JPS609131Y2 - Bag opening device in automatic enoki mushroom packaging equipment - Google Patents

Description

[Detailed description of the invention] This invention is based on enoki mushrooms that perform a series of operations from supplying bags, opening the bags, filling the bags with enoki mushrooms, deaerating the inside of the bags, sealing the opening of the bags, and transporting the bags after packaging is completed. Regarding an automatic mushroom packaging device, in particular, a large number of flexible bags made of polyethylene, etc., which are stored and held in a stacked state in a container, are sucked and fed one by one from the container, and enoki mushrooms are placed in the bags that are taken out. This invention relates to an improved structure of an automatic bag opening device that opens to allow filling.

Conventionally, bags made of polyethylene or the like that are stored and held in a stacked state in a container are suctioned and supplied one by one by a bag lifting suction plate, and the side periphery of the supplied bag is placed with the opening side of the supplied bag in the horizontal direction. The bag is clamped and hung by a supporting fixed clamp plate, and both sides of the bag opening are held in contact with a pair of bag opening suction plates, and then the bags are moved in a direction that is relatively far away from the bag. In this case, each of the bag opening suction plates has a circular suction hole or the like formed on its opposing surface, and a pipe is routed to the outside in communication with the suction hole. The end of this pipe is connected to a vacuum pump, and suction is performed through each pipe by the operation of the vacuum pump from each suction hole formed in the suction plate for each bag opening, and the bag opening side of the bag is forced. It is designed to be opened in accordance with the operation of the above-mentioned suction plate.

By the way, when opening the bag opening by forcibly suctioning both sides of the bag opening of a bag that is in close contact with each other through the suction holes of each bag opening suction plate and moving the suction plate in a direction relatively away from both sides of the bag opening. When the suction hole of the bag opening suction plate is placed on the opening side of the bag, which is the side close to the end of the bag mouth, and suction is applied, the bag opening end gradually moves as the bag opening suction plate moves. The bag is opened, but as the opening moves, the position where the end of the bag's mouth is sucked tends to change, causing the phenomenon that the end of the bag's mouth comes off from each suction hole position, causing air to flow into the suction holes and reducing the suction force. arise,
As a result, the efficiency with which the bag is sucked by the suction hole decreases, which tends to cause problems such as the bag opening not being able to open properly.

Additionally, in order to avoid this problem, if the suction hole of the bag opening suction plate is located some distance away from the end of the bag mouth, which is the opening side of the bag, the opening side of the bag will come into close contact with the suction plate. If the opening of the bag is sucked by the suction hole, a gap will hardly be formed between the two sides of the bag opening, resulting in a problem that the bag opening will become closed.

This invention provides an automatic bag opening device for an automatic packaging device for enoki mushrooms that solves the above-mentioned problems. are formed with suction holes on their mutually opposing surfaces at a location somewhat apart from the position where the end of the bag mouth, which is the opening side of the bag, is located, and the end of the bag mouth is formed adjacent to the suction hole. A shallow long groove is formed along the bag opening on the side closer to the bag opening, and a thin communication groove is formed to connect the suction hole and the long groove, so that the pair of bag opening suction plates can be attached to the bag opening. When both sides are held in contact with each other and the bag opening is suctioned, the suction force acts on the entire wide effective area of the suction hole and the long groove, making it possible to easily open the bag opening that has been closed. Once the bag opening begins to open, the bag opening can be reliably and continuously sucked by at least the suction holes, so that the bag is opened in a stable state at all times.

This invention will be explained in detail below with reference to illustrated embodiments.

The drawing shows a system that automatically takes out a bag made of flexible material such as polyethylene, opens it, automatically fills the bag with enoki mushrooms, and then automatically seals the bag opening. This figure shows a bag opening device in an automatic enoki mushroom packaging device for transporting enoki mushrooms, and the main body 1 of the automatic enoki mushroom packaging device is equipped with a bag storage container 2. Formed bag 3
are stored horizontally in a stacked state.

An air cylinder 4 is installed below the bag storage container 2, and the piston 5 of the air cylinder 4 is connected to the container 2, so that the container 2 can be raised and lowered as the piston 5 of the air cylinder 4 is driven. is forming.

