JP2002019728A - Deaerating-cum-gas-filling device for inside of bag in mouth sealing machine for bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deaerating-cum-gas filling device for the inside of a bag in a mouth sealing machine for the bag wherein the deaeration for the inside of the bag housing a food or a one's favorite food or the like and the filling of a gas in the bag can be smoothly and surely performed by one nozzle. SOLUTION: A nozzle which communicates with a vacuum pump and a gas cylinder through piping is fitted in the front end of a nozzle attaching member. At the same time, the nozzle-attaching member is longitudinally movably supported by a movable frame, and the nozzle is inserted in the mouth section of the bag under a state wherein the nozzle is projected forward. Under this state, the movable frame is moved to a pinching belt side. Thus, the deaeration for the inside of the bag and the filling of a gas in the bag are performed while the nozzle is pinched by the pinching belt together with the mouth section of the bag. Then, the mouth section of the bag is sealed. In the meantime, the nozzle is retracted, and moved to the original location while keeping the retracting posture. Then, the nozzle is projected forward at the original location, and is made to stand by for the next work for the constitution of this deaerating-cum-gas-filling device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing machine for automatically sealing a mouth portion of a bag containing powdery or granular foods or the like therein, which is conveyed to a device for sealing the bag. Evacuation of the bag and filling of the bag with a gas such as nitrogen gas, or both of them, or deaeration and gas filling in the bag at the mouth sealing machine for the bag. It concerns the device.

[0002]

2. Description of the Related Art Conventionally, as an automatic sealing machine for evacuating the inside of a bag containing articles such as foodstuffs and luxury goods and then sealing the mouth of the bag, for example, Japanese Unexamined Patent Publication No. Sho 59-1332. 2. Description of the Related Art There is known a sealing machine described in a gazette or Japanese Patent Laid-Open No. 11-130018. Each of these sealing machines is provided with a degassing means and a sealing means, and after the air in the article storage bag conveyed by the conveyor is removed by the degassing means, the mouth of the bag is held by the holding belt. The bag is continuously fed into the sealing means to seal the mouth of the bag.

[0003] In such a sealing machine, the structure of the deaeration means is such that in the former, a pair of upper and lower clamping belts are vertically separated from each other at a gripping start end, and a fixed deaeration nozzle faces the separated portion. The bag is degassed in the bag by the suction force from the degassing nozzle while moving the mouth opening end of the bag along the opening end of the degassing nozzle, and then sent to the sealing means side. In the latter, a movable pipe equipped with a deaeration nozzle opened downward at the lower end is disposed above and below the conveyor start end side so as to be able to move up and down freely on the moving frame, and the moving frame is moved right and left. The bag is set up so as to be able to reciprocate toward the pair of holding belts, the bag is raised, and the bag is moved toward the holding belt on the conveyor with the deaeration nozzle inserted into the mouth of the bag. Air nozzle Therefore After evacuating the interior of the bag, by increasing the dehydration gas nozzle is detached from the mouth portion of the bag, and configured to carry the sealing means side by sandwiching the mouth section by pinching the belt.

[0004]

However, in the former deaeration means, the inside of the bag is evacuated while the opening end of the bag is in sliding contact with the opening end of the fixed deaeration nozzle. In addition to the inefficiency that the suction force from the deaeration nozzle cannot act on the deaeration inside the bag, not only the efficiency is low, but also the case where the mouth of the bag is closed due to the suction force and the deaeration operation may not be performed. There is a problem.

[0005] Such a problem can be solved by inserting the deaeration nozzle into the mouth of the bag as in the latter case. However, according to the latter method, the deaeration nozzle is placed upright on a conveyor. The mouth is bent before the bag reaches the holding belt, and it becomes difficult to pinch the bag with the holding belt accurately.Therefore, the deaeration nozzle is inserted into one end of the mouth of the bag, and the bag is locked. It is necessary to perform a work of feeding the holding belt side while grasping the other end by hand.

Further, in any of the above-described degassing means, immediately after degassing by the degassing nozzle, a part of the mouth of the bag is not pinched by the pinching belt, and during that time, the outside air enters the bag. There is a problem that it becomes impossible to completely deaerate after entering. In addition, depending on the articles stored in the bag, it is necessary to fill a gas such as nitrogen gas to suppress the occurrence of mold and enable long-term storage. In this case,
Gas must be injected and filled into the bag using a gas filling machine separately from the above-mentioned sealing machine, and the work requires a great deal of labor and labor, and the bag is completely degassed. There were problems such as difficulty in filling the bag with gas.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to reliably and efficiently deaerate a bag in which articles are stored and to simultaneously remove the gas into the bag. It is an object of the present invention to provide an apparatus for degassing and filling gas inside a bag in a bag mouth sealing machine which enables filling only with gas without filling or degassing.

[0008]

In order to achieve the above object, a degassing and gas filling device in a bag in a bag sealing apparatus of the present invention is transported by a conveyor as described in claim 1. In a sealing machine configured to seal the mouth of the bag by a sealing device disposed in parallel with the sandwiching belt while nipping the mouth of the bag to be sandwiched by the sandwiching belt, A moving frame that reciprocates toward the holding start end is provided on an extension line, and a nozzle that reciprocates in the moving frame in a front-rear direction perpendicular to the moving frame and inserts into and disengages from the mouth of the bag. In addition, the suction source and the gas supply source are connected and communicated with each other through a pipe to this nozzle, and the bag is carried toward the sandwiching belt with the nozzle inserted into the mouth of the bag to evacuate the bag. After performing at least one of the gas filling for the bag, and configured to retract the nozzle so as to disengage from the mouth of the bag.

