JPH0569408A - Apparatus for preventing cut-dust scatter - Google Patents

Abstract

PURPOSE:To prevent chips (cut-dust) from scattering at the time of cutting lumber or the like by an electric saw. CONSTITUTION:A cut-dust scattering device A is used in a cutting machine B wherein lumber C to be cut is fixed on a plate-like working table 1 and cutting is effected by an electric saw. The cut-dust scattering device A is designed to prevent cut-dust from scattering by a cut-dust cover 10 provided on the working surface 1a of the working table 1. On the cut-dust cover 10, a notch 10a is provided where the lumber C is set on the working table 1. The notch 10a is made blocked such that a number of thin plates 10c are arranged in parallel. The thin plates 10c are capable of moving upward. After moving these thin plates 10 upward, the lumber C is set therein and, by moving the thin plates C downward in mating with the cross-sectional dimension of the lumber C, the notched part is blocked nearly completely without gaps.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust scattering prevention device for preventing scattering of dust generated when cutting an object such as wood.

[0002]

2. Description of the Related Art Generally, when an object to be cut is cut by a cutting machine having an electric saw, the object to be cut is dusted and scattered, so that the worker is prevented from being affected by this dust. Therefore, in order to prevent the periphery of the cutting machine from being contaminated by dust, the cutting machine is provided with a dust collector.

When cutting an object with an electric saw, a cover for covering a part of the blade of the electric saw is provided at a place where dust is scattered, and a suction port for collecting dust is provided at that portion. It was dusty. Alternatively, a cover that covers the entire workbench where the electric saw is installed is provided, and the dust collector is connected to this cover.

[0004]

By the way, when the cover for covering a part of the blade of the electric saw is provided, the cover is provided in accordance with the dust scattering direction depending on the positional relationship between the object to be cut and the blade of the electric saw. Therefore, a dust collecting device having a strong suction force is required to completely prevent dust from scattering, resulting in an increase in equipment cost.

If the entire workbench is covered with a cover and a dust collector is attached to this cover, dust will not scatter around, but the dust collector collects all the dust generated in the cover. Is difficult, and a considerable amount of uncollected dust will fall and accumulate on the floor inside the cover. Therefore, the inside of the cover must be cleaned regularly. In addition, dust may be scattered outside the cover during cleaning.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dust collector having a strong suction force without covering the entire work table on which the electric saw is installed. An object of the present invention is to provide a dust scattering prevention device that prevents dust from scattering around the cutting machine without the need.

[0007]

In the dust prevention apparatus of the present invention, the workbench is provided with a cylindrical dust cover with a lid for covering the moving portion of the blade on the upper surface thereof, and the dust cover is provided with a dust cover for the workbench. Along with opening from the top surface, a cutout is provided for inserting the cut object into the cutting position, and a plurality of vertically long thin plates are arranged in parallel along the side surface of the dust cover so as to shield the cutout. These thin plates are arranged so that they can move up and down.
The lifting means for moving the thin plate upward to open the notch is detachably hooked on the upper side, which is the means for solving the above-mentioned problems.

[0008]

According to the above structure, first, the elevating means moves each thin plate upward to open the notch. Then, in this state, the cut object is inserted into the cutout portion of the dust cover, and the cutting position is adjusted to the moving position of the blade of the electric saw. Next, the elevating means lowers each thin plate downward. At this time, since each thin plate is detachably hooked to the elevating means on the upper side, the thin plate whose lower end is in contact with the workpiece is disengaged from the hook of the elevating means and stopped at that position. ..
In addition, thin plates other than the above are lowered until the lower end contacts the work surface. Therefore, the thin plate closes the cutout portion of the dust cover substantially along the shape of the object to be cut. That is, the cut portion of the cut object is covered with the dust cover and the thin plate with substantially no space. Therefore, dust is prevented from scattering when the electric saw is operated to cut the object to be cut.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 8 show a dust scattering prevention apparatus A of this embodiment and a cutting machine B equipped with the dust scattering prevention apparatus A. The cutting machine B of this embodiment is a pillar, a beam, For cutting long wood C such as core material of wood panel (constituting frame of wood panel which is a building material of prefabricated house), or for providing a groove perpendicular to the longitudinal direction on these wood C is there.

Next, the cutting machine B will be described before describing the dust scattering prevention apparatus A of this embodiment. As shown in the overall views of FIGS. 2 and 3, the cutting machine B includes a long plate-shaped work table 1, a plurality of legs 2 supporting the work table 1, and an object to be cut. Vertical fixing parts 3 and 3 that press and fix two left and right sides of a cut portion of a wood C to the work surface 1a of the workbench 1 from above, and the vicinity of the cut portion of the wood C of the workbench 1 from above. A vertical fixing portion 4 that presses and fixes the work surface 1a, and horizontal fixing portions 5 and 5 that presses and fixes two positions on the left and right sides of the cut portion of the wood C from the front to a rear side wall 1b described later. An electric saw 6 that cuts the wood C while moving at right angles to the length direction of the table 1, a dust scattering prevention device A, and a suction pipe 7 connected to a dust collector (not shown) Is.

In the cutting machine B of this embodiment, electric saws 6 are arranged at two locations on one workbench 1, and each fixing portion 3, 4, 5 corresponds to each electric saw. Are arranged.

As shown in FIG. 3, the workbench 1 is a rectangular plate in plan view, and has a long plate-like shape at the front and rear portions thereof along the length of the workbench. Side walls 1b and 1c are erected. The rear side wall 1b serves as a ruler for determining the position of the wood as described later. And
As shown in FIGS. 1 and 2, a large number of grooves 1d ... Are formed on the upper portions of the side walls 1b and 1c. These grooves 1
d are provided at the same position on the front side wall 1c and the rear side wall 1b. The grooves 1d ... As shown in FIG. 1, the stopper 8 for determining the position of the end surface of the wood C.
It is for attaching.

The stopper 1 is provided with fitting pieces 8a, 8a protruding leftward and rightward from an upper part of a rectangular plate body, and the fitting pieces 8a, 8a are fitted in the grooves 1 of the side walls 1b, 1c.
By fitting with d, the work table 1 can be mounted at right angles to the length direction of the work table 1. The positions of the plurality of grooves 1d ... Of the side walls 1b, 1c are determined by the length of the wood C to be cut,
By selecting the grooves 1d, attaching the stopper 8 and bringing the end surface of the wood C into contact with the stopper 8, the wood C can be cut to a desired length.

The legs 2 ... Are rod-shaped, and have a workbench 1
The workbench 1 is supported by extending downward from the front and rear side edges of the lower surface. As shown in FIG. 2 and the like, the vertical fixing portions 3 and 4 are provided with a support base 3a erected at a position corresponding to the electric saw 6 behind the work base 1 and a front surface of the support base 3a. A rod-shaped support member 3b provided horizontally along the length direction of the workbench 1, and upper and lower sides of the workbench 1 from both left and right end portions and a central portion of the support member 3b, at a right angle to the workbench 1 length direction Three horizontally extending support arms 3c, 3c, 4c,
It is composed of two air cylinders 3d and 3d standing on the support arms 3c and 4c, and a pressing member 3e connected to the air cylinders 3d and 3d.

The support arms 3c and 3c extending from the left and right ends of the support member 3b are formed in a rectangular box shape with a lid and a bottom in plan view. Then, 2 is provided on the upper surfaces of the support arms 3c and 3c.
Book air cylinders 3d and 3d are vertically installed up and down with the pistons 3f and 3f side facing down. The pistons 3f and 3f of the air cylinders 3d and 3d can penetrate the support arms 3c and 3c and extend below the support arms 3c and 3c.

A pressing member 3e, which is rectangular in plan view, is connected to the lower ends of the pistons 3f and 3f of the two air cylinders 3d and 3d in parallel with the support arm 3c. The pressing member 3e can be housed inside the support arm 3c with the pistons 3f and 3f contracted at the top. The lower portion of the pressing member 3e is formed of an elastic member such as rubber so as not to damage the wood C. The support arm 4c extending from the central portion of the support member 3b is a top plate (support arm 4 of the dust cover 10 of the dust scattering prevention device A described later).
Except for c), the configuration is substantially the same.

As shown in FIG. 3 and the like, the horizontal fixing portions 5 are provided on the projecting pieces 5a provided on the left and right sides at the front side edge of the workbench 1 in correspondence with the positions of the blades 6a of the electric saw 6, respectively. , Each of which is composed of a fixed air cylinder 5b. The air cylinder 5b is fixed at a right angle and horizontally with respect to the length direction of the workbench 1 with its front end abutting against the projecting piece 5a, and the piston 5c of the air cylinder 5b is fixed to the projecting piece 5a and the workbench. The side wall 1c on the front side of No. 1 can be extended to the side wall 1b on the rear side. A cap 5d made of an elastic material such as rubber is attached to the front end of the piston 5c so as not to damage the wood C.

The electric saw 6 has a saw blade 6a on a disk,
It is rotated by an electric motor 6b. The blade 6a of the electric saw is arranged at right angles to the length direction of the workbench 1. The electric saw 6 can be moved by a drive means (not shown) along the guide rails 6c (shown in FIG. 5) at right angles to the longitudinal direction of the workbench 1. Further, the blade 6a of the electric saw 6 has an upper portion protruding from a slit 1d (shown in FIG. 7 and the like) provided on the workbench 1, and should move while the electric saw 6 is operating. By this, the wood C on the workbench 1 can be cut.

In the moving range of the blade 6a of the electric saw 6 that moves as described above, the lower part of the workbench 1 is covered with the lower cover 11. A slit 11a (not shown) for the rotating shaft of the moving electric motor 6b is provided on the side of the lower cover 11 so that the lower cover 11 does not interfere with the movement of the electric saw 6. The lower cover 11 is connected to the suction pipe 7 of the dust collector. The pipe 7 is a flexible tube made of synthetic resin and having a bellows.

Next, the dust scattering prevention apparatus A of this embodiment will be described. The workbench 1 is provided with a covered cylindrical dust cover 10 that covers the moving portion of the blade 6a on the upper surface thereof. The dust cover 10 is opened from the upper surface of the workbench 1 and
The cutout portion 10a for inserting the wood C into the cutting position is provided,
A plurality of vertically long thin plates 10c are arranged along the side surface of the dust cover 10 so as to shield the cutout portion 10a so as to be vertically movable in parallel with each other.
Are removably hooked on the upper side by elevating means 10d that moves the thin plates 10c upward to open the notch 10a.

The dust cover 10 has a rectangular side plate 10e provided upright on the front and rear side walls 1b, 1c of the work table 1 corresponding to the moving position of the blade 6a of the electric saw 6, and an upper end of the side plate 10e. It is composed of a top plate 4c that connects the two to each other, and left and right guide plates 10d and 10d that connect the upper portions of the side edges of the side plate 10e to each other.
The lower opening of the guide plate 10d is a cutout portion 10a. That is, the side plate 10e and the guide plate d form a rectangular tubular body in a plan view, and the top plate 4c serves as a lid. Top plate 4
A slit 10f is formed between c and the guide plate 10d. The slit 10f has a plurality of thin plates 10c.
... are arranged in parallel and are inserted vertically.

Also, the thin plate 1 inserted in the slit 10f.
0c ... is guided by the adjacent thin plate 10c, slit 10f, and guide plate 10d, and is movable up and down. The lengths of the thin plates 10c ... Are formed such that the upper ends of the thin plates 10c ... Project above the top plate 4c in a state where the lower ends of the thin plates 10c. There is. At the upper end of the thin plates 10c ...
Pins 10g (shown in FIG. 6) for locking are provided so as to project inward of 0c.

As shown in FIGS. 6 and 7, the elevating means 10d is composed of an air cylinder 12c, a retaining plate 12e, etc. described below. Two columns 12a on the thin plate 10c are erected on the upper surface of the top plate 4c between the above two air cylinders 3d, and the upper ends of these two columns 12a are connected by a support member 12b. An air cylinder 12c is vertically installed on the upper surface of the support member 12b with the piston 12d facing downward. The tip of the piston 12d of the air cylinder 12 penetrates the support member 12b, and the hooking portion 12 that hooks the pins 10g of the thin plates 10c.
e is connected.

As shown in FIG. 6, the hook portion 12e includes two rod bodies 12f, 1f extending along the length direction of the guide plate 10d.
2f and a connecting portion 12g connecting the central portions of the rods 12f, 12f are formed in an H shape in a plan view. The central portion of the connecting portion 12g is the piston 12
It is connected to the tip of d. The pin 10g of the thin plate 10c is hooked on the upper surface of the rod 12f. The width of the rods 12f, 12f is the width of the thin plate 10
The head portion of the pin 10g is slightly narrower than the head portion of the pin 10g from c, and the head portion of the pin 10g is caught on the side edge of the rod 12f.

With this structure, the pistons 12d of the air cylinder 12c are retracted upward so that the thin plates 10c ... Can be moved upward. Then, when the piston 12d is advanced downward, the thin plates 10c ... Can be moved downward. Further, since the pins 10g of the thin plates 10c are merely hooked on the upper surface of the rod 12f, when there is an obstacle below the thin plates 10c when moving the thin plates 10c. When the lower ends of the thin plates 10c come into contact with the obstacle, the rod 12f of the hooking portion 12e and the thin plate 10c are disengaged, and the thin plate 10c is placed on the obstacle. It is like this.

Next, a method of cutting the wood C using the cutting machine B equipped with the dust scattering prevention apparatus A of this embodiment will be described. First, the air cylinder 12c on the dust cover 10
Is set in a state in which the piston 12d is retracted upward, and each thin plate 10c is moved upward so that the cutout portion 10a of the dust cover 10 is opened.

Next, the stopper 8 is fitted into the grooves 1d of the side walls 1b and 1c of the workbench 1 corresponding to the length of the wood C to be cut. The wood C to be cut is then covered with the dust cover 10
It is inserted into the notch portion 10a and placed on the workbench 1. Then, the end surface is brought into contact with the side surface of the stopper 8. In this state, the horizontal fixing portion 5 is operated to press the wood C against the rear side wall 1b to fix the position of the wood C and make the length direction of the wood C parallel to the side wall 1b. Next, the vertical fixing part 3 is activated to move the wood C to the work surface 1.
The position of the wood C is also fixed by pressing it on a.

Next, the piston 12d of the air cylinder 12c until the lower end of each thin plate 10c contacts the work surface 1a.
Forward. At this time, the thin plates 10c, which were above the wood C, have their lower ends abutted on the upper surface of the wood C,
Stop at that position. The other thin plates 10c are lowered until their lower ends come into contact with the work surface 1a. Therefore, the notch 1
0a is closed by the wood C and the thin plates 10c ...

Next, the dust collector is operated. Then, the dust in the lower cover 11 is collected from the suction pipe 7. At this time, the dust in the dust cover 10 is sucked from the slit 1d for the electric saw 6 of the workbench 1 to move into the lower cover 11, and is sucked from the lower cover 11 into the suction pipe 7. It

Next, the electric saw 6 is operated to cut the wood C. The dust generated when the wood C is cut is not disturbed mainly by the dust cover 10 and the thin plate 10c and does not scatter out of the dust cover 10. Also,
Dust that has scattered around the back of the workbench 1 is
Will be blocked by 1. And the dust cover 1
0 and the dust remaining in the lower cover 11 will be collected from the suction pipe 7 as described above. As described above, according to the dust scattering apparatus A of this embodiment, the dust generated when the object to be cut such as the wood C is cut is the dust cover 10.
It is blocked by the thin plate 10c and dust is not scattered outside.

The dust cover 10 can easily install the wood C on the workbench 1 without disturbing the cutting of the wood C and by pulling up the thin plates 10c ... Since the dust cover 10 and the thin plate 10c can cover the periphery of the moving range of the blade 6a projecting on the work surface 1 in a narrow range, the volume inside the dust cover 10 can be narrowed and dust collection without a large suction force is possible. Even the device can easily suck the dust in the dust cover 10.

The dust scattering prevention apparatus A of the present invention is not limited to this embodiment, and the specific constitutional requirements such as the shape and size of each member can be appropriately changed in practice. For example, the width of the workbench 1 and the width of the dust cover 10 may be increased so that a plate-shaped object can be cut.

[0033]

As described above, according to the present invention, the following excellent effects can be obtained. Dust generated when the object to be cut is cut off by the dust cover and the thin plate, and the dust does not scatter outside. Also,
Since the dust cover and the thin plate can cover the periphery of the moving range of the blade protruding on the work surface in a narrow range without hindering the cutting of the wood, the volume inside the dust cover is narrow,
Even a dust collector without a large suction force can easily suck the dust inside the dust cover.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a cutting machine including the dust scattering prevention device according to the above embodiment.

FIG. 2 is a front view of the cutting machine.

FIG. 3 is a plan view of the cutting machine.

FIG. 4 is a perspective view of essential parts showing a dust scattering prevention device, a horizontal fixing portion, and a vertical fixing portion of the cutting machine.

FIG. 5 is a side view of the cutting machine.

FIG. 6 is a perspective view of an essential part with a part of the dust scattering prevention device cut away.

FIG. 7 is a side view in which a part of the dust scattering prevention device is cut away.

FIG. 8 is a side view in which a part of the dust scattering prevention device is cut away.

[Explanation of symbols]

 A dust scattering prevention device B cutting machine C wood 1 workbench 6 electric saw 6a electric saw blade 10 dust cover 10a notch 10c thin plate 10d lifting means

Claims (1)

[Claims] 1. A cutting machine for cutting an object to be cut such as wood fixed on a work table by a blade of an electric saw which projects from below the work table onto the work table and moves in a cutting direction. The workbench is provided with a cylindrical dust cover with a lid for covering the moving part of the blade on the upper surface thereof, and the dust cover is opened from the top surface of the workbench and the cut object is inserted into the cutting position. A notch is provided, and a plurality of vertically long thin plates are arranged so as to shield the notch so as to be vertically movable in parallel along the side surface of the dust cover with substantially no space therebetween. A dust scattering prevention device characterized in that it is detachably hooked to the upper side by an elevating means for moving a plate upward to open a notch.