Fall prevention device for garbage disposal facility

Abstract

To provide a fall prevention device for a garbage disposal facility which can operate without coming into contact with a garbage truck when opening / closing a charging port of a garbage storage part, and is hardly damaged by the garbage discharged from the garbage truck.SOLUTION: A fall prevention device 10 for a garbage disposal facility comprises a first lid member 11 for covering at least the front portion of a charging port 5a of a hopper 5 and a driving device 20 for moving the first lid member 11 in the longitudinal direction. The driving device 20 moves the first lid member 11 backward when opening the charging port 5a, and moves the first lid member 11 forward when covering the charging port 5a.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a fall prevention device for a waste treatment facility that includes a waste storage section for storing waste and prevents falls into the waste storage section in the waste treatment facility.

Background Art

[0002] Waste discharged from homes and the like is collected by a waste truck and transported to a waste treatment facility. The waste treatment facility is provided with a waste storage section for storing the waste carried by the waste truck. An inlet for introducing waste into the waste storage section is formed in the waste storage section. Therefore, there is a risk that people, objects, etc. may fall from the inlet into the waste storage section.

[0003] Therefore, conventionally, a fall prevention device for preventing people, objects, etc. from falling into the waste storage section has been provided in the waste treatment facility. For example, Patent Document 1 discloses a fall prevention device including a safety net vertically stretched in front of a garbage pit that is a waste storage section. The fall prevention device disclosed in Patent Document 1 is configured such that the upper end portion of the safety net can be moved in the vertical direction. When the safety net is stretched, people cannot approach the garbage pit, and the fall of people into the garbage pit is prevented. When the upper end portion of the safety net moves downward, the waste truck can enter near the garbage pit and the waste can be introduced into the garbage pit.

[0004] Also, Patent Document 2 discloses a fall prevention device including an inlet door that can open and close the inlet of the garbage pit by rotating back and forth. When the inlet is closed by the inlet door, the fall of people into the garbage pit is prevented. When the inlet door is rotated forward to open the inlet, the waste truck can introduce waste into the garbage pit.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] By the way, in order to prevent people, objects, etc. from falling into the dust storage section, it is preferable that the inlet is closed except when dust is being put into the dust storage section. That is, it is preferable to open and close the inlet when the dust truck is stopped at the loading position. Here, the loading position is the position of the dust truck when the dust truck is loading dust into the dust storage section. As shown in FIG. 23, when the dust truck 101 is stopped at the loading position, the rear part of the dust truck 101 may protrude above the inlet 105a of the dust storage section 105. In the fall prevention device described in Patent Document 1, the fall prevention device is operated to open the inlet when the dust truck 101 comes in front of the loading position. After that, the dust truck 101 reverses toward the loading position. Therefore, there is a possibility that people, objects, etc. may fall between the time when the inlet is opened and the time when the dust truck 101 stops at the loading position. In the fall prevention device described in Patent Document 2, since the loading door after opening the inlet forms the dust input path, there is a risk that the loading door may be damaged by the dust discharged from the dust truck 101 and falling.

[0007] The present invention has been made in view of such points, and an object thereof is to provide a fall prevention device for a dust treatment facility capable of opening and closing the inlet of a dust storage section, which does not come into contact with a dust truck during operation and is not easily damaged by dust discharged from the dust truck. [Means for Solving the Problems]

[0008] The fall prevention device for a refuse treatment facility according to the present invention is a fall prevention device that prevents the fall of refuse into a refuse storage section in a refuse treatment facility where an inlet is formed and refuse is introduced from the front. The fall prevention device includes a first lid member that covers at least the front portion of the inlet of the refuse storage section, and a driving device that moves the first lid member in the front-rear direction. The driving device moves at least the front end portion of the first lid member rearward when opening the inlet, and moves at least the front end portion of the first lid member forward when covering the inlet.

[0009] According to the above configuration, the inlet is opened by moving the first lid member rearward. That is, when the inlet is opened, the first lid member moves in a direction opposite to the refuse truck parked in front of the refuse storage section. Thereby, when operating the first lid member to open the inlet, it is difficult for the first lid member and the refuse truck to come into contact with each other. Also, since the refuse discharged from the refuse truck is unlikely to contact the first lid member, the fall prevention device is less likely to be damaged.

[0010] When the first lid member covers the inlet, the first lid member may be provided so as to be horizontal.

[0011] According to the above configuration, when the first lid member covers the inlet, the first lid member is provided horizontally. Thereby, the rear portion of the refuse truck can stop at a position protruding into the refuse storage section, and the refuse can be surely introduced into the hopper.

[0012] The fall prevention device may further include a second lid member provided behind the first lid member and covering the inlet, a guide rail provided on the side of the first lid member and extending in the front-rear direction, an engaging member provided on both side portions of the first lid member and engaged with the guide rail, and a pin provided at the front end portion of the second lid member and rotatably supporting the first lid member with respect to the second lid member. The driving device may rotate the second lid member upward about the rear end portion of the second lid member when opening the inlet.

[0013] According to the above configuration, when opening the inlet, the front end portion of the second lid member moves upward. At the same time, the first lid member rotates downward about the pin and moves rearward. As a result, since the front portion of the first lid member moves rearward, it is difficult for the dustbin and the first lid member to come into contact during the operation of the fall prevention device. Further, when opening the inlet, since the first lid member rotates downward about the pin, the first lid member is in a state of inclining downward as it goes forward. Thus, even if dust accumulates on the first lid member, the dust can be dropped into the dust storage portion.

[0014] The engaging member may be disposed rearward of the front end portion of the first lid member.

[0015] Since the dustbin throws dust into the dust storage portion from the front, dust is likely to accumulate on the front side of the dust storage portion. According to the above configuration, when opening the inlet, the front portion of the first lid member moves downward and rearward, so that the dust accumulated on the front side of the dust storage portion can be scraped rearward by the front portion of the first lid member. Thereby, the dust stored in the dust storage portion can be evenly distributed between the front side and the rear side of the dust storage portion.

[0016] A caution display portion may be provided on the upper surface of the first lid member or the lower surface of the front end portion of the second lid member.

[0017] When opening the inlet, the upper surface of the first lid member and the lower surface of the front end portion of the second lid member face forward. Therefore, when the inlet is open, the operator can easily visually recognize the upper surface of the first lid member and the lower surface of the front end portion of the second lid member. According to the above configuration, since the caution display portion is provided on the upper surface of the first lid member or the lower surface of the front end portion of the second lid member, the operator can easily recognize that the inlet is open. A caution can be given to the operator.

[0018] The fall prevention device may include a front side portion extending in the front-rear direction and a rear side portion connected to the rear end portion of the front side portion and extending in the vertical direction, and a guide rail provided on the side of the first lid member and an engaging member provided on the side portion of the first lid member and engaged with the guide rail.

[0019] According to the above configuration, when the first lid member moves backward along the guide rail, the loading opening is opened. When the loading opening is opened, the first lid member is in a state of extending in the vertical direction. Thereby, the dust on the first lid member can be dropped into the dust storage portion. Here, the state where the first lid member extends in the vertical direction includes both the case where the first lid member extends in the vertical direction and the case where the first lid member extends in a direction inclined from the vertical direction.

[0020] The fall prevention device may include a guide rail provided on the side of the first lid member and extending in the front-rear direction, and an engagement member provided on the side portion of the first lid member and engaged with the guide rail.

[0021] According to the above configuration, the configuration of the guide rail can be simplified, and the configuration of the fall prevention device can be simplified.

[0022] The first lid member may include a net or a slat. The driving device may wind the net or the slat around the rear end portion of the net or the slat.

[0023] According to the above configuration, when the loading opening is open, the net or the slat is wound. Thereby, even if the space around the dust storage portion is narrow, a fall prevention device can be provided.

[0024] The first lid member may include a plurality of plate members arranged in the front-rear direction. Among the plate members adjacent to each other, the plate member arranged on the front side may be connected to be relatively movable in the front-rear direction with respect to the plate member arranged on the rear side.

[0025] According to the above configuration, when the loading opening is open, the plate member arranged on the front side among the plate members adjacent to each other overlaps the plate member arranged on the rear side. Thereby, even if the space around the dust storage portion is narrow, a fall prevention device can be provided.

[0026] The first lid member may be composed of a telescopic member, and the driving device may be provided on both sides of the first lid member and configured to expand and contract the first lid member.

[0027] According to the above configuration, the fall prevention device can be made lightweight and compact, and the fall prevention device can be provided even if the space around the dust storage section is narrow.

Effect of the Invention

[0028] According to the present invention, it is possible to provide a fall prevention device for a dust treatment facility that can operate without coming into contact with a dust cart when opening and closing the inlet of the dust storage section and is not easily damaged by the dust discharged from the dust cart.

Brief Description of the Drawings

[0029]

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Mode for Carrying Out the Invention

[0030] <First Embodiment> Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of the hopper 5 and the fall prevention device 10 according to this embodiment as viewed from the side. FIG. 2 is a schematic view of the hopper 5 and the fall prevention device 10 as viewed from above. The hopper 5 is a container for temporarily storing the dust and dirt collected by the dustcart 1, and is an example of a dust storage section. The dustcart 1 approaches the hopper 5 from the front of the hopper 5 and discharges the dust and dirt into the hopper 5.

[0031] In the following description, unless otherwise specified, the left side of the paper of FIG. 1 is taken as the front side. That is, the side where the dustcart 1 is stopped as viewed from the hopper 5 is taken as the front. Also, in the following description, left, right, up, and down respectively mean left, right, up, and down when viewed from the front side. The reference signs F, Rr, L, R, U, and D in the drawings respectively mean front, rear, left, right, up, and down.

[0032] As shown in FIG. 1, the hopper 5 is disposed below the floor 3. As shown in FIGS. 1 and 2, the hopper 5 is formed in a box shape. The upper part of the hopper 5 is an open inlet 5a. Thereby, the dust and dirt can be introduced into the hopper 5 from the inlet 5a. In this embodiment, since the dustcart 1 stops in front of the hopper 5 and discharges the dust and dirt into the hopper 5, the dust and dirt discharged from the dustcart 1 into the hopper 5 mainly pass through the front side of the inlet 5a and are introduced into the hopper 5. Note that in this embodiment, the inlet 5a is formed in a rectangular shape, but the shape of the inlet 5a is not particularly limited. Also, although not shown, a dust conveying device is connected to the hopper 5. The type and configuration of the dust conveying device are not particularly limited, and examples include a screw conveyor, an apron conveyor, a feeder, and a compactor.

[0033] In this embodiment, the dustcart 1 is stopped in front of the hopper 5, and the dustcart 1 discharges the collected dust into the hopper 5. As shown in FIG. 1, a vehicle stopper 7 is provided in front of the hopper 5. The vehicle stopper 7 is a part that restricts the backward movement of the dustcart 1 so that the dustcart 1 does not fall into the hopper 5 when the dustcart 1 moves backward toward the hopper 5. In this embodiment, the vehicle stopper 7 is formed by providing a step on the floor 3. Furthermore, by restricting the backward movement of the dustcart 1, the dustcart 1 can be easily stopped at the loading position. Here, the loading position is the parking position when the dustcart 1 discharges dust into the hopper 5. Note that the configuration of the vehicle stopper 7 is not limited to this.

[0034] As shown in FIG. 2, splash prevention plates 9 are provided to the left, right, and rear of the hopper 5. Note that the illustration of the splash prevention plates 9 is omitted in FIG. 1. The splash prevention plates 9 are plate-shaped members extending upward from the floor 3. The splash prevention plates 9 are members that prevent the dust discharged from the dustcart 1 parked in front of the hopper 5 from scattering outside the hopper 5. In addition, the provision of the splash prevention plates 9 prevents an operator from falling into the hopper 5 from the left, right, and rear of the hopper 5.

[0035] A fall prevention device 10 is provided above the hopper 5. FIG. 3 shows an enlarged view of the fall prevention device according to this embodiment as viewed from above. The fall prevention device 10 is a device for preventing a person from falling into the hopper 5 from the front of the hopper 5 where the splash prevention plates 9 are not provided. The fall prevention device 10 is configured to be able to open and close the loading opening 5a of the hopper 5. In the following description, the position of the fall prevention device 10 when the fall prevention device 10 covers at least the front side of the loading opening 5a is defined as the closed position, and the position of the fall prevention device 10 when at least the front side of the loading opening 5a is open is defined as the open position. The fall prevention device 10 includes a first lid member 11, a second lid member 15, a guide rail 19, and a drive device 20.

[0036] The first lid member 11 is a member that covers the front side of the inlet 5a of the hopper 5. When the first lid member 11 covers the front side of the inlet 5a, the first lid member 11 is provided so as to be horizontal (see Fig. 1). The first lid member 11 includes a first frame 12 and a first net 13. The shape of the first frame 12 is not particularly limited, but in this embodiment, the outer shape of the first frame 12 is square. The first frame 12 is formed in a lattice shape. The material of the first frame 12 and the like is not particularly limited, but in this embodiment, it is formed by combining a plurality of steel materials.

[0037] The first net 13 is fixed to the upper surface of the first frame 12. The shape of the first net 13 is square, similar to the shape of the first frame 12. The lengths of the first net 13 in the front-rear direction and the left-right direction are substantially equal to the lengths of the first frame 12 in the front-rear direction and the left-right direction. The material of the first net 13 is not particularly limited, but in this embodiment, it is nylon.

[0038] The second lid member 15 is a member that covers the rear side of the inlet 5a of the hopper 5. When the second lid member 15 covers the rear side of the inlet 5a, the second lid member 15 is provided so as to be horizontal (see Fig. 1). The second lid member 15 is disposed at the rear of the first lid member 11. The second lid member 15 includes a second frame 16 and a second net 17. The shape of the second frame 16 is not particularly limited, but in this embodiment, the outer shape of the second frame 16 is square. The second frame 16 is formed in a lattice shape. The material of the second frame 16 and the like is not particularly limited, but in this embodiment, it is formed by combining a plurality of steel materials.

[0039] The second net 17 is fixed to the upper surface of the second frame 16. The shape of the second net 17 is square, similar to the shape of the second frame 16. The lengths of the second net 17 in the front-rear direction and the left-right direction are substantially equal to the lengths of the second frame 16 in the front-rear direction and the left-right direction. The material of the second net 17 is not particularly limited, but in this embodiment, it is nylon.

[0040] The second lid member 15 is provided with pins 18. The pins 18 are members that connect the first frame 12 and the second frame 16. The pins 18 are provided at the left front end and the right front end of the second frame 16. The pins 18 extend in the left-right direction. The pins 18 rotatably support the rear end portion of the first frame 12 with respect to the second frame 16. Thereby, the first frame 12 can rotate with respect to the second frame 16 about an axis extending in the left-right direction.

[0041] The guide rails 19 are provided on the left and right sides of the first frame 12. In the present embodiment, the guide rails 19 are connected to the lower end portions of the splash prevention plates 9 provided on the left and right sides of the hopper 5. The guide rails 19 extend in the front-rear direction.

[0042] The first lid member 11 is provided with a pair of left and right rollers 14. The rollers 14 are connected to the left end portion and the right end portion of the first frame 12 via shafts 14a. In the front-rear direction, the rollers 14 are disposed on the front side of the center of the first frame 12 and on the rear side of the front end of the first frame 12. The rollers 14 are provided so as to be rotatable with respect to the shafts 14a. The rollers 14 are engaged with the guide rails 19. The rollers 14 are provided so as to roll on the guide rails 19. Thereby, the first frame 12 can move in the front-rear direction along the guide rails 19.

[0043] A drive device 20 is connected to the rear end portion of the second frame 16. In the present embodiment, the drive device 20 is connected to the left rear end portion of the second frame 16. The type of the drive device 20 is not particularly limited, but in the present embodiment, the drive device 20 is a motor with a speed reducer. The drive device 20 rotates the second frame 16 in the vertical direction about the rear end portion of the second frame 16. When opening the inlet 5a, the drive device 20 rotates the second frame 16 upward (clockwise in FIG. 1). When closing the inlet 5a, the drive device 20 rotates the second frame 16 downward (counterclockwise in FIG. 1).

[0044] On the upper surface of the first frame 12, a caution display section 25 is provided. The caution display section 25 is a member for alerting an operator that the insertion port 5a is open when the insertion port 5a is open (see Fig. 6). The display mode of the caution by the caution display section 25 is not particularly limited. For example, a member with characters such as "Insertion port open" may be provided on the upper surface of the first frame 12, or a warning tape or the like may be attached to the upper surface of the first frame 12. Note that the position where the caution display section 25 is provided is not limited to this. For example, it may be provided on the lower surface of the front end portion of the second frame 16 or the like.

[0045] Hereinafter, the operation of the fall prevention device 10 when opening and closing the insertion port 5a of the hopper 5 will be described. Figs. 4, 5, and 6 are enlarged views of the fall prevention device 10 as viewed from the side. Fig. 4 shows the fall prevention device 10 when the fall prevention device 10 is in the closed position. Fig. 5 shows the fall prevention device 10 when the fall prevention device 10 is moving from the closed position to the open position. Fig. 6 shows the fall prevention device 10 when the fall prevention device 10 is in the open position.

[0046] As shown in Fig. 4, when the fall prevention device 10 closes the insertion port 5a, the first lid member 11 and the second lid member 15 are provided horizontally. Thereby, the insertion port 5a is covered by the first lid member 11 and the second lid member 15. Therefore, it is possible to prevent people, objects, etc. from falling from the insertion port 5a into the hopper 5.

[0047] As shown in FIG. 5, when the driving device 20 rotates the second frame 16 upward (clockwise in FIG. 5) about the rear end portion of the second frame 16, the front end portion of the second frame 16 moves upward and rearward. Since the front end portion of the second frame 16 and the rear end portion of the first frame 12 are connected by the pin 18, the rear end portion of the first frame 12 also moves upward and rearward. Since the first frame 12 is rotatably supported by the pin 18 with respect to the second frame 16, the first frame 12 rotates downward (counterclockwise in FIG. 5) about the rear end portion of the first frame 12. The front end portion of the first frame 12 moves downward and rearward. Since the roller 14 engaged with the guide rail 19 is connected to the first frame 12, the first frame 12 moves rearward along the guide rail 19. As described above, when the second frame 16 is rotated upward, the first frame 12 moves rearward while rotating downward about the rear end portion of the first frame 12.

[0048] As shown in FIG. 6, when the driving device 20 rotates the second frame 16 by a predetermined angle (for example, 85°), the fall prevention device 10 ends its operation. By the above operation, the fall prevention device 10 moves from the closed position to the open position. Thereby, the charging port 5a is opened. As described above, since the first frame 12 rotates downward about the rear end portion, the upper surface of the first frame 12 that faced upward when the fall prevention device 10 was in the closed position faces forward when the fall prevention device 10 is in the open position. Therefore, when the charging port 5a is open, the operator can visually recognize the warning display portion 25 from the front of the hopper 5 where there is a possibility of scattering and falling without the anti-scattering plate 9 being provided. Thereby, it is possible to alert the operator approaching the hopper 5 from the front that the charging port 5a is open.

[0049] On the other hand, when closing the charging port 5a, the driving device 20 rotates the second frame 16 downward (counterclockwise in FIG. 5) about the rear end portion of the second frame 16. Thereby, the front end portion of the second frame 16 and the rear end portion of the first frame 12 move downward. At the same time, the first frame 12 moves forward along the guide rail 19. Thereby, the charging port 5a is closed.

[0050] Hereinafter, a series of flows when the garbage truck 1 throws garbage into the hopper 5 will be described. FIG. 7 is an example of a flowchart of the process of the garbage truck 1 throwing garbage into the hopper 5.

[0051] In step S01, the garbage truck 1 reverses toward the hopper 5 and moves to the loading position. The garbage truck 1 stops when it reaches the loading position. At this time, as shown in FIG. 1, the rear part of the garbage truck 1 protrudes into the hopper 5 and is located above the first lid member 11 of the fall prevention device 10.

[0052] When the garbage truck 1 stops at the loading position, in step S02, the operator operates the fall prevention device 10 to open the loading port 5a. In the present embodiment, the operator operates the fall prevention device 10 by pressing an operation switch (not shown) provided around the hopper 5. At this time, since the front end portion of the first frame 12 moves rearward and downward, the fall prevention device 10 can be operated without the garbage truck 1 coming into contact with the first frame 12. Further, at the same time as opening the loading port 5a, as shown in FIG. 8, the front end portion of the first frame 12 can scrape the garbage accumulated on the front side of the hopper 5 rearward. In step S02, instead of the operator pressing the operation switch, sensors, cameras, etc. may be provided in the garbage disposal facility, and based on the measurement results of the sensors, the photographed images of the cameras, etc., it may be confirmed that the garbage truck 1 has come to the loading position, and the fall prevention device 10 may be automatically operated.

[0053] In step S03, as shown in FIG. 9, the garbage truck 1 performs a dumping operation toward the rear, and the garbage inside the garbage truck 1 is put into the hopper 5. At this time, since the garbage is put into the hopper 5 from the front of the hopper 5, the garbage is put into the hopper 5 through the region A1 indicated by the dashed line in FIG. 9. The region A1 is a region occupying the front side among the upper part of the hopper 5. On the other hand, when the inlet 5a is open, most of the first lid member 11 and the second lid member 15 are located inside the region A2 indicated by the dashed line in FIG. 9. The region A2 is a region occupying the rear side among the upper part of the hopper 5. As can be seen from FIG. 9, the region A2 does not overlap with the region A1. Thereby, when the garbage truck puts the garbage into the hopper 5, the garbage is less likely to come into contact with the fall prevention device 10. Also, the region A2 does not overlap with the garbage truck 1 during the dumping operation. Thereby, the garbage can be put from the garbage truck 1 into the hopper 5 without the garbage truck 1 coming into contact with the fall prevention device 10.

[0054] When the input of the garbage is completed, in step S04, the operator presses the operation switch to operate the fall prevention device 10 to close the inlet 5a. Note that also in step S04, similar to step S02, the fall prevention device 10 may be automatically operated using a sensor, a camera, or the like. When the fall prevention device 10 returns to the closed position and the operation of the fall prevention device 10 is completed, in step S05, the garbage truck 1 moves forward, and the garbage truck 1 moves away from the hopper 5. Note that a part of the operations in step S02 and step S03 may be performed simultaneously.

[0055] According to the present embodiment, the fall prevention device 10 includes a first lid member 11 that covers the front part of the inlet 5a of the hopper 5, and a drive device 20 that moves the first lid member 11 in the front-rear direction. The drive device 20 moves the first lid member 11 rearward when opening the inlet 5a, and moves the first lid member 11 forward when covering the inlet 5a. Thereby, even if the fall prevention device 10 is operated after the garbage truck 1 stops at the input position, the first lid member 11 and the garbage truck 1 are less likely to come into contact with each other.

[0056] The dustcart 1 feeds dust from the front of the hopper 5. Therefore, the dust discharged from the dustcart mainly enters the hopper 5 through the front side of the inlet 5a. According to this embodiment, when opening the inlet 5a, since the first lid member 11 moves rearward, it is difficult for the first lid member 11 to come into contact with the dust entering the hopper 5. As a result, the fall prevention device 10 is less likely to be damaged.

[0057] According to this embodiment, when the first lid member 11 covers the inlet 5a, the first lid member 11 is provided so as to be horizontal. Thereby, the dustcart 1 can be stopped at a position where the rear part of the dustcart 1 protrudes into the hopper 5, and dust can be surely fed into the hopper 5.

[0058] According to this embodiment, the fall prevention device 10 includes a guide rail 19 provided on the side of the first lid member 11 and a second lid member 15 provided behind the first lid member 11. The first lid member 11 includes a first frame 12, a first net 13 fixed to the first frame 12, and a roller 14 provided on the first frame 12 and slidably provided on the guide rail 19. The second lid member 15 includes a second frame 16, a second net 17 fixed to the second frame 16, and a pin 18 provided at the front end of the second frame 16 for rotatably supporting the first frame 12 with respect to the second frame 16. When opening the inlet 5a, the drive device 20 rotates the second frame 16 upward about the rear end of the second frame 16. As a result, the first frame 12 rotates downward about the pin 18 while moving rearward. Therefore, it is difficult for the first lid member 11 to come into contact with the dustcart 1 stopped at the loading position during the operation of the fall prevention device 10. Further, since the first lid member 11 is inclined downward as it moves forward, even if dust accumulates on the first lid member 11, the dust can be dropped into the hopper 5.

[0059] Since the dustcart 1 feeds dust from the front of the hopper 5, dust tends to accumulate on the front side of the hopper 5. According to this embodiment, since the roller 14 is disposed rearward of the front end portion of the first frame 12, when opening the inlet 5a, the front end portion of the first frame 12 moves downward and rearward. Thereby, the dust accumulated on the front side of the hopper 5 by the first frame 12 can be scraped rearward. Therefore, the dust accumulated in the hopper 5 can be evenly distributed between the front side and the rear side.

[0060] According to this embodiment, a caution display portion 25 is provided on the upper surface of the first frame 12. When opening the inlet 5a, since the first frame 12 rotates downward about the rear end portion of the first frame 12, the upper surface of the first frame 12 faces forward. Therefore, when the inlet 5a is open, the operator can easily visually recognize the upper surface of the first frame 12 from the front of the hopper 5. Thereby, it is possible to alert the operator that the inlet 5a is open.

[0061] <Second Embodiment> Next, the fall prevention device 10A according to the second embodiment will be described. In the description of the second embodiment, members having the same functions as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and overlapping descriptions are omitted or simplified.

[0062] As shown in FIGS. 10 and 11, the fall prevention device 10A includes a first lid member 11, a guide rail 19A, a roller 14, and a drive device 20. The first lid member 11 includes a frame 12 and a net 13. The outer shape of the frame 12 is rectangular and is formed in a lattice shape. The net 13 is provided on the upper surface of the frame 12 and is fixed to the frame 12. The roller 14 is provided on both side portions of the frame 12 via a shaft 14a. In the front-rear direction, a pair of left and right rollers 14 are provided on the front side of the center of the frame 12, and a pair of left and right rollers 14 are provided on the rear side of the center of the frame 12.

[0063] Guide rails 19A are provided on the left and right sides of the frame 12. The roller 14 is provided so as to roll with respect to the guide rail 19A. The guide rail 19A includes a front guide rail 19Aa and a rear guide rail 19Ab. The front guide rail 19Aa extends in the front-rear direction. The rear guide rail 19Ab is connected to the rear end portion of the front guide rail 19Aa. The rear guide rail 19Ab extends in the vertical direction. The drive device 20 is provided on the frame 12 and is connected to the roller 14. By rotating the roller 14 by the drive device 20, the frame 12 can move along the guide rail 19A.

[0064] When the fall prevention device 10A is in the closed position, the frame 12 and the net 13 are provided horizontally and cover the front side of the inlet 5a of the hopper 5. When opening the inlet 5a, the drive device 20 drives the roller 14 to move the frame 12 backward. When the roller 14 rolls on the front guide rail 19Aa, the frame 12 moves backward. When the roller 14 starts to roll on the rear guide rail 19Ab, the frame 12 moves upward along the rear guide rail 19Ab. As shown by the two-dot chain line in FIG. 10, when the fall prevention device 10A is in the open position, the frame 12 is in a state of extending in the vertical direction. Similar to the first embodiment, when the fall prevention device 10A is in the open position, the first lid member 11 of the fall prevention device 10A is located in a region (region A2) occupying the rear side above the hopper 5. Thereby, the dust and the dust truck parked in front of the hopper 5 can be prevented from contacting the hopper 5 through the region (region A1) occupied by the fall prevention device 10A on the front side above the hopper 5, and the dust can be put into the hopper 5. Note that the illustration of regions A1 and A2 in FIGS. 10 and 11 is omitted.

[0065] According to the present embodiment, when the inlet 5a is open, the fall prevention device 10 is configured such that the frame 12 extends in the vertical direction. Thereby, even if dust rides on the frame 12, the dust can be dropped into the hopper 5.

[0066] Further, as shown in FIGS. 10 and 11, a caution display portion 25 may be provided on the upper surface of the frame 12. When opening the insertion port 5a, the frame 12 moves upward, and the upper surface of the frame 12 faces forward. Therefore, when the insertion port 5a is open, the operator can easily visually recognize the upper surface of the frame 12, and can easily visually recognize the caution display portion 25. Thereby, when the insertion port 5a is open, it is possible to give a caution to the operator.

[0067] <Third Embodiment> Next, the fall prevention device 10B according to the third embodiment will be described. In the description of the third embodiment, members having the same functions as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and overlapping descriptions are omitted or simplified.

[0068] As shown in FIGS. 12 and 13, the fall prevention device 10B includes a first lid member 11, rollers 14, guide rails 19, and a drive device 20. The first lid member 11 includes a frame 12 and a net 13. The outer shape of the frame 12 is rectangular and is formed in a lattice shape. The net 13 is provided on the upper surface of the frame 12 and is fixed to the frame 12. The rollers 14 are provided on both side portions of the frame 12 via shafts 14a. In the front-rear direction, a pair of left and right rollers 14 are provided on the front side of the center of the frame 12, and a pair of left and right rollers 14 are provided on the rear side of the center of the frame 12.

[0069] Guide rails 19 are provided on the left and right sides of the frame 12. The guide rails 19 extend in the front-rear direction. The drive device 20 is provided on the frame 12 and is connected to the rollers 14. By rotating the rollers 14 by the drive device 20, the frame 12 can move in the front-rear direction along the guide rails 19.

[0070] When the fall prevention device 10B is in the closed position, the frame 12 and the net 13 are provided horizontally and cover the front side of the inlet 5a of the hopper 5. When opening the inlet 5a, the drive device 20 drives the roller 14 to move the frame 12 backward. As a result, the frame 12 moves backward along the guide rail 19. As shown by the two-dot chain line in Fig. 12, when the fall prevention device 10 is in the open position, the frame 12 covers the rear side of the inlet 5a. Similar to the first embodiment, when the fall prevention device 10A is in the open position, the first lid member 11 of the fall prevention device 10B is located in the area (area A2) occupying the rear side above the hopper 5. Thereby, the fall prevention device 10B can be inserted into the hopper 5 without contacting the dust and dirt introduced into the hopper 5 through the area (area A1) occupying the front side above the hopper 5 and the dustcart parked in front of the hopper 5. Note that the illustration of areas A1 and A2 in Figs. 12 and 13 is omitted.

[0071] According to the present embodiment, the fall prevention device 10B includes a frame 12, a guide rail 19 extending in the front-rear direction, a net 13 fixed to the frame 12, and rollers 14 provided on both side portions of the frame 12 and configured to roll on the guide rail 19. Thereby, the second lid member 15 is not provided, the configuration of the guide rail 19 can be simplified, and the configuration of the fall prevention device 10B can be simplified.

[0072] <Fourth Embodiment> Next, the fall prevention device 10C according to the fourth embodiment will be described. In the description of the fourth embodiment, members having the same functions as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant descriptions are omitted or simplified.

[0073] As shown in FIGS. 14 and 15, the fall prevention device 10C includes a first lid member 11, a guide rail 19, a drive device 20, and a winding shaft 21. In the present embodiment, the first lid member 11 is a net 13. Note that a slat or the like may be used as the first lid member 11 instead of the net 13. The left and right ends of the net 13 are engaged with the guide rail 19. The guide rail 19 in the present embodiment is formed in a substantially L shape with the rear portion extending in the vertical direction. However, the shape of the guide rail 19 is not limited to this, and it may simply be a shape that extends only in the front-rear direction.

[0074] The winding shaft 21 is a shaft around which the net 13 is wound and extends in the left-right direction. The winding shaft 21 is connected to the rear end portion of the net 13. The drive device 20 is connected to the winding shaft 21. The drive device 20 rotates the winding shaft 21 about an axis parallel to the left-right direction. Thereby, the drive device 20 can wind the net 13 around the rear end portion of the net 13. As shown in FIG. 16, when opening the inlet 5a, the drive device 20 winds the net 13 around the rear end portion of the net 13. Similar to the first embodiment, when the fall prevention device 10A is in the open position, the first lid member 11 of the fall prevention device 10C is located in a region (region A2) occupying the rear side above the hopper 5. Thereby, the fall prevention device 10C can be configured without providing a frame 12 or the like, so that the configuration of the fall prevention device 10C can be simplified and the fall prevention device 10 can be lightened. Also, when the inlet 5a is open, since the net 13 is configured to be wound around the rear end portion, the fall prevention device 10C can be provided even if there is not enough space around the hopper 5. The illustration of regions A1 and A2 in FIGS. 14, 15, and 16 is omitted.

[0075] According to the present embodiment, since the fall prevention device 10C can be configured without providing a frame 12 or the like, the configuration of the fall prevention device 10C can be simplified and the fall prevention device 10 can be lightened. Also, when the inlet 5a is open, since the net 13 is configured to be wound around the rear end portion, the fall prevention device 10C can be provided even if there is not enough space around the hopper 5.

[0076] Also, when the guide rail 19 is formed in an L shape as in this embodiment, the fall prevention device 10 may include a warning display unit 25. In this case, as shown in FIG. 14, the warning display unit 25 may be provided on the upper surface of the net 13 that faces upward when the insertion port 5a is closed and faces forward when the insertion port 5a is opened as shown in FIG. 16. When the net 13 is wound to open the insertion port 5a, the warning display unit 25 faces forward, and the operator can easily visually recognize the warning display unit 25. Thereby, a warning can be given to the operator.

[0077] <Fifth Embodiment> Next, the fall prevention device 10D according to the fifth embodiment will be described. In the description of the fifth embodiment, members having the same functions as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and redundant descriptions are omitted or simplified.

[0078] As shown in FIGS. 17 and 18, the fall prevention device 10D includes a nested first lid member 11D and a drive device 20. The first lid member 11D includes a first plate member 22Da, a second plate member 22Db, and a third plate member 22Dc. The first plate member 22Da, the second plate member 22Db, and the third plate member 22Dc are provided horizontally. The first plate member 22Da is disposed in front of the second plate member 22Db, and the second plate member 22Db is disposed in front of the third plate member 22Dc. The length of the second plate member 22Db in the left-right direction is longer than that of the first plate member 22Da, and the length of the third plate member 22Dc in the left-right direction is longer than that of the second plate member 22Db. Also, the thickness of the second plate member 22Db is larger than that of the first plate member 22Da, and the thickness of the third plate member 22Dc is larger than that of the second plate member 22Db.

[0079] The first plate member 22Da is connected to the second plate member 22Db so as to be movable in the front-rear direction. The second plate member 22Db is connected to the third plate member 22Dc so as to be movable in the front-rear direction. The second plate member 22Db and the third plate member 22Dc are formed in a hollow shape. As shown in FIG. 19, the second plate member 22Db can store the first plate member 22Da. Further, the third plate member 22Dc can store the second plate member 22Db.

[0080] The drive device 20 in the present embodiment is a cylinder, and the drive device 20 is connected to the first plate member 22Da. When the drive device 20 moves the first plate member 22Da backward, the first plate member 22Da is stored in the second plate member 22Db. Further, when trying to move the first plate member 22Da backward, the second plate member 22Db also moves backward integrally with the first plate member 22Da. The second plate member 22Db is stored in the third plate member 22Dc. Thereby, the charging port 5a can be opened. Similar to the first embodiment, when the fall prevention device 10A is in the open position, the first lid member 11D of the fall prevention device 10D is located in a region (region A2) occupying the rear side above the hopper 5. Thereby, the dust can be charged into the hopper 5 without contacting the dust charged through the region (region A1) occupying the front side above the hopper 5 by the fall prevention device 10D and the dust truck parked in front of the hopper 5. Note that the illustration of the regions A1 and A2 in FIGS. 17, 18, and 19 is omitted.

[0081] According to the present embodiment, the first lid member 11D includes the first plate member 22Da, the second plate member 22Db, and the third plate member 22Dc. When the charging port 5a is open, the first plate member 22Da is stored in the second plate member 22Db, and the second plate member 22Db is stored in the third plate member 22Dc. Thereby, the fall prevention device 10D can be provided even if there is not enough space around the hopper 5.

[0082] In addition, in this embodiment, the first lid member 11D is composed of three plate members, but the number of plate members is not limited to this. Further, in this embodiment, when opening the inlet 5a, the fall prevention device 10D is configured such that the first plate member 22Da is stored in the second plate member 22Db, and the second plate member 22Db is stored in the third plate member 22Dc. However, the configuration of the fall prevention device 10D is not limited to this. The fall prevention device 10D may be configured such that at least a part of the first plate member 22Da overlaps with the second plate member 22Db and at least a part of the second plate member 22Db overlaps with the third plate member 22Dc when the inlet 5a is open, as viewed from above.

[0083] <Sixth Embodiment> Next, the fall prevention device 10E according to the sixth embodiment will be described. In the description of the sixth embodiment, members having the same functions as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant descriptions are omitted or simplified.

[0084] As shown in FIGS. 20 and 21, the fall prevention device 10E includes a first lid member 11 and a drive device 20. In the present embodiment, the first lid member 11 is an expandable net 13 formed of a material such as nylon, and the drive device 20 is a cylinder 20E. However, the first lid member 11 may be a bellows or the like, and the drive device 20 may be a motor or the like. The rear end portion of the net 13 is fixed to the inner wall on the rear side of the hopper 5. The drive device 20 is connected to the left front end portion and the right front end portion of the net 13. The cylinder 20E is expandable and contractible in the front-rear direction. As shown in FIG. 20, in a state where the charging port 5a is covered, the cylinder 20E is extended and the net 13 is stretched. As shown in FIG. 21, when opening the charging port 5a, the cylinder 20E is expanded and contracted to move the front end portion of the net 13 rearward. Thereby, the charging port 5a is opened. Similar to the first embodiment, when the fall prevention device 10A is in the open position, the first lid member 11 of the fall prevention device 10E is located in a region (region A2) occupying the rear side above the hopper 5. Thereby, the dust and dirt that are thrown into the hopper 5 through the region (region A1) occupying the front side above the hopper 5 by the fall prevention device 10D and the dustcart parked in front of the hopper 5 can be thrown into the hopper 5 without contact. Note that the illustration of regions A1 and A2 in FIGS. 20 and 21 is omitted.

[0085] According to the present embodiment, the first lid member 11 is an expandable net 13, and the drive device 20 is connected to the left front end portion and the right front end portion of the net 13. Thereby, the fall prevention device 10E can be configured without providing a frame 12 or the like, and the configuration of the fall prevention device 10E can be simplified. Further, the fall prevention device 10E can be configured to be lightweight and compact, and the fall prevention device 10E can be provided even if there is not enough space around the hopper 5.

[0086] The fall prevention devices 10 from the first embodiment to the sixth embodiment described above were provided in the hopper 5. However, the fall prevention device 10 can also be applied to dust storage parts other than the hopper 5. For example, it can be applied to the pit 50 as shown in FIG. 22. The pit 50 has an inlet 50a. The garbage truck 1 stops in front of the inlet 50a (on the left side of the paper surface in FIG. 22) and throws the garbage into the pit 50. The garbage discharged from the garbage truck 1 falls along the slope 51 and is stored in the pit 50. The stored garbage is scooped up by a crane 52 provided above the pit 50 and is put into an incinerator or the like.

Explanation of Signs

[0087] 5 Hopper (Garbage Storage Section) 10 Fall Prevention Device 11 First Cover Member 12 First Frame (Frame) 13 First Net (Net) 14 Roller (Engaging Member) 15 Second Cover Member 16 Second Frame 17 Second Net 18 Pin 19 Guide Rail 20 Driving Device 25 Caution Display Section

Claims

1. In a waste treatment facility where waste is input from a waste truck parked in front of a waste storage section with an input port into the waste storage section, a fall prevention device for preventing the fall into the waste storage section, a first lid member covering at least the front part of the input port of the waste storage section; and a driving device for moving the first lid member in the front-rear direction, wherein the driving device moves at least the front end part of the first lid member rearward when opening the input port, and moves at least the front end part of the first lid member forward when covering the input port. A fall prevention device for a waste treatment facility.

2. The first lid member is provided to be horizontal when the first lid member covers the input port. The fall prevention device for a waste treatment facility according to Claim 1.

3. a second lid member provided behind the first lid member and covering the input port; a guide rail provided on the side of the first lid member and extending in the front-rear direction; engaging members provided on both side parts of the first lid member and engaged with the guide rail; and a pin provided at the front end part of the second lid member and rotatably supporting the first lid member with respect to the second lid member. wherein the driving device rotates the second lid member upward about the rear end part of the second lid member when opening the input port. The fall prevention device for a waste treatment facility according to Claim 1.

4. The engaging member is arranged behind the front end part of the first lid member. The fall prevention device for a waste treatment facility according to Claim 3.

5. A warning display part is provided on the upper surface of the rear end part of the first lid member or the lower surface of the front end part of the second lid member. The fall prevention device for a waste treatment facility according to Claim 3.

6. It has a front side portion extending in the front-rear direction and a rear side portion connected to the rear end portion of the front side portion and extending in the up-down direction, a guide rail provided on the side of the first lid member, An engagement member provided on a side portion of the first lid member and engaged with the guide rail, and the fall prevention device for a dust treatment facility according to claim 1.

7. A guide rail provided on the side of the first lid member and extending in the front-rear direction, An engagement member provided on a side portion of the first lid member and engaged with the guide rail, and the fall prevention device for a dust treatment facility according to claim 1.

8. The first lid member includes a net or slats, The drive device winds the net or the slats around the rear end portion of the net or the slats, and the fall prevention device for a dust treatment facility according to claim 1.

9. The first lid member includes a plurality of plate members arranged in the front-rear direction, Among the plate members adjacent to each other, the plate member arranged on the front side is connected to be relatively movable in the front-rear direction with respect to the plate member arranged on the rear side, and the fall prevention device for a dust treatment facility according to claim 1.

10. The first lid member is composed of a telescopic member, The drive device is provided on both side portions of the first lid member and expands and contracts the first lid member, and the fall prevention device according to claim 1.

Images