JPS6374560A - Belt sanding machine - Google Patents

Abstract

PURPOSE:To easily mount and remove an endless sanding belt, by equipping a belt sanding machine with a control means, which performs the positioning of movable guide plates in a parallel position with the running direction, and a reversible driving gear which moves end parts in a sanding roll side of the guide plates to the side of a material feed table. CONSTITUTION:Movable guide plates 28, which are held in a parallel position with the running direction by a restricting means in a normal condition, guide a work material W to an endless sanding roll 17. And the work material W is polished by the thickness of stepped difference amount between a guide surface of the movable guide plate 28 and the sanding roll 17. While in the case of replacement of an endless sanding belt 18 required for wear or the like of its peripheral surface, a movable cylinder 32 is driven extending and lowering the point end part of the movable guide plate 28 to be retracted from the peripheral surface of the sanding roll 17, and in this condition, the endless sanding belt 18 is mounted and removed. Consequently, the sanding belt 18 is easily mounted and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a belt sander that grinds and combines the surface of wood, which is ideal for grinding and combining a thin plate.

<Prior art> A sanding roll is used to grind the thickness of a workpiece to a certain size or to follow the grain, paint, distortion, warp, unevenness, etc. of the workpiece surface. Belt sanders that press against the surface to be processed are known.

Among such belt sanders, this machine is especially suitable for grinding and polishing thin plate-shaped workpieces.

In order to produce a constant amount of grinding regardless of uneven thickness of the workpiece, warping, etc., guide surfaces are formed before and after the sanding roll that determine the amount of grinding by the difference in level with the roll,
A device in which the workpiece is pressed against the guide surface from the feed table side is known as disclosed in Japanese Patent Publication No. 44-2959.

<Problems to be Solved by the Invention> Incidentally, it is desirable that the end of the guide surface on the sanding roll side be as close to the sanding roll as possible in order to produce good guiding action. . On the other hand, the members constituting the conventional guide surface only allow relative movement with respect to the sanding roll to the extent that the amount of polishing can be adjusted.
Since it is a configuration that corresponds to the constant, it is not possible to quickly and greatly change the mutual relationship.

For this reason, when the sanding belt stretched around the sanding roll is replaced due to wear or a change in specifications, the end of the guide member gets caught on the belt, making it difficult to separate. Alternatively, in consideration of this difficulty, when the guide member is disposed apart from the sanding roll, the guiding action of the guide member is reduced.

The object of the present invention is to provide a belt sangu machine that does not have the above-mentioned drawbacks.

Means for Solving the Problems> The present invention comprises: a movable guide plate disposed before and after a sanding roll with a material feeding table and a material feeding path; and a movable guide plate positioned parallel to the running direction. The present invention is characterized by comprising: a regulating means for positioning; and a reversible drive device for moving the end of the movable guide plate on the sanding roll side toward the material feeding table.

Function> Under normal conditions, the movable guide plate is held in a position parallel to the traveling direction by the regulating means, and guides the workpiece to the sanding roll. Then, the processed material is polished to a thickness equal to the difference between the guide surface of the movable guide plate and the step of the sanding roll.

When replacing the sanding belt, the reversible drive device is operated to separate the end of the movable guide plate from the sanding roll. This makes it easy to attach and detach the sanding belt.

<Example> An embodiment of the invention will be described with reference to the accompanying drawings.

1 and 2, reference numeral 1 denotes a lower frame, on the upper part of which is disposed a material feeding frame 5 supported so as to be movable up and down by a lifting screw 3 that rotates in conjunction with a handle 4. The material feeding frame 5 includes a large-diameter drive roller 7 and drive rollers 8a before and after the large-diameter drive roller 7.

8b is supported, and its upper edge is exposed from the material feeding table 6 of the material feeding frame 5. The drive roller 7 and the drive rollers 8a and 8b are driven by deceleration motors 9 and 10, respectively, so that their circumferential speeds can be controlled differently. Then, the circumferential surfaces of the driving roller 7 and the driving rollers 8a and 8b come into contact with the lower surface of the workpiece W supplied onto the material feeding table 6, and material feeding force is applied. So, material feeding frame 5
, drive rollers 7.8a and 8b, etc. constitute a material feeding device.

A vertical frame 15 is supported on the material feeding frame 5.

A running roll 16 for both steering and tension is disposed on the upper part of the vertical frame 15 so as to be movable up and down. moreover,
A sanding roll 17 is disposed below the traveling roll 16, and is operated as a drive roll by a drive motor (not shown), and is opposed to the material feeding table 6 via the material feeding path S. That is, the running roll 16 and the sanding roll 17 constitute a grinding roll group.

Then, the running roll 16 and the sanding roll 17
An endless sanding belt 18 is stretched over the sanding belt 18, and the sanding roll 17 drives the sanding belt 18 in the direction of the arrow in FIG.

