Concrete compaction equipment for manufacturing special shaped concrete blocks

Abstract

The object of the present invention is to provide a concrete compaction device having a simple structure that enables adjustment of the opening degree of a concrete vibrator within a formwork device for deformed concrete blocks without requiring complicated operations when compacting concrete poured into the formwork device. [Solution] This invention is configured by rotatably attaching the upper end of an upper link 51 to an upper frame 31 provided on the upper end side of the extension section 23 of a support shaft 2 that is axially extendable and retractable, and the lower end of a lower link 52 to a lower frame 32 provided on the lower end side of the extension section 23, and rotatably connecting the lower end of the upper link 51 and the upper end of the lower link 52. A concrete vibrator 6 is non-rotatably attached to the upper link 51, and a support leg 4 is arranged below the lower frame 32.

Description

[Technical field]

[0001] The present invention relates to a concrete compaction device used in manufacturing special-shaped concrete blocks such as wave-dissipating blocks. [Background technology]

[0002] Conventionally, when manufacturing irregular concrete blocks such as wave dissipating blocks, concrete is poured into a formwork device for forming a concrete block of a desired shape, the poured concrete is compacted using a concrete vibrator, and the concrete is removed from the form after it has hardened. In particular, when manufacturing large irregular concrete blocks, the volume of concrete poured into the formwork device increases, so the concrete is poured and compacted repeatedly in several layers to manufacture the blocks.

[0003] However, the pouring port for pouring concrete into the formwork device for manufacturing deformed concrete blocks is located at the top of the formwork device, so when compacting the concrete poured into the formwork device, if an operator simply inserts a concrete vibrator through the pouring port and operates it, there will be areas that the concrete vibrator cannot reach, and sufficient compaction will not be achieved.

[0004] To solve these problems, Japanese Patent Application Laid-Open No. 9-57730 proposes a concrete pouring device for four-legged blocks equipped with an opening adjustment mechanism that can adjust the opening of the concrete vibrator within the formwork device. According to this invention, the concrete vibrator is pivotally attached to an opening adjustment arm that is pivotally attached to a ring member that is raised and lowered by rotating the winch, so that the opening of the concrete vibrator relative to the vertical axis (the axis of the concrete pouring tube) 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 large at positions corresponding to each leg of the four-legged block, no areas are left unreached by the concrete vibrator, and compaction can be performed reliably.

[0005] However, in this invention, in order to adjust the opening of the concrete vibrator, a winch must be provided to raise and lower the ring member separately from the raising and lowering operation of the concrete pouring tube, which makes the structure complicated and the operation cumbersome. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 9-57730 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a concrete compaction device having a simple structure that enables adjustment of the opening degree of a concrete vibrator within a formwork device for deformed concrete blocks without requiring complicated operations when compacting concrete poured into the formwork device. [Means for solving the problem]

[0008] The concrete compaction device for manufacturing deformed concrete blocks of this invention is configured by rotatably attaching the upper end of an upper link to an upper frame provided on the upper end of the extension section of a support shaft that is axially extendable and contractible, and the lower end of a lower link to a lower frame provided on the lower end of the extension section, and rotatably connecting the lower end of the upper link and the upper end of the lower link.A concrete vibrator is non-rotatably attached to the upper link, and support legs are arranged below the lower frame.

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

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

[0011] According to this invention, the opening degree of the concrete vibrator relative to the vertical axis (axis of the support shaft) can be adjusted by utilizing the extension and contraction movement of the support shaft and the rotation movement of the link mechanism composed of the 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 in a direction approaching the support shaft, and the concrete vibrator rotates in the axial direction of the support shaft in conjunction with this. When the support shaft is fully extended (when the support legs are not on the ground and the entire device is completely suspended in mid-air), the concrete vibrator is located on the side closest to the axis of the support shaft, and the opening degree 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 contracted with the support legs on the ground, the lower end of the upper link rotates in a direction away from the support shaft, and the concrete vibrator rotates in a direction away from the axis of the support shaft in conjunction with this. When the support shaft is in its most contracted state (when the support legs are on the ground and the suspension of the upper frame is completely loosened), the concrete vibrator is located at the farthest side from the axis of the support shaft, and the opening angle of the concrete vibrator relative to the vertical axis is at its largest. Therefore, according to this invention, the opening angle of the concrete vibrator can be adjusted simply by adjusting the suspension state of the upper frame.

[0012] In addition, since support legs are arranged below the lower frame, as long as the volume of concrete poured into the formwork device is within the range of the length of the support legs, even if the support legs are grounded to the bottom of the formwork device, the poured concrete will not cover the area above the lower frame, and the opening angle of the concrete vibrator can be reliably adjusted.

[0013] According to the invention of claim 2, since the support legs are made of float members that have a specific gravity lighter than water, the lower frame can be floated by buoyancy when the volume of 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. This makes it possible to reliably adjust the opening degree of the concrete vibrator even when the volume of poured concrete is high.

[0014] According to the invention of claim 3, the concrete vibrator is slidably attached to the upper link, so that the position of the concrete vibrator can be adjusted in the length direction. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a diagram showing an outline of an embodiment of the present invention. [Diagram 2] Plan view of the concrete vibrator at maximum opening. [Diagram 3] A diagram showing the mounting structure of a set of link mechanisms and a concrete vibrator. [Figure 4] A diagram showing the compaction work of the first layer of poured concrete. [Diagram 5] A similar image showing the compaction work for the second layer. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] 1 to 3 are diagrams showing an outline of an embodiment of the present invention, in which the present invention is applied to a concrete compaction device for manufacturing irregular concrete blocks used in manufacturing four-legged wave-dissipating blocks such as "Tetrapod" (registered trademark).

[0017] In this embodiment, the concrete compaction device 1 for manufacturing irregular concrete blocks has an upper frame 31 attached to the upper end side of the expansion section 23 of the support shaft 2 that can expand and contract in the axial direction under its own weight, and a lower frame 32 attached to the lower end side, 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 connected to be slidable in the axial direction, and is provided with an expansion section 23 that expands and contracts when the first shaft member 21 and the second shaft member 22 slide against each other. The expansion section 23 is covered with a bellows cover. The support legs 4 are provided with three float members that have a specific gravity lighter than water and are arranged at 120° intervals around the axis of the support shaft 2. The upper ends of three upper links 51 are attached to the upper frame 31, and the lower ends of three lower links 52 are attached to the lower frame 32, all of which are rotatably attached at intervals of 120° around the axis of the support shaft 2, and the lower ends of the corresponding upper links 51 are rotatably connected to the upper ends of the lower links 52. The link mechanism 5 formed by the upper links 51 and the lower links 52 is configured so as to have a "L" shape that protrudes slightly in the direction opposite to the support shaft 2 when the support shaft 2 is fully extended. 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 but slidable relative to the upper link 51.

[0018] The concrete vibrator 6 is constructed by attaching a rod-shaped vibrating body 62 to the tip of a rod-shaped support member 61, and 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 in a long hole 71 of a mounting sleeve 7 provided on the upper link 51 and prevents the support member 61 from rotating inside the mounting sleeve 7 are provided on the side of the support member 61. In addition, an end stopper 613 that prevents the support member 61 from falling off the mounting sleeve 7 is provided on the base end side of the support member 61.

[0019] In addition, 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) for suspending the device by a crane or the like are also provided.

[0020] In the concrete compaction device 1 for manufacturing deformed concrete blocks constructed as described above, when a rope is attached to a hook provided on the upper surface of the upper frame 31 and the device is 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 toward the support shaft 2 side. Since the concrete vibrator 6 is attached to the upper link 51 so as not to rotate, when the lower part of the upper link 51 rotates toward the support shaft 2 side, the lower part of the concrete vibrator 6 also rotates toward the axis line of the support shaft 2, and the opening degree of the concrete vibrator 6 relative to the vertical axis of the support shaft 2 becomes small. When the support shaft 2 is fully extended, the opening degree of the concrete vibrator 6 becomes smallest (Fig. 1(a)). The concrete vibrator 6 and the support leg 4 are disposed in a positional relationship such that they do not interfere with each other when the opening degree of the concrete vibrator 6 is smallest. In addition, when the concrete vibrator 6 is at its minimum opening, the locking pin 611 on the support member 61 of the concrete vibrator 6 can be locked to the receiving plate 8 on the lower link 52, thereby allowing the concrete vibrator 6 to be stored at the upper side. When the concrete compaction device 1 is suspended within the formwork device and the support leg 4 is grounded, the rod-shaped vibrating body 62 can be prevented from touching the ground before the support leg 4.

[0021] On the other hand, when the suspension by the crane or the like is loosened while the support leg 4 is on the ground, the support shaft 2 gradually 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 attached to the upper link 51 so as not to rotate 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. When the support shaft 2 is in a completely contracted state, the opening degree of the concrete vibrator 6 is the largest (FIG. 1(b)). Note that the base ends of the support members 61 are arranged to face in a direction slightly offset from the central axis O of the concrete compaction device 1 (the axis of the support shaft 2) so that the base ends of the support members 61 do not interfere with each other when the opening degree of the concrete vibrator 6 increases (see FIG. 2). Furthermore, as the opening of the concrete vibrator 6 gradually increases, the locking pin 611 provided on the support member 61 comes off the receiving plate 8, releasing the locked state, and the concrete vibrator 6 slides toward the tip (toward the rod-shaped vibrating body 62) until the end stopper 613 abuts against the edge 72 of the mounting sleeve 7. This allows the rod-shaped vibrating body 62 to be extended farther. In addition, since the rotation prevention pin 612 of the support member 61 is slidably engaged within the long hole 71 of the mounting sleeve 7, there is no risk of the support member 61 rotating circumferentially within the mounting sleeve 7.

[0022] 4 and 5 are diagrams showing the state of compaction work when manufacturing a four-legged block using the concrete compaction device 1 for manufacturing deformed concrete blocks of this embodiment.

[0023] FIG. 4 is a diagram showing the compaction of the first layer of concrete C1 poured in the formwork device. First, the compaction device 1 suspended by a crane or the like is hung down from the pouring port (top) of the formwork device where fresh concrete is poured to a height of about 50 cm, and the support legs 4 are placed on the bottom surface of the formwork device (FIG. 4(a)). In this state, when the suspension by the crane or the like is loosened, the support shaft 2 gradually contracts and the lower part of the upper link 51 rotates in a direction away from the support shaft 2, and accordingly the concrete vibrator 6 also rotates in a direction away from the support shaft 2. 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, so that the concrete vibrator 6 slides diagonally downward until the end stopper 613 abuts against the end edge 72 of the mounting sleeve 7. By performing compaction 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, the opening of the concrete vibrator 6 is reduced, and the middle region of the legs is compacted (Figure 4(c)). After compaction of the middle region of the legs is complete, the upper frame 31 is lifted again and the opening of the concrete vibrator 6 is further reduced, compacting the central region, and compaction work for the first layer is completed (Figure 4(d)). After compaction work for the first layer is completed, the compaction device 1 is temporarily pulled up outside the formwork device in order to pour the second layer of concrete.

[0024] FIG. 5 is a diagram showing the compaction of the second layer of concrete C2 cast in the formwork device. A second layer of fresh concrete of the same volume as the first layer is poured on top of the first layer of cast concrete C1 after the compaction work is completed, and the compaction device 1 suspended by a crane or the like is lowered again from the casting port (top) of the formwork device so that the lower part of the support leg 4 reaches the second layer of cast concrete C2. Since the support leg 4 is constructed using a float member made of a material lighter than water, buoyancy acts and the lower frame 32 is supported in a floating state on the surface of the second layer of cast concrete C2 (FIG. 5(a)). In this state, if the suspension state by the crane or the like is further loosened, the support shaft 2 gradually contracts and the lower part of the upper link 51 rotates in a direction away from the support shaft 2, and the concrete vibrator 6 also rotates in a direction away from the support shaft 2 together with the upper link 51. During this process, the locking pin 611 comes off the receiving plate 8 and the concrete vibrator 6 slides downward, just as in the first layer. By performing compaction in this state, the leg tip sides of the four-legged block can be compacted (Fig. 5(b)). After compaction of the leg tip sides is complete, the upper frame 31 is lifted and the opening of the concrete vibrator 6 is gradually reduced to perform compaction, allowing compaction to be performed in sequence from the outside to the inside (Figs. 5(c)(d)). By repeating this process in the same way for the third and subsequent layers, the concrete poured in the formwork device can be sufficiently compacted without any areas being left unreachable 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, but the number and arrangement positions of the concrete vibrators 6 arranged around the axis of the support shaft 2 can be selected appropriately according to the shape of the irregular concrete block. [Industrial Applicability]

[0026] This invention relates to a concrete compaction device of simple structure that enables the opening degree of a concrete vibrator to be adjusted within a formwork device without the need for complicated operations when compacting concrete poured into a formwork device for deformed concrete blocks, and has industrial applicability. [Explanation of symbols]

[0027] 1. Concrete compaction equipment for manufacturing special-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 Top link 52 Downlink 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 Support plate 9 Power supply C1 First layer of poured concrete C2 Second layer of poured concrete

Claims

1. An upper end of an upper link is rotatably attached to an upper frame provided on an upper end side of an extension / contraction section of a support shaft that is extendable and contractable in an axial direction, and a lower end of a lower link is rotatably attached to a lower frame provided on a lower end side of the extension / contraction section, and the lower end of the upper link and the upper end of the lower link are rotatably connected to each other. A concrete vibrator is attached to the upper link so as not to be rotatable. Support legs are provided below the lower frame. Concrete compaction equipment for manufacturing special-shaped concrete blocks.

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

3. 3. A concrete compaction device for producing deformed concrete blocks according to claim 1 or 2, wherein the concrete vibrator is slidably attached to the upper link.

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