JPH06329102A - Fixed quantity filling device for powder and its related device - Google Patents

Abstract

PURPOSE:To provide a fixed quantity filling device for powder which can perform a fixed quantity filling work of a powder of a high precision and high efficiency without using manual work. CONSTITUTION:A carrying device 1 which carries a bag W to contain a powder under a condition in which the opening of the bag W faces upward, an opening- forming device 2 to open the bag W which is carried by the carrying device 1 under a folded condition, and a rough scaling device 4 which takes a powder with a volume to be less than a specified filling quantity from a hopper 3 which stores the powder P by bulk and fills the powder in the bag W which is opened by the opening-forming device 2 are provided. In addition, a precise scaling device 5 which feeds the powder into the bag W from the hopper 3 until the powder in the bag W reaches the specified filling quantity while scaling the weight of the powder being filled in the bag W, and a sealing device 7 to seal the bag W in which the powder of the specified filling quantity has been filled are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for packing a certain amount of powder such as matcha into a bag and its related device.

[0002]

2. Description of the Related Art As a device for taking out a required amount of powder stored in a hopper, as shown in FIG.
Is measured by a weighing machine G, the powder P is dropped into the bag W by the screw auger S provided in the hopper H, and the screw auger S is stopped when the weight of the bag W increases by a specified amount. As shown in FIG. 24 (b), while the weight of the hopper H is weighed by the weighing machine G, the powder discharge pipe H1 of the hopper H is vibrated by the vibrator B to drop the powder P into the bag W, and There is a loss-in-weight type that stops vibration when the weight decreases by a specified amount. As shown in FIG. 24 (c), some of the loss-in-wait type devices discharge the powder P by a screw auger S instead of the vibrator.

[0003]

In the above-mentioned device, when the rotational speed of the screw auger S and the vibration acceleration of the vibrator B are increased, the filling speed of the powder P is increased, but the weighing accuracy is deteriorated. On the contrary, if the rotation speed of the screw auger S and the vibration acceleration of the vibrator B are reduced, the weighing accuracy is improved, but it takes time to fill the powder P and the efficiency is deteriorated. Moreover, since the apparatus described above only fills the powder P, the work of opening the folded bag W in preparation for bag filling and the work of sealing the bag W after powder filling must be left to manual work. I don't get.

An object of the present invention is to perform a powder quantitative filling operation,
An object of the present invention is to provide a powder quantitative filling device and its related device that can be performed with high accuracy and high efficiency without entrusting to manual work.

[0005]

According to a first aspect of the present invention, there is provided a powder quantitative filling device, comprising a transfer means for transferring a bag for storing powder and a folded state. The expansion means for expanding the bag transferred by the transfer means, and the powder having a volume smaller than the specified filling amount from the hopper storing the powder are bulked and expanded by the expansion means. Rough filling means for filling the bag, and precise filling for feeding the powder from the hopper to the bag until the powder in the bag reaches a specified filling amount while weighing the powder filled in the bag. Means, and a sealing means for sealing the bag filled with the powder of the specified filling amount. According to a second aspect of the present invention, in a bag transporting device for transporting the bag with its opening facing upward, a guide rail having a transport surface having a cross-sectional shape along the bottom shape of the bag when the bag is opened. And an expansion forming means that is provided so that it can be inserted into and removed from the bag, and that when the bag is inserted, the bottom part of the bag is pressed against the conveying surface of the guide rail, and the expansion forming means. And a transfer unit that transfers the bag expanded by the method along the guide rail in a state of standing on the transfer surface of the guide rail. According to the invention of claim 3, in a powder collecting device for collecting a fixed amount of powder from a powder dropping port of a hopper containing the powder, a collecting member having a recess for containing the powder. There is provided a bulking member driving means for driving the bulking member such that the concave portion is brought into sliding contact with the powder dropping port of the hopper while being brought into contact with and separated from the powder dropping port. According to a fourth aspect of the present invention, in a powder filling device for filling a bag with a fixed amount of powder, the fixed amount of powder is provided inside the bag so that the powder can be inserted into and removed from the bag. The nozzle to be inserted and the lower end opening of the nozzle is closed when the nozzle is released from the bag, and the lower end opening of the nozzle is opened and the bag is opened when the nozzle is inserted into the bag. And a nozzle opening / closing member that abuts on the inner peripheral side of the opening and expands the opening. According to the invention of claim 5, the powder supply nozzle is provided so that it can be inserted into and removed from the powder storage bag, the weighing means for weighing the powder filling amount into the bag, and the nozzle are provided. A bag opening member that abuts on the inner peripheral side of the opening of the bag when the bag is opened into the bag and expands the opening larger than the nozzle diameter, and the bag opening member is the weight of the weighing means. It was installed within the detection range. According to a sixth aspect of the invention, in the powder filling apparatus according to the fifth aspect, a pair of the bag opening members are provided so as to sandwich the center line of the nozzle.
Then, in the pair of bag opening members, when inserted into the bag, an internal force is generated so as to sufficiently open the bag until the portion of the opening of the bag that does not come into contact with each bag opening member expands to the outer peripheral side of the bag. An internal force applying portion was formed. According to the invention of claim 7, in a powder guiding device provided with a tube body for guiding powder, a wire-shaped adhesion preventing member is arranged inside the tube body along an inner wall of the tube body. At the same time, the tubular body was provided so as to be rotatable around its axis.

