JP2568945Y2 - Stepping device for wide belt sander - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a grinding and polishing process in which an endless sanding belt circulating and running in parallel with the running direction is pressed against a workpiece transferred on a material feeding surface by a stepping body. The present invention relates to a stepping device for a wide belt sander of a type to be applied, and more particularly to a stepping device capable of performing a favorable process without causing end sagging on left and right side edges of a workpiece.

[0002]

2. Description of the Related Art Conventionally, as a stepping device for a belt sander having a function of preventing the left and right side edges of a workpiece from dripping as described above, Japanese Patent Application Publication No.
What was published as application No. 31563 is publicly known.

This conventional apparatus is applied to a band-type belt sander in which a sanding belt circulates and runs at right angles to a material feeding direction. This will be described with reference to FIG. A flexible band-shaped insert c is attached between the stepping body b provided inside the sanding belt a for pressing the sanding belt a against the workpiece x and the sanding belt a. The structure is such that the amount of advance is freely adjustable from the right side edge to the left side edge of the workpiece x in FIG. While the guide e is used to adjust the right end of the treading body b, the interposed body c is advanced and its tip is aligned with the left edge of the workpiece x, so that the region where the treading force of the treading body b acts on the workpiece x Of the left and right side edges And summer to stop.

[0004]

By the way, when such a conventional apparatus is applied to a wide belt sander which circulates and runs a wide sanding belt in parallel with the material feeding direction, as described above, In order to align the right edge of the workpiece x with the right end of the tread body b, the workpiece x must be fixed to the right end of the feeding surface, and the amount of advance of the interposer c varies depending on the width of the workpiece x. However, only the right side of the sanding belt in the width direction is pressed against the workpiece x under the stepping force.

[0005] That is, since the sanding belt is partially reduced and its service life is shortened, it is inappropriate to use the conventional stepping device as it is for a wide belt sander. Development was urgently needed.

[0006]

The stepping device for a wide belt sander according to the present invention has been devised based on such a demand, and a work material is provided between a stepping body and a sanding belt. A pair of flexible band-shaped inserts, which extend from the left and right side edges toward the opposite side edge so that their tips overlap vertically, are respectively provided to freely adjust the amount of advance. The configuration was as follows.

[0007]

[Function] A pair of left and right inserts is advanced with the stepping body raised, and the tips of the right insert are placed on the left edge of the workpiece on the material feeding surface while their respective tips are vertically overlapped. Then, the left insert is fitted to the right edge of the workpiece.

[0008] With this arrangement, when the interposed member doubles and overlaps only between the widths of the workpiece, and when the treading body descends to press the sanding belt, the treading pressure acts. It is limited only to the width of the work piece, thereby preventing the left and right side edges of the work piece from sagging.

At this time, the mounting position of the workpiece on the material feeding surface is appropriately changed in the width direction, and the pair of interleaving bodies are overlapped and set as described above, so that the sanding belt is provided. The portion to which the tread pressure is applied changes in the width direction in accordance with the placement position of the workpiece, and the entire width of the sanding belt can be used.

[0010]

[Effect of the Invention] That is, according to the present invention, the working area of the tread pressure is set to the width of the work material by setting the tip ends of the pair of inserts in a double overlap so as to match the width of the work material. It is possible to prevent the end sagging of the left and right side edges of the work material only in the middle.

In addition, in response to changing the placement position of the workpiece on the material feeding surface in the width direction, the overlapping position of the interposed member, that is, the position receiving the stepping force of the sanding belt is determined by the width. Since the belt can be changed in the direction, the sanding belt can be used over its entire width to perform the grinding and polishing work, thereby preventing one-sided reduction and greatly extending its useful life.

Furthermore, since the insert itself is made of a flexible material, it can be wound around rollers, for example, on both the left and right sides of the material feeding surface when it is retracted.
There is an effect that the entire device can be reduced to a small width.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a main body frame, on which a workpiece x is placed on a material feeding belt 3 of a material feeding table 2 which is freely moved up and down on the main body frame 1, and a plurality of material feeding rollers 5 are provided. While being conveyed in the direction of the arrow while being pressed by the group, a wide endless sanding belt 6 having a ground surface formed thereon is provided between the front and rear drive rollers 7, 8 and the tension roller 9 above. And circulates in the direction of the arrow in parallel with the material feeding direction of the workpiece x.

A tread pad device A is provided above a horizontal traveling portion facing the material feeding surface of the sanding belt 6. As shown in detail in FIG. 2, this stepping pad device A has a lifting frame 12 on which a pad unit 13 described below is mounted on the lower surface of a horizontal treading substrate 11 fixed to the main body frame 1 as shown in FIG. The provided guide shaft 14 is fitted in a guide hole 15 formed in the treading board 11 so that the apparatus can be moved up and down freely.

As shown in FIG. 4, the pad unit 13 has an air bag 19 and an air bag 19 in a receiving groove 18 formed in a pad frame 17 which is elongated in a direction perpendicular to the material feeding direction of the workpiece X. A flexible plate 20, in which a number of parallel pins are sandwiched between upper and lower elastic plates at intervals, is housed in a vertically overlapping manner, and an opening on the lower surface is a pad cover 21.
The sanding belt 6 runs on the lower surface side of the pad cover 21.

As shown in FIG. 2, the stepping board 1 is mounted on the lifting frame 17 to which the pad unit 13 is attached.
1 the piston rod 24 of the lifting cylinder 23 attached to
The pad unit 13 is driven up and down by the downward movement of the piston rod 24 and the upward retreat.

The above-mentioned flexible plate 2 of the pad unit 13
On the lower surface of the pad unit 0, a pair of left and right insertion bodies 26, 27 are formed in openings 28, 2 formed in the left and right end surfaces of the pad unit 13.
9 to be inserted. Each insert 2
Each of the members 6 and 27 is formed in a strip shape using sponge, rubber, felt, or the like as a material, and has a structure in which a spring plate 30 is adhered to each one surface side.

On both sides of the pad unit 13, left and right magnet wheels 32 are fixed to output shafts of servo motors 33 mounted on the main body frame 1, respectively. , 27 are fixed to the outer periphery of the corresponding magnet wheel 32 by bolts 34, and the rotation of the magnet wheel 32 causes the left and right interposed bodies 26, 27 to rotate.
The spring plates 30 are slid in contact with each other so that their ends overlap vertically so that they can advance and retreat.

As shown in FIG. 1, the work piece x is located on the pad unit 13 in front of the work piece x in the feeding direction.
A sensor 36 for detecting the passage of the front end and the rear end of the pad unit 13 is provided, and the timing of lifting and lowering of the pad unit 13 is controlled based on the detection signal.

Next, the operation of this embodiment will be described. In the state where the piston rod 24 of the lifting cylinder 23 is retracted and the pad unit 13 is raised as shown in FIG.
When the workpiece x is placed on the front side of the material feeding belt 3 in the material feeding direction, each of the servo motors 33 is driven to rotate the magnet wheel 32 so that the left and right inserts 26 and 27 are advanced, respectively. , The tip of the right insert 27 is aligned with the left edge of the workpiece x, and the left insert 26 is aligned with the right edge of the workpiece x. As a result, the interposed bodies 26 and 27 overlap and correspond only to the width w of the workpiece x.

In this state, when the material feeding belt 3 is driven to feed the work material x, the front end of the work material x is detected by the sensor 36, and after a lapse of a predetermined time, the front end of the work unit x is returned to the pad unit 1.
3 and 4, when the piston rod 24 of the lifting cylinder 23 advances and the pad unit 13 descends, the sanding belt 6 is pressed against the workpiece x, as shown in FIGS. When a certain period of time has passed since the rear end of the sensor unit x was detected by the sensor 36, the pad unit 1 was immediately below the pad unit 13 and the pad unit 1
3, the stepping pressure is released, and the workpiece x is subjected to polishing and grinding without causing sagging and back sagging. The pad unit 13 descends to press the sanding belt 6. In such a case, as described above, the pair of insertion bodies 26 and 27 are formed between the width w of the workpiece x.
Since only the width is inserted between the widths w of the workpiece x, the treading pressure acts only on the width w of the workpiece x. End drooping is prevented.

Then, the mounting position of the workpiece x on the material feeding belt 3 is appropriately changed in the width direction, and the pair of insertion bodies 26 and 27 are set in an overlapping manner as described above. The portion of the sanding belt 6 to which the stepping force is applied changes in the width direction in accordance with the mounting position of the workpiece x, so that the polishing and grinding can be performed using the entire width of the sanding belt 6.

When the two inserts 26 and 27 are retracted, the spring plate 30 can be wound up and accommodated on the outer periphery of the magnet wheel 32 while being attracted by magnetic force.
The entire device is compacted.

As shown in FIG. 5, a three-layer structure in which a fixed interposed body 38 is further provided on the lower surface of the left and right movable interposed bodies 26 and 27 may be used, so that the stepping pressure region can be more clearly defined. The function of preventing left and right end drooping is further exhibited.

[Brief description of the drawings]

FIG. 1 is a front view showing the entire structure of a wide belt sander.

FIG. 2 is a sectional view of a state before processing according to an embodiment of the present invention.

FIG. 3 is a sectional view showing a state during the processing.

FIG. 4 is an enlarged sectional view taken along line XX of FIG. 3;

FIG. 5 is a partial sectional view of another embodiment.

FIG. 6 is an explanatory diagram of a conventional example.

[Explanation of symbols]

x: Work material 2: Feeding table 3: Feeding belt
6: Sanding belt 7, 8, 9: Roller 13: Pad unit 23: Elevating cylinder 26, 27: Insert body 28, 29: Opening
30: Spring plate 32: Magnet wheel 33: Servo motor

Claims (1)

(57) [Scope of request for utility model registration] 1. An endless sanding which is wrapped around rollers and circulates and runs parallel to a running direction of a workpiece above a material feeding apparatus which transports the workpiece in one direction on a feeding surface. A wide belt having a belt disposed therein, and a stepping body having elasticity for pressing the sanding belt against a workpiece is provided inside a horizontal traveling portion facing the material feeding surface of the sanding belt so as to be vertically movable. In the stepping device of a sander, between the stepping body and the sanding belt, a pair of protrudes from the left and right side edges of the workpiece toward the opposite side edge so that their tips overlap vertically. A stepping device for a wide belt sander, wherein flexible band-shaped inserts are provided so as to freely adjust the amount of advance.