JPH09104421A - Method and device for shaping flat pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve shaping property by pressing a pressure plate to an outer bag when it is vibrating, compressing the outer bag to a predetermined thickness, thereafter, stopping vibration of a vibration plate, and restoring the atmospheric pressure in a vacuum chamber. SOLUTION: A pressure plate 17 is abutted against an upper side face of an outer bag 10 which is being vibrated by a vibration plate 14. Further, when the pressure plate 17 is lowered, the outer bag 10 is pushed by the vibrating vibration plate 14 and pressure plate 17, so that the vertical sectional shape of the outer bag 10 gradually becomes nearly rectangular. In the pressing process, the curving state of a bowl-like shape of the lower side face of the outer bag 10 changes to a flat state, so that flat pouches (b) can move evenly toward the peripheral part of the outer bag 10 due to the vibration of the vibration plate 14. Thereafter, the pressure plate 17 is lowered so as to shape the outer bag 10 filled with the flat pouches (b) into a flat shape having a nearly uniform thickness. At a point of time that the pressure plate 17 arrives at the lowest position and the shaping of the outer bag 10 is completed, the vibration of the vibration plate 14 is stopped and the atmospheric pressure is restored in a vacuum chamber 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a bag in which a large number of rectangular flat small bags (hereinafter, simply referred to as “flat small bags”) in which an oxygen scavenger or the like is enclosed are deaerated and packed (hereinafter referred to as “flat small bags”). ,
It is called "exterior bag". The method for shaping a flat pouch and the apparatus for shaping the flat pouch according to claim 1) into a substantially constant shape having a uniform thickness.

[0002]

2. Description of the Related Art An empty outer bag in a suspended state in which the vicinity of a bag mouth is grasped by a sandwiching member is filled with an object to be packaged, and then the outer bag deaerated by vacuum packaging means is placed in the outer bag. By expanding the outer bag by laterally accommodating it in a vacuum chamber with a higher degree of vacuum than the above, and by vibrating the outer bag and pressing the outer bag, the packaged object is diffused. There is known a shaping method and an apparatus for shaping an outer bag, in which an object to be packaged is degassed and packaged, into a substantially constant shape having a uniform thickness (for example, JP-A-4-6020). , JP-A-6-298219, JP-A-1-116107, etc.).

[0003]

As shown in FIG. 7 (a), which is a schematic front view for explaining the problems of the conventional shaping device, the vicinity of the bag mouth 2a is gripped by the sandwiching member 1. When the packaged object 3 is degassedly packaged in the suspended exterior bag 2, the packaged object 3 is unevenly packed below the exterior bag 2. A vacuum chamber 4 having a higher degree of vacuum than the degree of vacuum in the outer bag 2 is formed in the outer bag 2 in which the items to be packaged 3 are unevenly filled under the outer bag 2.
When the outer bag 2 is inflated by being accommodated sideways in the inside of FIG.
As shown in (b), the object to be packaged 3 is the outer bag 2
A heaped state is formed in a biased position on the lower side of. In such a state, even if the outer bag 2 is pressed by the pressing plate 5 and the vibrating plate 6 vibrates the packaged object 3, the packaged object 3 does not diffuse in the bag mouth 2a direction, or However, there is a problem that it takes time to diffuse in the direction of the bag mouth 2a and the efficiency of the shaping operation is deteriorated.

When the object to be packaged 3 has high fluidity such as rice, as shown in FIG. 7 (b), the packaging bag 2 is simply laid sideways to form a heaped object. Package 3
Although it collapses and becomes substantially flat, in the case where the packaged object 3 is a flat pouch, the packaged object 3 does not collapse and become substantially flat even when the outer bag 2 is placed sideways. .

An object of the present invention is to solve the problems of the above-described conventional shaping method and apparatus thereof, and to obtain an outer bag filled with a flat pouch having an improved shaping property. A method and an apparatus therefor are provided.

