JP2005138998A - Lift for storing projector in ceiling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure sufficient lift distance and provide a lift for storing a projector in a ceiling while realizing a reduction in size and weight of the lift by a simple mechanism. <P>SOLUTION: In this lift, one end of a wire W is connected to a movable frame 3 suspending the projector P while connecting two right and left slide rails L1 movable in the vertical direction only to each other through a slider L2 fixed to the lower end of two opposed vertical frames 2 having upper ends connected to each other through a lateral frame 1. The other end of the wire W is connected to a drum 9 rotated by the drive force of an electric motor M installed at the center of the lateral frame 1. The wire W is wound up and down depending on the rotational direction of the drum 9 to lift up or down the projector P to store in the ceiling or position at a projecting position lower than a ceiling surface for projection. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a projector ceiling storage lifting device for storing a projector in a ceiling or allowing the projector to be used by being lowered to a predetermined projection position during use.

  For example, a projector as shown in FIG. 6 has been proposed as the above-described projector ceiling storage lifting device. This is because two movable sliders L4 and L4 are fixed to the left and right ends at the upper part of the elevating frame 22 for suspending the projector, and the horizontal supports 20 are kept parallel to the left and right vertical supports 21 and 21, respectively. It is configured to receive guidance by the two fixed rails L3 and L3 that are attached, and the electric motor M2 attached to the horizontal support 20 lifts and lowers the wire W2 that suspends the lifting frame 22 by rolling it up and down. Perform the action. The top plate T for closing the opening K2 of the ceiling H2 when the projector is housed is made of a material such as a coated steel plate.

  In order to obtain a smooth ascending / descending operation with the above-described configuration, the distance between the two fixed rails L3 and L3 in the entire range in which the two movable sliders L4 and L4 move up and down that are determined by the movable frame 22 is increased. Since parallelism is required, the vertical supports 21 and 21 and the horizontal support 20 that hold the fixed rails L3 and L3, and the movable frame 22 need high rigidity and high processing accuracy. The time required increased the weight of the device and the cost of implementation.

  Further, since the elevation distance of the projector can be obtained only by the length of the fixed rail L3, it is necessary to increase the length of the vertical support 21 in order to secure a sufficient elevation distance, and the enlargement of the apparatus can be avoided. Therefore, there was always room for improvement because the difficulty of installing heavy objects in the ceiling was always attached.

  The top plate T that closes the opening K2 of the ceiling H2 during storage without using the projector is made of a material different from the finishing material of the ceiling H2, so that it is visually uncomfortable for those who enter the room where the apparatus is installed. In some cases, it was undesirable for the indoor landscape.

  According to the present invention, there is provided a projector ceiling storage elevating device that solves the above-described problems, is small and lightweight, and can be easily mounted so as to obtain a sufficient elevating distance.

  In order to solve the above-described problems, the projector ceiling storage lifting device according to the present invention can move only in the vertical direction by a slider fixed to the lower ends of two opposing vertical frames connected by a horizontal frame at the upper end. One end of one wire is connected to the movable frame that suspends the projector while connecting the two slide rails on the left and right, and the other end of the wire is connected to the drum that rotates by the driving force of the electric motor installed in the center of the horizontal frame. The wire is wound up and down depending on the direction of rotation of the electric motor, and the projector is stored in the ceiling or freely raised and lowered to the projection position lowered from the ceiling surface for projection.

  Since the drum is directly attached to the drive shaft of the electric motor and driven, the loss of the drive force is reduced as compared with the case where a configuration having a drive force transmission mechanism is employed. As a result, less output is required for the electric motor, and a small electric motor can be used, which contributes to weight reduction.

  Since the horizontal frame is in a position different from the vertical frame in the horizontal direction, it does not interfere with the movement of the slide rail, so that a slide rail longer than the height of the vertical frame can be used. Therefore, it is possible to take the length of the slide rail up to the restriction imposed by the height in the ceiling without changing the dimensions of the vertical frame even in the case where a larger lifting distance is required.

  Further, a hole through which the slide rail can pass to the horizontal frame without arranging the horizontal frame at a position different from the vertical frame in the horizontal direction may be provided.

  Since the vertical frame only needs to support the slider, it can be a shorter member than the conventional configuration that had to support the slide rail, and obtaining the parallelism of the left and right sliders in the conventional configuration Since it is easier than obtaining the parallelism between the fixed rails, it is possible to reduce the weight because a vertical frame with less rigidity is sufficient.

