JPH04339730A - Bag body shaping device - Google Patents

Abstract

PURPOSE:To perform extension-shaping of a bag body (particularly a thick vinyl bag or aluminum bag, etc., which is a self-standing type bag with a folded part on the bottom) to store a content, efficiently and assuredly. CONSTITUTION:The title bag body shaping device is a device which pinches upper both side end edges of a bag body 10, which has an opening on the top end and a folded part on the bottom, by a chuck 9, and a feature of the device is that a folding means for which a male body 1a and a female body 1b to pinch lower both side end edges of the bag body and fold them into U-shape are fitted to each other is provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a bag shaping device for expanding and shaping a bag which is intended to contain a filling.

0002

[Prior Art] Bagged products containing food and other fillings are not only cheap and easy to open, but also convenient for packaging and transportation, and have recently been applied to many products. Many automatic packaging machines that automatically perform packing have also been put into practical use. A bag shaping device is a device that expands and shapes the opening of the bag and the bag body to assist in supplying the filling when filling the bag.The conventional general shaping method is as shown in Fig. As shown in FIGS. 7 and 8, when the bag 10 with both upper side edges held by the chucks 9, 9 is sent, the upper and lower parts of the bag 10 are sucked from both sides by suction cups 11a, 11b and 12a, 1.
While sucking and expanding 2b, insert the conical pestle 1 from the opening.
3 is pushed in, air is blown into the punch 13 through an air hole 13a provided in the punch 13 to perform expansion shaping.

0003

[Problems to be Solved by the Invention] However, since the conventional shaping device as described above is not provided with any means for holding the bag body 10 in a vertical state and correcting the inclination in the plane direction, as shown in FIG. As shown, the bag 10 is curved in an amorphous manner in the plane direction, and therefore the suction cup is not fully attracted to the bag surface, resulting in insufficient expansion. Particularly in the case of a self-standing bag such as a thick-walled plastic bag or aluminum bag with a folded part at the bottom, there is a problem in that the bag cannot be completely expanded to the bottom with just blown air because the bag is very rigid.

0004

[Means for Solving the Problems] In order to solve the above problems, the present invention has a bag having an opening at the top end and a folding part at the bottom. This bag shaping device expands and shapes the bag by sucking both sides of the folded part and both sides of the folded part with suction cups and expanding it while blowing air into the bag. It is characterized in that it is provided with a bending means by fitting a male body and a female body to be bent into a U-shape.

[0005]

[Example] Since the lower end edges of the bag are bent by the bending means by fitting the male body and the female body, the curvature in both directions of the bag held by the chuck is corrected and almost Since the bag is held in a vertical position, the suction cup can be firmly attracted to the bag surface, and the bag can be fully expanded to the folded portion, and the blown air can be spread to every corner to completely expand and shape the bag.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 are a front view and a plan view of a bag shaping device according to the present invention. In the figure, 1b is a female body having a recess m inward, and 1a is a male body that fits into the recess m of the female body 1b. The action of bending is performed while pinching the edges. Here, the male body 1a is supported by a support rod 3a, and the female body 1b is supported by the support rod 3b. At the same time, the lower part of the guide rods 6a and 6b is fitted and supported in a slidable manner via a sliding member 4b, respectively.

On the other hand, a double-acting air cylinder 8 that expands and contracts in both left and right directions is installed on the pedestal 7. Its piston rod 8a is connected to the sliding member 4a, and its rear end is connected to the connecting member 14.
and 15, it is connected to the sliding member 4b. On the other hand, the male body 1a and the female body 1b are provided with suckers 2a and 2b, respectively.

The bending means has the above-mentioned structure, and when the double-acting air cinder 8 expands and contracts, the sliding members 4a,
4b interlocks and slides on the guide rods 5a, 5b and 6a, 6b, the male body 1a and the female body 1b are fitted together as shown by the two-dot chain line, and the bag body 10 is bent while being sandwiched therebetween. At this point, the suction cups 2a and 2b are sucked from both sides of the bag body 10.

In the above example, the double-acting air cinder 8 is used as the driving means, but a cam type, rack and pinion type, etc. can also be used.

Next, the operation will be explained based on FIGS. 3 to 6. When the bag body 10 whose upper side edges are held between the chucks 9, 9 is sent from the previous process, the bending means is activated to fit the male body 1a and the female body 1b, and the bag body 10 is inserted between them. body 10
Pinch the lower part of and bend it as shown in Figure 4 (plan view). Then, the bag 10 is corrected and held in a substantially vertical position as shown in FIG.

[0011] Next, separate suction cups 12a and 12b are attached to the bag body 10.
Suction cups 2a and 2b are respectively attached to both sides of the lower part of the bag body 10. At this time, since the bag body 10 is in a substantially vertical position, suction can be performed reliably.

Thereafter, the suction cups 12a and 12b are separated in the left-right direction to open the opening of the bag 10, and the pestle 13 is inserted to blow air through the air hole 13a. At the same time, the folding means is operated to separate the male body 1a and the female body 1b, and the lower folded portion of the bag body 10 is expanded by the suction cups 2a and 2b.

As a result, the blown air reaches the bottom of the bag, the folded part is completely expanded, and the shaping of the bag 10 is completed.After this, the punch 13 is pulled out and the filling material is removed from the hopper 16 as shown in FIG. supply g.

[0014]

Effects of the Invention As described above, in the present invention, when shaping the bag, the lower both end edges of the bag 10 are bent by the bending means, so that the bag 10 held between the chucks can be bent.
The curvature in the surface direction is corrected and the surface is held in a substantially vertical state. Therefore, the suction cup is reliably attracted to the bag surface, the folded portion is sufficiently expanded by the suction cup, and the bag body is completely expanded and shaped by the blown air.

[Brief explanation of drawings]

FIG. 1 is a front view of the device of the present invention.

FIG. 2 is a plan view of the same as above.

FIGS. 3 to 6 are explanatory diagrams of operations in which the bag is shaped.

FIGS. 7 to 9 are explanatory diagrams of a bag body shaping state by a conventional device.

[Explanation of symbols]

1a male body
9 Chuck 1b female body
10 Bag bodies 2a, 2b Suction cup 13
Pestle 7 Stand

Claims (1)

[Claims] [Claim 1] A bag having an opening at the top end and a folded part at the bottom is held by chucks, and both sides of the opening and both sides of the folded part are sucked by suction cups. As a bag shaping device that expands and shapes the bag by blowing air into the bag while expanding, it uses a male body and a female body that fit together to sandwich the lower side edges of the bag and bend it into a U-shape. A bag shaping device characterized by being provided with a bending means.