JPH0319131B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for applying predetermined treatments to various materials.
For example, it relates to a circulating vibration conveyor for heating and drying.

[Conventional technology and its problems]

For example, in order to heat and dry a certain material, it is known that the material is discharged from a hopper, heated by applying hot air while it falls, received by a belt conveyor or bucket conveyor, and then returned to the hopper. There is. That is, since a single heat drying process at the time of discharge from the hopper is insufficient, the material is circulated and heat drying processes are performed several times to obtain a predetermined heat drying state.

However, in the above-mentioned apparatus, the belt conveyor or bucket conveyor is always driven at a constant transfer speed, which is not preferable in terms of energy consumption. Furthermore, since the arrangement of the devices requires a large height, installation is difficult.

In order to deal with this problem, it is conceivable to arrange a plurality of vibrating conveyors in a closed loop and perform the heating drying process on any or all of the vibrating conveyors. As a vibrating conveyor, for example, one is known that uses a single electric motor and converts its rotational force into a linear vibrating force as an excitation source.
In the case of this conveyor, a large torque is required during start-up, which requires an unnecessarily large electric motor. Although steady vibration can be obtained quickly and stably in this way, the electric motor is unnecessarily large to maintain steady vibration. Also,
Since the material is transferred at a constant speed, it is further disadvantageous in terms of energy consumption.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above problems, and an object of the present invention is to provide a circulating vibration conveyor that does not require a large height in terms of device arrangement and is far more advantageous in terms of energy consumption than conventional conveyors.

[Means for solving problems]

The above object includes a trough provided with a material transfer path, a counterweight disposed below the trough, an elastic means for coupling the trough and the counterweight, and two elastic means disposed on the counterweight. a drive motor, a crankshaft that converts rotational motion by these drive motors into linear motion, one pulley that is each pivotally supported by the driveshafts of the two drive motors and has the same diameter, and one pulley that is pivotally supported by the crankshaft, The other first pulley and the other second pulley have different diameters from each other, each belt wound between the first and second pulleys and the one pulley, and the linear motion force of the crankshaft. A plurality of vibrating conveyor sections each having a transmission means for transmitting information to the trough are arranged in a closed loop, and a material supply port and/or a material discharge port that can be opened and closed are formed in any of these vibrating conveyor sections. Both of the drive motors are driven until the time when the trough is in steady vibration, and both the drive motors are driven from the time when the trough is in steady vibration until the material inputted from the material supply port is distributed throughout the plurality of vibrating conveyor sections. or only the drive motor connected to the first pulley is driven to transfer the material, and after the material is distributed throughout the plurality of vibrating conveyor sections, driving one of the drive motors. is stopped and the other drive motor is driven to carry out predetermined material processing, and after the predetermined material processing, the material discharge port is opened and at least the first pulley with the smaller diameter is connected. The present invention is achieved by a circulating vibration conveyor characterized in that the material is discharged from the plurality of vibration conveyor sections by driving the drive motor.

[Effect]

When performing specified material processing, a large torque is required at startup and during steady vibration of the trough, so two drive motors are driven, and during material processing, which takes the longest time, one of the drive motors is operated. Energy consumption is reduced because only the material is driven, and energy consumption can be further reduced by reducing the material transfer speed or reducing it to zero. In addition, instead of stopping both drive motors to reduce the transfer speed to zero, the drive motor connected to the large-diameter second pulley is driven to vibrate the conveyor, so the transfer speed can be increased again. The first one with the smaller diameter
When the drive motor connected to the pulley is driven, the impact force is small. When both drive motors are started from a stopped state at the same time, a large impact force acts on each part of the conveyor, shortening its mechanical life, but according to the present invention, the large impact force acting upon startup is minimized. be able to. Further, since the material is vibrated even when the transfer speed is zero, material processing can be performed more quickly than when the material is stopped.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, a circulating vibration conveyor for heating and drying according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, in this embodiment, four vibrating conveyor sections 1, 2, 3, and 4 are arranged in a substantially square shape. Since these conveyor sections 1 to 4 have substantially the same configuration, the conveyor section 1 will be representatively explained below with reference to FIGS. 2 and 3. A hood 6 is attached to the trough 5 to form a sealed structure. A material supply port 7 is formed at one end of the trough 5, and the material supplied from this port is transferred to the right over a punched metal 42 stretched within the trough 5. A large number of openings are formed in the punched metal 42, and the size thereof is sufficiently smaller than the particle size of the material to be transferred thereon. The inside of the trough 5 is vertically defined by the punched metal 42 into a material transfer space and a hot air introduction space, and the hot air introduction space is connected to the hot air introduction space through an air pipe 60 and a manifold 10 fixed to both side walls of the trough 5. Hot air is blown in from outside. It is assumed that the manifold 10 is attached to the trough 5 via a flexible bellows, although this is not clearly shown in the drawings.

The material transfer space communicates with an exhaust duct 9 fixed to the approximate center of the hood 6, and the hot air blown into the hot air introduction space passes through the material layer on the punched metal 42 to the material transfer space and the exhaust duct 9. It is designed to be exhausted to the outside.

The trough 5 is connected to a counterweight 18 by a pair of levers 11 on the left and right in the material transfer direction and a coil spring 12 as an elastic means, and the counterweight 18 is gradually lowered toward the left in the figure. Long pillar 15,
16, 17, and 17' via anti-vibration springs 13. As a result, the entire conveyor section 1 is arranged to be inclined upward with respect to the material transport direction.

Near the other end of the trough 5 is a gate 4 that can be opened and closed.
0 is attached, and although not shown, the gate 40 is pivotally connected to a drive rod of a gate drive unit fixed inside the trough 5, and as this rod expands and contracts, the gate 40 moves as shown by the two-dot chain line and the solid line in FIG. As shown, the gate 40 is opened and closed by rotating around a shaft 41.

Electric motors 19, 30 are fixed on the cross member (FIG. 3) which is fixed to the counterweight 18. Electric motors 19 and 30 may have the same capacity, or 30 may have a greater capacity.

Small pulleys 31 and 35 are fixed to one end of the rotating shaft of the electric motors 19 and 30, and one of the small pulleys 31 and 3
The rotational force of No. 5 is transmitted to the other large pulley through the belts 21 and 26, that is, the first pulley 32 and the second pulley 3.
7. First pulley 32, second pulley 3
7 is fixed to both ends of the crankshaft 33,
The diameters of the small pulleys 31 and 35 are the same, but the diameter of the first pulley 32 is smaller than the diameter of the other second pulley 37.

The crankshaft 33 includes a transmission means for transmitting the rotational force of the crankshaft 33 to the trough 5. That is, the crankshaft 33 is supported by bearings 34a, 34b, one end of the drive rod 24, 38 is pivotally connected to the crank part near both ends, and the other end is supported by the plate rubber bushes 23, 3.
It is attached to both side walls of the trough 5 via 9. The plate-shaped rubber bushes 23 and 39 consist of a rubber plate 25 and a mounting plate 26 attached to both sides of the other end of the drive rods 24 and 38.
Reference numeral 6 denotes a mounting member 2 fixed to both side walls of the trough 5.
It is fixed at 2. Note that a drive control circuit is connected to the electric motors 19 and 30, so that they can be selectively driven.

Further, a connection inlet 57 for receiving material from the upstream vibrating conveyor section 4 is formed near the material supply port 7 of the trough 5, and a connection inlet 57 for receiving material from the upstream vibrating conveyor section 4 is formed near the gate 40. A connection outlet 8 is formed for introducing material.

The vibrating conveyor sections 2, 3, and 4 are also constructed in substantially the same manner as the vibrating conveyor section 1 described above, and each has connection inlets 50, 53, 55 and connection outlets 52, 54,
56 is formed.

Although the embodiment of the present invention is configured as described above,
Next, this effect will be explained. In the following description, each part of the vibrating conveyor section 1 is indicated by reference numerals, but the same applies to the corresponding parts of the other vibrating conveyor sections 2 to 4.

At startup, both electric motors 19 and 30 are driven. As a result, a large driving force for starting is obtained, and the trough 5 receives an impact force at first, but immediately begins to perform stable steady vibration.
Note that the rubber bushes 23 and 39 greatly reduce the impact force at the time of startup.

When steady vibration starts to occur, one electric motor 3
0 is stopped, and only the other electric motor 19 provides the driving force. That is, the rotation speed of the crankshaft 33 is determined by the diameter ratio of the first pulley 37 and the small pulley 31.
rotates, and the trough 5 vibrates at this frequency.

The material input from the supply port 7 is punched metal 5
is transferred to the right at a high transfer speed, and during this time,
It is heated by receiving hot air. The material is discharged from the connection outlet 8 to the connection inlet 50 of the next vibrating conveyor section 2, and is transferred in the direction of the arrow shown in FIG. 1 while being heated by the vibrating conveyor section 2 which also vibrates. Thereafter, the material is similarly transferred through the vibrating conveyor sections 3 and 4 in the direction of the arrow, and is discharged from the connecting outlet 56 of the last vibrating conveyor section 4 to the connecting inlet 57 of the first vibrating conveyor section 1. The material supply to the material supply port 7 is stopped. That is, the supply of material to the material supply port 7 is stopped when the material has been distributed to all the vibrating conveyor sections 1 to 4. This time, driving of the electric motor 19 is stopped and driving of the other electric motor 30 is started. As a result, the crankshaft 33 comes to rotate at a rotational speed determined by the diameter ratio of the large-diameter second pulley 37 and the small pulley 35, and the trough 5 comes to vibrate at this frequency. In other words, as the frequency decreases, the amplitude of the trough 5 also decreases (because it is a resonant drive), and when the vertical acceleration component is 1 g or more, the transfer speed is approximately proportional to the frequency x amplitude, but in this case Since the vertical acceleration component is less than 1 g, the material transfer speed becomes almost zero. In this state, the material in each trough 5 is heated and dried by hot air for a predetermined period of time.

