JPH0346266B2 - - Google Patents

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. Regarding type belt sander machine.

<Prior art> As shown in FIG.
A sanding belt f is stretched over a plurality of traveling rolls e including a turbulence roll over a material feeding device d, which is stretched over a sanding belt f, and a tread pad g is arranged inside the sanding belt f. h,
It is provided through a material feeding path p.

In order to clean the abrasive grain surface, the device includes:
An injection nozzle i for ejecting cleaning liquid is provided with its mouth end facing the outer surface of the sanding belt f,
Furthermore, a suction duct j for collecting cleaning liquid is arranged opposite to the belt f.

<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 spouts cleaning liquid as described above. The recovery means is one in which the mouth end of the suction duct j is directed toward the abrasive grain surface, and the area where the suction action is applied is narrow, so the recovery rate of the cleaning liquid is low, and it cannot be said to be an effective recovery means. .

In addition, the material feeding surface of the material feeding device d is set at a predetermined height so that the worker can easily supply and collect processed materials. Since a grinding device h is installed on top,
The disadvantage was that the length of the device was increased and the size of the device was increased.

The present invention is directed to a top surface grinding type wide belt sander equipped with a cleaning mechanism for the abrasive grain surface of the sanding belt, and is aimed at eliminating the conventional drawbacks.

<Means for Solving the Problems> The present invention includes a sanding belt that is passed 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 arranged 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 Above the top of the running
A tread pressure pad device is provided to press the sanding belt against the upper surface of the workpiece, and at least one of the running rolls is provided with a suction hole formed in its circumferential surface, and the inside of the roll is communicated with a low pressure source for liquid suction. The present invention is characterized in that it is a roll and includes a liquid supply means for supplying cleaning liquid to the inner surface of the sanding belt.

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

In addition, the polishing debris 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. It is compressed by being in pressure contact with the ding belt, and is sucked and collected through the suction hole.

<Example> An example of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a machine base, inside which there are liquid suction rolls 2 and 3 on the left and right along the traveling direction of the processed material.
Air injection rolls 4 are provided below them in an equilateral triangular arrangement. Each of the rolls 2, 3, and 4 described above also serves as a running roll, and a sanding belt 5 is wrapped around the rolls 2, 3, and 4. Moreover, any one of the rolls 2, 3, and 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. Note that 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, there is provided a material feeding device 1 that is perpendicular to the running direction of the sanding belt 5.
0 is placed. The material feeding device 10 has a second
As shown in the figure, a material feeding belt 13 is stretched around front and rear material feeding rolls 11 and 12, and a material feeding path 15 is defined between the running upper part 5a and the material feeding surface of the material feeding belt 13. Furthermore, the upper frame 1 on the material feeding device 10
A tread pad device 18 that comes into elastic contact with the upper surface of the running upper part 5a is disposed in the 7, and drives the cylinder 20 when the workpiece w is transferred to a position directly below the tread pad device 18 in the material feeding path 15. Then, by the urging pressure, the pad 19 is attached to the traveling upper part 5 to the workpiece w.
The elastic contact is made through a. Furthermore, pressure rolls 21, 21 are disposed at the front and rear of the treading pad device 18 for pressing the workpiece w against the material feeding surface side of the material feeding device 10 and applying material feeding force to the workpiece w.

The apparatus of the embodiment is equipped with a cleaning mechanism for removing polishing debris adhering to the abrasive grain surface 6 of the sanding belt 5.

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. The air injection roll 4
A pressurized air source is connected to its side end, and pressurized air from the pressurized air source is injected from the air injection hole 22. Further, a bay-shaped cover 24 is disposed on the air injection roll 4.

The air injection roll 4 is immersed in a liquid reservoir dish 25, and is directly placed in a liquid supply nozzle 26 facing the abrasive grain surface 6 on the inner surface of the sanding belt 5 on the upstream side of the run.
will be placed. Further, immediately downstream of the air injection roll 4, a pair of draining rolls 27, 27 are arranged to sandwich the sanding belt 5 from the front and back.

In addition, the liquid suction rolls 2 and 3 are as shown in FIG.
A suction hole 28 is formed on the circumferential surface, and a conduit 30 communicating with a vacuum pump 29 (low pressure source) is connected to the side end thereof. The conduit is also connected to a waste water drain port (not shown). Then, the suction hole 28 produces a suction effect on the cleaning liquid, and the suctioned liquid is collected from the drain port.

In the above configuration, when the workpiece w is supplied to the workpiece feeding path 15, the workpiece w is carried on the material feeding belt 13 of the material feeding device 10 and transported, and at the position of the tread pressure pad device 18, Abrasive grain surface 6 of sanding belt 5
The upper surface is ground and polished 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 its running upper part 5a, but the cleaning fluid is sprayed by the fluid supply nozzle 26, and the spraying pressure and cleaning action of the fluid cause the debris to adhere to the abrasive grain surface 6. It peels off from the abrasive grain surface 6 and separates within the liquid reservoir dish 25. Further, the air injection holes 2 of the air injection roll 4
By jetting pressurized air from 2, polishing debris is effectively removed in conjunction with the cleaning action of 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 drained.

In addition, 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 suctioned. It is sucked into the interior through the hole 28. 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 rolls 2 and 3,
Since the sanding belt 5 is in close contact with the circumferential surface of the roll, combined with the frictional force of the abrasive grain surface 6, there is no slippage of the sanding belt 5, and a large grinding force can be achieved.

Incidentally, the draining rolls 27, 27 may be omitted, and the liquid draining action may be performed only by the liquid suction rolls 2, 3.

In the embodiment described above, the liquid supply nozzle 26 and the liquid reservoir plate 25 both constitute a liquid supply means, and the liquid supply nozzle 26 is removed and only the liquid reservoir plate 25 is applied. You can do it like this.

In FIG. 4, large-diameter liquid suction rolls 40 and 41 are arranged on both sides of the material feeding device 10, the air injection roll is removed using only these rolls as traveling rolls, and the liquid is collected inside the liquid suction roll 41. A gutter 42 is disposed, and a liquid supply nozzle 43 is disposed within the recovery gutter 42 with its injection port facing toward the abrasive grain surface 6 side. One end of the recovery gutter 42 can also come into contact with the circumferential surface of the liquid suction roll 41 to improve liquid recovery.
Then, the liquid that has impregnated the abrasive grain surface 6 of the sanding belt 5 is supplied to the liquid suction roll 4 by the liquid supply nozzle 43.
1 and the majority of the liquid returns to the collection gutter 42, and the liquid impregnated into the abrasive grain surface is transferred to the liquid suction roll 4.
1 and 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 used as the abrasive grain surface 6, and the material feeding device 10 is disposed inside the sanding belt 5, and the upper surface and the running upper portion 5a At least one of the running rolls, which forms a material feeding path 15 between them and also produces a squeezing effect by contacting the abrasive grain surface 6, is connected to the liquid suction roll 2,
3, 40, and 41, since the liquid is sucked through the suction holes, () The liquid suction rolls 2, 3, 40, and 41 suck the cleaning liquid while squeezing the abrasive grain surface 6. The recovery rate is high, resulting in an improved cleaning effect.

() The abrasive grain surface 6 with large sliding resistance and the liquid suction rolls 2, 3, 40, 41 are brought into close contact by the suction action, and slippage between the sanding belt 5 and each liquid suction roll 2, 3, 40, 41 is prevented. The grinding force by the sanding belt 5 is large.

() Generally, in the top grinding type, it is necessary to arrange a suction duct facing the sanding belt in order to collect the cleaning liquid, but in the case of 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.

() 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.

() 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 drawings]

The accompanying drawings show embodiments of the present invention, and FIG. 1 is a longitudinal sectional front view of a top surface grinding type belt sander, FIG. 2 is a longitudinal sectional side view thereof, and FIG. 3 is a perspective view of liquid suction rolls 2 and 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. 1; Machine base, 2, 3; Liquid suction roll, 4; Air injection roll, 5; Sanding belt, 10; Material feeding device, 13; Material feeding belt, 15; Material feeding path, 1
8; tread pressure pad device, 22; air injection hole, 2
3; Pressure air source, 25; Liquid storage plate, 26; Liquid supply nozzle, 27, 27; Drainer roll, 28; Suction hole, 29; Vacuum pump, 40, 41; Liquid suction roll, 42; Collection gutter, 43; Liquid supply nozzle.

Claims (1)

[Claims] 1. A sanding belt is stretched around a plurality of running rolls with the abrasive grain side facing inside, and a material feeding device is installed directly below the running upper part of the belt in the running direction of the sanding belt. 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 tread pressure pad device is provided to press the sanding belt against the upper surface of the workpiece, and at least one of the running rolls is provided with a suction hole formed in its circumferential surface, and the inside of the roll is communicated with a low pressure source for liquid suction. A top surface grinding type belt sander, comprising a roll and 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.