JP2002188919A - Horizontal vertical collimator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly damp shaking of a floodlight projector supporter in a floodlight type horizontal, vertical collimator used in a construction spot or the like. SOLUTION: A magnet 7 is fixed to the lower end of the supporter 1 freely supported with two shafts, a concave spherical surface 8 made from a magnetic plate is installed so as to face the magnet, and shaking of the supporter is damped by effects of magnetic attraction force, magnetic hysteresis, eddy current, or the like acting to between the magnet and the concave spherical surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collimating device used for detecting horizontal and vertical positions at a construction site, etc., and relates to a collimating device.

[0002]

2. Description of the Related Art The above-mentioned light-projection type horizontal / vertical collimation apparatus has two components.
A structure that holds a horizontal indicator floodlight that projects a horizontal thin line and a vertical indicator floodlight that projects a vertical thin line on a support that is supported by a shaft and that can swing freely, and is horizontally and vertically mounted on pillars and walls of a building. A vertical line is projected by inspecting the vertical direction of the pillar, or horizontal and vertical ruled lines are drawn on the wall surface. However, this type of conventional device has the following problems. First, the support is not easily attenuated, and a stopper for manually stopping the movement is provided. However, since the operation itself causes the support to oscillate, the operation requires skill, and Work efficiency was reduced. In order to improve this point, there is one that employs an eddy current attenuating means using a magnet and a conductor. And the sway of the support is difficult to stop. Second, the swing range of the support is limited, and a part of the optical path of the projector may be kicked somewhere in the device, which may hinder the projection of the fine line. If the device is installed at an excessively inclined angle, the device may not operate properly. If the device is too tilted,
Since the support cannot swing, there is a possibility that the horizontal and vertical may be set incorrectly on the assumption that the swing of the support has subsided. In order to prevent this, it is necessary to provide a means to warn that the inclination of the device has exceeded the limit.Conventionally, as a means of rolling the metal ball on a concave surface, a conductor is arranged in a ring around the circumference, A device has been proposed in which a circuit is closed and a warning is issued when a ball comes into contact with a conductor ring due to the inclination of the device. However, such means using electrical contact is liable to cause poor contact and has low operation reliability.

[0003]

SUMMARY OF THE INVENTION The present invention intends to provide a horizontal and vertical collimation device of the above-mentioned light projecting type which solves the two problems described above and is easier to use. Things.

[0004]

Means for Solving the Problems Horizontal and vertical collimation of a type in which a vertical indicator floodlight and a horizontal indicator floodlight are mounted on a support that is swingably supported on two axes and is kept vertical by a weight. In the device, a magnet is attached to the lower end of the support as a means for attenuating the swing of the support, and a concave spherical magnetic plate is fixed to the apparatus body side of the collimator in opposition to the magnet. As means for warning that the installation state of the apparatus main body is tilted beyond the limit, a non-contact detecting means is provided between the x-axis support of the support and the support, and the y-axis support is similarly provided. A contact detection means is also provided between the body and the support, and a warning is issued that the inclination of the apparatus main body has exceeded the limit due to the signal being detected or not being detected by the respective non-contact detection means. So that the top of the support Attached bubbles type visual level gauge indicating the vertical.

[0005] The first feature of the above structure is a means for attenuating the swing of the support, which utilizes the attraction force between the magnet and the magnetic material. In the present invention, since the magnetic plate having the concave spherical surface faces the magnet below the support, even if the support is shaken, the distance between the magnet and the concave spherical surface remains unchanged or hardly changes. Therefore, no force is applied to the magnet in the tangential direction due to fluctuation, and it seems that there is no damping effect at first glance. It is big. For this reason, when the magnet moves, the opposite polarity magnetization remains on the magnetic plate at the mark where the magnet passes, and this magnetization causes a force between the magnet and the magnetic plate to stop the movement of the magnet. Although it is considered to work, details of this damping action will be described in (0010). Of course, in this case, the eddy current generated in the magnetic body plate is also effective in damping, and both effects provide a larger damping effect than simply using the eddy current.

