JP2002154626A - Roller conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller conveyor having a simple and low cost structure, using a small drive source merely, and capable of preventing an article from being worn out because the rotation of a roller below the article stops when stopping the article forcedly. SOLUTION: Many rollers 1a are arranged in a row, a drive shaft 2 extending in the direction of conveyance below the rollers 1a is arranged, a pulley 3 is mounted through the drive shaft 2 at a predetermined pitch, and an inside diameter of a shaft hole of the pulley 3 is set to be larger than an outside diameter of the drive shaft 2 by about 0.25 mm to transmit power of the pulley 3 and the rollers 1a above it by a transmission belt 4. The pulley 3 and the drive shaft 2 transmit power by a friction force, but, if a large load for preventing the rotation of the rollers 1a acts, the contact between the pulley 3 and the drive shaft 2 slides to prevent the transmission of power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller conveyor for transporting articles on rollers, which transports the articles on the rollers and holds the articles on the rollers in a forcibly stopped state by a stopper, a gripping device or the like. The present invention relates to a roller conveyor device that can perform both mechanically and reasonably, and an article storage facility using the same.

[0002]

2. Description of the Related Art Conventional roller conveyors include a free roller conveyor comprising only rotatable free rollers without forcibly driving rollers, and a drive roller conveyor for forcibly rotating each roller using a driving source such as a motor. There are two types. The former free roller conveyor is often used so that the roller conveyor is inclined and moved by its own weight of the articles to be conveyed. However, in the case where the article is conveyed and the article is forcibly stopped at the end of the roller conveyance path or in the middle thereof, the free roller conveyor has a low starting speed when the conveyance of the forcibly stopped article is started. . Also, if a large starting speed is generated by increasing the inclination angle, the impact force of the contact between the articles when forcibly stopping them is increased, and the articles are easily deformed or damaged. Further, at the time of cutting, two articles are simultaneously cut by the acceleration force of collision between the articles on the upstream side. In the latter drive roller conveyor, if the article is forcibly stopped, abrasion occurs due to the roller whose bottom surface is rotating. This wear increases as the transport speed increases, causing damage to the article. In addition, a large load is applied to the motor.
In order to solve these problems, there is a method in which each roller is individually driven to control its rotation. However, this method requires a large number of motors, electricity, and control circuits, and is complicated and costly. It is.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to solve these problems of the prior art, and when an article is forcibly stopped by a simple and inexpensive structure, the rotation of the roller below it is stopped. It is an object of the present invention to provide a roller conveyor device which does not cause abrasion to articles by stopping and requires only a small driving source and an article storage facility using the same.

[0004]

Means for solving the above problems are as follows: 1) A roller conveyor device in which a number of horizontally long rollers are arranged in a row, and a drive shaft is arranged along the conveying direction of the roller conveyor. A plurality of pulleys having an inner diameter slightly larger than the outer diameter of the shaft are fitted on the drive shaft at a predetermined pitch, and a transmission belt is tensioned between the pulley and the roller, and is conveyed on the roller. In a state where the article is forcibly stopped, the frictional force between the inner surface of the pulley and the outer face of the drive shaft is adjusted so that the inner surface of the pulley and the outer peripheral face of the drive shaft do not slip and power is transmitted, and the article is forcibly stopped. 2) A roller conveyor device characterized in that the same roller below the roller can be prevented from rotating. 2) A roller on which a transmission belt is hung from a pulley and one or more adjacent rollers are linked by an interlock belt. 3) The roller as described in 1) or 2) above, wherein a rotatable free roller that does not transmit power is disposed between rollers that transmit the driving force of the drive shaft via a pulley. Conveyor device 4) The roller conveyor device according to any one of 1) to 3), further including a stopper device for stopping movement of the articles on the roller conveyor at the end of the roller conveyor or in the middle of the transport path and forcibly stopping the movement. ), A plurality of roller conveyors described above are connected in series, an unloading conveyor is provided along the roller transport end of the roller conveyor, the roller conveyor is used as an article storage shelf, and the stopper is operated to cut out the articles to the unloading conveyor. The article storage facility characterized in that: 6) the drive shafts of the plurality of roller conveyor devices are operated in conjunction with one motor. ) There is an article storage facility described.

