JP2872194B2 - Fixed shaft mounted braking system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is rotatably supported via a bearing on a fixed shaft mounted for rotation impossible
The present invention relates to a fixed shaft-mounted braking device that brakes a driven wheel and a free roller .

2. Description of the Related Art A band brake, a disc brake, an electromagnetic brake, or the like is applied as a braking device for a vehicle, and the braking device for a vehicle is generally incorporated in a portion of a wheel on a vehicle body side. . Also, heavy goods transport vehicles that transport heavy goods at steelworks and the like are equipped with large and heavy wheels, and a braking device for transferring heavy goods needs to be able to exert a strong braking force.

[0002] On the other hand, a steel mill or the like is provided with a number of roller conveyors for transporting steel materials. The roller conveyors are usually operated by operating a brake mechanism attached to an electric motor for driving a driving roller. It is designed to brake, but as a braking device that brakes the free roller in the roller conveyor, a hydraulic drum brake that was conventionally built inside the free roller, or a free roller and a fixed shaft was attached to the shaft end side part Various braking devices are applied.

On the other hand, Japanese Patent Application Laid-Open No. 7-259897 discloses a braking device for braking a free roller of a roller conveyor in a printing machine, a paper machine, a processing machine for film, paper, metal foil, etc. A surface to be braked is formed on the inner peripheral surface of the annular member, and an annular inflatable member that expands by air pressure is incorporated between the surface to be braked and the annular member on the fixed shaft side. A braking device that supplies compressed air to brake a free roller is described.

[0004]

In the conventional vehicle braking device, since it is incorporated into a portion of the wheel on the vehicle body side (a portion inside in the vehicle width direction), a great deal of time is required when assembling or repairing the braking device. There is a problem that requires much labor. Then, from the viewpoint of assembling and repairing the braking device, it is not desirable to form the braking device in an annular structure, and the degree of freedom in designing the braking device is restricted. In a conventional hydraulic braking device, one or two actuators are generally provided as actuators, and the braking force cannot be increased so much.

[0005] Even in the case of a conventional braking device for directly braking rollers in a roller conveyor, it is difficult to equip a large number of actuators of the braking device, and usually only one or two actuators are provided, so that the braking force is made too large. Can not do. In many cases, a hydraulic cylinder is applied as an actuator of a braking device.However, when a cylindrical hydraulic cylinder having a normal shape is applied, there is a restriction in terms of enhancing a braking force. Then, a large hydraulic cylinder is required. If the hydraulic pressure supplied to the hydraulic cylinder is set high in order to increase the braking force, a hydraulic leak is likely to occur. An object of the present invention, the solid
In a fixed-axis mounting type braking device, the assembling and repair are facilitated, the braking force is increased without increasing the size of the device, and the structure of the actuator is simplified.

[0006]

According to a first aspect of the present invention, there is provided a fixed-shaft-mounted braking device rotatably supported via a bearing on a fixed shaft non-rotatably mounted on a vehicle body of a heavy load carrier .
In a braking device for braking a driven wheel , an annular braking surface facing outward in a vehicle width direction orthogonal to the axis of the fixed shaft is formed on the driven wheel at a position corresponding to the shaft end side of the fixed shaft, and The shaft is provided with an annular braking member capable of making surface contact with the surface to be braked, and four or more actuators for driving the braking member toward the surface to be braked. When braking the driven wheel , four or more actuators are operated to drive the braking member toward the surface to be braked, and the braking is performed by bringing the braking member into surface contact with the surface to be braked. Since four or more actuators are provided and the braking force is generated by these actuators, the braking force can be significantly enhanced, and the braking performance can be enhanced.

Moreover, since four relatively small actuators can be arranged in a ring, the size of the braking device does not increase. Further, at a position corresponding to the shaft end side of the fixed shaft, a driven surface is formed on the driven wheel, which is an outer surface in the vehicle width direction that is orthogonal to the axis of the fixed shaft, and the braking member The brake device is also provided at a position on the shaft end side of the fixed shaft, so that assembly and repair of the braking device can be easily performed .

[0008] In a second aspect of the present invention, in the first aspect, the actuator is a hydraulic cylinder. Since the braking force can be generated by four or more hydraulic cylinders, the braking force can be remarkably enhanced, and the individual hydraulic cylinders can be small, so that the braking device does not increase in size and the hydraulic pressure supplied to the hydraulic cylinders Can also be set relatively low, which is advantageous in terms of preventing hydraulic leaks, and the hydraulic supply system for the four hydraulic cylinders can also have a relatively simple configuration.

