JP2929092B2 - Method and apparatus for pleating tubular multilayer structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention is a method for manufacturing a bag
Both sides of the cylindrical multilayer body formed and provided in dimensions are folded inward, and when forming a bag with this cylindrical multilayer body, three sides are previously formed on both sides so that the body becomes three-dimensional. The present invention relates to a method of crimping a folded form and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, as a method and an apparatus for providing a fold that folds both sides of a bag into a three-dimensional shape so that the body of the bag has a three-dimensional shape, there is one disclosed in Japanese Patent Application Laid-Open No. 55-103946. Was.

In this method, as shown in FIGS. 7 and 8, a long material 10 is continuously fed so as to enclose a forming plate 11 having a substantially E-shaped cross section, and the overlapped portions are bonded and formed. Disc-shaped roller 1 from both sides of plate 11
2 and 13 are pressed so that the side surfaces thereof are folded into three folds.
The folds are formed by pressing with 4,15.

[0004] The long tubular body thus formed is cut at a desired location and the opening is closed to form a pleated bag of a desired length. .

[0005]

Since the above-mentioned conventional shirring method and apparatus are for continuously processing a long material, the apparatus is large-scale and requires a wide installation. There was a problem that an area was required. In addition, since the overlapped ends of the long material are adhered to each other and formed into a cylindrical shape and simultaneously pleated on both sides thereof, particularly in the case of a multilayer material using a slippery plastic film or sheet, the overlap is made. There has been a problem that the combined materials are liable to be displaced from each other or to cause a bonding failure at a joint portion, require high processing accuracy, and have a high possibility of causing defective products.

Furthermore, this device can only produce pleated bags, and cannot use existing materials provided in advance in the form of a tube for the production of bags so that both pleated and non-pleated bags can be handled. There were also problems.

An object of the present invention is to solve the problems of the above-mentioned conventional methods and apparatuses.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is directed to a cylindrical composite material which is provided in a predetermined size as a material for manufacturing a bag. A pair of plate-like plates inserted into the inside of the layered body and holding the tubular multilayer body in a tensioned state so that folds are formed on both sides thereof are respectively rotated around one side thereof, thereby forming a plate-shaped plate. After forming a new fold at a location corresponding to the width of the cylindrical multilayer body and thus forming two folds on both sides of the tubular multilayer body, the intermediate position of the two folds is pressed and held by a pressing piece from outside. Then, by rotating the plate-like plate or moving the plate-like plate toward and away from each other , the tubular multilayer body is held in tension again on the upper side of the pressing piece to form a three-fold form on both sides of the cylindrical multilayer body. Characterized by forming folds A pleating how to.

According to a second aspect of the present invention, there is provided a pleating apparatus used in the method according to the first aspect, wherein the pleating apparatus includes a fixed table, a vacuum transfer device provided near the fixed table, and a folding device arranged on the side of the stationary table, is constituted by a presser device disposed above the fixed table, the folding device comprises a fixed table and toward or away from, each other and perpendicular to the direction tangent
A plate-like plate is protruded toward the fixed table side on a pair of movable tables movable in a separating direction , and is rotatably mounted on one side as an axis. It is characterized in that a pair of pressing pieces having a substantially L-shape in a side view, which are arranged opposite to each other above the table, are driven to move up and down.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a simplified perspective view of a shirring device according to the present invention. As shown in the figure, the folding device has folding devices 2 and 2 on both sides thereof so as to sandwich the vertically long fixed table 1 and a holding device 3 on the fixed table 1. In addition, an elevating pallet 4 on which a tubular multilayer body 5 as a material of a bag is placed is disposed in front of the fixed table 1 (to the right in FIG. 1), and is disposed near the elevating pallet 4. A vacuum transport device (not shown) for adsorbing the cylindrical multilayer body 5 to one side and transporting it to the fixed table 1 is arranged.

The folding device 2 is mounted on a pair of movable tables 21 and 22 movable in directions parallel to and away from the fixed table 1 and in parallel with the fixed table 1, respectively.
Are rotatably mounted, and the plate-like plates 25 and 26 are provided to protrude toward the fixed table 1 side.

23 and 24 are plate-shaped plates 25 and 2 respectively.
6 is a driving device for rotating the piston rods 23b, 2
The cylinder devices 23a and 24a for driving the 4b out and in, the racks 23c and 24c connected to the ends of the piston rods 23b and 24b, and the pinions 23d and 24d meshed with the racks 23c and 24c, respectively.
The center axes 25a, 26a of the 24d are plate-shaped plates 25,2.
6 is connected to one side.

The holding device 3 is provided with a pair of pressing pieces 31 and 32 having a substantially L-shape in a side view, which are provided at predetermined distances on the left and right sides of the fixed table 1, respectively.
3, 34, and are driven up and down.

