JP2948103B2 - Hairline processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hairline processing machine for performing a hairline processing on a work conveyed by a conveyor.

[0002]

2. Description of the Related Art A hairline processing machine for performing hairline processing on a work is provided with a conveyer for conveying the work and a sanding belt that is brought into contact with the work conveyed by the conveyor while running the work. A polishing mechanism for performing hairline processing is provided.

[0003]

In the conventional hairline processing machine, the conveyance of the conveyor and the running of the sanding belt of the polishing mechanism are individually controlled. As a result, the sanding belt may stop running even though the work is being conveyed by the conveyor, or the sanding belt may be running while the work is not being conveyed. was there. In the former case, the abrasion of the sanding belt progresses locally, and only the abraded portion comes into contact with the work, resulting in uneven polishing of the work. In the latter case, the sanding belt has a portion that is not used for polishing, and that portion is wasted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to prevent the sanding belt from being locally worn or from causing a useless portion of the sanding belt that is not used for polishing. It is.

[0005]

Means for Solving the Problems As means for solving the above-mentioned problems, the invention of claim 1 comprises a conveyor for transporting a work in the form of a thin metal plate, and a winding roll while being fed from a feeding roll. A polishing mechanism for bringing a sanding belt traveling in one direction into contact with the work to perform hairline processing on the work, a position where the work is pushed from the back side to contact the sanding belt, and the work is A receiving roll capable of being displaced between a position to be separated from the sanding belt and a sensor for detecting a position of the work on a conveyance path, and traveling of the sanding belt based on a detection signal of the sensor. It is characterized in that the stop and the displacement operation of the receiving roll are controlled.

A second aspect of the present invention is characterized in that, in the first aspect of the present invention, the sensor is provided at two positions on both sides of the polishing position by the sanding belt on the transport path.

[0007]

According to the first aspect of the present invention, the position of the work conveyed by the conveyor is detected by the sensor, and based on the detection signal, when the work reaches a predetermined polishing position, the traveling of the sanding belt starts, and The running of the sanding belt stops when the work leaves the polishing position.

According to the second aspect of the present invention, when the workpiece is transported in one direction by the conveyor and polished, the position of the workpiece is detected by one sensor, and when the workpiece is transported and polished in the opposite direction. The position of the work is detected by the other sensor.

[0009]

According to the first aspect of the present invention, since the sanding belt can be run only when the work is at the polishing position, the sanding belt is locally worn and polishing of the work is not performed. It is possible to prevent the uniformity of the sanding belt and to prevent the useless portion of the sanding belt that is not used for polishing from occurring, thereby reducing the running cost.

According to the second aspect of the present invention, in addition to the above-described effects, the traveling state of the sanding belt can be controlled by detecting the position of the work when the work is transported in either the forward or reverse direction. Even when the workpiece is reciprocated and polished, it is possible to realize uniform polishing and a reduction in running cost.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the hairline processing machine according to the present embodiment includes a conveyor 10 that horizontally conveys a thin plate-shaped work (not shown), and detects a position of the work on a conveyance path of the conveyor 10.
A sensor 15A, 15B, a polishing mechanism 20 for performing a hairline process on a workpiece conveyed by the conveyor 10, and an oil draining device 100 for removing cleaning oil supplied to the workpiece during polishing by the polishing mechanism 20. It is configured.

The conveyor 10 is constituted by providing five pairs of upper and lower feed rolls 12A and 12B between a pair of frames 11 in a predetermined arrangement in the horizontal direction. These feed rolls 12A and 12B are arranged in two pairs on both sides of a polishing position by a later-described polishing mechanism 20 in the conveying direction of the conveyor 10, and are separated from the polishing mechanism 20 by an oil drainer 100 described later. A pair is arranged at the opposite position. The feed rolls 12A and 12B of each pair are configured to rotate interlockingly by engagement of gears (not shown), and the lower five feed rolls 12B of each pair are rotatable interlockably by a chain and sprockets (not shown). All the feed rolls 12B are connected to each other and are driven to rotate in the forward and reverse directions at the same peripheral speed by a single motor (not shown). The work is fixed in the forward direction (the right direction in FIG. 1) indicated by the arrow W in FIG. 1 and the reverse direction opposite to the arrow W in a state where the work is sandwiched between the feed rolls 12A and 12B in order. It is conveyed at the speed of. Further, the number of rotations of the feed rolls 12A and 12B is counted by a rotary encoder (not shown), and thereby the work transfer distance is detected. Then, sensors 15A, 15 described later are used.
Feeding roll 12 based on detection signal output from B
The direction and timing of conveyance of the conveyor 10 are controlled based on the rotation speeds of A and 12B.

The sensors 15A and 15B are provided on both sides of the polishing mechanism 20 at intermediate positions between two pairs of feed rolls 12A and 12B. These sensors 15A and 15B
This is called a photoelectric switch that irradiates light toward the pass area of the work, detects reflected light from the work, and converts the light into an electric signal, and the light emitting and receiving unit faces the upper surface of the work. . These sensors 15A and 15B
The position of the front edge and the position of the rear edge of the work are detected, and the detection signal is output to a control circuit (not shown).

The control circuit controls the direction and timing of conveyance of the conveyor 10 and a polishing mechanism 20 to be described later.
Control of the operation and stop of the oil drainage device 100, control of the operation of the oil drainage device 100 described later, and oil drainage rolls 120A, 120 described later.
B, 130A, and 130B are controlled.

Next, the polishing mechanism 20 will be described. As shown in FIG. 2, the polishing mechanism 20
A long sanding belt 22 fed from the feeding roll 21, a winding roll 23 for winding the sanding belt 22, and a sanding belt 22.
And a receiving roll 25 for contacting the workpiece with the workpiece. Further, it has a drive mechanism 30 for running the sanding belt 22, a tension mechanism 40 for tensioning the sanding belt 22, and a braking mechanism 50 for preventing the sanding belt 22 from running in the opposite direction.

As shown in FIGS. 4 and 5, the driving mechanism 30 includes a motor 31 for generating a rotational driving force in only one direction, and a reduction gear train (not shown) connected to the motor 31 through a coupling 32. And a speed reducer 33 in which is accommodated. A drive sprocket 34 is provided on the speed reducer 33, and a driven sprocket 35 is provided diagonally below and coaxially rotates with the contact roll 24, and a transmission sprocket is provided at a position adjacent to the winding shaft 23 </ b> A of the winding roll 23. 36 are provided. An endless chain 37 is wound around these sprockets 34, 35, 36. Thus, the rotational driving force of the motor 31 is transmitted to the contact roll 24.

The transmission sprocket 36 is provided with a transmission gear 38 which can rotate integrally with the transmission sprocket 36 via a torque limiter 60 described later. The transmission gear 38 rotates integrally with the winding shaft 23A. The transmission gear 39 is engaged with the transmission gear 39. Thereby, the motor 31
Is transmitted to the take-up roll 23. Then, the sanding belt 22 is moved by the rotation driving force transmitted to the contact roll 24 and the winding force transmitted to the winding roll 23 to the feeding roll 2.
2 and is wound in the winding roll 23 while traveling in one direction indicated by an arrow B in FIG. The traveling direction of the sanding belt 22 is the same as the forward conveyance direction of the work (the direction of the arrow W in FIG. 1) at the polishing position where the sanding belt 22 can be wound around the contact roll 24 and contact the work. In addition, sanding belt 22
Is set to be lower than the transport speed of the work.

