JPH0644593Y2 - Belt pressure pad device for belt sander - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a tread pad device for a belt sander machine.

[Prior Art] Inside the material feeding side of the sanding belt hung over the roll group, a tread pressure frame having a mounting groove opening to the material feeding passage side is arranged, and a tread pressure pad is built in the mounting groove. A belt sander machine having a treading pad device that presses the treading pad against the inner surface of the sanding belt via a flexible coating material is known.

An example of such a belt sander machine will be described with reference to FIG.

In FIG. 1, a handle 4 is provided on the front portion of the lower frame 1.
The material feeding frame 5 is supported by the raising and lowering screws 3, 3 which rotate in conjunction with each other. The material feeding frame 5 is provided with a material feeding device which supports a driving roller 6 and a driven roller 7 and which extends a material feeding belt 8 around the rollers 6 and 7 so as to be able to move up and down by the rotation of the handle 4. ing.

In the vertical frame 2 which is erected on the rear part of the lower frame 1,
A sanding frame 10 is provided on a material feeding device with a material feeding passage T placed therein, and a tension roller 11 also serving as a steering is provided above the sanding frame 10 in a vertically movable manner. Further, at the lower part of the sanding frame 10, a drive roller 12 is pivotally supported on the supply side and a driven roller 13 is supported on the discharge side, and a tread pad device P is provided between the drive roller 12 and the driven roller 13.
The tensioning roller 11, the driving roller 12, and the driven roller 13 are provided with a sanding belt 14, and when the processing material x comes directly under the pedaling pad device P, the processing material x supplied to the material feeding passage T is provided. To the sanding belt
14 is pressed.

FIG. 2 shows a general structure of a treading pad device P. A treading frame 20 is fitted between the drive roller 12 and the driven roller 13 of the sanding frame 10 so that the treading frame 20 can be freely loaded and removed in the width direction. An air bag 22 is mounted in a mounting groove 21 formed on the material feeding passage T side formed in 20.
On the lower surface of the air bag 22, a pressure regulating material S is formed by sandwiching a plurality of pins 24, which are arranged in parallel on the left and right in the transfer direction, between flexible plate materials 23, 23 made of leaf springs, rubber plates, and the like. A tread pressure pad 25 made of sponge, rubber, felt or the like is sequentially arranged. Further, the lower part of the tread pressure pad 25 has an opening 21 of a mounting groove 21.
It projects downward from a, and its lower surface is covered with a wear-resistant coating material 26 such as cloth which has good sliding property.
Immediately below, the internal pressure of the air bag 22 rises due to the pressure supplied from the supply port 22a, the lower surface of the tread pad 25 is pushed downward, and the sanding belt 14 is pressed against the work material x upper surface.

The air bag 22 may be omitted in the pedal pressure pad device P.

[Problems to be Solved by the Invention] By the way, in the conventional pressure pad device P,
As shown in the figure, when the working material x is ground and polished, the treading pad 25 is wider than the width of the working material x, and therefore the treading pressure of the sanding belt 14 corresponding to the portions without the working material at both ends of the working material x. Since the pad 25 applies the same treading pressure as that of a portion of the processed material, the sanding belt 14
Is subjected to grinding and polishing in a state where both corner edges e, e of the processed material x are surrounded, and excessive grinding and polishing is carried out at the end position of the processed material x, so that edge of the processed material x is likely to occur. In particular, when the processed material x has a warp and the corner edges e, e are projected from the main surface, the grinding and polishing amount becomes more and more excessive.

As a means for correcting this problem, as disclosed in Japanese Utility Model Publication No. 46-25496, both ends of the tread pad are V-shaped and the area is reduced to form a gentle pressure portion,
Thus, there has been proposed a structure in which the stepping pressure of the stepping pads at both ends of the processed material x is reduced to prevent end sagging.

By the way, in such a configuration, the width of the tread pad is
It is necessary to set in advance so that the gentle pressure portion is located at the end portion of the processed material x, and it is necessary to change the treading pad in accordance with the change in the width of the processed material x, which makes the handling troublesome. is there.

An object of the present invention is to provide a tread pad device having a function of preventing edge drooping which does not have such a conventional defect.

[Means for Solving the Problems] The present invention is to provide a large number of vertical cuts in the left-right direction at predetermined intervals in a tread pad, and a divided tread part that is continuous in the left-right direction by a non-cut portion between the cuts. Is formed.

[Operation] Adjacent divided treading portions between the notches of the treading pad are separated by the notches and move relative to each other, so that the treading action of the processed material is independently generated. For this reason, at the end of the processed material, the divided pedaling portions corresponding to the adjacent workpieces through the notches and the divided pedaling portions of the portion without the processed material generate discontinuous pedaling action, and the corners of the workpiece x are formed. The edges e, e are not surrounded by the sanding belt, and excessive grinding and polishing at that portion is prevented.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS.

