JPH0346265B2 - - Google Patents

Description

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

<Prior art> As shown in FIG.
A sanding belt f is stretched over a plurality of running rolls e including a drive roll over a material feeding device d, which is stretched over a sanding belt f, and a tread pad g is disposed 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:
A liquid supply nozzle i for spouting cleaning liquid is provided with its mouth end facing the outer surface of the sanding belt f, and a suction duct j for collecting the cleaning liquid is further provided opposite to the belt f. There is.

<Problems to be Solved by the Invention> In this configuration, the polishing surface of the sanding belt is cleaned by the liquid supply nozzle i that spouts the cleaning liquid as described above. It is necessary to provide a suction duct j to prevent the material from dripping into the running material path, which tends to complicate the structure.

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.

On the other hand, in the case of a bottom-grinding type belt sander machine in which a grinding device is installed at the bottom of the material feeding path to grind the bottom surface of the workpiece, the grinding device is located below the material feeding surface, so the length can be lowered. Furthermore, even when the cleaning liquid is supplied from the liquid supply nozzle, a suction duct is not necessarily required because there is no workpiece below it. However, since the bottom surface grinding type belt sander requires a material feeding device to be disposed at the top, there is a limit to miniaturization. Moreover, unlike the top surface grinding type, the bottom surface grinding type has drawbacks such as the fact that the ground surface cannot be checked while the vehicle is running, and the grinding state cannot be visually controlled. That is, the bottom surface grinding type belt sander machine has advantages and disadvantages compared to the top surface grinding type belt sander machine, and should be selected depending on the intended use.

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 On top of the running top,
A treading pad device is provided to press the sanding belt against the upper surface of the workpiece, and at least one of the traveling rolls has air injection holes formed in its circumferential surface, and the inside of the roll is communicated with a pressurized air source. The present invention is characterized by comprising an air injection roll and a liquid supply means for supplying a 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 attached to the abrasive grain surface on the inner surface of the sanding belt is supplied with cleaning liquid from the liquid supply means and receives the cleaning action of the liquid, and then comes into contact with the air injection roll and is peeled off from the abrasive grain surface by the pressurized air. .

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

Reference numeral 1 denotes a machine base, in which upper running rolls 2 and 3 are placed on the left and right, and air injection rolls 4, which will be described later, are arranged below them in an equilateral triangular arrangement along the traveling direction of the processed material. It is set in. The air injection roll 4 also serves as a running roll, and a sanding belt 5 is wrapped around the running rolls 2, 3, and 4. The traveling rolls 2 and 3 are made of rubber rolls, and one of them 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.

Directly below the running upper part 5a of the sanding belt 5, there is 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 the front and rear material feeding rolls 11 and 12, and the upper part 5
A and a material feeding surface of the material feeding belt 13 are defined as a material feeding path 15. Further, in the upper frame 17 on the material feeding device 10, a treading pad device 18 is disposed which comes into elastic contact with the upper surface of the traveling upper portion 5a, and the workpiece w is placed directly under the treading pad device 18 in the material feeding path 15. When the workpiece is transferred, the cylinder 20 is driven and its biasing pressure causes the pad 19 to come into elastic contact with the workpiece w via the running upper part 5a. Furthermore, pressure rolls 21 and 21 are disposed at the front and rear of the pressure 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.

As shown in FIGS. 3 and 4, the air injection roll 4 has air injection holes 22 formed on its circumferential surface. A pressure air source 23 is connected to the side end of the air injection roll 4 , and pressurized air from the pressure air source 23 is injected from the air injection holes 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 a liquid supply nozzle 26 is placed opposite the abrasive grain surface 6 on the inner surface of the sanding belt 5 immediately upstream of the air injection roll 4.
will be placed. Also, a pair of draining rolls 27, 27 are arranged immediately downstream of the air injection roll 4 to sandwich the sanding belt 5 from the front and back.

