JP3624361B2 - Coating surface sanding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sanding head pressurizing mechanism in a coating surface sanding device for a workpiece such as an automobile body, and more specifically, a sanding head of a dry sanding device for polishing a vertical coating surface such as a side surface of a workpiece with sandpaper. The present invention relates to a pressurizing mechanism for appropriately pressing the work surface.
[0002]
[Prior art]
When painting an automobile body, for example, the ground coating surface polishing process that is performed in the process before entering from the undercoat to the intermediate coat and before entering from the intermediate coat to the top coat, presses a rotating brush against the paint film surface. The brush water lab method is widely used.
[0003]
In this brush water polishing method, the uneven surface such as the tip of the brush is pressed against the coating surface and moves while rotating, so the coating surface after polishing is finished with fine uneven surfaces, dust projections, etc. However, there is a problem in that unevenness occurs in the polishing operation.
[0004]
As a means to solve the problems of the polishing method by the water-polishing method, an air research device that presses a soft sanding head with sandpaper on the surface against the coating surface of the workpiece and rubs uniformly is applied. No. 7-256578 is filed.
[0005]
[Problems to be Solved by the Invention]
However, this sanding device is a vertical sanding device that presses and sands the sanding head from the top to a horizontal coating surface such as a bonnet, roof, or trunk when it is a workpiece such as an automobile body. As a means for keeping the workpiece close to the workpiece, the sanding head can be hung from the upper side to the lower coating surface using its own weight including the weight of the lifting device.
[0006]
Therefore, if a balance weight with a weight that cancels the weight of the sanding head is suspended in the supporting mechanism of the sanding head, the sanding head receives a reaction force from the coating surface accompanying the shape change of the workpiece during polishing. When receiving a force that lifts upward, the balance weight is lowered to raise the sanding head lightly, and the pressure-bonding force to the coating surface can be kept at an average.
[0007]
However, in a sanding machine where the coating surface of the workpiece is not a flat surface of the workpiece such as a roof or a bonnet, but a vertical surface such as the side of the vehicle body, the sanding head is placed sideways to the side of the coating surface. Therefore, the sanding head cannot be moved close to the side surface of the workpiece by its own weight as in the vertical sanding device.
[0008]
Therefore, when the sanding head receives a reaction force from the paint film surface due to a change in the shape of the workpiece while a force that is always pressed against the work film surface in front by a means such as a cylinder, the reaction force In the structure where the sanding head can always apply the pressure contact force to the workpiece coating surface by a single cylinder, it must be properly retracted in such a way that the received part will respond instantaneously. There is a problem that it is not possible to appropriately cope with the backward movement when the reaction force is applied.
[0009]
[Means for Solving the Problems]
In order to solve the problems in the horizontal sanding apparatus as described above, the sanding head is always pressed with an appropriate force from the side against a vertical painted surface such as a side surface of a workpiece such as an automobile. At the same time, when receiving a reaction force from the paint film surface due to a change in the shape of the workpiece, the part that received the reaction force retracts appropriately in a form that responds instantaneously, and the shape of the paint film surface is restored. An object of the present invention is to provide a sanding device pressurizing mechanism that can be adapted.
[0010]
The sanding head pressurizing mechanism of the sanding device according to the invention of claim 1 has, as a specific means for that purpose, a movable frame that can move up and down along the support in the support frame on the side of the work movement passage, A horizontal head reciprocating device supported by a head support plate capable of reciprocating back and forth in the front-rear direction toward the workpiece is provided on the front surface of the movable frame, and sanding with a sanding material attached to the front end of the head reciprocating device The head is rotatably connected so that the contact pressure with respect to the work surface can be adjusted by the differential pressures of a plurality of cylinders arranged at symmetrical positions in the vertical and horizontal directions.
[0011]
In the sanding head pressurizing mechanism of the sanding device according to the second aspect of the present invention, the means for adjusting the contact pressure with respect to the work surface by the differential pressure of the plurality of cylinders arranged at the upper and lower symmetrical positions is provided in the vertical direction of the head reciprocating device. The rod ends of a plurality of arranged cylinders are connected to different positions on the back surface of the sanding head, respectively.
