JP2011052474A - Foldable working scaffold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foldable working scaffold which has scaffolding boards divided into sections and is excellent in workability when the scaffold is set and removed. <P>SOLUTION: Each leg column 5 of a pair of leg bodies 2a, 2b arranged oppositely to each other is connected with a telescopic pantograph-shaped brace 3, and an intermediate support 15 is provided substantially at the center in the telescopic direction of the brace 3. Scaffolding boards 4a, 4b divided into two sections substantially at the center in the longitudinal direction are arranged between respective leg bodies 2a, 2b, and the base ends of these scaffolding boards 4a, 4b are axially fitted to the upper ends of the respective intermediate supports 15 to be foldable into a mountain-fold form. When the working scaffold 1 is set, the respective horizontally developed scaffolding boards 4a, 4b have their free end side supported with the upper ends of the respective leg bodies 2a, 2b when the brace 3 is extended. When the working scaffold 1 is removed, the respective leg bodies 2a, 2b approached to each other by shrinking the brace 3 are held from both sides between the respective scaffolding boards 4a, 4b foldable into the mountain-fold form for storage. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a foldable work scaffold used in interior work or a small-scale construction site.

  2. Description of the Related Art Conventionally, folding work scaffolds that are easy to install and remove and excellent in transportation and storage are widely used in interior construction and small-scale construction sites. This foldable work scaffold has, for example, two leg columns provided with a caster for movement at the lower end portion, and these leg columns are connected with a horizontal member to form a frame-shaped leg body. In addition, a pair of these legs are arranged opposite to each other, and the pillars of each leg are connected to each other by elastic pantograph-like braces, and the pantograph-like braces are expanded at the time of installation. While a scaffolding plate is installed between horizontal members to make a working scaffold, at the time of removal, after removing the constructed scaffolding plate, the pantograph-like braces can be folded and stored compactly. Those shown in Documents 1 to 3 are known.

  Further, the applicant has already filed a similar foldable work scaffold (Patent Document 4), and in the foldable work scaffold according to the present invention, the scaffold plate erected on the work scaffold is substantially at the center in the longitudinal direction. And the base end of each scaffold plate is pivotally attached to the upper end of each of the left and right legs, and each scaffold plate supported horizontally when the work scaffold is removed is the base end. It is designed to be pivoted around the base and suspended so as to follow each leg, and the bulk space at the time of storage is relatively compact compared to the conventional method shown in Patent Documents 1 to 3 above. It is configured to be suppressed.

Japanese Utility Model Publication No. 3-14516 Japanese Utility Model Publication No.4-1244 Japanese Utility Model Publication No. 6-36166 JP 2009-121100 A

  However, in the foldable work scaffold described in Patent Document 4, when the scaffold plates are rotated when the work scaffold is installed or removed, the free end side of each scaffold plate is swung up more greatly than the upper end of the leg body. Therefore, it is not very workable for workers who work while stretching their hands while staying on the floor. When a relatively high type of leg is used, there may be a situation where it is difficult for the worker's hand to reach sufficiently, and there is a concern that work efficiency and work safety may be reduced.

  In view of the above points, an object of the present invention is to provide a foldable work scaffold that is excellent in work efficiency and work safety when a scaffold is installed or removed in a foldable work scaffold in which a scaffold plate is divided.

  In order to solve the above-described problems, in the folding work scaffold according to the present invention, two leg columns each having a caster at the lower end are connected by a horizontal member to form a leg, and the leg is A collapsible working scaffold constructed by connecting a pair of opposing pedestal pillars with stretchable pantograph-like braces, and laying a scaffolding plate between the legs, the stretching direction of the braces The scaffolding plate is divided into two at the substantially central portion in the longitudinal direction, and the base end portion of each scaffolding plate is pivotally attached to the upper end portion of the intermediate strut. It is configured to be foldable, and when the work platform is installed, the free end side of each scaffold plate that is horizontally deployed is supported by the upper end of each leg when bracing and extended, while the bracing is contracted and close when the work scaffold is removed From each side on each scaffolding plate that can be folded in a mountain fold each leg It is characterized in that it has to be housed in crowded look.

  According to the foldable work scaffold according to the present invention, two leg posts each having a caster at the lower end are connected by a horizontal member to form a leg, and a pair of the leg is arranged to face each leg. It is a foldable work scaffold in which legs of the body are connected by stretchable pantograph-like braces, and a scaffolding plate is laid between the legs, with an intermediate strut at a substantially central part in the stretch direction of the braces The scaffold plate is divided into two at the substantially central portion in the longitudinal direction, and the base end portion of each of the scaffold plates is pivotally attached to the upper end portion of the intermediate strut so that it can be folded into a mountain fold. When the work platform is installed, the free end side of each scaffold plate that is horizontally deployed is supported by the upper end of each leg when bracing and extended, while when the work platform is removed, the braces that are close together by contracting the brace are piled up. To be sandwiched and stored from both sides with each scaffolding plate folded Therefore, when setting up or removing the work platform, each scaffold plate can be rotated in a relatively low range below the upper end of the leg, and work can be done by extending the hand while on the floor. Workers can easily perform work with sufficient margins, and work efficiency and work safety can be expected to improve.

It is a front view which shows one Example of the folding type work scaffold which concerns on this invention. It is a top view of FIG. It is a side view of FIG. It is a figure equivalent to Drawing 1 showing the state where a work scaffold was folded up. It is a figure explaining folding and unfolding operation of a work scaffold.

  According to the foldable work scaffold according to the present invention, the scaffolding plate provided between the legs is provided with an intermediate support in the substantially central portion in the expansion and contraction direction of the pantograph-like braces that connect the pair of opposingly arranged legs. The base plate is divided into two parts at a substantially central portion in the longitudinal direction, and the base end portions of the respective scaffold plates are respectively pivotally attached to the upper end portions of the intermediate struts so as to be foldable into mountain folds.

  And when installing the work scaffold, after each scaffold plate is deployed horizontally, each leg is pulled apart to a predetermined interval while expanding the pantograph-like braces, and each of the legs deployed horizontally at the upper end of each leg Complete the installation work by supporting the free end of the scaffolding plate. On the other hand, when the work scaffold is removed, each leg is brought close to each other while contracting the braces, and each horizontally deployed scaffold plate is folded in a mountain fold so that the legs placed close together are stored between both sides. Complete removal work.

  At this time, each scaffold plate is always configured to rotate in a relatively low range lower than the vicinity of the upper end of the leg regardless of whether it is unfolded or folded. Even if a worker who works by extending it can work easily with sufficient margin, even if a leg of a type with a relatively high height to the upper end of the leg is used for work at high places Work can be installed and removed efficiently and safely.

  As described above, the folding work scaffold is divided into two parts at the substantially central part in the longitudinal direction of the scaffolding plate laid between the legs, and is folded and stored in the mountain fold around the central part. In addition to being able to suppress the bulk space when folded, it is excellent in transportability and storage, and the work height during installation or removal work can be kept low, so that improvement in work efficiency and work safety can be expected.

  Embodiments of the present invention will be described below with reference to the drawings.

  Reference numeral 1 denotes a foldable working scaffold according to the present invention, which is installed between a pair of opposing legs 2a, 2b, a stretchable pantograph-like brace 3 connecting them, and each leg 2a, 2b. The main body is composed of scaffold plates 4a and 4b which are divided into two at the substantially central portion in the longitudinal direction.

