JPS5922806A - Device for preventing meandering motion of belt - Google Patents

Abstract

PURPOSE:To allow a meandering motion of a belt to be responsively corrected with simple and inexpensive constitution, by providing wheels supporting a belt so as to be directed reversely to the meandering direction and to be rotated in the horizontal direction, and mechanically connecting means for sensing the meandering action of the belt to the wheels. CONSTITUTION:When a belt 8 meanders to the left side with respect to an advancing direction of the belt, for example, a left side roller 10 is pushed by a side edge of the meandering belt 8, and is moved by the amount of such a meandering. As a result, an arm 7 is simultaneously rotated by the same angle of rotation of the side roller 10 through a rod 12, a turnbuckle 13 and a rod 11, and accordingly, a rocking cylinder 4 for supporting a wheel, which cylinder being formed integrally with the arm 7, is simultaneously rotated around a support shaft 2 in the same direction. As a result, wheels 5 and 6 are directed reversely to the meandering direction of the belt 8 to correct an advancing direction of the belt 8. After correction of the advancing direction of the belt 8, a support arm 9 of the side roller 10 is returned to its original position by means of a force of a spring 15, and accordingly each of the wheels 5 and 6 is also returned to its original direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a belt meandering prevention device that automatically aligns the belt when meandering occurs.

Belt meandering may occur due to various factors, such as how the load falls onto the belt from the chute, how the load is loaded onto the belt, or bending of the girder frame. Belt meandering causes many problems such as falling objects, noise, vibration, and equipment damage.

Therefore, when the belt meanders during operation of the belt conveyor, it is necessary to immediately correct the meandering and automatically align the belt.

Conventionally, the systems shown in FIGS. 1 and 2, or the system shown in FIG. 3 have been adopted as belt meandering prevention devices.

In the system shown in FIGS. 1 and 2, sensor rollers b are located on both sides of the belt a in the traveling direction, and a hydraulic pump C is directly connected to the sensor roller b, so that the belt a meanders and hits the sensor roller b. The hydraulic pump C is actuated by the contact, and the pressure oil from the hydraulic pump C is sent to the hydraulic cylinder d, and the direction of the plurality of rollers C supporting the belt a is changed by the operation of the hydraulic cylinder d. This is so that they can be changed at the same time, so that belt a can be aligned.

Further, in the method shown in FIG. 3, belt deviation switches g for meandering detection are located on both sides of the belt a in the traveling direction, and when the deviation of the belt is detected by the deviation switch g, it is taken out as an electrical signal. , the manual signal is sent to the balancing relay built into the automatic correction control panel, and the forward/reverse output signal from this balancing relay is sent to the servo drive i, causing the servo drive i to perform forward or reverse rotation. The belt a is aligned by changing the angle of the mechanically connected rollers J.

However, both of the above methods have problems in that they are structurally disadvantageous, expensive, and take up a large amount of space.
Also, since it uses hydraulics, electricity, etc., it has the drawback of requiring a large number of incidental equipment.

In particular, in the system shown in Fig. 1 and Fig. 2, the roller C is
Since it has a structure in which a rubber ring f is fitted into a pipe, the nod of the comb ring f to the core of the belt a is very small, resulting in low alignment response and the inability to easily install it on an existing conveyor. There is.

The first invention was made with the aim of eliminating the drawbacks of the conventional system and significantly reducing costs, saving energy, labor, and downsizing by significantly improving the mechanism.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 4 and 5, a plurality of wheel swing supports are provided at predetermined intervals on the roller mount 1 1III12
A substantially cross-shaped wheel swinging support tube 4, which is made upright vertically and horizontally extending the wheel shaft 3 to the left and right, is rotatably fitted to the support shaft 2, and each wheel swinging support rtJ4
Wheels 5 and 6 are rotatably attached to the wheels llh 3 extending left and right, and an arm 7 is attached to one side of each wheel swing support tube 4 on the 1riI vt side. On the other hand, the ends of side roller support arms 9 are horizontally rotatably attached to both ends of the roller mount 1 at intervals slightly wider than the width of the belt 8. 10 is rotatably attached, and the rods 11 are pivotally attached to the tips of the arms 7 so as to be able to rotate in the horizontal force direction, and the rods 12 are pivotably attached to the tips of the side roller support arms 9. The rods 11 are connected to each other by turnbuckles 13, and the arms 9 and each arm 7 are connected to each other by turnbuckles 13.
A spring 15 is interposed between the fixing member 14 fixed to the roller mount 1 and the side roller support arm 9 in order to support the roller mount 1 so that both of them are perpendicular to the longitudinal direction of the roller mount 1. The side roller support arm 9 is supported perpendicularly to the roller mount 1 by the action of the spring 15.

