JPS63176229A - Paper supply device of sheet printing press - Google Patents

Abstract

PURPOSE:To automatically set a cross piece under a broach by providing a guide claw for guiding the cross piece descending on a main track to a bypass track on the upper end of bypass track. CONSTITUTION:When remaining blanks 1 stacked on a pallet 10 on a main pile 2 become few and the main pile 2 reaches a certain height, a cross piece 5 standing by above begins automatically to desend by the operation of an auxiliary pile driving motor. This cross piece 5 is guided by a main rail 8 to descend, guided into a bypass rail 9 by a guide claw 11, lowered through said rail 9 and avoids the collision with the broach 4. Then, the cross piece 5, after turning around below the broach 4 and entering the main rail 8, is lifted in the main rail 8 by the reversal of said motor to hold the broach 4 and stopped when it contacts the broach 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper feeding device for a nine-sheet-fed printing press, and in particular to a non-stop paper feeding device that can feed paper without stopping printing in a sheet-fed printing press. Regarding.

[Conventional technology]

Conventional 9-sheet-fed printing presses have paper feeding devices that feed stacked printing paper (
It has a pile that rises with blank paper (hereinafter simply referred to as blank paper), and as this pile rises, the topmost blank paper is fed one after another to the printing section. When the paper feed is finished and the first blank paper is to be used, printing is temporarily interrupted, the pile is lowered, and the next blank paper is placed on top of the pile.

However, such conventional devices have a problem in that printing must be interrupted when switching piles.

A so-called non-stop paper feeding device has been developed to solve this problem. This non-stop paper feeder feeds when the remaining blank paper on the main pile is running low.

Insert a skewer under this blank paper, support both ends of the skewer with the crossbars that make up the auxiliary pile, and continue printing while automatically raising the auxiliary pile while lowering the main pile.
The structure is such that blank paper previously stacked on top of the pile is brought in, the main pile is raised by a drive motor, it is docked with the remaining paper supported by skewers and crossbars, and the skewers can be removed to connect the piles. Ta.

[Problem that the invention seeks to solve]

However, in such conventional non-stop paper feeding devices, most of the above operations are performed by humans, which requires constant operation for a long time, from the point when there are few blank sheets left in the main pile to the time when the skewer is removed and the old and new piles are connected. Therefore, there was a problem in that a dedicated worker was required in the paper feeding section of the printing machine.

Therefore, it is desired to automate the work of connecting old and new piles in a nonstop paper feeder. The work that nine workers are currently doing by hand includes inserting skewers under the blank paper on the main pile, setting crossbars under the skewers,
There is work to take out empty baleno NJD on the main pile, carry in blank paper, raise and lower the pile, and remove skewers.

In this process, skewering and skewering are the most important operations that connect the old and new piles.If the top surface of the pile fluctuates significantly during skewering, the machine will stop due to a single paper feed failure, making it impossible to take advantage of the non-stop feature. . For this reason.

Automation of this work is difficult, and the only option is to rely on workers who are accustomed to the work to some extent.

Next, the work of discharging empty pallets and carrying in blank sheets can be automated by using technologies such as roller conveyors, belt conveyors, automatic transport vehicles, etc.

In addition, the work of lifting and lowering piles is also possible with current printing machines.

It has a remote control function that operates the pile lift motor, and by linking it with the above-mentioned automated device for discharging empty pallets and carrying in blank paper, it is possible to automate the lowering of the main pile when empty pallets are discharged and the raising of the main pile after carrying in blank paper. be.

The work to set the remaining crosspieces is to set the crosspieces waiting above the feeder under the skewers inserted under the blank paper on the main pile that is rising, and two workers recognize the position of the skewers. It was difficult to automate this as it required the work of moving the skewer under the skewer while avoiding it so as not to hit the skewer. It is no exaggeration to say that this work required a full-time worker to operate the nonstop paper feeding device.

The present invention has been made in view of the current situation, and the crossbars waiting above the skewers that are held by the main pile and are rising automatically descend to the bottom of the skewers without colliding with the skewers. An object of the present invention is to provide a paper feeding device for a sheet-fed printing press configured to allow cents.