The above-described transmission sprocket 36 and transmission gear 3
8 is provided with a torque limiter 60 interposed therebetween.
The structure shown in FIG. Transmission shaft 36 of transmission sprocket 36
A rotating body 61 integrally rotatably mounted on A is provided with a flange 62, and a driven ring in which a transmission gear 38 is fixed to a thin ring-shaped clutch plate 63 and an outer mounting flange 65 by bolts 66. 64, a thin ring-shaped clutch plate 67 and a pressing ring 68 are sequentially fitted. Then, due to the elastic expansion force of the disc spring 69, the clutch plates 63, 63 and the driven ring 64 are sandwiched in the axial direction between the flange 62 and the pressing ring 68. In the torque limiter 60, when the value of the transmission torque due to the load acting on the winding shaft 23A becomes larger than a certain value, slippage occurs on the contact surface between the driven ring 64 and the rotating body 61 with respect to the clutch plate 63.
As a result, the transmission of the rotational driving force from the transmission shaft 36A to the winding shaft 23A is momentarily interrupted, and the winding shaft 23A is rotationally driven while changing the speed relatively to the transmission shaft 36A. You. Therefore, contact roll 2
The rotation of No. 4 is always performed at a constant speed, whereas the winding roll 23 can be rotated so that the angular speed is reduced by the action of a load. With this configuration, even if the winding diameter gradually increases as the winding of the sanding belt 22 by the winding roll 23 progresses, the winding speed of the sanding belt 22 by the winding roll 23 is increased. Can be maintained at the same speed as the feeding speed of the sanding belt 22 by the contact roll 24.

The operation of the driving mechanism 30 is controlled based on the detection signals from the sensors 15A and 15B described above. When a predetermined time elapses based on the time when the detection signal is output to the control circuit, the sanding belt is operated. 22
Is started and stopped.

The tension mechanism 40 includes a tension roll 41 and a pressing roll 42, as shown in FIG. The tension roll 41 includes a bracket 43
Fixed shaft 4 that is not rotatable at a certain position
4 is fitted so as to be relatively rotatable through a torque limiter (not shown) having a structure similar to that of the torque limiter 60 described above. Therefore, when the tension roll 41 receives a pulling force toward the contact roll 24 via the sanding belt 22, the tension roll 41 only rotates by generating a slip with the fixed shaft 44, and receives the pulling force. It does not rotate while it is not.

The pressing roll 42 is rotatably supported at one end of an arm 46 supported by a support shaft 45 fixed to a frame (not shown). A piston rod 48A of an air cylinder 48 rotatably supported by a support rod 47A erected on a frame 47 is connected to the other end of the arm 46 so as to be relatively rotatable. The pressing roll holds the tension roll 4 while sandwiching the sanding belt 22 by the pressure of the working air in the air cylinder 48.
Pressed to 1.

As described above, the sanding belt 22
By being sandwiched between the tension roll 41 and the pressing roll and receiving the braking force of the torque limiter, loosening between the tension mechanism 40 and the take-up roll 23 is prevented, so that the tension state is always maintained. it can.

As shown in FIG. 2, the braking mechanism 50 includes a braking roll 51, an air cylinder 52, and an arm 53. The arm 53 is rotatably supported by a support shaft 54 at a predetermined position of a frame (not shown). The air cylinder 52 is rotatably supported by a bracket 55 of a frame (not shown), and its piston rod 52A is connected to one end of the arm 53 so as to be relatively rotatable. A fixed shaft 56 is attached to the other end of the arm 53, and the brake roller 51 is rotatably supported on the fixed shaft 56 via a non-reversible clutch (not shown).

The brake roll 51 is pressed by the contact roll 24 while sandwiching the sanding belt 22 by the pressure of the working air in the air cylinder 52. The position where the braking roll 51 is pressed against the contact roll 24 is a position slightly shifted to the winding roll 23 side from the position where the contact roll 24 contacts the sanding belt 22 to the work.

The irreversible clutch of the braking roll 51 has a structure such as a ratchet mechanism in which two coaxial rotary members are engaged so as to be able to rotate only in one direction. Therefore, although the braking roll 51 freely rotates in the same direction as the traveling direction of the sanding belt 22 with respect to the fixed shaft 56, the rotation in the opposite direction is prevented by the non-reversible clutch.

