JP2001254512A - Scaffold board with lifting opening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scaffold board with a lifting opening for which the opening top plate can be locked/unlocked easily even from the upper side of the scaffold board. SOLUTION: An opening top plate lock device 16 is equipped with a vertical shaft portion 21 which is supported in a freely rotating manner around a vertical shaft by an opening edge portion and is stuck out at the up and down end portions, a linking portion 22 moved to a lock position blocking the upward rotation of an opening top plate 15 in response to the rotation of the vertical shaft 21 fixed to the upper end portion of the vertical shaft portion 21, a linking portion 22 moved to an unlock position permitting the rotation, a handle portion 24 fixed to the lower end portion of the vertical shaft portion 21, and an elastic member 27 exerting the vertical shaft portion 21 downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold plate provided on a hypothetical scaffold at a construction site, an assembling workbench, and the like, and more particularly to a scaffold plate with a lifting opening using a lifting opening.

[0002]

2. Description of the Related Art An elevating opening is provided as a scaffold plate with an elevating opening, and an opening / closing top plate is swingably attached to one of the opposing edges, and the opening / closing top is attached to the other edge. 2. Description of the Related Art A device provided with an opening / closing top plate locking device for preventing a plate from opening is conventionally known.

In a conventional scaffold plate with an opening for lifting, an opening stopper is attached to the lower surface of the scaffold plate, and a through hole is provided in the openable top plate so that the opening stopper can be operated from above the scaffold plate. Both ascending and descending are made possible through the elevating opening.

[0004]

In the above-described conventional scaffolding plate with an opening for elevating, it is relatively easy to operate the opening stopper below the scaffolding plate, but to operate the hand above the scaffolding plate. Must be inserted from the through hole to operate the opening stopper on the lower surface side of the scaffold plate, and there is a problem that the operation of the opening stopper is troublesome.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a scaffolding plate with an opening for raising and lowering, which makes it easy to lock and unlock the top plate even from above the scaffolding plate.

[0006]

A scaffold plate with an opening for raising and lowering according to the present invention is provided with an opening for raising and lowering, and an openable and closable top plate is swingably attached to one of the opposing edges. On the other hand, in a scaffolding plate with an opening for lifting which is provided with an opening / closing top plate locking device for stopping the opening and closing of the opening / closing top plate, the opening / closing top plate locking device is rotatable about a vertical axis at an opening edge. A vertical shaft portion that is supported and has upper and lower ends protruding, and a lock position that is fixed to the upper end portion of the vertical shaft portion and that prevents the upward and downward rotation of the openable top with the rotation of the vertical shaft portion, and It is characterized by comprising an engaging portion moved to an allowed unlock position and a handle fixed to the lower end of the vertical shaft portion.

According to the scaffold plate with the opening for lifting of the present invention, when descending from the top to the bottom of the scaffold plate, the engaging portion is held and moved to the unlock position, and the openable top plate is pulled up. Then, after descending through the elevating opening and closing the opening / closing top plate below the scaffold plate, the vertical shaft portion may be rotated with the handle portion to move the engaging portion to the lock position.
Also, when ascending the scaffold plate from below, rotate the vertical shaft with the handle to move the engaging part to the lock position, then lift the openable top plate upward, and lift After passing through the platform and closing the open / close top plate on the scaffold plate, the user may hold the engaging portion and move it to the lock position. Thus, locking and unlocking of the open / close top plate can be easily performed even from above the scaffold plate.

[0008] It is preferable that the opening / closing top plate locking device further includes an elastic member for urging the vertical shaft portion downward.
The elastic member is a coil spring, and is interposed between the opening edge and the handle, for example. This prevents the opening / closing top lock device from rattling against the opening edge,
A stable lock state is ensured.

The vertical shaft has a prismatic shape, and the engaging portion and the handle are formed in the same shape and are attached to the vertical shaft by a screw member. It is preferable that a recess is formed on the upper surface of the handle so that the vertical shaft is non-rotatably fitted. With this configuration, the opening / closing top plate locking device can have a simple configuration, which facilitates manufacture and assembly.

[0010] An upper protruding portion is provided at a rotating end of the opening / closing top plate, and an engaging recess is provided on a lower surface of the engaging portion so as to fit into the upper protruding portion when in the lock position. Is preferred. This prevents the engaging recess from easily moving to the unlock position. The inner surface shape of the engaging recess is formed in an arc shape so that the engaging recess slides with respect to the upper protruding portion of the opening / closing top plate when the rotating shaft is rotated by an external force. Preferably, this allows the engaging portion to be smoothly moved to the unlock position.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left and right in FIG.

FIG. 1 shows a scaffold (1) as an example in which a scaffold plate with an opening for elevating according to the present invention is used. The scaffold (1) is provided between a support (2) and a support (2). Stopped crossing
(3), a scaffold plate (4), an external support (5), and the like. The upper scaffold plate (4) called a cloth frame with a floor has an opening / closing top plate (15). A scaffold plate (4) with an opening for elevating is used.

As shown in FIG. 2, a scaffold plate with an opening for raising and lowering
(4) is a pair of left and right horizontal vertical members (11) (12) and horizontal vertical members (11)
(12) Front and rear fixed top plates fixed between (13) (14)
And an open / close top plate (15) disposed between the front and rear fixed top plates (13) and (14) and rotatably attached to the right horizontal vertical member (12) via a hinge (17). An opening / closing top plate locking device (16) provided on the left horizontal vertical member (11) to prevent the opening / closing top plate (15) from opening. Opening and closing top plate (15), as shown by the chain line in the figure,
When the scaffold plate (4) is pivoted upward, it provides an elevating opening (19) used when the scaffold plate (4) moves from below to above or from above to below. Left and right horizontal vertical members (1
1) At both ends of (12), hook devices (18) for attaching and detaching the scaffold plate (4) to the round pipe step (3) with one touch are provided.

As shown in FIGS. 3 to 5, the opening / closing top plate locking device (16) includes a left horizontal vertical member (11) (that is, an edge of the lifting opening (19)) around a vertical axis. A prismatic vertical shaft portion (21) rotatably supported and having upper and lower ends projecting from the horizontal vertical member (11), and a vertical shaft portion (21) provided at the upper end of the vertical shaft portion (21). ), An engaging portion (22) that is moved to a locked position for preventing the upward rotation of the open / close top plate (15) and an unlocking position for allowing the same, and a vertical shaft portion (21). The handle (24) provided at the lower end, the horizontal vertical member (11) and the engaging portion (2
(2), and a coil spring (elastic member) interposed between the horizontal vertical member (11) and the handle (24) to urge the handle (24) downward. ) (27).

The left horizontal vertical member (11) is a rectangular tube having a rectangular cross section.
(11a), a rising wall (11b) having an L-shaped cross section connected to the left edge of the upper wall of the rectangular tube portion (11a), and a horizontal wall provided at a lower portion of the right wall of the rectangular tube portion (11a). It consists of an overhanging wall (11c). Square tube (11
The upper and lower walls b) are provided with circular through holes (28) through which the vertical shaft portions (21) are rotatably inserted. Rising wall (1
1b) receives the openable top plate (15) rotated upward in the open position (see FIG. 2), and the horizontal overhanging wall (11c)
It receives the left and right ends of the fixed and openable top plates (13), (14), (15).

At the upper and lower portions of the vertical shaft portion (21), vertical female thread portions (21a) (21b) are formed, and the engaging portion (22) and the handle portion (24) penetrate these. The screw members (23) and (25) are fixed to the vertical shaft portion (21) by being screwed into these female screw portions (21a) and (21b).

As shown in FIG. 4, the engagement portion (22) has a plate-like shape, and when its longitudinal direction is directed to the left and right, the inner end thereof rotates the opening / closing top plate (15). A lock position that overlaps on the end and prevents upward movement of the openable top (15),
From this position, the opening / closing top plate (15) is turned to an unlock position that allows upward movement of the opening / closing top plate (15) when it is turned 90 ° around a vertical axis and its longitudinal direction is directed in the left-right direction.

The lower surface of the engaging portion (22) and the upper surface of the handle portion (24) have recesses (22a) and (24a) each having a rectangular cross section in which the vertical shaft portion (21) is non-rotatably fitted. , Horizontal vertical members when locked
(11) Recesses (22b) and (24b) having an arc-shaped cross section are provided in a portion located further inward than (11). Also, the engaging portion (22)
A plurality of rows of ridges are provided on the upper surface of the handle and on the lower surface of the handle portion (24) so as to prevent slippage when held by hand. These engagement part (22) and handle part (24) are made of extruded material,
The recesses (22a) (22b) (24a) are formed in the same shape
(24b) As if facing each other, the vertical shaft part (21)
Attached to.

As shown in FIG. 4 and FIG.
An inverted L-shaped member (29) is fixed to the left edge of (5), and an upper protruding portion (29a) is provided at a corner of the member (29). Arc-shaped recess (22b) in cross section of the engaging portion (22)
Is fitted to the upper protruding portion (29a). The upper surface of the upper wall of the rectangular tube portion (11a) of the horizontal vertical member (11) and the upper surface of the top plate (15) are flush with each other, and therefore, the inverted L-shaped member (2
The tip of the upper protruding portion (29a) of 9) is located above these upper surfaces. The washer (26) has a spacer function for setting the lower surface height of the engaging portion (22) to a position slightly lower than the tip of the upper protruding portion (29a).
The upper protruding portion (29a) has only the tip portion housed in the recess (22b). As shown in FIG. 5, when the handle portion (24) is pushed up, the elastic member (27) is compressed, and the tip of the upper protruding portion (29a) is completely removed from the recess (22b) of the engaging portion (22). Get out and become free.

According to the opening / closing top plate locking device (16) of the scaffold plate (4) with the opening for raising / lowering of the present invention, when descending from the top to the bottom of the scaffold plate (4), the engaging portion (22) is held. And move it to the unlocked position, pull up the openable top (15), lower it through the elevating opening (19), and under the scaffold (4), open the openable top (15). Then, the vertical axis (21) may be rotated by holding the handle (24) to move the engagement part (22) to the lock position. Since the inner surface of the concave portion (22b) of the engaging portion (22) fitted to the upper protruding portion (29a) of the opening / closing top plate (15) has an arc shape, when the engaging portion (22) is turned, The recess (22b) slides with respect to the upper protruding portion (29a) of the opening / closing top plate (15), and the engaging portion (22) can be smoothly moved to the unlock position.
The coil spring (27) has a vertical shaft (21) with respect to the horizontal vertical member (11).
Does not hinder the rotation of the engaging portion (22).

When ascending the scaffold plate (4) from below, hold the grip (24) and push it slightly upward to rotate the vertical shaft (21), After moving the joint (22) to the lock position, lift the opening / closing top plate (15) upward, go up through the elevating opening (19), and on the scaffold plate (4), open and close the top plate. After closing (15), it is sufficient to hold the engaging portion (22) and move it to the lock position. Thus, the locking and unlocking of the openable top plate (15) can be easily performed from above or below the scaffold plate (4).

In the above embodiment, the engagement portion
Although (22) and the handle portion (24) have the same shape, the shape of the handle portion may of course be different from that of the engaging portion (22). By forming the engaging portion (22) and the handle portion (24) in the same shape by using extruded profiles, the opening / closing top plate locking device is provided.
The production of the parts used in (16) becomes simple, and the work of assembling them becomes easy.

[Brief description of the drawings]

FIG. 1 is a front view showing a temporary scaffold as an example in which a scaffold plate with an opening for lifting according to the present invention is used.

FIG. 2 is a perspective view showing a scaffold plate with a lifting opening;

FIG. 3 is an exploded perspective view showing the opening and closing top plate locking device.

FIG. 4 is a vertical sectional view showing a state in which an openable top plate is closed.

FIG. 5 is a vertical sectional view showing an intermediate state when the openable top plate is opened.

[Explanation of symbols]

 (4) Scaffolding plate (15) Opening / closing top plate (16) Opening / closing top plate locking device (19) Elevating opening (21) Vertical shaft (22) Engagement part (22a) Shaft fitting recess (22b) Engage Recess (23) (25) Screw member (24) Handle (24a) Shaft fitting recess (27) Coil spring (elastic member) (29a) Upper protrusion

Claims (4)

[Claims] An opening / closing opening (19) is provided, and an opening / closing top plate (15) is swingably attached to one of the opposing edges, and the opening / closing top plate (15) is In a scaffolding plate with a lifting opening provided with an opening / closing top plate locking device (16) for stopping the opening, the opening / closing top plate locking device (16) is supported rotatably around a vertical axis at an opening edge and is vertically movable. A vertical shaft (21) having an end protruding; and a vertical shaft (2) fixed to the upper end of the vertical shaft (21).
An engaging portion (22) which is moved to a locked position for preventing the upward rotation of the open / close top plate (15) with the rotation of (1) and an unlocked position for permitting this, and a vertical shaft portion (21). A handle (24) fixed to the lower end of the scaffold. 2. An opening / closing top plate locking device (16) includes a vertical shaft portion (2).
2. The scaffold with an opening for lifting according to claim 1, further comprising an elastic member (27) for urging the 1) downward. 3. The screw member (23) is formed so that the vertical shaft portion (21) has a prismatic shape, and the engaging portion (22) and the handle portion (24) are formed in the same shape and face each other. (25) is attached to the vertical shaft portion (21), and the shaft portion is fitted into the lower surface of the engaging portion (22) and the upper surface of the handle portion (24) so as to non-rotatably fit the vertical shaft portion (21). 3. The scaffold with an opening for lifting according to claim 1, wherein the recesses (22a) and (24a) are formed. 4. An upwardly projecting portion is provided at a pivotal end of the opening and closing top plate (15).
(29a) is provided on the lower surface of the engaging portion (22), and the engaging recess fits with the upper projecting portion (29a) when in the lock position.
4. The scaffold plate with an opening for lifting according to claim 1, 2 or 3, wherein (22b) is provided.