JP2563064Y2 - Level sensor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level sensor for detecting a height position of a laser beam projected from an electronic level device.

[0002]

2. Description of the Related Art As a conventional level sensor, for example,
There is such as shown in FIG.

[0003] That is, the body 1 made of resin or the like is turned on.
A switch 2 for selecting an / OFF function, an audio function, a light receiving section 4 for detecting a laser beam, and a signal indicating that the height position of the level sensor coincides with the reference position. A display unit 3 is provided to indicate the reference position, and a mark unit 5 for displaying a reference position is provided on a side edge of the body 1.

[0004] A user moves the level sensor up and down to match the height position of the laser beam with the reference position,
Marking is performed by using a mark portion 5 with an epile or the like.

[0005]

However, in such a conventional level sensor, the user first moves the level sensor largely, and the height position of the laser beam is close to the reference position by an audio function or the like. Then, the level sensor is gradually moved in the direction of the reference position while watching the display unit 3, for example. At this time, work must be performed with great care so that the height position of the laser beam does not exceed the reference position. Also, if the height position of the laser beam exceeds the reference position due to carelessness, it is necessary to move the level sensor gradually in the opposite direction in the direction of the reference position again. There was a problem that it was troublesome, time-consuming, and poor in workability.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a level sensor capable of performing a marking operation easily and accurately and improving operability. And

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the gist of the present invention is as follows. 1. A level sensor for detecting a height position of a laser beam projected from an electronic level device is provided in a height direction. A light receiving unit (6) having a predetermined length and detecting the laser beam
2) and a plurality of marking indices (21) arranged on the side edge of the main body (10) of the level sensor at predetermined intervals in the height direction of the laser beam, and at the predetermined intervals in the height direction. A plurality of display elements (31) arranged and corresponding to the marking indices (21), respectively, and the change of the incident position of the laser beam in the height direction is determined.
An analog display unit (30) for displaying by selectively driving the display element (31), and the marking indices for associating the plurality of marking indices (21) with the plurality of display elements (31), respectively. A level sensor comprising: (21) a plurality of leader lines connecting between the plurality of display elements (31).

[0008] The plurality of marking indices (21) have a reference position which is a reference height position of the laser beam, and the height position of the laser beam detected by the light receiving section (62) is determined by the reference position. 2. The level sensor according to claim 1, further comprising a digital display section (40) indicating the amount of displacement from the position and the direction of the displacement.

3. The level sensor according to claim 1, wherein each of the plurality of lead lines is formed by a guide groove (50) at the time of marking using the marking index (21).

The reference position is located at the center of the plurality of marking indices (21) in the height direction, and is distinguished from other marking indices (21).

[0011]

[Function] By roughly moving the level sensor in the height direction,
When the light receiving section (62) detects the laser beam and the level sensor moves within a predetermined range in the vertical direction, the height position of the received laser beam is changed by one display element (31) of the analog display section (30). Is displayed.

When the height position is displayed, the movement of the level sensor is stopped, a leader line corresponding to the one display element (31) is selected, and a plurality of marking indices (21) are selected according to the leader line. ) Is selected and marking is performed using the selected marking index (21). Thus, the marking operation can be performed easily and in a short time.

In the apparatus having the digital display section (40), when the level sensor is roughly moved in the height direction, the height position of the laser beam is eventually displayed as the amount of deviation from the reference position and the direction of deviation. In addition, the moving amount and moving direction of the level sensor can be quickly and accurately indicated, and the marking operation can be performed easily and in a short time.

In the case where the lead line is formed by the guide groove (50), when the height position of the received laser beam is displayed by one display element (31) of the analog display section (30), the one line is displayed. By moving, for example, an pencil or the like along the guide groove (50) corresponding to the display element (31), the corresponding marking index (21) can be reliably selected without erroneous recognition.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

As shown in FIG. 1, the body 10 of the level sensor 10a is formed of a resin material, and a mark 20 protruding laterally is formed on a side edge of the body 10.
The mark section 20 is provided with marking indices 21, 21... Which are successively engraved in the vertical direction at intervals of 2 mm and indicate the actual height position of the laser beam in a stepwise manner. The marking index 21 located at the center in the vertical direction is the reference position.

An LCD display section 30a is provided to indicate the actual height position of the received laser beam. The LCD display unit 30a has a vertically long rectangular display screen, and has an analog display unit 30 and a digital display unit 40.

The analog display section 30 is located at a side edge of the display screen on the side of the marking index 21, and corresponds to each marking index 21 at the same 2 mm interval as the marking index 21 in a stepwise manner. Are represented by horizontal bar lines.

The digital display unit 40 is located at a side edge of the display screen opposite to the marking index 21 and has a numerical value representing a shift amount of the height position of the laser beam with respect to the reference position.
In addition, + and-, which are the directions of up and down shifts, are also described, and furthermore, the shift directions are indicated by arrows at upper and lower positions on the display screen.

