JPH0839412A - Hair line finishing machine - Google Patents

Abstract

PURPOSE:To prevent causing of wasteful portions such as a locally frictional portion and useless portion on a sanding belt. CONSTITUTION:A sanding belt 22 starts to move when a tip edge gets to just under a contact roller 24 based on a detected signal from a sensor 15A sensed the tip edge of the work and the sanding belt 22 stops moving when a rear edge of the work passes the contact roller 24. The work is not polished when the sanding belt 22 stops and the sanding belt 22 will not move when the work is not presented at its polishing position.

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 hairline processing on a work conveyed by a conveyor.

[0002]

2. Description of the Related Art A hairline processing machine for subjecting a work to a hairline is provided with a conveyer for conveying the work and the work conveyed by the conveyer by bringing the sanding belt into contact with the work. It has a configuration including a polishing mechanism for performing hairline processing.

[0003]

In the conventional hairline processing machine, the conveyance of the conveyor and the traveling of the sanding belt of the polishing mechanism are individually controlled. Therefore, the situation where the traveling of the sanding belt is stopped even though the work is conveyed by the conveyor, or the sanding belt is traveling even when the work is not conveyed may occur. was there. In the former case, abrasion of the sanding belt locally progresses, and only the worn 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 the portion is wasted.

The present invention was devised in view of the above circumstances, and an object of the present invention is to prevent the sanding belt from being locally worn or a wasteful portion of the sanding belt that is not used for polishing. Is.

[0005]

As a means for solving the above-mentioned problems, the invention of claim 1 is a polishing for applying a hairline process by bringing a sanding belt into contact with a work conveyed by a conveyor while the work is conveyed. It is characterized in that it is provided with a mechanism and a sensor for detecting the position of the work on the conveyance path, and controls the running and stopping of the sanding belt based on the detection signal of the sensor.

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

[0007]

According to the invention of claim 1, the position of the workpiece conveyed by the conveyor is detected by the sensor, and based on the detection signal, the sanding belt starts traveling when the workpiece reaches a predetermined polishing position. When the work leaves the polishing position, the sanding belt stops running.

According to the second aspect of the invention, when the work is conveyed in one direction by the conveyor for polishing, the position of the work is detected by one sensor, and the work is conveyed in the opposite direction for polishing. The position of the work is detected by the other sensor.

[0009]

According to the first aspect of the present invention, the sanding belt can be run only when the work is in the polishing position, so that the sanding belt is locally worn and the work is not polished. There is an effect that it can be prevented from becoming uniform, and that a running part which is not used for polishing is not generated in the sanding belt and running cost can be reduced.

According to the second aspect of the invention, in addition to the above effects, the position of the work can be detected to control the running state of the sanding belt when the work is conveyed in either forward or reverse directions. Even when a work is reciprocally transported and polished, uniform polishing and reduction of running cost can be realized.

[0011]

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

The conveyor 10 is constructed by providing five pairs of feed rolls 12A and 12B, which are paired vertically, between a pair of frames 11 in a predetermined arrangement in the horizontal direction. Two pairs of these feed rolls 12A and 12B are arranged on both sides sandwiching a polishing position by a polishing mechanism 20 described later in the transport direction of the conveyor 10, and sandwiched between an oil removing device 100 described later and the polishing mechanism 20. A pair is arranged on the opposite side. The feed rolls 12A and 12B of each pair rotate in an interlocking manner by meshing gears (not shown), and the lower five feed rolls 12B of each pair can rotate in conjunction by a chain and a sprocket (not shown). All of the feed rolls 12B are connected and driven to rotate in both forward and reverse directions at the same peripheral speed by a single motor (not shown). The work is sandwiched between the feed rolls 12A and 12B in this order, and is fixed in the forward direction indicated by the arrow W in FIG. 1 (rightward in FIG. 1) and in the opposite direction opposite to the arrow W. It is designed to be transported 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 the conveyance distance of the work is detected by this. Then, the sensors 15A and 15 to be described later
Feed roll 12 based on the time when the detection signal from B is output
The conveying direction and timing 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 the two pairs of feed rolls 12A and 12B. These sensors 15A and 15B are
It is called a photoelectric switch that emits light toward the passage area of the work, detects the reflected light from the work and converts it into an electrical signal, and its light emitting and receiving part faces the upper surface of the work. . The sensors 15A and 15B are the conveyor 10
The positions of the front edge and the rear edge of the work above are detected, and the detection signal is output to a control circuit (not shown).

