JPH04279230A - Intermittent feed device for metal sheet in press - Google Patents

Abstract

PURPOSE:To enable accurate punching and to prevent a sheet metal from breaking in an intermittent feeding device in a press. CONSTITUTION:In this punching press, a forward feed roller 6 and a backward feed roller 7 rotated intermittently by a servomotor 16 are provided respectively before and behind a punching die 5 and as a sheet metal 1 is fed by these forward and backward feed rollers 6, 7 intermittently to this punching die 5, plural working places of this sheet metal 1 are punched in sequence and before working places nearly in the center of this sheet metal 1 are punched by control means 25, the sheet metal 1 is fed by this forward feed roller 6, then, as the sheet metal 1 is fed by the backward feed roller 7, the elevating means 19, 20 on the front and rear sides are controlled so that the sheet metalis are punched. The sheet metal 1 can be prevented by unreasonable force given by the difference of peripheral speed between the forward feed roller 6 and backward feed roller 7 from being deflected and drawn.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent sheet feeding device for a press machine that performs various press operations such as punching, bending, and drawing.

0002

2. Description of the Related Art Generally, this type of device is installed in a punch press machine for processing resin sheets, etc., and is used, for example, as an intermittent sheet feeding device in a punch press machine for information storage cards. Information storage cards such as telephone cards and orange cards are made of insulating material such as plastic or paper, and one side of the card is coated with a magnetic material that serves as the information storage section, and various information is stored on this coated surface. At the same time, the other side is surface-treated and has color printed areas with various designs, landscapes, or solid colors to increase its commercial value. To manufacture this type of card, color printing areas and information storage areas are formed at equal intervals on a single insulating sheet, corresponding to multiple parts that are to become the card, and this sheet is attached to a belt. The sheet is transported to a punching die using a conveyor or other conveyance device, and then the sheet is intermittently fed by front and rear feed rollers installed before and after the punching die, and multiple processing points are sequentially punched out. It has become. The front and rear feed rollers each include a drive roller and a driven roller arranged above and below, which are rotated intermittently by driving means at a pitch corresponding to the feed amount of the portion to be a card, and are arranged above and below to feed the sheet to the front and rear sides. It is constructed so that the punching process is performed while being fed simultaneously by rollers.

0003

[Problems to be Solved by the Invention] In the conventional apparatus described above, the front and rear feed rollers are used simultaneously to intermittently feed multiple processing points on the sheet to the punching position, which causes variations in roller processing accuracy, etc. Due to the difference in circumferential speed between the front feed roller and rear feed roller, excessive force is applied to the sheet.
This causes problems such as the sheet being bent or stretched between the front and rear rollers, making it impossible to perform accurate punching or damaging the sheet.

The present invention solves the above-mentioned conventional problems and provides a press that can accurately and stably feed a sheet to a press position intermittently without applying excessive force to the sheet. The object of the present invention is to provide an intermittent sheet feeding device for a machine.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the intermittent sheet feeding device in the press machine of the present invention is provided with a forward feeding roller and a trailing feeding roller which are intermittently rotated by driving means at the front and rear of the press die. , a press machine that sequentially presses a plurality of processing locations on the sheet while intermittently feeding the sheet to the press die using front and rear feed rollers; A rear elevating means moves the rear feed roller up and down, and the front feed roller feeds the sheet until a processing location approximately in the center of the sheet is pressed, and then the rear feed roller presses the sheet while feeding it. and control means for controlling the front and rear lifting means.

[0006]

[Operation] With the above structure, when the front and rear feed rollers are rotated by the drive means, the front feed is lowered by the front lifting means while the rear feed roller is in the raised state from the front side of the sheet to the processing location approximately in the center. The sheet is sent by a roller, and then, while the front feed roller is in the raised state, the sheet is sent by the rear feed roller, which is lowered by the rear elevating means, so that the sheet is pressed one by one.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the apparatus of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 7, the sheet 1 is made of an insulating material such as plastic or paper, and the color printing section 2 is arranged in a vertically x horizontally 3 x 8 arrangement pattern corresponding to the area that is to become the card. Information storage sections 3 are formed on the front surface at equal intervals, and on the back surface. As shown in FIGS. 1 to 6, the sheets 1 are transferred one by one by a sheet feeding device (not shown) to a conveying device 4 consisting of a belt conveyor.
The sheet 1 is sent to the punching die 5 by this conveying device 4 while being guided by a guide member (not shown), and the sheet 1 is further punched by front and rear feed rollers 6 and 7 provided before and after the punching die 5. The cards 1A are intermittently fed to processing positions at equal intervals so that the cards 1A are punched one after another. In the punching die 5, a punch 11 is disposed in a stepped guide hole 9 of a punch guide 8 so as to be movable up and down via a return spring 10, and a die 12 is provided below the punch 11, into which the punch can be inserted. A hole 13 is provided so that the punch 11 is struck during one cycle of the ram 14, and three cards 1A are punched out. The front and rear feed rollers 6 and 7 are drive rollers 6A, respectively.
, 7A and driven rollers 6B, 7B are provided above and below.
6 are connected via a reducer 17, and further a drive roller 6
A and 7A are connected by a belt and a pulley 18. Furthermore, front and rear lifting means 19 and 20 are comprised of pneumatic cylinders, hydraulic cylinders, electromagnetic solenoids, etc.
The drive roller 6A is supported by a bearing 22 at the lower end of the front elevating section 19A via a mounting member 21, and the drive roller 7A is supported via a mounting member 23 at the lower end of the rear elevating section 20A. is supported by a bearing 24. The servo motor 16 rotates intermittently at a pitch corresponding to the amount of feed between the cards 1A, and the front and rear lifting means 19, 20 are connected to the belt and pulley 18.
When the driving rollers 6A, 7A are in the lowered state with a vertical stroke that does not interfere with rotation transmission, the driven rollers 6b, 7
The drive position is set to be appropriate for B. Further, it is provided with a control means 25, and this control means 25
drives the servo motor 16 via the motor drive circuit 26 at the set pitch described above, and when the count value of the drive signal of the servo motor 16 or the card position in the first row reaches the position corresponding to the punch 11 of the punching die 5. Until the card 1A up to the approximate center of the sheet 1 is punched out based on a signal from a sensor (not shown) that detects that the Switching control is performed so that the front elevating means 19 is in the ascending state and the rear elevating means 20 is in the descending state until the subsequent card 1A is punched.

Next, the operation of the above structure will be explained.

First, by driving the servo motor 16, the front
In a state where the drive rollers 6A, 7A of the rear feed rollers 6, 7 rotate intermittently and the drive rollers 6A, 7A are in the raised position by the front and rear lifting means 19, 20, the first row of sheets 1 is moved by the conveying device 4. When a sensor (not shown) detects that the card portion has been fed until it reaches the punching position, the driving roller 6A of the forward feeding roller 6 is lowered by the front elevating means 19 as shown in FIG. 1 are sequentially and intermittently fed only by the advance roller 6 in synchronization with the punching operation of the card 1A. In this way, as shown in FIG. 4, the card portions from the first row to the fourth row are punched out, and then, as shown in FIGS. 2
0, the drive roller 7A of the rear feed roller 7 is lowered,
As a result, the sheet 1 is fed only by the rear feed roller 7, and the card portions in the fifth to eighth rows are punched out one after another.

As described above, in the above embodiment, the cards 1A are punched one after another while the sheet 1 is intermittently fed only by the forward feed roller 6, which has been lowered by the front elevating means 19, up to the processing point approximately in the center of the sheet 1. Subsequently, the subsequent parts to be machined are punched one after another while being intermittently fed only by the rear feed roller 7, which has been lowered by the rear lifting means 20, so that the circumferential speed of the front feed roller 6 and the rear feed roller 7 is Due to this difference, the sheet 1 will not be bent or pulled due to excessive force being applied to it, allowing accurate and stable punching and preventing damage to the sheet 1.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the driving means, elevating means, and sheet can be applied to various types, and the press machines can also be applied to various types.

[0013]

Effects of the Invention The present invention provides a front feed roller and a rear feed roller which are intermittently rotated by a driving means at the front and rear of a press mold, respectively, and while the front and rear feed rollers intermittently feed the sheet to the press mold. In a press machine that sequentially presses a plurality of processing locations on the sheet, a front lifting means for moving the forward feed roller up and down and a rear lifting means for moving the rear feed roller up and down are provided, and a control means is provided. The front and rear lifting means are controlled so that the sheet is fed by the front feed roller until a processing location approximately in the center of the sheet is press-worked, and then the sheet is pressed while being fed by the rear feed roller. It is possible to accurately and stably feed a plurality of processing points on a sheet to a press position intermittently without applying excessive force to the sheet.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a punch press machine showing one embodiment of the present invention.

FIG. 2 is a schematic explanatory diagram of a punch press machine.

FIG. 3 is a schematic explanatory diagram showing a punching operation state.

FIG. 4 is a schematic explanatory diagram showing a punching operation state.

FIG. 5 is a schematic explanatory diagram showing a punching operation state.

FIG. 6 is a schematic explanatory diagram showing a punching operation state.

FIG. 7 is a plan view of the sheet.

[Explanation of symbols]

1 Sheet 5 Punching die (press machine) 6 Front feed roller 7 Back feed roller 16 Servo motor (drive means) 19 Front lifting means 20 Rear lifting means 25 Control means

Claims (1)

[Claims] 1. A front feed roller and a rear feed roller are provided at the front and rear of a press mold, respectively, and are rotated intermittently by a drive means, and the front and rear feed rollers intermittently feed the sheets to the press mold, while the plurality of sheets are A press machine that sequentially presses the processing points of the sheet, a front lifting means for moving the front feed roller up and down, a rear lifting means for moving the rear feed roller up and down, and a press machine for pressing the processing points approximately in the center of the sheet. A control means for controlling the front and rear lifting means so that the sheet is fed by the front feed roller until press working, and then the sheet is fed by the rear feed roller while being press worked. An intermittent sheet feeding device in a press machine, characterized by the following.