CN112683246B - Three-point support laser receiving target at paying-off hole - Google Patents
Three-point support laser receiving target at paying-off hole Download PDFInfo
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- CN112683246B CN112683246B CN202011409006.6A CN202011409006A CN112683246B CN 112683246 B CN112683246 B CN 112683246B CN 202011409006 A CN202011409006 A CN 202011409006A CN 112683246 B CN112683246 B CN 112683246B
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Abstract
The invention discloses a three-point support laser receiving target at a paying-off hole, wherein a cross line and a plurality of concentric circles with different diameters are drawn on the upper surface of a laser receiving plate, the circle centers of the concentric circles coincide with cross line intersection points, a cylindrical boss integrated with the laser receiving plate is arranged at the cross line intersection points, a cylindrical boss round mandrel coincides with the cross line intersection points, a supporting plate is connected with the rear end of the laser receiving plate, and three groups of supporting columns are arranged on the supporting plate. The metal support column is pressed down under the dead weight to grasp the concrete surface, the touch resistance of the laser receiving target is large, the laser receiving target is easy to be perceived by human touch, and after the laser receiving target is touched, the cone tip of the metal support column can leave a cone pit and a moving track on the concrete surface, so that the cone pit and the moving track can be clearly distinguished by naked eyes. According to the cone pits and the moving track, three cone points of the receiving target are directly restored corresponding to the concrete surface cone pits, and re-measurement from the datum point is not needed. The laser receiving target bullnose is provided with the convex column, so that a pencil is not required to be propped against the bullnose, and the laser receiving operation is convenient.
Description
Technical Field
The invention relates to the technical field of building measurement, in particular to a three-point support laser receiving target at a paying-off hole.
Background
When the axis of a high-rise building is guided vertically, a pay-off hole is reserved on a structural plate, focused laser is thrown upwards by adopting a laser plumb aligner which is centered downwards, and then a laser receiving target center arranged on the top layer of the structure coincides with a laser focus, so that the axis guiding measurement is realized.
The laser receiving target is generally square red transparent material, has a side length of 150-300 mm and a thickness of about 2mm, is light in weight, and is drawn with a white square grid line and a plurality of concentric circle lines with different diameters. The grid lines intersect with a plurality of concentric circles. The diagonal length of the paying-off hole is larger than the edge length of the laser receiving target. In order to prevent the laser receiving target from falling into the paying-off hole, two supporting strips are required to be placed above the paying-off hole, and then the laser receiving target is placed above the two supporting strips. The weight is placed on the laser receiving target to increase the friction force between the laser receiving target and the supporting bar, so as to prevent the position from being touched by mistake. The support bar material is generally steel bars, template strips, hacksaw blades and the like which are convenient to obtain in the field. Therefore, the laser receiving target cannot be directly used, and can be normally used only by means of other auxiliary materials, so that the actual operation is very inconvenient.
In general, floor paying-off operation is synchronously carried out with the basic operations of outer frames, reinforcing steel bars, woodworking operation and hydropower operation, and workers cannot walk without passing through paying-off holes, so that the workers are required to nurse laser receiving targets. In practice, after the laser receiving target is touched, whether the laser receiving target runs or not and the running distance cannot be directly observed. In order to ensure the axis to be accurate, the laser receiving target can only be re-checked under the condition that whether the laser receiving target is touched to the running position is not determined.
The laser receiving target requires some auxiliary material support and increased friction, and care is required to hold the pencil against the laser receiving target bulls-eye in order to be observed warp and weft. The pencil point is propped against the bulls-eye and is used as an aiming mark of the theodolite, and the vertical wires of the theodolite cross wires aim at the aiming mark.
Disclosure of Invention
The invention aims to make up the defects of the prior art, and provides a three-point support laser receiving target at a paying-off hole, which can solve the problems of light weight, unstable ground and easy position running caused by touch, can avoid a pencil as a rear view reference object of a theodolite, and can be found visually and restored to the original position after the position is run caused by touch.
The invention is realized by the following technical scheme:
the utility model provides a three-point support laser receiving target at unwrapping wire hole department, includes laser receiving plate, backup pad and support column the laser receiving plate upper surface draw and have the concentric circle of cross and a plurality of different diameters, the centre of a circle and the cross intersection coincidence of cross crossing department be provided with the integrative cylinder boss of laser receiving plate, cylinder boss round mandrel and the cross intersection coincidence of cross, backup pad and laser receiving plate rear end be connected the backup pad on install three sets of the support column. The cylindrical boss replacing pencil can be directly used as a rear view standard reference object of the theodolite. The backup pad is used for connecting the laser receiving plate, and laser receiving plate overhang state.
The radii of two adjacent concentric circles on the laser receiving plate differ by 10cm.
The support column include upper hand screw bolt and lower hand screw nut, upper hand screw bolt passes through the through-hole in the backup pad, lower extreme precession lower hand screw nut, lower hand screw nut's bottom be conical.
The diameters of the upper hand screw bolt and the lower hand screw nut are 10-15 mm, the height of the upper hand screw bolt is 10-15 mm, and the height of the lower hand screw nut is 20-25 mm.
An observation port is arranged in the middle of the supporting plate.
The center of the top surface of the cylindrical boss is provided with a white point.
The laser receiving plate is made of red transparent plastic materials.
The use method is that after the intersection point of the cross wire coincides with the laser focus, the top ends of the three support columns are pressed downwards with force, so that the bottom conical tip of the lower hand-screwed nut is pricked into the concrete surface, and the purpose is to prevent horizontal sliding. Even if the running position is carelessly touched, the conical tip can leave a moving track and a pricking pit on the surface of the concrete, and the conical tip can restore to the original position according to the moving track and the pricking pit. After the theodolite is erected, after the fact that the laser receiving target has no displacement trace is confirmed, a cylindrical boss at the center of the laser receiving target can be seen back.
The invention has the advantages that: according to the three-point support column for the laser receiving target, the metal support column is pressed down to grasp the concrete surface under the dead weight, the touch resistance of the laser receiving target is large and is easy to sense by touch of a person, after the laser receiving target is touched, the conical tip of the metal support column can leave a conical pit and a moving track on the concrete surface, and the conical tip can be clearly distinguished by naked eyes. According to the cone pits and the moving track, three cone points of the receiving target are directly restored corresponding to the concrete surface cone pits, and re-measurement from the datum point is not needed. The laser receiving target bullnose is provided with the convex column, so that a pencil is not required to be propped against the bullnose, and the laser receiving operation is convenient.
Drawings
FIG. 1 is a plan view of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a disassembled view of the present invention;
fig. 4 is a schematic diagram of the present invention.
Detailed Description
As shown in fig. 1, 2, 3 and 4, a three-point support laser receiving target at a pay-off hole comprises a laser receiving plate 1, a support plate 2 and a support column 3, wherein a cross line 11 and a plurality of concentric circles 12 with different diameters are drawn on the upper surface of the laser receiving plate 2, the circle center of each concentric circle 12 coincides with the intersection point of the cross line 11, a cylindrical boss 13 integrated with the laser receiving plate 1 is arranged at the intersection point of the cross line 11, the circular spindle of the cylindrical boss 13 coincides with the intersection point of the cross line 11, the support plate 2 is connected with the rear end of the laser receiving plate 1, and three groups of support columns 3 are arranged on the support plate 2. The cylinder boss 13 can be directly used as a rear view standard reference object of the theodolite instead of a pencil. The support plate 2 is used for connecting the laser receiving plate 1, and the laser receiving plate is in a overhanging state.
The radii of two adjacent concentric circles 12 on the laser receiving plate 2 differ by 10cm.
The support column 3 comprises an upper hand-screwed bolt 31 and a lower hand-screwed nut 32, the upper hand-screwed bolt 31 penetrates through an upper through hole 33 of the support plate 2, the lower end of the upper hand-screwed bolt is screwed into the lower hand-screwed nut 32, and the bottom end of the lower hand-screwed nut 32 is conical. The upper hand screw 31 and the lower hand screw 32 are made of metal materials such as iron and stainless steel with high density.
The diameters of the upper hand-screwed bolt 31 and the lower hand-screwed nut 32 are 10-15 mm, the height of the upper hand-screwed bolt 31 is 10-15 mm, the height of the lower hand-screwed nut 32 is 20-25 mm, and the dead weight can be increased by the larger size, so that the sliding resistance is increased.
The middle part of the supporting plate 2 is provided with an observation port 21, so that whether the concrete surface around the tip of the inverted cone at the bottom of the three hand-screwed nuts has running marks or not can be observed at the same time from all angles.
A white point is arranged at the center of the top surface of the cylindrical boss 13 so as to facilitate theodolite centering operation or theodolite sighting observation.
The laser receiving plate 1 is made of red transparent plastic material.
The cylindrical boss 13 can be used as a theodolite alignment mark instead of a pencil directly, and can also be used as a theodolite alignment mark.
The application steps of the invention are as follows:
after the laser plumb aligner is arranged, a three-point support laser receiving target at the paying-off hole is arranged above the paying-off hole 4 on the top layer, and three groups of support columns 3 on the support plate 2 are arranged on a concrete slab surface 5 outside the right-angle end of the paying-off hole 4 and are approximately symmetrical relative to the oblique symmetry axis of the paying-off hole 4. The laser receiving plate 1 is hung above the paying-off hole 4, the cylindrical boss 13 is adjusted to be coincident with the laser focus, and then the top ends of the three support columns 3 are pressed downwards by fingers with force, so that the inverted conical tip at the bottom of the lower hand screwing nut 32 is pricked into the concrete surface. Under the action of the dead weight of the support column 3, the whole sliding resistance is large.
After the concrete is poured, a person can go on measuring and paying off after the strength of the concrete surface layer reaches 1.2 MP/square, at the moment, the concrete strength is low, the inverted cone tip is easy to prick into the concrete slab surface, under the condition of being touched, a cone pit is left, and scratches are left on the concrete surface. Therefore, after the laser receiving board is touched to run, the laser receiving board is very easy to find through observation.
