JP2948104B2 - 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 In general, hairline processing is performed by bringing a sanding belt of a polishing mechanism into contact with a work and moving the sanding belt relative to the work to form minute rub marks on the surface of the work. In this case, the sanding belt may be preferably moved in the forward and reverse directions with respect to the work, or may be repeatedly moved in the same direction.Therefore, conventionally, along the conveyance path of the conveyor for conveying the work, A configuration provided with a plurality of polishing mechanisms has been provided.

[0003] There is also provided a type of sanding belt which uses an endless annular belt. However, in this case, the sanding belt is worn out at an early stage and must be replaced frequently. It has been considered that the belt is wound around a pay-out roll, and is run while being wound up on a take-up roll.

[0004]

However, in the case of a hairline processing machine provided with a plurality of polishing mechanisms, not only the structure of the apparatus is complicated, but also the transport path is lengthened and the installation space for the machine is considerably increased. was there.

In a configuration in which a sanding belt wound around a pay-out roll is run while being wound up on a take-up roll, as the winding on the take-up roll progresses, the diameter of the wound sanding belt gradually increases. Therefore, the running speed of the sanding belt increases with an increase in the peripheral speed, and eventually, the relative speed of the contact portion with respect to the workpiece gradually increases, and it is difficult to perform uniform hairline processing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to efficiently perform a hairline process of performing polishing while relatively moving a sanding belt with respect to a work by using a device having a simple structure. It is to do well. Another object is to enable uniform hairline processing while keeping a relative speed with respect to a work constant while allowing a long sanding belt to travel in a winding manner.

[0007]

According to a first aspect of the present invention, there is provided a conveyor capable of transporting a work in a reciprocating direction, and the work is wound on a winding roll while being unreeled from a unwinding roll. A sanding belt that travels in one direction is brought into contact with the work, and a polishing mechanism that can perform hairline processing on the work in both forward and backward transport processes, and a polishing mechanism on the running path of the sanding belt. A braking roll that is in contact with the sanding belt so as to be rotatable at a position closer to the winding roll than a polishing position on the work, and the braking roll is directed toward the winding roll of the sanding belt; A braking mechanism that is allowed to rotate in the same direction as the traveling direction and is disabled from rotating in the opposite direction. By friction between the sanding belt and Lumpur, having characterized in that the sanding belt is configured to restrict the reverse traveling toward the unwinding roll side.

[0008] The invention of claim 2 is characterized in that, in the invention of claim 1, the traveling speed of the sanding belt is set to be lower than the conveying speed of the work by the conveyor. According to a third aspect of the present invention, in the first or second aspect of the present invention, the sanding belt is pressed against the work by a contact roll rotating in a polishing section, and a driving source for rotating the winding roll is provided. Is transmitted to the winding roll via the sliding friction clutch.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the take-up roll is wound with respect to the sanding belt on a side closer to the pay-out roll than a polishing section on a traveling path of the sanding belt. It is characterized in that a tension mechanism for applying a braking force against the force is provided.

[0010]

[0011]

According to the first aspect of the present invention, when the work is conveyed in a predetermined direction by the conveyor, the surface of the sanding belt of the polishing mechanism is subjected to hairline processing while contacting the work.
Thereafter, when the transport direction of the work is reversed, the work is again subjected to hairline processing by the same polishing mechanism. When the work is transported in the reverse direction, a reverse running force acts on the sanding belt due to frictional resistance with the work.
In the present invention, since the braking mechanism for applying the braking force is provided, the reverse running is prevented.

In the invention of claim 2, it is assumed that the workpiece is conveyed by the conveyor in the same direction as the sanding belt. In the present invention, since the speed of the sanding belt is set lower than the conveying speed of the work, the work relatively moves with respect to the sanding belt in a direction overtaking the sanding belt. Then, when the work is conveyed by the conveyor in the direction opposite to the sanding belt, the work relatively moves in the direction opposite to the above with respect to the sanding belt, and after all, the work is polished in both directions by the sanding belt. Will be able to do it. According to the third aspect of the present invention, since the sanding belt is wound up by the winding roll while being fed from the feeding roll, a long sanding belt can be used. In this type of winding type configuration, as the winding of the winding roll advances and the diameter of the wound sanding belt increases, the running speed of the sanding belt tends to increase as the peripheral speed increases. However, in the present invention, the difference between the winding speed and the traveling speed is absorbed by the slip in the sliding friction clutch.

According to the fourth aspect of the present invention, the sanding belt is kept in tension between the take-up roll and the winding roll by the tension mechanism, and the sanding belt does not loosen between the contact roll and the work.

[0014]

According to the first aspect of the present invention, the hairline processing can be repeatedly performed on the work by one polishing mechanism, so that the structure is simplified and the transport path is shortened to save space. And work efficiency is improved. Furthermore, since the work is reciprocated and has a braking mechanism, the running stability of the sanding belt can be ensured even when the work is conveyed in the reverse direction with respect to the sanding belt. Good reciprocating hairline processing can be performed on a work while having excellent advantages.

According to the second aspect of the present invention, the hairline processing in the reciprocating direction can be performed with a simpler structure. According to the third aspect of the present invention, since a long sanding belt can be used, the frequency of replacement of the sanding belt can be reduced, and the working efficiency can be increased. Since the difference in the speeds is absorbed, the effect that the workpiece can be uniformly polished is obtained. According to the fourth aspect of the invention, in addition to the effects of the first and second aspects of the present invention, since the loosening of the sanding belt between the contact roll and the work is prevented, good polishing of the work is ensured. Can be done.

[0016]

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 feed rolls 12A and 12B, which form a pair up and down, 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 adapted to rotate interlockingly by the engagement of gears (not shown), and the lower five feed rolls 12B of each pair are rotatable interlockably by a chain and sprocket (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. Transported at a 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.
The direction and timing of the conveyance of the conveyor 10 are controlled based on the rotation speed of the feed rolls 12A and 12B based on the output of the detection signals from the sensors 15A and 15B described later.

The sensors 15A and 15B are provided on both sides of the polishing mechanism 20 at an intermediate position between two pairs of feed rolls 12A and 12B. These sensors 15A and 15B
This is called a photoelectric switch that irradiates light toward a passage area of a work, detects reflected light from the work, and converts the light into an electric signal, and a light receiving unit thereof is opposed to an upper surface of the work. The sensors 15A and 15B detect the position of the front edge and the position of the rear edge of the workpiece on the conveyor 10, and output the detection signals 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 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 drive mechanism 30 includes a motor 31 for generating a rotational drive force in only one direction, and a reduction gear train (not shown) connected to the motor 31 via 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 sliding friction clutch 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 3
One rotation driving force is transmitted to the take-up roll 23. The sanding belt 22 is fed out from the feeding roll 21 and wound up by the winding roll 23 by the rotation driving force transmitted to the contact roll 24 and the winding force transmitted to the winding roll 23 in FIG. The vehicle travels in one direction indicated by an arrow B in FIG. The running direction of the sanding belt 22 is the
The direction 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 work can be wound around and contacted with the work. The traveling speed of the 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 has a structure shown in FIG. Transmission shaft 3 of transmission sprocket 36
A driven body 61 is provided with a flange 62, a thin ring-shaped clutch plate 63, and a transmission gear 38 fixed to a mounting flange 65 on the outer periphery 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 sliding friction clutch 60, when the value of the transmission torque due to the load acting on the take-up 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. A constant torque is transmitted as the rotational driving force from the transmission shaft 36A to the winding shaft 23A, and the winding shaft 23A is rotationally driven while changing the speed relatively to the transmission shaft 36A. 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 feed 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. When a predetermined time elapses with reference to the time when the detection signals are 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 sliding friction clutch (not shown) having the same structure as the above-mentioned sliding friction clutch 60. Therefore, when the tension roll 41 receives a tensile force toward the contact roll 24 via the sanding belt 22, the fixed shaft 4
It only rotates by causing a slip between itself and 4 and does not rotate while it is not subjected to a pulling force.

The pressing roll 42 is rotatably supported by 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.

Thus, the sanding belt 22
By being sandwiched between the tension roll 41 and the pressing roll and receiving the braking force of the sliding friction clutch,
The loosening between the tension mechanism 40 and the take-up roll 23 is prevented, and the tension state is always maintained.

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 braking 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 brake 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
A chain 76 is hung between a sprocket 75A integrally attached to the handle 75 (see FIG. 2) and the sprocket 75A. When the handle 75 is rotated, the male screw rod 72 is engaged with the worm 74 and the worm wheel 73. Is rotated.

The 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 described above, 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 raised position and the work. It is displaced between the 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 winding 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 workpiece over a certain range in the transport direction, so that the cleaning oil adhering to the surface of the workpiece is absorbed. It has become.

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 conveyance, 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 the 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 and 120B for removing the cleaning oil adhering to the surface of the work are provided. The support shafts 120A and 120B are rotatably supported by the support shafts 124A and 124B, respectively. As shown in FIG. 8, the lower oil skimmer 1
20B is normally kept at a fixed height relative to the frame 121, but the height can be adjusted by raising and lowering the bearing body 123 by adjusting the bolt 122 as necessary. ing. On the other hand, the upper oil draining roll 120A can be moved up and down. The support shaft 124A of the upper oil skimmer 120A is
Piston rod 12 of air cylinder 125 fixed to 1
5A, and is driven up and down based on a detection signal from the sensor 15B.

Further, a pair of upper and lower oil draining rolls 130A, 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, the polishing mechanism 20 and the oil removing device 100
A pair of upper and lower cleaning brushes 140A and 140B are provided between the cleaning brushes 140A and 140B. These cleaning brushes 140A, 140B
Is rotated by a driving mechanism (not shown) to rub the surface of the work.
A, 140B wipes and removes foreign matter on the surface of the work.

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 (the 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 conveyed 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.

In this way, 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 conveyer 10 again moves the arrow W
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 three works are performed 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 work conveyance direction. 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, the work is conveyed back and forth and is polished by the polishing mechanism 20 in each of the forward path and the return path. In this embodiment, however, the work is reciprocated between one polishing mechanism 20 and the work. Since the conveyor 10 is used to convey, the structure of the entire hairline processing machine is simplified, and the conveying path of the work is shortened to save space. Further, the work efficiency is higher than in the case where the direction is reversed and the work is conveyed only in one direction without being reciprocated. Further, even when the workpiece is conveyed in the reverse direction with respect to the sanding belt 22 by the braking mechanism 50 provided in the polishing mechanism 20,
Running stability is ensured.

As the sanding belt 22,
The endless sanding belt has a longer overall length than the endless sanding belt because the endless sanding belt is used instead of the endless sanding belt. ing.
Therefore, 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.

Further, since the application of the rotational driving force to the contact roll 24 and the application of the winding force to the winding roll 23 are performed by the single driving mechanism 30,
The structure is simplified and the cost is reduced.

Since the rotational force of the drive mechanism 30 is transmitted to the take-up roll 23 via the sliding friction clutch 60, the take-up of the take-up roll 23 progresses and the take-up diameter increases. Even if the winding speed is relatively higher than the running speed of the sanding belt 22, the transmission of the rotational driving force from the driving mechanism 30 to the winding roll 23 is interrupted by the operation of the sliding friction clutch 60. Thereby, the difference between the winding speed and the traveling speed is absorbed.
Therefore, the sanding belt 22 can always run at a constant speed while maintaining the tension state.

The method of transporting the work and the method of polishing the work in the forward and backward 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.

[0064]

(2) In the above embodiment, the case where the sliding friction clutch 60 is provided on the tension roll 41 as the tension mechanism 40 in the polishing mechanism 20 has been described. A tension mechanism may be configured.

(3) In the above embodiment, the case where the brake roll 51 is pressed against the contact roll 24 as the brake mechanism 50 in the polishing mechanism 20 has been described. However, the present invention relates to a pair of irreversible clutches. The braking mechanism may be configured by providing the braking roll without pressing the contact roll.

(4) In the above embodiment, the single driving mechanism 3
0, both the rotational driving of the contact roll 24 and the driving of the winding roll 23 are performed. However, in the present invention, the rotational driving of the contact roll and the winding driving of the winding roll are separated from each other. May be performed by the driving mechanism described above.

(5) In the above embodiment, the case where the contact roll 24 is rotationally driven has been described. However, the present invention may be configured such that the contact roll 24 is 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 use a sensor using other detection means, such as magnetism or ultrasonic waves, other than the photoelectric sensor.

(7) In the above embodiment, the traveling speed of the sanding belt 22 is set to be lower than the conveying 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 sliding friction clutch.

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]

 DESCRIPTION OF SYMBOLS 10 ... Conveyor 20 ... Polishing mechanism 21 ... Feeding roll 22 ... Sanding belt 23 ... Winding roll 24 ... Contact roll 40 ... Tension mechanism

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B24B 21/20 B24B 21/00 B24B 21/14

Claims (4)

(57) [Claims] 1. A conveyor capable of transporting a work in a reciprocating direction, and winding on a winding roll while being fed from a feeding roll.
The sanding belt running in one direction is brought into contact with the work by
A polishing mechanism capable of performing hairline processing in both conveyance processes on the return path; and a polishing mechanism on a position closer to the take-up roll than a polishing position of the work on the traveling path of the sanding belt.
Brake that is slidably contacted with the sanding belt
Roll, and the braking roll is
In the same direction as the running direction of the
Rotation is allowed and rotation in the opposite direction is disabled.
And a braking mechanism which, friction between the sanding belt and the braking roller
The sanding belt is
A hairline processing machine characterized in that it is configured to restrict running in the reverse direction . 2. The hairline processing machine according to claim 1, wherein said sanding belt runs in one direction at a speed lower than a conveying speed of said workpiece by said conveyor. Wherein the sanding belt is pressed against the workpiece by contact rolls rotate have you <br/> the polishing unit, sliding friction rotational driving force from the driving source for rotationally driving the take-up roll The hairline processing machine according to claim 1 or 2, wherein the hairline is transmitted to the winding roll via a clutch. To wherein said feed roll side than the contact roller on the travel path of the sanding belt, provided with a tensioning mechanism for applying braking force against the winding force of the winding roll to said sanding belt The hairline processing machine according to claim 3, wherein