JP4574705B2 - Suspended scaffolding - Google Patents

Description

  The present invention relates to a suspension scaffold used for work such as repair and inspection of a railway or road viaduct.

  In recent years, viaducts such as reinforced concrete railways or roads that have been treated as permanent structures have suffered deterioration damage such as peeling and dropping of the concrete due to neutralization of the concrete. Therefore, renewal work is required after the damage or before the damage occurs. Temporary scaffolding with a framework scaffold that forms a scaffold by reassembling the product's bitter frame from the ground part to renew the protruding part (hereinafter referred to as the ground cover part) of the construction work on the viaduct such as railways and roads. Is adopted.

  In addition, when the ground portion is relatively horizontal and the work site moves in a short period of time, a rolling scaffold that is a scaffold with wheels attached to the lower part of the tower-like scaffold may be used.

  Furthermore, when there is a relatively large space on the ground part, a scaffold equipped with a gondola for working at high places is used and can be moved because it is a vehicle scaffold.

  The frame scaffolding, rolling scaffold, vehicle moving scaffold, etc. can be used when there is a space on the ground part, but when a house or store is close to the tip of the ground cover or under the viaduct, When used as a car park or a bicycle parking lot, these temporary scaffolds may be impossible to install or move.

  In addition, even if there is a space for moving scaffolds or moving under the viaduct, if there is a large amount of traffic by vehicles or people, the time taken to occupy the temporary scaffold is often severely limited. Traffic will be hindered.

Suspension scaffolds are used there. As this suspension scaffold, one using a fixing weight for installation as shown in Patent Document 1 below, one having a clamping part for clamping the top end of the rail, and like Patent Document 2 and Patent Document 3 below There is a gondola type suspension type equipped with a bogie.
JP 2005-171703 A JP 2002-138659 A JP 10-18230 A

  The suspended scaffold 101 shown in FIGS. 4 and 5 is the content of the invention of Patent Document 1, and is composed of a plurality of main frames 102 that are integrally connected at a predetermined pitch by a connecting frame 115. A vertical frame 106, an upper horizontal frame 107, and a lower horizontal frame 108 having a rising frame 109 at the tip are formed in a substantially U-shape.

  A subframe 103 formed in a substantially L shape by connecting a hanging frame 111 to the tip of the upper horizontal frame 107 of the main frame 102 and a horizontal frame 112 protruding horizontally from the lower end of the hanging frame 111, and A plurality of wall covering materials 113 to be attached to the vertical frame 106 of the main frame 102 are provided, and the sub frames 103 are arranged in parallel at a predetermined pitch on the horizontal portion 122 inside the rail 105 such as a viaduct. The subframe 103 is fixed on the horizontal portion by loading the subframe fixing weight G having a predetermined weight over the horizontal underframe 112 of 103.

  Each main frame 102 is connected to each sub frame 103 from the outside of the rail 105, and a scaffolding plate 119 is horizontally mounted across the lower horizontal frame 108 of each main frame 102, and the wall covering material attached to the upright frame 109 The tip of 113 is brought into contact with a vertical wall surface 104a such as a viaduct.

  The wall pad 113 is formed of, for example, a round steel pipe (round pipe), and has one end attached to the rising frame 109 and the other end on the lateral end surface 104a (vertical wall surface) of the viaduct beam 104. An abutting piece 113 a that comes into surface contact is provided, and this abutting piece 113 a is brought into contact with the lateral end face 104 a of the beam 104.

  Reinforcing frames 132 and 133 are attached between the vertical frame 106 and the upper horizontal frame 107 of the main frame 102 and between the vertical frame 106 and the lower horizontal frame 108.

  As shown in FIG. 5, a brace (strut) 116 for reinforcing the connection body M is bridged in an X shape between adjacent vertical frames 106, 106 on the connection body M of the main frame 102, and A handrail frame 117 for safety is attached over the upper end portion of the rising frame 109 on each lower horizontal frame 108 side. In addition, a scaffolding board spanning bracket 118 is attached to the middle part of the vertical frame 106 of each main frame 102, and the scaffolding board 120 is bridged over this.

  A ladder 121 is attached to the lower stage scaffolding plate 120 between the lower stage scaffolding plate 119.

  The suspension scaffold 54 shown in FIG. 6 is shown as a prior art in Patent Document 1, 51 is a viaduct beam, 52 is a floor slab, and 53 is a balustrade.

  The suspension scaffold 54 has a plurality of steel pipes arranged vertically at required intervals to form a vertical frame 55, and a plurality of handrail pipes 56 are vertically fixed in parallel to the vertical frame 55, and vertically above each vertical frame 55. An upper horizontal frame 57 is provided at a right angle to the frame 55, and a holding portion for holding the front end portion of the rail 53 is formed by two pipes 58 and 58 at the front end portion of the upper horizontal frame 57. A lower horizontal frame 59 is provided at the lower end of 55, and a rising frame 60 that rises at the tip is attached.

  In using the suspension scaffold 54, the pipes 58, 58 forming the clamping part are used to hold the upper end of the rail 53, and the chain 62 is attached to the anchor 61 with a ring which is inserted into the bottom surface of the floor slab 52 with a hole. The other end is fixed to both ends of the lower horizontal frame 59 or the lower end of the vertical frame 55 and the rising frame 60, and the lower horizontal frame 59 or the vertical frame 55 and the rising frame 60 are suspended by this chain 62. A hanging metal fitting 64, which is U-shaped in a side view and provided with a flange 63 on one opening edge of the U-shape, covers the tip of the rail 53 with the flange 63 facing the outside of the rail 53, One end of the chain 62 is locked to 63 and the other end is locked to the lower end of the vertical frame 55 or one end of the lower horizontal frame 59, and the vertical frame 55 or the lower horizontal frame 59 is suspended by the chain 62.

  In addition, a plurality of pipes 65 are horizontally mounted on the pipes 56, 56 provided at the lower end of the vertical frame 55 and the lower end of the upright frame 60, and a scaffolding plate 66 is disposed thereon so that an operator can walk. It is a thing.

  The suspension scaffold of Patent Document 1 loads a weight G for fixing the subframe on the horizontal frame of the subframe, and secures a space on the horizontal portion extending from the side groove for laying the cable inside the balustrade to the paving stone portion. Must.

  The weight for fixing the subframe is composed of nine H-shaped steel pieces and thirteen sandbags. To secure a sufficient load, the number of weight pieces is large, including loading, unloading, lifting, etc. Handling is troublesome. Furthermore, from the appearance, the load support due to the weight causes anxiety, and there is also a concern that the weight is not properly placed.

  In the case of using a carriage as in Patent Document 2 and Patent Document 3, it is unavoidable to use a large-scale apparatus such as rail laying.

  The suspension scaffold shown in FIG. 6 is a chain in which one end is attached to an anchor with a ring that is inserted by making a hole in the lower surface of the floor slab, etc. The chain that is stretched may interfere with worker traffic.

  The object of the present invention is to eliminate the inconvenience of the above-mentioned conventional example, insert the upper end of the railing such as a viaduct from the lower side, and detachably sandwich the upper end of the railing, and can be installed and removed easily and quickly, And it is providing the suspension scaffold which can fully support the load in the stable state by fully calculating the intensity | strength of the part to which force is applied.

  In order to achieve the above object, the frame material having a substantially U-shaped side surface inserts the upper end of a rail such as a viaduct from the lower side, and the upper end of the rail to the outer surface side of the rail. The upper horizontal frame is formed at the end of the clamp, which is fixed to the upper end of the rail by being pressed by the screw of the screw, and is installed horizontally in the outer direction of the viaduct on the rail, and the tip of the upper horizontal frame A hanging frame connected to the section side, and a lower horizontal frame protruding horizontally from the lower part of the hanging frame in a direction such as a viaduct. The upper horizontal frame is a strength member having a diameter larger than that of the hanging frame. As a type, the suspension frame is suspended below the suspension frame, a reinforcement frame constituting a truss frame is installed at the joint corner between the tip of the upper horizontal frame and the suspension frame, and a suspension reinforcement portion is formed. From the middle of the frame, place the wall support beam material with its tip facing the outer rail of the railing Protruding, such that the frame material of the substantially U-shaped side is juxtaposed at a predetermined pitch along the continuous direction of the outer vertical side wall of the rail by sandwiching the upper end of the rail with the clamping part, and integrally with the horizontal material The gist is to connect the scaffolding plate on the lower horizontal frame, and to obtain the support reaction force from the outer surface of the rail using the wall-supporting beam material corresponding to the clamping performed by the clamping part.

  According to the first aspect of the present invention, the frame material having a substantially U-shaped side surface is juxtaposed at a predetermined pitch along the continuous direction of the outer vertical side wall of the balustrade, and is integrally connected with a lateral material, The scaffolding plate is constructed by spanning the scaffolding plate on the lower horizontal frame, but this side U-shaped frame material inserts the upper end of the high rail such as a viaduct from the lower side and sandwiches the upper end of the high rail By fixing it to the top of the railing, it is easy and quick to install and remove without taking up space, and unlike the case of attaching an anchor by drilling a hole, there is no risk of scratching and weakening the railing Can do.

  Since the upper horizontal frame is a hanger-type strength member having a diameter larger than that of the hanging frame, the upper and lower frames are suspended and supported by the upper horizontal frame.

  Furthermore, by projecting the wall bearing support beam from the middle of the hanging frame with its tip facing the outer rail outer surface, this wall bearing support beam can be used not only as a rotation prevention member but also from the outer rail outer surface. It is used as a load receiving member for obtaining a support reaction force.

  It is important that the abutment portion of the wall bearing support beam material on the outer surface of the rail is aligned with the vertical relationship on the outer surface of the rail that is the same as the screw pressing point to the outer surface side of the rail of the upper end of the rail. is there. Thus, the load support of the suspension scaffold can be obtained on the same vertical surface as the outer surface of the handrail, and the lower portion can be stably supported.

  According to the present invention, the scaffolding plate spanning bracket is formed in the middle part of the hanging frame, and the wall-supporting support beam material from the middle of the hanging frame is projected in the vertical position across the scaffolding plate spanning bracket. The gist of the present invention is to bridge the scaffolding board to the scaffolding board spanning bracket.

  According to the second aspect of the present invention, an upper position of the original work floor (passage) is formed by forming the scaffolding board spanning bracket in the middle part of the hanging frame and bridging the scaffolding board to the scaffolding board spanning bracket. In addition, a work floor (passage) can be provided to make the upper and lower two stages.

  Further, in response to this, the wall-supporting beam member can be improved in stability by projecting at a vertical position with the scaffolding plate spanning bracket interposed therebetween.

  The gist of the present invention described in claim 3 is that the horizontal material is attached at a predetermined height from the scaffolding plate so as to also serve as a handrail material.

  According to the third aspect of the present invention, the horizontal ground material also serves as a handrail material, so that a separate handrail material is not required.

  In the present invention according to claim 4, the sandwiching portion is composed of a hanging piece at the end of the upper horizontal frame and a vertical piece of the frame body that surrounds the outside of the reinforcing portion on the tip side of the upper horizontal frame, The gist of the invention is that a fastening screw for fixing the seat plate screw is provided on the vertical piece.

  According to the fourth aspect of the present invention, the pinching portion can sandwich the upper end of the balustrade by pressing the screw toward the outer surface side of the balustrade, and thereby the balustrade outer surface of the wall bearing support beam material. It can be ensured that the abutting parts are arranged in a vertical relationship on the outer surface of the same rail. Further, one of the sandwiching portions can be made strong by using one of the vertical vertical portions of the frame body surrounding the outer side of the reinforcing portion on the distal end side of the upper horizontal frame.

  The gist of the present invention described in claim 5 is that a plate plate having an L-shaped cross section is disposed inside the clamping portion so as to cover the inner side surface and the upper surface of the balustrade.

  According to the fifth aspect of the present invention, the plate plate acts as a reinforcing material, prevents the upper horizontal frame from being deformed at the junction with the upper end of the handrail, and acts as a protective material so that the handrail side is It can also prevent damage.

  As described above, the suspension scaffold of the present invention can be easily and quickly installed and removed by inserting the upper end of the railing such as a viaduct from the lower side and detachably sandwiching the upper end of the railing, The strength of the portion where the force is applied can be calculated sufficiently to support the load in a stable state.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of the suspended scaffolding of the present invention temporarily installed on a railway viaduct, and FIG. 2 is a front view of the same.

  The railway viaduct 1 will be described first. The rail 3 is erected with a thickness as a vertical wall from the end of the floor slab 2. In the illustrated example, the balustrade 3 is made of the same reinforced concrete as the floor slab 2, has a certain thickness, and the outer surface is an outer vertical side wall 3a.

  The suspended scaffold 4 of the present invention has a substantially U-shaped frame 5 in a side view constituting a part of the suspended scaffold 4 at a predetermined pitch (as an example, 1300 mm pitch) along the continuous direction of the outer vertical side wall 3a of the rail 3. They are juxtaposed and assembled integrally by means of horizontal and handrail materials 6a, 6b, 6c.

  The substantially U-shaped frame 5 in a side view is made of an aluminum alloy, and is a horizontal L-shaped upper horizontal frame 7 made of a square pipe, a hanging frame 8 connected to the tip side of the upper horizontal frame, and a lower portion of the hanging frame 8 The lower horizontal frame 9 protrudes horizontally in the direction of the viaduct 1 or the like, and a drooping piece 7a is provided vertically at the end of the upper horizontal frame 7 so as to form a horizontal L shape as a whole. Further, a rising frame 9 a that rises vertically is provided at the tip of the lower horizontal frame 9.

  By inserting the upper end of the rail 3 such as the viaduct 1 from the lower side into the end of the upper horizontal frame 7 and sandwiching the upper end of the rail 3 by the screw pressing to the outer vertical side wall 3a side of the rail 3 The clamping part 29 fixed to the upper end of the rail 3 was formed in the edge part. The upper horizontal frame 7 is laid horizontally on the rail 3 toward the outer side of the viaduct 1 or the like by the sandwiching portion 29.

  A suspension reinforcing portion 11 that constitutes a truss frame by laying a reinforcing frame 10 as an oblique member on the upper horizontal frame 7 and the hanging frame 8 with respect to a coupling corner between the tip portion of the upper horizontal frame 7 and the hanging frame 8. Formed.

  The clamping part 29 is constituted by a vertical piece 12 corresponding to the hanging piece 7a, and the vertical piece 12 is provided with a fastening screw 14 for fixing a seat plate screw in two upper and lower stages. The vertical piece 12 is configured as a part of a frame 13 that surrounds the outside of the suspension reinforcing portion 11 on the distal end side of the upper horizontal frame 7. The frame 13 includes an upper horizontal frame 7, a hanging frame 8, a vertical piece 12, and a frame connected to the vertical piece 12 with an angle.

  A plate plate 15 having an L-shaped cross section is disposed inside the clamping portion 29 so as to cover the inner surface and the upper surface of the rail 3. The plate plate 15 is attached to the upper horizontal frame 7 but may have the same diameter as the upper horizontal frame 7.

  A scaffolding board spanning bracket 16 is formed in the middle part of the hanging frame 8 toward the viaduct 1 side, and two aluminum scaffolding boards 17 are bridged over the scaffolding board spanning bracket 16. This scaffolding plate spanning bracket 16 is formed on the truss with a supporting beam member 16a that protrudes horizontally from the hanging frame 8 and a reinforcing frame 16b made of diagonal material, and the aluminum scaffolding plate 17 is prevented from falling off at the tip of the supporting beam member 16a. A rising piece 16c was provided.

  The wall-supporting support beam members 18 and 19 are projected from the middle of the hanging frame 8 toward the outer vertical side wall 3a side of the rail 3 at the upper and lower positions with the scaffolding plate bracket 16 interposed therebetween. A set screw 20 with a seating plate is provided at the tip of the wall bearing support beams 18 and 19 for adjustment.

  The lower horizontal frame 9 having an upright frame 9a that rises vertically at the distal end is long enough to lay four aluminum scaffolding plates 17 side by side on the vertical frame. The lower end protrudes downward, and the projecting piece 21a and the reinforcing piece 21b made of diagonal material form a reinforcing portion 21 made of a truss frame.

  Starting with the upper horizontal frame 7, the hanging frame 8, the lower horizontal frame 9, the scaffolding plate spanning bracket 16, the wall bearing support beams 18, 19 are all made of square pipes made of aluminum alloy (A6063-T5). However, the upper horizontal frame 7 is a hanger-type strength member having a diameter larger than that of the hanging frame 8 or the like, and supports the hanging frame 8 and below. As an example, the upper horizontal frame 7 is 100 × 50, and the hanging frame 8 is 100 × 40.

  FRP pipes were used for the lateral ground / handrail materials 6a, 6b, 6c, the lateral ground / handrail materials 6a, 6b were fixed by catch clamps 22, and the lateral ground / handrail materials 6c were fixed by orthogonal lamps 23. The height of the side ground / handrail material 6a is 80 cm from the scaffolding plate spanning bracket 16 for laying the aluminum scaffold plate 17, and the side ground / handrail material 6b is 80 cm from the lower horizontal frame 9 for laying the aluminum scaffold plate 17, and the rising frame 9a. Has a height of 80 cm, and the horizontal ground / handrail material 6c is provided at the upper end position thereof, thereby providing both the horizontal ground material and the handrail material.

  In FIG. 1, 24 is an anchor bolt, and 25 is a scaffold chain for locking one end to the anchor bolt 24, which is not indispensable to bear a suspension load, but is suspended to improve safety. In the example shown in the figure, the anchor bolt 24 is driven into the floor slab 2, the floor slab 2 is connected to the rising portion of the rising frame 9 a of the lower horizontal frame 9, and the anchor bolt 24 is driven into the inner surface of the rail 3. From here, it was made to rotate along the upper horizontal frame 7. However, it is not limited to this.

  In the figure, reference numeral 26 denotes a protective curing net, which is laid on the inside of the hanging frame 8 and the lower horizontal frame 9, but may be stretched outside.

  Next, installation and usage will be described. The suspended scaffold 4 of the present invention is installed to secure a scaffold when repairing, inspecting or cleaning the viaduct 1, and the viaduct 1 is attached to the sandwiching portion 29 of the frame material 5 that is substantially U-shaped in side view. The upper end of the rail 3 is inserted from the lower side, and the fastening screw 14 for fixing the seat plate screw is pressed and fixed to the outer vertical side wall 3a.

  At that time, a set screw 20 with a seating plate at the tip of the wall bearing support beams 18 and 19 is brought into contact with the outer vertical side wall 3a, and the side wall substantially supporting U-shaped frame material 5 of the wall bearing support beams 18 and 19 is formed. Prevents rotation and receives a load. The vertical accuracy of the hanging frame 8 is secured by adjusting the length of the set screw 20 with the seat plate.

  In this way, the frame material 5 having a substantially U-shaped side surface is juxtaposed at a predetermined pitch along the continuous direction of the outer vertical side wall 3a of the rail 3, and is integrally connected by the lateral ground / handrail materials 6a, 6b, 6c. And assemble.

  An aluminum scaffolding plate 17 is laid on the scaffolding plate spanning bracket 16 and the lower horizontal frame 9, and a protective curing net 26 is set.

  By the horizontal ground / handrail material 6a, 6b, 6c, the worker can work safely on the aluminum scaffolding plate 17. Raising and lowering to the aluminum scaffold plate 17 on the scaffold plate spanning bracket 16 is performed by a ladder (not shown).

  As shown in FIG. 3, the structural strength of the scaffold 4 of the present invention is to first suspend and support the hanging frame 8 and below with the upper horizontal frame 7 which is a hanger type thick member having a large diameter (1 In addition, the suspension support is structurally stabilized by the suspension reinforcing portion 11 at the tip of the upper horizontal frame 7 (2).

The material used is ^□ 80 × 40 × t25 except for the upper horizontal frame 7, and the upper horizontal frame 7 is ^□ 100 × 50 × t25.

この表でもわかるように、足場４を吊り支えするのに必要な荷重は、Ｆ２、Ｆ１、Ｆ３であり、Ｆ３の壁当て支承梁材１８から下方は支えられるだけのものである。 The load W (a, b, c, d) in FIG. 3 is as follows.

As can be seen from this table, the loads required to suspend and support the scaffold 4 are F2, F1, and F3, and only the lower part is supported from the wall bearing support beam 18 of F3.

  Thus, the suspension scaffold of the present invention can obtain a stable suspended support state by the three-point support of the clamping portion 29, the suspension reinforcing portion 11, and the wall-supporting support beam member 18.

It is a side view of the state temporarily installed in the railway viaduct of the suspension scaffold of this invention. It is a front view of the state temporarily installed in the railway viaduct of the suspension scaffold of this invention. It is intensity | strength explanatory drawing of the suspension scaffold of this invention. It is a side view of a prior art example. It is a X-ray arrow line view of FIG. It is a side view of another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Viaduct 2 ... Floor slab 3 ... High rail 3a ... Outer vertical side wall 4 ... Suspension scaffold 5 ... Frame 6a, 6b, 6c of side view substantially U-shaped side rail, handrail material 7 ... Upper horizontal frame 7a ... Drooping piece 8 ... Hanging frame 9 ... Lower horizontal frame 9a ... Upright frame 10 ... Reinforcement frame 11 ... Suspension reinforcement part 12 ... Vertical piece 13 ... Frame body 14 ... Fastening screw 15 ... Plate plate 16 ... Scaffold plate spanning bracket 16a ... Support beam material 16b ... Reinforcement frame 16c ... Upright piece 17 ... Aluminum scaffolding plates 18, 19 ... Wall bearing support beam material 20 ... Set screw with seat plate 21 ... Reinforcement part 21a ... Projection piece 21b ... Reinforcement piece 22 ... Catch clamp 23 ... Orthogonal ramp 24 ... Anchor bolt 25 ... Scaffold chain 26 ... Protective curing net 29 ... Nipping part

Claims (5)

The frame material that is substantially U-shaped on the side is a clamping part that is fixed to the upper end of the rail by inserting the upper end of the rail of the viaduct from the lower side and sandwiching the upper end of the rail by the screw pressing to the outer surface side of the rail And an upper horizontal frame that is horizontally laid on the railing in the outer direction such as a viaduct on the railing,
A hanging frame connected to the tip side of the upper horizontal frame;
It is composed of a lower horizontal frame that protrudes horizontally in the direction of viaduct etc. from the lower part of this hanging frame,
The upper horizontal frame is a hanger type member having a diameter larger than that of the hanging frame, and supports the hanging frame or less as a hanger type,
Forming a reinforcing reinforcement part by laying a reinforcing frame that constitutes the truss frame with respect to the joint corner between the tip of the upper horizontal frame and the hanging frame;
Furthermore, projecting the wall bearing support beam from the middle of the hanging frame with its tip facing the outer rail of the railing,
The frame material having a substantially U-shaped side surface is juxtaposed at a predetermined pitch along the continuous direction of the outer vertical side wall of the rail by sandwiching the upper end of the rail with the clamping part, and is integrally connected with a horizontal material, Over the scaffolding board on the lower horizontal frame,
A suspension scaffold characterized in that a supporting reaction force is obtained from the outer surface of the rail by using a wall bearing support beam material corresponding to the clamping performed by the clamping unit.   A scaffolding board spanning bracket is formed in the middle part of the hanging frame, and the wall-supporting beam from the middle of the hanging frame is projected in the vertical position across the scaffolding board spanning bracket, and the scaffolding board spanning bracket The suspension scaffold according to claim 1, which spans a board.   The suspension scaffold according to claim 1 or 2, wherein the horizontal ground material is attached at a predetermined height from the scaffold plate so as to also serve as a handrail material.   The clamping part is composed of a hanging piece at the end of the upper horizontal frame and a vertical piece of the frame body that surrounds the outer side of the reinforcing part on the distal end side of the upper horizontal frame. The suspension scaffold according to any one of claims 1 to 3, wherein a fastening screw is provided.   The suspended scaffolding according to claim 4, wherein a plate plate having an L-shaped cross section is disposed inside the holding portion so as to cover the inner side surface and the upper surface of the balustrade.

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