[0006]

In order to achieve the above-mentioned object, the present invention provides a method for shaping a flat pouch, wherein an outer pouch filled with the flat pouch is degassed and packaged in the outer pouch. After being accommodated in a vacuum chamber having a vacuum degree higher than the vacuum degree and inflated, the outer bag is vibrated by a vibrating plate, and then disposed in the vacuum chamber and separated from the inflated outer bag. By lowering the pressing plate at the standby position, the pressing plate is pressed against the vibrating outer bag, and between the pressing plate and the vibrating plate, the outer bag is compressed to a predetermined thickness, After that, the vibration of the vibrating plate is stopped, and the inside of the vacuum chamber is returned to the atmospheric pressure. Further, in the flat pouch shaping device, firstly, the pressure inside the vacuum chamber is reduced. Plate and flat small A diaphragm disposed below a belt conveyor on which an outer bag that is filled and degassed is placed, an upper standby position that is separated from the expanded outer bag that is housed in the vacuum chamber, and A cylinder for moving the pressing plate up and down between the lowermost position for shaping the outer bag, a stroke adjusting member arranged on a piston rod extending upward through the cylinder, and arranged on the upper part of the cylinder. Secondly, a vacuum chamber in which a pressing plate that can be moved up and down by a cylinder is installed, and an outer bag that is filled with a flat small bag and degassed is placed. A diaphragm disposed below the belt conveyor, a vacuum chamber opening / closing detector, and a vacuum pump is operated based on a signal from the vacuum chamber opening / closing detector. Stage, a vacuum detector for detecting the degree of vacuum in the vacuum chamber, and the operation of the vacuum pump when the vacuum detector detects that the degree of vacuum in the vacuum chamber has reached a predetermined degree of vacuum. Stopping means, a timer that is operated based on a signal from the vacuum detector, a means that operates the diaphragm by the operation of the timer, and the cylinder is operated after the vibration of the diaphragm is started. A timer for lowering the pressing plate at a standby position above the expanded outer bag is provided.

1 to 5 which are front views of the flat pouch shaping apparatus of the present invention including a partial vertical section, and FIG. 6 which is a control block diagram of the flat pouch shaping apparatus of the present invention. Examples of the present invention will be described using the examples, but the present invention is not limited to these examples as long as the gist of the present invention is not exceeded.

[0008]

EXAMPLE 10 is an outer bag, and the outer bag 10 includes:
In the vacuum packaging step of the previous step, a large number of flat pouches b in which the oxygen scavenger or the like is enclosed are filled in the empty empty outer bag 10 in a suspended state, and then deaerated and packaged. Flat pouch b
The outer bag 10 filled with and degassed is laterally placed on the belt conveyor 11 that intermittently moves, and is conveyed to the shaping device.

Reference numeral 12 denotes a support frame arranged on the lower surface of the belt conveyor 11, and the support frame 12 supports the belt conveyor 11 and is placed on the upper surface of the belt conveyor 11 and has a box opened downward. The bottom edge of the mold vacuum chamber 13 is supported. Reference numeral 14 denotes a vibration plate disposed between the support frames 12 below the belt conveyor 11 and vibrating in the vertical direction. The vibration plate 14 is, for example, the vibration plate 14
The eccentric cam 15 abutting on the roller 14a is rotatably driven by a motor (not shown) via the vertical rod 14b attached to the lower end of which the roller 14a is provided. Has been done.
By vibrating the vibrating plate 14, the outer bag 10 filled with the flat small bag placed on the stopped belt conveyor 11 and deaerated and packaged vibrates in the vertical direction together with the belt conveyor 11.

Reference numeral 16 denotes a vertical cylinder arranged on the upper wall surface of the vacuum chamber 13, and a piston rod 16a of the vertical cylinder 16 penetrates the upper wall of the vacuum chamber 13 and extends into the vacuum chamber 13. A pressing plate 17 is attached to the lower end of the piston rod 16a so as to face the diaphragm 14 described above.

The piston rod 16a penetrates the vertical cylinder 16 and extends upward, and a screw groove is formed near the upper end of the piston rod 16a over a predetermined length. A stroke adjusting member 18 is screwed into a thread groove formed near the upper end of the piston rod 16a, and a fixing nut 19 is screwed into the upper portion of the stroke adjusting member 18. When moving the stroke adjusting member 18 in the vertical direction, first, the fixing nut 19 is rotated to move the fixing nut 19.
Away from the upper surface of the stroke adjusting member 18, and then
The stroke adjusting member 18 is rotated to move the stroke adjusting member 18 to a predetermined position. After that, the fixing nut 19 is rotated to bring the fixing nut 19 into contact with the upper surface of the stroke adjusting member 18, and the stroke adjusting member 18 is fixed so as not to inadvertently move. 2
Reference numeral 0 is a cylindrical stroke adjusting collar disposed on the upper portion of the vertical cylinder 16.

By supplying air from the upper air supply pipe 16b of the vertical cylinder 16, the piston rod 16a is screwed to the stroke adjusting collar 20 provided on the upper surface of the vertical cylinder 16 to the piston rod 16a. The stroke adjusting member 18 moves downward until it abuts, and the lower air supply pipe 1 of the vertical cylinder 16
By supplying air from 6c, the piston rod 1
6a moves upward, and accordingly, the pressing plate 17 attached to the lower end of the piston rod 16a is configured to move up and down with a predetermined stroke.

The stroke of the piston rod 16a, that is, the stroke of the pressing plate 17 can be performed by replacing the stroke adjusting collar 20 provided on the upper surface of the vertical cylinder 16. That is, by using the stroke adjusting collar 20 having a low height, the pressing plate 17 can be moved to a lower position, and conversely, by using the stroke adjusting collar 20 having a high height, The pressing plate 17 can be stopped at a higher lower position. The fine adjustment of the stroke of the piston rod 16a is performed by rotating the stroke adjusting member 18 and moving it up and down along the piston rod 16a as described above. 21 is a vacuum chamber 1
3 is a pipe that connects the short cylinder 22 penetrating the upper wall of the No. 3 and the vacuum pump.

Next, the order of shaping the flat pouch will be described with reference to FIGS.

In the vacuum packaging process of the previous step, a large number of flat pouches b are filled in the empty outer pouch 10 in a suspended state, then deaerated and packed, and the flat pouch b is filled. 10 are manufactured. The outer bag 10 filled with the flat small bag b and degassed and packed is horizontally placed on the belt conveyor 11 and conveyed to the shaping device having the above-described structure.

As shown in FIG. 1, when the outer bag 10 filled with the flat small bag b and degassed is positioned above the vibrating plate 14, the belt conveyor 11 is stopped. Then, the vacuum chamber 1 at the upper standby position
3 is lowered by a known means, and the lower end edge of the vacuum chamber 13 is supported by the support frame 1 via the belt conveyor 11.
2

Next, the vacuum pump is operated to operate the pipe 2
The vacuum deaeration in the vacuum chamber 13 is started via 1. When the degree of vacuum in the vacuum chamber 13 becomes higher than the degree of vacuum in the outer bag 10 by a predetermined value, the operation of the vacuum pump is stopped. When the degree of vacuum in the vacuum chamber 13 is made higher than the degree of vacuum in the outer bag 10, the outer bag 10 is inflated by the relative pressure difference, as shown in FIG. A space is formed above. When the outer bag 10 is inflated, the pressing plate 17 is located at the upper standby position apart from the outer bag 10 so that the pressing plate 17 does not come into contact with the outer bag 10.

Then, a motor (not shown) is driven to rotate the eccentric cam 15 to vibrate the diaphragm 14 in the vertical direction via the vertical rod 14b, as shown in FIG. In addition, a flat small bag b which is in a heaped state at a biased position on the right side of the outer bag 10,
By moving along the lower side surface 10a of the outer bag 10 which is curved like a bowl, as shown in FIG. 3, the peaks of the flat pouches b are flattened.

Next, by supplying air from the upper air supply pipe 16b of the vertical cylinder 16, the piston rod 16a is lowered, and the pressing plate 17 is vibrated by the vibrating plate 14 as shown in FIG. The outer bag 10 is brought into contact with the upper side surface 10b. Furthermore, the pressing plate 1
When the outer bag 10 is lowered, the outer bag 10 is pushed by the vibrating diaphragm 14 and the pressing plate 17, and the vertical cross-sectional shape of the outer bag 10 gradually becomes a horizontally long rectangular shape. In this pressing process, the lower side surface 10a of the outer bag 10 shifts from the bowl-shaped curved state shown in FIGS. 3 and 4 to a flat state, so that the flat pouch b is vibrated by the diaphragm 14. Thereby, it is possible to move evenly toward the peripheral portion of the outer bag 10. Then, the pressing plate 17 is further lowered to shape the outer bag 10 filled with the flat small bag b into a flat shape having a substantially uniform thickness as shown in FIG.

When the pressing plate 17 reaches the lowest position and the shaping of the outer bag 10 is completed, the vibration of the diaphragm 14 is stopped and the inside of the vacuum chamber 13 is returned to the atmospheric pressure. Furthermore, by supplying air from the lower air supply pipe 16c of the vertical cylinder 16, the piston rod 16a is moved upward, and the pressing plate 17 attached to the lower end of the piston rod 16a is moved to the upper standby position. return.
In this way, a series of shaping operations is completed.

The lowermost position of the pressing plate 17 is set so that the pressing plate 17 does not descend beyond the thickness of the outer bag 10 which is shaped and filled with the flat small bag b almost completely. The lowermost position of the pressing plate 17 is performed by replacing the stroke adjusting collar 20 arranged on the upper portion of the vertical cylinder 16 as described above.
Fine adjustment of the lowermost position of 7 is performed by rotating the stroke adjusting member 18 and moving it up and down along the piston rod 16a.

As described above, when the vibration of the vibrating plate 14 is started, the outer bag 10 expanded by the pressing plate 17 is used.
Is not pressed, the lower side surface 10a of the outer bag 10
Is curved in a bowl shape. Therefore, the flat small bag b, which is in a heaped state at a biased position on the right side of the outer bag 10 due to the vibration of the diaphragm 14, is an outer bag curved in a bowl shape. 10
It is possible to move quickly to the central portion of the outer bag 10 along the lower side surface 10a of the above, and level the peaks of the flat pouches b substantially flat. After that, the pressing plate 17 is lowered to move the lower side surface 10a of the outer bag 10 from the bowl-shaped curved state to the flat state, so that the flat pouch b vibrates due to the vibration of the vibrating plate 14. Since it can move evenly toward the peripheral portion of the outer bag 10, the flat small bag b
The outer bag 10 filled with can be shaped into a flat shape having a substantially uniform thickness, and the shaping work time can be shortened. If the lower side surface 10a of the expanded outer bag 10 is curved like a bowl, the diaphragm 14
The expanded outer bag 10 may be pressed by the pressing plate 17 at the start of the vibration.

As described above, unlike flat rice pouches having poor fluidity such as rice, the flat pouches b having poor fluidity may collapse when the outer bag 10 is inflated. However, the outer bag 10 is still in a heaped state at a biased position on the right side. In this state, when the pressing plate 17 presses the outer bag 10 and the vibration plate 14 starts to vibrate, the flat small bag b, which is in a heaped state at a biased position on the right side of the outer bag 10, turns into an outer bag. It takes time to move the bag 10 toward the bag mouth, that is, to the left in FIG. 2, and the flat pouch b cannot be sufficiently diffused. Therefore, the outer bag 10 has a substantially uniform thickness. It cannot be shaped into a flat shape.

Next, the control means of the flat pouch shaping apparatus of the present invention will be described with reference to FIG.

Reference numeral c1 is a vacuum chamber opening / closing detector for detecting that the vacuum chamber 13 is placed on the support frame 12 via the belt conveyor 11, and the vacuum chamber 13 is placed on the support frame 12. The signal emitted in the case of being input is input to the central control unit C. Reference numeral c2 denotes a vacuum detector arranged at a predetermined position of the pipe 21 for detecting that the vacuum degree in the vacuum chamber 13 has reached a predetermined vacuum degree, and the vacuum degree in the vacuum chamber 13 is a predetermined vacuum degree. The signal emitted from the vacuum detector c2 at the same time is also input to the central controller C.

C3 is a motor for rotating the eccentric cam 15 for vibrating the diaphragm 14, and the motor c3
A timer c4 whose operating time is adjustable is connected to the timer c4.
Is operated to drive the motor c3 for a predetermined time. c5 is a vacuum pump for vacuum degassing the inside of the vacuum chamber 13, and the vacuum pump c5
Is connected to the central control unit C via a changeover switch c6 that switches the vacuum pump c5 between an operating state and an atmosphere open state.

C7 is an air supply source, and the air supply source c
7 is an upper air supply pipe 16b of the vertical cylinder 16
Alternatively, the lower air supply pipe 16c is selectively connected to the vertical cylinder 16 via a changeover switch c8 for supplying air. c9 is a timer with an adjustable operating time for supplying air to the upper air supply pipe 16b and lowering the pressing plate 17 at the upper standby position for a predetermined time. It is configured to operate according to the command of.

Next, the operation of the control means having the above construction will be described.

As shown in FIG. 1, when the outer bag 10 filled with the flat small bag b and degassed is positioned above the vibrating plate 14, the belt conveyor 11 is stopped, and then, Vacuum chamber 13 in the upper standby position
Is lowered by a known means, and the belt conveyor 1
It is placed on the support frame 12 via When the vacuum chamber open / close detector c1 detects the placement of the vacuum chamber 13 on the support frame 12, a signal is issued from the vacuum chamber open / close detector c1 to the central controller C. Based on the signal, the vacuum pump c5 is operated via the changeover switch c6 by a command from the central control unit C, and the vacuum deaeration in the vacuum chamber 13 is started.

When the vacuum detector c2 detects that the inside of the vacuum chamber 13 has reached a predetermined degree of vacuum, a signal from the vacuum detector c2 is input to the central controller C.
Based on the signal, the operation of the vacuum pump c5 is stopped to maintain the inside of the vacuum chamber 13 at a predetermined degree of vacuum. Further, based on the signal, the timer c4 is operated to drive the motor c3, and the diaphragm 14 is operated for a predetermined time.
Vibrate vertically. Further, based on the above signal, a timer c9 is operated by a command from the central control unit C, and the vertical cylinder 1 is operated via the changeover switch c8.
The air from the air supply source c7 is supplied to the upper air supply pipe 16b of No. 6, and the pressing plate 17 at the upper standby position is lowered. In addition, after the vibration plate 14 starts to vibrate, the pressing plate 17 is configured to come into contact with the upper side surface 10b of the expanded outer bag 10.

The above-described timer c9 operates for a predetermined time to lower the pressing plate 17, and the pressing plate 17 and the vibrating plate 14 vibrate the outer bag 10 filled with the flat pouch b. After shaping into a flat shape with a substantially uniform thickness,
The timer c9 expires. The operating time of the timer c4 that appropriately drives the motor c3 so that the diaphragm 14 vibrates until the pressing plate 17 descends to the lowest position and the outer bag 10 is shaped into a flat shape having a substantially uniform thickness. Adjust. Therefore, at the same time when the pressing plate 17 descends to the lowest position,
Alternatively, immediately after that, the timer c4 is turned off, the driving of the motor c3 is stopped, and the vibration of the diaphragm 14 is stopped. When the central controller C detects that the timer c9 has expired, the changeover switch c6 is switched by a command from the central controller C, the vacuum pump c5 is opened to the atmosphere, and the vacuum chamber 1
The inside of 3 is returned to atmospheric pressure.

When the timer c9 expires, the changeover switch c8 is switched to supply air from the air supply source c7 to the lower air supply pipe 16c of the vertical cylinder 16, and the pressing plate 17 is moved to the upper standby position. Return to. In this way, one cycle of shaping operation is completed.

In the above embodiment, the changeover switch c6 is changed over by the command from the central control unit C which detects that the timer c9 has expired, the vacuum pump c5 is opened to the atmosphere, and the vacuum chamber is opened. Thirteen
An example is shown in which the inside is returned to atmospheric pressure,
In response to a command from the central control unit C that detects that the timer c4 connected to the motor c3 has expired, the changeover switch c6 is changed over, the vacuum pump c5 is opened to the atmosphere, and the inside of the vacuum chamber 13 is in the atmospheric pressure state. It can also be returned to.

[0034]

Since the present invention is constructed as described above, the following effects can be obtained.

Since the expanded outer bag was vibrated by the diaphragm prior to the lowering of the pressing plate at the standby position above the expanded outer bag, the bottom side of the outer bag was vibrated with the vibration of the diaphragm. It is possible to quickly move the flat pouches that are piled up in a biased position to the center of the outer pouch along the lower side surface of the outer pouch that is curved like a bowl, and Since it is flattened evenly, the flat pouch can be moved evenly toward the peripheral portion of the outer bag due to the vibration of the vibration plate in combination with the operation of the pressing plate thereafter. The filled outer bag can be shaped into a flat shape with a substantially uniform thickness, and the shaping work time can be shortened.

Since the stroke adjusting member is arranged on the piston rod extending upward through the cylinder and the stroke adjusting collar is arranged on the upper portion of the cylinder, the stroke of the pressing plate can be easily and quickly adjusted. It can be adjusted.

Since the control members such as the vacuum chamber opening / closing detector and the means for operating the vacuum pump based on the signal from the vacuum chamber opening / closing detector are arranged, one cycle of the shaping operation is effectively and efficiently performed. Therefore, the work efficiency of the flat pouch shaping device can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a flat pouch shaping apparatus of the present invention including a partial vertical cross section.

FIG. 2 is a front view of the flat pouch shaping apparatus of the present invention including a partial vertical cross-section similar to FIG.

FIG. 3 is a front view of the flat pouch shaping apparatus of the present invention including the same partial vertical cross section as FIG.

FIG. 4 is a front view of the flat pouch shaping apparatus of the present invention including a partial vertical cross-section similar to FIG.

FIG. 5 is a front view of the flat pouch shaping apparatus of the present invention including the same partial vertical cross section as FIG. 1.

FIG. 6 is a control block diagram of the flat pouch shaping apparatus of the present invention.

FIG. 7 is a schematic front view of a shaping device for explaining the problems of the conventional shaping device.

[Explanation of symbols]

 C: Central control device b: Flat small bag 10: Exterior bag 11: Belt conveyor 13: Vacuum chamber 14 ··· Vibration plate 16 ··· Cylinder 17 ··· Pressing plate 18 ··· Stroke adjusting member 20 ··· Stroke adjusting collar

Claims (3)

[Claims] 1. An outer bag, which is filled with flat small bags and is deaerated and packaged, is housed in a vacuum chamber having a vacuum degree higher than the vacuum degree in the outer bag and inflated, and then the outer bag is vibrated. The plate is vibrated, and then the pressing plate placed in the vacuum chamber and located at the standby position above the expanded outer bag is lowered to press the pressing plate against the vibrating outer bag. Then, the outer bag is compressed to a predetermined thickness between the pressing plate and the vibration plate, and then the vibration of the vibration plate is stopped and the inside of the vacuum chamber is returned to the atmospheric pressure. A method of shaping flat pouches featuring. 2. A pressing plate mounted inside a vacuum chamber,
A diaphragm placed below a belt conveyor on which an outer bag that is filled with flat small bags and degassed and packed is placed, and an upper standby that is separated from the expanded outer bag that is housed in the vacuum chamber. A cylinder for moving the pressing plate up and down between a position and the lowest position for shaping the outer bag,
A flat pouch shaping device comprising a stroke adjusting member arranged on a piston rod extending upward through the cylinder, and a stroke adjusting collar arranged on an upper portion of the cylinder. 3. A vibrating plate disposed below a belt chamber on which a vacuum chamber in which a pressing plate that can be moved up and down by a cylinder is installed and an outer bag in which flat small bags are filled and degassed are placed. And a vacuum chamber open / close detector,
A means for operating a vacuum pump based on a signal from the vacuum chamber opening / closing detector, a vacuum detector for detecting the degree of vacuum in the vacuum chamber, and a degree of vacuum in the vacuum chamber have reached a predetermined degree of vacuum. When the vacuum detector detects that, a means for stopping the operation of the vacuum pump, a timer which is operated based on a signal from the vacuum detector, and the diaphragm which is operated by the operation of the timer. Shaping of the flat pouch characterized by having means and a timer for activating the cylinder to lower the pressing plate at a standby position above the expanded outer bag after starting the vibration of the vibrating plate. apparatus.