JPH07232814A - Conveyor - Google Patents

Abstract

PURPOSE:To provide a structure capable of carrying entangled workpieces while separating them without having any effect such as damage, etc., on the workpieces. CONSTITUTION:A conveyor is provided with multiple rollers 1 each of which are provided with disk pieces 2a which become thinner gradually in the outer peripheral direction from a center where a through-hole is formed and in which multiple disk pieces 2a are arranged in series on a shaft 3 by inserting a shaft 3 into the through hole with a frictional force for power transmission provided between the disk pieces and the internal surface of the through hole and a drive meas which is provided with a motor 7 to give a rotational force to the shafts 3 in the same direction. Then the phases of the disk pieces 2a of the multiple rollers 1 are shifted by half top between the adjacent rollers 1, and the disk pieces 2a are inserted into them each other so as to form a flat transport surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a conveyor suitable for transporting a work which has a non-uniform shape and is easily entangled.

[0002]

[Prior Art] Today, the labor shortage in agriculture becomes serious,
Automation is being called for with the aim of improving productivity and reducing labor. Among them, automatic selection, inspection, and boxing work when shipping produced agricultural products are relatively easy to automate, so some of them have already been adopted. A problem with this automation is that, for example, agricultural products such as kidney beans (hereinafter, these agricultural products and the like are collectively referred to as "workpieces") do not have a uniform shape, and are therefore easily entangled with each other on the conveyor.
Further, in the case of being entangled, a method such as applying a swirling brush or the like to forcibly release it is adopted.

[0003]

However, in the method of forcibly breaking the work entwined on the conveyor by applying a swirling brush or the like, when the work is a soft one, There is a problem in that a large load is applied and damage is caused to reduce the product value. For this reason, since it is not possible to apply too much force from the outside, it is not possible to solve it sufficiently, and it is sent to the final position in the entangled state, and there is a problem that it interferes with sorting and inspection work. there were.

The present invention has been made in view of the above problems, and an object thereof is to provide a structure in which entangled works can be conveyed while being separated without adversely affecting the works. To provide a conveyor. Other purposes will be clarified one after another in the contents described below.

[0005]

According to the present invention, there is provided a disk-shaped top having a thickness gradually decreasing from the center where a through hole is formed to the outer peripheral direction. A plurality of rollers each having a shaft inserted into the through hole of the top with a frictional force for power transmission interposed between the shaft and the inner surface of the through hole, and a plurality of the rollers mounted side by side on the shaft; A driving means for applying a rotational force in the same direction to each of the shafts is provided, the phases of the plurality of rollers are shifted by half a frame between adjacent rollers, and the respective frames are interleaved with each other. This is achieved by forming a flat transport surface. A second cylindrical top having a smaller outer diameter than the outer diameter of the top and having a through-hole at the center into which the shaft is inserted is formed in a parallel tube shape on the shaft of the roller. Alternatively, a configuration may be employed in which an opening is provided in the portion of the transport surface on which the second top is provided. Further, a stop means for contacting a specific piece of the plurality of pieces to temporarily stop the specific piece may be provided, or the shaft of each roller may be provided with a power transmission belt. It may be configured to be connected to the same drive source via the same.

Further, in the present invention, the object is a disk-shaped first top that gradually decreases in thickness from the center where the through hole is formed to the outer peripheral direction,
Similarly, a through-hole is provided in the center and a second tubular member is formed in a parallel cylindrical shape with an outer diameter smaller than that of the first frame.
And a shaft is inserted into the through holes of the first and second frames by interposing a frictional force for power transmission between the shaft and the inner surface of the through hole. A plurality of rollers arranged side by side on top of each other, a drive means for applying a rotational force in the same direction to each of the shafts, and a specific top of the plurality of tops are brought into contact with the particular top. And a stop means for temporarily stopping the plurality of rollers, while shifting the phase of each of the plurality of rollers by half a frame between adjacent rollers, and let each of the frames enter each other to form a flat transport surface. This is achieved by using a structure formed by forming. Further, the driving means may be provided with a motor, and the rotation of the motor may be transmitted to the pulleys fixed to the respective shafts via a belt, or the stopping means may be moved forward and backward. Alternatively, the piston rod may be protruded until it comes into contact with the top to stop the top.

[0007]

According to this structure, the disc-shaped rollers of the rollers which are driven by the driving means such as the motor are arranged in parallel to the flow direction of the work, and the respective frames have an acute angle. Since it has edges, workpieces that are randomly placed on the conveyor are dropped at the edge of each frame into a roughly V-shaped valley formed between each frame and are automatically separated, but a large load is applied. It is transported without this. Also, since the shaft and the top are not directly fixed but power is connected via friction, if an excessive load is applied between the work and the top, the shaft and the top will slip. Since the rotation of the top with respect to the work is stopped, it is possible to prevent the work from being further loaded.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 3 show a main part of a conveyor according to an embodiment of the present invention. FIG. 1 is a top view thereof, FIG. 2 is a side view thereof, and FIG. 3 is a cross section taken along line AA of FIG. It is a figure.

In FIGS. 1 to 3, reference numeral 1 is a plurality of rollers which are regularly arranged on the conveying surface of the conveyor and laid in a flush manner. Here, five rollers 1A, 1 are provided.
B, 1C, 1D, 1E are shown. Each roller 1
They have substantially the same structure, and are roughly composed of a top 2a, an auxiliary top 2b, and a shaft 3.

The top 2a has a through hole 4 formed at the center, and the thickness gradually decreases so that both sides face inward as it goes from the center toward the outer circumference. It is formed in a disk shape with sharp edges. On the other hand, the auxiliary piece 2b is formed in a shape corresponding to exactly half of the vertically divided two pieces of the piece 2a from the middle of the left and right, and the same through hole 4 as that of the piece 2a is formed at the center. Are formed.

The shaft 3 is rotatably attached to each side frame 5A, 5B via a bearing 11 so as to straddle the side frames 5A, 5B provided in parallel to the left and right of the conveyor. The shaft 3 has a side frame 5A,
Before being attached to 5B, a plurality (7 in this embodiment)
The top 2a and one auxiliary top 2b are attached in advance to be unitized as the roller 1, and are attached in this state. When the tops 2a and 2b are attached to the shaft 3, they are attached by inserting the shaft 3 into the through holes 4 of the respective tops 2a and 2b. In the attached state, the inner surface of the through hole 4 and the shaft 3 are attached. The frictional force is interposed between the tops 2a and 2b and the tops 2a and 2b and the shaft 3 rotate integrally while the tops 2a and 2b do not receive a load equal to or greater than a predetermined value. The slides are assembled between the tops 2a and 2b and the shaft 3 so that the rotation of the tops 2a and 2b can be stopped. Here, as a method of interposing a frictional force between the inner surface of the through hole 4 and the shaft 3, the frame 2
The a and 2b are made of, for example, rubber to give friction to the shaft 3, and the sleeves made of rubber are attached to the through holes 4 of the tops 2a and 2b to give friction. .

Then, each roller 1 is connected to the side frame 5
In the case of attachment to A and 5B, as shown in FIG. 1, the phases of the tops 2a are shifted by half a space between the adjacent rollers 1, and the tops 2a are arranged so as to be inserted between each other. Then, in this case, the auxiliary pieces 2b are alternately positioned on different end portions. When the rollers 1 are sequentially attached in this manner, the tops 2a,
2b is laid, and the flat conveying surface, that is, the tops 2a and 2b of each roller 1 are arranged parallel to the flow direction of the conveyor, and the tops of the tops 2a and 2b
The conveyance surface is formed with the sharp edge of b protruding. The size between the edges of the tops 2a and 2b is preferably set so that the valley formed by the edges allows only one work 13 (see FIG. 4) to fall into the valley. Also, in this way, the side frames 5A, 5
A pulley 6 is integrally rotatably attached to the end of the shaft 3 of each roller 1 attached to B.