Further, above the container 2 in which the bag 3 is stored, a shaft support plate 6. is formed protrudingly, and a shaft 7 is mounted on this shaft support plate 6.
is attached, and a rotating piece 8 is passed through this shaft 7.

At the lower end of the rotating piece 8, a bag lifting adsorption plate 10 is installed at a position along one side edge of the bags 3, perpendicular to the opening side of the bags 3 stacked in the container 2 via a connecting plate 9. is formed, and a pipe 11 is routed to the outside in communication with a small hole 10A formed in the bag lifting adsorption plate 10, and this pipe 11 is connected to a vacuum pump (not shown).

Furthermore, a long hole 12 is formed at the other end of the rotating piece 8, and the end of the piston 14 of the air cylinder 13 installed in the main body 1 is engaged with the long hole 12 of the rotating piece 8. The rotary piece 8 is formed to be rotatable about the shaft 7 as the piston 14 is driven, and the bag lifting suction plate 10 is rotatably moved along with this rotary movement.

Therefore, by using the bag supply member configured as described above, the bag storage container 2 is first moved up by the piston 5 of the air cylinder 4, and a suction action from a vacuum pump (not shown) is applied to the small hole 10A formed in the bag lifting suction plate 10 by the pipe 11. , and the small hole 10A of the bag lifting suction plate 10 attracts a position along one side end of the bag 3 perpendicular to the opening side of the bag 3, thereby removing the topmost stacked bag 3. After the suction is completed, the piston 5 is moved downward to the initial position, and with this operation, the piston 14 engaged with the elongated hole 12 of the rotating piece 8 moves the piston 14 of the air cylinder 13 up. The rotating piece 8 is rotated about the shaft 7- formed on the main body 1 side, and the bag lifting suction plate 10 is rotated via the connecting plate 9, and the bag 3 suctioned to the suction plate 10 is next We are trying to supply it to the process.

Furthermore, a fixed clamping plate 15 having a length approximately equal to the length of the bag 3 is installed at one location on the main body corresponding to the rotational movement position of the bag lifting suction plate 10, that is, the position where the bag 3 is transferred to the next process. A movable clamping plate 16 that can move forward and backward toward and away from the clamping plate 15 is formed, and this movable clamping plate 1
An air cylinder 17 is installed on the back side of the air cylinder 6, and a piston 18 of this air cylinder 17 and the movable clamping plate 16 are connected to each other, so that the movable clamping plate 16 is connected to the fixed clamping plate 15.
The piston 18 of the air cylinder 17 is driven to move toward and away from the piston 18 so as to move forward and backward.

Moreover, the bag 3 is placed between the fixed clamping plate 15 and the movable clamping plate 16.
When the bag is lowered, a pair of bag opening suction plates 19 and 20 are disposed opposite to both sides of the bag opening of the closed bag 3,
The pistons 23 and 24 of each air cylinder 21 and 22 installed on the main body 1 side are connected to the respective bag opening suction plates 19.
．． 20, and the pair of air cylinders 21.
As the pistons 23 and 22 of the bag opening suction plates 19 and 20 are driven, the bag opening suction plates 19 and 20 are formed to move toward and away from each other so as to be able to advance and retreat.

The pair of bag-opening suction plates 19 and 20 have suction holes 25 on their opposing surfaces at a location somewhat apart from the position where the end of the bag mouth, which is the opening side of the bag 3, is arranged. 26
At the same time, a shallow long groove 2 is formed along the bag opening on the side close to the suction holes 25 and 26 and close to the end of the bag opening.
7, 28 are formed, and narrow communication holes 429, 30 are further formed to connect the suction holes 25.26 and the long grooves 27.28.

Also, a pipe 31.3 is connected to the suction hole 25.26.
2 is routed to the outside and this pipe 31.3
2 is connected to a vacuum pump (not shown).

In addition, each of the above air cylinders 4. 13. 17.2
1 and 22 are connected to a compressor (not shown) to drive the pistons 5, 14.1B, 23.degree. 24.

