JP2008169033A - Coaxially driven roller conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a utilizing method mainly targeting an improvement in maintainability, and reducing costs by totally minimizing the number of part items, using general-purpose components, and reducing assembly and installation work man-hours, in a driving roller conveyor device. <P>SOLUTION: Development of a drive transmission roller that can transmit motor torque with little loss, and non-dedicated type manufacture and structure are achieved by integrally assembling a conveyor roller and a driving motor. General-purpose products are used for the motor and peripheral components, thereby multifunction and versatility can be achieved. Various kinds of standard products, and components to be used are used separately according to purposes, thereby it is possible to use under various special environments, and correspond to special conditions and specifications. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to making a roller conveyor for conveying cardboard boxes and various pallets having a light load to a medium load (1 kg to 1000 kg) effectively into a drive roller conveyor.

When considered as a drive roller conveyor, the conventional technology is divided into four major systems, each focusing only on solving one problem, and specializing without addressing other overall problems. Although specialization and price reduction have progressed to some extent, machines that are difficult and impossible to maintain and those that have a service life of about 3 years have become extremely large.

There are drive methods using chain drive, flat belt drive, drive shaft drive, live motor and the like. The conventional technology has only selection criteria depending on whether it is an inexpensive drive method or can be used under special conditions. There are three functions: mechanical design, electrical design, and control design. There is no one that corresponds to the above), and each driving method has its own disadvantages, so it is impossible or impossible to modify with a conventional driving method to have new functions and performance. It took a lot. Large / small (load width 100-1500mm), light / weight (1-1000kg), low / high speed (every time) with basic structure and drive system in wide selection range when transport weight and transport speed change There is no drive conveyor capable of handling 5 to 120 m / min).

The flat belt drive is suitable for transporting small items and inclined surfaces, but it is poor in energy saving and maintainability, lowers the transportable weight, and is expensive for transport efficiency.

With drive shaft drive (also called line drive, etc.), small-to-medium-sized packages can be transported, but maintenance is very poor and there are many conditional restraints, so it is generally only rotating at a constant speed. However, it is often used as a drive conveyor because it can be configured at the lowest cost.
However, problems often occur after operation due to lack of maintainability.

In the chain drive system, when the transport load exceeds 100 kg, the conventional transport system can hardly be transported unless this drive system is used, and this system is used for transporting heavy loads exceeding 1 ton. The disadvantage is that the chain drive requires a sprocket for the conveyor roller and output shaft, which is necessarily expensive.
In addition, since the actual performance limit depends on the chain performance, the conveyance torque is generated, but it is not suitable for high speed and low noise. Since lubrication is required, the area around the drive conveyor becomes dirty with oil, so in recent years there is a strong tendency to be avoided by users.

There is a drive roller conveyor device of a type that has a motor built in a roller, also called a live motor. The feature is that there is no need for a space for placing the drive unit as in other drive devices, and the drive roller can be controlled for each narrow range only by turning the power on and off because it is driven several times. However, since the motor is installed in the roller, there are many roller locks (restraint) and motor burnout due to heat, and the unit price of one live motor is very expensive and requires delivery, etc. With protective functions and special functions Since things are even more expensive, they have a bad reputation for their actual utility value.

Conventionally, since the transport driving method is changed depending on the weight of the transported baggage, the drive roller conveyor is actually in a state where there is no standard driving method. Therefore, we proposed a simple drive conveyor that can transport 1 to 1000 kg of transported goods from low speed to high speed (5 to 120 m / min) with one type of drive system (can be large or small depending on the specifications). The goal is to develop a conveyor that can be called.

Live motors have many drawbacks and cannot be evaluated as good, but they can be easily controlled by the small space required for the drive unit and the conveyor rollers can be rotated in units of several units, and several units of repair are available. It is very easy to use because it is possible to make it possible in a narrow range, so that it is possible to easily cope with future control and energy saving with 2 to 12 rollers as one drive unit. To do.

