JPS6034314A - Method of sealing bag - 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 (Field of Industrial Application) The present invention relates to a method for sealing a bag which is open at the top and has a stuffing inside the bag.

(Prior Art) In general, a bag with an open top end and a stuffed bag inside the bag is sealed using a heat cutter that clamps the top end and heats the bag for sealing.

By the way, when a stuffed bag is put into a bag with an open top end, the bag becomes thick due to the stuffed stuff, and the opening of the bag widens irregularly. For this reason, when the upper end of such a bag is heat-sealed by the above-described method, the heat-sealed portion may wrinkle or shift, and the heat-sealed bag may become a defective product.

(Object of the Invention) The present invention solves the above-mentioned problems, and its object is to seal the upper end of a bag containing a stuffed bag without causing wrinkles or displacement.

(Structure of the Invention) In order to achieve the above object, the present invention provides a bag having an open top end and containing a bag Q'+'4 items inside the bag, with either of the top opening edges are stretched by separating opposing parts of the bag from each other, and in this state, the upper end of the bag is pressed and clamped from a side substantially perpendicular to the direction in which the bag is stretched, and then, The structure is such that the parts are heat-sealed.

With the above-described configuration, even if the upper end of the bag containing the stuffed material is sealed, the sealed portion will not wrinkle or shift.

(Example) Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a heat cut shield device 1 for implementing the method according to the present invention, and the heat cut shield device @1 includes a conveying device 2, a pair of levers 3, and a pair of pressing members. 4 and a pair of heating members 5.

The conveying device 2 has a belt conveyor of 6 and 7.8 colors. The belt conveyor 6 extends in one direction with its conveying surface facing upward, and on the conveying surface of the belt conveyor 6, a belt conveyor 7.8 is placed on each conveying surface. They are arranged to face each other vertically. These belt conveyors 6, 7.8 are driven in the same conveying direction and at the same speed, and the belt conveyor 7.8 is adjusted to the thickness of the bag 9 so that the distance between the opposing conveying surfaces of the belt conveyor 7.8 can be adjusted. The intervals between the conveying surfaces are approximately the same. For this reason, the bag 9 containing the stuffed material is conveyed in an upright position by the belt conveyor 6.7.8 when the bag 9 is guided to the belt conveyor 6.7.8. An optical sensor (path shown) is placed at a predetermined position on the belt conveyor 6, and when this optical sensor detects a bag 9 containing stuffed material, it activates a timer (path shown). The function of the timer will be described later along with its function.

10 is a frame, and the frame 10i is arranged on the belt conveyor 6. A pair of fixtures 11 are attached to the frame 10 above the belt conveyor 6 in the direction in which the belt conveyor 6 extends. Lever 3
is supported at its midpoint so as to be rotatable in clockwise and counterclockwise directions in FIG. The pair of levers 5 have their base ends (top ends in FIGS. 1 and 2) connected to a drive source (path shown) via a link mechanism (part of the link mechanism 13 is shown) 13. When the base end of each lever 5 is raised by the drive source at the support 12 (il-fulcrum), the tip of each lever 3 (lower end in FIGS. 1 and 2) , descend using the support 12 as a fulcrum and separate from each other (see Fig. 2).At this time, the tip of each lever 3 is
When a bag 9 in an upright state is placed on the conveyance surface of the belt conveyor 6, the bag 9 is lowered to its upper end.

Furthermore, when the base end of each lever 3 is lowered by the drive source using the support 12 as a fulcrum, the tip of each lever 3 is
They rise using the support 12 as a fulcrum and approach each other. At this time, if a bag 9 in an upright state is placed on the conveyance surface of the belt conveyor 6, the tip of each lever 3 has risen above the bag 9.

14.15 is an air cylinder, and the air cylinder 14.1
5 is held on a frame 10 above the belt conveyor 6, 7.8, and each piston rod 16,
The protruding end sides of the belt conveyor 17 face each other across the conveyance surface of the belt conveyor B.

A suppression member 4 is attached to the protruding end of each piston rod 16.17, and each suppression member 4 is connected to the piston rod 16, 1 in each air cylinder 14.15.
Due to the expansion and contraction of 7, they come into contact with each other or separate from each other. Each of the pressing members 4 is positioned IW slightly below the position where the tip of the lever 3 descends the most (see FIG. 2).

Above each air cylinder 14.15, air cylinder 1
8 and 19 are each held by the frame 10, and the protruding end sides of the piston rods 20 and 21 are opposed to each other across the conveying surface of the belt conveyor 6. A heating member 5 is attached to the protruding end of each piston rod 20, 21, and each heating member 5 comes into contact with or separates from each other as the piston rods 20, 21 in each air cylinder 18, 19 expand and contract. The pair of heating members 5 are located slightly above the position of the pressing member 4, and a heater that provides heat to the heating members 5 is embedded in the pair of heating members 5. β1, this heating member 5 may have a cutting function to determine the upper end of the bag 9.

Next, the effect will be explained.

When the bag 9, which has an open top end and contains the stuffing inside, is conveyed to a predetermined position If by the conveyors 6, 7.8, the bag 9 is detected by an optical sensor (path shown). , the optical sensor activates a timer (shown in the diagram) and starts a series of sealing steps. In other words, simultaneously with the activation of the timer, the belt conveyors 6, 7.8 stop, and the bag 9 containing the stuffed material stops at a predetermined position. Next, the base end portions of the pair of levers 3 are raised via the link mechanism 13, and accordingly, the tip portions of each lever 3 are moved from the opening to the inside of the bag 9 at the upper end portion using the support 12 as a fulcrum. The opening edge of the bag is stretched in the direction in which the belt conveyor 6, 7.8 extends. Next, a pair of opposing suppressing members 4 hold the upper end of the stretched bag 9 against the air cylinders 14 and 15.
The bag 9 is pressed and clamped from the side perpendicular to the tension direction by the operation of the bag 9, and after the pressure clamping, the tip end of each lever 6 is moved down to the support 12 as the base end of each lever 3 is lowered via a link mechanism. Exit from inside the bag 9 using the point as a fulcrum.

Thereafter, a pair of heating members 5 facing each other presses a portion of the bag 9 above the drying part of the bag 9 through the operation of air cylinders 18 and 19, and heat seals (thermal seals) that portion. do. Therefore, bag 9 containing bag stuffing
Since the upper end is heated and sealed in a tensioned state, there will be no wrinkles or misalignment at the upper end.

When the upper end of the bag 9 is heat-sealed, both the suppressing member 4 and the heating member 5 are moved away from the bag 9 by the operation of the air cylinders 14, 15° 18, 19, and returned to their original positions. At the same time, the timer stops operating and the belt conveyors 6, 7.8
is driven, and the bag 9 containing the bag stuff is transferred to the belt conveyor 6.
, 7.8, it is transported to the next process.

(Effects of the Invention) As described above, the present invention can seal the upper end of a bag containing a stuffed bag without causing wrinkles or displacement.

[Brief explanation of drawings]

FIG. 1 is an enlarged front view of the main parts of an apparatus for carrying out the present invention, and FIG. 2 is a side view showing the vicinity of the lever. ? ... Bag containing stuffed bag patent applicant Orion Kikai Kogyo Co., Ltd. agent Patent attorney Yumi Sae (and one other person)

Claims (1)

[Claims] (1) A bag with an open top end and a stuffed bag inside is stretched so that any opposing portions of the top opening edges are separated from each other, and in this state, the top end of the bag is tightened. . A method for sealing a bag, comprising: pressing and clamping the bag from a side substantially perpendicular to the direction in which the bag is stretched, and then heat-sealing a portion above the pressing and clamping portion of the bag.