Ready-mixed concrete supply device

Abstract

To provide a compact ready-mixed concrete feed device capable of reducing waste concrete.SOLUTION: A ready-mixed concrete feed device 5 comprises: a hopper 20 having a truncated cone-shaped circumferential part 30 expanded toward an upper part and an opening 37 facing in a lower part; a blade part 21 rotatable at the inside of the circumferential part 30; a connection part 22 rotatably supported along the outer circumference of the circumferential part 30; and a driving part 23 transmitting rotational force to the connection part 22. The blade part 21 extends along an inner circumferential face 39 of the hopper 20, a tip part 54 is connected to the connection part 22, and the driving part 23 is arranged at the outside of the hopper 20.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a ready-mixed concrete supply device. [Background technology]

[0002] The exterior walls of a house can be constructed on-site, or they can be manufactured in advance in a factory or other well-equipped facility with better design and strength, and then transported to the site for construction.

[0003] When exterior walls are manufactured in a factory, formwork of various shapes and sizes is used, and ready-mixed concrete is poured into these transported formwork to form the walls. At this time, ready-mixed concrete is poured into the formwork from a hopper that stores it.

[0004] For example, the ready-mixed concrete hopper disclosed in Patent Document 1 includes a hopper with a semi-cylindrical box-shaped bottom, a horizontal-axis agitating blade 7, a U-shaped frame-shaped cleaning tool 13, rotary drive devices 14 and 15 that independently rotate the agitating blade 7 and the cleaning tool 13, an arc-shaped scraping bar 13a inclined with respect to the rotation direction of the cleaning tool 13, and a discharge pipe 1a. In this ready-mixed concrete hopper, the intermittently operated cleaning tool 13 scrapes up the ready-mixed concrete that has adhered to the hopper, and the scraping bar 13c guides it into the discharge pipe 1a. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-229930 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the ready-mixed concrete hopper described in Patent Document 1 is long horizontally, requiring ample space for installation. Therefore, a practical hopper that is less restricted by installation location is desired. Even in such a case, the materials may separate due to vibration, causing the ready-mixed concrete to harden inside the hopper, resulting in waste concrete.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a ready-mixed concrete supplying device that is compact and can reduce waste concrete. [Means for solving the problem]

[0008] (1) The ready-mixed concrete supply device according to the present invention comprises a hopper having a truncated cone-shaped periphery whose diameter expands upward and an opening facing downward, blades rotatable inside the periphery, a connecting part rotatably supported along the outer periphery of the periphery, and a drive part for transmitting a rotational force to the connecting part. The blades extend along the inner periphery of the hopper and have their tips connected to the connecting part, and the drive part is disposed outside the hopper.

[0009] According to the above configuration, the ready-mixed concrete supply device is compact because the periphery of the hopper is frustum-shaped. Furthermore, because the blades and drive unit are not located above the hopper, ready-mixed concrete can be easily supplied from above. Furthermore, the blades rotate inside the periphery, scraping off ready-mixed concrete that has adhered to the hopper, thereby reducing the amount of waste concrete.

[0010] (2) Preferably, the hopper has a bottom portion located at the lower end of the periphery, the opening is formed in the bottom portion, and the bottom portion rotatably supports the blade portion.

[0011] According to the above configuration, the blades can scrape the ready-mixed concrete that has adhered to the hopper down to the bottom, and the scraped-down ready-mixed concrete can be discharged from the opening in the bottom, thereby maintaining smooth discharge of the ready-mixed concrete in the hopper.

[0012] (3) Preferably, the bottom portion has a support portion extending upward, and the blade portion has a plate portion supported by the support portion and extending in a direction perpendicular to the axial direction of the hopper, a first inclined piece extending from one end of the plate portion, and a second inclined piece extending from the other end of the plate portion.

[0013] According to the above configuration, the blades are supported by the support parts, and the tips of the first and second inclined pieces extending from the support parts are supported by the connecting parts. This allows the blades to maintain strength while minimizing the number of support points. Furthermore, the blades can directly stir and scrape out the fresh concrete that has stuck near the bottom, preventing separation and sticking of the fresh concrete materials. (4) Preferably, the apparatus further includes a detection device for detecting the weight of the hopper and a controller for controlling the drive unit. The controller calculates the weight of the ready-mixed concrete stored in the hopper based on the weight detected by the detection device, and transmits a drive signal to the drive unit to drive the blade unit for a predetermined time according to the calculated weight.

[0014] According to the above configuration, the blade portion can be rotated according to the weight of the fresh concrete in the hopper, so that the fresh concrete stuck to the hopper can be peeled off and discharged in a timely manner, and separation of the fresh concrete can be suppressed.

[0015] (5) Preferably, the connecting portion is annular and disposed so as to surround the upper end of the hopper.

[0016] According to the above configuration, since the connecting portion is annular, the tip of the blade portion can be supported regardless of the direction and position in which it extends along the inner peripheral surface of the hopper.

[0017] (6) Preferably, the blade portion has a main surface and an end surface perpendicular to the main surface, the main surface being close to an inner peripheral surface of the hopper, and the end surface being located on the rotational direction side of the blade portion.

[0018] According to the above configuration, the ready-mixed concrete adhering to the inner peripheral surface of the hopper is cut by the end faces of the blades, so that the ready-mixed concrete can be more reliably peeled off.

[0019] (7) Preferably, the hopper has a first flange that protrudes in an annular shape, and the first flange supports the connecting portion from below via a roller that is rotatably attached to the connecting portion.

[0020] According to the above configuration, the connecting portion to which the blade portion is connected is supported by the first flange via the roller, so that the load on the blade portion can be reduced.

[0021] (8) Preferably, the hopper further includes a second flange disposed above the first flange, the second flange being located above the roller.

[0022] According to the above configuration, the second flange is located above the roller, so it can restrict the upward movement of the roller, which in turn restricts the upward movement of the connecting portion, thereby reducing the load on the blade portion. [Effects of the Invention]

[0023] The ready-mixed concrete supply device according to the present invention is compact and can reduce waste concrete. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a diagram showing a ready-mixed concrete supplying device 5 according to one embodiment of the present invention together with the equipment to be installed. [Figure 2]FIG. 2 is a diagram showing a ready-mixed concrete supply device 5 according to one embodiment of the present invention. [Figure 3] FIG. 3 is a vertical cross-sectional view showing the hopper 20 together with the blade portion 21 and the connecting portion 22. As shown in FIG. [Figure 4] FIG. 4 is a plan view of FIG. [Figure 5] FIG. 5 is a diagram showing the connecting portion 22 together with the driving portion 23 and a part of the hopper 20. As shown in FIG. [Figure 6] FIG. 6 is a functional block diagram of the ready-mixed concrete supply device 5. [Figure 7] FIG. 7 is a flowchart for explaining the control of the ready-mixed concrete supply device 5. [Figure 8] FIG. 8 is a flowchart for explaining the control of the ready-mixed concrete supply device 5 after the opening / closing lid 16 is opened. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, an embodiment of the present invention will be described. Note that the embodiment described below is merely one example of the present invention, and it goes without saying that it can be modified as appropriate within the scope of the present invention. In the following description, a vertical direction 1 is defined based on a state in which a ready-mixed concrete supply device 5 is able to supply ready-mixed concrete 6 to a formwork 7 (the state shown in FIG. 1 ), a left-right direction 2 is defined as a direction in which a hopper 20 and a drive unit 23 are aligned and is perpendicular to the vertical direction 1, and a front-rear direction 3 is defined as a direction perpendicular to the vertical direction 1 and the left-right direction 2.

[0026] The ready-mixed concrete supplying device 5 according to this embodiment is used when forming exterior walls such as dyne concrete in a factory, and is a device for supplying ready-mixed concrete 6 to a formwork 7. The ready-mixed concrete supplying device 5 has a function of stirring the materials of the ready-mixed concrete 6 in the hopper 20 so that they do not separate due to vibration or solidify over time.

[0027] As shown in FIG. 1 , the ready-mixed concrete supply device 5 is fixed to a frame 11 that is supported on a support base 10 so that it can move in the left-right direction 2 and the front-back direction 3. The ready-mixed concrete supply device 5 is replenished with ready-mixed concrete 6 from a large replenishment tank 12 installed above. The ready-mixed concrete supply device 5 that stores the ready-mixed concrete 6 can continuously supply the ready-mixed concrete 6 to a plurality of formworks 7. The ready-mixed concrete supply device 5 is disposed above the formworks 7 that are transported in the left-right direction 2 by a transport device 13.

[0028] A pipe 14 is connected below the ready-mixed concrete supply device 5, and guides the ready-mixed concrete 6 discharged from the ready-mixed concrete supply device 5 onto the formwork 7. A discharge port 15 and an opening / closing lid 16 that controls the discharge of the ready-mixed concrete 6 are arranged at the lower end of the pipe 14.

[0029] The formworks 7 of different sizes that are continuously transported on the transport device 13 each have their opening and closing lids 16 controlled to open and close, and ready-mixed concrete 6 is supplied and molded. The formworks 7 are equipped with formwork-side detection devices 17 (see FIG. 6) for detecting the weight of the supplied ready-mixed concrete 6. When the ready-mixed concrete supply device 5 has finished supplying the ready-mixed concrete 6, it is again refilled with ready-mixed concrete 6 from the refilling tank 12, and is ready to supply ready-mixed concrete to multiple formworks 7. Note that although a description of the drive and control of the formworks 11 and transport device 13 will be omitted, they may be controlled by other drive units and controllers, or may be controlled by the controller 24 that controls the ready-mixed concrete supply device 5 according to this embodiment.

[0030] As shown in Figures 2 and 3, the ready-mixed concrete supply device 5 includes a hopper 20, a blade section 21 (see Figure 3), a connecting section 22, a drive section 23, a controller 24, a detection device 25 (see Figure 6), a display section 26, and an operation section 27.

[0031] The hopper 20 is fixed to the frame 11. The hopper 20 has a peripheral portion 30, a cylindrical portion 31, a bottom portion 32, and an opening 37.

[0032] The peripheral portion 30 has a truncated cone shape that expands in diameter upward. An axis L1 of the peripheral portion 30 extends in the vertical direction 1. In Fig. 3, hatching indicating a cross section is omitted to avoid cluttering the drawing.

[0033] The tubular portion 31 is formed integrally with the peripheral portion 30 on the upper side of the hopper 20. The tubular portion 31 is cylindrical. The thickness of the tubular portion 31 is the same as the thickness of the peripheral portion 30. The tubular portion 31 is open at the top. The tubular portion 31 has a first flange 35 and a second flange 36.

[0034] The first flange 35 is located at the lower part of the cylindrical portion 31. The first flange 35 projects in an annular shape radially outward from the cylindrical portion 31. The upper surface of the first flange 35 is a horizontal flat surface.

[0035] Similar to the first flange, the second flange 36 projects radially outward in an annular shape from the tubular portion 31. The second flange 36 is located at the upper part of the tubular portion 31. That is, the second flange 36 is disposed above and spaced apart from the first flange 35. The second flange 36 is parallel to the first flange 35. The lower surface of the second flange 36 is a horizontal, flat surface.

[0036] The bottom portion 32 is located at the lower end of the peripheral portion 30. The bottom portion 32 has a support portion 38.

[0037] The support portion 38 is axially shaped and protrudes upward from the bottom portion 32. The support portion 38 is located at the bottom within the peripheral portion 30. The support portion 38 is arranged so as to be coaxial with the hopper 20. The support portion 38 supports the blade portion 21 so that it can rotate.

[0038] Opening 37 connects internal space S of hopper 20 with piping 14 (see FIG. 1). Opening 37 is a hole facing downward in bottom portion 32. That is, opening 37 penetrates bottom portion 32 in the thickness direction. Two openings 37 are provided in bottom portion 32. Opening 37 is located outside axis L1 of hopper 20.

[0039] As shown in Figures 3 and 4, the blade portion 21 is disposed within the hopper 20. The blade portion 21 is supported by a support portion 38 and is rotatable inside the peripheral portion 30. The blade portion 21 extends along the inner peripheral surface 39 of the hopper 20. The blade portion 21 mixes the ready-mixed concrete 6 within the hopper 20. The blade portion 21 has a plate piece 40, a first inclined piece 41, and a second inclined piece 42.

[0040] The plate piece 40 is disposed above the bottom portion 32. The plate piece 40 is a flat plate extending in a direction L2 perpendicular to the axis L1 of the hopper 20. The plate piece 40 is supported by the support portion 38 at its center portion.

[0041] The first inclined piece 41 extends from one end 45 of the plate piece 40 along the inner peripheral surface 39 of the hopper 20. More specifically, the first inclined piece 41 is a flat plate that extends obliquely upward from the one end 45 along the inner peripheral side 46 of the peripheral portion 30, bends at the upper end, and further extends upward along the inner peripheral side 47 of the tubular portion 31.

[0042] The second inclined piece 42 extends from the other end 48 of the plate piece 40 along the inner peripheral surface 39 of the hopper 20. More specifically, the second inclined piece 42 is a flat plate that extends obliquely upward from the other end 48 along the inner peripheral side 46 of the peripheral portion 30, bends at the upper end, and further extends upward along the inner peripheral side 47 of the tubular portion 31. The second inclined piece 42 is disposed symmetrically to the first inclined piece 41 with respect to the axis L1 of the hopper 20. The first inclined piece 41 and the second inclined piece 42 each have a main surface 50 and an end surface 51.

