JP2001138192A - Sanding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sanding machine provided with a sanding wheel capable of absorbing the minute sliding of a work in the touching or separating direction and less prone to be abrade or deformed. SOLUTION: The sanding wheel 31 is integrally rotated with a polishing member 41 while it is concentrically kept with a turning member 32 by the elastic holding force of a rubber ring 53 (elastic holding means), and carries out polishing by slidably bringing the polishing surface 42 into contact with the polishing surface Wa to be polished of the work W. Since the polishing surface 42 is less prone to be abraded or deformed it is advantageous in view of maintenance and service life. When the work W is minutely slid in the touching or separating direction with regard to the sanding wheel 31, the polishing member 41 is displaced in the radial direction by the elastic displacement of the rubber ring 53 to absorb the minute sliding, so that a good polishing condition can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanding machine for polishing a work having a curved surface with a sanding wheel.

[0002]

2. Description of the Related Art As a means for polishing a work having a curved cross section, a sanding machine having a sanding wheel whose outer peripheral polishing surface is formed in the same shape as the curved surface of the work to be polished is used. At the time of polishing, the sanding wheel is driven to rotate, the work is transported in the vertical direction, and the polishing is performed by bringing the polishing surface of the sanding wheel into sliding contact with the curved surface of the work.

[0003]

As the sanding wheel, the outer peripheral polished surface is made of a grindstone having a high hardness, and a small piece of wood is mixed with a resin and an adhesive to form a cork-shaped outer peripheral polished surface. Things are known. The former sanding wheel is hard to wear because the polished surface is hard, but on the other hand, when the work causes slight floating in the approaching and separating directions with respect to the sanding wheel, it cannot absorb the fine floating, resulting in poor polishing. There is a fear. On the other hand, the latter sanding wheel has a disadvantage in that although the polishing surface is soft, it can absorb the slight movement of the work, but the abrasion and deformation are large and the shape easily collapses.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sanding machine having a sanding wheel which can absorb a slight loosening of a workpiece in a contacting / separating direction and is hardly worn or deformed. .

[0005]

According to a first aspect of the present invention, as a means for polishing a surface to be polished of a work, there is provided a sanding wheel whose outer peripheral polishing surface is formed in the same shape as the surface to be polished. In the above, the sanding wheel is a rotating member driven to rotate, a polishing member having an outer peripheral surface serving as the hard polishing surface, and the polishing member is elastically moved so as to be concentric with the rotating member. An elastic holding means for holding and allowing relative displacement of the polishing member in the radial direction with respect to the rotating member, and a connecting means for integrally connecting the polishing member to the rotating member so as to be integrally rotatable. Have been.

According to a second aspect of the present invention, in the first aspect, the object to be polished is a wooden work, wherein the polished surface is formed by electrodepositing diamond abrasive grains on a base metal. did. According to a third aspect of the present invention, in the first or second aspect of the present invention, the connecting means has a pin member fixed to the rotating member in parallel with the center of rotation, and the polishing member has a larger diameter than the pin member. The pin member is relatively displaced in the connection hole when the polishing member is displaced in the radial direction with respect to the rotating member.

[0007] The invention of claim 4 is the invention of claim 1 or claim 2.
In the invention, the elastic holding means comprises a rubber ring, and the concave or convex portion formed on the rotating member and the polishing member is engaged with the convex or concave portion formed on the rubber ring. Is configured. According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, a cleaning means capable of removing polishing debris attached to the polishing surface by bringing a brush into contact with the polishing surface is provided. And

[0008]

According to the first aspect of the present invention, the sanding wheel rotates integrally while the polishing member is kept concentric with the rotating member by the elastic holding force of the elastic means, and the polishing surface is covered with the workpiece. Polishing is performed by making sliding contact with the polishing surface. The polished surface is hard and hard to be worn and hardly deforms, which is advantageous in terms of maintenance and service life.
In addition, when the workpiece slightly moves in the direction of contacting and separating from the sanding wheel, the elastic means elastically displaces and the polishing member is displaced in the radial direction. State can be maintained.

[Invention of Claim 2] When the object to be polished is a wooden one, a hard polished surface is generally considered to be sufficient with a whetstone although a little wear occurs. Electrodeposited polished surfaces are not normally used. However, by intentionally using the polished surface of the electrodeposited diamond, the frequency of maintenance such as a periodic cutting process and replacement of the sanding wheel with the progress of wear is greatly reduced as compared with the case where a grindstone is used.

[0010] The polishing member may be displaced in the circumferential direction relative to the rotating member due to friction with the workpiece.
When the pin member comes into contact with the inner periphery of the connection hole, further relative displacement is regulated, and the polishing member can rotate integrally with the rotating member. [Invention of claim 4] Elastic holding means,
Since the rotating member and the polishing member also have a function as a connecting means, the number of parts can be reduced and the structure can be simplified as compared with a case where a dedicated connecting means made of a separate member is provided. Become.

[0011] [5] Since the polishing debris attached to the polishing surface is removed by the cleaning means, poor polishing caused by clogging of the polishing surface can be prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS. The sanding machine of the present embodiment includes a work W transport mechanism 10, a belt sanding mechanism 25, and a wheel sanding mechanism 30. still,
In the present embodiment, the left and right directions are based on FIGS. 2 and 3, and the width direction is such that the lower side of FIG.
The upper side is called the back side.

The sanding mechanisms 25, 30 of the present embodiment
The work W to be polished will be described. The work W is an elongated wood as a whole, and is conveyed along the length direction. The cross-sectional shape of the work W is constant along the length direction, and the cross-sectional shape is rectangular as a whole, and the upper edge on the right side (the depth side in the width direction) in the transport direction. The part has a non-planar shape, that is, a wavy shape. The portion of this waveform is the surface Wa to be polished, which is a component of the present invention, and is polished by a sanding wheel 31 described later.

[Transport Mechanism 10] First, the transport mechanism 10 will be described. In the base 11, there are provided a drive roll 13 that is driven to rotate by a motor (not shown), and a driven roll 14 that is rotatably supported at the same diameter and at the same height as the drive roll 13. , 14, a caterpillar (registered trademark) 15 formed by connecting a number of plates in an endless manner is wrapped around the conveyer 12. The transport unit 15A that travels horizontally above the caterpillar 15 is exposed between the carry-in table 16 at the right end of the upper surface of the base 11 and the carry-out table 17 at the left end, and the elongated work W placed on the transport unit 15A is It is transported vertically from right to left.

On the upper surface of the base 11, three guide rails 18 parallel to the conveying direction (left-right direction) by the conveyor 12 are provided.
A, 18B, and 18C are linearly arranged along the edge on the back side of the transport unit 15A, and are provided at intervals in the longitudinal direction.
Are guided in a state in which play in the width direction is restricted while sliding on the guide rails 18A, 18B, 18C. In the gaps 19A, 19B between the three guide rails 18A, 18B, 18C, the upstream side in the transport direction (FIG. 2).
The sanding wheel 31 is disposed in the gap 19A (on the right side in FIG. 3) and the gap 19B on the downstream side in the transport direction.
Is provided with a sanding belt 27.

A pressing mechanism 2 is provided above the conveyor 12 for restricting the workpiece W from moving upward and forward.
0 is provided. The pressing mechanism 20 has a configuration in which a pair of left and right rollers 22 is disposed on a supporting member 21 that is driven up and down, and an endless belt 23 is wound around the two rollers 22. Inside the belt 23, a plurality of press rolls 24 are arranged in parallel to regulate the upward movement of a press section 23A that runs horizontally below the conveyor section 15A (on the side opposite to the transport section 15A of the conveyor 12). Such a holding mechanism 20
The height is adjusted according to the thickness of the work W, and the belt 23 follows the work W by friction with the work W by contacting the upper surface of the work W conveyed by the conveyor 12. While the work W is being conveyed, the pressing mechanism 23A of the pressing mechanism 20 presses the work W from above so that the work W is moved upward and in the width direction (on the guide rails 18A, 18A).
B, 18C).

[Belt Sanding Mechanism 25] The belt sanding mechanism 25 is disposed on the back side in the width direction with respect to the conveyor 12, and has a plurality of rolls 26 whose axes are directed vertically.
And an endless sanding belt 27 is wrapped around. A part of the sanding belt 27 faces the gap 19B on the downstream side in the transport direction of the guide rails 18A, 18B, and 18C, and a part of the sanding belt 27 is pressed toward the near side by the treading pad 28 while circulating. Accordingly, the rear side surface Wb of the work W is polished at a predetermined contact pressure.

[Wheel Sanding Mechanism 30] The wheel sanding mechanism 30 includes guide rails 18A, 18
B, 18C, a sanding wheel 31 facing the gap 19A on the upstream side in the transport direction, and the sanding wheel 31
And a drive mechanism for driving the rotation. The axis of the sanding wheel 31 is perpendicular to the conveying direction of the workpiece W and oblique to the horizontal direction.
Corresponds to the polished surface Wa at the upper edge of the workpiece W at the back in the width direction.

The sanding wheel 31 has an annular rotating member 32 made of metal, an abrasive member 41 having the same annular shape as the rotating member 32, and a member for holding the abrasive member 41 concentrically with the rotating member 32. Rubber ring 5
3 (elastic holding means which is a constituent element of the present invention), and connecting means for rotating the polishing member 41 integrally with the rotating member 32. The rotating member 32 includes a rotating ring 33 and a pair of mounting plates 34 coaxially fixed to the rotating ring 33 so as to sandwich the rotating ring 33 in the axial direction. On the obliquely upward surface of the rotating ring 33, the first mounting portion 33A whose outer peripheral edge portion is thinned in a step shape, and the outer peripheral side of the first mounting portion 33A and the first mounting portion 33A. Further, a second attachment portion 33B that is thinned like a step is formed.

The mounting plate 34 is mounted concentrically with respect to the driven shaft 35 and so as to rotate integrally with a key (not shown). The driven shaft 35 is rotatably supported by a bearing member 36, and the bearing member 36 is fixed to a mounting base (not shown) fixed above the base 11. In addition, a motor 37 is mounted on the mounting base.
A is fixed in an oblique posture with A directed parallel to the driven shaft 35, and a drive sprocket 38 is fixed to the output shaft 37A. The driving sprocket 38 and the driven shaft 3
An endless timing belt 40 is stretched between the driven sprocket 39 and the driven sprocket 5, and the rotating member 32 of the sanding wheel 31 is driven to rotate by the driving of the motor 37.

The polishing member 41 is made of a metal material and has an annular shape, and its outer peripheral surface is a polishing surface 42 formed by electrodepositing diamond abrasive grains (not shown). The polished surface 42 is formed in the same shape (waveform) as the polished surface Wa of the work W.
Is contacted uniformly. Polishing member 4
The portion on the inner peripheral side of 1 is an attached portion 41A which is made thin by notching both sides in steps. The attached portion 41 </ b> A is a second attachment portion 33 of the rotating ring 33.
A relatively thin annular holding plate 43 is tightly adhered to B in the axial direction from obliquely above, and further on the upper surface of the attached portion 41A and the first attaching portion 33A. The second mounting portion 33B, the mounted portion 41A, and the holding plate 43 respectively include:
The through-hole 44, the connecting hole 45 (the connecting means which is a component of the present invention) and the through-hole 46 are formed coaxially, and the fixing pin 47 (see FIG. A pin member that is a constituent element of the present invention,
The connecting means is penetrated from below, and a fixing bolt 48 is screwed to the upper end surface of the fixing pin 47 via a washer 49. As a result, the rotating ring 33, the polishing member 41, and the pressing plate 43 are fixed so that they cannot move and separate in the axial direction. Further, the first mounting portion 33A and the holding plate 43 are integrally fixed by another fixing bolt 50. The fixing by the fixing pins 47 and the fixing bolts 48 is performed at two places at 180 ° intervals in the circumferential direction.

In the connecting hole 45, a cylindrical spacer 51 is interposed between the second mounting portion 33B and the pressing plate 43, whereby the mounted portion 41A and the second mounting portion 3 are provided.
A slight gap is provided between 3B and the holding plate 43 to allow relative displacement of the mounted portion 41A in the radial direction. This gap is not so large as to cause the attached portion 41A to rattle in the axial direction. Also, this spacer 51
Is set smaller than the inner diameter of the connection hole 45. Further, the inner diameter of the mounted portion 41A is the first mounting portion 33.
It is set to be larger than the outer diameter of the step peripheral surface 33C between A and the second mounting portion 33B. With such a dimension setting, the polishing member 41 can be displaced in the radial direction relatively to the rotating member 32.

Further, the outer peripheral surface of the second mounting portion 33B and the back inner peripheral surface 41 of the polishing member 41 opposite to the polishing surface 42 are provided.
B, the outer peripheral surface of the holding plate 43 and the inner peripheral surface 41 on the back side.
A rubber ring 53 (elastic holding means, which is a component of the present invention) is interposed between B and B. The rubber ring 53 is formed in an annular shape.
Numeral 3 is fixed to the outer peripheral surface of the second mounting portion 33B by adhesion in advance, and the other rubber ring 53 is fixed to the outer peripheral surface of the holding plate 43 by adhesion in advance. The outer diameter of the rubber ring 53 before assembly is set to be larger than the inner diameter of the back inner peripheral surface 41B. Therefore, in the assembled state, the rubber ring 53 is elastically bent in the radial direction,
The amount of elastic deformation is uniform over the entire circumference. Thereby, the polishing member 41 always keeps the rotating member 32
Are held concentrically with respect to

[Cleaning Means] A rotary brush 55 and an air nozzle 56 as cleaning means are provided on a side of the sanding wheel 31 substantially opposite to the work W.
The rotary brush 55 has a brush 55B that protrudes radially outward (radially) on the outer periphery of a rotary shaft 55A, and is rotatably driven by a motor (not shown) as a drive source. Also, an air cylinder etc. (not shown)
By the operation described above, the actuator is driven and moved in the radial direction between a position in contact with the polishing surface 42 and a position away from the polishing surface 42.