Use parts that are generally available in the basic structure as much as possible. The basic shape is the same even under special conditions, and it is possible to change the material. The purpose is to simplify processing and assembly and facilitate maintenance that occurs later by using standard products.

Eliminate unnecessary torque generated during transmission of driving force to the roller and make the transport torque sufficient with the motor output of 3 to 4 times that of the conventional system. The purpose of this is to increase the speed limit and improve the quietness during transportation.

The purpose is to eliminate the adjustment part by integrating the conveyor roller and the drive part, eliminating the need for assembly adjustments by engineers / experts, simplifying the work and assembly work, and facilitating maintenance work. To do.

The present invention is characterized in that the driving motor and the free roller are directly driven, and several free rollers arranged in front and back can be driven simultaneously using a driven roller.

The vertical position and the front-rear direction of the position where the driven roller is installed are sandwiched between two conveyor rollers and can always apply tension to generate an appropriate transport torque. It is characterized by having only a guide and a pad.

The tension and contact pressure of the driven roller and conveyor roller can be maintained with a general push spring, and the spring pressure is changed as necessary. When high accuracy and high torque are required, a strong spring pressure is applied, and the motor is burned by the roller lock. When it is desired to prevent accidents such as pinching of a user's finger, etc., the conveyor device characteristics can be easily set and changed only by the spring pressure of the push spring, such as a weak spring pressure.

By fixing the motor of the coaxial drive type roller conveyor with a torque shaft using a hollow shaft type speed reducer, the adjustment part and attachment parts between the motor and the drive roller are eliminated, so that the tension of the chain and the meandering of the flat belt are adjusted. It is characterized in that no difficult work such as centering and tension adjustment is required at every installation site and maintenance.

By configuring only parts that are generally sold and standardized that may require maintenance such as wear and deterioration when operating conveyor rollers, drive motors, etc., maintenance parts The unit price and acquisition date are short, and mass production becomes easy. It is characterized in that the necessary parts at the time of maintenance after operation are composed only of items that can be obtained with a delivery date of 2 to 3 days.

Since the parts used for conveyor rollers, drive motors, etc. are composed of general parts, a wide variety of special specification parts can also be used and selected. This makes it possible to easily develop and handle conveyors that meet various special specification conditions.

By making the parts that operate when driven as a conveyor such as a drive motor pulley, driven roller, conveyor roller, etc., only with a circular motion, the unnecessary load and friction during operation can be reduced to 10-30 minutes. As a result of the above, it is possible to reduce noise at the same transport speed as the conventional drive roller conveyor, downsizing the drive motor necessary for driving, energy saving, longer life, high speed transport exceeding 120 m / min, etc. It is possible to realize the above simultaneously.

By driving 2 to 12 conveyor rollers with one drive motor, basic design, assembly, maintenance, control method, etc. can be considered in units of 2 to 12 (100 to 1800 mm in conveyor length). After that, you should design it continuously by extending and repeating. Therefore, in designing, it is not necessary to design the drive part every time the specification conditions change, and many parts can be handled in manufacturing and assembly. Repairs and parts at the time of maintenance are almost the same, and control of operation / stop is easily possible in a short range (2 to 12 rollers) in terms of control.

Embodiment of the Invention

The form of the coaxial drive type roller conveyor is as shown in FIG . What is important at this time is that the size of the conveyor frame and the conveyor roller and the motor output and strength are determined according to the weight of the load and the usage conditions.
The reason for this is that when the transport load is 100%, a load is applied to a roller carrying 50 to 20% of the load, and the frame is loaded with 100% load from 2 to 5 rollers. However, the friction between the conveyor roller surface and the load slips and slips with a pull of 30 to 50% of the load, so that the brake performance of less than half of the load is sufficient between the load lengths.
Further, the motor torque required for conveyance can be sufficiently conveyed at 3 to 5% with respect to the load in the case of the conveyor roller, and about 10% with respect to the load is sufficient even when stopping by braking.

The coaxial drive type roller conveyor is basically configured to transport one piece of cargo with one drive part, so the weak part (point that becomes a bottleneck) where mechanical strength problems occur becomes a conveyor roller. come.

