JPH0255286B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a film bag making device that can be placed in a packaging box and an opening opening device for the bag making device, which can be used to make a tube-shaped film bag and to securely secure the opening. The present invention is characterized in that it can be expanded to facilitate the storage of packaged articles, and that it has enabled automation of film packaging and subsequent cardboard case packaging.

[Conventional technology]

BACKGROUND ART Conventionally, electrical products such as televisions and other products are first wrapped in film prior to being filled into cardboard cases for dustproofing, moistureproofing, and protection.

A plastic bag is used for the film packaging.

Conventionally, as this type of device, for example, JP-A-53-
The invention described in Publication No. 17491 or Jikkosho
A device described in Japanese Patent No. 46-9830 has been proposed.

The above-mentioned film bag making and opening expanding device in the conventional invention projects a tube-shaped film from between conveyors that supply packing cases, and expands the bag by adsorbing parts from both sides of the projecting part. . In addition, the film bag making device and its opening expanding device in the above invention include inserting a packaging bag making tool having an elastic plate, an elastic wire, etc. inside a tube-shaped film and expanding the packaging bag making tool. The part is raised to a chute and a bag holding cam part provided at the top.

[Problem to be solved by the invention]

In the above-mentioned conventional invention, it is necessary to supply the tubular film with the protruding part standing vertically.
If a tubular film with too much flexibility is used, the protrusion will collapse and cannot be suctioned by the pad, making it difficult to make a bag and expand its opening.

In addition, in the above-mentioned conventional device, in order to move up and down the packaging bag making tool having an elastic plate, elastic wire, etc., a vertical movement device is required, which makes the structure complicated and expensive, and the above-mentioned vertical movement Care must be taken to prevent the tube-shaped film from slipping down inside. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an opening expanding device in which the expanded opening end of the tube-shaped film is always supplied to a fixed position and is securely gripped by a chucking rod. Furthermore, it is an object of the present invention to make the device as simple as possible.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has a supply roll that clamps a flat tube-shaped film and supplies it upward, and a parallel free roller that is placed on each of the supply rolls below and a parallel free roller that is always placed above it. A core is provided which has a leaf spring whose upper end expands and is located inside the tubular film, and the tubular film is disposed between the leaf spring and the core on the outside of each leaf spring of the core. A belt conveyor is provided that can open and close the upper part of the conveyor belt, and above the belt conveyor, a heat seal bar and a cutter are provided which extend into and return from both sides of the tube-shaped film passage. Film chucking rods are provided at four upper locations, and the film chucking rods are vertically movable and their intervals can be adjusted, and a packaged article supply section is constructed between the film chucking rods.

[Effect]

In the present invention, the tube-shaped film a supplied by the supply rolls 2 and 2a is initially set in such a state that it envelops the core X (see FIG. 2A).

Next, when the supply rolls 2, 2a and the lower pulleys 9, 9a of the belt conveyors 8, 8a are driven, the tube-shaped film a is fed out in a spread state by the leaf springs 4, 4a (see Fig. 2). reference).

Next, the chucking rods 1, 1a and 1b, 1c are lowered from above, grip the open end of the tubular film a, and return to the upper position. The drive of 8, 8a is stopped,
The upper parts of the belt conveyors 8 and 8a are closed, and the heat seal bar 4 and cutter 13 advance into the passage of the tube-shaped film a, and the slightly lower part thereof is cut together with the heat seal, forming a bag a' (Fig. 2). (see b).

Next, the intervals between the chucking rods 1, a, 1b, 1c are adjusted, and the chucking rods 1, 1a, 1b,
For example, a packaged article d such as a television set held by a suction cup 16 or the like is supplied from a packaged article supply section configured between 1c and into a cardboard case e that has been previously supplied to a fixed position by a roller conveyor 15. At the same time as the bag a' gripped by the chucking rods 1, 1a, 1b, and 1c, the article to be packaged d is lowered and stored.

After that, the chucking rods 1, 1a, 1b, 1c
is released from the bag a' and returned upward, and the article to be packaged d is released from the suction cup 16 etc. and returned upward, and then the cardboard case e is sent to a known lid flap folding device (not shown) and the lid is folded. The parts are completely sealed.

In the above-mentioned packaging process, in the present invention, belt conveyors 8, 8a are provided on the outside of the leaf springs 4, 4a, which sandwich a tube-shaped film between the leaf springs 4, 4a, and whose upper part can be freely opened and closed. There is.

Therefore, the open end of the tubular film a is always supplied to the fixed position, and the chucking rods 1, 1
a, 1b, and 1c.

〔Example〕

One embodiment will be described in detail below with reference to the drawings.

As shown in FIG. 4A, the present invention supplies a flat tube-shaped film a from below to the top, opens the upper part, and grips the upper opening with chucking rods 1, 1a, 1b, and 1c as shown in FIG. 4B. , the lower end is heat-sealed b and cut c to form a bag a', and the opening is adjusted using the above-mentioned chucking rods 1, 1a, 1b, 1.
Film bag making and its opening enlargement in an apparatus in which the packaged article d, such as a television set, is lowered into the opening as shown in c in the same figure, and then filled into the cardboard case e along with the bag a' as shown in d in the same figure. This relates to an opening device.

The details are shown in FIGS. 2 and 3.

