JP2010079155A - Projector suspension device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector suspension device that can adjust the direction/attitude of a projector and is readily made thin. <P>SOLUTION: The projector suspension device includes a first base plate 100; a first intermediate plate 200, which can be locked rotatably to the first base plate 100, a second intermediate late 300 which can be locked rotatably to the first intermediate plate 200; and a second base plate 400 which can be locked rotatably to the second intermediate plate 300. When they are assembled one over another, the direction of the projector can be adjusted in a yaw direction, by rotating the first intermediate plate 200 on a first axis of rotation and in a pitch direction by rotating the second intermediate plate 300 on a second axis of rotation; and the attitude of the projector can be adjusted in a roll direction, by rotating the second base plate 400 on a third axis of rotation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projector ceiling suspension apparatus.

  2. Description of the Related Art Conventionally, as a projector ceiling device for suspending a projector from a ceiling, a projector ceiling device including an orientation / attitude adjustment device including a ball joint mechanism is known (for example, see Patent Document 1).

  According to the conventional projector ceiling suspension device, since the orientation / attitude adjustment device including the ball joint mechanism is provided, the orientation and orientation of the projector can be adjusted.

  In this specification, “adjusting the orientation / attitude of the projector” means adjusting the projector in the yaw direction, the pitch direction, and the roll direction. Here, the yaw direction refers to the direction in which the optical axis of the projector is swung left and right, the pitch direction refers to the direction in which the optical axis of the projector is swung up and down, and the roll direction refers to the direction in which the projector is rotated about the optical axis.

JP 2002-72352 A

  By the way, in recent ceiling-mounted projectors, there is a demand to install the projector as close to the ceiling as possible by reducing the thickness of the projector ceiling device. This is because if the projector is installed close to the ceiling, not only can the indoor space be used widely, but there is also an aesthetic advantage that the installation mechanism is difficult to see.

  However, in the adjustment mechanism using the conventional ball joint mechanism, not only the ball joint mechanism but also the mechanism that connects the ball joint mechanism and the ceiling or the mechanism that connects the ball joint mechanism and the projector is thick. There is a problem that it is difficult to reduce the thickness of the projector suspension device.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a projector ceiling suspension device that can adjust the orientation / attitude of the projector and can be easily reduced in thickness. With the goal.

  The inventor of the present invention has realized a reduction in the thickness of the projector ceiling device by assembling four plate-like members in layers as shown below.

  The projector ceiling suspension device according to the present invention is rotatably locked to the first base plate using a first base plate and a first rotary shaft member having a first rotary shaft perpendicular to the main surface of the first base plate. The first intermediate plate using a first rotary plate and a second rotary shaft member having a second rotary shaft perpendicular to the first rotary axis and parallel to the main surface of the first intermediate plate. A second intermediate plate that can be rotatably locked to the second rotation plate and a third rotation shaft member that has a third rotation axis that is orthogonal to the second rotation axis and parallel to the main surface of the second intermediate plate. And a second base plate that can be rotatably locked with respect to the second intermediate plate, and the first base plate using the first rotating shaft member, the second rotating shaft member, and the third rotating shaft member. The first intermediate play When the second intermediate plate and the second base plate are stacked and assembled in this order, the orientation of the projector can be adjusted to the yaw direction by rotating the first intermediate plate around the first rotation axis. The orientation of the projector can be adjusted in the pitch direction by rotating the second intermediate plate about the second rotation axis, and the attitude of the projector can be adjusted by rotating the second base plate about the third rotation axis. It can be adjusted in the roll direction.

  For this reason, according to the projector ceiling suspension device of the present invention, the first rotation shaft member, the second rotation shaft member, and the third rotation shaft member are used to adjust the yaw direction, pitch direction, and roll direction of the projector. By assembling the one base plate, the first intermediate plate, the second intermediate plate, and the second base plate so as to be rotatable, the orientation / posture of the projector can be adjusted.

  Further, according to the projector ceiling hanger of the present invention, it is easy to reduce the thickness by assembling the four plates of the first base plate, the first intermediate plate, the second intermediate plate, and the second base plate.

  In addition, according to the projector ceiling suspension device of the present invention, since it is not necessary to use a ball joint mechanism, a relatively inexpensive projector ceiling suspension device is realized.

  In the projector ceiling suspension device of the present invention, the projector has a contact portion and an operation portion that come into contact with the first intermediate plate, and can be swingably locked with respect to the intermediate plate using the first rotating shaft member. And a locking undulation portion in which the amount of undulation gradually changes along the rocking direction of the lock lever is formed on the contact surface of the first intermediate plate with the lock lever. With the relative rotational position of the first base plate and the first intermediate plate adjusted to a desired rotational position, the lock lever is swung so that the abutment portion of the lock lever is moved to the first intermediate plate. It is preferable that the relative rotational position of the first base plate and the first intermediate plate can be fixed at a desired rotational position by strongly abutting against the undulating portion for locking.

  With this configuration, after adjusting the direction of the projector to the yaw direction, the lock lever is swung so that the abutment portion of the lock lever strongly abuts against the locking undulation portion of the first intermediate plate. For example, the orientation of the projector can be fixed at a desired rotational position. In this specification, rocking means rotating an object at an angle of less than 180 degrees.

  In the projector ceiling suspension device of the present invention, the first intermediate plate includes a first bearing tab and a second bearing tab for receiving the second rotating shaft member, the first intermediate plate, and the second intermediate plate. A first upright portion and a second upright portion used to adjust the relative rotational position of the second intermediate plate, and the second intermediate plate has a third bearing tab and a fourth for receiving the second rotary shaft member. A bearing tab; a third upright portion and a fourth upright portion used for adjusting a relative rotational position of the first intermediate plate and the second intermediate plate; and the first upright portion and the second upright portion. Each of the two standing portions is formed with a first elongated hole and a second elongated hole that are parallel to each other and whose major axis direction forms a first angle with the main surface of the first intermediate plate. The upright portion and the fourth upright portion respectively A third long hole and a fourth long hole that are parallel to each other and whose major axis direction forms a second angle different from the first angle with the main surface of the second intermediate plate, A first lock screw is passed through the long hole and the third long hole, a second lock screw is passed through the second long hole and the fourth long hole, and the relative relationship between the first intermediate plate and the second intermediate plate By adjusting a lock nut to each of the first lock screw and the second lock screw in a state where the general rotation position is adjusted to a desired rotation position, the first intermediate plate and the second intermediate plate can be relatively moved. It is preferable that a stable rotational position can be fixed at a desired rotational position.

  With this configuration, the first lock screw and the second lock screw are passed through the first long hole and the second long hole, and these lock screws are slid along the long axis of each long hole so that the first intermediate plate and the second It becomes possible to adjust the direction of the projector in the pitch direction by relatively rotating the two intermediate plates.

  Also, after adjusting the orientation of the projector in the pitch direction, the lock screws are fixed to the long holes by tightening the lock nuts to the first lock screw and the second lock screw, respectively, and the orientation of the projector is fixed at a desired rotational position. It becomes possible to do.

  In the projector ceiling suspension device of the present invention, the second base plate is formed with a fifth bearing tab and a sixth bearing tab for receiving the third rotating shaft member, and the second intermediate plate has the second base plate. A recess for receiving a three-rotating shaft member is formed, the third rotating shaft member is brought into contact with the recess, and is pivotally supported by the fifth bearing tab and the sixth bearing tab, and the second intermediate plate The second intermediate plate by tightening a shaft set screw into at least one end of the third rotary shaft member in a state where the relative rotational position of the second base plate is adjusted to a desired rotational position. It is preferable that the relative rotational position between the base plate and the base plate can be fixed at a desired rotational position.

  By configuring in this way, after adjusting the direction of the projector in the roll direction, the shaft fixing screw is strongly tightened to the shaft end portion of the third rotating shaft member, and the relative relationship between the second base plate and the second intermediate plate is set. By fixing the rotational position, the orientation of the projector can be fixed at a desired rotational position.

  In the projector ceiling suspension device of the present invention, it is preferable that the first long hole and the second long hole have an inner surface on the side far from the main surface of the first intermediate plate processed into a sawtooth shape.

  With this configuration, the first lock screw and the second lock screw can be stably held in the saw-tooth valley even during the adjustment operation of the projector in the pitch direction. As a result, the second intermediate plate can be kept at a desired angle with respect to the first intermediate plate, and the operation of easily adjusting the orientation of the projector in the pitch direction is facilitated.

  In the projector ceiling suspension device of the present invention, it is preferable that the base portions of the first lock screw and the second lock screw have a polygonal column shape for preventing idling.

  By configuring in this way, it is possible to prevent each lock screw from spinning in the respective long holes, and the work of tightening these lock screws is facilitated.