Reference numeral 7 is a motor as a driving means. A pulley 8 is integrally rotatably attached to the output shaft 7a of the motor 7. Reference numeral 9 is an endless belt that power-connects between the pulley 8 and the pulley 6 of each roller 1,
A half-turn twist is provided between the pulleys 6. When the motor 7 is driven, the rotation of the output shaft 7a can be transmitted to each roller 1 via the pulley 8, the endless belt 9, and the pulley 6.

Reference numeral 10 is an air cylinder as a stopping means installed on the lower side of the conveying surface, which has a piston rod 10a which is moved forward and backward by sending compressed air. In this embodiment, the air cylinder 10 is
It is not provided for all the rollers 1, but is provided only for the top 2a of the roller 1 selected in advance. When the piston rod 10a is projected, the top 2a corresponding to this is provided. The structure is such that a collision occurs and a load is applied to the colliding top 2a to forcibly stop the rotation. The movement of the piston rod 10a in each of the air cylinders 10 is controlled by the controller 12 on the basis of information from a monitoring means (not shown) that monitors the work transfer state on the transfer surface of the conveyor. Is.

Next, the operation of this conveyor will be described. In this conveyor, when the motor 7 is driven, this rotation is transmitted to the shaft 3 of each roller 1 via the pulley 8, the endless belt 9, and the pulley 6, and the shafts 3 are simultaneously rotated in the same direction. In addition, the rotation of the shafts 3 causes the tops 2 on each shaft 3
The frictional force causes a and 2b to rotate integrally with each shaft 3.

In this state, like kidney beans,
The long and narrow workpieces 13 (see FIG. 4) having irregular shapes are collectively placed on the transport surface. Then, the work 13 is sent in the rotation direction by the rotation of the tops 2a and 2b. Further, when fed in this way, the slender workpieces 13 each form an acute-angled edge parallel to the flow direction, as shown in FIG.
It is dropped in the valley between two pieces 2a, and is sent while being separated one by one here.

When a large number of works 13 overlap with each other and a large load is generated between the top 2a and the work 13, the top 2a and the shaft 3 slip and the top 2 moves.
The rotation of a is stopped. Then, the overlapping upper work 13 is sent first, and when the overlapping is removed and the load is reduced, the stopped top 2a rotates again with the shaft 3, and thus the lower work 13 also continues. I will be sent.

Further, when the conveyance amount of the work 13 is not averaged based on the information from the monitoring means (not shown) which monitors the state of conveyance of the work on the conveyance surface of the conveyor, adjustment is required. Air cylinder in part 1
0 is driven to cause the piston rod 10a to project, the rotation of the top 2a is temporarily stopped, and the work 13 is retained. Further, after the adjustment, the piston rod 10a is retracted again to allow the stopped top 2a to rotate. As a result, the amount of the work 13 sent on the conveyor can be adjusted and averaged.

FIG. 5 shows a modification of the conveyor according to the present invention. 5 that are the same as those in FIGS. 1 to 3 are the same as those in FIGS. 1 to 3. In the modified example shown in FIG. 5, the conveyor 1 shown in FIGS. 1 to 3 has a roller 1 provided with a disk-shaped piece 2a having the same outer diameter (however, the piece 2b has a semi-disk shape). The second is used in part while it is used
The frame 2c is used. This second piece 2
c has a through hole (not shown) through which the shaft 3 can pass, and has an outer diameter smaller than the outer diameter of the top 2a by about one third, and is formed in a parallel cylindrical shape.

