JP2015166821A - Platform for optical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a platform for an optical instrument allowing for easily and stably performing low-angle photographing with the optical instrument.SOLUTION: A platform includes: a mounting plate 50 on which a television camera 1 is mounted; and a tilt mechanism 30 for supporting the mounting plate 50 movably in a tilt direction. The tilt mechanism 30 includes rail trestles 32 to which a first rail member 34 and a second rail member 36 are bonded in a triangular shape and which are disposed on both sides of the mounting plate 50. The mounting plate 50 includes: a first roller 52 that is engaged with the first rail member 34 and is guided and moved; and a second roller 54 that is engaged with the second rail member 36 and is guided and moved.

Description

  The present invention relates to a pan head for an optical device to which an optical device is attached.

  2. Description of the Related Art In general, there is known a pan head in which an optical device such as a camera or binoculars is placed on a tripod installed on the ground and an angle can be freely set in an intended direction of the optical axis of the optical device (Patent Document 1). ). Among these pan / tilt heads, the pan / tilt head for a camera that shoots a movie has a biaxial structure. By operating a bar (pan bar) linked to the camera, horizontal (pan) and vertical (tilt) The angle can be changed freely in the direction.

JP 2010-266612 A

  By the way, it may be necessary to perform low-angle shooting using a camera (optical device). If you try to shoot a low angle using a general mechanism with a tripod attached to the tripod, the camera position will be higher by the height of the tripod, and you will not be able to shoot at a sufficiently low position.

  It is also conceivable to place the camera directly on the floor and fix the camera with a wedge or sand bag at a predetermined tilt angle. However, this method has a problem that the optical axis angle is fixed and camera work in the tilt direction and pan direction cannot be performed.

  An exemplary object of an aspect of the present invention is to provide a pan head for an optical device that can easily perform low-angle shooting with an optical device.

According to one aspect of the invention,
A mounting plate on which optical equipment is mounted;
A tilt mechanism that supports the mounting plate so as to be movable in the tilt direction;
The tilt mechanism is
A rail mount in which the first rail member and the second rail member are joined in a triangular shape and disposed on both sides of the mounting plate;
A first member provided on the mounting plate and guided and moved by the first rail member;
And a second member that is provided on the mounting plate so as to be separated from the first member and that is guided by the second rail member and moves.

  According to an aspect of the present invention, stable low-angle shooting can be easily performed.

FIG. 1 is a side view of a pan head for optical equipment according to an embodiment. FIG. 2 is a plan view of a pan head for optical equipment according to an embodiment. FIG. 3 is a schematic diagram for explaining the operation of a pan head for optical equipment according to an embodiment. FIG. 4 is a view for explaining the apex angle of the rail mount. FIG. 5 is a diagram for explaining the adjustment of the pan head for the optical device based on the center of gravity of the optical device to be mounted.

  Reference will now be made to non-limiting exemplary embodiments of the invention with reference to the accompanying drawings.

  In the description of all attached drawings, the same or corresponding members or parts are denoted by the same or corresponding reference numerals, and redundant description is omitted. Also, the drawings are not intended to show relative ratios between members or parts unless otherwise specified. Accordingly, specific dimensions can be determined by one skilled in the art in light of the following non-limiting embodiments.

  In addition, the embodiments described below are examples, not limiting the invention, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  1 and 2 show a pan head for an optical apparatus which is an embodiment of the present invention.

  In the present embodiment, a television camera 1 will be described as an example of an optical device. Therefore, hereinafter, the optical camera pan head is referred to as a TV camera pan head 10. It should be noted that the application of the optical device pan head according to an embodiment of the present invention is not limited to the TV camera pan head 10, but also to other optical devices such as binoculars, a camera, and a movie camera. Applicable.

  The TV camera platform 10 is equipped with the TV camera 1 and supports the TV camera 1 when shooting. In particular, the television camera platform 10 according to the present embodiment is suitable for performing low-angle shooting with the television camera 1 as described later.

