JPH0729192U - Staircase scaffolding - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a staircase scaffold mainly used at a construction site, and an object thereof is to provide a staircase scaffold that is easy to install. [Structure] A parallel crank mechanism was constructed with a work floor, connecting rods and short legs, and extendable legs and canes were installed on these.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a staircase scaffold used at a construction site.

[0002]

[Prior art]

 In the conventional staircase (in the construction work, the room provided for the stairs), the space is formed by the stairs, the back of the stairs, the horizontal ceiling surface and the wall surface. The ceiling surface, raised back surface, wall surface and stair surface (stepping surface and rise surface) of this staircase will be decorated with mortar, cement paint, spraying, painting, linoleum flooring, etc. In particular, for the above interior work except for the stairs, a steel single pipe scaffold was built inside the staircase, and scaffolding boards, road boards, etc. were laid on this to construct a pier, and this was used as a foothold for the interior work. .

[0003]

[Problems to be solved by the device]

 However, the above-mentioned scaffolding boards, road boards, etc., formed slopes along the stairs, and footstops (steps) were struck on them to prevent workers from slipping. It became a very dangerous work jetty when dust, paper pieces, and sawdust attached. Or, the steel single pipe scaffold is assembled by assembling the pipes and connectors appropriately according to the site, so that the ends of the pipes project from the joints in various lengths, and the workers and passersby in the narrow staircases It was a very dangerous protrusion for people.

[0004]

[Means for Solving the Problems]

 Therefore, in order to eliminate the above-mentioned drawbacks, the present invention pivots the short legs at the four corners of the girder of the work floor, and connects the two short legs parallel to the work floor by arranging them on each side in the longitudinal direction of the work floor. Two sets of parallel crank mechanism are formed by pivotally connecting with a rod, and the parallel crank mechanism is provided with a locking device that can adjust the parallel motion stepwise, and at the other end of each short leg mentioned above. An extendable long leg is pivotally attached, and an extendable cane is pivotally attached to the long leg and the connecting rod, and a stopper device capable of fixing the extendable length to the extendable leg and the cane is installed. An object of the present invention is to provide a staircase scaffold characterized by the above, and a staircase scaffold characterized by narrowing the width of the working floor of the staircase scaffold from the main entrance to the end entrance.

[0005]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. A work floor (1) made of extract band metal is provided, and step pedestals (2) are fixed on the upper surface of the work floor (1) at regular intervals. It Equal angle steel is used for the cross rail (2). The work band (1) made of extract band metal is composed of an extract band metal plate, a girder (3) and a girder (4) for receiving the plate. One end of short legs (5a) (5b) (5c) (5d) having a U-shaped cross section is pivotally attached to each of the four corners of the large beam (3) on the back surface of the work floor (1). At the other end, a long leg (6) that can be extended and retracted is pivotally attached. Two short legs (5a) (5b) and (5c) (5d), which are arranged along the longitudinal side of the work floor (1), are respectively connected by connecting rods (7) (8) parallel to the work floor. It is pivotally connected to form two sets of parallel crank mechanisms. The connecting rods (7) and (8) forming two sets of parallel crank mechanisms facing each other are connected by a connecting rod (9). Using the connecting rod (9) as a foot, the jack (11) having the roller head (10) is installed in the space between the connecting rod (9) and the back surface of the working floor (1). The roller head (10) is brought into contact with the lower surface of the beam (12) at the center of the back surface of the work floor (1). A retractable cane (13) is pivotally attached to the long legs (6) and the connecting rods (7) and (8). A stopper device (14) is attached to the extendable leg (6) and the cane (13) so that the extension width can be adjusted.

In addition, a hanger (15) having an L-shaped cross section is hung at one end of the working floor (1) of the above-mentioned scaffolding for stairs, and another member receiver (16) of the hanger (15) separates it. You may hold the back side of the working floor (1 ') of the staircase scaffold. In this case, the member receiver (16) of the hanger (11) was loosely inserted between the links of two sets of horizontal crank mechanisms formed below the working floor (1 ') of another staircase scaffold. Be dressed.

The width of the work floor may be narrowed from the main opening (17) toward the end opening (18) to form a work floor (1 ″) having a substantially trapezoidal plane.

When the jack (11) is raised, the short legs (5a) (5b) (5c) (5d) forming the parallel crank mechanism are respectively perpendicular to the work floor (1). When the jack (11) is operated and its roller head (10) is lowered, the parallel crank mechanism is deformed by causing parallel crank motion as much as the roller head (10) is lowered. Due to the deformation, the short legs (5a) (5b) (5c) (5d) displace the angle of 90 ° with respect to the work floor (1) to an angle θ.

The long leg (6) pivotally attached to the short leg can be folded toward the opening direction of the short leg having a U-shaped cross section. The long leg (6) and the cane (13) are double tubes in which the inner tube is fitted into the outer tube, and can be expanded and contracted by taking the inner tube in and out of the outer tube. The stopper device (14) that can adjust the expansion and contraction width is composed of at least one hole provided in the outer pipe, a bartack provided near this hole, and a large number of holes provided in the inner pipe, and the expansion width can be adjusted. Barrels are inserted into the holes of the outer tube and the inner tube that correspond to each other, and the length of the long leg (6) or the cane (13) is fixed.

According to the gradient of the stairs, the jack (11) is operated to displace the angle θ between the displaceable short legs (5a) (5b) (5c) (5d) and the work floor (1). Match the angle θ with the slope of the stairs. The short legs (5a) (5b) (5c) (5d) play an important role as joints that can maintain the angle of the stairs as they are, and serve as a ruler for standing the foldable long legs (6). It is a thing. The cane (13) is a diagonal member that solidifies the corner formed by the long leg (6) and the girder (3). The cane (13) is pivoted at one end to the girder (3) and at the other end to the long leg (6). Therefore, this walking stick (13) gradually extends until the standing up of the long legs (6) is completed, but at the time when the standing up is completed, the stopper device (14) is used to turn the corner portion. It is used as a diagonal material to solidify. The work floor (1) and the short legs (5a) (5b) (5c) (5d) can be firmly fixed by stopping the normal crank motion, and the long legs (6) are respectively short legs (5a). (5b) (5c) (5d) and cane (13) can be firmly fixed.

When the backside of the working floor (1 ') of another staircase scaffold is held by the member receiver (16) of the hanger (15), two or more staircase scaffolds can be used as members of the hanger (15). It can be connected with a receiver (16). The member receiver (16) of the hanger (11) is loosely inserted between the links of the two sets of parallel crank mechanisms formed below the working floor (1 ') of another staircase scaffold, so that When using a staircase scaffolding connected to a platform, it can be pulled out for use, and retracted for storage.

If the width of the work floor is narrowed from the main opening (17) toward the end opening (18), when the staircase scaffolding connected with several units is pulled out, the second narrow end opening Since (18) approaches the wide base opening (17) of the first unit, a clearance is generated on both sides of the overlapping section (A).

[0013]

[Effect of device]

 By setting the angle of the short legs so that it will follow the stairs of the construction site in advance, it will be possible to immediately parallelize the stairs of the staircase by raising the folded long legs at the work place. You can get a foothold to do. The staircase scaffolding can be installed in a short time. The structure is functionally standard, it can remove dangerous protrusions and the staircase scaffolding can be installed easily. The work floor is made of extra-band metal, and it is made of steel pipes and lightweight shaped steel, so it is lightweight and easy to carry in and out. The hanger member can be used as a metal fitting, and several staircase scaffolds can be used as a set. In this case, even in situations where it is not possible to assign integers to the span of the staircase, the length of the work floor can be set according to the span of the staircase by overlapping the connecting parts. If multiple staircase scaffolds are connected, the protrusions of the parts will easily cross each other, and unique paints or fragments of objects will easily adhere to the staircase scaffolds, which may cause problems that prevent smooth withdrawal and retraction. It's easy, but the clearances that occur on both sides of the overlap can eliminate those problems, and if you use the clearances, you can also use the stairs with R, and the scaffolding for stairs with R accordingly. Can be formed.

[Brief description of drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a plan view of the present invention.

FIG. 3 is a front view of the present invention.

FIG. 4 is a side view showing a usage state of the present invention.

FIG. 5 is a plan view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Working Floor 1'Working Floor 1 "Working Floor 2 Crossing Beam 3 Large Beam 4 Small Beam 5a Short Leg 5b Short Leg 5c Short Leg 5d Short Leg 6 Long Leg Piece 7 Connecting Rod 8 Connecting Rod 9 Connecting Rod 10 Roller Head 11 Jack 12 Beam 13 Cane 14 Stopper device 15 Hanger 16 Member receiving 17 Main opening 18 End opening A Overlapping part

Claims (2)

[Scope of utility model registration request] 1. Short legs are pivotally attached to the four corners of the girder of the work floor, and two short legs arranged along one side in the longitudinal direction of the work floor are pivotally connected by connecting rods parallel to the work floor. Two sets of parallel crank mechanisms are formed, and a locking device that can adjust the parallel movement of the parallel crank mechanisms in stages is attached, and an extendable long leg is pivotally attached to the other end of each short leg. The staircase is characterized in that a stretchable cane is pivotally attached to the long leg and the connecting rod, and a stopper device capable of fixing the stretchable length to the stretchable long leg and the cane is installed. Scaffolding. 2. The scaffolding for stairs according to claim 1, wherein the width of the work floor is narrowed from the main opening toward the end opening.