JPH0133441Y2 - - Google Patents

Description

[Detailed description of the invention] <<Field of industrial application>> The present invention relates to a gusset forming device in an automatic packaging machine that packages a predetermined number of thin plate-like products such as senbei, biscuits, etc. in a standing state. It is. 《Prior Art》 Conventionally, a predetermined number of thin plate-like products such as senbei, biscuits, etc. are placed in an upright position, and a continuous band of packaging material such as plastic film is formed into a cylindrical bag while the inside of the product is made into a standing state. An automatic packaging device for thin plate-like products is disclosed in Japanese Utility Model Publication No. 49-8684 and Japanese Unexamined Patent Application Publication No. 1986-8684. Publication No. 50-130592, Publication No. 53-32857
It is publicly known as in the publication No. In order to prevent the thin plate-like product from losing its upright state inside the cylindrical body after packaging, and to make the packaging beautiful, gussets are formed on both sides of the front and rear ends of the package to seal the product. It is desirable to do so. Therefore, there is a conventional gusset forming device as shown in Japanese Patent Publication No. 54-35824. In other words, inside the cylindrical body made of packaging material,
Items are stored at predetermined intervals and transported in that state. During the transfer, a gusset is formed by pressing the gusset forming claws inward at approximately the vertical center of both sides of the cylindrical body (the space created between the front and rear items, which will be end-sealed later). I'm starting to do that. <<Problems to be solved by the invention>> However, the above-described conventional apparatus has the following problems. That is, in the conventional device, the gusset forming claw suddenly enters the center of the cylindrical body, making the insertion position of the gusset forming claw into the cylindrical body unstable, making it impossible to form a gusset accurately. If the gusset forming claw gets into a vertically misaligned position, not only will it not be possible to form a clean gusset, but more pressing force than necessary will be applied to the item, causing the item to become senbei, biscuits, etc. as in the present application. In the case of a thin plate-like article, there is a risk that the article will be damaged by the above-mentioned pressing force. In particular, when the gusset forming claws come into contact with each other, it is a space where no goods are stored, so the packaging material tends to be relatively loose and sagging, making it difficult for the gusset forming claws to enter the desired position. Even so, the problem is that the packaging material is relatively likely to move vertically as the gusset-forming claws enter at the beginning of entry (when the stress on the packaging material is small), and as a result, the above-mentioned problems are more likely to appear. be. The present invention was devised in view of the above-mentioned problems, and its purpose is to form a gusset accurately and to stand up a group of thin plate articles by pre-forming the gusset while also preventing the group of thin plate articles from falling over. To provide a gusset forming device for an automatic packaging device for thin plate-like products, which can perform packaging without losing its condition. <<Means for Solving the Problems>> In order to achieve the above-mentioned object, the gusset forming device in the automatic packaging device for thin plate-like products according to the present invention uses a bag making method that continuously forms a band-like packaging material into a cylindrical shape. a container, an article transfer device located in front of the bag making machine and feeding a predetermined number of articles into a cylindrical body formed into a cylindrical shape by the bag making machine at regular intervals; In an automatic packaging device comprising a seal cutting device that seal-cuts the packaging material between the predetermined number of thin plate-shaped product groups in the horizontal direction from above and below at a predetermined rear position of the bag container, the tube between the bag making device and the seal cut device is provided. A pair of endless chains that move at the same speed as the transfer speed of the cylindrical body are installed along both sides of the cylindrical body, and at each predetermined pitch of the endless chain, the area near the upper edge of both sides of the space of the cylindrical body and The vicinity of the lower edge is narrowed inward from the side to perform preliminary gusseting, and an article clamping claw is provided for clamping the front and rear parts of each group of thin plate-shaped articles, and the cylindrical body is transferred in the seal cutting device section. A gusset that protrudes from both sides toward the center in synchronization with the speed and bends further inward at a substantially central position in the vertical direction of the narrowed portion of the packaging material formed by the article gripping claws to form a gusset portion. Formed nails were placed. <<Operation>> Items are transported while being inserted into the cylindrical body at regular intervals. At this time, spaces are defined before and after each group of items at regular intervals. Then, the upper and lower edges of the side surfaces of the space are narrowed and held from both sides by the item holding claws. As a result, the article gripping claws press the front and rear portions of the article, and the packaging material bends the article to form a preliminary gusset. Next, in this state, the approximately central portion of the space in the vertical direction is further bent from both sides toward the center using the gusset forming claws to form a gusset. At this time, since preliminary gusseting is performed in advance, gusseting can be smoothly and accurately formed. <<Example>> Figures 1 to 6 show an example of the present invention. A is a bag making machine that continuously forms a band-shaped packaging material F into a cylindrical shape. Reference numeral B denotes an article transfer device, which is located in front of the bag making machine A and inserts the articles a at regular intervals into a cylindrical body F ' formed into a cylindrical shape by the bag making machine A. It consists of a claw b attached to an endless chain c.
