JPH056625B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telescopic structure that occupies a small storage volume when folded and forms a columnar truss structure when extended.

[Conventional technology]

Conventionally, this type of telescopic structure consists of at least three longitudinal beams, a large number of small square timber devices (horizontal beam devices) that are pivotally connected to the longitudinal beams in horizontal positions, and these connection points are connected diagonally. Typical examples include the telescopic structure disclosed in Japanese Patent Publication No. 49-26653, which is composed of a tensioning device including a diagonal tension member, and the telescopic structure shown in Figs. 6 to 8, which are improved based on the telescopic structure. known as.

[Problem that the invention seeks to solve]

However, in the telescopic structure disclosed in the above-mentioned patent publication, the members that deform with elongation when the structure is deformed are the longitudinal beams and half of the tensile tension members, and the small square timber devices that become the horizontal beams do not deform. . For this reason, it is necessary to install tension springs on all tension members on one diagonal side of the tensioning device that diagonally connects the small square timber devices, and the volume increases due to interference between the spring and the small square timber device when folded, and the spring itself However, from the viewpoint of space saving and weight reduction, the merits of the extension concept, especially for space use, were disadvantageous.

On the other hand, the sixth version has been improved to solve the above problems.
The tensioning device shown in Figures 8 to 8 consists of at least three horizontal wires that extend straight in the longitudinal direction of the structure when the structure is extended, but can be coiled and deformed at right angles to the longitudinal direction when the structure is retracted. The vertical beams 1 to 3 are spaced apart from each other, and the vertical beams 1 to 3 are located in a plane extending at right angles to the longitudinal direction of the structure, and when the structure is extended, they are spaced apart from each other in the longitudinal direction of the structure. When the structure is contracted, a large number of horizontal beam devices 5 are formed of flexible members that are bent in the vertical direction by torsional force and stacked one above the other, and the horizontal beam devices 5 and the vertical beams 1 to 3 are pivoted. a pivot device 6 that is coupled to the
The tension member 7 is arranged in a diagonal X-shaped positional relationship to tension the horizontal beam pivots when the structure is extended. The device is simply a tension member 7
The cross-beam device 5 is now deformed out of plane instead of restraining its elongation, thereby achieving a reduction in weight and size.

This telescopic structure has a clever extension mechanism, and has advantages such as being able to extremely reduce the volume when stored and being lightweight; however, this telescopic structure also has the following problems.

(1) The pivot device 6 (joint fittings) that connects the vertical beams 1 to 3 and each of the horizontal beam devices 5 in a spindle-like manner is complicated, increases processing and assembly costs, and is difficult to downsize.

(2) There is a lower limit to the setting of the interval between the cross beam devices 5, which is an important design parameter related to the extension force, rigidity, and weight of the structure.

6 and 7 show the cross beam device 5 and the tension member 7.
shows the relative relationship when the structure is expanded and contracted. If the distance between the horizontal beam devices 5 when the structure is extended is approximately 1/2 or less of the structure diameter passing through the longitudinal beams 1 to 3, the tension member 7 will not loosen during contraction, and therefore the contracted diameter will be smaller than the diameter when expanded. It has no choice but to become smaller. Therefore, this cross beam device 5 is compressed in the radial direction when stored, and as a result, the cross beam members of this cross beam device etc. are elastically deformed so as to pop out from within a plane perpendicular to the longitudinal direction of the mast and expand in the longitudinal direction of the mast. do. On the other hand, one side of the diagonal tension member 7, that is, the tension member that is under tension when the structure is stowed, is present in a tensioned state near the center of the mast, and this is due to the close contact of the deformed cross beam device 5. Since this prevents close overlapping, the storage efficiency becomes extremely poor as shown in FIG. 8.

(3) It is difficult to adjust the rigidity of the cross beam device 5, which has an important effect on the extension mode of the structure, due to the following reasons.

Since the longitudinal beams 1 to 3 and the cross beam device 5 are coupled together in a pivotal manner, and the diagonal tension member 7 is coupled near the coupling fulcrum, it is difficult to remove and attach them.

Since the rigidity of the cross beam device 5 depends on the rigidity of the member itself, considering the rigidity requires changing the cross beam device itself.

As shown in FIG. 9, the structure expands and contracts by loosening and winding the central control rope (not shown) depending on the spacing and rigidity of the cross beam device 5. It is known that there are two modes: a local coiling mode shown in Figure A and an ordinary helical mode shown in Figure B.
It is clear that the local coiling mode shown in FIG. 9A is preferable in terms of ease of ground testing and ensuring rigidity during extension.

However, the structure exhibits nonlinear behavior with large deformations of the longitudinal beams 1 to 3 and the cross beam device 5, and trial-and-error searching is required to select the cross beam device 5 that exhibits the optimal extension mode. Therefore, easy installation, removal, and easy adjustment of the rigidity of the cross beam device 5 will greatly contribute to shortening the development cost and development period of the structure, but in the conventional case, the basic structure described above This was difficult due to the

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a plurality of connecting devices facing the horizontal beam pivoting device for fixing the vertical beam, and disposing the horizontal beam device in the same plane joined between the respective connecting devices. a plurality of horizontal beam members; a horizontal beam support shaft that is movably fitted into the center hole of the member connector and whose shaft end is inserted into the bearing hole of the horizontal beam pivot;
The present invention is characterized by comprising an elastic biasing means for biasing the cross beam support shaft in the direction of the cross beam pivot support.