[Failure to solve the problem]

The present invention, which has been made to achieve the above object, consists of a main pile on which blank paper to be printed is placed, a main pile lifting device for raising and lowering the main pile, and an auxiliary pile consisting of crossbars that hold both ends of a skewer that supports the blank paper. and an auxiliary pile elevating device for raising and lowering the auxiliary pile, in which the skewer is located at a predetermined position on a part of the main track that guides both ends of the crosspiece of the auxiliary pile. Summary of a paper feeding device for a sheet-fed printing press, characterized in that a bypass track that can be lowered without contact is provided, and a guide claw is provided at the upper end of the bypass track to guide a crosspiece descending from the main track to the bypass track. shall be.

[Effect]

According to the device with the above configuration, when the main pile is raised with the crosspiece in the upper standby position and the skewer held by it reaches a predetermined position, the crosspiece is lowered, and the crosspiece follows the royal track. It descends and then enters the bypass track by means of guide pawls, passes outside the skewer held by the main pile and enters the main track below the skewer. Therefore.

By then raising the crosspiece through the main track.

The skewer can be easily positioned to a position where it is held from below, and it is possible to automate the work of placing the crossbar under the skewer.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a non-stop paper feeding device for an off-cent sheet-fed printing press to which the present invention is applied, and FIGS. 2A and 2B are enlarged perspective views of the guide rail portion of the crossbar used in the device. Indicates operating condition. In the figure, the non-stop paper feeding device includes a main pile 2 on which blank paper 1 to be printed (see Fig. 2A) is placed, a main pile lifting chain 3 for lifting and lowering this main pile 2, and a main pile drive motor (
and a main pile lifting device consisting of (not shown).

It consists of an auxiliary pile consisting of crosspieces 5, 5 that hold both ends of the skewer 4 supporting the blank paper, an auxiliary pile lifting chain 6 and an auxiliary pile drive motor (not shown) that lift and lower the crosspieces 5.5 of the auxiliary pile. It has an auxiliary pile lifting device and a motor changeover switch 7 for switching between the main pile drive motor and the auxiliary pile drive motor. On both sides of each crosspiece 5, a main track or main rail 8 for vertically guiding the crosspiece 5 is provided, and a part thereof is provided with a bypass track or bypass rail 9.
is connected. As shown in FIG. 2A, this bypass rail 9 prevents the crossbars 5 from coming into contact with the skewers 4 inserted at predetermined positions between the pallet 10 placed on the main pile 2 and the blank paper 1 thereon. It is located in a position where it can be lowered.

Furthermore, a guide pawl 11 is provided at the upper end of the bypass rail 9 to guide the crosspiece 5 descending from the main rail 8 above into the bypass rail 9. This guide claw 11 is the pin 1
2, the guide pawl 11 normally occupies the position shown in FIG. 2A, and guides the crosspiece 5 descending from above into the bypass rail 9. When the crosspiece 5 rises on the main rail 8 below.

It is opened by the horizontal bar 5 so that the horizontal bar 5 does not interfere with the rising of the horizontal bar 5. Note that the guide claw 11 may be configured to be switched by an appropriate driving means 1 such as a solenoid or an air cylinder.

Next, the operation of the non-stop paper feeding device having the above structure will be explained with reference to FIG.

Figure 3 fat shows normal printing.
is raised holding the pallet 10 and blank sheets 1, and the blank sheets at the top are being supplied to the printing unit one after another. At this time,
A skewer 4 is inserted under the blank paper 1 on the upper surface of the pallet 10. Further, the cross members 5 of the auxiliary pile are waiting at the top. When the number of blank sheets 1 stacked on the pallet 10 on the main pile 2 is running low and the main pile 2 reaches a certain height (the position shown in FIG. When activated, it will automatically begin to descend. As is clear from FIG. 2A, this crosspiece 5 is guided down by the main rail 8, guided into the bypass rail 9 by the guide pawl 11, descended through this bypass rail 9, and collides with the skewer 4. is evasive. After that, after going under the skewer 4 and entering the main rail 8, the auxiliary pile drive motor is reversed.

It rises within the main rail 8 to hold the skewer 4, and stops when it comes into contact with the skewer 4 (see FIG. 3 fbl).

Simultaneously with the stop, the lifting of the blank paper 1 is switched from the main pile drive motor to the auxiliary pile drive motor, and the main pile 2 is lowered to the lowest end (see FIG. 3, FC+).