[0005]

According to the present invention, since the pulley and the roller are tensioned by the transmission belt, the transmission between the pulley and the roller is performed with little slippage. On the other hand, between the pulley and the drive shaft, a contact surface (the inner surface of the pulley and the outer peripheral surface of the drive shaft) has a required frictional force, and the power of the drive shaft is transmitted to the pulley. When the article on the roller is forcibly stopped, a large friction is generated between the article bottom surface and the roller, and a large brake load is applied.The frictional force between the pulley and the drive shaft loses, and the pulley rotates. It does not slip and rotate with respect to the existing drive shaft. Therefore, even if the drive shaft moves, the rollers do not rotate, and the bottom surface of the forcibly stopped article is not damaged. On the other hand, in the case of an article on a roller that has not been forcibly stopped, the load between the article and the roller is small, so the frictional force between the drive shaft and the pulley wins, the pulley rotates, and the roller is rotated to force the article. To be transported. In a roller conveyor device in which a roller further adjacent to a pulley rotated by a transmission belt is linked by an interlock belt,
Since articles are sent by a plurality of rollers, they can be transported reliably. If a free roller is provided between the rollers to be rotated, the number of belt interlocking mechanisms can be reduced, so that the cost is reduced.

A roller conveyor provided with a plurality of roller conveyor devices of the present invention provided with a stopper device at the end of the roller conveyance or on the road and provided with an unloading conveyor along the conveyance end of the roller conveyor is a roller conveyor. A plurality of items can be stored on the top. That is, even if a plurality of articles are forcibly stopped at the end of the roller conveyance or the stopper device in the road, the rollers below the stored and forcibly stopped articles do not rotate as described above, do not damage the articles, and are not driven. Articles can be stored with little load on the shaft. As described above, the roller of the part of the article sent from the upstream of the roller conveyor acts as a drive roller to convey the article. When the stopper state of the stopper device is released, the forced stop of the stored articles is released, the load between the article bottom face and the rollers is reduced, the pulley is rotated by the drive shaft, and the rollers are rotated and stored. The articles are moved in the end direction, and the articles are cut out from the end to one or a required number of conveyers. After cutting, restart the stopper device,
The upstream article is forcibly stopped in the storage state. With such a simple structure, it can be used as an article storage facility.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The transmission belt or interlock belt of the present invention is preferably a plastic string belt having a high tensile strength, and a roller for hanging the belt is provided with a groove slightly deeper than the diameter of the string belt, and the belt is inserted in the groove. The bridge structure is preferable because the pulley does not use a pulley and the structure is simplified. The difference in radius between the inner surface of the pulley of the present invention and the outer diameter of the drive shaft is 0.01 to 0.
Normally, about 5 mm is used, and Delrin resin is preferable as the material of the pulley because of its excellent durability, strength and abrasion resistance. The adjustment of the frictional force between the pulley and the drive shaft according to the present invention includes adjusting the degree of tension of the transmission belt, adjusting the friction coefficient between the inner surface of the pulley and the outer periphery of the drive shaft, the degree of the gap between the inner diameter of the pulley and the outer diameter of the drive shaft, Adjust with materials.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The embodiment shown in the drawings is an example of a storage facility for articles, in which the roller conveyor device of the present invention is arranged in a plurality of rows by inclining by about 2 °, and a plurality of roller conveyor apparatuses arranged in a row are formed in upper and lower stages. A stopper device is provided near the end of each roller conveyor device, and an unloading conveyor is provided along the end, and the drive shaft of each roller conveyor device on the same stage is driven by one motor. Also, as the transmission belt and interlocking belt, a urethane resin string belt is used, and a part of the outer periphery of the roller is depressed slightly larger than the belt diameter as a belt hanging surface of the roller, and the belt is hung there. . There are two drive rollers driven by the belt,
One roller serves as a free roller, and three rollers constitute one set, and a roller and a pulley are arranged so that one pulley corresponds to one roller. The difference between the inner diameter of the pulley and the outer diameter of the drive shaft is 0.2
5 mm (0.125 mm in radius) is provided. Therefore, the maximum gap between the inner surface of the pulley and the outer periphery of the drive shaft is 0.2
5 mm. FIG. 1 is a plan view of the embodiment. FIG.
FIG. 2 is a front view of the embodiment. FIG. 3 is an explanatory diagram illustrating the roller according to the embodiment. FIG. 4 is a longitudinal sectional view showing a main part of the embodiment. FIG. 5 is an explanatory diagram illustrating the roller transmission mechanism of the embodiment. FIG. 6 is an explanatory diagram illustrating a gap between the inner surface of the pulley and the outer peripheral surface of the drive shaft according to the embodiment.

