JPH027832Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a hopper device used, for example, in a soil digging machine for seedling boxes.

<Prior Art> As shown in FIG. 4, a conventional hopper device 15' for an earth-penetration machine has a pair of upwardly expanding inclined surfaces A and B above the dropping opening 19 for guiding the descent of the soil. The pair of inclined surfaces A and B have the same lowermost positions a and b, and are formed symmetrically.

<Problem to be solved by the invention> If the lowest positions a and b of the slopes A and B that guide the soil downward are at the same height, the pressure of the soil stored above them is: Forces F and F' are formed along the slopes A and B, respectively, and gather at the center point P, and since the forces F and F' are approximately the same, they are balanced. Therefore, a bridging phenomenon of soil may occur near the center point P, and the flow of soil may become poor, making it impossible to dump the soil.

<Means for solving the problem> The problem with such conventional technology is that the slopes A and B
This is solved by making the heights of F and F' different so that the forces F and F' are not balanced at the center point P.

That is, the specific configuration of the problem solving means of the present invention is as follows:
A guide section 18 that is arranged on the belt conveyor 16 and has inclined surfaces A and B that are inclined downward toward the center in the front and rear directions of the conveyor movement direction, and a drop opening that extends downward from the lower end of the front and rear guide section 18. Part 19
In the hopper device for an earth-filling machine, which has a shutter 21 at the front dumping port for setting the soil supply amount between the belt conveyor 16 and the front dumping port 1,
The force point BP of the pressure F of the earth flow due to the front slope B at the center of 9 is the pressure of the earth flow due to the rear slope A.
It is characterized by the fact that the front inclined surface B is placed one step lower than the rear inclined surface A so that it is located below the force point AP of F'.

<Function> The pressure F of the soil flowing along the slope B of the front guide section with respect to the pressure F of the soil sliding down the slope B is:
The force point BP at the center of the front and rear drop openings is located lower than the pressure F' of the force flowing along the slope A of the rear guide part, blocks the pressure F' applied to the shutter 21 side, and passes below the shutter 21. Belt conveyor 16
It reduces the earth pressure applied to the soil above and makes both pressures F and F' unbalanced.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In Figures 1 to 3, reference numeral 1 denotes a soil digging machine that can be incorporated into a seedling seeding seeding device, and is mounted on a support frame 3 formed by arranging a pair of front and rear U-shaped members 2 facing each other. The seedling box transfer mechanism 4 is supported by the seedling box transport mechanism 3 .

The seedling box transfer mechanism 4 is provided with a pair of rollers 6 on rotating shafts 5 arranged at approximately equal intervals on a support frame 3, and a chain 8 wound around a sprocket 7 provided at the end of each rotating shaft 5. By transmitting power from a motor (not shown), the seedling box 9 placed on the rollers 6 can be transported. Although this seedling box transfer mechanism 4 is a roller conveyor, it may also be a belt conveyor.

The earth-entering machine 1 has a pair of left and right guide plates 13, 1 on the inner upper part of a pair of front and rear side plates 12 fixed on a support frame 3.
4 to form a hopper device 15, and a belt conveyor 16 is disposed below the hopper device 15.

The hopper device 15 is made up of three upper and lower sections, including a storage section 17 at the top, a guide section 18 at the middle, and a drop-in opening section 19 at the bottom. Inclined surfaces A and B are formed on the inner surface. The lowest positions a and b of both inclined surfaces A and B are shifted vertically, and the lowest position a is higher than the lowest position b by a height H. That is,
Both inclined surfaces A and B are located at the front and back in the moving direction of the belt conveyor 16 and are inclined downward toward the center thereof, and the front inclined surface B is arranged one step lower than the rear inclined surface A.

Also, the angles α and β of the slopes A and B may be the same, but if they are different, the magnitudes of the soil falling forces F and F' will be different, and the balance between the forces F and F' at the center will be disrupted. , the occurrence of bridging can be further prevented. In this example, the inclination angle α is 60° and the inclination angle β
is set at 45°, making the slope A higher and steeper.

However, the extension line of the slope surface A and the extension line of the slope surface B do not intersect at the center P of the front and rear drop opening portions 19, and the extension line of the slope surface B is located lower.

Therefore, the force point BP of the pressure F of the earth flow due to the front slope B at the center P is lower than the force point AP of the earth flow pressure F' due to the rear slope A, resulting in an imbalance, and the pressure F is lower than the pressure F ', and the pressure F' applied to the shutter 21, which will be described later, is reduced.

Although the inclined surface A of the hopper device 15 is formed on the guide plate 13 itself, it can also be formed from a separate member as shown in FIG. That is, the hopper device 15' is the same as the conventional one, and the left and right guide plates 13 and 14 have a symmetrical shape.
An auxiliary guide plate 20 is detachably attached to the auxiliary guide plate 20. The auxiliary guide plate 20 has a hook part 20a at the upper end, and a contact part 2 that faces the storage part 17 of the guide plate 13.
0b, inclined part 20 located above the guide part 18
c, a supplementary part 20d which is arranged on the drop opening part 19 and is flush with it, and an inclined surface A is formed in the inclined part 20c, the lowest position a of which is located on the guide plate 1.
It is set at a position H higher than the lowest position b of the inclined surface B of No. 3. By this auxiliary guide plate 20, the guide plate 1
On the third side, the falling force F' of the soil is higher than on the guide plate 14 side, and is no longer balanced at the center point P.

A shutter 21 is provided in front of the drop opening 19 of the guide plate 14, and a rack 22 formed on the shutter 21 meshes with a pair of front and rear pinions 23, and rotates a shaft 24 that supports the pinions 23. By moving it, the gap with the belt conveyor 16 can be adjusted, and the amount of soil supplied can be adjusted.

FIG. 4 shows the state of soil flow inside the hopper device 15, and the soil at a pressure F (indicated by the solid line arrow in FIG. 4) flowing along the front inclined surface B of the front guide section of the guide section 18 is as follows. Soil at pressure F' flowing along the rear inclined surface A of the rear guide section (indicated by the dashed-dotted arrow in Figure 4).
At the center P of the front and rear drop-in ports 19, the soil at pressure F enters below the soil at pressure F' and blocks the flow. When each piece of soil passes through slopes A and B, it generates a downward flow, but the pressures F' and F are generally directed toward the center P, and the pressure F' is directed toward the shutter 21, but in the opposite direction. The pressure acting on the shutter 21 is blocked by the pressure F compared to when the slopes A and B are at the same height.
The influence of F′ becomes smaller.

The belt conveyor 16 has a belt 28 wound between rollers 26 and 27 rotatably supported by the side plate 12, and power is transmitted to one of the rollers 27 from the rotating shaft 5 of the transfer mechanism 4 via a winding transmission means 29. ing. Incidentally, it is preferable that the belt conveyor 16 or the winding transmission means 29 be provided with an electromagnetic clutch for operating the clutch after detecting that the seedling box 9 is carried into the soil-entering machine 1.

Reference numeral 31 denotes an auxiliary feed mechanism, in which a pair of rollers 33 are provided on a rotating shaft 32, and both ends of this rotating shaft 32 are inserted into inverted triangular holes 34 formed in the side plate 12, allowing free rotation and vertical movement. is supported by
The rotating shaft 32 and rollers 33 are the same as the rotating shaft 5 and rollers 6 of the transfer mechanism 4.

The lower surface side of the belt conveyor 16 and the transfer mechanism 4
The distance T between the upper surface of the upper seedling growing box 9 is set to be slightly smaller than the diameter of the roller 33, and the roller 33 can contact the belt 28 between the rollers 26 and 27, and the upper surface of the seedling growing box 9. It is possible.

Therefore, the rollers 33 come into contact with the seedling box 9 carried into the soil-entering machine 1 and are pushed up, pushing the belt 28
This causes tension in the belt 28, and as a result, the movement of the belt 28 causes the roller 3 to
3 is rotated and driven so as to press the seedling raising box 9 from above.

Reference numeral 37 denotes a soil guiding device, which includes a first reflecting plate (chute) 38 supported by the side plate 12 and a second reflecting plate 39 supported by a mounting portion 40 fixed to or integrally formed with the side plate 12.

The first reflecting plate 38 is formed of a flat plate, and both ends thereof are attached to the side plate 12 so as to be rotatable and vertically adjustable. It is reflected slightly in the same direction as the transport direction A.

The second reflecting plate 39 is an angle member with a square cross section, and its both ends are attached so that it can be rotated and its vertical position adjusted freely. The soil is reflected in the direction B opposite to the transport direction A, and the second surface 39b guides the soil other than the large particles reflected by the first reflecting plate 38 so as to suppress the reflection.

By means of the first and second reflectors 38 and 39, the seedling raising box 9 is supplied with large grain soil in the lower layer and medium and small grain soil in the upper layer. Soil will be added.

Reference numeral 42 denotes a soil leveling device disposed in front of the soil insertion machine 1, which smooths the top surface of the bed soil supplied into the seedling growing box 9. This leveling device supports a rotating shaft 44 on the upper part of a frame 43 whose lower end is pivotally supported on the support frame 3, and a brush 45 is attached to this rotating shaft 44. Power can be transmitted from the rotating shaft 5 of the transfer mechanism 4 via the rotating shaft 5 of the transfer mechanism 4. Reference numeral 47 denotes a height adjustment screw screwed into the frame 43, the lower end of which can come into contact with the upper surface of the member 2 having a U-shaped cross section, and can freely intervene between it and the height adjustment screw 47 on the upper surface of the member 2. A retraction member 48 is rotatably provided with a bolt 49, and the earth leveling device 42
When the brush 4 is not operated, the retracting member 48
Lift 5 upwards.

<Effects of the invention> According to the invention described in detail above, the front slope B is made one step lower than the rear slope A which generates the pressure F' of soil flow toward the shutter 21 side, and the front and rear dropping openings 19 Since the force point BP of the pressure F of the soil flow due to the front slope B at the center P of is located lower than the force point AP of the pressure F' due to the rear slope A, the pressure F' of the soil flowing on the rear slope A By blocking the front slope B with flowing soil,
It is possible to reduce the amount of soil reaching the shutter 21, prevent soil from being pressed between the shutter 21 and the belt conveyor 16, and prevent the soil from clogging. Since the pressures F and F' of the upper and lower earth flows are unbalanced, the occurrence of bridging can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional front view showing another embodiment of the invention, and Fig. 4 is a hopper. FIG. 5 is an explanatory cross-sectional diagram showing the state of soil flow inside the device, and FIG. 5 is an explanatory diagram showing the conventional device. 1... Soil entry machine, 4... Seedling box transfer mechanism, 9...
Seedling raising box, 13, 14... guide board, 15... hopper device, 16... belt conveyor, 17... storage section, 18... guide section, 19... drop opening section, 21...
...Shutter, 37...Soil guide device, A, B...Slope, a, b...Lowest position, H...Height, F...
Earth falling force, α, β... angle.

Claims (1)

[Claims for Utility Model Registration] A guide section 18 that is disposed on the belt conveyor 16 and has inclined surfaces A and B that are inclined downward toward the center in the front and rear directions of the conveyor movement direction, and from the lower end of this front and rear guide section 18. Drop opening section 1 extending downward
9, and is provided with a shutter 21 for setting the amount of soil supplied between the belt conveyor 16 and the front dropping opening, the front inclined surface B at the center of the front and rear dropping openings 19; The force point BP of the soil flow pressure F due to the back slope A
A hopper device for an earth-entering machine, characterized in that a front inclined surface B is arranged one step lower than a rear inclined surface A so as to be located lower than the point of force AP of the pressure F' of soil flow.