Telescopic bracket in scaffold construction body

Abstract

To provide a telescopic bracket in a scaffold construction body which is provided with a post support device capable of erecting and supporting an end part post in a prescribed attitude against an end face flange provided at an inner pipe making up a telescopic pipe.SOLUTION: A post support apparatus (30) comprises: fixed support means (32) defining a reference plane (31) in a state of being fixed to an end face flange (19) via bolt means (41); and insertion means (33) fastened to the fixed support means. The insertion means comprises: an insertion pipe part (34) inserted into a lower end part of an end part post; a support pipe part (35) contactedly supporting the lower end face of the end part post; and a lock mechanism (37) preventing the insertion pipe part and the end part post from falling out. The fixed support means (32), the insertion means (33) and the lock mechanism (37) are mutually fastened in an arrangement relation where binding means (3) of the end part post (2E) inserted by the insertion means locates binding parts (3a) on an X axis and a Y axis based on the reference plane (31).SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to an expansion bracket for a scaffolding structure constructed at a construction site or the like. [Background technology]

[0002] The telescopic bracket is used for various purposes, such as a bracket for a splay scaffold and a bracket for supporting a scaffold board. For example, when used as a bracket for a splay scaffold, a scaffold board is mounted on the telescopic tube that protrudes from the support in a cantilever shape and is extended to a predetermined length to expand the working area. At that time, a single tube is fixed to the tip of the inner tube via a clamp metal fitting, and for example, a falling object protection net or the like is attached for safety. On the other hand, when used as a scaffold support bracket, with the telescopic bracket attached to the support, another support (end support) is erected via a clamp metal fitting attached to the tip of the inner tube, and a scaffold board is mounted on the telescopic tube that has been extended to a predetermined length.

[0003] Figures 1 to 3 show a conventional expandable bracket. A temporary scaffolding structure 1 is constructed by lining up supports 2 in the X and Y directions that are perpendicular to each other on a plane. The supports 2 are provided with fastening means 3 made of flanges or the like at a predetermined interval above and below, and adjacent supports 2, 2 in the X direction are connected by cross members 4. Scaffolding boards 5 are erected between adjacent cross members 4, 4 in the Y direction.

[0004] The telescopic bracket 10 is made up of an outer tube 11 that is cantilevered on the support 2 (or a vertical member replacing the support) of the scaffolding structure 1 and protrudes horizontally in the X direction, and an inner tube 12 that is slidably inserted into the outer tube, forming a telescopic tube that can be telescopic in the X direction. The outer tube 11 and the inner tube 12 are provided with a guide means 13 that guides the axial sliding of the inner tube 12 while preventing circumferential rotation, and a lock means 14 that fixes the inner tube 12 so that it cannot slide. The guide means 13 is, for example, made up of a guide groove 13a extending in the axial direction of the inner tube 12 and a bolt 13b that engages with the guide groove from the outer tube 11. The lock means 14 is, for example, made up of a fastening bolt 14a that is screwed in from the outer tube 11 and presses and fixes the guide groove.

[0005] To enable cantilever support on the support column 2, a support structure 15 is formed by a brace 15a extending diagonally downward from the axial midpoint of the outer pipe 11 toward the support column 2, and a reinforcing member 15b in a substantially vertical direction connecting the brace 15a and the outer pipe 11. The lower end of the support structure 15 is connected to the support column 2 via a connecting member 16, and the upper part of the support structure 15 and / or the tail end of the outer pipe 11 is attached and fixed to the support column 2 via a fixing device 17. In the illustrated example, the fixing device 17 is composed of a locking metal fitting 17a that locks the tail end of the outer pipe 11 to the fastening means 3 (flange) of the support column 2, and a clamp metal fitting 17b that fastens the upper part of the support structure 15 to the support column 2.

[0006] A sleeve 18 is fixed to the tip of the inner pipe 12 of the telescopic bracket 10 by welding or the like, and when the inner pipe 12 is contracted, the end faces of the sleeve 18 and the outer pipe 11 abut against each other. An end flange 19 is fixed to the sleeve 18, and a nut 20 is fixed to the inside of the end flange 19 from the inside of the sleeve 18 by welding or the like, and an introduction hole 21 communicating with the nut 20 is opened in the end flange 19.

