JP4342484B2 - Monitoring device - Google Patents

Description

  The present invention relates to a monitoring device capable of switching the direction of a detector such as various sensors or an imaging device.

Conventionally, as a monitoring device for switching the direction of a detector such as an infrared sensor or an imaging device over 360 ° or more, an infrared sensor is connected to a motor output shaft through a holder or the like, and the infrared sensor is moved around the motor axis along with the holder by the motor A configuration in which the rotation is performed is known (see Patent Document 1).
Japanese Patent Laid-Open No. 9-72781

  However, in the configuration disclosed in Patent Document 1, when the infrared sensor rotates once, the wiring drawn from the infrared sensor also rotates once. Therefore, when the direction of the infrared sensor is repeatedly switched, the wiring is wound around the motor output shaft or the like. There is a problem that.

  In view of the above problems, an object of the present invention is to provide a monitoring device that does not cause twisting or wrapping in wiring drawn from a detector even when the direction of the detector is rotated 360 ° or more. There is.

  In order to solve the above problems, in the present invention, in a monitoring device having a detector from which wiring is drawn out and a drive device that switches the direction of the detector, the direction in which the detector is facing, the detector An axis that is parallel to the direction that faces or that forms a predetermined angle with the direction that the detector faces is defined as a first axis, and extends in a direction that intersects the first axis and the direction that the detector faces. The driving device causes the detector to rotate around the second axis when viewed from the second axis, and the rotation around the second axis when viewed from the second axis. In this case, the detector is rotated once around the first axis in the opposite direction to the rotation around the second axis.

  In the monitoring device according to the present invention, when the detector is rotated around the second axis by the driving device, the direction of the detector is switched. At this time, when viewed from the second axis, the detector rotates once around the first axis once during the rotation around the second axis, and in the direction opposite to the rotation around the second axis. To do. For this reason, before and after the detector rotates around the second axis, the wiring is always located in the same direction with respect to the first axis as viewed from the detector. For this reason, even if the direction of the detector is rotated over 360 ° or more, the wiring drawn from the detector is not twisted and does not wind.

In the present invention, the driving device transmits a shaft body extending in the first axial direction while holding the detector, a motor, and a rotation output of the motor to the shaft body to transmit the shaft. A transmission member for causing the body to revolve around the second axis, and the shaft and the shaft in a state in which rotation around the first axis is allowed at a position spaced apart from the second axis in the radial direction. A coupling mechanism that couples the transmission member; and a bearing mechanism that supports the shaft body in a state in which the rotation and the revolution are allowed . As a result, when the shaft body performs the revolution while facing the same angular direction around the first axis, when viewed from the second axis , the shaft body makes one revolution around the second axis once. While performing, the rotation is automatically performed once in the direction opposite to the revolution. Accordingly, there is no need for a drive system for rotating the shaft body during one revolution of the shaft body. Therefore, the monitoring device can be configured in a small and inexpensive manner.

Furthermore, in the present invention, the output shaft of the motor is located on the second axis, the bearing mechanism, which is configured at the intersection between the shaft body and the second axis, the monitoring device Can be made compact.

  In the present invention, the connection mechanism includes a connection mechanism ball portion formed on one of the shaft body and the transmission member, and a connection mechanism receiving portion that receives the connection mechanism ball portion on the other side. The bearing mechanism includes a bearing mechanism ball portion formed on one of the shaft body and the fixed support plate, and a bearing mechanism receiving portion receiving the bearing mechanism ball portion on the other side. It is preferable. If comprised in this way, the connection mechanism and bearing mechanism which allow the rotation to each direction can be comprised with a small and simple structure.

  In the present invention, the coupling mechanism is configured on one end side of the shaft body, the detector is held on the other end side of the shaft body, and the bearing mechanism is disposed at an intermediate position in the length direction of the shaft body. It is preferable that If comprised in this way, a motor can revolve a shaft with a small force.

  In the monitoring device according to the present invention, when the detector is rotated around the second axis by the driving device, the direction of the detector is switched. At this time, when viewed from the second axis, the detector rotates once around the first axis once during the rotation around the second axis, and in the direction opposite to the rotation around the second axis. To do. For this reason, before and after the detector rotates around the second axis, the wiring is always located in the same direction with respect to the first axis as viewed from the detector. For this reason, even if the direction of the detector is rotated over 360 ° or more, the wiring drawn from the detector is not twisted and does not wind.

