JP4444339B2 - Pan head - Google Patents

Description

  The present invention relates to a lighting device for illuminating a subject such as photography, television, movie shooting, etc., various cameras for photographing them, or a fixed device such as an arbitrary measurement device, and a stand or a tripod by adjusting the depression angle or elevation angle. It is related to the pan head for attaching to the head.

2. Description of the Related Art Conventionally, a pan head on a stand or a tripod is generally used in many cases for attaching a lighting device, various cameras, a measuring device, or the like so that the depression angle or elevation angle can be adjusted.
As these pan heads, when a fixed device such as a lighting fixture is relatively small and light, for example, as shown in Patent Document 1, a support base supported on a stand is used. By attaching an attachment member for attaching a pipe-like base material provided at the base of the lighting fixture so that it can be tilted directly with a screw rod oriented in the horizontal direction, the lighting fixture can be tilted. However, when the lighting fixture or the like is large and has a relatively large weight, the fixing force is insufficient with only the screw rod, so that a stronger tilt angle adjusting mechanism is required.

A pan head as shown in FIG. 11 that addresses such a problem is already known. When the mounting member 53 for mounting the base of a lighting fixture or the like is fastened and fixed to the support base 52, the pan head is attached to the mounting member 53 that is pivotally supported by the support base 52 by the mounting shaft 54. A disc (partial disc) 53b concentric with the shaft 54 is provided integrally, and an arc groove 55 centering on the axis of the mounting shaft 54 is provided in the periphery of the disc 53b, and is erected on the support base 52. The threaded rod 56 is inserted into the arc groove 55, and a nut 57 having a handle is configured to fasten the groove edge of the arc groove 55 to the support base 52 via a friction member 58. And the main-body part 53a of the attachment member 53 which attaches fixing devices, such as a lighting fixture, to the said disk 53b is integrally connected.
In the figure, 59 is a fixing hole provided in the main body portion 53a of the mounting member 53 for inserting and fixing a pipe-like base material provided at the base of a lighting fixture or the like, and 60 is a handle for tightening the fixing hole. A nut with a mark is shown.

According to the pan head of such a configuration, the mounting member 53 such as a lighting fixture is mounted at two positions spaced apart from each other, that is, the pivot support position where the mounting member 53 can be tilted with respect to the support base 52, and the support base 52 Since the mounting member 53 is fixed to the support base 52 at two positions including the tightening position of the arc groove edge of the disk 53b that is tightened by the nut 57 screwed into the screw shaft 56. The mounting member 53 can be more firmly fixed in a predetermined inclined state.
However, since the main body 53a of the mounting member 53 is integrally connected via the disk 53b, the disk 53b itself needs to maintain the posture of the mounting member 53, and at the same time, The mounting member 53 provided with the mounting member 53 needs to be strong enough to support the weight of a fixing device such as a lighting fixture that may be mounted on the mounting member 53. The mounting member 53 including the disk 53b is required. Will become larger.

  Moreover, when the main body portion 53a of the mounting member 53 is integrally connected to the disk 53b and the size thereof increases, the mounting member 53 pivotally supports the mounting shaft 54 on the support base 52. Since there will be a relatively large eccentric weight part around it, the fixing device is attached to the attachment member 53 at the stage of gripping the pan support 52 and attaching it to a stand or tripod. Even when the nut 57 is not sufficiently tightened with the screw rod 56, the heavy mounting member 53 may rotate and lower around the mounting shaft 54 depending on the position of the pan head. .

In that case, in addition to the danger caused by the lowering of the attachment member 53 that is a heavy object, the attachment member 53 is often put in hand, and when the arc grooves 55 are exposed on both sides of the screw rod 56, The fingertip of the hand may be in the arc groove 55, and in that case, the fingertip portion in the groove may be cut between the edge of the arc groove 55 and the nut 57. .
Further, when a fixing device such as a lighting fixture having a large weight is fixed to the mounting member 53, for example, when the inclination angle of the lighting fixture is to be adjusted, the nut 57 is not tightened with respect to the screw rod 56. Due to looseness or the like, the lighting fixture may suddenly rotate and descend around the mounting shaft 54. In this case as well, if the fingertip of the hand is in the arc groove 55, the groove There is a possibility of cutting the fingertip portion inside.

