JPS6124241B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slide valve mechanism that utilizes magnetic force and is extremely effective for use in dispensing devices, packaging machines, etc. that handle fine powder particles.

In equipment that handles powder and granular materials such as medicines, especially packaging machines such as drug packaging machines, the mechanical part that divides the powder (powder and granular materials) into smaller pieces and sequentially puts them into packaging bags is usually
It is equipped with a plate that slides along the lower end of a large number of measuring cells arranged in series, and when the measuring cells reach a predetermined position, the bottoms open one after another at the openings in the bottom plate, and the items inside the measuring cells fall through the chute. A method is often used in which the material is placed in bags waiting at the bottom (generally so-called continuous bags that are divided into consecutive bags) (for example, Japanese Utility Model Publication No. 52-22534, Japanese Utility Model Application Publication No. 54-85182, etc.). It depends on the scale of such a device, but if the processing speed is high, the measuring volume will naturally be sent sequentially to the chute at a high speed, and the bottom will open and close, and it will also be small and operate at low speed. As the bottom of the measuring box is repeatedly opened and closed, powder and granules get stuck in the sliding parts and aggregate, making it difficult to operate the device. In addition, wear may occur between the two, resulting in leakage, or a serious situation may occur, such as foreign matter being mixed in due to wear. In addition, in the case of a type in which an opening/closing plate is pivotally attached to each bottom of the dispensing measuring box (for example, disclosed in Japanese Patent Publication No. 46-28861), the opening/closing plate is closed by a spring inside the measuring box to hold the opening/closing plate. In such a structure, when the bottom is first opened, the plate does not open all the way to the bottom, so powder tends to adhere to the plate, making it impossible to close it sufficiently. Furthermore, if the spring is strengthened to make the closure more effective, there is a risk that the spring will break and enter the powder. However, due to this sliding or opening/closing movement, adhesion of powder and granules,
If you try to prevent movement, not only will the structure of that part become complicated, but if you try to improve the accuracy, the slightly attached fine powder particles will rub and wear out the sliding surfaces, which will actually cause leaks. This may be more likely to occur, or may cause the movement to become less smooth. Therefore, cleaning using air or the like may be considered, but if it is done after each movement, the work efficiency will decrease, and the blowing of air will also scatter fine particles around, so this is a preventive measure. The gate valve mechanism in the part handling the powder and granular materials is not yet in a satisfactory state, as it requires a further complicated device.

Problems like this often occur in equipment that handles fine powder, and as the sliding parts wear out due to friction, the fine powder generated by metal abrasion may damage the powder or granule being handled. This can be a serious drawback depending on the type of product being handled.

The present invention has been made in view of the current situation, and solves the problems of conventional devices for weighing and packaging powder and granular materials, and has a simple structure that uses magnetic force to connect the bottom surface of the box and the opening/closing plate. The object of the present invention is to provide a slide valve mechanism for a powder packaging device that can be opened and closed reliably without sliding.

The present invention provides a gate valve mechanism of a powder/grain material division/discharge section of a packaging device that partitions powder/grain material into required amounts and quantitatively handles the powder/grain material to be supplied to a target portion, which is provided with an opening made of a non-magnetic material. The lower surface of the edge along the opening of the powder or granular material receiving section is made smooth, one end of which is pivotally movable below the receiving section, and a magnetic material or a permanent magnet is attached to the lower surface. A valve plate is attached, and the lower surface of the opening of the powder/granular material receiving portion is closed by the valve plate, and the valve plate is arranged at the same pole as the magnetic pole on the valve plate side with a slight gap from the lower surface of the valve plate. A support stand with a magnet plate attached is provided, and either the powder receiving part side or the magnet plate side is moved so that the valve plate opens at the interrupted position on the magnet plate side, and the powder is placed directly below it. The structure includes a chute for transferring the body to the target object, and the valve plate closes due to the repulsive action of the magnet and opens when it leaves the magnetic field, allowing reliable opening and closing operations without creating frictional force. This is how it was done.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 3 show the main parts of a device for subdividing and packaging powders, which has a distributor in which a plurality of distribution containers are arranged at a constant pitch. The distributor 1 has a long and slender shape in which a plurality of distribution boxes 3 for receiving powder and granular materials are arranged in series at a required pitch, and the main body 2 is made of a non-magnetic material such as synthetic resin or aluminum. The lower edge 4 of the opening of each distribution box 3 is finished flat, and a plurality of rotating rollers 5 are rotatably attached laterally to the upper portions of both side surfaces 2', 2'. . Further, a valve plate mounting plate 6 made of a non-magnetic material is provided along the lower half of the side surfaces 2' and 2' of the distributor main body 2 over almost the entire length, and this mounting plate 6 is attached to the distributor 1 as shown in the figure.
At the intermediate position of the partition wall 2'' of each distribution volume 3 of the main body, provide the required number of downward protruding parts 6' (same as the number of distribution volumes).
The protrusions 6' are each provided with a valve plate shaft pin support hole 7 formed by a short elongated hole in the vertical direction.

The valve plate 8 attached to the lower surface of the opening of the distribution box 3 of the main body of the distributor 1 is made of stainless steel plate,
Support pins 8' are integrally formed on both sides of one end,
This support pin 8' portion is loosely inserted into the support hole 7 formed on the mounting plate protrusion 6' on the side of the distributor main body 2, and the distribution box 3 is supported.
A magnet plate 9 made of a permanent magnet is attached to the lower surface of the valve plate 8 so that it can be opened and closed freely.
The magnetic poles are all placed in the same arrangement. Note that a protruding portion 8'' (see FIG. 3) provided on the valve plate 8 at a position opposite to the portion where the support pin 8' is formed serves as a guide portion by the guide rail 11.

The distributor 1 equipped with such a valve plate 8 is made movable by engaging rotating rollers 5 with guide rails 21, 21 attached to a part of the frame 20 of the packaging device. Directly below the main body is a pedestal 1 attached to a part of the frame 20.
2, a strip-shaped permanent magnet plate 10 is attached via a mounting piece 13 made of a non-magnetic material, and this strip-shaped lower magnet plate 10 is mounted relative to the valve plate 8 so that its magnetic poles are in the same direction as the magnetic pole arrangement of the valve plate 8. The magnet plate 9 to which the valve plate 8 is attached and the lower magnet plate 10 are disposed with a gap as close as possible to each other. Note that this lower magnet plate 10
It is desirable that the total length of the distributor body 2 is adjusted to match the total length of the distributor body 2.

A chute 14 is supported by a frame at the lower front end of the pedestal 12 to which the lower magnet plate 10 is attached, and below the chute 14 is a series of packaging bags that are intermittently fed horizontally by known means. The bags 30 are configured to receive the powder and granular material to be packaged sequentially through the chute 14, and the feeding of the packaging bags 30 is synchronized with the movement of the distributor. By traction or other meshing drive between the rack and pinion, the distribution cells are moved forward intermittently by 31 pitches, and after all or the required number of distribution cells have been moved, they are quickly returned to the original position. Regarding the supply of powder and granules to each distribution tank 3 of the main body of the distributor 1, in addition to manual distribution, a mechanism (not shown) that automatically feeds a fixed amount into the distribution tank can be arranged to sequentially distribute the material. You can also do this.

In the device of the present invention constructed as described above, the distributor 1 is in a fixed position as shown in FIG. In this state, the lower surface of the opening of each distribution box 3 is closed by the valve plate 8.

When this valve plate 8 is in contact with the lower surface edge 4 of the opening of the distribution cell 3, the magnetic plate 9 attached to the lower surface of the valve plate 8 and the lower magnetic plate 10 located below it have the same magnetic pole. Because they are arranged to form poles, a repulsive magnetic force acts between both magnet plates 9 and 10, and while the lower magnet plate 10 is fixed via the pedestal 12, the lower magnet plate 10 The magnet plate 9 is arranged such that the valve plate 8 is freely inserted into the protrusion support hole 7 of the valve plate mounting plate 6 attached to the main body of the distributor 1 via the shaft pins 8', 8', and is opposite to its pivot portion. Since the protruding part 8'' on the side is slidably supported by the guide rail, it is strongly pressed against the lower surface of the distributor by the repulsive force of the magnetic force and comes into close contact with it, so that there is no leakage of powder or granules. .

When this distributor 1 is intermittently advanced one pitch at a time by the driving means, as the distributor 1 moves forward, the valve plate 8, which has been pressed against the lower edge 4 by being repelled by the magnetism of the lower magnet plate 10, is moved by the magnetic force. Due to the elimination of the repulsive force, the distance from the lower magnet plate 10 due to its own weight and the weight of the powder A received in the distribution box 3 increases.
As shown in the figure, the powder and granular material A is rotated downward and dropped into the chute 14 located directly below it, and is received through the chute 14 into one compartment of the packaging bag 30 located just below it. , this Renbukuro 30
are sealed and packaged by a horizontal heater plate (not shown) while being sequentially moved. In this way, distributor 1
As the valve plate 8 moves forward sequentially, the valve plate 8 automatically opens as it moves away from the magnetic field with the lower magnet plate 10, and the received powder and granular material A in the distribution box 3 is supplied to the packaging bag 30 via the chute 14. When all distributor valves are opened and the distributor 1 is moved back, the valve plate 8 is lifted by the front end of the lower magnet plate 10 and at the same time receives the repulsive force of the same polarity in the magnetic field and automatically rotates in sequence. The valve is closed automatically, and is strongly pressed against the lower edge 4, making it easy to receive the next powder or granular material.

Because it operates in this manner, the valve plate that opens and closes the lower surface of each distribution cell opening of the distributor is separated from the magnetic field by the repulsive force caused by the magnetic plate attached to the valve plate and the magnetic plate on the pedestal side. There is no contact at all during movement other than the position where the valve is opened, and the valve is skillfully closed using magnetic force without applying any other external force, so there is no sliding friction and the valve can be closed accurately. It can be expected to operate smoothly and has a simplified structure, making it trouble-free.Especially for products that handle fine powder, the on-off valve is not a sliding type, but can be fully opened by its own weight. Unlike conventional valves, powder does not aggregate and stick to the sliding parts and the valve does not close properly, and the valve can open and close naturally using magnetic force, ensuring reliable valve function at all times. It is.

According to the present invention, by utilizing the phenomenon of repulsion caused by arranging magnetic poles with the same polarity, this repulsion force presses the valve plate against the lower edge of the opening to close the valve, and this repulsion force is released. When the valve plate reaches the discontinuous position of the lower magnet plate, the valve plate automatically opens and the powder and granules received in the upper part of the valve plate can be thrown into the packaging container through the lower chute. The main body of the distributor is made into a disk shape, and a large number of distribution cells are arranged near the outer periphery, and a large number of distribution cells are arranged near the outer periphery, and the distribution cells are arranged on the bottom surface of the distributor body, so that the positional relationship between the distribution cell, the valve plate, and the lower magnet plate is basically maintained. The valve plate is attached by providing a hinge part to support the valve plate in a certain direction, and a magnet plate is attached to the lower surface of the valve plate, and an annular ring is attached at the bottom with a required section interrupted at one place. If the magnet plate is arranged so that a repulsive force is generated between the magnet plate attached to the valve plate and the lower magnet plate, and the chute is placed at the interrupted position, the above-mentioned linear operation can be achieved even in a rotary packaging machine. It can be operated in the same way as the model.

Further, based on the spirit of the present invention, as shown in FIGS. 5 and 6, the hopper 23 and the chute 1
A reciprocating slider 25 is disposed between the slider 25 and the slider 25, and a granular material receiving chamber 26 whose internal volume is variably adjustable is provided in the middle of the slider 25, and one adjacent position is adjacent to the hopper. Closing part 30
A valve plate 28 having a magnet plate 29 attached to the lower surface is provided on the lower surface of the receiving cell 26 in a manner similar to the embodiment described above, with one end supported by a shaft pin 28' on both sides, and the receiving cell 26 A lower magnet plate 10' is arranged so that when the valve plate 28 is at the lower position of the hopper 23, the valve plate 28 is repelled and pressed by magnetic force to close the valve.
This slider 25 moves and the lower magnet plate 1
It can also be used in a type that automatically opens the valve when the valve leaves the 0' position and drops the powder into a container (not shown) through the chute 14' directly below. In the case of such a single type, one or more of these may be arranged in the required number and operated in the required order. In the figure, 27 is an opening volume adjuster, 27' is an adjustment screw, 27'' is a handle, 26'
is the sliding part of the adjuster.

As described above, according to the present invention, a sliding distributor is used in an apparatus that handles a substance such as powder or granules, distributes the same in required amounts, and then supplies the same into containers such as packaging (including bags). The valve plate that opens and closes the opening of the valve is opened and closed by magnetic force, and in particular, the valve is actively closed by the repulsive force of the magnetic force, so there is no need for any complicated mechanism like in the past. By closing the valve accurately and opening the valve plate when the magnetic force is removed, all problems associated with wear due to sliding are eliminated, making it possible to open and close the valve easily and reliably. It can be said that its functions and effects are extremely significant in practical terms.

In addition, if a gasket is fixed to the upper surface of the valve plate or the lower edge of the opening of the distributor main body, the valve can be closed more effectively. Further, in accordance with the spirit of the present invention, the valve plate is closed using magnetic force, and the valve is opened when the repulsive force due to the magnetic force is removed, and the present invention is not limited to the above embodiments. It goes without saying that modifications and diversions within the technical scope of the invention belong to the present invention.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Figure 1 is a schematic diagram of the main parts of a reciprocating type dispensing powder/granule packaging device, Figure 2 is a XX view of Figure 1, Figure 3 is a diagram showing the valve plate, and Figure 4 is a dispensing device. Figures 5 and 6, which show a state in which the container has received powder or granular material, are other examples of the case of a single container. DESCRIPTION OF SYMBOLS 1... Distributor, 2... Main body, 3... Distribution box, 4... Lower edge of opening, 6... Valve plate mounting plate, 6'... Projection, 7
...Valve plate shaft pin support hole, 8, 28...Valve plate, 8', 2
8'...Support pin, 9...Magnet plate attached to the valve plate, 1
0,10'...lower magnet plate, 11,21...guide rail, 12...cradle, 14...chute, 20...frame, 23...hopper, 25...slider, 2
6... Powder/granular material receiving volume, A... Powder/granular material.

Claims (1)

[Claims] 1. In the slide valve mechanism of the powder/grain material removal section of a packaging device, etc. that quantitatively handles powder/grain material,
The main body of the distributor, which has an opening at the bottom of the box that receives powder and granules, is made of non-magnetic material, and the lower edge of the opening is smooth, and one end can be moved freely against this lower surface using a support piece made of non-magnetic material. A valve plate with a magnet attached to the lower surface is attached, and a repulsion force is generated on the lower side with a slight gap between the lower surface of the valve plate and the same pole as the magnetic pole on the valve plate side. By disposing a long magnetic plate and moving either the distributor or the lower magnetic plate attachment support, the valve plate will fully open by itself at the position where the repulsive force due to the magnetic force is removed. A slide valve mechanism for a powder packaging device, etc., characterized in that the powder is supplied from inside to a lower container or the like through a chute provided at the position.