Shoring

Abstract

To provide a shoring capable of improving on-site workability by reducing the number of supports that make up a scaffolding structure while increasing the working space between adjacent columns.SOLUTION: The shoring includes: a scaffolding structure 7 installed on a floor 6; multiple beams that are connected parallel to each other to the top ends of multiple support columns 7a that make up a scaffolding structure; multiple grid members 9 that are arranged in a grid pattern on top of the multiple beams; beam-grid member connections 30, 40, 41 that connect the tops of intersecting beams and the bottoms of the grid members; and multiple joists 10 are connected in a grid pattern to the top of multiple grid members and support the building components. The beams and grid members are H-shaped aluminum members.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a support structure that is installed on the floor surface of a lower floor to support building components on an upper floor. [Background technology]

[0002] Shoring is a device installed on the floor surface of the lower floor to support building components such as floor slabs, beams, and roofs of the upper floors. This shoring includes a scaffolding structure installed on the floor surface of the lower floor, multiple joists connected to the upper part of the scaffolding structure in parallel with each other, and multiple joists arranged in a grid pattern on the multiple joists and connected to the joists, and supports the building components placed on top of the multiple joists from below. The scaffolding structure comprises a plurality of posts arranged at a predetermined pitch and extending vertically, horizontal connecting members extending horizontally between adjacent posts and connecting them, and diagonal connecting members extending diagonally between adjacent posts and connecting them, and the joists are connected to the upper ends of each post.

[0003] Conventional joists are square or round pipes made of iron, which are heavy and have low strength (for example, Patent Document 1).

[0004] In addition, to distribute and support the load of the floor slab, multiple steel square pipes are sometimes placed in a grid pattern between the joists and floor joists. These joists and pipes are connected by bundling them with wire. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-152663 Summary of the Invention [Problem to be solved by the invention]

[0006] When using low-strength beams, it is necessary to narrow the pitch between adjacent posts in the scaffolding structure to support the beams from below. Narrowing the pitch between adjacent posts increases the number of posts and reduces the working space between posts when assembling the scaffolding structure, making it difficult to work on site.

[0007] Therefore, the present invention aims to provide a support system that reduces the number of pillars that make up the scaffolding structure and increases the working space between adjacent pillars, thereby improving on-site workability. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the shoring of the present invention is a shoring that supports building components from below and comprises a scaffolding structure installed on the floor surface, a plurality of joists connected parallel to each other to the upper ends of a plurality of pillars that make up the scaffolding structure, a plurality of middle joists arranged in a crisscross pattern on top of the plurality of joists, joist-to-middle joist connectors that connect the tops of the intersecting joists and the bottoms of the middle joists, and a plurality of joists connected in a crisscross pattern to the tops of the plurality of middle joists and support the building components, the joists and middle joists being H-shaped aluminum components. [Effects of the Invention]

[0009] According to the support of the present invention, the number of pillars constituting the scaffolding structure can be reduced and the working space between adjacent pillars can be increased, thereby improving on-site workability. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic side view showing a state in which a construction floor of a building is being constructed using shoring. [Figure 2] FIG. 2 is a diagram showing a joist used in the support according to the present invention. [Figure 3] FIG. 10 is a diagram showing a core material used in the support according to the present invention. [Figure 4]FIG. 10 is a diagram showing the connecting hardware that constitutes the connecting portion between the joists and the middle joists used in the support of the present invention. [Figure 5] 1 is a diagram showing a beam-to-pillar connection portion of a first embodiment that connects beams and piles according to the present invention.

[0022] FIG. [Figure 6] FIG. 10 is a diagram showing the configuration of a T-bolt that constitutes the connecting portion between the main beam and the middle beam according to the present invention. [Figure 7] 1 is a cross-sectional view showing a beam-to-pillar connection portion of a first embodiment that connects beams and piles according to the present invention. FIG. [Figure 8] FIG. 10 is a view showing a second embodiment of a beam-to-pillar connection portion that connects beams and piles according to the present invention. [Figure 9] This is a first example showing the positioning of the joints between the joists and the middle joists at the intersection of the joists and the middle joists. [Figure 10] This is a second example showing the positioning of the joist-to-pillar connection at the intersection of the joists and the joists. DETAILED DESCRIPTION OF THE INVENTION

[0011] Next, an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each layer, etc., may differ from the actual ones. Therefore, specific thicknesses and dimensions should be determined with reference to the following description. Furthermore, it goes without saying that the drawings may include parts with different dimensional relationships and ratios.

