JPH07121503B2 - Polishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is mainly used for polishing wood such as furniture and joinery.
In addition to the functionally applicable range, it relates to a polishing device used for polishing a synthetic resin or a metal.

<Prior Art> A frame part of a door or a decorative plate that is generally used for furniture, fittings, etc., in which a linear uneven line is formed along the outer periphery, is machined similarly to other decorative surfaces. After forming the uneven lines, the material is polished and the coated surface is polished to polish the coated surface.

For example, when mechanically polishing the surface of a frame material (working material) 51 on which arc-shaped concavo-convex strips 51a and 51b are formed as shown in FIG. 9, a straight table 52 as shown in FIG. Processed material 51
And feed it linearly, and above it, stretch the endless belt-shaped sandpaper 54 interlocked with the rollers 53, 53 along the feed direction of the work material, which is opposite to the feed direction. While driving the belt in the direction
A device is known in which the sandpaper 54 between 53 and 53 is pressed against the surface of the processed material with a pad 55, and the pressing surface of the pad 55 is an uneven surface along the uneven lines 51a and 51b.

<Problems to be Solved by the Invention> However, the conventional belt-shaped sandpaper has the following problems.

B) Strong tension is generated on the belt-shaped sandpaper, and when the pad is pressed, the peaks of the processed material are strongly ground, but the valleys and steep slopes cause poor polishing or deep grooves,
It is impossible to polish fine grooves and corners at the edges of processed materials.

B) As mentioned above, the contact pressure of the belt on the uneven surface is uneven, so if the valleys (grooves) are sufficiently ground, the peaks will be over-polished, and in the polishing after coating, there will be parts where the paint is scraped off. It is impossible to polish the coated surface.

C) Since the pad is pressed against the inner surface of the driven belt, the back surface of the belt and the pad are heavily worn, and it is necessary to attach a wear resistant resin to the pad surface or add a wear resistant material such as graphite.
There is a large loss in labor and cost.

D) Since the pad is pressed against the driving belt to give resistance, the driving force of the belt-shaped sander becomes excessive and it is necessary to firmly clamp the processed material on the bed, but the high expansion force It is economically inconvenient because it requires the use of a belt to increase the power of the feed drive.

E) Since the entire sandpaper is always used, there is a large difference in polishing performance between the beginning and end of use (at the end of its life), resulting in variations in finishing accuracy.

F) In the conventional belt type, as shown in FIG. 9, unless the pad width is made narrower than the belt width, the belt-shaped sandpaper comes off from the pad, which is uneconomical because the entire belt cannot be used.

<Means for Solving the Problems> The present invention is intended to solve the above-mentioned problems, and particularly to provide a polishing apparatus that has a small feed resistance of a pressure material and a driving resistance on the side of sandpaper and has a good polishing performance. According to a first aspect of the present invention, a table on which a processed material is placed and which feeds the processed material in a fixed direction is stretched in a direction that is close to the same processed surface of the processed material and that intersects the feed direction of the processed material. Belt-shaped first and second sandpapers, first and second pads that press the respective polishing surfaces of the first and second sandpapers against the processing surface under the action of an actuator, and the first and second sandpapers A drive mechanism that integrally reciprocates the pad along the feed direction.

A second invention of the present application is a table on which a work material is placed and which feeds the work material in a fixed direction, and a table which is close to the same work surface of the work material and which intersects the feed direction of the work material. Belt-shaped first and second sandpapers stretched, first and second pads for pressing the respective polishing surfaces of the first and second sandpapers against the processing surface under the action of an actuator, and the first and second pads A drive mechanism for integrally reciprocating the first and second pads along the feed direction, and a polishing surface used for one polishing operation in which the first and second sandpapers come into contact with at least the processing surface. A delivery mechanism for delivering the material intermittently and quantitatively according to the length.

<Operation> Since the belt-shaped sandpaper 26 is stretched in a direction intersecting the feed direction of the work material 8 on the table 6, the sandpaper 26 is held by the pad 43 while being squeezed along the work material feed direction. The mechanism can be reciprocated, and the adhesion of the pad and the belt to the processed surface is improved. Further, since the above sandpaper 26 can be intermittently supplied in a fixed amount, the sandpaper 26 is frequently replaced with a new one (part), and a uniform polished surface can be obtained even if the whole or as compared with other processed materials.

