JPH0722888B2 - Paint putty sharpening device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coated putty sharpening device that polishes a surface to be polished having a coated putty on the surface of a railway vehicle or the like.

[Prior Art] Conventionally, the surface of a railway vehicle, tank truck vehicle tank, portable generator, building panel, etc., which has been coated with coating putty, is ground with a rotating polishing disc and The foundation is being adjusted. As shown in FIG. 6, as a device for polishing the surface to be polished, a rotating polishing disc A is pressed against the surface to be polished of a railroad car B and moved along the surface to be polished in the longitudinal direction of the railcar B. However, it has been known that when polishing to the end, some lapping margin is taken, then moving in the opposite direction for polishing, and this is repeated to polish the surface to be ground.

[Problems to be Solved by the Invention] However, in such a conventional device, the polishing disk A
When lapped and polished, a boundary was formed between the surface that was polished first and the surface that was polished later, and a ridge line C along the moving direction of the sharpening disc or a step may be generated. Therefore, the operator has to manually remove the ridge line C and the step, and if the coating is performed while the ridge line C and the step are left, the ridge line C and the step are raised on the coated surface, which is not preferable. was there.

Therefore, the present invention aims to solve the above problems,
An object of the present invention is to provide a paint putty sharpening device that can obtain a good polished surface without leaving ridges or steps.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configurations as means for solving the problems. That is, while having a moving mechanism for moving the up-down frame in the direction of the rail laid along the surface to be polished and in the vertical direction along the surface to be polished orthogonal to the rail, the vertical direction of the surface to be polished is also provided. A reciprocating mechanism for reciprocating the sharpening head with a predetermined amplitude smaller than the width of the sharpening head is provided in the upper and lower frames, and the sharpening disc is attached to the rotary shaft rotatably supported eccentrically by a predetermined amount at the tip of the main shaft of the sharpening head. Attaching, comprising a pressing mechanism for pressing the sharpening disc against the surface to be polished with a predetermined pressure, and moving the polishing disc pressed against the surface to be polished by the pressing mechanism while reciprocating by the reciprocating mechanism. That is the structure of the coating putty sharpening device.

[Operation] In the coating putty sharpening device having the above configuration, the pressing mechanism pushes the sharpening disc rotated by the sharpening head against the surface to be polished with a predetermined pressure, and the moving mechanism rails the sharpening disc pushed against the surface to be polished. The reciprocating mechanism reciprocates the sharpening disc in the vertical direction with a predetermined amplitude, and the sharpening head rotates the main spindle to rotate the sharpening disc around the main spindle and rotate around the rotary shaft. Then, the sharpening disc is moved in zigzag while pressing it against the surface to be polished with a predetermined pressure, and a good surface to be polished is obtained.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of a paint putty sharpening device according to an embodiment of the present invention. In this paint putty sharpening device, two rails 1 are laid along the side surface of the railroad vehicle as a surface to be sharpened G, and on this rail 1, a trolley main body 2 is rotatably supported. The bogie main body 2 is mounted via the individual wheels 4 (only three of which are shown). The two wheels 4 are connected by a rotary shaft 6, and a sprocket 8 is fitted on the rotary shaft 6, and the sprocket 8 and the rotary shaft of a motor 10 with a brake mounted on the carriage main body 2 are connected to each other. A chain 14 is stretched between the sprocket 12 and the fixed sprocket 12. Also,
A rotary shaft of an encoder 16 that outputs a signal according to the rotation of the rotary shaft 6 is connected to one end of the rotary shaft 6, and detects the amount of movement of the carriage main body 2 along the ground surface G. It is designed to be able to.

Further, four pillars 18 are erected on the trolley body 2, and an upper frame 20 is fixed to the tips of the four pillars 18,
Each pillar 18 is connected at its tip. Four guide rollers 22 (only three are shown) are rotatably supported on the upper frame 20, and the guide rollers 22 hold a guide rail 24 provided in parallel with the rail 1. It is designed to prevent falling.

