JPS583883B2 - Product feeding device in horizontal pillow packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an article feeding device in a horizontal pillow packaging machine. The present invention relates to an article feeding device for feeding an article into a packaging film that is fold-molded.

In this type of packaging machine, the conveyor in the transport section has generally been an endless chain arranged in a horizontal transport path, with attachments for a suitable number of items arranged at suitable intervals (pitch). or,
A caterpillar or slat type conveyor is used, in which a large number of rectangular receiving plates are arranged adjacent to each other on a chain, and under the continuous operation of these conveyors, the goods are pushed by each attachment. It is designed to be placed between multiple receiving plates and transported forward.
On the other hand, in the bag-making department, the band-shaped packaging film is continuously fed out in time with the product feeding, and its both sides are folded downward to gradually form a cylindrical shape. , as illustrated in FIG. 7, between the conveyor 32 and the bag making machine 12, both side edges f,
A triangular space 35 necessarily occurs between the opening F' formed by f and the position where the attachment or receiving plate 33 of the conveyor 32 is reversed by the chain wheel 34 from forward to rearward.

For this reason, the item is exclusively larger than the space 35, and in the case of an item smaller than the space 35, a large number of long and short rubber belts 36 in the form of an endless string are used to close the space 35. They are arranged side by side and set to rotate in synchrony with each other, but such means requires a considerably high level of skill and is difficult, and because gaps are created between each rubber belt 36, it is particularly difficult to use for small and discrete items. Regarding this, it is not applicable in practice due to depression and digging, etc.
This was a major problem that called into question the performance and accuracy of the packaging machine itself.

In order to solve the above-mentioned conventional drawbacks, the present invention is made by newly developing a conveyor in the conveyance section and a technology for feeding the articles to the bag making section by the conveyor. The purpose is to feed small articles and even granular articles appropriately and quantitatively into a cylindrical film.

Hereinafter, the present invention will be explained based on illustrated embodiments.

However, the horizontal pillow packaging machine of this illustrated example differs from conventional packaging machines of this type in the article conveying section, but the other parts are basically the same and will be briefly described below.

That is, on the conveyance section side, a new conveyor 3 is installed within a support frame 2 extending horizontally from the main body 1.

This conveyor 3 includes a large-diameter main roller 4 on the main body 1 side, a medium-diameter follower roller 5 on the tip side of the support frame 2, and a bag making device 12 to be described later.
An endless flat belt 8 is hung between a small-diameter first roller 6 disposed on the inner lower side and a medium-diameter second roller 7 disposed on the lower side at the entrance of the bag making machine 12. The upper horizontal portion 8a of the flat belt 8 is located between a pair of guide rails 9, which are arranged in parallel in the longitudinal direction (left-right direction in the figure) on both sides of the upper surface of the support frame 2. A transport path 10 for goods is formed between the kings.

The right end in the figure, that is, the first and second rollers 6, 7
A front end portion 3a formed by a folded portion of the flat belt 8 in between is inserted downward into the interior of the bag making device 12 from the entrance portion thereof as shown in FIGS. 3 and 4.

Regarding this conveyor 3, the main roller 4 is connected to a variable motor via a chain train (both not shown), so that the speed can be continuously changed at an appropriately higher speed than the pulling/transfer speed of the packaging film, which will be described later. The first and second rollers 6 and 7 are both movable (position changeable), so that the position and length of the front end 3a relative to the bag making machine 12 can be changed. At the same time, the tension of the flat belt 8 is adjusted.

Note that the left end of the conveyance path 10 in the figure is used as an input section for items, and is connected to a weighing feeder or a feed conveyor (both not shown).
shall be installed.

By the way, as for the item, it is assumed that it is a ball-shaped, fixed amount confectionery W.

In the film feeding section above the main body 1, a roll body R of the film is detachably set on a frame body as is well known.
A band-shaped packaging film F that can be heat-welded is continuously drawn out via guide rollers 11, 11 and fed out toward the bag-making section below.

In the bag making section, a known bag making device 12 is set at the front end 3a of the conveyor 3.

As shown in FIGS. 3 to 5, this bag-making device 12 starts folding down both side edges f, f of the above-mentioned packaging film F at its entrance side, and gradually forms the film into a cylindrical shape while making each other into a cross-shaped shape. to become

Then, the welding margin f1 of the cylindrical film F1 is inserted into the guide groove 1.
The confectionery W conveyed from the conveyor 3 is wrapped in the cylindrical film F1 during this process.

In the article encasing and transfer section in front of the bag making section (right side in FIGS. 1 and 2), a pair of left and right belt-like strips extend from the lower surface of the delivery frame 12a of the bag making device 12 to the center of the main body 1. The guide plates 14, 14 are laid horizontally to each other, and the opposing inner edges of the drawing plates 14, 14 are aligned with the guide groove 1 of the bag making device 12.
A guide groove 15 is formed which is aligned with 3.

The entrance side of the lower surface of both guide plates 14, 14 (the bag making device 12
A known film delivery device 16 is provided below the delivery frame 12a, and a welding device 18 is provided on the exit side.

Regarding the feeding device 16, a cylindrical film F1 is suspended from the guide groove 15 between the outer peripheral surfaces of a pair of left and right rubber rollers 17, 17 connected to each other via a gear or the like.
The film is conveyed from the conveyor 3 at an appropriately low speed while holding the welding margin f1 of the film.

Further, regarding the welding device 18, a pair of left and right metal seal rollers 19 with a built-in heater are connected to each other.
The welding margin f1 is continuously welded between the outer circumferential surfaces of the welding parts 19 and 19 while being held and delivered.

In addition, in both the above-mentioned devices 16 and 18, one of the rollers 1
7 and 19 are on the driving side and are set to rotate in synchronization with each other.

In front of the guide body 14, a known sealing device 20 for sealing and packaging items is installed, which includes a pair of upper and lower rotary welding and cutting mechanisms 21 and 22.

For each mechanism 21, 22, a heated welding body 24, 24 with a built-in heater is disposed along the upper and lower rotating shafts 23, 23, which are horizontally suspended in a direction intersecting the film transport direction and are rotationally connected to each other. A knife 25 and a knife receiver 26 are detachably attached in each weld body 24, 24.
is inserted.

Both mechanisms 21 and 22 are set to rotate at the same unequal angular velocity, with the lower side in FIG. 1 being driven and the upper side being driven. By rotating once in synchronization, welding by both heating welding bodies 24, 24, knife 25 and knife receiver 2
6, a pillow bag F2 of a predetermined length (pitch) is formed, and the confectionery W is sealed and packaged as a packaged product.

Note that 27 indicates a delivery device for packaged products.

Reference numeral 28 denotes a film presser guide device installed from the bag making machine 12 side to the sealing device 20 side, and each chain wheel 29, 2
Presser rods 31, 31 are connected and arranged between two rows of chains 30, 30 on both sides, which are hung between the two chains 30, 30, in accordance with the length of the pillow bag.

In the above-mentioned packaging machine of this embodiment, a fixed amount of confectionery W is fed into the conveyor 3 from the weighing feeder side under the continuous movement of the conveyor 3 and the continuous feeding of the packaging film F as each part of the machine is operated. Then, the confectionery W is transported forward within the conveyance path 10 in a thin, two-dimensional, dispersed state over a wide range on the upper horizontal portion 8a of the flat belt 8 in accordance with the amount and conveyor speed.

At the same time, the band-shaped packaging film F fed out from the feeding section is folded into a cylindrical shape by the bag making device 12 as described above.

In feeding the confectionery W and film F, the confectionery W is fed from inside the opening F' of the folding start part of the packaging film F on the entrance side of the bag making device 12 as shown in FIGS. 3 and 4. While being fed, the film reaches the front end 3a of the conveyor 3, and is discharged from the front end 3a into the cylindrical film F1 in the bag making device 12.

Due to the difference in speed between the conveyor 3 and the film F, the confectionery W that has been thrown out is not rapidly fed and is temporarily piled up in a mountain shape at the front part of the front end 3a as shown in the figure. , they are three-dimensionally gathered in a much smaller area than the wide planar dispersion state on the conveyor 3, and are fed forward together with the cylindrical film F1 in this state.

In the process of feeding both W and F1, the welding margin f1 of the cylindrical film F1 is welded and center-sealed by the welding device 18, and then the front and rear portions of the confectionery W in this film f1 are sealed by the sealing device. At 20, the confectionery W is welded and cut into one pillow bag F2, and the confectionery W is sealed in the pillow bag F2 in a mountain shape and sent out as a packaged product.

Therefore, if we compare the packaged product manufactured by the packaging machine of this example as described above with the packaged product in which the confectionery W is packaged in a thin, widely dispersed state, the latter packaged product will have the following characteristics: Pillow bag F where candy W is too big and long
In contrast, in the packaged product of this example, the confectionery W is well enclosed in the pillow bag F2 of an appropriate size according to its quantity and condition without waste.

Note that such bagging in this example is not limited to small confectionery items, but can be similarly performed for a wide range of items, such as granular confectionery, tablets, and even mechanical parts.

In addition, in order to make it easier to collect such bulky items in a smaller area, on the bottom of the bag making machine 12,
An article receiving portion may be recessed to an appropriate depth (shallower is preferable) in an appropriate front portion of the front end 3a of the conveyor 3.

As described above, in the article feeding device of the horizontal pillow packaging machine of the present invention, the conveyor of the article conveying section is a belt type that is continuously operated, and the front end of the conveyor is extended inward along the lower surface of the bag making machine. , the front end closes the folding opening of the packaging film to be folded in the bag making machine and is inserted into the entrance of the cylindrical film. To accurately feed and discharge small loose articles and even granular articles into a cylindrical film without any spillage without any technical means for arranging a large number of rubber belts.

In addition to feeding such items, the above-mentioned conveyor is continuously operated at an appropriate high speed compared to the film feeding speed, so that the above-mentioned items are moved in the conveying direction on the conveyor. Even if the cylindrical film is conveyed in a dispersed state over a wide area, it can be collected in a small mountain shape at the dispensing part within the cylindrical film, and in this state it is fed together with the cylindrical film, and then sealed into a pillow bag of the required size by a sealing device. According to this method, for the above-mentioned items, when feeding them to the conveyor, it is only necessary to feed each bag at the same time, and the items are placed in a pile in advance. It is possible to eliminate the need for any means for putting the materials in bulk or techniques for gathering them during transportation.

In addition, the product can be sealed and packaged in a pillow bag with the minimum necessary amount of film commensurate with the actual storage capacity of the product, so that waste of film can be eliminated and a packaged product without loss of quality can be manufactured.

In particular, in the device of the present invention, the front end of the belt conveyor is formed in a series by folding a part of the upper horizontal portion of the belt around a small diameter roller in a bag making device, so that the construction is extremely simple. In addition, there is no speed deviation between the belt and the front end, making it possible to feed small bulk articles stably.

Moreover, the front end extends in the feeding direction along the lower surface of the bag making machine, and its terminal end is set at a position where the film is folded into a cylindrical shape, in other words, from a position where both side edges of the film are overlapped. By positioning the product at the front, no matter how small the product is, it can be reliably fed into the cylindrical film, and even if powder is generated from the product, the product, including the powder, can be fed into the cylindrical film. can be fed into the air, eliminating powder scattering and contamination.

In addition, since the head difference between the conveyance surface by the front end and the bottom surface of the bag making device can be made as small as possible, it is possible to eliminate cracking and dispersion due to falling of small quantities of bulk articles that are difficult to maintain in a gathered state, and to The film can be stably fed in the form of a group and properly fed into the cylindrical film.

In addition, since the product feeding speed can be changed independently from the film feeding speed, it is possible to arbitrarily select the interval at which a certain amount of product is filled into the cylindrical film. Various types of packaging such as tight packaging and rough packaging are possible, and packaging efficiency and versatility can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic side view of the packaging machine of this embodiment, Fig. 2 is a schematic plan view, and Fig. 3 is a schematic side view of the packaging machine of the present invention.
FIG. 4 is a side sectional view and a plan sectional view, respectively, illustrating the feeding state of the article from the conveyor into the bag making machine, and FIGS. 5 and 6 are respectively the lines ■-■ in FIG. FIG. 7, which is a cross-sectional view taken along line 1--2, is an explanatory diagram illustrating, in plan, an article feeding portion between a conveyor and a bag making device in a conventional packaging machine. 1... Main body, 2... Support frame, 3...
...Conveyor, 3a...Front end, 8...
...Flat belt, 8a... Upper horizontal part, 9
...Guide rail, 10 ...Transportation path, 1
2... Bag making machine, 14... Guide body, 16
...... feeding device, 18...... welding device,
20... Sealing device, 27... Delivery device, F... Packaging film, F1... Tubular film, F2... Pillow bag. , W...
Sweets, F'...Opening.

Claims (1)

[Scope of Claims] 1. In a horizontal pillow packaging machine that feeds small articles and seals a series of strip films into a tube shape and then into a bag shape to package the bulk articles, A belt conveyor is installed in front of the bag-making machine that forms the film into a bag-making machine, and is equipped with a belt conveyor that continuously feeds bulk items in quantitative units toward the bag-making machine. The upper horizontal part of the belt conveyor and the guide members on both sides form a conveyance path for bulk goods, while the conveyor path for bulk goods formed at the front end of the belt conveyor is set to be variable speed at a high speed. For the front end part for guiding small articles, a part of the upper horizontal part of the belt conveyor is folded over a small diameter roller in a bag making machine to form a series. It extends horizontally in the feeding direction along the lower surface inside the bag making device. The terminal end of the front end portion is located in the feeding direction from the position where the film is formed into a cylindrical shape. An article feeding device characterized by being set to the following conditions.