[0012] Furthermore, the embodiments shown below are merely examples of devices and methods for embodying the technical concept of the present invention, and the technical concept of the present invention does not limit the materials, shapes, structures, arrangements, etc. of the components to those described below. The technical concept of the present invention can be modified in various ways within the technical scope defined by the claims.

[0013] In the following description, terms indicating directions such as "upper," "lower," "left," "right," and "depth direction" are used with reference to the directions in the accompanying drawings.

[0014] FIG. 1 is a schematic side view showing the state in which a construction floor of a building 2 is being constructed using shoring 1. Above the construction floor, a floor slab 4 of the upper floor is formed between concrete columns 3, 3. The shoring 1 is a device that supports a formwork (dam board) 5 for pouring concrete when forming the floor slab 4, until the columns 3, 3 and the floor slab 4 are joined. The building component described in this invention corresponds to the floor slab 4.

[0015] As shown in Figure 1, the support structure 1 comprises a scaffolding structure 7 placed on the floor surface 6 of the lower floor, a plurality of joists 8 connected parallel to each other to the top of the scaffolding structure 7, a plurality of intermediate joists 9 connected in a crisscross pattern to the top of the joists 8, and a plurality of joists 10 connected in a crisscross pattern to the top of the intermediate joists 9, with sheathing boards 5 placed on top of the plurality of joists 10 and supported by the support structure 1.

[0016] The scaffolding structure 7 comprises a plurality of pillars 7a arranged on the floor surface 6 at a predetermined pitch in the left-right and depth directions and extending vertically, horizontal connecting members 7b extending horizontally between and connecting adjacent pillars 7a, and diagonal connecting members 7c extending diagonally between and connecting each pillar, and the joists are connected to the upper ends of each pillar.

[0017] The beams 8 extending in the left-right direction are composed of two beams 8a, 8b connected in a straight line, and are connected to the upper ends of each support 7a, with the multiple beams 8 arranged parallel to each other in the depth direction.

[0018] The intermediate beam 9 extending in the depth direction is also made up of two intermediate beams connected in a straight line, and is connected to the upper end of the main beam 8, with the multiple intermediate beams 9 arranged so that they are parallel to each other in the left-right direction.

[0019] The joists 10 extending in the left-right direction are iron pipes, and are made up of two joists 10a, 10b connected in a straight line. They are connected to the upper ends of the center joists 9, and the joists 10 are arranged parallel to each other in the depth direction. A sheathing board 5 is placed on top of the joists 10.

[0020] FIG. 2 shows the shape of the joists 8 (8a, 8b). The joists 8 are H-shaped members made of aluminum (aluminum casting) and include a flat web 11 extending vertically, a lower flange 12 formed at the lower end of the web 11 in an inverted T-shape, and an upper flange 13 formed at the upper end of the web 11 in a T-shape. The lower flange 12 and the upper flange 13 are identical in vertical and width dimensions and shape. Specifically, a groove 14 is formed on the lower surface of the lower flange 12, and a pair of flanges 15 protruding in opposing directions are formed around the opening periphery of the groove 14. A groove 16 is also formed on the upper surface of the upper flange 13, and a pair of flanges 17 protruding in opposing directions are formed around the opening periphery of the groove 16. A pair of ridges 12a, 13a that protrude toward the web 11 and continue in the longitudinal direction are formed on both widthwise ends of the bottom flange 12 of the joist 8 and on both widthwise ends of the top flange 13. The top flange 13 corresponds to the top flange of the joist described in this invention.

