JPH0533012U - Level sensor - Google Patents

Abstract

(57) [Summary] [Purpose] Enables easy and accurate marking work,
Improve workability. A height position of a laser beam is detected by a light receiving section 62, and the height position is relatively displayed by one display element 31 of an analog display section 30. By sliding the pencil or the like along the corresponding guide groove 50, the marking index 21 indicating the height position of the laser beam is inevitably selected, so that the marking operation can be performed easily and quickly. Also,
When the guide groove 50 is clogged, only the marking plate 50a needs to be replaced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a level sensor for detecting the height position of a laser beam projected from an electronic level device.

[0002]

[Prior Art]

 As a conventional level sensor, for example, there is one as shown in FIG.

That is, a body 1 made of resin or the like has a switch 2 for selecting an ON / OFF function and an audio function, a light receiving portion 4 for detecting a laser beam, and a height position of a level sensor as a reference. A display unit 3 is provided that indicates that the position is matched and that indicates the direction from the height position to the reference position, and a mark portion 5 for displaying the reference position is provided on the side edge portion of the body 1. ..

The user moves the level sensor in the vertical direction so that the height position of the laser beam coincides with the reference position, and the marking portion 5 is used for marking with pencils or the like.

Further, in Japanese Patent Application No. 3-76040, the applicant of the present application has proposed the level sensor shown in FIG.

That is, the laser beam is received by the light receiving unit 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 detected in the LCD display unit 7 as the detection result. Appears. 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 for a detection resolution of 1 mm pitch. Select the guide groove 9 that closely corresponds to the position mark 5, and slide the guide groove along the guide groove 9 to the marking side. The guide groove 9 is narrowed to the actual laser beam position and the pitch of 1 mm on the marking side so that the marking object can be marked with a pencil.

[0007]

[Problems to be solved by the device]

 However, in the conventional level sensor shown in FIG. 2, the user first makes a large movement of the level sensor to judge that the height position of the laser beam is near the reference position by the audio function and the like. , For example, while looking at the display unit 3, gradually move the level sensor toward the reference position. At this time, the work must be done with great care so that the height position of the laser beam does not exceed the reference position. In addition, if the height of the laser beam exceeds the reference position due to carelessness, it is necessary to move the level sensor little by little in the opposite direction to the reference position again. There was a problem that it was troublesome, laborious, and workability was not good.

Further, in the case of FIG. 3 proposed in the prior application, the plurality of guide grooves 9 are worn or blocked, and the entire upper case has to be replaced, which makes maintenance difficult. There was a point.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a level sensor which is simple in marking operation and can be easily maintained.

[0010]

[Means for Solving the Problems]

 The gist of the present invention for achieving such an object is to provide a level sensor for detecting the height position of a laser beam projected from an electronic level device, which has a predetermined length in the height direction, A light receiving section (62) for detecting a laser beam, and a plurality of display elements (31) arranged at arbitrary intervals in a predetermined direction, and display the change of the incident position of the laser beam in the height direction. A display unit (30) for displaying by selectively driving the element (31) and a body (10) of the level sensor are detachably provided, and one of both side edges thereof is a side edge of the body (10) of the level sensor. A marking plate (50a) that is substantially coincident with or protrudes from the side edge of the main body (10), and the other side edge thereof is close to the display section (30). A mark part (20) for marking the height position of the beam is provided, and a plurality of lead lines for associating the display part (30) and the mark part (20) with the marking plate (50a). , One end of each leader line (50) faces the corresponding display element (31), and the other end of each leader line (50) faces the corresponding laser element when the display element (31) is driven. The level sensor is located at the same height as the incident position of.

[0011]

[Action]

 When the light receiving section (62) detects the laser beam by roughly moving the level sensor in the vertical direction, the display section (30) is driven so that one of the plurality of display elements (31) relatively determines the incident position of the laser beam. To display.

When one display element (31) is displayed, the movement of the level sensor is stopped, and the leader line (50) whose one end corresponds to the display element (31) Marking is performed using the mark portion (20) in which the other end of (50) extends. Thereby, the marking operation can be performed easily and in a short time.

When the lead wire (50) becomes worn or clogged due to the use of the level sensor and cannot be used, the marking plate (50a) may be replaced with a new one. Thereby, it is not necessary to replace the entire upper case of the level sensor.

[0014]

Embodiment 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 part of the side edge of the body 10 is recessed on the back side to form a thin wall portion. A mark portion 20 is formed on the. The mark portion 20 is made up of marking indexes 21, 21 ... Indented continuously at an interval of 1 mm in the vertical direction and displaying the height position of the laser beam stepwise. 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 which indicates the height position of the actual received laser beam. The LCD display unit 30a has a rectangular display screen that is long in the vertical direction, and has an analog display unit 30 and a digital display unit 40.

The analog display unit 30 is located on the side edge of the display screen on the marking index 21 side, and the height position of the laser beam is stepwise by a horizontal bar line at intervals of 3 mm corresponding to the marking index 21. It comprises a plurality of display elements 31, 31 ,. That is, the display element 31 displays a relative position different from the actual height position.

The digital display unit 40 is located on the side edge portion on the opposite side of the marking index 21 in the display screen, and displays the numerical deviation of the height position of the laser beam with respect to the reference position. It is in the vertical position and the direction of deviation is indicated by an arrow.

A marking plate 50a is detachably attached to the body 10. One of the both side edges of the marking plate 50a substantially coincides with the side edge of the body 10 or is located at a position projecting outward from the side edge of the body 10, and the other side edge is close to the LCD display section 30a. Is formed in. The marking plate 50a is gradually recessed rearward from the other side edge to one side edge because the side edge of the body 10 is thin.

A guide groove 50, which is a plurality of lead lines, is formed on the marking plate 50a. One groove end of each guide groove 50 closely corresponds to each display element 31 of the analog display section 30, and the other groove end of each guide groove 50 extends to each marking index 21 corresponding to each display element 31. It has been overrun. The guide groove 50 is colored for easy selection, and the guide groove 50 is formed in a V-shaped or U-shaped cross section.

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

Further, 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 confirming 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, and the level sensor 10a is used within the radius.

The operator turns on the power with the switch unit 61 and, for example, while paying attention to the bubble tube 63, greatly moves the level sensor 10 a in the vertical direction, and the light receiving unit 62 emits the laser beam from the electronic level device. When the light is received, the central value of the laser beam is detected by a detection circuit (not shown).

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 and an arrow in the deviation direction are displayed on the digital display unit 40 of the LCD display unit 30a. .. As a result, the worker moves the LCD display unit 30a up and down slightly based on the display on the digital display unit 40 so as to eliminate the deviation.

When the LCD display unit 30a is moved up and down little by little and, for example, the height position of the laser beam and the reference position happen to coincide with each other, the digital display unit 40 displays a numerical value 0, as shown in FIG. An up arrow and a down arrow are displayed, and one of the display elements 31 of the analog display unit 30 is turned on.

When one display element 31 of the analog display unit 30 is turned on, the operator stops the movement of the level sensor 10a and guides the displayed analog display unit 30 such that one of its groove ends approaches. Insert the pencil into the groove 50, slide the pencil along the guide groove 50, and drop the pencil into the marking index 21 where the other groove end extends, at the dropped position, such as the wall on the back side of the body 10. Mark on the object to be measured.

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

If the guide groove 50 is clogged and cannot be used due to long-term use, the marking plate 50a may be replaced with a new one. For example, the entire upper case of the body 10 may be replaced. No need to replace.

In the above-described embodiment, the guide line 50 is provided as the lead wire, but the lead wire is not limited to this and may be formed 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 indexes 21 may be arranged at a pitch of 0.5 mm.

Furthermore, if two types of marking plates 50a, a metric type and an inch type, are prepared, it is possible to deal with them only by exchanging the marking plate 50a.

According to the level sensor 10a according to the above-described embodiment, the direction in which the height position of the laser beam is displaced with respect to the reference position of the level sensor, and the amount of displacement are displayed as a digital amount. As a result, the level sensor can be moved accurately and quickly, and there is an advantage that speedy work can be performed.

[0036]

[Effect of the device]

 According to the level sensor of the present invention, the height position of the laser beam is detected by the light receiving unit, and the height position is relatively displayed by one display element of the display unit. By following the lead line corresponding to the element, the marking index indicating the height position of the laser beam can be inevitably selected, so that the marking work can be performed easily and quickly. In addition, if the leader line becomes worn, it is only necessary to replace the marking plate and maintenance is easy.

[Brief description of drawings]

FIG. 1 is a front 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.

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

[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 50a ... Marking plate 50 ... Guide groove (leader wire)

Claims (1)

[Scope of utility model registration request] 1. A level sensor for detecting the height position of a laser beam projected from an electronic level device, comprising: a light receiving portion having a predetermined length in the height direction and detecting the laser beam; A display unit having a plurality of display elements arranged at arbitrary intervals, which displays a change in the incident position of the laser beam in the height direction by selectively driving the display element, and is attached to or detached from the body of the level sensor. A marking plate which is provided so that one of its both side edges substantially coincides with or projects from the side edge of the main body of the level sensor, and the other side edge of which is close to the display section, A mark portion for marking the height position of the laser beam is provided on one side edge, and the marking plate is also provided with a mark portion for associating the display portion with the mark portion. 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 is at 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.