JPS63225027A - Conveyer - Google Patents

Abstract

PURPOSE:To promote the cost down improving workability of manufacture, by providing a supply flow path communicating with plural holes and supplying pressure fluid to these air holes so as to eliminate an afterprocess of machining an injection hole. CONSTITUTION:A conveying base bed 10 respectively constitutes injection holes 16 opened in a guide surface 14 by air holes 32 while a supply passage 17 supplying pressure fluid, introduced from the outside through an air supply hole by space 34, to the injection hole 16. Accordingly, the injection hole 16 such as in the above, being constituted of the air holes 32 formed in a pillar-shaped framework part 30 of a ceramic structure 18, can be very easily formed simultaneously with casting of the conveying base bed 10. Especially as compared with providing the injection hole such as described to be drilled by a conventional afterprocess of machining, the rapid improvement of workability of manufacture and its cost can be effectively promoted.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a conveyance device, and more particularly to a conveyance device that conveys a predetermined object to be conveyed in a floating state relative to a guide surface of a conveyance base.

(Background Art) Conventionally, when automatically conveying a predetermined article,
Conveyance devices such as roller conveyors, belt conveyors, and pistons are used, but in recent years, especially when conveying high-precision workpieces, there has been a strong demand for conveying objects in a non-contact manner with the conveyance device. It's coming.

For example, in recent years, as a continuous manufacturing method for sheet glass, molten glass melted in a glass melting kiln is guided into a molten tin bath containing molten tin, and molded under conditions where it floats on top of the molten tin. The so-called float method, in which the glass is then cooled in an annealing furnace, has been proposed, and has been widely adopted because it is extremely advantageous in terms of flatness of the formed glass and manufacturing cost compared to conventional manufacturing methods. However, in such a method, since a roller conveyor is usually used to transport the formed glass in the slow cooling furnace, fine particles may be formed on the surface of the formed glass by the contact of the conveyor with the formed glass before being cooled. Because of this, it was extremely difficult to stably obtain sufficient strength in products. In other words, even for products (plate glass) manufactured by such a float method, the tensile strength thereof is only about 1/100 of the theoretical high tensile strength, and as is clear from this, the lehr-cooling furnace Scratches caused on the surface during internal transportation have a large negative impact on product strength, and in recent years there has been a strong demand for improved strength, especially in recent years when sheet glass has been required to be thinner. be.

In order to solve this problem, it has been considered to transport the formed glass in a slow cooling furnace in a non-contact manner. That is, such a conveyance device, for example, has a plurality of fumaroles that open on the guide surface of a conveyance base in a lehr, and are inclined in the same direction at a predetermined angle with respect to the ejection surface. By blowing out pressurized gas through these blowholes, the pressurized gas exerts buoyancy and propulsive force on the glass plate placed on the guide surface, thereby causing the glass plate to move along the guide surface. A device is being considered in which the device is transported under a floating state.

However, in such a conveying device, the plurality of blowholes usually need to be drilled by machining, which makes it difficult to manufacture and undesirable from a cost standpoint. In terms of the amount of water consumed and the rigidity of the fluid film formed on the guide surface, it is desirable that the blowhole has a large throttling effect, that is, one with a small diameter.However, in reality, due to the relationship with the plate thickness etc. Top, 0.5 Seal *φ ~ 1.0
At present, it is only possible to set a diameter of about *-φ, and as a result, it is not possible to obtain a diameter that fully satisfies even basic performance such as conveyance function.

(Solution Means) Here, the present invention has been made against the background of the above-mentioned circumstances, and its feature is that the A plurality of ejection holes opening on the guide surface or the lower surface of the table are provided on the table and are inclined at a predetermined angle with respect to the ejection surface, and buoyancy and propulsion are caused by the fluid ejected through the ejection holes. A predetermined conveyed object placed directly on the guide surface of the conveyance base or on the table is conveyed in a floating state along the guide surface alone or together with the table by force. The conveying device has a plurality of columnar skeleton parts erected with linear parts of a predetermined length, and at least the skeleton itself in the columnar skeleton parts is hollow, and holes are formed in the skeleton. A porous member is used that allows fluid to pass through the pores formed in the skeleton by inserting a specified matrix material into the gaps between the skeletons of the ceramic structure to create an integral structure. ,
The porous member constitutes at least the ejection surface of the base or table, and the holes formed in the columnar skeleton are opened at a predetermined inclination angle on the ejection surface to form the ejection holes. In addition, the base or table has a structure in which a supply channel is provided inside the base or table to communicate with the plurality of holes constituting the jet holes and supply pressure fluid to the holes. .

