Support

Abstract

To provide a support having a lighter weight.SOLUTION: A support 1000 includes a left support column 30A, a right support column 30B, and a horizontal reinforcement placement face 80, the left support column 30A and the right support column 30B being isolated from each other in the horizontal direction, the left support column 30A and the right support column 30B each including one vertical material extending in the vertical direction, and a formwork placement part 34 provided on the upper part of the vertical material, where a formwork 2000 is placed.SELECTED DRAWING: Figure 1B

Description

[Technical field]

[0001] The present invention relates to a support for supporting formwork and reinforcing bars. [Background technology]

[0002] When constructing a concrete foundation using the single-cast method (also called the "one-piece cast method"), supports may be used to support the formwork and reinforcing bars in order to raise them above the ground surface.

[0003] Patent Document 1 discloses a reinforcement support device that supports horizontal and vertical reinforcements buried in a foundation, with the left-right direction as the long side and the front-to-back direction as the short side, and comprises a main body having an upper surface facing upward, legs protruding in the front-to-back direction from the lower end of the main body, a reinforcing part extending upward from one of the left and right sides of the upper surface, and a holder extending in the left-right direction from the reinforcing part and located above the upper surface, having a circular ring shape with the up-down direction as the axial direction and having an opening facing horizontally, and the upper surface has a mounting surface that curves downward along the left-right direction from below the holder on the other left-right side. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-010744 Summary of the Invention [Problem to be solved by the invention]

[0005] It is desirable to reduce the weight of supports so that workers can easily carry them at concrete foundation construction sites.

[0006] An object of the present invention is to provide a lightweight support. [Means for solving the problem]

[0007] The present invention provides the following aspects. (Section 1) A support for supporting a pair of formwork used in forming a concrete foundation and reinforcing bars including horizontal and vertical bars embedded in the concrete foundation, A pair of supports separated from each other in the left-right direction, each support including a vertical member extending in the up-down direction and a form placement portion provided on an upper portion of the vertical member on which the form is placed; A horizontal bar placement surface is provided between the pair of columns and on which the horizontal bar is placed; A support device comprising:

[0008] (Section 2) The vertical member includes a strut body, The support body includes a first portion having a left-right length smaller than a left-right length of a bottom surface of the formwork, The formwork mounting portion has a left-right length greater than the left-right length of the bottom surface of the formwork, Item 1. A support device as described in item 1.

[0009] (Section 3) The left-right center of the first portion substantially coincides with the left-right center of the formwork mounting portion. Item 2. The support device according to item 2.

[0010] (Section 4) The vertical members further include ribs; The rib extends in the vertical direction and is perpendicular to the support body. Item 2 or 3. The support according to item 2 or 3.

[0011] (Section 5) The vertical members do not have through holes. Item 5. The support device according to any one of items 1 to 4. Effect of the Invention

[0012] The reinforcing bar support described in Patent Document 1 has two vertical members and a horizontal member that spans the tops of the two vertical members, and a formwork is placed on the horizontal member. Therefore, in the reinforcing bar support described in Patent Document 1, the load of the formwork is supported by the horizontal member and the two vertical members. In contrast, in the support of the present invention, the formwork can be supported by the formwork mounting part and one vertical member. This allows the support to be made lighter. [Brief description of the drawings]

[0013] [Figure 1A] FIG. 2 is a perspective view of a support supporting the formwork and reinforcing bars. [Figure 1B] FIG. 13 is a front view of the support supporting the formwork and reinforcing bars. [Figure 2A] FIG. 2 is a perspective view of the support tool as viewed from the front side. [Figure 2B] FIG. 2B is a perspective view of the support seen from the front side, and is a perspective view of the support seen from an angle different from that of FIG. 2A. [Figure 3A] FIG. 4 is a perspective view of the support tool as viewed from the rear side. [Figure 3B] FIG. 3B is a perspective view of the support tool as seen from the rear side, and is a perspective view of the support tool as seen from an angle different from that of FIG. 3A. [Figure 4] FIG. [Figure 5A] FIG. 2 is a perspective view of a plurality of supports stacked in the front-rear direction. [Figure 5B] FIG. 2 is a plan view of only the first base portions and legs of a plurality of supports stacked in the front-rear direction. [Figure 6] FIG. 6 is an end view taken along line VI-VI of FIG. 1B. [Figure 7] FIG. 13 is a front view of the support and reinforcing bar to show how to attach the vertical bar to the vertical bar holder. [Figure 8] FIG. 13 is a front view of a support according to a modified example. [Figure 9] FIG. 13 is a front view of a support according to a modified example. [Figure 10] FIG. 13 is a front view of a support according to a modified example. [Figure 11A] FIG. 13 is a perspective view of a support and a spacing retainer according to a modified example. [Figure 11B] FIG. 13 is a perspective view of a support according to a modified example to which a spacing retainer is attached. [Figure 12] FIG. 13 is a front view of a support according to a modified example. [Figure 13] FIG. 13 is a front view of a support according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The support device 1000 of the present invention will be described with reference to the drawings.

