JP2534426Y2 - Feeder for automatic flat plate punching machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a sheet feeding device in an automatic flat plate punching machine.

[0002]

2. Description of the Related Art As a paper feeder for feeding paper one sheet at a time to a punching section of an automatic flat plate punching machine, a paper feeder of a printing machine is commonly used.

In this paper feeder, the paper stacked on a pile stand is sucked one by one through air,
In general, the paper is sent in a shifted state, but it is necessary to correct the position of the paper sent out just before the printing or punching process.

[0004] This correction is usually made by monitoring the position of the paper end of the top one of the paper stacked on the pile base with a photoelectric converter. (See Japanese Utility Model Laid-Open Publication No. 1-176643).

[0005] However, since the paper supplied to the automatic flat-sheet punching machine has been subjected to processing such as printing and surface coating, it is affected by the action of printing ink and coating treatment agent.
For example, as shown in FIG. 3, each sheet on the pile table (a) is deformed, and the photoelectric converter (b) cannot accurately detect the position of the sheet edge (c) of the uppermost sheet. Inevitably, the correction of the shifted position becomes incomplete.

Further, the pile table is moved in the left-right direction while detecting the trailing edge of the paper sheet being conveyed from the pile table to the punching section via the register board by a plurality of photoelectric converters. Is also known (see Japanese Utility Model Application Laid-Open No. 60-1).
19046).

In this paper feeder, the correction error caused by the deformation of each paper sheet as described above is corrected to some extent, but is completely separate from the detection of the positional deviation performed at the rear end of the paper sheet. Since the lateral registration is performed at the front end of the sheet, the position adjustment based on the difference in deformation between the front end and the rear end of the sheet is not always completely performed. There is the inconvenience that two adjustment means for the converter must be provided.

[0008]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of easily correcting a positioning error caused by deformation of a sheet in such a conventional sheet feeding apparatus.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on an automatic flat sheet punching machine in order to improve the inaccuracy of alignment in a conventional apparatus for feeding paper. A horizontal registration device is installed at the tip of the register board, that is, at the end near the automatic flat plate punching unit, and a photoelectric converter is incorporated in the horizontal registration device to adjust the movement simultaneously with the detection of the front end of the paper in the horizontal direction. It has been found that the purpose can be achieved by adopting a structure that completes the above, and based on this finding, the present invention has been made.

That is, according to the present invention, a plurality of paper detecting means for detecting a side edge of a paper being conveyed toward a punching unit of an automatic flat plate punching machine, and a paper stacking pile table are moved in accordance with the detection result. In a paper feeder provided with a drive mechanism for moving and adjusting in the direction, the paper detecting means is provided in a horizontal registering device provided along a front end side edge of a paper reaching a front pad located immediately before a punching unit. It is intended to provide a paper feeding device characterized by being incorporated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. In FIG. 1, paper a on a pile board 1 passes over the upper surface of a register board 2 in a state of "shift and overlap" by a separation 8. Then, it is pushed up to the front pad 3,3. Then, in this way, the side edges of the paper that has reached the front contacts 3, 3 are converted into the photoelectric converters 5, 5 incorporated in the lateral register device 4.
6, the pile table 1 is moved in the left-right direction via a drive mechanism 7 including a motor 9, gears 10, 10 and a feed screw shaft 11, as shown in FIG. Can always assume a predetermined position.

[0012]

According to the present invention, the position detection by the photoelectric converters 5, 6 and the adjustment positioning performed in conjunction therewith are simultaneously completed, and there is no deviation between the two, so that the operation is accurate. In addition, since the position detection is performed with reference to the front end of the fed paper, the occurrence of errors due to the deformation of the paper can be suppressed, and efficient paper feeding can always be performed. In addition, since the photoelectric converter is provided integrally with the horizontal registering device, the structure is simple.

[Brief description of the drawings]

FIG. 1 is a plan view

FIG. 2 is an explanatory view of the drive mechanism of the present invention.

FIG. 3 is a side view showing a state of a conventional paper sheet.

[Explanation of symbols]

 1: pile board 2: register board 3: front contact 4: lateral register device 5, 6: photoelectric converter 7: drive mechanism 8: separation

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of paper detecting means for detecting a side edge of a paper being conveyed toward a punching unit of an automatic flat plate punching machine, and a paper stacking pile table is moved in a horizontal direction in accordance with a result of the detection. In the sheet feeding device provided with a driving mechanism, the sheet detecting means is incorporated in a lateral registering device provided along a front edge of a sheet reaching a front pad located immediately before the punching section. A sheet feeding device, characterized in that: