CN111156962A - Portable folding self-locking night vision leveling rod and use method - Google Patents
Portable folding self-locking night vision leveling rod and use method Download PDFInfo
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- CN111156962A CN111156962A CN202010061798.6A CN202010061798A CN111156962A CN 111156962 A CN111156962 A CN 111156962A CN 202010061798 A CN202010061798 A CN 202010061798A CN 111156962 A CN111156962 A CN 111156962A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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Abstract
The invention relates to a portable folding self-locking night vision leveling rod, which comprises: the self-locking mechanism comprises a main ruler, an auxiliary ruler, a self-locking revolute pair and a rope buckle, wherein the auxiliary ruler comprises a first auxiliary ruler and a second auxiliary ruler, and the self-locking revolute pair comprises a first self-locking revolute pair and a second self-locking revolute pair. The invention has the beneficial effects that: the leveling rod auxiliary ruler can be rotated and unfolded for use, the use method is simple, the structure is reasonable, and the practical engineering operation implementation is strong; the leveling rod auxiliary ruler is connected with the two ends of the main ruler through the self-locking revolute pair, can be folded and unfolded, is light, flexible and easy to carry, can be easily and simply placed in a general small-sized transport tool, is convenient to transport, saves the physical force of measurement workers in carrying, and improves the measurement efficiency; the self-locking revolute pair enables the leveling rod to be self-locked after being unfolded, so that the phenomenon that the leveling rod is not flat and the measuring result is inaccurate in the measuring process is avoided; the leveling rod scale is made of reflecting materials such as a fluorescent full-prism reflecting film and the like, and is suitable for measurement operation of subway tunnels in various dark environments.
Description
Technical Field
The invention relates to the technical field of engineering measurement articles, in particular to a portable folding self-locking night vision leveling rod and a using method thereof, which are suitable for leveling operation in a tunnel.
Background
The leveling rod is an instrument for measuring the height difference between two points on the ground according to the leveling principle. At present, most leveling rods are made of wood, aluminum or glass fiber reinforced plastic, the length of the leveling rod is 3 meters, and two leveling rods are used as a pair and on two sides. The double surfaces of the ruler are both provided with scores, and the front surface is black and white alternately, so that the ruler is called a black surface ruler (also called a main ruler); the back is red and white, and is called as red ruler (also called as auxiliary ruler). Because the leveling rod chi body itself has a take the altitude and weight is great, seriously consumes constructor's physical power in the handling, has reduced measurement of efficiency. Simultaneously, the levelling rod is inconvenient to place at will in the transportation because of the scale required precision, and the length is not enough in the general small-size transport means moreover and leads to the levelling rod to stretch out the window and transport, has certain risk.
In addition, in the increasing cities of subways, leveling rulers are required for measuring the interior of a tunnel more and more. However, the inside of the tunnel belongs to a dark environment, the illumination is insufficient, the reading is difficult, and the engineering progress of measuring personnel is seriously influenced. The height limitation to a certain extent also imposes complex requirements on the handling of the leveling rod. The above are all the problems that the actual engineering measurement personnel face to be solved urgently.
Therefore, a portable leveling rod is needed to be invented, so that the leveling rod is convenient for measurement personnel to take and carry, and can continuously adapt to work in a dark environment inside a tunnel and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a portable folding self-locking night vision leveling rod and a using method thereof.
The portable folding self-locking night vision leveling rod comprises a main rod, an auxiliary rod, a self-locking revolute pair and a rope buckle, wherein the auxiliary rod comprises a first auxiliary rod and a second auxiliary rod; the first auxiliary ruler and the second auxiliary ruler are connected to the two ends of the main ruler through a first self-locking revolute pair and a second self-locking revolute pair respectively; the ends of the two auxiliary rulers in the folded state are connected through a rope fastener, and the rope fastener mainly comprises an elastic rope, a first hook and a second hook.
Preferably, the method comprises the following steps: the first self-locking revolute pair and the second self-locking revolute pair are respectively arranged at the upper end and the lower end of the main scale in the height direction.
Preferably, the method comprises the following steps: the auxiliary ruler and the main ruler in the unfolded state are parallel and are in a straight line and fixed; the folding auxiliary ruler is attached to the surface of the main ruler.
