JPH0446443Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a loading opening opening/closing device for opening and closing a loading opening provided inside a structure using a thin material.

[Background technology]

When lifting or unloading items above a building under construction, use the space outside the building.

However, in workplaces in urban areas, it is not possible to provide this space outside the building, so it is unavoidable to open a part of the space into the interior of the building under construction, and use this open space as an opening for unloading cargo. This opening is closed when unloading work is no longer necessary, but during unloading work a horizontal net is erected as a safety measure and can be opened and closed manually. When this opening is large, the horizontal net remains open even when unloading work is not being performed due to poor workability, resulting in insufficient safety.

The present invention takes the above facts into consideration and aims to provide a loading opening opening/closing device that can easily open and close the loading opening.

[Summary and operation of the device]

The unloading opening opening/closing device according to the present invention includes a pair of guide rails disposed along the edge of the opening to a lower part of the floor slab constituting the unloading opening, and a pair of guide rails that are slidably attached to the guide rails. a plurality of sliding bars that span the bridge; a foldable arm that connects the sliding bars and has a hinge structure at the connecting portion;
It is characterized by having a thin material attached to the arm and stretched to the opening as the arm moves, and a drive means for moving the sliding bar located outside along the guide rail. It is said that

In the unloading opening opening/closing device configured as described above, among the plurality of sliding rods slidably spanned over the guide rail, the sliding rod located on the outer side is moved by the driving means. This sliding bar is connected to another sliding bar by an arm that is rotatable by a hinge. Therefore, the other sliding members are also pulled by the sliding bars located outside and move along the guide rail. At this time, the thin material attached to the arm is stretched so as to cover the opening by the arm extending in the horizontal direction, thereby closing the opening. Further, by moving the sliding bar located outward in the opposite direction to the above, the opening is opened. In addition, when the thin material is opened, the thin material is gathered at the end of the guide rail so as to be folded by the arm, so that it does not sag.

[Example of idea]

As shown in FIGS. 1 and 2, an open-air opening 12 is formed in a building 10 (shaded area) under construction and serves as an opening for unloading cargo.

As shown in FIG. 4, this opening 12 has an enlarged diameter section 12A at the bottom, and inside this enlarged diameter section 12A are guide rails 14, 15 as shown in FIG.
are placed parallel to each other. These guide rails 14 and 15 extend along the longitudinal direction of the opening 12, and both ends are supported by brackets 16 to the building 10.

A plurality of rollers 18 are housed within these guide rails 14 and 15 and are movable in the longitudinal direction of the guide rails 14. These rollers 1
A ring 20 is pivotally supported at an axially intermediate portion of the guide rails 8, and a rod 22 is suspended from a part of the outer periphery of the ring 20 and protrudes from the lower end openings of the guide rails 14 and 15. These rings 20 are rotatable relative to the rollers 18, so that even when the rollers 18 move in the longitudinal direction of the guide rail 14, the rods 22 can move in parallel in the horizontal direction without rotating.

One end of a rectangular pipe 26 is fixed to the lower end of each of these rods 22 by a nut 24. Here, both ends of square pipes 28 having a smaller diameter than the square pipes 26 are inserted into the square pipes 26 suspended from the guide rails 14 and 15, and are fixed to the square pipes 26 with tightening bolts 30 and 32. There is.

The insertion amount of these rectangular pipes 26 and 28 can be changed depending on the dimensions of the opening 12.

Therefore, the square pipes 28 have openings 1 parallel to each other.
2, and the middle portion of a net 34 is attached between these pipes 28. This net 34 is connected to the square pipe 28 as shown in FIG.
When the rectangular pipes 28 are close to each other, they are bent, and when the rectangular pipes 28 are separated from each other, as shown in the left side of FIG.
2 is designed to close.

As shown in FIGS. 1 and 4, arms 36 and 38 are attached between the rectangular pipes 26 that are parallel to each other. These arms 36, 38 are rotatable relative to each other by a hinge 40, and
The other end portions are pivotally supported to the square pipe 26 by hinges 42, respectively. Therefore, multiple square pipes 2
6 and 28 are square pipes 26 and 28 arranged at the left end in FIG. It is designed to follow the movement.

A part of the endless chain 44 is attached to the rectangular pipe 26 disposed at the left end in FIG. These endless chains 44 are wound around sprocket foils 46 and 48 arranged at both longitudinal ends of the opening 12, respectively, and these sprocket foils 46 and 48 are fixed to support shafts 50 and 52. At the same time, these support shafts 50 and 52 are attached to a bracket 5 as shown in FIG.
4 to a bearing 58 that is supported to the building 10.

A sprocket wheel 62 is fixed to the support shaft 50 adjacent to the sprocket wheel 46, and a part of the endless chain 64 is wound around it.
The other part of the endless chain 64 is wound around a sprocket wheel 68 which is fixed to the output shaft of a motor 66 shown in FIG.

Therefore, the rotational force of the motor 66 is transmitted to the support shaft 50 via the endless chain 64, and the endless chain 44 thereby guides and moves the rectangular pipes 26, 28 along the guide rails 14, 15. There is.

In order to limit the amount of movement of the endless chain 44, a limit switch (not shown) is disposed at the longitudinal end of the opening 12.

Next, the operation of this embodiment will be explained.

FIG. 2 shows the rectangular pipes 26 and 28 gathered together at one end of the opening 12 in the longitudinal direction, and since the opening 12 is open, unloading operations can be carried out through this opening. I can do it.

When unloading work is not to be carried out, the motor 66 is driven and the leading square pipes 26 and 28 are moved to the other end of the opening 12 by the driving force of the endless chain 44. As a result, the first square pipes 26, 28 pull the second and subsequent square pipes 26, 28 via the arms 36, 38, so that the net 34 is stretched over the opening 12, and the net 34 is stretched across the opening 12.
2 is closed. Since the opening 12 is closed with the net 34 when unloading work is not performed, safety when working inside the building 10 is ensured.

When unloading work is to be carried out again, the motor 66 can be rotated in the opposite direction, and the leading square pipes 26, 2
8 applies compressive force to the second and subsequent rectangular pipes 26 and 28 to move them through the opening 1 as shown in FIG.
2, the opening 12 is opened again.

In the above embodiment, the square pipes 26, 2
8 is used to show the rod material over which the net 34 is hung, but the present invention is not limited to square pipes, and various types of pipes, wires, etc. can be used. Furthermore, the present invention is not limited to netting, but can also be applied to other thin materials such as transparent sheets to close the openings.

[Effect of idea]

As explained above, the unloading opening opening/closing device according to the present invention includes a pair of guide rails disposed along the edge of the opening to the lower part of the floor slab constituting the unloading opening, and a pair of guide rails disposed along the edge of the opening. A plurality of sliding bars that are slidably spanned, a foldable arm that connects the sliding bars and has a hinge structure at the connecting portion, and a foldable arm that is attached to the arm and that moves as the arm moves. and a drive means for moving the sliding bar located outside along the guide rail.
The loading opening can be easily opened and closed. In addition, when the opening is open, the net is folded without hanging down any more than necessary, so it does not hang down and does not get in the way.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an opening in a building showing an embodiment of the present invention, Fig. 2 is a plan view showing the opening, Fig. 3 is a sectional view taken along the line shown in Fig. It is a figure-line sectional view. 10... Building, 12... Opening, 26, 28...
...Square pipe, 34...net, 66...motor.

Claims (1)

[Scope of utility model registration request] a pair of guide rails disposed along the edge of the opening to the lower part of the floor slab that constitutes the unloading opening; a plurality of sliding bars that are slidably spanned over the guide rails; a foldable arm in which the sliding bars are connected to each other and the connecting portion has a hinge structure; a thin-walled member attached to the arm and stretched to the opening as the arm moves; A loading/unloading opening opening/closing device comprising: a drive means for moving the sliding bar located at the guide rail along a guide rail.