[0021] FIG. 3 shows the shape of the intermediate beam 9. Like the main beam 8, the intermediate beam 9 is an H-shaped member made of aluminum (aluminum casting). The intermediate beam 9 includes a flat web 18 extending in the vertical direction, a lower flange 19 formed in an inverted T shape at the lower end of the web 18, and an upper flange 20 formed in a T shape at the upper end of the web 18. The lower flange 19 and the upper flange 20 are identical in vertical and width dimensions and shape. Specifically, a groove 21 is formed on the lower surface of the lower flange 19, and a pair of flanges 22 protruding in opposing directions are formed around the opening periphery of the groove 21. A groove 24 is also formed on the upper surface of the upper flange 20, and a pair of flanges 25 protruding in opposing directions are formed around the opening periphery of the groove 24. A pair of longitudinally continuous ridges 19a, 20a are formed on both widthwise ends of the lower flange 19 of the intermediate draw member 9 and on both widthwise ends of the upper flange 20 thereof, protruding toward the web 18. The lower flange of the intermediate draw member described in this invention corresponds to the upper flange 19.

[0022] As shown in Figures 2 and 3, the joists 8 and the middle joists 9 are members of similar shapes, although they have different vertical and width dimensions.

[0023] FIG. 4 shows the shape of a connecting fitting 30 according to a first embodiment, which connects a joist 8 and a middle joist 9. The connecting fitting 30 of the first embodiment is a member formed by bending a flat steel plate and includes a connecting portion 32 with an elongated hole 31, a joist contact portion 33, and a ridge engagement portion 34. The connecting portion 32 is rectangular, with the elongated hole 31 formed along its length. The joist contact portion 33 is a portion formed parallel to the underside of the connecting portion 32, with a downward step 35 extending from one end of the connecting portion 32. The ridge engagement portion 34 is a plate-like portion formed by bending the tip of an upwardly inclined portion 36, which is formed with an upward slope from the other longitudinal end of the connecting portion 32, into a mountain shape. The connecting fitting of the present invention corresponds to the connecting fitting 30, and the hole formed in the connecting fitting described in the present invention corresponds to the elongated hole 31.

[0024] As shown in Fig. 5, the upper flange 13 of the large drawing material 8 and the lower flange 19 of the middle drawing material 9 are connected by using a connecting fitting 30, a T-bolt 40 and a nut 41. Note that the connecting member between the large drawing material and the middle drawing material described in the present invention corresponds to the connecting fitting 30, the T-bolt 40 and the nut 41.

[0025] As shown in Fig. 6, the T-bolt 40 includes a threaded portion 42 and a flange engaging portion 43 integrally formed in a T-shape at one end of the threaded portion 42. The longitudinal dimension T1 of the flange engaging portion 43 is set to be larger than the opening width K1 between the pair of flange portions 17 of the upper flange 13 and smaller than the groove width K2 of the upper flange 13 (K1 < T1 < K2). Also, the short dimension T2 of the flange engaging portion 43 is set to be smaller than the opening width K1 between the pair of flange portions 17 (T2 < K1).

[0026] Insert the flange engaging portion 43 of the T-bolt 40 into the groove 16 of the upper flange 13 in the state shown by the broken line in Fig. 6 so as not to engage with the pair of flange portions 17, and rotate the threaded portion 42 of the T-bolt 40 by approximately 90°, whereby the tip of the flange engaging portion 43 is inserted inside the pair of flange portions 17.

[0027] With the threaded portion 42 of the T-bolt 40 inserted through the long hole 31 of the connecting fitting 30, place the rib engaging portion 34 of the connecting fitting 30 on the rib 23 of the lower flange 19 of the middle drawing material 9. Also, place the large drawing material abutting portion 33 of the connecting fitting 30 on the upper surface of the upper flange 13 of the large drawing material 8.

[0028] Then, when the nut 41 is screwed onto the threaded portion 42 of the T-bolt 40 and tightened, as shown in Fig. 7, the connecting fitting 30 has the large drawing material abutting portion 33 in surface contact with the upper surface of the upper flange of the large drawing material 8, and while the connecting portion 32, the downward step 35, and the upward inclined portion 36 are elastically deformed, the rib engaging portion 34 applies a downward force F to the rib 23 of the lower flange 19 in a surface contact state. Thereby, the large drawing material 8 and the middle drawing material 9 are connected. Note that the elastic deformation portion described in the present invention corresponds to the connecting portion 32, the downward step 35, and the upward inclined portion 36 of the connecting fitting 30.

[0029] Next, the effects of the support 1 configured as above will be described below.

[0030] In the support structure 1 of this embodiment, the middle beams 9 are connected in a crisscross pattern between the joists 8 and the floor joists 10, so that the load of the floor slab 4 formed on top of the floor joists 10 can be distributed and reliably supported.

