JP2004194564A - Tunnel type oven - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tunnel type oven which is miniaturized and with which the structure of a conveyor is simplified and baking plates in the oven are favorably transported to bake food products. <P>SOLUTION: A chain conveyor 3 transportation is laid on a horizontal plane in a form to make a U-turn in an oven body. A great number of the baking plates 4 are connected to the conveyor chains of the chain conveyor 3 for transportation. Food products on the baking plates are baked while moving the baking plates in an approach route and a return route including the U-turn in the oven body 1 in the horizontal state of the baking plates 4. A chain conveyor 5 for an approach route guide is arranged at the side part of the approach route in the chain conveyor 3 for transportation in the oven body 1 so that the baking plates are horizontally supported and moved along the approach route. A chain conveyor 6 for a return route guide is arranged at the side part of the return route in the chain conveyor 3 for transportation so that the baking plates are horizontally supported and moved along the return route. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tunnel oven used in a baking line for baking food such as confectionery, and in particular, connects a number of baking plates to a conveyor chain and moves the inside of the oven to bake the food on the baking plates. It relates to a tunnel type oven.
[0002]
[Prior art]
In a food baking line that bake food such as pastries and bread, a tunnel oven is generally used to bake food dough placed on a baking plate while moving many baking plates in a tunnel oven using a chain conveyor. (See, for example, Patent Document 1 below).
[0003]
[Patent Document 1]
JP-A-2002-166
In this type of conventional tunnel oven, a long chain conveyor is usually laid in a straight line in a long tunnel oven, and the baking plate on which the food dough is placed is set to a low speed in the upper outward stroke of the chain conveyor. Is a structure that bake food such as confectionery and bread while moving in the oven.
[0005]
[Problems to be solved by the invention]
For this reason, tunnel type ovens that bake a large amount of food efficiently to some extent require a very long length, require a large and long installation space, and furthermore, a loading side on which food dough is placed and a fired food. There is a problem that the side where the user takes out is far away, so that the moving range of the worker becomes longer and the working efficiency deteriorates.
[0006]
In addition, for such a reason, a chain conveyor having a structure that is inverted on a horizontal plane is laid in a tunnel oven, and a large number of baking plates are reciprocated on a horizontal conveyance path in a substantially U-shaped oven, so that food is reciprocated. An oven for firing was considered. However, in order to move a large number of baking plates in a high-temperature environment in the oven and to move the U-shaped path while maintaining a horizontal state, when a guide rail with a guide roller is provided in the oven, seizure of the guide roller becomes a problem, There was a problem that the baking plate could not be moved smoothly in the oven.
[0007]
The present invention solves the above-mentioned problems, and can reduce the size of the oven, simplify the structure of the conveyor, and satisfactorily convey the baking plate in the oven and bake the food. The purpose is to provide.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a tunnel oven according to the present invention is configured such that a conveyor chain conveyor is laid in a tunnel type oven body in a U-shaped turn on a horizontal plane, and the conveyor of the conveyor chain conveyor is provided. A tunnel type oven in which a number of baking plates are connected to a chain, and the food on the baking plates is baked while moving the inside of the oven body in a forward direction and a return direction including a U-turn while the baking plates are horizontal. On the side of the forward path of the transport chain conveyor in the main body, a forward path guide chain conveyor is disposed so as to horizontally support the grilled plate and move along the forward path, and on the return path side of the transport chain conveyor. , A return path chain conveyor is disposed so as to move horizontally along the return path while supporting the baking plate horizontally, and the forward path chain conveyor and the return path Wherein the de for chain conveyor is configured to be driven by a motor for driving the conveyor chain conveyor.
[0009]
Here, the forward path guide chain conveyor and the return path chain conveyor are disposed so as to rotate each guide chain in a vertical plane on the side of the transfer chain conveyor, and each of the upper transfer paths. It can be arranged in accordance with the position of the conveyor chain of the transport chain conveyor.
[0010]
In the conveyor driving mechanism, a first bevel gear is attached to a driving shaft arranged in a vertical direction of the transport chain conveyor, and a second bevel gear is attached to a linking driving shaft arranged in a horizontal direction of the forward path chain conveyor. Attach the bevel gear, attach the third bevel gear to the linked drive shaft arranged in the horizontal direction of the return guide chain conveyor, mesh the second bevel gear and the third bevel gear with the first bevel gear It can be configured to be.
[0011]
[Action]
In the tunnel-type oven having the above configuration, the transport chain conveyor for transporting a large number of baking plates is laid in the oven main body so as to form a forward pass and a return pass including a U-turn on a horizontal plane. Since the food dough on the baking plate is heated and baked, the length of the oven main body can be reduced and the occupied space of the installation place can be reduced as compared with a through-type tunnel oven.
[0012]
In the case of baking food, a large number of baking plates on which dough is placed are heated while being transported on the outward path in the oven body by the chain conveyor for transport, and further transported on the return path by making a U-turn at the end of the conveyor. The food is baked while the food is baked, but the grilles on the outward path are supported by the chain conveyor for the outward path, and the grilles on the return path are supported by the chain conveyor for the return path. Even when connected in a cantilever state, the food can be baked while the baking plate is being conveyed in a state where the inside of the oven main body is stable and friction resistance and the like are small.
[0013]
In the drive mechanism of the conveyor, a first bevel gear is attached to a drive shaft arranged in the vertical direction of the transport chain conveyor, and a second bevel gear is attached to the link drive shaft arranged in the horizontal direction of the forward path chain conveyor. Attach a bevel gear, attach a third bevel gear to the linked drive shaft arranged in the horizontal direction of the return path chain conveyor, and mesh the second bevel gear and the third bevel gear with the first bevel gear. With such a configuration, the drive of the forward-path guide chain conveyor and the return-path guide chain conveyor can be obtained from the drive shaft of the transport chain conveyor via a bevel gear from the arrangement state. The forward and backward guide chain conveyors can be driven using the two motors.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a front view of a tunnel type oven, FIG. 2 is a plan view thereof, and FIGS. 3 and 4 are cross-sectional views of the oven main body. This tunnel-type oven has a box-shaped oven main body 1 provided with an inlet 21 and an outlet 22 for food on one side and a wall on the other side, and a baking chamber 2 is formed in the oven main body 1. In the firing chamber 2, a transport chain conveyor 3 is laid horizontally, and a number of baking plates 4 are arranged and connected to the conveyor chain 31. The baking plates 4 are connected to a vertical axis while maintaining a horizontal state. The food (confectionery, bread, and the like) on the baking plate 4 is configured to be baked on the outgoing path and the return path in the baking chamber 2 by being rotated around.
[0015]
On the side where the inlet 21 and the outlet 22 of the oven main body 1 are provided, a loading / unloading section 9 for food is formed in a stage shape. The end is exposed and laid. In addition, a depositor 10 for filling food dough onto the baking plate 4 of the transport chain conveyor 3 is disposed on the loading / unloading section 9.
[0016]
As shown in FIGS. 3 to 5, the drive shaft 33 of the transfer chain conveyor 3 is disposed vertically upright in the carry-in / carry-out section 9 that is separated from the firing chamber 2, and is rotatably supported by bearings 39a and 39b. Is done. A drive sprocket 36 is attached to the lower end of the drive shaft 33, and is linked to a motor 38 via a drive chain and a spur gear 37. The drive shaft 33 is driven to rotate by the motor 38.
[0017]
A driving sprocket 32 is mounted on the upper end of the driving shaft 33, a conveyor chain 31 is hung on the driving sprocket 32, and a bevel gear 40 is mounted below the driving sprocket 32. Below the bevel gear 40, two bevel gears 41 and 42 are arranged in mesh with each other. The two bevel gears 41 and 42 are arranged in a direction perpendicular to the drive shaft 33, that is, in a horizontal direction. Are fixed to the distal ends of the linked drive shafts 53 and 63. These two linking drive shafts 53 and 63 serve as drive shafts for the forward path guide chain conveyor 5 and the return path chain conveyor 6, and are driven by bevel gears 41 and 42 arranged at relative positions. The shafts 53 and 63 are rotationally driven in mutually opposite directions.
[0018]
Further, the transfer chain conveyor 3 has support frames 12 and 13 for supporting the roasting plate 4 from below while rotating around the drive shaft 33 and the driven shaft 35, that is, at the turn portion of the conveyor. The driving shaft 33 and the driven shaft 35 are fixed horizontally. As shown in FIG. 3, the support frames 12 and 13 are formed in an annular shape and support the roasting plate 4 during rotation while supporting the roasting plate 4 from below. You can also.
[0019]
On the other hand, as shown in FIGS. 3 and 4, in the firing chamber 2, a driven shaft 35 of the transport chain conveyor 3 is rotatably supported via a bearing 44 in a vertical state. A driven sprocket 34 is mounted. Then, the conveyor chain 31 is horizontally stretched between the driven sprocket 34 and the driving sprocket 32. A number of baking plates 4 are connected to the conveyor chain 31 so as to be conveyed horizontally to the outside thereof.
[0020]
The two linked drive shafts 53 and 63 of the forward guide chain conveyor 5 and the return guide chain conveyor 6 are horizontally opposed to each other, and are rotatably supported by bearings 56 and 56 and bearings 66 and 66, respectively. Driving sprockets 52 and 62 are attached to the outer ends of the two linked driving shafts 53 and 63, respectively. The drive sprockets 52 and 62 are respectively hung with the guide chains 51 and 61 of the forward guide chain conveyor 5 and the return guide chain conveyor 6, and the two linked drive shafts 53 and 63 rotate in mutually opposite directions. Therefore, the two guide chains 51 and 61 rotate in opposite directions to each other, and guide so as to support the ends of the roasting plate 4 in the forward path and the backward path.
[0021]
As shown in FIG. 3, the driven shafts 55 and 65 of the forward path chain conveyor 5 and the return path chain conveyor 6 are horizontally supported by bearings 57 and 67 in the firing chamber 2 of the oven body 1 and are driven. Followed sprockets 54 and 64 are attached to the ends of the shafts 55 and 65, respectively. Then, the guide chain 51 of the forward guide chain conveyor 5 is bridged between the drive sprocket 52 and the driven sprocket 54, and the guide chain 61 of the return guide chain conveyor 6 is connected between the drive sprocket 62 and the driven sprocket 64. It is hung in between.
[0022]
In the upper conveying path of the guide chain 51 of the forward path chain conveyor 5 and the guide chain 61 of the return path chain conveyor 6, a large number of grilled plates 4 conveyed by the conveying chain conveyor 3 are held in a horizontal position. Thus, it is arranged at the same height position as the conveyor chain 31 so as to guide its movement.
[0023]
In this manner, the chains 31 of the transport chain conveyor 3 are horizontally arranged so as to make a U-turn in one horizontal plane, and are arranged such that the guide chains 51 and 61 of the forward guide chain conveyor 5 and the return guide chain conveyor 6. Are arranged in a vertical posture on both sides of the transport chain conveyor 3 so that their forward and backward paths are guided by the upper transport path. In other words, the forward guide chain conveyor 5 and the return guide chain conveyor 6 are arranged so that the axes of the sprockets 52, 54, 62, 64 are arranged in the horizontal direction to form upper and lower conveying paths. Is used to guide the baking plate 4.
[0024]
In addition, since the moving directions of the transport chain conveyor 3 on the forward path and the return path are naturally reversed, the moving directions of the upper stages of the forward path chain conveyor 5 and the return path chain conveyor 6 also need to be reversed. The bevel gear 40 is attached to the drive shaft 33 of the transport chain conveyor 3 as described above, and each of the forward path guide chain conveyor 5 and the return path chain conveyor 6 is provided on both sides of the bevel gear 40 via bevel gears 41 and 42. Since the linking drive shafts 53 and 63 are linked, the rotation directions of the linking drive shafts 53 and 63 are reversed, and the forward guide chains are moved in opposite directions by the motor 38 for the transport chain conveyor 3 only. The conveyor 5 and the return-conveying guide chain conveyor 6 can be driven.
[0025]
As shown in FIG. 4, an upper heater 7 and a lower heater 8 are disposed above and below the baking plate 4 in the conveying path in the baking chamber 2 of the oven body 1, and the upper and lower heaters 7, 8 are, for example, It is configured such that heating is adjusted at the entrance, the center, and the exit of the firing chamber 2. Further, a shutter 11 is provided at an inlet 21 and an outlet 22 of the firing chamber 2 so as to be automatically opened and closed.
