JPS5933634Y2 - Bag-making machine sealing part separation device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealed part separating device for a bag making machine.

Generally, when manufacturing a shopping bag made of synthetic resin as shown in Figure 1, a long flat cylindrical body with both sides turned inward in a V-shape is folded to a predetermined length. At the same time, the front and rear parts of this cut part are sealed by heat fusion etc. to form a closed bag, and one end of this bag in the front and rear direction is extended over the tops of the V-shaped folded parts on both sides. It is cut out in a substantially U-shape to form a hand portion and an opening.

In this case, in order to facilitate product management of shopping bags as a product and to simplify the manufacturing process, bags are stacked in a predetermined number, for example, 50 bags or 100 bags, and then bundled together. However, when these bags are piled up and bundled, the sealed part is not cooled down immediately after being sealed by heat fusion, etc., so the lower part of the bag is The adhesive may adhere to the sealed parts of the body, causing a decrease in product value or the occurrence of defective products.

Furthermore, even in the case of bags that are sealed using an adhesive or the like instead of heat-sealing, a similar problem occurs because the adhesive that has protruded from the sealed portion has not dried.

The present invention was developed in view of these points, and when bags are piled up and bundled, an interposer is inserted between the sealed parts of the ends of each bag immediately after they are sealed, so that The purpose of this is to separate the sealed parts of the upper and lower bags to prevent the bags from adhering to each other.

Next, one embodiment of the present invention will be described based on the drawings.

In Fig. 2, reference numeral 1 denotes a long, flat cylindrical body made of thermoplastic synthetic resin, such as polyethylene. Although not shown, it is wound in a spiral shape and is pulled out from the outer end.

The cylindrical body 1 pulled out from the outer end is wound around guide rollers 2 and 3 provided above and below to remove slack, and then introduced into the quantitative transfer device 4.

This transfer device 4 has a pair of upper and lower large-diameter rollers 5 and a pair of small-diameter rollers 6 horizontally mounted in sequence in a direction perpendicular to the direction of transfer of the cylindrical body 1, and an endless belt between each of the upper and lower rollers 5 and 6. The cylindrical body 1 is sandwiched between the upper and lower belts 7 and is intermittently sent forward a predetermined length, that is, the length of the bag to be manufactured.

The cylindrical body 1 made of thermoplastic synthetic resin sent out by the quantitative transfer device 4 is guided to a sealing and cutting device 8 as a manufacturing device.

This sealing cutting device 8 is provided in front of the quantitative transfer device 4, and horizontally suspends a fixed receiver 9 below the cylindrical body 1 sent out by the transfer device 4 over the entire length in the width direction of the cylindrical body 1. At the same time, a movable body 10 facing the fixed receiver 9 is horizontally suspended above the cylindrical body 1 so as to be vertically movable, and a heat source is built inside the fixed receiver 9 and the movable body 10. Concave portions 11 and 12 facing each other are formed in the center of the opposing surfaces over the entire length of the cylindrical body 1 in the width direction, whereby heat-sealed portions 13 are spaced apart on both sides of each of the concave portions 11 and 12. The recess 12 of the movable body 10 is provided with a cutting blade 14 over the entire length.
It is formed by attaching it with its tip protruding from the recess 12.

When the cylindrical body 1 intermittently fed out by the quantitative transfer device 4 is stationary, the movable body 10 descends to the fixed receiver 9 via the cylindrical body 1, thereby causing the cylindrical body to The bag body B is cut into a predetermined length, and the front and rear parts of the cut portion are sealed by heat sealing, and then raised and returned to form a closed bag body B in sequence.

Further, at this time, the front end portion of the cylindrical body 1 protruding forward from the sealing/cutting device 8 is introduced into the bundling device 15 .

