JPH0272011A - Device for winding film in film wrapping - Google Patents

Abstract

PURPOSE:To enable rapid operation by improving operativity by a method wherein while a film is wound out from a roll along an outer face of a circular roll group, the film is taken out from the inner edge of the wound film layer and wound around a product by a winding roller. CONSTITUTION:A tension applying device 6 consisting of two rotary bodies 6a, 6b under receiving rolls 12, 12 is provided in order to stretch a film in advance appropriately in accordance with use of a stretch film having good stretchability and obtain adhesion with a product. A film 5 wound around a roll 4 is supplied onto a guide roll 13 from one of the receiving rolls 12 via both rotary bodies 6a, 6b, and wound along the outer face of each supporting roll 2 of a circular body 1 via a dancer roll 14. After the above process, the film 5 is wound around a product (a) on an operation table (b) via a winding roll 3. The film 5 drawn from the roll 4 by swinging of the circular body 1 is stored on the outer face of the supporting roll 2 of the circular body 1 while forming a tensed wound layer 5'.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for wrapping a film around an article in packaging the article with a stretchable film.

(Prior art) Film wrapping in type 20 film packaging is accomplished by, for example, as shown in FIG. Generally, the film d is wound around the article a while the film d is pulled out from the winding roll by the rotation of the toric body C, with the film d being pivotally supported.

(Problems to be Solved by the Invention) The conventional means described above is because the balance of the torus C is greatly disrupted due to the unbalanced weight of the winding roll e due to fluctuations in the position of the winding roll e and the amount of film wound during its rotation. The rotational speed is limited, making it difficult to improve efficiency by increasing the speed.Also, when the rotational speed is increased, the film tends to break due to the impact caused by fluctuations in balance.Especially in the early stages of work, the film roll has a considerable weight. Because of this, the harmful effects increase. Furthermore, when the film on the roll runs out, it is necessary to interrupt the packaging operation and change the roll, and this interruption inevitably reduces work efficiency.

(Means for Solving the Problems) The present invention eliminates the above-mentioned conventional disadvantages, improves the rotational balance of the film winding torus, makes it compatible with high-speed operation and sudden stops, and makes replenishment of film easy. We provide a film winding device with improved operating efficiency.
A rotating torus is provided surrounding the article on the workbench and has a plurality of support rolls and winding rolls rotatably supported on its circumference, and is installed outside of the rotating torus. The elastic film of the rolled film roll is wound along the outer surface of each support roll of the torus, and the film is wound around the article from the inner surface of the wound layer via the winding roll.

(Function) In the present invention, the toric body (1
) The article is wound under tension along the outer surface of a plurality of support rolls (2) arranged on the circumference of the torus (1), and then passed through the winding roll (3) of the torus (1) and further under tension. Wrap around a.

At the initial stage of the above winding operation, the film (5) is wound around the article a by the winding roll (3) which rotates around the article a as the toric body (1) rotates. )
is wound around the outer circumferential surface of the torus (1) in a tensioned state by the rotation of the support roll (2), but the amount of winding of the film (5) wound on the outer circumferential surface is Since the amount of film (5) on the winding roll (4) side is larger than the amount to be wrapped around article a by roll (3), all of the film (5) on the winding roll (4) side is wrapped around the support roll (2) group of torus (1) during the winding operation. The winding roll (4) is emptied on the outside and the film (5) is stored forming a winding layer (5') around the outer periphery of the torus (1).

Therefore, during this time, the empty winding roll (4) is taken out and replaced with a new winding roll.

During this time, the winding roll (
The film wrapping operation for the article a that is sequentially replaced on the workbench is repeated by the rotation of step 3), but as the wrapped film (5) is wrapped around the article a and taken off, it is wrapped around each support roll. (2) The film layer (5') wound on the outer surface by free rotation is moved in the same direction with the rotation of the torus (1), and the film (5') is removed from the inner surface of the layer (5'). The film (5) is easily wrapped around the article a through the tensioned winding roll (3) while being unwound.

In addition, if a large number of products are to be wrapped in film continuously, 1
A cutting mechanism, a film end attachment mechanism, etc. are provided to cut the film and take it out from the workbench after wrapping an item, adhere the starting end of the film to the next item, and continue wrapping and wrapping the film. is the same as before.

(Example) Embodiments of the present invention will be described with reference to the drawings.

A is an article placed on a workbench and stabilized by fixing means if necessary, and (1) is an article surrounded by a plurality of support rolls (2) and one winding roll (3) on the circumference. ) are rotatably supported on their respective shafts, and in the illustrated example, the outer periphery of the toric body (1) is a gear ring, and a driving gear (8) driven by a motor (7) is engaged with this. The toric body (1) is fitted onto the annular frame (IQ) fixed to the fixed machine frame (9), and rotated at an appropriate speed in the direction of the arrow. A ball (101) is interposed between the surface and the annular frame (the outer circumferential surface of the IG) to support it so that it can rotate smoothly, and the support roll (2) and the winding roll (3) are provided with a toothed ring. Body (1
), and the other ends of each roll (2) and (3) were connected by an annular plate (la) to firmly support the axis of each roll without tilting individually. (4) is a roll of packaging film (5), which is removably installed on the structure frame (In), and its lower surface is covered with two receiving rolls (!21 (I
It was paid by Z.

