JPS63147768A - Sheet stacking device - Google Patents

Abstract

PURPOSE:To prevent turbulence in sheets during container transport by installing upright a front plate at the front of the bottom plate of container to be placed upon an exhaust tray, and allowing it to serve as an alignment stopper. CONSTITUTION:Several types of containers 21 are provided according to sheet sizes. The container 21 shall take the form of a box opened at the rear and top, and grips 22 are fixed to both side plates. A front plate 23 is installed upright at the front to be used as an alignment stopper. At the bottom plate a pair of legs 25 are installed for engaging with an exhaust tray, and magnets 27, 28 are furnished mating with a container size sensing switch, which is installed at the tray. The legs 25 are engaged with a detect hole in the exhaust tray, and the magnets 27, 28 sense the size of sheets, which are fed in and stopped at the front plate 23 to be aligned. This prevents sheets from turbulence otherwise likely to occur when the container 21 is transported.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a sheet stack that stacks a large amount of sheets discharged from copying devices such as printers and copying machines, and that ensures the handling of the stacked sheets. Regarding equipment.

"Prior Art" FIG. 5 shows a conventional sheet stacking device that stacks a large amount of sheets. The paper discharge tray 1 is placed on top of a plurality of support rods 2 that are vertically movable. A sheet 3 conveyed from a copying apparatus is discharged onto a paper discharge tray 1 via a pair of discharge rolls 4, and its leading edge abuts against a wall surface 5a of an alignment stopper 5 for alignment. When the stack amount of sheets on the paper discharge tray 1 increases by an appropriate amount, the support rod 2 and the paper discharge tray 1 are lowered by a predetermined amount.

The container 6, which is box-shaped and open at the top, has a step 8 formed by providing a hole 7 at the bottom, and the paper discharge tray 1 is arranged inside the container 6 as shown in FIG. It is installed in the sheet stacking device in this way. When a predetermined amount of sheets 3 are stacked on the paper output tray 1, the paper output tray 1 is locked to the stepped portion 8 and loaded from the container 6 using an auxiliary device (not shown), as shown in FIG. Take out the sheet 3.

"Problems to be Solved by the Invention" In the conventional sheet stacking device described above, the container 6 only functions as a container for conveying sheets, and when the container 6 is taken out from the stacking device or conveyed, the sheet 3 There was a problem in that the sheet 3 was disturbed and handling of the sheet 3 after being taken out from the container 6 was troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet stacking device that prevents sheets from being disorganized and facilitates handling of sheets discharged into a container.

"Means for Solving the Problems" The sheet stacking device of the present invention uses a front plate erected at the front of the bottom plate of the container as an alignment stopper that can align the leading ends of the sheets, and stacks the sheets on the container itself. It also functions as a matching stopper. This makes it possible to directly take out and transport the sheets stacked in the container placed on the paper output tray without disturbing them.

"Example" An embodiment of the present invention will be described below based on the drawings.

In FIGS. 1 to 3, a paper discharge tray 11 of a sheet stacking device has guide rails 1 provided at the front and rear thereof.
2.13 to a suitable frame 14.15 so as to be able to move laterally, and a pair of engagement holes 16 are bored in the front of this paper ejection tray 11 for positioning a container, which will be described later. has been done. A pair of alignment stoppers 17 are provided at the front of the bottom plate 11a of the paper discharge tray 11 so as to be movable back and forth, and are used to align sheets on the paper discharge tray 11 when the container is not used. Paper output tray 11
A pair of reed switches 18 and 19 for detecting the size of the container are embedded in one side of the bottom plate 11a.

In FIG. 2, the container 21 is made of a box that is open to the rear and upward, and handles 22+ for gripping the container 21 are provided on both sides of the box. At the front of the container 21, an alignment stopper 23 formed by integrally erecting a front plate is erected. It is functioning. Bottom plate 2 of container 21
1H has a pair of legs 25 for engaging the container 21 with the paper discharge tray 11, and the reed switch 18.
A pair of magnets 27 and 28 for container size detection, which can be opposed to 19, are provided respectively.

In FIG. 1, a sheet 24 conveyed by a conveyance device (not shown) is discharged onto a paper discharge tray 11 by a pair of paper discharge rolls 29. As shown in FIG. When the container 21 is not used, the position of the alignment stopper 17 shown in FIG. 3 is set according to the size of the sheet 24 to be discharged. At this time, by reading the position of the alignment stopper 17 using a microswitch (not shown), it is detected whether or not the alignment stopper 17 is set at the correct position.

A plurality of containers 21 are prepared corresponding to the sizes of the sheets 24, and when the container 21 is used, the container 21 of a predetermined size engages its legs 25 with the engagement holes 16 of the paper output tray 11. is set. During this setting, the size of the container 21 is read by the correspondence of the magnet 27.28 of the container 21 to the reed switch 18.19. For example, the size of the container 21 is automatically detected by selectively operating the reed switch 18, 19 depending on whether one or both of the magnets 27, 28 of the container 21 are present. .

When there is an input to reed switch 18, 19, or one of them, it is determined that container 21 is in use, and the action of a microswitch (not shown) that detects the position of alignment stopper 17 is canceled. When the stacking of the sheets 24 into the container 21 is completed,
After the sheet discharge tray 11 is moved laterally toward the operator, the handle 22 of the container 21 is grasped, the container 21 is taken out from the sheet stacking device, and transported to a desired location. During this transportation, the leading edge of the sheet 24 is aligned by the front plate 23, so that the sheet 24 is prevented from being disturbed.

FIG. 4 shows a modified example of the container.

A buffer stopper 33 made of sponge, urethane, or the like is provided on the inner surface of the alignment stopper 32 made of the front plate of the container 31. Depending on the type of sheet 24 to be ejected (particularly in the case of thick paper), in the container 21 of FIG. In this case, the force of the sheet 24 is absorbed by the buffer stopper 33, and paper alignment accuracy is ensured.

"Effects of the Invention" As explained above, according to the present invention, by using the front plate of the container placed on the paper ejection tray as an alignment stopper, when transporting a large number of ejected sheets, etc. It is possible to prevent the sheet from being disturbed.

[Brief explanation of the drawing]

Fig. 1 is a side view of a sheet stacking device showing an embodiment of the present invention, Fig. 2 is a perspective view of a container, Fig. 3 is a perspective view of a paper output tray, and Fig. 4 is a perspective view showing a modified example of the container. figure,
Fig. 5 is a longitudinal cross-sectional side view of a conventional sheet stacking device;
The figure is a vertical sectional side view showing a sheet stack state of a conventional container. 11... Paper output tray, 16... Engagement hole (engaging portion), 17.18... Reed switch, 21...
...Container, 22...Handle, 23...
・Alignment stopper, 24...Sheet, 25...
... Leg part (engaging part), 27.28 ... Magnet, 31 ... Container. Applicant Fuji Xerox Co., Ltd.

Claims (1)

[Scope of Claims] 1. In a sheet stacking device in which a container for storing sheets ejected from a copying device can be removably attached to a paper output tray, a front plate is provided upright in front of a bottom plate of the container. A sheet stacking device characterized in that the above is an alignment stopper capable of aligning the leading ends of the sheets. 2. The sheet stacking device according to claim 1, wherein the paper discharge tray and the container each have an engaging portion that allows containers of different sizes to be positioned on the paper discharge tray.