[0007] This makes it possible to attach the clamp fitting 22 to the tip end of the inner tube 12 as necessary, as described above. The clamp fitting 22 has a base end of a rotating fitting 24 pivotally connected to one end of a fixed fitting 23 by a pivot 25, and a rotatable fastening bolt 27 is provided on the other end of the fixed fitting 23 via a pivot 26.

[0008] The clamp fitting 22 has an attachment bolt 28 implanted into the back surface of the fixing fitting 23, and is attached and fixed to the end flange 19 of the inner pipe 12 by screwing the attachment bolt 28 into the nut 20, thereby fastening and fixing a specified pipe member 29 such as a single pipe or a pillar member. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2012-225040 A Summary of the Invention [Problem to be solved by the invention]

[0010] FIG. 4 shows an example in which the expandable bracket 10 is used as a scaffolding support bracket as described above, with an end support 2E fixed to the tip of the inner tube 12.

[0011] The scaffolding structure 1 is constructed by extending from bottom to top by connecting the pillars 2 vertically with connecting joints 6, and connecting adjacent pillars 2, 2 in the X direction with cross members 4 via fastening means 3. Although not shown in the figure, adjacent pillars 2, 2 are also connected in the Y direction with connecting members via fastening means 3. In this case, the fastening means 3 (flanges) has fastening parts 3a (flange holes) at four locations located on each axis with respect to the X axis and Y axis extending from the center of the pillar 2 in the X direction and Y direction, as shown in Fig. 5(D), which enables connection between adjacent pillars 2, 2 in the X direction and Y direction.

[0012] 5(A), (B), (C), and (D) show an example of the connecting joint 6. The connecting joint 6 is attached and fixed in advance to the upper end of the lower support 2a, and is configured to be erected by coaxially inserting and engaging the upper support 2b.

[0013] For this reason, the connecting joint 6 is composed of a tubular body consisting of a lower insertion tube 6a inserted into the lower support 2a, an upper insertion tube 6b inserted into the upper support 2b, and a large diameter support tube portion 6c arranged between the lower support 1a and the upper support 1b, and is provided with a locking pin mechanism 7 that prevents the lower insertion tube 6a from falling out when inserted into the lower support 2a, and a locking mechanism 8 that prevents the upper insertion tube 6b from falling out when inserted into the upper support 2b.

[0014] The locking pin mechanism 7 is inserted into the lower insertion tube 4 with both legs of the gate-shaped leaf spring 7a elastically deformed in the closing direction, and the locking pins 7b, 7b provided on both legs protrude outward from guide holes 6d opened in the lower insertion tube 6a. As a result, as shown in Fig. 5(B), when the lower insertion tube 6a is inserted into the lower support 2a, the lower end of the lower support 2a abuts against the support tube portion 6c, and the locking pins 7b, 7b are inserted and locked into the locking holes 7c, 7c of the lower support 2a.

[0015] The locking mechanism 8 is composed of a rod having a sliding shaft portion 8a inserted diametrically through the ring body 6c and having a locking portion 8c folded back via an intermediate portion 8b bent upward from the sliding shaft portion 8a, and a coil spring 8d inserted onto the sliding shaft portion 8a resiliently biases the locking portion 8c toward a receiving hole 8e of the upper insertion tube 6b, causing it to be inserted into the receiving hole 8e.

[0016] Therefore, when inserting the upper support 2b into the connecting joint 6 attached to the lower support 2a, the worker pinches the middle part 8b of the rod with his fingertips to pull out the locking part 8c from the receiving hole 8e, and in this state, inserts the upper support 2b into the upper insertion tube 6b while moving it to a position where it abuts against the support tube part 6c. After confirming that the locking hole 8f is aligned with the receiving hole 8e, as shown in Figure 5 (C), the locking part 8c is inserted through the locking hole 8f and the receiving hole 8e, and the upper support 2b is locked in a state where it will not come out.

[0017] The arrangement of the fastening means 3 (flanges) provided on the pillars 2 (lower pillar 2a and upper pillar 2b) and the rods constituting the locking mechanism 8 is set so that the sliding direction M of the sliding shaft portion 8a does not interfere with the X and Y directions and is located midway between the X and Y axes, as shown in Fig. 5(D). When the locking hole 8f of the upper pillar 2b is locked and fixed by inserting the locking portion 8c of the locking mechanism 8, the fastening means 3 (flanges) of the upper pillar 2b is set to a predetermined position, that is, the fastening portion 3a is set to a position where it is located above the X and Y axes.

[0018] However, in such a configuration, when the support pole 2 is supported on the tip of the inner tube 12 of the expansion bracket 10 via the clamp metal fitting 22, the following problem occurs as shown in FIG. 5(E).

[0019] That is, since the clamp fitting 22 is configured to fasten the support 2 from the outer periphery using the fixed fitting 23 and the rotating fitting 24, it is difficult to determine the fixed position of the support 2 in the vertical direction H when fastening, and the positioning work required for this is cumbersome. Moreover, there is a problem that after fastening, it cannot exert a strong supporting force against a vertical load.

[0020] Similarly, since there is no positioning means for the support 2 in the axial direction R1, the work of positioning the support 2 so that the fastening portion 3a (wedge hole) of the fastening means 3 (flange) is aligned in the X and Y directions during fastening is complicated.

[0021] Furthermore, as mentioned above, the clamp fitting 22 is fixed to the nut 20 of the inner tube 12 of the telescopic bracket 10 simply by screwing the mounting bolt 28 into it. Therefore, if an unbalanced load is applied, there is a risk that the clamp fitting 2 will rotate in the axial direction R2 of the bolt, causing the pillar 2 to no longer align with the vertical line.

[0022] In view of the above, an object of the present invention is to provide a column support device that is configured so that an end column can be suitably attached and supported by an expansion bracket. [Means for solving the problem]

[0023] The present invention provides a telescopic bracket for a scaffolding structure constructed by arranging pillars at intervals in the X and Y directions perpendicular to each other on a plane, the pillars being provided with fastening means having fastening parts arranged on the X and Y axes extending from the center in the X and Y directions, the telescopic bracket being provided with an outer tube extending in the X direction from the tail end fixed to the scaffolding structure, and an inner tube protruding from the tip of the outer tube so as to be freely slidable and freely fixed, and being configured so that a bolt means inserted from the outside is screwed into an inner nut against an end flange fixed to the tip of the inner tube, and a support positioned at the tip of the inner tube to erect an end support A support device is provided, the column support device being composed of fixed support means which is attached and fixed to the end face flange via the bolt means and which defines a reference plane when attached and fixed, and an insertion means fixed to the fixed support means, the insertion means comprising an insertion tube portion which is inserted into the lower end of the end column, a support tube portion which abuts and supports the lower end face of the end column, and a locking mechanism which prevents the insertion tube portion and the end column from coming off, the fixed support means, the insertion means and the locking mechanism being fixed to each other in a positional relationship such that the fastening means of the end column inserted into the insertion means has the fastening portions positioned on the X-axis and Y-axis, based on the reference plane.

[0024] Preferably, a positioning means is provided for the bolt means in the axial direction relative to the reference surfaces of the end flange and the fixed support means, and the insertion means is arranged to insert and support the end support along a vertical line relative to the reference surface positioned by the positioning means.

[0025] In a preferred embodiment of the present invention, the fixed pipe portion extended downward from the insertion means is fixed to the fixed support means, and the fixed support means comprises a reference metal fitting having a reference surface that is overlapped with the end flange, and a reinforcing metal fitting, and the fixed pipe portion is sandwiched between the reference metal fitting and the reinforcing metal fitting in the X direction and fixed to be integrated, and an insertion hole is provided that passes through the reinforcing metal fitting, the fixed pipe portion, and the reference metal fitting in the X direction, and the bolt means is inserted into the insertion hole and screwed into a nut of the end flange, thereby attaching and fixing the fixed pipe portion to the tip of the inner pipe.

[0026] The locking mechanism is formed by a rod having a sliding shaft portion that is inserted diametrically through the support tube portion so as to be freely slidable, an intermediate portion that is bent from the sliding shaft portion to extend upward outside the support tube portion and the insertion tube portion, and a locking portion that is bent from the upper end of the intermediate portion to be inserted removably into a receiving hole provided in the insertion tube portion, and is configured to prevent the insertion tube portion from coming out by inserting the locking portion into a locking hole provided in the end support with the insertion tube portion inserted into the end support. Effect of the Invention

[0027] According to the present invention, the column support device 30 attached and fixed to the end flange 19 of the inner pipe 12 of the expansion bracket 10 makes it possible to simply and easily support the end column 2E in an upright position in a predetermined posture. [Brief description of the drawings]