In the figure, B is an article storage facility of the embodiment, R is a roller conveyor device in which the roller conveyor surface of the embodiment is inclined by 2 °, 1a to 10 are components of the roller conveyor device R, and 1a is a transmission. Roller rotated by belt 4, 1 a
Reference numeral 1 denotes a roller shaft, 1a2 denotes a belt hook groove whose outer periphery is annularly depressed, 1b denotes a roller rotated by the interlocking belt 5 from the roller 1a, 1b1 denotes a roller shaft of the roller 1b, 1b2
Is a belt-hanging groove annularly depressed on the outer periphery, 1c is a rotatable free roller that is not forcibly driven, and 2 is a roller arranged in the conveying direction of a roller conveyor driven by a motor 7.
A millimeter diameter drive shaft, 3 is a pulley fitted to the drive shaft,
Reference numeral 3a denotes a belt hook groove of the pulley 3, 3b denotes an inner peripheral surface of the pulley 3 having an inner diameter of 25.25 mm,
A slight gap of about 5 mm occurs. Reference numeral 4 denotes a string-shaped plastic transmission belt that is tensioned between the belt hooking groove 3a of the pulley 3 and the belt hooking groove 1a2 of the roller 1a, and 5 denotes a belt hooking groove 1a2 of the roller 1a and a belt of the roller 1b. A string-shaped plastic interlocking belt hung between the hook groove 1b2, a cylindrical spacer 6 penetrated outside the drive shaft 2 to prevent the pulley 3 from sliding, and a roller conveyor device 7 A motor for rotating the drive shaft 2 of R, a transmission mechanism 8 comprising a sprocket 8a for transmitting the rotational force of the motor to each drive shaft, and an endless chain 8b stretched between the sprockets, and 10 a roller conveyor device R A stopper plate provided at the end (lower end) of the roller conveyor and capable of moving up and down from the roller conveyor surface; A discharge conveyor which is provided along the end of Rakonbea device R.

In this embodiment, when the motor 7 is operated, the transmission mechanism 8 using a chain sprocket composed of the endless chain 8b and the sprocket 8a is operated, and each drive shaft 2 of the roller conveyor device R is rotated. When the drive shaft 2 rotates, the pulley 3 tries to rotate the pulley 3 by the frictional force between the inner peripheral surface 3 b of the pulley and the outer peripheral surface of the drive shaft 2. When the article M is conveyed or settled without being restrained by a stopper or the like, since the friction between the article M and the rollers 1a and 1b is small, or the article M is rotated in the feed direction,
The load on the pulley 3 is small, and the pulley 3 is rotated by friction with the drive shaft 2 without slipping, and the rollers 1a and 1b are forcibly rotated by the transmission belt 4 and the interlocking belt 5, thereby moving the article M toward the terminal end (lower end). send. Next, when the stopper plate 10 near its end is raised by the cylinder 10a, the article M sent from the upstream is stopped by hitting the stopper plate 10 or the article M forcibly stopped by the stopper plate 10. Stopper plate 1
0 indicates that a plurality of articles M are temporarily stored. The rotation of the rollers 1a, 1b, and 1c under the stored article M which has been forcibly stopped is stopped by the high resistance and friction with the bottom surface of the article M, and the rollers are interlocked with the transmission belt 4 and the interlock belt 5 with the rollers. A strong non-rotating brake is applied to pulley 3
Is larger than the friction between the inner peripheral surface 3b and the outer peripheral surface of the drive shaft 2, and the pulley 3 slips and does not rotate. Therefore, the rollers 1a, 1b, and 1c below the forcibly stopped article do not rotate, do not damage the bottom surface of the article M, and can reduce the load on the motor. In the present embodiment, two rollers 1a and 1b are driven by the driving force of the drive shaft 2, and the remaining roller 1c is a free roller. Thus, the existence of the free roller 1c further simplifies the interlocking mechanism, and makes it possible to partially use the force of the article's own weight due to the inclination.

When the article M which is forcibly stopped by lowering the stopper plate 10 is cut out (feeded out), the forcible stopping force disappears, and the article M becomes movable, so that the load on the rollers 1a and 1b is reduced. Power is transmitted from the drive shaft 2 to the pulley 3 by friction between the inner surface of the pulley 3 and the drive shaft 2, and the rotation of the pulley 3 rotates the rollers 1 a and 1 b by the transmission belt 4 and the interlock belt 5, and the article M is the roller 1 a , 1b and are cut out. Therefore, even if the pressing force due to the collision when the article M collides from the upstream side to the last forcibly stopped article M acts on the downstream side article, the rollers 1a and 1b near the end are forcibly driven. The articles can be sent out at the feed speed of the rollers 1a and 1b without changing the speed so much.
Can be reliably cut out. Since the roller conveyor device of this embodiment is a forced feed, the inclination is 2 °.
It can be used as low as possible, and damage at the time of collision or contact between articles due to inclination can be greatly reduced. Further, in the present article storage facility, since the drive shaft 2 of each roller conveyor device R is driven by the transmission mechanism 8 by only one motor 7 in each stage,
The equipment can be operated with a small number of motors.

[0012]

As described above, according to the present invention, the pulley and the roller are interlocked by the tensioned transmission belt, and the pulley and the drive shaft are adjusted to have an appropriate frictional force. By transporting the power of the drive shaft to the pulleys and rollers when conveying the articles, the pulleys do not rotate and slide with the drive shafts so that the rollers can be in a non-rotating state when the articles are forcibly stopped. did. As a result, the article can be forcibly stopped with little damage, the drive source can be reduced in size, and the cutting can be reliably performed by forcible feeding. In addition, since the structure and mechanism are simple, it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment.

FIG. 2 is a front view of the embodiment.

FIG. 3 is an explanatory diagram illustrating a roller according to an embodiment.

FIG. 4 is a longitudinal sectional view showing a main part of the embodiment.

FIG. 5 is an explanatory diagram showing a roller transmission mechanism of the embodiment.

FIG. 6 is an explanatory diagram showing a gap between an inner surface of a pulley and an outer peripheral surface of a drive shaft according to the embodiment.

[Explanation of symbols]

 B Article storage equipment R Roller conveyor device M Articles 1a, 1b, 1c Roller 1a1 Roller shaft 1a2 Belt hook groove 1b1 Roller shaft 1b2 Belt hook groove 2 Drive shaft 3 Pulley 3a Belt hook groove 3b Inner peripheral surface of pulley 4 Transmission belt 5 Interlocking Belt 6 Spacer 7 Motor 8 Transmission mechanism 8a Sprocket 8b Chain 10 Stopper plate 10a Cylinder 11 Conveyor

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazufumi Castle 3-1, Higashi 3-chome Station, Koga-shi, Fukuoka F-term (reference) 3F033 BB01 BC06 BC07

Claims (6)

[Claims] 1. A roller conveyor device in which a number of horizontally long rollers are arranged in a row, wherein a drive shaft is provided along a conveying direction of the roller conveyor, and a pulley having an inner diameter slightly larger than the outer diameter of the drive shaft is provided on the drive shaft. Are fitted at a predetermined pitch, the transmission belt is tensioned between the pulley and the roller, and the inner surface of the pulley and the outer peripheral surface of the drive shaft in a state where the conveyed articles on the roller are forcibly stopped. The frictional force between the inner surface of the pulley and the outer peripheral surface of the drive shaft is adjusted so that power is not transmitted by slipping between the pulley and the roller, and the roller below the forcibly stopped article can be prevented from rotating. Conveyor device. 2. The roller conveyor device according to claim 1, wherein the roller on which the transmission belt is hung from the pulley and one or more adjacent rollers are interlocked by an interlock belt. 3. The roller conveyor device according to claim 1, further comprising a rotatable free roller that does not transmit power between rollers that transmit the driving force of the driving shaft via a pulley. 4. The roller conveyor device according to claim 1, further comprising a stopper device for stopping the movement of the articles on the roller conveyor and forcibly stopping the movement of the articles on the roller conveyor at the end of the roller conveyor or in the middle of the conveying path. 5. A roller conveyor device according to claim 4, wherein a plurality of roller conveyor devices are connected in series, an unloading conveyor is provided along a roller transport end of the roller conveyor device, the roller conveyor device is used as a storage shelf for articles, and an operation of a stopper device is performed. An article storage facility, characterized in that articles are cut out to a carry-out conveyor by means of: 6. The apparatus according to claim 5, wherein each drive shaft of the plurality of roller conveyor devices is operated in conjunction with one motor.
Article storage facility as described.