JP6120513B2 - Net type ladder - Google Patents

Description

  The present invention relates to a lifting device that is excellent in storage and portability, productivity, and safety during lifting.

  Various types of elevators such as ladders have been proposed in the past, and they are widely used not only for home work but also at construction sites or for evacuation equipment. Among the many lifting devices, a highly versatile one is a foldable ladder that is excellent in portability and storability (see, for example, Patent Document 1).

  Moreover, the ladder apparatus for evacuation of patent document 2 is known as a raising / lowering apparatus used as an evacuation apparatus. This evacuation ladder device is installed on the outer wall of a building, and is deployed from a storage state to a use state when used, and an escape person descends from the floor to the ground to evacuate urgently. .

JP 2010-28579 A JP 2007-2452 A

  The folding ladder as described in the above-mentioned Patent Document 1 has a larger size when folded as the total length when unfolded is longer. Therefore, the total length is limited to a certain length in consideration of storage and portability. . Therefore, it cannot be used as a lifting device that moves a long distance up and down. On the other hand, the evacuation ladder apparatus described in Patent Document 2 is not sufficient from the viewpoint of productivity because of the large number of parts used to manufacture it. And conventionally, further improvement in safety has been required for such a lifting device.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an elevating device that is excellent in storage and portability even when the overall length is long, and that is excellent in productivity and safety during elevating. It is in.

In order to solve the above problem, the net type ladder according to claim 1 is:
A plurality of net constitution single pieces formed by bending a rigid wire into a wave shape are connected in series, and the connection is made by engaging adjacent net constitution single pieces with each other at their bent portions. The mesh body has a size that can be used for limbs, and one end in the length direction of the mesh body is fixed in use, and the other end hangs downward. is, the wave shape is characterized by a rectangular waveform der Rukoto.

  According to this configuration, the number of places on which limbs are hung by the mesh structure of the net body is larger than that of a normal ladder, so that the user can ascend and descend without difficulty. In addition, the net body is made of a rigid wire, and is not deformed only by hanging the limbs, so that the limbs can be stably placed.

Since the net body has a structure in which the net constituting single bodies are engaged with each other, even if the net body is formed of a rigid wire, it can be wound into a compact state when not used. Therefore, it can be stored and stored even if the installation space is small, and it is also suitable for carrying. In addition, since the net type ladder can be manufactured by simply engaging the wire rods bent in a wave shape, it is excellent in terms of productivity. By crossing the rectangular wave-shaped net constituting singles with each other, a horizontal part capable of stably performing limbs is formed, so that safety is further improved.

The net type ladder according to claim 2 , wherein the net constituting unit has four vertical parts in the suspended state of the net body and three horizontal parts respectively positioned between the four vertical parts, At both ends of the wire rod, there are provided insertion portions for connecting with adjacent net constituting single members. According to this configuration, the mesh structure of the net body can be formed using a wire having a simple structure, and the wire is only required to be as short as necessary, so that the productivity is further improved.

The net type ladder according to claim 3 , wherein a plurality of horizontal ropes extending in a substantially horizontal direction in the suspended state are provided on the net body at a predetermined interval in the vertical direction. . According to this configuration, limbs can be hung not only on the mesh of the mesh body but also on the horizontal rope, so that safety during lifting is further improved.

The net type ladder according to claim 4 is characterized in that the wire is a stranded wire formed by twisting a plurality of strands having a tensile strength of 400 to 2000 N / mm ² . Thereby, the intensity | strength of a net | network body is fully ensured and the deformation | transformation of the wire rod by the load load of a raising / lowering person can be prevented reliably. Moreover, if the wire having the above-described high tensile strength is used, the net ladder itself can be designed to be lightweight, and therefore, the portability is further improved.

The net-type ladder according to claim 5 is an emergency escape evacuation device that is stored on the floor of a building during normal times and is suspended from the floor in the event of an emergency. The net type ladder is suitable for descending from the top to the bottom in a deployed state in which one end is suspended downward from a stored state such as a wound state. Therefore, it is useful as an evacuation device for descending from the floor of a building to a place where safety can be ensured such as the ground.

The net type ladder according to claim 6 is characterized in that a fire and smoke-proof sheet is provided on the building side of the net body in a state where the net body is suspended. According to this configuration, it is possible to prevent the escape person from sucking smoke or coming into contact with the flame in the event of a fire.

