JP2002225801A - Filling and measuring device into bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fill contents into a bag with high accuracy. SOLUTION: A system for filling contents into the bag comprises a holder unit 5 having at least a holder device 13 which opens and closes an opening 91 of the bag while retaining the bag 90 in a suspended state, a filling unit 3 provided with a filling nozzle 23 that can enter the bag from the opening and which fills the contents into the bag from the filling nozzle under such an inserted condition of the filling nozzle, a retractable driving unit 16 which causes the holder unit 5 and the filling unit 3 to relatively approach each other relatively separate from each other to get the filling nozzle out of the bag, a measuring means 17 to measure weight of the contents to be filled into the bag based on the total weight of the holder unit 5 where the bag is in a suspended state, and a control means 15 which fills the contents into the bag when the holder unit 5 and the filling unit 3 separate from each other and which controls the filling unit 3 so that filling of the contents may be stopped when the fixed amount is filled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag filling / measuring device capable of filling contents such as tea leaves into a bag with a high precision filling amount.

[0002]

2. Description of the Related Art When filling a bag with a predetermined amount of powdered or granular content, conventionally, the content from a hopper is measured by a measuring instrument and then directly or directly into a bag from a shooter or the like. are doing.

[0003]

In such a filling,
During filling, the contents adhere to the weighing machine or the shooter and the amount charged into the bag body is reduced, so that there is a problem that accurate filling cannot be performed. In addition, in the case of the powdery content, because of its light weight, it not only flies up at the time of filling into a bag and deteriorates the surrounding working environment, but also has a problem that the filling is insufficient due to the sowing loss as described above. I have.

The present invention has been made in consideration of the above-mentioned conventional problems, and allows a bag to be filled in an accurate amount without deteriorating the working environment. It is an object to provide a dosing and filling device.

[0005]

In order to achieve the above object, a first aspect of the present invention is a holder unit having at least a holder device for opening and closing a bag opening of a bag while holding the bag in a suspended state. A filling device that includes a filling nozzle capable of entering the bag body from the bag mouth, filling the contents from the filling nozzle into the bag body in a state where the filling nozzle enters, a holder unit so that the filling nozzle enters the bag body, and a holder unit. An approach / separation driving device that relatively closes the filling device and relatively separates the holder unit and the filling device so that the filling nozzle comes out of the bag, and suspends the weight of the contents filled in the bag. A weighing means for measuring from the weight of the entire holder unit in the lowered state, and at the time of moving the holder unit and the filling device in the separating direction, filling the contents into the bag body,
Control means for controlling the filling device so as to stop filling of the contents when the filling amount reaches the fixed amount.

In the present invention, the holder unit and the filling device move in the separating direction with the filling nozzle of the filling device entering the bag, and the contents are filled from the filling nozzle into the bag during this movement. . At the time of filling, the weighing means measures the weight of the content to be filled from the weight of the entire holder unit.Unlike the case where the content is filled after measuring the weight, the content is measured while measuring the weight. The bag is filled directly, and there is no loss of attachment of the contents during the filling. With such a configuration, the weight of the contents to be filled in the bag body can be accurately measured, and thus the bag can be filled with high accuracy.

Further, since the contents are filled in a state where the filling nozzle has entered the bag body, it does not soar around. Therefore, the working environment does not deteriorate.

According to a second aspect of the present invention, there is provided an apparatus for filling and weighing a bag according to the first aspect, wherein the weighing means uses the weight of the entire holder unit in a state where the bag is empty as a reference value. The weight of the contents filled in the body is measured by the weight of the entire holder unit.

According to the present invention, since the weight of the contents is measured by the weight of the entire holder unit with the empty state of the bag as a reference value, the filling amount can be measured with high accuracy.

According to a third aspect of the present invention, there is provided the bag filling and weighing device according to the first aspect, wherein the control means stops the movement of the holder unit or the filling device during the movement in the separating direction, In this stopped state, the filling device is controlled so that the contents are filled into the bag up to a fixed amount based on the measured value from the measuring means.

In the present invention, the filling amount of the contents is measured during the movement in the separating direction, so that the filling amount up to the fixed amount can be known. Thereby, high-precision filling without excess or deficiency can be performed.

According to a fourth aspect of the present invention, there is provided the apparatus for filling and measuring a bag according to the first aspect, wherein the control means is arranged so that a tip of the filling nozzle is in a non-contact state with the contents filled in the bag. The filling speed of the filling device and the separating speed of the contact / separation driving means are controlled so as to maintain the following.

Since the tip of the filling nozzle is not in contact with the contents as described above, the contents filled in the bag body do not adhere to the filling nozzle, and the loss due to the adhesion is eliminated. In addition, the weight of the filling nozzle does not affect the weight measurement of the contents. Thus, the contents can be filled with high precision.

According to a fifth aspect of the present invention, there is provided the apparatus for filling and weighing a bag according to the first or third aspect, wherein the filling apparatus is on a fixed side, and the holder unit is connected to a contact / separation driving means. It is characterized by being a movable side.

