JPH09315535A - Pipe conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe conveyor capable of preventing ears of a belt from being cut by reliably detecting deviation of the belt. SOLUTION: Belt deviation detectors 9 and aligning rollers are arranged near a head pulley in a carrier side belt 2. A pair of belt deviation detectors 9 are arranged on both side positions of trough rollers 11. Each detector 9 is constituted of a detecting roller 12 and a limit switch 13 connected to a shaft 12a of the detecting roller 12 and to be tuned on when the detecting roller 12 is oscillated outward in the width direction of the belt 2. Collar parts 12b, 12c projecting to the whole circumference in the lateral direction are provided on the upper end and the lower end of each detecting roller 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe conveyor, and more particularly to a pipe conveyor capable of avoiding inconveniences such as the edge of a belt being cut off due to an offset.

[0002]

2. Description of the Related Art A pipe conveyor is, for example, the actual open sho 62.
As disclosed in Japanese Patent Application Laid-Open No. 53212/1994 and Japanese Patent Application Laid-Open No. 6-329223, the shape of the belt is set to be a trough at the loading portion of the material to be loaded, and then the shape of the belt is changed to a circular shape as the belt travels. The material to be transported is wrapped in the form of a pipe, and the shape of the belt at the discharge portion is made flat like the ordinary belt conveyor. Further, the return-side belt is also made to run in a pipe shape similarly to the carrier side, so that it is possible to prevent the transported material from being scattered by the wind or being spilled while the belt is running. Further, since the pipe conveyor has a pipe shape, the pipe conveyor is excellent in that it can perform curved transportation with an appropriate radius in the plane direction and the longitudinal direction and can also perform inclined transportation at a predetermined angle.

Although it has excellent properties as described above, when the belt is opened from the pipe shape to the trough shape, there is a possibility that the belt is deviated. In order to detect this deviation,
In the conventional pipe conveyor, as shown in FIG.
It may be equipped with a belt offset detector. In FIG.
Reference numeral 51 is a belt, and 52 is a conveyor roller for guiding the belt.

This conventional belt deviation detector 50 is a detection roller 53 which is laterally opposed to the widthwise end portion 51a of the trough-shaped belt 51 and has its axis oriented substantially vertically, and the detection roller 53. A limit switch 54 that is swingably connected to the shaft of the belt 51 in the width direction of the belt 51 to detect that the detection roller 53 swings in a direction away from the belt 51, that is, that the belt 51 is deviated more than a predetermined amount. ,,. The signal detected by the limit switch 54 is supplied to, for example, a drive device for the belt 51.

When the belt 51 is deviated more than a predetermined amount, the widthwise end 51a of the belt 51 contacts the detection roller 53 and pushes the detection roller 53 outward in the plate width direction to cause the limit switch 54 to move. Is turned on, and subsequently, the signal detected by the limit switch 54 is supplied to the drive device, and the drive device stops the traveling of the belt 51.
This avoids the occurrence of inconveniences such as the rollout of the belt 51, corrects the deviation of the stopped belt 51, and then restarts driving.

[0006]

However, since the belt 51 of the pipe conveyor is repeatedly bent into a circular pipe shape during traveling, the widthwise end portion 51a of the belt 51 is formed as shown in FIG. As shown in (3), the end portion 51a is lifted from the conveyor roller 52 when it is opened in a trough shape due to the tendency to warp to the upper side.

When the belt 51 is offset in this state, as shown in FIG.
May get over the detection roller 53 without coming into contact with the side surface (detection surface) of the detection roller 53. When the widthwise end portion 51a of the belt 51 passes over the detection roller 53 in this way, deviation of the belt 51 may not be detected, and the end portion 51a of the belt 51 collides with a hood or the like and rubs against it. May cause ear loss.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a pipe conveyor capable of reliably detecting the deviation of the belt to prevent the belt from being cut off. .

[0009]

In order to solve the above-mentioned problems, in the pipe conveyor according to the first aspect of the present invention, the belt is formed in a pipe shape at least on the return side and the carrier side. A pipe conveyor having a trough shape or a planar shape in the vicinity of a pulley or the like, and a belt having a detection unit facing in the width direction to the width direction end portion of the belt at a position where the belt shape is the trough shape or the planar shape. A deviation detector is provided, and a collar portion projecting at least toward the belt side is provided above the portion of the detection portion facing the end portion of the belt.

According to the present invention, even if the belt is deflected to the upper side in the widthwise end portion of the belt, the widthwise end portion of the belt is prevented from passing over the detection portion by the flange portion. Therefore, the deviation of the belt can be surely detected.

Next, the invention described in claim 2 is different from the structure described in claim 1, in that it is installed near the belt offset detector and performs centering of the belt, and And a controller for adjusting the belt position to the center of the conveyor via the centering device based on the detection signal of the belt deviation detector.

By centering the belt by detecting the deviation of the belt by the deviation detector of the belt, even if the deviation of the belt is detected by the deviation detector of the belt, it is not always necessary to temporarily stop the running of the belt.

Next, the invention described in claim 3 is different from the structure described in claim 1 or 2 in that the belt is upstream from the belt deviation detector and the shape of the belt is a trough or a flat surface. A cleaner body that slidably contacts the widthwise end face of the belt at the position where the shape of the belt is formed, and a cleaner support that presses the cleaner body toward the belt side with a predetermined force while supporting the cleaner body so that the cleaner body can advance and retreat in the belt width direction. It is characterized by having.

In the present invention, the adhering matter adhered to the widthwise end portion of the belt can be brought into contact with the detecting portion of the belt deviation detector in a state where the adhering matter is removed from the cleaner body, and the adhering adhered matter causes the belt width to increase. Slip is prevented when the direction end contacts the detection unit.

Here, even if the belt has a predetermined meandering, the cleaner main body moves back and forth following the meandering of the belt by the action of the cleaner supporting portion, so that the cleaner main body slides on the end of the belt. Even if it is done, the edge of the belt is prevented from being cut off.

When the belt of the pipe conveyor is formed into a pipe shape, the powder of the transported material is likely to adhere to the inner end of the belt.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. The pipe conveyor according to the present embodiment has a basic structure similar to that of a conventional pipe conveyor. As shown in FIG. 1, the ascending belt 2 is on the carrier side, and a loading portion near a tail pulley (not shown). Transported items are loaded on the belt 2 that is in the shape of a trough, and the belt 2 loaded with the transported items becomes a circular pipe shape as it travels toward the head pulley 26 and encloses the transported items. When it is transported to the head pulley 26, it further spreads and becomes a trough shape or a flat shape, and the transported material is discharged at the discharge portion to become the return-side belt 3. In FIG. 1, 4 indicates a cleaner for removing deposits on the carrying surface of the belt.

The belt on the return side passes through the snap pulley 5, the bend pulley 6 and the take-up pulley 7 in a planar state, and further passes through another bend pulley 8 and then again toward a tail pulley (not shown), and is circular. By traveling in the form of a pipe, it is possible to prevent the adhered substances on the carrying surface of the belt 3 from scattering during traveling of the belt.

In this embodiment, the belt offset detector 9 and the aligning roller 10 which is an aligning device are arranged near the head pulley 26 of the carrier side belt 2.

As shown in FIG. 2, the belt offset detectors 9 are arranged in pairs on both sides of a trough roller 11 for guiding the belt 2. Each of the belt offset detectors 9 constitutes a detecting portion, and is connected to a detection roller 12 facing the widthwise end of the belt 2 in the widthwise direction, and a shaft 12a of the detection roller 12 to perform the detection. The limit roller 13 is turned on when the working roller 12 swings outward in the width direction of the belt 2.

The detection roller 12 is installed in a state in which its axis is oriented substantially in the vertical direction and is slightly tilted toward the belt 2 side. The detection roller 12 is rotatably set around the axis 12a, and when deviation occurs. The widthwise end portion 2a of the belt 2 is prevented from being rubbed by the detection roller 12.

At the upper end and the lower end of the detection roller 12, flanges 12b and 12c are provided which extend over the entire circumference in the lateral direction. The collar portions 12b and 12c are integrated with the detection roller 12 main body. However, the collar portion 12b,
It is also possible to make 12c separate from the detection roller body and to project to the belt side.

The limit switch 13 can supply a detection signal to the controller 15. Further, the aligning roller 10 has a known structure as shown in FIG. 3, and by swinging about the vertical shaft 16 at the center, the belt 2 can be automatically aligned around the conveyor. There is. However, in the present embodiment, the rotating shaft 16 of the aligning roller 10 extends downward and is connected to the aligning actuator 18 such as an electric motor via the clutch 17. The clutch 17 has an aligning roller 10 in the initial state.
It is set so that the connection between the side and the centering actuator 18 side is cut off, and the two are connected by a signal from the controller 15. By this, in normal time,
The same automatic alignment as in the past has been implemented.

In addition, the centering actuator 18 rotates the orbiting shaft 16 forward or backward by a predetermined amount in response to a signal from the controller 15. Controller 15
When a signal indicating that the deviation is detected is input from the limit switch 13, supplies a connection signal to the clutch 17 and a signal for rotating the centering actuator 18 by a predetermined angle in a predetermined direction. After a lapse of a certain time, the signal to the alignment actuator 18 is stopped and the disconnection signal is supplied to the clutch 17.

