JP2536075Y2 - Safety net suspension device for construction - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for suspending construction safety nets, for example, in the construction of a multi-story steel structure building, the floor panel of each floor after the assembly of the building frame is completed. The present invention relates to a device used for suspending a peripheral portion of a construction safety net extending downstairs to a beam, a column, or the like of the skeleton when performing an installation work.

[0002]

2. Description of the Related Art When suspending a safety net of this type, conventionally, a chain having hooks at both ends is used as a means for suspending the net, and one end of the chain is connected to a building frame made of a shape steel. Wrapped around a horizontal member such as a beam,
The one end hook was engaged and fixed to the chain link, and the peripheral rope of the safety net was hooked on the other end hook of the chain. It takes a lot of time and effort to attach and remove the chain, and even though it can be attached to a horizontal member such as a beam, it cannot be attached to a vertical member such as a pillar.

Therefore, the present invention can easily and easily attach not only to horizontal members such as beams of the building frame but also to vertical members such as pillars and diagonal members, etc. It is an object of the present invention to provide a construction safety net suspension device capable of always positioning a hook in a predetermined hanging posture.

[0004]

According to the present invention, there is provided a suspension device for safety net for construction work, wherein a clamp bolt is screwed through one of two opposing legs of a U-shaped member to form a connecting portion for connecting the legs. On the outside, the base of the hook for hanging the net,
It is characterized by being rotatably mounted around an axis perpendicular to the connecting portion.

[0005]

Embodiments will be described with reference to the drawings.
FIG. 1 is a side view of the construction safety net hanging device 1 according to the present invention, and FIG. 2 is a perspective view of the device 1 in a partially exploded state. The hanging device 1 has a U-shaped member 2 formed by press-forming a steel plate. The U-shaped member 2 connects a pair of opposing legs 3 and 4 and the legs 3 and 4. And a connecting portion 5.

The two leg portions 3 and 4 and the connecting portion 5 of the U-shaped member 2 have screw holes 6, 7, 7, which penetrate the respective central portions in the thickness direction (directions orthogonal to the respective portions 3, 4, 5).
A clamp bolt 9 is screwed through a screw hole 6 of one leg 3 of the two legs 3 and 4, and a ring of a hook 10 for hanging a net is inserted into the screw hole 8 of the connecting portion 5. Mounting bolt 12 for rotatably mounting the base 11
Is screwed. A disc spring 13 is attached to the tip of the clamp bolt 9 and is prevented from coming off by a split ring 14. Reference numeral 15 denotes a pot-shaped cover fitted to the outer surface of the ring-shaped base 11, and has a bolt insertion hole 15a.

As shown in FIG. 2, the hook mounting bolt 12 is formed over a required length from the inner end face of the bolt head to cover the cover 15 and the hook 10.
The ring-shaped base 11 has a cylindrical shaft portion 12a that can be fitted to the outside, and the distal end portion of the cylindrical shaft portion 12a has a smaller diameter than the shaft portion 12a and the screw hole 8 and the screw hole 7 on the leg 4 side. A screw shaft portion 12b that can be screwed is protruded coaxially and integrally. The lever mounting bolt 12 is connected to the cylindrical shaft 12.
a cover 15 and the ring-shaped base 11 of the hook 10
By screwing and tightening the screw shaft portion 12b into the screw hole 8 in a state in which is fitted to the outside, the screw shaft portion 12b is attached to the connecting portion 5 of the U-shaped member 2. At this time, the position of the distal end of the cylindrical shaft portion 12a is regulated by contacting the outer surface of the connecting portion 5, and the ring-shaped base portion 11 of the net hanging hook 10 is fitted to the cover 15 fitted to the outer surface. Together with the cylindrical shaft portion 12a
It is in a state where it is rotatable 360 degrees above.

As shown in FIG. 2, the hook 10 for hanging the net is formed by folding a thick metal linear material such as a number line into two parts and forming the whole into a substantially U-shape. The ring-shaped base 11 is bent inward, and the opposite ends are each formed into a semicircular shape and symmetrically abutted to form a ring-shaped base 11. I cover it.

In FIGS. 1 and 2, a hook 1 for hanging a net is shown.
0 is attached to the connecting portion 5 side of the U-shaped member 2. The hook 10 for hanging the net is connected to the leg 4 on the side facing the leg 3 on which the clamp bolt 9 is mounted. ,
The mounting can be performed in exactly the same manner as mounting on the connecting portion 5 using the screw holes 7. That is, the hook 10 for hanging the net can be arbitrarily attached to the connecting portion 5 and the leg 4.

The hanging device 1 having the above-described configuration.
In the case where the construction safety net N is suspended from the frame of the steel structure building under construction by using a large number of pieces, the mounting portion of the suspension device 1 is made of a horizontal H-shaped steel as shown in FIG. If the beam 16 is used, the side plate portion 16 of the beam 16
a, the two leg portions 3 and 4 of the U-shaped member 2 of the hanging device 1 are fitted in a state where the legs 3 and 4 are vertically opposed to each other, and the clamp bolt 9 is tightened. The suspension device 1 is fixed to the beam member 16 by being sandwiched between the legs 13 and the leg portions 4. In this state, the hook 10 for hanging the net is brought into a rope-holding position as shown in FIG. Perimeter rope R of safety net N
Should be hooked.

[0011] Further, as shown in FIG. 4, when the suspension device 1 is attached to a column 17 made of H-shaped steel, the two leg portions of the U-shaped member 2 are provided with respect to the side plate 17 a of the column 17. 3,4
With the clamp bolts 9 facing each other.
, The suspension device 1 is fixed to the pillar 17 in the same manner as described above. Net hanging hook 1
Since 0 is freely rotatable, it is possible to easily take the rope-holding position as shown in the figure. In this case, if the hook mounting bolts 12 are at the horizontal position, the net hanging hooks 10 can be rotated by their own weight and naturally take a rope-holding posture.

The hanging device 1 is not limited to a horizontal member such as a beam member 16 shown in FIG. 3 or a vertical member such as a column member 17 shown in FIG. It is possible to attach the same to a diagonal material such as a reinforcing material to be used in the same manner as described above, and the net suspension hook 10 can be positioned in a predetermined rope hanging posture.

Further, when the hook 10 for hanging the net is replaced from the connecting portion 5 of the U-shaped member 2 to the leg 4 on the side opposite to the leg 3 on which the clamp bolt is mounted, for example, an upward H-shaped steel The U-shaped member 2 is attached to a side plate portion of a beam member (which is a position where the beam member 16 shown in FIG. 3 is rotated by 90 degrees).
With both legs 3, 4 facing each other back and forth,
Can be installed.

In this embodiment, the disc spring 13 is attached to the tip of the clamp bolt 9, but the spring 13 is omitted, and the tip of the clamp bolt 9 is pressed directly against the clamped surface. Is also good.

[0015]

According to the present invention, the construction safety net suspension device of the present invention includes a clamp bolt screwed through one of the opposed legs of the U-shaped member, and a net outside the connecting portion connecting the legs. Since the base of the hanging hook is rotatably mounted around an axis perpendicular to the connecting portion, it is only necessary to fit the U-shaped member to the cross member of the building frame during construction and tighten the clamp bolt. In addition to being easily and easily attached and fixed, the mounting portion of the suspension device is not limited to a horizontal member such as a beam member as in the conventional suspension means composed of a chain, but is a vertical member such as a column member or a reinforcing member. The net hanging hook can be positioned in a predetermined rope hanging posture.

When the hook for hanging the net is configured so as to be replaceably attached to the leg on the side opposite to the leg on which the clamp bolt is mounted and to the connecting portion, for example, an upward H-section steel may be used. It can be attached by fitting both legs of the U-shaped member into the side plate portion of the beam member in a state of facing the front and rear.

As described above, according to the construction safety net suspension device of the present invention, while the device can be easily and easily mounted in any direction, the net suspension hook always has a predetermined rope hanging posture. Therefore, the efficiency of attaching and removing the safety net can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a side view of a construction safety net suspension device according to the present invention.

FIG. 2 is a perspective view showing a state where a part of the suspension device is disassembled.

FIG. 3 is an explanatory view showing an example of use of the above suspending device.

FIG. 4 is an explanatory view similar to FIG. 3, showing another example of use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Safety net suspension device 2 U-shaped member 3 Leg 4 Leg 5 Connecting part 6 Screw hole 7 Screw hole 8 Screw hole 9 Clamp bolt 10 Net hanging hook 11 Net hanging hook base 12 Hook mounting bolt N Safety Net R Peripheral rope of safety net

Claims (2)

(57) [Scope of request for utility model registration] 1. A clamp bolt is screwed through one of two opposing legs of a U-shaped member, and a base of a hook for hanging a net is attached to the outside of a connecting portion connecting the two legs to the connecting portion. A safety net suspension device for construction that is rotatably mounted around orthogonal axes. 2. The safety net suspension for construction according to claim 1, wherein the hook for hanging the net is removably attached to the leg on the side opposite to the leg on which the clamp bolt is mounted, and the connecting portion. Lowering device.