(Effects of the Invention) Therefore, in the conveying device having the structure according to the present invention, by using a ceramic structure having a hollow columnar skeleton erected with directionality,
The ejection holes in the conveyor base or table can be formed at the same time as casting without any post-processing, thereby making it possible to obtain the desired conveyor device with good manufacturability and low cost.

In addition, in such a conveying device, the ejection hole can be formed with a small diameter, so that excellent basic performance can be advantageously exhibited, and
Since it is easy to change and set various factors such as the diameter, inclination angle, arrangement state, etc. of the ejection holes as appropriate,
Characteristics such as buoyancy and propulsive force can be appropriately selected with a large degree of freedom.

Furthermore, in such a conveying device, various materials can be selected as the matrix material, such as cast iron, copper alloy, Narminilam alloy, plastic, and even ceramics, so it can be adapted to the application and required performance. It also has the advantage that it is possible to set a wide range of performance characteristics as appropriate, and that it can be used satisfactorily over a wide range of areas.

(Example) Hereinafter, in order to clarify the present invention more specifically, an example of the present invention will be described in detail with reference to the drawings.

First, FIG. 1 shows a partial sectional view of a floating conveyor as an embodiment of a conveying device structured according to the present invention. In this figure, reference numeral 10 denotes a transport base, the upper surface of which is a flat guide surface 14 on which a predetermined object 12 to be transported is placed.

The transport base 10 has a large number of blowholes 16 that open on the guide surface 14 and are formed parallel to each other and inclined at a predetermined angle in the same direction with respect to the guide surface 14. A supply flow path 17 is provided that allows the fumarole holes 16 to communicate with each other on the proximal end side,
By ejecting pressurized gas supplied from the outside from the blowhole 16 through the supply channel 17, buoyancy and propulsive force are exerted on the conveyed object 12 placed on the guide surface 14, thereby The object 12 to be transported is transported in a predetermined direction (to the right in the figure) along the guide surface 14 in a floating state.

Here, the transport base 10 in this embodiment is constituted by a porous member 20 in which a ceramic structure 18 is integrally embedded.

More specifically, the ceramic structure 18 has a base portion 2 of a predetermined thickness, for example, as shown in FIG.
A plurality of columnar parts 24 are arranged on one surface of the base part 2.
A burnable forming base material 26 made of a burnable material such as ester-based urethane is used, and the ceramic base material 26 is formed of a burnable material such as ester-based urethane. A base skeleton 28, as shown in FIG. 3, is obtained by adhering a ceramic material such as slurry, followed by drying and firing.
A ceramic structure 18 having a structure including a plurality of linear columnar skeleton parts 30 erected in parallel with each other on one surface of the base skeleton part 28 will be used. Note that as the ceramic material forming the ceramic structure 18, cordierite, alumina, SiC, mullite, zirconia, etc. are appropriately selected depending on the characteristics required for the target product (*transfer base 10). , will be adopted.

That is, in manufacturing such a ceramic structure 18, for example, the thermal decomposition temperature of the urethane resin used as the burnable forming base material 26 is about 400°C, while the ceramic material attached to its surface Since the firing temperature of the urethane resin is usually 1,300°C or higher, the urethane resin (burnable forming base material 26) is almost completely decomposed by attaching the ceramic material to the surface and firing it for about 24 hours. It would be destroyed by fire.

Therefore, in such a ceramic structure 18, as is clear from FIG. Linear holes 32 are formed which are inclined parallel to each other in the same direction, and these holes 32 are opened into a space 34 formed in the base skeleton section 28. They are interconnected by this. Note that the pores 32 and spaces 34 in such a ceramic structure 18 are usually formed as closed spaces that are closed off from the outside space, and the pores formed in the columnar skeleton 30 are The diameter of 32 should be determined according to the characteristics required of the transport base 10, which is a product, and is not particularly limited, but is usually 0.1 mφ to 0.
．． It will be set to about 3 vaφ.

Then, a ceramic structure 1 having such a structure
8 is placed in a predetermined casting cavity forming the transfer base 10, a predetermined molten metal is introduced into the casting cavity, and the molten metal is poured into the columnar skeleton portion 30 of the ceramic structure 18. Let's put it in between and that casting cavity.

By filling the inside of the tee, a cast product having a structure in which the ceramic structure 18 is embedded integrally can be obtained.

The molten metal used is one with chemical composition that is controlled according to the physical properties required for the resulting product, and is limited to ferrous and non-ferrous metals such as cast iron, cast steel, copper alloys, and aluminum alloys. However, the material can be selected.

That is, in the cast product formed in this way, the cast metal enters the gap between the columnar skeleton parts 30 of the ceramic structure 18, and the cast metal forms a matrix for the Cerafucus structure 18. While the ceramic structure 18 has an integral structure, the pores 32 and spaces 34 formed within the skeleton 28.30
Intrusion of molten metal into the holes 32 and spaces 3
- 4 is prevented from being in a sealed state, so that the holes 32 and spaces 34 can be maintained in a hollow state and in a communicating state.

Then, cutting, polishing, etc. are performed on the guide surface 14 of the cast product, so that the tip of the columnar skeleton 30 of the ceramic structure 18 buried inside is exposed on the guide surface 14. At least, the holes 32 are opened, and although not shown, a wall portion located on the side or back side is connected to the space 34 formed in the base skeleton 28 of the ceramic structure 18. By drilling a communicating air supply hole, the intended transport base is constructed of a porous member 20 in which a ceramic structure 18 is integrally embedded, as shown in FIG. Thus, a stand 10 is obtained.

Furthermore, as is clear from this, in the conveyance base 10 of the present embodiment as described above, the blowholes 16 that open on the guide surface 14 due to the holes 32 also open through the holes 32. Spaces 34 communicating with each other at the proximal end allow pressurized gas introduced from the outside through the air supply holes to be supplied to the blowholes 16;
The supply channels 17 are configured respectively.

Therefore, in the transport base lO of this embodiment having the above-described structure, the pressure gas blowholes 16 are formed by the holes 32 formed in the columnar skeleton 30 of the ceramic structure 18. Therefore, such a fumarole hole 16 can be formed extremely easily at the same time as casting of the transfer base 10, and especially when such a fume hole is bored by conventional post-processing. In comparison, dramatic improvements in manufacturability and manufacturing costs can be effectively achieved,
As a result, a floating conveyor that can transport predetermined objects in a non-contact manner can be advantageously realized.

In addition, in such a transfer base 10, the fumarole 16
can be formed with a fine diameter and a substantially uniform distribution density over the entire surface of the guide surface 14, so an effective throttling effect can be exerted, thereby reducing the amount of pressure gas consumed and The rigidity of the fluid film formed on the guide surface 14 can be advantageously improved.

Furthermore, in the transport base 10, various metals such as cast iron, cast steel, copper alloy, or aluminum alloy can be used as the matrix material, so that the performance required depending on the application can be achieved. It also has the advantage of being able to easily respond to

Therefore, a floating conveyor formed using such a conveyance base 10, for example, as described above,
When manufacturing plate glass by the float method, by using it as a conveyance means in the cooling furnace, the plate glass can be transported smoothly in a non-contact condition, which is extremely effective in preventing scratches on the product. This makes it possible to stably produce temporary glass that has excellent strength.

In addition, in such a transfer base 10, the shape of the ceramic structure 18 used, that is, the burnable forming base material 2
According to the shape of the blowhole 6, it is easy to set the arrangement form such as the number and position of the fumarole holes 16 formed inside the blowhole 16, the diameter thereof, the inclination angle with respect to the guide surface, etc. to desired values. The amount of gas consumed, the rigidity of the fluid film formed on the guide surface 14, and the characteristics such as buoyancy, propulsive force, and braking force exerted on the transported object 12 can be set as appropriate. This also has the effect that the conveyance speed, the layout of the floating conveyor, etc. can be adjusted with a large degree of freedom in design depending on the object 12.

Although one embodiment of the conveyance device having the structure according to the present invention has been described in detail above, this is a literal illustration, and the present invention is not to be interpreted as being limited only to this specific example.

