JPH0737558U - Belt type polishing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a belt type polishing device capable of polishing a curved surface of a product. [Structure] Rollers 9 are rotatably provided on the left and right ends of a base 2, an annular sander belt 3 is wound around the pair of rollers 9, and a material 4 to be polished is placed below the sander belt 3. 5 is provided so as to be movable in the front-rear direction with respect to the base 2. Holding member 7 having downwardly convex arcuate curved surface a on its lower surface
Is provided so that the lower side portion of the sander belt 3 is pressed by the arcuate curved surface a so that it can move up and down so as to approach the base 5.
When the pressing member 7 pushes the sander belt 3 downward,
The sander belt 3 is pressed onto the surface of the material (product) 4 to be polished, and the sander belt 3 slides and is polished by the rotation of the sander belt 3.
When the table 5 is reciprocally moved with respect to the pressing member 7 and the pressing force of the pressing member 7 is controlled, the arc-shaped curved surface a smoothly contacts with the designed curved surface of the material 4 to be polished, and the curved surface can be polished.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a belt-type polishing apparatus for placing a product and polishing a curved surface of the product.

[0002]

[Prior art]

 Conventionally, the surfaces of wood and coated materials of wood products have been polished and smoothed to make full use of the features of the wood and to improve the paint finish of the products (the same applies to metal products). This will improve the appearance and enhance the product value. When polishing a product, when the product surface is flat, the polishing member should be applied to the product surface and moved in the same direction, and pressing force should be applied in the same direction. Manual or manual operation of such a machine is required. It is finished with that.

[0003]

[Problems to be solved by the device]

 However, when the surface of the product is a curved surface, when polishing the surface, the polishing member must move along the curved surface, and the direction of the pressing force must be constantly changed, so that such an operation is performed by the machine. There is nothing to do, and it is the current situation that it is mostly done by skilled workers.

An object of the present invention is to provide a belt-type polishing device that can polish a curved surface of a product.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a pair of rollers on both ends of the base in the left-right direction so as to be rotatable with a shaft arranged in the front-rear direction with respect to the base, and the pair of rollers has an annular sander A base around which the belt is wound and on which the material to be polished is placed is provided below the sander belt so as to be movable in the front-rear direction with respect to the base, and a pressing member having a downward convex arc-shaped curved surface on the lower surface is provided. The lower part of the sander belt is provided so as to be movable up and down so as to be pressed by the arcuate curved surface to approach the base.

In the above apparatus, a structure may be added in which the pressing member is provided so as to be movable in the left-right direction of the base, and the lower part of the pressing member is rotatably supported in the front-back direction of the base. And a pad having an arcuate curved surface attached to the pad bracket. Further, a tension roller for pressing the upper portion of the sander belt upward is provided in the middle of the two rollers.

[0007]

[Action]

 Since the present invention is configured as described above, the sander belt can rotate above the table and can travel to one side along the surface of the table. When the pressing member having an arcuate curved surface pushes the sander belt downward, the sander belt is pressed against the surface of the material (product) to be polished, and the sander belt slides and is ground by the rotation of the sander belt. When the table is reciprocally moved with respect to the sander belt and the pressing force or pressing distance of the pressing member is controlled, the pressing member moves up and down along the designed curved surface of the material to be polished, and the arc-shaped curved surface under the pressing member is the polishing surface. Since it makes smooth contact with, it can polish curved surfaces.

Further, when the table is reciprocally moved, the pad attached to the lower part of the pressing member swings in the front-rear direction of the base and changes the angle along the curved surface, so that the polishing can be performed smoothly. By moving the pressing member in the left-right direction of the base, it is possible to polish a wide workpiece. In addition, it is easy to attach the sander belt by lowering the tension roller.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. A belt type polishing apparatus 1 shown in FIG. 3 will be described as an example of a polishing apparatus for polishing an arcuate surface. The belt-type polishing apparatus 1 includes a base 2 on which an annular sander belt 3 is extended in the left-right direction, and a base 5 on which a material to be polished (product) 4 is placed is provided below the sander belt 3. A guide rail 6 is stretched in the left-right direction above the base 5 above the base 5, and a pressing member 7 supported by the guide rail 6 is provided above the lower portion of the sander belt 3. Unless otherwise specified, the "horizontal direction" and "front-back direction" described below are all based on the base.

