JPH1044019A - Sanding head pressure mechanism for coated film surface sanding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure mechanism capable of making a sanding head for dry sanding the vehicle coated film surface on the side of a work of an automobile body or the like come in contact with the work surface corresponding to its configuration by virtue of suitable pressing force. SOLUTION: A horizontal head reciprocating device 6, which is supported on a head supporting plate 5 capable of making a reciprocating motion toward a work 1 in the longitudinal direction, is provided in front of a vertically movable frame 4 arranged on the side of a work moving passage and the head reciprocating device 6 end, which has a polishing sanding paper 30 for the work surface affixed to the surface, is provided with a sanding head 10 capable of adjusting the contacting pressure on the work surface by the differential pressure force of a plural number of cylinders arranged in symmetrical positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for pressing a sanding head in a device for sanding a coating film on a work such as an automobile body, and more specifically, polishing a vertical painted surface such as a side surface of the work with sandpaper. The present invention relates to a pressing mechanism for appropriately pressing a sanding head of a dry sanding device to a work surface.

[0002]

2. Description of the Related Art When painting a car body or the like, the work of polishing the undercoat film surface in the process before entering from the undercoat to the intermediate coat and in the process before entering from the intermediate coat to the overcoat is performed by using a brush that has conventionally been rotated. The brush water method of pressing against the surface of a coating film is widely used.

[0003] In the polishing by the brush water polishing method, a surface having irregularities such as the tip of a brush is moved while rotating while pressing against the surface of the coating film. There is a problem that dust projections and the like may remain, which inevitably causes unevenness in the polishing operation.

[0004] As a means for solving the problem of the polishing method by the water polishing method, there is an empty polishing apparatus in which a soft sanding head having sandpaper adhered to the surface thereof is pressed against a coating film surface of a work and uniformly rubbed. It is filed by Japanese Patent Application No. 7-256578.

[0005]

However, in the case of a work such as an automobile body, this sanding apparatus is a vertical type sanding in which a sanding head is pressed from above onto a horizontal coating surface such as a bonnet, a roof or a trunk and polished. As a means for keeping the sanding head close to the work, the sanding head can be suspended from above to below the coating film surface by using its own weight including the weight of the lifting device. .

Accordingly, if a balance weight of such a weight as to cancel the above-mentioned weight is suspended from the support mechanism of the sanding head, the sanding head can react with the reaction force from the coating surface due to the change in the shape of the workpiece during polishing. When a force is applied to lift the sanding head upward, the above-mentioned balance weight is lowered and the sanding head is raised slightly, so that the pressing force to the coating film surface can be kept average.

However, in a sanding apparatus in which the coating surface of the work is not a flat surface of the work such as a roof or a bonnet, but a vertical surface such as a side surface of a vehicle body, the sanding head is located on the side of the coating surface. The sanding head cannot be moved close to the side surface of the work by its own weight unlike the vertical sanding device described above.

Accordingly, when the sanding head receives a reaction force from the coating surface due to a change in the shape of the work, while the sanding head is always given a force of being pressed against the front surface of the coating film by means of a cylinder or the like. , Because the part that has received the reaction force must retreat appropriately in such a way that it responds instantaneously,
The structure in which the sanding head can always apply a pressing force to the workpiece coating surface by a single cylinder has a problem that it cannot appropriately cope with the retreating operation when receiving a reaction force from the workpiece.

[0009]

SUMMARY OF THE INVENTION According to the present invention, in order to solve the above-mentioned problems in the horizontal sanding apparatus, the sanding head is positioned side by side with respect to a vertical painted surface such as a side surface of a work such as an automobile. From the surface of the coating due to the change in the shape of the workpiece, and the part that has received the reaction is appropriately retracted in such a way that it responds instantaneously. Accordingly, it is an object of the present invention to provide a sanding device pressurizing mechanism adapted to the shape of the coating film surface.

The sanding head pressurizing mechanism of the sanding device according to the first aspect of the present invention has a movable frame that can move up and down along a column in a support frame on a side of a work moving passage as specific means for that purpose. A horizontal head reciprocating device supported by a head support plate capable of reciprocating in the front-rear direction toward the work is provided on the front surface of the movable frame, and a sanding material is provided on the surface at the tip of the head reciprocating device. The attached sanding head is rotatably connected so that the contact pressure with respect to the work surface can be adjusted by the differential pressure of a plurality of cylinders arranged at symmetric positions in the vertical and horizontal directions.

