JP5570059B2 - Device for quantitative supply of powder in packaging machines - Google Patents

Description

  The present invention relates to an apparatus for measuring and supplying powder, particularly powder with fine particles such as powdered tea and cocoa.

  As an example of a filling material attached to an automatic packaging machine, the auger type feeding device described in Patent Document 1 is an example of a material suitable for a case where the filling material is a fine particle powder such as powdered tea. Are known. Such powdered tea has inferior fluidity. For example, if it is of a measuring bowl type, a part of the powdered tea remains on the inner surface of the bowl when it is cut off. It was adopted as an alternative because of the disagreement that caused the phenomenon to vary.

  This auger-type filling material supply device is provided with a hopper for storing powdered tea as a filling material, and an auger screw is inserted freely through an outlet pipe provided downward at the bottom of the hopper so as to rotate about a vertical axis. In addition, a damming tool in which a plurality of window holes called chrysanthemum are divided and opened is fitted to the lower end of the outlet pipe, and when the auger screw is rotated by a predetermined amount, After being pushed out from each window hole of the damming tool while being slightly compressed, and the rotation of the auger screw is stopped, the window hole of the damming tool is closed by utilizing the poor fluidity of powdered tea, Further spilling of powdered tea is prevented, which is intended to supply a certain amount of powdered tea in a single bag.

JP 2003-237701 A

As described above, the auger-type filling and feeding device can be said to be more effective for quantitative supply than the measuring bowl type, but it is in a state of extremely poor fluidity due to the conditions such as the material of powdered tea and the surrounding atmosphere. For example, when the rotation of the auger screw stops, the powdered tea may not only block the damming device but also remain hung from the icicle. Then, the supply amount of powdered tea at this time will be less than the stipulated amount remaining as icicles. Conversely, the next time, even if it is properly extruded, the remaining amount of icicles will be added to the specified amount. If you subtract, the supply amount may vary greatly. In particular, when the supply amount of powdered tea to be filled in one bag is small, if the supply amount varies greatly as described above, the quality of the tea produced by melting one bag There is a risk of change, and further improvement has been desired.
The present invention has been completed based on the above circumstances, and an object of the present invention is to ensure that a certain amount of powder as a filling can be supplied.

The quantitative powder supply apparatus in the packaging machine of the present invention includes a hopper for storing powder, an outlet pipe provided downward from the bottom of the hopper, and a rotary drive around the vertical axis provided facing the outlet pipe. A damming tool having a possible auger screw, a filling chute disposed below the outlet pipe and having a lower end facing the packaging bag, and an opening provided at the lower end of the outlet pipe and capable of extruding while compressing powder And a cutting member that is driven to advance and retreat along the lower surface of the damming device and cuts the powder suspended from the lower surface of the damming device , and the damming device includes the outlet pipe of the hopper The bottom of the damming tool has a tapered through-hole that is gradually reduced in diameter toward the lower surface, and the cutting The member is a pair of cutting There has a feature where the formed provided to be moved in the direction butted to each other.

  According to the above configuration, when the auger screw is driven to rotate by a predetermined amount, the powder is pushed out while being compressed from the opening of the damming tool, and after the rotation of the auger screw is stopped, the powder is pushed by the powder. The opening is closed. At the same time, the cutting member advances along the lower surface of the damming tool, and when there is powder hanging from the lower surface of the damming tool, it is cut and spontaneously falls. That is, in each supply operation, as the auger screw rotates, a certain amount of powder is pushed out from the lower surface of the damming tool. A constant amount of powder can always be supplied.

Furthermore, powder may dam is extruded while being gradually compressed through a stop of the through-holes, since extruded while being closer to the center of no damming device that scattered in the circumferential direction, the lower outlet tube of the hopper The whole amount is surely dropped and supplied toward the chute. Moreover, since it is compressed in a single through-hole, the density can be made constant, so that a certain amount of powder can be supplied more reliably.

