JPS5864907A - Cylindrical bag manufacturing packing device - 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 cylindrical bag making and packaging apparatus that manufactures a cylindrical bag from a strip-shaped film, drops a powder filling into the bag, and seals the bag.

A conventional device of this type is known, for example, from Japanese Patent No. 1983-715. This conventional device is equipped with a conduit that guides the filling downward from a measuring device that intermittently measures a predetermined amount of powdered or granular filling, and a strip-shaped film is supplied from the side of the conduit. The strip-like film is vertically sealed while surrounding the conduit to form a continuous cylinder, and the continuous cylinder is horizontally sealed to drop the weighed filling into the formed bag. The dropped filling is hermetically packaged by performing the next horizontal seal while the body is displaced a predetermined length downward.

Conventional equipment like this has no problems when packing smooth materials such as granulated sugar or granular drugs, but when it is used to package fine powders, the following problems arise. be.

In other words, when the weighed powder falls into the sealed cylindrical bag, the air inside the conduit and the cylindrical bag passes through the gap between the outer circumference of the conduit and the film and is released to the outside world, resulting in air floating in the air. The fine powder flowed along the path, and as a result, the suspended powder reached the upper part K of the vertical seal, causing a vertical seal failure. Furthermore, since the next horizontal seal position, which is lower than the vertical seal position, was even more heavily contaminated by floating powder, the horizontal seal was naturally also defective.

In order to solve this problem, we tried to improve the conduit by making it a double pipe and connecting the outer tube to a vacuum pump to suck up the floating fine powder, but it was difficult to fill the cylindrical bag with a single metered amount. When an object falls, the air inside the cylindrical bag is compressed to the bottom end,
Since this compressed air explosively flows toward the vacuum exhaust pipe, it has not been possible to prevent floating powder from staining the inner surface of the film. Therefore, for example, even if it is possible to perform high-speed operation at 80 pieces per minute when packaging granulated sugar, practical packaging is only possible when packaging fine powder at 20 pieces per minute or less. Ta.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cylindrical bag making and packaging apparatus that does not cause sealing defects even when packaging fine powder and is capable of high-speed operation.

The present invention extends the lower end of the conduit for guiding the powder filling into the cylindrical bag below the next horizontal sealing position, and provides an exhaust path in parallel along the lower end of the conduit that communicates with the decompression device. It is characterized in that a flow regulating element is provided at the lower end of the conduit to deflect the flow direction of the powder from the axial direction.

The flow regulating element in the present invention may be any element that forms an exhaust path that allows the air at the bottom of the cylindrical bag to escape upward by deflecting the flow direction of the powder falling in the conduit from the axial direction. Specifically, in addition to the edge shape with a triangular cross-sectional shape shown in the example, a rod-like body with an oval, circular, or rhomboid cross-sectional shape, a plate-like body such as an inclined plate or a twisted plate, or a predetermined shape. It can be implemented by an element with an inclined or curved surface.

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an overall configuration diagram of an embodiment of the present invention, and FIG. 2 shows an enlarged view of its main parts.

An outer tube 2 forming an exhaust path is provided on the outer periphery of a cylindrical conduit 1 that guides the powder filling downward, and a vacuum pump (not shown) is connected to a branch pipe 3 at the upper end of the outer tube 2 via an electromagnetic valve (not shown). vinegar)
is connected to. Above the conduit 1 is a known powder metering device [
4, above which is provided a hopper 5 for storing the powder to be packaged. On the other hand, above the conduit 1, there is a supply roll 6 of a strip film for bag making, and a strip film 10 is supplied from above the conduit 1 and the outer tube 2 to the outer circumference of the outer tube via a dancer roller 7 and a fixed roller 8. The continuous cylindrical body 1 is sealed by the vertical sealing device 9 while surrounding the outer tube.
1 and further sent downward from the lower ends of the conduit 1 and the outer tube 2. The continuous cylindrical body 11 is laterally sealed by a lateral sealing device 12 provided at a position below the lower ends of the conduit 1 and the outer tube 2 to form a bag 14 thereon, and at the same time, a bag 14' below it is sealed. and wrap it. Below the horizontal sealing device 12, there is an intermittent transfer device 13 that clamps the continuous package and pulls it down by a predetermined stroke.
It operates in synchronization with the opening and closing of 2.

