JP3000566U - Powder bagging equipment - Google Patents

Abstract

(57) [Summary] (Modified) [Objective] To provide a powder bagging device having a simple structure and a tapping device capable of continuously tapping in a place where powder is scattered for a long period of time. A bag support base, an air cylinder 20 for moving a piston 21 connected to the bag support base up and down, a cushioning means for cushioning a shock when the piston 21 of the air cylinder 20 descends, and an air cylinder 20 A tapping device 6 including a valve for supplying and stopping compressed air and a control unit for controlling the valve causes the bag W to perform a tapping operation to drop the powder in the bag.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the field of handling various powders such as foods, pharmaceuticals, building materials, and more particularly to a device used for bagging a certain amount of powder.

[0002]

[Prior art]

 2. Description of the Related Art As a powder bag packing device, there is a device that measures the amount of powder falling from a powder drop opening of a hopper and drops it into a powder container such as a bag or can prepared in advance. FIG. 3 shows a schematic structure of a conventional powder bagging device. This bag packing device is a transfer device 1 for transferring a bag W for powder storage along a guide rail 10 in the CF direction in the figure, and an embossing member 20 is inserted into the bag W to open and mold the bag W. Forming device 2, coarse weighing device 4 that bulks a certain amount of powder P from hopper 3 and fills bag W, precise weighing device 5 that fills powder P to a target filling amount, and tapping bag W The bag W comprises a tapping device 6 for making the density of the powder P uniform in the bag W, and a sealing device 7 for sealing the bag W by heating and welding the upper end opening of the bag W.

In this apparatus, the bulking device 40 of the coarse weighing device 4 is rotated by a motor M around a rotary shaft to bulk up a fixed volume of powder P, and the bulked powder P is transferred. The bag W conveyed by the feeding device 1 and opened by the molding device 2 is filled through a predetermined powder dropping port. Subsequently, the bag W is placed on the electronic balance 51 (attached to a part of the guide rail 10 of the transfer device 1) by the transfer device 1 and weighs the bag W by the precise weighing device 5 until the target weight is reached. The powder P is packed. The precise weighing device 5 is composed of a conveyor belt 50 having a concave portion of a constant small volume, and the powder clogged in the concave portion is dropped one by one by the rotation of the conveyor belt 50. The weight can be brought close to the target weight exactly.

The bag W that has reached the target weight is again conveyed by the transfer device 1 and is sent to the tapping device 6, and the tapping device 6 applies vertical vibration to the bag, so that the powder inside the bag is transferred. Will be evenly clogged.

By this tapping operation, the powder P settles to the bottom in the bag, and the powder attached near the mouth of the bag is removed. Subsequently, the bag W is sent to the sealing device 7 by the transfer device 1 and sealed.

The tapping device may be attached, for example, at a position (point A in FIG. 3) where the powder is packed by the coarse weighing device 4, other than the case where the tapping device is provided at a position beyond the precise weighing device. At this time, the center of gravity of the bag W filled with the powder is lowered, so that the subsequent transportation is further stabilized.

FIG. 4 shows a perspective view of an example of such a conventional tapping device 6. Conventionally, tapping devices that use special cams have been used. That is, a part of the guide rail 10 is divided to form a block 11, and the block 11 has a protruding portion 12 on the lower surface. The special cam 13 which is rotationally driven by the motor M and the protruding portion 12 are attached so as to come into contact with each other. The special cam 13 has a shape having a step on a part of its circumference, and drops when the special cam 13 rotates and the projection 12 passes through the step of the special cam 13. Due to this drop, the bag W on the block 11 vibrates, and the powder P in the bag begins to settle at the bottom.

[0008]

【Problems to be solved】

 The tapping in the conventional bagging device as described above has the following problems.

First, the special cam is rotated to perform the tapping operation. Since the outer peripheral surface of the special cam is in contact with the protruding portion, friction is generated between the special cam surface and the protruding portion. Occurs. Therefore, it was necessary to use a large motor to overcome the friction, which was an obstacle when manufacturing a bag filling device in a limited space. Of course, it is conceivable to apply a lubricant to the cam surface to reduce friction, but due to the handling of powder, the scattered powder adheres to the lubricant-coated cam surface, increasing friction. is what happened. In addition, depending on the type of powder such as food, lubricants could not be used because they dislike oil.

Secondly, the motor connected to the cam shaft for rotating the special cam is installed in the vicinity of the special cam. However, in order to assemble the device compactly, the existence of the motor is omitted. It was an obstacle to space conversion. In addition, since an electronic balance that dislikes vibrations is installed near the tapping device, it is necessary to attach a vibration isolation table to eliminate vibrations caused by the motor, which poses the problem of vibration isolation and space saving. It was happening.

