Concrete block installation equipment

Abstract

The present invention provides a concrete block installation device that can be applied to concrete blocks of general shapes and can be installed regardless of the levelness of the installation surface. [Solution] An installation device used for installing concrete blocks 39, comprising a flat plate-shaped first plate 35, an adhesive 36 formed on the first plate 35, a plurality of fine spheres or granular steel balls 23 held in place by being scattered on the formed adhesive 26, and a flat plate-shaped second plate 37 placed on the fine hard balls 23 and positioned opposite the first plate 35.

Description

Technical Field

[0001] The present invention relates to an installation tool for concrete blocks, and particularly to an installation tool for concrete blocks related to the installation and horizontal movement of precast concrete blocks such as box culverts.

Background Art

[0002] FIG. 12 is a schematic view of a method for installing concrete blocks disclosed in Japanese Patent Laid-Open No. 2000-273938, FIG. 13 is a cross-sectional view taken along line XIII-XIII of FIG. 12, and FIG. 14 is an enlarged view of the “Y” portion of FIG. 13.

[0003] Referring to these figures, box culverts 61a to 61c, which are precast concrete blocks with a hollow center, are installed in a state of being sequentially connected on the foundation concrete 19. The box culvert 61d, which is locked and lifted by the wire 18, is suspended near the box culvert 61c from above. Then, it is pulled in the direction indicated by the horizontal arrow and moves in a connected state like the box culverts 61a to 61c.

[0004] In order to reduce the frictional resistance with the foundation concrete 19 during this horizontal movement, the lower part of the box culvert 61 has a special shape. That is, as shown in FIG. 14, a protrusion 62 protruding downward is formed on the lower surface of the box culvert 61, and a steel plate 63 is attached to the surface of the protrusion 62. On the other hand, a guide rail 65 made of I-shaped steel is embedded in the foundation concrete 19, and a plurality of steel balls 66 are arranged on its upper surface.

[0005] With the box culvert 61 and foundation concrete 19 formed in this manner, the box culvert 61 is installed on the foundation concrete 19 so that the projection 62 is positioned on the guide rail 65. When the box culvert 61 is moved horizontally in this state, the bearing effect of the steel ball 66 reduces the resistance to horizontal movement, allowing the box culverts 61 to be smoothly connected to each other.

[0006] Typically, after the box culverts 61 are pulled together, further compaction work is performed to ensure a seal between them, and they become one unit. Then, the box culverts 61 are fixed to the foundation concrete 19 by pouring fluid ready-mix concrete between the lower part of the box culverts 61 and the upper surface of the foundation concrete 19. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2000-273938 [Overview of the project] [Problems that the invention aims to solve]

[0008] With the conventional concrete block installation method described above, it is necessary to finish the box culvert 61 in a special shape, such as by providing a protrusion 62 at the bottom of the box culvert 61, as mentioned above. Therefore, it is less costly than a normal box culvert 61.

[0009] Furthermore, since the guide rails 65 must be embedded in the foundation concrete 19 in order to position the steel balls 66, this work is time-consuming and consequently increases costs. Moreover, since the steel balls 66 are positioned on the upper surface of the guide rails 65, if the horizontality of the guide rails 65 is not ensured, the balls may not be evenly distributed and may be biased in one direction. For this reason, this construction method is difficult to adopt if the installation surface of the box culvert 61 is sloped, rather than being horizontal.

[0010] This invention was made to solve the above-mentioned problems, and aims to provide a concrete block installation device that can be applied to concrete blocks of general shapes and is not affected by the horizontality of the installation surface. [Means for solving the problem]

[0011] A first aspect of the present invention is an installation device used for installing concrete blocks, comprising a first flat plate, an adhesive formed on the first flat plate, a plurality of hard balls consisting of fine spheres or granular steel balls held in place by being scattered on the formed adhesive, and a second flat plate positioned on top of the held hard balls and facing the first flat plate.

[0012] With this configuration, the hard balls held in place by the scattering process reduce the resistance of the first and second plates to movement on their respective surfaces.

[0013] Another aspect of the present invention is the configuration of the invention described in claim 1, wherein the adhesive is water-based glue, and each of the first and second plates is made of iron.

[0014] This configuration ensures a stable arrangement of the hardballs.

[0015] Another aspect of the present invention is the configuration of the invention described in claim 2, further comprising a limiting means for restricting the horizontal movement of the second plate relative to the first plate to a predetermined range.

[0016] With such a configuration, the displacement between the first flat plate and the second flat plate is within a certain range.

Effect of the Invention

[0017] The device according to claim 1 reduces the resistance to movement on the surface of each of the first flat plate and the second flat plate. Therefore, the horizontal movement of the concrete block can be facilitated simply by directly attaching it between the concrete block to be installed and the foundation concrete. Also, since the hard spheres are held by the adhesive by spraying, the arrangement density can be freely adjusted according to the usage situation.

[0018] The device according to claim 2, in addition to the effect of the device according to claim 1, has a stable arrangement state of the hard spheres and becomes an instrument that is easy to carry.

[0019] The device according to claim 3, in addition to the effect of the device according to claim 2, has the displacement between the first flat plate and the second flat plate within a certain range. Therefore, the correctness of the installation state of the concrete block can be judged and the safety of the installation state can be ensured.

Brief Description of the Drawings

[0020] [Figure 1] It is a view showing an outline of the method for installing the concrete block of this device. [Figure 2] It is a cross-sectional view taken along the line II-II of FIG. 1. [Figure 3] It is an enlarged view of the “X” part of FIG. 2. [Figure 4] It is an enlarged cross-sectional view taken along the line IV-IV of FIG. 3. [Figure 5] It is a view showing a schematic process of the method for installing the concrete block according to another embodiment of this device. [Figure 6] It is a view showing a modification of the installation method according to the process shown in FIG. 5. [Figure 7] It is a plan view showing a schematic structure of the installation instrument for the concrete block of this device. [Figure 8]It is a cross-sectional view taken along line VIII-VIII of FIG. 7. [Figure 9] It is a plan view showing the schematic structure of the installation tool for the concrete block of this invention. [Figure 10] It is a plan view showing the schematic structure of the installation tool for the concrete block according to another embodiment of this invention. [Figure 11] It is a cross-sectional view taken along line XI-XI of FIG. 10. [Figure 12] It is a view showing an outline of a conventional method for installing a concrete block. [Figure 13] It is a cross-sectional view taken along line XIII-XIII of FIG. 12. [Figure 14] It is an enlarged view of the "Y" part of FIG. 13.

Embodiments for Carrying Out the Invention

[0021] FIG. 1 is a schematic view showing the method for installing the concrete block of this invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, FIG. 3 is an enlarged view of the "X" part of FIG. 2, and further, FIG. 4 is an enlarged cross-sectional view taken along line IV-IV of FIG. 3.

[0022] Referring to these figures, a pair of guide rails 21a and guide rail 21b are installed on the foundation concrete 19, and box culverts 16a to 16c, which are one of the precast concrete blocks, are sequentially installed above them. Note that the guide rails 21a and guide rail 21b are embedded inside the foundation concrete 19 and are fixed on the anchors 25 whose level has been adjusted. Therefore, the box culvert 16 is in a state of being installed while ensuring the level of the guide rails 21a and guide rail 21b.

[0023] An adhesive 26, such as water-based glue, is formed on the upper surface of the horizontal member 27 of the guide rail 21b, and numerous fine steel balls (1-3 mm in diameter) or granular spheres (4-12 mm) 23, such as those used for sandblasting, are scattered and arranged on this adhesive 26 (3-100 per 100 cm²). In this embodiment, the box culvert 16, which is secured by a wire 18, is suspended from a certain position and moved horizontally to a predetermined position. Therefore, the adhesive 26 is formed on the entire upper surface of the horizontal member 27, and similarly, the fine steel balls 23 are arranged randomly or at predetermined intervals across the entire area of ​​the adhesive 26. Since the fine steel balls 23 are held in place by the adhesive 26, there is no risk of them moving to other positions on top of the horizontal member 27 after being placed.

[0024] A predetermined number of flat plates 22 are prepared, corresponding to the lower surface of the box culvert 16, and are positioned above the micro-steel balls 23 at the location where the box culvert 16 will be lowered. In this state, the box culvert 16 is lowered onto the flat plates 22. In this way, the box culvert 16 is installed on the horizontal member 27 via the micro-steel balls 23.