This bundling device 15 is provided close to the front of the sealing and cutting device 8, and as shown in FIG. On this base 16, a pair of cutting blades 17 with an H-shaped cross section are erected on both sides so that they can be moved in and out by an air cylinder 18, and a pressing body 2 has a recess 19 corresponding to the cutting blades 17 on the lower surface.
0 is horizontally suspended above the rear part of the bag body B formed from the cylindrical body 1 so as to be movable up and down, that is, to be movable forward and backward on the base 16, and the front part of the bag body B is supported in front of the base 16. A swing table 21 is mounted on a shaft at its rear end, and its tip is movable up and down between a horizontal state and a downwardly inclined state.

When the bag body B is formed by the sealing and cutting device 8, that is, when the cylindrical body 1 intermittently fed out by the quantitative transfer device 4 is stationary, the sealing and cutting device 8 is movable. The pressing body 20 advances and retreats from the base 16 via the cylindrical body 1 at the same time as the lowering movement of the movable body 10 of the body 10 or a little earlier than the lowering movement of the movable body 10 , so that the bag body B formed from the cylindrical body 1 is moved to a predetermined position. is inserted into a pair of cutting blades 17.

Then, due to the H-shaped cross-section of the cutting blade 17,
When the bag body B is inserted into the cutting blade 17, two opposing tongue pieces are formed at a predetermined part, and these tongue pieces engage with each other between the upper and lower bag bodies 8 so that the base is cut out. 16
A large number of bags B stacked on the swing table 21 are bundled in close contact with each other so as not to shift their positions.

Further, between the sealing cutting device 8 and the bundling device 15, a static electricity removing device 22 for removing static electricity from the cylindrical body 1 is provided above the cylindrical body 1, and the static electricity removing device 22 is provided above the cylindrical body 1, and The cylindrical body 1 corresponding to one bag body B sent out in front of the bag 8 is smoothly positioned at a predetermined position on the base 16 and the swing table 21 of the bundling device 15 without being wrinkled.

Further, an air guide 23 is provided in front of the static electricity removing device 22.

This air guide 23 is connected to the movable body 1 of the sealing and cutting device 8.
0 descends to form bag body B, and when it returns to the upward position, air is blown against the rear part of bag body B below to separate the sealed part of the rear part of bag body B from the heat-sealed part 13. act.

The sealed portion of the rear part of the bag B blown down by the air guide 23 immediately after being heat-sealed is guided to a cooling device 24 serving as a seal cutting device.

As shown in FIG. 4, this cooling device 24 is installed along a vertical plane opposite to both sides of the rear end of the bag body B which is blown down by a pair of circular rotating discs 25 on both sides as a rotating body. The bases of cooling plates 26 as a plurality of intervening members made of metal plates are pivotally supported on both sides of the rotary disk 25 on both sides, and the cooling plates 26 are mounted radially between the rotary disks 25. The cooling plate 26 is rotatable within a certain range in the same direction as the rotary plate 25, and a stopper 27 for the tip of the cooling plate 26 is provided behind the base 16 of the bundling device 15.

By rotating the rotary disks 25 on both sides clockwise in FIGS. 2 and 4, each cooling plate 26 sequentially rotates from left to right in the upper position and remains constant at the stopper 27. The rotary plate 25 is rotated clockwise so that the cooling plate 26 rotates in synchronization with the quantitative transfer device 4, and each cooling plate 26 is rotated clockwise.
sandwich the rear part of the bag body B, separate the sealed parts of the upper and lower bags B to prevent the bags B from adhering to each other, and cool the sealed parts between the respective cooling plates 26.

The cooling plate 26 is stopped by the stopper 27 for a certain period of time while several bags B are manufactured, thereby separating the sealed portion of the bag B and cooling it, and then being stopped by the stopper 27. The bag body B is untied and rotated downward to release the rear part of the bag body B.

Then, when the number of bags B bundled in the bundling device 15 reaches a predetermined number, for example, 50 or 100, while the rear sealing portion is cooled by the cooling device 24, the tip of the swing table is raised. As shown in FIG. It descends and comes out of the bundle of bag B.

At this time, since the opposing tongues formed on the bag body B by each cutting blade are engaged between the upper and lower bags 8, the cutting blade 1
Even after the bag 7 is removed, the upper and lower bags B of the bundle B are kept in close contact with each other so that their positions do not shift, and the bundle does not collapse.