  In addition, the left and right slide rails that are guided by the slider and move up and down need only be sufficiently parallel at the connecting portion of the movable frame, and in the portion that passes the slider, the natural escape caused by the elastic deformation of the slide rail is sufficient. Since it is effective, it is possible to obtain a smoother lifting and lowering operation without ensuring strict parallelism over the entire length between the slide rails as in the conventional apparatus configuration.

  Therefore, since the loss of driving force due to friction is small, the driving force required for the lifting operation is reduced, so that it is possible to use a smaller and smaller output motor for the above-mentioned electric motor. In addition to the above, there is an effect of reducing noise during the lifting operation.

  The ceiling of the building is cut off at the time of opening construction by providing an inner frame that is supported by a hanging bracket fixed to the lower end of the slide rail and is located on the lower surface of the projector suspended from the movable frame and forms a ceiling surface when stored. It is possible to obtain an effect of maintaining the indoor aesthetics during storage by fitting and holding the ceiling surface finishing material.

  As a result of the above-mentioned weight reduction, when installing the device in the ceiling above the opening, the left and right vertical frames are fixed to the frame fixing brackets sandwiched from the left and right sides, respectively, and a support member is provided under each frame fixing bracket. In a state in which the load can be dispersed by arranging the support members, the support members can be passed over a plurality of pieces of the field pad receiving material constituting the ceiling of the building or similar existing ceiling structural members, and fixed with a stopper. It will be possible to perform the installation method. Moreover, since it is lightweight, the burden with respect to the labor of installation work reduces, and the advantage that installation time is shortened arises.

  As described above, according to the present invention, there is an effect that it is possible to provide an inexpensive projector ceiling storage elevating device that is small and light and that can obtain a sufficient elevating distance.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Hereinafter, the projector ceiling storage device that raises and lowers the projector P is referred to as a lifting device.

  The lifting device includes a fixed portion 17 fixed in the ceiling, a movable portion 19 that lifts and lowers the projector P, and a wire-type drive mechanism 18 that moves the movable portion 19 up and down. 19 is installed in the ceiling H of the building provided with an opening K for ascending and descending.

  The ceiling H of the building where the elevating device is laid is fixed, for example, to a plurality of field covering materials N arranged at intervals with a ceiling finishing material 13 forming a ceiling surface. However, the present invention is not limited to this, and there is no problem if there is no problem with the laying of the lifting device described later. .

  1 is a horizontal frame and 2 is a vertical frame, both of which use C-type steel material with perforations for weight reduction, but may be other materials having sufficient rigidity. L2 is a slider and is fixed to the lower end of the vertical frame 2 so that the guiding direction is parallel to the vertical line. The two left and right vertical frames 2 and 2 are connected at a position where the sliders L2 and L2 are opposed to each other and are not overlapped with the horizontal frame 1 in the horizontal direction so that the sliders L2 and L2 face each other. The lengths of the slide rails L1 and L1 that are fixed and guide the movement can be longer than the lengths of the vertical frames 2 and 2, and can have dimensions up to the height in the ceiling. The fixed portion 17 is formed by horizontal frames 1 and 2 and 2, sliders L2 and L2, and limit switches R1 and R2 for detecting the upper and lower end points of the movable portion 19, and the left and right vertical frames 2 and 2 are moved to the left and right respectively. The support members 8 and 8 are fixed to the frame fixing brackets 4 and 4 sandwiched from the side, and the support members 8 and 8 are arranged under the frame fixing brackets 4 and 4 so that the load can be dispersed. It is laid in the ceiling by a simple installation method in which it is passed over a plurality of field roof receiving materials U or similar ceiling constituent members constituting the ceiling H of the building and fixed with a stopper B.

  The drive mechanism 18 has an electric motor M as a driving force source mounted on the upper side of the horizontal frame 1 of the fixed portion 17 so that the drive shaft is orthogonal to the horizontal frame 1 in a horizontal plane, and to the drive shaft of the electric motor M. The drum 9 is mounted so as to be directly coaxial, and is composed of a drum 9 rotated by a driving force, and a wire W having one end connected to the drum 9 and wound up and wound in the rotating direction of the drum 9, and the other end of the wire W is a driving mechanism. A movable part 19 located below 18 is suspended. Since the driving force of the electric motor M is directly transmitted to the drum 9 without passing through another transmission mechanism, there is no loss of driving force due to the transmission mechanism, and a smaller and lower output electric motor can be used, which contributes to weight reduction.

