JPS6324312Y2 - - Google Patents

Description

[Detailed explanation of the invention] Purpose of the invention This invention is a method for attaching a movie camera or video camera to a pan head on a tripod to take panoramic shots. This relates to a level adjuster that adjusts to bring out the level of .

Even if you attach a pan head to a tripod and place a camera, etc. on the tripod, you can level the camera etc. by vertically adjusting the pan head, but it is not possible to level the camera in one direction by adjusting the pan head alone. Even if you can, if you rotate the camera horizontally and point it in another direction, you will have to adjust the pan head each time to bring out the level, so if you are just taking still photos, you only need a pan head. However, panoramic photography is not possible.

A conventional level adjuster for panoramic photography is shown in FIG. FIG. 1 shows a longitudinal sectional view seen from the front. 1 in the figure is a mount to be attached to a tripod, the top surface of which is formed into a hemispherical concave surface, and there is a screw hole 2 in the center.
A tightening screw shaft 3 is screwed into the upper part of this screw hole 2, and the screw hole 2 is attached to a tripod at the lower part. Reference numeral 4 denotes a mount for attaching a pan head, the lower surface of which forms a hemispherical convex surface with the same curvature as the hemispherical concave surface of the tripod mount 1, and a hole 5 having a diameter several times the diameter of the tightening screw shaft 3 in the center thereof. There is,
There is a screw 6 for mounting the pan head in the center of the top surface. A tightening plate 7 forms a spherical plate inscribed in the back surface of the hemispherical convex surface of the pan head mount 4, and is fixed to the tightening screw shaft 3. The tightening screw shaft 3 is fixed to the tightening rod 8,
A knob 9 is attached to the tip of the tightening rod 8.

In the above configuration, by rotating the tightening rod 8 in the horizontal direction, the tightening screw shaft 3 is screwed into the screw hole 2 and moves up and down, and the pan head mount 4 is tightened and fixed to the tripod mount 1, or Release the tightening. When the tightening is released, the pan head mount 4 can rotate freely both vertically and horizontally within the movement range of the hole 5 with respect to the tripod mount 1, so that the pan head mount 4 can rotate freely in both vertical and horizontal directions within the movement range of the hole 5. The level of the upper camera can be adjusted freely. In this case, the level may be determined visually without a spirit level, or a small spirit level may be removably attached to a panhead or camera to more accurately determine the level.

However, in order to adjust the level of the camera using this conventional level adjuster, loosen the tightening rod 8, then move the pan head or camera by hand and adjust the level by looking at the scale or spirit level. It is tightened using the rear tightening rod 8. This method has the disadvantage that the level adjustment is rough, it is difficult to make fine adjustments, and the adjustment time is long. Furthermore, since there are many hemispherical parts in the structure and there are two spherical contact points, high precision machining is required and manufacturing costs are high.

An object of the present invention is to provide a level adjuster that allows fine adjustment of the level easily in a short time, has a simple and compact structure, and is inexpensive to manufacture.

Structure of the invention The main points of the structure of the invention are: a circular tripod mount that is attached to a tripod, a pan head mount that forms two inverted triangular slopes on the bottom surface of the bottom, and a pan head mount that attaches a pan head to the top surface.
Interposed between these two mounts, there is a rotation support that can freely rotate horizontally with respect to the tripod mount, and is hinge-supported with respect to the pan head mount, allowing it to swing in a fixed vertical direction. a base, two rollers (circular rods) arranged parallel to each other with an interval on the tripod mount and in contact with the two inverted triangular slopes of the tripod mount at right angles to each other, and the rotation cradle. two adjustment screw shafts that are screwed together and penetrated at two opposing locations on the side wall of the camera, contact each of the two rollers at right angles to slightly rotate the position of the rollers, and are removable from the pan head mount. It consists of a small spirit level attached to the

Hereinafter, the present invention will be specifically explained with reference to embodiments illustrated in the drawings. Figures 2 to 8 show one embodiment of the present invention, where Figure 2 is a plan view, Figure 3 is a front view, Figure 4 is a side view, and Figures 5 and 6 are two-dimensional views. 7 is a sectional view taken along line Y-Y in FIG. 2, and FIG. 8 is a plan view of the lower part of the apparatus viewed from above with the upper part of the apparatus removed.

Mainly in FIGS. 5 and 7, reference numeral 11 denotes a round metal tripod mount to be attached to a tripod, and there is a screw hole 12 in the center for attaching the tripod. 13
is a metal rotating pedestal, which has a rectangular outer shape as shown in FIG. It has a circular hole 14 for receiving and supporting the tripod, and is horizontally rotatable with respect to the tripod mount 11.
Reference numeral 15 indicates two metal rollers (circular rods) arranged in parallel on the tripod mount 11 with an interval between them. 16
are two adjustment screw shafts that are screwed into screw holes provided in the center of the opposing side walls of the rotating pedestal 13, and the tips thereof are in contact with the center of the outer periphery of the two rollers 15 at right angles. There is. 17 is a screw for preventing the adjustment screw 16 from coming off. A manual knob 18 is attached to the outer end of the adjustment screw shaft 16. Reference numeral 19 denotes two tension springs stretched between opposite ends of each of the two rollers 16.

Reference numeral 20 denotes a metal pan head mount, and as shown in FIG.
It is supported by a hinge shaft 21 provided at the center of the opposing side walls of the rotating pedestal 13, and an adjustment screw shaft 16
It can be vertically oscillated in the direction of , and has two inverted triangular slopes 22 formed on the bottom surface of the bottom that contact the two rollers 15 perpendicularly, and has a screw 23 for mounting the pan head at the center of the top surface. . A small spirit level 24 is removably attached to a mounting bracket 25 fixed to the side of the pan head mount 20. The two rollers 15 have both ends pulled together by springs 19, but the two slopes 2 of the pan head mount 20
Since the two rollers 15 are pressed together from above by the rollers 2, the two rollers 15 can be kept parallel and their rolling movement can be performed smoothly and accurately.

The level adjuster of the present invention can freely rotate a rotary pedestal 13 in the horizontal direction with respect to a tripod mount 11 fixed to a tripod, and also has two adjusting screw shafts 16 as shown in FIG. By loosening one and tightening the other, the two rollers 15 are moved in one direction, and the two slopes 22 are in contact with the rollers, respectively.
The pan head mount 20 hinge-supported by the rotary cradle 13 can be vertically slightly oscillated in the direction of the adjustment screw shaft 16 through the cradle.

The working relationship between the adjusting screw shaft 16 and the rollers 15 will be explained in more detail. For example, the right adjustment screw shaft 16
When loosened, its tip separates from the right roller 15 that is in contact with it, so this roller 15 is freed from the pressing force of the adjustment screw shaft 16, and the pan head mount is moved only by the slight tension of the spring 19. It is in contact with the right slope of No. 20. This contact force is weaker than the pressing force of the adjusting screw shaft 16, so if the left adjusting screw shaft 16 is tightened at the same time as the right adjusting screw shaft 16 is loosened, its tip presses the left roller 15 to the right, and this The left slope of the pan head mount 20 that is in contact with the pan head mount 20 is pressed to slightly rotate the pan head mount 20 clockwise, and at the same time, the right slope slightly rotates the right roller 15 that is in contact with it to the right. Make it move. As a result, the left and right rollers 15 move slightly to the right at the same time.

To adjust the level of the level adjuster, after fixing the level adjuster on the tripod, move the bubble in the eccentric direction (the direction in which the bubble moves away from the center) in the small level 24 attached to the pan head mount 20. Turn the rotary pedestal 13 by hand so that the adjustment screw shaft 16 faces, then loosen one of the two adjustment screw shafts 16,
Adjustment of the level of the pan head mount 20 is completed by tightening the other side and adjusting so that the bubble moves to the center. Since the pan head and camera are mounted on the pan head mount 20, the level of the camera can be obtained.

In the above embodiment, the rotary pedestal 13 and the pan head mount 20 are rectangular in shape, but the shape may be circular or other shapes.

Effects of the Invention As described above, with the present invention, the level can be finely adjusted by determining the direction of the two adjustment screw shafts and rotating the knob while looking at the attached small level, so the adjustment operation can be done quickly and easily. Also, the structure is the first
3. Requires high-precision machining like the conventional product shown in the figure.
It does not contain individual hemispherical parts, and each part has a simple structure and is easy to assemble, so it is small and sturdy.
And it is low cost.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional level adjuster.
Figures 2 to 8 show one embodiment of the present invention, where Figure 2 is a plan view, Figure 3 is a front view, Figure 4 is a side view, and Figures 5 and 6 are two-dimensional views. FIG. 7 is a cross-sectional view taken along line Y--Y in FIG. 2, and FIG. 8 is a plan view of the lower half of the device viewed from above with the upper half removed. 11... Tripod mount, 12... Screw hole for tripod mounting, 13... Rotating cradle, 15... Roller, 16...
Adjustment screw shaft, 18... Knob, 19... Spring, 20... Pan head mounting base, 21... Hinge shaft, 2
2...Inverted triangle 2 slope part, 23...Screw for mounting the pan head, 24...Small level.

Claims (1)

[Scope of utility model registration request] A metal tripod mount that is shaped like a circular trapezoid and has a screw hole for mounting the tripod at its center, and a concave dish-shaped metal tripod mount that is rotatably supported by being inscribed in the outer periphery of the tripod mount at the center of its bottom. A metal rotary pedestal having a circular hole and screw holes provided at two locations on the side wall on the horizontal axis passing through the vertical center axis of the rotary pedestal, each of which is fixedly screwed through and penetrates, and has an outer surface. two adjustment screw shafts with hand-cranked knobs at the ends;
Two metal rollers are arranged in parallel with an interval on the tripod mount so as to be perpendicular to the adjustment screw axis of the book and in contact with the tips thereof, and each of both ends of the two rollers. It is hinge-supported by two tension springs stretched between the two tension springs and a side wall of the rotary pedestal in a horizontal direction perpendicular to the axial direction of the adjusting screw, and can swing vertically in the axial direction of the adjusting screw; and a metal pan head mount having two inverted triangular slopes on the lower surface that are perpendicular to the two rollers and in contact with the outer periphery, and a pan head mounting screw at the center of the top surface, and the pan head mount. A level adjuster characterized in that it is equipped with a small spirit level that is removably attached to the.