JP3038366B2 - Powder storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular material storage container, and more particularly, to a method for efficiently storing powder such as cement and discharging the powder when needed, and for transporting the powder to another container. The present invention relates to a relatively small granular material storage container that can be easily installed in a place.

[0002]

2. Description of the Related Art In general, powder such as cement is stored in a tank which is a vertically long cylindrical container, and is used by taking out a predetermined amount from an outlet formed at the bottom as needed. . In such a cement storage tank, an outlet is basically formed at the center, and a funnel-shaped or conical bottom plate tapered toward the outlet is integrally assembled to the lower end of the vertically long cylindrical body. It was constituted by closing the lower end of the cylindrical body.

[0003] Since the bottom plate having the outlet formed in the center as described above is formed in a conical shape tapered toward the outlet, the bottom plate is usually called a "cone portion". I have. In such a cement storage tank, when the cement stored in the inside is taken out when necessary, it is necessary to smoothly flow out from the outlet (discharge port) of the cone portion by gravity flow due to its own weight. for that reason,
In the conventional cement storage tank, the angle of inclination of the cone with respect to the horizontal line is set to about 60 degrees.

[0004]

As described above, in the conventional cement storage tank, the method of removing the stored cement is based on natural outflow using the inclination angle (60 degrees) of the cone portion. However, there is a problem that the height of the cone portion is increased.

That is, when the total height and the diameter of the cement storage tank are constant, if the height of the cone portion is high, the volume of the cone portion itself becomes small, and the substantial storage portion is located above the upper end of the cone portion. The height of the elongated cylinder is also reduced, and the storage volume is reduced.

[0006] Conventionally, when designing a cement storage tank, the priority is given to the fact that the cement stored inside is smoothly flown out of the outlet of the cone portion by gravity under its own weight when required, so that the cement storage amount is reduced. Even so, the angle of inclination of the cone portion was set to be about 60 degrees.

[0007] Therefore, it has been desired to develop a cement storage tank in which the inclination angle of a bottom plate called a cone portion is reduced so that the cement can flow down to a take-out port reliably. By the way, as described above, a conventional cement storage tank that is configured by integrally assembling a funnel-shaped bottom plate tapered toward an outlet to a lower end of a vertically long cylindrical body and closing the lower end of the cylindrical body is Rather, they were stationary or fixed large powder storage tanks.

Therefore, when a cement storage tank having such a structure is installed in a mountainous area such as a dam construction site, for example, since the width of a material carrying road or the like is narrow, it is disassembled and transported to the site. The work of assembling was necessary. However, there are cases in which not much cement is used even at a site where the road width is narrow, such as a material loading road. Even in such a case, it is necessary to disassemble the large-sized powder storage tank described above, carry it to the site and reassemble it, which requires much labor and labor, and an improvement thereof has been desired.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems. Even if the inclination angle of the bottom plate is small, the flow of powder can be made smooth, and by adopting this technique, the whole is achieved. It is an object of the present invention to provide a powdery and granular storage container which can be reduced in size and can be transported even by a medium-sized truck.

Further, it is an object of the present invention to receive a small amount of powdery material such as cement contained in a packaging bag made of a flexible sheet together with the packaging bag and store the content of the powdery granule, Another object of the present invention is to provide a powdery / granular material storage container capable of smoothly supplying the container.

[0011]

According to the present invention, there is provided a bottom plate having a relatively gentle slope at one end and a peripheral wall standing upright from an outer peripheral portion of the bottom plate. A granular material storage container including a first container main body capable of storing a body, provided at one end and the other end thereof to support the first container main body such that a bottom plate is inclined downward to one end. At least the other end is formed so that the first container body can be temporarily placed with the bottom plate parallel to the horizontal plane so that the first container body can be temporarily placed, and a breathable sheet is provided on the surface of the bottom plate. Is spread, and air is blown out from at least one air outlet provided between the bottom plate and the air permeable sheet to pass through the air permeable sheet, so that the particles on the air permeable sheet are removed from the first container body. Down to the powder outlet at one end And wherein the door.

Further, in the granular material storage container according to the present invention, the second container main body for storing a small amount of material comprising a relatively gently inclined bottom plate and a peripheral wall standing upright from the outer peripheral portion of the bottom plate is provided in the first container main body. Attached to one end side of the container body, a breathable sheet is also spread on the surface of the bottom plate of the second container body, and further housed in a packaging bag made of a flexible sheet inside the second container body. An automatic cutting device is provided which cuts the packaging bag and takes out the internal powder and granular material into the second container main body when the collected powder and granular material is put into the second container main body together with the bag. Air is blown out from at least one air outlet provided between the bottom plate of the container body and the air permeable sheet to pass through the air permeable sheet, so that the powdery material on the air permeable sheet is removed from the first container body and the first container body. To the granular material outlet installed between the container body And characterized in that please.

Further, in the powdery and granular material storage container according to the present invention, in addition to any one of the above-mentioned features, a bowl having an air outlet formed on its periphery is covered so as to cover the air outlet formed on the bottom plate. Such a cap is disposed on the bottom plate.

[0014]

[0015]

In the granular material storage container according to the present invention, it is preferable that the breathable sheet is formed of a woven fabric formed by weaving tetron fibers. Furthermore, the inclination angle of each bottom plate in the first container body and the second container body is
Preferably, it is about 30 degrees with respect to the horizontal plane. Cement is suitable as the powder stored in the powder storage container.

According to the granular material storage container of the present invention having such features, the first container comprising the bottom plate which is relatively gradually inclined downward at one end side and the peripheral wall which stands upright from the outer peripheral portion of the bottom plate. Even if it is constituted by the main body, the powder stored in the powder storage container is supplied with air from at least one air outlet provided between the bottom plate and the air permeable sheet laid on the surface thereof. Is blown through the air permeable sheet to allow the powder on the air permeable sheet to flow down very smoothly to the powder outlet provided at one end of the container body and to be taken out.

That is, if the bottom plate of the container main body is loosened in order to reduce the size of the granular material storage container, when the powder stored in the container main body is taken out from the outlet, gravity flow occurs due to its own weight. Hateful. Therefore, when removing the powder, air is pressure-fed between the bottom plate and the air permeable sheet laid thereon. Then, air passes through the air-permeable sheet and enters the granular material thereon, and rises in the granular material toward the upper portion of the granular material storage container.

Due to the continuous incorporation of air into the powder and the upward movement of the container, each particle of the powder becomes a floating state and its fluidity is increased. Flows toward the outlet along the slope of the bottom plate. When stopping the removal of the granular material, stopping the supply of air between the bottom plate and the air permeable sheet laid thereon stops the floating state of the particulate material as described above, and as a result, The fluidity of the granular material almost disappears, and the flow of the granular material to the outlet is stopped.

As described above, in the granular material storage container of the present invention, the granular material in the first container body is made to be in a so-called floating state by air to enhance fluidity, and the outlet is provided along the inclination of the bottom plate. Since it is made to flow toward the first container body, since the outer shell structure of the first container main body can be mainly constituted by a bottom plate which is relatively gradually inclined downward on one end side and a peripheral wall which stands up from the outer periphery thereof, It is possible to reduce the size so that the powder or granules in an amount of 20 tons or less can be stored.

In such a granular material storage container, the granular material storage container is provided with an extensible leg (support) so that a stable loading on a truck bed or the like is enabled. Therefore, it can be transported as it is on a medium-sized truck without disassembly, and can be easily installed and used immediately on a narrow road such as a mountainous area.

Further, in the granular material storage container of the present invention, a second container main body for storing a small amount is attached to one end of the first container main body. Into the second container body, a bag in which about 1 ton of powder or granular material is wrapped with a flexible sheet is directly charged. Since the automatic cutting device is provided in the second container body, the flexible sheet is automatically cut by the automatic cutting device, and the granular material is discharged from the packaging bag into the second container body. Is done.

The second container body also has a relatively gently inclined bottom plate, on which a breathable sheet is laid, and air is blown out from between the sheet and the bottom plate to float the powder. Since it is in a state so as to enhance the fluidity, it flows very smoothly on the bottom plate, more precisely on the breathable sheet, toward the outlet located in the downward direction of the bottom plate.

The bottom plate of the second container body is inclined downward in a direction exactly opposite to the inclination direction of the bottom plate of the first container body, that is, toward one end of the first container body, and the powder material outlet is provided with the second container body. It is provided at one end of the first container main body so as to be sandwiched between the first container main body and the second container main body. Used commonly.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the embodiment shown in the drawings of the granular material storage container of the present invention will be described in more detail.
FIG. 1 is a front view showing a granular material storage container 1 according to one embodiment of the present invention, FIG. 2 is a plan view showing the granular material storage container 1, and FIGS. FIG. 2 is a schematic cross-sectional view showing a main part of the storage container 1 in an enlarged manner.