While the contact roll 24 rotates only at a fixed position, the receiving roll 25 located immediately below the contact roll 24 can be moved up and down by an elevating mechanism 70 shown in FIG. The lifting mechanism 70 will be described.
Gear box 71 fixed to a frame not shown in FIG.
A male screw rod 72 whose axis is oriented vertically is freely supported only in rotation, and a worm 74 is meshed with a worm wheel 73 formed on the male screw rod 72.
Sprocket 74A integrally attached to worm 74
(See FIG. 2) and a sprocket 75A integrally attached to the handle 75, a chain 76 is hung. Is rotated.

An upper end portion of the male screw rod 72 protruding from the gear box 71 is provided with a female screw hole 77A of an elevating body 77 having only an upper and lower part freely provided by a frame guide (not shown).
The lifting member 77 is moved up and down by the rotation of the male screw rod 72 to be adjusted to a predetermined height. In the state where the rotation of the male screw rod 72 is stopped, the transmission of the rotational force from the worm wheel 73 to the worm 74 is prevented, so that the elevating body 77 is maintained at a constant height.

An air cylinder 78 having a piston rod 78A protruding upward is fixed to the elevating body 77.
The basic height of the air cylinder 78 is adjusted by changing the height of the elevating body 77 by operating the handle 75 described above. Above the air cylinder 78, an arm 79B is attached to a bracket 79A erected on a frame 79.
Are supported in a cantilevered state so as to freely swing in the vertical direction.
The receiving roll 25 is rotatably supported by the arm 79B, and an air cylinder 78 is attached to the free end of the arm 79B.
Are connected.

The supply and discharge of the working air to and from the air cylinder 78 are controlled based on the detection signals from the sensors 15A and 15B, and a predetermined time is set based on the time when the detection signal is output to the control circuit. When the time has elapsed, supply and discharge of the working air are performed.

When the air cylinder 78 is actuated and its piston rod 78A advances and retreats, the receiving roll 25 swings up and down together with the arm 79B, and the receiving roll 25 pushes up the work and comes into contact with the sanding belt 22 from the rising position and the work. It is configured to be displaced between a separated descending position.

The height of the lowermost surface of the portion of the sanding belt 22 that is in contact with the contact roll 24 is set so that the upper surface of the work is separated from the sanding belt 22 when the work receiving roll 25 is at the lowered position. Have been. Therefore, in a state where the receiving roll 25 is displaced to the lowered position, the work can pass through the polishing mechanism 20 without being polished. Further, the receiving roll 25 pushes up the work and the sanding belt 2
In the state where the workpiece 2 is in contact with the workpiece 2, the workpiece is slightly upwardly curved so as not to affect the conveyance.

The take-up roll 23 can be easily replaced by a mechanism shown in FIG. One end of the take-up shaft 23A of the take-up roll 23 is held by a swing bracket 83 that is swingably supported by a support shaft 82 on a frame 81. A bearing 8 is provided in the mounting hole 84 at the swing end of the swing bracket 83.
5, a rotary cylinder 86 is fitted.
The taper surface 86A of the winding shaft 23A is
It is structured to be pressed. Thereby, the bolt 8
By removing 7, the winding shaft 23A is released from the pressing of the swing bracket 83. From this state, the take-up roll 23 can be removed by extracting it in the axial direction. When the bolt 87 is removed, the swing bracket 83 comes into contact with the stopper 88 to be in a state shown by a chain line in FIG. When mounting the winding roll 23, the end of the winding shaft 23A may be held in the reverse procedure.

The polishing mechanism 20 is provided with a cleaning oil supply port 91A for supplying cleaning oil to the work. The cleaning oil supply port 91A is provided at a position slightly to the left of the contact roll 24 in FIG.
Therefore, when the work is first conveyed to the polishing mechanism 20, the cleaning oil is supplied to the work immediately before contacting the sanding belt 22. The cleaning oil supply port 91B is also provided at a position on the right side of the polishing mechanism 20 in FIG. The cleaning oil supply port 91B is
The cleaning oil is supplied to the work polished by the cleaning oil, and when the work is conveyed in the opposite direction to the arrow W in FIG. Can be supplied.