  The TV camera platform 10 includes a base 20, a tilt mechanism 30, a mounting plate 50, a pan mechanism 70, and the like.

  First, the base 20 will be described. The base 20 is installed on the top of the ground or floor when performing low-angle shooting. The tilt mechanism 30, the mounting plate 50, the pan mechanism 70, and the like are disposed on the base 20.

  The base 20 has three leg portions 21 </ b> A to 21 </ b> C and a disk portion 22. The three leg portions 21A to 21C are configured to extend in three directions at intervals of about 120 ° from the disk portion 22 disposed in the center.

  Thus, the base 20 can be stabilized in the installed state by extending the leg portions 21A to 21C in three directions. It should be noted that the intervals between the leg portions 21A to 21C do not necessarily need to be equiangular as long as the base 20 can be stabilized. Moreover, it is good also as a structure which made it the structure which can fold leg parts 21A-21C with respect to the disk part 22, and aimed at the improvement of portability.

  Horizontal adjustment screws 24 </ b> A to 24 </ b> C are provided at the distal ends of the leg portions 21 </ b> A to 21 </ b> C. A level 26 is disposed on a rail mount 32B described later. Therefore, the rail mounts 32A and 32B can be set horizontally by adjusting the horizontal adjustment screws 24A to 24C.

  Next, the tilt mechanism 30 will be described. The tilt mechanism 30 is disposed above the base 20 via a pan mechanism 70. The tilt mechanism 30 has rail mounts 32A and 32B and a bottom portion 38 for coupling the rail mounts 32A and 32B. The bottom 38 is a rectangular metal plate. The bottom portion 38 is also connected to the base 20 via a pan mechanism 70.

  The pair of rail mounts 32 </ b> A and 32 </ b> B are respectively erected on the side edges on the long side of the bottom 38. Each rail mount 32A, 32B includes first rail members 34A, 34B, second rail members 36A, 36B, and side plate portions 40A, 40B.

  In the following description, when the rail mounts 32A, 32B, the first rail members 34A, 34B, the second rail members 36A, 36B, and the side plate portions 40A, 40B are collectively referred to, the rail mount 32, the first The rail member 34, the second rail member 36, and the side plate portion 40 may be referred to.

  For example, each of the first rail member 34 and the second rail member 36 uses L-shaped steel having a substantially L-shaped cross section. One side of the first rail member 34 and the second rail member 36 made of L-shaped steel functions as a guide rail for rollers 52A, 52B, 54A, and 54B described later. In addition, the shape of the 1st and 2nd rail members 34 and 36 is not limited to L shape.

  The first rail member 34 and the second rail member 36 are joined at a predetermined angle θ (indicated by an arrow in FIG. 1). Therefore, the first rail member 34, the second rail member 36, and the bottom 38 are arranged in a triangular shape in front view.

  As will be described later, in this embodiment, the angle θ formed by the first rail member 34 and the second rail member 36 is θ = 90 °. The lengths of the first rail member 34 and the second rail member 36 are set equal. Therefore, the triangle formed by the first rail member 34, the second rail member 36, and the bottom 38 is a right-angled isosceles triangle.

  The side plate portion 40 is disposed inside the first rail member 34, the second rail member 36, and the bottom portion 38 that form a triangle. By providing the side plate portion 40, the strength of the rail mount 32 can be increased.

  Of the side plate portions 40A, 40B, one side plate portion 40A has a long hole 42 formed therein. The long hole 42 has a predetermined curvature. A tilt direction fixing screw 60 is inserted into the long hole 42.

  The tilt direction fixing screw 60 is attached to the mounting plate 50 and moves as the mounting plate 50 moves as will be described later. The long hole 42 has a shape that allows movement of the tilt direction fixing screw 60.

  Next, the mounting plate 50 will be described. The mounting plate 50 includes a plate body 51, first rollers 52A and 52B, second rollers 54A and 54B, first holders 56A and 56B, second holders 58A and 58B, a tilt direction fixing screw 60, and a counter arm. 62 etc.

  In the following description, when the first rollers 52A and 52B, the second rollers 54A and 54B, the first holders 56A and 56B, and the second holders 58A and 58B are collectively referred to, the first roller 52 is used. , Second roller 54, first holder 56, second holder 58.

  The plate body 51 has a rectangular shape in plan view as shown in FIG. The plate body 51 is sized so that the TV camera 1 can be placed on the plate body 51. The rail mounts 32 </ b> A and 32 </ b> B are arranged so as to face both side portions on the long side of the plate body 51.

  Each of the rollers 52 </ b> A, 52 </ b> B, 54 </ b> A, 54 </ b> B is disposed at the four corners of the plate body 51. Specifically, first holders 56A and 56B are disposed at both left ends of the plate main body 51 in the drawing, and the first rollers 52A and 52B are supported by the first holders 56A and 56B. ing.

  Similarly, second holders 58A and 58B are disposed at both ends on the right side of the plate main body 51 in the drawing, and the second rollers 54A and 54B are supported by the second holders 58A and 58B. . Accordingly, the first roller 52 and the second roller 54 are configured to be spaced apart from each other in the longitudinal direction of the mounting plate 50.

  The mounting plate 50 is mounted on the tilt mechanism 30 from above. In a state where the mounting plate 50 is mounted on the tilt mechanism 30, the first roller 52A engages with the first rail member 34A, the first roller 52B engages with the first rail member 34B, and the second The first roller 54A engages with the second rail member 36A, and the second roller 54B engages with the second rail member 36B.

  As a result, the first roller 52 moves along the first rail member 34, and the second roller 54 moves along the second rail member 36. Therefore, when the first roller 52 moves up along the first rail member 34 and the second roller 54 moves down along the second rail member 36, the mounting plate 50 is moved to the left side in the drawing. The end moves in the direction of arrow A1 in the figure, and the right end in the figure moves (swings) in the direction of arrow B2 in the figure.

  Conversely, the first roller 52 moves down along the first rail member 34 and the second roller 54 moves up along the second rail member 36, whereby the left side of the mounting plate 50 in the figure. 1 moves in the direction indicated by arrow A2 in FIG. 1, and the right end moves (swings) in the direction indicated by arrow B1 in the figure.

  Therefore, when the television camera 1 is attached to the attachment plate 50, the television camera 1 performs a tilt operation by moving the attachment plate 50 in this way. In the following description, the movement of the mounting plate 50 in the directions of the arrows A1 and A2 and the directions of the arrows B1 and B2 is referred to as a tilt operation.

  The tilt direction fixing screw 60 is screwed to the central position of the side wall of the plate body 51 through the long hole 42 formed in the side plate portion 40A. The tilt direction fixing screw 60 moves (swings) with the tilting operation of the mounting plate 50, but the long hole 42 is formed to correspond to the movement locus of the tilt direction fixing screw 60. Therefore, when the tilt direction fixing screw 60 moves inside the elongated hole 42, the chilling operation of the mounting plate 50 is ensured.

  Further, by tightening the tilt direction fixing screw 60, the side plate portion 40A and the plate body 51 are relatively pressed against each other, and thereby the movement of the mounting plate 50 is restricted. Accordingly, the mounting plate 50 is positioned at a desired arbitrary tilt angle while the tilt direction fixing screw 60 is loosened, and then the tilt direction fixing screw 60 is fastened to fix the mounting plate 50 at the desired tilt angle. be able to.

  The counter arm 62 adjusts the position of the combined center of gravity of the TV camera 1 and the mounting plate 50 when the TV camera 1 is mounted on the mounting plate 50. The counter arm 62 is attached to the first holder 56 </ b> A using an arm attachment portion 64. In the present embodiment, the counter arm 62 is disposed only on the first holder 56A. However, the counter arm 62 may be disposed on all or a part of the other holders 56B, 58A, 58B.

  The counter arm 62 is configured such that one or a plurality of counters 66 can be mounted on the upper part. Further, the counter arm 62 is configured to be adjustable in angle with respect to the first holder 56A. Therefore, by changing the weight of the counter arm 62 attached to the counter arm 62 and the angle with respect to the first holder 56A, the position of the combined center of gravity of the television camera 1 and the attachment plate 50 can be adjusted.

The pan mechanism 70 is provided between the base 20 and the tilt mechanism 30. The pan mechanism 70 is disposed on the upper portion of the disk portion 22. The pan mechanism 70 has a rotation shaft (not shown in the drawing), and the upper end portion of the rotation shaft is fixed to the bottom portion 38 of the tilt mechanism 30. This rotation shaft is erected at the center position of the disk portion 22. By this pan mechanism 70, the tilt mechanism 30 can be rotated with respect to the base 20. Therefore, when the tilt mechanism 30 rotates with respect to the base 20 with the television camera 1 mounted on the mounting plate 50, the TV camera 1 also rotates with respect to the base 20. This makes it possible to rotate the TV camera 1 in the pan direction.

  Further, a pan direction fixing screw 44 is disposed on the bottom portion 38 constituting the tilt mechanism 30. The pan direction fixing screw 44 is provided on the bottom portion 38 so as to be able to advance and retract. Further, by tightening the pan direction fixing screw 44, the lower end portion of the pan direction fixing screw 44 is pressed into contact with the disk portion 22. Accordingly, the mounting plate 50 is positioned in the desired pan direction while the pan direction fixing screw 44 is loosened, and the pan direction fixing screw 44 is tightened thereon to fix the mounting plate 50 in the desired pan direction. be able to.

  Next, a method of using and operating the camera platform head 10 having the above-described configuration will be described.

  In order to shoot the TV camera 1 using the TV camera platform 10, the legs 21A to 21C are opened, and the TV camera 1 is placed on the ground or the floor surface (hereinafter referred to as the ground) on which the shooting is performed. A pan head 10 is installed. Subsequently, the TV camera 1 is mounted on the installed TV camera platform 10. The TV camera 1 may be mounted on the ground or the like after the TV camera 1 is mounted on the TV camera platform 10 in advance.

  When the TV camera platform 10 is installed on the ground or the like, the horizontal adjustment screws 24A to 24C disposed on the legs 21A to 21C are adjusted while watching the level 26, and the TV camera 1 (mounting plate 50) is adjusted. Adjust so that it is level. By performing this adjustment, the television camera 1 can be reliably and easily adjusted to a horizontal state even when the shooting position is uneven.

  Subsequently, the pan direction fixing screw 44 is loosened and the TV camera 1 (tilt mechanism 30 and mounting plate 50) is rotated with respect to the base 20 using the pan mechanism 70 to position the TV camera 1 in a desired pan direction. To do. When positioning of the TV camera 1 in the pan direction is completed, the pan direction fixing screw 44 is tightened to fix the TV camera 1 in the desired pan direction.

  When positioning in the pan direction is completed, the tilt mechanism 30 is used to position the television camera 1 in the tilt direction.

  FIG. 3 is a diagram for explaining a positioning operation in the tilt direction of the television camera 1 by the television camera platform 10. FIG. 3 shows an example in which the television camera 1 is mounted on the camera platform 10 so that the imaging lens 2 of the television camera 1 is on the left side in the drawing.

  FIG. 3A shows a state where the TV camera 1 is horizontal (referred to as a horizontal state). When the first roller 52 is moved up along the first rail member 34 from the horizontal state and the second roller 54 is moved down along the second roller 54, it is shown in FIG. Thus, the mounting plate 50 moves. Thereby, the imaging lens 2 moves in the direction of the arrow A1, and the rear part of the television camera 1 moves in the direction of the arrow B2. FIG. 3C shows a state where the mounting plate 50 has moved to a limit position where the imaging lens 2 faces upward.

  On the other hand, when the first roller 52 is moved down along the first rail member 34 from the horizontal state, and the second roller 54 is moved up along the second roller 54, FIG. Thus, the imaging lens 2 moves in the direction of arrow A2, and the rear part of the television camera 1 moves in the direction of arrow B1.

  In this way, the first and second rollers 52 and 54 move along the first and second rail members 34 and 36, and the mounting plate 50 moves (swings) along with this, so that the television camera is moved. 1 can be moved in the tilt direction. At this time, it is desirable that the range in which the television camera 1 can be tilted (that is, the movable range of the mounting plate 50) is wide from the viewpoint of shooting.

  A configuration in which the movable range of the mounting plate 50 in the TV camera platform 10 can be increased will be described with reference to FIG.

  First, attention is paid to the lengths of the first rail member 34 and the second rail member 36. The rollers 52 and 54 move along the rail members 34 and 36. Therefore, if the lengths of the rail members 34 and 36 are different, the movable range is determined by the short rail member. Therefore, it is desirable that the lengths of the rail members 34 and 36 are equal.

  Further, it is desirable that the angle θ (hereinafter referred to as apex angle θ) formed by the first rail member 34 and the second rail member 36 is set to 90 ° as shown in FIG.

  As shown in FIG. 4B, when the apex angle θ is smaller than 90 ° (FIG. 4B shows an example of θ = 60 °), the rotation center of the first roller 52 is If the line connecting the rotation centers of the second rollers 54 is perpendicular to the first rail member 34 or the second rail member 36, the mounting plate 50 cannot move any further. Therefore, when the apex angle θ is smaller than 90 °, the mounting plate 50 cannot climb up to the apex of the triangle.

  As shown in FIG. 4C, when the apex angle θ is larger than 90 ° (FIG. 4C shows an example of θ = 120 °), the mounting plate 50 can move up to the apex of the triangle. This is because the range becomes smaller.

  On the other hand, when the apex angle is 90 ° as shown in FIG. 4A, the mounting plate 50 can climb up to the apex of the triangle, and the theoretically maximum movable region can be 45 °. Even if the mounting plate 50 is largely inclined as shown in FIG. 4A, for example, the mounting plate 50 can be mounted by incorporating a friction mechanism or a clutch mechanism in the bearing portion of each roller 52A, 52B, 54A, 54B. 50 can be stationary.

  The first roller 52 and the second roller 54 are provided at the four corner positions on the rail mount 32 (first and second rail members 34 and 36) having a right isosceles triangle shape as in the present embodiment. When the mounting plate 50 is mounted, the mounting plate 50 stops in a horizontal state as shown in FIG. 3A unless the center of gravity G of the mounting plate 50 is taken into consideration.

  Here, the position of the center of gravity G of the television camera 1 and the posture of the mounting plate 50 will be considered. As shown in FIG. 5A, when the center of gravity G of the TV camera 1 is at a low position, when the mounting plate 50 is mounted on the rail mounts 32A and 32B, the mounting plate 50 is stably in a horizontal state. .

  On the other hand, as shown in FIG. 5B, when the center of gravity G of the television camera 1 is high, the mounting plate 50 is in an unstable state. Then, the mounting plate 50 is tilted until the position of the center of gravity G is slightly shifted from the balanced position in the direction of the arrow A2 or the arrow B2 until one of the rollers 52 and 54 reaches the ground or the floor surface.

  However, what actually contributes to the movement of the mounting plate 50 is the combined center of gravity of the center of gravity G of the television camera 1 and the center of gravity of the mounting plate 50. The center of gravity G of the TV camera 1 is basically difficult to change. However, the mounting plate 50 can adjust the position of the center of gravity by providing the counter 66.

  In the television camera platform 10 according to the present embodiment, the mounting plate 50 is provided with a counter arm 62 as shown in FIG. 1, and the counter 66 is appropriately mounted on the counter arm 62 so that the mounting plate 50 The center of gravity position is adjusted.

