JPH1081419A - Accumulate conveyer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform positioning of cargo safely and easily. SOLUTION: A conveyer belt 4 in a conveyer division can switch a conveying direction of cargo 6 in forward or reverse by an invertor motor. The conveying distance of the cargo 6 by the conveyer division can be detected by a rotation number detection unit. Several positioning devices 13 are provided at fixed intervals along a conveying direction of the conveyer division in space of the conveyer belt 4. A stopper in the positioning device 13 is forced to protrude upward from the conveyer surface of the conveyer division and it is retracted downward from the conveyer surface by weight of the cargo 6 when the cargo 6 is conveyed in a forward direction, and it is engaged to the cargo 6 to stop the cargo 6 for positioning when the cargo 6 is conveyed in a reverse direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an accumulate rate conveyor device. More specifically, the present invention relates to an accumulating conveyor device capable of feeding a conveyed object at a predetermined interval at a fixed interval and accurately stopping the conveyed object.

[0002]

2. Description of the Related Art In a conventional fixed-size feeder, a transfer pallet is fixed on a transfer belt.
A manufactured product, a processed product, and the like are placed on the transport pallet and transported at a fixed distance. For this reason, if an obstacle is present during the transport of the transport pallet, the transport pallet and the products thereon may be destroyed. In addition, when the transport pallet or the product on the transport pallet is heavy, if a person happens to be in the transport path, a large impact is given to the person, and there is a problem in terms of safety.

As another conventional example, a conveyed object such as a conveyer pallet placed on a conveyer belt of an accumulate conveyor is conveyed by a fixed distance and sent in a fixed size, for example, projected from below onto a convey surface. In some cases, a stopper is brought into contact with a front end surface of a conveyed object to position the conveyed object at a predetermined position. However, such an accumulating conveyor device requires a drive system for raising and lowering the stopper from the transport surface, and also requires a control device for controlling the timing for raising and lowering the stopper. For this reason, the mechanical structure and the electrical configuration are complicated, and it is unsuitable for applications that do not require high-precision positioning of a conveyed object.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has as its object to provide a safe and easy positioning of a conveyed object. It is to provide an accumulation rate conveyor device.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided an accumulate rate conveyor device, comprising: a conveyor section capable of switching a conveying direction of a conveyed article in a reverse direction; a means for detecting a conveying distance of the conveyed article by the conveyor section; And a plurality of stoppers disposed at predetermined positions along the transport direction of the conveyor unit, wherein the stopper is urged to protrude above the transport surface of the conveyor unit, and the transported object is transported in the forward direction. When the transport object is conveyed in the opposite direction, it is locked to the transport object when the transport object is transported in the opposite direction.

[0006]

According to the present invention, there is provided a means for detecting the transport distance of the conveyed object by the conveyor unit. Therefore, the conveyor unit conveys the conveyed object while detecting the conveyed distance by the conveyor distance detecting means. The conveyed article can be sent in the forward direction until it exceeds the position of the next stopper. In addition, when the transported object passes above the stopper, the stopper is retracted below the transport surface due to the interaction with the transported object, for example, the weight of the transported object, so that a driving system for driving the stopper, a control circuit therefor, and the like. Is not required.

[0007] Further, after the conveyed article is sent by the conveyor section until it exceeds the next stopper, if the conveying direction of the conveyer section is switched to the opposite direction, the conveyed article slightly returned backward is locked by the stopper and accurately positioned. Is done. Also at this time, since the stopper is urged to protrude above the transport surface, a drive system for driving the stopper and a control circuit therefor are not required.

[0008]

1 (a) and 1 (b) are a plan view and a sectional view showing an accumulator 1 according to an embodiment of the present invention. Reference numeral 2 denotes a frame of the accumulate conveyor device 1, and rollers 3 are rotatably supported on the carry-in end and the carry-out end of the left and right inner surfaces of the frame 2, respectively. Belt 4
Is being wrapped around. Therefore, the conveyor belts 4 are disposed on both sides of the accumulate conveyor device 1 to form the conveyor sections 5, and a space is opened between the conveyor belts 4. Thus, a conveyed object 6 such as a conveyer pallet on which a manufactured product, a processed product, or the like is mounted is mounted on the conveyer belt 4 on both sides and conveyed in the conveying direction.

Below the conveyor belt 4, a drive unit 7 containing an inverter motor 9 capable of normal and reverse rotation and a rotation speed detection unit 11 for detecting the rotation speed of the inverter motor 9 is installed. Sprocket 9 attached to the output shaft of inverter motor 9 serving as an output unit
A chain 10 is looped between the roller and a sprocket (not shown) integrally connected to the roller 3 of the conveyor unit 5.

