JPH03197093A - Method and apparatus for removing yarn end of sewn booklet - Google Patents

Abstract

PURPOSE:To easily remove a yarn end by stitching a preceeding booklet and a succeeding booklet by continuous sewing yarn and applying circular arc-shape or triangular notch cutting to the start end and terminal of the fine line of each booklet to remove yarn ends. CONSTITUTION:Booklets 1 each consisting of leaves flatly superposed one upon another are preparatorily cut accurately in the previously process to be subjected to dimensional setting and parallel delivery and successively fed on a feed path in a flat state to be subjected to yarn stitching by a sewing machine 2 and brought to a state mutually connected by continuous sewing yarn while they are subjected to yarn stitching along the center lines thereof. After yarn stitching is applied, the sewing yarn connecting the respective booklets 1 is cut to separate the booklets. By this separation, yarn ends 5 are liberated from the start end and terminal of the fine line of each booklet in a hair like state. Each booklet 1 thus separated is fed to punching devices 6 and arc-like, triangular or square notch cutting 13 is applied to the start end and terminal of the fine line 4 to remove the yarn ends.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method and apparatus for removing thread tails from thread-bound booklets such as bank passbooks, passports, notebooks, etc., which are bound with sewing thread. .

When binding conventional bound booklets, the sewing machine is operated continuously, so the leading and trailing booklets on the bookbinding line are connected by continuous sewing thread, and the sewing machine hook separates each booklet from behind. A process of separating and removing thread tails is essential. If this thread tail remains and is subjected to a subsequent process such as cover pasting, the thread tail will wrap around the inner surface of the cover and be attached together with the cover, resulting in defective products being discharged.

Conventionally, methods for removing the thread ends include manually cutting off the thread ends using scissors, burning them off with a flame, and cutting off the edges of the booklet to remove the thread ends.

The problem that the invention aims to solve is that the methods of manually cutting off the thread ends using scissors or burning them off with flame are inefficient and difficult to cleanly remove, reducing productivity and saving labor. It goes against the norm.

In addition, when using a sewing machine, the method of cutting the edges of the rear booklet and removing the thread tails results in the loss of the reference surface, which has been pre-cut to exact dimensions and is aligned parallel, due to the edge cutting to remove the thread tails. For example, it becomes a hindrance when attaching a cover. In addition, if a mark indicating the direction of the booklet is attached to the corner of the booklet, there is a problem in that the mark is removed by the above-mentioned edge cutting, and furthermore, it becomes difficult to secure a sufficient margin for finishing edge cutting after attaching the cover. It has the following problems.

The present invention was provided for the purpose of solving the above problems.

Means for Solving the Problems The present invention, as a means for achieving the above object, binds the preceding booklet and the succeeding booklet with continuous sewing thread, and then attaches a circle at the beginning and end of the thread of each booklet. This method uses notch cuts such as arcuate, triangular, etc. to remove thread ends.

The present invention also provides a punching table device as a means for performing the notch cut, in which the upper blade has a cylindrical cutting edge and the lower blade has an arcuate cutting edge with a curvature that is in phase with the cylindrical upper blade. This is what we provide.

The booklets provided one after another on the working conveyance path are successively sewn and stitched together, thereby forming a state in which the booklets are connected with the sewing thread.

In the present invention, the sewing thread that connects each booklet is cut and separated, and then a notch cut is made at the beginning and end of the thread, or the thread ends are made by making the above-mentioned notch cut while each booklet is connected with the sewing thread. This is different from the method of cutting off the edges of the booklet and removing the thread tails, so that the thread tails can be effectively removed while leaving the pre-cut reference surface.

In addition, since the 8i section of the booklet edge surface (reference surface) where the end of the thread is released is notched, the reference surface can be left as described above, and a sufficient margin for cutting off the finished edges after attaching the cover can be secured, and the corner portion of the booklet can be cut with a notch. Even if a symbol such as a direction indicator mark is attached, there is no risk of cutting it out.

EXAMPLES Hereinafter, examples of the present invention will be explained based on FIGS. 1 to 5.

The booklet 1 in which the leaves are stacked flat is accurately pre-cut in the previous process to set its dimensions and align, and the booklet 1 is flat-fed one after another on a conveyance path and subjected to thread binding by a sewing machine 2. Each booklet 1 is stitched along its center line and connected to each other by a continuous sewing machine system.

After applying the above-mentioned two stitches, the stitching thread is sent to the sewing thread cutting section 3,
The sewing thread connecting each booklet 1 is cut to separate each booklet. As a result of this separation, thread tails 5 are released in a female shape from the starting and ending ends of thread 4 of each booklet 1.

Each of the booklets 1 thus separated is sent to a punching device 6, where arcuate, triangular, rectangular, etc. notch cuts 13 are made at the starting and terminal ends of the thread 4, and the thread ends 5 are removed.

As shown in FIGS. 4 and 5, the punching table device 6 consists of an upper blade 7 and a lower blade 8. The upper blade 7 has a cylindrical cutting edge 7a, and the lower blade 8 has a cylindrical cutting edge 7a. It has an arc-shaped cutting edge 8a having a curvature in tune with 7a.

The lower blade 8 has a double-edged structure with circular arc-shaped cutting edges 8a facing each other at the back and belly, and has a cocoon-shaped plate shape.

The lower blade 8 is fitted into the lower blade holding groove 9a of the holder 9 and screwed up, and the lower blade holder 9 is held on a base plate 10 having a through hole 10a concentric with the upper blade 7. By loosely inserting the fixing screw 11 set on the base plate 10 into the long hole 9b drilled in the blade holder 9, the holder 9 and the lower blade tip 8 are removed.
A can be pushed out or retreated toward the upper blade through hole 10a,
As a means for performing the ejection, an adjustment screw 12 is provided on the base plate 10.
is provided, and the adjustment screw 12 is abutted against the rear end of the holder, and the rotation of the adjustment screw 12 moves the holder 9 back and forth as described above, and the fixing screw 11 is tightened and fixed at a predetermined position. The lower blade 8 is made of Tsuruga metal such as copper alloy, and when the upper blade 7 is lowered and inserted into the through hole 10a, the cutting edge 8a of the lower blade 8 protrudes from the edge of the through hole 10a. The upper blade 7 cuts the surface, and the lower blade 8 sharpens. When the lower blade 8 is worn out, the cutting edge is regenerated by performing the sharpening described above. In addition, the lower blade 8 has a double-edged structure and can be reversed for repeated use, and the upper blade 7 has a double-edged structure that can be used repeatedly.
By rotating it, it can be used repeatedly.

In this way, by lowering the upper blade, an arcuate notch cut 13 is made at the beginning and end of the thread 4 of each booklet l, and the thread tail 5 is removed together with the notch cut piece 13a.

The outlet side (lower @) of the through hole 10a communicates with a suction hole 14 connected to a vacuum device, and the notch cut piece 13a notched by the upper blade 7 and the lower blade 8 is collected through the suction hole 14. .

The length of the booklet 1 in the feeding direction is set to the length of one unit, two books, three books, etc.
After making the notch cut 13 on both ends of the thread 4, glue the t
Gluing using a nanozzle or the like is carried out by carrying the booklet to the device 15, gluing it from the back side of the booklet along the threads 4, solidifying the threads 4 with adhesive, and then transporting it to the cover pasting section 18 to paste the cover.

Reference numeral 16 denotes a cover, and the cover is fed out at a speed synchronized with the conveyance of the booklet 1 and pasted onto the back side of the booklet 1 while gluing is performed by roller 1f. Alternatively, the threads 4 may be used for pasting on a cover without gluing.

After the cover is pasted, the booklet 1 is sent to a drying section 19 to dry the glue, and then sent to a throat folding section 20 to fold the booklet 1 in half along the perforations.

For example, for the above throat folding, the booklet is folded between two rolls parallel to each other.
1 and roll the folded plate 22 along the thread 4.
This is done by descending to intervene in between.

The booklet 1 thus folded is subjected to a press section 23 to ensure that the folding pattern is formed.

After that, the booklet is subjected to the finishing edge cutting section 24, and the edge cutting cutter 2 is used.
5, the long sides are finished and the short sides are cut off, and the notch cut 13 is cut off together with the edge cut piece 27. At the same time, the booklet 1 is cut into a plurality of booklets 1' by the separate booklet cutter 26, and the booklet 1 to be subjected to the next process is sewn by a sewing machine as described above. Finishing allowance a after pasting the cover as shown.

b, and a symbol C such as a direction indicating mark is provided at the corner if necessary, and the notch cut 13 is cut at the start and end of the thread 4 of the thread-bound booklet 1 within the range of the finishing allowance. The above-mentioned finishing allowances a and b are finished and the edge cutting part 2 is finished.
4, the notch cut 13 is removed.

Effects of the Invention According to the present invention, problems with the method of cutting edges and removing thread tails, such as removing the reference surface, difficulty in securing a sufficient margin for finishing edges, and removal of marks, etc. can be solved. This problem has been solved, the reference plane remains as set, and the finishing edge cutting allowance is secured, and there is no fear of cutting off marks. As long as it is within this range, the position and size can be relatively rough, and thread tails can be easily removed.

[Brief explanation of drawings]

Fig. 1 is a perspective view outlining one embodiment of the method and device for removing thread tails from a thread-bound booklet according to the present invention step by step; Fig. 2 is a plan view of the booklet to be subjected to sewing by a sewing machine; and Fig. 3 is a notched cut. FIG. 4 is a perspective view of a punching device that performs notch cutting, and FIG. 5 is a sectional view of the same. DESCRIPTION OF SYMBOLS 1... Booklet, 2... Sewing machine, 3... Binding thread cutting section, 4... Thread stitch, 5... Thread end, 6... Punching device,
7... Upper blade, 7a... Cylindrical cutting edge, 8... Lower blade,
8a...Circular cutting edge, 13...Notch cut, 13
a... Notch cut piece 16... Cover, 24... Finished edge cut portion.

Claims (5)

[Claims] (1) A thread tail removal method for a thread-bound booklet, in which the preceding booklet and the following booklet are bound with continuous sewing thread, and then a notch cut is made at the beginning and end of the thread of each booklet to remove the thread tail. (2) The method for removing thread tails from a thread-bound booklet according to claim 1, wherein the notch cut is performed after the sewing thread connecting the booklets is cut and separated. (3) The method for removing thread tails from thread-bound booklets according to claim 1, wherein the notch cut is performed while the booklets are connected with sewing thread. (4) A punching device that performs notch cuts at the starting and ending ends of the threads of a thread-bound booklet to remove thread tails, and consists of an upper blade and a lower blade, with the upper blade having a cylindrical cutting edge and the lower A punching device characterized in that the blade has a cutting edge exhibiting an arc shape with a curvature that is in sync with the cylindrical upper blade. (5) The punching device according to claim 4, wherein the lower blade is made of soft metal.