JPH0344737Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a hopper used in a vibrating feeder, and more particularly to the structure of a hopper for a vibrating feeder configured to prevent bridging of powder and granules.

[Conventional technology]

A vibrating feeder (straight feeder) is one of the devices for supplying a predetermined amount of powder or granular material. This feeder has the advantages of being able to precisely control the supply amount of powder and granules, and that it is easy to adjust the discharge amount by adjusting the vibration frequency.For example, it is possible to precisely control the discharge amount of chemicals, drugs, etc. It is suitable for weighing powder or granular materials that need to be weighed.

FIG. 4 shows a vibrating feeder equipped with a disposable hopper, which has been separately proposed by the applicant. In this device, a hopper body 2 made of paper, polymeric material, etc. is placed on a vibration feeder body 1, and a hopper part 3 is placed on the vibration feeder body 1.
When the discharge of the predetermined granular material filled in the hopper is completed, this hopper main body 2 is discarded, and a new hopper is used to fill and discharge another granular material. This completely prevents the previous powder from being mixed in when discharging another powder or granule (medicine). This type of hopper can be suitably used for materials such as chemicals and drugs that require extreme caution against mixing with other powder or granules.

[Problem that the invention attempts to solve]

The disposable hopper described above and the conventional hopper fixed to the vibrating feeder main body 1 have the following problems, and solutions to these problems are desired.

That is, in FIG. 5, the hopper part 3 of the hopper main body 2 is filled with powder and granular material 4 to be discharged, and by the operation of the vibrating feeder 1, the stored powder and granular material 4 in the hopper part 3 is moved into the trough. 5 side, and is discharged falling from the discharge end, and the discharge amount is measured by a measuring device (not shown). In this case, the lower end of the front wall 3a of the hopper part 3 is positioned so as to partially block the upper space of the trough 5, and is configured to function as a dam plate. The powder and granular material 4 is not discharged in large quantities at one time.

In such a configuration, as the discharge of the powder and granules progresses, the powder and granules 4 often cause bridging at this weir plate portion 3a', resulting in poor discharge. Since the hopper body 2 is constantly vibrated by the vibrating feeder 1 to discharge the powder,
The entire stored powder and granular material 4 in the hopper section 3 is also moving forward toward the discharge end side as shown by the arrow. Therefore, if a discharge failure occurs in the weir plate portion 3a', bridging will easily occur due to the forward force of the stored granular material 4 in the hopper section 3, making it impossible to discharge the granular material at all. Naturally, bridging occurs particularly frequently in powder particles having a large angle of repose θ. In addition, weir plate part 3
Most of the bridging can be prevented by arranging the lower end of a' high and making a large gap h, but as mentioned above, this method cannot be put to practical use because the flow of the powder becomes unstable.

FIG. 6 shows one means used to solve this problem. In this structure, the lower end of the weir plate portion 3a' of the hopper front wall 3a is formed into a comb shape to prevent bridging. However, the actual situation is that it has little effect on bridging that occurs in the upper part of the comb-shaped portion, and that it is of little use in preventing bridging in the gap 10 after all.

Also, a configuration has been proposed in which a vibrating body 6 made of piezoelectric ceramics or the like is arranged on this weir plate part 3a' (see Fig. 5), and this weir plate part 3a' is forcibly vibrated separately from the vibration of the vibration feeder. ing. This method is very effective in destroying bridges and discharging powder and granules. However, it is not easy to secure the power supply for the vibrating body,
Moreover, as a matter of course, the manufacturing cost of the hopper section increases significantly, and the above-mentioned disposable hopper cannot be used at all from a cost standpoint.

[Means for solving problems]

The present invention has been constructed in view of the above-mentioned problems, and provides a vibrating feeder in which one or more folded portions are formed in the hopper portion so that the folded portions are bent into the hopper portion at a certain angle and protrude from the front wall of the hopper portion. This is a hotspa for use.

[Effect]

The protruding part in the hopper part of the folded part in the hopper part formed on the front wall of the hopper part opposes the granular material stored in the hopper moving toward the discharge end side, and the flow of this powder material is directed to the protruding part in the hopper part. Furthermore, the vibration of the wall surface forming this fold effectively prevents bridging of the powder near the front wall.
To properly discharge powder and granular material through a gap between a weir plate part and a trough.

〔Example〕

Embodiments of the present invention will be specifically described below with reference to the drawings.

1 and 2 show a first embodiment of the invention. The hopper main body 2 is constructed based on a disposable hopper that has been proposed separately by the inventors of the present invention, and is made of paper or a material having the same effect as paper, a polymeric material, or the like. The front wall 3a of the hopper part 3 is bent at a bending line 7a so as to protrude into the hopper part 3 at a predetermined angle α. As a result, each of the front walls 7b, 7b, which are divided into two parts about the bending line 7a, is positioned at a predetermined angle β with respect to the moving direction D of the powder and granular material stored in the hopper. Further, the lower end portion 7b' of the front wall configured in this manner is located in a protruding position so as to partially block the lower space of the hopper portion 3 that is connected to the trough 5, and this protruding portion serves as a weir plate when discharging powder and granules. will be fulfilled. In this case, the width W1 of the trough 5 is narrower than the width W2 of the upper edge of the hopper portion 3, so the angle γ formed by the weir plate portion is more acute than the angle α.

The hopper body 2 constructed as described above is attached to the vibrating feeder 1 shown in FIG. 4, the hopper part 3 is filled with a predetermined powder, and the vibrating feeder 1 is operated.

The vibration of the vibrating feeder 1 is transmitted to the entire hopper body 2, and this vibration causes the stored powder and granular material 4 in the hopper portion 3 to move toward the trough 5 side. In this case, the front wall 3a
protrudes to oppose the movement of the granular material, and as shown in FIG. 2, this protruding portion disperses the movement of the granular material into two parts, much like the tip of a ratchet wheel. Furthermore, since each of the wall surfaces 7b, 7b is positioned at a predetermined angle β with respect to the vibration of the vibrating feeder which vibrates in the same direction as the moving direction D of the powder and granular material, the wall surfaces 7b, 7b themselves also vibrate well. ,
The behavior of the granular material 4 that is about to form a bridge is disturbed, and the granular material 4 is smoothly discharged to the trough 5 side via the weir plate part.

Although the explanation has been given above using a disposable type hopper as an example, it is needless to say that the configuration is not limited to this, and bridging can be prevented even if the hopper is fixed to a vibrating feeder with the above configuration. In this case, if the fixed hopper is made of a strong material that is not suitable for vibrations, such as metal, it is desirable that at least the front wall portion be made of a material that is somewhat flexible and easily vibrates.

FIG. 3 shows another embodiment.

In this embodiment, a plurality of bent portions are formed on the front wall 3a, and the entire front wall is formed into a folding screen shape.
By forming it in this way, the movement of the powder 4 in the hopper part 3 is more finely dispersed, and each side wall part of the folded part in the hopper is oriented at a constant angle in the vibration direction as described above. Since the feeder is located at the same position, it vibrates in response to the vibration of the vibrating feeder, and therefore, it is possible to effectively prevent bridging of the powder and granular material.

〔effect〕

As specifically shown above, the present invention has one or more folded parts in the hopper part that are folded into the hopper part and protrude at a certain angle with respect to the front wall of the hopper part of the hopper main body. By forming this shape, the movement of the powder and granular material that is about to move toward the discharge end side is distributed, and the side wall of this folded part vibrates in response to the vibration of the vibrating feeder, thereby preventing the bridging of the powder and granular material in the hopper part. effectively prevent
Powder and granular materials can be discharged well at all times.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the hopper main body showing the first embodiment of the present invention, Fig. 2 is a plan view of the hopper main body shown in Fig. 1, and Fig. 3 is a perspective view of the hopper main body showing the second embodiment. 4 is a perspective view of a vibrating feeder on which a conventional hopper is mounted, FIG. 5 is a longitudinal sectional view of the hopper main body shown in FIG. 4, and FIG. 6 is a front partial view of another conventional hopper. It is. 1... Vibration feeder, 2... Hopper body, 3...
...Hopper part, 4...Powder material, 5...Trough, 7a
...Folding line.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The front wall of the hopper part of the hopper main body in a vibrating feeder is provided with one or more folded parts within the hopper part that are bent and protrude at a certain angle with respect to the inside of the hopper part. A hopper for vibrating feeders featuring: (2) The hopper for a vibrating feeder according to claim 1, wherein a plurality of folded portions of the hopper portion are formed in a folding screen shape. (3) Utility model registration claim No. 1, characterized in that, of the hopper main body, at least the front wall of the hopper part that forms the folded part is formed of a material that is flexible enough to vibrate due to vibrations of the vibrating feeder. A hopper for a vibrating feeder as described in item 1) or item (2).