JP2007314186A - Grain storing tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grain storing tank having a shutter opening/closing structure which is improved so as to be capable of uniformly and evenly feeding and conveying a stored grain in the tank to the outside of the tank. <P>SOLUTION: A screw conveyor 3 is arranged in a longitudinal feed passage 2 formed at a lowest part of a storing tank, and a pressure bearing plate 8 is arranged at an upper part of the screw conveyor 3. Flow-down ports on both sides for flowing down the stored grain to the screw conveyor 3 are formed between the pressure bearing plate 8 and both hopper bottoms of the tank. Shutters 7 for opening and closing both the flow-down ports are arranged in an opening/closing structure in a variably elevating manner from the feed starting end side to the feed terminating end side so that openings of both flow-down ports become narrower from the feed starting end side of the feed passage 2 toward its feed terminating end side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a grain storage tank that temporarily stores grains (grains) such as rice and wheat harvested from a field by a combine etc. in a tank and transports the grains to a rice center etc. mounted on a truck or the like. In particular, the present invention relates to a shutter opening / closing structure for opening and closing a flow-down port through which stored grain in the tank flows down to a screw conveyor disposed at the bottom of the tank.

Conventionally known grain storage tanks (also referred to as Glen tanks) are provided with a screw conveyor at the bottom of the tank having a substantially hopper-shaped longitudinal section.
In addition, the grain storage tank is provided with pressure receiving plates for reducing the weight load of the stored grains on the screw conveyor at the upper part of the screw conveyor, so that both side edges of the pressure receiving plate and both sides of the tank The hopper bottom is formed with a flow-down port for flowing the stored grain down to the screw conveyor, and a shutter for opening and closing the flow-down port on both sides is arranged to be movable up and down. (For example, refer to Patent Document 1).
Utility Model Registration No. 3002224 (see paragraph numbers 0015 and 0016 and FIGS. 4 and 6)

However, the shutter of the conventional grain storage tank is incorporated and supported so as to rise in parallel (horizontal) over the entire length from the conveyor start end side to the conveyor end end side of the screw conveyor.
In other words, the shutter is arranged to be movable up and down so as to open and close the flow outlets on both sides formed between the side edges of the pressure receiving plate at the upper part of the screw conveyor and the hopper bottoms on both sides of the tank. In the opening / closing structure, the downflow ports on both sides are opened at the same opening in the front-rear direction by rising in parallel in the entire length in the front-rear direction from the conveyor start end side to the conveyor end end side.

Therefore, in the conventional grain storage tank, when the stored grain is discharged by rotation of the screw conveyor and discharged out of the tank from the discharge port part on the conveyor terminal part side, the tank stored on the conveyor terminal part side The stored grains in the tank quickly flow down to the screw conveyor, and are efficiently sent out of the tank and discharged by the screw conveyor, but the stored grains in the tank stored on the conveyor start end side are the end of the conveyor The flow down to the screw conveyor is slow compared to the section side, and the flow down is small.
This is because the stored grain on the conveyor end near the discharge port to the outside of the tank is preferentially sent out and discharged out of the tank, so the flow of stored grain to the screw conveyor has priority on the conveyor end. On the other hand, on the conveyor start end side, the flow is slow and the flow is small. Therefore, even though all the stored grain on the end side of the conveyor is sent out and discharged, there is a deviation phenomenon in the sending and discharging by the screw conveyor that the stored grain remains at the start end side of the conveyor. Currently.

As shown in FIGS. 1 and 2, the cereal storage tank is provided with a cocoon residual sensor (pressure sensor) 14 at the bottom of the hopper near the screw conveyor on the conveyor terminal side. The rotation of the screw conveyor is automatically stopped at the time when the residual sensor 14 is set OFF or several minutes after that.
For this reason, all the stored grain on the conveyor end side is sent out and discharged out of the tank, and the stored grain disappears from the residue sensor so that the rotation of the screw conveyor stops, so the flow to the screw conveyor is reduced. Slowly, the stored grain on the conveyor start end side with a small amount of delivery discharge is completely sent out and left without being discharged.
As a solution to prevent this deviation phenomenon, it is conceivable to install a soot residue sensor on the start side of the conveyor as well as on the end side of the conveyor. The priority will be given to the delivery and discharge of stored grains, which is not the best solution.

  Accordingly, the inventors of the present application have conducted various experiments in order to solve the above-mentioned problems, and as a result, the rise of the shutter disposed over the entire length from the conveyor start end side to the conveyor end end side of the screw conveyor. Paying attention to the fact that the opening of the flow-down opening due to the large opening as it reaches from the conveyor end part side to the conveyor start end side can prevent the offset phenomenon at the time of sending and unloading the stored grains, The purpose of the project was improved so that the stored grains in the tank can be sent and transported out of the tank evenly, regardless of the storage location of the grains in the tank. Another object of the present invention is to provide a grain storage tank having a shutter opening / closing structure.

In order to solve the above-mentioned problem, in claim 1, a screw conveyor in the front-rear direction is disposed at the bottom of the tank that is long in the front-rear direction and is substantially rectangular in plan view and has a vertical cross-section of a substantially hopper shape.
In addition, a pressure receiving plate for reducing the load of stored grains on the screw conveyor is disposed above the screw conveyor, and the screw is interposed between the pressure receiving plate and the hopper bottoms on both sides of the tank. In the grain storage tank which is provided with a flow outlet on both sides for flowing down the stored grain to the conveyor, and further configured to freely move up and down a shutter for opening and closing the flow outlet on both sides, The shutter is configured to be lifted so that the opening of the flow outlet on both sides accompanying the lift of the shutter becomes narrower from the conveyor start end side to the conveyor end end side of the screw conveyor. Features.

According to the configuration of the first aspect, when the stored grains in the tank are sent out of the tank and discharged, the flow outlets on both sides between the pressure receiving plate in the upper part of the screw conveyor and the hopper bottoms on both sides of the tank When the shutter is closed, the flow-down openings on both sides are opened so that the opening becomes narrower from the conveyor starting end side to the conveyor terminal end side of the screw conveyor.
As a result, the stored grain in the tank stored on the conveyor start end side of the screw conveyor flows down to the screw conveyor more than the stored grain stored in the tank stored on the conveyor end side, and is transferred by the screw conveyor. It is sent out of the tank and discharged.
Therefore, unlike the conventional case, the amount of stored grain in the tank stored on the conveyor start end side is smaller than that on the conveyor end side, and all the stored grain on the conveyor end side is sent out and discharged. In spite of this, the offset phenomenon that occurred in the delivery and discharge by the screw conveyor, where the stored grain is completely sent out and remains without being discharged at the conveyor start end side, is eliminated.

  And, if the stored grain on the conveyor start end side is preceded by the delivery and discharge of stored grain on the conveyor end side, even if all the stored grain on the conveyor start end side is sent and discharged, As long as the stored grain remains on the end of the conveyor, the screw conveyor continues to rotate without stopping, so that all the stored grain on the end of the conveyor is sent out and discharged.

According to a second aspect of the present invention, the shutter has a rising amount when opening the downstream outlets on both sides by the front and rear link mechanisms respectively provided on the conveyor start end side and the conveyor end end side of the screw conveyor. It is supported so that it may be changed in the part side and the conveyor terminal part side.
The front / rear link mechanism includes a first link whose one end is fixed to a rotary shaft that is mounted from the conveyor starting end side to the conveyor terminal end side of the screw conveyor, and the other of the first link. A second link that is pivotally attached to one end side and pivotally attached to the shutter side on the other end side, and is configured to include at least the length of the first link on the conveyor terminal end side, The length of the first link on the conveyor start end side is formed short (Claim 3).

