JP2575870Y2 - 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 toward a wall surface.

[0002]

2. Description of the Related Art As a conventional level sensor, for example,
There is one as shown in FIG. That is, a V-shaped center mark 25 is recessed at the side edge of the body 21 of the level sensor, and a light receiving section 24 for detecting a laser beam on the body 21 and an LCD display section 23 for displaying the incident position of the laser beam. Is provided.

[0003] The body 21 is moved up and down so that the laser beam is incident on a predetermined position of the light receiving section 24. Marking is done.

[0004]

However, in such a conventional level sensor, since the marking is made with an pit or the like in accordance with the center mark 25, the accuracy is low.
There is a problem that the marking position varies depending on the user.

There is another problem that both hands are required for the marking operation.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a level sensor capable of performing a marking operation accurately and quickly with one hand.

[0007]

The gist of the present invention for achieving the object is as follows.
1 In a level sensor for detecting a height position of a laser beam projected from an electronic level device toward a wall surface (11), the level sensor is provided on a front side of a level sensor main body (10),
A light receiving section (1) for outputting position information indicating a height position of the laser beam with respect to a reference position on a level sensor; and a marking provided on the back side of the main body (10) for marking a mark on the wall surface. A level sensor, comprising: a device (7); and a driving device (6) for controlling a marking position of the marking device (7) based on the position information.

The marking device (7) has a marking device (71) that can be moved up and down, and the driving device (6) controls the marking device so that the marking position matches the height position of the laser beam. Item 2. The level sensor according to Item 1, wherein the marking device (71) is moved.

[0009]

When the level sensor main body (10) is moved up and down with the one hand holding the level sensor main body (10) against the wall surface (11), the light receiving section (1) detects the laser beam, Position information indicating the height position of the beam is output.

The driving device (6) controls the position of the marking point of the marking device (7) based on the position information of the light receiving section (1).
The marking device marks the indicia on the wall (11).
At this time, it is also possible to start the marking device with one hand.

[0011]

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

FIGS. 1 and 2 show an embodiment of the present invention.

As shown in FIG. 2, a detector 1 is provided at a side edge on the front side of the level sensor main body. The detector 1 has vertically-arranged photoelectric conversion elements (not shown) arranged to detect the position of the laser beam.

A display device 4 is provided adjacent to the detector 1. In addition, on the front side of the level sensor body,
A main switch 8 and a buzzer window 9 are provided. The display device 4 is an LCD, and has a position mark portion indicating the height position of the laser beam by up and down arrows, and a digital display portion indicating the height position of the laser beam by a numerical value.

As shown in FIG. 1, a detection circuit 2 is connected to the detector 1. The CPU 3 is connected to the detection circuit 2. The display device 4 and the driving device 6 are connected to the CPU 3.

The driving device 6 controls the driving of the marking device 7 based on the position information output from the CPU 3. An execution button 5 for outputting a marking execution signal to the CPU 3 is connected to the CPU 3.

As shown in FIG. 2, the marking device 7 comprises
An execution button 5 is provided at a side edge of the level sensor main body, and is provided below the marking device 7 at a position where the level sensor can be pressed with an index finger or the like while holding the level sensor when holding the level sensor with the right hand. .

The driving device 6 and the marking device 7
Will be described in detail with reference to FIG.

The marking device 7 includes the level sensor body 1
0 and a frame 70 integrated therewith, and a marking device 71 provided therein. An opening 72 is formed in the frame 70 on the back surface side of the level sensor body, and the marking device 71 is arranged at a position exposed to the opening 72. Marker 71
Has a stamped portion formed of porous rubber or the like at the tip, and is configured such that the stamp ink is supplied from the inside of the stamping device 71 to the stamped portion. Slidably held.

The drive device 6 includes a male screw 60 rotatably supported at both ends by a frame 70 and screwing with a female screw passing through a case 73, and a gear 6 fixed to one end of the male screw 60.
1 and a pulse motor 6 having a gear 62 meshing therewith
3, a plunger (not shown) provided in the case 73 for sliding the marking device 71, and a motor drive circuit 6 for outputting a pulse signal to the motor 63 in response to a command from the CPU 3.
4, a driving circuit 65 for driving the plunger in response to a command from the CPU 3, and a pin 6
And a limit switch 67 connected by the switch 6.