As shown in the left position in Figure 2 and Figure 4, Sampuino/j
On both sides of the a-rule 17, a support shaft 20.20 is extended in the width direction to the front and rear attachment parts 19 of the vertical frame 15, and a suppression roll 23.23 can be freely rotated on the support shaft 20.20. A supported suppression member 21.21 is fitted. Then, the ammunition 22 such as a spring is attached to the suppressing member 21.21.
The pressure rollers 23 and 23 are biased downward toward the material feeding table 6 and held at the lowest position where they are stopped by the stopper 24.

Next, the main parts of the present invention will be explained.

As shown in FIGS. 2 to 4, the sanding roll 17
A shaft piece 26 is in contact with the fitting guide groove 25 on the sanding roll 17 side of the attachment portion 19 on both sides. The citron piece 26 is supported by an adjustment screw 27 supported by the attachment portion 19, and can be slightly raised and lowered by its rotation.

On the shaft piece 26, an L-shaped support member 29 fixed to the upper surface of both ends of a movable guide plate 28 disposed along the front and rear of the sanding roll 17 is rotatably supported by a shaft 30. be done. Further, as shown in FIG. 3, a spring 31 is attached between the shaft piece 26 and the lower back surface of the support member 29, and the movable guide plate 28 at the right position in the figure is biased clockwise. The movable guide plate 28 at the same left position is biased counterclockwise. Further, a rotating cylinder 32 is disposed at the back of the upper end of the support member 29, and the top of the support member 29 is brought into contact with the tip of the rod 33 in a contracted state due to the biasing action of the spring 31. . In this state, the movable guide plate 28 is held at a position parallel to the material feeding table 6. In other words, the above-mentioned Hatsujo 31
and the rod 33 constitute a regulating means for maintaining the hydraulic position of the movable guide plate 28. and the movable guide plate 2
8 is in a horizontal state, with its tip end close to the lower circumferential surface of the sanding roll 17.

Furthermore, the step between the guide surface of the movable guide plate 28 and the lower edge of the endless sanding belt 18 is
This specifies the amount of grinding according to 8, and this amount of grinding is
It can be adjusted by rotating the adjustment screw 27.

When the rotation cylinder 32 is driven to extend, the movable guide plate 28 rotates about the shaft 30 against the spring 31, as shown by the chain line in FIG. From the circumferential surface of the sanding roll 17, it is retracted downward toward the material feeding table 6 side. That is, the rotation cylinder 32 constitutes a reversible rotation device for the movable guide plate 28.

The operation of the above embodiment will be explained.

When the workpiece W is fed onto the material feeding table 6, a feeding force is applied by the driving roller 7 and the driving rollers 8a and 8b, and the upper surface thereof is brought into contact with the movable guide plate 28, and the material W is run on the material feeding table 6. , the endless sanding belt 18 performs grinding corresponding to the difference in level between the movable guide plate 28 and the movable guide plate 28 .

Incidentally, the endless sanding belt 18 may need to be replaced due to wear on its circumferential surface or the like. Therefore, as shown by the chain line in FIG. 3, the rotation cylinder 32 is driven to extend,
The tip of the movable guide plate 28 is lowered and retracted from the circumferential surface of the sanding roll 17, and in this state, the endless sanding belt 18 is attached and detached.

5-7 show a second embodiment of the invention.

The movable guide plate 28 is movable up and down, and its tip can be lowered and retracted from the sanding roll 17.

That is, the sanding roll 17 of the attachment portion 19
A dovetail-shaped guide groove 40 is formed on the side, and a sliding piece 42 is fitted into the guide groove 40. At the top of the sliding piece 42,
A control screw 41 supported by the mounting portion 19 is screwed into the mounting portion 19, and as the control screw 41 rotates, the sliding piece 42 moves up and down.

Further, a dovetail groove 43 is formed on the other surface of the sliding piece 42.

An L-shaped support member 46 fixed to the upper surface of both ends of a movable guide plate 45 disposed along the front and rear sides of the sanding roll 17 is fitted into the dovetail groove 43 at the back surface, and the support member 46 An adjustment screw 44 supported by the sliding piece 42 is screwed into the upper part of the member 46. And the adjustment screw 44
, the support member 46 moves into the dovetail groove 4 of the sliding piece 42.
It will go up and down along 3.

The sliding pieces 42 described above are provided on both sides of the movable guide plate 45 at the front and on both sides of the movable guide plate 45 at the rear. A bevel gear 47 is provided.

As shown in FIG. 3, the bevel gear 47 of each sliding piece 42
are linked by a coupling mechanism 48, and are linked by driving a reversible drive motor 49. As the control screw 41 rotates, the sliding piece 42. Movable guide plate 45. Support member 46
moves up and down as one unit.

That is, the front and rear movable guide plates 45, 45 are raised and lowered at the same time, and the solid line position in FIG. 5 is converted to the fQ line position. The workpiece W is ground at the solid line position, and the endless sanding belt 18 is replaced at the chain line position.

In this embodiment, the tip of the movable guide plate 45 can be raised and lowered by controlling the rotation of the control screw 41 by the reversible drive motor 49.

Therefore, the control screw 41 constitutes a reversible drive device for the movable guide plate 45. Furthermore, since the control screw 41 can hold the movable guide plate 45 at a desired horizontal position by itself, it also serves as a regulating means for positioning the movable guide plate 45 in a position parallel to the traveling direction of the workpiece W. It will be configured.

Incidentally, since the amount of sanding by the endless sanding belt 18 requires fine adjustment, it can be adjusted using the adjusting screw 44.

Furthermore, FIGS. 8 to 10 show modifications of the first embodiment.

That is, in FIG. 8, the single spring 31 is removed, the rotary cylinder 32 is pivotally supported on the vertical frame 12 by the shaft 50, and the rod 33 is pivotally supported at the upper end position of the support member 29 by the shaft 51, and the rod 33 and a support member 29 are connected. In this configuration, the horizontal position of the movable guide plate 28 is defined by the rod 33 in the most retracted position. That is, the regulating means of the present invention is constituted by the rod 33.

In FIG. 9, a horizontal piece 53 is projected from the back surface of the support member 29, a spring 31 is applied to its upper surface, and a rod 33 of a rotating cylinder 32 is brought into contact with its lower surface.

In FIG. 10, the rod 33 of the rotating cylinder 32 is connected to the horizontal piece 53 by a shaft 54.

Instead of the rotating cylinder 32, various reversible drive devices such as a solenoid and a double-centered cam can be used. Such a device uses a movable guide plate 4 instead of the bevel gear 47 of the second embodiment.
It can also be used to raise and lower 5.

In addition, various types of stoppers may be used as means for regulating the normal position of the movable guide plate 28.45.

Further, in each of the embodiments described above, the present invention is applied to a top surface grinding type, but the relationship between the upper and lower sides of the material feeding table 6 and the sanding roll 17 is changed, and the grinding part such as the sanding roll 17 is The present invention may be applied to a bottom surface grinding type which is located below the material passage.

<Effects of the Invention> As described above, the present invention enables the movable guide plate to be retracted from the sanding roll, and by changing the disengagement position of the movable guide plate, the endless sanding belt can be easily attached and detached, and its replacement work is simplified. can be done quickly and safely.

Also, move the movable guide plate closest to the sanding roll side.
Therefore, the guiding action is performed well, and there are excellent effects such as a good grinding condition of the workpiece.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a belt sangu machine to which the present invention is applied, Figs. 2 to 4 show a first embodiment of the present invention, and Fig.
3 is an enlarged side view showing the operation of the movable guide plate 28, and FIG. 4 is a plan view of the end of the movable guide plate 28. 5 to 7 show a second embodiment of the present invention, and FIG. 5 is an enlarged side view showing the operation of the movable guide plate 45;
6 is a plan view of the end of the movable guide plate 45, and FIG. 7 is a diagram of the interlocking mechanism of the control screw 41. Moreover, FIGS. 8 to 10 show modifications of the first embodiment. 5; Material feeding frame 6; Material feeding table 7゜8a, 8b
; Drive roller; Material feeding bag 2116; Running roll 17;
Sanding roll 18; Endless sanding belt 2
7; Adjustment screw 28; Movable guide plate 31; Spring 32;
Rotating cylinder 41: Control screw 44: Adjustment screw 4
5; Movable guide plate 46: - Umbrella south wheel 49; Reversible drive motor 1st figure

Claims (1)

[Scope of Claims] 1) In a belt sander machine in which an endless sanding belt is stretched around a group of grinding rolls including a sanding roll placed opposite to a material feeding table with a material feeding path, before and after the sanding roll, a movable guide plate disposed with a material feeding table and a material feeding path; a regulating means for positioning the movable guide plate in a position parallel to the traveling direction; and a sanding roll side end of the movable guide plate placed between the material feeding table and the material feeding path. A belt sander machine characterized by being equipped with a reversible drive device that moves sideways. 2) The movable guide plate is a rotary guide plate that rotates around a support shaft, the regulating means is a rotation regulating means, and the reversible drive device is a rotating guide plate that rotates around a support shaft; 2. The belt sander according to claim 1, wherein each belt sander comprises a reversible rotating device that rotates in a direction away from the roll. 3) The movable guide plate is a guide plate that can be moved toward and away from the material feeding table, and the control means and the reversible drive device are screwed onto the movable guide plate in a direction perpendicular to the material running direction. A belt sander according to claim 1, characterized in that the belt sander comprises: