JPH0487913A - packaging equipment - 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 [Field of Industrial Application] The present invention relates to a packaging device for wrapping packages in a heat-sealable film.

[Conventional technology]

Conventionally, in order to package a package, Utility Model Publication No. 58-45204
As proposed in the above publication, a bag made of a heat-sealable film is suspended and supported horizontally, and in this state, a package is accommodated through an opening on one side of the bag, and then the opening is heat-sealed. That's what I was doing.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, since a pre-sealed bag is used, it is necessary to purchase a commercially available bag, which is costly, and the bag is suspended and supported. Then, the opening must be opened using a suction member or the like to house the package, which poses a problem in that a complicated device is required for the process of opening the bag.

Therefore, by using the bi-folding mechanism proposed in Japanese Utility Model Publication No. 52-22525, etc., the strip film is folded in two by the bi-folding mechanism etc. while being continuously pulled out forward, and packaged in the bi-fold strip film. It is conceivable to seal the package by accommodating the body and performing three-sided sealing using a three-sided sealing device consisting of a rear part, an upper part, and a front part.

However, in the above case, when a heat-sealed portion is formed by accommodating a package of relatively expensive foodstuffs, such as mushrooms, in a bi-folded strip film, the film at the heel portion tends to loosen. It is expected that this will result in the formation of a heat-sealed portion with overlapping portions, which will reduce the commercial value.

Therefore, the present applicant clamps the upper edge of the front end in the traveling direction of the cylindrical film containing the package with a bag clamping mechanism, and seals and cuts the rear part while pulling this bag clamping mechanism in the film traveling direction by the weight of a balance weight. JP-A-1-2 discloses a device in which the rear part is sealed and cut by a device, and the cut bag is guided onto a tray by the bag clamping and feeding device to prevent the film from loosening at the sealed portion.
This is proposed by No. 26508.

However, if the packaged object is unsafe and high-tension, such as mushrooms, the first
As shown in Figures 4 (A) and (B), the largest part of bag A, such as the cap of the mushroom, gets caught in tray B and is not fed and guided to tray B in a normal condition, and in the worst case, the front end of bag A There is a risk that the clamping member C that clamps the bag will come off, leaving the bag A and that the clamping member C will move due to the weight of the balance weight. There was a problem in that the package housed in the bag A was cut.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a packaging device that can determine whether a film is being fed and guided to a tray in an appropriate state where it is sandwiched between sandwiching members.

[Means to solve the problem]

The present invention involves continuously drawing out a heat-sealable strip film forward, folding both ends of the strip film in half using a bifolding device, pulling out and guiding both ends of the bifold strip film upward, and then A package is housed in a folded strip-shaped film, the upper part of the folded strip-shaped film is sealed to form the film into a cylindrical shape, and the upper edge of the front end of the cylindrical film in the direction of travel is held between pinching members; While this clamping member is pulled in the film traveling direction by the weight of the balance weight, the rear part of the cylindrical film is sealed and cut by the rear sealing/cutting device, and the cut bag is transferred to a roughly U-shaped bag by the bag clamping and feeding mechanism. In a packaging device configured to guide the cylindrical film onto a shaped tray, the cylindrical film is transported onto the tray by the clamping member along the traveling direction of the cylindrical film, and is supplied to the sealing/cutting location of the cylindrical film. A first detection means for detecting the pinching member at a position is provided, and a second detection means for detecting the pinching member is provided forward of the first detection means in the film traveling direction, and the first detection means The rear sealing/cutting device is configured to operate only when there is no detection from the second detection means within a predetermined period of time after the detection of the second detection means.

[Effect]

With the above configuration, if the cylindrical film containing the package is caught in the tray and fed in an incomplete state and the film stops advancing, the first detection means will not detect the clamping member. Moreover, when the clamping member comes off from the cylindrical film, the clamping member moves instantaneously due to the weight of the balance weight, and as a result, the detection by the second detection unit is completed within a predetermined time after the detection by the first detection unit. The rear sealing/cutting device is not activated to prevent the package from being cut.