In the bag degassing and gas filling apparatus in the bag mouth sealing machine, the invention according to claim 2 is characterized in that the moving frame is formed by a reciprocating mechanism with one side of the holding belt on the holding extension line and the holding belt. While the nozzle reciprocates between the rear end of the holding start end and the nozzle, the forward and backward movement mechanism that operates in a direction orthogonal to the reciprocation mechanism maintains the protruding state during the forward movement of the moving frame and the nozzle together with the mouth of the bag. After moving to the position where the sheet is held by the holding belt and performing at least one of deaeration and gas filling, the sheet is retracted from the state where the sheet is held by the sheet holding belt, and the retracted position is maintained while being maintained by the retracted position holding mechanism. At the original position, and project forward at the original position to stand by.

The invention according to claim 3 is the reciprocating mechanism of the moving frame, wherein the horizontal guide rod guides the moving frame between the nozzle standby position and the rear part of the holding start end of the holding belt. A pulling means comprising a pull cord or the like which constantly urges the moving frame to the nozzle standby position side, and the moving frame locks the mouth of the bag with the nozzle so that the bag is pinched by the pinching belt. It is configured to move forward with the transfer of the holding belt together with the nozzle.

Further, the invention according to claim 4 is a mechanism for moving the nozzle back and forth, wherein the nozzle mounting member having the nozzle protruding on the front surface by the spring force is provided from the nozzle insertion support port provided on the movable frame. When the moving frame reaches the forward movement end, the sliding piece mounted on the lower surface of the nozzle mounting member is engaged with the engaging projection of the rotating arm when the moving frame reaches the forward end. The nozzle is retracted by the rotation of the moving arm, and the retracted position holding mechanism projects from the upper surface of the nozzle mounting member when the nozzle mounting member is retracted by the engagement projection of the rotating arm. By rotating the rotating plate arranged behind the moving frame by the engaged engaging element, the engaging element is moved to the rear side of the rotating plate,
While the sliding piece of the nozzle mounting member is disengaged from the engagement projection of the rotating arm, the spring force causes the engaging element to abut on the rear surface of the rotating plate, receive and hold the nozzle at the retracted position, Move the moving frame back along the rotating plate,
The engagement element is configured to be disengaged from the rotary plate when reaching the standby position side.

The invention according to claim 5 is characterized in that the holding portion of the holding belt is constituted by a belt core and an elastic belt portion formed of a sponge having a constant thickness layered on the belt core. I have.

[0013]

The bag containing the articles is placed on the conveyor start end side, and its mouth is placed on one end of the sealing machine in a protruding state in a standby nozzle, and the other end of the bag is sandwiched. When the belt is sent to the clamping start end of the belt and is clamped by the clamping belt, the bag is transported on the conveyor toward the other side of the sealing machine by the transition of the clamping belt. A moving frame that supports the nozzle so that it can move back and forth is integrally moved with the bag, and the nozzle inserted into the mouth of the bag is moved toward the sealing device while being held by the holding belt. Moving. On the other hand, when the nozzle starts moving together with the bag, the intake opening / closing valve is opened, and the suction force from the vacuum pump acts on the nozzle through the pipe, so that the air in the bag is sucked and deaerated.

Then, when the nozzle moves to just before reaching the sealing device, the intake opening / closing valve closes to shut off the deaeration effect of the vacuum pump, and is supported by the moving frame so as to be able to move back and forth so that the nozzle retreats. Remove from the mouth of the bag. At this time, since the deaeration action in the bag is performed in a state where the nozzle is pinched by the holding belt together with the mouth of the bag, the nozzle is inserted when the nozzle is pulled out from the mouth of the bag after deaeration. The mouth of the bag is instantly pinched by the pinching belt, so that no outside air enters the bag. When the nozzle retreats from the mouth of the bag, the mouth of the bag is carried into the sealing device and sealed, while the nozzle returns to the original standby position.

Further, in order to fill the bag with a gas such as nitrogen gas after degassing the bag, gas is supplied to the nozzle after the gas is evacuated from the bag and before the nozzle retreats. The supplied and degassed bag is filled and then the nozzle is retracted. When filling only the gas into the bag without degassing the inside of the bag, the suction from the vacuum pump is shut off, and only the gas filling process by the nozzle is performed.
Also in this case, the transport of the bag and the advance / retreat operation of the nozzle with respect to the mouth of the bag are the same as described above.

The moving frame supporting the nozzle so as to be able to move back and forth is reciprocated between the nozzle standby position and the rear portion of the holding end of the holding belt along the horizontal guide rod. As described above, the forward movement is performed by the nozzle being locked in one end of the bag and moving as the bag is transported, and the backward movement is performed by always moving the moving frame to the nozzle standby position. This is to return the nozzle detached from the mouth of the bag to the original standby position by the pulling means made of a pulling string or the like urged to the side.

Further, the mechanism for moving the nozzle back and forth with respect to the moving frame normally causes the nozzle to protrude forward by a spring force when the degassing or the like is completed. The engagement protrusion of the turning arm disposed on the forward end side of the nozzle is engaged with the sliding groove mounted on the lower surface of the nozzle mounting member, and the nozzle is retracted by turning the turning arm. When the sliding groove is disengaged from the engaging projection of the rotating arm, the engaging member projecting from the upper surface of the nozzle mounting member is brought into contact with the rear surface of the rotating plate disposed behind the moving frame. The moving frame is moved back along the rotating plate while being brought into contact with and received to hold the nozzle at the retracted position, and the engaging element is disengaged from the rotating plate when reaching the standby position.

