JP2019173268A - Fall prevention device - Google Patents

Abstract

To more reliably receive a falling article.SOLUTION: A fall prevention device 20 comprises multiple support frames 21P tiltedly attached upward toward outside from a prefabricated scaffolding surrounding a building and a sheet material 30 set between the support frames 21P. The sheet material 30 has a sheet base part 31 arranged over the support frames 21P, and each of parts corresponding to the support frames 21P at the sheet base part 31 is provided with a support edge part 31a attached to the support frames 21P and a cover part 32 having a length extended over the support edge part 31a from a part inner side from the support edge part 31a at the sheet base part 31 and arranged to cover an upper part of the support edge part 31a attached to the support frames 21P.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an apparatus for preventing an article from dropping at a construction site or a demolition site.

  In building construction sites and demolition sites, it is common to attach a fall prevention device to the outside of surrounding members such as a frame scaffolding and a protective wall provided so as to surround the periphery. For example, in Patent Document 1, a plurality of panels are arranged so as to be directed upward toward the outer side to constitute a fall prevention device. As the panel, a panel constituted by supporting an endless sheet material on a frame is applied. At the site where such a fall prevention device is installed, for example, even if an article is accidentally dropped from the height of the frame scaffolding, it will be received on the way by the panel, and it can be prevented from falling to the ground It becomes.

Utility Model Registration No. 3194130

  By the way, in the above-mentioned fall prevention device, in order to prevent damage due to mutual contact of the panels, a gap is provided between the frame members constituting the frame of the panel. Also, in other fall prevention devices, a gap may be generated between the panels unintentionally depending on the situation at the site. As described above, when there is a gap in the fall prevention device, it effectively functions for an article having a size larger than the gap, but an article having a size smaller than the gap cannot be received by the panel. Can occur.

  An object of this invention is to provide the fall prevention apparatus which can receive a fall article more reliably in view of the said situation.

  In order to achieve the above object, a fall prevention device according to the present invention includes a plurality of structural members that are attached so as to be inclined upward from a surrounding member that surrounds a building, and the structural members. A fall prevention device configured to receive a dropped article by the sheet material, wherein the sheet material includes a sheet base portion disposed between the structural materials, and the sheet Each of the portions corresponding to the structural material in the base extends beyond the support edge from a support edge attached to the structural material and a portion of the sheet base that is inside the support edge. A cover portion having a length and arranged to cover an upper surface of a support edge portion attached to the structural material is provided.

  According to the present invention, when the sheet material is attached to the structural material such as the frame material via the support edge portion, the cover portion extending beyond the support edge portion is disposed so as to cover the upper portion thereof. Therefore, even when a gap exists between the sheet material and the structural material, the gap can be covered by the cover portion, and an article having a size smaller than the gap can be reliably received by the sheet material.

  Further, the present invention provides the above-described fall prevention device, wherein the support edge portion is provided with a plurality of insertion holes through which a binding member for connecting the structural material is inserted, and the cover portion includes An insertion hole through which the binding member is inserted is provided at least at both corners of the extended edge portion.

  According to this invention, since the support edge portion of the sheet base and the structural member are connected by the binding member inserted through the insertion hole, the dimensional error is absorbed by the length of the binding member. This makes it possible to improve the efficiency of attaching the sheet material.

  Moreover, the present invention is characterized in that, in the above-described fall prevention device, an attachment portion that is attached to a reinforcing structural member is provided on the back surface of the sheet base portion.

  According to this invention, the structural material for reinforcement is inserted into the mounting portion, so that the sheet material is disposed in a portion where the mutual space between the structural materials is large, or the sheet material is disposed outside the protruding corner portion. Even in this case, it is possible to sufficiently secure the respective attachment strengths.

  In the fall prevention device according to the present invention, the attachment portion includes a support piece portion having two open edge portions on the back surface of the sheet base portion, and connects the two open edge portions of the support piece portion to each other. It is comprised by cylinder shape, A structural material is penetrated inside a cylinder, It is characterized by the above-mentioned.

  According to this invention, if the opening edge part of a support piece part is mutually connected in the state which has arrange | positioned the structural material for reinforcement between the open edge parts of a support piece part, it will be in the state by which the structural material was penetrated by the attachment part. . Therefore, it is possible to improve the efficiency of attaching the sheet material.

  Moreover, the present invention is characterized in that, in the fall prevention device described above, an extension attachment portion for detachably attaching an extension sheet material is provided on the extended edge portion of the cover portion.

  According to this invention, it is possible to attach an extension sheet material to the extended edge part of a cover part. Therefore, even when there is a large gap between the structural material of the sheet material, it can be covered by attaching the extension sheet material, and the article can be received more reliably regardless of the situation at the site. Become.

  According to the present invention, when the sheet material is attached to a structural material such as a frame material via the support edge portion, the cover portion extending beyond the support edge portion is disposed so as to cover the upper portion thereof. Therefore, even when a gap exists between the sheet material and the structural material, the gap can be covered by the cover portion, and an article having a size smaller than the gap can be reliably received by the sheet material.

It is a perspective view which shows the principal part of the frame scaffold which is a peripheral member to which the fall prevention apparatus which is embodiment of this invention is applied. It is a principal part top view of the frame scaffold shown in FIG. 1, and a fall prevention apparatus. It is a principal part side view of the frame scaffold shown in FIG. 1, and a fall prevention apparatus. It is the figure which looked at the sheet | seat material and extension sheet | seat material which are applied to the fall prevention apparatus shown in FIG. 1 from the back surface side. It is the principal part conceptual diagram which looked at the fall prevention apparatus shown in FIG. 1 from the outer peripheral side. It is the conceptual diagram which showed the principal part of FIG.

Hereinafter, preferred embodiments of a fall prevention device according to the present invention will be described in detail with reference to the accompanying drawings.
1 and 2 show a fall prevention device according to an embodiment of the present invention. The fall prevention device illustrated here is applied to the outside of a frame scaffold (peripheral member) 10 provided so as to surround the periphery of a building at a building demolition site. The frame scaffold 10 is constructed by providing treads 14 in a layered manner with respect to a framework constituted by a plurality of struts 11, girders 12, braces 13, and other structural materials.

  The fall prevention device 20 is provided at a height corresponding to the footboard 14 on the second floor or the third floor, for example, with respect to the frame scaffold 10 and includes a support frame (structural material) 21. As shown in FIG. 3, the support frame 21 is provided so as to protrude outward from the support column 11 disposed on the outer peripheral side of the frame. In the present embodiment, the lower bracket 22 is fixed at substantially the same height as the tread plate 14, and the lower bracket 22 supports the base end portion of the support frame 21. The distal end portion of the suspension frame 23 is connected to the distal end portion of the support frame 21. The suspension frame 23 extends outward from an upper bracket 24 that is fixed at substantially the same height as the footboard 14 that is the upper floor in the column 11. As is apparent from the drawing, the dimension along the length of the suspension frame 23 is appropriately adjusted so that the support frame 21 is gradually inclined upward toward the outside.

  As shown in FIGS. 1 and 2, a fall prevention device 20 is configured by arranging a plurality of footboards 14 </ b> P above the support frame 21 at a portion where the frame scaffold 10 extends linearly. That is, the support frames 21 are covered with each other by spanning a plurality of the step plates 14P so as to be parallel to the step plate 14 serving as a scaffold with respect to the adjacent support frames 21. The foot board 14P applied as the fall prevention device 20 is the same as the foot board 14 serving as a scaffold.

  On the other hand, by providing a sheet material 30 between the two support frames (hereinafter referred to as the protruding corner frame 21P when distinguished) attached to the column 11P of the protruding corner at the portion that becomes the protruding corner of the frame scaffold 10 A fall prevention device 20 is configured. The two protruding corner frames 21 </ b> P extend outward with a central angle of approximately 90 ° between the pillars 11 as a center and securing a central angle of 90 ° therebetween.

  The sheet material 30 is a flexible face material configured in a mesh shape with a resin such as polyester. As the sheet material 30, it is preferable to apply a material having as fine a mesh stitch as possible. As shown in FIG. 4, the sheet material 30 includes a sheet base portion 31 and two cover portions 32. The sheet base 31 is bridged between the protruding corner frames 21P, and is configured such that the outer shape is a square shape. More specifically, the sheet base portion 31 has two support edge portions 31a having an acute angle a and an outer peripheral edge portion 31b having an obtuse angle b. It is configured to be substantially line symmetric with respect to a diagonal line connecting the angles a and b. The length of the support edge portion 31 a is set to be substantially equal to the entire width of the plurality of footboards 14 spanned over the support frame 21.

  As shown in FIGS. 4 and 5, the cover portion 32 has a rectangular shape having a long side substantially the same length as the support edge portion 31 a. The cover portion 32 is welded to a portion where the base end edge portion along the length is on the inner side of the support edge portion 31a on the surface of the sheet base portion 31, and the front end edge exceeds the support edge portion 31a. Extends outside. At one end edge of each cover portion 32, one element 33a of an extension slide fastener (extension attachment portion) 33 is attached, and insertion holes 32a are provided at both corners. The extension slide fastener 33 is paired with the other element 33a provided at the edge of the rectangular extension sheet member 34, and the extension sheet member 34 provided with the other element 33a is detachably attached. Is possible. The insertion hole 32 a is a so-called eyelet in which a metal ring is mounted around a hole that penetrates the cover portion 32.

  As is apparent from the figure, the seat base 31 is formed with a plurality of insertion holes 31c in the respective support edge portions 31a, and the attachment portions 35 are provided on the diagonal portions which are the above-described line-symmetric axes on the back surface. It is provided. The insertion hole 31 c is an eyelet having a metal ring mounted around the hole, like the insertion hole 32 a provided in the cover portion 32. The mutual intervals of the plurality of insertion holes 31c may be equal intervals, or may be provided so as to be unequal intervals. The attachment portion 35 is a cylindrical portion through which the support frame 21 is inserted. In the present embodiment, the attachment portion 35 is configured by providing a rectangular support piece portion 35 a on the back surface of the sheet base portion 31. The support piece 35a is attached so that the diagonal line is long, and is provided with a connecting slide fastener 35b at a portion extending over almost the entire length of the two open edges that are the long sides. The slide fastener 35b for connection connects the open edge part of the support piece part 35a so that attachment or detachment is mutually possible. When the open edge portions of the support piece portions 35 a are connected to each other by the connecting slide fastener 35 b, the cylindrical attachment portion 35 is configured on the back surface of the sheet base portion 31.

  In order to arrange the sheet material 30 between the protruding corner frames 21P, first, as shown in FIG. 1, a reinforcing support frame 21Q is added to the column 11P at the protruding corner. The support frame to be added (hereinafter, simply referred to as a reinforcing support frame 21Q) has the same configuration as that of the protruding corner frame 21P, and is arranged with respect to the column 11P in a state where it is disposed at a position intermediate to the protruding corner frame 21P. Install. That is, the base end portion of the reinforcing support frame 21Q is connected to the lower bracket 22 of the column 11P, the tip end portion of the suspension frame 23Q is connected to the tip end portion of the reinforcement support frame 21Q, and the base of the suspension frame 23Q is further connected. The end is connected to the upper bracket 24 of the column 11P.

  Next, the sheet material 30 is disposed on the reinforcing support frame 21Q in a state where the back surface of the sheet base 31 is directed downward and the acute angle a is on the side of the column 11P at the protruding corner, and the supporting edge 31a is positioned on the protruding corner frame 21P. And the reinforcing support frame 21Q is inserted through the attachment portion 35.

  To connect the support edge 31a to the protruding corner frame 21P, as shown in FIG. 5, the binding member 40 is passed through the insertion hole 31c provided in the support edge 31a and surrounds the protruding corner frame 21P. What is necessary is just to arrange | position sequentially. As the binding member 40, a string-like member made of fibers may be applied, or a member formed of resin or metal may be used. It is preferable to add a bundling member 40 that connects the column 11 to the insertion hole 31c adjacent to the column 11P at the protruding corner. When the binding member 40 is disposed, if the cover portion 32 is folded back to the front surface side of the sheet base portion 31, the support edge portion 31a is exposed upward, so that the work can be easily performed. After the binding member 40 is disposed, the cover 32 covers the gap between the seat base 31 and the adjacent footboard 14P by covering the upper portion of the support edge 31a with the cover 32. It becomes. After the upper portion of the support edge 31a is covered by the cover portion 32, the cover portion 32, the support column 11 and the girder 12 are inserted by the bundling members 40 inserted into the insertion holes 32a at both corners so that the cover portion 32 is not rolled up. The support frame 21 is preferably connected.

  To make the reinforcing support frame 21Q inserted through the attachment portion 35, as shown in FIG. 6, the reinforcing support frame 21Q is disposed on the support piece portion 35a released from the connection state by the connecting slide fastener 35b. Then, when the open edges are connected to each other by the connecting slide fastener 35b, the state shown in FIG. 5 is obtained.

  As shown in FIGS. 1 and 2, in the present embodiment, an extension sheet material 34 is connected to one cover portion 32, and the extension sheet material 34 covers the gap between the protruding corner frame 21P and the tread plate 14P. I have to. In the illustrated example, an extension sheet material 34 having insertion holes 34a through which the binding members 40 can be inserted at both corners is applied. Accordingly, it is preferable that the extension sheet material 34 is also connected to the support column 11, the beam 12, and the support frame 21 by the binding member 40 inserted through the insertion hole 34 a.

  In the fall prevention device 20 configured as described above, the sheet material 30 is disposed outside the portion serving as the projecting corner of the frame scaffold 10 so as to be continuous with the tread plate 14P provided in the linear portion. That is, the tread 14P and the sheet material 30 are arranged on the frame scaffold 10 so as to surround the outside by the support frame 21. As a result, even if an article is accidentally dropped on the frame scaffold 10 above the sheet material 30, it will be received by the footboard 14P or the sheet material 30, and the situation of falling to the ground can be prevented. it can. In addition, a cover portion 32 is provided so as to cover the support edge portion 31a of the sheet material 30, and the cover portion 32 covers the connection portion between the support edge portion 31a and the protruding corner frame 21P. Therefore, even if a gap is generated between the support edge portion 31a of the sheet material 30 and the protruding corner frame 21P, it is possible to prevent the article from falling downward from the gap.

  In the above-described embodiment, the fall prevention device 20 is provided on the second or third floor of the frame scaffold 10, but the number of floors on which the support frame 21 is installed is not limited to this, and other floors It may be provided in a plurality of layers. Moreover, although the fall prevention device 20 using the sheet material 30 is applied only to the outside of the protruding corner portion, it may of course be applied to a straight portion constituted by the tread plate 14. In this case, a rectangular material may be applied as the sheet material 30, and the sheet material 30 can be used in combination with the tread board 14. In the above-described embodiment when the sheet material 30 is disposed outside the protruding corner portion, the protruding corner frames 21P are illustrated as being 90 ° to each other, but the included angle of the protruding corner frame 21P is not necessarily limited. It need not be 90 °. Furthermore, as the sheet material 30, a mesh-shaped material molded by a resin is illustrated, but the sheet material 30 is not necessarily limited to this, and may be a film having a desired strength. In this case, the sheet base 31 and the cover 32 do not necessarily have the same configuration. Furthermore, the sheet material 30 is arranged between the support frames 21P arranged at the protruding corners, but the sheet material may be arranged on the frame.

  Further, in the above-described embodiment, the reinforcing support frame 21Q is provided between the support frames 21, so that the attachment strength of the sheet material 30 can be ensured even when the spacing between the support frames 21 is large. Although possible, it is not always necessary to provide the reinforcing support frame 21Q. Since the attachment portion 35 of the reinforcing support frame 21Q is formed by connecting the open edge portions to each other, the sheet material 30 is supported by the reinforcing support frame 21Q. Although work becomes easy, it is not necessarily limited to this, As the attachment part 35, what was simply comprised by the cylinder shape may be applied.

  Further, in the above-described embodiment, since the binding member 40 is connected to the support frame 21, a dimensional error can be absorbed by the length of the binding member 40, and the sheet material 30 can be attached. Work can be facilitated. However, it is not necessary to connect the support frame 21 with the binding member 40.

  DESCRIPTION OF SYMBOLS 10 Frame scaffolding, 20 Fall prevention device, 21 and 21P Projection corner frame, 21Q Support frame for reinforcement, 30 Sheet material, 31 Sheet base part, 31a Support edge part, 31c Insertion hole, 32 Cover part, 33 Slide fastener for extension, 34 Extension sheet material, 35 mounting part, 35a support piece part, 40 binding member

Claims (5)

A plurality of structural members that are attached in an inclined state so as to be directed upward from the surrounding members that surround the periphery of the building, and a sheet material that is provided between the structural members, the article falling by the sheet material A fall prevention device adapted to receive
The sheet material includes a sheet base portion disposed between the structural materials,
Each of the portions corresponding to the structural material in the seat base includes a support edge attached to the structural material, and a portion extending inward from the support edge in the seat base beyond the support edge. A fall prevention device, comprising: a cover portion having a length that exists, and arranged to cover an upper surface of a support edge portion attached to the structural member.   The support edge is provided with a plurality of insertion holes through which a binding member for connecting to the structural material is inserted, and the cover part has at least both corners of the extended edge part. The fall prevention device according to claim 1, further comprising an insertion hole through which the binding member is inserted.   The fall prevention device according to claim 1, wherein an attachment portion that is attached to a structural member for reinforcement is provided on a back surface of the sheet base portion.   The mounting portion includes a support piece portion having two open edge portions on the back surface of the sheet base portion, and is configured in a cylindrical shape by connecting the two open edge portions of the support piece portion to each other. The fall prevention device according to claim 3, wherein a structural material is inserted inside.   The fall prevention device according to claim 1, wherein an extension attachment portion for detachably attaching an extension sheet material is provided on an extended edge portion of the cover portion.