JP2018009335A - Ladder device for construction and its supporting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install a construction ladder device away from a handrail of a building for movement between a floor of a temporary scaffold and a floor such as a veranda of a building, and to easily install the ladder device at the end of daily work. It should be collected and easily re-installed at the start of work. A ladder device (1) is rotatably supported by a tread plate portion (2) that is detachably attached to a steel tread plate (N) of a temporary scaffold (C) and a tread plate portion, and is in an upright position during use. It has a clue rod (3) fixed to and a length-adjustable ladder portion (4) rotatably supported by the tread plate portion. The ladder portion can be grounded to the floor (F) of the balcony (B) when in use, and can rotate upward when not in use and retract to the outdoor side of the balcony. Further, the ladder portion may be attached to the tread plate portion so as to be vertically movable, and the ladder portion may be configured to be retracted to the upper area of the veranda when not in use. [Selection diagram] Fig. 1

Description

  The present invention relates to a ladder device for construction and a method for supporting the ladder device, and more specifically, for an operator to move up and down between a temporary scaffolding and a veranda of a building in a renovation work of an apartment house. The present invention relates to a ladder device for construction installed on a veranda of a building and a supporting method thereof.

  In general, on a veranda or balcony of an apartment house or the like, a simple boundary wall is disposed at a boundary between adjacent doors or between adjacent rooms. The boundary wall is usually arranged on an extension of the boundary wall between the dwelling units, and the veranda area is divided into individual dwelling units or rooms for ensuring privacy. Such boundary walls are called by various names such as partition plates, kicking doors, partition walls, partition plates, doors, etc. In order to form, it has a structure in which a resident or the like can easily evacuate to a veranda in an adjacent door or an adjacent room by breaking or opening a wall. For example, the boundary wall functions as a simple door boundary wall that divides the veranda area of each dwelling unit from the veranda area of the adjacent door in normal times, but has a strength or strength that can be kicked or destroyed by relatively small human power. Designed with plates, the veranda can be used as a continuous evacuation passage that spans multiple dwelling units by breaking or opening walls in the event of an emergency such as a fire.

  In general, for large-scale renovation work of apartment buildings, temporary scaffolds for construction are installed in the outer periphery of the building. When repairing the floor / wall of the veranda or balcony, waterproofing, painting, etc., the veranda area of each dwelling unit or household is divided by the boundary wall. In order to move between them, it is necessary to return to the temporary scaffold each time and move to the veranda of the adjacent door through the work passage of the temporary scaffold. For such movement between adjacent verandas, workers install a stepladder or ladder for raising and lowering between the scaffold and the veranda and move up and down between the scaffold and the veranda. Due to instability and the labor, time, and annoyance of installing a stepladder or ladder for each veranda of each dwelling unit, jump to the veranda without using a stepladder or ladder, or climb on a scaffold using a handrail on the veranda Such an act occurs as the actual state of work. However, when an operator climbs a scaffold using a handrail, the handrail may be damaged, deformed or damaged, and the handrail may be soiled or scratched. Even if it considers, the form of such a raising / lowering movement is undesirable.

  A registered utility model publication No. 31888928 describes a ladder device that can be installed on a veranda relatively easily for movement between a temporary scaffold and a veranda. This ladder device is composed of a ladder portion whose legs can be grounded on the floor of the veranda, a step board portion that can be placed on the headboard of the handrail of the veranda, and a fixing means for fixing the step board portion to the headboard. Since the ladder apparatus has a two-point support form in which the upper part and the lower part are supported by a headboard and a floor, a relatively stable lifting movement path is formed.

  Also known is a ladder device for construction in which a single pipe for supporting a ladder is installed horizontally on a temporary scaffold, and the stepping plate part of the ladder or the scaffold side end of the girders is fastened to the single pipe by a clamp member. Yes. This ladder device has a support form in which the ladder is supported at two points by the pipe material constituting the framework of the temporary scaffold and the floor of the veranda.

Registered Utility Model Publication No. 318828

  However, metal handrails such as aluminum alloy handrails and stainless alloy handrails are widely used as handrails for verandas in apartment buildings, etc., and this type of handrail generally has strength to withstand the loads of ladders and workers. I don't have it. For this reason, when the above ladder device for supporting the step board portion of the ladder by the handrail of the veranda is used, a relatively large load acts on the handrail of the veranda when the operator moves up and down, and the handrail is bent or locally deformed, or the step board There is concern about the damage of the handrail of the handrail that comes into contact with the portion.

  Moreover, even when such a ladder device is assumed to be used for a handrail of a reinforced concrete structure, there is a high possibility that traces or scars will remain on the handrail portion of the handrail that has come into contact with the treads etc., and that repair is required. Problems are likely to arise. For this reason, it is desirable to adopt a ladder device structure in which the load of the ladder device or a load does not act on the handrail of the building.

  On the other hand, the ladder device having the above structure in which the upper part or the end portion on the side of the scaffold is fastened to the framework of the temporary scaffold by the clamp member, and the ladder is supported by the framework of the temporary scaffold and the floor of the veranda, This is advantageous in that it is not imposed. However, if it is assumed that this type of ladder device will be used in renovation work for apartment buildings, etc., if the work schedule for the renovation work will be several days or weeks, the ladder device will be removed and collected at the end of the daily work. Therefore, it is considered that the ladder device needs to be re-installed at the start of work on the next day. This is because if the ladder device is left usable in a time zone other than the working time zone, residents may move up and down the ladder device at night or in the early morning, which may cause some problem.

  However, the conventional ladder device that fastens the upper end portion or the end portion on the side of the scaffold to the framework of the temporary scaffold has a relatively high rigidity structure, so that the bulk and the weight are relatively large. Therefore, at the end of daily work, It is not suitable for removing and collecting the ladder device and re-installing the ladder device at the start of the next day's work. That is, it is extremely difficult in practice to easily remove and collect this type of ladder device at the end of daily work and to re-install it at the start of daily work. This would be a significant work burden for workers and the like.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a construction ladder apparatus that is installed for movement between a floor of a temporary scaffold and a veranda of a building. The construction ladder apparatus has a structure that does not impose a load or load on the handrail while being separated from the handrail of the building, and that can be easily recovered at the end of daily work and can be easily reinstalled at the start of work. There is.

  The present invention also provides a supporting method for supporting a construction ladder device for movement between a floor of a temporary scaffold and a veranda of a building, and places a load or a load on the handrail apart from the handrail of the building. Furthermore, it is an object of the present invention to provide a method for supporting a construction ladder apparatus that can be easily collected at the end of daily work and can be easily reinstalled at the start of work.

In order to achieve the above-mentioned object, the present invention straddles the handrail or the standing part of the outer peripheral part of the building in order to move up and down between the floor of the temporary scaffold and the floor of the outdoor open space around the outer wall of the building. In the construction ladder equipment installed in
A planar substrate portion removably attached to a floor plate or floor slab of a temporary scaffold;
A ladder part that is pivotally or movably supported by the support shaft or support of the base plate part, and that can be adjusted in length so as to contact the floor of the outdoor open space when in use;
The ladder portion is pivoted or moved upward when not in use, and retreats to the outdoor side of the handrail or the standing portion or to the upper area of the floor. It is supported by the substrate part so as to be rotatable, or is supported by the support tool so as to be relatively movable or slidable in the vertical direction,
In order to use the horizontal upper surface of the floor plate or floor slab as a planar bearing body, the base plate portion includes a horizontal and planar supported surface that is in surface contact with the horizontal upper surface, and the supported surface is A construction ladder apparatus having a depth dimension equal to or greater than a depth dimension of the floor board or floor slab and having a width dimension equal to or greater than the width dimension of the ladder portion is provided.

  In addition, “outdoor open space around the outer wall of the building” is the space of the building that is open to the outside and is separated from the outdoor space or the outdoor environment by standing parts such as handrails and parapets. Means a veranda, balcony or rooftop of a building. Further, the “floor board or floor slab of the temporary scaffold” means a floor member such as a metal step board, a metal scaffold board, or a wooden scaffold board that constitutes a work floor such as a frame scaffold, a single pipe scaffold, or a wedge scaffold.

  According to the above-described configuration of the present invention, the ladder device has a ladder portion that contacts the floor such as a veranda, and the upper portion of the ladder portion that contacts the floor is supported by the substrate portion so as to be rotatable or movable. Therefore, the ladder device is separated from the handrail of the building and the load or load of the ladder device does not act on the handrail.

  In addition, since the board portion is in contact with the floor member of the temporary scaffold and is supported by the temporary scaffold, the load of the ladder device acting on the floor member of the temporary scaffold acts on the temporary scaffold as a local load. It is dispersed over a relatively large area and acts on the floor member of the temporary scaffold. For this reason, the floor member which comprises a temporary scaffold can support the load of a ladder apparatus effectively, without deform | transforming excessively by a local load.

  In addition, the ladder section can be rotated or moved upward when not in use and can be retracted to the outdoor side of the handrail or the standing section, or can be retracted to the upper area of the floor such as a veranda, so that daily work can be performed. The ladder part may be retracted to the outdoor side or upward at the end, and the ladder part may be rotated or moved indoors or downward at the start of work. Therefore, according to the ladder device configured as described above, the removal and re-installation work of the ladder device that may occur at the end of the daily work and at the start of the work can be omitted, which is extremely advantageous practically.