[0026]
When the motor 38 of the tunnel-type oven configured as described above is rotationally driven, the drive shaft 33 of the conveyor chain conveyor 3 is driven via the spur gear 37 and the chain, and the drive sprocket 32 fixed to the end thereof rotates. Then, the conveyor chain 31 is rotationally driven.
[0027]
At the same time, the rotation of the drive shaft 33 causes the linked drive shaft 53 of the forward guide chain conveyor 5 to rotate via bevel gears 40 and 41, and the drive sprocket 52 fixed to the tip of the drive shaft rotates to rotate the forward drive. The upper stage of the guide chain 51 for the guide moves in the forward traveling direction. In addition, the link drive shaft 63 of the return path chain conveyor 6 is driven to rotate via the bevel gears 40 and 42, and the drive sprocket 62 fixed to the end of the link drive shaft 63 rotates, so that the upper stage of the return path guide chain 61 is moved upward. Move in the direction of the return trip. The transport chain conveyor 3, the forward guide chain conveyor 5, and the return guide chain conveyor 6 are operated at the same transfer speed or the same intermittent cycle and speed, respectively.
[0028]
When baking foods such as confectionery and bread using the above-mentioned tunnel type oven, the food dough is filled in the depositor 10, and the food is placed on the baking plate 4 located on the loading / unloading section 9 from the depositor 10. A certain amount of food dough is extruded and placed. The chain conveyor 3 for conveyance, the chain conveyor 5 for the forward path guide, and the chain conveyor 6 for the return path guide are driven as described above. It is carried in.
[0029]
In the baking chamber 2, the baking plate 4 on which the dough is placed is supported at a very low speed or intermittently with a predetermined stop period, while being supported in a horizontal state by the chain conveyor 3 for transport and the chain conveyor 5 for outbound guide. It is conveyed at a low speed by the operation and moves toward the back of the firing chamber 2 on the outward path of the chain conveyor 3. During this time, the leading end of the baking plate 4 is supported from below by the forward path guide chain conveyor 5, and the leading end of the baking plate 4 is supported by the chain moving at the same speed as the transport speed, so that friction and the like do not occur. It is transported in a stable posture to generate abnormal noise.
[0030]
Then, the baking plate 4 conveyed to the inside of the firing chamber 2 is supported by the support frame 13 at the position of the driven shaft 35 and the driven sprocket 34 of the transfer chain conveyor 3 and makes a U-turn, and then enters the return path. The leading end of the baking plate 4 is supported from below by a return path chain conveyor 6, and the leading end of the baking plate 4 is supported by a chain moving at the same speed as the conveying speed, so that friction and the like are not generated, and abnormal noise is generated. In such a case, it is transported stably on the return path.
[0031]
The food dough on the baking plate 4 is satisfactorily baked by receiving the heat from the upper heater 7 and the lower heater 8 while moving in the U-shaped plane on the outward and return paths. Is carried out to the carry-in / carry-out section 9 from the outlet 22 of the baked food, and the baked food is taken out of the baking plate 4. In the baking chamber 2, a heater 8 serving as an upper heater 7 is divided into an inlet portion, an intermediate portion, and an outlet portion to adjust the temperature, and the shutters 11 at the outlet and the inlet are closed when the intermittent operation of the conveyor is stopped. The heating atmosphere in the chamber 2 is properly maintained, and foods such as Western confectionery are baked well.
[0032]
As described above, the tunnel-type oven having the above configuration is configured such that the transport chain conveyor 3 is arranged so as to reciprocate on a horizontal plane in the firing chamber 2 of the oven main body 1 and is fired on the outward path and the return path. Therefore, the length of the oven main body 1 can be shortened, and the area required for the installation place of the oven can be reduced.
[0033]
Further, in addition to the transport chain conveyor 3, a forward path guide chain conveyor 5 for supporting the forward grill 4 from below and a return guide chain conveyor 6 for supporting the return grill 4 from below are provided. Since the baking plate 4 conveyed by the conveying chain conveyor 3 in the firing chamber 2 is supported by the forward path chain conveyor 5 and the backward chain conveyor 6, friction resistance and abnormal noise are not generated. It can be transported stably in the state.
[0034]
For example, as another example, guide rollers may be fixedly arranged along the transport path of the transport chain conveyor to support a baking plate that is moved by these guide rollers. Baking is likely to occur in a high-temperature atmosphere, and the use of the above-described guide chain conveyor makes it possible to reduce the frictional resistance and the like and to convey the baking plate favorably. Further, the drive of the forward path guide chain conveyor 5 and the return path chain conveyor 6 can be obtained from the drive shaft 33 of the transport chain conveyor 3 via bevel gears 40, 41, 42 from the arrangement state.
[0035]
That is, the forward path chain conveyor 5 and the return path chain conveyor 6 are arranged on a plane perpendicular to the transport chain conveyor 3, so that the drive shaft 33 and the associated drive shafts 53, 63 are arranged in a right angle relationship. Is done. Therefore, if the bevel gears 40, 41, 42 are attached to the drive shaft 33 and the link drive shafts 53, 63, and the shafts are linked via the bevel gears 40, 41, 42, a chain conveyor for the forward path guide is provided. The rotation directions of the forward and backward chain conveyors 5 and 6 are opposite to each other, and are relatively simple drive mechanisms using only three bevel gears. It can be driven by the motor 38 of the transport chain conveyor 3, and the number of parts of the driving device can be reduced and the structure can be simplified.
[0036]
In the above embodiment, the electric heater is arranged in the firing chamber. However, a combustion heater for burning and heating gas or other fuel is arranged in the firing chamber, or the heating air is sent into the firing chamber. You can also.
[0037]
【The invention's effect】
As described above, according to the tunnel-type oven of the present invention, the food dough on the baking sheet is heated and baked in the outward path and the return path, so that the length of the oven body is reduced as compared with the through-hole type tunnel oven. It is possible to reduce the occupied space of the installation place, and since the grill on the outward path is supported by the chain conveyor for the outward path and the grill on the return path is supported by the chain conveyor for the backward path, Even if the baking plate is connected to the chain conveyor for conveyance in a cantilever manner, the food can be baked while the baking plate is being conveyed while the inside of the oven body is stable and the friction resistance is small.
[Brief description of the drawings]
FIG. 1 is a front view of a tunnel type oven showing one embodiment of the present invention.
FIG. 2 is a plan view of the tunnel type oven.
FIG. 3 is a plan view with a cross section of the tunnel type oven.
FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;
FIG. 5 is a VV enlarged sectional view of FIG. 3;
FIG. 6 is a sectional view taken along line VI-VI of FIG. 3;
[Explanation of symbols]
Reference Signs List 1-Oven body 2-Firing chamber 3-Chain conveyor 4-Baking plate 5-Outgoing guide chain conveyor 6-Return guide chain conveyor 31-Conveyor chain 33-Drive shaft 38-Motors 40, 41, 42-Shaft Gears 53, 63-Linking drive shaft

Claims (3)

A transport chain conveyor is laid in a tunnel type oven body in a U-shaped turn on a horizontal plane, a number of grill plates are connected to a conveyor chain of the transport chain conveyor, and the grill plate is horizontally moved. A tunnel type oven for baking food on a baking plate while moving the inside of the oven body in a forward and backward path including a U-turn in a state where
On the side of the forward path of the transport chain conveyor in the oven main body, a forward path guide chain conveyor is disposed so as to horizontally support the grilled plate and move along the forward path, On the side of the return path of the chain conveyor, a return path chain conveyor is disposed so as to horizontally support the grilled plate and move along the return path, and the forward path chain conveyor and the return path chain A tunnel oven, wherein the conveyor is driven by a motor that drives the transport chain conveyor. The forward guide chain conveyor and the return guide chain conveyor are arranged so as to rotate each guide chain in a vertical plane on a side portion of the transfer chain conveyor, and each of the transfer chains along the upper transfer path. 2. The tunnel oven according to claim 1, wherein the oven is arranged in accordance with the position of the conveyor chain of the chain conveyor. A first bevel gear is attached to a drive shaft arranged in a vertical direction of the transport chain conveyor, and a second bevel gear is attached to a linked drive shaft arranged in a horizontal direction of the forward path chain conveyor, A third bevel gear is attached to a linking drive shaft arranged in the horizontal direction of the return path chain conveyor, and the second bevel gear and the third bevel gear mesh with the first bevel gear. The tunnel type oven according to claim 2, wherein:

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