It is an object of the present invention to solve the problem of tapping of such a powder bag packing device, and to provide a powder bag packing device having a simple structure, easy cleaning, and compact size.

[0012]

[Means for Solving the Problems]

 The present invention, which has been made to solve the above-mentioned problems, is a powder bag packing device, which is provided with a tapping device, and the tapping device supports a bag for powder powder storage. An air cylinder that raises and lowers the connected piston, a cushioning means that absorbs the shock when the piston of the air cylinder descends, a valve that supplies and stops compressed air to the air cylinder, and a control that controls this valve. The bag supporting base is tapped by the supply and exhaust of compressed air to drop the powder in the bag.

The operation of the powder bag packing device having this structure will be described below.

[0014]

[Action]

 The tapping device of the powder bag packing device of the present invention opens and closes a valve in response to a signal from the control unit, and opens and closes the valve to supply and exhaust compressed air to the air cylinder. Piston of the air cylinder The piston of the air cylinder rises due to the supply of compressed air, and then the compressed air in the air cylinder is exhausted and the piston is suddenly lowered to give vibration. At this time, a certain amount of strong vibration is required, but if it is too strong, the powder will be scattered, and shock will be shocked by the buffering means using a coil spring or elastic rubber so that the vibration will not be too strong. Will be alleviated.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of a powder bag packing device according to the present invention, and FIG. 2 is a perspective view of a part thereof. In this embodiment, the tapping device is attached to the position (point A) where the powder is packed by the coarse weighing device of FIG. In the figure, the same parts as those of the conventional example (FIG. 3) are designated by the same reference numerals unless otherwise specified, and thus the description thereof is omitted.

In the figure, reference numeral 11 is a block 11 that functions as a bag support base that supports a bag W for storing powders, and 20 is an air cylinder driven by compressed air supplied from a compressed air source provided outside. And, 21 is the piston. A coil spring 22 is attached so as to wind around the outer circumference of the piston 21.

A solenoid valve 23 is provided in the middle of the compressed air supply pipe and the compressed air exhaust pipe to the air cylinder 21 for flowing or stopping the compressed air. In addition, a speed controller 24 (throttle) is provided so that the compressed air supply and exhaust speeds can be adjusted as necessary in consideration of the pipe diameter and the like. A sequencer 25 is used as a control unit that sends an opening / closing signal for the solenoid valve 23. The sequencer 25 is also connected to the driving device 27 of the coarse weighing device 4 for supplying the powder P to the bag W, the transfer device 1, the molding device 2, the precise weighing device 5, and the sealing device 7 to operate the respective devices. Are in control.

Next, the operation of the tapping device 6 will be described. The bag W molded by the molding device 2 as in the conventional example of FIG. 3 is conveyed by the transfer device 1 to the powder dropping position (point A) of the rough weighing device 4. Then, the drive device 27 of the coarse weighing device 4 is driven to weigh a predetermined amount of the powder P, and the powder P is dropped into the bag W. While the powder P is falling or after the drop, the tapping device 6 operates as follows.

A signal from the sequencer 25 is sent to the solenoid valve 23, the solenoid valve 23 on the supply pipe side is opened, and compressed air is sent to the air cylinder 20. The piston 21 of the air cylinder 20 is raised by receiving the supply of compressed air, and the block 11 and the bag W placed on the block 11 are lifted. The ascending speed 24 at this time is adjusted by the speed controller 24. Subsequently, after the solenoid valve 23 on the supply pipe side is closed, the solenoid valve 23 on the exhaust pipe side is opened. Then, the compressed air in the air cylinder 20 is exhausted, so that the piston 21 descends, and the block 11 and the bag W placed on the block 11 descend. Then, when it descends to the lowest point, vibration will be applied. If the vibration at this time is too strong, the powder P will be scattered from the bag W due to the received vibration. Therefore, in order to absorb the impact, the block 11 should contact the coil spring 22 immediately before the lowest point. This prevents excessive impact from being applied. After that, the bag W can be dapped by repeating the ascending / descending operation.

The coil spring 22 is attached so as to wind the piston 21, but instead of or at the same time as the coil spring 22, elastic rubber is attached to the upper surface of the case of the air cylinder 20, and the block 11 descending from above is elastic. The impact may be mitigated by colliding with rubber. Further, when the diameter of the exhaust pipe is large, the descending speed of the piston 21 becomes faster, so the descending speed may be suppressed by the speed controller 24. However, it is necessary to be careful not to reduce the descent rate too much and the impact will not become too weak.

