JP2010265748A - Stair frame for temporary scaffolds - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stair frame which can fix a leg body at a lower end of a stringer to a scaffold board on various kinds of the scaffold boards. <P>SOLUTION: A plurality of tread boards 9 are attached at predetermined intervals between a pair of stringers 8, a hook is fixed at an upper end of the stringer 8, so that the hook can be latched on a horizontal member of upper scaffolding, and the leg body 12 for placing a scaffolding board is provided at a lower end of the stringer 8. A locking rod body 22 whose lower end is a bent portion 22c is provided in the leg body 12. The locking rod body 22 is inserted into a slit 5c between tread surface plates 5a which comprise scaffold ledger plates 5, and the bent portion 22c of the lower ends abuts on the undersurface of the scaffold ledger plate 5 so as to fix the leg body 12 to the scaffold ledger plate 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a temporary scaffolding staircase frame used for raising and lowering a temporary scaffolding constructed at a construction site or the like. Specifically, a hook provided at the upper end is hooked to an upper scaffolding horizontal member, and a lower end is laid at a lower stage. The present invention relates to a staircase frame placed on a plate.

  When constructing a building or the like, a temporary scaffolding is assembled around the building. However, in many cases, a staircase frame for a temporary scaffolding is used for ascending and descending to a scaffolding plate laid on each layer. A conventional staircase frame has a structure in which a plurality of treads are attached at a predetermined interval between a pair of side girders, and hooks for hanging on the horizontal scaffolding of the upper scaffolding or the lower scaffolding are fixed to the upper and lower ends of the side girders, respectively. there were.

  However, in such a staircase frame, the distance of the horizontal member to be hooked is specified. For example, in the case of a framed scaffold, the main frame height and the brace length to which one staircase frame can be applied are limited. . Therefore, the lower end hook of the staircase frame had to be placed on the lower scaffolding plate even when the frame distance changed slightly.

  Since it is dangerous to point-support the staircase frame with the lower end hook, a temporary scaffolding staircase frame has been proposed in which a leg for placing a scaffolding plate is provided at the lower end of the side beam. As such a staircase frame, for example, there are conventional techniques as described below.

  As shown in FIG. 11, the staircase frame described in Patent Document 1 has a hook 111 fixed to the upper end of the side beam 108 and a base plate 114 disposed at the lower end. A support member 115 is erected on the base plate 114 and is rotatably attached to each side beam 108 via a shaft body 116. The staircase frame 107 has a configuration in which the hook 111 is hooked to a horizontal member of a building frame (not shown), and the support member 115 is rotated so as to be horizontal while the base plate 114 is in contact with the ground or the lower scaffolding plate. It was.

  Similarly, as shown in FIG. 12, the staircase frame described in Patent Document 2 is provided with a leg portion 212 having a hook 211 fixed to the upper end and a plate body bent at the lower end, and the leg portion 212 is a tread 209. These support members 208 and 218 were attached to be freely rotatable.

  Each of these conventional staircase frames has a configuration in which the base plate 114 and the leg portion can be arbitrarily set by moving the base plate 114 or the leg portion 212 at the lower end to an arbitrary position on the scaffold plate. Since 212 is a structure that is simply placed horizontally, it was unable to resist vibrations caused by wind pressure and earthquakes.

  On the other hand, the staircase frame described in Patent Document 3 is provided with a hook 311 at the upper end as shown in FIGS. 13 and 14, and a rotatable locking pin 322 can be moved laterally on the lower side surface of the side beam 308. It was the structure which attaches and attaches this latching pin 322 to the hole formed in the scaffold cloth board 305 so that attachment or detachment is possible.

  In the case of this staircase frame, the lower part of the side beam 308 can be fixed by inserting the locking pin 322 into the hole of the scaffold cloth plate 305, and even if there is an external load such as vibration and wind pressure, the lower part of the staircase does not slip and is safe. Yes, there was an advantage that the worker's anxiety could be resolved. Further, since the locking pin 322 can be displaced in the lateral direction, a hole drilled in the scaffold cloth plate 305 can be selected and inserted. As a result, the lower part of the side beam 308 could be fixed while being shifted along the scaffolding cloth plate 305, and the inclination angle of the stairs could be changed.

JP-A-11-62217 Japanese Patent Laid-Open No. 2002-339563 Japanese Patent Laid-Open No. 2004-52445

    However, since the conventional staircase frame is configured to insert the locking pin 322 into the hole, it cannot be stopped unless there is a hole in the lateral movement range of the pin. Further, it could not be fixed with a scaffold cloth plate in which appropriate holes were not drilled.

