CN110145990A - A kind of free-falling formula aciculiform calibrator for building - Google Patents
A kind of free-falling formula aciculiform calibrator for building Download PDFInfo
- Publication number
- CN110145990A CN110145990A CN201910474262.4A CN201910474262A CN110145990A CN 110145990 A CN110145990 A CN 110145990A CN 201910474262 A CN201910474262 A CN 201910474262A CN 110145990 A CN110145990 A CN 110145990A
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- free
- square groove
- calibrator
- aciculiform
- plate
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- 238000005259 measurement Methods 0.000 claims abstract description 49
- 238000001514 detection method Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000638 stimulation Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The present invention relates to building detection technique fields, refer in particular to a kind of free-falling formula aciculiform calibrator for building, including bottom plate and pressing plate, it is flexibly connected between the pressing plate and the bottom plate by connecting bracket, and positioning screw cap is threaded on the surface of connecting bracket, the centre of the pressing plate offers a measured hole, 6-8 group square groove is offered on the inside of the measured hole, the two sides of the square groove inner wall offer a sliding slot, and the interior of the measured hole is provided with measuring thickness device, and the magnetic-type support device of auxiliary is provided in the square groove.The setting that the present invention passes through measuring thickness device and the magnetic-type support device of auxiliary, better than the prior art, it ensure that measurement needle is inserted into testee when free-falling, it does not need to be used with hand-held, measurement needle ontology will not be damaged, the precision of its measurement will not be influenced, convenient for the use of building detection.
Description
Technical field
The present invention relates to building detection technique fields, refer in particular to a kind of free-falling formula aciculiform calibrator for building.
Background technique
Currently, detecting bituminous highway road surface in building trade, need to be examined by its calibrator
It surveys.Moreover, it is inserted into testee by will test needle, by detecting the insertion depth of needle, to calculate measurement object
Thickness.
And in comparison patent, application No. is a kind of aciculiform calibrator of CN201720364893.7, technical solution is wanted
The reading block and the measurement being fixed on reading block that point bracket, the ruler body being vertically arranged on bracket, sliding are connected on ruler body
Although there are some full disadvantages can guarantee vertical aspect in needle, such as: need it is hand-held to measurement needle carry out using,
Although can measure, manual setting is easily damaged measurement needle ontology, and also will affect the precision of its measurement manually, no
Convenient for the use to building detection.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, it the present invention provides a kind of free-falling formula aciculiform calibrator for building, solves
Building detection carries out using although can measure, manual setting is easily damaged measurement needle measurement needle with calibrator is hand-held
Ontology, and also will affect the precision of its measurement manually, the problem of being not easy to the use detected is built.
(2) technical solution
To achieve the above object, the invention provides the following technical scheme: a kind of free-falling formula aciculiform calibrator for building,
Including bottom plate and pressing plate, it is flexibly connected between the pressing plate and the bottom plate by connecting bracket, and the surface of connecting bracket
On be threaded with positioning screw cap, the centre of the pressing plate offers a measured hole, offers 6-8 on the inside of the measured hole
Group square groove, the two sides of the square groove inner wall offer a sliding slot, and the interior of the measured hole is provided with measuring thickness device, described
It is provided with the magnetic-type support device of auxiliary in square groove, by the setting of measuring thickness device and the magnetic-type support device of auxiliary, is better than
The prior art ensure that measurement needle is inserted into testee when free-falling, does not need to be used with hand-held, will not damage
Bad measurement needle ontology, will not influence the precision of its measurement, convenient for the use of building detection.
The measuring thickness device includes the mounting base being fixedly connected on pressing plate, and the centre at the top of the mounting base opens up
There is the through-hole being connected to measured hole, the flank threads of the mounting base are connected with positioning bolt, or else positioning bolt can carry out
It is positioned when use, and one end of the positioning bolt is pierced into through-hole, is fixedly connected at the top of the mounting base
Ruler plate is provided with graduation mark on ruler plate, reading plate is connected with above the ruler plate, and be fixedly connected below reading plate
There is measurement needle, the bottom of the measurement needle through measured hole and extends downwardly, in measurement needle insertion testee, meanwhile, pass through
The movement of reading plate is observed that the scale on ruler plate, and can facilitate and carry out detecting its thickness, does not need hand-held setting, and
And its precision can be improved, it is convenient that building is detected.
Further, the magnetic-type support device of auxiliary includes two groups of connecting rods, described connecting rod one end and sliding slot far from survey
The side of thick device connects, and its other side is fixedly connected by magnet block A with the other end of the sliding slot, the table of the connecting rod
It is connected with irony sliding block on face, and is fixedly connected with fixed link between every group of two irony sliding blocks, it is described solid
The outer surface of fixed pole is connected with eccentric wheel, and the eccentric wheel leads to far from magnet block B is fixedly connected on the surface of fixed link
It crosses setting and assists magnetic-type support device, when measuring needle free-falling, and contacted at eccentric wheel, and eccentric wheel is existed
While the rotation of fixed link, can the irony sliding block in fixed link can be moved outward by connecting rod, without limitation on measurement needle
Movement, and during not using, conplane two eccentric wheels keep horizontal, and the magnetic that two stimulations are opposite
Mutual magnetic between iron block B, irony sliding block and magnet block A magnetic wait the second task, it is ensured that its precision measured,
Facilitate the use of its building detection.
Further, between two of the same level magnet block B magnetic pole on the contrary, can attract each other.
Further, distance of two of the same level magnet block B between after complete magnetic, which is less than, surveys
The diameter of metering pin so that eccentric wheel of measurement needle next time in the two sides free-falling Shi Keyu contacts, can not only protection needle, also
The precision of its measurement can be improved.
Further, the top of square groove inner wall, and the bottom of the eccentric wheel and square groove inner wall is arranged in the sliding slot
Portion is equipped with spacing, guarantee eccentric wheel in the rotation will not with square groove friction or block, convenient for prolonged use and
Operation.
Further, square groove is provided on the surface of the pressing plate, and the inner wall of square groove is equipped with observation window, can be convenient for
Observation.
Further, the bottom of the eccentric wheel is also fixedly connected with an elastic element, and the elastic element can be to stretch
Contracting spring, and the other end of the elastic element is connect with the bottom of square groove inner wall, the setting of elastic element, so that measurement needle
Have the function of Auxiliary support when falling, is restored back to bullet when will not allow and measure the right whereabouts of spicula, and not use, it is extensive
Position is restored, convenient for the use to building detection.
Working principle: in use, the object that user detects needs is put on bottom plate, and pressing plate pushes, and passes through
Positioning screw cap is fixed, and measures needle and and contacts at eccentric wheel when free-falling, and makes eccentric wheel in fixed link
Rotation while, can the irony sliding block in fixed link can be moved outward by connecting rod, without limitation on the movement of measurement needle,
And elastic element has the function of Auxiliary support, meanwhile, the scale on ruler plate is observed that by the movement of reading plate, and
And can facilitate and carry out detecting its thickness, hand-held setting is not needed, and its precision can be improved, it is convenient that building is detected；
When not detecting, conplane two eccentric wheels keep horizontal, and the magnet block B that two stimulations are opposite
Between mutual magnetic, irony sliding block and magnet block A magnetic wait the second task, it is ensured that its precision measured, and not
The use of time restores rebound, sets back, convenient for the use to building detection.
Three beneficial effects
According to obtained by above-mentioned technical proposal the beneficial effects of the present invention are:
1, the present invention is better than the prior art, passes through freedom by the setting of measuring thickness device and the magnetic-type support device of auxiliary
The mode to fall with magnetic ensure that measurement needle is inserted into testee when free-falling, not need to be made with hand-held
With, measurement needle ontology will not be damaged, the precision of its measurement will not be influenced, the use detected convenient for building.
2, in present invention measurement needle insertion testee, meanwhile, it is observed that on ruler plate by the movement of reading plate
Scale, and can facilitate and carry out detecting its thickness does not need hand-held setting, and can improve its precision, it is convenient to build into
Row detection.
3, the present invention assists magnetic-type support device by setting, when measuring needle free-falling, and connects at eccentric wheel
Touching, and makes eccentric wheel while the rotation of fixed link, can irony sliding block in fixed link can be by connecting rod outward
Mobile, without limitation on the movement of measurement needle, and during not using, conplane two eccentric wheels keep horizontal,
And mutual magnetic, irony sliding block and magnet block A magnetic between the opposite magnet block B of two stimulations, wait the second task, can
The precision for guaranteeing its measurement facilitates the use of its building detection.