[0012]
Further, in the sanding head pressurizing mechanism of the sanding device according to the invention of claim 3, the means for adjusting the contact pressure with respect to the work surface by the differential pressure of the plurality of cylinders arranged at the left and right symmetrical positions is arranged in the vertical direction. Further, the present invention is characterized in that a pair of left and right cylinders are connected between both sides of a connecting plate connected to a rod tip of a central cylinder in a plurality of cylinders and left and right ends of the sanding head.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A coating surface sanding apparatus according to the present invention will be described in accordance with the illustrated embodiment. FIG. 1 is a side view of the sanding apparatus, and a pair of left and right (one in the drawing) supports on both sides of a moving path of a workpiece 1. A frame 2 is arranged, and the support frame 2 has a movable frame 4 that can move up and down along the support column 3, and can be reciprocated in the front-rear direction toward the workpiece 1 on the front surface of the movable frame 4. A plurality of horizontal head reciprocating devices 6 for sanding the side surface of the work 1 supported by a flexible head support plate 5 are attached.
[0014]
As shown in FIG. 3, the movable frame 4 in the support frame 2 includes a central portion 4a that can move up and down along the guide rails 7 on the front surface of the support column 3 in the support frame 2, and left and right side portions 4b and 4c. The lower end of a crank rod 9 driven by a motor 8 above the support frame 2 is connected to the central portion 4a, and the movable frame 4 moves up and down along the support column 3 to thereby move the head. The reciprocating device 6 is reciprocated up and down.
[0015]
The movable frame 4 has a left side portion 4b adjacent to the central portion 4a extending upward, and a right side portion 4c extending downward. A plurality of these movable frame portions for polishing the side surface of the workpiece 1 are provided. The horizontal head reciprocating device 6 is provided in the upper stage, the middle stage and the lower stage so as to have different heights.
[0016]
Further, as shown in FIGS. 4 and 5, each head reciprocating device 6 reciprocates in the front-rear direction via an air cylinder 12 in front of the mounting plate 11 of each of the movable frame portions 4a, 4b, 4c. Sanding provided to reciprocate in the front-rear direction from the front surface of the head support plate 5 through the head support plate 5 provided on the head and a plurality of air cylinders 13 provided on the back surface of the head support plate 5. It consists of a head 10.
[0017]
The head support plate 5 is slidably supported via a guide rail 16 by a bracket 14 that horizontally protrudes from the mounting plate 11 of each of the movable frame portions 4a, 4b, and 4c. At the same time, the tip of the rod 20 of the air cylinder 12 protruding from the mounting plate 11 is connected to the arm 15, and the operation of the cylinder 12 causes the head support plate 5 to move the head reciprocating device 6 toward the workpiece 1. It moves back and forth so as to move away from the direction of the workpiece 1.
[0018]
In addition, on the side of the arm 15 and the cylinder 12 on the back surface of the head support plate 5, the air cylinder 13 for reciprocating the sanding head 10 in the horizontal direction is arranged in three stages (upper, middle and lower) (see FIG. 4 shows only the upper stage), and the tips of the rods 17 of these cylinders 13 are connected to the same number of connecting plates 19 behind the sanding head 10 (in FIG. 4). Only the upper and lower stages are shown, and only the middle stage is shown in FIG. 5).
[0019]
As shown in FIG. 5, a pair of guide rods 18 parallel to the rods 17 are provided on both sides of each cylinder 13 so as to penetrate the head support plate 5. And the tip of the rod 17 are connected to the rear connecting plate 19 of the sanding head 10, respectively.
[0020]
As shown in FIGS. 4, 8 and 9, the sanding head 10 has a sponge-like soft plate 22 bonded to the surface of a single rubber substrate 21, and upper and lower surfaces of the rubber substrate 21. Three long and narrow metal fixing plates 23 are bonded to each other at both ends and the central portion at a distance from each other in the horizontal direction, and the tips of the brackets 24 projecting from the front surface of the connecting plate 19 are the respective ends. It is pivotally attached to the center portion of the fixed plate 23 so as to be able to turn in the vertical and horizontal directions via a universal joint 25.
[0021]
As shown in FIGS. 5 to 7, only the middle connection plate 19b of the three connection plates 19 has both ends extending in both sides, and air cylinders 26, 27, and the tips of the rods 28 and 29 of these cylinders 26 and 27 can be rotated vertically and horizontally through universal joints 55 at both ends of the fixed plate 23 at the center of the back surface of the soft plate work contact head 10. It is attached so as to be.
[0022]
As shown in FIG. 5, when the head 10 is in a resting state before and after the start of work, the head 10 is in a direction parallel to the traveling direction A of the work 1, but in a no-load state that does not contact the work 1 after the work starts. 6, among the cylinders 26 and 27 on the back of the head 10, the cylinder 26 located on the front side (lower side in FIG. 6) with respect to the traveling direction A of the work 1 is operated, The front side of the head 10 is always pushed and inclined with a constant force.