The position form of the coaxial drive type roller conveyor is a form in which the output shaft of the hollow shaft type reduction gear is arranged coaxially with the conveyer roller that is driven 03 as shown in FIG. 1 and the drive shaft is held by the bearing unit. In this way, the drive conveyor roller and the drive motor are integrated, and the drive motor does not require any adjustment or fixing to the frame as long as it has a torque arm that prevents rotation.

As shown in FIG. 1 , the driven roller is installed in such a manner that the roller portion of the 02 driven roller is sandwiched from the lower center between the two 03 conveyor rollers. 02 The driven roller extends the bottom of the bracket that sandwiches the roller so that the lower 12 driven roller rails are not misaligned. The position center of the driven roller is automatically corrected when the motor is driven, and the position center matches. With this method, even if the processing accuracy is low, sufficient driving ability can be obtained by applying the conveyor roller.

The basic configuration is as described above. After that, the machine configuration may be adjusted in accordance with the actual use environment and the conditions of the transport weight and transport speed.

FIG. 4 is a photograph of the machine that was actually delivered and operated. 5 and 6 show an embodiment according to the present invention.

Although FIG. 4 shows a machine that is actually used, the coaxial drive type roller conveyor is completed as one drive roller conveyor for every 2 to 12 conveyor rollers (12 in FIG. 4 ) . Therefore, it can be easily used as a drive roller conveyor on a cart or a lifter, and the control of transporting one piece at a time in units of blocks as shown in FIG. 6 can be easily realized.

As shown in FIG . 5 , 2 to 12 conveyor rollers are driven to complete a single conveying device, so even if the conveyor frame is 3 or 5 meters, 3 or more drive blocks are connected. It is all right. Thanks to that, with the basic transport function, if you prepare a conveyor roller, a driven roller, and a drive motor, you can cope with all the problems that occur and can be maintained. In addition, since there is no fixing or adjusting portion with a bolt or the like during the basic transfer function, all maintenance can be performed with one radio pliers.

FIG. 5 shows the positional relationship of the photoelectric tube sensor when it is intended to operate as a conveyor with storage (accumulation) function and a conveyor with energy saving function for the system . However, it is mechanically different from FIG. 6 as a driving roller conveyor.

When the drive control is performed as in FIG. 5 , it is necessary to select how many conveyor rollers are driven as one block depending on the size of the load to be conveyed.
When using it as a conveyor with storage function, it is necessary to make it the same as or shorter than the transported bag length when using it as an accumulator function conveyor. Even several blocks can be controlled simultaneously.

The image of the control method when the conveyor of FIG. 5 is driven and controlled is as follows.

When a conveyor with storage function is used, when there is no cargo downstream of the block to be controlled, the conveyor is driven and the cargo is unconditionally flowed, and when there is a baggage in the downstream block Stop the load in front of the block (adjust with the sensor timer function). After that, the transport is resumed when there is no more downstream load. By inserting such software for each block, storage operation can be easily performed.

When the conveyor with an accumulator function is used, if there is no load downstream of the block to be controlled, the load will continue to flow unconditionally. The time required to flow through the block distance + an extra few seconds, then stop driving. By doing so, even if there is a gap with the downstream conveyor, it is possible to arrange the packages cumulatively without any gap by the pressing action. After that, the transport is resumed when there is no more downstream load. Accumulation can be easily performed by putting such software into each block.

When the conveyor with energy saving function is used, when there is no load in the block to be controlled and the block one upstream, the driving of the conveyor is stopped to save useless power. Then, the conveyor is driven for the first time when a load comes to the block one upstream. Then, the conveyor is stopped again when no more luggage is left on the controlled block. By putting such software into each block, it becomes possible to easily perform energy saving operation. By using energy saving, the necessary electricity bill becomes 6 to 1/12 of the conventional, and the life of the machine is about 3 to 6 times longer.

FIG. 6 is an example of use in a merging / branching conveyor line using a linear drive transmission roller. The upper figure is the merge line and the lower figure is the branch line.

In the merging conveyor in the upper diagram of FIG. 6 , the 08 merging conveyor merging line flows into the 07 merging conveyor main line that continues to rotate at a constant speed and merges. The point at this time is that the mechanical operating parts are basically just connecting one block shown in Fig. 4 together, so the mechanical drive part is 5 minutes at one place even in such a special transport machine. Maintenance can be done to the extent possible. By increasing the speed of the tip part of the 08 merge line to some extent, it is possible to merge the cargo by the operation of throwing it in, instead of changing the direction by rubbing the load against the guide. Moreover, by using the driven roller well, a narrow conveyor roller having a width of about 50 mm such as the head of the merge line can be driven.

In the branch conveyor shown in the lower part of FIG . 6 , the 09 branch conveyor main line is pushed by the dider bar and branched (selected) into the 10 branch conveyor branch line.

The invention's effect

The most important of the effects in the present invention is that unnecessary items are deleted to the limit, and the mechanical performance is sufficient while the number of parts seems to be the smallest. In general, it has a simple basic structure with parts sold and standardized.

As a result, the design can be simplified by continuously using the same structure at the time of designing and manufacturing, and the number of processing steps can be reduced. At the time of maintenance, if appropriate preparations are made for repairing the conveyor, the drive unit of the conveyor can be replaced and restored in about 5 minutes at one place.

In the case of the direct drive transmission roller, the allowable range of the transported luggage is 1 to 1000 kg, so that most of the luggage can be handled as physical transportation.
And the technical machine configuration required as a machine regardless of whether it is small or large is exactly the same. Therefore, it seems that the basic structure will be used in a wide range in the future because it can be manufactured more easily than any conventional conveyor device and can be reduced in cost.

In terms of performance, the mechanical and unnecessary load (torque) has been reduced by eliminating the chain and flat belt and simplifying the structure. By being sufficient for performance, it leads to energy saving, longer life, and downsizing.

In addition, the useless load (torque) has been reduced, reducing vibration, noise, and frictional resistance, making it possible to increase the speed several times faster than before, and speed control and position control servo motors and DC brushless motors. Precise and complex control using it has become possible. However, in this application, the speed can be increased up to about 480m theoretically with regard to speeding up, but since there is no standard conveyor roller that supports high speed transportation, the speed is limited to 120m per minute. Yes.

The environment that can be supported by the small number of parts is also increasing. Since there are few rotating parts and transmission parts which are the biggest problems when considering environmentally resistant products and environmental conditions, it is sufficient to use special environmentally friendly products with three points: drive motor, driven roller and conveyor roller. The conditions that make it possible to respond are clean rooms, humid environments, drip-proof environments (IP65 level), food processing plants, washing lines, explosion-proof environments, chemical transport environments, electrical noise and static electricity elimination, Examples include the environment where static elimination is necessary.

Considering the coaxial drive type roller conveyor from the electrical and control aspects, even when the conveyor device is turned on and off every 6m or 12m, the total power consumption of the drive motor is small, so the conventional 3 minutes If the sensor and the control device are incorporated in the energy saving control, for example, the conveyor roller of 6m length is driven 1m at a time, and the load is conveyed to control energy saving. As a result, one-sixth of the drive power is sufficient, and ultimately (mechanical energy savings of 1/3) x (electrical energy savings of 1/6) = 1/18 of energy savings. Can be measured. Actually, it varies depending on the environment and conditions to be used, but if it is a conveyor with an energy saving function, the conventional energy saving and power saving can be reduced to 1/10 to 10/10.

The energy saving control not only saves electricity, but also saves mechanical durability time, and the mechanical life of the conveyor can be increased by 3 to 6 times.
In summary, the conveyor can be used with a machine life of 3 to 6 times and an electricity bill of 30 to 1/10 at a price range almost equivalent to that of a conventional constant speed chain drive conveyor. In addition, there is no sound during conveyance except during conveyance, and maintenance is possible in about 5 minutes at one location.

As described above, the energy saving control has a great advantage compared with the necessary cost. If the energy saving control is correctly recognized in the future, it should be attached to almost all the conveyor devices. Further, since it can be used together with the storage function and the accumulating function, the necessity is increasing.

It is the schematic which looked at the positional relationship of a "coaxial drive type roller conveyor" and a driven roller from the side. It is the schematic which looked at the positional relationship of a "coaxial drive type roller conveyor" and a driven roller from the front. It is a driven roller of a “coaxial drive type roller conveyor”. It is a usage example of the conveyance conveyor comprised with the "coaxial drive type roller conveyor" and a driven roller. It is the schematic of a photoelectric sensor position when manufacturing the storage conveyor (accumulation conveyor) using a "coaxial drive type roller conveyor". It is the schematic showing the example when manufacturing a confluence | merging / branch conveyor using a "coaxial drive type roller conveyor".

Explanation of symbols

01 Coaxial drive type roller conveyor drive unit 02 driven roller 03 conveyor roller 04 conveyor frame 05 photoelectric sensor 06 work stopper 07 junction conveyor main line 08 junction conveyor junction line 09 branch conveyor pusher 10 branch conveyor branch line 11 driven roller support angle 12 driven roller Rail

Claims (8)

By directly transmitting the rotational force of the motor to the rollers of the conveyor roller, the loss of the motor rotation transmission torque is reduced as much as possible, and the required motor output is reduced to about one third or less when compared with conventional conveyor devices, saving torque. Coaxial drive type roller conveyor, which makes it possible to reduce the energy consumption, reduce the size and simplify the drive unit. By using the rollers of the conveyor roller as part of the holding guide, the holding parts can transmit torque (rotation) simply by pressing them with appropriate spring pressure, and the chain, flat belt, idler, etc. Eliminating this contributes to torque saving, and at the same time greatly reduces the number of parts and makes the entire conveyor small and simple. Coaxial drive is characterized in that the drive motor is assembled on the same axis as the drive roller, so that it is not necessary to adjust the accuracy of the drive unit, and even roller conveyors with poor processing and assembly accuracy can be assembled to meet basic standards. Type roller conveyor. Since all of the drive transmission part is only a circular motion, the load due to vibration and friction during driving is greatly reduced, and the maximum transport speed as a conveyor is 120 m / min or more per minute, which is the maximum speed as a conveyor transport device. A coaxial drive type roller conveyor which is possible and has a very small driving load. No chain or flat belt drive parts are used in the drive transmission part, so there is no need to adjust the tension of the chain or flat belt and lubrication every time during manufacturing or maintenance work, making manufacturing and maintenance easy Coaxial drive type roller conveyor characterized by no scattering of oil and wear powder. To rotate the conveyor roller, the rotational force of the driving roller can be transmitted by pressing the roller portion of the driven roller with an appropriate spring pressure. The conveyor roller that rotates with the driven roller can be used under the same conditions as the conveyor roller that rotates with the driving roller, so all the conveyor rollers can be used with standard straight rollers, unified roller shape, high speed conveyance, high precision of machine parts, Coaxial drive type roller conveyor, which is capable of lowering transport noise, extending mechanical life and reducing costs. Conventionally, by fixing all the guides and level adjustment brackets where adjustment is required on the coaxial drive roller conveyor, it is possible to disassemble and assemble without having to adjust any motors or rollers at the time of replacement or repair of machine parts, so work is very quick Because there are only four parts (motor body, driving roller, driven roller, free roller) that need to be replaced, there are very few spare parts for maintenance and replacement. A coaxial drive type roller conveyor. When transported as a drive conveyor, the conveyor can be easily controlled by reducing the power consumption and separating each block of the drive motor. The energy saving control by this means that the power consumption is about 15 to 30 times that of a conventional drive conveyor, and the machine life can be extended 3 to 6 times. In addition, the coaxial drive roller conveyor is characterized in that, when an energy saving function and a position control function are added, energy saving control can be performed at the same price as a conventional constant speed chain drive conveyor.