WO2019230792A1

WO2019230792A1 - Dough extending device

Info

Publication number: WO2019230792A1
Application number: PCT/JP2019/021272
Authority: WO
Inventors: 小野口　和良; 勝道樋口; 太郎福上; 章典 ▲高▼間; 孝雄酒井
Original assignee: レオン自動機株式会社
Priority date: 2018-06-01
Filing date: 2019-05-29
Publication date: 2019-12-05
Also published as: JP7113076B2; TW202011814A; JPWO2019230792A1; TWI727331B

Abstract

Provided is a dough extending device which has a comparatively large surface area for pressing dough, and is highly efficient at extending the same. A dough extending device (1) has a lower conveyor (4) which transports dough (D) from an upstream side to a downstream side, and an upper conveyor (10) which is disposed above the lower conveyor (4). The dough extending device (1) has a conveyor belt (10f). The conveyor belt (10f) has an arc-shaped lower surface (10fa), and the center of curvature thereof is positioned higher than the conveyor belt (10f). The upper conveyor (10) vibrates such that a location on the dough (D) pressed by the arc-shaped lower surface (10fa) moves from the upstream side to the downstream side.

Description

Fabric spreading device

The present invention relates to a dough spreading apparatus, and more particularly, to a dough spreading apparatus for continuously spreading dough such as bread dough conveyed by a lower conveyor.

2. Description of the Related Art Conventionally, there is known a fabric spreading device that spreads a fabric conveyed by a lower conveyor using a moving upper roller (see, for example, Patent Documents 1 to 3).

Japanese Patent Laid-Open No. 61-019444 Japanese Patent Laid-Open No. 03-061441 JP 2004008157 A

Since the diameter of the conventional upper roller is about 50 to 150 mm, the area for pressing the fabric is relatively small and the spreading efficiency is low. For this reason, it is necessary to provide a plurality of upper rollers in order to efficiently extend the continuously conveyed fabric, or to increase the diameter of the upper rollers in order to increase the pressing area. A conventional fabric spreading apparatus provided with a plurality of upper rollers moving along an endless track is complicated and large. Moreover, the surface of the cloth extended by a plurality of small diameter rollers may wave. When the diameter of the upper roller is increased, a space for it is required, the upper roller becomes heavier, and the fabric spreading device becomes larger.

Therefore, an object of the present invention is to provide a fabric spreading apparatus having a novel configuration with a relatively large area for pressing the fabric and high spreading efficiency.

In order to achieve the above object, a dough spreading apparatus according to the present invention includes a lower conveyor that conveys a dough from an upstream side to a downstream side, and an upper conveyor disposed above the lower conveyor. A conveyor belt, the conveyor belt has an arcuate lower surface driven from the upstream side to the downstream side, the center of curvature of the arcuate lower surface is located above the conveyor belt, It has a movement mechanism for moving the upper conveyor so that the pressing portion of the cloth by the arc-shaped lower surface moves from the upstream side to the downstream side.

</ RTI> According to the fabric spreading apparatus configured in this way, the lower surface of the conveyor belt of the upper conveyor has an arc shape and is driven from the upstream side to the downstream side. Since the center of curvature of the arc-shaped lower surface is located above the upper conveyor, the arc-shaped lower surface constitutes a part of the virtual large-diameter roller. In general, the pressed portion of the dough is in the vicinity of a portion of the arc-shaped lower surface having the smallest distance from the lower conveyor at a certain time. When the pressing part of the cloth by the arc-shaped lower surface moves from the upstream side to the downstream side by the motion mechanism, the same effect as that obtained by rolling the virtual large diameter roller on the cloth is obtained, and the cloth is extended. be able to. Thus, there is provided a fabric spreading apparatus having a novel configuration with a relatively large area for pressing the fabric and high spreading efficiency.

In the embodiment of the dough spreading apparatus, the lower conveyor includes a first lower conveyor and a second lower conveyor disposed on the downstream side of the first lower conveyor, and the speed of the second lower conveyor is the first lower conveyor. It may be faster than the speed of the conveyor, or it may be a single conveyor.

According to the dough extending apparatus having the first lower conveyor and the second lower conveyor, the dough can be stretched due to the speed difference between the second lower conveyor and the first lower conveyor, so that the dough can be efficiently extended. Can do. According to the fabric spreading device in which the lower conveyor is a single conveyor, a simple fabric spreading device can be configured.

Also, in the embodiment of the dough spreading apparatus, preferably, the speed of the conveyor belt of the upper conveyor is the same or faster than that of the lower conveyor, so that it is between the upper conveyor and the lower conveyor. The dough can be conveyed without stagnation.

In an embodiment having a first lower conveyor and a second lower conveyor, preferably the speed of the upper conveyor belt is equal to the speed of the first lower conveyor when the pressing point is above the first lower conveyor. When the pressing point is above the second lower conveyor, the speed of the upper conveyor belt is equal to the speed of the second lower conveyor.

Further, in the embodiment having the first lower conveyor and the second lower conveyor, if the dough between the upper conveyor and the lower conveyor is not stagnated, the upper conveyor is driven at a higher speed than the first lower conveyor, and the second lower conveyor The conveyor may be driven at a faster speed than the upper conveyor.

Thus, according to the dough extending apparatus having the first lower conveyor and the second lower conveyor, the dough can be extended mainly by stretching.

In the embodiment of the dough spreading apparatus, when the pressing location moves from the upstream side to the downstream side, the distance between the upper conveyor and the lower conveyor at the pressing location may be small or constant. When such a distance is reduced, the distance between the reference line determined by the carry-out direction of the lower conveyor and the upper conveyor at the pressed position may be reduced, or between the reference line and the lower conveyor at the pressed position. The distance may be reduced or both.

According to the dough spreading apparatus in which the distance between the upper conveyor and the lower conveyor is reduced, relatively thick dough can be spread efficiently. Moreover, according to the dough extending apparatus in which the distance between the upper conveyor and the lower conveyor is constant, the dough can be efficiently extended in both directions of the movement of the upper conveyor.

In the embodiment of the cloth spreading device, preferably, the cloth spreading apparatus further includes a cloth presser roller disposed above the lower conveyor for pressing the cloth entering the upper conveyor.

In the embodiment of the dough spreading apparatus, preferably, the upper conveyor has a plurality of small-diameter rollers, and the plurality of small-diameter rollers support the conveyor belt, and the conveyor belt has an arcuate lower surface. Is done. Preferably, the lower conveyor has a conveyor belt supported by a plurality of small-diameter rollers, and the plurality of small-diameter rollers of the lower conveyor are arranged such that the conveyor belt of the lower conveyor has a straight upper surface.

In the embodiment of the dough spreading apparatus, the movement mechanism may be a swinging mechanism that swings the upper conveyor or a sliding mechanism that slides the upper conveyor.

1 is a schematic front view of a fabric spreading device according to a first embodiment of the present invention. FIG. 2 is a schematic plan view of the fabric spreading device of FIG. 1. FIG. 3 is a schematic plan view of the fabric spreading device in FIG. 1 taken along line III-III in FIG. It is the schematic explaining the 1st example of a motion of an upper conveyor. It is the schematic explaining the 1st example of a motion of an upper conveyor. It is the schematic explaining the 1st example of a motion of an upper conveyor. It is the schematic explaining the 1st example of a motion of an upper conveyor. It is the schematic explaining the 2nd example of a motion of an upper conveyor. It is the schematic explaining the 2nd example of a motion of an upper conveyor. It is the schematic explaining the 2nd example of a motion of an upper conveyor. It is the schematic explaining the 2nd example of a motion of an upper conveyor. It is the schematic explaining the 3rd example of a motion of an upper conveyor. It is the schematic explaining the 3rd example of a motion of an upper conveyor. It is a schematic front view of the cloth spreading apparatus by the 2nd Embodiment of this invention. It is the schematic explaining the 1st example of a motion of an upper conveyor. It is the schematic explaining the 1st example of a motion of an upper conveyor. It is the schematic explaining the 1st example of a motion of an upper conveyor. It is the schematic explaining the 2nd example of a motion of an upper conveyor. It is the schematic explaining the 2nd example of a motion of an upper conveyor. It is the schematic explaining the 2nd example of a motion of an upper conveyor. It is a schematic front view of the cloth spreading apparatus by the 3rd Embodiment of this invention. FIG. 13 is a schematic plan view of the fabric spreading device of FIG. 12. It is the schematic explaining the example of a motion of an upper conveyor. It is the schematic explaining the example of a motion of an upper conveyor. It is the schematic explaining the example of a motion of an upper conveyor. It is the schematic explaining the example of a motion of an upper conveyor. It is the schematic explaining the example of a motion of an upper conveyor. It is the schematic explaining the example of a motion of an upper conveyor. It is a schematic front view of the cloth spreading apparatus by the 4th Embodiment of this invention. FIG. 16 is a schematic plan view of the fabric spreading device of FIG. 15. It is the schematic explaining the example of a motion of an upper conveyor. It is the schematic explaining the example of a motion of an upper conveyor. It is the schematic explaining the example of a motion of an upper conveyor. It is a schematic diagram of a cloth spreading device which has a plurality of upper conveyors. It is a schematic diagram of a cloth spreading device which has a plurality of upper conveyors. It is a schematic diagram of a cloth spreading device which has a plurality of upper conveyors.

As shown in FIG. 1, a dough spreading apparatus 1 which is a first embodiment of a dough spreading apparatus according to the present invention includes a main frame 2 and a dough D in sheet form from the upstream side to the downstream side, that is, in the flow direction F. Has a lower conveyor 4. In the present embodiment, the lower conveyor 4 includes a first lower conveyor 6 and a second lower conveyor 8 disposed on the downstream side of the first lower conveyor 6. The fabric spreading apparatus 1 further includes an upper conveyor 10 disposed above the lower conveyor 4. The fabric spreading apparatus 1 preferably includes a fabric supply conveyor 12 a disposed on the upstream side of the lower conveyor 4 and a fabric carry-out conveyor 12 b disposed on the downstream side of the lower conveyor 4.

The first lower conveyor 6 includes a small-diameter inlet roller 6a, a conveyor plate 6b, a small-diameter outlet roller 6c, a driving roller 6d, and a first lower conveyor belt 6e wound around the

rollers

6a, 6c, and 6d, A drive motor 6f is connected to the drive roller 6d. The entrance roller 6a and the exit roller 6c are arranged so that the first lower conveyor belt 6e between them is horizontal, and the conveyor plate 6b moves the first lower conveyor belt 6e between the entrance roller 6a and the exit roller 6c. Supports horizontally. The diameters of the entrance roller 6a and the exit roller 6c are, for example, 10 to 20 mm. The first lower conveyor belt 6e is made of urethane, for example.

The second lower conveyor 8 includes a large-diameter inlet roller 8a, a conveyor plate 8b, a large-diameter outlet roller 8c, a driving roller 8d, and a second lower conveyor belt 8e wound around the

rollers

8a, 8c, and 8d. And a drive motor 8f coupled to the drive roller 8d. The entrance roller 8a and the exit roller 8c are arranged such that the second lower conveyor belt 8e therebetween is horizontal. The conveyor plate 8b horizontally supports the second lower conveyor belt 8e between the entrance roller 8a and the exit roller 8c. The diameters of the entrance roller 8a and the exit roller 8c are, for example, 100 to 150 mm. The second lower conveyor belt 8e is made of, for example, stainless steel or urethane. In the present embodiment, the second lower conveyor belt 8e between the entrance roller 8a and the exit roller 8c defines the direction in which the material D is discharged from the lower conveyor 4. A reference line 20 is defined along this discharge direction (see FIG. 4a).

The upper conveyor 10 includes a large-diameter inlet roller 10a, an inlet roller shaft 10b attached to the inlet roller 10a, an upper conveyor plate 10c, a large-diameter outlet roller 10d, and an outlet roller shaft attached to the outlet roller 10d. 10e, an upper conveyor belt 10f wound around

rollers

10a and 10d, and a drive motor 10g (see FIG. 2) connected to the inlet roller shaft 10b.

The upper conveyor plate 10 c has a lower surface 10 ca that forms an arc along the flow direction F. The entrance roller 10a and the exit roller 10d are arranged such that the upper conveyor belt 10f is pressed against the lower surface 10ca. Thus, the upper conveyor belt 10f of the upper conveyor 10 has an arc lower surface 10fa (see FIG. 4a) driven from the upstream side to the downstream side. The diameters of the entrance roller 10a and the exit roller 10d are, for example, 100 to 150 mm. The upper conveyor belt 10f is made of, for example, stainless steel or urethane. The center of curvature of the lower surface of the arc is located above the upper conveyor belt 10f. The radius of the arc is preferably greater than 500 mm, for example 1 m. Therefore, the upper conveyor 10 constitutes a part of the virtual large diameter roller 22 having a diameter of 2 m, for example (see FIG. 4a).

As shown in FIGS. 1 and 2, the dough spreading apparatus 1 has a swing mechanism 14 that swings the upper conveyor 10 (see FIGS. 4a to 7). The swing mechanism 14 includes a fulcrum bracket 14a fixed to the main frame 2 at a position between the inlet roller 10a and the outlet roller 10d on both the left and right sides in the flow direction F, a fulcrum shaft 14b fixed to the fulcrum bracket 14a, A fulcrum arm 14c pivotably mounted on the fulcrum shaft 14b and pivotally mounted on the inlet roller shaft 10b, and pivotably mounted on the inlet roller shaft 10b and pivotable on the outlet roller shaft 10e. 14d has an upper conveyor frame 14d. A bracket 14e that supports the drive motor 10g is attached to the right fulcrum arm 14c. The fulcrum arm 14c and the upper conveyor frame 14d are arranged such that the entrance roller 10a and the exit roller 10d of the upper conveyor 10 move substantially up and down.

As shown in FIGS. 1 and 3, the swing mechanism 14 further includes an inlet roller moving mechanism 16 that moves the inlet roller 10a in the vertical direction and an outlet roller moving mechanism 18 that moves the outlet roller 10d in the vertical direction. doing. The entrance roller moving mechanism 16 has a drive motor 16a and a drive shaft 16b connected to the drive motor 16a and extending in the left-right direction. The entrance roller moving mechanism 16 is further fixed to the drive shaft 16b and pivotally attached to the intermediate shaft 16d on both the left and right sides in the flow direction F, and is pivotally attached to the intermediate shaft 16d. A rod 16e is pivotally attached to the inlet roller shaft 10b. The exit roller moving mechanism 18 has a drive motor 18a and a drive shaft 18b connected to the drive motor 18a and extending in the left-right direction. The exit roller moving mechanism 18 is further fixed to the drive shaft 18b and pivotally attached to the intermediate shaft 18d on both the left and right sides in the flow direction F, and is pivotally attached to the intermediate shaft 18d. A rod 18e is pivotally attached to the outlet roller shaft 10e.

The fabric spreading apparatus 1 further includes a controller (not shown) that controls the

drive motors

6f, 8f, 10g, 16a, and 18a. A controller (not shown) performs the swing motion by controlling the operation of the entrance roller moving mechanism 16 and the exit roller moving mechanism 18 and the speed of the lower conveyor and the upper conveyor.

Next, some examples of the swinging motion of the upper conveyor 10 will be described.

FIGS. 4a to 4c are schematic diagrams showing a first position (FIG. 4a), a second position (FIG. 4b), and a third position (FIG. 4c) in the first example of the swinging motion of the upper conveyor 10. FIG. FIG. 5 is a diagram showing the upper conveyor 10 in the first position, the second position, and the third position in an overlapping manner. By the swinging movement that moves from the first position to the third position, the pressing position of the fabric D by the lower surface 10fa of the arc of the upper conveyor belt 10f moves from the upstream side to the downstream side. The pressed location is generally near the location of the bottom surface 10fa of the arc having the smallest distance from the lower conveyor 4 at a certain point in time. Therefore, the pressed portion is represented by the lowest position 24 of the lower surface 10fa of the arc, and is indicated by a black circle. The locus 26 of the lowest position 24 in the first example is a straight line, and the vertical distance between the locus 26 and the reference line 20 decreases from the upstream side toward the downstream side (see FIG. 5). That is, when the pressing location moves from the upstream side to the downstream side, the distance between the upper conveyor 10 and the lower conveyor 4 at the pressing location becomes small. Subsequently, in a reverse operation, a swinging movement is performed to move from the third position to the first position.

FIGS. 6a to 6c schematically show the first position (FIG. 6a), the second position (FIG. 6b), and the third position (FIG. 6c) in the second example of the swinging motion of the upper conveyor 10. FIG. FIG. 7 is a diagram illustrating the upper conveyor 10 in the first position, the second position, and the third position in an overlapping manner. By the swinging movement that moves from the first position to the third position, the pressing position of the fabric D by the lower surface 10fa of the arc of the upper conveyor belt 10f moves from the upstream side to the downstream side. The pressed location is generally near the location of the bottom surface 10fa of the arc having the smallest distance from the lower conveyor 4 at a certain point in time. Therefore, the pressed portion is represented by the lowest position 24 of the lower surface 10fa of the arc, and is indicated by a black circle. The locus 26 of the lowest position 24 in the second example is a straight line, and the vertical distance between the locus 26 and the reference line 20 is constant from the upstream side toward the downstream side (see FIG. 7). That is, when the pressing location moves from the upstream side to the downstream side, the distance between the upper conveyor 10 and the lower conveyor 4 at the pressing location is constant. Subsequently, in a reverse operation, a swinging movement is performed to move from the third position to the first position.

8a to 8b are schematic front views showing the fourth position (FIG. 8a) and the fifth position (FIG. 8b) in the third example of the swinging motion of the upper conveyor 10. FIG. In the third example, the swinging movement that moves from the first position to the third position is the same as in the first example or the second example. Subsequently, the upper conveyor 10 is raised and moved to the fourth position and the fifth position, and the lowermost position 24 of the lower surface 10fa of the arc is separated from the fabric D in the state where it is separated from the downstream side to the upstream side. Move to. Subsequently, the upper conveyor 10 is lowered and returned to the first position.

Next, the operation of the fabric spreading device 1 will be described.

The first lower conveyor 6 is operated at a speed V1, and the second lower conveyor 8 is operated at a speed V2 that is faster than the speed V1. Further, the upper conveyor belt 10f is driven at the same speed with respect to the

lower conveyors

6 and 8. Specifically, when the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the first lower conveyor 6, the speed of the upper conveyor belt 10f is the same as the speed V1 of the first lower conveyor 6. To speed. When the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the second lower conveyor 8, the speed of the upper conveyor belt 10f is set to the same speed as the speed V2 of the second lower conveyor 8. . The switching of the speed of the upper conveyor belt 10f is performed, for example, when the lowest position 24 comes between the first lower conveyor 6 and the second lower conveyor 8.

Also, the upper conveyor 10 is swung. The swing speed, that is, the moving speed in the flow direction F of the lowermost position 24 of the lower surface 10fa of the arc is determined to be at least faster than the speed V2 of the second lower conveyor 8. Assuming that the moving speed of the lowest position 24 is the same as the speed of the lower conveyor 4, the location of the fabric D pressed by the upper conveyor 10 (virtual large diameter roller 22) does not change. By increasing the moving speed of the lowest position 24, the cloth D in a wide range is pressed by the action that the virtual large diameter roller 22 rolls, and the spreading efficiency is improved.

4a to 4c and FIG. 5, when the upper conveyor 10 swings from the first position to the second position, the upper conveyor 10 and the first lower conveyor 6 Since the distance between the two becomes small, the fabric D is efficiently spread. When the upper conveyor 10 swings from the first position to the second position, the lowermost position 24 operates from the upper side of the first lower conveyor 6 operating at the speed V1 to the second lower conveyor 8 operating at the speed V2. Since the speed of the upper conveyor belt 10f of the upper conveyor 10 is switched from V1 to V2, the fabric D is stretched in the flow direction F and efficiently spread. When the upper conveyor 10 swings from the second position to the third position, the distance between the upper conveyor 10 and the second lower conveyor 8 is further reduced, so that the fabric D is efficiently spread. On the other hand, when the upper conveyor 10 returns from the third position to the first position, there is a little action of pushing the dough D back to the upstream side. Moreover, since the distance between the upper conveyor 10 and the 1st lower conveyor 6 becomes large, material | dough is not extended so much. By repeating the above operation, the fabric spreading device 1 spreads while conveying the fabric D between the upper conveyor 10 and the

lower conveyors

6 and 8.

In the case of the swing motion of the second example shown in FIGS. 6a to 6c and FIG. 7, when the upper conveyor 10 swings from the first position to the second position, the upper conveyor 10 and the first lower conveyor 6 The distance between the two is constant, and the fabric D is extended according to the distance. When the upper conveyor 10 swings from the first position to the second position, the lowermost position 24 operates from the upper side of the first lower conveyor 6 operating at the speed V1 to the second lower conveyor 8 operating at the speed V2. Since the speed of the upper conveyor belt 10f of the upper conveyor 10 is switched from V1 to V2, the fabric D is stretched in the flow direction F and efficiently spread. When the upper conveyor 10 swings from the second position to the third position, the distance between the upper conveyor 10 and the second lower conveyor 8 is constant, and the fabric D is extended according to the distance. When returning from the third position to the first position, there is a slight action to push the dough D upstream, but the dough D is extended according to the distance between the upper conveyor 10 and the second lower conveyor 8. . By repeating the above operation, the fabric spreading device 1 spreads while conveying the fabric D between the upper conveyor 10 and the

lower conveyors

6 and 8.

In the case of the swinging motion of the third example, when the upper conveyor 10 swings from the first position to the third position, it is the same as the first example or the second example. When the upper conveyor 10 is raised and swung from the fourth position to the fifth position, the upper conveyor belt 10f of the upper conveyor 10 is separated from the cloth D, so that the cloth D is not spread. On the other hand, unlike the first example and the second example, there is no action to push the dough D back to the upstream side. By repeating the above operation, the fabric spreading device 1 spreads while conveying the fabric D between the upper conveyor 10 and the

lower conveyors

6 and 8.

Next, with reference to FIG. 9, a fabric spreading device 30 which is a second embodiment of the fabric spreading device according to the present invention will be described. The fabric spreading device 30 has the same configuration as the fabric spreading device 1 according to the first embodiment except for the first lower conveyor 32. Therefore, in 2nd Embodiment, the code | symbol similar to 1st Embodiment is attached | subjected to components other than the 1st lower conveyor 32, and the description is abbreviate | omitted.

The first lower conveyor 32 includes a small-diameter inlet roller 32a, a conveyor plate 32b, a small-diameter outlet roller 32c, a driving roller 32d, and a first lower conveyor belt 32e wound around the

rollers

32a, 32c, and 32d, A drive motor 32f is connected to the drive roller 32d. The entrance roller 32a, the exit roller 32c, and the drive roller 32d are arranged such that the first lower conveyor belt 32e therebetween is inclined at an angle α with respect to the reference line 20, and the conveyor plate 32b is connected to the entrance roller 32a and the drive roller 32d. The first lower conveyor belt 32e between the exit rollers 32c is supported at an angle α. The diameters of the entrance roller 6a and the exit roller 6c are, for example, 10 to 20 mm. The first lower conveyor belt 6e is made of urethane, for example.

The swing motion of the upper conveyor 10 is the same as that of the first embodiment. The swinging motion of the first example is shown in FIGS. 10a to 10c instead of FIGS. 4a to 4c, and the swinging motion of the second example is shown in FIGS. 11a to 11c instead of FIGS. 6a to 6c. The description is omitted. The description of the swinging motion of the third example will be omitted by referring to FIGS. 8a to 8b.

Next, the operation of the fabric spreading device 30 will be described.

The first lower conveyor 32 is operated at a speed V1, and the second lower conveyor 8 is operated at a speed V2 that is faster than the speed V1. Further, the upper conveyor belt 10f is driven at the same speed with respect to the

lower conveyors

32 and 8. Specifically, when the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the first lower conveyor 32, the speed of the upper conveyor belt 10f is the same as the speed V1 of the first lower conveyor 32. To speed. Further, when the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the second lower conveyor 8, the speed of the upper conveyor 10 is set to the same speed as the speed V2 of the second lower conveyor 8. The speed of the upper conveyor belt 10f is switched when, for example, the lowest position 24 comes between the first lower conveyor 32 and the second lower conveyor 8.

Also, the upper conveyor 10 is swung. The swing speed, that is, the moving speed in the flow direction F of the lowermost position 24 of the lower surface 10fa of the arc is determined to be at least faster than the speed of the second lower conveyor 8. Assuming that the moving speed of the lowest position 24 is the same as the speed of the lower conveyor 4, the location of the fabric D pressed by the upper conveyor 10 (virtual large diameter roller 22) does not change. By increasing the moving speed of the lowest position 24, the cloth D in a wide range is pressed by the action that the virtual large diameter roller 22 rolls, and the spreading efficiency is improved.

In the case of the swinging motion of the first example shown in FIGS. 10a to 10c, when the upper conveyor 10 swings from the first position to the second position, it is between the upper conveyor 10 and the first lower conveyor 32. Since the distance is reduced, the fabric D is efficiently extended. When the upper conveyor 10 swings from the first position to the second position, the lowermost position 24 operates from the upper side of the first lower conveyor 32 operating at the speed V1 to the second lower conveyor 8 operating at the speed V2. Since the speed of the upper conveyor belt 10f of the upper conveyor 10 is switched from V1 to V2, the fabric D is stretched in the flow direction F and efficiently spread. When the upper conveyor 10 swings from the second position to the third position, the distance between the upper conveyor 10 and the second lower conveyor 8 is further reduced, so that the fabric D is efficiently spread. On the other hand, when the upper conveyor 10 returns from the third position to the first position, there is a little action of pushing the dough D back to the upstream side. Moreover, since the distance between the upper conveyor 10 and the 1st lower conveyor 32 becomes large, material | dough is not extended so much. By repeating the above operation, the fabric spreading device 1 extends the fabric D while conveying the fabric D between the upper conveyor 10 and the

lower conveyors

32 and 8.

In the case of the swinging motion of the second example shown in FIGS. 11a to 11c, when the upper conveyor 10 swings from the first position to the second position, the upper conveyor 10 Since the distance to the first lower conveyor 32 is reduced, the fabric D is efficiently extended. When the upper conveyor 10 swings from the first position to the second position, the lowermost position 24 operates from the upper side of the first lower conveyor 32 operating at the speed V1 to the second lower conveyor 8 operating at the speed V2. Since the speed of the upper conveyor belt 10f of the upper conveyor 10 is switched from V1 to V2, the fabric D is stretched in the flow direction F and efficiently spread. When the upper conveyor 10 swings from the second position to the third position, the distance between the upper conveyor 10 and the second lower conveyor 8 is constant, and the fabric D is extended according to the distance. When the upper conveyor 10 returns from the third position to the second position, there is a slight action to push the dough D upstream, but the dough depends on the distance between the upper conveyor 10 and the second lower conveyor 8. It is extended. In addition, when the upper conveyor 10 returns from the second position to the first position, there is a slight action of pushing the dough D back to the upstream side. Moreover, since the distance between the upper conveyor 10 and the 1st lower conveyor 32 becomes large, material | dough is not extended so much. By repeating the above operation, the fabric spreading device 1 extends the fabric D while conveying the fabric D between the upper conveyor 10 and the

lower conveyors

32 and 8.

In the case of the swinging motion of the third example, when the upper conveyor 10 swings from the first position to the third position, it is the same as the first example or the second example. When the upper conveyor 10 is raised and swung from the fourth position to the fifth position, the upper conveyor belt 10f of the upper conveyor 10 is separated from the cloth D, so that the cloth D is not spread. On the other hand, unlike the first example and the second example, there is no action of pushing the fabric D back to the upstream side. By repeating the above operation, the fabric spreading device 1 extends the fabric D while conveying the fabric D between the upper conveyor 10 and the

lower conveyors

32 and 8.

Next, with reference to FIG.12 and FIG.13, the cloth extending apparatus 40 which is 3rd Embodiment of the cloth extending apparatus by this invention is demonstrated. The fabric spreading device 40 has the same configuration as the fabric spreading device 1 according to the first embodiment except that the swing mechanism 14 is changed to a sliding mechanism. Therefore, in 3rd Embodiment, the code | symbol similar to 1st Embodiment is attached | subjected to components other than a sliding mechanism, and the description is abbreviate | omitted.

12 and 13, the fabric spreading device 40 has a sliding mechanism 44 that slides the upper conveyor 10. The sliding mechanism 44 includes a linear rail 44a fixed to the main frame 2 in the flow direction F, a sliding block 44b that slides along the linear rail 44a, and a sliding block 44b on both the left and right sides in the flow direction F. The upper conveyor frame 44c is fixed and pivotally attached to the inlet roller shaft 10b and the outlet roller shaft 10e. A bracket 44d that supports the drive motor 10g is attached to the upper conveyor frame 44c on the right side.

The sliding mechanism 44 further includes a drive mechanism 46 that drives the upper conveyor frame 44c. The drive mechanism 46 includes a drive motor 46a, an arm 46b connected to the drive motor 46a, and a connection shaft 46c pivotally connected to the arm 46b and the upper conveyor frame 44c.

The fabric spreading device 40 further includes a controller (not shown) that controls the

drive motors

6f, 8f, 10g, and 46a. A controller (not shown) controls the operation of the sliding mechanism 44 and the speeds of the lower conveyor 4 and the upper conveyor 10 to perform the sliding motion described below.

Next, an example of the sliding movement of the upper conveyor 10 will be described.

14a to 14f are a first position (FIG. 14a), a second position (FIG. 14b), a third position (FIG. 14c), and a fourth position (FIG. 14) in the example of the sliding motion of the upper conveyor 10. 14d), a schematic front view showing a fifth position (FIG. 14e) and a sixth position (FIG. 14f). By the sliding movement that moves from the first position to the fourth position, the pressing position of the fabric D by the lower surface 10fa of the arc of the upper conveyor belt 10f moves from the upstream side to the downstream side. The pressed location is generally near the location of the bottom surface 10fa of the arc having the smallest distance from the lower conveyor 4 at a certain point in time. Therefore, the pressed portion is represented by the lowest position 24 of the lower surface 10fa of the arc, and is indicated by a black circle. The locus 26 of the lowest position 24 in this example is a straight line, and the vertical distance between the locus 26 and the reference line 20 is constant from the upstream side toward the downstream side. That is, when the pressing location moves from the upstream side to the downstream side, the distance between the upper conveyor 10 and the lower conveyor 4 at the pressing location is constant. Subsequently, in a reverse operation, a sliding motion is performed in which the fourth position moves to the sixth position and the sixth position moves to the first position.

Next, the operation of the fabric spreading device 40 will be described.

The first lower conveyor 6 is operated at a speed V1, and the second lower conveyor 8 is operated at a speed V2 that is faster than the speed V1. Further, the upper conveyor 10 is slid from the first position to the fourth position (from the upstream side to the downstream side) with respect to the main frame 2 at the sliding speed V3, and subsequently the upper conveyor 10 is moved to the fourth position. To the sixth position and the sixth position to the first position (from the downstream side to the upstream side) with respect to the main frame 2 at the sliding speed V3.

