JP6745557B2 - Gas discharge nozzle and carrier - Google Patents

Description

The present invention relates to a gas discharge nozzle for discharging a high-pressure gas, which forms a laminar flow gas along a predetermined discharge direction, and a laminar flow gas discharged from the gas discharge nozzle. The present invention relates to a transfer device that improves the transfer performance of objects.

As a method for removing droplets adhering to the surface of the transported object being transported, a gas ejection nozzle for ejecting high-pressure gas such as compressed air onto the surface of the transported object is used. For example, there is a device in which high-pressure air is blown from a gas discharge nozzle called an air knife to a cylindrical container being conveyed to remove water from a predetermined region of the container (for example, refer to Patent Document 1).

The high-pressure air discharged from the air knife toward the container being conveyed may affect the posture of the container. Therefore, the air knife is positioned so as to maintain a predetermined angle with respect to the container.

JP, 6-171635, A

However, the conventional gas discharge nozzle has only the purpose of removing droplets from the object to be conveyed, and does not consider the conveying performance of the conveying device. For this reason, the conventional gas discharge nozzles cannot not only contribute to the conveyance of the conveyed object, but also the high-pressure gas ejected from the air knife toward the conveyed object may cause a conveyance load and deteriorate the conveyance performance. is there.

An object of the present invention is to provide a gas discharge nozzle and a carrier device that can contribute to improving the carrier performance of the carrier device by forming a laminar gas along the discharge direction of high-pressure gas.

The gas discharge nozzle according to the present invention includes a laminar flow passage surface formed along the longitudinal direction excluding a predetermined range on the one end side of the upper surface, and an inclined surface inclined toward the lower surface side in the predetermined range on the one end side. A space portion having an inflow port through which high-pressure air flows from the outside, the space portion being open to the upper surface within the shape range of the inclined surface, and the high-pressure gas in the space portion to the laminar flow passage surface. A main body in which a slit for discharging toward is formed, and a cover that covers the upper surface side of the space portion, and the slit is formed between the space portion and the laminar flow passage surface in the main body. The first surface, which is the formed first surface, is continuous to the laminar flow passage surface at a predetermined laminar flow formation angle at which the high-pressure gas discharged toward the laminar flow passage surface becomes a laminar flow in the longitudinal direction along the laminar flow passage surface. And a second surface, which is a lower surface of the cover and which is parallel to the first surface and is located outside the main body with respect to the first surface, intersects with a slope in the longitudinal direction. And the opening on the side of the laminar flow passage surface along the direction orthogonal to the longitudinal direction, and the portion of the cover outside the second surface is the extension line of the laminar flow passage surface. Located on the first surface side, the inflow port communicates with the space from the lower surface of the main body.

The high-pressure gas discharged from the slit forms a laminar flow along the surface of the laminar flow passage surface, and attracts outside air located in a portion in contact with the laminar flow into the laminar flow as a secondary gas. The high-pressure gas discharged from the slit is amplified by the attracted secondary gas, and a gas flow of a larger amount than the discharge amount is formed along the surface of the laminar flow surface from the slit toward the downstream side in the discharge direction. Since the portion of the main body outside the second surface is located on the first surface side with respect to the extension line of the laminar flow passage surface continuous with the first surface, the slit should not project to the surface side of the laminar flow passage surface. Can be placed.

A carrier device of the present invention includes the above-described gas discharge nozzle and gas supply device. The gas supply device supplies high pressure gas to the gas discharge nozzle. The surface of the gas discharge nozzle is arranged along the transport direction of the transported object.

The laminar flow direction formed by the high-pressure gas discharged from the slit of the gas discharging nozzle along the laminar flow passage surface is parallel to the transport direction of the transported object. When the laminar flow direction of the high-pressure gas is made to coincide with the transport direction of the transported object, an air flow of a large amount of gas formed along the transport direction of the transported object contributes to the transportation of the transported object. When the laminar flow direction of the high-pressure gas is opposite to the transport direction of the transported object, the rotational force can be supplied to the transported object being transported. Since the slit does not project to the laminar flow passage surface, even when a plurality of gas ejection nozzles are continuously arranged in the conveyance direction, the object to be conveyed is conveyed using the laminar flow passage surface as a guide in the conveyance direction.

