Concrete compaction device for manufacturing irregularly shaped concrete blocks

Abstract

The objective of this invention is to provide a concrete compaction device with a simple structure that allows for adjustment of the opening degree of a concrete vibrator within the formwork device without requiring complicated operations when compacting concrete poured into a formwork device for irregularly shaped concrete blocks. [Solution] This invention is configured such that the upper end of an upper link 51 is rotatably attached to an upper frame 31 provided on the upper end side of the telescopic portion 23 of an axially extendable support shaft 2, and the lower end of a lower link 52 is rotatably attached to a lower frame 32 provided on the lower end side of the telescopic portion 23. The lower end of the upper link 51 and the upper end of the lower link 52 are rotatably connected, a concrete vibrator 6 is non-rotatably attached to the upper link 51, and support legs 4 are provided below the lower frame 32.

Description

Technical Field

[0001] The present invention relates to a concrete compaction device used when manufacturing a shaped concrete block such as a wave-dissipating block.

Background Art

[0002] Conventionally, when manufacturing a shaped concrete block such as a wave-dissipating block, concrete is placed in a formwork device for forming a concrete block of a desired shape, and after compacting the placed concrete using a concrete vibrator, it has been carried out by demolding after the concrete has hardened. In particular, when manufacturing a large-sized shaped concrete block, since the bulk of the concrete placed in the formwork device increases, it has been manufactured by repeatedly performing the placing and compacting operations of the concrete in several layers.

[0003] By the way, since the placing port for placing concrete in the formwork device for manufacturing a shaped concrete block is provided at the top of the formwork device, when performing the compaction operation of the concrete placed in the formwork device, there is a problem that there are places where the concrete vibrator cannot reach only by the operator inserting and operating the concrete vibrator from the placing port, and sufficient compaction cannot be achieved.

[0004] To solve these problems, Japanese Patent Publication No. 9-57730 proposes a concrete pouring device for four-legged blocks equipped with an opening adjustment mechanism that allows adjustment of the opening of a concrete vibrator within the formwork device. According to this invention, since the concrete vibrator is pivotally attached to an opening adjustment arm which is pivotally attached to a ring member that moves up and down by the rotation of a winch, the opening of the concrete vibrator with respect to the vertical axis (axis of the concrete pouring cylinder) can be appropriately adjusted by operating the winch to raise and lower the ring member. Therefore, by operating the winch so that the opening of the concrete vibrator is larger at the position corresponding to each leg of the four-legged block, there will be no areas that the concrete vibrator cannot reach, and compaction can be reliably performed.

[0005] However, in this invention, in order to adjust the opening degree of the concrete vibrator, a winch must be installed to raise and lower the ring member separately from the raising and lowering operation of the concrete pouring cylinder, resulting in a complex structure and cumbersome operation. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 9-57730 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0007] The objective of this invention is to provide a concrete compaction device with a simple structure that allows for adjustment of the opening degree of a concrete vibrator within the formwork device without requiring complicated operations when compacting concrete poured into a formwork device for irregularly shaped concrete blocks. [Means for solving the problem]

[0008] The concrete compaction device for manufacturing irregularly shaped concrete blocks according to this invention is configured such that the upper end of an upper link is rotatably attached to an upper frame provided on the upper end side of the telescopic section of an axially extendable support shaft, and the lower end of a lower link is rotatably attached to a lower frame provided on the lower end side of the telescopic section, and the lower end of the upper link and the upper end of the lower link are rotatably connected, a concrete vibrator is non-rotatably attached to the upper link, and support legs are provided below the lower frame.

[0009] The invention of claim 2 is characterized in that the support leg is made of a float member having a specific gravity lighter than water.

[0010] The invention of claim 3 is characterized in that the concrete vibrator is slidably attached to the upper link. [Effects of the Invention]

[0011] According to this invention, the opening of the concrete vibrator relative to the vertical axis (the axis of the support shaft) can be adjusted by utilizing the extension and retraction movement of the support shaft and the rotational movement of the link mechanism, which consists of upper and lower links. That is, when the upper frame is suspended and the support shaft is extended, the lower end of the upper link rotates toward the support shaft, and in conjunction with this, the concrete vibrator also rotates toward the axis of the support shaft. When the support shaft is fully extended (when the support legs are not touching the ground and the entire device is completely suspended in mid-air), the concrete vibrator is positioned closest to the axis of the support shaft, and the opening of the concrete vibrator relative to the vertical axis is at its smallest. On the other hand, when the suspension of the upper frame is loosened and the support shaft is retracted with the support legs on the ground, the lower end of the upper link rotates toward the support shaft, and in conjunction with this, the concrete vibrator also rotates toward the axis of the support shaft. Furthermore, when the support shaft is in its most retracted state (when the support legs are on the ground and the suspension of the upper frame is completely loosened), the concrete vibrator is positioned furthest from the axis of the support shaft, resulting in the largest opening of the concrete vibrator relative to the vertical axis. Therefore, according to this invention, the opening of the concrete vibrator can be adjusted simply by adjusting the suspension state of the upper frame.

[0012] Furthermore, since support legs are provided below the lower frame, if the volume of concrete poured into the formwork device is within the length of the support legs, the poured concrete will not cover the portion above the lower frame even when the support legs are grounded to the bottom of the formwork device, allowing for reliable adjustment of the opening of the concrete vibrator.

[0013] According to the invention of claim 2, since the support legs are made of float members with a specific gravity lighter than water, the lower frame can be floated by buoyancy when the volume of the poured concrete exceeds the length of the support legs, and the lower frame can be held above the surface of the poured concrete even if the support legs are not in contact with the bottom surface of the formwork device. As a result, the opening degree of the concrete vibrator can be reliably adjusted even when the volume of poured concrete is high.

[0014] According to the invention of claim 3, since the concrete vibrator is slidably mounted on the upper link, the position of the concrete vibrator can be adjusted in the longitudinal direction. [Brief explanation of the drawing]

[0015] [Figure 1] This figure shows an overview of an embodiment of this invention. [Figure 2] Similarly, a plan view with the concrete vibrator open to its maximum position. [Figure 3] This diagram also shows a set of linkage mechanisms and the mounting structure for a concrete vibrator. [Figure 4] This diagram also shows the compaction process of the first layer of poured concrete. [Figure 5] This diagram also shows the compaction work of the second layer. [Modes for carrying out the invention]

[0016] Figures 1 to 3 show an overview of an embodiment of this invention. This embodiment applies the present invention to a concrete compaction device for manufacturing irregularly shaped concrete blocks used in the production of four-legged wave-dissipating blocks such as "Tetrapod" (registered trademark).

[0017] In this embodiment, the concrete compaction device 1 for manufacturing irregularly shaped concrete blocks has an upper frame 31 attached to the upper end and a lower frame 32 attached to the lower end of the expandable portion 23 of a support shaft 2 that can expand and contract axially due to its own weight, and is supported by support legs 4 disposed below the lower frame 32. The support shaft 2 has a first shaft member 21 and a second shaft member 22 that are connected so as to be slidable in the axial direction, and has an expandable portion 23 that expands and contracts as the first shaft member 21 and the second shaft member 22 slide against each other. This expandable portion 23 is covered with a bellows cover. The support legs 4 are provided with three float members, which have a specific gravity lighter than water, arranged at 120° intervals around the axis of the support shaft 2. The upper ends of three upper links 51 are rotatably mounted on the upper frame 31, and the lower ends of three lower links 52 are rotatably mounted on the lower frame 32, both at 120° intervals around the axis of the support shaft 2. The corresponding lower ends of the upper links 51 and upper ends of the lower links 52 are rotatably connected. The link mechanism 5, composed of the upper links 51 and lower links 52, is configured to form a "V" shape that protrudes slightly in the direction opposite to the support shaft 2 when the support shaft 2 is at its maximum extension. Furthermore, a concrete vibrator 6 is attached to each of the three upper links 51 via a mounting sleeve 7 so as to be non-rotatable and slidable relative to the upper link 51.

[0018] The concrete vibrator 6 is constructed by attaching a rod-shaped vibrator 62 to the tip of a rod-shaped support member 61. The side surface of the support member 61 is provided with a locking pin 611 that is detachably locked to a receiving plate 8 provided on the lower link 52, and a rotation prevention pin 612 that is slidably locked into an elongated hole 71 of a mounting sleeve 7 provided on the upper link 51, preventing the support member 61 from rotating within the mounting sleeve 7. In addition, an end stopper 613 is provided on the base end of the support member 61 to prevent the support member 61 from falling out of the mounting sleeve 7.

[0019] Furthermore, three power supply units 9 that supply driving power to each concrete vibrator 6 are attached to the upper surface of the upper frame 31, and three hooks (not shown in the illustration) for suspending the device with a crane or the like are provided.

[0020] In the concrete compaction device 1 for manufacturing the irregular concrete block configured as described above, when a rope is attached to the hook provided on the upper surface of the upper frame 31 and suspended by a crane or the like, the support shaft 2 gradually extends, and accordingly, the lower part of the upper link 51 and the upper part of the lower link 52 rotate in the direction of the support shaft 2. Since the concrete vibrator 6 is non-rotatably attached to the upper link 51, when the lower part of the upper link 51 rotates toward the support shaft 2, the lower part of the concrete vibrator 6 also rotates in the direction of the axis of the support shaft 2, and the opening degree of the concrete vibrator 6 with respect to the vertical axis of the support shaft 2 becomes smaller. And in the state where the support shaft 2 is fully extended, the opening degree of the concrete vibrator 6 becomes the smallest (FIG. 1(a)). Note that the concrete vibrator 6 and the support leg 4 are arranged so as to have a positional relationship in which they do not interfere with each other when the opening degree of the concrete vibrator 6 is the smallest. Further, when the opening degree of the concrete vibrator 6 is the smallest, by locking the locking pin 611 provided on the support member 61 of the concrete vibrator 6 to the receiving plate 8 provided on the lower link 52, the concrete vibrator 6 can be stored on the upper side, and when the concrete compaction device 1 is suspended in the formwork device and the support leg 4 is grounded, it is possible to prevent the rod-shaped vibrating body 62 from grounding before the support leg 4.

[0021] When the suspension by a crane or the like is gradually released with the support leg 4 grounded on the other side, the support shaft 2 gradually expands and contracts, and accordingly, the lower part of the upper link 51 and the upper part of the lower link 52 rotate in a direction away from the support shaft 2. When the lower part of the upper link 51 rotates in a direction away from the support shaft 2, the lower part of the concrete vibrator 6 fixedly attached to the upper link 51 also rotates in a direction away from the support shaft 2, and the opening degree of the concrete vibrator 6 with respect to the vertical axis of the support shaft 2 increases. And in the state where the support shaft 2 is completely extended, the opening degree of the concrete vibrator 6 becomes the largest (Fig. 1(b)). Incidentally, when the opening degree of the concrete vibrator 6 increases, the proximal ends of the support members 61 are arranged so as to face in a direction slightly deviated from the central axis (axis of the support shaft 2) O of the concrete compacting device 1 so that the proximal ends of the support members 61 do not interfere with each other (see Fig. 2). Also, in the process of the opening degree of the concrete vibrator 6 gradually increasing, the locking pin 611 provided on the support member 61 disengages from the receiving plate 8 and the locking state is released, and the concrete vibrator 6 slides in the distal direction (the direction of the rod-shaped vibrator 62) until the end stopper 613 abuts against the edge 72 of the mounting sleeve 7. Thereby, the rod-shaped vibrator 62 can be extended distally. In addition, since the rotation prevention pin 612 of the support member 61 is slidably locked in the long hole 71 of the mounting sleeve 7, there is no possibility that the support member 61 rotates in the circumferential direction within the mounting sleeve 7.

[0022] Figs. 4 and 5 are views showing the state of the compacting operation when manufacturing a four-legged block using the concrete compacting device 1 for manufacturing a deformed concrete block of this embodiment.

[0023] Figure 4 shows the compaction process of the first layer of concrete C1 poured into the formwork device. First, the compaction device 1, suspended by a crane or the like, is lowered from the pouring opening (top) of the formwork device, where the ready-mix concrete has been poured to a height of about 50 cm, and the support legs 4 are brought into contact with the bottom surface of the formwork device (Figure 4(a)). In this state, as the suspension by the crane or the like is loosened, the support shaft 2 gradually shortens, and the lower part of the upper link 51 rotates away from the support shaft 2, and the concrete vibrator 6 also rotates away from the support shaft 2 as a result. During this process, the locking pin 611 provided on the support member 61 of the concrete vibrator 6 comes off the receiving plate 8 of the lower link 52, and the concrete vibrator 6 slides diagonally downward until the end stopper 613 contacts the end edge 72 of the mounting sleeve 7. By compacting in this state, the tip ends of the legs of the four-legged block can be compacted (Figure 4(b)). Once compaction of the tip ends of the legs is complete, the upper frame 31 is lifted with a crane or the like to reduce the opening of the concrete vibrator 6 and compaction of the middle section of the legs is performed (Figure 4(c)). After compaction of the middle section of the legs is complete, the upper frame 31 is lifted again to further reduce the opening of the concrete vibrator 6 and compaction of the central section is performed, completing the compaction work for the first layer (Figure 4(d)). After the compaction work for the first layer is completed, the compaction device 1 is temporarily lifted out of the formwork device in order to pour the second layer of concrete.

[0024] Figure 5 shows the compaction of the second layer of concrete C2 poured into the formwork device. After the compaction of the first layer of poured concrete C1 is complete, a second layer of ready-mixed concrete of the same volume as the first layer is poured on top of it. The compaction device 1, which is suspended by a crane or the like from the pouring opening (top) of the formwork device, is lowered again so that the lower part of the support legs 4 reaches the second layer of poured concrete C2. Since the support legs 4 are made of float members made of a material lighter than water, buoyancy acts on them and the lower frame 32 is supported while floating on the surface of the second layer of poured concrete C2 (Figure 5(a)). If the suspension by the crane or the like is further loosened in this state, the support shaft 2 will gradually shorten and the lower part of the upper link 51 will rotate away from the support shaft 2, and the concrete vibrator 6 will also rotate away from the support shaft 2 together with the upper link 51. In this process, the locking pin 611 detaches from the receiving plate 8 and the concrete vibrator 6 slides downward, just as in the case of the first layer. By compacting in this state, the tip of the legs of the four-legged block can be compacted (Figure 5(b)). After compaction of the tip of the legs is complete, the upper frame 31 is lifted and the opening of the concrete vibrator 6 is gradually reduced and compaction is performed, so that compaction can be performed sequentially from the outside to the inside (Figure 5(c)(d)). By repeating this process in the same way for the third layer and beyond, the concrete poured into the formwork device can be sufficiently compacted without any areas being missed by the concrete vibrator 6.

[0025] In this embodiment, three concrete vibrators 6 are arranged at 120° intervals around the axis of the support shaft 2. However, the number and position of the concrete vibrators 6 arranged around the axis of the support shaft 2 can be appropriately selected according to the shape of the irregularly shaped concrete block. [Industrial applicability]

[0026] This invention relates to a concrete compaction device with a simple structure that allows for adjustment of the opening degree of a concrete vibrator within a formwork device for irregularly shaped concrete blocks without requiring complicated operations, and has industrial applicability. [Explanation of Symbols]

[0027] 1. Concrete compaction device for manufacturing irregularly shaped concrete blocks 2 Support shaft 21 First shaft member 22 2nd shaft member 23 Telescopic part 31 Upper frame 32 Bottom frame 4 Support legs 5 Link mechanism 51 Link above 52 See link below 6. Concrete vibrator 61 Support member 611 Locking pin 612 Anti-rotation pin 613 End stopper 62. Rod-shaped vibrator 7 Mounting sleeve 71 long hole 72 Edge 8 Receiving plate 9 Power supply C1 Placed Concrete, First Layer C2 poured concrete, second layer

Claims

1. The upper end of the upper link is rotatably attached to an upper frame provided on the upper end side of the extension portion of the axially extendable support shaft, and the lower end of the lower link is rotatably attached to a lower frame provided on the lower end side of the extension portion, and the lower end of the upper link and the upper end of the lower link are rotatably connected. The aforementioned upper link is non-rotatably mounted to the concrete vibrator. Support legs are provided below the aforementioned lower frame. Concrete compaction device for manufacturing irregularly shaped concrete blocks.

2. The concrete compaction device for manufacturing irregularly shaped concrete blocks according to claim 1, wherein the support legs are composed of float members having a specific gravity lighter than water.

3. The concrete compaction device for manufacturing irregularly shaped concrete blocks according to claim 1 or 2, wherein the concrete vibrator is slidably mounted on the upper link.

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