Furthermore, the powder that hangs down from the lower surface of the opening is cut by advancing so that the pair of cutting blades abut each other. Since the powder remaining after hanging falls from the center of the opening, the diameter of the chute that receives the powder can be minimized.

  According to the present invention, it is possible to reliably supply a fixed amount of powder as a filling.

Partially cutaway side view of one embodiment of the present invention Cross section of damming tool Plan view Partial side sectional view of the supply device showing the supply operation of powdered tea The figure showing the cutting state of the remaining powdered tea Partial sectional view from the front of the feeder Plan view showing the open state of the cutting device Plan view showing the closed state of the cutting device

<Embodiment>
An embodiment of the present invention will be described with reference to FIGS. In this embodiment, powder tea X, which is a fine powder, is exemplified as the filling, and the powder tea X is filled in a fixed amount into a stick-type packaging bag manufactured in a vertical multi-row filling and packaging machine. It has come to be.

  An outline of the manufacturing process of the packaging bag will be described with reference to FIG. The raw wrapping film fed out from the film roll is cut into a plurality of rows by a predetermined width by a slitter, and each cut wrapping film f is turned into a cylindrical shape through a former 50 and then in a vertical sealing device. A cylindrical body is formed by applying a vertical seal to the ends overlapped in a palm shape. Subsequently, after a horizontal seal is applied to a predetermined position of the cylindrical body by a horizontal seal device, the powdered tea X stored in the hopper 11 is filled through the filling chute 18 and half-filled as will be described in detail later. A packaging bag is formed. The semi-wrapping bags are sent out one cycle at a time, and further sealed horizontally to form stick-shaped packaging bags closed at both ends. Packaging bags are manufactured.

  Next, the quantitative supply device 10 for the powdered tea X that is the filling will be described in detail. The device 10 is an auger type supply device and includes a hopper 11 for storing powdered tea X. The hopper 11 has a hopper body 12 having a wide upper portion, and a receiving portion 13 is continuously provided at the lower end of the squeezed portion. The bottom surface of the receiving portion 13 has a mortar shape. The storage chamber 15 is formed side by side so as to correspond to each row for manufacturing the packaging bag described above. A cylindrical outlet pipe 16 protrudes downward from the center of the bottom surface of each storage chamber 15. Each outlet pipe 16 is arranged concentrically above each row of filling chutes 18.

In the receiving portion 13 of the hopper 11, an auger screw 20 is disposed vertically for each storage chamber 15. The auger screw 20 has a structure in which a screw portion 22 is continuously provided on the lower side of a shaft portion 21, and the screw portion 22 is arranged around an axis line from a position above a predetermined dimension of the storage chamber 15 toward the lower end of the outlet pipe 16. While being rotatably inserted, the upper end of the shaft portion 21 is drivingly connected to an output shaft 26 </ b> A of a motor 26 installed on the base frame 25 via a gear mechanism 27.
When the motor 26 is driven, each auger screw 20 rotates around its axis (alternately in the opposite direction in each row), and the powdered tea X is drawn between the spiral blades 23 of the screw portion 22 while inside the outlet pipe 16. Will be sent out.

A damming tool 30 is attached to the lower end of the outlet pipe 16. Therefore, a male screw 17 is cut on the outer periphery of the lower end of the outlet pipe 16 (see FIG. 4). As shown in FIGS. 2 and 3, the damming tool 30 has a circular cap shape having a thick bottom portion 32, and the inner surface of the peripheral wall 31 can be screwed into the male screw 17 of the outlet pipe 16. The female thread 34 is cut. The bottom portion 32 of the damming device 30 has a shape in which a protruding portion 33 is formed at the center portion of the outer bottom surface. The bottom portion 32 penetrates from the center of the inner bottom surface to the center of the outer bottom surface of the protruding portion 33. A hole 35 is formed. As shown in FIG. 4, the shape of the through-hole 35 has a taper shape in which the upper end has a diameter slightly larger than the inner diameter of the outlet pipe 16 described above and is gradually reduced toward the lower end. The thickness portion (thickness portion of the protruding portion 33) is a straight portion 37 having the same diameter as the small diameter portion at the lower end of the tapered portion 36.
The damming tool 30 having the above-described structure is fixed in a state in which the internal thread 34 of the inner periphery of the peripheral wall 31 is screwed into the external thread 17 of the outlet pipe 16 and the internal stepped portion 38 is in contact with the lower end surface of the outlet pipe 16. Has been.