[0028] [Figure 1] FIG. 11 is a perspective view showing a state in which an expansion bracket according to the prior art is used. [Diagram 2] FIG. 1 is an exploded perspective view of an expansion bracket according to a conventional technique. [Diagram 3] FIG. 1 is a cross-sectional view of an expansion bracket according to the prior art. [Figure 4] FIG. 1 is a front view showing a state in which an end support is attached and fixed to the tip of an expandable bracket by a clamp fitting in the prior art. [Diagram 5] 1 shows conventional technology, where (A), (B), and (C) are perspective views showing the structure and function of a connecting joint, (D) is a cross-sectional view showing the positional relationship of the connecting joint to the X-axis and Y-axis on which the fastening parts of the fastening means are arranged, and (E) is a perspective view showing a problem that occurs when an end support is attached and fixed using a clamp fitting. [Figure 6] FIG. 1A is a perspective view showing an extension bracket in use according to an embodiment of the present invention, and FIG. 1B is a perspective view showing an insertion means of a pole support device. [Figure 7] FIG. 1A is a perspective view showing an embodiment of the present invention in a separated state of an expansion bracket and a column support device, and FIG. [Figure 8] 1 is a perspective view showing the relationship between a column support device attached and fixed to an expansion bracket and an end column. FIG. [Figure 9] 1A and 1B are cross-sectional views showing the operation of a locking mechanism in the insertion means of the column support device, and FIG. 1C is a perspective view showing the state in which an end column is supported in an upright position. [Figure 10] Regarding the column support device, (A) is a cross-sectional view showing the reference plane of the end flange of the expansion bracket and the fixed support means, and (B) is a perspective view showing the end flange, the fixed support means, and the insertion means in an exploded state. [Figure 11] 1A, 1B, and 1C are perspective views showing an embodiment of the fixed support means of the column support device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] As shown in Figures 6 and 7, the pillars 2 and cross members 4 that construct the scaffolding structure 1 are similar to those of the conventional technology described above, and the configuration of the telescopic bracket 6 is also similar to that of the conventional technology described above, so that identical components are indicated by the same symbols.

[0031] Therefore, the telescopic bracket 6 of the present invention is configured such that the column support device 30 is attached and fixed to the end flange 19 of the inner pipe 12, thereby enabling the end column 2E to be preferably supported upright. That is, the column support device 30 is attached and fixed by utilizing the nut 20 provided on the end flange 19, instead of the clamp metal fitting 22 described in relation to the prior art.

[0032] The column support device 30 is composed of a fixed support means 32 which is attached and fixed to the end flange 19 by overlapping it in a surface contact state to define a reference plane 31, and an insertion means 33 fixed to the fixed support means 32.

[0033] The insertion means 33 is for inserting the lower end of the end support 2E, and comprises an upward insertion tube portion 34 which is inserted into the lower end portion 2E of the end support, a support tube portion 35 which abuts and supports the lower end surface of the end support 2E, and a fixed tube portion 36 which extends downward, and is provided with a locking mechanism 37 for engaging the insertion tube portion 34 and the end support 2E to prevent them from coming loose.

[0034] The fixing support means 32 includes a reference metal fitting 38 that defines the reference surface 31, and a reinforcing metal fitting 39, and is integrated with the fixed pipe portion 36 of the insertion means 32 by fastening the reference metal fitting 38 to the fixed pipe portion 36 by welding or the like. As shown in Figures 7 and 8, the reference metal fitting 38 and the reinforcing metal fitting 39 are each fixed by welding to the outer circumferential surface of the fixed pipe portion 36 with the fixed pipe portion 36 sandwiched in the X direction. Then, an insertion hole 40 is formed that passes through the integrated reinforcing metal fitting 39, the fixed pipe portion 36, and the reference metal fitting 38 in the X direction.

[0035] 7(B) and 10(A), the outer surface of the end flange 19 has a flat surface parallel to the Y direction perpendicular to the X direction. In contrast, the reference metal fitting 38 has a flat surface that is superimposed in a surface-to-surface contact state on the outer surface of the end flange 19, and is configured to define a reference surface 31 parallel to the Y direction by this flat surface.

[0036] Then, with the reference surface 31 facing the end flange 19, a bolt means 41 consisting of a headed bolt is inserted into the insertion hole, and the ejection portion of the bolt means 41 is inserted into the introduction hole 21 of the end flange 19 and screwed into the nut 20, thereby attaching and fixing the fixed support means 32 to the end flange 19.

[0037] In this case, a positioning means 42 is provided between the end face flange 19 and the reference surface 31 of the reference metal fitting 38 in the axial rotation direction of the bolt means 41. In the illustrated embodiment, the positioning means 42 is configured to engage and lock an engaging portion 42a protruding from the end face flange 19 with an engaged portion 42b consisting of a hole or recess formed in the reference surface 31, but is not limited to this.

[0038] The positioning means 42 is configured to make the insertion means 33 stand up along the vertical line V when the fixing support means 32 is attached and fixed to the end flange 19 in a positioning state with respect to the axial rotation direction of the bolt means 41. In other words, the fixing support means 32 and the fixed tube portion 36 of the insertion means 33 are fixed and integrated under an arrangement relationship in which the insertion means 33 is parallel to the vertical line V with respect to the reference surface 31 in the state where the end flange is fixed. This makes it possible to align the end support 2E along the vertical line V when the end support 2E is inserted and supported by the insertion means 33.

[0039] The locking mechanism 37, like the locking mechanism 8 of the prior art, is configured to prevent dislodging by utilizing a locking hole 8f (see FIG. 5(C)) provided at the lower end of the end support 2E.

[0040] In the illustrated example, the locking mechanism 37 has a specific configuration similar to that of the locking mechanism 8 of the prior art, and is formed by a rod having a sliding shaft portion 37a inserted diametrically into the support tube portion 35, an intermediate portion 37b bent from the sliding shaft portion 37a and extending upward outside the support tube portion 35 and the insertion tube portion 34, and an engaging portion 37c bent from the upper end of the intermediate portion 37b and inserted removably into a receiving hole 37e provided in the insertion tube portion 34.

[0041] It is preferable that the rod is resiliently biased in a direction of inserting the locking portion 37c toward the receiving hole 37e of the insertion tube portion 35 by a coil spring 37d fitted onto the sliding shaft portion 37a. Therefore, when inserting the end support 2E into the insertion means 33, an operator pinches the middle portion 37b of the rod with his / her fingertips to pull out the locking portion 37c from the receiving hole 37e, and in this state, moves the lower end of the end support 2E down to a position where it abuts against the support tube portion 35 while fitting it onto the insertion tube portion 34, and after confirming that the locking hole 8f matches the receiving hole 37e, inserts the locking portion 37c into the locking hole 8f and the receiving hole 37e, whereby the end support 2E can be supported upright in a state where it is locked against withdrawal.

[0042] Furthermore, the end support 2E thus upright is positioned such that the four fastening portions 3a (flange holes) provided in the fastening means 3 (flanges) are positioned on the X-axis and Y-axis extending in the X-direction and Y-direction from the center of the support, respectively, as shown in FIG. 9.

[0043] To enable this positioning, the lock mechanism 37 of the insertion means 33 is installed at a specific position midway between the X-axis and the Y-axis, without interference between the sliding direction M of the sliding shaft portion 37a in the X-axis and the Y-axis. In other words, the fixed support means 32 and the fixed tube portion 36 of the insertion means 33 are fixed and integrated under an arrangement relationship in which the sliding direction M of the rod of the lock mechanism 37 is set at a specific position midway between the X-axis and the Y-axis as shown, based on the reference surface 31 of the reference fitting 38 when attached and fixed to the end face flange 19. This makes it possible to support the end support 2E in an upright position with the fastening portion 3a (flange hole) positioned on the X-axis and the Y-axis.

[0044] 11(A), (B) and (C) show an embodiment of the fixed support means 32. In FIG.

[0045] (First embodiment) Figure 11 (A) shows the first embodiment, in which a reference fitting 38 has retaining pieces 44, 44 bent from both side edges of a reference plate portion 43 which forms the reference surface 31, a contact piece 45 bent from the upper edge of the reference plate portion 43, and a bottom plate portion 46 bent from the lower edge, and the contact piece 45 is formed with an arc edge portion 45a which fits along the outer peripheral surface of the fixed pipe portion 36.

[0046] In contrast to this, the reinforcing metal fitting 39 has an opposing plate portion 47 fixed to the bottom plate portion 46 by welding or the like, and holding pieces 48, 48 are formed by bending both side edges of the opposing plate portion 47.

[0047] In the first embodiment, the fixed tube portion 36 of the insertion means 33 is inserted between the reference metal fitting 38 and the reinforcing metal fitting 39, and with its lower end placed on the bottom plate portion 46, it is embraced from its outer periphery by the retaining pieces 44, 44 and abutment piece 45 of the reference metal fitting 38 and the retaining pieces 48, 48 of the reinforcing metal fitting 39.

[0048] Then, while being held, the fixed pipe portion 36 is adjusted so that it is in a vertical position relative to the reference plane 31 and the sliding direction M of the locking mechanism 37 is in the above-mentioned positional relationship, and then the held portion is welded and fixed, thereby integrating the fixed support means 32 and the fixed pipe portion 36.

[0049] (Second Example) 11(B) shows a second embodiment, in which the reference metal fitting 38 and the reinforcing metal fitting 39 are provided in a separated state. The reference metal fitting 38 has holding pieces 50, 50 bent from both side edges of the reference plate portion 49 that forms the reference surface 31, and contact pieces 51, 51 bent from the upper and lower edges of the reference plate portion 49, respectively.

[0050] In response to this, the reinforcing metal fitting 39 has an opposing plate portion 52 that faces the reference plate portion 49, and holding pieces 53, 53 are formed by bending both side edges of the opposing plate portion 52.

[0051] In the case of the second embodiment, the reference metal fitting 38 and the reinforcing metal fitting 39 are attached from the X direction to the outer circumferential surface of the fixed pipe portion 36 of the insertion means 33 to clamp it. At that time, the position is adjusted so that the fixed pipe portion 36 is in a vertical position relative to the reference surface 31 and the sliding direction M of the lock mechanism 37 is in the above-mentioned positional relationship, and then the clamped portion is fixed by welding, whereby the fixing support means 32 and the fixed pipe portion 36 are integrated.

[0052] (Third Example) 11(C) shows a third embodiment, in which the reference metal fitting 38 and the reinforcing metal fitting 39 are provided in a separated state. The reference metal fitting 38 is formed by bending holding pieces 55, 55 from both side edges of a reference plate portion 54 that forms the reference surface 31, and a short cylinder 56 is fixed to the inside of the reference plate portion 49 by welding or the like. An arc edge portion 56a is formed on the edge of the short cylinder 56, which fits along the outer circumferential surface of the fixed pipe portion 36.

[0053] In response to this, the reinforcing metal fitting 39 is provided with an opposing plate portion 57 which faces the reference plate portion 53, and holding pieces 58, 58 are formed by bending both side edges of the opposing plate portion 57.

[0054] In the case of the third embodiment, the reference metal fitting 38 and the reinforcing metal fitting 39 are attached from the X direction to the outer circumferential surface of the fixed pipe portion 36 of the insertion means 33 to clamp it. At that time, the position is adjusted so that the fixed pipe portion 36 is in a vertical position relative to the reference surface 31 and the sliding direction M of the lock mechanism 37 is in the above-mentioned positional relationship, and then the clamped portion is fixed by welding, thereby integrating the fixed support means 32 and the fixed pipe portion 36. [Explanation of symbols]

