JPH0534217B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention involves arranging a large number of flat plates in a substantially circular shape with their surfaces facing outward, and intermittent rotation of these plates together. Two lids were installed on the outside of each board, and these lids were brought into contact with the circulating boards to form an airtight chamber inside. This invention relates to a rotary vacuum packaging device that applies a vacuum to an item to be packaged in a packaging bag.

(Prior art) A conventional rotary vacuum packaging machine continuously rotates a large number of plates and a number of lids corresponding to the number of plates, and the plates and lids are rotated during the rotation. Relatively heavily equipped items that are vacuum packed in contact with each other,
Further, as shown in Fig. 12, a large number of plates 3, 3... are intermittently rotated by the rotor 4 on each side of the plate, and the lids 1, 2 are rotated on each side of the plates 3, 3, etc. only while the rotor is stopped.
There are relatively light equipments that are vacuum packaged in contact with 3.

(Problems to be Solved by the Invention) In particular, in the latter case shown in FIG.
Due to the presence of two 2s, each disc is intermittently rotated by two sides at a time, but while the rotor is rotating, the lid material separates from the disc and rotates two sides at a time. The lid material does not move aggressively and is inefficient. Desirably, by shortening the time that the lid is away from the board, even if the time that the lid is away from the board is small, it can significantly affect the output of vacuum-packed products over a long period of time, such as a day. It makes a difference.

In view of the above points, the present invention aims to improve efficiency by shortening the time during which the lid member is away from the board.

(Means for Solving the Problems) In order to achieve the above object, the present invention arranges a large number of boards in a substantially circular manner around a central axis so that the surfaces of the boards face outward, and each of these boards is intermittently rotated at the same pitch as the arrangement interval of each board to support and transport the bag containing the packaged items on each board, while facing the front of two adjacent boards among the boards. In a vacuum packaging device, two lids are provided so that the bag opening is sealed after a vacuum is applied to the airtight spaces formed inside the two plates and the lids, respectively. , a horizontal arm rotatably supported at one end on the central axis; a hand bar pivoted to the other end of the arm so as to be swingable toward the board via a horizontal pin; and a hand bar that is suctioned to the board. The arm is swung back and forth by the same angle as the movement pitch of each board so that the lid material that has been moved is returned in the opposite direction to the movement of the board by the support of the hand bar when each board is moved. A first driving means, a second driving means for swinging the hand bar about the pin so that the lid supported by the hand bar is brought into contact with the disc and separated from the disc, and the disc and the lid are the same. It is constructed by a switching valve that connects a line between the inside of the lid member and the vacuum source when the lid member moves in the opposite direction, and cuts off the line when the lid member returns in the opposite direction to the disk.

(Function) A large number of disks arranged in a substantially circular manner intermittently rotate one pitch at a fixed time interval. The two lids facing two adjacent plates among the many plates mentioned above come into contact with the two stopped plates, move one pitch together with the plates while remaining in contact with the plates, and then move again. When each disk rotates one pitch, the lid material is moved back by one pitch in the direction opposite to the rotation of the disk in the carrying device.

In this case, two pieces of lid material are adsorbed to the board and one
Even when moving only one pitch, or when two lid materials are moved one pitch at a time alternately,
In either case, as a result, each lid moves backward by two discs due to the relative movement between the disc and the lid, and by repeating this movement, the disc and the lid come into contact. During this time, a vacuum is applied inside the lid material to perform the packaging operation.

(Example) As shown in FIGS. 1 and 2, a total of six plates 11, 11...
is fixed vertically, and the center of the rotor 10 is fixed to a shaft 12. The shaft 12 is composed of a cylindrical body 14 erected on a machine base 13, and a cylindrical shaft 15 rotatably provided around the cylindrical body and connected to the rotor 10. A geneva stop 16 is attached to the lower end of the cylindrical shaft 15. , and the rotor 10 is rotated around the cylindrical body 14 by the geneva stop.
It is arranged to rotate intermittently in 1/2 rotation increments.

As shown by symbols A to F in FIG. 1, each board 11...
Six sections are formed on the outside. A
2 is a bag feeding section that catches the bag X placed there by the suction force of the suction cup and supplies it toward the board 11. In FIG. An element 17a for catching the bag X is attached, the bag X is suspended from the tip of the spindle 17, and the bag
A cam plate 18 fixed to the cam plate 18 interferes with the spindle 17 so that the bag X can be caught and released by the element 17a. Also, B and C are the bags X
D and E are vacuum action sections; D and E are vacuum working sections;
F is a seal section that melts and seals the bag opening, and the two vacuum sections D and E have two lids 1.
9 and 20 are arranged facing the boards 11 and 11, respectively. As shown in FIG.
Reference numerals 9 and 20 have a box shape with an opening on the side facing the board 11, and a sealing stand 2 fixed to the board 11 inside the box.
A movable seal bar 22 is provided at a portion facing 1. As shown in FIG. 5, the movable seal bar 22 is elongated in the horizontal direction, and its both ends are slidably supported by guide pins 23, 23 provided on the inner surface of the lid material. Tension springs 25, 25 are provided on the guide pins so as to compress the air bag 24 interposed between the air bag 19 and the air bag 24, and a normally closed type port 26 is provided in the cover material to communicate with the inside of the air bag 24. Pushyu valve 27
has been established.

Furthermore, as shown in FIG. 1, two lid members 19,
20 communicate with a rotary valve 29 via tubes 28, 28, respectively. As shown in FIGS. 3 and 4, the rotary valve 29
It consists of a core block 30 with a circular cross section and a rotating sleeve 31 provided around it.
Two passages 32, 32 formed in the rotary sleeve 31 are connected in isolation to two vacuum sources via hoses 34, 35, respectively, while two passages 32, 32 formed in the rotary sleeve 31 are
The two passages 36 and 37 have the tubes 28 and 2.
8 are connected. Furthermore, two planar slits 38 and 39, which communicate the passages 32 and 33, are separately formed on the circumferential surface of the core block 30, so that the two vacuum sources and the two vacuum chambers are individually communicated with each other. Further, an atmospheric air intake port 40 is formed on a part of the circumferential surface of the core block, and a driving pinion 42 of a chain wheel 41 fixed to the upper surface of the rotating sleeve is connected via a chain 43, details of which will be described later. However, the rotating sleeve 31 rotates in one direction around the core block intermittently at an angle of 45 degrees.

As shown in FIG. 2, one end of an arm 44 is rotatably supported on the cylindrical body 14 below the Geneva stop 16, and a hand bar 44 is attached to the open end of the arm.
5 is pivotally supported via a joint pin 46, and a piston rod 48 of an air cylinder 47 supported on the arm 44 is connected to the hand bar 45, so that the hand bar 45 can be controlled in elevation. Moreover, the lid material 20 is attached to the upper end of the hand bar 45.
A connecting element 49 made of a permanent magnet is provided on the opposite surface. The permanent magnet 49 has a magnetic force sufficient to support the weight of the lid member 20, and the magnetic force can be cut by operating the wire 50. This connecting element 4
It is easily possible to use an electromagnet, a suction cup, or a mechanical connection structure in place of the permanent magnet. Further, power is transmitted through a chain 52 to a chain wheel 51 fixed to the base of the arm 44, and this power is transmitted, for example, by rotating a cam to swing a bell crank. This constitutes a drive mechanism that transmits the motion of Swings horizontally within a 60 degree range. This 60 degree range is between the two vacuum action sections D and E in FIG. The hand bars 45 are programmed to rise and fall only once each time the hand bars 45 are stopped.

The detailed operation will be described later, but as shown in FIGS. 6 to 10, two lid materials 1
9, 20 and rotary valve 29 operate in the order shown. Figure 1 shows two lid materials 1
9 and 20 are both in contact with the plates 11 and 11, forming airtight vacuum chambers between each lid and each plate. In this case, the air cylinder 47 in FIG.
It is in a position to support the lid material 20. FIG. 1 corresponds to the state shown in FIG. 6, in which both the two vacuum chambers are open to a vacuum source, and a vacuum is applied within both vacuum chambers. As already explained with reference to FIG. 4, since the rotary sleeve 31 is designed to rotate intermittently at a 60 degree angle counterclockwise at predetermined time intervals, the next step is to rotate the rotary valve 29 as shown in FIG. Switching allows atmospheric air to be introduced into the second vacuum chamber while leaving the first vacuum chamber open to the vacuum source. Immediately after that, the air cylinder 47 in FIG.
The second lid member 20 supported by the connecting element 49 is pulled away from the board 11 by tilting it at a predetermined angle about the axis. Then, as shown in FIG. 8, the rotor 10 begins to rotate clockwise and moves the first lid member 19 on which the vacuum is applied from the front section to the rear section. 1st
An object to be packaged in a bag is placed inside the lid 19, and the object is moved together with the first lid 19 and subjected to a vacuum action, while the bag released from the second lid 20 is It is conveyed in the direction of seal section F in FIG. In FIG. 2, the rotor 10
begins to rotate clockwise in the plane, power is simultaneously applied to the arm 44 via the lower chain 52, causing the arm 44 to rotate counterclockwise by 60 degrees. Therefore, when the first lid member 19 rotates 60 degrees clockwise as shown in FIG. 8, the second lid member 20 rotates 60 degrees counterclockwise in synchronization with it, and the second lid member 20 rotates 60 degrees counterclockwise as shown in FIG. The second lid member 20 reaches the front section from the second section to the front section, so the second lid member 20 skips over one surface of the board and faces the rear board. Note that from FIG. 8 to FIG. 9, the inside of the first lid member 19 is kept open to the vacuum source, but the inside of the second lid member 20 remains cut off from the vacuum source. This is because, as shown in FIG. 4, the passage 36 is connected to the two vacuum sources via two planar slits 38 and 39, while the passage 37 on the other side passes through the area on the back side. It is. Immediately after the two lids have stopped at the position shown in FIG. 9, the air cylinder 47 in FIG.
The second lid member 20 supported on the plate 9 is brought into contact with the board 11. In other words, the state is as shown in FIG. The rotary valve 29 immediately rotates to open each of the two vacuum chambers to the vacuum source.
On the other hand, if the connecting element 49 fixed to the hand bar 45 is a permanent magnet or an electromagnet, the magnetic force will be cut, if it is a suction cup, the vacuum suction force will be cut, and if it has a mechanical grip structure, the grip force will be cut. Therefore, the connecting element 49 and the second lid member 20 are separated. Immediately, the arm 44 is rotated clockwise to a position facing the first lid member 19 in FIG. 10. Meanwhile, vacuum continues to be applied within the two vacuum chambers. In Fig. 6 and Fig. 10, two lid members 19, 2 are shown.
0 has been switched, but before the rotary valve 29 is switched as shown in FIG. 7, the connecting element 49 in FIG. 10 is in the first position.
It is supported close to the lid material 19. In FIG. 2, when the hand bar 45 stands up, the push valve 27 is pushed by its upper end. In Fig. 5, the hand bar 45
When the button presses the bushing valve 27 and the port 26 is opened, the air bag 24 in the vacuum chamber 53 rapidly expands due to the pressure difference, sealing the mouth of the bag X to the sealing base 21.
and the movable seal bar 22. At the same time, an impulse current is applied to the nichrome wire on the surface of the sealing base 21 to weld the bag opening. Immediately thereafter, as shown in FIG. 7, the rotary valve 29 rotates to introduce atmospheric air into the vacuum chamber. Then, there is no differential pressure in the air bag 24 in FIG. In this way, the two lid members 19 and 20 are alternately exchanged within a range of 60 degrees to vacuum-pack the object placed inside.

FIG. 11 shows an embodiment in which an endless chain 53 is installed outside the rotor 10 to move the lid member from the rear section to the front section. In this embodiment, an element 54 for pulling the lid 20 away from the disc and an element 55 for moving the lid towards and back from the disc are located in two sections. In addition, in the illustrated embodiment, the rotor 1
0 has a structure in which each board 11, 11, . . . is transported in a perfect circular orbit, but the discs may be transported in an elliptical orbit by a rotor.

(Effects) In the present invention, the lid material is brought into contact with the disc and rotated together, a vacuum is applied inside during this rotation to perform vacuum packaging, and then the lid material is separated from the disc and retreated. When the disk rotates, the disk is moved forward one side of the disk at the same time, and the interaction between the cover and the disk is faster than in the conventional case where the cover waits for the disk to rotate. Since the lid material quickly faces the rear panel with a circular motion, the time that the lid material is away from the panel can be shortened and packaging efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the - line of the previous figure, and FIG.
Figure 4 is a - line sectional view of the previous figure.
5 is a sectional view taken along the - line in FIG. 2, FIGS. 6 to 10 are action explanatory diagrams,
FIG. 1 is an explanatory diagram of another embodiment, and FIG. 12 is an explanatory diagram of a conventional example. DESCRIPTION OF SYMBOLS 10... Rotor, 11... Disc, 16... Geneva stop, 18... Cam plate, 19... First lid material, 20... Second lid material, 22... Movable seal bar, 24... Air bag, 27...Pushyu dialect, 29
... Rotary valve, 31 ... Rotating sleeve,
40...Atmosphere intake port, 44...Arm, 45
...Handbar, 47...Air cylinder, 4
9... Connecting element, 53... Vacuum chamber.

Claims (1)

[Claims] 1 Arrange the boards approximately in a circle around the central axis so that the surfaces of the boards face outward, and rotate each board intermittently at the same pitch as the arrangement interval of each board to wrap the packaged items. While the accommodated bags are supported and transported on each of the boards, two lids are provided so as to face the fronts of two adjacent boards among the boards, and both the boards and both lids are connected to each other. A vacuum packaging device that seals the opening of a bag after applying a vacuum to an airtight space formed inside each includes a horizontal arm that rotatably supports one end of the arm on the central shaft; a hand bar pivotally supported at the other end through a horizontal pin so as to be swingable toward the board;
The arm is moved back and forth by the same angle as the movement pitch of each board so that the cover material that has been moved by adsorption to the board is returned in the opposite direction to the movement of the board by the support of the hand bar when each board is moved. a first drive means that swings the hand bar about the pin so that the lid member supported on the hand bar comes into contact with the board and moves it away from the board; A vacuum packaging device comprising a switching valve that connects a line between the inside of the lid and a vacuum source when the lid moves in the same direction as the lid, and cuts off the line when the lid returns in the opposite direction to the board.