JP6692276B2 - Support structure and method for placing bottom-opening bucket on hopper - Google Patents

Description

  The present invention relates to a structure for supporting a bottom opening bucket by a hopper, and a method for mounting the bottom opening bucket on a hopper.

  Conventionally, it has been known to carry out earth and sand such as excavated soil in a vertical shaft at a construction site using a bottom-opening bucket. Patent Document 1 discloses an example of such a bucket. In Patent Document 1, by using a main wire and an auxiliary wire that can suspend the main body of the bucket, by loosening the tension of the main wire while maintaining the tension of the auxiliary wire, the bottom lid of the bucket is opened. The soil in the bucket is dropped outside the bucket.

Utility model registration No. 3072339

  By the way, in order to open the bottom lid of the bottom-opening type bucket and discharge the earth and sand in the bucket to the outside of the bucket, for example, a gantry shown in FIG. 15 is used. Here, FIGS. 15A and 15B are a front view and a side view of a gantry on which the bottom-opening bucket is placed.

  A pedestal 100 shown in FIG. 15 includes four columns 101 that stand on the ground, an inclined plate 102 that inclines downward from the rear to the front, a pair of left and right beams 103 that extend in the front-rear direction, and a left-right direction. It has a pair of front and rear beams 104 extending in the direction of and a stopper member 105. The stopper member 105 is provided on the front beam 104 and extends in the left-right direction.

  FIG. 16 illustrates a method of mounting the rectangular box-shaped bottom opening bucket 110 on the pedestal 100. In the method of mounting the bucket 110 on the gantry 100, first, as shown in FIG. 16A, one corner of the bucket 110 suspended by a crane (not shown) is brought into contact with the stopper member 105. Next, as shown in FIG. 16B, the direction of the bucket 110 is adjusted by a crane operation performed by an operator while one corner of the bucket 110 is being brought into contact with the stopper member 105, and FIG. As shown in, the bucket 110 is placed at a predetermined position on the gantry 100. Here, in order to open the bottom lid of the bucket 110 and discharge the earth and sand in the bucket 110, the bucket 110 must be placed at the above-mentioned predetermined position on the pedestal 100.

  However, when placing the bucket 110 on the pedestal 100, the work of adjusting the orientation of the bucket 110 by the crane operation using the stopper member 105 as described above requires time and labor. Further, when an interposition rope is used for the orientation adjustment, a worker may intervene near the lower portion of the bucket 110, which is a concern for safety.

  In view of such a situation, an object of the present invention is to efficiently mount a bottom opening type bucket on a hopper and to improve the safety of the mounting work.

Therefore, the support structure in the present invention is a structure for supporting the bottom-opening bucket by the cylindrical hopper having an open upper surface and a lower surface. This support structure includes a projecting portion that projects outward from the outer surface of the bucket, a receiving portion that is provided so as to project inward from the inner peripheral surface of the upper portion of the hopper, and that can support the projecting portion from below, and the hopper. An extension that extends upward from the upper end and expands upward in a funnel shape and has a truncated cone-like tubular shape . The overhanging portion includes a frame portion whose base end portion is fixed to the outer surface of the bucket, and a plurality of wheels provided at the tip end portion of the frame portion. The wheels can roll on the inner peripheral surface of the extension with the bottom of the bucket closed.

The method for mounting the bottom-opening bucket on the hopper in the present invention is a method for mounting the bucket on the hopper in the support structure .

The mounting method of the hopper of the onset definitive bright bottom open type bucket, to move the bucket in a state where the bottom is closed to above the extension, while abutting the wheel on the inner peripheral surface of the extension portion, a bottom portion The bucket in the closed state is lowered to a position where the projecting portion is supported from below by the receiving portion.

  According to the present invention, the hopper has a cylindrical shape, and the receiving portion is provided so as to project inward from the inner peripheral surface of the upper portion thereof. The overhanging portion of the bottom-opening bucket can be placed on the receiving portion. Therefore, it is possible to lower the bucket as it is and place it on the receiving part via the overhanging part, regardless of the direction of the bucket (yawing direction) suspended by a crane or the like. it can. Therefore, the bucket orientation adjustment work can be omitted, and the bucket can be efficiently placed on the hopper. Further, since it is not necessary to adjust the orientation of the bucket using an interposition rope or the like, it is possible to improve the safety of the mounting work.

