Scaffolding platform

Abstract

To ensure that a rotation regulating tool is provided with a hook member and a lock member, enabling the hook to engage with and disengage from the support frame, while the lock member is covered with a protective member to prevent dirt from adhering to it.SOLUTION: A scaffolding platform includes a ceiling board 3, a pair of support frames 4 whose upper portions are foldably connected to the lower surface of the ceiling board 3, and a rotation regulating device 5 installed between the lower surface of the ceiling board 3 and the midway part of each support frame 4 in the vertical direction in order to change the support frame 4 from the folded position P to the standing position Q and maintain it in the standing position Q. Each support frame 4 is provided with a hook engaging portion 6 in the midway part in the vertical direction. The rotation regulating device 5 includes a linking member 8 whose base is pivotally supported on the lower surface of the ceiling board 3, a hook member 9 that engages with the hook engaging portion 6 at the tip of the linking member 8, a locking member 10 that restricts the disengagement of the hook member 9 from the hook engaging portion 6, and a protective member 11 that is slidably fitted to the linking member 8 in the longitudinal direction and whose position can be changed from a position that covers the locking member 10 to a position that exposes the locking member 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a scaffold base used as a workbench for construction work on an indoor ceiling or the like.

Background Art

[0002] A conventional scaffold base described in Patent Document 1 includes a ceiling board, a pair of support frames whose upper parts are foldably connected to the lower surface of the ceiling board, and a rotation restrictor installed between the lower surface of the ceiling board and the middle part in the vertical direction of each support frame to change the support frames from a folded posture to a standing posture and hold them in the standing posture.

[0003] A conventional rotation restrictor has an upper stay member whose upper end is connected to the lower surface of the ceiling board and a lower stay member whose lower end is connected to the middle part in the vertical direction of the support frame. The lower part of the upper stay member and the upper part of the lower stay member are connected by a pin, and the upper and lower stay members are rotated from a folded state to a substantially straight state and fixed in that state, so that the support frames can be changed from a folded posture to a standing posture.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above prior art, the support frames can be held in a standing posture by expanding the pin-connected upper and lower stay members into a substantially straight state and fixing them in a bent-restricted state. However, the stability of the substantially straight state of the upper and lower stay members is low. Also, when folding the support frames, an impact must be applied to the connection part of the upper and lower stay members to bend them, and the operability of changing the posture is also low. Further, when the pin-connected upper and lower stay members are expanded into a substantially straight state, dirt may adhere near the pin, making the folding operation difficult.

[0006] The present invention aims to provide a scaffolding platform that can solve the problems of the conventional technology described above.

[0007] The present invention aims to provide a scaffolding platform that includes a hook member and a locking member in the rotation restricting device so that the hook can be engaged with and disengaged from the support frame, and a protective member that covers the locking member to prevent dirt from adhering to it. [Means for solving the problem]

[0008] A specific means for solving the problems in the present invention is a scaffolding platform comprising a top board 3, a pair of support frames 4 whose upper parts are foldably connected to the lower surface of the top board 3, and a rotation restricting device 5 installed between the lower surface of the top board 3 and the vertically intermediate portion of each support frame 4 in order to change the support frame 4 from a folded position P to an upright position Q and hold it in the upright position Q, wherein each support frame 4 is provided with a hook engagement portion 6 at the vertically intermediate portion, and the rotation restricting device 5 is characterized by comprising a connecting member 8 whose base is pivotally supported on the lower surface of the top board 3, a hook member 9 that engages with the hook engagement portion 6 at the tip of the connecting member 8, a locking member 10 that restricts the hook member 9 from coming out of the state in which it is engaged with the hook engagement portion 6, and a protective member 11 that is fitted to the connecting member 8 so as to be slidable in the longitudinal direction and can be repositioned from a position that covers the locking member 10 to a position that exposes it. [Effects of the Invention]

[0009] According to the present invention, the stability of the upright position of the support frame and the ease of changing its position can be improved, and dirt can be prevented from adhering to the locking member.

[0010] In other words, the present invention provides a hook member 9 and a locking member 10 on the rotation restricting device 5 so that the hook can be engaged with and disengaged from the support frame 4, thereby improving the stability of the standing position Q of the support frame 4 and the operability of changing its position. Furthermore, even with the locking member 10 provided, it can be covered with the protective member 11 to prevent dirt such as mud from adhering to it. [Brief explanation of the drawing]

[0011] [Figure 1] It is a perspective view showing an embodiment of the present invention. [Figure 2] It is the front view thereof. [Figure 3] It is the plan view thereof. [Figure 4] It is the side view thereof. [Figure 5] It is an enlarged side view of the main part. [Figure 6] It is a bottom perspective view in the folded posture. [Figure 7] It is a front view when the rotation restrictor is engaged. [Figure 8] It is a cross-sectional front view when the rotation restrictor is disengaged. [Figure 9] It is a front view of the main part of the scaffold base. [Figure 10] It is a front view before the rotation restrictor is engaged. [Figure 11] It is an enlarged plan view of the connector. [Figure 12] It is a cross-sectional view taken along the line X-X of FIG. 11. [Figure 13] It is a perspective view of a pair of connecting plates. [Figure 14] It is a plan view of the main part of the scaffold bases arranged adjacent to each other in the longitudinal direction. [Figure 15] It is a perspective view of the scaffold bases arranged adjacent to each other in the longitudinal direction. [Figure 16] It is a plan view of the main part of the scaffold bases arranged adjacent to each other in the lateral direction. [Figure 17] It is a perspective view of the scaffold bases arranged adjacent to each other in the lateral direction.

MODE FOR CARRYING OUT THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0013] In FIGS. 1, 2, 4, and 5, one scaffold base 1 in the standing posture Q is shown, and in FIGS. 3 and 6, the scaffold base 1 in the folded posture P is shown.

[0014] The scaffolding platform 1 is broadly composed of a top board 3, a pair of support frames 4 whose upper parts are foldably connected to the underside of the top board 3, a rotation restricting device 5 that is detachably installed between the underside of the top board 3 and the upper and lower intermediate parts of each support frame 4, and a connecting device 25 positioned at a pair of first diagonal portions S1 on the surface of the top board 3.

[0015] The top panel 3 is assembled by arranging multiple long aluminum formwork plates 3a in parallel, covering its outer perimeter with vertical frame members 3b along the longitudinal direction of the formwork plates 3a and horizontal frame members 3c in a perpendicular direction, and connecting the corners where the vertical frame members 3b and horizontal frame members 3c intersect with corner members 3d, resulting in a rectangular shape in plan view. Numerous drainage holes 3ca are formed in the horizontal frame members 3c.

[0016] Since the top board 3 is rectangular, the pair of vertical frame members 3b form the long vertical sides of the top board 3, and the pair of horizontal frame members 3c form the short horizontal sides of the top board 3, forming a pair of first diagonal sections S1 and a pair of second diagonal sections S2 that intersect the diagonal directions of the first diagonal sections S1 on the top surface (surface).

[0017] Support brackets 14 are fixed to the underside of the four diagonal sections S (S1, S2) of the top board 3 in a downward-projecting manner. The upper part of one support frame 4 is pivotally supported by two support brackets 14 located at both ends of each horizontal frame member 3c, and the support frames 4 come in pairs of two.

[0018] Furthermore, four pivot brackets 17 are fixed to the lower central side of the top plate 3, and the base of the rotation restricting device 5 is pivotally connected to each of these pivot brackets 17.

[0019] Each of the aforementioned support frames 4 comprises a pair of support legs 4A formed from a square hollow material, a horizontal bar 4B of a U-shaped cross section connecting the upper and lower intermediate parts of the pair of support legs 4A, an upper connecting rod 18 of a U-shaped cross section connecting the upper parts, a lower connecting rod 19 of a U-shaped cross section connecting the lower parts, an extendable frame body 20 with caster wheels 16, a rotating locking device 21 located on the upper connecting rod 18, and an extendable locking device 22 located on the lower connecting rod 19.

[0020] The upper part of the support leg 4A is connected to the support bracket 14 via a horizontal axis 15, and is foldable and rotatable from an upright position Q extending downward from the support bracket 14 to a folded position P along the lower surface of the top plate 3. The support bracket 14 is provided with a stopper 14a for setting the support leg 4A to the upright position Q.

[0021] The height of the horizontal axis 15 of one support frame 4 and the other support frame 4 are offset vertically by the width dimension of the support leg 4A, so that in the folded position P, the other support frame 4 is parallel to and overlaps the other support frame 4.

[0022] The rotating locking device 21 is housed inside the upper connecting rod 18 and has a pair of locking rods 21a whose tips extend and retract from both ends of the upper connecting rod 18, and a spring 21b that biases the locking rods 21a in the protruding direction. The protruding tip of each locking rod 21a can pass through the support bracket 14 and the support leg 4A, and its base is bent to form a finger rest 21c.

[0023] The rotation locking device 21 holds the standing position Q of the support frame 4 by passing the tip of the locking rod 21a through the support bracket 14 and the support leg 4A in the standing position Q, and allows rotation to change the position of the support frame 4 from the standing position Q to the folded position P by pulling the tip of the locking rod 21a out of the support bracket 14 via the finger grip portion 21c.

[0024] As shown in Figure 4, the telescopic frame 20 has a base material 37 with caster wheels 16 attached to its lower side, and insert members 38 erected at both ends of the base material 37. This pair of insert members 38 is retractably inserted into the lower part of the support legs 4A, and the height from the caster wheels 16 to the top plate 3 can be adjusted by adjusting the amount of extension or retraction of these insert members 38 (the amount they protrude downward from the support legs 4A).

[0025] The telescopic locking device 22 positioned on the lower connecting rod 19 has a similar configuration to the rotating locking device 21, and is housed inside the lower connecting rod 19. It comprises a pair of locking rods 22a whose tips extend and retract from both ends of the lower connecting rod 19, and a spring 22b that biases the locking rods 22a in the protruding direction. The protruding tip of each locking rod 22a is capable of passing through the support leg 4A and the insertion material 38 of the telescopic frame 20, and its base is bent to form a finger rest 22c.

[0026] The insert material 38 has multiple holes formed in the longitudinal direction through which the locking rod 22a passes. By selecting one of these holes and passing the locking rod 22a through it, the amount of extension or retraction of the telescopic frame 20 can be changed. The telescopic frame 20 shown by the dashed line in Figure 4 is in a state where it protrudes downward from the support leg 4A, raising the top plate 3 to a higher position.

[0027] Each support frame 4 is provided with a pair of hook engagement parts 6 on the horizontal bar 4B at the upper and lower intermediate points. Each of these hook engagement parts 6 is constructed by fixing a plate material to both ends of a short round pipe and then fixing this plate material to the horizontal bar 4B.

[0028] The pair of hook engagement parts 6 on one support frame 4 and the pair of hook engagement parts 6 on the other support frame 4 are offset in the longitudinal direction of the horizontal bar 4B, and four pivot brackets 17 on the lower surface of the top plate 3 are also arranged corresponding to each hook engagement part 6.

[0029] As a result, when both support frames 4 are folded to the folded position P, and the four rotation restrictors 5 are positioned along the underside of the top plate 3, the opposing rotation restrictors 5 are stored side by side without interfering with each other, as shown in Figure 3.

[0030] In Figures 1 to 10, the rotation restricting device 5 includes a connecting member 8 whose base is pivotally supported on the lower surface of the top plate 3, a hook member 9 that engages with the hook engagement portion 6 at the tip of the connecting member 8, a locking member 10 that restricts the hook member 9 from coming out of the state in which it is engaged with the hook engagement portion 6, and a protective member 11 that is fitted to the connecting member 8 so as to be longitudinally slidable and can be repositioned from a position that covers the locking member 10 to a position that exposes it.

[0031] The connecting member 8 is made of pipe material (square pipe material), its base is pivotally supported on the pivot bracket 17 on the lower surface of the top plate 3 so as to be rotatable, and the attachment part 9a of the hook member 9 is inserted and fixed to its tip.

[0032] The hook member 9 has an arc-shaped hook portion 9b protruding from a mounting portion 9a inserted and fixed to the tip of the connecting member 8, and the hook portion 9b engages with the short round pipe of the hook engagement portion 6. The locking member 10 is inserted into the mounting portion 9a so as to be able to move in and out.

[0033] The locking member 10 has a substantially arc shape when viewed from the side, is inserted into an arc-shaped hole 9c formed in the mounting portion 9a, and is biased in the protruding direction by the biasing member 9d. The portion of the locking member 10 that protrudes from the arc-shaped hole 9c protrudes in front of the recess of the hook portion 9b, preventing (locking) the short round pipe of the hook engaging portion 6, which is engaged with the recess of the hook portion 9b, from coming out of the recess. The locking member 10 is unlocked by pushing the locking member 10 into the arc-shaped hole 9c against the biasing member 9d.

[0034] Furthermore, the locking member 10 may be formed in a straight shape when viewed from the side, and the hole 9c of the mounting portion 9a may also be formed in a straight shape.

[0035] The protective member 11 has a U-shaped fitting portion 11a that slidably fits into three surfaces of the connecting member 8, which is made of a square pipe material, and a covering portion 11b that protrudes from the fitting portion 11a and covers the locking member 10 and the hook portion 9b.

[0036] The covering portion 11b of this protective member 11 covers the locking member 10, the hook portion 9b, and the hook engagement portion 6, etc., thereby preventing mud, dust, etc. from entering them.

[0037] Furthermore, since the cover portion 11b covers the locking member 10, the engagement portion between the hook portion 9b and the hook engagement portion 6, etc., when the locking member 10 is pushed away for some reason, for example, by pressure from the hook engagement portion 6, it can prevent the hook engagement portion 6 from detaching from the hook portion 9b, and also plays an auxiliary role in locking the engagement between the hook engagement portion 6 and the hook portion 9b.

[0038] The fitting portion 11a, which has a U-shaped cross-section, has its central part resting on the outer surface of the connecting member 8, and its left and right sides are along the left and right sides of the connecting member 8. Elongated holes 11c are formed in these left and right sides, and the elongated holes 11c are fitted into two guide pins 51 provided on the left and right sides of the connecting member 8.

[0039] Two guide pins 51 provided on the left and right sides of the connecting member 8 are arranged parallel to the longitudinal direction of the connecting member 8, and the protective member 11 can slide in the longitudinal direction of the connecting member 8 within the range of the elongated hole 11c, and the two guide pins 51 prevent the protective member 11 from detaching from the connecting member 8.

[0040] The sliding of the protective member 11 can be done manually, but it can also be done by its own weight. When the support frame 4 shown in Figures 1-5 is in the upright position Q, the protective member 11 is lowered by its own weight, and the flat plate-shaped cover portion 11b is in a position to cover the locking member 10 and the hook portion 9b.

[0041] The cover portion 11b is moved away from the position where it covers the locking member 10 and the hook portion 9b by manually lifting the protective member 11. Once the cover portion 11b is moved away, the locking member 10 can be pushed into the arc-shaped hole 9c, thereby detaching the locking member 10 from the hook engagement portion 6.

[0042] The above operation is performed when the support frame 4 is in an upright position Q. When changing the position of the support frame 4 to a folded position P, the scaffolding platform 1 is transported and stored, so the scaffolding platform 1 is often inverted upside down to change the position of the support frame 4.

[0043] Figures 6 and 10 show the scaffolding platform 1 inverted vertically. When the support frame 4 and the rotation restricting device 5 are inverted vertically, the protective member 11 descends under its own weight, causing the cover portion 11b to shift downward from its position covering the locking member 10 and the hook portion 9b, and change position to expose the locking member 10. This makes it easier to push in the locking member 10, and from this position, the locking member 10 can be pushed in, and the hook member 9 can be released from the hook engagement portion 6.

[0044] When the hook member 9 is released from the hook engagement part 6, the rotation restrictor 5 rotates to align with the underside of the top plate 3, and the support frame 4 also rotates around the horizontal axis 15 to change its position to a folded position P that aligns with the underside of the top plate 3.

[0045] Furthermore, if the scaffolding platform 1 is stored outdoors with its upside down and the support frame 4 folded, rain may fall on the underside of the top board 3. However, the numerous drainage holes 3ca formed in the horizontal frame members 3c allow for drainage, preventing rainwater from accumulating.

[0046] When changing the scaffolding platform 1 from the folded position P in Figure 6 to the standing position Q, the top plate 3 is inverted upside down, the support frame 4 is rotated around the horizontal axis 15 to bring the support legs 4A into contact with the stopper 14a, the rotation restrictor 5 is rotated to rise from the underside of the top plate 3, the protective member 11 remains lowered by its own weight, the hook member 9 is engaged with the hook engagement part 6, and the engagement is locked with the locking member 10. When the scaffolding platform 1 is lifted and inverted upside down in this state, the support frame 4 will be in the standing position Q. The scaffolding platform 1 is formed, and the protective member 11 descends under its own weight, so that the covering portion 11b is in a position to cover the locking member 10 and the hook portion 9b.