According to the structure of Claim 2 and Claim 3, the raising amount of a shutter is varied so that the opening of the downflow opening of both sides becomes narrow as it goes from the conveyor start part side of a screw conveyor to the conveyor terminal part side. By adopting a link mechanism as a shutter support mechanism for this purpose, it is possible to easily implement a shutter opening / closing structure that varies the amount of shutter lift on the conveyor start end side and the conveyor end end side of the screw conveyor.
That is, the conveyor end portion from the conveyor start end side of the screw conveyor by a simple method such as changing the length of at least one of the first link and the second link constituting the front and rear link mechanisms. The amount of increase of the shutter for narrowing the opening of the flow-down port as it reaches the side can be changed.

  Since the grain storage tank of the present invention is configured as described above, all the stored grain on the conveyor terminal end side of the screw conveyor disposed in the front-rear direction is sent and discharged at the bottom of the tank. Regardless, the stored grain in the tank can be removed to the outside of the tank by the screw conveyor, without causing a shift phenomenon when the stored grain is sent and discharged, such as the stored grain remaining on the conveyor start end side. Can be sent out and carried out.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a longitudinal side view showing an embodiment of a grain storage tank according to the present invention, and FIG. 2 is a longitudinal front view thereof.

≪Construction of grain storage tank≫
As shown in FIG. 1, the grain storage tank A includes a delivery path 2 extending in the front-rear direction at the bottom of the storage tank 1 having a substantially hopper-shaped longitudinal section, and the groove direction of the delivery path 2 The screw conveyor 3 is disposed in a rotationally bridged manner over the entire length, and a discharge port portion 4 is provided on the delivery terminal side of the delivery path 2.

  A motor 6 is installed at the bottom of the machine frame 5 that is configured to support the storage tank 1. The screw conveyor 3 is driven and rotated by the power from the motor 6 and is sent out by the rotational power. The stored grain M in the tank that has flowed down into the drainage path 2 is transported through the delivery path 2 by the rotation of the screw conveyor 3 and is delivered to the delivery port portion 4 on the delivery end side. It is configured to be discharged out of the tank by a carry-out hose 17 connected to the section 4.

≪Storage tank configuration≫
As shown in FIGS. 1 and 2, the storage tank 1 is long in the front-rear direction and opened in a substantially rectangular shape in plan view. The front and rear short side walls 1-1 are vertical walls, and the left and right long side walls 1-2 are The upper half side in the height direction is a vertical wall, and the lower half side is a tapered hopper bottom 1a that is gradually inclined toward the bottom.
As a result, the stored grain M stored in the storage tank 1 naturally moves down toward the delivery path 2 by raising the shutter 7 described later, and flows into the delivery path 2.

≪Configuration of delivery path≫
As shown in FIGS. 1 and 2, the delivery path 2 has a length extending in the front-rear direction of the storage tank 1 and is formed in a substantially bowl shape, and bolts or the like are provided at the lower ends of the left and right hopper bottoms 1 a of the storage tank 1. It is installed at the bottom of the tank by means of stop means.
As shown in FIGS. 1 and 2, a discharge port portion 4 is provided on the discharge end side of the discharge path 2, and the rear short side rear wall 1-1 of the rear side of the tank from the discharge port portion 4. The screw conveyor 3 is attached to the delivery path 2 so as to be rotationally bridged over the delivery start end side of the delivery path 2, so that the screw conveyor 3 is arranged in the delivery path 2.
Further, as shown in FIGS. 1 and 2, a pressure receiving plate 8 is disposed at an upper portion of the delivery path 2, and the self-load of the stored grain M in the tank is delivered by the pressure receiving plate 8. The screw conveyor 3 is not directly applied to the screw conveyor 3 in the path 2 so that the screw conveyor 3 can rotate without receiving a large load.

  Incidentally, as shown in FIG. 1 and FIG. 2, the discharge port portion 4 has a gutter drop port 4a that is opened at the groove bottom of the delivery path 2, and a neck portion that is positioned directly below the gutter drop port 4a. A connecting portion 4b provided so as to be swingable, and connected to the connecting portion 4b is a connection port 17b of the unloading hose 17 that houses the coil conveyor 17a. The stored grain M delivered to the delivery terminal side is transferred through the carry-out hose 17 by the coil conveyor 17a and carried out of the tank.

≪Configuration of pressure receiving plate≫
As shown in FIGS. 1 and 2, the pressure receiving plate 8 is formed to have a length extending between the front and rear short side walls 1-1 and 1-1 of the storage tank 1. The pressure receiving plate 8 has a closed upper half (top) side that has a substantially chevron shape and a lower half that is expanded in a downward opening shape in a substantially reverse U-shape. By being fixed to the side wall 1-1 by a fastening means such as a bolt, the bridge is disposed between the front and rear short side walls 1-1 at the upper portion of the screw conveyor 3 in a bridging manner.
As shown in FIG. 2, the storage grain M is sent out between the both side drooping edge portions 8a of the pressure receiving plate 8 and the hopper bottom portions 1a on both sides by arranging the pressure receiving plate 8 in this manner. Downflow ports 9 for flowing down to the path 2 are formed respectively.

Then, by arranging the shutters 7 for opening and closing the flow outlets 9 on both sides to be movable up and down, the stored grain M is prevented from flowing down to the delivery path 2 during transportation to a rice center or the like. I am doing so.
Here, the opening and closing of the downflow openings 9 on both sides by the shutter 7 does not directly open and close the downflow openings 9 as shown in FIG. 2 and FIGS. 4 and 5 to be described later. The storage grain M in the tank that has passed through the flow outlet 9 is prevented from flowing down to the delivery path 2 on the inner side (the delivery path 2 side), and the storage grain M that has passed through the flow outlet 9 is This means that it flows down to the delivery path 2.

≪Shutter configuration≫
FIG. 3 is a longitudinal side view of a main part showing an enlarged state where the shutter is raised. 4 is an enlarged vertical sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is an enlarged vertical sectional view taken along line VV in FIG.
As shown in FIGS. 1 to 5, the shutter 7 has a length extending from the sending start end side to the sending end side of the sending path 2, and the upper and lower surfaces are opened higher than the opening heights of the downflow ports 9 on both sides. It is formed in a long box shape that is long in the front-rear direction. Further, the shutter 7 has a lower end side of the front and rear surface walls 7a, 7b cut out into a substantially semicircular shape so that it does not interfere with the screw conveyor 3 in the lowered state in which the flow-down port 9 is closed.

As shown in FIGS. 1 and 3, the shutter 7 is arranged so as to be movable up and down by supporting the front and rear wall surfaces 7a and 7b by the front and rear link mechanisms 10 and 11, respectively. .
Thus, the shutter 7 is lowered to its lower limit on the hopper bottom 1a of the tank, so that the flow-through ports 9 on both sides are closed and the closed state so that the stored grain M in the tank does not flow down to the delivery path 2. 4 and FIG. 5, the shutter 7 is raised in the direction of the pressure receiving plate 8 so that the flow-down ports 9 on both sides are appropriately opened and the stored grain M is appropriately flowed down to the delivery path 2. It can be made to flow down in quantity.

≪Configuration of front and rear link mechanism≫
As shown in FIG. 3, the front and rear link mechanisms 10 and 11 are pivotally mounted between the front and rear short side walls 1-1 of the storage tank 1 at a position above the shutter 7 in the pressure receiving plate 8. The first link 10a, 11a, one end of which is fixed to the rotating shaft 12 by welding or the like, and the other end of the first link 10a, 11a are pivotally attached to the other end of the first link 10a, 11a. Second links 10b and 11b pivotably attached to front and rear wall surfaces 7a and 7b of the shutter 7 are provided.

As shown in FIGS. 3, 4 and 5, the first link 10 a of the front link mechanism 10 fixed to the rotary shaft 12 on the delivery terminal end side of the delivery path 2 is a delivery start end portion. On the side, the length L1 is formed to be shorter than the length L2 of the first link 11a of the rear link mechanism 11 fixed to the rotary shaft 12.
On the other hand, the second link 10b of the link mechanism 10 is formed with a length L3 longer than the length L4 of the second link 11b of the link mechanism 11.

Thus, the lengths L1 and L3 of the first link 10a and the second link 10 of the front link mechanism 10 and the lengths of the first link 11a and the second link 11b of the rear link mechanism 11 are as follows. By changing L2 and L4, as shown in FIG. 2, the shutter 7 descending so as to close the downflow ports 9 on both sides is directed toward the pressure receiving plate 8 as shown in FIGS. By raising, the flow-down ports 9 on both sides closed by the shutter 7 are opened so that the opening becomes narrower from the delivery start end side of the delivery path 2 to the delivery end side.
That is, when the rotary shaft 12 is rotated counterclockwise (counterclockwise) from the lowered state of the shutter 7 shown in FIG. The first link 10a and the rear first link 11a have different semicircular movement distances from the second links 10b and 11b to the pivots P1 and P2.
As a result, the ascending amount of the shutter 7 that is lifted so as to be lifted by the front and rear link mechanisms 10, 11 with the rotation of the rotating shaft 12 is higher than the sending end portion side of the sending path 2. As shown in FIG. 3, the downstream outlets 9 on both sides have a wide opening width L5 on the delivery start end side of the delivery path 2, and the delivery start end portion, as shown in FIG. 3. It opens so that opening width L6 may become narrow as it goes to the delivery terminal part side provided with a discharge port part from the side (refer FIG.4 and FIG.5).

≪Mechanism configuration of shutter up / down movement≫
FIG. 6 is a partial perspective view of the grain storage tank as viewed from the front.
As shown in FIG. 6, the vertical movement of the shutter 7 (counterclockwise rotation of the rotating shaft 12, clockwise rotation) is attached to the protruding end portion of the rotating shaft 12 protruding outward from the front short side wall 1-1 of the storage tank 1. Thus, the operation handle 13 provided outside the short side wall 1-1 is configured to be rotated (clockwise rotation, clockwise rotation of the rotary shaft 12).
As shown in FIG. 6, the operation handle 13 is appropriately fixed to a bracket 14 attached to the front short side wall 1-1 a of the storage tank 1 by a stop knob 15. In other words, the openings of the flow outlets 9 on both sides by raising the shutter 7 can be changed as appropriate so that the amount of flow of the stored grain M to the delivery path 2 can be adjusted as appropriate.

According to the grain storage tank A according to the present embodiment configured as described above, when the stored grain M in the storage tank 1 is sent out of the tank and discharged, as shown in FIGS. As shown in FIG. 3, when the shutter 7 that closes the flow-down openings 9 between the pressure receiving plate 8 and the hopper bottoms 1a on both sides of the tank is raised by rotating the operation handle 13, the screw conveyor 3 is arranged. The opening width L5 is wide on the delivery start end side of the delivery path 2 to be installed, and the opening width L6 becomes narrower from the delivery start end side to the delivery terminal end side including the discharge port portion 4. The downflow ports 9 on both sides are opened (see FIGS. 4 and 5).
Thereby, the storage grain M in the tank stored on the delivery start end side of the delivery path 2 is more than the storage grain M in the tank stored on the delivery end side. Is discharged to the outside of the tank by the screw conveyor 3 (see FIGS. 4 and 5).

  Then, temporarily, the delivery and discharge of the stored grain M on the delivery start end side of the delivery path 2 precedes the delivery and discharge of the storage grain M on the delivery end side of the delivery path 2 and the delivery start end. Even if the delivery and discharge of the stored grain M on the part side is completed before the delivery end part side, as long as the stored grain M remains on the delivery end part side, that is, as shown in FIGS. In addition, the screw conveyor 3 is rotated by the motor 6 without stopping unless the residue sensor 16 provided in the hopper bottom 1a near the screw conveyor 3 is set OFF at the delivery terminal end side of the delivery path 2. By continuing, all the stored grain M on the sending end side is sent out of the tank and discharged.

In addition, by adopting the front and rear link mechanisms 10 and 11 as the support mechanism of the shutter 7 for changing the rising amount of the shutter 7 on the sending start end side and the sending end end side of the sending path 2, The support mechanism of the shutter 7 that varies the amount of ascending the shutter 7 on the sending start end side and the sending end end side can be implemented with a simple structure.
That is, it can be implemented by a simple method such as changing the lengths of the first links 10a and 11a and the second links 10b and 11b constituting the front and rear link mechanisms 10 and 11, respectively.

The specific configuration of the embodiment of the present invention is not limited to the above-described embodiment, and there are design changes and the like without departing from the gist of the present invention described in claims 1 to 3. Are also included in the present invention.
For example, as a technique for varying the amount of lift of the shutter 7 on the sending start end side and sending end portion side of the sending path 2, the first links 10a, Without changing the length of 11a and the length of the second links 10b and 11b as in the above-described embodiment, the lengths of the first links 10a and 11a are the same, and the second link The lengths 10b and 11b are formed to the same length.
Then, the other end of the second link 10b of the front link mechanism 10 pivotally attached to the front wall 7a of the shutter 7 is provided with a long hole in its length direction, or is replaced with the second link 10b. Then, by another method such as providing a long hole in the height direction on the front wall 7 a side of the shutter 7, from the sending start end side of the sending path 2 to the sending end portion side including the discharge port portion 4. An opening / closing structure in which the amount of lift of the shutter can be varied so that the opening becomes narrower as it reaches the end.

It is a vertical side view which shows embodiment of the grain storage tank which concerns on this invention. It is the II-II longitudinal cross-sectional view of FIG. It is the vertical side view which shows the state which raised the shutter. FIG. 4 is an enlarged vertical sectional view taken along line IV-IV in FIG. 3. FIG. 5 is an enlarged vertical sectional view taken along line VV in FIG. 3. It is the fragmentary perspective view which looked at the grain storage tank from the front.

Explanation of symbols

A Grain storage tank 1 Storage tank 1a Hopper bottom 2 Delivery path 3 Screw conveyor 4 Discharge port 7 Shutter 8 Pressure receiving plate 10, 11 Link mechanism 10a, 11a First link 10b, 11b Second link M Storage grain

Claims (3)

A screw conveyor in the front-rear direction is disposed at the bottom of the tank that is long in the front-rear direction and has a substantially hopper-shaped longitudinal section,
In addition, a pressure receiving plate for reducing the weight load of the stored cereals on the screw conveyor is disposed in an upper portion of the screw conveyor, and the pressure receiving plate and the hopper bottoms on both sides of the tank, Each has a flow outlet on both sides for flowing the stored grain down to the screw conveyor,
Furthermore, in the grain storage tank that is configured by vertically disposing a shutter for opening and closing the flow outlets on both sides,
The shutter is configured to be lifted so that the opening of the flow outlet on both sides accompanying the lift of the shutter becomes narrower from the conveyor start end side to the conveyor end end side of the screw conveyor. Features a grain storage tank.   The shutter has a front and rear link mechanism provided on the conveyor start end side and the conveyor end portion side of the screw conveyor, respectively, so that the amount of rise when opening the flow-down ports on both sides is increased between the conveyor start end side and the conveyor end The grain storage tank according to claim 1, wherein the grain storage tank is supported so as to be variable at a portion side. The front / rear link mechanism includes a first link whose one end is fixed to a rotary shaft that is mounted from the conveyor start end side to the conveyor end end side of the screw conveyor, and the other end side of the first link. Each having a second link pivotally attached to one end side and pivotally attached to the shutter side on the other end side,
The grain storage according to claim 2, wherein the length of the first link on the conveyor start end side is shorter than the length of the first link on the conveyor end portion side. tank.

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