JPS6335497B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a vacuum packaging device for filling bags with objects such as foods and liquids and vacuum-sealing the bags.

<Conventional technology> As a conventional vacuum packaging device, for example, Japanese Patent Application Laid-open No. 1986-
A device disclosed in Japanese Patent No. 20614 is known. The device disclosed in the publication is configured to intermittently rotate a rotor consisting of at least a heptahedron, which supports a bag in a suspended state with a pair of clamp claws, and each mechanism installed at a position facing the seven faces of the rotor, Bag supply, bag expansion, filling, liquid supply, first vacuum, second vacuum,
The structure is such that seven types of operations, including melt-sealing the bag opening, are performed sequentially at each station. This vacuum packaging device performs all processing at each station by clamping both sides of the bag in a vertically suspended state using clamp claws at the tips of a pair of left and right arms provided on the circumferential surface of the rotor. The opening of the bag is opened by the bag expansion mechanism, and processing is performed for filling, liquid replenishment, first vacuum, and second vacuum, and then, during the final bag mouth melt-sealing, the clamp claw moves in the width direction of the bag to tension the bag. That's what I do.

<Problems to be Solved by the Invention> However, in such a conventional vacuum packaging device, although the bag can be moved forward and backward in the bag width direction,
In many cases, all processing is carried out in a vertically suspended state using clamp claws, and especially after filling, even if the bottom of the bag, which has become heavy due to being filled with objects, is supported by a bottom support plate, the clamp claws The bag is easily damaged due to the large load applied thereto, and a large-scale clamping claw must be provided to withstand the load.

Furthermore, since the rotor is rotated while the bags are held vertically and suspended by the clamp claws, depending on the rotational speed of the rotor, the bags may swing due to inertia, and when the rotor stops, the bags do not stand still at each processing station, making it necessary to Processing requires a "waiting time" for the bag to come to a standstill, or it is necessary to slow down the rotor rotation speed to prevent the bag from swinging, and these requirements are necessary when dealing with somewhat heavy objects. This was noticeable when bags were filled with long pickled radish (for example, pickled radish).

Therefore, the present invention has been made with a focus on such conventional vacuum packaging equipment, and it has excellent bag support by reducing the load on the bags as much as possible, and even if the rotor is rotated quickly while the bags are suspended and supported. Even when the rotor rotates when handling a bag containing a fairly heavy object, the bag can be moved to the next station without shaking, and each station can perform the desired processing quickly. The purpose of the present invention is to provide a vacuum packaging device that can shorten the overall processing time.

<Means for Solving the Problems> Means of the present invention for achieving the above object will be explained with reference to FIGS. 1 to 14, which correspond to embodiments.

The rotor 2 includes a rotary table 16 provided on the pedestal 1 so as to be able to rotate intermittently, and
It consists of a plurality of base plates 20 erected on top. And this base plate 20 is
Each maintains an inclined state in which the lower part 22 protrudes outward from the upper part 21 (see Fig. 4), and an X
They are mutually rotatable at the intersection parts where they intersect in the shape of a letter, and each has a clamp claw 3 at its tip.
0 and 30, and each arm 32, 32 moves forward and backward in a direction perpendicular to the base plate 20 through the rotation, thereby opening both ends of the opening 74 of the bag 23. The distance between the clamp claws 30, 30, which are clamped and suspended, can be expanded and contracted, and each arm 32, 3
2 includes a clamp body 24 which is configured to retreat to a state where the side surface of the suspended bag 23 is brought into contact with and supported by the front surface of the inclined base plate 20 when the bag 23 is retreated; and a bag suction member 24 for opening the bag 23. It has a body 25 and a sealing stand 26 which serves as a cradle when vacuum sealing the bag opening, and is movable up and down at the bottom and supports the bottom of the bag 23 suspended in a non-rotating state. On the other hand, the receiving plate 4 discharges the packaged bag 23 downward by rotating downward.
2, and is provided with a bottom receiver 40 which also serves as a discharge device.

<Function> Then, the present invention first uses the above-mentioned means to process the bag 2.
3 is suspended and supported by a clamp body 24 in the bag feeding device 3. Then, the printing device 4 performs a printing process, and then the filling device 5 performs a filling process with the object to be filled. At this time, each clamp claw 3 of the clamp body 24
0, 30 in the width direction of the bag and in the outer direction perpendicular to the base plate 20, and if necessary, the bag adsorbent 25 is advanced to adsorb the bag 23, open the opening 74 of the bag 23, and remove the object to be filled. Fill it. First, each clamp claw 30 is moved back toward the base plate 20 until the side surface of the suspended bag 23 comes to rest against the front surface of the inclined base plate 20. Then, the bag 23 is brought into contact with the front surface of the inclined base plate 20 from the bottom to the top of the side surface of the bag 23, so that the surface of the bag 23, which has been made uneven by the object, becomes flat on the front surface of the base plate 20. While the weight of the bag 23 is increasing, a percentage of the load of the bag 23, which has increased in weight due to filling with objects, is supported. Moreover, by adding the support from the bottom receiver 40 to this, a more stable three-point support state is achieved, and the load burden on the clamp body 24 is further reduced. The bag 23, which is supported in a stable manner on the base plate 20 in this manner, is moved to the next station as the rotor 2 rotates without swinging as the rotor 2 rotates. Then, the next vacuum sealing device 6 seals the bag 2.
3 is pressed against the sealing stand 26 to complete degassing and sealing. Finally, the bag 23 is discharged by operating the bottom receiver 40 which also serves as a discharge device.

<Example> The details of the present invention will be explained below based on the illustrated example. In the following explanation, "outside" means the direction of arrow A in the figure, and "front" means "outside".
shall mean the side facing.

1 to 14 are diagrams showing an embodiment of the present invention.

This vacuum packaging apparatus mainly includes a stand 1, a rotor 2, a bag feeding device 3, a printing device 4, a filling device 5, and a vacuum sealing device 6.

First, the pedestal 1 covers the drive unit 7 of the rotor 2 (see Fig. 6) and piping equipment, and forms a mounting space for each device that operates in conjunction with the two rotations of the rotor, and has casters 8 on its lower surface. . Note 1a
is a pipe that connects the pedestal 1 and the rotor 2.
As shown in FIGS. 6 and 7, the drive unit 7 transmits the rotational force of the clutch brake motor 9 to the speed change shaft 11 via the reducer 10, and then from the speed change shaft 11 to the main shaft 12 of the rotor 2 to change the shaft ratio. Chain 1 at 1:4
It has a structure that conveys information through 3. Further, the clutch brake motor 9 is turned on and off by commands from an attached stop cam 14 and a stop micro switch 15, and the positioning for stopping the rotor 2 is performed using a motor fixed to the outer periphery of a rotary table 16, which will be described later. Stop micro switch 1 on V block 17
Wedge 19 with jig cylinder 18 according to command 5
This is done by driving in the wedge 19, and the wedge 19 is released after waiting for the completion of other devices.

The rotor 2 includes a rotary table 16 that intermittently rotates on the pedestal 1 via a main shaft 12, and a rotary table 1
It is mainly composed of a plurality of base plates 20 erected on 6. The base plate has an inclined shape in which a lower part 22 protrudes "outward" from an upper part 21. In the illustrated example, a base plate 20 having an inclination of 10 degrees is erected on the rotary table 16 so as to form four sides. The number of base plates 20 is determined by the number of stations for bag feeding, printing, etc., but in this embodiment, the number of stations is reduced to 4 as much as possible.

The base plate 20 has a clamp body 24, a bag adsorption body 25, and a seal stand 26 on its upper part 21.
It is equipped with

More specifically, as shown in FIGS. 3 to 5, a vacuum chamber 27 (to be described later) of the vacuum sealing device 6 is provided in the upper part 21.
A protruding sealing stand 26 is provided for sealing the bag 23 together with a sealer 28 attached therein, and a sealing stand 26 is provided directly below the base of the sealing stand 26 with a rectangular opening in the front and protruding toward the rear side of the base plate 20. A recess 29 is formed and a clamp body 24 and a bag adsorbent 25 are provided. This clamp body 24 is provided with a pair of rotatable clamp claws 30, 30 at the tip, and the base end is provided with a pin 31 at the left and right side in the recess 29,
A pair of arms 32, 32 rotated and supported at 31
are crossed in an X-shape, and furthermore, elongated holes 33, 3 formed at the intersection of each arm 32, 32
A cross pin 34 serving as a fulcrum is provided at 3. Then, by pushing the cross pin 34 from the inside to the outside [rightward in FIG. 5], the pair of arms 32,
32 and opens the clamp claws 30, 30 together, the forward operation arm 36 is moved to the bottom surface 29a of the recess 29.
A pair of retracting plates are provided through the pins 31, 31 of each arm 32, 32 and the cross pin 34, and are retracted by pulling each arm 32, 32 at an approximately intermediate position between the pins 31, 31 of each arm 32, 32 and the cross pin 34, and closing the clamp claws 30, 30 together. Operating arms 37, 37 are provided similarly to the forward operating arm 36. In this way, the forward operation arm 3
By operating the arms 32, 32 with 6 and a pair of backward operating arms 37, 37, the bag 23, which is still clamped and suspended, is contracted in the width direction of the bag 23, and its opening 74 is opened. At the same time, the base plate 20 can be freely moved forward and backward in an outward direction orthogonal to the base plate 20, and can be positioned midway.

The bag adsorbent 25 has adsorption parts 38a and 38b at the tip.
A pair of first suction tubes 38, 38 each having a vacuum means are positioned on the left and right sides of the cross pin 34, and are provided to penetrate the bottom surface 29a of the recess 29. It should be noted that each of the forward operating arm 36, the pair of backward operating arms 37, 37, and the pair of first bag suction tubes 38, 38 is provided with an operating source (not shown) so as to be operated by air, for example.

At the lower part 22 of the base plate 20, there is a discharging device which is movable up and down and supports the bottom of the hanging bag 23 in the non-rotating state, while discharging the packaged bag 23 downward when the base plate 20 is rotated downward. A dual-purpose bottom receiver 40 is provided.

In detail, this bottom receiver 40 is shown in FIGS. 3, 4,
As shown in FIGS. 13 and 14, a receiving plate 42 is protruded from the front surface 20a of the base plate 20 and supported at right angles in each of the recesses 41, 41 that protrude toward the rear side of the left and right pair of base plates 20. Parallel links 43, 43, which can be rotated freely, are attached to pins 44a, 44b, 45.
a and 45b, respectively. This pin 4
Reference numeral 5b is a long rod-like member that connects the left and right parallel links 43, 43, and an operating lever 46 having an operation source (not shown) is attached to the center thereof.
A pair of springs 47, 47 with one end fixed to the base plate 20 are provided on both sides of the operating lever 46, and the parallel links 47, 47 are connected via keys 48, 48 to bring the receiving plate 42 into the desired state.
It is connected to 3,43. Receiver plate 42
As shown in FIG. 14, the parallel links 43,
It is supported by a plurality of pins 43b protruding from a pair of front and rear and left and right vertical arms 43a forming a 43, and is provided with a hook 43c that selectively engages with the plurality of pins 43b. . Therefore, by changing the engagement position of the hook 43c with the pin 43b in the vertical direction, the mounting height position of the receiving plate 42 can be adjusted according to the height of the bag 23.

As shown in FIGS. 1, 2, and 8, the bag feeding device 3 is rotatable by a rotary cylinder 49 about the upper part of a pair of left and right base brackets 3a fixed on the pedestal 1 as a fulcrum 50a. It is mainly composed of a clamping/rotating arm 50, a stopper 51 of the clamping/rotating arm 50, and a stocker 52 tilted approximately 10 degrees with respect to the pedestal 1 for storing the bag 23. This clamping/rotating arm 50 is provided with a second suction body 53 which can be moved up and down by an extrusion cylinder 55, and a clamping cylinder 56 having a clamping tool 54 at its tip.

As shown in FIG.
3 is used for marking. Incidentally, since a conventionally known structure can be adopted, the details will be omitted.

As shown in FIGS. 1 and 9, the filling device 5 includes a hopper 58 which is supported by a stand 5a at a station next to the printing device 4 on the pedestal 1 and is automatically movable up and down via a vertical movement cylinder 57. bag 23
The third suction tube opens in conjunction with the first suction tubes 38, 38.
It is mainly composed of an adsorbent 59. Incidentally, a wire opening device 60 is attached to the hopper 58 as a bag opening means. When filling liquid juice as a filling object, a liquid juice filling device (not shown) is used to fill the pipe 61.
The bag 23 is filled with liquid juice.

The vacuum sealing device 6 is shown in FIGS. 1, 10, and 1.
As shown in FIG. 1, a vacuum chamber 27 that can be opened and closed by a pressure cylinder 6b having a fulcrum 6a at a station next to the filling device 5 on the pedestal 1, a sealer 28 for sealing the bag 23, and a vacuum chamber 27 for sealing the bag 23,
Molding plate 6 for pressing 3 to make it as flat as possible
It mainly consists of 4 and more. Specifically, the vacuum chamber 27 is integrated with the base plate 20 to form a chamber 65;
Since the amount of protrusion of the pair of arms 32, 32 on the base plate 20 side during vacuum processing is small, the depth D is correspondingly shallower, and the volume is also smaller accordingly. This vacuum chamber 27 includes a blow valve 66,
It is connected to a vacuum pump (not shown) via a vacuum valve 67. The bag sealing sealer 28 is supported by a pair of left and right air cylinders 68 and a return spring 69, as shown in FIG.

The forming plate 64 is tilted and supported within the vacuum chamber 27 at a fulcrum 70, and the air cylinder 71 presses the bag 23 against the base plate 20, correcting the unevenness of the bag 23 and flattening the overall shape. It is something. Air cylinder 71 is valve 7
It is connected to a vacuum pump via 2. Nao 73
indicates a return spring.

Next, the operating state will be explained.

[I] First, let's talk about the bag feeding device 3, as shown in Figure 1.
As shown in FIGS. 2 and 8, the second adsorbent 53 is lowered by the pressure cylinder 55 onto the upper surface of the horizontally placed bags 23 that have been supplied in advance to the stocker 52 in large numbers, and after adsorbing the bags 23 is raised. The clamping cylinder 56 clamps the tip of the bag 23 with the clamping tool 54, and the rotating cylinder 49 works to clamp and
The rotating arm 50 rises and comes into contact with the stopper 51, waits for the bag 23 to be clamped by the clamp claws 30, 30 provided on the upper part of the base plate 20, and then releases the clamp and returns to its original state. This action causes the next base plate 20 to move to the bag feeding device 3 in response to the intermittent rotation by the rotor 2.
By coming before it, it will be reproduced.

[] Regarding the rotor 2, in the rotor 2 which is intermittently rotated by the drive unit 7 shown in FIGS. 6 and 7, the bag 23 is connected to the printing device 4, the filling device 5,
The clamp claws 30, 30 of the base plate 20 until the series of steps in the vacuum sealing device 6 are completed.
It is clamped to and continues to be suspended.
That is, as shown in FIGS. 3 to 5 and 12, the bag 23 is firmly and reliably clamped on both sides of the upper part by clamp claws 30, 30 provided at the ends of a pair of arms 32, 32, respectively. The bags 23 are moved intermittently to the station of each device that operates in conjunction with the rotation of the bag 23, which is required for each processing step.
The holding position of the clamp claw 30 can be moved forward and backward in a direction orthogonal to the base plate 20 by operating the forward operation arm 36 and the pair of backward operation arms 37, 37, and can be freely positioned in the middle.
By adjusting the interval l between the bags 23, the opening 74 of the bag 23 is relaxed or tightened, that is, opened and closed, and if necessary, the bag 23 is opened by suction operation of the first bag suction tubes 38, 38. This makes it easier to operate each device. Furthermore, prior to the rotation of the rotor 2, the bags 23 suspended from each base plate 20 located at each station are
While being supported by the clamp claws 30, 30, they are "retracted" toward the base plate 20 by the action of the retraction operation arms 37, 37, respectively,
As a result, each bag 23 is made to lean against and contact the front surface 20a of the inclined base plate 20, and is supported in a stable state.
The front surface 20a of the base plate 20 and the bottom support 40, specifically the support plate 42, provide a more stable three-point support state. As a result, even if the rotor 2 rotates quickly or even if the bag 23 is filled with a heavy object, the bag 23 will not swing and will be moved to the next station according to the rotation of the rotor 2. After the rotor 2 is rotated and positioned, each bag 23 is moved again to the base plate 20 by the forward operating arm 36 before each desired treatment is performed at each station.
It is moved and positioned in the outward direction.

[] Regarding the printing device 4, when the rotor 2 rotates 90 degrees from the bag feeding device 31, the bag 23 is moved to the printing station, and at this time, the distance l between the clamp claws 30, 30 is maximized, and the bag 23 is vertically suspended. The bag 23 is in the lowered state, and a printing tool (not shown) operates at a suitable location on the bag 23, and the printing device 4 marks the date and other marks there.

[] Regarding the filling device 5, when the rotor 2 rotates 90 degrees from the printing station as shown in FIGS. It is pushed by the forward operation arm 36 so that the distance l changes from the maximum state to the minimum state, and at this time, the first bag suction tubes 38, 38 and the The three suction bodies 59 each approach and then retreat, opening the opening 74 and the entire bag 23. Next, while the hopper 58 is lowered by the vertical cylinder 57, the opening 74 is further opened by the wire opening device 60. This sufficiently opened opening 74 is filled with the object from the hopper 58. Furthermore, liquid juice is filled from the pipe 61. The bag 23 after filling is supported by the clamp claws 30, 30 and the receiving plate 42, and then the pair of arms 32, 32 are connected to the backward operation arm 3.
7, 37 to maximize the distance l between the clamp claws 30, 30, close the opening 74, and move the pair of arms 32, 32 into the recess 29 protruding toward the rear side of the base plate 20.
While moving backward in the direction in which the bag 23 is accommodated, the bag 23 is brought into contact with the front surface 20a of the inclined base plate 20 from the bottom to the top of the side surface of the bag 23, thereby flattening the surface of the bag 23 that has been made uneven by the object. As a result, a percentage of the load of the bag 23, which has increased in weight due to filling with objects, is supported by the inclined front surface 20a of the base plate 20, and the aforementioned bottom receiver 40, specifically, the support plate 42 thereof, Together with this, the clamp claws are 30, 30.
This reduces the load bearing. As shown in FIG. 10, the support point X of the bag 23 by the clamp claws 30, 30 in the state filled with the object is moved to the front surface of the base plate 20 by the pair of arms 32, 32 retreating in a direction perpendicular to the base plate 20. 20a moves to the support point Y, and as a result, the height relative to the receiving plate 42 (that is, the length of the vertical line segment from the support point X) is reduced by H, and the bag 23 is at the support point Y. The lower portion remains supported by the receiving plate 42, and the load applied to the clamp claws 30, 30 is reduced accordingly.

[V] The vacuum seal device 6 and discharge device 40 will be described. 1st, 4th, 5th, 10th, 11th
As shown in the figure, the rotor 2 is removed from the filling station.
When rotated through 90 degrees, the vacuum chamber 27 is then advanced by the pressure cylinder 6b to form a chamber 65 suitable for a relatively small volume of vacuum around the bag 23 in contact with the front surface 20a of the base plate 20. Next, when the vacuum valve 67 is opened and a vacuum pump (not shown) is activated, the inside of the bag 23 and the bag 2 are
The air around 3 will be quickly evacuated. Then, when the vacuum is terminated, the pair of backward operation arms 37, 37 pull the pair of arms 32, 32, keeping the gap l between the clamp claws 30, 30 at the maximum, and keeping the opening 74 of the bag 23 under tension. A pair of left and right air cylinders 68
is operated to press the sealer 28 toward the sealing stand 26 to heat seal the opening 74. At this time, the forming plate 64 functions to press the bag 23 at the same time when the vacuum chamber 27 comes into contact with the base plate 20 so as to flatten the shape of the bag 23 as much as possible. Thereafter, the blow valve 66 is opened, and the inside of the vacuum chamber 27 is blown to move the vacuum chamber 27 backward. Finally, the operating lever 46 of the bottom receiver 40, which also serves as an ejector, is pushed, and the pair of left and right parallel links 4
3, 43 to open the clamp claws 30, 30 while tilting the receiving plate 42, and remove the bag 23.
is dropped toward the lower right in FIG. 4 and discharged onto a chute (not shown) serving as a discharge station. Further, the rotor 2 rotates intermittently, bags are fed at the previous bag feeding station, and the above-described processes are continuously repeated.

<Effects of the Invention> Since the vacuum packaging apparatus according to the present invention is as described above, it has the following effects.

The base plate is in an inclined state, and the side surface of the bag is contacted and supported by this base plate, and the bottom of the bag is supported by the receiving plate of the bottom holder provided at the bottom of the base plate.
A more stable three-point support condition is obtained, and (a) the bag is less likely to swing when the rotor rotates;
The rotation speed can be increased by that amount, and the overall processing speed can be improved.

(b) The phenomenon of bags tearing due to their own weight can be prevented, and as a result, it is possible to deal with increases and decreases in the amount of filling with bags of the same shape and capacity, making it more convenient to process products with various fillings. Become.

The arms of the clamp body can move forward and backward in a direction perpendicular to the base plate, and when retracting, most parts of each arm are stored in a recess formed from the front side to the rear side of the base plate. (c) The amount of protrusion of the clamp body relative to the front surface of the base plate can be almost eliminated, and the volume or depth of the chamber can be reduced by that amount, and the reduction in volume can be more than compensated for the increase toward the rear surface of the base plate due to the recess. As a result, the vacuum degassing time can be shortened and the overall processing speed can be improved.

(d) By positioning the advancing and retracting arm midway, the bag can be positioned at the optimum position for each processing process, further improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is an overall plan view showing an embodiment of a vacuum packaging apparatus according to the present invention, FIG. 2 is an overall side view taken from the direction of the arrow in FIG. 1, and FIG. - A front view of the base plate seen from the line direction, Figure 4 is a side view of the base plate, vacuum sealing device, and discharge device seen from the arrow direction in Figure 1, and Figure 5 is a front view of the base plate seen from the line direction.
The figure is a plan view taken from the direction of arrow V in Fig. 4, Fig. 6 is a schematic explanatory diagram of the drive section, Fig. 7 is an explanatory diagram of the rotor stopping and positioning section, and Fig. 8 is a schematic side explanation of the bag feeding device. 9 is a schematic side view of the filling device, and FIG. 10 is a schematic side view of the vacuum sealing device.
Figure 1 is a schematic plan view of the sealer in Figure 10;
Figure 2 is a schematic plan view of the clamp body, Figure 13 is the third
4 and 4, and FIG. 14 is a perspective view of essential parts of the bottom receiver. 1... Frame, 2... Rotor, 3... Bag feeding device,
4...Printing device, 5...Filling device, 6...Vacuum sealing device, 16...Rotary table, 20...Base plate, 21...Top part of base plate, 2
2... Lower part of Vero plate, 23... Bag, 24
... Clamp body, 25 ... Bag adsorption body, 26 ... Seal stand, 40 ... Bottom receiver (discharge device).

Claims (1)

[Scope of Claims] 1 Bag feeding, printing, filling, vacuum sealing, and discharging stations are arranged on the circumferential surface of a rotor that supports bags in a suspended state and rotates intermittently, and automatically and continuously as the rotor rotates intermittently. In a vacuum packaging device that fills a bag with objects and seals it under vacuum, the rotor has a rotary table installed on a stand so that it can rotate intermittently, and a rotary table that is tilted so that the lower part protrudes outward from the upper part. It is formed of a plurality of base plates set upright on a rotary table, and the upper part of each base plate is mutually rotatable at the intersection parts crossed in an X shape, and has a clamp claw at the tip of each base plate. The arms are provided with a pair of arms, and each arm moves forward and backward in a direction perpendicular to the base plate through the rotation, thereby adjusting the distance between the clamp claws that clamp both ends of the opening of the bag and suspend it. The clamp body is expandable and retractable, and each arm retreats to the point where the side of the suspended bag comes into contact with and supports the front surface of the slanted base plate. When retreating,
A recess formed from the front side to the rear side of the base plate in order to store most of the parts of each arm on the rear side of the base plate, a bag suction body for opening the bag, and a vacuum at the bag opening. A seal stand is provided at the bottom of each base plate to serve as a cradle for sealing, and the bottom of each base plate is movable vertically. A vacuum packaging device characterized in that a bottom receiver is provided with a receiving plate for discharging a packaged bag downward.