JP3034990B2 - Dust scattering prevention device - Google Patents

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 dust generated when cutting an object such as wood from scattering.

[0002]

2. Description of the Related Art Generally, when an object to be cut is cut by a cutting machine having an electric saw, dust of the object to be cut is generated and scattered, so that it is possible to prevent an operator from being affected by the dust. In order to prevent the surroundings of the cutting machine from being contaminated with dust, the cutting machine is provided with a dust collecting device.

When cutting an object to be cut with an electric saw, a cover for covering a part of the blade of the electric saw is provided where dust scatters, and a suction port for collecting dust is provided at that portion. Was dusty. Alternatively, a cover that covers the entire workbench on which the electric saw is installed is provided, and a dust collector is connected to the cover.

[0004]

When a 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. Because of the difficulty, a dust collector having a strong suction force is required to completely prevent the dust from being scattered, which has resulted in an increase in equipment cost.

If the entire workbench is covered with a cover and a dust collecting device is attached to the cover, dust does not scatter around, but the dust collecting device collects all dust generated in the cover. This 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 periodically cleaned. Further, at the time of cleaning, there is a possibility that dust may be scattered outside the cover.

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 workbench 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 being scattered around a cutting machine without requiring it.

[0007]

In the dust prevention apparatus according to the present invention, the worktable is provided with a dust cover having a cylindrical shape for covering the moving portion of the blade on the upper surface thereof. A notch is provided that opens from the upper surface and allows the object to be cut to be inserted into the cutting position , and a plurality of vertically long thin plates are arranged side by side along the side surface of the dust cover with almost no gap so as to shield the notch. to be vertically movable arrangement, they Hosoban is a lifting means for opening the cut-out portion to move the said sub plate upwards, hooked detachably to the upper side, further, the operation
The work table is pressed from the side with the object to be cut,
A cylinder for positioning is provided at the end of the notch.
Was solutions of the problem to be solved that.

[0008]

According to the above construction, first, each thin plate is moved upward by the elevating means to open the notch. Then, in this state, the object to be cut is inserted into the notch of the dust cover, and the cutting position is adjusted to the moving position of the blade of the electric saw. Next, each thin plate is lowered by the lifting means. At this time, since each thin plate is detachably hooked to the elevating means on the upper side, the thin plate whose lower end abuts on the object is disengaged from the hook of the elevating means and stops at that position. .
Further, other thin plates are lowered until the lower end contacts the work surface. Therefore, the thin plate closes the notch of the dust cover substantially along the shape of the object to be cut. That is, the cut portion of the object is covered with the dust cover and the thin plate without any gap. Therefore, when the electric saw is operated to cut the object to be cut, scattering of dust is prevented.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 8 show a dust scattering prevention device A of the present embodiment and a cutting machine B equipped with the dust scattering prevention device A. The cutting machine B of the present embodiment includes columns, beams, It is for cutting long woods C such as wood panel cores (those that constitute the frame of wood panels used as building materials for prefabricated houses), or for providing grooves perpendicular to the length direction of these woods C. is there.

Next, before describing the dust scattering prevention apparatus A of the present embodiment, the cutting machine B will be described. As shown in 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 portions 3 and 3 for pressing and fixing two places on the left and right sides of a cut portion of a piece of wood C to the work surface 1a of the work table 1 from above, and the work table 1 near the cut portion of wood C from above. A vertical fixing portion 4 that presses and fixes the work surface 1a, a horizontal fixing portion 5 that presses and fixes two places on the left and right sides of the cut portion of the wood C from the front to a rear side wall 1b described below, An electric saw 6 for cutting 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 collection device (not shown). It is.

In the cutting machine B of this embodiment, electric saws 6 are arranged at two positions on one work table 1, and the fixing portions 3, 4, and 5 also correspond to the respective electric saws. It is arranged.

As shown in FIG. 3, the work table 1 is a rectangular plate in a plan view, and its front and rear portions have long plate-like shapes along the length of the work table. 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
A large number of grooves 1d are formed in the upper portions of the side walls 1b and 1c as shown in FIGS. These grooves 1
are provided at the same position on the front side wall 1c and the rear side wall 1b. The grooves 1d are provided with stoppers 8 for determining the position of the end face of the wood C as shown in FIG.
It is for attaching.

The stopper 1 is provided with fitting pieces 8a, 8a protruding left and right from the upper part of the rectangular plate body. The fitting pieces 8a, 8a are fitted to the grooves 1 of the side walls 1b, 1c.
By being fitted to d, the work table 1 can be mounted on the work table 1 at right angles to the length direction thereof. The positions of the plurality of grooves 1d in the side walls 1b, 1c are determined by the length of the wood C to be cut.
By selecting the groove 1d, attaching the stopper 8, and bringing the end face 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 the work table 1
The work table 1 is supported by extending downward from front and rear side edges of the lower surface. As shown in FIG. 2 and the like, the vertical fixing portions 3 and 4 include a support base 3a erected at a position corresponding to the electric saw 6 behind the work table 1 and a front surface of the support table 3a. A bar-shaped support member 3b provided horizontally along the length direction of the work table 1, and a right angle in the length direction of the work table 1 from the left and right ends and the center of the support member 3b to the work table 1 upward. Three support arms 3c, 3c, 4c extending horizontally,
It consists of two air cylinders 3d, 3d erected on the support arms 3c, 4c, and a pressing member 3e connected to the air cylinders 3d, 3d.

