JP7580127B2 - Suspended scaffolding - Google Patents

Description

This disclosure relates to suspended scaffolding that is used, for example, while suspended from various buildings, etc.

A typical suspended scaffold is constructed by arranging beam members made of multiple pipes in parallel and hanging them from various buildings, placing cross members between the beam members, and placing flooring that will serve as a work floor on top of the cross members.

For example, the suspended scaffolding disclosed in Patent Document 1 comprises multiple beam units arranged parallel to one another and scaffolding panels that are spanned between the beam units. The beam units are constructed by connecting multiple main body parts in the longitudinal direction. The main body parts have a truss structure made up of a pair of left and right upper chord members that extend horizontally, a pair of left and right lower chord members that extend horizontally below the left and right upper chord members, and multiple diagonal members that are spanned between the upper chord members and the lower chord members.

The suspended scaffolding of Patent Document 1 allows an extension beam unit to be connected to an existing beam unit. When connecting an extension beam unit to an existing beam unit, a scaffolding panel is installed on the existing beam unit, and then the extension beam unit is placed along the edge of the scaffolding panel and connected to the tip of the existing beam unit with a connecting pin. The extension beam unit is then rotated around the connecting pin and placed in series on the extension line of the existing beam unit, and then fixed with a fixing pin. After fixing the extension beam unit, a scaffolding panel is installed on top of the extension beam unit. A suspended scaffolding that allows the scaffolding to be expanded in sequence while the existing beam unit is suspended in this way is called a pre-floor construction type suspended scaffolding.

Utility Model Registration No. 3223667

The suspended scaffolding of Patent Document 1 requires the installation of multiple large beam units with a truss structure in which four chord members are connected by multiple diagonal members, making the suspended scaffolding itself large-scale. For example, in places with few obstacles in the surrounding area, such as bridges and large-space buildings, a large beam unit like that of Patent Document 1 is not thought to pose any particular problem. However, in the case of buildings with multiple pipes that are intricately intertwined, such as plants, it can be difficult to install multiple large beam units like that of Patent Document 1 around the surrounding area.

In particular, in the beam unit of the truss structure of Patent Document 1, a pair of upper chord members are spaced apart in the left-right direction, and a pair of lower chord members are similarly spaced apart, so the left-right dimension of each beam unit is long. If the left-right dimension of a beam unit is long, the probability of interference with pipes, etc. increases accordingly, making it difficult to freely construct the suspended scaffolding.

In addition, the truss-structured beam unit in Patent Document 1 has four chord members connected by multiple diagonal members, which means that each member is heavy and requires a lot of work to transport and install. In the case of a pre-floor-construction type suspended scaffold, the work of connecting the extension beam unit to the existing beam unit must be done on the existing scaffold panel, and there is a concern that the increased weight of the beam unit will worsen the workability when connecting the extension beam unit.

On the other hand, depending on the type of work, etc., it may not be a problem if the strength is not as strong as that of a beam unit consisting of four chord members and multiple diagonal members as in Patent Document 1, and there are cases where a component that can be used to construct a compact suspended scaffolding is desired.

This disclosure has been made in consideration of these points, and its purpose is to provide a suspended scaffold that uses lightweight materials, has a high degree of freedom, is compact, and has high strength against horizontal external forces.

In order to achieve the above object, in the first aspect of the present disclosure, a suspended scaffolding can be provided that includes a plurality of deck beams connected to form a rectangular shape in a plan view, a panel material that is installed on the deck beams and forms a work floor, and a suspension member that suspends the deck beam from a building. The deck beam includes an upper pipe material extending horizontally, a lower pipe material that is arranged below and away from the upper pipe material and extends parallel to the upper pipe material, and a connecting member that is fixed to the upper pipe material and the lower pipe material and connects the upper pipe material and the lower pipe material, and the upper pipe material and the lower pipe material are arranged so that they are not aligned in the left-right direction perpendicular to the longitudinal direction of the deck beam in a plan view. The deck beam includes a pair of deck beams that are arranged to face each other. Furthermore, the suspended scaffolding also includes a reinforcing member that connects the pair of deck beams.

This configuration allows a suspended scaffold to be systemized using multiple deck beams and panel materials, significantly reducing the time required to construct compared to conventional single-tube suspended scaffolding. In addition, since the upper and lower pipe materials that make up the deck beam are not aligned in a direction perpendicular to the longitudinal direction of the deck beam in a plan view (the left-right direction of the deck beam), the left-right dimension of the deck beam is significantly shorter than that of the truss-structured beam unit of Patent Document 1.

By shortening the left-right dimensions of the deck beam, the probability of interference with pipes is reduced when constructing suspended scaffolding in a building with multiple, intricately intertwined pipes, such as a plant, and the freedom to construct the suspended scaffolding is improved.

In addition, the fact that the pipes are not lined up on the left and right side of the deck beam means that the number of components that make up the deck beam is reduced, making the deck beam lighter. Furthermore, the upper and lower pipes that make up the deck beam are connected with a gap between them in the vertical direction, ensuring that the deck beam has sufficient strength.

In addition, the deck beam is lightweight, making it easy to transport and install. For example, when constructing a pre-floor construction type suspended scaffolding, the deck beam of this configuration is connected to an existing deck beam that has been suspended in advance as an extension deck beam, and in this case, the extension deck beam is lightweight, making it easy to work with.

In addition, conventional wooden scaffolding boards, steel scaffolding boards, antis (cloth frames with boards), etc. can be installed as panel materials on the upper and lower pipe materials. Also, cloth materials for system scaffolding can be connected to any position on the upper and lower pipe materials, so there is a high degree of freedom even though it is a systemized suspended scaffold.

In addition, because a pair of deck beams arranged opposite each other are connected by reinforcing members, the relative positions of the two deck beams are less likely to shift, especially when a horizontal external force is applied, resulting in high strength.

The reinforcing member according to the second aspect of the present disclosure includes a first reinforcing member and a second reinforcing member. The first reinforcing member and the second reinforcing member are arranged so as to intersect with each other in a plan view. One end of the first reinforcing member and one end of the second reinforcing member are connected to a portion of one of the pair of deck beams that is spaced apart in the longitudinal direction, and the other end of the first reinforcing member and the other end of the second reinforcing member are connected to a portion of the other of the pair of deck beams that is spaced apart in the longitudinal direction.

With this configuration, the first reinforcing member and the second reinforcing member function as diagonal braces, providing even greater strength against horizontal external forces.

In a third aspect of the present disclosure, the upper pipe material or the lower pipe material is provided with a fixing pin extending upward, and fixing holes through which the fixing pin is inserted are formed at both ends of the reinforcing member.

With this configuration, after both ends of the reinforcing member are positioned above the fixing pin, the fixing pin can be inserted into the fixing hole by moving it downward. This makes it easy to connect the reinforcing member to the deck beam.

In a fourth aspect of the present disclosure, the fixing pin extends upward from the upper portion of the lower pipe material, and the upper end of the fixing pin is spaced downward from the lower portion of the upper pipe material.

In a fifth aspect of the present disclosure, a scaffolding board is provided that is attached to the upper pipe material. With this configuration, since there is no need to provide a fixing pin on the upper pipe material, the scaffolding board can be installed at any position on the upper pipe material, increasing the freedom of installation of the scaffolding board. In addition, since the upper end of the fixing pin is spaced downward from the lower part of the upper pipe material, the end of the reinforcing member can be easily inserted between the fixing pin and the upper pipe material, and the fixing pin can be easily inserted into the fixing hole.

The fixed pin according to the sixth aspect of the present disclosure comprises a pin body fixed to the upper part of the lower pipe material and extending upward, and a locking member. The pin body is provided with a housing portion in which the locking member is housed at a portion spaced upward from the lower end of the pin body, and a support shaft is provided above the housing portion in the pin body to support the upper side of the locking member so that it can rotate freely around a horizontal axis. The pin body is provided with a biasing member that biases the lower side of the locking member in a direction that protrudes radially outward from the housing portion of the pin body.

According to this configuration, when the fixing pin is inserted into the fixing hole of the reinforcing member, the locking member is accommodated in the accommodation portion, so that the locking member does not get in the way and can be easily inserted. On the other hand, when the fixing pin is completely inserted into the fixing hole, the locking member protrudes from the accommodation portion radially outward from the pin body, so that when the reinforcing member tries to move upward, the locking member comes into contact with the peripheral portion of the fixing hole, preventing the reinforcing member from moving upward. This prevents the reinforcing member from coming off the deck beam.

In the seventh aspect of the present disclosure, the vertical dimensions of both ends of the reinforcing member are shorter than the vertical dimensions of the middle portion, so that both ends of the reinforcing member can be easily inserted between the upper pipe material and the lower pipe material.

As explained above, the upper and lower pipe materials that make up each deck beam are arranged so that they are not aligned in a direction perpendicular to the longitudinal direction of the deck beam in a plan view, and furthermore, a pair of deck beams arranged opposite each other are connected by reinforcing members, allowing for the construction of a highly flexible, compact, and strong suspended scaffolding using lightweight deck beams.

FIG. 1 is a perspective view of a suspended scaffolding according to an embodiment of the present invention, viewed from above. FIG. 2 is a side view of the above-mentioned suspended scaffolding. This is an enlarged perspective view of a portion of the deck of the suspended scaffolding. FIG. 4 is a view equivalent to FIG. 3 and showing the deck beam in a rotated state. FIG. 2 is a perspective view of a full length deck beam. FIG. 2 is a side view of a full length deck beam. FIG. 2 is an enlarged side view showing the vicinity of a fixing pin of a long deck beam. 8 is a cross-sectional view corresponding to the line VIII-VIII in FIG. 7, showing a state immediately before the reinforcing member is connected. FIG. 1 is a perspective view of a short overall length deck beam. FIG. 2 is a perspective view of an orthogonal deck beam. FIG. 1 is a side view of two deck beams connected by a pivoting beam joint. FIG. 1 is a plan view of two deck beams connected by a pivoting beam joint. FIG. 4 is a side view of a first connection portion of the pivoting beam joint. FIG. 4 is a side view of a second connection portion of the pivoting beam joint. FIG. FIG. 1 is a side view of a section connecting two deck beams by a first non-rotating beam joint. FIG. 2 is a perspective view of a first non-rotating beam joint. FIG. 2 is a perspective view of a second non-rotating beam joint. FIG. 13 is a perspective view of a third non-rotating beam joint. FIG. 13 is a perspective view of a fourth non-rotating beam joint. FIG. FIG. 13 is a perspective view showing a state in which the second non-rotating beam joint is attached to the hanging member by a retaining member inserted into a through hole. FIG.

The following describes in detail an embodiment of the present invention with reference to the drawings. Note that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its applications, or its uses.

Figure 1 is a perspective view of a suspended scaffolding 1 according to an embodiment of the present invention, and Figure 2 is a side view of the suspended scaffolding 1. As shown in Figure 2, the suspended scaffolding 1 includes a deck 2, a panel material 3 constituting a work floor, a hanging member 4, a first reinforcing member 210, and a second reinforcing member 220. The panel material 3 is, for example, composed of a wooden scaffolding board, a steel scaffolding board, an anti (a cloth frame with a board), etc., and is not particularly limited as long as it is a member that can constitute a work floor that serves as a scaffold for work. The size and shape of the panel material 3 can also be set arbitrarily according to the size and shape of the deck 2. In addition, the number of panel materials 3 can also be changed according to the size and shape of the deck 2.

The hanging member 4 is a member for suspending the deck beams 20 to 35 (described later) that constitute the deck 2 from a building, and can be composed of, for example, a metal chain. The upper side of the hanging member 4 is fixed, for example, directly to the building or indirectly via a metal fitting for a hanging device. The deck beams 20 to 35 are fixed to the lower side of the hanging member 4. The number of hanging members 4 can be any number according to the size and shape of the deck 2. The length of the hanging members 4 can be changed to any length according to the building and the work content. The position of the hanging members 4 can be any position according to the building and the work content. The deck beams 20 to 35 are scaffolding components that extend horizontally and on which the panel material 3 is installed.

In FIG. 1, the panel material 3 and part of the hanging member 4 are omitted. The suspended scaffolding 1 is constructed at the construction sites of various buildings and various civil engineering work sites according to the type and content of the work. For example, the suspended scaffolding 1 can also be used for bridge erection and bridge repair work. In addition to construction work, the suspended scaffolding 1 is also constructed for maintenance work. The suspended scaffolding 1 is suitable for construction at the construction sites and maintenance work sites of various plants, such as large-scale production equipment and factory facilities. In various plants, multiple pipes are installed outside the building in a complicated manner, and the suspended scaffolding 1 according to this embodiment can be constructed when work on these pipes or work on the building is to be performed.

As shown in FIG. 1, the deck 2 includes the first deck 2A, the second deck 2B, the third deck 2C, the fourth deck 2D, and the fifth deck 2E. The deck 2 may be composed of only the first deck 2A, or may be composed of any number of decks 2A to 2E, and the number is not limited to five. The first deck 2A is a deck that is assembled separately from the second to fifth decks 2B to 2E, and is also called the first deck. After assembling the first deck 2A on the ground, for example, it can be hung from a building by a hanging member 4 to form a work floor before the second to fifth decks 2B to 2E. After that, workers go up to the work floor of the first deck 2A to assemble the second deck 2B, and after the assembly of the second deck 2B is completed, workers go up to the work floor of the second deck 2B to assemble the third deck 2C, and in this way, it is possible to gradually expand the work floor by assembling up to the fifth deck 2E. In other words, the suspended scaffolding 1 of this embodiment is a pre-floor construction type suspended scaffolding that allows the scaffolding to be expanded in stages while the existing deck (first deck 2A) is suspended. Although not shown, handrails, baseboards, fabric materials, etc. may be attached to the suspended scaffolding 1.

The first deck 2A is composed of a base end deck beam 20, a right short deck beam 21, a left short deck beam 22, and a first intermediate deck beam 23. The base end deck beam 20 and the first intermediate deck beam 23 are the same and face each other. The right short deck beam 21 and the left short deck beam 22 are the same and face each other. The length of the right short deck beam 21 and the left short deck beam 22 is set shorter than the length of the base end deck beam 20 and the first intermediate deck beam 23. The base end deck beam 20 and the right short deck beam 21 are perpendicular to each other, and the base end deck beam 20 and the left short deck beam 22 are perpendicular to each other. The first intermediate deck beam 23 and the right short deck beam 21 are perpendicular to each other, and the first intermediate deck beam 23 and the left short deck beam 22 are perpendicular to each other. Therefore, the base end deck beam 20 and the first intermediate deck beam 23 are parallel, and the right short deck beam 21 and the left short deck beam 22 are parallel.

In this way, the four deck beams 20-23 constituting one deck 2A are arranged to form a rectangular shape in a plan view. The base end deck beam 20 is connected to the right short deck beam 21 and the left short deck beam 22, and the first intermediate deck beam 23 is connected to the right short deck beam 21 and the left short deck beam 22. The connection structure of these deck beams 20-23 will be described later. The lengths of the four deck beams 20-23 may all be the same. The lengths of the deck beams 20-23 are not limited to two types, but can be set arbitrarily. For example, the lengths of the deck beams 20-23 can be 610 mm, 914 mm, 1219 mm, 1524 mm, 1829 mm, etc., from the shortest to the largest. In this case, five deck beams of different lengths can be arbitrarily combined to form the decks 2A-2E. The above dimensions can be, for example, the dimensions from center to center of the beam joints attached to both ends of the deck beam.

For example, the lengths of the opposing deck beams 20, 23 (or the lengths of the deck beams 21, 22) on the first deck 2A are made the same. This makes the first deck 2A rectangular or square. By determining the specifications of the deck beams 20-23 in advance, such as their length, width, and vertical dimensions, the deck beams 20-23 can be made standard products, and a systemized suspended scaffolding 1 can be constructed.

The second deck 2B, like the first deck 2A, is rectangular in plan view and is made up of a first intermediate deck beam 23, a first right deck beam 24, a first left deck beam 25, and a second intermediate deck beam 26. The first intermediate deck beam 23 is shared with the first deck 2A. The deck beams 23 to 26 that make up the second deck 2B are the same length.

The third deck 2C, like the second deck 2B, is rectangular in plan view and is made up of a second intermediate deck beam 26, a second right deck beam 27, a second left deck beam 28, and a third intermediate deck beam 29. The second intermediate deck beam 26 is shared with the second deck 2B. The deck beams 26 to 29 that make up the third deck 2C are the same length.

The fourth deck 2D, like the second deck 2B, is rectangular in plan view and is made up of a third intermediate deck beam 29, a third right deck beam 30, a third left deck beam 31, and a first rear deck beam 32. The third intermediate deck beam 29 is shared with the third deck 2C. The deck beams 29 to 32 that make up the fourth deck 2D are the same length.

The fifth deck 2E, like the second deck 2B, is rectangular in plan view and is made up of a third left deck beam 31, a first rear deck beam 33, a second rear deck beam 34, and a third rear deck beam 35. The third left deck beam 31 is shared with the fourth deck 2D. The deck beams 31, 33 to 35 that make up the fifth deck 2E are the same length.

For example, as shown in FIG. 3, the first right deck beam 24 and the first left deck beam 25 of the second deck 2B may be shorter than the first intermediate deck beam 23 and the second intermediate deck beam 26. The deck beams 23 to 26 constituting the second deck 2B are connected to each other so as to be relatively rotatable around an axis extending in the vertical direction. By rotating the deck beams 23 to 26 relatively, the second intermediate deck beam 26 can be brought closer to the first intermediate deck beam 23, that is, the first deck 2A, as shown in FIG. 4. To achieve the rotation state shown in FIG. 4, the first right deck beam 24 and the first left deck beam 25 are connected in an inclined position relative to the first intermediate deck beam 23, and further, the second intermediate deck beam 26 is connected in an inclined position relative to the first right deck beam 24 and the first left deck beam 25. As a result, the second intermediate deck beam 26 can be connected to the first right deck beam 24 and the first left deck beam 25 at a position close to the first deck 2A, so that the connection work can be easily performed from above the first deck 2A. Then, as shown in FIG. 3, the deck beams 23 to 26 are rotated relative to one another so that they form a rectangle. Then, to prevent the deck beams 23 to 26 from rotating, the first right deck beam 24 and the first left deck beam 25 facing each other are connected by the first reinforcing member 210 and the second reinforcing member 220. The first reinforcing member 210 and the second reinforcing member 220 are members that extend long in the horizontal direction.

In this embodiment, an example is described in which the reinforcing member includes a first reinforcing member 210 and a second reinforcing member 220, but it may include only one of the first reinforcing member 210 and the second reinforcing member 220.

The first right deck beam 24 and the first left deck beam 25 facing each other may be locked by a rotation prevention member (not shown). The rotation prevention member may be, for example, a member capable of fixing the first left deck beam 25 and the first intermediate deck beam 23 while maintaining the angle between them at 90°, and may be, for example, a cap-shaped member that fits onto the ends of the first left deck beam 25 and the first intermediate deck beam 23, or a clamp that fixes the ends of the first left deck beam 25 and the first intermediate deck beam 23. The third deck 2C, the fourth deck 2D, and the fifth deck 2E may be configured in the same manner as the second deck 2B.

That is, the suspended scaffolding 1 can be constructed as follows. First, the first deck 2A is assembled on the ground, and then suspended from the building. In this process, the panel material 3 is installed on the first deck 2A. Then, a worker on the panel material 3 of the first deck 2A performs a process of rotatably connecting the deck beams 24 and 25 constituting the second deck 2B to the deck beam 23 constituting the first deck 2A. At this time, the deck beam 26 constituting the second deck 2B is brought close to the deck beam 23 constituting the first deck 2A. Next, the deck beams 24, 25, and 26 are rotated to form the rectangular or square second deck 2B. Then, the panel material 3 is installed on the second deck 2B. In this way, up to the fifth deck 2E is formed. This is the method of constructing the suspended scaffolding.

(Deck beam configuration)
The deck beams 20 to 35 constituting the first to fifth decks 2A to 2E can have the same structure, but different lengths. The deck beams 20 to 35 have a vertically symmetrical structure with the horizontal center line as the center of symmetry. The names of the deck beams 20 to 35 are given only for the convenience of explanation. Figures 5 and 6 show an example of a relatively long deck beam 20 (23 to 35), and Figure 9 shows an example of a relatively short deck beam 21 (22). The first to fifth decks 2A to 2E may be composed only of the deck beam 20 shown in Figures 5 and 6, or the first to fifth decks 2A to 2E may be composed only of the deck beam 21 shown in Figure 9.

As shown in Figures 5 and 6, the deck beam 20 comprises an upper pipe material 40, a lower pipe material 41, a one-side connecting material 42, an other-side connecting material 43, and an intermediate pipe material (short support) 44. The upper pipe material 40 and the lower pipe material 41 are made of, for example, steel pipes having a circular cross section, and are specifically, components such as single-pipe construction and fabric materials that have traditionally been used to construct temporary scaffolding. Therefore, the outer diameter of the upper pipe material 40 and the lower pipe material 41 is the same as that of the single-pipe construction and fabric materials.

The upper pipe material 40 extends horizontally. The panel material 3 is attached to the upper pipe material 40. The lower pipe material 41 is arranged below and away from the upper pipe material 40 and the panel material 3, and extends parallel to the upper pipe material 40. The outer diameter of the upper pipe material 40 and the outer diameter of the lower pipe material 41 are the same, but may be different. The length of the upper pipe material 40 and the length of the lower pipe material 41 are the same. The length of the deck beam 20 corresponds to the length of the upper pipe material 40. The direction perpendicular to the longitudinal direction of the deck beam 20 in a plan view is defined as the left-right direction of the deck beam 20, and the left-right direction of the deck beam 20 can also be called the width direction of the deck beam 20.

The one-side connecting member 42 and the other-side connecting member 43 are fixed to the upper pipe material 40 and the lower pipe material 41, respectively, by, for example, welding, and are members for connecting the upper pipe material 40 and the lower pipe material 41. The one-side connecting member 42 extends from one end of the upper pipe material 40 to one end of the lower pipe material 41 and is composed of a pair of left and right metal plate materials 42a, 42b arranged at intervals in the left-right direction. The left plate material 42a extends continuously from the lower part of the outer peripheral surface of one end of the upper pipe material 40 to the upper part of the outer peripheral surface of one end of the lower pipe material 41, and also extends in the longitudinal direction of the deck beam 20, and is offset to the left from the axis of the upper pipe material 40 and the lower pipe material 41 in a plan view. The right plate 42b is parallel to the left plate 42a and is offset to the right from the axis of the upper pipe 40 and the lower pipe 41 in a plan view. In a plan view, the left and right plate materials 42a, 42b are positioned so that they are hidden by the upper pipe 40.

The other side connecting member 43 is composed of a pair of left and right plate members 43a, 43b that extend from the other end of the upper pipe member 40 to the other end of the lower pipe member 41 and are arranged at a distance from each other in the left-right direction. The left plate member 43a extends continuously from the lower part of the outer circumferential surface of the other end of the upper pipe member 40 to the upper part of the outer circumferential surface of the other end of the lower pipe member 41, and also extends in the longitudinal direction of the deck beam 20, and is offset to the left from the axis of the upper pipe member 40 and the lower pipe member 41 in a plan view. The right plate member 43b is parallel to the left plate member 43a, and is offset to the right from the axis of the upper pipe member 40 and the lower pipe member 41 in a plan view. The one side connecting member 42 and the other side connecting member 43 have the same structure. Therefore, the deck beam 20 has a symmetrical structure with a straight line extending vertically through the center of the longitudinal direction as the center of symmetry.

The intermediate pipe material 44 is made of, for example, a steel pipe, and extends from the longitudinal middle part of the upper pipe material 40 to the longitudinal middle part of the lower pipe material 41. The upper end of the intermediate pipe material 44 is fixed to the lower part of the outer circumferential surface of the upper pipe material 40 via an upper bracket 44a. The lower end of the intermediate pipe material 44 is fixed to the upper part of the outer circumferential surface of the lower pipe material 41 via a lower bracket 44b. The intermediate pipe material 44 can also be fixed to the upper pipe material 40 and the lower pipe material 41 by welding or the like. Therefore, the upper pipe material 40 and the lower pipe material 41 are connected not only at both longitudinal ends but also at their middle parts, so that the deck beam 20 can ensure high strength. The number of intermediate pipe materials 44 is not limited to one, but may be two or more. The intermediate pipe material 44 may have an insertion part into which a wedge provided on the scaffolding component is inserted. If the upper pipe material 40 and the lower pipe material 41 are short, the middle pipe material 44 may be omitted.

The left-right dimension of the deck beam 20 is set shorter than the up-down dimension. That is, the deck beam 20 includes only one upper pipe material 40, and no other pipe material is arranged on the side of the upper pipe material 40. Also, the deck beam 20 includes only one lower pipe material 41, and no other pipe material is arranged on the side of the lower pipe material 41. The upper pipe material 40 and the lower pipe material 41 are arranged so that they are not lined up in the left-right direction in a plan view. Specifically, the lower pipe material 41 is located directly below the upper pipe material 40, and therefore, in a plan view, the axis of the upper pipe material 40 and the axis of the lower pipe material 41 overlap. By arranging the upper pipe material 40 and the lower pipe material 41 in this way, the left-right dimension of the deck beam 20 becomes equal to the outer diameter of the upper pipe material 40 or the lower pipe material 41. In addition, the left-right dimension of the brackets 44a, 44b of the intermediate pipe material 44 may be larger than the outer diameter of the upper pipe material 40 or the lower pipe material 41, but the difference is small and only a portion of the deck beam 20 in the longitudinal direction, so it is of little concern in constructing the deck 2. In addition, the left-right dimension of the brackets 44a, 44b of the intermediate pipe material 44 may be smaller than the outer diameter of the upper pipe material 40 or the lower pipe material 41.

The lower pipe material 41 is provided with a first fixing pin 45 and a second fixing pin 46 used when connecting the first reinforcing member 210 and the second reinforcing member 220. The first reinforcing member 210 may be connected to either the first fixing pin 45 or the second fixing pin 46, and the second reinforcing member 220 may be connected to either the first fixing pin 45 or the second fixing pin 46. The first fixing pin 45 extends upward from an upper portion closer to the one-side connecting member 42 than the longitudinal center of the lower pipe material 41. The second fixing pin 46 extends upward from an upper portion closer to the other-side connecting member 43 than the longitudinal center of the lower pipe material 41. Therefore, the first fixing pin 45 and the second fixing pin 46 are provided at an interval in the longitudinal direction of the lower pipe material 41. If the reinforcing member includes the first reinforcing member 210 and the second reinforcing member 220, both the first fixing pin 45 and the second fixing pin 46 are required, but if there is only one reinforcing member, only one of the first fixing pin 45 and the second fixing pin 46 is required.

The first fixing pin 45 and the second fixing pin 46 are located directly below the upper pipe material 40 and overlap with the upper pipe material 40 in a plan view so as not to be visible. The upper end of the first fixing pin 45 and the upper end of the second fixing pin 46 are spaced downward from the lower part of the upper pipe material 40. This creates a space R (shown only in FIG. 6 ) between the upper end of the first fixing pin 45 and the upper pipe material 40, and between the upper end of the second fixing pin 46 and the upper pipe material 40, respectively, into which the ends can be inserted into the first reinforcing member 210 or the second reinforcing member 220.

The first fixed pin 45 and the second fixed pin 46 are the same. The structure of the first fixed pin 45 will be described in detail below. As shown in Figures 7 and 8, the first fixed pin 45 includes a metal pin body 45a that is fixed to the upper part of the lower pipe material 41 and extends upward, and a metal locking member 45b. The pin body 45a is cylindrical, and its lower end is welded or otherwise attached to the upper part of the lower pipe material 41. The pin body 45a is provided with a housing portion 45c in which the locking member 45b is housed, at a portion spaced upward from the lower end of the pin body 45a. The housing portion 45c is formed of a groove formed in the pin body 45a, and is open both upward and radially.

The locking member 45b has a rectangular shape or a rectangular shape that can be approximated to a rectangle, and is accommodated in the accommodation section 45c with its longitudinal direction in the up-down direction. A support shaft 45d is provided on the upper side of the accommodation section 45c in the pin body 45a, which supports the upper side of the locking member 45b so that it can rotate freely around a horizontal line. The locking member 45b is supported at its upper side by the support shaft 45d and can rotate freely. As shown in FIG. 7, the locking member 45b can be switched between a locked position in which the lower side of the locking member 45b has rotated until it protrudes radially outward from the accommodation section 45c of the pin body 45a, and an unlocked position (not shown) in which the entire locking member 45b is completely accommodated in the accommodation section 45c.

The pin body 45a is provided with a biasing member 45e that biases the lower side of the locking member 45b in a direction that protrudes radially outward from the housing portion 45c of the pin body 45a. The biasing member 45e is made of an elastic member such as a spring, and the biasing force of the biasing member 45e constantly biases the locking member 45b toward the locked position.

The first reinforcing member 210 and the second reinforcing member 220 are made of the same cylindrical or rod-shaped member. The first reinforcing member 210 and the second reinforcing member 220 have a smaller diameter than the upper pipe material 40 and the lower pipe material 14. The first reinforcing member 210 has a cylindrical middle portion in the longitudinal direction, while both longitudinal ends are plate-shaped extending horizontally. Specifically, as shown in FIG. 8, the vertical dimension of both longitudinal ends of the first reinforcing member 210 is shorter than the vertical dimension of the longitudinal middle portion of the first reinforcing member 210. At both longitudinal ends of the first reinforcing member 210, a fixing hole 210a through which the first fixing pin 45 or the second fixing pin 46 is inserted is formed. Since the first fixing pin 45 and the second fixing pin 46 are the same, either one can be inserted into the fixing hole 210a.

The components constituting the deck beam 21 shown in Figure 9 are different from those constituting the deck beam 20 shown in Figures 5 and 6 only in the length of the upper pipe material 40 and the lower pipe material 41. Since they have basically the same structure, they are given the same reference numerals as in Figure 5 and their explanations are omitted. A first fixing pin 45 and a second fixing pin 46 can also be provided on this short deck beam 21.

For example, as shown in FIG. 3, the first reinforcing member 210 and the second reinforcing member 220 are arranged to intersect with each other in a plan view. That is, one end of the first reinforcing member 210 and one end of the second reinforcing member 220 (the end on the right side in FIG. 3) are connected to a portion of one of the pair of deck beams 24, 25 that is spaced apart in the longitudinal direction. In addition, the other end of the first reinforcing member 210 and the other end of the second reinforcing member 220 (the end on the left side in FIG. 3) are connected to a portion of the other of the pair of deck beams 24, 25 that is spaced apart in the longitudinal direction.

When connecting the first reinforcing member 210 to the deck beam 24, as shown in FIG. 8, the end of the first reinforcing member 210 is placed above the first reinforcing member 210. Then, the end of the first reinforcing member 210 is lowered to insert the first reinforcing member 210 into the fixing hole 210a. At this time, the locking member 45b is pushed by the fixing hole 210a and accommodated in the accommodation portion 45c, switching to the unlocked position. This allows the first reinforcing member 210 to be inserted into the fixing hole 210a. When completely inserted, the locking member 45b switches to the locked position, so that the first reinforcing member 210 does not come out of the fixing hole 210a. The second reinforcing member 220 can be connected in the same manner.

(Configuration of orthogonal deck beams)
As shown in FIG. 1, the suspended scaffolding 1 may include an orthogonal deck beam 50 as necessary. The position of the orthogonal deck beam 50 can be set arbitrarily. In the example shown in FIG. 1, the orthogonal deck beam 50 is arranged on the fourth deck 2D and the fifth deck 2E, respectively. However, the orthogonal deck beam 50 may be arranged on the first to third decks 2A to 2C. The orthogonal deck beam 50 arranged on the fourth deck 2D is bridged across a pair of the third intermediate deck beam 29 and the first rear deck beam 32 facing each other, and is arranged so as to be perpendicular to the pair of deck beams 29, 32. The position of the orthogonal deck beam 50 can be set arbitrarily as long as it is in the longitudinal direction of the third intermediate deck beam 29 and the first rear deck beam 32. The orthogonal deck beam 50 may be bridged across a pair of the third right deck beam 30 and the third left deck beam 31 facing each other. The orthogonal deck beam 50 can be moved horizontally on the deck beam after being installed on each deck beam.

The orthogonal deck beam 50 is positioned horizontally away from the third right deck beam 30, which is parallel to the orthogonal deck beam 50. This results in an opening A being formed between the orthogonal deck beam 50 and the third right deck beam 30. By constructing the suspended scaffolding 1 so that the plant piping passes through this opening A, it is possible to construct the suspended scaffolding 1 over a wide area while avoiding interference with the piping. In this case, it is sufficient to close the opening A between the orthogonal deck beam 50 and the third right deck beam 30 with panel material 3 only in the part where the piping does not pass.

The orthogonal deck beam 50 arranged on the fifth deck 2E is spanned across a pair of opposing third left deck beam 31 and third rear deck beam 35, and is positioned so as to be perpendicular to the pair of deck beams 31, 35. The position of the orthogonal deck beam 50 can be set arbitrarily as long as it is in the longitudinal direction of the third left deck beam 31 and the third rear deck beam 35. The orthogonal deck beam 50 may also be spanned across a pair of opposing first rear deck beam 33 and second rear deck beam 34. An opening B is formed between the orthogonal deck beam 50 and the first rear deck beam 33. The suspended scaffolding 1 can also be constructed so that the plant piping can pass through this opening B.

As shown in FIG. 10, the orthogonal deck beam 50 comprises an upper pipe material 51 and a lower pipe material 52 similar to the deck beam 20 described above, a one-side connecting material 53 consisting of a pair of plate materials 53a, 53b, an other-side connecting material 54 consisting of a pair of plate materials 54a (only one is shown), and an intermediate pipe material 55. The upper end of the intermediate pipe material 55 is fixed to the upper pipe material 51 by an upper bracket 55a. The lower end of the intermediate pipe material 55 is fixed to the lower pipe material 52 by a lower bracket 55b.

The orthogonal deck beam 50 further includes a one-side locking portion 56 and an other-side locking portion 57. The one-side locking portion 56 is made of a metal plate material fixed to one end of the upper pipe material 51 and the lower pipe material 52, and is open downward and in both the left and right directions (directions perpendicular to the longitudinal direction of the orthogonal deck beam 50 in a plan view). The dimensions of the open portion of the one-side locking portion 56 correspond to the outer diameter dimensions of the upper pipe material 40 and the lower pipe material 41 shown in Figures 5 and 6. Specifically, the longitudinal dimension of the orthogonal deck beam 50 in the open portion of the one-side locking portion 56 is set to be slightly larger (to the extent that almost no rattling occurs) than the outer diameter dimensions of the upper pipe material 40 and the lower pipe material 41 shown in Figures 5 and 6, and the upper pipe material 40 and the lower pipe material 41 can be inserted radially from the open portion of the one-side locking portion 56. As a result, for example, as shown in FIG. 1, by positioning the orthogonal deck beam 50 above the third intermediate deck beam 29 and then moving it downward, the one-side locking portion 56 can be locked from above against the third intermediate deck beam 29, preventing the orthogonal deck beam 50 from falling. The other-side locking portion 57 is configured in the same manner as the one-side locking portion 56, and is fixed to the other end of the upper pipe material 51 and the lower pipe material 52.

(Rotating beam joint)
As shown in Figures 3 and 4, when the deck beams 23 to 26 constituting the second deck 2B are connected to each other so as to be relatively rotatable, the deck beams 23 to 26 are connected using a rotating beam joint 60. The rotating beam joint 60 is a member constituting the suspended scaffolding 1, and has a vertically symmetrical structure with a horizontally extending center line as the center of symmetry. As also shown in Figures 11A and 11B, the rotating beam joint 60 includes a first connection part 61 and a second connection part 62, both of which are made of high-strength metal material. Figures 11A and 11B show a case where the first intermediate deck beam 23 and the first right deck beam 24 are connected, and the first intermediate deck beam 23 is the first deck beam, and the first right deck beam 24 is the second deck beam. The rotating beam joint 60 connects one end of the first intermediate deck beam 23 and one end of the first right deck beam 24 to each other. In addition to the examples shown in Figures 11A and 11B, the pivot beam joint 60 can also be used to connect other deck beams.

The first connection part 61 of the pivot beam joint 60 is a member that is inserted between the pair of left and right plate materials 42a, 42b that constitute one side connecting member 42 of the first intermediate deck beam 23 and connected to the pair of plate materials 42a, 42b. The first connection part 61 can also be used as a member that is inserted between the pair of left and right plate materials 43a, 43b that constitute the other side connecting member 43 and connected to the pair of plate materials 43a, 43b.

Specifically, the first connection portion 61 has a plate-shaped main body portion 61a that is inserted between a pair of plate materials 42a, 42b of the first intermediate deck beam 23. The main body portion 61a extends in the vertical direction along the plate materials 42a, 42b and also extends in the longitudinal direction of the first intermediate deck beam 23. The longitudinal dimension of the main body portion 61a is set to be longer than the longitudinal dimension of the plate materials 42a, 42b. As a result, when the main body portion 61a is inserted between the plate materials 42a, 42b, it protrudes from between the plate materials 42a, 42b toward both sides in the longitudinal direction of the first intermediate deck beam 23. The first connection part 61 is inserted from one end side of the first intermediate deck beam 23 toward the space between the plate materials 42a, 42b, so with the insertion direction as the reference, the tip end of the first connection part 61 is the end located on the tip side in the insertion direction, and the base end of the first connection part 61 is the end located on the base side in the insertion direction.

The portion of the body 61a near the tip is a portion that protrudes from between the plate materials 42a and 42b. In the portion of the body 61a near the tip, an insertion hole 61b into which a fastener 63 is inserted as shown in FIG. 13 is formed so as to penetrate in the thickness direction. The fastener 63 has a first rod-shaped portion 63a and a second rod-shaped portion 63b that are perpendicular to each other. The tip of the first rod-shaped portion 63a is rotatable around a rotation axis 63c. When the first connecting portion 61 tries to move in a direction to come out from between the plate materials 42a and 42b with the first rod-shaped portion 63a inserted into the insertion hole 61b, the first rod-shaped portion 63a abuts against the edge of the plate materials 42a and 42b, so that the first connecting portion 61 cannot come out from between the plate materials 42a and 42b. By removing the first rod-shaped portion 63a from the insertion hole 61b and removing the fastener 63, the first connection portion 61 can be removed from between the plate materials 42a and 42b. The fastener 63 can also be attached so as to penetrate the plate materials 42a and 42b. The fastener 63 can also be attached to the plate material 42a or the main body portion 61a with a wire or chain (not shown) to prevent it from falling.

As shown in FIG. 12A, a pivot shaft 61c extending in the vertical direction is provided at the base end of the main body 61a of the first connection part 61. The pivot shaft 61c has a circular horizontal cross section and is made of, for example, a cylindrical member. The upper and lower ends of the pivot shaft 61c are fixed to the upper and lower ends of the main body 61a by welding or the like. A gap S is formed between the outer peripheral surface of the pivot shaft 61c and the vertical edge on the base end side of the main body 61a.

As shown in Figures 11A and 11B, the second connection part 62 of the pivot beam joint 60 is a member that is inserted between the pair of left and right plate materials 42a, 42b that constitute the one-side connecting member 42 of the first right deck beam 24 and connected to the pair of plate materials 42a, 42b. The second connection part 62 can also be used as a member that is inserted between the pair of left and right plate materials 43a, 43b that constitute the other-side connecting member 43 and connected to the pair of plate materials 43a, 43b.

Specifically, the second connection portion 62 has a plate-shaped main body portion 62a that is inserted between a pair of plate materials 42a, 42b of the first right deck beam 24. The main body portion 62a extends in the vertical direction along the plate materials 42a, 42b, similar to the main body portion 61a of the first connection portion 61, and also extends in the longitudinal direction of the first right deck beam 24. The longitudinal dimension of the main body portion 62a is set to be longer than the longitudinal dimension of the plate materials 42a, 42b. As a result, when the main body portion 62a is inserted between the plate materials 42a, 42b, it protrudes from between the plate materials 42a, 42b toward both sides in the longitudinal direction of the first right deck beam 24. The second connection part 62 is inserted from one end of the first right deck beam 24 toward the space between the plate members 42a, 42b, so with the insertion direction as the reference, the tip of the second connection part 62 is the end located on the tip side of the insertion direction, and the base end of the second connection part 62 is the end located on the base side of the insertion direction.

The portion of the body 62a near the tip protrudes from between the plate members 42a and 42b. In the portion of the body 62a near the tip, an insertion hole 62b (shown in FIG. 12B) into which a fastener 63 as shown in FIG. 13 is inserted is formed so as to penetrate in the thickness direction, similar to the first connection portion 61.

A cylindrical portion 62c extending in the vertical direction is provided at the base end of the main body 62a of the second connection portion 62. The cylindrical portion 62c has a circular cross section in the horizontal direction and is made of, for example, a circular pipe material. The rotating shaft portion 61c of the first connection portion 61 is rotatably inserted into the cylindrical portion 62c. In other words, the inner diameter of the cylindrical portion 62c and the outer diameter of the rotating shaft portion 61c are set so that a predetermined gap is formed between the inner peripheral surface of the cylindrical portion 62c and the outer peripheral surface of the rotating shaft portion 61c. In addition, the thickness of the peripheral wall portion of the cylindrical portion 62c is set to be thinner than the gap S shown in FIG. 12A.

When connecting the first connection part 61 and the second connection part 62, first, the pivot shaft part 61c is removed from the main body part 61a. Then, the pivot shaft part 61c is inserted into the tube part 62c of the second connection part 62. Next, the upper and lower ends of the pivot shaft part 61c are welded to the main body part 61a of the first connection part 61. This allows the first connection part 61 and the second connection part 62 to rotate relatively around the pivot shaft part 61c.

Therefore, as shown in Figures 3 and 4, by connecting the deck beams 23 to 26 using a pivoting beam joint 60, the second deck 2B can be transformed from a rectangle to a parallelogram and from a parallelogram to a rectangle in a plan view.

As shown in FIG. 1, the first intermediate deck beam 23 is a component of the first deck 2A, and therefore needs to be connected to the right short deck beam 21 and the left short deck beam 22. In this case, a connecting plate portion 62d (shown only in FIG. 3) made of a plate material similar to that of the main body portion 62a is provided on the tubular portion 62c of the second connecting portion 62 of the pivot beam joint 60, and this connecting plate portion 62d can be inserted between a pair of left and right plate materials constituting one side connecting member of the left short deck beam 22 and attached with the fasteners described above. The connection to the right short deck beam 21 can also be made by the connecting plate portion 62d in the same manner.

(Non-rotating beam joint)
In addition to being able to connect the deck beams 20 to 35 with the above-mentioned rotating beam joint 60, as shown in Figures 14 to 18, the deck beams 20 to 35 can also be connected with the first to fourth non-rotating beam joints 70 to 73. The first to fourth non-rotating beam joints 70 to 73 may be used as necessary. The first to fourth non-rotating beam joints 70 to 73 are members that constitute the suspended scaffolding 1, and have a vertically symmetrical structure with the center line extending in the horizontal direction as the center of symmetry. Therefore, the first to fourth non-rotating beam joints 70 to 73 can be used by being upside down.

As shown in Figures 14 and 15, the first non-rotating beam joint 70 is a member for connecting two deck beams 36, 37 when they are arranged in series in the longitudinal direction. Figure 14 shows an example of connecting one end of the deck beam 36 to one end of the deck beam 37, but any deck beams arranged in series can be connected by the first non-rotating beam joint 70. Note that although the first non-rotating beam joint 70 is not shown in Figure 1, if the deck beams 36, 37 connected in series as in Figure 14 are included in the suspended scaffolding 1, the first non-rotating beam joint 70 can be used.

The first non-rotating beam joint 70 is composed of a plate material inserted between the pair of left and right plate materials 42a, 42b constituting one side connecting member 42 of the deck beam 36 and between the pair of left and right plate materials 42a, 42b constituting one side connecting member 42 of the deck beam 37, and the thickness and vertical dimension of this plate material are the same as the thickness and vertical dimension of the main body 61a of the rotating beam joint 60. The length of the first non-rotating beam joint 70 is set so that it protrudes from between the plate materials 42a, 42b when inserted between the plate materials 42a, 42b of the deck beam 36, and the protruding part has an insertion hole 70b into which the fastener 63 is inserted. The length of the first non-rotating beam joint 70 is set so that it protrudes from between the plate materials 42a, 42b when inserted between the plate materials 42a, 42b of the deck beam 37, and the protruding part has an insertion hole 70c into which the fastener 63 is inserted. In other words, the connection structure between the first non-rotating beam joint 70 and the deck beams 36, 37 is the same as the connection structure between the first non-rotating beam joint 70 and the deck beams 36, 37, except that it cannot rotate. Therefore, like the rotating beam joint 60, the first non-rotating beam joint 70 can be attached so that it does not come off the deck beams 20 to 35. The center of the first non-rotating beam joint 70 is provided with a main body 70A made of a circular tube material extending in the vertical direction. The main body 70A has a through hole 70a that penetrates the peripheral wall. This through hole 70a can be engaged with the lower side of the hanging member 4 like the second non-rotating beam joint 71 described later.

The second non-rotating beam joint 71 shown in FIG. 16 is a member for connecting mutually orthogonal parts, such as the base end deck beam 20 and the right short deck beam 21 shown in FIG. 1. In addition to the base end deck beam 20 and the right short deck beam 21, the second non-rotating beam joint 71 can also be used, for example, when connecting the third right deck beam 30 and the first rear deck beam 32. In the explanation of the second non-rotating beam joint 71, the base end deck beam 20 and the right short deck beam 21, which are mutually orthogonal, can also be called the first deck beam and the second deck beam, respectively.

The second non-rotating beam joint 71 has a cylindrical main body 71a, a first connecting part 71b, a second connecting part 71c, and a retaining member 77 (shown in Figs. 19A and 19B), and is a member equivalent to a temporary scaffolding hanging hardware. As shown in Fig. 20, the second non-rotating beam joint 71 is suspended by a hanging member 4, and the retaining member 77 prevents the hanging member 4 from coming off the cylindrical main body 71a.

As shown in FIG. 16, the cylindrical main body 71a is made of a metal circular tube material that extends in the vertical direction, and its vertical dimension is set to be shorter than the vertical dimension of the deck beams 20 to 35. The cylindrical main body 71a may be configured in a square tube shape. The length of the cylindrical main body 71a can be set as desired.

The cylindrical main body 71a is designed so that the lower side of the hanging member 4 can be inserted through it. In other words, the inner diameter of the cylindrical main body 71a is set to be larger than the outer diameter dimension of the maximum outer diameter part of the chain that constitutes the hanging member 4. In addition, a pair of through holes 71f that penetrate the peripheral wall are formed in the upper and lower parts of the cylindrical main body 71a. The pair of through holes 71f have the same height and diameter, and therefore the pair of through holes 71f open at opposing positions in the peripheral wall.

19A and 19B, the retaining member 77 is generally composed of a pin-shaped member or a shaft-shaped member, and is made of a high-strength material such as metal. The retaining member 77 has an intermediate portion 77a extending straight in a linear manner, a bent portion 77b bent from one end of the intermediate portion 77a in a direction intersecting the extension direction of the intermediate portion 77a, and a rotating portion 77d rotatably supported by an axis 77c intersecting the extension direction of the intermediate portion 77a with respect to the other end of the intermediate portion 77a. The intermediate portion 77a has an outer diameter that can be inserted through the through hole 71f of the cylindrical main body portion 71a and the ring 4a (shown in FIG. 20) of the chain that constitutes the hanging member 4. The length of the intermediate portion 77a is set to be longer than the outer diameter dimension of the cylindrical main body portion 71a, and when the intermediate portion 77a is inserted into a pair of through holes 71f in the cylindrical main body portion 71a, a portion of the intermediate portion 77a protrudes from the outer peripheral surface of the cylindrical main body portion 71a.

The bent portion 77b is formed so as to be perpendicular to the axis of the intermediate portion 77a. The length of the bent portion 77b is set to be longer than the inner diameter of the through hole 71f of the cylindrical main body portion 71a, so that the bent portion 77b cannot pass through the through hole 71f.

The rotating part 77d is a member having the same diameter as the intermediate part 77a. The rotating part 77d is switched between an insertion-permitted position as shown by a solid line in FIG. 19A and a locked position as shown by a virtual line in the same figure by rotating around the shaft 77c. It is automatically switched to the locked position. In the insertion-permitted position, the axis of the rotating part 77d and the axis of the intermediate part 77a are arranged on the same straight line, so that the rotating part 77d can be inserted into the through hole 71f of the cylindrical main body part 71a and into the ring 4a (shown in FIG. 20) of the chain constituting the hanging member 4. On the other hand, in the locked position, the axis of the rotating part 77d is in a positional relationship perpendicular to the axis of the intermediate part 77a, so that the rotating part 77d cannot pass through the through hole 71f. The structure of the retaining member 77 is not limited to the above-mentioned structure, and may be any structure that can prevent the hanging member 4 from coming off the cylindrical main body part 71a. The retaining member 77 may also be inserted through both of the upper and lower through holes 70f of the cylindrical main body 71a. This further improves safety.

As shown in FIG. 20, with the lower side of the hanging member 4 inserted into the cylindrical main body 71a, the rotating part 77d of the anti-slip member 77 is set to the insertion-permitting position, and then the anti-slip member 77 is inserted from the rotating part 77d through the through hole 71f of the cylindrical main body 71a and into the ring 4a of the chain that constitutes the hanging member 4, so that the rotating part 77d protrudes outward from the through hole 71f of the cylindrical main body 71a. After that, when the rotating part 77d is switched to the lock position, the anti-slip member 77 cannot come out of the through hole 71f of the cylindrical main body 71a and is held in the cylindrical main body 71a. This allows the second non-rotating beam joint 71 to be attached to the hanging member 4.

As shown in FIG. 16, the first connection part 71b is made of a plate material similar to the main body part 61a of the rotating beam joint 60, and the part protruding from between the pair of left and right plate materials 42a, 42b constituting the one-side connecting member 42 has an insertion hole 71d for inserting the fastener 63. The second connection part 71c is made of a plate material similar to the main body part 62a of the rotating beam joint 60, and the part protruding from between the pair of left and right plate materials 42a, 42b constituting the one-side connecting member 42 has an insertion hole 71e for inserting the fastener 63. Therefore, the second non-rotating beam joint 71 is connected to the deck beams 20 to 35 in the same way as the rotating beam joint 60, and is attached so as not to come off the deck beams 20 to 35.

The base end of the first connection part 71b and the base end of the second connection part 71c are fixed to the outer circumferential surface of the cylindrical main body part 71a, for example, by welding. In plan view, the first connection part 71b and the second connection part 71c protrude in directions perpendicular to each other. This makes it possible to connect perpendicular parts to each other, such as the base end side deck beam 20 and the right side short deck beam 21.

The third non-rotating beam joint 72 shown in FIG. 17 is a member equivalent to a temporary scaffolding hoisting hardware, and is a member for connecting three deck beams, including those that are orthogonal, such as the right short deck beam 21, the first intermediate deck beam 23, and the first right deck beam 24 shown in FIG. 1. In addition to the right short deck beam 21, the first intermediate deck beam 23, and the first right deck beam 24, the third non-rotating beam joint 72 can be used when connecting two deck beams arranged in series and a deck beam that is orthogonal to these deck beams arranged in series. In the explanation of the third non-rotating beam joint 72, the right short deck beam 21 and the first intermediate deck beam 23 that are orthogonal to each other can also be called the first deck beam and the second deck beam, respectively, and the first right deck beam 24 can be called the third deck beam.

The third non-rotating beam joint 72 includes a cylindrical main body 72a, a first connecting portion 72b, a second connecting portion 72c, and a retaining member 77 (not shown in FIG. 17) configured in the same manner as the cylindrical main body 71a, the first connecting portion 71b, the second connecting portion 71c, and the retaining member 77 of the second non-rotating beam joint 71, and also includes a third connecting portion 72g. The cylindrical main body 72a is formed with a through hole 72f through which the retaining member 77 can be inserted. This allows the third non-rotating beam joint 72 to be suspended from the hanging member 4, as in the example shown in FIG. 20. In addition, the first connecting portion 71b and the second connecting portion 71c are formed with insertion holes 72d and 72e through which the fastener 63 is inserted, respectively.

The third connection part 72g is made of a plate material similar to the first connection part 72b and the second connection part 72c, and is inserted between the pair of left and right plate materials 42a, 42b that make up one side connecting member 42 of the first right deck beam 24, and is connected to the pair of plate materials 42a, 42b. An insertion hole 72h into which the fastener 63 is inserted is formed in the third connection part 72g.

The base end of the third connection portion 72g is fixed to the outer peripheral surface of the cylindrical main body portion 72a, for example by welding. In plan view, the second connection portion 72c and the third connection portion 72g protrude in directions perpendicular to each other. Furthermore, the first connection portion 72b and the third connection portion 72g are arranged so as to be aligned on the same straight line. This allows the right short deck beam 21, the first intermediate deck beam 23, and the first right deck beam 24 to be connected to each other. Note that the first connection portion 72b and the third connection portion 72g may protrude in directions perpendicular to each other in plan view.

The fourth non-rotating beam joint 73 shown in FIG. 18 is a member equivalent to a temporary scaffolding hoisting hardware, and is a member for connecting four deck beams including those that are perpendicular, such as the second left deck beam 28, the third intermediate deck beam 29, the third left deck beam 31, and the second rear deck beam 34 shown in FIG. 1. In addition to the second left deck beam 28, the third intermediate deck beam 29, the third left deck beam 31, and the second rear deck beam 34, the fourth non-rotating beam joint 73 can be used when connecting two deck beams arranged in series and two deck beams arranged in series in a direction perpendicular to these deck beams arranged in series.

The fourth non-rotating beam joint 73 includes a cylindrical main body 73a, a first connecting portion 73b, a second connecting portion 73c, a third connecting portion 73g, and a retaining member 77 (not shown in FIG. 18) configured in the same manner as the cylindrical main body 72a, the first connecting portion 72b, the second connecting portion 72c, the third connecting portion 72g, and the retaining member 77 of the third non-rotating beam joint 72, and also includes a fourth connecting portion 73i. The cylindrical main body 73a is formed with a through hole 73f through which the retaining member 77 can be inserted. This allows the fourth non-rotating beam joint 73 to be suspended from the hanging member 4, as in the example shown in FIG. 20. In addition, the first connecting portion 73b, the second connecting portion 73c, and the third connecting portion 73g are formed with insertion holes 73d, 73e, and 73h through which the fastener 63 is inserted, respectively.

The fourth connection part 73i is made of the same plate material as the first connection part 73b, the second connection part 73c, and the third connection part 73g, and is inserted between the pair of left and right plate materials 42a, 42b that constitute one side connecting member 42 of the second rear deck beam 34, for example, and connected to the pair of plate materials 42a, 42b. An insertion hole 73j into which the fastener 63 is inserted is formed in the fourth connection part 73i.

The base end of the fourth connection portion 73i is fixed to the outer peripheral surface of the cylindrical main body portion 73a, for example by welding. In a plan view, the first connection portion 73b, the third connection portion 73g, and the fourth connection portion 73i protrude in directions perpendicular to each other. Furthermore, the second connection portion 73c and the fourth connection portion 73i are arranged so as to be aligned on the same straight line. This allows the second left deck beam 28, the third intermediate deck beam 29, the third left deck beam 31, and the second rear deck beam 34 to be connected to each other.

As shown in FIG. 1, the suspended scaffolding 1 is provided with short struts 80 to which scaffolding components such as fabric material 90 are connected. The short struts 80 extend vertically from the longitudinal middle of the upper pipe material 40 to the longitudinal middle of the lower pipe material 41.

(Shelf scaffolding)
As shown in Fig. 2, a shelf scaffold 110 can be provided as a temporary scaffold. The shelf scaffold 110 is provided above and away from the panel material 3 of the suspended scaffold 1, and is smaller than the suspended scaffold 1 (the area of the scaffolding is smaller). The shelf scaffold 110 is also constructed in a state of being suspended from a building, so it can also be called a type of suspended scaffold.

The shelf scaffolding 110 comprises a plurality of cloth materials 111, panel materials 112, hanging posts 113, and hanging members 4. For example, four cloth materials 111 are arranged to form a rectangular shape in a plan view, forming a structure such as the deck 2 described above. Wedges 111a that protrude downward are attached to both ends of the cloth material 111. The hanging posts 113 can be suspended from the hanging members 4 in the same manner as the example shown in FIG. 20. By providing the hanging posts 113 outside the deck 2, a scaffolding that extends outside the deck 2 can be constructed together with the cloth materials 90. Also, another hanging scaffolding can be constructed using the hanging posts 113 and the cloth materials 90.

(Effects of the embodiment)
As described above, according to this embodiment, the lower side of the hanging member 4 fixed to the building can be inserted into the cylindrical main body 71a of the second non-rotating beam joint 71, for example, and held so as not to come out of the cylindrical main body 71a. By hanging a plurality of the second non-rotating beam joints 71 at intervals in the horizontal direction and connecting the deck beams 20 to 35 to the second non-rotating beam joints 71, the deck beams 20 to 35 can be held horizontally. After holding a plurality of the deck beams 20 to 35 in this manner, the panel material 3 can be installed on the deck beams 20 to 35 to construct the suspended scaffolding 1. Since the second non-rotating beam joints 71 can be hung from each hanging member 4, the second non-rotating beam joints 71 can be freely positioned according to the position of the hanging member 4. In other words, for example, if the hanging member 4 is positioned so as to avoid the plant piping, the second non-rotating beam joint 71 can be installed so as to avoid the piping, so that the deck beams 20-35 and panel material 3 can be installed while avoiding interference with the piping.

As shown in Figures 1 and 2, a systemized suspended scaffolding 1 can be constructed using multiple deck beams 20-35 and panel materials 3. This significantly reduces the time required for construction compared to conventional single-pipe suspended scaffolding. In addition, because the upper pipe materials 40 and lower pipe materials 41 that make up the deck beams 20-35 are not aligned in a direction perpendicular to the longitudinal direction of the deck beams 20-35 in a plan view, the left-right dimensions of the deck beams 20-35 are significantly shorter than those of a beam unit with a truss structure.

In addition, by shortening the left-right dimensions of the deck beams 20-35, the probability of interference with piping, etc. is reduced when constructing the suspended scaffolding 1 in a building with multiple, intricately intertwined pipes, such as a plant, and the freedom to construct the suspended scaffolding 1 is improved.

In addition, the fact that the pipe materials 40, 41 are not lined up in the left-right direction of the deck beams 20-35 means that the number of parts that make up the deck beams 20-35 is reduced, and therefore the deck beams 20-35 are lighter. Because the deck beams 20-35 are light, they are easier to transport and install. For example, when constructing a pre-floor construction type suspended scaffolding 1, the extension deck beams 24-35 can be connected to the deck beams 20-23 that are suspended in advance. At this time, the extension deck beams 24-35 are lightweight, which improves workability.

Furthermore, since a pair of deck beams 24, 25 arranged opposite each other are connected by reinforcing members 210, 220, the relative positions of the two deck beams 24, 25 are less likely to shift, particularly when a horizontal external force is applied, resulting in high strength.

The above-described embodiments are merely illustrative in all respects and should not be interpreted as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention.

As described above, the suspended scaffolding disclosed herein can be used, for example, as temporary scaffolding constructed in various plants, etc.

1 Suspended scaffolding 20 to 35 Deck beam 40 Upper pipe member 41 Lower pipe member 45 First fixed pin 45a Pin body 45b Lock member 45c Storage portion 45d Support shaft 45e Urging member 46 Second fixed pin 210 First reinforcing member 220 Second reinforcing member

Claims (4)

A plurality of deck beams connected to form a rectangular shape in a plan view;
A panel material that is installed on the deck beam and that constitutes a work floor;
A hanging scaffolding including a hanging member for hanging the deck beam to a building,
All of the deck beams include an upper pipe material extending horizontally, a lower pipe material arranged below and away from the upper pipe material and extending parallel to the upper pipe material, and a connecting material fixed to the upper pipe material and the lower pipe material and connecting the upper pipe material and the lower pipe material, and the upper pipe material and the lower pipe material are arranged so that they are not lined up in the left-right direction perpendicular to the longitudinal direction of the deck beam in a plan view,
The deck beam includes a pair of deck beams arranged to face each other,
A reinforcing member is provided to connect the pair of deck beams ,
The reinforcing member includes a first reinforcing member and a second reinforcing member,
the first reinforcing member and the second reinforcing member are arranged to intersect with each other in a plan view,
One end of the first reinforcing member and one end of the second reinforcing member are connected to a portion of one of the pair of deck beams that is spaced apart in the longitudinal direction,
The other end of the first reinforcing member and the other end of the second reinforcing member are connected to a portion of the other deck beam of the pair of deck beams that is spaced apart in the longitudinal direction,
A fixing pin extending upward is provided on the upper portion of the lower pipe material of all of the deck beams, and the upper end portion of the fixing pin is spaced downward from the lower portion of the upper pipe material,
A suspended scaffolding in which fixing holes through which the fixing pins are inserted are formed at both ends of the first reinforcing member and the second reinforcing member . The suspended scaffolding according to claim 1 ,
The panel material is attached to the upper pipe material. The suspended scaffolding according to claim 1 ,
The fixing pin includes a pin body fixed to an upper portion of the lower pipe member and extending upward, and a locking member.
The pin body is provided with an accommodating portion in which the locking member is accommodated at a portion spaced upward from a lower end portion of the pin body,
a support shaft that supports an upper side of the locking member so as to be rotatable about a horizontal line on an upper side of the accommodation portion of the pin body,
A suspended scaffolding in which a biasing member is provided on the pin body to bias the lower side of the locking member in a direction in which it protrudes radially outward from the accommodating portion of the pin body. In the suspended scaffolding according to any one of claims 1 to 3 ,
A suspended scaffolding in which the vertical dimensions of both ends of the reinforcing member are shorter than the vertical dimensions of the middle part of the reinforcing member.