JPH0634247Y2 - Filling equipment for powder filling and packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention This invention is configured to convey and fill powdery material into a tubular bag by rotating an auger arranged inside a bag-making cylinder. The present invention relates to a filling device for a bag-filling and packaging machine for powder-like materials, which reliably prevents the discharge of powder-like materials when the auger is stopped to perform quantitative filling with high accuracy and enables high-speed filling. is there.

Prior art is formed into a tubular shape by a bag making device arranged in a bag making cylindrical body,
A packaging material such as a film to be fed vertically downward is subjected to a vertical seal on the overlapping surface of the longitudinal edge portion thereof, and various powdered substances are put into the obtained cylindrical bag body through the cylindrical body. A vertical bag-making filling and packaging machine that continuously manufactures a vertical pillow package by performing horizontal sealing and cutting before and after sandwiching the powdery material to be filled in the tubular bag, respectively, is widely known. .

In the above-described bag-making filling and packaging machine for powdery materials, a hopper is disposed above the bag-making cylinder, and an auger whose axis is vertically aligned is rotatably pivoted inside the cylinder. It is supported. This auger is provided with a spiral feed blade having an outer diameter smaller than the inner diameter of the cylindrical body. Then, by rotating this auger in a required direction, the powdery material stored in the hopper is pressure-fed downward along the cylindrical body, and is filled into the cylindrical bag body from the lower end opening of the cylindrical body.

By the way, in the case of powder that does not have good powder breakage, an indeterminate amount of powder falls from the opening of the bag-making cylinder even after stopping the rotation of the auger, which causes the tubular bag to It is pointed out that there is a problem that the contents of the body vary. In addition, the powdery substance drops irregularly, so that the powdery substance adheres to the sealing portion of the tubular bag body and is caught during lateral sealing, resulting in incomplete sealing. There was also. As a proposal for dealing with these problems, a device “a discharge port structure in a bag-making filling and packaging apparatus for powdery materials” according to Japanese Utility Model Publication No. 63-13124
Exists. In this device, a cap having a tapered inner peripheral surface is provided at the lower end of a bag-making cylinder so that the discharge port is narrowed, and a lid member capable of closing the discharge port is provided at the periphery of the cap. It is provided. Then, after driving the auger disposed inside the bag-making cylinder to fill the bag with a predetermined amount of powdery material, the auger is stopped and at the same time, the discharge port is closed by the lid member. . As a result, it is possible to prevent the powdery material from dropping irregularly from the discharge port, to make the inner volume of the bag uniform, and to completely perform the lateral sealing.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the bag-making filling and packaging apparatus according to the above-mentioned configuration, since the inner surface of the mouthpiece is formed in a taper shape, the powder material sent by the auger is compressed by the mouthpiece part. Therefore, there is a problem in that the discharge from the discharge port formed at the bottom of the mouthpiece cannot be performed smoothly. Moreover, since the discharge resistance at the discharge port increases, it is not possible to discharge at high speed, which not only leads to a decrease in manufacturing capacity, but it is also pointed out that powder may stick to the auger surface due to discharge resistance depending on the properties of the powder. It

In addition, due to the small opening area of the discharge port, the discharge port is clogged with powdery substances, an excessive load is applied to the auger, and the life of parts is shortened, which causes a serious problem. be pointed out. Furthermore, the space necessary to open and close the lid member must be secured at the upper part of the tubular bag, and for this reason, the amount of powdery substance that can be filled per package of the tubular bag. There is also a drawback that

Here, when the lower end of the auger is arranged close to the discharge port, the discharge amount of the powdery material can be accurately calculated from the pitch and the rotation speed of the feed blade in the auger. However, when the lower end of the auger and the discharge port are separated from each other, as in the above-mentioned device, the dust and
The discharge amount increased or decreased depending on the sparse state, and it was not possible to perform quantitative filling with high accuracy.

