JP2563066Y2 - 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.

In Japanese Utility Model Application Laid-Open No. 3-76040, the present applicant has proposed a level sensor shown in FIG.

That is, the laser beam is received by the light receiving section 6, the center position of the laser beam is detected by a detection circuit (not shown), and the digital display 8a and the position mark 8b are simultaneously displayed in the LCD display section 7 as a detection result. Will be The position mark 8b is displayed at a position different from the actual laser beam position, and the display pitch of the position mark 8b is 3 mm with respect to the detection resolution of 1 mm. The guide groove 9 corresponding to the position mark 5 is selected, and the guide groove 9 is slid along the guide groove 9 to the marking side. The guide groove 9 is narrowed down to the actual laser beam position and the pitch of 1 mm on the marking side, so that the target object of the marking is marked with an pit.

[0007]

However, in the conventional level sensor shown in FIG. 2, the user first moves the level sensor largely, and uses the audio function or the like to start the operation.
It is determined that the height position of the laser beam is near the reference position, and then the level sensor is gradually moved in the direction of the reference position while looking at the display unit 3, for example. At this time,
Care must be taken 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.

Further, in the case of FIG. 3 proposed in the prior application, a plurality of guide grooves 9 are worn or clogged, so that the entire upper case must be replaced, and there is a problem that maintenance is not easy. .

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 which can perform a marking operation easily and can be easily maintained.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a level sensor for detecting a height position of a laser beam projected from an electronic level device. The laser beam has a length, and has a light receiving portion (62) for detecting the laser beam, and a plurality of display elements (31) arranged at arbitrary intervals in a predetermined direction, and the laser beam can be placed in the height direction. A display unit (30) for displaying a change in the incident position of the display element by selectively driving the display element (31) and a main body (10) of the level sensor are detachably provided, and one of both side edges of the main body (10) of the level sensor is A marking plate (50a) substantially coincident with or protruding from the side edge of the main body (10), and the other side edge being close to the display portion (30); ), A mark portion (20) for marking the height position of the laser beam is provided on one side edge, and the display portion (30) and the mark portion (20) are provided on the marking plate (50a). A plurality of leader lines to be associated are drawn, and one end of each leader line (50) faces the corresponding display element (31), and each leader line (50)
Is located at the same height as the incident position of the laser beam when the opposing display element (31) is driven.

[0011]

[Function] By roughly moving the level sensor up and down,
When the light receiving section (62) detects the laser beam, the display section (30) is driven and one of the plurality of display elements (31) relatively displays the incident position of the laser beam.

When one display element (31) is displayed, the movement of the level sensor is stopped, and the display element (3) is stopped.
According to a leader line (50) whose one end corresponds to (1), the other end of the leader line (50) extends to the mark portion (2).
Mark using 0). Thus, the marking operation can be performed easily and in a short time.

With the use of the level sensor, the lead wire (5
In case 0) becomes worn or clogged and cannot be used, the marking plate (50a) may be replaced with a new one. This eliminates the need to replace the entire upper case of the level sensor.

[0014]

Hereinafter, an embodiment of the present invention will be described 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 part of a side edge portion of the body 10 is concavely formed on the back side to form a thin portion.
The mark portion 20 is formed in the thin portion. Mark part 2
0 is a marking index 2 that is continuously recessed at 1 mm intervals in the vertical direction and indicates the height position of the laser beam in a stepwise manner.
., 21... The marking index 21 located at the center in the vertical direction is the reference position. That is, in this embodiment, the detection resolution of the level sensor 10a is 1 mm pitch.

An LCD display unit 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 has a marking index 2
A plurality of display elements 31, 31,... Representing the height position of the laser beam stepwise by a horizontal bar at intervals of 3 mm corresponding to 1.
Consists of That is, the display element 31 displays a relative position different from the actual height position.

The digital display unit 40 is located at a side edge of the display screen opposite to the marking index 21 and displays the amount of deviation of the height position of the laser beam from the reference position as a numerical value. In the vertical position, the deviation direction is indicated by an arrow.