In the above configuration, when the workpiece w is supplied to the workpiece conveyance path 15, the workpiece w is carried on the workpiece conveying belt 13 of the workpiece conveyance device 10 and transferred, and is placed in the sand at the position of the tread pressure pad device 18. Abrasive grain surface 6 of deing 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 inner surface of the sanding belt 5 at the position of its running upper part 5a, but the cleaning liquid is sprayed by the liquid supply nozzle 26.
Due to the jetting pressure and the cleaning action of the liquid, the abrasive particles are peeled off from the abrasive grain surface 6 and separated in the liquid reservoir dish 25. Furthermore, 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 of the liquid supply nozzle 26. The cleaning liquid impregnated on the abrasive grain surface 6 of the sanding belt 5 is then transferred to the draining roll 2.
It is clamped between 7 and 27 to drain the liquid. This liquid draining is also performed by each running roll 2, 3, since each running roll 2, 3 is in direct contact with the abrasive grain surface 6 and is made of a rubber roll, and is also performed by each running roll 2, 3, and the draining roll 27, 27 Combined with this, it becomes possible to squeeze out the liquid sufficiently. Also drainer roll 2
7 and 27 may be omitted and the liquid draining action may be performed only by the running rolls 2 and 3.

The air injection roll 4 has circumferential grooves 30 formed at appropriate intervals as shown in FIGS.
The air injection holes 31 may be formed on the circumferential surface including the outer surface. In this case, since the air injection holes 31 formed on the outer surface of the circumferential groove 30 are not blocked by contact with the sanding belt 5, air can be ejected well.

Further, the air injection holes 22 and 31 are inclined with respect to the radial direction, and the air injection is applied to the abrasive grain surface 6 of the sanding belt 5 from an oblique direction, thereby improving the effect of blowing off the abrasive debris. Good too.

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. 7, a recovery gutter 40 is provided inside the running roll 3, and a liquid supply nozzle 41 is provided in the recovery gutter 40 with its injection port facing the abrasive grain surface 6 side. One end of the recovery gutter 40 can also come into contact with the circumferential surface of the traveling roll 3 to improve liquid recovery. Then, the liquid impregnated into the abrasive grain surface 6 of the sanding belt 5 by the liquid supply nozzle 41 is sprayed with pressurized air by the air injection roll 4, and the polishing debris is removed. In this configuration, a liquid receiving gutter 42 is provided below the air injection roll 4.

In such a configuration, the collection gutter 40 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 inside of the sanding belt 5 is used as the abrasive grain surface 6, and the material feeding device 10 is arranged inside the sanding belt 5, and the upper surface and the running upper part 5a are disposed inside the sanding belt 5. A material feeding passage 15 is formed between them, and a liquid supply means for supplying a cleaning liquid to the abrasive grain surface 6 is provided, and at least one running roll of the sanding belt 5 is an air injection roll 4. (I) 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.

() In general, in the case of top-grinding type, when supplying cleaning liquid to the sanding belt, a suction duct for collecting the cleaning liquid is placed opposite the sanding belt to prevent the liquid from dripping into the running material path. However, since the sanding belt 5, except for its running upper part 5a, is arranged at the lower part of the material feeding path 15, droplets will not fall on the workpiece w, and the sanding belt 5 will not fall on the workpiece w. The cleaning mechanism becomes simple as no duct is required.

() Air injection hole 22 of air injection roll 4,
Since pressurized air is ejected from the sanding belt 31, the polishing debris accumulated on the abrasive grain surface 6 of the sanding belt 5 is blown away, resulting in a high cleaning effect.

() The running roll of the sanding belt 5 and the air injection roll 4 are also used, so that the number of parts does not increase.

() Since the abrasive grain surface 6 with high sliding resistance is in contact with the running rolls 2, 3, 4, there is little slippage between the sanding belt 5 and each running roll 2, 3, 4, and the sanding belt 5 The grinding force is large.

() 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, in which FIG. 1 is a longitudinal sectional front view of a top surface grinding belt sander, FIG. 2 is a longitudinal sectional side view thereof, and FIG. 3 is an enlarged longitudinal sectional side view of the air injection roll 4. Figure 4 is a perspective view of the same. Moreover, FIG. 5 is a longitudinal sectional side view of the air injection roll 4 of a modified example, and FIG. 6 is a perspective view thereof. Furthermore, FIG. 7 shows a longitudinal sectional front view of another embodiment. FIG. 8 is a front view showing an outline of a conventional top surface grinding type belt sander. 1; Machine base, 2, 3; Running 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 reservoir plate, 26; Liquid supply nozzle, 27, 27; Draining roll, 30; Circumferential groove,
31; Air injection hole; 33; Recovery gutter; 40; Recovery gutter; 41; 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 treading pad device is provided to press the sanding belt against the upper surface of the workpiece, and at least one of the traveling rolls has air injection holes formed in its circumferential surface, and the inside of the roll is communicated with a pressurized air source. A top surface grinding type belt sander, comprising an air injection 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.