According to a second aspect of the present invention, in the sanding head pressing mechanism of the sanding apparatus, the means for adjusting the contact pressure with respect to the work surface by the differential pressure of a plurality of cylinders arranged at vertically symmetric positions is provided. The rod ends of a plurality of cylinders arranged in the vertical direction are connected to positions at different heights on the back surface of the sanding head.

According to a third aspect of the present invention, in the sanding head pressurizing mechanism of the sanding apparatus, the means for adjusting the contact pressure with respect to the work surface by the differential pressure of the plurality of cylinders disposed at symmetrical positions on the left and right sides includes: And a pair of left and right cylinders connecting between both sides of a connecting plate connected to a rod end of a central cylinder of the plurality of cylinders arranged at the right and left ends of the sanding head.

[0013]

FIG. 1 is a side view of the sanding apparatus according to the present invention. FIG. 1 is a side view of the sanding apparatus. A support frame 2 (one in the drawing) is provided. The support frame 2 has a movable frame 4 that can move up and down along a column 3. The movable frame 4 faces the work 1 on the front surface of the movable frame 4. Head support plate 5 that can reciprocate back and forth
, A plurality of horizontal head reciprocating devices 6 for sanding the side surface of the work 1 are mounted.

As shown in FIG. 3, the movable frame 4 in the support frame 2 has a central portion 4a which can move up and down along a guide rail 7 on the front surface of the column 3 in the support frame 2 and left and right side portions 4b. , 4c, and the motor 8 above the support frame 2
The lower end of the crank rod 9 is connected to the central portion 4a, and the movable frame 4 moves up and down along the column 3 to reciprocate the head reciprocating devices 6 in the vertical direction.

The movable frame 4 has a left portion 4b adjacent to a central portion 4a extending upward and a right portion 4c extending downward.
A plurality of horizontal head reciprocating units 6 for polishing the side surfaces of the upper stage, the middle stage, and the lower stage are provided so as to have different heights.

As shown in FIGS. 4 and 5, each of the head reciprocating devices 6 includes a movable frame member 4a, 4b,
The head support plate 5 is provided so as to reciprocate in the front-rear direction via an air cylinder 12 in front of the mounting plate 11 of 4c, and a plurality of air cylinders 13 provided on the back surface of the head support plate 5. And a sanding head 10 provided to reciprocate back and forth from the front surface of the head support plate 5.

The head support plate 5 is slidably movable via a guide rail 16 by means of a bracket 14 which has an arm 15 projecting horizontally from the back surface and projecting horizontally from a mounting plate 11 of the movable frame parts 4a, 4b, 4c. The air cylinder 1 which is supported and protrudes from the mounting plate 11
The tip of a second rod 20 is connected to the arm 15 and the operation of the cylinder 12 causes the head support plate 5 to move.
Moves the head reciprocating device 6 in the direction of the work 1 or reciprocates so as to be separated from the direction of the work 1.

The air cylinder 13 for reciprocating the sanding head 10 in the horizontal direction is provided on the rear side of the head support plate 5 beside the arm 15 and the cylinder 12. A plurality of stages (only the upper stage is shown in FIG. 4) are provided, and the tips of the rods 17 of these cylinders 13 are respectively connected to three connecting plates 19 behind the same number of the sanding heads 10 (see FIG. 4). FIG. 4 shows only the upper and lower rows, and FIG.
Then only the middle row is shown).

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. 18 and the rod 17
Are connected to the rear connecting plate 19 of the sanding head 10, respectively.

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. At each of the upper and lower ends and the center of the back surface, three elongated metal fixing plates 23 are attached with a space therebetween in a horizontally long direction, and the tip of a bracket 24 protruding from the front surface of the connecting plate 19. Is each fixed plate 2
3 is pivotally mounted on a central portion via a universal joint 25 so as to be rotatable in the vertical and horizontal directions.

As shown in FIG. 5 to FIG.
Only the middle connecting plate 19b of the two connecting plates 19 has both ends extending in both side directions, and air cylinders 26 and 27 are attached to both ends, respectively.
The distal ends of the rods 28 and 29 are pivotally mounted on both ends of the fixed plate 23 at the center of the rear surface of the soft plate work contact head 10 via a universal joint 55 so as to be rotatable in the vertical and horizontal directions. .

As shown in FIG. 5, the head 10 moves in the traveling direction A
In a no-load state where the workpiece 1 does not come into contact with the work 1 after the start of the work, as shown in FIG. The cylinder 26 located on the front side (lower side in FIG. 6) with respect to A is operated, and the front side of the head 10 is always pushed out and tilted with a constant force.

By inclining the front side of the head 10 as shown in FIG. 6, the head 10 can be brought into proper contact with the workpiece 1 which is traveling. When 28 is pushed back, FIG.
The rod 29 of the cylinder 27 on the rear side (upper side in FIG. 5) is pushed out by an amount corresponding to the rod 28 being pushed back, and the head 10 is made parallel to the traveling direction A of the work 1, or As shown in FIG. 7, depending on the shape of the work contact surface, the head 10 is inclined such that the rear side is pushed out.

On the other hand, as shown in FIG. 4, the upper and lower sides of the back surface of the head 10 composed of the rubber substrate 21 and the sponge-like soft plate 22, Since the tips of the rods 17 of the air cylinder 13 at the upper, middle, and lower three stages are connected to the rear side of the intermediate separate fixing plate 23, for example, the work 1
In the portion where the lower side of the lower cylinder 13 is retracted, as shown by a chain line 10b in FIG.
Is operated so as to be pushed out excessively, and the head 10 is deformed and brought into contact with the vertical direction along the traveling direction of the work 1 so as to conform to the shape of the work coating surface.

FIGS. 4 and 5 show a state where the head support plate 5 supporting the head reciprocating device 6 is pushed out toward the work 1 by the operation of the cylinder 12 at the start of the work. Then, according to the size or shape of the work 1 from the state, the head 10 is actuated by the upper, middle and lower three-stage air cylinders 13 to move the head 10 to the position shown by the solid line in FIG. The degree of approach to the work 1 is adjusted between the positions indicated by.

Further, as shown in FIGS. 4 and 5, on the upper and lower portions of the head support plate 5 for supporting the head reciprocating device 6, a delivery drum 3 of a sandpaper 30 is provided below.
1 and a take-up drum 32 provided with a drive motor 33 on the upper side
After the long sandpaper 30 is fed out from the feeding drum 31 provided with an air brake (not shown), the paper 30 is moved upward through the surface of the head 10. Take-up drum 32
It is designed to be wound up.

When the sandpaper 30 on the surface of the head 10 becomes old, a predetermined length of the sandpaper 30 is fed from the feeding drum 31, and the used sandpaper 30 is taken up by the take-up drum 32. The feeding drum 31 and the winding drum 32 are respectively provided with springs 34a and 3a for preventing loosening of the sandpaper 30.
4b is provided.

On the other hand, as shown in FIG. 8 and FIG.
There is provided a paper guide mechanism 35 for pressure bonding to the surface of the paper. The guide mechanism 35 arranges a shaft 38 that rotates via an air cylinder 36 and a link arm 37 on the back of the upper and lower fixing plates 23 in parallel with the length direction of the fixing plate 23, and A rotating arm 39 connected to both ends of the shaft 38 is provided outside the side edge.
And a movable side roller 40 that rotates in the front-rear direction via the control unit.

As shown in FIG. 9, on the back side (the right side in FIG. 9) of the rotating arm 39 and the movable roller 40, respectively, fixed from the rear end of a bearing 41 supporting both ends of the shaft 38. The arm 42 is protruded and this fixed arm 4
The fixed side guide bar 43 is provided at the tip of the movable side roller 4.
0, and is supported on the upper side of the head 10 on the introduction side of the sandpaper 30.
Is passed from the inside of the fixed guide bar 43 on the right side to the outside of the movable roller 40, passes through the surface of the head 10, and is guided to the lower feed side having the same configuration.

As shown by the solid line in FIG.
6 by pushing out the rod and rotating the rotating arms 39 at both ends of the shaft 38 forward (to the left in FIG. 9),
The sandpaper 30 can be freely moved away from the lower surface of the head 10.

On the other hand, between the two rotating arms 39 inside the movable roller 40, a rubber crimping piece 44 is provided at the tip.
9 is provided in parallel with the movable roller 40, and the rod of the air cylinder 36 is retracted as shown by a chain line in FIG. Is pivoted rearward (to the right in FIG. 9) to move the movable roller 40 in the direction of the fixed guide bar 43, thereby pulling the sandpaper 30 into close contact with the lower surface of the head 10, and at the same time Crimp bar 4
4 presses the sandpaper 30 against the fixed-side guide bar 43, so that the sandpaper 30 is firmly fixed to the surface of the head 10.

