JPS5839745B2 - Sheet feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet feeding device that supplies a sheet such as a vinyl sheet as a cushioning material between panels in a packaging method in which two panels are stacked. The purpose is to automate and save labor.

An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

That is, as shown in FIG. 1, this sheet feeding device cuts a sheet 1 to a fixed size and interposes it between panels 2, and its perspective view is as shown in FIG. 2.

That is, a vinyl sheet 1 wound into a roll is pivotally supported on a shaft 3.

This shaft 3 is inserted into the shaft portion of the sheet 1 wound into a roll by a cylinder 4 which is a shaft insertion device.

A free roller 5 and a drive roller 6 are arranged in parallel in front of the shaft 3,
The sheet 1 is press-fitted and held between these rollers 5 and 6.

Of these, the drive roller 6 is driven by a drive motor 7 to
Rotate in the direction that sends it forward.

In front of these rollers 5, 6, other rollers 8, 9 are arranged in parallel, and the leading end of the sheet 1 is press-fitted and held between these rollers 8.9.

Among these rollers, the roller 8 is a free roller and is held by the cylinder 10 so as to be able to rise and fall freely.
The sheet 1 is held under pressure by the .

Further, the roller 9 is connected to the cylinder 1 via the eccentric rotating plate 11.
2 and rotates a minute amount in conjunction with the lowering of the cylinder 12, sending the leading edge of the sheet 1 forward by a minute amount.

Note that the roller 8 is lowered only when the roller 9 sends the sheet 1 forward, and is in the raised position at other times.

A photoelectric switch 13 is installed below the roller 5.6.
When it is detected that a certain amount of sheet 1 has been delivered by the rollers 5 and 6, the driving of the drive motor 7 is stopped, that is, the supply of the sheet 1 by the rollers 5 and 6 is stopped, and the cylinder 12 is lowered to move the roller 8. 9 is rotated by a minute amount, thereby sending the leading edge of the sheet 1 forward by a minute amount.

This photoelectric switch 13 utilizes the fact that light is blocked by the slack of the sheet 1 when the rollers 5 and 6 send out a certain amount of the sheet 1.

The sheet puller 14 provided in front of the rollers 8 and 9 is
Upper and lower grip plates 16°1T are linked to the lifting and lowering of the cylinder 15.
expands and closes, and the cylinder 15 can be moved forward and backward by the conveyor 18, and the upper and lower gripping plates 16, 1
After closing cylinder 7 and gripping the tip of sheet 1,
By advancing roller 5, rollers 5, 6 and roller 8,
In other words, the sheet 1 can be pulled out by a certain amount until the slack in the sheet 1 between 9 is removed.

(Note that when the sheet 1 is pulled out by the sheet puller 14, since the roller 8 is raised, the sheet 1 is not prevented from being pulled out.

) A cutter 19 is installed immediately in front of the rollers 8 and 9, and after a certain amount of the sheet 1 is pulled out by the sheet puller 14, the cylinder 20 descends to cut the sheet 1.

Note that after the sheet puller 14 has pulled out a certain amount of the sheet 1, the drive motor 7 is set to operate to supply the next sheet 1.

Further, the sheet puller 14 is set to further advance after the sheet 1 is cut by the cutter 19, interpose the cut sheet 1 between the panels 2, and then retreat again to return to the original position. There is.

With this configuration, the sheet 1 can be automatically fed at a fixed length between the panels 2 in the following manner.

That is, first, the leading end of the sheet 1 wound into a roll is pulled out and passed between rollers 5 and 6, and then the leading end is passed through roller 8.
, 9 are held in pressure contact.

In this case, the sheet 1, as shown by the imaginary line in FIG.
It is stretched between rollers 5, 6 and rollers 8, 9 without slack.

In this state, the drive motor 7 is operated.

Then, the sheet 1 is sent forward by the rollers 5 and 6.

When a certain amount of the sheet 1 is fed out, the photoelectric switch 13 is activated to stop the drive motor 7, and the cylinder 12 is activated so that the leading edge of the sheet 1 is fed out by a minute amount to the front of the cutter 19 by the rollers 8 and 9. The leading end of the sheet 1 can be easily gripped by the sheet puller 14.

Then, the roller 8 rises, the cylinder 12 rises further, and the roller 9 returns to its original position.

After that, the upper and lower grip plates 16 and 17 of the sheet puller 14
, the leading edge of the sheet 1 sent out in front of the cutter 19 is gripped, and the upper and lower gripping plates 1 are gripped by the conveyor 18.
6 and 17 move forward until the slack in the sheet 1 between the rollers 5 and 6 and the rollers 8 and 9 disappears, that is, the sheet 1 is pulled out by a certain amount.

Thereafter, the sheet 1 is cut into a fixed size by the cutter 19.

The cut sheet 1 is further sent forward by the sheet puller 14 and inserted between the panels 2.

After the sheet drawer 14 inserts the sheet 1 between the panels 2, it returns to the re-string position and prepares for drawing out the next sheet 1.

Note that after the sheet 1 is pulled out by a certain amount by the sheet puller 14, the 1 drive motor 7 is operated again, so the above process is repeated and the sheet 1 is continuously supplied to the space between the panels 2 at a fixed size. and is done automatically.

In this way, it is possible to automate the fixed size supply of the sheet 1 and save labor.

As described above, the sheet feeding device of the present invention includes a cutter for cutting the sheet, and a roller provided immediately behind the cutter that holds the leading end of the sheet under pressure between the sides of the roller and cuts the end of the sheet. a pair of micro-amount delivery rollers that deliver a micro-amount of sheets in front of the micro-amount sheet delivery roller; a fixed-amount sheet delivery roller that is placed behind the micro-amount sheet delivery rollers and holds the sheet in pressure contact between the side surfaces of each roller; A detection switch is provided in front of the cutter to detect that a certain amount of sheets have been sent forward from the sheet delivery roller, and to stop the drive and also to drive the minute amount sheet delivery roller. It is equipped with a sheet puller that grasps the leading edge of the sheet sent out in a small amount from the sheet delivery roller and pulls the sheet forward until there is no slack between the two delivery rollers, thereby automating the fixed-size feeding of sheets. This has the effect of saving labor.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a state in which a sheet is interposed between panels, and FIG. 2 is a perspective view of an embodiment of the present invention. 1...Sheet, 5, 6...Roller (constant amount sheet delivery roller), 8.9...Roller (minor amount sheet delivery roller), 14... ...Sheet drawer, 19...Cutter.

Claims (1)

[Claims] 1. A cutter for cutting the sheet, and a pair of micro-feeding rollers installed immediately behind the cutter to hold the leading edge of the sheet in pressure contact between the sides of each roller and feed the edge of the sheet in a microscopic amount in front of the cutter. a fixed amount sheet delivery roller disposed behind the minute amount sorting delivery roller and holding the sheet in pressure contact between the side surfaces of each roller, and a fixed amount of sheets sent forward from the fixed amount sheet delivery roller. a detection switch that detects that the cutter has stopped and stops the drive and also drives the minute amount sheet delivery roller; and a detection switch that is provided in front of the cutter and grips the leading edge of the sheet that has been sent out in a minute amount from the minute amount sheet delivery roller. and a sheet drawer for pulling out the sheet forward until there is no slack between the two feed rollers.