Scaffold

Abstract

To improve the support strength and connection strength of an inclined member that supports a horizontal beam member pivotally supported on the upper portion of a pedestal in a horizontal position.SOLUTION: Provided is a scaffolding in which the upper portions of a pair of left and right leg frames 6 are connected by a pair of front and rear horizontal beam members 7 that can be folded from the unfolded horizontal position, each of the left and right leg frames 6 connects a pair of front and rear pedestals 8 with an upper scaffolding plate engaging member 9 and a plurality of intermediate lateral members 10, the front and rear horizontal beam members 7 are pivotally supported on the upper portion of the pedestal 8 via a pivot shaft 11, and the horizontally positioned horizontal beam member 7 and the leg frame 6 are connected by an inclined member 12. The horizontal beam member 7 is pivotally supported via the pivot shaft 11 on the upper portion of the pedestal 8 inside the outer end in a horizontal position. The inclined member 12 is arranged on the opposite surface side of each of the front and rear pedestals 8 in which the upper end is connected to the outer end of the horizontal beam member 7 in a horizontal position via a connecting pin 13, and the lower end is connected to the intermediate lateral member 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a scaffolding for high-place interior work.

Background Art

[0002] As a work platform for high-place interior work, as disclosed in Patent Document 1, it has a gate-shaped base having a pair of left and right leg members with a predetermined front-to-back width and a pair of front and rear cross members connecting the upper ends of the left and right leg members, a detachable at least one scaffolding board arranged between the left and right leg members, and a detachable handrail arranged at the front and rear edges of the scaffolding board. The cross member is composed of a left cross member and a right cross member that can be folded so that the upper parts face each other. The left end of the left cross member and the right end of the right cross member are rotatably attached to the upper ends of the left and right leg members respectively, and the scaffolding board is composed of a left scaffolding board and a right scaffolding board that can be folded so that the lower parts face each other (Claim 1).

[0003] In the above work platform, the outer ends of the front and rear cross members are pivotally supported on the upper part of the leg members via pivot shafts, and the inner part of the horizontal cross member from the outer end and the leg member are connected by an inclined member. This inclined member is arranged on the outer side of the front and rear direction of the leg member.

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 inclined member can support the cross member in a horizontal posture, but since it supports the inner part of the horizontal cross member from the outer end, it is difficult to increase its support strength. Also, since the inclined member is arranged on the outer side of the front and rear direction of the leg member, although it is easy to handle, it is difficult to increase the connection strength between the cross member and the leg member. An object of the present invention is to provide a scaffolding base capable of solving such problems of the prior art.

[0006] An object of the present invention is to provide a scaffolding base capable of improving the support strength and connection strength of an inclined member that supports a cross beam member pivotally supported at the upper part of a leg post in a horizontal posture.

Means for Solving the Problems

[0007] Specific means for solving the problems in the present invention are that a pair of front and rear cross beam members 7 that can be folded from a deployed horizontal posture are connected to the upper parts of a pair of left and right leg frames 6, and each of the left and right leg frames 6 is connected by a pair of front and rear leg posts 8, an upper scaffold board engaging member 9, and a plurality of intermediate horizontal members 10. Each of the front and rear cross beam members 7 is pivotally supported at the upper part of the leg post 8 via a pivot shaft 11, and a cross beam member 7 in a horizontal posture and the leg frame 6 are connected by an inclined member 12. The scaffolding base is characterized in that the cross beam member 7 is pivotally supported at the upper part of the leg post 8 via a pivot shaft 11 inside from the outer end in a horizontal posture, the inclined member 12 is disposed on the opposing surface side of each of the front and rear leg posts 8, the upper end is connected to the outer end of the cross beam member 7 in a horizontal posture via a connecting pin 13, and the lower end is connected to the intermediate horizontal member 10.

Effects of the Invention

[0008] According to the present invention, the cross beam member 7 is pivotally supported at the upper part of the leg post 8 via a pivot shaft 11 inside from the outer end in a horizontal posture, the inclined member 12 is disposed on the opposing surface side of each of the front and rear leg posts 8, the upper end of the inclined member 12 is connected to the outer end of the cross beam member 7 in a horizontal posture via a connecting pin 13, and the lower end of the inclined member 12 is connected to the intermediate horizontal member 10. Thereby, the support strength of the inclined member 12 that supports the cross beam member 7 in a horizontal posture can be increased, and the connection strength between the leg post 8, the cross beam member 7, and the inclined member 12 can be increased.

