JPS6126714Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to an improvement of a pan head for positioning and fixing relatively heavy equipment such as a television camera.

Technical background of the invention In general, a pan head is a device that can be mounted on a tripod and fixed by rotating it in the vertical and horizontal directions, such as a camera or surveying instrument. There is a conventional pan head for fixing the camera in a predetermined position as shown in FIG.

In FIG. 1, a pan head 1 consists of a rotating plate 2 that rotates in the horizontal direction and a fixed plate 3 that supports the rotating plate 2. This fixed plate 3 is attached to a leg 4 of a tripod or the like. It is fixedly supported on the top via a support mechanism 5 such as a hinge. On the other hand, on the rotation plate 2, there is a vertical rotation part 7 for rotating the television camera 6 in the vertical direction (arrow A), and a vertical rotation adjustment for adjusting the amount of rotation of the vertical rotation part 7 in the vertical direction. A section 8 is provided.

As shown in the exploded perspective view of FIG. 2, the rotating plate 2 of the pan head 1 has a rotating shaft 2a disposed at the center of rotation of the rotating plate 2, which is formed on a fixed plate 3. Fitting hole 3
a, and can be rotated horizontally with respect to the fixed plate 3.

In addition, since the pan head 1 supports relatively heavy equipment such as a television camera, the fixing means for positioning and fixing the rotating plate 2 to the fixed plate 3 is usually a bolt. The fixing plate 3 is tightened and fixed.

For this tightening and fixing, conventionally, as shown in FIG.
Arc-shaped elongated holes 2b corresponding to b are formed respectively, and bolts 9 are screwed into the female threaded portions 3b through the elongated holes 2b, thereby fixing the rotating plate 2 to the fixed plate 3. .

Problems with the Background Art By the way, as described above, the rotating plate 2 and the fixed plate 3 are positioned and fixed using bolts 9, and the bolts 9 are fixed through the long holes 2b formed in the rotating plate 2. Since the rotating plate 2 and the fixed plate 3 are screwed into the internal threaded portion 3b formed on the plate 3 and tightened and fixed, the rotating plate 2 cannot be rotated when positioning in the horizontal direction (arrow B in Fig. 2). The moving angle was limited by the elongated hole 2b, and there was a drawback that positioning at any horizontal position was not possible.

Purpose of the invention The present invention was made in view of the above-mentioned problems, and is a pan head that supports relatively heavy equipment such as a television camera, and is designed to improve the degree of freedom in horizontal position adjustment. The purpose is to provide

Summary of the invention In order to achieve this purpose, the present invention has a pan head consisting of a rotating plate and a fixed plate, in which the width of the opening surface of one of the plates is wider than the width of the internal cross section along the circumferential direction of either plate. A small groove is formed in an annular shape, and a bolt head or a nut of a fastener consisting of a bolt and a nut screwed into the bolt is accommodated in the groove in a slidable but non-rotatable manner. This pan head is constructed by interposing the plate without a groove between the plate and the fixing plate between the bolt head and the nut.

Examples of ideas The pan head according to the present invention will be described in detail below.

FIG. 3 shows an exploded perspective view of the pan head 10 according to the present invention, and the same parts as in FIGS. 1 and 2 are designated by the same reference numerals.

The pan head 10 consists of a rotating plate 11 that rotates in the horizontal direction (arrow C) and a fixed plate 12 that is supported and fixed to the legs 4 shown in FIG.

A fitting hole 11a for a bolt 9 constituting one of the fasteners is formed at a predetermined position of the rotating plate 11. This bolt 9 is screwed into a nut 14 disposed in a groove 13 of a fixed plate 12, which will be described later, to tighten and fix the rotary plate 11 to the fixed plate 12.

