JPS62220425A - Valve-mouth section cleaning compensator for packaging bag with valve and automatic mouth sealer for valve mouth section using said 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 (Industrial Field of Application) The present invention provides an automatic packaging bag with a valve having a valve opening at one end of the top and a sealing piece having a hot melt layer for sealing the valve opening. The present invention relates to a mouth sealing device and a device for cleaning and correcting a valve port, which is a main part of the mouth sealing device, using compressed air.

(Prior art) Conventionally, when filling and packaging powder and granular materials such as flour and cement,
The top and bottom are machine sewn or glued.

Packaging bags having a valve opening in a part thereof are often used.

Recently, there has been a demand for sealing the valve opening with adhesive after filling the bag with powder and granules, and for this reason, Nissinpei, which has a hot melt layer on the inner surface, is attached to the valve opening in correspondence with the valve opening. After filling, the valve opening is adhesively sealed by pressing and heating the sealing piece against the valve opening. When sealing the valve port with adhesive, if there is powder that adheres to or accumulates on the valve port or the valve sealing piece, it may not be possible to completely seal the valve port.
Since no adhesion occurs, it is necessary to remove the powder at the valve opening prior to pressure heating.

The present invention relates to a valve opening cleaning and correction device for cleaning the valve opening with compressed air and restoring the inversion of the opening seal that often occurs during this cleaning, and an automatic closing device using the same. It is something.

As a prior document of this kind, there is Japanese Patent Application Laid-open No. 59-2188117 (published on December 10, 1982), which is the applicant's earlier application, but this document shows that the valve opening is not at the top of the bag. This is a closure device for a different type of bag installed on the upper side surface, and when removing powder from the valve opening prior to adhesive sealing by heating, compressed air is injected from one side. The main part is to press the valve opening of the bag from above with a movable inclined presser plate, and then
Press down the base of the valve opening with a movable inclined presser plate, open the tip of the valve opening sufficiently, and inject compressed air with the /zu to remove the powder adhering to the inner surface of the valve opening. This book is fundamentally different from the present invention in its structure.

(Problems to be Solved by the Invention) The present invention provides a method for removing powder and granular material from the valve opening of the valve-equipped package Vit52, in which the valve opening is located at one end of the top of the packaging bag. The valve opening cleaning plate that can spray out water can be used to clean the packaging bags on the conveyor while they are being transferred or momentarily stopped, and when the valve lower ## is being cleaned, it can be reversed and the nine-mouth seal can be restored without stopping the bag transfer. The present invention relates to a mouth sealing device with a completely new configuration, which is characterized by the following features:

(Structure of the Invention) The first invention of this country is a packaging bag with a valve, which is provided with a closure having a hot melt layer on the inner surface in correspondence with a valve opening provided at one end of the top, and is filled with powder. The present invention relates to a device for cleaning and correcting a valve port in a device for sealing the valve port,
Its structure consists of a shaping plate that is installed on the side of the conveyor so that it can rotate horizontally on the conveyor from a position approximately perpendicular to the direction of travel of the conveyor to a position approximately parallel to the direction of travel of the conveyor around a support shaft. On the inner support shaft side of the vertical pipe 0, there is a vertical pipe 0 with a large number of near misses /L/@ installed facing inward, almost parallel to the inner surface of the shaping plate, and a downward air nozzle (
15) and arranging the valve port cleaning plate (10),
It is characterized in that an outward air nozzle (22) is provided above the front conveyor so as to be perpendicular to the direction of movement of the conveyor.

A second invention of the present application relates to an automatic sealing device for packaging bags with a valve, the main part of which is the above-mentioned device for cleaning and correcting the valve opening. ■In addition, a bag detection switch (8) is provided in front of this.
), and furthermore, on the side of the conveyor in front of it, there are numerous near misses/near misses on the inner surface of the shaping plate @, which is rotatable at a fixed angle in the horizontal direction so as to appear and retract on the conveyor around the spindle. Vertical pipe with L/(10) facing inward (
14) and a downward near miss in front of this upper part /l/(8)
A valve cleaning plate (10) is provided, and a near-miss Iv@ facing outward is provided at the lower end approximately in the center of the conveyor in front of the nine-mouth seal correction arm (10), the lower end of which can swing back and forth. In addition, a bag detection switch (24) and a bag holding roller (10) are provided in front of the bag detection switch (24), and a heating plate (27) that moves in the same manner as the valve opening sweep plate (24) is provided on the side of the conveyor in front of the bag detection switch (24) and a bag holding roller (10). It is characterized in that the cooling plates (10) are sequentially arranged at regular intervals.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 8 is a perspective view of the valve-sealing packaging bag ■ to which the present invention is applied.
■ is a valve opening provided at the top, ■ is a nine-mouth seal attached to the top surface corresponding to the valve opening, and a hot melt layer ■ is provided on the inner surface of this mouth seal. be.

FIGS. 1 and 2 are a plan view and a side view of a mouth sealing device according to the present invention, and ▪ indicates a belt conveyor.

This conveyor is separated into multiple parts in drawing Jlc, but this makes it easier to control and adjust each one by performing various operations required for automatic sealing on separate conveyors. It may be one continuous conveyor.

■ is a pressurizing shaping lobe installed at the upper part of the upstream side (rear) of the conveyor, which is forcibly driven to be in the same position as the lower conveyor ■, and the filling method packaging bag ■ on the conveyor is pressed under a constant pressure by the spring ■. Pressure shaping is performed at. ■ is a bag detection switch installed above the conveyor on the downstream side (front) of the pressure shaping lobe. By keeping the tip of the switch lever ■ facing the bag passage space, it is activated when bags pass. This actuates the valve opening cleaning plate (10) located at the front. As shown in Fig. 4, the valve port cleaning plate [phase] cleans the conveyor from a position almost perpendicular to the direction of travel of the conveyor using an air cylinder around a support shaft (■) installed vertically on the side of the conveyor. A large number of air nozzles A1 (13) are installed parallel to the inner surface of the shaping plate along the axis on the inner shaft side of the shaping plate @, which is installed to be able to rotate horizontally on the conveyor to a position almost parallel to the direction of travel. A vertical pipe facing inward ■ and a downward air nozzle (13) in front of this upper part.
It is equipped with the following. This valve cleaning plate is connected to the tip of the air cylinder 〇〇 rod [phase] through the t < -@ shown in Fig. It can be rotated approximately 9G' to a position perpendicular to the conveyor shown by the line. In addition, this air cylinder is equipped with a reed switch [phase], and when the valve opening cleaning plate that protrudes from the VC orthogonal to the conveyor is moved back a little as shown by the dashed line as the bag ■ advances, the reed switch is activated. After activating the switch and stopping the conveyor, as shown in Figures 4 and 6, while squirting compressed air from both nozzles, slowly rotate the valve opening cleaning plate forward at a fixed angle (approximately 5 degrees) to clean the valve. After cleaning the mouth with compressed air, a timer causes the air to quickly escape to the position indicated by the solid line on the side of the conveyor.

[Phase] is a closure correction arm, which is supported by a pin above the center of the conveyor so that it can swing forward from a vertical position, and an air nozzle is installed at its lower end toward the outside, that is, toward the valve opening of the packaging bag. A/[phase] is provided, and this arm is normally biased toward the upstream side of the conveyor by a spring [phase]. The lower end of the seal correction arm is located near the surface of the conveyor, and as the packaging bag advances, it moves upward from the tip of the bag by the action of a spring while being in contact with the nozzle. By blowing compressed air along the top surface of the bag, the seal piece (2), which was turned over by the nozzle (phase) in the previous step as shown in FIG. 7, is returned to its original state.

Note that the above-mentioned outward air nozzle /I/@ does not necessarily need to be provided at the tip of the mouth seal correction arm [phase] as in the above embodiment, but may be provided at a certain location facing the valve opening. Alternatively, it may be provided at the tip of an appropriate arm that descends when necessary.

The above-mentioned valve opening cleaning plate (24), outward air nozzle (24), and cleaning/correcting device for the valve lower part are constructed.

[Phase] is a bag detection switch provided in front of the seal correction arm, and is used to keep the tip of the switch lever [Phase] facing the bag passage space. [Phase] is a bag holding lobe which is lowered in response to a signal from the bag detection switch and transfers the bag (2) while pressing it onto the conveyor.

