JPS6372529A - Method of parting sheet article - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a resin film (sheet product) having perforations spaced at regular intervals in the length direction, for example in a bag making machine.
While intermittently transporting the film in the longitudinal direction, the perforations are cut at the intermittent stops to form a film bag. This article relates to a sheet material cutting method used during manufacturing.

2. Description of the Related Art Conventionally, a structure of this type has been proposed in Japanese Utility Model Publication No. 60-25367. In other words, a continuous bag band having perforations at regular intervals in the length direction is intermittently transferred in the length direction using a transfer roller, etc., and when the welding jaws stop intermittently, the welding jaws weld near the perforations, and the perforations are removed. Cutting with a cutting member.

Problems to be Solved by the Invention According to the above conventional method, if the intermittent transfer amount (transfer length) by the transfer lobe etc. is not constant, the stopping position of the perforation part relative to the cutting member will shift, making it difficult to cut correctly. I can't do it. To solve this problem, it has been proposed to start a timer counter F from the time the transfer roller is driven, and to stop the drive device after counting a set number.

However, with this method, the above-mentioned positional deviation occurs due to the occurrence of slitting between the transfer roller and the continuous bag band, the elongation of the continuous bag band, and the fact that the 1M pitch of the perforations is not always constant. This is not suitable because misalignment accumulates due to repeated cutting operations. Another possible method is to use a detector to detect the lower end of the continuous bag belt that is intermittently transferred, and to stop the drive device based on this detection. However, if the bag to be manufactured is long and the pitch of the perforations is long, the hanging portion due to transportation will sway due to surrounding air currents (transfer wind, etc.), leading to detection errors.

The purpose of the present invention is to always cut the perforations with a cutting device, even if slipping or elongation occurs, even if the manufacturing pitch of the nine perforations is disturbed, and even if there is air flow at the bottom. It is an object of the present invention to provide a method for cutting a sheet material that can be used to cut sheets facing each other.

Means for Solving the Problems In order to solve the above problems, the sheet material cutting method of the present invention is as follows:
A sheet material having perforations spaced at regular intervals in the longitudinal direction is intermittently transported downward by a feed-out device, and while the feed-out device is intermittently stopped, the perforation portions are cut by a cutting device installed below the feed-out device. In this sheet material cutting method, a detection device is provided at an intermediate portion of a sheet starting and unfolding path by a feeding device, and when the detection device detects the lower end of the sheet material, a timer means is activated. When the set time has elapsed, the delivery device is stopped and the cutting device is activated.

According to the structure of the present invention, the lower end of the sheet object is detected in the middle part of the sheet object delivery path which is hardly affected by the wind, and from the time of this detection, the timer means is activated, and when the set time has elapsed, the feeding device is activated. Stop and place the perforations facing the cutting device.

Example An embodiment of the present invention will be described below based on the drawings.

First, a film bag is inserted into a case incorporating a sheet cutting device that can carry out the sheet cutting method of the present invention.
This will be explained with reference to FIGS. Film bag insertion equipment (
The main body of 1) is formed by a rectangular frame-shaped machine frame (2),
The main conveyor (3) is entirely installed so as to pass through the machine frame (2). An incoming conveyor (4) is connected to the starting end of the main conveyor (3), and an outgoing conveyor (5) is connected to the terminal end. Although these conveyors (3), (4), and (5) are shown as belt conveyors, they may be roller conveyors or the like. A linear conveyance path (6) is formed by these conveyors (3), (4), and (5).
5) The unfolded film bag (8) and the fully inserted case (7)
). Inside the machine frame (2) is a film bag (8
) and inserting them into the case (7). Two devices are installed in the direction of the conveyance path (6). These devices have the same or nearly the same configuration, and only one will be described below. Note that the base number may be singular or a plurality of three or more bases. A rewinding device αυ that rotatably supports a roll body aO formed by winding a long film (9), which is an example of a sheet material, at the lower part of the machine frame (2) at the side of the conveyance path (6). A feeding device that intermittently transports the rewound long film (9) downward above the transport path (6)! ea2'! It is set up in

The long film (9) is formed in a state in which the cylindrical tube body is folded (crushed) into a gusset shape, and the welded part (end) and the sewing machine turn part α are close to each other, These are formed at predetermined pitches in the direction of their entire length, and in the next state, they are pre-wound into a roll to form a roll body aO, which is then set in the unwinding device α. A hanging portion α9 is formed between the rewinding device α which is continuously operated and the feeding device @ which is intermittently operated, so that the long film (9) can be transferred smoothly even in different operating modes. There is.

A cutting device Qf9 for the perforated portion Q4) is provided below the feeding device (2), and below the cutting device αG, the opening (8a) is cut by adsorption to the periphery of the opening (8a) of the film bag (8). An opening device α7) is provided to expand the opening. A clamping type lower conveyor @ and a downward air supply device a8 are arranged between the cutting device αQ and the opening device αη.

In the main conveyor (3) section, a lift device αI for lifting the case (7) from the main conveyor (3) is provided directly below the opening device αη. C(1) indicates a manual papermaking box.

In the above-mentioned overall configuration, the operation is as follows. Empty cases (7) are transported from the inlet conveyor (4) to the main conveyor (3).
), and is stopped between the opening device aη and the lift device (II).Meanwhile, the long film (9) is transported by the intermittent drive of the feeding device and the interlocking drive of the lower conveyor (c). It is sent downward by a length equal to a predetermined pitch, and by intermittent stopping, a downward opening (8a) is formed.
The periphery of the device opens and faces the device α.

In this state, the pair of suction devices on the opening device α move toward each other to suction both sides of the peripheral edge, and the cutting device αG operates to cut the perforation portion α→. As a result, a film bag (8) with an opening (8a) located at the bottom and held by the lower conveyor 31) is created. Next, downward air is supplied by the operation of the air supply device (to), and both suction devices are moved apart from each other while the delivery device 4 and the downward conveyor 121 are driven. Then, the opening (8a) of the film bag (8) sent out by the lower conveyor 31) is gradually expanded and turned over by the supplied air force, so that it becomes bulged. Before and after the above-mentioned air supply, the case (7
) is lifted, and the bulge of the film bag (8) can be fully inserted into it.

Then, with the air supply stopped and the suction by the opening device αη released, the lift device 01 is operated in reverse to lower the case (7) and unload it onto the main conveyor (3).

The case (7) in which the film bag (8) is fully inserted is transferred from the main conveyor (3) to the discharge conveyor (5), and then transported to the next process such as filling.

An embodiment of the sheet material cutting device includes a 1rff feeding device @ and a cutting device α0, and the details will be described below based on FIGS. 1 to 6.

The feeding device 4 has a pair of left and right upper rollers (3QA
X30B) and a pair of left and right lower rollers (3LA) (31
B), a plurality of spring bells (32AX32B) wound between upper and lower opposing rollers, and a bearing stand 1331 supporting one upper roller (3QA) relative to the other upper roller (30B). a guide frame (2) that guides the bearing pedestal so that it can approach and move away; a spring that biases the bearing pedestal in the approach direction; and an operation handle e171 that moves the bearing pedestal apart; It is composed of an intermittent drive type motor (to) that is interlocked with the upper roller (30AX30B), and a plurality of static eliminators e391 provided opposite to the moving path of the long film (9). The upper rollers (30A) (30B) and the motor ball are interlocked by a drive gear 11) attached to the output shaft on the upper side of the motor and a passive gear (43) attached to the other upper roller shaft (42B).
B), and the passive gear (43B) is attached to one of the upper lobe shafts (42A).
This is possible by biting A)'. The passive gear (43A) is moved by the movement of the bearing stand ■.
) can be detached at will.

The cutting device αG is housed in a common bracket with the feeding device. In other words, long film (
9) Fix the clamping device (goods) on the other side of the transfer route that has been completely recovered.
is provided, and this fixed clamp tool 61) is attached to a bracket (support)) with a pair of upper and lower bars (53aX53b) fixed via a plate Q, and these bars (53a) (
Clamp bar (54aX54) attached to the front of the
b) and guides (55a) (55b) housed on the upper and lower opposing surfaces of both pars (53aX53b). The same applies to the movable clamp (58) provided on one side of the transfer path, and the mounting is performed by a pair of upper and lower pars (58a) (58b) disposed on the plate (57), and these pars (58).
Install the following clamp bar (59aX) on the front of the aX58b).
59b) and guides 60a) (60b) attached to the upper and lower opposing surfaces of both pars (58a) (58b),
When installing, do not fix plate 67) to the bracket group.
The movable clamp tool can be moved toward and away from the fixed clamp tool, and two upper and lower clamp parts are formed by the clamp bars (54aX59a) and (54bX59b) facing each other in the lateral direction. The drive device for moving the movable clamp f4 consists of a cylinder device fixed to the bracket side via a flange 61), and the piston rod facing the fixed clamp device 6) has a movable frame that is connected to the actuating part. The rings are connected. Both ends of the movable frame Q are prevented from wobbling by being guided by rail members placed on the side of the box 101. A plurality of rods are disposed on the movable frame ring so as to be movable in the length direction via a bearing device, and a stopper is attached to the rear end of these rods. When installing the tool, the plate support is fixed. A spring t18e, which is an elastic member, is installed between the plate and the movable frame by fitting it onto the rod ring, and this spring biases the movable clamp tool (2) to project. The movable frame has a cutting tool...
is fixed. This cutting tool is rod-shaped and has a plurality of ridges (two in the example) in the lateral direction, and the ridge at the tip is one of the guides (60a
) between the two pump parts. In addition, the cutting tool is set so that when the movable clamp tool (to) protrudes the most in the spring-loaded position, the peak part is located at a position slightly retracted from the working surface of the clamp bar (59a) (59b). It is.

The cutting position mark of the perforation α4 by the cutting device αG and the intermediate position (C1) between the stop position (Bl) where the lower end (9a) of the long film (9) reaches during cutting, and the lower end (
For example, a phototube type detection device that detects 9a)! 4e
is provided. This detection device is connected to a timer means (c) whose set time can be freely adjusted via a pulse generating means η so as to activate the timer means 061 at the same time as detection. The timer means is configured to stop the motor of the feeding device 4 when the set time has elapsed, and to fully operate the cylinder device □□□ of the cutting device Qt9.

Next, the operation of the sheet material cutting device will be explained. Rewinding device - A long film (9) that can be continuously rewound is
Outfit! (2) It is drawn in by the intermittent operation, and then a predetermined length is sent out downward, and then it is held and conveyed downward by the downward conveyor @. In other words, the end pulse (El
The motor □□□ is started, and its intermittent rotation is transmitted to the upper rollers (3QA) (30B) via the drive gear unit 9 and both driven gears (43A) (43B), and both spring belts (32AX32B)' As a result, the long film (9) is conveyed while being held between the two spring bells (32A) (32B), and static electricity is removed by the static electricity removal bar (32B). When inserting the end of the long film (9), the operating handle G71 moves the bearing stand 1331 apart against the spring □□□, causing both spring bells (32A) (32B) to open and separate. When the lower end (9a) of the ultra-long film (9) that has been fed down by a predetermined mcH,) as described above reaches the intermediate position (C), this lower end (9a) is detected by the detection device -〇, The detection signal (Fl is the pulse generating means (4)
71, and the detection pulse (Gl) from this pulse generating means-force is given to the timer means decoy.

From here the timer means decoy is timed and the set time (
When T has elapsed, the output I from the timer means 1461 is given to the sending device υ and the cutting device Q0.

Here, the timer means (setting time (count) of 461) (
11 is the feed amount (H2) from the intermediate position (C1 to the stop position (Bl) and the feed speed (Vl) of the feeding device (2).
tx/sec, T=V is determined, and as a result, when the set time (T) elapses, the long film (9
)'s sewing machine opening α fathom T-oppose the cutting A wheel. The aforementioned output I causes the motor to stop and the cylinder device to extend. Then, the movable clamp members move forward together with the movable frame via the spring, and first the clamp bars (54a) facing each other move as shown by the solid line in FIG.
X59a), (54b) and (59b) are used to pump the upper and lower parts of the α field at the sewing machine mouth. And a movable frame on the top.
When the movable frame moves forward, the movable frame moves against the spring against the movable clamp in the fixed position, and the clamping force is increased by the compression of the spring. In this state, the cutting tool comes into contact with and penetrates the perforation α4, thereby breaking (cutting) the perforation αIO as shown by the imaginary line in FIG. Thereafter, the movable clamp tool (2) moves away due to the contraction of the cylinder device (2). With this, one process is completed, and the motor is started by the end pulse (El), and the long film (9) is fed down again.
8) is sent down by the down conveyor CI), but it is pulled out by the air force supplied at that time, and is sent down faster than the feeding speed (■), causing the long film (9
) ensures reliable detection of the lower end.

Effects of the Invention According to the present invention having the above configuration, the lower end of the sheet object is detected in the middle part of the sheet object feeding path which is hardly affected by the wind, and from this point of detection, the timer means is activated and the set time is Because the feeding device is stopped when the feeding time has elapsed, even if slipping or elongation occurs during feeding, even if the manufacturing pitch of the secondary perforation is disordered, and even if there is air flow due to air supply at the bottom, etc. too,
The perforation can always be opposed to the cutting device within the allowable deviation range, and accurate cutting can be performed.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway rear view of the sheet material cutting device, FIG. 2 is a partially cutaway plan view of the same, and FIG. 3 is a cross-sectional plan view of the main parts. , Fig. 4 is an explanatory diagram of the operation of the main parts in Fig. 1, Fig. 5 is a circuit diagram, Fig. 6 is a waveform diagram, Fig. 7 is a perspective view showing the equipment for inserting the film bag into the case, and Fig. 8 is 9 is a rear view of the same, FIG. 10 is a plan view of the same, and FIGS. 11 to 13 are general W8 perspective views showing the operating state of the main parts. (1)...Film bag (m) R equipped, (3)...Main conveyor, (8)...Film bag, (9)...Long film (sheet material), (9a)...・Lower end, αυ...unwinding device, @...feeding device, α3...welding part, α slope...perforation part, αQ...cutting device, αη・
...Opening device, (32A) (32B)...Spring belt, 3 &...Motor, (40...Detection device, Frame...Timer means, GD...Fixing clamp tool, (5
3aX53b) = - par, (54a) (54b) -
Clamp bar, (A)...Movable clamp A, (58
aX58b)...bar, (59a)(59b)...
・Clamp bar, r3... Cylinder device (drive device), ■... Movable frame (actuating part), Link... Rod, (Foundation)... Spring (elastic member), -... Cutting Ingredients. Agent Yoshihiro MorimotoFigure 1
2

Claims (1)

[Claims] 1. A sheet material having perforations at regular intervals in the length direction is intermittently transported downward by a feeding device, and while the feeding device is intermittently stopped, the perforations are cut by a cutting device installed below the feeding device. A sheet material cutting method comprising:
A detection device is provided at an intermediate portion of the sheet material feeding path by the feeding device, and when the detection device detects the lower end of the sheet material, a timer means is activated, and when the timer means has elapsed a set time, the feeding device is activated. A method for cutting a sheet material, characterized by stopping the cutting device and activating the cutting device.