On the other hand, the holding belt for holding the mouth portion of the bag is constituted by a belt core and an elastic belt portion made of a sponge having a constant thickness layered on the belt core. With this arrangement, the mouth of the bag can be securely and smoothly held by the elastic belt portion without slipping, and the elasticity can be adjusted according to the thickness of the nozzle inserted into the mouth of the bag when performing degassing or the like. While the belt is compressed and deformed, the nozzle can be reliably pinched together with the mouth portion of the bag, and the pulley that wraps the holding belt having this elastic belt portion is thinner than the pulley that wraps a thin sealing belt that does not compress and deform. Also, the outer diameter of each belt is set equal to the outer diameter of the belt, and the rotation speed of the pulley on which the sandwiching belt is applied is higher than that of the pulley on which the sealing belt is applied. Is increased by a predetermined speed, so that the transition speed of both belts between the pulleys is the same speed, even though the peripheral speed of the sandwiching belt stretched over the pulleys is higher than the peripheral speed of the sealing belt. Can be.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, a specific embodiment of the present invention will be described. In FIG. 1, A is a sealing machine for sealing a mouth c of a bag C containing articles such as food. A belt conveyor 2 that moves horizontally from one side to the other end is integrally disposed on the front side of the machine casing 1 and a bag C is provided on one side of the machine casing 1. And a gas filling device B for degassing and filling the bag C with a gas such as nitrogen gas.

In the sealing machine A, a pair of upper and lower bag mouth portion conveying sandwiching belts 3A and 3B are attached to one side and the other end of the front surface of the machine frame 1 in a state in which the opposed sandwiching surfaces are in contact with each other. A pair of upper and lower pulleys 31 and 32 and a pair of upper and lower pulleys 33 and 34 are endlessly supported between the upper and lower pulleys 33 and 34, respectively. The lower pulley 43 and the upper pulley 43 are rotatably supported by the central portion and the other end of the front surface of the machine frame 1 in a state where the sealing belts 4A and 4B are in contact with each other. , 44 are endlessly wound around the holding belts 3A, 3B in a state close to and parallel to the holding belts 3A, 3B, respectively.

As shown in FIG. 3, the pair of upper and lower sandwiching belts 3A and 3B are elastic belt portions made of a sponge having a constant thickness (10 mm) on a thin belt core 30 made of steel or glass fiber having a thickness of 0.8 mm. The upper and lower sealing belts 4A and 4B are made of the same material as the core 30 of the sandwiching belts 3A and 3B, and have a thickness of 0.3 mm. The height of the horizontal holding surfaces of these holding belts 3A, 3B and the sealing belts 4A, 4B that are in contact with each other is substantially equal to the height of the mouth c of the bag C conveyed by the belt conveyor 2. It is arranged so that it may be in a position. The holding belts 3A and 3B and the sealing belt
Pulleys 31, 33 and 41, 43 on the other end side of 4A and 4B are drive pulleys, and are the same drive motors (not shown) as the drive side rollers (not shown) of the belt conveyor 2 of the machine frame 1. ) To be simultaneously driven to rotate.

Nipping belts 3A and 3B and sealing belts 4A and 4B
The drive pulleys 31, 33 and 41, 43 of FIG.
The sprocket wheels 35, 35, 45, and 45 are rotated by a drive motor via a drive transmission mechanism such as a chain, and are each rotationally driven. Its structure is a clamping belt 3
The centers of the drive pulleys 31 and 33 of A and 3B and the sprocket wheel 35 are integrally connected by a rotating shaft 36, and sealing belts are attached to both ends of a shaft cylinder 46 fitted on the shaft 36 via metal.
The sprocket wheel 35, which fixes the drive pulleys 41, 43 of 4A, 4B and the sprocket wheel 45, respectively, and transmits rotation to the drive pulleys 31, 33 of the sandwiching belts 3A, 3B.
Formed with a smaller diameter than the sprocket wheel 45 that transmits rotation to the drive pulleys 41 and 43 of the sealing belts 4A and 4B.
For example, the rotation ratio between the small-diameter sprocket wheel 35 and the large-diameter sprocket wheel 45 is set to 1.33: 1, and the outer diameters of the holding belts 3A and 3B that are stretched over the drive pulleys 31 and 33 and the drive pulleys 41 and 43 are stretched. The driving pulleys 31, 33, which are configured so that the outer diameters of the sealing belts 4A, 4B are the same as the outer diameter of the sealing belts 4A, 3B, and the driving pulleys 41, 43, which extend the sealing belts 4A, 4B. By increasing the rotation speed of the holding belts 3A and 3B by a predetermined speed, the circumferential speed of the holding belts 3A and 3B is higher than the circumferential speed of the sealing belts 4A and 4B. 3A, 3B
And the sealing belts 4A and 4B move at the same speed.

The opening end of the opening of the bag C between the pair of upper and lower sealing belts 4A, 4B, that is, the position of the upper and lower driven pulleys 42, 44 is provided at the front center of the machine frame 1 as described above. The opening end of the mouth C of the bag C by the pair of upper and lower holding belts 3A and 3B provided on one side of the front of the machine frame 1, that is, separated from the position of the vertically driven pulleys 32 and 34 in the bag conveying direction. In addition, a pair of upper and lower sealing heaters 4C and 4D (shown in FIG. 1) are disposed so as to sandwich the central portion of the opposing holding surfaces of the sealing belts 4A and 4B.

On the other hand, as shown in FIGS. 5 to 7, a deaeration and gas filling device B provided on one side of the machine frame 1 is provided behind driven pulleys 32 and 34 of the sandwiching belts 3A and 3B. A rectangular nozzle mounting member 5 ′ which is disposed on one side of the machine frame 1 ′ of the machine frame 1 on the side and has a front end to which the nozzle 5 is fixed and which is long in the longitudinal direction.
And a vertically-long rectangular moving frame 6 supporting the nozzle mounting member 5 'so as to be movable in the front-rear direction, and the nozzle 5 moving the moving frame 6 from one side of the holding belt 3A, 3B to the holding start end of the holding belts 3A, 3B. A reciprocating mechanism 7 for reciprocating between a nozzle standby position with a small interval and a position between the holding belts 3A and 3B and reaching one side of the starting end of the sealing belts 4A and 4B; Forward and backward movement mechanism 8 for moving back and forth 5
, A nozzle retreat position holding mechanism 9, and a degassing pipeline 10 and a gas filling pipeline 11 that communicate with the tip nozzle port 51 of the nozzle 5.

One side wall 1a of the machine frame 1 'is provided with a holding belt 3A,
3B, the other side wall 1b is provided on the other side from the holding start end of the holding belts 3A, 3B, while the other side wall 1b is provided on the other side from the position of the driven pulleys 32, 34. In addition, the nozzle mounting member is provided at the center of the front wall of the machine frame 1 '.
A horizontally long rectangular opening 1c is provided between the side walls 1a and 1b so as to allow the 5 'to move forward and backward and to guide the movement in the horizontal direction. The starting end of the belt conveyor 2 is located at a position in front of the driven pulleys 32 and 34 of the sandwiching belts 3A and 3B. As shown in FIG. The bag C is formed on a bag carrying horizontal fixed base 2A on which the bag C is placed in a horizontal state, and the nozzle 5 stands by on the horizontal fixed base 2A while projecting from one side end of the horizontal opening 1c when the bag is carried. It is configured as follows.

The specific structure of each part of the degassing and gas filling apparatus B will be described. The moving frame 6 which supports the nozzle mounting member 5 'so as to be able to move back and forth is provided with a horizontally long rectangular insertion support at the lower center thereof. A reciprocating mechanism for reciprocating left and right movement of the moving frame 6 in a direction parallel to the holding belts 3A and 3B by providing a mouth 61 and inserting and supporting the nozzle mounting member 5 'so as to be movable back and forth through the insertion support opening 61; A moving frame 6 is provided with a horizontal guide rod 71 fixed between the lower ends of the front ends of the side walls 1a and 1b of the machine frame 1 'and a horizontal guide groove 72 provided on the lower surface of the top wall of the machine frame 1'. A hole 62 provided at the lower end of the rotator and a rotator 63 rotatably supported at the upper end are slidably supported along the horizontal guide rod 71 and the horizontal guide groove 72, respectively.

Further, as shown in FIG.
The upper end of the tension cord 73 is fixed to one side of the upper end of the machine frame 1 ′, and the tension cord 73 is pulled out of the machine frame 1 ′ and hangs down along one side wall outer surface of the machine frame 1 ′ via the guide 74. Then, the weight 75 is attached to the lower end of the nozzle 5, the moving frame 6 is drawn by the weight 75, and the spacing member 51 protruding from the rear end of one side of the nozzle 5 as shown in FIG. The protruding wall portion 1a 'of the side wall surface 1a of the machine frame 1' is brought into contact with the protruding wall portion 1a '. And a space in which one end of the mouth c of the bag C can be interposed between the nozzle 5 and the protruding wall 1a 'of the machine frame 1' by the space holding piece 51. Is provided so that the work of covering the mouth c of the bag C with the nozzle 5 can be performed smoothly. In addition, the spacing member
Instead of 51, one side surface of the moving frame 6 may be brought into contact with one side inner surface of the machine frame 1 '.

A moving mechanism 8 for moving the nozzle 5 back and forth
Is provided with a guide rod 81 projecting horizontally rearward at the lower rear portion of the moving frame 6, and a nozzle mounting member attached to the guide rod 81.
A sliding piece 82 formed of a downwardly-facing U-shaped horizontally-long rectangular frame fixed to the lower surface of the rear end of the 5 'is slidably fitted back and forth, and the guide rod 81 has a rear end spring receiver 83 and a sliding piece. A spring 84 is press-fitted between the rear end surface of the sliding frame 82 and the front end of the sliding piece 82 and is fixed to the lower rear end of the movable frame 6 by the elastic force of the spring 84 in a normal state. Department
The moving frame 6 is brought into contact with and received by the moving frame 64 so as to protrude forward to a position where the front end nozzle 5 reaches an extension of the holding start ends of the holding belts 3A and 3B.

Further, on the other side of the inner bottom surface of the machine frame 1 ', a lower end opening 82 which is opened downwardly of the sliding piece 82 is provided.
a rotatable arm 86 rotatably supported by an engaging projection 85 formed of a rotator which is positioned on the horizontal extension of At the rear end of the rotary arm 86, a projecting piece 88 is provided to project rearward. When the moving frame 6 moves forward and reaches the other side of the machine frame 1 ', that is, the vicinity of the starting ends of the pair of upper and lower sealing belts 4A and 4B, the moving frame 6 is fixed to the nozzle mounting member 5'. After the lower end opening 82a of the sliding piece 82 is fitted and engaged with the engaging projection 85, the rotating arm 86 is rotated rearward to thereby attach the nozzle mounting member 5 'to the moving frame 6. Is retracted against the force of the spring 84,
The nozzle 5 is withdrawn from the mouth c of the bag C rearward, and the nozzle mounting member 5 ′ moves back toward the original position while being held at the retracted position by the nozzle retracted position holding mechanism 9, while the rotating arm 86 is moved. After the engagement projection 85 is disengaged from the lower end opening 82a of the sliding piece 82 by the rotation, the projection piece 88 is rotated forward to set the protruding piece 88 on the inner bottom surface of the machine frame 1 '. It is configured such that it comes into contact with the limit switch 100 to return to the original state. Reference numeral 89 denotes a rotation motor of the rotation arm 86.

