CN112797870B - Fastener center distance detector - Google Patents
Fastener center distance detector Download PDFInfo
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- CN112797870B CN112797870B CN202110009029.6A CN202110009029A CN112797870B CN 112797870 B CN112797870 B CN 112797870B CN 202110009029 A CN202110009029 A CN 202110009029A CN 112797870 B CN112797870 B CN 112797870B
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- 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
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
Abstract
The invention provides a fastener center distance detector, and relates to the field of detection tools. The utility model provides a fastener centre-to-centre spacing detector, contains first detection chi and second detection chi, and above-mentioned first detection chi is used for detecting the first interval of two right angle fastener, and the second that above-mentioned second detection chi is used for detecting two right angle fastener is apart from. The invention can test the compression resistance of a plurality of right-angle fasteners and is convenient for replacing the right-angle fasteners which do not meet the safety standard.
Description
Technical Field
The invention relates to the field of detection tools, in particular to a fastener center distance detector.
Background
Because the requirement of high-speed railway to the smoothness of the track is very strict, and the complexity of the base structure and materials under the sleeper line can produce uneven deformation, thereby causing the unevenness of the rail surface and also causing the unevenness of the track due to construction errors. The 'bumping' is caused when the train passes through an unsmooth section at a high speed, the riding comfort is influenced, even the running safety of the train is threatened, and the smoothness of the steel rail needs to be adjusted at the moment. Generally, according to deformation data of the rail surface, a construction department can insert a method of a rail lower fine adjustment base plate and an iron base plate lower height adjustment base plate with different thicknesses to adjust the height of the rail surface so as to ensure the smoothness of the rail surface.
The lower-height-adjusting base plate of the fastener iron base plate is used as an important part in the fastener, and mainly used for adjusting the height of a steel rail and playing a role in vibration and noise reduction. The center distance of the fastener iron backing plate directly influences the use performance of the product, the product needs to be detected before leaving a factory, and the center distance is the distance from the intersection point between the outer inclined plane of the shoulder baffle plate of the lower-height-adjusting backing plate and the bottom surface of the horizontal plate to the center point of the waist-shaped through hole. In the prior art, the size detection tool for the iron base plate down-regulation height-adjustment base plate generally carries out measurement by contacting and positioning the shoulder blocking surface of a product and the inclined surface of the detection tool.
According to the different road environment of railway track, need set up the different right angle fastener of a plurality of intervals and install on strengthening the position, generally screw up each right angle fastener by maintainer when the railway is maintained and consolidate. But utilize present centre-to-centre spacing to detect the quality that the backing plate was increaseed under the fastener iron tie plate, can't test the compressive property of a plurality of right angle fasteners for there is the potential safety hazard in the railway.
Therefore, at present, a detection tool which can test the compression resistance of a plurality of right-angle fasteners and is convenient to replace the right-angle fasteners which are not in accordance with the safety standard is needed.
Disclosure of Invention
The invention aims to provide a fastener center distance detector which can test the compression resistance of a plurality of right-angle fasteners and is convenient for replacing the right-angle fasteners which do not meet the safety standard.
The embodiment of the invention is realized by the following steps:
the embodiment of the application provides a fastener centre-to-centre spacing detector, contains first detection chi and second detection chi, and above-mentioned first detection chi is used for detecting two right angle fastener's first interval, and above-mentioned second detection chi is used for detecting two right angle fastener's second interval.
In some embodiments of the present invention, the first measuring scale includes a first measuring scale, a first standard component and a first measuring component, the first measuring scale is used for measuring the first distance, and the first standard component and the first measuring component are respectively connected to the first measuring scale in an adjustable manner along the length direction of the first measuring scale.
In some embodiments of the present invention, the second measuring rule includes a second measuring rule, a second standard component and a second measuring component, the second measuring rule is used for measuring the second distance, and the second standard component and the second measuring component are respectively connected to the second measuring rule in an adjustable manner along the length direction of the second measuring rule.
In some embodiments of the present invention, the fastener center distance detector includes a connecting member, and the first measuring rule and the second measuring rule are connected to the connecting member with an adjustable distance therebetween.
In some embodiments of the present invention, the connecting member includes a first connecting member for adjusting a third distance between the first measuring rule and the second measuring rule, and a second connecting member for adjusting a fourth distance between the first measuring rule and the second measuring rule.
In some embodiments of the present invention, a third measuring rule is disposed on the connecting member, the third measuring rule is used for measuring a fifth distance between two of the right-angle fasteners, and the third measuring rule is located between the first measuring rule and the second measuring rule.
In some embodiments of the present invention, the third measuring tape includes a third measuring tape, a third standard member and a third measuring tape, the third measuring tape is located in the middle of the first measuring tape and the second measuring tape, and the third standard member and the third measuring tape are adjustably connected to the third measuring tape along the length direction of the third measuring tape.
In some embodiments of the present invention, the third measuring rule includes a first adjusting member for adjusting a distance between the first measuring rule and one end of the second measuring rule, and a second adjusting member for adjusting a distance between the first measuring rule and the other end of the second measuring rule.
In some embodiments of the present invention, the first adjusting member or the second adjusting member includes a bidirectional screw horizontally rotatably connected to the connecting member, a first nut, and a second nut, the third measuring tape is installed at a middle portion of the bidirectional screw, the bidirectional screw is provided with a first screw portion and a second screw portion which are opposite to each other, the first screw portion is engaged with the first nut, the second screw portion is engaged with the second nut, the first detecting tape is installed at the first nut, and the second detecting tape is installed at the second nut.
In some embodiments of the present invention, the first adjusting member or the second adjusting member includes a rotating member vertically rotatably connected to the connecting member, a first mounting rod and a second mounting rod, the third standard member or the third measuring member is mounted to the rotating member, the rotating member is connected to a gear, the first mounting rod is provided with a first rack engaged with the gear, the second mounting rod is provided with a second rack engaged with the gear, the first measuring ruler is connected to the first mounting rod, and the second measuring ruler is connected to the second mounting rod.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
the utility model provides a fastener centre-to-centre spacing detector, contains first detection chi and second detection chi, and above-mentioned first detection chi is used for detecting the first interval of two right angle fastener, and the second that above-mentioned second detection chi is used for detecting two right angle fastener is apart from.
The mounting distance between two adjacent right-angle fasteners is detected through the first detection ruler and the second detection ruler, so that whether the distance between the two adjacent fasteners meets the railway safety standard or not is judged; the first interval that detects two right angle fittings through first detection chi, the second detects the second interval that the chi detected two right angle fittings to judge whether not hard up, warp or the installation is unqualified for two adjacent fasteners according to the size of first interval and second interval, be convenient for adjust or change unqualified fastener, solved the potential safety hazard of railway. Utilize first measuring rule and second to detect the first interval and the second interval that the chi detected two adjacent fasteners to utilize the radius of fastener can calculate the centre-to-centre spacing of two fasteners, the distance in the centre of a circle of two right angle fasteners promptly, thereby whether the installation that detects two right angle fasteners and performance satisfy the installation strength requirement of railway.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a fastener center distance detector according to an embodiment of the present invention;
FIG. 2 is a schematic view of a right-angle fastener assembly according to an embodiment of the present invention;
FIG. 3 is a first schematic structural diagram of a first adjusting member or a second adjusting member according to an embodiment of the present invention;
fig. 4 is a second schematic structural diagram of the first adjusting member or the second adjusting member according to the embodiment of the invention.
An icon: 1-a mounting rack, 2-a first measuring scale, 3-a second measuring scale, 4-a right-angle fastener, 5-a first standard part, 6-a first measuring part, 7-a second standard part, 8-a second measuring part, 9-a third standard part, 10-a third measuring part, 11-a median line, 12-a first connecting part, 13-a second connecting part, 14-a third measuring scale, 15-a circle center, 16-a second nut, 17-a bidirectional screw, 18-a first nut, 19-a sliding seat, 20-a rotating part, 21-a gear, 22-a first mounting rod and 23-a second mounting rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
Referring to fig. 1 to 4, fig. 1 to 4 show a fastener center distance detector. This embodiment provides a fastener centre-to-centre spacing detector, contains first detection chi and second detection chi, and above-mentioned first detection chi is used for detecting two right angle fastener 4's first interval H1, and above-mentioned second detection chi is used for detecting two right angle fastener 4's second interval H2.
In detail, when two right angle buckle spare 4 were installed through orbital mounting bracket 1, utilize first detection chi to detect two right angle buckle spare 4 one sides and obtain first interval H1, can detect two right angle buckle spare 4 opposite sides simultaneously through the second and obtain second interval H2, and then compare first interval H1 and second interval H2 whether the same, when inequality, explain at least one of them right angle buckle spare 4's installation unqualified or not hard up. Alternatively, the first detection ruler and the second detection ruler may be arranged in parallel so as to be used for detecting two identical right-angle components. Optionally, the length of the median line 11 can be calculated or measured by a quadrangle surrounded by the first detection ruler and the second detection ruler, so that the size of the center distance can be calculated by a trapezoid surrounded by the median line 11, the radii of the centers 15 of the two right-angle fasteners 4 and the center distance. Wherein, two known right angle fasteners 4 are located the radius of line 11 both ends to centre of a circle 15 on the median, utilize centre-to-centre spacing size can be more accurate judge whether right angle fastener 4's performance accords with the requirement of railway compression resistance condition. Wherein, first detection chi and second detect the chi when detecting two right angle fastener 4, and each right angle fastener 4 is located the radius homogeneous phase that first detection chi and second detected the chi. Optionally, the connecting line of the end portions of the first detection ruler and the second detection ruler is the diameter passing through the circle center 15 of the right-angle fastener 4. Detect first interval H1 and second interval H2 between two right angle buckle spare 4 through first detection chi and second detection chi, through the big or small error of comparing first interval H1 and second interval H2, whether two right angle buckle spare 4 that obtain detecting out are qualified, thereby adjustment or change right angle buckle spare 4, and be convenient for obtain the centre-to-centre spacing valuation according to first interval H1 and second interval H2, more accurate judgement right angle buckle spare 4's performance, the security that has improved railway transportation.
The center distance can be calculated by using a trapezoidal formula, namely, the height of a trapezoid is firstly solved, and a right-angled triangle is formed by making a perpendicular line from the vertex of the waist of the known trapezoid to the bottom of the trapezoid. Wherein the vertical line is the height of the trapezoid, and the hypotenuse of the right triangle is the known waist. One right-angle side of the right-angle triangle is the difference between the upper and lower bottoms of the trapezoid, and the other right-angle side is the height of the trapezoid, and can be obtained according to the pythagorean theorem. Similarly, a perpendicular line is drawn from the vertex of the other waist to the bottom of the trapezoid to form a right triangle, and the length of the hypotenuse, i.e., the unknown waist length of the trapezoid, can be obtained.
In some embodiments of the present invention, the first measuring tape includes a first measuring tape 2, a first standard component 5 and a first measuring component 6, the first measuring tape 2 is used for measuring the first distance H1, and the first standard component 5 and the first measuring component 6 are respectively connected to the first measuring tape 2 in an adjustable manner along a length direction of the first measuring tape 2.
In detail, the first measuring tape 2 is used to measure the first distance H1 between the two right-angle fasteners 4, so that the length direction of the first measuring tape 2 extends along between the two right-angle fasteners 4. First mark 5 and first measuring part 6 are connected in first measuring tape 2 along the length direction of first measuring tape 2 adjustable respectively, and first mark 5 and first measuring part 6 can be respectively through the slide rail slip match in first measuring tape 2, also can directly overlap and locate first measuring tape 2. Correspond two right angle buckle's 4 positions respectively through first mark spare 5 and first measuring tape 6 to measure through the scale on the first measuring tape 2, be applicable to two right angle buckle's 4 uses of interval difference.
In some embodiments of the present invention, the second measuring tape includes a second measuring tape 3, a second standard member 7 and a second measuring member 8, the second measuring tape 3 is used for measuring the second distance H2, and the second standard member 7 and the second measuring member 8 are respectively connected to the second measuring tape 3 in an adjustable manner along a length direction of the second measuring tape 3.
In detail, the second measuring tape 3 is used for measuring the second distance H2 between the two right-angle fasteners 4, so that the length direction of the second measuring tape 3 extends along the space between the two right-angle fasteners 4. The second standard part 7 and the second measuring part 8 are respectively connected to the second measuring tape 3 in an adjustable manner along the length direction of the second measuring tape 3, and the second standard part 7 and the second measuring part 8 can be respectively matched with the second measuring tape 3 through sliding rails in a sliding manner. Correspond two right angle buckle's 4 positions respectively through second mark spare 7 and second measuring tape 8 to measure through the scale on the second measuring tape 3, be applicable to two right angle buckle's 4 uses of interval difference.
In some embodiments of the present invention, the fastener center distance detector includes a connecting member, and the first measuring rule and the second measuring rule are connected to the connecting member with an adjustable distance therebetween.
In detail, detect chi and second through the connecting piece with two first detection chi and be connected, convenient to use to can detect chi parallel arrangement with first detection chi and second, satisfy two the same right angle subassemblies and use. When the device is used, the connecting piece, the first detection ruler or the second detection ruler can be arranged on a rail to be positioned. In detail, first measuring tape and second measuring tape are connected in the connecting piece with adjustable interval, and wherein first measuring tape and second measuring tape can be passed through the slide rail and slide and match in the connecting piece to utilize the slide rail to adjust the distance that first measuring tape and second measured the chi, be adapted to the right angle fastener 4 of different diameters size and use.
In some embodiments of the present invention, the connecting member includes a first connecting member 12 and a second connecting member 13, the first connecting member 12 is used for adjusting a third distance between the first detection ruler and the second detection ruler, and the second connecting member 13 is used for adjusting a fourth distance between the first detection ruler and the second detection ruler.
In detail, the first connecting member 12 may be disposed at one end of the first measuring rule and the second measuring rule, and the second connecting member 13 may be disposed at the other end of the first measuring rule and the second measuring rule. Optionally, when first detection chi and second detection chi parallel arrangement, the size of third interval and fourth interval is the same, adjusts the size of third interval through first connecting piece 12 to adjust the size of fourth interval through second connecting piece 13, be convenient for adapt to the capability test of two right angle buckle spare 4 of the same size.
In some embodiments of the present invention, a third measuring rule is disposed on the connecting member, the third measuring rule is used for measuring a fifth distance between two right-angle fasteners 4, and the third measuring rule is located between the first measuring rule and the second measuring rule.
In detail, the third detection ruler is located between first detection ruler and the second detection ruler for detect the fifth interval of two right angle fittings 4, the third detection ruler is connected in the connecting piece, thereby further adjusting the installation of right angle fittings 4 according to the testing result of third detection ruler, improved the performance detection efficiency of right angle fittings 4.
In some embodiments of the present invention, the third measuring tape includes a third measuring tape 14, a third standard component 9 and a third measuring tape 10, the third measuring tape 14 is located in the middle of the first measuring tape and the second measuring tape, and the third standard component 9 and the third measuring tape 10 are adjustably connected to the third measuring tape 14 along the length direction of the third measuring tape 14.
In detail, the third measuring tape 14 extends in a length direction between the two right-angle seizing means 4, thereby detecting a fifth distance between the two right-angle seizing means 4. Alternatively, the third scale 9 and the third measuring part 10 can be slidably connected to the third measuring tape 14 along the length direction of the third measuring tape 14 by a sliding rail, so that the third scale 9 and the third measuring part 10 correspond to one of the right-angle scales respectively. Alternatively, the third measuring tape 14 may be transparent so that the third measuring tape and the third measuring tape 14 are aligned with the center of the right-angle fastener 4 for measurement.
In some embodiments of the present invention, the third measuring rule includes a first adjusting member for adjusting a distance between the first measuring rule and one end of the second measuring rule, and a second adjusting member for adjusting a distance between the first measuring rule and the other end of the second measuring rule.
In detail, the third detection ruler utilizes the first regulating part to adjust the interval of the one end of the first detection ruler and the second detection ruler, and utilizes the second regulating part to adjust the interval of the other end of the first detection ruler and the second detection ruler, so that the third detection ruler is suitable for the detection of the right-angle fasteners 4 with different diameters, and the use of the right-angle fasteners 4 with different diameters is met.
In some embodiments of the present invention, the first adjusting member or the second adjusting member includes a bidirectional screw 17, a first nut 18 and a second nut 16, the bidirectional screw 17 is horizontally rotatably connected to the connecting member, the third measuring tape 14 is installed at a middle portion of the bidirectional screw 17, the bidirectional screw 17 is provided with a first screw portion and a second screw portion which are opposite to each other, the first screw portion is matched with the first nut 18, the second screw portion is matched with the second nut 16, the first measuring tape is installed at the first nut 18, and the second measuring tape is installed at the second nut 16.
In detail, the third measuring tape 14 is installed in the middle of the bidirectional screw 17 of the first adjusting member or the second adjusting member, wherein the third standard component 9 or the third measuring component 10 is arranged between the first thread part and the second thread part through the third measuring tape 14. The two-way screw 17 is horizontally installed to the connection member through a bearing, and when the two-way screw 17 is rotated, the first detection ruler moves along the first thread portion along with the first nut 18, and simultaneously the second detection ruler moves in the opposite direction to the first detection ruler along the second thread portion along with the first nut 18. Wherein the first and second screw portions are arranged oppositely along the length direction of the bidirectional screw 17. Alternatively, the bidirectional screw 17 may be rotated by a handle at the end. The third detection ruler is arranged in the middle of the first detection ruler and the second detection ruler by the bidirectional screw 17, so that the neutral line 11 is measured by the third detection ruler when the first detection ruler and the second detection ruler are adjusted, and the center distance is calculated according to the neutral line 11. Wherein, because the bidirectional screw 17 will rotate, the third measuring tape 14 can be matched with the bidirectional screw 17 in a sliding way by the sliding seat 19.
In some embodiments of the present invention, the first adjusting member or the second adjusting member includes a rotating member 20, a first mounting rod 22 and a second mounting rod 23, the rotating member 20 is vertically and rotatably connected to the connecting member, the third measuring tape 14 is mounted to the rotating member 20, the rotating member 20 is connected to a gear 21, the first mounting rod 22 is provided with a first rack engaged with the gear 21, the second mounting rod 23 is provided with a second rack engaged with the gear 21, the first measuring tape is connected to the first mounting rod 22, and the second measuring tape is connected to the second mounting rod 23.
In detail, the rotating part 20 can be vertically installed on the connecting part through a bearing, the rotating part 20 is used for installing the third measuring tape 14, the rotating part 20 drives the first installing rod 22 and the second installing rod 23 to move in opposite directions by utilizing the gear 21, so that the third measuring tape 14 is installed in the middle of the first measuring tape and the second measuring tape through the rotating part 20, the center distance of the two right-angle fasteners 4 is conveniently calculated after the third standard part 9 and the third measuring tape 10 are used for measuring the neutral line 11, and whether the plurality of right-angle fasteners 4 meet the requirement of compressive strength is judged. The first mounting rod 22 and the second mounting rod 23 are horizontally arranged, the first rack is arranged along the length direction of the first mounting rod 22, and the second rack is arranged along the length direction of the second mounting rod 23.
In summary, the embodiment of the present invention provides a fastener center distance detector:
the installation distance between two adjacent right-angle fasteners 4 is detected through a first detection ruler and a second detection ruler, so that whether the distance between the two adjacent fasteners meets the railway safety standard or not is judged; the first interval H1 that detects two right angle fasteners 4 through first detection chi, the second detects the second interval H2 that the chi detected two right angle fasteners 4 to judge whether two adjacent fasteners are not hard up, warp or install nonconforming according to first interval H1 and second interval H2's size, be convenient for adjust or change unqualified fastener, solved the potential safety hazard of railway. Utilize first measuring rule and second to detect the first interval H1 and the second interval H2 that the chi detected two adjacent fasteners to the radius that utilizes the fastener can calculate the centre-to-centre spacing of two fasteners, the distance of the centre of a circle 15 of two right angle buckle spare 4 promptly, thereby whether the installation that detects two right angle buckle spare 4 satisfies the installation strength requirement of railway with the performance.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A fastener center distance detector is characterized by comprising a first detection ruler and a second detection ruler, wherein the first detection ruler is used for detecting a first distance between the two right-angle fasteners on the same side, and the second detection ruler is used for detecting a second distance between the two right-angle fasteners on the other side; the first detection ruler and the second detection ruler can be arranged in parallel; the first detection ruler and the second detection ruler are connected to the connecting piece in a distance-adjustable manner; the connecting piece comprises a first connecting piece and a second connecting piece, the first connecting piece is used for adjusting a third distance between the first detection ruler and the second detection ruler, and the second connecting piece is used for adjusting a fourth distance between the first detection ruler and the second detection ruler; a third detection ruler is arranged on the connecting piece and used for measuring a fifth distance between the two right-angle fasteners, and the third detection ruler is positioned between the first detection ruler and the second detection ruler; the first connecting piece is arranged at one end of the first detection ruler and one end of the second detection ruler, and the second connecting piece is arranged at the other end of the first detection ruler and the other end of the second detection ruler; when the two right-angle fasteners are detected, the radiuses of the first detection ruler and the second detection ruler of each right-angle fastener are the same; the connecting line of the end parts of the first detection ruler and the second detection ruler is the diameter passing through the circle center of the right-angle fastener; the length of the median line is calculated through a quadrangle surrounded by the first detection ruler and the second detection ruler or the length of the median line is measured through the third detection ruler, so that the center distance is calculated through trapezoids surrounded by the median line, the circle center radiuses of the two right-angle fasteners and the center distance.
2. The apparatus as claimed in claim 1, wherein the first measuring ruler comprises a first measuring ruler, a first standard member and a first measuring member, the first measuring ruler is used for measuring the first distance, and the first standard member and the first measuring member are respectively connected to the first measuring ruler in an adjustable manner along a length direction of the first measuring ruler.
3. The apparatus of claim 1, wherein the second measuring tape comprises a second measuring tape, a second standard member and a second measuring member, the second measuring tape is used for measuring the second distance, and the second standard member and the second measuring member are adjustably connected to the second measuring tape along a length direction of the second measuring tape.
4. The instrument of claim 1, wherein the third measuring tape comprises a third measuring tape, a third standard member and a third measuring member, the third measuring tape is located in the middle of the first measuring tape and the second measuring tape, and the third standard member and the third measuring member are adjustably connected to the third measuring tape along the length direction of the third measuring tape.
5. The instrument of claim 4, wherein the third detecting ruler comprises a first adjusting member and a second adjusting member, the first adjusting member is used for adjusting the distance between one end of the first detecting ruler and one end of the second detecting ruler, and the second adjusting member is used for adjusting the distance between the other end of the first detecting ruler and the other end of the second detecting ruler.
6. The instrument for detecting the center distance of a fastener according to claim 5, wherein the first and second adjusting members have the same structure and comprise a bidirectional screw, a first nut and a second nut, the bidirectional screw is horizontally and rotatably connected to the connecting member, the third measuring tape is installed in the middle of the bidirectional screw, the bidirectional screw is provided with a first threaded portion and a second threaded portion which are opposite, the first threaded portion is matched with the first nut, the second threaded portion is matched with the second nut, the first detecting tape is installed on the first nut, and the second detecting tape is installed on the second nut.
7. The instrument of claim 5, wherein the first and second adjusting members have the same structure and comprise a rotating member, a first mounting rod and a second mounting rod, the rotating member is vertically and rotatably connected to the connecting member, the third measuring tape is mounted on the rotating member, the rotating member is connected to a gear, the first mounting rod is provided with a first rack engaged with the gear, the second mounting rod is provided with a second rack engaged with the gear, the first measuring tape is connected to the first mounting rod, and the second measuring tape is connected to the second mounting rod.
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| US20110277331A1 (en) * | 2010-05-14 | 2011-11-17 | Glomb Sr Timothy J | Crown molding ruler |
| CN104790650B (en) * | 2015-04-14 | 2017-02-01 | 深圳市建设（集团）有限公司 | Steel pipe scaffold fastener |
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| CN111174670A (en) * | 2019-12-11 | 2020-05-19 | 上海三一重机股份有限公司 | Measuring assembly, bucket positioning hole and lug plate measuring device |
| CN212148860U (en) * | 2020-04-28 | 2020-12-15 | 河南鸿邦铁路器材有限公司 | Rail fastener size detection device |
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| EP0648681A1 (en) * | 1993-10-15 | 1995-04-19 | Schmalbach-Lubeca AG | Measuring spoon fastening in metal containers |
| US6813841B1 (en) * | 2003-01-07 | 2004-11-09 | Linda Kay Ramsey | Measuring device for teaching incremental measurements |
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