From another point of view, the present invention provides a method for supporting a construction ladder apparatus installed for movement between a floor of a temporary scaffold and a floor of an outdoor open space around an outer wall of a building.
Removably attaching a planar substrate portion having a horizontal and planar supported surface that contacts a horizontal upper surface of a floor plate or floor slab of a temporary scaffold to the floor plate or floor slab,
A planar support body for supporting the supported surface by setting the depth dimension and the width dimension of the supported surface to be larger than the depth dimension of the floor plate or slab and the width dimension of the ladder portion, respectively. Using the floorboard or floor slab as
A ladder part that contacts the floor of the outdoor open space is substantially horizontal so that the ladder part is rotated or moved upward when not in use and retracted to the outdoor side of the handrail or the standing part or to the upper area of the floor. The ladder part is supported by the support member of the board part which supports the ladder part so as to be rotatable by a support shaft of the board part having an axis, or supports the ladder part so as to be relatively movable in the vertical direction or slidable. A construction method for supporting a ladder apparatus for construction is provided.

  Preferably, the ladder device includes a handrail member such as a handhold bar supported by the substrate portion or the ladder portion, and the handrail member is supported and used by the substrate portion or the ladder portion so as to be rotatable or relatively movable. Sometimes it is held in a standing or standing position. More preferably, the board part, the ladder part, and the handrail member are configured to be able to turn the ladder part and the handrail member to a position parallel to the board part, and the ladder device is not used or removed. Sometimes it can be stored or stored very compactly. Preferably, the ladder part, the board part, and the handrail member are manufactured by relatively lightweight alloy parts (for example, aluminum alloy parts) with an emphasis on the portability of the ladder apparatus, and the weight of the ladder apparatus is 15 kg or less. Preferably, it is set to 12 kg or less.

  In a preferred embodiment of the present invention, the substrate portion has a form covering the upper surface and the side surface of the tread board or scaffolding plate, a fixing tool for pressing the side surface of the treading board or the scaffolding board, and the tread board on the opposite side of the fixing tool. Alternatively, a locking portion such as a locking claw that locks to the side edge of the scaffold plate is provided. The board portion is relatively displaced with respect to the tread board or the scaffold board by the pressing force of the fixture, and the locking part engages with the tread board or the scaffold board to prevent the board portion from being lifted or displaced upward. Preferably, the pressing tool is configured to press the side surface of the step board or the scaffold board with a tightening force such as an impact wrench.

  According to the construction ladder device of the present invention, the construction ladder device installed for movement between the floor of the temporary scaffolding and the veranda of the building, etc., is loaded on the handrail away from the handrail of the building. Alternatively, no load is imposed, and the ladder device can be easily recovered at the end of daily work and can be easily reinstalled at the start of the work.

  According to the method for supporting a construction ladder apparatus according to the present invention, the method for supporting a construction ladder apparatus for movement between a floor of a temporary scaffold and a veranda of a building, from a handrail of a building It is possible to separate and apply no load or load to the handrail, and to easily collect the ladder device at the end of the daily work and to easily reinstall the ladder device at the start of the work.

FIG. 1 is a side view showing an overall configuration and a usage pattern of a construction ladder apparatus according to a preferred embodiment of the present invention. 2A is a side view showing the structure of the ladder device shown in FIG. 1, and FIG. 2B is an enlarged cross-sectional view of the tread plate shown in FIG. 2A. FIG. 3 is a front view of the ladder device shown in FIGS. 1 and 2. 4A is a partial plan view of the ladder device shown in FIGS. 1 to 3, and FIG. 4B is a partially enlarged plan view of the tread plate portion. FIG. 5 is a cross-sectional view showing a mode in which the tread portion of the ladder device is attached to the steel tread of the temporary scaffold. FIG. 6 is a cross-sectional view and a side view showing a storage method and a storage form of the ladder device at the time of collection / removal. FIG. 7: is a side view which shows the whole structure and usage pattern of the construction ladder apparatus which concerns on other embodiment of this invention, and the process of collect | recovering / removing the ladder apparatus installed in the veranda is shown. FIG. 8 is a side view and a plan view of the ladder device shown in FIG. 7, and shows a recovery / removal process of the ladder device subsequent to the process shown in FIG. 7.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side view showing a configuration and a usage pattern of a construction ladder apparatus according to a preferred embodiment of the present invention.