[0006]

According to the invention of claim 1, after the bag in the folded state transferred by the transfer means is expanded by the expansion means, a predetermined volume of powder is bulk-collected from the hopper by the rough packing means and filled into the bag. Then, the fine filling means fills the powder to a specified amount. The bag filled with the specified amount of powder is sealed by the sealing means. According to the second aspect of the present invention, the bottom of the bag pressed against the conveying surface of the guide rail by the expansion forming means is formed according to the cross-sectional shape of the conveying surface, and the bag is self-supporting on the conveying surface. The self-standing bag is transferred along the guide rail by the transfer means. According to the third aspect of the invention, when the concave portion is separated from the powder dropping port, the powder contained in the concave portion is scraped off at the powder dropping port, and the volume of the powder in the concave portion is adjusted to a constant amount. In the invention of claim 4, when the nozzle is removed from the bag, the lower end opening of the nozzle is closed by the nozzle opening / closing member, and the powder is accumulated in the nozzle. When inserting the nozzle into the bag, the nozzle opening / closing member spreads the opening of the bag to ensure that the nozzle is inserted into the bag, and the lower end opening of the nozzle is opened and stored inside the nozzle. Powder is put into the bag at once. According to the fifth aspect of the invention, when the nozzle is inserted into the bag, the bag opening member expands the opening of the bag larger than the nozzle to prevent contact between the nozzle and the bag. Since the bag opening member is attached within the weight detection range of the weighing means, the detection weight of the weighing means does not change due to the separation and contact of the bag opening member and the bag. In the invention of claim 6, the entire opening of the bag, including the portion of the opening of the bag that does not come into contact with each bag opening member, swells to the outside of the bag to prevent contact with the nozzle. In the invention of claim 7, it is not necessary to provide drive means for rotating the adhesion preventing member in the nozzle at both ends of the nozzle or in the nozzle.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the quantitative filling device of this embodiment includes a transfer device 1 for transferring the bag W from one end to the other end of the device, an expansion molding device 2 for expanding and molding the bag W, and a hopper 3. A coarse weighing device 4 that bulk-collects a certain amount of powder P from the above and fills the bag W, and a precise weighing device 5 that fills a prescribed amount of the powder P.
And a tapping device 6 for tapping the bag W and a sealing device 7 for sealing the bag W.

As shown in FIGS. 1 to 3, the transfer device 1 is
It has a guide rail 10 that guides the bag W, and a chain 14 that is wound between a pair of sprockets 11 and 12 and that is run parallel to the guide rail 10 by a motor 13. As shown in detail in FIG. 3, the guide rail 10
The upper surface 100 is formed as an inclined surface having a downward slope toward the center side, and a groove 101 into which the seal portion W2 on the bottom side of the bag W is inserted is formed at the center thereof. As shown in detail in FIGS. 2 to 4, plate-like claws 140 extending in a direction orthogonal to the longitudinal direction of the guide rail 10 are fixed to the chain 14 at regular intervals. One end 102 of the guide rail 10
Bag W supplied to the side bag receiving position L1 (see FIG. 1)
Stands upright on the upper surface 100 as shown in FIG.
With the claw 140 facing upwards while being guided by the groove 101.
It is pushed by and moves on the guide rail 10 toward the other end 103 (see FIG. 1). Hereinafter, in each drawing, the transfer direction of the bag W is indicated by an arrow C _F. In FIG. 1, the intervals between the bag receiving position L1 and the expansion molding device 2 and the stop positions L2 to L7 of the bag W corresponding to the sealing device 7 are partially unequal intervals. The intervals L1 to L7 are equal. The mounting pitch of the claws 140 is set equal to the pitch of the positions L1 to L7.

As shown in FIG. 5, each stop position L2-L7
A stopper cylinder 15 is arranged in the. The rod 150 of the stopper cylinder 15 projects into the moving path of the bag W and contacts the upper portion of the bag W, thereby keeping the bag W at a predetermined stop position L2.
Position to ~ L7. Here, since the rod 150 is brought into contact with the upper side of the bag W, even if the bag W pushed by the claw 140 tilts due to sliding resistance with the guide rail 10 as shown in FIG. The posture of the bag W is corrected by and the bag W is surely erected upright.

As shown in FIG. 1, the guide rail 10 is
Five blocks 1 are separated before and after the stop positions L5 and L6 corresponding to the precise weighing device 5 and the tapping device 6.
It is divided into 0a to 10e. Then, as shown in FIG. 7, the blocks 10b to 10e are upstream in the transfer direction (see FIG. 1).
A taper portion 104 is formed at an end portion (on the left side of FIG. 2) to prevent the bag W from being caught during transfer (see FIGS. 2, 7, and 19).

As shown in FIG. 8, a bag holder WH for storing a large number of bags W in a folded state is arranged above the bag receiving position L1 of the guide rail 10. From this bag holder WH, the bag W is folded at its fold W4 by a suction pad (not shown).
Are supplied onto the guide rail 10 in a state in which they are oriented in the transfer direction. Between the bag receiving position L1 of the guide rail 10 and the stop position L2 of the expansion molding device 2, a pair of guide plates 16 that sandwich the upper portion of the folded bag W are disposed (see FIG. 2), and the bag W Is guided by the guide plate 16 and the groove 101 and is transferred to the stop position L2. In order to prevent the bag W from falling, the groove 101 needs to be formed as a groove with a bottom between the bag receiving position L1 and the stop position L2. After the stop position L2, the groove 101 may be penetrated into the lower surface of the guide rail 10 to prevent accumulation of dust and the like in the groove 101.

As shown in FIGS. 8 and 9, the expansion molding apparatus 2 includes a pair of vacuum suction pads 20 arranged so as to sandwich the upper portion of the bag W at the stop position L2, and the guide rail 1.
It has an air cylinder 22 mounted in the recessed portion 105 of 0 facing the fixed pad 21, an embossing member 23 arranged above the stop position L2, and a pair of substantially trapezoidal flat plate-like bag opening metal fittings 24. A pair of vacuum suction pads 20
Vacuates the bag W transferred to the stop position L2, and moves it in a direction away from each other (direction Y1 in the drawing) by an actuator (not shown) to expand the opening W3 of the bag W. The air cylinder 22 cooperates with the fixed pad 21 to sandwich the seal portion W2 of the bag W, so that the bag W can move freely when the embossing member 23 is inserted into the bag W and the bag W when the embossing member 23 is removed. To prevent the rise of.

The embossing member 23 has a tapered portion 230 at the lower end.
It has a prismatic inner mold 230 in which a is formed, and a hollow prismatic outer mold 231 externally inserted in the inner mold 230. Inner mold 23
The 0 and the outer mold 231 can be respectively moved up and down in the axial direction by separate air cylinders (not shown), and at the time of lowering, first, a state (tapered portion 230
a is projected from the outer die 231) and is inserted into the bag W,
Only the outer die 231 further descends after being fully lowered to the lower end, and the bottom of the bag W is pressed against the upper surface 100 of the guide rail 10 to perform expansion molding. 232 is an air vent hole provided in the center of the inner mold 230.

As shown in FIGS. 10 and 11, the bag opening metal fitting 24 is rotatably attached to the frame 240 via a hinge 241 and has a horizontal position in which the ends thereof are superposed by a spring (not shown) (in the figure). It is held at the solid line position). As shown by the two-dot chain line in the figure, the embossing member 23 is a bag W.
When descending toward, the bag opening metal fitting 24 is pushed by the inner mold 230 and pivots downward, abuts against the fold W4 of the bag W from the inside, and pushes the bag W open.

As shown in FIG. 1, the hopper 3 has a blade 30 for stirring the powder P (for example, matcha tea) stored therein, a motor 31 for rotating the blade 30, and a hopper 3 rotating integrally with the blade 30. And a coil spring 32 for scraping off the powder P adhering to the inner wall of the. At the bottom of the hopper 3, cylindrical powder drop ports 33 and 34 are formed.

As shown in FIGS. 12 and 13, the coarse weighing device 4 includes a disk-shaped bulk collecting box 40 disposed below the hopper 3, and a bulk collecting box 40 coaxially arranged with the bulk collecting box 40.
Has a fixed disk 41 that is in close contact with the lower surface of the nozzle, a nozzle 42 that is attached to the lower surface side of the fixed disk 41, and a nozzle shutter 43 that is arranged below the nozzle 42. Bulky box 4
At 0, four powder storage holes 400 are formed rotationally symmetrically around the rotation shaft 401. These powder storage holes 400
Accommodates the powder P that is sequentially delivered to the position immediately below the powder drop opening 33 as the motor 402 rotates about the rotary shaft 401 of the bulk collecting box 40 and drops from the powder drop opening 33. With the rotation of the bulk collecting box 40, the powder storage hole 400
The upper edge is in sliding contact with the lower end of the powder drop opening 33, whereby the powder P in the powder containing hole 400 is scraped off at the lower end of the powder falling hole 33, and the powder containing hole 400 has a certain volume of powder. P is bulked. Reference numeral 403 is a sleeve that is detachably fitted in the powder storage hole 400 to adjust its volume. The inner peripheral surface 404 of the sleeve 403 is a conical surface whose diameter increases toward the fixed disc 41. This is the inner peripheral surface 40 of the powder P.
This is because the sleeve 403 is prevented from adhering to the sheet 4, and is used as a handle when the sleeve 403 is bulky and pulled out above the box 40.

The fixed disk 41 is held stationary with respect to the rotation of the bulk collecting box 40, and has a single powder discharge hole 4
Have 10. The powder discharge hole 410 is formed on the same circumference as the powder storage hole 400 of the bulk collecting box 40 and immediately above the stop position L4. The powder P stored in the powder storage hole 400 of the bulk collecting box 40 is transferred to the nozzle 42 through the powder discharge hole 410.
Fall to. When the powder P adheres to the powder storage hole 400 and the like, as shown in FIG.
A pad 440 that is moved up and down by an actuator 44 such as an air cylinder may be provided above the pad and the powder P may be scraped off by pushing the pad 440 from the powder storage hole 400 to the powder discharge hole 410.

As shown in detail in FIG. 13, the nozzle 42 is a funnel-shaped inner cylinder 420 rotatably attached to the lower surface side of the fixed disk 41 via a bearing 411, and the inner cylinder 42.
An outer cylinder 421 that is fitted around the outer circumference of 0 and can be extended below the inner cylinder 420 by an actuator (not shown). The inner cylinder 420 is connected to the motor 42 via a belt 422.
It is rotationally driven by 3. Further, inside the inner cylinder 420, a wire 424 hanging from the fixed disk 41 is arranged along the inner peripheral surface. This wire 424 and inner cylinder 4
As a result of relative rotation with respect to 20, the inner cylinder 42 as shown in FIG.
The lump Pm of the powder P adhering to the inside of 0 is crushed. The adhesion of the powder P to the wire 424 is blocked by the vibration of the wire 424 caused by the rotation of the inner cylinder 420.

As shown in FIGS. 13 and 16, the nozzle shutter 43 has four substantially trapezoidal flat plate-shaped shutter blades 432 rotatably attached to the frame 430 via a hinge 431. These shutter blades 432 are held by a spring (not shown) at a horizontal position (positions in FIG. 13) where their tips overlap each other. At this time, as shown in FIG. 16, the lower end opening of the outer cylinder 421 of the nozzle 42 is closed by the shutter blades 432. Therefore, FIG.
In the state where the outer cylinder 421 is retracted to the inner cylinder 420 side as shown in (a), the powder P is stored in the inner cylinder 420.

When the outer cylinder 421 is extended below the inner cylinder 420 as shown in FIG.
2 is pushed by the outer cylinder 421 to rotate downward, and the stop position L4
The opening W3 of the bag W is pushed open from the inside, whereby the lower end of the outer cylinder 421 is surely inserted into the bag W. At the same time, the powder P stored in the inner cylinder 420 is in the bag W.
Is thrown in. The spring that holds the shutter blades 432 in the horizontal position needs to have a force capable of counteracting the weight of the powder P fed into the inner cylinder 420.

As shown in FIG. 18, the precise weighing device 5 has a toothed belt 50 for horizontally conveying the powder P falling from the powder dropping port 34 of the hopper 3 toward the stop position L5 side, and an actuator 510. It has a scraping plate 51 that swings around the shaft 511, and a nozzle 52 that guides the powder P falling from the tip of the toothed belt 50 to the bag W at the stop position L5. The nozzle 52 is, like the coarse weighing device 4 shown in FIG. 13, a funnel-shaped inner cylinder 520 rotatably attached to the frame 53 via a bearing 530, and an inner cylinder 520.
The outer cylinder 5 fitted on the outer circumference of the small diameter portion on the lower end side of the outer cylinder 5 and capable of being extended below the inner cylinder 520 by an actuator (not shown)
21 and. The inner cylinder 520 is rotationally driven by a motor 523 via a belt 522. Inside the inner cylinder 520, a wire 524 hanging from the frame 53 is arranged along the inner peripheral surface, and the relative rotation between the wire 524 and the inner cylinder 520 causes the powder P to adhere to the inner cylinder 520. Is blocked.

As shown in FIGS. 18 and 19, the block 10b corresponding to the stop position L5 of the guide rail 10 is shown.
Is fixed on the weighing pan 540 of the electronic balance 54 via a shaft 541. Frame 5 on one side of block 10b
5 is fixed, and a pair of bag opening fittings 56 and a solenoid 57 for driving them are fixed to the upper end of the frame 55. The details of the bag opening fitting 56 will be described later.

The electronic balance 54 detects the weight of the powder P in the bag W by subtracting the weights of the block 10b, the frame 55, the bag opening metal fitting 56, the solenoid 57 and the bag W from the load on the weighing pan 540. The detected weight of the powder P is output to a control device (not shown), and the control device controls the traveling speed of the toothed belt 50 and the position of the grinding plate 51 according to the weight of the powder P. That is, when the difference between the weight of the powder P in the bag W and the target filling amount is large, the fraying plate 51 and the conveying surface 50 are provided.
Maintain a large gap with 0. When the difference between the weight of the powder P and the target filling amount decreases below a certain value, the scraping plate 51
Is moved toward the transport surface 500 to reduce the thickness of the powder P on the transport surface 500. Finally, the conveying surface 500 and the scraping plate 51 are brought into contact with each other so that the powder P is conveyed only by the recessed portion of the toothed belt 50, and the traveling speed of the toothed belt 50 is also reduced to feed the amount of the powder P. The adjustment range is refined and the weighing accuracy is improved.

As shown in FIGS. 19 to 21, the bag opening metal fitting 56 has a shape forming a part of a cylindrical surface inscribed in the bag W, and is rotatably attached to the frame 55 via a shaft 560. There is. The tip of the shaft 560 projects from the frame 55, and the actuator 57 is connected via a power transmission mechanism (not shown).
Connected with. The power transmission mechanism transmits the operation of the actuator 57 to the shaft 560 as rotations in opposite directions to each other by, for example, a pair of gears, whereby the pair of bag opening metal fittings 56 are moved to the horizontal position shown in FIG. It rotates synchronously with the upright position shown at 20. 19 and 20
As shown in Fig. 5, when rotating to the upright position, the bag opening metal fitting 5
6 is inserted into the opening W3 of the bag W at the stop position L5 and the bag W
Push open.