[Effect]

In the above-mentioned cross beam device, since the cross beam support shaft is urged outward by the elastic biasing means, the shaft end of the cross beam support shaft is elastically fitted into the bearing hole of the cross beam pivot. It can be easily assembled by In addition, when the longitudinal beam is deformed by winding into a coil to shorten this telescopic structure, the above-mentioned horizontal beam support shaft moves elastically inward, and this horizontal beam device substantially moves in the radial direction. Since it contracts elastically, this cross beam device is prevented from being deformed so as to bulge in the longitudinal direction from within a plane perpendicular to the longitudinal direction of the structure, and this cross beam device is brought into close contact, allowing the structure to be stored shorter. Ru.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings in Figs. Three horizontally spaced vertical beams 1 to 3, which sometimes extend straight in the longitudinal direction of the structure, but can be rolled and deformed to positions perpendicular to the longitudinal direction when the structure is retracted; Elastic deformation is possible only within the plane of existence, which lies in a widening plane perpendicular to the structure, and is spaced apart in the longitudinal direction of the structure when the structure is extended, and overlaps one above the other when the structure is contracted. a large number of horizontal beam devices 15, and horizontal beam pivot supports 11, 1 attached to the vertical beams 1 to 3 and pivotally supporting the horizontal beam devices 15.
2 and 13, and a tension member 7 arranged in a positional relationship that tensions the cross beam pivot portion in a diagonal X shape when the structure is extended.

The cross beam devices 15 of each stage arranged at intervals in the longitudinal direction of the longitudinal beams 1 to 3 include cross beam pivots 11 to 13.
Three connectors 16, 17, 18 facing and spaced apart from each other.
, three horizontal beam members 19, 20, 21 having elastic force arranged in a triangular shape in the same plane and joined by inserting both ends between the respective connectors, and the member connectors 16 to 18. The shaft end is movably inserted into the center hole 22 of the horizontal beam pivot 11 to 13.
Cross beam support shaft 2 inserted into a to 13a as shown in Fig. 3
3, 24, 25, and elastic biasing means for biasing the horizontal beam support shafts 23-25 in the direction of the horizontal beam pivots 11-13, and this elastic biasing means is shown in FIGS. In the case of the embodiment shown in FIG.
A tension member 26 such as a system is strung obliquely (in a V-shape in plan) between the rear end of the cross-beam member 25 and the cross-beam members 19 to 21 which are elastically curved as shown in FIG. Each horizontal beam support shaft 23-25 with elastic restoring force of 19-21
It has a structure that urges outward.

In this embodiment, the bending of the members 19 to 21 is the elastic force source of the cross beam device 15, and the same cross beam device 15 is used for each stage by adjusting the attachment point of the tension member 26 to the cross beam members 19 to 21. Even though
The elastic force applied to the pivot point can be changed arbitrarily.

FIG. 4 shows another embodiment of the cross beam device 15, which includes the cross beam pivots 11 to 1.
3 and three connectors 1 spaced apart from each other as shown in FIG.
6, 17, 18, three horizontal beam members 19a, 20a, 21a arranged in the same plane and joined by inserting both ends between the respective connectors, and the center hole of the member connectors 16 to 18. 22, and the shaft end portion is inserted into the bearing hole 11a of the cross beam pivot tool 11 to 13.
13a as shown in Fig. 3,
24, 25, and a tension coil spring 27 that biases the cross beam support shafts 23-25 in the direction of the cross beam pivots 11-13. Note that this tension coil spring 27 is connected to each horizontal beam support shaft 23 to
25, one end of which is attached to various horizontal beam support shafts 23~
At the rear end of 25, the other end is the cross beam member connector 16-1.
8 to constitute elastic biasing means for biasing each of the horizontal beam support shafts 23 to 25 outward.

In this embodiment, the rigidity of the cross beam device 15 can be adjusted as desired by replacing the spring 27.

FIG. 5 shows still another embodiment of the cross beam device 15, in which the elastic biasing means of the cross beam support shafts 23, 24, 25 are horizontally suspended between the intermediate portions of the cross beam members 19a to 20a, and elastically biased in a bow shape. Each horizontal beam support shaft 23 is curved.
The difference is that it is comprised of an elastic member 28 that urges 25 outward. The rest of the structure is the same as that shown in FIG. 4, so the same parts are given the same reference numerals and detailed explanations are omitted.

FIG. 2 shows the relationship between the cross beam device 15, the cross beam pivot device, and the diagonal tension member 7. The functions required of the cross beam pivot device are only supporting the elastic repulsion force of the cross beam device 15 and supporting the rotation of the cross beam device 15.
No pin connection with the cross beam device 15 is required.

