JPH0694283B2 - Belt conveyor meandering control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to pig iron ore, coal, and other mining sites,
The present invention relates to a belt conveyor used for conveying ore, raw materials and the like in steelworks and the like, and more specifically, to a device for controlling meandering by a single load of the belt conveyor.

[Conventional technology]

In a belt conveyor facility, a material to be conveyed is conveyed via a belt conveyor of several stages.

At the time of transferring the conveyed product between the belt conveyors, the conveyed product continuously drops and is supplied to the downstream side belt conveyor at the chute part which is the belt conveyor continuation part, but this conveyed product is a cross section of the conveyor belt of the downstream side belt conveyor. When mounted on the center, that is, on the left or right side of the center of the transport path, the meandering of the running conveyor belt occurs due to the lateral deviation of the load on the conveyor belt.

This will be described with reference to FIG. 8. A chute portion 23 is provided at a place where the upstream belt conveyor 16A and the downstream belt conveyor 16 are connected, and the conveying direction can be changed at this connecting portion. . This upstream belt conveyor 16
When the transported article H is transferred from A to the downstream belt conveyor 16 as shown in FIG. 11 (a), if the transported article H is mounted on the front belt B1 with an offset, that is, if a single load occurs. , Front belt B1 is tail pulley 17 to head pulley 18
11 (b) and 11 (c), the weight of the conveyed article H causes the side carrier rollers 19a of the plurality of carrier rollers 19 to move in the opposite direction to the opposite side of the single load side. It is offset by the offset amount S. When the front belt B1 is offset in this way, the belt B is rubbed by the chute side plate 23a of the chute portion 23 on the head pulley 18 side and the like, and as shown in FIG. Is generated, or a flame is generated due to frictional heat.

One side of the belt B is one side of the front belt B1 and the other side is the back belt.
There is a deviation of B2, and if the deviation of the front belt B1 is corrected, as a conventional technique, for example, an aligning carrier roller body 24 (see FIG. 9) disclosed in Japanese Patent Laid-Open No. 50-52781 is used. As a conventional technique for correcting the deviation of the back belt B2, there is known a technique utilizing an aligning return roller body 27 (see FIG. 10) disclosed in JP-A-60-153324. ing.

The centering carrier roller body 24 has a pair of side carrier rollers 19a inclined in opposite directions and a center carrier roller 19b arranged between the side carrier rollers 19a, which are rotatably assembled on a frame 20. 20 is rotatably assembled on the beam 6 around a rotary shaft 26 having a vertical axis, and the side rollers 25 are opposed to both side carrier rollers 19a on the outside of the front belt B1. Is provided. Similarly, aligning return roller body
27 is a return roller 21 that supports the back belt B2 from below.
Is rotatably assembled on the pedestal 22, and this pedestal 22 is rotatably assembled on the beam 6 about a rotary shaft 29 having a vertical axis.
Further, side rollers 28 are provided on both sides of the return roller 21 so as to face the back belt B2 at the folds.

As shown in FIG. 12, in the aligning carrier roller body 24 and the aligning return roller body 27, when the belt B is deviated, the edging portion of the belt B abuts against the side roller 25 or 28, and the side roller 25 or The alignment carrier roller body 24 or the alignment return roller body 27 is tilted in the direction of correcting the deviation with respect to the conveying direction by the contact of the squeezed portion of the belt B with the deviation of the belt B. To fix.

[Problems to be Solved by the Invention]

However, the above-described conventional belt deviation correction technique cannot reliably correct the deviation due to a load, and for example, the side roller 25 or 28 is dropped, and the missing portion C is generated, so that the aligning function is adjusted. That is, there is a serious problem that not only the deviation correction function is lost but also the deviation is promoted.

Further, if the belt B is wet due to rain, water sprinkling, etc., the coefficient of friction between the belt B and each roller is lowered, and the aligning function is halved.

In particular, the belt B already in use has a larger or smaller missing portion C.
Therefore, it is difficult to carry out the above-described conventional technique in a preferable state, and the side roller 25 or 28 for detecting the deviation of the belt B rotates at a high speed due to the contact with the belt B and has a strong force. Since the pressing force is received, the durability is short, and if the side roller 25 or 28 is damaged, the deviation of the side roller 25 is promoted, and the belt B is damaged and a large amount of mine is produced at once.

Therefore, the present invention was devised to solve the above-mentioned problems in the prior art, and in order to prevent the occurrence of deviation of the belt due to unilateral load, the unilateral load of the conveyed product against the belt is set to the belt width. The object of the present invention is to detect the weight balance of left and right conveyed objects in the direction and prevent the occurrence of deviation of the belt according to the balance of the conveyed object weight.

