JP6543751B1 - Lower frame for frame scaffolding and its end connection fitting - Google Patents

Abstract

An object of the present invention is to provide a lower frame and an end for a frame scaffold which can compactly fold a cross bracing even if it is installed at a cross bracing installed between building frames having narrow installation intervals, and can also be retrofitted to a prefabricated cross bracing. Provide a partial connection fitting.
A lower frame 4 for frame scaffolding is attached to the lower cross beam main body 5 which is horizontally laid around the lower part of the cross brace 2 and at both ends of the lower cross beam main body 5, and is connected to the cross braces 2a and 2a. It comprises the end connection fitting 6. The end connection fitting 6 comprises a slide fitting 7 and a link fitting 8. The slide fitting 7 is slidably attached to the brace 2 a in its longitudinal direction. The link fitting 8 is installed between the end of the slide fitting 7 and the lower rail main body 5 and can be rotated in the plane of the cross brace 2 by the connection bolts 9 and 10 at the end of the slide metallic 7 and lower rail main body 5, respectively. Link.
[Selected figure] Figure 1

Description

  The present invention relates to a lower frame for frame scaffolds and an end connection fitting for lower frames for frame scaffolds, which are installed for the purpose of preventing the fall of workers at crossings of frame scaffolds temporarily installed at construction sites such as construction and civil engineering. In particular, the cross brace can be folded compactly even if it is installed in a cross brace installed between building frames with a narrow installation interval (for example, 1.2 m or less), and it can also be retrofitted to a prefabricated cross brace. It is a thing.

  The frame scaffolding is constructed by erecting the frame of a factory-made unit using predetermined steel pipes at a predetermined interval, securing each frame by cross-bridging, and holding a bracket-clad frame (between adjacent frames) It is temporarily installed in multiple spans and multiple stages by bridging "scaffolding board" below, and is widely used in construction sites such as construction and civil engineering.

  In addition, since a large opening is created between the cross brace between each frame and the scaffolding plate located on the lower side of this type of frame scaffolding, it is possible for workers to work from this opening particularly at high places. There is a risk of falling accidentally and there was a safety issue for workers.

  For this reason, at the time of temporary construction of a frame scaffold, it is obliged to install a lower frame for a scaffold for the purpose of preventing a fall of a worker on a position of height 40 cm or less from a floor surface of a scaffolding board of each floor.

  As the lower frame for this type of framework scaffolding, it can be installed horizontally near the lower part of the cross bracing, if it is attached to the cross bracing and the cross bracing is rotated around the middle rotation pin and opened in an X shape. It is known to fold the brace so that it can be folded along the longitudinal direction of the cross brace.

  For example, in Patent Document 1, a lower part for a scaffold for a framework comprising a lower rail body and both ends of the lower rail body, and a fixing bracket and a slide bracket connected respectively in the vicinity of the end flat portion of the cross brace. Crosspieces are disclosed.

  Briefly explaining, the end flat portion of one cross-striped line passes through the through-hole of the slide metal fitting, and the slide metal fitting is positioned in front of the flat-portion end of the cross straight line.

  The fixing bracket is fixed by a tightening bolt in front of the other flat portion at the end of the other cross bar, and the fixing bracket is a tightening bolt which determines the rotation range of the lower crosspiece body, a tightening bolt serving as a rotation shaft and the fixing bracket itself And hinges for opening and closing the

  In particular, there is a gap between the through hole of the slide metal fitting and the cross brace (see FIG. 4 of Patent Document 1), and the fastening bolt of the fixing metal fitting is the rotation axis of the lower crosspiece main body. The lower bar is adapted to be folded together with the cross brace within a range in which the slide fitting can move relative to the cross brace.

  Further, Patent Document 2 discloses a cross bracing protection bar in which a slide fitting having a frame-like opening is fixed at both ends. The protective crosspiece is slidably attached to the brace by inserting the slide into the lower end of each of the braces opened in the X shape of the cross brace, and the frame-like opening of the slide It is comprised by fixing the metal fitting for prevention of release controlled to the dimension by which the pulling-out of a brace material is prevented at the both ends of guard bars.

  In particular, the lower end of each of the braces opened in the X shape of the cross brace crosses the frame-like opening of the slide fitting, so that the slide fitting is slidably attached to the brace. The protective crosspiece is adapted to be folded together with the cross brace within a range in which the slide fitting can move relative to the bracing material.

