JPS6068224A - Rotary vacuum packer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention relates to the structure of a machine that sequentially wraps the items to be packaged in bags within the box.
The present invention is characterized in that a bag containing an object to be packaged can be accurately supplied from a bag-making conveyor to a prescribed position on a table forming a part of the vacuum box.

As shown in Fig. 5, this type of vacuum packaging machine transports a large number of tables +21 f2)... in a circular orbit by a transport device such as an endless chain (1), while a belt conveyor (3 ) is used to sequentially supply bags (4) containing items to be packaged onto the table (21), and then the lid plate (5), which is conveyed in parallel with the table (2), is placed on the table (21). ) to seal the inside of the box (6), and after evacuating the inside of the box (6), the heating material (7) is lowered by the actuator (8), and the pillow material provided on the table (2) is lowered by the actuator (8). (9) Between the bag (
4) is welded, and then the action of introducing the atmosphere into the box (6) is performed every 1 f cycle. As described above, in this type of packaging machine, the pillow material (9) on the table is an essential element to prevent the packaged items from coming out of the bag and to seal the bag opening well. However, due to the presence of the pillow material (9), a predetermined head difference t101 is formed between the top surface of the supply conveyor (3) and the top surface of the table (2), so that the bags are not deposited from the conveyor onto the table. When the person transfers the bag, the bag (4) must be dropped downward by the above-mentioned drop, and this impact causes the bag to be accurately placed in the specified position on the table (2).
It was difficult to supply and had the drawback that the seal position was shifted depending on each bag. Therefore, the present applicant first arranged a bed aυ on the table (2a) as shown in FIG. Then, the wheels (15) provided at the lower end of the rond are rolled on the rails (14) provided below the rotary disk μ step supporting the table, and the bed (11) is placed below the bag-making conveyor (3a). An application was filed for a system in which the bag (4a) is pushed up to the upper limit and transferred with a small drop F value, and then the bag (4a) is lowered together with the bed (ul) to the surface of the table (2a) (Utility Model Application No. 1983- 199
06) I did. However, after testing this product, it was found that it was difficult for the opening of the bag (4a) to fit precisely against the pillow material (9a). In other words, although the accuracy due to the head difference between the conveyor (3a) and the table (2a) has been improved, the bed U
It was found that when υ moves downward, vibrations are transmitted to the bag (4a), which deteriorates the positional accuracy. It is known that the vibration of the bag αa) can be reduced by loosening the descending gradient 04a) of the rail, but if the descending gradient 04a) is made longer, the rotation of the rotating disk (131) will cause the appearance of the light, the seal, and the atmosphere. The time for each reduction operation is reduced by that amount, and the time for other operations becomes insufficient.The only way to compensate for this is to reduce the speed of the rotating disk (13), resulting in a decrease in efficiency. Also, the uphill slope of the rail (1
Regarding 4b), if it is formed too steeply,
Force is applied diagonally to the rod circle, making it impossible to expect the bed αυ to rise smoothly. Therefore, since the gradient must be made gentler at this point as well, there is a loss of time during the 1f cycle.

In view of the above points, the present invention maintains the bed at a constant height and moves the table up and down in order to prevent vibrations from being applied to the bag.In order to achieve this purpose, the pillow material of each table is The other end of each table is pivoted to the rotor via a pin so that the provided end can swing up and down, and each table is tilted at a predetermined angle from horizontal to the rotor around the pin. At the same time, a bed is placed on top of each table, and the ends of the bed on the vertical swing axis side of each table are hinge-supported on the top surface of the table, and furthermore, the bed is supported by a hinge on the top surface of each table. The upper end of a spindle that passes through the section vertically and whose lower end is supported by a rotor engages with the lower surface of the bed to support each bed in a substantially horizontal state, while fixing a roller to the underside of the pillow material of each of the tables. A rail is arranged on the upper surface of the roller track with a predetermined slope.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows the relationship between a bag making conveyor 16) and a rotary vacuum packaging device. The conveyor 116
) is connected to the bag making and packaging apparatus and conveys bags containing objects to be packaged one after another at predetermined intervals. Also, the vacuum packaging device u'? ) fixes a large number of tables ω4... to the upper part of the periphery of a disc-shaped rotor bet, and also supports an upper cover plate I to the upper part of each table by arms (20) (20)... ) t2υ... is installed so that it can move up and down.

As shown in FIGS. 2 and 3, the rotor bet and each table uCJ are connected via an arm stand (2). The arm stand t2a has a branch arm (24) on its side. It protrudes and is attached to the table (the lower surface of one end of 11 is pivotally supported via a pin (to) and the arm stand (bracket on the other side of the two points) G33) at the tip of the branch arm, or a variable stopper (341 is used to attach the table to the table). The lower surface of the table is supported to restrict the pivoting of the table. b) and the rotating centrifugal side (0) are formed,
Place a slightly small bed on the table, and place the end of the bed ρω on the rotation center side (B) above the table U@
While hinge-supported on the upper surface of the
), a pillowcase Q7) is provided on the top surface of the table, and a pillow 8) is provided on the bottom surface of the table. Furthermore, a sleeve 12!1 passes vertically through the center of the plane of the table
A spindle is inserted into the sleeve, and a pulley Gυ rotatably provided at the lower end of the spindle is engaged with a groove-shaped guide 621 fixed laterally to the arm stand, and the spindle is inserted into the sleeve. (30) supports the bed (c) in a horizontal state.

On the other hand, details of each upper cover υ shown in FIG. 1 are shown in FIG. 4. In other words, the upper lid C! υ is box-shaped with an open bottom, and a continuous seal 051 is provided on the edge of the opening, and the sealer 06) provided inside is connected to the actuator (37) (
The two are connected together, and a hose connection is connected to the vacuum pump. Further, as shown in FIG. 2, a rail f40 having a predetermined slope is provided along the virtual trajectory of the rollers 12.

The illustrated embodiment is constructed as described above, and its operation will be explained below.

In FIG. 1, a rotor aa equipped with a large number of tables (19) ua... continuously rotates counterclockwise, while each upper cover (21) (21)...
It revolves synchronously with L'l...

Each of the upper lids υ is rotated by an arm c! in the vicinity of the bag-making conveyor 6). It is lifted up by O and leaves the table (19), but in other areas it tightly covers the table (19) and forms an airtight chamber inside. On the other hand, the bag-making conveyor μ0 rotates at substantially the same speed as the rotor, and supplies bags containing objects to be packaged to the vacuum box one after another.

On the other hand, as shown in FIG. 2, the table M9 is normally transported by tilting due to its own weight and placing the load on the stopper 64. However, the bed G251 is always held horizontally by the spindle G30) and is transported by the sliding part on the bottom of the bag making conveyor (Le).
Transfer from bed 125) to bed 125) with a small drop. after that,
The roller (c) rides on the rail (401) and is lifted around the table (l is bin I7!4),
Support the opening of the bag ■ from below with the pillow material Uω. In this case, as the table stand 9 moves upward, the pulley 313 rolls on the guide (34), so the inclination of the axis of the spindle (7) is smoothly corrected, and the bed table 9 is maintained in a horizontal state.

As shown in Figure 4, the table (19
) is pushed up, a top lid υ is placed over it, making the area around the prisoner completely airtight. Air around and inside the bag (2) is then removed via the hose connection.

At this point, the table (191) is firmly adsorbed to the top cover υ due to the pressure difference, so the presence of the rail (4a) is not necessarily important in this case.When fluid acts on the actuator (37), the sealer (36) ) is −
1.Press the opening of the bag (1) with the pillow U'+27) and weld it.

2-tj)il+ 士-11JQI -h>1-岱(Δ)/7)l#Il+-7111::'N-
When the table (1 old) is lowered by its own weight, the upper lid (
2υ is also lifted upward by arm RO). However, the bed sheet ω is kept in a horizontal state by the spindle strike, and once the packaged product has been scraped off from above it, a new bag is fed onto it again at the conveyor u6) position.

As can be understood from a functional point of view, the spindle (7) corresponds to the leg that supports the bed (C) on the branch arm C. In the embodiment, since the spindle G (It) is hermetically fitted into the sleeve (4), the axis of the spindle (30) swings within a certain angle range as the table U moves upward. 1.30) and the hole of the table ([9) through which it passes] are made loose, and the area around the hole is kept airtight with a flexible packing such as a bellows. Both ends are bed I25) and branch arm I23)
It can be firmly fixed to the Also, the scope of claims (′″
-1 Although the constituent elements have been specifically described using the F-level concept, such as "bin" and "coro," any design changes that perform the same function are included in the technical idea of the present invention.

As described above, the present invention maintains the bed at a constant height to reduce the height difference between the bed and the bag-making conveyor u6). 2) is designed to move up and down around the axis, and the pillow material @ is lifted from C to support the opening of the bag on the bed.

In this way, the bed does not move up and down under full heat, so compared to the conventional product that moves the bed up and down as shown in Figure 6, no vibration is applied to the bag, and the bag opening can be sealed by supporting the designated area with pillow material. Therefore, a vacuum packaging device with good appearance and good sealing performance can be obtained. Moreover, as mentioned above, the table 4 does not move upward in a horizontal state, but only the other end with one end as an axis moves upward by swinging.
Even if the ascending slope in (1) is a little steep, the table moves upwards without difficulty, and even if the table descends rapidly, no vibration is applied to the bag, so the rail (4 (J)
Both slopes of the rail (2) can be made at a steeper angle (2).
40) can be configured to be short and the time required for peak packaging work during one revolution of the rotor can be increased, so there is no need to reduce the rotational speed of the rotor. This has the effect of improving packaging efficiency.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the previous fl-I line, Fig. 3 is a plan view of Fig. 1, Fig. 4 is an explanatory diagram of the operation of Fig. 2, 5 and 6 are explanatory diagrams of conventional products. ■...Bag, u6)...Bag making conveyor. aη...Vacuum packaging device, (18)...Rotor. 19)...table, (2υ...upper lid. shukui)...pin, shi■...bed. t26)...Hinge support, (27)...Pillow material. Citrus...Coro, (30)...Spindle. 1.31)...Pulley, (3 cars...Guidance. (36)...Seal bar, (40)...Rail.

Claims (1)

[Claims] A large number of tables are supported on a rotor at equal intervals, each table is transported by the rotor in a circular orbit, and each top cover, which is airtightly covered on the top surface of each of the tables, is transported integrally with each of the tables, and Each top lid is configured to open upward from the table within a predetermined range during one rotation of the rotor, and the top lid is arranged so that the tip of the bag making conveyor faces above the table passing area in the opening area of the top lid. , the bag containing the item to be packaged is fed onto the table by the bag-making conveyor so that the bag mouth is aligned with the pillow material provided on the table, and during one revolution of the rotor, the vacuum formed by the table and the top cover is removed. In an apparatus for vacuum packaging the items to be packaged in a box, the other end of each table is attached to the rotor via a pin so that the end of each table on the side provided with the pillow material swings upward. Each table is supported with the pin as an axis at a predetermined inclination below horizontal to the rotor, while a bed is placed on each of the tables, and each table is supported in the vertical direction of each table. The ends of the bed on the swing axis side of the table are each hinge-supported on the top surface of the table, and the upper end of a spindle, which vertically penetrates approximately the middle portion of each table and whose lower end is supported by a rotor, is engaged with the lower surface of the bed. A rotary vacuum packaging machine comprising: supporting each bed in a substantially horizontal state, a roller fixed to the underside of the pillow material of each table, and a rail disposed at a predetermined slope on the upper surface of the track of the roller.