JP4113768B2 - Tunnel oven - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tunnel oven used in a baking line for baking foods such as confectionery, and in particular, a number of baking plates are connected to a conveyor chain, and the food on the baking plates is baked while moving in the oven. It relates to a tunnel oven.
[0002]
[Prior art]
In a food baking line that burns foods such as pastry and bread, a tunnel oven is generally used to bake food dough placed on a baking plate while moving many baking plates in the tunnel oven using a chain conveyor. Is used (see, for example, Patent Document 1 below).
[0003]
[Patent Document 1]
JP 2002-166 Gazette
Conventional tunnel ovens of this type are usually constructed by laying a long chain conveyor in a straight line in a long tunnel oven, and then lowering the baking plate on which food dough is placed in the upper stage of the chain conveyor. In this structure, foods such as confectionery and bread are baked while moving in the oven.
[0005]
[Problems to be solved by the invention]
For this reason, in a tunnel oven that bakes a large amount of food to some extent efficiently, its length becomes very long, requiring a wide and long installation place, and furthermore, the carry-in side on which the food dough is placed and the baked food As a result, there is a problem that the side of taking out the machine becomes far away, and the movement range of the worker becomes long and work efficiency deteriorates.
[0006]
For this reason, a chain conveyor having a structure that is inverted on a horizontal plane is laid in the tunnel oven, and a large number of baking plates are reciprocated along a horizontal conveyance path in a substantially U-shaped oven, thereby allowing food to be removed. A baking oven was considered. However, when a guide rail with a guide roller is provided in the oven in order to move the U-shaped path while maintaining a horizontal state in a high temperature environment in the oven, the image sticking 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-described problems, and can reduce the size of the oven, simplify the structure of the conveyor, and can well 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 includes a conveyor chain conveyor laid in a tunnel-shaped oven body in a U-shaped turn on a horizontal plane. A tunnel oven in which a large number of baking plates are connected to a chain, and the food on the baking plates is baked while being moved horizontally in the forward and backward paths including the U-turn while the baking plates are leveled. On the side of the outbound path of the conveyor chain conveyor in the main body, the outbound path guide chain conveyor is disposed so as to move horizontally along the outbound path while supporting the baking plate horizontally, and on the side of the return path of the transport chain conveyor. The return path guide chain conveyor is disposed so as to move horizontally along the return path while supporting the baking plate horizontally. Wherein the de for chain conveyor is configured to be driven by a motor for driving the conveyor chain conveyor.
[0009]
Here, the forward guide chain conveyor and the backward guide chain conveyor are arranged so as to rotate each guide chain within the vertical plane of the side of the transport chain conveyor, and each upper transport path It can arrange | position according to the position of the conveyor chain of a conveyance chain conveyor.
[0010]
In the conveyor drive mechanism, a first bevel gear is attached to a drive shaft arranged in the vertical direction of the transfer chain conveyor, and a second link gear is attached to the linkage drive shaft arranged in the horizontal direction of the forward guide chain conveyor. A bevel gear is attached, a third bevel gear is attached to the linkage drive shaft disposed in the horizontal direction of the chain conveyor for the return path guide, and the second bevel gear and the third bevel gear are engaged with the first bevel gear. It can be configured to be.
[0011]
[Action]
In the tunnel oven having the above-described configuration, the conveyor chain conveyor for transporting a large number of baking plates is laid in the oven body so as to form a forward path and a return path including a U-turn on one horizontal plane. Since the food dough on the baking plate is heated and baked, the length of the oven main body can be shortened and the space occupied by the installation place can be reduced as compared with the penetration type tunnel oven.
[0012]
When baking food, a large number of baking plates on which the dough is placed are heated while being transported in the forward path in the oven body by the transport chain conveyor, and further, the end of the conveyor is U-turned and transported in the return path. Although the food is baked while being heated, the forward grilling plate is supported by the forward guide chain conveyor, and the backward grilling plate is supported by the backward guide chain conveyor. Even when connected in a single piece state, food can be baked while conveying the baking plate in a state where the inside of the oven body is stable and the frictional resistance is low.
[0013]
In the conveyor drive mechanism, a first bevel gear is attached to the drive shaft arranged in the vertical direction of the transfer chain conveyor, and the second drive shaft is connected to the linkage drive shaft arranged in the horizontal direction of the forward guide chain conveyor. A bevel gear is attached, a third bevel gear is attached to the linkage drive shaft arranged in the horizontal direction of the chain conveyor for the return path guide, and the second bevel gear and the third bevel gear are engaged with the first bevel gear. With this configuration, the forward guide chain conveyor and the return guide chain conveyor can be driven from the arrangement state via the bevel gear from the drive shaft of the transport chain conveyor. The forward motor and the backward guide chain conveyor can be driven by using the motor of the base.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a tunnel oven, FIG. 2 is a plan view thereof, and FIGS. 3 and 4 are sectional views of the oven body. This tunnel type oven has a box-shaped oven body 1 provided with a food inlet 21 and outlet 22 on one side and covered with a wall on the other side, and a baking chamber 2 is formed in the oven body 1. In the baking chamber 2, a conveyor chain conveyor 3 is laid horizontally, and a large number of baking plates 4 are connected to the conveyor chain 31 side by side. It is configured to rotate around and to bake food (confectionery, bread, etc.) on the baking plate 4 in the forward and backward paths in the baking chamber 2.
[0015]
On the side of the oven body 1 where the inlet 21 and the outlet 22 are provided, a food carry-in / carry-out unit 9 is formed in a stage shape, and the carry-in / carry-out unit 9 includes a conveyor chain conveyor 3 extending from the oven body 1. The end is exposed and laid. Further, a depositor 10 for filling the dough on the baking plate 4 of the transfer 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 vertically arranged on the loading / unloading section 9 removed from the baking 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, and the drive shaft 33 is rotationally driven by the motor 38.
[0017]
A drive sprocket 32 is attached to the upper end of the drive shaft 33, a conveyor chain 31 is hung on the drive sprocket 32, and a bevel gear 40 is attached to the lower part of the drive sprocket 32. Two bevel gears 41, 42 are arranged in mesh with the lower side of the bevel gear 40, and the two bevel gears 41, 42 are arranged in a direction perpendicular to the drive shaft 33, that is, horizontally. Are fixed to the tips of the linkage drive shafts 53 and 63. These two linkage drive shafts 53 and 63 serve as drive shafts for the forward guide chain conveyor 5 and the backward guide chain conveyor 6, and are linked drive driven by bevel gears 41 and 42 disposed at relative positions. The shafts 53 and 63 are rotationally driven in directions opposite to each other.
[0018]
Further, the transport chain conveyor 3 includes support frames 12 and 13 for supporting the baking 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 drive 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 have a structure that supports the rotating baking plate 4 from below while rotating together. However, the support frames 12 and 13 are formed radially as a radial frame. You can also.
[0019]
On the other hand, as shown in FIGS. 3 and 4, in the baking chamber 2, the driven shaft 35 of the transfer chain conveyor 3 is rotatably supported via a bearing 44 in a vertical state. A driven sprocket 34 is attached. A conveyor chain 31 is horizontally stretched between the driven sprocket 34 and the drive sprocket 32. A large number of baking plates 4 are connected to the conveyor chain 31 so as to be conveyed in a horizontal state to the outside.
[0020]
The two linkage drive shafts 53 and 63 of the forward path guide chain conveyor 5 and the backward path guide chain conveyor 6 are disposed horizontally facing each other and rotatably supported by bearings 56 and 56 and bearings 66 and 66, respectively. Drive sprockets 52 and 62 are attached to the outer ends of the two linkage drive shafts 53 and 63, respectively. The drive sprockets 52 and 62 are respectively engaged with the guide chains 51 and 61 of the forward guide chain conveyor 5 and the backward guide chain conveyor 6, and the two linkage drive shafts 53 and 63 rotate in opposite directions. Therefore, both guide chains 51 and 61 rotate in opposite directions to guide so as to support the end portions of the forward and backward baking plates 4.
[0021]
The driven shafts 55 and 65 of the forward guide chain conveyor 5 and the backward guide chain conveyor 6 are pivotally supported by bearings 57 and 67 horizontally in the baking chamber 2 of the oven body 1 as shown in FIG. The driven sprockets 54 and 64 are attached to the tips of the shafts 55 and 65, respectively. The guide chain 51 of the forward path guide chain conveyor 5 is stretched between the drive sprocket 52 and the driven sprocket 54, and the guide chain 61 of the backward path guide chain conveyor 6 is connected between the drive sprocket 62 and the driven sprocket 64. It is passed in between.
[0022]
The upper conveyance path of the guide chain 51 of the forward path guide chain conveyor 5 and the guide chain 61 of the backward path chain conveyor 6 holds a large number of baking plates 4 conveyed by the conveyance chain conveyor 3 in the horizontal position. Therefore, it is arranged at the same height position as the conveyor chain 31 so as to guide the movement.
[0023]
In this way, the chain 31 of the transfer chain conveyor 3 is horizontally arranged so as to rotate in a U-turn within one horizontal plane, and the guide chains 51 and 61 of the forward guide chain conveyor 5 and the backward guide chain conveyor 6 are arranged. Are arranged in a vertical posture on both sides of the conveyor chain conveyor 3 so that the forward path and the return path are guided by the upper conveyance path. That is, the forward guide chain conveyor 5 and the backward guide chain conveyor 6 are arranged so that the axes of their sprockets 52, 54, 62, 64 are arranged in the horizontal direction to form upper and lower conveying paths. The transport path is used as a guide for the baking plate 4.
[0024]
Further, since the movement direction is naturally reversed in the forward path and the backward path of the transport chain conveyor 3, it is also necessary to reverse the movement direction of the upper stages of the forward guide chain conveyor 5 and the backward guide chain conveyor 6. The bevel gear 40 is attached to the drive shaft 33 of the conveyor chain conveyor 3 as shown in FIG. 6 and the forward guide chain conveyor 5 and the backward guide chain conveyor 6 are connected to both sides of the bevel gear 40 via bevel gears 41 and 42. Since the linkage drive shafts 53 and 63 are linked, the rotation directions of the linkage drive shafts 53 and 63 are reversed, and the forward guide chain moves in the opposite direction only by the motor 38 for the transport chain conveyor 3. The conveyor 5 and the return path guide chain conveyor 6 can be driven.
[0025]
As shown in FIG. 4, an upper heater 7 and a lower heater 8 are arranged above and below the baking plate 4 in the conveyance path in the baking chamber 2 of the oven body 1, and the upper and lower heaters 7 and 8 are, for example, It is comprised so that heating adjustment may be carried out in the entrance part, the center part, and the exit part of the baking chamber 2, respectively. Further, the shutter 11 is disposed at the inlet 21 and the outlet 22 of the baking chamber 2 so as to be automatically opened and closed.
[0026]
When the motor 38 of the tunnel oven configured as described above is rotationally driven, the drive shaft 33 of the transport chain conveyor 3 is driven through the spur gear 37 and the chain, and the drive sprocket 32 fixed to the tip of the shaft is rotated. Then, the conveyor chain 31 is driven to rotate.
[0027]
At the same time, the rotation of the drive shaft 33 drives the linkage drive shaft 53 of the forward guide chain conveyor 5 via the bevel gears 40 and 41, and the drive sprocket 52 fixed to the tip of the linkage drive shaft 53 rotates. The upper stage of the guide chain 51 for guide moves toward the traveling direction of the forward path. Further, the linkage drive shaft 63 of the return path guide chain conveyor 6 is rotationally driven via the bevel gears 40 and 42, and the drive sprocket 62 fixed to the tip of the link drive shaft 63 is rotated. Move in the direction of the return journey. The transport chain conveyor 3, the forward guide chain conveyor 5 and the backward guide chain conveyor 6 are each operated at the same transport speed or at the same intermittent cycle and speed.
[0028]
When baking the food such as confectionery and bread using the tunnel oven, the depositor 10 is filled with food dough and placed on the baking plate 4 located on the carry-in / out section 9 from the depositor 10. A fixed amount of food dough is extruded and placed. The transport chain conveyor 3, the forward guide chain conveyor 5, and the backward guide chain conveyor 6 are driven as described above, so that the baking plate 4 on which the dough is placed enters the baking chamber 2 of the oven body 1 from the inlet 21. It is carried in.
[0029]
In the baking chamber 2, the baking plate 4 on which the dough is placed is intermittently held at a very low speed or with a predetermined stop period while being supported in a horizontal state by the transfer chain conveyor 3 and the forward guide chain conveyor 5. It is transported at a low speed by the operation, and moves along the forward path of the chain conveyor 3 toward the back of the baking chamber 2. During this time, the tip of the baking plate 4 is supported from below by the forward guide chain conveyor 5, and the tip of the baking plate 4 is supported by the chain that moves at the same speed as the conveyance speed, so that friction or the like does not occur. It is transported in a stable posture to generate abnormal noise.
[0030]
Then, the baking plate 4 conveyed to the back in the baking chamber 2 is supported by the support frame 13 at the position of the driven shaft 35 and the driven sprocket 34 of the conveying chain conveyor 3 and then makes a U-turn, and then enters the return path. The front end of the baking plate 4 is supported from below by a return path guide chain conveyor 6, and the front end of the baking plate 4 is supported by a chain that moves at the same speed as the conveying speed. For example, the return path is stably conveyed.
[0031]
The food dough on the baking plate 4 is satisfactorily baked by receiving heat from the upper heater 7 and the lower heater 8 while moving in the U-shaped plane on the forward path and the return path. From the outlet 22, the food is carried out to the carry-in / carry-out unit 9 where the baked food is taken out from the baking plate 4. In the baking chamber 2, the heater 8 serving as the upper heater 7 is divided into an inlet portion, an intermediate portion, and an outlet portion, and the temperature is adjusted. The outlet and inlet shutters 11 are closed when the intermittent operation of the conveyor is stopped, and the baking is performed. 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 oven having the above-described configuration is configured such that the transfer chain conveyor 3 is reciprocated on one horizontal plane in the firing chamber 2 of the oven body 1 and fired in the forward path and the return path. Therefore, the length of the oven body 1 can be shortened, and the area required for the installation location of the oven can be reduced.