[Phase] is a heating plate, which is provided so as to be rotatable at a fixed angle in the horizontal direction between the top and the side of the conveyor, centering on a support shaft (10) provided vertically on the side of the conveyor. This heating plate also has a lever (10) similar to the above-mentioned shaping plate 0.
It is connected to the tip of the rod [phase] of the air cylinder [phase] via the air cylinder [phase], and is tensioned perpendicularly to the conveyor traveling direction as shown by the chain double-dashed line by the signal from the bag detection switch [phase] on the upstream side. The cleaned valve opening of the packaging bag is brought into pressure contact with the valve opening of the packaging bag, thereby heating and activating the hot melt layer of the opening seal and simultaneously adhering it. In this heating plate [phase], the reed switch [
Similar to the above-mentioned shaping plate, when the heating plate is returned a little, the conveyor is temporarily stopped (about 1 second), and after heating, pressurization, and adhesion are performed, the conveyor is quickly turned off by a timer function. It is designed to escape to the side.

[Phase] is a cooling plate, which also has the same support structure as the heating plate, and is extended onto the conveyor at the same time as the heating plate by the signal from the bag detection switch [Phase], and after that, the bags are moved while the bags are in progress. After cooling the valve opening, it quickly escapes to the side of the conveyor.

In the above-mentioned embodiment, the conveyor is configured such that the valve opening cleaning plate (24) provided on the side of the conveyor and the heating plate [phase] downstream thereof can be individually stopped temporarily when the conveyor is activated. Although they are provided separately, a single conveyor may be used as long as the valve opening cleaning plate and the heating plate are operated at the same timing. In addition, the device of the illustrated embodiment is used for 1 hour (#)
It is designed to have a sealing capacity of 1,200 bags, but if this capacity can be reduced and the conveyor speed can be slowed down, the conveyor can be temporarily stopped when cleaning the valve opening or performing heat pressure welding. There's no need.

In Figure 1, [phase] is a support frame for attaching each member on the conveyor, [phase] is a cover, and [phase] is a guide plate provided on both sides of the conveyor.

The above description describes the overall configuration of the automatic sealing device, but the main parts of the present invention are the valve cleaning plate and the outward facing valve for repairing the sealing piece, which are carried out prior to heating the sealing device. This patent consists of a valve opening cleaning and repairing device that consists of a combination with an air nozzle p, and this part alone can be claimed as a right.

(Operation) By the powder filling device, the packaging bag ■ filled with powder through the valve opening ■ is sent by the conveyor with the valve opening ■ located at the front left side as shown in Figure 5. come. At the beginning of the transfer, the bag is transferred by the rear loading detection switch ■ which is pressed against the conveyor ■ by the pressure shaping roller ■, and the unevenness of the internal powder and granules is corrected, and the upper and lower surfaces are pressurized and shaped to be flat. is confirmed, a signal is issued and the air cylinder 〇 causes the valve Y# sweep plate (10) to extend orthogonally above the conveyor as shown by the two-dot chain line in Fig. 1. The bag is a valve cleaning plate [phase]
After making contact with the cylinder, it advances a little as shown by the chain line (approximately 5 degrees) and when a certain pressure is applied, the reed switch [phase] of the cylinder is activated and temporarily stops the conveyor ■ and the pressure shaping roller (8). .

After that, as shown in Figures 4 and 6, the inward air nozzle /l/(24) of the vertical pipe ■ and the downward air nozzle /I of the upper part
/ While blowing out compressed air from the [phase], rotate the valve opening cleaning plate (10) forward (approximately 5 degrees) as the cylinder loosens the air.
During this time, the powder at the valve opening is scattered and removed, and after that, the jetting from the nozzle is stopped and the powder quickly escapes to the side of the conveyor. At this time, the compressed air from the inward air nozzle [phase] acts to flip the mouth seal ■ from the valve opening, so the mouth seal is inverted in most cases as shown in Figure 7. The mouth seal is.

Next, the nozzle is brought into contact with the tip of the seal correction arm [phase] placed in front of it, and the nozzle is While the bag is gradually pushed up along the front side, the compressed air restores the opposite side of the bag so that it aligns with the original valve opening.

Subsequently, when the bag detection switch [phase] in front of the bag is activated, the heating plate (24) and the cooling plate [phase] in front of the side of the conveyor are simultaneously stretched orthogonally on the conveyor as shown by the chain line in FIG. The bag that has been taken out and transferred advances forward while being pressed by the bag presser loaf [phase], and its valve opening is connected to the heating plate (24
) and pause for a short time (about 1 second) to activate the hot melt layer (2) on the back side of the opposite bank and at the same time bond it to the valve opening. After the sealing piece is brought into close contact with the valve opening by this heating plate, it quickly escapes to the side of the conveyor, and one bag is sent forward and comes into contact with the cooling plate at the end of the bag, cooling the adhesive layer and opening the valve. Ensure that the mouth is sealed securely.