Preferably, the method comprises the following steps: the width of the auxiliary ruler is smaller than that of the main ruler; the sum of the heights of the two auxiliary rulers is smaller than the height of the main ruler, a space is reserved between the two auxiliary rulers in a folded state, and the rope buckle is arranged at the space.
Preferably, the method comprises the following steps: a first end part protecting sleeve is arranged at the end part of the first auxiliary ruler, a first small hole is formed in the first end part protecting sleeve, a second end part protecting sleeve is arranged at the end part of the second auxiliary ruler, and a second small hole is formed in the second end part protecting sleeve; the first hook and the second hook are respectively connected with the first small hole and the second small hole; the end protective sleeve is made of rubber materials.
Preferably, the method comprises the following steps: handles are arranged on two sides of the main scale.
Preferably, the method comprises the following steps: the scales of the main ruler and the auxiliary ruler are marked by reflecting materials, and the scales are covered with a fluorescent full-prism reflecting film which is a prism type retro-reflecting material finished by a full-prism structure.
The use method of the portable folding self-locking night vision leveling rod comprises the following steps:
1) unfolding the secondary ruler from the folded state: the first auxiliary ruler in a folded state is unfolded to be parallel to the main ruler through positive rotation, the second auxiliary ruler is unfolded to be parallel to the main ruler through positive rotation, and the first auxiliary ruler and the second auxiliary ruler are screwed down through the self-locking rotation side effect, so that a measuring leveling ruler with a certain height is formed;
2) the leveling rod in an unfolded state is used for measuring, the scales of the main rod and the auxiliary rod are marked by using reflecting materials, and the scales are covered with a fluorescent full-prism reflecting film, so that the ruler can be normally used in a dark environment;
3) turning the auxiliary ruler to a folded state: after the measurement is finished, when the leveling rod is carried or retracted, the first auxiliary rod in an unfolded state is rotated to be attached to the surface of the main rod through reverse rotation, the second auxiliary rod is also rotated to be attached to the surface of the main rod through reverse rotation, the first hook on the rope buckle is connected with the first small hole on the first end part protective sleeve of the first auxiliary rod, and the second hook is connected with the second small hole on the second end part protective sleeve of the second auxiliary rod, so that a stable leveling rod whole body with a reduced volume is formed; the measuring staff utilizes the handle of main scale lateral part to carry, places properly.
The invention has the beneficial effects that:
(1) the leveling rod auxiliary ruler can be rotated and unfolded for use, the using method is simple, the structure is reasonable, and the practical engineering operation implementation is strong.
(2) The leveling rod auxiliary ruler is connected with the two ends of the main ruler through the self-locking revolute pair, can be folded and unfolded, is light, flexible and easy to carry, can be easily and simply placed in a common small-sized transport tool, is convenient to transport, saves physical force for carrying measurement workers, and improves measurement efficiency.
(3) The self-locking revolute pair enables the leveling rod to be self-locked after being unfolded, so that the phenomenon that the leveling rod is not flat and the measuring result is inaccurate in the measuring process is avoided.
(4) The leveling rod scale adopts reflecting materials such as a fluorescent full-prism reflecting film and the like, and is suitable for the measurement operation of subway tunnels in various dark environments.
(5) According to the leveling rod, the rubber protective sleeves are arranged at the top and the bottom of the leveling rod, and the membrane structures are arranged on the scale surfaces of the leveling rod, so that the problem that the measurement accuracy is influenced by high abrasion, unclear scale and the like of the leveling rod in the long-time use process is effectively solved.
Drawings
FIG. 1 is a schematic view of a leveling rod in a folded state;
FIG. 2 is a schematic view of the leveling rod in an extended state;
FIG. 3 is a detailed view of the cord lock;
FIG. 4 is a detailed view of the self-locking revolute pair;
FIG. 5 is a schematic view of a positive rotation;
fig. 6 is a schematic reverse rotation diagram.
Description of reference numerals: 1. a main scale; 2-1, a first auxiliary ruler; 2-2. a second auxiliary ruler; 3-1, a first self-locking revolute pair; 3-2, a second self-locking revolute pair; 4-1. a first end protection sleeve; 4-2. a second end protection sleeve; 5. a handle; 6-1, elastic ropes; 6-2, a first hook; 6-3, a second hook; 7. positively rotating; 8. carrying out reverse rotation; 9-1. a first orifice; 9-2. second aperture.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The invention provides a portable folding self-locking night vision leveling rod, which is a new measure for engineering measurement, in particular to the innovation of the leveling rod used for monitoring and researching on-site tunnels and the like.