  A monitoring apparatus to which the present invention is applied will be described below with reference to the drawings.

(principle)
FIG. 1 is an explanatory diagram showing the principle of a monitoring apparatus to which the present invention is applied. In FIG. 1, the monitoring device 1 of the present invention includes a detector 80 from which a wiring 83 is drawn, and a drive device (not shown) for switching the direction of the detector 80. In the monitoring device 1, the drive device causes the detector 80 to rotate around the second axis L2 extending in the direction intersecting the axis L1 parallel to the direction L0 in which the detector 80 faces (θ rotation). When viewed from the second axis L2, the detector 80 rotates once around the first axis L1 (ψ rotation) once around the second axis L2 while rotating around the second axis L2 once. This is done in the opposite direction to the rotation.

  That is, when the monitoring device 1 is viewed from the outside, the detector 80 does not rotate around the first axis L1 when performing the θ rotation around the second axis L2, and does not rotate the same around the first axis L1. While rotating in the angular direction, it rotates θ around the second axis L2.

  In the monitoring apparatus 1 configured as described above, when the detector 80 is rotated by θ around the second axis L2 by the driving device, the direction L0 of the detector 80 is, for example, the direction indicated by the dotted line from the direction indicated by the solid line. Switch to. At this time, when viewed from the second axis L2, the detector 80 performs one rotation of ψ about the first axis L1 and one second rotation about the second axis L2 while performing θ rotation about the second axis L2. It is performed in the direction opposite to the surrounding θ rotation. Therefore, before and after the detector 80 rotates around the second axis L2, the wiring 83 is always drawn in the same direction as viewed from the detector 80, and the wiring 83 is connected to the first axis L1. Always in the same direction. For this reason, even if the direction of the detector 80 is rotated over 360 ° or more, the wiring drawn out from the detector 80 is not twisted and wound.

(Specific configuration of the device)
2, 3 and 4 are a side view, a bottom view and a cross-sectional view, respectively, of a monitoring device to which the present invention is applied.

  The monitoring device 1 shown in FIGS. 2, 3, and 4 rotates the detector 80 made of an infrared sensor or the like over a range of 360 ° or more by the driving device 2, thereby changing the direction of the detector 80 to be monitored. And includes a detector 80 from which the wiring 83 is pulled out to the side, a holder 81 for holding the detector 80 inside, and the driving device 2.

  In this embodiment, a connector 82 is fixed to the side surface of the holder 81, and a wiring 83 is connected to the detector 80 using this connector 82. The lower surface of the holder 81 is in an open state, and the detector 80 is exposed downward from the lower surface opening. The detector 80 is disposed at a position shifted from the center of the holder 81, and the direction in which the detector 80 faces is indicated by an arrow L0 in FIG.

  In this embodiment, the driving device 2 is connected to the shaft body 10 holding the detector 80 at the lower end portion via the holder 81, the stepping motor 22 with the output shaft 220 extending downward, and the output shaft 220 of the stepping motor 22. The disc-shaped transmission member 24 is provided. Here, the shaft body 10 extends in a first axis L1 substantially parallel to the direction L0 in which the detector 80 faces. Further, the output shaft 220 of the stepping motor 22 is located on the second axis L2 extending in the direction intersecting the first axis L1. As for the stepping motor 22, the motor main body is being fixed to the ceiling via the fixing tool 60 grade | etc.,. The connecting plate 26 is fixed to the lower surface of the motor body of the stepping motor 22, and the upper end portion of the support plate 28 is fixed to the bent portion of the end portion of the connecting plate 26. The support plate 28 is bent downward from the side of the transmission member 24 toward the lower end portion of the shaft body 10 and crosses the portion through which the second axis L2 passes.

  In the driving device 2 of the present embodiment, the transmission member 24 transmits the rotation output of the stepping motor 22 to the shaft body 10, and performs the revolution (θ rotation) around the second axis L2 on the shaft body 10 and the detector 80. And is coupled to the upper end portion of the shaft body 10 via the coupling mechanism 30 at a position spaced apart from the second axis L2 in the radial direction. The coupling mechanism 30 supports the upper end portion of the shaft body 10 while allowing the revolution of the shaft body 10 around the second axis L2 and the rotation (φ rotation) around the first axis L1 of the shaft body 10. Yes. As such a coupling mechanism 30, in this embodiment, a coupling mechanism ball 31 formed on the upper end portion of the shaft body 10 and a hemispherical shape formed on the transmission member 24 side and into which the coupling mechanism ball 31 is fitted. A connection mechanism receiving portion 32 is used.