  In the projector ceiling apparatus of the present invention, it is preferable that the first base plate, the first intermediate plate, the second intermediate plate, and the second base plate are each formed by processing one metal plate.

  With this configuration, a relatively inexpensive projector ceiling suspension device is realized.

  Hereinafter, a projector ceiling suspension apparatus according to the present invention will be described based on the embodiments shown in the drawings.

[Embodiment]
FIG. 1 is an overall perspective view of a projector ceiling suspension apparatus 10 according to the embodiment.
FIG. 2 is an exploded perspective view of the projector ceiling apparatus 10 according to the embodiment.
FIG. 3 is a diagram illustrating the projector ceiling device 10 according to the embodiment. 3A is a front view of the projector ceiling device 10, and FIG. 3B is a cross-sectional view of the projector ceiling device 10 taken along line AA in FIG.

FIG. 4 is a diagram illustrating the upper unit 512 of the projector ceiling apparatus 10 according to the embodiment. 4A is an exploded perspective view of the upper unit 512, and FIGS. 4B and 4C are assembly perspective views of the upper unit 512. FIG. However, the rocking position of the lock lever 570 is different between FIG. 4B and FIG.
FIG. 5 is a view for explaining the lower unit 514 of the projector ceiling suspension apparatus 10 according to the embodiment. FIG. 5A is an exploded perspective view of the lower unit 514, and FIG. 5B is an assembled perspective view of the lower unit 514.

FIG. 6 is a view for explaining the projector ceiling apparatus 10 according to the embodiment. 6A is a perspective view showing a state before the upper unit 512 and the lower unit 514 are assembled, and FIG. 6B is a perspective view showing a state after the upper unit 512 and the lower unit 514 are assembled. FIG. 6C is a perspective view showing a state in which the projector ceiling device 10 is rotated in the pitch direction from the state shown in FIG.
FIG. 7 is a diagram for explaining a method for adjusting and fixing the projector ceiling suspension apparatus 10 according to the embodiment. FIG. 7A is a front perspective view in a state where the projector P is attached to the projector ceiling device 10, and FIG. 7B is a rear perspective view.

  As shown in FIGS. 1 and 2, the projector ceiling suspension apparatus 10 according to the embodiment includes a first base plate 100 and a first rotary shaft member 520 having a first rotary shaft orthogonal to the main surface 112 of the first base plate. A first intermediate plate 200 that can be rotatably locked to the first base plate 100, and a second rotation axis that is orthogonal to the first rotation axis and parallel to the main surface 212 of the first intermediate plate. A second intermediate plate 300 that can be rotatably locked with respect to the first intermediate plate 200 using the second rotation shaft member 530, and a main surface 312 of the second intermediate plate that is orthogonal to the second rotation axis. And a second base plate 400 that can be rotatably locked to the second intermediate plate 300 using a third rotation shaft member 540 having a parallel third rotation shaft.

  In addition, the projector ceiling suspension device 10 according to the embodiment uses the first rotation shaft member 520, the second rotation shaft member 530, and the third rotation shaft member 540, so that the first base plate 100, the first intermediate plate 200, and the second intermediate shaft are used. When the plate 300 and the second base plate 400 are assembled in this order and assembled, the orientation of the projector P can be adjusted to the yaw direction by rotating the first intermediate plate 200 around the first rotation axis, and the second rotation. The orientation of the projector P can be adjusted in the pitch direction by rotating the second intermediate plate 300 about the axis, and the attitude of the projector P can be adjusted in the roll direction by rotating the second base plate 300 about the third rotation axis. It is possible (see FIG. 7).

  Further, the projector ceiling suspension apparatus 10 according to the embodiment includes a contact portion 576 and an operation portion 574 that contact the first intermediate plate 200, and the first rotation plate member 520 is used for the first intermediate plate 200. A lock lever 570 that can be slidably locked is further provided, and a lock on which the undulation amount gradually changes along the swing direction of the lock lever 570 is provided on the contact surface of the first intermediate plate 200 with the lock lever 570. The undulation portion 250 is formed, and the lock lever 570 is swung to contact the lock lever 570 in a state where the relative rotation position of the first base plate 100 and the first intermediate plate 200 is adjusted to a desired rotation position. The first base plate 100 and the first intermediate plate 200 are brought into strong contact with the locking undulations 250 of the first intermediate plate 200 by the portion 576. The relative rotational position of a possible fixed to a desired rotational position.

