Timbering

Abstract

To provide improved technology related to timbering, particularly related to supporting devices for installing main beams used in erecting timbering.SOLUTION: In a configuration where a main beam (2) is installed on a main frame (8) of a cross-beam device (7) via a supporting device (S2) by connecting the upper ends of pillars (1) constituting a temporary structure (S1), the supporting device (S2) comprises: base means (11) for supporting the main beam; clamping means (12) positioned on the main beam; and connecting means (13) for fixing the main beam by connecting the clamping means to the base means.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to shoring such as formwork for forming slabs and beams of a building frame, and in particular to an improved support device for installing joists that erect the shoring. [Background technology]

[0002] For example, when pouring concrete to form the framework of a building such as a slab, as shown in Figures 1 and 2, columns 1 are arranged in a row at intervals in the girder direction X and the beam direction Y and connected to each other to construct a temporary structure S1 up to a height where workers can work. Joists 2 are then placed on top of this via support devices S2, and pipe supports 3 equipped with expansion and contraction adjustment means are erected on top of the joists 2 to construct a support structure S3.

[0003] When constructing the temporary structure S1, adjacent columns 1, 1 are connected in the girder direction X and the beam direction Y by a girder-facing cross member 4 and a beam-facing cross member 5, respectively, and are further connected as necessary by a leading handrail or a scaffolding board 6 with a fabric frame as shown in the figure.

[0004] 1 and 2 show the prior art proposed by the present applicants in Patent Documents 1 and 2, in which columns 1 are arranged in a row at equal intervals Lk in the girder direction X, and the upper ends of adjacent columns 1 are connected by a cross-bracing device 7. The cross-bracing device 7 forms upper and lower chords by arranging a main frame 8 made of metal pipes and a lower frame in parallel above and below, and by providing vertical members and diagonal members between the two frames, a framework for a parallel chord truss structure is constructed. Note that each metal pipe has a circular cross section.

[0005] As a result, the temporary structure S1 forms a girder structure Sv that is a rigid structure located at the upper end and extends in the girder direction X. The temporary structure S1 is configured such that the columns 1 are lined up at equal intervals Lk in the girder direction X without distinguishing between the deck slab portion (below the slab forming member F1) and the beam portion (below the beam forming member F2), and a large number of cross-frame devices 7 that connect the upper ends of adjacent columns 1 form the girder structure Sv that extends in the girder direction through the deck slab portion and the beam portion.

[0006] A mounting means 9 is provided on the upper part of the cross-beam device 7, which allows the beams 2 to be installed at any position along almost the entire length extending between a pair of adjacent pillars 1, 1, and the mounting means 9 forms a support device S2 for installing the beams 2 on top of the girder structure Sv.

[0007] Therefore, by selecting any position on the mounting means 9, a predetermined installation position is determined, and after the beams 2 are installed at that installation position, the support structure S3 is constructed by erecting pipe supports 3 on the beams 2, thereby supporting the slab forming members F1 and beam forming members F2 from below.

[0008] In this case, the joists 2 are made of wooden square timbers, and are fixed by driving wood screws, nails, etc. into them while they are placed on fixing members made of wooden material provided on the mounting means 9. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2023-170048 [Patent Document 2] Japanese Patent Application Publication No. 2023-170049 Summary of the Invention [Problem to be solved by the invention]

[0010] Incidentally, with the support device S2 of the prior art shown in Patent Documents 1 and 2, for example, when installing the joists 2 on the mounting means 9, it is necessary to drive nails or the like into many locations on the many joists 2, and conversely, when removing the joists 2 for dismantling, it is necessary to pull out many nails or the like, which makes the work complicated. Moreover, repeated driving and pulling out of nails or the like causes problems such as deterioration of the joists 2. Furthermore, there are various issues that need to be improved regarding workability and other aspects.