The support arms 3c, 3c extending from both right and left ends of the support member 3b are formed in a rectangular shape with a closed bottom and a bottom when viewed in plan. Then, the upper surface of the support arms 3c and 3c is
The air cylinders 3d, 3d are vertically set up front and rear with the pistons 3f, 3f side down. The pistons 3f, 3f of the air cylinders 3d, 3d can extend through the support arms 3c, 3c below the support arms 3c, 3c.

At the lower ends of the pistons 3f, 3f of the two air cylinders 3d, 3d, a rectangular pressing member 3e in a plan view is connected in parallel with the support arm 3c. The pressing member 3e can be housed inside the support arm 3c with its upper part contracting the pistons 3f, 3f. The lower part 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 center of the support member 3b is connected to a top plate (support arm 4) of a dust cover 10 of the dust scattering prevention device A, which will be described later.
Except for c), the configuration is substantially the same.

As shown in FIG. 3 and the like, the horizontal fixing portion 5 has projecting pieces 5 a provided on the left and right sides corresponding to the position of the blade 6 a of the electric saw 6 on the front side edge of the work table 1. , Each of which is constituted by a fixed air cylinder 5b. The air cylinder 5b is fixed at right angles and horizontally to the length direction of the worktable 1 with its front end abutting on the projecting piece 5a, and the piston 5c of the air cylinder 5b is connected to the projecting piece 5a and the worktable. 1 can extend through the front side wall 1c to the rear side wall 1b. 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. And, by this air cylinder 5b,
Then, the wood C to be cut is pressed from the side and the wood C is pressed.
C is in contact with the end of the notch, that is, the rear side wall 1b
Positioning.

The electric saw 6 comprises a saw blade 6a on a disk,
It is rotated by the electric motor 6b. The blade 6a of the electric saw is arranged at right angles to the length direction of the work table 1. The electric saw 6 can be moved at right angles to the length direction of the worktable 1 along a guide rail 6c (shown in FIG. 5) by driving means (not shown). The blade 6a of the electric saw 6 is configured such that its upper part protrudes from a slit 1d (shown in FIG. 7 and the like) provided in the work table 1, and moves while the electric saw 6 is operated. Thereby, the wood C on the work table 1 can be cut.

The moving range of the blade 6a of the electric saw 6, which moves as described above, is such that a portion below the work table 1 is covered by the lower cover 11. A slit 11a 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 hinder 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 bellows flexible tube made of synthetic resin.

Next, the dust scattering prevention device A of the present embodiment will be described. The workbench 1 is provided with a dust cover 10 having a cylindrical shape that covers a moving portion of the blade 6a on the upper surface. The dust cover 10 is opened from the upper surface of the workbench 1,
Notch 10a for inserting wood C into the cutting position is provided,
Also, a plurality of vertically long thin plates 10c are arranged so as to be able to move up and down in parallel along the side surface of the dust cover 10 with almost no gap so as to shield the notch portion 10a.
Are detachably hooked on the upper side by elevating means 10d for moving the thin plates 10c upward to open the notch 10a.

The dust cover 10 has a rectangular side plate 10e erected on the front and rear side walls 1b and 1c of the worktable 1 in accordance with 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 connecting the two, and left and right guide plates 10d and 10d connecting the upper portions of the side edges of the side plate 10e,
An opening below the guide plate 10d is a notch 10a. That is, the side plate 10e and the guide plate d form a rectangular tubular body in 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. This slit 10f has a plurality of thin plates 10c.
Are arranged in parallel and inserted vertically.

The thin plate 1 inserted into the slit 10f
0c... Can be moved up and down by being guided by the adjacent thin plate 10c, slit 10f, and guide plate 10d. The length of the thin plates 10c is 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 abut on the work surface 1a. I have. At the upper end of the thin plate 10c projecting above the top plate 4c, a thin plate 1
A locking pin 10g (shown in FIG. 6 and the like) is provided so as to protrude inward of 0c.

As shown in FIGS. 6, 7 and the like, the elevating means 10d comprises an air cylinder 12c and a latch plate 12e described below. On the upper surface of the top plate 4c, two columns 12a on the thin plate 10c are erected between the two air cylinders 3d, and the upper ends of the two columns 12a are connected by a support member 12b. An air cylinder 12c is vertically provided 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 engages with the pin 10g of the thin plate 10c.
e is connected.