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the powdery material filling and packaging machine described above, and has been proposed to suitably solve this problem. It is an object of the present invention to provide a filling device capable of performing a smooth discharge at high speed.

Means for Solving the Problems In order to overcome the above problems and achieve the intended purpose, the present invention hangs a bag body from a bag-making cylinder, and rotates an auger inserted in the cylinder. In a powder filling and packaging machine for filling powder into the bag, the bag is arranged coaxially inside the bag making cylinder, and a discharge port is required in the circumferential direction over the bottom surface and side surface of the lower end portion. A plurality of inner cylinders bored at an angle, and the inner cylinder is rotatably disposed inside the bag-making cylindrical body so as to surround the inner cylinder, and is urged by an appropriate drive means to form an inner cylinder. In addition to rotating with respect to the bottom surface and side surface of the lower end portion, an outer cylinder having a plurality of discharge openings formed in the circumferential direction at a required angle is formed. It is characterized in that the powdery substance in the inner cylinder is discharged by matching the discharge port of the inner cylinder.

Embodiments Next, a filling device of a powder filling and packaging machine according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments.

As shown in FIG. 1, a machine frame (not shown) of the bag-making filling and packaging machine.
A bag-making cylinder 12 is suspended and fixed to the lower surface of a horizontal base 10 arranged at an appropriate position, and a former (bag-manufacturing device) 14 is arranged in the cylinder 12. Then, the packaging material supplied from a supply source (not shown) is formed into a tubular bag body 16 in the former 14, and then intermittently transferred downward by a predetermined length along the surface of the cylindrical body 12. In addition, tubular bag
A feeding means such as a roller or a belt is arranged outside the cylindrical body 12 with the 16 interposed, and the tubular bag body 16 is intermittently transferred by the feeding means.

A center seal device (not shown) is provided on the outside of the bag-making cylinder 12 for vertically sealing both end portions of the tubular bag 16 overlapping in the vertical direction. Further, below the cylindrical body 12, an end seal device 18 that moves close to and away from each other in a direction orthogonal to the transfer direction of the tubular bag body 16 is arranged, and the tubular bag is vertically sealed by the sealing device 18. Horizontal seal on body 16
Cutting is performed.

A support (not shown) is erected on the upper part of the base 10, and a support member 20 horizontally extended from the support stores a powdery material at a position facing above the bag-making cylinder 12. Hopper 22
Is provided. In the lower end opening 22a of this hopper 22,
A connecting member 24 having a through hole 24a having a required shape is communicatively connected, and the bag forming cylinder 1 is placed in the through hole 24a of the communicating member 24.
The upper end of a cylindrical inner cylinder 26 coaxially installed in 2 is disposed and fixed. Further, the hopper 22, the connecting member 24 and the inner cylinder 26
The inside of the auger 28 has its axis aligned vertically with the inner cylinder.
Is rotatably supported by a bearing (not shown) disposed above the hopper 22. This auger 28 has an inner cylinder
A feed blade 28a having an outer diameter smaller than the inner diameter of 26 is formed in a spiral shape, and the lower end portion of the auger is arranged so as to be close to the bottom surface of the inner cylinder 26. Therefore, when the auger 28 is rotated by an appropriate driving means, the powdery material stored in the hopper 22 is pressure-fed downward along the inner cylinder 26.

The inner cylinder 26 is formed in a cylindrical shape having a closed lower end, and the lower end thereof projects from the lower end of the bag-making cylinder 12 by a predetermined length (FIGS. 2 and 3). reference). At the lower end of the inner cylinder 26, as shown in FIG.
A plurality of discharge ports 26a (four in the embodiment) are formed at a predetermined angle in the circumferential direction across the bottom surface and the side surfaces. The portion 26b in which the ejection port 26a is not formed functions as a shielding unit that closes the ejection port 46a of the rotary shutter 42 described later.

In the connecting member 24, an upper end portion of a cylindrical outer cylinder 30 coaxially arranged between the bag-making cylindrical body 12 and the inner cylinder 26 is an inner cylinder.
26 and the connecting member 24 are rotatably arranged. That is, the inner cylinder 26 and the outer cylinder 30 arranged on the connecting member 24 are rotatably arranged via the bearing 32, and the outer cylinder 30 is rotatable on the connecting member 24 via the bearing 34 and is not detachable. It is arranged in such a state. In addition, as shown in FIG.
A bracket 36 protruding outward in the radial direction is fixed. Then, at the appropriate position of the bracket 36, the base
A connecting body 37 arranged at the tip of a piston rod 38a in a cylinder 38 installed in 10 is pivotally attached via a pin 39. Therefore, by urging the cylinder 38 in the forward and reverse directions, the outer cylinder 30 rotates with respect to the inner cylinder 26 within a required angle range.

As shown in FIGS. 3 and 4, a small diameter portion 30a having a smaller outer diameter is formed at the lower end portion of the outer cylinder 30, and the outer circumference located a predetermined length above the lower end portion of the small diameter portion 30a. A male screw portion 30b is formed on the. Further, holes 30c, 30c intersecting the axis of the outer cylinder 30 are provided between the male screw portion 30b and the lower end of the small diameter portion 30a, and the rotary shutter 42 is provided in the outer cylinder 30 in the hole 30c. A pin 40, which functions as a detent during installation, is inserted.

The rotary shutter 42 is a small diameter portion formed on the outer cylinder 30.
Cylindrical mounting part 44 with an inside diameter that can be fitted to 30a
And a discharge portion formed to project at one axial end of the mounting portion 44.
It consists of 46 and. Mounting part on the rotary shutter 42
A male screw portion 44a is formed on the outer periphery of the open end of 44, and notches 44b, 44b extending in the axial direction are formed at positions corresponding to the positions of the holes 30c, 30c of the small diameter portion 30a in the male screw portion 44a. Has been done. That is, the rotary shutter 42 is fitted to the pins 40, 40 protruding from the small-diameter portion 30a with the notches 44b, 44b aligned and matched, and the outer cylinder 30 and the rotary shutter 42 rotate integrally. It is configured to do. Furthermore, both members 3
0 and 42 are sleeves 48 in which an internal thread portion 48a is formed on the inner peripheral surface.
Are fixed to the male screw portions 30b and 44a by screwing them in common. As shown in Fig. 3, the rotary shutter
A bearing 50 is disposed inside the mounting portion 44 of the 42, and the rotary shutter 42 is configured to be rotatable with respect to the inner cylinder 26 via the bearing 50.

Here, as a procedure for attaching the rotary shutter 42 to the outer cylinder 30, first, the sleeve 48 is screwed into the male screw portion 30b of the outer cylinder 30, and the pins 40, 40 are fitted into the holes 30c, 30c. Then, the cutouts 44b, 44b of the rotary shutter 42 are aligned with the pins 40, 40, and the rotary shutter 42 is fixed to the small diameter portion 30a of the outer cylinder 30.
Exterior. Next, if the sleeve 48 is screwed into the male screw portion 44a of the rotary shutter 42, the rotary shutter 42 moves in the outer cylinder direction as a result of the rotation being restricted by the pin 40, and the open end thereof is the male screw portion of the outer cylinder 30. It is positioned and fixed by abutting on the stepped portion of 30b and the small diameter portion 30a.

The discharge portion 46 of the rotary shutter 42 has an inner diameter slightly larger than the outer diameter dimension of the inner cylinder 26, and is formed in a cylindrical shape in which an end portion separated from the mounting portion 44 is closed. And
As shown in FIG. 4, the discharge part 46 has a discharge port 46a extending from the closed bottom face to the side face at a position corresponding to the shield part 26b formed on the inner cylinder 26. The opening size of the discharge port 46a is set to be the same as or slightly smaller than the size of the shield portion 26b of the inner cylinder 26. Further, the shield portion 46b of the discharge portion 46, in which the discharge port 46a is not formed, is set to a size capable of completely closing the discharge port 26a of the inner cylinder 26.

Therefore, if the outer cylinder 30 is rotated to align the discharge port 46a of the rotary shutter 42 with the discharge port 26a of the inner cylinder 26 as shown in FIG. It is possible to discharge the powdered material that has been formed. Further, as shown in FIG. 7B, the discharge port 46a of the rotary shutter 42 is connected to the shield portion 2 of the inner cylinder 26.
If it coincides with 6b, the shielding portion 46b of the rotary shutter 42 coincides with the discharge port 26a of the inner cylinder 26, and thus the discharge ports 26a and 46a are both closed, so that the powdery substance from the inner cylinder 26 is blocked. The discharge is reliably blocked.

(Regarding Modifications) FIGS. 8 to 10 show modifications of the rotary shutter 42 and the inner cylinder 26 employed in the filling device according to the present invention. That is, the rotary shutter 42 shown in FIG. 8 is formed in a so-called inverted frusto-conical shape in which the discharge portion 46 has a smaller diameter as it goes downward, and the discharge port 46a extending to the bottom surface and the side surface of the discharge portion 46 has a circumference. A plurality of holes are bored at a required angle in the direction. Also, the lower end of the inner cylinder 26 is
Like the discharge portion 46, the discharge portion 26a is formed in the shape of an inverted truncated cone, and a plurality of discharge ports 26a extending through the bottom surface and the side surfaces are formed in the circumferential direction at a required angle. And, the lower end of this inner cylinder 26 is
The rotary shutter 42 is internally mounted inside the emitting portion 46 with a slight gap.

In this case, the feed blade 28a of the auger 28 disposed in the inner cylinder 26 is set so that the outer diameter becomes smaller as the inner diameter of the inner cylinder 26 changes, and the lower end of the auger 28 is Inner cylinder
It is configured to be close to the bottom surface of 26.

Next, the rotary shutter 42 shown in FIG.
The lower end portion of is formed in a hemispherical shape, and the discharge portion 46 is provided with a plurality of discharge ports 46a at a predetermined angle in the circumferential direction. Further, the lower end portion of the inner cylinder 26 is also formed in a hemispherical shape like the discharge portion 46 of the rotary shutter 42, and a plurality of discharge ports 26a are formed in the circumferential direction at a required angle. Further, in the rotary shutter 42 shown in FIG. 10, the emission portion 46 is formed so as to have a smaller diameter as it goes downward, and the outer peripheral surface is formed in a curved surface shape that is convex inward in the radial direction. A plurality of discharge ports 46a are formed on the bottom surface and the outer surface of the discharge part 46.
Are drilled at a required angle in the circumferential direction. Also, the inner cylinder 26
The lower end portion of the rotary shutter 42 is formed to have a smaller diameter as it goes downward similarly to the discharge portion 46 of the rotary shutter 42, and the outer peripheral surface is formed to have a curved surface shape that is convex inward in the radial direction. A plurality of discharge ports 46a extending from the bottom surface to the side surfaces are formed in the lower end portion in the circumferential direction at a required angle. In the embodiment shown in FIG. 10, the outer peripheral surface of the discharging portion 46 of the rotary shutter 42 and the outer peripheral surface of the lower end portion of the inner cylinder 26 are convex outward in the radial direction opposite to the shapes shown in the drawings, respectively. The curved surface may have the following shape.

Also in the modified example shown in FIGS. 9 and 10, the feed blade 28a of the auger 28 disposed in the inner cylinder 26 changes in outer diameter dimension as the inner diameter dimension of the inner cylinder 26 changes. , Auger 28
The lower end of the inner cylinder is configured to be close to the bottom surface of the inner cylinder.

According to the above modified example, the inner cylinder 26 and the rotary shutter 42 are
The powdery substance discharged from the discharge ports 26a, 46a of the above will fall radially, and the efficiency of filling the bag body 16 at the time of discharging the powdery substance can be further enhanced.

Operation of Embodiment Next, the operation of the filling device according to the embodiment having the above-described configuration will be described.

At the time of starting the bag-making filling and packaging machine, the discharge port 26a of the inner cylinder 26 and the discharge port 46a of the rotary shutter 42 are closed by shielding portions 26b and 46b, respectively, as shown in FIG. The powdery substance stored in 26 does not fall. When the packaging machine is started in this state, the packaging material delivered from the supply source (not shown) is formed into a tubular shape by the former 14 and hangs down from the lower end of the bag body cylindrical body 12, and the longitudinal edge portion A vertical seal is applied to the overlapping surface and a horizontal seal is applied at a predetermined position. Next, when the cylinder 38 is urged and its piston rod 38a is drawn into the cylinder tube (the state shown by the solid line in FIG. 6), the piston rod 38a
The bracket 36 connected to the connecting body 37 at the tip of the 38a
With it, it rotates counterclockwise. As a result, as shown in FIG. 7B, the discharge port 26a of the inner cylinder 26 and the discharge port 46a of the rotary shutter 42 are aligned with each other. And the auger 28
When is rotated a required number of times, the cylindrical bag body 16 is filled with the powdery material in an amount corresponding to the number of rotations through the discharge ports 26a and 46a.

Here, the discharge ports 26a, 46 of the inner cylinder 26 and the rotary shutter 42 are
Since a is formed from the bottom surface to the side surface of both members, the powdery substance is discharged smoothly, and the powdery substance is discharged from the discharge ports 26a, 46a.
It is possible to prevent the auger 28 from being overloaded due to clogging. Further, since the lid member and the like do not protrude from the lower end portion of the rotary shutter 42, it is possible to increase the amount of powdery material that can be filled per one tubular bag body.

Next, when the cylindrical bag body 16 is filled with a predetermined amount of powdery material, the cylinder 38 is reversely biased, and the outer cylinder 30 is rotated clockwise by a required angle. As a result, the rotary shutter 42 disposed at the lower end of the outer cylinder 30 rotates, and as shown in FIG.
The discharge port 26a of the inner cylinder 26 is blocked by the shielding portion 46b of the rotary shutter 42, and the discharge port 46a of the rotary shutter 42 is closed by the inner cylinder 2
It is blocked by the shield portion 26b of 6. Therefore, the irregular falling of the powdery substance from the inner cylinder 26 is completely prevented, and the fixed amount can be always filled. Then, the cylindrical bag body 6 filled with a predetermined amount of powder is intermittently transferred, and laterally sealed and cut by the end seal device 18, so that a final packaged product filled with powder is obtained. .

Effects of the Invention As described above, according to the filling device of the powdery material filling and packaging machine of the present invention, the powdery material can be collected by simply rotating the outer cylinder that is mounted on the inner cylinder in which the powdery material is stored. It is possible to surely stop the discharge and the discharge of the powdery material. Therefore, the powdery material can be quantitatively filled in the tubular bag with high accuracy. In addition, since the discharge ports of the inner cylinder and the outer cylinder are sufficiently large opened over the bottom surface and the side surfaces, the powdery material can be discharged smoothly without being compressed or clogged. Discharge can be achieved and manufacturing efficiency can be improved. In addition, since it is possible to prevent the powdery substance from clogging the discharge port, it is possible to prevent an accident that the auger is damaged without causing an excessive load on the auger.

[Brief description of drawings]

FIG. 1 is a front view of a bag-making and filling and packaging machine for powdery materials, which employs a filling apparatus according to a preferred embodiment of the present invention, and FIG. 2 is a bag-making and packaging machine for powdery materials shown in FIG. Fig. 3 is a vertical cross-sectional view showing an enlarged main part of the filling device, Fig. 4 is an exploded perspective view showing the main part of the filling device shown in Fig. 3, and Fig. 5 is an internal view. FIG. 7 is a bottom view of the discharge port of the cylinder observed from the direction of the line VV in FIG. 1 in a state where the discharge part of the cylinder is closed by the shielding part of the rotary shutter, FIG. 6 is a plan view showing the drive mechanism of the outer cylinder, and FIG. Is a schematic perspective view showing a state in which the discharge port of the inner cylinder is closed, FIG. 7 (b)
Is a schematic perspective view showing a state in which the discharge port of the inner cylinder is opened,
FIG. 9, FIG. 9 and FIG. 10 are exploded perspective views showing modified examples of the inner cylinder and the rotary shutter, respectively. 12 ... Cylindrical body for bag making, 16 ... Cylindrical bag body 26 ... Inner cylinder, 26a ... Discharge port 28 ... Auger, 30 ... Outer cylinder 38 ... Cylinder, 46a ... Discharge port

Claims (6)

[Scope of utility model registration request] 1. A bag body (16) is hung from a bag-making cylinder body (12), and an auger (28) inserted in the cylinder body (12) is rotated to powder the bag body (16). In a powder material filling and packaging machine for filling and supplying a powdery material, it is coaxially arranged inside the bag making cylindrical body (12), and a discharge port (26a) is circumferentially formed across the bottom surface and side surface of the lower end portion. A plurality of inner cylinders (26) perforated at a required angle, and the inner cylinder (26) is rotatably disposed inside the bag-making cylindrical body (12) so as to surround the inner cylinder (26). The outer cylinder is urged by the drive means (38) to rotate with respect to the inner cylinder (26), and a plurality of discharge ports (46a) are bored at a predetermined angle in the circumferential direction over the bottom surface and the side surface of the lower end ( 30) and by rotating the outer cylinder (30) so that the discharge port (46a) of the outer cylinder (30) is aligned with the discharge port (26a) of the inner cylinder (26). (26) Powder in Filling apparatus of the granulate filling packaging machine, characterized by being configured to eject an object. 2. The inner cylinder (2) is attached to the lower end of the outer cylinder (30).
A rotary shutter (42) that surrounds the portion of 6) where the discharge port (26a) is drilled from below is rotatably provided integrally with the outer cylinder (30), and is provided at the lower end of the rotary shutter (42). The filling device for a powdery material filling and packaging machine according to claim 1, wherein a plurality of discharge ports (46a) extending over the bottom surface and the side surfaces are provided at a predetermined angle in the circumferential direction. 3. The lower end of the rotary shutter (42) is formed in a cylindrical shape, and the lower end of the inner cylinder (26) is formed in a cylindrical shape following the shape of the lower end of the rotary shutter (42). Item 2. A filling device for a powder filling and packaging machine according to Item 2. 4. The rotating shutter (42) has a lower end portion formed into an inverted truncated cone shape, and the lower end portion of the inner cylinder (26) follows the lower end portion shape of the rotating shutter (42). The filling device for a powdery material filling and packaging machine according to claim 2, wherein the filling device is formed. 5. The rotating shutter (42) has a lower end portion formed in a hemispherical shape, and the lower end portion of the inner cylinder (26) is formed in a hemispherical shape following the shape of the lower end portion of the rotating shutter (42). Item 2. A filling device for a powder filling and packaging machine according to Item 2. 6. The rotary shutter (42) has a lower end portion having a smaller diameter toward the lower side and an outer peripheral surface formed in a curved shape, and the lower end portion of the inner cylinder (26) is fixed to the rotary shutter (42). The filling device for a powdery material filling and packaging machine according to claim 2, wherein the diameter becomes smaller as it goes downward so as to follow the shape of the lower end portion of the, and the outer peripheral surface is formed into a curved shape.