  The net-type ladder of the present invention is composed of a net that can be produced simply by engaging wire rods bent into a wave shape, and even if the overall length is long, the net-type ladder is wound. And compact. And a user can go up and down stably by putting a limb on the wire which has rigidity which constitutes a net. Therefore, it can be said that the net type ladder of the present invention is an elevating device that is excellent in storage and portability even when the entire length is long, and that is excellent in productivity and safety during elevating.

1 is an overall view showing a first embodiment of a net type ladder according to the present invention. It is a detailed view of a single unit for net configuration. It is detail drawing of a wire. It is explanatory drawing which shows the winding state of a net-type ladder. It is explanatory drawing which shows the shortened state of a net-type ladder. It is explanatory drawing which shows the use condition of a net-type ladder. It is a general view which shows 2nd Embodiment of the net type | formula ladder of this invention. It is a detailed view of a single unit for net configuration. It is explanatory drawing at the time of using a net-type ladder as an evacuation device for emergency escape.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a general view showing a first embodiment of a net type ladder according to the present invention, FIG. 2 is an explanatory view showing a single unit for forming a net, and FIG. 4 is an explanatory view showing a winding state of the net type ladder of FIG. 5 is an explanatory view showing a shortened state of the net type ladder of FIG. 1, and FIG. 6 is a usage diagram of the net type ladder of FIG.

  As shown in FIG. 1, the net-type ladder 10 of the present embodiment includes a plurality of net configuration units 12-1 to 12 -n formed by bending and bending a single wire 11 into a rectangular wave shape. Each of the adjacent net-constituting units 12-1 to 12-n has a long net body 12 that is configured, and is connected to each other at a bent portion that is a bent portion. The net constituent units 12-1 to 12-n are continuously connected in the vertical direction in the installed state.

  FIG. 2 is a detailed view of the net configuration units 12-1 to 12-n shown in FIG. The net constituting single bodies 12-1 to 12-n are made of a rigid wire 11, and the wire 11 is bent at substantially right angles at six locations 13a to 13f on the same plane so as to have a rectangular wave shape, and four vertical portions 16a. -D and three horizontal portions 18a-c located between the vertical portions 16a-d, respectively. The length of the horizontal portions 18a to 18c is, for example, 10 to 30 cm, preferably 15 to 30 cm, and the length of the vertical portions 14a to 14d is, for example, 5 to 30 cm, preferably 10 to 30 cm.

  The wire 11 has insertion parts 14a and 14b with both ends thereof being ring-shaped knots. In order to connect the adjacent net constituting units 12-1 to 12-n adjacent to each other in order to produce the net type ladder 10 shown in FIG. 1, a separate state in which both ends are not knotted to the insertion portions 14 a and 14 b. This is done by inserting both ends of the net constituting single body and engaging each bending portion, and then repeating the operation of setting both ends of the inserted net constituting single wire 11 to the ring-shaped knots. As shown in FIG. 1, adjacent net constituting single bodies are connected to each other at each bending point so that one concave portion engages with the other convex portion.

The mesh of the mesh body 12 has a size that allows a limb to be hung, and the opening of the mesh structure is substantially rectangular. The opening area is, for example, 50 to 900 cm ² , preferably 150 to 900 cm ² . The user grasps the vertical portions 16a to d and the horizontal portions 18a to c (see FIG. 2) with his / her hand and steps on the horizontal portions 18a to c (see FIG. 2) with his / her foot to raise and lower the net-type ladder 10. Do.

  Since the net-type ladder 10 of the present invention is a ladder using a net body 12 having a mesh structure, there are many places where limbs are hung, and it is possible to climb up and down without difficulty. It is excellent. Moreover, since it can produce only by mutually engaging the wire bent into the waveform, it is excellent also in terms of productivity. Furthermore, each of the net constituting units 12-1 to 12-n of this embodiment has a simple structure in which one wire is bent at six points and insertion portions are formed at both ends, and the wire forms a mesh structure. It is enough to use the shortest necessary.

  As the wire 11 constituting the net constituting members 12-1 to 12-n, a rigid wire, particularly a metal wire can be used. The net 12 using the rigid wire does not deform when the user simply puts his / her limbs, and can climb up and down with his / her limbs stably.

What is preferable as the wire 11 is a stranded wire (6 to 25 mm in diameter) produced by twisting a plurality (for example, 2 to 5) of strands (for example, 2 to 5 mm in diameter). As the strand, one having a tensile strength of 400 to 2000 N / mm ² , preferably 800 to 2000 N / mm ² is used. As such an element wire, a hard and rigid wire made of stainless steel or iron can be used. If a wire having a high tensile strength is used, the net ladder itself can be designed to be lightweight, which is further advantageous for carrying. FIG. 3 shows a detailed view of the wire 11 made of stranded wire. A twisted wire (wire 11) is formed by twisting three strands 21 as shown. By using a stranded wire, when the wire is bent to have a wave shape, the bending can be performed without damaging the wire itself. The strand 21 is preferably subjected to anticorrosion treatment. The anticorrosion treatment can be performed, for example, by coating with zinc plating, aluminum zinc alloy plating or resin (polypropylene, polyethylene, polyvinyl chloride) or the like.

  The width of the net-type ladder 10 is not particularly limited, but 0.5 to 3 m, and the length can be appropriately set according to the height of the place to be used.

  FIG. 4 is an explanatory view showing a state where the net type ladder 10 of FIG. 1 is wound. As described above, the net-type ladder 10 is composed of a rigid wire, and the wire 11 itself is difficult to be bent by human power, but the net-constituting units 12-1 to 12-n are connected to each other. At each location, each net constituting unit is in a non-fixed state where it is only engaged, so that the entire structure can be bent. Therefore, it is possible to wind the respective engaged portions by bending them in a stepwise manner from the developed state.

  The net-type ladder 10 of the present embodiment can be expanded and contracted as well as wound. FIG. 5 is an explanatory view showing a shortened state of the net type ladder 10. The shortened state shown in the figure can be obtained by narrowing the interval between the net configuration units 12-1 to 12-n from the expanded state of FIG. In order to change from the shortened state to the expanded state, it is only necessary to fix one end in the length direction of the mesh body 12 at an arbitrary place and hang down or pull the other end downward.

  Thus, since the net-type ladder 10 can be in a compact state in a wound state (FIG. 4) or a shortened state (FIG. 5) during storage or transportation, it is excellent in storage and portability. .

  FIG. 6 is an explanatory diagram showing a state where the user ascends and descends the net type ladder 10 of the present embodiment. One end of the net-type ladder 10 in the length direction is fixed with a connecting member (not shown) such as a shackle, and the other end is suspended downward, and then the limbs are connected to the horizontal and / or vertical portions ( Ascending / descending is carried out over (illustrated in FIG. 2). Since the net-type ladder 10 according to the present embodiment uses a rectangular wave-shaped net constituting unit having a horizontal portion, it is possible to stably hang a limb on the horizontal portion.

  FIG. 7 is an overall view showing a second embodiment of the net type ladder according to the present invention. The net type ladder 30 is configured by connecting a plurality of net configuration units 32-1 to n formed by bending a rigid wire into a triangular wave shape. n is connected by engaging the bent portions with each other, and a net 32 having a rhombus opening is formed.

  The size of the rhombus is such that the longitudinal length of the diagonal line is, for example, 20 to 60 cm, preferably 30 to 45 cm, and the horizontal length of the diagonal line is, for example, about 15 to 30 cm, preferably about 15 to 20 cm. Is, for example, 10 to 30 cm, preferably 10 to 25 cm.

  As shown in FIG. 8, the net constituting units 32-1 to 32-n are formed by bending a wire 31 in a triangular wave shape (zigzag shape). The bent troughs and crests of the wire rod are connected so as to engage with the crests and troughs of the adjacent net constituting unit. Both ends of the wire 31 are formed into ring-shaped knots 34a and 34b, respectively, and as shown in FIG. 7, any one of the net constituting units 32-1 to 32-n adjacent when the net constituting unit is connected. It is combined with both ends of. As the wire 31, a wire similar to that described in the first embodiment can be used.

  As shown in FIG. 7, the net type ladder 30 of the present embodiment is provided with a plurality of horizontal ropes 38 extending in a substantially horizontal direction in the suspended state. A plurality of horizontal ropes 38 are provided at a predetermined interval in the vertical direction, and each horizontal rope 38 is connected to the net 32 at both ends thereof. The user of the net-type ladder 30 can climb up and down safely by placing his / her limbs on the horizontal rope 38 as well as the mesh of the net 32. The space | interval of each horizontal rope 38 is 20-50 cm, for example. As the horizontal rope 38, the wire 11 described in the first embodiment, a metal wire, or the like can be used. Such a horizontal rope can also be provided in the net-type ladder 10 of the first embodiment.

  Similarly to the first embodiment, the net-type ladder 30 according to the present embodiment can be structurally bent at the engaging portion and can be wound. Therefore, the net-type ladder 30 is excellent in storage and portability.