Next, the operation will be described. Level sensor body 1
When the 0 main switch 8 is turned on, the CPU instructs the drive device 6 to perform an initial setting. That is, the male screw 60 is rotated by the pulse motor 63, the case 73 of the marking device 7 is lowered, and the switch 67 is turned on. At this time, the marking device 71 is in a position retracted toward the case 73 as shown.

While holding the level sensor with the right hand, it moves up and down while touching a wall surface (not shown). At this time, the execution button 5 can be pressed with the index finger.

In this state, the level sensor main body 10 is
1, and when the detector 1 receives the laser beam,
The height position information of the laser beam is output to the CPU 3 by the detection circuit 2 as a digital quantity.

The CPU 3 transmits the position information to the display device 4
And display it in numerical form.

In FIG. 2, the display device 4 displays "-5" and an upward arrow. This indicates that the position of the laser beam is shifted downward by 5 mm from the vertical center position of the detector 1.

The CPU 3 converts a deviation of the incident position of the laser beam on the detector 1 (a height position in a direction parallel to the longitudinal direction of the male screw 60) into a moving distance from the initial position of the marking device 71 and a motor driving circuit. 64. The motor drive circuit 64 outputs a pulse signal corresponding to the rotation amount of the pulse motor 63 necessary to move the marking device 71 by the above-mentioned movement distance. The rotation of the pulse motor is gear 6
3, the mark point 71 is moved together with the case 73 in the direction of arrow A in FIG. 3, so that the mark point at the tip of the mark point 71 has the same height as the laser beam. Confronts the wall surface 11. That is, "-" is displayed on the display device 4.
In the state where “5” is displayed, the dot device faces the wall surface which is shifted downward by 5 mm from the vertical center position of the detector 1.

When the execute button 5 is pressed with the index finger, the CPU
3 issues a mark command to the drive circuit 65 to drive the plunger in the case 73 to make the mark device 71 protrude in the direction of arrow B in FIG. The marking device 7 is not limited to a marking device, and may be, for example, a device that performs marking by striking an ink ribbon in a mother type and printing form, or a thermal or inkjet printer. Further, the shape of the mark point is not limited to the bar shape, and may be a round shape and a cross mark. Further, the color of the mark point is not limited to black, and may be red or white. Further, the shape and color of the mark may be freely interchangeable.

[0028]

[0029]

[0030]

According to the level sensor of the present invention, the position of the marking point of the marking device is controlled based on the position information of the laser beam with respect to the reference position on the level sensor. Even when the marking operation is performed in a state where the position does not match the above, automatic marking on the wall surface at the actual height position of the laser beam or at a position at a predetermined distance from the position becomes possible.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a level sensor according to an embodiment of the present invention.

FIG. 2 is a perspective view of the level sensor showing one embodiment of the present invention.

FIG. 3 is a schematic configuration diagram illustrating an example of a driving device and a marking device in FIG. 1;

FIG. 4 is a front view of a level sensor showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Detector 2 ... Detection circuit 3 ... CPU 4 ... Display device 5 ... Execution button 6 ... Drive device 7 ... Marking device 8 ... Bubble tube for inclination confirmation 9 ... Buzzer window 60 ... Male screw 63 ... Pulse motor 64 ... Motor drive circuit 65 Drive circuit 71 Marking device 73 Case

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01C 5/00 G01C 15/02

Claims (2)

(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 toward a wall, wherein the level sensor is provided on a front side of a level sensor main body, and the laser beam is positioned relative to a reference position on the level sensor. A light receiving unit that outputs position information indicating a height position, a marking device that is provided on the back side of the main body, and marks a mark on the wall surface, and a mark point position of the marking device based on the position information. A level sensor, comprising: a driving device for controlling. 2. The marking device has a marking device that can be moved up and down, and the driving device moves the marking device so that the marking position matches the height position of the laser beam. The level sensor according to claim 1, wherein: