JP2592898B2 - Leg device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a leg device used for a portable antenna device used as a ground mobile station for satellite communication including satellite broadcasting, for example. About.

(Prior Art) In general, an antenna device for satellite communication is required to conform to various antenna standards such as the U.S. FCC standard.
Large diameters such as 5m are required. For this reason, as a portable antenna device provided with such a reflector, a device intended for in-vehicle use has prevailed.

However, when the portable antenna device is used in a place where the vehicle cannot move, the portable antenna device cannot be transported, so that there is a problem that the use place is restricted.

On the other hand, in the conventional portable antenna device which can be carried by human power, the aperture diameter of the reflecting mirror is up to about 1.2 m, and it does not conform to the U.S. FCC standard, which is said to be the strictest antenna standard, It was not satisfactory in terms of reliability. Therefore, it is conceivable to install a reflector with an aperture diameter of 1.8 m or more that conforms to the U.S. FCC standard for a portable antenna device targeting such a 1.2 m reflector,
According to this, since it does not have a configuration for a large-diameter reflecting mirror, if the mechanical requirements are satisfied, the structure becomes very complicated and the number of packages increases, so that folding and unfolding work is performed. Is very troublesome to handle.

For this reason, in portable antenna devices, the US FCC
It is required to ensure the number of packages that can be easily carried by humans and that can be easily folded and unfolded after conforming to various antenna standards such as standards. In this case, the disassembled parts may conform to international flight package standards in terms of their dimensions in order to ensure easy portability.

Dimensions (including case): height + width + height ≤80 inch (= 2.032m) Weight (including case): ≤100 pounds (= 45.359kg).

For example, as a component of such a portable antenna device, there is a leg device on which a large-diameter reflecting mirror is installed. When the size of the reflector is increased, the size of the leg must be increased to ensure the reliability of the device. It is difficult to secure a shape suitable for carrying the above-mentioned international flight package standard only with the above-mentioned one.

Such a situation is not limited to the portable antenna device, and the same applies to a leg device used for installing a heavy object such as a large television camera.

(Problems to be Solved by the Invention) As described above, in the conventional leg device, for example, the US
If a configuration is adopted in which a reflector corresponding to various antenna standards such as the FCC standard is installed, the size becomes large, and for example, there is a problem in that the device does not conform to the international flight package standard suitable for portability.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a leg device that has a simplified configuration and can be made smaller in a folded state than in an expanded state.

[Constitution of the Invention] (Means for Solving the Problems) The present invention relates to a mounting portion having a rotatable support portion to which an installation target is attached and detached, and a rotation direction of the support portion with respect to the mounting portion. It has a telescopic fixed leg and a plurality of folding legs radially arranged in a direction orthogonal to each other, wherein the fixed leg is fixedly disposed on the mounting portion, and the folding leg is provided on the support portion with respect to the mounting portion. A leg portion rotatably supported about an axis substantially parallel to the rotation axis and arranged to be foldable along the fixed leg, and provided at each end of the fixed leg and the folding leg of the leg portion; And a level-adjusting installation section that is provided to be extendable and contractible in the direction of the rotation axis of the folding leg.

(Operation) According to the above configuration, the plurality of legs are pivotally folded around the fixed leg, and the fixed leg is reduced in the axial direction so that the length of the other leg is reduced. It is folded and accommodated according to its dimensions. In addition, the plurality of folded legs are installed by rotating the other leg with respect to the fixed leg and rotating the other leg, and extending the fixed leg to correspond to the length of the other leg. Is done. Therefore, in the unfolded state, the unfolded installation area can be substantially the same as when all the legs are formed in the same shape and size, and the accommodation shape in the folded state can be reduced. Thus, in the unfolded state, a large-sized heavy object can be reliably supported, and when folded, it is folded and accommodated in a range suitable for easy portability.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a portable antenna device to which a leg device according to one embodiment of the present invention is applied.
A base 30, a support base 50, a reflecting mirror 70, and a power supply unit 90 are detachably combined. That is, as shown in FIG. 2, the leg 10 is provided with a mounting portion 11 whose azimuth angle can be adjusted at a substantially central portion thereof. Around the mounting portion 11, first to third legs 12 to 14 having installation portions 12a to 14a whose levels can be adjusted are arranged at predetermined intervals. The first to third legs 12 to 14 are configured such that the first leg 12 is a telescopic mechanism 15.
Is disposed so as to be able to expand and contract in the axial direction (the direction of arrow A) through
Second and third legs 13 and 14 are provided so as to narrow the first leg 12 so as to be rotatably foldable and deployable with respect to the mounting portion 11. According to the first leg
The twelve expansion / contraction mechanisms 15 are selectively operated to adjust the length to substantially the same length. As shown in FIG. 3, for example, the telescopic mechanism 15 includes an outer cylinder 12b whose first leg 12 is fixedly supported by the mounting portion 11, and an inner cylinder 12c provided with the installation portion 12a. The inner cylinder 12c is inserted in the outer cylinder 12b in the axial direction (arrow A).
Direction). And this outer cylinder 12b
A locking clamp member 15a is fixedly provided at an end of the lock member. A ratchet-type operation lever 15b is operably provided on the clamp member 15a, and a locking portion 15c corresponding to the sliding member 12d provided on the inner cylinder 12c is formed at an intermediate portion thereof. The clamp member 15a locks and unlocks the inner cylinder 12c to and from the outer cylinder 12b in conjunction with the switching operation of the operation lever 15b, thereby restricting entry and exit.
Of length for holding in the L ₁ and L ₁ -L ₂ (see FIG. 2 (b)).

