JP2000240279A - Scaffolding board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lay a lot of scaffolding boards on ground in stable states and easily lay the scaffold extending in a curved state. SOLUTION: A scaffolding board 1 is provided with a male fitting part 5 and a female fitting part 6 for fitting it therein. The male fitting part 5 is provided with two front/rear engagement holes 11, 12, while the female fitting part 6 is provided with an elastic lock piece 14 and the elastic lock piece 14 defines an angle claw part 14a freely fitted to/detached from the engagement holes 11, 12. A clearance 9 is provided between the male fitting part 5 and a foot side 3b so that the scaffolding board 1 can be connected in a doglegged attitude in a plane view. The claw part 14a of the elastic lock piece 14 is selectively fitted to the two engagement holes 11, 12 so that the connecting state of the adjoining scaffolding boards 1 is held in both of a straightly aligned state and a doglegged aligned state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold used mainly in a state of being laid on the ground in series.

[0002]

2. Description of the Related Art In a foundation work of a building, a civil engineering work such as a ditch, or a tunnel work, a passage for people is secured on a soft or uneven ground, and a passage for a hand-operated single-wheeled vehicle is secured. In order to achieve this, a large number of scaffolding boards have been formed as a scaffold laid in series on the ground. 14 and 15 show a conventional scaffold 21.

FIG. 14 is a plan view, and FIG. 15 is XV-XV of FIG.
FIG. 3 is a cross-sectional view, in which the scaffold plate 21 includes a main body 22 formed of a metal plate such as a steel plate and having a rectangular shape in a plan view. Both longitudinal side edges of the main body 22 have an L-shaped cross section serving as reinforcement. 23 is bent. For this reason, the longitudinal side of the main body 22 has a U-shaped cross section as a whole.

A protrusion 24 having a hemispherical tip is welded to one end of one foot 23 and the other end of the other foot 23 so as to protrude from the end face of the main body 22. A semicircular concave member 25 is fixed to the other end of one foot 23 and one end of the other foot 23 of the main body 22 by welding.

[0005] When a large number of scaffolding plates 21 are sequentially laid on the ground while fitting the projections 24 of the adjacent scaffolding plates 21 and the recessed materials 25, one scaffolding plate 21 becomes one. An elongated scaffold connected in a plate shape is configured. The main body 22 has elongated reinforcing ribs 26 bulging at appropriate intervals.

[0006]

The conventional scaffolding plate 21
Has the advantage that one type can be connected in series,
Since the protrusion 24 and the concave member 25 are merely fitted together, a force for shifting the scaffold plate 21 in the longitudinal direction due to walking of a person or passage of a single-wheeled carrier acts, or a truck or the like moves in the vicinity. When running and vibrations act,
The engagement between the projection 24 and the concave member 25 is easily disengaged,
There was a problem of poor stability.

Further, the scaffold does not always extend in a straight line. For example, it is necessary to curve the scaffold as a whole in accordance with the curve of a tunnel or to lay the scaffold as a whole in a zigzag shape. However, since the conventional scaffolding plate 21 is set so that the projection 24 and the recessed material 25 are fitted tightly, the conventional scaffolding plate 21 is linear when a large number of scaffolding plates are connected in a single plate shape. Therefore, there is also a problem that it is difficult to lay a curved scaffold or a zigzag scaffold in a stable state.

[0008] It is an object of the present invention to provide a scaffold that solves these problems.

[0009]

A scaffold according to the present invention connects a main body having a rectangular shape in plan view laid on the ground or the like and two adjacent main bodies in series. For this purpose, there are provided fitting means provided at both ends of the main body, and engaging means for holding adjacent main bodies in a connected state.

[0010] The fitting means and the engaging means can be embodied in various ways. For example, the fitting means of the scaffold plate according to the invention of claim 2 comprises a male fitting portion and a female fitting portion, and the male and female fitting portions are formed such that the adjacent main bodies are linear in a plan view. There is provided a posture change permitting means for maintaining the fitted state in both the state of being arranged in a square and the state of being arranged in the shape of a letter. Further, the engaging means of the present invention comprises a movable engagement member which moves against elasticity in a direction orthogonal to a connection / separation direction of two adjacent main bodies, and a two adjacent main body. The movable engagement member comprises a fixed engagement portion which is disengaged by the movement against the elasticity when the connection and separation are performed.

[0011]

According to the present invention, the connection between adjacent scaffolding plates is maintained by the engagement means, so that the connection between the scaffolding plates can be established by human walking or running of a single-wheeled transport vehicle as in the prior art. It does not come off easily, so that the stability of the scaffold can be significantly improved. Further, according to the second aspect, even if the scaffolds composed of a large number of scaffolding plates are arranged in a curved state or a zigzag extending state in a plan view, each scaffolding board is connected to a single plate. Therefore, a scaffold that matches the situation at the construction site can be provided in a stable state.

As the engaging means, for example, a pin can be used. However, if a movable engaging member which moves against elasticity is used as in claim 3, the scaffold plates are connected or separated. Work can be done with one touch,
There is an advantage that the work of laying and removing the scaffold composed of a large number of scaffold boards can be easily performed.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

First Embodiment FIGS. 1 to 11 show a first embodiment. FIG. 1 is a perspective view of the two scaffolding plates 1 viewed from above with a separation therebetween, and FIG. 2 is turned upside down. FIG. 3 is a partially broken plan view, FIG. 4 is a sectional side view of a main part, FIG. 5 is a VV view of FIG. 4, FIG. 6 is a VI-VI view of FIG. 7 is a sectional view taken along the line VII-VII in FIG. 4, and FIGS. 8 to 10 are views showing the connection state.

The scaffold 1 has a rectangular main body 2 made of a metal plate in the same manner as in the prior art. The main body 2 has bent longitudinally shaped legs 3 on both side edges. . A reinforcing rib 4 is formed to protrude from the main body 2. Note that the foot 3
The body is not limited to being formed integrally by bending the main body 2, and a steel material having an L-shaped or C-shaped cross section or a hollow rectangular shape may be fixed by welding or the like.

One end of one foot 3 and the other end of the other foot 3 are each provided with a male fitting part 5, while the other end of the other foot 3 is connected to one end. A female fitting portion 6 is provided at one end of the foot portion 3. That is, a pair of male fitting portions 5 and female fitting portions 6 are provided at two diagonal positions among the four corner portions of the main body 2. Needless to say, the male and female fitting portions 5 and 6 are provided at diagonal positions of the main body 2 because only one type of scaffold plate 1 is used.
Is to be connected continuously.

For example, as can be easily understood from FIG.
The male fitting portion 5 is composed of a male member 7 formed in a U-shape with a metal plate and having a downwardly opening cross section. The male member 7 is partially extended from the end face of the main body 2 so that the foot portion 3 is formed. The male fitting part 5 is comprised by arrange | positioning inside. On the other hand, the female fitting portion 6 is formed by welding the inner plate 8 to the end of the foot 3. In other words, the end of the foot 3 is shared by the female fitting portion 6, and by inserting the male fitting portion 5 into the female fitting portion 6, the adjacent scaffold plates 1 are connected. Approximately one plate. The inner plate 8 and the male fitting portion 5 of the female fitting portion 6 also have a role of reinforcing the foot portion 3 of the main body 2, respectively.

The inner plate 8 is bent in a stepwise manner, and is set so that the inner plate 5a of the male fitting portion 5 is fitted almost exactly at the lower horizontal piece 8a. The lower ends of the ends of the both side plates 5a and 5b in the male fitting portion 5 are curved in an arc shape so that the insertion into the female fitting portion 6 is smooth.

The male member 7 constituting the male fitting portion 5 is welded to the lower surface of the main body 2. Further, as shown in FIG. 5, for example, the inner plate 7a of the male member 7 is
The outer plate 7b is separated from the lower horizontal piece 3a of the foot 3 as shown in FIG. For this reason, the outer plate 7a can be bent and deformed so that its lower end moves closer to the inner plate 7b.

