JP3514886B2 - Vacuum packaging machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a vacuum chamber provided around a table which is intermittently rotated while repeatedly starting and stopping, at a predetermined interval, and a bag filled with a filling material in the vacuum chamber of the vacuum chamber. The present invention relates to a vacuum packaging machine that accommodates and vacuum packages the same.

[0002]

2. Description of the Related Art Referring to FIG. 3, a conventional vacuum packaging machine (see FIG.
(Excluding the pressure welding device from the device of 1.), this vacuum packaging machine A is arranged adjacent to the filling machine B,
This is a device for receiving a bag filled with a filling from the filling machine B and vacuum-packing the bag. The filling machine B is a filling table T1 that intermittently rotates in the direction of the arrow while repeatedly moving and stopping.
The filling table T1 is provided with chucks 16 for holding the bag 15 at eight positions, and each stop position (number 1 on the table is indicated.
˜8 indicates a stop position), a known device for executing each step for filling is arranged. The vacuum packaging machine A includes a vacuum table T2 that intermittently rotates in the direction of the arrow while repeatedly moving and stopping, and the vacuum table T2 has a chuck that holds the bag 15 and a sealing device that seals the bag mouth of the bag 15 inside. It has vertical vacuum chambers 17 at 12 locations,
At each stop position (the numbers 1 to 12 on the table indicate the stop position), each process for vacuum packaging is executed.

In the filling process, first, the bag 15 is supplied to the filling table T1 by a supply device (not shown) and gripped by the chuck 16 (stop position 1), and the stamper 18 stamps the manufacturing date on the surface of the bag 15. (Stop position 2),
The bag mouth is opened by the vacuum suction cup 19 (stop position 3), the solid filling is filled through the hopper 20 (stop position 4), the liquid filling is filled from the nozzle 21 (stop position 5), and the sealing device 22 is provided. Thus, both sides of the bag mouth of the bag 15 are heat-sealed (stop position 6), and finally the upper part of the bag 15 is clamped by the delivery device 23 and transferred to the vacuum table T2 side (stop position 7). The stop position 8 is the idle process.

In the vacuum packaging process, the bag 15 delivered by the delivery device 23 is gripped by the chuck in the vacuum chamber 17 (stop position 1), and the lid of the vacuum chamber 17 is closed (~ stop position 2 ~ stop position). 3) Then, the bag 1 is evacuated to a predetermined pressure in sequence (stop positions 4 to 6) and sealed by the sealing device.
The entire bag mouth of No. 5 is heat-sealed (stop position 7) and subsequently cooled (stop positions 8 to 9), the inside of the vacuum chamber 17 is returned to atmospheric pressure, and at the same time the lid is opened (to stop position 10).
˜), the finally sealed bag 15 is released from the chuck and discharged to the next process by the conveyor 24 (stop position 11). The stop position 12 is an idle process.

The vacuum chamber 17 provided in the vacuum packaging machine A is basically the same as that described in Japanese Utility Model Laid-Open No. 6-81906, as shown in FIG. The chamber body 25 is provided with openings around it at predetermined intervals in the radial direction, and the chamber body 2 is opened and closed with respect to the openings of the chamber body 25 and closed.
5 and a chamber lid 26 that engages at the peripheral edge of the opening to form a vacuum chamber, and the chamber lid 26 is opened and closed by an opening / closing mechanism 27.

Inside the vacuum chamber 17, there are provided a chuck 28 for gripping both sides of the bag 15 and a sealing device composed of a heater device 30 and a seal base 31 which are moved forward and backward by an air cylinder 29. A shaping plate 32 for shaping is installed while being supported by a spring. A vacuum hose 33 connected to a vacuum source (not shown) is connected to the chamber body 25, and a packing 34 is provided at an engaging portion (a peripheral edge portion of the opening of the chamber body 25) between the chamber body 25 and the chamber lid 26. It is inserted all around.
A lever 35 is fixed to the upper end of the chamber lid 26, and a shaft 36 attached to the tip of the lever 35 is attached to the chamber main body 2
5 is rotatably supported by a bearing member 37 that is fixed to the upper end of 5.

The opening / closing mechanism 27 includes a vertical drive rod 38 that is vertically movable on the vacuum table T2, a cam roller 39 attached to the drive rod 38, and an open / close cam 40 that rolls when the cam roller 39 contacts. Shaft 4 in the middle part to bearing 37
1 is pivotally supported, the distal end is connected to the chamber lid 26 via a link 42, and the proximal end is a drive rod 38 via a link 43.
The opening / closing lever 44 is connected to the tip of the. When the cam roller 39 is not in contact with the downward cam surface 40a of the opening / closing cam 40, the chamber lid 26 is closed by its own weight and the drive rod 38 is lifted as shown by the solid line in FIG. .

