JPH0640195Y2 - Sheet aligning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet aligning device suitable for application to a device for binding a large number of rectangular sheets, which are easily charged with static electricity and are sticky, with their end faces aligned.

In many conventional sheet aligning mechanisms of this type, as shown in FIG. 1, for example, a large number of sheets 1 are pressed against a stopper 2 on a reference surface by a shift plate 3 to align the end surfaces of the sheet 1. If there is a variation in the outer dimensions, the end faces will not be lined up cleanly, and if precise positioning is required, it is unsuitable.

On the other hand, even if the outer dimensions of the sheet vary, as shown in FIG.
The reference surface 2 is provided only on one of the vertical and horizontal end surfaces of the sheet 1, and a large number of sheets 1 are stacked on the table 5, and the vibrator 1 vibrates the sheet 1.
Although there is an automatic paper aligning device that aligns the end faces of the sheets, the sheets that can be handled here are limited to those with relatively low stickiness that the surface of the sheet is relatively dry such as paper, and like plastic sheets, it is easy to be charged with static electricity and sticky. For some sheets, there are often shortcomings in that they take a long time to align, or the entire end faces are not aligned.

In view of such a point, the present invention is mainly intended to propose a sheet aligning device that can accurately align the sheets on the end faces of the sheets even if the sheets to be handled are made of a sticky material or the outer dimensions of the sheets vary. And

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

FIG. 3 is a diagram showing an example of the present invention. In the first stage for preliminarily stacking the sheets, the sheets 1 are fed one by one to the positioning table 5 from this position. Pre-loaded sheets 1 are pick and place units
Elevator table 11 so that it can always be adsorbed by 10
It is placed on top of and moves up and down. The pick-and-place unit 10 is adjusted so that the four vacuum pads 15 are located at the front and upper positions of the four corners of the sheet 1, and the sheet 1 is conveyed from the position of the elevator table 11 to the position of the positioning table 5. It reciprocates vertically and horizontally as described above.

In the second stage for positioning with the positioning table 5, the stopper 6 to be the reference plane of the sheet 1 and the position in the direction parallel to the reference plane are determined on the surface of the positioning flat plate 5 which is inclined in the diagonal direction. A positioning pin 7 is provided for this purpose. The positioning pin 7 is adapted to move in the vertical direction. Further, in the direction in which the stopper 6 and the positioning pin 7 are positioned, the sheet 1
Each of them is provided with a sheet shifting mechanism 8 for moving the sheet to a reference position. Further, the electric binding machine 9 for binding the aligned sheets 1 is provided at both ends of one side taken as the reference plane.
Are attached in two places.

In the next third stage, the sheets 1 bound by the binding machine 9 are discharged from the positioning table 5.

Next, the operation process will be described. FIGS. 4A and 4B are diagrams showing the process of dropping from the pick and place unit 10 to the inclined table 5. The sheet 1 whose four corners are adsorbed by the four vacuum pads 15 of the pick and place unit 10 comes right above the positioning table 5 in the state shown in FIG. Next, by continuing the vacuum of only the vacuum pad 15a located on the inclined upper portion of the inner table 5 of the vacuum pad 15 and releasing the vacuum of the other three vacuum pads, as shown in FIG. When a state close to the inclination of the table 5 is obtained, and then the vacuum of the vacuum pad 15a is also released, the sheet 1 begins to fall while keeping the inclination, and at the same time, the air obtained by the sheet 1 and the table 5 on the table 5 The layers move so as to reduce the friction between them, and the sheet 1 slides on the surface of the table 5 and continues to slide until it comes into contact with the reference stopper 6 and the positioning pin 7, and is positioned.

On the other hand, FIG. 5 is for explaining the sheet shifting mechanism 8 for moving the sheet 1 to the reference position. The sheet 1 placed on the positioning table 5 with the positioning still incomplete is stopped by the sheet shifting mechanism 8 to the stopper 6
It is structured so as to be pulled in until it hits the end surface of the sheet 1, and the sheet 1 at the tip of the sheet shifting mechanism 8
It is assumed that the portion 13 for hooking is made of rubber in order to keep the frictional force with the seat 1.

As shown in FIG. 5, the sheet shifting mechanism 8 has a stopper 6 and a positioning pin 7 to serve as a reference, as shown in FIG.
Since they are attached in the directions marked with, they serve to further ensure the positioning of the sheet after the free fall of the sheet 1.

In FIG. 3, the above operation is repeated several times, and several sheets aligned on the basis of the end face of the sheet are bound by the electric binding machine 9 at two positions of the sheet, and the positioning pin 7 is retracted downward, The bound sheets 1 are discharged to the third stage position by a separate means.

Now, since the sheet 1 is positioned by the stopper 6 and the positioning pin 7 for abutting, the sheet 1 can be aligned on one end surface of the sheet 1 even if the outer dimensions of the sheet 1 vary. Further, since the sheet 1 slides due to the air layer generated between the sheet 1 and the table 5, even a sticky sheet due to static electricity or the like like a plastic sheet,
It can be positioned relatively smoothly. Further, the pick-and-place unit 10 allows the horizontally arranged sheets to be instantly slanted depending on how to release the vacuum of the four vacuum pads 15, so that the sheet can be conveyed. It will be possible with a relatively simple structure.

Therefore, the sheet aligning device according to the present invention is applied as a preliminary stacking device for work in which several sticky sheets such as PET sheets are conventionally stacked and punched, and when cutting is performed, the sheets are manually aligned and stacked one by one. it can.

As described above, according to the present invention, an inclined positioning table provided with a reference surface on one side and a positioning pin at one point,
Of the plurality of vacuum pads, pick and place unit provided with a transfer vacuum pad for releasing the suction of the transferred sheet at an angle by releasing suction other than the vacuum pad corresponding to the inclined upper part of the inclined positioning table,
Since it is composed of a sheet shifting mechanism that brings the transferred sheet end into contact with the reference plane and the positioning pin by friction of the actuator tip that expands and contracts in parallel with the inclined surface of the positioning table, the material of the sheet to be handled is sticky. Whether there is a sheet, a sheet that is easily charged with static electricity, or a sheet that has irregular outer dimensions, it is possible to provide a sheet aligning device that can accurately and reliably align one end of the sheet. Have.

[Brief description of drawings]

1 and 2 are views showing a conventional example, FIG. 3 is a perspective view showing an embodiment of the present invention, and FIGS. 4 and 5 are views for explaining respective actions. 1 ... Sheet, 5 ... Positioning table, 6 ... Stopper, 7 ... Positioning pin, 8 ... Sheet aligning mechanism, 10 ...
… Pick and place unit, 11 …… Elevator table, 15 …… Vacuum pad.

Claims (2)

[Scope of utility model registration request] 1. A tilted positioning table provided with a reference surface on one side and a positioning pin at one point, and a suction pad other than the vacuum pad corresponding to the tilted upper part of the tilted positioning table among the plurality of vacuum pads is released to be transferred. The pick-and-place unit provided with a transfer vacuum pad for obliquely dropping the sheet and the friction of the actuator tip that expands and contracts in parallel with the inclined surface of the positioning table make the transferred sheet end contact the reference surface and the positioning pin. A sheet aligning device, which is configured by the sheet shifting mechanism described above. 2. The sheet aligning device according to claim 1, wherein the actuator is configured to expand and contract from both the reference surface and the positioning pin.