For example, as shown in FIGS. 4 and 7, the inner surface 3b of the foot portion 3 of the main body 2 and the outer plate 5b of the male fitting portion 5 are provided.
Is set so that a gap (clearance) 9 of a certain dimension is left between them. A bent piece 10 is formed at the lower end of the outer plate 5b of the male fitting part 5 so as to be bent to the inner surface 3b of the foot 3. The bent piece 10 is not formed over the entire length of the male fitting part 5, but is provided only at a location near the base end of the male fitting part 5. Has the gap 9 between the foot 3 and the inner side surface 3b. This gap 9 forms an example of the posture change permitting means described in claim 2, whereby the adjacent scaffolding plates 1 maintain the state in which the male and female fitting portions 5 and 6 are fitted, and It is permissible to change the posture between the straightly extended posture and the U-shaped posture.

A first engaging hole 11 and a second engaging hole 12 are provided side by side on the inner plate 5a of the male fitting portion 5 along the longitudinal direction of the male fitting portion 5 (note that the first engaging hole 11 and the second engaging hole 12 are arranged side by side). , One or three or more engaging holes may be used). These engagement holes 11 and 12 form a part of the engagement means described in claim 1, and form an example of a fixed engagement portion described in claim 3.

The inner plate 8 constituting the female fitting portion 6 has an elongated hole 13 extending in the longitudinal direction thereof.
An elastic locking piece 14 made of an elastic plate such as a leaf spring is arranged on the inner surface of the movable member as an example of the movable engagement member according to the third aspect. The elastic locking piece 14 is fastened to the inner part of the inner plate 8 with a bolt 15 and a nut 16, and the nut 16 is fixed to the elastic locking piece 14 by welding in advance.

For example, as shown in FIG.
Is formed with a claw portion 14a that can be fitted into the engagement holes 11 and 12 of the male fitting portion 5. In addition, the elastic locking piece 14
It can be elastically deformed so as to escape to the outside of the female fitting portion 6 through the elongated hole 13 of the inner plate 8. Then, the elastic locking piece 14 escapes and rotates due to the movement of the male fitting portion 5 due to the guide action due to the claw portion 14a of the elastic locking piece 14 having a mountain shape (may be an arc shape) in plan view. When a certain amount of force is applied, the male and female fitting portions 5, 6 can be fitted and disengaged.

When the adjacent scaffolding plates 1 are connected such that their end faces abut each other, as shown in FIG. 8, a large number of scaffolding plates 1 are arranged in a straight line in plan view. Can be connected to In this state, as shown in FIG. 4, the claw portions 14 a of the elastic locking pieces 14 are fitted into the second engagement holes 12 located at the base side of the male fitting portion 5, and the scaffold plates 1 are connected to each other. Is maintained. Since the bent piece 10 of the male fitting part 5 can also be somewhat elastically deformed, even if the claw part 14a of the elastic locking piece 14 is fitted into the second engagement hole 12, the scaffold plate 1 may be slightly deformed. Is acceptable.

FIGS. 9 to 11 show a state in which the adjacent scaffold plates 1 are arranged in a rectangular shape in a plan view, thereby forming a scaffold extending in a curved state as a whole. In this state, adjacent scaffolding plates 1 have a gap at one foot 3 and abut at the other foot 3, and a V between the end faces of both scaffolding plates 1 in plan view. A character-shaped gap 17 is open. As shown in FIG. 9, at the place where the V-shaped gap 17 is largely open, the bent piece 10 of the male fitting part 5 is exposed on the scaffold plate 1 and the claw part 14 a of the elastic locking piece 14 is , And is fitted in the first engagement hole 11 located on the distal end side of the male fitting portion 5.

On the other hand, as shown in FIG.
Is closed, the claw portion 14a of the elastic locking piece 14 is fitted in the second engagement hole 12 of the male fitting portion 5, and the bent piece 10 of the male fitting portion 5 is elastically deformed. By doing so, the deviation of the posture of both scaffold plates 1 is allowed. When the male fitting portions 5 are fitted into the female fitting portions 6 and the claw portions 14a of the elastic locking pieces 14 are fitted into the engagement holes 11 and 12, The scaffold consisting of one scaffold plate 1 is held in a stable state as if it were composed of one plate.

When the elastic locking piece 14 made of a leaf spring is used as the movable engagement member as in the embodiment, there is an advantage that the structure is simplified because one member is sufficient. Further, if the nut 16 is fixed to the elastic locking piece 14 in advance, there is an advantage that the attachment becomes easy. Further, when the male and female fitting parts 5, 6 are provided with the engaging holes 11, 12 and the elastic locking pieces 14 as the engaging means, in other words, when the male and female fitting parts 5, 6 are shared by the constituent members of the engaging means. This has the advantage that the structure can be prevented from becoming complicated.

{Other Embodiments} FIG. 12 shows a second embodiment. In this embodiment, an elastic locking piece 14 is fastened to the inner surface of the male fitting portion 5, and the engagement hole 1 is formed in the female fitting portion 6.
1, 12 are provided. Further, in a state where the scaffold plate 1 is connected in a straight line, a bent piece 10 for preventing the scaffold plate 1 from rattling in the width direction is cut and raised.

FIG. 13 shows a third embodiment in which the male and female fitting portions 5, 6 are formed to be wide. Although omitted in the drawings, this embodiment also includes an engagement means.

{Others} The present invention can be embodied in various forms other than the above embodiment. For example, the engaging means is not limited to one using a leaf spring as in the embodiment, but may be one using another elastic means such as a coil spring. Further, the fixed engagement portion is not limited to the engagement hole, and may be a projection or the like. The fitting means may have any structure as long as it can integrate adjacent scaffold plates.

Further, the scaffold plate can be made of another material such as a wooden material. Further, in each of the above embodiments, the male and female fitting portions are provided on one type of scaffold plate, but only the male fitting portion is provided at both ends, and only the female fitting portion is provided at both ends. Two types may be prepared, and these may be alternately arranged and connected. Further, the male fitting portion may be configured to be detachable from the main body, and half of the male fitting portion may be fitted to the female fitting portion of the adjacent main body. A simple structure is also included in the claims.

The posture change permitting means for connecting the scaffold plates in a V-shape is not limited to providing a gap as in the embodiment, but may be, for example, a male fitting portion or a female type. The fitting portion may be configured to rotate horizontally.

[Brief description of the drawings]

FIG. 1 is a perspective view seen from above with two scaffolds separated.

FIG. 2 is an exploded perspective view in a state where a scaffold is turned upside down.

FIG. 3 is a partially broken plan view.

FIG. 4 is a side sectional view of a main part.

FIG. 5 is a VV view of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a plan view in a state where the scaffolds are connected in a straight line.

FIG. 9 is a partial plan view showing a state where the scaffolds are connected in a V-shape.

FIG. 10 is a partial plan view of a state where the scaffolds are connected in a V shape.

FIG. 11 is a plan view of a scaffold laid in a curved state.

FIG. 12 is a plan sectional view showing a second embodiment.

FIG. 13 is a plan sectional view showing a third embodiment.

FIG. 14 is a plan view of a conventional example.

15 is a sectional view taken along the line XV-XV in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scaffold board 2 Main body 3 Foot 5 Male fitting part 5a, 5b Side plate 6 Female fitting part 7 Male member 8 Inner plate 9 Gap 11, 12 Engagement hole as a row of fixed engagement part 14 Movable Elastic locking piece as an example of an engagement member

Claims (3)

[Claims] 1. A fitting provided at both ends of a main body having a rectangular shape in plan view laid on the ground or the like and two adjacent main bodies connected in series. A scaffold plate comprising: a joining means; and an engaging means for holding adjacent main bodies in a connected state. 2. The fitting means comprises a male fitting portion and a female fitting portion. These male and female fitting portions are arranged in a state where adjacent main bodies are arranged in a straight line in plan view. The scaffolding plate according to claim 1, further comprising a posture change permitting means for maintaining the fitted state in any of the state in which the scaffolds are arranged. 3. An engaging means comprising: a movable engaging member which moves against elasticity in a direction orthogonal to a connecting / separating direction of two adjacent main bodies; and a two adjacent main body. 3. The scaffold plate according to claim 1, wherein the movable engagement member comprises a fixed engagement portion which is disengaged by being moved against the elasticity when the movable engagement member is connected / separated. .