[0023]
By tilting the front side of the head 10 as shown in FIG. 6, the head 10 can be properly brought into contact with the workpiece 1 that is traveling, but the rod 28 of the cylinder 26 is moved backward by the contact pressure. As shown in FIG. 5, the rod 29 of the cylinder 27 on the rear side (upper side in FIG. 5) is pushed out as much as the rod 28 is pushed back, as shown in FIG. Or depending on the shape of the workpiece contact surface, an inclined state is adopted in which the rear side of the head 10 is pushed out as shown in FIG.
[0024]
On the other hand, with respect to the vertical direction along the traveling direction of the work 1 of the head 10, as shown in FIG. 4, the upper and lower and middle of the back surface of the head 10 comprising the rubber substrate 21 and the sponge-like soft plate 22 are separately provided. Since the tip of the rod 17 of the air cylinder 13 in the upper, middle, and lower three stages is connected to the back surface side of the fixed plate 23, for example, in a portion where the lower side of the work 1 is retracted As shown by a chain line 10b in the figure, the rod 17 of the lower cylinder 13 is operated to be pushed out excessively, and the head 10 is made to have the shape of the workpiece coating surface with respect to the vertical direction along the traveling direction of the workpiece 1. Deform and contact to fit.
[0025]
4 and 5 show a state in which the head support plate 5 that supports the head reciprocating device 6 is pushed toward the work 1 by the operation of the cylinder 12 as the work starts. According to the size and shape of the workpiece 1 from that state, the head 10 is indicated by the solid line in FIG. 4 and the right chain line 10a by the operation of the upper, middle, and lower three air cylinders 13. The degree to which the work 1 is moved between the positions is adjusted.
[0026]
Further, as shown in FIGS. 4 and 5, the upper and lower portions of the head support plate 5 for supporting the head reciprocating device 6 are provided with a feeding drum 31 for sandpaper 30 on the lower side and a drive motor 33 on the upper side. A take-up drum 32 is mounted on the shaft, and a long sandpaper 30 is fed from the feed drum 31 provided with an air brake (not shown). By way of this, it is wound around the upper winding drum 32.
[0027]
When the sandpaper 30 on the surface of the head 10 becomes old, the sandpaper 30 corresponding to a predetermined length is fed out from the feeding drum 31 and the used sandpaper 30 is wound up on the winding drum 32. The feeding drum 31 and the take-up drum 32 are respectively provided with springs 34a and 34b for preventing the loosening of the sandpaper 30.
[0028]
On the other hand, as shown in FIGS. 8 and 9, paper guide mechanisms 35 for pressing the sandpaper 30 to the surface of the head 10 are provided at both ends of the head 10. The guide mechanism 35 includes a shaft 38 that rotates on the back surface of the upper and lower fixing plates 23 via an air cylinder 36 and a link arm 37 in parallel with the length direction of the fixing plate 23, and A movable side roller 40 that rotates in the front-rear direction via a rotation arm 39 connected to both ends of the shaft 38 is provided outside the side edge.
[0029]
Further, as shown in FIG. 9, fixed arms 42 are respectively provided from the rear ends of the bearings 41 that support both ends of the shaft 38 on the back side (right side in FIG. 9) of the rotating arm 39 and the movable roller 40. A fixed guide bar 43 is supported at the tip of the fixed arm 42 in parallel with the movable roller 40 so that the sandpaper 30 is on the right fixed side on the introduction side of the sandpaper 30 above the head 10. From the inside of the guide bar 43 through the outside of the movable roller 40, it passes through the surface of the head 10, and is guided to the delivery side having the same configuration on the lower side.
[0030]
As shown by a solid line in FIG. 9, the rod of the air cylinder 36 is pushed out, and the pivot arms 39 at both ends of the shaft 38 are pivoted forward (left side in FIG. 9). It can move freely away from the lower surface.
[0031]
On the other hand, a crimping bar 44 in which a rubber crimping piece 44 a is embedded at the tip along the length direction is provided between the rotating arms 39 inside the movable roller 40 in parallel with the movable roller 40. 9, the rod of the air cylinder 36 is pulled in, and the rotating arm 39 is rotated backward (right side in FIG. 9), so that the movable roller 40 is fixed to the fixed guide bar. 43, whereby the sandpaper 30 is pulled and brought into close contact with the lower surface of the head 10, and at the same time, the crimping bar 44 crimps the sandpaper 30 to the stationary guide bar 43. Secure to the surface of the.
[0032]
【The invention's effect】
According to the coating surface sanding device of the present invention, the head support plate 5 of the head reciprocating device 6 is moved close to the side surface of the workpiece 1 by the cylinder 12 and then the back surface is supported by the plurality of fixing plates 23. Since the head 10 is brought into contact with the surface of the work 1 by the plurality of air cylinders 13 arranged in the vertical direction, the positions of the upper and lower ends of the head 10 are inclined in the front-rear direction according to the shape of the work coating film surface, When the reaction force from the paint film surface can be appropriately brought into contact with the coating film surface and the workpiece is changed in shape, the air in the cylinder 13 in the portion subjected to the reaction force is compressed. Because it retracts momentarily and appropriately follows the shape of the paint film surface, it can be expected to be a uniform and good quality sanding action as a horizontal sanding device for the vertically oriented paint film surface.
[0033]
In addition, since the pair of cylinders 26 and 27 are provided on both sides of the back center fixing plate 23 of the head 10 via the connecting plate 19 at left and right symmetrical positions, the left and right ends of the head 10 are arranged in accordance with the shape of the workpiece coating surface. The position of the head 10 can be tilted by moving the position in the front-rear direction, and the deformation of the left and right ends of the head 10 can be performed almost effortlessly with respect to the work surface by the differential pressure of the respective cylinders 26 and 27. under very light touch of 8 to around 12 grams per 1 cm ² of contact pressure to the workpiece coated surface of the head 10, the longitudinal direction of the coated surface such as the side surface of the workpiece automatically using sandpaper Can be sanded.
[0034]
The pair of left and right cylinders 26 and 27 in the center of the back surface of the head 10 are arranged so that when the sandpaper 30 is replaced, the head 10 is moved back and forth in a parallel state as shown in FIG. By moving in one direction or tilting one of the sides as shown in FIGS. 6 and 7, the sandpaper 30 is pulled to help tightly adhere to the surface of the head 10.
[Brief description of the drawings]
FIG. 1 is a side view showing one side portion of a sanding head pressurizing mechanism according to the present invention.
FIG. 2 is a plan view of the same part.
FIG. 3 is a front view in which a part of the same part is omitted.
FIG. 4 is a side view showing a configuration of a head reciprocating device.
FIG. 5 is a plan view of the head reciprocating device.
FIG. 6 is a partial plan view showing a change in angle of the sanding head with respect to the workpiece.
FIG. 7 is a partial plan view showing another angle change of the sanding head with respect to the workpiece.
FIG. 8 is a rear view of the sanding head.
FIG. 9 is a side view of the sanding head.
[Explanation of symbols]
1: Work 2: Support frame 3: Support column 4: Movable frame 5: Head support plate 6: Head reciprocating device 7: Guide rail 8: Motor 9: Crank rod 10: Sanding head 11: Mounting plate 12: Cylinder 13: Cylinder 14 : Bracket 15: Arm 16: Guide rail 17: Rod 18: Guide rod 19: Connection plate 21: Rubber substrate 22: Soft plate 23: Fixed plate 24: Bracket 25: Support shafts 26 and 27: Air cylinders 28 and 29: Rod 30: Sandpaper 31: Feeding drum 32: Winding drum 33: Motors 34a, 34b: Winding loosening prevention spring 35: Paper guide mechanism 36: Air cylinder 37: Link arm 38: Shaft 39: Rotating arm 40: Movable side Roller 41: Bearing 42: Fixed arm 43: Fixed side guide bar 44: Crimp bar

Claims (1)

A device that performs sanding on the vertical painted surface of the workpiece side surface, and has a movable frame that can move up and down along a support in a support frame on the side of the workpiece movement path, and is on the front surface of the movable frame. A plurality of horizontal head reciprocating devices supported by a head support plate capable of reciprocating back and forth toward the workpiece are provided, and a sanding head with a sanding material attached to the surface is provided at the tip of the head reciprocating device. has a pressure mechanism which is rotatably connected so as to be controlled by differential pressure of a plurality of cylinders arranged contact pressure vertically and horizontally symmetrical position with respect to the workpiece surface,
The means for adjusting the contact pressure by the differential pressures of the plurality of cylinders arranged at the upper and lower symmetrical positions on the side surface of the workpiece has the rod tips of the plurality of cylinders arranged in the vertical direction in the head reciprocating device, respectively. Pressure mechanism that connects to different positions of
Further, the means for adjusting the contact pressure by the differential pressures of the plurality of cylinders arranged at the left and right symmetrical positions on the side surface of the workpiece, the plurality of fixing plates provided in the vertical direction of the back surface of the sanding head, A pressure mechanism that provides a pair of cylinders at symmetrical positions via connecting plates on both sides, and moves and tilts the positions of the left and right ends of the sanding head in the front-rear direction according to the shape of the workpiece coating film surface. A coating surface sanding device characterized by being.

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