  In the projector ceiling suspension apparatus 10 according to the embodiment, as shown in FIG. 2, the first intermediate plate 200 includes a first bearing tab 232 and a second bearing tab 236 for receiving the second rotating shaft member 530, It has the 1st standing part 222 and the 2nd standing part 226 which are used in order to adjust the relative rotation position of the 1st intermediate plate 200 and the 2nd intermediate plate 300. The second intermediate plate 300 adjusts the relative rotational positions of the third and fourth bearing tabs 332 and 336 for receiving the second rotating shaft member 530, and the first intermediate plate 200 and the second intermediate plate 300. A third upright portion 322 and a fourth upright portion 326 that are used for the purpose.

  Further, the first upright portion 222 and the second upright portion 226 are respectively parallel to each other and have a first long hole 224 and a second long hole 228 whose major axis direction is parallel to the main surface 212 of the first intermediate plate 200. The third elongate portion 322 and the fourth elevating portion 326 are respectively parallel to each other, and the third long hole 324 has a major axis direction forming an angle of 20 degrees with the main surface 312 of the second intermediate plate 300. And the 4th long hole 328 is formed.

  The major axis of the first elongated hole 224 and the major axis of the second elongated hole 228 and the major axis of the third elongated hole 324 and the major axis of the fourth elongated hole 328 have been described as 20 degrees. This angle is not limited to 20 degrees, and can be appropriately set in the range of 5 degrees to 45 degrees from the viewpoint of ease of adjustment. In addition, although the directions of the long axis of the first long hole 224 and the long axis of the second long hole 228 are parallel to the main surface 212 of the first intermediate plate, they may be inclined.

  In the projector ceiling suspension apparatus 10 according to the embodiment, the first lock screw 552 is passed through the first long hole 224 and the third long hole 324, and the second lock screw 554 is passed through the second long hole 229 and the fourth long hole 328. The lock nut 550 is tightened to each of the first lock screw 552 and the second lock screw 554 with the relative rotation position of the first intermediate plate 200 and the second intermediate plate 300 adjusted to a desired rotation position. Thus, the relative rotational position of the first intermediate plate 200 and the second intermediate plate 300 can be fixed at a desired rotational position.

  In the projector ceiling suspension apparatus 10 according to the embodiment, the second base plate 400 includes a fifth bearing tab 422 and a sixth bearing tab 426 for receiving the third rotating shaft member 540, as shown in FIGS. The second intermediate plate 300 is formed with a recess 314 for receiving the third rotation shaft member 540. The third rotation shaft member 540 is brought into contact with the recess 314, and the fifth bearing tab 422 and At least one end of the third rotating shaft member 540 is pivotally supported by the sixth bearing tab 426 and the relative rotational position of the second intermediate plate 300 and the second base plate 400 is adjusted to a desired rotational position. The relative rotation position of the second intermediate plate 300 and the base plate 400 can be fixed to a desired rotation position by tightening the shaft set screw 542 to the shaft. That.

  It should be noted that the sleeve 560 is attached to each of the places where the third rotating shaft member 540 comes into contact with the two recesses 314.

  In the projector ceiling suspension apparatus 10 according to the embodiment, as shown in FIG. 3, when the first base plate 100 and the second base plate 400 are assembled so as to be parallel, the second base plate 400 of the first base plate 100 is used. The distance T between the far surface and the surface of the second base plate 400 far from the first base plate 100 is 40 mm, and is provided for inserting the operation portion side end portion of the lock lever 570 and the first rotating shaft member 520. The distance D1 from the center of the lever shaft hole 572 is 180 mm, the distance D2 between the first upright portion 222 and the second upright portion 226 is 280 mm, and the distance between the fifth bearing tab 422 and the sixth bearing tab 426 D3 is 160 mm.

  In the projector ceiling suspension apparatus 10 according to the embodiment, as shown in FIG. 2, the inner surfaces of the first long holes 224 and the second long holes 228 far from the main surface 212 of the first intermediate plate are the number of teeth. Is processed into a sawtooth shape of 6.

  In the projector ceiling suspension apparatus 10 according to the embodiment, as shown in FIG. 2, the base portion 553 of the first lock screw 552 and the base portion 555 of the second lock screw 554 have a polygonal column shape for preventing idling.

  In the projector ceiling suspension device 10 according to the embodiment, the first base plate 100, the first intermediate plate 200, the second intermediate plate 300, and the second base plate 400 are each formed by processing one metal plate.

  The procedure for suspending and installing the projector P on the ceiling using the projector ceiling suspension apparatus 10 according to the embodiment is as follows.

