JP5801785B2 - Blackboard equipment - Google Patents

Description

  The present invention relates to a blackboard device in which a video projector is installed on a blackboard such as a whiteboard.

As a conventional blackboard device of this type, for example, there is one described in Patent Document 1 filed by the same applicant as the present application. The blackboard device of this patent document 1 is installed on a normal blackboard such as a whiteboard so that the electronic blackboard can be slid in the longitudinal direction of the blackboard, and a video projector for projecting on the surface of the electronic blackboard is integrally installed on the electronic blackboard. The electronic blackboard and the video projector can be moved together.

JP 2009-119663 A

  In the blackboard device described in Patent Document 1, it is necessary to install an electronic blackboard on the blackboard in order to install a video projector for projecting onto the blackboard surface on a blackboard such as a whiteboard, but the electronic blackboard is expensive. Therefore, there is a drawback that the cost of the blackboard device is high.

  In view of the above circumstances, the present invention provides a blackboard device in which a video projector can be installed on a blackboard without installing an electronic blackboard on a blackboard such as a whiteboard, and the video projector can be moved in the longitudinal direction of the blackboard. For the purpose.

Means for solving the above-described problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 relates to the upper frame 13 attached to the upper end of the blackboard 1 such as a whiteboard . A guide rail 5 made of a lip-shaped channel steel is attached to one end of the blackboard in the thickness direction on the upper surface over its entire length in the longitudinal direction. The mounting column frame 6 is supported in the longitudinal direction of the blackboard by being supported by a guide roller 11 that rolls in the rail 5 and a guide roller 14 that rolls on the upper surface of the upper frame 13 on the other end side in the thickness direction of the blackboard. A video projector 7 for projecting onto the blackboard surface 3a is attached to the upper end of the mounting support frame 6 via an arm 8 that extends horizontally forward of the blackboard 1. To do.

According to a second aspect of the present invention, in the blackboard device according to the first aspect , the arm 8 of the mounting support frame 6 can be expanded and contracted.

According to a third aspect of the present invention, in the blackboard device according to the first or second aspect , the whiteboard blackboard has a matte treatment on the blackboard surface 3a of the whiteboard.

The effect of the invention by the above solution will be described with reference numerals in the embodiments described later. According to the blackboard device of the invention according to claim 1, the guide rail 5 extending in the longitudinal direction of the blackboard at the upper end of the blackboard 1 the provided, video projectors 7 without the guide rails 5 is guided to be rather'll be attached to a video projector 7 to the mounting strut frame 6 for moving the board longitudinally, installing the electronic blackboard on the board as in the conventional I slave The video projector 7 can be moved in the longitudinal direction of the blackboard 1 and projected onto the blackboard surface 3a at an arbitrary position. Since the video projector 7 is attached to the blackboard and moves directly in the longitudinal direction, even if it is an elevating blackboard, if the focal length is adjusted first, the video projector 7 can be stopped at an arbitrary position and the distance at the stop position. The image can be projected on the blackboard surface 3a without matching.

Further , according to the blackboard device of the present invention , the guide trochanter 11 that rolls in the guide rail 5 provided on one end side of the blackboard thickness direction on the upper surface of the upper frame 13 attached to the upper end of the blackboard 1 ; The upper column 13 is supported by a guide trochanter 14 that rolls on the upper surface on the other end side in the thickness direction of the blackboard, and the mounting support frame 6 is provided so as to be movable in the longitudinal direction of the blackboard. The guide roller 11 on one end of the upper surface is controlled not only in the left-right direction but also in the up-down direction by the guide rail 5 made of lip-shaped channel steel with the opening groove facing upward, and rolls in the guide rail 5. Therefore, the video project 7 attached via the attachment column frame 6 and the arm 8 can be smoothly moved in the longitudinal direction of the blackboard 1 while ensuring a stable state.
Furthermore, the mounting strut frame 6 includes a guide rotor 11 which is fitted slidably in the guide rails 5 provided on the upper surface 13 by utilizing the upper frame 13 of the board 1, directly to the upper surface of the upper frame 13 Since the rolling guide roller 14 is provided on the lower end side, and has an arm 8 that extends horizontally from the upper end portion to the front of the blackboard 1 and to which the video projector 7 is attached, the structure is simple. Yes, making it easy.

  According to the blackboard device of the invention according to claim 2, since the arm 8 of the mounting support frame 6 can be expanded and contracted, the focus of the video projector 7 can be easily largely adjusted by expanding and contracting the arm 8. it can.

  According to the blackboard device of the invention of claim 3, when the blackboard is a whiteboard, the blackboard surface of the whiteboard is subjected to a matte treatment, so that no light is reflected and halation is suppressed in the projector image. It can be projected and the image becomes clear and easy to see.

(a) is a top view which shows the raising / lowering type blackboard of the blackboard apparatus based on this invention, (b) is the front view, (c) is a side view. It is the XX line expanded sectional view of (a) of FIG. It is a front view which shows the raising / lowering drive means for raising / lowering driving a blackboard.

To explain on the basis of a preferred embodiment in the drawings of the present invention below, in Figure 1 shows the elevating blackboard 1 blackboard apparatus according to the present invention, the blackboard 1 is known elevation drive, as shown in FIG. 3 by means 4, which is to be raised and lowered between a raised limit position and a lowered limit position indicated by the phantom line in FIG. 1 (b) and (c).

  A blackboard 1 shown in FIG. 1 is a white board in which a surface plate 3 made of, for example, a coated steel plate is bonded to a substrate 2 made of a veneer plate, as shown in FIG. The matte treatment, that is, the matte treatment is performed. Aluminum edge frames 4 are attached to the upper and lower edges and the left and right edges of the blackboard 1. The surface plate 3 is made of an enamel steel plate, and the surface of the steel plate is hard enameled. This enameled blackboard 1 is originally a marker board that is easy to write with a marker, but the blackboard surface 3a is matte (matte) treated so that no light is reflected and the projector image This is a blackboard with an excellent screen board function that can display images with reduced halation.

  The matte treatment includes mechanical or chemical rough surface treatment, matte film coating treatment, and the like. In the blackboard 1, mechanical rough surface treatment and matte film coating treatment are preferable. As the mechanical rough surface treatment, a method of polishing the blackboard surface with, for example, an abrasive can be employed. Further, the matte film coating treatment is a method in which a coating made of an inorganic filler is applied to the blackboard surface, and an extremely good matte surface can be formed. As another matte treatment, there is a method of sticking a matte film to the blackboard surface.

  A guide rail 5 is attached to the upper end of the elevating blackboard as shown in FIGS. 1A to 1C and FIG. A short focus video projector 7 is attached to an attachment column frame 6 that is movable in the longitudinal direction of the blackboard 1. The guide rail 5 is made of lip groove steel, and is attached to one side of the upper surface of the upper frame 13 attached to the upper end of the blackboard 1 with the opening groove facing upward.

  As shown in FIG. 2, the mounting support frame 6 has an arm 8 that extends horizontally from the upper end to the front of the blackboard 1, and a base frame 10 having a generally U-shaped frame is attached to the lower end. A pair of guide rollers 11 slidably fitted to the guide rail 5 are attached to one end of the guide rail 5 in pairs in the longitudinal direction of the guide rail 5 via attachment members 12 respectively. One or more guide rollers 14 that roll on the upper surface of the upper frame 13 are attached to the other end portion via an attachment member 15.

  Therefore, if the mounting column frame 6 is pushed by hand in the left-right direction, the mounting column frame 6 is accurately guided by the plurality of guide rollers 11 fitted to the guide rails 5 while rolling the upper surface of the upper frame 13. While being supported by one or a plurality of moving guide rollers 14 to ensure a stable state, it moves in the longitudinal direction of the blackboard 1, and the video projector 7 is moved in the longitudinal direction of the blackboard 1 as the mounting support frame 6 moves. The image from the video projector 7 can be projected on the blackboard surface 3a at the moved arbitrary position.

  As shown in FIG. 2, the arm 8 comprises a fixed arm portion 8a and a movable arm portion 8b fitted to the fixed arm portion 8a so as to be extendable and contractable. The projector 7 is attached, and a fixing screw 16 for fixing the movable arm portion 8b to the fixed arm portion 8a at a required expansion / contraction position is provided at a required portion of the fixed arm portion 8a.

Here, an example of the raising / lowering drive means 4 for raising and lowering the blackboard 1 will be described with reference to FIG. 3. The fixed frame 20 fixed to the building wall surface (not shown) has a rotating shaft 23 orthogonal to the surface of the blackboard 1. In addition, the disk-shaped first drum 24, the cam-shaped second drum 25, and the brake drum 26 are integrally and sequentially shifted in the axial direction and are attached to the shaft 23 in parallel. The pair of first ropes 27 and 28, each of which is pivotably supported with respect to the fixed frame 20 and has one end fixed to a point-symmetrical position on the outer peripheral surface of the first drum 24, It extends downward via guide pulleys 29 and 30 provided in the vicinity of each portion, and the respective leading end portions 27a and 28a are connected to a lower frame 36 of a lifting frame 33 to which the blackboard 1 is integrally attached. Therefore, if the first drum 24 rotates counterclockwise as shown by the arrow in FIG. 4, the pair of first ropes 27 and 28 are pulled out downward, and the blackboard 1 attached to the lifting frame 33 is It descends by its own weight.

On the other hand, the second rope 38 having one end fixed to the cam-like second drum 25 by being reversely wound around the pair of first ropes 27 and 28 is connected to the balance spring mechanism 43. That is, through the upper right of the guide pulley 40 in FIG. 3, the other end is connected to the spring mounting plate 41. A plurality of (in the drawing, three) balance springs 43a to 43c are mounted in parallel between the spring mounting plate 41 connected to the second cord 38 and the other spring mounting plate 42 facing the spring mounting plate 41. It has been. One end portion of the frame body cord 44 is fixed to the other spring mounting plate 42, and the other end portion of the cord body 44 is connected to the lower end portion of the fixed frame body 20 via the guide pulley 45. The

  Thus, the rotational torque of the cam-shaped second drum 25 due to the biasing force of the balance springs 43a to 43c, which is sequentially increased by the disk-shaped first drum 24 that rotates as the blackboard 1 is lowered, is a circle due to the weight of the blackboard 1. The cam surface of the cam-like second drum 25 is formed so as to be successively smaller in the radial direction so as to always coincide with the rotational torque of the plate-like first drum 24, and thus the balance spring 43 a. The suspension is suspended by the urging force of 43c to obtain a mechanical equilibrium and can be stopped at any position up and down, and is regulated by the brake drum 26 at the stop position, and the stop state is maintained. ing.

  That is, a total of a plurality of, in the drawing, three balance springs 43a to 43c attached to the spring attachment plate 41 on the second cable body 38 side and the spring attachment plate 42 on the frame body cable body 44 side, respectively. The biasing force is adjusted to a biasing force that obtains a mechanical balance with the weight of the blackboard 1. A brake band 46 is attached to the outer periphery of the brake drum 26, and a brake spring 47 and a brake release lever 48 are attached to one end thereof. The brake release lever 48 is fixed to a push-pull operating string 49 at one end thereof. The other end of the operating string 49 is connected to a brake release lever 50 attached along the lower end of the blackboard 1.

  Accordingly, the rotation of the disc-shaped first drum 24 is restricted by the frictional force of the brake band 46 caused by the urging force of the brake spring 47 to restrict the vertical movement of the blackboard 1 and the release operation of the brake release lever 50 is always performed. The brake release lever 48 transmitted via the operating string 49 loosely moves the brake band 46 around the shaft 71 in a direction against the urging force of the brake spring 47, thereby releasing the brake and releasing the disc-shaped first member. The blackboard 1 interlocking with the rotation of the drum 24 is guided by elevating guide columns 34 and 34 that pass through the guide holes 51 and 51 of the fixed frame 20 while maintaining the mechanical balance by the balance springs 43a to 43c. Lightly move up and down.

  The video projector 7 installed on the blackboard 1 that can be driven up and down by the up-and-down driving means 4 as described above moves from the position indicated by the solid line in FIG. You can go up and down. Further, the video projector 7 can be moved to the required position in the length direction of the blackboard 1 by pushing the mounting column frame 6 in the left-right direction at the raised position, and the blackboard surface 3a at the moved arbitrary position. Can be projected.

  In this case, since the surface 3a of the blackboard 1 has been subjected to matte processing (matte processing) as described above, light is not reflected and the image from the video projector 7 can be projected with reduced halation. , The image is clear and very easy to see.

  In addition, since the arm 8 of the attachment column frame 6 to which the video projector 7 is attached can be expanded and contracted, the focus of the video projector 7 can be largely adjusted easily by expanding and contracting the arm 8.

  In the above embodiment, the planar blackboard having a straight line in plan view has been described. However, the present invention can also be applied to a curved blackboard or a semi-curved blackboard having a curved plan view. That is, in the case of a curved blackboard or a semi-curved blackboard, a linear guide rail 5 may be attached to the upper end side of the curved or semi-curved blackboard. For example, if the entire blackboard is curved, What is necessary is just to fix in the state which mounted the both ends of the linear guide rail 5 of the length substantially the same as the both ends of the upper end surface of a curved blackboard.

  In the above embodiment, the blackboard 1 is made of a whiteboard. However, the blackboard 1 is not limited to a whiteboard, and is a blackboard that can be written and erased with chalk. By using a simple blackboard, classes or presentations using both video and chalk can be performed.

DESCRIPTION OF SYMBOLS 1 Blackboard 3 Blackboard surface board 3a Blackboard surface 5 Guide rail 6 Mounting support frame 7 Video projector 8 Mounting support frame arm

Claims (3)

A guide rail made of lip-shaped channel steel is attached to one end of the blackboard in the thickness direction on the upper surface of the upper frame attached to the upper end of a blackboard such as a whiteboard , with its opening groove facing upward over its entire length And is supported by a guide roller that slidably fits on the guide rail and rolls in the guide rail, and a guide roller that rolls on the upper surface of the upper frame on the other end side in the thickness direction of the blackboard. The mounting column frame is provided so as to be movable in the longitudinal direction of the blackboard, and a video projector for projecting onto the blackboard surface is attached to the upper end of the mounting column frame via an arm that extends horizontally to the front of the blackboard. Blackboard equipment that becomes.   The blackboard device according to claim 1, wherein the arm of the mounting support frame can be extended and contracted.   The blackboard device according to claim 1 or 2, wherein the whiteboard blackboard has a matte treatment on the blackboard surface of the whiteboard.

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