[0011] Therefore, the present invention provides a support that solves the problems inherent in the support device S2 described above. [Means for solving the problem]

[0012] Therefore, the present invention is configured as a means in which, on the top of a temporary structure (S1) constructed by connecting columns arranged at intervals in the girder direction (X) and the beam direction (Y) with girder-facing cross members and beam-facing cross members, joists are arranged at predetermined intervals in a predetermined direction and supports are erected on the joists, and the temporary structure (S1) is configured so that the upper ends of adjacent columns are connected to each other by cross-linking devices, and the joists are installed via support devices (S2) on a main frame extending in the longitudinal direction (F) of the cross-linking devices. The support device (S2) comprises a base means on which the joists are placed, a pressing means placed on the joists, and a connecting means for fixing the joists by connecting the pressing means to the base means, and the base means is configured to be mountable at any position in the longitudinal direction (F) relative to the main frame of the cross-beam device, and the connecting means is configured to be connectable at any position in the longitudinal direction (F) relative to the base means and is configured to press the pressing means against the upper surface of the joists to fix them.

[0013] In a preferred embodiment, the base means is composed of a mounting bracket that is fitted over the main frame so as to be slidable in the longitudinal direction, and a locking bracket that detachably locks the mounting bracket to the underside of the main frame.

[0014] Preferably, the connecting means is composed of a bolt fitting having a head at the lower end of its upwardly facing screw shank, and a nut fitting screwed onto the screw shank, and is configured so that the holding means is moved downward by screwing the nut fitting into a state in which the screw shank is inserted upward from below the holding means, and the base means has a support groove extending in the longitudinal direction that supports the bolt fitting, and the support groove forms a groove portion into which the head of the bolt fitting is slidably fitted, and a slit portion that allows the screw shank of the bolt fitting to be inserted and removed upward from the groove portion.

[0015] The connecting means is composed of a bolt fitting with an upwardly facing screw shank and a nut fitting screwed onto the screw shank, and two bolt fittings are arranged on both sides of the beam placed on the base means, and the holding means forms an insertion passage through which the screw shank is inserted upward from below, and is configured to be moved downward by screwing the nut fitting onto the screw shank inserted from the insertion passage, and the insertion passage of the holding means is configured to allow the screw shank to be inserted into a plurality of selectable positions in the width direction of the beam. [Effects of the Invention]

[0016] According to the present invention, there is no need to perform the work of driving nails or the like into and pulling out nails from a large number of beams 2 at multiple locations as in the prior art, and there is an advantage in that workability is extremely good. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a front view showing a support structure according to the prior art. [Figure 2] Regarding the prior art, (A) is a perspective view showing a girder structure formed on top of a temporary construction, and (B) is a perspective view showing a support device provided on the girder structure. [Figure 3] 1 is a front view showing an embodiment of a support according to the present invention. [Figure 4]Regarding an embodiment of a support device, (A) is a perspective view showing a girder structure formed on top of a temporary construction, and (B) is a perspective view showing a support device provided on top of the girder structure. [Figure 5] 1A is a perspective view showing a base means, a pressing means, and a connecting means in an exploded state, and FIG. 1B is a cross-sectional view of a mounting bracket that constitutes the base means, according to an embodiment of the support device. [Figure 6] FIG. 10 is a perspective view showing an embodiment of a support device in which joists are installed on the main frame of a cross-bridge device. [Figure 7] Regarding the base means, (A), (B), and (C) are explanatory diagrams showing the state before the locking fittings are locked to the underside of the main frame, and (D), (E), and (F) are explanatory diagrams showing the state after the locking fittings have been locked to the underside of the main frame. [Figure 8] FIG. 2 is a perspective view showing a state in which a base means is mounted on a main body frame of a cross-bridge device that constitutes a girder structure. [Figure 9] FIG. 10 is a perspective view showing a state in which joists are placed on the base means. [Figure 10] FIG. 10 is a perspective view showing a state in which a joist placed on a base means is fixed by a pressing means and a connecting means. [Figure 11] This is a perspective view showing the state in which support is formed by erecting pipe supports on joists. [Figure 12] FIG. 10 is a perspective view showing an example in which two joists are installed and fixed side by side using a support device. [Figure 13] 10A is a perspective view showing another embodiment of the insertion passage of the pressing means constituting the support device, and FIG. 10B is a perspective view showing yet another embodiment. [Figure 14] 10 shows another embodiment of the locking fitting of the base means constituting the support device, where (A) and (B) are explanatory diagrams showing the state before the locking fitting is locked to the underside of the main frame, and (C) and (D) are explanatory diagrams showing the state after the locking fitting has been locked to the underside of the main frame. DETAILED DESCRIPTION OF THE INVENTION