[0009] fixed shaft-mounted brake apparatus according to claim 3, b
A braking device for braking a free roller rotatably supported via a bearing on a fixed shaft non-rotatably mounted on a frame of a roller conveyor , wherein the free roller is positioned at a position corresponding to the shaft end side of the fixed shaft. An annular braking member having a cone-shaped braking surface having a diameter that increases as approaching the shaft end of the fixed shaft on the inner surface thereof, and the fixed shaft having a cone-shaped braking surface capable of making surface contact with the braking surface. And one annular hydraulic cylinder for driving the braking member toward the surface to be braked.

In the case of braking with this braking device, one annular hydraulic cylinder is driven to drive the braking member toward the surface to be braked, and a cone-shaped braking surface of the braking member is formed on the inner surface of the free roller. The surface is brought into surface contact with the braking surface (the diameter increases as approaching the shaft end). The axial pressing force of the braking member is
Since the signal is amplified and acts on the surface to be braked, the braking force can be significantly enhanced. Further, the annular hydraulic cylinder can generate a strong pressing force due to its large pressure receiving area in spite of its small size, so that the hydraulic cylinder can be remarkably downsized while securing a strong braking force. Further, the hydraulic pressure supplied to the hydraulic cylinder can be set relatively low, which is advantageous in preventing hydraulic leakage. In addition, since a cone-shaped surface to be braked is formed on the inner surface of the free roller at a position corresponding to the shaft end of the fixed shaft, the braking device can be easily assembled and repaired.

[0011] The fixed-shaft-mounted braking device according to claim 4 is characterized in that
Fixed non-rotatably on the conveyor frame
Free rollers rotatably supported on shafts via bearings
A braking device for braking the
At the corresponding position, a ring that is orthogonal to the axis of the fixed shaft
Form a braking surface facing outward in the axial direction of the
An annular braking member that is capable of surface contact with the surface to be braked,
Four or more actuators to drive the braking member towards the braked surface
An eta is provided.

When braking the free rollers, four or more
Actuate the actuator to move the braking member toward the braked surface.
To bring the braking member into surface contact with the surface to be braked.
To brake. Provide four or more actuators and
Since these actuators generate braking force,
The power can be significantly enhanced and the braking performance can be improved.
Moreover, four relatively small actuators are arranged in a ring.
Since it can be installed, the size of the braking device does not increase. Ma
At the position corresponding to the shaft end of the fixed shaft,
An annular shaft that is perpendicular to the axis of the fixed axis and that faces outward in the axial direction
A moving surface is formed, and a braking member is also provided at the shaft end side of the fixed shaft.
This makes it easy to assemble and repair the braking device.
Wear.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a fixed shaft-mounted braking device according to the present invention will be described with reference to the drawings. FIG. 1 shows a driven wheel 1 of a heavy goods transporting vehicle for transferring heavy goods in a steel mill or the like, and a fixed shaft-mounted braking device 2 for braking the driven wheel 1. An axle 3 is attached to a vehicle body 4. The axle 3 is fixed so as not to rotate, and protrudes laterally from the side of the vehicle body 4, and the driven wheel 1 via a pair of bearings 5 is rotatably connected to the axle 3.
It should be noted that only the driven wheel 1 on one side and its braking device 2 are shown since the heavy load carrier has a symmetrical structure.

The driven wheel 1 is mainly composed of a steel wheel 6 and a solid tire 7 fixed to the outer peripheral side thereof. However, a wheel of a type in which pressurized air is filled may be used.
A pair of bearings 5 and spacers 8 to 11 are mounted between the inner peripheral surface of the wheel 6 and the axle 3, and the inner bearing 5 in the vehicle width direction is prevented from falling off by a ring member 12.

Next, the braking device 2 will be described. At a position corresponding to the outer end of the axle 3 in the vehicle width direction, the wheel 6 has an annular surface 13 orthogonal to the axis of the axle 3, A fixed annular member having a friction coefficient having a large friction coefficient and excellent in wear resistance is provided.
A braked surface 15 orthogonal to the axis of the axle 3 is formed on the outer surface of the braked portion 14. The portion to be braked 14 is the annular surface 1
3 are integrally fixed. An annular braking block 16 is externally fitted to the axle 3, and is fastened and fixed between the spacers 10 and 11 and the nut 17 by fastening a nut 17 to the screw shaft portion 3a. And is non-rotatably fitted to the axle 3 through the shaft.

An annular braking member 18 made of a friction material having excellent wear resistance and a large friction coefficient is disposed between the braking block 16 and the braking surface 15, and is bravely fitted on the axle 3,
Inside the brake block 16, for example, six double-acting hydraulic cylinders 19 are provided at equal intervals in the circumferential direction, and the ends of the rod portions of the piston members of these hydraulic cylinders 19 are fixed to the braking member 18. The six forward oil chambers 19a of the hydraulic cylinder 19 communicate with each other through an oil passage in the brake block 16, and are connected to a hydraulic supply unit provided on the vehicle body through an oil passage 20a in the axle 3. The six return oil chambers 19b of the hydraulic cylinders 19 are connected to each other via an oil passage in the brake block 16 and connected to a hydraulic supply unit provided on the vehicle body via an oil passage 20b in the axle 3. ing. These six hydraulic cylinders 19
Thus, the braking is performed by pressing the braking member 18 against the surface to be braked 15, and the braking is released by separating the braking member 18 from the surface to be braked 15.

The operation and effect of the braking device 2 described above will be described. When assembling the wheels, first, the driven wheel 1, the pair of bearings 5 and the spacers 8 and 9 are mounted on the axle 3, and then the spacer 10 is mounted. , 11 are fitted, then the braking member 18 and the braking block 16 are mounted on the axle 3, and the nut 17 is fastened so that the braking device 2 can be mounted on the axle 3. When repairing the braking device 2, without removing the driven wheel 1 from the axle 3, remove the braking device 2 in the opposite procedure to the above, and repair or replace parts as necessary. It can be assembled in the same procedure as described above. Thus, the mounting and repair of the braking device 2 can be easily performed.

Further, since the braking member 18 is pressed against the braking surface 15 by the six hydraulic cylinders 19,
A large braking force can be generated. Since six hydraulic cylinders 19 are provided, it is not necessary to set the hydraulic pressure supplied to the hydraulic cylinders 19 too high, which is advantageous in preventing hydraulic leakage. In addition, since six relatively small hydraulic cylinders 19 can be annularly arranged, the brake device 2 does not increase in size. The number of hydraulic cylinders 19 is not limited to six, and may be six or more.
9 may be provided. If the number of hydraulic cylinders 19 is less than four, it is difficult to enhance the braking force with relatively low hydraulic pressure, so it is necessary to provide four or more hydraulic cylinders 19. The axle 3 corresponds to a fixed shaft, the vehicle body 4 corresponds to a machine frame, the driven wheel 1 corresponds to a rotating member, and the hydraulic cylinder 19 corresponds to an actuator.

Next, another embodiment 1 will be described with reference to FIG. A fixed shaft-mounted braking device 32 for braking a free roller 31 in a roller conveyor 30 for transporting a steel material at an ironworks will be described. However, since the roller conveyor 30 has a symmetrical structure, only one side is shown. Both ends of the horizontal roller shaft 33 are non-rotatably supported by a pair of frames 34, and the free roller 31 is rotatably supported by the roller shaft 33 via a pair of bearings 35. The bearing 35 is prevented from falling off by retaining rings 36 and 37.

Next, the braking device 32 will be described.
At a position corresponding to the end portion of the roller shaft 33, a steel annular member 38 is fitted inside the end portion of the free roller 31 and is fixed to the free roller 31 with a plurality of pins 39 so as to be relatively non-rotatable. A damped portion 40 made of a friction material having a high friction coefficient and excellent wear resistance is integrally and strongly fixed to the outer end surface of the annular member 38, and a roller is attached to the outer end surface of the damped portion 40. An annular braked surface 40a orthogonal to the axis of the shaft 33 is formed.

On the outer peripheral portion of the end portion of the roller shaft 33, for example, eight spline grooves 41 and an annular groove 42 connected to the inner ends of the spline grooves 41 are formed, and have a high friction coefficient and excellent wear resistance. Annular braking member 43 made of friction material
Is externally fitted to the roller shaft 33, the inner peripheral base of the braking member 43 is axially movably engaged with the eight spline grooves 41, and the inner end of the inner peripheral base projects into the annular groove 42. And, it is configured to be able to contact two annular disc springs 44 mounted in the annular groove 42.

