JPH0720515U - Tilt detection device for pillar steel frame - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tilt detection device for a column steel frame that does not hinder the hanging operation of the column steel frame. [Structure] A target plate (14) attached downward to the top of a built-in pillar steel frame (12), and a laser oscillator (16) for oscillating laser light vertically upward.
And a television camera (18) for photographing the target plate, and a monitor means (20) electrically connected to the television camera. The target plate is a laser when the pillar steel frame is vertical. A mark (38) that is illuminated by light is provided. Instead of a laser oscillator, it includes a television camera placed in its position and oriented vertically upwards. The target plate and the lens surface of the television camera are provided with two marks (38, 52) that overlap each other when the pillar steel frame is vertical.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for detecting the inclination of a steel frame built to construct a column.

[0002]

[Prior art]

 Conventionally, as a pillar steel frame is built vertically, an automatic slinging device for suspending the pillar steel frame is attached with a target in which a large number of photodiodes are arranged, and a laser beam is emitted from below toward the target. The tilt of the column steel frame was detected by confirming the position of the photodiode that oscillated and received light (Japanese Patent Laid-Open No. 3-5576).

[0003]

[Problems to be solved by the device]

 By the way, the conventional inclination detecting device requires a coordinate display device for confirming the position of the light receiving photodiode in the target, and the coordinate display device and the target are electrically connected via a connection cord. It However, this connecting cord sometimes hinders the suspension operation of the column steel frame. An object of the present invention is to provide a tilt detecting device for a pillar steel frame that does not hinder the hanging operation of the pillar steel frame.

[0004]

[Means for Solving the Problems]

 The pillar steel tilt detecting device according to the present invention is provided with a target plate mounted downward on the top of the built-in pillar steel frame and a laser beam oscillating vertically upward toward the target plate. A laser oscillator, a television camera for photographing the target plate, and a monitor means electrically connected to the television camera. When the pillar plate is vertically attached to the target plate, A mark on which the laser light hits is provided.

Another pillar steel tilt detecting device according to the present invention is a target plate mounted downward on the top of a built-in pillar steel frame, and a vertical plate for photographing the target plate. A television camera directed upward and monitor means electrically connected to the television camera, and the pillar steel frame is vertically arranged on the target plate and the lens surface of the television camera, respectively. At some point there are two markers that overlap each other. The target plate may be composed of a plate member and a graph paper attached to the plate member.

[0006]

[Function and effect of device]

 According to the present invention, the position of the light receiving point, which is the collision point of the laser light on the target plate, is captured by the television camera and displayed on the monitor means, and the light receiving point and the mark on the target plate overlap each other. It is possible to confirm whether or not the steel column for tilting is present by checking whether or not there is a tilt. Further, according to the present invention, it is possible to check whether the mark on the target plate photographed by the television camera and displayed on the monitor means and the mark on the lens surface of the television camera overlap each other. , It is possible to confirm the presence or absence of inclination of the column steel frame.

[0007] In any case, there is nothing for connecting the television camera and the monitor means to the target plate, and therefore the suspension of the pillar steel frame that occurs when the connecting means is present. Operational obstacles can be eliminated. By configuring the target plate with the plate member and the graph paper, the marks on the target plate and the light receiving position from the scale of the graph paper, and the marks on the target plate and the television It is possible to easily detect the size and direction of deviation from the mark on the lens of the camera.

[0008]

【Example】

 Referring to FIG. 1, another pillar steel frame is mounted on the steel frame 10 to add to the pillar steel frame 10 previously built in a predetermined position by using a lifting machine such as a crane (not shown). Built in 12. INDUSTRIAL APPLICABILITY The present invention is used to confirm whether or not each column steel frame forming a column of a building is in a vertical state. Although the pillar steel frame shown has a rectangular cross-sectional shape, it may have another cross-sectional shape, such as a circle or an H-shape.

The tilt detecting device according to the present invention includes a target plate 14 attached to the top of a pillar steel frame 12, and a laser oscillator 16 for vertically oscillating a laser beam 15 toward a target plate 14. A television camera 18 for photographing the target plate 14 and a monitor means 20 electrically connected to the television camera 18. In this example, the television camera 18 and the monitor means 20 are fixed and integrated with each other.

The illustrated target plate 14 includes a rectangular plate member 22 made of metal, plastic, or the like, and a graph paper 24 (FIG. 2) attached to the plate member 22. The plate member 22 may have a shape other than the rectangular shape. Further, the graph paper 24 can be used as necessary.

The plate member 22 is positioned so that the graph paper 24 that defines one surface of the target plate 14 faces downward and the other surface faces upward, and is positioned at the same level as the upper end surface of the pillar steel frame 12. It is fixed to the side surface 12 a of the steel frame 12.

As shown in FIG. 2, the graph paper 24 has a pair of straight lines 26 and 28 which are orthogonal to each other. In the illustrated example, one straight line 26 of the graph paper 14 is on an extension of the bisector 30 of the two opposite sides of the rectangle defined by the upper end surface of the pillar steel frame 12. The other straight line 28 is separated by a distance L that exceeds the distance from the axis 32 of the pillar steel frame 12 or the bisector 34 of the other two sides of the rectangle which are opposite to each other to the side surface 12a of the pillar steel frame. It extends parallel to the bisector 34.

