JPH083391Y2 - Granule carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a granular material conveying device for quantitatively cutting and conveying granular material such as foundry sand.

(Prior Art) Generally, in a reclamation processing line for foundry sand, a vibrating conveyor as shown in Japanese Utility Model Laid-Open No. 59-77534 is used to convey foundry sand. Also. A conveying device as shown in FIGS. 4 and 5 is known as a device for quantitatively cutting and conveying foundry sand. This carrier is a hopper 1.
A transport trough 2 is disposed adjacent to the lower side of the transport trough 2, and the transport trough 2 is supported by a plurality of rollers 3 so as to be horizontally movable back and forth. It is designed to be performed via the mechanism 5. In such a transport device, the casting sand A that has flowed down from the hopper 1 is transported in the forward direction of the transport trough 2 as the transport trough 2 moves back and forth, and when the transport trough 2 moves forward, it is cut out and carried out by a fixed amount.

(Problems to be Solved by the Invention) However, in the above-described conventional transfer device, as shown in FIG. 5, a gap is provided so that the hopper opening 1a on the retracting side of the transfer trough does not interfere with the transfer trough 2. Since it is installed, it flows out from this gap to the rear end side of the transfer trough, and this outflowing sand flows under the pressure difference (opening part) directly below the hopper opening part 1a.
The pressure acting on the sand directly below 1a is high), so it cannot be infiltrated again, and it accumulates on the rear end side of the transfer trough in sequence,
If the amount of this accumulation increases, the opening portion will be formed when the transport trough 2 advances.
There was a problem that the sand accumulated in 1a was pushed to the backward side of the transport trough and overflowed and leaked from the transport trough 2.

The present invention has been made in view of the above-mentioned problems of the related art, and an object thereof is to provide a granular material conveying device capable of preventing leakage of particles from a conveying trough with a simple configuration.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention is a conveying device which is arranged below a hopper for accommodating granules and adjoins it, and which moves back and forth in a substantially horizontal direction by a driving means. In a granular material conveying device that quantitatively cuts and conveys granular material by a trough, a rear wall of the opening of the hopper is provided with a bottom wall portion which is inclined upward toward the advancing side of the conveying trough while keeping a distance from the conveying trough on the retreating side of the conveying trough. An oscillating scraping plate is provided which is provided with a pressure relief member having a triangular cross-sectional shape, and on the retracting side of the transport trough of the pressure relief member, collects the particles on the transport trough and pushes them below the pressure relief member only when the transport trough retracts. Is provided in the hopper, and a stopper for restricting the swing of the swing type scraping plate when the transport trough is retracted is provided in the hopper.

(Operation) According to the above configuration, when the transport trough advances,
There is a space below the pressure relaxation member, and the pressure existing due to the weight of the particles in the hopper does not act on the particles existing below the pressure relaxation member, and the particles are collected by the scraping plate when the transport trough retracts. Since the particles are easily pushed under the pressure relief member, a large amount of particles are prevented from flowing out and accumulating at the backward end of the transfer trough, and overflow of the particles from the transfer trough is prevented.

(Effect of the Invention) Therefore, according to the granular material conveying device of the present invention, the pressure relaxation member is arranged at the opening of the hopper, and the rocking type scraping plate for pushing the particles is provided below the pressure relaxation member, and With a simple structure in which a stopper that regulates the swing of the scraping plate is provided, it is possible to reliably prevent the particles from leaking from the transport trough.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a vertical sectional view showing the whole of the granular material conveying device, FIG. 2 is a longitudinal sectional view showing an essential part of a state where the conveying trough is advanced, and FIG.
The figure shows a longitudinal cross-sectional view of a main part showing a state in which the transport trough is retracted.

First, in FIG. 1, 10 is a hopper attached to the frame 11. Inside the hopper 10, foundry sand A as particles is accommodated. Reference numeral 12 denotes a transfer trough that is arranged in a substantially horizontal direction adjacent to the lower part of the opening 10a of the hopper 10,
The take-off trough 12 is supported by a plurality of front and rear rollers 13 mounted on the frame 11 so as to be horizontally movable, and is substantially horizontally moved by a crank mechanism 14 and a drive motor 15 as drive means arranged between the rollers 13. Forward (direction of arrow a),
It moves backward (in the direction of arrow b).

Reference numeral 17 denotes a pressure relief member disposed on the retracting side of the transfer trough in the opening 10a of the hopper 10, and the pressure relief member
Reference numeral 17 denotes a bottom wall portion 17a which is formed in an upward slope in a direction of an arrow a while maintaining a distance from the transport trough 12, an inclined portion 17b which guides the flow of the molding sand A to the opening 10a, and an outer wall of the hopper 10. Part 1
0b and has a substantially triangular cross section.

Reference numeral 18 denotes a scraping plate which is disposed on the retreating side of the pressure relief member 17 toward the conveying trough and has an upper end swingably attached to the hopper outer wall portion 10b. The scraping plate 18 is an outer wall portion in the direction of arrow a.
It can swing until it hits 10b, and its swinging is restricted in the direction of arrow b by a stopper 19 fixed to the outer wall portion 10b of the hopper to keep it substantially drooping, and the lower end portion is a transfer trough.
It will be in the state closest to 12.

In the figure, 20 is a guide wall for the molding sand A provided in the lower part of the hopper 10, and 21 is a predetermined height for carrying out the molding sand A carried out from the forward end of the transport trough 12. It is a carry-out height adjusting device.

Next, the operation of the granular material conveying device of this embodiment will be described with reference to FIGS. 1 to 3.

The foundry sand A in the hopper 10 is transferred from the opening 10a to the transfer trough 1
2 Run down. When the transport trough 12 is moved back and forth by the crank mechanism 14, the casting sand A is sequentially transported in the direction of arrow a at the time of forward movement, and is cut out from the forward end of the trough 12 by a fixed amount.

During the transportation as described above, the foundry sand tends to flow out from the gap between the pressure relief member 17 and the transportation trough 12 toward the rear end portion 12a of the transportation trough 12.

However, as shown in FIG. 2, when the transport trough 12 advances toward the forward side, the casting sand A is formed by the upwardly sloping bottom wall portion 17a.
Is space 22 and also the angle of repose θ relationship formation, the sand A ₁ present in the lower bottom wall portion 17, so that the pressure due to the weight of molding sand A in the hopper 10 does not act.

Next, in the above state, as shown in FIG.
When 12 moves backward, swinging of the scraping plate 18 is restricted by the stopper 19, and the sand A ₂ scraped up by the scraping plate 18 is easily pushed under the bottom wall 17a having a low pressure.

Even if the above-described operation is repeated, as the transport trough 12 is repeatedly moved forward and backward, as shown in FIGS. 2 and 3,
It is considered that a certain amount of sand A ₃ is deposited on the rear end portion 12a of the transfer trough.

However, even if a certain amount is accumulated as described above, the transfer trough
At the time of advancing 12, the scraping plate 18 easily swings in the trough advancing direction, so that the scraping plate 18 does not press the accumulated sand A ₃ toward the rear end side of the transport trough, and the forward and backward movements of the transport trough 12 cause the above-mentioned movement. Since the above operation is repeated, it is possible to prevent further accumulation of sand on the rear end side of the transfer trough, and it is possible to prevent overflow of sand from the rear end portion 12a of the transfer trough.

In addition, 23 is a plate provided in consideration of sand leakage prevention,
This does not necessarily have to be provided.

As described above, according to this embodiment, the pressure relief member 17,
Since the swinging scraping plate 18 and the stopper 19 are provided and they are configured to be associated with the forward and backward movements of the transport trough 12, a simple structure can be obtained, which is excellent in practicality and durability for preventing sand leakage. It can be a granular material conveying device.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view of a granular material conveying device showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of an essential portion showing a forward state of the conveying trough in FIG. 1, and FIG. 3 is FIG. 4 is a vertical cross-sectional view of an essential part showing the retracted state of the transfer trough in FIG. 4, FIG. 4 is an overall vertical cross-sectional view showing a conventional particle transfer device, and FIG. 5 is a vertical cross-sectional view of the main part on the rear end side of the transfer trough in FIG. It is a figure. 10 ... Hopper, 12 ... Transport trough, 14 ... Crank mechanism, 17 ... Pressure relief member, 17a ... Bottom wall part, 18 ... Oscillating scraping plate, 19 ... Stopper.

Claims (1)

[Scope of utility model registration request] 1. A granule transporting device for quantitatively cutting and transporting granules by a transport trough which is arranged below a hopper for accommodating the granules and adjoins and which is moved back and forth in a substantially horizontal direction by a driving means. On the retreating side of the transfer trough in the opening, there is provided a pressure easing member having a substantially triangular cross section having a bottom wall portion which is inclined upward toward the advance side of the transfer trough while keeping a distance from the transfer trough, and the transfer trough of the pressure easing member. On the retreat side, the hopper is provided with a swingable scraping plate that scrapes the particles on the transport trough and pushes them below the pressure relief member only when the transport trough is retracted. A granular material conveying device having a hopper provided with a stopper for restricting rocking.