With the above configuration, the side roller support arm 9 is normally supported perpendicularly to the roller mount 1 by the spring 15, so that each wheel swing support shaft 2
A wheel 5 supported around the support tube 4,
6 all face in the traveling direction of the belt 8, and when the side roller support arm 9 rotates in one direction, the rods 12.
11. The wheels 5 and 6 change direction via the arm 7 and the support tube 4.

Now, if the belt 8 starts meandering to the left in the belt traveling direction, the edge of the meandering belt 8 pushes the side roller 10 on the left side in Figure 4, causing it to move horizontally by the meandering amount xC (see Figure 6). It will be done. As a result, the arm 7 is simultaneously rotated by the same angle via the rod 12, turnbuckle 13, and rod 11, so that the wheel swing support tube 4 integrated with the arm 7 is rotated around the support shaft 2 in the same direction at the same time. It will be done. By this rotation of the support 11iti4, the wheels 5 and 6 are turned in the direction opposite to the meandering direction of the belt 8, as shown in FIG. 6, and a force is generated in the direction of the belt 8. Therefore, the belt 8 is automatically aligned in response to the belt 8 being fed to the right side in the figure.

When the belt 8 is aligned, the side roller support arm 9, which had been pushed by the belt 8, returns to its original position by the horn of the spring 15, and accordingly, each wheel 5, 6
is automatically returned to its original orientation.

When the belt 8 meanders to the right in the direction of travel, see Fig. J2 right ml! By pushing the side rollers 10 toward the outside wheel 1, the wheels 5, 6 are directed in the opposite direction.

Although the drawings illustrate the case where the device of the present invention is applied to the return fill, it is of course possible to apply it to the carrier side as the required trough angle. Although the case is shown in which the support cylinder 4 integrated with the wheel is rotated, the support shaft 2 and the wheel shaft 3 are integrated and the support cylinder 4 is fixed.
The support shaft 2 may be fitted into the support cylinder 4, and a notch may be provided in the fu 11 portion of the support cylinder 4 to fix the arm 7 and the support shaft 2, and the side rollers 10 are made of a material with excellent wear resistance. If so, it does not need to rotate, so it may be a plate, and the spring 15 may be replaced by another telescoping device, and modifications may be made without departing from the gist of the present invention.

Of course it is possible.

As described above, the apparatus of the present invention can produce the following excellent effects.

(i) Since the side rollers can constantly move in correspondence with the belt, responsiveness is good regardless of the amount of meandering.

[11] The meandering of the belt allows the wheels to be oriented at an angle that reliably generates the centering force, so the centering force of the belt is high.

Since QiD (11) above has a high centering horn, it can be used for curve conveyors.

Since each 0ψ wheel has a strong centering angle, the centering ability J is high.

(v) It has a simple mechanism, operates reliably, and is less likely to break down, requiring less effort in terms of maintenance.

(The entire vD device is very compact and is not as bulky as the conventional system.

υ0 It can operate reliably without using any incidental equipment such as hydraulic equipment or electrical equipment in the conventional method.

) Easy to install on existing conveyors.

(b) Since the alignment property is high, it is possible to lower the installation accuracy of conveyor girder frames, stringers, etc.

[Brief explanation of the drawing]

Figure 1 is a front view of belt meandering detection H in a conventional device, Figure 2 is a layout of the rollers operated by the detection unit in Figure 1, and Figure 3 is a schematic diagram of the rows of A and A in the conventional device. A plan view showing,
FIG. 4 is a plan view of the device of the present invention, FIG. 5 is a partial perspective view of the device of the present invention, and FIG. 6 is a schematic plan view showing the operating state of the device of the present invention. 1... Roller mount, 2... Wheel swing support shaft, 5
．． 6...Wheel, 7...Arm, 8...Belt, 9...Side roller support arm, 10...Side roller, 11.12...Rod.

Claims (1)

[Claims] 1) Place the wheels that support the belt on the roller stand.
The roller frame is rotatably supported so that it can be moved freely and its direction can be changed in the horizontal direction, and a device for detecting belt meandering is provided at both ends of the roller mount, and the belt meandering detecting device and the wheel are connected to each other by a rod. A belt meandering prevention device characterized by being mechanically connected through a belt.