As shown in FIG. 6, the hook 12e has two rods 12f, 1f extending along the length 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 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
From c, it is slightly narrower than the head of the pin 10g, and the head of the pin 10g is hooked on the side edge of the rod 12f.

With such a configuration, the thin plates 10c can be moved upward by retracting the piston 12d of the air cylinder 12c upward. When the piston 12d is advanced downward, the thin plates 10c can move downward. Also, since the pins 10g of the thin plates 10c are merely hooked on the upper surface of the rod 12f, when the thin plates 10c are moved downward, there is an obstacle below the thin plates 10c. When the lower end of the thin plate 10c contacts the obstacle, the hook between the rod 12f of the hook 12e and the thin plate 10c is released, and the thin plate 10c is placed on the obstacle. It has become.

Next, a method of cutting wood C by using a cutting machine B provided with the dust scattering prevention device A of the present embodiment will be described. First, the air cylinder 12c on the dust cover 10
Are moved backward, the thin plates 10c are moved upward, and the notch 10a of the dust cover 10 is opened.

Next, the stopper 8 is fitted into the groove 1d of the side walls 1b, 1c of the work table 1 corresponding to the length of the wood C to be cut. Then, the wood C to be cut is placed in the dust cover 10.
And is placed on the work table 1. Then, the end face is brought into contact with the side face of the stopper 8. In this state, the horizontal fixing unit 5 is operated to press the wood C against the rear side wall 1b to fix the position of the wood C and to make the length direction of the wood C parallel to the side wall 1b. Next, the vertical fixing unit 3 is operated to put the wood C on the work surface 1.
a, and the position of the wood C is similarly fixed.

Next, the piston 12d of the air cylinder 12c is moved until the lower end of each thin plate 10c contacts the work surface 1a.
Is advanced downward. At this time, the thin plates 10c, which were above the wood C, have their lower ends abutting 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, 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 1 d for the electric saw 6 of the work table 1 and moves into the lower cover 11, and is sucked from inside the lower cover 11 into the suction pipe 7. You.

Next, the electric saw 6 is operated to cut the wood C. Dust generated when the wood C is cut is not hindered mainly by the dust cover 10 and the thin plate 10c and does not scatter outside the dust cover 10. Also,
Dust that tends to scatter on the back side of the work table 1
1 will be blocked. And the dust cover 1
The dust remaining in the bottom cover 0 and the lower cover 11 is collected from the suction pipe 7 as described above. As described above, according to the dust scattering apparatus A of the present embodiment, dust generated when cutting an object to be cut such as wood C is covered with the dust cover 10.
And the thin plate 10c, so that no dust is scattered outside.

The dust cover 10 can easily install the wood C on the workbench 1 without interfering with 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 a narrow range around the moving range of the blade 6a protruding on the work surface 1, the volume inside the dust cover 10 can be reduced, and dust collection without a large suction force can be achieved. The dust in the dust cover 10 can be easily sucked by the device.

The dust scattering prevention device A of the present invention is not limited to the present embodiment, and specific components such as the shape and size of each member can be appropriately changed upon implementation. For example, the width of the work table 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 is cut is blocked by the dust cover and the thin plate, and the dust does not scatter outside. Also,
The dust cover and the thin plate can cover the moving range of the blade projecting on the work surface in a narrow range without disturbing the cutting of the wood, so that the volume in the dust cover is small,
The dust in the dust cover can be easily sucked even by a dust collector having no large suction force. In addition, the work table
Press the cut piece from the side to position the cut piece at the end of the notch
Because a cylinder to determine is provided,
Cut the object at the end of the notch, that is, when multiple thin plates begin to line up
Can be positioned at the first position. Accordingly
At least the part where multiple thin plates start to be lined
There is no gap between the piece and the thin plate, and dust
Spattering to the outside can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a cutting machine provided with a dust scattering prevention device of the 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 a main part showing a dust scattering prevention device, a horizontal fixing part and a vertical fixing part of the cutting machine.

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

FIG. 6 is a perspective view of a main part of the dust scattering prevention device with a part 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 Elevating means

Claims (1)

(57) [Claims] 1. A cutting machine for cutting an object to be cut such as wood fixed on a worktable by an electric saw blade protruding from below the worktable onto the worktable and moving in a cutting direction, The worktable is provided with a covered cylindrical dust cover that covers a moving portion of the blade on the upper surface thereof, and the dust cover is opened from the upper surface of the worktable and allows an object to be cut to be inserted into a cutting position. A notch is provided, and a plurality of vertically long thin plates are arranged so as to be able to move up and down in parallel along the side surface of the dust cover with almost no gap so as to shield the notch. The lifting means for moving the plate upward to open the cutout portion is detachably hooked on the upper side, and further,
On the work table, press the object to be cut from the side to
A cylinder for positioning is provided at an end of the notch.
Dust scattering prevention device characterized by there.