JP2553540Y2 - Tripod - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tripod for supporting and fixing an astronomical telescope and a camera.

[0002]

2. Description of the Related Art A tripod for supporting and fixing a heavy object such as an astronomical telescope or a camera generally has a base for supporting the heavy object and three legs rotatably provided on the base. When used, each leg is opened outward. However, if the heavy object to be supported is heavy, especially if the legs are made of a material with low rigidity such as aluminum, the legs may be warped or twisted, or the connection between the frame and the legs may be loose. Occurs, and the heavy object cannot be stably supported. In particular, in a device such as an astronomical telescope for observing a target at a high magnification, there is a problem in that the wobble, the reeds, and the backlash are amplified by the magnification, and high-precision observation cannot be performed.

For this reason, various measures have been conventionally taken to impart rigidity to the legs by imparting stress thereto. However, since the conventional legs are generally configured to open outward, rigidity is imparted to the legs. In order to provide the leg portion, a pressing means for pressing the leg portion to the outside at the same time as restricting the opening of the leg portion to the outside is required, and there is a problem that the mechanism becomes complicated mechanically.

In recent astronomical telescopes, the importance of assemblability at the observation site has been regarded as important, and the mount of the equatorial mount has been separated from the conventionally combined mount and tripod mount, and the tripod mount has been separated. So-called one-touch tripods, in which legs are attached in advance, are commercially available.

[0005] In the case of such a one-touch tripod, grease is applied to the top of the tripod mount in order to smoothly rotate the equatorial mount horizontally, and the grease may adhere to clothes, peripheral equipment, and the like when carried. For this reason, it is inconvenient to carry the camera with the tripod mount covered with a suitable cover.If the tripod mount has projections such as positioning pins on the top, it is dangerous to carry the tripod mount in an exposed state. There is also a problem that the pins may be damaged.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a tripod that supports a heavy object with high rigidity, and can be carried by surrounding the top of a gantry that supports the heavy object with legs. The purpose is to be.

[0007]

According to a first aspect of the present invention, there is provided a tripod in which a leg is rotatably connected to a base for supporting a heavy object, the direction in which the leg is closed. A stopper for restricting the leg from rotating more than a predetermined angle, and a tension applying means for applying a pulling force in a closing direction of the leg when the arm is rotated. I do. The second means of the present invention is:
The leg is rotatable to a position above the top of the gantry.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to a case where the present invention is applied to a tripod of an astronomical telescope. A tripod body 1 shown in FIG. 1 includes a gantry 2 and legs 3 arranged on three sides of the gantry 2, and each leg 3 is rotatably attached to a pivot portion 4 of the gantry 2. ing.

A projection 2a into which the mount of the equatorial mount is inserted is formed on the top of the gantry 2. The projection 2a includes the projection 2a.
Grease 5 is applied to the top of the gantry. An equatorial mount (not shown) is mounted on the top of the gantry 2 so as to be horizontally rotatable, and a lens barrel is mounted on the equatorial mount. It should be noted that the equatorial mount has a right ascension and declination biaxial rotation mechanism.

An abutment portion 2b which is inclined downward at a predetermined angle is formed at a lower portion of each pivot portion 4 of the gantry 2. A stopper portion 3a is formed on the upper portion of the leg portion 3 in correspondence with the striking portion 2b. When the leg portion 3 is turned in the closing direction (inside of the gantry), the stopper portion 3a is brought into contact with the striking portion 2b. Interfering with 2a, the leg 3 does not rotate any more.
Conversely, it can freely rotate in the direction in which the leg 2 is opened (outside the gantry), and can rotate up to the gantry 2 as shown in FIG. 2 to surround the top of the gantry 2 with the leg 3. It has become.

At the lower ends of the legs 3, hook locking portions 6 are provided, respectively, between which a turn buckle 7 is provided.
The hook portion of the connecting rod 8 provided with a hook is engaged. Then, each turn buckle 7 is rotated to apply a pulling force to the connecting rod 8 to apply a stress in the closing direction of the leg 3 to increase the rigidity of the leg 3. The material of the leg portion 3 is made of aluminum here, so that it can expand and contract in a multi-stage manner in the vertical direction.

When carrying the tripod body 1 described above, each leg 3 is rotated upward as shown in FIG. 2 and carried while the top of the gantry 2 is enclosed. In use, the leg 3 is rotated as shown in FIG. 1 until the stopper 3a of the leg 3 abuts against the pedestal abutting portion 2b, and then the connecting rod 8 is connected to each hook engaging portion 6, and the terminal The buckle 7 is rotated to apply a pulling force to the connecting rod 8. Thereafter, an equatorial mount is mounted on the top of the gantry 2, and a lens barrel and the like are mounted on the equatorial mount.

Although the above embodiment has been described with reference to a tripod of an astronomical telescope, the present invention can also be applied to a tripod for a camera, a tripod for various surveys, and the like. Further, in the above-described embodiment, the turn buckle 7 is used as a means for applying a pulling force to the leg 3, but it may be replaced with a spring or another elastic body. Further, the means for restricting the rotation of the leg 3 is not limited to the illustrated configuration. For example, instead of the abutting portion 2b on the gantry 2, a projection serving as an abutting portion may be provided on the leg 3 side. Good. Other details can be arbitrarily changed as needed.

[0014]

According to the present invention described above, it is possible to impart high rigidity to a tripod supporting a heavy object with a simple configuration, and to surround a top of a gantry supporting a heavy object with a leg. Since the device can be carried, problems such as adhesion of grease applied to the top portion are eliminated.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a tripod showing an embodiment of the present invention.

FIG. 2 is a schematic front view of the tripod folded state showing the embodiment of the present invention.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Tripod main body 2 Mount 2a Projection part for mounting equatorial mount 2b Abutment part 3 Leg part 3a Leg stopper part 4 Piston part 5 Grease 6 Hook locking part 7 Turn buckle 8 Connecting rod

Claims (2)

(57) [Scope of request for utility model registration] 1. A tripod in which a leg is pivotally connected to a gantry supporting a heavy object, wherein when the leg is rotated in a closing direction, the leg is prevented from rotating more than a predetermined angle. A tripod, and a tension applying means for applying a pulling force in a closing direction of the leg portion. 2. The tripod according to claim 1, wherein the leg is rotatable to a position above a top of the gantry.