[0032]

According to the sanding apparatus of the present invention, the head support plate 5 of the head reciprocating device 6 is connected to the cylinder 1.
After the workpiece 1 is moved closer to the side surface of the work 1 by 2, the sanding head 10 whose back surface is supported by a plurality of fixing plates 23 is brought into contact with the surface of the work 1 by a plurality of air cylinders 13 arranged vertically. According to the shape of the workpiece coating surface, the positions of the upper and lower ends of the head 10 are inclined in the front-rear direction so that the head 10 can be appropriately brought into contact with the coating surface. When the reaction force is received, the air in the cylinder 13 at the portion where the reaction force is received is compressed and instantaneously retracts to appropriately follow the shape of the coating film surface. As a horizontal sanding device, high quality sanding action can always be expected with uniformity.

Also, since a pair of cylinders 26 and 27 are provided at symmetrical positions on both sides of the rear center fixing plate 23 of the head 10 via the connecting plate 19, the left and right sides of the head 10 are adjusted according to the shape of the workpiece coating surface. Since the positions of the both ends can be moved in the front-rear direction to be inclined, and the deformation of the right and left ends of the head 10 can be performed almost without difficulty on the work surface by the differential pressure of the respective cylinders 26 and 27. The contact pressure of the head 10 with the sandpaper on the workpiece coating surface is about 8 to 12 grams per cm ^{2 with} a very light touch. Can be sanded automatically.

The pair of left and right cylinders 26 and 27 at the center of the rear surface of the head 10 are used to replace the sandpaper 30 with a new unused portion of the sandpaper when the head 10 is replaced, as shown in FIG. By moving the sandpaper 30 in the front-rear direction in this state, or by inclining one of the sides as shown in FIGS. 6 and 7, it is useful to pull the sandpaper 30 and firmly adhere to the surface of the head 10.

[Brief description of the drawings]

FIG. 1 is a side view showing one side of a sanding head pressing 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 an angle change of the sanding head with respect to the work.

FIG. 7 is a partial plan view showing another angle change of the sanding head with respect to the work.

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: Connecting plate 21: Rubber substrate 22: Soft plate 23: Fixed plate 24: Bracket 25: Support shaft 26, 27: Air cylinder 28, 29: Rod 30: Sandpaper 31: Feeding drum 32: Winding drum 33: Motor 34a, 34b: Winding prevention spring 35: Paper guide mechanism 36: Air cylinder 37: Link arm 38: Shaft 39: Rotating arm 40: Moving side Roller 41: Bearing 42: Fixed arm 43: Fixed side guide bar 4 4: Crimp bar

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Goto 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Nissan Motor Co., Ltd. (72) Inventor Haruhumi Ito 3-8-10 Shibuya, Shibuya-ku, Tokyo Inside PCS Co., Ltd.

Claims (3)

[Claims] 1. A head support having a movable frame movable up and down along a support within a support frame on a side of a work moving passage, and a front and rear movable head reciprocatingly toward the work on the front surface of the movable frame. Providing a horizontal head reciprocating device supported by a plate,
At the end of the head reciprocating device, a sanding head having a sanding material attached to the surface is rotatably movable so that the contact pressure with respect to the work surface can be adjusted by the differential pressure of a plurality of cylinders arranged at symmetrical positions in the vertical and horizontal directions. A sanding head pressurizing mechanism of a coating surface sanding device, which is connected. 2. A means for adjusting a contact pressure on a work surface by a differential pressure between a plurality of cylinders arranged at symmetrical positions in a vertical direction. 2. The sanding head pressurizing mechanism of the coating film surface sanding apparatus according to claim 1, wherein the sanding head is connected to different positions on the back surface of the sanding head. 3. A means for adjusting a contact pressure with respect to a work surface by a differential pressure of a plurality of cylinders arranged at left and right symmetrical positions is connected to a rod end of a central cylinder in a plurality of cylinders arranged vertically. 2. The sanding head pressing mechanism of a coating film surface sanding apparatus according to claim 1, wherein both sides of the connection plate and left and right ends of the sanding head are connected by a pair of left and right cylinders.