4, distance of the two magnet block B of same level of the present invention between after complete magnetic is less than the straight of measurement needle
Diameter so that eccentric wheel of measurement needle next time in the two sides free-falling Shi Keyu contacts, can not only protection needle, can also improve it
The precision of measurement.
5, the present invention guarantee eccentric wheel in the rotation will not with square groove friction or block, convenient for making for a long time
With and operation.
6, the setting of elastic element of the present invention, so that measurement needle has the function of Auxiliary support, Bu Huirang when falling
It is restored back to bullet when measuring the right whereabouts of spicula, and do not use, is set back, convenient for the use to building detection.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to required in embodiment technical description
The attached drawing wanted is briefly described.
Fig. 1 is schematic diagram of the three-dimensional structure；
Fig. 2 is left side structure schematic diagram of the present invention；
Fig. 3 is the schematic diagram of the section structure of A-A in Fig. 2；
Fig. 4 is the enlarged drawing in Fig. 3 at A；
Fig. 5 is the schematic diagram that eccentric wheel is removed in Fig. 4.
In figure: 1 bottom plate, 2 pressing plates, 3 brackets, 4 measured holes, 5 square grooves, 6 sliding slots, 7 measuring thickness devices, 701 mounting bases, 702
Through-hole, 703 positioning bolts, 704 ruler plates, 705 graduation marks, 706 reading plates, 707 measurement needles, the 8 magnetic-type support devices of auxiliary,
It is 801 connecting rods, 802 magnet block A, 803 irony sliding blocks, 804 fixed links, 805 eccentric wheels, 806 magnet Bs, 807 elastic elements, 9 rectangular
Slot, 10 observation windows, 11 positioning screw caps.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one:
As shown in Figs. 1-5, the present invention provides a kind of technical solution: a kind of free-falling formula aciculiform calibrator for building, packet
Bottom plate 1 and pressing plate 2 are included, is flexibly connected between pressing plate 2 and bottom plate 1 by connecting bracket 3, and spiral shell on the surface of connecting bracket 3
Line is connected with positioning screw cap 11, and the centre of pressing plate 2 offers a measured hole 4, and it is rectangular that the inside of measured hole 4 offers 6-8 group
Slot 5, the two sides of 5 inner wall of square groove offer a sliding slot 6, and the interior of measured hole 4 is provided with measuring thickness device 7, setting in square groove 5
There is the magnetic-type support device 8 of auxiliary, by the setting of measuring thickness device 7 and the magnetic-type support device 8 of auxiliary, be better than the prior art,
It ensure that 707 measurement needles are inserted into testee when free-falling, do not need to be used with hand-held, measurement will not be damaged
707 ontology of needle will not influence the precision of its measurement, convenient for the use of building detection, be provided with square groove on the surface of pressing plate 2
9, and the inner wall of square groove 9 is equipped with observation window 10, it can be convenient for observation.
Measuring thickness device 7 includes the mounting base 701 being fixedly connected on pressing plate 2, and the centre at 701 top of mounting base opens up
There is a through-hole 702 being connected to measured hole 4, the flank threads of mounting base 701 are connected with positioning bolt 703, and positioning bolt 703 can be with
Or else it is positioned when use, and one end of positioning bolt 703 is pierced into through-hole 702, the top of mounting base 701 is solid
Surely it is connected with ruler plate 704, graduation mark 705 is provided on ruler plate 704, the top of ruler plate 704 is connected with reading plate 706, and
The lower section of reading plate 706 is fixedly connected with measurement needle 707, and the bottom of measurement needle 707 through measured hole 4 and extends downwardly, measures
Needle 707 is inserted into testee, meanwhile, the scale on ruler plate 704 is observed that by the movement of reading plate 706, and can
Facilitate and carry out detecting its thickness, does not need hand-held setting, and its precision can be improved, it is convenient that building is detected.
Embodiment two:
As shown in Figs. 1-5, on the basis of example 1, the present invention provides a kind of technical solution: assisting magnetic-type support
Device 8 includes two groups of connecting rods 801, and 801 one end of connecting rod is connect with sliding slot 6 far from the side of measuring thickness device 7, and its other side passes through
Magnet block A802 is fixedly connected with the other end of sliding slot 6, irony sliding block 803 is connected on the surface of connecting rod 801, and every
It is fixedly connected with fixed link 804 between two irony sliding blocks 803 of group, the outer surface of fixed link 804 is connected with eccentric wheel
805, the top of 5 inner wall of square groove is arranged in sliding slot 6, and the bottom of eccentric wheel 805 and 5 inner wall of square groove is equipped with spacing, guarantees
Eccentric wheel 805 will not rub or block with square groove 5 in the rotation, be convenient for prolonged use and operation, eccentric wheel
Magnet block B806, magnetic between two magnet block B806 of same level are fixedly connected on 805 surfaces far from fixed link 804
Pole assists magnetic-type support device 8 on the contrary, can attract each other, by setting, and inclined when measuring 707 free-falling of needle
Contacted at heart wheel 805, and make eccentric wheel 805 while the rotation of fixed link 804, can irony in fixed link 804 it is sliding
Block 803 can be moved outward by connecting rod 801, without limitation on the movement of measurement needle 707, and during not using,
Conplane two eccentric wheels 805 keep horizontal, and two stimulate mutual magnetic between opposite magnet block B806, irony
Sliding block 803 and magnet block A802 magnetic wait the second task, it is ensured that its precision measured facilitates its building detection
It uses.
Embodiment three:
As shown in Figs. 1-5, on the basis of embodiment one, embodiment two, the present invention provides a kind of technical solution: same water
Distance of the two magnet block B806 of plane between after complete magnetic is less than the diameter of measurement needle 707, so that measurement next time needle
707 eccentric wheel 805 in the two sides free-falling Shi Keyu contacts, can not only protection needle 707, can also improve the essence of its measurement
Accuracy.
Example IV:
As shown in Figs. 1-5, on the basis of embodiment one, embodiment two, embodiment three, the present invention provides a kind of technical side
Case: the bottom of eccentric wheel 805 is also fixedly connected with an elastic element 807, and elastic element 807 can be adjustable spring, and elastic
The other end of element 807 is connect with the bottom of 5 inner wall of square groove, the setting of elastic element 807, so that measurement needle 707 is falling
When have the function of Auxiliary support, will not allow the unexpected whereabouts of measurement needle 707, and without using when be restored back to bullet, restore
It is in situ, convenient for the use to building detection.
In use, the object that user detects needs is put on bottom plate 1, and pressing plate 2 pushes, and passes through positioning screw cap
9 are fixed, and 707 measurement needles and contact when free-falling at eccentric wheel 805, and make eccentric wheel 805 in fixation
While the rotation of bar 804, can the irony sliding block 803 in fixed link 804 can be moved outward by connecting rod 801, will not limit
The movement of system measurement needle 707, and elastic element 807 has the function of Auxiliary support, meanwhile, pass through the movement of reading plate 706
It can be observed that the scale on ruler plate 704, and can facilitate and carry out detecting its thickness, hand-held setting is not needed, and can improve
Its precision, it is convenient that building is detected；
When not detecting, conplane two eccentric wheels 805 keep horizontal, and the magnet that two stimulations are opposite
Mutual magnetic between block B806, irony sliding block 803 and magnet block A802 magnetic wait the second task, it is ensured that it was measured
Precision, and without using when be restored back to bullet, set back, convenient for building detection use.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including a reference structure ", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and only illustrating for the description in above embodiments and description is of the invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these change and change
Into all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
It defines.
Claims (7)
1. a kind of free-falling formula aciculiform calibrator for building, including bottom plate (1) and pressing plate (2), it is characterised in that: the pressing plate
(2) it is flexibly connected between the bottom plate (1) by connecting bracket (3), and is threaded on the surface of connecting bracket (3)
The centre of positioning screw cap (11), the pressing plate (2) offers a measured hole (4), offers 6- on the inside of the measured hole (4)
The two sides of 8 groups of square grooves (5), square groove (5) inner wall offer a sliding slot (6), and the interior of the measured hole (4) is provided with
Measuring thickness device (7), the square groove (5) is interior to be provided with the magnetic-type support device (8) of auxiliary；
The measuring thickness device (7) includes the mounting base (701) being fixedly connected on pressing plate (2), and at the top of the mounting base (701)
Centre offer the through-hole (702) being connected to measured hole (4), the flank threads of the mounting base (701) are connected with positioning
Bolt (703), and one end of the positioning bolt (703) is pierced into through-hole (702), the top of the mounting base (701) is fixed
It is connected with ruler plate (704), is provided on ruler plate (704) graduation mark (705), be connected with reading above the ruler plate (704)
Number plate (706), and measurement needle (707) is fixedly connected with below reading plate (706), the bottom of measurement needle (707) is run through
Measured hole (4) simultaneously extends downwardly.
2. a kind of free-falling formula aciculiform calibrator for building according to claim 1, it is characterised in that: the auxiliary magnetic
Suction support device (8) includes two groups of connecting rods (801), and described connecting rod (801) one end and sliding slot (6) are far from measuring thickness device (7)
Side connection, and its other side is fixedly connected by magnet block A (802) with the other end of the sliding slot (6), the connecting rod
(801) it is connected on surface irony sliding block (803), and fixed between every group of two irony sliding blocks (803)
It is connected with fixed link (804), the outer surface of the fixed link (804) is connected with eccentric wheel (805), the eccentric wheel
(805) magnet block B (806) are fixedly connected on the surface far from fixed link (804).
3. a kind of free-falling formula aciculiform calibrator for building according to claim 2, it is characterised in that: same level
Two magnet block B (806) between magnetic pole it is opposite.
4. a kind of free-falling formula aciculiform calibrator for building according to claim 3, it is characterised in that: same level
Distance of two magnet block B (806) between after complete magnetic be less than the diameter of measurement needle (707).
5. a kind of free-falling formula aciculiform calibrator for building according to claim 4, it is characterised in that: the sliding slot
(6) setting is in the top of square groove (5) inner wall, and the bottom of the eccentric wheel (805) and square groove (5) inner wall is equipped with spacing.
6. a kind of free-falling formula aciculiform calibrator for building according to claim 5, it is characterised in that: the pressing plate
(2) it is provided on surface square groove (9), and the inner wall of square groove (9) is equipped with observation window (10).
7. a kind of free-falling formula aciculiform calibrator for building according to claim 6, it is characterised in that: the eccentric wheel
(805) bottom is also fixedly connected with an elastic element (807), and the elastic element (807) can be adjustable spring, and described
The other end of elastic element (807) is connect with the bottom of square groove (5) inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474262.4A CN110145990B (en) | 2019-06-03 | 2019-06-03 | Free-falling needle-shaped thickness gauge for building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474262.4A CN110145990B (en) | 2019-06-03 | 2019-06-03 | Free-falling needle-shaped thickness gauge for building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110145990A true CN110145990A (en) | 2019-08-20 |
| CN110145990B CN110145990B (en) | 2021-09-24 |
Family
ID=67589914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910474262.4A Expired - Fee Related CN110145990B (en) | 2019-06-03 | 2019-06-03 | Free-falling needle-shaped thickness gauge for building |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110145990B (en) |
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| CN207797947U (en) * | 2018-02-06 | 2018-08-31 | 孙倡立 | A kind of sediment thickness measuring instrument |
| CN208223340U (en) * | 2018-03-30 | 2018-12-11 | 中国建筑一局(集团)有限公司 | Special detection tool for loose material laying thickness |
| CN208333323U (en) * | 2018-06-25 | 2019-01-04 | 福建省地科勘测规划有限公司 | A kind of land surveying soil thickness measuring device |
| CN210374926U (en) * | 2019-10-23 | 2020-04-21 | 中建二局第二建筑工程有限公司 | Concrete floor thickness measurer |
| CN210512932U (en) * | 2019-09-10 | 2020-05-12 | 常州福升新材料科技有限公司 | Continuous thickness measuring device for sheet |
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2019
- 2019-06-03 CN CN201910474262.4A patent/CN110145990B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1059167A (en) * | 1962-10-18 | 1967-02-15 | Sogenique Service Ltd | Improvements in and relating to metrological apparatus |
| JP2008298730A (en) * | 2007-06-04 | 2008-12-11 | Toyo Tire & Rubber Co Ltd | Hard urethane foam thickness inspection jig |
| CN201514182U (en) * | 2009-11-05 | 2010-06-23 | 中国建筑第五工程局有限公司 | Multifunctional cast-in-situ floor slab concrete thickness detector |
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| CN208223340U (en) * | 2018-03-30 | 2018-12-11 | 中国建筑一局(集团)有限公司 | Special detection tool for loose material laying thickness |
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| CN210374926U (en) * | 2019-10-23 | 2020-04-21 | 中建二局第二建筑工程有限公司 | Concrete floor thickness measurer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110145990B (en) | 2021-09-24 |
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