Reference numeral 12 denotes a control unit. The control unit 12 detects the transport distance of the transported object 6 by the transport belt 4 or the position of the transported object 6 based on the output signal of the rotation speed detecting unit 11, and accordingly, the inverter motor 8 By controlling the inverter motor 8 to switch to forward rotation, reverse rotation, and stop, thereby switching to forward conveyance, reverse conveyance, and conveyance stop. In addition, the control unit 12 switches and controls the transport speed of the conveyor unit 5 such as low-speed start, high-speed intermediate transport, and low-speed stop.

In the space between the conveyor belts 4, a pair of positioning devices 13 are disposed at regular intervals along the transport direction, that is, at constant feed distances of the transported objects 6. ing. In the positioning device 13, the stopper 1
The stopper 4 is rotatably supported by a rotating shaft 14 a, and is urged so that the distal end surface of the stopper 14 protrudes above the conveying surface of the conveyor unit 5. Stopper 1
As the urging means 15 of 4, a spring, air, gas,
Any material having elasticity such as a cushion material may be used. For example, FIGS. 2A and 2B show a coil spring as the urging means 15. Further, the stopper 14 stops at a predetermined position when rotating upward.

Therefore, the stopper 1 of the positioning device 13
4, as shown in FIG. 2A, when the transported object 6 passes above the stopper 14, the stopper 14 is pressed by the weight of the transported object 6 and naturally retracts below the transport surface. When the transported object 6 has passed, the stopper 14 is made to protrude above the transport surface by the urging means 15.
When the conveyor unit 5 rotates in the reverse direction and conveys the conveyed object 6 in the reverse direction, the rear end face of the conveyed object 6 abuts against the tip of the stopper 14 and stops, and the positioning is stopped at the stopper position.

Next, the operation of the accumulator 1 will be described with reference to FIGS. 3 (a) and 3 (b) to 6 (a) and 6 (b). Here, each (a) of FIGS. 3 to 6 is a partially broken plan view, and each (b) is a partially broken cross-sectional view.
Now, as shown in FIGS. 3A and 3B, it is assumed that the rear end surface of the conveyed object 6 is positioned at the stopper position by contacting the rear stopper 14. From this state, the conveyor belt 4
Is moved in the forward direction to move the transported object 6 in the forward direction.
The transported object 6 moves while pushing the front stopper 14 downward and retracting below the transport surface. At this time, the conveyance distance of the conveyed object 6 is detected by the rotation number detecting unit 11, and when the conveyed object 6 is conveyed to a position beyond the position of the next stopper 14, the conveying belt 4 stops. Therefore, the transported object 6 stops at a position where its rear end surface is slightly too far beyond the position of the front stopper 14. Then, the conveyor belt 4
Is rotated in the reverse direction to move the transported object 6 in the reverse direction, the rear end surface of the transported object 6 abuts against the tip of the stopper 14, and the transported object 6
Is accurately positioned at a predetermined position and is accurately forwarded by a certain distance. Note that the interval between the conveyed articles fed by the fixed size can be freely adjusted by changing the set value of the rotation speed detecting unit 11 and the position of the stopper 14.

After the conveyed article 6 is brought into contact with the stopper 14 and positioned, the conveyor section 5 stops. Therefore, when the work is performed on the conveyed object 6, since the conveyor unit 5 is stopped, no noise or vibration is generated, and the workability is improved. Also, no human body damage due to noise or vibration occurs. Further, unlike the conventional sizing feeder, the conveyed object is not forcibly conveyed by fixing the conveyed object, so that even if there is an obstacle in the middle of the conveyance, the conveyed object slips on the conveyor unit 5. Only, safety is ensured.

Therefore, according to the accumulation rate conveyor apparatus 1 of the present invention, the transported object 6 can be easily transported by the conveyor unit 5 while the transport distance of the transported object 6 is measured by the rotation speed detecting unit 11. 6 can be sent to a predetermined position. Then, the transported object 6 can be positioned only by rotating the transport belt 4 in the reverse direction and bringing the transported object 6 into contact with the stopper 14, and by accurately positioning the transported object 6 by the stopper 14 each time the transported object 6 is moved, accurate positioning is achieved. Dimension feed can be realized. In addition, since there is no need for a drive system or a control circuit for causing the stopper 14 to protrude or retract from the transport surface, the transported object 6 can be accurately and precisely fed by a simple structure.