In FIG. 1, reference numeral 6 denotes a pressing roller provided on the fixed table 1.

The cylindrical multilayer body 5 placed on the elevating pallet 4 is formed of a multilayer structure in which paper, cloth, etc. are superposed on a plastic film or sheet, and is formed into a cylindrical shape. The bag manufactured from the tubular multilayer body 5 has characteristics such as strength, moisture resistance, water resistance, oil resistance, and chemical resistance.

The tubular multi-layered body pleating apparatus of the present invention has the above-described configuration.

In the illustrated example, a pair of movable tables 21 and 22 are provided on both sides of the fixed table 1 so as to sandwich it.
The plate-like plates 25 and 26 attached to the movable tables 21 and 22 respectively include the cylindrical multilayer body 5.
The movable tables 23 and 24 may be arranged on only one side of the fixed table 1 when the movable tables 23 and 24 have a sufficient length necessary for bending the.

Next, a description will be given of shirring by the method of the present invention using the shirring device having the above-mentioned structure. First, as shown by an arrow in FIG. One of the upper portions 5 is sucked by a vacuum transport device (not shown) and moved onto the fixed table 1. At this time, since the upper surface of the tubular multilayer body 5 is held by suction,
As shown in FIG. 2, the openings 5A on both sides are expanded.

In this state, when the movable tables 21 and 22 are moved toward the fixed table 1 by a driving device (not shown), the plate-like plate 2 attached to the movable tables 21 and 22 is moved.
5 and 26 enter the inside of the tubular multilayer body 5 from the opening 5A.

Next, when the adjacent movable tables 21 and 22 are driven in a direction to be separated from each other by a driving device (not shown), the tubular multilayer body 5 is expanded by the left and right plate-like plates 25 and 26 and is held in tension. . In this state, the cylinder device 23
When the racks 23c, 24c are driven in the same direction by actuating the racks 23c, 24c, the pinions 23d, 24d engaged with the racks 23c, 24c rotate, so that the left and right plate-like plates 25, 26 move the central shafts 25a, 26a. Rotating in the same direction as a fulcrum, the held cylindrical multilayer body 5 is rotated in the same direction by the width of the plate-like plates 25 and 26. As a result, as shown in FIG. 3, new folds 5c and 5d are formed on the cylindrical multilayer body 5 at positions separated from the original folds 5a and 5b by the width of the plate-like plates 25 and 26. Become.

In this state, the movable tables 21 and 22 are moved along the fixed table 1, and the
Is moved to a predetermined position below the presser device 3. Next, the cylinder device 33 is operated, and the pressing piece 31 on the rear side (the left side in the figure) is lowered as shown in FIG.
Is pressed and held. At this time, the tip of the pressing piece 31 is located at an intermediate position between the original fold 5a and the new fold 5c. Further, prior to the lowering of the pressing piece 31 or at the initial contact stage of the pressing piece 31, the movable table 21 is moved so as to pull out the plate 25 from below the pressing piece 31.

Next, the cylinder device 34 is operated, and FIG.
As shown in FIG. 5, the pressing piece 32 on the front side (right side in FIG. 5) is lowered, and the other side of the cylindrical multilayer body 5 is pressed and held in the same manner. At this time, the movable table 22 is moved in advance and the cylinder device 24a is operated to move the plate-like plate 26 below the pressing piece 32 so as not to hinder the lowering of the pressing piece 32, and rotate the tip thereof upward. Let it move.

In the state where both sides of the cylindrical multilayer body 5 are pressed by the pressing pieces 31 and 32 in this manner, the left and right plate-like plates 2 are pressed.
5 and 26 are returned to a horizontal position, and the respective plate-like plates 25 and
By driving the movable tables 21 and 22 to which the plate 26 is attached to move away, the plate-like plates 25 and 26 are moved to both sides of the tubular multilayer body 5 again above the pressing bodies 31 and 32. As a result, both sides of the cylindrical multilayer body 5 are folded into a three-fold form with the leading ends of the pressing pieces 31 and 32 as central folds 5e and 5f as shown in FIG. Is made.

After that, the upper side of the cylindrical multilayer body 5 may be pressed by the pressing roller 6, so that the above-mentioned pleating is more reliably performed.

By closing one opening 5A of the tubular multi-layered body 5 pleated as described above with appropriate means such as heat sealing or sewing, a bag having a three-dimensional body is formed. . Such a bag is provided with the other opening 5 serving as an input port.
Since A is held in an open state and is difficult to close, the contents can be easily and reliably filled by an automatic machine, and is suitably used for an automatic filling apparatus.

As described above, according to the method of the present invention, the outer folds of the tri-fold form are made by the movement and rotation of the plate-like plates 25 and 26 inserted inside the tubular multilayer body 5.
The center fold of the three-fold form is formed by pressing and holding predetermined outer positions of the cylindrical multilayer body 5 with the pressing pieces 31 and 32.