As shown in fig. 1-2, the portable folding self-locking night vision leveling rod comprises a main rod 1, two auxiliary rods, two self-locking revolute pairs, end protective sleeves of the two auxiliary rods, and two handles 5. The first auxiliary ruler 2-1 and the second auxiliary ruler 2-2 are connected to two ends of the main ruler 1 through a first self-locking revolute pair 3-1 and a second self-locking revolute pair 3-2 respectively, so that the auxiliary rulers can rotate.
As shown in fig. 3, the portable folding self-locking night vision leveling rod further comprises a rope buckle which is used in a matched mode, and the rope buckle mainly comprises an elastic rope 6-1, a first hook 6-2 and a second hook 6-3.
As shown in fig. 4, the self-locking revolute pair is a connecting piece which allows two members to relatively rotate around a common axis, and the self-locking, namely the auxiliary ruler rotates positively 7 and then the revolute pair member is continuously screwed and fastened, and rotates reversely 8 and then the revolute pair member is continuously loosened and rotated.
More specifically, the first self-locking revolute pair 3-1 and the second self-locking revolute pair 3-2 are respectively arranged at the upper end and the lower end of the main scale 1 in the height direction (the long side direction of the main scale in fig. 1 is the height direction) and used for respectively butting the auxiliary scale and the main scale, namely the first self-locking revolute pair 3-1 is connected with the first auxiliary scale 2-1 and the main scale 1, and the second self-locking revolute pair 3-2 is connected with the second auxiliary scale 2-2 and the main scale 1. After the auxiliary ruler rotates to a position parallel to the main ruler in a positive mode, the auxiliary ruler cannot rotate in the positive mode due to the self-locking rotation side effect, and the auxiliary ruler is completely unfolded and fixed in a straight line with the main ruler. Therefore, the phenomenon that the leveling rod is not flat to cause inaccurate measuring results can not occur in the measuring process.
More specifically, the width of the auxiliary ruler (the length of the short side of the auxiliary ruler in fig. 1 is the width of the auxiliary ruler) is slightly smaller than the width of the main ruler 1 (the length of the short side of the main ruler in fig. 1 is the width of the main ruler), so that the auxiliary ruler can be attached to the main ruler 1 through the counter-rotation 8 and the outer side is not exposed, and the leveling ruler structure is integrally reduced and further convenient to carry and transport. The sum of the total heights of the two auxiliary scales (the length of the long side of the auxiliary scale is the height of the auxiliary scale in figure 1) is smaller than the height of the main scale 1 (the length of the long side of the main scale is the height of the main scale in figure 1), so that the two auxiliary scales are spaced after rotating to the surface of the main scale.
More specifically, in order to fix the two sub-rulers which are folded by the reverse rotation 8, a rope fastener is arranged at the joint interval of the two sub-rulers. The two hooks are respectively connected with the two auxiliary rulers, namely the first hook 6-2 and the second hook 6-3 are respectively connected with a first small hole 9-1 on the first end protective sleeve 4-1 of the first auxiliary ruler 2-1 and a second small hole 9-2 on the second end protective sleeve 4-2 of the second auxiliary ruler 2-2. The auxiliary ruler can be flatly attached to the surface of the main ruler in the folded state through the fastening connection of the rope buckle.
More specifically, one end of the first auxiliary ruler 2-1 and one end of the first auxiliary ruler 2-2 are respectively provided with a first end protective sleeve 4-1 and a second end protective sleeve 4-2 made of rubber with a certain thickness, so that the measuring scales at the top and the bottom of the leveling rod can be protected from being worn for a long time and cannot be used, and the end protective sleeves are provided with small holes for connecting with hooks on the rope buckle.
As shown in fig. 5-6, the auxiliary ruler is rotated forward 7 to unfold from the main ruler surface to be attached in a rotating manner parallel to the main ruler direction, and the auxiliary ruler is rotated backward 8 to unfold from the main ruler direction to be attached in a rotating manner parallel to the main ruler surface.
More specifically, the main scale 1 is provided with a handle 5 which is convenient to carry and is respectively positioned at two sides.
More specifically, the scale of main scale 1 and secondary scale uses reflecting material mark and covers the full prism reflective membrane of fluorescence on the scale, the full prism reflective membrane of fluorescence is the contrary reflective material of prism type that uses the full prism structure to accomplish, has advantages such as positive luminance is big, long-distance easy discovery, and the reading can be observed to the weak illumination under the dark environment of being convenient for, is applicable to the measuring environment of the inside dark of tunnel very much.
The use method of the portable folding self-locking night vision leveling rod comprises the following steps:
1) unfolding the auxiliary ruler from the folded state (use)
As shown in fig. 2, the first sub ruler 2-1 in the folded state is unfolded to be parallel to the main ruler 1 by the positive rotation 7, and the second sub ruler 2-2 is also unfolded to be parallel to the main ruler 1 by the positive rotation 7 and is tightened by the self-locking rotation side effect, thereby forming the measuring leveling rod with a certain height.
2) The leveling rod in an unfolded state is used for measuring, the scales of the main rod and the auxiliary rod are marked by using a reflecting material, and the scales are covered with a fluorescent full-prism reflecting film, so that the ruler can be effectively used in a dark environment.
3) Turning the auxiliary ruler to the folded state (carrying)
As shown in figure 1, when the leveling rod needs to be carried or retracted after the measurement is finished, the first auxiliary ruler 2-1 in the unfolded state is rotated to be flatly attached to the main ruler surface through the reverse rotation 8, the second auxiliary ruler 2-2 is also rotated to be flatly attached to the main ruler surface through the reverse rotation 8, the first hook 6-2 on the rope buckle is connected with the first small hole 9-1 on the first end protective sleeve 4-1 of the first auxiliary ruler 2-1, and the second hook 6-3 is connected with the second small hole 9-2 on the second end protective sleeve 4-2 of the second auxiliary ruler 2-2, so that the stable leveling rod whole with the reduced volume is formed. The measuring staff can carry and place properly by using the handle 5 at the side of the main ruler 1.
Claims (8)
1. The utility model provides a night vision levelling rod of portable folding auto-lock which characterized in that: the self-locking mechanism comprises a main ruler (1), an auxiliary ruler, a self-locking revolute pair and a rope buckle, wherein the auxiliary ruler comprises a first auxiliary ruler (2-1) and a second auxiliary ruler (2-2), and the self-locking revolute pair comprises a first self-locking revolute pair (3-1) and a second self-locking revolute pair (3-2); the first auxiliary ruler (2-1) and the second auxiliary ruler (2-2) are respectively connected to the two ends of the main ruler (1) through a first self-locking revolute pair (3-1) and a second self-locking revolute pair (3-2); the ends of the two auxiliary rulers in the folded state are connected through a rope buckle, and the rope buckle mainly comprises an elastic rope (6-1), a first hook (6-2) and a second hook (6-3).
2. The portable folding self-locking night vision leveling rod of claim 1, wherein: the first self-locking revolute pair (3-1) and the second self-locking revolute pair (3-2) are respectively arranged at the upper end and the lower end of the main scale (1) in the height direction.
3. The portable folding self-locking night vision leveling rod of claim 1, wherein: the auxiliary ruler and the main ruler in the unfolded state are parallel and are in a straight line and fixed; the folding auxiliary ruler is attached to the surface of the main ruler.
4. The portable folding self-locking night vision leveling rod of claim 1, wherein: the width of the auxiliary ruler is smaller than that of the main ruler (1); the sum of the heights of the two auxiliary rulers is smaller than the height of the main ruler (1), a space is reserved between the two auxiliary rulers in a folded state, and the rope buckle is arranged at the space.
5. The portable folding self-locking night vision leveling rod of claim 1, wherein: a first end part protective sleeve (4-1) is arranged at the end part of the first auxiliary ruler (2-1), a first small hole (9-1) is formed in the first end part protective sleeve (4-1), a second end part protective sleeve (4-2) is arranged at the end part of the second auxiliary ruler (2-2), and a second small hole (9-2) is formed in the second end part protective sleeve (4-2); the first hook (6-2) and the second hook (6-3) are respectively connected with the first small hole (9-1) and the second small hole (9-2); the end protective sleeve is made of rubber materials.
6. The portable folding self-locking night vision leveling rod of claim 1, wherein: handles (5) are arranged on two sides of the main scale (1).