  The counter arm 62 is configured so that a single counter or a plurality of counters 66 can be mounted. A plurality of counters 66 having different weights are also prepared. Further, the counter arm 62 can be adjusted in angle with respect to the first holder 56 </ b> A (the mounting plate 50) by an arm mounting portion 64.

  Thus, by appropriately adjusting the angle of the counter arm 62 and the amount of the counter 66, the mounting plate 50 can be made stationary with respect to the rail mount 32 not only at the horizontal position but also at an arbitrary tilt angle.

  In order to position the television camera 1 in the tilt direction using the tilt mechanism 30 configured as described above, first, the angle of the counter arm 62 and the amount of the counter 66 are adjusted. In this adjustment, the mounting plate 50 on which the television camera 1 is actually mounted is moved, and the angle of the counter arm 62 and the amount of the counter 66 are adjusted so that the mounting plate 50 stops at any tilt angle. By completing this adjustment process, the mounting plate 50 can be stopped at an arbitrary position.

  In the TV camera platform 10 according to the present embodiment, the TV camera 1 is positioned between the rail mount 32A and the rail mount 32B in a state where the TV camera 1 is mounted. That is, in the conventional pan head, the TV camera is mounted on the top of the pan head. However, in the TV camera pan head 10 of this embodiment, a part of the TV camera 1 is inside the TV camera pan head 10. It is the composition located in.

  The first and second rollers 52 and 54 that support the mounting plate 50 so as to be movable with respect to the rail mount 32 are positioned higher than the upper surface of the mounting plate 50 by the first and second holders 56 and 58. It is arranged. Therefore, the mounting plate 50 can be moved at a position lower than the rollers 52 and 54, that is, at a position close to the base 20.

  Thus, by using the TV camera platform 10 according to this embodiment, the TV camera 1 can perform extremely low-angle shooting. In addition, the TV camera platform 10 can be easily installed on the ground or the like, and low-angle shooting can be easily performed in a short time. Furthermore, the camera angle intended by the photographer can be smoothly realized even when shooting at a low angle.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments described above, and various modifications are possible within the scope of the gist of the present invention described in the claims. It can be modified and changed.

1 TV camera 10 TV camera platform 20 Base 21A, 21B, 21C Leg 22 Disc 24A, 24B, 24C Leveling screw 26 Level 30 Tilt mechanism 32 Rail mount 32A, 32B Rail mount 34, 34A, 34B 1 rail member 36, 36A, 36B 2nd rail member 38 bottom part 40A, 40B side plate part 42 long hole 44 pan direction fixing screw 50 mounting plate 52, 52A, 52B first roller 54, 54A, 54B second roller 56, 56A, 56B First holder 58, 58A, 58B Second holder 60 Tilt direction fixing screw 62 Counter arm 64 Arm mounting portion 66 Counter 70 Pan mechanism

Claims (5)

A mounting plate on which optical equipment is mounted;
A tilt mechanism that supports the mounting plate so as to be movable in the tilt direction;
The tilt mechanism is
A rail mount in which the first rail member and the second rail member are joined in a triangular shape and disposed on both sides of the mounting plate;
A first member provided on the mounting plate and guided and moved by the first rail member;
A second member provided on the mounting plate and spaced apart from the first member, and guided and moved by the second rail member;
A pan head for optical equipment, comprising:   2. The pan head for an optical apparatus according to claim 1, further comprising a pan mechanism for rotating the rail mount in the pan direction.   3. The optical device according to claim 1, wherein the mounting plate includes a mounting member that mounts an adjustment weight that adjusts a balance of the optical device when the optical device is tilted by the tilt mechanism. Pan head.   4. The pan head for an optical apparatus according to claim 1, wherein the first member and the second member are rollers. 5.   5. The platform for an optical apparatus according to claim 1, wherein the rail mount has an angle of 90 ° between the first rail member and the second rail member. 6.

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