JPS643726B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a powder continuous filling cylindrical bag making device for filling powder or fine powder into a cylindrical bag and making bags continuously. However, when the cylindrical bag is transferred downward by the required length by the horizontal heat sealing means, powder is prevented from flying up inside the cylindrical bag and the powder is transferred in a stable state. The purpose is to prevent powder from entering the lateral seal area and to ensure a reliable and clean seal.

The present applicant had previously developed a continuous filling cylindrical bag-making device for powder and granules (Japanese Patent Publication No. 1971-715).
When filling and packaging powder or granules, this product receives the filling from a weighing machine by a temporary stop pressing member installed between a vertical heat sealing member and a horizontal heat sealing member, and then The stop pressing member is released to allow the filling to fall downward again. At the same time, the horizontal heat-sealing member located below transfers the cylindrical bag downward a required length (for one bag) while pressing and pinching the cylindrical bag from both sides at a predetermined position and heat-sealing the bag. , it opens again and rises to a predetermined position above to prepare for the next operation. Therefore, in the above device, when the filling material received by the temporary stop pressing member is dropped again by the release of the member, it flies up inside the cylindrical bag and becomes unstable. Not only was there a risk of interfering with the work, but also a part of the floating filling material could get into the next horizontal sealing area, making it impossible to seal reliably and cleanly. Depending on the material of the body, one heat-compression bonding may not be enough to seal the body, which has the disadvantage of limiting the range of use of the material, and in order to ensure a reliable seal, the heat-compression bonding time may be longer. However, there were drawbacks such as the inability to perform packaging operations at high speed.

The present invention provides a temporary pressing and heat sealing member for temporarily stopping the powder directly below the cylindrical wall, so that most of the predetermined amount of powder to be packaged is kept within the cylindrical wall. The temporary stop pressing member is also used as a heat sealing member to receive the powder and to horizontally seal the cylindrical bag in this part. When the temporary pressing and heat sealing member is opened in this manner, the received filling falls again inside the cylindrical bag and a part of it flies up,
By preventing this from entering the next horizontal seal part and heat sealing the same part twice,
The present invention eliminates the drawbacks of the prior art by making it possible to perform sealing reliably regardless of the material of the cylindrical bag, and to perform packaging work at high speed.

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 1 to 4.
This will be explained in detail along the drawings.

Reference numeral 1 denotes a band of plastic film, paper, etc., which is wound and rotatably disposed as appropriate. It gradually forms a cylindrical shape and runs in the direction of arrow X through a gap 7 formed between a cylindrical wall body 5 located at , and a guide member 6 provided on its outer periphery. This gap 7
At this point, both end edges of the band 1 are superimposed on each other, and when it emerges from the gap 7, a complete cylindrical shape is formed. At this time, in order to ensure that both side edge portions of the strip 1 that have passed through the gap 7 are always overlapped with uniform dimensions, the guide member 6 is placed on the strip 1. A lead member 9 made of a relatively hard elastic material such as Teflon or the like is provided with its tip inserted and guided between both side edge portions. Reference numeral 10 denotes a vertical heat-sealing member, which abuts against the overlapping portions 11 of both side edges of the cylindrical band 1 and electrically heats it to adhere this portion by heat-sealing. 12, 12' are this vertical heat sealing member 10
While contacting and heat-sealing (in some cases cooling) the overlapping portions 11, pressing and heat-sealing the lower part of the formed cylindrical bag 8 from the front and back surfaces, the bag 8 is stretched to the required length. A pair of horizontal heat-sealing members are provided so as to be freely drivable so as to be moved downward by the amount of the air. The crank mechanism 13 is connected to a well-known crank mechanism 13 for related operations. 14 synchronously connects with the horizontal heat-sealing members 12, 12' to cut the widthwise sealed portion 8' of the cylindrical bag 8 heat-sealed by the horizontal heat-sealing members 12, 12'. A cutting member 14 is disposed below the heat sealing member so as to be driven, and the cutting member 14 includes a fixed blade 14a on one side and a movable blade 14b on the other side.
These blades 14a, 14b are always open, and between these blades 14a, 14b, the width direction seal portion 8' of the cylindrical bag 8, which is transferred downward, is sealed by the crank mechanism 13. The cut is made by appropriately driving one of the movable blades 14b by a well-known driving means at the moment when the cutter is transferred by the length of , or during the transfer.

Reference numeral 15 denotes a hopper in which, for example, powders such as pharmaceuticals, sugar, etc., and finely powdered fillings 16 are stored, and a well-known rotary weighing machine 17 is connected to the lower outlet of this hopper for taking out the appropriate amount of the fillings. There is. A chute 18 is provided at the outlet of this weighing machine 17. The tip of this chute 18 is inserted inside the cylindrical wall 5, and the filler 16 is periodically taken out in the required constant amount by the rotation of the rotary weighing machine 17 (taken out 4 times per rotation). ), passes through the cylindrical wall 5 and is charged into the cylindrical bag 8.

At this time, the pair of horizontal heat sealing members 12, 1
A well-known seal on the outside of the cylindrical bag body 8 is provided by a pair of temporary pressing/heat sealing members 19, 19' which are provided above the cylindrical wall body 2' and directly below the cylindrical wall body 5 so as to be freely movable in a substantially horizontal direction. The filling material 16 to be charged and filled is temporarily stopped by being clamped and pressed by the driving means. 20 is a box body for storing the completed bag body 8''.

Next, the operation of continuous filling and bag making using such an apparatus will be explained step by step with reference to FIGS. 4A to 4F.

