JP5809543B2 - Safety experience device for hand-held rotary tools - Google Patents

Description

  The present invention relates to a safety experience device for a hand-held rotary tool, and more particularly to a safety experience device for a hand-held rotary tool having a rotary blade such as a grinder or a rotary saw.

  There are a variety of occupational accident risks at so-called work sites such as factories and construction sites, and their prevention, investigation of the cause of occurrence, and prevention of recurrence have become very important issues. .

  Particularly at construction sites, the frequency of disasters caused by so-called hand-held rotary tools such as grinders and circular saws that are frequently used is high. Specific examples of disasters include the following. First, when trying to change the work posture or work position, there is damage due to the rotating grindstone or blade touching a part of the body. Second, there is damage to the blades and grindstones caused by using non-standard or non-use replacement blades or grindstones for the equipment, and injury due to contact with the blades or grindstones scattered by the breakage. Thirdly, there is a case where the grindstone or blade hits a part of the body due to a so-called kickback phenomenon in which the rotating grindstone or blade hits a workpiece such as a workpiece or a workpiece to be blown away. .

  Of these disaster cases, there is a need for a wide range of workers to know the sense of kickback phenomenon that even experienced workers can experience, and to recognize and understand the dangers. high.

As a technique for recognizing the danger of such work, for example, there is a virtual reality system as disclosed in Non-Patent Document 1. The system disclosed in Non-Patent Document 1 is such that the working state and the operator's hand are displayed as images on the display screen, and the subject manipulates the operator's hand displayed on the screen. Then, when the operator's hand operated by the subject approaches the rotating body or the blade on the screen, an accident such as entrainment or cutting occurs, and an image associated therewith is reproduced.
According to such a system, the subject can visually experience the danger of work without actually being damaged.

  A technique for knowing information about disasters lurking in various operations at a work site is disclosed in Patent Document 1. The technology disclosed in Patent Document 1 is based on the information input to the terminal, creating a database of the causes of work and situations that have been the subject of many occupational accidents that have occurred in the past at construction sites. The corresponding disaster is displayed.

  According to such a system, it is possible to know in advance what kind of points should be taken into consideration for the work actually performed by the worker so that a similar disaster can be avoided.

  Further, Non-Patent Documents 2 and 3 disclose apparatuses for performing training for safely using equipment used at a construction site or a factory.

JP-A-6-44211

"Labor accident simulated experience VR system Safe Master sandwiched and involved disaster catalog", Solid Ray Laboratory "Welding Training Support System Catalog", Lincoln Electric Japan Co., Ltd. "Operation training of general-purpose machine tools using mixed reality" Japan Ergonomics Society Kanto Chapter Conference Lecture Volume: 40th, pages: 120-121, Yosuke Onata, 4 others

According to the said nonpatent literature 1, an occupational accident can be visually felt. Further, according to the system disclosed in Patent Document 1, it is possible to know in advance a high-risk state that causes an occupational accident.
Further, according to the devices disclosed in Non-Patent Documents 2 and 3, it is possible to learn how to handle various devices and tools.

  However, in any system or apparatus, the subject itself is not subject to troubles or shocks that occur in the equipment. For this reason, although we recognize the actual situation of occupational accidents, it is difficult to sense how dangerous it is.

  Therefore, an object of the present invention is to provide a safety sensation apparatus that allows a subject to experience the impact of a so-called kickback phenomenon that may occur when using a hand-held rotary tool.

In order to achieve the above object, a safety sensation device for a hand-held rotary tool according to the present invention is provided at least on a tool body having a handle portion of a hand-held rotary tool and on the tip side of the tool body with the handle portion as a base A rotating blade equivalent portion, a sensing portion for sensing physical displacement when the rotary blade equivalent portion contacts the pseudo workpiece, and the rotary blade at a contact position of the rotary blade equivalent portion and the pseudo workpiece. An actuator for moving the tool main body to the left side in the tangential direction of the corresponding portion; and a control unit for outputting an operation signal for operating the actuator by obtaining a displacement signal output from the sensing unit. To do.

  Further, in the safety sensation device for a hand-held rotary tool having the above-described features, the control unit includes a comparator that determines whether or not the displacement signal has reached a predetermined threshold value, and the displacement signal is The operation signal may be output when the threshold is reached. By setting it as such a structure, an actuator can be operated according to the pressing pressure of the rotary blade equivalent part with respect to a pseudo workpiece.

  In the safety sensation device for a hand-held rotary tool having the above-described features, the actuator is an air cylinder and air supply means for supplying air to the air cylinder, and the air cylinder is provided between the air cylinder and the air supply means. In the non-operating state in which the operation signal is not input, the cylinder chamber or the rod chamber in the air cylinder is opened to the outside, and in the operating state in which the operation signal is input, the air cylinder and the air supply means are not connected. An electromagnetic valve constituting the air supply path can be provided. By setting it as such a structure, moving a tool main body instantaneously is realizable.

  In the above-described configuration, a link mechanism may be provided at a connection portion between the tool main body and the air cylinder. By setting it as such a structure, the freedom degree at the time of moving the tool main body which connected the air cylinder improves.

  In the safety sensation apparatus for a hand-held rotary tool having the above-described features, the actuator includes a wire connected to the tool body and a winding unit that winds the wire in response to an input of the operation signal. It can also be.

  Further, in the configuration as described above, the wire is connected to another rotating shaft attached with an automatic winding mechanism for maintaining a predetermined tension, and the rotating shaft of the winding means and the other rotating shaft are connected to each other. In the meantime, it is preferable to provide an electromagnetic clutch that is operated by the input of the operation signal and transmits the power of the rotating shaft of the winding means to the other rotating shaft. With such a configuration, power transmission between another rotating shaft and the rotating shaft of the winding means can be executed / released.

  In the above configuration, the control unit may include a timer function that determines an output time of the operation signal. By providing such a function, excessive winding of the wire can be prevented.

  In the hand-held rotary tool safety sensation apparatus having the features as described above, a storage means in which a sound corresponding to each operation when using the hand-held rotary tool is recorded, and a sound output for outputting the sound as an audible sound And a sound reproducing unit that selects a sound suitable for the operation of the tool body from the sound stored in the storage means and outputs the sound to the sound output means. By setting it as such a structure, a sound switches according to a test subject's operation | movement (movement of the hand-held rotary tool which a test subject operates), and the realistic feeling of work can be improved.

  Further, in the safety sensation device for a hand-held rotating tool having the above-described features, the detection means for detecting the position and posture of the tool main body, the position of the tool main body detected by at least the detection means, and a predetermined value An image generation unit that generates an image showing the movement of the hand-held rotating tool based on the position of the pseudo workpiece, and a display unit that displays the image generated by the image generation unit so as to be visible. Good. With such a configuration, the visual effect when performing a safety experience can be enhanced.

  Furthermore, in the safety sensation apparatus for a hand-held rotary tool having the above-described characteristics, the image generation unit may generate the video by adding an additional video imitating a working state of the hand-held rotary tool. By using sparks at the time of grinding, simulated disaster images at the time of kickback, and the like as additional images, it is possible to further enhance the sense of reality.

  According to the safety sensation apparatus for a hand-held rotary tool having the above-described characteristics, the subject can safely experience the impact of the kickback phenomenon that may occur when using the hand-held rotary tool.

It is a figure for demonstrating the structure of the safety experience apparatus which concerns on 1st Embodiment. It is a figure for demonstrating operation | movement at the time of use of the safety experience apparatus which concerns on 1st Embodiment. It is a figure for demonstrating the structure of the safety experience apparatus which concerns on 2nd Embodiment. It is a figure for demonstrating the structure of the safety experience apparatus which concerns on 3rd Embodiment. It is a figure for demonstrating the structure of the safety experience apparatus which concerns on 4th Embodiment. It is a figure which shows the deformation | transformation form of the safety experience apparatus which concerns on 4th Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment according to a safety experience device for a hand-held rotary tool according to the present invention will be described in detail with reference to the drawings. In the following embodiments, an electric grinder will be described as an example of a hand-held rotating tool, but this is merely an example of a hand-held rotating tool. Therefore, even when the hand-held rotary tool is a circular saw or when the power is air, the adaptability is not affected.

  A hand-held rotary tool safety sensation apparatus (hereinafter simply referred to as a safety sensation apparatus 10) according to the present embodiment is configured based on a simulated grinder 12, an actuator 19, a control unit 30, and a simulated workpiece 100.

  The simulated grinder 12 is a specific example of a simulated rotating tool that imitates a hand-held tool that is a target constituting the safety experience device 10. The simulated grinder 12 has at least a tool body 14, a rotary blade equivalent portion 16, and a load sensor 18. The tool main body 14 is a part that bears at least the handle part of the hand-held rotary tool, and preferably, the tool main body 14 imitates the form of the handle part of the corresponding hand-held rotary tool. This is because when the form is similar to an actual tool, the realism of the simulated experience is improved.

  The rotary blade equivalent part 16 is a part for reproducing the contact state of the rotary blade (grinding stone, saw blade, etc.) to the pseudo workpiece 100 described in detail later. For this reason, although it does not ask in particular about the form, it is desirable to imitate the form of the rotary blade in the corresponding hand-held rotary tool. This is because, similar to the tool main body 14, the realistic experience of the simulated experience is improved by resembling an actual tool.

  In the present embodiment, a load sensor 18 as a sensing unit is provided between the tool body 14 and the rotary blade equivalent unit 16. The load sensor 18 used in the present embodiment plays a role of detecting the pressing load of the rotary blade equivalent portion 16 on the pseudo workpiece 100. For this reason, it is desirable that the detection axis of the load sensor 18 be provided along the pressing direction of the rotary blade equivalent portion 16 in the corresponding hand-held rotary tool. This is because by making the pressing direction of the rotary blade equivalent portion 16 coincide with the detection axis direction of the load sensor 18, the load detection accuracy at the time of pressing is improved. The load sensor 18 outputs the detected load as a displacement signal (voltage) to the control unit 30 described later in detail. Note that the load sensor 18 may be a compression load cell, an acceleration sensor, or the like.

  The actuator 19 may be in any form as long as it can perform an operation capable of forcibly moving (flicking off) the tool body 14. In the present embodiment, the air cylinder 20 is used as the operation unit of the actuator 19. The air cylinder 20 has a cylinder part 22 and a rod part 24. The air cylinder 20 shown in FIG. 1 is of a single-sided rod type, and the cylinder portion 22 is provided with a cylinder chamber and a rod chamber. When air is supplied to the cylinder chamber side, the rod portion 24 is provided. Is extended and the rod portion 24 contracts when air is supplied to the rod chamber side. In any case, the chamber (rod chamber or cylinder chamber) on the opposite side to the side to which air is supplied is opened to the atmosphere.

  In the air cylinder 20 configured as described above, one end of the cylinder portion 22 side or the rod portion 24 side is fixed to the fixing member 102, and the other end portion is connected to the tool body 14. . In the present embodiment, the cylinder portion 22 side is fixed to the fixing member 102 and the rod portion 24 side is connected to the tool body 14. Note that link mechanisms 38 and 40 are provided at the fixing portion between the cylinder portion 22 and the fixing member 102 and the connecting portion between the rod portion 24 and the tool main body 14, respectively. This is because the tool body 14 can be moved by the hand of the subject. As the link mechanisms 38 and 40, like a universal joint, it is good to be able to respond | correspond to various motions, such as diagonally and vertically, and rotation. This is because the tool main body 14 can be moved to an arbitrary position and at an arbitrary angle, and an actual holding method of the hand-held rotating tool, a usage posture, and the like can be embodied.

  An air compressor 26 as an air supply means is connected to the cylinder portion 22 via air supply paths 42a and 42b constituted by an air tube or the like. An electromagnetic valve 28 is provided in the air supply passages 42 a and 42 b located between the cylinder portion 22 and the air compressor 26.

  In the ON state, the solenoid valve 28 connects the air supply path 42a on the cylinder portion 22 side and the air supply path 42b on the air compressor 26 side. On the other hand, in the OFF state, the air supply path 42a on the cylinder part 22 side is opened to the atmosphere, and the air supply path 42b on the air compressor 26 side is closed. ON / OFF control of the solenoid valve 28 is performed by inputting an operation signal output from a control unit 30 described later in detail. In the present embodiment, the air supply path 42a on the cylinder portion 22 side is connected to the cylinder chamber, and the rod chamber side is always open. By adopting such a configuration, the subject can freely operate the tool body 14 in a state where no operation signal is input.

  Here, in the present embodiment, with the subject's viewpoint as a reference, the fixing member 102 is disposed on the right side of the simulated grinder 12, and the connection portion between the rod portion 24 and the tool body 14 is positioned on the distal end side of the tool body 14. did.

  The grinder usually rotates the grindstone so that it rotates clockwise in the working state. For this reason, the relationship between the air cylinder 20 and the tool main body 14 is as described above, so that when the rod portion 24 of the air cylinder 20 extends, the simulated grinder 12 has a handle in the tool main body 14. From the portion as a base point, a counterclockwise force, that is, a force in the direction opposite to the rotation direction of the rotary blade is applied. Thereby, the so-called kickback phenomenon at the time of grinder work can be reproduced.

  The control unit 30 includes at least an amplifier circuit 32, a comparator circuit 34, and a logic operation circuit 36. The amplifying circuit 32 is a circuit to which the displacement signal from the load sensor 18 described above is input, and plays a role of amplifying the weak voltage input as the displacement signal to a voltage that can be compared with a threshold voltage described later and outputting it. Bear. The voltage amplification factor is set in advance.

  The comparator circuit 34 is a comparator that compares the output voltage from the amplifier circuit 32 with a predetermined threshold voltage. The result of comparing the output voltage from the amplifier circuit 32 with the threshold voltage is output to the logic operation circuit 36. For example, when the output voltage from the amplifier circuit 32 is smaller than the threshold voltage, the output from the comparator circuit 34 is 0 V, and when the output voltage from the amplifier circuit 32 is larger than the threshold voltage, the output is output. The voltage may be a predetermined voltage. The predetermined voltage here may be a driving voltage of the logic operation circuit 36.

  The logical operation circuit 36 includes a timer and a relay as an example. That is, when the input voltage to the logical operation circuit 36 is a predetermined voltage, the timer is started, and the relay is turned on for a set time (for example, 0.5 seconds) to output the operating voltage to the solenoid valve 28. . That is, the air cylinder 20 is expanded only within the set time of the timer, and then returns to the atmospheric release state. By adopting such a configuration, it is possible to experience a feeling as if some external force is applied to the grinder for a moment.

  The pseudo workpiece 100 is a member that presses the rotary blade equivalent portion 16 of the simulated grinder 12. By providing the pseudo workpiece 100, it is possible to feel the force applied when the rotary blade equivalent portion 16 is pressed, and to give the subject a sense of reality that grinding or cutting with a hand-held rotary tool is performed. be able to.

  Next, the experience state by the subject of the safety experience device 10 according to the present embodiment and the operation of the device will be described. The subject first holds the tool body 14 in the simulated grinder 12. At the present stage, the rod portion 24 in the air cylinder 20 connected to the tool main body 14 is in an extendable state. Therefore, the subject can freely move the tool body 14 within the expansion / contraction range of the rod portion 24 of the air cylinder 20.

  Next, the test subject brings the rotary blade equivalent portion 16 in the simulated grinder 12 into contact with the simulated workpiece 100 to embody the grinding state by the simulated grinder 12. Here, since the tool main body 14 is in a free state as described above, the subject can also take an actual working posture when using the grinder. The actuator 19 does not operate unless the displacement signal output from the load sensor 18 (the voltage amplified by the amplifier circuit 32) exceeds the threshold voltage, so that the normal grinding state can be experienced in a grinding state with a small load. can do.

  While the subject is experiencing the grinding state, when the pressing load of the rotary blade equivalent portion 16 against the pseudo workpiece 100 increases and the displacement signal exceeds the threshold voltage, the electromagnetic valve 28 is turned on and the air compressor 26 is turned on. Air is supplied from the cylinder chamber. As a result, as shown in FIG. 2, the rod portion 24 of the air cylinder 20 is instantly extended, and the tool body 14 connected to the tip of the rod portion 24 is simultaneously extended with the handle portion as a reference. As a result, it will be blown off by receiving counterclockwise force.

  By such an operation, the subject can experience an impact in which the simulated grinder 12 is forcibly moved (flipped). This allows the subject to know that his / her movement is unlikely to respond to the forced movement of the grinder due to the kickback phenomenon, and the work posture is less likely to be injured when the kickback phenomenon occurs. Etc. can be considered.

  In the embodiment described above, the fixing member 102 of the air cylinder 20 is disposed on the right side of the simulated grinder 12, and the air supply path 42a is connected to the cylinder chamber side. However, such a configuration is an element for reproducing the kickback phenomenon by the extension of the rod portion 24. When the contraction of the rod portion 24 is used, the following configuration can be adopted.

  That is, the fixing member 102 is disposed on the left side of the simulated grinder 12. Note that the left and right in this case are based on the viewpoint of the subject holding the tool body 14. Moreover, the air supply path 42a connected to the cylinder part 22 is connected to the rod chamber side. With such a configuration, the supply of air from the air compressor 26 causes the rod portion 24 to contract, and the kickback phenomenon similar to that in the above embodiment can be reproduced.

  The arrangement position of the fixing member 102 differs depending on the rotation direction of the rotary blade, whether the method for forcibly moving the simulated grinder 12 is pushed or pulled, the working posture of the simulated grinder 12, and the like. Specifically, when the forced movement of the simulated grinder 12 is performed by pushing, the rotating blade is in the direction of rotation (right side if rotating right), and when it is performed by pulling, the direction opposite to the rotating direction (rotation) If the direction is clockwise, it will be placed on the left side.

Next, 2nd Embodiment which concerns on the safety experience apparatus of the hand-held rotary tool of this invention is described, referring FIG.
Most configurations of the safety sensation apparatus 10a according to this embodiment are the same as those of the safety sensation apparatus 10 according to the first embodiment described above. Therefore, portions having the same configuration are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.

  The difference between the safety sensation apparatus 10a according to this embodiment and the safety sensation apparatus 10 according to the first embodiment resides in an actuator for reproducing the kickback phenomenon. Specifically, in the first embodiment, the air cylinder 20 is used as the operation unit of the actuator 19, whereas in the present embodiment, the electric motor 44 is used as the operation unit of the actuator 19a. The kickback phenomenon is reproduced by winding the wire 54.

  A rotating shaft 56 (another rotating shaft), an electromagnetic clutch 46, a constant load transmission pulley 48, and a wire take-up pulley 52 are attached to the electric motor 44. The rotating shaft 56 is a rotating shaft physically separated from a rotating shaft (not shown) of the electric motor 44, and serves as a rotating shaft that supports a constant load transmission pulley 48 and a wire take-up pulley 52, which will be described in detail later. Take a role.

  The electromagnetic clutch 46 plays a role of transmitting a rotational force of a rotating shaft (not shown) of the electric motor 44 to the rotating shaft 56. The electromagnetic clutch 46 operates by receiving an operation signal from the control unit 30, transmits the rotational force of the electric motor 44 to the rotating shaft 56, and forcibly rotates the rotating shaft 56. The rotating shaft 56 is held by a bearing or the like, and is rotatable when the electromagnetic clutch 46 is not operating.

  A constant load transmission belt 58 is wound around the constant load transmission pulley 48, and a load generated by a constant load spring 50 as an accompanying automatic winding mechanism is transmitted to the rotary shaft 56. As a result, the wire 54 wound around the wire winding pulley 52, which will be described in detail later, can be wound and sent out with a predetermined tension.

  A wire 54 is wound around the wire take-up pulley 52 and rotates together with the rotation of the rotary shaft 56 by the action of the constant load spring 50 or the action of the rotational force of the electric motor 44 transmitted by the electromagnetic clutch 46. That is, when the rotation of the rotating shaft 56 is a free rotation, the wire 54 is wound or sent out by the pulling operation of the constant load spring 50 or the simulated grinder 12 by the subject. On the other hand, when the rotation of the rotating shaft 56 is forced rotation, the wire 54 is wound by the rotation of the electric motor 44. A link mechanism 38 is provided at the connection portion between the wire 54 and the tool body 14.

  In the present embodiment, the kickback phenomenon is reproduced by winding the wire 54, that is, by “pulling”. For this reason, the electric motor 44 which is an operation unit of the actuator 19a is fixed to the left side of the simulated grinder 12.

  In the safety sensation apparatus 10a having such a configuration, the pressing load of the rotary blade equivalent portion 16 by the subject on the pseudo workpiece 100 (see FIG. 1) is within a threshold range, that is, the output voltage of the load sensor 18 (amplification by the amplification circuit). If the later voltage is smaller than the threshold voltage, the simulated grinder 12 can be freely operated. This is because when the electric motor 44 and the electromagnetic clutch 46 are not in an operating state, only the tensile load for maintaining the tension by the constant load spring 50 acts on the wire 54.

  On the other hand, when the output voltage of the load sensor 18 exceeds the threshold voltage, an operation signal is output from the control unit 30 to the electric motor 44 and the electromagnetic clutch 46. When an operation signal is input to the electric motor 44 and the electromagnetic clutch 46, the electric motor 44 generates a rotational force, and the electromagnetic clutch 46 transmits the rotational force of the electric motor 44 to the rotating shaft 56. As a result, the wire 54 is wound around the wire winding pulley 52 at a high speed, and the tool body 14 is forcibly moved in the wire winding direction to reproduce the kickback phenomenon.

  Even with the safety sensation apparatus 10a having such a configuration, the same effects as those of the safety sensation apparatus 10 according to the first embodiment can be obtained. When adopting the present embodiment, it is desirable to provide the control unit 30 with a timer function that determines the output time of the operation signal. This is because excessive winding of the wire 54 can be prevented, and damage to the device due to excessive winding of the wire 54 can be prevented.

  Next, 3rd Embodiment which concerns on the safety experience apparatus of the hand-held rotary tool of this invention is described with reference to FIG. In order to simplify the description, the present embodiment will be shown as a modification of the first embodiment. Therefore, portions having the same configuration are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.

  The safety sensation apparatus 10b according to the present embodiment includes an audio reproduction unit 60 and a speaker 70 as audio output means. The sound reproducing unit 60 plays a role of outputting a sound signal stored in advance to the speaker 70 in conjunction with the operation of the simulated grinder 12.

  The audio reproduction unit 60 includes, for example, a logical operation circuit 62, a reproduction circuit 64, a memory 66, an amplifier circuit 68, and the like. The logic operation circuit 62 in the present embodiment is provided with at least three signal input ports and one signal output port. Based on the combination of signals input to the signal input ports, “00, 01, 10 Is output (when the output is binary).

  In the present embodiment, of the three signal input ports, an input signal to the first input port is used as an input signal for a dummy power switch (not shown) of the simulated grinder 12. Further, an input signal to the second input port is an output signal (displacement signal) from the load sensor 18. An input signal to the third input port is an output signal (operation signal) from the control unit 30.

  When a signal is input to the first input port under such input conditions, “00” is output as an output signal from the output port. When a signal is input to the first input port and the second input port, “01” is output as an output signal from the output port. Further, when a signal is input to all of the first to third input ports, “10” is output as an output signal from the output port.

  The reproduction circuit 64 plays a role of selecting audio data stored in the memory 66 based on an output signal from the logic operation circuit 62 and outputting the audio data to the amplifier circuit 68 as an audio signal. Specifically, in the present embodiment, the memory 66 stores idling sound data 66a, grinding sound data 66b, and impact sound data 66c. The idling data 66a is voice data in which idling sound generated when the grinder is operated is stored. Further, the grinding sound data 66b is sound data in which a sound generated when the grindstone in the grinder is brought into contact with the work is stored. Further, the impact sound data 66c is pseudo sound data for effectively experiencing the occurrence of the kickback phenomenon, and may be a burst sound, for example.

  The reproduction circuit 64 selects and reproduces predetermined audio data based on the output signal from the logic operation circuit 62 from the memory 66 storing the audio data as described above. The relationship between the output signal from the logical operation circuit 62 and the audio data to be selected / reproduced is as follows. First, when the output signal from the logic operation circuit 62 is “00”, the idle sound data 66a is selected and reproduced. Next, when the output signal is “01”, the grinding sound data 66b is selected and reproduced. Further, when the output signal is “10”, the impact sound data 66c is selected and reproduced. According to such a configuration, the audio data is reproduced according to the operation of the simulated grinder 12, and the presence of the subject using the safety sensation apparatus 10b can be enhanced.

The reproduced audio data is output to the amplifier circuit 68 as an audio signal, amplified, and output from the speaker 70 as an audible sound.
With the safety experience device 10b having such a configuration, it is possible to more realistically reproduce the disaster experience (kickback experience) of the subject.

  Next, with reference to FIG. 5, 4th Embodiment which concerns on the safety experience apparatus of the hand-held rotary tool of this invention is described. The safety sensation apparatus 10c according to the present embodiment is also characterized in that the basic configuration is the same as that of the safety sensation apparatuses 10 to 10b according to the first to third embodiments described above, and the visual effect is enhanced. To do. Therefore, about the structure which makes the function the same, the same code | symbol shall be attached | subjected to drawing and the detailed description shall be abbreviate | omitted.

  This embodiment is characterized in that an angle sensor 76, an image generation unit 72, and display means 74 are added as a specific configuration. The angle sensor 76 is detection means for detecting the position and posture of the simulated grinder 12 that is moved by the hand of the subject. In this embodiment, the link mechanisms 38 and 40 that connect the simulated grinder 12 and the air cylinder 20 and the air cylinder 20 and the fixing member 102 are preferably at least two axes on the simulated grinder 12 side (link mechanism 38 side). An angle sensor 76 capable of detecting shaft motion is provided.

  With such a configuration, the position and inclination (posture) of the simulated grinder 12 connected to the tip of the air cylinder 20 can be acquired as data (hereinafter referred to as a posture signal).

  The image generation unit 72 is a part that creates an image that reproduces a grinder that operates in accordance with the movement of the simulated grinder 12 that the subject manipulates, a spark that is generated when the rotating blade of the grinder contacts the workpiece, and the like. The image generation unit 72 receives the displacement signal output from the load sensor 18 and the attitude signal output from the angle sensor 76. Based on the input information of the various signals, a video imitating the grinding state is created by combining previously stored grinder images, handle images, workpiece images, spark images, and the like.

  The display unit 74 is a unit for displaying the video created by the image generation unit 72 in a visible state. In the present embodiment, a head-mounted display is employed as the display means 74 in order to enhance the sense of reality as the safety sensation apparatus 10c. As a result, the entire field of view of the subject becomes a display, and the presence is improved.

  With such a configuration, it is possible to add additional images such as sparks that are difficult to reproduce with the simulated grinder 12 and accident images during reproduction of the kickback phenomenon. For this reason, it is possible to give a sense of realism that actual work is being performed, and to visually recognize the situation when an occupational accident occurs. Therefore, a physical experience and a visual experience can be obtained at the same time, and the effect as the experience apparatus can be enhanced.

  In the present embodiment, only the video is added. However, as shown in FIG. 6, in addition to the video, the audio added in the second embodiment may be added. In other words, the audio playback unit 60 and the speaker 70 are added, and the audio that matches the video is played along with the video. By setting it as such a structure, the realistic sensation at the time of using the safety experience apparatus 10c can be raised more.

  In the above-described embodiments, the load sensor 18 is described as the sensing unit that outputs the displacement signal. However, in configuring the present invention, the sensing unit need not be limited to the load sensor 18. That is, a strain gauge or a switch may be used as the sensing unit. When the strain gauge is used, the distortion of the rotary blade equivalent portion 16 or the connecting portion between the rotary blade equivalent portion 16 and the tool body 14 when the rotary blade equivalent portion 16 is pressed against the pseudo workpiece 100 is detected. You can do that. When a switch is used, a push-type switch is arranged at the tip of the rotary blade equivalent portion 16 and the actuator 19, when the pressing load of the rotary blade equivalent portion 16 exceeds the push-back load of the switch, What is necessary is just to make 19a operate | move.

DESCRIPTION OF SYMBOLS 10 ......... Safety sensation apparatus, 12 ......... Mim grinder, 14 ......... Tool body, 16 ......... Rotating blade equivalent part, 18 ......... Load sensor, 19 ......... Actuator, 20 ...... Air cylinder , 22 ......... Cylinder, 24 ......... Rod, 26 ......... Air compressor, 28 ......... Solenoid valve, 30 ......... Control, 32 ......... Amplifier circuit, 34 ......... Comparator circuit, 36... Logic operation circuit 38... Link mechanism 40 40 Link mechanism 42 a Air supply path 42 b Air supply path 100 Pseudo workpiece 102 102 ... fixed member.

Claims (10)

A tool body having at least a handle portion of a hand-held rotary tool;
A rotary blade equivalent portion provided on the tip side of the tool body with the handle portion as a base point ;
A sensing unit for sensing physical displacement when the rotary blade equivalent part contacts the pseudo workpiece;
An actuator for moving the tool body to the left side in the tangential direction of the rotary blade equivalent portion at the contact position of the rotary blade equivalent portion and the pseudo workpiece;
A control unit that outputs an operation signal for operating the actuator by obtaining a displacement signal output from the sensing unit;
A safety sensation device for a hand-held rotary tool characterized by comprising: The control unit includes a comparator that determines whether the displacement signal has reached a predetermined threshold value;
The safety sensation device for a hand-held rotary tool according to claim 1, wherein the operation signal is output when the displacement signal reaches the threshold value. The actuator is an air supply means for supplying air to the air cylinder and the air cylinder,
Between the air cylinder and the air supply means, the cylinder chamber or the rod chamber in the air cylinder is opened to the outside in a non-operating state where the operating signal is not input, and in the operating state where the operating signal is input, the cylinder The safety sensation device for a hand-held rotary tool according to claim 1 or 2, further comprising an electromagnetic valve constituting an air supply path between an air cylinder and the air supply means.   The safety sensation device for a hand-held rotating tool according to claim 3, wherein a link mechanism is provided at a connecting portion between the tool body and the air cylinder. The actuator includes a wire coupled to the tool body;
The safety sensation device for a hand-held rotary tool according to claim 1, further comprising winding means for winding the wire in response to an input of the operation signal. The wire is connected to another rotating shaft attached with an automatic winding mechanism that maintains a predetermined tension,
Between the rotating shaft of the winding means and the other rotating shaft,
The safety experience of a hand-held rotary tool according to claim 5, wherein an electromagnetic clutch is provided that operates in response to the input of the operation signal and transmits the power of the rotary shaft of the winding means to the other rotary shaft. apparatus.   The said control part is provided with the timer function which determines the output time of the said operation signal, The safety experience apparatus of the hand-held rotary tool of Claim 5 or 6 characterized by the above-mentioned. A storage means in which a sound corresponding to each operation when using a hand-held rotary tool is recorded;
Sound output means for outputting the sound as an audible sound;
8. An audio reproduction unit that selects an audio that matches the operation of the tool body from the audio stored in the storage means and outputs the selected audio to the audio output means. The safety experience apparatus of the hand-held rotary tool of any one of these. Detecting means for detecting the position and orientation of the tool body;
An image generation unit that generates an image showing the movement of the hand-held rotary tool based on at least the position of the tool body detected by the detection unit and the predetermined position of the pseudo workpiece;
The safety sensation device for a hand-held rotating tool according to any one of claims 1 to 8, further comprising display means for projecting the image generated by the image generation unit so as to be visible. The safety sensation device for a hand-held rotary tool according to claim 8 or 9, wherein the image generation unit generates the video by adding an additional video imitating a working state of the hand-held rotary tool.