Brief Description of the Drawings

[0009]

Figure 1

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Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIGS. 1 to 6, the entire scaffolding platform device A for performing high-place interior finishing work in a building interior or the like is shown. The scaffolding platform device A is assembled from a deployable / foldable scaffolding stand 1, a deployable / foldable scaffolding board 3 installed on the scaffolding stand 1, and an assemblable / demountable handrail frame 4 placed on the scaffolding stand 1.

[0011] In FIGS. 1 to 10, the scaffolding stand 1 has the upper parts of a pair of left and right leg frames 6 connected by a pair of front and rear foldable cross beams 7. By deploying the front and rear cross beams 7 to a horizontal posture, a square frame-shaped stand is formed, and by folding the front and rear cross beams 7, the left and right leg frames 6 come close to form a folded posture stand. The left and right foot frames 6 connect a pair of front and rear leg columns 8 with an upper scaffolding board engaging member 9 and a plurality of intermediate horizontal members 10 below it. A pipe material with a front-rear circular, circular, or rectangular cross-sectional shape is used for the leg columns 8, and a caster wheel 51 is provided at its lower end. The scaffolding board engaging member 9 and the intermediate horizontal members 10 use round pipes and are joined by welding or the like on the opposing surface sides of the front and rear leg columns 8.

[0012] Each of the leg columns 8 is formed with a connecting portion 8a for connecting a handrail frame at the upper end, and a bracket 16 for passing through a pivot shaft protruding in the left-right opposing direction is provided at the upper part. The pivot shaft 11 passing through this bracket 16 also passes through the cross beam member 7. That is, the cross beam member 7 is pivotally supported at the upper part of the leg column 8 via the pivot shaft 11 inside from the outer end in a horizontal posture, and the pair of front and rear cross beam members 7 are located inside in the front-rear direction of the front and rear leg columns 8 and the brackets 16 for passing through the pivot shaft.

[0013] Similarly, inclined members 12 are arranged on the inner sides of the front and rear of the leg column 8. This inclined member 12 has hook engaging portions at both the upper and lower ends. The lower hook engaging portion is detachably engaged and connected to the intermediate horizontal member 10 below the scaffolding board engaging member 9, and the upper hook engaging portion is detachably engaged and connected to the outer end of the cross beam member 7 in a horizontal posture via a connecting pin 13. The upper hook engaging portion can be engaged and connected to the scaffolding board engaging member 9 instead of the connecting pin 13.

[0014] The front and rear cross beam members 7 are each provided with trapezoidal brackets 18 with partially overlapping opposing ends of the left and right short rods 7a. A folding pivot pin 19 is provided on one side of the overlapping portion of both brackets 18, and a fastener 20 for fixing the left and right short rods 7a in a horizontal straight line is provided on the other side of the overlapping portion. Both the folding pivot pin 19 and the fastener 20 use bolts and nuts, and both brackets 18 can be connected and separated.

[0015] The left and right short rods 7a are provided with a connecting member 17 protruding downward at the outer end located outside in the left-right direction from the pivot shaft 11 in the deployed posture for passing through the connecting pin 13, and an isolating member 21 protruding upward is provided on the side opposite to this connecting member 17. The isolation member 21 has a protruding amount from the short bar 7a that is substantially the same as the protruding amount from the short bar 7a to the folding pivot pin 19. When the left and right short bars 7a are folded about the folding pivot pin 19, the isolation members 21 come into contact with each other, bringing the left and right short bars 7a into a parallel posture away from each other.

[0016] When the scaffolding base 1 is in the deployed posture for work, the left and right short bars 7a of the cross beam member 7 are fixed in a horizontal straight line by the pivot pin 19 and the fastener 20, and are pivotally supported inside the left and right of the leg post 8 by the pivot shaft 11 and the pivot shaft through bracket 16, and are connected to the upper end of the inclined member 12 outside the left and right of the leg post 8 by the connecting pin 13 and the connecting member 17. In the deployed posture, since the pivot shaft 11 and the connecting pin 13 are located with the leg post 8 in between, the distance between the two can be made large. Also, since a tensile force rather than a compressive force is applied to the inclined member 12, sufficient support strength can be obtained for the load applied to the center in the left - right direction of the cross beam member 7.