[Means for Solving the Problems]

Means of the present invention for achieving the above object is to detect a load of a conveyed product on a front belt at a position immediately downstream of a loading point, and to detect an unbalanced load of a belt according to a degree of the detected load of a conveyed product. The basic concept is to increase the degree of pulling of the side parts, and a pair of side support rollers arranged in the form of supporting the front belt immediately downstream of the loading point and inclined in the opposite direction are provided between the side support rollers. The center belt has a load balance detection roller body that is composed of a center support roller and a front belt that is wound around both side support rollers. The balance detection roller body has a front side rotation shaft assembled so as to be swingable in the width direction of the front belt.

In this constitution means, there is provided a guide roller body facing the load balance detection roller body as a tension roller with respect to the back belt and comprising a pair of guide rollers inclined in opposite directions. The guide roller body is arranged in parallel and has a backside rotation shaft in which the guide roller body is swingably displaced in the width direction of the back belt, and the load balance detection roller body and the guide roller body are gear-coupled. It is desirable to add.

Furthermore, a load detector is provided on each of the supporting portions of both side support rollers of the load balance detection roller body, and a swing drive source for swinging and tilting the load balance detection roller body according to the difference between detection signals of the load detector is provided. Is good.

[Action]

If the loading point of the conveyed product on the front belt of the belt conveyor is aligned with the center of the conveyance path, the load of the conveyed product on the load balance detection roller body is even on the left and right, and not the single load. The body behaves the same as the carrier roller.

If the loading point of the transported object shifts to the left or right from the center of the transport path and a single load occurs, the load of the transported object on both side support rollers of the load balance detection roller body becomes unbalanced, and the side support rollers on the single load side. Will result in a larger load. In this way, when the load of the conveyed product acting on both side support rollers becomes unbalanced, the load balance detection body is not operated due to the difference in the pushing force caused by the load or the action of the swing drive source due to the difference in the load. , The single-displacement side is lowered around the front-side rotation axis, and the opposite-side single-load side is raised to perform the swing displacement. This swing displacement of the load balance detector causes the side support roller on the side opposite to the single load to increase its inclination angle, which increases the tensile force acting on the side opposite to the single load of the front belt. The belt is displaced toward the single side with respect to the center of the conveying path. Due to the displacement of the front belt, the loading point is aligned with the center of the front belt in the width direction.

In this way, even if the loading point of the conveyed object is deviated from the center of the conveying path, the loading point can be aligned with the center of the front belt in the width direction, so that no one-sided load is generated on the front belt. The deviation of the front belt is always prevented continuously.

When the guide roller body that functions as the tension roller of the back belt is provided, the displacement action of the belt on the single-load side acts not only on the front belt but also on the back belt.
The displacement of the belt toward the single-load side can be achieved more quickly.

When the load balance detection roller body and the guide roller body are forcibly oscillated and displaced by the oscillating drive source based on the detection result of the load detector, the amount of conveyed goods per unit time, that is, the front belt is applied. The load balance detection roller body and the guide roller body can be oscillated and displaced by a desired amount regardless of the change in the belt tension caused by the change in the applied load.

〔Example〕

An embodiment of a conveyor belt aligning device according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a basic overall structure of a belt conveyor 16 to which a conveyor belt aligning device 1 according to the present invention is attached. A belt B is provided between a tail pulley 17 and a head pulley 18.
And the front belt B1 is supported by a large number of carrier rollers 19 and the back belt B2 is also supported by a return roller 21. The head pulley 18 side portion, that is, the carry-out side portion, drops and supplies the conveyed product H. A chute unit 23 for controlling the direction is provided.

The conveyor belt aligning device 1 attached to the belt conveyor 16 includes a load balance detecting roller body 2 functioning as a carrier roller arranged immediately downstream of the loading point R, and a load balance detecting roller body 2 facing the load balance detecting roller body 2. The guide roller body 3 is disposed and functions as a tension roller with respect to the back belt B2.

(See FIG. 3 below) The load balance detection roller body 2 is
Like the carrier roller 19, it is composed of a pair of side support rollers 2a inclined in opposite directions and a center support roller 2b arranged between the side support rollers 2a. The rollers 2a and 2b are mounted on the mounting base 4a. It is rotatably mounted on the top. The mounting pedestal 4 is mounted right below the center of the center support roller 2b, that is, directly below the center O of the conveyance path, on the front side of the shaft which is attached to the beam 6 which is a fixed portion along the conveyance path via the bearing 5. The movable shaft 7 is attached so as to be swingable.

