JP2002038711A - Tread supporting structure in temporary scaffold and temporary scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tread supporting structure in a temporary scaffold and the temporary scaffold, in which a general-purpose tread can be used and which is advantage at cost. SOLUTION: A support bracket 14 and holding brackets 15 are installed rotatably to a support 11 constituting a scaffold frame for the temporary scaffold. The treads 12 are supported under a held state by tread inserting sections 29 on the base end sides of the holding brackets 15 and hooks 30 for holding the treads on the front end sides, and displaced at approximately horizontal positions and erected positions on the basis of the rotary operation of the holding brackets 15. Then, the support bracket 14 engages and holds the holding brackets 15 at each position at the approximately horizontal position and the erected position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tread support structure for supporting a tread on a scaffold frame of a temporary scaffold and a temporary scaffold.

[0002]

2. Description of the Related Art Conventionally, when a tread is supported on a scaffold frame of a temporary scaffold, a support bracket is attached to the scaffold frame in a cantilever state, and the tread is horizontally suspended between the support brackets. Is being done. However, when unloading materials, the overhanging treads may be an obstacle.
In view of this, the following flip-up type tread support structure capable of flipping the tread from a horizontally supported state to an upright state has been proposed.

In this flip-up type tread support structure, a support pin protrudes laterally from a support bracket, and a locking groove corresponding to the support pin is provided on a side surface of the tread. I have. Then, the tread plate can be flipped up by rotating the tread plate with the support pin as a fulcrum.

[0004]

However, in the case of the above-described tread support structure, only a special tread having a locking groove can be used, and a general-purpose tread having no locking groove cannot be used. For this reason, it is necessary to prepare a special tread plate by custom order or the like, which is disadvantageous in terms of cost.

The present invention has been made by focusing on the problems existing in the prior art as described above. An object of the present invention is to provide a tread support structure and a temporary scaffold in a temporary scaffold which can use a general-purpose tread and are cost-effective.

[0006]

According to one aspect of the present invention, there is provided a tread support structure for supporting a tread on a scaffold frame of a temporary scaffold. The holding bracket is rotatably attached, the tread plate is supported by the bracket in a holding state, and the tread plate is displaced between a substantially horizontal position and a retracted position based on the turning operation of the bracket. Make a summary.

According to a second aspect of the present invention, in the stepping board support structure for the temporary scaffold according to the first aspect, the holding bracket is supported rotatably in a cantilever state with respect to the scaffold frame. The gist of the present invention is to regulate the movement of the tread plate in the lateral direction at two points on the base end side and the distal end side.

According to a third aspect of the present invention, in the stepping plate support structure for a temporary scaffold according to the first or second aspect, a plurality of the holding brackets are attached to a scaffold frame, and two adjacent holding brackets are provided. In the invention, the gist is to support both ends in the longitudinal direction of the tread.

According to a fourth aspect of the present invention, in the tread support structure for a temporary scaffold according to any one of the first to third aspects, the invention is rotatably attached to a scaffold frame of the temporary scaffold. The gist of the present invention is to provide a support bracket for holding the holding bracket in at least one of the substantially horizontal position and the retracted position.

According to a fifth aspect of the present invention, in the tread supporting structure for a temporary scaffold according to any one of the first to fourth aspects, the retracted position is a standing position, and is substantially horizontal from the standing position. The gist of the present invention is to provide a regulation means for regulating the movement of the tread in the direction of the position.

According to a sixth aspect of the present invention, in the stepping board support structure of the temporary scaffold according to the fifth aspect, the restricting means comprises a base end portion of the holding bracket with respect to a wedge member connecting the holding bracket to the scaffold frame. The gist of the present invention is to restrict the movement of the tread plate by causing the interference.

According to a seventh aspect of the present invention, in the stepping plate support structure of the temporary scaffold according to the fifth or sixth aspect, the restricting means includes a holding bracket and a wedge member for connecting the supporting bracket to the scaffold frame. Therefore, the movement of the tread is restricted by interfering the base ends of the two brackets.

According to an eighth aspect of the present invention, in the tread support structure for a temporary scaffold according to any one of the fourth to seventh aspects, the rotation axis of the holding bracket and the rotation axis of the support bracket are different from each other. Are on the same straight line.

According to a ninth aspect of the present invention, a step board is supported on a scaffold frame by the step board supporting structure according to any one of the first to eighth aspects.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. Note that “left” and “right” in the following description correspond to “up” and “down” in FIG. “Front” and “rear” correspond to “right” and “left” in FIG.

FIG. 1 shows a tread support structure according to this embodiment.
As shown in (1), a tread plate 12 is supported on a pillar 11 constituting a scaffold frame of a temporary scaffold. This tread support structure
It has a wedge member 13 directly attached to a connection frame 11 a provided on the outer peripheral surface of the support column 11, and two brackets (a support bracket 14 and a holding bracket 15) supported by the wedge member 13.

FIG. 4 is a perspective view showing the wedge member 13. As shown in the figure, the wedge member 13 has a wedge 16 fitted into the connection frame 11a.
Is provided with a rotation support portion 17 at the base end thereof. The rotation support portion 17 has a mounting plate 18 fixed to the wedge 16 and a pair of left and right side plates 19 extending from the mounting plate 18, and an insertion hole 19 a is formed in each side plate 19. . These insertion holes 19a are located coaxially, and a support pin 20 (see FIG. 1) composed of a bolt and a nut is inserted and supported in both insertion holes 19a. Further, a stopper 21 is provided under the side plate 19 between the side plates 19. In addition, this wedge member 13
The mounting plate 18 and the stopper 21 constitute a restricting means for restricting the rotation of the support bracket 14 and the holding bracket 15 in the upright position.

FIG. 5 is a perspective view showing the support bracket 14. As shown in the figure, the support bracket 14 includes a support arm 22 and a substantially rectangular mounting plate 23 which is welded and fixed below the center of the support arm 22. At the base end of the support arm 22, a pair of left and right long holes 24 (only the right long hole 24 is shown in FIG. 5) is provided so as to extend in the longitudinal direction of the support arm 22. The support arm 22
A rotation permissible portion 22a is formed diagonally in the upper portion of the base end. In addition, the lower part of the mounting plate 23
(See FIG. 1B). A projecting piece 26 is provided to connect the supporting member 22 to a lower portion of the support arm 22 near the base end.
A protruding piece 28 for connecting (see FIG. 1B) is provided. As shown in FIG. 1A, the support bracket 14 is rotatably supported by the support pin 20 via a long hole 24 of a support arm 22. At this time, the base end of the support arm 22 is located between the side plates 19.

FIG. 6 is a perspective view showing the holding bracket 15. As shown in the figure, the holding bracket 15 includes a main body 31 having a pair of tread holding hooks 30 provided on the distal end side and a pair of tread holding claws 30 formed at the base end, and a base end of the main body 31. L-shaped mounting part 32 joined to the
Consists of The stepping plate holding hook 30 is configured to be bendable at an intermediate portion by a pin 30a including a bolt and a nut, and to be unable to be bent by tightening the bolt and the nut. Also, the mounting part 3
An elongate hole 34 is provided at the base end of 2, and a rotation permitting portion 32 a is formed in an R-shape above the base end of the mounting portion 32. Figure 1
As shown in the figure, the holding bracket 15 is rotatably supported by the protruding end of the support pin 20 via the elongated hole 34.

As shown in FIG. 1B, the brace 25 has a protruding piece 2 of the support bracket 14 at one end thereof.
6 is rotatably connected. The free ends of the braces 25 are formed in a shape capable of engaging with the outer peripheral surface of the column 11. In the middle of the bracing 25, there is a projection 35, and this projection 3
A suspension member 27 is provided between the support bracket 5 and the projection 28 of the support bracket 14. The suspension member 27 is configured such that it can be bent at an intermediate portion by a pin 27a including a bolt and a nut, and cannot be bent by tightening the bolt and the nut.

On the other hand, as shown in FIG. 7, the tread plate 12 has an elongated rectangular tread body 37, and a pair of locking claws 38 projecting left and right from the tread body 37 are provided on the tread body 37. There are two sets. The tip of the hook 38 is
It is formed in a hook-like shape that can be hooked on the support arm 22.

Next, the operation of the tread support structure configured as described above will be described. When the work is performed using the tread plate 12 as a scaffold, as shown in FIG. 1, the tread plate 12 is supported by the column 11 in a state of being extended substantially horizontally. In this case, first, the wedge 16 is fitted into the connection frame 11a of the support 11.
Then, with the support bracket 14 and the holding bracket 15 being substantially horizontal, the free end of the brace 25 is applied to the outer peripheral surface of the column 11, and then the pin 27a is tightened so that the suspension member 27 cannot be bent. As a result, the support bracket 14 and the holding bracket 15 are supported by the column 11 substantially horizontally in a cantilever state. At this time, the base end of the support bracket 14 and the base end of the holding bracket 15 abut on the mounting plate 18 of the wedge member 13 and are regulated, so that the support in the long holes 24, 34 of both brackets 14, 15 is performed. The positions of the pins 20 are both on the base end side. The holding bracket 15 is placed on the placing plate 23 of the support bracket 14.

Subsequently, the left end portion of the tread plate 12 is inserted into the tread plate insertion portion 29 of the holding bracket 15 to dispose the tread plate 12 on the main body 31 of the holding bracket 15, and a pair of hooks on the left side of the tread plate 12. Set the pawl 38 to the support arm 2
Hang on 2. At the same time, the right end of the tread plate 12 is supported by a support bracket (not shown) and a holding bracket (not shown) supported by a column (not shown) adjacent to the right side of the column 11 as described above. Let it. Next, the hook 30 for holding the tread plate is rotated to engage the tip with the upper surface of the tread plate 12, and then the pin 30a is tightened to fix the hook 30. As a result, the tread 12
Are supported by the column 11 substantially horizontally while being supported by the holding bracket 15 in the holding state.

When the protruding tread plate 12 hinders the loading and unloading of materials, as shown in FIG. 3, it is placed in a substantially vertical state along the column 11, that is, in a standing position (retracted position). The tread plate 12 is supported by the column 11 in a state of being flipped up. In this case, first, the front end side of the substantially horizontally supported tread plate 12 (see FIG. 1) is lifted, and the tread plate 12 is rotated upward together with the holding bracket 15 around the support pin 20 as a fulcrum. Then, the tread plate 12 is erected as shown in FIG. At this time, the contact between the base end of the holding bracket 15 and the mounting plate 18 of the wedge member 13 is released. Moves relative to each other. That is, the tread plate 12 and the holding bracket 15
Will be dropped downward by the length of the elongated hole 34 after being flipped up to the standing position. As a result, the holding bracket 15 interferes with the mounting plate 18 at the base end, and is prevented from rotating in the front-rear direction.

When the support bracket 14 is flipped up following the flip-up of the tread plate 12, the pin 27a of the suspension member 27 is first released so that the suspension member 27 is freely bent. Then, the distal end side is lifted, and the support bracket 14 is rotated upward with the support pin 20 as a fulcrum,
It is raised as shown in FIG. At this time, the contact between the base end of the support bracket 14 and the mounting plate 18 is released, so that the weight of the support bracket 14 moves the support pin 20 in the elongated hole 24 in the distal direction. That is, after the support bracket 14 is flipped up to the standing position,
It will be dropped down by the length of four. Further, since the base end of the support bracket 14 is dropped into the gap between the mounting plate 18 and the stopper 21, the support bracket 14 interferes with both the mounting plate 18 and the stopper 21 at the base end, and as a result, in the front-back direction. Is prevented from rotating. Further, in a state where the support bracket 14 is prevented from rotating in the upright position, the mounting plate 23 sandwiches the tread plate 12 and the holding bracket 15 in the upright position between the support plate 11 and the support plate 14. Rotation of the bracket 15 in the front-rear direction is also prevented.

When returning the tread plate 12 from the standing position to the substantially horizontal position, first, the support bracket 14 is lifted upward so that the support pin 20 moves relative to the base end in the elongated hole 24, and the mounting plate 18 and the stopper 21 The base end of the support bracket 14 is pulled out from between. In this state, the support bracket 14 is rotated forward, and the free end of the brace 25 is applied to the outer peripheral surface of the column 11 in a substantially horizontal position, and then the pin 27a is tightened to make the suspension member 27 unbendable. Subsequently, the tread plate 12 and the holding bracket 15 are lifted together so that the support pins 20 relatively move in the elongated hole 34 in the proximal direction. Then, in this state, the tread plate 12 and the holding bracket 15 are mounted on the mounting plate 23 of the support bracket 14 which is supported substantially horizontally by being rotated forward. As a result, the tread plate 12 returns from the standing position to the substantially horizontal position, and is supported by the column 11 in a substantially horizontal state.

According to the above-described embodiment, the following effects are exhibited. (1) According to the tread support structure, the tread 12 having the tread main body 37 provided with the hooking claw 38, that is, a general-purpose tread can be used. Conventionally, a special tread plate had to be prepared, but in the present embodiment, it is not necessary and the cost is advantageous.

(2) Since the holding bracket 15 is provided with the tread holding portion 29 at the base end and the tread holding hook 30 at the distal end, the tread 12 can be reliably held at the two points. Therefore, the movement of the tread plate 12 in the front-rear direction can be suppressed.

(3) Regulation means (mounting plate 18, stopper 2
1), the support bracket 14 and the holding bracket 1
5 can be stably held at the upright position, so that the tread plate 12 supported by the holding bracket 15 can be stably held at the upright position.

(4) The brackets 14 and 15 are moved up and down in the upright position, so that the support pins 20 are elongated.
The rotation of the tread plate 12 and each of the brackets 14 and 15 can be restricted by a simple operation of relative movement in the inside 4.

(5) When the brackets 14 and 15 are supported by the column 11 substantially horizontally, the positions of the support pins 20 in the elongated holes 24 and 34 of the brackets 14 and 15 are both on the base end side. Therefore, when the support pin 20 is flipped up to the standing position, the support pin 20 can be relatively moved in the distal direction in the elongated holes 24, 34, and the brackets 14, 15 can be moved.
Can reliably interfere with the mounting plate 18.

The above embodiment can be modified as follows. The main body 31 of the holding bracket 15 in the above-described embodiment has the tread holding portion 29 on the base end side and the tread holding hook 30 on the front end side, but both the front end side and the base end side have the tread holding portion 29. Alternatively, a hook 30 for holding the tread plate may be used. Further, a tread plate holding hook 30 may be provided on the base end side, and a tread plate holding portion 29 may be provided on the distal end side.

In the above embodiment, the restricting means for restricting the movement of the support bracket 14 from the standing position to the substantially horizontal position is constituted by the mounting plate 18 and the stopper 21.
The stopper 21 may be omitted. Even with such a configuration, the movement of the support bracket 14 from the standing position to the substantially horizontal position can be restricted only by the mounting plate 18.

The mounting plate 23 of the support bracket 14 may be omitted. Even in this case, the holding bracket 15 can be held at a substantially horizontal position via the tread plate 12 by hooking the locking claw 38 of the tread plate 12 to the support arm 22.

In the above embodiment, the support bracket 1
The support pin 20 serving as a fulcrum for rotation of the holding bracket 4 is
5, the holding bracket 1 is separate from the support pin 20 which is the fulcrum of the rotation of the support bracket 14.
A support shaft serving as a fulcrum of the rotation of 5 may be provided on the outer surface of both side plates 19. In this case, the axis of the support shaft and the axis of the support pin 20 need not coincide.

When the tread plate 12 is flipped up to a standing position or returned to a substantially horizontal position, the support bracket 14 and the holding bracket 15 may be simultaneously rotated. Since the support pin 20 is not only a fulcrum of rotation of the support bracket 14 but also a fulcrum of rotation of the holding bracket 15, both brackets 14 and 15 can be operated at the same time. In this case, it is possible to reduce the trouble when the tread plate 12 is flipped up to the standing position or returned to the substantially horizontal position.

In the above-described embodiment, the tread plate 12 is raised to the upright position and retracted. However, the tread plate 12 may be retracted by hanging down. The support arm 22 of the support bracket 14 and the main body 31 of the holding bracket 15 may be configured to be extendable and contractible.
In this case, the length of the support arm 22 and the
By adjusting the width to the width of 2, it is possible to easily cope with various treads 12 having different widths.

Next, technical ideas that can be grasped from the above embodiment will be described below. The support bracket has a mounting plate for mounting and supporting the holding bracket at a substantially horizontal position, and the mounting plate locks and holds the holding bracket at the retracted position at the retracted position. The tread support structure for a temporary scaffold according to claim 4. With such a configuration, the holding of the holding bracket at the substantially horizontal position and the retracted position can be easily realized.

[0039]

Since the present invention is configured as described above, it has the following effects. According to the first aspect of the present invention, a general-purpose tread can be used, which is advantageous in cost.

According to the invention described in claim 2, according to claim 1,
In addition to the effects of the invention described in (1), the tread can be supported in a stable state. According to the third aspect of the invention, in addition to the effects of the first or second aspect of the invention, even a long tread can be easily supported.

According to the invention described in claim 4, according to claim 1,
In addition to the effects of the invention according to any one of the third to third aspects, the tread plate can be more stably supported at the substantially horizontal position and the retracted position.

According to the invention described in claim 5, claim 1 is provided.
In addition to the effects of the invention described in any one of the fourth to fourth aspects, the movement of the tread plate in the direction from the standing position to the substantially horizontal position can be restricted.

According to the invention described in claim 6, according to claim 5,
In addition to the effects of the invention described in (1), the regulation of the movement of the tread can be easily realized. According to the invention described in claim 7, in addition to the effects of the invention described in claim 5 or 6,
Regulation of the movement of the tread can be easily and reliably realized.

According to the invention described in claim 8, according to claim 4,
In addition to the effects of the invention described in any one of (7) to (7), the holding bracket and the support bracket can be simultaneously operated.

According to the ninth aspect of the present invention, the same effect as the effect of the invention according to any one of the first to eighth aspects is exerted on a temporary scaffold in which a tread is supported on a scaffold frame. be able to.

[Brief description of the drawings]

FIG. 1A is a plan view showing an embodiment of a tread support structure on a temporary scaffold, and FIG. 1B is a side view thereof.

FIG. 2 is a side view showing a state in which a tread plate and a holding bracket are flipped up to a standing position.

FIG. 3 is a side view showing a state where the support bracket is further raised to a standing position.

FIG. 4 is a perspective view showing a wedge member.

FIG. 5 is a perspective view showing a support bracket.

FIG. 6 is a perspective view showing a holding bracket.

FIG. 7 is a perspective view showing a tread plate.

[Description of Signs] 11 ... Prop that constitutes a scaffold frame of temporary scaffold, 12 ... Tread board,
Reference numeral 13: wedge member, 14: support bracket, 15: clamping bracket, 18: mounting plate constituting a restricting means, 21 ...
Stopper constituting the regulating means, 23 ... Placement plate.

Claims (9)

[Claims] 1. A tread support structure for supporting a tread on a scaffold frame of a temporary scaffold, wherein a holding bracket is rotatably attached to the scaffold frame, and the tread is supported by the bracket in a holding state. A tread support structure for a temporary scaffold, wherein the tread is displaced between a substantially horizontal position and a retracted position based on a rotation operation of the bracket. 2. The holding bracket is rotatably supported in a cantilevered state with respect to a scaffold frame, and restricts movement of a tread plate in a lateral direction at two points on a base end side and a tip end side thereof. The tread support structure for a temporary scaffold according to claim 1, wherein: 3. The holding bracket according to claim 1, wherein a plurality of the holding brackets are attached to the scaffold frame, and two adjacent holding brackets support both ends in the longitudinal direction of the tread plate. Treadboard support structure on a temporary scaffold. 4. A supporting bracket which is rotatably attached to a scaffold frame of a temporary scaffold and holds the holding bracket in at least one of a substantially horizontal position and a retracted position. The tread support structure in the temporary scaffold according to any one of claims 1 to 3. 5. The apparatus according to claim 1, wherein the retracted position is an upright position, and a regulating means is provided for regulating the movement of the tread plate in a direction substantially horizontal from the upright position. A tread support structure for a temporary scaffold according to any one of the preceding claims. 6. The control device according to claim 5, wherein the restricting means restricts the movement of the tread by causing a base end of the holding bracket to interfere with a wedge member connecting the holding bracket to the scaffold frame. Footboard support structure for temporary scaffolding. 7. The system according to claim 5, wherein the restricting means restricts the movement of the tread by causing the base ends of both brackets to interfere with a wedge member connecting the holding bracket and the support bracket to the scaffold frame. Or the tread support structure in the temporary scaffold according to claim 6. 8. The tread on a temporary scaffold according to claim 4, wherein a rotation axis of the holding bracket and a rotation axis of the support bracket are on the same straight line. Support structure. 9. A temporary scaffold, wherein a tread is supported by a scaffold frame by the tread support structure according to claim 1. Description: