JPH02120030A - Method for controlling conveying processing of sheet - Google Patents

Abstract

PURPOSE:To obtain the predetermined strength, favorable external appearance and improve the commercial value of sheet by a method wherein the conveying of the sheet is processed so that the n-th fixing position is located so as to be at the specified position from the front end of the sheet, when the sheet is fixed at (n) positions at equal pitch within the region ranging from the starting edge to the terminal of the sheet. CONSTITUTION:Let a point Ps, the distance from which to the front end of a sheet having the total length of D is d1, be the starting edge and let a point Pe, the distance from which to the rear end of the sheet is d3, be the terminal. When (n) points are fixed at pitch P within the region ranging from the point Ps to the point Pe having the distance between the of d2, the conveying of the sheet is processed so that the n-th fixing position is located so as to be at the position, the distance from which to the front end of the sheet is dn=d1+ PX(n-1). As a result, respective fixing positions can be controlled precisely when the fixing is done in a plurality of positions at the predetermined pitch and no error is enlarged. Accordingly, at the controlling of the fixing position, the fixing positions become uniform and look nice. Further, the desired length can be obtained and the commercial value of a product is remarkably improved.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a sheet conveyance control method when sheets are fastened at regular intervals.

<Prior Art> As is well known, boxes and cylinders made of corrugated paper and the like are often used as packaging materials due to their simplicity and cost. The box and the like are formed by folding a sheet of corrugated paper or the like cut into a developed shape into a desired shape, and then placing a Stella pull in a predetermined position or applying an adhesive. Therefore,
For example, when casting Stella pulls at a pitch p, conventionally, the placement position of the last Stella pull was used as a reference, and the sheet was conveyed for two pitches from this casting position, and then the next Stella pull was placed. It is set up.

<Problems to be Solved by the Invention> Therefore, if an error occurs in the amount of conveyance of the sheet, this error will be accumulated each time a Stella pull is placed, resulting in a large error on the terminal end side. If this error is large, it will not be possible to obtain the desired strength, and the appearance will be poor, resulting in a decrease in commercial value.

(Means for Solving the Problems) The present invention has been proposed in view of the above, and the starting point is a point Ps located at a distance ad I from the front end of the full length sheet, and the point Ps is located at a distance 11fI d 3 from the rear end of the sheet. A pitch p is placed in the area of distance d2 between the point Ps and the point Pe, with the point Pe as the termination point.
When the sheet is fastened at n locations, the sheet is conveyed so that the nth fastening position is a distance dn=dI+pX (n-1) from the front end of the sheet.

<Function> If dl is the distance from the front edge of the sheet to the starting point of attachment, and p is the attachment pitch, then the nth attachment position is located at a distance of 11dn=d++pX(n-1) from the front edge of the sheet. Can be set.

<Embodiment> The present invention will be explained below with reference to illustrated embodiments. FIG. 1 is a flowchart of the present invention, and FIG. 2 is a flow chart of the sheet fastening device 1.
FIG. 3 is a plan view of the sheet.

The sheet fastening device 1 includes an NC device 6 including a data input section 2, a control section 3, a stitch shaft motor speed control section 4, a chain shaft motor speed control section 5, and the like. Therefore, in this NC device 6, the total length D of the sea to be fixed, the stopping start position Ps, the stopping end position Pe, the stopping pitch P, or the number of strokes N.
Enter.

The number of strokes n or pitch p to be controlled is calculated.

The length dl of the attachment area is obtained by subtracting the distance dl from the entire length to the attachment start point and the distance d3 from the rear end to the attachment end point, and the length dl of the attachment area is , the number of strokes n or the pitch p to be controlled can be determined by dividing by the stopping pitch P or N-1.

Then, the sheet S to be fastened is inserted into the sheet fastening device 1, and the chain 8 is driven by the chain drive control device 7 to transport the sheet S. The chain shaft drive control device 7 is composed of, for example, a vacuum clutch brake, and is located between the chain shaft drive motor 9 and a drive sprocket 10 on which an endless chain 8 is stretched. The output shaft 7' of the chain shaft drive control device 7 is a drive sprocket lO
By intermittently transmitting the rotational output of the chain shaft drive motor 9, which is transmitted from the chain shaft drive motor 9 to the chain shaft drive control device 7 via the transmission means 9', to the drive sprocket 10. , drive sprocket)
10 is rotated intermittently so that S) stops at the desired conveyance amount. The chain 8 also has a locking pawl 1.
1 is provided, and the sheet S is conveyed by locking the rear end of the sheet S with this ffi retaining pawl 11. Furthermore, the second
In the figure, the chain 8, drive sprocket 1O, etc. are shown as schematic side faces, and the chain shaft drive control device 7, chain shaft drive motor 9, etc. are shown as a schematic plane.