The control circuit controls the direction and timing of the conveyance of the conveyor 10, and the polishing mechanism 20 described later.
Control of driving and stopping of the oil, control of operation of the oil removing device 100 described later, and oil removing rolls 120A and 120 described below.
The operation of B, 130A, and 130B is controlled.

Next, the polishing mechanism 20 will be described. The polishing mechanism 20, as shown in FIG.
A long sanding belt 22 fed from the feeding roll 21, a winding roll 23 that winds the sanding belt 22 and a sanding belt 22.
It is composed of a contact roll 24 and a receiving roll 25 for contacting the workpiece with the work. 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 is connected to the motor 31 through a coupling 32 via a motor 31 that generates a rotational driving force in only one direction, and a reduction gear train (not shown) inside. And a speed reducer 33 accommodating therein. The speed reducer 33 is provided with a drive sprocket 34, a slanting lower part thereof is provided with a driven sprocket 35 which rotates integrally with the contact roll 24 coaxially, and a transmission sprocket is provided at a position adjacent to the winding shaft 23A of the winding roll 23. 36 are provided. An endless chain 37 is wound around these sprockets 34, 35, 36. As a result, the rotational driving force of the motor 31 is transmitted to the contact roll 24.

Further, the transmission sprocket 36 is provided with a transmission gear 38 which can be integrally rotated by way of a torque limiter 60 described later, and the transmission gear 38 is integrally rotated with the winding shaft 23A. It is meshed with the transmitted gear 39. As a result, the motor 31
The rotational driving force of (1) is transmitted to the winding roll 23. Then, due to the rotational driving force transmitted to the contact roll 24 and the winding force transmitted to the winding roll 23, the sanding belt 22 is moved to the feeding roll 2
While being unrolled from 1 and being wound up by the winding roll 23, it travels in one direction indicated by the arrow B in FIG. The running direction of the sanding belt 22 is the same as the forward conveying direction of the work (the arrow W direction in FIG. 1) at the polishing position where the sanding belt 22 can be wound around the contact roll 24 and contact the work. Also, sanding belt 22
The traveling speed of is set to be lower than the conveyance speed of the work.

The transmission sprocket 36 and the transmission gear 3 described above.
The torque limiter 60 interposed between the
It becomes the structure shown in. Transmission shaft 36 of transmission sprocket 36
A rotary body 61 integrally rotatably attached to A has a flange 62 formed thereon, a clutch ring 63 in the form of a thin plate ring, and a transmission gear 38 fixed to a mounting flange 65 on the outer periphery by bolts 66. 64, a thin plate ring-shaped clutch plate 67, and a pressing ring 68 are fitted in order. The elastic force of the disc spring 69 causes the clutch plates 63, 63 and the driven ring 64 to be sandwiched between the flange 62 and the pressing ring 68 in the axial direction. 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 relative to the transmission shaft 36A. It Therefore, the contact roll 2
While the rotation of No. 4 is always performed at a constant speed, the winding roll 23 is capable of rotating such that the angular velocity becomes smaller due to the action of the load. With this configuration, the winding speed of the sanding belt 22 by the winding roll 23 is increased even if the winding diameter is gradually increased as the winding of the sanding belt 22 on the winding roll 23 progresses. 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 drive mechanism 30 is controlled on the basis of the detection signals from the above-mentioned sensors 15A and 15B, and when a predetermined set time elapses with reference to the time when the detection signal is output to the control circuit, the sanding belt. 22
The traveling of the vehicle is started and the traveling of the vehicle is stopped.

As shown in FIG. 2, the tension mechanism 40 is composed of a tension roll 41 and a pressure roll 42. The tension roll 41 has a bracket 43.
Fixed shaft 4 which is fixed by a fixed position
4, a torque limiter (not shown) having a structure similar to that of the torque limiter 60 is interposed so as to be relatively rotatable. Therefore, the tension roll 41 only rotates due to slippage between the tension roll 41 and the fixed shaft 44 when the tension roll 41 receives the pulling force to the contact roll 24 side via the sanding belt 22, and receives the pulling force. It doesn't rotate while it's not there.