Each display element 31 of the analog display section 30
, One groove end of each guide groove 50, which is a lead line, corresponds to each other. The other groove end of each guide groove 50 is
Each marking index 21 corresponding to each display element 31 is extended. The guide groove 50 is colored so as to be easily selected, and the guide groove 50 is formed in a V-shaped or U-shaped cross section.

The body 10 is provided with a switch section 61 such as a power ON / OFF switch and an audio buzzer switch.

The body 10 is provided with a light receiving portion 62 in which photoelectric conversion elements (not shown) for detecting the height position of the laser beam are arranged, a bubble tube 63 for checking the inclination of the body 10, and a buzzer window 64. ing.

Next, the operation will be described.

An electronic level device (not shown) projects a laser beam in a radius of about 200 m, for example.
The level sensor 10a is used within a range of its radius.

The operator turns on the power by the switch unit 61.
N, for example, while paying attention to the bubble tube 63, the level sensor 10a is largely moved
2 receives the laser beam from the electronic level device,
A detection circuit (not shown) detects the center value of the laser beam.

Before and after, a buzzer sound is emitted through the buzzer window 64, and a numerical value of the deviation amount of the height position of the laser beam with respect to the reference position, ± of the deviation direction, and an arrow are displayed on the digital display unit 40 of the LCD display unit 30a. Is done. Thereby, the operator moves the LCD display unit 30a up and down little by little based on the display on the digital display unit 40 so as to eliminate the deviation.

When the LCD display section 30a is moved up and down little by little, for example, as shown in FIG. 1, +2 and an upward arrow are displayed on the digital display section 40,
One display element 31 of the analog display section 30 is turned on.

One display element 31 of the analog display section 30
Is turned on, the operator stops the movement of the level sensor 10a, inserts an edge into the guide groove 50 whose one end corresponds to the displayed analog display section 30, and inserts the edge along the guide groove 50. Is dropped into the marking index 21 at which the other groove end extends, and the measuring object such as the wall on the back side of the body 10 is marked at the dropped position.

That is, when the level sensor 10a is largely moved and the laser beam enters the light-receiving area of the light-receiving section 62, the digital display section 40 is displayed. Display element 31
When is turned on, the actual height position of the laser beam can be easily and accurately marked at that time, and the movement adjustment operation of the level sensor 10a is performed until the height position of the laser beam completely matches the reference position. No need to continue.

In the above-described embodiment, the guide groove 50 is provided as the lead line. However, the present invention is not limited to this. For example, the lead line may be formed by a color-coded line.

Although the marking indices 21 are arranged continuously at intervals of 2 mm, the marking indicators 21 may be spaced at intervals of 1 mm in order to increase accuracy. In this case, it is needless to say that the display elements 31 of the analog display section 30 are also displayed at intervals of 1 mm.

[0033]

[Effect of the invention] According to the level sensor according to the invention,
The height position of the laser beam is detected by the light receiving unit, the height position of the laser beam is displayed in analog on the display element, and if the lead line corresponding to the display element is followed, a marking index indicating the height position of the laser beam Is inevitably selected, so that the marking operation can be performed easily and accurately, and the workability can be improved.

In addition, the direction in which the height position of the laser beam deviates from the reference position of the level sensor and the degree of the deviation are displayed as a digital amount, so that the level sensor can be moved accurately and quickly. It can be adjusted, and a quick marking operation can be performed.

Further, since the lead line is formed by the guide groove, if the pencil or the like is moved along the guide groove, the corresponding marking index can be selected without mistaken recognition, and the marking operation can be performed. Certainty can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a level sensor according to an embodiment of the present invention.

FIG. 2 is a front view of a level sensor showing a conventional example.

[Explanation of symbols]

 10a Level sensor 20 Mark part 21 Marking index 30a LCD display part 30 Analog display part 31 Display element 40 Digital display part 50 Guide groove (lead line)

Claims (3)

(57) [Scope of request for utility model registration] 1. A level sensor for detecting a height position of a laser beam projected from an electronic level device, comprising: a light receiving portion having a predetermined length in a height direction and detecting the laser beam; A plurality of marking indices arranged at predetermined intervals in the height direction of the laser beam on a side edge of the main body of the laser beam; Having an element,
A change in the incident position of the laser beam in the height direction, an analog display unit that displays by selectively driving the display element, to associate the plurality of marking indices with the plurality of display elements, respectively. A level sensor comprising: a plurality of lead lines connecting the marking index and the plurality of display elements. 2. The method according to claim 1, wherein the plurality of marking indices have a reference position that is a reference height position of the laser beam, and the height position of the laser beam detected by the light receiving unit is determined by an amount of deviation from the reference position. 2. The level sensor according to claim 1, further comprising a digital display unit that indicates the shift direction and the shift direction. 3. The level sensor according to claim 1, wherein each of the plurality of lead lines is formed by a guide groove at the time of marking using the marking index.