First, as shown in FIG. 4A, the band 1 is passed through the gap 7 formed between the cylindrical wall 5 and the guide member 6 to form the cylindrical bag 8 while a pair of temporary pressing and heat sealing steps are performed. It is passed between the members 19 and 19' and between the pair of horizontal heat sealing members 12 and 12', respectively, and set to the lower position. Next, as shown in FIG.
9 and 19' are operated in the direction of the arrow, respectively, and the empty cylindrical bag 8 is clamped, pressed and heat-sealed by the temporary stop pressing and heat sealing members 19 and 19', and at the same time, the empty cylindrical bag 8 is periodically taken out from the weighing machine 17. The filling 16 is
While most of it is inside the cylindrical wall 5, it is temporarily stopped by the above-mentioned temporary stop pressing and heat sealing members 19, 19'. At this time, the horizontal heat sealing member 12,1
2' also operates at a predetermined position below to press and hold a predetermined portion of the cylindrical bag body 8.

Next, as shown in FIG.
2 and 12' downward, and the cylindrical bag 8 is transferred by a required length (one bag) in the downward direction of the arrow, as shown in FIG. 4D. The moment the cut member 14 is moved to a predetermined position, the cut member 14 interlocking with the horizontal heat seal members 12, 12' is activated to seal the cylindrical bag 8.
Cut the bottom part. In this case, the bag is empty and is not filled with the filler 16. This figure 4c,
In d, the temporary pressing and heat sealing member 1
9, 19' remain open. When the cutting operation of the cutting member 14 is completed, as shown in FIG.
is operated in the direction of the arrow in the same manner as in the case shown in FIG.
holds and presses the cylindrical bag 8, and at the same time, the filling 1
6 is supplied into the cylindrical wall body 5 and temporarily stopped by the above-mentioned temporary stop pressing and heat sealing members 19, 19'. At this time, the horizontal heat sealing members 12, 12' have already been
The cut member 14 then returns to its original position, and the horizontal heat seal members 12, 12' press and hold the cylindrical bag 8 at a predetermined location.

Next, as shown in FIG. 4, the temporary pressing and heat-sealing members 19 and 19' are respectively operated in the horizontal direction of the arrow to open them, and at the same time, the horizontal heat-sealing member 1 is opened.
2 and 12' downward, and while heat-sealing the width direction of the cylindrical bag 8 (in some cases, the sealing effect can be improved by cooling), the cylindrical bag 8 is heated to the required length (one time). (bags worth) downward. The moment the bag is moved to a predetermined position, the cutting member 14, which interlocks with the horizontal heat-sealing members 12, 12', operates to cut the cylindrical bag 8. That is,
The bag body 8'' is cut off. In this case as well, the bag body 8'' is an empty bag body without the filling material 16 as shown in the figure. A filled bag 8'' is obtained.

According to the present invention, the sealing portion of the cylindrical bag to be pressed and heat-sealed by the horizontal heat-sealing means directly below the cylindrical wall is sealed by the horizontal heat-sealing device by the drive mechanism that performs a predetermined horizontal opening/closing movement. By providing a pair of temporary pressing and heat sealing means that pinch and press heat seal from both sides when the means is in an open state, and release the pressed state when the horizontal heat seal means is in a closed state, a predetermined amount of material to be packaged can be sealed. Most of the filling is received within the cylindrical wall so that the filling can be transferred in a stable state, and the temporary pressing and heat-sealing means is used to receive the filling and in that part. Lateral sealing of the cylindrical bag is also performed, so that when the temporary stop pressing and heat sealing means is opened, the received filling falls again inside the cylindrical bag and a part of it flies up; By preventing this from entering the next horizontal sealing part, and by heat-sealing the horizontal sealing part by the temporary pressing and heat-sealing means again by the horizontal heat-sealing means, the material of the cylindrical bag body can be prevented. It has the advantages of being able to seal reliably and neatly without any problems, and also allowing for high-speed packaging work.

The horizontal heat-sealing member in this embodiment may be a cooling sealing member, and the sealing effect may be further enhanced by pressing and cooling the heat-sealed area with the temporary pressing and heat-sealing member.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention;
FIG. 2 is a front view of the same as the above, FIG. 3 is a perspective view showing the main parts of the same, and FIGS. DESCRIPTION OF SYMBOLS 1... Band body, 5... Cylindrical wall body, 6... Guide member, 7
... Gap, 8... Cylindrical bag body, 10... Vertical heat sealing member, 11... Overlapping portion, 12, 12'... Horizontal heat sealing member, 13... Crank mechanism, 14... Cut member, 15... Hopper, 16... Filling material, 17... Rotary weighing machine, 19, 19'... Temporary stop pressing and heat sealing member.

Claims (1)

[Claims] 1. A hopper containing a filling material, an appropriate amount extraction means connected to the outlet of the hopper to intermittently take out a predetermined amount of the filling material in the hopper, and a cylindrical wall body and a guide member provided on its outer periphery. The band is arranged so that it passes through the gap formed between the band and is transferred downward while overlapping both side edges of the band, and the overlapping portions of both side edges of this band are heat-sealed to form a tube. A vertical heat-sealing means provided to form a bag-shaped bag, and a drive mechanism that opens, closes, and moves up and down a predetermined position of the cylindrical bag formed by the vertical heat-sealing means press heat. In a continuous filling cylindrical bag making device comprising a pair of horizontal heat sealing means provided to move the bag downward by a required length while sealing, the horizontal heat sealing means and the vertical heat sealing means are provided. The area located directly under the cylindrical wall between the means and to be pressed and heat-sealed by the horizontal heat-sealing means is opened and opened in a predetermined horizontal direction.
a pair of temporary pressing and heat sealing means for pinching and pressing heat sealing from both sides when the horizontal heat sealing means is in the open state by a drive mechanism that performs a closing motion, and releasing the pressed state when the horizontal heat sealing means is in the closed state; A continuous powder filling cylindrical bag making device characterized by comprising: