JPH11130018A - Apparatus for deaerating inside of bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly and efficiently seal a mouth by carrying a bag in a standing state to reliably deaerate the inside of the bag during transfer and also to close the mouth. SOLUTION: A vertical suction pipe 2 is placed on a horizontal guide member 1 so that it can reciprocate while a movable pipe with a suction nozzle 3 opened downward attached at its lower end is fitted into the vertical suction pipe 2 so that the movable pipe can rise/lower in a predetermined height range. A flat bag D containing an article is mounted in a standing state on a transfer starting end of a carry conveyer C to have the suction nozzle 3 inserted into an upper end opening of the bag D. While the bag D is being carried toward a sealer B in this state, the inside of the bag D is deaerated by suction force of the suction nozzle 3 and a mouth is closed while the vertical suction pipe 2 is moved along the horizontal guide member 1. When the bag D reaches the sealer B, the suction nozzle 3 is separated upward, and then it is returned to an original position together with the vertical suction pipe 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag for removing air inside a synthetic resin bag when sealing the open end of the synthetic resin bag containing various articles and storage boxes inside. It relates to a pneumatic device.

[0002]

2. Description of the Related Art A food, a luxury item, or other small articles, or a box such as a cardboard box containing the articles is stored in a flat synthetic resin bag, and the open end of the bag is sealed with a sealing device. When sealed, the bag is inflated by the air sealed in the bag, which deteriorates the handleability of the bag storing and transporting the articles, and the stored articles may be perturbed in the bag and damaged. There is.

[0003] For this reason, the present applicant has developed a degassing device in a bag as described in, for example, JP-A-59-1332. This deaerator is configured to transport a synthetic resin bag containing articles horizontally on a conveyor, with the open end thereof oriented in a horizontal direction orthogonal to the conveyor transport direction, and to the seal device side. During the conveyance, the opening end of the bag opened in a flat shape by the upper and lower clamping belts is gradually pressed down from above and below, and the opening end of the bag is slid in contact with the suction nozzle arranged on the opening end side of the bag. After the inside of the bag is evacuated by the suction force from the suction nozzle, the bag is sent to the sealing device.

[0004]

However, according to the above-mentioned deaerator, the bag is placed on a conveyor while being laid down to perform deaeration and sealing. When small items are stored, some of the small items move to the open end when the bag is laid down, and even during degassing, the small items are drawn to the open end by the suction force of the suction nozzle. There is a problem that there is a possibility that the sealing may not be performed.

[0005] Such a problem can be solved when the article is put in a cardboard box and then the cardboard box is stored in a bag. In addition, the article is placed on a conveyor with the bag standing upright. In any case, the suction nozzle is fixed at a fixed position in the middle of the conveyance of the conveyor, and the opening end of the bag being conveyed is slid on the end face of the suction port of the suction nozzle. Since the inside of the bag is evacuated while being in contact, the opening end of the bag that is in sliding contact with the end face of the suction port is subjected to the depressurizing effect of the suction force of the suction nozzle before the inside of the bag is sufficiently evacuated. A problem arises in that the opposed end surfaces of the open ends are brought into close contact with each other, so that reliable deaeration cannot be performed.

[0006] In addition, the deaeration by the suction nozzle is configured to be performed only while the bag passes through the suction nozzle. Therefore, in order to sufficiently deaerate the inside of the bag, the transfer of the conveyor is required. The speed must be reduced to increase the sliding time of the opening end of the bag with respect to the suction port of the suction nozzle, and the processing efficiency of the deaeration process and, consequently, the sealing process is reduced, so that it cannot be put to practical use.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and an object of the present invention is to reliably and efficiently deaerate a bag while keeping the articles in a stable storage state in the bag. It is an object of the present invention to provide an in-bag deaeration device.

[0008]

In order to achieve the above object, a bag deaerator according to a first aspect of the present invention comprises: a vertical suction pipe reciprocating in a front-rear direction along a guide member; A movable pipe having an intake nozzle mounted at a lower end protruding downward from the vertical intake pipe so as to be vertically movable into the vertical intake pipe, and a lower end opening of the intake nozzle which is attached to the movable pipe during deaeration. Hold it in the lowered position inserted in the upper end opening of the
After deaeration, the movable tube is raised to move the intake nozzle upward from the opening end of the bag.

In the bag degassing device according to the first aspect, the invention according to a second aspect relates to a movable pipe elevating means, which is perforated in a support fitting integral with the vertical intake pipe. A pin protruding from the lower end of the movable tube is vertically slidably engaged with the vertically elongated hole, and the pin is locked at the lower end of the vertically elongated hole by the weight of the movable tube, thereby moving the movable tube. An up-and-down guide mechanism that holds the descent position at a fixed height, and an opening / closing valve that is disposed on the movable pipe and that raises the movable pipe by suction from the vertical intake pipe side by blocking ventilation in the movable pipe. It is characterized by:

According to a third aspect of the present invention, the valve shaft of the on-off valve is projected outward from the movable pipe so as to be constantly urged in the valve opening direction by a spring force, and the on-off valve is provided at the projecting end of the valve shaft. The proximal end of a lever that pivots in the direction to close the valve is fixed, and the elastic pressure of a flexible intake hose that connects and connects the vertical intake pipe to the vertical intake pipe and the vacuum pump. It is characterized in that the guide member is urged by a force in a direction to move to the front end side of the guide member.

According to a fourth aspect of the present invention, there is provided a structure in which the deaerator is integrated with a sealing device. In the valve closing direction, the lever protrudes horizontally forward from the front surface of the seal device disposed above the horizontal transfer conveyor that conveys the water toward the front and the lever of the open / close valve abuts on the front surface of the seal device. It has a structure in which a contact piece to be rotated and a gap member that guides the open end of the bag that has been degassed on the way of being conveyed on the horizontal conveyor to the sealing heater of the sealing device are protruded.

[0012]

The bag containing the articles is placed on the conveyor below the guide member protruding forward from the sealing device so that the folding direction of both ends thereof is oriented in the front-rear direction. At this time, the bag is placed in a state of standing on the conveyor, so that the article stored in the bag or the box storing the article (hereinafter simply referred to as “article”) is placed on the inner bottom side of the bag. Then, the suction operation by the suction nozzle and the sealing of the opening end of the bag thereafter are reliably performed.

When the bag is placed on the conveyor and the lower end suction nozzle of the movable pipe projecting downward from the vertical suction pipe is inserted into the rear end of the upper end opening of the bag, the bag is sealed by the conveyor. The air in the bag is sucked and removed by the suction nozzle during the conveyance, and the inside of the bag is decompressed and deformed in a direction in which the opposite side surfaces of the bag are attracted to each other. The inside of the bag is sufficiently evacuated while being pressed, so that the opposing inner surfaces on both sides are completely adhered to the opening end.

When the bag thus evacuated reaches the sealing device, the movable tube rises, the suction nozzle is separated upward from the mouth of the bag, and the bag is continuously conveyed to the sealing device by the conveyor. While the open end of the closed bag is sealed by the sealing device, the vertical suction pipe hanging the suction nozzle returns to the original front position along the guide member and waits for deaeration in the next bag. Is what you do.

In the above deaerator, if the pin protruding from the movable pipe is engaged with the vertically long hole formed in the support fitting integral with the vertical suction pipe as described in claim 2, ,
Due to the weight of the movable tube, the pin is locked at the lower end of the vertically long hole, so that the height position of the suction nozzle from the transport conveyor can be kept constant, and the suction nozzle can be accurately positioned in the opening end of the bag with a fixed shape. The bag can be sequentially and smoothly and reliably degassed by being inserted into the bag.

Further, according to the third aspect of the present invention, the movable pipe is provided with an open / close valve for opening and closing the inside of the movable pipe by turning a lever, and the open / close valve is constantly urged in the valve opening direction by a spring force. During deaeration, the intake from the vertical intake pipe side can be reliably applied to the intake nozzle to perform deaeration, and when the open / close valve is closed by the rotation of the lever, the intake on the intake nozzle side is shut off. The deaeration action is stopped, and the movable pipe is drawn upward by the suction force from the vertical suction pipe side, so that the deaerated suction nozzle can be automatically and reliably separated from the opening end of the bag.

In addition, the vertical suction pipe is urged in a direction to move to the front end side of the guide member by elastic pressure of a flexible suction hose connecting and communicating the vertical suction pipe and the vacuum pump. By doing so, it is possible to easily return the vertical intake pipe having the intake nozzle after the deaeration is completed to the original position without providing new return means or the like.

Further, as in the invention described in claim 4,
If the contact piece of the lever of the open / close valve protrudes in front of the seal device, the lever contacts the contact piece and rotates when the bag reaches the seal device by the conveyor while the bag is evacuated by the suction nozzle. Then, the inside of the movable pipe is closed, and as described above, the suction action by the intake nozzle is stopped, and at the same time, the movable pipe moves upward by the suction force from the vertical intake pipe side, and the suction nozzle is detached from the open end of the bag. In addition, since a gap member that guides the mouth of the bag toward the sealing heater is provided in the first half of the sealing device, the degassed bag can be accurately conveyed to the sealing device and sealed. The movable pipe having the suction nozzle raised by the rotation of the lever returns to the original position together with the vertical suction pipe due to the elastic pressure of the suction hose as described above, but at the time of the return, the lever detaches from the contact piece and opens. By opening the valve, the air can be evacuated by the suction nozzle and the movable pipe is lowered by its own weight to a position where the suction nozzle can be inserted into the open end of the bag.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a specific embodiment of the present invention; FIG.
In the figure, A is a degassing device disposed on the front side of the sealing device B, and these degassing devices A and B are the first half of a horizontal conveying conveyor C whose conveying surface runs from the front to the rear. It is arranged above and in the rear half, respectively.

The deaerator A has a guide member 1 consisting of two parallel guide rods 1a and 1b of a fixed length projecting horizontally from the front surface of the sealing device B toward the front. A vertical intake pipe 2 reciprocating in the front-rear direction along with an intake nozzle 3 removably mounted on a lower part of the vertical intake pipe 2 so as to be vertically movable and open downward at a lower end opening. Connecting and communicating between the vertical suction pipe 2 and the vacuum pump 7 with the movable pipe lifting / lowering means including the pipe 4, a lifting / lowering guide mechanism 5 for the movable pipe 4, and an opening / closing valve 6 disposed in the movable pipe 4. And a flexible intake hose 8.

The structure of the deaerator A will be described in more detail.
As shown in FIGS. 3 to 5, the elevation guide mechanism 5 is configured by fixing a flat U-shaped support bracket 52 to a bracket 51 fixed to one side of the outer periphery of the lower end portion of the vertical intake pipe 2. The lower half of the support fitting 52 projects downward from the lower end of the vertical intake pipe 2, and the support fitting 52 faces the vertical intake pipe 2.
A vertically long hole 53 (shown in FIG. 3) is formed in the center of the lower half of the other side surface, and one end of the movable tube 4 projecting downward from the lower end of the vertical intake pipe 2 in the vertically long hole 53. A pin 9 protruding laterally is engaged slidably up and down, and in a normal state, the pin 9 is locked to the lower end of the vertically long hole 53 by the weight of the movable tube 4 and attached to the lower end of the movable tube 4. The suction nozzle 3 is held at a fixed height from the conveyor C.

Further, the guide rod 1a of the guide member 1
1b, a flat U-shaped sliding member 10 is provided.
The upper half of the support bracket 52 is fixed so that the height can be adjusted. The fixing means is provided with longitudinal slits 54 on both front and rear surfaces of the upper half of the support fitting 52, and is aligned with the vertical slits 54 on the upper and lower ends of the front and rear faces of the sliding member 10 superimposed on the front and rear outer surfaces of the support fitting 52. A screw insertion hole 55 is formed, and a tightening screw 56 is inserted through the insertion hole 55 from the front side of the support fitting 52 in the upper and lower portions between the vertically long slits 54, 54, and a nut 57 is provided on the rear surface of the support fitting 52. Is screwed to the tip of the tightening screw 56, and the tightening screw 56 is tightened and loosened to
52 is fixed to the sliding member 10 so that the vertical movement can be adjusted.

The slide member 10 is attached to the guide member 1 by moving the horizontal guide tube 11
The horizontal guide cylinder 11 is slidably fitted to one guide rod 1a of the guide member 1 and the sliding member
The rotators 12, 12 slidably contacting the other guide bar 1 b of the guide member 1 so as to sandwich the guide bar 1 b from above and below are pivotally supported on the guide member 1. The sliding member 10 is configured to be slidable in the front-rear direction.

The on-off valve 6 may be disposed in the lower end of the movable tube 4, but in this embodiment, a block-shaped bearing member 13 is provided at the lower end of the movable tube 4 as shown in FIGS. The on-off valve 6 is disposed on the bearing member 13 by being fixed. That is, a through-hole 14 is provided between the upper and lower end surfaces of the bearing member 13, the lower end of the movable tube 4 is inserted into the upper end of the through-hole 14 and fixed by the screw 33, and the center of the through-hole 14 is formed. The on-off valve 6 is disposed at the bottom. The on-off valve 6 includes a disc-shaped valve element 6a and a valve shaft 6b. The valve element 6a is formed to have a diameter substantially equal to that of the through hole 14, and an air passage in the movable pipe 4 communicating with the through hole 14 is opened. The valve shaft 6b is directed in the diametric direction of the through hole 14 and both ends thereof are rotatably supported on both sides of the bearing member 13, and further project from one side surface of the bearing member 13. The pin 9 which slides up and down in a vertically long hole 53 provided in a support fitting 52 integral with the vertical intake pipe 2 is attached to the protruding end of the valve shaft 6b. The pin 9 is made of a bearing, and the inner race is fixed by fitting the inner race to the protruding end of the valve shaft 6b.

The base end of the lever 15 is fixed to the projecting end of the valve shaft 6b projecting from the other side of the bearing member 13,
The rotation of the valve shaft 15 causes the valve shaft 6b to rotate integrally to open and close the valve element 6a. However, as shown in FIG. Receiving pin projecting from bearing member 13 in a state inclined backward
The spring 17 is supported by the spring 16 and further prevented from rotating downward, and has one end locked to the outer surface of the bearing member 13 and the other end locked to the upper end of the lever 15. It is pressed against the stop pin 16 side, and in this state, the plate surface of the valve element 6a of the on-off valve 6 is directed vertically to open the intake path,
The inside of the movable pipe 4 is communicated with the intake nozzle 3 through the through hole 14.

The intake nozzle 3 is formed in a short cylindrical portion 3a whose upper half is fitted to a cylindrical portion formed at the lower end of the bearing member 13 and is detachably attached to the bearing member 13 with screws 18. On the other hand, the lower half is a flat nozzle opening 3b having a certain length.
The nozzle port 3b is mounted on the bearing member 13 in a state where the parallel flat sides of the nozzle port 3b face the front-back direction. Further, a plurality of crosspieces 19 laid between opposed flat inner surfaces at the lower end of the opening of the nozzle opening 3b.
Are provided at small intervals in the front-rear direction to prevent small articles and the like from being sucked by the suction force into the nozzle opening 3b inserted into the bag when the inside of the bag D is evacuated as described later. It is configured as follows.

Further, a circular ventilation hole 3c is formed in the short cylindrical portion 3a of the intake nozzle 3, and the intake adjusting ring 20 is fitted to the short cylindrical portion 3a so as to be rotatable in the circumferential direction. The intake adjustment ring 20
The suction force of the intake nozzle 3 is adjusted by changing the area of communication between the through hole 21 provided in the nozzle and the vent hole 3c. In addition, as the intake nozzle 3, several kinds of nozzles in which the shape of the flat nozzle opening 3b is formed in a shape corresponding to the material, shape, and size of the bag are prepared.
A desired intake nozzle 3 is configured to be attached to the lower end of the movable pipe 4.

Numeral 22 fixes the upper end to the upper part of the vertical intake pipe 2,
A tension spring whose lower end is fixed to the bearing member 13 attached to the lower end of the movable tube 4 assists the movable tube 4 to be constantly pulled upward in the upward movement direction so that the movable tube 4 can be easily lifted. At the same time as the movable pipe 4 is suppressed from dropping sharply. Reference numeral 23 denotes a cushion ring mounted on the upper end surface of the bearing member 13. The cushion ring 23 is buffered by the ring member 24 mounted on the lower end of the vertical intake pipe 2 when the movable pipe 4 rises, and further moves upward. Is to stop.

As shown in FIG. 5, a stopper member 25 is slidably and fixedly provided at the front of one guide rod 1a of the guide member 1 which supports the vertical intake pipe 2 so as to be slidable back and forth. The position of the vertical suction pipe 2, that is, the deaeration start position by the suction nozzle 3 is set according to the opening width of the bag (width between both end folds). The front opening of the flexible intake hose 8 is connected to the upper end opening of the vertical intake pipe 2 via a joint pipe 26 as shown in FIGS. And the rear end thereof is connected to a suction port of a vacuum pump 7 installed below the rear end of the conveyor C.

The suction hose 8 has its longitudinal middle portion supported by one side surface of the sealing device B, and the length of the supporting portion and the joint pipe 26 is forcibly bent into a U-shape. Thus, an elastic restoring force for restoring the curved portion 8a in the expanding direction is applied to the curved portion 8a, and the elastic restoring force urges the vertical intake pipe 2 in a direction of constantly pushing the vertical intake pipe 2 forward along the guide member 1. The stopper member 24 is brought into contact with and received by the stopper member 24. In addition, as such a returning means of the vertical intake pipe 2 to the front, for example, a string is connected to the vertical intake pipe 2,
The string is hung over a pulley that is pivotally supported by the front end of the guide member 1 and hangs downward. A weight is attached to the lower end of the pulley, and the weight urges the vertical suction pipe 2 in a direction that always pulls the vertical intake pipe 2 forward. You may let it.

On the front surface of the sealing device B, a portion corresponding to the rear of the opening / closing lever 15 of the opening / closing valve 6 is provided.
A contact piece 27 having an inverted L-shape on the side for abutting a shaft body 15a projecting outward from the tip of the intake nozzle 3 is provided.
The gap members 28, 28 protrude forward at a portion corresponding to the rear of the guide member, and a narrow guide passage 29 penetrating in the front-rear direction is formed at opposing inner end faces of the gap members 28, 28 to form the guide. The passage 29 is configured to be passed rearward while being guided while the opening end of the bag D is pinched. The sealing device B is provided with left and right sandwiching belts B1 and B1 formed of endless metal strips, and the opposed sandwiching surfaces thereof are located behind the guide passage 29 between the gap members 28 and 28. The left and right holding belts B1, B1 are circulated and run by a motor (not shown), and a pair of left and right sealing heaters B2 are arranged on the back side of the holding surfaces of the left and right holding belts B1, B1. Has been established.

The sealing device B is supported by columns 30, 30, and the column 30 has a fixed column 31 at the bottom.
In addition, the upper part is formed in the movable support part 32,
The structure is such that the sealing device B is fixed at a desired height position by inserting the fitting 32 into the fixed support portion 31. On the other hand, the horizontal transport conveyor C for transporting the bag D to the sealing device B side
The conveyor surface is constituted by a belt conveyor C1 whose traveling surface runs at a constant speed from the front to the rear by a motor (not shown) except for the front end for supplying the bag D. Roller conveyor with rollers arranged side by side
C2.

After the inside of the bag is evacuated by using the deaerator configured as described above, the sealing is performed by first setting the sealing height position of the sealing device B in accordance with the vertical width of the bag with the support column.
The movable support portion 32 of the vertical lift pipe 30 is moved up and down, and then fixed by being fixed.
The support screw 52 is moved up and down with respect to the sliding member 56 by loosening the tightening screw 56 fixing
Is adjusted so that it can be inserted into the opening end of the bag D, and then the fixing screw 56 is fixed by tightening. On the other hand, the bag D is formed of a flat synthetic resin bag having fold portions D1 and D2 at both front and rear ends, and a stopper member 25 provided on the guide member 1 according to the width of the front and rear fold portions. Is determined, and the deaeration start position by the intake nozzle 3 is set.

When the vacuum pump 7 is operated in this state, the vertical suction pipe 2 is urged forward by the elastic pressure from the suction hose 8 and received by the stopper member 25. 26, suction power is generated at the lower end of the opening of the suction nozzle 3 through the vertical suction pipe 2 and the movable pipe 4. Then, as shown in FIG. 2, the bag D accommodating the article E is set in the upright state, and the upper ends of the front and rear folds D1 and D2 are picked up by hand on the roller conveyor C2 of the transport conveyor C. When the bag D is placed and the suction nozzle 3 is inserted into the front end opening end of the bag D and the bag D is sent out to the belt conveyor C1, the front end side of the opening end of the bag D conveyed by the belt conveyor C1 is folded. The vertical suction pipe 2 which has the front peripheral portion of the suction nozzle 3 in contact with the inner surface of the eye portion D1 and is engaged with the bag D to make the suction nozzle 3 hang down integrally along the guide member 1 To move backwards.

In this way, the bag D is conveyed rearward by the belt conveyor C1 toward the sealing device B, and during and during the conveyance, the air in the bag is sucked by the suction nozzle 3, and the movable pipe 4 causes the vertical suction pipe 2, The bag D is evacuated through the suction hose 8 and the inside of the bag D is evacuated. The air is reduced in pressure by this deaeration, and the flat side surfaces of the bag D are deformed in a direction in which they are attracted to each other. The surfaces facing the open ends of D are in close contact with each other except for the rear end where the intake nozzle 3 is inserted.

The air inside the bag D is completely removed by the suction nozzle 3 before the bag D reaches the sealing device B, and when the bag D is carried into the sealing device B by the belt conveyor C1, the upper end portion of the bag D which is tightly closed. Is the sealing device B from the rear end side
In the state where the guide passage 29 between the gap members 28, 28 protruding from the holding member is held, the holding surface is fed between the left and right holding belts B1, B1 of the sealing device B running at the same speed as the belt conveyor C1, and these are held. It is carried into the sealing heater B2 side while being sandwiched by the belts B1 and B1.

On the other hand, the front end of the bag D is
Immediately before reaching the positions 8 and 28, the tip shaft 15a of the lever 15 provided on the movable tube 4 comes into contact with the contact piece 27 projecting from the sealing device B, and the lever 15 is rotated upward, Due to the rotation, the valve shaft 6b rotates integrally, and the air passage in the movable pipe 4 is closed by the valve body 6a. Then, the suction force to the suction nozzle 3 side is cut off, and the deaeration action in the bag D is stopped, and at the same time, the vacuum suction force from the vacuum pump 7 acts on the movable pipe 4. Simultaneously with the closing of 6a, the upper part of the movable pipe 4 rises into the vertical suction pipe 2 and the suction nozzle 3 is drawn upward from the opening at the front end side of the bag D, and is closed by the suction acting just before the drawing. Bag D
Of the bag D is continuously fed between the sandwiching belts B1 and B1, and the edge of the bag D is fused and sealed (sealed) by the sealing heater B2 over the entire width between the rear end and the front end. F.

After the inside of the bag D is evacuated, the suction nozzle 3 which has risen together with the movable pipe 4 is released from the inner surface of the rear end opening of the bag D, and the vertical suction provided with the suction nozzle 3 The pipe 2 is pushed forward by the elastic pressure of the suction hose 8, is received by the stopper member 25, and waits for deaeration of the bag D containing the next article. The bag D is sent out from the roller conveyor C2 to the side of the belt conveyor C1, and the bag D is evacuated while being conveyed by the belt conveyor C1. Is removed upward from the mouth, and the mouth of the sealed bag D is continuously fed to the sealing device B to perform the seal F.

In the above embodiment, the vertical intake pipe 2 is returned to the original position along the guide member 1 by the elastic force of the intake hose 8 and the weight. 2, a small motor is mounted, and forward and reverse rotation of the motor is transmitted to a rotator rolling on the guide member 1, and the vertical intake pipe 2 is reciprocated at a desired length of the guide member 1. Good. In this case, a switch member for switching the rotation of the motor is provided on the front and rear end sides of the guide member 1, and a mechanism that raises the movable pipe 4 by the operation of the switch member on the seal device B side without using the open / close valve 6. Alternatively, means for electrically closing the on-off valve 6 may be provided.

Further, when the bag D is fed along the guide member 1 to the sealing device B side, the bag D is conveyed while being held by the left and right belt members from both sides thereof without manual operation. By adopting such a configuration and the automatic reciprocating mechanism of the vertical suction pipe 2 driven by the motor described above, deaeration in the bag storing the articles to be sequentially supplied onto the conveyor C and the air after the deaeration are performed. The mouth can be continuously and automatically sealed.

[0041]

As described above, according to the in-bag deaerator of the present invention, the vertical intake pipe reciprocating in the front-rear direction along the guide member, the vertical intake pipe is inserted and vertically movably inserted into the vertical intake pipe, and A movable pipe having an intake nozzle attached to a lower end protruding downward from the vertical intake pipe, and at the time of deaeration, the movable pipe is held at a lowered position where the lower end opening of the intake nozzle is inserted into the upper end opening of the bag. After degassing, the movable tube is raised to move the intake nozzle upward from the opening end of the bag, and the movable tube is moved upward and downward. As a result, the articles and the box housed in the bag are brought to the inner bottom side of the bag, so that there is no article or the like at the mouth side of the bag. Of the bag can be smoothly removed and the bag Le is what can be reliably performed.

Further, since the movable pipe is vertically movably inserted into the vertical intake pipe, the intake nozzle mounted on the lower end of the movable pipe can be easily inserted into the upper end opening of the bag by lowering the movable pipe. In addition, the movable pipe holds its lowered position and the vertical suction pipe is configured to move along the horizontal guide member, so that the suction nozzle is fixed in the upper opening of the bag. The vertical suction pipe moves along with the guide member integrally with the bag when the bag is transported to the sealing device side, so that the bag can be held from the start of the transport of the bag. Until it is carried into the sealing device side, it can be subjected to deaeration by the suction nozzle, and the inside of the bag can be sufficiently deaerated.

Further, as described above, since the inside of the bag is evacuated while the suction nozzle is inserted at a predetermined position in the upper end opening of the bag, the air suction force by the suction nozzle is reduced. It is possible to reliably act on the whole, to efficiently and reliably eliminate air in the bag, and to accurately seal the mouth of the bag other than the insertion portion of the suction nozzle by degassing. In addition, after degassing, the movable tube is raised to lift the suction nozzle upward from the opening end of the bag, so that the inside of the bag is sufficiently degassed until the suction nozzle is released. At the same time, the mouth portion inserted by the suction force of the suction nozzle at the time of detaching upward can be completely closed, and the bag can be securely sealed over the entire width. Then, after the suction nozzle is detached from the mouth of the bag, the vertical suction pipe returns to the original position along the guide member, and can wait for deaeration in the next bag.

According to the second aspect of the present invention, a pin protruding from the movable pipe as the elevating guide mechanism for the movable pipe is vertically slid into a vertically long hole formed in a support fitting integrated with the vertical intake pipe. Since the pins are movably engaged, the pins of the movable tube can be locked at the lower ends of the vertically long holes by the weight of the movable tube, and the height position of the intake nozzle can be kept constant. The suction nozzle can be accurately inserted into the end portion, so that the inside of the bag can be deaerated sequentially and smoothly.

According to the third aspect of the present invention, since the movable pipe is provided with an opening / closing valve for opening and closing the inside of the movable pipe by rotating the lever, and the opening / closing valve is constantly urged in the valve opening direction by a spring force. During deaeration, the intake from the vertical intake pipe can be reliably applied to the intake nozzle to perform deaeration, and when the open / close valve is closed by the rotation of the lever, the intake on the intake nozzle side is shut off and deaerated. The operation is stopped, and the suction pipe from the vertical suction pipe pulls the movable pipe upward, and the deaerated suction nozzle can be automatically and reliably separated from the opening end of the bag.

Further, the vertical suction pipe is urged in a direction to move to the front end side of the guide member by elastic pressure of a flexible suction hose connecting and communicating the vertical suction pipe and the vacuum pump. Therefore, the vertical intake pipe having the intake nozzle after the deaeration is completed can be easily returned to the original position without providing any new return means.

According to the fourth aspect of the present invention, since the contact piece of the lever of the on-off valve protrudes from the front surface of the sealing device, the bag is sealed by the conveyor while the bag is degassed by the suction nozzle. Upon reaching the device, the lever comes into contact with the contact piece and rotates, the inside of the movable pipe is closed, and the intake action by the intake nozzle stops as described above, and at the same time, the movable pipe moves upward due to the suction force from the vertical intake pipe side The suction nozzle can be separated from the opening end of the bag, and a gap member that guides the mouth of the bag toward the sealing heater is provided in the first half of the sealing device. It can be accurately conveyed and sealed to the sealing device side.
Further, the movable pipe having the suction nozzle raised by the rotation of the lever returns to the original position together with the vertical suction pipe due to the elastic pressure of the suction hose as described above. The valve is opened to allow deaeration by the suction nozzle, and the movable pipe is lowered by its own weight to a position where the suction nozzle can be inserted into the open end of the bag to prepare for deaeration in the next bag. it can.

[Brief description of the drawings]

FIG. 1 is a simplified perspective view showing a state in which a bag deaerator according to the present invention is provided on a sealing device on a conveyor.

FIG. 2 is a side view thereof,

FIG. 3 is a front view of a main part of the deaerator,

FIG. 4 is a side view thereof,

FIG. 5 is a plan view crossing a part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide member 2 Vertical intake pipe 3 Intake nozzle 4 Movable pipe 5 Elevating guide mechanism 6 On-off valve 7 Vacuum pump 8 Intake hose 9 Pin 15 Lever 27 Contact piece 28 Gap member

Claims (4)

[Claims] 1. A vertical intake pipe reciprocating in a front-rear direction along a guide member, and an intake nozzle mounted on a lower end of the vertical intake pipe movably inserted vertically and protruding downward from the vertical intake pipe. The movable pipe is held at a lowered position where the lower end opening of the suction nozzle is inserted into the upper end opening of the bag during deaeration, and after deaeration, the movable pipe is raised to close the suction nozzle. And a movable pipe elevating means for detaching upward from the opening end of the bag. 2. A movable pipe elevating means engages a pin projecting from a lower end portion of the movable pipe into a vertically long hole formed in a support fitting integral with the vertical intake pipe so as to be slidable up and down. An elevating guide mechanism for holding the movable tube at a lowered position at a fixed height by locking the pin at the lower end of the vertically elongated hole by the weight of the movable tube; and The in-bag deaerator according to claim 1, further comprising an opening / closing valve that raises the movable pipe by suction force from the vertical intake pipe side by blocking ventilation of the bag. 3. The on-off valve has a valve shaft protruding outward from a movable pipe to be constantly urged in a valve-opening direction by a spring force, and to be closed at a protruding end of the valve shaft. The proximal end of the rotating lever is fixed, and the vertical intake pipe is connected to the vertical intake pipe and the vacuum pump by the elastic pressure of a flexible intake hose connecting and communicating with the vertical intake pipe. 3. The in-bag deaerator according to claim 1, wherein the device is urged in a direction to move toward the front end of the bag. 4. 4. The guide member, which supports the vertical intake pipe so as to be able to reciprocate, moves from the front to the front of a sealing device disposed above a horizontal transport conveyor that transports bags from the front to the rear. A contact piece that projects horizontally and contacts the lever of the open / close valve on the front surface of the sealing device to rotate in the valve closing direction, and a bag that has been degassed during transportation on the horizontal transportation conveyor. The in-bag deaerator according to any one of claims 1 to 3, wherein a gap member that guides the open end toward the sealing heater of the seal device is provided.