The granular material storage container 1 according to this embodiment is
Since it is for storing cement, the granular material storage container of this embodiment is hereinafter referred to as “cement storage container”. The cement storage container 1 includes a first container main body 10 and a second container main body 30 formed adjacent to each other.

The first container body 10 has a substantially rectangular shape as viewed from the top as shown in FIG. 2, and its main components are a bottom plate 11 inclined downward to one end (left side in FIG. 1) and A relatively large-capacity storage container which is composed of a peripheral wall 12 erected from the outer peripheral portion of the bottom plate 11 and is capable of storing a maximum amount of about 20 tons of cement.

FIG. 4 is a cross-sectional view of the first container body 10 cut along the width direction, where the inclined direction is the longitudinal direction, and the first container body 10 shown in FIG. As is clear from FIG. 5, which shows a partially enlarged bottom portion of the base 10, the base 10 is formed in a trough shape curved in the width direction. Such a bottom plate 11 is formed of a relatively thin iron plate.

The bottom plate 11 has two areas (A
Area and area B), each of which has one opening, and these openings are used as air outlets. On the surface of the bottom plate 11, a breathable sheet, that is, a canvas 13, is laid as clearly shown in FIGS.

The canvas 13 is not particularly limited as long as it is a material which does not easily cause clogging with cement and has good air permeability. It has become clear that a woven fabric formed by weaving, for example, tetron fibers can be used quite satisfactorily as such a material.

The first container body 10 having a rectangular shape when viewed from the top is provided with a total of the first container body 10 provided on both sides of one end and the other end thereof, as is mainly apparent from FIGS. 1, 3 and 7. It is supported on an installation surface such as the ground by four supports, specifically, legs 14 and 15. Each of these legs 1
The lengths 4 and 15 are designed such that when the first container body 10 is installed, the bottom plate 11 is inclined downward to one end at an angle of about 30 degrees with respect to the horizontal plane.

That is, the two legs 15 attached to both sides of the other end of the first container body 10 are connected to the bottom plate 1.
The length from 1 to the installation surface is naturally designed to be longer than that of the two legs 14 attached to both sides at one end. These legs 14 and 15 are connected to the hollow prism 14 fixed to the side surface of the first container body 10.
It has a nested structure in which solid prismatic bodies 14b, 15b are inserted into a, 15a and slidable.

The first reason for making the legs 14 and 15 extendable is that the bottom plate 11 of the first container main body 10 can be positioned with respect to a horizontal plane even if the installation surface is uneven when the cement storage container 1 is installed. The reason for this is that the inclination angle can be adjusted to be almost exactly 30 degrees, and that the cement storage container 1 can be stably loaded on the truck bed during transportation. In particular, the reason why the legs are expanded and contracted for transporting the cement storage container 1 will be described in further detail.

In order to transport the cement storage container 1, it is important that the two legs 15 attached to both sides at the other end are configured to be extendable and contractible. This is because when the cement storage container 1 is loaded on a carrier such as a truck and transported to the use site, the solid prismatic body 15b constituting the leg 15 is stored in the hollow prismatic body 15a. As shown in FIG. 6, the lower surface of the inclined bottom plate 11 can be temporarily placed so as to lie on a substantially flat surface such as the bed of the truck T.

However, in this cement storage container 1, the bottom plate 1
1 is not directly exposed to the outside, but the bottom plate 11
On the lower side, a supporting steel 16 configured as a frame portion of the first container body 10 is provided. Therefore, specifically, similarly to the bottom plate 11, the entire supporting steel 16 which is arranged at an angle of about 30 degrees with respect to the horizontal plane and supports the bottom plate 11 can be loaded so as to be placed on the bed of the truck T. As a result, the entire cement storage container 1 can be easily and safely transported to the destination.

Next, a structure for causing the cement stored in the first container body 10 to flow downward on the inclined bottom plate 11 will be described. Although it has already been described that the canvas 13 is laid on the entire surface of the inclined bottom plate 11, the laying method is shown in FIGS. 5, 7 and 8.
As shown in (1), the periphery of the canvas 13 is positioned on the mounting plate 17 provided on the inner surface of the side wall of the first container body 10, and the pressing band 1 made of a band iron plate is placed thereon.
8 and is firmly fixed by bolts 19.

