JPH06327566A - Roast preparation device - Google Patents

Abstract

PURPOSE:To enable a foodstuff on a conveyor to be roasted in a short time by providing a gas burner chamber under a wire gauze conveyor travelling through a housing, and a hot air heated chamber above the conveyor, heating a protective plate under the conveyor with combustion gas from a burner, and supplying the combustion gas to the hot air heated chamber. CONSTITUTION:An endless wire gauze conveyor 11 to travel through the openings of the side walls 3 and 4 of a housing, is actuated with a driving sprocket 12 and a driven sprocket 13. A roasting ingredient is placed on the upper surface of the conveyor 11, while a protective cover 35 of upward projected type is laid under the conveyor 11. A burner nozzle 34 is ignited in a gas burner chamber under the conveyor 11. High temperature gas is thereby generated to heat the cover 35 and introduced to a hot air heated chamber above the conveyor 11. The high temperature gas flowing through a gas riser 24 is blown from an outlet 23 to the roasting ingredient on the operation of an air supply fan 28. Also, the protective cover 36 collects a meat juice excess dropping from the ingredient into a water pan 36. According to this construction, a large quantity of ingredients can suitably be roasted in a short time and continuously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pottery production apparatus,
In particular, it relates to an apparatus for producing grilled products such as grilling by heating with a burner. Further, the present invention relates to an apparatus for producing baked products for foods such as seafood and meat having a high water content, which are baked by a relatively high heat, or foods such as dry foods having a low water content, which are baked for a relatively low heat.

[0002]

2. Description of the Related Art A ware is placed on a wire mesh and baked by natural or open flame. In particular, seafood and meat that have a relatively high water content are baked over high heat so as not to lose water and become hard. However, in this case, because it is open to the atmosphere,
Since the ambient temperature is low and it is difficult for the internal core temperature of the object to be heated to rise, it takes a long time to burn. As described above, since it takes a relatively long time to make a pottery, when there are many customers, there are problems such as serving as an order or keeping the customers waiting. However, even if the pottery is made in advance, the cooks would be hung up for a long time during the firing, which was a problem.

Even if meat and seafood are continuously baked,
When grilling meat and seafood, the gravy drips, so that the heating device cannot be placed directly below the object to be heated, and is only on the upper side, which is a problem. Therefore, by providing a heating device above and below, put meat or seafood in a container made of metal or enamel so that the gravy does not drip, and the container containing this meat or seafood is blown with hot air or far infrared rays. There has been proposed a device formed so as to continuously bake meat or seafood in a container through a space irradiated with.
An object of the present invention is to solve such a problem in the conventional grilled product manufacturing apparatus for meat or seafood.

[0004]

[Means for Solving the Problems] According to the present invention, it is possible to prepare a large amount of ware without manpower, and even if gravy drips, it is possible to produce a ware by direct fire from below. The purpose is to provide a device.

That is, according to the present invention, at least the inlet opening and the outlet opening are connected to a housing in which an inlet opening and an outlet opening are provided in a side wall portion and an openable air supply port is provided in a ceiling portion, A wire mesh conveyor having a traveling path formed therebetween is provided, a heating chamber by hot air is formed above the traveling path, and a heating chamber by a burner is formed below the traveling path. The hot-air heating chamber is provided with a hot-air blower box in which a hot-air blower opening is formed on the upper surface and a plurality of hot-air blowout openings are formed on the lower surface toward the traveling path, and the hot-air blower box has a hot-air blower box. , A conduit is formed from the lower surface to the upper surface, and the opening on the upper surface of the conduit is
Formed around the hot air outlet, the opening of the lower surface is formed with an opening area larger than the hot air outlet, the heating chamber by the burner, a plurality of burners are arranged in parallel,
Above the pipe opening of each burner, a convex protective cover is provided above, and a blower fan is provided above the hot air blower port of the hot air blower box. It is in the manufacturing equipment.

In the present invention, the housing is formed of a heat insulating material so that heat does not easily escape from the atmosphere in the housing where the atmospheric temperature is, for example, 200 ° C. or higher. The housing is formed with an inlet on the side wall for introducing the food to be baked into the housing and an outlet for discharging the food from the housing. In the present invention, an endless roller chain provided with an attachment link is provided at least at both ends from the inlet to the outlet.

In the present invention, the traveling path can be an appropriate chain conveyor by attaching a plate such as a dish-shaped or plate-shaped wire mesh to the attachment link of the endless roller chain formed in parallel. In addition, it can be detached from the attachment link, and an appropriate wire mesh container,
A dish-shaped container can also be attached. In this case, when the container is removably attached, the food to be baked can be placed on the container on the inlet side and placed in the housing, and the baked product on the outlet side can be taken out together with the container.

In the present invention, a heating chamber by a burner for firing, that is, a burner heating chamber is provided below the traveling path. When seafood, meat, etc. are baked, fats, gravy, etc. fall down. Therefore, in the present invention, a protective cover having a sectional shape protruding upward is provided above the burner in the burner heating chamber below the traveling path.

In the present invention, the protective cover is heated by the burner to a temperature of, for example, 800 ° C. or more during use, and its radiant heat serves to bake the food to be heated which is conveyed on the traveling path. The cross-sectional shape of the protective cover is provided with an inclined surface so that fat and gravy that fall on the protective cover can be easily slid down when heated to a temperature of, for example, 800 ° C. or higher by a burner. It is formed in a chevron, semicircular or semi-elliptical shape.

In the present invention, the heating burner continues to burn under a constant condition so that the radiant heat from the protective cover becomes constant, that is, the protective cover is heated to a constant heating temperature. Therefore, to adjust the heating conditions for food, the heating burner and the protective cover are moved by moving their positions so that they are moved closer to or farther from the traveling path, by changing the volume of the burner heating chamber. Done.

In this case, the heating temperature of the protective cover is kept constant at the time of heating, for example, at a constant heating temperature of, for example, 800 ° C. or more, so that the interval between the heating burner and the protective cover is kept constant. In addition, the heating burner and the protective cover are surrounded by a heat insulating wall around the heating burner and the protective cover, and a water receiver for receiving the gravy and fat is placed below the heating burner and the protective cover so that the invasion of air into the heating chamber is always constant. The insulation wall and water receiver,
It is preferable to move together with the heating burner and the protective cover.

In the present invention, in the heating chamber for firing above the traveling path, hot air is used in order to make the temperature in the heating chamber for firing uniform and to effectively use the heat of the combustion gas from the burner heating chamber. A blower box is formed. In the present invention, hot air means a hot gas flow due to the combustion gas inside the housing or a mixed hot gas flow of the combustion gas inside the housing and the hot gas outside the housing. When the amount of heat is insufficient only with the combustion gas from the burner heating chamber below the traveling path and the food to be heated is not sufficiently heated, the hot gas from the outside is mixed and used as hot air.

In the present invention, an opening / closing air supply port is provided on the ceiling of the housing. The opening / closing air supply port can adjust the heating temperature in the heating chamber by opening the air supply port. In addition, in order to bake the upper side of the food conveyed on the running path, the hot air blowing box can circulate and blow the combustion gas from the burner heating chamber toward the running path. Has a hot air outlet. Further, the hot air blowing box is provided with an ascending flow path for circulation in order to positively circulate the combustion gas from the burner heating chamber. In the present invention, the circulation upward flow path is formed by a pipe line that vertically penetrates through the hot air blowing box. Therefore, in the present invention, the combustion gas from the burner heating chamber flows from the side peripheral space of the hot air blower box and the upward flow passage for circulation to the space above the hot air blower box and is sent to the hot air blower port by the blower fan.

In the present invention, the heating chambers can be extended by connecting two or more heating chambers in parallel to increase the amount of food baked per hour. In this way, the heating chambers are connected and arranged side by side, and when the heating process is lengthened, at the place where the heating chambers are connected,
As the temperature rises, between the heating chambers connected,
The gap is formed so that heat can be dissipated. When such a gap is not formed, the ventilation channel is formed between the heating chambers so that the temperatures of the heating chambers connected to each other are independent of each other, that is, the temperatures of the heating chambers connected to each other are not continuous. .

