JP2017048602A - Support structure of scaffold horizontal member and scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure of scaffold horizontal member and a scaffold capable of supporting a horizontal member from the bottom with a simple operation.SOLUTION: A support structure of scaffold horizontal member includes: an overhanging bracket 31 which is supported in a cantilever beam state with respect to a single-pipe strut 52, and an angle-brace 1 which is dispose at an angle between the single-pipe strut 52 and a front portion of the overhanging bracket 31 to support the overhanging bracket 31 from the bottom thereof. The angle-brace 1 is connected in such manner that, a tenon which is formed on an upper end of the angle-brace 1 is inserted into a tenon hole which is formed in the overhanging bracket 31 to open downward, and subsequently the angle-brace 1 is connected to the single-pipe strut 52 and to fixed using a clamp unit 16 formed at lower part of the angle-brace 1.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a support structure for a horizontal member when the horizontal member is supported by a diagonal member from below in a scaffold, and a scaffold having such a structure.

Conventionally, scaffolds that are temporarily constructed at construction sites or the like have been provided with a cane to reinforce the horizontal members attached in a cantilever shape. For example, Patent Document 1 has a cane 18 for supporting the scaffold bracket 10 from below as a horizontal member. Moreover, in patent document 2, the cane 18 has the cane 32 for supporting the horizontal part 31 from the downward direction about the bracket 3 as a horizontal member. These wands are also called carry frames, and the lower end is not fixed because it is assumed that a large load is not applied to the horizontal member, and the column is relatively laid on the horizontal member. It is the structure made to contact | abut.
Further, in the scaffolding, a footboard region is formed by laying a footboard on a horizontal member. However, there is a case where a sufficient footstep region for work cannot be secured in a position where the site is narrow and close to the ground. In that case, after stacking several layers of scaffolding from the ground, the footboard area is expanded at a high position. This is generally called widening of the scaffold. An example in which the scaffold is widened is shown in FIG. Here, there is an obstacle U in front of the wall surface W, and the lower space is a narrow region. In FIG. 17, the scaffold 100 is constructed such that the single tube struts 101 are arranged in parallel in the front-rear position with respect to the wall W, and the cloth material 102 serving as a horizontal member is fixed to the binding position and stacked. On the adjacent cloth material 102, a tread plate (not shown) is installed. The scaffolding bracket 103 is attached to the single-tube support column 101 of the scaffold 100 in an outer cantilever shape. A single tube strut 101 is newly connected to the tip position of the scaffold bracket 103, the cloth material 102 is increased, and the footboards are arranged in two rows, so that the footboard region is widened from the middle of the scaffold 100. Further, since the weight applied to the distal end position of the scaffold bracket 103 is increased in this way, the moment of the scaffold bracket 103 is increased, so that a firmer wand 105 different from the carrying frame is provided for reinforcement. Will be. The wand 105 fixes the clamp device 106 at the upper end side to the scaffolding bracket 103 and fixes the clamp device 107 at the lower end side to the single-tube support column 101 at the position where the bracket 103 for scaffolding is fixed. And it arrange | positions in the direction which stood up with respect to the horizontal member rather than the carrying frame so that the compressive stress of the cane 105 may become as large as possible.

JP-A-11-229615 JP 10-325239 A

However, reinforcement of the scaffold bracket 103 with the wand 105 when expanding the scaffold as described above has the following problems.
(1) When the upper and lower clamping devices 106 and 107 are fixed to the scaffolding bracket 103 or the single pipe support 101, the operator must move to the lower position and the upper position of the wand 105 for operation. It was troublesome. The same applies to the removal.
(2) In order to fix the upper clamping device 106 to the scaffolding bracket 103, the cane 105 is in a positional relationship such that it is disposed at a side surface position rather than the lower side of the scaffolding bracket 103. That is, the walking stick 105 is disposed at a position offset laterally from the scaffold bracket 103, and the walking stick 105 does not directly support the scaffold bracket 103 from below.
Therefore, there has been a demand for a technique that can be easily operated and supported from below the horizontal member in the wand using the clamp device. Further, not only the above-described widening of the scaffold but also such a technique is widely desired for a scaffold in which a walking stick is installed using a clamp device.
The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a support structure for a horizontal member in a scaffold that can be easily operated and supported from the lower side of the horizontal member, and a scaffold having such a structure.

In order to achieve the above object, as means 1, a horizontal member supported in a cantilever shape with respect to the column member is disposed obliquely between the column member and a position closer to the front of the horizontal member. In the support structure of the horizontal member in the scaffolding that is supported from below by the diagonal member, the tenon formed at the upper end of the diagonal member first with respect to the mortise formed in the horizontal member and opening downward. The diagonal member is connected by inserting the diagonal member, and the diagonal member is connected and fixed to the support member by connecting means formed at the lower portion of the diagonal member.
Further, as means 2, a horizontal member supported in a cantilever shape with respect to the column member is formed from below by an oblique member disposed obliquely between the column member and a position near the front of the horizontal member. In the support structure of the horizontal member in the scaffolding to be supported,
A tenon formed on the horizontal member and projecting downward is first fitted into a tenon formed at the upper end of the diagonal member to connect the diagonal member, while a connection formed at the lower portion of the diagonal member. The diagonal member is connected and fixed to the support member by means.

With this configuration, when the diagonal member is disposed to reinforce the horizontal member, the upper side of the diagonal member is connected in a relationship between the tenon and the mortise, and only the lower side is connected by the connecting means. Since it can be connected to the support member, the operator does not have to perform the connecting operation of the diagonal member at both the upper and lower positions, thereby improving workability. Further, the horizontal member can be supported from below.
Here, the “horizontal material” is a member that is laid horizontally in the scaffold, and includes, for example, an overhang bracket and a handrail. The horizontal member may be supported by any method as long as it is supported in a cantilever shape with respect to the column member. For example, it may be fixed with a wedge piece to a binding holder formed so as to surround a part in the circumferential direction of the outer periphery of the support column, or may be fixed with a clamping device, for example.

Further, as the means 3, the diagonal member can be swung at an upper position below the tenon.
Further, as the means 4, the diagonal member can be swung at an upper position below the mortise.
That is, the mortise or the mortise portion swings independently. Thereby, after connecting in the relationship between the horizontal member side and the tenon or mortise, the lower part of the diagonal member can be moved independently, and the connecting means can be easily connected to the column member.

Further, as the means 5, the mortise hole into which the tenon of the diagonal member is inserted is formed at the front end position of the horizontal member.
Further, as the means 6, the tenon to be inserted into the tenon hole of the diagonal member is formed at the front end position of the horizontal member.
If the mortise (or mortise) on the side of the horizontal member is in this position, there will be no obstacle even when, for example, a footboard is installed on the horizontal member. Is good because there is less.

Further, as means 7, when the diagonal member is connected between the diagonal member and the horizontal member in the relationship between the tenon and the mortise to the horizontal member side, the horizontal member side And holding means for holding the diagonal member in a connected state.
With this configuration, the operator connects the upper end side of the diagonal member in a tenon and mortise relationship, and the diagonal member does not fall off without temporarily supporting the diagonal member. Various operations including connecting and detaching the means to / from the column member are facilitated.

Further, as means 8, the holding means is an engaging member engaged with a part of the horizontal member, and the engaging member moves the diagonal member toward the horizontal member side with the tenon and the tenon. A first circumferential position that does not interfere even when the diagonal member is retracted in the direction of releasing the connection with respect to the horizontal member when connected in a hole relationship, and in the direction of releasing the connection of the diagonal member The diagonal member is disposed at the upper position of the diagonal member so as to be able to take a second circumferential position that interferes with the horizontal member when retracted, and the diagonal member is disposed at the first circumferential position. The engagement member is disposed at a position that interferes with the horizontal member by rotating the diagonal member in the circumferential direction and then moving the diagonal member to the second circumferential position. The diagonal member was prevented from being detached from the horizontal member.
This explains a specific configuration of the engaging member. If such an engaging member is provided on the diagonal member and engaged with a part of the horizontal member, the diagonal member can be supported by a simple operation so as not to drop off.
Here, the “engaging member” is preferably a hook-shaped hook member having a tip curved inward. This is because such a shape tends to be along the outer periphery of the horizontal member having a circular cross section. In addition, for example, the engaging member may be extended along the longitudinal direction of the diagonal member. If comprised in this way, an engaging member will not protrude large from the width | variety of an oblique material, and it contributes to compactization. Further, the portion that interferes with the horizontal member is preferably bent or curved in the inner direction of the diagonal member, for example. This is because such a configuration does not protrude from the width direction of the diagonal member, and the bent or curved portion just interferes by moving to the second circumferential position.

Further, as means 9, the holding means is a projecting body disposed so as to be able to appear and retract on the outer periphery of the tenon, and a through hole formed on the inner peripheral surface on the tenon hole side, and the oblique member is used as the horizontal member. When the tenon and the tenon hole are connected to each other, the protrusion is pushed relatively to the inner peripheral surface of the tenon hole to be retracted in the tenon direction and collated with the through hole. Thus, the protrusion is advanced into the through hole to prevent the oblique member from being detached from the horizontal member.
This also explains a specific configuration of the engaging member. If such an engaging member is provided on the diagonal member and engaged with a part of the horizontal member, the diagonal member can be supported by a simple operation so as not to drop off.

Further, as means 10, a holder is formed at a predetermined position on the outer periphery of the support member, and the horizontal member is supported by the wedge piece with respect to the holder.
That is, a specific support structure for the horizontal member will be described. With such a configuration, the horizontal member can be easily fixed at a predetermined position.
Further, as the means 11, the connecting means is a clamp device attached to the lower end of the diagonal member so as to be swingable.
As a result, the lower side of the diagonal member can be freely attached to any position of the column member regardless of the angle of the diagonal member.
Further, as the means 12, the connecting means is arranged so that the connecting means is overlapped with respect to the holder formed at a predetermined position on the outer periphery of the support member, and the holder and the connecting part are arranged in the overlapping manner. The main body is configured from a wedge member that is inserted and fixed from above.
As a result, it is possible to fix the lower side of the diagonal member simply by inserting the wedge member from the upper side by arranging the connecting member main body on the diagonal member side with respect to the support on the column member side. Work time is often shortened.
Further, as the means 13, the connecting portion main body is attached so as to be swingable with respect to the diagonal member. As a result, even if the diagonal member itself is arranged at various angles with respect to the support member, the positional relationship between the connecting portion main body and the holder can be always constant. As a premise of this means, the connecting portion main body may be fixed to the diagonal member.
Further, as the means 14, the diagonal member is configured to prevent the diagonal member from being detached from the horizontal member when the upper end side is connected to the horizontal member side in the relationship of the tenon and the mortise. In this stage, the diagonal member can be swung in the direction of the column member.
According to this structure, after it is determined that the diagonal member cannot be detached by connecting the upper end side to the horizontal member side, that is, even if the operator does not support the diagonal member. For the first time, the diagonal member is swung in the direction of the column member and the lower end side of the diagonal member can be fixed. If the upper end of the material is not attached so as not to be detached, the oblique material cannot be swung in the direction of the column member, and as a result, the upper end of the oblique material is reliably attached so as not to be detached from the horizontal member.