According to the present invention, by forming the laminar gas along the gas discharge direction, it is possible to contribute to the improvement of the transport performance of the transported object in the transport device. The slit for discharging the high-pressure gas can be arranged so as not to project to the laminar flow passage surface, and the laminar flow passage surface can be used as a guide for the transported object.

(A) And (B) is a side sectional view and a top view of a gas discharge nozzle concerning an embodiment of the present invention. (A) And (B) is a side view and a top view explaining a discharge state of gas by the same gas discharge nozzle. It is a side surface expanded sectional view of the principal part of the gas discharge nozzle. (A)-(D) is the figure seen from the discharge direction of the high pressure gas explaining the shape of the nozzle for gas discharge which concerns on another embodiment of this invention. FIG. 5 is a side sectional view showing a usage state of the gas discharging nozzle according to the embodiment shown in FIG. 4(D). It is a top view of the conveyance apparatus which concerns on embodiment of this invention. It is a top view of the 1st modification of the conveying apparatus which concerns on embodiment of this invention. It is a top view of the 2nd modification of the conveying apparatus which concerns on embodiment of this invention. It is a side view of the 3rd modification of the conveying apparatus which concerns on embodiment of this invention. It is a side view of the 4th modification of the conveyance apparatus which concerns on embodiment of this invention.

Hereinafter, a gas discharge nozzle and a transfer device according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1(A) and 1(B), a gas discharge nozzle 10 according to an embodiment of the present invention is, as an example, a metal or resin main body 1 that is a solid elongated body having a rectangular cross section. , The slit 2 and the laminar flow passage surface 3 are formed. The upper surface of the main body 1 is a planar laminar flow passage surface 3 except for a predetermined range on one end side. A predetermined range on one end side of the upper surface of the main body 1 is an inclined surface 11 inclined toward the lower surface side of the main body 1 at a predetermined laminar flow forming angle with respect to the laminar flow passage surface 3. A part of the inclined surface 11 on the laminar flow passage surface 3 side is formed with an inclined surface 12 located on the lower surface side of the main body 1 with respect to the inclined surface 11. The inclined surface 12 corresponds to the first surface of the present invention. The laminar flow passage surface 3 is continuous with the inclined surfaces 11 and 12 at a predetermined laminar flow formation angle via an arc. The laminar flow forming angle can be appropriately selected within the range of 5° to 35°.

Note that the arc portion between the laminar flow passage surface 3 and the inclined surfaces 11 and 12 may be omitted, provided that the laminar flow passage surface 3 can form a laminar flow.

A thin plate-shaped metal or resin cover 4 is fixed to the inclined surface 11 from the upper surface side of the main body 1. The cover 4 can be fixed to the main body 1 by a screw or an adhesive agent (not shown), but is not limited thereto, and when the main body 1 and the cover 4 are made of metal, they can be fixed to the main body 1 by welding. .. A predetermined area of the upper surface 41 of the cover 4 on the laminar flow passage surface 3 side is inclined so as to form a wedge shape with the lower surface 42 of the cover 4. The lower surface 42 of the cover 4 corresponds to the second surface of the present invention.

The main body 1 has a space 5 open to the upper surface within the shape range of the inclined surface 11. When the lower surface 42 is fixed in close contact with the inclined surface 11, the cover 4 covers the upper surface side of the space 5. At this time, a gap having an opening on the laminar flow passage surface 3 side is formed between the lower surface 42 of the cover 4 and the inclined surface 12, and this gap is made into the slit 2. Therefore, the slit 2 is formed between the lower surface 42 and the inclined surface 12 at the upper part of the side surface 51 of the space portion 5 on the laminar flow passage surface 3 side. The opening-side end of the lower surface 42 is located closer to the inclined surface 12 than the laminar flow passage surface 3. Therefore, the entire cover 4 is located below the laminar flow passage surface 3 and does not project above the laminar flow passage surface 3.

The bottom surface 52 of the space 5 is formed with a screw hole 53 penetrating the lower surface of the body 1. The slit 2 and the screw hole 53 are formed on different surfaces of the space 5. The screw hole 53 corresponds to the inflow port of the present invention. The screw portion of the connecting device 6 is screwed into the screw hole 53 from below. The connecting device 6 includes an axial through hole 61. High-pressure gas containing compressed gas is supplied into the space 5 from a supply device (not shown) via the through hole 61 and the screw hole 53.

The high-pressure gas supplied into the space 5 through the through hole 61 and the screw hole 53 is discharged from the slit 2 between the lower surface 42 and the inclined surface 12, and is indicated by a chain double-dashed arrow in FIG. As shown by, the laminar flow is formed along the laminar flow passage surface 3 while taking in the outside air, and is separated from the slit 2.

As shown in FIGS. 2A and 2B, as an example, the laminar flow forming angle is 16°, the width of the main body 1 is 30 mm, and the height of the slit 2 (the distance between the inclined surface 12 and the lower surface 42. In the gas discharge nozzle 10 in which the width of the slit 2 is 0.5 mm and the width of the slit 2 is mm, when a high pressure gas of 0.8 MPa is supplied to the space 5, the width of the main body 1 is from the slit 2 to about 175 mm. The airflow along the laminar flow passage surface 3 having a height of 5 mm is maintained. At a position separated from the slit 2 by 475 mm, the width of the airflow is about 150 mm and the height of the airflow is about 50 mm.

The size of each part is not limited to this. For example, the laminar flow forming angle can be selected in the range of 5° to 35°, and the width of the main body 1 can be selected in the range of 10 to 100 mm. ..

The high-pressure gas discharged from the slit 2 is increased by attracting the outside air as a secondary gas to form a larger amount of air flow than the discharge amount. By this air flow, for example, a lightweight object to be conveyed such as a sheet can be suspended from the surface of the laminar flow passage surface 3 along the direction of arrow C and conveyed. By arranging a plurality of gas discharge nozzles 10 having a length of the laminar flow passage surface 3 of about 150 mm in succession along the direction of arrow C, it is possible to stabilize the object to be conveyed over a desired conveying distance with the above-described dimensions and pressure. Can be transported.

When the laminar flow gas formed by the gas discharge nozzle 10 is used to assist the conveyance of the object to be conveyed, the length of the laminar flow passage surface 3 can be set to about 450 mm. The laminar flow passage surface 3 can be used as a conveyance guide. Since the slit 2 does not project to the outside of the laminar flow passage surface 3, the slit 2 does not hinder the conveyance even when a plurality of gas ejection nozzles 10 are continuously arranged in the conveyance direction.

Further, when the gas discharge nozzle 10 is used for the purpose of removing the liquid droplets adhering to the surface of the transported object being transported, the high-pressure gas discharged from the slit 2 may assist the transportation while simultaneously removing the liquid droplets. It is possible to improve the transportation efficiency.

Furthermore, since the high-pressure gas discharged from the slit 2 attracts the outside air as the secondary gas, it can be used as a gas transfer device such as an exhaust device.

The laminar flow passage surface 3 does not have to be formed integrally with the main body 1, and may be formed as a separate component provided that it is continuous with the first surface forming the slit 2 at the laminar flow formation angle. ..

As shown in FIG. 3, the height of the slit 2 may be adjustable by making the cover 4 slidable along the upper surface of the main body 1. After fixing the screw part of the fixing screw 7 through the long hole 43 formed in the cover 4, the fixing screw 7 is screwed into the screw hole 14 of the mounting surface 13, and the head of the fixing screw 7 presses the cover 4 onto the mounting surface 13 to fix it. To do.

As shown in FIGS. 4(A) to 4(D), the laminar flow passage surface 3 is not limited to a flat surface, and a high pressure gas such as the laminar flow passage surfaces 103 to 403 may be formed depending on the shape of the transported object. The cross-sectional shape orthogonal to the discharge direction (transporting direction of the transported object) may be arcuate, rectangular or angular concave cross-section, or tubular, and the slits 102 to 402 may be shaped accordingly.

Further, the laminar flow passage surface 3 does not necessarily have to be a straight line in a cross section parallel to the discharge direction of the high pressure gas, and can be curved within a range in which the laminar flow of the high pressure gas is not separated.

The gas discharge nozzle 410 shown in FIG. 5 includes a cylindrical main body 401. A large diameter portion and a small diameter portion are formed on the outer peripheral surface of the main body 401 with an inclined surface 412 at an intermediate portion in the axial direction interposed therebetween, and the large diameter portion is a cylindrical laminar flow passage surface 403. The laminar flow passage surface 403 is continuous with the inclined surface 412 corresponding to the first surface of the present invention at a predetermined laminar flow formation angle. The inner peripheral surface of the main body 401 is reduced in diameter from the small diameter portion side toward the intermediate portion, and then expanded toward the end portion on the large diameter portion side, and the cross section including the axis is between the laminar flow passage surface 403. It has a wedge shape.

In the small diameter portion of the outer peripheral surface of the main body 401, a concave space portion 405 is formed over the entire circumference in a part in the axial direction, and a cylindrical cover 404 that covers the space portion 405 is externally fitted. An inclined surface 442 corresponding to the second surface of the present invention is formed at one end of the inner peripheral surface of the cover 404 at the same angle as the inclined surface 412. A slit 402 is formed between the inclined surface 412 and the inclined surface 442 over the entire circumference of the cover 401. The cover 404 is formed with a through hole 53 that communicates the space portion 405 to the outside at least at one location on the peripheral surface.

A threaded portion 411 with which an adjustment nut 412 is screwed is formed at the end of the small diameter portion of the outer peripheral surface of the main body 401. The adjustment nut 412 is rotatably fixed to the end of the cover 404 opposite to the inclined surface 412. By rotating the adjustment nut 412 screwed into the screw portion 411 in the forward and reverse directions, the cover 404 moves forward and backward in the axial direction, and the distance between the inclined surface 412 and the inclined surface 442 is adjusted.

When a high-pressure gas is supplied to the space portion 405 via the through hole 453 in a state where a part of the laminar flow passage surface 403 is inserted into the cylindrical object to be processed 400, the high-pressure gas is inclined to the inclined surface 412 and the inclined surface 412. A laminar flow is formed along the surface of the laminar flow passage surface 403 while attracting the outside air discharged from the slit 402 between the 442 and 442 and located outside the cover 404. When this laminar flow reaches the end of the main body 1 on the large diameter side, the object to be processed is further attracted to the outside air located outside the end of the main body 1 on the small diameter side via the inside of the main body 1. A laminar flow is formed along the inner peripheral surface of 400. Since a large amount of gas flows along the inner peripheral surface of the object to be processed 400, the droplets attached to the inner peripheral surface of the object to be processed 400 can be reliably removed.

As shown in FIG. 6, the carrier device 100 according to the first embodiment of the present invention includes a gas discharge nozzle 10, a conveyor 101, a compressed air pump 102, and an adjustment valve 103. The conveyor 101 continuously conveys the columnar object C mounted on the upper surface in the conveyance direction X.

The gas discharge nozzle 10 has the configuration shown in FIGS. 1 and 2. The pair of gas discharge nozzles 10 are arranged in parallel with each other with the conveyor 101 sandwiched between the laminar flow passage surfaces 3 facing each other. In addition, each of the gas discharge nozzles 10 is arranged along the transport direction X on the respective laminar flow passage surfaces 3. The distance between the laminar flow passage surfaces 3 of the pair of gas ejection nozzles 10 is substantially equal to the diameter of the transported object C. The gas discharge nozzle 10 is arranged such that the end on the slit 2 side is located on the upstream side in the transport direction X.

The compressed air pump 102 includes a so-called compressor, and supplies high pressure air obtained by compressing outside air to the gas discharge nozzle 10 via the adjustment valve 103. The compressed air pump 102 corresponds to the gas supply device of the present invention, and the adjusting valve 103 also corresponds to the pressure adjusting mechanism. The compressed air pump 102 is not limited to one that supplies high-pressure air, but may be one that supplies a high-pressure gas other than air provided that the environment and safety at the installation location of the carrier device 100 are ensured. it can.

In the example shown in FIG. 6, each of the pair of gas discharge nozzles 10 is individually provided with the compressed air pump 102 and the adjustment valve 103, but from the single compressed air pump 102 through the single or individual adjustment valve 103. High pressure air may be supplied to each of the pair of gas discharge nozzles 10.

The high-pressure air supplied from the compressed air pump 102 to the gas discharge nozzle 10 via the adjustment valve 103 is discharged from the slit 2 and attracts the outside air around the slit 2 while generating a large amount of air along the laminar flow passage surface 3. It becomes a laminar flow and flows from the upstream side to the downstream side in the transport direction X (see the two-dot chain line arrow in the figure).

Since the air flow direction of the laminar flow formed on the laminar flow passage surface 3 of the gas discharge nozzle 10 coincides with the transport direction X of the transported object C by the conveyor 101, the transported object C is faster than the transport speed of the conveyor 101. And moves along the transport direction X. Since the laminar flow passage surfaces 3 of the pair of gas discharge nozzles 10 are arranged in parallel to each other with the conveyor 101 interposed therebetween, the conveyance direction of the conveyed object C can be defined as a conveyance guide, and the conveyed object C Does not deviate from the conveyor 101. The droplets adhering to the surface of the transported object C are removed by the laminar flow of high-pressure air formed on the laminar flow passage surface 3 of the gas ejection nozzle 10.

Since the laminar flow passage surfaces 3 of the pair of gas discharge nozzles 10 are arranged in parallel to each other with the conveyor 101 interposed therebetween, the conveyance direction of the conveyed object C can be defined as a conveyance guide, and the conveyed object C Does not deviate from the conveyor 101. The droplets adhering to the surface of the transported object C are removed by the laminar flow of the high-pressure gas formed on the laminar flow passage surface 3 of the gas ejection nozzle 10.

By changing the supply amount of high-pressure air to each gas discharge nozzle 10 by the adjustment valve 103, the conveyed object C being conveyed can be rotated by the conveyor 101. For example, if the supply amount of high-pressure air to the gas discharge nozzle 10 on the upper side in FIG. 6 is smaller than the supply amount of high-pressure air to the gas discharge nozzle 10 on the lower side in FIG. 6, the transported object C rotates in the direction of arrow R. To do. By this rotation, droplets can be removed from the entire circumference of the transported object C.

As shown in FIG. 7, by providing the transport guide 104 instead of one of the gas discharge nozzles 10, the transported object C can be rotated in the direction of the arrow R, and the entire circumferential surface of the transported object C can be obtained. A laminar flow of high pressure air can be contacted.

Further, as shown in FIG. 8, for gas ejection from the downstream side to the upstream side in the transport direction X of the transported object C, depending on the size and shape of the transported object C, the attachment state of droplets on the peripheral surface, and the like. High-pressure air can be discharged from the slit 2 of the nozzle 10 along the laminar flow passage surface 3. Although the transport speed of the transported object C is reduced, the transported object C can be reliably rotated in the direction of the arrow R′, and the conveyor 101 is provided to remove the droplets from the entire peripheral surface of the transported object C. It is not necessary to provide a rotation mechanism for the transported object C.

Further, as shown in FIG. 9, a plurality of gas ejection nozzles 10 may be arranged side by side in the height direction of the object C to be conveyed with an inclination with respect to the direction orthogonal to the conveying direction X. The laminar high-pressure air ejected from each slit 2 of the plurality of gas ejection nozzles 10 along each laminar flow passage surface 3 can reliably rotate the transported object C having a relatively heavy weight.