〔Example〕

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

1 to 13, reference numeral 1 denotes a machine base, and at the upper rear end of this machine base 1, a roll 3 of a sheet-sealable strip film 2 made of transparent polyethylene, vinyl, etc. is mounted on a support plate 4.
It is rotatably provided through. 5 is the roll 3
This is a device for folding a film strip 2 into two, which is provided in front of the folding device 2. This is a folding device for folding a film strip 2 in two, and this device is equipped with a folding member 6 having a triangular planar shape in a forward-inclined state that tilts downward as it moves forward through a support plate 4A. It is composed of This bending member 6 has tapered surfaces 7 on both sides thereof that incline inwardly as it moves upward, and a sharpened portion 8 having a 7-shaped side surface is formed at the front end. The bending member 6 is pivotally connected to the long hole 9 on the rear end side and the fixing part side where the string can be tightened by a link arm 12 that can swing via a pivot support 11, and the rear end side is high. By adjusting the angle, the inclination angle of the folding member 6 can be selected, and thereby the vertical positional relationship of the folded film strip 2A can be arbitrarily set. Further, a pair of left and right feed rollers 13 made of a hard elastic material are vertically disposed in contact with the front end of the bending member 6. Then, the strip-shaped film 2 continuously pulled out from the roll 3 by the means described later is guided to the bifolding device 5 via a plurality of guide rolls 14 and tension rolls 15, and is folded along the tapered surfaces 7 on both sides of the folding member 6. The bi-folded strip film 2 is formed into two by folding and folded in this way.
A is guided to the next process by the rotation of the feed roller 13.

Reference numeral 16 denotes an opening device provided in front of the bifolding device 5, and this device is composed of opening guide plates 17 each having a cross-section having a letter-shaped cross section and arranged in parallel to the left and right at a predetermined interval.

Then, the films 2B on both sides of the bi-folded strip film 2A guided by the feed roller 13 are sent along the outer surface of the opening guide plate 17, thereby forming an open part 18 at the interval between the left and right opening guide plates 17. be done.

In this open state, a package 19 made of, for example, enoki mushrooms is manually inserted into the bi-folded strip film 2A from the open portion 18.

20 is an upper sealing device installed horizontally in front of the opening device 16;
An upper plate 22 is mounted horizontally through the upper plate 22, and a pair of P1-seal members 23.23A having a predetermined length corresponding to the product are provided on the lower surface of the upper plate 22. In this case, one heat-sealing member 23 is fixed to the upper plate 22, and the other heat-sealing member 23A is provided so as to be movable forward and backward relative to the heat-sealing member 23 by a cylinder 24. Further, the heat sealing members 23, 23A are integrally provided with unpaired pinching members 25.25A, and the heat sealing member 23A is provided with a guide rod 26,
A coil spring 27 is wound around this guide rod 26. Further, a contact plate 28 is provided on the heat seal member 23A via a plate spring 29. Then, the cylinder 24 operates in a state where the upper edge of the portion of the bi-folded strip film 2A where the package 19 is housed is located between the heat sealing members 23 and 23A, whereby the heat sealing member 2
3A moves forward while compressing the coil spring 27 and is elastically pressed against the heat sealing member 23, and the upper end edge of the bifold strip film 2A forms a pair of pressing members 25.2.
The film 5A is elastically sandwiched and heat-sealed to form a cylindrical film 2B. In this case, the contact plate 28 comes into contact with the heat sealing member 23 side and the plate spring 29
is compressed. Therefore, as the heat-sealing member 23A retreats, the abutment plate 28 is restored to its original state and moves forward, thereby instantaneously separating the film 2A from the heat-sealing member 23A.

30 and 31 are installed at the front and rear ends of the lower surface of the upper plate 22, respectively.
a pair of feed rollers made of elastic material,
The bi-folded strip film 2A which has been pulled out from the roll 3 and folded in half is sent in a linear direction under pressure. The feed roller 13 and the feed roller 30 are connected to a motor 32 via a chain 33 and a sprocket 34 to drive the feed roller 31 and the feed roller 30.
and Held 35 and Boo! They are connected via J36 and driven so that they rotate in synchronization.