A cutting device 40 is provided between the damming tool 30 attached to the lower end of the outlet pipe 16 and the upper end of the filling chute 18 to cut the powdered tea X hanging from the damming tool 30. Yes.
As shown in FIGS. 4 to 8, the cutting device 40 uses a parallel open / close air chuck 41, and a pair of cutting blades 45 abuts against a pair of claw portions 42 that open and close in a parallel posture. It is installed in this way. The cutting blade 45 is formed in a front L-shape as a whole, and the wide front side region in the horizontal portion becomes an opening / closing plate 46, and the lower surface side is cut off at the abutting end of both opening / closing plates 46. As a result, a tapered blade portion 47 is formed, and a mounting plate 48 is bent downward from the outer edge of the narrower rear region in the horizontal portion. Each cutting blade 45 is fixed in such a manner that the opening and closing plates 46 face each other, and each mounting plate 48 straddles each claw portion 42 of the air chuck 41 and is tightened to the outer surface side with bolts 49. As a result, the opening / closing plate 46 facing the pair of cutting blades 45 opens and closes in a region on the near side of the claw portion 42 of the air chuck 41.

The cutting device 40 having the above structure is arranged such that the opening / closing plate 46 of the pair of cutting blades 45 sandwiches the longitudinal axis of the outlet pipe 16 and the filling chute 18 from the front and back, and the upper surface of the opening / closing plate 46 is The damming tool 30 is disposed along the lower surface of the projecting portion 33 on the bottom surface (strictly opening a predetermined clearance) so as to be able to advance and retreat.
When the air chuck 41 is in the open state and the pair of cutting blades 45 are open, as shown in FIG. 7, the blade portions 47 of the both opening and closing plates 46 are separated from each other, and the through holes 35 (etc. When the diameter portion 37) is fully opened and the pair of cutting blades 45 are closed in accordance with the closing operation of the air chuck 41, the blade portions 47 of the both opening and closing plates 46 are inserted into the through holes 35 (equal diameter portions) as shown in FIG. 37), the equal diameter portion 37 is closed at the center position.

Next, the operation of this embodiment will be described.
When the filling timing of powdered tea X, which is a filling material, is reached in the manufacturing process of the packaging bag, the auger screw 20 is rotated by a predetermined amount, and a predetermined amount of powdered tea X corresponding to the amount of rotation corresponds as shown in FIG. Is pushed out from the lower end of the equal diameter portion 37 while being gradually compressed while passing through the tapered through-hole 35 of the damming device 30 and filled under the outlet pipe 16 of the storage chamber 15 It falls into the chute 18. After the rotation of the auger screw 20 is stopped, the through-hole 35 is closed with the compressed powder tea X.

  At the same time, the cutting device 40 is closed, the open / close plates 46 of the pair of cutting blades 45 approach each other along the lower surface of the protruding portion 33 of the damming tool 30, and the both blade portions 47 abut each other at the center position of the through hole 35. Then, the through hole 35 (equal diameter portion 37) is closed. At this time, if there is a powdered tea X hanging from the lower surface of the through hole 35 of the damming tool 30, it is cut as shown in FIG. 5 and then naturally falls into the filling chute 18. After that, the cutting device 40 is opened to open the pair of cutting blades 45 to the original posture, and the above-described operation is repeated for the next semi-packaging bag to be filled with the powdered tea X.