<Embodiment> The embodiment of the present invention shown in the drawings will be described in detail below. A machine body 1 of a polishing apparatus is provided upright on a main body frame 2 having a drive device for feeding and the like and a rear end side of the main body frame 2. A table 6 having a post frame 3 and having a horizontal mounting surface 6a on the front end of the main body frame 2 and a left-right straight guide 4 projecting from the rear end in the left-right longitudinal direction. is set up. Inside the table 6, a feed roller 7 having a circumferential surface slightly protruding from the above-mentioned mounting surface 6a is axially supported in parallel in the front-rear direction. The rotation of the feeding roller 7 and the mounting surface 6a and the guide 4 The processed material 8 (see FIGS. 5 and 7) is linearly fed in the left-right direction by and.

An elevating slide device 9 is provided on the upper right side of the post frame 3.
The arm frame 11 is attached to the front of the arm frame 11 so as to be adjustable in the vertical position, and two upper and lower guide rods 12 are attached to the tip of the arm frame 11 in parallel to the left and right direction. Left and right sliders 13, 13 are supported on the guide rod 12 so as to be movable left and right,
Further, plate-like brackets 14 are provided on the respective sliders 13 so as to face each other in parallel and project toward the front side.

Thunder frame 16 is attached to the inner surface of each bracket 14 in the vertical direction,
It is pivotally attached by a lower mounting shaft 17 and is tiltably adjustable by an upper fixing screw 18. Reference numeral 19 denotes an arcuate adjustment hole through which the fixing screw 18 is inserted, which has an arc centered on the mounting shaft 17.

As shown in FIGS. 6 and 7, the sander frame 16 has a vertically long box shape, and a top roller 22 is rotatably supported in the left-right direction at its upper end via a bearing bracket 21. Further, a swing arm 23 is pivotally supported at the upper end so that the lower end is swingable on both lower front and rear sides of the sander frame 16, and a lower roller 25 is rotatable on the outer side of the tip of each swing arm 23 via a bearing 24. Is supported by. An endless belt-shaped sandpaper 26 (Note: the belt material is not limited to paper) is wound around the outer circumferences of the top roller 22 and the lower rollers 25, 25, and the lower end of each swing arm 23 is always outside. The sandpaper 26 is biased in the direction by a spring (not shown), and the tension of the sandpaper 26 is maintained by the opening / closing biasing force of the swing arm 23.

The outer end portion on the bearing bracket 21 is a mechanism that can adjust the vertical movement of the shaft 27 of the top roller 22 to adjust the movement of the sandpaper 26 to the left and right, and the adjustment screw 28 and the return spring 29. Is provided. Axis 27 with adjusting screw 28
The outer end of the is pushed and tilted downward, and when it is loosened, the spring 29 tilts upward.

A chain wheel 31 is concentrically mounted on the outer position of the top roller 22, and the chain wheel 31 rotates integrally with the top roller 22 only when the chain wheel 31 is rotated in a certain direction by a built-in ratchet (not shown). It is a mechanism that idles when rotating in the direction. As shown in FIGS. 4 and 6, a chain 32 is wound around the chain wheel 31, one end of the chain is attached to a rod of an air cylinder 33 attached to the outside of the sander frame 16, and the other end is attached. Each of them is connected to a free end of a pull-back spring 34 locked on the side of the sander frame 16. By reducing the cylinder 33, the top roller 22 is rotated by a certain angle, the sandpaper 26 is rotated by a certain amount, and when the cylinder 33 is released, the chain wheel 31 returns to the original position by the spring 34. The sandpaper 26 is intermittently and quantitatively sent out by the sending-out mechanism 35 configured as described above, and the old and new sandpaper is replaced in the pad 43 portion described later.

An air cylinder 36 is vertically accommodated and attached above the inside of the sander frame 16, and a pad pressing rod 39 is connected to a tip end of a cylinder rod 37 at a lower end of the air cylinder 36 via an escape mechanism 38 for releasing the stroke of the rod. Has been done. A cushion spring 42 is interposed between the spring receiver 41 attached to the cylinder rod 37 and the relief mechanism 38, and the pushing drive of the cylinder rod 37 is slid and released in the relief mechanism 38. Is transmitted to the pressing rod 39 via.

The tip of the pressing rod 39 is slidably protruded to the lower end of the sander frame 16, and the belt-shaped sandpaper 26 is provided at the tip between the lower rollers 25, 25 and the surface of the processed material 8 is processed.
A pad 43, which presses against 8a, is detachably attached. The pad 43 is made of elastic rubber or synthetic resin material, and is fixed to the pad base 44 by sticking or the like on the upper surface thereof, and the pad base 44 is attached to the pressing rod 39.

As shown in FIG. 1 and FIG. 2, the pad 43 has a shape of a block having a rectangular shape in plan view, with the left and right upper or lower corners cut off at the notches 46, and the left and right pads 43 are as shown in FIG. It has a symmetrical shape. This is to enable polishing up to the corners of the frame-shaped material 8 as shown in FIG.

