JPH06171621A - Method and device for detecting biting of object to be packed by pillow type packing machine - Google Patents

Abstract

PURPOSE:To detect a biting of an object to be packaged at the time of heat- sealing surely by a method wherein a vibration which is generated when a cylindrical form packing material is sealed by heat-sealing is detected, and the scale of this vibration is compared with a specified value. CONSTITUTION:For a heat-seal mechanism, an upper sealer 11 equipped with a cuter blade and a lower sealer 12 equipped with a cutter base pinch a cylindrical form packing material from the top and bottom and come into contact, by the rotation of upper and lower shafts 13, 14, and a pillow type packed body is manufactured by cutting the cylindrical form packing material at the same time with the heat-sealing. To a structure 25 which axially supports the upper shaft 13 and lower shaft 14, a vibration sensor 23 is attached by screwing, and the screwing location of the vibration sensor 23 is at an intermediate part between the upper shaft 13 and lower shaft 14. A detecting signal from the vibration sensor 23 is input in a control unit which is electrically connected, and compared with a specified value in the control unit. By this method, whether is a biting of the object to be packed or not can be judged extremely accurately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trapping detection method for a pillow packaging machine for detecting the trapping of an object to be packaged in a heat-bonded portion of a pillow package, and a detection apparatus using the same.

[0002]

2. Description of the Related Art FIG. 1 is an overall configuration diagram showing an example of a pillow packaging machine to which the present invention is applied, and FIG. 2 is a sectional view for explaining its heat sealing mechanism. Generally, in a pillow packaging machine, an inflow side conveyor 15 and an outflow side conveyor 16 which convey a continuous tubular packaging material 32 in which an article to be packaged 30 is inserted at a predetermined interval are provided between each of the conveyors. Pillow wrapping body 31 is provided by sandwiching the tubular wrapping material from above and below and thermally adhering and sealing the tubular wrapping material, and cutting the tubular wrapping material at the thermal adhesive portion.
And a heat-sealing mechanism for manufacturing.

[0003] Here, the inflow side conveyor 1 of the pillow packaging machine.
5. As shown in FIG. 5, the tubular packaging material 32 on the top 5 is overlapped with, for example, a plate-shaped strip package in which a plurality of tablets and capsules are package-wrapped, various confectionery, package inserts, etc. The ones are inserted at a predetermined interval. Then, the tubular wrapping material 32 is moved toward the heat-sealing mechanism by the inflow side conveyor 15, and the tubular wrapping material is heat-sealed and sealed between the articles to be packaged from above and below, and at the same time, the tubular wrapping is performed. Pillow wrapping body 3 in which the material is cut and the article to be packaged 30 is housed inside
1 is manufactured. Also, each pillow package is conveyed by the outflow side conveyor to a boxing device downstream of the outflow side conveyor.

By the way, when the above-mentioned thermal bonding and sealing are performed,
If the timing of sending the packaged material to the tubular packaging material is shifted, or if the packaged objects that have been sent to the tubular packaging material and then stacked on top of each other slip and deviate slightly, When heat-bonded together with the strip-shaped packaging material, so-called biting of the packaged object may occur.

Conventionally, as a method of detecting the bite of the packaged object in the pillow packaging machine, there is known a method of detecting the thickness of the heat-bonded portion of the pillow package by, for example, a transmissive displacement sensor. However, in the method of detecting the thickness, every time the material of the packaging material or the content of the packaged item changes,
It is necessary to readjust the set thickness finely, and there is also a problem in detection accuracy, which often causes a detection error.

[0006] A defective pillow package that bites the packaged object is
Shipping, even if only one, greatly impairs the reliability of quality as a manufacturer. For this reason, in order to completely check the defective pillow packages, a method in which all of them are inspected by skilled inspection personnel is generally performed. However, even in this case, the occurrence of human error cannot be avoided, and it is not preferable to continue the monotonous inspection work accurately for a long time.

[0007]

DISCLOSURE OF THE INVENTION As a result of intensive studies conducted by the present inventors in view of the above-mentioned circumstances, the sound generated when sealing by heat bonding is slightly different between the normal sound and the occurrence of bite. It was found that the present invention has been completed,
An object of the present invention is to provide a method and a device for detecting a bite of a packaged object at a heat-bonding portion in a pillow packaging machine.

[0008]

SUMMARY OF THE INVENTION A trapping detection method for a pillow packaging machine according to the present invention detects a vibration generated when a tubular packaging material is heat-bonded and sealed, and the magnitude of the vibration is set to a predetermined value. It is characterized by determining whether or not there is any bite in the packaged object by comparing with.

Further, the trapping detection device of the pillow packaging machine according to the present invention compares a vibration sensor for detecting a vibration generated when heat-sealing and sealing, and a detection signal output from the vibration sensor with a predetermined value. However, it is characterized in that it is provided with a bite determination means for determining whether or not the packaged object is bitten.

The vibration detected in the present invention is generated when the tubular packaging material is heat-bonded and sealed,
It is sufficient that the detected frequency is in the audible range, and preferably, the low frequency component generated from the motor, machine or the like is cut. Such a frequency is, for example, 4
A range of 0 Hz to 10 kHz can be mentioned.

The place for detecting the above-mentioned vibration is not particularly limited as long as it is a place where the vibration generated during sealing by heat bonding is detected, and for example, it is connected to a heat seal mechanism or a heat seal mechanism. Examples thereof include structures. The heat seal mechanism is not particularly limited, and examples thereof include a system in which a cutter sealer for sealing and cutting by heat bonding rotates, and a system in which an opposing cutter sealer moves up and down. In the case where the heat seal mechanism is one in which the shafts having the protruding cutter sealers are arranged so as to face each other in the vertical direction, it is preferable that the vibration sensor can be attached to the structure supporting the shafts.

Vibration at the time of sealing detected by the vibration sensor is
The occurrence of biting can be detected by comparing the vibration level with the vibration level in the normal case. That is, for example, the vibration level in a normally sealed state is read as a detection signal from the vibration sensor, and a vibration level slightly higher than that is set as a set level, and the vibration level at the time of sealing is higher than the set level. When it is larger, it is determined that the heat-bonded portion has been bitten. Note that the set level may be set in advance by programming a program and automatically calculating it from the vibration level in the normal state.

[0013]

In the pillow packaging machine, when the object to be packaged is sealed by sealing, the vibration generated at the time of sealing becomes larger than the vibration at the time of normal sealing. Therefore, by detecting the vibration level generated at the time of sealing and comparing it with the vibration level at the normal time, it is possible to determine whether or not there is any bite.

[0014]

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

The pillow wrapping machine shown in the figure feeds the roll-shaped wrapping material 1 by the feeding roller 3, the feeding roller 7 and the like in the arrow direction, and wraps the article to be wrapped 30 while continuously making it into a tubular shape by the bag making device 6. After heat-bonding the substantially central portion of the cylinder with the center seal roller 8, the inflow side conveyor 15 and the outflow side conveyor 16 are moved in the arrow direction at a predetermined conveying speed.

Inflow side conveyor 15 and outflow side conveyor 16
A heat-sealing mechanism is provided between and. The heat seal mechanism includes an upper cutter seal roller 9 having an upper cutter toothed sealer 11 provided with a heat seal portion and a cutter projecting from an upper shaft 13, and a lower cutter base sealer provided with a heat seal portion and a cutter base. 12 is provided so as to face the lower cutter seal roller 10 provided on the lower shaft 14 so as to face each other. By rotating the upper and lower shafts 13 and 14, the upper cutter teeth are provided. The sealer 11 and the lower cutter base-equipped sealer 12 are tubular packaging materials 3
The pillow packaging body 31 is manufactured by sandwiching and abutting 2 from above and cutting the tubular packaging material 32 at the same time as heat bonding.

A vibration sensor 23 is screwed to a structure 25 that supports the upper shaft 13 and the lower shaft 14. The screwing position of the vibration sensor 23 is an intermediate portion between the upper shaft 13 and the lower shaft 14, and is provided at a place where it does not interfere with various wirings. The detection signal from the vibration sensor 23 is input to the control unit 40 electrically connected.

The enclosed pillow package 31 is conveyed from the outflow side conveyor 16 to the weight check conveyor 17 and further to the discharge conveyor 18. The weight check conveyor measures the weight of the pillow package, and the signal is input to the control unit 40, where it is determined whether or not it is within a predetermined weight range. Pillow packages not having a predetermined weight are removed by a sorting flipper 20 described later.

A photoelectric tube 24 is provided between the outflow side conveyor 16 and the weight check conveyor 17, and it is possible to detect the passage of the pillow package by blocking the light by the pillow package. The signal from the phototube 24 is also input to the control unit 40.

The discharging conveyor 18 is provided with sorting flippers 19 and 20 for removing defective pillow packages. In the present embodiment, the sorting flipper has a structure in which an elongated plate-like object is attached to the shaft, and the rotation of the shaft prevents the plate-like object from conveying the defective pillow package by the discharge conveyor 18, thereby causing the defective pillow. The package can be removed to the defective pillow package receiving boxes 19 and 20.

In this embodiment, the pillow package having a bad bite is put into the box 21 for receiving a defective package by the sorting flipper 19, and the pillow package having a bad weight is received by the flipper 20 for sorting the pillow package having a bad weight. The boxes 22 are respectively excluded. If both defects overlap, the defective biting is prioritized. In addition, when the bite is detected, the pillow package is removed before and after the heat-bonded portion in which the bite has occurred.

[0022]

According to the present invention, it is possible to determine whether or not there is any bite in the packaged object by detecting the vibration generated when sealing by heat bonding and comparing the detected signal with a predetermined value. It can be determined extremely accurately.

Further, the bite detection device of the present invention compares a vibration sensor for detecting a vibration generated when heat sealing and sealing, and a detection signal output from the vibration sensor with a predetermined value, and the packaged product is packaged. By providing the means for determining whether or not there is a bite of the object, the bite of the packaged object at the time of heat bonding can be reliably detected during the heat bonding operation.

By providing the pillow wrapping machine with the bite detection device of the present invention, a pillow wrapping body having a defective bite can be approximately 10
It will be possible to eliminate 0%, and the inspection personnel that were used in the past will not be needed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an example of a pillow packaging machine to which a bite detection device of the present invention is applied.

FIG. 2 is a sectional view illustrating a heat seal mechanism.

FIG. 3 is an explanatory diagram showing a method of attaching a vibration sensor.

FIG. 4 is a perspective view illustrating a discharge mechanism of a pillow package.

FIG. 5 is a block diagram showing a configuration inside a control unit.

[Explanation of symbols]

 1 Rolled packaging material 2 Encoder 3 Feeding roller 4 Registration mark sensor 5 Supply chain 6 Bag making device 7 Feed roller 8 Center seal roller 9 Upper cutter seal roller 10 Lower cutter seal roller 11 Upper cutter toothed sealer 12 Lower cutter base Sealer 13 Upper shaft 14 Lower shaft 15 Inflow side conveyor 16 Outflow side conveyor 17 Weight check conveyor 18 Ejection conveyor 19,20 Sorting flipper 21 Bad bite pillow package receiving box 22 Bad weight pillow package receiving box 23 Vibration Sensor 24 Phototube 25 Shaft support structure 30 Packaged item (content) 31 Pillow package 32 Cylindrical packaging material 40 Control unit

Claims (2)

[Claims] 1. An inflow-side conveyor and an outflow-side conveyor that convey a continuous tubular wrapping paper in which articles to be packaged are inserted at a predetermined interval, and an upper side and a lower side provided between the respective conveyors. In a pillow wrapping machine comprising a heat-sealing mechanism for producing a pillow wrapping body by cutting the tubular wrapping material by heat-sealing by sandwiching the tubular wrapping paper from the direction and cutting the tubular wrapping material at a heat-bonding portion, A pillow characterized in that it is determined whether or not there is any bite of the object to be packaged by detecting the vibration generated during the heat-sealing and sealing and comparing the magnitude of this vibration with a predetermined value. A method for detecting jamming in packaging machines. 2. An inflow-side conveyor and an outflow-side conveyor that convey a continuous tubular packaging material in which articles to be packaged are inserted at predetermined intervals, and are provided between the respective conveyors, and are provided above and below. In a pillow wrapping machine comprising a heat seal mechanism for producing a pillow wrapping body by cutting the tubular wrapping material by heat-sealing by sandwiching the tubular wrapping material from the direction, and sealing. A vibration sensor that detects vibrations that occur when heat-sealing and sealing is performed, and a detection signal that is output from the vibration sensor is compared with a predetermined value to determine whether or not the packaged object is caught. An entrapment detection device for a pillow packaging machine, comprising: entrapment determination means.