First, a parallel flat tube-shaped film a
supply rolls 2, 2a are provided.

The supply rolls 2 and 2a are relatively long in order to supply a flat tube-shaped film a that can sufficiently accommodate the article d to be packaged.

Further, although not shown, the flat tube-shaped film a is wound on a reel in advance, and is fed upward while being held between the supply rolls 2 and 2a.

Above the supply rolls 2, 2a, there are free rollers 3, 3a placed on the respective supply rolls 2 and 2a below, and above there are leaf springs 4, 4a whose upper ends are constantly expanded. A child X is provided. Here, the core X means that the entire core is placed inside the tube-shaped film a. Details of the core X are shown in FIG. In the figure, free rollers 3 and 3a are provided in two stages and at alternate positions, but it is not necessary to provide them in two stages.
Moreover, it is not necessary to use alternate positions.

However, stability can be obtained by providing two stages. That is, since the core X is entirely placed inside the tube-shaped film a, it cannot be directly supported from the outside, and the lower part is supported by the supply rolls 2 and 2a, and the upper part is supported by the belt described later. Lower pulley 9 of conveyor 8, 8a,
9a, and if it is further increased, the regulating effect of the core X may not be sufficient.

In the figure, reference numeral 5 denotes a support plate that integrally supports both ends of the support shafts 6, 6a of the free rollers 3, 3a.
Further, the leaf springs 4, 4a do not need to be provided entirely above the support shafts 6, 6a, but may be provided only partially. 7,
7a is the chucking rod 1, 1a, 1b which will be described later.
and a notch provided at the lowered position of 1c.

Next, on the outside of each leaf spring 4, 4a,
Belt conveyors 8, 8a are provided which sandwich the tube-shaped film a between themselves and the leaf springs 4, 4a, and which can be opened and closed from above.

To explain in detail, belt conveyors 8, 8a
The lower pulleys 9, 9a constituting the core X are in contact with the upper part of the free rollers 3, 3a of the core X to prevent the free rollers 3, 3a from falling sideways and lifting up. 10a is rotatably supported at a fixed position on the side of a frame (not shown), while upper pulleys 11, 11a constituting the belt conveyors 8, 8a are supported by their central axes 12, 1
2a so as to be rotatable, and furthermore, the central axis 12,
12a itself is constructed such that its upper part opens and closes symmetrically, as shown in FIG. 2A and FIG. They are the upper pulleys 11,1
This is carried out by controlling the supply rolls 12, 12a of 1a with an air cylinder or the like.

Next, above them is a tube-shaped film a.
Heat seal bar 14 that advances and returns to the passage of
A saw blade-like cutter 13 is provided.

They are heat seal bar 14 and cutter 13.
It is provided slightly above the cutter 13 and is configured to immediately advance from the cutter 13 to sandwich and heat-seal the tube-shaped film a while cutting the lower part thereof with the saw-blade-shaped cutter 13.

Further, above the expanded position of the leaf springs 4, 4a, the above-mentioned chucking rods 1, 1a, 1b, and 1c, which are movable vertically and horizontally, are provided.

First, the chucking rods 1, 1a, 1b and 1c
Regarding the vertical movement of the motor, it is achieved by constructing a rack (not shown) in the air cylinder or the chucking rods 1, 1a, 1b and 1c, and meshing the rack with a pinion (not shown) provided on the frame side. For lateral movement, the air cylinder or the rack and pinion parts are supported as one slider on a frame side rail (not shown) via rollers, and configured so that they can be slid symmetrically using an air cylinder or the like. It will be done. A supply section for the article to be packaged d is constructed between the chucking rods 1, 1a, 1b and 1c which are movable vertically and horizontally.

As shown in the first figure, the present invention having the above-mentioned structure is provided approximately at the center of the roller conveyor 15 that transports the cardboard cases e.

〔Effect of the invention〕

According to the present invention, it is possible to automatically expand a plastic bag and its opening, and it is possible to easily and easily automate film packaging and subsequent cardboard case packaging.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is an installation state diagram of the device of the present invention, Fig. 2 is a, b, and b.
3 is a partially omitted perspective view of the core, and FIGS. 4A, 4B, and 4C are perspective views showing the packaging process. 1, 1a, 1b, 1c...chatting rod,
2, 2a... Supply roll, 3, 3a... Free roller, 4, 4a... Leaf spring, 8, 8a... Belt conveyor, 9, 9a... Lower pulley, 1
1, 11a...Upper pulley, 13...Cutter, 14...Heat seal bar.

Claims (1)

[Claims] 1. On the supply rolls that sandwich and feed the flat tube-shaped film upward, there is a parallel free roller placed on each of the supply rolls below, and a leaf spring whose upper end is constantly expanded above. A core is provided inside the tube-shaped film, and the tube-shaped film is sandwiched between the core and the plate springs on the outside of each of the leaf springs, so that the tube-shaped film can be opened and closed from above. A belt conveyor is provided, and above them there are heat seal bars and cutters that advance into and return from both sides to the tube-shaped film path, and four locations above the expanded positions of both leaf springs are provided with vertical movement and interval adjustment controls. 1. A device for making bags in a packaging station and for expanding an opening thereof, characterized in that a flexible film chucking rod is provided, and a packaged article supply section is constructed between the film chucking rods.