JP3089839B2 - Table feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention turns a load
The table to be carried out to the exit chute provided on the outer periphery of the table
It is about bull feeders .

[0002]

2. Description of the Related Art Generally, an unloader, which is known as a cargo handling device for bulk materials such as coal, is used to transfer bulk materials from a bucket elevator that vertically transports bulk materials to a boom conveyor that transports the bulk materials to the land side, as shown in FIGS. A table feeder as shown in FIG.

As shown in the figure, this table feeder 1
Has a flat ring-shaped turntable 3 that is supported on rollers 4 and turns horizontally so as to surround the middle of the bucket elevator 2 . A hydraulic motor 5 for horizontally turning the turntable 3 is provided on the inner peripheral side of the turntable 3. The turntable 3 is connected to an inlet-side chute 6 for receiving loose objects from the bucket elevator 2 and an outlet-side chute 7 for feeding loose objects to a boom conveyor (not shown) with the bucket elevator 2 interposed therebetween.

[0004] As shown in FIG.
Is open in a U-shaped cross section over the entire circumference facing outward in the radial direction, and the opening 8 is closed and sealed by an endless flat belt 9. The belt 9 is wound around the outer periphery of the turntable 3 along the circumferential direction, and is folded in a substantially U-shape above the outlet side chute 7 to open the opening 8 of the turntable 3. . That is, a scraper 11 that extends obliquely into the turntable 3 and guides loose items to the exit-side chute 7 is provided above the exit-side chute 7 and also guides the belt 9 by folding the belt 9 in a substantially U-shape. Four pulleys 12, 13, 14, 15 are provided. The pulley 13 rotatably supported by the arm 16 among the pulleys 12 to 15 adjusts the tension of the belt 9 by the expansion and contraction of the hydraulic cylinder 17.

[0005] Accordingly, the loose objects thrown into the entrance side chute 6 are held between the turntable 3 and the belt 9 and are turned and moved by turning the turntable 3.
Further, it is guided by the scraper 11 and carried out by the boom conveyor via the outlet side chute 7.

[0006]

By the way, the belt 9 wound around the outer periphery of the turntable 3 gradually starts to lean downward due to gravity. In order to prevent this deviation, rollers 18 are arranged below the belt 9 at predetermined intervals along the longitudinal direction of the belt. When the rollers 18 are arranged in this manner, the belt 9 is prevented from being offset, but the belt 9 is forcibly restricted, so that the lower end in the width direction of the belt 9 that contacts the roller 18 is damaged, There is a problem that the life of the belt 18 is shortened.

The present invention has been made to effectively solve the above problems.

An object of the present invention is to provide a belt automatic alignment apparatus which can achieve a long life of the belt and can easily perform alignment of the belt.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a turntable.
Loads such as loose items supplied on the turntable outside the turntable
A table for carrying out to the exit chute provided around
The outer circumference of the turntable is covered with a tube
Turntable at the position of the exit side chute
Endless flatbed that is detoured to open the outer circumference of the
Detection to detect the tilt of the endless flat belt
A sensor and a detour part of the endless flat belt,
According to the deviation from the detection sensor, the endless flat belt
And a tiltable pulley that can be tilted to adjust the deviation .

[0010]

[Action] in this way to detect the deviation of Mutantaira belt, no
The pulley that guides the end flat belt is tilted for self- alignment, so that the life of the endless flat belt can be extended and the endless flat belt can be achieved.
Alignment of the flat belt can be easily performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

[0012] Figures 4 and 5, is shown an automatic alignment device for a belt employed in the table feeder unloader, bucket elevator 21 and rose product for vertical transport rose was the unloader as shown Feeder 23 connecting boom conveyor 22 for transporting
Is provided.

The table feeder 23 has a flat ring-shaped turntable 24 which horizontally turns so as to surround the middle of the bucket elevator 21. On the inner peripheral side of the turntable 24, a hydraulic pressure for horizontally turning the turntable 24 is provided. A motor 25 is provided. Turntable 24
The entrance-side chute 26 receives the bulk from the bucket elevator 21 on both sides of the bucket elevator 21.
Are connected and an outlet chute 27 for feeding loose objects to the boom conveyor 22 is connected.