[0033]
In addition to the transfer chain conveyor 3, an outward guide chain conveyor 5 that supports the forward grilling plate 4 from below is disposed, and a backward guide chain conveyor 6 that supports the backward grilling plate 4 from below is disposed. Therefore, while the baking plate 4 conveyed by the conveying chain conveyor 3 in the baking chamber 2 is supported by the forward path chain conveyor 5 and the backward path chain conveyor 6, no frictional resistance or noise is generated. It can be stably conveyed in the state.
[0034]
For example, as another example, it is conceivable that guide rollers are fixedly disposed along the transport path of the transport chain conveyor, and a baking plate that is moved by these guide rollers is supported. Baking is likely to occur in a high temperature atmosphere, and if the above-described guide chain conveyor is used, it is possible to reduce the frictional resistance and to convey the baking plate satisfactorily. Further, the drive of the forward guide chain conveyor 5 and the return path chain conveyor 6 can be obtained from the arrangement state via the bevel gears 40, 41, 42 from the drive shaft 33 of the transport chain conveyor 3.
[0035]
In other words, the forward guide chain conveyor 5 and the return chain conveyor 6 are arranged on a plane perpendicular to the conveying 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 shafts 33 and the linkage drive shafts 53, 63 and the shafts are linked via the bevel gears 40, 41, 42, the forward-path guide chain conveyor. 5 and the return chain conveyor 6 rotate in opposite directions, and the drive mechanism with a relatively simple structure using only three bevel gears, the forward guide chain conveyor 5 and the return chain conveyor 6 are It can be driven by the motor 38 of the chain conveyor 3 for conveyance, 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 disposed in the firing chamber. However, a combustion heater that burns and heats gas or other fuel is disposed in the firing chamber, or heated 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 plate is heated and baked in the forward path and the return path, so that the length of the oven body is shortened compared to the through-type tunnel oven. It is possible to reduce the space occupied by the installation place, and the forward baking plate is supported by the forward guide chain conveyor, and the return baking plate is supported by the backward guide chain conveyor. Even if the baking plate is connected to the conveying chain conveyor in a single-sided state, the food can be baked while conveying the baking plate in a stable state within the oven body and with less frictional resistance and the like.
[Brief description of the drawings]
FIG. 1 is a front view of a tunnel oven showing an embodiment of the present invention.
FIG. 2 is a plan view of the tunnel oven.
FIG. 3 is a plan view with a section of the tunnel oven.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
5 is an enlarged VV sectional view of FIG.
6 is a cross-sectional view taken along the line VI-VI in FIG.
[Explanation of symbols]
1-oven body 2-baking chamber 3-conveying chain conveyor 4-baking plate 5-outward guide chain conveyor 6-return guide chain conveyor 31-conveyor chain 33-drive shaft 38-motors 40, 41, 42-shaft Gears 53, 63-linkage drive shaft

Claims (3)

A conveyor chain conveyor is laid in a tunnel-shaped oven body in a U-shaped turn on a horizontal plane, and a large number of baking plates are connected to the conveyor chain of the conveyor chain conveyor. In this state, the oven is a tunnel type oven that burns the food on the baking plate while moving the inside of the oven on the outward path including the U-turn and the return path,
On the side of the outbound path of the transport chain conveyor in the oven body, an outbound path guide chain conveyor is disposed so as to move horizontally along the outbound path while supporting the baking plate horizontally. On the side of the return path of the chain conveyor, a return path guide chain conveyor is disposed so as to move horizontally along the return path while horizontally supporting the baking plate, and the forward path guide chain conveyor and the return path guide chain. A tunnel-type oven characterized in that a conveyor is driven by a motor for driving the transfer chain conveyor. The forward guide chain conveyor and the backward guide chain conveyor are arranged to rotate each guide chain within a vertical plane of a side portion of the transport chain conveyor, and transport the upper transport path through the upper transport path. 2. The tunnel type oven according to claim 1, wherein the tunnel type oven is arranged in accordance with the position of the conveyor chain of the chain conveyor. A first bevel gear is attached to the drive shaft arranged in the vertical direction of the transfer chain conveyor, and a second bevel gear is attached to the linkage drive shaft arranged in the horizontal direction of the forward path chain conveyor, A third bevel gear is attached to the linkage drive shaft disposed in the horizontal direction of the return path guide chain conveyor, and the second bevel gear and the third bevel gear mesh with the first bevel gear. The tunnel oven according to claim 2, wherein:

Images