(Effects of the Invention) As described above, the present invention, after filling the powder or granular material through the valve opening provided at one end of the top of the packaging bag, converts the valve opening into a sealing piece having a hot melt layer on the back side. When automatically heating, pressurizing, and sealing using a valve, the valve opening cleaning plate, which is integrated with the shaping plate and has inward and downward air nozzles, can clean the valve opening in an extremely short time while being transferred on a conveyor. In addition to cleaning the powder and granules adhering to the parts, the inverted sealing piece was restored and corrected, and the subsequent sealing work by heating and pressurization was performed reliably. This has the effect that the valve port can be completely and reliably sealed by the melt layer.

In addition, while the closure of the valved packaging bag filled with powder and granular material is transferred linearly on the conveyor, the valve opening and the hot melt layer are cleaned and heated.

A valve opening cleaning plate that performs a series of sealing operations, such as adhesion and cooling, is extended above the conveyor in a direction perpendicular to the direction of movement of the conveyor, using a support shaft provided vertically on the side of the conveyor as a fulcrum.
By using a heating plate, a cooling plate, etc., the processing capacity could be significantly increased to 1,200 bags per 91 hours, which enabled faster processing.

Furthermore, since the groove structure is simple, there were almost no problems during prototype testing, making it highly applicable to industry.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic plan view of an automatic mouth sealing device, and FIG. 2 is a side view of the same. Fig. 8 is a perspective view of a packaging bag with a valve, Fig. 4 is a partial perspective view of a valve opening cleaning plate, Fig. 6 is a partial plan view of the packaging bag in the initial stage of being transferred by a conveyor, and Fig. FIG. 7 is a partial plan view of the valve opening in a state in which it is in pressure contact with the valve cleaning plate, and FIG. 1. Valve port 21 Port seal tip Hot melt layer 6. Conveyor 6. Pressure shaping roller 8.2 to bag detection switch 10. Valve port cleaning plate 12-shaping plate 1B, 15. Air Noz/I/14. vertical pipe 1
7, 80. Air cylinder 204lo Seal correction arm 2z air nozzle/l/ 26. Bag holding roller 27.
Heating plate 88, cooling plate

Claims (1)

[Claims] 1) Provided on the side of the conveyor so that it can rotate horizontally on the conveyor from a position substantially perpendicular to the direction of travel of the conveyor to a position substantially parallel to the direction of travel of the conveyor about a support shaft. A vertical pipe (14) is provided with a large number of air nozzles (13) facing inward almost parallel to the inner surface of the shaping plate (12), and a downward air nozzle (15) is disposed in front of the upper part of the vertical pipe (14). ) is disposed, and an outward air nozzle (22) is provided above the conveyor in front of this plate, and the inward air nozzle (13)
A valve opening cleaning and repairing device for an automatic closing device for a packaging bag with a valve, characterized in that the opening sealing piece that has been inverted by the air nozzle (22) is returned to its original state. 2) In a device that seals the valve port after filling powder into a valved packaging bag which is provided with a closure piece having a hot melt layer on the inner surface in correspondence with a valve port provided at one end of the top, A pressure shaping roller (6) is provided at the upper center of the conveyor, and a bag detection switch (8) is provided in front of the pressure shaping roller (6), and a bag detection switch (8) is provided on the side of the conveyor in front of the pressure shaping roller (6). A vertical pipe (14) with a large number of air nozzles (13) facing inward is mounted on the inner shaft side of the shaping plate (12), which is provided so as to be rotatable at a certain angle in the direction, and a downwardly facing air nozzle (15) is located in front of the upper part of the vertical pipe (14). ) and a valve opening cleaning plate (10) with a valve opening cleaning plate (10) equipped with A movable valve opening cleaning and correction device is disposed, and a bag detection switch (24) and a bag holding roller (26) are provided in front of the device, and the valve opening cleaning plate (10) is provided on the side of the conveyor in front of the device. 1. An automatic sealing device for a packaging bag with a valve, characterized in that a heating plate (27) and a cooling plate (33) which move in the same manner as in ) are sequentially arranged at regular intervals.