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, which is rotatably supported by a support rod 47A erected on the frame 47, is connected to the other end of the arm 46 so as to be relatively rotatable. The pressure roll is a tension roll 4 with the sanding belt 22 sandwiched by the pressure of operating air in the air cylinder 48.
It is pressed against 1.

As described above, the sanding belt 22 is
By being sandwiched between the tension roll 41 and the pressing roll and receiving the braking force of the torque limiter, it is possible to prevent looseness between the tension mechanism 40 and the winding roll 23, and to always maintain a tension state. it can.

As shown in FIG. 2, the braking mechanism 50 is composed of 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 rotatably connected to one end of the arm 53. A fixed shaft 56 is attached to the other end of the arm 53, and the braking roll 51 is rotatably supported on the fixed shaft 56 via a non-reversible clutch (not shown).

The braking roll 51 is pressed against 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 by the contact roll 24 is slightly displaced to the take-up roll 23 side from the position where the contact roll 24 contacts the sanding belt 22 with the work.

Further, the nonreciprocal clutch of the braking roll 51 has a structure in which two coaxial rotating members are engaged with each other so that they can rotate only in one direction, such as a ratchet mechanism. Therefore, although the braking roll 51 freely rotates with respect to the fixed shaft 56 in the same direction as the running direction of the sanding belt 22, the braking roll 51 is prevented from rotating in the opposite direction by the irreversible clutch.

While the contact roll 24 described above only rotates at a fixed position, the receiving roll 25 located directly below the contact roll 24 can be moved up and down by an elevating mechanism 70 shown in FIG. Explaining the lifting mechanism 70,
Gearbox 71 fixed to a frame not shown in FIG.
A male screw rod 72 whose axis is oriented in the vertical direction is freely supported only for rotation, and a worm 74 is meshed with a worm wheel 73 formed on the male screw rod 72.
Sprocket 74A integrally attached to the worm 74
A chain 76 is hung between the sprocket 75A (see FIG. 2) and the sprocket 75A integrally attached to the handle 75. When the handle 75 is rotated, the worm 74 and the worm wheel 73 mesh with each other to cause the male screw rod 72 to move. Is rotated.

At the upper end portion of the male screw rod 72 projecting from the gear box 71, a female screw hole 77A of an elevating body 77 is provided which can be freely moved up and down by a guide of a frame (not shown).
Are screwed together, and by the rotation of the male screw rod 72, the elevating / lowering body 77 descends and is adjusted to a predetermined height. In addition, when the rotation of the male screw rod 72 is stopped, the transmission of the rotational force from the worm wheel 73 side to the worm 74 side is blocked, so that the elevating body 77 is held at a constant height.

An air cylinder 78 having a piston rod 78A protruding upward is fixed to the lifting body 77.
The basic height of the air cylinder 78 is adjusted by changing the height of the lift 77 by operating the handle 75. Above the air cylinder 78, an arm 79B is attached to a bracket 79A standing on the frame 79.
Is supported in a cantilever state so that it can freely swing in the vertical direction.
The receiving roll 25 is rotatably supported by the arm 79B, and the air cylinder 78 is attached to the free end of the arm 79B.
Piston rod 78A is 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 above-mentioned sensors 15A and 15B, and a predetermined set time is set with reference to the time when the detection signal is output to the control circuit. When the time has elapsed, supply and discharge of operating air are performed.

When the air cylinder 78 operates to move the piston rod 78A back and forth, the receiving roll 25 swings up and down together with the arm 79B, and the receiving roll 25 pushes up the work to come into contact with the sanding belt 22 and from the work. It is adapted to be displaced between the lowered position and the separated position.

The height of the lowermost surface of the portion of the sanding belt 22 which 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 in the lowered position. Has been done. Therefore, when the receiving roll 25 is displaced to the lowered position, the work can pass through the polishing mechanism 20 without being polished. In addition, the receiving roll 25 pushes up the work and the sanding belt 2
In the state where the workpiece is in contact with the workpiece 2, the workpiece is slightly curved upward so as not to affect the conveyance.

The take-up roll 23 can be easily replaced by the mechanism shown in FIG. One end of the winding shaft 23A of the winding roll 23 is held by a swing bracket 83 that is swingably supported by a frame 81 by a support shaft 82. The bearing 8 is installed in the mounting hole 84 at the swing end of the swing bracket 83.
The rotary cylinder 86 is fitted to the rotary cylinder 86 through
Taper surface 86A of the winding shaft 23A by the bolt 87
The structure is pressed against. This allows the bolt 8
By removing 7, the winding shaft 23A is released from the pressure of the swing bracket 83. From this state, the take-up roll 23 can be removed by pulling it out in the axial direction. When the bolt 87 is removed, the swing bracket 83 comes into contact with the stopper 88 to be in the state shown by the chain line in FIG. 7. When mounting the take-up roll 23, the end of the take-up shaft 23A may be held in the reverse order of the above procedure.

Further, 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 left of the contact roll 24 in FIG.
Therefore, the cleaning oil is supplied to the work just before it contacts the sanding belt 22 when the work is first conveyed to the polishing mechanism 20. Further, 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 temporarily used for the polishing mechanism 20.
The cleaning oil is supplied to the work ground by (1). When the work is conveyed in the direction opposite to the arrow W in FIG. Can be supplied.

In FIG. 1, the arrow W indicates the polishing mechanism 20.
The oil removing device 100 is provided at a position spaced by a predetermined distance in the direction.
Is provided. As shown in FIG. 9, the oil removing device 100 has three pairs of pads 101A and 101B that are paired up and down with the conveyance surface of the work in between. Each pad 101A,
101B is attached to horizontal elongated support members 102A and 102B that are orthogonal to the conveyance direction of the work, and a sponge-like pressing member 104 is provided in a recess 103 of the support members 102A and 102B and a cloth made of a fibrous material such as felt. And an oil absorbing member 105 having a shape of a circle. Oil absorbing member 105
Is attached in a state of covering the pressing body 104 and being folded on both sides thereof, and is fixed by the fixing plate 106 and the screw 107 on the side surfaces of the supporting bodies 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 conveying direction, and the cleaning oil that adheres to the surface of the work is absorbed thereby.

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 which will be described later, and the lower pad 101B is fixed to the frame 108. Upper pad 10
In the state where 1A is raised, the height of the upper surface of the lower pad 101B is the same as that of the pair of feed rolls 12A and 12B located on both sides of the oil removing device 100 and the oil removing roll 12 described later.
The height is set so as not to come into contact with the lower surface of the work sandwiched between 0A and 120B and conveyed.

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

Next, the lifting mechanism 1 for the upper pad 101A
10 will be described with reference to FIG. A worm wheel 112 and a worm wheel 113 that mesh with each other are provided at two positions corresponding to both ends of the pad on the lower surface of the frame (not shown).
A bracket 111 that rotatably supports and is 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 vertically. A male screw rod 114 protruding downward from 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 the drive shaft 112A extending from the worm 112 is operated, the worm 11
2 through the engagement of the worm wheel 113 with the male screw rod 1
The rotation of 14 allows the support 115 to move up and down to adjust its height.

Air cylinders 1 are provided at both ends of the support 115.
16 is attached, and the piston rod 116 </ b> A protruding downward is connected to the elevating body 117.
The elevating body 117 is elongated in parallel with the pad 101A, and vertical guide pins 118 attached to both ends of the elevating body 117 are fitted in the guide holes 115B of the support 115 so as to freely move up and down. Further, the lifting body 117 has the above-mentioned supporting body 102A.
Is attached. Lifting body 117 and support body 102A
Means the bolt 11 at one end shown in FIG.
The height of the pad 101A can be adjusted by adjusting the height of the pad 101A.

In the lifting mechanism 110, the supply and discharge of operating air to and from 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 operating air is supplied and discharged when a predetermined set time has elapsed with reference to.

When the air cylinder 116 operates and the piston rod 116A moves back and forth, the lift 117 and the support 1
02A and the pad 101A are vertically displaced, and the pad 10
1A is displaced between a descending position where it abuts against the work and pushes it down, and an ascending position where it separates from the work, corresponding to the entry position of the work. At a position closer to the polishing mechanism 20 than the oil removing device 100, a pair of upper and lower oil removing rolls 120A, 1 for removing the cleaning oil adhering to the surface of the work.
20B is provided. Each support shaft 120A, 120B
Are rotatably supported by support shafts 124A and 124B, respectively. As shown in FIG. 8, the lower oil removing roll 120B is normally kept at a constant height with respect to the frame 121, but the bearing body 123 can be moved up and down by adjusting the bolt 122 as necessary. Allows the height to be adjusted. On the other hand, the upper oil removing roll 1
20A can go up and down. The support shaft 124A of the upper oil removing roll 120A is connected to the piston rod 125A of the air cylinder 125 fixed to the frame 121, and is driven up and down based on the detection signal from the sensor 15B.