On the other hand, four vertical guide rails 28 are attached along the side surface of each column 18, and the vertical guide rails 28 include eight vertical rails 30 rotatably supported by the vertical frame 30. Two vertical guide rails 32 (only three are shown) are engaged with each vertical guide rail 28 so as to guide the vertical frame 30 in the direction of arrows A and C perpendicular to the rail 1 direction. Has been done. Also,. The upper and lower frames 30 have two chains
Both ends of 34 are fixed, and this chain 34 is rotatably supported on the upper frame 20 and two sprockets 38 fitted on a rotation shaft 36 rotatably supported on the carriage main body 2. Between the two sprockets 42 fitted to the rotating shaft 40
Each is stretched. A drive sprocket 44 is fitted on the rotary shaft 36, and a chain 50 is provided between the rotary sprocket 44 and a sprocket 48 fixed to the rotary shaft of a motor 46 with a brake mounted on the trolley body 2. It is stretched. Further, a rotary shaft of an encoder 52 that outputs a signal according to the rotation of the rotary shaft 36 is connected to one end of the rotary shaft 36, and the movement amount of the up / down frame 30 in the arrow A and C directions in the drawing is indicated. It is designed to be able to detect. The moving mechanism 26 is configured by these.

Inside the vertical frame 30, there are provided four front and rear rails 54 for guiding in a direction perpendicular to the surface G to be ground. On these four front and rear rails 54, eight front and rear guide rollers 58 rotatably supported by a front and rear frame 56 (only four are shown)
Are engaged with each of the front and rear rails 54,
The front-rear frame 56 is guided in the direction of arrow B in the figure.

Further, in the front-rear frame 56, two reciprocating guide rails 60 for guiding in a direction orthogonal to the rail 1 and in a direction parallel to the surface to be ground G are provided. Four reciprocating rollers 64 (only two are shown) rotatably supported on the side surface of the reciprocating table body 62 are fitted into the grooves 60a of the two reciprocating guide rails 60, respectively. Has been done. Further, four guide rollers 66 (only one is shown) rotatably supported on the back surface of the reciprocating table body 62 are in contact with the reciprocating rail 60, and the reciprocating table body 62 is indicated by arrow A in FIG. And C direction. Further, the front end of the lot of the trunnion type air cylinder 68 supported by the front and rear frame 56 is fixed to the reciprocating table body 62. Furthermore,
Adjust stoppers 70 and 71 are provided on the upper and lower surfaces of the front-rear frame 56, respectively, and the reciprocating table body 62 includes
Stoppers 72 and 73 are arranged at positions opposed to the adjust stoppers 70 and 71, respectively. When the reciprocating table body 62 moves in the directions of arrows A and C in the figure, one of the stoppers 72, 7
3 collides with one of the adjusting stoppers 70, 71 and can reciprocate with a predetermined amplitude within the range until the collision. By these, the reciprocating mechanism 74 is configured in the front-rear frame 56.

On the other hand, four guide bars 48 (only two of which are shown) slidably supported by bearings 76 are inserted through the reciprocating table body 62 in a direction perpendicular to the surface to be ground G, A pressing plate 80 is fixed to the tip of the guide bar 78. A connecting plate 82 is fixed to the other end of the guide bar 78, and the pressing plate 80 is movable with respect to the reciprocating table body 62 in the direction of arrow B in the drawing. Further, an air cylinder 84 is attached to the reciprocating table body 62, and the tip of the lot of the air cylinder 84 is fixed to the pressing plate 80. These are incorporated into the reciprocating table main body 62 to configure a pressing mechanism 86.

Two brackets 88 are attached to the pressing plate 80, and swinging shafts 92, 94 each having one end fixed to a head body 90 are attached to the two brackets 88, respectively.
The head main body 90 is swingably supported via 6,98 so that it can swing about an axis parallel to the rail 1 direction. The other end of one swing shaft 92 is
A rotary shaft of an encoder 100 that outputs a signal according to the swing of 92 is attached, and the swing angle of the head main body 90 can be detected. Further, a wheel gear 102 is fitted on the other swing shaft 94, and a worm gear 104 rotatably supported by a bracket 88 is meshed with the wheel gear 102. To the worm gear 104, the rotary shaft of the motor 106 with a brake attached to the bracket 88 is connected.

