d) do not scatter the powder in the factory because the powder does not scatter, but it is expensive in terms of economics such as equipment cost, and (e) is troublesome and complicated. is there.
In contrast to (b) to (d) above, in (a) above, as the printed sheets are piled higher, set-off occurs due to the weight of the printed sheets. It is a method of separating so as to reduce it, and a slatted plate material or a shallow box is used. As a result, the circulation of air is improved, which also helps dry the ink.

[0004]

Since the sludge removal has the above-mentioned effects and the structure is simple, its utilization is expected in the future. However, conventional sludge removal is
Although suitable for use in printing machines such as printing factories, it is not suitable for use in stencil printing machines and small offset printing machines used by general users in offices, etc. in terms of its structure, form and effect, There are unsolved problems, including blocking measures. In addition, there has been a long-felt need for improvement in the removal of sludge as a peripheral device of a printing machine ("Printers Circle" March special issue, actual knowledge of printing system. Published on March 25, 1982. Published and published by Japan Printing Technology Association.
6-127).

Therefore, in the case of a general stencil printing machine or a small offset printing machine, a stencil plate having a proper discharge load capacity and equipped with a slide mechanism corresponding to the size of the printing paper is mounted, and As shown in FIG. 4, there is proposed a plate discharge table equipped with a paper alignment plate which is also called a "domino mechanism". It is installed at a position lower than the take-up cylinder inside the small offset printing machine, and as the sheets are sequentially ejected, the succeeding sheets have a cushioning effect and a cushioning effect provided by the sheet aligning plate with respect to the preceding sheets. Due to the separation effect, it has a practical advantage in that it is pushed down, dropped, and stacked with a small gap.

However, the plate discharge table remains fixed and mounted on the printing machine during printing, and it is necessary to interrupt the printing operation each time to take out the stacked paper discharge sheets. There is a problem in that it cannot be taken out unless it is held up by a hand, and moreover, if the printing paper is misunderstood, a part of the paper will be misaligned and set back. Therefore, in order to prevent the set-off, it has been a serious bottleneck that careful work is required and work efficiency is poor. It is an object of the present invention to provide a sheet discharge tray which can prevent settling of undried printing paper and blocking thereof and which has a simple structure and is easy to handle, which is economical and has a good appearance.

[0007]

The structure of the discharge tray according to the present invention for achieving the above object will be described in detail. A discharge tray mounted on a plate discharge tray provided at a position below a discharge opening of a main body of a printing machine. In the paper tray, the opening frame part is widely opened toward the discharge port, and side frame parts are provided opposite to each other on the bottom surface part whose entire surface is concave, and the upper edges of the side frame parts are bridged to each other. The upper frame portion having the grasping portion is formed.

[0008] A discharge tray mounted on a plate discharge table provided at a position below the discharge port of the main body of the printing machine, wherein the opening frame portion is wide open toward the discharge port, and A concave part is formed on the opposite side, side frame parts are provided opposite to each other on the bottom surface part where the entire surface is a concave shape, and an upper frame part having a grasping part laid on the upper edges of the side frame parts is formed. Moreover, the front side frame portion may be provided with a space portion where the paper alignment plates formed on the inner surfaces of both side walls of the plate discharge table are exposed.

[0009]

Since the present invention has the above-described structure, as the undried printing paper is discharged from the discharge port of the stencil printing machine or the offset printing machine main body, a separate discharge apparatus installed below the above-mentioned area is discharged. It is possible to take out the paper discharge tray by gripping the grasping portion while the paper is stacked on the paper tray. Further, as shown in FIG. 4, when the guide plate G of the known plate discharge table E is provided with the paper aligning plate K, the plate can be exposed in the space portion, so that the offset and blocking of the paper can be prevented. To do.

[0010]

EXAMPLES Next, examples of the present invention will be described.
FIG. 1 is a perspective view showing a paper discharge tray as one embodiment of the present invention, FIG. 2 is a perspective view of the paper discharge tray as viewed from the rear, and FIG. 3 is an undried printing paper on a plate discharge stand of a conventional small offset printing machine. Shows a state in which they are stacked on each other, and FIG. 4 is an explanatory view of a state in which the sheet discharge tray of the present invention is not placed, and FIG. 4 is an explanatory diagram of a plate discharge table having a sheet aligning plate.

First, the paper discharge tray shown in FIGS. 1 and 2 will be described. As shown in FIG. 1, the paper discharge tray T is placed on a plate discharge table provided below the discharge port for discharging undried printing paper from the main body of a printing machine such as a small offset printing machine. Reference numeral 1 is an opening frame portion that is wide open toward the discharge port, 2 is a bottom surface portion whose entire surface is concave, 3 is a side frame portion opposite to both sides of the bottom surface portion 2, and 4 is the side frame portion 3
It is an upper frame portion having a grasping portion 5 which is laid across the upper edges.

The paper discharge tray T of the present invention is preferably made of all plastics. As shown in FIGS. 1 and 2, for example, the side frame part 3, the bottom face part 2, the side frame part 3, and the upper frame part 4 are folded. It suffices to form them in a continuous state in a band shape via the above, and fix the upper frame portion 4 side end and the side frame portion 3 side end by known means. Further, the bottom surface portion 2, the side frame portion 3, and the upper frame portion 4 may be formed by being fixed to each other, or may be integrally formed, and any of them may be used as long as desired dimensional accuracy is observed. . In the drawings, the bottom portion 2 is illustrated as being formed in the shape of a shallow dish, but it may be formed in a gently curved shape, and the point is that the shape is particularly limited if there is no problem in orderly stacking printing paper on a stick. Not something to do.

In FIG. 3, M is a printing machine such as a small offset printing machine, E is a stencil plate, and P is undried printing paper. The drawing shows a position below the discharge port of the conventional small offset printing machine M. It shows a state in which a plate discharge table E having guide plates G on both sides is fixed, and undried printing paper P is stacked on the plate discharge plate E. Further, instead of directly stacking the undried printing paper P on the upper surface of the plate discharge table E, a state immediately before placing the paper discharge tray of the present invention is illustrated. S is a stopper that keeps the undried printing paper P stacked on the sticks in order and has a cushioning function. Therefore, the paper discharge tray of the present invention is sandwiched between the guide plates G and placed in contact with the stopper S. In view of the configuration of the present invention, the bottom surface portion 2 may be formed with a recess 6 on the side opposite to the opening frame portion 1 so as to be compatible with the stopper S. Reference numeral 7 denotes a space portion formed in the side frame portion 3. When the discharge tray of the present invention is placed on the plate discharge table E having the paper alignment plate K, the plate K is exposed inward through the side frame portion 3. It is meant to be put out.

[0014]

Since the present invention is constructed as described above, it brings about the following effects. The discharge tray T of the present invention according to claims 1 and 2
Is placed on the plate discharge table E of the main body of the offset printing machine M, and when the appropriate number of sheets are stored in the tray, the grasping portion 5 is grasped, the tray is taken out as it is, and the tray is replaced with another sheet discharge tray. Printing can be continued immediately after the operation. Therefore, when the appropriate number of prints are continuously stored in the tray after replacement, the prints in the previous tray are already dry, so take them out and replace the trays again to print again. Can perform various tasks efficiently. In addition, since the entire surface of the bottom surface portion 2 has a concave shape, curling is suppressed for an appropriate number of undried sheets of paper P that are accustomed to them and curl is prevented at the same time, and at the same time, they are taken out. After that, good results are obtained also when "scattering" is performed to confirm or eliminate the close contact between the sheets. The term blocking here means
It means that the printing papers in the overlapping state are adhered by the ink. According to the second aspect of the present invention, the space portion 7 is formed in the side frame portion 3 so as not to impede the effect of the plate when it is mounted on a known plate discharge plate equipped with a paper alignment plate, and Stopper S of the plate discharge table E
By providing the concave portion 6 so as not to get in the way, the work can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sheet discharge tray as an example.

FIG. 2 is a perspective view of the discharge tray as viewed from the rear.

FIG. 3 is a diagram illustrating a state in which undried printing paper is stacked on a plate discharge tray of a conventional small-sized offset printing machine, and an explanatory view of a state in which the discharge tray of the present invention is not placed on the plate.

FIG. 4 is an explanatory diagram of a plate discharge table including a paper alignment plate.

[Explanation of symbols]

 E Plate ejection table G Guide plate K Paper alignment plate M Printing machine such as a small offset printing machine P Undried printing paper S Stopper T Paper ejection tray 1 Opening frame 2 Bottom part 3 Side frame 4 Top frame 5 Grasping part 6 Recess 7 Space

Claims (2)

[Claims] 1. A discharge tray mounted on a plate discharge table provided at a position below a discharge port of a printing machine main body, wherein an opening frame portion is wide open toward the discharge port and the entire surface is concave. And a side frame portion oppositely disposed on both sides of the bottom surface portion, and an upper frame portion having a grasping portion laid between the upper edges of the side frame portions is formed. 2. A discharge tray mounted on a plate discharge table provided at a position below a discharge port of a printing machine body, wherein an opening frame portion is wide open toward the discharge port, and A concave portion is formed on the opposite side, side frame portions are provided on both sides of the bottom surface portion having a concave surface as a whole, and an upper frame portion having a grasping portion that bridges the upper edges of the side frame portion is formed. Moreover, the paper discharge tray, wherein the side frame portion is provided with a space portion where the paper alignment plates formed on the inner surfaces of both side walls of the plate discharge table are exposed.