[0025] Next, the lowered box culvert 16 is moved horizontally using a winch or wire (not shown). At this time, as shown in Figure 4, the box culvert 16 moves relative to the horizontal member 27 together with the flat plate 22 via the micro steel balls 23, thus reducing the resistance to movement. This enables smooth movement of the box culvert 16. Note that the lower corner portion 29 of the flat plate 22 in the direction of travel, indicated by the arrow in Figure 4, is rounded to prevent the micro steel balls 23 from being worn down during movement.

[0026] Furthermore, during this movement, the vertical members 28 of the guide rail 21 act as guides, enabling stable horizontal movement of the box culvert 16. In this way, box culverts 16a to 16d are successively pulled together and connected, and then compaction is performed to ensure a seal at these connections. Even during this compaction work, the box culvert 16 moves smoothly due to the action of the micro-steel balls 23.

[0027] Once the compaction of box culverts 16a to 16d is complete, a fluid ready-mix concrete or mortar is poured between the lower part of box culverts 16a to 16d and the upper surface of the foundation concrete 19, fixing box culverts 16a to 16d to the foundation concrete 19 and completing the installation work.

[0028] Figure 5 is a schematic diagram illustrating a method for installing concrete blocks according to another embodiment of this invention, specifically a method for installing concrete blocks on a base formed on a foundation concrete.

[0029] Referring to the diagram, as shown in Figure 5(1), a flat plate-shaped first plate 35, such as a steel plate, is placed on a base 31 formed in the foundation concrete 19, whose upper surface level has been adjusted. Note that the base 31 does not necessarily need to be formed, and the first plate 35 may be placed directly on the foundation concrete 19.

[0030] Next, as shown in Figure 5(2), the first flat plate 35 is formed by applying an adhesive fluid such as water-based glue to its upper surface. Multiple fine steel balls 23, for example, those used for sandblasting, are dropped onto this adhesive 36 so that they are scattered almost uniformly. As a result, as shown in Figure 5(3), the fine steel balls 23 are held in place by the adhesive 36 and there is no risk of them moving unintentionally relative to the first flat plate 35. Therefore, the initial distribution state on the adhesive 36 is maintained.

[0031] Next, as shown in Figure 5(4), a second flat plate 37, made of a flat iron plate with substantially the same shape as the first flat plate 35, is installed so as to cover the micro-steel balls 23. This allows the first flat plate 35 and the second flat plate 37 to move easily across each other's surfaces via the micro-steel balls 23. With the micro-steel balls 23 sandwiched between the first flat plate 35 and the second flat plate 37 in this state, the precast concrete block 39 to be installed is placed on top of it as shown in Figure 5(5).

[0032] Therefore, the resistance generated by the horizontal movement of the precast concrete block 39 is reduced by the action of the micro-steel balls 23, enabling smooth horizontal movement adjustment. In this way, the installation and adjustment work of the precast concrete block 39 is completed.

[0033] Figure 6 shows an example of the installation state when a height adjustment fitting is used at the bottom of the concrete block, as shown in Figure 5, and when the foundation concrete 19 is sloped.

[0034] Referring to the diagram, in this example, the precast concrete block 39 is not placed directly on the second flat plate 37, but is installed on the second flat plate 37 via a height adjustment fitting 41 attached to the lower surface of the precast concrete block 39. The height adjustment fitting 41 has the function of changing the protruding length of the bolts that are screwed into both sides by rotating the nut in the center. The height adjustment fitting 41 may also be used upside down, or the upper bolt that is screwed into the nut may be made of the same shape as the lower one.

[0035] In this example, the precast concrete block 39 is adjusted to a predetermined height from the foundation concrete 19, and then the height adjustment fitting 41 is adjusted to match the distance between the bottom surface of the precast concrete block 39 and the second flat plate 37. In this state, the head of the lower bolt of the height adjustment fitting 41 abuts against the second flat plate 37.

[0036] Once the height adjustment of the precast concrete block 39 relative to the foundation concrete 19 is complete, it is then moved by a predetermined amount in the direction of the arrow, as shown in Figure 6 (2). In this case, the height adjustment fitting 41 attached to the bottom surface of the precast concrete block 39 moves easily in the direction of the arrow relative to the first plate 35, together with the second plate 37. In this case, although the top surface of the base 31 is inclined, the micro-steel balls 23 are held in place by the adhesive 36, so there is no risk of them moving relative to the first plate 35 due to this inclination. Therefore, the micro-steel balls 23 are held in their initially placed position, ensuring stable movement of the second plate 37 relative to the first plate 35.

[0037] Once the height and horizontal adjustments and movement of the precast concrete block 39 are completed in this manner, ready-mix concrete or mortar is poured between the bottom of the precast concrete block 39 and the top surface of the foundation concrete 19, fixing the precast concrete block 39 to the foundation concrete 19 in that state, and the installation work is completed. In the example of Figure 6, it is not necessarily required to form the base 31, and the first flat plate 35 may be placed directly on the foundation concrete 19.

[0038] Figure 7 is a schematic plan view of the concrete block installation device of this invention, and Figure 8 is a cross-sectional view of the line VIII-VIII in Figure 7.

[0039] Referring to these figures, the installation device according to this embodiment consists of a rectangular flat plate 35, an adhesive 36 such as water glue formed on the upper surface of the first flat plate 35, a plurality of fine steel balls 23 for sandblasting arranged so as to be scattered over almost the entire area of ​​the adhesive 36, a rectangular flat plate 37 placed on the fine steel balls 23 and arranged on top of the second flat plate 37, and corner pieces 43a to 43d that are L-shaped in plan view and attached to each corner of the first flat plate 35.

[0040] Furthermore, the height H of the corner pieces 43a to 43d from the first flat plate 35 is set to be smaller than the distance L between the upper surface of the second flat plate 37 mounted on the micro-steel ball 23 and the upper surface of the first flat plate 35. Also, as shown in Figure 7, the size of the second flat plate 37 in plan view is set to be a predetermined amount smaller than the rectangular shape defined by the inner surface positions of the corner pieces 43a to 43d.

[0041] When in use, the structure shown in Figures 7 and 8 is brought directly to the concrete block installation site, and the first flat plate 35 is placed in the designated position on the foundation concrete. Then, a concrete block (not shown) is placed so that its bottom surface rests on the upper surface of the second flat plate 37. In this case, since the bottom surface of the concrete block does not come into contact with the upper surfaces of the corner pieces 43a to 43d, the concrete block can be easily moved horizontally via the second flat plate 37.

[0042] As shown in Figure 7, the second flat plate 37 is surrounded at its corners by corner pieces 43a to 43d, and therefore its movement is restricted to within that range. Consequently, if the first flat plate 35 is placed in a predetermined position and the horizontal adjustment range of the concrete block placed on it is set to within the movable range of the second flat plate 37, it becomes easier to check whether the concrete block is properly installed by observing the movement of the second flat plate 37, thus increasing its usefulness. In other words, if the second flat plate 37 has not yet finished moving even after contacting one or two of the corner pieces 43a to 43d, it means that the concrete block is not installed in the correct position, thus serving as an indicator of whether the installation is good or bad.

[0043] Figure 9 is a plan view showing the schematic structure of a concrete block installation device according to another embodiment of this invention.

[0044] Referring to the figure, in this mounting device, corner pieces 43a to 43d, which are columnar in shape with a square cross-section, are attached to the four corners of the first flat plate 35, and notches 45a to 45d are formed at the four corners of the second flat plate 37 so that they correspond to the corner pieces 43a to 43d and are separated by a predetermined distance. As a result, similar to the mounting device according to the third embodiment described above, the second flat plate 37 is restricted to moving only within a predetermined range in the horizontal direction relative to the first flat plate 35.

[0045] Figure 10 is a plan view showing the schematic structure of a concrete block installation device according to another embodiment of this invention, and Figure 11 is a cross-sectional view of the line XI-XI in Figure 10.

[0046] Referring to these figures, the installation device according to this embodiment consists of a first flat plate 35 made of a rectangular flat iron plate, columnar protruding pieces 48a and 48b with a circular cross-section attached to the middle of the first flat plate 35 at predetermined intervals, an adhesive 36 such as water glue formed on the upper surface of the first flat plate 35, fine steel balls 23 for example, sandblasting, arranged so as to be scattered over almost the entire area of ​​the adhesive 36, and a second flat plate 37 made of a rectangular flat iron plate, which is positioned to cover the fine steel balls 23 and has circular openings 47a and 47b formed at positions corresponding to the protruding pieces 48a and 48b and larger in cross-sectional diameter.

[0047] The height of the protruding pieces 48a and 48b from the first flat plate 35 is set to be smaller than the distance between the upper surface of the second flat plate 37, which is placed on the micro-steel balls 23, and the upper surface of the first flat plate 35. Therefore, the second flat plate 37 is configured to be able to move horizontally within a predetermined range relative to the first flat plate 35 while a concrete block is placed on it. In this way, it is possible to easily move the concrete block to be installed horizontally while limiting its range of movement to a predetermined amount.

[0048] Furthermore, while the above embodiment targets concrete blocks of a general shape, it goes without saying that the same method can be applied to concrete blocks of special shapes as shown in the conventional example.

[0049] Furthermore, although the above embodiment uses hard balls made of fine steel balls, the invention is not limited to these, and hard balls made of hard materials such as ceramics or plastics may be used in the same manner.

[0050] Furthermore, in the above embodiment, water-based glue is used as the adhesive for holding the micro-steel balls, but other materials such as corn syrup or other adhesive fluids may be used as long as they can hold the micro-steel balls.

[0051] Furthermore, in the above embodiment, a sphere for sandblasting is used as one example of a steel ball, but it goes without saying that other types of steel balls or granular spheres may also be used.

[0052] Furthermore, although the above embodiment applies the precast concrete block to a box culvert, it goes without saying that it can be similarly applied to arch culverts, as well as water tanks, garages, L-shaped retaining walls, waterways, drainage ditches, retaining wall blocks, and the like.

[0053] Furthermore, although the above embodiment uses an iron plate as the flat plate, other metal plates, reinforced plastic plates, reinforced cement concrete materials, rubber plates, etc. may be used instead.

[0054] Furthermore, in the above embodiment, the micro-steel balls are sandwiched between two flat plates. However, depending on the condition of the bottom surface of the concrete block to be installed and its light weight, it is also possible to place the concrete block directly on top of the micro-steel balls without using the upper flat plate. In this case, the diameter of the micro-steel balls is preferably about 12 mm. If a plate equivalent to the upper flat plate is embedded in the bottom surface of the concrete block, the same effect as in the above embodiment can be achieved. In this case, if L-shaped steel is embedded so as to surround the outer corners of the bottom surface of the concrete block, it will provide protection for the concrete block from the vertical members of the guide rail and enable more stable movement.

[0055] Furthermore, in the first embodiment described above, L-shaped steel is used as the guide rail, but instead, a simple flat plate formed to extend in the direction of movement may be used.

[0056] Furthermore, in the second embodiment described above, a height adjustment fitting is used as a modification. However, if this fitting is attached to the lower surface of the horizontal member of the L-shaped guide rail shown in the first embodiment to adjust the height, and a fine steel ball and a flat plate are attached to the upper surface of the horizontal member to adjust the horizontal direction, the usability will be further improved. [Explanation of symbols]

[0057] 16… Box culvert 19… Foundation concrete 22...Flat plate 23...Minute steel ball 26, 36… Adhesive 27…Horizontal member 35...first plate 37…Second flat plate 39… Precast concrete blocks In each figure, the same reference numeral indicates the same or corresponding part.

Claims

1. An installation device used for installing concrete blocks, A first flat plate in the shape of a flat plate, The adhesive formed on the first flat plate, A hard ball consisting of a plurality of fine spheres or granular steel balls held in place by being scattered on the formed adhesive, An installation device comprising a second flat plate, which is placed on the held hard ball and positioned opposite the first flat plate.

2. The installation device according to claim 2, wherein the adhesive is water-based glue, and each of the first and second flat plates is made of iron plate.

3. The installation device according to claim 3, further comprising a limiting means for restricting the horizontal movement of the second flat plate relative to the first flat plate to a predetermined range.

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