The upper conveyor belt 10f is driven at the same speed with respect to the

lower conveyors

6 and 8. Specifically, when the sliding of the upper conveyor 10 stops and the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the first lower conveyor 6 (first position in FIG. 14a). The speed of the upper conveyor belt 10f is set to the same speed as the speed V1 of the first lower conveyor 6. When the upper conveyor 10 slides from the upstream side to the downstream side at a speed V3 and the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the first lower conveyor 6 (the second conveyor in FIG. 14b). Position), the speed V4 of the upper conveyor belt 10f with respect to the upper conveyor 10 is set to V1-V3. When the upper conveyor 10 slides from the upstream side to the downstream side at the speed V3 and the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the second lower conveyor 8 (the third conveyor in FIG. 14c). Position), the speed V5 of the upper conveyor belt 10f with respect to the upper conveyor 10 is set to V2-V3. When the upper conveyor 10 stops sliding and the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the second lower conveyor 8 (fourth position in FIG. 14d), the upper conveyor belt 10f. Is set to the same speed as the speed V2 of the second lower conveyor 8. When the upper conveyor 10 slides from the downstream side to the upstream side at the speed V3, and the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the second lower conveyor 8 (the fifth in FIG. 14e) Position), the speed V6 of the upper conveyor belt 10f with respect to the upper conveyor 10 is set to V2 + V3. When the upper conveyor 10 slides from the downstream side to the upstream side at the speed V3 and the fabric D pressed by the lower surface 10fa of the upper conveyor belt 10f is mainly located on the first lower conveyor 6 (the sixth of FIG. Position), the speed V7 of the upper conveyor belt 10f with respect to the upper conveyor 10 is set to V1 + V3. For example, the lowermost position 24 of the lower surface 10fa of the upper conveyor belt 10f can be switched between the first lower conveyor 6 and the second lower conveyor 8 while the upper conveyor 10 is sliding. When you come to.

The sliding speed V3 of the upper conveyor 10, that is, the moving speed in the flow direction F of the lowest position 24 of the lower surface 10fa of the arc is determined to be at least faster than the speed V2 of the second lower conveyor 8. Assuming that the moving speed of the lowest position 24 is the same as the speed of the lower conveyor 4, the location of the fabric D pressed by the upper conveyor 10 (virtual large diameter roller 22) does not change. By increasing the moving speed of the lowest position 24, the cloth D in a wide range is pressed by the action that the virtual large diameter roller 22 rolls, and the spreading efficiency is improved.

When the upper conveyor 10 slides from the first position to the second position, the distance between the upper conveyor 10 and the first lower conveyor 6 is constant, and the fabric D is extended according to the distance. When the upper conveyor 10 slides from the second position to the third position, the lowest position 24 moves from above the first lower conveyor 6 operating at the speed V1 to above the second lower conveyor 8 operating at the speed V2. Since the speed of the upper conveyor belt 10f with respect to the upper conveyor 10 is switched from V4 to V5, the fabric D is stretched in the flow direction F and efficiently spread. When the upper conveyor 10 slides from the third position to the fourth position, the distance between the upper conveyor 10 and the second lower conveyor 8 is constant, and the fabric D is extended according to the distance. When returning from the fourth position to the first position, there is a slight action to push the dough D upstream, but the dough D is extended according to the distance between the upper conveyor 10 and the

lower conveyors

6, 8. . Thus, the fabric spreading apparatus 1 extends the fabric D while transporting the fabric D between the upper conveyor 10 and the

lower conveyors

6 and 8.

When the swing mechanism is adopted, the space of the upper conveyor 10 can be made relatively small and the swing motion can be set relatively freely, but the mechanism itself is relatively complicated. When the sliding mechanism is employed, the space of the upper conveyor 10 becomes longer in the flow direction and the degree of freedom of sliding motion is relatively small, but the mechanism itself is relatively simple.

Next, with reference to FIG. 15, a fabric spreading device 50, which is a fourth embodiment of the fabric spreading device according to the present invention, will be described. The fabric spreading device 50 has the same configuration as the fabric spreading device 1 according to the first embodiment except for the upper roller unit 52 of the upper conveyor 10, the lower roller unit 54 of the second lower conveyor 8, and the fabric pressing roller 56. doing. Therefore, in the fourth embodiment, constituent elements other than the upper roller unit 52, the lower roller unit 54, and the fabric holding roller 56 are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

The dough spreading apparatus 50 includes an upper roller unit 52 instead of the upper conveyor plate 10c of the upper conveyor 10 of the dough spreading apparatus 1 according to the first embodiment. The upper roller unit 52 of the upper conveyor 10 includes a large number of small-diameter rollers 52a. The small-diameter rollers 52a support the upper conveyor belt 10f, and the upper conveyor belt 10f is driven from the upstream side to the downstream side. It arrange | positions so that it may have the lower surface 10fa of the circular arc. The upper roller unit 52 further includes a number of shafts 52b that support the small-diameter rollers 52a, a number of brackets 52c that support the shafts 52b, and a base 52d to which the number of brackets are attached. The outer diameter of the small diameter roller 52a is, for example, 30 to 40 mm. In order to increase the arrangement density of the small diameter rollers 52a, it is preferable to arrange the small diameter rollers 52a in a staggered arrangement (see FIG. 16).

The dough spreading apparatus 50 includes a lower roller unit 54 instead of the entrance roller 8a of the dough spreading apparatus 1 and the conveyor plate 8b of the second lower conveyor 8 according to the first embodiment. The lower roller unit 54 of the second lower conveyor 8 includes an inlet plate 54a having a small-diameter inlet roller, a large number of small-diameter rollers 54b, and an intermediate plate 54c. The inlet plate 54a, the small-diameter roller 54b, the intermediate plate 54c, and the outlet roller 8c support the second lower conveyor belt 8e therebetween, and the second lower conveyor belt 8e is linear (horizontal). Are arranged as follows. The lower roller unit 54 further includes a number of shafts 54d that support the small-diameter roller 54b, a number of brackets 54e that support the shaft 54d, and a base 54f to which the number of brackets are attached. The outer diameter of the small diameter roller 54b is, for example, 30 to 40 mm. In order to increase the arrangement density of the small-diameter rollers 54b, it is preferable to arrange the small-diameter rollers 54b in a staggered manner (not shown) as in the upper roller unit 52.

