JPS63229268A - Upper surface grinding type belt sander - Google Patents

Abstract

PURPOSE:To improve a washing effect and increase grinding capacity by providing a material feed device on the inside of a sanding belt and making at least one of the travel rolls of the sanding belt a liquid suction roll. CONSTITUTION:When a work W is transferred from a material feed device 10, its upper surface is sanded at the location of a step-on pressure pad position 18 with the abrasive grain surface 6 of the inner surface of a sanding belt 5 hung around on liquid suction rolls 2, 3 and an air injection 4. At this time, the sanding belt 5 is stuck with grinding scraps on the inner surface at its travel upper part 5a, but they are stripped off by the injection pressure of a washing liquid through a liquid supply nozzle 26, and further, grinding scraps are separated by air injection from an air injection roll 4 in a liquid pool chamber 25, and draining is done through the pinch-holding of a pair of rolls 27. Next, the washing liquid is further recovered by means of liquid suction rolls 2, 3, and at the same time, the slippage between the sanding belt 5 and rolls is gotten rid of. Thus, a washing device can be simplified by making a suction duct unnecessary, and further, the whole of a device can be miniaturized and at the same time, the improved of grinding power becomes possible.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is for grinding and polishing the upper surface of a workpiece using a sanding belt, and is a top surface grinding type equipped with a mechanism for cleaning the abrasive grain surface of the belt. Regarding belt sander machines.

<Prior Art> As shown in FIG. 5, a conventional belt sander a of this type has a driving roll mounted on the upper part of a material feeding device d which is formed by passing a material feeding bell (b) over a plurality of material feeding rolls C. A sanding belt f is passed around a plurality of running rolls e including a sanding belt f, and a grinding device is provided through a material feeding path P, and a tread pressure pad g is disposed inside the sanding belt f. be.

And the device is used to clean the abrasive surface.

An injection nozzle i for ejecting cleaning liquid is provided with its mouth end directed toward the outer surface of the sanding belt f, and a suction duct j for collecting the cleaning liquid is provided opposite to the belt f.
is installed.

<Problems to be Solved by the Invention> In this configuration, the abrasive grain surface of the sanding belt is cleaned by the jet nozzle i that jets the cleaning liquid as described above, but the means for collecting the cleaning liquid is , the mouth end of the suction duct j is directed toward the abrasive grain surface, and the area where the suction action is exerted is narrow, resulting in a low recovery rate of cleaning liquid, and it cannot be said to be an effective recovery means.

Further, the material feeding surface of the material feeding device d is set at a predetermined height so that one worker can easily supply and collect processed materials, but in the above configuration, the material feeding surface of the material feeding device d is Since the grinding device fah is disposed on the top, there is a drawback that the device becomes taller and larger.

The present invention relates to a top surface grinding type wide belt sander equipped with a cleaning mechanism for the abrasive grain surface of a sanding belt, and aims to eliminate the drawbacks of the conventional sander.

Means for Solving Problems> The present invention provides a sanding belt that is wound around a plurality of running rolls with its abrasive grain side facing inside, and a material feeding device that is placed directly below the running upper part of the belt. The sanding belt is disposed perpendicularly to the running direction of the sanding belt to form a running path for the processed material between the running upper part of the sanding belt and the material feeding surface of the material feeding device, and further above the running upper part of the sanding belt. a pressure pad device for pressing the sanding belt against the upper surface of the workpiece; The present invention is characterized in that it includes a suction roll and a liquid supply means for supplying cleaning liquid to the inner surface of the sanding belt.

Effect> The upper surface of the workpiece supplied into the workpiece feeding path is ground and polished by the abrasive grain surface inside the sanding belt from a direction perpendicular to the running direction.

In addition, the polishing layer adhering to the abrasive grain surface on the inner surface of the sanding belt is supplied with cleaning liquid from the liquid supply means, and is peeled off by the cleaning action. Due to the pressure contact, the material is squeezed and collected through the suction hole.

<Example> An embodiment of the invention will be described with reference to FIG. 1.2.

Reference numeral 1 denotes a machine base, inside which liquid suction rolls 2.3 are placed on the left and right, and air injection rolls 4 are placed below them in an equilateral triangular arrangement along the traveling direction of the processed material. It is provided. Each of the rolls 2, 3.4 described above also serves as a running roll, and a sanding belt 5 is wrapped around the rolls 2, 3.4. Further, one of the rolls 2, 3.4 is used as a driving roll. Further, the sanding belt 5 has an abrasive grain surface 6 on its inner side. Each member constitutes a grinding device. The details of the rolls 2, 3, and 4 will be described later.

Immediately below the running upper part 5a of the sanding belt 5, a material feeding device 10 is disposed orthogonal to the running direction of the belt 5. As shown in FIG. 2, the material feeding device 10 is constructed by passing a material belt 13 between the front and rear material feeding rolls 11 and 12, and transports the material between the traveling upper part 5a and the material feeding surface of the material feeding bell 13. A material passage 15 is provided. Further, in the upper frame 17 on the material feeding device 10, a treading pad device 18 that comes into elastic contact with the upper surface of the traveling upper portion 5a is disposed, and the workpiece W is placed directly below the treading pad device 18 in the material feeding path 15. When the cylinder 20 is transferred, the cylinder 20 is driven and the pad 19 is moved by its biasing pressure.
is brought into elastic contact with the workpiece W via the running upper part 5a. Further, at the front and rear of the treading pad device 18, pressure rolls 21 and 21 are arranged to press the workpiece W against the material feeding surface side of the material feeding device 10 and apply material feeding force to the workpiece W.

The apparatus of the embodiment includes an abrasive grain surface 6 of the sanding belt 5.
A cleaning mechanism is provided to remove polishing debris adhering to the surface.

Next, the configuration of this cleaning mechanism will be explained.

The air injection roll 4 has air injection holes 22 formed on its circumferential surface. A pressure air source is connected to the side end of the air injection roll 4, and pressurized air from the pressure air source is injected from the air injection holes 22. Further, a groove-shaped cover 24 is disposed on the air injection roll 4.

The air injection roll 4 is immersed in a liquid reservoir dish 25,
A liquid supply nozzle 26 is disposed opposite the abrasive grain surface 6 on the inner surface of the sanding belt 5 immediately upstream of the sanding belt. Furthermore, immediately downstream of the air injection roll 4, there is a pair of draining rolls 27 that sandwich the sanding belt 5 from the front and back.
27 is placed.

Further, as shown in FIG. 3, the liquid suction roll 2.3 has a suction hole 28 formed in its peripheral surface, and a conduit 30 communicating with a vacuum pump 29 (low pressure source) is connected to the side end of the suction hole 28. The conduit is also connected to a waste water drain port (not shown), and the suction hole 28 produces a suction effect on the cleaning liquid, and the sucked liquid is collected from the waste water drain port.

With the above configuration, when the workpiece W is supplied to the workpiece feeding path 15, the workpiece W is carried on the material feeding bell (13) of the material feeding device 10, and is transported at the position of the treading pad device 18. The upper surface is ground and polished by the abrasive surface 6 of the sanding belt 5 from a direction perpendicular to the running direction.

At this time, sanding debris adheres to the abrasive grain surface 6 of the sanding belt 5 at the position of the running upper part 5a, but the cleaning liquid is sprayed by the liquid supply nozzle 26, and the spraying pressure and the cleaning action of the liquid remove the abrasive debris. It is peeled off from the grain surface 6 and separated in the liquid reservoir dish 25. Further, by jetting pressurized air from the air jet holes 22 of the air jet roll 4, polishing debris is effectively removed in conjunction with the cleaning action by the liquid supply nozzle 26.

Next, the cleaning liquid impregnated on the abrasive grain surface 6 of the sanding belt 5 is held between draining rolls 27 and 27 to drain the liquid.

Moreover, since each liquid suction roll 2, 3 is in direct contact with the abrasive grain surface 6, this liquid draining is also performed by each liquid suction roll 2, 3, and the squeezed liquid is drained from the suction hole 28. is sucked into its interior. Therefore, the cleaning liquid impregnated into the abrasive grain surface 6 can be sufficiently recovered.

Furthermore, due to the suction effect of the liquid suction roll 2.3, the sanding belt 5 comes into close contact with the peripheral surface of the roll, so that the abrasive grain surface 6.
Combined with the frictional force of , the sanding belt 5 does not slip, and a large grinding force can be achieved.

In addition, the draining rolls 27 and 27 are omitted, and the liquid suction roll 2
．． 3 may be used alone to perform the liquid draining action.

In the above embodiment, the liquid supply nozzle 26 and the liquid reservoir plate 25
Both constitute liquid supply means, and the liquid supply nozzle 26 may be removed and only the liquid reservoir plate 25 may be used.

Figure 4 shows large diameter liquid suction rolls 4 on both sides of the material feeding device R10.
0.41 is disposed, this roll is used as the traveling roll only, the air injection roll is removed, and the liquid suction roll 41 is further removed.
A recovery gutter 42 is disposed inside the abrasive grain surface 6, and a liquid supply nozzle 43 is disposed within the recovery gutter 42 with its injection port facing the abrasive grain surface 6 side. One end of the collection gutter 42 is connected to the liquid suction roll 4
It is also possible to improve liquid recovery by contacting the circumferential surface of 1.

Then, the liquid impregnated into the abrasive grain surface 6 of the sanding belt 5 by the liquid supply nozzle 43 is squeezed by the liquid suction roll 41 and most of it returns to the collection gutter 42, and the liquid impregnated into the abrasive grain surface is sequentially sucked into the liquid suction roll 41 and the liquid suction roll 3 and collected.

In such a configuration, the collection gutter 43 is located immediately downstream of the grinding position of the workpiece W, so that the abrasive debris adhering to the abrasive grain surface 6 is compressed by the traveling roll and removed from the abrasive grain surface 6. Since it is possible to perform liquid cleaning before solidifying inside the liquid, there is an advantage that the cleaning effect is good.

<Effects of the Invention> As described above, in the present invention, the inner surface of the sanding belt 5 is the abrasive grain surface 6, and the material feeding device IO is arranged inside the sanding belt 5, and between the upper surface of the sanding belt 5 and the running upper portion 5a. At least one of the running rolls that forms the material feeding path 15 and also produces a squeezing effect by contacting the abrasive grain surface 6 is used as a liquid suction roll 2° 3, 40, 41 to suck the liquid from the suction hole. Therefore, (1) The liquid suction rolls 2, 3, 40, and 41 suck the cleaning liquid while squeezing the abrasive grain surface 6, and the recovery rate of the cleaning liquid is high, resulting in an improved cleaning effect.

■) Abrasive grain surface 6 with large sliding resistance and liquid suction roll 2.3,
40.41 are brought into close contact with each other by suction, there is little slippage between the sanding belt 5 and each liquid suction roll 2, 3°40.41, and the sanding belt 5 provides a large grinding force.

■) In general, top surface grinding types require a suction duct to be placed opposite the sanding belt in order to collect the cleaning liquid, but with the present invention, the suction duct is not necessary and By using the running roll of the sanding belt 5 and the liquid suction rolls 2°3.40, 41, the number of parts of the cleaning mechanism is reduced.

(2) The grinding device and the material feeding device 10 can be disposed below the material feeding path 15, and the length of the device can be shortened, contributing to miniaturization of the device.

(2) Since the abrasive grain surface 6 does not appear on the outer surface of the sanding belt 5, even if your hand touches the outer surface of the sanding belt 5 by mistake while the sanding belt 5 is running, there will be no accident resulting in injury or death, resulting in a high level of safety.

There are other effects.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, in which Fig. 1 is a longitudinal sectional front view of a top grinding type belt sander, Fig. 2 is a longitudinal sectional side view thereof, and Fig. 3 is a perspective view of the liquid suction roll 2.3. FIG. 4 is a longitudinal sectional front view of another embodiment. Further, FIG. 5 is a front view showing an outline of a conventional top surface grinding type belt sander machine.

Claims (1)

[Claims] 1) A sanding belt is passed around a plurality of running rolls with the abrasive grain side facing inside, and a material feeding device is placed directly below the running upper part of the belt in the running direction of the sanding belt. The sanding belt is disposed orthogonally to the sanding belt to form a running path for the processed material between the running upper part of the sanding belt and the material feeding surface of the material feeding device, and furthermore, the sanding belt is disposed on the running upper part of the sanding belt. A tread pad device is provided to press against the upper surface of the workpiece, and at least one of the traveling rolls is a liquid suction roll having suction holes formed in the circumferential surface and communicating the inside of the roll with a low pressure source, A top surface grinding type belt sander, characterized in that it is equipped with a liquid supply means for supplying a cleaning liquid to the inner surface of the sanding belt. 2) The top surface grinding type belt sander according to claim 1, wherein the liquid supply means is a cleaning liquid supply nozzle whose mouth end is directed toward the inner surface of the sanding belt. 3) The top surface grinding type belt sander according to claim 1, wherein the liquid supply means is a liquid collecting tray in which the sanding belt is immersed.