[0043] The main surfaces 50 are a pair of surfaces that face each other in the thickness direction on each of the first inclined piece 41 and the second inclined piece 42. Of the pair of main surfaces 50, an outer surface 52 is close to the inner circumferential side 46 of the peripheral portion 30. Of the pair of main surfaces 50, an inner surface 53 faces the axial center L1 of the hopper 20. It is desirable to set the width of the main surfaces 50 to a short dimension so that the ready-mixed concrete 6 is less likely to adhere and solidify.

[0044] The end faces 51 are surfaces that are perpendicular to each of the pair of main faces 50. The end faces 51 are located on the rotation direction side R1 of the blade portion 21 in the first inclined piece 41 and the second inclined piece 42 (see FIG. 4). The end faces 51 of the blade portion 21 of the ready-mixed concrete supply device 5 according to this embodiment are also located on the reverse rotation direction side of the rotation direction side R1 of the blade portion 21.

[0045] The connecting portion 22 is annular and follows the outer periphery of the peripheral portion 30. The connecting portion 22 is disposed so as to surround the upper end of the hopper 20. The connecting portion 22 is rotatably supported relative to the hopper 20 via rollers 63, which will be described later. The tip portions 54 of the blade portions 21 are connected to the connecting portion 22. As shown in FIG. 5 , the connecting portion 22 has a connecting portion main body 60, a first fixed piece 61, a second fixed piece 62, rollers 63, and a chain 64.

[0046] The connecting portion main body 60 is disposed so as to surround the outer peripheries of the first flange 35 and the second flange 36. The connecting portion main body 60 has an L-shaped cross section. The upper surface of the connecting portion main body 60 is at the same height as the upper end of the tubular portion 31.

[0047] The first fixed pieces 61 are arranged above the connecting portion main body 60. The first fixed pieces 61 are arranged in two locations symmetrically with respect to the axis L1 of the hopper 20 (see FIG. 3). Each first fixed piece 61 extends from above the connecting portion main body 60, beyond the edge of the tubular portion 31, into the inside of the tubular portion 31. The tip portions 54 of the blade portions 21 are fixed by nuts 65 to the portions of each first fixed piece 61 that extend beyond the edge of the tubular portion 31.

[0048] The second fixed piece 62 has an L-shaped cross section and is disposed below the first fixed piece 61 with the connecting portion body 60 sandwiched therebetween. The second fixed piece 62 is fixed to the first fixed piece 61 together with the connecting portion body 60 by a bolt 66 and a nut 65.

[0049] A plurality of rollers 63 are arranged inside the connecting portion main body 60. The rollers 63 are rotatably supported by shafts 67 that extend radially inward from a portion that extends downward of the connecting portion main body 60. The rollers 63 are arranged between the first flange 35 and the second flange 36. The rollers 63 are supported by the first flange 35 and are in contact with the upper surface of the first flange 35. The rollers 63 are not in contact with the second flange 36. The rollers 63 have receiving portions 68 on the base end side. The receiving portions 68 abut against outer peripheral edges 69 of the first flange 35 and the second flange 36.

[0050] The chain 64 is fixed to the downwardly extending portion of the second fixed piece 62 via a fixing device 70 by a bolt 66 and a nut 65 .

[0051] The drive unit 23 applies a rotational force to the connecting unit 22. The drive unit 23 is disposed further outside the hopper 20, which is disposed outside the connecting unit 22. The drive unit 23 transmits power to the connecting unit 22 via a chain 64.

[0052] 2, the controller 24 is connected to the driving unit 23. The controller 24 controls the driving unit 23.

[0053] The detection device 25 detects the weight of the hopper 20 (see FIG. 6). The detection device 25 is, for example, a strain gauge (not shown) provided on a member that supports the hopper 20. The detection device 25 can measure the weight of the hopper 20 when the ready-mixed concrete 6 is stored therein, and therefore the controller 24 can calculate the weight of the ready-mixed concrete 6 stored in the hopper 20 based on the weight of the hopper 20 when the ready-mixed concrete 6 is not stored therein.

[0054] The display unit 26 may be, for example, a liquid crystal display (short for Liquid Crystal Display), an organic EL display (short for Organic Electro-Luminescence Display), or the like.

[0055] The operation unit 27 accepts a user's operation to select an object displayed on the display screen of the display unit 26. Specifically, the operation unit 27 has buttons, and outputs various operation signals associated with pressed buttons.

[0056] 6, the controller 24 includes a CPU 73 and a memory 74. The memory 74 stores programs. The CPU 73 reads out the programs and information stored in the memory 74 and performs various processes.

[0057] The controller 24 is connected to an opening / closing lid 16 that opens and closes the discharge outlet 15, a formwork side detection device 17 that detects the weight of the formwork 7 together with the supplied fresh concrete 6, a drive unit 23 that transmits driving force to the blade unit 21, a detection device 25 that detects the weight of the hopper 20 together with the stored fresh concrete, a display unit 26 that displays various information, and an operation unit 27 that accepts commands from the user.

[0058] [Operation of ready-mixed concrete supply device 5] After being refilled with ready-mixed concrete 6 from the refilling tank 12, the ready-mixed concrete supplying device 5 moves on the support base 10 and is positioned above the formwork 7 that has been transported by the transporting device 13. With the discharge outlet 15 of the ready-mixed concrete supplying device 5 positioned above the formwork 7, the ready-mixed concrete supplying device 5 moves back and forth in the forward and backward directions 3 on the support base 10 while also moving left and right in the left and right directions 2 so that the ready-mixed concrete 6 reaches every corner of the formwork 7, thereby supplying the ready-mixed concrete 6 to the formwork 7. As the ready-mixed concrete supplying device 5 moves in this way, vibrations are transmitted to the ready-mixed concrete 6 in the hopper 20, making it easier for the materials to separate, but the ready-mixed concrete supplying device 5 controls the drive of the blades 21, which will be described later, while supplying the ready-mixed concrete 6, thereby preventing the separation of the materials.

[0059] Once the formwork 7 is filled with fresh concrete 6 and the opening / closing lid 16 is closed, the formwork 7 is transported by the transport device 13, and another new formwork (not shown) is transported below the ready-mixed concrete supply device 5. At this time, a worker may set a nested formwork within the new formwork to mold the wall material into a shape that fits the installation location of the building. After the new formwork 7 is set, fresh concrete 6 is again supplied to the formwork 7. In the same manner, the ready-mixed concrete supply device 5 continuously supplies fresh concrete 6 to a plurality of formworks 7 of various shapes until the fresh concrete 6 in the hopper 20 runs out. When the fresh concrete 6 to be supplied to the formwork 7 runs out, the ready-mixed concrete supply device 5 replenishes fresh concrete 6 from the refill tank 12 and supplies fresh concrete 6 to the formwork 7 again.

[0060] [Drive control of blade portion 21] The drive control of the blade portion 21 is performed intermittently while the ready-mixed concrete 6 is being supplied to each of the plurality of formworks 7, that is, between the time when the opening / closing lid 16 for one formwork 7 is opened and the time when it is closed.

[0061] Hereinafter, an example of steps (S1 to S13) performed by the controller 24 when supplying ready-mixed concrete 6 to one formwork 7 will be described with reference to FIG.

[0062] The controller 24 starts its operation when it receives a command from the user to start supplying the ready-mixed concrete 6 to the formwork 7.

[0063] First, the controller 24 acquires the weight of the hopper 20 from the detection device 25 while the ready-mixed concrete 6 is stored in the hopper 20 (S1). Next, the controller 24 stores the acquired weight data of the hopper 20 while the ready-mixed concrete 6 is stored in the memory 74 (S2).

[0064] The controller 24 calculates the weight of the ready-mixed concrete 6 stored in the hopper 20 (also referred to as "ready-mixed concrete" in FIGS. 7 and 8) based on the stored weight data and weight data of only the hopper 20 in which no ready-mixed concrete 6 is stored, which has been stored in advance in the memory 74 or which has been input from the operation unit 27 (S3). The controller 24 stores the calculated weight data of the ready-mixed concrete 6 stored in the hopper 20 in the memory 74 (S4). The maximum weight of the ready-mixed concrete 6 stored in the hopper 20 of the ready-mixed concrete supply device 5 according to this embodiment from the replenishing tank 12 is 1000 kg. The weight of the ready-mixed concrete 6 in the hopper 20 decreases as the ready-mixed concrete 6 is supplied to the formwork 7. Therefore, in step S3, the controller 24 calculates the weight of the ready-mixed concrete 6 stored in the hopper 20 at the timing of step S1, and updates the weight data already stored in the memory 74.

[0065] The controller 24 compares the weight of the fresh concrete 6 to be supplied to the formwork 7, which is stored in advance in the memory 74 or input from the operation unit 27, with the weight data of the fresh concrete 6 stored in the hopper 20, and determines whether an amount of fresh concrete 6 sufficient to supply to the formwork 7 remains in the hopper 20 (S5). When the controller 24 determines that there is not enough fresh concrete 6 remaining in the hopper 20 to supply to the formwork 7 (S5: No), it stops supplying the fresh concrete 6 to the formwork 7. When the controller 24 determines that there is enough fresh concrete 6 remaining in the hopper 20 to fill the formwork 7 (S5: Yes), it opens the opening / closing lid 16 (S6). This causes the fresh concrete 6 to be discharged from the discharge port 15 and supplied to the formwork 7.

[0066] Immediately after opening the opening / closing cover 16, the controller 24 controls the drive of the blade portion 21 via the drive portion 23, which will be described later (S7).

[0067] After controlling the drive of the blade portion 21, the controller 24 acquires the weight of the formwork 7 to which the ready-mixed concrete 6 has been supplied from the formwork-side detection device 17 (S8). The controller 24 stores the acquired weight data of the formwork 7 to which the ready-mixed concrete 6 has been supplied in the memory 74 (S9).

[0068] The controller 24 calculates the weight of the ready-mixed concrete 6 being supplied into the formwork 7 based on the stored weight data and weight data of only the formwork 7 to which the ready-mixed concrete 6 has not been supplied, which data has been stored in advance in the memory 74 or has been input from the operation unit 27 (S10). The controller 24 stores the weight data of the ready-mixed concrete 6 being supplied into the formwork 7 in the memory 74 (S11).

[0069] The controller 24 determines whether the amount of fresh concrete 6 necessary to fill the formwork 7 has been supplied based on weight data of the fresh concrete 6 to be supplied to the formwork 7, which has been stored in advance in the memory 74 or input from the operation unit 27, and weight data of the fresh concrete 6 being supplied to the formwork 7 (S12). When the controller 24 determines that the amount of fresh concrete 6 necessary to fill the formwork 7 to which the fresh concrete 6 is being supplied has been supplied (S12: Yes), the controller 24 closes the opening / closing lid 16 (S13). This completes the series of operations in which fresh concrete 6 is supplied from the fresh concrete supply device 5 to one formwork 7. On the other hand, when the controller 24 determines in step S12 that the amount of fresh concrete 6 necessary to fill the formwork 7 has not been supplied (S12: No), the controller 24 acquires the weight of the formwork 7 while keeping the opening / closing lid 16 open and supplying the fresh concrete 6 to the formwork 7 (S8).

[0070] An example (S20 to S23) of drive control (S7) of blade portion 21 by controller 24 via drive portion 23 will be described below with reference to FIG.

[0071] The controller 24 acquires the drive conditions defined in a processing table stored in advance in the memory 74 and controls the drive of the blade portion 21 via the drive unit 23. The processing table defines the timing and drive time for controlling the drive of the blade portion 21. In this embodiment, the weight of the ready-mixed concrete 6 stored in the hopper 20 is 1000 kg, and when it is determined according to the processing table that the weight of the ready-mixed concrete 6 stored in the hopper 20 is 500 kg or less, 300 kg or less, or 100 kg or less, the controller 24 drives the drive unit 23 to drive the blade portion 21 for 10 seconds.

[0072] Specifically, immediately after opening the opening / closing cover 16 in step S6, the controller 24 determines whether the weight data stored in the memory 74 in step S3 is equal to or less than 100 kg (S20). If the controller 24 determines that the weight data is equal to or less than 100 kg (S20: Yes), the controller 24 drives the drive unit 23 to drive the blade unit 21 for 10 seconds (S23).

[0073] When controller 24 determines that the weight data is not 100 kg or less (S20: No), it determines whether the weight data is 300 kg or less (S21).When controller 24 determines that the weight data is 300 kg or less (S21: Yes), it drives drive unit 23 to drive blade unit 21 for 10 seconds (S23).

[0074] When controller 24 determines that the weight data is not 300 kg or less (S21: No), it determines whether the weight data is 500 kg or less (S22). When controller 24 determines that the weight data is 500 kg or less (S22: Yes), it drives drive unit 23 to drive blade unit 21 for 10 seconds (S23). When controller 24 determines that the weight data is not 500 kg or less (S22: No), it ends drive control of blade unit 21.

[0075] [Effects of this embodiment] According to this embodiment, the ready-mixed concrete supply device 5 is compact because the peripheral portion 30 of the hopper 20 is frustum-shaped. Moreover, the diameter of the hopper 20 expands upward, and the blade portion 21 and drive portion 23 are not located above the hopper 20, making it easy to supply the ready-mixed concrete 6 from above. Furthermore, because the blade portion 21 rotates along the inner peripheral surface 39 of the hopper 20, it is possible to scrape off ready-mixed concrete 6 that has adhered to the inside of the hopper 20 due to vibrations, etc., and as a result, it is possible to reduce the amount of waste concrete.

[0076] Furthermore, according to this embodiment, the ready-mixed concrete 6 that has stuck to the hopper 20 can be scraped down to the bottom 32 by the blades 21, and the ready-mixed concrete 6 scraped down to the bottom 32 can be discharged from the openings 37 of the bottom 32 by stirring the blades 21. This promotes the discharge of the ready-mixed concrete 6 that has stuck to the hopper 20, and maintains smooth discharge of the ready-mixed concrete 6 in the hopper 20.

[0077] Furthermore, according to this embodiment, blade portion 21 is supported by support portion 38, and the tips of first inclined piece 41 and second inclined piece 42 extending from support portion 38 are each connected to connecting portion 22. Therefore, blade portion 21 can ensure strength while reducing the number of support points. Furthermore, since ready-mixed concrete 6 that has stuck near bottom portion 32 can be directly stirred and scraped out by plate pieces 40, separation and sticking of the materials of ready-mixed concrete 6 can be prevented.

[0078] Furthermore, according to this embodiment, the blade portion 21 can be rotated in accordance with the weight of the fresh concrete 6 in the hopper 20, so that the blade portion 21 can be intermittently stirred when a preset weight is reached, regardless of the speed at which the fresh concrete 6 is discharged from the hopper 20. Therefore, if the timing of stirring the blade portion 21 is set to be intermittent at predetermined time intervals, the number of stirring operations increases as the speed at which the fresh concrete 6 is discharged from the hopper 20 slows, which may cause the materials of the fresh concrete 6 to separate. However, by rotating the blade portion 21 in accordance with the weight of the fresh concrete 6 in the hopper 20, it is possible to scrape off and discharge the fresh concrete 6 that has stuck to the inside of the hopper 20 while suppressing an increase in the number of stirring operations.

[0079] Furthermore, according to this embodiment, since the connecting portion 22 is annular, the tip of the blade portion 21 can be supported regardless of the direction in which the blade portion 21 extends along the inner surface 39 of the hopper 20 and the position in which the blade portion 21 is positioned within the hopper 20.

[0080] Furthermore, according to this embodiment, the blade portion 21 has an end face 51 on the rotation direction side R1, so that the end face 51 of the blade portion 21 collides with the ready-mixed concrete 6 that has adhered to the inner peripheral surface 39 of the hopper 20. Therefore, the ready-mixed concrete 6 that has adhered to the inner peripheral surface 39 of the hopper 20 is cut by the end face 51 of the blade portion 21, so that the adhered ready-mixed concrete 6 can be more reliably peeled off.

[0081] Furthermore, according to the present embodiment, connecting portion 22 to which blade portion 21 is connected is supported by first flange 35 via roller 63, so that the load applied to blade portion 21 can be supported by first flange 35. Therefore, the load applied to blade portion 21 can be suppressed.

[0082] Furthermore, according to this embodiment, second flange 36 is located above roller 63, and therefore can restrict the upward movement of roller 63. Therefore, the upward movement of connecting portion 22 to which roller 63 is connected can also be restricted, and as a result, the load on blade portion 21 can be reduced.

[0083] In the present embodiment, the hopper 20 has a bottom 32 at the lower end of the peripheral portion 30, and the blades 21 are rotatably supported by the support portions 38. However, the present invention is not limited to this configuration. The hopper 20 may simply have a downward-facing opening at the lower end of the peripheral portion 30, without a bottom 32. In this case, the blades 21 disposed inside the peripheral portion 30 may be rotatably supported about the axis L1 of the hopper 20 by a support member (not shown) spanning the inner peripheral surface 39 of the lower portion of the hopper 20. The support member may also extend in a cantilevered manner from the inner peripheral surface 39 of the hopper 20 and rotatably support the blades 21 about the axis L1 of the hopper 20.

[0084] In addition, although the present embodiment has been described with reference to an example in which two openings 37 are provided in the bottom portion 32, the present invention is not limited to this configuration. One opening 37 may be provided in the bottom portion 32, or three or more openings 37 may be provided.

[0085] In addition, in the present embodiment, the first inclined piece 41 and the second inclined piece 42 are described as flat plates, but the present invention is not limited to this configuration. The first inclined piece 41 and the second inclined piece 42 may be rod-shaped, or the main surface 50 may be formed as a curved surface. Furthermore, the first inclined piece 41 and the second inclined piece 42 may be provided with ridges or protrusions.

[0086] Furthermore, in the present embodiment, the blade portion 21 has been described as having the first inclined piece 41 and the second inclined piece 42 arranged at positions symmetrical with respect to the axis L1 of the hopper 20, but is not limited to this configuration. The blade portion 21 may be composed of a single inclined piece, or may have three or more inclined pieces arranged circumferentially within the hopper 20.

[0087] In the present embodiment, the timing and drive time of the drive control of the blade portion 21 are described as an example for a case where the weight of the ready-mixed concrete 6 stored in the hopper 20 from the replenishing tank 12 is 1,000 kg. The drive control of the blade portion 21 is performed for a weight of 500 kg or less, 300 kg or less, or 100 kg or less, and the drive time is 10 seconds. However, this is not limited to this example. For example, the drive control of the blade portion 21 may be performed for a weight of 500 kg or less, 300 kg or less, 200 kg or less, or 100 kg or less. The drive time of the blade portion 21 may be extended depending on the weight, such as 10 seconds when the weight is 100 kg or less, 20 seconds when the weight is 300 kg or less, and 30 seconds when the weight is 500 kg or less. [Explanation of symbols]

[0088] 5. Ready-mixed concrete supply device 6. Ready-mix concrete 20 Hopper 21 Blade 22...Connection part 23 Drive unit 24... Controller 25. Detection device 32...Bottom 35···First flange 36 Second flange 37...Aperture 38...Support part 39...Inner peripheral surface 40...Plate piece 41...1st inclined piece 42...Second inclined piece 50... Main surface 51...end face 54 (of the blade) 63 Laura L1...Axis center L2: Direction perpendicular to the axis R1: Rotation direction side

Claims

1. a hopper having a frustum-shaped peripheral portion whose diameter increases upward, a cylindrical portion formed integrally with the peripheral portion at an upper side, a bottom portion located at a lower end of the peripheral portion, and an opening formed in the bottom portion and facing downward; a blade portion rotatable inside the circumferential portion; a connecting portion rotatably supported along an outer periphery of the cylindrical portion; a drive unit disposed outside the hopper and configured to transmit a rotational force to the connecting unit; A ready-mixed concrete supply device comprising: The blade portion extends along the inner peripheral surface of the hopper and has a tip portion connected to the connecting portion, The bottom portion of the ready-mixed concrete supply device rotatably supports the blade portion.

2. The bottom portion has a support portion extending upward, The ready-mixed concrete supply device described in claim 1, wherein the blade portion has a plate supported by the support portion and extending in a direction perpendicular to the axial direction of the hopper, a first inclined piece extending from one end of the plate, and a second inclined piece extending from the other end of the plate.

3. A hopper having a truncated cone-shaped peripheral portion that expands in diameter toward the top, a cylindrical portion formed integrally with the peripheral portion at the top, and an opening facing downward; a blade portion rotatable inside the circumferential portion; a connecting portion rotatably supported along an outer periphery of the cylindrical portion; a drive unit disposed outside the hopper and configured to transmit a rotational force to the connecting unit; a detection device for detecting the weight of the hopper; a controller for controlling the drive unit; A ready-mixed concrete supply device comprising: The blade portion extends along the inner peripheral surface of the hopper and has a tip portion connected to the connecting portion, The controller calculates the weight of the ready-mixed concrete stored in the hopper based on the weight detected by the detection device, and sends a drive signal to the drive unit to drive the blade unit for a predetermined period of time according to the calculated weight.

4. The ready-mixed concrete supply device according to any one of claims 1 to 3, wherein the connecting portion is annular and is arranged so as to surround the upper end of the hopper.

5. A hopper having a truncated cone-shaped peripheral portion that expands in diameter toward the top, a cylindrical portion formed integrally with the peripheral portion at the top, and an opening facing downward; a blade portion rotatable inside the circumferential portion; a connecting portion rotatably supported along an outer periphery of the cylindrical portion; a drive unit disposed outside the hopper and configured to transmit a rotational force to the connecting unit; A ready-mixed concrete supply device comprising: The blade portion extends along the inner peripheral surface of the hopper, a tip portion is connected to the connecting portion, and has a main surface and an end surface perpendicular to the main surface, the main surface is adjacent to an inner peripheral surface of the hopper, A ready-mixed concrete supply device in which the end face is located on the rotation direction side of the blade portion.

6. A hopper having a truncated cone-shaped peripheral portion that expands in diameter toward the top, a cylindrical portion formed integrally with the peripheral portion at the top, a first flange that protrudes in an annular shape, and an opening facing downward; a blade portion rotatable inside the circumferential portion; a connecting portion rotatably supported along an outer periphery of the cylindrical portion; a drive unit disposed outside the hopper and configured to transmit a rotational force to the connecting unit; A ready-mixed concrete supply device comprising: The blade portion extends along the inner peripheral surface of the hopper and has a tip portion connected to the connecting portion, The first flange supports the connecting portion from below via a roller rotatably attached to the connecting portion.

7. The hopper further includes a second flange disposed above the first flange, The ready-mixed concrete supply device according to claim 6, wherein the second flange is located above the roller.

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