JPH07270164A - Suspension weight body - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of a target point and the movement work thereof by a constitution wherein a semiconductor laser device is built in the title device so that when suspended, the laser device emits a visible laser light downwardly in the vertical direction. CONSTITUTION:A semiconductor laser device is disposed in a space between a cap section 21 and a weight section 23. When an end of a suspension string 25 connected to a top section 22 of a suspension weight body 2 is attached to a target point of an upper structural member, the suspension weight body 2 is placed in a position below the target point in the vertical direction due to the gravity thereof and a visible laser light is emitted in the vertical direction from a lower opening 26 of the weight section 23. As a result, a spot on a floor is an under point in the vertical direction correspondingly moved from the target point of the upper structural member. When the suspension weight body 2 is separated from the floor, the light is clearly emitted on the floor so that it is possible to easily and accurately execute the movement work of the target point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plumb bob which has a function of emitting a visible laser beam and is used for determining a vertical direction at a construction site or a survey site.

[0002]

2. Description of the Related Art When rectifying various types of equipment or erection work and deciding the installation position of surveying equipment, a plumb bob with an inverted conical weight attached to the lower end of the thread is hung vertically. Have decided.

[0003]

However, as shown in FIG. 4, the conventional plumb bob 1 is used to move the gauge point S on the floor surface 9 to the vertically upper structure. In the work, when the sharp lower end 11 of the plumb bob 1 is matched with the reference point S, the point E deviated from the reference point S is determined by the position of the eyes of the operator who holds the tip of the hanging thread 12. May be recognized as a control point.

In order to prevent such an error, even if the operator who holds the tip of the hanging thread 12 can see the gauge point S, such a work is performed by a pair of people. That is, one person is instructed to move the hanging thread 12 up and down and front and back and left and right so that the lower end 11 of the plumb bob weight 1 is close to the gauge point S near the floor surface, and the other person moves upward based on the instruction. The tip of the hanging thread is moved by, and a mark is attached to the structure above the gauge point S in the vertical direction. Similarly, the tip of the hanging thread 12 is aligned with the reference point of the upper structure, and the plumb bob 1
Two people also perform the marking of the lower end 11 position on the floor surface 9.

During such work, since the lower end of the plumb bob body 1 is sharp and has been subjected to quenching treatment, the hanging thread 12 may be cut off, and the plumb bob weight may be broken. When the body 1 falls, it causes a serious accident both physically and physically. Therefore, there are construction sites that limit the dangerous usage of the plumb bob 1 as described above.

If the tip of the hanging thread 12 is moved abruptly during such work, the plumb bob 1 may shake greatly and damage the wall or the glass window. Further, when the work site is dark, lighting is required to confirm the position of the lower end 11 of the plumb bob 1 and depending on the position of the illumination, the shadow of the plumb bob may be shaded on the floor surface. Therefore, it is difficult to match or move the marking points.

[0007]

The plumb bob weight of the present invention has a built-in semiconductor laser device including a light source member and a power source member, and emits a visible laser beam vertically downward during suspension. , The problem can be solved. A cushion material may be attached to the outer surface of the plumb bob.

[0008]

The plumb bob of the present invention is constructed as described above, and the visible laser light emitted vertically downward from the plumb bob has a high directivity and a large depth of focus. Even if the swing weight and the floor surface are separated,
Irradiate the floor clearly. Therefore, the work of aligning the irradiated spot with the moving body of the plumb bob and moving the moving point is extremely easy and can be performed accurately.

When a cushion material is attached to the outer surface of the plumb bob, even if the hanging thread is cut,
Even if the plumb bob is shaken greatly and comes into contact with a wall surface or glass without causing fatal damage to a human body or an object, they are less likely to be damaged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an essential part of an example of a plumb bob 2 of the present invention. The plumb bob 2 includes a conical lid portion 21 and a neck portion 2 screwed into an upper end of the lid portion 21.
2, a weight portion 23 connected to the lower edge of the lid portion 21, and a light source member 31 and a power source member 32 of the semiconductor laser device mounted in the space between the lid portion 21 and the weight portion 23.