In the illustrated example, the receiving roll (121
(! A tension applying device (6) consisting of two rolling cylinders (6a) and (8b) is provided below the rolling cylinder (6a) and (8b), and the film (5) wound around the winding roll (4) is transferred from one receiving roll to both rolling sides. (8
a) After wrapping it on the guide roll a3 via (8b), wrapping it along the outer surface of each support roll (2) of the torus (1) via the dancer roll (IQ), and then wrapping it on the wrapping roller ( 3)
The film (5), which is pulled out from the winding roll (4) by the rotation of the torus (1), is wound on the support roll (1) of the torus (1). 2) is stored by forming a wound layer (5') under tension on the outer surface of the material.

In the figure (I9 indicates a bending roll).

Incidentally, the rolling cylinder (6b) of the tensioning device (6) is operated by a motor (IG
The rolling cylinder (6b) is driven by the rolling cylinder (6b) via a transmission mechanism (17), and the rolling cylinder (6a)
In contrast, the rotation speed of the roller roller (6b) was increased, so the rotation speed of the roller roller (6b) was increased.
[ia) Appropriate tension is applied to the film (5) between (6b) to tension the film, and in that state, the torus (1)
By winding the film (5) around article a and wrapping it around article a, adhesive packaging of the film (5) to article a was ensured.

In addition, the film (5) utilizes its elasticity to wrap and wrap the article a on the workbench as shown in the figure. If you take out article a wrapped with film (5) from
) contracts and comes into close contact with article a.

Furthermore, the film winding roll (4) is rotated by interlocking one of the rollers (6a) and the receiving roll (2) of the tension applying device (6) to smoothly feed out the film (5), and if necessary, Winding roll (3) or support roll (2)
The rotation of the film (5) can be appropriately controlled by applying a brake using electricity or air to apply tension to the film (5) to further assist in tightening the film (5) around the article (a).

Furthermore, in the case of the prior art shown in FIG. 4 and the case of the present invention in the winding operation of the film (5) around the article a, if the article a is plate-shaped as shown in FIG. As shown in the figure, while the winding roll (3) rotates from A2 to A3 and from A3 to A4, the tension of the film (5) does not fluctuate relatively much, but from A2 to A3.
Also, while rotating from A4 to A, the tension of the film (5) increases, and for this reason, the film cannot be fed out from the winding roll (3), and the film is likely to be cut, especially during high-speed operation. However, in the case of the prior art, there was a problem in the means for dealing with this problem, but in the present invention, this problem was solved by the following means.

That is, in sections A2 to A3 and sections A4 to A7 in Fig. 3, abutting pieces aeqε that are in contact with the winding roll (3) are fixed along the rotation locus of the winding roll (3), and the winding is performed in the above sections. By causing the dipping roll (3) to rotate due to contact friction with the abutment piece (1&), the film (5) was sent out in a polar manner, thereby preventing the film from being cut due to an increase in tension.

In this case, the film winding roll (3) is the supporting roll (2).
) to prevent the support roll (2) from coming into contact with the abutment piece (13).

Incidentally, the above-mentioned abutment piece G& was attached to a fixed annular frame (IG).

In the above embodiment, one wrapping roll (3) is provided on the torus (1) to wrap one film (5) around the article a, but in FIG. As shown in , two or more film winding rolls (3) are arranged in parallel on a torus (1), and the same number of film winding rolls (4) as the winding rolls (3) are installed, and each The film (5) is wound onto the torus (1) from the winding roll (4), and the winding JiW (5'
) Wrap one film from the inside of each roll (3)
It is also possible to wrap the article a while pulling it out, and the number of wrapping rolls (3) can be increased or decreased.

(Effects of the Invention) According to the present invention, the film from the winding roll is wound along the outer surface of a group of rolls of a toric body in which a plurality of support rolls and winding rolls are rotatably arranged on the circumference. While taking the film, the film is taken out from the inner end of the wound film layer and is wound around the article using a winding roll, so the load is not biased when the toric body rotates, so there is no loss of balance. Smooth rotation enables high-speed operation and improves work efficiency. Also, during film winding work, the film on the winding roll is quickly wound onto the torus side and the winding roll becomes empty. The film can be replaced with the next film roll, and during this time the film continues to be wrapped around the article, so there is no reduction in operating efficiency. According to the winding process, the film layer wound around the torus moves freely in the rotating direction due to the free rotation of the support roll, so that the film is unwound from the inner surface of the layer. It has the effect of being easily wrapped around an article.

[Brief explanation of the drawing]

The drawings show an embodiment of the device of the present invention, in which Fig. 1 is a partial cross-sectional view, Fig. 2 is a partially cutaway plan view, and Fig. 3 is a front view (3) showing the film winding operation. ... Wrapping roll (4) ... Film winding roll (5) - Film
a... Article b... Workbench Figure 4

Claims (1)

[Claims] A rotating toric body (1) is provided surrounding the article a on the workbench b and having a plurality of support rolls (2) and winding rolls (3) each rotatably supported on the circumference. , the rotating torus (1)
A stretchable film (5) is wound along the outer surface of each support roll (2) of the toroidal body (1) from a film winding roll (4) installed on the outside of the toroidal body (1), and the elastic film (5) is wound from the inner surface of the wound layer. A film winding device for film wrapping, characterized in that a film (5) is wound around an article via a roll (3).