Therefore, in this conveyor structure,
At the portion where the second top 2c is provided, the opening 14 is formed on the transport surface. The opening 14 is formed so as to be larger than the thickness of the work 13, and the outer diameter of the second top 2c is set so as to satisfy this condition. Then, when the tip of the work 13 enters the opening 14 when the work 13 passes through the portion where the opening 14 is formed, the work 13 having the tip penetrates through the opening 14 to the outside of the conveyor. By doing so, the amount of the work 13 that is about to be transported can be adjusted, and the amount of the work 13 that is fed on the transport surface can be adjusted. In addition,
Also in the conveyor of this modified example, as in the conveyor shown in FIGS. 1 to 3, an air cylinder as a stop means is provided below the conveying surface, and the piston rod of this air cylinder is brought into contact with the top 2a. It is also possible to have a structure in which the feed amount of the work 13 is adjusted by stopping. Further, in the above embodiment, the work 13 is described as the case of agricultural products such as kidney beans, but it is not limited to agricultural products and can be widely used as a conveyor for separating and transporting general products one by one.

[0021]

As described above, according to the conveyor of the present invention, the disc-shaped roller tops driven by the driving means such as the motor are parallel to the flow direction of the work. In addition, since each top has an acute-angled edge, a workpiece placed randomly on the conveyor is dropped at the edge of each top into a V-shaped valley formed between the tops. While being automatically separated, they are transported without a heavy load. Also,
Since the shaft and the top are not directly fixed but are connected by power through friction, if an excessive load is applied between the work and the top, the shaft and the top will slip and Since the rotation of the tops is stopped, it is possible to expect an effect that it is possible to prevent the work from being further loaded.

[Brief description of drawings]

FIG. 1 is a top view of a main part of a conveyor shown as an embodiment of the present invention.

FIG. 2 is a side view of an essential part of the conveyor shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an operation explanatory view of the above conveyor shown in FIG. 1.

FIG. 5 is a main part top view showing a modified example of the conveyor according to the present invention.

[Explanation of symbols]

 1 roller 2a top (first top) 2b auxiliary top 2c top (second top) 3 shaft 4 through hole 7 motor (driving means) 10 air cylinder (stopping means) 10a piston rod 13 work 14 opening

Claims (7)

[Claims] 1. A friction piece for power transmission between the inner surface of the through hole and a disk-shaped top that gradually decreases in thickness from the center where the through hole is formed toward the outer peripheral direction. A plurality of rollers each having a shaft inserted into the through-hole of the top with a force interposed therebetween and a plurality of the tops arranged side by side on the shaft, and driving means for applying a rotational force in the same direction to each of the shafts. A plurality of rollers are provided, and the phases of the frames are shifted by half frames between adjacent rollers, and the frames are inserted into each other to form a planar conveyance surface. Conveyor to do. 2. A second cylinder formed on the shaft of the roller in a parallel cylindrical shape having an outer diameter smaller than that of the top and having a through hole at the center into which the shaft is inserted. The conveyor according to claim 1, wherein a top is provided, and an opening is provided at a portion of the transport surface on which the second top is provided. 3. The conveyor according to claim 1, further comprising a stop unit that is brought into contact with a specific frame among the plurality of frames and temporarily stops the specific frame. 4. The shaft of each of the rollers is connected to the same drive source via a power transmission belt.
The conveyor according to any one of 1. 5. A disk-shaped first piece that gradually decreases in thickness from the center where the through hole is formed toward the outer periphery, and the through hole is also provided at the center and the first hole is formed. A second top formed in parallel with an outer diameter smaller than that of the first top, and a friction force for power transmission is interposed between the second top and the inner surface of the through hole. Second
A plurality of rollers each having a shaft inserted into the through hole of each frame and having a plurality of the frames arranged side by side on the shaft; drive means for applying a rotational force in the same direction to each of the shafts; And a stop means for temporarily stopping the particular frame by abutting it on a particular frame among the plurality of frames. A conveyor, characterized in that the conveyors are formed by moving the tops of the tops of one another while shifting the tops of the tops. 6. The conveyor according to claim 5, wherein the driving means has a motor, and the rotation of the motor is transmitted to a pulley fixed to each shaft via a belt. 7. The stop means is formed by a cylinder having a piston rod capable of advancing and retreating, and the piston rod is projected until it comes into contact with the top to apply a load to stop the top. The conveyor according to item 5.