The opening / closing operation of the bag opening fitting 56 is controlled by a control device (not shown) in conjunction with the forward / backward movement of the outer cylinder 521 of the nozzle 52. That is, as shown in FIG.
When 1 is retracted to the inner cylinder 520 side, the bag opening fitting 56 rotates to the horizontal position. When the outer cylinder 521 is lowered, the bag opening fitting 56 is rotated to the upright position prior to the lowering of the outer cylinder 521. At this time, as shown in FIGS. 20 and 21, a gap is formed between the bag opening metal fitting 56 and the outer cylinder 521 to prevent contact between the bag W and the bag opening metal fitting 56 and the outer cylinder 521.

As shown in FIG. 1 and FIG. 22, in the tapping device 6, a block 61d of the guide rail 10 is rocked up and down by a cam 61 which is rotationally driven by a motor 60 to make the density of the powder P in the bag W uniform. Turn into Also, FIG.
As shown in, the sealing device 7 seals the bag W by welding the opening W3 of the bag W with the pair of heating heads 70.

Next, the filling operation of the powder P in the quantitative filling device of this embodiment will be described. As shown in FIG. 8, when the bag W is supplied from the bag holder WH to the bag receiving position L1,
The transfer device 1 transfers the bag W to the stop position L2 of the expansion molding device 2 and stops it. A new bag W is supplied to the bag receiving position L1 that has become empty due to this transfer, and thereafter, a new bag W is continuously supplied to the bag receiving position L1 in the same manner.

When the bag W reaches the stop position L2, the expansion molding device 2 expands the opening W3 of the bag W by the vacuum suction pad 20, and the seal W2 of the bag W is fixed to the air cylinder 22 and the fixed pad 21. Hold with and. Then, the inner mold 230 and the outer mold 231 of the mold pressing member 23 are lowered to insert them into the bag W through the taper portion 230a. After the inner die 230 reaches the bottom of the bag W, only the outer die 231 is lowered alone, and the center and outer periphery of the bottom W1 of the bag W are pressed against the upper surface 100 of the guide rail 10 as shown by the solid line in FIG. The bottom W1 is formed into a constant shape. After the bag W is molded, the expansion molding device 2 raises both the inner mold 230 and the outer mold 231 and projects the taper portion 230a in preparation for the next expansion, as indicated by the chain double-dashed line in FIG. Stand by. After that, each time the bag W reaches the stop position L2, the expansion molding device 2 expands the bag W in the same procedure.

The bag W formed into a fixed shape by the expansion molding device 2 is transferred by the transfer device 1 to the stop position L4 of the rough weighing device 4. The coarse weighing device 4 rotates the bulk collecting box 40 to bulk collect a fixed volume of the powder P from the hopper 3. Then, as shown in FIG. 17A, the bulky powder P is covered with shutter blades 432 and the inner cylinder 420 of the nozzle 42 is closed.
It is thrown in and the desired amount of powder P is stored. The volume of the powder P at this time is 80 to 90 which is the target filling amount of the powder P in the bag W.
Adjusted to%. When the above-mentioned charging amount cannot be obtained with the single powder storage hole 400, the powder P of the plurality of powder storage holes 400 is charged into the nozzle 42. For these, the number of the powder storage holes 400 according to the type of the desired charging amount may be registered in advance in the control unit (not shown) of the apparatus, and the number may be selected according to the operation mode.

A desired amount of powder P is accumulated in the nozzle 42,
And when the bag W stops at the stop position L4, the coarse weighing device 4
Lowers the outer cylinder 421 of the nozzle 42. This allows
As shown in FIG. 17B, while the shutter blade 432 pushes the bag W open, the outer cylinder 421 is inserted into the bag W, and the powder P is filled in the bag W. After the powder P is dropped, the outer cylinder 421 is fed to the inner cylinder 420 side in preparation for filling the next bag W.
As a result, the shutter blades 432 return to the horizontal position and the lower end opening of the nozzle 42 is closed. After that, each time the bag W reaches the stop position L4, the rough weighing device 4 uses the same procedure as described above to transfer the powder P having a constant volume bulked from the hopper 3 to the bag W.
To fill.

The bag W filled with a certain amount of the powder P by the coarse weighing device 4 is transferred by the transfer device 1 to the stop position L5 of the precise weighing device 5. The precise weighing device 5 is shown in FIG.
As shown in FIG. 9, the bag opening metal fitting 56 is rotated to the upright position to push open the opening W3 of the bag W. Thereafter, as shown in FIG. 20, the outer cylinder 521 of the nozzle 52 is lowered to insert the lower end portion thereof into the bag W, and the toothed belt 50 (FIG. 18).
Is activated to transfer the powder P falling from the powder drop port 34. As a result, the powder P is put into the bag W from the tip of the toothed belt 50. The weight of the powder P in the bag W is the electronic balance 5
4 and the toothed belt 50 as described above according to the difference between the present weight detected and the target filling amount of the powder P.
The traveling speed and the position of the fray plate 51 are adjusted.

When the weight of the powder P in the bag W reaches the target filling amount, the toothed belt 50 stops and the feeding of the powder P is stopped. After that, the outer cylinder 521 is retracted to the inner cylinder 520 side, and subsequently the bag opening fitting 56 is rotated to the horizontal position. After that, the precise weighing device 5 fills the powder P with the same procedure as described above until the target filling amount is reached, each time the bag W reaches the stop position L5.

The bag W filled with the target filling amount of the powder P by the precise weighing device 5 is transferred to the stop position L6 of the tapping device 6 by the transfer device 1 and tapped, and then the stop position of the sealing device 7. After being transferred to L7, the opening W3 is sealed. The sealed bag W is discharged from the other end 103 of the guide rail 10 of the transfer device 1.

As described above, in the apparatus of this embodiment, a series of operations from the opening operation of the folded bag W to the filling of the powder P to the sealing are continuously performed, so that the labor is saved. To improve work efficiency and cost. In addition, when filling the powder P, first, most of the target filling amount of the powder P is bulk-collected by the coarse weighing device 4 and put into the bag W at a time, and then the target is measured by the precise weighing device 5. Since the filling is performed while weighing the powder P in a range very close to the filling amount, it is possible to reduce the time required for the filling and maintain the weighing accuracy with high accuracy. Since the coarse weighing device 4 and the precise weighing device 5 are separately provided, a certain volume of the powder P can be put into the next bag W while the filling amount is adjusted by the precise weighing device 5. Work efficiency is further improved.

The transfer device 1, the expansion molding device 2, the rough weighing device 4 and the precise weighing device 5 described in the present embodiment are not used only in the combination thereof, but may be used alone or in any combination. You can use it. Here, the function and effect of the unique configuration of each device will be described.

In the transfer device 1 and the expansion molding device 2, since the bag W is pressed against the upper surface 100 of the guide rail 10 by the embossing member 23 to mold the bottom portion W1 of the bag W, the bag W is self-supporting on the guide rail 10. Then, the bag W can be easily and reliably transferred by simply pushing the bag W with the claw 140. As a method of transporting this type of bag W, a method of transferring the bag W together with the pad 20 while the bag W is being sucked by the vacuum suction pad 20 has been attempted in the past, but with such a method, the mechanism of the device is complicated. However, the bag W may be deformed during transfer and the bag W may fall. In this respect, the device of this embodiment has a simple mechanism, and there is no possibility of dropping even if the bag W is deformed, and the device has high reliability.

In the coarse weighing device 4, by rotating the bulk collecting box 40, the powder P in the powder storage hole 400 is simply abraded by the powder dropping port 33 of the hopper 3, and the fixed amount of the powder P is swiftly and reliably obtained.
Is bullied. After the desired amount of powder P is once stored in the nozzle 42, the lower end of the nozzle 42 is sufficiently inserted into the bag W to drop the powder P from the nozzle 42 into the bag W, so the nozzle is inserted into the bag. The scattering of the powder P is suppressed as compared with the case where the powder P is dropped without the powder P or the powder P is bulk-dropped and dropped into the bag W all at once from the box. Therefore, the bag W
It prevents powder from adhering to the outside, clogging of the device and malfunction of the sensor.

Further, as shown in FIG. 24, in the device for continuously filling the powder P little by little, the supply amount of the powder P per unit time is stable due to the fluctuation of the powder adhesion amount to the screw auger S or the like. Without doing so, it is difficult to control the filling amount of the powder P and overfilling may occur. However, in the rough weighing device 4 of the present embodiment, a large amount of the powder P is once transferred from the hopper 3 to the bulk collecting box 40. Similarly, since a large amount of powder P is dropped from the bulk collecting box 40 to the nozzle 42 and from the nozzle 42 to the bag W at the same time, the influence of the powder adhesion is unlikely to occur. Even if the powder P adheres, the error always appears as a decrease in the filling amount into the bag W. Therefore, the quantitative filling of the powder P can be performed by combination with a device that can precisely adjust the supply amount of the powder P. It can be done precisely and quickly.

In the precise weighing device 5, the bag opening metal fitting 56 is provided within the weight detection range of the electronic balance 54, which results in high precision while preventing scattering of the powder P and clogging of the nozzle 52. In addition, the effect that the filling amount of the powder P can be adjusted is produced. That is, assuming that the bag opening metal fitting 56 is not provided, an error occurs in the weight detection value when the bag W and the nozzle 52 come into contact with each other. Therefore, the powder P may be dropped without inserting the nozzle 52 into the bag W, or It is necessary to make the nozzle 52 as thin as possible and insert it into the bag W. However, in the former case, the amount of dust generated when handling the powder P having a strong scattering property becomes excessive, and in the latter case, the nozzle 52 is likely to be clogged when handling the powder P having a strong adhesive property. In this respect, if the bag opening metal fitting 56 is provided in the weight detection range, the bag opening metal fitting 56 is inscribed in the bag W and the bag W
Since the nozzle 52 can be forcibly pushed open, the nozzle 52 can be deeply inserted into the bag W while avoiding contact between the nozzle 52 and the bag W without reducing the diameter of the nozzle 52.