[0018] A preferred embodiment of the present invention will be described in detail below with reference to Figures 3 to 12. Note that technical components that are the same as or similar to those in the prior art described with reference to Figures 1 and 2 are designated by the same reference numerals as those shown in Figures 1 and 2.

[0019] As shown in Figures 3 and 4, by interconnecting supports 1 that are arranged in a row at intervals in the girder direction X and the beam direction Y, a temporary structure S1 is constructed up to a height where workers can work, and joists 2 are placed on top of it via support devices S2, and pipe supports 3 equipped with expansion and contraction adjustment means are erected on the joists 2 to construct a support structure S3. This is the same as the prior art described above.

[0020] When constructing the temporary structure S1, adjacent columns 1, 1 are connected in the girder direction X and the beam direction Y by girder-facing cross members 4 and beam-facing cross members 5, respectively, and are further connected, as necessary, by scaffolding boards 6 with leading handrails or fabric frames as shown. As with the prior art, the columns 1 are lined up at equal intervals Lk in the girder direction X, and the upper ends of adjacent columns 1 are connected by cross members 7. The cross members 7 are formed by a framework of a parallel chord truss structure, and are connected in the girder direction X and are arranged side by side in the beam direction Y. As a result, the temporary structure S1 forms a girder structure Sv, which is a rigid structure located at the upper end and extends in the girder direction X.

[0021] In other words, the temporary structure S1 is not one in which the columns 1 are allocated according to the deck portion (below the slab forming member F1) and the beam portion (below the beam forming member F2), but rather is configured such that the columns 1 are lined up at equal intervals Lk in the girder direction X without distinguishing between the deck portion and the beam portion, and a large number of cross-frame devices 7 connecting the upper ends of adjacent columns 1 form a girder structure Sv that extends in the girder direction through the deck portion and the beam portion.

[0022] A support device S2 is provided on top of the girder structure Sv for installing beams 2. As will be described below, the support device S2 is provided on top of a main frame 8 of a cross-bridge device 7 that connects the upper ends of adjacent pillars 1, 1.

[0023] In this case, the support device S2 allows for free selection of the installation position when installing the joist 2, and after installing the joist 2 at an arbitrarily selected position, a support structure S3 is constructed by erecting a pipe support 3 on top of it, and is configured to support the slab forming member F1 and the beam forming member F2 from below.

[0024] Incidentally, since the support device S2 of the present invention is configured to install the joists 2 on top of the temporary structure S1, the embodiment does not necessarily have to be one in which the girder structure Sv is formed by the bridging device 7 having the framework of a parallel chord truss structure as described above. In other words, it can also be applied to a bridging device 7 having a simple configuration without a framework, and in short, it is sufficient that it is installed on a main frame 8 extending in the longitudinal direction.

[0025] (Configuration of support device) 4 to 11 show one embodiment of the present invention for the support device S2 for installing the joists 2. In this case, the joists 2 may be wooden beams as in the prior art, but preferably are metal pipes 10 with a rectangular cross section.

[0026] By using metal for the joists 2, there is no problem of deterioration as with wood. Furthermore, according to the present invention, whether the joists 2 are made of metal or wood, the work of driving and pulling out nails or the like at multiple locations on multiple joists 2, as in the prior art, is not required, and workability is extremely good.

[0027] The support device S2 is composed of a base means 11 on which the beam material 2 is placed, a pressing means 12 placed on the beam material 2, and a connecting means 13 that fixes the beam material 2 by connecting the pressing means 12 to the base means 11.

[0028] (Base means) 5, the base means 11 is composed of a mounting bracket 14 of a predetermined length L1 formed from an extruded metal material. The mounting bracket 14 has a downward embracing groove 15 that fits over and embraces the main body frame 8 of the bridging device 7, and the embracing groove 15 forms a groove bottom wall 15a and a pair of groove side walls 15b, 15c. In the illustrated embodiment, since the main body frame 8 is a round pipe, the groove bottom wall 15a forms an arcuate surface that follows the outer circumferential surface of the pipe.

[0029] An upward support groove 16 is formed in the upper part of the groove bottom wall 15a, and this support groove 16 has a groove portion 16a of a predetermined width and a narrow slit portion 16b formed by narrowing the opening of the groove portion 16a, and the upper surface of the mounting bracket 14 including the slit portion 16b provides a support surface 17 on which the joist 2 is placed.

[0030] The mounting bracket 14 is capable of sliding freely in the longitudinal direction F of the main frame 8 while holding the main frame 8 of the cross-bridge device 7 with the holding groove 15, and is provided with a locking bracket 18 that can be freely engaged and disengaged with the underside of the main frame 8 at any position in the longitudinal direction F.

[0031] In the illustrated embodiment, a pair of locking fittings 18 are arranged facing both longitudinal ends of the mount fitting 14, with one locking fitting 18 fixed to the outer surface of one groove side wall 15b and the other locking fitting 18 fixed to the outer surface of the other groove side wall 15c. However, the arrangement is not limited to this.

[0032] (Lock fittings) 7, the locking fitting 18 is composed of a bearing fitting 19 with a U-shaped cross section that is fixed to the outer surface of the groove side wall 15b (15c) by welding or the like, a pin 20 that passes through the bearing fitting 19 in the vertical direction, and a spring 21 made of a coil spring that resiliently urges the pin 20 upward. In this case, the pin 20 can move downward against the spring 21 and can also rotate in the axial direction.

[0033] The lower end of the pin 20 is provided with a locking portion 22 that is bent at an approximately right angle and extends in the bending direction, and the bearing fitting 19 is provided with an extension portion 23 that extends downward beyond the lower end of the groove side wall 15b (15c), and the extension portion 23 is provided with a fitting groove 24 into which the locking portion 22 can be freely fitted.

[0034] Regarding the operation of the locking fitting 18, Figures 7(A), (B), and (C) show the state before the locking fitting 18 is locked to the underside of the main frame 8 (state before operation). As shown in the figures, the pin 20 is moved upward by the spring 21, and the locking portion 22 is released from the fitting groove 24 and is in a position where it is aligned with the extension portion 23. For this reason, as shown in Figure 7(C), the main frame 8 can be inserted into the holding groove 15 of the mounting fitting 14, and conversely, it can also be removed.

[0035] 7(D), (E), and (F) show the state in which the locking fitting 18 is locked to the underside of the main frame 8 (activated state). From the pre-activation state described above, the pin 20 is pressed down against the spring and then rotated approximately 90 degrees to fit the locking portion 22 into the fitting groove 24, causing the pin 20 to stop in the downward movement position. At this time, as shown in FIG. 7(F), the tip of the locking portion 22 approaches or abuts against the underside of the main frame 8, thereby locking it. It is preferable to form a tapered surface 22a at the tip of the locking portion 22, and the tapered surface 22a is suitably aligned with the circumferential surface of the lower side of the main frame 8.

[0036] To return from the activated state to the pre-activated state, the pin 20 is rotated to release the locking portion 22 from the fitting groove 24, and the spring 21 moves the pin 20 upward to return it to its original state. In the illustrated example, a knob portion 20a is provided at the upper end of the pin 20 by fastening a hexagonal nut.

[0037] (holding means and connecting means) 5, the pressing means 12 is made up of a metal plate 25 of a predetermined length L2 extending in the longitudinal direction of the mounting bracket 14. In the illustrated embodiment, downwardly sloping side edge portions 25b are provided along both sides of a strip-shaped flat plate portion 25a formed in the center.

[0038] The connecting means 13 is composed of two bolt fittings 26, 26 and a nut fitting 27. The bolt fitting 26 has a large-diameter head 26b at the lower end of an upward-facing screw shank 26a, and is installed upright on the mount fitting 14 by fitting the head 26b slidably into the groove 16a of the support groove 16 of the mount fitting 14 and inserting the screw shank 26a upward through the slit 16b.

[0039] Therefore, the metal plate 25 constituting the pressing means 12 is configured so that the metal plate 25 moves downward by inserting the screw shank 26a upward from below through an insertion passage 28 provided in the flat plate portion 25a and then screwing the nut fitting 26 onto the insertion end of the screw shank 26a. In the illustrated example, the nut fitting 26 is configured as a wing nut so that a screwing tool is not required.

[0040] In the illustrated embodiment, the insertion passage 28 is composed of a pair of insertion holes 28a, 28a arranged at a predetermined distance D1 in the longitudinal direction F, and a pair of insertion holes 28b, 28b arranged at a wider distance D2 that is approximately twice the distance D1.

[0041] (Method of installing joists using support devices) FIG. 6 shows a state in which the support device S2 is provided on the main frame 8 of the cross-beam device 7 and the joists 2 are installed.

[0042] In order, first, the pedestal fitting 14 that constitutes the base means 11 is provided on the main body frame 8. Since the pedestal fitting 14 is slidable in the longitudinal direction F in a state of being crowned on the main body frame 8 via the holding groove 15, a desired position can be selected by sliding (possibility of selecting the installation position of the base means). Then, by locking the locking fitting 18 to the lower surface of the main body frame 8 at the selected position, it is fixed in a state where it cannot fall off.

[0043] Next, the large pulling member 2 is placed on the placement surface 17 of the pedestal fitting 14. At this time, the large pulling member 2 is placed in a posture perpendicular to the longitudinal direction F of the pedestal fitting 14 and the main body frame 8. As shown in the figure, the width W of the large pulling member 2 is configured such that W < L2 < L1 with respect to the length L1 of the base means 11 and the length L2 of the pressing means 12 described above. Thereby, the large pulling member 2 can select a desired position by moving in the longitudinal direction F on the pedestal fitting 14 (possibility of selecting the installation position of the large pulling member).

[0044] Therefore, in a state of being along both side surfaces of the large pulling member 2, two bolt fittings 26, 26 that constitute the connecting means 13 are erected on the pedestal fitting 14. By inserting and sliding the head 26b of the bolt fitting 26 from both ends of the pedestal fitting 14 into the groove portion 16a of the support groove 16, the screw shaft portion 26a is brought along the side surface of the large pulling member 2. That is, the erected positions and intervals of the two bolt fittings 26, 26 can be arbitrarily selected along the support groove 16 (possibility of selecting the attachment position of the connecting means).

[0045] In this state, the metal plate 25 that constitutes the pressing means 12 is arranged above the large pulling member 2, the screw shaft portions 26a, 26a are inserted through the pair of insertion holes 28a, 28a having the above-mentioned interval D1, the nut fitting 27 is screwed onto the insertion portion, and the metal plate 25 is fastened to the upper surface of the large pulling member 2, then the large pulling member 2 is fixed in a state of being pressed by the metal plate 25 via the connecting means 13 on the pedestal fitting 14.

[0046] Incidentally, in the case of the illustrated embodiment, as shown in FIG. 12, it is configured to be installed in a state where the two large tension members 2 and 2 are placed on the pedestal fitting 14. In this case, the length L1 of the pedestal fitting 14 and the length L2 of the metal plate 25 are configured such that 2W < L2 < L1 with respect to the total width 2W of the two large tension members 2 and 2, and the interval D2 between the insertion holes 28b and 28b provided in the metal plate 25 is configured such that 2W < D2 < L2.

[0047] That is, the metal plate 25 forms an insertion passage 28 that enables the screw shaft portions 26a of the bolt fittings 26 and 26 to be inserted into a plurality of selectable positions in the width direction of the large tension member 2 by the insertion holes 28a and 28a arranged at the interval D1 and the insertion holes 28b and 28b arranged at the interval D2. Therefore, due to the insertion passage 28 configured as such, the metal plate 25 can insert and attach the screw shaft portion 26a in either case where the two bolt fittings 26 and 26 are arranged along both side surfaces of one large tension member 2 or where they are arranged along both side surfaces of the two large tension members 2 and 2 (arbitrariness of the mounting position of the pressing means).

[0048] (Construction example) FIGS. 8 to 11 show a construction example in which, based on the above embodiment, a support device S2 is provided on a girder structure Sv provided on the upper part of a temporary structure S1, a large tension member 2 is installed, and a pipe support 3 is erected thereon to construct a shoring work S3.

[0049] As shown in FIG. 8, between the horizontally installed devices 7 arranged in parallel in the beam direction Y, a scaffold board 29 is installed on the beam-direction horizontally installed members 5 and 5 adjacent to each other in the girder direction X to form a work floor. The scaffold board 29 can use a fabric-attached scaffold board equipped with a known hook.

[0050] Therefore, a pedestal fitting 14 constituting the base means 11 is mounted on the main body frame 8 of the horizontally installed device 7. At this time, due to the above-mentioned "selectability of the installation position of the base means", the pedestal fitting 14 can be mounted at a desired selected position with respect to the longitudinal direction F of the main body frame 8.

[0051] 9, the joists 2 are placed on the mounting brackets 14. As described above, the mounting brackets 14 form the mounting surface 17 over the predetermined length L1, and therefore, due to the "selectability of the mounting position of the joists" described above, the joists can be placed in a selected, desired position in the longitudinal direction F of the main frame 8. In particular, even if adjacent mounting brackets 14, 14 in the beam direction Y are not aligned in the beam direction Y and there is some misalignment, the joists 2 can still be placed on these mounting brackets 14, and this allows the joists 2 to be arranged in a row at a desired pitch P in the girder direction X.

[0052] In this state, as shown in Figure 10, the installation work of the beams 2 is completed by attaching the holding means 12 (metal plate 25) from above the beams 2 to each mounting bracket 14 via the connecting means 13 (bolt fittings 26 and nut fittings 27).

[0053] Thereafter, as shown in FIG. 11, pipe supports 3 are erected on the joists 2 to construct a support structure S3.

[0054] (Another embodiment of the insertion passage) Figure 13(A) shows another embodiment of the insertion passage 28 formed in the metal plate 25 of the holding means 12, where the insertion passage 28 is formed by a pair of elongated holes 28c, 28c. The distance D1 between the opposing ends of the pair of elongated holes 28c, 28c and the distance D2 between the opposite ends are configured to be approximately equal to the distances D1 and D2 in the embodiment shown in Figure 5 above. This allows for the above-mentioned "optional mounting position of the holding means" to accommodate the positions of the bolt fittings 26, 26 when installing one beam 2 and when installing two beams 2, 2 side by side.

[0055] 13(B) shows yet another embodiment of the insertion passage 28, which is made up of slits 28d, 28d that extend from inner ends 30a arranged at intervals D1 to both end edges of the metal plate 25 and have openings 30b formed in said edges. This not only allows for the above-mentioned "optional mounting position of the holding means," but also has the advantage that the bolt fitting 26 that moves along the support groove 16 of the mount fitting 14 can be guided from the openings 30b into the slits 28d.

[0056] (Another embodiment of the locking fitting) Figure 14 shows another embodiment of the locking fitting 18 of the mounting bracket 14 that constitutes the base means 11. In this case, the pin 20 is provided with a stop pin 20b that is located inside the bearing bracket 19 and is perpendicular to the pin 20, and a fitting groove 24a is provided on the side of the bearing bracket 19. The other configurations are substantially the same as the embodiment shown in Figure 7 above.

