JP2020197334A - Ladder for inspecting grain dryer - Google Patents

Abstract

To provide a grain dryer comprising a burner box or a fan box, allowing a worker to easily use an inspection ladder.MEANS FOR SOLVING THE PROBLEM: The inspection ladder that can be leaned against an upper part of a grain storage tank, is characterized by being divided into an upper half of a fixed ladder and a lower half of a leaning ladder, with the fixed ladder made fixable to one of the front, back, left and right faces of the grain storage tank, engaging means each provided on a lower end of the fixed ladder and an upper end of the leaning ladder respectively to engage the lower end of the fixed ladder with the upper end of the leaning ladder, and engaging means each provided on each of the upper ends of the burner box and the fan box respectively, to engage with the engaging means provided on the upper end of the leaning ladder.SELECTED DRAWING: Figure 2

Description

The present invention relates to a grain dryer that dries grains such as rice and wheat by hot air while circulating in the machine body, and particularly relates to an inspection ladder in the grain dryer.

Conventionally, in this type of grain dryer, a ladder is provided for inspection of each part, particularly for inspection of high places. This ladder is formed to have a length that allows the top plate of the grain dryer to be inspected, but if the grain dryer is a large model, the height to the top plate is 5 m or more, and is used for inspection. Since the ladder is also so long, it is not easy to work and it is dangerous when the inspection ladder is replaced with the side surface, the front surface or the back surface of the grain dryer as needed. Further, since a burner box is provided on the front surface of the grain dryer main body, and a blower having an exhaust duct and a fan box to which the exhauster is attached are provided on the back surface, respectively, the front surface and the fan box to which the blower is attached are provided. It was difficult to lean the inspection ladder on the back.

By the way, the inspection ladder is divided into an upper half and a lower half, and the upper half is fixed to the side plate of the grain storage tank mounted on the main body of the grain dryer, while the lower half is not portable and can be moved. Patent Document 1 discloses a ladder in which half of the ladder is leaned against the lower end of the upper half of the ladder, but also in this case, the lower one is on the front surface with the burner box and the back surface with the fan box or the like. It was difficult to lean half the ladder.

Further, Patent Document 2 describes a step provided on the side surface of a grain dryer, the upper half ladder is fixedly provided on the step, and the lower half ladder is detachably attached to the step. ing. However, in this case, it is necessary to separately provide the step, and in order to lean the lower half ladder on the front surface and the back surface of the grain dryer, the step is projected from the burner box and the fan box. It must be provided and is not a viable choice for the grain dryer, which is often installed in relatively small farm workplaces.

Japanese Unexamined Patent Publication No. 2001-41656 Japanese Unexamined Patent Publication No. 9-53884

As described above, the conventional inspection ladder of the grain dryer is difficult to use on the front surface of the grain dryer with the burner box and the back surface of the fan box.
Therefore, an object of the present invention is to provide a grain dryer in which an inspection ladder can be easily used even on a surface provided with the burner box or a fan box.

In order to achieve the above object, in the present invention, a burner box for supplying hot air for drying to the hot air chamber is provided on the front surface of the dryer main body provided with a hot air chamber, an exhaust air chamber and a drying chamber inside. In order to provide a fan box equipped with a fan for sucking and discharging the exhaust air from the exhaust chamber, and to return the grain storage tank placed on the dryer main body and the grain discharged from the drying chamber to the grain storage tank. In the grain dryer, which is made up of a grain fryer
An inspection ladder that can be leaned against the upper part of the grain storage tank, and the inspection ladder is divided into an upper half fixed ladder and a lower half hanging ladder, and the fixed ladder is either front, back, left or right of the grain storage tank. While it can be fixed to the surface, locking means are provided at the lower end of the fixed ladder and the upper end of the hanging ladder so as to engage the lower end of the fixed ladder and the upper end of the hanging ladder, and further, the burner Each upper end of the box and the fan box is provided with a locking means that engages with the locking means at the upper end of the hanging ladder.

It is preferable that a step plate is provided at the upper end of the hanging ladder, and a locking means that engages with the locking means at the lower end of the fixed ladder is provided at the end of the step plate.

The end of the step plate can be bent downward to serve as a locking means.

The fixed ladder may be fixed to each flange of a plurality of tank plates forming the grain storage tank via fixing metal fittings.

According to the present invention, while the fixed ladder is fixed to any surface of the grain storage tank, the locking means at the lower end of the fixed ladder and the locking means at the upper end of the hanging ladder are engaged with each other to engage the fixed ladder and the hanging ladder. Since the upper ends of the burner box and the fan box are also provided with locking means for engaging with the locking means at the upper end of the hanging ladder, the inspection ladder could not be hung in the past. Inspection work with an inspection ladder is now possible even on the front and back of the grain dryer. Moreover, by leaning the hanging ladder against the upper end of the burner box or the fan box, these burner boxes or the fan box can be used as a relay scaffold, and the inspection work becomes safer.

Further, if the step plate is provided at the upper end of the hanging ladder, it is easy and safe to transfer from the inclined hanging ladder to the vertical fixed ladder.

Further, if the fixed ladder is fixed to the flange portions of a plurality of tank plates via the fixing metal fittings, the fixed ladder is supported by the strong flange portion, so that the inspection ladder is fixed without shaking. It is safe.

The whole perspective view when the fixed ladder is provided on the side surface in the grain dryer of this invention. The whole perspective view when the fixed ladder is provided in the front in the grain dryer of this invention. The whole perspective view of the grain dryer of this invention when the fixed ladder is provided on the back surface. An enlarged perspective view showing a fixed ladder and a hanging ladder of the present invention. A perspective view showing a fixed ladder and a hanging ladder of the present invention, and a part of the enlarged perspective view of FIG. 4 is further enlarged.

Hereinafter, embodiments of the inspection ladder of the grain dryer of the present invention will be described with reference to the drawings.

The grain dryer according to the embodiment of the present invention is a dryer main body having a grain storage tank for storing grains at the upper part and a ventilation drying section at the lower part for blowing hot air to the grains flowing down from the grain storage tank to dry them. It is a well-known one equipped with a grain frying machine for returning grains that have undergone a drying action in the dryer body to the grain tank.

The overall configuration of the grain dryer 1 according to the embodiment of the present invention will be described with reference to FIG. 1. The upper portion of the grain dryer 1 having a substantially rectangular appearance is a grain storage tank 2 for storing grains, and the lower portion thereof is dried. A pair of grain drying chambers (shown) formed in the machine main body 3 and arranged in the dryer main body 3 in a substantially V-shaped vertical cross section for ventilation drying of grains flowing down from the grain storage tank 2. Is provided over the longitudinal direction (front-back direction) of the dryer body. The pair of grain drying chambers are formed of a ventilable perforated wall steel plate having a large number of slits, and the inner space surrounded by the pair of grain drying chambers is formed in a hot air chamber (not shown), while the said. Each space outside the pair of grain drying chambers is formed in an exhaust chamber (not shown), and an exhaust port (not shown) is opened on one end side (rear side) in the longitudinal direction of each of the exhaust chambers. A fan box 4 that covers these exhaust ports is provided, and an exhaust fan 5 and a fan motor 6 including a suction fan are mounted on the fan box 4 (see FIG. 3).

A burner (not shown) for generating hot air is made to face one end of the front surface of the hot air chamber formed over the longitudinal direction of the dryer main body 3 on the side facing the exhaust fan 5. A burner box 7 for storing the above is provided.

Further, at the lower end confluence of the grain drying chamber having a V-shaped cross section, a pair of long and cylindrical rotary valves (not shown) for intermittently flowing the grains in the grain drying chamber are provided. It is installed horizontally over the entire length of the lower end of the grain drying chamber. The rotary valve is configured to rotate forward and reverse intermittently or continuously by a valve motor (not shown).

A hopper-shaped grain collecting plate (not shown) forming the bottom of the exhaust chamber is provided below the rotary valve, and grains discharged from the rotary valve are conveyed to the bottom of the hopper of the grain collecting plate. The lower screw conveyor 11 is horizontally provided, and the transfer end portion of the lower screw conveyor 11 is connected to the bucket type grain raising machine 8. The discharge portion of the upper part of the grain raising machine 8 is connected to the upper screw conveyor 9 horizontally provided on the top plate portion of the grain storage tank 2, and the grain conveyed to the transfer end portion of the upper screw conveyor 9 is the grain. A distribution board (not shown) to be put into the storage tank 2 is vertically installed from the top plate portion. The grain raising machine 8, the upper screw conveyor 9, and the motor 10 for the grain raising machine for driving the dispersion board are attached to the upper part of the grain raising machine 8, while the lower screw conveyor is attached to the bottom of the dryer main body 3. A motor for this machine (not shown) to be driven is arranged.

Next, the fixed ladder 12 will be described with reference to FIGS. 4 and 5. The fixed ladder 12 has a length substantially the same as the height dimension of the grain storage tank 2, and includes a pair of vertical xylem portions 121 and a large number of horizontal xylem portions 122. The crossbar portion 122 is formed of a round bar-shaped steel material, and the lowermost crossbar portion 124 is made of a steel material having a U-shaped cross section, and the horizontal plane 124a thereof includes a locking means 133b at the upper end of the hanging ladder 13 described later. An engaging notch 124b is formed to serve as a locking means.

The fixed ladder 12 is fixed to the side surface of the grain storage tank 2 by a plurality of mounting metal fittings 123. That is, both ends of the mounting bracket 123 having both ends bent in a divergent shape are bolted to the pair of vertical wood portions 121, and the central portion of the mounting bracket 123 is a tank forming the grain storage tank 2. It is fixed to the flange portion 202 of the plate 201 by screwing with bolts and nuts.
In the case of the large grain dryer 1, the pair of vertical wood portions 121 may be provided with a plurality of safety baskets 126 so as to face the mounting bracket 123.

On the other hand, the hanging ladder 13 has a length slightly larger than the height dimension of the dryer main body 3, and like the vertical tree portion 121 and the crossbar portion 122 of the fixed ladder 12, a pair of vertical wood portions 131 and a plurality of crossbars. It consists of a part 132. A step plate 133 is provided at the upper end of the hanging ladder 13. The step plate 133 is formed, for example, by bending the peripheral edge of one steel plate downward, and fixing the folded curved surfaces 133a on both sides of the step plate 133 and the upper end portion of the pair of vertical wood portions 131 with bolts or the like, and the step plate 133 thereof. The bent portion 133b at the end serves as a locking means. The bent portion 133b is formed by being bent downward so as to be fitted into and engaged with the notch portion 124b which is a locking means formed in the crossbar portion 124 at the lowermost stage of the fixed ladder 12.
When the notch portion 124b is not provided, the horizontal plane of the lowermost crossbar portion 124 which is the locking means of the partner for engaging the width of the bent portion 133b which is the locking means for the end portion of the step plate 133. By setting the length to be substantially the same as the length of 124a, the locking means will not be displaced from each other. Further, the bent portion 133b, which is a locking means for the end portion of the step plate 133, is not only bent downward, but is further bent back to form a hook shape, so that the tip portion thereof is fixed. It is inserted into a cross section 124 having a U-shaped cross section, which is a locking means at the lower end of the ladder 12, and exerts a stronger engaging effect.
In addition, the lower end portions of the pair of vertical wood portions 131 may be covered with a non-slip rubber material 134.

FIG. 2 shows a case where the fixed ladder 12 is fixed to the grain storage tank 2 in front of the grain dryer 1. The fixed ladder 12 is bolted to the flange portion 202 of the tank plate 201 via the mounting bracket 123, as in the case of fixing to the grain storage tank 2 on the side surface of the grain dryer 1 shown in FIG. Since the grain raising machine 8 is erected in the vicinity of the burner box 7 on one side of the front surface of the grain dryer, the fixed ladder 12 is fixed on the other side of the front surface of the grain dryer 1. ..

A groove 701 made of a steel material having a U-shaped cross section or the like is formed on the upper peripheral peripheral portion of the burner box 7 to serve as a locking means. As described above, at the upper end of the hanging ladder 13, a locking portion including a bent portion 133b obtained by bending the end portion of the step plate 133 is provided, and the bent portion 133b and the groove portion 701 are engaged with each other. The hanging ladder 13 is leaned against the upper end of the burner box 7 so as to fit each other. The upper surface of the burner box 7 can be used as a scaffold by being reinforced as needed. The groove portion 701 is formed to have a U-shaped cross section, but the groove portion 701 is not limited to the U-shaped cross section as long as it is securely engaged with the locking means at the upper end of the hanging ladder 13.

FIG. 3 shows a case where the fixed ladder 12 is fixed to the grain storage tank 2 on the back surface of the grain dryer 1. The fixed ladder 12 is bolted to the flange portion 202 of the tank plate 201 via the mounting bracket 123, as in the case where the fixed ladder 12 is fixed to the grain storage tank 2 on the side surface of the grain dryer 1 shown in FIG. Since the fan box 4 is mounted substantially in the center of the back surface of the grain dryer, the fixed ladder 12 may be fixed to either side of the back surface of the grain dryer 1. A groove 401 similar to the groove 701 of the burner box 7 is formed on the upper end edge of the fan box 4 to serve as a locking means, and the groove 401 and the plate 133 end of the hanging ladder 13 are locked. The hanging ladder 13 is leaned against the upper end of the fan box 4 so as to engage with the bent portion 133b.
In the case of this embodiment, since the grain dryer 1 is a small model and the machine height is relatively low, the fixed ladder 12 is not provided with the back basket 126.

The inspection ladder of the grain dryer of the present invention is provided on any surface according to the installation location of the grain dryer, which is determined by restrictions such as the size / entrance of the work place, the ventilation direction, and the filling / discharging direction of the grain. Correspondingly, it is possible to lean the hanging ladder even on the front side equipped with a burner box and the back side equipped with a fan box, not to mention both sides, which is extremely useful.

1 Grain dryer 2 Grain storage tank 201 Tank plate 202 Flange part 3 Dryer body 4 Fan box 401 Groove part (locking means)
5 Blower 6 Fan motor 7 Burner box 701 Groove (locking means)
8 Grain raising machine 9 Upper screw conveyor 10 Upper screw conveyor 10 Lower screw conveyor 12 Fixed ladder 121 Vertical xylem 122 Cross xylem 123 Mounting bracket 124 Cross xylem (bottom)
124a Horizontal plane 124b Notch (locking means)
13 Hanging ladder 131 Vertical xylem 132 Cross xylem 133 Step plate 133a Folded curved surface 133b Folded part (locking means)

Claims (4)

A burner box for supplying hot air for drying to the hot air chamber is provided on the front surface of the dryer main body having a hot air chamber, an exhaust chamber and a drying chamber inside, and exhaust air from the exhaust chamber is sucked and discharged on the back surface. A grain storage tank for mounting a fan and a grain frying machine for returning grains discharged from the drying chamber to the grain storage tank are provided. In the dryer
An inspection ladder that can be leaned against the upper part of the grain storage tank, and the inspection ladder is divided into an upper half fixed ladder and a lower half hanging ladder, and the fixed ladder is either front, back, left or right of the grain storage tank. While it can be fixed to the surface, locking means are provided at the lower end of the fixed ladder and the upper end of the hanging ladder so as to engage the lower end of the fixed ladder and the upper end of the hanging ladder, and further, the burner An inspection ladder in a grain dryer, characterized in that each upper end of the box and the fan box is provided with a locking means that engages with the locking means at the upper end of the hanging ladder. An inspection ladder in a grain dryer according to claim 1, wherein a step plate is provided at the upper end of the hanging ladder, and a locking means for engaging with the locking means at the lower end of the fixed ladder is provided at the end of the step plate. .. The inspection ladder in the grain dryer according to claim 2, wherein the end portion of the step plate is bent downward to serve as a locking means. The inspection ladder in the grain dryer according to any one of claims 1 to 3, wherein the fixed ladder is fixed to a flange portion of each of a plurality of tank plates forming the grain storage tank via a fixing metal fitting.

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