JPH0526256U - Dust collector for sanding machines - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the chip discharge efficiency in front of the grinding area. A dust suction duct 57 is arranged to extend vertically on the work entry side (front side of the sanding roll 53) in the grinding area, and the upper portion thereof is connected to the suction side of the dust collection fan.
A guide duct 58 is connected to the lower end. A large number of ventilation holes 17 are formed in the material feeding belt 11 so as to penetrate the front and back. A slit-shaped front air supply port 18 is formed on the processing table 13 so as to correspond to the open end of the guide duct 58.
Further, a pressure chamber 20 is formed on the rear surface side of the processing table 13 at the position where the air supply port 18 is formed, and pressurized air is supplied to this chamber. As a result, a strong airflow is generated around the work W toward the inside of the guide duct 58.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sanding machine that grinds the surface of wood or resin, and to a dust collecting device having an improved chip dust collecting structure on the front side of the grinding area.

[0002]

[Prior Art]

 The following wide belt sanders are known as sanding machines used for grinding woodwork and resin materials.

An endless sanding belt is laid over the upper part of the main frame between the rolls, and a grinding motor is provided by providing a drive motor for running the sanding belt. On the other hand, at the bottom of the main frame, an endless 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 collector for collecting chips generated by sanding, for example, Japanese Utility Model Publication No. 47-32713 and Japanese Utility Model Publication No. 63-27969 are disclosed. This is known. As shown schematically in FIG. 4, this is provided with a dust suction duct 2 connected to the suction side of a dust collecting fan device (not shown) on the front side of the grinding area by the sanding belt 1 (the side where the work enters), and cuts chips. The air is sucked into the dust suction duct 2 together with the ambient air. In this configuration, 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]

[Problems to be solved by the device]

 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 arranged 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 on the contrary, the chips cannot be removed sufficiently. On the contrary, if the dust suction duct 2 is arranged away from the work W, the force of the air flow around the place where the chips are generated is weakened, so that the chips cannot be sufficiently removed. It ends up.

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

[0007]

[Means for Solving the Problems]

 The dust collecting device of the sanding machine according to the present invention is provided with a material feeding belt so as to move in contact with the processing table, and the material feeding belt feeds the work into the grinding area by the grinding mechanism, and at the same time, the work in the grinding area. In a machine with a dust suction duct for sucking chips generated along with the grinding of the work together with the surrounding air on the entrance side, a large number of ventilation holes are formed in the material feeding belt and dust is collected in the processing table. The feature is that the air supply port is formed at a position corresponding to the intake portion of the duct.

[0008]

[Action]

 During the grinding of the work, the airflow that flows along the surface side of the work and the material feeding belt flows into the intake part 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 working table to sequentially flow through the air supply port of the working table and the ventilation hole of the material feeding belt to flow into the dust suction duct. Therefore, since a large amount of air is sucked into the dust suction duct, 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]

[Effect of the device]

 As described above, according to the dust collector of the present invention, since a large amount of airflow that flows into the dust collection duct is generated, the dust can be discharged by multiplying the airflow, and the dust collection efficiency can be sufficiently increased. It has an excellent effect.

[0010]

【Example】

 An embodiment of 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 material 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 in the upper part, and a guide roll 52 and a sanding roll 53 are provided in the lower part, 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 travel in the direction of arrow B, which is the direction opposite to the traveling direction of the material feeding belt 11 (direction of arrow A in the figure). As a result, the work is ground in the grinding area between the guide roll 52 and the sanding roll 53.

An air cushion type tread pad 55 is provided between the guide roll 52 and the sanding roll 53 which are arranged below the grinding mechanism 50. 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 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 movable up and down, and downward by a compression coil spring. Being 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 area, and the upper portion thereof is drawn out upward from the housing 100 to be illustrated. Not connected to the suction side of the dust collection fan. A guide duct 58 is connected to the lower end of the dust suction duct 57, and the tip of the guide duct 58 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 workpiece discharge side of the grinding area (that is, on the rear side of the guide roll 52), a dust collecting hopper 59 is also arranged so as to extend vertically, and an upper portion thereof is drawn out upward from the housing 100 and is shown in the drawing. It is connected to the suction side of the dust collecting fan, and the lower end of the dust collecting fan widens 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 roller 61 are sequentially provided on the left side of the drawing, which is the discharge side of the work. The rotating 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 and is driven to rotate in contact with the surface of the work. Therefore, it has a function of adhering the cutting chips on the surface of the work to the rubber roll 61 side to remove it.

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 a structure in which a processing table 13 is vertically movable by an elevating mechanism 14 above a base 12 that is installed on the floor. Rolls 15 are provided at both ends of the working 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 working table 13.

The elevating device 14 is operated by turning on an operation switch (not shown) or by rotating the operation handle 16, which causes the processing table 13 to move up and down to move the feeding belt 11 and the sanding belt 54. 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 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 shape at a position directly below the intake portion of the dust suction duct 57, that is, corresponding to the open end of the guide duct 58. The front air supply port 18 is formed, and the slit-shaped rear air supply port 19 is also formed at a position corresponding to the dust collecting hopper 59.

Then, on the back surface side of the processing table 13, pressure chambers 20 and 21 composed of a vertical wall plate 13a, a horizontal wall plate 13b and a bottom wall plate 13c are formed at the positions where the respective air supply ports 18 and 19 are formed. 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, and the pressure air generated by, for example, a motor having an output of 1.5 kw is sent to the pressure chambers 20 and 21. This is to be jetted upward from each air supply port 18, 19.

Next, the operation of this embodiment will be described.

First, the elevating mechanism 14 provided in the work transfer device 10 is operated to move the processing table 13 to a desired 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 conveying device 10 and the associated devices such as the dust collecting fan and the turbo blower device are activated, and the work to be ground is placed on the material feeding belt 11 and fed below the grinding mechanism 50. 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.

However, since the guide duct 58 of the dust suction duct 57 is open on the right side of the sanding belt 54, and the air is sucked into the opening of the guide duct 58 by the operation of the dust collecting fan, the air flow is increased. The cutting chips are sucked into the guide duct 58 and discharged from the cutting area. In this case, the air sucked into the guide duct 58 not only flows along the upper surface of the material feeding belt 11 or the work W, but also flows in from the back surface side of the processing table 13. 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 and 21 connected to the front air supply port 18 are connected to the turbo blower device. Air 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. Will be.

Therefore, unlike the conventional structure, the circumference of the work W does not become 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. It will be discharged from the area. At this time, in the portion of the material feeding belt 11 on which the work W is placed, the air holes 17 are blocked by the work W itself. Of the above, it is jetted from the vent holes 17 on both side portions thereof 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 in the entire circumference of the work W. As a result, the chips in front of the grinding area are smoothly discharged.

Next, when the work W has been ground and reaches a position where it is separated from the grinding region, 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 is generated which flows through the ventilation holes 17 of the material belt 11 and linearly flows into the upper dust collecting hopper 59. As a result, in this type of sanding machine, even if there is a situation in which chips tend to harden and adhere to the rear end of the work W in the form of eaves, 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, so that the chips adhere to it. Then, 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 blown out from the front air supply port 18 is formed. Will pass through the material feeding belt 11 and flow 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 surface but also on the both sides and the rear of the work W, and the air around the work W is surrounded by the vacuum. Since it is prevented from falling into a state, chips can be efficiently discharged in front of the grinding area.

Further, since the rear air supply port 19 is formed in the working table 13 in the rear of the grinding region, the air flow supplied from the rear air supply port 19 can be used 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, and the following modifications are possible, for example.

(1) In the above embodiment, the endless sanding belt 54 is made to run and grind. However, the present invention is not limited to this. For example, a sanding provided with a grinding mechanism in which grinding paper is wrapped around a sanding roll. It can also be applied to machines.

(2) In the above-described embodiment, the pressure chambers 20 and 21 are provided on the back surface of the processing table 13, and the air is sent from the blower here. Air may be naturally supplied from the air supply port by using negative pressure.

(3) In the above embodiment, the rear air supply port 19 is formed in the working table 13 also in the rear of the grinding area, and the rubber roll 61 is provided in the rear of the rotary brush 60, but these are not always provided. Even if the ventilation hole 17 is formed in the material feeding belt 11 and the processing table 13 is only provided with the front air supply port 18, the intended purpose can be achieved.

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 a processing table.

FIG. 3 is an 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 region by a grinding mechanism, and at the same time as the work is ground on the work entry side of the grinding region. In the one in which a dust suction duct for sucking the generated chips together with the surrounding air is arranged, a large number of ventilation holes are formed in the material feeding belt, and the machining table corresponds to the suction portion of the dust suction duct. A dust collector for a sanding machine, which has an air supply port formed at the position.