The guide roller body 3 is composed of a pair of guide rollers 3a inclined in opposite directions in a manner of increasing the tension on both sides of the back belt B2, and both guide rollers 3a are rotatable below the support frame 9. Installed on. Support stand 9
Is a back side rotating shaft 11 mounted directly below the front side rotating shaft 7 in parallel with the front side rotating shaft 7 on the beam 6 via a bearing 10. It is mounted so that it can be swung.

In the case of the embodiment shown in FIG. 3, the load balance detection roller body 2
The detection side gear 8 is attached to the side, and the guide side gear 12 is attached to the side of the guide roller body 3 as well, and both the gears 8 and 12 are directly meshed with each other. Therefore, when the load balance detection roller body 2 swings and displaces in one direction around the front side rotation shaft 7, the load displacement detection roller body 2 swings and displaces the guide roller body 3 in the other opposite direction. Displace. Therefore, as shown in FIG. 2, when the loading point R of the conveyed product H on the front belt B1 deviates from the center O of the conveying path and a unilateral load occurs, the unilateral load of the conveyed product H causes load balance detection. A larger load of the conveyed product H is applied to the side support roller 2a on the single side of the roller body 2, so that the load balance detection roller body 2 receives the single side load with the front side rotation shaft 7 as an axis as shown in FIG. Since the side support roller 2a on the side opposite to the single load side is displaced upward by swinging in the direction of lowering the side, the tensile force applied to the front belt B1 on the side opposite to the single load side is increased. In this way, when the load balance detection roller body 2 is oscillated and displaced in a direction in which the tension acting on the opposite side of the front belt B1 is increased, the guide roller body 3 coupled to the load balance detection roller body 2 is formed. Is oscillated and displaced in the direction opposite to the load balance detection roller body 2, that is, in the direction in which the tensile force acting on the opposite side of the back belt B2 is increased. , Belt B
Achieve both sides simultaneously.

In the embodiment shown in FIG. 3, the stopper 13 provided on the beam 6 is for setting the tilt limit of the load balance detection roller body 2 which is rocked and tilted by the load of the conveyed object H.

The detection side gear 8 and the guide side gear 12 need to be integrally attached to the mounting base 4 or the support base 9, but the mounting structure is not limited, and as in the embodiment shown in FIG. If the mounting base 4 (same for the support base 9) is fixed to the front side rotation shaft 7 (same for the back side rotation shaft 11), it may be provided on the front side rotation shaft 7, or As shown in the figure, it may be provided directly on the mounting base 4.

In the embodiment shown in FIG. 7, the swing balance tilt of the load balance detection roller body 2 corresponding to a single load of the transported material H is not caused by the load gravity of the transported material H, but is a dedicated swing tilt motion source. The oscillating drive source 15 is configured to be compulsorily achieved. That is, the load detectors 14 such as load cells are installed in the bearing portions outside the both side support rollers 2a of the load balance detection roller body 2, and the swing using a power cylinder or the like is performed according to the difference between the outputs of both load detectors 14. The operation direction and the operation amount of the drive source 15 are determined, and the load balance detection roller body 2 is forcibly rocked and inclined. This 7th
In the case of the illustrated embodiment, the load balance detection roller body 2 can be reliably rocked and tilted even when a large amount of conveyed articles H are mounted on the front belt B1 and a high tension is applied to the belt B. Therefore, it is possible to surely obtain the belt B traveling path correcting action.

〔The invention's effect〕

Since the present invention has the above-mentioned configuration, it has the following effects.

At the same time that the load of the conveyed product is generated, the load is detected and the load is eliminated, so that the meandering of the belt due to the load of the transferred product can be prevented in advance.

Since the detection of the unbalanced load and the operation of canceling the unbalanced load can be the same, the response of the control operation is very good, and the configuration of the entire meandering control device can be made simple and simple.

Since the action of correcting the traveling path of the belt is achieved by adjusting and changing the tension acting on both sides of the belt, instead of exerting the pressing force from the side by the side rollers as in the conventional case, The strong external force does not act on the belt, which not only prevents damage to the belt, but also eliminates the need for side rollers that are easily damaged, thus providing a safe, stable and reliable control operation. be able to. Further, since the action of correcting the traveling path of the belt is achieved by adjusting the tension on the belt, the reduction of the coefficient of friction between the belt and the roller due to rainfall or the like does not affect the control action, and stable operation is obtained. I can do it.