A chain shaft drive control device that detects the front end of the sheet S that has been inserted into the sheet fastening device l and has started conveyance using a front end detection sensor 12 configured as a limit switch, and communicates this detection signal to the chain shaft drive motor 9. 7 starts counting the pulses of the pulse generator 13 provided on the input side of the pulse generator 13.

By counting the pulses, the chain shaft drive control device 7 is controlled so as to stop the sheet S at the point Ps, which is the first stitch position. That is, since the conveyance distance per 1 pulse is always constant, when a predetermined number of pulses are counted, the distance from the front end of the sheet S becomes dl, so the chain shaft drive control device 7 is activated and the chain shaft drive motor 9 The output of S is cut off to stop the conveyance of S.

Further, the stitch shaft drive motor 14, which is shown in a schematic plan view in FIG. 2, is intermittently connected to the stitch shaft 15 of the stitch device A, which is a fastening means, via a stitch shaft control device 16. Then, when the seam) S stops at the first stitch position, the stitching shaft 15 is rotated and stitching by the stitching device A is started. Note that the stitch shaft 15 continues to rotate until one cycle of stitching the sheet S is completed. The stitching device A also includes a pair of movable members B1. B2, and both rotating portion members Bl.

B2 performs stitching by being moved synchronously by a chain C or the like.

The timing at which the first stitch is completed and the pitch feed starts is determined by a rotation l provided coaxially with the stitch axis 15.
It is detected by a signal from a pitch feed start sensor 19 of a timing generating section 18 consisting of 1117. Note that, in the timing generating section 18, a schematic plane and a schematic side surface of the rotary disk 17 and the like are shown side by side. The pitch feed start sensor 19 is composed of a proximity switch, detects the post 2o protruding from the rotary disk 17, and sends a start signal to the control section 3 of the NC device 6.

The control section 3 of the NC device 6 restarts the pulse count of the pulse generator 13 based on the start signal, and conveys the sheet S at a predetermined pitch.

The operation of the chain drive control device 7 is stopped and the output of the chain shaft drive motor 9 is transmitted to the drive sprocket 10. The chain 8 is driven to convey the sheet S, and predetermined pulses are counted.

The stitching position of the second stitch, that is, the distance from the front edge is d
When the sheet S reaches 2-thickness d++pX (2-1), the second stitch is made in the same manner as above.

Then, repeat the above process until n stitches are completed. At this time, the nth stitch position is
It is regulated at a distance dn = d+ + pX (n-1) from the front end.

When the n-th stitch is completed, the timing generating unit controls the stitch axis control device 16 based on the signal from the first stitch axis stop position timing sensor 21 to transport the sheet s and stop it in the next stitch area. . The stitch axis stop position timing sensor 21 is composed of a proximity switch, detects a protrusion 22 provided on the rotary disk 17 of the timing generating section 18, and sends a detection signal to the control section 3 of the NC device 6.

As described above, the nth stitch is made by the conveyance control by pulse counting after detecting the front end of the sheet S, and by the stitch control by the signal from the timing generator 1B that is synchronized with the rotation of the stitch shaft 15. , where dn is the distance from the front end of the sheet S, dn = d+ + pX (n-1).

Although the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to the above-described embodiments, and can be carried out as appropriate without changing the configuration described in the claims. In the embodiment, the sheets are fixed by stitching, but instead of rotating the stitch shaft, the timing of applying or spraying the adhesive can be controlled, and the invention can also be applied to a riveting device. Further, the present invention can also be applied to determining the printing position, etc.

<Effects of the Invention> In short, the present invention has a starting point at a point Ps located at a distance d I from the front end of a full-length sheet, a point Pe located at a distance l d 3 from the rear end of the sheet as an end, and a point Ps and a point P
When the sheet is fastened at n points with a pitch p in the range of distance It dy between the sheet Since the sheet is conveyed at a certain pitch, when fastening is performed at a plurality of locations at a predetermined pitch, each fastening position can be accurately regulated, and errors do not increase. When the #JW of the fixing positions is performed, the fixing positions are aligned, the appearance is good, the desired strength can be obtained, and the commercial value of the product is greatly improved.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a flowchart, FIG. 2 is a schematic system diagram of a sheet fastening device using a Stella pull, partially showing a schematic plane and a schematic side view, and FIG. 3 is a plan view of the sheet. It is. l... Sheet fixing device, 6... NC device, 7...
Chain shaft drive control device, 8...Chain, 12...
- Front end detection sensor, 16... Stitch axis control device, 18... Timing generator.

Claims (1)

[Claims] The starting point is a point P_s located at a distance d_1 from the front edge of a sheet with a total length D, and a point P_e located at a distance d_3 from the rear end of the sheet.
The distance d_2 between point P_s and point P_e with
When n points of the layer are fastened in the region with a pitch p, the nth fastening position is the distance d_n=d_1+p from the front edge of the sheet.
A sheet conveyance processing control method characterized in that the sheet is conveyed so as to be at a position of x(n-1).