The outer periphery of the turntable 24 faces outward in the radial direction and is open in a U-shaped cross section over the entire periphery.
The opening 28 is closed and sealed by an endless flat belt 29. The belt 29 is wound around the outer periphery of the turntable 24 along the circumferential direction, and is folded back in a substantially U-shape at the upper part of the exit-side chute 27 to bypass the exit-side chute 27 and turn around the turntable 2.
The fourth opening 28 is opened. That is, the turntable 24 is located above the exit-side chute 27.
A frame 31 which is open in a U-shape is formed facing the front side. The frame 31 is provided with a scraper 32 which extends obliquely into the turntable 24 and guides loose items to the exit side chute 27. In addition, four pulleys 33 to 36 are provided to guide the belt 29 in a substantially U-shape. As shown in FIG.
The pulley 34 rotatably supported by the arm 37 out of 3 to 36 is configured to increase or decrease the tension of the belt 29 by expansion and contraction of a hydraulic cylinder 38 connected to the arm 37 as a take-up device.

In particular, a pulley 35 located rearward of the tension adjusting pulley 34 in the belt traveling direction is supported so as to be tiltable, and the pulley shaft 41 of the tilting pulley 35 is connected to the outlet side chute 27 as shown in FIG. The upper frame 31 is fixedly supported by the cantilever. Pulley shaft 41
Is extended in the axial direction, and the extended portion 42 is inserted into the frame 31 and is rotatably supported by a roller bearing 43 located above and a spherical roller bearing 44 located below it. A lever member (cantilever) 45 is connected to the roller bearing 43 that supports the upper portion of the pulley shaft 41 so as to cover the roller bearing 43. The lever member 45 has a holding portion 46 for holding the roller bearing 43 so as to cover the roller bearing 43 from above. The holding portion 46 has a rotation center eccentric with respect to the rotation center of the pulley shaft 41. That is, the holding unit 46
The radial thickness covering the roller bearing 43 is formed to be different. Therefore, when the lever member 45 is rotated horizontally, the pulley shaft 41 tilts the tilt pulley 35 right and left about the spherical roller bearing 44 while being held rotatably about the axis.

As shown in FIG. 1, a displacement detecting sensor 51 for detecting a displacement of the belt 29 in the width direction is provided between the tilting pulley 35 and the pulley 36 located rearward in the belt traveling direction. As shown in FIG. 3, the detection sensor 51 has a lifting rod 52 inserted into the frame 31. The lifting rod 52 is vertically moved by rollers 53, 54 with the belt 29 sandwiched from both sides in the width direction. Are provided in parallel. These rollers 53, 54 are arranged at predetermined intervals 55, 56 from the widthwise end of the belt 29. The rollers 53 and 54 are both held by a pair of parallel holding plates 57 and 58 and attached to the rod 52. Guide plates 59 and 61 for guiding the running of the belt 29 are provided on the holding plates 57 and 58, respectively. It is provided so as to oppose at a predetermined interval on both sides in the vertical direction. Wear-resistant portions 62 made of ultra-high-molecular-weight polyethylene having excellent wear resistance are formed on surfaces of the guide plates 59 and 61 facing each other.

The rod 52 extends above the frame 31, and its upper end is elastically supported by a spring 63 from the frame 31 side. A seat 64 for holding a spring 63 is formed on the upper portion of the rod 52 and the frame 3
A support base 65 for supporting a lower portion of a spring 63 is formed on the support base 1. The support base 65 has a pair of switches 66 such as a pair of remid switches or hydraulic level valves for detecting the elevation of the rod 52. , 67 are attached. These switches 66 and 67 are connected to the rod 52
The cam groove 68 is engaged with a cam groove 68 formed in the longitudinal direction. That is, these switches 66,
Rollers 69 and 71 provided at the tip of 67
8, the belt 29 is turned on to detect that the belt 29 has shifted, and the rollers 69 and 71
When the belt 29 is engaged, it is in the OFF state, and it is detected that the belt 29 is at the normal position.

The detection signals of these valves 69 and 71 are shown in FIG.
2, and is input to a hydraulic tilting cylinder 72 for rotating the lever member 45.
The cylinder 72 is fixed to the frame 31 and expands and contracts, thereby rotating the force applying portion 73 of the lever member 45 in the horizontal direction. That is, the hydraulic cylinder 7
Numeral 2 constitutes a tilting means 74 for tilting the tilt pulley 35 based on the detection signal of the displacement detection sensor 51.

Next, the operation of the above embodiment will be described.

As shown in FIG. 1, the belt 29 wound around the outer periphery of the turntable 24 travels while being guided by the tension adjusting pulley 34 and the tilting pulley 35 and the like. Start to drop. FIG.
As shown in FIG.
When the belt 29 further deviates downward beyond the permissible minute deviation amount forming a gap 56 between the roller 5 and the roller 5, the belt 29 contacts the roller 54 and pushes it down.
2 will also be pushed down. The upper switch 66 engaging with the cam groove 68 formed in the rod 52 is
2 moves upward from cam groove 68 due to upward movement of 2
In operation, the tilt cylinder 72 outputs that the belt 29 has moved further downward beyond the allowable minute deviation amount. The tilting cylinder 72 receiving the detection signal moves the tilting pulley 3
5 to tilt. Therefore,
While the upper switch 66 outputs the ON signal, the tilt cylinder 72 holds the tilt pulley 35 in a tilted state.

When tension is applied radially outward to either the widthwise upper end side or the widthwise lower end side of the belt 29,
The belt 29 moves to the side to which the tension is applied. Then, as shown in FIG. 2, it is detected that the belt 29 has moved downward, so that the tilting cylinder 72 tilts the pulley shaft 41 of the tilting pulley 35 to apply tension to the upper end of the belt 29 in the width direction. Become. When the tension is applied to the upper end side in the width direction of the belt 29, the belt 29 immediately moves upward. As shown in FIG. 3, when the belt 29 moves upward and separates from the lower roller 54, the rod 52 which has been lowered downward returns to the original position by the urging force of the spring 63. For this reason, the upper switch 66 returns to the inside of the cam groove 68 to be in the OFF state, the supply of the hydraulic pressure to the tilt cylinder 72 is stopped, and the tilt pulley 35 returns to the initial state. Therefore, when both the switches 66 and 67 are in the OFF state, it is assumed that the belt 29 is not deviated or a slight deviation can be tolerated, and no signal for centering is sent to the tilt cylinder 72. Will be.

The upper switch 66 for detecting a deviation
If frequent misalignment is detected in a short time, it means that the belt 29 or the guide system of the belt 29 has been damaged or abnormal. In this case, the running of the belt 29 is decelerated and stopped. For example, when the number of times of detection of the deviation exceeds the reference number within a predetermined time, an alarm is output.

As described above, the present invention detects the deviation of the belt 29 and tilts the pulley 35 for guiding the belt 29 to perform automatic alignment. Therefore, the alignment of the belt 29 can be easily performed and the length of the belt 29 can be easily adjusted. A longer life can be achieved. Further, since the automatic alignment is performed, the machine is not stopped for the alignment.

Although the vertical belt has been described in the above embodiment, the automatic alignment device of the present invention can be used for alignment of a horizontal belt, and is not limited to a sealing belt but may be a transport belt. Automatic alignment is also possible.

[0025]

In summary, according to the present invention, the endless flat belt can be easily centered and the life of the endless flat belt can be extended.

[Brief description of the drawings]

FIG. 1 is a plan view showing an automatic centering device for a belt employed in a table feeder.

FIG. 2 is a side sectional view showing a tilting pulley.

FIG. 3 is a side sectional view showing a displacement detection sensor.

FIG. 4 is a side sectional view showing a table feeder.

FIG. 5 is a plan view showing a table feeder.

FIG. 6 is a plan view showing a conventional table feeder.

FIG. 7 is a view taken along line XX of FIG. 6;

[Explanation of symbols]

 29 belt 35 tilting pulley 51 displacement detection sensor 74 tilting means

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-1-288523 (JP, A) JP-A-3-125722 (JP, U) JP-A-51-139585 (JP, U) JP-A 64-64 521 (JP, U) Japanese Utility Model 1-118923 (JP, U) Japanese Patent Publication No. 56-44849 (JP, B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 47/80 B65G 29 / 00 B65G 15/00-15/28 B65G 15/60-15/64

Claims (1)

(57) [Claims] 1. A loose object supplied on a turntable
Exit chute on the outer periphery of the turntable which load
In the table feeder for unloading
Is provided so as to cover the outer periphery of the cable in a cylindrical shape.
Open the outer periphery of the turntable at the
An endless flat belt provided in a detour, and the endless flat belt
A detection sensor for detecting vertical deviation and the endless flat bell
Provided at the detour of the
Tilt to adjust the offset of the endless flat belt according to the
A table provided with a freely tilting pulley
Feeder .