JPH0742602Y2 - Dust collector for sanding machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanding machine for grinding a surface of wood or resin, and to a dust collecting apparatus having an improved chip collecting structure on the rear side of the grinding area.

[0002]

2. Description of the Related Art As a sanding machine used for grinding woodwork materials, resin materials, etc., for example, the following wide belt sanders are known.

An endless sanding belt is laid between the rolls on the upper part of the main frame, and a drive motor for running the sanding belt is provided to form a grinding mechanism. On the other hand, under the main frame, an endless material feeding belt is laid between the rolls on the processing table, and the work placed on this is fed so as to pass through the grinding area below the sanding belt.

In this type of belt sander, for example, the following structure is known as a dust collecting device for collecting the chips generated by sanding. This is provided with a dust suction duct on the front side of the grinding area by the sanding belt (work entry side), and a dust collecting hopper on the rear side of the grinding area (work discharge side).
The dust collecting duct and the dust collecting hopper are connected to the suction side of the dust collecting fan device to suck the chips together with the air on both sides of the grinding area of the work.

[0005]

By the way, when the sanding belt is used for grinding, the cutting chips are scattered around the work, but most of them are removed by being multiplied by the air flow sucked into the dust suction duct or the dust collecting hopper. However, for example, in FIG.
As shown in FIG.
When grinding the work W by the sanding belt 2 which is conveyed in the direction of arrow B and travels in the direction of the arrow B, chips adhere to the rear end of the work W as shown in the figure, and a deposit C of chips is formed.
Will be caused.

After cutting the work W, it is common to rub the surface of the work W with a rotating brush to remove the adhering chips. It is difficult to remove the deposit C adhering to the rear edge portion because only the rubbing is performed. Therefore, the deposit C needs to be removed by hand one by one, which has been a cause of lowering productivity.

Therefore, an object of the present invention is to provide a dust collecting apparatus for a sanding machine which can efficiently remove the chips adhering to the side edges of the work and can efficiently perform the chip removal operation. Where it is.

[0008]

A dust collecting apparatus for a sanding machine according to the present invention is provided with a material feeding belt so as to move in contact with a processing table, and the material feeding belt feeds a work to a grinding area by a grinding mechanism. Along with the dust discharge hopper for sucking the chips generated by the grinding of the work together with the surrounding air on the work discharge side of the grinding area, a large number of vent holes are formed in the material feeding belt. The processing table is characterized in that an air supply port is formed at a position corresponding to the dust collecting hopper.

[0009]

The air flows into the dust collecting hopper from the back side of the processing table through the air supply port and the ventilation holes of the material feeding belt in order, and a strong air flow passing through the material feeding belt is generated. Therefore, even if chips adhere to the side edges of the work, when the ground work is placed on the material feeding belt and passes near the dust collecting hopper, the chips are directed toward the dust collecting hopper. It is blown away by the flowing air flow and is sucked into the dust collecting hopper.

[0010]

As described above, according to the dust collector of the present invention,
A strong airflow that penetrates the material feeding belt and flows into the dust collecting hopper is generated.This makes it possible to blow off the chips on the side edge of the workpiece and simplify the work of removing chips. Produce the effect.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 3, the overall structure is such that a grinding mechanism 50 is provided above the work transfer mechanism 10 and these are connected and integrated by a housing 100. The belt 11 is provided so as to extend in the left-right direction in FIG.

<Grinding Mechanism> First, the grinding mechanism 50 will be described.

Inside the housing 100, a drive roll 51 is provided on the upper portion and a guide roll 52 is provided on the lower portion.
And a sanding roll 53 is provided, and an endless sanding belt 54 is stretched between them.
The drive roll 51 is driven by a motor (not shown), which causes the sanding belt 54 to move.
Travels in the direction of arrow B, which is the opposite direction of the traveling direction (direction of arrow A in the figure), whereby the work is ground in the grinding region between the guide roll 52 and the sanding roll 53.

Guide rolls 52 arranged under the grinding mechanism 50
An air cushion type tread pad 55 is provided between the sanding roll 53. It is located on the back side of the sanding belt 54 and has a function of urging the sanding belt 54 downward.

A plurality of pressing rolls 56 are provided on both left and right sides of the guide roll 52 and the sanding roll 53, and although not shown, their pivots are supported so as to be vertically movable, and are attached downward by a compression coil spring. It is energized.

As shown in FIG. 1, a dust suction duct 57 extends vertically and is arranged on the work entry side (front side of the sanding roll 53) in the grinding region, and the upper portion thereof is provided with the housing 1
00 is connected to the suction side of a dust collecting fan (not shown). A guide duct 58 is connected to the lower end of the dust suction duct 57, and its tip is inserted between the sanding roll 53 and the pressing roll 56 adjacent to the sanding roll 53 and opens toward the sanding roll 53 side.
The guide duct 58 has a width dimension wider than the lateral width of the sanding belt 54 and opens in a thin slit shape.

On the other hand, on the work discharge side of the grinding area (that is, on the rear side of the guide roll 52), a dust collecting hopper 59 is arranged so as to extend in the vertical direction, and the upper part thereof is provided with the housing 1
00, is connected to the suction side of a dust collecting fan (not shown), and its lower end spreads toward the end and opens above the two pressing rolls 56. Further, the lower end opening of the dust collecting hopper 59 also has a width dimension wider than the lateral width of the sanding belt 54.

A rotary brush 60 and a rubber roll 61 are sequentially provided on the left side of the drawing, which is the discharge side of the work. The rotary brush 60 has a function of being driven by a motor (not shown) to remove the chips adhering to the surface of the work, and the rubber roll 61 has adhesiveness on the surface and is driven to rotate in contact with the surface of the work. It has a function of adhering and removing the chips of the work surface to the rubber roll 61 side.

An inspection door 62 is attached to the front surface of the housing 100 so as to be openable and closable.

<Work Transfer Device> Next, the work transfer device 10 will be described. This is the processing table 13 on the upper part of the base 12 installed on the floor.
Is configured to be movable up and down by the lifting device 14. Rolls 15 are provided at both ends of the processing table 13, and the material feeding belt 11 is stretched between the rolls 15 so as to come into contact with and move on the processing table 13.

The elevating device 14 is operated by turning on an operation switch (not shown) or by rotating the operation handle 16, whereby the processing table 13 is moved up and down and the feeding belt 11 and the sanding belt 54 are moved. The gap size can be set to a desired value.

Further, as shown in FIG. 1, a large number of ventilation holes 17 are formed in the material feeding belt 11 so as to penetrate the front and back surfaces thereof. By the way, in this embodiment, the width dimension of the material feeding belt 11 is about 70 cm, and the diameter of the ventilation hole 17 is about 5 mm.

On the other hand, as shown in FIGS. 1 and 2, the machining table 13 has a slit-like pre-feed at a position immediately below the tip of the dust collection duct 57, that is, the opening end of the guide duct 58. An air vent 18 is formed, and a slit-shaped rear air supply port 19 is also formed at a position corresponding to the dust collecting hopper 59.

On the back side of the processing table 13,
The vertical wall plate 13a is formed at the position where the air supply ports 18 and 19 are formed.
Pressure chamber 2 composed of lateral wall plate 13b and bottom wall plate 13c
0 and 21 are formed, and the air supply ports 18 and 19 are connected to the pressure chambers 20 and 21, respectively.
The pressure chambers 20 and 21 are connected to a turbo blower device (not shown) via ducts 22 and 23, for example, pressure air generated by a motor having an output of 1.5 kw is sent to the pressure chambers 20 and 21. Each air supply port 18,
It is designed to eject from 19 upwards.

Next, the operation of this embodiment will be described.

First, the lifting device provided in the work transfer device 10.
The table 14 is operated to move the processing table 13 to the required height. This height is determined in consideration of the thickness of the work and the necessary "cutting margin", and can be set while looking at a known gauge (not shown).

After that, the work transfer device 10 and the related devices such as the dust collecting fan and the turbo blower device are activated,
The work to be ground is placed on the material feeding belt 11 and the grinding mechanism 5
Send below 0. Then, the work passes through the grinding area between the guide roll 52 and the sanding roll 53 of the grinding mechanism 50, and the surface of the work is rubbed by the sanding belt 54, so that the work is ground.

When such grinding is performed, a large amount of chips are generated around the grinding area. In particular, since the sanding belt 54 runs to the right side in FIG. 1 in the grinding area, the chips are blown toward the right side of the sanding belt 54.

On the right side of the sanding belt 54, however, the guide duct 58 of the dust suction duct 57 is open,
Since air is sucked into the opening of the guide duct 58 by the operation of the dust collecting fan, the cutting dust is sucked into the guide duct 58 by the air flow and discharged from the cutting region. In this case, the air sucked into the guide duct 58 is
Not only those flowing along the upper surface of the material feeding belt 11 or the work W, but also those flowing from the back surface side of the processing table 13 are added. That is, in this embodiment, the ventilation hole 17 is formed in the material feeding belt 11, the front air supply port 18 is formed in the processing table 13, and air is supplied from the turbo blower device to the pressure chambers 20 and 21 connected to the air supply port 18. It is forcibly supplied. Therefore, the air ejected from the front air supply port 18 of the processing table 13 penetrates the ventilation holes 17 of the material feeding belt 11 from the bottom to the top, and is sucked into the guide duct 58 while flowing around the work W. become.

At this time, in the portion of the material feeding belt 11 on which the work W is placed, the air holes 17 are closed by the work W itself, so the air from the processing table 13 side is fed by the material feeding belt. It will be ejected from the vent holes 17 in both side portions of 11 which are not blocked by the work W. Therefore, the air from the processing table 13 side is sucked into the guide duct 58 while wrapping around the work W on both sides and rearward, and eventually the air flow is generated all over the periphery of the work W. The chips in front of the grinding area are smoothly discharged.

Now, when the work W is ground and reaches a position where it is separated from the grinding area, as soon as the rear end of the work W passes through the rear air supply port 19, the rear air supply port 19 and the material feeding member are fed. A strong airflow is generated which flows through the ventilation holes 17 of the belt 11 and linearly flows into the upper dust collecting hopper 59 as shown by an arrow X in FIG. As a result, in this type of sanding machine, even if there is a situation in which the chips are easily solidified in the eaves-like shape at the trailing edge of the work W to generate the deposit C, the deposit C of the chip is used in the present embodiment. Can be blown away by a strong air flow, and this can be sucked into the dust collecting hopper 59. As a result, it becomes unnecessary to manually remove the chips adhering to the trailing edge of the work W one by one, and the chip removal work becomes extremely simple.

The chips adhering to the surface of the work W are removed by the rotating brush 60, and the adhesive rubber roll 61 rolls on the surface of the work W to adhere the chips thereto. The work W is completely removed.

As described above, according to this embodiment, since the ventilation hole 17 is formed in the material feeding belt 11 and the rear air supply port 19 is formed in the processing table 13, the air blown out from the air supply port 19 is sent. A strong airflow is generated which penetrates the material belt 11 and flows toward the dust collecting hopper 59. For this reason, the deposit of chips adhering to the trailing edge of the work W can be blown away by the air flow, and the work of removing the chips from the work W is extremely simple and the productivity is improved.

The present invention is not limited to the embodiments described above and shown in the drawings, but the following modifications are possible.

(1) In the above embodiment, the endless sanding belt 54 is made to run and grind.
The present invention is not limited to this, and can be applied to, for example, a sanding machine equipped with a grinding mechanism having a structure in which grinding paper is wound around a sanding roll.

(2) In the above embodiment, the processing table 13
Although the pressure chambers 20 and 21 are provided on the back surface of the air blower and air is sent from the blower here, it is possible to use the negative pressure on the side of the dust collecting hopper 59 to allow the air to naturally flow even if the blower is not necessarily provided. It may be configured to be supplied to.

(3) In the above embodiment, the front air supply port 18 is formed in the working table 13 also in front of the grinding area, and
Although the rubber roll 61 is provided at the rear of the rotating brush 60, it is not always necessary to provide these, but the material feeding belt 1
The intended purpose can be achieved even if the ventilation hole 17 is formed in the first unit 1 and the rear air supply port 19 is provided in the processing table 13.

Besides, the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be carried out without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a plan view of the processing table.

[Fig. 3] Overall front view

FIG. 4 is a partial vertical sectional view for explaining the operation of the present invention.

FIG. 5 is a partial vertical sectional view for explaining a conventional defect.

[Explanation of symbols]

 10 ... Work transfer mechanism 11 ... Material feeding belt 13 ... Processing table 17 ... Vent hole 18 ... Front air supply port 19 ... Rear air supply port (air supply port) 50 ... Grinding mechanism 54 ... Sanding belt 59 ... Dust collecting hopper W ... work

Claims (1)

[Scope of utility model registration request] 1. A material feeding belt is provided so as to move in contact with a processing table, the workpiece is fed into a grinding area by a grinding mechanism by the material feeding belt, and the workpiece is discharged to the grinding area along with the grinding of the workpiece. In one in which a dust collecting hopper for sucking generated chips together with ambient air is arranged, a plurality of ventilation holes are formed in the material feeding belt, and a position corresponding to the dust collecting hopper is formed on the processing table. A dust collecting device for a sanding machine, which is characterized in that an air supply port is formed in the.