1. Preparation of Upper Unit 512 First, as shown in FIG. 4A, the first rotating shaft member 520 is passed through the first shaft hole 122, the second shaft hole 240, and the lever shaft hole 572, and further the first rotating shaft member. By locking the lock nut 522 at one end of the 520, the first base plate 100, the first intermediate plate 200, and the lock lever 570 are locked so as to be rotatable around the first rotation axis.

  After locking in this manner, the first raised portion 120 and the circular recess 216 are fitted, so that the first intermediate plate 200 rotates stably around the first rotation axis with respect to the first base plate 100.

  The assembly of the members locked by the first rotating shaft member 520 is referred to as the upper unit 512 (see FIG. 4B).

  In the upper unit 512, the lock lever 570 is swung to a predetermined position (hereinafter referred to as a lock position), and the contact portion 576 of the lock lever 570 is brought into strong contact with the undulation portion 250 for locking, whereby the first base plate. The relative rotational position of 100 and the first intermediate plate 200 can be fixed at a desired rotational position (see FIG. 4C).

  The screw long holes 130 provided in the first base plate 100 are used for fixing the upper unit 512 to the ceiling (not shown) through, for example, wood screws (not shown).

2. Preparation of Lower Unit 514 Next, as shown in FIG. 5 (a), the third bearing member 540 has a fifth bearing hole 424 provided in the fifth bearing tab 422 and a sixth bearing provided in the sixth bearing tab 426. The third rotary shaft member 540 is brought into contact with the recess 314 while passing through the hole 428, and the shaft set screw 542 is stopped at the end of the third rotary shaft member 540. Thereby, the second intermediate plate 300 can be locked to the second base plate 400 so as to be rotatable around the third rotation axis.

  The assembly of these members locked by the third rotating shaft member 540 is referred to as the lower unit 514 (see FIG. 5B).

  The screw round hole 414 provided in the second base plate 400 is used for fixing the lower unit 514 to the mounting surface of the projector P (not shown) through, for example, a screw (not shown).

3. Next, as shown in FIG. 6A, the projector P (not shown) to which the lower unit 514 is attached is lifted, and the lower unit 514 is previously mounted on the ceiling (not shown). Close to the upper unit 512 that has been fixed to

  In this state, the first bearing hole 234 is brought close to the third bearing hole 334, the second bearing hole 238 is brought close to the fourth bearing hole 338, the second rotary shaft member 530 is passed through these four bearing holes, and The shaft set screw 532 is fixed to the end of the second rotating shaft member 530. Thus, the second intermediate plate 300 is locked to the first intermediate plate 200 so as to be rotatable around the second rotation axis.

  Next, as shown in FIG. 6B, the first long hole 224 is brought close to the third long hole 324, the second long hole 228 is brought close to the fourth long hole 328, and the first lock screw 552 is moved to the first long hole. The second lock screw 554 is passed through the second long hole 228 and the fourth long hole 328 through the hole 224 and the third long hole 324, respectively.

  Next, as shown in FIG. 6C, the first intermediate plate 200 is rotated with respect to the second intermediate plate 300 by sliding the lock screws along the long axes of the long holes. Thereby, the direction of the projector can be adjusted in the pitch direction.

3. 3. Connection of upper unit 512 and lower unit 514 Adjustment / fixation of direction / attitude of projector P Next, the projector P is activated to project an image on the screen, and the direction / attitude of the projector P is adjusted. The procedure will be described below with reference to FIG.

  As shown in FIG. 7, the orientation of the projector P is adjusted to the yaw direction Y by rotating the projector P around the first rotation axis. After adjusting to the desired rotation position, the lock lever 570 is rocked strongly to the lock position. As a result, the first base plate 100 and the first intermediate plate 200 are restricted from rotating, and as a result, the rotation position of the projector P in the yaw direction is fixed.

  Next, the projector P is rotated around the second rotation axis by sliding the lock screws along the long holes, and the orientation of the projector P is adjusted in the pitch direction Pi. At this time, each lock screw is fitted between any one of the saw teeth 260. After adjusting the orientation of the projector P to a desired rotational position, the lock nut 550 is tightened to the lock screws 552 and 554, respectively. As a result, the lock screws 552 and 554 are fixed in the long holes, restricting the mutual rotation of the first intermediate plate 200 and the second intermediate plate 300, and as a result, fixing the rotational position of the projector P in the pitch direction. can do.

  Here, since each lock screw can be fitted only between any teeth of the saw blade 260, the rotational position where the projector P can be fixed becomes discontinuous. However, since fine adjustment in the pitch direction can be performed by the optical adjustment function of the projector P, there is no problem even if the rotational positions that can be fixed are discontinuous.

  Next, the orientation of the projector P is adjusted to the roll direction R by rotating the projector P around the third rotation axis. After the adjustment to the desired rotational position, the sleeve 560 is firmly brought into contact with the fifth bearing tab 422 and the sixth bearing tab 426 by tightening the shaft set screw 542 to the end of the third rotating shaft member 540. As a result, the rotation of the second intermediate plate 300 and the second base plate 400 is restricted, and as a result, the rotational position of the projector P in the roll direction is fixed.

  By such a procedure, the projector P can be installed by being suspended from the ceiling in the correct orientation and posture.

  According to the projector ceiling suspension apparatus 10 according to the embodiment configured as described above, adjustments relating to the yaw direction, pitch direction, and roll direction of the projector P are performed with respect to the first rotation shaft member 520, the second rotation shaft member 530, and the first rotation shaft member. By adjusting the first base plate 100, the first intermediate plate 200, the second intermediate plate 300, and the second base plate 400 by using the three-rotating shaft member 540, the orientation / attitude of the projector P can be adjusted. Is possible.

  In addition, according to the projector ceiling suspension apparatus 10 according to the embodiment, the four plates of the first base plate 100, the first intermediate plate 200, the second intermediate plate 300, and the second base plate 400 are assembled in a stacked manner, thereby reducing the thickness. Becomes easier.

  In addition, according to the projector ceiling apparatus 10 according to the embodiment, since it is not necessary to use a ball joint mechanism, a relatively inexpensive projector ceiling apparatus is realized.

  Further, according to the projector ceiling suspension apparatus 10 according to the embodiment, after the orientation of the projector is adjusted to the yaw direction, the lock lever 570 is swung so that the contact portion 576 of the lock lever 570 is locked to the first intermediate plate 200. By strongly abutting the undulating portion 250, the orientation of the projector P can be fixed at a desired rotational position.

  Further, according to the projector ceiling suspension device 10 according to the embodiment, the first lock screw 552 and the second lock screw 554 are passed through the first long hole 224 and the second long hole 228, and these lock screws 552 and 554 are passed through the long holes. It is possible to adjust the orientation of the projector P in the pitch direction by sliding along the long axis and relatively rotating the first intermediate plate 200 and the second intermediate plate 300.

  Further, according to the projector ceiling suspension device 10 according to the embodiment, after adjusting the direction of the projector P in the pitch direction, the lock nuts 550 are tightened into the first lock screw 552 and the second lock screw 554, respectively. It is possible to fix the projector P in a desired rotational position by fixing it to each elongated hole.

  Further, according to the projector ceiling suspension apparatus 10 according to the embodiment, after adjusting the direction of the projector P to the roll direction, the shaft fixing screw 542 is strongly tightened to the shaft end portion of the third rotating shaft member 540 to thereby adjust the second base plate. By fixing the relative rotational position of 400 and the second intermediate plate 300, the orientation of the projector P can be fixed at a desired rotational position.

  Further, according to the projector ceiling suspension device 10 according to the embodiment, the operator can perform the operation of swinging the lock lever 570 at a position far from the first rotating shaft member 520 without being bothered by the presence of the projector P. And the operation | work which tightens the lock nut 550 and the shaft set screw 532,542 can be implemented.

  Further, according to the projector ceiling suspension device 10 according to the embodiment, the first lock screw 552 and the second lock screw 554 can be stably fastened to the valley of the saw tooth 260 even during the adjustment operation in the pitch direction of the projector. As a result, the second intermediate plate 300 can be kept at a desired angle with respect to the first intermediate plate 200, and the operation of easily adjusting the orientation of the projector P in the pitch direction is facilitated.

  Further, according to the projector ceiling apparatus 10 according to the embodiment, since the number of teeth processed into a sawtooth shape is 6, the angle of the second intermediate plate 300 can be adjusted with a necessary and sufficient resolution, and the projector P Can be adjusted more easily in the pitch direction.

  Further, according to the projector ceiling suspension device 10 according to the embodiment, the bases 553 and 555 of the lock screws 552 and 554 have a polygonal column shape for preventing slipping, so that the lock screws 552 and 554 are respectively It is possible to prevent idle rotation in the long hole, and the operation of tightening the lock nut 550 to the lock screws 552 and 554 becomes easy.

  Further, according to the projector ceiling suspension device 10 according to the embodiment, the first base plate 100, the first intermediate plate 200, the second intermediate plate 300, and the second base plate 400 are formed by processing a metal plate in this way. Therefore, a relatively inexpensive projector ceiling device 10 is realized.

  The projector ceiling suspension device according to the present invention has been described above based on the embodiments. However, the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

  In the above embodiment, the first base plate 100 is fixed to the ceiling and the second base plate 400 is fixed to the projector P. However, the present invention is not limited to this. The present apparatus may be rotated 180 degrees up and down to fix the second base plate to the ceiling and to fix the first base plate to the projector P. In this way, when assembling by turning 180 degrees up and down, the saw blade indicated by reference numeral 260 in FIG. 2 is provided on the inner surface of the first elongated hole and the second elongated hole closer to the main surface of the first base plate. Is preferred. Moreover, it is preferable that the recessed part shown as the code | symbol 314 in FIG. 2 reverses the formation direction of a recessed part up and down.

  In the above embodiment, in order to fix the second rotating shaft member and the third rotating shaft member, the shaft set screw is fastened and fixed, and the first lock screw, the second lock screw, and the first rotating shaft member are fixed. For this purpose, the lock nut is fastened and fixed. However, for the purpose of “preventing shaft slippage” or “preventing rotation by applying pressure in the axial direction”, there are various means other than tightening a shaft set screw or a lock nut. For example, a female screw may be cut in the axial direction at one end of the shaft member, and a male screw with a flange may be screwed to the female screw.

  In addition, as a factory shipment form of the projector ceiling suspension apparatus according to the present invention, it is preferable that the upper unit 512 and the lower unit 514 are assembled. However, before assembling these units 512 and 514, it is also possible to ship as an assembly (so-called kit) of main components. Of course, the upper unit 512 and the lower unit 514 may be shipped in a coupled state. In that case, after separating the projector ceiling suspension device into the upper unit 512 and the lower unit 514, the worker starts installation work according to the procedure.

1 is an overall perspective view of a projector ceiling suspension device 10 according to an embodiment. The figure shown in order to demonstrate the projector ceiling suspension apparatus 10 which concerns on embodiment. The figure shown in order to demonstrate the projector ceiling suspension apparatus 10 which concerns on embodiment. The figure shown in order to demonstrate the upper unit 512 of the projector ceiling-suspending apparatus 10 which concerns on embodiment. The figure shown in order to demonstrate the lower unit 514 of the projector ceiling suspension apparatus 10 which concerns on embodiment. The figure shown in order to demonstrate the projector ceiling suspension apparatus 10 which concerns on embodiment. FIG. 3 is a perspective view illustrating a method for adjusting and fixing the projector ceiling suspension device according to the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Ceiling suspension apparatus, 100 ... 1st base plate, 112 ... Main surface of 1st base plate, 120 ... 1st protruding part, 122 ... 1st axial hole, 130 ... Slot for screw, 200 ... 1st intermediate | middle plate, 212 ... main surface of first intermediate plate, 214 ... second raised portion, 216 ... circular concave portion, 222 ... first standing portion, 224 ... first elongated hole, 226 ... second standing portion, 228 ... second elongated hole, 232 ... 1st bearing tab, 234 ... 1st bearing hole, 236 ... 2nd bearing tab, 238 ... 2nd bearing hole, 240 ... 2nd axial hole, 250 ... Locking relief part, 260 ... Saw tooth, 300 ... 2nd middle Plate, 312 ... Main surface of second intermediate plate, 314 ... Recess, 322 ... Third upright part, 324 ... Third long hole, 326 ... Fourth upright part, 328 ... Fourth long hole, 332 ... Third bearing tab 334 ... third bearing hole, 336 ... fourth bearing tab, 33 4th bearing hole, 400 ... 2nd base plate, 412 ... Main surface of 2nd base plate, 414 ... Round hole for screws, 422 ... 5th bearing tab, 424 ... 5th bearing hole, 426 ... 6th bearing tab, 428 ... sixth bearing hole, 512 ... upper unit, 514 ... lower unit, 520 ... first rotating shaft member, 530 ... second rotating shaft member, 540 ... third rotating shaft member, 522, 550 ... lock nut, 532, 542 ... Axle set screw, 552 ... first lock screw, 553 ... first lock screw base, 554 ... second lock screw, 555 ... second lock screw base, 560 ... sleeve, 570 ... lock lever, 572 ... lever shaft hole, 574 ... Operation unit, 576... Contact portion, P.