[0017] When the scaffolding base 1 releases the fastener 20 and engages and connects the upper end of the inclined member 12 to the scaffold board engaging member 9 instead of the connecting pin 13, the left and right short bars 7a of the cross beam member 7 are folded about the pivot pin 19, and at the same time, they are also folded about the pivot shaft 11 with respect to the leg frame 6. As shown in FIG. 8, the isolation members 21 come into contact with each other, and the left and right leg posts 8 and the left and right short bars 7a are separated from each other but are folded into a parallel posture.

[0018] Note that when the folding pivot pin 19 is removed from the scaffolding base 1 in the folded state, the left and right leg frames 6 can be separated from each other to the left and right. In FIGS. 1 - 7, 11, and 12, the scaffold board 3 closes the space surrounded by the left and right scaffold board engaging members 9 of the scaffolding base 1 and the front and rear cross beam members 7 to form a scaffold. It has a plurality of fitting hooks 32 at both left and right ends, and these fitting hooks 32 are detachably fitted to the scaffold board engaging members 9 and are placed on the scaffolding base 1.

[0019] The scaffold board 3 is composed of two sets of board materials. Each board material connects the opposing end portions of the left and right short boards 3a with a folding pivot pin 31, provides a fitting hook 32 at the outer end portion of the left and right short boards 3a for fitting with the scaffold board engaging member 9, provides a width direction reinforcing member 33 on the lower surface of each of the left and right short boards 3a, and provides a brace 34 connected to the width direction reinforcing member 33 and the intermediate horizontal member 10 of the leg frame 6.

[0020] The brace 34 has hook engaging portions at both ends and is detachably engaged with the width direction reinforcing member 33 and the intermediate horizontal member 10 of the leg frame 6. This brace 34 is stored between the two boards when the left and right short boards 3a are folded. When the scaffold board 3 is installed on the scaffold stand 1 in the deployed posture, a width timber 36 is arranged on the front and rear edges of the scaffold board 3. This width timber 36 corresponds to the left and right short boards 3a, is formed of an L-shaped cross-section profile, and is provided with a hanging portion 36a that engages with the short rods 7a of the front and rear cross beam members 7.

[0021] The handrail frame 4 placed on the upright posts 8 of the leg frame 6 has a post 41 connected in a rising manner to the connecting portions 8a at the upper ends of the front, rear, left, and right upright posts 8, a vertical handrail member 42 installed between the front and rear posts 41, and a telescopic and disassemblable horizontal handrail member 43 installed between the left and right posts 41. The post 41 uses a pipe material with a cross-sectional shape similar to that of the upright post 8, such as a front-rear circular shape, circular shape, or rectangular shape, and a substantially U-shaped hook engaging member 46 is fixed to its upper part and intermediate part. The central part of this substantially U-shaped hook engaging member 46 engages with the end hook 42a of the vertical handrail member 42, and the upper part of the substantially U-shaped hook engaging member 46 engages with the end hook 43a of the horizontal handrail member 43.

[0022] The vertical handrail member 42 has end hooks 42a fixed to both ends of the angle material. The front and rear horizontal handrail members 43 insert angle materials 43c into both sides of the central angle pipe 43b in a telescopic manner and fix them with stoppers 43d at the deployed positions, and end hooks 43a are provided at the outer ends of the respective angle materials 43c. The folding frame 4 can be assembled by engaging the longitudinal folding member 42 and the transverse folding member 43 in two upper and lower stages with respect to the four posts 41. The longitudinal folding member 42 and the transverse folding member 43 are detachable, and the transverse folding member 43 can be further extended, contracted, and disassembled.

[0023] The scaffold stand 1 of the above-described embodiment connects the upper parts of the pair of left and right leg frames 6 with a pair of front and rear cross beams 7 that can be folded from the deployed horizontal posture. Each of the left and right leg frames 6 is connected by a pair of front and rear leg columns 8 with an upper scaffold board engaging member 9 and a plurality of intermediate horizontal members 10. Each of the front and rear cross beams 7 is pivotally supported on the upper part of the leg column 8 via a pivot shaft 11, and the cross beam 7 in the horizontal posture and the leg frame 6 are connected by an inclined member 12. The cross beam 7 is pivotally supported on the upper part of the leg column 8 via a pivot shaft 11 inside from the outer end in the horizontal posture. The inclined member 12 is arranged on the opposing surface side of each of the front and rear leg columns 8, the upper end is connected to the outer end of the cross beam 7 in the horizontal posture via a connecting pin 13, and the lower end is connected to the intermediate horizontal member 10.

[0024] Thereby, the support strength of the inclined member 12 that supports the cross beam 7 in the horizontal posture can be increased, and the connection strength between the leg column 8, the cross beam 7, and the inclined member 12 can be increased. In the scaffold stand 1 of the above-described embodiment, each of the leg columns 8 is provided with a bracket 16 for passing through the pivot shaft that protrudes in the left and right opposing directions at the upper part. At the outer end of the cross beam 7 in the horizontal posture, a connecting member 17 for passing through the connecting pin that protrudes downward is provided. The upper end of the inclined member 12 can be connected to the scaffold board engaging member 9 instead of the outer end of the cross beam 7.

[0025] Thereby, the distance from the pivot shaft 11 to the connecting pin 13 of the cross beam 7 in the horizontal posture can be made large. In the folded state of the scaffold stand 1, the bracket 16 for passing through the pivot shaft and the connecting member 17 for passing through the connecting pin can be structured so as not to protrude from the left and right leg frames 6, and the storage of the inclined member 12 can also be good. In the scaffold stand 1 of the above-described embodiment, for each of the front and rear cross beam members 7, brackets 18 that partially overlap each other are attached to the opposing end portions of the left and right short rods 7a. A folding pivot pin 19 is provided on one side of the overlapping portion of both brackets 18, and a fastener 20 for fixing the left and right short rods 7a in a horizontally straight line is provided on the other side of the overlapping portion. At the outer end portions of the left and right short rods 7a, a separating member 21 is provided that positions the left and right short rods 7a in a parallel posture separated from each other when folded about the folding pivot pin 19.

[0026] As a result, the cross beam member 7 can be formed into a single strong rod when the left and right short rods 7a are deployed, and can be arranged in parallel while being separated from each other and from the left and right leg posts 8 when folded. In the scaffold stand 1 of the above-described embodiment, the a pair of scaffold board 3 is installed between the scaffold board engaging members 9 of the left and right leg frames 6. The scaffold board 3 has opposing end portions of the left and right short boards 3a connected by a folding pivot pin 31, and fitting hooks 32 that fit to the scaffold board engaging members 9 are provided at the outer end portions of the left and right short boards 3a. Width direction reinforcing members 33 are provided on the lower surfaces of the left and right short boards 3a, and braces 34 that are connected to the width direction reinforcing members 33 and the intermediate horizontal members 10 of the leg frames 6 are provided.

[0027] As a result, the foldable scaffold board 3 can be stably installed on the left and right leg frames 6. In the scaffold stand 1 of the above-described embodiment, the a pair of handrail frame 4 is installed on the left and right leg frames 6. The handrail frame 4 includes posts 41 that are connected in a rising manner to the upper ends of the front, rear, left, and right leg posts 8, vertical handrail members 42 that are installed between the front and rear posts, and a telescopic horizontal handrail member 43 that is installed between the left and right posts 41. Hook engaging members 46 that can simultaneously engage with the end hooks 42a of the vertical handrail member 42 and the end hooks 43a of the horizontal handrail member 43 are provided on the posts 41.

[0028] As a result, the assemblable handrail frame 4 can be stably placed on the leg posts 8 of the leg frames 6. Note that the present invention is not limited to the above-described embodiment, and the shape, configuration, combination, etc. of the members can also be changed. For example, the scaffolding stand 1 may be provided with a ground contact cushioning material instead of the caster wheels 51, or the leg posts 8 and the caster wheels 51 may be made telescopically adjustable.

[0029] The scaffolding platform device A may be composed of the scaffolding stand 1 and the scaffolding board 3, or the scaffolding board 3 may be composed of a single board.

Explanation of Reference Numerals

[0030] 1 Scaffolding stand 3 Scaffolding board 3a Short board 4 Handrail frame 6 Leg frame 7 Cross beam member 7a Short rod 8 Leg post 8a Connecting part 9 Scaffolding board engaging member 10 Intermediate horizontal member 11 Pivot shaft 12 Inclined member 13 Connecting pin 16 Bracket for passing through the pivot shaft 17 Connecting member for passing through the connecting pin 18 Bracket 19 Pivot pin 20 Fastener 21 Spacer member 31 Pivot pin for folding 32 Fitting hook 33 Width direction reinforcing member 34 Brace 36 Width wood 36a Engaging part 41 Post 42 Vertical handrail member 42a End hook 43 Horizontal handrail member 43a End hook 43b Central angle pipe 43c Angle material 43d Stopper 46 Hook engaging member 51 Caster wheel A Scaffolding platform device

Claims

1. A scaffolding stand in which the upper parts of a pair of left and right leg frames (6) are connected by a pair of front and rear cross beams (7) that can be folded from a deployed horizontal position. Each of the left and right leg frames (6) is connected by a pair of front and rear leg columns (8), an upper scaffold board engaging member (9), and a plurality of intermediate horizontal members (10). Each of the front and rear cross beams (7) is pivotally supported on the upper part of the leg column (8) via a pivot shaft (11), and the cross beam (7) in the horizontal position and the leg frame (6) are connected by an inclined member (12), The cross beam (7) is pivotally supported on the upper part of the leg column (8) via a pivot shaft (11) inside from the outer end in the horizontal position, The inclined member (12) is arranged on the opposing surface side of each of the front and rear leg columns (8). The upper end is connected to the outer end of the cross beam (7) in the horizontal position via a connecting pin (13), and the lower end is connected to the intermediate horizontal member (10). Each of the leg columns (8) is provided with a pivot shaft through-bracket (16) protruding in the left and right opposing directions at the upper part, At the outer end of the cross beam (7) in the horizontal position, a connecting member (17) for passing through the connecting pin protruding downward is provided, A scaffolding stand, characterized in that the upper end of the inclined member (12) can be connected to the scaffold board engaging member (9) instead of the outer end of the cross beam (7).

2. Each of the front and rear cross beams (7) has brackets (18) with partially overlapping portions attached to the opposing ends of the left and right short bars (7a). A folding pivot pin (19) is provided on one side of the overlapping portion of both brackets (18), and a fastener (20) for fixing the left and right short bars (7a) in a horizontally straight line is provided on the other side of the overlapping portion. The scaffolding stand according to Claim 1, characterized in that at the outer end portions of the left and right short bars (7a), a separating member (21) is provided to keep the left and right short bars (7a) in a parallel position away from each other when folded around the folding pivot pin (19).

3. A scaffold board (3) is installed between the scaffold board engaging members (9) of the pair of left and right leg frames (6), The scaffold board (3) has the opposing ends of the left and right short boards (3a) connected by a folding pivot pin (31), fitting hooks (32) for fitting to the scaffold board engaging member (9) are provided at the outer end portions of the left and right short boards (3a), width direction reinforcing members (33) are provided on the lower surfaces of the left and right short boards (3a), and braces (34) connected to the width direction reinforcing members (33) and the intermediate horizontal members (10) of the leg frame (6) are provided. The scaffolding stand according to Claim 1 or 2, characterized in that.

4. A handrail frame (4) is installed on the pair of left and right leg frames (6), The handrail frame (4) has posts (41) that are connected in a rising manner to the upper ends of the front, rear, left, and right leg posts (8), vertical handrail members (42) installed between the front and rear posts, and a telescopic horizontal handrail member (43) installed between the left and right posts (41). The scaffold stand according to any one of claims 1 to 3, characterized in that the post (41) is provided with a hook engaging member (46) capable of simultaneously engaging an end hook (42a) of the vertical handrail member (42) and an end hook (43a) of the horizontal handrail member (43).

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