JP2006052603A - Expansible structure, foldable ladder, foldable support, foldable instrument, and foldable pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansible structure having simple construction for achieving sufficient strength, a foldable ladder, a foldable support, foldable instrument and a foldable pipe using the expandable structure. <P>SOLUTION: The expansion structure 2 comprises a pair of pantograph multistage expansion arms 10, 10 aligned in their expanding directions and arranged at a preset space in the directions of intersecting the expanding directions, a connection member 14 bridged and connected between the stages of both expansion arms 10, 10, and slidable multistage expansion arms 20, 20 arranged along the expanding directions of the pantograph multistage expansion arms, the stages of the pantograph multistage expansion arms 10, 10 being turnably mounted on the stages of the slidable multistage expansion arms 20, 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stretchable structure that can be extended and shortened. The present invention proposed at the same time relates to a folding ladder, a folding support base, a folding instrument and a folding pipe using the telescopic structure.

Recently, detached houses often adopt 2-story and 3-story structures to increase the total floor space, and apartments and apartments are also becoming increasingly high-rise.
Condominiums and apartments are obliged to install evacuation devices to cope with disasters such as fires, but it is rare that evacuation devices are installed in detached houses.

Therefore, an evacuation ladder has been developed that is usually stored in a dwelling unit and can be deployed and used in the event of a disaster such as a fire.
Patent Document 1 discloses such an evacuation ladder. The evacuation ladder disclosed in Patent Document 1 is formed by connecting the steps arranged one above the other with a connecting plate through hinges so that a ladder shape can be formed at the time of extension, and a plurality of steps can be overlapped and folded. It is made into the composition.
In other words, the evacuation ladder disclosed in Patent Document 1 can be folded and stored compactly when not in use, and can be deployed and used as an evacuation ladder when a disaster occurs.
JP 2002-360716 A

  However, since the evacuation ladder disclosed in Patent Document 1 has a structure in which a plurality of steps are fixed with a plate through hinges, the steps move relatively to the left and right, like an ordinary ladder. It was not equipped with rigidity. For this reason, the evacuation ladder disclosed in Patent Document 1 is difficult to climb up and down, and although it is highly storable, it is not suitable for evacuation requiring emergency, so improvement has been desired.

Moreover, unlike the problem of such an evacuation ladder, many of the appliances used in daily life have a configuration in which a supported object is attached to the end of a long rod.
For example, a net used for collecting insects has a structure in which a net is attached to the tip of a rod. The headphone has a structure in which a phone pad including a headphone speaker is attached to both ends of a curved frame.

  However, such instruments such as insect collection nets and headphones require a lot of space for storage due to the large length of rods and frames even when not in use, and development of instruments with improved storage properties. Was waiting.

  This invention is proposed in view of the said situation, and it aims at providing the expansion-contraction structure which can ensure sufficient intensity | strength with a simple structure. Another object of the present invention proposed at the same time is to provide a folding ladder, a folding support base, a folding instrument and a folding pipe using the telescopic structure.

  The invention according to claim 1 proposed to achieve the above object is that a pair of pantograph-type multistage telescopic arms are arranged with a predetermined interval in a direction crossing the expansion / contraction direction with the expansion / contraction direction aligned. It is the expansion-contraction structure which bridged and connected the connection member between each step | level of an arm.

  According to the present invention, when a pair of pantograph-type multistage telescopic arms are fully extended, a pair of substantially linear arms are formed, and the substantially linear arms are connected by a plurality of connecting members. Further, when the pair of pantograph-type multistage extendable arms are completely reduced, the folded pantograph-type multistage extendable arms are connected to each other by a connecting member.

That is, according to the present invention, when the elastic structure is extended, the connecting member is bridged between a pair of substantially linear arms, and when the elastic structure is reduced, the structure is folded to reduce the bulk. It becomes a state.
Therefore, a pair of pantograph-type multi-stage telescopic arms and a connecting member are made of a rigid metal or the like to form a rigid ladder shape when extended, and a stretchable structure that can be folded and reduced in volume when reduced. It becomes possible.

  According to a second aspect of the present invention, in the telescopic structure according to the first aspect, a pair of pantograph-type multistage telescopic arms are arranged along the same plane.

  Here, when arranging a pair of pantograph-type multi-stage telescopic arms, the deployment surface of each pantograph-type multi-stage telescopic arm is arranged substantially in parallel with each other, and the development surface of each pantograph-type multi-stage telescopic arm is on the same plane. It is possible to adopt a configuration that is arranged along.

  According to the present invention, the latter configuration, that is, the configuration in which the development surface of each pantograph-type multistage telescopic arm is arranged along the same plane, is connected by the connecting member when the telescopic structure is reduced. The pair of pantograph-type multistage telescopic arms thus formed can be folded into a substantially flat shape. Thereby, the folded shape can be flattened, and the bulk at the time of reduction can be further reduced.

  According to a third aspect of the present invention, in the stretchable structure according to the first or second aspect, a slide-type multistage telescopic arm is arranged along the stretch direction of the pantograph-type multistage telescopic arm, and the pantograph-type multistage telescopic arm is provided. A plurality of steps including at least the steps at both ends in the extension / contraction direction are rotatably attached to the corresponding steps of the slide-type multi-stage extension arm.

  According to the present invention, when a pair of slide-type multistage telescopic arms are extended, the pantograph-type multistage telescopic arms are also extended, and conversely, when the slide-type multistage extendable arms are reduced, the pantograph-type multistage telescopic arms are also followed. Reduced.

  Therefore, when the telescopic structure is extended, the sliding multi-stage telescopic arm is extended along the pantograph multi-stage telescopic arm extended linearly, and the pantograph multi-stage telescopic arm is reinforced by the sliding multi-stage telescopic arm. . Thereby, it becomes possible to further improve the bending rigidity in the longitudinal direction when the elastic structure is extended.

In the present invention, it is possible to adopt a configuration in which only the steps at both ends of the pantograph-type multi-stage telescopic arm are rotatably attached to the corresponding stages of the slide-type multi-stage telescopic arm.
According to this configuration, the slide-type multistage telescopic arm can be arranged along the pantograph-type multistage telescopic arm while simplifying the structure, and the bending rigidity in the longitudinal direction when the telescopic structure is extended can be improved. .

Further, a configuration is adopted in which three or more stages including both ends of the pantograph type multi-stage telescopic arm, or all stages of the pantograph type multi-stage telescopic arm are rotatably attached to the corresponding stage of the slide type multi-stage telescopic arm. be able to.
According to this configuration, each stage of the pantograph-type multi-stage telescopic arm expands and contracts in conjunction with each stage of the slide-type multi-stage telescopic arm, and the bending rigidity in the longitudinal direction when the telescopic structure is extended further improves.

In the present invention, the slide-type multistage telescopic arm can take various configurations.
For example, a configuration in which a plurality of cylindrical bodies whose outer diameters are sequentially reduced and nested is integrated, such as a telescopic rod antenna.
Moreover, it is also possible to adopt a configuration in which adjacent arms of each stage are engaged with each other so as to be movable in the expansion / contraction direction.

  In the present invention, it is also possible to provide two pairs of pantograph-type multistage extendable arms connected by a connecting member between a pair of slide-type multistage extendable arms. According to this configuration, it is possible to further improve the bending rigidity in the longitudinal direction when the elastic structure is extended.

  According to a fourth aspect of the present invention, a pair of slide-type multi-stage telescopic arms are arranged at predetermined intervals in a direction intersecting the telescopic direction with the same direction of expansion and contraction, and along the direction of expansion and contraction of one slide-type multi-stage telescopic arm. A plurality of pantograph-type multi-stage telescopic arms including a plurality of stages including at least both ends of the telescopic direction are rotatably attached to corresponding stages of one slide-type multi-stage telescopic arm, and the pantograph-type multi-stage telescopic arm and the other slide It is the expansion-contraction structure which bridged and connected the connection member between each step | level of a type | formula multistage expansion-contraction arm.

According to the present invention, when the telescopic structure is extended, a substantially linear pantograph multistage telescopic arm is positioned along one of the pair of slide-type multistage telescopic arms, and the substantially linear pantograph multistage telescopic arm and the other It becomes a ladder shape in which a connecting member is bridged between the slide type multi-stage telescopic arm.
In addition, when a pair of slide-type multistage telescopic arms is completely reduced, one reduced slide multistage telescopic arm and the folded pantograph multistage telescopic arm are connected to the other slide type multistage telescopic arm by a connecting member. It becomes.

  Therefore, by making the sliding multistage telescopic arm, pantograph multistage telescopic arm and connecting member with rigid metal, etc., it becomes a rigid ladder shape when extended, and it can be folded when reduced to reduce the bulk A body can be formed.

  In particular, when the telescopic structure is extended, the pantograph-type multi-stage telescopic arm that is linearly extended along one slide-type multi-stage telescopic arm is positioned, and the pantograph-type multi-stage telescopic arm is reinforced by the slide-type multi-stage telescopic arm. The Thereby, it becomes possible to improve the bending rigidity of the longitudinal direction at the time of expansion | extension of an elastic structure.

In the present invention, it is possible to adopt a configuration in which only the steps at both ends of the pantograph-type multi-stage telescopic arm are rotatably attached to the corresponding stages of the slide-type multi-stage telescopic arm.
According to this configuration, the slide-type multistage telescopic arm can be arranged along the pantograph-type multistage telescopic arm while simplifying the structure, and the bending rigidity in the longitudinal direction when the telescopic structure is extended can be improved. .

Further, a configuration is adopted in which three or more stages including both ends of the pantograph type multi-stage telescopic arm, or all stages of the pantograph type multi-stage telescopic arm are rotatably attached to the corresponding stage of the slide type multi-stage telescopic arm. be able to.
According to this configuration, each stage of the pantograph-type multi-stage telescopic arm expands and contracts in conjunction with each stage of the slide-type multi-stage telescopic arm, and the bending rigidity in the longitudinal direction when the telescopic structure is extended further improves.

In the present invention, it is also possible to provide two systems of pantograph type multistage extendable arms provided with a connecting member between a pair of slide type multistage extendable arms. According to this structure, the bending rigidity of the longitudinal direction at the time of expansion | extension of an expansion-contraction structure can be improved further.
When two systems of pantograph-type multistage telescopic arms with connecting members are provided, by arranging each system symmetrically with respect to the expansion / contraction direction of the expansion / contraction structure, the bending rigidity in the longitudinal direction when the expansion / contraction structure is extended can be increased. It is made uniform and the strength can be further improved.

  According to a fifth aspect of the present invention, the slide-type multistage telescopic arms are arranged at the apexes of the polygon so that the directions of expansion and contraction are aligned, and the slide-type multistage telescopic arms are adjacent to each other. It is the elastic structure which formed each elastic structure.

Here, the polygon referred to in the present invention includes regular polygons such as regular triangles, squares, regular pentagons, and rhombuses.
According to the present invention, the stretchable structure can be made into a three-dimensional structure by forming each of the stretchable structures according to claim 3 between the slide-type multistage stretchable arms positioned at the apex of the polygon. . Thereby, it becomes possible to remarkably improve the bending rigidity in the longitudinal direction when the elastic structure is extended.

  According to a sixth aspect of the present invention, in the telescopic structure according to the third or fourth aspect, the slide type multistage telescopic arm is curved with a predetermined radius of curvature.

  According to the present invention, an arched arm is formed when the sliding multi-stage telescopic arm is extended. As a result, when the telescopic structure is extended, the pantograph-type multi-stage telescopic arm also bends in an arch shape along the slide-type multi-stage telescopic arm, thereby forming an elastic structure that can be extended into an arch shape and can be reduced. It becomes possible.

  The invention according to claim 7 is a telescopic structure in which a connecting member for fixing the multistage telescopic arm at an intermediate position during expansion and contraction is detachably provided at each stage of the pantograph type multistage telescopic arm.

  Here, the pantograph type multi-stage telescopic arm becomes a substantially linear arm when fully extended, and each stage is folded when fully contracted. Therefore, by fixing the pantograph multistage telescopic arm in the middle between expansion and contraction, the pantograph multistage telescopic arm exhibits a zigzag state.

According to the present invention, by attaching a connecting member to each stage of the pantograph type multi-stage telescopic arm, the pantograph type multi-stage telescopic arm is fixed in a zigzag state. A shape is formed.
Moreover, it becomes possible to fold a pantograph-type multistage telescopic arm by removing the connecting member.

  In the present invention, it is also possible to adopt a configuration in which pantograph-type multistage telescopic arms are overlapped. According to this configuration, it is possible to further improve the bending rigidity in the longitudinal direction when the elastic structure is extended.

  The invention described in claim 8 is a foldable ladder formed of the stretchable structure according to any one of claims 1 to 7.

All the stretchable structures of the present invention described above have a ladder shape with a connecting member as a foothold when extended, and have sufficient rigidity in the longitudinal direction. In addition, the above-described elastic structure of the present invention can be reduced and folded.
This makes it possible to form a foldable ladder that can be used as a ladder that is elongated and rigid when in use and can be folded and stored compactly when not in use.

In the present invention, a folding ladder using only one elastic structure according to any one of claims 1 to 7, or a plurality of the elastic structures according to any one of claims 1 to 7. Linked folding ladders can also be formed.
It is also possible to form a foldable ladder in which a plurality of different elastic structures according to any one of claims 1 to 7 are connected.

  The invention according to claim 9 is a foldable support base formed of the stretchable structure according to any one of claims 1 to 7.

Here, the support base referred to in the present invention includes a base on which a person climbs and works and a base for fixing a supported object.
As described above, since the stretchable structure of the present invention exhibits a ladder shape when extended, the stretchable structure can be used as a support base.
For example, by providing in advance a fixing structure for fixing the object to be supported to the elastic structure, and providing a fixing structure for fixing the object to the housing (fixing object) in the elastic structure. An object can be easily fixed to the housing.

Specifically, it is possible to form a support base for fixing a supported object such as a solar panel or a solar water heater installed on the roof of the dwelling unit to the roof that is a casing.
According to the foldable support stand of the present invention, it can be folded and moved compactly and transported, and it can be easily unfolded during use to reliably support the object to be supported.

In this invention, the folding-type support stand using only one expansion-contraction structure of any one of Claims 1 thru | or 7, or the expansion-contraction structure of any one of Claims 1 thru | or 7. A plurality of foldable support bases connected to each other can be formed.
It is also possible to form a foldable ladder in which a plurality of different elastic structures according to any one of claims 1 to 7 are connected.

  Invention of Claim 10 is a foldable instrument formed using the elastic structure of any one of Claims 1 thru | or 7, Comprising: At the one end or both ends of the expansion-contraction direction of the said expansion-contraction structure It is set as the structure to which a to-be-supported object is attached.

As described above, the stretchable structure of the present invention has a long ladder shape when extended, and can be folded compactly when reduced.
Therefore, by applying the stretchable structure of the present invention to various instruments, the stretchable structure can be extended to express the original function of the instrument when in use, and the stretchable structure can be contracted and compactly folded when not in use. it can. This makes it possible to form a foldable instrument that can be compactly accommodated while exhibiting the original functions of various instruments.

  The invention according to claim 11 is the folding instrument according to claim 10, wherein the object to be supported is selected from an insect collecting net, a fish catching net, a life buoy, a headphone, and glasses. It is configured as one.

The present invention specifically limits the folding instrument according to claim 10.
In other words, the insect collecting net and the fish catching net have a structure in which a net is attached to one end in the expansion / contraction direction of the expansion / contraction structure of the present invention, so that the extended expansion / contraction structure functions as a rod when used. It can be used as a collection net or a fish catching net. Further, when not in use, the elastic structure can be contracted and compactly folded.
Moreover, it becomes possible to comprise the lifebuoy which can be folded by taking the structure which attached the floating ring to the end of the expansion-contraction direction of the expansion-contraction structure of this invention.

  Further, by adopting a structure in which a phone pad including a headphone speaker is attached to both ends in the extension / contraction direction of the arch-shaped extension / contraction structure according to the present invention, the extension / contraction structure is extended in use to follow the head shape. The headphone can be bent and compactly folded when not in use.

  A twelfth aspect of the present invention is a foldable pipe formed by using the stretchable structure according to the fifth aspect, and has a stretchable sheath around the stretchable structure over the entire length in the extension direction. The structure is covered with wood.

As described above, since the stretchable structure according to claim 5 is a three-dimensional structure, the interior surrounded by the jacket material is covered by covering the periphery of the stretchable structure over the entire length in the extending direction. Can function as a pipe.
Therefore, according to the stretchable pipe of the present invention, the stretchable structure can be extended to function as a long pipe when in use, and can be folded compactly when not in use.

  The stretchable pipe of the present invention can be applied to various instruments. For example, when applied to a suction pipe of a vacuum cleaner, it can be folded more compactly than before, and the storage property can be further improved.

According to the first to seventh aspects of the present invention, it is possible to provide a stretchable structure that can be expanded to be a long rigid structure when in use, and can be contracted and compactly folded when not in use.
According to the invention described in claim 8, by using the stretchable structure according to any one of claims 1 to 7, the ladder is elongated at the time of use and has a long rigidity, and is reduced and compacted when not in use. A folding ladder that can be folded can be provided.
According to the ninth aspect of the present invention, by using the elastic structure according to any one of the first to seventh aspects, the support base is elongated when used and has a long rigidity, and is compacted and compacted when not in use. It is possible to provide a foldable support base that can be folded.
According to the invention described in claims 10 and 11, it is possible to provide a foldable instrument having improved storage performance by using the stretchable structure according to claims 1 to 7.
According to the twelfth aspect of the present invention, by using the stretchable structure according to the first to seventh aspects, a foldable pipe with improved storability can be provided.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the expansion-contraction structure shown by the following embodiment forms the folding ladder of this invention as it is. Therefore, the same reference numerals are given to the telescopic structure and the folding ladder in each embodiment.

(First embodiment)
Fig.1 (a)-(d) is a top view which shows the structure and expansion-contraction state of the expansion-contraction structure (foldable ladder) 1 which concern on 1st Embodiment of this invention.
As shown in FIG. 1 (a), the stretchable structure 1 of the present embodiment arranges a pair of pantograph-type multistage stretchable arms 10 and 10 at a predetermined interval in a direction intersecting the stretch direction with the stretch direction aligned. It has a structure in which a connecting member 14 is bridged and connected between the respective stages of both the telescopic arms 10 and 10.

  The pantograph-type multistage telescopic arm 10 is formed by combining four first arms 11, two second arms 12, and two third arms 13, as shown in FIG. The second arm 12 is substantially half the length of the first arm 11, and the third arm 13 has a shape in which a handle 13a is provided at one end of the first arm.

The pantograph multistage telescopic arm 10 has the following configuration. In other words, two sets of the first arms 11, 11 that are pivotally attached in an X shape are arranged vertically in the vertical direction (the vertical direction in FIG. 1 a). The ends of the are fixed so as to be rotatable. Further, the end portions of the second arm 12 and the third arm 13 are respectively rotatably fixed to the release side end portion of the first arm 11, and the other end portion of the second arm 12 is substantially centered on the third arm 13. It is formed so as to be pivotally fixed to the part.
Note that the pantograph-type multistage telescopic arm 10 employed in the present embodiment has a three-stage configuration (the number of rhombus-shaped stages is three) formed by first to third arms.

  The telescopic structure 1 of the present embodiment is formed using two such pantograph-type multistage telescopic arms 10. That is, as shown in FIG. 1 (a), a pair of multi-stage telescopic arms 10 and 10 are arranged such that the handle 13a of the third arm 13 is located on the outside with the direction of expansion and contraction aligned, and each rhombus-shaped stage. The connecting members 14 are rotatably connected between the inner side ends of the first arm 11.

  In the present embodiment, the locking member 15 is rotatably fixed in the vicinity of the handle 13a of one third arm 13, and the locking member is positioned in the vicinity of the handle 13a of the other opposing third arm 13. 15 is provided with a locking portion 13b for engaging 15.

The stretchable structure 1 having such a configuration can be stretched and contracted very easily by the following procedure.
First, in FIG. 1 (a), the upper and lower handles 13a, 13a of the pantograph-type multi-stage telescopic arms 10, 10 are pressed in a direction to bring them close to each other. Then, the connection point between the third arm 13 and the first arm 11 and the connection point between the second arm 12 and the first arm 11 are moved away from each other in the left-right direction. The second arm 12 overlaps in the left-right direction, and the X-shaped first arms 11, 11 also rotate and overlap in the left-right direction.

Thereby, as shown in FIG. 1 (b), the first to third arms 11, 12, 13 of the pantograph type multi-stage telescopic arms 10, 10 are folded and the connecting members 14 are close to each other, so that the telescopic structure is provided. 1 is reduced in the vertical direction and folded (reduced state).
In the folded state, the left and right lengths of the telescopic structure 1 are approximately twice the length of the third arm 13 plus the length of the connecting member 14 as shown in FIG. The upper and lower lengths are reduced and become extremely compact.

  On the other hand, when the telescopic structure 1 is extended, the upper and lower handles 13a, 13a of the multistage telescopic arms 10, 10 are pulled away from each other in FIG. 1 (b). Then, the connection point of the third arm 13 and the first arm 11 and the connection point of the second arm 12 and the first arm 11 move so as to be close to each other in the left-right direction. The end connection point of the second end also moves so as to be close to each other, so that the extended state shown in FIG.

Further, when the upper and lower handles 13a, 13a are pulled away from each other, each pantograph-type multistage telescopic arm 10 further extends in the vertical direction as shown in FIG.
When the pantograph-type multistage telescopic arm 10 is fully extended, the third arm 13 and the second arm 12 overlap in the vertical direction (vertical direction in FIG. 1c) as shown in FIG. They overlap each other in the vertical direction. Thereby, each pantograph type multi-stage telescopic arm 10, 10 becomes a linear arm.

Then, by locking the locking hole 15a of the locking member 15 with the locking portion 13b of the third arm 13, the extension of the stretchable structure 1 is completed as shown in FIG.
As shown in FIG. 1D, the stretchable structure (foldable ladder) 1 that has been extended is connected between a pair of pantograph-type multistage telescopic arms 10 and 10 and a locking member 15. Becomes a bridged shape, so-called ladder shape.

  In the extended folding ladder 1, the pair of pantograph-type multistage telescopic arms 10 have rigidity, and the connecting member 14 and the locking member 15 also have rigidity. Therefore, by placing the handle 13a of the third arm 13 at the lower end against a ground such as the earth or a building, the ladder can be raised and lowered with the connecting member 14 and the locking member 15 as a foothold.

  Moreover, since the folding ladder 1 of this embodiment latches between the upper and lower 3rd arms 13 by the locking members 15 and 15, it is a pantograph type multistage expansion-contraction by the load applied to the connection member 14 at the time of raising / lowering. The arm 10 is prevented from changing to a folded shape. Thereby, raising / lowering can be performed safely.

As described above, according to the telescopic structure (foldable ladder) 1 of the present embodiment, the pair of pantograph-type multistage telescopic arms 10 and 10 are simply connected by the connecting member 14 so that they can be extended during use. It functions as a rigid ladder and can be folded and stored compactly when not in use.
Thereby, the outstanding folding ladder 1 which reduced the storage space can be provided, and it becomes possible to respond immediately to the occurrence of a disaster.

  Note that, as described above, the folding ladder 1 of the present embodiment has high rigidity when extended, so that it can be used not only when a disaster occurs, but also for daily work such as wiping glass or painting.

(Second Embodiment)
2A to 2C are plan views showing a structure and a stretched state of the stretchable structure (foldable ladder) 2 according to the second embodiment.
The telescopic structure 2 of the present embodiment has a configuration in which a pair of sliding multistage telescopic arms 20 and 20 are added to the telescopic structure 1 (see FIG. 1) of the first embodiment. Accordingly, the same components are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 2A, the telescopic structure 2 of the present embodiment has a slide type multi-stage telescopic arm 20 arranged along the direction of extension of the telescopic arm 10 on the outside of each pantograph multi-stage telescopic arm 10, 10. The pantograph-type multi-stage telescopic arm 10 has a structure in which each stage of the slide-type multi-stage telescopic arms 20 and 20 is rotatably attached.

The pantograph type multi-stage telescopic arm 10 is a six-stage telescopic arm formed by combining nine first arms 11 and three second arms 12 as shown in FIG.
On the other hand, the slide-type multi-stage telescopic arm 20 is integrated by nesting six cylindrical arms of the first arm 21 to the sixth arm 26 whose outer diameters are sequentially reduced like a telescopic rod antenna. It has a structure.

  Among the connection points of the first arm 11 of the pantograph-type multi-stage telescopic arm 10, the six connection points of each stage adjacent to the slide-type multi-stage telescopic arm 20 are respectively the first arms 21 to 21 of the slide-type multi-stage telescopic arm 20. The sixth arm 26 is fixed to the upper end of the sixth arm 26 so as to be rotatable.

Further, the telescopic structure 2 of the present embodiment has a locking member 27 rotatably fixed to the lower end of the first arm 21 of one sliding multi-stage telescopic arm 20 and the other sliding multi-stage telescopic arm facing each other. The 20 first arms 21 are provided with locking portions 21a.
Further, a locking member 27 is rotatably fixed to a connection point of the sixth arm 26 of one slide type multistage telescopic arm 20 and is locked to the sixth arm 26 of the other sliding type multistage telescopic arm 20 facing. A portion 26a is provided.

The stretchable structure 2 having such a configuration can be stretched and contracted very easily by the following procedure.
First, in FIG. 2A, the slide-type multistage telescopic arms 20, 20 are pressed from above and below so as to be reduced. Then, following the reduction of the slide type multi-stage telescopic arm 20, each stage of the pantograph type multi-stage telescopic arm 10 is folded, and as shown in FIG. 2B, the stage is reduced to the pantograph type multi-stage telescopic arm 10 folded. The folding is completed in a state where the slide type multistage telescopic arm 20 is moved.

  The folded stretchable structure 2 has a left and right length that is approximately twice the length of the first arm 11 of the pantograph type multistage extendable arm 10, and the length of the connecting member 14 and the slide type multistage extendable arm 20. The length of the slide type multi-stage telescopic arm 20 is reduced to be extremely compact.

  On the other hand, when the telescopic structure 2 is extended, in FIG. 2B, the slide-type multistage telescopic arms 20 and 20 are pulled up and down so as to extend. Then, following the expansion of the slide-type multistage extendable arms 20, 20, the pantograph type multistage extendable arms 10, 10 are also extended to reach the state of FIG.

Further, by completely extending each slide type multistage extendable arm 20, 20, the pantograph type multistage extendable arm 10, 10 is in a linear fully extended state as shown in FIG.
Then, the locking hole 27a of the locking member 27 at the lower end is locked to the opposing locking portion 21a, and the locking hole 27a of the locking member 27 at the upper end is locked to the opposing locking portion 26a. The extension of the stretchable structure 2 is completed as shown in FIG.

  As shown in FIG. 2 (c), the stretchable structure (foldable ladder) 2 that has been extended is slid along the pair of pantograph-type multistage extendable arms 10 and 10, and slide-type multistage extendable arms 20 and 20 are formed. And a ladder shape in which the connecting member 14 and the locking member 27 are bridged between the pantograph-type multistage telescopic arms 10 and 10.

  In the extended folding ladder 2, in addition to the pair of pantograph type multistage extendable arms 10, the pair of slide type multistage extendable arms 20 has high bending rigidity, and the connecting member 14 and the locking member 27 also have rigidity. Accordingly, the ladder can be moved up and down using the connecting member 14 and the locking member 27 as a foothold.

  Further, since the folding ladder 2 of the present embodiment locks the upper and lower sides of the slide-type multi-stage telescopic arm 20 with the locking members 27, 27, the pantograph-type multi-stage telescopic arm is applied by the load applied to the connecting member 14 when moving up and down 10 is prevented from changing to a folded shape. Thereby, it becomes possible to raise and lower safely.

Thus, according to the telescopic structure (foldable ladder) 2 of the present embodiment, by adding the sliding multi-stage telescopic arm 20 to the pair of pantograph multi-stage telescopic arms 10, 10 connected by the connecting member 14. When used, it functions as a ladder having high bending rigidity and can be folded and stored compactly when not in use.
Thereby, the outstanding folding ladder 2 which reduced the storage space can be provided, and it becomes possible to respond immediately to the occurrence of a disaster.

Here, the telescopic structure (foldable ladder) 2 of the present embodiment employs a structure in which each stage of the pantograph multistage telescopic arm 10 is rotatably attached to each corresponding stage of the slide multistage telescopic arm 20. However, it is possible to adopt a simplified structure.
FIGS. 3A to 3C are plan views showing a structure and a stretched state of a stretchable structure 2a obtained by simplifying the stretchable structure 2 (see FIG. 2).

  As shown in FIG. 3A, the telescopic structure 2a has a structure in which only the steps at both ends of the pantograph type multistage telescopic arm 10 are rotatably attached to the corresponding stages of the slide type multistage telescopic arms 20, 20. Have.

The pantograph-type multistage telescopic arm 10 is a telescopic arm formed by combining ten first arms 11 and two second arms 12 as shown in FIG.
On the other hand, the slide type multi-stage telescopic arm 20 has the same basic structure as that adopted for the telescopic structure 2 (see FIG. 2).

The first arms 11, 11 of the pantograph-type multistage extendable arm 10 at both ends in the extension direction (upper and lower ends in FIG. 3 a) are respectively turned around the sixth arm 26 and the first arm 21 of the slide type multistage extendable arm 20. It is fixed freely.
In other words, the telescopic structure 2a has a structure in which only the steps at both ends of the pantograph type multi-stage telescopic arm 10 are rotatably attached to the steps at both ends of the sliding multi-stage telescopic arm 20, respectively.

  As shown in FIG. 3B, the telescopic structure 2a is made compact by folding each slide-type multistage telescopic arm 20, 20 so that each stage of the pantograph multistage telescopic arm 10 is folded. Can do.

Further, by fully extending each slide type multi-stage telescopic arm 20, 20, the slide type multi-stage telescopic arm is extended along a pair of pantograph type multi-stage telescopic arms 10, 10 which are linear as shown in FIG. The arms 20 and 20 are positioned, and a ladder shape is formed in which the connecting member 14 and the locking member 27 are bridged between the pantograph-type multistage telescopic arms 10 and 10.
Thereby, when used, it functions as a ladder having high bending rigidity and can be folded and stored compactly when not in use.

  In particular, the telescopic structure 2a has a structure in which only the steps at both ends of the pantograph type multi-stage telescopic arm 10 are rotatably attached to the steps at both ends of the slide type multi-stage telescopic arm 20 in a pantograph type multi-stage. There are no restrictions on the number of stages of the telescopic arm 10 and the number of stages of the sliding multi-stage telescopic arm 20. Thereby, the freedom degree of design of the expansion-contraction structure 2a is high.

By the way, in the said expansion-contraction structure 2 and 2a (refer FIG. 2, FIG. 3), it is also possible to take the structure which fits the both ends of the connection member 14 to the slide-type multistage expansion-contraction arm 20 at the time of expansion | extension.
4 (a) to 4 (c) show an elastic structure in which a structure in which both end portions of the connecting member 14 are fitted to the slide-type multistage elastic arm 20 at the time of extension is applied to the elastic structure 2 (see FIG. 2). It is explanatory drawing which shows 2b.

As shown in FIG. 4A, the telescopic structure 2b is provided with openings 21b, 22b,... Near the upper ends of the arms 21, 22, 23,. , 23 are also provided with openings 22c, 23c,.
These openings 21b, 22b,... And openings 22c, 23c,... Are opened toward the side where the connecting member 14 is located, and the size thereof is substantially equal to the cross-sectional shape of the connecting member 14.
The stretchable structure 2b has a structure in which the connecting member 14 is extended in the longitudinal direction.

  When the sliding multi-stage telescopic arm 20 is extended in the state shown in FIG. 4A, such a telescopic structure 2b has openings provided in the arms 21, 22, 23,... As shown in FIG. 21b, 22b,... And the openings 22b, 23b are close to each other, and the longitudinal end portion 14b of each connecting member 14 is close to the openings 21b, 22b,.

  When the sliding multistage telescopic arm 20 is fully extended, the openings 21b, 22b,... And the openings 22c, 23c,. The long end portion 14b of the connecting member 14 is fitted into the openings 21b, 22b,.

Therefore, at the time of complete extension, the arms 21, 22, 23,... Of the slide-type multistage telescopic arm 20 are in a locked state in which the contraction is prevented by the inserted connecting member 14, and both ends of the connecting member 14 slide. A multi-stage telescopic arm 20 is supported. Thereby, the load bearing strength of the connecting member 14 is remarkably improved, and the sliding multistage telescopic arm 20 and the pantograph multistage telescopic arm 10 can be prevented from being reduced by the connecting member 14.
Therefore, it is possible to remarkably increase the load bearing strength when the stretchable structure 2b is extended, and it can be used as a folding ladder with improved safety.

  In addition, although the expansion | extension structure 2b applied the fitting structure which inserts the connection member 14 in the slide-type multistage expansion / contraction arm 20 in the said expansion / contraction structure 2 (refer FIG. 2), the said expansion / contraction structure 2a (refer FIG. 3). It is also possible to apply such a fitting structure.

By the way, it is also possible to adopt a structure in which the load-bearing strength at the time of extension of the stretchable structures 2 and 2a (see FIGS. 2 and 3) and the stretchable structure 2b (see FIG. 4) is further improved.
FIG. 5 (a) is an explanatory view showing the stretchable structure 2c in which the load bearing strength of the stretchable structure 2 (see FIG. 2) is improved, and FIG. 5 (b) is the resistance of the stretchable structure 2b (see FIG. 4). It is explanatory drawing which shows the expansion-contraction structure 2d which aimed at the improvement of load intensity | strength.

As shown in FIG. 5A, the telescopic structure 2c has openings 21d, 22d,... Near the upper ends of the arms 21, 22, 23,. .. Openings 22e, 23e,... Are provided in the vicinity of the lower end, and the openings 21d, 22d,... Overlap with and communicate with the openings 22e, 23e,. .
Further, the longitudinal end portion of the connecting member 14 is extended, and an opening 14c is provided at the extended portion.

  Further, a plurality of U-shaped locking pieces 17 or a plurality of E-shaped locking pieces straddling between the openings 21d, 22d,... Of the slide-type multistage telescopic arm 20 and the openings 14c of the connecting members 14. 18 is provided.

  As shown in FIG. 5 (a), such a stretchable structure 2c is configured such that after the sliding multistage telescopic arm 20 is fully extended, the locking piece 17 is attached to the openings 21d, 22d,. The connecting member 14 is fitted between the openings 14c (see the sliding multistage telescopic arm 20 on the right side of FIG. 5a).

  When the locking piece 17 is inserted, the sliding movement of the sliding multi-stage telescopic arm 20 in the expansion / contraction direction is locked, and each connecting member 14 is firmly fixed to the sliding multi-stage expansion / contraction arm 20 via the locking piece 17. . Thereby, the load bearing strength at the time of expansion | extension of the expansion-contraction structure 2c can be improved significantly.

When the locking piece 18 is used, as shown in FIG. 5A, after the sliding multi-stage telescopic arm 20 is completely extended, the locking piece 18 is opened to the openings 21d, 22d,. The connecting member 14 is fitted between the openings 14c. Then, the other end of the locking piece 18 is directed to the outer edge of the slide type multistage telescopic arm 20 (see the right side slide type multistage telescopic arm 20 side in FIG. 5a).
Thereby, like the case of the locking piece 17, it becomes possible to improve the load bearing strength when the elastic structure 2c is extended.

As shown in FIG. 5B, the telescopic structure 2d has an opening 21d in the vicinity of the upper end of each arm 21, 22, 23,... Of the slide-type multistage telescopic arm 20 in the telescopic structure 2b (see FIG. 4). Are provided in the vicinity of the lower ends of the arms 22, 23,... When the sliding multi-stage telescopic arm 20 is fully extended, the openings 21d, 22d,. 23e... Overlap each other and communicate with each other.
Further, an opening 14c is provided at the longitudinal end of the connecting member 14, and the opening 14c overlaps the openings 21d, 22d,.

  Further, a plurality of T-shaped locking pieces 19 inserted into the openings 21d, 22d,... Of the slide-type multistage telescopic arm 20, or the openings 21d, 22d,. A plurality of U-shaped locking pieces 17 straddling the outer edge of each step of the arm 20 are provided.

  As shown in FIG. 5 (b), such a stretchable structure 2d is configured such that after the slide-type multistage telescopic arm 20 is completely extended, the locking piece 19 is inserted into the openings 21d, 22d,. (See the slide type multi-stage telescopic arm 20 on the right side of FIG. 5b).

  When the locking piece 19 is inserted, the sliding multistage telescopic arm 20 slides in the direction of expansion and contraction, and each connecting member 14 is fixed to the sliding multistage telescopic arm 20 by the locking piece 19. Thereby, the load bearing strength at the time of expansion | extension of the expansion-contraction structure 2c can be improved significantly.

When the locking piece 17 is used, as shown in FIG. 5 (b), after the sliding multistage telescopic arm 20 is completely extended, the locking piece 17 is inserted into the openings 21d, 22d,. The other end is placed on the outer edge of the slide-type multistage telescopic arm 20. (Refer to the slide type multi-stage telescopic arm 20 on the right side in FIG. 5b).
Thereby, similarly to the case of the locking piece 19, it becomes possible to improve the load resistance strength when the elastic structure 2c is extended.

In the description of FIG. 5, the structure is such that a plurality of locking pieces 17 to 19, which are separate from the elastic structures 2 c and 2 d, are fitted. However, for example, it is also possible to adopt a configuration in which the locking pieces 17 (18, 19) are attached to the connecting members 14 so that the posture can be freely changed between the fitting posture and the releasing posture.
According to this configuration, there is no problem of losing the locking pieces 17 (18, 19), and the locking pieces 17 (18, 19) can be easily inserted by being moved to the insertion posture at the time of extension. It is possible to form the stretchable structures 2c and 2d having improved strength.

  In addition, for example, it is possible to prepare a locking member in which a plurality of locking pieces 17 (18, 19) are arranged in a bar, and to adopt a configuration in which the locking members are attached to the extended elastic structures 2d, 2d. It is.

Further, apart from the pantograph type multi-stage telescopic arm 10, the pantograph type multi-stage telescopic arm for locking, to which a plurality of locking pieces 17 (18, 19) are attached, can be freely changed between the fitting position and the releasing position. The structure attached to the connection member 14 can also be taken.
According to this structure, the extended pantograph-type multi-stage telescopic arm for locking can be moved to the insertion posture so that the locking pieces 17 (18, 19) can be easily inserted, and the elastic structure 2c with improved strength. , 2d can be formed.

(Third embodiment)
FIGS. 6A to 6C are plan views showing the structure and the stretched state of the stretchable structure (foldable ladder) 3 according to the third embodiment.
The elastic structure 3 of the present embodiment has a configuration in which a part of the elastic structure 2 of the second embodiment is deformed. Accordingly, the same components are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 6A, the telescopic structure 3 of the present embodiment removes the pantograph-type multistage telescopic arm 10 on the left side of the telescopic structure 2 (see FIG. 2) of the second embodiment, and connects the connecting member 14. Is directly connected to each stage of the left slide type multistage telescopic arm 20 so as to be freely rotatable.

  The telescopic structure 3 of the present embodiment can also be folded as shown in FIG. 6B by pressing from above and below so as to shorten the slide type multistage telescopic arms 20 and 20.

  The stretchable structure 3 in the folded state has a left and right length that is approximately the length of the first arm 11 of the pantograph-type multistage telescopic arm 10, the length of the connecting member 14, and the maximum outside of the slide-type multistage telescopic arm 20. The length of the slide-type multi-stage telescopic arm 20 is reduced to a very compact size.

Further, when the telescopic structure 3 is extended, in FIG. 6 (b), the sliding multi-stage telescopic arms 20 and 20 are pulled in the vertical direction so that each sliding multi-stage telescopic structure is extended as shown in FIG. 6 (c). While the arms 20 and 20 are fully extended, the pantograph-type multistage extendable arms 10 and 10 are in a linear and fully extended state.
Then, by locking the upper and lower locking members 27, 27, the extension of the stretchable structure 3 is completed as shown in FIG.

  As shown in FIG. 6 (c), the stretchable structure 3 (foldable ladder) 3 that has been fully extended has one slide-type multistage telescopic arm 20 positioned along a pantograph-type multistage telescopic arm 10 that is linear. The pantograph type multi-stage telescopic arm 10 and the other slide type multi-stage telescopic arm 20 have a ladder shape in which a connecting member 14 and a locking member 27 are bridged.

  Thus, according to the telescopic structure (foldable ladder) 3 of the present embodiment, the pantograph multistage telescopic arm 10 and the connecting member 14 are arranged between the pair of slide multistage telescopic arms 20, 20. According to the configuration, when used, it functions as a ladder having high rigidity and can be folded and stored compactly when not in use.

  In addition, although the expansion structure 3 of this embodiment employ | adopted the structure which attaches each step | level of the pantograph type multistage expansion / contraction arm 10 to each step | level of the slide type | mold multistage expansion / contraction arm 20, the expansion | extension structure 2a (refer FIG. 3). As described above, it is also possible to adopt a configuration in which only the steps at both ends of the pantograph type multistage extendable arm 10 are attached to the corresponding stages of the slide type multistage extendable arm 20.

Moreover, it is also possible to employ | adopt the insertion structure shown to the said elastic structure 2b (refer FIG. 4) to the elastic structure 3 of this embodiment.
Furthermore, it is also possible to employ | adopt the latching structure using the latching pieces 17-19 shown to the said elastic structure 2c, 2d (refer FIG. 5) to the elastic structure 3 of this embodiment.

(Fourth embodiment)
Here, in order to further improve the strength of the telescopic structure 3 of the third embodiment described above, another pantograph multistage telescopic arm 10 and a pair of sliding multistage telescopic arms 20 and 20 are provided. It is also possible to adopt a structure in which the connecting member 14 is arranged.
FIGS. 7A to 7D are plan views showing the structure and the stretched state of the stretchable structure 4 of the fourth embodiment having such a structure.

  As shown in FIG. 7A, the telescopic structure 4 includes a pantograph multi-stage telescopic arm 10 and a connecting member 14 between the slide-type multi-stage telescopic arms 20 and 20 of the telescopic structure 3 (see FIG. 6). The configuration is further added. That is, as shown in FIG. 7B, the pantograph type multistage extendable arm 10 and the connecting member 14 are arranged so as to overlap each other between the slide type multistage extendable arms 20 and 20.

The stretchable structure 4 can be folded into the same size as the stretchable structure 3 as shown in FIG. 7B.
When the telescopic structure 4 is extended, as shown in FIG. 7 (d), the pantograph-type multistage telescopic arms 10, 10 extending linearly along each of the pair of slide-type multistage telescopic arms 20, 20 are arranged. Thus, the bending rigidity in the longitudinal direction of the elastic structure 4 can be further improved.

  According to the stretchable structure (foldable ladder) 4 of the present embodiment, it can be compactly folded to the same size as the stretchable structure 3 described above, and in the longitudinal direction when extended compared to the stretchable structure 3. It becomes possible to further improve the bending rigidity.

  In the telescopic structure 4 of the present embodiment, only the steps at both ends in the telescopic direction of the pantograph multistage telescopic arm 10 correspond to the slide multistage telescopic arm 20 as in the telescopic structure 2a (see FIG. 3). It is also possible to adopt a configuration that attaches to a step.

Moreover, it is also possible to employ | adopt the insertion structure shown to the said elastic structure 2b (refer FIG. 4) to the elastic structure 4 of this embodiment.
Furthermore, it is also possible to employ | adopt the latching structure using the latching pieces 17-19 shown to the said elastic structure 2c, 2d (refer FIG. 5) to the elastic structure 4 of this embodiment.

(Fifth embodiment)
FIGS. 8A to 8C are plan views showing the structure and the stretched state of the stretchable structure (foldable ladder) 5 according to the fifth embodiment.
The stretchable structure 5 of the present embodiment has a simplified configuration of the stretchable structure 1 shown in the first embodiment. Accordingly, the same components are denoted by the same reference numerals, and redundant description is omitted.

The stretchable structure 5 is configured by using one pantograph-type multistage stretchable arm 10 and a connecting member 14 that are employed in the stretchable structure 1 (see FIG. 1).
The pantograph-type multistage telescopic arm 10 is a modification of the configuration adopted for the telescopic structure 1.

  In other words, the telescopic structure 1 (see FIG. 1) uses two second arms 12 and 12 for the pantograph type multistage telescopic arm 10, whereas in the present embodiment, as shown in FIG. Instead of the second arm 12, two third arms 13 and 13 are attached.

  In addition, a locking hole 14 a is provided at the end of the connecting member 14, and a locking portion 11 a is provided at a connection point between the first arms 11 and a connection point between the first arm 11 and the third arm 13. Fourteen locking holes 14a can be engaged with the locking portion 11a.

The telescopic structure 5 of the present embodiment can be folded as shown in FIG. 8B by pressing the upper and lower handles 13a of the pantograph type multi-stage telescopic arm 10 so as to approach each other.
The folded elastic structure 1 has a left and right length substantially equal to the length of the third arm 13 plus the length of the handle 13a, and the vertical length is shortened to be extremely compact.

  On the other hand, when the telescopic structure 5 is extended, the upper and lower handles 13a and 13a of the pantograph-type multistage telescopic arm 10 are pulled apart in the direction away from each other in FIG. Let it be in the extended state. Then, the locking holes 14a of the connecting members 14 are locked to the corresponding locking portions 11a, and the locking holes 15a of the locking members 15 are locked to the locking portions 13b of the third arm 13. The expanded state shown in FIG.

  In the extended telescopic structure 5, the pantograph-type multi-stage telescopic arm 10 is fixed in an intermediate state between a contracted state and a fully extended state to form a zigzag shape, and a connecting member 14 and a locking member 15 are provided at each stage of the zigzag shape. Presents an arranged shape.

Therefore, the extended telescopic structure 5 can be used as a ladder with the connecting member 14 and the locking member 15 as a foothold by standing the third arm 13, 13 at the lower end against the ground or a building. It is.
As described above, according to the telescopic structure (foldable ladder) 5 of the present embodiment, it can be used as a ladder by being stretched when in use, and can be folded and stored compactly when not in use. Is possible.

(Sixth embodiment)
Here, in order to further improve the strength of the expandable structure 5 of the fifth embodiment described above, it is possible to adopt a structure in which the pantograph-type multistage extendable arms 10 are arranged in a double manner.
FIGS. 9A and 9B are plan views showing the structure and the stretched state of the stretchable structure 6 of the sixth embodiment having such a structure.

As shown in FIG. 9 (a), the stretchable structure 6 is formed by superimposing the pantograph-type multistage extendable arms 10 and 10 employed in the stretchable structure 1 (see FIG. 1), and the connecting member 14 is one of the pantograph-type multistage extendable / retractable elements. The arm 10 has a structure that is rotatably fixed to each stage of the arm 10.
In other words, the telescopic structure 6 has a structure in which the bending rigidity in the longitudinal direction at the time of extension is improved by overlapping the pantograph-type multi-stage telescopic arm 10 twice.

The stretchable structure 6 of the present embodiment can be folded and extended to the same size as the stretchable structure 5 (see FIG. 8).
That is, according to the stretchable structure (foldable ladder) 6 of the present embodiment, it can be folded in the same size as the stretchable structure 5 in a compact manner, and the length of the stretched structure 5 is longer than that of the stretchable structure 5. It becomes possible to improve the bending rigidity in the direction.

By the way, although all the expansion-contraction structures 1-6 shown in the said 1st-6th embodiment formed the connection member 14 with the elongate flat plate material, it is also possible to use the connection member different from flat plate shape. is there.
FIGS. 10A and 10B are perspective views showing stretchable structures 2 ′, 2 ″ obtained by applying connecting members having different shapes to the stretchable structure 2 shown in the second embodiment (see FIG. 2). It is.

  The stretchable structure 2 ′ in FIG. 10A has a configuration that employs a connecting member 14 ′ and a locking member 15 ′ formed by bending a flat plate material. Further, the stretchable structure 2 ″ in FIG. 10B has a configuration employing a connecting member 14 ″ and a locking member 15 ″ obtained by bending a flat plate material into a polygonal line shape.

  According to such a telescopic structure (foldable ladder) 2 ′, 2 ″, even when the sliding multistage telescopic arms 20, 20 are leaned against a wall surface or the like, the connecting members 14 ′, 14 ″ are connected. In addition, a gap is formed between the locking members 15 ′ and 15 ″ and the wall surface. Thus, the connecting members 14 ′ and 14 ″ and the locking members 15 ′ and 15 ″ can be easily put on the feet, In addition, it is easy to grasp by hand, and it is possible to move up and down safely and quickly.

  10 is an example in which connecting members 14 ′ and 14 ″ and locking members 15 ′ and 15 ″ are applied to the elastic structure 2 shown in the second embodiment. However, the connecting members 14 'and 14 "and the locking members 15' and 15" can be applied to the elastic structures 1 and 3 to 6 of the first and third to sixth embodiments. It is.

(Seventh embodiment)
FIGS. 11A and 11B are perspective views showing an extended state of the stretchable structures 7 and 8 according to the seventh embodiment of the present invention. In FIGS. 11A and 11B, the pantograph type multi-stage telescopic arm 10 is omitted for easy understanding of the drawing.

As shown in FIG. 11 (a), the elastic structure 7 is positioned at three vertices of an equilateral triangle, and each of the slide-type multi-stage telescopic arms 20 is arranged, and between the adjacent slide-type multi-stage telescopic arms 20, 20. Each has a structure in which a stretchable structure of the stretchable structure 2 (see FIG. 2) shown in the second embodiment is formed.
That is, the telescopic structure 7 is provided with a pair of pantograph multistage telescopic arms 10 and 10 (not shown in FIG. 11a) connected by the connecting member 14 between the adjacent slide multistage telescopic arms 20 and 20. It is a structure.

Therefore, the stretchable structure 7 exhibits a three-dimensional structure in the extended state, and exhibits extremely high bending rigidity with respect to the longitudinal direction. The telescopic structure 7 can be easily folded by reducing the three slide-type multistage telescopic arms 20.
Thereby, according to the expansion-contraction structure (folding-type ladder) 7, it can be used as a three-dimensional ladder which shows high rigidity at the time of expansion | extension, and it becomes possible to fold and store compactly when not in use.

  As shown in FIG. 11 (b), the elastic structure 8 is positioned at four vertices of a square, and each of the slide-type multistage extendable arms 20 is arranged, and between the adjacent slide-type multistage extendable arms 20, 20, Each has a structure in which a stretchable structure of the stretchable structure 2 (see FIG. 2) shown in the second embodiment is formed.

  Accordingly, the telescopic structure 8 also exhibits a three-dimensional structure in the extended state, exhibits high bending rigidity in the longitudinal direction, and can be easily folded by reducing the four slide-type multistage telescopic arms 20. Is possible.

In addition, although the expansion-contraction structure 7 and 8 of this embodiment applied the expansion-contraction structure of the said expansion-contraction structure 2 (refer FIG. 2) between the slide-type multistage expansion-contraction arms 20, it applies to the said 3rd and 4th embodiment. It is also possible to apply the stretchable structure shown in the stretchable structures 3 and 4 (see FIGS. 6 and 7).
Further, the connecting members 14 ′ and 14 ″ and the locking members 27 ′ and 27 ″ shown in FIG. 10 can be applied to the elastic structures 7 and 8 of the present embodiment.
In FIG. 11, the sliding multi-stage telescopic arm 20 is arranged at the apex of a regular triangle and a square. It is also possible.

(Eighth embodiment)
FIGS. 12A to 12C are perspective views showing the structure and the stretched state of the stretchable structure 9 according to the eighth embodiment of the present invention.
The elastic structure 9 of the present embodiment has a structure obtained by modifying the elastic structure 2 (see FIG. 2) shown in the second embodiment. Accordingly, the same components are denoted by the same reference numerals, and redundant description is omitted.

The telescopic structure 9 uses sliding multistage telescopic arms 20 ′, 20 ′ having an arch shape curved with a predetermined curvature radius instead of the straight pipe-shaped slide multistage telescopic arm 20 of the elastic structure 2. Have the structure.
In the sliding multi-stage telescopic arm 20 ′, each of the first to sixth arms 21 to 26 is curved with the same radius of curvature. Therefore, in a state where the arms 21 to 26 are reduced, the other arms 22 to 26 are accommodated in the first arm 21 and reduced as shown in FIG. Further, when the arms 21 to 26 are extended, an arch shape is formed by the first to sixth arms 21 to 26 as shown in FIG.

  The telescopic structure 9 includes a pair of pantograph-type multistage telescopic arms 10, 10 connected by a connecting member 14 between the slide-type multistage telescopic arms 20, 20, similarly to the telescopic structure 2 (see FIG. 2). It has the structure which arranged.

  The stretchable structure 9 of the present embodiment is also extendable and foldable similarly to the stretchable structure 2. When the telescopic structure 9 is folded, the first arm 21 and the sixth arm 26 of each slide type multi-stage telescopic arm 20, 20 are pressed so as to approach each other. Then, as shown in FIG. 12B, the slide-type multistage extendable arms 20 and 20 are reduced, and the pantograph type multistage extendable arms 10 and 10 are folded. In a state in which the elastic structure 9 is folded, the bulk is substantially equal to that of the elastic structure 2 and can be stored compactly.

On the other hand, when the telescopic structure 9 is extended, the first arm 21 and the sixth arm 26 of the slide type multistage telescopic arms 20 and 20 are pulled apart. Then, as shown in FIG. 12 (c), the slide type multistage extendable arms 20 and 20 are extended, and the pantograph type multistage extendable arms 10 and 10 are extended to form an arch shape.
That is, when the telescopic structure 9 is extended, the pantograph multistage telescopic arms 10 and 10 extended in an arch shape along the inside of the slide multistage telescopic arms 20 and 20 are positioned. The connecting member 14 is located between them, and an arm-type ladder shape is exhibited.

  The stretchable structure (foldable ladder) 9 of the present embodiment can be suitably used when evacuating from indoors to the outdoors, for example, by installing across the iron grid of the veranda.

In the stretchable structure 9 of the present embodiment, the stretchable structure of the stretchable structure 2 (see FIG. 2) is applied between the slide-type multistage stretchable arms 20 ′, but the stretchable structures 3, 4 (see FIG. 6). , See FIG. 7).
Further, the radius of curvature of the sliding multistage telescopic arm 20 can be set to an appropriate value in accordance with the purpose of use.
Further, the connecting members 14 ′ and 14 ″ and the locking members 27 ′ and 27 ″ shown in FIG. 10 can be applied to the elastic structure 9 of the present embodiment.

(Ninth embodiment)
Next, the support base according to the embodiment of the present invention will be described.
FIGS. 13A and 13B are perspective views showing a procedure for fixing the solar panel, which is a supported object, to the support base 30 according to the ninth embodiment of the present invention.
As shown in FIG. 13A, the support base 30 has a structure in which fixing brackets 31 and 32 are attached in advance to the stretchable structure 2 (see FIG. 2).

The fixing bracket 31 is an L-shaped frame, and is fixed to the end portions of the first arm 21, the third arm 23, and the fifth arm 25 of the sliding multistage telescopic arm 20 so as to face each other.
The fixture 32 is an S-shaped frame, and is fixed to the ends of the first arm 21 and the sixth arm 26 of the sliding multistage extendable arm 20.
The support base 30 of the present embodiment has a structure in which the fixing brackets 31 and 32 are fixed to the slide-type multistage telescopic arm 20 of the telescopic structure 2 as described above, but is extended and folded as shown in FIG. It is free.

  The solar panel 33 is a rectangular flat panel, and is provided with fixing holes 33a in the vicinity of both ends of the both side edges and in the center.

The solar panel 33 is fixed to the roof or the like by the following procedure.
First, the support 30 is conveyed to the roof in a folded state, and is extended to fix the fixing bracket 32 to a fixing portion (not shown) provided on the roof in advance.
Next, the solar panel 33 is transported to the roof, and is placed between the fixing brackets 31 and 31 so as to be covered and placed on the support base 30, as shown in FIG. Through the hole, the solar panel 30 is fixed by screwing into the fixing hole 33a.
With the above procedure, the solar panel 33 is fixed to the roof via the support base 30 as shown in FIG.

  Thus, according to the support base 30 of this embodiment, the support base 30 can be conveyed to the roof in a folded state, and the attachment work can be performed efficiently in a short time. Further, since the extended support base 30 has high bending rigidity in the longitudinal direction, the solar panel 33 can be stably supported.

In addition, although the support stand 30 of this embodiment was set as the structure using the said expansion-contraction structure 2 (refer FIG. 2), it is also possible to take the structure using any of the said expansion-contraction structures 1-9. .
In the present embodiment, one solar panel 33 is supported by one support base 30, but one solar panel 33 is supported by a plurality of support bases 30, or a plurality of solar panels 33 are one. It is also possible to adopt a configuration in which it is supported by one support base 30.
Moreover, it is also possible to support a solar water heater etc. instead of the solar panel 33.

(10th Embodiment)
FIGS. 14-16 is a perspective view which shows the support bases 35,40,45 which concern on 10th Embodiment of this invention.
As shown in FIG. 14, the support base 35 is formed by connecting two stretchable structures 2 (see FIG. 2). A hinge (not shown) is used for the connecting portion, and the telescopic structures 2 and 2 are rotatable with respect to each other.

In addition, locking members 36 and 36 are provided in the middle of the stretchable structures 2 and 2 so as to be able to bridge, so that the leg angle of the stretchable structures 2 and 2 is fixed.
The support base 35 is a structure using the stretchable structure 2 and functions as a stepladder when the stretchable structure 2 is extended, and can be reduced and folded compactly.

As shown in FIG. 15, the support base 40 is formed by connecting three of the telescopic structures 2 (see FIG. 2) in the longitudinal direction, and hinges (not shown) are used for the connecting portions so that they can be rotated with respect to each other. It is.
The support base 40 has a structure capable of bridging the locking member 41 between the adjacent elastic structures 2, 2.

  Therefore, for example, as shown in FIG. 15, when the U-shaped structure in which the elastic structure 2 at the center is substantially horizontal and the elastic structures 2 at both ends are substantially vertical is adopted, the adjacent elastic structures 2, 2 are used. By attaching the locking member 41 between them, relative rotation is prohibited and a stable U-shape can be maintained.

  The support base 40 has a structure using the stretchable structure 2 and can be used as a work table or a table for placing an article when the stretchable structure 2 is extended. Can be folded compactly. The support table 40 can be suitably used as a work table for performing various operations.

  As shown in FIG. 16, the support base 45 is formed by connecting the elastic structure 2 (see FIG. 2) to both longitudinal ends of the elastic structure 9 (see FIG. 12), and a hinge ( (Not shown) can be used to rotate with respect to each other.

  For example, as shown in FIG. 16, the support base 45 holds the telescopic structures 2 and 2 on both sides substantially vertically so that the heel has an arched gate shape. By decorating such a support base 45, an arch-shaped decoration gate can be easily formed.

  The support base 45 is a structure using the stretchable structures 2 and 9, can form the arch-shaped Kate when extended, and can be folded and stored compactly when not in use.

In addition, although the support bases 35, 40, and 45 shown in this embodiment were described as the structure which connected the said elastic structure 2 and 9, it is also possible to form combining the said elastic structures 1-9. Is possible.
In the present embodiment, two or three expansion structures 2 and 9 are connected. However, it is possible to connect four or more expansion structures.

(Eleventh embodiment)
FIGS. 17-19 is a top view which respectively shows the expansion-contraction state of the folding instruments 50, 55, 60 which concern on 11th Embodiment of this invention.
As shown in FIG. 17A, the folding instrument 50 is a folding insect collecting net 50 in which an insect collecting net 52 is attached to the tip of the telescopic structure 3 (see FIG. 6).
The net 52 is attached to the circular frame 51, and is fixed between the circular frame 51 and the elastic structure 3 via support members 53, 53 so as to be rotatable.

The insect collecting net 50 can be folded by reducing the stretchable structure 3 while supporting the circular frame 51.
That is, when the telescopic structure 3 is reduced as shown in FIG. 17B, the distance between the slide-type multistage telescopic arms 20 and 20 is increased, but the circular frame 51 can be held by the open legs of the support members 53 and 53. It is structured.

According to this insect collecting net 50, it is possible to easily form an insect collecting net having high bending rigidity by simply extending the telescopic structure 3 during use, and it can be folded and stored compactly when not in use.
In this embodiment, the support member 53 is interposed between the stretchable structure 3 and the circular frame 51. However, a net having a stretchable circular frame is directly attached to the distal end of the stretchable structure 3. It is also possible to fix.
Further, in the folding insect collecting net 50 of the present embodiment, the folding fish catching net can be formed by changing the net 52 to a fish catching net.

The foldable instrument 55 is a foldable lifebuoy 55 having a lifebuoy 56 attached to the tip of the telescopic structure 3 (see FIG. 6) as shown in FIG. 18 (a).
Similarly to the insect collecting net 50 (see FIG. 17), the life buoy 55 of the present embodiment also has a structure in which a space between the buoy 56 and the telescopic structure 3 is rotatably fixed by support members 53, 53. The telescopic structure 3 can be extended and folded while the floating ring 56 is supported.

  The foldable lifebuoy 55 of the present embodiment can be immediately extended and used for lifesaving in an emergency such as a fall accident by installing it on a ferry boat or a cargo ship. In addition, the storage space can be reduced by folding when not in use.

  Although the folding insect collecting net 50 and the folding lifebuoy 55 of the present embodiment are configured using the stretchable structure 3, the stretchable structures 1, 3, 4 (FIGS. 1, 6 and 6) are used. It is also possible to use FIG.

As shown in FIG. 19, the foldable instrument 60 is a foldable headphone 60 in which a phone pad 62 incorporating a headphone speaker 61 is attached to both longitudinal ends of the telescopic structure 9 (see FIG. 12).
Similarly to the insect collecting net 50 (see FIG. 17), the headphone 60 of the present embodiment adopts a structure in which the phone pad 62 and the telescopic structure 9 are rotatably fixed by support members 63 and 63. The telescopic structure 9 can be extended and folded while the phone pad 62 is supported.

  The foldable headphone 60 of the present embodiment can adjust the length of the telescopic structure 9 according to the user's head, and a comfortable wearing feeling can be obtained. Further, when not in use, the elastic structure 9 can be reduced and folded compactly.

  Although the folding headphone 60 of the present embodiment is configured using the telescopic structure 9 (see FIG. 12), the telescopic structure 3, between the slide-type multistage telescopic arms 20 ′, 20 ′. It is also possible to use a stretchable structure having a stretchable structure 4 (see FIGS. 6 and 7).

  In the present embodiment, the insect collecting net 50, the life buoy 55 and the headphone 60 have been described as examples of the folding instrument. However, in addition to these folding instruments, the present invention is applied to a frame of glasses, for example. By adopting the telescopic structure, folding glasses can be formed.

(Twelfth embodiment)
Next, a foldable pipe according to an embodiment of the present invention will be described.
FIG. 20 is a perspective view showing an extended state of the foldable pipe 65 according to the twelfth embodiment of the present invention.
The foldable pipe 65 employs a stretchable structure 7 ′ in which the connecting member 14 ′ and the locking member 27 ′ shown in FIG. 10A are applied to the stretchable structure 7 (see FIG. 11a). In other words, the stretchable structure 7 ′ is formed by covering the periphery of the stretchable structure 7 ′ with a jacket material 66 having stretchability over the entire length in the stretchable direction.

  The pipe 65 of the present embodiment can be shortened by folding the outer cover material 66 by reducing the three slide-type multistage telescopic arms 20. Further, by extending the slide-type multistage telescopic arm 20, it functions as a pipe whose periphery is covered with a jacket material 66 as shown in FIG.

  Therefore, for example, by applying the foldable pipe 65 to a suction pipe of a vacuum cleaner, it functions as a suction pipe having rigidity when in use, and can be folded and stored compactly when not in use.

In this embodiment, the pipe has a substantially circular cross section. However, it is also possible to form a pipe having a square cross section by employing the elastic structure 8 (see FIG. 11b).
It is also possible to use a telescopic structure provided with the telescopic structures 3 and 4 between the sliding multistage telescopic arms 20.

  As mentioned above, although embodiment of this invention was described, the material used for the expansion-contraction structure shown to the said embodiment has a rigid metal, a reinforced plastic, etc. suitably. In particular, by using lightweight metal materials and fiber reinforced plastics (FRP) that have rigidity such as aluminum, it is possible to form a stretchable structure that is lightweight, has sufficient strength, and can be folded compactly. It is.

Moreover, in the said embodiment, although the cross-sectional shape illustrated circular as the slide type | mold multistage expansion-contraction arm 20 and 20 ', the cross-section can also use a square or a polygon.
Moreover, the elastic structure shown by the said embodiment can set the number of steps | paragraphs and the full length at the time of expansion | extension suitably as needed.

  As described above, the stretchable structure of the present invention has sufficient strength when stretched and can be folded compactly. Therefore, by applying the telescopic structure of the present invention to various instruments having long rods and frames, it is possible to form a foldable instrument that can be folded compactly while having the original function of the instrument. It is.

(A)-(d) is a top view which shows the structure and expansion-contraction state of the expansion-contraction structure (foldable ladder) which concern on 1st Embodiment of this invention. (A)-(c) is a top view which shows the structure and expansion-contraction state of the expansion-contraction structure (foldable ladder) which concern on 2nd Embodiment of this invention. (A)-(c) is a top view which shows the structure and expansion-contraction state of the expansion-contraction structure which deform | transformed the expansion-contraction structure of FIG. (A)-(c) is explanatory drawing which shows the example which applied the structure which fits the both ends of a connection member to a slide-type multistage expansion-contraction arm at the time of expansion | extension to the expansion-contraction structure of FIG. (A) is explanatory drawing which shows the elastic structure which aimed at the improvement of the load-bearing strength of the elastic structure of FIG. 2, (b) is the elastic structure which aimed at the improvement of the load-bearing strength of the elastic structure of FIG. It is explanatory drawing which shows a body. (A)-(c) is a top view which shows the structure and expansion-contraction state of the expansion-contraction structure (foldable ladder) which concern on 3rd Embodiment of this invention. (A)-(d) is a top view which shows the structure and expansion-contraction state of the expansion-contraction structure (foldable ladder) which concern on 4th Embodiment of this invention. (A)-(c) is a top view which shows the structure and expansion-contraction state of the expansion-contraction structure (foldable ladder) which concern on 5th Embodiment of this invention. (A), (b) is a top view which shows the structure and expansion-contraction state of the expansion-contraction structure (foldable ladder) based on 6th Embodiment of this invention. (A), (b) is a perspective view which shows the expansion-contraction structure which applied the connection member from which a shape differs to the expansion-contraction structure of FIG. (A), (b) is a perspective view which shows the expansion | extension state of the expansion-contraction structure which concerns on 7th Embodiment of this invention. (A)-(c) is a perspective view which shows the structure and expansion-contraction state of the expansion-contraction structure which concerns on 8th Embodiment of this invention. (A), (b) is a perspective view which shows the procedure which fixes the solar panel which is a to-be-supported object to the support stand which concerns on 9th Embodiment of this invention. It is a perspective view which shows the support stand which concerns on 10th Embodiment of this invention. It is a perspective view which shows another support stand which concerns on 10th Embodiment of this invention. It is a perspective view which shows another support stand which concerns on 10th Embodiment of this invention. It is a top view which shows the expansion-contraction state of the foldable instrument (foldable insect collecting net) which concerns on 11th Embodiment of this invention. It is a top view which shows the expansion-contraction state of the folding instrument (folding type lifebuoy) concerning the 11th Embodiment of this invention. It is a top view which shows the expansion-contraction state of the folding instrument (foldable headphone) which concerns on 11th Embodiment of this invention. It is a perspective view which shows the expansion | extension state of the foldable pipe which concerns on 12th Embodiment of this invention.

Explanation of symbols

1, 2, 2 ', 2 ", 2a, 2b, 2c, 2d Telescopic structure (foldable ladder)
3, 4, 5, 6, 7, 8, 9 Telescopic structure (foldable ladder)
7 'telescopic structure 10 pantograph type multistage telescopic arm 14, 14', 14 "connecting member 20, 20 'slide type multistage telescopic arm 30, 35, 40 foldable support base 33 object to be supported (solar panel)
50 Folding device (folding insect collecting net)
52 Supported objects (insect collecting net)
55 Folding equipment (Folding lifebuoy)
56 Supported object (life buoy)
60 Foldable instruments (foldable headphones)
61 Supported object (headphone)
65 Folding pipe 66 Outer jacket material

Claims (12)

  A pair of pantograph-type multi-stage telescopic arms are arranged with a predetermined interval in the direction intersecting the expansion and contraction direction with the expansion and contraction direction aligned, and a connecting member is connected between each stage of both expansion and contraction arms. Telescopic structure   The telescopic structure according to claim 1, wherein the pair of pantograph-type multistage telescopic arms are arranged along the same plane.   A slide-type multi-stage telescopic arm is arranged along the extension direction of the pantograph-type multi-stage telescopic arm, and a plurality of stages including at least both ends of the pantograph-type multi-stage telescopic arm are provided to corresponding stages of the slide-type multi-stage telescopic arm. The telescopic structure according to claim 1, wherein the telescopic structure is attached to the frame in a freely rotatable manner.   A pair of slide-type multi-stage telescopic arms are arranged at predetermined intervals in the direction intersecting the telescopic direction with the telescopic direction aligned, and a pantograph-type multi-stage telescopic arm arranged along the telescopic direction of one slide-type multi-stage telescopic arm At least a plurality of steps including steps at both ends in the extension / contraction direction are rotatably attached to the corresponding steps of the one slide type multi-stage extension arm, and each stage of the pantograph type multi-stage extension arm and the other slide type multi-stage extension arm A telescopic structure characterized in that a connecting member is bridged and connected to each other.   The slide-type multistage telescopic arms are arranged at the apexes of the polygon so that the directions of extension are aligned, and the telescopic structures according to claim 3 or 4 are formed between adjacent slide-type multistage telescopic arms. Characteristic elastic structure.   The telescopic structure according to claim 3 or 4, wherein the sliding multistage telescopic arm is curved with a predetermined radius of curvature.   A telescopic structure characterized in that each pantograph-type multi-stage telescopic arm is provided with a detachable connecting member for fixing the multi-stage telescopic arm at an intermediate position during expansion and contraction.   A foldable ladder formed of the stretchable structure according to any one of claims 1 to 7.   A foldable support base, comprising the stretchable structure according to any one of claims 1 to 7.   It is a folding instrument formed using the elastic structure of any one of Claims 1 thru | or 7, Comprising: A to-be-supported object is attached to the one end or both ends of the expansion-contraction direction of the said expansion-contraction structure. Folding instrument characterized.   The folding apparatus according to claim 10, wherein the supported object is any one selected from an insect collecting net, a fish catching net, a life buoy, a headphone, and glasses.   A foldable pipe formed using the stretchable structure according to claim 5, wherein the stretchable structure is configured to cover the stretchable structure with a stretchable covering material over the entire length in the extension direction. Folding pipe characterized by

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