Reference numeral 37 denotes a pedestal having a substantially U-shaped cross section, which is disposed on the upper part of the machine base 1 along the film advancing path through the opening device 16 and the upper sealing device 20 to the front end position of the upper plate 22; Packaging body 1 housed in bifold strip film 2A
9 slides on the pedestal 37 as the film advances.

38 is a rear sealing/cutting device provided in front of the front end of the pedestal 37 and the upper plate 22; , cylinders 40 and 41 are installed horizontally inside each receiving plate 39, and guide rails 42 are installed on the front and rear sides of the upper part and the front side of the lower part between the left and right receiving plates 39, respectively. Further, the guide rail 42 has a pair of moving bodies 4
3.44 is slidably provided.

A cutter 46 is attached to one movable body 43 through a rail portion 45 so as to be movable back and forth, and a clamping portion 47 is provided on the rear side of the inner surface of the movable body 43. An entry/exit portion 48 is provided, and a heat seal portion 49 is provided on the front side of the movable body 43. Further, a pair of upper and lower guide rods 50 are protruded from the outer surface of the cutter 46 , a coil spring 51 is wound around the guide rods 50 , and a pushing body 52 is mounted opposite to the cylinder 40 .
The upper and lower ends of the pusher 52 are slidably fitted into the guide rod 50, and the pushing body 52 is prevented from being removed by a locking member 53 fixed to the end of the guide rod 50.

Further, a contact plate 55 is attached to the front surface of the movable body 43 via a plate spring 54.
In addition, a cooling water circulation path 56 is formed, and cooling water is supplied to this circulation path 56 from a water supply pipe 57 by a pump (not shown), circulates within the circulation path 56, and then is discharged from a drainage pipe 58. I'm trying to make it happen.

Further, the other movable body 44, which is disposed opposite to the one movable body 43, is attached to the cylinder 41, and has a clamping part 47 opposite to the clamping part 47 on the rear side of the inner surface thereof.
A is provided, an insertion groove 59 for the cutter 46 is provided in the center, and a bee 1-seal portion 49A is provided on the front side facing the heat seal portion 49, and A moving body 43.4 is mounted on the upper and lower guide rails 42.
A coil spring 60 having a weaker urging force than the coil spring 51 is wound between the coil springs 51 and 4.

Then, the cylindrical film 2B is attached to the pedestal 3 by means described later.
The cylinders 40 and 41 are moved forward by a predetermined distance from the front end of the upper heat sealing part 61 until the rear end of the upper heat sealing part 61 corresponds to the rear sealing/cutting device 38, and then the cylinders 40 and 41 are operated.

As a result, the piston of one cylinder 40 is moved to the pushing body 52.
The pushing body 52 is a coil spring 5L 60
The movable body 43 is elastically moved toward the center side, that is, one side of the cylindrical film 2B, and the other cylinder 4
The piston 1 elastically moves the movable body 44 toward the center side, that is, the other side surface of the cylindrical film 2B via the coil spring 60. As a result, both moving bodies 43.44
are in contact with each other and form a pair at the rear side position of the cutter 46.
7.47A, the front side of the cutter 46 is heat-sealed by the heat-sealed portion 49.49A to form a rear heat-sealed portion 62, and the cutter 46 immediately resists the bias of the coil spring 51. It moves forward, is inserted into the insertion groove 59, and is cut from the rear part of the rear heat-sealed part 62, and in this way, a bag is made with the package 19 housed therein. In this case, the contact plate 55 is attached to the plate spring 5
4 is in contact with the inner surface of the moving body 44 in a compressed state. Thereafter, due to the retraction of the piston of the cylinder 40.41, the restoring force of the coil spring 51.60 causes the movable body 43.
44 and the cutter 46 are returned to their original positions, and the restoring force of the leaf spring 54 causes the abutment plate 55 to move forward, and the film 2B is instantly separated from the heat-sealed portion 49.