  In the driving device 2 of the present embodiment, the second axis L2 of the shaft body 10 is located between the lower end portion of the shaft body 10 and the support plate 28 at the intersection of the second axis L2 and the shaft body 10. A bearing mechanism 40 that supports the shaft body 10 is configured in a state in which the surrounding revolution and the rotation around the first axis L1 of the shaft body 10 are allowed. As such a bearing mechanism 40, in this embodiment, a ring-shaped bearing mechanism ball 41 formed on the lower end of the shaft body 10 and a ring-shaped bearing mechanism ball 41 formed on the support plate 28 side are fitted. A bearing mechanism receiving portion 42 is used. Here, a hole 421 is formed in the bottom portion of the bearing mechanism receiving portion 42, but since the hole 421 is smaller than the bearing mechanism ball portion 41, the bearing mechanism receiving portion 42 is located below the shaft body 10. It also has a function to prevent it from falling off. On the other hand, the coupling mechanism 30 prevents the shaft body 10 from being displaced upward. In this embodiment, the shaft body 10 is restricted from moving up and down by the coupling mechanism 30 and the bearing mechanism 40. The shaft body 10 and the holder 81 are connected through a hole 421.

(Operation and effect of this form)
FIG. 4 is an explanatory diagram showing how the direction of the detector changes in the monitoring apparatus to which the present invention is applied. In the monitoring device 1 of this embodiment, when the stepping motor 22 is operated, the rotation of the output shaft 220 of the stepping motor 22 is transmitted to the upper end portion of the shaft body 10 via the transmission member 24, and as shown in FIG. The body 10 revolves (rotates θ) while performing a rub motion around the second axis L2. As a result, the attitude of the shaft body 10 is switched, and accordingly the attitude of the detector 80 is switched, so that the direction L0 in which the detector 80 faces is switched. Therefore, if the shaft body 10 is revolved 360 °, the direction L0 in which the detector 80 faces also rotates 360 °. Moreover, since it is only necessary to revolve the shaft body 10 in an angle range of 180 ° or less, it is possible to make the detector 80 face in a predetermined direction in a short time, regardless of which direction the detector 80 is desired to face.

  At that time, in the coupling mechanism 30 and the bearing mechanism 40, both the revolution around the second axis L2 of the shaft body 10 and the rotation around the first axis L1 of the shaft body 10 are possible. When performing one revolution operation around the second axis L2, when viewed from the second axis L2, the shaft body 10 performs one revolution around the first axis L1 in the opposite direction to the revolution. When this state is viewed from the outside of the monitoring device 1, the detector 80 does not rotate around the first axis L1 when performing the revolution around the second axis L2, but the same angle around the first axis L1. Revolving around the second axis L2 while facing the direction. Therefore, although the orientation of the detector 80 is switched as the posture of the shaft body 10 is switched due to revolution, the wiring 83 connected to the detector 80 is not twisted even if it is slightly swung. Moreover, it does not wind around the shaft body 10.

  Further, in this embodiment, the detector 80 rotates around the second axis L2 together with the shaft body 10, but the detector 80 is always located in the same direction with respect to the shaft body 10. For this reason, even if the direction of the normal direction of the detector 80 is rotated 360 °, the coordinate system on the detector 80 does not change before and after the revolution, so that the analysis of the detection result is easy.

  Furthermore, in this embodiment, since the shaft body 10 is automatically rotated by the revolution of the shaft body 10 by free rotation in the bearing mechanism 40, the shaft body 10 is moved during one revolution operation of the shaft body 10. A drive system for rotating around the axis L1 of the shaft body 10 is not necessary. Therefore, the monitoring device 1 can be configured small and inexpensively.

  Further, the output shaft of the stepping motor 22 is located on the second axis L2, and the bearing mechanism 40 is configured at the intersection of the second axis L2 and the shaft body 10. For this reason, the monitoring apparatus 1 can be comprised small.