In addition, a cam is operated in conjunction with the drive of a motor built into the automatic enoki mushroom packaging device (not shown), and relays, etc. are switched in conjunction with the movement of this cam, and each air cylinder by a compressor (not shown) is operated by this switching operation. 4.13.17, 21.22 drives and bag lifting suction plate 1 by vacuum pump (not shown)
0. The suction operation of the suction plates 19 and 20 for opening the bag is automatically switched and operated, and set to an appropriate position to perform a series of operations.

The operation of the above configuration will be explained.

First, turn on the power switch (not shown) formed on the automatic enoki mushroom packaging device, drive the motor, and as the cam rotates, air cylinders 4, 13, 17, 21, 2
2 and each suction plate 10, 19, 20 are sequentially operated to switch, the bag 3 is first supplied by the bag supply members on the bag storage container 2 side and the bag lifting suction plate 10 side, and then the bag 3 is supplied to the fixed clamping plate. It is sucked and fed to the suction plate 10 up to the 15th position.

Next, the movable clamping plate 16 connected to the piston 18 of the air cylinder 17 is moved to the fixed clamping plate 15 position by the driving of the piston 18, so that one side end of the bag 3 is separated between the fixed clamping plate 15 and the movable clamping plate 16. At the same time, suction is stopped to the small hole 10A of the bag lifting suction plate 10, which is the bag supply member, and this suction plate 1
0 is rotated back and pulled down to the initial position.

Thus, the suction holes 25 and 26 of the bag opening suction plates 19 and 20 are provided in pairs on both sides of the bag 3 suspended between the fixed clamping plate 15 and the movable clamping plate 16. are operated by suction from a vacuum pump (not shown) via pipes 31.32, and as shown in FIGS. 2 to 6, each bag opening suction plate 19.20 is connected to an air cylinder 21.2
The pistons 23 and 24 of 2 are driven to a position where they come into contact with both sides of the opening side of the bag 3, and the suction holes 25 and 26 formed in each suction plate 19 and 20 are closed by both sides of the bag 3. As a result, the suction holes 25 and 26 are decompressed, thereby sucking the outer surface of the bag 3.

At this time, the shallow long grooves 27 and 28, which occupy a large area and are formed in each suction plate 19 and 20, are connected to the narrow communication grooves 29 and 28.
Because it communicates with the suction holes 25 and 26 through 30,
Following the reduced pressure in the suction hole 25.26, the communication groove 29.30
The suction holes 25, 26 and the long grooves 27, 28 also exert a suction force on the bag 3 in the same way as the suction holes 25, 26, and as shown in FIG. 5A, the suction holes 25, 26 and the long grooves 27, 28 The suction force acts on the wide area it occupies, and the opening force acts on the surface edge of the bag 3 and the bag opening, which is located somewhat away from the bag opening edge. )7 der 21.22 each piston 23.24
When the bag opening suction plates 19 and 20 begin to move backward with the return operation, the suction holes 25, 26 and the long grooves 27,
Due to the strong suction force with 28, it is possible to successfully open the bag mouth which has been closed and closed.

At this time, once the bag opening of the bag 3 begins to open, air enters into the bag 3 from the outside, the effect of the two sides of the bag 3 coming into close contact with each other is reduced, and the bag opening becomes easier to open.

Subsequently, when the bag opening suction plate 19.20 further moves backward, the bag opening of the bag 3 further opens as shown in FIG.
, 28 position.

In this case, a momentary gap is created between the bag mouth end of the bag 3 and the long grooves 27, 28, and outside air flows into the long grooves 27, 28 due to the suction force. The bag 3 located on the inner surface side of the long grooves 27 and 28 by the grooves 29 and 30 is attracted by the suction action acting on the communication grooves 29 and 30, and the bag mouth end of the bag 3 and the long groove 27,
The gap between the inner surface of the suction holes 25 and 28 is closed, and the reduced pressure inside the suction holes 25 and 26 is maintained as shown in FIG.
26, the suction plate 19.2 continues to suction the bag 3.
The bag 3 can be opened as the bag 3 moves backward.