[0031] Furthermore, since the main beams 8 and the intermediate beams 9 are lightweight aluminum components, the work of assembling, dismantling and transporting the support structure 1 can be labor-saving.

[0032] In addition, the lower flange 12 and upper flange 13 of the main beam 8 have the same shape, and the lower flange 19 and upper flange 20 of the intermediate beam 9 also have the same shape, making it possible to assemble the main beam 8 and the intermediate beam 9 without considering their orientation in the vertical direction.

[0033] Furthermore, the H-shaped beams 8 have higher bending strength than the square or round pipe beams that were previously used, making it possible to increase the pitch between adjacent posts 7a, 7a. This allows for a wider working space for adjacent posts 7a while reducing the number of posts 7a, improving workability on site.

[0034] In addition, when the threaded portion 42 of the T-bolt 40 engaged with the main beam 8 is inserted into the long hole 31 of the connecting fitting 30 and a nut 41 is screwed onto the threaded portion 42 and tightened, the convex strip engaging portion 34 of the connecting fitting 30 holds the convex strip 23 of the lower flange 19 of the intermediate beam 9, making it easy to connect the main beam 8 and the intermediate beam 9.

[0035] Furthermore, the main beam abutment portion 33 of the connecting fitting 30 is in surface contact with the upper surface of the upper flange 13 of the main beam 8, and while the connecting portion 32, downward step 35, and upward inclined portion 36 of the connecting fitting 30 are elastically deformed, the convex strip engaging portion 34 applies a downward force F in surface contact with the convex strip 23 of the lower flange 19, thereby preventing rotation of the connecting fitting 30 and enabling the main beam 8 and the intermediate beam 9 to be securely connected without any rattle in the convex strip engaging portion 34.

[0036] 8 shows a second embodiment of a connecting fitting 45, T-bolt 40, and nut 41 that connects a beam 8 and a middle beam 9. The connecting fitting 45, T-bolt 40, and nut 41 correspond to the beam-to-middle beam connecting member described in the present invention.

[0037] The connecting fitting 45 of the second embodiment has the same components as the connecting fitting 30 of the first embodiment, and a pair of intermediate puller support rods 46 extend in parallel from the widthwise sides of the connecting portion 32 toward above the ridge engagement portion 34. The connecting fitting 45 prevents the intermediate puller 9 from tilting toward the connecting fitting 45 by having the tips 46a of the pair of intermediate puller support rods 46 abut against the web 18 of the intermediate puller 9.

[0038] Therefore, by using a connecting fitting 45 having a pair of intermediate pull rod support rods 46, the intermediate pull rod 9 can be connected to the main pull rod 8 in a state where it is prevented from tilting, thereby increasing safety.

[0039] 9 and 10 show the position of connecting fitting A, which connects the main beam 8 and the center beam 9, with a dotted circle. Note that connecting fitting A is connecting fitting 30 of the first embodiment or connecting fitting 45 of the second embodiment. Also, it is assumed that T-bolts 40 and nuts 41 are attached to connecting fittings 30 and 45.

[0040] In Figure 9, a pair of connecting fittings A are arranged at the intersection of the main beam 8 and the intermediate beam 9, facing each other from the left and right (width direction) across the web 18 of the lower flange 19. By arranging the connecting fittings A in this way, the main beam 8 and the intermediate beam 9 can be firmly connected.

[0041] 10 shows that at the intersection of the main beam 8 and the intermediate beam 9, a connecting fitting A is arranged on one side of the left-right direction (width direction) of the bottom flange 19 on the near side in the depth direction where the intermediate beam 9 extends, and a connecting fitting A is arranged on the other side of the left-right direction (width direction) of the bottom flange 19 on the far side in the depth direction where the intermediate beam 9 extends. In this way, by arranging one connecting fitting A on one side of the left-right direction (width direction) of the bottom flange 19 of the intermediate beam 9, the main beam 8 and the intermediate beam 9 can be reliably connected while reducing the number of connecting fitting A parts.

[0042] Furthermore, in the arrangement of the connecting fittings A in Figure 10, even if they are arranged in a staggered pattern on one side and the other in the left-right direction (width direction) of the lower flange 19 in the depth direction in which the intermediate pull member 9 extends, the number of parts of the connecting fittings A can be reduced while still firmly connecting the main pull member 8 and the intermediate pull member 9. Furthermore, Figures 1 to 10 describe the support structure 1 for supporting the floor slab 4 of the upper floor above the construction floor, but the same effect can be achieved not only with the floor slab 4 but also with support structures supporting building components such as beams and roofs. Furthermore, in the above embodiment, the main beams 8 and the intermediate beams 9 are similarly shaped components (see Figures 2 and 3), but even if the main beams 8 and the intermediate beams 9 are H-shaped aluminum components of the same shape, the same effects as those described above can be obtained. [Explanation of symbols]

[0043] 1 Shoring 2. Building 3 Pillars 4 Floor slab 5 Formwork (shielding) 6 Floor 7 Scaffolding structure 7a Post 7b Horizontal connection material 7c Diagonal connector 8. Joists 8a,8b Ohiki material 9 Nakabiki material 10 Joist material 10a,10b Joist material 11 Web 12 Lower flange 12a Convex strip 13 Upper flange 13a Convex strip 14 Groove 15 Tsuba 16 Groove 17 Tsuba 18 Web 19 Lower flange 20 Upper flange 21 Groove 22 Tsuba 23 Convex strip 24 Groove 25 Tsuba 30 Connecting fittings 31 slotted hole 32 Connecting part 33 Joist abutment 34 Convex engagement portion 35 Downhill Step 36 Uphill section 40 T-bolts 41 Nut 42 Threaded section 43 flange engagement part

Claims

1. In shoring that supports building components from below, A scaffolding structure installed on the floor surface; A plurality of beams connected parallel to each other to the upper ends of the plurality of supports constituting the scaffolding structure; A plurality of middle beams arranged in a grid pattern on top of the plurality of beams; a beam-to-span connecting portion that connects the upper portion of the beam and the lower portion of the span that intersect with each other; and a plurality of joists connected in a grid pattern to the upper portions of the plurality of intermediate members to support the building components. A support structure characterized in that the main beams and the intermediate beams are H-shaped aluminum components.

2. The joists have upper flanges formed on the upper parts of the joists webs, The intermediate puller has an intermediate puller lower flange formed at the lower part of the intermediate puller web, The support structure described in claim 1, characterized in that the main beam / intermediate beam connection portion comprises connecting fittings that engage with the main beam upper flange and the intermediate beam lower flange, and T-bolts and nuts that connect the connecting fittings to the main beam upper flange and the intermediate beam lower flange.

3. A groove is formed on the upper surface of the upper flange of the joist, and a pair of flanges facing each other are formed on the opening periphery of the groove, The T-bolt has a flange engaging portion formed at one end of a threaded portion, and the flange engaging portion is inserted into the grooves to engage with the pair of flange portions, The support structure described in claim 2, characterized in that the threaded portion protruding upward from the groove is inserted into a hole formed in the connecting fitting, and the nut is screwed onto the threaded portion protruding upward from the connecting fitting, causing the connecting fitting to press against the upper flange of the main beam and the lower flange of the intermediate beam, thereby connecting the main beam and the intermediate beam.

4. A support structure as described in claim 3, characterized in that a pair of protrusions protruding toward the web side of the intermediate pull material are formed on both widthwise ends of the lower flange of the intermediate pull material, and the connecting fitting is formed with a protrusion engagement portion that abuts in face-to-face contact with one of the pair of protrusions.

5. The support structure described in claim 4, characterized in that the connecting fitting is provided with an elastic deformation portion that elastically deforms when the nut is screwed into the threaded portion, causing the convex engagement portion to abut against the convex.

6. A support structure as described in claim 5, characterized in that a middle-pillar support rod is provided on the connecting fitting to prevent the middle pile from tilting toward the connecting fitting when the main pile and the middle pile are connected by the connecting fitting, the T-bolt and the nut.

7. A support structure as described in any one of claims 2 to 6, characterized in that a pair of the main beam / intermediate beam connection portions are arranged so as to face each other across the intermediate beam web.

8. A support structure as described in any one of claims 2 to 6, characterized in that the main beam / intermediate beam connection portions are arranged in a staggered pattern on one side and the other side of the width direction of the intermediate beam web in the direction in which the intermediate beam extends.

Images