The laser oscillator 16 is installed below or near the bottom of the pillar steel frame 12 on the side surface 12 a side of the pillar steel frame 12 to which the target plate 14 is attached. When the laser oscillator 16 is installed, it is preferable that the laser beam 15 is applied at one point on the bisectors 36 of the two opposite sides of a rectangle defined by the lower end surface of the pillar steel frame 12 or the cross section of the pillar steel frame 10. It is set so as to travel on a vertical line extending vertically upward through a point at a distance L from the axis of the pillar steel frame 10.

According to this, when the laser light 15 traveling toward the target plate 14 hits the intersection 38 of the two straight lines 26, 28, which are the marks provided on the target plate 14, the pillar steel frame 12 is in the vertical state. Further, when the laser light 15 hits a point 40 other than the intersection 38, it can be known that the column steel frame 12 is in the inclined state.

The position of the point (light-receiving point) where the laser light 15 strikes the graph paper 24 of the target plate 14 is easily taken by pointing the television camera 18 at the graph paper 24 and photographing it, and displaying it on the monitor means 20. You can see and know (see Figure 3). Therefore, when the pillar steel frame 12 is tilted, the top of the pillar steel frame 12 is rocked so that the light receiving point 40 moves to the intersection 38 while observing the image of the monitor means 20, and the tilt is corrected. can do.

According to the pillar steel tilt detecting device of the present invention, since the light receiving position of the laser light 15 on the target plate 14 is not electrically detected, the target plate 14 is electrically connected to the conventional device. The connecting cords are not connected, and the connecting cords do not interfere with the hanging work of the column steel frame.

Instead of the illustrated example in which two vertical and horizontal lines are drawn, the graph paper 24 may be one in which a large number of vertical and horizontal lines are drawn. According to this, since there are many standards or criteria for determining the direction and amount of rocking for the inclination correction of the column steel 12, the inclination of the column steel 12 can be corrected more easily and in a shorter time. It can be carried out.

The vertical and horizontal lines can be directly drawn or carved on the lower surface of the plate member 22 without attaching the graph paper 24 to the plate member 22. The target plate composed only of the plate member 22 or the target plate composed of the plate member 22 and the graph paper 24 can be a part of the building without removing the target plate. Further, when the pillar steel frame is further extended and the target plate 14 is located at a high place, it is desirable to attach the telephoto lens 42 to the television camera 18 in order to obtain a large and clear image.

In another example of the present invention, as shown in FIG. 4, instead of the laser oscillator 16, a television camera 18 is installed at its installation location. The lens 44 of the television camera 18 is oriented vertically upward. This television camera 18 photographs the target plate 14 and the intersection 38 which is the mark, and projects both marks 38, 52 on the monitor means 20 which is separated from the television camera 18 and electrically connected. be able to.

In this example, the target plate 14 is spaced from the side surface 12a of the column steel frame 12, but the mark 38 provided on the target plate 14 is at the same position as in the above-mentioned example, that is, It is located at a position separated by a distance L from the bisectors 34 on both sides of the rectangle facing the side surface 12a. The illustrated target plate 14 is fixed to the wire end portion of the angle member 46 extending on the other bisector 30, and the lower surface thereof is on the same plane as the top surface of the pillar steel frame 12. The angle member 46 is fixed to the column steel frame 12 by a bolt / nut assembly (not shown) that penetrates a pair of brackets 48 connected to the angle member 46. In the illustrated example, a pair of short angle members 48 orthogonal to the angle member 46 are further fixed, and these angle members 48 also, like the angle member 46, are connected via the bracket 50 and the bolt-nut assembly. It is fixed to the column steel frame 12.

On the surface of the lens 44 of the television camera 18, for example, a mark 52 (FIG. 5) composed of an intersection of a pair of cross-shaped lines is drawn. The mark 52 is preferably located at a point on the traveling path of the laser light 15 in the above-described example. Therefore, when the mark 52 of the lens 44 overlaps the mark 38 on the target plate 14, the pillar steel frame 12 is in the vertical state, and when both the marks 38 and 52 do not overlap each other, the pillar steel frame 12 is You can know that you are in a tilted state.

Also in this example, the target plate 14 is not connected to the electrical connection cord in the conventional apparatus, and the connection cord does not hinder the suspension work of the column steel frame.

The above-mentioned television camera 18 may be either one using an image pickup tube or one using a solid-state image device such as CCD, MO S, CPD, CID.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an apparatus according to the present invention.

FIG. 2 is a bottom view of a target plate.

FIG. 3 is a plan view of a monitor screen.

FIG. 4 is a schematic perspective view of another device according to the present invention.

5 is a plan view of a monitor screen in the apparatus of FIG.

[Explanation of symbols]

 10, 12 Column steel frame 14 Target plate 16 Laser oscillator 18 Television camera 20 Monitor means 22 Plate member 24 Graph paper 38, 52 Mark

Claims (3)

[Scope of utility model registration request] 1. A target plate mounted downward on the top of a built-in pillar steel frame, a laser oscillator for vertically oscillating laser light, and a television for photographing the target plate. A camera and monitor means electrically connected to the television camera,
An inclination detecting device for a pillar steel frame, wherein the target plate is provided with a mark on which the laser beam is applied when the pillar steel frame is vertical. 2. A target plate attached downward to the top of the built-in pillar steel frame, a television camera directed vertically upward for photographing the target plate, and the television camera. A pillar including an electrically connected monitor, and the target plate and the lens surface of the television camera are provided with two marks that overlap each other when the pillar steel frame is vertical. Steel frame tilt detection device. 3. The apparatus according to claim 1, wherein the target plate includes a plate member and a graph paper attached to the plate member.