In addition, a base 30 is rotatably mounted on the mounting portion 11 of the leg 10 using a screw (not shown) or the like. As shown in FIG. 1, a mounting portion 32 is formed on the base 30 at a substantially central portion of the base 31 so as to correspond to the mounting portion 11 of the leg 10. Then, first to third link members 33 to 35 having different lengths are formed in a substantially trapezoidal shape on the base 31 sandwiching the mounted portion 32 by using coupling pins (not shown for convenience of illustration). A pair of link mechanisms 36 , 36 linked to each other are disposed facing each other, and fourth and fifth link members having different lengths between the link mechanisms 36 , 36 are provided.
It is linked in a substantially box shape using 37,38. Reinforcing members 39 are linked and attached to both ends of the fourth link member 37 among them. Also, the base 31 and the fourth link member
An elevating mechanism 40 called a jack as an elevation angle adjusting section is link-coupled to a substantially central portion of the 37 using a coupling pin (not shown for convenience of illustration). As shown in FIG. 4, the lifting mechanism 40 is provided with a handle 40b operable on a jack body 40a, and when the drive shaft 40c is driven to expand and contract in the axial direction corresponding to the rotation operation of the handle 40b. As shown in FIG. 5, first to fifth link members 33 to 35, 37, 38 (in FIG. 5, for the sake of illustration, FIG. 4 and fifth link members 37, 38).
(Not shown) is controlled, and the elevation angle of the reflecting mirror 70, which will be described in detail later, is continuously variably set at 5 ° to 80 °.

The base has first to fifth link members 33 to 35, 3
The connection pins (not shown for convenience of illustration, not shown) of the predetermined link connection portion of the lifting mechanism 40 are provided detachably, and the connection pins are detached so as to be pivotally folded or unfolded. By doing so, as shown in FIGS. 6 (a) to 6 (d), the portable telephone is folded and developed into a portable folded state or an expanded state where the antenna can be installed.

Further, the support base 50 detachably mounted to the base 30 is detachably attached to the fifth link member 38 and the reinforcing member 39 with the reflecting mirror mounting member 51 being pin-coupled (see FIG. 4). (See FIG. 1). This reflector mounting member 51 is a telescopic mechanism.
It is provided so as to be extendable and contractible via 52, and a reflector mounting portion 53 is provided at both ends. One end of a connecting member 54 is rotatably foldably connected to one end of the reflector mounting member 51 so as to be freely deployable. The connection member 54 is provided so as to be able to expand and contract in the axial direction via an expansion mechanism 55, and a power supply unit mounting member 56 is rotatably foldably connected to the other end thereof. The feeder mounting member 56 is provided with a rotatable middle portion, and a power feeder mount 57 is detachably attached to the reflecting mirror mounting member 51 at the distal end thereof. The power supply section 90 is detachably attached to the power supply section mounting section 57.

The support base 50 is expanded and folded as shown in FIGS. 7A to 7D. When the support base 50 is folded and accommodated from the expanded state, first, the power supply unit mounting member 56 is rotated. , And the intermediate portion thereof is rotated to be opposed to the reflector attaching member 51 and the connecting member 54. Next, the reflector mounting member 51 and the connecting member 54 are reduced via the telescopic mechanisms 52 and 55, respectively, as shown in FIG. 7D, and the folding is completed here. When the support thus folded is to be unfolded again, the procedure shown in FIGS. 7 (d) to 7 (a), which is substantially the reverse of the above procedure, is performed. The telescopic mechanisms 52 and 55 are the telescopic mechanism 1 shown in FIG.
The configuration is substantially the same as that of 5, and the details are omitted here.

