JP7343850B2 - dust collection booth - Google Patents

Description

The present invention relates to a dust collection booth. More specifically, the present invention relates to a dust collection booth that allows loading and unloading of suspended loads.

Dust may be generated during the process of loading powder contained in a flexible container bag into another container. At such work sites, it is necessary to collect dust using a local exhaust system to prevent health hazards caused by dust. For example, Patent Document 1 discloses a dust collection hood that surrounds between a flexible container bag and a hopper.

JP2011-042448A

Since flexible container bags have flexibility and change shape, they tend to have gaps between them and the hopper. The larger the gap, the more dust is generated, making it difficult to reliably collect dust with conventional dust collection hoods.

Therefore, it is conceivable to surround the entire space where flexible container bags are opened with a dust collection booth. However, flexible container bags are generally transported using overhead cranes. Therefore, there is a need for a dust collection booth that can carry in and out flexible container bags without interfering with the wire ropes of the overhead crane.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a dust collection booth that allows loading and unloading of suspended loads without interfering with the wire rope of a crane.

The dust collection booth of the first invention includes a side wall that surrounds a predetermined area and has a side opening reaching an upper edge, and a wire rope that spans the upper edge of the side wall and stops from a connection section with the side opening. A top plate having an upper opening reaching the area , an exhaust pipe for dust collection connected to the top plate, a side opening/closing device for opening and closing the side opening, and an upper opening/closing device for opening/closing the upper opening. and an opening/closing drive unit that synchronously opens and closes the side opening/closing device and the top opening/closing device, wherein the top opening/ closing device opens and closes all of the top opening except for the wire rope stopping area in the closed state. or partially occluded .
In the dust collection booth of a second invention, in the first invention, the upper opening/closing device opens and closes one region of the upper opening from a wire rope flow line connecting the connection section and the wire rope stopping region. a second door plate that opens and closes the other area of the upper opening from the wire rope flow line; A second recess is formed at an edge of the second door plate facing the wire rope flow line, and when the first door plate and the second door plate are in a closed state, , wherein the first recess and the second recess form a local opening in the wire rope stopping area.
The dust collection booth of a third invention is characterized in that in the second invention, the opening/closing drive section opens and closes the first door plate and the second door plate.
In the dust collection booth of a fourth invention, in the third invention, the opening/closing drive unit includes a rope whose first end is connected to the second door plate, and a winch that winds up and unwinds the second end of the rope. and a synchronization mechanism that opens and closes the first door plate in synchronization with the opening and closing operation of the second door plate.
In the dust collection booth of a fifth invention, in any one of the first to fourth inventions, the side opening/closing device includes a first rail whose distal end moves up and down with the base end as an axis; a plurality of first runners running along the rails, a first curtain suspended from the plurality of first runners, a second rail whose distal end moves up and down with the base end as an axis; a plurality of second runners running along a second rail; and a second curtain suspended from the plurality of second runners; the first rail is moved from the base end to the tip end; When the first curtain is placed in a lowered position, the first curtain unfolds under its own weight, and when the first rail is placed in an upright position, rising from the base end toward the tip, the first curtain is folded under its own weight, and the first curtain is folded under its own weight. When the second rail is placed in a laid-down position, descending from the base end toward the distal end, the second curtain unfolds under its own weight, and the second rail is placed in an upright position, rising from the base end toward the distal end. Then, the second curtain is folded up by its own weight, the first rail and the second rail are arranged so that their tips face each other, and the first rail and the second rail are placed in the collapsed position. , the distal end of the first rail and the distal end of the second rail are closed, and when the first rail and the second rail are in the upright position, the distal end of the first rail closes. and the tip of the second rail to form a wire rope passage section, and the connection section of the upper opening overlaps the wire rope passage section in a horizontal position.

