JPH0735010B2 - Belt sander machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a belt sander machine for grinding and polishing a wood surface.

<Prior Art> A grinding device provided with a treading pad arranged on the material feeding passage side and a belt guide mechanism configured by a plurality of rollers including guide rollers arranged on both sides of the treading pad. A belt sander machine provided opposite to the above is known.

<Problems to be Solved by the Invention> In the conventional configuration, as shown in FIG.
Looking at the tension state of the endless sanding belt c between a and b, since the belt c is wide and the distance between the lower edges of the guide rollers a and b is long, the tensile force is unevenly distributed in the width direction. It is usual to generate waviness x in the width direction. Moreover, since the treading pad d is made of an elastic body, this waviness x is not directly corrected but comes into direct pressure contact with the processed material.

And for this reason, the surface of the processed material is not uniformly pressed,
Vertical stripe-shaped uneven polishing occurs. This unevenness is remarkable in the case of final finishing polishing such as coating polishing and causes deterioration of the finishing quality.

On the other hand, as a means to solve this problem,
As disclosed in JP-A-47-33956 and JP-A-56-119363, the running direction of the endless sanding belt is inclined with respect to the running direction of the processed material so that the direction perpendicular to the feeding direction of the processed material ( There is one in which a polishing direction component (left-right direction) is applied to remove polishing unevenness.

However, this method has a drawback that the width of the sanding belt needs to be widened and the sanding apparatus also becomes large.

An object of the present invention is to provide a belt sander machine capable of preventing uneven polishing without the above-mentioned drawbacks.

<Means for Solving the Problems> The present invention comprises an endless sanding belt configured by a treading pad arranged on the material feeding passage side and a plurality of rollers including guide rollers arranged on both sides of the treading pad. A belt grinding device having a belt guide mechanism to be passed,
In a belt sander machine in which a material feeding device formed by hanging a material feeding belt on a material feeding roller supported in front of and behind the material feeding frame is vertically opposed, the material feeding frame is provided via a guide rail in the left-right direction. A left-right reciprocating drive mechanism that supports the loading table, mounts a drive motor on the loading table, and converts the rotation of the drive shaft of the driving motor into the left-right reciprocal displacement of the material feeding frame is used as the loading table. A belt sander machine, characterized in that it is interposed between a material feeding frame and the material feeding frame is continuously reciprocated right and left along a guide rail by driving of the drive motor.

<Operation> By driving the drive motor, the material feeding device is reciprocated in the direction (left-right direction) orthogonal to the material feeding direction. Along with this, the processed material is ground and polished while moving forward and backward with respect to the endless sanding belt while moving left and right. For this reason, even when the sanding belt undulations x occur between the guide rollers, the work material is flattened by the lateral movement of the work material.

<Embodiment> An embodiment of the present invention will be described with reference to FIGS.

Elevating screws 3,3 that are interlocked with a motor M ₁ attached to the lower surface of the loading table 4 are inserted into the base portion 1a of the body frame 1, and the loading table 4 is supported by the screws 3,3 so as to be able to move up and down. Has been done. As shown in FIG. 1, the loading table 4 has a U-shaped cross section with a rising portion formed on the front and rear sides, and a dovetail-shaped guide rail 5 is formed on the rising portion. Then, on the guide rail 5, the material feeding frame 9 of the material feeding device 8 is mounted on and supported by the dovetail-shaped guide groove formed on the lower surface of the guide rail 5 so as to be movable in the left-right direction. There is.

The Okuzai device 8 includes a drive roller 10a that is supported by the front and rear Okuzai frame 9, made spanned the Okuzai belt 11 to the driven roller 10b, and the driving roller 10a in tandem with a continuously variable transmission with Okuzai motor M ₂ The feeding belt 11 is running.

A mounting cylinder is formed in the center of the loading table 4, and a drive motor M ₃ for left and right reciprocating motion is fitted to the cylinder, and its drive shaft is projected upward so that the eccentric shaft 13 is upward. Rotating plate 14
Is fitted. Further, a linking shaft 15 is vertically provided at the central position on the lower surface of the material feeding frame 9, and the eccentric shaft 13 and the linking shaft 15 are provided.
The ends of the links 16 are pivotally supported respectively, and thereby a left-right reciprocating drive mechanism is constituted.