The reflecting mirror 70 is formed of, for example, first to sixth divided bodies 71 to 76 divided into six pieces.
As shown in FIG. 8, the divided bodies 71 to 76 are connected to each other via a connection mechanism 77 having a substantially similar configuration to form a mirror surface. That is, as shown in FIGS. 9 and 10, the first to sixth divided bodies 71 to 76 have first and second couplings forming pairs at mutually opposing positions. Parts 78, 7
9 are formed respectively. A fitting hole 78a is formed in the first coupling portion 78, and a lock member 78b is provided corresponding to the fitting hole 78a so as to freely enter and exit in the directions of arrows B and C. On the other hand, the fitting portion 79a of the second connecting portion 79 is
The fitting portion 7 is formed so as to protrude corresponding to the fitting hole 78a.
An insertion hole 79b is formed in 9a. The fitting portion 79a of the second coupling portion 79 is fitted into the fitting hole 78a of the first coupling portion 78, and the insertion hole 79b of the fitting portion 79a of the second coupling portion 79 is The coupling member 80 is inserted. This coupling section 80
For example, a screw portion 80a is formed at one end, and a driving cam lever 81 is rotatably attached to the other end. The cam lever 81 is provided with a driving cam 82. The cam 82 moves the connecting member 81 in the direction of arrow D in conjunction with its clockwise and counterclockwise rotation as shown in FIG. A first position X (indicated by a dashed line in the figure) for urging and a second position Y (indicated by a solid line in the figure) for urging the coupling member 81 in the direction of arrow E are adopted.

The coupling member 80 is in a state in which the coupling portion 79a of the second coupling portion 79 is coupled and coupled to the coupling hole 78a of the first coupling portion 78, and a washer 83 and a pair of After the springs 84, 84 and the washer 85 are sequentially attached, the spring 84, 84 and the washer 85 are inserted into the insertion hole 79b of the fitting portion 79a of the second coupling portion 79. Next, the connecting member 80
The nut member 86 is screwed onto the screw portion 80a, the nut member 86 is locked by the lock member 78b, and the cam lever 81 is rotatably attached to the other end. Here, when the cam lever 81 is rotated clockwise in FIG. 11,
The cam 82 assumes the first position X as described above,
80 is urged to move in the direction of arrow D against the spring force of the disc springs 84,84. As a result, an axial force is applied to the connecting member 80 by the spring force of the disc springs 84, 84, and the first and second connecting portions 78, 79 are fastened and positioned. Join 76.

When the first to sixth divided bodies 71 to 76 are divided, the cam lever 81 is reflected in the counterclockwise direction. Then, the cam lever 81 takes the second position Y by moving the cam 82 in the direction of the arrow E as described above. As a result, the spring force of the disc springs 84, 84 of the connecting member 81 is reduced, the axial force is reduced, and the fastening of the first and second connecting portions 78, 79 is released. Here, each part of the connecting mechanism 77 is disassembled in a substantially reverse order, and the first to sixth divided bodies 71 to 76 are divided.

Now, the leg 10, the base 30, and the support base configured as described above.
The reflector 50, the reflector 70, and the power supply unit 90 are assembled and disassembled in the following procedure.

That is, the assembling procedure is as follows. First, the first to third legs 12 to 14 of the leg portion 10 are unfolded as shown in FIG. The base 30 developed as described above is attached (see FIG. 2B). At this time, the elevation mechanism 40 of the base 30 is adjusted in advance using a reference scale 41 (refer to FIG. 3) called an EL scale, and the elevation angle is roughly adjusted. Here, the leg portion 10 is set at an approximate level by adjusting the installation portions 12a to 14a of the legs 12 to 14, and thereafter, the support base 50 developed as described above with respect to the base 30 is provided. It is mounted (see FIG. 3C). A power supply section 90 is attached to the support section 50 at a power supply section mounting section 57, and a connection waveguide 91 connected to a transceiver (not shown) is connected to the power supply section 90 (see FIG. )reference). And, in the reflector mounting portion 53 of the reflector mounting member 51,
First, the first to fourth divided bodies 71 to 74 connected by using the connecting mechanism 77 as described above are attached (see FIG. 4D), and thereafter, the first to fourth divided bodies are attached. Fifth and sixth divided bodies 75 and 76 are connected to 71 to 74 (see FIG. 9E). Next, the installation part 12 of each leg 12 to 14 of the leg 10
A to 14a are adjusted to perform fine adjustment of the level, and the elevating mechanism 40 of the base 30 is operated to perform fine adjustment of the elevation angle of the reflecting mirror 70, and the assembly is completed here.