Claims (7)

A projector ceiling hanger,
A first base plate;
A first intermediate plate that can be rotatably locked with respect to the first base plate using a first rotating shaft member having a first rotating shaft orthogonal to the main surface of the first base plate;
A second rotary shaft member having a second rotary shaft that is orthogonal to the first rotary shaft and parallel to the main surface of the first intermediate plate can be rotatably locked to the first intermediate plate. A second intermediate plate,
A third rotary shaft member having a third rotary shaft that is orthogonal to the second rotary shaft and parallel to the main surface of the second intermediate plate can be rotatably locked to the second intermediate plate. A second base plate,
The first base plate, the first intermediate plate, the second intermediate plate, and the second base plate are stacked in this order using the first rotary shaft member, the second rotary shaft member, and the third rotary shaft member. When assembled,
The direction of the projector can be adjusted to the yaw direction by rotating the first intermediate plate around the first rotation axis,
The orientation of the projector can be adjusted in the pitch direction by rotating the second intermediate plate around the second rotation axis,
A projector ceiling-suspending device, wherein the attitude of the projector can be adjusted in the roll direction by rotating the second base plate about the third rotation axis. The projector ceiling hanger according to claim 1,
A lock lever having an abutting portion and an operating portion that abuts on the first intermediate plate, and capable of swingably engaging with the intermediate plate using the first rotating shaft member;
On the contact surface of the first intermediate plate with the lock lever, there is formed a undulation portion for locking whose undulation amount gradually changes along the swinging direction of the lock lever,
With the relative rotational position of the first base plate and the first intermediate plate adjusted to a desired rotational position, the lock lever is swung so that the contact portion of the lock lever is moved to the first intermediate plate. A projector ceiling suspension device, wherein the relative rotational position of the first base plate and the first intermediate plate can be fixed at a desired rotational position by strongly abutting against the locking undulation portion of . In the projector ceiling hanger according to claim 1 or 2,
The first intermediate plate adjusts the relative rotational positions of the first and second bearing tabs for receiving the second rotary shaft member, and the first intermediate plate and the second intermediate plate. A first standing part and a second standing part used for
The second intermediate plate adjusts the relative rotational positions of the third and fourth bearing tabs for receiving the second rotating shaft member, and the first intermediate plate and the second intermediate plate. A third upright part and a fourth upright part used for
The first upright part and the second upright part are respectively parallel to each other and have a first long hole and a second long axis whose major axis direction forms a first angle with the main surface of the first intermediate plate. A hole is formed,
Each of the third standing part and the fourth standing part is parallel to each other, and a major axis direction forms a second angle different from the first angle with the main surface of the second intermediate plate. 3 long holes and 4 long holes are formed,
A first lock screw is passed through the first long hole and the third long hole, a second lock screw is passed through the second long hole and the fourth long hole, and the first intermediate plate and the second intermediate plate In a state where the relative rotational position of the first and second lock screws is adjusted to a desired rotational position, the first intermediate plate and the second intermediate plate are A projector ceiling suspension device characterized in that the relative rotation position of the projector can be fixed at a desired rotation position. In the projector ceiling hanger according to any one of claims 1 to 3,
A fifth bearing tab and a sixth bearing tab for receiving the third rotating shaft member are formed on the second base plate,
A recess for receiving the third rotating shaft member is formed in the second intermediate plate,
The third rotating shaft member is brought into contact with the concave portion and is pivotally supported by the fifth bearing tab and the sixth bearing tab, so that a relative rotational position between the second intermediate plate and the second base plate is determined. In a state where the rotation position is adjusted to a desired value, the relative rotation position of the second intermediate plate and the base plate is set to a desired value by tightening a shaft fixing screw to at least one end of the third rotation shaft member. A projector ceiling hanger characterized in that it can be fixed at a rotational position. In the projector ceiling hanger according to any one of claims 1 to 4,
The projector ceiling suspension device, wherein the first long hole and the second long hole have a serrated inner surface on the side far from the main surface of the first intermediate plate. In the projector ceiling-suspending device according to claim 5,
The base of the first lock screw and the second lock screw has a polygonal column shape for preventing idling. In the projector ceiling hanger according to any one of claims 1 to 6,
The projector base suspension device, wherein each of the first base plate, the first intermediate plate, the second intermediate plate, and the second base plate is formed by processing one metal plate.

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