With the rotation of the vacuum table T2,
When the vacuum chamber 17 and the drive rod 38 rotate and the cam roller 39 makes contact with and rolls on the cam surface 40a of the opening / closing cam 40, as shown by the phantom line in FIG. 8, the position of the drive rod 38 moves from the point (S1). While moving to the point (S2), the drive rod 38 is pushed down, the opening / closing lever 44 rotates around the shaft 41, and the chamber lid 26 rotates around the shaft 36 to open (see the phantom line in FIG. 7). ). Subsequently, while the drive rod 38 moves to the point (S3), the drive rod 38 does not move up and down, and the chamber lid 2
6 is kept open, and the drive rod 38 is raised and the chamber lid 26 is closed while moving from point (S3) to point (S4).

[0009]

By the way, the conventional vacuum packaging machine, particularly the vacuum chamber, has the following problems. At the evacuation start position (stop position 4 in the above example), the chamber lid of the vacuum chamber is closed by its own weight, and vacuum pressure is applied to the chamber lid to maintain the hermeticity through the packing. Since the shaft serving as the opening and closing fulcrum of the chamber is located substantially above the chamber lid, the pressure contact force against the chamber body (pressure contact force against the packing) due to its own weight is weak. If the processing accuracy and the assembly accuracy are poor, the packing inserted in the peripheral portion of the chamber body and the peripheral edge portion of the chamber lid often do not hit uniformly. Due to the above reasons, vacuum leakage is likely to occur at the start of evacuation, and therefore, particularly when the vacuum pressure acting is low, the time required to reach the predetermined vacuum pressure becomes long. The bulky packaging bag is shaped by sandwiching the bag between the shaping plate and the chamber lid in the vacuum chamber, but this shaping may not be possible due to the weak pressure contact force.

The present invention has been made in view of the above-mentioned problems of the conventional vacuum packaging machine, and it is possible to shorten the time required to reach a predetermined vacuum pressure while ensuring the sealing property of the vacuum chamber at the time of starting vacuuming. Another object of the present invention is to obtain a vacuum packaging machine capable of shaping a bulky packaging bag without trouble.

[0011]

A vacuum packaging machine according to the present invention comprises a chamber main body having an opening directed outward at a predetermined interval around a table which is intermittently rotated while repeatedly starting and stopping. Equipped with a chamber lid that is rotatably supported at the top and that opens and closes with respect to the opening of each chamber body, and that when closed, engages with the chamber body via a packing to form a vacuum chamber, and an opening and closing mechanism that opens and closes each chamber lid. A vacuum packaging machine for accommodating a bag filled with a filling material in the vacuum chamber for vacuum packaging, comprising a pressure welding device for pressing a chamber lid at a vacuuming start position of the table and pressing the chamber lid against the chamber body. Is provided.

In the above vacuum packaging machine, an example of the pressure contact device is composed of a backing plate provided on the surface of the chamber lid, and a roller movably installed outside the chamber lid at the vacuuming start position. , The roller abuts against the contact plate and presses it toward the inside. The roller may be, for example, a member that expands and contracts by an expanding and contracting operation unit such as an air cylinder to press the contact plate, and is supported by a spring or the like so as to be expandable and contractible, and when the contact plate comes into contact, the biasing force of the spring or the like is applied. The pressing plate may be pressed with.

Further, as another example of the pressure contact device, a roller provided on the surface of the chamber lid and a pressure contact plate movably installed at an outer position of the chamber lid at the evacuation start position, An example is one in which a pressure contact plate contacts the roller and presses it toward the inside. In addition,
The pressure contact plate may be, for example, a member that expands and contracts by an expansion and contraction operation unit such as an air cylinder to press the roller, is supported by a spring and the like so that the roller can be expanded and contracted, and when the roller abuts, the roller is biased by a spring or the like. It may be pressed.

In the above vacuum packaging machine, the opening / closing mechanism is, for example, a vertical drive rod vertically movably installed on a table, a cam roller attached to each drive rod, and an opening / closing mechanism in which the cam roller makes contact and rolls. It consists of a cam and an opening / closing lever whose middle portion is pivotally supported and whose leading end is connected to the chamber lid and whose base end is connected to the driving rod, and which displaces each driving rod while the cam roller rolls along the opening / closing cam. The chamber lid is opened and closed. At this time, when the cam roller is not in contact with and rolling on the cam surface of the opening / closing cam, the chamber lid is closed by its own weight.

