JP2000191260A - Meandering detecting device for belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the safety of belt conveyor while detecting the meandering of a belt more than the predetermined quantity by forming a standing piece at an end of a corresponding support and guide member at ends of a belt in the cross direction of a belt, and providing a roller for pushing the belt to the support and guide member side freely to be turned, and detecting the movement of the roller. SOLUTION: A roller 10 is rotated on an end of a belt 3 in usual, and provided in a fixed part 20 through a lever 11 freely to be turned. A spring 12 gives the force for always pushing the lever 11 down with the spring force, and the roller 10 is thereby rotated for traveling on a belt while pushing the belt 3. A switch 13 is arranged over the lever 11 with a space, and switch 14 is arranged under the lever 11 with a space so as to restrain the upward movement of the lever 11. In the case where the belt 3 meanders in a direction A more than necessity, the roller 10 is removed from the belt 3, and the lever 11 is rotated counter clockwise around the fixed part 20 so as to operate the switch 14, and detects the meandering in the direction A, and detects the meandering in a direction B on the basis of the clockwise rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt meandering detection device for a belt conveyor, and is particularly suitable for a moving walkway carrying passengers.

[0002]

2. Description of the Related Art Conventionally, moving walkways are roughly divided into:
There are a pallet type in which passengers are placed on a pallet and a belt type in which passengers are placed on a belt. In particular, a belt-type moving sidewalk has a fundamental problem that the belt meanders.

For this reason, as shown in FIG. 2, in the case of a moving sidewalk in which a belt 3 moves on a sliding plate 2 between skirt panels 1 opposed to each other at intervals, the sliding plate 2
The rising pieces 2a are provided at both ends, and the movement preventing pieces 4a are provided at both ends of the rollers 4 of the belt 3 (such as a driving roller for driving the belt 3, a driven roller or a guide roller) as shown in FIG. It is configured to prevent meandering (driving on one side) more than a predetermined amount.

[0004]

However, even if the belt is meandering excessively, it cannot be detected, and if the belt continues to be driven on the moving sidewalk, the belt 3 will be raised by the rising piece 2a of the sliding plate 2.
There is a risk that the belt may be damaged by overcoming the movement of the roller 4 or over the movement preventing piece 4a of the roller 4.

[0005] The present invention has been made in view of the above points, and relates to a safety device for detecting a belt meandering more than a predetermined value.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a rising piece is provided at an end of the belt in the width direction of the belt at a corresponding end of the belt in a width direction of the belt supported and guided by the supporting guide. And a rotatable roller that presses the belt toward the support and guide member, and detects the meandering of the belt based on the behavior of the roller.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the meandering of the belt in either the left or right direction can be detected by the behavior of a single roller.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of a meandering detection apparatus showing one embodiment of the present invention. In the drawings, the same reference numerals as those in FIGS. 2 and 3 denote the same parts, but reference numeral 10 denotes a roller which normally rotates on the end of the belt 3, and is rotatably mounted on the fixed portion 20 via the lever 11. Is provided.

Reference numeral 12 denotes, for example, a spring which applies a force for constantly pushing the lever 11 downward by a spring force. The spring 12 causes the roller 10 to rotate on the belt while pressing the belt 3.

13 is above the lever 11 and 14 is the lever 1
Switches (e.g., limit switches, etc.) are provided below and below each other with a predetermined gap. And
Reference numeral 21 denotes a stopper for suppressing the upward movement of the lever 11.

Therefore, when the belt 3 is deviated in the direction A more than necessary in FIG. 1, the state shown in FIG.
Since the roller 10 comes off from the belt 3, the lever 11 rotates counterclockwise around the fixing portion 20 and the switch 14
To detect that the belt 3 has excessively meandered in the direction A.

On the other hand, if the belt 3 is shifted more in the direction B than necessary in FIG. 1, the state shown in FIG.
Belt 3 raised along the rising piece 2a of the sliding plate 2
As a result, the roller 10 is pushed up against the spring force of the spring 12, and as a result, the lever 11 rotates clockwise about the fixed portion 20 to operate the switch 13, and the belt 3 meanders in the B direction. Detect that.

Naturally, there is an allowable meandering amount, and the adjustment is performed by the width of the roller 10 and the size of the gap between the rising piece 2a of the sliding plate 2 and the end of the belt 3.

FIG. 6 is a view showing another embodiment of the present invention, in which the above-described meandering detecting device is provided so as to face the roller 4 of the belt 3.

That is, in FIG.
The roller 10 is arranged so as to be sandwiched between the roller 10 and the roller 10.

In the same manner as in the above-described case, the belt 3 is detected as excessively meandering through the rotation of the lever 11 over a predetermined amount.

In any case, if excessive meandering of the belt 3 is detected, the operation of the moving sidewalk is stopped to prevent the belt from being damaged, and thus to ensure the safety of passengers.

Since the roller 10 appropriately presses the end of the belt 3 against the supporting and guiding member, the roller 10 also has a function of suppressing meandering of the belt 3.

[0019]

As described above, according to the present invention, the following effects are exhibited. Excessive meandering of the belt can be detected with a single detector regardless of direction. The structure for supporting and guiding the belt may be either a sliding plate or a roller, and may be implemented with a return pulley. In the event that the belt is broken and the belt runs out, the same detection can be performed, and the movement speed of the belt can be simultaneously detected by checking the number of rotations of the rollers.

[Brief description of the drawings]

FIG. 1 is an overall view of a meandering detection apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view of a belt-type moving sidewalk.

FIG. 3 is another sectional view of the belt-type moving walkway.

FIG. 4 is an explanatory diagram for explaining the operation of the device according to the present invention.

FIG. 5 is an explanatory diagram for explaining the operation of the device according to the present invention.

FIG. 6 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

 2 Sliding plate 2a Rising piece of sliding plate 2 3 Belt 4 Roller 4a Movement preventing piece of roller 4 10 Roller 11 Lever 12 Spring 13, 14 Switch

Continued on the front page F term (reference) 3F023 BA02 BB01 BC01 CA02 GA07 3F027 AA02 DA21 EA01 FA02 3F321 AA04 CB02 CC11

Claims (5)

[Claims] 1. A belt that is supported and guided by a support guide member and circulates at a widthwise end of the belt.
A corresponding rising end is formed at the end of the support guide member, and a rotatable roller for pressing the belt toward the support guide member is provided, and the meandering of the belt is detected by the behavior of the roller. Belt conveyor meandering detection device. 2. The switch according to claim 1, wherein the roller is rotatably provided on a fixed portion via a lever, and a switch is disposed above and below the lever with a predetermined gap. A meandering detection device for a belt conveyor as described in the above. 3. The apparatus according to claim 1, wherein the roller is pressed toward the support member by a spring force of a spring.
3. A meandering detection device for a belt conveyor according to claim 1. 4. The meandering detecting device for a belt conveyor according to claim 1, wherein the support guide member is a sliding plate. 5. The belt conveyor meandering detecting device according to claim 1, wherein the support guide member is a roller.