  The present invention has been made to solve the above-mentioned problems of the conventional staircase frame for temporary scaffolding. The lower end of the staircase frame is moved to an arbitrary position on various scaffolding plates so that the inclination angle of the stairs can be arbitrarily set. It is an object of the present invention to provide a staircase frame that can be set to be fixed to the leg plate at the lower end of the side beam.

  In order to solve the above problems, a temporary scaffolding staircase frame according to the present invention has a plurality of step boards attached at a predetermined interval between a pair of side girders, and a hook that is hooked on a horizontal member of the upper scaffolding at the upper end of the side girders. In the staircase frame for temporary scaffolding, which is fixed and provided with legs for placing scaffolding plates at the lower ends of the side girders, the legs are provided with a pedestal that is provided with a rising portion on one side between the side girders and pivotally supported on each side girder. And a rotatable holder disposed substantially in the center of the rising portion, and a locking bar body loosely inserted into the holder.

  The pedestal is installed on the scaffolding plate, and the mounting angle between the pedestal side plate and the side girders is rotated so that the height between the different layers of the temporary scaffolding can be accommodated. By rotating the holder, the locking bar body can take a horizontal or vertical positional relationship with the scaffold plate. When the scaffolding plate is provided with an opening for inserting a rod body, this is inserted and fixed to the scaffolding plate, and measures such as blowing up are taken.

  Further, when there is no opening in the scaffold plate, the pedestal and the scaffold plate are fixed with a band for the scaffold plate. At this time, if the band is wound along the rising portion, the band is prevented from coming off. The locking rod body is stored horizontally with respect to the scaffold plate.

  The pedestal of the temporary scaffolding pedestal frame according to claim 2 is provided with a fastener that can be fixed in accordance with a predetermined range of stairs inclination angles, and the locking bar is inserted through a slit formed in the center of the scaffolding cloth board. A substantially L-shaped bar body that locks the lower end to the lower surface of the cloth board, and is provided with an elastic body that urges the bar body at the time of locking upward.

  The fastener has a configuration in which, for example, a bolt different from the pivot shaft is inserted and fastened into a long hole formed in the pedestal immediate plate. The bolt is moved along the long hole corresponding to a predetermined step inclination angle, and fixed to the side beam while ensuring the level of the pedestal.

  Scaffolding fabric boards are two tread boards that are rectangular in the width direction, and their short sides are connected by a lateral plate material. Adjacent portions of the two tread boards are separated by a predetermined distance and slit in the longitudinal direction. Open. Since the locking bar is loosely inserted into the holder, the L-folded portion can be inserted into the scaffold fabric board by rotating the L-shaped bent portion in the direction of the slit. Is rotated in a direction perpendicular to the slit.

  The bent portion comes into contact with the lower surface of the cloth plate by the action of the elastic body. By appropriately setting the length of the rod body and the length of the elastic body, it can be applied to cloth plates having different thicknesses.

  Since the staircase frame for temporary scaffolding of the present invention is provided with a rising portion on one side of the base of the leg body, even if the locking bar cannot be inserted into the scaffold board, the base board and the scaffold board can be fixed with the band for the scaffold board. The rising portion prevents the band from coming off. In other words, it is possible to move to any position on the scaffolding plate with respect to the scaffolding plate provided with the opening for inserting the locking rod body and with respect to the scaffolding plate without the opening, so that the inclination angle of the stairs is arbitrarily set. While being able to set, the leg body of the side beam lower end can be fixed to a scaffold board.

  The pedestal of the temporary scaffolding staircase frame according to claim 2 is provided with a fastener that can be fixed in accordance with a predetermined range of staircase inclination angles. Therefore, the side plate of the pedestal is moved in accordance with the predetermined staircase inclination angle, It can be fixed to the side girders while ensuring the horizontal position.

  In addition, since the locking rod body is an approximately L-shaped rod body and an elastic body is attached, in the case of a scaffolding cloth board having a slit in the center, it can be inserted at any place, and after insertion, it is elastic. The bent portion can be brought into contact with the lower surface of the cloth board by the action of the body, and the fixing of the staircase frame and the scaffold cloth board is ensured.

It is a side view of the temporary scaffold which uses a staircase frame. It is the side view which extracted the latching | locking part of the staircase frame and the scaffold cloth board in FIG. It is a side view of a staircase frame. It is a front view of a staircase frame. It is a side view of the lower part of the stairs frame which attaches a leg. It is an A direction arrow directional view of FIG. It is a side view of the lower part of the staircase frame which locks a locking rod body to a scaffold cloth board. It is a B direction arrow directional view of FIG. It is sectional drawing which shows CC cross section of FIG. It is a front view of the lower part of the staircase frame to be placed on a scaffolding cloth board that does not open a slit. It is a side view of the conventional staircase frame. It is a perspective view of the conventional staircase frame. It is a side view of the conventional staircase frame. It is a front view of the conventional staircase frame.

