JP2509160Y2 - Wide belt sander - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention grinds and polishes a work material conveyed in one direction by an endless sanding belt slidingly contacting in the same direction as the conveyance direction of the work material, and The present invention relates to a down-sanding wide-belt sander machine in which a material that has been ground and polished is fed while being pinched by a material-feeding member that is a roller or a belt that is located in front of the grinding and polishing position in the transport direction.

Problems to be Solved by Conventional Techniques and Inventions With the down-sanding wide-belt sander machine as described above, the dust generated by grinding and polishing the workpiece is directed toward the feeding member which is the conveying direction. If the work material is pinched by the material-sending member while being blown off and the dust adheres to the ground and polished surface of the material-processing material, the dust of the work material adheres to the surface of the material-sending member. Gradually increasing the thickness, unevenness of the laminated dust peels off due to unevenness on the surface of the material to be fed, and if the material to be processed is soft such as paulownia, cypress, cedar, etc., Due to the unevenness of the material-sending member, recessed marks are generated on the ground and polished surface of the material to be processed, which causes processing failure.

As a countermeasure against this, conventionally, a dust suction device with a dust suction port opened between the grinding and polishing position and the material feeding member is provided, and the dust that has been blown or that has adhered to the workpiece is sucked and ground and polished. It was designed to prevent dust from adhering to the surface, but when the material to be processed is a material such as wood or synthetic resin that produces a large amount of static electricity due to friction during grinding and polishing. However, it is difficult to separate the dust from the grinding and polishing surface against the attraction force by static electricity by the method of simply sucking as described above, and there is a disadvantage that the dust remains attached to the grinding and polishing surface and processing defects occur. It was

Means for Solving the Problems The present invention, as means for solving the above problems,
Provided is a pressurized air supply device in which the pressurized air outlet is opened between the grinding and polishing position and the material-feeding member so as to face the grinding and polishing surface of the workpiece, and the dust suction port is used as the pressurized air outlet. A dust suction device opened toward the grinding and polishing position is provided between the grinding and polishing position, and a sub-dust suction port is sandwiched between the grinding and polishing position and the material-feeding member to sandwich the conveyance path for the workpiece. The auxiliary dust suction device is provided so as to open so as to face the pressurized air ejection port, and the static electricity removing device that removes static electricity applied to the workpiece is provided.

The function and effect of the present invention With the above configuration, an air curtain is provided between the grinding / polishing position and the material feeding member by the pressurized air flow ejected from the pressurized air ejection port and sucked into the auxiliary dust suction port. While being formed, a suction airflow that flows into the dust suction port from the grinding / polishing position side is formed between the air curtain and the grinding / polishing position, and the workpiece is conveyed and ground / polished in this state. When the tip of the work piece moves between the grinding / polishing position and the pressurized air jet, part of the dust generated by grinding / polishing adheres to the ground / polished surface and most of the other part is sent. Part of the dust that is blown away toward the material member is sucked into the dust inlet, and the other part is blown away by the air curtain without reaching the material member. Pressurized air at the tip After reaching the jet outlet, the air curtain is blocked, and the jet pressure of the pressurized air flow blown against the grinding and polishing surface blows off the dust adhering to the grinding and polishing surface, which blows away from the grinding and polishing position. It is sucked into the dust suction port together with other dust that is generated, and as a result, dust is prevented from adhering to the work material and the material to be fed. A static electricity eliminator is installed to remove static electricity applied to the work material as well as to remove it using the output, so even if dust adheres strongly to the grinding and polishing surface due to static electricity, it must be reliably removed. There is an effect that can be.

Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

On the base 1 and the elevating frame 2 mounted above the base 1 with a space therebetween, a pair of upper and lower right material feeding rollers 3a and 3b are supported by the base 1 and the elevating frame 2 at the right end position in the figure. And the left feeding roller 4 which is also a pair of upper and lower parts at the left end position in the figure.
a and 4b are arranged by being supported by the base 1 and the elevating frame 2, and in the gap between the upper surface of the base 1 and the lower surface of the elevating frame 2, due to friction of wood, synthetic resin, or the like. A plate-shaped workpiece a made of a material that easily generates static electricity is
By being pinched between the pair of material feeding rollers 3 and 4, the material is conveyed from right to left in the drawing.

A wide, endless sanding belt 6 is attached to the lifting frame 2 at the upper and lower ends of a sanding frame 7 fixed at an intermediate position between the left and right feeding rollers 3 and 4, and at the left and right ends of the sanding frame 7. A pair of empty drive rollers 9a, 9b
The sanding belt 6 is mounted so as to travel from the left side to the right side opposite to the conveying direction of the work material a between the drive rollers 9a and 9b by being hung around and. A trampling pad 10 for protruding the running portion between the drive rollers 9a and 9b slightly downward is attached, and further, a dust suction pipe 11 connected to a dust collector (not shown) is provided on the right side with the drive roller 9b and the right portion feeding material. The dust suction port 12 at the lower end extending between the roller 3a and the sanding belt 6 is provided in the vicinity of the sanding belt 6 and is opened leftward in the figure, and the up-sanding grinding / polishing mechanism 5 is configured as described above. And
The up-sanding type grinding / polishing mechanism 5 is a workpiece which is conveyed leftward by slidingly contacting a portion of the sanding belt 6 which projects downward with a treading pad 10 and travels to the right in the figure. The upper surface of the material a is ground and polished, and the dust generated by the grinding and polished and flying rightward in the drawing is sucked into the dust suction port 12 without being scattered.

On the other hand, the base 1 is provided with a down-sanding type grinding / polishing mechanism 15 for grinding and polishing the lower surface of the work piece a, corresponding to the up-sanding type grinding / polishing mechanism 5, both left and right sides. A wide endless sanding belt 16 is provided between the material feeding rollers 3 and 4 and a tension roller 18 at the lower end of the sanding frame 17 fixed to the base 1 and a pair of left and right upper ends spaced apart. By being wound around the drive rollers 19a and 19b of the above, the drive rollers 19a and 19b are mounted between the drive rollers 19a and 19b so as to travel from the right side to the left side in the same manner as the conveyance direction of the workpiece a, and Drive roller 19
At the intermediate position between a and 19b, a treading pad 20 is attached to allow the sanding belt 16 to project slightly upward so that the sanding belt 16 is brought into sliding contact with the lower surface of the workpiece a.

Between the left drive roller 19a and the left lower material feeding roller 4b located further to the left thereof, an upward pressurized air outlet 22 of a pressurized air supply pipe 21 connected to a compressor (not shown), A long and narrow opening is formed at right angles to the conveying direction of the work material a,
In addition, the auxiliary dust suction pipe 23 is disposed so as to approach the lower surface of the work material a so as to correspond thereto, and above the pressurized air ejection port 22 and is connected to a dust collector (not shown) of the auxiliary dust suction pipe 23. The mouth 24 is provided facing the pressurized air jetting port 22 downward, and wide open in the left-right direction which is the conveying direction of the workpiece a. At a position near the right side of the outlet 22, a dust suction port 26 of a dust suction pipe 25 connected to a dust collector (not shown) is arranged in a state in which the dust suction port 26 is opened obliquely toward the upper right side. Further, in the vicinity of the right side of the dust suction port 26, an elongated static eliminator 27 in which a large number of carbon fibers 29 are planted in a grounded conductive rod 28 is oriented at a right angle to the conveyance direction of the workpiece a, Moreover, the tip end of the carbon fiber 29 is fixed so as to come into contact with the lower surface of the workpiece a.

Next, the operation of the down-sanding type grinding / polishing mechanism 15 configured as described above will be described.

When driving a compressor (not shown) and each dust collector,
At the left side of the sanding belt 16, there is a jet of pressurized air.
An air curtain is formed by the pressurized air flow ejected upward from 22 and sucked into the auxiliary dust suction port 24, and
Dust suction port 26 flowing from the sanding belt 16 side to the left
When a suction air flow that flows into the inside is generated and the work material a is conveyed from the right side to the left side in the figure in such a state, the lower surface thereof is ground and polished by the sanding belt 16,
Most of the scraped dust is on the left side of the figure, that is, the workpiece a
However, during the period from the start of grinding and polishing until the tip edge of the work piece a reaches the air curtain, as shown in FIG. The part is sucked into the dust suction port 26 by the suction air flow, and the other part of the dust is sucked into the auxiliary dust suction port 24 by being caught in the jet flow of the air curtain. The dust does not penetrate the air curtain and adhere to the surfaces of the left material feeding rollers 4a and 4b located on the left of the air curtain.

Part of the dust that has not been blown to the left firmly adheres to the ground and polished portion of the lower surface of the workpiece a due to the electrostatic attraction generated by friction during grinding and polishing. However, as the work material a moves to the left, the carbon fibers 29 of the static eliminator 27 come into contact with the ground and polished lower surface to remove the static electricity, thereby adsorbing dust to the work material a. The force to make it weakened. In this state, the workpiece a
After the air curtain is shielded by the leading edge of the passage passing above the pressurized air jet port 22, the pressurized air flow jetted from the pressurized air jet port 22 reaches the lower surface of the workpiece a. Along with being blown off, the shielding plate 30 protruding upward on the left edge of the opening of the pressurized air jet 22 prevents the air from being blown to the left, so that the sanding belt 16 side has a suction air flow. As they join and flow into the dust suction port 26, the dust is blown off from the lower surface of the work piece a by the jetting pressure of the pressurized air flow and is removed, and adheres to the left feed roller 4b. As shown in FIG. 3, the dust is sucked into the dust suction port 26 together with most of the other dust that has been blown without adhering to the workpiece a.

Therefore, dust does not scatter toward the left-side material feeding rollers 4a and 4b, and the work piece a is left-side material-feeding rollers.
Since the dust is completely removed from the lower surface of the work piece a when it is pinched by the 4a and 4b, the dust does not adhere to the surface of the left part lower feed roller 4b and the left part feed roller 4b does not have the dust. Due to the unevenness formed on the surface of the lower material roller 4b by stacking dust, the work material a
There is no occurrence of depression marks on the ground and polished lower surface.

In addition, in the first embodiment, since the pressurized air ejection port 22 is opened upward, the auxiliary dust suction port 24 is provided so as to face the pressurized air ejection port 22. Then, the dust blown upward is prevented from falling and adhering to the ground and polished upper surface of the workpiece a and the surfaces of the left material feeding rollers 4a and 4b.

Similarly, in the first embodiment, since the dust adhering to the lower surface of the work piece a is blown off by the pressurized air, the static electricity eliminator 27 is used to weaken the dust adsorption force.
There is an advantage that dust can be surely blown off.

Next, a second embodiment of the present invention will be described with reference to FIG.

The wide belt sander machine according to the second embodiment is provided with a down-sanding type grinding / polishing mechanism 32 for grinding and polishing the upper surface of the workpiece b, and the lifting table 34 provided on the base 33 has , Drive roller 35 and tension roller
A feeding belt 38 is provided which is hung around between the feeding belt 38 and the upper straight running portion 37 to run from the right side to the left side in FIG. 4 and the left side of the feeding belt 38. At the position, a pair of upper and lower material feeding rollers 40a, 40b are mounted,
The material b to be processed is placed on the material feeding belt 38 and is pinched between the material feeding rollers 40a and 40b so that it is conveyed from the right side to the left side in the drawing. .

A wide endless sanding belt 41 and a sanding frame 42 are provided above the left end of the material feeding belt 38.
It is mounted by being wound around a tension roller 43 at the upper end of the sanding belt and a sanding drum 44 at the lower end, and the circular arc portion 45 at the lower end of the sanding belt 41 slides in the clockwise direction. Then, the upper surface of the workpiece a is ground and polished.

Between the sanding belt 41 and the material-feeding upper roller 40a located on the left side of the sanding belt 41, a pressurized air jet 47 of a pressurized air supply pipe 46 connected to a compressor (not shown) is provided on the upper surface of the workpiece b. It is provided by opening downward so as to face
At a position slightly higher than the pressurized air jet 47 in the pressurized air supply pipe 46, a static eliminator 48 that discharges positive or negative ions generated by corona discharge into the pressurized air flow. Is installed. Further, a dust suction port 50 of a dust suction pipe 49 connected to a dust collector (not shown) is provided between the pressurized air jet port 47 and the sanding belt 41.
It is provided in a state in which it opens almost downward at a position near 47 and has a slightly widened mouth toward the sanding belt 41 side, and flows from the sanding belt 41 side to the left and flows into the dust suction port 50. A suction air flow is formed, and between the material feeding belt 38 and the material feeding lower roller 40b located on the left side of the material feeding belt 38, an auxiliary dust suction pipe 51 connected to a dust collector (not shown) is provided. The dust suction port 52 of the above is formed so as to open upward corresponding to the pressurized air ejection port 47, and the pressurized air ejected from the pressurized air ejection port 47 flows into the auxiliary dust suction port 52. Thus, a downward air curtain is formed.

The wide belt sander machine according to the second embodiment has the above-described configuration, and before the tip edge of the workpiece b reaches the air curtain, a part of dust generated by grinding and polishing is processed by static electricity generated by friction. While adhering to the ground and polished upper surface of the material b, most of the other is blown to the left of the sanding belt 41, and a part of the blown dust is sucked from the dust suction port 50, while The portion is sucked into the auxiliary dust suction port 52 by the air flow of the air curtain.

When the workpiece b reaches the position where it interrupts the air curtain, the pressurized air flow ejected from the pressurized air ejection port 47 and blown to the ground and polished upper surface changes the positive or negative ions in the pressurized air. By removing the static electricity of the work piece b, the dust adsorbing power is weakened and the dust is blown off and removed from the top surface of the work piece b. The removed dust is on the sanding belt 41 side. It is sucked into the dust suction port 50 together with the dust blown off from.

Therefore, the dust generated by the grinding and polishing does not remain attached to the workpiece b, and does not adhere to the material feeding rollers 40a and 40b even if it is blown to the left.

In the first and second embodiments, the material-feeding rollers 4a, 4b, 40a, 40b are used as the material-feeding members for bringing the workpieces a, b into contact with the ground and polished surface. The present invention can also be applied to a wide belt sander machine of a type that uses a material feeding member composed of an endless belt instead of a roller type material feeding member.

In addition, the present invention uses the up-sanding method for the upper surface and the down-sanding method for the lower surface described in the first embodiment, and the down-sanding type, or the upper surface described in the second embodiment. It can be applied not only to wide-belt sander machines of the grinding type by grinding type but also to other types of wide-belt sander machines of down-sanding type such as the type of grinding and polishing only the lower surface with down-sanding type. It is possible.

[Brief description of drawings]

The accompanying drawings show an embodiment of the present invention, FIG. 1 is a partially cutaway side view of the first embodiment, and FIGS. 2 and 3 are partially cutaway enlarged side views showing the operating state thereof. 4 is the second
It is a partially notched side view of an Example. 4a: Left part feeding upper roller, 4b: Left part feeding lower roller, 16, 41:
Sanding belt, 21, 46: Pressurized air supply pipe, 22, 47:
Pressurized air jet, 23, 51: Secondary dust supply pipe, 24, 52: Secondary dust suction port, 25, 49: Dust suction pipe, 26, 50: Dust suction port, 40a:
Material feeding upper roller, 40b: Material feeding lower roller, a, b: Work material

Claims (1)

(57) [Scope of utility model registration request] 1. A work material conveyed in one direction is ground and polished by an endless sanding belt which is slidably contacted in the same direction as the conveyance direction of the work material, and the ground and polished work material is conveyed. In a down-sanding wide-belt sander machine in which a material feeding member consisting of a roller or a belt arranged in front of the grinding / polishing position in the vertical direction is used to pinch and feed, And a material feeding member, a pressurized air supply device opened so as to face the grinding and polishing surface of the material to be processed is provided, and a dust suction port is provided between the pressurized air ejection port and the grinding and polishing position. A dust suction device opened toward the grinding and polishing position side between the grinding and polishing position and the auxiliary dust suction port between the grinding and polishing position and the material feeding member. A secondary dust suction device is provided so as to be opposed to the pressurized air ejection port across the transport path, and a static electricity removal device for removing static electricity applied to the workpiece is provided. Wide belt sander machine