JPS5962413A - Method and device for preparatorily opening bottom of self- erecting pouch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for pre-opening a self-supporting pouch, and more particularly, to a method and apparatus for pre-opening a self-supporting pouch, and more particularly to a method and apparatus for pre-opening a self-supporting pouch, and more particularly to a method and apparatus for pre-opening a self-supporting pouch, and more particularly to a method and apparatus for pre-opening a self-supporting pouch. This invention relates to a preliminary bottom opening method and device.

In this specification, self-supporting pouch (hereinafter referred to as pouch)
As shown in FIG. 1, the opposite side edges of the wall portions 2 are heat-sealed to form the heat-sealed portion 3, and the bottom portion 4, which is folded in half and has a bent portion 4a, is attached to each wall portion. 2
This refers to a type of pouch 1 in which a heat-sealed portion 5 (see FIG. 5(a)) is formed. The heat seal portion 5 gradually becomes higher toward both side edges.

When the flat pouch 1 is expanded by blowing gas, e.g. Due to the inverted arch-like curved surface shape, each lower end 2a of the wall portion 2, that is, each heat seal portion 5, is sufficiently opened so as to be separated from each other.
Couch 1 becomes independent.

When the pouch 1 is manufactured, the wall portions 2 are in contact with each other (
partially or completely) flattened. Therefore, prior to filling the pouch 1 with the contents, it is necessary to expand the flat pouch 1 so that the bottom portion 4 is fully opened as shown in FIG. 2(C). This expansion is usually done by holding the flat pouch 1 in a holder (
(Fig. 3), or after gripping both edges near the upper part of the mother-pinch 1 with grippers, insert the nozzle into the opening 6, seal the opening 6, and remove the nozzle. This is done by blowing in more gas.

However, if the vicinity of the lower end of the nokuchi 1 is curved in the width direction, or if the bottom part 4 and the inner surface of the wall part 2 are in close contact (see FIG. The purpose is to ensure that the bottom part 4 does not open even when it is jammed, and therefore does not fully expand, thereby achieving self-reliance.

In order to achieve the above-mentioned object, the present invention provides a flat self-supporting structure whose walls are in contact with each other, before the process of blowing gas from the mouth to expand the four-dimensional structure. A self-supporting device characterized in that each outer surface of the wall portion near the lower end of the house is suctioned by opposing vacuum suction devices, and the vacuum suction devices are separated.
This provides a method for preliminary opening of a J-pouch.

Furthermore, the present invention provides a flat self-supporting structure i4 in which the wall portions are in contact with each other.
This device is used to preliminarily open the bottom of the pouch before blowing gas through the mouth to expand the pouch. A chute for guiding the pouch, which engages with the lower end of the pouch and
A stop yard 1 is provided to stop the house from falling and hold the house at a predetermined level, and is installed at a position facing the wall near the lower end of the stopped house and is almost perpendicular to the wall. The present invention provides a self-supporting preliminary bottom-opening device that is characterized by being equipped with a pair of vacuum suction devices for the wall portion that can reciprocate in different directions.

The present invention will be described below with reference to the drawings which are examples.

(3) In Figures 3 and 4, 10 is i'? 1 is our preliminary bottom opening device, and 11 is a stacker. Stacker 1
1 is provided inside the side wall plate 12 and the lower part of the side wall plate 12;
An id rod 13 having a slight downward slope to the right, a protrusion 14 provided at the right end of the guide rod 13 for locking the pouch 1, and a bottom plate 15 having a slight downward slope to the right.
The upper part automatically moves to the right as pouch 1 is sent out,
Weight 16a and pressing plate 16b for stacked pouches 1
It is equipped with a weight car 16 having a weight. No.1 is the mouth part 6
is stacked on the guide rod 130 portion between the protrusion 14 and the pressing plate 16b with the upper side facing upward.

The preliminary bottom opening device 10 includes a chute 17, a transfer tool 18 having a suction cup 18a for vacuum suction for transferring the pouches 1 in the stacker 11 into the chute 17, and a device for stopping and holding the pouches 1 falling within the chute 17. Shoot 17
a stopper 19 that can be held in the lower opening 17a of the stopper 19, and a stopper 19 that is provided facing each other slightly above the lower opening 17;
It has a suction cup 20a for vacuum suction, and is equipped with a bottom opening tool 20 that can reciprocate in a horizontal direction substantially perpendicular to the wall portion 2 of the pouch 1 (4). On the left wall of the chute 17 facing the stacker 11 in FIG. 4, there is a /? A hole 17b is formed through which the house 1 can pass. Further, in the right side wall of FIG. 4, there is a hole 17c1 through which the transfer tool 18 can pass, and in the center in the width direction above the lower opening 17a there is a hole 17d through which the bottom opening tool 20 can pass.

17e is formed. The lower part of the chute 17 is formed in a V-shape so that the lower opening 17a is narrow.

The transfer tool 18 moves forward to the left at a predetermined timing, sucks the pouch 1 in the front row with the suction cup 18a, and retreats, until the point when the pouch 1 comes into contact with the wall on the right side (in FIG. 4). Then, a vacuum valve (not shown) is operated to cut off the vacuum of the suction cup 18a, and the vacuum chamber 1 is configured to fall freely within the chute 17.

Stay away! -19 closes and closes the lower opening 17a of the chute while the guchi 1 is freely falling and while the preliminary bottom opening is being applied by the bottom opening tool 20, and after the bottom opening is completed, the arrow The pouch 1 is configured to be able to fall into the holder 21 by moving in the four directions to open the lower opening 17a.

When the bottom opening tool 20 falls, the stopper 1
During the period until it is stopped by 9, it is moved to a retreated position (for example, the position shown in Figure 4) so that it is out of the falling path of Nocchi 1.
Then move forward at the same time as pouch 1 stops, and move forward as shown in Figure 5 (,
), each suction cup 20a suctions a portion of the wall portion 2 near the lower end of the motherboard 1, preferably the central portion in the width direction between the bent portion 4a and the heat seal portion 5, and immediately It is configured to move backwards. As the bottom-opening device 2o moves back, the resistance of the bottom-opening pot increases, but due to this resistance, the degree of vacuum applied to the suction cup 20a is such that the retraction distance is about 2 degrees or more, preferably about 15 degrees or less. The size is set such that 20a is separated from the wall portion 2.

Alternatively, a vacuum valve (not shown) may be operated to release the vacuum at the same time as the distance is retreated.

In the above apparatus, among the flat pouches stacked in a large number of stackers 11 with the mouth portions 6 facing upward, A' pouches 1 in the front row are transferred into the chute 17 by the transfer device 18 and immediately fall. It is locked on the stop horn 4-19 as shown by the dashed line in FIG. 4. In this state, the lower end 2a of the wall of the pouch 1
It is closed as shown in Figure (a). Immediately thereafter, the bottom opening tool 20 moves forward, and each suction cup 20a attracts a portion near the lower end 2a of the wall portion 2 and retreats. Therefore, as shown in FIG. 5(b), a gap 22 is formed between the wall portion 2 and the bottom portion 4,
Preliminary bottom opening is performed as shown in FIG. 2(b).

Since the gap 22 is formed in this way, after the mouthpiece 1 is inserted into the holder 21, it is transferred to an expanding device (not shown), and the device releases gas from a nozzle inserted into the front part. When insufflated, the bottom portion 4 also opens fully as shown in FIG. 2(c), resulting in complete expansion.

The present invention is not limited to the above examples,
For example, the stocking and opening devices may be provided intermediate the level of the lower (7) opening and the transfer device. Moreover, instead of the holder 21, grips or grips for gripping the upper portions of both side edges of the notebook 1 may be used. .

According to the present invention, before the step of inserting a nozzle into the mouth of a flat pouch and blowing gas through the nozzle to expand it, a gap is formed in advance between the bottom and the wall using a vacuum suction tool. - Even if the vicinity of the lower end of the mouthpiece is curved or the bottom and the inner surface of the wall are in close contact, the expansion can be performed reliably.

Further, the bottom opening tool having the vacuum suction tool has the advantage that the device is simplified because it is attached to the chute to guide the couch from the stacker to the holder or gripper.

[Brief explanation of drawings]

Fig. 1 is a front view of an example of the pouch applied to the present invention, Fig. 2 is a bottom view of the pouch shown in Fig. 1, and Fig. 2(a)
, (b) and (c) are drawings showing the state before preliminary bottom opening, the state after preliminary bottom opening, and the state after expansion, respectively; FIG. 3 is a front view of the device which is one embodiment of the present invention; (8) Fig. 4 is a vertical cross-sectional view along the IV-IV line of the *th time, and Fig. 5 is a longitudinal cross-sectional view of the main part for explaining the preliminary bottom opening operation, and Fig. 5 (a) 5(b) is a drawing showing the state immediately before the bottom is opened, and FIG. 5(b) is a drawing showing the state after the bottom is opened. 1... Independence/mother's foot, 2... Wall, 4... Bottom, 6... Mouth, 10... Preliminary bottom-opening device, 17... Chute, 19 Straight... 120a...Sucker for vacuum suction (vacuum suction tool). Agent: Patent attorney Yue Shuto Department

Claims (2)

[Claims] (1) The process of expanding the pouch by blowing gas from the mouth into a flat self-supporting pouch whose walls are in contact with each other. Bottom method. (2) A device for preliminarily opening the bottom of a flat self-supporting pouch whose walls are in contact with each other before blowing gas through the mouth to expand the pouch. The device includes a chute that guides the falling pouch with its bottom facing down, and a chute that engages with the lower end of the pouch to stop the pouch from falling and brings the pouch to a predetermined level. A pair of wall portions are provided at positions facing the wall portion near the lower ends of the holding saw and the stopped machining tool, and are capable of reciprocating in a direction substantially perpendicular to the wall portion. A preliminary bottom opening device for a self-supporting pouch characterized by being equipped with a vacuum suction device.