JPS6256127A - Automatic bag making machine for paper bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a #91 bag machine that manufactures paper bags such as envelopes. This invention relates to an automatic S1 bag machine capable of uniformly applying an appropriate amount of glue to the entire width direction of a bottom lid when gluing.

(Prior art) Automatic R-Iso for envelopes and other products is generally made using paper punched out in the bag's development! I have 1 bag. As an example of paper, Figure 4 shows paper 1 in the case of 91 bags of envelopes.For 1 gram and 1 bag, paper 1 with such a reading diagram is placed on the paper feeder, The paper is fed one by one with growth 2 first, and while being transferred by a carrier roller, the body and bottom are pasted to form nfi2+.

To attach the body, glue threads, rollers, etc. are placed at the passing positions of the back 3, and after making 4 digits in the vertical and horizontal directions on one side of the back 63, vertical stripes are made of a roller with a ■-shaped groove and a circular blade. For attaching, a vertical folding line 5 is made in the width of the body using a device, and the back rice 3 is pasted together using a folding device that folds along the line. The bending device is for wk
A common method is to place a core metal on the inside of the vertical crease 5 while transporting the camera back 3, and then bend the back cover 3 inward using a guide plate. Fold the glued side first, then fold the glued side later.

The paper 1 is made into a cylindrical shape by this body pasting, and if necessary, horizontal creases 6 are made by a device, and the sheet is transported by a carrier roller 7 and a pressure roller 8 as shown in FIG. 5, and is pasted at the bottom. 9 A paper stopper 9 is provided protruding from the upper surface of the bottom pasting part, and a glue thread 12 and a curved surface are formed above the base metal 11 whose side opposite to the transport direction of the bottom pasted cylindrical paper 1 is a curved slope 10. bottom folding plate 13
The glue thread 12 is stretched on a pulley 14'' in front of the paper stopper 9 so as to be orthogonal to the transport direction of the paper 1. The pulley 14i is pivoted so as to move in a reciprocating arc along the L axis, and a drive pulley 15 is disposed to rotate the pulley 14i via the glue thread 12. When the transferred cylindrical paper 1 passes through the movable guide plate 17 and hits the paper stopper 9, the horizontal folding line 6 hits the movable guide plate 17.
and the base metal 11. The bottom folding plate 13 is fixed to an arm 19 which is pivotally connected to the 7th frame 18, and when the cylindrical plate #1 hits the stopper 9, it descends and passes through the horizontal folding line 6 to the bottom lid 2. , and then hook the bottom vM, 2 part to the curved slope 10 of the base metal 11.
, and is sent into the space between the carrier roller 7 and the rear pressure roller 20, and then rises. The bottom folding plate 13 is lowered and raised during the interval during which the cylindrical sheet 1 is transferred. Furthermore, when the bottom holder 2 of the glue thread 12 is bent and the point rises upward, the glue thread 12 touches the outer part of the glue thread 12.
It is meant to be glued.

Therefore, in this bottom sticking section, when the cylindrical paper 1 hits the stopper 9, the bottom folding plate 13 descends and the bottom cover 2 is folded, the top surface thereof is first glued.

Then, it is folded in half at the horizontal folding line 6, and transferred to the carrier roller 7 and rear pressure roller 20 while being hooked, and the bottom 'fL2 is attached by both rollers.

As shown in FIG. 6, the driving pulley 15 for moving the glue thread 12 is disposed closer to the glue pot 21 than the pulley 14 that stretches the glue thread 12 above the base metal 11. is constantly rotated while being immersed in the glue pot 21. *The amount of glue M on the glue thread 12 is determined by attaching the brush 22 to the glue thread outlet of the glue pot 21, and removing the excess glue s23.
Q is adjusted by scraping off.