30 is a pedaling pad according to the present invention.
As is clearly shown in a plan view, the vertical inclination cuts 31a and 31b are formed at predetermined intervals along the front surface and the rear surface with different inclination directions. The inclined notches 31a and 31b extend their tips to the center of the tread pad 30, respectively, and have a staggered positional relationship.

Thus, a large number of divided tread portions 32 are formed in the left-right direction on the tread pad 30 so as to be continuous between the inclined cuts 31a and 31b by the non-cut portions and independently generate the tread action of the work material.

In the step of grinding and polishing the processed material x having such a configuration, as shown in FIG. 5, at both ends of the processed material x, the divided tread portion 32 corresponding to a portion of the processed material x and the outside are formed. Separate tread part corresponding to the part without adjacent processed material x
With respect to 32, it is possible to move up and down relative to each other by the inclined notches 31a and 31b. Therefore, a stepped discontinuous surface is formed on the lower surface thereof, and the sanding belt 14 which is treaded by the treading pad 30 does not tightly surround the two end edges e, e of the processed material x, and therefore the end thereof is not formed. Who is prevented.

Further, in the case where the processed material x has both ends warped upward as shown in FIG. 6, the same action as described above does not apply strong pedaling pressure to the projecting corner edges e, e, Edge
Excessive grinding and polishing of e, e is prevented.

In addition, in the above-described configuration, since the inclined cuts 31a and 31b are formed, the cuts 31a and 31b are always located in the width direction of the tread pad 30. That is, the transverse line l in FIG.
Will intersect the cuts 31a, 31b. Therefore, regardless of the positions of the corner edges e, e of the processed material x with respect to the lower surface of the tread pad 30, the divided tread portion 32 can generate an independent tread action.

In order to reduce the amount of grinding and polishing at the end portion, as shown in FIG. 7, a cutting surface 33 may be formed at the front end portion or the rear end portion thereof to reduce the pedaling pressure area of the pedaling pad 30. good.

That is, in the case of polishing the coated surface coated on the surface of the processed material x, if the polishing amount per time is too large, the paint is also removed and the background is exposed, resulting in a defective product. As described above, the polishing amount needs to be an appropriate amount corresponding to the workpiece x to be polished. The polishing amount is the pressing force of the treading pad and the width of the treading pad in the material feeding direction-that is, the length by which one point on the upper surface of the processed material x is pressed on the sanding belt 14 by one grinding (continuous grinding and polishing distance). ) Is adjusted by. By the way, in the structure shown in the figure in which the cut surface 33 is formed on the pedal pressure pad 30, the width of the pedal pressure pad 30 in the material feeding direction can be reduced, which can contribute to beautiful grinding and polishing.

FIG. 8 shows a notch 31c, 31 that is perpendicular to the front and rear surfaces of the tread pad 30.
It is formed by staggering c. Even with such a configuration, the divided pedaling portion 32 that produces an independent pedaling action can be formed.

As described above, various forms of vertical cuts that can form the divided tread portion 32 can be proposed. Further, the cut is not necessarily limited to a vertical cut in the vertical direction.

[Advantage of the Invention] As described above, the present invention cuts into the pedal pressure pad 30 by the cuts 31a, 31b,
Since 31 c is formed and the divided tread portion 32 that produces an independent treading action is formed between the cuts, the lower surface of the tread pad 30 is discontinuous at the end of the processed material x, and the tread pressure is divided by the tread portion 32. The corner edges e, e of the processed material x are not separated by the sanding belt 14, and excessive grinding / polishing is eliminated, and there is an excellent effect that edge drooping can be prevented.

[Brief description of drawings]

1 is a schematic side view showing an example of a belt sander machine, FIG. 2 is a vertical sectional side view showing a pedaling pad device P, and FIG. 3 is a vertical sectional front view showing a pedaling pad device P of an embodiment of the present invention.
FIG. 4 is a perspective view of the treading pad 30, FIG. 5 and FIG. 6 are vertical sectional front views schematically showing grinding and polishing modes by the treading pad 30, and FIG. 7 is a perspective view of the treading pad 30 of the second embodiment. , 8th
The figure is a perspective view of the pedal pad 30 of the third embodiment. Further, FIG. 9 is a vertical cross-sectional front view showing a simplified manner of grinding and polishing by the pedaling pad 30 having the conventional structure. 14 ... Sanding belt 30 ... Tread pad 31a, 31b, 31c ... Cut 32 ... Split tread part 33 ... Cut surface P ... Tread pad device

Claims (1)

[Scope of utility model registration request] 1. A treading frame having a mounting groove opening to the material feeding passage side is provided inside the material feeding side of a sanding belt that is wound around a roll group, and a treading pad is built in the mounting groove. In a belt sander machine equipped with a treading pad device that presses the treading pad against the inner surface of a sanding belt via a flexible covering material, a large number of vertical cuts are formed in the left and right direction at predetermined intervals in the treading pad. A stepping pad device for a belt sander machine, characterized in that a divided stepping portion that is continuous in the left-right direction is formed by a non-cutting portion between each notch.