d is a sprocket, e is a table, and f is a pawl passage groove. C is a well-known seal cut device which cuts the packaging material F between the product group a fed into the cylindrical body F' from above and below in a lateral direction at a predetermined position at the rear of the bag making device A. This is for seal cutting in the right angle direction. D is a well-known center sealer, which serves to integrally seal the overlapping portions of both ends of the cylindrical body F' and to feed the film. In the figure, reference numeral 9 is a conveyor for discharging packaged products, 10 is a packaged product, 11 is a gusset portion, 12 is a sealing portion, 1
3 is a machine frame, and 14 is a rotation transmission gear. Here, in the present invention, first, between the bag making machine A and the seal cut device C , a pair of endless belts are moved along both sides of the cylindrical body F' at the same speed as the transport speed of the cylindrical body F'. Stretch chains 1 and 1 . And that endless chain 1 , 1
As shown in the first diagram, the distance p between the product group a and the product group a is
At a pitch p' that is approximately equal to , the vicinity of the upper and lower edges of both sides of the cylindrical body F' are narrowed from the side toward the inside, and the front and rear of each item a at each of the predetermined intervals is covered with packaging material. Item gripping claws 2 , 2 are attached to grip the item from above. The article holding claws 2 , 2 have the role of holding each article a and holding it as a preliminary gusset for the cylindrical body F'. Reference numerals 3 and 3 designate cushion members attached to the endless chains 1 and 1 so as to press both sides of the item a from above the packaging material F between the item holding claws 2 and 2 as necessary. Note that the item holding claws 2 , 2 may be provided on a single plate 4 as shown in FIG. 5 and attached to the endless chains 1 , 1 . 5, 5 is a sprocket. E is the cylindrical body in the seal cutting device C section.
It is a gusset forming device located on both the left and right sides of F', and is a cylindrical body as shown in the first figure.
Two-pronged gusset forming claws 8, 8 are attached to plates 7, 7 eccentrically attached to horizontal rotating gears 6, 6 driven in synchronization with the transfer speed of F'. The gusset forming claws 8, 8 are located approximately in the middle of the upper and lower article gripping claws 2 , 2 in the vertical direction;
That is, it is arranged approximately at the vertical center of the side surface of the cylindrical body F'. Further, a horizontal seal cutter head C' is inserted into the bifurcated portion of the gusset forming claws 8, 8. The gusset forming pawl described in the above embodiments is not limited to this, and may be of the conventionally well-known single pawl type that simply advances and retreats horizontally. To explain the operation of the above-mentioned embodiment, first, the packaging material F, which is formed into a cylindrical shape by the bag making machine A , is integrally sealed at both end edge overlapping parts by a center sealer D to form a cylindrical body F', and the center It is pulled out to the seal cutting device C side by the sealer D. At this time, a group of items a is fed into the cylindrical body F' at regular intervals by the item transfer device B , and a space is defined before and behind each group of items a at each regular interval. ing. The upper and lower edges on both sides of the space of the cylindrical body F' are moved inward from the sides by the item holding claws 2 , 2 of the endless chains 1 , 1 disposed along both sides of the cylindrical body F'. is urged toward. As a result, the space is narrowed and held. Then, the tip of the article clamping claw 2 is positioned inward from the side edge of the article a, and as a result, the article clamping claw 2 clamps the front and rear parts of each article a at predetermined intervals from above the packaging material F. It turns out. At the same time, as described above, the article clamping claws 2 push the side surfaces of the space of the cylindrical body F' inward, so that the side surfaces become taut (the preliminary gusseting is completed). Then, in this state, it is transferred to the seal cut device C side, and in the seal cut device C section, the approximately central portion of the narrowed portion in the vertical direction is further bent from both sides toward the center by the gusset forming claws 8, 8. After that, the seal cutting device C performs a seal cut in the horizontal direction from above and below between the product groups a to form a packaged product 10 with a gusset. When the final gusset is formed, the narrowed part (the space of the cylindrical body F') is brought into focus by the article holding claws 2 , 2 , as described above, so the gusset forming claws The tip of the gusset forming claw 8 can always accurately abut approximately the center in the vertical direction of the narrowed part, and since an appropriate amount of stress is generated in the narrowed part, the packaging material will not move relative to the other part during the folding operation of the gusset forming claw 8. It is possible to reliably form a clean gusset without shifting vertically. <<Effect>> As described above, in the gusset forming device of the automatic packaging device for thin plate-like products according to the present invention, the rearmost and leadingmost products of each group of products fed into the cylindrical body at regular intervals fall over. It is possible to transfer the product to the seal cutting device side while reliably preventing the product from being damaged, and also to pre-form a gusset on the packaging material between the product groups by the product clamping claws during the transfer, i.e., to keep the product constant at all times. By forming the side surface of the film and transferring it to the gusset section, the gusset can be sufficiently and reliably formed at the seal cut section.