7. The portable folding self-locking night vision leveling rod of claim 1, wherein: the scales of the main scale (1) and the auxiliary scale are marked by reflecting materials, and the scales are covered with a fluorescent full-prism reflecting film which is a prism type retro-reflecting material finished by a full-prism structure.
8. The method of using the portable folding self-locking night vision leveling rod of claim 1, comprising the steps of:
1) unfolding the secondary ruler from the folded state: the first auxiliary ruler (2-1) in a folded state is unfolded to be parallel to the main ruler (1) through positive rotation, the second auxiliary ruler (2-2) is also unfolded to be parallel to the main ruler (1) through positive rotation, and the first auxiliary ruler and the second auxiliary ruler are screwed down through the self-locking rotation side effect, so that a measuring leveling ruler with a certain height is formed;
2) the leveling rod in an unfolded state is used for measuring, the scales of the main rod and the auxiliary rod are marked by using reflecting materials, and the scales are covered with a fluorescent full-prism reflecting film, so that the ruler can be normally used in a dark environment;
3) turning the auxiliary ruler to a folded state: after measurement is finished, when the leveling rod is carried or retracted, the first auxiliary rod (2-1) in an unfolded state is rotated to be attached to the main rod surface through contrarotation, the second auxiliary rod (2-2) is also rotated to be attached to the main rod surface through contrarotation, the first hook (6-2) on the rope fastener is connected with the first small hole (9-1) on the first end protective sleeve (4-1) of the first auxiliary rod (2-1), and the second hook (6-3) is connected with the second small hole (9-2) on the second end protective sleeve (4-2) of the second auxiliary rod (2-2) to form a stable leveling rod whole body with a reduced volume; the measuring staff can carry and place properly by using the handle (5) at the side part of the main ruler (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061798.6A CN111156962A (en) | 2020-01-20 | 2020-01-20 | Portable folding self-locking night vision leveling rod and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061798.6A CN111156962A (en) | 2020-01-20 | 2020-01-20 | Portable folding self-locking night vision leveling rod and use method |
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| CN111156962A true CN111156962A (en) | 2020-05-15 |
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| CN202010061798.6A Pending CN111156962A (en) | 2020-01-20 | 2020-01-20 | Portable folding self-locking night vision leveling rod and use method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201989505U (en) * | 2011-01-29 | 2011-09-28 | 赵建跃 | Ruler |
| CN202368175U (en) * | 2011-11-17 | 2012-08-08 | 董心怡 | Lengthening ruler |
| CN203084295U (en) * | 2013-03-15 | 2013-07-24 | 宁波亚太光学仪器有限公司 | Folding-ruler magnifying glass |
| CN103499182A (en) * | 2013-09-30 | 2014-01-08 | 合肥晶弘电器有限公司 | Refrigerator storage shelf and refrigerator |
| CN104776771A (en) * | 2015-03-24 | 2015-07-15 | 苏州新区华士达工程塑胶有限公司 | Novel plastic ruler |
| CN208458590U (en) * | 2018-07-20 | 2019-02-01 | 广东鸿翔工程检测咨询有限公司 | A kind of bridge pavement foldable multifunctional ruler |
| CN211234380U (en) * | 2020-01-20 | 2020-08-11 | 杭州临安中民筑友智造科技有限公司 | Portable folding self-locking night vision leveling rod |
-
2020
- 2020-01-20 CN CN202010061798.6A patent/CN111156962A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201989505U (en) * | 2011-01-29 | 2011-09-28 | 赵建跃 | Ruler |
| CN202368175U (en) * | 2011-11-17 | 2012-08-08 | 董心怡 | Lengthening ruler |
| CN203084295U (en) * | 2013-03-15 | 2013-07-24 | 宁波亚太光学仪器有限公司 | Folding-ruler magnifying glass |
| CN103499182A (en) * | 2013-09-30 | 2014-01-08 | 合肥晶弘电器有限公司 | Refrigerator storage shelf and refrigerator |
| CN104776771A (en) * | 2015-03-24 | 2015-07-15 | 苏州新区华士达工程塑胶有限公司 | Novel plastic ruler |
| CN208458590U (en) * | 2018-07-20 | 2019-02-01 | 广东鸿翔工程检测咨询有限公司 | A kind of bridge pavement foldable multifunctional ruler |
| CN211234380U (en) * | 2020-01-20 | 2020-08-11 | 杭州临安中民筑友智造科技有限公司 | Portable folding self-locking night vision leveling rod |
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