The nozzle retreat position holding mechanism 9 is
A rotating shaft 91 is disposed above the left and right movement path of the nozzle mounting member 5 'and both ends thereof are rotatably supported on both side walls 1a and 1b of the machine frame 1'. A horizontal reverse plate L having a fixed length is formed by bending a horizontal locking plate 92b rearward on the upper end of a vertical plate 92a having a front central portion integrally fixed thereto.
And a horizontal locking plate portion of the rotating plate 92, which protrudes downward at the center of the upper wall surface of the machine frame portion 1 'and bends the lower end portion forward. A fixed locking plate formed on a receiving piece 93a for detachably locking the upper surface 92b.
93 and a vertical plate portion 92a of the rotating plate 92 projecting obliquely upward toward the rear at the center of the rear surface of the vertical plate portion 92a.
A stopper protruding piece 94 that abuts on the lower surface of the receiving piece 93a of the 93 and prevents the rotating plate 92 from rotating further, and protrudes upward from the rear upper surface of the nozzle mounting member 5 '. And an engaging element 95 formed as described above.

The rotating plate 92 has one side end positioned at the middle in the left-right length direction of the machine frame 1 ', and the other side end of the reciprocating rotating arm 86 (front end). ), And the center of gravity is always positioned above the diagonally rear part of the rotating shaft 91 so that
The horizontal locking plate portion 92b is urged against the receiving piece portion 93a of the fixed locking plate 93 in the direction of locking. The rotating plate 92 may be biased in a direction in which the horizontal locking plate portion 92b is locked to the receiving piece portion 93a of the fixed locking plate 93 by a spring force without depending on the position of the center of gravity.

When the nozzle mounting member 5 'reciprocates integrally with the moving frame 6, the engaging member 95 protruding from the nozzle mounting member 5' moves vertically to the vertical plate portion 92a of the rotary plate 92. When the nozzle mounting member 5 'is moved backward by the rotation of the reciprocating rotary arm 86, the nozzle mounting member 5' moves in parallel with the vertical plate portion 92a at the front side of the nozzle mounting member 5 '. The spigot 95 moves the rear end inclined surface 95a to the vertical plate portion 92 of the rotating plate 92.
a of the rotating plate 92 while the horizontal locking plate portion 92b is rotated in a direction away from the receiving piece portion 93a of the fixed locking plate 93 by contacting the lower end portion of the front surface of the rotating plate 92 with the vertical plate of the rotating plate 92. It passes over the lower end of the portion 92a.

Further, after passing through the engagement element 95, the rotating plate 92 immediately returns to the original state, and at the same time, the nozzle mounting member 5 'moves the lower end sliding piece 82 from the engaging projection 85 of the reciprocating rotating arm 86. The engaging member 95 is moved forward by the resilient force of the spring 84 so that the front end surface of the engaging element 95 abuts on the rear surface of the vertical plate portion 92a of the rotary plate 92. While holding the nozzle mounting member 5 'along the vertical plate portion 92a.
Is moved toward the original position, and the vertical plate portion 92a of the rotating plate 92 is moved.
When the engaging element 95 is disengaged from one side end, the nozzle mounting member 5 'moves forward by the elastic force of the spring 84 so that the nozzle 5 protrudes forward, and returns to the original position in this state. . The engagement element 95 is a nozzle mounting member.
Although the structure is fixed to the upper surface of the nozzle 5 ', it may be formed in a frusto-conical shape and the center thereof is rotatably supported on the upper surface of the nozzle mounting member 5'. For example, the engaging element 95 can be smoothly moved while rotating to the rear surface of the vertical plate portion 92a of the rotating plate 92.

The nozzle 5 is, as shown in FIGS.
It has a shape formed in a thin-walled part in which both sides of the front horizontal rectangular shape are gradually thinned, and the front end center portion is cut into a predetermined width from the front end surface by a predetermined width to form a forked shape. Further, a deaeration hole 10a and a gas injection hole 11a having a circular cross section are provided inside the both sides of the nozzle 5, and these deaeration holes are provided.
The front end opposing portions of the gas injection hole 11a and the gas injection hole 11a open in the gap 52 between the opposing surfaces of the branch portion in a bifurcated manner. Further, a spiral strip 53 composed of a coil spring is provided inside the deaeration hole 10a and the gas injection hole 11a, and deaeration and gas injection are performed through a gap between the spiral pitches of the spiral strip 53, and a Of powdery and granular articles in bag C by air suction
A large amount is prevented from being sucked into the gas injection hole 10a or the gas injection hole 11a.

The deaeration line 10 and the gas filling line 11 are connected to the deaeration passage 10b and the gas filling passage 11b provided in the nozzle mounting member 5 '.
Are communicated with the deaeration hole 10a and the gas injection hole 11a, respectively.
Communicates with the degassing short pipe 10c and the gas-filled short pipe 11c connected to the rear end face of the nozzle mounting member 5 ', and furthermore, these degassing short pipe 10c and the gas-filled short pipe 11c have flexibility. They are connected and connected to a vacuum pump 11e and a gas cylinder 11f through a deaeration hose 10d and a gas filling hose 11d, respectively. The hose of the deaeration hose 10d is provided with an opening / closing valve, an intake adjustment valve, and a collection box (not shown) for powdered substances such as sucked food.
An opening / closing valve and a gas filling amount adjusting valve (not shown) are provided in 11d.

An operation switch (not shown) of the vacuum pump 10e is operated at the same time when the moving frame 6 starts moving, and the first contact piece 65 and the first contact piece 65 are provided on the other side of the moving frame 6. The two abutment pieces 66 are fixed, and the first abutment piece 65 and the second abutment piece 66 are attached to the limit switch 101, 102 attached to the one-side machine frame 1 'in the reciprocating path of the moving frame 6. When the gas is brought into contact with each other, the gas supply opening / closing valve is opened, and at the same time, the intake valve is closed to shut off the intake from the vacuum pump 10e to stop the intake by the nozzle 5, and the rotation of the rotary arm 86. Operating motor
The operation of operating the valve 89 to retract the nozzle 5 and closing the gas supply opening / closing valve is performed. Further, as shown in FIG. 1, a push button 200 for performing both deaeration and gas filling, a push button 201 for performing only gas filling, and a deaeration Push button 202 to make only
And a push button 203 for turning the power on and off. The article storage bag C has folds c1 at both ends.
This is a flat synthetic resin bag having c2.