Utility model registration No. 3151937 JP-A-11-223011 JP, 2010-275777, A

  The lower frame for frame scaffolding disclosed in Patent Documents 1 and 2 ("Protective bar" in Patent Document 2) is both a through hole of the slide fitting ("Frame-like opening" in Patent Document 2) The gaps between the braces passing through the holes allow the cross braces to be folded only within the range in which the slide fitting can move.

  For this reason, there is an inherent limit in the range in which the lower frame for frame scaffolding can be rotated about the end on the slide bracket side, and it is particularly installed in a cross brace installed between frames with a narrow gap (1.2 m or less) Then, there was a problem that the cross bracing could not be compactly compacted to the end.

  In addition, since it is necessary to pass the bracing from the end to the through-hole of the slide metal fitting in order to install in a ready-made cross bracing, there was a problem that the installation to the prefabricated cross bracing was extremely troublesome or impossible .

  The present invention has been made to solve the above problems, and in particular, the cross brace can be folded in a compact manner even if it is installed in a cross brace installed between building frames (for example, 1.2 m or less) having a narrow installation interval. It is an object of the present invention to provide a lower frame for framework scaffolding which can be retrofitted to prefabricated cross braces.

  The present invention is a scaffold for a scaffold which is placed in the open state in the form of an X-shaped cross and which is placed in the vicinity of the lower part of the foldable cross brace, and is horizontally laid in the vicinity of the lower cross brace. A lower crosspiece main body to be delivered and an end connection fitting respectively attached to both ends of the lower crosspiece main body and connected to the brace, the end connection fitting being slidable in the longitudinal direction of the brace A link fitting installed between the attached slide fitting, the slide fitting, and the end of the lower crosspiece main body, and rotatably connected to the end of the slide fitting and the lower crosspiece main body in the plane of the cross brace And is characterized in that

  In addition, the application range can be expanded by detachably attaching the end connection fitting to the cross brace so that it can be retrofitted to a prefabricated cross brace.

  According to the present invention, in particular, the end connection fitting attached to both ends of the lower crosspiece main body is a slide fitting slidably attached to the cross brace, and between the slide fitting and the end of the lower crosspiece main body The end of the lower rail main body is opposed to the brace by being installed and configured from the slide metal fitting and the link metal fitting rotatably connected to the end of the lower rail main body in the plane of the cross brace. Since it is possible to rotate in two places, the lower rail main body can freely rotate in the range of approximately 180 ° with respect to the brace.

  By this, even when installing at a cross brace installed between building frames in a narrow installation space (1.2 m or less), when folding, compactly fold in a state where it almost completely conforms to the side of the cross brace. Can.

  In addition, since the slide metal fitting is detachably attached to the brace, it is possible to retrofit it to a prefabricated crossed brace.

FIG. 1 (a), (b) is a partial front view of a framework scaffold according to an embodiment of the present invention, in which a framework scaffold lower bar is installed. FIG. 2 is an end view along the line ai in FIG. 1 (a), (b). FIG. 5A is a front view of a cross scaffold and a lower frame for a framework scaffold folded with a cross braid. It is an exploded perspective view of an end connection fitting. It is a cross-sectional enlarged view in FIG. 1 (a), (b). It is another embodiment of this invention, and illustrates the framework scaffold in which the lower scaffold for framework scaffolds was installed, and FIG. 6 (a), (b) is a partial front view of framework scaffold. FIG. 7 is an enlarged sectional view of a blade portion in FIGS. 6 (a) and 6 (b). The slide metal fitting is illustrated, and FIGS. 8A and 8B are a plan view and a side view of the slide metal fitting, respectively. FIG. 9 (a) and FIG. 9 (b) are a plan view and a side view, respectively, of the link fitting.

  1 to 5 show an embodiment of the present invention, showing a part of a frame scaffold. In the figure, a plurality of frames 1 are arranged at predetermined intervals, and the spaces between frames 1 are fixed by crossing braces 2 and scaffolding board 3 is provided between horizontal spaces 1a and 1a of adjacent frames 1 and 1 Are temporarily installed at multiple intervals and multiple stages by bridging.

  The cross brace 2 is configured to be folded by rotating the two braces 2a and 2a around the intermediate connection pin 2b. That is, the two braces 2a and 2a rotate around the connecting pin 2b and open in an X shape (see FIGS. 1 (a) and 1 (b)) and rotate in the opposite direction and close in an I shape (folding Is configured to be folded) (see FIG. 3).

  Further, flat portions 2c, 2c are formed at both ends of each of the braces 2a, 2a, and the flat portions 2c, 2c are connected to the side portions of the vertical lands 1b, 1b of the adjacent construction frames 1, 1 It is installed removably between 1, 1. The braces 2a, 2a are formed of steel pipes smaller in diameter than the horizontal ground 1a and the ground 1b of the frame 1.

  In addition, a lower frame 4 for a framework for the purpose of preventing a fall of a worker is horizontally positioned at a position 40 cm or less higher than the scaffolding plate 3 in the opening A formed between each crossing brace 2 and each scaffolding plate 3. is set up.

  The lower frame 4 for frame scaffolding is composed of the lower cross bar main body 5 and a pair of connection fittings 6 and 6 attached to both ends of the lower cross bar main body 5, and the connection fitting 6 is provided at the lower end of the brace 2a. It comprises a slide fitting 7 slidably mounted in the longitudinal direction of the brace 2a, and a link fitting 8 installed between the slide fitting 7 and the end of the lower rail main body 5 (see FIG. 4).

  The slide fitting 7 is opened in the side of the link fitting 8 and is formed in a groove shape surrounding three sides of the brace 2 a except for the side of the link fitting 8. Further, flange portions 7a, 7a extending in parallel to the link metal fitting 8 side are formed, and the flange portions 7a, 7a are rotatable on the inside of flange portions 8a, 8a of the link metal fitting 8 to be described later It is connected detachably.

  The slide fitting 7 slides freely in the longitudinal direction of the brace 2a, but is positioned so as not to be detached from the end of the brace 2a by being positioned by the flat portion 2c.

  The link fitting 8 is formed to have a predetermined length in the longitudinal direction of the lower rail main body 5. Moreover, it is formed in the groove shape opened to the brace 2a side, and is formed in the groove width and the depth which can contain the brace 2a and the lower cross bar main body 5. As shown in FIG.

  Furthermore, flanges 8a and 8a extending in parallel to the direction of the slide fitting 7 are formed at the end on the slide fitting 7 side, and the flanges 8a and 8a are connected to the outside of the flanges 7a and 7a of the slide fitting 7 by connection bolts 9. It is connected rotatably and detachably.

  The lower rail main body 5 is formed of a steel pipe having substantially the same diameter as the bracing 2a, and is formed in an optimal length in accordance with the distance between the end portions of the bracings 2a and 2a opened in an X shape.

  Further, both ends 5a, 5a of the lower rail main body 5 are inserted into the end grooves of the link fitting 8 and are rotatably and detachably connected to both sides in the end grooves by the connecting bolts 10.

  In such a configuration, at the same time as the braces 2a, 2a rotate about the intermediate connection pin 2b to open in an X shape, the slide fittings 7, 7 slide respectively toward the end of the braces 2a, 2a Stop at the position of the part 2c, 2c.

  Further, in parallel with the movement of the slide fittings 7 and 7, the connecting portion between the slide fitting 7 and the link fitting 8 and the connecting portion between the end of the lower crosspiece main body 5 and the link fitting 8 respectively have the connecting bolts 9 and 10 as shafts. The frame scaffold lower bar 4 is bridged in the vicinity of the lower part of the cross brace 2, that is, substantially horizontally extending between the lower ends of the braces 2 a, 2 a. As a result, the opening A between the cross brace 2 and the scaffold plate 3 is narrowed to ensure the safety of the worker.

  As shown in the figure, when the opening of the X-shaped braces 2a, 2a is slightly narrow, the lower frame support scaffold 4 bridged between the lower ends of the braces 2a, 2a is not necessarily horizontal. It is installed in a state of being slightly bent downward at the connecting portion between the slide fitting 7 and the link fitting 8 and the connecting portion between the end of the lower rail main body 5 and the link fitting 8 by its own weight. The lower rail body 5 abuts against the bottom 8b in the end groove of the link fitting 8 to prevent the rotation of the connecting portion between the end of the lower rail body 5 and the link fitting 8 (see FIG. 5). The position of does not fall any further. In addition, even if the worker hangs a foot on the lower rail main body 5, the lower rail main body 5 does not continue to shake in the longitudinal direction due to the impact.

  On the other hand, while the braces 2a and 2a rotate around the connection pin 2b and close in an I-shape, the slide fittings 7 and 7 slide toward the center of the braces 2a and 2a, and the slide fitting 7 and the link fitting 8 The lower rail main body 5 and the link metal fitting 8 of the lower frame 4 for frame scaffolding are rotated by rotating the connecting portion and the connection portion between the end of the lower rail main body 5 and the link metal fitting 8 about the connecting bolts 9 and 10 respectively. It is attached in a substantially rod-like manner on the sides of the braces 2a, 2a (see FIG. 3).

  In this case, in particular, the connection fitting 6 is free to rotate at two points, ie, the connection between the slide fitting 7 and the link fitting 8 and the connection between the end of the lower rail main body 5 and the link fitting 8. Since the crosspiece main body 5 can rotate within a range of about 180 degrees with respect to the brace 2a, the lower frame crosspiece 4 for frame scaffolding is in close contact with the sides of the crosspieces 2a and 2a even if the lower crosspiece main body 5 is short. It can be folded.

  In addition, FIG. 3 illustrates the state before it is completely folded so that the positional relationship between the braces 2a and 2a of the cross brace 2 and the lower frame for frame scaffold 4 can be easily understood.

  6-8 illustrate another embodiment of the present invention, and the connection fitting 6 is provided with a link fitting 11 in place of the link fitting 8 described in the previous embodiment.

  The link fitting 11 is formed in a predetermined length in the longitudinal direction of the lower rail main body 5 and is formed in a groove shape opening to the side of the brace 2a, and the inner width thereof can include the brace 2a and the lower rail main body 5 It is formed in size.

  Furthermore, flanges 11a and 11a extending parallel to the direction of the slide fitting 7 are formed at the end on the slide fitting 7 side, and a flange 11b extending parallel to the direction of the lower cross bar body 5 at the end on the lower rail main body 5 side. , 11b are formed.

  The flanges 11a and 11a are rotatably and detachably connected to the insides of the flanges 7a and 7a of the slide fitting 7 by the connection bolt 9, and the flanges 11b and 11b are both ends of the lower rail main body 5 at both ends. Is connected rotatably and detachably by a connecting bolt 10. The other configuration is substantially the same as the embodiment described in FIGS.

  According to this embodiment, in particular, the connecting portion between the end of the lower rail main body 5 and the link fitting 11 rotates freely by approximately 360 °, so that it is possible to freely cope with the change of the distance between the construction frames 1, 1 it can. That is, it is possible to cope with the case where the distance between the frame 1 is narrowed to a position where the connection between the lower rail main body 5 and the link fitting 11 is at a right angle.

  According to the present invention, the cross brace can be compactly compacted even if it is installed in a cross brace installed between frameworks (1.2 m or less) having a narrow spacing, and it can also be retrofitted to a prefabricated cross brace. .

1 frame
1a Building 2 Cross Brace
2a muscle
2b connecting pin
2c Flat part 3 Scaffolding plate 4 Lower scaffolding for framework 5 Lower rail main body 6 Connection fitting 7 Slide fitting
7a Flange 8 Link bracket
8a Flange 9 Connection bolt
10 connection bolt
11 link bracket
11a Flange part
11b Flange part

Claims (3)

An undercarriage for a framework scaffold placed in the open state in the form of an X-shaped cross and located below the cross brace that consists of a foldable pair of braces, which is laid horizontally around the lower cross of the cross brace. A crosspiece main body and an end coupling fitting attached to each end of the lower crosspiece main body and coupled to the brace, the end fitting being slidably attached in the longitudinal direction of the brace A slide fitting, and a link fitting attached between the slide fitting and the lower rail main body end and connected to the slide metallic bracket and the lower rail main body respectively; and the link metallic fitting and the slide The metal fitting, and the end of the link metal fitting and the lower residual body, respectively, are parallel to each other at the same time when the cross brace opens in an X-shape and the slide metal fitting extends in the longitudinal direction of the cross brace. And at the same time de-coupling portion between the link bracket and the slide bracket, the connecting section between the edge portion of the lower桟本body and the link bracket to the axis, that you have been rotatable in the plane of the cross-brace Lower frame for scaffolding featuring.   The lower frame for scaffolding according to claim 1, wherein the slide fitting is detachably attached to the brace. The end of the lower frame for the framework scaffold which connects the end of the lower part of the framework for the framework which is placed in the open state in the X-shape and in the lower part of the cross brace which consists of the foldable pair of braces A connection fitting, which is attached between a slide fitting slidably attached in the longitudinal direction of the brace, and the slide fitting and an end of the lower crosspiece main body, and the slide fitting and an end of the lower crosspiece main body The link fitting and the slide fitting, and the end of the link fitting and the lower remaining main body respectively simultaneously with the X-shaped opening of the cross brace, and At the same time the slide bracket slides in the longitudinal direction of the cross-bracing, connecting portion between the link bracket and the slide bracket, the shaft connecting section between the edge portion of the lower桟本body and the link bracket, End connecting fitting under crosspieces for framework scaffolding, characterized in that it is rotatable in the plane of the serial cross-bracing.

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