JP2021063355A - Hatch safety fence - Google Patents

Abstract

To provide a hatch safety fence having high folding and expanding workability.SOLUTION: The hatch safety fence comprises: a safety fence 2 installed around a hatch 30 having an opening 31 formed on a floor F of a building; a floor lid 32 attached to the opening 31 of the hatch 30 so as to be opened/closed; a winch 3 for opening/closing the floor lid 32; and casters 4 attached to a lower part of the safety fence 2. The safety fence 2 is configured such that outer parts of a pair of opposing first fence bodies 10, 11 on a side similar to a width direction are connected so as to swing at a pair of second fence bodies 12, 13 via first hinges 5. The second fence body 12 is configured such that fence members 14, 15 are connected so as to be folded via second hinges 6. The second fence body 13 is configured such that fence members 16, 17 are connected so as to be folded via the second hinges 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hatch safety fence installed around a hatch used when carrying in and out the equipment in a building such as a substation or a factory where a relatively large equipment is used.

Buildings that use relatively large equipment, such as substations and factories, are provided with hatches that allow equipment and materials to be loaded and unloaded from openings formed on the floor above the floor to different floors.

As a safety measure for preventing a person from falling from such an opening of the hatch, a safety fence for the hatch arranged so as to surround the hatch has been proposed (see, for example, Patent Document 1). The hatch safety fence described in Patent Document 1 includes a safety fence in which four fence bodies are connected in a square shape via a hinge, and a gate-shaped arm provided with a winch that can be disassembled into a plurality of fences. An opening / closing door is provided on the fence body on the front side, and one leg of the arm is detachably attached to a pillar provided in one corner of the fence body.

By installing a safety fence so as to surround the opening of the hatch, it is possible to prevent people from falling through the opening of the hatch, and the four fences that make up the safety fence can be used. It can be folded flat one by one via a hinge.

Jikkai Sho 53-79726

The safety fence of the hatch safety fence described in Patent Document 1 needs to be folded one by one when folded, and four fences need to be opened one by one when unfolded. Therefore, there is a problem that the workability of folding and unfolding is poor.

Therefore, an object of the present invention is to provide a safety fence for a hatch having good workability in folding and unfolding.

In order to solve the above problems, the hatch safety fence according to the present invention is attached to a safety fence arranged around a hatch having an opening formed on the floor of a building and to be openable and closable to the opening of the hatch. In a hatch safety fence having a winch for opening and closing the floor lid and a plurality of casters attached to the lower part of the safety fence, and the winch is attached to the safety fence, the safety fences face each other. It has a pair of first fence bodies and a pair of second fence bodies that swingably connect the outer portions of the first fence bodies on the same side in the width direction via the first hinge portion. The pair of second fence bodies are formed by connecting two fence members to each other so as to be foldable via a second hinge portion, and the safety fence is two fences of the pair of second fence bodies. The unfolded state in which the members are located on the same straight line, the second hinge portion is located inside the width direction of the first fence body, and the two fence members of the pair of second fence bodies are folded. It is possible to adopt a configuration that takes the folded state.

In this configuration, the safety fence folds the two fence members of the second fence body while moving the pair of first fence bodies inward in the opposite direction (opposite direction) from the deployed state. Can be put into the folded state. Further, the safety fence can be brought into the unfolded state by opening the two fence members of the second fence body while moving the pair of first fence bodies outward in the opposite direction from the folded state. ..

The pair of first fence bodies has first protrusions provided on both sides in the width direction, and the first protrusions project inward in the opposite direction of the pair of first fence bodies. The first protruding portion and the fence member of the second fence body are connected via the first hinge portion, and each fence member of the second fence body is an end on the second hinge portion side. The second protruding portion has a second protruding portion provided on the portion, and the second protruding portion protrudes outward in the width direction of the first fence body when the safety fence takes the unfolded state, and the second fence body It is possible to adopt a configuration in which the second protruding portions of the two fence members are connected via the second hinge portion.

With this configuration, the safety fence in the folded state is separated from each other by the distance obtained by adding the protrusion lengths of the first protrusion of the first fence and the second protrusion of the two fence members. Can be made larger and the safety fence can stand on its own in the folded state.

In the hatch safety fence according to the present invention, the safety fence in the deployed state can be easily folded by folding the two fence members of the second fence body while moving the pair of first fence bodies inward in the opposite direction. Since it can be in a state, the workability of folding the safety fence is improved.

Further, the safety fence in the folded state can be easily deployed by locating the two fence members of the second fence body in a straight line while moving the pair of first fence bodies outward in the opposite direction. Therefore, the workability of deploying the safety fence is improved.

Further, in the folded state safety fence, since the distance between the pair of first fence bodies becomes large, the safety fence can be made to stand on its own in the folded state, and the self-supporting safety fence can be moved by the casters.

Front view showing the deployed state of the hatch safety fence of the first embodiment according to the present invention. Top view showing the deployed state of the hatch safety fence of the first embodiment Side view showing the deployed state of the hatch safety fence of the first embodiment Top view showing the folded state of the hatch safety fence of the first embodiment Front view showing the deployed state of the hatch safety fence of the second embodiment according to the present invention. Top view showing the deployed state of the hatch safety fence of the second embodiment Side view showing the deployed state of the hatch safety fence of the second embodiment Top view showing the folded state of the hatch safety fence of the second embodiment

Hereinafter, the hatch safety fence of the first embodiment according to the present invention will be described with reference to the drawings. The hatch safety fence 1 is arranged around the hatch 30 provided on the floor F on the upper floor side of a building such as a substation or a factory, for example. As shown in FIG. 1, the hatch 30 is a vertical hole having a rectangular cross section penetrating the floor F, and an opening 31 is formed in the floor F. A floor lid 32 is attached to the opening 31 of the hatch 30 so as to open and close the opening 31 via a hinge 33 so as to be openable and closable.

As shown in FIGS. 1 to 4, the hatch safety fence 1 is provided at a safety fence 2 arranged around the opening 31 of the hatch 30, a winch 3 for opening and closing the floor lid 32, and a lower portion of the safety fence 2. It is equipped with casters 4 to which a plurality of casters can be attached.

As shown in FIGS. 1 and 2, the safety fence 2 has a pair of first fence bodies 10 and 11 facing each other and outer portions of the pair of first fence bodies 10 and 11 on the same side in the width direction. It has a pair of second fence bodies 12 and 13 that are swingably connected via a hinge portion 5. As shown in FIG. 3, of the pair of first fence bodies 10 and 11, one of the first fence bodies 10 is formed from a rectangular frame body and has a vertical rail 10a arranged at the center position in the width direction. , It has two cross rails 10b arranged at intervals in the vertical direction.

A fixing piece 10c with respect to the floor F is attached to the lower part of the vertical rail 10a. The position of the fixed piece 10c in the vertical direction can be adjusted. A support column 3a that stands up in the vertical direction and supports the winch 3 is fixed to the first fence body 10. The upper part of the support column 3a projects upward from the first fence body 10, and the winch 3 is attached to the projecting portion.

The winch 3 has a drum 3c around which the wire 3b is wound, a handle 3d that applies a rotational force to the drum 3c, a pulley 3e that changes the direction of the wire 3b drawn from the drum 3c, and a brake mechanism (not shown). A hook 3f is attached to the tip of the wire 3b. The hook 3f can be engaged with the engaging pin 32a provided on the portion of the floor lid 32 opposite to the hinge 33 side. A regulation chain 9 is detachably suspended from the support column 3a of the winch 3.

The first fence body 10 has a lock bar 7 detachably attached to the upper end portion and a caster 4 attached to the lower end portion. Both ends of the lock bar 7 are bent at right angles in the same direction, a support shaft portion 7a is formed at one bent portion, and an engaging shaft portion 7b is formed at the other bent portion. The engaging shaft portion 7b is shorter than the support shaft portion 7a.

As shown in FIG. 4, the support shaft portion 7a and the engagement shaft portion 7b penetrate the upper part of the first fence body 10 from above, and the stopper ring 7c is fixed to the lower end portion of the support shaft portion 7a (FIG. 3). reference). The stopper ring 7c prevents the lock bar 7 from coming out from the upper part of the first fence body 10. The lock bar 7 is swingably supported by the support shaft portion 7a on the upper portion of the first fence body 10 in a state where the engaging shaft portion 7b is located above the upper portion of the first fence body 10.

The other first fence body 11 is formed from a rectangular frame body having the same size as one first fence body 10, and is spaced vertically from one vertical rail 11a arranged at the center position in the width direction. It has two cross rails 11b arranged in place. A fixing piece 11c with respect to the floor F is attached to the lower part of the vertical rail 11a. The position of the fixed piece 11c in the vertical direction can be adjusted. The other first fence body 11 has, like the one first fence body 10, a lock bar 7 detachably attached to the upper portion and a caster 4 attached to the lower end portion.

On the other hand, the second fence body 12 is formed by connecting two fence members 14 and a fence member 15 to each other via a second hinge portion 6 so as to be swingable in the horizontal direction. The fence member 14 and the fence member 15 are formed of a rectangular frame body having the same size, have the same height as the first fence body 10, and have a width dimension half that of the first fence body 10.

The fence member 14 and the fence member 15 have two cross rails 14a, 14a and cross rails 15a, 15a arranged at intervals in the vertical direction. The upper portions of the fence members 14 and 15 have through holes 14b and 15b through which the engaging shaft portion 7b of the lock bar 7 is inserted (see FIG. 2).

A lock frame 8 is attached to the upper portion of the fence member 14 so as to be movable in the width direction of the fence member 14. The lock frame 8 is formed of a frame member having a U-shaped cross section. The lock frame 8 can be moved between a position where the safety fence 2 is deployed and fits only on the upper part of the fence member 14, and a position where the lock frame 8 fits only on the upper part of the fence member 14 and the upper part of the fence member 15. ing. When the lock frame 8 is in a position where it fits on the upper part of the fence member 14 and the upper part of the fence member 15, folding of the fence member 14 and the fence member 15 is restricted.

The second fence body 13 is formed by connecting two pairs of fence members 16 and 17 to each other via a second hinge portion 6 so as to be swingable in the horizontal direction. The pair of fence members 16 and 17 are made of a rectangular frame member having the same height as the first fence body 10 and having a width dimension half that of the first fence body 10. The fence member 16 has two cross rails arranged at intervals in the vertical direction. The fence member 17 has two cross rails arranged at intervals in the vertical direction. Through holes 16b and 17b through which the engaging shaft portion 7b of the lock bar 7 is inserted are provided in the upper portions of the fence member 16 and the fence member 17 (see FIG. 2).

Similar to the fence member 14 of the second fence body 12, the lock frame 8 is attached to the fence member 16 of the second fence body 13 so as to be movable in the width direction of the fence member 16. Like the lock frame 8 of the fence member 14, the lock frame 8 of the fence member 16 is fitted to the upper part of the fence member 16 and the fence member 17, thereby restricting folding between the fence member 16 and the fence member 17. To do.

A fence member 17 of the second fence body 13 is oscillatingly connected to the outer portion of the first fence body 10 in the width direction via the first hinge portion 5. The fence member 15 of the second fence body 12 is oscillatingly connected to the other end of the first fence body 10 in the width direction via the first hinge portion 5.

The fence member 16 of the second fence body 13 is oscillatingly connected to the outer portion of the first fence body 11 in the width direction via the first hinge portion 5. The fence member 14 of the second fence body 12 is oscillatingly connected to the other outer portion of the first fence body 11 in the width direction via the first hinge portion 5.

The first hinge portion 5 includes a top hinge portion 5a and a bottom hinge portion 5b. The hinge axes of the top hinge portion 5a and the bottom hinge portion 5b are arranged on the same straight line in the vertical direction. As the first hinge portion 5, a known pair of upper and lower butterfly hinges can be used.

The second hinge portion 6 includes a top hinge portion 6a and a bottom hinge portion 6b. The hinge axes of the top hinge portion 6a and the bottom hinge portion 6b are arranged on the same straight line in the vertical direction. As the second hinge portion 6, a known pair of upper and lower butterfly hinges can be used.

As shown in FIG. 2, in the safety fence 2, the fence member 14 and the fence member 15 of the second fence body 12 are located on the same straight line, and the fence member 16 and the fence member 17 of the second fence body 13 are in contact with each other. A state in which they are located on the same straight line, that is, a developed state forming a rectangular shape in a plan view is adopted. Further, as shown in FIG. 4, in the safety fence 2, the fence member 14 and the fence member 15 of one second fence body 12 are mutually folded, and the fence member 16 and the fence of the other second fence body 13 are folded. A folded state is adopted in which the members 17 and the members 17 are folded with each other.

The hatch safety fence 1 of the first embodiment of the present invention is configured as described above. Next, how to use the hatch safety fence 1 of this embodiment will be described.

As for the hatch safety fence 1 before use, the safety fence 2 shown in FIG. 4 is usually stored in a folded state. A regulation chain 9 is hung between the fixed piece 10c of the first fence body 10 and the fixed piece 11c of the first fence body 11 with respect to the safety fence 2 in the folded state.

Next, the safety fence 1 for the hatch in which the safety fence 2 is in the folded state is moved to the vicinity of the hatch 30 by the caster 4, and the safety fence 2 is in the deployed state. In this deployed state, each of the two lock bars 7 of the first fence body 10 is rotated, and the engaging shaft portion 7b is inserted into each of the through hole 15b of the fence member 15 and the through hole 17b of the fence member 17. Similarly, the two lock bars 7 of the first fence body 11 are rotated to insert the engaging shaft portion 7b into each of the through hole 14b of the fence member 14 and the through hole 16b of the fence member 16.

Further, the lock frame 8 of the second fence body 12 is fitted to the upper parts of the fence member 14 and the fence member 15, and the lock frame 8 of the second fence body 13 is fitted to the upper parts of the fence member 16 and the fence member 17. By operating the lock bar 7 and the lock frame 8, the hatch safety fence 1 is held in the deployed state.

Subsequently, the hatch safety fence 1 in which the safety fence 2 is deployed is moved by the casters 4, and the hatch safety fence 1 is arranged around the floor lid 32. At this time, the first fence body 10 of the hatch safety fence 1 is located outside the side portion of the floor lid 32 on the hinge 33 side. The operation of the lock bar 7 and the lock frame 8 may be performed after the hatch safety fence 1 is arranged around the floor lid 32.

After arranging the hatch safety fence 1 around the floor lid 32, bolts inserted into the fixing piece 10c of the first fence body 10 and the fixing piece 11c of the first fence body 11 are formed in advance on the peripheral edge of the hatch 30. It is screw-coupled to the female screw (not shown). As a result, the hatch safety fence 1 is fixed around the floor lid 32.

In this fixed state, the hook 3f fixed to the wire 3b of the winch 3 is engaged with the engaging pin 32a of the floor lid 32. After that, the handle 3d is rotated to wind the wire 3b around the drum 3c, and the floor lid 32 is opened via the hinge 33 to open the opening 31 of the hatch 30. With the opening 31 of the hatch 30 open, the equipment and materials required between the upper floors and the lower floors are carried in and out by a crane (not shown) through the hatch 30.

After the loading / unloading work of the equipment and materials is completed, the handle 3d of the winch 3 is operated to send out the wire 3b from the drum 3c, the floor lid 32 is closed via the hinge 33, and the opening 31 of the hatch 30 is closed. The hook 3f of the wire 3b is disengaged from the engaging pin or 32a of the floor lid 32, and the wire 3b is wound around the drum 3c.

Subsequently, the four lock bars 7 are lifted, the engaging shafts 7b of the two lock bars 7 are inserted into the upper part of the first fence body 10, and the engaging shafts 7b of the remaining two lock bars 7 are inserted. Insert it into the upper part of the first fence body 11. Further, the lock frame 8 is moved in the width direction of the fence member 14 (fence member 16) to release the mating state between the fence member 14 and the fence member 15 and between the fence member 16 and the fence member 17. To do.

Then, while moving the first fence body 10 and the first fence body 11 inward in the opposite direction, the fence member 14 and the fence member 15 of the second fence body 12 are mutually folded, and the second fence body 13 The fence member 16 and the fence member 17 are folded into each other to bring the safety fence 2 into a folded state. Finally, the regulation chain 9 is hung between the fixed piece 10c of the first fence body 10 and the fixed piece 11c of the first fence body 11 to hold the safety fence 2 in the folded state.

As described above, the hatch safety fence 1 of this embodiment has good workability for deploying and folding the safety fence 2.

Next, the hatch safety fence 1 according to the second embodiment of the present invention will be described with reference to FIGS. 5 to 8 of the drawing.
This second embodiment is provided on the first projecting portions 20 and 20 provided at both ends in the width direction of the first fence body 10 and on both side portions in the width direction of the first fence body 11 with respect to the first embodiment. A point having the first projecting portions 21 and 21, a second projecting portion 24 and a second projecting portion 25 provided on the second hinge portion 6 side of the fence member 14 of the second fence body 12 and the fence member 15, and a second A point having a fence member 16 of the fence body 13 and a second protruding portion 26 and a second protruding portion 27 provided on the second hinge portion 6 side of the fence member 17, and a point where the lock frame 8 is a lock bar 7. The other configurations are the same as those of the first embodiment. Therefore, in the following, only the configurations different from those of the first embodiment will be described, and those having the same configurations as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 5 and 6, the first protruding portions 20 and 20 of the first fence body 10 project inward in the opposite direction of the first fence body 10 and the first fence body 11. Further, the first projecting portions 20 and 20 project from the upper portion and the lower portion of the frame body forming the first fence body 10.

The first protruding portion 20 on one side in the width direction of the first fence body 10 and the fence member 17 of the second fence body 13 are oscillatingly connected via the first hinge portion 5. The first protruding portion 20 on the other side in the width direction of the first fence body 10 and the fence member 15 of the second fence body 12 are swingably connected via the first hinge portion 5. A caster 4 is attached to the lower part of the fence member 15 and the fence member 17 on the first hinge portion 5 side.

The first protruding portions 21, 21 of the first fence body 11 project inward in the opposite direction of the first fence body 10 and the first fence body 11. The first projecting portions 21, 21 project from the upper portion and the lower portion of the frame body forming the first fence body 11.

The first protruding portion 21 on one side in the width direction of the first fence body 11 and the fence member 16 of the second fence body 13 are swingably connected via the first hinge portion 5. The first protruding portion 21 on the other side in the width direction of the first fence body 11 and the fence member 14 of the second fence body 12 are oscillatingly connected via the first hinge portion 5. A caster 4 is attached to the lower part of the fence member 14 and the fence member 16 on the first hinge portion 5 side.

The second protruding portion 24 and the second protruding portion 25 of the second fence body 12 project outward in the width direction of the first fence body 10 when the safety fence 2 takes the deployed state. The second protruding portion 24 and the second protruding portion 25 are connected via the second hinge portion 6.

The second protruding portion 26 and the second protruding portion 27 of the second fence body 13 project outward in the width direction of the first fence body 10 when the safety fence 2 takes the deployed state. The second protruding portion 26 and the second protruding portion 27 are connected via the second hinge portion 6.

As shown in FIG. 6, the lock bar 7 is attached so as to bridge between the second protrusion 24 and the second protrusion 25, and between the second protrusion 26 and the second protrusion 27. There is. In this lock bar 7, the support shaft portion 7a penetrates the fence member 15 and the fence member 17, and the engaging shaft portion 7b engages with the through hole 14c and the through hole 16c formed in the fence member 14 and the fence member 16. It has become like. The lock bar 7 regulates folding between the fence member 14 and the fence member 15 and between the fence member 16 and the fence member 17.

In the hatch safety fence 1 of the second embodiment, when the safety fence 2 takes a folded state, the first protruding portions 20 and 20 of the first fence body 10 and the first protruding portions 21 and 21 of the first fence body 11 A pair of the second protruding portion 24 and the second protruding portion 25 of the second fence body 12 and the distance obtained by adding the protruding lengths of the second protruding portion 26 and the second protruding portion 27 of the second fence body 13. The distance between the first fence bodies 10 and 11 becomes large. As a result, when the safety fence 2 is in the folded state, the safety fence 2 can be made to stand on its own. Further, the self-supporting safety fence 2 can be easily moved by the caster 4.

1 Hatch safety fence 2 Safety fence 3 Winch 3a Strut 3b Wire 3c Drum 3d Handle 3e Slider 3f Hook 4 Caster 5 First hinge part 6 Second hinge part 5a, 6a Top hinge part 5b, 6b Bottom hinge part 7 Lock bar 7a Support Shaft 7b Engagement Shaft 7c Stopper ring 8 Lock frame 9 Regulation chain 10, 11 First fence 10a, 11a Vertical rail 10b, 11b Horizontal rail 10c, 11c Fixed piece 12, 13 Second fence 14, 15, 16 , 17 Fence members 14a, 15a Cross rails 14b, 14c, 15b, 16b, 16c, 17b Through holes 20, 21 First protrusions 24, 25, 26, 27 Second protrusions 30 Hatch 31 Opening 32 Floor lid 32a Pin 33 Hinge F Floor

Claims (2)

A safety fence arranged around a hatch having an opening formed on the floor of a building, a winch for opening and closing a floor lid operably attached to the opening of the hatch, and a plurality of winches attached to the lower part of the safety fence. In a hatch safety fence provided with casters and the winch is attached to the safety fence.
A pair of safety fences that oscillately connect a pair of first fence bodies facing each other and outer portions of the first fence bodies on the same side in the width direction via a first hinge portion. The pair of second fence bodies has a second fence body, and the two fence members are foldably connected to each other via a second hinge portion, and the safety fence is the pair. The unfolded state in which the two fence members of the second fence body are located on the same straight line, and the second hinge portion is located inside the width direction of the first fence body, and the pair of second fence bodies A safety fence for hatches, characterized in that the two fence members are in a folded state. The pair of first fence bodies has first protrusions provided on both sides in the width direction, and the first protrusions project inward in the opposite direction of the pair of first fence bodies. The first protruding portion and the fence member of the second fence body are connected via the first hinge portion.
When each fence member of the second fence body has a second protruding portion provided at an end portion on the second hinge portion side thereof, the second protruding portion is when the safety fence takes the unfolded state. The first fence body protrudes outward in the width direction, and the second protruding portions of the two fence members of the second fence body are connected via the second hinge portion. The hatch safety fence according to claim 1.

Images