The sander belt 3 is wound around rollers 9, which are rotatably provided on shafts 8 arranged in the front-rear direction with respect to the base 2 at both left and right ends of the base 2, and a tension roller is provided at an upper portion of a central portion of the belt. It is wound around 10, and the tension roller 10 can descend (see FIG. 7). In this device, two types of sander belts 3 for finishing and rough finishing are arranged in parallel, and two sets of rollers 9, tension rollers 10 and the like are provided.

The table 5 on which the material to be polished 4 is placed is installed on rails 11 arranged at both ends of the base 2 in the front-rear direction. As shown in FIG. 6, the table 5 is movable on the rail 11, and the positioning plate 12 is attached to one side of the table 5 in the front-rear direction and the side of the positioning plate 12 on which the material 4 to be polished is placed. A suction port 13 is provided on the opposite side to and a suction pipe 14 is connected.

As shown in FIG. 4, the holding member 7 has an upper cover 15 and a lower cover 16, and the upper cover 15 is screwed via a bracket 17 to a mounting plate 19 to which a cylinder 18 is vertically fixed. (See FIGS. 1 and 2). The mounting plate 19 is fixed to a rod 20 extending from the base 2 side. As shown in FIGS. 1 and 2, the cylinder 18 is fixed so that the rod 21 extends downward, and the U-shaped support member 22 fixed to the tip of the rod 21 is brought close to the lower end of the mounting plate 19. There is.

Further, guide rods 23 are provided upright on both shoulders of the support member 22 and inserted into the guides 24 of the mounting plate 19. From the lower end of the mounting plate 19, stoppers 25 protrude downward on both sides while avoiding the support member 22 to restrict the movement of the pad bracket 26 pivotally supported by the support member 22. In particular, the expansion and contraction of the rod 21 and the traveling of the platform 5 are operated by using NC control or CPU in association with the position and height. The cylinder 18 is provided with an air balance mechanism to polish the rod 21. Set the height and the pressing force to operate.

A lower cover 16 is attached to the support member 22. A bearing 26 is provided on the support member 22 in the left-right direction, and a putt bracket 27 is attached to the putt bracket 27 so that the putt bracket 27 can rotate in the front-back direction of the base 2. The bottom surface of the pad 28 to be attached to the pad bracket 27 is an arcuate curved surface a. The concave portion 30 is engaged with the pawl 29 provided at the front and rear of the pad bracket 27 and the front pawl 29 is tightened by the handle 31. As for the position of the pad 28 in the left-right direction, one of the bearings 26 is provided with a screw so as to be fixed from the side surface so that the pad 28 is securely mounted.

As shown in FIGS. 4 and 5, the rod 20 fixed to the mounting plate 19 is expanded and contracted in the front-rear direction by the cylinder 33 fixed to the traveling device 32 provided on the base 2, and the two sander belts 3 are fixed. The pressing member 7 can be stopped above either one. The traveling device 32 reciprocates on the guide rails 6 according to the width of the material 4 to be polished. A control device 34 is provided adjacent to the base 2, and the base 2 can be leveled by adjusting the height of the foot 35 when the base 2 is installed.

Next, the operation of the polishing apparatus 1 according to the present invention will be described. When placing the material to be polished (or the product) 4 on the table 5, install it in alignment with the positioning plate 12 and enter the numerical value of the shape. This allows the left and right movement range of the pad 28 to be determined. Further, when the movement of the base 5 in the front-rear direction is also decided, and when roughing and finishing are continuously performed, it is possible to operate the cylinder 33 at the time of switching to change the front-back position of the pressing member 7. Next, the rotation speed and tension of the sander belt 3 are set, and the pressing force of the pad 28 is set.

When the polishing apparatus 1 operates, the sander belt 3 rotates above the table 5 and runs to one side along the surface of the table 5. When the platform 5 and the pressing member 7 are moved to the position of the sander belt 3 to be used and the pad 28 pushes down the sander belt 3 downward, the sander belt 3 running on the surface of the work 4 is polished. Will be pressed and the sander belt 3 will slide to polish. By moving the table 5 in the front-rear direction and controlling the pressing force or pressing distance of the pad 28, the pad 28 of the pressing member 7 can be moved along the designed curved surface of the material 4 to be polished.

At this time, since the pad bracket 27 is only rotatably attached to the bearing 26, the pad 28 freely tilts in the front-rear direction, and the arcuate curved surface a efficiently contacts the curved surface. The head pressure will be applied to the polishing area evenly. This improves the processing accuracy, improves the appearance of the bare wood in the case of wooden products, and improves the finish of painting of product 4. The finished product (material to be polished) 4 finished by the polishing apparatus 1 has a curved surface on the upper surface as shown in FIG. 8, with a convex center (a), convex end portions (b), and curved surfaces on both sides. There is something (c) with a hollow in the center.

When the pad 28 of the pressing member 7 is moved along the curved surface of the material to be polished 4, the guide rod 23 moves up and down according to the height of the curved surface of the material to be polished to make the pad 28 easy to move. , The pressure of the pad 28 is automatically maintained by the air balance mechanism so that the pressing force of the cylinder 18 becomes constant even if the height of the material to be polished increases and the pad 28 moves upward. It is supposed to be done. In addition, when the sander belt 3 is worn, the tension roller 10 can be lowered to facilitate the replacement operation. Further, since dust is sucked in through the suction port 13, the surrounding area can be kept clean.

[0020]

[Effect of device]

 The present invention is a belt-type polishing apparatus configured as described above. Since the sander belt is pressed against the material to be polished by the pad having an arcuate curved surface, the curved surface of the material to be polished can be smoothly polished. . Further, since the table on which the material to be polished is placed can be moved in the front-back direction and the pressing member that supports the pad can be moved in the left-right direction, the arc-shaped flat surface of the material to be polished can be uniformly polished.

[Brief description of drawings]

FIG. 1 is a side view of a pressing member used in a belt type polishing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the pressing member shown in FIG.

FIG. 3 is a perspective view of a belt type polishing apparatus of an embodiment.

FIG. 4 is a perspective view of a main part of the belt-type polishing apparatus shown in FIG.

FIG. 5 is a schematic diagram around the pressing member shown in FIG.

FIG. 6 is a partial perspective view of a base of the belt-type polishing apparatus shown in FIG.

FIG. 7 is a schematic view showing belt hooking of the belt type polishing apparatus shown in FIG.

8 is a perspective view showing products a, b, c finished by the belt-type polishing apparatus shown in FIG.

[Explanation of symbols]

 1 Belt-type polishing device 2 Base 3 Thunder belt 4 Material to be polished 5 Unit 7 Holding member 8 Axis 9 Roller 10 Tension roller 27 Pat bracket 28 Pat a Curved curved surface

Claims (4)

[Scope of utility model registration request] 1. A pair of rollers are rotatably provided on both ends of the base in the left-right direction with a shaft arranged in the front-back direction with respect to the base.
An annular sander belt is wound around the pair of rollers, and a base on which the material to be polished is placed is provided below the sander belt so as to be movable in the front-rear direction with respect to the base, and an arcuate curved surface convex downward is provided. A belt-type polishing apparatus, wherein a pressing member provided on a lower surface is provided so as to be movable up and down so as to press a lower side portion of the sander belt with the arc-shaped curved surface to approach the base. 2. The belt type polishing apparatus according to claim 1, wherein the pressing member is provided so as to be movable in the left-right direction of the base. 3. The lower portion of the pressing member is composed of a putt bracket rotatably supported in the front-back direction of the base and a putt having an arcuate curved surface attached to the putt bracket. Belt type polishing machine. 4. The belt-type polishing apparatus according to claim 1, wherein a tension roller for pressing the upper portion of the sander belt upward is provided in the middle portion of the two rollers.