JP6990352B2 - Fan box in grain dryer - Google Patents

Description

The present invention relates to a grain dryer for drying rice and wheat immediately after harvesting, and more particularly to a fan box for mounting an exhaust fan.

Conventionally, in this type of grain dryer, an operation unit and a burner box are provided on the front side of the grain drying unit, and a suction type exhaust fan is provided on the back side of the grain drying unit. The hot air generated by the burner in the burner box is ventilated from the hot air chamber to the grain flowing intermittently, while the hot air ventilated through the grain is blown out of the machine by the exhaust fan through the exhaust chamber. Formed to evacuate. In addition, an elevator (bucket elevator) for returning the grain discharged from the grain drying section to the grain storage section and discharging the dried grain to the outside of the machine stands adjacent to the burner box. Established (see Patent Document 1).

As described above, when the elevator is provided on the front side of the grain dryer, the grain discharge direction from the elevator is, for example, the back side of the farm building due to the structure of the farm building in which the grain dryer is stored and installed. When it is limited to the side facing the entrance), the main body of the grain dryer is rotated on the spot so that the elevator is on the back side of the farm building, and the burner box and the operation unit are on the entrance side of the farm building. As described above, the burner box and the operation unit are recombined with the exhaust fan and the fan box (see 0019 and FIG. 3 of Patent Document 1). At that time, as shown in FIG. 8, in order to avoid a conflict between the exhaust fan and the elevator, the fan mounting opening 151 of the fan box 150 for mounting the exhaust fan is the fan box. The opening is offset from the center of 150 in the left-right direction (shifted to the right in FIG. 8).

Japanese Unexamined Patent Publication No. 2015-161495

The fan box 150 in FIG. 8 is a slightly oblong rectangular shape that communicates with both end portions of the pair of exhaust chambers in the grain drying portion, and is provided in close contact with the outer wall surface of the grain drying portion. Is hollow, but since it is equipped with a suction fan equipped with a motor, it needs to be configured more robustly than a member such as the grain drying portion. For example, in the fan box 150 , upper and lower plates 152 and 153 made of thick steel plates are combined with side plates 154 bent on both ends, and the side plates 154 are provided with a plurality of reinforcing members 155 . Welded together. Therefore, the weight of the fan box is large, and the labor required for the assembly work at the time of installing the grain dryer is large. In particular, it has been desired to facilitate the assembly of the fan box 150 in a large grain dryer.

In view of the above problems, an object of the present invention is to provide a fan box in a grain dryer that is robust and easy to assemble.

In order to achieve the above object, the invention of claim 1 is
A grain storage section is provided in the upper part, a grain drying section is provided in the lower portion, and a bucket elevator for circulating grains discharged from the grain drying section is provided in the grain drying section. The grain drying section is provided with the grain. A drying chamber for allowing hot air to pass through the grains flowing down from the storage portion is formed by a porous wall, and a hot air chamber for allowing hot air to pass through the drying chamber and an exhaust chamber for flowing the hot air that has passed through the drying chamber are formed. A hot air generator is provided at one end of the hot air chamber, and an exhaust fan is provided at the end of the exhaust chamber on the opposite side of the hot air generator. In a grain dryer mounted on an opening for mounting an exhaust fan provided in a rectangular fan box that communicates with the end of the chamber.
The fan box is composed of upper and lower plates and elevation plates in contact with edge portions of the upper and lower plates, and the elevation plate is a central elevation plate having an opening for mounting an exhaust fan. A right elevation plate including a right side surface formed by bending the right end portion at a substantially right angle, and a left elevation plate including a left side surface formed by bending the left end portion at a substantially right angle. The plate and the left elevation plate sandwich the central elevation plate and have different lateral lengths from each other .
Further, each of the upper, lower, left and right edge portions of each elevation plate is folded back to form a bent portion, and the left and right edge portions adjacent to each other of each elevation plate are bent. A flange portion including a portion is further formed, and each upper and lower end edge portion of each elevation plate, the upper and lower surface plates, and adjacent flange portions are combined with each other and wedged .

The opening for mounting the exhaust fan may be opened at a position eccentric from the center of the central elevation plate.

According to the fan box in the grain dryer of the present invention, since the fan box is divided into upper and lower plates, a right elevation plate, a left elevation plate and a central elevation plate, the assembly of the grain dryer is performed. In this case, the fan box can be easily carried in, and the weight of the entire fan box can be reduced because there is no reinforcing member.

Then, a bent portion is formed at the upper, lower, left, and right end edges of the elevation plate, and a flange portion including the bent portion is further formed at each of the left and right end edges adjacent to each other of the elevation plate. Since the upper and lower edge portions of each elevation plate, the upper and lower surface plates, and the adjacent flange portions are combined and wedged together, the steel plate is relatively thin without using a conventional reinforcing member. However, it became possible to maintain the strength.

According to the second aspect of the present invention, the wind exhaust direction can be changed in the vertical direction only by turning the central elevation plate upside down.

It is a side view of a grain dryer. It is the same vertical sectional view. It is a perspective view of the fan box in this embodiment. It is a perspective view which shows the state which each plate constituting the fan box is divided. It is an enlarged view which shows the cross section AA in FIG. It is an enlarged view which shows the cross section BB in FIG. It is an enlarged perspective view of the central elevation plate constituting the fan box. It is a perspective view which shows the conventional fan box.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The grain dryer 1 according to the embodiment of the present invention has a grain storage section 2 for storing grains at the upper part, and a grain drying section 3 having a hot air chamber 4, an exhaust air chamber, and a grain drying chamber 6 at the lower portion, respectively. It will be set up. An operation unit 7 and a burner box 8 are integrally provided on the front side of the grain dryer 1, and a bucket elevator 9 is erected adjacent to them (see FIG. 1).

Next, the grain drying unit 3 will be described with reference to FIG.
A pair of grain drying chambers 6 through which grains flowing down from the grain storage portion 2 pass are formed of a breathable porous wall member, and a space surrounded by these pair of grain drying chambers 6 is defined as a hot air chamber 4. The burner box 8 is arranged at one end of the hot air chamber 4. Inside the burner box 8, a hot air generator (not shown) using a kerosene type burner or the like is provided. Further, on each outside of the hot air chamber 4 of the pair of grain drying chambers 6, a pair of exhaust chambers 5 for collecting hot air that has passed through the grain drying chamber 6 from the hot air chamber 4 is formed. An exhaust port 14 is opened at each end of the pair of exhaust chambers 4 on the opposite side of the burner box 8, and the details are described later so as to cover the pair of exhaust ports 14 in a slightly oblong shape. A fan box 15 is provided. Further, a suction type exhaust fan 17 is mounted on the fan box 15, and the hot air generated by the hot air generator and the outside air are mixed by the drive of the exhaust fan 17, and the hot air is generated in the hot air chamber 4. After passing through the grain drying chamber 6 and flowing into the exhaust chamber 5, the exhaust fan 17 is configured to exhaust air to the outside of the machine via the exhaust port 14 and the fan box 15.

The pair of grain drying chambers 6 have a V-shaped cross section, and a common steering valve 10 driven by a motor (not shown) is laterally provided at each lower end of the grain drying chamber 6. A funnel-shaped grain collecting hopper 11 is provided below the dispensing valve 10, and the bottom of the grain collecting hopper 11 is driven by a motor 16 of the machine in order to discharge grains fed from the dispensing valve 10. The lower screw conveyor 12 is installed horizontally. Further, the bucket elevator 9 is erected by connecting to the transport end portion of the lower screw conveyor 12. An upper screw conveyor 22 connected to the discharge portion of the bucket elevator 9 is horizontally installed on the top plate portion of the grain storage portion 2. The elevator motor 9a that drives the upper screw conveyor 14 and the bucket elevator 9 is attached to the upper part of the bucket elevator 9. Further, a rotary dispersion board 13 for evenly charging the grain discharged from the upper screw conveyor 14 into the grain storage section 2 is provided so as to hang down from the top plate portion of the grain storage section 2. The rotary distribution board 13 can be interlocked with the upper screw conveyor 14 via a bevel gear or the like.

Next, the fan box 15 according to the embodiment of the present invention will be described with reference to FIGS. 3 to 6. 3 is a perspective view showing the entire fan box 15, FIG. 4 is a perspective view divided for each plate constituting the fan box 15 in FIG. 3, FIG. 5 is a sectional view taken along the line AA in FIG. 3, and FIG. 6 is the same. BB sectional view.
The fan box 15 has a slightly oblong, shallow-bottomed box shape, is hollow inside, and has an opening 18 for attaching an exhaust fan 17 at a substantially central portion of the front surface. As shown in FIG. 4, the fan box 15 is formed from an elongated upper surface plate 19 and a lower surface plate 20 and three elevation plates having upper and lower upper and lower surface plates 19 and 20 in contact with the upper and lower ends thereof. Become. The upper and lower plates 19 and 20 are formed with mounting flanges 19a and 20a having an L-shaped cross section when the fan box 15 is brought into contact with the grain drying portion 3, and the mounting flanges 19a of the top plate 19 have a plurality of mounting flanges 19a. A bolt hole 19b is provided. Further, wedge mounting holes 25 are provided at appropriate intervals on the opposite end edges of the mounting flanges 19a and 20a of the upper and lower plate plates 19 and 20.