A hanging thread 25 is connected to the neck portion 22 in a state in which the length can be adjusted. At the bottom of the weight 23,
When the opening 26 is perforated and the plumb bob weight 2 is suspended by the hanging thread 25, the center of the opening 26 is positioned on the extension line of the hanging thread 25, that is, in the vertical direction. ing. Light source member 3 used in the present invention
1 is small size, high reliability, low power consumption,
A visible light semiconductor laser with excellent mass productivity is adopted.

Since the visible light semiconductor laser is used as the light source member 31 as described above, a primary battery or a secondary battery can be used as the power source member 32. The output of the semiconductor laser used is about 1 to 10 mW, and the actual output is 2
Since it is less than mW, it does not affect the human body in normal use. The emitted beam diameter is 0.5
The depth of focus is adjusted to 1 to 2 m at a depth of 3.0 mm. The emitting direction of the beam is adjusted so as to match the extension line of the hanging thread 25 on which the plumb bob weight 2 is hung, that is, the vertical direction.

On the outer surface of the plumb bob weight 2 of the above embodiment,
For example, as shown in FIG. 2, a cushion material 28 can be attached, and an opening 29 is provided for the emitted laser light. The cushion material 28 is formed of a single layer or a composite layer of solid or foamed material such as rubber or soft synthetic resin.

Further, as shown in FIG. 3, a conical cap 30 made of a similar material is detachably attached to the lower portion of the cushion member 28 of the plumb bob weight body 3 of FIG. In the plumb bob 4, the opening 29 for the emitted laser beam can be shielded, so that dust can be prevented from entering when not in use and the battery of the power supply member 32 is exhausted. However, it can be used similarly to the conventional plumb bob body 1. In this case cap 3
The lower end of 0, when the plumb bob weight 4 is suspended,
It is on an extension of the hanging thread 25.

The plumb bob weights 2, 3 and 4 of the present invention are
When the tip end of the hanging thread 25 connected to the neck portion 22 is aligned with the gauge point of the upper structure, it is located below the gauge point in the vertical direction by gravity and the lower opening portion 2 of the weight portion 23 is located.
Visible laser light is emitted from 6 in the vertical direction. Therefore, the spot on the floor becomes the vertically lower point moved from the gauge mark of the upper structure.

When the spot of the visible laser light emitted from the plumb bob weights 2, 3 and 4 is aligned with the reference point on the floor surface, the tip of the hanging thread 25 is located on the floor surface of the upper structure. It will be the point vertically above that was moved from the gauge point. Since the center of gravity of the plumb bob weight body of the present invention is located downward by the lower weight portion 23, the plumb bob weight immediately stands still when it is hung, so that the work of transferring the gauge marks can be performed quickly. You can

[0017]

Since the plumb bob weight of the present invention is constructed as described above, it exerts the following effects.
The visible laser light of the semiconductor emitted vertically downward from the plumb bob weight has a high directivity and can increase the depth of focus. Therefore, even if the plumb bob weight and the floor surface are separated from each other. Since the floor surface is clearly illuminated, it is extremely easy to move the floor mark to the upper structure or to move the upper mark to the floor. Can be carried out.

If a cushioning material is attached to the outer surface of the plumb bob weight, the plumb bob weight can be made large without causing fatal damage to a human body or an object even if the hanging thread is broken. Even if it shakes and contacts the wall surface or glass, it is less likely to be damaged. The cushion material protects the semiconductor laser device inside the plumb bob from impact.

Further, by locating the center of gravity of the plumb bob body below it, the swing of the bobbin itself is prevented. Exercise is reduced and work can be performed quickly. Although the plumb bob weight of the present invention is a simple device, it can easily perform the same operation as a vertical device for determining a vertical line without using a tripod and without adjusting the level.

[Brief description of drawings]

FIG. 1 illustrates an example of a plumb bob weight of the present invention,
FIG.

FIG. 2 is a sectional view of an essential part of a plumb bob weight, showing another embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part of a plumb bob weight according to still another embodiment of the present invention.

FIG. 4 is a front view showing a conventional plumb bob body.

[Explanation of symbols]

 2 Down swing weight body 3 Down swing weight body 4 Down swing weight body 28 Cushion material 31 Light source member 32 Power supply member

Claims (2)

[Claims] 1. A plumb bob body which incorporates a semiconductor laser device including a light source member and a power source member and emits visible laser light vertically downward during suspension. 2. The plumb bob weight according to claim 1, wherein a cushion material is attached to the outer surface.