In FIG. 1, an arrow W is shown with respect to the polishing mechanism 20.
The oil draining device 100 is positioned at a predetermined interval in the direction.
Is provided. As shown in FIG. 9, the oil draining device 100 has three pairs of pads 101A and 101B that form a pair at the top and bottom with the work transfer surface interposed therebetween. Each pad 101A,
101B is attached to horizontal elongated supports 102A and 102B orthogonal to the work conveyance direction, and a sponge-shaped pressing body 104 and a cloth made of a fibrous material such as felt are provided in the concave portions 103 of the supports 102A and 102B. And an oil-absorbing member 105 in the shape of a circle. Oil absorbing member 105
Is mounted in a state where it covers the pressing body 104 and is folded on both sides thereof, and is fixed by fixing plates 106 and screws 107 on the side surfaces of the supports 102A and 102B. The surface of the oil absorbing member 105 that comes into contact with the pressing body 104 comes into contact with the work over a certain range in the transport direction, whereby the cleaning oil adhering to the surface of the work is absorbed.

The upper pad 101A of each pair of pads 101A and 101B is provided so as to be able to move up and down by an elevating mechanism 110 described later, and the lower pad 101B is fixed to the frame 108. Upper pad 10
1A, the height of the upper surface of the lower pad 101B is adjusted by a pair of feed rolls 12A and 12B located on both sides of the oil draining device 100 and an oil draining roll 12 described later.
The height is set so as not to contact the lower surface of the work conveyed by being sandwiched between 0A and 120B.

That is, when the upper pad 101A is lowered, the work is pushed down so as to bend slightly downward so as not to hinder the transfer, and comes into contact with the lower pad 101B. 101
The oil is drained while being sandwiched between B and B. Further, when the upper pad 101A does not come into contact with the work because the upper pad 101A rises, the work does not come into contact with the lower pad 101B, so that the work can be carried out in the direction of arrow W in FIG. 1 without performing oil drainage. It is possible.

Next, the lifting / lowering mechanism 1 for the upper pad 101A
10 will be described with reference to FIG. At two positions corresponding to both ends of the pad on the lower surface of the frame (not shown), a worm 112 and a worm wheel 113 meshing with each other are provided.
And a bracket 111 rotatably supporting are fixed. The axis of the worm 112 is parallel to the length direction of the pad 101A, and the axis of the worm wheel 113 is oriented in the up-down direction. A male screw rod 114 protruding below the bracket 111 is attached to the worm wheel 113 so as to be integrally rotatable. The lower end of the male screw rod 114 is screwed into a female screw hole 115A formed at the end of the elongated support 115 along the length direction of the pad 101A. When a handle (not shown) attached to a drive shaft 112A extending from the worm 112 is operated, the worm 11
2 and male threaded rod 1 through the engagement of worm wheel 113
As the 14 rotates, the support body 115 can move up and down to adjust its height.

The air cylinder 1 is provided at both ends of the support body 115.
A downwardly projecting piston rod 116A is connected to the lifting / lowering body 117.
The elevating body 117 is elongated in parallel with the pad 101A, and up and down guide pins 118 attached to both ends thereof are fitted in guide holes 115B of the support body 115 so as to be able to move up and down freely. Further, the elevating body 117 has the support 102A.
Is attached. Elevator 117 and support 102A
Means that at one end shown in FIG.
8, the height of the pad 101A attached to the support 102A can be adjusted.

In the elevating mechanism 110, the supply and discharge of the working air to the air cylinder 116 for each pad 101A are individually controlled based on the detection signal from the sensor 15B, and when the detection signal is output to the control circuit. The supply and discharge of the working air are performed when a predetermined set time has elapsed with reference to.

When the air cylinder 116 operates and its piston rod 116A moves forward and backward, the elevating body 117, the support 1
02A and the pad 101A are displaced up and down,
1A is displaced between a descending position in which the workpiece is brought into contact with the workpiece and pressed down, and a raised position in which the workpiece is separated from the workpiece. At a position closer to the polishing mechanism 20 than the oil draining device 100, a pair of upper and lower oil draining rolls 120A, 120A for removing the cleaning oil adhering to the surface of the work is provided.
20B are provided. Each support shaft 120A, 120B
Are rotatably supported by support shafts 124A and 124B, respectively. As shown in FIG. 8, the lower oil skimmer 120B is normally kept at a constant height with respect to the frame 121. However, if necessary, the bearing body 123 can be raised and lowered by adjusting the bolt 122. Thereby, the height can be adjusted. On the other hand, the upper oil draining roll 1
20A can be moved up and down. The support shaft 124A of the upper oil draining roll 120A is connected to a piston rod 125A of an air cylinder 125 fixed to the frame 121, and is driven to move up and down based on a detection signal from the sensor 15B.

Further, a pair of upper and lower oil draining rolls 130A and 130B having the same configuration as above is provided at the most extreme end position (left end in FIG. 1) of the transport path of the contact roll 24. The oil draining rolls 130A and 130B are also arranged on the upper oil draining roll 1 based on a detection signal from the sensor 15A.
30A goes up and down. Further, a pair of upper and lower cleaning brushes 140A, 14 is provided between the polishing mechanism 20 and the oil draining device 100.
0B is provided. This cleaning brush 140A, 14
OB is rotated by a driving mechanism (not shown) to rub the surface of the work.
Foreign substances on the surface of the work are wiped and removed by 40A and 140B.

Next, the operation of this embodiment will be described. When the workpiece is transported, the traveling of the sanding belt 22 of the polishing mechanism 20 is stopped, the receiving roll 25 is at the lowered position, the upper oil skimmer 130A is raised, and the upper pad 101A of the oil skimmer 100 is raised. In position.

In this state, when the work is conveyed from the starting end side (left side in FIG. 1) of the conveyor 10 in the direction of the arrow W in FIG.
Start end sensor 15A that detects the position of the front edge of the work
The receiving roll 25 rises and the running of the sanding belt 22 starts almost at the same time when the front edge of the work reaches directly below the contact roll 24, based on the detection signal from. Along with this, the cleaning oil is supplied from the cleaning oil supply port 91A toward the work. Thereby, the surface of the work is polished by the sanding belt 22 and a hairline process is performed. Sanding belt 2 at this time
Since the traveling speed of the workpiece 2 is lower than the transport speed of the workpiece, the relative polishing direction of the sanding belt 22 to the workpiece is opposite to the arrow W. At this time, since the sanding belt 22 is kept in tension between the tension roll 41 and the take-up roll 23 by the tension mechanism 40, the running of the sanding belt 22 is stabilized,
The sanding belt 22 always performs uniform polishing on the work.

Thereafter, based on the detection signal from the sensor 15A which has detected the position of the trailing edge of the work, the traveling of the sanding belt 22 is stopped at the same time when the trailing edge of the work finishes passing through the contact roll 24 and is received. Roll 25 descends. Then, when the trailing edge of the work passes just below the sensor 15B on the end side, it is detected that the work has been conveyed by the conveyor 10 based on the detection signal from the sensor 15A.

Thereafter, the conveyor 10 resumes driving in the direction opposite to the above, and the work is transported in the direction opposite to the direction of the arrow W in FIG. At this time, the cleaning oil supply port 91B on the terminal side
The supply of the cleaning oil to the work is performed. And
Based on the detection signal from the sensor 15B on the end side that has detected the front edge (the left edge in FIG. 1) in the transport direction of the work, at the same time as the front edge of the work reaches directly below the contact roll 24, the receiving roll 25 Rises, and the running of the sanding belt 22 resumes, whereby the hairline processing on the work is performed again. At this time, the polishing direction of the sanding belt 22 relative to the workpiece is the same as the arrow W.

At this time, the sanding belt 22
Receives frictional resistance in the direction opposite to the traveling direction due to contact with the workpiece, but the braking mechanism 50 prevents the sanding belt 22 from traveling in the opposite direction. Therefore, the sanding belt 22 is
The tension is always maintained without causing any slack between the workpiece and the tension roll 41, and the workpiece is polished satisfactorily.

As described above, while the work is traveling back and forth, the work is polished so that the polishing directions are opposite to each other on the outward path and the return path, whereby the hairline processing is performed twice. When the trailing edge (the right edge in FIG. 1) of the workpiece in the transport direction has passed through the contact roll 24, the receiving roll 25 is lowered and the sanding belt 22 stops running. Further, when the trailing edge of the workpiece passes the sensor 15A, the sensor 1
The conveyance of the work by the conveyor 10 is stopped based on the detection signal from 5A.

Thereafter, the arrow W is again moved by the conveyor 10.
The transfer of the workpiece in the direction starts. At this time, if a hairline process is performed on the work, the supply of the cleaning oil, the lifting of the receiving roll 25, and the running of the sanding belt 22 are performed. When the hairline processing is not performed, the work passes through the polishing mechanism 20 without contacting the sanding belt 22 and the receiving roll 25 without supplying the cleaning oil. Then, the foreign matter on the surface of the work is removed when passing through the cleaning brushes 140A, 140B, and the cleaning oil on the surface of the work is removed while passing through the oil draining rolls 120A, 120B on the terminal side.

Thereafter, the work enters the oil draining device 100, and based on the detection signals from the sensor 15B on the end side which has detected the front edge (the right edge in FIG. 1) in the direction of transport of the work, the three signals are detected. The pad 101A descends sequentially, and at the same time as the front edge of the work reaches directly below each pad 101A, the work is sandwiched between the lower pad 101B. Then, while passing between the pads 101A and 101B, the cleaning oil on the surface of the work is absorbed and removed while being wiped. At this time, pad 10
1A is lowered after the front edge of the work reaches directly below the pad 101A, and the pad 101A is not lowered while the front edge of the work is located before the pad 101A. Therefore, even if the work is warped and its front edge is directed obliquely upward, there is no possibility that the work front edge hits the side surface of the pad 101A. After the oil draining is performed in this manner, the work is carried out from the end of the conveyor 10, and the hairline processing on the work is completed as described above.

As described above, in this embodiment, the conveyor 10
15A, 1 that detect the position of the work conveyed by
Based on the detection signal from 5B, the running of the sanding belt 22 can be started when the work reaches the predetermined polishing position, and the running of the sanding belt 22 can be stopped when the work leaves the polishing position. Therefore, it is possible to prevent the sanding belt 22 from being locally worn due to the work being conveyed while being in contact with the sanding belt 22 while the sanding belt 22 is stopped. In addition, it is possible to prevent the use of the sanding belt 22 from running while the work is not present at the polishing position, so that the sanding belt 22 has a useless portion that is not used for polishing.

Further, since the sensors 15A and 15B are provided at two places on both sides of the polishing mechanism 20 in the direction of transporting the work, even when the work is transported in the reciprocating direction and the polishing mechanism 20 is polished twice. In addition, the traveling of the sanding belt 22 is controlled in accordance with the transfer position of the work, so that it is possible to prevent the sanding belt 22 from having a locally worn area or a wasteful unused area.

Further, since the sanding belt 22 is not an endless belt, but is of a type that is unreeled from the unwinding roll 21 and wound up by the take-up roll 23, the total length of the sanding belt 22 is Is longer than an endless sanding belt. Accordingly, the use period of one sanding belt 22 is lengthened, and the frequency of replacement is low.

Further, a rotational driving force by the driving mechanism 30 acts on the contact roll 24, and the rotational driving force acts as a traveling driving force on the sanding belt 22.
When polishing while transporting in the direction opposite to the direction 2, the sanding belt 22 can run stably.