The operation of the bag mouth sealing machine equipped with the degassing and gas filling device constructed as described above will be described. When performing degassing and gas filling, the power is turned on and the sealing machine A is turned on. After the operation state, the push button 200 is pressed, and then the bag C containing the granular food or the article such as the coffee beans is laid on the horizontal fixed base 2A with its mouth toward the nozzle 5 side. The nozzle 5 is inserted into the mouth c so that the mouth c of the bag C is covered with the nozzle 5 and the other end of the mouth c of the bag C is folded in this state. Department
When c2 is clamped between the clamping start ends of the pair of upper and lower clamping belts 3A, 3B, the bag C forms a sealing device on the belt conveyor 2 due to the movement (operation) of the clamping belts 3A, 3B to the other side. The conveyance is started toward the pair of upper and lower sealing belts 4A and 4B.

When the conveyance of the bag C is started, one side end of the spacing member 51 of the nozzle 5 is engaged with the inner surface of the one-side end fold c1 at the mouth c of the bag C as shown in FIG. Then, the nozzle 5 starts moving integrally with the bag C. By the movement of the nozzle 5, the moving frame 6 supporting the nozzle mounting member 5 ′ of the nozzle 5 so as to be able to move back and forth causes the pull cord 73 having the weight 75 attached to the lower end thereof to resist the weight of the weight 75. The upper and lower horizontal guide rods 71 and the horizontal guide grooves 72 move integrally while pulling. Further, the opening / closing valve in the degassing hose 10d is opened simultaneously with the start of the movement of the nozzle 5 to generate suction power from the vacuum pump 10e to the degassing hole 10a of the nozzle 5 through the degassing line 10, thereby sucking the air in the bag C. Remove.

As shown in FIG. 11, the nozzle 5 is held by the elastic belt portions 30 ', 30' forming the holding surfaces of the upper and lower holding belts 3A, 3B together with the mouth c of the bag C as shown in FIG. This is performed until it reaches a position close to the sealing belts 4A, 4B while being fixed to the moving frame 6.
When the contact piece 65 comes into contact with the limit switch 101, the opening / closing valve closes and the intake from the vacuum pump 10e side is shut off,
At the same time as the suction by the nozzle is stopped and the deaeration is completed, the gas supply opening / closing valve is opened and the gas such as nitrogen gas is introduced into the bag C from the gas injection hole 11a of the nozzle 5 through the gas filling pipe 11 from the gas cylinder 11e. Immediately filled, the other end folded portion C2 of the bag C is sandwiched between the sandwiching start ends of the pair of upper and lower sealing belts 4A and 4B, and the moving frame 6 is fixed immediately before the nozzle 5 reaches the sandwiching start end. The second contact piece 66 contacts the limit switch 102 to close the gas supply opening / closing valve, and at the same time, operates the rotation motor 89 of the rotation arm 86 of the front-rear movement mechanism 8 to move the nozzle 5 backward.

A pair of upper and lower sealing belts 4A and 4B have a mouth c.
Is transported to the other side of the machine frame 1 by the belt conveyor 2 which circulates and shifts in synchronization with the shift speed of the sealing belts 4A and 4B, and is opened by the sealing heaters 4C and 4D. Are fused and sealed. On the other hand, when the nozzle 5 reaches the vicinity of the nipping start end of the pair of upper and lower sealing belts 4A and 4B, the sliding piece 82 fixed to the lower surface of the nozzle mounting member 5 'is formed.
The lower end opening 82a is fitted and engaged with the engaging projection 85 protruding from the tip of the rotating arm 86, and from this state, the rotating motor 89 operates one rotation and rotates during the half rotation. The arm 86 pivots backward, and the nozzle mounting member 5 ′ retreats against the insertion support port 61 of the nozzle mounting member 5 ′ formed in the moving frame 6 against the force of the spring 84, and As described above, immediately before reaching the start ends of the sealing belts 4A and 4B, the nozzle 5 is withdrawn from the mouth c of the bag C rearward.

When the nozzle mounting member 5 ′ is retracted by the half rotation of the rotating arm 86, the engaging member 95 projecting from the upper surface thereof arranges the rear end inclined surface 95 a behind the moving frame 6. The rotating plate 92 is brought into contact with the lower end of the front surface of the vertical plate portion 92a of the rotating plate 92, and the rotating plate 92 is engaged with the receiving piece portion 93a of the fixed locking plate 93 suspended from the machine frame 1 '. The horizontal locking plate portion 92b that has been stopped is rotated in a direction away from the receiving piece portion 93a of the fixed locking plate 93 and passes over the lower end of the vertical plate portion 92a of the rotating plate 92. . Thus, when the engagement element 95 reaches the rear of the rotation plate 92, the rotation plate 92 returns to the original posture, and at the same time, the rotation arm 86 continuously rotates from the above half rotation to the next half rotation. The engagement projection 85 of the rotating arm 86 is disengaged from the opening 82a of the lower sliding piece 82 of the nozzle mounting member 5 ', and as shown by a two-dot chain line in FIG. The reciprocating force causes the front end face of the engaging element 95 to abut on the rear face of the vertical plate portion 92a of the rotating plate 92.

