JPH03152012A - Raw material quantitative feeder - Google Patents

Abstract

PURPOSE:To improve a sieving function by a method wherein, in a vibration type raw material quantitative feeder having a double trough, a screen for removing wooden pieces is mounted to the outlet end of a lower trough, a raw material feed trough is arranged below the screen, and the tip of the upper raw material feed trough connected to an upper trough is positioned to the upper central part of the screen. CONSTITUTION:A screen 10 for removing wooden pieces is disposed to an output end 7a of a lower trough 7, and a raw material feed trough 9 is mounted therebelow. An upper raw material feed trough 13 is mounted to an outlet end 8a of an upper trough 8 in a manner that the tip of the trough is positioned at the upper central part of the screen 10 for removing wooden pieces. This constitution causes movement of a raw material along upper and lower troughs through excitation of a feeder A, causes sieving of the raw material by means of the screen for removing wooden pieces, and forces the raw material to drop on the raw material feed trough. This constitution improves sieving function.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a raw material quantitative feeder having double spiral troughs provided inside a cylindrical container.

[Conventional technology]

Vibration-type raw material quantitative feeders include a vibrating conveyor type that vibrates a horizontally arranged conveyor to transfer the raw material horizontally, and a vibrating type that vibrates a cylindrical container with a spiral trough inside. A parts feeder type is known in which raw materials put into a cylindrical container are raised along a trough and fed to the outside from the upper outlet end of the trough (see Japanese Utility Model Application No. 1988-79 '736). ).

This parts feeder model allows you to supply a large amount of raw materials, such as tobacco leaf veins (hereinafter referred to as ribs), all at once into a cylindrical container, and then feed the raw materials in the container in almost constant amounts. It has the advantage of being able to provide a

A spiral upper trough and a lower spiral trough are provided inside the cylindrical container, and the outlet ends of both troughs are arranged vertically on the upper part of the side wall. In the case where the conveyor is adapted to receive the material, the amount of raw material supplied to the conveyor is approximately twice that of a raw material quantitative feeder having - spiral troughs.

[Problem to be solved by the invention]

When feeding raw materials such as the backbone of leaf tobacco with the above-mentioned raw material quantitative feeder, impurities such as wood chips are mixed in the leaf tobacco, so the raw materials are not fed from the outlet ends of the upper and lower troughs. When feeding raw materials through a screen for removing wood chips to a conveyor table for the next process installed downstream, the raw materials are concentrated in one place on the screen for removing wood chips, and the raw materials fall onto the screen for removing wood chips. There was a problem that the sieving function was lost due to the accumulation of particles.

The present invention aims to solve this problem.

[Means to solve the problem]

To achieve the above object, the present invention provides a cylindrical container having a cylindrical side wall erected around the periphery of the bottom wall, extending spirally along the inner surface of the side wall and having an outlet end above the side wall. a lower trough; an upper trough spirally extending above the lower trough and having an outlet end above the outlet end; a pedestal on which the cylindrical container is mounted via a spring; and a bottom wall of the cylindrical container. A raw material quantitative feeder equipped with a vibration generator attached to the lower trough, a screen for removing wood chips is provided at the outlet end of the lower trough, and a raw material supply trough is provided below the screen for removing wood chips; An upper raw material supply trough was provided at the upper outlet end, the tip of which was located directly above the middle part of the screen for removing wood chips.

Further, the upper raw material supply trough has a shape in which one side in the width direction has an inclined surface that becomes lower toward the tip, and the length dimension to the tip becomes shorter on the side where the tip becomes lower. do.

[For production]

When the cylindrical container is vibrated by the vibration generator of the raw material metering feeder configured as described above and the raw material is inserted into the cylindrical container, the vibrated raw material is directed upward on the upper and lower troughs. The raw material discharged from the outlet end of the lower trough is supplied to the end of the wood chip removal screen closer to the lower trough, and the raw material discharged from the upper outlet end of the upper trough is removed from the tip of the upper raw material supply trough. It is fed into the middle part of the removal screen.

Therefore, since the raw material is distributed and supplied to the three parts of the wood chip removal screen, the sieving capacity of the wood chip removal screen is increased.

The raw material that has passed through the wood chip removal screen is supplied to the next conveyor via a raw material supply trough.

If the upper raw material supply trough is provided with an inclined surface and the tip shape is such that the length of the trough is shortened on the lower side of the inclined surface, the raw material delivered from the upper outlet end will be biased to one side of the upper raw material supply trough and the raw material will be delivered from the upper outlet end. The sieving capacity of the wood chip removal screen is further increased because it is substantially uniform across the width of the raw material supply trough.

〔Example〕

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

As shown in the front view of FIG. 4 and the plan view of FIG. A vibration table 2 is fixed to 1a, and the vibration table 2 is attached to the top of pillars 4 erected at the four corners of a rectangular base plate 3 via anti-vibration springs 5. A vibration generator 6 that repeatedly applies rotational moment to the cylindrical container 1 is attached.

A conical white dispensing plate 16 is provided on the upper surface of the bottom wall 1a.

On the inner surface of the side wall 1b of the cylindrical container 1, there is a wall from the bottom wall 1a to the side wall 1.
A lower trough 7 spirally extending along the lower trough 7 and an upper trough 8 spirally extending above the lower trough 7 are provided.

The outlet ends 7a and 8a of the lower trough 7 and the upper trough 8 are arranged vertically above the side wall 1b, and the outlet ends 7a are provided with a wood chip removal screen 10 disposed on the raw material supply trough 9. connects.

As shown in FIG. 3, the raw material supply trough 9 has a U-shaped cross section formed by a bottom wall 9a and covers 9b erected at both ends of the bottom wall 9a.
In this example, a plurality of round bars 12 are fixed to the legs 11 by passing them at regular intervals in the width direction on two legs 11 having plate pieces 11b fixed to both ends of a pipe material 11a. (see FIGS. 6 and 7), each plate piece 11b is connected to the cover 9b.
is fixed to the inner surface of

An upper raw material supply trough 13 as shown in FIGS. 1 to 3 is connected to the outlet end 8a of the upper trough 8.

The upper raw material supply trough 13 has a tip portion located directly above the middle portion of the wood chip removal screen IO, has an inclined surface that becomes lower toward the tip on one side in the width direction, and has a length dimension to the tip. , has a tip shape that becomes shorter on the side where the tip becomes lower.

Table 1 shows the angle of inclination a in the width direction of the slope, the length on the side where the tip is lowered is b1, and the length on the opposite side is C.

Table 1 Note that, as shown in FIG. 5, a sieve portion 14 is provided at the intermediate portion of each of the lower trough 7 and the upper trough 8, and a fine particle removal trough 15 provided below each sieve portion 14 is provided. It penetrates the side wall 1b of the cylindrical container 1 and protrudes outward, so that the fine particles sorted by the sieve part 14 are discharged to the outside of the cylindrical container 1 via the fine particle removal trough 15. .

The operation of the raw material quantitative feeder A configured as above will be explained.

When the vibration generator 6 is energized, the cylindrical container 1 starts vibrating.

When the cylindrical container 1 is replenished with raw materials such as leaf tobacco backbones, the backbones subjected to vibration are brought to the inner peripheral surface of the side wall 1b by the dispensing white plate 16, and the spiral surfaces of the lower trough 7 and the upper trough 8 gradually rises along the outlet ends 7a and 8.
a, the backbones sent out from the outlet end 7a fall onto the wood chip removal screen 10, and the backbones are sieved onto the raw material supply trough 9 by the vibrating wood chip removal screen 10, and then passed to the delivery end of the raw material supply trough 9. sent towards.

Large impurities such as wood chips mixed in the backbone remain on the wood chip removal screen 10 and move to the delivery end of the wood chip removal screen 10.

On the other hand, the backbones sent out from the outlet end 8a fall from the tip of the upper raw material supply trough 13 to the middle part of the wood chip removal screen 1O, but the sieving of the backbones has already been completed in the middle part of the wood chip removal screen 1O. Therefore, it is not disturbed by the backbone sent out from the outlet end 7a (similar sieving is performed).

In addition, the backbone moving toward the tip on the upper raw material supply trough 13 tends to be biased to one side in the width direction of the upper raw material supply trough 13, but the side where there are fewer backbones becomes lower toward the tip and the backbone moves toward the tip. Since the length up to the upper raw material supply trough 13 is shorter, the backbone that is about to advance toward the inner peripheral surface of the upper raw material supply trough 13 moves lower, and the backbone that falls from the tip of the upper raw material supply trough 13 is removed by wood chips. The sieving capacity of the wood chip removal screen 10 is further improved because the wood chips are supplied falling almost evenly in the width direction of the wood chip removal screen 10.

The backbones sieved off at the middle part of the wood chip removal screen 10 merge with the previously screened backbones, and are transferred from the delivery end of the vibrating raw material supply trough 9 to the next process conveyor (
(not shown), and large impurities are discharged from the delivery end of the wood chip removal screen 10.

〔Effect of the invention〕

Since the present invention is configured as described above, raw materials such as backbones supplied from the outlet end of the lower trough and raw materials such as backbones supplied from the outlet end of the upper trough are respectively screened for wood chip removal. Since the material is supplied to three separate locations, the capacity of the screen for removing wood chips is doubled, and the upper raw material supply trough has an inclined surface, so that the length to the tip is lowered at the tip. In the case of a short tip shape, the raw material supplied from the upper raw material supply trough is uniformized in the width direction of the wood chip removal screen, further increasing the sieving capacity.

By increasing the sieving capacity of this wood chip removal screen, the problem of insufficient sieving capacity that occurred with conventional raw material quantitative feeders has been resolved.

[Brief explanation of the drawing]

Figures 1 to 7 show examples of the present invention, with Figure 1 being a plan view of the raw material supply trough and the upper raw material supply trough, Figure 2 being a side view of the same as above, and Figure 3 being the X of Figure 1. Arrow view, Figure 4 is a front view of the raw material quantitative feeder, Figure 5 is a plan view of the raw material quantitative feeder, Figure 6 is a plan view of the wood chip removal screen, and Figure 7 is the front view of the wood chip removal screen. It is a diagram. A... Raw material quantitative feeder, 1... Cylindrical container, la.
...bottom wall, 1b...side wall, 2...vibration table, 5...
Spring, 6... Vibration generator, 7... Lower trough, 7
a... Outlet end, 8... Upper trough, 8a... Outlet end, 9... Raw material supply trough, 10... Wood chip removal screen, 13... Upper raw material supply trough.

Claims (2)

[Claims] (1) A cylindrical container having a cylindrical side wall erected around the periphery of the bottom wall, a lower trough extending spirally along the inner surface of the side wall and having an outlet end above the side wall, and an upper part of the lower trough. an upper trough extending spirally and having an upper outlet end above the outlet end, a pedestal on which the cylindrical container is mounted via a spring, and a vibration generator attached to the bottom wall of the cylindrical container. In the raw material quantitative feeder, a screen for removing wood chips is provided at the outlet end of the lower trough, and a raw material supply trough is provided below the screen for removing wood chips, and the tip is disposed at the outlet end of the upper trough for removing the wood chips. A raw material quantitative feeder characterized by having an upper raw material supply trough located directly above the middle part of a screen for use in the production of raw materials. (2) The upper raw material supply trough has an inclined surface on one side in the width direction that becomes lower toward the tip, and has a tip shape in which the length dimension to the tip becomes shorter on the side where the tip becomes lower. The raw material quantitative feeder according to claim 1, characterized by: