JPH0617683Y2 - Device for cleaning and correcting valve opening of packaging bag with valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an automatic packaging bag with a valve having a valve opening at one end of the top and a mouthpiece having a hot melt layer for sealing the valve opening. The present invention relates to a sealing device.

(Prior art) Conventionally, when packing and packaging powders such as wheat flour and cement,
The top and bottom are sewn or glued on a sewing machine, and a packaging bag having a valve opening in a part thereof is often used. It has recently been demanded to seal the valve mouth with adhesive after filling the bag with the powder and granules. For this reason, a mouthpiece having a hot melt layer on the inner surface corresponding to the valve mouth is required. Has been developed, and after filling, the sealing piece is pressure-contacted with the valve opening and heated to adhere and seal the valve opening. In the case of adhesion and sealing of this valve opening, if there is powder or granules adhered to or accumulated on the valve opening or the sealing piece, complete sealing and bonding will not be performed, so the powder or granules in the valve opening will be in advance of pressure welding. Need to be removed.

The present invention relates to a valve-mouth cleaning / correcting device that cleans the valve-mouth with compressed air as described above and restores the reversal of the sealing piece that often occurs during this cleaning.

As a prior art material of this type, Japanese Patent Application Laid-Open No. 59-218837 (Dec.
(Open on 0th), but this is a sealing device for a different type of bag in which the valve opening is provided not on the top of the bag but on the upper side surface, and is performed prior to adhesive sealing by heating. Even when removing powder particles at the valve opening, it is done by only injecting compressed air from one side.The main part is to push the valve opening of the bag from above with the movable tilt presser plate and then move it to the movable tilt. The point is to press the base of the valve opening with the presser foot plate, fully open the tip of the valve opening, and inject compressed air with the nozzle to remove the powder particles attached to the inner surface of the valve opening. There is a fundamental difference in the configuration from the present invention.

(Problems to be solved by the invention) In the present invention, when the powder particles at the valve mouth of the valve-equipped packaging bag having the valve mouth at one end of the top of the packaging bag are removed, compressed air is simultaneously applied from the side and the top. Depending on the time of cleaning the valve mouth that can spout, the packaging bag on the conveyor is being transferred or while it is momentarily stopped, and the mouthpiece flipped over to the valve cleaning plate can be restored without stopping the bag transfer. The present invention relates to a completely new structure of the sealing device.

(Structure of the Invention) According to the invention of the present application, a valve-equipped packaging bag having a mouthpiece having a hot-melt layer on the inner surface corresponding to the valve mouth provided at one end of the top is filled with powder and granules, and then the valve is sealed. The present invention relates to a valve mouth cleaning correction device in a device for sealing a mouth, the configuration of which is on a side portion of a conveyor, from a position substantially orthogonal to a traveling direction of the conveyor about a support shaft to a traveling direction of the conveyor. A large number of air nozzles 13 are provided on the inner surface supporting shaft side of the shaping plate 12 that is horizontally rotatably provided on the conveyor to the parallel position.
A vertical pipe 14 provided inwardly in parallel with the inner surface of the shaping plate, and a valve opening cleaning plate 10 having a downward air nozzle 15 in front of the upper part thereof. The air nozzle 22 facing outward is provided so as to be orthogonal to the direction.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a perspective view of a valve-equipped packaging body 3 to which the present invention is directed, wherein 1 is a valve opening provided at the top, and 2 is a sealing piece attached to the top surface corresponding to the valve opening. The hot melt layer 4 is provided on the inner surface of the sealing piece.

1 and 2 are a plan view and a side view of the sealing device according to the present invention, and 5 is a belt conveyor. This belt conveyor is divided into a plurality in the drawing, but this is for facilitating each control adjustment by performing various work required for automatic sealing on separate conveyors, It may be one continuous conveyor.

Reference numeral 6 denotes a pressure shaping roller provided on the upstream (rear) upper side of the conveyor, which is forcibly driven to have the same peripheral speed as the lower conveyor 5, and a fixed pressure is applied to the filled packaging bag 3 on the conveyor by a spring 7. It is pressure-shaped at. Reference numeral 8 denotes a bag detection switch provided on the downstream side (front side) of the pressure shaping roller above the conveyor. By allowing the tip of the switch lever 9 to face the passing space of the bag, the bag detection switch 8 is operated when passing the bag. The valve opening cleaning plate 10 arranged in the front is operated. As shown in FIG. 4, the valve port cleaning plate 10 has an air cylinder centered on a support shaft 11 vertically provided on the side of the conveyor, and an air cylinder is used to move the valve opening cleaning plate 10 from a position substantially orthogonal to the direction of the conveyor. A shaping plate 1 that is horizontally rotatable on a conveyor to a position substantially parallel to
A vertical pipe 14 provided with a large number of air nozzles 13 on the inner surface of the inner surface of 2 in parallel with the inner surface of the shaping plate along the axis.
A downward air nozzle 15 is provided in front of this upper part. This valve port cleaning plate is connected to the tip of the rod 18 of the air cylinder 17 via a lever 16 as shown in FIG. 1, and is driven by the air cylinder so as to be orthogonal to the conveyor indicated by the chain double-dashed line from the side of the conveyor. It can be rotated by about 90 ° to the position. Further, this air cylinder is provided with a reed switch 19, and when the valve opening cleaning plate projecting orthogonally with respect to the conveyor is returned a little as shown by the alternate long and short dash line as the bag 3 advances, the reed switch is turned on. After operating and stopping the conveyor, the valve opening cleaning plate is slowly rotated forward by a certain angle (about 5 °) while ejecting compressed air from both nozzles as shown in FIGS. 4 and 6. After cleaning with compressed air, the function of the timer makes it possible to quickly escape to the position indicated by the solid line on the side of the conveyor.

Reference numeral 20 denotes a mouthpiece correction arm, which is pivotally supported by a pin 21 above the center of the conveyor so as to be swingable from a vertical position to the front, and has an air nozzle 22 at the lower end thereof toward the outside, that is, toward the valve mouth side of the packaging bag. It has a spring 2
3 is always urged to the upstream side of the conveyor. The lower end of this mouthpiece correction arm is located near the surface of the conveyor, and as the packaging bag advances, the compressed air is blown from the nozzle through the nozzle while moving upward from the lower end of the bag by the action of the spring 23. By spraying along the top surface, the mouthpiece 2 that has been inverted as shown in FIG. 7 by the nozzle 13 in the previous step is returned to its original state.

The outward air nozzle 22 does not necessarily have to be provided at the tip of the mouthpiece correction arm 20 as in the above-described embodiment, and may be provided at a certain position toward the valve opening. Alternatively, it may be provided at the tip of an appropriate arm that descends when necessary.

Then, the valve opening cleaning plate 10 and the air nozzle 22 facing outward
A valve-portion cleaning correction device is constituted by and.

Reference numeral 24 is a bag detection switch provided in front of the sealing piece correction arm, and the tip of the switch lever 25 is made to face the bag passing space. Reference numeral 26 is a bag pressing roller which lowers the bag 3 in response to a signal from the bag detection switch and transfers the bag 3 while pressing it on the conveyor.

Reference numeral 27 denotes a heating plate, which is provided so as to be horizontally rotatable around a support shaft 28 vertically provided on a side portion of the conveyor and a side portion on the conveyor at a constant angle. Like the shaping plate 12, the heating plate is also connected to the tip of the rod 31 of the air cylinder 30 via the lever 29, and the signal from the bag detection switch 24 on the upstream side causes the heating plate to move like a two-dot chain line. The hot melt layer of the plugging piece is heated and activated at the same time as the hot melt layer of the sealing piece is adhered at the same time by projecting it so as to be orthogonal to the traveling direction and compressing the cleaned valve opening of the packaging bag. Also in this heating plate 27, the reed switch 32 is provided in the air cylinder, and like the shaping plate, when the heating plate is slightly returned, the conveyor is temporarily stopped (about 1 second) to heat, pressurize, and bond. After performing the above, the timer function allows quick escape to the side of the conveyor.

Reference numeral 33 denotes a cooling plate, which also has a supporting structure similar to that of the heating plate. The cooling plate 33 projects on the conveyor at the same time as the heating plate in response to a signal from the bag detection switch 24, and thereafter, while the bag is in progress, the valve opening of the bag. After being pressed and cooled, it quickly escapes to the side of the conveyor.

In the above-described embodiment, the valve opening cleaning plate 10 provided on the side of the conveyor and the conveyor are separately provided so that the conveyor can be temporarily stopped during the operation of the heating plate 27 on the downstream side. However, this may be a single conveyor if the operation timings of the valve opening cleaning plate and the heating plate are matched. Further, although the device of the illustrated embodiment is designed to have a mouth-capping capacity of 1200 bags per hour,
As long as this ability can be reduced to slow down the conveyor speed, it is not necessary to stop the conveyor at the time of cleaning the valve opening or heating and pressure welding.

In the figure, 34 is a support frame for mounting each member on the conveyor, 35 is a cover, and 36 is a guide plate provided on both sides of the conveyor.

The main part of the present invention resides in a valve opening cleaning / correcting device consisting of a combination of a valve opening cleaning plate and an outward air nozzle for correcting the sealing piece, which is performed prior to heating and sealing. But it is a property that can be a right.

(Operation) The packing bag 3 filled with the powder and granules from the valve mouth 1 by the powder and granule filling device is sent by the conveyor with the valve mouth 1 being positioned at the front left side as shown in FIG. . At the initial stage of the transfer, the pressing and shaping roller 6 presses the conveyor 5 to correct the deviation of the powder particles inside and the upper and lower surfaces are pressed and shaped to be flat, and then the bag is transferred by the bag detection switch 8. Is confirmed, a signal is emitted to cause the air cylinder 17 to project the valve port cleaning plate 10 orthogonally in advance on the conveyor as indicated by the chain double-dashed line in FIG. After the bag comes into contact with the valve opening cleaning plate 10 and advances a little as shown by the alternate long and short dash line (about 5 °) and a constant pressure is applied, the reed switch 19 of the cylinder operates to move the conveyor 5 and the pressure shaping roller 6 together. Pause.

Thereafter, as shown in FIGS. 4 and 6, while the compressed air is ejected from the inward air nozzle 13 of the vertical pipe 14 and the downward downward air nozzle 15 of the vertical pipe 14, the valve opening cleaning plate 10 is slowly rotated forward by the cylinder (about (5 °), the powder particles at the valve mouth are scattered and removed, and then the ejection from the nozzle is stopped to quickly escape to the rear of the conveyor. At this time, the compressed air from the inward air nozzle 13 is discharged. Since the sealing piece 2 acts so as to turn over from the valve opening, the sealing piece is almost always inverted as shown in FIG. 7, but the inverted sealing piece 2 is
Subsequently, the mouthpiece correction arm 20 disposed in front of the arm 20.
While ejecting the compressed air from the nozzle 22 to the tip of the bag, while the nozzle is gradually pushed up along the front surface of the bag due to the advance of the front surface of the bag, the compressed air causes the sealing piece to return to the valve opening. It is restored and modified so that it follows.

Then, when the bag detection switch 24 in front of it operates,
The heating plate 27 and the cooling plate 33 in front of the side of the conveyor simultaneously project orthogonally on the conveyor as shown by the chain line in FIG.
The transferred bag moves forward while being pressed by the bag pressing roller 26, and its valve opening is pressed against the heating plate 27 and stopped for a short time (about 1 second), and the backside of the sealing piece is hot. The melt layer 4 is activated and, at the same time, adhered to the valve opening. After the mouthpiece is brought into close contact with the valve opening by this heating plate, it quickly escapes to the side of the conveyor, the bag is sent forward and abuts against the cooling plate 33 at the end of the bag to cool the adhesive insert to cool the valve opening. Secure the seal of.

(Effects of the Invention) As described above, the present invention fills a granular material through a valve opening provided at one end of the top of a packaging bag, and then the valve opening is provided with a sealing piece having a hot melt layer on the back surface. When automatically heating, pressurizing and sealing by utilizing the valve opening cleaning plate equipped with inward and downward air nozzles integrally with the shaping plate, the valve opening can be extremely short during transfer on the conveyor. Since the powder and granules adhering to the part are cleaned and removed, and the inverted sealing pieces are restored and corrected, the sealing work by subsequent heating and pressurization is performed reliably, so that the hot melt There is an effect that the valve mouth portion can be completely and surely sealed by the layer.

In addition, a series of sealing operations including cleaning of the valve mouth and the hot melt layer, heating, bonding, and cooling are performed while the mouth of the valve-equipped packaging bag filled with the granular material is linearly transferred by the conveyor. High speed is achieved by using a valve opening cleaning plate, heating plate, cooling plate, etc. of a type in which a vertical support shaft provided on the side of the conveyor is used as a fulcrum to project on the conveyor in a direction orthogonal to its traveling direction. As a result, the processing capacity per hour was significantly improved to 1200 bags.

Further, since the structure is simple, there are few troubles even in the trial test, and the industrial utilization is high.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a schematic plan view of a valve mouth portion cleaning / correcting device, FIG. 2 is a side view of the same, and FIG. FIG. 5 is a partial perspective view of the valve opening cleaning plate, FIG. 5 is a partial plan view of a packaging bag at an initial stage transferred by a conveyor, and FIG. 6 is a partial plan view of the bag in a state of being pressed against the valve opening cleaning plate. FIG. 7 is a partial plan view of the state in which the sealing piece is inverted. 1 ... Valve mouth, 2 ... Sealing piece, 4 ... Hot melt layer, 5
...... Conveyor, 6 ...... Pressure shaping roller, 8, 24 …… Bag detection switch, 10 …… Valve cleaning plate, 12 …… Shaping plate,
13, 15 ... Air nozzle, 14 ... Vertical pipe, 1
7, 30 ... Air cylinder, 20 ... Sealing piece correcting arm, 22 ... Air nozzle, 26 ... Bag pressing roller, 27
... Heating plate, 38 ... Cooling plate

Claims (1)

[Scope of utility model registration request] 1. A shaping plate provided on a side of a conveyor so as to be horizontally rotatable on the conveyor from a position substantially orthogonal to the traveling direction of the conveyor about a support shaft to a position parallel to the traveling direction of the conveyor. A vertical pipe 14 provided with a large number of air nozzles 13 on the inner support shaft side of 12 inwardly in parallel with the inner surface of the shaping plate, and an air nozzle 15 facing downward in front of the upper portion.
With the valve opening cleaning plate 10 provided with the above, an outward air nozzle 22 is provided above the conveyor in front of this, and the sealing piece reversed by the inward air nozzle 13 is restored by this air nozzle 22. A valve mouth portion cleaning / correcting device for an automatic mouth-sealing device for a packaging bag with a valve, characterized by being returned.