After a predetermined period of time has elapsed, the gate drive unit is driven and the gate 40 is opened as shown by the two-dot chain line in FIG. Next, the driving of the electric motor 30 is stopped, and the driving of the other electric motor 19 is started again. This causes the trough 5 to vibrate at a high frequency, increasing the material transfer speed, and the material is quickly transferred in the direction of the arrow and outward from the opening near the right end of the trough 5 in the vibrating conveyor section 1. It is discharged.
When all the materials are discharged from each trough 5, the gate 40 is closed, the material is introduced from the supply port 7, and the same operation as described above is repeated.

In the above operation, in order to stop the transfer of the material, only one of the electric motors 19 and 30 is driven without stopping the electric motors 19 and 30, and the trough 5 is still vibrated. If both 19 and 30 are stopped, the vibration of the trough 5 will also be stopped, and when the trough 5 is started again to transfer the material, a force will be applied to the trough 5 and each part. However, according to this embodiment, it is possible to avoid the impact force caused by such activation when discharging the material, and the mechanical life of the device can be extended compared to the conventional method. Furthermore, if the excitation source is a single electric motor and an inverter is used to reduce the vibration frequency as in the past, the cost will be high, but in this embodiment, only one more electric motor and a pulley etc. are added. This can significantly reduce costs.

In addition, in the above embodiment, the transfer speed was set to two levels, a certain size and zero, but
It may be done in two stages (fast-slow). In this case, if the diameter of the large-diameter second pulley 37 on the motor 30 side is made slightly smaller to increase the rotation speed, the vertical acceleration component can be reduced to 1 even when only this motor 30 is driven.
g or more, and the material is transferred, albeit at a small speed. Therefore, the material is heated and dried while being slowly circulated through the vibrating conveyor sections 1 to 4. In this case, only the vibrating conveyor section 1 can be heated and dried, so the structure for heating and drying (for example, the air pipe 60 and the manifold 1)
0) can be omitted from each conveyor section 2-4 and still be simplified.

Further, even if the transfer speed is zero, the trough 5 is still vibrating, so fluidization is promoted compared to when it is stopped, and heat exchange with the hot air can be made easier.

Although the embodiments of the present invention have been described above, the present invention is of course not limited thereto, and various modifications can be made based on the technical idea of the present invention.

For example, although the above embodiments show the case of heat drying, the present invention is also applicable to other material treatments such as cooling and sterilization.

Furthermore, in the above embodiment, after startup, one electric motor 3
Although the drive of the conveyor belt 0 has been stopped, the drive may be continued until the material is distributed over all the vibrating conveyor sections 1 to 4. Furthermore, in the above embodiment, the driving of the electric motor 19 is stopped after the material has spread to all the vibrating conveyor sections 1 to 4, and the material processing is thereafter performed by driving only the electric motor 30. After the material reaches the vibrating conveyors 1 to 4, the driving of the electric motor 30 may be stopped and the material processing may be performed by driving the electric motor 19. Both electric motors may also be driven during material discharge.

〔Effect of the invention〕

As described above, according to the circulating vibration conveyor of the present invention, it is possible to reduce energy consumption as much as possible, and to minimize the number of times it is subjected to impact force at startup, thereby extending its mechanical life. .

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the arrangement of a circulating vibrating conveyor according to an embodiment of the present invention, and FIG. 2 is a plan view showing details of one vibrating conveyor section in FIG.
A partially cutaway side view in the linear direction and FIG. 3 are a partially cutaway plan view of the same. In the figure, 1 to 4... vibrating conveyor section,
5...Trough, 7...Material supply port, 8,52,5
4,56...Material discharge port, 12...Spring (elastic means), 18...Counterweight, 19,30...
...Electric motor, 21,36...Belt, 31,35...
...Small pulley, 32...First pulley, 33...Crankshaft, 37...Second pulley.

Claims (1)

[Scope of Claims] 1. A trough provided with a material transfer path, a counterweight disposed below the trough, an elastic means for coupling the trough and the counterweight, and an elastic means disposed on the counterweight. two drive motors, a crankshaft that converts the rotational motion of these drive motors into linear motion, one pulley having the same diameter and supported by the drive shafts of the two drive motors; The other first pulley and the other second pulley are supported and have different diameters from each other, and each belt is wound between the first and second pulleys and the one pulley, and the straight line of the crankshaft. a vibrating conveyor section comprising a transmission means for transmitting kinetic force to the trough;
A plurality of vibrating conveyors are arranged in a closed loop, and a material supply port and/or a material discharge port that can be opened and closed are formed in one of these vibrating conveyor sections. and the drive motor connected to both of the drive motors or the first pulley from the time of steady vibration of the trough until the material input from the material supply port is distributed throughout the plurality of vibrating conveyor sections. After the material is distributed throughout the plurality of vibrating conveyors, one of the drive motors is stopped, and the other drive motor is driven to carry out predetermined material processing. After the predetermined material processing, the material discharge port is opened, and the drive motor to which at least the first pulley having the smaller diameter is connected is driven to remove the material from the plurality of vibrating conveyor sections. A circulating vibration conveyor characterized in that the material is discharged to the outside. 2. Claim 1, wherein stopping one of the drive motors involves stopping the drive motor connected to the first pulley having the smaller diameter.
Circulating vibration conveyor described in.