[0015] As shown in FIG. 1A and FIG. 1B, when a concrete foundation is manufactured by a one-time pouring method, the support 1000 supports a pair of formwork 2000 for forming a rising portion of the concrete foundation and a reinforcing bar 3000 to be embedded in the concrete foundation in a state where the formwork 2000 is raised above the ground surface. The concrete foundation may be a strip foundation or a mat foundation. The reinforcing bar 3000 includes a horizontal bar 3100 and a vertical bar 3200. The horizontal bar 3100 and the vertical bar 3200 are connected to each other by, for example, welding. At an actual concrete foundation construction site, a plurality of supports 1000 are arranged at intervals, and the formwork 2000 and the horizontal bar 3100 are arranged so as to straddle the plurality of supports 1000.

[0016] The support 1000 is preferably made of resin or fiber-reinforced resin such as carbon fiber-reinforced resin. The support 1000 is preferably a one-piece molded product, more preferably a one-piece molded product made of resin or fiber-reinforced resin such as carbon fiber-reinforced resin.

[0017] For ease of explanation, the left-right direction, front-back direction, and up-down direction shown in Fig. 1A will be respectively explained as the left-right direction, front-back direction, and up-down direction of the support 1000. The left-right direction is parallel to the direction in which a pair of formworks 2000 placed on the support 1000 face each other. The front-back direction is parallel to the length direction of the formwork 2000. The up-down direction is parallel to the vertical direction and the height direction of the formwork 2000.

[0018] <1. Structure of the support> As shown in Figures 1B to 4, the support device 1000 mainly comprises a first base 10, a plurality of legs 20, two pillars (left pillar 30A and right pillar 30B), a second base 40, a plurality of reinforcing portions 50, a plurality of reinforcing portions 60, a vertical bar retaining portion 70, a horizontal bar mounting surface 80, and a horizontal bar movement restricting portion 90.

[0019] <1-1.First base> 2A, the first base portion 10 is provided at the bottommost portion of the support 1000. The first base portion 10 is in the form of a plate that extends horizontally in the left-right direction.

[0020] <1-2. Legs> The legs 20 include a plurality of front legs and a plurality of rear legs. As shown in Figs. 2A and 4, the front legs include a central front leg 21, a left front leg 22, and a right front leg 23. The front legs extend forward from the first base 10. As shown in Figs. 3A and 4, the rear legs include a central rear leg 24, a left rear leg 25, and a right rear leg 26. The rear legs extend backward from the first base 10. The number of front legs and rear legs is not limited to three.

[0021] The central front leg 21 is provided at the center in the left-right direction of the first base 10. The left front leg 22 is provided at the position of the left support pillar 30A. The left front leg 22 has an opening 221. The opening 221 has a shape complementary to the left rear leg 25 described below. The right front leg 23 is provided at the position of the right support pillar 30B.

[0022] The central hind leg 24 is provided at the left-right center of the first base 10. The left hind leg 25 is provided at the position of the left support pillar 30A. The right hind leg 26 is provided at the position of the right support pillar 30B. The right hind leg 26 has an opening 261. The opening 261 has a shape complementary to the right front leg 23.

[0023] The central front leg 21 and the central rear leg 24 have a mark 27. The mark 27 is, for example, a notch. The mark 27 indicates the center of the support 1000 (first base 10) in the left-right direction. By the support 1000 having the mark 27, it becomes easy to align the support 1000 with the center line when placing the support 1000 on the ground.

[0024] 5A and 5B, when multiple supports 1000 are stacked in the front-to-rear direction, the left rear leg 25 of one support 1000 is placed in the opening 221 of the left front leg 22 of another support 1000 arranged behind the support 1000. Also, the right front leg 23 of another support 1000 arranged behind the support 1000 is placed in the opening 261 of the right rear leg 26 of the support 1000.

[0025] <1-3. Support> As shown in Figs. 1B to 3B, the two columns are a left column 30A and a right column 30B. The left column 30A and the right column 30B are spaced apart from each other in the left-right direction. The left column 30A and the right column 30B each include one vertical member. In this embodiment, each vertical member is composed of a column body 31 and ribs (front rib 32 and rear rib 33). A formwork placement portion 34 is provided on the upper portion of each vertical member.