Moreover, the cloth spreading device 50 has a cloth pressing roller 56 for pressing the cloth D entering the upper conveyor 10. The material presser roller 56 is disposed above the first lower conveyor 6 and upstream of the upper conveyor 10. The fabric pressing roller 56 is attached to the main frame 2 so that the height with respect to the first lower conveyor 6 can be adjusted. The fabric pressing roller 56 is driven by a motor 56a so that the rotation speed can be adjusted.

Next, the operation of the fabric spreading device 50 will be described.

The first lower conveyor 6 is operated at a speed V1, and the second lower conveyor 8 is operated at a speed V2 that is faster than the speed V1. The fabric presser roller 56 is operated at a peripheral speed slightly faster than the speed V1 of the first lower conveyor 8 to prevent the fabric D from staying in front of the fabric presser roller 56. Further, the upper conveyor 10 is driven at a speed V3 that is faster than the speed V1 of the first lower conveyor 6. The speed V2 of the second lower conveyor 8 is set to be higher than the speed V3 of the upper conveyor 10. The upper roller unit 52 of the upper conveyor 10 and the lower roller unit 54 of the second lower conveyor 8 prevent the upper conveyor belt 10f and the second lower conveyor belt 8e from slipping with respect to the

drive rollers

10e, 8d, thereby spreading the fabric D. Improve.

In addition, since there are many places where the lower surface 10fa of the arc of the upper conveyor belt 10f is supported by many small-diameter rollers 54b and there are many places where it is not supported, the lower surface 10fa of the upper conveyor belt 10f is pressed when the fabric D is pressed. Concavities and convexities are formed, preventing slippage of the lower surface 10fa of the arc of the conveyor belt 10f with respect to the fabric D and improving the spread of the fabric D. Further, by forming irregularities on the surface of the lower surface 10fa of the arc of the conveyor belt 10f, the fabric D pressed by a large number of convex portions can escape to the adjacent concave portions, and the spreading of the fabric is improved.

Also, the upper conveyor 10 is swung. The swing speed, that is, the moving speed in the flow direction F of the lowermost position 24 of the lower surface 10fa of the arc is determined to be about 8 to 17 times the speed V2 of the second lower conveyor 8. By the action that the virtual large-diameter roller 22 rolls, the cloth D in a wide range is pressed and the spreading efficiency is improved. Further, by increasing the swing speed of the upper conveyor 10, unevenness on the surface of the fabric D caused by the swing motion is reduced. Since the speed V3 of the upper conveyor 10 is constant, the speed switching of the upper conveyor 10 performed in the first to third embodiments can be omitted.

FIGS. 17a to 17c show a first position (FIG. 17a), a second position (FIG. 17b), and a third position (FIG. 17) of the same swinging movement as shown in FIGS. 4a to 4c. 17c). When the upper conveyor 10 swings from the first position to the second position, the distance between the upper conveyor 10 and the first lower conveyor 6 is reduced, so that the extension of the fabric D by the virtual large-diameter roller 22 is efficient. Done. Furthermore, since the speed V3 of the upper conveyor 10 is faster than the speed V1 of the first lower conveyor 6, the fabric D (particularly the upper side) between the upper conveyor 10 and the fabric pressing roller 56 is stretched in the flow direction F, and the fabric is D is efficiently extended. When the upper conveyor 10 swings from the second position to the third position, the distance between the upper conveyor 10 and the second lower conveyor 8 is further reduced. Done efficiently. Further, since the speed V2 of the second lower conveyor 8 is faster than the speed V3 of the upper conveyor 10, the fabric D (particularly the lower side) between the upper conveyor 10 and the fabric pressing roller 56 is stretched in the flow direction F, The fabric D is efficiently spread. That is, the upper side and lower side spreading of the fabric D is performed alternately. Further, when the upper conveyor 10 returns from the third position to the first position, there is an action of pushing back the fabric D to the upstream side, and there is an effect of extracting the gas in the fabric D. On the other hand, since the distance between the upper conveyor 10 and the first lower conveyor 6 is increased, the virtual large diameter roller 22 does not extend the fabric D so much, but the stretching between the upper conveyor 10 and the fabric pressing roller 56 is not performed. Since this is done, the fabric D is efficiently spread. By repeating the above operation, the fabric spreading device 50 extends the fabric D while conveying the fabric D between the upper conveyor 10 and the

lower conveyors

6 and 8.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims. Needless to say, these are also included within the scope of the present invention.

In the above embodiment, the speed of the upper conveyor belt 10f (relative to the main frame 2) is the same as the speed of the lower conveyor 4, but may be faster than the speed of the lower conveyor 4. In the said embodiment, although the speed of the 2nd lower conveyor was made faster than the speed of the 1st lower conveyor, these speeds may be the same. In the above embodiment, the lower conveyor has the first lower conveyor and the second lower conveyor, but may be a single lower conveyor. In the above embodiment, the lower conveyor 4 is arranged so that the reference line 20 is horizontal, but may be arranged so that the reference line is inclined.

If the dough between the upper conveyor and the lower conveyor is not stagnated, the lower conveyor may be driven at a higher speed than the upper conveyor. The fabric pressing roller 56 described in the fourth embodiment may be added to any embodiment, and the spreading efficiency may be improved by stretching the fabric D between the upper conveyor 10 and the fabric pressing roller 56. Moreover, you may employ | adopt the

small diameter rollers

52a and 54b demonstrated in 4th Embodiment in arbitrary embodiments.

In the third embodiment, the upper conveyor 10 is slid in parallel with the reference line 20, but is slid obliquely with respect to the reference line 20, and the pressed portion (the lowest position 24 in the embodiment) is upstream. When moving from the side to the downstream side, the distance between the upper conveyor and the lower conveyor at the pressed location may be reduced.

In the above embodiment, the lower surface 10fa of the upper conveyor belt 10f is an arc, but may be an arc shape, that is, may have a convex outline including an arc having a large curvature. The center of curvature of the arc-shaped lower surface is the center of curvature of the arc, and is preferably above the upper conveyor belt 10f in order to ensure a large curvature. The convex contour may be a combination of a plurality of arcs, curves, and / or straight lines.

In the above embodiment, the locus 26 of the lowest position 24 is a straight line. However, the locus 26 is not limited to a straight line, and may be, for example, an arc, a locus combining arcs, or a straight line. A trajectory combining arcs and arcs, or other curves may be used.

In the above embodiment, the fabric spreading apparatus has one upper conveyor 10, but a plurality of upper conveyors 10 may be combined to constitute the fabric spreading apparatus.

For example, in the example illustrated in FIG. 18, the fabric spreading device 51 includes two upper conveyors 10 and three

lower conveyors

52, 53, and 54. The upstream upper conveyor 10 is disposed above the upstream lower conveyor 52 and the intermediate lower conveyor 53, and the downstream upper conveyor 10 is disposed above the intermediate lower conveyor 53 and the downstream lower conveyor 54. Is done. The speed V2 of the intermediate lower conveyor 53 is faster than the speed V1 of the upstream lower conveyor 52, and the speed V3 of the downstream lower conveyor 54 is faster than the speed V2 of the intermediate lower conveyor 53. The upper conveyor 10 operates in the same manner as in the first embodiment or the third embodiment.

For example, in the example shown in FIG. 19, the dough spreading apparatus 61 includes two upper conveyors 10 and three

lower conveyors

62, 63, 64. The upstream upper conveyor 10 is disposed above the upstream lower conveyor 62 and the intermediate lower conveyor 63, and the downstream upper conveyor 10 is disposed above the downstream lower conveyor 64. The speed V2 of the intermediate lower conveyor 63 is higher than the speed V1 of the upstream lower conveyor 62, and the speed V3 of the downstream lower conveyor 64 is higher than the speed V2 of the intermediate lower conveyor 63. The upper conveyor 10 on the upstream side operates in the same manner as in the first embodiment or the third embodiment. The upper conveyor 10 on the downstream side operates similarly to the first embodiment or the third embodiment except that the speed is constant at V3.

For example, in the example illustrated in FIG. 20, the fabric spreading device 71 includes two upper conveyors 10 and four

lower conveyors

72, 73, 74, and 75. The upstream upper conveyor 10 is arranged above the upstream lower conveyor 72 and the second lower conveyor 73, and the downstream upper conveyor 10 is above the third lower conveyor 73 and the downstream lower conveyor 74. Placed in. The speed V2 of the second lower conveyor 73 is higher than the speed V1 of the upper lower conveyor 72, and the speed V3 of the third lower conveyor 74 is higher than the speed V2 of the second lower conveyor 73 and is downstream. The speed V4 of the lower conveyor 75 is faster than the speed V3 of the third lower conveyor 74. The upper conveyor 10 on the upstream side operates in the same manner as in the first embodiment or the third embodiment.

1 Material spreading device 4 Lower conveyor 6 First lower conveyor (lower conveyor)
8 Second lower conveyor (lower conveyor)
10 Upper conveyor 10f Upper conveyor belt (conveyor belt)
10fa bottom surface 14 swing mechanism (motion mechanism)
20 Reference line 24 Bottom position (pressed point)
30 Dough spreader 32 First lower conveyor (lower conveyor)
40 Fabric spreading device 44 Sliding mechanism (motion mechanism)
52a Small-diameter roller 54b Small-diameter roller 56 Fabric holding device D Fabric F Flow direction

Claims

A fabric spreading device,
A lower conveyor for conveying the dough from the upstream side to the downstream side;
An upper conveyor disposed above the lower conveyor,
The upper conveyor has a conveyor belt, the conveyor belt has an arcuate lower surface driven from the upstream side to the downstream side, and the center of curvature of the arcuate lower surface is higher than the conveyor belt. Located in
Furthermore, it has a movement mechanism which moves the said upper conveyor so that the press location of the cloth | dough by the said circular-arc-shaped lower surface may move from an upstream side to a downstream side, The cloth spreading apparatus characterized by the above-mentioned.
The lower conveyor includes a first lower conveyor and a second lower conveyor disposed downstream of the first lower conveyor, and the speed of the second lower conveyor is higher than the speed of the first lower conveyor. The dough spreading apparatus according to claim 1, wherein:
The dough spreading apparatus according to claim 1 or 2, wherein the upper conveyor is driven at the same speed or faster than the lower conveyor.
When the pressing point is above the first lower conveyor, the speed of the conveyor belt of the upper conveyor is equal to the speed of the first lower conveyor;
4. The dough spreading apparatus according to claim 3, wherein when the pressing location is above the second lower conveyor, the speed of the conveyor belt of the upper conveyor is equal to the speed of the second lower conveyor. .
The dough spreading apparatus according to claim 2, wherein the upper conveyor is driven at a speed higher than that of the first lower conveyor, and the second lower conveyor is driven at a speed higher than that of the upper conveyor.
The dough spreading apparatus according to claim 1, wherein the lower conveyor is a single conveyor.
The dough spreading apparatus according to claim 6, wherein the upper conveyor is driven at the same speed or faster than the lower conveyor.
The distance between the upper conveyor and the lower conveyor at the pressing portion is reduced when the pressing portion moves from the upstream side to the downstream side. Fabric spreading device.
When the pressing location moves from the upstream side to the downstream side, the distance between the reference line defined by the unloading direction of the lower conveyor and the upper conveyor at the pressing location is reduced and / or the reference line The dough extending apparatus according to claim 8, wherein a distance between the pressed portion and the lower conveyor is reduced.
The distance between the upper conveyor and the lower conveyor at the pressing location is constant when the pressing location moves from the upstream side to the downstream side. Fabric spreading device.
The dough extending apparatus according to any one of claims 1 to 10, further comprising a dough pressing roller disposed above the lower conveyor for pressing dough entering the upper conveyor.
The said upper conveyor has many small diameter rollers, The said many small diameter rollers support the said conveyor belt, It arrange | positions so that the said conveyor belt may have an arcuate lower surface. The fabric spreading device according to any one of 11 to 11.
The lower conveyor includes a conveyor belt supported by a plurality of small-diameter rollers, and the plurality of small-diameter rollers of the lower conveyor are arranged such that the conveyor belt of the lower conveyor has a linear upper surface. The fabric spreading device according to any one of claims 1 to 12.
The dough spreading apparatus according to any one of claims 1 to 13, wherein the movement mechanism is a swinging mechanism that swings the upper conveyor.
The dough spreading apparatus according to any one of claims 1 to 13, wherein the movement mechanism is a sliding mechanism for sliding the upper conveyor.