[0055] 1. Scaffold Construct 2 pillars 2E End strut 2a Lower support 2b Upper post 3 Fastening means (flanges) 3a Fastening part (wedge hole) 4 Cross members 5 Scaffolding Planks 6 Connecting joint 6a Lower Insertion Tube 6b Upper insertion tube 6c Support pipe section 6d Guide hole 7 Locking pin mechanism 7a Leaf spring 7b Locking pin 7c Locking hole 8 Locking mechanism 8a Sliding shaft 8b middle part 8c Locking part 8d coil spring 8e Receptacle 8f Lock hole 10 Telescopic bracket 11 Outer tube 12 Inner tube 13 Guide means 13a Guide groove 13b Bolt 14 Locking means 14a Fastening bolt 15 Support structure 15a Brace 15b Reinforcement 16 Joint material 17 Fixation device 17a Locking fitting 17b Clamp fitting 18 Sleeve 19 End flange 20 Nut 21 Introduction hole 22 Clamp fitting 23 Fixing bracket 24 Rotating bracket 25 Axis 26 Rotating shaft 27 Fastening bolt 28 Mounting bolt 29 Prescribed pipe members 30 Post support device 31 Reference plane 32 Fixed support means 33 Insertion means 34 Insertion tube section 35 Support pipe section 36 Fixed pipe section 37 Locking mechanism 37a Sliding shaft 37b Middle part 37c Locking part 37d coil spring 37e Receiving hole 38 Reference bracket 39 Reinforcement bracket 40 Insertion hole 41 Bolt Means 42 Positioning means 42a Locking part 42b Locked part 43 Reference plate section 44 Holding piece 45 Contact piece 45a Circular edge 46 Bottom plate part 47 Opposing plate 48 Holding piece 49 Reference plate 50 Holding piece 51 Contact piece 51a Arc edge 52 Opposing plate part 53 Holding piece 54 Reference plate section 55 Holding piece 56 Short Cylinder 56a Circular edge 57 Opposing plate 58 Holding piece

Claims

1. An expandable bracket for a scaffolding structure constructed by arranging supports at intervals in the X-direction and Y-direction perpendicular to each other on a plane, The support (2) is provided with fastening means (3) having fastening portions (3a) arranged on an X axis and a Y axis extending from the center in the X direction and the Y direction, The telescopic bracket (10) comprises an outer tube (11) extending in the X direction from a tail end portion fixed to a scaffolding structure, and an inner tube (12) protruding from a tip end portion of the outer tube so as to be slidable and fixable, and is configured so that a bolt means inserted from the outside is screwed into an inner nut (20) against an end face flange (19) fixed to the tip end of the inner tube, and is provided with a pillar support device (30) located at the tip end of the inner tube for erecting an end pillar (2E), The column support device (30) is composed of a fixed support means (32) that defines a reference surface (31) when attached and fixed to the end face flange (19) via the bolt means (41), and an insertion means (33) that is fixed to the fixed support means, The insertion means (33) includes an insertion tube portion (34) that is inserted into the lower end of the end support, a support tube portion (35) that abuts against and supports the lower end surface of the end support, and a locking mechanism (37) that locks the insertion tube portion and the end support to prevent them from coming off. said fixing support means (32), said insertion means (33) and said locking mechanism (37) are fixed to each other in a positional relationship such that the fastening means (3) of the end support (2E) inserted into said insertion means is positioned so that the fastening portion (3a) is positioned on said X-axis and Y-axis, based on said reference plane (31).

2. A positioning means (42) is provided between the end flange (19) and the reference surface (31) of the fixed support means in an axial direction around the bolt means, The telescopic bracket in the scaffolding structure according to claim 1, characterized in that the insertion means (33) is arranged so as to insert and support the end support (2E) along a vertical line (V) with respect to the reference surface (31) positioned by the positioning means (42).

3. A fixed pipe portion (36) extending downward from the insertion means (33) is fixed to the fixed support means (32), The fixing support means (32) includes a reference metal fitting (38) having a reference surface (31) that is overlapped with the end face flange (19), and a reinforcing metal fitting (39), and is integrated by being fixed in a state in which the reference metal fitting and the reinforcing metal fitting sandwich the fixed pipe portion in the X direction, and is provided with an insertion hole (40) that penetrates the reinforcing metal fitting, the fixed pipe portion, and the reference metal fitting in the X direction.

3. The telescopic bracket for a scaffolding structure as claimed in claim 1 or 2, characterized in that the bracket is attached and fixed to the tip of the inner tube by screwing the bolt means (41) inserted into the insertion hole (40) into the nut (20) of the end flange (19).

4. 3. The telescopic bracket for a scaffolding structure according to claim 1 or 2, characterized in that the locking mechanism (37) is formed by a rod having a sliding shaft portion (37a) inserted diametrically through the support tube portion (35) so as to be slidable therethrough, an intermediate portion (37b) bent from the sliding shaft portion to extend upward outside the support tube portion and the insertion tube portion, and a locking portion (37c) bent from the upper end of the intermediate portion to be inserted detachably into a receiving hole (37e) provided in the insertion tube portion (34), and is configured to be locked and prevented from coming out by inserting the locking portion (37c) into a locking hole (8f) provided in the end support with the insertion tube portion (34) inserted into the end support (2E).

Images