JPS6041390Y2 - Safety net tensioning device for construction sites - Google Patents

Description

[Detailed explanation of the invention] This invention is a safety net that is installed mainly on the exterior walls of wooden buildings to safely catch workers and materials falling from the roof or eaves. The present invention provides a construction site safety net tensioning device for use in construction sites.

An embodiment of the present invention will be described below based on the attached illustrative drawings. In Figs. 1 to 3, reference numeral 1 denotes a mounting member for fixing to a pillar 3 located on the outer wall of a wooden building 2. It is equipped with a clamping means 4 of.

5 is a beam-like member extending horizontally outward from the mounting member 1, and 6 is a support member extending vertically upward from the outer end of the beam-like member 5.

Reference numerals 7a and 7b indicate a plurality of safety net hooks (two in the example) attached to the beam-shaped member 5, and reference numerals 8a and 8b indicate safety net hooks attached to multiple locations (two in the embodiment) in the middle of the support member 6. The net hook 9 is a safety net hook attached to the upper end of the support member 6.

As shown in FIGS. 2 to 5, the mounting member 1 includes:
A square pipe part 10 is formed projecting on one side of the square pipe part 10, and the beam-like member 5 made of square pipe material is inserted into and inserted into the square pipe part 10 so as to be freely inserted and removed in the horizontal direction, and is fixed at any position. lla.

1b fixes the beam-like member 5 to the mounting member 1.

The fixing bolts lla and llb are screwed vertically through nuts 12a112b fixed to the outer side of the lower wall of the square pipe section 10, and disc springs 13a and 13b are attached to the tips that push up the beam-like member 5 for relative rotation. Can be installed freely.

47 is a leaf spring material that presses the beam member 5 to one side;
It is fixed to the inner surface of the outer wall of the square pipe part 10 along the length direction of the beam-like member 5 with a stopper 48, and has protruding stamp pressing parts 49a and 49b at both ends that press against the lateral side surface of the support member 5. have

When the beam-shaped member 5 is inserted into the square pipe section 10, the protrusion pressing parts 49a and 49b are pressed and elastically displaced, and the free ends 50a and 50b thereof come close to the inner surface of the square pipe part 10.

The beam-like member 5 supported in this manner
, 49b are compressed and the free ends 50a, 50b are slid on the inner surface of the square pipe section 10, while being able to swing in the left-right direction shown by the arrow 51.

On the other side of the mounting member 1, a fixed seat 14 constituting the clamping means 4 and a pair of upper and lower movable pressing plates 15 and 16 are provided.
A fixed plate 21 is provided, in which a nut 19.20 is fastened, through which the set screw 17.18 of the movable pressure plate 15.16 is screwed.

The fixed seat 14 and the fixed plate material 21 are fixed to both sides of the mounting member 1 over the top and bottom.
4 and the fixed plate material 21, a rubber plate 22 is attached to the surface of the mounting member 1, and a movable pressing plate 15.16 is attached to the tip of the set screw 17.18 so that only relative rotation is possible.
It has a rectangular shape and one side thereof slides on the rubber plate 22.

Reference numerals 23 and 24 denote rubber plates attached to the fixed seat 14 and the movable press plates 15 and 16.

As shown in FIGS. 6 and 7, a small diameter shaft portion 52 is formed at the tip of the set screw 17.18, and the movable press plate 15.1
An outwardly bulging portion 53 formed at the center of the small diameter shaft 52 is slidably and rotatably fitted loosely into the small diameter shaft 52, and the small diameter end contacts the base of the small diameter shaft 52 while the large diameter end contacts the base of the small diameter shaft 52. A disc spring 54 is loosely fitted onto the small diameter shaft portion 52 such that the portion abuts against the movable pressing plate 15,16.

Reference numeral 55 denotes a retaining protrusion formed at the end of the small diameter shaft portion 52.

Note that the bulging portion 53 is formed when the disc spring 54 is slightly compressed between the set screw 17.18 and the press plate 15.16.
The depth is such that the retaining protrusion 55 does not protrude from inside the bulge 53 .

As shown in FIGS. 2, 3, and 8 to 10, the hooks 7a%7b and 8a%8
b is a spring wire 26a that is continuous by the U-shaped portion 25;
, 26b are bent at right angles to one side through the loop portions 27a, 27b, and in the hook 7, the U-shaped portion 2
It is formed integrally with the circumferential end of a hook attachment spring member 28, 29 which is bent at a right angle to the side opposite to the side where the hook is located.

