Scaffold for pouring concrete

Abstract

To provide a scaffold for pouring concrete that can be easily attached and detached to a formwork for precast concrete.SOLUTION: A scaffold for pouring concrete comprises a plurality of scaffold panels 21 provided outside of a side face portion 12 of a formwork 11 and forming a work floor 29 along the side face portion 12. The scaffold panel 21 has: a scaffold plate 25 provided so as to protrude outward from the side face portion 12; a hooking portion 26 provided at the side face portion 12 side of the scaffold plate 25 and capable of hooking from above onto a hooked portion 15 provided in the side face portion 12; and an abutment portion provided below the hooking portion 26 and capable of abutting against an opposing plate portion of the hooked portion 15. The hooking portion 26 is hooking onto the hooked portion 15 and the abutting portion is abutted against the opposing plate portion, such that the scaffold panel 21 is removably attached to the outside of the side face portion 12.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a concrete pouring scaffolding that is attached to a formwork for precast concrete. [Background technology]

[0002] When manufacturing concrete products such as concrete walls on-site, a formwork is constructed and concrete is poured into the formwork. Pouring concrete involves pouring the concrete into the formwork and applying a vibrator to the concrete inside the formwork. Since these tasks are carried out from above the formwork, scaffolding is usually attached to the side of the formwork and concrete is poured on top of the scaffolding.

[0003] Patent Document 1 discloses a scaffold for pouring concrete that is detachably attached to a formwork. The scaffold of Patent Document 1 has a plurality of support brackets that are detachably attached to the side of the formwork, and a scaffolding board that is installed across the support brackets. Since various concrete products are constructed at construction sites, the sizes and shapes of the formwork vary accordingly. In this regard, the scaffold of Patent Document 1 allows the spacing and number of support brackets to be appropriately set according to the size and shape of the formwork, so that a scaffold can be suitably constructed according to the size and shape of the formwork.

[0004] In addition to the above-mentioned cast-in-place concrete products, concrete products also include precast concrete products manufactured in manufacturing plants. Precast concrete products are also manufactured by pouring concrete into forms, just like cast-in-place concrete products. When pouring concrete, scaffolding is attached to the sides of the forms, and pouring is carried out on the scaffolding.

[0005] Also, unlike cast-in-place concrete products, precast concrete products are generally manufactured in large numbers using the same formwork. In the case of cast-in-place concrete, the formwork is dismantled after the concrete product is manufactured, which requires the scaffolding to be removed from the formwork. In contrast, with precast concrete, the formwork is left in place (i.e. not dismantled) and concrete products are repeatedly manufactured using the same formwork, so there is generally no need to remove the scaffolding from the formwork. For this reason, scaffolding for precast concrete is sometimes attached to the formwork by welding. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 7-40895 Summary of the Invention [Problem to be solved by the invention]

[0007] Meanwhile, forms for precast concrete may be transported by truck to other manufacturing plants, warehouses, etc. In this case, if the scaffolding remains attached to the formwork, it may protrude from the loading platform of the truck, causing a risk of impeding transportation. Furthermore, if the scaffolding remains attached to the formwork when storing it in a warehouse, etc., it may take up a large amount of storage space. Therefore, it becomes necessary to remove the scaffolding from the formwork when transporting or storing it.

[0008] However, in the above-mentioned configuration in which the scaffolding is fixed to the formwork by welding, it is considered that the work of removing the scaffolding from the formwork is difficult. Furthermore, when the formwork is to be used again in the manufacturing plant, it is necessary to attach the scaffolding to the formwork by welding, and this attachment work is also considered to be difficult.

[0009] Therefore, it is conceivable to use the detachable scaffolding (cast-in-place scaffolding) of Patent Document 1 as the scaffolding to be attached to the formwork (for precast concrete). However, when using the scaffolding of Patent Document 1, the work of attaching each of the multiple support brackets to the formwork and the work of hanging scaffolding boards on each support bracket are required. In addition, when removing the scaffolding from the formwork, the work of removing the scaffolding boards from the support brackets and the work of removing each support bracket from the formwork are required. Therefore, with the scaffolding of Patent Document 1, the work of attaching and detaching the scaffolding to and from the formwork (for precast concrete) may take a long time.

[0010] The present invention has been made in consideration of the above circumstances, and its main object is to provide a concrete pouring scaffolding that can be easily attached and detached to a formwork for precast concrete. [Means for solving the problem]

[0011] In order to solve the above problems, the concrete pouring scaffolding of the present invention is A concrete pouring scaffolding attached to a formwork for precast concrete, A plurality of or one scaffold panels are provided on the outside of the side surface of the formwork to form a work floor along the side surface, The scaffold panel comprises: A scaffolding board provided so as to protrude outward from the side surface portion; A hook portion provided on the side surface side of the scaffolding board and capable of being hooked from above onto a hooked portion provided on the side surface; a contact portion provided below the hook portion and capable of contacting the contacted portion provided on the side surface portion, The hooking portion is hooked onto the hooked portion and the abutting portion is abutted against the abutted portion, so that the scaffolding panel is removably attached to the outer side of the side portion. Effect of the Invention

[0012] The concrete pouring scaffolding of the present invention is attached to a formwork for precast concrete and includes one or more scaffolding panels that are provided on the outside of the side of the formwork and form a working floor. The scaffolding panel has a scaffolding board that is provided so as to protrude outward from the side of the formwork, a hooking part that can be hooked from above onto a hooked part provided on the side of the formwork, and an abutting part that is provided below the hooking part and can abut on an abutted part provided on the side of the formwork. The scaffolding panel is detachably attached to the outside of the side of the formwork by hooking the hooking part onto the hooked part and abutting the abutting part onto the abutted part.

[0013] In this mounting configuration of the scaffolding panel, the scaffolding panel can be mounted to the formwork by a simple operation of hooking the hooking part onto the hooked part and abutting the abutting part onto the abutted part. Furthermore, when removing the scaffolding panel from the formwork, it can be basically removed by simply removing the hooking part from the hooked part. This allows the scaffolding panel to be easily attached and detached to the formwork, and therefore allows the concrete pouring scaffolding to be easily attached and detached to the formwork. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2(a) is a front view showing a concrete pouring scaffolding attached to a formwork for precast concrete, and FIG. 2(b) is a side view. [Diagram 2] 1A is a plan view showing each scaffolding panel attached to the outside of the side portion of the formwork, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (a). [Diagram 3] (a-1) is a plan view showing one of the scaffolding panels, (a-2) is a bottom view, (b-1) is a plan view showing the other scaffolding panel, and (b-2) is a bottom view. [Figure 4] (a) is a side view of the scaffolding panel seen from direction C in Figure 3(b-1), (b) is a cross-sectional view taken along line DD in Figure 3(b-1), and (c) is a cross-sectional view showing the scaffolding boards that make up the scaffolding panel. [Diagram 5] A plan view showing each scaffolding panel in another embodiment attached to the outside of the side portion of the formwork. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 (a) is a front view of a concrete pouring scaffold 20 attached to a precast concrete formwork 11, and (b) is a side view. For convenience, the formwork 11 is shown by a two-dot chain line in Figs. 1 (a) and (b) (this also applies to Figs. 2 (a) to (c) and Fig. 5 described later).

[0016] As shown in Figs. 1(a) and (b), the formwork 11 is a rectangular steel formwork that is installed in a precast concrete product manufacturing plant. A concrete pouring scaffold 20 (hereinafter, abbreviated as "scaffold 20") is attached to the side portion 12 of the formwork 11. The scaffold 20 includes a plurality of (specifically, two) scaffold panels 21 provided on the outside of the side portion 12 of the formwork 11, a plurality of (specifically, three) handrail portions 22 erected on the periphery of the scaffold panels 21, and a ladder portion 23 for ascending and descending onto the scaffold panels 21. The plurality of scaffold panels 21 are arranged in a line along the side portion 12 of the formwork 11. The scaffold panels 21 form a working floor 29 that extends along the side portion 12 (see also Fig. 2(a)). Concrete pouring work is carried out on the working floor 29.

[0017] Next, the configuration of the scaffolding panel 21 will be described with reference to Figs. 2 to 4. Fig. 2 (a) is a plan view showing the state in which each scaffolding panel 21 is attached to the outside of the side portion 12 of the formwork 11, (b) is a cross-sectional view along the line AA in (a), and (c) is a cross-sectional view along the line BB in (a). Fig. 3 (a-1) is a plan view showing one scaffolding panel 21A of each scaffolding panel 21, and (a-2) is a bottom view. Also, (b-1) in Fig. 3 is a plan view showing the other scaffolding panel 21B, and (b-2) is a bottom view. Fig. 4 (a) is a side view of the scaffolding panel 21B seen from the C direction in Fig. 3 (b-1), (b) is a cross-sectional view along the line DD in Fig. 3 (b-1), and (c) is a cross-sectional view showing the scaffolding board 25 constituting the scaffolding panel 21.

[0018] As shown in Fig. 2(a), each scaffolding panel 21 (21A, 21B) is attached to the side surface portion 12 of the formwork 11 via a scaffolding support 14. As shown in Figs. 2(a) to (c), the scaffolding support 14 is made of a channel steel with a U-shaped cross section that extends laterally along the side surface portion 12 of the formwork 11. The scaffolding support 14 is arranged with its groove facing downward, and in this arranged state is fixed to the side surface portion 12 by welding.

[0019] The outer surface of the scaffolding support 14 (the side opposite the side surface portion 12) is provided with a hooked portion 15 for hooking the scaffolding panel 21 (hooking portion 26, described in detail below). The hooked portion 15 is formed in a U-shape from a steel plate. The hooked portion 15 has an opposing plate portion 15a that faces the outer surface of the scaffolding support 14 at a distance, and a pair of flange portions 15b that extend from both ends of the opposing plate portion 15a in the width direction toward the scaffolding support 14. The pair of flange portions 15b are fixed to the outer surface of the scaffolding support 14 by welding.

[0020] A plurality of hooked parts 15 are arranged in the longitudinal direction of the scaffolding receiver 14, and three hooked parts 15 are arranged in this embodiment. Each hooked part 15 includes a hooked part 15A having a large width and a hooked part 15B having a small width. The hooked parts 15B are arranged at both ends of the longitudinal direction of the scaffolding receiver 14, and the hooked parts 15A are arranged in the intermediate part (more specifically, the center part) between the hooked parts 15B. Note that the hooked part 15A is provided with a reinforcing member 17 in the center part in the lateral direction to connect the opposing plate part 15a and the scaffolding receiver 14.

[0021] Each scaffolding panel 21 is disposed on the opposite side of the formwork 11 from the side surface portion 12 across the scaffolding support 14. Each scaffolding panel 21 is hooked onto each hooked portion 15 of the scaffolding support 14 and attached to the scaffolding support 14 in this hooked state.

[0022] Next, the configuration of each scaffold panel 21 will be described in detail. As shown in Fig. 2(a), Fig. 3(a-1) and (b-1), each scaffold panel 21 has a scaffold board 25, and a plurality of (specifically, two) hook parts 26 and a plurality of handrail mounting parts 27 provided on the scaffold board 25. Although each scaffold panel 21 has a part of its configuration different from the others, such as the arrangement of the handrail mounting parts 27, they basically have the same configuration. Therefore, the configuration of each scaffold panel 21 will be described collectively below.

[0023] The scaffolding boards 25 of each scaffolding panel 21 extend along the side surface 12 (in other words, the scaffolding receiver 14) of the formwork 11 and are provided so as to protrude laterally from the side surface 12 (in other words, the scaffolding receiver 14). In this case, the scaffolding boards 25 of each scaffolding panel 21 are arranged in parallel along the side surface 12, and a work floor 29 is formed by each of the scaffolding boards 25.

[0024] The scaffolding board 25 of each scaffolding panel 21 is formed of checkered steel plate and has a rectangular shape in a plan view. The scaffolding board 25 is arranged with its longitudinal direction facing the longitudinal direction of the scaffolding receiver 14 (in other words, the width direction of the side surface portion 12). The scaffolding board 25 is also provided so as to protrude outward (laterally) from the side surface portion 12 (and further the scaffolding receiver 14). In this case, the protruding direction of the scaffolding board 25 is the short side direction of the scaffolding board 25.

[0025] As shown in Figures 4(a) to (c), the scaffolding board 25 has a floor board portion 25a forming a floor surface 28, a hanging board portion 25b extending downward from an edge portion of the floor board portion 25a on the side surface portion 12 side, and an upright board portion 25c extending upward from an edge portion of the floor board portion 25a on the opposite side surface portion 12 side. In other words, the scaffolding board 25 is formed to have a substantially Z-shaped cross section. The floor board portion 25a of the scaffolding board 25 is formed in a rectangular shape that is long in the longitudinal direction of the scaffolding support 14, and the floor surface 28 is located at the same height as the upper surface of the scaffolding support 14.

[0026] As shown in Figs. 2(a) to (c), each hook portion 26 of scaffold panel 21 is provided on the side surface portion 12 side of scaffold board 25. Each hook portion 26 is disposed on both ends of scaffold board 25 in the longitudinal direction. Each hook portion 26 is made of a steel L-shaped angle. Each hook portion 26 has fixed plate portion 26a fixed to floor surface 28 of scaffold board 25 (floor board portion 25a) by welding, and hanging plate portion 26b extending downward from fixed plate portion 26a. A part of fixed plate portion 26a protrudes toward side surface portion 12 side of scaffold board 25, and hanging plate portion 26b extends downward from the protruding portion. Also, hanging plate portion 26b faces hanging plate portion 25b of scaffold board 25 at a distance.

[0027] Hanging plate portion 26b of hook portion 26 is inserted from above into the inside of hooked portion 15 and engages with opposing plate portion 15a of hooked portion 15. This causes hook portion 26 to be hooked onto hooked portion 15 from above. In addition, fixed plate portion 26a of hook portion 26 is placed on the upper end surface of opposing plate portion 15a of hooked portion 15.

[0028] Of the total of four hooking parts 26 provided on each scaffolding panel 21, the two hooking parts 26 arranged on the boundary part (hereinafter referred to as panel boundary part 35) side of each scaffolding panel 21 are both hooked onto hooked part 15A, and the two hooking parts 26 arranged on the opposite side to the panel boundary part 35 side are each hooked onto hooked part 15B. The two hooking parts 26 hooked onto hooked part 15A are each hooked on both sides of reinforcing material 17.

[0029] Each handrail mounting portion 27 is for mounting the handrail portion 22. Each handrail mounting portion 27 is formed in a cylindrical shape extending in the vertical direction, and is made of, for example, a metal pipe material. Each handrail mounting portion 27 is arranged on the peripheral portion of the scaffolding board 25 and fixed to the scaffolding board 25 by welding. In detail, the handrail mounting portion 27 is arranged on the peripheral portion of the four sides of the scaffolding board 25, on the peripheral portion on the opposite side surface portion 12 side and on the peripheral portion opposite the panel boundary portion 35. In the following, the handrail mounting portion 27 arranged on the peripheral portion on the opposite side surface portion 12 side is also referred to as the handrail mounting portion 27a, and the handrail mounting portion 27 arranged on the peripheral portion opposite the panel boundary portion 35 is also referred to as the handrail mounting portion 27b.

[0030] Each handrail mounting portion 27a is fixed by welding to the upright plate portion 25c of the scaffolding board 25. In addition, a side plate portion 36 rising upward from the edge portion of the floor plate portion 25a of the scaffolding board 25 opposite the panel boundary portion 35 side is fixed to the edge portion. Each handrail mounting portion 27b is fixed to the side plate portion 36 by welding. Each handrail mounting portion 27a, 27b is arranged so as to extend downward from the floor plate portion 25a.

[0031] Next, the configuration of the back side of the scaffolding board 25 will be described. As shown in Figs. 3(a-2), (b-2) and 4(a), (b), a plurality of ribs 31-33 are provided on the back side of the scaffolding board 25. These ribs 31-33 are formed to protrude downward from the lower surface (back surface) of the floor board portion 25a. Each of the ribs 31-33 is made of metal and fixed to the floor board portion 25a by welding. Each of the ribs 31-33 includes a plurality of ribs 31, 32 extending in the short direction of the scaffolding board 25 (in other words, the direction in which the scaffolding board 25 protrudes from the side surface portion 12) and a plurality of ribs 33 extending in the long direction of the scaffolding board 25.

[0032] Each of the ribs 31, 32 extends over the entire area in the short direction of the scaffolding board 25, and one end is connected to the hanging board portion 25b. Each of the ribs 31, 32 is formed so that the protruding height from the lower surface of the floor board portion 25a increases toward the hanging board portion 25b side (in other words, the side surface portion 12 side). Each of the ribs 31, 32 includes a plurality of (specifically, two) ribs 31 located at both ends of the scaffolding board 25 in the longitudinal direction, and a plurality of (specifically, two) ribs 32 located between the ribs 31.

[0033] Each rib 31 is located at the same position as the hook portion 26 in the longitudinal direction of the scaffolding board 25. The protruding height of each rib 31 is higher than the protruding height of each rib 32. As shown in FIG. 2(b), the protruding height of each rib 31 at the end on the side surface portion 12 side is larger than the vertical width of the hanging plate portion 25b. Of the end of the rib 31 on the side surface portion 12 side, the part below the lower end of the hanging plate portion 25b is an abutment portion 37 that abuts against the opposing plate portion 15a of the hooked portion 15. The abutment portion 37 abuts against the opposing plate portion 15a in the overhanging direction of the scaffolding board 25. In this case, the abutment portion 37 is formed by the end of the rib 31 on the side surface portion 12 side. In addition, the abutment portion 37 is arranged below the hook portion 26.