Japanese Utility Model Publication No. 5-29462

  A technical problem of the present invention is a pan head for mounting a fixed device such as the above-described lighting fixture on a support base with adjustable depression or elevation angle, and a mounting member for the fixed device that is pivotally supported by the support base. The disk is fixed, an arc groove is provided on the periphery of the disk, a screw rod erected on the support base is inserted into the arc groove, and the groove edge of the arc groove is formed with a nut provided with a handle. What is configured to be fastened to the support base is to eliminate the increase in the size of the mounting member when the fixing device such as the lighting fixture is supported through the main body portion of the mounting member provided around the disk. .

  Another technical problem of the present invention is that a disk is fixed to an attachment member of the fixing device, a screw rod standing on a support base is inserted into an arc groove in a peripheral portion of the disk, and a handle is provided. In the case where the groove edge of the arc groove is tightened with a nut, the mounting member rotates inadvertently and enters the arc groove regardless of whether or not a fixing device that is a heavy object is attached. An object of the present invention is to provide a pan head that can prevent an accident that cuts a fingertip portion.

  The camera platform according to the present invention for solving the above-described problem is a platform in which a mounting member for fixing a mounting base portion of a fixed device can be mounted on a support table by adjusting a depression angle or an elevation angle of the fixed device. A mounting shaft of the mounting member with respect to the support base is rotatably supported by penetrating in a horizontal direction with respect to the support base, and the mounting shaft is attached to a tip portion of the mounting shaft penetrating the support base. A disc concentric with the shaft is fixed, and an arc groove centered on the axis of the mounting shaft is provided in the periphery of the disc, and a screw rod erected on the support base is attached to the arc groove of the disc. And a nut provided with a handle is screwed into a screw portion at the tip thereof, so that the groove edge of the arc groove in the disk can be fastened and fixed to the support base.

  In a preferred embodiment of the pan / tilt head according to the present invention, in a state in which no fixing device is fixed to the mounting member, the weight distribution of the mounting member itself is an eccentricity that rotates the mounting member around the axis of the mounting shaft. It is comprised as what does not have a weight part, or it is comprised as what the gravity center of the said attachment member exists on the axial center of the said attachment shaft.

In another preferred embodiment of the pan / tilt head according to the present invention, the disc is concentric with the disc and is relatively rotatable with respect to the disc, and on the side opposite to the support platform side of the disc. A circular hole provided in a peripheral portion of the cover plate by attaching a cover plate formed so as to always cover the circular arc groove in FIG. The cover plate as well as the disc is tightened and fixed to the support base by the nut.
In that case, the said support stand which pinches | interposes the said disk between the cover plates on the said attachment axis | shaft can be comprised as what has a form which always hides the circular arc groove on this disk.

  Furthermore, in another preferred embodiment of the pan head according to the present invention, the pan head is for adjusting and attaching a depression angle or an elevation angle in an illumination direction in a lighting fixture for photographing as a fixed device, Fixing hole for inserting and fixing a pipe-like base material provided in the base portion of the lighting fixture and extending in the direction opposite to the illumination direction along the central axis of the illumination direction in the main body portion provided with the attachment shaft in the attachment member And the fixing hole is configured to be opened in a direction perpendicular to the axis of the mounting shaft.

  According to the pan head of the present invention described in detail above, the fixing device such as the luminaire is a pan head that is attached to the support base with adjustable depression angle or elevation angle, and is supported on the support base. A disk is fixed to the mounting member of the fixing device, an arc groove is provided in the periphery of the disk, a screw rod erected on the support base is inserted into the arc groove, and the nut with a handle is used to In the structure in which the groove edge of the arc groove is fastened to the support base, the large size of the mounting member when the fixing device such as the luminaire is supported through the main body portion of the mounting member provided around the disk. Can be eliminated. Further, the disk is fixed to the mounting member of the fixing device, the screw rod standing on the support base is inserted into the circular arc groove in the periphery of the circular disk, and the groove edge of the circular groove is formed with the nut provided with the handle. Accidents where the attachment member rotates inadvertently and enters the arc groove and cuts the fingertip part, regardless of whether the fixing member is attached to a heavy fixture. Can be prevented.

  The drawing shows a first embodiment of a pan head according to the present invention. This pan head is used to mount a fixed device 10 such as a lighting fixture for illuminating a subject such as a photograph, a television, a movie shoot, etc. on a stand or a tripod by adjusting the depression angle or elevation angle. As shown in FIG. 5, a dowel 21 is fitted on the mounting object 1 such as the stand or tripod, and a support base 2 that is supported rotatably around the axis of the dowel 21, and the lighting fixture or the like. An attachment member 3 is provided at the base of the fixed device 10 and is attached to the support base 2 by adjusting the depression angle or elevation angle of the fixed device 10.

As shown in FIGS. 5 and 6, the lighting fixture for photographing shown as an example of the fixed device 10 is provided on the mounting base thereof and extends in a direction opposite to the illumination direction along the central axis of the illumination direction. The main bone pot 12 is fixed to the outer surface of the pipe base 11 and the four main bones 13 are connected to the main bone pot 12 so as to be openable and closable. A light bulb socket 15 is attached to the distal end of the pipe shaft 14 that can be inserted into the pipe shaft 14, and the energizing cord 16 is led out to the proximal end side through the pipe shaft 14 and the pipe-shaped base material 11. The main shaft 13 is connected to a support shaft 17 fixed to the distal end of the main frame 13 so that the main frame 13 can be opened and closed, and the front end of the main frame 18 is connected to the middle of the main frame 13 so as to be rotatable. The bone 13 can be opened and closed like an umbrella. It is.
In the figure, 5 is a light source, 6 is a reflection sheet that is stretched around the main bone 13 to diffusely reflect the light from the light source 5, and 7 is detachable with a hook-and-loop fastener between the ends of the main bone 13 when the main bone 13 is opened. Fig. 1 shows a diffuser screen that is stretched to diffuse light from a light source.

  The lighting fixture having the above-described configuration is such that, as shown in FIGS. 5 and 6, the pipe shaft 14 is placed inside the reflecting sheet 6 from the state in which the main bone 13 and the reflecting sheet 6 are folded. In the state in which the energizing cord 16 is pulled out from the base material 11, the scapula 17 is moved to a position close to the main skeleton 12, and the skeleton 18 strongly pushes the main skeleton 13. If the reflecting sheet 6 is expanded elastically in the same manner as the umbrella, and the outer end of the pipe shaft 14 is pushed into the base material 11 from the state shown in FIGS. As a result, the fulcrum wheel 17 is pushed away from the main bone wheel 12, and the main bone 13 is elastically folded in the same manner as the umbrella, and at the same time, the energizing cord 16 and the pipe shaft 14 are coupled together. It is drawn into the material 11.

  Meanwhile, as clearly shown in FIGS. 1 to 4, the mounting member 3 has a mounting shaft 32 on a main body portion 31 provided with a fixing hole 31 a for fixing the pipe-shaped base material 11 of a lighting fixture. Provided integrally, the mounting shaft 32 penetrates the support hole 22 of the support base 2 in the horizontal direction and is rotatably supported. The fixing hole 31a is formed in a direction orthogonal to the axis of the mounting shaft 32, so that when the mounting member 3 is rotated around the mounting shaft 32, the luminaire is mounted on the support base. 2, specifically, the depression angle or elevation angle of the central axis in the illumination direction of the luminaire can be adjusted.

  A disc 33 as shown in FIGS. 7 (a) and 7 (b) is fixed to a tip portion of the mounting shaft 3 of the mounting member 3 passing through the support base 2 with a screw 34 concentrically with the mounting shaft 32. A circular arc groove 35 centering on the axis of the mounting shaft 32 is provided in the periphery of the disk 33. The screw rod 24 erected on the support base 2 is inserted into the circular arc groove 35 of the disk 33.

  Further, the disk 33 is formed in a disk shape concentric with the disk 33 and is rotatable relative to the disk 33, and the arc groove 35 on the side of the disk 33 opposite to the support base 2 side. A cover plate 40 (see FIG. 8) formed to cover the cover plate 40 is attached, and a screw 42 inserted through the center hole 41 of the cover plate 40 is screwed into the mounting shaft 32 of the mounting member 3. Although it is attached to the attachment shaft 32, the cover plate 40 is attached to be rotatable relative to the disc 33 as described above. Accordingly, the cover plate 40 always completely covers the circular arc groove 35 appearing on the surface of the disc 33 opposite to the support base 2 side.

  Then, the screw rod 24 erected on the support base 2 is inserted not only into the circular arc groove 35 of the disc but also into a circular hole 43 provided in the peripheral portion of the cover plate 40, and the tip of the screw rod 24 is inserted. A nut 45 having a handle 46 is screwed into the part. The nut 45 provided with the handle 46 is for tightening and fixing the groove edge of the circular arc groove 35 in the disk 33 to the support base 2. In order to stabilize the tightening and fixing, the support base 2 Friction members 47 and 48 fitted around the threaded rod 24 are interposed between the outer surface of the cover plate 40 and the outer surface of the cover plate 40, and the friction members are brought into contact with the outer surface of the cover plate 40. A pair of disc springs 49 are interposed between the nut 48 and the nut 45.

  As can be seen from FIGS. 1 and 4, the mounting member 3 has an attachment shaft 32 integrally connected to the main body portion 31, and the mounting shaft 32 is pivotally supported by the support base 2. Unlike the pan head, the main body portion 31 is not attached to the periphery of the disk 33, so that the weight distribution of the attachment member 3 itself can be reduced even when the fixing device 10 is not fixed. In other words, the mounting member 3 is formed so that the center of gravity of the mounting member 3 is substantially on the axis of the mounting shaft 32.

  With such a configuration, since no other member is attached to the disc 33, the rotatable cover plate can be provided on the disc 33, and the attachment member 3 is attached to the attachment shaft 32. By constructing it so that it does not have an eccentric weight part around it, when carrying out operations such as holding the support base 2 of this pan head and mounting it on a stand or a tripod, it will suddenly depend on the posture of the pan head. The heavy attachment member 3 does not rotate around the attachment shaft 32, and the arc groove 35 prevents the fingers from being damaged.

  The disk 33 to be fastened with the nut 45 is preferably tightened with the nut 45 attached to the handle 46. Therefore, the arc groove 35 of the disk 33 has a certain groove width to increase the tightening area. As a result, there is a possibility that the fingertip may inadvertently enter the arc groove 35 when adjusting the inclination of the lighting fixture. The threaded rod 24 is inserted into the circular arc groove 35 of the circular plate 33 and the circular hole 43 provided in the peripheral portion of the cover plate 40, thereby rotating the circular plate 33 together with the mounting shaft 32 in the mounting member 3 of the lighting fixture. By doing so, even if the arc groove 35 rotates with respect to the screw rod 24, the arc groove 35 is always covered with the cover plate 40, so that it is possible to prevent the fingers from being damaged.

  In the illustrated first embodiment, as can be seen from FIG. 3, when the disk 33 is rotated in either the left or right direction on the surface of the disk 33 facing the support 2, an arc is formed. Although the end of the groove 35 is exposed to the outside from the support base 2, there is little possibility that a finger will enter the arc groove 35 on the support base 2 side, and the presence of the support base 2 causes the fingertip to enter the arc groove 35. If it is difficult to enter, but the risk is also prevented, it is assumed that the support base 2A has a form in which the arc groove 35 on the circular plate 33 is always concealed like the support base 2A indicated by a chain line in FIG. What is necessary is just to comprise.

