JP6899508B2 - Floor drop device and floor drop method - Google Patents

Description

An embodiment of the present invention relates to a floor drop device and a floor drop method for danger experience education.

In recent years, in order to prevent occupational accidents, education has been implemented to make workers experience danger and raise the sensitivity of accident prevention.

In general, danger experience education is a method of reproducing equipment and environment close to an actual disaster, taking safety measures, and then experiencing danger, but the experience equipment becomes large-scale and safety measures are taken. Even so, there is a risk of being damaged. For this reason, a danger experience education system using virtual reality (hereinafter referred to as "VR") technology is being introduced.

The conventional danger experience education system using VR technology uses a head-mounted display to show the subject 3D images to stimulate the eyesight, and the sound from the headphones stimulates the subject's hearing. By dropping the floor with a drop device and stimulating the subject's tactile sense at the same time, the reality effect is further improved.

In the conventional floor drop device, a sliding support member is arranged on the base, and a tread plate is arranged on the support member. In the case of this floor drop device, the support member is pulled laterally to drop the tread while the subject is on the tread. After that, when the subject disappears from the top of the tread and the load on the tread disappears, the tread is automatically returned to the position before the fall (original position) by the repulsive force of the spring provided under the tread (patented). Reference 1).

In the case of a conventional floor drop device having such a structure, a linear guide is required to pull the support member in one direction, and a return spring is also required for automatic return. Furthermore, since the subject rides on the tread and pulls the support member while a load is applied, it is necessary to attach a wheel between the support member and the tread to reduce friction.

Japanese Unexamined Patent Publication No. 2016-218323

As described above, in the conventional case, since two mechanisms of dropping and returning are provided, many parts are required, and a large space is required as the mechanism becomes large. For this reason, it is often operated at a permanent VR experience event in a large installation space.

An object to be solved by the present invention is to provide a floor drop device and a floor drop method which can be easily moved and installed to an event venue, a conference room, or the like as a whole VR experience system because the installation space is small.

The floor drop device of the embodiment includes a tread plate, a cam mechanism, and a support mechanism. The treads are placed at the first height position. The cam mechanism supports the tread plate by abutting the contour portion on the bottom portion of the tread plate, and rotationally drives a cam provided with a non-contact portion that does not abut on the bottom portion on a part of the contour portion. The support mechanism supports the tread at a second height position lower than the first height position.

In the floor dropping method of the embodiment, the contour portion of the cam provided with a non-contact portion that does not contact the bottom portion is brought into contact with the bottom portion of the tread plate arranged at the first height position. The tread plate is supported by the tread plate, the cam is rotationally driven, and the non-contact portion is directed to the position where the tread plate is supported, so that the tread plate is dropped and the tread plate is arranged at a position lower than the first height position. Support.

It is a figure which shows the structure of the VR experience system of one Embodiment. It is an enlarged view which shows the boarding unit of a VR experience system. It is a figure which shows the shape of the cam of the floor drop device of a VR experience system. It is a perspective view which shows the rotation position detection mechanism of a cam. It is a figure which shows the floor drop operation of a floor drop device. It is a figure which shows the floor return operation of a floor drop device.

Hereinafter, embodiments will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a VR experience system of one embodiment.
As shown in FIG. 1, this VR experience system includes a VR playback device 10, a head-mounted display 20 (hereinafter referred to as “HMD20”), a helmet 21, a control box 30 as a control unit, an operation unit 31, and a floor drop device 40. And so on.

The VR playback device 10 is, for example, a computer or the like, and reproduces and outputs a VR moving image (3D video, stereo sound, etc.).

The HMD 20 includes a goggle-shaped display 22, headphones 23, and the like. The display 22 and the headphones 23 are integrally provided so that the mounting position can be adjusted. The helmet 21 covers and protects the subject's head. The helmet 21 may not be provided.

The display 22 and the headphones 23 are connected to the VR playback device 10 via their respective cables. The display 22 displays a 3D image input from the VR playback device 10. An image from the viewpoint of the subject is projected in the 3D image, and the image is controlled to move from the viewpoint of the subject according to the movement of the subject. The headphones 23 utter (output) stereo sound, 3D sound, or the like input from the VR playback device 10.

In addition, the HMD 20 is provided with a motion sensor, a line-of-sight sensor, and the like. The motion sensor detects the vertical and horizontal movements of the HMD 20 (subject's head), and the line-of-sight sensor detects the subject's line of sight. The video (for example, the video on the right side when facing right) and the sound output from the VR playback device 10 are output to the display 22 and the headphones 23 according to the movement of the unit and the line of sight.

The control box 30 is provided with a USB terminal (not shown), a coaxial terminal (not shown), and the like. The control box 30 is connected to the cam mechanism (pulse motor units 51, 61) of the floor drop device 40 and the mat sensor 55 via a coaxial cable (communication cable) connected to the coaxial terminal.
Further, the control box 30 is connected to an external device such as the VR playback device 10 or the operation unit 31 via a USB cable connected to the USB terminal. That is, the USB terminal is a communication interface that receives a signal that triggers a fall from an external device. The control box 30 controls the floor drop device 40 based on a timing signal synchronized with the 3D image of the VR playback device 10.

The control box 30 operates the cam mechanism (first cam mechanism and second cam mechanism) of the floor drop device 40 based on the timing signal output from the VR reproduction device 10 in accordance with the fall timing of the image.

Explaining the movement of the floor fall in detail, the control box 30 turns on the switches of the pulse motor units 51 and 61 when a trigger instructing the fall occurs, and moves the cams 53 and 63 in their respective directions (arrows A and B). Rotating in the direction), the top portions 53a and 63a of the cams 53 and 63 come off the tread plate 54, drop the tread plate 54, and are supported by the support mechanism 56.

Specifically, the control box 30 controls the cam mechanism of the floor drop device 40 when the timing signal from the VR reproduction device 10 is received, and the bottom of the floor plate 54 is the contour portions 59 and 69 (see FIG. 3). The cams 53 and 63 are rotated from the position where the cams 53 and 63 are in contact with the position where the step portion 58 is not in contact with the vehicle (see FIG. In this case, the reception of the timing signal from the VR reproduction device 10 is the generation of the trigger instructing the fall.

Even after the tread plate 54 has fallen, the cams 53 and 63 are rotated as they are and rotated to a certain angle (for example, 330 ° from the position where the tops 53a and 63a were at the top). , 63a is rotated in the same direction as when the cams 53 and 63 are dropped so that the cams 53 and 63 return to their original positions, and the tread plate 54 supported by the support mechanism 56 is pushed up by the contour portions 59 and 69 to the position of the first height. The rotation of the cams 53 and 63 is stopped at (the position of the floor surface).

The operation unit 31 is a trigger generation unit that generates a drop or return trigger for the control box 30. The operation unit 31 is provided with an LED 32, a drop button 33, a return button 34, and the like. The LED 32 lights up in response to the power signal from the control box 30 to notify that the floor drop device 40 and the control box 30 are in operation, that is, the power is on.

The drop button 33 is a button that instructs the tread plate 54 to fall. By pressing the fall button 33, the control box 30 detects that a trigger instructing the fall has occurred. By operating the drop button 33, the tread plate 54 can be dropped at an arbitrary timing.

The return button 34 is a button for returning the position of the dropped tread 54 to the original position, that is, instructing the return, and by operating the return button 34, each cam mechanism is operated at an arbitrary timing, and the dropped tread It is possible to return the 54 to its original height.

At the time of the floor falling experience, after the tread plate 54 fell, the cams 53 and 63 were rotated as they were and controlled so that the tread plate 54 automatically returned to the original position. However, after the tread plate 54 fell, the cams 53 and 63 were controlled. The rotation of the cam 53 and 63 may be temporarily stopped, and then the rotation of the cams 53 and 63 may be restarted by operating the return button 34 of the operation unit 31 to return the tread plate 54 to its original position.

Explaining the return movement in detail, when the control box 30 detects that a trigger instructing the return has occurred, the control box 30 turns on the switches of the pulse motor units 51 and 61 that rotate the cams 53 and 63 of each cam mechanism. , The rotary shafts 52 and 62 are rotated in the respective directions of arrows A and B (see FIG. 6), and when the tops 53a and 63a of the cams 53 and 63 reach the highest point, the switch is turned off and the pulse motor section 51 is turned off. , 61 to stop the rotation. The timing at which the tops 53a and 63a of the cams 53 and 63 reach the highest point is detected by the photo sensor 72 (see FIG. 4).

The floor drop device 40 includes a boarding unit 41, a floor lock 42, casters 43, a frame portion 47 in which a vertical frame 45 and a horizontal frame 46 are fixed as a frame by an L-shaped metal fitting 44, a hook member 48 provided on the frame portion 47, and a hook member 48. A handrail portion 50 including an opening / closing bar 49 and the like is provided.

The floor lock 42 is a support member provided at the bottom edge of the boarding unit 41, and supports the boarding unit 41 by interposing between the floor surface and the boarding unit 41. The floor lock 42 has a function of preventing rattling of the entire device and fixing the position. The caster 43 is a wheel provided on the bottom edge of the boarding unit 41, and can be easily moved by lifting the floor lock 42 side of the boarding unit 41 and using it when moving the boarding unit 41.

As shown in FIG. 2, the boarding unit 41 is a housing having an opening 41a at the top, and has a first cam mechanism including a pulse motor unit 51, a rotating shaft 52, and a cam 53 inside, and a pulse motor unit 61. A second cam mechanism including a rotating shaft 62 and a cam 63, a tread plate 54 supported by two front and rear cam mechanisms (first cam mechanism and second cam mechanism), and a mat arranged on the tread plate 54. It has a sensor 55 and a support mechanism 56 that supports the tread plate 54 that has fallen off due to the rotation of the cams 53 and 63 at a height (position at a second height) that does not hit the cams 53 and 63.

The tread 54 and the mat sensor 55 are arranged in the opening 41a so as to form a part of the floor surface above the boarding unit 41. The height of the floor surface is set as the position of the first height.

The cam 53 of the first cam mechanism and the cam 63 of the second cam mechanism are arranged so as to face each other. The cams 53 and 63 support the tread plate 54 by bringing the contour portions 59 and 69 (see FIG. 3) into contact with the bottom of the tread plate 54. The cams 53 and 63 are provided with stepped portions 58 and 68 which are non-contact portions that do not abut on the bottom of the tread plate 54 on a part of the contour portions 59 and 69.

The first cam mechanism is provided below one side edge (front edge) of the opening 41a, and the second cam mechanism is provided below the other side edge (rear edge). The first cam mechanism drives the pulse motor unit 51 to rotate the rotary shaft 52 and drive the cam 53 to rotate. The cam 53 is rotated in the direction of arrow A (counterclockwise toward the drawing). The second cam mechanism drives the pulse motor unit 61 to rotate the rotary shaft 62 to rotationally drive the cam 63. The cam 63 is rotated in the direction of arrow B (clockwise toward the drawing).

In this cam mechanism, when two cams 53 and 63 facing each other are rotated at the same time and the stepped portions 58 and 68 move to the positions of the end portions of the tread plate 54, the support of the bottom portion of the tread plate 54 by the cams 53 and 63 is released. The tread plate 54 falls.

The mat sensor 55 is connected to the VR reproduction device 10 via the control box 30, detects the pressing force of the subject's foot (stepping or movement of the foot), and detects the pressing pressure of the foot (stepping or movement of the foot). ) Is output to the VR reproduction device 10 which is an external device. The VR reproduction device 10 controls the subject image in the 3D image to walk according to the signal received from the mat sensor 55. The same can be done by attaching a motion sensor to the foot of the subject instead of the mat sensor 55.

The support mechanism 56 is arranged below the opening 41a between the first cam mechanism and the second cam mechanism. The support mechanism 56 has a support pillar portion 56a and a cushion portion 56b arranged on the support pillar portion 56a. The support mechanism 56 lowers the tread plate 54 whose bottom is not in contact with the contour portion 59 due to the stepped portion 58 by rotating the cams 53 and 63 below the floor surface (position of the first height). It is supported at a height position (second height position) that does not hit 63. That is, the support mechanism 56 is provided at a height at which the dropped tread plate 54 can be supported without contacting each cam mechanism.

As shown in FIG. 3, the cam 53 of the first cam mechanism has a contour portion 59, and a step portion 58 is provided in a part thereof. The step portion 58 is provided so as to linearly connect the top portion 53a of the cam 53 and the valley portion 53b of the cam 53. The stepped portion 58 does not necessarily have to be provided in a straight line, and may be provided by being recessed so as to enter the inside of the curved surface of the contour portion 59.

The contour portion 59 is formed of a curved surface that surrounds the top portion 53a of the cam 53 and the valley portion 53b of the cam 53 around the rotating shaft 52. The curved surface is provided so that the distance from the center of the rotating shaft 52 changes continuously. The continuous change of the distance means that the distance from the center is continuously shortened between the distance from the top 53a of the cam 53 to the valley 53b. Note that this configuration is the same for the second cam mechanism, and the description thereof will be omitted.

As shown in FIG. 4, the first cam mechanism is provided with a shielding plate 71 supported by the rotating shaft 52 and a photosensor 72 fixed to the boarding unit 41. When the rotating shaft 52 rotates, the shielding plate 71 rotates together with the cam 53.

The photosensor 72 has a light emitting unit that emits light, and a light receiving unit that is provided on the optical axis 73 of the light emitting unit at intervals from the light emitting unit. The shielding plate 71 is arranged so as to pass between the light emitting portion and the light receiving portion when the cam rotates. The photo sensor 72 is provided so that the shielding plate 71 blocks the light on the optical axis 73 according to the rotation position of the shielding plate 71 and detects the rotation position of the cam 53. In this example, the photo sensor 72 is used as a means for detecting the rotation position of the cam 53, but other than this, for example, an encoder, a limit switch, or the like may be used. The configuration of this cam mechanism is the same for the second cam mechanism.

The operation of this VR experience system will be described below.
In the case of this VR experience system, the damaged image output from the VR playback device 10 is displayed on the display 22 of the HMD 20, the sound at that time is output from the headphones 23, and the subject experiences the damage.

The image changes according to the movement of the subject, and when the image of the subject approaches a predetermined position (stepping on the position of the mat sensor 55), the timing signal is output from the VR playback device 10 to the control box 30. Will be done.

The control box 30 that receives the timing signal controls the first cam mechanism and the second cam mechanism, turns on the switches of the pulse motor units 51 and 61, and sets the opposing cams 53 and 63 to the arrows A and B, respectively. By rotating in the direction and directing the step portion 58 to the position of the end portion of the tread plate 54, the top portions 53a and 63a of the cams 53 and 63 are disengaged from the tread plate 54, and the tread plate 54 falls in the direction of arrow C (see FIG. 5). , The subject standing on the tread 54 feels the fall. The dropped tread plate 54 is supported at a height position (second height position) of the support mechanism 56.

The fall distance of the tread 54 is, for example, about 10 mm to 30 mm, but the subject can experience a fall beyond imagination due to the synergistic effect of the 3D image and the sound effect.

Then, when the cams 53 and 63 reach a certain position (see FIG. 5), the detection signal is output from the photo sensor 72 to the control box 30, so that the control box 30 turns off the switches of the pulse motor units 51 and 61. Then, the rotational operation of the rotating shafts 52 and 62 by the pulse motor units 51 and 61 is stopped.

After dropping the tread plate 54, by operating the return button 34 of the operation unit 31, the control box 30 turns on the switches of the pulse motor units 51 and 61 of each cam mechanism, and the rotary shafts 52 and 62 are indicated by arrows A. , B are rotated in each direction (see FIG. 6).

At this time, as the cams 53 and 63 rotate, the contour portions 59 and 69 of the cams 53 and 63 come into contact with the tread plate 54, and then along the bulge (curved surface shape) of the contour portions 59 and 69 of the cams 53 and 63. The tread 54 is lifted in the direction of arrow D (see FIG. 6).

Then, when the tops 53a and 63a of the cams 53 and 63 reach the highest point, the detection signal is output from the photo sensor 72 to the control box 30, so that the control box 30 turns off the switches of the pulse motor units 51 and 61. Then, the driving of the pulse motor units 51 and 61 is stopped. As a result, the rotation of the rotating shafts 52 and 62 stops, and the tread plate 54 lifted by the cams 53 and 63 also stops at that position (the position at the original height in FIG. 2).

As described above, according to the VR experience system of this embodiment, the cam mechanism using the cams 53 and 63 having the stepped portions 58 and 68 on the contour is introduced, and the tread plate 54 has a drop function and a return function to the original position. Since these two functions have been realized, the number of parts is small and miniaturization is possible. Therefore, the installation space is small, and the VR experience system as a whole can be easily moved, and can be moved to an event venue or installed in a conference room or the like.

In addition, the following effects can be obtained in this embodiment.
That is, in this VR experience system, the subject wears the HMD22 and experiences the fall of the floor while watching the VR image, so that the subject feels floating in the situation where he / she crashed in the VR image and the impact force after the fall. And you can experience the collision sound and experience the powerful danger.

In addition, the subject can safely experience a realistic crash without attaching a safety device such as a harness, and the boarding unit 41 can also be installed in a small and lightweight conference room or the like.
Further, a support mechanism 56 is provided between the two cam mechanisms to prevent the dropped tread plate 54 from hitting the cams 53 and 63, so that the drive mechanism including the cams 53 and 63 can be protected.

The vertical frame 45 and the horizontal frame 46 are used as a frame, and these are fixed by L-shaped metal fittings 44 to provide a frame portion 47, and a handrail portion 50 that can be opened and closed is provided in a part thereof so that the subject does not fall down when experiencing danger. It can be supported, and the frames can be separated and carried compactly when moving.

In the above embodiment, two cam mechanisms (first cam mechanism and second cam mechanism) are prepared to support the front edge and the trailing edge of the tread plate 54 arranged in the opening 41a of the boarding unit 41, and the tread plate 54 is provided. However, one edge of the tread 54 may be rotatably supported by the edge of the opening of the boarding unit 41, and a cam mechanism may be provided only on the other edge. In this case, the surface of the tread plate 54 is inclined and falls. Further, in the present embodiment, two cam mechanisms (first cam mechanism and second cam mechanism) are arranged at the front end and the rear end of the tread plate 54, but they are arranged at the left end / right end or four corners (diagonal) of the tread plate 54. You may.

In the above embodiment, the boarding unit 41 and the control box 30 are separately connected by a cable, but the boarding unit 41 may include a control function (control unit) of the control box 30. Although the operation unit 31 is also separated from the control box 30 and connected by a cable, the buttons and LEDs of the operation unit 31 may be attached to the boarding unit 41.

Although embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. This novel embodiment can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

Further, the components of the control box 30 shown in the above embodiment may be realized by a program installed in a storage such as a hard disk device of a computer such as a VR playback device 10, and the above program may be realized by a computer-readable electronic medium. : The function of the present invention may be realized by the computer by storing it in electronic media and causing the computer to read the program from the electronic medium. Examples of the electronic medium include a recording medium such as a CD-ROM, a flash memory, a removable media: a removable media, and the like. Further, it may be realized by distributing and storing the components in different computers connected via a network and communicating each component between the functioning computers.

10 ... VR playback device, 20 ... head mounted display (HMD), 21 ... helmet, 22 ... display, 23 ... headphones, 30 ... control box, 31 ... operation unit, 33 ... drop button, 34 ... return button, 40 ... floor Drop device, 41 ... Boarding unit, 41a ... Opening, 42 ... Floor lock, 43 ... Caster, 44 ... L-shaped metal fittings, 45 ... Vertical frame, 46 ... Horizontal frame, 47 ... Frame part, 48 ... Hook member, 49 ... Open / close bar, 50 ... handrail, 51, 61 ... pulse motor, 52, 62 ... rotating shaft, 53, 63 ... cam, 53a, 63a ... top, 53b, 63b ... valley, 54 ... tread, 55 ... mat sensor , 56 ... Support mechanism, 56a ... Support pillar portion, 56b ... Cushion portion, 58, 68 ... Step portion, 59, 69 ... Contour portion, 71 ... Shielding plate, 72 ... Photosensor, 73 ... Optical axis.

Claims (11)

The treads placed at the first height position and
A cam mechanism that rotationally drives a cam that supports the tread plate by abutting a contour portion on the bottom portion of the tread plate and is provided with a non-contact portion that does not abut on the bottom portion on a part of the contour portion.
A floor drop device including a support mechanism for supporting the tread plate at a position lower than the position of the first height. The floor drop device according to claim 1, further comprising a control unit that controls the cam mechanism by generating a trigger instructing the fall and rotates the cam to a position where the bottom portion of the tread plate is not in contact with the contour portion. The cam is rotated in the same direction as the falling direction by the generation of the trigger instructing the return, the tread plate supported by the support mechanism is pushed up by the contour portion, and the position of the first height (the position of the floor surface). The floor drop device according to claim 1, further comprising a control unit for stopping the rotation of the cam according to (1). The cam mechanism
A first cam mechanism that rotationally drives a first cam that supports one end of the bottom of the tread and is provided with a first non-contact portion that does not abut on the bottom of a part of the contour that contacts the bottom of the tread. ,
A second non-contact portion that supports the other end of the bottom portion of the tread plate and is provided with a second non-contact portion that faces the first non-contact portion and does not abut the bottom portion on a part of the contour portion that is in contact with the bottom portion of the tread plate. The floor drop device according to claim 1, further comprising a second cam mechanism for rotationally driving the two cams. The floor drop device according to claim 2 or 3, further comprising a trigger generation unit that generates the drop or return trigger with respect to the control unit. The control unit
The floor drop device according to claim 2, further comprising a communication interface for receiving a signal that triggers a fall from an external device. The trigger generator
The floor drop device according to claim 5, which is an operation unit including a drop button that triggers a fall. The trigger generator
The floor drop device according to claim 5, which is an operation unit including a return button that triggers a return. The floor-falling device according to claim 6, further comprising a mat sensor that is arranged on the tread plate, detects the movement of the foot of the subject, and outputs a signal indicating the detected foot movement to the external device. The bottom of the tread plate arranged at the first height position is brought into contact with the contour portion of a cam provided with a non-contact portion that does not abut on the bottom portion of a part of the contour portion to support the tread plate.
The cam is rotationally driven, and the non-contact portion is directed to a position that supports the tread plate, so that the tread plate is dropped and the tread plate is arranged at a position lower than the position of the first height. How to drop the floor with a floor drop device to support. The floor by the floor dropping device according to claim 10, wherein the cam is rotationally driven, the tread plate supported by the support mechanism is pushed up by the contour portion of the cam, and the tread plate is returned to the position of the first height. How to fall.

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