As described above, when the engaging member 95 projecting from the upper surface of the nozzle mounting member 5 'comes into contact with and is received by the rear surface of the vertical plate portion 92a of the rotating plate 92, the further forward movement is performed. While the nozzle 5 is blocked and held at the rearwardly retracted position from the pair of upper and lower sandwiching belts 3A and 3B, the engagement between the sliding piece 82 of the nozzle mounting member 5 'and the engagement protrusion 85 of the rotating arm 86 is prevented. When unraveled, nozzle 5
Is moved to one side of the machine frame 1 'by the weight of the weight 75 connected to the lower end of the tension cord 73 connected to one side thereof, and the moving frame 6 supporting the nozzle mounting member 5' The moving frame 6 supporting the nozzle mounting member 5 'while the engaging member 95 slides on the rear surface of the vertical plate portion 92a of the rotating plate 92.
Moves toward the original standby position.

When the engaging element 95 reaches one end of the rotating plate 92, the engaging member 95 is detached from the rotating plate 92, and the resilient force of the spring 84 causes the nozzle mounting member 5 'to move forward to move the nozzle 5 back to its original position. It is advanced to the protruding state, moved to the standby position in this state, and then stopped at the standby position to prepare for the mouth seal of the next bag C.

In the sealing machine A, at least one of the degassing and gas filling device B can be performed. For example, when only the degassing is performed, the push button 202 can be pressed. When the gas filling is stopped and the storage is easy to generate mold such as coffee beans and only the gas such as nitrogen gas is charged to prevent the generation, press the gas filling push button 201. It is only necessary to stop the vacuum pump 10e for degassing by pressing, and in any case, degassing or gas filling can be performed while performing the above operation as it is with one nozzle 5. .

[0045]

As described above, according to the bag deaeration / gas filling apparatus in the bag mouth sealing machine according to the first aspect of the present invention, the mouth of the bag conveyed by the conveyor is held by the holding belt. In a sealing machine configured to seal the mouth of the bag by a sealing device disposed in parallel with the holding belt while holding the holding belt, the sealing device is arranged on the extension line of the holding start end of the holding belt toward the holding start end. A reciprocating moving frame is provided, and the moving frame reciprocates in the front-rear direction perpendicular to the moving frame to support a nozzle that is inserted into and detached from the mouth of the bag, and the nozzle sucks air through a pipe. The source and the gas supply source are connected and communicated, and the bag is carried toward the sandwiching belt with the nozzle inserted into the mouth of the bag to reduce the degassing in the bag and gas filling in the bag. After either one is performed, the nozzle is retracted and detached from the mouth of the bag, so that the air in the bag is eliminated by one nozzle, that is, degassing and gas Can be performed simultaneously or separately, and furthermore, the nozzle is inserted into the mouth of the bag to perform degassing and gas filling, so that reliable and smooth degassing and gas filling are performed. It can be made possible.

Further, the nozzle is supported by a moving frame that reciprocates toward the holding start end on an extension of the holding start side of the holding belt so as to be able to reciprocate in the front-rear direction perpendicular to the moving frame. Degassing and gas filling in the bag can be accurately performed by moving the moving frame while the nozzle is inserted in the bag, and at the end of degassing and gas filling, the nozzle is retracted smoothly with respect to the moving frame. The bag can be detached from the mouth of the bag, and the nozzle can be operated lightly so that the reciprocating movement of the moving frame and the bag degassing operation and gas filling operation can be performed efficiently.

According to the second aspect of the present invention, the movable frame reciprocates between one side of the nipping belt extension line and the rear part of the nipping start end of the nipping belt by the reciprocating mechanism. The nozzle is moved forward and backward by a forward / backward movement mechanism that operates in a direction perpendicular to the reciprocating mechanism, and moves to a position where the nozzle is held by the holding belt together with the mouth of the bag when the moving frame moves in the forward direction. After performing at least one of the filling, retreat from the state sandwiched by the sandwiching belt, return to the original position while maintaining the retracted position by the retracted position holding mechanism, and protrude forward at the original position. Since it is configured to be on standby, the nozzle is held by the holding belt together with the mouth of the bag when degassing or filling the gas inside the bag, so that outside air can be reliably prevented from entering the bag. Can be degassed or filled with gas, and when the nozzle is pulled out from the mouth of the bag after degassing or gas filling, the mouth of the bag into which the nozzle was inserted is instantly pinched by the pinching belt Therefore, it is possible to reliably prevent outside air from entering the bag at this time. In addition, when the nozzle is retracted, the retracted position is maintained by the retracted position holding mechanism, so that the nozzle can smoothly return to the original position along the rear of the clamping belt without hitting the clamping belt. it can.

According to a third aspect of the present invention, there is provided a reciprocating mechanism of a movable frame which supports the nozzle so as to be movable back and forth,
Since the moving frame is constantly urged to the nozzle standby position side by a pulling means such as a pulling string or the like, at the time of the forward movement in which the nozzle is locked in one side end of the bag and moves according to the transport of the bag, The moving frame can be moved to the sealing device side along the horizontal guide rod against the pulling force of the pulling means, and when the nozzle comes off from the mouth of the bag after degassing or gas filling, the pulling of the pulling means is performed. It can be automatically returned to the original position with force.

According to a fourth aspect of the present invention, there is provided a mechanism for moving the nozzle back and forth with respect to the moving frame. In a normal state, the nozzle is projected to a forward position where degassing and gas filling can be performed by a spring force. When the degassing or gas filling is completed, the engaging protrusion of the rotating arm provided on the forward end side of the moving frame engages with the sliding groove mounted on the lower surface of the nozzle mounting member. As a result, the nozzle can be smoothly retracted by the rotation of the rotation arm and can be separated from the mouth of the bag. Further, when the sliding groove is disengaged from the engaging projection of the rotating arm, the engaging member projecting from the upper surface of the nozzle mounting member contacts the rear surface of the rotating plate provided behind the moving frame. The nozzle can be held at the retracted position by contact and reception, and in this state, the moving frame can be moved back along the rotating plate to return to the standby position.