The method of transporting the work and the method of polishing the work on the outward and return paths described in the above embodiment are examples of the operation of the hairline processing machine of the present embodiment. In the hairline processing machine described above, any hairline processing can be performed according to programs other than the above. Specifically, (a) polishing is performed on the outward path of the work (the direction of the arrow W in FIG. 1), and is not performed on the return path.
Polishing is performed again in the second forward pass. (B) No polishing is performed in the first forward pass of the work, first polishing is performed in the return pass, and second polishing is performed in the second forward pass. 1 is transported only once in the direction of the arrow W to perform polishing only once.
(D) Various kinds of processing methods are possible, such as making the work reciprocate two or more times and performing arbitrary polishing on the outward and return paths between them.

<Other Embodiments> The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention.

[0056]

(2) In the above embodiment, the case where the torque limiter 60 is provided on the tension roll 41 as the tension mechanism 40 in the polishing mechanism 20 has been described.
The tension mechanism may be configured by providing a torque limiter to the feeding roll.

(3) In the above embodiment, the case where the braking roll 51 is pressed against the contact roll 24 as the braking mechanism 50 in the polishing mechanism 20 has been described. However, the present invention relates to a pair of irreversible clutches. The braking mechanism can be configured by providing the braking roll without pressing the contact roll. (4) In the above embodiment, the rotation of the contact roll 24 and the winding of the winding roll 23 are driven by the single driving mechanism 30. Although the case where both the driving and the driving are performed has been described, in the present invention, the rotation driving of the contact roll and the winding driving of the winding roll may be performed by mutually different driving mechanisms.

(5) In the above embodiment, the case where the contact roll 24 is driven to rotate has been described. However, the present invention may be such that the contact roll 24 can be freely rotated without applying a rotational driving force.

(6) In the above embodiment, the sensors 15A, 1
Although the case where a photoelectric sensor is used as 5B has been described, the present invention may be a sensor using other detection means such as magnetism or ultrasonic waves other than the photoelectric switch.

(7) In the above embodiment, the sensors 15A, 1
5B is provided at two positions on both sides of the polishing mechanism 20 in the work transfer direction to reciprocate the work. However, the present invention provides a sensor at only one position on the front side of the polishing mechanism in the work transfer direction. And the work may be polished by sailing in only one direction.

(8) In the above embodiment, the traveling speed of the sanding belt 22 is set to be lower than the transport speed of the work. However, the present invention is not limited to this. In the case where the hairline processing is performed in only one direction without performing, the traveling speed of the sanding belt 22 may be set to be higher than the transport speed of the work.

[Brief description of the drawings]

FIG. 1 is an overall front view of an embodiment of the present invention.

FIG. 2 is a partially enlarged front view of a polishing mechanism.

FIG. 3 is a partially cutaway enlarged front view showing a lifting mechanism of a receiving roll.

FIG. 4 is an enlarged front view showing a drive mechanism of a contact roll and a take-up roll.

FIG. 5 is an enlarged plan view showing a drive mechanism of a contact roll and a take-up roll.

FIG. 6 is a partially cutaway enlarged plan view showing the structure of a torque limiter.

FIG. 7 is a partially cut-away enlarged side view showing a bearing structure of a take-up roll.

FIG. 8 is a cross-sectional view showing a bearing structure of an oil draining roll.

FIG. 9 is an enlarged front view of a pad of the oil draining device.

FIG. 10 is a cross-sectional view showing a pad lifting / lowering mechanism of the oil draining device.

[Explanation of symbols]

 10 Conveyor 15A, 15B Sensor 20 Polishing mechanism 22 Sanding belt

Claims (2)

(57) [Claims] A conveyer for conveying a work in the form of a thin metal plate.
Take up on the take-up roll while being fed out from the bear and the pay-out roll
Sanding bell that runs in one direction
A polishing mechanism for bringing a workpiece into contact with the work and performing a hairline process on the work;
The workpiece to be contacted with the belt,
Displaceable from the position separated from the
And a sensor for detecting the position of the work on the conveyance path, and based on a detection signal from the sensor, control of running and stopping of the sanding belt and displacement of the receiving roll based on a detection signal of the sensor. > A hairline processing machine characterized by a configuration to be controlled. 2. The hairline processing machine according to claim 1, wherein the sensors are provided at two positions on both sides of a polishing position of the sanding belt on a conveyance path.