Further, a pair of upper and lower oil removing rolls 130A and 130B having the same structure as the above are provided at the start end position (left end in FIG. 1) of the conveying path of the contact roll 24. The oil removing rolls 130A and 130B also use the upper oil removing roll 1 based on the 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 removing device 100.
0B is provided. This cleaning brush 140A, 14
0B is rotatably driven by a drive mechanism (not shown) to rub the surface of the work.
The foreign matter on the surface of the work is wiped and removed by 40A and 140B.

Next, the operation of this embodiment will be described. When the work is conveyed, the sanding belt 22 of the polishing mechanism 20 stops traveling, the receiving roll 25 is in the lowered position, the upper oil removing roll 130A is raised, and the upper pad 101A of the oil removing device 100 is raised. In position.

From 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 arrow W in FIG.
Sensor 15A on the starting end side that detects the position of the front edge of the work
Based on the detection signal from the above, the receiving roll 25 ascends 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. Along with this, the cleaning oil is supplied from the cleaning oil supply port 91A toward the work. As a result, the surface of the work is ground by the sanding belt 22 and hairline processing is performed. Sanding belt 2 at this time
Since the traveling speed of No. 2 is slower than the conveyance speed of the work, the polishing direction of the sanding belt 22 relative to the work is opposite to the arrow W. At this time, since the sanding belt 22 is kept in a tension state 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 constantly grinds the work uniformly.

Thereafter, based on the detection signal from the sensor 15A which has detected the position of the rear edge of the work, the trailing edge of the work finishes passing through the contact roll 24 and at the same time, the running of the sanding belt 22 is stopped and received. The roll 25 descends. Then, when it is detected that the trailing edge of the work has passed beneath the sensor 15B on the terminal end side, the conveyance of the work by the conveyor 10 is stopped based on the detection signal from the sensor 15A.

After that, the conveyor 10 restarts driving in the opposite direction to the above, and the work is conveyed in the direction opposite to the arrow W direction in FIG. At this time, the cleaning oil supply port 91B on the terminal side
Supplies the cleaning oil to the work. And
Based on the detection signal from the sensor 15B on the terminal side that detects the front edge (the left edge in FIG. 1) in the conveyance direction of the work, the front edge of the work arrives just below the contact roll 24 and at the same time the receiving roll 25. And the running of the sanding belt 22 resumes, and the hairline processing on the work is performed again. The relative polishing direction of the sanding belt 22 with respect to the work at this time is the same as the arrow W.

At this time, the sanding belt 22
Although frictional resistance in the direction opposite to the traveling direction is received by the contact with the work, the braking mechanism 50 prevents the sanding belt 22 from traveling in the opposite direction. Therefore, the sanding belt 22 is used for the braking roll 51.
The tension is maintained between the tension roll 41 and the tension roll 41 at all times, and the work is polished well.

While the work is reciprocated in this manner, the work is ground so that the polishing directions are opposite to each other on the forward path and the backward path, so that the hairline processing is performed twice. When the trailing edge (the edge on the right side in FIG. 1) in the transport direction of the work has finished passing through the contact roll 24, the receiving roll 25 descends and the sanding belt 22 stops running. Further, when the rear edge of the work 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.

After that, the arrow W is again conveyed by the conveyor 10.
The conveyance of the work in the direction starts. At this time, if hairline processing is performed on the work, the cleaning oil is supplied, the receiving roll 25 is raised, and the sanding belt 22 is run. When the hairline processing is not performed, the work passes through the polishing mechanism 20 without being supplied with the cleaning oil and without contacting the sanding belt 22 or the receiving roll 25. Then, foreign matter on the surface of the work is removed when passing through the cleaning brushes 140A and 140B, and cleaning oil on the surface of the work is removed while passing through the oil removing rolls 120A and 120B on the terminal side.

After this, the work enters the oil removing device 100, but three works are detected based on the detection signal from the sensor 15B on the end side which detects the front end (the right end in FIG. 1) in the conveying direction of the work. The pads 101A descend sequentially, and at the same time when the front edge of the work reaches directly below each pad 101A, the work is sandwiched between the pads 101B on the lower side. Then, while passing between the pads 101A and 101B, the cleaning oil on the surface of the work is absorbed and wiped off to be removed. At this time, the pad 10
1A descends only after the front edge of the work reaches directly under the pad 101A, and the pad 101A is not descended while the front edge of the work is positioned in front of the pad 101A. Therefore, even if the work is warped and the front end edge of the work is directed obliquely upward, there is no fear that the work front end edge abuts against the side surface of the pad 101A. After the oil removal 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 which detects the position of the workpiece conveyed by
Based on the detection signal from 5B, the running of the sanding belt 22 can be started when the work reaches a 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. It is also possible to prevent the sanding belt 22 from running even while the work is not present at the polishing position, so that a wasteful portion of the sanding belt 22 that is not used for polishing occurs.

Further, since the sensors 15A and 15B are provided at two locations on both sides of the polishing mechanism 20 in the workpiece transport direction, the workpieces are transported in the reciprocating direction and polished by the polishing mechanism 20 twice. It is possible to prevent the sanding belt 22 from traveling locally by controlling the traveling of the sanding belt 22 in accordance with the position where the work is conveyed, and to prevent the sanding belt 22 from having a locally worn area or a waste unused area.

Further, since the sanding belt 22 is not of an endless type but of a type which is unwound from the unwinding roll 21 and wound up by the winding roll 23, the total length of the sanding belt 22 is Is longer than an endless sanding belt. Therefore, one sanding belt 22 can be used for a long period of time and its replacement frequency is low.

The contact roll 24 is acted upon by the rotational drive force of the drive mechanism 30 and acts on the sanding belt 22 as the traveling drive force.
The sanding belt 22 can travel stably when it is polished while being conveyed in the direction opposite to 2.

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 this embodiment. With the hairline processing machine of, it is possible to perform any hairline processing according to a program other than the above. Specifically, (a) polishing is performed on the outward path of the workpiece (in the direction of arrow W in FIG. 1), and not on the return path,
Grind again on the second trip, (b) Do not grind on the first trip of the work, first grind on the return trip, polish the second on the second trip, (c) Figure the work Carry only once in the direction of arrow W of 1 to polish once,
(D) Various working methods are possible, such as making the work reciprocate two or more times and performing arbitrary polishing on the forward and return paths between them.

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

(1) In the above embodiment, the sanding belt 22 of the polishing mechanism 20 is described as an endless type which is fed from the feeding roll 21 and wound on the winding roll 23. A configuration using a sanding belt can also be used.

(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 the feed roll with a torque limiter.

(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, but the present invention is a pair of irreversible clutches. The braking mechanism can be configured by providing the braking roll in a state where it is not pressed against the contact roll. (4) In the above embodiment, the single driving mechanism 30 rotationally drives the contact roll 24 and winds the winding roll 23. 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 separate driving mechanisms.

(5) In the above embodiment, the case where the contact roll 24 is rotationally driven has been described. However, in the present invention, the contact roll 24 may 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 another detection means other than the photoelectric switch, such as magnetism or ultrasonic waves.

(7) In the above embodiment, the sensors 15A, 1
The case where 5B is provided at two positions on both sides of the polishing mechanism 20 in the work transfer direction for reciprocating the work has been described. However, the present invention has a sensor only at one position on the front side of the polishing mechanism in the work transfer direction. Alternatively, the work may be sailed and polished in only one direction.

(8) In the above embodiment, the running 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, and the work is subjected to hairline processing in both forward and reverse directions. When performing hairline processing in only one direction, the traveling speed of the sanding belt 22 may be set higher than the conveyance speed of the work.

[Brief description of 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 an elevating mechanism of a receiving roll.

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

FIG. 5 is an enlarged plan view showing a drive mechanism for 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 cutaway enlarged side view showing a bearing structure of a winding roll.

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

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

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

[Explanation of symbols]

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

Claims (2)

[Claims] 1. A sensor comprising: a polishing mechanism for performing hairline processing by bringing a sanding belt into contact with a work carried by a conveyor while the work is running; and a sensor for detecting the position of the work on the carrying path. A hairline processing machine configured to control the running of the sanding belt and its stopping based on a detection signal from the hairline processing machine. 2. The hairline processing machine according to claim 1, wherein the sensors are provided at two positions on both sides of the polishing position on the transport path sandwiching the polishing position by the sanding belt.