The body 10 is provided with a detachable marking plate 50a. Marking plate 5
0a is located at a position where one of the side edges substantially coincides with the side edge of the body 10 or protrudes outside the side edge of the body 10;
The other side edge is formed so as to approach the LCD display unit 30a. The marking plate 50a is attached to the body 10
Since the side edges of the are thin portions, they are gradually recessed rearward from the other side edge to one side edge.

A guide groove 50 as a plurality of lead lines is formed in the marking plate 50a. One groove end of each guide groove 50 closely corresponds to each display element 31 of the analog display unit 30, and the other groove end of each guide groove 50 extends to each marking index 21 corresponding to each display element 31. Have been. 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 sounds through the buzzer window 64, and a numerical value of a shift amount of the height position of the laser beam with respect to the reference position and an arrow in the shift direction are displayed on the digital display unit 40 of the LCD display unit 30a. . As a result, the operator, based on the display on the digital display unit 40,
The LCD display unit 30a is moved up and down little by little so as to eliminate the deviation.

The LCD display section 30a is moved up and down little by little. For example, when the height position of the laser beam coincides with the reference position by accident, as shown in FIG. A directional arrow and a downward arrow are displayed, and one of the display elements 31 of the analog display unit 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.

In the above-described operation, the case where the height position of the laser beam coincides with the reference position by accident is shown. For example, when the level sensor 10a is moved small, one display element of the analog display unit 30 is displayed. When the light 31 is turned on, the analog display unit 30 at 3 mm intervals is turned on at that time without continuing the movement adjustment work of the level sensor 10a until the height position of the laser beam completely matches the reference position. By sliding the pencil along the guide groove 50 corresponding to one display element 31 and narrowing it down to the mark portions at 1 mm intervals, the marking operation can be completed simply, quickly and reliably.

When the guide groove 50 is clogged and cannot be used due to long-term use or the like, the marking plate 50a may be replaced with a new one.
There is no need to replace the entire upper case of the body 10.

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

If the detection resolution of the level sensor 10a is 0.5 mm, for example, the display elements 31 may be arranged at a pitch of 3 mm, and only the marking indices 21 may be arranged at a pitch of 0.5 mm.

Furthermore, if two types of marking plates 50a are prepared: a meter type and an inch type,
This can be dealt with simply by replacing the marking plate 50a.

According to the level sensor 10a according to the embodiment, in which direction the height position of the laser beam is shifted with respect to the reference position of the level sensor and how much the laser beam is shifted are displayed as digital quantities. Therefore, there is an advantage that the level sensor can be moved accurately and quickly, and that a speedy operation can be performed.

[0036]

[Effect of the invention] According to the level sensor according to the invention,
If the height position of the laser beam is detected by the light receiving unit, the height position is relatively displayed by one display element of the display unit, and the lead line corresponding to the one display element is traced. Since the marking index indicating the height position of the laser beam can be selected inevitably, the marking operation can be performed easily and quickly. Further, when the lead wire is worn, it is only necessary to replace the marking plate and maintenance can be easily performed.

[Brief description of the drawings]

FIG. 1 is a front view of a level sensor showing one embodiment of the present invention.

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

FIG. 3 is a front view of the level sensor disclosed in the prior application.

[Explanation of symbols]

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

Claims (1)

(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 display unit having a plurality of display elements arranged at arbitrary intervals and displaying a change in the incident position of the laser beam in the height direction by selectively driving the display elements; A marking plate in which one of the two side edges substantially coincides with or protrudes from the side edge of the main body of the level sensor, and the other side edge is close to the display unit. A mark portion for marking the height position of the laser beam is provided on one side edge, and the display plate and the mark portion are associated with the marking plate. Draw a number of leader lines, one end of each leader line faces the corresponding display element, and the other end of each leader line has a height equal to the incident position of the laser beam when the facing display element is driven. A level sensor characterized by being placed.