JPH0742601Y2 - 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 front 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, as a dust collecting device for collecting chips generated by sanding processing, for example, Japanese Utility Model Publication No. 47-32713.
Those disclosed in Japanese Patent Publication No. 63-27969 and Japanese Utility Model Publication No. 63-27969 are known. This is shown schematically in FIG.
A dust suction duct 2 connected to the suction side of a dust collection fan device (not shown) is provided on the front side of the grinding region by the sanding belt 1 (the work entry side), and the chips are sucked into the dust suction duct 2 together with the ambient air. In this structure, the work W is placed on the material feeding belt 4 on the processing table 3 and conveyed in the arrow A direction, and the sanding belt 1 travels in the arrow B direction.

[0005]

However, the above configuration has a drawback that there is a limit to the improvement of the dust collection efficiency.
That is, when the dust suction duct 2 is disposed close to the work W in order to improve the dust collection efficiency, the air is locally strongly sucked, so that the periphery of the tip of the dust suction duct 2 is in a vacuum state and the air is sufficiently strong. The flow is not generated, and rather the chips cannot be removed sufficiently. On the contrary, if the dust suction duct 2 is disposed away from the work W, the force of the air flow around the location where the chips are generated is weakened, so that the chips cannot be sufficiently removed. is there.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a sanding machine capable of generating a strong air flow around a location where chips are generated and enhancing dust collection efficiency. It is in the area of providing a dust collector.

[0007]

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 into a grinding area by a grinding mechanism. Together with the one in which a dust suction duct for sucking chips generated along with the grinding of the work together with the surrounding air is arranged on the work entry side of the grinding area, with forming a large number of vent holes in the material feeding belt, The processing table is characterized in that an air supply port is formed at a position corresponding to the intake portion of the dust suction duct.

[0008]

Function During the grinding of the work, the airflow flowing along the surface side of the work and the material feeding belt flows into the intake portion of the dust suction duct. Further, in the above-mentioned means, in addition to this, an air flow is generated from the back surface side of the processing table, which flows through the air supply port of the processing table and the ventilation hole of the material feeding belt in order to flow into the dust suction duct. Therefore, a large amount of air is sucked into the dust suction duct, so that the vicinity of the tip of the dust suction duct is prevented from falling into a vacuum state, and a sufficient amount of air flow is used to discharge the chips.

[0009]

As described above, according to the dust collector of the present invention,
Since a large amount of air flow that flows into the dust collection duct is generated, the excellent effect that the chips can be discharged by being multiplied and the dust collection efficiency can be sufficiently increased is obtained.

[0010]

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 the 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 of the grinding area (front side of the sanding roll 53), 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 vertically as well, and the upper portion thereof is provided on 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 provided in this order 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 openably and closably attached to the front surface of the housing 100.

<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 vent 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, on the processing table 13, as shown in FIGS. 1 and 2, the intake portion of the dust suction duct 57,
That is, a slit-shaped front air supply port 18 is formed at a position directly below the open end of the guide duct 58, and a slit-shaped rear air supply port 19 is also formed at a position corresponding to the dust collecting hopper 59. Has been formed.

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 related devices such as a dust collecting fan and a 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 the pressure chambers 20, 21 connected to the front air supply port 18 are formed.
Air is forcibly supplied from the turbo blower device.
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.

Therefore, unlike the conventional structure, the surroundings of the work W are not in a vacuum state, and a strong air flow toward the inside of the guide duct 58 is generated here, and the chips are efficiently ground in the grinding area. Will be discharged from. At this time, in the part of the material feeding belt 11 on which the work W is placed, the air holes 17 are blocked by the work W itself.
It will be ejected from the vent holes 17 on both side portions of No. 1 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.

Next, when the work W has been ground and reached the 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 air supply port are fed. A strong airflow that flows through the ventilation holes 17 of the material belt 11 and flows straight into the upper dust collecting hopper 59 is generated.
As a result, in this type of sanding machine, even if there is a situation in which cutting chips are easily solidified and adhere to the rear end portion of the work W in an eaves-like shape, in this embodiment, the chips are blown away by a strong air flow. Therefore, the chips can be more reliably removed from the work.

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, whereby the chips adhere to the surface. 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 front air supply port 18 is formed in the processing table 13, the air ejected from the front air supply port 18 is The material feed belt 11 penetrates and flows toward the dust suction duct 57 side. For this reason, not only the upper surface of the work W, but also the air flow toward the inside of the guide duct 58 is generated not only on the upper side but also on the both sides and the rear side of the work W, and the air around the work W is enclosed in the vacuum state. Therefore, the chips can be efficiently discharged in front of the grinding area.

In the rear of the grinding area, since the rear air supply port 19 is formed in the processing table 13, the air flow supplied from the rear air supply port 19 can be multiplied to remove the chips at the rear edge of the work W. Since the adhesive rubber roll 61 is provided behind the rotating brush 60, the chips on the surface of the work W can be sufficiently removed, and the chip removing function is greatly improved as a whole.

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, the air naturally flows from the air supply port by using the negative pressure on the dust suction duct 57 side without necessarily providing the blower. It may be configured to be supplied.

(3) In the above embodiment, the rear air supply port 19 is formed in the working table 13 also behind 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 structure 1 and the front air supply port 18 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 cross-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 (air supply port) 19 ... Rear air supply port 50 ... Grinding mechanism 54 ... Sanding belt 57 ... Dust suction duct 58 ... Guide Duct (intake part) 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 material feeding belt is used to feed a work into a grinding area by a grinding mechanism, and at the same time as the work is ground on the work entry side of the grinding area. In one in which a dust suction duct for sucking generated chips together with ambient air is arranged, a large number of vent holes are formed in the material feeding belt, and the machining table corresponds to an air intake portion of the dust suction duct. A dust collector for a sanding machine, which has an air supply port formed at the position.