The bundle of bags B is then introduced into the cutting device 29 by the clamping device 28 described above.

This cutting device 29 consists of a press pedestal 30 that supports the rear part of the bundle of bags B, and a press mold 31 that advances and retreats from above with respect to the press pedestal 30.
When the rear part of the bundle of bags B is conveyed to a predetermined position on the press pedestal 30, the press die 31 is lowered and the rear end of the bag B is cut by the cutting blades 17 as shown in FIG. It is cut into a substantially U-shape including the formed tongue portion, and a handle portion and an opening are formed in the closed bag body B, and the bag body B is completed as a shopping bag as shown in FIG.

Further, the bundle of bags B completed as a shopping bag is sequentially placed on a belt conveyor-like accumulation section 32 by the clamping device 28.

In addition, this example shows the case where it is applied to a bag-making machine that manufactures synthetic resin shopping bags by sealing them together by heat-sealing, but the invention is not limited to this, and other materials such as paper or paper and synthetic resin can be used. It may be applied to a bag-making machine that manufactures bags made of materials that combine It is not limited to a flat plate like the cooling plate in the example, but may also be one with an uneven surface, one with many through holes, a net-like one, a slat-like one, etc.

Further, as shown in FIG. 6, a rotating shaft 41 as a rotating body
may be horizontally mounted, and the interposer 42 may be attached to the rotary shaft 41.Furthermore, the interposer may be fixedly attached to the rotary disk 25 or the rotary shaft 41.

According to the present invention, when stacking and bundling bags, an interposer is inserted between the sealed parts of the ends of each bag immediately after sealing, so that the sealed parts of the upper and lower bags are separated. Since they are spaced apart, the bags do not adhere to each other, and it is possible to prevent a decrease in the commercial value of the bags and the occurrence of defective products.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a shopping bag showing an example of a bag, Fig. 2 is an explanatory diagram of a bag making machine to which the sealing part separation device of the bag making machine of the present invention is applied, and Fig. 3 is a bundling device thereof. 4 is a perspective view of the main parts thereof, FIG. 5 is a perspective view of a shopping bag manufactured by the bag making machine shown in FIG. 2, and FIG. 6 is a perspective view of the bag making machine of the present invention. FIG. 7 is a perspective view of another embodiment of the attachment part separating device. B... Bag body, 1... Cylindrical body, 8...
...Sealing and cutting device as bag making device, 15...
・Bundling device, 24...Cooling device as a sealing part separation device, 25...Rotary disk as a rotating body, 2
6...Cooling plate as an interpolator, 41...
・Rotating shaft as a rotating body, 42... Intermediate body.

Claims (4)

[Scope of utility model registration request] (1) A long flat cylindrical body is introduced into a bag making device from one end, and is sequentially cut into a predetermined length, and at least one of the front and rear sides of the cut portion is sealed to form a large number of bags. and stacks and bundles a large number of bags in a bundling device provided in front of the bag making device, wherein at least one of the front and rear sides of the bundling device is rotatable along a vertical plane. A rotating body is provided, a plurality of interposers are arranged radially on the rotating body, and by rotating the rotating body, the sealed portions of the bags sent to the bundling device are separated from each other. 1. A sealed part separating device for a bag making machine, characterized in that the device is positioned between interposers to separate the sealed parts of each bag body immediately after being sealed. (2) Utility model registration claim 1, characterized in that the rotating body is composed of a pair of opposing rotating disks, and the plurality of intervening bodies are installed between the rotating disks on both sides. A sealing part separation device for a bag making machine as described in 2. (3) The sealed part separating device for a bag making machine according to claim 1, wherein the rotating body is a rotating shaft. (4) Registration of a utility model characterized in that the plurality of intervening bodies are pivotally supported by the rotating body at their bases on the side of the rotation center of the rotating body, and are formed to be rotatable within a certain range in the same direction as the rotating body. A sealing part separating device for a bag making machine according to any one of claims 1 to 3.