[0015]

According to the present invention, a burner heating chamber provided with a burner and a protective cover above the burner is provided below the traveling path, and hot air blowing ports, hot air outlets and hot air circulation passages are formed above the traveling path. Since there is a blower box and a hot air heating chamber that forms an air supply port that can be opened and closed on the ceiling, the lower side of the food conveyed on the traveling path is protected from the heat of the combustion gas of the burner and red heat from the combustion gas. While being heated by the radiant heat from the cover, the upper side of the food conveyed on the traveling path is heated by the hot air from the hot air outlet of the hot air blowing box, and the food can be heated uniformly and efficiently. . Also, by opening an openable air supply port on the ceiling, an external gas is introduced into the housing, and the high temperature gas in the heating chamber is caused to flow out from the inlet and outlet of the heating chamber to reduce the temperature of the heating chamber. Can be prevented. By opening the air supply port and introducing outside air, for example, the heating temperature in the overheated heating chamber can be lowered to an appropriate temperature,
Further, by introducing hot gas from the outside, the heating temperature in the heating chamber where heating is insufficient can be raised to an appropriate temperature. Therefore, it is easy to appropriately adjust the temperature in the heating chamber.

According to the present invention, the food conveyed on the traveling path is heated by the heat and radiant heat of the combustion gas from the burner heating chamber, so that the amount of heat to be heated is large and a large amount of baked products can be produced in a relatively short time. be able to. Since the length of the heating step can be adjusted by connecting a plurality of heating chambers, the amount of food baked per hour can be increased, and the food baking conditions can be optimized depending on the type of food. In the present invention, the surface of the food is heated by, for example, radiant heat of the protective cover that is red-heated to a temperature of 800 ° C. or higher, and is also heated by the heat of the combustion gas, so that the protein on the surface of the food is solidified in a short time, so that the burns Since it can be attached, it is possible to produce a baked product with a good flavor.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited by the description and the examples. Figure 1
FIG. 2 is a schematic side sectional view for explaining one embodiment of the present invention, and FIG. 2 is a schematic front sectional view of the example of FIG. 1. FIG. 3 is a schematic partial side cross-sectional view for explaining an embodiment in which two firing units are connected in series.

The housing 2 of the calciner 1 has an inlet 5 and an outlet 6 on the front side wall 3 and the rear side wall 4, an air supply port 8 on the ceiling 7, and a door 10 on the side 9 so that the door 10 can be removed. It is inset. A roller chain 11 is provided in the housing 2 from the inlet 5 to the outlet 6. Attachments are provided at predetermined intervals on the roller chain 11, and a wire mesh container or a dish-shaped container (not shown) on which food is placed can be attached.

The roller chain 11 is stretched between a drive sprocket 12 and a driven sprocket 13 and is operated with an appropriate tension by an idler (not shown). In this example, the upper part of the roller chain 11 is formed in the burning chamber 14 by the combustion gas flow, and the lower part of the roller chain is formed in the burner burning chamber 15.

A combustion gas blower box 16 is provided in the combustion gas firing chamber 14. The combustion gas blower box 16 is slidably provided via a holder 19 on a rail portion 18 of a pillar 17 provided on the ceiling portion 7 downward from the ceiling portion 7. The holder 19 of the combustion gas blower box 16 provided in the combustion gas firing chamber 14 is mounted on the rail portion 1 from above and below.
It is formed by sandwiching 8 pieces. A power source 2 is provided at the air supply port 8.
A proportional air supply damper 21 is rotatably provided and connected to 0. These air supply dampers 21 are opened when a temperature sensor (not shown) provided in the combustion gas blower box 16 detects that the temperature in the combustion gas blower box 16 exceeds a certain temperature. , Take in the outside air, detect the temperature below a certain temperature,
Operates to stop the entry of outside air.

The bottom plate 22 of the combustion gas blower box 16 is provided with a large number of combustion gas outlets 23 and a plurality of holes through which the combustion gas rising pipes 24 are inserted. In this example, the combustion gas outlets 23 are small holes having a diameter of, for example, 5 to 10 mm, and are formed in two rows, for example, 50 rows per row, and the combustion gas rising pipes 24 are, for example, 5 rows.
It is a cylindrical tube having a diameter of 0 mm, and an appropriate number of the tubes are arranged in a circle or a square. In this example, the combustion gas blower box 1
A straightening plate 26 having a large number of small holes, for example, a large number of small holes 25 having a diameter of 4 mm, is provided inside 6 so that the flow of the combustion gas becomes uniform.

In the present embodiment, the upper surface 27 of the combustion gas blower box 16 has a combustion gas blower opening (not shown) at the center.
A combustion gas blowing fan 28 is provided above the bell mouth 29 so that the combustion gas can be forcibly blown to the combustion gas blowing port. The blower fan 28 is provided with a propeller fan motor 30 on the ceiling portion 7 of the housing 2, and is provided at an end portion of a rotating shaft 31 of the propeller fan motor 30 that passes through the ceiling portion 7.

Therefore, according to this example, the combustion gas that has risen in the side peripheral space 32 of the combustion gas blower box 17 and the combustion gas rising pipe 24 is sent by the blower fan 28 driven by the propeller fan motor 30, Guided by the bell mouth 29, it is forcibly blown into the combustion gas blower box 16 through the combustion gas blower opening formed on the upper surface of the combustion gas blower box 16, and is uniformly dispersed by the straightening plate 26. And is blown out from each combustion gas outlet 23, and the food to be heated is heated and baked.

In the burner firing chamber 15, a plurality of burner nozzles 34 are provided respectively in a plurality of fuel gas pipes 33, and a mountain-shaped protective cover 35 is provided above the burner nozzles 34 at regular intervals. There is. In this example,
A small hole (not shown) is formed in the inclined surface of the protective cover 35 so that the combustion gas can escape in the lateral direction, and a constant temperature, for example, a temperature of 800 ° C. or higher is generated by the flame of the burner nozzle 34. It is heated and functions as a predetermined radiant heat source. Therefore, even when the gravy or fat drops during the production of the broiled food, the sloped surface of the mountain-shaped protection cover 35 is red-heated, so that the gravy or fat quickly slides off the sloped surface and does not remain on the sloped surface.

Below the fuel gas pipe 33, a receiver 36 for the gravy and fat that receives the dripping gravy and fat when heated is provided. The water receiver 36 is filled with water so that the dripping gravy and fat do not burn to generate smoke. Therefore, even if the mountain-shaped protective cover 35 burns, the water receiver 36
Since it slides down into the water, it takes a relatively short time even if the broth and fat are burned, and even if smoke is generated, a large amount cannot be generated.

In the present example, the protective cover 35 is supported by the supporting members 35 'above the heat insulating walls 37 that surround the burner firing chamber 15 on all sides, and the end portion 38 of the fuel gas pipe 33 has the heat insulating wall 37. Is supported by a U-bolt 38 'on an overhang member 37' at the lower end of the overhang member 37 '.
Are supported by wires 39. This wire 39
Is fixed to the winding pulley 41 located below the water receiver 36 via a pulley 40 located at the back of the roller chain 11, for example, and by rotating the winding pulley 41,
It is possible to move the vehicle so as to approach the traveling path or to move it downwardly away from the traveling path. By moving the fuel gas pipe 33 and the protective cover 35 downward, it is possible to weaken the heating of the food that is fed along the traveling path of the roller chain 11, and, on the contrary, by moving upward,
The heating of food can be enhanced.

In the present embodiment, the burner firing chamber 15 is surrounded by the heat insulating walls 37 on the sides and is cut off by the water receiver at the lower portion. Therefore, the outside air is prevented from entering the burner firing chamber 15 by the heat insulating wall 37. It is done from between the water receivers. In addition, in this example, the hot air blocking plate 4 is surrounded by the outside of the heat insulating wall 37.
Two are provided. The hot air blocking plate 42 prevents a gap from being formed at the upper end of the heat insulating wall 37 when the burner nozzle 34 and the protective cover 35 are moved together with the heat insulating wall 37. Therefore, in this example, in the burner firing chamber 15, the volume of the burner firing chamber 15 can be increased by lowering the burner nozzle 34 to lower the temperature, and the radiant heat source can be moved away to reduce the amount of radiant heat. .

Since the apparatus of this example is constructed as described above, the food to be heated is placed in a net-shaped container (not shown) and placed on the roller chain 11 through the inlet 5 and the housing. Will be sent within 2. The food to be heated is
The upper side is heated by the combustion gas, and the lower side is burned by the radiant heat of the combustion gas and the protective cover 35 which is red-heated by the combustion gas. Although the gravy and fat drips from the mesh container, the baked food that can reduce the amount of smoke because it flows through the protective cover 35 is carried out from the outlet 6 together with the mesh container and taken out together with the container. Be done.

In the embodiment shown in FIG. 3, the calciners 1 shown in FIGS. 1 and 2 are provided with two sets of calciners connected to the inlet of one of the calciners and the outlet of the other calciner. This is an embodiment for lengthening the process and increasing the baking amount of food, and the reference numerals shown in FIGS. 1 and 2 are used for the parts corresponding to the baking device of FIGS. 1 and 2.

In this example, the outlet 6 of the first baking device 43
Faces the inlet 5 of the second baking device 44, and the food baked in the first baking device 43 is further baked in the second baking device 44. The roller chain 45 is provided in the first baking device 4 so that the first baking device 43 and the second baking device 44 can be continuously baked.
It is formed in common with No. 3 to the second baking device 44. In this example, the drive sprocket 46 is provided on the outlet 6 side of the second firing 44, and the driven sprocket 47 is provided on the inlet side of the first firing 43.

Compared with the embodiment shown in FIGS. 1 and 2, the length of the heating step can be increased, and the food feeding speed can be increased accordingly. It is possible to produce a large amount of ware. In the present example, a gap 48 is formed between the first and second calciners 43 and 44, and the heated gas in the housing 2 of the first calciner 43 is discharged from the outlet 6. It flows out together with the baked food that is carried out, and flows out through the gap 48. Further, the food baked by the first baking device 43 is carried on the roller chain 45 by the second baking device 44 and is carried in, but since outside air is partially introduced with it, the food product is overheated. Does not reach.

In this embodiment, the blower 49 is connected to a branch pipe so that the blower 49 can be shared by both the first burner 43 and the second burner 44. One is connected to the air supply pipe 51 of the first calciner 43 via the proportional air supply damper 21, and the other flow path of the branch pipe is connected to the second air calciner via the proportional air supply damper 21. It is connected to the air supply pipe 51 of 44.

Since this example is constructed as described above, the food to be heated is put in a mesh-shaped container (not shown), and the roller is fed from the inlet 5 of the first baking device 43. It is placed on the chain 45, and the housing 5 of the first baking device 44
Will be sent within 2. The food of the object to be heated is heated by the combustion gas on the upper side and is baked by the radiant heat of the protective cover 35 which is red-heated on the lower side by the combustion gas and the combustion gas. Although the gravy and fat are dripped from the net-shaped container, the amount of smoke can be made relatively small because it flows through the protective cover 35.

The food baked in the first baking device 43 is placed on the roller chain 45 from the inlet 5 of the second baking device 44 and sent into the housing 53 of the second baking device 44. The food to be heated is heated by the combustion gas on the upper side and is baked on the lower side by the radiant heat of the combustion gas and the red-heated protective cover 35, similarly to the first baking device. Although the gravy and fat are dripped from the net-like container, the amount of smoke is relatively small because it flows through the protective cover 35. The baked food is carried out from the outlet 6 of the second baking device 44 together with the net-shaped container, and taken out together with the container.

[0035]

According to the present invention, a burner heating chamber provided with a burner and a protective cover above the burner is provided below the running path, and a hot air blowing port, a hot air outlet and a hot air circulating flow path are formed above the running path. Since a hot air blower box is provided and an air supply port that can be opened and closed is provided on the ceiling, the heating power can be stronger than that of the conventional pottery production equipment, and the temperature is relatively uniform throughout the heating chamber. Therefore, a large amount of ware can be produced in a fixed time, and ware can be produced with high thermal efficiency. Compared to the conventional pottery production equipment, it is easier to make pottery in advance without requiring human labor, so there is no need to keep the waiter even when there are many customers and many orders. .

Further, according to the present invention, the food conveyed in the traveling path is heated by the heat of the combustion gas from the burner heating chamber and the radiant heat, so that the radiant heat source is set to the traveling path in which the food to be heated is conveyed. On the other hand, by bringing them closer or farther,
Since the amount of heat for heating the food can be adjusted, it is easier to control the temperature according to the type of the food, as compared with the conventional baked product manufacturing apparatus. In addition, when increasing the baking amount of food, it can be adjusted by connecting a plurality of heating chambers in series, for example, as compared to conventional baking products, depending on the type of food. It is easy to optimize the conditions for baking food, and the yield of baked products can be increased. Moreover, according to the present invention, the protein on the food surface can be solidified and browned in a short period of time, so that it is possible to produce a certain baked product with a better flavor than the conventional baked product manufacturing apparatus.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view for explaining an embodiment of the present invention.

FIG. 2 is a schematic front sectional view of the embodiment shown in FIG.

FIG. 3 is a schematic partial side cross-sectional view for explaining an example in which two firing units are connected in series.

[Explanation of symbols]

 1, 43, 44 Burning machine 2, 52, 53 Housing 3 Front side wall 4 Back side wall 5 Inlet 6 Outlet 7 Ceiling 8 Air supply port 9 Side 10 door 11, 45 Roller chain 12, 46 Drive sprocket 13, 47 Driven Sprocket 14 Firing Room 15 Burner Firing Room 16 Combustion Gas Blower Box 17 Strut 18 Rail Part 19 Holder 20 Power Source 21 Air Supply Damper 22 Bottom Plate of Combustion Gas Blower Box 23 Combustion Gas Blowout 24 Combustion Gas Rise Pipe 25 Small Hole 26 Rectification Plate 27 Combustion Gas Blower Box 16 Upper Surface 28 Blower Fan 29 Bellmouth 30 Propeller Fan Motor 31 Propeller Fan Motor Rotation Shaft 32 Side Surrounding Space 33 Fuel Gas Piping 34 Burner Nozzle 35 Protective Cover 35 'Above the Insulation Wall 37 Support member 36 Water receiver 37 Insulation wall 37 'Insulation wall 37 End 38 of the lower end of the overhang member 38 fuel gas pipe 33 'U bolts 39 wire 40 pulley 41 the hoisting pulley 48 gap 49 blower 50 blowing port 51 the air supply pipe

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 22, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3] ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 24, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

In the embodiment shown in FIGS. 1 and 2,
The housing 2 of the broiler 1 is provided with an inlet 5 and an outlet 6 on the front side wall portion 3 and the rear side wall portion 4, an air supply port 8 on the ceiling portion 7, and a door 10 is detachably fitted on the side surface 9. There is. A roller chain 11 is provided in the housing 2 from the inlet 5 to the outlet 6. Roller chain 1
1 is provided with attachments at predetermined intervals, and a wire mesh container or a dish-shaped container (not shown) on which food is placed can be attached.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

In the burner firing chamber 15, a plurality of fuel gas pipes 33 and a plurality of burner nozzles 34 (see FIG. 2) are provided.
And the burner nozzles in the middle except the burner nozzles at both ends.
(Not shown in the figure) is provided , and the chevron-shaped protective cover 3 is provided above the row of the burner nozzles 34.
5 are provided. In this example, the protective cover 35 has a small hole (not shown) formed in the inclined surface so that the combustion gas may escape in the lateral direction, and the flame of the burner nozzle 34 causes a constant temperature, for example, 800 ° C. It is heated to the above temperature and functions as a predetermined radiant heat source. Therefore, even when the gravy or fat drops during the production of the broiled food, the sloped surface of the mountain-shaped protection cover 35 is red-heated, so that the gravy or fat quickly slides off the sloped surface and does not remain on the sloped surface.

Claims (1)

[Claims] 1. An inlet opening and an outlet opening are provided in a side wall portion, and at least the inlet opening and the outlet opening are connected to a housing provided with an openable / closable air supply opening in a ceiling portion,
A wire mesh conveyor having a traveling path formed therebetween is provided, a heating chamber by hot air is formed above the traveling path, and a heating chamber by a burner is formed below the traveling path. The hot-air heating chamber is provided with a hot-air blower box in which a hot-air blower opening is formed on the upper surface and a plurality of hot-air blowout openings are formed on the lower surface toward the traveling path, and the hot-air blower box has a hot-air blower box. A pipe line is formed from the lower face to the upper face, the opening on the upper face of the pipe line is formed around the hot air blowing port, and the lower face opening is formed with an opening area larger than the hot air blowing port. A plurality of burners are arranged in parallel in the heating chamber by the burners, and a convex protective cover is provided above the pipe opening of each burner, and the hot air blower of the hot air blower box is provided. A blower fan is installed above the mouth Pottery manufacturing apparatus characterized by there.