According to the first invention, since the top plate is formed with the upper opening through which the wire rope passes, suspended loads can be carried in and out of the dust collection booth without interfering with the wire rope. Further, by closing the upper opening with the upper opening/closing device, the opening area of the dust collection booth can be reduced. Since the required control wind speed can be maintained even if the amount of air discharged from the exhaust pipe is reduced, a small exhaust fan can be used, resulting in energy savings.
According to the second invention, since the wire rope stop area can remain open even when the upper opening/closing device is in the closed state, the upper opening can be closed while the load suspended by the crane is placed in the dust collection booth.
According to the third invention, the upper opening/closing device can be opened/closed by operating the opening/closing drive section.
According to the fourth invention, the first door plate and the second door plate can be opened and closed synchronously by operating the winch.
According to the fifth invention, after passing the wire rope with the suspended load through the wire rope passage section of the side opening/closing device, the suspended load is moved within the range where the wire rope is located within the upper opening of the top plate. Can be done. Therefore, suspended loads can be carried in and out of the dust collection booth without interfering with the wire rope.

It is a dust collection booth concerning one embodiment of the present invention, and is a front view of a dust collection booth in a state where a side opening and closing device is closed. FIG. 2 is a front view of the dust collection booth of FIG. 1 with the side opening/closing device open. FIG. 2 is a plan view of the dust collection booth of FIG. 1 with the upper opening/closing device closed. FIG. 2 is a plan view of the dust collection booth of FIG. 1 with the upper opening/closing device open. Figure (A) is a front view of the first beam. Figure (B) is a front view of the first rail.

Next, embodiments of the present invention will be described based on the drawings.
1 to 4 show a dust collection booth AA according to a first embodiment of the present invention. Furthermore, in this specification, x, y, and z directions are defined as shown in FIGS. 1 to 4. The x direction corresponds to the width direction of the dust collection booth AA. The y direction corresponds to the front and back direction of the dust collection booth AA. The z direction corresponds to the height direction of the dust collection booth AA.

The dust collection booth AA of this embodiment surrounds the entire space in which the flexible container bag FC is opened, and prevents the dust generated by the opening work from scattering. Further, the dust collection booth AA has a function of collecting dust by exhausting air.

The flexible container bag FC is carried into the dust collection booth AA while suspended by a crane such as an overhead crane, and is carried out of the dust collection booth AA. In FIG. 2, the symbol HK is a crane hook, and the symbol WR is a wire rope for suspending the hook HK. The flexible container bag FC is hung on the hook HK.

(dust collection booth)
Next, the configuration of the dust collection booth AA will be explained.
The dust collection booth AA has a side wall 11 that surrounds a predetermined area where the flexible container bag FC is opened. The side wall 11 is a three-sided enclosure consisting of three wall surfaces, and is open at the front. The side wall 11 is erected above a hopper HP into which the contents of the flexible container bag FC are charged.

The front opening that the side wall 11 has is referred to as a "side opening 12." The upper part of the side opening 12 reaches the same height as the upper edge 11a of the side wall 11. Note that a wall surface may be provided on a part of the front surface of the dust collection booth AA. For example, a wall surface may be provided in the lower part of the front surface of the dust collection booth AA.

A top plate 13 is spanned over the upper edge 11a of the side wall 11. Most of the upper part of the side wall 11 is covered by the top plate 13. An upper opening 14 is formed in the top plate 13. The upper opening 14 is a substantially U-shaped opening that is long in the y direction, and is arranged at the center of the top plate 13 in the width direction (x direction). The base end of the upper opening 14 is connected to the side opening 12, and the distal end reaches approximately the center of the top plate 13.

As shown in FIG. 4, the section at the base end of the upper opening 14 that connects to the side opening 12 is referred to as a "connection section Ia." Further, the area near the end of the upper opening 14 is referred to as a "wire rope stop area Ws." The upper opening 14 has a shape that extends from the connection section Ia to the wire rope stop area Ws. The wire rope stop area Ws is an area where the wire rope WR of the crane is placed when the flexible container bag FC is placed at a position suitable for unsealing work. The wire rope stop area Ws is set at a position where the entire flexible container bag FC can be accommodated within the dust collection booth AA. The wire rope WR enters the upper opening 14 from the connection section Ia and stops at the wire rope stop area Ws. That is, the upper opening 14 defines the flow line of the wire rope WR. A line connecting the connection section Ia and the wire rope stop area Ws is referred to as a "wire rope flow line Wf." In this embodiment, the wire rope flow line Wf is set at the center of the upper opening 14 in the width direction (x direction).

An exhaust pipe 15 for collecting dust is connected to one wall surface of the side wall 11 . The other end of the exhaust pipe 15 is connected to an exhaust fan (not shown). When the exhaust fan is operated, air inside the dust collection booth AA is sucked through the exhaust pipe 15. Thereby, the dust generated in the dust collection booth AA can be collected and the dust can be suppressed from scattering outside the dust collection booth AA. Note that the exhaust pipe 15 may be connected to the top plate 13 instead of the side wall 11.

(Side opening/closing device)
Next, the configuration of the side opening/closing device 1 will be explained.
A side opening/closing device 1 is provided in the side opening 12 . The side opening/closing device 1 of this embodiment is a curtain device. As shown in FIG. 1, when the side opening/closing device 1 is closed, the side opening 12 is closed, and the dust collection booth AA can be placed in a closed state. As shown in FIG. 2, when the side opening/closing device 1 is opened, the side opening 12 is opened, and the flexible container bag FC can be carried in and out through the side opening 12. That is, the side opening 12 can be opened and closed by the side opening/closing device 1.

The side opening/closing device 1 has a first beam 20A shown in FIG. 5(A). The first beam 20A is a rod-shaped member, and is fixed to the upper edge of the side opening 12 in a horizontal state (see FIG. 2). A disk-shaped sliding plate 21 is fixed to the front surface of the first beam 20A. A through hole 21h is formed in the center of the sliding plate 21 and in the first beam 20A at the back thereof. Further, a pillow plate 22 is fixed to the upper surface of the first beam 20A. The material of the pillow board 22 is not particularly limited, but a material that can absorb impact, such as rubber, is preferable. The sliding plate 21 and the pillow plate 22 are provided at a predetermined interval along the longitudinal direction of the first beam 20A.

A first rail 30A shown in FIG. 5(B) is attached to the front surface of the first beam 20A. The first rail 30A includes a pair of poles 31, 31 and a support member 32 that supports the pair of poles 31, 31. The support member 32 is a rod-shaped member, and poles 31, 31 are fixed to the lower surface thereof. The pair of poles 31, 31 are vertically arranged in parallel with a predetermined interval, and both ends thereof are closed. A plurality of first runners 33A (four in this embodiment) are provided between the pair of poles 31, 31. The first runner 33A runs along the pole 31 (first rail 30A).

The plurality of first runners 33A suspend the first curtain 40A. More specifically, each first runner 33A has a hook. The upper edge of the first curtain 40A is hung on the hook of the first runner 33A at a predetermined interval.

A disc-shaped sliding plate 34 is fixed to the back surface of the base end of the support member 32 . A through hole 34h is formed in the center of the sliding plate 34 and in the supporting member 32 at the front thereof. By stacking the sliding plate 34 of the first rail 30A on the front surface of the sliding plate 21 of the first beam 20A and inserting the pin 23 into the through hole 21h and the through hole 34h, the first rail 30A can be attached to the first beam 20A. is attached (see Figure 3).

In this way, since the base end of the first rail 30A is pivotally supported, the first rail 30A rises and falls so that the distal end moves up and down with the base end as an axis. That is, the inclination angle of the first rail 30A can be changed. When the first rail 30A is placed in a laid-down position downward from the base end toward the distal end, the first runner 33A runs toward the distal end due to its own weight. Conversely, when the first rail 30A is placed in an upright position rising from the base end toward the distal end, the first runner 33A runs toward the base end due to its own weight.

A stopper 35 is provided on the upper surface of the support member 32. The stopper 35 has an inverted L-shape as a whole, and includes a vertical portion 35a erected on the upper surface of the support member 32, and a horizontal portion 35b extending rearward (towards the first beam 20A) from the upper end of the vertical portion 35a. When the first rail 30A is laid down, the horizontal portion 35b is engaged with the pillow board 22 provided on the first beam 20A. This prevents the first rail 30A from further collapsing (clockwise rotation in FIG. 5(B)). The stopper 35 has a function of receiving the weight of the first rail 30A and maintaining the first rail 30A in a laid down position at a specific inclination angle.

The support member 32 extends further outward from the portion where the through hole 34h is provided. This extension is referred to as a first arm 36A. The first arm 36A extends from the base end along the longitudinal direction of the first rail 30A. An eye plate 37 is provided at the tip of the first arm 36A to connect a second rope 63 (described later) used to raise and lower the first rail 30A.

Further, a threaded shaft is provided at the tip of the first arm 36A, and a weight 38 is attached to this threaded shaft. The weight 38 maintains a weight balance between the first rail 30A side and the first arm 36A side with the through hole 34h as a boundary. In this embodiment, the weight on the first rail 30A side is set to be slightly heavier than the weight on the first arm 36A side. Therefore, unless external force is applied, the first rail 30A is maintained in the laid down position. Further, the weight 38 reduces the load when raising the first rail 30A.

A first closing plate 39A is provided on the back surface of the first rail 30A. The first closing plate 39A is provided over the entire length of the first rail 30A. The first closing plate 39A is a substantially triangular plate whose width increases from the base end to the tip end of the first rail 30A. The function of this first closing plate 39A will be described later.

As shown in FIGS. 1 and 2, the side opening/closing device 1 further includes a second beam 20B, a second rail 30B, and a second curtain 40B. The second beam 20B is basically symmetrical with the first beam 20A. The first beam 20A and the second beam 20B are fixed to the upper edge of the side opening 12. Further, the first beam 20A and the second beam 20B are provided with an interval so as to avoid the connection section Ia of the upper opening 14.

The second rail 30B is basically symmetrical to the first rail 30A. The second rail 30B is provided with a plurality of second runners 33B that run along the second rail 30B. A second arm 36B extends from the base end of the second rail 30B. Further, a second closing plate 39B is provided on the second rail 30B. The second curtain 40B is basically symmetrical in structure with the first curtain 40A. The second curtain 40B is suspended from a plurality of second runners 33B.

The second rail 30B also rises and falls so that its distal end moves up and down with the base end as an axis. When the second rail 30B is placed in the lying position, the second runner 33B runs toward the tip due to its own weight. Conversely, when the second rail 30B is placed in the upright position, the second runner 33B runs toward the base end due to its own weight.

The first rail 30A and the second rail 30B are arranged such that their tips face each other. The first rail 30A rotates within the xz plane. The second rail 30B turns in a plane parallel to the turning plane of the first rail 30A. Here, the second rail 30B is arranged ahead of the first rail 30A to such an extent that it does not interfere with the first rail 30A.

Among the two edges of the first curtain 40A along the z direction, one is called a fixed edge 41 and the other is called a free edge 42. The fixed edge 41 is arranged on the proximal end side of the first rail 30A, and the free edge 42 is arranged on the distal end side of the first rail 30A. Further, the fixed edge 41 is fixed to the frame portion 12a of the side opening 12. On the other hand, the free edge 42 is not fixed. The second curtain 40B also has the same configuration as the first curtain 40A, and has a fixed edge fixed to the frame 12a of the side opening 12.

As shown in FIG. 1, when the first rail 30A and the second rail 30B are both laid down, the first curtain 40A and the second curtain 40B are expanded by their own weight. As a result, the side opening/closing device 1 is closed, and the side opening 12 is closed. On the other hand, as shown in FIG. 2, when the first rail 30A and the second rail 30B are both in the upright position, the first curtain 40A and the second curtain 40B are folded by their own weight. As a result, the side opening/closing device 1 is opened and the side opening 12 is opened.

Note that the materials for the first curtain 40A and the second curtain 40B are not particularly limited, but transparent vinyl is preferable. If the first curtain 40A and the second curtain 40B are transparent, the inside of the dust collection booth AA can be checked even when the side opening/closing device 1 is closed.

As described above, the first rail 30A is provided with the first closing plate 39A. When the first rail 30A is placed in the lying position, a gap is created between the first rail 30A and the top plate 13. This gap is closed by the first closing plate 39A. Similarly, the second closing plate 39B provided on the second rail 30B closes the gap between the second rail 30B and the top plate 13 in the collapsed position.

In this way, if the first blocking plate 39A and the second blocking plate 39B are provided, even if the first rail 30A and the second rail 30B are in the laid down position, the gap between the first rail 30A and the top plate 13 and the second The gap between the rail 30B and the top plate 13 is closed. Therefore, the obstructiveness of the dust collection booth AA can be improved.

As shown in FIG. 1, when both the first rail 30A and the second rail 30B are in the lying position, the tip of the first rail 30A and the tip of the second rail 30B intersect, and the space between them is closed. Therefore, the vicinity of the free edge 42 of the first curtain 40A and the vicinity of the free edge of the second curtain 40B overlap. Thereby, it is possible to improve the sealability of the dust collection booth AA when the side opening/closing device 1 is closed.

On the other hand, as shown in FIG. 2, when both the first rail 30A and the second rail 30B are placed in the upright position, the distance between the tip of the first rail 30A and the tip of the second rail 30B opens. The gap formed at this time between the tip of the first rail 30A and the tip of the second rail 30B is referred to as a "wire rope passage section Ib."

The wire rope passage section Ib and the connection section Ia of the upper opening 14 are substantially the same in the horizontal position (position in the x direction). Note that the wire rope passage section Ib and the connection section Ia only need to overlap in the horizontal position. The wire rope passage section Ib and the connection section Ia may be arranged horizontally shifted. One section may include the other section.

In this way, when the side opening/closing device 1 is opened, the wire rope passage section Ib is formed. The wire rope WR of the crane can be passed through the wire rope passage section Ib and can be entered into the upper opening 14 from the connection section Ia. Therefore, the flexible container bag FC can be carried in and out without interference between the side opening/closing device 1 and the wire rope WR.

(Top opening/closing device)
Next, the configuration of the upper opening/closing device 2 will be explained.
As shown in FIGS. 3 and 4, the upper opening/closing device 2 is provided in the upper opening 14. As shown in FIGS. As shown in FIG. 3, when the upper opening/closing device 2 is closed, most of the upper opening 14 is closed. As shown in FIG. 4, when the upper opening/closing device 2 is opened, the upper opening 14 is opened, and the wire rope WR can be passed through the upper opening 14. That is, the upper opening/closing device 2 can open and close the upper opening 14 .

The upper opening/closing device 2 has a first door plate 50A and a second door plate 50B. The first door plate 50A is a plate-shaped member and is placed on the top plate 13. The first door plate 50A is arranged to the left of the upper opening 14. Further, a pivot shaft 51A is provided upright on the left side of the top plate 13. A pivot shaft 51A is inserted into a hole formed at the end of the first door plate 50A. Therefore, the first door plate 50A pivots in a horizontal plane along the top plate 13 around the pivot axis 51A.

Similarly, the second door plate 50B is a plate-shaped member and is placed on the top plate 13. The second door plate 50B is arranged on the right side of the upper opening 14. Further, a pivot shaft 51B is provided upright on the right side of the top plate 13. A pivot shaft 51B is inserted into a hole formed at the end of the second door plate 50B. Therefore, the second door plate 50B pivots in a horizontal plane along the top plate 13 around the pivot axis 51B.

As shown in FIG. 3, the first door plate 50A and the second door plate 50B are turned so as to approach each other and are brought into a closed state. Then, the edge of the first door plate 50A and the edge of the second door plate 50B come into contact, and most of the upper opening 14 is closed by the first door plate 50A and the second door plate 50B.

On the other hand, as shown in FIG. 4, the first door plate 50A and the second door plate 50B are rotated so as to be separated from each other and brought into an open state. Then, the space between the first door plate 50A and the second door plate 50B widens, creating a V-shaped space that spreads toward the connection section Ia. In this way, the first door plate 50A opens and closes the area on one side (left side) of the upper opening 14 from the wire rope flow line Wf. Further, the second door plate 50B opens and closes the other (right side) region of the upper opening 14 from the wire rope flow line Wf.

The upper opening/closing device 2 has a synchronization mechanism 52 that synchronizes the opening/closing operations of the first door plate 50A and the second door plate 50B. The synchronization mechanism 52 consists of a roller arm 52a and a tension spring 52b. The roller arm 52a is a member having a roller provided at the tip of the arm. The base end of the arm is fixed to the second door plate 50B, and the roller is in contact with the edge of the first door plate 50A. The tension spring 52b has one end fixed to the first door plate 50A and the other end fixed to the second door plate 50B. The first door plate 50A and the second door plate 50B are biased in the closing direction by the tension spring 52b.

When the second door plate 50B is turned in the opening direction, the roller of the roller arm 52a pushes the edge of the first door plate 50A, and the first door plate 50A is turned in the opening direction. Further, when the second door plate 50B is turned in the closing direction, the first door plate 50A is turned in the closing direction due to the bias of the tension spring 52b. In this way, the synchronization mechanism 52 of this embodiment opens and closes the first door plate 50A in synchronization with the opening and closing operation of the second door plate 50B.

Note that the synchronization mechanism 52 is not limited to the above configuration as long as it is a mechanism that can synchronize the opening and closing operations of the first door plate 50A and the opening and closing operations of the second door plate 50B. Further, the synchronization mechanism 52 may not be provided.

A first recess 53A is formed in the edge of the first door plate 50A that faces the wire rope flow line Wf. Furthermore, a second recess 53B is formed in the edge of the second door plate 50B that faces the wire rope flow line Wf. As shown in FIG. 3, when the first door plate 50A and the second door plate 50B are closed, the first recess 53A and the second recess 53B are combined to form a local opening in the wire rope stop area Ws. In this way, even when the upper opening/closing device 2 is in the closed state, the wire rope stop area Ws can remain open, so the upper opening 14 can be closed while the flexible container bag FC is placed in the dust collection booth AA.

Moreover, as shown in FIG. 4, the first door plate 50A has a corner facing the connection section Ia that is chamfered to form a guide portion 54A. A guide portion 54B is also formed on the second door plate 50B. Therefore, the wire rope WR passed from the connection section Ia toward the inside of the upper opening 14 is not caught on the corners of the first door plate 50A and the second door plate 50B.

(Opening/closing drive part)
As shown in FIG. 1, the dust collection booth AA includes an opening/closing drive unit 60 that opens and closes the side opening/closing device 1 and the top opening/closing device 2. The opening/closing drive section 60 has a winch 61. A winch 61 is provided on the side wall 11. The winch 61 may be manual or electric.

A first rope 62 is unwound from the winch 61. Note that the first rope 62 corresponds to the "rope" described in the claims. The first rope 62 unwound from the winch 61 is guided along the outer periphery of the dust collection booth AA by a plurality of pulleys, and the first end is connected to the second door plate 50B (see FIG. 3). The first rope 62 extends laterally of the second door plate 50B. The winch 61 winds up the second end of the first rope 62 and unwinds it.

A first end of a second rope 63 is connected to the eye plate 37 of the first arm 36A. The second rope 63 extends downward from the eye plate 37 of the first arm 36A, and has a second end connected to the intermediate portion of the first rope 62.

A first end of a third rope 64 is connected to the eye plate 37 of the second arm 36B. The third rope 64 is guided by a pulley to extend downward from the eye plate 37 of the second arm 36B. The third rope 64 is guided along the outer periphery of the dust collection booth AA by a plurality of pulleys, and its second end is connected to the intermediate portion of the first rope 62 (see FIG. 3).

When the first rope 62 is wound up by the winch 61, the first arm 36A and the second arm 36B are pulled downward, and the first rail 30A and the second rail 30B stand up (the state shown in FIG. 2). When the first rope 62 is unwound by the winch 61, the first rail 30A and the second rail 30B collapse under their own weight (the state shown in FIG. 1). By operating the winch 61 in this manner, the first rail 30A and the second rail 30B can be raised and lowered in synchronization. Moreover, this allows the side opening/closing device 1 to be opened and closed.

Furthermore, when the first rope 62 is wound up by the winch 61, the second door plate 50B is pulled laterally and pivoted in the opening direction (the state shown in FIG. 4). When the second door plate 50B turns in the opening direction, the first door plate 50A turns in the opening direction due to the action of the synchronization mechanism 52. When the first rope 62 is unwound by the winch 61, the first door plate 50A and the second door plate 50B turn in the closing direction due to the bias of the tension spring 52b (the state shown in FIG. 3). By operating the winch 61 in this manner, the first door plate 50A and the second door plate 50B can be opened and closed in synchronization. Moreover, this allows the upper opening/closing device 2 to be opened and closed.

As described above, the opening/closing drive section 60 of this embodiment can open/close the side opening/closing device 1 and the upper opening/closing device 2 in synchronization. Note that the opening/closing drive section for the side opening/closing device 1 and the opening/closing drive section for the top opening/closing device 2 may be provided separately. The opening/closing drive unit for the side opening/closing device 1 only needs to be able to raise and lower the first rail 30A and the second rail 30B, and its configuration is not limited to the above configuration. For example, each of the first rail 30A and the second rail 30B may be rotated by an electric motor. The opening/closing drive unit for the upper opening/closing device 2 only needs to be able to open and close the first door plate 50A and the second door plate 50B, and its configuration is not limited to the above configuration. For example, each of the first door plate 50A and the second door plate 50B may be rotated by an electric motor.

(how to use)
Next, how to use the dust collection booth AA will be explained.
First, the opening/closing drive unit 60 is operated to put the first rail 30A and the second rail 30B in the standing position. Then, as shown in FIG. 2, the first curtain 40A and the second curtain 40B are folded, and the side opening 12 is opened. At the same time, a wire rope passage section Ib is formed between the first rail 30A and the second rail 30B. Moreover, at the same time, as shown in FIG. 4, the first door plate 50A and the second door plate 50B are brought into an open state, and the upper opening 14 is opened.

Next, the flexible container bag FC hung on the hook HK of the crane is carried into the dust collection booth AA. Here, the height of the flexible container bag FC may be lower than the top plate 13 and the first and second rails 30A and 30B. When the flexible container bag FC is conveyed backward (in the y direction) while being positioned at the center in the width direction (in the x direction) of the dust collection booth AA, the wire rope WR passes through the wire rope passage section Ib. Therefore, there is no interference between the side opening/closing device 1 and the wire rope WR.

Thereafter, when the flexible container bag FC is further transported rearward, the wire rope WR enters the upper opening 14 from the connection section Ia. After that, the flexible container bag FC can be moved within the range where the wire rope WR is located within the upper opening 14. By stopping the wire rope WR in the wire rope stopping area Ws, the flexible container bag FC can be placed at a position suitable for unsealing work. In this way, the flexible container bag FC can be carried into the dust collection booth AA without interfering with the wire rope WR.

Next, the opening/closing drive section 60 is operated to bring the first rail 30A and the second rail 30B into a lying position. Then, as shown in FIG. 1, the first curtain 40A and the second curtain 40B are expanded, and the side opening 12 is closed. At the same time, as shown in FIG. 3, the first door plate 50A and the second door plate 50B are in a closed state, and most of the upper opening 14 is closed.

In this state, the flexible container bag FC is opened. The contents that have fallen from the bottom opening of the flexible container bag FC are thrown into the hopper HP. This opening process generates dust. However, the dust collection booth AA can prevent dust from scattering to the outside. In addition, dust can be collected by the dust collection booth AA.

By the way, in order to prevent dust from scattering to the outside, it is necessary to maintain the controlled wind speed at the opening above a certain level. The amount of air discharge required to maintain the required controlled air speed depends on the area of the opening. The larger the area of the opening, the greater the required amount of exhaust air.

Here, most of the upper opening 14 is closed by the upper opening/closing device 2. Thereby, the opening area of the dust collection booth AA is smaller than when the upper opening 14 is open. Since the necessary control wind speed can be maintained even if the amount of air discharged from the exhaust pipe 15 is reduced, a small-sized exhaust fan can be used. As a result, energy can be saved.

After the opening operation is completed, the side opening/closing device 1 and the top opening/closing device 2 are opened, and the flexible container bag FC is carried out of the dust collection booth AA. Carrying out the flexible container bag FC is performed in the reverse order of carrying it in. Even during carrying out, the wire rope WR does not interfere with the dust collection booth AA.

[Other embodiments]
The side opening/closing device 1 may have a configuration that does not interfere with the wire rope WR, and is not limited to the configuration of the above embodiment. As the side opening/closing device 1, a double door may be used, or a roll-up type shutter with a wind-up shaft disposed below may be used.

The upper opening/closing device 2 may be configured to close all or part of the upper opening 14 except for the wire rope stop area Ws in the closed state, and is not limited to the configuration of the above embodiment. For example, the first door plate 50A and the second door plate 50B may be configured to slide in a direction perpendicular to the wire rope flow line Wf. Alternatively, the upper opening 14 may be opened and closed using one door plate.

The use of the dust collection booth AA is not limited to the work of opening flexible container bags FC. The dust collection booth AA can be used for various operations that generate dust. Therefore, the load to be lifted by the crane is not limited to the flexible container bag FC. Other containers such as drums may also be used.

AA Dust collection booth 11 Side wall 12 Side opening 13 Top plate 14 Upper opening 15 Exhaust pipe 1 Side opening/closing device 2 Upper opening/closing device 50A First door plate 50B Second door plate

Claims (5)

a side wall enclosing a predetermined area and having a side opening reaching the upper edge;
a top plate having an upper opening extending over the upper edge of the side wall and reaching a wire rope stop area from a connection section with the side opening ;
an exhaust pipe for dust collection connected to the top plate;
a side opening/closing device that opens and closes the side opening;
an upper opening/closing device that opens and closes the upper opening;
an opening/closing drive unit that opens and closes the side opening/closing device and the top opening/closing device synchronously,
The upper opening/closing device closes all or part of the upper opening except for the wire rope stopping area in the closed state.
A dust collection booth characterized by: The upper opening/closing device is
a first door plate that opens and closes one area of the upper opening from a wire rope flow line connecting the connection section and the wire rope stop area;
A second door plate that opens and closes the other area of the upper opening from the wire rope flow line,
A first recess is formed in an edge of the first door plate facing the wire rope flow line,
A second recess is formed in an edge of the second door plate facing the wire rope flow line,
The collection according to claim 1 , wherein when the first door plate and the second door plate are placed in a closed state, the first recess and the second recess form a local opening in the wire rope stopping area. dust booth. The opening/closing drive unit opens and closes the first door plate and the second door plate.
The dust collection booth according to claim 2 , characterized in that: The opening/closing drive section is
a rope having a first end connected to the second door plate;
a winch that winds and unwinds the second end of the rope;
The dust collection booth according to claim 3 , further comprising a synchronization mechanism that opens and closes the first door plate in synchronization with the opening and closing operation of the second door plate. The side opening/closing device is
a first rail that rises and falls so that the distal end moves up and down with the base end as an axis;
a plurality of first runners running along the first rail;
a first curtain suspended from the plurality of first runners;
a second rail that rises and falls so that the distal end moves up and down with the base end as an axis;
a plurality of second runners running along the second rail;
a second curtain suspended from the plurality of second runners,
When the first rail is placed in a laid-down position downward from the base end toward the distal end, the first curtain unfolds under its own weight;
When the first rail is placed in an upright position rising from the base end toward the distal end, the first curtain is folded under its own weight;
When the second rail is placed in a lying position in which it descends from the base end toward the tip end, the second curtain unfolds under its own weight,
When the second rail is placed in an upright position rising from the base end toward the distal end, the second curtain is folded under its own weight;
The first rail and the second rail are arranged such that the tip ends thereof face each other,
When the first rail and the second rail are in the laid down position, the distance between the tip end of the first rail and the tip end of the second rail is closed;
When the first rail and the second rail are placed in the upright position, a distance between the tip end of the first rail and the tip end of the second rail is opened to form a wire rope passage section;
The dust collection booth according to any one of claims 1 to 4 , wherein the connection section of the upper opening overlaps the wire rope passage section in a horizontal position.

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