In the illustrated embodiment, the plate-like plates 25 and 26 are rotated using the cylinder devices 23a and 24a, the racks 23c and 24c, and the pinions 23d and 24d. Plate 2
The wheels 5 and 26 may be rotated by a predetermined angle at a predetermined timing with one side thereof as a fulcrum, and may be rotated by using another driving mechanism, for example, a motor and a link or a cam.

[0029]

As described above, the present invention according to claim 1 of the present invention uses a plate-shaped plate and a pressing piece to
The tri-folded pleating on both sides of the tubular multilayer body allows the use of existing materials provided for bag making. In addition, since each cylindrical multilayer body is individually processed, there is no fear that defective products are continuously generated as in the case of using a conventional long material. Furthermore, since this tubular multilayer body is formed in a predetermined shape in advance, even if a slippery plastic film or sheet is used for the inner layer, there is no danger that the stacked layers will shift during processing, A predetermined pleating is easily made.

The invention according to claim 2 provides a vacuum transport device, a folding device for rotating and moving the plate-like plate in a planar manner, and a holding device for driving the pressing piece up and down for bag production. Since the existing tubular multilayer body is to be pleated, the installation area is small and the introduction can be easily performed.

[Brief description of the drawings]

FIG. 1 is a simplified perspective view showing an embodiment of a tubular multi-layered body pleating apparatus according to the present invention.

FIG. 2 is a simplified explanatory view showing a state in which a plate-like plate is moved in a direction away from the inside of a tubular multilayer body.

FIG. 3 is a simplified explanatory view showing a state where a plate-like plate is rotated inside a cylindrical multilayer body.

FIG. 4 is a simplified explanatory view showing pressing and holding of one side of a cylindrical multilayer body.

FIG. 5 is a simplified explanatory view showing pressing and holding of the other side of the tubular multilayer body.

FIG. 6 is an explanatory diagram showing a state in which shirring by the method of the present invention is completed.

FIG. 7 is a simplified perspective view of a conventional pleating device.

FIG. 8 is a sectional view of a main part of the pleating apparatus shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed table 2 Folding device 3 Holding device 4 Elevating pallet 5 Cylindrical multilayer body 5A Opening 5a, 5b, 5c, 5d, 5e, 5f Fold 6 Press roller 21,22 Movable table 23,24 Drive 23a, 24a Cylinder Devices 23b, 24b Piston rods 23c, 24c Racks 23d, 24d Pinions 25, 26 Plate-like plates 25a, 26a Center axes 31, 32 Pressing pieces 33, 34 Cylinder device

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takashi Fujioka 1-3-1500 Umeda, Kita-ku, Osaka City 15th floor of 3rd Building in front of Osaka Station Inside Sico Corporation (72) Inventor Hirotoshi Maeda Kita-ku, Osaka-shi 1-3-1500 Umeda 1-3rd Floor, Osaka Station 3rd Building, 15th Floor Siko Corporation (56) References JP-A-2-6124 (JP, A) Japanese Utility Model Showa 53-110318 (JP, U) Akira Tokubo 42-19207 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) B31B 1/00-49/04

Claims (2)

(57) [Claims] 1. A cylindrical multi-layered body which is provided in a predetermined size as a material for manufacturing a bag and is provided, and the cylindrical multi-layered body is tensioned so that folds are formed on both sides thereof. By rotating the pair of held plate-shaped plates around one side thereof, a new fold is formed at a position corresponding to the width of the plate-shaped plate, and thus, on both sides of the cylindrical multilayer body. After each of the two folds is formed, the intermediate position of the two folds is pressed and held by a pressing piece from the outside, and the plate-shaped plate is rotated or moved toward or away from each other.
The cylindrical multilayer body is characterized in that, by moving the cylindrical multilayer body in the direction above, the cylindrical multilayer body is again held in tension on the upper side of the pressing piece to form a three-folded fold on both sides of the cylindrical multilayer body. How to crimp your body. 2. When the cylindrical multilayer body is formed into a bag on both sides of a cylindrical multilayer body which is provided in a predetermined size as a material for manufacturing a bag, the body has a three-dimensional shape. A pleating device for forming a fold in the form of three folds,
This pleating device is composed of a fixed table, a vacuum transfer device provided near the fixed table, a folding device provided on the side of the fixed table, and a holding device provided above the fixed table. A direction in which the folding device comes into contact with and separates from the fixed table ;
A plate-like plate is projected on the fixed table side on a pair of movable tables movable in directions perpendicular to and away from each other , and is rotatably mounted on one side as an axis. The holding device is configured to drive up and down a pair of substantially L-shaped pressing pieces, which are opposed to each other above a fixed table, in a side view, and are adapted to be driven up and down. .