  As described above, in this embodiment, the cutting device 40 is provided on the lower surface of the damming tool 30, and even if the powdered tea X does not fall off from the lower surface of the through hole 35 of the damming tool 30, it is immediately cut. Take measures to drop. In other words, during each filling operation, a certain amount of powdered tea X is pushed out from the lower surface of the weir stop 30 with a predetermined amount of rotation of the auger screw 20, but once pushed out, the one that has been cut is completely included. As a result, a certain amount of powdered tea X can be supplied.

  The powdered tea X is pushed out while being gradually compressed through the constricted through-hole 35 in the damming tool 30. In other words, the powdered tea X is pushed out without being scattered in the circumferential direction while being pushed toward the center of the damming tool 30. Therefore, the entire amount is reliably dropped and supplied toward the filling chute 18 disposed below the outlet pipe 16 of the hopper 11. Moreover, since the powdered tea X is compressed in the single through-hole 35, the density can be made constant, and a certain amount of the powdered tea X can be supplied more reliably.

  When cutting the powdered tea X hanging from the lower surface of the through hole 35 of the damming tool 30, the cut powdered tea X is surely cut because the pair of cutting blades 45 are advanced so as to abut against each other. Therefore, the diameter of the filling chute 18 that receives the powdered tea X can be kept as small as possible.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The advancing / retreating drive means of the cutting blade that is a cutting member is not limited to the air chuck exemplified in the above embodiment, and other drive means may be used.
(2) The mounting structure of the damming stopper may be a press-fit structure or a structure that is secured with a screw provided separately.

(3) In the above embodiment, powdered tea is exemplified as a powder that is a filling material, but the present invention is particularly effective when applied to a case where fine particles such as cocoa are filled in addition to powdered tea. is there.
(4) The packaging bag may be another type of packaging bag, such as a stick-type packaging bag in which the back attachment is an envelope attachment type, or a three-side sealed packaging bag in which the upper and lower sides and one side edge of the packaging bag are sealed. .
(5) The packaging machine is not limited to the vertical multi-row filling and packaging machine exemplified in the above embodiment, and may be a case where other types of packaging machines such as a single-row vertical filling and packaging machine are applied. .

X ... Powdered tea (powder)
DESCRIPTION OF SYMBOLS 10 ... Fixed_quantity | feed_rate apparatus 11 ... Hopper 15 ... Storage chamber 16 ... Outlet pipe 17 ... Male screw 20 ... Auger screw 22 ... Screw part 30 ... Damping tool 31 ... Perimeter wall 32 ... Bottom part 33 ... Projection part 34 ... Female screw 35 ... Through-hole ( Aperture)
36 ... Tapered portion 40 ... Cutting device 41 ... Air chuck 42 ... Claw portion 45 ... Cutting blade (cutting member)
46 ... Opening / closing plate 47 ... Blade 48 ... Mounting plate

Claims (2)

A hopper for storing powder;
An outlet pipe provided downward from the bottom of the hopper;
An auger screw that faces the outlet pipe and can be driven to rotate around the vertical axis;
A filling chute disposed below the outlet pipe and having a lower end facing the packaging bag;
A damming tool having an opening that is provided at the lower end of the outlet pipe and can be extruded while compressing powder;
A cutting member that is driven to advance and retreat along the lower surface of the damming tool and cuts the powder hanging from the lower surface of the damming tool,
Is provided ,
In addition, the damming device has a cap shape having a thick bottom portion fitted to the lower end of the outlet pipe of the hopper, and the bottom portion of the damming device is gradually reduced in diameter toward the lower surface. A tapered through hole is formed,
An apparatus for quantitatively supplying powder in a packaging machine , wherein the cutting member is formed such that a pair of cutting blades can be advanced and retracted in a direction in which the cutting blades face each other . The shape of the through hole formed in the bottom of the damming tool is that a straight portion having the same diameter as the small diameter portion at the lower end of the tapered portion is continuously provided below the tapered portion that is gradually reduced in diameter toward the lower end. The apparatus for quantitatively supplying powder in a packaging machine according to claim 1, wherein:

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