In addition, since cooling water is circulated in the movable body 43, it is possible to prevent the heat seal portion 49 from being abnormally heated, and as a result, melting of the cylindrical film 2B can be prevented, resulting in a good seal. It can be performed. Further, cutting and heat sealing of the tubular film 2B may be performed simultaneously, or either cutting or heat sealing may be performed in advance, and this may be selected arbitrarily.

Reference numeral 63 denotes a bag clamping and feeding device for the tubular film 2B.
A pair of left and right guide rails 64 are installed between B and the upper plate 22 along the film traveling direction.
A sliding body 65 is slidably provided on 4. Further, on the rear side of the sliding body 65, unpaired clamping members 67 are provided which are opened and closed via a pivot portion 67A by the operation of the cylinder 66. Further, a cylinder 68 is provided on the upper plate 22 as a means for moving the sliding member 65 along the film advancing direction, and a movable element 69 is connected to the piston of the cylinder 68, and this movable element 69 is connected to the left guide rail 64. It is slidably provided. Further, the sliding body 65 is provided with a wire 7o.
One end of the wire 70 is fixed, and the wire 70 is guided by a pulley 71 provided at the front end of the machine base 1 and is suspended below the front end of the machine base 1, and the balance wade door 2 is provided at the end thereof.

Then, in a state where the front end of the tubular film 2B is sent to a position where the front end of the cylindrical film 2B protrudes from the front end of the pedestal 37 by the feed rollers 13, 30, 31, the feeding of the film is stopped, and the piston is contracted by the operation of the cylinder 68. As a result, the sliding body 65 having the clamping members 67 is pushed by the movable element 69 and moves backward against the tensile force of the balance wade door 2, and the pair of left and right clamping members 67 are opened to form the cylindrical shape. They are located on the left and right sides of the film 2B end. Here, cylinder 6
6 closes the clamping member 67 to clamp the cylindrical film 2B, starts feeding the film, and at the same time drains the fluid in the cylinder 68, the sliding body 65 equipped with the clamping member 67 becomes a balance wafer. The film is moved forward via the wire 70 by the tensile force of the door 2, and when the package 19 reaches a predetermined position, that is, a position close to the rear heat-sealing part 62, the feeding of the film is stopped. In this manner, when the tubular film 2B is stretched by the tensile force of the balance wade door 2 and is in tension, the rear sealing/cutting device 38 is activated by detection signals from the first and second detection means described later.
perform the following actions. Then, when the rear heat seal and film cutting of the cylindrical film 2B that has been pulled out and guided is performed, the bag 2C that has been made is separated from the cylindrical film 2B, and the sliding body 65 is moved by the tensile force of the balance wade door 2. As it moves, it moves further forward. In this case, there is a saucer described below below the bag 2c, and the bag 2C is placed on this saucer.

73 and 74 are switches for the first and second limits 1 as detection means provided along the traveling direction of the cylindrical film, and the first limit switch 73 is operated by the bag pinching and feeding device 63 to When the film 2B is transported to a predetermined position where rear heat sealing and film cutting are performed, the slider 65 of the clamping member 67 clamps the actuator 73A of the first limit switch 73 and the front end of the tubular film 2B.
It is fixed to a mounting plate 76 installed above the machine base 1 via a mounting stay 75 so that the two are engaged with each other. On the other hand, the second lamin 1 switch 74 is activated when the bag 2C has been conveyed by the bag clamping and feeding device 63 after the film has been cut.
Mounting stay 75 so that A and the sliding body 65 engage with each other.
It is fixed on the machine base 1 via.

