JPH11263419A - Meandering movement corrector in hydraulic belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically perform a continuous and stable correction of the meandering movement of a belt even when the travelling direction of the belt is changed during correction of the meandering movement of the belt. SOLUTION: A belt travelling direction detector 60 is provided for generating mechanical driving force corresponding to the travelling direction of a belt 1. A passage switching device 70 is provided in a water supply and drain passage for communicating a first flow passage controller 50a, a second flow passage controller 50b and a hydraulic cylinder device 8 together. Upon switching of the belt travelling direction, the flow passage switching devices 50a and 50b are operated by the mechanical driving force generated from the belt travelling direction detector 60, so that directions of supplying pressure water to the hydraulic cylinder device 8 and of draining pressure water from the hydraulic cylinder device 8 are switched. Thus, a meandering movement adjusting roller 4 is rotated to a direction opposite to that before the belt travelling direction is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a hydraulic belt conveyor meandering correction device for automatically correcting the meandering of a belt conveyor, and the belt conveyance direction is changed during the meandering correction of the belt conveyor. However, the present invention relates to a hydraulic belt conveyor meandering correction device capable of automatically correcting belt meandering.

[0002]

2. Description of the Related Art Generally, in a belt conveyor device,
The meandering of the running belt often occurs depending on the position and weight of the conveyed goods on the belt conveyor, the installation conditions of the equipment, and the like, and in order to correct such meandering, a meandering correction device for various belt conveyors has been conventionally used. Is being developed.

FIG. 15, FIG. 16 and FIG. 17 are a schematic plan view, a schematic front view, and a schematic operation diagram showing an example of this kind of belt conveyor meandering correction device developed earlier by the applicant of the present invention. It has been disclosed as Kaihei 9-20415 (hydraulic belt automatic centering device).

That is, in FIG. 15 to FIG.
Is a belt of a belt conveyor device, 2 is a fixed frame, 3
Is a mounting frame, 4 is a carrier roller, 5 is a rotating shaft,
6 is a horizontal rail integrated with the fixed frame, 7 is an operation lever, 8 is a hydraulic cylinder, 9 is a piston rod, 10 is a return roller, 11 and 12 are touch rollers, 13 and 14 are mounting arms, and 15 and 16 are rotating shafts. , 17 and 18 are arms, 19 and
20 is a switching valve, 21 is a water supply pipe, 22 is a piston front chamber,
23 is a piston rear chamber, 24 and 25 are drain pipes, 26 and 27
Is a throttle valve.

[0005] In FIG. 15, for example, when a conveyed article L is loaded on the belt 1 traveling in the direction of arrow A, the belt 1 usually meanders in the direction of arrow B. As a result, the touch roller 12 moves in the direction of arrow B as shown in FIGS. 15 and 17, and this movement is transmitted to the spool of the switching valve 20 via the mounting arm 14 → the rotating shaft 16 → the arm 18, and the switching valve 20. Is activated. Thereby, pressurized water from the water supply pipe 21 is supplied into the piston front chamber 22 of the hydraulic cylinder 8, the piston rod 9 is drawn in the direction of arrow B, and the pressurized water in the piston rear chamber 23 is switched from the switching valve 20 to the drain pipe. 25 → discharged through the throttle valve 27.

When the piston rod 9 of the hydraulic cylinder 8 is retracted, the axis of the carrier roller 4 rotates in the direction of arrow C in FIG. 15 (counterclockwise) through the operation lever 7 → the rotating shaft 5 → the mounting frame 3. Be moved. As a result, belt 1
, The belt 1 moves in the direction of the center position (the direction of arrow B 'in FIG. 15). When the belt 1 moves in the direction of arrow B ′ due to the meandering correction of the belt 1,
The belt 1 is separated from the touch roller 12. As a result, the sprawl of the switching valve 20 returns to the offset position by the elastic force of the spring, and the switching valve 20 is closed. Thereby, the rotation of the mounting frame 3 in the direction of arrow c is stopped,
The belt 1 continues to travel while holding the frame 3 and the carrier roller 4 at the positions indicated by the two-dot chain lines in FIG.
When the belt 1 meanders in the direction of arrow B 'for some reason, the touch roller 11 operates and the shafts of the frame 3 and the carrier roller 4 are moved through the same process as described above. Is held at the position indicated by the dotted line.

[0007] The hydraulic belt conveyor meandering correction device disclosed in Japanese Patent Application Laid-Open No. 9-20415 utilizes an industrial water pipe for sprinklers provided along the belt conveyor to prevent dust scattering. A hydraulic cylinder and mechanically switching the switching valve by the displacement of the touch roller that detects belt meandering, to accurately perform automatic meandering correction of the belt conveyor without requiring electricity as a power source. Can be
It has excellent practical utility. However, there are still many problems to be solved in the hydraulic belt conveyor meandering correction device. Among them, the problem to be solved immediately is that the running direction of the belt conveyor is switched during the meandering correction of the belt. This is the point of self-alignment.

That is, FIG. 1 of Japanese Patent Application Laid-Open No. 9-20415
5, the belt 1 meanders in the direction of arrow B while traveling in the direction of arrow A. In order to correct this, the touch roller 12, the switching valve 20, the hydraulic cylinder 8 and the like are operated, and the mounting frame 3 and the carrier roller It is assumed that the running direction of the belt 1 is switched while the shaft center of No. 4 is rotated in the direction of arrow C (counterclockwise), and the belt 1 starts running in the direction of arrow A ′. Then, since the axis of the carrier roller 4 is rotated in the direction indicated by the arrow C as shown in FIG. 15, the belt 1 is subjected to the action in the direction of promoting the meandering (the direction indicated by the arrow B) contrary to the correction of the meandering. , Meandering in the direction of arrow B (toward the touch sensor 12).

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a hydraulic belt conveyor meandering correction apparatus as described above, namely, when the running direction of the belt conveyor is changed while the meandering correction apparatus is operating, the vehicle runs. In order to solve the problem that the meandering of the belt is promoted on the contrary, the belt cannot be applied to the traveling direction switching type belt conveyor device, the traveling direction of the belt conveyor is automatically detected. By mechanically operating the flow path switching device,
The direction of operation of the hydraulic cylinder device is reversed by switching the direction of the pressurized water supplied to the hydraulic cylinder device and the pressurized water discharged from the hydraulic cylinder device, so that even if the belt conveyor travels in any direction, the automatic operation is always performed. It is an object of the present invention to provide a hydraulic belt conveyor meandering correction device capable of performing belt meandering correction.

[0010]

According to a first aspect of the present invention, there is provided a meandering adjustment roller for correcting a meandering of a belt by adjusting a crossing angle α of an axis of the adjusting roller with respect to the center of the belt. A first meandering detecting device and a second meandering detecting device which are disposed on both sides of the belt and generate mechanical driving force by abutting a meandering belt end; and mechanical driving of the two meandering detecting devices. A first channel control device and a second channel control device that are actuated by force to open a water channel and a drain channel, and pressurized water through a water channel of the first channel control device or the second channel control device to hydraulic cylinders And a hydraulic cylinder device for discharging pressurized water from a hydraulic cylinder through a drainage passage and rotating the meandering adjusting roller device in a direction to correct the meandering of the belt. A belt running direction detecting device for generating a mechanical driving force corresponding to the running direction of the belt, and connecting the first and second flow channel control devices to the hydraulic cylinder device. A flow path switching device is interposed in the feed / drain passage to be operated, and at the time of switching the belt running direction, the flow path control device is operated by the mechanical driving force generated by the belt running direction detecting device, so that the pressurized water is supplied to the hydraulic cylinder device. The basic configuration of the present invention is to switch between the direction of water supply and the direction of drainage of pressurized water from the hydraulic cylinder device, and to rotate the meandering adjustment roller device in a direction opposite to that before switching the belt running direction. .

According to a second aspect of the present invention, in the first aspect of the present invention, the belt traveling direction detecting device includes a direction detecting sensor that slides on the traveling belt, and a connecting bar having one end fixed to the direction detecting sensor. A support shaft that supports the intermediate portion of the connection bar, and a stopper that regulates the movement range of the connection bar,
The direction detection sensor is formed from a spring that presses toward the belt side.

According to a third aspect of the present invention, there is provided a cylinder according to the first aspect of the present invention, wherein the flow path switching device is formed by piercing three port rows and two port rows in a mutually shifted position. And a piston-type flow path switching valve formed of a piston having three ring-shaped depressions formed on the outer peripheral surface thereof and a piston rod protruding outward from the cylinder, and a piston rod of the flow path switching valve The front end and the front end of a connection bar of the belt running direction detecting device are rotatably connected.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In each of the drawings, the same reference numerals are used for the same parts and members as those of the conventional hydraulic belt conveyor meandering correction device shown in FIGS. 15 to 17. FIG. 1 is a schematic plan view in which a part of a belt of a conveyor device provided with a hydraulic belt conveyor meandering correction device (hereinafter, referred to as a meandering correction device) according to the present invention is partially broken, and the belt conveyor meanders. This shows a case where the vehicle is normally traveling in the direction of arrow A (forward direction) or the direction of arrow A '(reverse direction).

As shown in FIG. 1, the meandering correction device of the present invention comprises:
First meandering detection device 4 for detecting meandering to one side of belt 1
0a, a second meandering detection device 40b for detecting meandering to the other side of the belt, and a first flow path control device 50 for opening the flow path of the working fluid (water) W by the operation of the first meandering detection device 40a.
a and the working fluid W by the operation of the second meandering detection device 40b.
A flow path control device 50b for opening the flow path, a traveling direction detection device 60 for detecting the traveling direction of the belt, and the operation of the traveling direction detection device 60 switch between the inflow flow path and the discharge flow path of the fluid W. A flow path switching control device 70; a meandering adjustment roller device 80 rotatably supporting an axis of an adjustment roller that rotates in contact with the belt 1; and an adjustment roller device 8
Hydraulic pivoting the axis phi _R 0 of the roller cylinder device 9
0, and each of the flow control devices 50a and 50b, the flow switching control device 70, and the water supply / distribution passage 100 connecting the hydraulic cylinder device 90 to each other.

The first meandering detecting device 40a, the second meandering detecting device 40b, the first flow control device 50a and the second flow control device 50b are opposed to each other on both sides of the belt 1 of the belt conveyor as shown in FIG. Fixed frame 2
It is supported and fixed on the top. That is, in the embodiment of FIG. 2, each of the meandering detection devices 40a and 40b
1/12, mounting arms 13/14, rotating shafts 15/16,
When the belt 1 meanders as shown by a dotted line in FIG. 2 and the side end thereof presses and moves the touch roller 12 as shown by a dotted line in FIG. As a result, the operation arm 18 (not shown) is driven, and the second flow path control device 50b described later is operated.

Further, the first flow path control device 50a and the second flow path control device 50b include a well-known 4-port 2-position switching valve 19/20, drain pipe 24/25, and throttle valve 26/27.
For example, as shown by a dotted line in FIG. 2, when the second meandering detection device 40b operates, the spool (not shown) of the switching valve 20 is pressed via the operation arm 18 (not shown). And the water pipe P ₂ of the switching valve 20
-A ₂ and drainage channel B ₂ -T ₂ are communicated with each other,
Until the second meandering detection device 40b returns to the non-operating state, the switching valve 20 is kept in the above-described operating state. FIG.
The configuration and operation of each of the meandering detection devices 40a and 40b and each of the flow path control devices 50a and 50b shown in FIG. 1 are the same as those of the known technology shown in FIGS. I do.

FIGS. 3 and 4 show a meandering adjusting roller device 80.
FIGS. 5A and 5B are a front view and a side view showing a mounting state of the hydraulic cylinder device 90, wherein a meandering adjustment roller device 80 is provided in a carrier roller array of a belt conveyor device, and the load L is viewed from the back side of the belt 1 being conveyed. FIG. 6 shows a case in which a meandering correction force is applied to the motor. That is, the adjusting carrier roller 4 that is in contact with the back side of the belt 1 is rotatably supported by the mounting frame 3. The shaft is rotatably supported. Further, both side portions of the mounting frame 3 are rotatably supported by support rollers 6b supported on the cross rail 6 via support plates 3a.

The hydraulic cylinder device 90 includes a fixed frame.
Is supported and fixed to the horizontal rail 6 of the
Hydraulic cylinder 8, piston rod 9, operating lever 7, etc.
Is formed from. And the piston to the hydraulic cylinder 8
The pressurized water W is supplied to the rear chamber 23 and the piston rod 9
Is protruded, and meanders through the operation lever 7 and the rotating shaft 5.
The mounting frame 3 of the adjusting roller device 80 is counterclockwise.
Is rotated. That is, in plan view, the meandering adjustment row
Of the adjusting roller 4 of the roller device 80 _RIs the axis of belt 1
Heart φ_CTo the direction inclined by the angle α with respect to
Therefore, the meandering of the belt 1 is corrected.

Similarly, when the pressurized water W is supplied to the piston front chamber of the hydraulic cylinder 8, the piston rod 9 of the hydraulic cylinder 8 is retracted, and conversely, the mounting frame 3 of the meandering adjusting roller device 80 is moved. It is rotated clockwise about the rotation shaft 5. The configuration and operation of the meandering adjustment roller device 80 are described in FIGS.
Since it is almost the same as that of the conventional hydraulic belt conveyor meandering correction device shown in (1), detailed description thereof is omitted here.

In FIGS. 3 and 4, the meandering adjustment roller device 80 is arranged between the carrier roller rows of the belt conveyor device. The meandering adjustment roller device 80 is a return roller of the belt conveyor device. The meandering adjustment roller 4 may be disposed between the rows and brought into contact with the outer surface of the returning belt 1. As shown in FIGS. 5 and 6, the meandering adjusting roller device 80 is disposed at a position opposite to a return roller row (not shown) of the belt conveyor device with the belt 1 interposed therebetween. The meandering adjustment roller 4 may be brought into contact with the back side of the roller 1.

The running direction detecting device 60 for the belt mechanically detects the running direction of the belt 1 and also detects the running direction of the belt 1.
Is transmitted to the flow path switching control device 70 to switch the flow path of the pressurized water W supplied to the hydraulic cylinder device and the flow path of the pressurized water W discharged from the hydraulic cylinder device. That is, the traveling direction detection device 60 is configured as shown in FIGS.
A direction detecting sensor 60a disposed below the belt 1 and sliding on the belt 1 as shown in FIG.
a, a support shaft 60c for pivotally supporting an intermediate portion of the connection bar 60b, a stopper 60d for regulating an operation range of the connection bar 60b, and a direction detection sensor 60.
a is biased toward the belt conveyor 1 side, etc., and is appropriately fixed to the fixed frame 2 of the belt conveyor device.

When the belt 1 is now traveling in the direction of arrow A in FIG. 7, the direction detecting sensor 60a sliding on the back side of the belt 1 is pulled in the traveling direction of the belt 1 by frictional force. As a result, the distal end of the connecting bar 60b moves in the direction of arrow A ', and the flow path switching control device 70 described later is operated. When the running direction of the belt 1 is switched to the direction of arrow A ', the direction detecting sensor 60a is pulled in the direction of arrow A' opposite to the above with the running of the belt 1, and as a result, the connecting bar 60b The end moves in the direction of arrow A opposite to the above, and the flow path switching control device 70
Is operated in the reverse direction, thereby switching the fluid flow path to the hydraulic cylinder device.

In this embodiment, the direction detecting sensor 60 is used.
Although a sliding type sensor is used as a, a type other than the sliding type, for example, a roller type sensor may be used, and the traveling force of the belt 1 causes a tensile force (mechanical force) in the same direction.
May be formed on the connecting bar 60b.

The flow path switching control device is shown in FIGS.
A 5-port piston type flow path switching valve 70a as shown in FIG.
It is formed of a piston rod 70b, a pin 70c for rotatably connecting the tip of the piston rod 70b and the tip of the connection bar 60b, and the like. That is, the piston type flow switching valve 70a is formed by a cylinder 71 and a piston 72, and three narrow ring-shaped concave portions 72 defined by an O-ring 72d are formed on an outer peripheral surface of the piston 72.
a, 72b and 72c are provided. Also, as shown in FIG. 10, three port rows C, D,
E, and two port rows F and G whose positions are shifted so as to face almost the middle of these, are formed.

Now, when the piston 72 is pushed inward via the piston rod 70b, the ports F and C, and the ports G and D are communicated as shown in FIG. Conversely, when the piston 72 is pulled out,
As shown in FIG. 10, the ports F and D are communicated with each other, and the ports G and E are communicated with each other. That is, port F changes from port C to port D, and port G changes from port D to port E.
Is switched to

For example, when the belt 1 travels in a predetermined direction, the direction detecting sensor 6 of the traveling direction detecting device 60
The running direction of the belt 1 is switched when the piston 72 is pulled out through the connecting bar 60b by the mechanical force generated at 0a and the port F is connected to the port D and the port G is connected to the port E. Piston 7 by connecting bar 60b
When port 2 is pushed in, port F is connected to port C and port G is connected to port E, and the water supply path of pressurized water W to hydraulic cylinder device 90 and pressurized water W from hydraulic cylinder device 90
Of the hydraulic cylinder 8
Is in the opposite direction.

The meandering device for correcting the meandering of the hydraulic belt conveyor according to the present invention varies depending on the length, width and transportation of the belt conveyor, but is usually installed at a constant pitch, for example, every 15 to 25 m, so that the meandering of the entire belt conveyor is improved. Can always be eliminated. Although description is omitted here, it is desirable that the industrial water W serving as the water source S be clean water from which impurities have been removed through a purification device or the like.

Next, the operation of the hydraulic belt conveyor meandering correction device according to the present invention will be described. Referring to FIG. 1, it is assumed that the belt 1 of the belt conveyor apparatus is traveling in the direction of arrow A and the belt 1 is traveling in a straight line without meandering. In this case, the two meandering detection devices 40a and 4a
0b is in a non-contact state with the end of the belt 1, and as a result, the two flow path control devices 50a and 50b
b is also in an inactive state. That is, both switching valves 19
The spool of _No. 20 is held at an offset position by spring elasticity, and ports A ₁ -P ₁ and ports B ₁ -T
₁ and port A ₂ -P _2, Port B ₂ -T ₂ is closed, the two switching valves 19, 20 is in a fully closed state. Therefore, water W from the water source S such as industrial water having a water pressure of 3 to 5 kg / cm ² is not supplied to the flow path switching control device 70 and the hydraulic cylinder device 90.

Since the belt 1 travels in the direction of arrow A, the direction detecting sensor 60a of the traveling direction detecting device 60
Generates a mechanical force in the direction of arrow A, whereby the piston rod 70b of the switching valve 70a of the flow path switching control device 70 is pulled out in the direction of arrow A ', and the port F-
D and ports GE are in communication with each other. However, since the pressurized water W is not supplied from the water source S, the pressure difference between the piston front chamber 22 and the piston rear chamber 23 of the hydraulic cylinder 8 becomes almost negligible, and as a result, the meandering adjusting roller device 80 becomes neutral. Position (ie, the axis φ of the adjusting roller 4)
_R is to be held in substantially perpendicular shape a position) and the axis phi _C in the longitudinal direction of the belt 1.

Now, when the load L is loaded on the belt 1 as shown in FIG. 11, the belt 1 meanders in the direction of arrow B due to the uneven distribution of the load. The touch roller 11 and the switching valve 19 of the first flow path control device 50a are operated, and the ports A ₁ -P ₁ and the ports B _1-
T ₁ is turned on.

The flow path switching valve 70a of the flow path switching control device 70 is provided with a direction detecting sensor 60a of the traveling direction detecting section 60.
And the ports FD and G-
E are communicated with each other. As a result, the pressurized water W from the water source S flows in the pipe line 100 in the direction of the arrow, the piston rod 9 of the hydraulic cylinder device 90 is pushed out, and the meandering adjusting roller device 80 is rotated counterclockwise. That is, the axis φ of the adjusting roller 4 of the meandering adjusting roller device 80
_R becomes a state in which the angle α inclined to the axis phi _C of the belt 1, belt 1 thereby meandering of the arrow B direction is the arrow B 'direction (center position) traveling position of the navel is returned. The meandering of the belt 1 is corrected, and the touch roller 11
Is released from the side of the belt 1, the switching valve 19 is switched to the offset position by the elasticity of the spring, and the supply of the pressurized water to the rear chamber 23 of the hydraulic cylinder 8 is stopped.
The discharge of the pressurized water from the front chamber 22 of the hydraulic cylinder 8 stops. Therefore, the piston rod 9 of the hydraulic cylinder 8
Stops at that position, and the mounting frame 3 of the carrier roller 4 holds that position until the touch roller 11 or 12 operates again.

From this state, when the running direction of the belt 1 is now switched in the direction of arrow A 'as shown in FIG. 12, the direction detecting sensor 60a of the running direction detecting device 60 causes the belt 1 to rotate.
Of the piston rod 7 of the flow path switching valve 70a.
0b in the direction of arrow A. As a result, the port F of the flow path switching valve 70a is switched to the port C, and the port G is switched to the port D.
Is distributed.

As a result, the piston rod 9 of the hydraulic cylinder device 90 is operated in the retracting direction (the direction of arrow A),
Thus, the meandering adjusting roller device 80 is rotated clockwise. Consequently axis phi _R of the adjustment roller 4 'will have a belt 1, the running position of the arrow B' and the axis phi _C of the belt 1 the inclination angle α moves in the direction (toward the center) of Will be. That is, even if the running direction of the belt 1 is switched during the meandering correction of the belt 1, the meandering correcting operation automatically operates on the belt 1.

FIGS. 13 and 14 correspond to FIGS.
2 shows the meandering correction operation of the belt 1 when the load L is loaded on the other side of the belt 1, the meandering direction of the belt 1 changes, and the second meandering detection device 40 b and the second meandering detection device 40 b
The other operations are the same as those in FIGS. 13 and 14 except that the flow path control device 50b operates, and thus the description thereof is omitted here.

[0035]

According to the meandering correction device for a hydraulic belt conveyor of the present invention, the belt conveyor detects a change in the running direction of the belt and generates a mechanical driving force corresponding to the running direction of the belt. A traveling direction detection device, a flow path switching control device for switching between a water supply path for pressurized water supplied to the hydraulic cylinder device by a driving force of the traveling direction detection device and a drainage path for pressurized water from the hydraulic cylinder device, and a belt 1 Even if the running direction of the belt 1 is changed during the automatic meandering correction, the meandering adjustment roller device is automatically moved in the reverse direction, and is maintained at a position where the belt meandering correction operation can be performed. . As a result, if the running direction of the belt is switched while correcting the meandering of the belt, as in the conventional hydraulic self-aligning device, the inconvenience that the meandering is increasingly amplified is completely eliminated, and the stable belt is always stabilized. Automatic meandering correction of the conveyor can be performed. In the meantime, the hydraulic belt conveyor meandering correction device of the present invention uses the water pressure of industrial water as a driving source, which eliminates the need for electricity and hydraulic pressure, which not only reduces the equipment cost, but also reduces the cost in a bad environment of dust atmosphere. Even if there is, it can be used almost maintenance-free. The present invention has excellent practical utility as described above.

[Brief description of the drawings]

FIG. 1 is a plan view showing an entire configuration of a hydraulic belt conveyor meandering correction device according to the present invention.

FIG. 2 is a front view showing a mounting state of a meandering detection device and a flow path control device.

FIG. 3 is a front view showing a mounting state of a meandering adjustment roller device and a hydraulic cylinder device.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a front view showing a case where a meandering adjusting roller device and a hydraulic cylinder device are disposed on a side opposed to a return roller with a belt interposed therebetween.

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a plan view showing a mounting state of a belt traveling direction detecting device and a flow path switching device.

FIG. 8 is a front view showing a mounting state of a belt traveling direction detecting device and a flow path switching device.

FIG. 9 is a schematic vertical cross-sectional view when a piston of a flow path switching valve, which is a main part of the flow path switching device, is pushed.

FIG. 10 is a schematic vertical cross-sectional view of the flow path switching valve when the piston is pulled out.

FIG. 11 is an explanatory diagram showing an operation state of the hydraulic belt conveyor meandering correction device according to the present invention (when the belt traveling direction is the direction of arrow A).

FIG. 12 is an explanatory view showing an operation state of the hydraulic belt conveyor meandering correction device according to the present invention (when the belt traveling direction is the direction of arrow A ').

FIG. 13 is an explanatory view showing another operation state of the hydraulic belt conveyor meandering correction device according to the present invention (when the belt traveling direction is the direction of arrow A).

FIG. 14 is an explanatory view showing an operation state of the hydraulic belt conveyor meandering correction device according to the present invention (when the belt traveling direction is the direction of arrow A ′).

FIG. 15 is a schematic plan view of a known hydraulic belt conveyor meandering correction device.

FIG. 16 is a schematic front view of a known hydraulic belt conveyor meandering correction device.

FIG. 17 is an operation explanatory view of a known hydraulic belt conveyor meandering correction device.

[Explanation of symbols]

S ... water source (3-5 kg / cm ² for industrial water), W ... water (working fluid), phi _R ... axial center of the adjustment main roller, the axis of phi _C ... belt, α · α '... φ _R and phi Intersecting angle of _C , L: Load, 1 ... Belt of belt conveyor device, 2 ... Fixed frame, 3 ... Mounting frame, 4 ... Adjustment roller, 5 ... Rotary shaft, 6 ... Side rail, 7 Operation lever, 8 ... Hydraulic cylinder, 9: piston rod, 10: return roller, 11/12: touch roller, 13/14: mounting arm, 15/16: rotary shaft, 17/18: arm, 19/20: switching valve, 21
... water supply pipe, 22 ... piston front chamber, 23 ... piston rear chamber, 24/25 ... drain pipe, 26/27 ... throttle valve, 40a
... 1st meandering detecting device, 40b ... 2nd meandering detecting device, 50
a: first flow path control device, 50b: second flow path control device, 6
0: belt traveling direction detecting device, 60a: direction detecting sensor, 60b: connecting bar, 60c: support shaft, 60d: stopper, 60e: spring, 70: flow path switching device, 7
0a: flow path switching valve, 70b: piston rod, 70c ...
Pin, 71 ... cylinder, 72 ... piston, 72a ・ 7
2b, 72c: concave portion, 72d: O-ring, 80: meandering adjustment roller device, 90: hydraulic cylinder device, 100: feed / drain passage.

Claims (3)

[Claims] 1. A meandering adjusting roller device for correcting meandering of a belt by adjusting a crossing angle α between a shaft center of a belt and a shaft center of an adjusting roller; And a second meandering detection device that generates a mechanical driving force by abutting the belt ends, and is operated by the mechanical driving force of the two meandering detection devices to open a water supply channel and a drainage channel. A first flow path control device and a second flow path control device, and pressurized water is supplied to a hydraulic cylinder through a water passage of the first flow path control device or the second flow path control device, and pressurized water is discharged from the hydraulic cylinder through a drain passage. Discharge,
A hydraulic cylinder device for rotating the meandering adjusting roller device in a direction for correcting the meandering of the belt; A belt traveling direction detecting device is provided, and a passage switching device is provided in a feed / drain passage that connects the first flow path control device and the second flow passage control device to the hydraulic cylinder device, and a belt traveling direction is detected. At the time of switching, the flow path switching device is actuated by the mechanical driving force generated by the belt traveling direction detecting device to switch the direction of the supply of pressurized water to the hydraulic cylinder device and the direction of drainage of the pressurized water from the hydraulic cylinder device, thereby adjusting the meandering. A meandering correction device for rotating a hydraulic belt conveyor, wherein the roller device is rotated in a direction opposite to the direction before the switching of the belt running direction. 2. A connecting device comprising: a direction detecting sensor that slides on a running belt; a connecting bar having one end fixed to the direction detecting sensor; a support shaft that supports an intermediate portion of the connecting bar; 2. The hydraulic belt conveyor meandering correction device according to claim 1, wherein a stopper that regulates a movement range of the bar and a spring that presses the direction detection sensor toward the belt are formed. 3. A flow path switching device comprising: a cylinder in which three port rows and two port rows are formed so as to be shifted from each other; and three ring-shaped recesses formed in an outer peripheral surface. A flow path switching valve of a piston type formed from a piston that has been formed and a piston rod that protrudes outward from the cylinder, and turns the tip of the piston rod of the flow path switching valve and the tip of the connection bar of the belt traveling direction detection device. The meandering correction device according to claim 1, wherein the device is movably connected.