The three elevation plates are the left elevation plate 21 on the left side facing the fan box 15, the right elevation plate 22 on the right side, and the central elevation plate 23 sandwiched between these three plates. The upper, lower, left and right edge portions of the elevation plates 21 to 23 are folded back to form a double-structured bent portion 24 (see FIGS. 5 and 6). Then, the left end portion of the left elevation plate 21 is further bent at a substantially right angle to form the left side surface 21a of the fan box 15, and the right end portion of the right elevation plate 22 is further bent at a substantially right angle to form the fan. It is the right side surface 22a of the box 15. The width of the left elevation plate 21 is formed to be about 200 mm larger than the width of the right elevation plate 22. This is to avoid a conflict between the exhaust fan and the elevator when the burner box and the operation unit are recombined with the exhaust fan and the fan box, as described above.

An opening 18 for mounting an exhaust fan is opened in the central elevation plate 23 provided between the left elevation plate 21 and the right elevation plate 22. This opening position is slightly downward from the central portion of the central elevation plate 23, and an embedded bolt 18a for mounting the exhaust fan 17 is provided at the peripheral edge of the exhaust fan mounting opening 18. There are multiple.

The upper and lower end edges of the elevation plates 21, 22 and 23 are formed into L-shaped flanges 21b, 22b and 23b by further bending the bent portions 24 inward at right angles, and these L-shaped flanges 21b. , 22b, 23b are provided with wedge wearing holes 25 at positions corresponding to a plurality of wedge wearing holes 25 provided at the end edges of the upper and lower plate plates 19, 20. Then, by further bending the right end edge portion of the left elevation plate 21 and the left end edge portion of the right elevation plate 22 at a right angle, the crank type flanges 21c and 22c are formed, respectively, and the crank type flanges 21c, respectively. Wedge wearing holes 25 are provided in 22c at appropriate intervals.

Groove-shaped flanges 23c having a wedge-shaped cross section are formed on the left and right edge portions of the central elevation plate 23 so as to further wrap the bent portion 24, and the left and right grooves 23c are formed on these groove-shaped flanges 23c. A wedge wearing hole 25 is provided at a position corresponding to the wedge wearing hole 25 provided in each of the crank type flanges 21c and 22c of the elevation plates 21 and 22.

When assembling the fan box 15 by combining the plates 19 to 23, as shown in FIG. 5, the crank type flange 21c of the left elevation plate 21 is attached to the back surface of the groove type flange 23c on the left side of the central elevation plate 23. The wedge holders 26 are inserted into the wedge mounting holes 25 from the outside of the fan box 15 by matching the wedge wearing holes 25 provided in the flanges 23c and 21c with each other so as to bring the front side surfaces into contact with each other. At 27, the flanges 21c and 23c are wedged together. The wedge holder 26 has a U-shaped cross section so that the wedge 27 can be inserted, and has a locking portion 26a at the end having a length larger than the length dimension of the wedge wearing hole 25, and the locking portion 26a has a locking portion 26a. It is locked to the peripheral edge of the wedge wearing hole 25. In this way, by wedge-bonding at the bottom of the grooved flange 23c of the central elevation plate 23, the wedge is housed inside the grooved flange 23c, and there is no unnecessary protrusion, resulting in a neat appearance. Become.

Next, the groove type flange 23c on the right side of the central elevation plate 23 and the crank type flange 22c of the right elevation plate 22 are combined, and both plates 23 and 22 are wedged together in the same manner as described above. Then, after the three elevation plates 21 to 23 are integrally wedged together, the L-shaped flanges 21b, 22b, 23b at the upper end edges of the elevation plates 21 to 23 are attached to the end edges of the upper surface plate 19. They are brought into contact with each other from above, and the wedge wearing holes 25 are matched with each other, and are wedged by the wedge holder 26 and the wedge 27. Similarly, an L-shaped flange (not shown) at the lower end edge of each of the elevation plates 21 to 23 is brought into contact with the end edge of the lower surface plate 20 from below and wedged.
The upper and lower plate plates 19 and 20 are fitted with the groove type flanges 23c on the left and right sides of the central elevation plate 23 and the crank type flanges 21c and 22c of the left and right elevation plates 21 and 2 combined with these. Two recesses 19c and 20c are provided.

When the fan box 15 integrally assembled by wedge-bonding the plates to each other as described above is attached to the back wall of the grain drying portion 3, the L-shaped mounting flange 20a of the lower surface plate 20 is attached. A bolt is inserted through a bolt hole 19b provided in the mounting flange 19a of the upper surface plate 19 while being locked to a locking portion (not shown) provided on the back wall, and an embedded nut provided on the back wall (shown). It is screwed by. Next, the exhaust fan 17 is screwed into the exhaust fan mounting opening 18 of the central elevation plate 23 by an embedded bolt 18a.

As described above, when the fan box 15 and the burner box 8 are exchanged or when the exhaust direction is to be shifted to the left or right, the fan box 15 is turned upside down and replaced. When it is desired to shift the exhaust air direction in the vertical direction, as shown in FIG. 7, the position can be easily adjusted by removing only the central elevation plate 23 and turning it upside down. Further, in the present embodiment, the opening for mounting the exhaust fan 18 is provided so as to be displaced downward from the center of the central elevation plate 23, but the central elevation plate 23 is square and the exhaust fan is attached. By arbitrarily eccentricizing the opening 18 from the center of the central elevation plate 23, the central elevation plate can be rotated by 90 ° to change the position of the ventilation fan mounting opening 18. can.

The fan box in the grain dryer of the present invention is useful because it facilitates the work at the time of assembly and rearrangement and also reduces the manufacturing cost.

1 Grain dryer 2 Grain storage 3 Grain drying section 4 Hot air chamber 5 Blowout chamber 6 Grain drying chamber 7 Operation unit 8 Burner box 9 Bucket elevator 9a Elevator motor 10 Steering valve 11 Grain collection hopper 12 Lower screw conveyor 13 rotation Dispersion board 14 Upper screw conveyor 15 Fan box 16 Machine motor 17 Blowout fan 18 Blowout fan mounting opening 18a Embedded bolt 19 Top plate 19a Mounting flange 19b Bolt hole 19c Recess 20 Bottom plate 20a Mounting flange 20c Recess 21 Left standing Face plate 21a Left side surface 21b L-shaped flange 21c Crank type flange 22 Right elevation plate 22a Right side surface 22b L-type flange 22c Crank type flange 23 Central elevation plate 23b L-type flange 23c Groove type flange 24 Folded part 25 Wedge mounting hole 26 Wedge holder 26a Locking part 27 Wedge

Claims (2)

A grain storage section is provided in the upper part, a grain drying section is provided in the lower portion, and a bucket elevator for circulating grains discharged from the grain drying section is provided in the grain drying section. The grain drying section is provided with the grain. A drying chamber for allowing hot air to pass through the grains flowing down from the storage portion is formed by a porous wall, and a hot air chamber for allowing hot air to pass through the drying chamber and an exhaust chamber for flowing the hot air that has passed through the drying chamber are formed. A hot air generator is provided at one end of the hot air chamber, and an exhaust fan is provided at the end of the exhaust chamber on the opposite side of the hot air generator. In a grain dryer mounted on an opening for mounting an exhaust fan provided in a rectangular fan box that communicates with the end of the chamber.
The fan box is composed of upper and lower plates and elevation plates in contact with edge portions of the upper and lower plates, and the elevation plate is a central elevation plate having an opening for mounting an exhaust fan. A right elevation plate including a right side surface formed by bending the right end portion at a substantially right angle, and a left elevation plate including a left side surface formed by bending the left end portion at a substantially right angle. The plate and the left elevation plate sandwich the central elevation plate and have different lateral lengths from each other .
Further, each of the upper, lower, left and right edge portions of each elevation plate is folded back to form a bent portion, and the left and right edge portions adjacent to each other of each elevation plate are bent. A grain dryer characterized in that a flange portion including a portion is further formed, and the upper and lower end edges of each elevation plate, the upper and lower surface plates, and the adjacent flange portions are combined with each other and wedged . Fan box. The fan box of the grain dryer according to claim 1, wherein the opening for mounting the exhaust fan is opened at a position eccentric from the center of the central elevation plate .

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