JPH09112041A - Moving safety net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a special scaffold, and to facilitate the stretching work by providing a carrier, which can be moved in the longitudinal direction of each beam, on each beam of a roof, and connecting both the carriers, and stretching a net thereon. SOLUTION: A carrier 1 is placed on each beam 5 of a building. A connecting material 2 is placed on the carrier 1, and the carrier 1 and the connecting material 2 are fixed to each other. Divided nets 30 are arranged on the connecting materials 2 in the slope direction of the roof in order close to each other, and the nets 30 are fixed to the connecting materials 2 by a lock device. Assembly of a safety net Z is thereby completed. Bent plates 7 are provided on tight frames 6 in the condition that the safety net Z is positioned in a starting end side of the beam 5. Even in the case where a tool or the like is fallen from the beam 5, it can be received by a net 3. The safety net Z is moved by one pitch, and an engaging claw of the carrier 1 abuts on a next frame 6 so as to accurately move the safety net Z by one pitch. A scaffold for providing a net is thereby eliminated, and a net at a small area is effectively utilized, and the stretching work can be performed in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety net used for performing roofing work on a beam of a building, and more particularly, to a safety net which can be sequentially moved in the length direction of the beam during roofing work. It is related to a mobile safety net.

[0002]

2. Description of the Related Art For example, when a folded-plate roof is laid on a beam of a building, a safety net for preventing parts, tools and the like from dropping to the ground during work is installed.

[0003] Conventionally, this kind of safety net is stretched so as to cover a large area at a time before roofing work. That is, conventionally, a net having a predetermined large area is stretched under a beam with a rope or a fastener, but when the roof construction area is larger than one net area, several nets are used together. . When the roof construction area of one building is extremely large, the safety net may be extended several times at predetermined intervals. In that case, remove the net of the part where the roofing work was completed, and divert it to the next roofing work part.

[0004]

By the way, in this kind of conventional safety net, since it is installed under the beam, a scaffold for installing the net is required inside the building to be constructed. In order to cover a large area with a single-sided net, it is necessary to fix the net to a number of places such as pillars and beams, so that there is a problem that the net stretching work is troublesome and requires a long time for the stretching work. . In addition, when removing the net after the roofing work is completed, a scaffold is required, and the removal work is troublesome. In addition, if the net is sequentially divided into small areas according to the progress of the roofing work and then stretched, the replacement work of the net must be performed many times, and the roofing work during that time is interrupted. There is a problem of doing.

In view of the above-mentioned problems of the conventional safety net, the present invention makes it possible to eliminate the need for a special scaffold for installing the safety net, to perform the net installation work easily, and to transfer the net. It is an object of the present invention to provide a mobile safety net that can easily perform the operation.

[0006]

The present invention has the following structure as means for solving the above-mentioned problems. That is, the movable safety net of the present invention is provided with a plurality of carts movable in the length direction of each beam on a plurality of beams arranged at predetermined intervals in the gradient direction of the roof, while It is characterized in that they are connected to each other by a connecting material, and a net is stretched on the connecting material.

In another aspect of the present invention, in the above configuration, two sets of connecting members are used at predetermined intervals in a direction orthogonal to the direction of movement of the bogie, and the nets are placed in a frame having a predetermined small area. In addition to being composed of a plurality of stretched split nets, each split net can be detachably mounted on each connecting member.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIGS. 1 to 6 show a mobile safety net according to a first embodiment of the present invention. Represents a mobile safety net according to the second embodiment. The second embodiment of FIG. 7 shows a modification of the connecting structure between the connecting member 2 and the carriage 1 as described later.

The movable safety net according to each of the embodiments is used when roofing with folded plates 7, 7,... On beams 5, 5,. As shown in FIG. 1, a plurality of beams 5 are arranged at a predetermined interval L (L = about 3 to 4 m) in the gradient direction of the roof. In this embodiment, an H-beam is used as the beam 5, and the beam 5 made of the H-beam is used.
Is installed such that the upper surface is flat. still,
The width M (FIG. 4) of the beam 5 is about 100 mm.

On the upper surfaces of the beams 5, 5,..., A large number of tight frames 6 are attached at appropriate intervals. The tight frame 6 is formed by bending a narrow strip (width N = 40 to 45 mm in FIG. 4) into a mountain shape, and the lower end of the tight frame 6 is formed at the center of the upper surface of the beam 5 in the width direction. The part is fixed by means such as welding. The space between the two adjacent tight frames 6 and 6 is the same as the width of the folded plate 7 to be used (for example, 500 mm). Each beam 5,
Tight frame attached to 5 ...
Corresponds to the same position in the slope direction of the roof.

The folding plate 7 for roofing is bent to have an inverted trapezoidal cross section. The folded plates 7 are installed by caulking the edges of the folded plates 7 and 7 adjacent to each other in the width direction on the tight frame 6. When the folded plate 7 is set on the tight frame 6, as shown in FIG.
Between the lower surface of the beam 5 and the upper surface of the beam 5 (for example, 15 to 20).
mm).

The mobile safety net according to the first embodiment shown in FIGS. 1 to 6 has a plurality of trucks 1, 1... Mounted on the upper surfaces of beams 5, 5,. -It is configured to have a pair of connecting members 2, 2 for connecting each other, and a net 3 stretched on the connecting members 2, 2.

The trolley 1 has a base 10 having a length of, for example, about 1 to 1.5 m, and a total of four wheels 14, 14,... doing. The base 10 is formed into a vertical section gate shape by the left and right side plates 11, 11 and the upper plate 12, and the inside thereof is a space. The interval between the inner surfaces between the side plates 11 is set to be slightly wider (for example, 45 to 50 mm) than the width N (40 to 45 mm) of the tight frame 6. Both side plates 11, 11
Rear end (the right end in FIG. 3 is the leading end when moving)
Are formed with outwardly opening pieces 13, 13 which respectively open outward. The outer opening pieces 13 serve as guide pieces for guiding the tight frame 6 into the base 10 when the carriage 1 is moved backward on the beam 5.
The outer surface interval between the left and right wheels 14, 14 is slightly smaller than the upper surface width M (100 mm) of the beam 5, and the front, rear, left, and right wheels 14, 14,.
Is mounted on the upper surface. Also, each wheel 1
When the four, fourteenth,... Are placed on the beam 5, the height of the space in the base 10 is slightly higher than the height of the tight frame 6.

The carriage 1 is mounted on the beam upper surface with the base 10 straddling the right and left outer sides of the tight frame 6 on the beam 5 (outer side in the beam width direction). Installed. When the carriage 1 is placed on the upper surface of the beam 5, the tight frame 6 on the beam 5 is contained in the space of the base 10, and the tight frame 6 is always 2-3 in the entire length range of the base 10. There are pieces. Therefore, when the carriage 1 is installed, the side plates 11, 11 of the base 10 are close to the right and left outer sides of the tight frame 6, respectively, and when the carriage 1 moves on the beam 5, the tight frames 6, 6 ······································································· The roofing work is performed while sequentially moving to the right from the left side in FIG. 1 or FIG. 3 as described later, and at that time, the carts 1 on the beams 5, 5,... Also move to the right. However, since the left and right outer opening pieces 13 are formed at the leading end of the base 10,
The tight frame 6 can be securely fitted into the space of the base 10.

Each of the carts 1, 1,... Is connected by two connecting members 2, 2 while being positioned at the same position in the gradient direction of the roof. In this embodiment, a long pipe is used as the connecting member 2. If the length of the roof in the direction of inclination is long, a suitable number of pipes of a predetermined length are added to form the connecting member 2 of a required length. In addition, as a method of adding pipes, the pipes can be connected to each other by screws or connected via a short connecting pipe. Connecting materials 2, 2
Are connected by bolts 21 in this embodiment. That is, in a state where the carts 1, 1,... Are installed on the beam 5, the connecting members 2, 2 are connected to the carts 1, 1,.
.. are placed on the front upper surface and the rear upper surface, respectively, and the intersection of the connecting member 2 and the bogie 1 is
Tight at 21 ... In this case, the connecting member 2
Bolt holes are respectively formed at the same intervals as the beams 5 and 5, and screw holes are formed at predetermined positions of the base upper plate 12 of the truck 1. Further, the two connecting members 2 and 2 have an interval of about 1 m in the length direction of the bogie 1. As described above, when the carts 1, 1,... Are connected by the connecting members 2, 2,
Each of the carts 1, 1,... And the connecting members 2, 2 moves integrally on each of the beams 5, 5,. Also, each bolt 2
1 is detachable, and if the bolts 21 are removed, the connecting member 2 and the carriage 1 can be separated and dismantled.

As shown in FIG. 5, an engaging claw 51 which collides with the upper end of the front side (left side) of the tight frame 6 is attached to the upper plate 12 of the bogie base 10. This engaging claw 51
Is pivotally supported by a pin 52 so as to be able to swing up and down, and a spring 53
Is urged downward. And this locking claw 51 works as follows. First, when the carriage 1 is strongly pushed rearward (rightward) from the state shown by the solid line in FIG. 5 (the state in which the tip of the locking claw 51 is in contact with the upper end on the front side of the tight frame 6), the locking claw 51 is pressed. Move upward against the urging force of the spring 53 as shown by the reference numeral 51 'to disengage with the upper end of the tight frame 6, and after the locking claw has passed over the upper end of the tight frame, The pawl returns to the original position by the spring 53. Then, the carriage 1 is further moved rearward, and when the locking claw 51 reaches the position indicated by the reference numeral 51 ", the locking claw 51" abuts on the upper end on the front side of the next tight frame 6, and At this time, the hand pressing the carriage 1 feels resistance. Therefore, it can be confirmed that the bogie 1 has been moved exactly by one pitch based on the sense of resistance.

A net 3 is stretched over the connecting members 2 and 2. In this embodiment, the net 3 is formed by arranging a predetermined number of small-area divided nets 30 in parallel. Each divided net 30 is formed by extending a net material 32 in a rectangular frame 31 in plan view. In this embodiment, the split net 30 has a dimension in the beam length direction of 1500 to
It is formed to have a size of about 2000 mm and a roof slope direction dimension of about 900 to 1000 mm.

At the rear end (the right end in each figure) of the frame of the divided net 30, a rising frame 33 is provided upright. The rising frame 33 prevents the folded plate 7 to be installed from moving forward (to the right in the illustrated state) beyond the net 3. Further, a stepped-down lower surface portion 34 is formed on the front side (left side in the figure) of the split net 30.

A lock device 4 for fixing the frame 31 to the connecting members 2 is mounted on the frame 31 of each of the divided nets 30.
0 is provided. The locking device 40 includes a total of four fixed claws 41, 41,... Which abut against the rear side surface (two locations for each connected member) of each of the connecting members 2, 2.
41 .. is brought into contact with the connecting member 2 and the rear connecting member 2
And a slide claw 42 which engages with the front side surface of the vehicle in a detachable manner. As shown in FIG. 6, the slide claw 42 can slide in a vertical arc. And
When the slide claw 42 is moved upward as shown by a solid line in FIG.
It can be attached to and detached from (it can be loaded and unloaded from above),
When the slide member 42 is slid downward as indicated by a chain line (reference numeral 42 '), the connecting member 2 is held by the slide claw 42' and the fixed claw 41 from front and rear. Therefore, in a state where the connecting member 2 is held by the slide claw 42 and the fixed claw 41, the divided net 30 is not inadvertently displaced on the connecting members 2 and 2.

When the split net 30 is set on the connecting members 2 and 2, the upper surface of the lower surface 34 of the split net 30 is set on the tight frames 6 and 6 as shown in FIG. The lower part of the folded plate 7 is slightly lower than the lower surface. In this way, as shown in FIG. 3, when the next folded plate (reference numeral 7 ') is installed continuously to the existing folded plate 7, the lower part of the next folded plate 7' is installed. The work can be performed with the low surface portion 34 of the divided net 30 positioned at
After the folded plate 7 'is installed, the low surface portion 34 can be pulled out.

The safety net according to the embodiment of the present invention is assembled as follows. First, the carts 1, 1,... Are placed on the beams 5, 5,.
The two connecting members 2, 2 are placed on the upper part, and the connecting members 2, 2 and the carts 1, 1,... Are fixed with bolts 21, 21,. Subsequently, as shown in FIGS. 1 and 2, the divided nets 30, 30,... Are sequentially juxtaposed on the connecting members 2, 2 in the gradient direction of the roof, and the divided nets 30, 30,. Is fixed to the connecting member 2 by the lock device 40, and the assembly of the safety net Z is completed. In this state, the safety net Z
The whole can be moved in the length direction of the beam 5.

In order to install the folded plate 7 on the beam 5 using the safety net Z, the safety net Z is located at the starting end of the beam 5 (the left end in FIG. 1). The folded plate 7 is installed on each tight frame 6, 6,... Located at the same position in the gradient direction of the roof. At this time, since the folded plate 7 is assembled on the low surface portions 34, 34,... Of each of the divided nets 30, 30,... Even if the parts or tools are dropped from the work position (on the beam 5). The falling object can be received by the net 3. Then, after the first folded plate 7 is installed, the safety net Z is pushed backward and moved by one pitch (the width of the folded plate 7). At this time, as shown in FIG.
The engaging claws 51 of 1... Abut against the next tight frame 6 and can be moved exactly by one pitch. After sequentially installing the folded plates 7, 7,... On the entire surface of the roof in this manner, when the safety net Z is disassembled, the roofing work is completed.

As described above, the movable safety net Z according to the embodiment of the present invention can be assembled on the beams 5, 5,..., So that the scaffold for installing the net can be used as in the case where the safety net is installed below the beams. Becomes unnecessary. Also, this safety net Z
Is relatively small in the beam length direction, but has a net area of a width necessary for installation work of the folded plate 7, so that the function as a safety net can be sufficiently achieved at the time of use. Further, since the safety net Z can be moved in the length direction of the beam 5 by each of the carts 1, 1,..., Even if the net area is small, the safety net Z is sequentially cut by a predetermined width. By simply moving it, a safety net can be used throughout the entire roof. In addition, as in this embodiment, the net 3 is
When a plurality of divided nets 30, 30,... In which a net material 32 is stretched in a frame 31 are formed, the entire net 3 becomes strong, and each of the divided nets 30, 30,. Therefore, the work of stretching or dismantling the net 3 can be easily performed. In particular, since there is no need to tie or untie the net material, even if the net is stretched (or dismantled) on an unstable scaffold, the safety net can be easily stretched. .

The second embodiment shown in FIG. 7 shows a modification of the connecting structure between the carriage 1 and the connecting member 2. In the second embodiment, two receiving bases 22, 22 for receiving the connecting members 2, 2 are mounted on the base upper plate 12 of the carriage 1. Each of the receiving stands 22 has two rising pieces 23, 23 with an interval slightly wider than the outer diameter of the connecting member 2, and one of the rising pieces 23 has a screw hole 24 formed therein. And
In the second embodiment, the bolts 21, 2 are inserted in the receiving bases 22, 22 respectively.
The connecting member 2 can be fixed by screwing the connecting members 21 into the screw holes 24 and 24 to tighten the connecting member 2. In this way, the connecting member 2 can be fixed to the trolley 1 at an arbitrary position in the length direction, and it is not necessary to perform special processing such as a bolt hole on the connecting member 2 as in the first embodiment. Moreover, even if the distance between the carriages 1 and 1 (the distance between the beams 5 and 5) is different, it can be handled without any problem.

[0025]

According to the mobile safety net of the present invention,
It has the following effects.

(1) Since the net 3 can be assembled on the beams 5, 5,..., There is no need for a scaffold for installing the net as in the case where a safety net is installed below the beams.

(2) Since the safety net Z can be moved in the length direction of the beam 5 by each of the carts 1, 1, ..., Even if the net area is small, the safety net Z can be sequentially moved. A safety net can be used for the entire roof by simply moving the net by a predetermined width, and a net with a small area can be effectively used.
Although the safety net has a relatively small width in the beam length direction, the safety net has a net area of a width required when the folded plate 7 is installed, so that the function as the safety net is not impaired.

(3) Since the safety net Z has a small area, the work of stretching or disassembling the safety net Z can be performed easily and in a short time.

(4) Put the net 3 in the frame 31
When the plurality of divided nets 30, 30... Are stretched, the entire net 3 becomes strong, and each of the divided nets 30, 30,.
It is not necessary to tie or untie the net material 32 with a string during the stretching work or the dismantling work, and the handling becomes easy.

[Brief description of the drawings]

FIG. 1 is a plan view showing a stretched state of a mobile safety net according to a first embodiment of the present application.

FIG. 2 is an enlarged view taken along the line II-II of FIG.

FIG. 3 is an enlarged view taken along a line III-III in FIG. 1;

FIG. 4 is a partially exploded perspective view of the movable safety net of FIG. 1;

FIG. 5 is an operation explanatory view of an engagement claw portion in FIG. 3;

FIG. 6 is an operation explanatory view of a lock device portion in FIG. 3;

FIG. 7 is a perspective view showing a connecting structure of a bogie and a connecting member according to a second embodiment of the present application.

[Explanation of symbols]

1 is a bogie, 2 is a connecting material, 3 is a net, 5 is a beam, 6 is a tight frame, 7 is a folded plate, 30 is a split net, 31 is a frame, and 32 is a net material.

Claims (2)

[Claims] 1. A plurality of trolleys (1) which can be moved in the length direction of each beam (5) on a plurality of beams (5) arranged at predetermined intervals in the gradient direction of the roof. A mobile safety net, characterized in that the carts (1) are connected to each other by a connecting member (2), and a net (3) is stretched on the connecting member (2). 2. Two sets of connecting members (2) are used at predetermined intervals in a direction orthogonal to the moving direction of the bogie (1), and a net (3) is provided in a frame (31) having a predetermined small area. Lumber (3
2. The device according to claim 1, wherein each of the divided nets (30) is detachably mounted on each of the connecting members (2) while being constituted by a plurality of divided nets (30) that are stretched. Mobile safety net.