[0057] Regarding the operation of the locking fitting 18, Figures 14(A) and 14(B) show the state before activation, in which the pin 20 is moved upward by the spring 21. At this time, the stop pin 20b is disengaged from the fitting groove 24a. In contrast, Figures 14(C) and 14(D) show the state during activation in which the locking fitting 18 locks the locking portion 22 to the underside of the main frame 8. From the above-described state before activation, when the pin 20 is pressed down against the spring and then rotated approximately 90 degrees, the stop pin 20b is fitted into the fitting groove 24a, stopping the pin 20 in the downward position. At this time, the tip of the locking portion 22 approaches or abuts against the underside of the main frame 8, thereby locking it. The knob portion 20a provided at the upper end of the pin 20 is composed of a pin on a lever inserted into the pin 20. [Explanation of symbols]

[0058] S1 Temporary Structure S2 support device S3 shoring Sv digit structure F1 Slab forming member F2 beam forming member 1 post 2. Joists 3 Pipe Support 4 Girder-oriented cross member 5 Beam-oriented cross members 6 Scaffolding planks 7 Horizontal rack device 8 Main frame 9. Mounting means (prior art) 10 Metal pipes (joists) 11 Base Means 12 Holding means 13 Connection means 14 Mounting bracket 15 Holding groove 15a Groove bottom wall 15b, 15c Groove side wall 16 Support groove 16a Groove 16b Slit section 17 Placement surface 18 Locking hardware 19 Bearing fittings 20-pin 20a Knob 20b Retaining pin 21 Spring 22 Locking portion 22a Tapered surface 23 Extension 24, 24a fitting groove 25 metal plate 25a Flat plate part 25b Side edge 26 Bolt fittings 26a Screw shaft 26b Head 27 Nut fittings 28 Passage 28a, 28b Insertion holes 28c long hole 28d slit 29 Scaffolding Planks 30a Back end 30b opening

Claims

1. In a configuration in which joists (2) are arranged at predetermined intervals in a predetermined direction at the top of a temporary structure (S1) constructed by connecting columns (1) arranged at intervals in a girder direction (X) and a beam direction (Y) with horizontal members for the girder and horizontal members for the beam, and supports (S3) are erected on the joists, The temporary structure (S1) is configured such that the upper ends of adjacent columns (1) are connected to each other by a bridging device (7), and the joists (2) are installed on a main frame (8) extending in the longitudinal direction (F) of the bridging device (7) via a support device (S2), The support device (S2) comprises a base means (11) on which the joists are placed, a pressing means (12) placed on the joists, and a connecting means (13) for connecting the pressing means to the base means to fix the joists, The base means (11) is configured to be mountable at any position in the longitudinal direction (F) on the main body frame (8) of the bridging device, The connecting means (13) is configured to be connectable to the base means (11) at any position in the longitudinal direction (F), and is configured to press and fix the holding means (12) against the upper surface of the joist.

2. The support structure described in claim 1, characterized in that the base means (11) is composed of a mounting bracket (14) that is fitted over the main frame (8) so as to be freely slidable in the longitudinal direction, and a locking bracket (18) that locks the mounting bracket to the underside of the main frame in a freely detachable manner.

3. The connecting means (13) is composed of a bolt (26) having a head (26b) at the lower end of an upwardly facing screw shaft (26a), and a nut (27) screwed onto the screw shaft, and is configured so that the screw shaft (26a) is inserted upward from below the holding means (12) and the nut (27) is screwed onto the bolt (26), thereby moving the holding means (12) downward. The base means (11) has a support groove (16) extending in the longitudinal direction to support the bolt fitting (26), The support structure described in claim 1, characterized in that the support groove (16) is formed by forming a groove portion (16a) into which the head (26b) of the bolt fitting (26) is slidably fitted, and a slit portion (16b) that allows the screw shank portion (26a) of the bolt fitting to be inserted and removed upward from the groove portion.

4. The connecting means (13) is composed of a bolt fitting (26) with an upwardly facing screw shaft portion (26a) and a nut fitting (27) screwed onto the screw shaft portion, and two bolt fittings (26) (26) are arranged on both sides of the beam (2) placed on the base means (11). The holding means (12) is configured to form an insertion passage (28) through which the screw shaft portion (26a) is inserted upward from below, and to be moved downward by screwing the nut fitting (27) onto the screw shaft portion (26a) inserted through the insertion passage. The support structure described in claim 1, 2 or 3, characterized in that the insertion passage (28) of the holding means is configured so that the screw shaft portion (28a) can be inserted at multiple selectable positions in the width direction of the joist (2).

Images