JPH05178430A - Conveying rollers and conveying system for articles - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to reliably and easily control the transport speed of various weighted articles without changing equipment.
To enable stable and constant-speed transportation, temporary stop, and acceleration / deceleration transportation of these various items. A roller body 14 supported by a drive shaft 13 that is forcibly driven so as to rotate freely, an electromagnet 15 fixed to the drive shaft 13, and an end portion of the roller body 14 facing the electromagnet 15 are fixed. 1 is a conveyance roller 10 for an article, which includes a magnetic body 16 and a voltage adjusting unit 17 that adjusts the supply voltage to the electromagnet 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article conveying roller and a conveying system suitable for use in an accumulation roller conveyor, a belt conveyor, etc. for constant speed conveyance, temporary stop, acceleration / deceleration conveyance, and the like.

[0002]

2. Description of the Related Art Conventionally, an accumulation roller conveyor disclosed in JP-A-53-576 has been proposed. In this conventional technique, a roller body supported by a drive shaft that is forcibly driven so as to rotate freely, a permanent magnet fixed to an end of the roller body, fixed to the drive shaft, and arranged facing the permanent magnet. It has a drive ring and the like.

In this prior art, the roller body is always rotated at a constant speed integrally with the drive ring by the permanent magnet, and when a load of a certain amount or more is applied to the roller body, the roller body slides between the permanent magnet and the drive ring. Is caused to stand still. Thereby, the conveyance of the article is stopped and the article is stored.

[0004]

However, the prior art has the following problems. It is only possible to carry an article of a specific weight at a constant speed, and when the article weight changes, it is necessary to change equipment such as using a permanent magnet having a different magnetic force.

It is impossible to temporarily stop or accelerate or decelerate an article of a specific weight that is in a constant speed conveyance state. Therefore, when the article is stopped or stored on the conveyor, it is necessary to cause the article to collide with the stopper or the preceding stop article, which may damage the article.

The present invention makes it possible to reliably and easily control the conveying speed state of various articles having different weights without changing the equipment, and stably convey the various articles at a constant speed, temporarily stop, and accelerate / decelerate. The purpose is to enable.

[0007]

According to a first aspect of the present invention, there is provided a roller body that is supported by a drive shaft that is forcibly driven so as to rotate freely, an electromagnet that is fixed to the drive shaft, and the roller body. An article conveying roller configured to have a magnetic body fixed to an end facing the electromagnet, and a voltage adjusting unit that adjusts a supply voltage to the electromagnet.

According to a second aspect of the present invention, there is provided an article conveying system in which a conveyor constituted by using the conveying rollers according to the first aspect is extended along a conveying line, and the weight of the article is recognized. In addition to the weight recognizing unit, an arithmetic control unit for arithmetically controlling the supply voltage adjustment state of each of the transport rollers by the voltage adjusting unit based on the recognition result of the weight recognizing unit is provided.

According to a third aspect of the present invention, in addition to the second aspect of the present invention, the arithmetic and control unit causes the supply voltage adjusting device for the respective conveying rollers by the voltage adjusting section to change the article conveying timing by the respective conveying rollers. It is adapted to control.

[0010]

According to the present invention, there are the following actions. When electric power is supplied to the electromagnet fixed to the drive shaft, the roller body integrated with the magnetic body can rotate due to the magnetic attraction between the electromagnet and the magnetic body.

At this time, the electromagnet and the magnetic body cause a certain slip due to the correlation between the load torque of the roller body and the magnetic attraction force. The magnetic attraction force is determined in proportion to the supply voltage applied to the electromagnet, and the load torque of the roller body is determined in proportion to the weight of the article. Therefore, by selecting an appropriate supply voltage for the weight of the article, it is possible to secure a certain slippage between the electromagnet and the magnetic body, and thus to obtain a constant speed state corresponding to the slippage in the roller body. You can

According to the above, when various articles having different weights are sequentially conveyed, a certain slip is ensured between the electromagnet and the magnetic body by appropriately adjusting the supply voltage to the electromagnet in accordance with the weight of each article. However, the speed state of the roller body can be made constant for any article.