9 and 10 show a second embodiment of the pan / tilt head according to the present invention. The pan head of the second embodiment is different from the first embodiment mainly in the form of the support base 2B, and the other configurations are the same as in the first embodiment. Corresponding portions are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.
The support base 2B in this second embodiment is formed by forming a portion where the dowel 21 at the lower end and an opening portion of the support hole 22 through which the mounting shaft 32 passes are formed by bending a material having a constant cross section. Assuming that the base end has a threaded portion, the base end is inserted into a hole provided in the support base 2B, and a nut 21a is screwed into the base 2B to be fixed to the support base 2B, thereby comparing with the first embodiment. This reduces the weight of the support and simplifies the configuration.

It is a partial fracture front view showing the 1st example of the pan head concerning the present invention. It is a partially exploded front view of the same Example. It is a side view of the said Example. It is a top view of the said Example. It is a perspective view which shows the usage condition of the pan head which concerns on this invention. It is sectional drawing which shows the structure of the lighting fixture in the said Example. (A) And (b) is the front view and sectional drawing of a disc fixed to an attachment member. (A) And (b) is the front view and sectional drawing of a cover board which adheres to the said disk. It is a partially broken front view which shows 2nd Example of the pan head which concerns on this invention. It is a side view of the same Example. It is a perspective view which shows the structure of a known pan head.

Explanation of symbols

2 Support base 3 Mounting member 10 Fixing device 24 Threaded rod 32 Mounting shaft 33 Disc 35 Arc groove 40 Cover plate 43 Circular hole 45 Nut 46 Handle

Claims (6)

An attachment member for fixing the attachment base of the fixed device on the support base is a pan head that can be attached by adjusting the depression angle or elevation angle of the fixed device,
A mounting shaft of the mounting member with respect to the support base is rotatably supported by penetrating the support base in a horizontal direction, and a circle concentric with the mounting shaft is provided at a tip portion of the mounting shaft that passes through the support base. The plate is fixed, and an arc groove centered on the axis of the mounting shaft is provided in the periphery of the disc,
The screw rod standing on the support base is inserted into the circular arc groove of the disk, and a nut with a handle is screwed onto the screw portion at the tip, and the groove edge of the circular groove on the disk is used as the support base. It was possible to tighten and fix
A pan head characterized by that. In a state where the fixing device is not fixed to the mounting member, the weight distribution of the mounting member itself does not have an eccentric weight part that rotates the mounting member around the axis of the mounting shaft.
The pan / tilt head according to claim 1. The center of gravity of the mounting member is on the axis of the mounting shaft;
The pan / tilt head according to claim 1. A cover plate is attached to the disc so as to be concentric with the disc and rotatable relative to the disc and to always cover the arc groove on the side opposite to the support base side of the disc. The screw rod standing on the support base and inserted into the circular arc groove of the disc is inserted into the circular hole provided in the peripheral portion of the cover plate, and the cover plate is supported together with the disc by the nut. Tightened and fixed to the base,
The pan / tilt head according to any one of claims 1 to 3. The support base that sandwiches the disk between the cover plate on the mounting shaft is configured to have a form that always hides the arc groove on the disk,
The pan / tilt head according to claim 4. The pan head is for adjusting and attaching the depression angle or elevation angle of the illumination direction in the lighting apparatus for photographing as a fixed device,
Fixing by inserting and fixing a pipe-like base material provided at the base of the lighting fixture and extending in the direction opposite to the illumination direction along the central axis of the illumination direction to the main body portion provided with the attachment shaft in the attachment member A hole is provided, and the fixing hole is opened in a direction orthogonal to the axis of the mounting shaft.
The pan / tilt head according to claim 4.

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