In the pipe conveyor having the above structure,
If the belt 2 traveling in the form of a pipe from the tail pulley side opens toward the head pulley 26 and the belt 2 deviates more than a predetermined amount, the widthwise end portion 2 a of the belt 2 causes the detection roller 12 to move. And the detection roller 12 is pushed outward. When the detection roller 12 swings outward in this way, the limit switch 13 is turned on, and the detection signal is supplied to the controller 15.

Then, the controller 15 determines that the belt 2 is offset by a predetermined amount or more in the direction in which the detection signal is input, and swings the aligning roller 10 so as to eliminate the offset, that is, toward the center of the conveyor. Let For example,
If it is judged that the roller is offset to the left side, the aligning roller 1
The centering roller is forcibly oscillated via the centering actuator 18 and the clutch 17 so that the left side of 0 is tilted in the traveling direction of the belt 2 by a predetermined amount.

However, when a signal is not input from both belt deviation detectors 9, the clutch 17 is disengaged so that the meandering occurring in the belt 2 is not restricted by the rotation shaft 16 of the aligning roller 10. In accordance with the above, automatic centering will be performed as in the past.

Further, since the belt 2 repeats the shape of a circular pipe, the widthwise end 2a thereof has a tendency to warp upward. Even if the widthwise end portion 2a of the belt 2 is warped to the upper side as described above, the flange portion 12b is provided at the upper end portion of the detection roller 12 in the present embodiment. As shown in FIG. 5, the end portion 2a of the belt 2 is restrained by the brim and does not come over the detection roller 12 and surely abuts on the detection roller 12 so that the deviation can be detected.

Thus, in this embodiment, the belt 2
Even if the end portion 2a in the width direction of the belt is warped, the belt 2
The deviation of can be detected. Further, by swinging the aligning roller 10 in accordance with the deviation, the meandering portion of the meandering (deviation) of the belt 2 of a predetermined amount or more has a meandering portion at the aligning roller 1.
Since the aligning roller 10 is forcibly oscillated so as to reduce the meandering (deviation) before entering 0, it is not always necessary to stop the running of the belt 2 even if the deviation is detected.

Here, the limit switch 13 of the belt offset detector 9 is made to detect in multiple stages according to the swing angle of the detection roller 12, or the swing angle of the detection roller 12 is detected by another detection. Alternatively, the controller 15 may be configured to detect continuously, and the swinging control of the aligning roller 10 by the controller 15 may be performed more finely. Furthermore,
When the swing angle of the detection roller 12 is swung by a predetermined amount or more,
The traveling of the belt 2 may be stopped in the same manner as in the conventional case without performing the control by the controller 15.

In the above embodiment, the aligning roller 10 is arranged on the upstream side of the belt deviation detector 9, but the aligning roller 10 may be arranged on the downstream side. Also,
In the above embodiment, the centering roller 10 is controlled by the detection value of the belt offset detector 9, but the present invention is not limited to this, and the belt offset detector 9 detects the offset of the belt 2. If detected, the traveling of the belt 2 may be set to stop as in the conventional case.

The installation position of the belt offset detector 9 is set at the head pulley 2 of the carrier belt 2.
The position of the belt 2 is not limited to the vicinity of 6, and may be another position as long as the belt 2 has a trough shape or a flat shape.

In the above embodiment, the belts 2 and 3 are pipe-shaped on both the carrier side and the return side. However, for example, the carrier-side belt 2 is not pipe-shaped. It can also be applied to a pipe conveyor that travels in a trough shape.

On the carrier side, when the belt 2 is formed into a pipe shape to wrap and transport the transported object, as shown in FIG. 5, one end portion 2a in the width direction of the belt 2 enters inside and the end portion 2a thereof is inserted. The powder 20 of the transported material 19 is likely to adhere to the. To deal with this, an ear cleaner 21 may be installed on the upstream side of the belt offset detector 9.

For example, as shown in FIG. 6, the ear cleaner 21 has a cleaner main body 22 that comes into contact with the widthwise end 2a of the belt 2 from the outside in the widthwise direction, and the cleaner main body 22 can be retracted. It is composed of a spring 23 that presses the belt 2 toward the end portion 2a in the width direction. The spring 23 constitutes a cleaner support portion.

The cleaner body 22 is not preferably too hard, and is made of the same material as the belt 2, for example. Further, in FIG. 6, the belt 2 is shown in a flat shape for easy understanding, but the belt 2 may be in a trough shape. That is, even if it has a trough shape, the surface of the cleaner body 22 facing the widthwise end 2a of the belt 2 may be set so as to be substantially orthogonal to the widthwise end 2a of the belt 2. In FIG. 6, 24
Is a hopper.

When the ear cleaner 21 is arranged, before the belt 2 opens from the pipe shape into the trough shape and enters the installation position of the belt offset detector 9,
The widthwise end portion 2a of the belt 2 is rubbed by the cleaner body 22 to remove the powder 20 of the transported material 19 adhering to the widthwise end portion 2a of the belt 2.

At this time, since the cleaner body 22 can be moved back and forth by the spring 23, the belt 2
It is prevented that the belt 2 moves back and forth according to the meandering of the belt 2 and comes into contact with the end portion 2a of the belt 2 with a pressing force more than a predetermined value.
The width-direction end portion 2a of the belt 2 can be reliably cleaned without causing a sharp edge.

As a result, the belt 2 which is biased
The width-direction end 2a of the belt 2 reliably abuts the detection roller 12 of the belt offset detector 9 without causing slippage due to the powder 20 of the transported material 19, and the end 2a of the belt 2
It is possible to prevent the powder 20 adhering to the particles from dropping and scattering at any place.

When the cleaner body 22 is made of the same hardness as that of the belt 2 as described above, the end surface 2a of the belt 2 is constantly rubbed to form a recess on the contact surface. The recessed portion serves as a recessed portion that guides the end portion 2a of the belt 2. However, even if the end 2a is warped, it may be formed in a concave shape from the beginning so as to surely contact the end 2a.

The ear cleaner 21 may be arranged separately from the belt offset detector.

[0042]

As described above, in the pipe conveyor of the present invention, even if the widthwise end of the belt is warped upward, the deviation of the belt can be reliably detected, and the belt rolls out. The inconvenience can be surely avoided.

Further, in the case where the invention described in claim 2 is adopted, the alignment can be performed according to the detected deviation, so that the running of the belt is not always stopped even if the deviation of the belt occurs. There is an effect that the centering of the belt becomes possible.

Further, when the invention described in claim 3 is adopted, there is an effect that the widthwise end portion of the belt can be cleaned.

[Brief description of drawings]

FIG. 1 is a diagram showing a pipe conveyor according to an embodiment of the present invention.

FIG. 2 is a diagram showing a belt offset detector according to an embodiment of the present invention.

FIG. 3 is a diagram showing an aligning roller according to an embodiment of the present invention.

FIG. 4 is a diagram for explaining a case where the belt end portion according to the embodiment of the present invention is warped and a deviation occurs.

FIG. 5 is a diagram for explaining the reason why powder of a transported material is likely to adhere to the end portion of the belt.

FIG. 6 is a diagram showing an ear cleaner according to the embodiment of the present invention.

FIG. 7 is a diagram showing a belt offset detector in a conventional pipe conveyor.

FIG. 8 is a diagram showing a state where a belt end portion is warped.

FIG. 9 is a diagram showing a state in which an end portion of a belt rides over a detection portion of a conventional belt deviation detector.

[Explanation of symbols]

 2, 3 Belt 2a Width end 9 Belt offset detector 10 Aligning roller 12 Detection roller 13 Limit switch 15 Controller 17 Clutch 18 Aligning actuator 19 Transported material 21 Ear cleaner 22 Cleaner body 23 Spring

Claims (3)

[Claims] 1. A pipe conveyor in which the belt has a pipe shape on at least one of a return side and a carrier side and has a trough shape or a flat shape in the vicinity of a pulley or the like, wherein the belt shape is a trough shape or a flat surface. A belt offset detector having a detection unit facing the widthwise end of the belt at the position where the belt-shaped position is formed, and at least the belt is provided above the portion of the detection unit facing the end of the belt. A pipe conveyor characterized in that it has a flange portion that projects toward the side. 2. A centering device installed near the belt deviation detector to center the belt, and a belt position conveyor via the centering device based on a detection signal of the belt deviation detector. The pipe conveyor according to claim 1, further comprising a controller for adjusting the center of the pipe conveyor. 3. A cleaner main body which is in sliding contact with an end surface in the width direction of the belt at a position upstream of the belt offset detector and where the shape of the belt is a trough shape or a flat shape, and the cleaner main body has a plate width of the belt. The pipe conveyor according to claim 1 or 2, further comprising: a cleaner support portion that presses the cleaner main body toward a belt side with a predetermined force in a state of being supported so as to be able to move forward and backward.