  Next, an embodiment of the present invention will be described in detail based on the attached screen. FIG. 1 is a side view of a temporary scaffold that uses a staircase frame, FIG. 2 is a side view of the staircase frame and the scaffolding board in FIG. 1 extracted, FIG. 3 is a side view of the staircase frame, and FIG. FIG. The temporary scaffold 1 is constructed by combining a plurality of building frames 2 and jack bases 3, crossing struts 4, scaffolding cloth boards 5, handrails 6, etc., and stacking them together. A staircase frame 7 is used to move up and down on the cloth board 5.

  As shown in FIG. 4, the staircase frame 7 has a plurality of treads 9 attached at a predetermined interval between a pair of side girders 8, a hook 11 is fixed to the upper end of the side girders 8, and a leg body at the lower end of the side girders 8. 12 is provided. The hook 11 is detachably hooked to the horizontal member 10 constituting the building frame 2 of the upper scaffold, and the leg 12 is placed on the scaffolding cloth plate 5 and a stair frame is used using a locking tool described later. Fix the lower end of 7 so that it does not shake.

  The reason why the legs 12 are placed on the scaffolding cloth board 5 is to make it possible to cope with the height of different layers of the temporary scaffolding 1 with one staircase frame 7, and as shown in FIG. There is also an effect of improving safety during ascending / descending by presenting a landing space for continuous stairs.

  As typical layers of the building frame 2, for example, there are ho = 1725 mm, 1800 mm, and 1835 mm. When the step inclination angle when ho = 1800 mm is θo = 50 °, when ho = 1725 mm, if the leg 12 is appropriately slid, θo = about 47 °. Similarly, when ho = 1835 mm, θo = about 51 °. As described above, the staircase frame 7 is configured such that the leg 12 can be placed horizontally with respect to the scaffold cloth plate 5 in accordance with a predetermined range of stair inclination angles.

The tread plate 9 is fastened to the side girders 8 with bolts and nuts 13, and the mounting angle with the side girders 8 is fixed. When this attachment angle is set to θ ₁ = 50 °, for example, even if the step inclination angle θo changes from about 47 ° to about 51 ° as described above, the angle at which the tread plate 9 is inclined from the horizontal plane is 3 ° to −1. As it is extremely small, it does not hinder raising and lowering.

  Next, details of the leg will be described with reference to FIGS. FIG. 5 is a side view of the lower part of the staircase frame to which the legs are attached, and FIG. 6 is a view in the direction of arrow A in FIG. The leg body 12 is provided with a flat base 14 between the side girders 8, and supports the base side plate 15 erected on both sides thereof to the side girders 8. The pedestal side plate 15 is formed with a bolt hole through which the support bolt 16 is inserted and a long hole 18 through which the fixing bolt 17 provided below the hole is inserted.

  When the nut of the fixing bolt 17 is loosened, the pedestal side plate 15 can be rotated with respect to the side beam 8 within the range of the long hole 18. The fixing bolt 17 is moved along the long hole 18 in correspondence with a predetermined step inclination angle, and is fixed to the side beam 8 while ensuring the pedestal 14 is horizontal.

  A low rising portion 19 is provided on one side of the pedestal 14, and a plate-shaped fixing bracket 20 is fixed to substantially the center of the rising portion 19, and a holder 21 that can be rotated is attached thereto. This holder 21 loosely inserts a substantially L-shaped locking rod body 22. A fastener 22 a having a U-shaped cross section is fixed to the linear end of the locking rod 22, and a coil spring 22 b is wound between the fastener 22 a and the upper end of the holder 21. The direction of the lower end bent portion 22c of the locking rod body 22 is changed by gripping the fastener 22a and turning in the rod body cross-sectional direction.

  Next, a method of locking the leg body to the scaffold cloth board with the locking bar will be described with reference to FIGS. 7, 8 and 9. 7 is a side view of the lower part of the staircase frame for locking the locking bar body to the scaffolding cloth, FIG. 8 is a view in the direction of the arrow B in FIG. 7, and FIG. 9 is a cross-sectional view showing the CC section of FIG. .