The air nozzle 56 is provided with a rotating brush 55
And is connected to a pressurized air pressure source (not shown) so as to blow high-pressure air toward the polishing surface 42 in a direction oblique to the radial direction. . [Operation and Effect of Embodiment] When the work W is polished, the work W is transported by the conveyor 12 and the sanding wheel 31 is driven by the motor 37.
To rotate. At this time, the polishing member 41 is kept concentric with the rotating member 32 by the elastic holding force of the rubber ring 53. Further, even if the polishing member 41 is relatively displaced in the circumferential direction with respect to the rotating member 32 due to a dimensional difference (gap) between the connection hole 45 and the spacer 51, the outer periphery of the spacer 51 abuts the inner periphery of the connection hole. Since the relative displacement is further restricted, the polishing member 41 rotates integrally with the rotating member 32.

In this manner, the polishing is performed by the polishing surface 42 of the rotating sanding wheel 31 contacting the surface Wa to be polished of the work W. The polished surface 42 is hard, hardly worn, and hardly deformed because the diamond abrasive grains are electrodeposited. Therefore, it is advantageous in terms of maintenance and service life. Further, when the workpiece W slightly moves in the direction (radial direction) of contacting and separating from the sanding wheel 31, the polishing member 41 is relatively displaced in the radial direction with respect to the rotating member 32 while elastically deforming the rubber ring 53. As a result, the slight movement is absorbed. Thereby, there is no possibility that the contact pressure abnormally increases, and a favorable polishing state can be maintained.

When the object to be polished is a wooden object, the hard polished surface 42 is generally considered to be sufficient with a grindstone, though slightly abrasion occurs. The polishing surface 42 as in the present embodiment is not usually used. However, the intentional use of the polished surface 42 of the electrodeposited diamond significantly reduces the frequency of maintenance such as the periodic cutting process and replacement of the sanding wheel 31 with the progress of wear, as compared with the case where a grindstone is used. You.

The polishing debris adhering to the polishing surface 42 is removed so as to be scraped off when the rotating brush 55 comes into contact with the polishing surface 42, and is blown off by blowing high-pressure air from the air nozzle 56. Is removed. The high-pressure air from the air nozzle 56 also removes polishing debris attached to the rotating brush 55. By performing such cleaning regularly or constantly, it is possible to avoid clogging of the polishing surface 42 and perform good polishing.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment,
The connecting means between the rotating member 60 and the polishing member 61 has a different configuration from that of the first embodiment. The other configuration is the same as that of the first embodiment, and therefore, the description of the structure, operation, and effect of the same configuration will be omitted. In the first embodiment, the fixing pin 47 that penetrates the second mounting portion 33B of the rotating member 32 and the through holes 44 and 46 formed in the pressing plate 43 is used as the connecting means. However, in the connecting means of the second embodiment, The through hole 62 is provided in the second mounting portion 6 of the rotating member 60.
0B, and no through holes are formed in the holding plate 63. The fixing pin 64 (a pin member, which is a component of the present invention) is press-fitted into the second mounting portion 60B and the polishing member 61 is pressed.
In the connection hole 65. The outer diameter of the fixing pin 64 is set smaller than the inner diameter of the connection hole 65.

In the second embodiment, the number of components is smaller than that of the first embodiment because a fixing bolt screwed to the fixing pin 64 is unnecessary. Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment as well, the rotating member 7
The connecting means for connecting the polishing member 71 to the polishing member 71 is different from that of the first embodiment. The other configuration is the same as that of the first embodiment, and therefore, the description of the structure, operation, and effect of the same configuration will be omitted.

In the third embodiment, rectangular convex portions 73 and 74 are formed on both the outer periphery and the inner periphery of a rubber ring 72 (elastic holding means which is a constituent element of the present invention). Concave portions 75, 76 are formed on both the peripheral surface 71B and the outer peripheral surface of the rotating member 70, and the polishing members 71 are integrally rotated with the rotating member 70 by fitting these convex portions 73, 74 and the concave portions 75, 76. I try to make it. In the fourth embodiment, since the rubber ring 72, the rotating member 70, and the polishing member 71 also have a function as a connecting means, the number of parts is smaller than when a dedicated connecting means made of a separate member is provided. The structure can be simplified and the structure can be simplified.

[Other Embodiments] The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the above embodiment, the polished surface is one in which diamond abrasive grains are electrodeposited. However, according to the present invention, the polished surface can be made of a material having relatively high hardness such as a grindstone.

(2) In the above embodiment, the elastic holding means is made of rubber. However, according to the present invention, a resin ring or a metal spring can be used as the elastic holding means. (3) In the above-described embodiment, the connection hole and the pin member constituting the connection means are provided at two places at 180 ° intervals. However, according to the present invention, three or more places may be provided. (4) In the above embodiment, the elastic holding means is exposed on the outer surface of the sanding wheel. However, according to the present invention, the elastic holding means may be provided so as to be hidden inside the sanding wheel.

(5) In the above embodiment, the convex portion of the rubber ring is fitted to the concave portion of the rotating member and the polishing member as the connecting means. However, according to the present invention, the convex portion and the concave portion of these members are fitted. As a combination of the fitting, for example, a convex portion and a concave portion may be formed on a rubber ring, a concave portion may be formed on one of a rotating member and a polishing member, and the other convex portion may be formed on the rubber ring. A concave portion may be formed, and a convex portion may be formed on both the rotating member and the polishing member.

(6) In the above embodiment, the projections and depressions constituting the connecting means are formed on the peripheral surfaces of the rubber ring, the rotating member and the polishing member. However, according to the present invention, the end surface (perpendicular to the rotation center axis). Surface). (7) In the above embodiment, both the rotating brush and the air nozzle are provided as the cleaning means. However, according to the present invention, the cleaning may be performed using only one of the rotating brush and the air nozzle. (8) The cleaning means in the above-described embodiment is not limited to the rotating brush and the air nozzle, and may remove polishing debris by contacting the adhesive surface.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing two sanding mechanisms according to a first embodiment.

FIG. 2 is a front view

FIG. 3 is a plan view

FIG. 4 is a right side view of the wheel sanding mechanism.

FIG. 5 is a partially enlarged sectional view of the sanding wheel.

FIG. 6 is a front view of a polishing member of the sanding wheel.

FIG. 7 is a partial cross-sectional view showing a connecting means according to the second embodiment.

FIG. 8 is a partial front view showing a connecting means of the third embodiment.

[Explanation of symbols]

 W: Work Wa: Polished surface 31: Sanding wheel 32: Rotating member 41: Polishing member 42: Polishing surface 45: Connection hole 47: Fixing pin (pin member) 53: Rubber ring (elastic holding means) 55: Rotating brush ( Cleaning means) 60, 70 Rotating member 61, 71 Polishing member 64 Fixing pin (pin member) 65 Connection hole 72 Rubber ring (elastic holding means) 73, 74 Protrusion (connection means) 75, 76 Recess (connection means)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B24D 3/06 B24D 3/06 B 5/00 5/00 P 5/16 5/16

Claims (5)

[Claims] 1. A means for polishing a surface to be polished of a work, comprising a sanding wheel whose outer peripheral polishing surface is formed in the same shape as the surface to be polished, wherein the sanding wheel is driven to rotate. A rotating member, a polishing member having a hard outer peripheral surface serving as the polishing surface, and a polishing member elastically held so as to be concentric with the rotating member, and the polishing member with respect to the rotating member. A sanding machine comprising: elastic holding means for enabling relative displacement in the radial direction; and connecting means for connecting the polishing member to the rotating member so as to be integrally rotatable. 2. A sanding machine according to claim 1, wherein the object to be polished is a wooden work, wherein said polished surface is formed by electrodepositing diamond abrasive grains on a base metal. . 3. The connecting means comprises a pin member fixed to the rotating member in parallel with the center of rotation of the rotating member, and a connecting hole formed in the polishing member with a diameter larger than that of the pin member. The sanding machine according to claim 1, wherein the pin member is relatively displaced within the connection hole when displaced in the radial direction with respect to the rotating member. 4. The connection by engaging the elastic holding means with a rubber ring and engaging a concave or convex portion formed on the rotating member and the polishing member with a convex or concave portion formed on the rubber ring. The sanding machine according to claim 1 or 2, wherein a means is configured. 5. The cleaning device according to claim 1, further comprising a cleaning unit that removes polishing debris attached to the polishing surface by bringing a brush into contact with the polishing surface. Sanding machine.