  The net-type ladder of the present invention can be suitably used for work at home or construction site, or as an emergency escape escape device.

  FIG. 9 is an explanatory view showing a case where the net type ladder 10 of the first embodiment shown in FIG. 1 is used as an emergency escape evacuation device.

  When used as an emergency escape evacuation device, the net-type ladder 10 is normally stored on the balcony or indoor window on the floor of the building, and one end of the net is suspended from the floor in the event of an emergency such as a fire. It is used in the expanded state.

  In the normal storage state, the winding state or the shortened state shown in FIGS. And in the event of an emergency such as a fire or an earthquake, the above-described winding state or shortened state is solved and the robot is suspended in the ground direction.

  One end (upper end of the floor) of the net ladder 10 is fixed to the stored floor at least during use, and the other end on the ground side is set as a free end during deployment, or on the ground The fixed end is connected to the fixed body arranged. In the illustrated example, an example in which the fixed body 52 is fixed is shown.

  As the fixed body, it is possible to use a heavy pedestal or the like that does not move due to the load when the escape person gets off the net type ladder 10. Alternatively, a connecting fixture that can be connected to the ground-side end portion of the net-type ladder 10 is provided in advance on the ground, and the fixing fixture is connected to the ground-side end portion of the net-type ladder at the time of use. It is good.

  In the case of a fixed end, as shown in the figure, it is preferably suspended so as to incline toward the opposite side of the building toward the ground. Thereby, even if an escape person removes limbs, it can prevent falling to the ground as it is.

  Moreover, when using the net | network type ladder 10 of this invention as an emergency escape escape apparatus, it is preferable that the fireproof smoke-proof sheet | seat (not shown) is provided. The fireproof and smokeproof sheet is provided in parallel with the net body 12 so as to be disposed on the building side in the suspended state of the net body 12 (see FIG. 1). By providing the fireproof smokeproof sheet, it is possible to prevent the escape person from sucking smoke or coming into contact with the flame.

  A fire-resistant sheet can be used as the fire-proof and smoke-proof sheet. As a sheet | seat which has fire resistance, the textile-like sheet | seat which uses glass fiber and a polyamide fiber is mentioned, for example. The fireproof and smokeproof sheet is preferably set to have the same width and length as the net body 12.

  The net type ladder of the present invention can be used not only for such an emergency escape evacuation device but also for various applications. For example, it can be used for ascending / descending on a steep slope in a mountain, ascending / descending on a construction site, or work in a high place of a house.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. In the above-described example, a wire bent into a rectangular wave shape or a triangular wave shape is shown. It may be a mesh body configured.

10 Net-type ladder (first embodiment)
11 Wire rods 12-1 to 13-n Net constituting unit 13a to d Bending portion 14a, 14b Insertion portion 16a, 16b, 16c, 16d Vertical portion 18a, 18b, 18c Horizontal portion 21 Strand 30 Net type ladder (second embodiment Form)
31 Wire material 32 Net body 32-1-n Single-piece | unit 34a for net structure, 34b Knot 38 Horizontal rope 52 Fixed body

Claims (6)

A plurality of net configuration units formed by bending a rigid wire into a wave shape are connected in series,
The connection is performed so that adjacent net constituting single bodies are engaged with each other at the bent portions to form a long net body,
The mesh has a size that allows limbs to be hung,
At the time of use, one end in the length direction of the mesh body is fixed, the other end is suspended downward ,
The net type ladder according to claim 1, wherein the wave shape is a rectangular wave shape . The unit for net configuration is
Having four vertical portions in the suspended state of the mesh body and three horizontal portions respectively positioned between the four vertical portions;
The net type ladder according to claim 1 , wherein an insertion portion for connecting to an adjacent net constituting unit is provided at both ends of the wire. The net-type ladder according to claim 1 or 2 , wherein a plurality of horizontal ropes extending in a substantially horizontal direction in the suspended state are provided on the net body at predetermined intervals. . The wire has a tensile net type ladder according to any one of claim 1 to 3, strength is characterized by a plurality of twisted and becomes twisted strands of 400~2000N / mm ^2. The net-type ladder according to any one of claims 1 to 4 , wherein the net-type ladder is an emergency escape evacuation device that is stored on a floor of a building in a normal state and is suspended from the floor in an emergency. The net type ladder according to claim 5 , wherein a fireproof and smokeproof sheet is provided on the building side of the net body in a state where the net body is suspended.

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