  As shown in FIG. 9, the scaffold cloth board 5 has two rectangular tread boards 5a arranged side by side in the width direction, and the short sides thereof are connected by a lateral board material 5b. The two tread boards 5a and 5a are connected to each other. Since the adjacent portions are separated by a predetermined distance, a slit 5c is opened in the longitudinal direction. A hook 5d protrudes from the end of the scaffold cloth plate 5 and is hooked on the horizontal member 10 of the building frame.

  The upper and lower surfaces of the plate material 5b, which is a bent product of sheet metal, are joined to the tread plate 5a by welding to cover the horizontal member 10. This is because in the case of a conventional scaffold cloth board, a gap is formed in the joint part of the horizontal member, and there is a possibility that this gap may lead to a flying fall accident or the like. The purpose is to improve the workability by eliminating the unevenness.

  However, the staircase frame cannot be spanned if there is no gap in the horizontal member joint. In particular, at the bottom of the staircase frame where the scaffolding fabric board is laid continuously, the hook cannot be hooked to the horizontal member, and the lower end of the staircase frame inevitably adopts the method of placing it on the scaffolding fabric board It will be.

  In the case of such a scaffold cloth board 5, as shown in FIG.5 and FIG.6, by inserting the bending part 22c of the latching rod body 22 with the direction of the slit 5c, insertion in the arbitrary places of the scaffold cloth board 5 is possible. It becomes possible. Thereafter, the fastener 22a is pushed down against the elastic force of the coil spring 22b, and the bent portion 22c is rotated in a direction perpendicular to the slit 5c below. As shown in FIGS. 7 and 8, the bent portion 22c abuts on the lower surface of the cloth plate 5 by the action of the coil spring 22b.

  Thus, by locking the locking bar 22 to the scaffold cloth plate 5, it is possible to take measures such as blowing up prevention, and the lower part of the stairs does not slip even if there is an external load such as an earthquake. Further, by appropriately setting the length of the locking bar 22 and the length of the coil spring 22b, the present invention can be applied to a cloth board having a different thickness, for example, a scaffold cloth board having a thickness of 40 mm to 50 mm.

  In addition, the locking bar body is used in a stored state when it is other than a scaffolding cloth plate having a slit in the center. This embodiment is shown in FIG. FIG. 10 is a front view of the lower part of the staircase frame to be placed on the scaffolding cloth without opening the slit.

  When the locking bar 22 is not used, the holder 21 is rotated to take a horizontal positional relationship with the scaffold cloth plate 55, and the base plate 14 and the scaffold plate 55 are fixed using the band 56 for the scaffold plate. At this time, when the band 56 is wound along the rising portion 19, the band is prevented from coming off.

  INDUSTRIAL APPLICATION This invention can be utilized for the staircase frame for temporary scaffolds used for the raising / lowering of the temporary scaffold constructed | assembled at a construction site, etc.

DESCRIPTION OF SYMBOLS 5 Scaffold cloth board 5c Slit 7 Stair frame 8 Side girder 9 Tread board 10 Horizontal member 11 Hook 12 Leg body 14 Base 15 Base side board 16 Support bolt 17 Fixing bolt 18 Long hole 19 Standing part 20 Fixing bracket 21 Holder 22 Locking rod 22a Fastener 22b Coil spring 22c Bent part

Claims (5)

A plurality of treads are attached at a predetermined interval between a pair of side girders, a hook to be fixed to a horizontal member of the upper scaffolding is fixed to an upper end of the side girders, and a leg for placing a scaffolding plate is attached to the lower end of the side girders. In the staircase frame for temporary scaffolding,
The leg is provided with a locking bar whose lower end is a bent part, and the locking bar is inserted into a slit between the tread plates constituting the scaffolding cloth board to insert the bent part into the leg. A staircase frame for temporary scaffold, wherein the staircase frame is in contact with the lower surface of the scaffold fabric board.   2. The temporary scaffolding staircase frame according to claim 1, wherein the locking rod body is provided with an elastic body that abuts the bent portion against a lower surface of the scaffold cloth board. Stair frame.   The staircase frame for a temporary scaffold according to claim 2, wherein the elastic body is wound around the locking bar body between a fastener disposed at a linear end portion of the locking bar body and the leg body. A staircase frame for temporary scaffolding, characterized by being a coil spring.   The temporary scaffolding staircase frame according to any one of claims 1 to 3, wherein a tip of the bent portion of the locking bar body is an upright portion having an upward rising component. Scaffolding staircase frame. In the staircase frame for temporary scaffolds in any one of Claims 1-4, the said tread boards are members which comprise the said one scaffold cloth board, The said tread boards are attached to this scaffold cloth board. A temporary scaffolding staircase frame characterized in that a plate material to be connected is provided.

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