According to the present invention, since the holder unit is on the movable side, the structure of the separation movement between the holder unit and the filling device is simplified, so that the separation movement can be easily controlled.

According to a sixth aspect of the present invention, there is provided an apparatus for filling and weighing a bag according to any one of the first to third aspects, wherein the weighing means is provided at a connecting portion between the holder unit and the contact / separation driving means. A load cell.

[0017] By using the load cell as the measuring means, the filling amount of the contents can be measured quickly and accurately.

[0018]

1 and 2 are an overall side view and a front view, respectively, of an embodiment of the present invention. This embodiment includes an outer base 1 and an inner base 2,
The filling device 3 is supported on the outer base 1, and the bag supplying device 4, the holder unit 5, the bag mouth holding device 6, the chuck closing device 7, the folding device 8, the bag catcher device 9, the sealing device are supported on the inner base 2. 10 are arranged. The holder unit 5 includes a holder device 13 and a bag mouth gripping device 1.
4, and a gas nozzle 11 is provided. On the other hand, on the front side of the inner base 2, a bag pool device 12 is arranged.

The bag 90 is in a state where the peripheral portion other than the bag opening 91 is closed. The bags 90 are taken out one by one from the bag pooling device 12 by the bag supplying device 4 and suspended by the holder unit 5. The contents are filled by the filling device 3 while being held. After the filling, the bag is transported from the filling position by the bag catcher device 9, and the bag opening 91 is sealed by the sealing device 10 to be carried out.
As the contents to be filled, green tea, black tea, tea leaves such as oolong tea, coffee powder, powdered substances such as powder seasonings such as shavings and chemical seasonings are selected, and granules such as rice, wheat, beans and the like are selected. It may be in a liquid form such as a form, a juice, a seasoning, or the like.

The filling device 3 includes a drive box 21 and a hopper 22 both mounted on the outer base 1. The hopper 22 is filled with the above-mentioned contents, and a filling nozzle 23 for putting the filled contents into the bag body 90 is hung down. In this embodiment, the filling nozzle 23 is fixed to the outer base 1 by being integrated with the hopper 22, and its tip (lower end) extends toward the holder unit 5.

The drive box 21 is provided with a filling motor 24. The rotational force of the filling motor 24 is applied to a belt (not shown) wrapped inside the drive box 21.
Through the auger screw 25 (see FIG. 1). The auger screw 25 is inserted from the inside of the hopper 21 to the inside of the filling nozzle 23, and the contents inside the hopper 21 are introduced into the filling nozzle 23 by the rotation thereof,
It is charged into the bag body 90 from the tip of the filling nozzle 23 and filled. By using the auger screw 25 as described above, the filling amount of the content per unit time can be accurately measured based on the rotation speed of the auger screw 25, that is, the rotation speed of the filling motor 24.

As the filling motor 24, a motor capable of controlling the rotation speed of the auger screw 25 with good accuracy is preferable. Therefore, in this embodiment, a pulse motor is used. Filling motor 2 consisting of a pulse motor
4 is controlled by a control unit 15 as a control means, so that the contents of the bag body 90 can be filled with high precision as described later. Note that the filling motor 24 may be a motor other than the pulse motor as long as it can control the number of rotations.

The bag pool device 12 sequentially supplies the bags 90 to the bag supply device 4 and is disposed at a position close to the bag supply device 4. As shown in FIG. 3, the bag pool apparatus 12 includes an endless conveyor 27 that runs intermittently by a motor (not shown).
On the conveyor 27, partition plates 28 are attached at appropriate intervals, and a bag body 90 is placed between adjacent partition plates 28 in a state of being divided into a plurality of stacked blocks. . And conveyor 2
The bags 90 are taken out one by one from the block on the upstream side in the running direction of No. 7. When the bag 90 disappears from the upstream block, the conveyor 27 travels a predetermined stroke in order to move the next block to the bag supply device 4 side.

In order to transfer the bag 90 from the bag pool device 12 to the bag supply device 4, a transfer rod 29 is disposed between them. The transfer rod 29 takes out the bags 90 one by one from the block on the upstream side of the bag pool device 12 by suction. The transfer rod 29 is connected to a transfer cylinder 30
, And moves forward and backward in a direction perpendicular to the direction of conveyance by the bag pool device 12 by driving of the transfer cylinder 30. A pedestal 31 (see FIG. 2) that can move up and down is disposed adjacent to the bag pool device 12.
The transfer rod 29 transfers the sucked bag body 90 to the receiving table 31. The bag body 90 transferred to the receiving table 31 is supplied to the holder unit 5 by the bag body supply device 4.

The bag supply device 4 includes a cam plate 33 attached to the inner base 2 with the cam groove 33a formed.
, A pickup arm 34 rotatably attached to the cam plate 33, and a supply arm 35 running along the cam groove 33a.

The pickup arm 34 takes out the bag 90 on the receiving table 31 by suction, and supplies the bag 90 to the supply arm 35. The supply arm 35 is connected to the bag opening 9 of the bag body 90.
The bag body 90 is received so as to suck the bag 1 from both sides, and includes a pair of suction heads 35a for sucking the bag opening 91 from both sides. When the supply arm 35 travels along the cam groove 33a in the suction state of the suction head 35a, the suction head 35a moves in the separating direction. This movement in the separating direction causes the bag body 90 to move into the bag mouth 9.
1 is opened. The supply arm 35 rotates from a solid line state in FIG. 3 to a substantially horizontal position shown by a chain line state, and supplies the bag body 90 with the bag opening 91 opened to the holder unit 5 by this rotation.

FIGS. 4 to 6 show the holder unit 5, which includes an elevating block 37 which moves up and down within a predetermined range by driving a contact / separation driving device 16, which will be described later,
7, a holder frame 13 and a bag mouth gripping device 14 are mounted on the unit frame 38.

The holder device 13 has a pair of holders 39 for respectively holding the bag openings 91 of the bag body 90. By holding the bag mouth 91 between the pair of holders 39,
The bag 90 is held by the holder device 13 in a suspended state.

As shown in FIG. 4, a pair of holders 39
It has a holding plate 39a and a holding claw 39b, respectively, and holds the facing bag mouth 91 of the bag body 90 between the holding plate 39a and the holding claw 39b. Each holder 39
Is biased by a spring (not shown) in the direction of pressing against the holding plate 39a, so that the bag opening 91 is held by the holding plate 39a and the holding claw 39b.
Is maintained. In order to release the holding of the bag mouth 91, a holding release cylinder 41 is arranged at a position facing each holding claw 39b.

Each of the holders 39 is attached to a rod of an opening cylinder 40 mounted on the unit frame 38 so as to face each other. The movement of the holder 39 in the separating direction causes the bag opening 9 of the bag body 90 to move.
1 is opened, and the bag opening 91 is closed by the movement of the holder 39 in the approaching direction. As described above, in this embodiment, the bag opening 91 of the bag body 90 is forcibly opened by the movement of the holder 39 in the separating direction.

As shown in FIGS. 5 and 6, both sides 92 (FIG. 14) of the bag mouth 91 of the bag body 90 are provided.
(See FIGS. 15A and 15B and FIG. 15). Each gripping member 43 is attached to a gripping cylinder 44, and the gripping cylinder 44
, The sides 92 of the bag opening 91 are gripped and released. The bag mouth gripping device 14 is driven when the flat bag F1 and the zippered bag F2 are shown in FIGS. 14A and 14B, and is not driven when the gusset bag F3 is shown in FIG. 14C. The operation is switched in the following manner.

As shown in FIG. 5, each of the gripping cylinders 44 is connected to an opening / closing drive member 45 and a tension applying member 46 attached to the lower side of the unit frame 38. That is, on the lower surface of the unit frame 38,
The frame brackets 47 hang down so as to face each other, and an opening / closing drive member 45 and a tension applying member 46 are attached to each frame bracket 47. Then, the first connecting arm 48 is attached to the rod of the opening / closing drive member 45.
On the other hand, the second connecting arm 49 is attached to the rod of the tension applying member 46, and the gripping cylinder 44 is connected to the respective connecting arms 48, 49, so that the opening / closing drive member 45 and the tension applying Member 46
It is a structure to be connected to.

As the opening / closing drive member 45 and the tension applying member 46, cylinders which expand and contract in the direction of the bag body 90 are used, and by driving these cylinders, the holding cylinder 44, that is, the holding member 43 of the bag body 90 is moved. Move forward and backward in the direction. In this case, the rod of the opening / closing drive member 45 slidably penetrates the second connection arm 49 on the tension applying member 46 side, whereby the first connection arm 48 and the second connection arm 49 are respectively connected. Are movable by the cylinders 45 and 46 of FIG.
The (grip member 43) is configured to move forward and backward by driving the opening / closing drive member 45 and the tension applying member 46, respectively.

The opening / closing drive member 45 moves the pair of gripping members 43 in the direction of coming and going by the driving thereof. Thus, the opening / closing drive member 45 operates to open / close the bag opening 91 of the bag body 90 held by the pair of holding members 43. The opening / closing operation of the bag opening 91 is performed in conjunction with the driving of the holder device 13 described above.

On the other hand, the tension applying member 46 is
5, the bag body whose bag mouth 91 is closed is further pulled. For this reason, the tension applying member 46
Is a direction in which the gripping member 43 gripping the bag mouth 91 in the closed state is further separated.

As shown in FIG. 4, the contact / separation driving device 16 for moving the holder unit 5 in the vertical direction includes a column 51 fixed to the inner base 2 along the vertical direction,
1, a pair of pulleys 52 attached to the upper end portion, a chain 53 that engages with the pulley 52 and travels in the vertical direction, and an elevator 5 connected to both ends of the chain 53.
4 and a balance weight 55. A guide rail 56 is attached to the column 51 along the up and down direction, and the elevator 54 moves up and down along the guide rail 56.

The elevator 54 is connected to an elevating motor 57, and moves up and down by forward and reverse rotation of the elevating motor 57. The elevating block 37 of the holder unit 5 is attached to the elevator 54, whereby the holder unit 5 moves up and down by driving the elevating motor 57. When the holder unit 5 is lowered, the contents are filled into the bag body 90 while being measured. Since the contents are measured together with the lowering of the holder unit 5, a pulse motor whose rotation speed can be controlled and other motors are used as the elevating motor 57.

The contents are measured based on the weight of the entire holder unit 5 which is increased by filling the contents into the bag 90, based on the weight of the entire holder unit 5 when the bag 90 is empty. The holder unit 5 is provided with a weighing means 17 for that purpose.

The weighing means 17 is provided at the connecting portion between the lifting block 37 and the unit frame 38 in the holder unit 5 and connects them. The unit frame 38 and the holder device 13 attached to the unit frame 38 are connected. And bag mouth holding device 14 and holder device 1
The weight of the contents filled in the bag 90 together with the bag 90 suspended from the bag 3 is measured.
As the weighing means 17, a load cell that detects weight from its own distortion can be used. The control unit 15 receives the weight measurement signal from the weighing unit 17 and based on the input measurement signal,
7 is controlled. For this reason, the control unit 15 also functions as control means for the elevating motor 57.

As shown in FIGS. 4 to 6, the holder unit 5 is provided with a gas nozzle 11. The gas nozzle 11 is vertically movable and is connected to a gas tank and a pump (both not shown) via a valve (not shown). Thereby, the gas nozzle 11
Enters the bag 90 before filling the contents and injects an inert gas such as nitrogen or a gas such as air to inflate the bag 90 to facilitate filling of the contents into the bag 90. . As shown in FIG. 6, the gas nozzle 11 is attached to the elevating block 37 of the holder unit 5 to be independent of the above-mentioned measuring means 17, and therefore, the measuring means 17 is provided with the gas nozzle 11 and its mounting member. The weight of the entire holder unit 5 excluding the above is measured.

The bag mouth holding device 6 acts so as to hold the bag mouth 91 of the bag body 90 from both sides and close the bag mouth 91 prior to the gas injection by the gas nozzle 11. As shown in FIG. 1, the bag mouth holding device 6
And a pair of rotating arms 59 that rotate above the arm.
Further, a rotation cylinder 60 for rotating the rotation arm 59 is provided.
Are supported by the inner base 2 as shown in FIG.

FIG. 7 shows the bag mouth holding device 6, in which the upper ends of the respective rotating arms 59 are connected to the rotating gears 61 meshed with each other.
It is connected to. The rotation gear 61 is attached to the inner base 2 so as to be located above the holder unit 5. The rotation cylinder 60 is provided at a position close to the rotation gear 61, and its rod is connected to one of the rotation gears 61. Therefore, when the rotation cylinder 60 expands and contracts, the rotation arm 59 rotates between the solid line and the chain line.

As shown in FIG. 2, a holding bar 62 extending along a bag opening 91 of the bag body 90 is attached to each of the rotating arms 59. The holding bar 62 acts to hold a portion of the bag body 90 held by the holder device 5 that is different from the bag mouth portion from both sides. That is, the bag mouth portion is closed by pressing the bag mouth portion slightly lower than the bag mouth portion held by the holder 39 of the holder device 5, thereby holding the holder 39 in the bag body 90. Gas is prevented from leaking from a portion below the portion, and the gas injected by the gas nozzle 11 can inflate the bag 90 reliably.

The bag catcher device 9 receives the bag 90 filled with the contents from the holder device 13 and conveys it to the carry-out side. As shown in FIGS. 8 and 9, the bag catcher device 9 includes a pair of catcher bars 64 sandwiching the bag opening 91 of the bag body 90 from both sides, a catcher cylinder 65 for moving the catcher bar 64 in the direction of contact and separation. It has. Each catcher cylinder 65 is attached to a catcher arm 66, and the catcher arm 66 is connected to a slider 67.

As shown in FIG. 2, the slider 67 moves in a reciprocating direction along a guide rod 68 which is horizontally hung on the inner base 2. As shown in FIG. 8, the movement of the slider 67 is performed by a slide cylinder 70 attached to the inner base 2, and the slider 67 is connected to the slide cylinder 70 via a connection link 71. Further, as shown in FIG.
Is mounted with a lifting cylinder 69 which is oriented vertically. A catcher arm 66 is supported by the lifting cylinder 69. Thus, the pair of catcher bars 64 can move up and down.

A folding device 8 is provided in connection with the bag catcher device 9 described above. As shown in FIGS. 10 and 11, the folding device 8 includes a moving-side folding member 73.
And a fixed-side folding member 74. The moving-side folding member 73 is attached to a bracket plate 75 provided on the catcher arm 66 of the bag catcher device 9, whereby the moving-side folding member 73 is integrally formed with the catcher bar 64 attached to the catcher arm 66. Move. On the other hand, the fixed side folding member 74 is attached to the inner base 2 at a position facing the moving side folding member 73.

The folding members 73 and 74 are plate-shaped folding pieces 76 and 77 oriented vertically, and folding cylinders 78 and 78 for moving the folding pieces 76 and 77 forward and backward.
79. The folded pieces 76 and 77 are a bag 90
And enters the end faces 93 (see FIG. 14 (c)) on both sides of the end face 93 to fold the end faces 93. The folded pieces 76 and 77
Is performed simultaneously on the moving side and the fixed side before the bag body 90 is clamped by the bag body catcher device 9. The folding device 8 is driven when the bag body 90 is the gusset bag F3 shown in FIG. 14C, and is not driven when the bag body 90 is the flat bag F1 and the zippered bag F2 shown in FIGS. 14A and 14B. The operation is switched in the following manner.

As shown in FIG. 2, a chuck closing device 7 is disposed in the transport path of the bag catcher device 9, and a sealing device 10 is disposed at the end of the transport path.

As shown in FIG. 12, the chuck closing device 7 includes a bracket 81 fixed to the inner base 2 and a pair of chuck closing rollers 82 attached to the bracket 81 so as to face each other. The chuck closing roller 82 is attached to the bracket 81 so as to be located in the transport path of the bag catcher device 9, and is pressed from both sides into the bag mouth 91 of the bag 90 transported by the bag catcher device 9. To roll.

The rolling in the pressed state causes the bag 90
Can be closed (see FIG. 14B). Therefore, the chuck closing device 7 effectively operates when the bag with the chuck F2 shown in FIG. 14B is used, and the flat bag F1 shown in FIGS. 14A and 14C.
In the case of the gusset bag F3, the passage of the bag body 90 is simply permitted. In order to perform the closing operation in accordance with the chuck 94, one of the chuck closing rollers 8 is used.
Reference numeral 2 indicates that an adjustment dial 83 can be used to adjust the interval with the other chuck closing roller 82.

As shown in FIG. 13, the sealing device 10 is provided with a pair of seal bars 85, and heat seals the bag mouth 91 of the bag body 90 inserted into the seal bar 85. To perform the heat sealing, one seal bar 85 is connected to a sealing cylinder 86. Note that the sealing device 10 may be configured to perform ultrasonic sealing. In this case, the ultrasonic horn and the receiving table
This is possible by arranging them so as to travel along the bag mouth 91 of the vehicle.

Next, the operation of this embodiment will be described.
Before the bag body 90 is supplied, the holder unit 5
Is stopped at the lowest position shown by the solid line in FIGS. 2, 4 and 5. The supply arm 35 of the bag supply device 4 supplies one bag 90 taken out of the bag pool device 12 to the holder device 13 of the holder unit 5 at the lowest position. In the case where the bag body 90 is a bag F2 with a chuck, the bag is supplied with the chuck 94 fitted.

The bag 90 is attached to the suction head 3 of the supply arm 35.
The bag mouth 91 is opened by the separation of 5a, and is held by the holder device 13 in this opened state. In the case of the bag F2 with a chuck, the chuck 94 is closed, but the upper side of the bag mouth 91 with respect to the chuck 94 is opened and supplied by the suction head 35a. Hereinafter, a bag opening step, a bag inflation step, a content filling / measuring step, and a bag mouth sealing step are sequentially performed.

(1) Bag Opening Step In the holder device 13, the holding release cylinder 41 is
9b is opened, and after the facing bag mouth 91 of the bag body 90 supplied by the supply arm 35 is inserted between the holding claw 39b and the holding plate 39a, the holding claw 39b is pressed against the holding plate 39a. Thereby, the bag body 90 is held in a suspended state.

Here, when the bag body 90 is a flat bag F1 and a bag F2 with a chuck, the bag mouth gripping device 14 operates as follows.

At the same time that the holder 39 of the holder device 13 sandwiches the bag opening 91 of the bag body 90, the gripping members 43 of the bag body gripping device 14 grip both side edges 92 of the bag body 90. Of the opening and closing drive member 45
Rod exits. Thereafter, the opening cylinder 40 moves the holder 39 in the separating direction. The bag mouth 91 is forcibly opened by the separation movement of the holder 39, and even in the case of the bag F2 with a chuck, the fitted chuck 94 is forcibly released from the fitting and the bag mouth 91 is opened. . Simultaneously with the movement of the holder 39, the rod of the opening / closing drive member 45 advances to move the gripping member 43 in the approaching direction. FIG. 15 shows this state. When the holder 39 and the gripping member 43 move in the separating direction, the bag mouth 91 is opened in a substantially rhombic shape, and can be sufficiently opened.

On the other hand, when the bag body 90 is the gusset bag F3, the bag mouth gripping device 14 does not operate, and the holder 39 moves in the separating direction, whereby the bag mouth 91 of the gusset bag F3 is opened. Is done. This is because both ends 93 are folded in the gusset bag F3, and when the bag mouth gripping device 14 grips both sides 92, the opening operation of the both ends 93 cannot be performed. In the gusset bag F3, the folded side surfaces 93 automatically open following the movement of the holder 39 in the separating direction, so that the bag opening 91 can be sufficiently opened.

(2) Inflation Step of Bag 90 With the opening of the bag opening 91 as described above, the gas nozzle 11 descends and enters the bag 90 from the bag opening 91. When the bag body 90 is a flat bag F1 and a bag F2 with a chuck after the gas nozzle 11 enters, the rod of the opening / closing drive ratio 45 retreats and the holding member 43 moves away, and at the same time, the opening cylinder 4
By 0, the holder 39 moves closer. Thereby, the bag mouth 91 is closed. On the other hand, the bag body 90 is a gusset bag F3.
In this case, the holder 39 moves closer and the bag opening 91 is closed.

Thereafter, the bag mouth holding device 6 operates. In the bag mouth holding device 6, the rotation cylinder 60 is driven to rotate the holding bar 62 in the direction of the bag 90 (the direction from the dashed line position to the solid line position in FIG. 7). Press the mouth 91 from both sides. The holding bar 62 slightly closes the bag mouth portion lower than the bag mouth 91 held by the holder 39 to close the bag mouth 91. In this state, gas is injected from the gas nozzle 11 into the bag 90, and the bag 90 expands. Thereby, the close contact of both sides of the bag due to static electricity and the viscosity of the packaging material is released, and the inflated state is maintained, so that the contents adhere to the inner surface of the bag 90 and the sealing property of the bag opening 91 is reduced. And the contents do not overflow from the bag. As a result, manufacturing errors can be eliminated, and the yield can be improved. This bag 9
After the zero inflation, the holding bar 62 rotates in the opposite direction and separates from the bag body 90.

Thereafter, when the bag body 90 is a flat bag F1 and a bag F2 with a chuck, the opening cylinder 40 is driven to move the holder 3
9 moves in the separating direction, and the gripping member 43 moves in the approaching direction by the opening / closing drive member 45. On the other hand, the bag 9
When 0 is the gusset bag F3, only the holder 39 moves in the separating direction. By these operations, the bag mouth 9 of the bag body 90 is opened.
The opening state of No. 1 is maintained, and filling and weighing of the contents are performed in this state.

(3) Content Filling / Measurement Step In filling and weighing the content, first, the elevator 54 is raised by the drive of the lifting / lowering motor 57 of the contact / separation drive device 16, whereby the holder unit 5 is moved to the position shown in FIG. From the solid line position to the chain line position. At this time, the control unit 15 detects the elevating position based on the number of rotations (number of pulses) of the elevating motor 57.

As a result, the filling nozzle 23 of the filling device 3 enters the bag 90 as shown in FIG. At this time, the weighing means 17 determines the total weight of the unit frame 38 in the holder unit 5, the holder device 13 and the bag mouth holding device 14 attached to the unit frame 38, and the empty bag body 90 as a reference value. That is, it is set to “0”.

After this setting, the elevator motor 57 is driven by the control of the control unit 15, and the entire holder unit 5 is lowered via the elevator 54. In conjunction with the lowering of the holder unit 5, the filling motor 24 of the filling device 3 is driven by the control of the controller 15 to
Is rotated to fill the contents in the hopper 22 with the filling nozzle 23.
From the lower end 23a of the bag. At the time of charging the contents, as shown in FIG.
3a is performed so as to maintain a non-contact state with the contents to be charged and filled in the bag body 90. For this reason, the control unit 15 adjusts the filling speed of the contents and the descending speed of the holder unit 5.

When the holder unit 5 is lowered, the control unit 15 measures the number of rotations (number of pulses) of the lifting / lowering motor 57 to grasp the lowered position. Then, during the lowering of the holder unit 5 near the lowermost position, the control unit 15 stops the elevating motor 57 to stop the lowering of the holder unit 5. By this stop, the weighing unit 17 moves the unit frame 38 of the holder unit 5 at the stop position and the holder device 1 attached to the unit frame 38.
3 and the bag mouth gripping device 14 and the bag body 90 in a state where the contents are filled.
Is measured and output to the control unit 15.

Thus, the control unit 15 calculates the shortage amount until the fixed amount is filled, and drives the filling motor 24 to drive the auger screw 2 with the holder unit 5 stopped.
5 is rotated to fill the bag 90 with the insufficient content. The weighing means 17 measures the weight of the content to be filled,
As described above, the unit frame 38, the holder device 13,
It is measured from the total weight of the bag mouth gripping device 14 and the bag body 90 in a state where the contents are filled, and when a fixed amount is filled, the signal is output to the control unit 15, and the control unit 15 stops the filling motor 24. . Thereby, the contents can be filled with the correct weight.

After the content is fixedly filled, the control unit 15 drives the elevating motor 57 to lower the holder unit 5 to the lowest position. At this lowermost position, the filling nozzle 23 comes out of the bag 90 and the filling of the contents is completed.

In this embodiment, the metering means 17 measures the constant filling of the contents. However, the control unit 15 can also perform the constant filling without measuring by the measuring means 17. In this case, the control unit 15 accurately knows the amount of the content dropped according to the rotation speed of the auger screw 25, and inputs the weight of the filled content when the holder unit 5 is stopped from the weighing unit 17. When the control unit 15
Is a filling motor 24 for rotating an auger screw 25
The number of rotations is controlled to perform filling up to a fixed amount. In this case, by using a motor such as a servomotor that can accurately control the number of rotations as the filling motor 24, the contents can be accurately filled as described above.

(4) Sealing Step of the Bag Mouth After the contents are fixedly filled, the bag catcher device 9 is operated. That is, the slide cylinder 70 (see FIG. 8) is driven, and the pair of catcher bars 64 moves in the direction of the bag body 90 from the solid line position to the chain line position in FIGS. At this time, the movable side folding member 73 also moves integrally.

The bag body 90 is a flat bag F1 and a bag F with a chuck.
In the case of 2, the folding device 8 does not operate, but in the case of the gusset bag F3, the folding device 8 operates before the bag catcher device 9 operates.

That is, when the bag body 90 is a gusset bag F3, as shown in FIG. 10, the folding cylinder 78 of the movable folding member 73 and the inner base 2 which have been moved to the bag body 90 together with the catcher bar 64. The folding cylinder 79 of the fixed-side folding member 74 being fixed is driven at the same time, and the respective folding pieces 76 and 77 are put into the bag 90.
At the same time in the directions of both end surfaces 93. Then, the folded pieces 76 and 77 that have advanced are both side end surfaces 93 of the bag body 90.
Acts to be folded inward. Thereby, even if both end surfaces 93 are opened by filling with the contents, the gusset-shaped shape can be regained because it is reliably folded. Therefore, the gusset bag F3 with improved appearance can be quickly and reliably formed.

Next, in the bag catcher device 9, the catcher bar 64 moves closer to the bag opening 91 of the bag 90.
After this, the holding of the bag body 90 by the holder 39 is released by the holding release cylinder 41 of the holder device 13, and the bag body 90 is delivered to and held by the catcher bar 64.

The catcher bar 64 holds the held bag body 90.
Is transported in the direction opposite to the above. A chuck closing device 7 is disposed in the middle of this conveyance, and the chuck closing roller 82 rolls while pressing both sides of the bag opening 91 of the bag body 90. Thus, when the bag body 90 is the bag F2 with a chuck, the chuck 94 is fitted and the bag opening 91 is closed by the rolling of the chuck closing roller 82. When the bag 90 is a flat bag F1 and a gusset bag F3, the bag 9
0 only passes between the chuck closing rollers 82.

When the catcher bar 64 reaches the transport end, the sealing device 10 descends, and the bag opening 91 of the bag body 90 is inserted between the seal bars 85. Then, the seal bars 85 approach each other to seal the bag mouth 91. In the case where the bag body 90 is the bag F2 with a chuck, the upper part of the bag mouth 91 is sealed more than the chuck 94.

After the sealing, the catcher bar 64 separates and releases the bag 90 from the holding state. As a result, the bag body 90 falls to a shooter (not shown) and is carried out of the machine.

In such an embodiment, the filling nozzle 2
While the holder 3 has entered the bag 90, the holder unit 5 and the filling device 3 move in the separating direction, and during this movement, the contents are filled into the bag 90 from the filling nozzle 23.
At the time of filling the contents, the measuring means 17 measures the weight of the contents to be filled from the weight of the entire holder unit 5. Therefore, unlike the case where the contents are filled after measuring the weight, the contents are directly filled into the bag body while measuring the weight, so that there is no adhesion loss of the contents during the filling. With such a configuration, since the weight of the contents to be filled in the bag body 90 can be accurately measured, the contents can be filled with high accuracy. In addition, since the contents are filled in a state where the filling nozzle 23 has entered the bag body 90, the contents are not soared around and the working environment is not deteriorated.

By controlling the filling speed of the filling device 23 and the separating speed of the contact / separation driving means 16, the tip 23a of the filling nozzle 23 is kept in non-contact with the contents filled in the bag body 90. Therefore, the contents filled in the bag body 90 do not adhere to the filling nozzle 23, and the loss due to the adhesion is eliminated. In addition to this, the filling nozzle 23
Weight does not affect the weight measurement of the contents. Therefore, the contents can be filled with high precision.

Further, in this embodiment, since the holder unit 5 is on the movable side, the structure for separating the holder unit 5 from the filling device 3 can be simplified, thereby easily controlling the separation movement. It can be carried out.

The present invention is not limited to the above embodiment, but can be variously modified. For example, filling nozzle 2
3 without inserting the auger screw 25 inside
You may use it as a cylindrical body. In this case, a screw-shaped rotating member is connected to the filling motor 24, and the contents are supplied to the filling nozzle 23 from the rotating member, thereby enabling highly accurate filling.

The holder unit 5 may be fixed and the filling device 3 may be movable. In this case, when the filling device 3 is raised, it can be separated from the holder unit 5. However, the present invention is not limited to this, and both the holder unit 5 and the filling device 3 may be moved. In this case, high-speed filling of the contents becomes possible.

Further, a position sensor may be attached in the middle of the moving path of the holder unit 5, and when the position sensor detects the holder unit, the separating movement may be stopped. In this case, since the control unit 15 does not need to know the moving distance of the holder unit 5, the circuit is simplified. Further, the holder unit 5 only needs to hold the bag body 90 in a suspended state, and therefore, the bag mouth holding device 14 may be omitted as the holder device 13 alone.

[0081]

According to the first aspect of the present invention, since the contents are directly filled into the bag while measuring the weight, there is no adhesion loss of the contents during the filling, and the contents to be filled into the bag. Since the weight of an object can be measured accurately, filling can be performed with high accuracy.In addition, since the filling nozzle is used to fill the contents with the filling nozzle penetrating into the bag body, it does not fly up around and reduces the working environment. No worsening.

According to the second aspect of the present invention, since the filling weight of the contents is measured by the weight of the entire holder unit using the empty state of the bag as a reference value, the filling amount can be measured with high accuracy.

According to the third aspect of the present invention, since the filling amount of the contents is measured during the movement in the separating direction, it is possible to perform filling with high accuracy without excess or deficiency.

According to the fourth aspect of the present invention, since the tip of the filling nozzle is not in contact with the contents, the contents do not adhere to the filling nozzle, and the loss due to the adhesion is eliminated. The weight of the filling nozzle does not affect the weight measurement of the contents, and the contents can be filled with high accuracy.

According to the fifth aspect of the present invention, the structure of the separation movement between the holder unit and the filling device is simplified, so that the separation movement can be easily controlled.

According to the invention of claim 6, the filling amount of the contents can be measured quickly and accurately.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire embodiment of the present invention.

FIG. 2 is a front view showing an entire embodiment of the present invention.

FIG. 3 is a side view showing a bag supply device and a bag pool device.

FIG. 4 is a side view showing a holder unit.

FIG. 5 is a front view showing a holder unit.

FIG. 6 is a plan view showing a holder unit.

FIG. 7 is a front view showing the bag mouth holding device.

FIG. 8 is a plan view showing a bag catcher device and a folding device.

FIG. 9 is a front view showing the bag catcher device.

FIG. 10 is a plan view showing the operation of the bag catcher device and the folding device.

FIG. 11 is a front view showing the operation of the bag catcher device and the folding device.

FIG. 12 is a front view showing a chuck closing device.

FIG. 13 is a plan view showing a sealing device.

14A is a perspective view of a flat bag, FIG. 14B is a perspective view of a bag with a chuck, and FIG. 14C is a perspective view of a gusset bag.

FIG. 15 is a perspective view showing an open state of the bag.

[Explanation of symbols]

 Reference Signs List 3 filling device 5 holder unit 6 bag mouth holding device 7 chuck closing device 11 gas nozzle 13 holder device 14 bag mouth holding device 15 control unit 16 contact / separation driving device 17 measuring means 23 filling nozzle 43 holding member 90 bag body 91 bag mouth

Claims (6)

[Claims] 1. A holder unit having at least a holder device for opening and closing a bag mouth of a bag body while holding the bag body in a suspended state, and a filling nozzle capable of entering the bag body from the bag mouth. A filling device for filling the contents from the filling nozzle into the bag body in a state of intrusion, and the holder unit and the filling device are relatively approached so that the filling nozzle enters the bag body so that the filling nozzle comes out of the bag body. A contact / separation drive device for relatively separating the holder unit and the filling device from each other; a weighing means for measuring the weight of the contents to be filled in the bag from the weight of the entire holder unit in the suspended state of the bag; When the filling device is moved in the separating direction, the bag is filled with the contents, and the filling device is controlled so that the filling of the contents is stopped when the fixed amount is reached. Filling weighing apparatus to the bag body, characterized in that it comprises a control means. 2. The method according to claim 1, wherein the weighing means measures the weight of the contents filled in the bag with the weight of the entire holder unit with the weight of the entire holder unit when the bag is empty as a reference value. The filling and weighing device for bags according to claim 1. 3. The control means stops the movement of the holder unit or the filling device during the movement in the separating direction,
The filling and weighing device according to claim 1, wherein the filling device is controlled such that the contents are filled into the bag until a fixed amount is obtained based on the measured value from the weighing means in the stopped state. 4. The control means controls the filling speed of the filling device and the separating speed of the contact / separation driving means such that the tip of the filling nozzle keeps a non-contact state with the contents filled in the bag body. The filling and weighing device for bags according to claim 1, characterized in that: 5. The bag according to claim 1, wherein the filling device is on a fixed side, and the holder unit is on a movable side connected to contact / separation driving means. Filling and weighing device. 6. The apparatus according to claim 1, wherein the weighing means is a load cell provided at a connection portion between the holder unit and the contact / separation driving means. .