Further, according to the fifth aspect of the present invention, since the sandwiching belt is constituted by the belt core and the elastic belt portion formed of a sponge having a constant thickness layered on the belt core, The elastic belt part can be securely and smoothly sandwiched by the elastic belt part without causing a slip or the like, and the elastic belt is compressed and deformed according to the thickness of the nozzle inserted into the mouth of the bag when performing degassing or the like. The nozzle can be reliably clamped together with the mouth of the bag, and the pulley over which the clamping belt having this elastic belt portion is stretched has a smaller diameter than the pulley over which a thin sealing belt that does not compress and deform is stretched. In addition, the outer diameters of the belts are set to be equal to each other, and the rotation speed of the pulley on which the holding belt is set is equal to that of the pulley on which the sealing belt is set, is increased by a predetermined speed. By the peripheral speed of the pinching belts spanned the pulley despite faster than the peripheral velocity of the seal belt, it is possible to transition the speed of the belts between the pulleys in the same speed.

[Brief description of the drawings]

FIG. 1 is a simplified perspective view of an entire sealing machine,

FIG. 2 is a simplified perspective view of the one-side machine frame when viewed from behind.

FIG. 3 is a sectional view of a holding belt and a sealing belt.

FIG. 4 is a cross-sectional view showing a driving mechanism of a sandwiching belt and a sealing belt.

FIG. 5 is a vertical side view of a nozzle moving mechanism.

FIG. 6 is a simplified plan view with a part thereof omitted.

FIG. 7 is a rear view with a part thereof omitted;

FIG. 8 is a simplified perspective view of a front end portion of a nozzle.

FIG. 9 is a cross-sectional view thereof,

FIG. 10 is a simplified plan view at the start of the transfer of the bag,

FIG. 11 is a vertical cross-sectional side view of a state of being held by a holding belt.

[Explanation of symbols]

 Reference Signs List A sealing machine B degassing and gas filling device C bag c bag mouth 1 machine frame 2 belt conveyor 3A, 3B sandwiching belt 4A 4B sealing belt 5 nozzle 5 'nozzle mounting member 6 moving frame 7 reciprocating mechanism 8 reciprocating Mechanism 9 Nozzle retreat position holding mechanism 10 Degassing line 11 Gas filling line

Claims (5)

[Claims] 1. A sealing machine configured to seal the mouth of a bag conveyed by a conveyor with a sealing device disposed in parallel with the sandwiching belt while clamping the mouth of the bag by a sandwiching belt. A moving frame that reciprocates toward the holding start end is disposed on an extension of the holding start end side of the holding belt, and the moving frame reciprocates in the front-rear direction perpendicular to the moving frame and the mouth of the bag. The nozzle that is inserted into and removed from the nozzle is supported, and the nozzle is connected to the suction source and the gas supply source through a pipe. The nozzle is inserted into the mouth of the bag, and the bag is carried toward the holding belt. After performing at least one of deaeration in the bag and gas filling in the bag, the nozzle is retracted and detached from the mouth of the bag. A degassing and gas filling device inside the bag in the mouth sealing machine for the bag. 2. The moving frame reciprocates between one side of the nipping belt extension line and a rear part of the nipping start end of the nipping belt by a reciprocating mechanism, while the nozzle is orthogonal to the reciprocating mechanism. After the moving frame moves forward to the position where it is held by the holding belt together with the mouth of the bag by the forward and backward movement mechanism that operates in the direction, and after at least one of degassing and gas filling, It is configured to retreat from the state of being clamped by the clamping belt, return to the original position while maintaining the retracted position by the retracted position holding mechanism, and project forward at the original position to stand by. The degassing and gas filling device in a bag in the bag mouth sealing machine according to claim 1. 3. A reciprocating mechanism for a moving frame includes a horizontal guide rod for guiding the moving frame between a nozzle standby position and a rear portion of a holding start end of the holding belt, and a moving frame constantly attached to the nozzle standby position. The moving frame is made up of a pulling string made of a tensioning string or the like, and the moving frame makes the nozzle lock the mouth of the bag, and when the bag is pinched by the pinching belt, the moving frame moves forward with the movement of the pinching belt together with the nozzle. 3. A degassing and gas filling device in a bag in a bag mouth sealing machine according to claim 1 or 2, characterized in that the gas filling is performed. 4. A nozzle back-and-forth movement mechanism constantly urges a nozzle mounting member having a nozzle projecting on a front surface from a nozzle insertion support port provided in a moving frame toward the front by a spring force. When the moving frame reaches the forward end, the sliding piece mounted on the lower surface of the nozzle mounting member is engaged with the engaging projection of the turning arm, and the nozzle is retracted by turning the turning arm. It is configured in,
When the nozzle mounting member is retracted by the engagement protrusion of the rotation arm, the retreat position holding mechanism causes the rotation plate disposed behind the moving frame by the engagement member projecting from the upper surface of the nozzle attachment member. When the sliding piece of the nozzle mounting member is disengaged from the engaging protrusion of the rotating arm, the engaging element is moved by the spring force to rotate the engaging element to the rear side of the rotating plate. The moving frame is moved back along the rotating plate while contacting and receiving the rear surface and holding the nozzle at the retracted position, and the engaging element is detached from the rotating plate when reaching the standby position. The degassing and gas filling device in the bag in the bag mouth sealing machine according to claim 1 or 2, wherein the gas is filled. 5. The holding portion of the holding belt comprises a belt core and an elastic belt portion formed of a sponge having a constant thickness layered on the belt core.
A device for deaeration and gas filling in a bag in a bag mouth sealing machine according to item 5.