As described above, the leg device uses the first leg 12 among the radially arranged first to third legs 12 to 14 as an extensible fixed leg, and the other second and third legs 13 and 14. The first leg 12 is provided so as to be freely foldable and expandable with respect to the first leg 12, and the first leg 12 is selectively extended and expanded in accordance with the expansion and folding of the other second and third legs 13 and 14. By reducing its length dimension L ₁
And L ₁ −L ₂ . According to this,
In the unfolded state, the unfolded installation area can be obtained substantially the same as when the first to third legs 12 to 14 are all formed with the same length (see FIGS. 2 (a) and 2 (b)). in its folded state, the second and third substantially the same state as the reduced L by ₂ dimensional length of the first leg 12 is shortened
(See FIGS. 2 (b) and 2 (c)), it is possible to reliably support a large heavy object in the deployed state. And the first to third
When the legs 12 to 14 are folded and housed, the legs 12 to 14 can be reduced in size to conform to, for example, the International Flight Package Standard, and can be transported as simply as possible. For example, when the leg portion 10 is configured without the first leg 12a being arranged to be extendable / contractible, the shape of the vertical + horizontal + length in the folded state becomes 2390 mm. It can be downsized to 1850mm.

In the above embodiment, the first to third legs 12 are attached to the leg 10.
Although the description has been given of the case where the three to 14 are provided radially, it is also possible to arrange the three or more legs with respect to the first leg 12 so as to be pivotally foldable and expandable. In this case, the first
The other legs that are not opposed to the legs 12 are folded in a pivotal manner,
Second and third legs 13, 1 rotated substantially parallel to the first leg 12
It is necessary to configure so as to be located substantially parallel to 4.

In the above embodiment, the description has been given of the case where the present invention is applied to a portable antenna device. However, the present invention is not limited to this, and the present invention can also be applied to a heavy-weight leg device such as a television camera. Therefore, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a leg device that has a simplified configuration and can be made smaller in the folded state than in the expanded state.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a portable antenna device to which a leg device according to an embodiment of the present invention is applied, FIG. 2 is a configuration diagram showing a leg device according to the present invention taken out of FIG. 1, and FIG. 2 is a structural view showing the telescopic mechanism shown in FIG. 2, FIG. 4 is a structural view showing the elevating mechanism provided on the base shown in FIG. 1, and FIG. 5 is a diagram showing an operation state of the elevating mechanism shown in FIG. FIG. 6 is a view for explaining the folding and unfolding operation of the base of FIG. 1, and FIG. 7 is a view for explaining the folding and unfolding operation of the support base of FIG. FIG. 8, FIG. 8 is a configuration diagram showing the reflection mirror of FIG. 1 taken out, FIGS. 9 to 11 are diagrams showing the coupling mechanism of FIG. 8, and FIG. FIG. 9 is a diagram shown to explain the assembling / disassembling operation of the drawing. 10 leg section, 30 base, 50 support base, 70 reflecting mirror, 90 feeding section, 11 mounting section, 12 to 14 first to third legs, 12a ~ 13a …… Installation section, 15… Expansion mechanism, 12b
... outer cylinder, 12c ... inner cylinder, 12d ... sliding member, 15a ... clamp member, 15b ... operating lever, 15c ... locking part, 31 ...
... Base, 32 ... Mounted part, 33-35 ... First to third link members, 36 ... Link mechanism, 37,38 ... Fourth and fifth link members, 39 ... Reinforcement member, 40 ... Elevating mechanism, 40
a ... jack body, 40b ... handle, 40c ... drive shaft, 51 ... reflector mounting member, 52, 55 ... telescopic mechanism, 53
... Reflecting mirror mounting part, 54... Connecting member, 56... Feeding part mounting member, 57... Feeding part mounting part, 71 to 76... First to sixth divided bodies, 77. ... the first joint,
78a: fitting hole, 78b: lock member, 79: second connecting portion, 79a: fitting portion, 79b: insertion hole, 80: connecting member,
81… Cam lever, 82… Cam, 83,85… Washer, 8
6 ... Nut member, 41 ... Standard scale.

Claims (1)

(57) [Claims] 1. A mounting portion having a rotatable support portion to which an installation object is attached and detached, and an expandable and contractible radially disposed with respect to the mounting portion in a direction substantially orthogonal to a rotation direction of the support portion. A fixed leg and a plurality of folding legs, wherein the fixed leg is fixedly arranged on the mounting portion, and the folding leg is rotatable with respect to the mounting portion around an axis substantially parallel to a rotation axis of the support portion. And a leg portion that is supported and is disposed so as to be foldable along the fixed leg, and is provided at each end of the fixed leg and the folding leg of the leg portion,
A level adjusting installation portion provided to be extendable and contractible in the direction of the rotation axis of the folding leg.