Typically, a high-rise building is provided with two pay-off holes, so that the second two laser receiving targets need to be positioned in sequence. After the first pay-off hole is positioned by the laser plumb gauge, the first laser receiving plate 1 can be positioned above the first laser receiving plate 1, and meanwhile, the laser plumb gauge is positioned to the second pay-off hole and positions the target of the second laser receiving plate. Before the theodolite at the first laser receiving plate is used for aiming the second laser receiving plate, whether the two laser receiving plates are in a cone pit and a moving track on the surface of the concrete slab is confirmed again.
And the second paying-off hole is positioned and pressed, and under the condition that the first laser receiving plate and the inverted cone of the second receiving plate are confirmed to have no moving track, the vertical wire of the longitude and latitude cross wire is directly aimed at the cylindrical boss. Before the first laser receiving board and the second laser receiving board are aligned, whether the first laser receiving board and the second laser receiving board have the running position is confirmed. Any one of the laser receiving plates finds a moving track and a cone pit, and three inverted cone tips are restored in one-to-one correspondence with the cone pit. And (5) after confirming no running position or restoring the original position theodolite to confirm centering, taking care.
After the theodolite is set, the theodolite cross wires are aimed at the cylindrical boss 12 in order to prevent horizontal sliding. Even if the running position is carelessly touched, the conical tip can leave a moving track and a pricking pit on the surface of the concrete, and the conical tip can restore to the original position according to the moving track and the pricking pit. After the theodolite is erected and no displacement trace of the laser receiving target is confirmed, a cylindrical boss at the center of the laser receiving target can be seen back,
the laser receiving target three-point support column is characterized in that the metal support column is pressed down to grasp the concrete surface under the dead weight, the laser receiving target has large touch resistance and is easy to be perceived by human touch. After the laser receiving target is touched, the cone tip of the metal support column can leave a cone pit and a moving track on the concrete surface, and the cone pit and the moving track can be clearly distinguished by naked eyes. According to the cone pits and the moving track, three cone points of the receiving target are directly restored corresponding to the concrete surface cone pits, and re-measurement from the datum point is not needed. The laser receiving target bullnose is provided with a convex column, and a pencil is not required to be propped against the target bullnose.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (1)
1. A three-point support laser receiving target at a paying-off hole is characterized in that: comprises a laser receiving plate, a supporting plate and supporting columns, wherein the upper surface of the laser receiving plate is painted with a cross line and a plurality of concentric circles with different diameters, the centers of the concentric circles coincide with the intersection point of the cross line, a cylindrical boss integrated with the laser receiving plate is arranged at the intersection point of the cross lines, a cylindrical boss round mandrel coincides with the intersection point of the cross lines, the supporting plate is connected with the rear end of the laser receiving plate, and three groups of supporting columns are arranged on the supporting plate;
the radii of two adjacent concentric circles on the laser receiving plate differ by 10cm;
the support column comprises an upper hand-screwed bolt and a lower hand-screwed nut, the upper hand-screwed bolt penetrates through the through hole in the support plate, the lower end of the upper hand-screwed bolt is screwed into the lower hand-screwed nut, and the bottom end of the lower hand-screwed nut is conical;
the diameters of the upper hand screw bolt and the lower hand screw nut are 10-15 mm, the height of the upper hand screw bolt is 10-15 mm, and the height of the lower hand screw nut is 20-25 mm;
an observation port is arranged in the middle of the supporting plate;
a white point is arranged at the center of the top surface of the cylindrical boss;
the laser receiving plate is made of red transparent plastic materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011409006.6A CN112683246B (en) | 2020-12-04 | 2020-12-04 | Three-point support laser receiving target at paying-off hole |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011409006.6A CN112683246B (en) | 2020-12-04 | 2020-12-04 | Three-point support laser receiving target at paying-off hole |
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| Publication Number | Publication Date |
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| CN112683246A CN112683246A (en) | 2021-04-20 |
| CN112683246B true CN112683246B (en) | 2023-05-02 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210108365U (en) * | 2019-07-10 | 2020-02-21 | 金丽华 | Laser marking instrument positioning support for building surveying and mapping |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204214445U (en) * | 2014-11-25 | 2015-03-18 | 中国建筑第七工程局有限公司 | A kind of laser unwrapping wire positioning auxiliaring tool |
| CN205027352U (en) * | 2015-10-20 | 2016-02-10 | 贾鹏 | A object positioning device for angular surveying |
| CN207894374U (en) * | 2018-03-19 | 2018-09-21 | 武汉大学 | A kind of high-rise building relative horizontal displacement on-Line Monitor Device based on CMOS |
| CN209927137U (en) * | 2019-06-17 | 2020-01-10 | 王剑 | Adjustable surveying and mapping support for land surveying and mapping |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210108365U (en) * | 2019-07-10 | 2020-02-21 | 金丽华 | Laser marking instrument positioning support for building surveying and mapping |
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