The top view which shows the earth and sand carrying-out method in 1st Embodiment of this invention. A vertical cross-sectional view showing a method for carrying out sediment according to the embodiment. A perspective view of a hopper and a gantry in the same embodiment A plan view of a bottom opening type bucket in the above embodiment AA sectional view of FIG. The figure which shows the opening / closing state of the bottom part of the bottom opening type bucket in embodiment same as the above. The top view which shows the state in which the bottom opening type bucket in embodiment same as the above was mounted in the hopper. A vertical cross-sectional view showing a state in which the bottom-opening bucket according to the above embodiment is placed on a hopper. The figure which shows the mounting method in the hopper of the bottom opening type bucket in embodiment same as the above. The figure which shows the mounting method in the hopper of the bottom opening type bucket in embodiment same as the above. The figure which shows the mounting method in the hopper of the bottom opening type bucket in embodiment same as the above. The figure which shows the mounting method in the hopper of the bottom opening type bucket in embodiment same as the above. Enlarged view of the overhang portion in the second embodiment of the present invention Enlarged view of the overhanging portion in the third embodiment of the present invention Diagram showing the pedestal on which the bottom-opening bucket is placed Diagram showing how to place a bottom-opening bucket on a pedestal

Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 are a plan view and a vertical cross-sectional view showing a method for carrying out earth and sand in a first embodiment of the present invention. In the present embodiment, the bottom opening type bucket (hereinafter, simply referred to as “bucket”) 1 will be described below as accommodating earth and sand (excavation shear) such as excavated soil generated when the shaft 200 is constructed. What is stored in 1 is not limited to earth and sand.

  Sediment such as excavated soil generated when constructing the vertical shaft 200 is stored in the bucket 1 by using the backhoe 201 arranged in the vertical shaft 200. The bucket 1 containing the earth and sand is hoisted by the crawler crane 202 on the ground via the hoisting tool 2 and moves to just above the hopper 3 on the ground. Here, the hopper 3 is supported by a gantry 4 on the ground. After the bucket 1 is moved to just above the hopper 3, the suspending tool 2 is lowered to lower the bucket 1, and the projecting portions 13a and 13b of the bucket 1 are placed on the receiving portion 32 of the hopper 3. After that, by further lowering the hanging tool 2, the bottom plates 11a and 11b of the bucket 1 are opened, and the earth and sand in the bucket 1 are carried out through the hopper 3 to the earth and sand temporary storage area 203. The earth and sand carried out to the earth and sand temporary storage area 203 can be loaded on the dump truck 205 using the backhoe 204 and the like, and can be carried out to the outside by the dump truck 205.

FIG. 3 is a perspective view of the hopper 3 and the gantry 4 in this embodiment.
The gantry 4 is composed of four columns 41 standing on the ground, four beams 42 arranged in a rectangular shape in plan view, and an inclined plate 43. The upper ends of the columns 41 are connected to both ends of each beam 42. The inclined plate 43 is inclined downward as it approaches the temporary earth and sand storage area 203.

A cylindrical hopper 3 is attached to the gantry 4 so as to penetrate an upper surface opening (a portion surrounded by the four beams 42) of the gantry 4. Therefore, the hopper 3 is supported by the gantry 4. The hopper 3 extends in the vertical direction and has an upper surface and a lower surface opened. An inclined plate 43 is located just below the hopper 3.
The extension portion 30 is formed by extending upward from the upper end portion 31 of the hopper 3. The extension portion 30 has a funnel-shaped diameter that increases upward (see FIGS. 7 and 8 described later).

A receiving portion 32 is provided on the upper portion (upper end portion 31 in the present embodiment) of the hopper 3 so as to project radially inward from the inner peripheral surface thereof. The receiving portion 32 is provided over the entire circumference of the hopper 3, and has an annular shape in a plan view. In addition, in the present embodiment, the receiving portion 32 is provided over the entire circumference of the hopper 3. However, in addition to this, the receiving portion 32 is configured by a plurality of arc-shaped members, and the arc-shaped members are arranged in the circumferential direction of the hopper 3. They may be arranged at intervals.
The receiving portion 32 can support the projecting portions 13a and 13b provided on the bucket 1 from below.

  FIG. 4 is a plan view of the bucket 1. FIG. 5 is a sectional view taken along line AA of FIG. 6 (a) and 6 (b) correspond to the BB arrow of FIG. 5, FIG. 6 (a) shows the case where the bottom portion of the bucket 1 is in the closed state, and FIG. 6 (b) is The case where the bottom part of the bucket 1 is an open state is shown. 7 and 8 are a plan view and a vertical sectional view showing a state where the bucket 1 is placed on the hopper 3. In FIG. 7, the hanger 2 is not shown for simplicity of illustration.

  The bucket 1 has a rectangular box-shaped bucket body 10 having an open top and bottom. The bucket body 10 has a pair of left and right short side surfaces 10a and 10b and a pair of front and rear long side surfaces 10c and 10d. In the present embodiment, in the bucket body 10, the long side surface 10c is the front surface (front surface), the long side surface 10d is the back surface (rear surface), and the direction connecting the pair of long side surfaces is the front-rear direction and the short side surface 10a is short. The direction connecting the side surface 10b is called the left-right direction.

  The bucket 1 has a pair of front and rear bottom plates 11a and 11b pivotably supported on the bottom of the bucket body 10 so as to be openable and closable. The front end of the bottom plate 11a on the front side is pivotally supported by the front end of the bottom of the bucket body 10 via a pivot shaft 12a. A rear end of the bottom plate 11b on the rear side is pivotally supported by a rear end of the bottom of the bucket body 10 via a pivot shaft 12b.

An opening / closing mechanism 15 for opening / closing the bottom plates 11a, 11b is provided on the short side surfaces 10a, 10b of the bucket body 10. The opening / closing mechanism 15 includes an elevating plate 16, a guide member 17, and link members 18a and 18b.
The elevating plate 16 is slidable in the vertical direction outside the short side surfaces 10a, 10b along the short side surfaces 10a, 10b. The guide member 17 guides the vertical slide of the elevating plate 16, and is formed of, for example, chevron steel and extends in the vertical direction.

The link members 18a and 18b connect the elevating plate 16 and the bottom plates 11a and 11b. The upper ends of the link members 18a and 18b are pivotally supported by the elevating plate 16 via pins 19. The lower end of the link member 18a is pivotally supported on the rear portion of the bottom plate 11a via a pin 20a. The lower end of the link member 18b is pivotally supported by the front portion of the bottom plate 11b via a pin 20b.
A stopper member 21 is provided at the bottom of the short side surfaces 10a and 10b of the bucket body 10, and the stopper member 21 prevents the elevator plate 16 from being excessively lowered.

  Therefore, when the lift plate 16 is located at the uppermost position shown in FIG. 6A, the bottom plates 11a and 11b of the bucket 1 close the bottom opening of the bucket body 10 (that is, the bottom of the bucket 1 is closed). Will be). Further, as the lift plate 16 moves downward with respect to the short side surfaces 10a and 10b, the bottom plates 11a and 11b of the bucket 1 open (that is, the bottom portion of the bucket 1 opens), and the bucket body 10 moves. The opening of the bottom opening becomes large. Then, when the lift plate 16 is located at the lowest position shown in FIG. 6B, the opening degree of the bottom surface opening of the bucket body 10 becomes maximum.

  Therefore, the downward movement of the elevating plate 16 with respect to the short side surfaces 10a, 10b corresponds to the opening operation of the bottom plates 11a, 11b of the bucket 1. Further, the ascending movement of the elevating plate 16 with respect to the short side surfaces 10a, 10b corresponds to the closing operation of the bottom plates 11a, 11b of the bucket 1.

  A hanging portion 22 is provided on the outer surface of the elevating plate 16. The hanging portion 22 is formed of a plate-shaped member having a through hole 22a.

  The bucket 1 (bucket body 10) is provided with overhanging portions 13a and 13b. The projecting portion 13a projects to the left (outward) from the left side surface of the bucket 1 (bucket body 10). The projecting portion 13b projects to the right (outward) from the right side surface of the bucket 1 (bucket body 10).

The overhanging portion 13a includes a frame portion 23a and a plurality of (three in the present embodiment) wheel units 26a.
The frame portion 23a has a plurality of (four in the present embodiment) beam members whose base end (right end) is fixed to the short side surface 10a (outer surface of the bucket body 10) and extends leftward (outward). 24a, and an arcuate member 25a connected to the tip (left end) of these beam members 24a. Therefore, the frame portion 23a has its base end portion (right end portion) fixed to the short side surface 10a (outer side surface of the bucket body 10) and extends leftward (outward).

The wheel unit 26a described above is attached to the lower surface of the arcuate member 25a. Wheel unit 26a includes wheels 27a.
That is, the wheel unit 26a described above is attached to the tip portion (left end portion) of the frame portion 23a. Wheel unit 26a includes wheels 27a.
The wheel 27 a can roll on the inner peripheral surface of the extension portion 30.

The projecting portion 13b includes a frame portion 23b and a plurality (three in the present embodiment) of wheel units 26b.
The frame portion 23b has a plurality of (four in the present embodiment) beam members whose proximal end (left end) is fixed to the short side surface 10b (outer surface of the bucket body 10) and extends rightward (outward). 24b and an arcuate member 25b connected to the tip portions (right end portions) of these beam members 24b. Therefore, the frame portion 23b has its base end portion (left end portion) fixed to the short side surface 10b (outer side surface of the bucket body 10) and extends rightward (outward).

The aforementioned wheel unit 26b is attached to the lower surface of the arcuate member 25b. Wheel unit 26b includes wheels 27b.
That is, the above-mentioned wheel unit 26b is attached to the tip portion (right end portion) of the frame portion 23b. Wheel unit 26b includes wheels 27b.
The wheel 27b can roll on the inner peripheral surface of the extension portion 30.

The bucket 1 (bucket body 10) has such a size that it can enter the hopper 3 in a plan view (see FIGS. 7 and 8). That is, the horizontal sectional area of the bucket 1 (bucket body 10) is smaller than the horizontal sectional area of the internal space of the hopper 3.
The dimensions of the projecting portions 13a and 13b are appropriately set so that they can be placed on the receiving portion 32.

  As shown in FIG. 8, in the present embodiment, the hanging tool 2 is a hanging balance capable of horizontally hoisting and hanging the bucket 1 via a linear member 51 such as a wire, and a crawler is provided at the center thereof. A hanging portion 52 to which a hook (not shown) of the crane 202 is detachably attached is provided. The locking member 53 provided at the lower end of the linear member 51 of the hanging device 2 is detachably attached to the hanging portion 22 of the lift plate 16 of the bucket 1. Here, the hanging device 2 can be raised and lowered according to the raising and lowering by the crawler crane 202.

  Next, a method of placing the bucket 1 on the hopper 3 will be described with reference to FIGS. 9 to 12. 9 to 12 show a method of placing the bucket 1 on the hopper 3 in this embodiment.

  First, as shown in FIG. 9, in the shaft 200, the bucket 1 is placed on the bottom of the shaft 200 with the bottom of the bucket 1 closed, and the backhoe 201 or the like is used to remove earth and sand such as excavated soil. Stored in bucket 1.

  Next, the locking member 53 provided at the lower end of the linear member 51 of the hanging device 2 is attached to the hanging portion 22 of the lift plate 16 of the bucket 1. Then, the crawler crane 202 lifts the bucket 1 via the lifting tool 2 and moves the bucket 1 from inside the vertical shaft 200 to immediately above the hopper 3 (see FIG. 10). At this time, since the linear member 51 is in a tensioned state, the lifting plate 16 is located at the uppermost position as shown in FIG. 6 (a), and therefore the bottom plates 11a and 11b of the bucket 1 are placed in the bucket body 10. The bottom opening is closed (that is, the bottom of the bucket 1 is closed).

  Next, as shown in FIG. 11, the bucket 1 is lowered by the crawler crane 202 via the suspenders 2. At this time, the wheel 27a of the overhanging portion 13a or the wheel 27b of the overhanging portion 13b may come into contact with the inner peripheral surface of the extension portion 30 and roll. Note that FIG. 11 shows a state in which the wheels 27a of the projecting portion 13a are in contact with the inner peripheral surface of the extension portion 30 and are rolling.

  In this way, while the wheels 27a of the overhanging portion 13a or the wheels 27b of the overhanging portion 13b are brought into contact with the inner peripheral surface of the extension portion 30, the overhanging portions 13a, 13b of the bucket 1 are received from below by the receiving portion 32 of the hopper 3. Lower to a supported position (see Figure 12). In this way, the projecting portions 13a and 13b of the bucket 1 are placed on the receiving portion 32 of the hopper 3.

As shown in FIG. 12, when the projecting portions 13a and 13b of the bucket 1 are placed on the receiving portion 32 of the hopper 3, the horizontal movement of the bucket 1 is restricted by the extension portion 30.
Further, as shown in FIG. 12, in the present embodiment, with the wheels 27a and 27b positioned between the frame portions 23a and 23b of the overhang portions 13a and 13b and the receiving portion 32 of the hopper 3, the receiving portion of the hopper 3 is received. The portion 32 can support the projecting portions 13a and 13b from below. This can prevent the frame portions 23a and 23b of the overhang portions 13a and 13b from coming into contact with the receiving portion 32 of the hopper 3.

  After the projecting portions 13a and 13b of the bucket 1 are placed on the receiving portion 32 of the hopper 3, the hanger 2 is further lowered by the crawler crane 202 to loosen the tension of the linear member 51. The opening operation of the bottom plates 11a and 11b is started by the own weight of the soil and the bottom plates 11a and 11b. That is, as the hanger 2 is lowered by the crawler crane 202 to loosen the tension of the linear member 51, the elevating plates 16a and 16b descend to the short side faces 10a and 10b, and the bottom plates 11a and 11b are opened. Then, the earth and sand in the bucket 1 is discharged into the hopper 3 through the bottom opening of the bucket body 10.

  Here, as shown in FIG. 12, when the projecting portions 13a and 13b of the bucket 1 are supported from below by the receiving portion 32 of the hopper 3, the bucket 1 is located in the hopper 3 and the extension portion 30. .. Therefore, the earth and sand in the bucket 1 can be reliably discharged in the hopper 3 and the extension portion 30.

  According to the present embodiment, the structure (supporting structure) for supporting the bucket 1 by the cylindrical hopper 3 having the open upper and lower surfaces includes the protruding portions 13a and 13b protruding outward from the outer surface of the bucket 1. And a receiving portion 32 that is provided so as to project inward from the inner peripheral surface of the upper portion (for example, the upper end portion 31) of the hopper 3 and that can support the projecting portions 13a and 13b from below. Therefore, regardless of the direction of the bucket 1 suspended on the lifting device 2 that can be raised or lowered (the yawing direction), the bucket 1 is lowered as it is, and the bucket 1 is urged through the overhanging portions 13a and 13b. Can be placed on the receiving portion 32 of the hopper 3.

  Further, according to this embodiment, the receiving portion 32 is provided over the entire circumference of the hopper 3. Therefore, the degree of freedom in mounting the bucket 1 on the hopper 3 can be significantly improved.

  Further, according to the present embodiment, the bucket 1 includes the bucket body 10 that can be lifted by the lifting tool 2 that can be raised and lowered, and the bottom plates 11a and 11b pivotally supported by the bottom of the bucket body 10 so as to be openable and closable. When the bucket body 10 is being lifted by the hanging device 2, the bottom portion of the bucket body 10 is closed by the bottom plates 11a and 11b (see FIGS. 10 to 12), and the projecting portions 13a and 13b are supported from below by the receiving portion 32. The bottom plates 11a and 11b can be opened at the bottom portion of the bucket body 10 by lowering the hanging tool 2 while it is in motion (see FIGS. 6B and 12). Accordingly, the opening / closing operation of the bottom plates 11a and 11b can be realized by raising and lowering the hanging tool 2.

  Further, according to this embodiment, the hopper 3 is supported by the gantry 4. Therefore, the bucket 1 can be supported by the gantry 4 via the hopper 3.

  Further, according to the present embodiment, the structure (support structure) for supporting the bucket 1 by the hopper 3 is extended from the upper end portion 31 of the hopper 3 upward, and the extension portion 30 is expanded upward in a funnel shape. Is further included. Thereby, when the bucket 1 is lowered from directly above the hopper 3 and placed on the hopper 3, the bucket 1 can be easily brought to the placement position of the hopper 3 while bringing the wheel 27a or the wheel 27b into contact with the extension portion 30. Can be moved.

  Further, according to the present embodiment, the bucket 1 is located in the hopper 3 and the extension portion 30 when the projecting portions 13 a and 13 b are supported from below by the receiving portion 32. Therefore, the earth and sand in the bucket 1 can be reliably discharged in the hopper 3 and the extension portion 30.

  Further, according to the present embodiment, the projecting portions 13a and 13b include the frame portions 23a and 23b whose base end portions are fixed to the outer surface of the bucket 1 and the plurality of wheels provided at the tip portions of the frame portions 23a and 23b. 27a and 27b are included. The wheels 27a and 27b can roll on the inner peripheral surface of the extension portion 30. Therefore, when the bucket 1 is lowered from directly above the hopper 3 and mounted on the hopper 3, the bucket 1 is smoothly moved to the mounting position of the hopper 3 while abutting the wheel 27a or the wheel 27b on the extension portion 30. Can be made

  Further, according to this embodiment, the receiving portion 32 can support the projecting portions 13a and 13b from below in a state in which the wheels 27a and 27b are positioned between the frame portions 23a and 23b and the receiving portion 32. This can prevent the frame portions 23a and 23b of the overhang portions 13a and 13b from coming into contact with the receiving portion 32 of the hopper 3.

  Further, according to the present embodiment, in the method of mounting the bucket 1 on the hopper 3 in the above-described support structure, the bucket 1 with the bottom closed is moved to above the extension portion 30 (see FIG. 10), and the extension portion The bucket 1 is supported from below by the receiving portion 32 while the tip portion of the overhanging portion 13a (wheel 27a) or the tip portion of the overhanging portion 13b (wheel 27b) is brought into contact with the inner peripheral surface of 30. It is lowered to the position (see FIGS. 11 and 12). Therefore, when the bucket 1 is lowered from above the hopper 3 and placed on the hopper 3, the work of adjusting the orientation of the bucket 1 can be omitted, and the bucket 1 can be placed on the hopper 3 efficiently. it can.

  Further, according to the present embodiment, in the method of mounting the bucket 1 on the hopper 3 in the above-described support structure, the bucket 1 with the bottom closed is moved to above the extension portion 30 (see FIG. 10), and the extension portion While bringing the wheel 27a or the wheel 27b into contact with the inner peripheral surface of 30, the bucket 1 is lowered to a position where the projecting portions 13a and 13b are supported by the receiving portion 32 from below (see FIGS. 11 and 12). Therefore, when the bucket 1 is lowered from above the hopper 3 and placed on the hopper 3, the work of adjusting the orientation of the bucket 1 can be omitted, and the bucket 1 can be placed on the hopper 3 efficiently. it can.

  In the present embodiment, the overhanging portion 13a is configured to include the three wheel units 26a, and the overhanging portion 13b is configured to include the three wheel units 26b. However, the overhanging portions 13a and 13b are configured. The number of the wheel units 26a and 26b that operate is not limited to this. For example, the overhanging portion 13a may include four to eight wheel units 26a, and the overhanging portion 13b may include four to eight wheel units 26b.

  Further, in the present embodiment, the overhanging portions 13a, 13b are composed of the frame portions 23a, 23b and the wheel units 26a, 26b. However, in addition to this, the wheel units 26a, 26b are omitted, and the overhanging portions 13a, 13b are omitted. It may be configured by only the frame portions 23a and 23b.

FIG. 13 is an enlarged view of the projecting portion 13a ′ according to the second embodiment of the present invention. FIG. 13A shows a state in which the wheels 27 a are not in contact with the inner peripheral surface of the extension portion 30. FIG. 13B shows a state in which the wheels 27 a are in contact with the inner peripheral surface of the extension portion 30.
Differences from the above-described first embodiment will be described.

In the present embodiment, the projecting portion 13a ′ is configured by the frame portion 23a and the wheels 27a described above, and the shock absorber 60.
The shock absorber 60 is provided on the upper surface of the frame portion 23a. In the present embodiment, three shock absorbers 60 are arranged in plan view, similar to the arrangement of the three wheel units 26a in the first embodiment described above.

  Although not shown, in the present embodiment, the lower surfaces of the frame portions 23a and 23b of the overhanging portions 13a′13b ′ (specifically, the lower surfaces of the arc-shaped members 25a and 25b) are the upper surfaces of the receiving portions 32 of the hopper 3. In the abutting state, the receiving portion 32 of the hopper 3 can support the projecting portions 13a 'and 13b' from below.

  The shock absorber 60 is provided in the case 61, which is provided upright on the upper surface of the frame portion 23a, a coil spring (not shown) that is housed in the upper portion of the case 61 and is capable of expanding and contracting in the vertical direction. A lower end of the coil spring is connected to an upper end of a rod 62, a right end of the coil spring is pivotally supported by a lower end of the rod 62 via a pin 63, and a central portion of the coil spring is pivotally supported by a supporting member 65 at a support member 65. It is constituted by a substantially V-shaped arm member 66 supported. A wheel 27a is rotatably attached to the left end of the arm member 66 via an axle 67. Here, the support member 65 is provided at the left end portion on the upper surface of the frame portion 23a. A through hole (not shown) is formed in the left side of the case 61 so that the right side of the arm member 66 can be inserted and the arm member 66 can be swung.

As shown in FIG. 13A, when the wheel 27a is not in contact with the inner peripheral surface of the extension portion 30, the pin 63 and the axle 67 are located at substantially the same height.
On the other hand, as shown in FIG. 13B, when the wheel 27a comes into contact with the inner peripheral surface of the extension portion 30, the wheel 27a receives a vertical force from the inner peripheral surface of the extension portion 30, and as a result, the arm member 66 is The rod 62 is swung in a direction in which the rod 62 is pulled down about the pivot shaft 64. By pulling down the rod 62, the coil spring described above extends. In this way, the shock when the wheel 27a contacts the inner peripheral surface of the extension portion 30 can be reduced by the shock absorber 60. That is, the shock absorber 60 is for cushioning the impact when the wheel 27a comes into contact with the inner peripheral surface of the extension portion 30.

  In the present embodiment, the unillustrated overhanging portion 13b 'is configured by the frame portion 23b and the wheels 27b described above, and the shock absorber 60. The configuration of the overhanging portion 13b 'is the same as that of the overhanging portion 13a', and thus the description thereof is omitted.

  In particular, according to this embodiment, the overhang portions 13a 'and 13b' further include a shock absorber 60 provided between the frame portions 23a and 23b and the wheels 27a and 27b. Thus, the shock absorber 60 can reduce the impact when the wheels 27 a and 27 b come into contact with the inner peripheral surface of the extension portion 30.

  In the present embodiment, the overhanging portion 13a ′ includes three shock absorbers 60, and the overhanging portion 13b ′ includes three shock absorbers 60. However, the overhanging portion 13a ′, The number of shock absorbers 60 forming 13b ′ is not limited to this. For example, the projecting portion 13a 'may include four to eight shock absorbers 60, and the projecting portion 13b' may include four to eight shock absorbers 60.

14 is an enlarged view of the overhanging portion 13a ″ according to the third embodiment of the present invention. FIG. 14 (a) shows a state in which the wheels 27a are not in contact with the inner peripheral surface of the extension portion 30. (B) shows a state in which the wheels 27 a are in contact with the inner peripheral surface of the extension portion 30.
Differences from the above-described first embodiment will be described.

In the present embodiment, the projecting portion 13a ″ is composed of the frame portion 23a and the wheels 27a described above, and the shock absorber 70.
The shock absorber 70 is provided on the upper surface of the frame portion 23a. In the present embodiment, three shock absorbers 70 are arranged in a plan view, similar to the arrangement of the three wheel units 26a in the first embodiment described above.

  Although illustration is omitted, in the present embodiment, the lower surfaces of the frame portions 23a and 23b of the overhanging portions 13a "13b" (specifically, the lower surfaces of the arcuate members 25a and 25b) are the upper surfaces of the receiving portions 32 of the hopper 3. In the abutting state, the receiving portion 32 of the hopper 3 can support the protruding portions 13a "and 13b" from below.

  The shock absorber 70 includes a case 71 provided on the upper surface of the frame portion 23a, a coil spring (not shown) housed in the case 71 and capable of expanding and contracting in the left-right direction, and a through hole of the case 71 from inside the case 71 ( The rod 72 extends to the left through a rod 72 (not shown), and the left end of the coil spring is connected to the right end. A wheel 27a is rotatably attached to the left end portion of the rod 72 via an axle attachment member 73 and an axle 74.

As shown in FIG. 14A, when the wheel 27a is not in contact with the inner peripheral surface of the extension portion 30, the length of the portion P of the rod 72 exposed to the outside of the case 71 is L1.
On the other hand, as shown in FIG. 14 (b), when the wheel 27 a comes into contact with the inner peripheral surface of the extension portion 30, the wheel 27 a receives a vertical drag force from the inner peripheral surface of the extension portion 30, and as a result, of the rod 72. The length of the portion P exposed outside the case 71 is shortened from L1 to L2. The shortening of the portion P compresses the coil spring described above. In this manner, the shock when the wheel 27a comes into contact with the inner peripheral surface of the extension portion 30 can be reduced by the shock absorber 70. That is, the shock absorber 70 is for cushioning the impact when the wheels 27 a come into contact with the inner peripheral surface of the extension portion 30.

  In the present embodiment, the unillustrated overhanging portion 13b ″ includes the frame portion 23b, the wheel 27b, and the shock absorber 70 described above. The overhanging portion 13b ″ has the same configuration as the overhanging portion 13a ″. Therefore, the description thereof will be omitted.

  In particular, according to this embodiment, the overhang portions 13a ″, 13b ″ further include a shock absorber 70 provided between the frame portions 23a, 23b and the wheels 27a, 27b. Thereby, the shock when the wheels 27 a and 27 b come into contact with the inner peripheral surface of the extension portion 30 can be reduced by the cushioning device 70.

  In the present embodiment, an example in which the overhanging portion 13a ″ includes three shock absorbers 70 and the overhanging portion 13b ″ includes three shock absorbers 70 has been described, but the overhanging portion 13a ″, The number of the shock absorbers 70 forming the 13b ″ is not limited to this. For example, the overhanging portion 13a ″ may include four to eight shock absorbers 70, and the overhanging portion 13b ″ may include four to eight shock absorbers 70.

  In the first to third embodiments described above, the projecting portions 13a, 13b, 13a ', 13b', 13a ", 13b" are provided on the short side surfaces 10a, 10b of the bucket 1 (bucket body 10). In addition to or instead of this, an overhanging portion having the same configuration as any one of the overhanging portions 13a, 13b, 13a ', 13b', 13a ", 13b" is provided in the length of the bucket 1 (bucket body 10). It may be provided on the side surfaces 10c and 10d.

Moreover, in the above-mentioned 1st-3rd embodiment, although the earth and sand were mentioned as an example of the accommodation object accommodated in the bucket 1, the accommodation object is not restricted to earth and sand. The storage object may be, for example, a concrete piece.
Further, in the above-described first to third embodiments, earth and sand have been described as an example of the granular material that can be stored in the bucket 1, but the granular material that can be stored in the bucket 1 is not limited to earth and sand.

Further, the embodiments shown in the drawings are merely examples of the present invention, and the present invention is not limited to those shown directly by the described embodiments, and various improvements made by those skilled in the art within the scope of claims. It goes without saying that it includes changes.
The claims at the beginning of the application were as follows.
[Claim 1]
A structure for supporting a bottom opening type bucket by a cylindrical hopper having an open upper surface and a lower surface,
An overhanging portion that projects outward from the outer surface of the bucket,
A receiving portion that is provided so as to project inward from the inner peripheral surface of the upper portion of the hopper and that can support the protruding portion from below,
Including a support structure.
[Claim 2]
The support structure according to claim 1, wherein the receiving portion is provided over the entire circumference of the hopper.
[Claim 3]
The bucket is
With a bucket body that can be lifted by lifting equipment that can be raised and lowered,
A bottom plate pivotally supported on the bottom of the bucket body so as to be openable and closable;
Including,
When the bucket body is being lifted by the hanging device, the bottom portion of the bucket body is closed by the bottom plate,
The bottom plate can be opened at the bottom of the bucket body by lowering the suspender while the projecting portion is supported from below by the receiving portion. The support structure described in.
[Claim 4]
The support structure according to any one of claims 1 to 3, wherein the hopper is supported by a pedestal.
[Claim 5]
The support structure according to any one of claims 1 to 4, further comprising an extension portion that extends upward from an upper end portion of the hopper and has a funnel-shaped diameter that increases upward.
[Claim 6]
The support structure according to claim 5, wherein the bucket is located in the hopper and the extension when the projecting portion is supported from below by the receiving portion.
[Claim 7]
The projecting portion includes a frame portion having a base end portion fixed to an outer surface of the bucket, and a plurality of wheels provided at a tip end portion of the frame portion,
The support structure according to claim 5, wherein the wheel is rollable on the inner peripheral surface of the extension portion.
[Claim 8]
The support structure according to claim 7, wherein the receiving portion can support the protruding portion from below in a state in which the wheel is located between the frame portion and the receiving portion.
[Claim 9]
The support structure according to claim 7, wherein the projecting portion further includes a shock absorber provided between the frame portion and the wheel.
[Claim 10]
A method for mounting the bucket on the hopper in the support structure according to claim 5.
Moving the bucket with the bottom closed above the extension,
The bucket is lowered to a position where the protruding portion is supported from below by the receiving portion, while the tip end portion of the protruding portion is in contact with the inner peripheral surface of the extension portion,
How to place the bottom-opening bucket on the hopper.
[Claim 11]
A method for mounting the bucket on the hopper in the support structure according to any one of claims 7 to 9,
Moving the bucket with the bottom closed above the extension,
While bringing the wheel into contact with the inner peripheral surface of the extension part, the bucket is lowered to a position where the projecting part is supported from below by the receiving part,
How to place the bottom-opening bucket on the hopper.

DESCRIPTION OF SYMBOLS 1 Bucket 2 Hanging device 3 Hopper 4 Stand 10 Bucket main body 10a, 10b Short side surface 10c, 10d Long side surface 11a, 11b Bottom plate 12a, 12b Pivot shaft 13a, 13b, 13a ', 13b', 13a ", 13b" Overhang part 15 Opening / closing mechanism 16 Elevating plate 17 Guide members 18a, 18b Link members 19, 20a, 20b Pin 21 Stopper member 22 Hanging part 22a Through hole 23a, 23b Frame part 24a, 24b Beam member 25a, 25b Arc member 26a, 26b Wheel unit 27a , 27b Wheel 30 Extension part 31 Upper end part 32 Receiving part 41 Column 42 Beam 43 Inclined plate 51 Linear member 52 Hanging part 53 Locking member 60 Shock absorber 61 Case 62 Rod 63 Pin 64 Pivot shaft 65 Supporting member 66 Arm member 67 Axle 70 Shock absorber 71 Case 72 Rod 73 Axle mounting member 74 Axle 100 Stand 101 Column 102 Inclined plate 103, 104 Beam 105 Stopper member 110 Bucket 200 Vertical shaft 201 Backhoe 202 Crawler crane 203 Sediment temporary storage area 204 Backhoe 205 Dump truck

Claims (8)

A structure for supporting a bottom opening type bucket by a cylindrical hopper having an open upper surface and a lower surface,
An overhanging portion that projects outward from the outer surface of the bucket,
A receiving portion that is provided so as to project inward from the inner peripheral surface of the upper portion of the hopper and that can support the protruding portion from below,
An extension extending upward from the upper end of the hopper and having a funnel-shaped extension toward the top, the extension being in the shape of a truncated cone.
Only including,
The projecting portion includes a frame portion having a base end portion fixed to an outer surface of the bucket, and a plurality of wheels provided at a tip end portion of the frame portion,
A support structure in which the wheel can roll on the inner peripheral surface of the extension with the bottom of the bucket closed . The support structure according to claim 1 , wherein the receiving portion can support the projecting portion from below in a state in which the wheel is located between the frame portion and the receiving portion. The support structure according to claim 1 or 2 , wherein the bucket is located in the hopper and the extension when the projecting portion is supported from below by the receiving portion. The support structure according to claim 1, wherein the receiving portion is provided over the entire circumference of the hopper. The bucket is
With a bucket body that can be lifted by lifting equipment that can be raised and lowered,
A bottom plate pivotally supported on the bottom of the bucket body so as to be openable and closable;
Including,
When the bucket body is being lifted by the hanging device, the bottom portion of the bucket body is closed by the bottom plate,
When the projecting portion is supported from below by the receiving unit, by lowering the hanger, it is possible that the bottom plate is opened at the bottom of the bucket body, claims 1 to 4 The support structure according to any one of 1 . The support structure according to any one of claims 1 to 5 , wherein the hopper is supported by a pedestal. The support structure according to any one of claims 1 to 6, wherein the projecting portion further includes a shock absorber provided between the frame portion and the wheel. A method of mounting the bucket on the hopper in the support structure according to any one of claims 1 to 7 ,
Moving the bucket with the bottom closed above the extension,
While bringing the wheel into contact with the inner peripheral surface of the extension part, the bucket with the bottom closed is lowered to a position where the projecting part is supported from below by the receiving part.
How to place the bottom-opening bucket on the hopper.