The elastic repulsive force from the cross beam device 15 is always supported through the diagonal tension members 7 attached to the cross beam pivots 11 to 13, and the inside of the structure is supported by the diagonal tension members 7 pulling each other. Since it is balanced, there are no inconveniences caused by pivoting.

The present invention is mainly effective when applied when the mutual spacing between the cross beam devices 15 is about 1/2 or less of the structure diameter. In the above case, as already mentioned, when the structure is extended, the degree of contraction in the plane of the cross beam device 15 is smaller than in all other states (transition state, storage state), so the structure when stored is Although the diameter is smaller than that when it is extended, in the present invention, the cross beam device 15 deforms only within the plane in which it exists, so even in the stored state, it can carry the weight without interfering with the diagonal tension member 7. can fit.

In addition, in all conditions of the structure, the cross beam device 15
receives the counterbalancing reaction force from the diagonal tension member 7 inwardly of the structure via the transverse beam pivots 11 to 13,
It will not come off due to vibrations, shocks, etc. unless there is human action. However, if the horizontal beam support shafts 23 to 25 are moved inward by manual operation, the horizontal beam device 15
It can be easily removed.

〔Effect of the invention〕

The expandable structure of the present invention has a simple structure and is easy to assemble because the cross beam device can elastically deform inward in the radial direction, and when shortened, the cross beam device can elastically contract inward. This cross beam device does not undergo elastic deformation to bulge in the longitudinal direction of the structure, and has the advantage that it can be housed in a smaller volume.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a part of the telescoping structure of the present invention in an extended state, and FIG. 2 is a perspective view of the main part showing the relationship between the cross beam device, the cross beam pivot, and the diagonal tension member of this telescoping structure. Figure 3 is a cross-sectional plan view showing the cross beam device of the structure in relation to the pivot, and Figure 4 is a cross-sectional plan view showing the cross beam device of the structure in relation to the pivot
5 and 5 are plan views showing two different embodiments of the cross beam device, FIGS. 6 and 7 are perspective views showing a conventional telescopic structure in an extended state and an intermediately contracted state, and FIG. 8 are perspective views of the same storage state, Figures 9A and B
FIG. 3 is an explanatory diagram showing two extension modes of the structure. 1-3...Longitudinal beam, 7...Diagonal tension member, 11
~13...Horizontal beam pivot, 11a-13a...Bearing hole of crossbeam pivot, 15...Horizontal beam device, 16-18
...Connector, 19-21 (19a-21a)...
Cross beam member, 22...Connector center hole, 23-25...
...Horizontal beam support shaft, 26...Tension member, 27...Tension coil spring, 28...Elastic member.

Claims (1)

[Scope of Claims] 1. At least three laterally spaced wires that extend straight in the longitudinal direction of the structure when the structure is extended, but are capable of being rolled and deformed in positions perpendicular to the longitudinal direction when the structure is contracted. When the longitudinal beams are stretched straight and the structure is stretched, they are located in a plane perpendicular to the longitudinal direction of the structure, and are spaced apart from each other in the longitudinal direction of the structure. a large number of transverse beam devices that are stacked in the longitudinal direction of the structure when the structure is compressed by winding deformation of the longitudinal beams;
comprising a cross-beam pivot that is attached to the longitudinal beam and pivots the cross-beam device, and a tension member that is arranged in a positional relationship that tensions the cross-beam pivots in a diagonal X shape when the structure is extended; The above-mentioned cross beam device includes a plurality of connectors facing each of the above-mentioned cross-beam pivots, and a plurality of cross beams that connect the respective connectors and are arranged in a plane perpendicular to the longitudinal direction of the structure. a member, a cross-beam support shaft that is movably inserted into the center hole of the connector and whose shaft end is inserted into the bearing hole of the cross-beam pivot; and a cross-beam support shaft that is moved in the direction of the cross-beam pivot. and an elastic biasing means for biasing the structure, and the cross beam support shaft moves radially within a plane perpendicular to the longitudinal direction of the structure, thereby causing the cross beam device to move perpendicular to the longitudinal direction of the structure. A stretchable structure characterized by being elastically deformable within a plane. 2. The elastic biasing means for the horizontal beam support shaft tensions a tension member diagonally between the rear end of the horizontal beam support shaft and the elastically curved horizontal beam member, and uses the elastic restoring force of the cross beam member to bias the horizontal beam support shaft. 2. The telescopic structure according to claim 1, wherein the telescopic structure is configured to urge the member outwardly. 3. Claim 1, characterized in that the elastic biasing means of the cross beam member is a tension coil spring having one end attached to the rear end of the cross beam support shaft and the other end attached to a connector of the cross beam member. The stretchable structure described. 4. Claims characterized in that the elastic biasing means for the horizontal beam support shaft is an elastic member that is horizontally suspended in the middle part of the horizontal beam member and is elastically curved into a bow shape to bias the horizontal beam support shaft outward. The stretchable structure according to item 1.