JP2011189607A - Apparatus for detecting positional deviation of punched hole and bag making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for detecting the positional deviation of a punched hole, in which the positional deviation of the punched hole on a bottom material is detected to suppress production of defective products. <P>SOLUTION: The apparatus for detecting the positional deviation of the punched hole, which is used for detecting the positional deviation of the punched hole bored on the bottom material when the films of a body material and the bottom material of a soft packaging bag standing pouch are sealed with each other when stopping an intermittent feeding, includes: a film nipping means for nipping the layered films of the body material and the bottom material; a means which is arranged at the film nipping means, has the principle of leverage and thickens the film; and an optical path cutoff detection means arranged at the tip of the means for thickening the film. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an apparatus for in-line detecting a shift of a position of a punch hole drilled in a bottom material with respect to a pattern printed on a body material in a bag making process of a standing pouch which is one of soft packaging bags.

  The object of the present invention is a bag making process in a standing pouch. The basic forms of soft packaging bags that are manufactured by a bag making machine from roll-wrapped soft packaging film base materials are two-side seal type, pillow type (back-bonded palm), three-side seal type, bottom gusset type There are side gusset types, standing pouches, etc., which are appropriately selected depending on the application.

  An example of a standing pouch is shown in FIG. Consists of a body material 1 and a bottom material 2. The bottom material is folded in half and inserted into the bottom portion of the body material, and both sides and the bottom portion of the pouch are sealed. Both sides are sealed between the front and back body, and the bottom is sealed between the body and bottom. In addition, punch holes 3 are drilled in the bottom material on both sides of the bottom part, the body materials are sealed through the punch holes, and both sides of the bottom part are closed through the punch holes. Is granted. However, when the punch hole is displaced with respect to the printed pattern, the seal portion is displaced. In this case, after cutting along the printed pattern, the standing pouch cannot be provided with independence, resulting in a defective product.

  As one of the bag making processes of the standing pouch, there is a system shown in FIG. The original fabric 4 printed with the front and back images printed on the two sides is unwound and slit in the front and back in processing step 5, with the front and back body facing up and down. The direction is changed and sent out. Further, in this processing step 5, it also serves as an accumulator between the raw material continuously unwound and the subsequent sealing step by intermittent feeding of the film. In addition to the body material, the bottom material web 7 is unwound and punched by the punch 6 at an equal pitch. In addition, this process is 2 chamfering, and the bottom material is sent to the left and right for each pattern with respect to the body on which the pattern is printed for chamfering. Thereafter, as shown in FIG. 3, the front and back body materials and the bottom material are overlapped. At this time, the bottom material is folded in half. In addition, the pattern printed on the body material is superposed and sent so that the punch holes drilled in the bottom material are located at predetermined positions. Next, a bottom seal 8 is formed, and each portion of the bottom seal folded in half is sealed to the front and back body members. At this time, the front and back body members are also sealed through the punch holes in the bottom member. Then, the front and back body materials on both sides of the pouch are sealed by the horizontal seal 9. Finally, it is cut into a product shape by the outer peripheral punching machine 10 and carried out by the delivery device 11. In addition, each process after the process process 5 is performed at the time of the stop of a film intermittent feed.

In such a standing pouch bag making process, the bottom material and the body material perforated at an equal pitch are overlapped and nipped and fed simultaneously. At this time, as shown in FIG. 3, the punched holes 3 drilled in the bottom material are positioned and sent with respect to the pattern printed on the body. Concerning the feeding of the body, the film is fed accurately by using a phototube etc. to feed back the position on the line when the feed is stopped to the picture of the body and controlling the motor for feeding the film. The method is generally adopted. However, the bottom material is sent in a state of being sandwiched between the upper and lower bodies and cannot be visually recognized from the outside. Therefore, such measures are not taken for the bottom material.For example, the bottom material is caught in the guide for preventing meandering of the film, and the bottom material is stretched every time the intermittent feeding process is performed. The elongation of the bottom material is integrated, and as a result, the bottom material and the bottom material are sealed with the punch holes in the bottom material shifted relative to the pattern printed on the body material, and then match the printed pattern. After cutting, the seal portion is shifted with respect to the product shape, so that the pouch cannot be provided with independence, and a defective product is generated. The yield can be improved by detecting the position deviation of the punch hole in-line and taking measures immediately after the detection.

  Therefore, a method of performing punch holes in the bottom material by detecting the thickness of the laminated films can be considered.

  The thickness is often measured as described below. For example, Patent Document 1 discloses an invention relating to a mechanism for transmitting a thickness of a sheet material to a photo interrupter installation portion via a lever as a thickness detection device for detecting double feeding of a sheet material in a sheet in an image reading apparatus. It is stated.

  Patent Document 2 describes an invention relating to a roller mechanism that clamps a print medium that detects the thickness of the print medium in order to appropriately manage the gap between the print head and the print medium in the printing apparatus.

JP 2000-296945 A JP-A-7-101589

  As described above, a mechanism is generally used in which a film is sandwiched from above and below by a roller to measure the thickness of the film and mechanically amplified using this principle and transmitted to a sensor unit. However, in the above method, even if the thickness of the film can be detected, the problem of accurately detecting the position of the punch hole in the bottom material is not solved.

  Therefore, an object of the present invention is to provide a punch hole position deviation detection device that detects the position deviation of a punch hole in a bottom material and suppresses the occurrence of defective products.

As a means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that the bottom material is perforated when the body of the flexible packaging bag stand-in pouch and the film of the bottom material are sealed when the intermittent feeding is stopped. In the punch hole position deviation detection device that detects the deviation of the punch hole position,
Film clamping means for clamping a film in which a body and a bottom material are laminated;
Means for amplifying the film thickness provided in the film clamping means and having the principle of lever;
A punch hole position deviation detection device comprising: an optical path interruption detection means provided at a tip of the means for amplifying the film thickness.

According to a second aspect of the present invention, there is provided a punch for detecting a displacement of a punch hole punched in a bottom material when sealing the body of the flexible packaging bag stand-in pouch and the film of the bottom material when the intermittent feeding is stopped. In the hole position deviation detection device,
Film clamping means for clamping a film in which a body and a bottom material are laminated;
Means for amplifying the film thickness provided in the film clamping means and having the principle of lever;
A displacement detecting means provided at the tip of the means for amplifying the film thickness;
A punch hole position deviation detection device comprising: film conveyance information acquisition means for acquiring the film conveyance information.

  According to a third aspect of the present invention, in the punch hole position deviation detecting device according to the first or second aspect, the film clamping means includes a detection roller, and an outer peripheral portion thereof has an R shape.

  A fourth aspect of the present invention is a bag making machine including the punch hole position deviation detecting device according to any one of the first to third aspects.

  With the punch hole position deviation detection device and bag making machine of the present invention, in the bag making process of the soft packaging material standing pouch, the punch hole position deviation is detected on the bag making machine by measuring the thickness while acquiring the film conveyance information. It is possible to detect with high accuracy, and when the positional deviation of the punch hole is detected, by stopping the bag making machine, it is possible to suppress the occurrence of defects due to the positional deviation of the punch hole.

Explanatory drawing of a standing pouch. The figure which shows an example of a standing pouch bag making process. Explanatory drawing of the film in a standing pouch bag making process. Schematic of a punch hole position deviation detection device. The comparison figure of the time waveform of the encoder signal installed in the motor for film feeding in bag making, and the time waveform of the signal of the displacement sensor in the state of various punch hole position shifts. Explanatory drawing of the bag making machine line which installed the punch hole position shift detection apparatus which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 4 is a schematic view of a punch hole position deviation detecting device according to the present invention. The film clamping means for clamping the film in which the body and the bottom material are laminated will be described. The fixed roller 14 uses a ball bearing, and the detection roller 13 uses a machined roller that employs engineering plastic as a material so that the film 18 is not damaged. A means for amplifying the film thickness will be described. In the lever 15 in which the detection roller 13 is rotatably fixed to one end, for example, the lever ratio is set to 1: 7 with the fulcrum 12 as the center. The bottom material uses a film having a thickness of, for example, 0.3 mm, and the difference in swinging of the other end of the lever with and without the punch hole is 2.1 mm. This lever is applied with a counterclockwise force using a tension spring 17. An inexpensive microphotosensor is used for the light path block detector 16 which is a light block detector. The other end of the lever has a slit, and if there is a punch hole, the optical axis of the sensor is transmitted through this slit. If there is no punch hole, the thickness of one layer of the bottom material is between the rollers. In addition, the lever swings around the fulcrum, and the optical axis of the sensor is shielded by a portion where there is no slit at the other end of the lever. The sensor was wired so that it was turned off when light was blocked. The sensor is connected to the sequencer. From this ON / OFF signal and the film feed signal, when the output of the sensor is OFF when the intermittent feed of the film is stopped, the bag making machine is emergency stopped and an alarm is sounded. It is programmed.

  Another punch hole position deviation detection device according to the present invention uses a displacement sensor as a displacement detection means instead of the optical path interruption detector 16 as the light interruption detection means. Moreover, the film conveyance information acquisition means which acquires the conveyance information of a film is provided. For example, a rotary encoder is installed in a film feed motor. At this time, FIG. 5 shows a comparison of the time waveform of the displacement signal due to various displacement states of the punch holes and the time waveform of the film feed by the encoder. A is a time waveform of the film feeding by the encoder. A broken line portion where no pulse signal is sent indicates when the intermittent feeding of the film is stopped. B is a time waveform of the signal of the displacement sensor when the punch hole is in a normal position. C shows a time waveform of the signal of the displacement sensor in a state where the punch hole is slightly displaced. The state where the punch hole is slightly displaced means that the punch hole has a width in the film flow direction, and even if the punch hole is slightly displaced in the flow direction, the thickness of the film sandwiched between the detection roller 13 and the fixed roller 14 is changed. It refers to such a state. D shows the time waveform of the signal of the displacement sensor in a state where the punch hole is completely displaced. The state in which the punch hole is completely displaced refers to a state in which the thickness of the film sandwiched between the detection roller and the fixed roller is changed by being displaced by the width of the punch hole or more.

  When the optical path block detector 16 which is a light blocking detector is used, that is, according to a method of measuring the film thickness of the punch hole when the film feed is stopped, the punch hole is completely displaced. In the state, a change occurs in the measured thickness, and punch hole deviation can be detected. However, in the state where the punch hole is slightly displaced, there is no change in the measured thickness, and the punch hole position deviation cannot be detected. Therefore, the invention relating to claim 2 compares the time waveform of the film feed with the time waveform of the displacement sensor. When the waveforms of B and C are compared, the signal waveform itself does not change and is shifted with respect to the time axis. Therefore, in comparison with the time waveform of the film feed by the encoder, a time axis reference is provided for the time waveform of the displacement sensor, such as when the film is stopped, and the difference between the waveforms of B and C is detected. For example, a displacement signal at the time of one film intermittent feed is logged by using a film feed start signal and a film feed stop signal by an encoder signal as triggers. Then, for example, the time t2 in FIG. 5 is calculated by data processing and compared with the time of the reference value t1. Thereby, the difference between the waveforms of B and C, that is, the minute positional deviation of the punch hole can be detected. The present invention also includes an alarm mechanism that sounds an alarm for the detection of the punch hole position deviation. Although the final product may not be a defective product when the punch holes are slightly misaligned, the production of defective products can be prevented by detecting signs of poor feeding of the bottom material in advance. Can be improved.

  In the punch hole position shift detection device according to the present invention, the outer peripheral portion of the detection roller 13 is not flat but has a shape with an R. When the outer peripheral portion of the detection roller is flat, the corner of the roller hits the film, which may damage the film. Therefore, in the present invention, the outer peripheral portion of the film has a shape with an R to prevent the film from being damaged.

  FIG. 6 is an explanatory diagram of a bag making machine line in which the punch hole position deviation detecting device according to the present invention is installed. The punch hole position deviation detection device 20 was fixed to the bag making machine frame behind the vertical seal 8. In addition, the punch hole position deviation detection device 20 is provided with a linear guide (not shown) in the line flow direction and width direction so that the position can be adjusted so that it can cope with a change in the type of bag-made products.

  Whether the punch unit can be detected by shifting the punch unit from the normal position by shifting the position upstream and downstream, respectively, flowing the film to the bag making machine line, shifting the punch hole, and making the bag. And verified. As a result, when the punch hole was displaced by more than the width of the punch hole in the flow direction, the punch hole position deviation could be detected.

  Thus, with the punch hole position deviation detection device and bag making machine of the present invention, the position of the punch hole in the bottom material, which has not been monitored in the past, is determined by the film thickness in the flexible packaging material standing pouch bag making process. By measuring and simultaneously detecting the transport length of the film, it is possible to detect minute positional deviations in the punch holes in the bottom material, and when a positional deviation is detected, the bag making machine is stopped. In addition, by removing the cause of the defect, it is possible to suppress the positional deviation defect of the punch hole in the bottom material.

DESCRIPTION OF SYMBOLS 1 ... Body material 2 ... Bottom material 3 ... Punch hole 4 ... Body material raw material 5 ... Process 6 ... Punch 7 ... Bottom material raw material 8 ... Vertical seal 9 ... Horizontal seal 10 ... Outer peripheral punch 11 ... Delivery device 12 ... Support point 13 ... Detection roller 14 ... Fixed roller 15 ... Lever 16 ... Light path interrupting detector 17 ... Spring 18 ... Film 20 ... Punch hole position deviation detector A ... Encoder signal B ... Displacement sensor when the punch hole is in the normal position Signal C ... Displacement sensor signal when punch hole is slightly displaced D ... Displacement sensor signal when punch hole is completely displaced

Claims (4)

In the punch hole position deviation detecting device for detecting the deviation of the position of the punch hole punched in the bottom material when sealing the body of the flexible packaging bag standin pouch and the film of the bottom material when the intermittent feeding is stopped,
Film clamping means for clamping a film in which a body and a bottom material are laminated;
Means for amplifying the film thickness provided in the film clamping means and having the principle of lever;
A punch hole position deviation detecting device comprising: an optical path interruption detecting means provided at a tip of the means for amplifying the film thickness. In the punch hole position deviation detecting device for detecting the deviation of the position of the punch hole punched in the bottom material when sealing the body of the flexible packaging bag standin pouch and the film of the bottom material when the intermittent feeding is stopped,
Film clamping means for clamping a film in which a body and a bottom material are laminated;
Means for amplifying the film thickness provided in the film clamping means and having the principle of lever;
A displacement detecting means provided at the tip of the means for amplifying the film thickness;
A punch hole position deviation detection device comprising: film conveyance information acquisition means for acquiring the film conveyance information.   3. The punch hole position deviation detection device according to claim 1, wherein the film clamping means includes a detection roller, and an outer peripheral portion thereof has an R shape.   A bag making machine comprising the punch hole position deviation detecting device according to any one of claims 1 to 3.

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