JP2018040169A - Scattering prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scattering prevention device capable of preventing scattering of a crushed object when disassembling a building, while being a simple structure.SOLUTION: A scattering prevention device 1 prevents scattering to a building external part of a crushed object generated when disassembling an existing building 20. This scattering prevention device 1 comprises a plurality of columns 30 for providing a framework scaffold 10 along an outer wall surface 21 of the existing building 20 having a protective barrier 90 and expandable in the vertical direction by being installed in the framework scaffold 10, an upper side wire 31 and a lower side wire 32 installed between the plurality of columns 30 and a protective net 33 held by the plurality of columns 30 and the wires 31 and 32. The columns 30 are arranged along a vertical member 111 for constituting the framework scaffold 10, and are temporarily fixed in a plurality of places to the vertical member 111. The protective net 33 is expanded up to below from an upper end height position of the protective barrier 90 of the framework scaffold 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a scattering prevention device that prevents scattering of crushed material generated during dismantling of an existing building to the outside of the building.

  2. Description of the Related Art Conventionally, in order to prevent scattering of crushed material that occurs when an existing building is dismantled, a protective net is provided so as to surround a portion of the existing building being dismantled.

  In Patent Literature 1, a plurality of extendable struts supported by a structural portion of an existing building and projecting upward along the side surface of the existing building, and a protective net that is held by the plurality of struts and covers the upper surface of the existing building And a scattering prevention device provided with these is proposed.

  In Patent Document 2, a plurality of extendable pedestal parts supported by a structural part of an existing building and projecting upward along the side surface of the existing building, and provided between the plurality of pedestal parts A scattering prevention device has been proposed that includes a vertical plane plate portion and a protective net that is held between the vertical plane plate portions and covers the upper surface of an existing building.

Japanese Patent Laying-Open No. 2015-70956 JP 2011-17230 A

  In the scattering prevention devices of Patent Documents 1 and 2, since the existing building is completely covered with a large protective net from the top, the load and moment applied to the column are actually considerably large. Therefore, there is a problem that it is necessary to ensure the rigidity of the support and the support becomes larger. In addition, there is a problem that the method of fixing the column becomes complicated because the column needs to be firmly fixed to the structure of the existing building to be dismantled and the temporary scaffolding around the existing building.

  The present invention provides a scattering prevention device that can be installed even on the outer wall surface of a building at an arbitrary height or in an arbitrary section while having a simple structure, and that can prevent scattering of crushed materials when the building is demolished. For the purpose.

The present inventors do not cover the entire upper part and the side of the dismantled part of the existing building with a protective net as a means for preventing scattering of the crushed material generated during the dismantling of the existing building, but the outer wall surface of the dismantled part of the existing building By extending the protective net only, it was possible to reliably receive crushed material during dismantling while limiting the protective range, and the scattering prevention device of the present invention was reached.
The feature of the present invention is that it is not necessary to install a protective net so as to cover the entire demolished part of an existing building, and it is sufficient to install a protective net only on the side of the demolished part, and a scattering prevention device can be constructed in a short time. In addition, even if the anti-scattering device is composed of a relatively lightweight support column and a protective net held by upper and lower wires, it is possible to receive crushed material generated when the existing building is dismantled.

  The anti-scattering device (for example, the anti-scattering device 1 described later) of the first invention is a anti-scattering device that prevents the crushed material generated during the dismantling of the existing building (for example, the existing building 20 described below) from scattering outside the building. A temporary scaffold (for example, a frame scaffold 10 described later) having a protective wall (for example, a protective wall 90 described later) on a side surface along an outer wall surface (for example, an outer wall surface 21 described later) of the existing building is provided. A plurality of struts (for example, struts 30 described later) that are attached to the temporary scaffold and can be expanded and contracted in the vertical direction, and wires (for example, an upper wire 31 that is described later, Side wires 32), a plurality of struts and a protection net (for example, protection nets 33 and 36 described later) held by the wires, and the struts are vertical members (for example, the temporary scaffolding, for example) See below The protective net is disposed along the straight member 111) and temporarily fixed to the vertical member at a plurality of locations. The protective net is a height position of a floor surface of the floor to be demolished of the existing building or a protective wall of the temporary scaffold. It is characterized by being extended to a position below the upper end height position.

According to the present invention, by holding the protective net on the support pillar and the wire, the protective net covers the side of the demolished part of the existing building, and the scattering of crushed materials during the demolishing of the building can be prevented. In addition, by arranging the anti-scattering device with support, wire, and protective net so as to cover only the side of the dismantling part, so much load and moment are not applied to the support, so the structure of the support can be simplified. As a result, it can be attached to a temporary scaffold rather than an existing building.
In addition, the protective net should be lower than the height of the floor of the floor to be demolished in the existing building or the height of the upper end of the protective wall provided on the side of the temporary scaffolding. By spreading the crushed material generated during the demolition of the existing building, it can be received by the protective net or the protective wall and kept on the site of the demolition work.

  In the anti-scattering device according to the second aspect of the invention, the support column has a plurality of cylindrical bodies (for example, an upper cylindrical body 41, a middle cylindrical body 42, and a lower cylindrical body 43, which will be described later) arranged in a nested manner to expand and contract. Possible column main body (for example, a column main body 40 described later), an annular upper annular member (for example, an upper annular member 50 described later) provided at the upper end of the column main body, and a lower end of the column main body. An annular lower annular member (for example, a lower annular member 70 described later), and the wire is inserted between adjacent upper annular members (for example, an upper wire 31 described later). ) And a lower wire (for example, a lower wire 32 to be described later) inserted between adjacent lower annular members, and the protective net includes the support pillars and the upper and lower wires. It is characterized by being extended between.

  According to the present invention, since the protection net is stretched between each support column and the upper and lower wires, the four sides of the rectangular protection net can be reliably supported by the support column or the wire. In addition, by extending the protective net between each support and the upper and lower wires, even if the crushed material generated during the dismantling of the existing building is a heavy object, the entire circumference of the protective net is constrained and the protective net is preliminarily provided. By introducing the tension into the protective net, the protective net exhibits resistance from the moment when the crushed material contacts the protective net, and the crushed material can be retained in the protective net.

  The temporary scaffold in the scattering prevention device of the third invention is a frame scaffold, and the column is attached to a vertical member (for example, a vertical member 111 described later) on the existing building side of the temporary scaffold and can be expanded and contracted. A column main body (for example, a column main body 40 to be described later) and an annular upper annular member (for example, an upper ring member 50 to be described later) provided at the upper end of the column main body, and the existing building of the temporary scaffold An annular outer annular member (for example, an outer annular member 34 to be described later) is attached to an upper end portion of the vertical member on the opposite side, and the wire is an upper wire inserted between adjacent upper annular members. (For example, an upper wire 31 to be described later) and an outer wire (for example, an outer wire 35 to be described later) inserted between adjacent outer annular members, and the protective net (for example, Guard net 36 below) is characterized in that it is stretched to be inclined with respect to the horizontal plane between the upper wire and the outer wire.

  According to the present invention, since the protective net is extended with an inclination between the upper wire and the outer wire, the protective net can reliably receive crushed material flying from above the temporary scaffold, and the existing building is demolished. Work can be carried out more safely. Further, since the protective net is inclined, the crushed material can be surely wiped down below the protective net.

  ADVANTAGE OF THE INVENTION According to this invention, scattering of the crushed material which generate | occur | produces at the time of building demolition can be prevented, although it is a simple structure.

It is a top view of the frame scaffold to which the scattering prevention device according to the first embodiment of the present invention is applied. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a side view of the support | pillar of the scattering prevention apparatus which concerns on the said embodiment. It is an enlarged view of the lower part of the support | pillar which concerns on the said embodiment, and CC sectional drawing. It is DD sectional drawing and EE sectional drawing of the support | pillar which concerns on the said embodiment. It is a longitudinal cross-sectional view of the frame scaffold with which the scattering prevention apparatus which concerns on 2nd Embodiment of this invention was applied. It is a front view of the frame scaffold concerning the embodiment. It is a top view of the outer side annular member of the scattering prevention apparatus which concerns on the said embodiment.

  The anti-scattering device of the present invention prevents scattering of crushed materials generated during building demolition by installing only a protective net or a protective net and protective wall on a frame scaffolding around the floor to be demolished of an existing building. . As shown in FIGS. 1 to 6, the first embodiment is such that a protective net is extended substantially vertically on a framework scaffold, and the second embodiment is a framework as shown in FIGS. The protective net is slanted and extended on the scaffold.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a plan view of a frame scaffold 10 as a temporary scaffold to which the scattering prevention device 1 according to the first embodiment of the present invention is applied. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB in FIG.
Among these, in FIG. 3, the frame scaffold 10 is indicated by a one-dot chain line for easy understanding.

  In this embodiment, the predetermined floor of the existing building 20 to be demolished is demolished as the demolishing target floor 22. A heavy machine 24 for dismantling is disposed on the floor surface 23 of the floor 22 to be dismantled. A frame scaffold 10 is provided around the existing building 20.

The frame scaffold 10 is provided along the outer wall surface 21 of the existing building 20 to be demolished. The frame scaffold 10 includes a building frame 11 that is stacked up and down, and a tread 12 and a brace 13 (not shown) that are installed between adjacent building frames 11. The building frame 11 is fixed to the outer wall surface 21 of the existing building 20 by a wall connection 14.
Among these, the building frame 11 includes a pair of vertical members 111 and a horizontal member 112 that connects the upper ends of the pair of vertical members.

  The anti-scattering device 1 prevents the crushed material generated when the existing building 20 is dismantled from being scattered outside the building. The scattering prevention device 1 includes a plurality of support columns 30 that are attached to the existing building 20 side of the frame scaffold 10 and can be expanded and contracted in the vertical direction, an upper wire 31 and a lower wire 32 that are installed between the plurality of support columns 30, And a protection net 33 held by a plurality of columns 30 and wires 31 and 32.

The protective net 33 is extended between each support column 30 and the upper and lower wires 31, 32 and extends substantially vertically along the outer wall surface 21 of the existing building 20.
The frame scaffold 10 is provided with a protective wall 90 along the outer side of the frame scaffold 10, that is, the side opposite to the existing building 20 side.
The protective wall 90 is configured by combining a plurality of rectangular soundproof panels and soundproof sheets, and extends above the floor surface 23 of the floor 22 to be demolished of the existing building 20.
Further, the lower end of the protective net 33 reaches below the height position of the upper end of the protective wall 90.

  In addition, the height of the upper end of the protective wall 90 is set lower than the floor surface 23 of the floor 22 of the existing building 20 to be demolished, and the protective net 33 is lowered below the floor surface 23 of the floor 22 of the demolishing target floor. It may be extended.

  FIG. 4 is a side view of the support column 30. 4A shows a state in which the support column 30 is extended, and FIG. 4B shows a state in which the support column 30 is contracted.

The support column 30 is disposed along the vertical member 111 on the existing building 20 side of the building frame 11 constituting the frame scaffold 10, and is temporarily fixed to the vertical member 111 of the building frame 11 at two upper and lower positions.
The column 30 is provided at an intermediate height between the column body 40 that can be expanded and contracted, an annular upper annular member 50 provided at the upper end of the column body 40, and the column body 40, and is temporarily fixed by being locked to the building frame 11. A possible locking member 60 and an annular lower annular member 70 which is provided at the lower end of the column main body 40 and can be temporarily fixed to the building frame 11 are provided.

The column main body 40 is configured such that a cylindrical upper cylindrical body 41, a middle cylindrical body 42, and a lower cylindrical body 43 are accommodated in a nested manner.
Through holes 44 and 45 are formed in the lower end portion of the upper cylindrical body 41 and the upper end portion of the middle cylindrical body 42, and by inserting a lock pin (not shown) into these through holes 44 and 45, The cylindrical body 41 is fixed in a state of protruding upward with respect to the middle cylindrical body 42.

  A hook 46 for binding an intermediate portion of the protective net 33 to the column main body 40 is provided at the upper end portion of the intermediate cylindrical body 42. By providing this hook 46, even if a strong wind acts on the protection net 33, the protection net 33 can be kept in close contact with the column main body 40 without the protection net 33 expanding to one side.

  Through holes 47 and 48 are formed in the lower end portion of the intermediate cylindrical body 42 and the upper end portion of the lower cylindrical body 43, and by inserting a lock pin (not shown) into these through holes 47 and 48, The cylindrical body 42 is fixed in a state of protruding with respect to the lower cylindrical body 43.

The upper annular member 50 is provided at the upper end of the upper cylindrical body 41. The upper annular member 50 includes a nut 51 that is welded and fixed to the upper end of the upper cylindrical body 41, and an eyebolt 52 that is screwed and fixed to the nut 51 by welding.
The upper wire 31 is inserted between the eyebolts 52 of the adjacent upper annular members 50.

Fig.5 (a) is an enlarged view of the lower part of the support | pillar 30, FIG.5 (b) is CC sectional drawing of Fig.5 (a). 6A and 6B are a DD sectional view and an EE sectional view of FIG.
The locking member 60 is provided at an intermediate height of the lower cylindrical body 43. The locking member 60 includes an extending piece 61 that extends in the horizontal direction from the lower cylindrical body 43, and a locking piece 62 that is provided on the extending piece 61 and locks to the horizontal member 112 of the building frame 11. . The column 30 is temporarily fixed to the building frame 11 by hooking the locking piece 62 of the locking member 60 onto the horizontal member 112 of the building frame 11 from above.

The lower annular member 70 is provided at the lower end of the lower cylindrical body 43.
The lower annular member 70 includes a U-shaped base 71 attached to the lower end of the lower cylindrical body 43, a lifting clamp 72 that can be attached to and detached from the vertical member 111 of the building frame 11, A bolt 73 provided on the clamp 72 and penetrating through the base 71 and the lower cylindrical body 43 and an eye nut 74 screwed into the bolt 73 are provided.
The lower wire 32 is inserted between the eye nuts 74 of the adjacent lower annular member 70.

  In the above-described support column 30, the lock pins inserted into the through holes 44 and 45 of the upper cylindrical body 41 and the middle cylindrical body 42 are removed from the extended state of FIG. By pulling out the lock pins inserted into the through holes 47 and 48 of the cylindrical body 43, the contracted state of FIG.

According to this embodiment, there are the following effects.
(1) By holding the protection net 33 on the support column 30 and the wires 31 and 32, the protection net 33 covers the side of the floor 22 to be demolished of the existing building 20, and can prevent scattering of crushed materials during the building demolition. . Moreover, since only a side of the floor 22 to be demolished is covered, the column 30 is not subjected to a large load or moment, so that the structure of the column 30 can be simplified. As a result, it is attached to the frame scaffold 10 instead of the existing building 20. Can do.

  (2) Since the protection net 33 is extended between the support column 30 and the upper and lower wires 31 and 32, the protection net 33 can be reliably supported by the support column 30 and the wires 31 and 32.

  (3) By loosening the nut of the lifting clamp 72 of the lower annular member 70, the lifting clamp 72 can be slid along the vertical member 111 of the building frame 11 and the column 30 can be easily raised or Can be lowered.

  (4) The protective net 33 is extended so that the lower end of the protective net 33 is below the height position of the upper end of the protective wall 90 provided on the side surface of the frame scaffold 10. Therefore, the crushed material generated at the time of dismantling of the existing building 20 is received by the protective net 33 or the protective wall 90, and the crushed material can be reliably prevented from scattering.

[Second Embodiment]
FIG. 7 is a longitudinal sectional view of the frame scaffold 10 to which the scattering prevention device 1A according to the second embodiment of the present invention is applied. FIG. 8 is a front view of the framework scaffold 10.
In the present embodiment, the position and posture of the protection net 36 are different from those of the protection net 33 of the first embodiment.

  The anti-scattering device 1 </ b> A is attached to the existing building 20 side of the framework scaffold 10, a plurality of support columns 30 that can be expanded and contracted in the vertical direction, an upper wire 31 laid between the plurality of support columns 30, and an existing building of the framework scaffolding 10. 20, a plurality of annular outer annular members 34 attached to the opposite side of 20, an outer wire 35 laid between the plurality of outer annular members 34, and a protective net 36 held by the upper wire 31 and the outer wire 35. .

  The protective net 36 is extended between the upper wire 31 and the outer wire 35 while being inclined with respect to the horizontal plane, and extends along the outer wall surface 21 of the existing building 20. The outer wire 35 is provided along the horizontal member 112 of the frame scaffold 10, and the protective net 36 extended between the upper wire 31 and the outer wire 35 is in close contact with the horizontal member 112 without any gap. Thus, the crushed material can be reliably received by the protective net 36.

FIG. 9 is a plan view of the outer annular member 34.
The outer annular member 34 is attached to the upper end portion of the vertical member 111 on the side opposite to the existing building 20 of the frame scaffold 10. The outer annular member 34 includes a clamp 80 that can be attached to and detached from the vertical member 111 of the building frame 11, a bolt 81 provided on the clamp 80, and an eye nut 82 that is screwed to the bolt 81. The outer wire 35 is inserted between the eye nuts 82 of the adjacent outer annular members 34.

According to this embodiment, in addition to the effects (1) to (4) described above, the following effects can be obtained.
(5) Since the protective net 36 is stretched between the upper wire 31 and the outer wire 35, the protective net 36 can reliably catch crushed material flying from above onto the frame scaffold 10 and Dismantling work can be carried out more safely.
Since the tread 12 is provided for each layer of the frame scaffold 10, the crushed material received by the scattering prevention device 1 </ b> A can be received by the tread 12, and the crushed material can be reliably prevented from flying.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the first embodiment, the protective net 33 is extended substantially vertically to the existing building 20 side of the frame scaffold 10, and in the second embodiment, the protective net 36 is inclined to the opposite side of the frame scaffold 10 from the existing building 20. However, it is not limited to this. For example, the protective nets 33 and 36 may be provided by combining the first embodiment and the second embodiment.
In this way, by providing the protective nets 33 and 36 in a double manner and increasing the resistance force of the protective nets 33 and 36, scattering of crushed materials generated at the time of building demolition without newly providing means for preventing scattering. Can be reliably prevented.

  In each of the above-described embodiments, the protective wall 90 is provided outside the frame scaffold 10. However, the present invention is not limited to this, and the protective wall may be provided inside the frame scaffold 10, that is, on the existing building 20 side.

DESCRIPTION OF SYMBOLS 1, 1A ... Scatter prevention device 10 ... Frame scaffold (temporary scaffolding) 11 ... Building frame 12 ... Footboard 13 ... Bracing 14 ... Wall connection 20 ... Existing building 21 ... Outer wall surface 22 ... Demolition object floor 23 ... Floor of dismantling object floor Surface 24 ... Demolition hoist 30 ... Post 31 ... Upper wire 32 ... Lower wire 33, 36 ... Protective net 34 ... Outer annular member 35 ... Outer wire 40 ... Post body 41 ... Upper cylindrical body 42 ... Middle cylindrical body 43 ... Lower cylindrical body 44 ... Through hole 45 ... Through hole 46 ... Stopper 47 ... Through hole 48 ... Through hole 50 ... Upper annular member 51 ... Nut 52 ... Eye bolt 60 ... Locking member 61 ... Extending piece 62 ... Locking piece DESCRIPTION OF SYMBOLS 70 ... Lower side annular member 71 ... Base 72 ... Clamp for lifting 73 ... Bolt 74 ... Eye nut 80 ... Clamp 81 ... Bolt 82 ... Eye nut 90 ... Protection wall 111 ... Vertical member 112 ... Horizontal Wood

Claims (3)

An anti-scattering device that prevents the crushed material generated during the dismantling of an existing building from scattering outside the building,
A temporary scaffold having a protective wall on the side surface along the outer wall surface of the existing building is provided,
A plurality of struts attached to the temporary scaffold and extendable in the vertical direction;
A wire constructed between the plurality of columns;
A plurality of struts and a protective net held by the wire,
The support column is disposed along a vertical member constituting the temporary scaffold, and is temporarily fixed to the vertical member at a plurality of locations.
The anti-scattering device, wherein the protective net is extended from a height position of a floor surface of a floor to be demolished of the existing building or a height position of an upper end of a protective wall of the temporary scaffold. The column is provided with a column body in which a plurality of cylindrical bodies are arranged in a telescopic manner, an annular upper annular member provided at an upper end portion of the column body, and a lower end portion of the column body. An annular lower annular member, and
The wire includes an upper wire inserted between adjacent upper annular members, and a lower wire inserted between adjacent lower annular members,
The scattering prevention device according to claim 1, wherein the protective net is stretched between the support columns and the upper and lower wires. The temporary scaffold is a framework scaffold,
The strut includes a strut body attached to the vertical member on the existing building side of the temporary scaffold and capable of expanding and contracting, and an annular upper annular member provided at the upper end of the strut body,
An annular outer annular member is attached to the upper end of the vertical member opposite to the existing building of the temporary scaffold,
The wire includes an upper wire inserted between adjacent upper annular members, and an outer wire inserted between adjacent outer annular members,
The scattering prevention device according to claim 1, wherein the protective net is extended with an inclination with respect to a horizontal plane between the upper wire and the outer wire.

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