JP6585987B2 - Dust remover - Google Patents

Description

  The present invention relates to a dust removing device.

Conventionally, as a dust removing device that removes foreign matters such as dust and dust from a sheet-like workpiece, a pair of jet nozzles that jet ultrasonic air toward the surface of the traveling sheet-like workpiece and the pair of jet nozzles And a suction nozzle that is disposed in between and sucks foreign matter on the surface of the workpiece (see Patent Document 1).

Japanese Patent No. 2820599

  In the conventional dust remover, foreign matters such as dust that has been lightly laid on a flat and flat surface can be removed. However, the sheet-like workpiece edge (cutting edge) cut by the slitter blade has a problem that it cannot be removed because foreign matter such as slitter powder due to cutting is strongly attached, and a flat wide workpiece surface. Compared to the surface, there is a problem that it is difficult to efficiently remove foreign matter because the workpiece edge is a complicated part.

  Therefore, an object of the present invention is to provide a dust removing device that can reliably and efficiently remove foreign matters that are strongly adhered to the workpiece edge.

In order to achieve the above object, the present invention travels while giving a sheet tension in the traveling direction to a thin sheet-like workpiece made of plastic, paper or cloth having a thickness of 10 μm to 200 μm. by, a dust removing device for removing foreign matter adhering to the workpiece edge; comprises a dust removing head having a slit groove for the work edge travels passes; the dust removing head, both groove flanks of the slit groove Each having one side surface discharge hole for ejecting air toward the workpiece edge and two side surface suction holes for sucking air ejected from the side surface discharge hole ; suction holes, than the side discharge hole is disposed to separate the upstream and downstream side of the workpiece traveling direction; two suction total area of the side suction hole, the one ejection area of the side discharge hole Set below 400 times 0 times, configured to side suction total flow is less than 15 times 3 times or more aspects discharge flow rate; Furthermore, the groove bottom surface of the slit groove, the outermost of the workpiece edge One bottom surface discharge hole for ejecting air toward the edge, and two bottom surface suction holes for sucking air ejected from the bottom surface discharge hole ; It is arranged separately from the bottom surface discharge holes on the upstream side and the downstream side in the workpiece traveling direction ; the total suction area of the two bottom surface suction holes is 40 times or more the discharge area of one bottom surface discharge hole is set to 400 times or less, configured to bottom suction total flow is less than 15 times more than three times the bottom discharge flow rate; Furthermore, the total flow rate of the combined each side suction total flow of both groove flanks, the In the slit groove, consisting of the sum of the bottom suction total flow rate The total slit suction flow rate is 3 to 15 times the total slit discharge flow rate in the slit groove, which is the sum of the total discharge flow rate of the side surface discharges on both sides of the groove and the bottom discharge flow rate. It is comprised as follows.

According to the present invention, foreign matters such as slitter powder strongly adhering to the edge of a thin sheet-like workpiece can be reliably removed. Stable dust removal performance can be exhibited even with an edge having a complicated shape compared to the intermediate flat surface. There is no problem that the edge of the work comes into contact with the slit groove side surface of the dust removal head, the work can be prevented from being damaged and the dust can be removed continuously and efficiently.

It is a simplified top view which shows an example of the use condition of this invention. It is a top view which shows an example of a dust removal head. It is a side view which shows an example of a dust removal head. It is a front view which shows an example of a dust removal head. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a cross-sectional front view. It is a perspective view for demonstrating an effect | action. It is a sectional front view for explaining an operation. It is a cross-sectional front view for demonstrating the effect | action of a comparative example.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
As shown in FIG. 1, the dust removing apparatus according to the present invention is a base material such as a plastic film, paper, or cloth.
From 88, foreign materials such as slitter powder, dust, and dust are applied to the respective edges We and We of the plurality of strip-shaped workpieces W and W formed by cutting with a cutting means 80 having a plurality of slitter blades 81. Removal(
A plurality of dust removing heads 1 and 1 for dust removal) are provided.
The workpiece W is conveyed as a continuous band in the arrow Y direction by a conveyance unit (not shown) (the workpiece W travels as a continuous band in the workpiece traveling direction Y). The workpiece W is in the form of a thin sheet, and the thickness dimension is 10 μm to 200 μm.

