JP3041330B2 - Light beam position measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light beam position measuring apparatus used for marking out a reference position when constructing a building such as a building.

[0002]

2. Description of the Related Art Heretofore, in the inking work for determining a reference position of a building, for example, a horizontal level, one worker installs a level near the center of the floor and another worker sets a level near the wall. I support the staff and perform black ink while checking them visually.

In recent years, in order to save labor, a rotary laser device (trade name “Beamer”) that rotates and scans a laser beam instead of a level around a reference line, for example, a vertical line.
2 ", Nippon Speed Shore Co., Ltd.) and performing black ink while checking the trajectory of the light beam irradiated on the wall surface is becoming widespread. At this time, the laser beam may be directly visually observed and marked with a writing instrument such as a felt pen, but in order to prevent optical damage to the naked eye, a light beam detection device equipped with a photoelectric conversion element such as a phototransistor. Is provided on the wall to confirm the position of the light beam.

A conventional light beam detecting device includes a photoelectric conversion element for receiving a scanned light beam. When the photoelectric conversion element receives the light beam, an LED (light emitting diode) or the like emits light. A display or a sound generated by a buzzer or the like notifies the worker of light beam detection. The worker performs marking corresponding to the reference line provided with the light beam detecting device when such light or sound is confirmed. In this way, the horizontal level of each wall surface is determined, and it is possible for one person to perform the blackout operation.

[0005]

However, in the conventional light beam detecting device, even if the light beam position is detected with high accuracy, the marking position by the operator fluctuates and individual differences occur. There is a problem that the accuracy of blackout is reduced.

In addition, the operator must handle and mark the light beam detector alone, which is extremely complicated and requires skill.

[0007] An object of the present invention is to provide a light beam position measuring device that can be easily handled and can perform a blackout operation with high accuracy in order to solve the above-mentioned problems.

[0008]

According to the present invention, there is provided a light beam receiving means for receiving a light beam for scanning a surface of a test object, and the light beam receiving means based on a signal from the light beam receiving means. A notifying means for notifying by sound or light that the means has received the light beam; and, based on a signal from the light beam receiving means, when the light beam receiving means detects the light beam, Marking means for marking the position of the light beam on the surface of the pen, the marking means being a reciprocating moving member, a pen holding member for holding a pen, and a moving member and a pen holding member. And a spring member interposed therebetween. Further, in the invention, it is preferable that the marking means includes an eccentric cam for driving a moving member, a motor for rotating and driving the eccentric cam, a clutch interposed between the eccentric cam and the motor, and an interposition between the eccentric cam and the motor. And a speed reducing gear.

[0009]

According to the present invention, it is possible to detect whether or not a light beam has passed a predetermined position by a light beam receiving means for receiving a light beam that scans the surface of the test object. . In addition, the notification means for notifying the light beam receiving means of receiving the light beam by sound or light can promptly notify the worker of the aiming of the light beam. Further, when the light beam receiving means detects the light beam, by the marking means for marking the light beam position on the surface of the test object, the light beam position quickly,
And it becomes possible to record with high accuracy. Further, in the marking means, by interposing a spring member between the reciprocating motion member and the pen holding member for holding the pen, unnecessary force does not act on the pen tip, and the tip of the pen can be prevented from being crushed. The reciprocating hit point of the pen can be easily realized by using a combination of an eccentric cam, a motor, a clutch, and a reduction gear as a mechanism for driving the moving member.

[0010]

FIG. 1 is a schematic perspective view showing a use state of a light beam position measuring apparatus 10 according to one embodiment of the present invention. The light beam position measuring device 10 is mounted on a table 6 provided near a wall 5 of a building. On the other hand, light beam 3
Is mounted on a tripod 2 and installed near the center of the room. Although the rotation reference line in FIG. 1 is set as a vertical line, a configuration in which the rotation reference line is a horizontal line and rotation scanning in the vertical direction is performed may be used.

The light beam 2 emitted from the rotating laser device 1 is scanned in the direction S to form a scanning line 4 on the wall 5 which appears as a light streak. On the front panel 11 of the light beam position measuring device 10, four light receiving elements PA, PB, PC, and PD including a photodiode and a phototransistor are arranged at equal intervals in the vertical direction as shown in the partial plan view of FIG. The light spot 3a of the light beam 3 scans in the horizontal direction, and is arranged on one of the light receiving elements PA to PD according to the relative position between the light beam position measuring device 10 and the light beam 3. Incident. The size of the spot 3a of the light beam 3 is determined so that both can receive light when scanning the intermediate portion between the two light receiving elements.

When the scanning position of the light beam 3 is detected, when the worker gradually lowers along the wall 5 while holding the light beam position measuring device 10, the light beam 3 first enters the light receiving element PD. I do. At this time, the light emitting element LED3 is turned on, and an indication that the scanning position of the light beam 3 should be moved upward is displayed. Further, when the light beam position measuring device 10 is gradually lowered and the light beam 3 scans an intermediate portion between the light receiving element PB and the light receiving element PC, the light emitting element LED3 is turned off and the light emitting element LED2 is turned on. An indication that the scanning position of the light beam is at the reference position is displayed. In parallel with this operation, as shown in FIG. 1, the marking unit 12 provided on the back surface of the light beam position measuring device 10 operates to perform blacking on the scanning line 4 of the wall 5. Further, the light beam position measuring device 10 is gradually lowered, and when the light beam 3 stops entering the light receiving element PC, the light emitting element LED2 is turned off.
The light emitting element LED1 is turned on, and an indication that the scanning position of the light beam 3 should be moved downward is displayed. In this way,
The blacking of the scanning position of the light beam 3 can be performed.

FIG. 3 shows the light beam position measuring device 10 of FIG.
FIG. 4 is a configuration diagram showing a marking unit 12 of FIG.
FIG. 4 is a partial cross-sectional view showing an internal mechanism of the pen driving unit 20 shown in FIG. The configuration of the marking unit 12 will be described below. An output shaft 14 of a motor 13 rotating at a predetermined rotation speed is connected to a rotation shaft 16 via an electromagnetic clutch 15, and four gears Ga, Gb, Gc, Gd. And a rotation shaft 18 of an eccentric cam 19 via a speed reduction portion 17 composed of As shown in FIG. 4, the pen driving unit 20 includes a cylindrical outer cylinder 21,
A triple cylinder mechanism including a cylindrical inner cylinder 22 and a pen gripping cylinder 26 is adopted, and the inner cylinder 22 reciprocates via a flat plate 23 installed obliquely by rotation of the eccentric cam 19. Have been.

The outer cylinder 21 is fixed to a part of the housing of the light beam position measuring device 10, and an inner cylinder 22 is provided so as to slide on the inner surface thereof. In order that the space between the protrusion 21a on the pen tip side of the outer cylinder 21 and the step 22a of the inner cylinder 22 is expanded,
The coil spring 24 is mounted, and the projection 21b at the rear end of the outer cylinder 21 and the projection 22b of the inner cylinder 22 are engaged with each other to regulate the moving range of the inner cylinder 22.

On the other hand, a pen gripping cylinder 26 is provided so as to slide on the inner surface of the inner cylinder 22, and a coil spring 25 is provided so that the space between the projection 22 c of the inner cylinder 22 and the projection 26 a of the pen gripping cylinder 26 is expanded. Is mounted, and the projection 26c on the rear end side of the pen gripping cylinder 26 regulates the moving range. A pen chuck 27 is provided at the tip of the pen gripping cylinder 26 and grips a pen 28 such as a felt pen.

With such a configuration, the electromagnetic clutch 1
When the pen 5 is connected for a predetermined time and the eccentric cam 19 rotates by a predetermined angle, the pen 28 can reciprocate to mark the wall 5. When the tip of the pen 28 comes into contact with the wall 5, the coil spring 25 absorbs the movement of the inner cylinder 22, so that unnecessary force does not act on the pen tip,
Prevents crushing of the pen tip.

FIG. 5 shows the light beam position device 10 of FIG.
FIG. 3 is a circuit diagram showing an electrical configuration of the electronic device, and includes a light receiving unit 40, a determination unit 41, a buzzer unit 42, a display unit 43, a pen operation unit 44, and the like. In the light receiving section 40, four light receiving elements P
Resistors RA to RD are respectively connected as loads of A to PD, and outputs of the light receiving elements PB and PC are connected to inverting inputs of open collector output type comparators G1 and G2. The discrimination voltage VA obtained by dividing the power supply voltage VD by the resistors R1 and R2 is input to the non-inverting inputs of the comparators G1 and G2. The outputs of the comparators G1 and G2 are connected to the inverting inputs of the open collector output type comparators G3 and G4, and the discrimination voltage VA is input to the non-inverting inputs of the comparators G3 and G4. Note that, between the inverting inputs of the comparators G3 and G4 and the power supply voltage VD,
Pull-up resistors R3 and R4 and capacitor C3
C4 are respectively connected in parallel. Note that the capacitors C3 and C4 have a role of integrating the pulse signal and shaping it into a smooth waveform.

On the other hand, the outputs of the comparators G1 and G2 are
The signals are output as signals B and C via the knot elements G5 and G6. The outputs of the comparators G3 and G4 are connected to each other, and input to the base of the transistor T4 via a resistor R13 having one end connected to a pull-up resistor R12. The transistor T4 has an emitter grounded, its collector is connected to the electromagnetic clutch 15, and the power supply voltage V
DC power supply V for applying a predetermined DC voltage to D
E is connected. The power supply voltage VD is supplied to the motor 13, and the operation of the motor 13 is controlled by the switch SW.

Next, in the judging section 41, the output signals A and D of the light receiving elements PA and PD and the output signals B and C of the knot elements G5 and G6 are supplied from the light receiving section 40, and the signal A is supplied to the OR element G7. The signal B is input to one end, and the signal B is
And the other end of the AND element G8, the signal C
Is input to the other end of the AND element G8 and one end of the OR element G9, and the signal D is input to the other end of the OR element G9. The output of the OR element G7 is input to one end of the AND element G10 via the diode D1. The AND element G1
The input of 0 is grounded via a capacitor C5 and a resistor R5. The output of the AND element G8 is the knot element G
The signal is input to the other end of the AND element G10 and one end of the AND element G1 via the switch 18, and is connected to the grounded capacitor C7 and the resistor R7 via the diode D4, and is output as the signal Y2 or the signal Z2. The output of the OR element G9 is connected to the grounded capacitor C6 and one end of the resistor R6 via the diode D3, and is input to the other of the AND element G11. The output of the AND element G10 is input to one end of the OR element G12 and is output as a signal Z1. AND element G11
Is input to the other end of the OR element G12 and output as a signal Z3. The output of the OR element G12 is output as a signal Y1. Note that the capacitor C
5, C6 and C7 have a role of integrating the pulse signal and shaping it into a smooth waveform.

Next, in the buzzer section 42, a low-frequency oscillation circuit including NAND elements G13 and G14, feedback resistors R8 and R9, and capacitors C1a and C1b, NAND elements G16 and G17, and feedback resistors R10 and R1 are provided.
1. A high frequency oscillation circuit including a capacitor C2 is formed. The signal Y1 is input to the other end of the NAND element G13, the signal Y2 is input to the other end of the OR element G15, and the output of the NAND element G17 is It is connected to a piezoelectric buzzer BZ.

On the other hand, in the display section 43, the light emitting element LE
D1, LED2, and LED3 are respectively connected to respective bases of transistors T1, T2, and T3.
Signals Z1, Z2, and Z3 are input via 4, R16, and R18, respectively. In addition, each light emitting element LED1, LE
The power supply voltage VD is supplied to D2 and LED3 via the resistors R15, R17, and R19.

This operation will be described below. In addition,
Prior to using the light beam position measuring device 10, the switch SW is turned on, and the motor 44 is kept at a steady rotation.

(1) When the light beam 3 does not enter any of the light receiving elements PA to PD, the output of each of the light receiving elements PA to PD becomes L (low level), and the comparators G1, G2
Are both H (high level), the outputs of the comparators G3 and G4 are both L. Therefore, the transistor T4 is turned off, and the electromagnetic clutch 15 does not operate. On the other hand, also in the judgment unit 41, FIG.
, The signals A, B, C, and D are all L
Therefore, the signals Y1, Y2 and the signals Z1, Z2, Z
3 are all L. Therefore, in the buzzer section 42, the output of the low frequency oscillation circuit is fixed at L, and the OR element G
Since the output of 15 also becomes L, the high frequency oscillation circuit is also stopped, and the piezoelectric buzzer BZ does not generate sound. Further, in the display unit 43, since the signals Z1, Z2, and Z3 are L, each of the light emitting elements LED1 to LED3 is turned off.

(2) When the light beam 3 is incident only on the light receiving element PA, only the output of the light receiving element PA becomes H, and the others are L.
Becomes Since the outputs of the comparators G1 to G4 are the same as in the above (1), the electromagnetic clutch 15 does not operate.
In the judgment section 41, only the signal A is H and the signals B to D are L
Becomes Therefore, according to the truth table of FIG.
1 and the signal Z1 become H, and the buzzer 42
Since the low-frequency oscillation circuit operates and the high-frequency oscillation circuit operates according to the output level, the pitch of the piezoelectric buzzer BZ is determined by the oscillation frequency of the high-frequency oscillation circuit, and the intermittent cycle is determined by the oscillation frequency of the low-frequency oscillation circuit. Generates an intermittent sound.
On the other hand, in the display unit 43, only the signal Z1 becomes H, so that only the light emitting element LED1 is turned on.

(3) When the light beam 3 is incident on both the light receiving elements PA and PB, the outputs of the light receiving elements PA and PB become H and the others become L. Therefore, the output of the comparator G1 is inverted to L, and the output of the comparator G3 is inverted to H. However, since the output of the comparator G4 remains at L, the transistor T4 remains in the cut-off state, and the electromagnetic clutch 15 does not operate. In the judgment unit 41, the signals A and B are H, the signals C and D are L, and according to the truth table of FIG. 6, the signals Y1 and Z1 are H,
The operations of the buzzer section 42 and the display section 43 are the same as in the above (2).

(4) When the light beam 3 is incident only on the light receiving element PB, only the output of the light receiving element PB becomes H, and the others are L.
Becomes Therefore, the outputs of the comparators G1 to G4 are the same as in the above (3). On the other hand, in the determination unit 41, only the signal B is H and the others are L. According to the truth table of FIG. 6, the signals Y1 and Z1 are H, so that the operations of the buzzer unit 42 and the display unit 43 are as described above. Same as (2).

(5) When the light beam 3 enters both the light receiving elements PB and PC, the outputs of the light receiving elements PB and PC become H, the outputs of the comparators G1 and G2 both become L, and the outputs of the comparators G3 and G4. Both outputs become H.
Therefore, the transistor G4 becomes conductive, the electromagnetic clutch 15 operates, and marking is performed. on the other hand,
In the control unit 41, the signals B and C are H, the signals A and D are L, and according to the truth table of FIG. 6, both the signal Y2 and the signal Z2 are H.
The operation of the low frequency oscillation circuit stops, and only the high frequency oscillation circuit operates. Therefore, the piezoelectric buzzer BZ generates a continuous sound. On the other hand, in the display section 43, only the signal Z2 becomes H, so that only the light emitting element LED2 is turned on.

(6) When the light beam 3 is incident only on the light receiving element PC, only the output of the light receiving element PC becomes H and the others become L. Therefore, the output of the comparator G1 is H
Then, the output of the comparator G2 becomes L, then the output of the comparator G3 becomes L, and the output of the comparator G4 becomes H, so that the transistor T4 is turned off and the electromagnetic clutch 15 does not operate. In the judgment section 41, the signal C
According to the truth table of FIG. 6, since the signal Y1 and the signal Z3 are H, only the H is H and the others are L, the buzzer unit 42 generates an intermittent sound in the same manner as in (2) above. At the same time, only the light emitting element LED3 in the display section 43 is turned on.

(7) When the light beam enters both the light receiving elements PC and PD, the outputs of the light receiving elements PC and PD become H and the others become L. Therefore, the comparators G1 to G
4 is the same as the above (6). On the other hand, in the judgment unit 41, the signals C and D become H, the signals A and B become L,
According to the truth table of FIG. 6, the signals Y1 and Z3 become H,
The operations of the buzzer unit 42 and the display unit 43 are the same as in the above (6).

(8) When the light beam 3 is incident only on the light receiving element PD, the output of the light receiving element PD becomes H, and the others become L. Accordingly, the outputs of the comparators G1 and G2 both become H, and then the outputs of the comparators G3 and G4 both become L, so that the transistor T4 is turned off and the electromagnetic clutch 15 does not operate. On the other hand, the judgment unit 41
, The signal D becomes H and the others become L. According to the truth table of FIG. 6, the signal Y1 and the signal Z3 become H,
The operations of the buzzer unit 42 and the display unit 43 are the same as in the above (6).

FIG. 7 is a table showing the operation contents described above. When the light beam 3 is incident on any of the light receiving elements PA to PD, an intermittent sound is generated, a down arrow or an up arrow is displayed, and the light beam 3 is further transmitted to the light receiving elements PB and P.
A continuous sound is generated only when incident on both sides of C,
A display indicating the aiming state is performed. As described above, when the light beam 3 is incident on a predetermined light receiving element, it is possible to notify by sound or light and quickly mark the position of the light beam.

In the above embodiment, an example in which a motor, an electromagnetic clutch, an eccentric cam and the like are combined as the marking means has been described. However, a configuration in which the pen is reciprocally hit by an electromagnetic plunger may be used. An ink jet system that skips may be used.

[0033]

As described above, according to the present invention, the position of a light beam to be rotationally scanned can be detected with high accuracy, and the aiming state of the light beam can be clearly notified to a user. In addition, the position of the light beam can be quickly and accurately blackened on a test object such as a wall. Therefore, we eliminate artificial fluctuations and variations in the inking,
Labor saving and safety improvement of the blackout operation can be achieved. Further, in the marking means, by interposing a spring member between the reciprocating motion member and the pen holding member for holding the pen, unnecessary force does not act on the pen tip, and the tip of the pen can be prevented from being crushed. The reciprocating hit point of the pen can be easily realized by using a combination of an eccentric cam, a motor, a clutch, and a reduction gear as a mechanism for driving the moving member.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a use state of a light beam position measuring device 10 according to one embodiment of the present invention.

FIG. 2 is a partial plan view showing a part of a front panel 11 of the light beam position measuring device 10 shown in FIG.

FIG. 3 is a configuration diagram showing a marking unit 12 of the light beam position measuring device 10 of FIG.

FIG. 4 is a partial cross-sectional view showing an internal mechanism of the pen driving unit 20 shown in FIG.

FIG. 5 is a circuit diagram showing an electrical configuration of the light beam position measuring device 10 of FIG.

FIG. 6 is a chart showing truth values of a judgment unit 41 shown in FIG. 5;

FIG. 7 is a table showing operation contents of the light beam position measuring device 10 of FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 rotating laser device 2 tripod 3 light beam 3a spot 4 scanning line 5 wall 6 table 10 light beam position measuring device 11 front panel 12 marking unit 13 motor 14 output shaft 15 electromagnetic clutch 16, 18 rotation shaft 17 reduction unit 19 eccentric cam 20 Pen drive unit 21 Outer cylinder 22 Inner cylinder 23 Flat plate 24, 25 Coil spring 26 Pen gripping cylinder 27 Pen chuck 28 Pin 40 Light receiving unit 41 Judging unit 42 Buzzer unit 43 Display unit 44 Pen operating unit

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akira Kawasaki 1-2-2 Oshima, Koto-ku, Tokyo Shodennai Co., Ltd. (56) References JP-A-62-5122 (JP, A) 83914 (JP, U) Hira 4-23279 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01C 15/00

Claims (2)

(57) [Claims] 1. A light beam receiving means for receiving a light beam that scans the surface of a test object, and wherein the light beam receiving means receives a light beam based on a signal from the light beam receiving means. Notification means for notifying by sound or light, based on a signal from the light beam receiving means, when the light beam receiving means detects a light beam, the position of the light beam is inscribed on the surface of the test object. Marking means for attaching, a reciprocating movement member, a pen holding member for holding a pen, and a spring member interposed between the pen holding member and the movement member. A light beam position measuring device, characterized in that: 2. An eccentric cam for driving a moving member, a motor for rotating and driving the eccentric cam, a clutch interposed between the eccentric cam and the motor, and an interposition between the eccentric cam and the motor. 2. The light beam position measuring device according to claim 1, further comprising: a reduction gear.