JPH0639711U - Powder feeder - Google Patents

Abstract

(57) [Abstract] [Purpose] With a simple structure, the mouth of the bag can be reliably opened when powder is supplied, and powder scattering is prevented without limiting the powder supply amount. Provided is a powder feeder capable of efficiently bagging. [Structure] An outer cylinder 4 whose lower end is opened and which is vertically displaced along the outer circumference of an inner cylinder 3 for allowing powder to flow down.
In addition, in the vicinity of the lower end of the inner cylinder 3, it is rotatable about a support shaft 5 provided outside the inner cylinder, and is urged upward by a spring 6 toward the lower end of the inner cylinder 3. It has a lever 7 and is configured to rotate the lever 7 downward at the lower end of the outer cylinder 4 when the outer cylinder 4 is lowered, and to insert the tip of the outer cylinder 4 into the bag W.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a powder feeder suitable for bagging powder on a line.

[0002]

[Prior art]

 When packing powder by dropping and supplying powder into bags that are sequentially transported by a transport device, etc., in order to prevent powder scattering, lower the tube that guides the powder. The tip needs to be inserted inside the bag. However, an empty bag generally does not have its mouth completely open, which hinders insertion of the tube. Especially when the aluminum deposition bag is empty, there is a strong tendency for the mouth to close due to the elasticity of the folds of the material.

In view of such a point, conventionally, a method of adsorbing a bag from its side surface to open the mouth or a method for expanding the mouth without providing such a mouth opening mechanism is used, and a tube for guiding powder is made thin. A method of squeezing the tip into a funnel shape and inserting it into the narrow opening of the bag is used.

[0004]

[Problems to be solved by the device]

 Of the above-mentioned conventional measures, the method of adsorbing the bag from the side and opening the mouth is not only difficult to ensure its operation, but also has the drawback that the device becomes large-scale. .

On the other hand, in the method of narrowing the cylinder or squeezing it into a funnel shape, there is a problem that the powder supply amount per unit time is limited because the powder is easily clogged in the cylinder.

[0006] The purpose of the present invention is to ensure that the mouth of the bag can be widened when powder is supplied with a simple structure and that the powder can be scattered without limiting the powder supply amount. Another object of the present invention is to provide a powder feeder capable of efficiently performing bag packing while preventing the above.

[0007]

[Means for Solving the Problems]

 A structure for achieving the above object will be described with reference to FIGS. 2 and 3 which are drawings of an embodiment. In the powder feeder of the present invention, the upper end communicates with the feeder 2 and the lower end is open. Then, the inner cylinder 3 through which the powder flows down, and the outer cylinder 4 of which the lower end is opened by the driving mechanism vertically displaced along the outer circumference of the inner cylinder 3 and the inner cylinder 3 It is rotatable about a support shaft 5 provided near the lower end portion and outside the inner cylinder 3, and a spring 6 provided on the support shaft 5 moves upward toward the lower end portion of the inner cylinder 3. The outer cylinder 4 has a lever 7 that is biased to move downward, and the lower end of the outer cylinder 4 causes the lever 7 to rotate downward against the force of the spring 6. The part is characterized by being configured to be inserted into the bag.

[0008]

[Action]

 When the outer cylinder 4 is lowered with the mouth of the bag W positioned below the lower end opening of the inner cylinder 3, the lever 7 pivots downward and the tip of the lever 7 spreads the mouth of the bag W. By setting the lower end of the outer tube 4 so that the lower end thereof is inserted into the inside of the bag W, the outer tube 4 is reliably pushed and opened. Since the powder enters inside, the powder is supplied into the bag without scattering by allowing the powder to flow down through the inner cylinder 3 in that state.

When the outer cylinder 4 is raised after the completion of the supply, the lever 7 pivots upward by the force of the spring 6 and returns to the original position, so that the conveyance of the bag W is not hindered.

[0010]

【Example】

 FIG. 1 is a schematic view showing the overall configuration of the embodiment of the present invention, and FIG. 2 is an external perspective view of the main part thereof.

A feeder 2 is arranged at a lower end portion of a hopper 1 for accommodating the powder, and the powder in the hopper 1 is guided into the inner cylinder 3 by the feeder 2 in a certain volume. The inner cylinder 3 is open at its lower end, and an outer cylinder 4 is provided on the outer periphery of the inner cylinder 3 so as to be vertically displaceable with a slight gap therebetween. The lower end portion thereof is opened, and a vertical displacement can be given at a predetermined timing by a drive mechanism (not shown) such as an air cylinder.

A frame body 8 is separately supported near the lower end portion of the inner cylinder 3, and support shafts 5 parallel to each other are passed through the frame body 8 so as to pass outside the inner cylinder 3 and the outer cylinder 4. A plate-shaped lever 7 is rotatably supported on each of the support shafts 5 about each shaft.

Each lever 7 has a cross-sectional shape in which a predetermined length of its tip portion is bent downward, and each support shaft 5 is provided with a torsion coil spring 6 (see FIG. 3 described later). The levers 7 are elastically pressed upward by the torsion coil springs 6 and lightly pressed against the lower end of the inner cylinder 3. In this state, the tips of the levers 7 are close to each other with a slight gap.

The bags W to be packed with powder are sequentially and intermittently transferred by the transfer mechanism 10 along the horizontally extending guide 9 with the upper edge portion opened, and the stop position thereof is the inner cylinder 3. A certain amount of powder is supplied to the inside including immediately below, by the operation described later. In addition, the bag W to which the powder is supplied has its upper edge opening sealed by a sealing device 11 provided on the downstream side in the conveying direction. The height relationship between the lower end of the inner cylinder 3 and the frame 8 and the upper end of the bag W is set so that a slight gap of about 1 cm is opened between them.

Next, the operation of the above embodiment of the present invention will be described. FIG. 3 is an explanatory view showing the operation procedure in a sectional view. First, as shown in (A), when the empty bag W is conveyed to the position just below the inner cylinder 3, the outer cylinder 4 starts to descend as shown in (B). As the outer cylinder 4 descends, its lower end pushes each lever 7, and each lever 7 is rotated downward against the pressing force of the torsion coil spring 6 as shown in (C). As a result, the tip of each lever 7 enters the inside of the bag W and pushes the upper edge opening of the bag W from the inside.

After the state of (C), as shown in (D), when the tip end of the outer cylinder 4 exceeds the bent portion of each lever 7, the upper edge opening of the bag W is completely removed by the lever 7. The tip of the outer cylinder 4 is surely inserted into the bag W through the opening. In this state, as shown in (E), the powder is quantitatively supplied from the feeder 2 through the inner cylinder 3 into the bag W.

When the powder supply is completed, the outer cylinder 4 is raised to its original position, whereby the levers 7 are rotated upward by the elastic force of the torsion coil spring 6 to return to the state (A). After the supply of the bag W, the bag W can be conveyed and the next bag W can be conveyed.

As a result of the above-described operation, the tip of the outer cylinder 4 serving as the powder outlet is provided with the lever 7 even if the diameters of the outer cylinder 4 and the inner cylinder 3 are increased to the extent that the powder is not blocked. The state in which the bag W is pushed out by the opening is surely entered into the inside of the bag W, and the scattering of the powder to the outside and the adhesion of the bag W to the seal portion are reliably prevented.

In the above embodiments, a plate-shaped lever 7 is used and the pair of levers 7 are opposed to each other. However, depending on the shape of the bag, the folds, etc., the lever 7 may be, for example, a linear one. Of course, it is possible to make appropriate changes such as using four.

It is needless to say that the inner cylinder 3 and the outer cylinder 4 are not limited to cylindrical shapes and may be square cylinders.

[0021]

[Effect of device]

 As described above, according to the present invention, the outer cylinder, which is in communication with the feeder to let the powder flow down, is provided with the outer cylinder which is displaced in the vertical direction on the outer periphery of the inner cylinder, and the vicinity of the lower end of the inner cylinder is provided. , A support shaft is provided on the outside of the support shaft, and a pivotable lever and a spring for urging the lever upward toward the lower end of the inner cylinder are supported on the support shaft. Rotate this lever downward so that the tip of this lever pushes the mouth of the bag wide, and in that state inserts the outer cylinder into the bag to supply powder, so that the outer cylinder can be lifted and lowered. No other drive source is required except the drive mechanism, and the structure is simple and compact, and its operation is more reliable than the conventional device that opens the mouth by adsorbing the bag from the side. In addition, the diameter of the powder supply cylinder (inner cylinder and outer cylinder) does not cause powder clogging. It can be a minute a thickness and becomes, has enabled efficient bagging while suppressing the scattering of the powder.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the overall configuration of an embodiment of the present invention.

FIG. 2 is an external perspective view showing the configuration of the main part thereof.

FIG. 3 is an explanatory view showing an operation procedure of the embodiment of the present invention in a sectional view of essential parts.

[Explanation of symbols]

 1 Hopper 2 Feeder 3 Inner Cylinder 4 Outer Cylinder 5 Spindle 6 Torsion Coil Spring 7 Lever 8 Frame 9 Guide 10 Conveyor

Claims (1)

[Scope of utility model registration request] 1. An apparatus for supplying powder in a hopper into a bag via a feeder, wherein an upper end communicates with the feeder and a lower end opens so that the powder flows down into the inner cylinder. A vertical displacement along the outer circumference of the inner cylinder by a drive mechanism, the outer cylinder having a lower end opened, and the outer cylinder provided near the lower end of the inner cylinder and outside the inner cylinder. Is rotatable about a support shaft, and has a lever urged upward toward the lower end of the inner cylinder by a spring provided on the support shaft, and by downward displacement of the outer cylinder, A powder feeder, characterized in that the lower end of the outer cylinder is rotated downward against the force of a spring and the tip of the outer cylinder is inserted into the bag.