  The legs 2a and 2b are formed in a frame shape by standing two leg posts 5 in parallel and connecting these leg posts 5 with a plurality of horizontal members 6. The pedestal 5 is composed of an outer tube 7 and an inner tube 8 slidably fitted into the inner tube 8 from below, as shown by an arrow A in FIG. The height of the legs 2a and 2b can be adjusted by fixing the outer tube 7 with a fixing pin or the like at an appropriate height position. In addition, a locking piece 9 having a round hole is provided on the lower side of the outer tube 7 and extends from the middle portion of the outer tube 7 to the upper side along the longitudinal direction of the outer tube 7. On the other hand, a guide piece 11 having a long hole 10 of an appropriate length is provided so as to protrude, and a lower caster 12 is provided with a caster 12 for movement.

  The brace 3 is a pantograph-like shape that can be expanded and contracted by intersecting a large number of link members 13 with each other and pivotally connecting and connecting with connecting pins. A sliding pin 14 having a diameter slightly smaller than the groove width of the long hole 10 of the guide piece 11 is fixed to the end of the material 13, while the end of the link piece 13 on the lower side has a round shape of the locking piece 9. A pin hole having substantially the same diameter as the hole is formed.

  Then, the brace 3 is arranged between the leg pillars 5 of the pair of opposing legs 2a, 2b, and the connecting pin is inserted with the pin hole at the end of the brace 3 aligned with the round hole position of the locking piece 9. On the other hand, the sliding pin 14 at the end of the brace 3 is fitted into the long hole 10 of the guide piece 11 while being axially attached. With this configuration, as shown by the arrow B in FIG. 5C, the sliding pin 14 moves in the elongated hole 10 in accordance with the movement of the legs 2a and 2b away from or close to each other. It slides and the brace 3 can be expanded and contracted.

  The struts 3 are each provided with an intermediate strut 15 at a substantially central portion in the expansion / contraction direction, and a horizontal member 16 is erected and connected to the upper ends of the pair of intermediate struts 15. The intermediate strut 15 is composed of an outer tube 17 and an inner tube 18 slidably fitted into the inner tube 18 from below. The lower end of the inner tube 18 is attached to the lower side connecting portion of the brace 3 by a connecting pin. On the other hand, the intermediate portion of the outer tube 17 is pivotally attached to the upper connecting portion of the brace 3 by a connecting pin, and as shown by the arrow C in FIG. Thus, the intermediate strut 15 extends and contracts in the vertical direction so that the expansion and contraction of the brace 3 is not hindered.

  Scaffolding plates 4a and 4b constructed between the legs 2a and 2b are divided into two at substantially the center in the longitudinal direction, and the length of each of the scaffolding plates 4a and 4b is when the bracing 3 is fully expanded. The distance between the legs 2a and 2b is approximately half the length, and the proximal end portions of the scaffolding plates 4a and 4b are axially supported by the shaft body 19 near the upper end portion of the intermediate strut 15 respectively. As shown by an arrow D in FIG. 5C, it is configured to be foldable in a mountain fold with the upper end portion of the intermediate strut 15 as the center.

  When the scaffold is installed, the scaffold plates 4a and 4b are horizontally deployed as shown in FIGS. 1 to 3, and the free ends of the scaffold plates 4a and 4b are straddled to each leg when the brace 3 is expanded. While being supported at the upper ends of 2a and 2b, when the scaffold is removed, the scaffold plates 4a and 4b are folded into mountain folds as shown in FIG. Each leg 2a, 2b is sandwiched and stored from both sides.

  In addition, a plurality of through holes 20 are formed in the upper corners of the scaffold plates 4a and 4b, and upper ends of the legs 2a and 2b which are lower than the through holes 20 when the scaffold plates 4a and 4b are deployed. Is provided with a support tube 21 for standing the handrail material, and when the scaffold is installed, the lower end portion of the handrail material is fitted into the support tube 21 through the through hole 20 as necessary, thereby the scaffold plate 4a, A handrail material (not shown) can be erected around 4b.

  Further, the brace 3 and the pedestal 5 are connected to each other by a steadying member 22, which is composed of an outer tube 23 and an inner tube 24 that is slidably fitted in the inner tube 24. It can be adjusted.

  When the work scaffold 1 having the above-described configuration is installed at the work site, the work proceeds in the order of (d) → (c) → (b) → (a) in FIG. First, the scaffold plates 4a and 4b located on both sides of the folded working scaffold 1 are rotated so that the free end side is lifted upward with the base end portion as the center. 4b is developed horizontally. Subsequently, the legs 2a and 2b are pulled apart to the left and right while the pantograph-like brace 3 is expanded, and the free ends of the scaffolding plates 4a and 4b that are horizontally deployed in a state where the predetermined intervals have been separated are attached to the legs. It is supported at the upper ends of the bodies 2a and 2b and fixed with fixing pins or the like. Then, the height of the legs 2a, 2b is appropriately adjusted according to the height of the work site, and handrails (not shown) are attached around the scaffolding plates 4a, 4b as necessary to complete the installation work. .

  On the other hand, when the work scaffold 1 is removed from the site, the work proceeds in the order of (a) → (b) → (c) → (d) in FIG. First, the handrail material is removed from the work scaffold 1 in the installed state, and the height of the legs 2a and 2b is lowered to the lowest position. Subsequently, after the fixing of the scaffold plates 4a, 4b and the legs 2a, 2b is released, the legs 2a, 2b are brought close to each other while the pantograph-like bracing 3 is contracted, and the horizontally deployed scaffold plate 4a 4b is folded in a mountain fold, and the legs 2a and 2b which are brought close to each other are stored compactly so as to be sandwiched from both sides, and finally fixed with a restraining fixing pin or the like to complete the removal operation.

  At this time, as can be seen from FIG. 5, the scaffold plates 4a and 4b always rotate within a relatively low range lower than the upper ends of the legs 2a and 2b, regardless of whether they are unfolded or folded. Because it is configured to be operated, it is possible to carry out the work with sufficient margins for workers who perform the above work by extending their hands while staying on the floor, and the work scaffold 1 can be installed and removed efficiently and safely. Can be implemented.

  As described above, the foldable work scaffold is divided into two at the substantially central portion in the longitudinal direction, and is configured to be foldable into mountain folds around the central portion, so that the bulk space at the time of folding is suppressed and transportability and storage are possible. In addition, the work height at the time of installation / removal work can be kept low enough to allow the worker to perform work with a margin, and improvement in work efficiency and work safety can be expected.

  In addition, the pantograph-like brace 3 is contracted to bring the legs 2a and 2b close to each other, and the legs 2a and 2b are sandwiched from both sides by the two scaffold plates 4a and 4b that are folded in a mountain fold. Since, for example, during installation work, as soon as the restraint of each leg 2a, 2b is released, the pantograph-like brace 3 expands without permission and each leg 2a, 2b vigorously expands to the left and right Such an unexpected situation can be reliably avoided by the two scaffold plates 4a and 4b arranged on the left and right sides, which is advantageous in terms of work safety.

DESCRIPTION OF SYMBOLS 1 ... Folding-type work scaffold 2a, 2b ... Leg 3 ... Bracing 4a, 4b ... Scaffolding board 5 ... Leg pillar 6 ... Horizontal member 12 ... Caster 15 ... Intermediate support 19 ... Intermediate support

Claims (1)

  Two legs with casters at the lower end are connected by a horizontal member to form a leg, and a pair of the legs are arranged opposite to each other so that the legs of each leg can be expanded and contracted in a pantograph shape. A foldable working scaffold that is connected by bracing and has a scaffolding plate laid between the legs, comprising an intermediate post at a substantially central portion in the stretching direction of the bracing, and the scaffolding plate is substantially in the longitudinal direction. Each scaffold plate is divided into two at the center, and the base end of each scaffold plate is pivotally attached to the upper end of the intermediate strut so that it can be folded in a mountain fold. The free end side of the arm is supported by the upper end of each leg during expansion, and when the work platform is removed, the legs that are close together by contracting the brace are sandwiched from both sides by each scaffold plate that is folded in a mountain fold. A foldable work scaffold characterized by being housed in.

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