JPS6321518Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stopper detection device for detecting the opening and closing of a lamp cover of a ro-ro boat, for example.

Generally, as shown in FIG. 1, a ro-ro boat is provided with a lamp 1 for communicating between upper and lower decks 2 and 3, and a lamp cover 5 for opening and closing the lamp opening 4 is provided. The lamp cover 5 is provided with a locking device 6 on the hull wall for holding it in the open position.

As shown in FIG. 2, this lock device 6 is provided with a stopper 7 which engages with an arm 9 provided on the side of the lamp cover 5 and is rotatable via a shaft 8. This stopper 7 has a support 10 that prevents it from rotating to the lock position, and a spring 11 that biases it in the direction of rotation to the lock position.
A hydraulic cylinder 12 or the like is provided which rotates the stopper 7 to a release position in which it does not engage the arm 9 against the biasing force of the spring 11.

The locking device 6 also includes a stopper position detection switch 13L that contacts the stopper 7 in the locked position to turn on and off, and a lamp cover position detection switch 13R that contacts the arm 9 and turns on and off in the locked position. A stopper detection device is provided which detects whether or not the lamp cover 5 is securely locked based on the operation of both.

This means that if only one of the detection switches is used, for example, if only the detection switch 13L is used, then the stopper 7
Even if the position of the lamp cover 5 can be confirmed, it cannot be determined whether the lamp cover 5 is actually in the locked position or not. Also, with only the detection switch 13R, even if the lamp cover 5 is in the locked position, the stopper 7 cannot be correctly locked. This is because it is not possible to confirm whether the
Both detection switches are always required from the standpoint of safety.

However, the provision of two detection switches in this way has the problem that adjustment during installation is troublesome, and the impact force when the stopper 7 contacts the support 10 via the spring 11 causes the detection There is a problem in that the switches 13L and 13R tend to malfunction, and if one of them breaks down, safety is significantly compromised for the reasons mentioned above.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a stopper detection device with a simple structure that is not affected by the impact when the stopper device is activated.

Therefore, in the present invention, a sensor that outputs a signal when a detection piece approaches the stopper protruding position is attached to a supported member such as a lamp cover, while the detection piece is provided on the stopper side.

According to the above structure, since only the stopper receives the impact when the stopper is drawn to the lock position, the sensor side is not affected by the impact.

In addition, the sensor outputs only when the stopper is in the protruding position where it can be locked and the supported member comes into contact with the stopper, so one sensor can simultaneously detect the locked state of the stopper and the position of the supported member. Therefore, the configuration and installation of the sensor section becomes easy.

Embodiments of the present invention will be described below based on the accompanying drawings. Note that the same components as those of the conventional example are given the same reference numerals.

As shown in FIG. 3, a sensor 16 is attached to the arm side surface 9A, and a detection piece 17 is attached to the stopper side surface 7A.
Install. These two are arranged so that they are in a close positional relationship in a locked state in which the arm lower surface 9B and the stopper upper surface 7B are in contact with each other.

This sensor 16 may be, for example, an optical sensor that includes a light emitting section and a light receiving section and that converts light reflected by a reflecting plate into an electrical signal. In this case, the detection piece 17 (reflection plate) is attached to the stopper 7 so as to be located within the substantially conical detectable range of the optical sensor 16 in a locked state.

Further, the sensor 16 may be a magnetic sensor 16 that outputs an electrical signal in response to magnetic changes, and in this case, the detection piece 17 is formed of a magnetic material.

Note that the sensor 16 may be embedded in the arm lower surface 9B.

When the lamp cover 5 is opened, as shown by the imaginary line,
The lamp cover 5 is pulled up once by rotating the stopper 7, and the stopper 7 is pulled up by the spring 1.
After it automatically returns to the lock position again by the urging force of 1, it descends and comes into contact with the top surface 7B of the stopper, and is held in the locked state.

At this time, as shown in FIG.
returns to the locked position below the lamp cover 5,
The detection piece 17 is close to the sensor 16 and
within the detectable range. At this time, the sensor 16 outputs a detection signal to notify that the stopper 7 and lamp cover 5 are in the locked state.

On the other hand, if the stopper 7 does not return for some reason and the lamp cover 5 continues to descend, the lock condition is not detected and it can be immediately determined that the lock is defective.

Further, since the sensor 16 is attached to the lamp cover 5 side, the operation of the lock device 6 can be detected without directly receiving the impact when the lock device 6 is activated.

As described above, in the present invention, since a sensor is attached to the lamp cover side that outputs a signal when a detection piece approaches, the operation of the locking device can be reliably detected without being affected by the impact. Furthermore, since there is no need to provide sensors at multiple locations, the maintenance thereof, the configuration of the mounting portion, the mounting work, etc. are simplified. It is clear that the present invention can be applied to other applications than detecting the position of a lamp cover as long as it is automatically locked by a spring.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional example, and FIG. 2 is an enlarged side view of the locking device section thereof. FIG. 3 is a side view showing an embodiment of the present invention. FIG. 4 is an explanatory diagram of the operation. 4...Lamp opening, 5...Lamp cover, 7
...Stopper, 9...Arm, 16...Sensor, 17...Detection piece.

Claims (1)

[Scope of utility model registration request] In a stopper mechanism consisting of a stopper that protrudes to an engagement position through the biasing force of a spring, and a supported member supported by the stopper in the protruding position, when a detection piece approaches the stopper protrusion position, a detection signal is generated. 1. A stopper detection device, characterized in that a sensor that outputs 1 is attached to a supported member, and the detection piece is provided on the stopper.