2 and 3, the dust removing head 1 has a rectangular block-shaped head body 10, and an edge We () of a sheet-like workpiece W illustrated by a two-dot chain line on a front end surface 11 of the head body 10. A slit groove 2 through which the workpiece edge We) travels is recessed, and is connected to the base end surface 12 of the head body 10 via a suction pipe to negative pressure generating means such as a suction pump (not shown). Mouth 59 is established.
In addition, the dust removal head 1 includes a screw hole air supply port 39 opened on the outer surface (outer surface) 13 of the head body 10 and a pressure-feed air piping connection joint (plug) 19 screwed into the air supply port 39. I have.
The connection joint 19 is connected to a pressure air supply means such as a compressor or a pressure tank via an air pipe (not shown).

4 to 8, the slit groove 2 includes a pair of groove side surfaces 21 and 21 parallel to each other, and both groove side surfaces.
This is a U-shaped cross-section having a groove bottom surface (groove back surface) 20 in contact with the right and left sides 21 and 21 at right angles. Groove side
21 is arranged in parallel and face-to-face with the sheet-like workpiece edge We in the transport reference posture.
In FIG. 4, the work W is not shown, and in FIGS. 5 to 8, the work W is illustrated by a two-dot chain line.

The dust removal head 1 sucks air and foreign matter ejected from one circular side surface ejection hole 3 for ejecting air toward the workpiece edge We and the side surface ejection holes 3 in both groove side surfaces 21 and 21, respectively. Two circular side suction holes 5 and 5 for the purpose.
The side surface discharge holes 3 and the side surface suction holes 5 and 5 open in a direction orthogonal to the groove side surface 21.

The side surface discharge hole 3 is provided at the center position in the slit longitudinal direction.
The two side suction holes 5 and 5 are disposed separately from the side discharge holes 3 on the upstream side and the downstream side in the workpiece traveling direction Y.
That is, the two side surface suction holes 5 and 5 are disposed in the vicinity of the side surface discharge hole 3, and the side surface suction hole 5 on the slit upstream end 2 a side where the traveling workpiece edge We enters the slit groove 2 and the traveling side surface. The inner workpiece edge We consists of a side suction hole 5 on the side of the slit downstream end 2b that retreats from the slit groove 2.
The side surface discharge hole 3A provided in the groove side surface 21A of the slit groove 2 blows air onto the surface Wa of the workpiece edge We.
The side surface discharge hole 3B provided in the other groove side surface 21B of the slit groove 2 blows air onto the other surface Wb of the workpiece edge We.

Then, an upstream side suction hole 5A provided on one groove side surface 21A of the slit groove 2 and the slit groove 2
An upstream side suction hole 5B provided in the other groove side surface 21B, and a side surface discharge hole 3A provided in the one groove side surface 21A.
And a side discharge hole 3B provided in the other groove side surface 21B, and a downstream side suction hole 5C provided in the one groove side surface 21A.
The downstream side suction hole 5D provided in the other groove side surface 21B has the same position in the slit longitudinal direction and the position in the slit groove depth direction X.
That is, the side surface discharge hole 3A and the two side surface suction holes 5 provided on one groove side surface 21A of the slit groove 2 are provided.
A, 5C, the side surface discharge hole 3B and the two side surface suction holes 5B, 5D provided in the other groove side surface 21B are:
The slit groove 2 is provided symmetrically with respect to the slit reference plane S including the center line L in the width direction of the slit groove 2 and parallel to both groove side surfaces 21A and 21B (illustrated by a one-dot chain line in FIG. 4).

Further, the dust removing head 1 is ejected from the bottom surface discharge hole 4 and one circular bottom surface discharge hole 4 for ejecting air toward the groove bottom surface 20 toward the outermost edge Wg of the workpiece edge We. It has two circular bottom suction holes 6 and 6 for sucking air and foreign matter.
The bottom surface discharge hole 4 and the bottom surface suction holes 6 and 6 open in a direction orthogonal to the groove bottom surface 20.

The bottom surface discharge hole 4 is provided at the center position in the slit longitudinal direction.
The centers of the bottom surface discharge hole 4 and the two bottom surface suction holes 6 and 6 are disposed on the center line L in the width direction of the slit groove 2 (on the slit reference plane S) when viewed from the front (see FIG. 4).
The two bottom suction holes 6 and 6 are disposed separately from the bottom surface discharge hole 4 on the upstream side and the downstream side in the workpiece traveling direction Y.
That is, the two bottom surface suction holes 6 and 6 are disposed in the vicinity of the bottom surface discharge hole 4 and include a bottom surface suction hole 6A on the slit upstream end 2a side and a bottom surface suction hole 6B on the slit downstream end 2b side.

The upstream side suction holes 5A and 5B, the upstream bottom suction hole 6A, and the side discharge holes 3 are provided.
A, 3B and bottom surface discharge hole 4, downstream side suction holes 5C, 5D and downstream side suction hole 6B,
Is the same position in the slit longitudinal direction.

The side surface discharge hole 3 and the bottom surface discharge hole 4 communicate with the air supply port 39 (connection joint 19) through a common discharge flow path 30 in the head body 10.
The side suction hole 5 and the bottom suction hole 6 communicate with the suction connection port 59 via a common suction channel 50 in the head body 10.

The discharge (opening) area of the side surface discharge hole 3 and the discharge (opening) area of the bottom surface discharge hole 4 are formed to be equal.
Further, that has ejection suction (opening) area and a bottom suction hole 6 of the side suction holes 5 (opening) area equally formed.

Further, the total suction area of the two side surface suction holes 5 and 5 is 40 times or more and 400 times or less, preferably 40 times or more and 250 times or less, than the discharge area of one side surface discharge hole 3 in each of the groove side surfaces 21 and 21. The side suction total flow rate is set to be larger than the side discharge flow rate.

More specifically, the side suction total flow rate is larger than the side discharge flow rate. More specifically, the side suction total flow rate is 3 to 15 times, preferably 5 to 10 times the side discharge flow rate. To. In this way, it is possible to surely prevent the workpiece W from approaching the groove side surface 21 where the workpiece W may come into contact with the groove side surface 21 while it is possible to reliably blow off the foreign matter from the workpiece W.

In addition, the total suction area of the two bottom surface suction holes 6, 6 is 40 of the discharge area of one bottom surface discharge hole 4.
The bottom suction total flow rate is set to be larger than the bottom surface discharge flow rate by setting the number of times to 400 times or more and preferably 40 times to 250 times.

More specifically, the bottom suction total flow rate is larger than the bottom discharge flow rate. More specifically, the bottom suction total flow rate is 3 to 15 times, preferably 5 to 10 times the bottom discharge flow rate. Like that.

Also, the total slit suction flow rate in the slit groove 2 ( the sum of the total suction flow rates of the side surfaces 21 and 21 of both grooves and the bottom suction total flow rate) is the total slit discharge rate in the slit groove 2. The flow rate is 3 to 15 times, preferably 5 to 10 times the flow rate ( the sum of the total flow rate of each side surface 21 and 21 and the bottom surface discharge flow rate).
Further, the discharge flow rates of the side surface discharge hole 3A on the one groove side surface 21A side and the side surface discharge hole 3B on the other groove side surface 21B are the same.

Further, it is preferable to supply compressed air of 100 kPa or more and 500 kPa or less to the connection joint 19 (air supply port 39) to eject (discharge) air from the side surface discharge hole 3 and the bottom surface discharge hole 4.
The suction connection port 59 is preferably sucked (evacuated) at -10 kPa or more and -3 kPa or less to suck air from the side suction holes 5 and the bottom suction holes 6.