As shown in FIG. 7, the canvas 13 laid on the entire surface of the bottom plate 11 is made of a strip-shaped iron plate so as to partition the surface into an area A in the lower half and an area B in the upper half. Another band-like plate 20 for holding is placed on the canvas, and both ends thereof are fixed to the mounting plate 17 and the intermediate portion is fixed to the bottom plate 11 by bolts.

The reason why the canvas 13 laid on the inclined bottom plate 11 is divided into two sections is that when the amount of cement in the first container body 10 decreases during supply, the inclined bottom plate 11 This is because the floating down of the cement in the region B on the high position side can be stopped.

In each of the regions A and B, openings are formed in the bottom plate 11 as described above, and one end of an air supply pipe 21 is fitted into each of these openings to form an air outlet, and the other end of the air supply pipe 21 is provided. Is connected to the air supply side of the blower 8 installed on the upper part of the first container body 10. Each of these air outlets is covered with a cap 22 having a bowl-like shape so that the air-permeable sheet 13 is not directly covered.

As shown in FIGS. 9 and 10, the cap 22 has semicircular notches 22a formed at four places on the peripheral edge thereof in contact with the surface of the bottom plate 11. The air blown into the inside is blown out in four directions along the surface of the bottom plate 11 from these four notches 22a. Therefore, the cap 22
Each of the notches 22a formed as described above functions as an air distribution outlet.

The first container main body 10 further includes:
An opening for discharging cement is formed at the lower end of the peripheral wall located on the side of the bottom plate 11 in the downward inclination direction. On the other hand, on the outer surface of the peripheral wall, a box-shaped take-out path 2 is provided along the peripheral wall,
It is attached so that the opening formed at the end thereof is aligned with the opening of the peripheral wall 12. A matching portion between these two openings forms a cement outlet 23.

In the vicinity of an intermediate portion in the width direction of the take-out path 2, a draw-out screw conveyor device 3 for drawing out cement is arranged so as to pass across the lower half of the take-out path 2. The cylindrical casing 3 a constituting the opening 3 opens at a portion crossing the take-out path 2 and communicates with the inside of the take-out path 2.

A screw 3b for a conveyor is rotatably disposed inside the casing 3a. A vertical screw conveyor device 4 is further disposed at an end of the drawing screw conveyor device 3 in the feed direction, and ends of the casings of the screw conveyor devices 3 and 4 communicate with each other. The end of the vertical screw conveyor device 4 in the feed direction is connected to the screw conveyor device 5 disposed further obliquely and the casings.

As shown in FIG. 2, the end of the screw conveyor device 5 arranged at an angle in the feed direction is positioned on the cement metering device 6 installed on the upper part of the first container body 10. As a result, the cement fed by the drawing screw conveyor device 3 is conveyed to the cement metering device 6 by the vertical screw conveyor device 4 and the screw conveyor device 5 arranged diagonally.

Therefore, the cement stored in the first container body 10 enters the casing 3a of the screw-out screw conveyor device 3 from the cement outlet 23 via the outlet channel 2 and is rotated by the rotating screw 3b. After being transported to the end, it is subsequently transported into the casing of the vertical screw conveyor device 4 and continuously transported to a predetermined take-out location by an internal screw.

Next, the second container body 30 installed adjacent to the first container body 10 will be described. The second container body 30 is installed on one end side of the first container body 10. Therefore, the above-mentioned drawer screw conveyor device 3 for drawing out cement is provided so as to be sandwiched between the first container body 10 and the second container body 30.

As shown in FIGS. 1, 3 and 11, the second container main body 30 is mainly composed of a bottom 31 and a peripheral wall 32 erected from the outer peripheral upper edge of the bottom 31.
The upper part is open. The bottom portion 31 has a trapezoidal bottom plate 31a as viewed in a plane inclined downward by about 30 degrees in a direction facing the first container body 10, and a side plate 31b provided diagonally from both opposing edges of the bottom plate 31a. It is formed in a substantially square gutter shape.

The bottom 31 of the first container body 30
Is formed with an opening serving as an air outlet similarly to the first container body 10, and one end of an air supply pipe 33 is fitted and attached to this opening.
The other end of the air supply pipe 33 is connected to the air supply side of the blower 8 described above.

The first container body 10 is connected to the air outlet.
A cap 34 having exactly the same shape as that used in the above is disposed, and a breathable sheet or canvas 35 is laid on the surface of the bottom 31, ie, the bottom plate 31a and the oblique side plate 31b so as to cover the cap 34.

The second container body 30 is formed in such a size that the packaging bag B containing about 1 ton of cement can be put into the inside from the upper open portion as shown in FIG. . Such a packaging bag B is formed of a flexible sheet made of a synthetic resin, and when a small amount of cement is used, a cement distributor or the like has conventionally used it as a small-capacity packaging bag.

Inside the second container body 30, there is provided an automatic cutting device 36 for automatically breaking the above-mentioned packaging bag B and taking out the content cement. The automatic cutting device 36 is attached to the rotating shaft 37 erected substantially at the center position inside the second container main body 30 and to the rotating shaft 37 so as to be located near the upper portion of the bottom portion 31. Rotating arm 3 extending in a direction perpendicular to the axis
8 and the cutting blades 3 attached to both ends of the rotating arm 38
9.

The rotary shaft 37 penetrates through a sealing member or the like provided on the bottom plate 31a and is connected to a drive shaft of a hypoid motor 40 provided below the rotary shaft 37, whereby the motor can be rotated by the operation of the motor 40. Have been. As shown in FIG. 12, the cutting blade 39 is attached to both ends of the cutting blade 39 by holding means 41 with its sharp end directed upward and its cutting edge directed in the rotation direction of the rotary arm 38.

The holding means 41 comprises a holding member 41a which is attached to the end surface of the rotating arm 38 so as to be able to adjust the amount of projection of the cutting edge of the cutting blade 39 projecting from the rotating arm 38. The cutting blade 39 is inserted into a gap between the inside of the member 41a and the end face of the rotating arm, and the holding member 41a is held by being tightened with a nut or the like and pressed against the end face of the rotating arm.

The upper end of the rotating shaft 37 to which the rotating arm 38 is attached is located in a space surrounded by the peripheral wall 32 of the second container body 30 as shown in FIG. A pedestal 42 that supports the center of the bottom of the packaging bag B placed in the container body 30 is attached.

By the way, the bottom portion 31 of the second container body 30 is provided with an opening for discharging cement on the side of the bottom plate 31a in the downward inclined direction, and this opening is provided at the other end side of the box-shaped take-out path 2 described above. The opening is aligned with the opening, and the aligned portion of the two openings is a cement outlet 43. In other words, the openings at both ends of the box-shaped take-out path 2 are aligned with the openings for discharging the cement of the container bodies 10 and 30, respectively.

A butterfly damper device 44 is provided in the box-shaped take-out path 2 as shown in FIG.
The butterfly damper device 44 includes a fulcrum shaft 45 rotatably supported at a substantially middle portion in the width direction in the take-out path 2. The fulcrum shaft 45 has one end of each of two dampers (opening / closing plates) 44 a and 44 b. Are attached so as to form a C-shape as a whole.

Each of the dampers 44a and 44b is connected to each of the cement outlets 2 in the container bodies 10 and 30 described above.
13 and 43, one of the dampers 44a is located at a position that allows or blocks the flow of the cement flowing out of the first container body 3, respectively, as shown in FIG. When opened to allow the outflow of cement from the cement outlet 23 at 10, the other damper 44 b is in such a relationship as to block the outflow of cement from the cement outlet 43 in the second container body 30. Have been.

That is, one end of a lever 46 is connected to the fulcrum shaft 45, and the other end of the lever 46 is connected to the fulcrum shaft 45.
Is connected to the end of the piston rod of the pneumatic piston device 47 so as to be rotatable in a direction in which can be rotated. Accordingly, when the other end of the lever 46 is rotated by reciprocating the piston rod by the pneumatic piston device 47, the fulcrum shaft 45 is rotated accordingly, whereby the two dampers 44a and 44b are integrally formed at a predetermined angle. Rotate by a range.

For example, as described above, in FIG. 13, one damper 44a flows from the cement outlet 23 of the first container body 10 into the casing 3a of the draw-out screw conveyor device 3 through the take-out path 2 through the take-out path 2. When in the shut-off position, the other damper 44b is in a position that allows it to flow from the cement outlet 43 in the second container body 30 via the outlet channel 2 into the draw screw conveyor device 3.

