JPH071314A - Belt sanding machine - Google Patents

Abstract

PURPOSE:To grind the required part of the cross section of a material to be worked under good condition to prevent a corner defect by joining an endless grinding belt to the circumferential surface of an endless rubber belt to form a belt running band which is run in an integrated manner, and by bringing the belt running band in pressure-contact with the work material to be worked and thereby machining the material to be worked. CONSTITUTION:An endless grinding belt 32 is joined to the circumferential surface of an endless rubber belt 31 to form a belt running band 30. The endless rubber belt 31 is formed of a rubber ring having the cross section of trapezoid shape, for example, and an engagement cloth surface 33 is adhered to the outer peripheral surface. The outer peripheral surface of the endless grinding belt 32 is an abrasive grain surface 35, and a cloth surface 34 to be engaged is adhered to the inner circumferential surface. The engagement cloth surface 33 is engaged with cloth surface 34 to be engaged, to join the endless rubber belt 31 to the endless grinding belt 32. The belt running band 30 is brought in pressure contact with a work material (w) to be worked, and the material (w) to be worked is processed by the abrasive granular surface 35. Since the required cross section (f) of the material (w) to be worked can be ground under good condition without generating a end sagging of the belt running band 32 due to the holding force of the endless rubber belt 31, a corner defect can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt sander machine equipped with an endless grinding belt most suitable for partial grinding of work materials having various shapes.

[0002]

As shown in FIG. 6, when a deformed workpiece w having a step or an inclined surface is to be ground, it is necessary to sequentially grind each surface. By the way, when the endless sanding belt B is applied to the required step surface f and is ground as in the conventional case, the portion of the belt protruding outside from the required step surface f hangs down, and the outer corner edge x of the processed material w is scraped off. However, good grinding could not be performed. Instead of this, there is a means of brush polishing, but the amount of grinding is small,
There is a problem that the processing time becomes long. Further, in order to prevent the corner of the processed material w from falling, there is a means by grinding with a grindstone, but in this case, if there is an inner corner edge y shown in FIG. Processing of this part becomes impossible.

An object of the present invention is to provide a belt sander machine which can favorably grind a required step surface f without causing a corner drop of a processed material w.

[0004]

SUMMARY OF THE INVENTION The present invention comprises an endless rubber belt that is hung and run by a belt drive mechanism, and an endless grinding belt that has an abrasive grain surface formed on the outer peripheral surface of the endless rubber belt. One of the locking face cloth having a mushroom-shaped hook or a hook-shaped locking protrusion and the non-locking face cloth having an infinite number of group threads locked by the locking protrusion It is equipped with a belt running belt that is attached to the outer peripheral surface and one of the other is attached to the inner surface of the endless grinding belt, and the endless grinding belt is joined to the peripheral surface of the endless rubber belt so that the belt travels integrally. It is characterized in that the band is pressed against the processed material.

[0005]

Since the endless grinding belt is joined to the peripheral surface of the endless rubber belt so as to run integrally, the endless rubber belt has a thick shape and an appropriate shape-retaining force is generated. There is no possibility that the processed material w drips at the end and is scraped off.

[0006]

EXAMPLE An outline of a belt sander machine of the present invention is shown in FIGS.
Will be explained.

The material feeding device S is provided with a material feeding driving roll 2 and a material feeding driven roll 3 which can be driven by a motor 5 with a speed reducer, and an endless material feeding caterpillar belt 4 is stretched over the rolls 2 and 3. And is supported by the lower frame 1.

A main pillar frame 1 is provided above the material feeding device S.
1 and 11 are provided to support the material feeding pressure device T, and a lifting screw 14 disposed at the upper ends of the main pillar frames 11 and 11.
With the lifting handle 13, the feeding material treading device T can be raised and lowered freely. The material feeding stepping device T is connected to the main pillar frame 11 via the lifting screw 14, and inside the stepping frame 6 which is an outer frame thereof, rotatable follower rolls 7, 7 are provided.
An endless pressure-feeding belt 8 is laid over the belt, and a plurality of pressure-feeding rolls 1 are provided on the inner surface of the belt 8 on the side of the feeding path via an elastic body 9.
0 is provided. With this configuration, by adjusting the height position of the material feeding stepping device T according to the shape of the processed material w, the processed material w can freely travel.

On the side of the traveling path of the processed material w, the grinding device 1 is provided.
7 are arranged as shown in FIG. The grinding frame 22 of the grinding device 17 is provided with a drive pulley 19 that can be driven by the grinding drive motor 18, a driven pulley 20 and a driven tension pulley 21 that are provided on the material feeding passage side. The pulleys 19, 20 and 21 constitute a belt drive mechanism, and the pulleys 19 and 2 are
A belt traveling belt 30 according to the main part of the present invention is bridged over 0 and 21, and a support guide 37 to which the belt traveling belt 30 is fitted is disposed on the inner surface of the material feeding passage side.

The width and height of the grinding device 17 as well as the inclination angle can be freely adjusted. That is, the support base 25
Is vertically movably fitted to a vertical guide 24 provided on a side surface of the lower frame 1, and a dovetail-shaped width guide 26 is further provided on an upper surface of the support base 25.
Mount 7. Then, the grinding frame 22 of the grinding device 17 and the working table 27 are linked by a shaft 28, and the grinding device 17
Is supported so as to be tiltable about a shaft 28. Further, the operating table 27 can be moved and adjusted in the width direction along the width direction guide 26 by rotating the handle 29a of the feed screw 29 which is extended in the width direction.

Next, the structure of the belt running zone 30 will be described with reference to FIG.

The belt running zone 30 is constructed by joining an endless grinding belt 32 to the peripheral surface of an endless rubber belt 31 and integrating them. That is, the endless rubber belt 31 is made of a rubber ring having a trapezoidal cross section, and a locking face cloth (so-called magic tape) 33 having a number of mushroom-shaped or hook-shaped locking protrusions is attached to the outer peripheral surface thereof. ing. The endless rubber belt 31 is made of rubber so as to generate elasticity so that it can flexibly cope with the circumferential length of the endless grinding belt 32.

On the other hand, the endless grinding belt 32 has an outer peripheral surface as an abrasive grain surface 35, and further has an engaging surface cloth 33 on the inner surface.
A non-locking face cloth (so-called magic tape) 34 having an infinite number of group yarns that lock with the locking projections is attached. The circumference of the endless grinding belt 32 is the same as the endless rubber belt 31.
Is equal to the outer peripheral length of. As a matter of course, as the outer peripheral surface of the endless rubber belt 31 and the inner peripheral surface of the endless grinding belt 32, one of the locking surface cloth 33 and the non-locking surface cloth 34 can be selectively adopted.

Then, the endless grinding belt 32 is fitted onto the endless rubber belt 31, and the engaging surface cloth 33 and the non-engaging surface cloth 34 are attached.
The belt running zone 30 is formed by joining and.

The support guide 37 on which the belt running belt 30 is fitted is formed with a trapezoidal guide groove 38 opened outward so that the endless rubber belt 31 is fitted. Then, with the belt running belt 30 fitted in the trapezoidal guide groove 38,
There is a slight gap inside.

In such a structure, the endless grinding belt 32 of the belt running belt 30 is adjusted by adjusting the width, height and inclination angle of the grinding device 17 by rotating the handle 29a.
The running surface of is matched with the position of the required grinding surface of the processed material w.

Then, the left and right moving handle 16 and the lifting handle 13 are rotated to adjust the gap of the material feeding passage 12,
The processed material w is inserted and sent. As a result, the required step surface f of the processed material w is brought into pressure contact with the abrasive grain surface 35 of the belt running zone 30 to perform the grinding.

In such a structure, the endless grinding belt 32
Is carried by the endless rubber belt 31 and becomes thick. Therefore, even if the end surface of the processed material w deviates from the required polishing surface as shown in FIG. The outer corner edge x of w does not fall off. In addition, if only the end portion of the endless rubber belt 31 is hardened, the above-mentioned sagging prevention can be more sufficiently achieved. Also, the required step surface f
Even if there is an inner corner edge y occurring in the inner part of the belt, by making the belt running belt 30 have a trapezoidal cross section like a V-belt, the edge of the belt running belt 30 goes deep and is ground uniformly. It becomes possible.

Further, although this type of grinding belt is worn out frequently and is frequently replaced, the endless grinding belt 32
Only the replacement is required, and the consumables can be supplied at low cost.

In the above structure, the support guide 37
By holding the belt running zone 30 and moving the entire grinding device 17 back and forth, the abrasive grain surface 35 of the belt running zone 30 is pressed against the required step surface f of the processed material w to perform grinding.
The supporting guide 37 may be biased outward by a known treading member, and a treading pressure may be applied to the supporting guide 37 to grind and polish the required step surface f of the processed material w.

[0021]

According to the present invention, the belt running belt 30 is joined to the peripheral surface of the endless rubber belt 31 so as to run integrally with the endless rubber belt 31, and the belt running belt 30 is pressed against the workpiece w. Therefore, the holding force of the endless rubber belt 31 allows the belt running zone 30 to grind the required step surface f of the processed material w without causing edge drooping, preventing corner drop, and By appropriately selecting a shape such as a trapezoid, the corner edge of the required grinding step surface f can be ground uniformly. Therefore, it is most suitable for grinding the deformed material w having the step portion and the inclined surface. Further, when the abrasive grain surface 35 is worn, only the endless grinding belt 32 needs to be replaced, and the consumables can be replaced at low cost, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a front view of a belt sander machine to which the present invention is applied.

FIG. 2 is a side view of a belt sander machine.

FIG. 3 is a plan view of a belt sander machine.

FIG. 4 is a vertical cross-sectional view of a belt running belt 30 showing an endless rubber belt 31 and an endless grinding belt 32 separated from each other.

FIG. 5 is a vertical cross-sectional view showing a grinding mode of a required step surface f of a processed material w.

FIG. 6 is a vertical cross-sectional view showing a grinding mode using a conventional endless sanding belt B.

[Explanation of sign]

 17 Grinding device 19, 20, 21 Pulley 30 Belt running band 31 Endless rubber belt 32 Endless grinding belt 33 Locking surface cloth 34 Non-locking surface cloth 35 Abrasive grain surface 37 Support guide 38 Trapezoidal guide groove

Claims (2)

[Claims] 1. An endless rubber belt running on a belt driving mechanism, and an endless grinding belt having an abrasive grain surface formed on an outer peripheral surface of the endless rubber belt, the number of which is mushroom-shaped or hook-shaped. One of the locking surface cloth having the locking projections and the non-locking surface cloth having countless group threads locked by the locking projections is attached to the outer peripheral surface of the rubber ring. The other end is attached to the inner surface of the endless grinding belt, and the endless grinding belt is joined to the peripheral surface of the endless rubber belt so that the belt travels so as to run integrally. Belt sander machine characterized by 2. A belt sander machine characterized in that a support guide is formed in a pressure contact portion with a processed material, and a guide groove is formed in which the belt traveling band is fitted in and travels outwardly. .