When the opening / closing mechanism has the above-mentioned specific structure, the pressure contact device is composed of, for example, a second cam roller attached to the drive rod and a pressure contact cam on which the second cam roller rolls. Even if the second cam roller rolls along the pressure contact cam to displace the drive rod and press the chamber lid through the opening / closing lever to press the chamber body at the vacuum drawing start position. Good. In this case, the cam roller rolling the open / close cam may also serve as the second cam roller.

The pressure contact cam may be replaced with a pressure contact plate movably supported, and in this case, the pressure contact plate contacts the second cam roller to displace the drive rod and start the vacuuming. At the position, the chamber lid is pressed through the opening / closing lever to be pressed against the chamber body. The press-contact plate may be, for example, a member that is supported so as to be capable of expanding and contracting by means of an expanding and contracting operation means such as an air cylinder, or a member that is supported so that it can be expanded and contracted by a spring or the like. Also in this case, the cam roller rolling the open / close cam may also serve as the second cam roller.

In the vacuum packaging machine of the present invention, the pressure contact device presses the chamber lid of the vacuum chamber at the vacuum evacuation start position and presses the chamber lid toward the chamber main body, so that the chamber main body is started at the start of vacuum evacuation. , Packing,
The hermeticity between the chamber lid and the chamber lid is maintained, and the time required to reach a predetermined vacuum pressure is shortened.

[0018]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 1 to 3 show a first embodiment of the present invention. The vacuum packaging machine A shown here has the same structure (give the same numbers to the same parts) and the same function as the conventional vacuum packaging machine described above, except that the pressure welding device 50 is newly provided. Therefore, detailed description is omitted here except for the matters relating to the pressure welding device 50.

The press contact device 50 is attached to the surface of the chamber lid 26 and has a backing plate 51 whose outer periphery is formed in an arc shape along the rotation locus, and an outer position of the chamber lid 26 at the stop position 4 (vacuum evacuation start position). And a roller 53 that is installed by a cylinder 52 so as to extend and contract. Then, when the vacuum chamber 17 that has rotated along with the rotation of the table T2 stops at the stop position 4, the cylinder 52 operates to move the roller 53 forward so that the roller 53 is brought into contact with the contact plate 51.
, The chamber lid 26 is pressed against the chamber body 25 with a predetermined pressure, and then the roller 53 is pressed against the contact plate 51 for a while even after the vacuum chamber 17 starts rotating toward the next stop position. After that, the roller 53 is returned to the initial retracted position at an appropriate timing to prepare for the next operation.

The operation timing of the cylinder 52 is not limited to the above-mentioned one. For example, the cylinder 17 is operated immediately before it stops at the stop position 4, or the roller 52 is always urged forward by a predetermined pressure. Needless to say, various operation timings can be set within the range of the purpose of pressing the chamber lid against the chamber body at least at the time of starting the evacuation. Further, as a means for installing the roller 53 in a retractable manner, a spring or the like that constantly biases the roller 53 forward may be used instead of the cylinder 52.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention. Here, the pressure welding device 50 of the first embodiment is used.
Instead, a pressure welding device 55 is provided. The pressure welding device 55 includes a roller 56 mounted on the surface of the chamber lid 26 and a pressure welding plate movably supported by a support base 57 installed outside the chamber lid 26 at the stop position 4 via a spring 58. And 59. And table T2
When the chamber 17 that has been rotated due to the rotation of is approaching the stop position 4, the roller 56 contacts the pressure contact plate 59, and then stops at the stop position 4 while compressing the spring 58 (virtual line → solid line). . On the contrary, during this time, the pressing plate 59 presses the roller 56 by the urging force of the compressed spring 58 and presses the chamber lid 26 against the chamber body 25.

As a means for installing the pressure contact plate 59 so that it can expand and contract, instead of using the spring 58, the pressure contact plate 59 is installed by a cylinder so that it can expand and contract, as in the first embodiment. It can also be operated at an appropriate timing (including always urging forward).

(Embodiment 3) FIG. 5 shows a third embodiment of the present invention. Here, the pressure welding device 50 of the first embodiment is used.
Instead, a pressure welding device 60 is provided. The pressure contact device 60 includes a second cam roller 61 attached to the lower portion of the drive rod 38.
And a pressing cam 62 that is installed below the cam roller 61 at the stop position 4 and that rolls. Then, when the vacuum chamber 17 that has rotated with the rotation of the table T2 approaches the stop position 4, the cam roller 61 contacts the upward cam surface 62a of the pressure contact cam 62, and then rolls along the cam surface 62a. As a result, the drive rod 38 is pushed up (pressing margin s1), and the chamber lid 26 is pressed against the chamber body 25. When the vacuum chamber 17 starts rotating from the stop position 4 to the next position,
The cam roller 61 is soon separated from the cam surface 62a, and the pressure contact operation ends. In this third embodiment, instead of providing the cam roller 61, the cam roller 39 that rolls the open / close cam 40 is used, and at the stop position 4, the cam roller 39 below the cam roller 39 rolls to a position where the cam roller 39 rolls. The pressure contact cam 62 may be provided. That is, without separately providing the cam roller 61, the cam roller 3
The press contact device 60 may be configured with the press contact cam 9 and the press contact cam 62.

(Embodiment 4) FIG. 6 shows a fourth embodiment of the present invention. Here, a pressure welding device 65 is provided in place of the pressure welding device 60 of the third embodiment. The pressure contact device 65 includes the second cam roller 61 attached to the lower portion of the drive rod 38.
And a pressure contact plate 67 attached to the tip of the cylinder 66. Then, when the vacuum chamber 17 that has rotated along with the rotation of the table T2 approaches the stop position 4, the cylinder 66 operates and the pressure contact plate 67 advances (solid line → virtual line), and the cam roller 61 causes the pressure contact plate 67 to move. The upper surface of the chamber, the driving rod 38 is pushed up (pressing margin s2), and the chamber lid 26 is moved to the chamber body 2.
Pressed against 5. Then, after the vacuum chamber 17 starts rotating toward the next stop position, the pressure contact plate 67 is returned to the initial retracted position at an appropriate timing to prepare for the next operation. In the fourth embodiment, instead of providing the cam roller 61, the cam roller 39 that rolls the opening / closing cam 40 may be used, and the pressure contact plate 67 may be provided at the position where the cam roller 39 rolls. That is, the press contact device 65 may be configured by the cam roller 39 and the press contact plate 67 without separately providing the cam roller 61.

The operation timing of the cylinder 66 is not limited to the above-described one. For example, the cylinder 66 is operated when the vacuum chamber 17 is stopped at the stop position 4, or the pressing plate 67 is always urged forward with a predetermined pressure. Needless to say, various operation timings can be set within the range of the purpose of pressing the chamber lid against the chamber body at least at the start of vacuuming.

[0026]

According to the vacuum packaging machine of the present invention, the chamber lid of the vacuum chamber that has reached the evacuation start position is pressed and pressed against the chamber body, so that the chamber body and the packing are started at the start of evacuation. , And the chamber lid are kept tight to each other so that vacuum leakage does not occur, and therefore no loss time occurs, and it becomes possible to reach a predetermined vacuum pressure in a short time. There is an effect that it can be vacuum packaged. Also,
Since the chamber lid is pressed by the pressure welding device, the bulky packaging bag can be well shaped.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a vacuum chamber portion for explaining a pressure welding device in a vacuum packaging machine according to a first embodiment of the present invention.

FIG. 2 is a lateral sectional view of a vacuum chamber portion for explaining the pressure welding device.

FIG. 3 is a diagram showing an overall arrangement of a vacuum packaging machine and a filling machine according to the first embodiment.

FIG. 4 is a lateral cross-sectional view of a vacuum chamber portion for explaining a pressure welding device according to a second embodiment.

FIG. 5 is a diagram illustrating a pressure welding device and an opening / closing mechanism of a third embodiment.

FIG. 6 is a diagram illustrating a pressure contact device and an opening / closing mechanism of a fourth embodiment.

FIG. 7 is a vertical cross-sectional view of a vacuum chamber portion for explaining a conventional vacuum packaging machine.

FIG. 8 is a diagram illustrating an opening / closing mechanism of a conventional vacuum packaging machine.

[Explanation of symbols]

T2 vacuum table 25 chamber body 26 Chamber lid 34 packing 27 Opening / closing mechanism 38 Drive rod 39 Cam roller 40 open / close cam 44 Open / close lever 50, 55, 60, 65 Pressure welding device

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65B 31/00

Claims (6)

(57) [Claims] 1. A chamber main body having openings at predetermined intervals around an outer periphery of a table which is intermittently rotated while repeatedly starting and stopping, and an opening of each chamber main body rotatably supported at an upper portion. It has a chamber lid that opens and closes with respect to each other to form a vacuum chamber by engaging with the chamber body through a packing when closed, and an opening and closing mechanism that opens and closes each chamber lid, and stores a bag filled with a filling material in the vacuum chamber. A vacuum packaging machine adapted for vacuum packaging, wherein a pressure welding device is provided for pressing the chamber lid at the vacuuming start position of the table and pressing it against the chamber body.
A contact plate, a contact plate provided on the surface of the chamber lid, and
Extend to a position outside the chamber lid at the evacuation start position.
It consists of a roller installed so that it can be contracted freely.
It comes into contact with the writing pad and presses it toward the inside.
Vacuum packaging machine, characterized in that that. 2. The opening / closing mechanism includes a vertical drive rod installed on a table so as to be vertically movable, a cam roller attached to each drive rod, an opening / closing cam that rolls when the cam roller comes into contact, and an intermediate portion. It comprises an opening / closing lever that is pivotally supported and has a tip connected to the chamber lid and a base end connected to the drive rod, and displaces each drive rod while the cam roller rolls along the open / close cam to open / close the chamber lid. The vacuum packaging machine according to claim 1, wherein the vacuum packaging machine is configured as follows. 3. Intermittent rotation while repeating start and stop
Around the table around the
The chamber body attached to the
It is supported by the existing chamber and opens and closes the opening of each chamber body
When the vacuum chamber is
Chamber lids to be formed and opening and closing machine for opening and closing each chamber lid
And a bag filled with filling material is stored in the vacuum chamber.
A vacuum packaging machine adapted for vacuum packaging, comprising:
The chamber lid at the vacuum evacuation start position.
A pressure welding device that presses this against the chamber main body is provided.
A contact device, a roller provided on the surface of the chamber lid,
Extend to a position outside the chamber lid at the evacuation start position.
It consists of a pressure contact plate installed so that it can freely contract, and the pressure contact plate
It contacts the roller and presses it inward.
Vacuum packaging machine, characterized in that that. 4. The opening / closing mechanism is vertically movable on a table.
Vertical drive rods installed in the
Cam roller and the opening / closing cover that makes contact with the cam roller and rolls.
And the middle part is pivotally supported and the tip is connected to the chamber lid.
The base end consists of an opening / closing lever connected to the drive rod,
Each drive is performed while the cam roller rolls along the open / close cam.
The movable rod is displaced to open and close the chamber lid.
Vacuum packaging according to claim 3, characterized in that
Machine. 5. Intermittent rotation while repeating start and stop
Around the table around the
The chamber body attached to the
It is supported by the existing chamber and opens and closes the opening of each chamber body
When the vacuum chamber is
Chamber lids to be formed and opening and closing machine for opening and closing each chamber lid
And a bag filled with filling material is stored in the vacuum chamber.
A vacuum packaging machine adapted for vacuum packaging, comprising:
The chamber lid at the vacuum evacuation start position.
A pressure welding device that presses this into the chamber body is installed, and
The closing mechanism is a vertical drive that is vertically movable on the table.
Drive rods, cam rollers attached to each drive rod, and
The open / close cam that the muller contacts and rolls, and the middle part is rotatably supported.
The tip is connected to the chamber lid and the base is connected to the drive rod.
It consists of an opening and closing lever that connects, and the cam roller opens and closes
While rolling along the cam, each drive rod is displaced to
The chamber cover is opened and closed, and the pressure contact device includes a second cam roller attached to the drive rod and a pressure contact cam on which the second cam roller rolls. A vacuum packaging machine, wherein the drive rod is displaced by rolling along a cam, and the chamber lid is pressed by the opening / closing lever at the vacuum evacuation start position to make pressure contact with the chamber body. 6. Intermittent rotation while repeating start and stop
Around the table around the
The chamber body attached to the
It is supported lifting the standing open and close relative to the opening of the chamber body, closed
When the vacuum chamber is
Chamber lids to be formed and opening and closing machine for opening and closing each chamber lid
And a bag filled with filling material is stored in the vacuum chamber.
A vacuum packaging machine adapted for vacuum packaging, comprising:
The chamber lid at the vacuum evacuation start position.
A pressure welding device that presses this into the chamber body is installed, and
The closing mechanism is a vertical drive that is vertically movable on the table.
Drive rods, cam rollers attached to each drive rod, and
The open / close cam that the muller contacts and rolls, and the middle part is rotatably supported.
The tip is connected to the chamber lid and the base is connected to the drive rod.
It consists of an opening and closing lever that connects, and the cam roller opens and closes
While rolling along the cam, each drive rod is displaced to
The chamber cover is opened and closed, and the pressure contact device includes a second cam roller attached to the drive rod and a pressure contact plate movably supported at a vacuum drawing start position. The second cam roller is contacted to displace the drive rod, and the chamber lid is pressed through the opening / closing lever to press the chamber body at the vacuum evacuation start position. Vacuum packaging machine.