As described above, even with respect to the same article, the slip ratio between the electromagnet and the magnetic body is changed by appropriately adjusting the supply voltage to the electromagnet, whereby the speed state of the roller body is temporarily stopped and increased. Or you can slow down.

Due to the above items, it is possible to reliably and easily control the conveying speed state of various articles having different weights without changing the equipment, and to stably convey the various articles at a constant speed, temporarily stop, and accelerate / decelerate. It can be possible.
Therefore, various articles having the same or different weight can be conveyed on the conveyor at a constant speed and a constant pitch. In addition, even when an item is stopped or stored on a conveyor, it is not necessary to collide the item with a stopper or a preceding stop item, and stable article transfer control is performed without the risk of item damage. it can.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing an example of a carrying roller of the present invention, FIG. 2 is a schematic diagram showing an accumulation roller conveyor to which the present invention is applied, and FIGS. 3 (A) and 3 (B) are FIG.
FIG. 3 is a cross-sectional view of the electromagnet and the roller body as seen from a direction along line A-A and line B-B in FIG.

The transport roller 10 shown in FIG. 1 is driven by a motor 11 via a sprocket wheel 12 to drive the drive shaft 1.
3, the roller body 14, the electromagnet 15, and the magnetic body 1
6 and a voltage adjusting unit 17.

The roller body 14 is supported by the drive shaft 13 via a bearing 18 so as to be free to rotate. The electromagnet 15 is the magnetic coil 1
It is composed of 5A and a core 15B, and is fixed to the drive shaft 13.

The magnetic body 16 is fixed to the end of the roller body 14 facing the electromagnet 15 in a non-contact state with the electromagnet 15. An iron plate, a permanent magnet, or the like can be used as the magnetic body 16. The magnetic coil 15A, the core 15B, and the magnetic body 16
The number of magnetic coils 15A, core 15B need not be two
The number of magnetic bodies 16 does not have to be the same. The point is that the electromagnet 15 and the roller body 14 may be discontinuously arranged in the rotation direction.

Therefore, the transport roller 10 has the following effects. Electromagnet 1 fixed to drive shaft 13
When the electric power is supplied to 5, the roller body 14 integrated with the magnetic body 16 can rotate due to the magnetic attraction between the electromagnet 15 and the magnetic body 16.

At this time, the electromagnet 15 and the magnetic body 16 are
A certain slip occurs due to the correlation between the load torque of the roller body 14 and the magnetic attraction force. The magnetic attraction force is determined in proportion to the supply voltage applied to the electromagnet 15, and the load torque of the roller body 14 is determined in proportion to the weight of the article. Therefore, by selecting an appropriate supply voltage with respect to the weight of the article by the voltage adjusting unit 17, it is possible to secure a certain slippage between the electromagnet 15 and the magnetic body 16, and thus the roller body 14 is prevented from slipping. A corresponding constant speed condition can be obtained.

Therefore, the accumulation roller conveyor 20 shown in FIG. 2 is constructed by arranging a large number of the above-mentioned conveying rollers 10 continuously along the conveying line.

The conveyor 20 has a measuring conveyor 21 arranged on the entrance side of the conveyor 20.
1, the weight of the article 1 (1A, 1B, 1C, etc.) is measured and recognized.

Further, the accumulation roller conveyor 20 is equipped with an arithmetic and control unit 22. The arithmetic and control unit 22 arithmetically controls, based on the weighing result of the weighing conveyor 21, the supply voltage adjustment state for each of the transport rollers 10 by the voltage adjusting unit 17 so as to realize the speed state desired to be secured in the transport roller 10.

That is, the arithmetic and control unit 22 controls each of the transport rollers 1
The supply voltage adjustment state for 0 is calculated, and the voltage adjustment unit 17 is controlled based on the calculation result, and as a result, the target speed state is realized for each of the transport rollers 10.