In this case, once the bag opening of the bag 3 begins to open due to the above-mentioned initial operation, air enters the bag 3 from the outside, reducing the close contact between both sides of the bag 3 and opening the bag opening. Therefore, the bag 3 can be reliably opened by suction only at the suction points by the suction holes 25 and 26.

Further, as shown in FIG. 5B, as the bag 3 is opened, the bag opening end becomes the long grooves 27, 28 formed in the suction plate 19, 20.
If the bag is out of position, a momentary gap will appear between the end of the bag mouth and the long grooves 27.28, but the suction hole 25.26 and the long grooves 27, 2B
Since the bag 3 and the suction side are closed again by the narrow communication groove 29.30 connecting between the bag 3 and the suction side, the decrease in suction force due to the reduced pressure in the suction holes 25, 26 can be reduced, and the communication groove 29.30 By forming the suction holes 25 and 26 with narrow grooves, the amount flowing into the suction holes 25 and 26 can be reduced.
The decrease in suction power due to 5.26 was recovered instantly, and bag 3
The suction opening operation can be kept almost stable.

Therefore, when the bag 3 is suspended between the fixed clamping plate 15 and the movable clamping plate 16, the opening of the bag is tightly closed and closed. The bag opening can be easily opened by providing a suction effect over a wide area of both the suction holes 25 and 26 and the long grooves 27 and 28, and once the bag opening of the bag 3 begins to open, the Air enters from the outside, reducing the close contact between both sides of the bag 3 and making it easier to open the bag opening. Therefore, at least by providing suction through the suction holes 25 and 26, the bag 3 can be brought into a specified state. can be opened reliably.

Further, as shown in FIG. 6, a pair of bag opening suction plates 19.
By forming the suction holes 25 and 26 formed in the bag 20 so as to be deviated from their respective axial positions, the suction points on both sides of the bag 3 are displaced due to the suction operation from a vacuum pump (not shown). A gap is likely to be formed between the bag 3 and both side surfaces of the bag 3, making it easier for outside air to enter through the bag mouth which is tightly closed and closed, thereby further reducing the effect of the bag 3 having both side surfaces of the bag 3 in close contact with each other.

[Brief explanation of drawings]

The drawings show an embodiment of the bag opening device of the automatic enoki mushroom packaging device according to this invention, and FIG. 1 is a front view thereof, FIG. 2 is a front view showing the operation of FIG. 1, and FIG. The figure is a front view showing the main part of Fig. 2, Fig. 4A is a perspective view of the main part seen from the direction of arrow X in Fig. 3, and Fig. 4B is a perspective view of the main part seen from the direction of arrow Y of Fig. 3. FIGS. 5A, B, and C are sectional views showing the operation of the essential parts as seen from above in FIG. 3, and FIG. 6 is an enlarged sectional view of the essential parts in FIG. 3. Main body: 1, Bag storage container: 2, Bag = 3, Air cylinder: 4, 13, 17, 21, 22, Piston: 5, 14,
18, 23, 24, shaft support plate: 6, shaft = 7, rotating piece: 8,
Connecting plate = 9, bag lifting suction plate = 10, small hole: 10A,
Pipe: 11, 31.32, Long hole: 12, Fixed clamping plate:
15, Movable clamping plate: 16, Bag opening suction plate: 19, 20
, Suction hole: 25, 26, Long groove: 27, 28, Communication groove: 2
9.30°

Claims (2)

[Scope of utility model registration request] (1) A bag made of a flexible material such as polyethylene is fed by a bag supplying member and hung down, and a pair of bag opening suction plates are attached to each other so that they can move forward and backward, facing both sides of the bag opening. The suction plates are arranged so as to move away from each other, and suction holes are formed on the mutually opposing surfaces of each suction plate at locations somewhat apart from the position where the end of the bag mouth, which is the opening side of the bag, is disposed. At the same time, shallow long grooves are formed close to each of the suction holes on the side near the end of the bag mouth, and further, a thin communication groove is formed to connect each of the suction holes and each of the long grooves. A bag opening device for an automatic enoki mushroom packaging device characterized by: (2) A bag opening device for an automatic enoki mushroom packaging device according to claim 1, wherein the suction holes are formed so as to be slightly offset from their respective axis positions.