JPH107256A - One-sided run correction device for belt feeder of fixed quantity picking machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct one-sided run of a belt for a belt feeder automatically by displacing one bearing of a driven pulley in the longitudinal direction based on a detection signal from the one-sided run detector of a feeder belt. SOLUTION: If a belt 7 is one-sided to the right, this is detected by an one- sided run detector 14a on the right side, and its detection signal is transmitted to a controller 15. The controller 15 displaces a left bearing 9b by a fixed distance rearwards to control driving a special motor 13. The left bearing 9b displaced by the fixed distance rearwards, and the shaft of a tail pulley 6 inclines by a fixed angle rearwards with a right bearing 9a serving as a fulcrum to correct the one-sided run of the belt 7. If the belt 7 is one-sided to the left, this is detected by a left one-sided run detector 14b to correct the one-sided run of the belt 7 in the same way as for rightward-sided run. In the above way, automatic correction can conducted. It is thus possible to eliminate manual one-sided run correction work for a belt feeder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for correcting a deviation of a belt feeder for quantitatively cutting a powder or granular material from a material tank.

[0002]

2. Description of the Related Art In a device for quantitatively cutting a sintering raw material from a blending tank by a belt feeder, when a shelf is suspended in the blending tank, the belt feeder is in a no-load state, the belt speed rises rapidly, and the belt runs. Becomes unstable, and the feeder belt shifts. In addition, misalignment occurs due to defective shape of the feeder belt, raw material adheres to the return roller or pulley, or misalignment occurs due to a lump of powder or the like biting between the belt and the pulley,
The frequency of belt misalignment is higher than that of a normal belt conveyor.

[0003] To correct the deviation of the belt of the belt feeder,
Using the screw take-up for adjusting the belt tension shown in FIG. 5, the following is performed. The lever 24 of one of the left and right bearings 22 of the tail pulley 20 is manually rotated to rotate the screw shaft 23. As a result, the bearing 22 is slightly displaced in the longitudinal direction of the machine along the guide 21 and the axis of the tail pulley is slightly inclined with respect to the left-right direction to correct the deviation of the belt. However, the belt speed of the belt feeder is 10 to 30 m / mi.
n and 100 to 150m of a normal material conveyor belt conveyor
/ Min is extremely slow compared to / min, it takes a long time to determine the result of the offset correction, and there are many compounding tanks.
It takes a long time to correct the deviation. For this reason, there is a demand for the development of a device that can automatically correct such a deviation of the belt feeder.

[0004] Various types of conveyor belt correction devices have been proposed or implemented. For example, the pulley of the belt conveyor is set at a middle height so that the belt always winds around the center (Chakushobo S54 / 1)
Published on March 30, edited by the Japan Mining Association, "Planning and Management of a New Belt Conveyor", page 168: Conventional technology 1), the force to shift the belt by the self-aligning roller to the movable bed, and correct the shift force (See "Planning and Management of a New Belt Conveyor", pp. 148-149: Conventional Technique 2).

[0005]

However, even if a pulley as in the prior art 1 is used, the grain size is small (grain size: 8 mm or less, average grain size: 1.40) like a sintering raw material.
In the case of transporting a highly adherent raw material containing a suitable amount of water, the effect of preventing the displacement is lost in a short time due to the adhesion of the raw material to the pulley.

The self-aligning roller of the prior art 2 is usually used for a conveyor belt having a long roller length of several tens of meters or more and having a long roller interval and a high speed. m, and a belt conveyor having a small roller interval and a low speed has no space for mounting the self-aligning roller.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device which can automatically correct the deviation of a belt of a belt feeder without manual operation.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus for correcting displacement of a belt feeder, which quantitatively cuts out powder or granular material from a raw material tank. This is achieved by a belt feeder displacement correcting device provided with means for displacing one bearing of the driven pulley in the front-rear direction based on a detection signal from the displacement detector.

[Operation] As shown in FIG. 3, when the belt 7 is deviated rightward as indicated by a broken line, the right-side deviation detector 14
When a detects a deviation and the left bearing 9b of the tail pulley (driven pulley) 6 is displaced forward (in the direction of arrow B) by a predetermined distance according to the signal, the axial center of the tail pulley 6 becomes as shown in FIG. Incline forward with the right bearing 9a (fixed) as a fulcrum. As a result, the belt 7 moves in the left direction (arrow L
In the direction) to correct the deviation.

Conversely, as shown in FIG. 4, when the belt 7 is deviated leftward as shown by the broken line, the left-side deviation detector 14
b detects the deviation, and when the left bearing 9b of the tail pulley (driven pulley) 6 is displaced rearward (in the direction of arrow A) by a predetermined distance according to the signal, when the axial center of the tail pulley 6 becomes like B, It is inclined rearward with the right bearing 9a (fixed) as a fulcrum. As a result, the belt 7 moves in the right direction (arrow R).
In the direction) to correct the deviation.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a belt feeder for cutting fine iron ore to which the present invention is applied, and FIG. 2 is a plan view showing a configuration of the apparatus of the present invention. 1 is a compounding tank for storing fine iron ore, 2 is a belt feeder, 3 is a scale conveyor for weighing fine iron ore cut by the belt feeder 2, and 4 is a weighing device. The fine iron ore in the mixing tank 1
And weighed by the weighing device 4 of the scale conveyor 3. Then, the belt speeds of the belt feeder 2 and the scale conveyor 3 are increased or decreased according to the deviation between the target cutout amount and the weighed value, and the target cutout amount of the fine iron ore is discharged to a belt conveyor (not shown).

In the above-described equipment, the present invention is applied to a belt feeder 2 having a large amount of belt deviation. 1 and 2, the belt feeder 2 is configured such that a belt 7 is wound around a head pulley (drive) 5 and a tail pulley (driven) 6. The head pulley 5 is supported by bearings 5a and 5b, and the tail pulley 6 is supported by bearings 9a and 9b. The bearings 9b, 9a on both the left and right sides of the tail pulley 6 are mounted so as to be movable in the front-rear direction by slide guides 8b, 8a. The right bearing 9a is connected to a screw shaft which is manually turned, but is moved back and forth only when adjusting the belt tension at the time of belt replacement, but is usually fixed at a fixed position.

The front end of the screw shaft 10 is connected to the left bearing 9b, and the rear end is engaged with the nut of the nut block 11. The nut block 11 is connected to a special motor 13 via a shaft coupling 12. This special motor 1
Numeral 3 is mainly used for operating a damper of the blower, is capable of rotating forward and reverse, and has a speed reducer. Also,
This motor is small and requires little installation space.
It is used for slow fine movement operations such as opening and closing valves that are frequently started.

Therefore, the left bearing 9b is connected to the special motor 1
3. The nut block 11 and the screw shaft 10 can make a small displacement in the front-rear direction. Thereby, the shaft of the tail pulley 6 can be inclined in the front-rear direction with the right bearing 9a as a fulcrum. Self-aligning bearings are used for the left and right bearings 9a and 9b in order to allow the tail pulley 6 to tilt.
A belt shift detector (eg, a limit switch) near both sides of the belt 7 at a position from the head of the belt feeder 2
14a and 14b are provided.

The correction of the deviation of the belt is performed as follows. In FIG. 2, when the belt 7 is shifted to the right, the shift detector 14 a on the right side detects the shift, and the detection signal is transmitted to the controller 15. The controller 15 controls the left bearing 9b.
The drive of the special motor 13 is controlled in order to displace the rearward by a predetermined distance. The left bearing 9b is displaced rearward by a certain distance, and the shaft of the tail pulley 6 is inclined rearward by a certain angle about the right bearing 9a as a fulcrum, thereby correcting the belt deviation.

When the belt 7 is shifted to the left, it is detected by the right shift detector 14b, and the detection signal is transmitted to the controller 15. The controller 15 controls the driving of the special motor 13 to displace the left bearing 9b forward by a certain distance. The left bearing 9b is displaced forward by a fixed distance, and the shaft of the tail pulley 6 is inclined forward by a fixed angle with the right bearing 9a as a fulcrum, thereby correcting the belt deviation.

[0017]

EXAMPLE The apparatus of the present invention was mounted on a belt feeder 2 for cutting fine iron ore with a cut-out amount of 50 to 250 t / hr from a mixing tank 1 having a capacity of 400 m ³ and a maximum storage amount of 800 t. There are five mixing tanks 1, and five belt feeders 2 are provided. The belt feeder 2 has a belt length of 2.0 m, a belt width of 1.2 m, and a belt speed of 11 to 30 m / min.
It is. The maximum torque of the special motor 13 is 50 kg
−m.

Before the offset correcting device of the present invention is installed, the offset is generated twice on average in each compounding tank per day.
Each time a person turns the nut of the screw shaft for adjusting belt tension attached to the tail pulley with a spanner,
Although the offset was corrected over a period of 0 minutes, after the device of the present invention was attached, even if the offset occurred, the offset of the belt was automatically corrected. There was no correction of belt deviation.

[0019]

According to the present invention, the belt shift is automatically corrected by tilting the axis of the tail pulley based on the detection signal of the belt shift detector, so that the shift of the belt feeder can be corrected manually. Work can be completely eliminated.

[Brief description of the drawings]

FIG. 1 is a side view of a belt feeder for cutting fine iron ore to which the present invention is applied.

FIG. 2 is a plan view showing the configuration of the device of the present invention.

FIG. 3 is an explanatory diagram of a correction of a shift when the belt is shifted to the right by the device of the present invention.

FIG. 4 is an explanatory diagram of correction of a shift when the belt is shifted leftward by the apparatus of the present invention.

FIG. 5 is an explanatory diagram of correction of belt deviation in a conventional belt feeder.

[Explanation of symbols]

 Reference Signs List 1 compounding tank 2 belt feeder 5 head pulley 6 tail pulley 7 belt 8a, 8b slide guide 9a, 9b bearing 10 screw shaft 11 nut block 11a nut 13 special motor 14a, 14b displacement detector 15 controller

Claims (1)

[Claims] An apparatus for correcting deviation of a belt feeder for quantitatively cutting out powder or granular material from a material tank, comprising:
A feeder belt offset detector, and a means for displacing one of the driven pulley bearings in the front-rear direction based on a detection signal from the offset detector; Offset correction device.