An annular brake block 45 is externally fitted to the roller shaft 33 between the brake member 43 and the frame 34, and its inner base is engaged with the eight spline grooves 41. , Four single-acting hydraulic cylinders 46 are provided at equal intervals in the circumferential direction, for example, in parallel with the roller shaft 33, and piston rods integral with the pistons 46 a of the hydraulic cylinders 46 abut against the braking member 43.
The oil chambers of the hydraulic cylinders 46 communicate with each other via an oil passage in the brake block 45, and the oil chambers are connected to an external hydraulic supply unit via an oil passage 47. In a state in which the hydraulic pressure is not supplied to the hydraulic cylinder 46, the braking member 43 is urged by the disc spring 44, the braking surface 43a of the braking member 43 is separated from the braking surface 40a by about 2 mm, and the piston rod is retracted. .

The fixed shaft-mounted braking device 32 described above.
The function and effect of the method will be described. When braking the free roller 31, when hydraulic pressure is supplied to the oil chamber of the hydraulic cylinder 46, the braking member 43 is moved toward the braking surface 40 a against the urging force of the disc spring 44, and the braking surface 43 a Is in frictional contact with the braking surface 40a, so that the free roller 31 is braked. When the braking of the free roller 31 is released, if the oil pressure in the oil chamber is drained, the biasing force of the disc spring 44 separates the braking member 43 from the braking surface 40a, and the piston rod retreats to the state shown in the figure. become.

When the braking device 32 is assembled with the free roller 31 removed from the frame 34, the annular member 38 is first assembled into the free roller 31, and a plurality of pins 39 are fitted to fix the annular member 38. Then, the disc spring 44, the braking member 43, and the braking block 45 are sequentially assembled, and then the free roller 31 is mounted on the frame 34,
The oil passage 47 is connected to a hydraulic supply unit. Braking device 32
When repairing is performed, the braking device 32 can be disassembled in the opposite manner, and parts can be replaced as necessary, and then assembled in the same manner as described above.

As described above, the assembly and repair of the braking device 32 can be easily performed. Moreover, since the braking member 43 is pressed by the four hydraulic cylinders 46,
A large braking force can be generated. Further, since the four hydraulic cylinders 46 are provided, it is not necessary to increase the hydraulic pressure supplied to the hydraulic cylinders 46 too much, which is preferable in terms of suppressing hydraulic leakage. If the number of hydraulic cylinders 46 is less than four, it is difficult to sufficiently increase the braking force with a moderate hydraulic pressure that is not too high. Therefore, it is necessary to provide four or more hydraulic cylinders 46. In addition, since the brake block 45 is received by the frame 34, a member for fixing the brake block 45 to the roller shaft 33 is omitted to simplify the structure, reduce the overall length of the roller shaft 33, and reduce the length of the roller conveyor 30. The width can be made as small as possible. The roller shaft 33 corresponds to a fixed shaft, the free roller 31 corresponds to a rotating member, the hydraulic cylinder 46 corresponds to an actuator, and the frame 34 corresponds to a machine frame.

Next, another embodiment 2 will be described with reference to FIG. A fixed shaft-mounted braking device 52 for braking a free roller 51 in a roller conveyor 50 for transporting a steel material at an ironworks will be described. However, since the roller conveyor 50 has a symmetrical structure, only one side is shown. Both ends of the roller shaft 53 are non-rotatably supported by a pair of frames 54, and the roller shaft 53 has a pair of bearings 5.
5, a free roller 51 is rotatably supported. Note that the bearing 55 is prevented from falling off by retaining rings 56 and 57.

Next, the braking device 52 will be described.
At a position corresponding to the end of the roller shaft 53, a cone-shaped cone surface 51 a having a diameter increasing toward the shaft end of the roller shaft 53 is formed inside a predetermined length of the end of the free roller 51. The surface of the cone surface 51a has a thickness of about 2 made of a friction material having a large friction coefficient and excellent wear resistance.
A braked portion 58 of about mm is integrally fixed, and a cone-shaped braked surface 58a whose diameter increases as it approaches the shaft end of the roller shaft 53 is formed on the surface of the braked portion 58. A cone-shaped braking surface 59 that can make surface contact with the braking surface 58a
An annular braking member 59 having a is externally fitted to the roller shaft 53 so as to be movable in the axial direction.