  The coupling mechanism 30 is configured on the upper end side of the shaft body 10, the detector 80 is coupled to the lower end side of the shaft body 10, and the bearing mechanism 40 is disposed at a position between the coupling mechanism 30 and the detector 80. Therefore, the stepping motor 22 can revolve the shaft body 10 with a small force. Therefore, a small and inexpensive one may be used as the stepping motor 22.

(Other embodiments)
In the embodiment described above, a structure in which the direction L0 in which the detector 80 faces and the first axis L1 that is the axis of the shaft body 10 is parallel is adopted, but the direction L0 in which the detector 80 faces and the first axis L1. Or a structure in which the direction L0 in which the detector 80 faces and the first axis L1 that is the axis of the shaft body 10 form a predetermined angle may be employed. In the above embodiment, an infrared sensor is used as the detector 80, but an imaging device or the like may be used as the detector 80. In the above embodiment, the stepping motor 22 is used as the drive source of the drive device 2, but other DC motors or AC motors may be used. Further, the drive source of the drive device 2 may be manually performed instead of the motor. Further, in the above-described embodiment, the vertical movement of the shaft body 10 is restricted by the coupling mechanism 30 and the bearing mechanism 40, but the vertical movement of the shaft body 10 is one of the coupling mechanism 30 and the bearing mechanism 40. May be regulated. Furthermore, in the said embodiment, although it was the structure which makes the shaft body 10 autorotate by the revolution of the shaft body 10 by the free rotation in the bearing mechanism 40, it synchronizes with the revolution of the shaft body 10, A configuration in which the shaft body 10 is forced to rotate may be employed.

It is explanatory drawing which shows the principle of the monitoring apparatus to which this invention is applied. It is a side view of a monitoring device to which the present invention is applied. It is a bottom view of a monitoring device to which the present invention is applied. It is sectional drawing of the monitoring apparatus to which this invention is applied. It is explanatory drawing which shows a mode that the direction of a detector changes in the monitoring apparatus to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Monitoring apparatus 2 Drive apparatus 10 Shaft body 22 Stepping motor 24 Transmission member 28 Support plate 30 Connection mechanism 40 Bearing mechanism 80 Detector 81 Holder 82 Connector 83 Wiring L0 The direction which the detector is facing L1 1st axis L2 2nd Axis

Claims (3)

In a monitoring device having a detector from which wiring is drawn and a drive device for switching the direction of the detector,
A direction in which the detector faces, a direction parallel to the direction in which the detector faces, or an axis that forms a predetermined angle with the direction in which the detector faces is a first axis,
When the axis extending in the direction intersecting the first axis and the direction in which the detector is facing is the second axis,
The driving device includes a shaft body extending in the first axial direction while holding the detector, a motor having an output shaft positioned on the second axis, and a rotational output of the motor as the shaft body. A transmission member for transmitting to the shaft body and causing the shaft body to revolve around the second axis, and a state in which rotation about the first axis is allowed at a position spaced radially from the second axis And a connecting mechanism for connecting the shaft body and the transmission member, and an intersection between the second axis and the shaft body, and supporting the shaft body in a state in which the rotation and the revolution are allowed. And a bearing mechanism that
The shaft body makes the detector rotate around the second axis by performing the revolution while facing the same angular direction around the first axis, and viewed from the second axis. When the revolution about the second axis is performed once, the detector automatically rotates once in the direction opposite to the revolution, so that the detector rotates once about the second axis. A monitoring apparatus characterized in that the detector is rotated once around the first axis while performing in a direction opposite to the rotation around the second axis. 2. The connection mechanism according to claim 1, wherein the connection mechanism includes a connection mechanism ball portion formed on one of the shaft body and the transmission member, and a connection mechanism receiving portion that receives the connection mechanism ball portion on the other side. Prepared,
The bearing mechanism includes a bearing mechanism ball portion formed on one of the shaft body and the fixed support plate, and a bearing mechanism receiving portion that receives the bearing mechanism ball portion on the other side. A monitoring device. In Claim 1 or 2, the connection mechanism is configured on one end side of the shaft body,
The detector is held on the other end side of the shaft,
The monitoring device according to claim 1, wherein the bearing mechanism is disposed at an intermediate position in the length direction of the shaft body.

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