In addition, the pulley 14 is attached to a boot plate 24,
The boot board 24 is configured to move up and down by about 10 mm almost in synchronization with the bottom folding board 13 using a cam mechanism or the like. f-
The purpose of the board 24 is to prevent the glue thread 12 from getting caught up when the bottom cover 2 is bent when the paper 1 is thick. The reason why the guide plate 24 is moved one position is because when the length of the bottom cover 2 is short, the paper stopper 9 is moved to the movable guide plate 17 side, and the glue thread 126 and the base metal 11 are
1-.

This is because if the back cover 3 has a curvature in order to be placed close to the surface, it may come into contact with the acid group 2C glue thread 12 when the paper 1 is transferred. For this purpose, the dowel plate 24 is moved up and down so that the glue threads 12 hang upward when the paper 1 is transferred.

(Problems to be Solved by the Invention) However, when the bottom sticking part is configured as shown below, the following problems exist.7(1) Bottom lid 2-.
Since the gluing of , is carried out by the bottom cover 2 coming into contact with the constantly moving glue thread 12, the side edges of the bottom 62 and the side r
II is scraped off, and the amount of sizing 'ffI increases on the upstream side of the sizing thread 12. For this reason, when the bottom is pasted, it protrudes beyond the bottom cover 2, and when the receiver receives the envelopes stacked on top of each other on the stand,... The glue that spilled out glued the pieces together, creating an accordion-like shape.

(2) I! i! It is necessary for the I thread 12 to have more glue attached to the side where the thread length 2 contacts, but even if this adjustment is made using the brush 22, the distance from the glue pot 21 to the stand 4t11 is long. , the glue thread 12 is twisted and adjustment is difficult.

(3) If the amount of glue attached to the glue thread 12 is too small, the adhesion of glue to the IL lid 2 will be poor, and if it is too much, it will cause the glue to stick out, so it is necessary to adjust the amount to an appropriate amount. It is difficult to do 11111 in an appropriate amount.

(4) Since the glue thread 12 moves upward, it is easy to glue all the way to the tip of the bottom cover 2 (which tends to cause glue to ooze out).

(Means for Solving the Problems) The present invention provides an automatic bag making machine that solves the above-mentioned problems in the bottom folding part of conventional automatic bag making machines. 8 The automatic bag making machine of the present invention has an intermittent rotation device or an intermittent rotation conversion device following the drive pulley, and the intermittent rotation timing of these devices is controlled by the lowering of the bottom folding plate and the curved needle face of approximately 100 mm. When this point is reached, the rotation of the pulley stretched on one side of the base metal, that is, the movement of the glue thread, is stopped, and the bottom cover is brought into contact with it during this period of stoppage. be.

If the glue threads are stopped when the bottom cover comes into contact with the glue threads, the glue will be applied evenly to the entire bottom, and no overflow will occur.

As an intermittent rotation device that rotates the drive pulley intermittently,
Examples include pulse motors, and intermittent rotation converters include electromagnetic clutches, electromagnetic brake units, and one-way clutches. This intermittent rotation conversion device is connected to a drive source for moving a carrier roller or the like, or a rotating body (for example, a timing pongee) led from the drive source. To prevent the glue thread from twisting, the part of the glue thread where the glue is applied should be in the direction of the extension of the platinum part. Also, in order to maintain a constant amount of glue, use a rotating body to pump up the glue from the glue pot, and use a doctor to remove the glue! iL, make sure to copy the llI arrangement onto the glue thread. Furthermore, in order to prevent the glue from adhering to the tip of the bottom cover, the direction of movement of the glue threads is diagonally up and down or in the direction of paper transport.

The present invention will be specifically explained below using Examples.

(Example) Figure 1 shows the bottom folding part of the automatic bag making machine of the present invention.
carrier roller 7, pressure roller 8, movable guide plate 17,
The base metal 11 and bottom folding plate 13 are arranged as before! l has been used. Further, a paper stopper 9 is provided on the upper surface of the base metal 11 as in the conventional case, and a curved slope 10 is provided on the opposite side to the conveyance direction of the paper 1.
It has become. Further, a rear pressure roll 20 and a carrier roller 7 are arranged behind the base metal 11 as in the conventional case.

An arm 25 is fixed to the 7-frame 18 so as to project horizontally, and a swing rod 26 is pivotally attached to the tip of the arm 25. A coil spring 27 fixed to the 7-frame 18 is attached to the middle of this swinging rod 26, and a cam 28 is arranged below the coil spring 27, so that when the cam 28 operates, the swinging rod 2G swings. It is supposed to be done. The cam 28 is designed to rotate intermittently, and stops when the bottom folding plate 13 is at the "1" raised position, and starts rotating around the time when the bottom folding plate 13 starts to lower. It is designed to stop while descending the curved slope 11 of. The shape of the cam 28 is such that when the tip of the bottom folding plate 13 almost reaches the horizontal fold vJ6 of the paper 1, the glue thread 12 comes closest to the base metal 11 and stops for a while, and the bottom folding plate 13 The bent bottom cover 2 can now come into contact with the bottom cover 2. Then, as the bending of the bottom 2 by the bottom folding plate 13 progresses, and when the glue on the bottom 62 reaches a point somewhat in front of the tip of the bottom 62, it is set so that it begins to separate from the base metal 11. The suspension period of the glue thread 12 is adjusted so that at least the growth 2 occurs and the trap is in contact with the glue thread 12 and remains open. Further, the intermittent rotation of the cam 28 is achieved by connecting an intermittent rotation converting device to a timing wheel of the paper feeder which rotates once every time one sheet of paper is fed, as in the prior art.

A pulley 14 and a board plate 24 are attached to the lower end of the swinging rod 26 with bolts 29, and a glue thread 12 is wound around the pulley 14.

The glue thread 12 is attached to a drive pulley 15 as shown in FIG.
The glue is wound around and returns in the direction of the pulley 14, contacting the boot 9-30. These pulley 14, drive pulley 15, and glue pulley 30 are arranged so as to exist on the same plane. The circumference of the drive pulley 15 is determined by the length of the horizontal recess 6 of the largest sheet of paper used in the bag making machine.

For gluing, the lower part of the pulley 30 is immersed in the glue 23 placed horizontally 21, and the side above 11123 has a doctor 3.
1 is arranged so that the amount of adhesion of a23 can be adjusted.

As shown in FIG. 3, an electromagnetic clutch 33 is fixed to the end of the rotating shaft 32 of the drive pulley 15, and a rotating shaft 34 is fixed to the opposite side of the electromagnetic clutch 33 from the rotating shaft 32. . A pulley 35 is fixed to this rotating shaft 34, and a belt is inserted between the pulley 35 and a pulley 37 fixed to a timing shaft 36 (a timing shaft that rotates once every time one sheet of paper is fed by the paper feeder). It is multiplied by 38.

The electromagnetic clutch 33 is of a one-turn type, and stops the rotation of the rotary shaft 32 in synchronization with the downward movement of the bottom folding plate 13,
It is designed to rotate once in synchronization with the rise of the vertical motion.

(Function) In the bottom folding section configured as described above, the timing shaft 36 is constantly rotating, so the rotating shaft 34 is also constantly rotating. When the bottom folding plate 13 is raised while the rotating shaft 34 is rotating, the electromagnetic clutch 33 is activated to connect the rotating shafts 32 and 34 and move the glue thread 12. The pulley 30 is rotated by the glue thread 12. During this rotation and g-gluing, the pulley 30 pumps up the a23, and the amount of pumping is adjusted with the doctor 31, and the gluing thread 1
Take a soft copy of 2. Also, when the glue thread 12 is moving, the cam 28 pushes the swing rod 26 to keep the glue thread 12 away from the base metal 11, so that the Ath1 is not transferred onto the base metal 11. However, it will not get caught on the glue thread 12.

When the bottom folding plate 13 starts descending, the cam 28
6 is no longer pressed, the MA A 12 descends, and when the tip of the bottom prayer plate 13 reaches the base 4t11, it comes closest to the base metal 11. When the tip of the bottom folding plate 13 reaches the base metal 11, the electromagnetic clutch 33 stops at the same time as the glue thread 12 stops.
The connection is released, and the movement of the glue thread 12 also stops. Therefore, when the bottom folding plate 13 bends the transverse warp line G and the bottom cover 2 rises and comes into contact with the glue thread 12, the bottom cover 2 is covered with glue 2.
3 adheres evenly.

The glue thread 12 is T after the bottom 5 2 contacts! 1. Since it moves diagonally upwards faster than the bending speed of 2, a23 does not adhere to the tip i of the bottom 112.

Although a typical embodiment has been described above, it is possible to modify this embodiment as follows.

(a) For Itl attachment, the boo 9-30 and drive pulley 15 are not separate; for gluing, the pulley 30 is also used as the drive pulley. Or with glue, boo 9-30 and drive pulley 1
5 and are driven separately.

(b) The shape of the cam 28 is changed to make the rotation of the cam 28 continuous. *Turn the cam 28 into a crank.

(Ha)! ! The swinging of the moving frame rod 26 is not a circular arc motion, but is made into a linear motion by using an air cylinder-5 electromagnetic twist/id.

(d) Strengthen the material of the glue thread 12 and remove the glue plate 24.

(Ho)! ! Make the moving frame rod 26 fixed type.

(Effects) As described above, in the automatic bag making machine of the present invention, when the bottom cover of the paper in the bottom pasting section is bent by the bottom folding plate, the glue threads are stopped, so the glue adheres uniformly to the aS. do. In addition, since the length of the gluing thread up to the rear base metal is shorter than before, it does not twist and more glue can be applied to the side that contacts the bottom.

Furthermore, it is best to use a doctor to apply glue to the glue threads! Since the prepared material is transferred using a pulley, it is easy to adjust the amount of adhesion. Furthermore, since the direction of movement of the glue thread is the front and back direction of paper transport, the glue will not be applied to the tip of the bottom cover.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the automatic RR according to the present invention. Figure 1 is a cross-sectional view of the bottom sticking part, Figure PI42 is a back view showing the drive system for the glue thread, and Figure #I3 is a horizontal view. FIG. 2 is a side view showing the drive system of the drive pulley of the system as seen from the direction of FIG. FIG. 4 is a plan view of the paper used for bag making, showing the paper used for 91 bags of %M paper. Figures #I5 and 6 show a conventional automatic bag making machine, where Figure #5 is a sectional view of the bottom sticking part, and Figure 6 is a rear view showing the drive system for the side threads.

Claims (4)

[Claims] (1) A paper stopper is protruded from the top surface, and a glue thread and a curved bottom folding plate are arranged above the base plate, which has a curved slope on the side opposite to the paper transport direction, and the glue The thread is stretched by a pulley before the paper stopper so as to be perpendicular to the paper transport direction, and the bottom folding plate is pivoted so as to move up and down in a reciprocating arc along the curved slope of the base metal. An automatic bag making machine is equipped with a drive pulley that rotates through a glue thread, and the drive pulley is connected to an intermittent rotation device or an intermittent rotation conversion device, and the timing of the intermittent rotation of these devices is controlled by a bottom folding plate. An automatic paper bag, characterized in that the rotation of the pulley is adjusted to stop at least from the time when it descends and reaches approximately the curved slope of the base metal until the time when gluing to the bottom cover of the paper is completed. Bag making machine. (2) The automatic paper bag making machine according to claim 1, wherein the pulley for tensioning the glue thread is supported so as to move diagonally up and down in synchronization with the bottom folding plate. (3) The automatic paper bag according to claim 1, characterized in that the pulley for tensioning the glue thread is supported so as to move back and forth in the paper transport direction in synchronization with the bottom folding plate. Bag making machine. (4) The paper bag according to claim 1, wherein the glue thread is guided to the upper part of a pulley whose lower part is immersed in a glue pot, and a doctor is placed in contact with the pulley on the rotational direction side. automatic bag making machine.