  FIG. 1 shows a state where a temporary scaffold C for building work is installed on the outdoor side of a veranda B of a building A. The building A is, for example, an apartment house having a reinforced concrete structure, and the temporary scaffolding C is a frame scaffolding installed near the outer wall surface of the building A, for example, for large-scale repair work of an apartment house. The veranda B includes a metal handrail D and a boundary wall E. The floor F of the veranda B is a floor slab of a reinforced concrete structure of a cantilever type (cantilever) type extending outward from the outer wall portion G.

  The temporary scaffold C is a general-purpose framework scaffold having a configuration in which the building frame K, the steel tread M, and the like are assembled at a construction site or the like. The temporary scaffold C has a cantilever (cantilever) type expansion / contraction bracket J that protrudes from the building frame K toward the veranda B and supports the steel tread N. The bracket J supports the steel tread N at a height slightly above the handrail D.

  The top level (headwood top level) L1 of the handrail D installed on the veranda B is generally set at a height of about 1100 to 1150 mm from the floor surface of the veranda B. The steel tread board N is disposed at a level L2 slightly higher than the top end level L1 of the handrail D. The level difference of the level L1: L2 is preferably set within a range of 150 to 500 mm (for example, about 250 mm). FIG. 1 shows a configuration in which the steel tread N is arranged at a position slightly lower than the height of the steel tread M (shown on the veranda on the lower floor), and the steel tread N is the height of the steel tread M. A configuration (shown on the veranda on the upper floor) arranged at a position slightly higher than the vertical position is illustrated.

  The step board portion 2 of the ladder device 1 is attached to the steel tread board N and supported by the temporary scaffold 1. The ladder device 1 includes a cue bar 3 formed of a tube having a circular cross section that is vertically provided on the tread plate portion 2, and a ladder portion 4 that extends obliquely downward from the tread plate portion 2 and is grounded to the floor F at the ground contact portion 5. Have. The ladder device 1 is composed of an assembly of relatively lightweight metal parts integrally assembled with aluminum alloy parts. Preferably, the overall weight of the ladder device 1 is set to 10 to 15 kg, for example, 12 kg, so that an operator or the like can carry the ladder device 1 relatively easily, transport, move or relocate.

  The clasp bar 3 functions as a handrail member that an operator or the like grips or grasps with a finger when the ladder device 1 is raised or lowered. The tread portion 2 constitutes a planar substrate portion that is detachably attached to the steel tread N. As will be described later, in order to use the horizontal upper surface of the steel tread plate N as a planar support body, the tread plate portion 2 has a horizontal and planar supported surface that is in surface contact with the horizontal upper surface of the steel tread plate N. The supported surface has a depth dimension equal to or greater than the depth dimension of the steel tread plate N and a width dimension equal to or greater than the width dimension of the ladder portion 4.

  As described above, the tread portion 2 is supported by the steel tread N, and the grounding portion 5 of the ladder portion 4 is grounded on the upper surface of the floor F and supported by the floor F. The ladder device 1 is separated from the handrail D, and the weight of the ladder device 1 and the lifting load (the load of the person who moves up and down) do not act on the handrail D at all, and the weight and the lifting load of the ladder device 1 are made of steel. Supported by a tread board N and a floor F. Therefore, the ladder apparatus 1 is constructed between the temporary scaffold C and the floor F in a relatively stable support form.

  The upper end portion of the ladder portion 4 is pivotally supported by the horizontal support shaft 6 of the tread plate portion 2, and as shown by the arrow in FIG. 1, the ladder portion 4 rotates in the vertical direction around the horizontal axis line of the horizontal support shaft 6. 4 can be raised to a retracted position (indicated by a broken line in FIG. 1) when not in use. The tread plate portion 2 has a locking device or a mooring device (not shown) for locking or mooring the ladder portion 4 in the retracted position rotated by approximately 180 °.

  The cue bar 3 is also pivotally attached to the tread plate portion 2 by the horizontal support shaft 7 and rotates around the horizontal axis of the support shaft 7 as indicated by an arrow. Therefore, when the ladder device 1 is used, it can be erected at the vertical position shown in FIG. 1, and when the ladder device 1 is not used (after removal), the cue bar 3 can be tilted to the horizontal position.

  2, 3 and 4 are a side view, a front view and a plan view showing the structure of the ladder device, and FIGS. 2 and 4 include partially enlarged views. FIG. 5 is an enlarged cross-sectional view showing the relationship between the steel footboard of the temporary scaffold and the footboard portion of the ladder device.