From such a state, the pneumatic piston device 4
7, the one damper 44a is connected to the cement outlet 23 of the first container body 10 as shown in FIG.
And the other damper 44b is also rotated from the cement outlet 43 of the second container body 30 to the position of opening the passage of the take-out path 2 leading into the casing 3a of the draw-out screw conveyor device 3 from the casing of the draw-out screw conveyor device 3. It turns to the position where the passage of the take-out path 2 reaching the inside 3b is blocked.

As a result, by operating the pneumatic piston device 47, the cement stored in the first container body 10 is transferred to the cement metering device 6 or stored in the second container body 30. It is possible to easily select the transportation of the existing cement to the cement measuring device 6 or the like.

Next, a method of using the cement storage container 1 in this embodiment will be described. In this cement storage container 1, when a considerable amount of cement is scheduled to be used, about 20 tons of cement is transported by a tank truck TR as shown in FIG.
It is stored in the first container body 10 by the above method.

When the cement stored in the first container body 10 is used, the butterfly damper device 44 is moved by the pneumatic piston device 47 so that one of the dampers 44 is used.
is rotated to a horizontal state, and the passage of the take-out path 2 from the cement take-out port 23 in the first container body 10 to the inside of the casing 3a of the draw-out screw conveyor device 3 is opened.

However, in this state, the first container body 10
When the cement stored in the container is taken out from the cement take-out port 23, since the bottom plate 11 constituting the first container body 10 is formed at an inclination angle of 30 degrees with respect to the horizontal line, gravity flow due to its own weight occurs. Hateful. Therefore, when removing the cement, air is pressure-fed between the bottom plate 11 and the canvas 13 laid thereon.

That is, the air blown out by the blower 8 installed on the upper part of the first container body 10 is blown into the cap 22 from each air outlet of the bottom plate 11 through the air pipe 21. The air blown out to the cap 22 blows out from the four notches 22 a in all directions in the gap between the canvas 13 and the bottom plate 11. The air uniformly blown to the lower side of the canvas 13 in this way ventilates almost the entire surface of the canvas 13, enters the cement thereon, and flows through the cement toward the upper part of the first container body 10. Rise.

As a result of the continuous mixing of air into the cement and the upward movement of the cement, the particles of the cement are in a floating state and the fluidity thereof is increased. As a result, the cement on the canvas 13 is It flows toward the cement outlet 23 along the slope of the bottom plate 11. When the removal of the cement is stopped, when the supply of air between the bottom plate 11 and the canvas 13 laid thereon is stopped, the suspended state of the cement particles as described above is eliminated, and as a result, the fluidity of the cement is reduced. Disappears, and the flow of cement to the cement outlet 23 stops.

When the cement stored in the first container body 10 has been used up in this way, it may happen that several tons of cement are still required. In such a case, even if only a few tons of cement are purchased, the cement dealer does not carry it with a tank truck TR or the like because the amount is small. Generally, in such a case, a required number of packaging bags B each packed with cement in units of 1 ton are loaded on a truck or the like and carried.

In such a case, it is very difficult to transfer the cement from the packaging bag B into the first container body 10 due to the labor and environmental problems caused by the scattering of the cement. Therefore, in the cement storage container 1, the packaging bag B is directly suspended from the open upper part in the second container main body 30 by using a small crane or the like mounted on a truck. Then, the openable / closable lid 50 is covered on the container body 30.

The packaging bag B lowered into the second container body 30 is supported on a base 42 attached near the upper end of the rotating shaft 37 with its center at the bottom. At that time, the bottom of the packaging bag B comes into contact with two cutting blades 39 held upward at both ends of the rotating arm 38 attached to the rotating shaft 37, and the tip of the cutting blade 39 is Pierce the bottom of the.

Next, when the hypoid motor 40 is driven and the rotary arm 38 is rotated by the rotation of the rotary shaft 37, the two cutting blades 39 rotate about the rotary shaft 37, so that the packaging bag B Cut the bottom circularly. Since the cutting blades 39 are provided at both ends of the rotary arm 38 which is linear in the radial direction passing through the rotary shaft 37, the bottom of the packaging bag B is cut open in a completely circular state only by rotating the rotary arm 38 by 180 degrees. It is.

As a result, the cement in the packaging bag B is
It is dropped into the bottom 31 of the second container body 30. In this case, dust is generated in the container body 30, and the dust is sucked into the container body 1 through the dust collection tube 51 by the back filter 52. When the cement stored in the second container body 30 is taken out in this manner, the bottom portion 31 including the inclined bottom plate 31a and the inclined side plate 31b installed so as to flow down and the canvas 35 laid on the bottom portion 31 are formed. The air sent by the air supply pipe 33 through the cap 34 is blown out of the air outlet provided between the air outlets.

As a result, the first container main body 10
Just as in the case of the above, the cement in the second container body 30 is suspended by the airflow rising through the canvas 35 to increase the fluidity, and the smoothness is very smooth even with a gentle inclination of the bottom 31. It flows down toward the cement outlet 43 located in the downward direction of the bottom 31.

At this time, simultaneously, the butterfly damper device 4
4 is actuated by the pneumatic piston device 47, whereby the damper 44 a rotates and shuts off the passage of the take-out passage 2 from the cement outlet 23 of the first container body 10 to the casing 3 a of the drawing screw conveyor device 3, On the other hand,
The damper 44b rotates to the horizontal position, and opens the passage of the take-out path 2 from the cement take-out port 43 of the second container body 30 to the casing 3a of the draw-out screw conveyor device 3.

Therefore, the cement in the second container body 30 smoothly flows down the bottom 31 and flows out of the cement outlet 4.
Screw conveyor device 3 withdrawn from 3 via take-out path 2
And transported to a cement metering device 6 via a vertical screw conveyor device 4 and an obliquely arranged screw conveyor device 5, where it is measured and supplied to a cement production plant or the like by an appropriate means. .

As is clear from the above-described operation, the take-out path 2 is installed so as to be sandwiched between the first container main body 10 and the second container main body 30, and each of the container main bodies 10, 30 is stored. Since each bottom plate is inclined so that the used cement flows down toward the take-out path 2, the take-out path 2 can be used in common for taking out the cement from both container bodies.

As described above, according to the cement storage container 1 according to the present embodiment, a gas permeable canvas is laid on the bottom plate, and air is sent from under the canvas when the cement flows down. The inclination can be made gentle, and as a result, the main cement storage container 1 can be reduced in size. In addition, since the main cement storage container 1 is provided with extendable legs (supports), it can be disassembled. It can be transported by a medium-sized truck without performing, and can be easily installed and used immediately on a narrow construction site such as a mountain area.

When a small amount of cement is used, a special container body, that is, a second container body 30 having a unique configuration is provided even if the cement is purchased in a packaging bag. The packaging bag is automatically cut by simply dropping it into the second container main body 30 from the open upper part, and the cement inside the container is put into the container main body 30, and the gentle inclination is made in the same manner as in the first container main body 10. It can be taken out smoothly by flowing over the bottom plate.

In the above-described embodiment, the cement storage container for accommodating the cement has been described as an example. However, the granules stored in the granule storage container of the present invention are limited to cement. It is needless to say that the present invention can be applied to storage of any kind of powder or granules such as flour and the like.

[0079]

As described above, according to the powdery and granular material storage container of the present invention, a gas permeable sheet is laid on the surface of the bottom plate, air is passed from below the gas permeable sheet, and the powder and granular material on the gas permeable sheet is placed on the gas permeable sheet. , The inclination angle of the bottom plate can be reduced, and as a result, the whole granular material storage container can be reduced in size, and installed and provided with elastic legs (supports). As a result, the vehicle can be transported by a medium-sized truck without being disassembled, and can be easily installed on a narrow construction site such as a mountainous area and used immediately.

Further, according to the granular material storage container of the present invention, when a small amount of the granular material is used, even if a packaged bag is purchased, the exclusive container body having a unique configuration is provided. That is, since the packaging bag is provided with the second container body, the packaging bag is automatically cut just by dropping the packaging bag into the second container body from the open upper part, and the powder inside the container is placed in the container body. Can be stored.

Further, in the granular material storage container, the second container body also uses air to flow the granular material on the bottom plate while fluidizing the granular material, so that the inclination of the bottom plate can be made gentle. In addition, there is an excellent effect that the smooth removal of the granular material and the miniaturization can be achieved at the same time.

[Brief description of the drawings]

FIG. 1 is a front view showing a cement storage container which is an embodiment of a granular material storage container according to the present invention.

FIG. 2 is a plan view showing the cement storage container shown in FIG.

FIG. 3 is a schematic cross-sectional view showing an enlarged main part of the cement storage container shown in FIG. 1;

FIG. 4 is a schematic cross-sectional view of a first container main body constituting the cement storage container shown in FIG. 1, which is cut in a width direction of the bottom plate.

5 is a schematic sectional view showing a bottom part of the first container main body shown in FIG. 4 in a partially enlarged manner.

FIG. 6 is a side view schematically showing a state where the cement storage container shown in FIG. 1 is loaded on a truck bed and transported.

FIG. 7 is a plan view showing the inside of two container bodies in the cement storage container according to one embodiment of the present invention.

FIG. 8 is a partial cross-sectional view schematically showing a mounting structure of a breathable sheet laid on a bottom plate of a first container body in the cement storage container according to one embodiment of the present invention.

FIG. 9 is a plan view showing a cap that covers an air outlet formed on the bottom plates of the two container bodies in the cement storage container according to one embodiment of the present invention.

FIG. 10 is a side view of the cap shown in FIG. 9;

FIG. 11 is a front view partially showing a second container main body constituting the cement storage container shown in FIG. 1;

FIG. 12 is a front view showing a cutting blade held at a distal end of a rotating arm included in the automatic cutting device provided in the second container main body shown in FIG. 11;

FIG. 13 is a front view showing a butterfly damper device for selectively removing cement from first and second container bodies of the cement storage container shown in FIG. 1;

FIG. 14 is a front view showing an operation state of the butterfly damper device shown in FIG.

FIG. 15 is a plan view showing the cement storage container shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cement storage container 2 Take-out path 3 Draw-out screw conveyor device 4 Vertical screw conveyor device 4a Screw conveyor device casing 5 Diagonally arranged screw conveyor device 6 Cement weighing device 7 Receiving pressure feeding pipe 8 Blower 10 First container body 11 Bottom plate 12 Peripheral wall 13 Canvas (breathable sheet) 14 Leg (support) 15 Leg (support) 15a Hollow prism 15b Hollow prism 16 Support steel 17 Mounting plate 18, 20 Strip plate 19 Bolt 21 Air supply pipe 22 Cap 23 Cement take-out port 30 Second container body 31 Bottom part 31a Bottom plate 31b Bevel plate 32 Peripheral wall 33 Air supply pipe 34 Cap 35 Canvas 36 Automatic cutting device 37 Rotating shaft 38 Rotating arm 39 Cutting blade 40 Hypoid motor 41 Holding means 42 Base 43 Cement take-out 4 Butterfly damper device 47 pneumatic piston device 50 the lid 51 Atsumarichirikan 52 back filter T track TR tanker truck B Packaging Bag

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 88/00-90/66 B65B 69/00 B65G 65/48

Claims (3)

(57) [Claims] 1. A first plate comprising a bottom plate which is relatively gently sloped down on one end side and a peripheral wall which stands upright from an outer peripheral portion of the bottom plate, and is capable of storing a granular material of about 20 tons or less. A granular material storage container including a container body, comprising: support members provided at one end and the other end thereof to support the first container body so that the bottom plate is inclined downward to one end. At least the support on the other end side is formed so that the first container main body can be temporarily placed so that the bottom plate can be temporarily placed with the bottom plate parallel to a horizontal plane, and a breathable sheet is provided on the surface of the bottom plate. The air-grain is blown out from at least one air outlet provided between the bottom plate and the air-permeable sheet to pass through the air-permeable sheet, so that the powdery and granular material on the air-permeable sheet is subjected to the first method. Granular material provided at one end of the container body Granular material storage container, characterized in that to flow down to the outlet. 2. A second container body for storing a small amount comprising a bottom plate that is relatively gently inclined and a peripheral wall that stands upright from an outer peripheral portion of the bottom plate is attached to one end of the first container body. An air permeable sheet is also spread on the surface of the bottom plate of the second container body, and further, inside the second container body, the powder and granules stored in a packaging bag made of a flexible sheet are applied. When the whole bag is put in the second container main body, an automatic cutting device is provided for cutting the packaging bag and taking out the powdery material inside the second container main body. By blowing air from at least one air outlet provided between the bottom plate and the air permeable sheet and passing through the air permeable sheet, the powdery material on the air permeable sheet is removed from the first container body. Powder installed between the second container body The granular material storage container according to claim 1, wherein the container is caused to flow down to a granular material outlet. 3. The bottom plate is provided with a cap such that a bowl having an air outlet formed thereon is turned down so as to cover the air outlet formed in the bottom plate. 3. The powdery or granular storage container according to 1 or 2.