For example, the diameters of the side suction holes 5 and the bottom suction holes 6 are 5 mm, the diameters of the side discharge holes 3 and the bottom discharge holes 4 are 0.5 mm, and the total suction area of each of the groove side faces 21 and 21 is 200 of the discharge area. And the suction total area at the groove bottom surface 20 is set to 200 times the discharge area, 200 kPa of compressed air is supplied to the connection joint 19 to eject air from the side surface discharge hole 3 and the bottom surface discharge hole 4, The suction connection port 59 is sucked (evacuated) at -5 kPa to suck air from the side suction hole 5 and the bottom suction hole 6, and the side suction total flow rate is 5 times the side discharge flow rate at both side surfaces 21 and 21. In addition, the bottom suction total flow rate at the groove bottom surface 20 is set to be five times the bottom surface discharge flow rate.

The head body 10 includes two groove side surface discharge channels 31, 31 (31A, 31B) provided from the common discharge channel 30 to the vicinity of the front end surface 11 of the head body 10 through the vicinity of the slit groove 2. A groove bottom surface discharge channel 32 provided from the common discharge channel 30 to the vicinity of the groove bottom surface 20.
Two side surface discharge holes 3A and 3B are respectively provided in a one-to-one relationship with the two groove side surface discharge channels 31A and 31B.
And are connected in an orthogonal manner. The groove side surface discharge channel 31 has a circular cross section,
The diameter dimension is set larger than the diameter dimension of the side surface discharge hole 3.
Further, the bottom surface discharge hole 4 is coaxially connected in communication with the tip of the groove bottom surface discharge channel 32. The groove bottom surface discharge channel 32 has a circular cross section, and has a diameter dimension larger than that of the bottom surface discharge hole 4.

The head body 10 includes four groove side surface suction channels 51, 51, 51, 51 (51A, 51B, 51C, 51D) provided from the common suction channel 50 to the vicinity of the front end surface 11 of the head body 10. Two groove bottom suction channels 52 and 52 (see FIG. 5) provided from the common suction channel 50 to the vicinity of the groove bottom 20;
have.
The four side surface suction holes 5A, 5B, 5C, and 5D are connected to each of the four groove side surface suction channels 51A, 51B, 51C, and 51D in a one-to-one correspondence and connected in an orthogonal manner.
The groove side suction channel 51 has a circular cross section, and the diameter dimension is set to be the same as the diameter dimension of the side suction hole 5.
In addition, two bottom suction holes 6A and 6B are provided at the tips of the two groove bottom suction channels 52A and 52B, respectively.
Each of them is connected in a coaxial manner in a one-to-one correspondence. The groove bottom suction channel 52 has a circular cross section and has the same diameter as that of the bottom suction hole 6.

In the present invention, the design can be changed, and the outer shape of the head body 10 may be a short cylindrical shape in which the diameter is substantially reduced or gradually reduced toward the tip side. An air supply port 39 may be provided on the base end surface 12 of the head body 10. The outer surface (outer surface or outer circumferential surface) 13 of the head body 10 to open the suction connection opening 59 also has good.

Next, the operation (usage method) of the dust removing apparatus of the present invention will be described.
As shown in FIG. 5 to FIG. 8, when the workpiece edge We runs in the slit groove 2, foreign matter such as slit powder and dust is removed from the workpiece W by the compressed air injected from the side surface discharge hole 3 and the bottom surface discharge hole 4. Blow away and separate. Further, the foreign matter separated from the blown air and the work W is sucked in the side suction holes 5 and the bottom face suction holes 6, and the foreign matters are removed from the workpiece edge We without scattering the foreign matters around.
Further, as shown in FIG. 9, air suction and air ejection are performed on both surfaces (front and back surfaces) Wa and Wb and the outermost edge Wg of the workpiece edge We from the upstream side to the downstream side in the workpiece traveling direction Y. Air suction works sequentially.

Here, as shown in FIG. 8, the workpiece edge We conveyed at the conveyance reference position travels in the center position (on the slit reference plane S in FIG. 4) in the groove width direction Z of the slit groove 2. A dust removal head 1 is fixed. However, the workpiece edge We is displaced from the conveyance reference position due to vibration or vibration during travel, change in sheet tension, etc., and as shown in FIG. 10, on the slit reference plane S (on the width direction center line L). Therefore, the workpiece edge We may approach either one of the groove side surfaces 21 and 21 (in the example shown in the drawing, it approaches the one groove side surface 21A). When the workpiece W travels while swinging in one direction in the slit groove width direction Z in this way, there is a possibility that the groove W will be in sliding contact (contact) and damaged.

However, when the workpiece edge We approaches the one-groove side surface 21A, the workpiece edge We and the one-groove side surface 21
Two side suction holes 5A provided in one groove side surface 21A become narrower (becomes difficult to suction),
The total suction flow rate of 5C decreases, and the space between the workpiece edge We and the other groove side surface 21B becomes wider (
The total suction flow rate of the two side surface suction holes 5B and 5D provided in the other groove side surface 21B increases.
In other words, the suction flow velocity on the side surface 21A of the one groove is decreased and the suction flow rate on the side surface 21B of the other groove is increased, and the workpiece edge We is drawn toward the other groove side surface 21B side by Bernoulli's law (theorem). Contact with the groove side surface 21A is prevented.

And the suction flow velocity between the workpiece edge We and the one groove side surface 21A, the workpiece edge We and the other groove side surface
On the reference plane S (the center in the width direction), the workpiece edge We is gradually swung (attenuated) while swinging in the slit groove width direction Z so that the suction flow rates between 21B are the same (balanced). Drive on line L). Alternatively, the workpiece edge We is centered on the reference plane S and the slit groove width direction (
(Thickness direction of workpiece) Extreme approach (bias) that may cause contact with groove side surface 21 while swinging in Z
Travel without having to.

For example, as in the dust removal head 9 of the comparative example shown in FIG. 11, when only the side surface discharge holes 93 are provided on both side surfaces 91, 91 of the slit groove 92 (the side suction holes 5 are not provided) Work edge W
When e approaches the groove side surface 91A from the reference plane S, the space between the workpiece edge We and the groove side surface 91A becomes narrower and flows toward both ends 92a and 92b of the slit groove 92 (on the side of the groove side 91A). As the discharge flow rate becomes faster, the gap between the workpiece edge We and the other groove side face 91B becomes wider and both ends of the slit groove 92
The discharge flow velocity (on the other groove side surface 91B side) flowing toward 92a, 92b becomes slow, and the workpiece edge We is held in an extremely attracted state on the one groove side surface 91A by Bernoulli's law. If it swings slightly, it contacts the one groove side surface 91A and the work W is damaged.

Here, in FIG. 10, when the work W moves in the slit groove width direction Z, the flow velocity of the air blown from the side surface discharge holes 3 and 3 changes, but both sides of the side surface discharge holes 3 and 3. Since the side suction holes 5 and 5 are provided in the vicinity, the blown air is sucked into the side suction holes 5 and 5 immediately after flowing so as to come into contact with the work edge We, and the flow velocity of the blown air becomes the work end. The range acting on the edge We becomes sufficiently small (compared to the comparative example of FIG. 11).
Therefore, the flow velocity of the blown air has a very small influence on the workpiece W as compared with the flow velocity of the suction air, and the pulling action of the workpiece edge We occurs due to a change in the flow velocity of the suction air.

When the magnification of the side suction total area (side suction total flow) with respect to the side discharge area (side discharge flow) described above or the magnification of the slit suction total flow with respect to the slit discharge total flow is less than the lower limit, the workpiece edge When We swings in the slit groove width direction Z, there is a high possibility that the change in the flow velocity of the blown air will adversely affect the workpiece edge We. If the upper limit is exceeded, the balance between the blown air and the suction air is lost and the workpiece is broken. The running of the edge We tends to become unstable, and there is a possibility that the foreign matter blowing off (peeling) effect is reduced by the blown air.

As described above, the dust removing apparatus of the present invention includes the dust removing head 1 having the slit groove 2 for the sheet-like workpiece edge We to pass through, and the dust removing head 1 includes both side surfaces 21 of the slit groove 2,
In each case, one side discharge hole 3 for ejecting air toward the workpiece edge We, and
It has two side suction holes 5 and 5 for sucking air ejected from the side discharge holes 3, and the two side suction holes 5 and 5 are located upstream of the side discharge holes 3 in the workpiece traveling direction Y. The total suction area of the two side suction holes 5 and 5 is set to be 40 times or more and 400 times or less than the discharge area of the one side discharge hole 3. Since it is configured to be larger than the side surface discharge flow rate, foreign matters such as slitter powder strongly adhering to the workpiece edge We can be reliably removed. Stable dust removal performance can be achieved even with an edge having a complicated shape compared to only the intermediate flat surface. There is no problem that the work edge We comes into contact with the groove side surface 21 of the slit groove 2 of the dust removing head 1, damage to the work W can be prevented and dust removal can be performed continuously and efficiently. The substrate as shown in FIG. 1 does not cause any problems due to the dust removal process (dust removal device).
In the cutting step 88, the substrate 88 can be continuously cut without stopping the cutting.

  Further, since the side suction total flow rate is configured to be not less than 3 times and not more than 15 times the side surface discharge flow rate, the workpiece W may come into contact with the groove side surface 21 while the foreign matter can be surely blown off from the workpiece W. It is possible to reliably prevent the approach (adverse effect) to the extreme groove side surface 21 with a gap.

Moreover, since the side surface discharge hole 3 and the side surface suction hole 5 are circular, it can be easily processed, the opening area can be set with high accuracy, and the high-quality dust removal head 1 can be obtained.

DESCRIPTION OF SYMBOLS 1 Dust removal head 2 Slit groove 3 Side surface discharge hole 4 Bottom surface discharge hole 5 Side surface suction hole 6 Bottom surface suction hole
20 Groove bottom
21 Groove side We Work edge Wg Outermost edge Y Work direction

Claims (1)

A thin sheet of plastic, paper or cloth with a thickness of 10 μm to 200 μm, and a continuous belt-shaped workpiece (W) is run while applying a sheet tension in the running direction, and the workpiece edge (We) A dust removing device for removing foreign matter adhering to
A dust removal head (1) having a slit groove (2) through which the workpiece edge (We) passes;
The dust removing head (1) has one side surface discharge hole (3) for ejecting air toward the work edge (We) on each of the groove side surfaces (21) (21) of the slit groove (2). ), And two side suction holes (5) and (5) for sucking air ejected from the side discharge holes (3),
The two side suction holes (5) and (5) are disposed separately from the side discharge holes (3) on the upstream side and the downstream side in the workpiece traveling direction (Y).
The total suction area of the two side suction holes (5) (5) is set to be 40 times or more and 400 times or less than the discharge area of the one side discharge hole (3), and the side suction total flow rate is set to the side discharge flow rate. Configured to be 3 times or more and 15 times or less,
Furthermore, one bottom surface discharge hole (4) for ejecting air to the groove bottom surface (20) of the slit groove (2) toward the outermost edge portion (Wg) of the workpiece edge (We), And two bottom surface suction holes (6) and (6) for sucking air ejected from the bottom surface discharge hole (4),
The two bottom suction holes (6) and (6) are disposed separately from the bottom surface discharge hole (4) on the upstream side and the downstream side in the workpiece traveling direction (Y),
The total suction area of the two bottom suction holes (6) and (6) is set to be 40 times or more and 400 times or less than the discharge area of one bottom discharge hole (4), and the bottom suction total flow rate is the bottom discharge flow rate. Configured to be 3 times or more and 15 times or less,
Furthermore, the slit suction total flow rate in the slit groove (2), which is the sum of the total flow rate of the side suction total flow rates of the side surfaces (21) and (21) of the both grooves and the bottom suction total flow rate,
The total flow rate of the side surfaces of the grooves (21) and (21) and the sum of the flow rates of the side surfaces and the sum of the bottom surface discharge rate, and the total flow rate of slit discharge in the slit groove (2),
A dust removing device configured to be 3 times or more and 15 times or less.

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