77, for example, Utility Model Application Publication No. 59-35307, Utility Model Application Publication No. 5
This is a bag end twisting and front sealing device constructed using a part of the device proposed by the applicant in Publication No. 9-35308, etc., and this device is provided corresponding to the transfer location of the bag 2C. It has an endless con hair 78 that circulates in a direction perpendicular to the direction in which the film travels. A pair of front and rear endless chain bells l-81A are hung between the conhair 78, a sprocket 80 driven by a motor 79, and a sprocket 81 on the driven side.
A plurality of saucers 82 are attached to 1A at equal intervals. This tray 82 has a U-shaped cross section and is open at both ends forming a film traveling path. Further, flange-shaped stoppers 82B are formed to be bent inward on both sides of the opening 82A of the tray 82 in the film advancing direction. Further, in the front position of the right transfer end of the receiving tray 82, a sealing member 84 having a cylinder 83 and a heat sealing member 85 are provided vertically in pairs, and further in front thereof, an opening/closing operation by a cylinder 86 is provided. A rack 88 that is raised and lowered by a cylinder 87 and a plurality of clamping claws 90 that are rotated by a pinion 89 are provided. Further, a pair of left and right folding guide plates 91 are horizontally disposed corresponding to the upper part of the tray 82 on the film traveling path, and the left folding guide plate 91 is moved in the left-right direction by a cylinder 91A. In addition, the saucer 82
A deaeration member 93 made of a sponge or the like is provided which is raised and lowered by a two-way IJ cylinder 92 at the right transfer end.

Then, after the bag 2C containing the package 19 is guided onto the tray 82 and the end portion of the bag 2C is released, the conveyor 7
8 is driven and sent to the right, and the cylinder 91A
The left folding guide plate 91 moves by the operation. As a result, the excess portion of the upper part of the bag 2C is folded back into the guide plate 91.
It is transferred to the right by the receiving tray 82 while being folded back to the left, and stops at a location corresponding to the heat-sealing members 84 and 85. In this state, the degassing member 93 is lowered by the operation of the cylinder 92 to remove the air inside the bag 2C. While degassing is performed, the excess front part of the bag 2C is pinched and twisted by the clamping claws 90 by the operation of the cylinders 86 and 87, and then the front part is sealed by the heat sealing members 84 and 85 by the operation of the cylinder 83. A heat-sealed portion 94 is formed so that a three-sided sealed product can be obtained.

Next, the operation of this embodiment having the above configuration will be explained.

First, the strip film 2 is pulled out from the roll 3, passed through the guide roll 14 and the tension roll 15, and then folded into two along the tapered surfaces 7 on both sides from the rear surface of the folding member 6, and then passed through the front feed roller 13. Then, it is guided along both outer surfaces of the left and right pair of open guide plates 17 on the pedestal 37, and then sandwiched between the feed rollers 30, and then passed through the upper sealing device 20 and sandwiched between the feed rollers 31. set it to the correct state.

Here, when the device is driven, the motor 32 detects the colored portions printed on the film at equal intervals using a sensor (not shown), and then feeds the bi-folded strip film 2A into one bag 2C by the feed rollers 13, 30, 31. The motor 79 is driven intermittently at a feed pitch of a length corresponding to the length dimension, and the motor 79 is driven at a feed pitch such that the receiving tray 82 on the film transfer path is moved to a position corresponding to the front sealing device 77. It is configured to be driven intermittently upon detection of

Then, by the rotation of the feed roller 1'3, 30, 31, the strip film 2 is intermittently pulled out from the roll 3 by a predetermined length, and is folded in half by the folding member 6, and the bifold strip film 2A is folded into the feed roller 13. and feed roller 30
An open part 18 is formed at the upper part along the pair of left and right open guide plates 17 between the two and then stops. In this state, a package 19 of enoki mushrooms or the like is manually inserted into the bi-folded strip film 2A from the open portion 18 in alignment with a mark (not shown) marked on the pedestal 37.

Next, the bi-folded strip film 2A is transferred to the feed rollers 13, 3.
0.31, the package 19 moves intermittently to the pedestal 3.
The upper sealing device 2 is attached to the upper plate 22 by sliding on the top of the upper sealing device 2.
Film advance stops in a state corresponding to 0. here,
As the cylinder 24 operates, the heat sealing member 23A and the pinching member 25A advance toward the heat sealing member 23 and the pinching member 25 against the bias of the coil spring 27, and the upper part of the package 19 is folded in two. The open edge of the band-shaped film 2A is sandwiched between the pinching members 25.degree. 25A and heat-sealed by the heat-sealing member 2323A to form the upper heat-sealed portion 61, thereby forming the cylindrical film 2B.

In this case, the contact plate 28 comes into contact with the pressing member 25 side, and the leaf spring 29 is compressed. Then, as the piston of the cylinder 24 contracts, the heat seal member 23A and the clamping member 25A retreat due to the restoring force of the coil spring 27, and the contact plate 28
is instantly protruded by the restoring force of the leaf spring 29 and the cylindrical film 2
B is removed from the heat seal member 23A.

Next, by intermittent advancement of the film, the front end of the bi-folded strip film 2A, in which the package 19 is accommodated and the upper heat-sealed portion 61 is formed, is moved to the upper plate 22 and the feed roller 31.
Film advancement stops when the state of protrusion is reached. Here, the cylinder 68 operates and the sliding body 65 moves backward along the guide rail 64 via the movable element 69 while resisting the load of the balance wade door 2, and the clamping member 67 moves due to the operation of the cylinder 66. It is closed and the front end of the bi-folded strip film 2A is sandwiched. Next, film advancement is started, and the fluid in the cylinder 68 is drained, and the front end of the bi-folded strip film 2A is pushed forward via the wire 70 and the sliding body 65 by the load of the balance wade door 2 while being sandwiched between the sandwiching members 67. At the same time, the clamping member 67 closes due to the operation of the cylinder 66 and clamps the front end of the tubular film 2B. Next, film advancement is started, and the fluid in the cylinder 68 is removed, and the front end of the cylindrical film 2B in the advancing direction is held between the clamping members 67 and the wire 70 is moved by the load of the balance ways 1 to 72.
The tray 8 is pulled forward by a predetermined amount via the sliding body 65.
When the film stops advancing, the bi-folded cylindrical film 2B is pulled out and held in tension by the tensile force of the balance wade door 2. In this case, the sliding body 65 and the actuator 73A of the first limit switch 73 engage with each other at a position where the cylindrical film 2B is completely conveyed toward the receiving tray 82, and the first limit switch 73 is turned on. Only if the second limit switch 74 is not turned on within a predetermined period of time, the rear sealing/cutting device 38 in the next step is activated.

Next, when the cylinder 40.4 of the rear sealing/cutting device 38 operates, the pair of left and right moving bodies 43.44 are pushed toward the center along the guide rail 42 against the bias of the coil spring 60. The cylindrical film 2B close to the rear end of the package 19 is vertically sandwiched and sealed. In this case, the film 2B is pinched by the pair of left and right pinching parts 47.47A, and the front side of this pinching part is attached to the sealing part 49.47A.
49A to form the rear heat-sealed portion 62 of the tubular film 2B, and further push the cutter 46 against the urging force of the coil spring 51, so that the cutter 46 seals the sandwiched portion and the rear portion. Heat seal part 6
The cylindrical film 2B is cut between 2 and inserted into the insertion groove 59. Further, the contact plate 55 contacts the clamping portion 47A side without compressing the leaf spring 54. Cylinder 40. , il, the pair of left and right moving bodies 43, 44 and the cutter 46 return to their original positions due to the restoring force of the coil springs 5L and 60, and the contact plate 55 returns to its original position due to the restoring force of the leaf spring 54. The cylindrical film 2B instantly separates from the heat seal portion 49.

As the cylindrical film 2B is cut, the bag 2C that accommodates the package 19 made into a bag by two-sided sealing is further moved by the clamping member 67 due to the tensile load of the balance wade door 2.
The sliding body 65 and the second glue 1
- The actuator 14A of the switch 74 is engaged and the second limit switch 74 is turned on. Next, sandwiching part +A67
will be released. In this case, the bag 2C containing the package 19
Since the package 1 is pulled in the film traveling direction by the balance wade door 2, it is expected that the tensile force will vary.
9 is stopped by the stopper 82B, the bag 2C is guided at a predetermined position on the tray 82, and the front surplus portion 2D of the bag 2C protrudes from the opening 82A of the tray 82 with a predetermined dimension.

Next, when the film has stopped advancing, the motor 79
operates to drive the conhair 78, and the cylinder 91
A operates to fold back the upper excess portion of the bag 2C via the folding guide plate 91, and the tray 82 on which the bag 2C containing the package 19 is placed is transferred to a position corresponding to the front sealing device 77. Stop. In this state, cylinder 9
After the degassing member 93 is lowered by the operation of step 2 and the inside of the bag 2C is deaerated, the bag 2C is removed by the operation of the cylinders 86 and 87.
The front excess portion 2D is pinched and twisted by the clamping part 90, and then the heat 1 to seal member 84 are lowered by the operation of the cylinder 83 to form the front heat 1 to seal part 94, and the product is can get. This product is automatically discharged when the tray 82 turns downward as the container 78 is driven.

In the above embodiment, the control Q of the rear sealing/cutting device 38 by the first and second limit switches 7374 according to flowchart 1~ of FIG. 3 will be explained in detail.
As the bi-folded strip film 2A advances, the film 2A
The inner package 19 is accommodated, and a cylindrical film 2B is formed by the upper part 1 to the seal part 61. The front end of the cylindrical film 2B in which the package 19 is housed is the pedestal 37.
In the state of protruding forward, the mover 69 pushes the sliding body 65 having the clamping member 67 backward against the tensile load of the balance wade door 2 by the operation of the cylinder 68, and the clamping member 67 When the front end of the cylindrical film 2B has been reached, the front end of the film 2B is clamped by the clamping member 67, and then the fluid in the cylinder 68 is removed, so that the forward tensile load by the rebalance wade door 2 is transferred to the film 2B. Add to. Next, feed roller 13.30°31
When the cylindrical film 2B is pulled to a predetermined position on the tray 82 corresponding to the rear sealing/cutting device 38 by the rotation of
The first limit switch 73 is turned on by the engagement between the actuator 73A of the first limit switch 73 and the sliding member 65, and the first limit switch 73 is turned on within a preselected predetermined time S as shown in FIG. 3(A). Only when the second limit switch 74 is not turned on, the cylindrical film 2 in which the package 19 is housed
It is determined that the film B has been successfully transferred by the clamping member 67 onto the tray 82 corresponding to the rear sealing/cutting device 38, and the rear sealing/cutting device 38 is operated to seal the rear of the cylindrical film 2B and cut it with the cutter 46. It is configured to do this. Therefore, when the cylindrical film 2B containing the package 19 is caught on the tray 82 and transferred to the tray 82 in an incomplete state as shown in FIG. 14, the front end of the cylindrical film 2B is held between the A sliding body 65 having a mounting member 65 and an actuator 7 of a first limit switch 73
3A does not engage, the first glue switch 73
is never turned on. In addition, when the clamping member 65 comes off from the tubular film 2B, the weight of the clamping member 65 balance way door 2 causes the sliding member 65 to turn on the first limit switch 73 as shown in FIG. 3(B). After that, the second limit switch 74 turns on instantly.
A predetermined time S from detection by the first limit switch 73
Since the second limit switch 74 is turned on within the vehicle, the rear sill and disconnect device 38 is not operated. In this way, the first and second limit switches 73 and 74 determine whether or not the cylindrical film 2B containing the package 19 is normally transferred onto the tray 82 by the clamping member 67, and detect any abnormality. When detected, the rear sealing/cutting device 38 does not operate, so cutting of the package 19 inside the tubular film 2B, which is the product, can be avoided.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the type of package and the material of the film may be selected as appropriate, and the structure of the sealing device may be selected as appropriate. Furthermore, although the opening of the bag 2C is configured to be heat-sealed after being twisted, the front heat-sealed portion 90 may be formed by vertically heat-sealing the bag 2C without twisting, as shown in FIG. You can also do this. Further, the means for moving the sliding body may be replaced by a cylinder, and the mover may be moved by a chain, a rack, or a pinion mechanism passed to a sprocket, or the clamping member may be opened and closed by an electromagnetic solenoid. Good too. Furthermore, although a limit switch is shown as a detection means, the present invention is not limited to this and can be applied to various other devices such as an optical sensor and a phototube switch.

〔Effect of the invention〕

The present invention involves continuously drawing out a heat-sealable strip film forward, folding both ends of the strip film into two using a bifold device, pulling out and guiding both ends of the bifold strip film upward, and folding the film into two. A package is housed in a strip-shaped film, and the upper part of this bi-folded strip-shaped film is sealed to form the film into a cylindrical shape.The upper edge of the front end of the cylindrical film in the direction of travel is held between clamping members. The rear part of the cylindrical film is sealed and cut by the rear sealing/cutting device while the clamping member is pulled in the film advancing direction by the weight of the balance weight, and the cut bag is cut into a substantially U-shape by the bag clamping and feeding mechanism. In the packaging device, the cylindrical film is guided onto the tray by the clamping member along the traveling direction of the cylindrical film, and at a position where the cylindrical film is fed to a sealing/cutting location. A first detecting means for detecting the pinching member is provided, and a second detecting means for detecting the pinching member is provided ahead of the first detecting means in the film traveling direction, and the first detecting means detects the pinching member. By configuring the rear sealing/cutting device to operate only when there is no detection from the second detection means within a predetermined period of time, the cylindrical film can be placed on the tray in an appropriate state by the clamping member. It is possible to provide a packaging device that can determine whether the package is being guided and can prevent the package housed in the cylindrical film from being cut.

[Brief explanation of drawings]

Figures 1 to 13 show an embodiment of the present invention, with Figure 1 being a schematic explanatory diagram, Figures 2 (A) to (C) being schematic explanatory diagrams showing the bag making process, and Figure 3 (A ) and (B) are flowchart 1 diagrams, FIG. 4 is a sectional view of the entire group, and FIG. 5 is an overall plan view.
Fig. 6 is a perspective view showing the folding device and opening device, Fig. 7 is a perspective view showing the upper sealing device, Fig. 8 is a perspective view showing the rear sealing/cutting device, and Fig. 9 is a perspective view showing the rear sealing/cutting device. 10 is a perspective view showing the tension device, FIG. 11 is a perspective view showing the film folding degassing and twist sealing device, and FIGS. 12 (A) and (B) show the front heat sealing process. A schematic explanatory drawing, Fig. 13 is a front view showing the product when the front heat seal part is vertically sealed, Fig. 14 (A) is a partially cutaway perspective view, and Fig. 14 (B) is a cross-sectional view. be. 2A - Bifold strip film 2B - Cylindrical film 20 - Upper sealing device 38 - Rear sealing/cutting device Clamping member Balance weight First limit switch (first detection means) Second limit switch (second Detection means) Patent applicant: Hiki Seiki Co., Ltd.

Claims (1)

[Claims] (1) While continuously pulling out the heat-sealable strip film forward, both ends of the strip film are folded in half by a bifolding device, and both ends of the bifold strip film are pulled out and guided upward, and the two ends are folded into two. A package is housed in a strip-shaped film, and the upper part of this bi-folded strip-shaped film is sealed to form the film into a cylindrical shape.The upper edge of the front end of the cylindrical film in the direction of travel is held between clamping members. The rear part of the cylindrical film is sealed and cut by the rear sealing/cutting device while the clamping member is pulled in the film advancing direction by the weight of the balance weight, and the cut bag is cut into a substantially U-shape by the bag clamping and feeding mechanism. In the packaging device, the cylindrical film is guided onto the tray by the clamping member along the traveling direction of the cylindrical film, and at a position where the cylindrical film is fed to a sealing/cutting location. A first detecting means for detecting the pinching member is provided, and a second detecting means for detecting the pinching member is provided ahead of the first detecting means in the film traveling direction, and the first detecting means detects the pinching member. within a predetermined period of time from
A packaging device characterized in that said rear sealing/cutting device is configured to operate only when there is no detection from said detection means.