On the other hand, in the head body 90, the main shaft 110 is
Is rotatably supported, and at the tip of the main shaft 110, a rotary shaft 1 rotatably supported by a bearing 112 is centered on a rotation center of the main shaft 110 and a rotation center that is eccentric by a predetermined amount.
14 are provided. A disc-shaped back plate 116 and a face plate 118 which is also a disc-shaped veneer plate are laminated and attached to the rotating shaft 114. An elastic cushion 120 made of sponge rubber is attached to the face plate 118, and a sharpening disc 122 is attached to the cushion 120 via spacers 124 and 125. The sharpening disc 122 is made of a stitched glass fiber as a base material and an abrasive is fixed to the sharpening disc 122 so that the surface G to be sharpened can be polished. Also, the spacer
As shown in FIG. 4, 124 and 125 are strips having elasticity, and spacers 124 are provided at five locations at equal intervals on the outer peripheral side of the grinding disc 122, and smaller spacers 125 are provided at two locations inside. Each is arranged.

The hood 126 that covers the periphery of the sharpening disc 122 is the head body.
It is fixed to 90, and the hood 126 is connected to the dust collector 128 mounted on the trolley body 2. Also this hood 1
It is fixed to 26, and four photoelectric switches 130 to 133 are arranged around the sharpening disk 122 at the upper right, upper left, lower left, and lower right, respectively, up to the detected object detected by the photoelectric switches 130 to 133. In this embodiment, a signal is output when the distance is about 100 mm.
Further, photoelectric switches 134 and 135, which are fixed to the bracket 88 and output a signal when the surface to be ground G is detected, are arranged on both sides of the grinding disk 122 at the same height as the main shaft 110. In the present embodiment, a signal is set to be output when the distance to the object to be detected detected by 134 and 135 becomes about 500 mm.

On the other hand, a pulley 136 is fitted to the other end of the main shaft 100, and between the pulley 136 and the pulley 138 fitted to the rotating shaft of the air motor 137 fixed to the head body 90,
The timing belt 140 is stretched. With these, the sharpening head 142 is configured with the head main body 90 as the center.

In addition, the above-mentioned motor with brake 10,46,106, encoder 1
6,52,100, dust collector 128, photoelectric switches 130 to 133, photoelectric switches 134 and 135, etc. are operation panels 143 mounted on the trolley body 2.
It is connected to the.

Next, the operation of the coating putty sharpening device of this embodiment will be described.

First, drive the motor 10, and then the sbrocket 12 and chain.
14, the wheels 4 are rotated together with the rotary shaft 6 via the sprockets 8 to move the carriage main body 2 along the rails 1 in the direction of arrow D in FIG. By this movement, the sharpening head 14
When the to-be-polished surface G is detected by both photoelectric switches 134 and 135 arranged on the left and right sides of 2, the compressed air of a predetermined pressure is supplied to the air cylinder 84, the air cylinder 84 is driven, and the guide bar is driven.
First, the sharpening head 142 is guided together with the pressing base 80 by the 78.
Move in the direction of arrow B in the figure.

Next, when the sharpening head G is detected by the photoelectric switches 130 to 133 by the movement of the sharpening head 142 in the direction of the sharpening surface G,
Compressed air is supplied to the air motor 137 from an air source (not shown), the air motor 137 is rotationally driven, and the pulley 138,
The main shaft 110 is rotationally driven via the timing belt 140 and the pulley 136. The rotation of the main shaft 110 causes the sharpening disk 122 to rotate together with the rotary shaft 114, the back plate 116, the face plate 118, the cushion 120, and the spacer 124 around the rotation center of the main shaft 110. Further, the motor 106 is driven to drive the worm gear 104,
The head main body 90 is swung through the wheel gear 102 and the swing shaft 94 to bring the spindle 110 into a horizontal state, or the spindle 110 is tilted in advance according to the inclination angle of the surface G to be sharpened, and the sharpening disc 122 is removed. It is set so that the surface to be ground G is parallel. The air disk 137 is rotated by rotating the sharpening disk 122 immediately before the sharpening disk 122 contacts the surface G to be ground.
This prevents the sharpening disk 122 from rotating at high speed by the air motor 137 in the no-load operation.

Further, the sharpening head 142 moves toward the surface G to be ground,
The sharpening disk 122 of the sharpening head 142 comes into contact with the surface G to be ground, and the pressing force of the air cylinder 84 presses the sharpening disk 122 against the surface G to be ground with a predetermined pressure. The grinding disc 122 pressed against the surface to be ground G is rotated about the center of rotation of the main shaft 110 due to the frictional force with the surface to be ground G and the like, and the center of rotation of the rotating shaft 114 that is eccentric to this center of rotation. Also rotates around. The sharpening disc 122 performs a so-called double action movement. Also, the cushion 12
Since 0 is provided, even if the surface to be ground G is slightly curved or wavy, the entire surface of the grinding disc 122 is in close contact with the surface to be ground G.

