JP6734828B2 - Strut members for temporary scaffolding - Google Patents

Description

The present invention relates to a strut member for a temporary scaffold, which is a component of a strut used for constructing a temporary scaffold.

Conventionally, in scaffolds that are temporarily installed in construction sites, etc., columns that are connected in series with column members with tightly bound portions are erected at predetermined intervals, and beam members (cloth materials (arm wood also (Including), brackets, root girdles, etc.) are combined in a vertical and horizontal direction by engaging tightly bound parts, and a single pipe scaffold (one side scaffold) in which a footboard is installed on a cloth material is used. The stanchions used in single-pipe scaffolds are commonly referred to as single-pipe struts and are often used in constructing temporary scaffolds for relatively low-rise buildings. In a single pipe scaffolding, a jack type base metal fitting is generally placed at the bottom, and even if there is a slight difference in ground clearance, the jack type base metal fitting tightly connects adjacent single pipe stanchions (and the vertical connection of the pillar members). The position is adjusted so that the (part positions) are aligned in the horizontal direction. Patent Document 1 is shown as an example of disclosing such a temporary scaffolding using a single-pipe support.
In general, the single-pipe support is made long by connecting (connecting) a plurality of support members of a predetermined length in series in the vertical direction. The connection structure of each support member is as shown in FIG. There are two patterns as shown in 12(b). In FIG. 12A, the tenon member 101 is inserted and fixed to one end (being the upper end side) of the cylindrical pipe 100 that is the strut body of the strut member. The upper and lower edges of the cylindrical pipes 100 of the adjacent strut members are in contact with each other by being inserted into the ends (generally, the lower ends) in a tenon-to-mortise relationship. This is a general connecting structure for supporting members. On the other hand, in FIG. 12B, a cylinder 102 that is slightly larger than that is fixed to one end of the cylindrical pipe 100, and the cylindrical pipe 100 of another adjacent strut member is inserted into the cylindrical body 102 so as to be adjacent. The upper end edges and the lower end edges of the cylindrical pipes 100 of the strut members are contacted and connected.

It is conceivable to connect the pillar members as shown in FIG. 12(b) when it is not desired to use the tenon, for example, when electric wiring is provided inside the pillar. If the tenon member 101 is fixed to the inside of the cylindrical pipe 100 as shown in FIG. 12A, for example, the jack type base metal fitting used to support the single pipe scaffold may interfere. The interference of the jack type base fitting will be described in more detail.
For temporary scaffolding, set the roots at the position closest to the ground. Root entrapment is a cloth material that is mainly installed to reinforce scaffolds. The column member arranged at the lowermost side of the single-pipe column is provided with a binding portion for root entrapment. Further, the jack type base fitting is connected to the column member arranged at the lowermost side. If there are stairs or slopes on the ground where the scaffold is installed, adjust the position of the adjustment nut of the jack type base metal fitting so that the height of the binding part of the adjacent single pipe support is horizontal, but When the adjustment using the base metal fittings is not sufficient, there may be a case where a column member 105 for exclusive use of root entrainment having a short vertical length as shown in FIG. 13 is used. A main body 106 of the support member 105 dedicated to the root entrainment is provided with a binding portion 107 dedicated to the root entrainment.

Here, it is assumed that a tenon member 109 for connecting to the upper strut member 108 is fixed to the upper end of the main body 106 of the strut member 105 dedicated to the root entrainment (shown by a broken line in FIG. 13). Then, in the jack type base metal fitting 110 as shown in FIG. 13, when the protruding amount 113 of the upper side of the screw rod 112 with respect to the adjusting nut 111 is large, the upper portion of the screw rod 112 depends on the thickness of the screw rod 112. There is a case where the lower end of the member 109 is interfered with and the screw rod 112 cannot be advanced upward. Therefore, in order to advance the screw rod 112 above the prop member 105 dedicated to the root without such interference, it is necessary to adopt a connecting structure as shown in FIG. 12B instead of FIG. 12A. ..

[Patent Document 1] Japanese Unexamined Patent Application Publication No. 2017-14803

However, the connection structure as shown in FIG. 12B causes some problems as compared with the connection structure as shown in FIG. For example,
1) In the connection structure as shown in FIG. 12B, the abutting portions of the edges of the upper and lower cylindrical pipes 100 are hidden by the cylindrical body 102 so that they cannot be seen clearly, and therefore foreign matter or the like is not visible between the upper and lower cylindrical pipes 100. It is difficult to check whether it is caught in
2) Rainwater is likely to stay in the gap inside the cylindrical pipe 100, resulting in poor drainage.
3) Since the cylindrical body 102 overhangs the outside of the cylindrical pipe 100 with a slightly larger diameter, the space near the jack type base fitting of the scaffold feels narrow.
4) It is costly and costly to use the connecting structure as shown in FIG. 12B only for the strut members 105 dedicated to the roots. Therefore, other strut members are common to those in FIG. 12B. Although the structure (specification) is desired, there are disadvantages such as 1) to 3).
Etc. Such a problem generally occurs not only in the case of the strut members dedicated to the roots but also in the case of joining as shown in FIG. 12(b).

In order to solve the above-mentioned problem, as a first means, a member for temporary scaffolding is provided for connecting one pillar body having the same diameter in series in the vertical direction to form one long pillar. In the strut member, the strut member for temporary scaffolding has a strut body having an outer peripheral shape having a circular cross section, and an outer circumference of the strut body having four pockets offset by 90 degrees in the circumferential direction of the strut body. And one or more tightly-bonded portions formed on the support body, and a plurality of metal rod members protruding from the upper end of the support body and arranged at equal intervals are fixed to the outer periphery of the support body. I chose

In this way, the bar members arranged at equal intervals of two or more project from the upper end of the strut body, so that the lower end of the strut body disposed above the upper end of the strut body is brought into contact with the upper end of the strut body. At this time, these rod members can surround the part of the main body of the strut located above and near the lower end, so that the strut members are connected in series in the vertical direction without using the relationship between the tenon and the tenon. It becomes possible to do.
Further, since it is surrounded by two or more rod members, it is easy to visually recognize the contact state of the upper and lower end portions of the pillar body between the pillar members from the gap, and rainwater does not stay due to the gap. Further, since only the rod member is arranged around the pillar main body, there is little pressure on the surroundings and the space does not feel narrow.

Here, the “temporary scaffold” has a basic skeleton formed of a plurality of columns and a plurality of cloth materials laid on the columns. A scaffolding board for workers to walk on is erected on this. Members such as diagonal members and stairs are arranged as necessary depending on the situation of the site.
"Connecting the column bodies of the same diameter in series in the vertical direction" is because the column bodies of the column members having commonality are used to form columns and the outer circumferences are smoothly connected. However, irregularly, it is permissible that a column body having a different diameter is mixed with another column body having the same diameter.
The “post” is a long body in which the pillar bodies of the pillar members as members for temporary scaffolding are connected in series in the up-down direction, and the number and arrangement position of the pillars and their lengths are set in the temporary scaffolding. It is a ward depending on the position.
In the following description, when referred to as "the strut body of the strut member", it is the body of the strut member to which the present invention is applied, and this is the first strut member, and other strut members are arranged in series above the first strut body. Is connected as a second support body.
Further, the scaffold as a whole may include not only the pillars supported by the jack-type base metal fittings but also the pillars supported by the fixed-type base metal fittings.
Here, in the case of 3 or more, the "one or two or more binding portions" are arranged with a certain spacing between the binding portions, and it is good for the scaffold construction to have the same spacing, but not necessarily. Not all strut members have the same number of ties. For example, the binding part where the cloth material for root binding is erected is irregularly arranged at the bottom of the scaffolding, so that the distance between the upper binding part and the adjacent upper binding part is smaller than that between the normal binding parts. Is narrowing. It is also possible to use strut members having different intervals even for a normal binding portion that is not a binding portion for root entrapment.
For example, "4 pockets of tightly bound parts that are offset by 90 degrees in the circumferential direction of the strut body" are, for example, pockets that are offset by 90 degrees at the same height position on a collar-shaped plate, or each pocket is an independent wall portion. It may be surrounded. Further, even if all the pockets have the same height, for example, the heights of the adjacent pockets may be shifted in the vertical direction, and the heights of the pockets facing each other by 180 degrees may be the same. It is preferable that the pockets have the same size and shape, but the pockets do not have to have the same size and shape as long as the cloth material can be installed.

In the present invention, the “rod member” is preferably a long metal body whose longitudinal direction is sufficiently longer than the lateral (width) direction. For example, even if it is straight, there may be a bent or curved part in the middle. The cross-sectional shape of the rod member may be circular or any other shape, for example, square. It may be solid or pipe-shaped. It may be a rod member having a curved portion along the circumferential direction of the strut body of the strut member arranged above the strut body of the strut member. The point is that it should be projected so as to surround the strut body of the strut member disposed above the strut body of the strut member, and the distance between the added rod member and another certain member is the circumference of the strut body. It suffices if there is sufficient direction and the contact state of the upper and lower end portions of the strut body between the strut members can be visually recognized sufficiently from the surroundings. However, it is preferable that the total length of the lateral widths of the rod members at the positions intersecting with the upper ends of the column main bodies is half or less of the circumferential length of the outer periphery of the column main bodies.
There are a plurality of rod members. This is because if there are a plurality of columns, the column body of the column member arranged above the column body of the column member can be surrounded. For example, when the two rod members are arranged at positions facing each other by 180 degrees (that is, at equal intervals), the column members of the adjacent column members arranged above the column bodies of the column members held by the rod members are If there is a width in the transverse cross-section direction that faces, the adjacent strut bodies that are sandwiched between them and that are arranged above the strut body are held sufficiently without falling off. “Having a width in the cross-sectional direction” means that, for example, the cross-sectional shape of the rod member is square, or the curved portion of the strut member arranged above the strut body of the strut member along the circumferential direction of the strut body. Is the case. When the number of rod members is three, the number of rod members is held more stably than when the number of rod members is two. Further, if the number of rods is three or more, it is preferable that the rod main body can be surrounded by three or more points without the width in the cross-sectional direction as described above. In this case, for example, the rod member may have a circular cross section.
If the number of rod members is too large, processing cost and material cost for fixing the rod members will be increased, and it will be difficult to visually recognize the contact state of the upper and lower ends of the column bodies of the column members. Therefore, it depends on the thickness of the rod members. However, 4 is the best, corresponding to the number of pockets. The plurality of bar members may have the same length, but may have different lengths.
The meanings of these terms are the same below.

As a second means, the rod member is formed in a linear shape, and is fixed so as to be parallel to the axial direction of the strut body.
In the case of such a rod member, it projects from the upper end of the strut body along the outer periphery of the strut body of the strut member, and is arranged in the axial direction of the strut body of the strut member of the same diameter arranged above the strut body of the strut member. Along the longitudinal direction of the rod members, the rod members are extended at a close position, so that at least the number of rod members should surround the column body of the column member that is surely erected inside even if the width is narrow. You can If the linear rod member is not fixed parallel to the axial direction of the strut body but is fixed obliquely thereto, for example, the rod member is attached to the strut body of the strut member that is erected inside to be surrounded. It is inferior in terms of reliable siege because it is surrounded without necessarily approaching. This means also applies to the following fifth means.

As a third means, the rod member is arranged at the boundary position between the pockets.
With this arrangement, when the cloth material is locked to the pocket from above, the rod member is located at the boundary position between the pockets offset from the upper position where it interferes with the cloth material. The bar member does not get in the way when it is stopped. Therefore, there is a margin above the pocket, and it is not necessary to unnecessarily take a large area above the pocket.
When the rod member is arranged at the boundary position between the pockets, it is preferable to arrange it at all boundary positions. This means also applies to the following fifth means.
As a fourth means, the total length of the lateral widths of the rod members at the positions intersecting with the upper ends of the column main bodies is set to be half or less of the circumferential length of the outer periphery of the column main bodies.
In other words, even if the number of rod members increases, half of the circumference of the column main body is always exposed without being surrounded, and it is sure to check whether there is any foreign matter caught between the upper and lower columns. It is possible and rainwater does not stop. This means also applies to the following fifth means.

As a fifth means, a column member for temporary scaffolding, which is a member for temporary scaffolding, and is for constructing one long column by connecting columnar bodies having the same diameter in series in the vertical direction. The strut member is formed on the outer circumference of the strut body having a strut body having an outer peripheral shape with a circular cross section and four pockets for locking the cloth material that are offset by 90 degrees in the circumferential direction of the strut body. And a plurality of rod members projecting from the upper end of the strut body are fixed to the outer circumference of the strut body, and are made of metal for surrounding the strut body. A ring member is connected to each of the rod members.
As a result, similarly to the means 1, it is possible to connect the support members in series in the vertical direction without using the relationship between the support members and the tenon.
Further, since it is surrounded by two or more rod members, it is easy to visually recognize the contact state between the upper and lower end portions of the pillar body between the pillar members from the gap, and rainwater does not stay because of the gap.
Further, by connecting the ring member so as to intersect with the rod member, a solid enclosure that surrounds the strut body of the strut member disposed above the strut body of the strut member is formed. Unlike the first means, the strut bodies of the strut members arranged by the ring members are supported so as not to fall off even if the intervals between the rod members are not necessarily equal.

Here, the "ring member for surrounding the pillar main body" is an endless member that connects the rod members in a curved manner, and is preferably made of a metal body. The cross-sectional shape may be circular or any other shape, for example, square or plate. It may be solid or pipe-shaped. For example, the entire structure may be a tubular shape or a washer shape without thickness. Although the ring member is connected to each rod member, it may not be connected at the same height position. The ring members may or may not have the same height over the entire circumference.
The ring members may be connected at the upper end positions of the rod members. Thereby, a space in the region of the bar member below the ring member can be secured, and for example, the contact state of the upper and lower ends of the pillar bodies of the pillar members can be visually recognized. In addition, when the ring member is fixed by welding, it is easy to fix the ring member.

As a sixth means, the ring member is provided with a second engaging portion that is engaged with the first engaging portion on the side of the pillar member that is disposed on the upper side and that prevents the second engaging portion from falling off. I did it.
By such means, it is possible to prevent the other strut members connected to the strut member from falling out by pulling out.
As the fixing means, for example, an engaging groove is formed on the side of the ring member, and a protrusion formed on the side surface of the pillar body on the side of the other pillar member is relatively rotated in the circumferential direction of the pillar body. In some cases, for example, through holes may be formed on the side of the ring member and projections formed on the side surfaces of the column bodies on the other column member side may be engaged to prevent pulling out. The protrusion is, for example, a part of a connecting member for connecting the tenon and the mortise to prevent the pillar member from being pulled out, and is used not only for connecting the mortise and the mortise. Thus, the support member can be prevented from being pulled out by engaging with the ring member. “Pulling out” means that the connected pillar members are separated from each other when the erected scaffold is lifted up or down or greatly deformed by an earthquake or a strong wind.
As the fixing means, for example, through holes are formed in the strut bodies on the ring member side and the other strut members side, respectively, and the through holes are collated with each other so that a rod-shaped member (for example, pin or nail) is driven. Good.
As a seventh means, the rod member is provided with a second engaging portion that engages with the first engaging portion on the side of the pillar member disposed on the upper side and prevents the rod member from dropping upward. I was supposed to.
By such means, it is possible to prevent the other strut members connected to the strut member from falling out by pulling out. Both the rod member and the ring member may be provided with such means at the same time.
As the fixing means, for example, an engaging piece is fixed so as to intersect the rod member, and similarly to the sixth means, a connecting member for connecting the tenon and the tenon hole to prevent the strut member from being pulled out. You may make it engage this engagement piece in a part.

As an eighth means, in the temporary scaffolding, the pillar body is supported on a jack-type base metal fitting, and a cloth material for catching a root is laid on the binding portion.
That is, it is asserted that the column member for the temporary scaffold of the present invention is preferably the member that is supported on the jack-type base metal fitting, which is the lowermost side of the scaffold. Particularly preferable is the case where the screw rod portion projects upward from the pillar body of the lowermost pillar member when the jack type base fitting is mounted. This is because the strut members of the present invention are not connected in a tenon-to-mortise relationship, so that the interference of the screw rod is eliminated.

According to the present invention, it is easy to visually recognize the abutting state of the upper and lower end portions of the strut body between the strut members from the gap between the rod members, and the strut members can be moved in the vertical direction without using the relationship between the tenon and the tenon. It is possible to connect them in series.

It is a pillar member for temporary scaffolding of embodiment of this invention, (a) is a top view, (b) is a front view. The perspective view of the pillar member for temporary scaffolding of the same embodiment. (A)-(c) is explanatory drawing explaining the process at the time of connecting another pillar member to the pillar member for temporary scaffolds of the same embodiment. (A) And (b) is explanatory drawing explaining the process at the time of locking a cloth material further from the state of FIG. A pillar member used for constructing a temporary scaffold, (a) is a perspective view of a root member supporting member, (b) and (c) are perspective views of a pillar member not for root members. It is explanatory drawing of the lock metal fitting periphery at the time of the cross section taken along the line AA of FIG.5(b), (a) is the state which the pin advanced in the support body, (b) pulls a main body plate and supports a pin. The state where the pin is retracted from the main body, and (c) is the state in which the pin is rotated counterclockwise from the state of (b). The schematic diagram of the temporary scaffold constructed using the pillar member for temporary scaffolds of an embodiment of the invention. The perspective view of the cloth material used for the temporary scaffolding of FIG. The front view of the jack type base metal fitting used for the temporary scaffolding of FIG. It is the pillar member for temporary scaffolding of other embodiment of this invention, (a) is a perspective view, (b) is a top view. The perspective view of the bar member used for the pillar member for temporary scaffolding of other embodiment of the present invention. (A) And (b) is explanatory drawing explaining the connection structure of the support|pillar member in a single pipe support|pillar. Explanatory drawing explaining the case where a jack type base metal fitting cannot be used with the support|pillar member for roots which has a tenon.

Hereinafter, an embodiment in which a pillar member for a temporary scaffold of the present invention is embodied will be described with reference to the drawings.
FIG. 1 and FIG. 2 show a strut member 1 for root entrapment as an example of a strut member for temporary scaffolding. The pillar member 1 is a pillar member arranged at a position closest to the ground surface S in a temporary scaffold T described later.
The column member 1 includes a column body 2 made of metal. The column main body 2 is formed in a cylindrical shape having upper and lower openings of a perfect circle, and in the present embodiment, the overall length is 180.0 mm, the outer diameter is 50.0 mm, the outer periphery is 157 mm, and the thickness is 2.5 mm. ..
A metal binding portion 3 is fixed by welding to the outer peripheral surface of the strut body 2 near the lower end. In the present embodiment, as an example, the binding portion 3 is formed from the lower end surface of the column main body 2 to a position of 40.5 mm to 81.0 mm. The binding portion 3 is configured by combining four holders 4 made of a metal plate bent in a U shape in a plan view. In the present embodiment, the thickness of the metal plate forming the holder 4 is 3.5 mm as an example. The holders 4 are arranged at the same height position, offset by 90 degrees. The upper and lower edges of each holder 4 are arranged on the same plane, and the upper and lower edges are parallel. At least the upper end may be flush with the same plane.
A pocket 5 is formed by the outer peripheral surface of the pillar body 2 and the inner surface of the U-shaped holder 4 in a state where the four holders 4 are fixed around the pillar body 2. The pockets 5 communicate with each other in the vertical direction. Each holder 4 is composed of a substantially square front plate 4a and side plates 4b bent 90 degrees to the left and right. The side plate 4b is configured such that the front-rear width gradually decreases from the upper side to the lower side. Therefore, the pocket 5 is narrowed (closed) from the opening on the upper side toward the opening on the lower side. A through hole 6 is formed in the front plate 4a as a means for reducing the weight.
There are two types of holders 4 having different edge shapes in contact with the column main body 2 (hereinafter, in the description of the binding portion 3, they are distinguished as 4A and 4B due to the difference in edge shape). All have the same shape. The holder 4A has a shallow notch at the upper and lower edges, and the holder 4B has a shallow notch at the center, leaving the upper and lower edges. The two holders 4 having the same edge shape are arranged at positions displaced by 180 degrees in the circumferential direction of the column main body 2. Each of the holders 4A and 4B is combined with the adjacent holders 4A and 4B in such a manner that the end portions of the holders 4A and 4B are staggered (so as not to interfere with each other) so that the end portions of the support body 2 are abutted to each other so that the intersecting portions are hidden. (Figs. 1 and 2 are in a state before being welded, and in the fixed state, the bead of the welding makes the intersection part invisible). The reason why the edge portions of the adjacent holders 4A and 4B intersect with each other in this manner is to make the lateral width of each of the holders 4A and 4B as wide as possible to enlarge the pocket 5.

Four metal pins 10 of the same length as a rod member are fixed to the outer peripheral surface of the column main body 2 near the upper end. The pin 10 is a solid circular columnar body formed in a straight line shape (straight), and has a total length of 60.0 mm and a diameter of 8.0 mm as an example in the present embodiment. The pin 10 is fixed to the outer peripheral surface of the column main body 2 by welding along the axial direction of the column main body 2 (that is, parallel to the longitudinal direction). The pins 10 are arranged so as to be evenly spaced at the phase positions deviated by 90 degrees around the column main body 2, and the arrangement position is just above the crossing position of the holders 4A and 4B in the binding portion 3. There is.
Each pin 10 is fixed along the outer peripheral surface of the column main body 2 and protrudes upward from the upper end 2a of the column main body 2 by the same amount. In the present embodiment, about 35 mm, that is, slightly more than half of the entire length, extends above the column main body 2. Since the pillar body 2 having an outer circumference of about 157 mm is surrounded by four cylindrical pins 10 having a diameter of only 8.0 mm, the visibility around the upper end 2a of the pillar body 2 is good.

A metal cover 11 as a ring member is fixed to the upper end of the pin 10 by welding. The cover 11 is a perfect circular cylinder. In the present embodiment, as an example, the height is 90.0 mm, the inner diameter is 50.5 mm, and the thickness is 8.0 mm. The lower end of the cover 11 is formed with notches 12 that are offset by 90 degrees, and four pins 10 are accommodated in the notches 12 (in each figure, the mounting state before welding). However, the cutout 12 is actually invisible in the welded bead in the fixed state). By disposing the pin 10 in the notch 12 in this manner, it is possible to easily establish a predetermined phase relationship between the binding portion 3 and the cover 11 during assembly.
A part of the cover 11 is cut out to form a groove 13 in a passage shape. The groove portion 13 extends from the upper end of the cover 11 to the vicinity of the lower end thereof, and is formed so as to be bent in the circumferential direction from the vicinity of the center of the cover 11 to the lower end of the groove portion 13 and has an inverted L-shape having a bent portion as a whole. It looks like. In the present embodiment, the inner upper portion (horizontal portion of the groove 13 in FIG. 1B), which is bent by expanding in the circumferential direction in the groove portion 13 in the circumferential direction, is used as the engaging portion 14. The vertically extending straight line portion, which is the deepest position of the bent groove portion 13, is a regulation portion 15 with which a support plate 35 for supporting a lock fitting 31 described later interferes. The engaging portion 14 and the restricting portion 15 are connected to the upper side of the strut member 1 for rooting as will be described later, and the strut member 21C of FIG. It extends in the circumferential direction according to the position. The vertical length of the restriction portion 15 is formed slightly longer than the vertical width of the support plate 35 (it must be at least long so as not to interfere).
As shown in FIG. 1B, the groove 13 is formed at a position straddling the adjacent holders 4 in plan view. The bending position of the groove portion 13 is near the center of the one holder 4, and the engaging portion 14 is formed in the circumferential direction from that position. The left and right width of the groove 13 is formed to be slightly longer than the left and right width of the main body plate 32 (it must be at least long so as not to interfere).
The surface of the restriction portion 15 is aligned with the inner surface of the side plate 4b of the holder 4A on the front side in FIG. 1B in plan view.
The distance between the lower end 11a of the cover 11 and the upper end 3a of the binding portion 3 (that is, the holder 4) is configured to be longer than the length of the wedge piece 42 of the cloth material 41 described later. However, the distance between the lower end 10 a of the pin 10 and the upper end 3 a of the binding portion 3 is shorter than the length of the wedge piece 42.

Next, a method of using the strut member 1 for root entrainment according to the embodiment will be briefly described together with a structure of a temporary scaffold T called a so-called single-pipe scaffold (or one-side scaffold) in which a concrete installation is performed.
First, a member for scaffolding used for constructing the temporary scaffold T other than the above-mentioned strut member 1 for root entrainment will be briefly described.
FIG. 5(a) shows a conventional strut member 21A for root entrainment. 5(b) and 5(c) show the pillar members 21B and 21C which are not for root entrainment (that is, not supported by the jack type base fitting 45).
First, a conventional strut member 21A for root entrainment will be described.
The root strut member 21A includes a strut body 22 made of metal. The strut body 22 is the same pipe as the strut member 1 for root entrainment, and is different only in length. Tightening portions 23 (hereinafter, referred to as 23A to 23C from below) are fixed to the pillar body 22 by welding at three separate positions in the vertical direction. The shape of each of the binding portions 23A to 23C is the same as that of the binding portion 3 of the support member 1 for root entrapment, and thus the description thereof is omitted. The lowermost binding portion 23A is disposed at the same height as the binding portion 3 formed on the above-mentioned root strut member 1 from the lower end position. In other words, the binding portion 23A is exclusively used for locking the cloth material for root binding. The distance between the tightly bound portion 23A and the central tightly bound portion 23B above it is 450 mm in the present embodiment. The distance between the central and upper binding portions 23B and 23C is a distance that serves as a reference for the pillar members 21 in the temporary scaffold T (hereinafter, this is referred to as a reference distance), and is 900 mm in the present embodiment. That is, in the temporary scaffold T, the binding portions 23A for locking the cloth for root entrainment are arranged at intervals smaller than the reference interval (including the strut member 1 for root entrainment). The orientation (phase) of the holder 24 of each of the binding portions 23A to 23C is the same.
A tenon 25 is fixed to the upper end position of the column main body 22 by welding. A through hole 26 for pulling-out prevention (locking) is formed near the base of the tenon 25. The tenon 25 is connected by using the lower end opening of the strut body 22 of the other strut member 21 as a tenon.
The length of the support member 21A for entrapment is an example, and other length sizes can be prepared. In that case, since the tightly bound portions 23 always increase with the reference interval, the length basically increases in a discrete manner according to the reference interval (discontinuously increases).

Next, the column members 21B and 21C that are not for root entrainment will be described. These are members used in layers above the root-supporting column members 1 and 21A. The longer one in FIG. 4B is the first strut member 21B, and the shorter one in FIG. 4C is the second strut member 21C. The second strut member 21C has the same structure as the first strut member 21B except that the strut body 22 has a short size (that is, half the size of the first strut member 21B), and the number of the binding portions 23 is one. Therefore, the detailed description of the second support member 21C is omitted by using the same reference numerals.

As shown in FIG. 5B, the first strut member 21B includes a strut body 27 made of metal. The pillar body 27 is the same pipe as the pillar members 1 and 21A for root entrainment, and is different only in length. Tightening portions 28 are fixed to the pillar main body 27 by welding at upper and lower two places at a reference interval. The shape of each binding portion 28 is the same as that of the binding portions 3 and 23A to 23C of the strut member 1 for root entrainment, and therefore description thereof is omitted. A tenon 29 is inserted at the upper end position of the column main body 27 and fixed by welding. The tenon 29 has the same shape as the tenon 25. A through hole 30 for locking is formed near the base of the tenon 29. The tenon 29 is connected with the lower end opening of the column main body 27 of the other column member 21B as a tenon. A lock fitting 31 is formed at a position near the lower end of the column main body 27. As shown in FIGS. 6A and 6B, the lock fitting 31 includes a main body plate 32, a lock pin 33 fixed to the main body plate 32, and a lock plate 34 also fixed to the main body plate 32. The lock fitting 31 is arranged on a support frame 35 fixed to the outer circumference of the column main body 27. The lock fitting 31 is constantly pressed against the pillar main body 27 side by the spring force of the coil spring 36 in the support frame 35, and the main body plate 32 is placed on the support frame 35 in the pressed state. The lock pin 33 can be retracted from the through hole 37 to the pillar main body 27 side, and the tip end thereof is advanced to the pillar main body 27 when the main body plate 32 is mounted on the support frame 35. The through hole 37 is formed at a position to be matched with the through hole 26 of the tenon 25, 29 when the tenon 25, 29 is inserted into the lower end opening of the column main body 27. The tip of the lock pin 33 is formed with a slantingly cut guide surface 33a, which is directed upward in which the tenons 25 and 29 are inserted.
This is an example, and other length sizes having different reference intervals can be prepared. In that case, since the tightly bound portion 28 always increases with the reference interval, the length basically increases in a discrete manner according to the reference interval (discontinuously increases).

When connecting the column members 21B and 21C to each other or to the column member 21A for root entrainment, the locking member 31 is used to lock the connection structure between the tenon and the mortise hole so that it cannot be pulled out. To
Therefore, first, the worker arranges the through hole 37 and the through holes 26 of the tenons 25 and 29 in the same phase position in the circumferential direction with respect to the lock fitting 31 with the lock pin 33 protruding, and the tenon 25, Insert 29. Then, since the guide surface 33a of the lock pin 33 hits the tenons 25 and 29 and is pushed back (that is, the state of FIG. 6B), the tenons 25 and 29 can be advanced as they are, and the through holes 37 and 26 are aligned with each other, thereby locking. Since the pin 33 again projects by the urging force of the coil spring 36, the tenons 25 and 29 are automatically locked.
On the other hand, when removing the column members 21 in the connected state, the operator grasps the main body plate 32 of the lock fitting 31 as a “knob” to bring the lock pin 33 into the non-advanced state as shown in FIG. The lock fitting 31 is rotated counterclockwise to engage the lock plate 34 between the main body plate 32 and the support frame 35 (state of FIG. 6C). That is, the lock fitting 31 is locked in the non-advanced state. In this state, the locked states of the tenons 25 and 29 are released, so that the tenons 25 and 29 are removed, and then the lock fitting 31 is returned to the state of FIG. 6(a).

FIG. 8 shows a cloth material 41 as a beam member. The cloth material 41 is a metal pipe member having a circular cross section, and wedge pieces 42 are fixed to both ends thereof. In this embodiment, the length is 1800 mm.
FIG. 9 shows a jack type base fitting 45. The jack-type base metal fitting 45 is a member arranged at the bottom of the temporary scaffold T having a base plate 46, a solid or hollow screw rod 47, and an adjusting nut 48 as basic components. The adjusting nut 48 is provided with a nut body 51 having a screw portion (not shown) having a female thread relationship with the threaded rod 47 which is a male thread on the inner periphery thereof, and a position facing the nut body 51 by 180 degrees. The handlebar 52 is integrally formed. A ring-shaped ceiling portion 53 is formed on the upper surface of the adjusting nut 48. In the present embodiment, the strut members 1 for root entrainment and the strut members 1, 21A for root entrainment are erected on the ceiling portion 52.

Next, the outline of the temporary scaffold T will be described.
As shown in FIG. 7, the temporary scaffold T is constructed on the ground surface S having a step in the middle. The temporary scaffold T is composed of a plurality of columns P selectively connecting the above-described column members 1, 21A to 21C supported by the jack-type base metal fitting 45 in accordance with the height of the ground surface S, and the tightly bound portions 3 and 23A. 23C and 28, a plurality of cloth materials 41 horizontally installed. In this embodiment, the ground surface S1 is on the higher side and the ground surface S2 is on the lower side. In addition, in FIG. 7, the structure outline of the two-dimensional temporary scaffolding T only in the direction parallel to the building (not shown) is illustrated, but in the actual erection scaffolding, the cloth material (not shown) is also shown in the back direction of the drawing. It shall be erected and the scaffold shall be constructed in three dimensions. In this embodiment, since the support member 1 for root entrapment is particularly focused on, other members that are usually arranged on the temporary scaffold T, such as scaffold boards, diagonal members, and stairs are not shown. Further, the plurality of cloth materials 41 are shown by solid lines only in the lowermost part for root entrainment, which is directly related to the present invention, and the upper (upper) cloth materials 41 are shown by broken lines.
In the present embodiment, the support pillar P installed on the ground-side surface S1 on the higher side starts from the support member 1 for root entrainment supported by the jack type base fitting 45 at the first stage. On the other hand, the support pillar P installed on the ground surface S2 on the lower side starts from the support member 21A for supporting the root shown in FIG. As described above, when the ground surface S1 and the ground surface S2 have a considerably large difference in height, that is, when the jack-type base metal fitting 45 is physically or legally impossible, a different strut member for rooting, 21A, is provided. use. It is not necessary to use a different strut member for root entrainment, 21A, as long as the height can be absorbed by the jack type base fitting 45.
The height of the binding portion 3 of the root strut member 1 is adjusted by the jack type base metal fitting 45 so as to be the same height as the binding portion 23B of the root strut member 21A. First, the column member 21C of FIG. 4C is connected to the upper side (second stage) of the column member 1 for root entrainment of the ground surface S1 on the higher side. The column member 21B of FIG. 4B is connected to the upper side (third stage) of the column member 21C. At this time, the screw rod 47 of the jack type base metal fitting 45 extends through the strut body 2 of the strut member 1 for root entrainment to the strut body 27 of the strut member 21C.
On the other hand, since the support member 21A for root entrainment installed on the ground surface S2 on the lower side has the same height as that of the support member 21C on the ground surface S1 on the higher side by only one (one step) Eye), and the column member 21B of FIG. 4B is connected to the upper side (second step). Since the strut main body 22 of the strut member 21A for root entrapment has a length long enough to allow the screw rod 47 of the jack type base fitting 45 to advance (the strut body 22 is longer than the screw rod 47), the screw rod 47 does not project upward beyond the strut member 21A for root entrainment.
In this way, the height difference near the ground is changed by using the strut members 1 and 21A to 21C having different length sizes, and in addition, the height adjustment is slightly performed by the jack-type base metal fitting 45, so that at least three steps are provided. After the eyes, all columns of columns P can be constructed by column members having the same length, for example, column members 21B in FIG. 4(b). In the construction state of the temporary scaffold T, the orientation (phase) of the holders 4 and 24 of the binding portions 3, 23A to 23C and 28 is arranged so that the holders 4 and 24 are accurately opposed to each other between the adjacent columns P, and the cloth material 41 The wedge piece 42 is driven between the holders 4 and 24 facing each other.

Next, in the temporary scaffold T constructed in this way, a method of using the strut member 1 for root entrainment of the above-described embodiment, particularly a case where the strut member 21C of FIG. 4B is connected upward will be described.
As shown in FIG. 3( a ), the column member 21</b>C is arranged directly above the column-member-supporting column member 1. At that time, a phase position (that is, a position above the groove 13 above the groove 13 of the cover 11) is checked so that the main body plate 32 of the lock fitting 31 of the pillar 21C does not interfere with the cover 11 of the strut member 1 for root entrainment. ). Then, from that state, the support member 21C is relatively moved closer to the support member 1 for root entrainment (for example, the support member 21C side is lowered). Then, the strut body 27 of the strut member 21C passes through the inside of the cover 11 of the strut member 1 for root entrainment, and the lower end 27a of the strut body 27 is brought into contact with the upper end 2a of the strut body 2 of the strut member 21C. Becomes Then, in this state, (the body plate 32 of) the lock fitting 31 is arranged at a position near the lower end of the groove portion 13 (state of FIG. 3B). Then, in this state, the support member 21C is relatively rotated (in FIG. 3C, the root support member 1 is illustrated as being rotated), and the lock fitting 31 is supported. The supporting plate 35 in contact is brought into contact with the regulating portion 15 (state of FIG. 3C). This completes the connection. At this time, the phase of the holder 24 of the tightening portion 28 of the strut member 21C matches the phase of the holder 4 of the tightening portion 3 of the strut member 1 for root entrainment in the circumferential direction (state of FIG. 7).
In this way, by connecting the strut member 21C to the root strut member 1 and the strut member 21C is in a locked state, the main body plate 32 of the lock fitting 31 contacts the engaging portion 14 against an upward pulling force. The pillar members 21C are prevented from coming out by coming into contact with each other. As described above, in the root strut member 1, the lock member for connecting the strut members in the relation of the tenon and the tenon is usually used as the lock member even when the tenon is not in the relation of tenon.

Further, when the cloth material 41 is erected on the binding portion 3 of the strut member 1 for root entrainment between the adjacent struts P after the steps of FIGS. 3A to 3C, it is shown in FIG. 4A. As described above, the wedge piece 42 of the cloth material 41 is arranged right above the holder 4 to which the binding portion 3 is locked. At this time, the wedge piece 42 is arranged below the lower end 11 a of the cover 11. Further, this arrangement position is a position overlapping with the pin 10. However, since the pin 10 is located just at the intersection of the holders 4 (4A, 4B) of the binding portion 3, the wedge piece 42 does not interfere with the pin 10 as shown in FIG. The outer surface of 42 can be brought into contact with the side surface of the pillar main body 2 of the pillar member 1 for root entrapment. That is, the wedge piece 42 can be accurately arranged directly above the holder 4 without the pin 10 becoming an obstacle. Then, the cloth material 41 is lowered to insert the wedge piece 42 into the holder 4, and the wedge piece 42 is hit with a tool (for example, a hammer) from above the wedge piece 42 and locked (the state of FIG. 4B). Here, the work of locking the wedge piece 42 to the holder 4 in only one direction has been described, but the pin 10 does not interfere when the wedge piece 42 is arranged above the holder 4 in all four directions.

With the above configuration, the support member 1 for root entrainment of the present embodiment has the following effects.
(1) In the case of using the pillar member 1 for root entrainment having a short length due to the difference in height of the ground surface S in the temporary scaffold T, the adjustment nut 4 of the jack type base fitting 45 has a lower position of the screw rod 47. In the case of (1), the threaded rod 47 may penetrate through the column main body 2 (that is, the adjustment nut 4 is in the lower position of the threaded rod 47). In the strut member 1 for root entrainment of the present embodiment, the strut member 21C arranged above is not connected in a tenon-to-mortise relationship, and the strut bodies 2 and 27 communicate with each other. It is possible to freely move back and forth through the pillar bodies 2 and 27.
(2) Since the strut member 1 for root entrainment can firmly visually recognize the contact portions (upper end 2a and lower end 27a) between the strut bodies 2 and 27 with the strut member 21C arranged above, the strut body 2 can be correctly seen. , 27 are easily connected to each other.
(3) Since the pin 10 is arranged just at the crossing position of the holder 4 (4A, 4B) of the tight binding portion 3, the pin 10 interferes because it is arranged right above the holder 4 for locking the wedge piece 42. The wedge piece 42 does not interfere with the engagement of the holder 4 with the pocket 5.
Here, if the pin 10 is arranged at a position where it will be in the pocket 5 of the holder 4, the wedge piece 42 will not be able to prevent the pin 10 from interfering with the pin 10 and some measure (for example, a wedge piece). The width of 42 is made narrower than the conventional one, the pocket 5 is made smaller, and the space between the binding portions 3 and 28 is made longer by all the strut members, etc.). As described above, unless the pin 10 is arranged at the position of the pocket 5 of the holder 4, it is not necessary to change the standard size different from the conventional product. Of course, if the column main body 2 is elongated so that the distance between the lower end 10a of the pin 10 and the upper end 3a of the binding portion 3 is longer than the length of the wedge piece 42, it is not necessary to consider the position of the pin 10 in this way. However, the position of the tightening portion 3 needs to be aligned with the tightening portion 23A of the strut member 21A for root entrapment that already exists as a standard size, and the strut body 2 is simply provided because of the connectivity with other standard size strut members. Is difficult to lengthen.
(4) Since the support member 1 for root entrainment is provided with the locking means (the engaging portion 14 formed in the groove 13 and the lock fitting 31) for preventing the connected support member 21C from being pulled out, the pulling force acts. Even if the column member 21C does not fall off. Further, the strut member 21C is locked by simply rotating the strut member 21C relative to the root strut member 1 in the circumferential direction, and the phase of the tightly bound portion 3 is the other tightly bound portions 3, 23A of the temporary scaffold T. Since the phases are aligned with those of 23C and 28, workability is also good.
The lock fitting 31 is originally a member that engages with the tenons 25 and 29, but since it is also a member that projects (projects) to the outside, the temporary scaffold T does not require any special engagement means. Locking means can also be provided on the strut member 1 for root entrapment by using the lock fitting 31 which is a conventional standard.
(5) The strut member 21C is surrounded not only by the pin 10 of the strut member 1 for root entrainment but also by the cover 11 and is held in a considerably wide range in the longitudinal direction. Hateful.
(6) The pins 10 are all connected in the circumferential direction by the cover 11, so that the upper portions of the pins 10 are not cantilevered but are rigid.

The above-described embodiments are merely described as specific embodiments for illustrating the principle and concept of the present invention. That is, the present invention is not limited to the above embodiment. The present invention can also be embodied in the following modified modes.
The form of the strut member 1 for root entrainment in the above-mentioned embodiment is an example, and it is also possible to implement it in other forms. For example,
1) Configure the pin 10 with two or four or more pins. Even if the number of the pins 10 is two, it is possible to connect the column members 21C if there is a ring-shaped member such as the cover 11 on the upper part.
2) Change the vertical length of the cover 11 and the shape of the groove 13. In the above-described embodiment, the cylindrical shape is used, but the ring shape is not limited to the cylindrical shape. For example, the ring having the circular cross section may be fixed to the upper portion of the pin 10.
3) Change the shape of the binding portion 3. As for the shape of the binding portion, there are various types such as different heights of adjacent holders and collar-shaped ones in addition to the case where the holders are at the same height as in the present embodiment. However, the present invention is applicable.
4) To change the length and diameter of the pillar body 2. If there is a change in the standard size or the like, the above size may be changed.

-As shown in FIG. 10, it is also possible to use the support member 1 for root entrainment without having a ring part like the cover 11. In FIG. 10, by removing the cover 11 and making the pin 10 a little longer, the stability of the pillar member 21C installed above is secured. Even with such a shape, it is possible to connect the column members 21C. Then, the same effect as that of the above-described embodiment is obtained.
In this case, instead of the pull-out preventing means formed on the cover 11, the engaging claw 61 is fixed to the pin 10, and the lock fitting 31 is engaged with the engaging claw 61 to prevent the column member 21C from being pulled out. be able to.
In the above embodiment, the engaging portion 14 of the groove 13 serves as the locking means so as to interfere with the support plate 35 of the lock fitting 31, but the portion other than the support plate 35, for example, the main body plate 32 may be interfered with. May be.
In FIG. 10, the separate engaging claw 61 is fixed, but the bar member is processed (that is, not linear but bent) to integrally form the engaging claw. May be.
In the above-described embodiment, the strut member 1 for root entrainment is configured to prevent the pull-out by using the lock fitting 31 of the pillar member 21C that is the side to be connected, but there is a choice not to use the lock fitting 31. For example, the lock fitting 31 on the support member 21C side may be removed, the through hole 36 may be exposed, the through holes 26 and 36 may be collated, and a separately prepared pin member may be inserted. Alternatively, for example, the lock fitting 31 on the side of the column member 21C may be removed, a protrusion protruding outward may be formed inside the through hole 36, the through holes 26 and 36 may be collated, and the protrusion may be inserted into them.
In the above-described embodiment, the cover 11 as the ring member is formed on the upper portion of the pin 10, but only the pin 10 is fixed to the outer periphery of the column main body 2 without the cover 11 and the upper portion from the upper end of the column main body 2 is fixed. You may make it protrude.
When the rod members (in the above, the pins 10) are used at two positions opposite to each other by 180 degrees without using the cover 11 as the ring member, the rod members are not circular in cross section but are connected. It is preferable to use a bar member 51 that is curved and has a width in the lateral direction as shown in FIG. 11 so as to surround the column member (above column member 21C) in the circumferential direction. This is because it is necessary to prevent the column member housed inside from falling off due to the width in the lateral direction. Even if the bar member is not curved, it may be a bar member having a lateral width such as a rectangular cross section.
-The shape of the groove 13 is not limited to the above. There may be various groove portions 13 with which the support plate 35 is engaged even if it is not in the inverted L shape as described above.
-In the above-mentioned embodiment, although it explained as an example applied to the pillar member 1 for root entrainment as a pillar member for temporary scaffolding, a plurality of metal objects arranged at equal intervals protruding from the upper end of such pillar body. If it is a structure having the rod member, it may be used at a position other than the one for root entrapment. This is because the common member can be used by using it as a support member at a position other than the position for root entrainment, so that the cost can be reduced. Further, it can be used when it is better not to have a tenon partly, for example, when wiring is performed inside the column body and it is desired to provide a column member which does not partially use a tenon in the middle of the column.
The present invention is not limited to the configurations described in the above embodiments. The constituent elements of each of the above-described embodiments and modifications may be arbitrarily selected and combined. Further, any constituent element of each embodiment or modification, and any constituent element described in the means for solving the invention or a constituent materializing any constituent element described in the means for solving the invention. And may be combined arbitrarily. With respect to these as well, we have the intention to acquire the right in the amendment or divisional application of this application.
In addition, by applying for a change to a design application, we have the intention to acquire the right for the whole design or partial design. Although the drawing draws the whole of the device with a solid line, it is a drawing that includes not only the entire design but also a partial design claimed for a part of the device. For example, it is a drawing in which a part of the device is included in the partial design, and a part of the device is included in the partial design regardless of the members. The part of the device may be a part of the device, or may be a part of the member.

DESCRIPTION OF SYMBOLS 1... Strut member for rooting as a strut member for temporary scaffolding, 2... Strut body, 3... Bonding part, 5... Pocket, 10... Pin as a rod member, 11... Cover as a ring member, 43... Bonding Tightening holders as parts, P... props, T... Temporary scaffolding.

Claims (7)

In a pillar member for a temporary scaffold that is connected in series in the vertical direction to form a pillar body,
The column member for the temporary scaffold is provided on the outer periphery of the column main body having a metal column main body having an outer peripheral shape with a circular cross section and four pockets offset by 90 degrees in the circumferential direction of the column main body. And one or more binding portions formed,
A plurality of metal rod members protruding from an upper end of the column body are fixed to an outer periphery of the column body, and a ring member is connected to an upper end of the rod member . A column member for temporary scaffolding. .. The ring member is formed with a second engaging portion that engages with the first engaging portion on the side of the pillar member disposed on the upper side and prevents the second engaging portion from falling off. The pillar member for the temporary scaffold according to claim 1. The ring member is formed with a second engaging portion that engages with the first engaging portion on the side of the pillar member disposed on the upper side and prevents the second engaging portion from falling off. A column member for a temporary scaffold according to claim 1 or 2. Said bar member strut member for temporary scaffold according to claim 1, wherein that you have been configured in a straight line. The column member for temporary scaffolding according to claim 4, wherein the rod member is arranged at a boundary position between the pockets so as to be parallel to an axial direction of the column body . Temporary according to the length obtained by summing the width claim 1-5, characterized in half der Rukoto following peripheral length of the strut body periphery at the position crossing the strut body upper end of the rod member A pillar member for scaffolding. The strut body in temporary scaffold is supported on the jack type base bracket for temporary scaffold according to any one of claims 1 to 6 wherein Tightened unit, wherein Rukoto is spanned the beam member for the root cult Support member.

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