  The structure of the ladder device 1 is specifically shown in FIGS. As shown in FIG. 2, the tread plate portion 2 is integrally assembled to the steel tread plate N by the fixture 8 and is integrated with the steel tread plate N so as to cover the upper surface and the side surface of the steel tread plate N. FIG. 5 shows a method of attaching the tread portion 2 to the steel tread N. As shown in FIG. 5A, the tread plate portion 2 includes a horizontal plate portion 20, a locking claw 21, a reinforcing member 22, and a fixture screwing portion 23. The fixture 8 includes an enlarged distal end portion 81 provided with an elastic body such as hard rubber that can come into contact with the side surface of the steel tread N, a screw portion 82 screwed into the screwing portion 23, an impact wrench, a torque wrench, or the like. And a head portion 83 that can be engaged with a tightening tool (not shown).

  When the ladder device 1 is installed on the temporary scaffold C, the horizontal plate portion 20 of the tread portion 2 is moved from the upper side of the steel tread N to the steel tread N as shown in FIGS. 5 (A) and 5 (B). It is mounted on the horizontal upper surface. The lower surface 20 a of the horizontal portion 20 is in contact with the upper surface of the steel tread N in a plane shape. As shown in FIG. 5B, when the fixture 8 is firmly tightened with a tightening tool such as an impact wrench and the steel tread N is pressed in the direction of the arrow P by the enlarged tip 81, the tread 2 will react (react). Force) is relatively displaced in the direction indicated by the arrow Q in FIG. 5B, and as a result, the locking claw 21 of the tread plate 2 is locked to the edge of the steel tread N. Thus, the tread portion 2 is integrally supported by the steel tread plate N by the fastening force of the fixture 8 and the engagement of the locking claw 21 and the steel tread plate N, and the lower surface 20a of the tread portion 2 is planar. The steel tread plate N constitutes a planar bearing body that supports the lower surface 20a of the tread plate portion 2 in a planar shape.

  As shown in FIGS. 3 and 4, bracket assemblies 25 and 26 are disposed at the left end portion and the right end portion of the tread plate portion 2, respectively. The bracket assembly 25 has a pair of left and right vertical upright plates 25 a: 25 b, and the upright plates 25 a: 25 b support the horizontal support shaft 6 for pivotally supporting the ladder portion 4. The bracket assembly 26 has a pair of left and right vertical upright plates 26 a: 26 b, and the upright plates 26 a: 26 b support the horizontal support shaft 7 for pivotally supporting the cue bar 3.

  As shown in FIG. 3, the ladder portion 4 has a pair of left and right telescopic columns (side girders) 40. A plurality of step bars (step boards, step boards) 41 are supported by the left and right support columns 40. The support column 40 and the walk bar 41 constitute a vertical tree and a cross bar of the ladder unit 4. The support column 40 is a telescopic support column having a square cross section and a double tube structure, and includes an outer tube 42 and an inner tube 43 that protrudes downward from the lower end portion of the outer tube 42. As described above, the upper end portion of the outer tube 42 is rotatably supported by the tread plate portion 2 by the horizontal support shaft 6. The inner tube 43 extends from the lower end of the outer tube 42 so that the grounding portion 5 is grounded to the floor F. The grounding portion 5 is covered with an elastic material such as rubber, resin, or elastomer, and is grounded to the floor F while maintaining appropriate elasticity. The extension amount Δh of the inner tube 43 is set to a maximum of about 450 mm, for example. The extension amount Δh can be adjusted, for example, in 20 steps by an expansion / contraction amount adjusting means (not shown). The expansion / contraction amount adjusting means is constituted by a known expansion / contraction adjusting mechanism that is generally employed in a support having a telescopic structure, and further detailed description thereof is omitted.

  2 to 4 show the width W1 and the depth S1 of the tread portion 2 and the depth S2 of the steel tread N. FIG. 3 and 4 show the width (the interval between the left and right support columns 40) W2 of the ladder portion 4 and the interval W3 between the left and right cue bars 3. The step board portion 2 has a depth S1 that is greater than or equal to the depth S2 of the floorboard or floor slab, and has a width W1 that is greater than or equal to the width W2 of the ladder portion 4 (more than the interval W3 of the clasp bar 3 in this embodiment). Since the lower surface 20a (FIG. 5) of the tread portion 2, that is, the supported surface of the ladder device 1 is supported on the upper surface of the steel tread N, that is, the supporting surface of the planar support body, with a relatively large area, the ladder The load of the device 1 does not act on the temporary scaffold C as a local load, but acts on the temporary scaffold C by being dispersed over a relatively large area. Therefore, the temporary scaffold C can effectively support the load of the ladder device 1 without being locally deformed by the local load.

  FIG. 6 is a cross-sectional view and a side view illustrating a mode in which the ladder device is stored when the ladder device 1 is collected (removed).

  As shown in FIGS. 6A and 6B, the cue bar 3 and the ladder portion 4 are rotated by the horizontal support shafts 6 and 7 until they are parallel to the upper surface of the horizontal plate portion 20, whereby FIG. As shown to C), the ladder apparatus 1 can be deform | transformed into the form which can be accommodated in a compact flat box form. As shown in FIG. 6C, the ladder device 1 having such a configuration can be stacked together with other ladder devices 1 (shown by broken lines), which is extremely advantageous in storage, storage, transportation, and the like.

  Next, a method for using the ladder device 1 will be described.

  A bracket J and a steel tread N shown in FIG. 1 are installed at an optimum position for raising and lowering the veranda B to be constructed. The operator or the like manually moves the ladder device 1 in a compact state to the installation position as shown in FIG. 6C, and places the tread portion 2 on the steel tread N as shown in FIG. Then, the fixture 8 is tightened, and thereby the tread portion 2 is fixed on the steel tread N. The operator or the like also raises the handle bar 3 in the vertical position as shown in FIG. 2 by the horizontal support shaft 7, and holds the locking pin 32 (FIG. 4B) in the holding portion 31 of the bracket assembly 26 and the handle bar 3. The clasp bar 3 is fixed to the standing position or the standing position by being inserted through the base portion 30 (FIG. 4B). The operator or the like further releases a locking pin or the like (not shown) that holds the ladder portion 4 in the storage position, rotates the ladder portion 4 by the horizontal support shaft 6, and moves the inner tube 43 from the outer tube 42. The extension amount Δh of the ladder part 4 is adjusted to extend, and the grounding part 5 is grounded to the floor F of the veranda B. Thus, as shown in FIGS. 1 and 2, a ladder for moving up and down is formed between the temporary scaffold C and the floor F, the upper part being supported by the steel tread N and the lower part being supported by the floor F. Note that the order of fixing the tread portion 2, turning the cue bar 3, and turning / extending the ladder portion 4 is not particularly limited, and may be performed in an appropriate procedure according to the surrounding situation.

  At the end of the work, the ladder device 1 may be removed in the reverse procedure of the initial installation. Specifically, the ladder portion 4 is rotated by the horizontal support shaft 6 and the inner tube 43 is drawn into the outer tube 42. The ladder device 1 is made shorter by shortening the overall length of the ladder portion 4, rotating the clasp bar 3 by the horizontal support shaft 7, releasing the fastening force of the fixture 8, and releasing the tread portion 2 from the steel tread N. It can be removed from the temporary scaffolding C. This procedure is also not particularly limited, and may be performed according to an appropriate procedure according to the surrounding situation.

  When the construction of the veranda B takes several days or weeks, the ladder device 1 is not removed after the daily work is completed, and the ladder portion 4 is rotated upward by the horizontal support shaft 6 as shown by a broken line in FIG. The ladder portion 4 may be rotated downward by the horizontal support shaft 6 when the next morning work starts, and the grounding portion 5 may be grounded to the floor F of the veranda B. When the ladder unit 4 is retracted and reinstalled, the overall length of the ladder unit 4 may be adjusted as appropriate in relation to the rotation of the ladder unit 4.

  As described above, the ladder device 1 configured as described above is detachably attached to the steel tread N of the temporary scaffolding C, and is rotatably supported on the tread tread 2, and is fixed in the standing position when in use. A cue bar 3 and a ladder part 4 that is pivotally supported by the tread board part 2 and is adjustable in length to be grounded to the floor F of the veranda B when in use. Sometimes it can be pivoted upward and retracted to the outdoor side of the veranda B.

  Since such a ladder device 1 is supported by the temporary scaffolding C and the floor F and is separated from the handrail D, the load or load of the ladder device 1 does not act on the handrail D. The ladder device 1 has a structure that can be retracted from the veranda B or installed on the veranda B by rotating the ladder portion 4 upward or downward at the end of work or at the start of work. Therefore, according to such a ladder device 1, when the repair work or the like takes several days or weeks, the ladder device 1 is easily collected at the end of the daily work, and is easily reinstalled at the start of the daily work. be able to.

  FIG.7 and FIG.8 is the side view and top view which show the whole structure and usage pattern of the construction ladder apparatus which concerns on other embodiment of this invention. 7 and 8 show a step-by-step process of collecting and removing the ladder device installed on the veranda. 7 and 8, the same reference numerals are assigned to the constituent elements or constituent members that are substantially the same as or equivalent to the constituent elements or constituent members of the above-described embodiment.