The surface of the braking member 59, which forms the braking surface 59a, is made of a friction material having a large friction coefficient and excellent wear resistance. Four key grooves 60 are formed on the outer periphery of the roller shaft 53, and four key grooves 61 are formed on the inner periphery of the braking member 59.
A key 62 is mounted in each of the key grooves 60 and 61. Each key 62 is fixedly fitted in the key groove 60 and is loosely fitted in the key groove 61 so as to be relatively movable. 53 is configured to be able to move a predetermined stroke in the axial direction.

One annular hydraulic cylinder 63 for driving the braking member 59 toward the braking surface 58a is
3, a cylinder body 64 fitted inside the cylinder body 64 in an oil-tight manner, an annular piston 65 fitted inside the cylinder body 64 and slidably fitted on the roller shaft 53 in an oil-tight manner, and a roller extending from the piston 65. A cylindrical piston rod 66 slidably fitted on the shaft 53 and integrally formed with the braking member 59; a forward oil chamber 67a formed in the cylinder body 64; And a chamber 67b. The outer end surface of the cylinder body 64 is restricted in position by the roller shaft 53 by the retaining ring 68, and the forward oil chamber 67a and the backward oil chamber 6
Reference numeral 7b is connected to a hydraulic pressure supply unit through oil passages 69a and 69b. The end of the roller shaft 53 is supported by a frame 54.

The fixed shaft-mounted braking device 52 described above.
The function and effect of the method will be described. When braking the free roller 51, the hydraulic pressure in the backward oil chamber 67b is drained, and the hydraulic pressure is supplied to the forward oil chamber 67a, so that the piston 65 pushes the braking member 59 toward the brake surface 58a. Braking surface 5
9a comes into frictional contact with the braking surface 58a, so that the free roller 51 is braked. Piston 65 for braking member 59
From the cone-shaped braking surface 59a to the braking surface 58a.
a, the braking surface 59a is strongly pressed by the braking surface 58a, and a strong braking force is generated.
When the braking is released, the hydraulic pressure in the forward oil chamber 67a is drained, and the hydraulic pressure is supplied to the backward oil chamber 67b.
9 retreats outward, and the braking surface 59a is separated from the braking surface 58a.

When assembling the braking device 52, a portion to be braked 58 is formed in advance on the free roller 51, and the key 62, the hydraulic cylinder 63 and the braking member 59 are mounted when the free roller 51 is not mounted on the frame 54. ,
It is only necessary to mount the retaining ring 68 and then attach it to the frame 54.When repairing the braking device 52, it is easy to disassemble the reverse, replace parts as necessary, and then Can be assembled. Thus, the braking device 5
2 can be easily assembled and repaired. Since the hydraulic cylinder 63 has an annular structure and the pressure receiving area of the piston 65 is large, the driving force of the hydraulic cylinder 63 can be sufficiently increased with a relatively low pressure hydraulic pressure. Hydraulic leaks are less likely to occur. Note that the piston rod 66 may be formed separately from the braking member 59 and then integrally fixed. The roller shaft 53 corresponds to a fixed shaft, the free roller 51 corresponds to a rotating member, and the frame 54 corresponds to a machine frame.

[0032]

According to the first aspect of the present invention, a heavy object is conveyed.
In a braking device that brakes the driven wheels of a car,
A driven surface is formed on the driven wheel at a position corresponding to the shaft end side of the fixed shaft, the surface being directed to an outer side in the vehicle width direction orthogonal to the axis of the fixed shaft. An annular braking member which can be contacted, and which drives the braking member toward the surface to be braked;
Since there is provided more than three and an actuator, heavy transport vehicle
The braking force can be significantly enhanced, it is possible to improve the braking performance. In addition, since four or more relatively small actuators can be arranged in a ring, the size of the braking device does not increase. In addition, at the position corresponding to the shaft end side of the fixed shaft, the driven wheel forms an annular surface to be braked facing the outside in the vehicle width direction orthogonal to the axis of the fixed shaft, and the braking member is also formed on the shaft end side of the fixed shaft. Since the brake device is provided at the portion, assembly and repair of the braking device can be easily performed.

According to a second aspect of the present invention, the actuator is a hydraulic cylinder. Since the braking force can be generated by four or more hydraulic cylinders, the braking force can be remarkably enhanced, and the individual hydraulic cylinders can be small, so that the braking device does not increase in size and the hydraulic pressure supplied to the hydraulic cylinders Can also be set relatively low, which is advantageous in terms of preventing hydraulic leaks, and the hydraulic supply system for the four hydraulic cylinders can have a relatively simple configuration. The other effects are the same as those of the first aspect.

According to the third aspect of the present invention, as described above,
A braking device that brakes the free rollers of the roller conveyor
The free roller at the position corresponding to the shaft end of the fixed shaft.
On the inner surface, a cone-shaped covering whose diameter increases as it approaches the shaft end of the fixed shaft
Since the braking surface is formed, the axial pressing force of the braking member is amplified and acts on the surface to be braked, so that the braking force can be significantly enhanced. In addition, since one annular hydraulic cylinder can generate a strong pressing force due to a large piston pressure receiving area while being small, the hydraulic cylinder can be significantly reduced in size while securing a strong braking force. Further, since the hydraulic pressure supplied to the hydraulic cylinder can be set relatively low, it is also advantageous in preventing hydraulic leakage. In addition, since a cone-shaped surface to be braked is formed on the inner surface of the free roller at a position corresponding to the shaft end side of the fixed shaft, the braking device can be easily assembled and repaired.

According to the invention of claim 4, as described above,
A braking device that brakes the free rollers of the roller conveyor
And provide four or more actuators and
Since the braking force is generated by the tutor, the braking force is significantly increased
It can be strengthened and the braking performance can be improved. Moreover, the ratio
Four relatively small actuators can be arranged in a ring
Therefore, the size of the braking device does not increase. In addition, fixed shaft
At the position corresponding to the shaft end, the free roller is
Form a braking surface that faces outward in the direction of the longitudinal axis
However, since the braking member is also provided at the shaft end side of the fixed shaft,
Assembly and repair of the moving device can be easily performed.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a main part of a driven wheel and a braking device of a heavy load carrier according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an essential part of a roller conveyor free and its braking device according to another embodiment 1.

FIG. 3 is a longitudinal sectional view of a main part of a roller conveyor free and its braking device according to another embodiment 2.

[Description of Signs] 1 Followed wheel 2 Braking device 3 Axle 4 Body 15 Braking surface 16 Braking block 18 Braking member 19 Hydraulic cylinder 30 Roller conveyor 31 Free roller 32 Braking device 33 Roller shaft 34 Frame 40 Braking portion 40a Braking surface 43 Braking Member 45 Braking Block 46 Hydraulic Cylinder 50 Roller Conveyor 51 Free Roller 52 Braking Device 54 Frame 58 Braked Part 58a Braked Surface 59 Braking Member 59a Braking Surface 63 Circular Hydraulic Cylinder

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60T 1/06 B65G 13/075 F16D 55/10

Claims (4)

(57) [Claims] 1. A slave rotatably supported via a bearing on a fixed shaft mounted non-rotatably to the body of heavy transport vehicle
A braking device for braking a driving wheel , wherein the driven wheel is provided with an annular braking surface directed outward in the vehicle width direction orthogonal to the axis of the fixed shaft at a position corresponding to the shaft end side of the fixed shaft; A fixed-shaft-mounted braking device, comprising: an annular braking member capable of making surface contact with the surface to be braked; and four or more actuators for driving the braking member toward the surface to be braked. 2. The fixed-shaft-mounted braking device according to claim 1, wherein the actuator is a hydraulic cylinder. 3. A braking device for braking a free roller rotatably supported via a bearing on a fixed shaft non-rotatably mounted on a frame of a roller conveyor, the braking device being provided at a position corresponding to a shaft end side of the fixed shaft. A ring-shaped brake having a cone-shaped braking surface whose diameter increases as approaching the shaft end of the fixed shaft on the inner surface of the free roller , and a cone-shaped braking surface capable of making surface contact with the braking surface on the fixed shaft; A fixed shaft-mounted braking device, comprising: a member; and one annular hydraulic cylinder that drives the braking member toward a surface to be braked. (4) Roller conveyor frame cannot rotate
It is rotatably supported via a bearing on the attached fixed shaft.
In the braking device that brakes the free roller, At the position corresponding to the shaft end side of the fixed shaft, it is fixed to the free roller.
An annular shaft that is perpendicular to the axis of the fixed axis and that faces outward in the axial direction
Forming a moving surface, An annular braking member that is in surface contact with the surface to be braked on the fixed shaft.
And four or more driving the braking member towards the surface to be braked
Fixed shaft mounting characterized by an actuator
Type braking device.