In such a configuration, when the drive motor M ₃ is driven, the rotary plate 14 rotates, and the link 16 moves back and forth with a stroke twice the eccentric amount of the eccentric shaft 13, whereby the material feeding device 8 is moved by the guide rail 5 It will reciprocate on the left and right.

Next, the belt grinding device 20 that is opposed to the material feeding device 8 will be described.

A vertical frame formed in a gate shape on the base 1a of the main body frame 1.
A sanding frame 19 supporting a belt grinding device 20 is fixed on the material feeding device 8 at 1b.

On the mounting frame 21 of the belt grinding device 20, drive guide rollers 22a and 22b are pivotally supported by bearings on the supply side and the discharge side, respectively, and each shaft end is connected to a drive motor (not shown) by a belt. However, the turning power of the drive motor is applied to the guide rollers 22a and 22b.

A pad frame 18 is suspended between the guide rollers 22a and 22b of the mounting frame 21, and a tread pad device 20 including a tread pad 23 is fitted to the fitting portion of the pad frame 18. The tread pad
When the processed material is immediately below, 23, the lower surface of the pad is extruded downward, and an endless sanding belt 41 described later is pressed against the upper surface of the processed material.

A support cylinder 25 is erected on the upper surface of the mounting frame 21, and a central shaft 2828 of a steering frame 27 that supports a steering roller 26 in a freely rotatable manner is inserted into the support cylinder 25. The steering roller
The tension cylinder 26 is biased upward by a tension cylinder (not shown) and swings about a central axis 28.

In such a configuration, the endless sanding belt 29 is stretched over the belt guide mechanism including the guide rollers 22a and 22b and the steering roller 26, and the processed material supplied to the material feeding passage by the stepping pad device 20. Then, the abrasive grain surface is pressed.

At this time, the endless sanding belt 29 is
Since the distance between the lower edges of 22a and 22b is long, the tensile force is unevenly distributed in the width direction, and waviness x occurs in the width direction. However,
In the present invention, the material feeding device 8 is driven by the reciprocating driving device and continuously reciprocates in the left-right direction orthogonal to the material feeding direction. And with this, endless sanding belt
29 is flattened in the width direction by the left and right reciprocating movement of the processed material. Therefore, uneven polishing of the processed material can be prevented, and a good polished surface can be achieved.

On the other hand, pressure rollers 30a and 30b, which are urged by a bullet 31 in the pressing direction, are disposed in front of and behind the grinding device 20. By the way, the pressure rollers 30a and 30b are used for the material feeding device 8
Since it moves in the left-right direction, as is conventionally known, if it remains fixed, friction in the width direction occurs between the work material and the pressing rollers 30a and 30b, which hinders the travel of the work material. Therefore, as described below, the pressing rollers 30a and 30b are adapted to follow the movement of the material feeding device 8.

1 and 2 show a spline shaft 32 projecting from both ends of the pressing rollers 30a and 30b, the spline shaft 32 is supported slidably by a spline bearing 33, and the spline bearing 33 is mounted on an ammunition 31. Supported by the vertical frame 1b through the
It is designed to be urged downward by.

Further, FIGS. 3 and 4 show that the support shaft 40 is projected from both ends of the pressing rollers 30a and 30b, and is provided between a pair of upper and lower shaft guide rolls 42 and 42 provided in a sliding housing 41 that is urged downward by a bullet 31. , Insert the spindle 40,
By the free rotation of the shaft guide rolls 42, 42, the pressing rollers 30a, 30b
Is designed to move left and right.

In the configurations shown in FIGS. 1, 2 and 3, 4, the pressing rollers 30a, 30b are elastically contacted to the upper surface of the processed material by the ammunition machine 31, so that the lateral movement of the material feeding device 8 is followed by friction resistance. By doing so, the lateral wear between the upper surface of the processed material and the pressing rollers 30a, 30b is prevented.

5, 6 and 7 show the pressure rollers 30a and 30b connected to the material feeding frame 9. That is, four screw cylinders 50 are arranged in a rectangular shape on the side portion of the material feeding frame 9, screw rods 51 are screwed into each screw cylinder 50, and the upper end portion of each screw rod 51 has a bearing portion. Support 52. Further, as shown in FIG. 7, a bevel gear 53 is fixed to the upper end of the screw rod 51 on the bearing portion 52, and the left and right bearing portions 5 are
The bevel gear 55 of the connecting rod 54 passed over the upper part of the 2,52 is meshed with the bevel gear 53 so that the left and right screw rods 51,51 are interlocked, and the front and rear screw rods 51,51 are A drive rod 56 meshing with the gear 53 can be rotated by a drive motor M ₄ . Therefore,
The four screw rods 51 are interlocked and simultaneously moved up and down by the screw feeding action of the screw cylinder 50, whereby the height positions of the pressure rollers 30a and 30b can be adjusted.

Inside the bearing portion 52, a fitting hole 56 through which both end shafts of the pressing rollers 30a and 30b are inserted is formed, and a spring 57 in the fitting hole 56 is configured to urge the pressing rollers 30a and 30b downward. I have to. In such a configuration, since the pressing rollers 30a and 30b are interlocked with the material feeding device 8 not by friction with the processed material, there is no frictional movement associated with the reciprocal movement with the processed material. Becomes Also, the elevation adjustment can be optionally performed.

<Effects of the Invention> As has been made clear in the above description, according to the present invention, the feeding device is configured to reciprocate in the left-right direction. As a result, uneven polishing of the surface of the processed material is removed, and the processed material can be ground uniformly and beautifully.
Further, unlike the conventional structure in which the endless sanding belt is run while being inclined, there is an excellent effect that the width of the belt is not widened and the device is not enlarged.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an example of a belt sander to which the present invention is applied, FIG. 2 is a cutaway front view of the same portion, and FIG. 3 is a second embodiment of a rotating mechanism of pressing rollers 30a and 30b. FIG. 4 is a partially cutaway side view of the part shown in FIG.
FIG. 6 is a partial cutaway side view showing a third embodiment of the rotating mechanism of the pressure rollers 30a, 30b, FIG. 6 is a cutaway front view of the same portion, and FIG. 7 is a plan view thereof. FIG. 8 is a perspective view of an endless sanding belt showing the problems of the conventional structure. 3,3 ...... Lifting screw 4 ...... Loading platform 5 ...... Guide rail 8 ...... Feeding device 9 ...... Feeding frame 10a, 10b ...... Roller 13 ...... Eccentric shaft 14 ...... Rotating plate 15 ...... Linkage Shaft 16 …… Link 20 …… Grinding machine 29 …… Endless sanding belt 30a, 30b …… Pressing roller 32 …… Spline shaft 42,42 …… Axis guide roll 51 …… Screw rod M ₃ …… Drive motor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Hitoshi Kawakita, 1-1, Minamihamadori, Mizuho-ku, Nagoya, Aichi Prefecture Takekawa Iron Works Co., Ltd. (56) Reference JP 62-84966 (JP, A) JP Sho 60 -90663 (JP, A)

Claims (1)

[Claims] 1. A tread pressure pad disposed on the side of the material feeding passage, and a belt guide mechanism configured by a plurality of rollers including guide rollers arranged on both sides of the tread pressure pad and around which an endless sanding belt is stretched. In a belt sander machine in which a belt grinding device and a material feeding device formed by suspending a material feeding belt around material feeding rollers supported in front of and behind the material feeding frame are vertically opposed, Left and right reciprocating drive that supports the mounting table via the guide rails and mounts a drive motor on the mounting table, and converts the rotation of the drive shaft of the drive motor to the left and right reciprocating displacement of the material feeding frame. A belt sander machine characterized in that a mechanism is interposed between a mounting table and a material feeding frame, and the material feeding frame is continuously reciprocated right and left along a guide rail by driving of the drive motor.