  FIG. 7A shows a state in which the ladder device 1 is installed on the floor F of the veranda B. The step board portion 2 is supported by a steel step board N of a temporary scaffold, and the grounding portion 5 of the ladder portion 4 is grounded on the upper surface of the floor F and supported by the floor F. The ladder device 1 includes a support 9 that supports the ladder portion 4 so as to be movable up and down. The support 9 supports the ladder part 4 so as to be relatively displaceable or slidable in the vertical direction, and the ladder part 4 is configured so that the floor F is not in use when it is not in use, as shown in FIGS. 7B and 7C. It can move to the upper area. Further, the support 9 is supported by the tread portion 2 so as to be rotatable about a horizontal axis, and the ladder portion 4 is rotated to a position parallel to the upper surface of the tread portion 2 when removed as shown in FIG. Can move.

  The support 9 includes a fixed shaft 90 that is horizontally supported by the tread plate portion 2 and a ladder holding portion 91 that is rotatably supported by the fixed shaft 90 about the horizontal axis of the fixed shaft 90. The fixed shaft 90 is fixed to a bracket protruding from the tread plate portion 2. The ladder holding portion 91 has a rectangular opening through which the column 40 of the ladder portion 4 passes, and the column 40 is supported by the ladder holding portion 91 so as to be vertically movable or slidable.

  The support tool 9 includes a locking tool 92 that restrains the vertical movement of the ladder part 4 relative to the ladder holding part 91. The locking tool 92 can fix the support column 40 to the support tool 9 at a position where the ladder portion 4 is moved downward. A plurality of locking holes or the like that are locked to the locking tool 92 are provided in the support column 40, and the fixing position of the support column 40 with respect to the support device 9 is adjusted stepwise according to the height relationship between the floor F and the tread plate 2. can do.

  The support tool 9 further includes a locking tool 93 that restrains the rotation of the ladder holding portion 91 relative to the fixed shaft 90. The locking tool 93 is for fixing the angle of the support column 40 with respect to the tread plate portion 2, and the angle of the support column 40 is the inclined position shown in FIG. 7A, the vertical position shown in FIG. 8 can be fixed at the horizontal position shown in FIG.

  The cue bar 3 is pivotally attached to the support column 40 by the horizontal support shaft 7 and rotates around the horizontal axis of the support shaft 7 as shown by an arrow α in FIG. The column 40 has a position fixing means (not shown) for fixing the cue bar 3 to a vertical position. When the ladder device 1 is used, it is erected at the vertical position shown in FIG. 7 (A). When the ladder device 1 is not used, the fixing means is released, and the clasp bar 3 is moved as shown by an arrow α in FIG. 7 (A). It can be rotated downward. The support column 40 includes position fixing means (not shown) for fixing the clue bar 3 rotated downward at a position parallel to the support column 40 (FIG. 7B).

  At the end of the operation, as shown by arrow α in FIG. 7 (A), the clasp bar 3 is rotated downward, the locking tools 92 and 93 are released, and the arrows in FIGS. 7 (A) and 7 (B) are released. As shown by β, η, and γ, the ladder part 4 can be retracted upward as shown in FIG. For example, when the construction takes several days, the ladder part 4 is retreated to the upper area of the floor F after the completion of the daily work, and the ladder part 4 is moved downward and tilted at the start of the next morning work. What is necessary is just to fix | fasten the locking tools 92 and 93 in the use position shown to fix the position of the ladder part 4. FIG.

  When the ladder device 1 is removed after the construction is completed, the ladder portion 4 is lifted upward as shown by arrows α, β, η, and γ in FIGS. 3 is fixed at a position parallel to the column 40, and then the column 40 is rotated to the outdoor side as shown by an arrow ε in FIG. 7C, and then the column 40 is moved as shown by an arrow φ in FIG. While moving horizontally, the fastening force of the fixing tool 8 is released to release the tread plate portion 2 from the steel tread plate N, whereby the ladder device 1 can be removed from the temporary scaffold. When the ladder device 1 is newly installed on the veranda B, the installation work may be performed by a procedure reverse to this procedure.

  Thus, since the ladder device 1 according to the present embodiment is also supported by the steel step board N and the floor F and is separated from the handrail D, the load or load of the ladder device 1 does not act on the handrail D, and The ladder device 1 has a structure that can be retracted from the veranda B or installed on the veranda B by moving the ladder portion 4 upward at the end of the work or at the start of the work. Therefore, according to such a ladder device 1, when the repair work or the like takes several days or weeks, the ladder device 1 is easily collected at the end of the daily work, and is easily reinstalled at the start of the daily work. be able to.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. Is possible.

  For example, in the above embodiment, the temporary scaffold has been described as a frame scaffold, but the ladder device of the present invention can be similarly applied to other types of temporary scaffolds such as a single pipe scaffold and a wedge scaffold. The ladder plate portion of the ladder device can be appropriately adjusted or changed in design so that it can be attached to various scaffolding plates such as aluminum, wooden and steel scaffolding plates.

  In the above embodiment, the main part of the ladder components (side girders, footboards, handrail assemblies, etc.) has been described as being made of aluminum alloy members / parts, but other alloy parts, The ladder component may be manufactured by steel parts or resin parts.

  Furthermore, the shape, structure, dimensions, etc. of the ladder components can be appropriately changed in accordance with the usage form of the ladder device. For example, although the above embodiment has described a ladder associated with a handrail on a veranda, the ladder device of the present invention can be used to straddle a rooftop parapet section, a handrail or a fence with a relatively low design, etc. In such a case, it is considered that the dimensions and the like of each part can be changed to dimensions suitable for the application.

  INDUSTRIAL APPLICABILITY The present invention is applied to a ladder device for moving up and down that is installed between a temporary scaffolding and a veranda of a building in a renovation work for an apartment house. Since the ladder device of the present invention has a structure that is separated from the handrail of the building and does not impose a load or load on the handrail, and can be easily recovered at the end of daily work and easily re-installed at the start of work, This is extremely advantageous in practice.

DESCRIPTION OF SYMBOLS 1 Ladder apparatus 2 Tread board part 3 Cue stick 4 Ladder part 5 Grounding part 6, 7 Horizontal support shaft 8 Fixing tool 9 Support tool A Building B Veranda C Temporary scaffolding D Handrail E Boundary wall F Floor K Building frame M, N Steel Tread board J Bracket

Claims (6)

In the construction ladder apparatus installed across the handrail or standing part of the outer peripheral part of the building for the up-and-down movement between the floor of the temporary scaffolding and the floor of the outdoor open space around the outer wall of the building,
A planar substrate portion removably attached to a floor plate or floor slab of a temporary scaffold;
A ladder part that is pivotally or movably supported by the support shaft or support of the base plate part, and that can be adjusted in length so as to contact the floor of the outdoor open space when in use;
The ladder portion is pivoted or moved upward when not in use, and retreats to the outdoor side of the handrail or the standing portion or to the upper area of the floor. It is supported by the substrate part so as to be rotatable, or is supported by the support tool so as to be relatively movable or slidable in the vertical direction,
In order to use the horizontal upper surface of the floor plate or floor slab as a planar bearing body, the base plate portion includes a horizontal and planar supported surface that is in surface contact with the horizontal upper surface, and the supported surface is A construction ladder apparatus having a depth dimension equal to or greater than a depth dimension of the floor plate or floor slab and a width dimension equal to or greater than the width dimension of the ladder portion.   The ladder device further includes a handrail member supported by the substrate portion or the ladder portion, and the handrail member is supported by the substrate portion or the ladder portion so as to be rotatable or relatively movable, and in a standing position or in use. The construction ladder apparatus according to claim 1, wherein the construction ladder apparatus is held in a standing position.   The base plate portion has a form that covers the upper surface and the side surface of the floor board or floor slab, a fixing tool that presses the side surface of the floor board or floor slab, and a side edge of the floor board or the tread board on the opposite side of the fixing tool The construction ladder device according to claim 1, further comprising a locking portion that is locked to the portion. In the method of supporting the ladder device for construction installed for movement between the floor of the temporary scaffold and the floor of the outdoor open space around the outer wall of the building,
Removably attaching a planar substrate portion having a horizontal and planar supported surface that contacts a horizontal upper surface of a floor plate or floor slab of a temporary scaffold to the floor plate or floor slab,
A planar support body for supporting the supported surface by setting the depth dimension and the width dimension of the supported surface to be larger than the depth dimension of the floor plate or slab and the width dimension of the ladder portion, respectively. Using the floorboard or floor slab as
A ladder part that contacts the floor of the outdoor open space is substantially horizontal so that the ladder part is rotated or moved upward when not in use and retracted to the outdoor side of the handrail or the standing part or to the upper area of the floor. The ladder part is supported by the support member of the board part which supports the ladder part so as to be rotatable by a support shaft of the board part having an axis, or supports the ladder part so as to be relatively movable in the vertical direction or slidable. Supporting method of the ladder apparatus for construction, characterized in that it is supported so as to be movable up and down.   The handrail member is supported by the substrate portion or the ladder portion so as to be rotatable or relatively movable, and the handrail member is rotated to a position parallel to the substrate portion or the ladder portion when the ladder device is not used or removed. The support method according to claim 4, wherein the handrail member is held in a standing position or a standing position when the ladder device is used.   The upper surface and side surfaces of the floor plate or floor slab are covered with the substrate portion, the side surfaces of the floor plate or floor slab are pressed, and the substrate portion is locked to the side edge of the floor plate or tread. The supporting method according to claim 4 or 5.

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