The second feature of the present invention is a warning means for an excessive inclination at the time of installation of the device. The feature is that it is a non-contact type and that a visual level is used in combination. .
It is a level first, but since it is mounted on the top of the support, it usually indicates horizontal, and when this does not indicate horizontal, there is something wrong with the support of the support. . When one of the non-contact type warning means does not operate, the horizontal level is not shown. In other words, the level is for double confirmation and also indicates a trouble in the support of the support.
For example, when the x-axis of the support is fixed to the support and the main body side of the device is a bearing, the non-contact type warning unit fixes the sector on the x-axis and sandwiches the sector on the bearing side. A structure with a photocoupler, which is normal when no photoelectric output is output and issues a warning when a photoelectric output is output.However, since it is completely non-contact, it is more reliable than the conventional example. Sex is extremely high.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a support, on which a horizontal indicator floodlight 2 for projecting a horizontal line and a vertical indicator floodlight 3 for projecting a vertical line are mounted. This is called a support because it supports these projectors. The support 1 is held on the apparatus main body B by a gimbal. The gimbal has a structure in which a ring 5 supported by a y-axis 4 supports the support 1 by an x-axis 6. The support 1 is supported biaxially by this gimbal and always maintains a vertical position. A magnet 7 is attached to the lower end of the support 1 with one pole down, and a short distance from a concave spherical magnetic plate (iron plate) 8 having a center of curvature slightly above the center of swing of the support 1. Are opposed to each other. Support 1
A bubble level 9 is attached to the top of the box, and it is possible to visually check whether the support 1 is vertical or whether somewhere is caught by something and forced into a non-vertical state. I can do it.

As shown in FIG. 1B, the y-axis 4 is fixed to a gimbal ring 5 and is supported by a bearing on the main body side. A sector 10 having a sector shape is attached to the shaft 4, and a photocoupler 11 is held by a bearing on the main body side with the sector 10 interposed therebetween. When the installation of the main body B is inclined beyond a predetermined limit, the sector 10 escapes from between the photocouplers 11 and
A light receiving signal is emitted from the photocoupler 11 to warn that the inclination of the main body installation has exceeded the limit. Similarly, the x-axis 6 is fixed to the support 1 and is supported by a bearing provided on the gimbal ring 5. The sector 12 is fixed to the x-axis 6, and the photocoupler 13 is attached to the gimbal ring 5.

In the above example, a photoelectric means is used as the non-contact means for detecting that the inclination of the installation of the main body B exceeds the limit, but a magnetic means may be used. FIG. 2 shows an example in which the y-axis 4 and the x-axis 6 have annular magnets 10 'and 12'.
Is fitted. These annular magnets are magnetized in the circumferential direction, and the lines of magnetic force do not go out, but one part of the ring is cut off, and the lines of magnetic force leak out from there. The magnetic sensors 11 'and 13' attached to the main body and the gimbal ring 5 detect the leaked magnetic field lines. Usually, this detection signal is 0, and when the main body is tilted, the magnetic detection signal becomes a positive or negative value. Therefore, it is detected by signal processing that the magnetic detection signal has exceeded the positive or negative peak, and it is detected that the inclination has exceeded the limit.

As means for rapidly attenuating the oscillation of the support 1, (0007) has shown a configuration comprising a magnet 7 attached to the lower end of the support 1 and a magnetic plate 8 having a concave spherical surface below the magnet 7. The oscillation damping effect of this configuration will be described. In (0005), one of the causes of this effect is as follows.
Although the description has been made that the magnetic hysteresis of the magnetic plate 8 causes a delay in magnetization to prevent the movement of the magnet 7, the following is considered as another cause of action in the case of the illustrated example. Can be Since the magnetic plate (iron plate) 8 has a center of curvature above the center of oscillation of the support 1, the distance between the magnet 7 and the magnetic plate 8 is minimum when the magnet 7 is above the center of the magnetic plate 8. That is, when the main body B is placed horizontally,
The distance between the magnet and the magnetic plate is minimal. Since the magnet 7 is pulled in the direction in which the distance between the magnet 7 and the magnetic plate 8 is minimized,
When the apparatus main body is placed horizontally, the support is sucked so as to be vertical, so that the movement stops almost instantaneously. Actually, since the main body of the apparatus is installed so as to be substantially horizontal, it is considered that the effect that this magnet is pulled toward the narrower interval greatly affects the damping of the oscillation of the support. If the main body is slightly tilted, this action is pulled to the position where the gap with the magnetic plate is the narrowest, whereas the position of the magnet when the support is vertical is slightly shifted, so the support is The body should tilt slightly, but if the weight of the support is appropriately large, the effect of gravity will prevail and this tilt can be neglected in practice.

In the above example, if the magnetic plate 8 having a concave spherical surface is made of a copper-clad iron plate in which copper and iron are bonded together and the copper side is oriented upward, the conductivity is higher than in the case of a simple iron plate, and the lower side is iron. Therefore, the damping action due to the eddy current is enhanced in addition to the increase of the magnetic force lines penetrating through the copper, and the damping action is enhanced by overlapping with the damping action due to the hysteresis of iron. In this case, by setting the center of curvature of the concave spherical surface 8 to coincide with the support and the center of swing, the above-described operation depends on the fact that the magnet is drawn to the narrowest portion between the magnet and the concave spherical surface. The damping can be obtained without having to do so, and the vertical accuracy of the support is very good.

FIG. 3 shows another configuration for attenuating the swing of the support 1. Below the support 1, a concave spherical surface 8 'concentric with the swing center of the support is arranged. This concave spherical surface is a non-magnetic material, and has a magnetic material ball 20 on its lower surface, which is attracted by the magnet 7 at the lower end of the support 1 and adheres to the lower surface of the concave spherical surface 8 '.
As the support 1 oscillates, the lower surface of the concave spherical surface 8 'is rolled by the magnet 7, and the sway of the support 1 is attenuated by the friction of the rolling at this time. The magnetic sphere 20 may be made so heavy that the magnet 7 at the lower end of the support cannot suck it up, so that the upper surface of the concave spherical surface 8 'can be rolled. In this case, the concave spherical surface 8 'is preferably made of a magnetic material.
Further, in this case, the concave spherical surface 8 'may be permanent magnetized perpendicular to the plate surface.

[0013]

According to the present invention, since the sway of the support is attenuated quickly, it is easy to handle and the work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall structure of an embodiment of the present invention.

FIG. 2 is a perspective view showing another example of a means for warning a tilt limit.

FIG. 3 is a longitudinal sectional view showing another example of the damping means.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 support 2 horizontal indicating floodlight 3 vertical indicating floodlight 4 y-axis 5 ring 6 x-axis 7 magnet 8 concave spherical magnetic plate 9 level 10 sector 11 photocoupler 20 magnetic ball B main body

Claims (1)

[Claims] 1. A horizontal and vertical collimator of a type in which a vertical indicator floodlight and a horizontal indicator floodlight are mounted on a support which is supported to be swingable about two axes and is kept vertical by a weight. As means for attenuating body swing, a magnet is attached to the lower end of the support, and a concave spherical magnetic plate is fixed to the apparatus body side of the collimator in opposition to the magnet,
As means for warning that the installation state of the apparatus main body is tilted beyond the limit, a non-contact detecting means is provided between the x-axis support of the support and the support, and the y-axis support is similarly provided. Non-contact detection means is also provided between the sensor and the support, and a warning is issued when the inclination of the apparatus main body exceeds the limit due to the detection or non-detection of a signal by the respective non-contact detection means. A horizontal and vertical collimation device, wherein a bubble-type visual level indicating that the support is vertical is attached to the top of the support.