[0034] More specifically, the abutting portion 37, which is the portion of the end of the rib 31 on the side surface portion 12 side that is lower than the lower end of the hanging plate portion 25b, includes a protruding portion that protrudes toward the side surface portion 12 side by the thickness of the hanging plate portion 25b or more, and the protruding portion abuts against the opposing plate portion 15a. The rib 31 corresponds to the "first rib." The opposing plate portion 15a corresponds to the "contacted portion."

[0035] Each rib 31 includes a rib 31a disposed at the same position as the handrail mounting portion 27a in the longitudinal direction of the scaffolding plank 25 (in other words, the thickness direction of the rib 31). The rib 31a extends toward the handrail mounting portion 27a and is connected to the handrail mounting portion 27a by welding. Each rib 32 includes a rib 32a disposed at the same position as the handrail mounting portion 27a in the longitudinal direction of the scaffolding plank 25 (in other words, the thickness direction of the rib 32). The rib 32a extends toward the handrail mounting portion 27a and is connected to the handrail mounting portion 27a by welding. Each of the ribs 31a, 32a corresponds to a "second rib."

[0036] Each rib 33 is disposed at the same position as the handrail mounting portion 27b in the short side direction of the scaffolding board 25 (in other words, the thickness direction of the rib 33). One end of each rib 33 is connected to the rib 31, and the other end is connected to the handrail mounting portion 27b. In this case, each rib 33 extends toward the handrail mounting portion 27b and is connected to the handrail mounting portion 27b by welding. Each rib 33 corresponds to a "second rib."

[0037] The above is the description of the scaffolding panel 21. The scaffolding panel 21 is detachably attached to the outside of the side surface portion 12 by each hooking portion 26 being hooked from above onto the hooked portion 15 provided on the side surface portion 12 of the formwork 11 and by the abutting portion 37 of each rib 31 of the scaffolding board 25 abutting against the opposing plate portion 15a of the hooked portion 15.

[0038] As shown in Fig. 2(a) and (c), a pressing member 38 that presses down the scaffolding panel 21 from above is attached to the scaffolding receiver 14 provided on the side portion 12 of the formwork 11. A plurality of pressing members 38 (specifically, two pressing members 38) are provided for each scaffolding panel 21, and press down the floor surface 28 of the scaffolding board 25 of the scaffolding panel 21. The pressing member 38 is formed in a rectangular plate shape extending in the direction in which the scaffolding panel 21 protrudes, and is disposed across the upper surface of the scaffolding receiver 14 and the floor surface 28 of the scaffolding board 25. The pressing member 38 is fixed to the upper surface of the scaffolding receiver 14 by a bolt 39. As a result, the pressing member 38 is detachably attached to the scaffolding receiver 14.

[0039] Specifically, the holding member 38 is formed of an elastically deformable steel plate, and has a bent portion 38a that is bent so as to be convex upward when viewed from the longitudinal direction of the scaffolding support 14. When the holding member 38 is fixed to the scaffolding support 14 with bolts 39, the bent portion 38a is in an expanded state. In this case, an elastic force (restoring force) is generated in the holding member 38 such that the bent portion 38a tries to return to the bent side. The floor surface 28 of the scaffolding board 25 is held down from above by the holding member 38 due to the elastic force.

[0040] Next, the configuration of the handrail section 22 and the ladder section 23 will be described.

[0041] 1(a) and (b), the handrail sections 22 are erected on the peripheral portion of the scaffolding board 25 of each scaffolding panel 21 (21A, 21B). Each handrail section 22 is arranged on the peripheral portion of three sides of the four sides of the working floor 29 formed by each scaffolding panel 21 (scaffolding board 25), excluding the peripheral portion on the side of the side surface portion 12. In this case, in each scaffolding panel 21, the handrail sections 22 are arranged on the peripheral portion on the opposite side surface portion 12 side and the peripheral portion on the opposite side to the panel boundary portion 35, among the peripheral portions of the four sides of the scaffolding board 25.

[0042] Each handrail section 22 has a plurality of handrail posts 41 and an upper rail 42 that connects the upper ends of each handrail post 41. The handrail posts 41 and the upper rail 42 are formed from a cylindrical pipe material. The lower end of each handrail post 41 is inserted from above into the handrail mounting section 27, and in this inserted state is fixed to the handrail mounting section 27 by a fixing screw (not shown). In this way, the lower end of the handrail section 22 is detachably attached to each handrail mounting section 27.

[0043] The upper end of ladder section 23 is fixed to upright board section 25c of scaffolding board 25 with bolt 45, and its lower section is fixed to side section 12 of formwork 11 with a bolt (not shown) via fixing bar 46. This allows ladder section 23 to be detachably attached to scaffolding board 25. In addition, in this attached state, ladder section 23 has its lower end located above (for example, 20 to 30 cm above) floor surface F of the manufacturing factory.

[0044] According to the configuration of this embodiment described in detail above, the following excellent effects can be obtained.

[0045] The scaffolding 20 is provided on the outside of the side surface 12 of the formwork 11 and includes a plurality of scaffolding panels 21 forming a working floor 29. The scaffolding panel 21 has a scaffolding board 25 provided so as to protrude outward from the side surface 12 of the formwork 11, a hooking portion 26 capable of being hooked from above onto a hooked portion 15 provided on the side surface 12 of the formwork 11, and an abutting portion 37 provided below the hooking portion 26 and capable of abutting against an opposing plate portion 15a of the hooked portion 15. The scaffolding panel 21 is removably attached to the outside of the side surface 12 by hooking the hooking portion 26 onto the hooked portion 15 and abutting the abutting portion 37 against the opposing plate portion 15a of the hooked portion 15.

[0046] In this mounting configuration of the scaffolding panel 21, the scaffolding panel 21 can be mounted to the formwork 11 by the simple task of hooking the hooking portion 26 to the hooked portion 15 and abutting the abutting portion 37 against the opposing plate portion 15a. Furthermore, when removing the scaffolding panel 21 from the formwork 11, it can basically be removed simply by removing the hooking portion 26 from the hooked portion 15. This allows the scaffolding panel 21 to be easily attached and detached to the formwork 11, and therefore the scaffolding 20 to be easily attached and detached to the formwork 11.

[0047] When concrete is poured using the formwork 11, the concrete in the formwork 11 may be vibrated to remove air bubbles in the concrete. In that case, there is a risk that the scaffolding panel 21 may rise up due to the vibration of the formwork 11. Therefore, there is a concern that the hooking portion 26 of the scaffolding panel 21 may come off the hooked portion 15 of the formwork 11. In view of this, in the above embodiment, a pressing member 38 that presses the scaffolding panel 21 from above is attached to the outside of the side portion 12 of the formwork 11. This makes it possible to prevent the scaffolding panel 21 from rising up, and therefore to prevent the scaffolding panel 21 from coming off the hooked portion 15.

[0048] Furthermore, in the pouring of precast concrete, a form vibrator is often used to vibrate the concrete by vibrating the form 11 itself. In this case, since the form 11 is subjected to large vibrations, it is very significant that the holding member 38 can provide the above-mentioned effect.

[0049] Since the scaffold board 25 has the hanging board portion 25b and the standing board portion 25c in addition to the floor board portion 25a, the cross-sectional shape of the scaffold board 25 is made to be approximately Z-shaped. This can improve the strength of the scaffold board 25. In addition, of the hanging board portion 25b and the standing board portion 25c, the standing board portion 25c is arranged at the edge portion of the floor board portion 25a on the opposite side surface portion 12 side, and the hanging board portion 25b is arranged at the edge portion of the floor board portion 25a on the side surface portion 12 side. As a result, in a configuration in which the pressing member 38 presses the floor surface 28 of the scaffold board 25 (floor board portion 25a) from above, the standing board portion 25c does not get in the way of the pressing member 38. In addition, since the standing board portion 25c is arranged as described above, it is possible to prevent objects from falling from the floor surface 28 of the scaffold board 25 to the opposite side surface portion 12 side.

[0050] The scaffolding panel 21 is arranged along the side surface 12 of the formwork 11, and a work floor 29 is formed by the scaffolding panels 21. In this case, the length of the scaffolding panels 21 in the arrangement direction of the scaffolding panels 21 can be shortened. Therefore, the weight of the scaffolding panels 21 can be reduced. This makes it possible to attach and detach the scaffolding panels 21 to and from the formwork 11 manually, without using equipment such as a crane.

[0051] The scaffolding board 25 has a rib 31 extending in the direction in which the scaffolding board 25 projects as a reinforcing rib provided on the back side thereof. An abutment portion 37 that abuts against the hooked portion 15 (more specifically, the opposing plate portion 15a) provided on the side surface portion 12 is formed by the end of this rib 31 on the side surface portion 12. In this case, the scaffolding board 25 can be reinforced while preventing the scaffolding board 25 from sinking when a worker stands on the scaffolding board 25.

[0052] The handrail section 22 is erected on the peripheral portion of the scaffolding board 25, and the lower end of the handrail section 22 is attached to the handrail attachment section 27 provided on the peripheral portion of the scaffolding board 25. In this configuration, when a worker leans on the handrail section 22 and a load is applied to the handrail attachment section 27, the handrail attachment section 27 may tilt. In that case, the handrail section 22 may tilt accordingly. In this respect, in the above embodiment, the scaffolding board 25 has ribs 31a, 32a, and 33 that extend toward the handrail attachment section 27 and are connected to the handrail attachment section 27 as reinforcing ribs. In this case, the handrail attachment section 27 can be prevented from tilting, and thus the handrail section 22 can be prevented from tilting. This makes it possible to reinforce the scaffolding board 25 while preventing the handrail section 22 from tilting.

[0053] The present invention is not limited to the above embodiment, and may be implemented, for example, as follows.

[0054] (1) In the above embodiment, the scaffolding 20 is configured to include two scaffolding panels 21, but the scaffolding may be configured to include three or more scaffolding panels 21. Also, the scaffolding may be configured to include only one scaffolding panel 21. In short, the number of scaffolding panels 21 may be appropriately determined depending on the size of the formwork 11.

[0055] (2) In the above embodiment, the length of each of the scaffolding panels 21 constituting the scaffolding 20 in the direction in which the scaffolding panels 21 are arranged (in other words, the length of the scaffolding boards 25 in the direction in which the scaffolding panels 21 are arranged) is the same, but this may be changed so that the multiple scaffolding panels constituting the scaffolding include multiple types of scaffolding panels that differ from each other in length in the direction in which the scaffolding panels are arranged. A specific example of this is described below with reference to FIG. 5.

[0056] The scaffolding 50 shown in Fig. 5 comprises a plurality of (specifically, four) scaffolding panels 51, 61 arranged side by side along the side portion 12 of the formwork 11. Each of the scaffolding panels 51, 61 includes a first scaffolding panel 51 and a second scaffolding panel 61 that have mutually different lengths in the arrangement direction of the scaffolding panels 51, 61 (hereinafter referred to as the panel arrangement direction). The length L2 in the panel arrangement direction of the second scaffolding panel 61 (specifically, the scaffolding board 62 of the panel 61) is shorter than the length L1 in the panel arrangement direction of the first scaffolding panel 51 (specifically, the scaffolding board 52 of the panel 51).

[0057] Specifically, the length L2 of the second scaffolding panel 61 is shorter than half the length L1 of the first scaffolding panel 51. Furthermore, a plurality of first scaffolding panels 51 and a plurality of second scaffolding panels 61 (specifically, two of each) are provided. The first scaffolding panels 51 are disposed adjacent to each other, and the second scaffolding panels 61 are disposed on both sides of the first scaffolding panels 51. The length L2 of the second scaffolding panel 61 may be half the length L1 of the first scaffolding panel 51.

[0058] According to the above configuration, the multiple scaffolding panels 51, 61 constituting the scaffolding 50 include the first scaffolding panel 51 and the second scaffolding panel 61, which have different lengths in the panel arrangement direction. In this case, in a configuration in which the multiple scaffolding panels 51, 61 form a working floor 65, it is possible to set the length of the working floor 65 (scaffolding length) in various ways. This allows the length of the working floor 65 to be suitably set according to the size of the formwork 11. In particular, since the length L2 of the second scaffolding panel 61 in the panel arrangement direction is shorter than half the length L1 of the first scaffolding panel 51 in the panel arrangement direction, it is possible to finely adjust the length of the working floor 65.

[0059] (3) In the above example (2), the scaffolding 50 includes two first scaffolding panels 51 and two second scaffolding panels 61, but the number of the first scaffolding panels 51 and the number of the second scaffolding panels 61 do not necessarily have to be two. For example, the length of the work floor may be increased by increasing the number of at least one of the first scaffolding panels 51 and the second scaffolding panels 61 to three or more. Also, the length of the work floor may be decreased by decreasing the number of at least one of the first scaffolding panels 51 and the second scaffolding panels 61 to one. In short, the number of each scaffolding panel 51, 61 may be appropriately determined according to the size of the formwork 11.

[0060] (4) In the above embodiment, the scaffolding board 25 has a floor board portion 25a, a hanging board portion 25b, and an upright board portion 25c and is formed to have a Z-shaped cross section, but it may be formed to have an L-shaped cross section by eliminating either one of the hanging board portion 25b or the upright board portion 25c. Also, it may be formed to have a flat board shape by eliminating both the hanging board portion 25b and the upright board portion 25c.

[0061] (5) In the above embodiment, the end of the rib 31 on the side surface portion 12 side forms the abutment portion 37 that can abut against the opposing plate portion 15a of the hooked portion 15, but the abutment portion does not necessarily have to be formed by the rib 31. For example, the hanging plate portion 25b of the scaffolding board 25 may be extended downward from the hooking portion 26, and a part of the extended portion may be used as the abutment portion that can abut against the opposing plate portion 15a of the hooked portion 15. In this case, the end of the rib 31 on the side surface portion 12 side may be connected to the abutment portion. In this way, as in the above embodiment, the scaffolding board 25 can be reinforced while suppressing the scaffolding board 25 from sinking when a worker stands on the scaffolding board 25.

[0062] (6) In the above embodiment, the handrail section 22 is provided on the peripheral portion on the opposite side surface portion 12 side and the peripheral portion on the opposite side to the panel boundary portion 35 side among the peripheral portions of the four sides of the scaffolding board 25, respectively. However, for example, the handrail section 22 may be provided only on the peripheral portion on the opposite side surface portion 12 side among the peripheral portions of the four sides of the scaffolding board 25. In this case, the handrail section 22 is provided only on the peripheral portion of one side among the peripheral portions of the four sides. Note that, although the claims state that "the scaffolding board is provided with a handrail section erected on the peripheral portion of the scaffolding board," this description is included as long as the handrail section is erected on the peripheral portion of at least one side among the peripheral portions of the four sides of the scaffolding board 25.

[0063] (7) In the above embodiment, each hooked portion 15 is provided on the side portion 12 of the formwork 11 via the scaffolding support 14, but it is also possible to provide each hooked portion 15 directly on the side portion 12 of the formwork 11 without providing the scaffolding support 14. [Explanation of symbols]

[0064] 11...formwork, 12...side portion, 15...hooked portion, 15a...opposing plate portion as abutted portion, 20...scaffolding for pouring concrete, 21...scaffolding panel, 22...handrail portion, 25...scaffolding board, 25a...floor board portion, 25b...hanging board portion, 25c...standing board portion, 26...hooked portion, 27...handrail attachment portion, 29...work floor, 31...rib as first rib, 31a...rib as second rib, 32a...rib as second rib, 33...rib as second rib, 37...abutment portion, 38...holding member, 51...first scaffolding panel, 61...second scaffolding panel.

Claims

1. A concrete pouring scaffolding attached to a formwork for precast concrete, A plurality of or one scaffolding panels are provided on the outside of the side surface of the formwork to form a work floor along the side surface, The scaffold panel comprises: A scaffolding board provided so as to protrude outward from the side surface portion; A hook portion provided on the side surface side of the scaffolding board and capable of being hooked from above onto a hooked portion provided on the side surface; a contact portion provided below the hook portion and capable of contacting the contacted portion provided on the side surface portion, A scaffolding for pouring concrete, in which the hooking portion is hooked onto the hooked portion and the abutting portion is abutted against the abutting portion, thereby removably attaching the scaffolding panel to the outer side of the side portion.

2. The concrete pouring scaffolding according to claim 1 , further comprising a pressing member that is removably attached to the outer side of the side portion and presses down on the scaffolding panel from above.

3. The holding member holds down the floor surface of the scaffolding board, The scaffolding board is A floor plate portion forming the floor surface; A hanging plate portion extending downward from an edge portion of the floor plate portion on the side surface side; The concrete pouring scaffolding according to claim 2, further comprising an upright plate portion extending upward from an edge portion of the floor plate portion on the opposite side surface side.

4. 4. A concrete pouring scaffolding as claimed in claim 1, comprising a plurality of scaffolding panels arranged side by side along the side portion.

5. The concrete pouring scaffolding according to claim 4, wherein the plurality of scaffolding panels include a first scaffolding panel and a second scaffolding panel having mutually different lengths in an arrangement direction of the scaffolding panels.

6. The concrete pouring scaffolding according to claim 5, wherein the length of the second scaffolding panel in the arrangement direction is less than half the length of the first scaffolding panel in the arrangement direction.

7. A reinforcing rib is provided on the back side of the scaffolding board, The rib includes a first rib extending in the protruding direction, 4. A concrete pouring scaffolding as claimed in claim 1, wherein the abutment portion is formed by an end portion of the first rib on the side portion side, or the end portion of the first rib on the side portion side is connected to the abutment portion.

8. A handrail portion is provided on the peripheral portion of the scaffolding board, A handrail mounting portion to which the lower end portion of the handrail section is attached is provided on the peripheral portion of the scaffolding board, A reinforcing rib is provided on the back side of the scaffolding board, The concrete pouring scaffolding according to any one of claims 1 to 3, wherein the rib includes a second rib extending toward the handrail mounting portion and connected to the handrail mounting portion.

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