  The movable part 19 includes a movable frame 3 and two slide rails L1 and L1, a suspension support 6 and a liner 7, an inner frame hanging bracket 5, a ceiling finishing material 13 generated when an opening K is provided in the ceiling H, and an opening inner frame. 11, a base plate 10, an ascending end limit dog 15, and a descending end limit dog 16. The lower end of the wire W of the driving mechanism 18 is suspended by being connected to the center of the upper surface of the movable frame 3. Therefore, by controlling the rotation of the electric motor M, it can be freely raised and lowered or stopped. The ascending end limit dog 15 and the descending end limit dog 16 are attached to the slide rail L1, and move up and down as the movable part 19 moves to contact the limit switches R1 and R2 provided on the fixed part 17 so that the upper and lower end points are set. The movable part 19 is stopped by detecting. In addition, the left and right slide rails L1 and L1, which are connected by the movable frame 3 and are kept parallel to the vertical direction, are guided by the sliders L2 and L2 in the fixed portion, so that the direction of movement of the movable portion when moving up and down is vertical. Limited. At this time, the left and right slide rails L1 and L1 which are guided by the sliders L2 and L2 and move up and down need only be sufficiently parallel at the connecting portion by the movable frame 3, and in the portion passing through the sliders L2 and L2, Since there is a natural relief effect caused by elastic deformation of the slide rails L1 and L1, it is possible to obtain a smoother lifting operation without securing strict parallelism over the entire length between the slide rails as in the conventional device configuration. it can. Therefore, it is possible to reduce the loss of driving force due to friction in the guide mechanism and reduce the driving force required for the driving mechanism 18. Further, the slide rails L1 and L1 have an action of keeping stillness by suppressing a swing due to a disturbance during projection in which the movable portion 19 shown in FIG. In addition, the slide rails L1 and L1 are positioned on the lower surface of the projector P suspended by the suspension support 6 and the spacer 7 fixed below the movable frame 3, and the opening K is closed during storage to form a ceiling surface. Opening inner frame 11 supported by inner frame hanging metal fittings 5 and 5 fixed to the respective lower end portions of each of the above is provided, and ceiling finishing material 13 when ceiling H of the building is cut off at the time of opening construction is fastened to base plate 10. The effect of maintaining the indoor aesthetics at the time of storage can be obtained by fitting and holding the upper portion and fixing the opening outer frame 12 to the opening K side to cover the cut surface generated on the ceiling H.

  For the reasons described above, it is possible to provide an elevating device that can be reduced in weight while maintaining the elevating distance, can be easily installed in the ceiling, and can improve the indoor landscape during storage.

Elevator front view showing the projector stored in the ceiling Elevator front view showing the state of projection using a projector Top view of lifting device Perspective view of main part showing positional relationship between slide rail and slider Plan view showing a conventional lifting device Front view showing a conventional lifting device

Explanation of symbols

1 horizontal frame 2 vertical frame 3 movable frame 4 frame fixing bracket 5 inner frame suspension bracket 6 suspension support 7 liner 8 support member 9 drum 10 base plate 11 opening inner frame 12 opening outer frame 13 ceiling finishing material 14 limit switch bracket 15 Ascending end limit dog 16 Descending end limit dog 20 Horizontal support 21 Vertical support 22 Lifting frame B Stopper H, H2 Ceiling K, K2 opening L1 Slide rail L2 Slider L3 Fixed rail L4 Movable slider M Electric motor N Material P Projector R1, R2 Limit switch T Top plate U field edge receiving material W wire

Claims (4)

  One wire on the movable frame that suspends the projector while connecting the two slide rails that can move only in the vertical direction by the slider fixed to the lower ends of two opposing vertical frames that are connected at the top by a horizontal frame Connect the other end of the wire, connect the other end of the wire to the drum that rotates by the driving force of the electric motor installed in the center of the horizontal frame, wind up and down the wire according to the rotation direction of the electric motor, and store the projector in the ceiling Elevator for storing in projector ceiling that can be freely raised and lowered to a projection position lowered from the ceiling surface for projection.   2. A lifting device for storing in a projector ceiling according to claim 1, wherein the height of the slide rail and the wire can be changed without changing the height of the vertical frame to obtain a lifting amount equal to or higher than the height of the vertical frame. .   An opening provided on the ceiling surface for lowering the projector from the ceiling surface, which is located on the lower surface of the projector suspended by the movable frame and forms the ceiling surface when stored, and is suspended from the lower end of the slide rail. The projector according to claim 1, wherein the projector has a structure in which the interior aesthetics at the time of storage are maintained by holding the ceiling surface finishing material when the ceiling of the building is cut off at the time of opening construction by holding the interior frame. Lifting device for storage in the ceiling.   3. The structure according to claim 1, wherein the supporting member that holds the vertical posture of the vertical frame is passed over a plurality of field tabs constituting the ceiling and fixed with a stopper. 4. A lifting device for storing in a projector ceiling according to 3.

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