JP2622070B2 - Sanding machine dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[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 more particularly to a dust collecting device having an improved structure for collecting chips generated in the sanding area.

[0002]

2. Description of the Related Art There is, for example, a wide belt sander as a sanding machine used for polishing / grinding wood materials, resin materials and the like. As a general structure, a work transport mechanism is constructed by extending an endless feeding belt between multiple rolls under the main frame, and an endless sanding belt is stretched between the rolls above the main frame. 2. Description of the Related Art There is known a structure in which a sanding mechanism that forms a sanding area is provided on a work transfer surface. In such a sanding machine, when a work enters a sanding area, the upper surface of the work is polished and ground by a sanding belt that runs while being pressed by a tread pad.

In this type of belt sander, a dust collecting mechanism is provided in order to prevent a large amount of chips generated during sanding from scattering around. The following is an example of the dust collecting mechanism. This is because, for example, when the sanding belt travels in the work entry direction opposite to the work conveyance direction, a dust suction duct is provided on the work entry side of the sanding area, and the chips shaved off by the sanding belt flow into the dust suction duct. It sucks with the flow.

[0004]

However, it is impossible for the dust suction duct to suck all of the chips generated in the sanding area, and some of the chips are not sucked by the dust suction duct and are not sucked into the sanding area. There is a problem that it is unavoidable to escape to the side or the work discharge side and float around the sanding machine.

The present invention has been made in view of the above circumstances, and reliably sucks chips generated in a sanding area, and the chips leak to the outside of the sanding machine, thereby deteriorating the working environment. It is intended to prevent the situation.

[0006]

According to a first aspect of the present invention, there is provided a sanding mechanism for polishing / grinding a work, and a sanding mechanism for placing the work on a transfer surface. And a work transfer mechanism for feeding the work into a sanding area by a mechanism.A dust suction duct that opens in a frame shape surrounding the sanding area above the transfer surface is provided, and sanding is performed on a frame-shaped area of the transfer surface corresponding to the dust suction duct. It is characterized in that a ventilation hole surrounding the region is provided.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the compressed air is supplied to the vent.

According to a third aspect of the present invention, in the first or second aspect of the invention, the area of the conveying surface surrounded by the vent is constituted by a belt conveyor having a material feeding belt stretched between rolls. The present invention is characterized in that a tension roll for tensioning the feeding belt is provided so as to be movable in a direction intersecting the direction in which the feeding belt is stretched.

[0009]

In the invention according to the first aspect, an air curtain surrounding the sanding area is generated by the airflow flowing into the dust suction duct from the ventilation port. The chips generated in the sanding area are prevented from flowing out of the sanding area by the air curtain, and are taken into the dust suction duct by multiplying by the air flow of the air curtain.

According to the second aspect of the present invention, since the compressed air is discharged from the vent, the flow of the air flow of the air curtain is strong, and the outflow of the chips to the outside of the sanding region is reliably prevented and the cutting is performed. The dust is efficiently absorbed.

According to the third aspect of the present invention, the adjustment of the tension of the material feeding belt for preventing the slack of the conveying surface in the sanding area is performed not by the movement of the position of the rolls spaced apart on the conveying surface. This is performed by moving the tension roll in a direction intersecting the direction in which the material feeding belt is stretched.

[0012]

As described above, according to the present invention, since the chips generated in the sanding region are prevented from flowing out of the sanding region by the air curtain, the chips are prevented from being generated. An excellent effect of preventing the working environment from deteriorating due to the outflow to the outside of the sanding area is achieved.

[0013] In particular, according to the second aspect of the present invention, since the momentum of the air flow constituting the air curtain becomes strong,
An excellent effect is achieved in that the chips can be reliably prevented from flowing out of the sanding area even when the scattering of chips generated in the sanding area is strong.

Further, according to the third aspect of the present invention, the tension of the material feeding belt is adjusted not by moving the rolls spaced apart on the conveying surface, but by stretching the tension roll over the material feeding belt. Since it is performed by moving in the direction intersecting the direction, even if the belt conveyor is provided within a limited range of the sanding area,
There is an excellent effect that the conveying surface of the belt conveyor in the sanding area can be kept in a tension state.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

The entire structure includes a work transport mechanism 10, a sanding mechanism 30, and a dust collecting mechanism 50.

<Work Transfer Mechanism 10> First, the work transfer mechanism 10 will be described. The lower frame 12, which is installed on the floor and has a partially open upper surface, has a work entry end (right position in FIG. 1) and a work discharge end (FIG.
A plurality of material feed rolls 13 which are driven in parallel by a drive mechanism (not shown) are provided in parallel at the left side of FIG.

A belt for transporting a work (not shown) in the direction of arrow X in FIG. 1 between these left and right material rolls 13 (the center position in FIG. 1) constitutes a transport surface together with these material rolls 13. A conveyor 15 is provided. The belt conveyor 15 is rotatably supported by a support 20 protruding in a cantilevered state from the inner periphery of the opening of the lower frame 12 and is driven by a drive mechanism (not shown). An endless material feeding belt 18 is stretched between a driven roll 17 on the workpiece entry side rotatably supported by the body 20. A support 2 is provided at a lower position between the driving roll 16 and the driven roll 17.
A tension roll 19 rotatably supported at 0 is provided so as to be vertically displaceable by an adjustment mechanism (not shown), and the tension of the material feeding belt 18 can be adjusted by displacing the position of the tension roll 19. I can do it.

<Sanding Mechanism 30> Next, the sanding mechanism 30 will be described.

Above the work transfer mechanism 10, an upper frame 31 having a partially open lower surface is provided with a guide rod by an elevating device (not shown) which is operated by turning on an operation switch or rotating an operation handle 31. 32
It is provided to be able to ascend and descend along. The sanding mechanism 30 moves up and down by the operation of the elevating device, so that the distance between a sanding belt 38 described later and the material feeding belt 18 of the work transfer mechanism 10 can be set to a desired size.

In the upper frame 31, a driving roll 3 rotatably driven by a motor (not shown) is provided at an upper position thereof.
4, and a guide roll 35 located on the workpiece discharge side and a sanding roll 36 located on the workpiece entry side along the lower surface of the upper frame 31 are cantilevered from the inner periphery of the opening of the upper frame 31. An endless sanding belt 38 is supported between the supporting members 37 so as to be freely rotatable. An air cushion type tread pad 39 is provided between the guide roll 35 and the sanding roll 36 to form the sanding belt 3.
The sanding belt 38 is urged downward (toward the work side) by the treading pad 39.

Guide roll 35 and sanding roll 36
A sanding area S corresponding to the transfer surface of the belt conveyor 15 of the work transfer mechanism 10 is formed between the sanding area S and the sanding belt 38. It travels in the Y direction, whereby the work is ground or polished while being sandwiched between the sanding belt 38 and the material feeding belt 18. <Dust Collection Mechanism 50> Next, the dust collection mechanism 50 will be described.

In the upper frame 31, there is a rectangular shape surrounding the sanding area S from four sides outside the both edges of the sanding belt 38 in the sanding area S and the work discharge side of the guide roll 35 of the sanding mechanism 30 and the work entry side of the sanding roll 36. A frame-shaped dust suction duct 51 is provided. The upper portion of the dust suction duct 51 is led upward from the upper frame 31 and is connected to a suction side of a dust collection fan (not shown). Further, the suction port 52 at the lower end of the dust suction duct 51 has a tapered cross-section that expands inward and outward in the sanding area S, and is largely open downward.

In the suction port 52 of the dust suction duct 51, the work discharge side of the guide roll 35 and the sanding roll 36 are provided.
The press rolls 53 are provided on the work entry side of the work, and these press rolls 53 are vertically movably supported by being urged downward by a compression coil spring (not shown).

In the portion along one edge outside of the sanding belt 38, two thin arms 37a, 37a for cantileverly fixing the support 37 supporting the sanding mechanism 30 to the upper frame 31 are passed. For this reason, the dust suction duct 51 is divided at a small interval at that portion, and the portion between the arms 37a, 37a is a separate thin dust suction duct 51a.

On the other hand, in the lower frame 12, there is a gap between the belt conveyor 15 of the work transfer mechanism 10 and the material feed roll row 13 on the work entry side, and the belt conveyor 15 and the material discharge roll row 13 on the work discharge side. And the rectangular frame-shaped vent 55 surrounding the sanding area S from the four sides outside both edges of the belt conveyor 15
And is provided in a state of opening upward to the suction port 52 of the storage medium. The discharge side of an air compressor (not shown) is connected to the ventilation port 55 via a ventilation pipe 56, and the compressed air is blown upward from the ventilation port 55 toward the dust suction duct 51.

In a portion along the outside of one edge of the belt conveyor 15, two thin arms 20a, 20a for cantileverly fixing the support 20 supporting the belt conveyor 15 to the lower frame 12 are passed. At that portion, the vent 55 is separated at a slight interval, and the portion between the arms 20a, 20a is a separate vent 55a.

Further, a dust collecting fan (not shown) having an upper portion is located on the work entrance side of the sanding area S, that is, on the discharge side of the chips generated by grinding and grinding the work (the right side of the sanding roll 38 in FIG. 1). The auxiliary dust suction duct 56 connected to the power supply is disposed. The suction port 57 at the lower end of the auxiliary dust suction duct 56 is opened at a position near the chip discharge part of the sanding roll 38 in a region surrounded by the dust suction duct 51.

Next, the operation of this embodiment will be described.

First, the interval between the sanding belt 38 and the material feeding belt 18 in the sanding area S is adjusted by moving the upper frame 31 up and down. This interval is determined in consideration of the thickness of the work and the necessary “sharpening margin”, and can be set while looking at a known gauge (not shown). Thereafter, the work transport mechanism 10 and related devices such as a dust collection fan and an air compressor are started.

Then, between the upper frame 31 and the lower frame 12, the sanding region S is formed over the entire circumference by the airflow blown upward from the ventilation port 55 and flowing into the suction port 52 of the dust suction duct 51. A surrounding air curtain C is generated. Further, in the generation area of the air curtain C, an airflow flowing into the auxiliary dust suction duct 56 is generated.

In this state, when a work (not shown) is fed into the sanding area S by the work transfer mechanism 10, the upper surface of the work is polished and ground by the sanding belt 38. A large amount of swarf is generated along with the sanding of the work, and the swarf flies around the sanding area S and is blown toward the work entry side of the sanding belt 38. However, these chips are prevented from leaking to the outside of the sanding region S by the air curtain C generated so as to surround the sanding region S, and are multiplied by the air flow of the air curtain C to generate dust in the dust suction duct 51. Or is multiplied by the airflow flowing into the auxiliary dust suction duct 56 and is sucked into the auxiliary dust suction duct 56.

Here, while the work passes through the sanding area S, a part of the vent 55 is closed by the work. However, the suction port 52 of the dust suction duct 51
Is always kept open throughout the air, and air blown out from the unblocked portion of the ventilation port 55 into the dust suction duct 51 or air from outside the sanding area S Is coming in.
Therefore, the air curtain C is generated so as to surround the sanding area S over the entire circumference.

For the arm 37a of the support 37 that supports the sanding mechanism 30 and the arm 20a of the support 20 that supports the belt conveyor 15, the dust suction duct 51 and the vent 55 are arranged in the circumferential direction. Although the air curtain C is partially cut, the space between the cut portions corresponding to the arms 37a and 20a is short, so that a large gap is not generated in the generated air curtain C so that chips can easily pass through. .

As described above, according to the present embodiment, the chips generated in the sanding area S are prevented from flowing out of the sanding area S by the air curtain C. There is no danger of spilling out and deteriorating the working environment.

Further, since the air curtain C is generated by the pressurized air blown out from the vent 55, the force of the air flow is strong. Leakage is reliably prevented.

Further, since the belt conveyor 15 of the work transfer mechanism 10 is surrounded by the frame-shaped ventilation port 55, the drive roll 16 and the driven roll 17 located at both ends on the transfer surface extend in the direction in which they spread. Although there is little room for movement, the tension roll 19 is provided on the belt conveyor 15, so that the tension of the material feeding belt 18 can be adjusted.

Note that the present invention is not limited to the above-described embodiment, and may be modified and implemented as follows, for example. (1) In the above embodiment, the air curtain C is generated by blowing out the pressurized air from the ventilation port 55 toward the dust suction duct 51. However, the dust suction duct can be formed without blowing out the compressed air from the ventilation port 55. It is also possible to generate the air curtain C only by the suction force of 51. (2) In the above-described embodiment, the auxiliary dust suction duct 56 is provided on the chip discharge side of the sanding area S in the air curtain C generation area. Dust absorption duct 5 for chips
You may make it suction only to one. (3) In the above embodiment, the sanding belt 38
The upper frame 31 provided with the sanding mechanism 30 is moved up and down as a means for adjusting the distance between the sheet feeding belt 18 and the lower frame 12 provided with the work transfer mechanism 10 is moved up and down. You may do so. (4) In the above embodiment, the traveling direction of the sanding belt 38 in the sanding area S is set to be opposite to the work transport direction, but the sanding belt travels in a direction perpendicular to the workpiece transport direction. You may make it do. (5) In the above-described embodiment, the portion corresponding to the sanding area S of the transport surface is constituted by the belt conveyor 15, but the portion corresponding to the sanding area S is provided by arranging a plurality of material feeding rolls. You may comprise. (6) In the above embodiment, the portion of the transport surface other than the sanding region S is constituted by the plurality of material rolls 13, but the portion outside the sanding region S may be constituted by a belt conveyor.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with various modifications without departing from the scope of the invention.

[Brief description of the drawings]

FIG. 1 is an overall front view of an embodiment of the present invention.

FIG. 2 is an overall right side view.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Work conveyance mechanism 15 ... Belt conveyor 16 ... Driving roll 17 ... Follower roll 18 ... Material feeding belt 19 ... Tension roll 30 ... Sanding mechanism 51 ... Dust suction duct 55 ... Vent hole S ... Sanding area

Claims (3)

(57) [Claims] 1. A sanding machine comprising: a sanding mechanism for polishing / grinding a work; and a work transfer mechanism for placing the work on a transfer surface and feeding the work to a sanding area by the sanding mechanism. A sanding machine characterized in that a dust suction duct that opens in a frame shape so as to surround the sanding area is provided, and a vent that surrounds the sanding area is provided in a frame-shaped area of the transport surface corresponding to the dust suction duct. Dust collector. 2. The dust collecting apparatus for a sanding machine according to claim 1, wherein pressurized air is supplied to the vent. 3. A region surrounded by the vent on the transport surface is constituted by a belt conveyor having a material belt stretched between rolls, and a tension roll for tensioning the material belt is provided by the belt. The dust collecting device for a sanding machine according to claim 1 or 2, wherein the dust collecting device is provided so as to be movable in a direction intersecting a direction in which the material belt is stretched.