The blank paper 1 is automatically raised by the auxiliary pile drive motor,
Feed paper! As shown in Fig. 3fdl, (el), the empty pallet 10 on the main pile 2 was ejected from the machine, and the blank paper IA waiting near the main pile and the pallet IOA supporting it were removed. is inserted onto the main pile.

Note that this operation is performed by an automated device (not shown).

When the blank paper has been carried into the main pile, as shown in FIG. 3(f), the main pile 2 rises while holding the new blank paper IA, and stops at a predetermined height. When the lifting of the main pile 2 is completed, a lamp or an alarm notifies the operator that the series of operations that were performed automatically have been completed.

Therefore, worker 9 went to the paper feed section and, as shown in Fig. 3 The blank paper 1 that was on the pallet is placed on the blank paper IA below it, and the removed skewer 4 is placed in a predetermined position between the pallet IOA and the blank paper IA above it.

With this, one blank sheet transshipment operation is completed.

In addition, in the above embodiment, the baleno held in the main bail 2)
Although a bypass rail was used to avoid the skewer 4 on 10 and lower the crosspiece, it is also possible to use other structures. Figures 4 and 5 show an example of this.The middle support part of the crosspiece is equipped with a mechanism that allows it to move horizontally, and the middle support part of the crosspiece escapes horizontally just before the skewer and the crosspiece collide. collision was avoided. The crosspiece, generally indicated by the reference numeral 20, has a middle support part 21 and a body 22, with the middle support part 21 being held movable in the horizontal direction relative to the body 22. Furthermore, the main body 22 holds an air cylinder 23 for horizontally moving the middle support part 21. With this configuration, when the crosspiece 20 is lowered from above the skewer, the air cylinder 23 can move the middle support portion 21 to a position where it does not collide with the skewer.

FIGS. 6 and 7 show still other modifications.

A plurality of middle support members 32 are provided on the crossbar 31 in the width direction. When the middle support member 32 comes into contact with the rising skewer 33, it moves in the direction of arrow A shown in Fig. 2, allows the skewer 33 to pass through, and returns to its original position after iJ1, but the skewer 33 When placed on top, the skewer 33 can be supported without moving. This configuration also avoids collision with the skewer 33 when the crosspiece descends.

〔Effect of the invention〕

As explained above, the paper feeding device of the present invention (7) has a bypass track on a part of the main track that guides both ends of the crosspieces of the auxiliary pile so that the crosspieces can descend without coming into contact with the skewer at a predetermined position. Moreover, since it has a structure in which a guide claw is provided at the upper end of the bypass track to guide the crosspiece descending on the main track to the bypass track, simply lowering the crosspiece allows the crosspiece to be supported by the main pile. This has the effect that it is possible to position the skewer below the skewer without colliding with the existing skewer, and it is possible to automate the work of placing the skewer under the crossbar.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a paper feeding device of a sheet-fed printing press according to an embodiment of the present invention, FIGS. 2A and 2B are enlarged perspective views of the crossbar side part of the paper feeding device, and FIG. 2B shows the state before the crosspiece is set under the skewer, and FIG. 2B shows the state in which the skewer is supported by the crosspiece. FIG. 3 is a perspective view illustrating the blank sheet transfer operation in the paper feeding device, FIG. 4 is a perspective view showing a modification of the crossbar, FIG. 5 is an enlarged perspective view of the main part, and FIG. FIG. 7 is an enlarged perspective view of the main parts thereof. 1. LA-Ichishikami 2.-Raw pile 3.Main pile lifting chain 4-.Skewer 5-Horizontal 6.
...Auxiliary pile lifting chain 8...Main track 9...-Bypass track 10.1OA
--Palette 11-Guidance agent Patent attorney Matsu Nori
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Claims (1)

[Claims] A main pile on which blank paper to be printed is placed, a main pile lifting device that lifts and lowers the main pile, an auxiliary pile consisting of crossbars that hold both ends of a skewer that supports the blank paper, and an auxiliary pile lifting device that lifts and lowers the auxiliary pile. In the paper feeding device of a sheet-fed printing press, a bypass track is provided in a part of the main track that guides both ends of the crosspieces of the auxiliary pile so that the crosspieces can descend without contacting the skewer at a predetermined position, and A sheet feeding device for a sheet-fed printing press, characterized in that a guide claw is provided at the upper end of the bypass track to guide a crosspiece descending from the main track to the bypass track.