[Brief explanation of the drawing]

Fig. 1 is a plan view of one embodiment of the present invention, Fig. 2 is a side view of the same without the gusset forming device, and Fig. 3 is a plan view of an embodiment of the present invention.
The figure is a vertical sectional view showing an example of the state in which an item is held by the item holding claws, FIG. 4 is a plan view showing an example of a case where a cushion member for holding down an item is attached between the item holding claws, and FIG. FIG. 6 is a vertical cross-sectional view showing an example of a case in which the claws are attached to one plate, and FIG. 6 is a vertical cross-sectional view showing an example of the gusset forming device. A ...Bag making machine, B ...Goods transfer device, C ...Seal cutting device, D ...Center sealer, E ...
... Gazette forming device, F ... Packaging material, F' ... Cylindrical body, 1 , 1 ... Endless chain, 2 , 2 ...
Item clamping claw, 8, 8... Gazette forming claw, a...
goods.

Claims (1)

[Scope of utility model registration request] A bag-making device that continuously forms a strip-shaped packaging material into a cylindrical shape; and a bag-making device located in front of the bag-making device, in which a predetermined number of items are placed in a cylindrical body formed into a cylindrical shape by the bag-making device. an article transfer device that sends goods at regular intervals;
In an automatic packaging device comprising a seal cutting device for seal-cutting the packaging material between the predetermined number of thin plate-shaped product groups from above and below in a lateral direction at a predetermined rear position of the bag making device, A pair of endless chains moving at the same speed as the transfer speed of the cylindrical body are stretched along both sides of the cylindrical body, and the upper edges of both sides of the space of the cylindrical body are arranged at predetermined pitches of the endless chains. An article clamping claw is provided for clamping the front and rear of each thin plate-like article group while performing preliminary gusseting by narrowing the vicinity and the vicinity of the lower edge from the side toward the inside. protrudes from both sides toward the center in synchronization with the transfer speed of the product, and bends the substantially central position in the vertical direction of the narrowed part of the packaging material formed by the article gripping claws further inward to form a gusset part. A gusset forming device for an automatic packaging device for thin plate-like products, which is provided with a gusset forming claw.