The lower surface of the pad 43 is the surface shape of the processed material 8 (processed surface).
It has an uneven surface that matches the uneven surface of the work piece, and a cut 47 with a certain depth is formed in the front-back direction on the lower surface of the work piece. It has a structure that enhances performance.

As shown in FIG. 5, a motor 48 is installed in the arm frame 11.
And gears 61 and 62 of the same diameter that are driven to rotate by the motor 48 and mesh with each other. Crank mechanisms 63 and 63 are provided at the shaft ends of the gears 61 and 62, respectively. It is connected to the back of a slider 13 that moves left and right on the top 12. As a result, the motor 48 cranks 63,63.
Simultaneously reversely rotate, and the pair of sliders 13 and 13, that is, the signer frame 16 are slid back and forth in the left and right directions, and the pads 43 and 43 also return in the opposite directions accordingly.

In order to grind the processed material 8 with the above-mentioned device, the processed material 8 is placed on the table 6 in the left-right direction with the uneven processed surface facing upward, and the sandpaper 26 is placed on the processed surface with the two pads 43. The work piece 8 is pushed in close contact, the feed roller 7 is rotated and the work material 8 is fed leftward or rightward, and the pads 43, 43 are driven backwards by the motor 48 in the left and right directions, and the work surface is reciprocated by the pads 43, 43. Polish.

When the polishing performance of the sandpaper 26 deteriorates due to the above polishing, the air cylinder 33 is driven to send the sandpaper 26 a required length corresponding to the front-back width of the pads 43, 43,
Polish with new sandpaper again. During the polishing, the height of the pad 43 is raised and lowered by the slide device 9
The pressing force is adjusted and set by the cylinder 36, and the inclination of the pad 43 in the front-rear direction is adjusted and set by appropriately rocking the sander frame 16 around the mounting shaft 17 and tightening the fixing screw 18. It At this time, when the processed material 8 does not contact the feed guide 4, a straight auxiliary guide (not shown)
Can be fixed along the feed guide 4 or independently, or other mechanism can be used for adjusting the feed guide 4 back and forth.

<Effects of the Invention> Since the present invention is configured as described above, the direction of the loop of the belt-shaped side paper and the driving direction of the pad and sandpaper for polishing are different from those of the conventional one, so that the sandpaper is different. Since the driving force does not act on the machine, it has good compatibility and adhesion to the processing surface of the pad or sandpaper, and it has the advantage of being able to obtain a uniform and accurate finish regardless of the type of woodworking abrasive or polishing. is there.

In addition, since it is possible to intermittently supply a belt-shaped sandpaper from the lateral side of the material feeding direction, it becomes possible to grind with new sandpaper as necessary or at all times.
Uniform polishing performance can be obtained.

In addition, by moving the pad in small steps in the material feeding direction, the entire belt width can be used, which is economical.

[Brief description of drawings]

1 to 7 show one embodiment of the device of the present invention, FIG. 1 is an enlarged perspective view of a polishing portion of the device of the present invention, FIG. 2 is a plan view showing a polishing state of a processed material, and FIG. 5 is an overall front view, side view and plan view disclosing the inside of the polishing apparatus of the present invention. 6 and 7 are a front view and a side view of a main part showing the structure of the sander frame part, and FIGS. 8 and 9 are a front view and a side view of the main part showing the principle of a conventional polishing apparatus. 4: Table, 8: Processed material 8a: Processed surface, 26: Sandpaper 35: Feeding mechanism, 43: Putt

Claims (2)

[Claims] 1. A table on which a work material is placed and which feeds the work material in a fixed direction, and a belt which is stretched in a direction close to the same work surface of the work material and intersecting the feed direction of the work material. -Shaped first and second sandpaper, first and second pads for pressing the respective polishing surfaces of the first and second sandpaper against the processing surface under the action of an actuator, and the first and second pads And a driving mechanism for integrally reciprocating the above in the feed direction. 2. A table on which a work material is placed and which feeds the work material in a fixed direction, and a belt which is stretched in a direction close to the same work surface of the work material and intersecting the feed direction of the work material. -Shaped first and second sandpaper, first and second pads for pressing the respective polishing surfaces of the first and second sandpaper against the processing surface under the action of an actuator, and the first and second pads A drive mechanism for integrally reciprocating along the feed direction, and at least one of the first and second sandpapers in contact with the processing surface depending on the length of the polishing surface used in one polishing operation. A polishing device comprising: a delivery mechanism that delivers intermittently and quantitatively.