JPH0641143Y2 - Photo detector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention receives the measuring light of a laser beam in a leveling instrument for radiating a laser beam or the like, which is used in the construction and construction industries, for performing leveling measurement. The present invention relates to a photodetector having a light receiver and a display for displaying the result of the measurement based on the signal from the light receiver.

[Prior Art] A photodetector configured to detect the intensity of light or the irradiation position of light by photoelectric conversion and display the measurement result is applied in each industrial field. As an example, there can be mentioned a rotary irradiation type leveling instrument that sets a horizontal reference in construction, piping in the construction industry, floor finishing, ready-mixed concrete, block laying work, and the like. As shown in FIG. 5, this surveying instrument uses a laser beam 103 emitted from a leveling instrument main body 102 mounted on a tripod 101 to a staff 104.
This is a general-purpose device in which a worker operates a light receiver 106 attached to a clamp 105 to measure a projection center and obtains a horizontal reference.

In such a photodetector, generally, a light receiving unit for receiving the irradiated light and a display unit for displaying the measurement result to the outside based on the signal photoelectrically converted by the light receiving unit are arranged on the same plane. It is set up.

[Problems to be Solved by the Invention] According to the configuration of the conventional photodetector as described above, the display unit for displaying the measurement result is arranged in parallel on the plane at the same position as the light receiving unit. In order for a person to read the measurement result or set the horizontal reference while moving the photodetector by looking at the display, accurate measurement results cannot be obtained if the person can be positioned directly facing the display unit. . However, there is a problem that when the worker directly faces the display unit of the photodetector, the irradiation light incident on the light receiving unit is blocked and the measurement is hindered.

In order to solve these, the rear surface of the photodetector, that is,
The one with the display on the back side of the light receiving part, the one with the display on both sides of the light receiving part, which can be seen from the side by the operator by slightly tilting it toward the front side of the light receiving part so that they approach each other toward the back. Although there has been proposed a device in which a reflecting mirror is provided on the display portion so that the display can be confirmed from the side surface, it has not been sufficient. In the case of using these photodetectors in construction, in measurement at the corner of a structure, the light receiving part is often removed from the staff and used alone. In such a case, the above proposal is made. The above-described photodetector has a problem that it is difficult to check the display section from the side surface and the back surface.

An object of the present invention is to provide a photodetection device capable of accurately reading the display on the display unit if an operator is positioned within a range in which the display device can rotate and tilt with respect to the photodetection device. I am trying.

[Means for Solving the Problems] In order to achieve the above object, a photodetector according to the present invention is provided with a light receiver and a display unit separately, and the light detection unit and the display unit are combined to perform the light detection. To configure the device so that the display can be rotated 180 ° in the horizontal direction, it is attached to the horizontal axis frame by a rotating mechanism composed of a rotary shaft, a rotation guide pin, and a rotation guide groove.
Tilt up to 180 ° The column provided on the display and the column of the horizontal axis frame are supported by the horizontal axis and have a bending fixing screw, and the display is oriented in a direction different from the direction in which the light receiver faces. It was made possible.

[Operation] The indicator of the photodetector configured as described above can rotate 180 ° in the horizontal direction regardless of the position where the light receiver faces, and can tilt in the front-rear direction up to 180 °. Therefore, the operator does not have to face the light detection device one by one, and the display can be accurately confirmed at the position where it is most easy to work. That is, the operator can move and fix the display on the photodetector to a position facing the measurement.

[Embodiment] An embodiment will be described with reference to the drawings. In FIG. 1, the photodetector comprises a light receiver 1 and a display 4, and a light receiving window is provided on the front surface of the light receiver 1 and a vertically long light receiving window. A light receiving section 2 and a control panel 3 each having a plurality of light receiving elements for detecting a laser beam rotatably emitted from a leveling instrument are provided. As shown in FIG. 1, the display unit 4 sends the output voltage of each light receiving element built in the light receiving unit 2 to the display unit 5 by the code 12 to drive the light emitting device and the like in the display unit 5, and Arrow,
A horizontal slit and an upward arrow are displayed, and the display unit 5 is provided on the front surface. As shown in FIG. 3, the display 4 is provided with a rotation shaft 16 and a rotation guide groove 10 for rotating the display 4 by 180 ° on its lower frame.

On the other hand, the horizontal axis frame 8 has a shaft hole fitted with the rotary shaft 16 of the display 4.
17 and a rotation guide pin 9 that fits in the rotation guide groove 10. Further, a rotation shaft fixing screw 7 is provided via a leaf spring 18 to regulate the rotation of the display 4 if necessary. It is provided so that it can be screwed into 16 and fastened to the horizontal frame 8.

Then, in order to enable the display 4 to be tilted back and forth and bent, the columns 14 and 14 'of the light receiver 1 and the columns 15 and 15' of the horizontal axis frame 8 are moved by the horizontal axis 6 as shown in FIG. It is pivotally supported. Bending fixing screw for adjusting and fixing the tilt angle that tilts back and forth
13 is provided on the horizontal axis frame 8, which allows front and rear 180
It can be fixed by tilting it up to a limit of °.

Next, a description will be given of a usage example of the photodetector configured as described above.
Is fixed and adjusted to the position where it is most easily seen, and while confirming the display on the display unit 5 and moving the photodetector in the direction orthogonal to the reference horizontal plane of the laser light, the indicator 4 indicating that the center position of the laser light is set. Confirmation measurement is performed by the display of the horizontal slit of the display unit 5. That is, the light receiving portion 2 of the light receiving device 1 of the light detecting device is always kept accurately facing the light source such as the laser beam rotatably irradiated from the horizontal surveying instrument, and the position where the display device 4 faces may be set as necessary. Is operated by operating the rotary shaft fixing screw 7 and the bending fixing screw 13 to freely change the horizontal direction and the front-back direction.

[Advantages of the Invention] As described above, according to the present invention, the light receiver and the display can be separated, the display can be tilted horizontally or in the front-back direction, and can be rotated in a range of 180 °. Since it is configured so that the operator can move the indicator and fix it at a position facing the operator, accurate measurement can be performed, and the operator can block the measurement light. There is nothing.

Therefore, it is possible to prevent the occurrence of measurement error and to make the measurement at the corner portion extremely easy.

[Brief description of drawings]

FIG. 1 is a front view of the photodetector of the present invention, FIG. 2 is a side view of the photodetector, FIG. 3 is a partial sectional view of the rear of the photodetector, and FIG. 4 is a conventional photodetector. The perspective view which shows the use condition of the rotary irradiation type leveling instrument which used. DESCRIPTION OF SYMBOLS 1 ... Light receiving device, 2 ... Light receiving part, 4 ... Display device, 5 ... Display part, 6
... horizontal axis, 7 ... rotary axis fixing screw, 8 ... horizontal axis frame, 9 ... rotation guide pin, 10 ... rotation guide groove, 13 ... bending fixing screw, 16 ...
Rotation axis, 14,14 '... Receiver column, 15,15' ... Horizontal frame column

Claims (1)

[Scope of utility model registration request] 1. A photodetector having a light receiver for receiving measurement light on the front surface for photoelectric conversion, and a display for displaying a measurement result based on the output of the light receiver. ° Rotating shaft for horizontal rotation, rotation guide pin,
The rotation mechanism consisting of the rotation guide groove and the indicator are
A photodetector characterized by having a horizontal axis that is inclined up to 180 ° and a bending fixing screw so that the display can be oriented in a direction different from the direction in which the light receiver faces when the display moves.