In this embodiment, the feed screw shaft 146 rotatably supported by the bearings 144 on the upper and lower frames 30 is rotated by the manual handle 148 fixed to one end of the feed screw shaft 146, thereby Through the nut 150 screwed and fixed to the front-rear frame 56, along with the front-rear frame 56 along the rail 54,
The pressing mechanism 86 and the sharpening head 142 can be moved in advance toward the surface G to be polished. As a result, the surface to be ground G
Depending on the positions of the pressing mechanism 86 and the sharpening head 142,
When the carriage main body 2 is moved, both photoelectric switches 134,
135 can be set at an appropriate position where the surface to be ground G can be detected, and the surface to be ground G can be positioned within the stroke of the pressing mechanism 86.

On the other hand, when the surface to be ground G is inclined or the surface to be ground G is curved, the surface to be ground G can be detected by the photoelectric switches 130 to 133 and the grinding head 142 can be swung. . For example, the upper two photoelectric switches 130, 13
When 1 detects the polished surface G and the two lower photoelectric switches 132 and 133 do not detect the polished surface G,
Until the two lower photoelectric switches 132 and 133 detect the surface G to be ground, the motor 106 is driven to swing the main shaft 110 so that the grinding disc 122 is parallel to the surface G to be ground. You can also

The air cylinder 84 and the air motor 137 are driven, and compressed air is supplied to the air cylinder 68 to reciprocally drive the air cylinder 68, and the reciprocating table body 62 is moved along the guide rail 60 in the directions of arrows A and C in FIG. And reciprocate with a predetermined amplitude. With the reciprocating motion of the reciprocating table body 62, the pressing mechanism 86 and the polishing head are pressed while the polishing disc 122 is pressed against the surface G to be polished.
142 also reciprocates.

As a result, the carriage main body 2 is moved in the direction of arrow D in FIG. 1 and is reciprocated in the directions of arrows A and C in FIG. 1 while the sharpening disc 122 is pressed against the surface G to be ground. That is, the fifth
As shown in the figure, the sharpening disk 122 moves in a zigzag manner while performing double action movement on the surface G to be sharpened and further reciprocatingly moving. By adjusting the reciprocating speed of the air cylinder 68 or the moving speed of the carriage main body 2 by the motor 10, the angle θ formed by the zigzag shown in FIG. 5 can be adjusted.

Further, while the sharpening disc 122 is rotating, the dust collector 128 is operated, and the scraped powder is sucked into the dust collector 128 via the hood 126. Furthermore, since the sharpening disc 122 is a stitch,
The scraped powder is sucked into the dust collector 128 through the hood 126 through the gap formed by the spacers 124 and 125 without clogging the grinding disc 122.

The sharpening disk 122 has moved along the surface to be ground G and reached the end of the surface to be ground G, and a certain period of time has passed since the surface to be ground G was not detected by one of the photoelectric switches 134 and 135. When this is done, the drive of the motor 10 is stopped and the movement of the trolley body 2 is once stopped. In addition, the drive of the air cylinder 68 is stopped to stop the reciprocating motion.
By driving 84 in the reverse direction, the sharpening head 142 is retracted to separate the sharpening disc 122 from the surface G to be ground, and the air motor 137 is moved.
To stop the rotation of the sharpening disc 122.

Next, drive the motor 46 to drive the sprocket 48 and chain.
The rotating shaft 36 is rotated via the 50 and the sprocket 44. By the rotation of the rotating shaft 36, the vertical frame 30 is raised in the direction of arrow A in FIG. 1 via the sprocket 38 and the chain 34. When the encoder 52 detects that the predetermined distance has been increased, the driving of the motor 46 is stopped. This allows
The sharpening disc 122 is stopped at a position where it is raised by a predetermined amount.

Then, again, as described above, the motor 10 is driven,
While the carriage main body 2 is moved in the opposite direction to the above, the air motor 137, the air cylinder 84, and the air cylinder 68 are driven to press the sharpening disc 122 against the surface G to be ground with a predetermined pressure to reciprocate. As a result, as shown in FIG. 5, the surface to be ground G is polished as described above to remove unnecessary putty. By repeating the above-mentioned operation, it is possible to remove the unnecessary putty on the polished surface G in a wide range. At this time, by adjusting the amount of rise of the vertical frame 30, it is possible to properly adjust the amount of lap between the previously ground surface G and the ground surface.

If the surface to be ground G has holes such as windows or doors,
The surface to be ground G is cut by one of the photoelectric switches 134 and 135.
When it is no longer detected, it is determined that there is a hole portion, and when the hole portion is detected, the carriage main body 2 is moved and the driving of the air cylinder 68 is stopped to stop the reciprocating motion.
By driving the air cylinder 84 in the reverse direction, the sharpening head 142 is retracted to separate the sharpening disc 122 from the surface G to be ground,
The drive of the air motor 137 is stopped to stop the rotation of the sharpening disc 122. Next, pass through the hole and both photoelectric switches 13
When the surface to be ground G is detected by 4,135, the air motor 137, the air cylinder 84, and the air cylinder 68 are driven to press the grinding disk 122 against the surface to be ground G with a predetermined pressure to reciprocate the surface to be ground. The polishing of the surface G can be continued.

As described above, in the coating putty sharpening device of this embodiment, the sharpening disk 122 rotated by the air motor 137 is removed from the surface G to be ground.
A pressing mechanism 86 presses it at a predetermined pressure. Further, the sharpening disc 122 is reciprocated by the reciprocating mechanism 74, and the sharpening disc 12 is moved along the surface G to be sharpened by the moving mechanism 26.
2 is moved to move the grinding disk 122 in a zigzag manner on the surface G to be ground, and the surface G to be ground is polished to remove unnecessary putty.

Therefore, the polishing disk 122 is pressed against the surface G to be polished with a predetermined pressure by the pressing mechanism 86 while the surface G to be polished is being polished, and the moving mechanism 26 and the reciprocating mechanism 74 zigzag the surface G to be polished. Move to and sharpen disc 122
In addition to the rotation about the rotation center of the main shaft 110, the rotation about the rotation center of the rotation shaft 114, which is eccentric to the center of the main shaft 110, causes a circle on the surface to be polished as shown in FIG. Since the object is moved as it is drawn, no ridgeline or step is formed on the surface to be ground G, and it is possible to perform a good foundation adjustment work before painting.

Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and it goes without saying that the present invention can be implemented in various modes without departing from the scope of the present invention.

[Effects of the Invention] As described in detail above, in the coated putty sharpening device of the present invention, the sharpening disc is pressed against the surface to be sharpened with a predetermined pressure, and further reciprocally moved, and on the surface to be sharpened in a circular motion. Since the tool moves in a zigzag manner, there are no ridges or steps on the surface to be ground, and each point on the grinding disk moves on the surface to be ground at a substantially uniform speed according to the amount of eccentricity between the spindle and the rotary shaft. Since it moves, it has the effect of extending the life of the sharpening disc.

[Brief description of drawings]

1 is a perspective view of a coating putty sharpening device as an embodiment of the present invention, FIG. 2 is a sectional view of a pressing mechanism of the present embodiment, FIG. 3 is a sectional view of a sharpening head of the present embodiment, and FIG. FIG. 5 is a front view of the sharpening disc of this embodiment, FIG. 5 is an explanatory view of a movement locus of the sharpening disc moving on the surface to be sharpened of this embodiment, and FIG. 6 is a sharpening disc moving on the surface of the conventional sharpening disc. It is explanatory drawing of the movement locus of a disc. 1 …… Rail, 26 …… Moving mechanism 86 …… Pressing mechanism, 74 …… Reciprocating mechanism 122 …… Sharpening disc, 142 …… Sharpening head

Claims (1)

[Claims] 1. A moving mechanism for moving a vertical frame along a direction of a rail laid along a surface to be polished and in a vertical direction along the surface to be polished orthogonal to the rail, and further comprising: A reciprocating mechanism for reciprocating the sharpening head with a predetermined amplitude smaller than the width in the vertical direction is provided in the vertical frame,
A sharpening disc is attached to a rotary shaft rotatably supported by a eccentric amount of eccentricity at the tip of the main shaft of the sharpening head, and a pressing mechanism for pressing the sharpening disc to the surface to be polished with a predetermined pressure is provided. A paint putty sharpening device, wherein the sharpening disc pressed against the sharpening surface is moved by the moving mechanism while being reciprocally moved by the reciprocating mechanism.