Since the one-sided load detection is achieved by the difference between the loads applied to the both side support rollers of the load balance detection roller body, the one-sided load can be detected regardless of the amount of the conveyed object.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of the overall configuration of a belt conveyor embodying the present invention. FIG. 2 is a plan view of a loading point portion of a belt conveyor embodying the present invention. FIG. 3 is a front view showing the configuration of an embodiment of the device of the present invention. FIG. 4 is an explanatory diagram of the correction operation in the embodiment shown in FIG. FIG. 5 is a side view showing a configuration example of a combination of the mounting base, the front side rotation shaft and the detection side gear, and FIG. 6 is a side view showing another configuration example. FIG. 7 is a front view showing the configuration of another embodiment of the device of the present invention in which the swing balance of the load balance detection roller body corresponding to a single load is forcibly performed by a dedicated swing drive source. FIG. 8 is an explanatory view showing a mounting positional relationship of a conventional meandering correction device mounted on a belt conveyor. FIG. 9 is a front view showing a configuration example of a conventional meandering correction device for a front belt. FIG. 10 is a front view showing a configuration example of a conventional meandering correction device for a back belt. FIG. 11 is an explanatory diagram of belt meandering caused by a single load of a conveyed product. FIG. 12 is a diagram for explaining the operation of the conventional meandering correction device. FIG. 13 shows the lack of the belt belt,
It is a figure for demonstrating that the conventional apparatus becomes uncontrollable due to this omission. DESCRIPTION OF SYMBOLS 1; Conveyor belt alignment device, 2; Load balance detection roller body, 2a; Side support roller, 2b; Center support roller, 3;
Guide roller body, 3a; Guide roller, 4; Mounting frame, 5; Bearing,
6; Beam, 7; Front side rotation axis, 8; Detection side gear, 9; Support mount, 10;
Bearing, 11; Back side rotating shaft, 12; Guide side gear, 13; Stopper, 1
4; load detector, 15; swing drive source, 16; belt conveyor, 1
7; Tail pulley, 18; Head pulley, 19; Carrier roller, 19a; Side carrier roller, 19b; Center carrier roller, 20; Frame, 21; Return roller, 22; Frame, 23; Chute part, 23a; Chute side plate, 24 Aligning carrier roller body, 25; side roller, 26; rotating shaft, 27; aligning return roller body, 28; side roller, 29; rotating shaft, B; belt, B1;
Front belt, B2; Back belt, H; Transported goods, O; Transport path center, R;
Loading point, Θ: Trough angle, C: Missing, S: Offset amount.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-89508 (JP, A) JP-A-63-185714 (JP, A) Actually open Sho-62-2520 (JP, U) Actual-open Sho-55- 160308 (JP, U) Actual opening Sho 53-101679 (JP, U) Actual opening Sho 60-130216 (JP, U)

Claims (3)

[Claims] 1. A pair of side support rollers (2a) arranged in a form of supporting a front belt (B1) immediately downstream of a loading point (R), and between the side support rollers (2a). A center support roller (2b), and the front belt (B1) is wound around the side support rollers (2a) around the load balance detection roller body (2). (2b) By the front side rotation shaft (7) arranged immediately below along the transport direction,
A belt conveyor meandering control device mounted so that it can be oscillated in the width direction of the front belt (B1). 2. A pair of side support rollers (2a) arranged to support the front belt (B1) immediately downstream of the loading point (R) and inclined in opposite directions, and between the side support rollers (2a). A center support roller (2b), and the front belt (B1) is wound around the side support rollers (2a) around the load balance detection roller body (2). (2b) By the front side rotation shaft (7) arranged immediately below along the transport direction,
A pair of front belts (B1) mounted so as to be swingable in the width direction, and arranged to face the load balance detection roller body (2) to apply tension to the back belt (B2) and inclined in opposite directions. The guide roller body (3) composed of the guide roller (3a) is shaken in the width direction of the back belt (B2) by the back side rotation shaft (11) arranged in parallel directly below the front side rotation shaft (7). A meandering control device for a belt conveyor, which is mounted so as to be dynamically displaceable, and in which the load balance detecting roller body (2) and the guide roller body (3) are gear-coupled. 3. A load detector (14) is provided on each of the supporting portions of both side support rollers (2a) of the load balance detection roller body (2), and the load detectors (14) are provided in accordance with the difference between the detection outputs of the load detectors (14). 3. The meandering control device for a belt conveyor according to claim 1, further comprising a swing drive source (15) for swinging and tilting the load balance detection roller body (2).