[0026] The pillar body 31 is perpendicular to the first base portion 10 and extends upward from the first base portion 10. As shown in Fig. 6, the pillar body 31 is in the shape of a plate whose thickness in the front-rear direction is smaller than its length in the left-right direction. The pillar body 31 does not have a through hole.

[0027] The pillar body 31 includes a first portion 311 , a second portion 312 provided on an upper portion of the first portion 311 , and a third portion 313 provided on a lower portion of the first portion 311 .

[0028] The first portion 311 is linear and has a substantially uniform left-right length over its entire vertical length. The left-right center of the first portion 311 substantially coincides with the left-right center of the formwork mounting portion 34. The left-right length of the first portion 311 is smaller than the left-right length of the bottom surface of the formwork 2000 and the left-right length of the formwork mounting portion 34.

[0029] The second portion 312 is inclined so as to widen outward in the left-right direction as it goes upward. In other words, the left-right length of the second portion 312 gradually increases as it goes upward. The second portion 312 is integrated with the lower surface of the formwork mounting portion 34. By providing the second portion 312, the strength of the left support 30A and the right support 30B can be improved.

[0030] The third portion 313 is inclined so as to widen outward in the left-right direction as it goes downward. That is, the left-right length of the third portion 313 gradually increases as it goes downward. The third portion 313 is integrated with the upper surface of the first base 10. By providing the third portion 313, the strength of the left support 30A and the right support 30B can be improved.

[0031] The ribs include two front ribs 32 and two rear ribs 33. Providing the ribs can improve the strength of the left support column 30A and the right support column 30B. The number of the front ribs 32 and the rear ribs 33 is not limited to two.

[0032] As shown in Figures 2A and 6, the front rib 32 is perpendicular to the first base 10, the pillar body 31 and the formwork mounting portion 34, and extends forward from the front surface of the pillar body 31. As shown in Figures 3A and 6, the rear rib 33 is perpendicular to the first base 10, the pillar body 31 and the formwork mounting portion 34, and extends rearward from the rear surface of the pillar body 31. Both the front rib 32 and the rear rib 33 extend over the entire vertical length of the pillar body 31 (i.e., from the upper surface of the first base 10 to the lower surface of the formwork mounting portion 34). Both the front rib 32 and the rear rib 33 are plate-shaped with a left-right thickness smaller than the front-rear length.

[0033] The formwork mounting portion 34 is provided at the upper end of the pillar body 31. The formwork 2000 is placed directly on the upper surface of the formwork mounting portion 34, or on a spacing retainer 4000 (see FIG. 11A) placed on the upper surface of the formwork mounting portion 34. The upper surface of the formwork mounting portion 34 is preferably flat. The left-right length of the formwork mounting portion 34 is greater than the left-right length of the bottom surface of the formwork 2000. In addition, the front-rear length of the formwork mounting portion 34 is greater than the front-rear length of the pillar body 31.

[0034] <1-4.Second base> 1B to 3B, the second base 40 is disposed above the first base 10. The second base 40 is a plate-like member extending horizontally in the left-right direction between the left support column 30A and the right support column 30B (i.e., approximately parallel to the first base 10), and is integrated with each of the left support column 30A and the right support column 30B.

[0035] <1-5. Reinforcement> 1B to 3B, the multiple reinforcing parts 50 extend between the first base part 10 and the second base part 40. The multiple reinforcing parts 50 are plate-shaped.

[0036] The multiple reinforcing parts 50 include multiple inclined reinforcing parts that extend at an incline in the left-right direction (i.e., with respect to the up-down direction) with respect to the first base part 10 and the second base part 40. The multiple reinforcing parts include at least one inclined reinforcing part that inclines downward to the left and at least one inclined reinforcing part that inclines downward to the right. At least some of the inclined reinforcing parts and the first base part 10 or the second base part 40 form a triangle in a front view. In this embodiment, the multiple reinforcing parts 50 include a first inclined reinforcing part 51, a second inclined reinforcing part 52, a third inclined reinforcing part 53, and a fourth inclined reinforcing part 54.

[0037] By providing multiple inclined reinforcing portions 51, 52, 53, and 54, when the formwork 2000 is moved to fine-tune its position while placed on the formwork mounting portion 34, the strength of the support 1000 can be improved against horizontal loads acting mainly in the left-right direction on the support 1000.

[0038] The first inclined reinforcement portion 51 is inclined downward to the left from the second base portion 40. The second inclined reinforcement portion 52 is located to the right of the first inclined reinforcement portion 51 and is inclined downward to the right from the second base portion 40. That is, the second inclined reinforcement portion 52 is inclined downward to the right so as to move away from the first inclined reinforcement portion 51 as it goes downward. The upper end of the first inclined reinforcement portion 51 and the upper end of the second inclined reinforcement portion 52 intersect and are integrated with the second base portion 40. The lower end of the first inclined reinforcement portion 51 and the lower end of the second inclined reinforcement portion 52 are each integrated with the first base portion 10. The first inclined reinforcement portion 51, the second inclined reinforcement portion 52, and the first base portion 10 form a first triangle with the first base portion 10 as the base when viewed from the front. It is preferable that the length of the first inclined reinforcement portion 51 and the length of the second inclined reinforcement portion 52 are the same so that the first triangle is an isosceles triangle or an equilateral triangle. The position of the upper apex of the first triangle in the left-right direction is preferably aligned with the mark 27. In other words, the upper apex of the first triangle is preferably located at the center of the first base 10 in the left-right direction.

[0039] The upper end of the third inclined reinforcement portion 53 is integrated with the second base portion 40. The third inclined reinforcement portion 53 is located to the left of the first inclined reinforcement portion 51 and is inclined downward to the right from the second base portion 40. In other words, the third inclined reinforcement portion 53 is inclined downward to the right so as to approach the first inclined reinforcement portion 51 as it goes downward. The lower end of the third inclined reinforcement portion 53 intersects with the lower end of the first inclined reinforcement portion 51 and is integrated with the first base portion 10. The first inclined reinforcement portion 51, the third inclined reinforcement portion 53 and the second base portion 40 form a second triangle with the second base portion 40 as the base in a front view. It is preferable that the length of the first inclined reinforcement portion 51 and the length of the third inclined reinforcement portion 53 are the same so that the second triangle is an isosceles triangle or an equilateral triangle.

[0040] The upper end of the fourth inclined reinforcement portion 54 is integrated with the second base portion 40. The fourth inclined reinforcement portion 54 is located to the right of the second inclined reinforcement portion 52 and is inclined downward to the left from the second base portion 40. In other words, the fourth inclined reinforcement portion 54 is inclined downward to the left so as to approach the second inclined reinforcement portion 52 as it goes downward. The lower end of the fourth inclined reinforcement portion 54 intersects with the lower end of the second inclined reinforcement portion 52 and is integrated with the first base portion 10. The second inclined reinforcement portion 52, the fourth inclined reinforcement portion 54 and the second base portion 40 form a third triangle with the second base portion 40 as the base in a front view. It is preferable that the length of the second inclined reinforcement portion 52 and the length of the fourth inclined reinforcement portion 54 are the same so that the third triangle is an isosceles triangle or an equilateral triangle. <1-6. Strengthening section>

[0041] The reinforcement parts 60 are provided between each of the inclined reinforcement parts 51, 52, 53, 54 and the first base 10, between each of the inclined reinforcement parts 51, 52, 53, 54 and the second base 40, between the first inclined reinforcement part 51 and the second inclined reinforcement part 52, between the first inclined reinforcement part 51 and the third inclined reinforcement part 53, and between the second inclined reinforcement part 52 and the fourth inclined reinforcement part 54. By providing the reinforcement parts 60, the strength of the support 1000 against horizontal loads can be improved. The reinforcement parts 60 are, for example, triangular plate-shaped when viewed from the front. The reinforcement parts 60 are integrated with each of the inclined reinforcement parts 51, 52, 53, 54, the first base 10, and the second base 40.

[0042] <1-7. Vertical bar holding section> 1B to 4, a first extension portion 100 is provided on the right side of the left support 30A, extending toward the right support 30B. A vertical bar holding portion 70 for holding the vertical bar 3200 is provided on the first extension portion 100. The vertical bar holding portion 70 is provided above the horizontal bar placing surface 80 and to the left of the horizontal bar placing surface 80.

[0043] In this embodiment, the vertical line holding portion 70 includes two front vertical line holding portions 71 and two rear vertical line holding portions 72. Note that the number of the front vertical line holding portions 71 and the rear vertical line holding portions 72 is not limited to two.

[0044] The two front vertical line holding parts 71 are spaced apart from each other in the up-down direction. The two rear vertical line holding parts 72 are disposed rearward of the front vertical line holding parts 71 and are spaced apart from each other in the up-down direction. The two front vertical line holding parts 71 and the two rear vertical line holding parts 72 are disposed alternately in the up-down direction in a front view. That is, one rear vertical line holding part 72 is disposed at a height between the two front vertical line holding parts 71, and the other rear vertical line holding part 72 is disposed lower than the two front vertical line holding parts 71.

[0045] In the front-rear direction, a space exists between the two front vertical-reinforcement holding parts 71 and the two rear vertical-reinforcement holding parts 72. As shown in Fig. 7, the vertical reinforcement 3200 is inserted into the holding space between the two front vertical-reinforcement holding parts 71 and the two rear vertical-reinforcement holding parts 72 from the right side of the two front vertical-reinforcement holding parts 71 and the two rear vertical-reinforcement holding parts 72. In a plan view, the holding space is rectangular.

[0046] Each of the two front vertical bar holding portions 71 and the two rear vertical bar holding portions 72 includes a main body portion 73 extending to the right from the first extension portion 100 and a protrusion portion 74 provided on the right end portion of the main body portion 73.

[0047] It is preferable that the main body 73 is elastically deformable. Since the main body 73 is elastically deformable, when the vertical reinforcement 3200 is inserted into the holding space, the two front vertical reinforcement holding parts 71 are elastically deformed forward and the two rear vertical reinforcement holding parts 72 are elastically deformed backward. This widens the entrance of the holding space, making it easier to insert the vertical reinforcement 3200 into the holding space.

[0048] The protrusions 74 of the two front vertical-reinforcement holding parts 71 protrude rearward from the main body part 73. The protrusions 74 of the two rear vertical-reinforcement holding parts 72 protrude forward from the main body part 73. By providing the protrusions 74, once the vertical reinforcement 3200 is inserted into the holding space, even if the vertical reinforcement 3200 tries to leave the holding space, the protrusions 74 get caught on the vertical reinforcement 3200, so that the vertical reinforcement 3200 cannot easily leave the holding space.

[0049] It is preferable that the horizontal distance in the front-rear direction between the protrusions 74 of the two front vertical-reinforcement holding parts 71 and the protrusions 74 of the two rear vertical-reinforcement holding parts 72 is smaller than the diameter of the vertical reinforcement 3200. This makes it possible that once the vertical reinforcement 3200 is inserted into the holding space, the vertical reinforcement 3200 cannot easily come out of the holding space.

[0050] The protrusion 74 has an introduction portion 741 for facilitating the insertion of the vertical muscle 3200. In this embodiment, the introduction portion 741 is an inclined surface provided on the right side of the protrusion 74 (i.e., the side where the vertical muscle 3200 enters). The inclined surface is inclined toward the holding space in which the vertical muscle 3200 is held. By providing the introduction portion 741, it is possible to prevent the vertical muscle 3200 from getting caught on the protrusion 74 when inserting the vertical muscle 3200 into the holding space, and the vertical muscle 3200 can be smoothly inserted into the holding space.

[0051] <1-8. Horizontal bar placement surface and horizontal bar movement control part> 1B to 3B, a second extension portion 110 extending upward is provided on the upper surface of the second base portion 40. A part of the upper surface of the second extension portion 110 serves as the horizontal-reinforcement mounting surface 80. The horizontal-reinforcement mounting surface 80 is a flat surface. The horizontal-reinforcement mounting surface 80 is preferably located on a virtual line O (see FIG. 1B) that extends in the vertical direction and passes through the upper apex of the first triangle formed by the first inclined reinforcement portion 51, the second inclined reinforcement portion 52, and the first base portion 10.

[0052] The horizontal line movement restricting part 90 is provided on the opposite side of the horizontal line placing surface 80 from the vertical line holding part 70 (i.e., on the right side of the horizontal line placing surface 80). The horizontal line movement restricting part 90 restricts the movement of the horizontal line 3100 to the right. The horizontal line movement restricting part 90 extends upward from the horizontal line placing surface 80.

[0053] 7, when attaching the vertical lines 3200 to the vertical line holder 70, the horizontal lines 3100 are placed on the horizontal line placement surface 80 and tilted so that the vertical lines 3200 are diagonally rightward, and then the vertical lines 3200 are rotated leftward and inserted into the holding space. The horizontal line movement restricting part 90 restricts the horizontal lines 3100 from moving rightward, so that the horizontal lines 3100 do not slip rightward when the vertical lines 3200 are rotated leftward.

[0054] <2.Effects> As shown in FIGS. 1A and 1B, by using a support device 1000 of the present invention, a pair of opposing formwork 2000 and reinforcing bar 3000 can be supported in a state where they are suspended above the ground.