At this time, the accumulation roller conveyor 20 is provided with a power supply switching section 23 between the voltage adjusting section 17 and the electromagnet 15 of each conveying roller 10. As a result, the arithmetic and control unit 22 controls the supply voltage to the respective conveying rollers 10 by the voltage adjusting unit 17 in accordance with the switching control of the power supply switching unit 23 in accordance with the article conveying timing by the respective conveying rollers 10. That is, each conveyance roller 10
Immediately before the article reaches the roller 10, an appropriate supply voltage arithmetically controlled by the arithmetic and control unit 22 is applied to realize the target speed state on the transport roller 10.

Therefore, the accumulation roller conveyor 20 has the following effects.

Various articles 1 (1A, 1B, 1) having different weights
(E.g., C) is sequentially conveyed, the supply voltage to the electromagnet 15 is appropriately adjusted in accordance with the weight of each article 1 to ensure a certain slip between the electromagnet 15 and the magnetic body 16, thereby ensuring the roller body. The speed states of 14 can be made constant for any of the articles 1.

Also, for the same article, the slip ratio between the electromagnet 15 and the magnetic body 16 is changed by appropriately adjusting the supply voltage to the electromagnet 15, thereby temporarily stopping the speed state of the roller body 14. , Can speed up or slow down.

Therefore, it is possible to reliably and easily control the conveying speed state of various articles 1 having different weights without changing the equipment, and to stably convey the various articles at a constant speed, temporarily stop, and accelerate / decelerate. can do. Therefore, various kinds of articles having the same or different weights are moved on the conveyor 20 at a constant speed,
Can be transported at a fixed pitch. Further, even when the article is stopped or stored on the conveyor 20, it is not necessary to cause the article to collide with a stopper or a preceding stop article, and stable article conveyance control that does not involve the risk of article damage is achieved. Can be implemented.

In the practice of the present invention, the weight recognizing unit is not limited to one that directly weighs the weight of an article by a weighing conveyor or the like, and the weight code is assigned to the type code through a type code reader attached to the article. Other means such as indirectly recognizing the weight of the corresponding article may be used.

Further, in the practice of the present invention, the transport system may be a belt conveyor constructed by winding a transport belt around the transport roller of the present invention.

[0032]

As described above, according to the present invention, it is possible to reliably and easily control the transport speed state of various articles having different weights without changing the equipment, and to stably control the various articles at a constant speed. It is possible to carry, temporarily stop, and accelerate / decelerate.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a conveyance roller of the present invention.

FIG. 2 is a schematic view showing an accumulation roller conveyor to which the present invention is applied.

3 (A) and 3 (B) are lines AA and BB in FIG.
It is sectional drawing of the electromagnet and the roller body seen from the direction along a line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Article 10 Conveying roller 13 Drive shaft 14 Roller body 15 Electromagnet 16 Magnetic body 17 Voltage adjusting unit 21 Measuring conveyor (weight recognition unit) 22 Arithmetic control device

Claims (3)

[Claims] 1. A roller body that is supported by a drive shaft that is forcibly driven so as to rotate freely, an electromagnet that is fixed to the drive shaft, and a magnetic body that is fixed to an end of the roller body that faces the electromagnet. An article conveying roller configured to include a voltage adjusting unit that adjusts a supply voltage to the electromagnet. 2. An article carrying system comprising a conveyor configured by using the carrying roller according to claim 1 and extending along a carrying line, the article carrying system including a weight recognition unit for recognizing a weight of the article. An article conveyance system comprising an arithmetic control device for arithmetically controlling a supply voltage adjustment state of each conveyance roller by a voltage adjustment section based on a recognition result of the weight recognition section. 3. The article conveying system according to claim 2, wherein the arithmetic and control unit controls the supply voltage adjusting unit for the respective conveying rollers by the voltage adjusting unit in accordance with the article conveying timing by the respective conveying rollers.