After the powder P in the bag W is sunk to the bottom by tapping, the powder W is precisely supplied to the target weight by the precise weighing device as in the conventional example, and then the bag W is moved by the transfer device 1. It is sent to the sealing device 7 and sealed. Before this sealing operation, the tapping operation may be performed again by the same tapping device. By doing this, the powder adhering to the mouth of the bag can be reliably dropped, and the sealing failure due to the powder adhering to the mouth during the subsequent sealing work can be prevented. be able to.

When the powder bagging device is continuously operated, the scattered powder adheres to the vicinity of the tapping device near the powder dropping port, but the tapping device of the present invention scatters the powder. Since there is only the air cylinder 20, the block 11 and the coil spring as a cushioning means in the vicinity of the place where the dust is adhered, there is no hindrance to the operation even if the powder adheres to these components, so maintenance work such as cleaning is performed. It is possible to operate continuously for a long period of time without frequent operation.

In the air cylinder used in this embodiment, when compressed air is supplied, the piston expands, and when the compressed air is discharged, the piston contracts, but the invention is not limited to this. Any type may be used as long as the piston can be expanded and contracted by the exhaust.

[0024]

[Effect of device]

 As described above, according to the present invention, the tapping device for tapping the bag is composed of the air cylinder, the bag support connected to the piston, and the cushioning means by the coil spring or the elastic rubber. Therefore, even in an environment where powder is scattered, the tapping device can be continuously operated for a long period of time without causing malfunction due to friction such as when using a cam mechanism.

Further, since the compressed air source installed away from the device is used as the power source, it is not necessary to place a motor as a vibration source in the vicinity of the tapping device, and the device incorporating the tapping device can be downsized and reduced in vibration. Can be achieved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a powder bag packing device according to an embodiment of the present invention.

FIG. 2 is a partial view of a tapping device in the powder bag packing device of FIG.

FIG. 3 is an overall view of a conventional powder bagging device.

FIG. 4 is a block diagram of a tapping device used in a conventional powder bagging device.

[Explanation of symbols]

 1: Transfer device 2: Molding device 3: Hopper (powder tank) 4: Coarse weighing device 5: Precision weighing device 6: Tapping device 7: Sealing device 10: Guide rail 11: Block (bag support) 20: Air cylinder 21: Piston 22: Coil spring 23: Solenoid valve 24: Speed controller 25: Sequencer

Claims (5)

[Scope of utility model registration request] 1. A powder bag packing apparatus for weighing a predetermined amount of powder stored in a powder tank into a bag for storing powder, and a bag support for supporting the bag for storing powder. An air cylinder for raising and lowering a piston connected to the bag support, a cushioning device for cushioning a shock when the piston of the air cylinder descends, and a tapping device including a control unit for controlling the air cylinder are provided. A powder bagging device, characterized in that a tapping operation is applied to a bag support base by supplying and exhausting air to drop powder in the bag. 2. The powder bag packing device according to claim 1,
The powder bagging device molds a bag with an embossing member, a coarse weighing device that weighs and fills a predetermined amount of powder in the bag molded by the molding device, and a filling by the coarse weighing device. A precise weighing device that measures the difference between the weight and the target weight with a balance and additionally fills the shortage, a sealing device that seals the bag filled with powder by the precise weighing device, the molding device, and the weighing device. And a transfer device for transferring the bag to and from the sealing device, and the tapping device is provided at a powder dropping position of the rough weighing device or at a position immediately thereafter. Bagging equipment. 3. The powder bag packing device according to claim 1,
The powder bagging device molds a bag with an embossing member, a weighing device that weighs and fills a bag molded by the molding device with a predetermined amount of powder, and the powder is packed by the weighing device. A sealing device for sealing the packed bag, and a transfer device for transferring the bag between the molding device, the weighing device, and the sealing device, and the tapping device is positioned immediately before the sealing device. Alternatively, the powder bag packing device is provided at a position for performing a sealing operation. 4. The powder bag packing device according to claim 2,
The transfer device is provided with a guide rail having a groove provided in conformity with the shape of the bottom of the bag, and a part of the guide rail doubles as a bag support of the tapping device. . 5. The powder bag packing device according to claim 3,
The transfer device is provided with a guide rail having a groove provided in conformity with the shape of the bottom of the bag, and a part of the guide rail doubles as a bag support of the tapping device. .