FIGS. 7 (a) and 7 (b) are a plan view and a sectional view showing a positioning device 13 of an accumulate conveyor device according to still another embodiment of the present invention. The stopper 14 provided in the positioning device 13 has a wedge-shaped portion 21 formed at the tip, and the wedge-shaped portion 21 of the stopper 14 is also provided on the rear end surface of the conveyed object 6 such as a conveyance pallet.
A V-groove-shaped recess 22 is formed in accordance with the above. The stopper 14 is urged by a spring 23 in a direction protruding from the conveyance surface, and is regulated by a contact portion 24 so as not to rotate upward by a certain angle or more. Then
When the transported object 6 is transported in the reverse direction, the tip of the stopper 14 fits into the concave portion 22 of the transported object 6 to position the transported object 6. At this time, simultaneously, the center of the stopper 14 and the center of the concave portion 22 are forcibly aligned by the wedge-shaped portion 21 of the stopper 14 being fitted into the concave portion 22, and the position of the conveyed article 6 in the left-right direction is simultaneously performed.

FIG. 8 is a plan view showing a positioning device 13 of the accumulator 1 according to still another embodiment of the present invention. The stopper 14 provided in the positioning device 13 is formed in a pencil shape, and a through hole 26 through which the pencil-shaped stopper 14 can be inserted is formed in the rear end surface of the transported object 6 such as a transport pallet. . Thus, when the transported object 6 is transported in the reverse direction,
The pencil type stopper 14 is inserted into the through hole 26 of the transported object 6, and at this time, the transported object 6 is positioned in the front-rear direction and the left-right direction.

In each of the above embodiments, the conveyor 5
Although the case where a belt conveyor is used has been described, a conveyor unit having another structure may be used. FIG. 9 shows an accumulate rate conveyor device 3 according to still another embodiment of the present invention.
1 is a plan view showing a roller conveyor device 5 as a conveyor unit 5. That is, in the accumulation rate conveyor device 31, a plurality of transport rollers 32 are provided along the transport direction.
Is supported by a rotating shaft 33 and can be switched between forward rotation, reverse rotation, and stop by the inverter motor 8. A positioning device 13 having a stopper 14 is provided in a space formed by removing a part of these transport rollers 32.

[0019]

According to the accumulator of the present invention, the conveyed article can be fed by a fixed length by the conveyer section, and the conveyed article is slightly returned in the reverse direction to be locked by the stopper, thereby conveying the conveyed article. Can be accurately positioned.

In addition, there is no need for a drive system or a control circuit for driving the stopper, and the stopper naturally retracts when the article passes over the stopper, and automatically stops when the article has passed. Project from the transport surface, the mechanical structure and electrical configuration of the accumulate conveyor can be simplified. Therefore, it is possible to easily realize an accumulation rate conveyor device capable of accurately feeding a conveyed object by a fixed size.

Further, since it is not necessary to fix the conveyed object to the conveyor, there is no danger of the conveyed object being damaged even if there is an obstacle in the conveyed path of the conveyed object. Performance is reduced.

[Brief description of the drawings]

1 (a) and 1 (b) are a plan view and a schematic sectional view showing an accumulate rate conveyor device according to an embodiment of the present invention.

FIGS. 2A and 2B are explanatory views showing the operation of a stopper used in the accumulator of the accumulator according to the first embodiment.

FIGS. 3 (a) and 3 (b) are a plan view and a cross-sectional view showing a state where a conveyed object is positioned in the accumulate conveyor device of the above.

FIGS. 4A and 4B are a plan view and a cross-sectional view showing a state in which a conveyed object passes above a stopper.

FIGS. 5A and 5B are a plan view and a cross-sectional view illustrating a state in which a conveyed object has passed a position of a stopper.

FIGS. 6A and 6B are a plan view and a cross-sectional view illustrating a state in which a conveyed object is conveyed in a reverse direction and positioned by a stopper.

FIGS. 7A and 7B are a plan view and a cross-sectional view showing a structure of a positioning device of an accumulate rate conveyor device according to another embodiment of the present invention.

FIG. 8 is a cross-sectional view illustrating a structure of a positioning device of an accumulate conveyor device according to still another embodiment of the present invention.

FIG. 9 is a plan view showing an accumulate rate conveyor device according to still another embodiment of the present invention.

[Explanation of symbols]

 4 Conveyor belt 5 Conveyor 6 Conveyed object 7 Drive unit 8 Inverter motor 11 Rotational speed detection unit 12 Control unit 13 Positioning device 14 Stopper

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B65G 47/28 B65G 47/28 EF

Claims (1)

[Claims] 1. A conveyor unit capable of switching a transport direction of a transported object in a reverse direction, a unit for detecting a transport distance of the transported object by the conveyor unit, and a conveyor unit disposed at a predetermined position along the transport direction of the conveyor unit. A plurality of stoppers, the stopper is urged to protrude above the conveying surface of the conveyor unit, and when the conveyed object is conveyed in the forward direction, the conveyer is interacted with the conveyed object. An accumulate conveyor device wherein the conveyor is retracted below the surface and is locked to the conveyed object when the conveyed object is conveyed in the opposite direction.