The hook attachment spring members 28, 29 are attached to the beam member 5 by the hooks 7a, 7b and 8a, 8b on both sides, with the U-shaped portion 25 in contact with the bottom surface of the beam member 5 and the outer surface of the support member 6. and the U-shaped portion 25 with the support member 6 sandwiched between them.
The spring wire rods 26a and 26b have two recessed grooves 30a and 30b into which the spring wires 26a and 26b are fitted, respectively, and are fixed by U-shaped holding plates 31 and 32 which are fitted into the beam member 5 and the column member 6.

The hook 9 is a spring wire 3 having a U-shaped portion 33 at one end.
4 is integrally formed at the end of a hook attachment spring material 36, which is formed by bending the hook 4 at right angles to one side through a loop portion 35.

This hook attachment spring member 36 is attached to the U-shaped presser plate 31 with its U-shaped portion 33 in contact with the outer surface of the support member 6 and with the hook 9 positioned directly above the upper end of the support member 6. It is fixed by a U-shaped holding plate 37 which is the same as that of 32.

Also, hook? a and 7b are in a horizontal state with their open portions facing the mounting member 1 side, and the hook 8a.

8b is in a horizontal position with its opening facing in the opposite direction to the openings of hooks 7a, 7b, and hook 9 is in a vertical position with its opening facing in the same direction as the openings of hooks 8a, 8b. It is in.

Like the hook 9, the hooks 8a and 8b may be in a vertical position.

As shown in FIGS. 11 to 13, on the upper surface near the tip of the beam-like member 5, there is a core column (square pipe) 3 for supporting the column member.
8 is vertically fixed, and a leaf spring material 40 having protruding pressing portions 39a139b on both upper and lower ends on the rear side surface of this core column 38.
When the central part of the support member 6 is attached via a U-shaped holding plate 41 and the lower end of the support member 6, which is made of square pipe material, is fitted onto the core column 38 and the leaf spring material 40, the protrusion of the leaf spring material 40 The pressing parts 39a and 39b are compressed by the inner surface of the support member 6,
The circumferential ends 42a and 42b of the leaf spring material 40 are configured to abut against the rear side surface of the core post 38.

By fitting the strut member 6 onto the core column 38 and the leaf spring material 40 in this way, the strut member 6 is elastically placed in a state in which it can swing in the front-rear direction shown by the arrow 43 when an external force of a certain level or more is applied. Retained.

Incidentally, when the support member 6 swings rearward, among the projecting pressing parts 39a and 39b of the leaf spring material 40, the lower projecting pressing part 39b is mainly compressed, and the free end 42b is pressed against the rear surface of the core column 38. rocking above.

Incidentally, even if the leaf spring material 40 is attached to the front side surface of the core column 38, the column member 6 can be elastically swung in the front-rear direction indicated by the arrow 43.

In this case, when the support member 6 swings rearward, the upper convex pressing portion 39a is mainly compressed.

In addition, by making the core post 38 thinner or making the support member 6 thicker, leaf spring materials 40 can be attached to both the front and rear sides of the core post 38, and leaf spring materials 40 can also be attached to at least one of the left and right sides. It is also possible to provide a configuration in which the support column member 6 can also be elastically swung in the left-right direction.

Of course, the cross-sectional shape of the support member 6 and the core column 38 may be circular, square, or any other arbitrary shape.

Next, the method of use will be described. As shown in FIG. 1, the device 44 of the present invention is attached to each company 3 located on the outer wall of the wooden building 2 so that the support member 6 protrudes above the eaves of the roof.

That is, as shown in FIGS. 2 to 5, the mounting member 1 is mounted on the pillar 3 at an appropriate height so that the pillar 3 is located between the fixed seat 14 of the clamping means 4 and the movable pressing plate 15,16. The movable press plate 15.16 is moved forward by rotating the set screw 17.1B, and the column 3 is sandwiched between it and the fixed seat 14 while the disc spring 54 is slightly compressed. wear it.

Next, after sliding the beam-like member 5 in accordance with the extension of the eaves, the plate spring 13a,
The beam-like member 5 is fixed to the mounting member 1 with the portion 13b being slightly compressed.

Then, the support member 6 is set on the tip of the beam member 5.

After the device 44 of the present invention is attached to each pillar 3 in this manner, a safety net 45 is stretched between adjacent devices 44 of the present invention.

That is, on both ends of the safety net 45 in the longitudinal direction, tabs are attached at appropriate intervals, and these tabs are attached to each of the hooks 7a, 8a19 or 7b, 8b, on the beam member 5 and the column member 6. 9, and the safety net 45 is stretched in a longitudinal cross-section shape.

By stretching the safety net 45 using the device 44 of the present invention as described above, even if a worker working on the roof accidentally falls down or materials fall, the safety net 45 can be stretched in a vertical cross-sectional shape. Uke can be stopped with the safety net 45.

At this time, a very large tension is applied to the safety net 45.The hooks 7a17b and 8a that hang the waist safety net 45
, 8b and 9 are hook mounting spring materials 28.29.36
Spring wire rods 27 protruding from each holding plate 31, 32, 37 of
a, 27b, 34 (loop parts 26a, 26b, 35
), and is elastically displaced in the direction pulled by the safety net 45, that is, diagonally downward as shown by the arrow 46 in FIGS. 2 and 3.

In addition, the beam member 5 can swing in the left-right direction against the elasticity of the plate spring material 47, and can also swing slightly downward against the elasticity of the disc spring 13a113b, so that the safety net If the impact acting on the mounting member 1 is very large, or if a falling object directly collides with the beam member 5 or the support column 6, the beam member 5 will move in the direction of the force with respect to the mounting member 1. It elastically deforms and cushions the impact.

If the safety net is stretched using the device of the present invention as in the above embodiment, the safety net will be stretched vertically in an abbreviated shape, and will surely catch falling objects from the roof or eaves, thereby causing personal injury. In particular, since an elastic material is inserted between the mounting member and the beam-like member to allow elastic displacement of the beam-like member, the safety net can prevent falling objects. The elastic displacement of the beam member relative to the mounting member can reduce the impact caused by falling objects or when a falling object directly collides with the beam member or support member. Situations such as damage, deformation or breakage of the beam-like members and support members can be avoided, and the product can be used safely for a long period of time.

Further, the impact on the pillar 3 is also reduced, and damage to the pillar 3 can be prevented.

In particular, as in the embodiment, an elastic material is interposed between the beam-like member and the support member to allow elastic displacement of the support member, and a hook for hanging a safety net is inserted between the beam-like member and the support member. To,
When an elastic material is interposed so that the hook can be elastically displaced by being pulled by the safety net, the falling object catcher has a greater cushioning effect when stopped as a whole, and can be used more safely. .

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing how the device of the present invention is installed, Fig. 2 is an enlarged front view of its main parts, Fig. 3 is a plan view of the same, and Fig. 4
The figure is a rear view showing the column clamp part, Figure 5 is a vertical cross-sectional view of the beam-shaped member fixing part, and Figure 6 is a vertical cross-sectional view of the main part of the clamping means.
Fig. 7 is a rear view of the same, Fig. 8 is a bottom view of the hook part in the beam-like member, Fig. 9 is an enlarged longitudinal cross-sectional view of the same, Fig. 10 is a side view of the hook part in the column member, and Fig. 11 is the column. FIG. 12 is a front view of the member attachment portion, FIG. 12 is a side view of the same, and FIG. 13 is a cross-sectional plan view of the member attachment portion. 1... Mounting member, 3... Pillar, 4...
... Clamping means, 5 ... Beam member, 3 ...
...Strut members, 7a, 7b, 8a, 8b, 9
・・・・・・Hook for hanging safety net, lla, llb
...Beam-like member fixing bolts, 13a, 13b, 5
4...Disc spring, 14...Fixed catch, 1
5, 16...Movable pressure plate, 17.18...
...Press screw, 28, 29, 36... Spring material for hook attachment, 31, 32, 37... Pressing plate, 38
・・・・・・Core pillar for supporting pillar members, 40, 47...
...Plate spring material, 44... Device of the present invention, 45...
...Safety net.

Claims (1)

[Scope of utility model registration request] A mounting member having a clamping means for fixing to a pillar of a building, a beam member extending horizontally outward from the mounting member, and a column member extending vertically upward from an outer end of the beam member. , comprising a hook for hanging a safety net attached to the beam-like member and the support member, and an elastic material that allows elastic displacement of the beam-like member is interposed between the attachment member and the beam-like member. A safety net tensioning device for construction sites.