JPH02115070A - Coating dryer - Google Patents

Abstract

PURPOSE:To reduce motive power by arranging the gas blow-off ports in the low positions in accordance with the lower part side of the carrier direction of a thin plate and constituting the carrier route of the thin plate of a inclined route. CONSTITUTION:The slitlike blow-off ports 2 chevron-shaped in top view are arranged side by side at the prescribed intervals to the carrier direction F in a range over the whole width of a carrier route 1 in the bottom part thereof. Hot air is blown on the underside of a metallic thin plate A through the slitlike blow-off ports 2 and thereby the metallic thin plate A in a carrier stage is held in a levitating state. The slitlike suction ports are adjacently provided to both sides of the respective blow-off ports 2. Thereby the levitating state of the metallic thin plate A is stabilized by exhausting the hot air in a furnace downward from the under part of the metallic thin plate A being in the levitating state. The slitlike upper blow-off ports 4 are arranged side by side at the prescribed intervals in the carrier direction F to the ceiling part of the carrier route 1. Thereby the metallic thin plate A being in the levitating state in the carrier route 1 can be surely prevented from being lowered by gravity and being transferred to the middle direction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coating drying device that transports thin plates used for various purposes in a floating state after coating and performs coating drying. The present invention relates to a paint drying apparatus in which air outlets for keeping a thin plate to be painted and dried in a floating state by blowing gas onto the lower surface of the thin plate are arranged in parallel in the conveying direction of the thin plate.

[Conventional technology]

Conventionally, in the above-mentioned paint drying apparatus, as shown in FIG. 9 (or FIG. 10), the direction in which gas is blown from the outlet (2) to the lower surface of the thin plate (A) is set to the conveying direction (F).
As it is oriented diagonally toward the lower side (or upper side),
A biasing force is applied to the thin plate (A) in a floating state toward the lower side (or toward the upper side) in the conveyance direction, and the thin plate (A)
A retainer (5) is provided that is driven and moved at a predetermined speed toward the downstream side in the conveying direction while abutting the leading edge (or trailing edge) of the thin plate (A) and receiving the biasing force. ) and the catch (5) are reliably kept in contact with each other by the applied biasing force, and this contact prevents the thin plate (A) in a floating state from moving in the width direction of the conveyance path. There is a type that conveys a thin plate (A) in a predetermined conveyance direction (F) (see Japanese Patent Publication No. 60-42139).

[Problem to be solved by the invention]

However, in order to apply a sufficient biasing force toward the lower side or the upper side of the floating thin plate by blowing gas obliquely onto the thin plate in a floating state, the speed and amount of gas ejected from the outlet must be considerably increased. In this respect, there was a problem in that the power required for spraying the gas was large.

Furthermore, it is difficult to simultaneously apply a sufficient urging force and maintain a stable floating state of the thin plate, resulting in the problem that the floating state becomes unstable.

The purpose of the present invention is to achieve rational improvements using gravity.
The object of this invention is to effectively prevent the thin plate from moving in the width direction of the conveyance path without causing the above-mentioned problems.

[Means to solve the problem]

The characteristic configuration of the paint drying apparatus according to the present invention is that (a) air outlets are arranged in parallel in the conveying direction of the thin plate to keep the thin plate to be coated and dried during the conveyance process in a floating state by blowing gas against the lower surface of the thin plate; The air outlet is disposed at a lower position toward the lower side in the conveying direction of the thin plate, and the air outlet arrangement allows the thin plate in a floating state to travel along the conveying path of the thin plate due to the fall of its own weight and to move toward the lower side in the conveying direction. or (b) the air outlet is arranged at a lower position on either the upper side or the lower side in the conveyance direction of the thin plate, and the conveyance path of the thin plate is formed by the air outlet arrangement. The thin plate in a floating state has an inclined path in which a component force of its own weight falls in the direction along the conveyance path, and when the thin plate contacts the edge of the thin plate and receives the downward force of its own weight, the thin plate is moved downward in the direction of conveyance. (c) The gas blowing force is smaller as the blower outlet is located on the lower side in the conveyance direction of the thin plate, and the blower outlet arrangement increases the speed of the thin plate. The conveying path is a photon-like inclined path in which the thin plate in a floating state is conveyed and moved toward the lower side in the conveying direction due to the fall of its own weight; It is assumed that the gas blowing force is smaller as the gas blowing force is lower toward the lower side, and the air blowing outlet arrangement allows the thin plate to travel along the conveyance path of the thin plate, and the thin plate in a floating state to reduce the falling force of its own weight in the direction along the conveyance path. This is achieved by providing a conveying speed regulator that moves toward the lower side in the conveying direction of the thin plate while abutting against the edge of the thin plate and receiving the falling force of its own weight. is as follows.

[For production]

In other words, in the configuration of item (A) or item (A) above, the thin plate in a floating state is transported to the downstream side in the transport direction due to its own weight falling, but the dead weight falling blade facing the downstream side in the transport direction is constantly moved by gravity. , and is stably applied to the thin plate in the floating state, so that the thin plate in the floating state is reliably transported toward the downstream side in the transport direction while being effectively prevented from moving toward the middle of the transport path.

In addition, in the configuration described in item (b) or (d) above, the falling component of dead weight (attached Since the force (force) is always and stably applied to the thin plate in a floating state by gravity, the state of contact between the conveyance speed governor and the edge of the thin plate is reliably maintained, and this contact allows the conveyance path to move in the width direction. The thin plate in a floating state is transported downward in the transport direction with the movement of the transport regulator.

〔Effect of the invention〕

In other words, in any of the configurations (a) to (d) above, the thin plate in a floating state is urged by gravity in the direction along the conveyance path (in the conveyance direction or in the opposite direction) to convey the thin plate. Since movement in the path width direction is prevented, the blowing of gas from the outlet to the lower surface of the thin plate only has to have the effect of keeping the thin plate in a floating state, and as a result, the diagonal blowing of gas creates a biasing force on the thin plate. Compared to the conventional method, which both gives the thin plate a floating state and maintains the thin plate in a floating state, the speed and amount of gas jetted from the outlet can be reduced, and the power required for blowing the gas can be greatly reduced. The width can be reduced, and the floating state of the thin plate can be stabilized.

〔Example〕

Next, an example will be described.

Figures 1 and 2 show the schematic configuration of a paint drying oven, (1
) is a tunnel-shaped in-furnace conveyance path that continuously conveys painted metal sheets (A) at predetermined intervals in the longitudinal direction of the furnace, and at the bottom of the conveyance path (1), there are
And a slit-shaped air outlet (2) shaped like a "<" in plan view.
are arranged in parallel at a predetermined interval in the conveying direction (F).

These slit-shaped outlets (2) are for blowing hot air onto the lower surface of the thin metal plate (A) to keep the thin metal plate (A) in a floating state during the conveyance process. There is a slit-shaped suction port in the same ``<'' shape that stabilizes the floating state of the thin metal plate (A) by suctioning and exhausting the hot air inside the furnace from below the thin metal plate (A) in the floating state. (3) are arranged adjacent to each other.

In addition, a slit-shaped upper air outlet (4) is installed in the ceiling of the conveyance path (1) to blow hot air onto the upper surface of the floating metal sheet (A) and press it against the metal sheet (A). They are arranged in parallel at predetermined intervals in the transport direction (F).

The thin metal plate (A) is coated and dried during the transportation process by blowing hot air from the upper and lower air outlets (2) and (4).

The lower air outlet (2) and the adjacent suction port (
3) and the upper air outlet (4) are respectively arranged at a lower position toward the lower side in the conveyance direction (F), so that the thin metal plate (A) in a floating state can move along the conveyance path (1) under its own weight. It is a sloping path with a downwardly downward slope that moves downward in the conveyance direction.

The inclination gradient of the conveyance path (1) is about 1/100 to 1/200.

(5) is a predetermined speed toward the downstream side in the conveying direction when the thin metal plate (A) is in contact with the tip edge of the thin metal plate (A) in a floating state and receives the falling force of the thin metal plate (A)'s own weight toward the downstream side in the conveying direction. (6) is a conveyor speed governor that moves with each thin metal plate (A).
This is a conveyor device that drives and moves a conveyance speed governor (5) toward the downstream side in the conveyance direction at a predetermined speed.

In other words, the above-mentioned conveyance speed governor (5) regulates the speed of the conveyance movement due to the fall of the floating metal sheet (A) by its own weight, and prevents the front and rear metal sheets (A) from colliding with each other, In addition, the conveying speed governor (5) receives the falling force of the thin metal plate (A) due to its own weight toward the lower side in the conveying direction, and the thin metal plate (A)
By using gravity to ensure that the tip edge of A) is in contact with the conveying speed regulator (5), the contact between the thin metal plate (
This is to reliably prevent movement of A) in the width direction in the transport direction.

[Another example]

Next, another example will be listed.

(a) As shown in Figure 3, the air outlet (2) is connected to a thin plate (A
), the upper side of the transport direction (F) of A conveyance speed regulator that has an inclined path that generates a downward force due to its own weight, and moves toward the lower side in the conveyance direction while coming into contact with the rear edge of the thin plate (A) and receiving the downward force due to its own weight. (5) may be provided, and the thin plate (A) in a floating state may be conveyed to the downstream side in the conveyance direction while being pushed by the conveyance speed governor (5).

(b) As shown in FIG. The gas blowing direction from (2) may be vertically upward.

(C) As shown in Figure 5, connect the air outlet (2) with a thin plate (
It is assumed that the gas blowing force is smaller as the sheet A) is located on the lower side in the conveyance direction (F), so that the thin plate (A) in a floating state moves along the conveyance path (1) of the thin plate (A) due to its own weight falling. It is also possible to use an inclined path with the tip downwardly moving toward the downstream side in the conveyance direction.

(d) As shown in Figure 6, the air outlet (2) is connected to a thin plate (A
), the gas blowing force is assumed to be smaller as the sheet is located on the upper side in the conveying direction (F).
) in the direction along which the downward force of the dead weight of the thin plate (A) is generated, and the conveying direction is made such that the downward force of the dead weight of the thin plate (A) is received by contacting the rear edge of the thin plate (A). A conveyance speed governor (5) that moves toward the downstream side may be provided, and the thin plate (A) in a floating state may be conveyed toward the downstream side in the conveyance direction while being pushed by the conveyance speed governor (5).

(e) As shown in Fig. 1 or 5, in the case where the thin plate (A) is transported and moved downward in the transport direction by falling under its own weight, when the transport speed governor (5) is driven and moved to the downstream side in the transport direction. Instead, the thin plate (A) is moved downward in the conveying direction by the force of the falling weight of the thin plate (A) while providing a predetermined resistance to the conveying movement due to the falling weight of the thin plate (A). (A) The conveyance movement due to the drop of dead weight may be controlled by braking.

(f) Also, in a device in which the thin plate (A) is conveyed and moved downward in the conveying direction by falling under its own weight, instead of providing a conveying speed governor (5) that makes contact with the thin 1ff (A), a floating metal A braking means may be provided to brake and speed-regulate the conveyance movement due to the weight drop of the thin plate (A) by electromagnetic action on the thin plate (A). , those that act in contact with the thin plate (A), and those that act in a non-contact manner on the thin plate (A), and various types can be applied.

(g) The slope of the sloped conveyance path may be determined as appropriate;
Further, the inclination gradient may be changed during the conveyance route.

(h) The movement structure of the conveyance speed governor (5) can be improved in various ways, and the abutment structure of the conveyance speed governor (5) against the thin plate (A) can also be modified, for example, depending on the conveyance path of the thin plate (A). In order to more reliably prevent movement in the width direction, the conveyance speed regulator 5) is made of a thin plate (
Various improvements are possible, such as forming it into an L-shape extending from the front and rear edges to the side edges of A).

(i) The shape and structure of the air outlet (2) can be improved in various ways, for example, it may be formed into a curved or circular shape, and the arrangement form of the air outlet (2) in plan view can also be changed. For example, the 7th TI
! Various configuration changes are possible, such as arranging it as shown in J or FIG.

(j) Various gases can be used as the gas blown from the outlet (2), and the coating drying process itself of the thin plate (A) may be performed by radiant heating.

(k) The material of the thin plate (A) is not limited to metal, and may be, for example, a plastic sheet, a craft sheet, etc., and the application of the painted thin plate is not limited.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a plan view. 3 to 6 are longitudinal sectional views showing other embodiments of the invention, and FIGS. 7 and 8 are plan views showing other embodiments of the invention. FIGS. 9 and 10 are longitudinal cross-sectional views showing conventional examples, respectively. (1)... Conveyance path, (2)... Air outlet, (A)... Thin plate, (F)... Conveyance direction.

Claims (1)

[Claims] 1. An air outlet (2) that keeps the thin plate (A) to be coated and dried during the conveyance process in a floating state by blowing gas against its lower surface.
) are arranged in parallel in the conveying direction (F) of the thin plate (A), the blower outlet (2) is arranged lower toward the lower side in the conveying direction of the thin plate (A), and the blower outlet The coating drying apparatus is arranged so that the conveyance path (1) of the thin plate (A) is a downwardly inclined path along which the thin plate (A) in a floating state is conveyed and moved downward in the conveying direction due to the fall of its own weight. 2. The air outlet (2
) are arranged in parallel in the conveyance direction of the thin plate (A), wherein the blower outlet (2) is positioned lower toward either the upper side or the lower side in the conveyance direction of the thin plate (A). The thin plate (A) in a floating state is placed on the conveyance path (1) of the thin plate (A) by the arrangement of the air outlet.
1) An inclined path that produces a downward force due to its own weight in the direction along
A paint drying device provided with a conveying speed governor (5) that moves toward the lower side in the conveying direction of the thin plate (A) while abutting the edge of the thin plate (A) and receiving the falling force of its own weight. . 3. The air outlet (2
) are arranged in parallel in the conveying direction (F) of the thin plate (A), and the gas blowing force is higher in the case where the blower outlet (2) is located on the lower side in the conveying direction of the thin plate (A). The conveyance path (1) of the thin plate (A) is a downwardly inclined path in which the thin plate (A) in a floating state is conveyed downward in the conveyance direction due to the drop of its own weight due to its outlet arrangement. Paint drying equipment. 4. The air outlet (2
) are arranged in parallel in the conveying direction (F) of the thin plate (A), the air outlet (2) being connected to the thin plate (A).
The gas blowing force is assumed to be smaller as the gas blowing force is lower toward the upper or lower side of the conveyance direction, and the conveyance path (1) of the thin plate (A) is controlled by the air outlet arrangement. The thin plate (A) has an inclined path in which a component force of its own weight falls in the direction along the conveyance path (1), and the thin plate (A) Conveyance speed governor (
5) Paint drying equipment. 5. Claim 1 or 3, further comprising a braking means for adjusting the speed of conveyance of the thin plate (A) by contact resistance with respect to the thin plate (A) in a floating state during conveyance movement due to drop of dead weight of the thin plate (A). Paint drying equipment as described. 6. A non-contact braking means is provided for adjusting the speed of conveyance of the thin plate (A) in a non-contact state with the thin plate (A) in a floating state when the thin plate (A) is conveyed by falling under its own weight. The coating drying apparatus according to claim 1 or 3. 7. The non-contact braking means is the thin plate (A) made of metal.
7. The coating drying apparatus according to claim 6, wherein the conveyance movement of the thin plate (A) is braked by electromagnetic action against the thin plate (A).