For example, in the embodiment described above, the supply channel 17 for supplying pressurized gas to the fumarole 16 is formed as a space 34 by the base skeleton 28 of the ceramic structure 18 embedded in the transfer base 10. However, there are other patent applications, for example, the patent application filed earlier by the applicant in 1982-22.
As clarified in the specification and drawings related to No. 7674, it is also possible to form the core by casting with a removable gas reservoir forming member placed in the casting cavity after casting. Yes, and furthermore, the applicant of the present application has previously filed a patent application filed in 1982.
It is also possible to provide a reinforcing piece in such a supply channel 17 according to the approach as disclosed in the specification and drawings of Japanese Patent No. 24955.

Furthermore, in the embodiment described above, the transfer base 10 is integrally formed with the porous member 20 in which the ceramic structure 18 is integrally embedded; 14) It is also possible to form only the part separately from the main body using a porous member and to fix both parts with bolts etc., and in such a case, By providing a gap between the mating surfaces of the porous member and the main body and making the gap function as a supply flow path, the porous member has a plurality of pores that open on two opposing sides. However, it is also possible to use a structure in which the holes are installed through the inside without being communicated with each other.

Furthermore, as the matrix material constituting the porous member 20, in addition to the exemplified cast metal, plastic materials, glass materials, and even ceramic materials may be used depending on the characteristics required for the intended conveyance device. It is possible to use

Furthermore, although the plurality of blowholes 16 were provided in parallel to each other in the conveyance base 10 in the above embodiment, the inclination angle of the blowholes 16 could be changed depending on the location to change the conveyance speed or to Of course, it is also possible to apply a braking force to the material to be transported 2.

Furthermore, in the embodiment described above, the transported object 12 is directly placed on the guide surface 14 of the transport base 10, and the transported object is 12 is conveyed alone, but in addition, the present invention provides a method in which a predetermined conveyed object 12 is placed on a table placed on a guide surface of a conveyance base, Together with the table, it can also be well applied to a conveyance device having a structure in which the table is conveyed while floating on a guide surface, and in particular, in a conveyance device having such a structure, By constructing such a table using the porous member 20 as described above, the blowholes 16 as described above are formed in the table, and the table itself has a structure that generates buoyancy and propulsive force against the transport base. It is also possible to do this.

Furthermore, in the above embodiment, pressurized gas was used as the jetting fluid, but in addition, depending on the usage mode,
It is possible to use a liquid or the like, and it is also possible to simultaneously heat or cool the conveyed object during conveyance by using a heating fluid or a cooling fluid as the ejected fluid. be.

In addition, the conveying device having the structure according to the present invention can be used not only for conveying devices in the manufacturing process of plate glass as described above, but also for various purposes such as conveying a workpiece after coating, and furthermore, a conveying line that also serves as heating/cooling. Of course, it is used as a conveyance device for various articles.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional explanatory view showing a conveyance base in a floating conveyor as an example of a conveyance device structured according to the present invention, and FIG. 2 is a diagram showing the formation of a ceramic structure used for such a conveyance base. FIG. 3 is an explanatory cross-sectional view showing a burnable forming base material used in the present invention, and FIG. 3 is a cross-sectional explanatory view showing a ceramic structure formed using such a burnable forming base material.

Claims (1)

[Claims] A transport base or a table placed on a guide surface of the transport base is provided with a plurality of ejection holes that open on the guide surface or the lower surface of the table and are inclined at a predetermined angle with respect to the ejection surface. , due to the buoyancy and propulsive force caused by the pressure fluid ejected through the jet hole,
A conveyance device configured to convey a predetermined object to be conveyed, which is placed directly on the guide surface of such a conveyance base or on the table, in a floating state along the guide surface alone or together with the table. A ceramic structure having a plurality of columnar skeleton parts erected with linear parts of a predetermined length, at least the skeleton itself in the columnar skeleton parts is hollow, and holes are formed in the skeleton. By using a porous member that allows fluid to pass through the pores formed in the skeleton by inserting a predetermined matrix material into the gaps between the skeletons to form an integral structure, At least the ejection surface of the base or table is made of a flexible member, and the holes formed in the columnar skeleton are opened at a predetermined angle of inclination on the ejection surface, thereby forming the ejection holes;
A conveyance device characterized in that a supply flow path is provided inside the base or table, communicating with a plurality of holes constituting the ejection holes, and supplying pressurized fluid to the holes.