[0047] Multiple scaffolding platforms 1 can be placed adjacent to each other in a standing position Q. These can be arranged in two ways: vertically adjacent (as shown in Figures 14 and 15), where horizontal frame members 3c are facing each other and rectangular top boards 3 are placed adjacent along the longitudinal direction; and horizontally adjacent (as shown in Figures 16 and 17), where vertical frame members 3b are facing each other and rectangular top boards 3 are placed adjacent in a direction perpendicular to the longitudinal direction. Connecting devices 25 are used to link the top boards 3 together in these adjacent arrangements.

[0048] In Figures 1 and 3, the top plate 3 is a rectangle in which the vertical sides are longer than the horizontal sides, and support frames 4 are arranged near each horizontal side. The vertical or horizontal sides of the top plate 3 are formed to be in close contact with the vertical or horizontal sides of an adjacent top plate 3. As a result, the surface of the top plate 3 has one pair of first diagonal portions S1 and one pair of second diagonal portions S2 that intersect the diagonal direction with them. When two top plates 3 are placed adjacent to each other, the second diagonal portions S2 of the other top plate 3 are adjacent to the first diagonal portions S1 of one top plate 3.

[0049] In Figures 1, 3, 11, 14, and 16, the connector 25 has a pivot shaft 26 provided at the first diagonal portion S1 of one top plate 3, a connecting plate 27 pivotally supported on the pivot shaft 26 so as to be horizontally rotatable, and a vertical engaging portion 28 and a horizontal engaging portion 29 provided on the connecting plate 27 at a position equal to the distance from the pivot shaft 26. The vertical engaging portion 28 and the horizontal engaging portion 29 are arranged in an equilateral triangle or isosceles triangle with respect to the pivot shaft 26.

[0050] The connecting plate 27 is formed to be repositionable from a retracted position R1 in which both the vertical engaging portion 28 and the horizontal engaging portion 29 overlap the first diagonal portion S1, to a connecting position R2 in which one of the vertical engaging portion 28 or the horizontal engaging portion 29 protrudes outward from the first diagonal portion S1.

[0051] The connecting plate 27 is formed in a roughly triangular shape in plan view, with a fitting hole 27a formed at the first apex for fitting onto the pivot shaft 26, a pin protruding downward from the lower surface of the second apex to form a vertical engaging portion 28, and a pin protruding downward from the lower surface of the third apex to form a horizontal engaging portion 29. Furthermore, a finger rest portion 27b is formed between the second apex and the third apex, between the plate and the surface of the top plate 3 for inserting a finger.

[0052] The first diagonal portion S1 has a first locking portion 34 and a second locking portion 35 formed therein, which engage with the vertical engaging portion 28 and the horizontal engaging portion 29 when the connecting plate 27 is in the retracted position R1. In addition, a connecting locking portion 33 is formed at the second diagonal portion S2 of the other top plate 3.

[0053] The pivot shaft 26 is supported on the top plate 3 so as to be vertically movable, and a biasing member 40 is provided to bias the pivot shaft 26 downward in order to bring the connecting plate 27 close to (in close contact with) the surface of the top plate 3, and the vertical engaging portion 28 and horizontal engaging portion 29 of the connecting plate 27 can engage with and disengage from the first locking portion 34 and the second locking portion 35.

[0054] The connecting locking portion 33 is formed in the second diagonal portion S2, which is adjacent to the first diagonal portion S1 when the two top plates 3 are arranged adjacent to each other in the vertical (or horizontal) direction, and is in a position where the vertical engaging portion 28 (or horizontal engaging portion 29) protruding outward from the first diagonal portion S1 can engage when the connecting plate 27 is in the connecting position R2.

[0055] The first locking portion 34 and the second locking portion 35 are through holes that can prevent the outward movement of the vertical engaging portion 28 and the horizontal engaging portion 29 for the purpose of holding the connecting plate 27 in the retracted position R1, and may be walls that can prevent the outward movement of the vertical engaging portion 28 or the horizontal engaging portion 29 for the purpose of holding the connecting plate 27 in the connecting position R2.

[0056] The connecting locking portion 33 is a through hole, and the vertical engaging portion 28 (or horizontal engaging portion 29) engages when the connecting plate 27 is in the connecting position R2. It is preferable that the connecting locking portion 33 is a through hole that does not move much relative to the vertical engaging portion 28 (or horizontal engaging portion 29).

[0057] The solid line in Figure 11 shows the state in which the connecting plate 27 at the first diagonal portion S1 is held in the retracted position R1. From this state, a finger is placed on the finger rest portion 27b and the connecting plate 27 is pulled up against the biasing member 40, causing the vertical engaging portion 28 and the horizontal engaging portion 29 to be released upward from the first locking portion 34 and the second locking portion 35, and to be rotated in one direction around the pivot shaft 26.

[0058] If the scaffolding platforms 1 are arranged adjacent to each other in the vertical direction, as shown in Figures 11, 14, and 15, the connecting plate 27 is rotated 90 degrees clockwise to the connecting position R2, the vertical engaging portion 28 is aligned with the second locking portion 35, the horizontal engaging portion 29 is aligned with the connecting locking portion 33, and then the two are engaged.

[0059] As a result, the triangular connecting plate 27 is securely held on the top plate 3 by the pivot shaft 26 and the vertical engaging portion 28, and is connected to the vertically adjacent scaffolding platform 1 with minimal play by the horizontal engaging portion 29 and the connecting locking portion 33.

[0060] Furthermore, if the scaffolding platforms 1 are arranged adjacent to each other in the horizontal direction, as shown in Figures 11, 16, and 17, the connecting plate 27 is rotated 90 degrees counterclockwise to the connecting position R2, the horizontal engaging portion 29 is aligned with the first locking portion 34, the vertical engaging portion 28 is aligned with the connecting locking portion 33, and then the two are engaged.

[0061] As a result, the triangular connecting plate 27 is securely held on the top plate 3 by the pivot shaft 26 and the lateral engaging portion 29, and is connected to the laterally adjacent scaffolding platform 1 with minimal play by the vertical engaging portion 28 and the connecting locking portion 33.

[0062] The adjacent connection of the two scaffolding platforms 1 is performed using a total of two sets of connectors 25: one set on one of the adjacent top boards 3 and another set on the other top board 3. This results in a strong connection with minimal relative displacement between the two scaffolding platforms 1.

[0063] In the embodiment described above, the scaffolding platform comprises a top board 3, a pair of support frames 4 whose upper parts are foldably connected to the lower surface of the top board 3, and a rotation restricting device 5 installed between the lower surface of the top board 3 and the vertically intermediate portion of each support frame 4 in order to change the support frame 4 from a folded position P to an upright position Q and hold it in the upright position Q, wherein each support frame 4 is provided with a hook engagement portion 6 at the vertically intermediate portion, and the rotation restricting device 5 comprises a connecting member 8 whose base is pivotally supported on the lower surface of the top board 3, a hook member 9 that engages with the hook engagement portion 6 at the tip of the connecting member 8, a locking member 10 that restricts the hook member 9 from coming out of the state in which it is engaged with the hook engagement portion 6, and a protective member 11 that is longitudinally slidably fitted to the connecting member 8 and can be repositioned from a position that covers the locking member 10 to a position that exposes it.

[0064] With this configuration, the rotation restricting device 5 is equipped with a hook member 9 and a locking member 10, allowing for easy and simple hook engagement and disengagement with the hook engagement portion 6 of the support frame 4. This improves the stability of the upright position Q of the support frame 4 and the operability of changing its position. Furthermore, even with the locking member 10 in place, it can be covered by the protective member 11 to prevent dirt such as mud from adhering to it.

[0065] Furthermore, in the above embodiment, each support frame 4 has a pair of support legs 4A and a horizontal bar 4B connecting the upper and lower intermediate portions of the pair of support legs 4A. The upper parts of the pair of support legs 4A are connected to a support bracket 14 fixed to the lower surface of the top plate 3 via a horizontal axis 15. A pair of hook engagement parts 6 are provided on the horizontal bar 4B, and the pair of hook engagement parts 6 of one support frame 4 and the pair of hook engagement parts 6 of the other support frame 4 are offset in the longitudinal direction of the horizontal bar 4B.

[0066] With this configuration, when the pair of support frames 4 are changed from an upright position Q to a folded position P, even if the rotation restrictor 5 is long, its position will not be shifted in the longitudinal direction of the horizontal bar 4B and it will not interfere, and the scaffolding platform can be folded down to reduce its vertical width.

[0067] Furthermore, in the above embodiment, the connecting member 8 of the rotation restricting device 5 is made of pipe material, and the hook member 9 has an attachment portion 9a that is inserted and fixed to the tip of the connecting member 8, and an arc-shaped hook portion 9b that protrudes from the attachment portion 9a, and the locking member 10 is inserted into the attachment portion 9a so as to be able to move in and out.

[0068] This configuration allows the hook member 9 and locking member 10 of the rotation restricting device 5 to be constructed simply and securely.

[0069] Furthermore, in the above embodiment, the connecting member 8 of the rotation restricting device 5 is formed of a square pipe material, and the protective member 11 has a fitting portion 11a with a U-shaped cross-section that slidably fits onto three surfaces of the connecting member 8, and a covering portion 11b that protrudes from the fitting portion 11a and covers the locking member 10 and the hook portion 9b.

[0070] This configuration allows for the simple and easy construction of a protective member 11 that covers the locking member 10, effectively preventing dirt such as mud from adhering to the locking member 10.

[0071] It should be noted that the present invention is not limited to the embodiments described above, and the shape, configuration, and combination of the components can also be changed.

[0072] For example, the top board 3 may be rectangular or square, and the vertical frame members 3b and horizontal frame members 3c may be curved, but it is sufficient that the planar shape of the top board 3 of adjacent scaffolding platforms 1 is the same.

[0073] Alternatively, the support frame 4 may omit the telescopic frame body 20 and be provided with caster wheels 16 at the lower end of the support legs 4A. [Explanation of symbols]

[0074] 1. Scaffolding platform 3 Top board 4. Support frame 4A Support leg 4B horizontal bar 5 Rotation Restrictor 6 Hook engagement part 8. Connecting materials 9 Hook member 9a Mounting part 9b Hook section 10 Locking member 11 Protective member 11a Mating part 11b Cover 11c long hole 14. Support bracket 15 Horizontal axis 16 caster wheels 17 Pivot bracket 18 Upper connecting rod 19 Lower connecting rod 20 Extendable frame 21 Rotating locking mechanism 22 Telescopic locking mechanism 23 Horizontal axis 25 Connectors 26 Pivot axis 27 Connecting plate 27a Fitting hole 27b Finger rest 28 Vertical engagement portion 29 Lateral engagement portion 33 Connection locking part 34 First locking section 35 Second locking section 40. Biasing member 51 Guide pins P Folded position Q: Standing posture R1 Evacuation Position R2 connection position S1 First diagonal section S2 Second diagonal section

Claims

1. A scaffolding platform comprising a top board (3), a pair of support frames (4) whose upper parts are foldably connected to the underside of the top board (3), and a rotation restricting device (5) installed between the underside of the top board (3) and the vertically intermediate part of each support frame (4) in order to change the support frames (4) from a folded position (P) to an upright position (Q) and hold them in the upright position (Q), Each of the aforementioned support frames (4) is provided with a hook engagement portion (6) in the middle of the vertical direction. The aforementioned rotation restricting device (5) is characterized by comprising a connecting member (8) whose base is pivotally supported on the lower surface of the top plate (3), a hook member (9) at the tip of the connecting member (8) that engages with the hook engagement portion (6), a locking member (10) that restricts the hook member (9) from coming out of the state in which it is engaged with the hook engagement portion (6), and a protective member (11) that is fitted to the connecting member (8) so as to be slidable in the longitudinal direction and can be repositioned from a position that covers the locking member (10) to a position that exposes it.

2. Each of the support frames (4) has a pair of support legs (4A) and a horizontal bar (4B) connecting the upper and lower intermediate parts of the pair of support legs (4A), the upper parts of the pair of support legs (4A) are connected to a fixed bracket (14) on the lower surface of the top plate (3) via a pivot shaft (15), and a pair of hook engagement parts (6) are provided on the horizontal bar (4B). The scaffolding platform according to claim 1, characterized in that the pair of hook engagement portions (6) of one support frame (4) and the pair of hook engagement portions (6) of the other support frame (4) are offset in the longitudinal direction of the horizontal bar (4B).

3. The connecting member (8) of the rotation restricting device (5) is made of pipe material, The scaffolding platform according to claim 1 or 2, characterized in that the hook member (9) has an attachment portion (9a) that is inserted and fixed to the tip of the connecting member (8) and an arc-shaped hook portion (9b) that protrudes from the attachment portion (9a), and a locking member (10) is inserted into the attachment portion (9a) so as to be retractable.

4. The connecting member (8) of the rotation restricting device (5) is made of a square pipe material. The scaffolding platform according to claim 3, characterized in that the protective member (11) has a U-shaped fitting portion (11a) in cross-section that slidably fits into three surfaces of the connecting member (8), and a covering portion (11b) that protrudes from the fitting portion (11a) and covers the locking member (10) and the hook portion (9b).

Images