On the other hand, the fixing plate 12 includes an enlarged plan view of the fixing plate 12 shown in FIG.
As shown in Figure b, an annular groove 13 is formed around the groove 13.
The width ₁ of the opening surface 13a is the width ₂ of the internal cross section.
It is formed smaller than. For this reason, the nut 14 accommodated so as to slide inside this groove 13
When tightening and fixing with the bolts 9, the screws are locked in the groove portion 13 without falling off from the opening surface 13a of the groove portion 13.

Further, the nut 14 has an oval outer shape so as not to rotate within the groove 13 when screwed into the bolt 9.

In addition, in the above embodiment, the outer shape of the nut 14 is not limited to the above embodiment, but is as shown in FIG.
The outer shape of the nut 20 may be circular, as shown in the enlarged plan view of the fixing plate 12 in FIG. However, in this case, when screwing the bolt 9, the nut 2 is inserted into the groove 13.
0 rotates on its own axis and cannot be tightened and fixed, so in order to prevent this rotation, the rotating plate 1 is rotated as shown in Figure b.
Pins 30, 31 for preventing rotation are provided protrudingly at predetermined positions near the lower surface of the fitting hole 11a of the bolt 9 formed in the nut 20, and the pins 30, 31 are attached to the nut 20.
Fitting holes 20a and 20b are formed in which the nut 20 is fitted, thereby preventing the nut 20 from rotating and positioning the nut 20 in the fitting hole 11a of the bolt 9 formed in the rotary plate 11 more reliably.

In addition, the reference numerals 40 and 5 in FIG. 4a and FIG. 5a
Reference numerals 0 denote insertion holes formed on the lower surface of the fixing plate 12, through which the nuts 14 and 20 are inserted into or taken out from the groove 13.

In the above embodiment, the groove portion 13 and the nuts 14 and 20 are formed and arranged on the fixed plate 12 side, but the present invention is not limited to the above embodiment, and the groove portion 13 and the nuts 14 and 20 are formed on the rotating plate 11 side. 13 and nuts 14 and 20 are formed and arranged, and the fixing plate 12
A fitting hole for the bolt 9 to be screwed into the nuts 14 and 20 may be formed on the side.

Further, in the above embodiment, the nut is housed in the groove 13, but the present invention is not limited to the above embodiment. It is also possible to have a configuration in which Of course, in this case, it is necessary to make the bolt head oval or to provide rotation prevention means as shown in FIG.

Effects of the Invention As described above, the present invention includes forming an annular groove in either one of the rotating plate and the fixed plate constituting the pan head, and allowing the slider to slide inside the groove. Because the rotating plate accommodates a nut or bolt head, the rotating plate can be positioned and fixed at any angle relative to the fixed plate, and the pan head can therefore be positioned in any direction when adjusting the horizontal angle. can be fixed.

[Brief explanation of the drawing]

Figure 1 is a side view showing an object placed on a tripod head, Figure 2 is an exploded perspective view showing the configuration of a conventional camera head, and Figure 3 is a pan head according to the present invention. FIG. 4a is an enlarged plan view showing an embodiment of the fixing plate side of the pan head according to the present invention; FIG. 4b is a sectional view along AA thereof; FIG. FIG. 2B is an enlarged plan view of the fixing plate side showing another embodiment of the nut accommodated in the groove formed in the groove, and FIG. 1, 10... Pan head, 2, 11... Rotating plate, 3,
12...Fixing plate, 4...Legs, 5...Support mechanism,
6...TV camera, 7...Vertical rotating section, 8...
Vertical rotation adjustment section, 9... Bolt, 13... Groove section,
14,20...Natsuto.

Claims (1)

[Scope of utility model registration request] An annular groove is formed along the circumferential direction of one of the plates of the pan head consisting of a rotating plate and a fixed plate, and the width of the opening surface is smaller than the width of the internal cross section. Of a fastener consisting of a bolt and a nut screwed onto the bolt, the bolt head or nut is accommodated in a slidable but non-rotatable manner, and
A pan head characterized in that the one of the rotating plate and the fixed plate, which does not have a groove, is interposed between the bolt head and the nut.