The bag opening fitting 56 may be a set of four flat plates like the nozzle shutter 43 of the rough weighing device 4.
However, according to the embodiment, there is an advantage that the contact between the bag W and the nozzle 52 can be prevented with the minimum required number. That is, FIG.
As shown in FIG. 1, in the embodiment, both end portions 5 of the bag opening metal fitting 56 are
Due to 61, the bag opening metal fitting 56 is provided at a portion of the opening W3 of the bag W that does not come into contact with the bag opening metal fitting 56 (the portion of the fold W4 in the figure).
The tension Ft along the circumferential direction acts on the fold W4.
An internal force Fr in the radial direction that inflates the bag W to the outside of the bag W is generated, and the bag W is separated from the nozzle 52. If the number of bag opening metal fittings 56 is small, the drive mechanism thereof will be simple. Although the bag opening metal fitting 56 is curved to have a constant curvature in the embodiment,
Only both end portions 561 may be curved or bent. However, in order to secure the diameter of the nozzle 52 as large as possible, it is desirable that the bag opening metal fitting 56 also has a shape along the outer peripheral surface of the nozzle 52. The bag opening metal fittings 56 may be arranged so as to be shifted by 90 ° in the horizontal direction, and the fold W4 of the bag W and the bag opening metal fitting 56 may be brought into close contact with each other to surely push the fold W4 open.

In the embodiment, the nozzles 42 and 52 and the wire 42 are used.
The relative rotation with 4, 524 prevents the powder P from adhering. However, since the nozzles 42, 52 are rotated at this time, the upper ends of the nozzles 42, 52 are largely opened to increase the supply amount of the powder P. It is possible to secure the powder P for the nozzles 42 and 52.
Also, the restriction on the layout of the supply path is eliminated. By the way, if the wires 424 and 524 are rotated, it becomes necessary to provide a motor or the like for driving the nozzles 42 and 52 on the upper end side, the opening areas of the nozzles 42 and 52 cannot be made large, and the powder P There are also large restrictions on supply routes.

In the apparatus of the embodiment, a tapping device may be provided at the stop position L4 of the coarse weighing device 4 and the powder P may be put into the bag W while tapping. Then,
Since the powder P in the bag W is packed under the bag W and the center of gravity of the bag W is lowered, the transfer of the bag W between the stop positions L4 to L6 is more stable.

In the correspondence between the above embodiment and claim 1, the transfer device 1 is the transfer means, the expansion molding device 2 is the expansion means, the coarse weighing device 4 is the coarse filling device, and the precise weighing device 5 is. The precise filling means and the sealing device 7 constitute the sealing means. In correspondence with claim 2, the upper surface 100 of the guide rail 10
Represents the conveying surface of the guide rail, the embossing member 23 constitutes the expansion forming means, and the chain 14 and the claw 140 constitute the transfer means. According to the third aspect, the powder dropping port 33 is the powder dropping port, the bulk collecting box 40 is the bulk collecting member, the powder storing hole 400 is the recess of the bulk collecting member, and the motor 402 is the bulk collecting member. It constitutes a driving means. According to the fourth aspect, the nozzle 42 constitutes a nozzle and the nozzle shutter 43 constitutes an opening / closing member. According to claims 5 and 6, the nozzle 52 constitutes a powder supply nozzle, the electronic balance 54 constitutes a weighing means, and the bag opening metal fitting 56 constitutes a bag opening member, and both end portions 561 of the bag opening metal fitting 56. Constitutes the internal force imparting section. In correspondence with claim 7, the inner cylinder 42 of the nozzles 42, 52
Reference numerals 0 and 520 form a tube, and wires 424 and 524 form an adhesion preventing member.

[0044]

As described above, according to the invention of claim 1, a series of operations from the operation of opening the bag to the sealing of the bag through the quantitative filling of the powder and the sealing of the bag are continuously performed.
Work efficiency can be improved by saving labor.
After filling the bag with less than the target filling amount by the rough filling means, the fine filling means measures the powder filling amount while filling the powder, so that the filling amount is measured from the beginning of the filling operation. When compared with the conventional device for filling, the time required for filling can be shortened and the weighing accuracy can be maintained high.
By performing the filling by the rough filling means and the filling by the fine filling means in parallel, the work efficiency can be further enhanced. According to the second aspect of the present invention, since the bag is transferred in a self-supporting state on the guide rail, it is possible to reliably transfer the bag to the end of the device while preventing the bag from falling due to deformation. Claim 3
In the invention, the powder of a constant volume is reliably collected in the concave portion of the collection volume only by driving the collection volume. According to the invention of claim 4, the nozzle can be surely inserted into the bag to minimize the scattering of the powder. According to the invention of claim 5, it is possible to precisely adjust the filling amount of the powder while preventing the scattering of the powder and the clogging of the nozzle for supplying the powder. In the invention of claim 6, the contact between the powder supply nozzle and the bag can be prevented by the minimum necessary bag opening member. According to the invention of claim 7, it is possible to secure a large opening area on the powder feeding side of the tubular body to prevent a decrease in the amount of guiding the powder, and to eliminate restrictions on the layout of the powder supply path to the tubular body.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a powder quantitative filling device according to an embodiment of the present invention.

FIG. 2 is a diagram showing the device of FIG. 1 in the direction of arrow II in FIG.

3 is a diagram showing the device of FIG. 1 in the direction of arrow III in FIG.

FIG. 4 is a perspective view showing the transfer device of FIG. 3 with only a bag W omitted.

5 is a perspective view showing details of the transfer device of FIG. 4 at a bag stop position.

6A and 6B are views for explaining the action and effect of the stopper cylinder 15 of FIG.

7] Blocks 10a to 1 of the guide rail 10 of FIG.
The perspective view which shows the taper part 104 provided in 0e.

8 is a bag receiving position L1 of the guide rail 10 of FIG.
3 is a perspective view from a stop position to a stop position L2. FIG.

9 is a view showing the expansion molding device 2 of FIG. 8 in the direction of arrow IX in FIG.

10 is a view showing the expansion molding apparatus 2 of FIG. 9 from the direction of arrow X in FIG.

11 is a perspective view showing the expansion molding device 2 of FIG. 10 in the direction of arrow XI in FIG.

12 is an exploded perspective view of a main part of the coarse weighing device 4 of FIG.

13 is a cross-sectional view of the coarse weighing device 4 of FIG.

FIG. 14 is a view showing a modified example of the rough weighing device 4 of FIG.

FIG. 15 is a view showing the action of the wire 424 of FIG.

16 shows the nozzle shutter 43 of FIG. 13 as indicated by an arrow XV in FIG.
The figure shown from the I direction.

FIG. 17 is a diagram for explaining the operation of the nozzle shutter 43 of FIG.

18 is a sectional view of the precise weighing device 5 of FIG.

19 is a perspective view of the lower portion of the precise weighing device 5 of FIG.

20 is a view for explaining the operation of the bag opening fitting 56 of the precise weighing device 5 of FIG.

21 is a sectional view taken along line XXI-XXI of FIG. 20.

22 is a perspective view of the tapping device 6 of FIG.

23 is a perspective view of the sealing device 7 of FIG. 1. FIG.

FIG. 24 is a view showing a conventional example of a powder quantitative supply device.

[Explanation of symbols]

 1 Transfer Device 2 Spreading Device 3 Hopper 4 Coarse Weighing Device 5 Precision Weighing Device 6 Tapping Device 7 Sealing Device 10 Guide Rail 14 Chain 23 Mold Pushing Member 40 Bulking 42, 52 Nozzle 43 Nozzle Shutter 54 Electronic Balance 56 Bag Opening Metal Fitting

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Sugio Tsukada 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto City Stock company Shimadzu Sanjo factory

Claims (7)

[Claims] 1. A transfer means for transferring a bag for storing powder in a state in which its opening faces upward, an expanding means for expanding a bag transferred by the transfer means in a folded state, and a powder. Rough filling means for bulking the powder having a volume smaller than the specified filling amount from the hopper storing it and filling the bag expanded by the expanding means, and weighing the powder filled in the bag. While precisely filling means for supplying the powder from the hopper to the bag until the powder in the bag reaches a specified filling amount,
A quantitative filling device for powder, comprising: a sealing means for sealing the bag filled with the powder having a prescribed filling amount. 2. A bag carrying device for carrying a bag in a state where its opening faces upward, and a guide rail having a carrying surface having a cross-sectional shape along the bottom shape of the bag when the bag is opened, The expansion forming means is provided so that it can be inserted into and removed from the bag, and when the bag is expanded, the expansion forming means presses the bottom of the bag against the conveying surface of the guide rail and the expansion forming means. A transporting means for transporting the opened bag along the guide rail in a state of being self-supporting on the transport surface of the guide rail. 3. A powder collecting device for collecting a fixed amount of powder from a powder dropping port of a hopper containing the powder,
A bulking member having a recess for accommodating the powder, and the bulking member so that the opening end of the recess is slidably in contact with the powder drop opening of the hopper while being in contact with the powder drop opening. A bulking device for powder, comprising a bulking member driving means for driving a member. 4. A powder filling device for filling a bag with a fixed amount of powder, wherein a fixed amount of powder is placed inside the bag so that the bag can be inserted into and removed from the bag. And a lower end opening of the nozzle when the nozzle is removed from the bag, and the lower end opening of the nozzle is opened when the nozzle is inserted into the bag and the opening of the bag. And a nozzle opening / closing member that abuts on the inner peripheral side of the portion and widens the opening. 5. A powder supply nozzle provided to be able to be inserted into and removed from a bag for storing powder, a weighing means for weighing the amount of powder filled in the bag, and the nozzle for the bag. A bag opening member that abuts on the inner peripheral side of the opening of the bag when the bag is opened to expand the opening larger than the nozzle diameter, and the bag opening member is a weight detection range by the weighing means. A powder filling device characterized by being installed inside. 6. The powder filling device according to claim 5, wherein a pair of the bag opening members are provided so as to sandwich the center line of the nozzle, and the pair of bag opening members are inserted into the bag. At this time, the powder is characterized in that an internal force imparting portion for generating an internal force is formed to sufficiently open the bag until the portion of the opening of the bag that does not come into contact with each bag opening member is expanded to the outer peripheral side of the bag. Filling device. 7. A powder guide device having a tube body for guiding powder, wherein a wire-shaped adhesion preventing member is arranged inside the tube body along an inner wall of the tube body. A powder guiding device, wherein the tube body is provided rotatably around its axis.