As shown in FIGS. 2 and 3, an edge-shaped member 15 with a triangular cross-sectional shape is provided at the lower end of the conduit 1, and this divides the flow of powder dropped from above into two. Since the powder flows and falls into the bag 14 and a space is formed between the two powder streams, the air at the bottom of the bag is quickly exhausted to the outer tube 2. In FIG. 2, arrow A shows the flow of powder, arrow B shows the flow of air in the pocket, and arrow C shows the exhaust route from the outer tube to the vacuum pump.

Further, a ring 16 is fitted around the outer periphery of the lower end of the outer tube 2. This prevents fine powder from entering the next horizontal seal position [17] by narrowing the gap between the outer circumference of the outer tube 2 and the continuous cylinder 10 without increasing the frictional resistance of the continuous cylinder 10. are doing.

Instead of this ring 16, it may be wrapped with tape or formed integrally with the outer tube 2, for example.

Furthermore, when fine powder penetrates upward beyond the ring 16, as a means for removing it, as shown in FIG. The number of ventilation holes 18.18 (may be 7) is formed.

As a modified embodiment of the exhaust path of the present invention, a part of the conduit 1 can be partitioned off with a partition plate, or a thin inner pipe can be inserted from the center of the conduit 1 into the bag.

According to the present invention, as described above, since the flow regulating element is provided at the lower end of the conduit and the exhaust path is formed along the lower end of the conduit, when the powder powder falls into the bag, the air in the bag is quickly removed. At the same time, if even a small amount of fine powder flies up, it will be sucked into the exhaust passage, so it will not contaminate the next horizontal and vertical seal positions (in addition, it will prevent the introduced powder from entering the bag). The settling speed became faster, and according to experiments, it became possible to operate at a high speed of 90 pieces per minute using fine powder.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the entire embodiment of the present invention, FIG. 2 is an enlarged view of the main part of FIG. FIG. 1...Conduit 2...Outside W (exhaust path) 4...Powder measuring device 9...Vertical sealing device 10...Band-shaped film 11...Continuous cylindrical body 12...Horizontal sealing device 13...Intermittent transfer device 15...Edge-shaped member (flow regulating element) 16.
...Ring (ring-shaped protrusion) 18 ...Vent hole Patent applicant Takeda Pharmaceutical Co., Ltd. Representative Patent attorney Nishi 1) New Figure 1

Claims (4)

[Claims] (1) A conduit is provided to guide the powder downward from a measuring device that intermittently measures predetermined amounts of the powder filler, and a strip-shaped film is supplied from the side of the conduit, and the strip-shaped film surrounds the conduit. In this state, the strip film is vertically sealed to form a continuous cylinder, and the continuous cylinder is horizontally sealed to drop the weighed powder filling into the formed bag, and the continuous cylinder is moved downward. In an apparatus for sealing and packaging the fallen powder filler by performing the next horizontal seal with a foreshadowing line displaced by a predetermined length, the lower end position of the conduit is extended below the next horizontal seal position, and the conduit is A cylindrical bag making/packaging characterized in that an exhaust passage communicating with a pressure reduction device is arranged in parallel along the lower end, and a flow regulating element is provided at the lower end of the conduit to warp the flow direction of the powder from the axial direction. Device. (2) The cylindrical bag making and packaging apparatus according to claim 1, wherein the flow regulating element is a device in which an age-shaped member having a triangular cross-sectional shape is provided along the diameter of the conduit. (3) A cylindrical shape according to claim 1 or 2, wherein a ring-shaped convex portion is formed on the outer periphery FcG of the lower end of either the conduit or the exhaust path. Bag making and packaging equipment. (4) The cylindrical bag making and packaging apparatus according to claim 3, wherein a ventilation hole communicating with the exhaust passage is formed near the upper end of the ring-shaped protrusion of the conduit.