  According to the present invention, when the horizontal member is supported by the diagonal member, the installation work is simple and the workability is improved, and the horizontal member can be supported from the lower side.

The perspective view of the wand used for the temporary scaffold of Embodiment 1 of this invention. (A) is explanatory drawing from the front direction which expands and shows the upper end side in the cane of FIG. 1, (b) is explanatory drawing from the front direction which expands and shows a lower end side. Explanatory drawing explaining the state just before connecting the tenon of a cane upper end with respect to an overhanging bracket. Explanatory drawing immediately after connecting the tenon of a cane upper end with respect to an overhanging bracket. (A) And (b) is explanatory drawing of the state rotated 90 degree | times, after connecting the tenon of a cane upper end with respect to an overhanging bracket. Explanatory drawing of the state which connected the tenon of the upper end of a cane with respect to an overhanging bracket, and after rotating 90 degree | times, supported a cane with a hook, and standing the single pipe | tube support | pillar at the end of an overhanging bracket. (A) Explanatory drawing explaining the state which hangs down in the state which connected the tenon of the upper end of a cane with respect to the overhanging bracket, and was supported with the hook, (b) is a lower end of a cane from the state of (a) Explanatory drawing of the state which fixed the clamp apparatus of this to the single pipe | tube support | pillar. The side view of the state which installed the construction scaffold of this Embodiment 1. FIG. The perspective view of the construction scaffold of this Embodiment 1. FIG. Explanatory drawing explaining the state just before connecting the lower end side of a cane to a single pipe | tube support | pillar in this Embodiment 2. FIG. Explanatory drawing explaining the state just before connecting the lower end side of a cane to a single pipe | tube support | pillar in this Embodiment 2, and inserting a wedge piece. Explanatory drawing explaining the state which connected the lower end side of a cane to the single pipe | tube support | pillar in this Embodiment 2, and wasted the wedge piece. (A) is explanatory drawing from the front direction which expands and shows the upper end side in the cane of Embodiment 3, (b) is explanatory drawing from the side direction which expands and shows an upper end side. FIG. 6 is a perspective view of a lock pin unit used in Embodiment 3. Explanatory drawing explaining the state just before connecting the tenon of a cane upper end with respect to an overhanging bracket in this Embodiment 3. FIG. Explanatory drawing immediately after connecting the tenon of a cane upper end with respect to the overhanging bracket in this Embodiment 3. FIG. The side view of the state which installed the conventional construction scaffold.

Hereinafter, a support structure for a horizontal member in a scaffold will be described with reference to the drawings as a specific embodiment of the present invention.
(Embodiment 1)
FIG. 1 is a perspective view of a cane 1 as an oblique member, which is a main member for widening the scaffold according to the first embodiment. As shown in FIGS. 1 and 2, the wand 1 includes a wand body 2 made of an alloy pipe member having a circular cross section. A pair of through holes (attachment holes) 3 are formed at positions facing the front and rear ends of the cane main body 2 at 180 degrees.
A tenon 5 is disposed on the upper end of the cane main body 2 via a tenon bracket 4. The tenon side bracket 4 is a member formed by bending a rectangular steel plate in a rectangular shape at two locations at right angles to form a channel shape, and is arranged in parallel to the left and right opposing positions of the tenon attachment part 4a and the tenon attachment part 4a. And a pair of support portions 4b. The interval between the support portions 4b is exactly the same as the outer diameter of the wand body 2. The tenon side bracket 4 is fastened by a bolt 7 and a nut 8 as shown in FIG. 2A in a state where the through hole (attachment hole) 6 formed in the support portion 4b and the through hole 3 of the cane body 2 are collated. The member is swingably supported. The center axis of the bolt 7 is the center of oscillation.
The tenon 5 is composed of an alloy pipe member having a circular cross-section with a smaller diameter than the wand body 2 formed with a narrowed tip. The tenon 5 is fixed to the upper surface of the tenon mounting portion 4a of the tenon side bracket 4 by welding. A ring-shaped stopper portion 9 is formed on the outer periphery of the tenon near the tenon mounting portion 4a. The outer diameter of the stopper portion is the same as the outer diameter of the wand body 2 in the present embodiment. A pair of front and rear hooks 10 having the same shape made of an alloy bar as a holding means and an engaging member are disposed on the side surface of the tenon side bracket 4 so as to be adjacent to the tenon 5. Both hooks 10 are extended toward the front end of the tenon 5 along the tenon 5 at positions shifted 180 degrees with the tenon 5 interposed therebetween. Both hooks 10 have a J-shaped appearance with the front side curved so as to intersect the width direction of the tenon 5 at a position that does not protrude to the tip side of the tenon 5. As will be described later, the positions of both hooks 10 are determined based on the relationship with the target (the bracket main body 32 in the first embodiment) that is engaged when fitted into the mortise. The inner peripheral curves of the curved portions of both hooks 10 are substantially coincident with the outer peripheral curve of the wand main body 2.

A clamp device 16 as a connecting means is disposed on the lower end of the cane main body 2 via a clamp-side bracket 15. The clamp side bracket 15 has the same shape as the tenon side bracket 4 and is composed of a clamp attachment portion 15a and a pair of support portions 15b arranged in parallel to the left and right opposing positions of the clamp attachment portion 15a. The clamp-side bracket 15 is fastened with bolts 7 and nuts 8 as shown in FIG. 2 (b) in a state in which the through-hole (attachment hole) 17 formed in the support portion 15 b is matched with the through-hole 3 of the cane body 2. The member is swingably supported. The center axis of the bolt 7 is the center of oscillation. The clamp side bracket 15 is supported in the same direction as the direction in which the tenon side bracket 4 is supported.
The clamp device 16 includes a catch body 19, an arm portion 20, and a bolt portion 21. The arm portion 20 is connected to the tip end side of the catch body 19 by a bearing portion 22 so as to be swingable. The catch body 19 is fixed to the lower surface of the clamp attachment portion 15a by welding. The catch main body 19 and the arm portion 20 are arranged so that the inner peripheral surfaces 23A and 23B curved in a concave shape face each other. The bolt part 21 is connected to the base end side of the catch body 19 by a bearing part 23 so as to be swingable. The bolt portion 21 has a male screw 24 formed on the outer periphery, and a nut 25 is screwed to the male screw 24 so that the bolt portion 21 can be advanced and retracted in the longitudinal direction. As shown in FIG. 2 (b), the clamping device 16 is configured to push the tip of the arm 2 toward the catch body 19 by the nut 25 in a state where the tip of the arm 2 is engaged with the bolt 21. The tightening object (single pipe support 52 described later in the first embodiment) disposed between the surfaces 23A and 23B is tightened to fix itself to the tightening object.

  Next, the overhanging bracket 31 which is a main member for widening the scaffold in combination with the wand 1 will be described. As shown in FIGS. 3 to 6, the overhanging bracket 31 includes a bracket main body 32 made of an alloy pipe member having a circular cross section and disposed horizontally. The bracket body 32 is a pipe material having the same diameter and the same material as the cane body 2 of the cane 1. A wedge piece 33 is formed at the base end of the bracket body 32. The wedge piece 33 includes a base portion 33a having a large diameter and an insertion portion 33b that gradually narrows from the base portion 33a, and is fixed to the bracket body 32 by welding. A connecting pipe 34 extending in the orthogonal direction is formed at the tip of the bracket body 32. The connecting pipe 34 is also fixed to the bracket body 32 by welding. The connecting pipe 34 is made of a pipe material made of an alloy having the same outer diameter as the bracket body 32 and slightly larger than the outer diameter of the tenon 5, and most of the connecting pipe 34 (about 75% of the total length) is the bracket body 32. It is arrange | positioned above. The distal end of the connecting pipe 34 is configured to be constricted. A positioning ring 35 is loosely fitted on the outer peripheral position of the connecting pipe 34 above the bracket body 32. A guide groove 36 cut out in an L shape is formed in the positioning ring 35, and a pin 37 protruding from the outer periphery of the connecting pipe 34 is exposed in the guide groove 36. Therefore, the positioning ring 35 can be arranged at two kinds of heights by moving the pins 37 to both end positions of the guide groove 36. This is to cope with a difference in height between a first binding holder 61 and a second binding holder 62 described later. A tenon 38 is formed above the positioning ring 35 of the connecting pipe 34. The lower end of the connecting pipe 34 is an opening 34a, and a mortise is formed from the opening 34a to the inside of the pipe. A carrying frame 39 is formed below the bracket body 32 obliquely from a position slightly closer to the connecting pipe 34 side in the longitudinal direction of the bracket body 32 to a position below the wedge piece 33. A contact plate 40 is formed at the tip of the carry frame 39. A reinforcing frame 41 is disposed between the carry frame 39 and the bracket body 32.

Next, an example of a construction scaffold using such a wand 1 and the overhanging bracket 31 will be described. First, the outline of the construction scaffold 51 is demonstrated based on FIG.8 and FIG.9. In the first embodiment, the erection scaffold 51 includes a single pipe column 52 as a column member, three types of cloth materials 53 to 55, two types of footboards 56 and 57, a jack base 58, and the above cane 1 and the overhang. A bracket 31 is included. Since the single pipe support 52, the cloth materials 53 to 55, the footboards 56 and 57, the jack base 58, and the like are well-known structures, detailed description thereof will be omitted. In the first embodiment, the scaffold 1 is arranged in a narrow region between the wall surface W and the front obstacle U, and a scaffold is constructed in which the scaffold is widened above the obstacle U.
First, a plurality of jack bases 37 are arranged at predetermined intervals in the vicinity of the wall surface W and the obstacle U as shown in FIG. 8, and predetermined in directions parallel to the surfaces of the wall surface W and the obstacle U as shown in FIG. Arrange at intervals. Then, the single pipe support 52 is connected to each jack base 58.
The single tube struts 52 are provided with tightening positions 60 at predetermined intervals, and each of the tightening positions 60 is opposed to each other by a pair of first tightening holders 61 disposed at the same height, and both the first tightening positions 61. It is composed of a pair of second binding holders 62 disposed at the same height so as to be 180 degrees opposite to the positions offset in the axial direction with respect to the binding holder 61 and 90 degrees in the circumferential direction. Here, first, two types of cloth materials 53 and 54 are respectively installed between the first binding holders 61 and the second binding holders 62 of the single-tube support column 52. In the first embodiment, the fastening positions 60 of the single pipe struts 52 are provided at eight locations, and the spacing between the adjacent fastening positions 60 of each single pipe strut 52 is equal (450 mm in the first embodiment). Has been. In the first embodiment, the tread plate 56 is installed on the cloth material 53 at the fourth and eighth positions from the bottom. In this way, the first stage (lower floor) of the construction scaffold 51 can be assembled.

In the first embodiment, since there is an obstacle U in the first stage of the construction scaffold 51, only the tread board 56 is laid. However, the cane 1 is attached to the second stage (upper floor) where the obstacle U does not become an obstacle. Use and widen it so that another tread 57 is laid. The widening process will be described below.
As shown in FIG. 3, the worker supports the overhanging bracket 31 with respect to the uppermost binding position 60 of the single pipe column 32 on the obstacle U side that constitutes the first stage of the scaffold 31. The wedge piece 33 is engaged with the first binding holder 61 of the overhanging bracket 31, and the abutment plate 40 at the tip of the carrying frame 39 is brought into contact with the side surface of the single tube support 32 so that the bracket body of the overhanging bracket 31 32 is supported horizontally. As shown in FIG. 3, the operator supports the wand 1, approaches the wand 1 from the lower end side of the connection pipe 34, and inserts the tenon 5 into the connection pipe 34 from the opening 34 a. Hereinafter, the operator holds and supports the cane 1 (the cane body 2) until the state shown in FIG. At this time, it is necessary that the hook 10 on the side of the wand 1 does not interfere with the bracket body 32 as the wand 1 is raised, that is, the hook 10 is not always in the lower position of the bracket body 32. A pair of hooks 10 are arranged at positions facing each other by 180 degrees. Therefore, the position where both hooks 10 just pass the side surface of the bracket body 32, that is, when the tenon 5 of the wand 1 is fitted into the connecting pipe 34, the central axis of the bolt 7 of the tenon side bracket 4 (swing center) By arranging so that the line) is parallel to the extending direction of the bracket body 32, both hooks 10 can advance without interfering with the bracket body 32.
As shown in FIG. 4, the tenon 5 of the wand 1 is inserted from the lower end side of the connecting pipe 34, and the upper end surface of the stopper portion 9 of the tenon 5 is brought into contact with the lower end of the connecting pipe 34, that is, the opening 34a. Let In this state, the bent tip position of the hook 10 is disposed slightly above the uppermost portion of the connection pipe 34, so that the hook 10 remains connected to the connection pipe even if the wand 1 is rotated in the circumferential direction at this position. 34 is not interfered with. That is, the attachment position of the hook 10 with respect to the tenon 5 is determined in relation to the position of the stopper portion 9. At this stage, as shown in FIGS. 5A and 5B, the wand 1 is rotated 90 degrees. At this stage, when the operator releases the cane 1, the cane 1 is slightly moved down by its own weight, and the hook 10 is locked to the connecting pipe 34 on the overhanging bracket 31 side (holding state).

In the state where the hook 10 on the side of the cane 1 is locked to the connecting pipe 34 on the side of the overhanging bracket 31, as shown in FIG. 7A, the tenon 5 is connected to the connecting pipe 34. It hangs down in the state of being inserted in. At this time, the center axis (swing center line) of the bolt 7 of the tenon side bracket 4 is arranged in a direction orthogonal to the extending direction of the bracket body 32 of the overhanging bracket 31. That is, the cane main body 2 swings with respect to the tenon side bracket 4, and the swinging direction is a direction in which the single tube support 52 is in contact with or separated from the single tube support 52. At this time, the center axis (swing centerline) of the bolt 7 of the clamp side bracket 15 is also arranged in a direction orthogonal to the extending direction of the bracket body 32 of the overhanging bracket 31.
The operator holds the wand body 2 and pulls it toward the single tube strut 52 side to swing the clamp device 16 together with the clamp side bracket 15 in the direction of the single tube strut 52. And the clamp apparatus 16 is operated and it fixes to the single pipe | tube support | pillar 52. FIG. At this time, the entire cane 1 supported by the hook 10 is slightly pushed up so that the upper end surface of the stopper portion 9 is brought into contact with the lower end of the connecting pipe 34 again. In addition, when removing the cane 1 from the overhanging bracket 31, the operation reverse to the above is performed.
The above mounting operation of the overhanging bracket 31 and the cane 1 for widening is performed on each single-pipe column 52 arranged along the surface direction of the obstacle U, and then shown in FIGS. 8 and 9. Thus, the tread plate 57 is installed on the overhanging bracket 31. Thereafter, the single-tube strut 52 and the cloth materials 53 to 55 are assembled in the upper layer in such a widened state.

With the configuration as described above, the construction scaffold 51 of the first embodiment has the following effects.
(1) When the overhanging bracket 31 is arranged for widening the erection scaffold 5, unlike the conventional case, the wand 1 that can be supported in the relationship between the tenon and the mortise is used, so the connecting work on the upper end side is simplified. Since it is only necessary to fix the clamp device 16 on the lower end side, the work is simplified and the work efficiency is improved.
(2) When viewed in plan, the cane 1 is arranged directly below the overhanging bracket 31, and the cane 1 supports the overhanging bracket 31 from below. As a result, a load is applied directly in the longitudinal direction of the wand 1, and the weight applied to the overhanging bracket 31 can be supported with a large force.
(3) After the tenon 5 of the wand 1 is connected to the connecting pipe 34, the wand 1 is suspended from the overhanging bracket 31 even if the operator does not necessarily support the hook 10, so that in the next operation of the operator Work efficiency increases as hands are freed up.
(4) After the tenon 5 of the cane 1 is connected to the connecting pipe 34, the hook 10 can be easily extended and locked to the bracket body 32 of the bracket 31 by rotating the cane 1 90 degrees. Operationally advantageous.
(5) After the tenon 5 of the wand 1 is connected to the connecting pipe 34, the wand 1 is rotated 90 degrees and the hook 10 is engaged. Therefore, the efficiency of a series of operations for attaching the clamp device 16 to the single-tube strut 52 by pulling the wand 1 is increased.

(Embodiment 2)
The second embodiment will be described with reference to FIGS. The second embodiment is an example in which another connecting means is used in place of the clamp side bracket 15 and the clamp device 16 disposed at the lower end position in the wand 1 of the first embodiment. Only the parts different from the first embodiment will be described, and the other parts are the same as those of the first embodiment, and the description thereof will be omitted.
A connecting plate 72 as a connecting portion main body is attached to the lower end of the cane main body 71 of the cane 70 so as to be swingable on the front surface near the lower end of the cane 71. The connection plate 72 is formed by connecting two identically shaped plates with a connection pin 73 so as to have a hollow portion therein, and an upper opening 72a and a lower opening 72b are formed. In the drawing of the connecting plate 72, a cut portion 74 that is cut into a rectangle is formed on the left side (that is, the front portion facing the single tube support column 52), leaving a region facing the upper and lower openings 72a and 72b.
A slider 75 is loosely fitted in the connecting plate 72 so as not to drop off from the upper and lower openings 72a and 72b. The slider 75 includes a slider body 76 and a wedge piece 77 as a wedge member. The wedge piece 77 extends from the upper side to the lower side substantially in parallel with the slider main body 75 in front of the slider main body 75 (that is, the side facing the single tube support column 52). The slider body 76 has a boat paddle shape with a wide lower body, and a bulging portion 78 for hitting with a hammer that also serves as a drop-off prevention is formed at the upper end of the slider body 76. The wedge piece 77 is tapered. The wedge piece 77 can pass through the cut portion 74 as the slider body 76 moves up and down. When the wedge piece 77 is moved down most, the tip of the wedge piece 77 passes through the first binding holder 61 and is disposed at a position facing the lower opening 72b.

Next, the connection operation | work to the single pipe | tube support | pillar 52 side of the lower end of the wand 1 using the connection means of such a structure is demonstrated. It is assumed that the upper end side of the cane 71 has already been connected in the process according to the first embodiment. As shown in FIG. 10, first, the lower end of the cane 71 is brought close to the binding position 60 of the pipe support 52. At this time, the slider 75 is arranged at the uppermost position. Then, as shown in FIG. 11, the connection plate 72 is brought close to the single tube support 52 so that the first binding holder 61 facing the side of the wand 71 is accommodated in the cut portion 74. By moving the wedge piece 77 downward in this state, the connection plate 72 and the first tightening holder 61 are connected (state shown in FIG. 12). The wedge piece 77 is firmly fixed to the first binding holder 61 by hitting the bulging portion 78 with a hammer.
On the other hand, when removing the connecting plate 72 from the first binding holder 61, the lower end of the slider body 76 in the most suspended state in FIG. 12 is hit with a hammer to release the fixing force by the wedge piece 77, and the entire slider 75 is lifted. Then, the connecting plate 72 is separated from the first binding holder 61 as shown in FIG.

By constructing as described above, the construction scaffold 51 of the second embodiment has the following effects in addition to the same effects as the first embodiment (1) and (2).
(6) The work of tightening with a nut for fixing as in the case of a clamp device is not required, and the work efficiency is improved.

(Embodiment 3)
The third embodiment will be described with reference to FIGS. The third embodiment is an example in which another holding means is used in place of the hook 10 provided alongside the tenon 5 disposed at the upper end position in the wand 1 of the first embodiment. Further, the connecting pipe 34 is different from the overhang bracket 31 in the first embodiment. Only the parts different from the first embodiment will be described, and the other parts are the same as those of the first embodiment, and thus detailed description will be omitted.
In the third embodiment, a tenon 81 is disposed via a tenon side bracket 4 similar to that in the first embodiment. A ring-shaped stopper portion 82 is formed on the outer periphery of the tenon 81 at a position closer to the tenon mounting portion 4a as in the first embodiment. The tenon 81 is formed with a pair of circular through holes 83 at positions opposed to each other by 180 degrees. A straight line connecting the centers of both through-holes 83 is orthogonal to the central axis (swing centerline) of the bolt 7.
As shown in FIGS. 13 and 14, a lock pin unit 84 is disposed in the tenon 81. The lock pin unit 84 includes a unit main body 84 that is bent into a parabolic shape that serves as a leaf spring, and a pin 86 that is formed by bending the tip of the unit main body 84 into a protruding shape. The upper end of the pin 86 is cut off obliquely to form a contact portion 86a. The lock pin unit 84 is disposed in a state where it is urged into the tenon 81, and a pin 86 is projected outward from the through hole 83. Therefore, when the pin 86 is pushed into the tenon 81 in a state where the lock pin unit 84 is disposed in the tenon 81, the pin 86 is pushed back in the through hole 83 by the urging force of the unit main body 84.

In the third embodiment, the overhanging bracket 87 into which the tenon 81 is fitted is a connecting pipe 88 different from the overhanging bracket 31 of the first embodiment. Hereinafter, the connection pipe 88 will be mainly described, and in the drawing, the same member numbers as those in the first embodiment are given and detailed description thereof will be omitted. The connecting pipe 88 is fixed to the bracket body 32 by welding. The connecting pipe 88 is made of an alloy pipe material having the same outer diameter as the bracket main body 32 and slightly larger than the outer diameter of the tenon 81, and most (about 75% of the total length) of the connecting pipe 88 is the bracket main body 32. It is arrange | positioned above. The distal end of the connecting pipe 88 is configured to be constricted. A positioning ring 89 is formed at a position above the bracket body 32 and at the outer peripheral position of the connecting pipe 88. The lower end of the connecting pipe 88 is an opening 88a, and a mortise hole is formed from the opening 88a to the inside of the pipe. A pair of circular through-holes 90 is formed at a position below the positioning ring 89 and opposed by 180 degrees. The distance from the opening 88 a to the through hole 90 coincides with the distance from the upper end of the stopper portion 82 on the tenon 81 side to the through hole 83.
The lock pin unit 84, the through hole 83, the through hole 90 of the connecting pipe 88 and the like constitute a holding means.

Next, the operation of the lock pin unit 84 when the tenon 81 of the wand 1 is connected to the connection pipe 88 of the overhanging bracket 87 will be described.
As shown in FIG. 15, the tenon 81 at the upper end of the cane 1 is inserted from the opening 88 a of the connecting pipe 88 of the overhanging bracket 31 with the bracket body 32 supported horizontally. With the insertion, the pin 86 on the tenon 81 side is pushed by the abutment portion 86a interfering with the opening 88a and retracted into the tenon 81. Thereafter, the tenon 81 continues to be pushed relatively to the inner peripheral surface. 81 advances smoothly. The inserted tenon 81 is positioned with the upper end of the stopper 82 contacting the opening 88. At this time, the pin 86 that has been retracted moves forward in a position where the tenon 81 advances and the phase of the through hole 83 and the through hole 90 coincides, and the tenon 81 is locked to the connecting pipe 88 (see FIG. 16). State). At this time, the center axis (swing centerline) of the bolt 7 that supports the tenon bracket 4 is orthogonal to the extending direction of the connecting pipe 88. Since the upper end of the wand 1 is held in this state, the operator does not need to support the wand 1, and subsequently connects the lower end side to the single tube support 52 as in the first or second embodiment. .
By constructing as described above, the erection scaffold 51 of the third embodiment exhibits the following effects in addition to the same effects as in the first embodiment (1) and (2).
(7) Simply insert the tenon 81 into the connecting pipe 88 and advance it until the stopper portion 82 abuts against the opening 88, so that the lock mechanism by the lock pin unit 84 acts and the wand 1 is suspended. Therefore, in the next work of the worker, a hand becomes free and work efficiency is improved.
(8) At the position where the lock mechanism by the lock pin unit 84 is operated, the swinging direction of the cane 1 is directed toward the single tube column 52 for attaching the clamp device 16, so that the subsequent cane 1 is pulled. Thus, the efficiency of a series of operations for attaching the clamping device 16 to the single pipe support 52 is improved.

It should be noted that the present invention can be modified and embodied as follows.
In the above embodiment, the uniaxial bolt 7 is used to support the wand 1 so as to be swingable, but swinging means such as a universal joint may be used.
In the second embodiment, the connecting plate 72 can be swung on the cane 1 but may be fixed without swinging.
-The shape of the lock pin unit 84 of Embodiment 3 is an example.
In the construction scaffold 51 of the above-described embodiment, such a cane 1 is used for widening, but even if it is not wide, the cane 1 for supporting the overhanging bracket 31 may be applied. Good.
The relationship between the tenon and the tenon hole is the tenon 581 on the side of the cane 1 in the above embodiments, but this is reversed and a tenon hole is provided in the cane 1 on the connecting pipe 34 side of the overhanging bracket 31. A mortise may be provided.
Since the holding means and the connecting means shown in the above embodiments are examples, the holding means and the connecting means having other configurations may be used.
-Besides, it is free to implement in a mode that does not depart from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Brace as diagonal material, 5,81 ... Tenon, 16 ... Clamp apparatus as a connection means, 31 ... Overhang bracket as horizontal member, 34 ... Connection pipe which comprises mortise, 51 ... Temporary installation as a scaffold Scaffolding, 52... Single tube strut as a strut member, 72... Connecting plate constituting connecting means, 75... Slider constituting connecting means.

Claims (15)

A scaffold that supports a horizontal member supported in a cantilever shape with respect to a column member from below by a diagonal member disposed obliquely between the column member and a position near the front of the horizontal member. In the support structure of the horizontal member in
A tenon formed at the upper end of the diagonal member is inserted into a tenon formed in the horizontal member and opening downward, and the diagonal member is connected to the tenon formed at the lower portion of the diagonal member. A support structure for a horizontal member in a scaffold, wherein the diagonal member is connected and fixed to the support member by means. A scaffold that supports a horizontal member supported in a cantilever shape with respect to a column member from below by a diagonal member disposed obliquely between the column member and a position near the front of the horizontal member. In the support structure of the horizontal member in
A tenon formed on the horizontal member and projecting downward is inserted into a tenon formed on the upper end of the diagonal member to connect the diagonal member, while a connecting means formed at the lower portion of the diagonal member. A support structure for a horizontal member in a scaffold in which the diagonal member is connected and fixed to the support member.   The support structure for a horizontal member in a scaffold according to claim 1, wherein the diagonal member is swingable at an upper position thereof and a lower position than the tenon.   The support structure for a horizontal member in a scaffold according to claim 2, wherein the diagonal member is swingable at an upper position thereof and at a lower position than the mortise.   The support structure for a horizontal member in a scaffold according to claim 1 or 3, wherein the mortise hole into which the tenon of the diagonal member is inserted is formed at a tip position of the horizontal member.   The support structure for a horizontal member in a scaffold according to claim 2 or 4, wherein the tenon inserted into the tenon hole of the diagonal member is formed at a tip position of the horizontal member.   When the diagonal member is connected to the horizontal member side in the relationship between the tenon and the mortise between the diagonal member and the horizontal member, The support structure for a horizontal member in a scaffold according to any one of claims 1 to 6, wherein holding means for holding the diagonal member in a connected state is provided. The holding means is an engaging member engaged with a part of the horizontal member, and the engaging member connects the diagonal member to the horizontal member side in a relationship between the tenon and the tenon hole. When the diagonal member is retracted in the direction of releasing the connection with respect to the horizontal member, the first circumferential position that does not interfere with the horizontal member and the horizontal member when the diagonal member is retracted in the direction of releasing the connection. Disposed at the upper position of the diagonal so as to be able to take a second circumferential position that interferes with the material,
By connecting the diagonal member to the frame side in a state of being arranged at the first circumferential position, and then rotating the diagonal member in the circumferential direction and moving it to the second circumferential position. The horizontal member in a scaffold according to claim 7, wherein the engaging member is disposed at a position where the engaging member interferes with the horizontal member to prevent the diagonal member from being detached from the horizontal member. Support structure.   The holding means is a protrusion disposed on the outer periphery of the tenon, and a through hole formed in the inner peripheral surface of the tenon hole side. When the mortise is connected in relation to the mortise, the protrusion is moved relatively to the inner peripheral surface of the mortise to retract in the mortise direction, and the protrusion is matched with the through-hole. The support structure for a horizontal member in a scaffold according to claim 7, wherein the diagonal member is advanced into a through hole to prevent the diagonal member from being detached from the horizontal member.   The scaffold according to any one of claims 1 to 7, wherein a holder is formed at a predetermined position on an outer periphery of the support member, and the horizontal member is supported by a wedge piece with respect to the holder. Support structure for horizontal members in Japan.   The support structure for a horizontal member in a scaffold according to any one of claims 1 to 8, wherein the connecting means is a clamp device attached to a lower end of the diagonal member so as to be swingable.   The connecting means is inserted from above the connecting portion main body that is arranged in an overlapping manner with respect to the holder formed at a predetermined position on the outer periphery of the column member, and the holder and the connecting portion main body that are arranged in an overlapping manner from above. The support structure for a horizontal member in a scaffold according to any one of claims 1 to 8, wherein the support member is configured by a wedge member that is fixed.   The support structure for a horizontal member in a scaffold according to claim 12, wherein the connecting portion main body is attached so as to be swingable with respect to the diagonal member.   The diagonal member is configured to prevent the diagonal member from being detached from the horizontal member when the upper end side is connected to the horizontal member side in the relationship between the tenon and the tenon hole. The support structure for a horizontal member in a scaffold according to claim 1, wherein the support member can swing in the direction of the support member.   The scaffold provided with the support structure of the horizontal member in the scaffold of Claims 1-14.

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