Bucket for carrying out objects to be crushed

Abstract

To provide a bucket for carrying out objects to be crushed, capable of safely and efficiently carrying out the objects to be crushed generated at a demolition work site.SOLUTION: A bucket 11 for carrying out objects to be crushed, which is loaded with the objects to be crushed (for example, concrete chips) generated by the demolition of a structure, which hang and convey it from the ground of a yard to the deck of a dump truck by using a hanging part 30 for hanging, and discharges the object to be crushed on the deck is provided with a rectangular parallelepiped bucket main body 19 having an upper opening 17 and a bottom opening 18, a pair of right and left bottom plates (20, 20) opening and closing the bottom opening in both directions from the center portion in the right and left directions, a pair of front and rear switching means 21 that switch between a holding state in which the pair of left and right bottom plates are held at a closed position and a holding release state in which the holding is released and the bottom plates can be shifted from the closed position to an open position, and a handle 22 for performing operation for switching the pair of front and rear switching means from the holding state to the holding release state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bucket for transporting crushed material, and more particularly to a bucket for transporting crushed material such as concrete rubble generated at a demolition site. [Background technology]

[0002] The demolition of concrete structures generates a large amount of concrete debris to be crushed. When carrying out the work of removing the concrete debris (so-called debris removal work), the typical procedure is to load the concrete debris into a vessel (transport container) placed on the ground, then lift the vessel and transfer it to the bed of a dump truck (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-81850 Summary of the Invention [Problem to be solved by the invention]

[0004] The work of removing concrete debris is often carried out in narrow spaces, in which case a relatively small vessel that fits the work space is used, and a series of work processes from loading the concrete debris to unloading it is repeated. However, the work of unloading the concrete debris from the vessel is done by operating a crane to drag the vessel and tip it over, which makes the work unstable and dangerous, and it is also difficult to unload the concrete debris to the designated location.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a bucket for transporting crushable objects that can safely and efficiently transport crushable objects generated at a demolition work site. [Means for solving the problem]

[0006] In order to achieve the above object, the crushable material transport bucket of the present invention is a crushable material transport bucket that is loaded with crushable material generated by the demolition of a structure, is hoisted and transported from the ground of a storage area to the loading platform of a dump truck using a hoisting part, and discharges the crushable material onto the loading platform, and is equipped with a rectangular parallelepiped bucket body having an upper opening and a bottom opening, a pair of left and right bottom plates that open and close the bottom opening from the left-right center in both directions, a pair of front and rear switching means that switches between a holding state in which the pair of left and right bottom plates are held in a closed position and a holding release state in which the holding state is released and the bottom plates can be moved from the closed position to the open position, and a handle that operates to switch the pair of front and rear switching means from the holding state to the holding release state, and the pair of left and right bottom plates rotate around axes provided on both the left and right sides of the bottom opening, and pins are provided on both sides of the rotating tip that protrude outward beyond the positions of the front and rear side surfaces of the bucket body, and the switching means and a pair of front and rear brackets that swing in the front-rear direction around axes provided on both front and rear sides of the bucket body and have pin holes through which the pin is inserted and removed by the swinging; and a pair of front and rear link rods that connect the handle and the pair of front and rear brackets in the vertical direction and convert movement of the handle into rotational force of the brackets, wherein the handle has a pair of front and rear arms that rotate in the front-rear direction around axes provided on both front and rear sides of the bucket body and move the pair of front and rear link rods up and down, and an operation bar that connects one end of the pair of front and rear arms that connects the link rods to the other end opposite thereto and extends in the front-rear direction along one left and right side of the bucket body, wherein the pin is inserted into the pin hole at one end of the swing range of the bracket to create the holding state, and when the bracket swings toward the other end as the operation bar moves downward, the pin comes out of the pin hole to create the holding-release state.

[0007] The pin has an inclined surface at the tip that faces diagonally upward, and the bracket contacts the inclined surface of the pin and swings while sliding as the bottom plate rotates from the open position to the closed position, thereby guiding the pin into the pin hole.

[0008] Furthermore, the device is characterized by comprising a bottom plate opening prevention means for holding the pair of left and right bottom plates in an open position that forms an inverted V shape when viewed from the front, where the distance between the pivoting tip ends is shorter than the distance between the pivoting base ends, and wheels that roll on the ground when the bottom plates are moved from the open position to the closed position, and the pins also serve as axles for the wheels.

[0009] In addition, the present invention is characterized by comprising an operation locking means for preventing movement of the handle and disabling the switching operation of the switching means.

[0010] The device is also characterized by including an electric cylinder that presses down the arm to apply a rotational force to the arm. [Effects of the Invention]

[0011] According to the crushable material transport bucket of the present invention, the bottom plate is designed to open to the left and right, and a switching means is used to switch between the closed and open positions. When the bottom plate is held in the closed position, the engagement between the pin and bracket is ensured, providing sufficient strength for hoisting and transporting a full load of crushable materials. Meanwhile, in the released state, the bucket body is kept horizontal, allowing the crushable materials to be discharged to a designated position on the bed of the dump truck. Moreover, the simple handle operation of pushing down the operating bar allows for release of the bucket, which greatly contributes to the safe and efficient transport of crushable materials (debris removal work). [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a front view of a bucket showing an example of the present invention. FIG. [Figure 2] This is also a side view. [Figure 3] FIG. 10 is a view showing the surface of the bottom plate in the closed position. [Figure 4] FIG. 10 is a view showing the underside of the bottom plate in the closed position. [Figure 5] FIG. 10 is a partial cross-sectional front view of the main part of the switching means. [Figure 6] FIG. [Figure 7] FIG. 10 is a front view of the bucket showing the bottom plate held in the open position. [Figure 8] FIG. 10 is a diagram showing the rotation range of the bottom plate. [Figure 9] FIG. [Figure 10] FIG. 10 is a view taken along the arrow XX in FIG. 9. [Figure 11] FIG. 10 is a diagram showing the operation of pouring concrete debris into the bucket. [Figure 12] FIG. 10 is a view showing the state in which the bucket is similarly hoisted and transported and placed on the bed of the dump truck. [Figure 13] FIG. 10 is a diagram showing the operation of discharging concrete debris from the bucket. [Figure 14] This is a diagram showing the same suspended state with the wheels of the bottom plate in contact with the ground. [Figure 15] FIG. 10 is a view showing the hanging state just before the bottom plate reaches the closed position. [Figure 16] FIG. 10 is a view showing the operation of guiding the pin into the pin hole by swinging the bracket. [Figure 17] FIG. 10 is a front view showing a modified example of the bucket. DETAILED DESCRIPTION OF THE INVENTION

[0013] Figures 1 to 17 are views showing the crushable material discharge bucket of the present invention. Figure 1 is a front view of the crushable material discharge bucket (hereinafter simply referred to as the bucket) as seen from the front. Figure 2 is a left side view of the bucket as seen from the left side. Figures 3 and 4 show the bottom plate in the closed position (closed position) when assembled to the bucket body. Here, Figure 3 shows the front surface of the bottom plate (the surface on which concrete rubble is loaded), and Figure 4 shows the back surface (the surface facing the ground in the storage area), and in both figures the bucket body is omitted to make it easier to understand the shape of the bottom plate.

[0014] The bucket 11 is a sturdy metal transport container that is brought to and used at demolition work sites such as buildings. As shown in Figures 11 to 15, it is loaded with concrete debris (material to be crushed) 12 generated by the demolition of a concrete structure, and in this loaded state, it is suspended from the ground 14 of the storage area by four points on lifting ropes 13 and transported to the loading platform 15 of a dump truck, and the concrete debris 12 is discharged from the loading platform 15.

[0015] For example, a small hydraulic excavator 16 is used to load the concrete rubble 12 (Fig. 11). Although not shown, a truck-mounted crane is used for lifting and transporting between the ground 14 of the storage area and the loading platform 15 of the dump truck. The size of the bucket 11 is determined for ease of use, and the inner dimensions are, for example, 1500 mm in front-to-back width, 1500 mm in left-to-right width, and 900 mm in height, for a total length of 2.02 m. 3 It has a content of

[0016] As shown in FIGS. 1 to 10, the bucket 11 is mainly configured with a rectangular parallelepiped bucket body 19 having an upper opening 17 and a bottom opening 18, a pair of left and right bottom plates 20, 20 that open and close the bottom opening 18 from a central portion in the left-right direction in a bilateral manner, a pair of front and rear switching means 21, 21 that switch between a holding state in which the pair of left and right bottom plates 20, 20 are held in a closed position (FIG. 1) and a holding release state in which the holding state is released and the bucket can be moved from the closed position to the open position (FIG. 7), a handle 22 that operates to switch the pair of front and rear switching means 21, 21 from the holding state to the holding release state, and a handle that is operated after operating the handle 22. The device is equipped with a pair of front and rear spring members 23, 23 that return the movement of the handle 22 to its initial position, a pair of left and right bottom plate opening prevention means 24, 24 (Figures 7 and 8) that hold the pair of left and right bottom plates 20, 20 in an open position that forms an inverted V shape in front view, where the distance between the rotation tip ends is shorter than the distance between the rotation base ends, a total of four wheels 25 (see also Figure 14) that are provided on each of the pair of left and right bottom plates 20, 20, two at the front and two at the back, and roll on the ground when the bottom plate 20 is moved from the open position to the closed position, and an operation lock means 26 (Figures 9 and 10) that prevents movement of the handle 22 and makes it impossible to switch the switching operation of the switching means 21.

[0017] The bucket 11 basically has a symmetrical shape in the front-rear and left-right directions, except for the operating system such as the handle 22. Therefore, for each part that is provided in pairs in the front-rear or left-right directions, only one side will be described, and a description of the other side will be omitted.

[0018] The bucket body 19 is formed as a hollow rectangular box with open top and bottom ends, and is made up of a base 28 formed by framing a channel steel 27 with a U-shaped cross section with the open side facing outward, and four side plates 29 aligned with the lower end of the inner surface of the base 28 and arranged facing each other on the front, rear, left and right sides. Four hanging lugs 30 are provided at the upper end of the bucket body 19, corresponding to the four corners of the upper opening 17.

[0019] Guard members 31 are provided at the corners of the base 28 to protect the base end of the bottom plate 20. Reinforcing members such as angle steel 32 are provided on each of the four outer surfaces of the side plates 29, and a pair of front and rear cover members 33, 33 are provided to conceal the switching mechanism 21 from the outside. Forked portions 35 are provided on the undersides of the channel steel 27 on both the left and right sides of the base 28, connecting the pair of left and right bottom plates 20, 20 via pivot shafts (bolts) 34. As shown in FIG. 2, the forked portions 35 are arranged, for example, four on each side, at approximately equal intervals in the front and rear directions. In FIGS. 2 to 4, a pivot axis 34a passing through the center of the pivot shaft 34 is indicated by a dashed line.

[0020] The bottom plate 20 is formed around a rectangular plate 36, which has a surface on which the concrete rubble 12 is loaded and a back surface facing the ground 14 of the storage area. As shown in FIG. 3 and other figures, a pair of front and rear guide plates 37, 37 are attached to both front and rear ends of the front surface, and multiple angle steels 38 are attached between them, each with its top at a predetermined height and extending in the left-right direction (FIG. 7). On the other hand, as shown in FIG. 4 and other figures, square pipes 39 with rectangular cross sections are attached to the back surface, with their open ends protruding forward and backward. These form fork pockets (through holes) when the pair of left and right bottom plates 20, 20 are in the closed position. The fork pockets are components into which the forks of a forklift are inserted when lifting the bucket 11. Furthermore, multiple ribs (flat plates) 40 are attached to both left and right sides of the square pipes 39 for reinforcement. The ends of the ribs 40 are oriented vertically to ensure good cross-sectional performance against vertical bending forces, and their base ends are inserted into the bifurcated portion 35 of the base 28 (FIG. 2). As a result, the pair of left and right bottom plates 20, 20 are assembled so as to be rotatable about the rotation shafts 34, 34 provided on both the left and right sides of the bottom opening 18.

[0021] As shown in FIG. 8 , the bottom plate opening prevention means 24 comprises, for example, a square bar 41 with a rectangular cross section fixed to the inner end of the lower surface of the channel steel 27 and a notch 42 provided in a substantially semicircular region at the base end of the rib 40, centered on the pivot shaft 34. The notch 42 is formed in an arc shape by providing a radius difference such that the radius of the upper arc 40b is smaller than the radius of the lower arc 40a of the semicircular shape, creating space for the square bar 41 to reciprocate as the bottom plate 20 opens and closes. As shown in FIG. 8( a), the square bar 41, which is located at one end 42a of the notch 42 when the bottom plate 20 is closed, moves circumferentially within the notch 42 as the bottom plate 20 opens. When it reaches and abuts the other end 42b of the notch 42, further movement is restricted as shown in FIG. 8( b). In this opening prevention state, the bottom plate 20 is held in the open position at an opening angle θ (e.g., 65 degrees) (FIG. 7).

[0022] As shown in FIG. 6 , pins 43 are provided on both sides of the pivoting tip of the bottom plate 20, protruding outward (to the right in FIG. 6 ) from the front and rear side surfaces (front and rear side plates 29) of the bucket body 19. As shown in FIGS. 3 and 4 , when the pair of left and right bottom plates 20, 20 is in the closed position, four pins 43 are provided, one on the front side and one on the rear side, with two pins 43 adjacent to each other, and the ribs 40 of the bottom plate 20 are arranged in parallel to form the axles of the wheels 25 attached thereto. As shown in FIG. 6 and other figures, the tip of the pin 43 is provided with an inclined surface 43a facing diagonally upward, which is formed by cutting a portion of the material at an angle. The pins 43 and the ribs 40 are welded to each other, so that the pins 43 (inclined surfaces 43a) do not rotate as the wheels 25 rotate.

[0023] The switching means 21 consists of a pair of front and rear brackets provided at the lower part of both front and rear side surfaces of the bucket body 19, in the center in the left-right direction. Specifically, as shown in FIGS. 5 and 6, the switching means 21 has a pair of front and rear brackets 45, 45 that swing in the front-to-back direction (left-to-right direction in FIG. 6) around a swing shaft (pin) 44 provided corresponding to the height of the base 28 and have pin holes 45a for inserting and removing the pin 43 by the swinging, and a pair of front and rear link rods 46, 46 that connect the handle 22 and the pair of front and rear brackets 45, 45 in the vertical direction and convert the movement of the handle 22 into a rotational force of the brackets 45.

[0024] The handle 22 has a pair of front and rear arms 48, 48 that rotate in the vertical direction (in the direction of arrow A in FIG. 5) around pivot shafts (pins) 47 provided on both front and rear sides of the bucket body 19 at mid-height between the side plates 29 to move the pair of front and rear link rods 46, 46 up and down (in the direction of arrow B in FIG. 5), and an operation bar 49 that connects one end of the pair of front and rear arms 48, 48 where the link rods 46 are connected to the other end on the opposite side and extends in the vertical direction along one of the right and left sides (left side) of the bucket body 19 (FIG. 2). The arm 48 and operation bar 49 have hollow cross sections to reduce weight and ensure rigidity; for example, the arm 48 is made of a square pipe and the operation bar 49 is made of a round pipe.

[0025] As shown in Fig. 1, the spring member 23 is a tension spring that is attached between the side plate 29 of the bucket body 19 and the arm 48 via a rod-shaped hook 50, and holds the switching means 21 at its free length (the length when no load is applied by operating the handle). As a result, the operation bar 49 is held at the top of one of the left and right sides (the top of the left side) of the bucket body 19 in the initial position where the operation of pressing down the handle 22 begins, as shown in Figs. 1 and 2. The hook 50 has a screw-fastening structure that can be rotated and moved in the axial direction, and it is possible to adjust the inclination of the handle 22 that is attached via the spring member 23, i.e., the initial position of the handle 22.

[0026] 9 and 10, the operation locking means 26 includes a handle locking portion 51 provided at the upper center of the operation bar 49, a plate piece 52 provided to protrude from the side plate 29 of the bucket body 19, and a plate-shaped hook portion 54 provided on the plate surface (vertical plane) of the plate piece 52 so as to be rotatable around a rotation axis (pin) 53. The handle locking portion 51 is formed by bending a round bar into a generally inverted U shape, and is fixed to the operation bar 49 with a horizontal portion whose tip (upper end) is horizontal. The horizontal portion of the handle locking portion 51 and the lower end of the plate piece 52 are arranged adjacent to each other and overlap each other in the vertical direction when the handle 22 is in the initial position. In addition, an operation knob 54a is provided on the hook portion 54, and a hook portion receiver 52a is provided on the plate piece 52, each protruding from the plate surface.

[0027] The operation locking means 26 thus formed is in a locked state where movement of the operation bar 49 in the pushing direction (the direction of arrow C in FIGS. 9 and 10) is prevented when the hook portion 54 is hanging down (solid line in FIG. 9). That is, the switching operation of the switching means 21 is disabled. On the other hand, when the hook portion 54 is rotated counterclockwise (the direction of arrow D in FIG. 9) by, for example, approximately 270 degrees, and the hook portion 54 is received by the hook portion receiver 52a (imaginary line in FIG. 9), the operation locking means 26 is in an unlocked state where movement of the operation bar 49 in the pushing direction is enabled. That is, the switching operation of the switching means 21 is enabled.

[0028] The link rod 46 is, for example, a link rod with spherical bearings attached to both ends (rod ends), and is connected to a pivot shaft (bolt) 55 at the upper end and a pivot shaft (pin) 56 at the lower end so that it can rotate about the pivot shaft and tilt in any direction within a certain angle relative to the pivot axis. In Figures 5 and 6, the swing axis 44a passing through the center of the swing shaft 44 of the bracket 45 is shown by a dashed dotted line. Furthermore, the swing axes 47a, 55a, and 56a passing through the centers of the swing shafts 47, 55, and 56 of the arm 48 and the link rod 46 are also shown by dashed dotted lines.

[0029] Bracket 45 is formed in an inverted L shape consisting of upper horizontal portion 45b and hanging portion 45c, with a cylindrical body 45d extending in the left-right direction provided at the inner corner of the inverted L shape. Pivot shaft 44 penetrates a pair of left and right mounting arms 57, 57 attached to channel steel 27 and the cylindrical body 45d positioned therebetween, supporting bracket 45 so that it can swing back and forth. Two pin holes 45a are provided horizontally at the lower end of hanging portion 45c, through which two adjacent left and right pins 43, 43 are inserted together when bottom plates 20, 20 are closed. A bifurcated connecting portion 45e is provided on the upper surface of upper horizontal portion 45b, to which the lower end of link rod 46 is connected via pivot shaft 56. The pivot shaft 56 is positioned at an outer position opposite the inner position where the hanging portion 45c is positioned relative to the swing shaft 44. As a result, when the link rod 46 moves up and down, the force acts as a rotational force (rotational moment) around the swing shaft 44, and as a result, the bracket 45 swings in the front-to-back direction (the direction of arrow E in Figure 6) around the swing shaft 44.

[0030] In this way, when the bracket 45 is at one end position (solid line in Figure 6) of the swing range defined by the initial position of the handle 22, the pin 43 is inserted into the pin hole 45a, creating a holding state (an engaged state between the pin 43 and the bracket 45), and as the link rod 46 moves upward in conjunction with the downward movement of the operating bar 49, i.e., as the switching means 21 switches, the bracket 45 swings toward the other end (imaginary line in Figure 6), and the pin 43 comes out of the pin hole 45a, creating a released state (a disengaged state between the pin 43 and the bracket 45).

[0031] When the bucket 11 thus formed is used to transport concrete rubble 12 from a construction site, the bucket 11 is placed on the ground 14 of a storage area, and a hydraulic excavator 16 is used to dump the concrete rubble 12 into the bucket 11, as shown in Fig. 11. Then, when the bucket 11 is fully loaded with concrete rubble 12, the lifting ropes 13 are hung on the four lifting lugs 30, and the bucket is hoisted from the ground 14 to the loading platform 15 of a dump truck using the four-point lifting of the lifting ropes 13, as shown in Fig. 12.

[0032] Here, for safety reasons, the worker confirms that bucket 11 is placed on platform 15, then unlocks operation locking means 26 and presses down handle 22, which is in the initial position, to perform the switching operation of switching means 21. At this time, in switching means 21, as bracket 45 swings, four pins 43 of bottom plate 20 simultaneously come out of pin holes 45a, resulting in a release state (a state in which pins 43 and bracket 45 are disengaged).

[0033] When the crane is hoisted in this released state, bucket 11 rises and bottom plates 20, 20 gradually begin to open, causing pin 43 and pin hole 45a to move away from each other in the vertical direction. Here, when handle 22 is released, spring member 23 elastically returns to its original position, but even when handle 22 is returned to its initial position, in other words, when bracket 45 is swung back in the opposite direction, pin 43 will not be inserted into pin hole 45a, and the released state will be maintained.

[0034] In this way, when the bottom plates 20, 20 move from the closed position to the open position, the concrete rubble 12 discharged from the bottom opening 18 of the bucket body 19 is guided to the center below the bucket body 19 by the rectifying action of the guide plate 37 on the surface of the bottom plate 20 and the angle irons 38, as shown in Figure 13. Meanwhile, the bucket 11 maintains a stable, horizontally suspended state because the center of gravity of the concrete rubble 12 does not shift left or right. This prevents danger to the feet of an operator standing on one side of the bucket 11 (the side with the handle 22), allowing the work of discharging the concrete rubble 12 to be carried out safely.

[0035] When the empty bucket 11 is hoisted and transported from the loading platform 15 to the ground 14, the bottom plates 20, 20 hang down under their own weight, forming an inverted V shape and held in the open position (see FIG. 7). When the crane is lowered to lower the bucket 11, the four wheels 25 first touch the ground, as shown in FIG. 14, and the center of gravity of the bottom plates 20, 20 is located on the left and right outside of this contact point. Therefore, the bucket 11 descends while rolling the wheels 25 on the ground, stabilizing its movement and allowing the bottom plates 20, 20 to smoothly transition from the open position to the closed position.

[0036] As shown in Fig. 15, when the opening angle θ of bottom plates 20, 20 during rotation from the open position to the closed position approaches, for example, around 3 degrees, that is, just before the closed position, as shown in Fig. 16(a), bracket 45 swings while its lower end (the lower end of hanging portion 45c) abuts on inclined surface 43a of pin 43 and slides, guiding pin 43 into pin hole 45a as shown in Fig. 16(b). That is, a horizontal component of the upward force of pin 43 generated by inclined surface 43a acts on bracket 45, causing it to swing outward (in the direction of arrow F in Fig. 16(b)) around swing shaft 44.

[0037] When the tips of the pins 43 reach the pin holes 45a, the bracket 45 is released from the upward pushing force of the pins 43 and swings inward (in the direction of arrow G in FIG. 16(c)) around the swing shaft 44, as shown in FIG. 16(c). At this time, in the switching means 21, as the bracket 45 swings, the four pins 43 of the bottom plate 20 are simultaneously inserted into the pin holes 45a, resulting in a holding state (a state in which the pins 43 and the bracket 45 are engaged). Note that when the holding state is established, the spring member 23 is pulled, but the resulting elastic force is small, and the operating noise of the moving part is kept to a minimum.

[0038] The operation locking means 26 of the bucket 11 placed on the ground 14 of the yard is locked, ensuring safety by preventing inadvertent handle operation. Then, at the construction site, the work of dumping concrete rubble 12 into the bucket 11 resumes, as shown in Figure 11. In this way, the concrete rubble 12 is transported from the construction site by repeatedly hoisting and transporting the concrete rubble 12 between the ground 14 of the yard and the loading platform 15 of the dump truck.

[0039] As described above, according to the crushable material discharge bucket 11 of the present invention, the bottom plates 20, 20 are configured to open to the left and right, and a switching means 21 is used to switch between the closed and open holding states, so that when the bottom plates 20, 20 are held in the closed position, the engagement between the pins 43 and the brackets 45 is ensured, providing sufficient strength required for hoisting and transporting a full load of crushable materials 12, while in the released state, the bucket body 19 is kept horizontal and the crushable materials 12 can be discharged to a predetermined position on the bed 15 of the dump truck. Moreover, the holding can be released by a simple handle operation of simply pushing down the operation bar 49, which greatly contributes to the safe and efficient transport work (debris removal work) of the crushable materials 12.

[0040] Furthermore, as the bottom plate 20 pivots from the open position to the closed position, the bracket 45 contacts the inclined surface 43a of the pin 43 and slides to guide the pin 43 into the pin hole 45a. This allows the bucket 11 to be re-established in a holding state simply by placing it on the ground 14. Furthermore, the bucket 11 includes a bottom plate opening prevention mechanism 24 that holds the pair of left and right bottom plates 20, 20 in the open position, which forms an inverted V-shape in front view, and wheels 25 that roll on the ground 14 when the bottom plate 20 is moved from the open position to the closed position, contributing to smooth operation of the bottom plate 20. In particular, the pin 43 doubles as the axle for the wheels 25, providing superior versatility (component standardization). Additionally, the bucket 11 includes an operation lock mechanism 26 that prevents movement of the handle 22 and disables the switching operation of the switching mechanism 21, contributing to safety.

[0041] 17 shows a modified example of the crushable object discharge bucket of the present invention. In the following description, the same components as those shown in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

[0042] This modified example has the same configuration as the above-described embodiment. The bucket 58 is equipped with an electric cylinder 59 that presses down on the arm 48 to apply a rotational force to the arm 48. The electric cylinder 59 is provided alongside the spring member 23 on one of the front and rear sides (front side) of the bucket body 19, and has a rod 59b as a pressing section that protrudes from the tip (lower end) of a device body 59a equipped with a drive section. In addition, a control panel (not shown) that controls the operation of the electric cylinder 59 is provided on the other front or rear side (rear side) of the bucket body 19, and is configured to allow remote operation using a wireless communication module built into the control panel.

[0043] This modified example configured in this manner can also achieve the same effects as the above-described configuration, and furthermore, in this modified example, the electric cylinder 59 can be used to power the operation of pressing down the handle 22, thereby further improving work efficiency and safety.

[0044] The present invention is not limited to the above-described embodiment, and the shape, size (external dimensions), and components of the bucket can be modified as appropriate depending on the site of use. For example, a simple configuration may be used without spring members or wheels. In this case, a balance weight that makes it easy to return the handle to its initial position may be added, or a rounded, curved member that reduces the surface pressure on the contact area of the bottom plate may be added. The arrangement of the components is also arbitrary. Furthermore, while the material to be crushed in the embodiment is concrete rubble, it is not limited to this and may include various construction waste materials and industrial waste, such as crushed stone or brick, and scrap metal. [Explanation of symbols]

[0045] 11...Bucket for transporting crushed material, 12...Concrete rubble (crushed material), 13...Lifting rope, 14...Ground, 15...Loading platform, 16...Hydraulic excavator, 17...Upper opening, 18...Bottom opening, 19...Bucket body, 20...Bottom plate, 21...Switching means, 22...Handle, 23...Spring member, 24...Bottom plate opening prevention means, 25...Wheels, 26...Operation locking means, 27...Channel steel, 28...Base, 29...Side plate, 30...Lifting ear, 31...Guard member, 32...Angle steel, 33...Cover member, 34...Pivoting shaft, 34a...Pivoting axis line, 35...Bifurcation portion, 36...Plate body, 37...Guide plate, 38...Angle steel, 39...Square pipe, 40...Rib, 41...Square bar, 42 ...Notch, 42a...One end, 42b...Other end, 43...Pin, 43a...Inclined surface, 44...Swing shaft, 44a...Swing axis, 45...Bracket, 45a...Pin hole, 45b...Upper horizontal portion, 45c...Suspended portion, 45d...Cylinder, 45e...Connecting portion, 46...Link rod, 47...Pivoting shaft, 47a...Pivoting axis, 48...Arm, 49...Operation bar, 50...Hook, 51...Handle locking portion, 52...Plate piece, 52a...Hanging portion receiver, 53...Rotating shaft, 54...Hanging portion, 54a...Operation knob, 55...Pivoting shaft, 55a...Pivoting axis, 56...Pivoting shaft, 56a...Pivoting axis, 57...Mounting arm, 58...Bucket for transporting crushed material, 59...Electric cylinder, 59a...Device body, 59b...Rod

Claims

1. A crushable material discharge bucket is loaded with crushable materials generated by the demolition of a structure, and is lifted and transported from the ground of a storage area to the loading platform of a dump truck using a lifting part for lifting, and the crushable materials are discharged from the loading platform, a rectangular parallelepiped bucket body having an upper opening and a bottom opening; a pair of left and right bottom plates that open and close the bottom opening from a center portion in the left-right direction; a pair of front and rear switching means for switching between a holding state in which the pair of left and right bottom plates are held in a closed position and a holding release state in which the holding state is released and the pair of left and right bottom plates can be moved from the closed position to an open position; a handle for operating the pair of front and rear switching means to switch from the holding state to the holding release state, The pair of left and right bottom plates rotate around axes provided on both left and right sides of the bottom opening, and pins are provided on both sides of the rotation tip ends thereof, protruding outward beyond the positions of both front and rear side surfaces of the bucket body, The switching means a pair of front and rear brackets that swing in the front-rear direction about axes provided on both front and rear sides of the bucket body and have pin holes through which the pins are inserted and removed; a pair of front and rear link rods that connect the handle and the pair of front and rear brackets in the vertical direction and convert movement of the handle into rotational force of the brackets, The handle is a pair of front and rear arms that rotate in the vertical direction around shafts provided on both front and rear sides of the bucket body to move the pair of front and rear link rods up and down; an operation bar connecting the ends of the pair of front and rear arms, where the link rods are connected, to the other ends on the opposite side, and extending in the front-rear direction along one of the left and right sides of the bucket body; The bucket for transporting crushed material is characterized in that the pin is inserted into the pin hole at one end of the swing range to create the holding state, and when the bracket swings toward the other end as the operating bar moves downward, the pin comes out of the pin hole to create the holding release state.

2. The pin has a tip end provided with an inclined surface facing diagonally upward, 2. A bucket for transporting crushed material as described in claim 1, characterized in that the bracket abuts against the inclined surface of the pin and swings while sliding during the rotation of the bottom plate from the open position to the closed position, guiding the pin into the pin hole.

3. a bottom plate opening prevention means for holding the pair of left and right bottom plates in an open position in which the distance between the rotation tip ends is shorter than the distance between the rotation base ends and forms an inverted V shape in a front view; and wheels for rolling on the ground when the bottom plates are moved from the open position to the closed position, 3. The crushable material carrying bucket according to claim 1, wherein the pins also serve as axles for the wheels.

4. 3. The crushable material carrying bucket according to claim 1, further comprising an operation locking means for preventing movement of the handle to disable the switching operation of the switching means.

5. 3. The crushable material carrying bucket according to claim 1, further comprising an electric cylinder for pushing down the arm to apply a rotational force to the arm.

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