[0055] At a construction site of a concrete foundation, after the formwork 2000 is placed on the formwork placement portion 34, the formwork 2000 may be moved to fine-tune the position of the formwork 2000 in order to make the formwork 2000 fit. When the formwork 2000 is moved, a horizontal load is applied to the support 1000. As shown in FIG. 1B, the support 1000 includes at least one inclined reinforcement portion (first inclined reinforcement portion 51, fourth inclined reinforcement portion 54) inclined in the lower left direction and at least one inclined reinforcement portion (second inclined reinforcement portion 52, third inclined reinforcement portion 53) inclined in the lower right direction, and therefore the strength of the support 1000 can be increased against a horizontal load applied mainly in the left-right direction of the support 1000.

[0056] 1B, the first inclined reinforcement portion 51, the second inclined reinforcement portion 52, and the first base portion 10 form a first triangle in a front view, thereby increasing the strength against a horizontal load in the left-right direction applied to the support 1000. The multiple inclined reinforcement portions 51, 52, 53, and 54, the first base portion 10, and the second base portion 40 form multiple triangles, thereby increasing the strength against a horizontal load in the left-right direction applied to the support 1000.

[0057] 1B, the upper apex of the first triangle is strong because it is the portion where the first inclined reinforcement part 51, the second inclined reinforcement part 52, and the first base part 10 are integrated together. Since the horizontal reinforcement mounting surface 80 is located on the virtual line O, the upper apex of the first triangle, which is strong, can support the load of the horizontal reinforcement 3100 placed on the horizontal reinforcement mounting surface 80.

[0058] As shown in FIG. 1B, reinforcing portions 60 are provided between each inclined reinforcement portion 51, 52, 53, 54 and the first base 10, between each inclined reinforcement portion 51, 52, 53, 54 and the second base 40, between the first inclined reinforcement portion 51 and the second inclined reinforcement portion 52, between the first inclined reinforcement portion 51 and the third inclined reinforcement portion 53, and between the second inclined reinforcement portion 52 and the fourth inclined reinforcement portion 54, thereby further increasing the strength against horizontal loads applied mainly in the left-right direction of the support 1000.

[0059] As shown in FIG. 1B, the support device 1000 includes a vertical bar holding portion 70, which can hold the vertical bars 3200.

[0060] When the support is a resin molded product and each vertical bar holding portion has a C-shape or a U-shape as disclosed in FIG. 1 of Patent Document 1, for example, a slide mold must be used to manufacture the support. The manufacturing method using a slide mold is time-consuming. In contrast, in the present invention, the two front vertical bar holding portions 71 and the two rear vertical bar holding portions 72 are arranged alternately in the up-down direction when viewed from the front. Since it is not necessary to use a slide mold to manufacture the support 1000 having the vertical bar holding portions 70 arranged in this way, the manufacturing effort can be reduced.

[0061] 7, when attaching the vertical lines 3200 to the vertical line holder 70, the vertical lines 3200 are inclined diagonally to the right, and then the vertical lines 3200 are rotated leftward and inserted into the holding space. The horizontal line movement restricting part 90 restricts the horizontal lines 3100 from moving rightward, so that the horizontal lines 3100 do not move rightward when the vertical lines 3200 are rotated leftward. This makes it easy to attach the vertical lines 3200 to the vertical line holder 70.

[0062] As shown in Figures 5A and 5B, when multiple supports 1000 are stacked in the front-to-rear direction, the left rear leg 25 of one support 1000 fits within the opening 221 of the left front leg 22 of the other support 1000. Also, the right front leg 23 of one support 1000 fits within the opening 261 of the right rear leg 26 of the other support 1000. This makes it possible to reduce the distance between the multiple supports 1000 in the front-to-rear direction, thereby reducing the space occupied by the multiple supports 1000. Therefore, when multiple supports 1000 are packed in one box, more supports 1000 can be placed in the box.

[0063] The support 1000 is made of resin or fiber-reinforced resin, thereby making it possible to reduce the weight of the support 1000. Furthermore, the support 1000 is an integrally molded product, thereby making it possible to reduce manufacturing costs.

[0064] The reinforcing bar support described in Patent Document 1 includes two vertical members and a horizontal member that spans the upper portions of the two vertical members, and a formwork is placed on the horizontal member. Therefore, in the reinforcing bar support described in Patent Document 1, the horizontal member and the two vertical members support the load of the formwork. In contrast, in the support 1000 of the present invention, the left support 30A and the right support 30B each include one vertical member and a formwork mounting portion 34 provided on the one vertical member, and the load of the formwork 2000 is supported by the formwork mounting portion 34 and only one vertical member. Therefore, the weight of the support 1000 can be reduced.

[0065] As shown in FIG. 1B, the left-right center of the first portion 311 coincides with the left-right center of the formwork mounting portion 34, so that the load of the formwork 2000 is evenly distributed across the vertical members (left support 30A and right support 30B), thereby enabling the vertical members to firmly support the load of the formwork 2000.

[0066] As shown in FIG. 1B, the left support pillar 30A and the right support pillar 30B are provided with ribs (front rib 32 and rear rib 33), thereby making it possible to improve the strength of the left support pillar 30A and the right support pillar 30B.

[0067] As shown in FIG. 1B, the left support column 30A and the right support column 30B do not have a through-hole, so that the strength of the left support column 30A and the right support column 30B can be improved.

[0068] <3. Modifications> The present invention is not limited to the above embodiment, and various modifications are possible without departing from the scope of the present invention. Modifications of the present invention will be described below. The modifications described below can be applied to the above embodiment alone or in appropriate combination without departing from the scope of the present invention.

[0069] (3-1) The mark 27 is not limited to a notch, and may be, for example, a protrusion protruding forward from the central front leg 21 and a protrusion protruding rearward from the central rear leg 24. Alternatively, the mark 27 may be a protrusion protruding upward from the upper surface of the central front leg 21 and the upper surface of the central rear leg 24.

[0070] (3-2) In the case where the leg portion 20 does not include the central front leg portion 21 and / or the central rear leg portion 24, the mark 27 may be provided on the first base portion 10.

[0071] (3-3) The number of inclined reinforcing portions 51, 52, 53, 54 is appropriately determined in consideration of the strength of the support 1000, and may be less than four or more than four. In other words, the number of triangles formed between the first base portion 10 and the second base portion 40 is appropriately determined in consideration of the strength of the support 1000.

[0072] (3-4) As shown in FIG. 8, the first triangle, the second triangle, and the third triangle may be inverted from the first triangle, the second triangle, and the third triangle shown in FIG. 1B.

[0073] (3-5) At least two of the inclined reinforcing portions 51, 52, 53, 54 may intersect at a point other than their upper ends or lower ends. For example, at least two of the inclined reinforcing portions 51, 52, 53, 54 may intersect at their midpoints to form an X-shape in a front view.

[0074] (3-6) As shown in FIG. 9, the multiple reinforcing parts 50 may include at least one vertical reinforcing part 55 that intersects the first base part 10 and the second base part 40 at approximately right angles (i.e., extends parallel to the up-down direction). By providing the vertical reinforcing part 55, it is possible to further improve the strength against the horizontal load that is mainly applied in the left-right direction of the support 1000. The lower end of the vertical reinforcing part 55 is integrated with the first base part 10, and the upper end of the vertical reinforcing part 55 is integrated with the second base part 40. The vertical reinforcing part 55 is preferably provided inside the first triangle, the second triangle, and / or the third triangle. The vertical reinforcing part 55 provided inside the triangle is preferably integrated with the apex of the triangle.

[0075] (3-7) Although the embodiment in which the plurality of inclined reinforcement parts 51, 52, 53, 54 and the first base part 10 or the second base part 40 form a triangle in a front view is a preferred embodiment of the support 1000, the embodiment of the support 1000 is not limited to the one in which they form a triangle. For example, the upper end of the first inclined reinforcement part 51 and the upper end of the second inclined reinforcement part 52 may not intersect and may be separated in the left-right direction. In this case, the first inclined reinforcement part 51, the second inclined reinforcement part 52, the first base part 10, and the second base part 40 form a trapezoid in a front view. Similarly, the lower end of the third inclined reinforcement part 53 may not intersect with the lower end of the first inclined reinforcement part 51 and may be separated in the left direction from the lower end of the first inclined reinforcement part 51. In this case, the first inclined reinforcement part 51, the third inclined reinforcement part 53, the first base part 10, and the second base part 40 form a trapezoid in a front view. Similarly, the lower end of the fourth inclined reinforcement portion 54 may not intersect with the lower end of the second inclined reinforcement portion 52, and may be separated to the right from the lower end of the second inclined reinforcement portion 52. In this case, the second inclined reinforcement portion 52, the fourth inclined reinforcement portion 54, the first base portion 10, and the second base portion 40 form a trapezoid in a front view.

[0076] (3-8) As shown in Fig. 10, the support 1000 may be provided on the form mounting part 34 with an outer regulating part 120 that regulates outward movement of the form 2000 in the left-right direction and / or an inner regulating part 130 that regulates inward movement of the form 2000 in the left-right direction. The outer regulating part 120 and the inner regulating part 130 are integrated with the form mounting part 34 and extend upward beyond the form mounting part 34.

[0077] (3-9) As shown in FIG. 11A, the form mounting part 34 may be provided with a protruding part 35 protruding upward from the upper surface of the form mounting part 34. The protruding part 35 restricts the left-right movement of the spacing retainer 4000 mounted on the form mounting part 34. The spacing retainer 4000 restricts the left-right movement of the form 2000 mounted on the spacing retainer 4000. For example, a known spacing retainer such as that disclosed in Japanese Patent No. 7089824 can be used as the spacing retainer 4000. The spacing retainer 4000 includes a base 4100 extending in the left-right direction, an outer restricting part 4200 extending upward from the base 4100, and an inner restricting part 4300 provided inward of the outer restricting part 4200 and extending upward from the base 4100. The distance from the left end of the form mounting portion 34 of the left support 30A to the right end of the form mounting portion 34 of the right support 30B is approximately the same as the left-right length of the base 4100. The base 4100 has an opening 4100a. As shown in FIG. 11B, the protrusion 35 is inserted into the opening 4100a of the base 4100. In one embodiment, the inner regulating portion 4300 is formed by cutting and raising a part of the plate material constituting the base 4100, and the opening 4100a is an opening formed after the inner regulating portion 4300 is cut and raised. As already mentioned, at an actual construction site, a plurality of supports 1000 are arranged at intervals, and the formwork 2000 and the horizontal reinforcement 3100 are placed across the plurality of supports 1000. In order to prevent the spacing retainer 4000 from interfering with the vertical reinforcement 3200, the spacing retainer 4000 is placed on the form mounting portion 34 of the support 1000 that is placed in a location where the vertical reinforcement 3200 is not present.

[0078] (3-10) The horizontal reinforcement placement surface 80 may be a part of the upper surface of the second base 40. That is, the support 1000 may not include the second extension portion 110, and the horizontal reinforcement 3100 may be placed on the upper surface of the second base 40. In this case, the horizontal reinforcement movement restricting portion 90 may extend upward beyond the upper surface of the second base 40.

[0079] (3-11) As shown in Fig. 12, the support tool 1000 does not have to have the vertical reinforcement holding part 70. The support tool 1000 shown in Fig. 12 that does not have the vertical reinforcement holding part 70 is placed in a place where no vertical reinforcement 3200 exists.

[0080] (3-12) The shape of the reinforced portion 60 is not limited to a triangle when viewed from the front, and may be a shape with one side curved, as shown in FIG. [Explanation of symbols]

[0081] 1000 Supports 10 1st base 20 Legs 22 Left front leg 221 Opening 23 Right front leg 25 Left rear leg 26 Right hind leg 261 Opening 30A left column (post) 30B Right pillar (post) 31 Pillar body 311 Part 1 32 Front rib (rib) 33 Rear rib (rib) 34 Formwork placement section 35 Protrusion 40 Second base 50 Reinforcement 51 First inclined reinforcement section 52 Second inclined reinforcement section 53 Third inclined reinforcement section 54 Fourth inclined reinforcement section 55 Vertical reinforcement 60 Strengthening section 70 Vertical bar retaining section 80 Horizontal reinforcement surface 90 Horizontal bar movement control section 120 Outer regulation part 130 Inner regulation part 2000 Formwork 3000 Steel bars 3100 Horizontal stripes 3200 Vertical Stripes 4000 Spacing Holder O Virtual line

Claims

1. A support for supporting a pair of formwork used in forming a concrete foundation and reinforcing bars including horizontal and vertical reinforcing bars embedded in the concrete foundation, A pair of supports separated from each other in the left-right direction, each support including a vertical member extending in the up-down direction and a form placement portion provided on an upper portion of the vertical member on which the form is placed; A horizontal bar placement surface is provided between the pair of columns, on which the horizontal bar is placed; A support device comprising:

2. The vertical member includes a strut body, The support body includes a first portion having a left-right length smaller than a left-right length of a bottom surface of the formwork, The formwork mounting portion has a left-right length greater than the left-right length of the bottom surface of the formwork, The support of claim 1 .

3. The left-right center of the first portion substantially coincides with the left-right center of the formwork mounting portion. The support of claim 2.

4. The vertical members further include ribs; The rib extends in the vertical direction and is perpendicular to the support body. The support of claim 2.

5. The vertical members do not have through holes. A support according to any one of claims 1 to 4.

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