Further, as shown in FIG. 10, the tank 502 may be formed on the upper surface of the cover 4 by the sub-cover 501, and the tank 502 may be provided with the socket 503 and the liquid nozzle 505. A cleaning liquid such as water is introduced into the tank 502 from the outside via the socket 503. The liquid nozzle 505 is arranged such that its tip portion is close to the slit 2. When the high-pressure gas supplied to the space 5 through the connecting device 6 is discharged from the slit 2, the surroundings of the tip of the liquid nozzle 505 are made negative, and the cleaning liquid in the tank 502 is used for liquid. It is sucked out via the nozzle 505. The cleaning liquid sucked from the liquid nozzle 505 is ejected along with the laminar high-pressure gas along the laminar flow passage surface 3 to clean the transported object.

The sub-cover 501 can be fixed to the upper surface of the cover 4 by a method suitable for the material, such as adhesion, screwing, or welding. The amount of protrusion of the sub-cover 501 toward the upper surface side of the cover 4 should be as small as possible in consideration of the transportability of the transported object.

It should be noted that the above embodiments are all examples, and the present invention is not limited to these, and various modifications can be made within the scope of the present invention. For example, the laminar flow passage surface 3 may be curved in the range in which the laminar flow does not separate in the discharge direction of the high-pressure gas.

1-Main Body 2-Slit 3-Laminar Flow Passing Surface 4-Cover 5-Space 10-Gas Discharge Nozzle 12-Inclined Surface (First Surface)
42-bottom surface (second surface)
53-Screw Hole (Inlet)
100, 200, 300-Transfer device 102-Compressed air pump (gas supply device)
103-Adjusting valve (pressure adjusting mechanism)
C-object to be transported

Claims (4)

A laminar flow passage surface formed along the longitudinal direction excluding a predetermined range on the one end side of the upper surface, an inclined surface inclined toward the lower surface side in the predetermined range on the one end side, and a flow into which high-pressure air flows from the outside. A space part having an inlet and a space part open to the upper surface within the shape range of the inclined surface, and a slit for discharging high-pressure gas in the space part toward the laminar flow passage surface is formed. Body,
A cover that covers the upper surface side of the space portion,
The slit is a first surface formed between the space in the main body and the laminar flow passage surface, and the high-pressure gas discharged toward the laminar flow passage surface is along the laminar flow passage surface. A first surface that is continuous with the laminar flow passage surface at a predetermined laminar flow forming angle that is a laminar flow in the longitudinal direction, and a lower surface of the cover that is parallel to the first surface and that is more than the first surface than the main body. A second surface located on the outer side of the second surface is formed so as to intersect with the second surface while being inclined in the longitudinal direction, and is opened along the direction orthogonal to the longitudinal direction on the laminar flow passage surface side,
A portion of the cover outside the second surface is located on the first surface side with respect to an extension of the laminar flow passage surface,
The inflow port is a gas ejection nozzle that communicates with the space from the lower surface of the main body. A transport device for transporting an object to be transported,
A gas discharge nozzle according to claim 1;
A gas supply device for supplying the high-pressure gas to the gas discharge nozzle,
Equipped with
A transport device in which the laminar flow passage surface of the gas discharge nozzle is arranged along the transport direction of the transported object. A transport device for transporting a columnar object to be transported,
At least one pair of nozzles for discharging gas according to claim 1;
A gas supply device for supplying the high-pressure gas to the gas discharge nozzle,
Equipped with
A conveying device in which the pair of gas discharging nozzles are arranged so that the laminar flow passage surfaces face each other in parallel with each other at intervals substantially equal to the diameter of the conveyed object. The transfer device according to claim 3, wherein each of the pair of gas ejection nozzles is individually provided with a pressure adjusting mechanism that adjusts the pressure of the high-pressure gas supplied from the gas supply device.

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