CN202470927U

CN202470927U - Land surveying tapeline

Info

Publication number: CN202470927U
Application number: CN2012200805670U
Authority: CN
Inventors: 王文波
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-06
Filing date: 2012-03-06
Publication date: 2012-10-03
Anticipated expiration: 2022-03-06

Abstract

The utility model relates to a land surveying tapeline. The tapeline comprises a box body provided with an opening and a rotating roller rotationally arranged in the box body, wherein the box body is internally provided with a rotatable driving wheel; a graduated rope of which one end is fixed on the rotating roller and the other end extends outwards, bypasses the driving wheel and finally extends out of the box body is wound on the rotating roller; the box body is internally provided with a rotary encoder capable of synchronously tracking the rotation of the driving wheel; the signal output end of the rotary encoder is eclectically connected with an IC (Integrated Circuit) control chip; the IC control chip is electrically connected with a zero clearing reset button and a display screen embedded in the wall of the box body; the driving wheel comprises a main driving wheel and an auxiliary driving wheel, and the graduated rope finally extends out of the box body through an outlet after bypassing the main driving wheel and the auxiliary driving wheel in sequence; a graduated rope locating mechanism is arranged outside the box body; and the graduated rope locating mechanism comprises a plurality of auxiliary locating rings sleeved on the graduated rope and a main locating ring fixedly connected to the outward extending end of the graduated rope. The land surveying tapeline is simple in structure, ingenious in design, high in measurement precision, wide in measuring range and very suitable for land surveying.

Description

A kind of land surveying is used tape measure

Technical field

The utility model belongs to the measurement apparatus, belongs to a kind of land surveying specifically and uses tape measure.

Background technology

At present, existing tape measure generally comprises box body, and rotating transfer roller is housed in the box body; Be wound with the chi band of band scale on the transfer roller, box wall is provided with the opening that supplies chi to bring into out, during use; The chi band is pulled out in box body; The scale that reads on the chi band carries out linear measure longimetry, the return wind spring is housed on the transfer roller can carries out rolling, the rolling of motor drives transfer roller also can be installed in box body or crank be installed on transfer roller be carried out manual rolling.

When carrying out land surveying, mainly there is following defective in tape measure of the prior art: 1) mostly land surveying is outdoor study, and environment is relatively poor and need dilatory chi band, and the scale after long-time the use on the chi band is easy to wear, influences reading; 2) owing to need have scale on the chi band, so will the chi band be made flat long ribbon shape, consume material and increase the weight of whole tape measure increases the burden of survey crew, and in addition, the long-time back chi band that uses is yielding and then influence measuring accuracy; 3) in land surveying, need measure one section tens meters distance sometimes, the range of existing tape measure is difficult to reach, although some tape measure can reach this range, it is difficult to also guarantee that the chi band is indeformable in long range measurements, measurement result is unreliable; 4) when measuring, need measure not distance between a plurality of points on the same straight line sometimes, in the time of perhaps need measuring the length of the camber line that certain radian is arranged, use existing tape measure to need survey crew constantly to locate and run, and measuring accuracy also be difficult to guarantee; 5) utilize scale on the human eye range estimation chi band, precision is difficult to guarantee, and some in particular cases the scale on the chi band be blocked, survey crew then can't reading.

The utility model content

The technical matters that the utility model will solve provides a kind of land surveying and uses tape measure, and this tape measure utilization is not carried out count measurement with the chi of scale rope line of engagement speed sensing device, and range is big, precision is high, simple in structure, easy to use.

For solving the problems of the technologies described above; The utility model comprises box body that is provided with opening and the transfer roller that is rotatably installed in the box body; Its design feature is that rotating power wheel is installed in the said box body; Be wound with an end on the transfer roller and be fixed on the chi rope that the other end stretches out and walks around power wheel and finally stretch out box body on the transfer roller; Be provided with the rotary encoder that can follow the tracks of synchronously the rotation of power wheel in the box body, the signal output part of rotary encoder is electrically connected with the IC control chip, is electrically connected with the display screen and the zero clearing SR that are inlaid on the box wall on the IC control chip.

Said power wheel comprises that being installed in main driving wheel and the auxiliary driving located near the exit position in the box body side by side takes turns, and said chi rope is walked around main driving wheel and auxiliary driving wheel successively and finally stretched out box body through outlet.

Said box body is provided with chi rope detent mechanism outward.

Said chi rope detent mechanism comprises a plurality of secondary locating ring that is enclosed within on the chi rope and the main locating ring that is fixed on the chi rope overhanging end.

The internal diameter of said secondary locating ring is less than the external diameter of main locating ring.

The beneficial effect of the utility model is: twine flexible chi rope on the transfer roller, the chi rope is walked around power wheel and can be driven power wheel and rotates, when pulling out the chi rope; Power wheel rotates, and rotary encoder is followed the tracks of power wheel synchronously and write down number of turns information, and the IC control chip calculates the length of pulling out the chi rope and is shown to the operator through display screen according to the number of turns of power wheel; The zero clearing SR can be provided with the starting position at any time, and the tape measure of this kind structure is simple in structure, electronic counting is measured accurately, and it is very long that the chi rope is gone up no scale and the chi light reelable length of restricting; Range can reach tens meters even rice up to a hundred easily; Stretching chi rope can be avoided the distortion of chi rope, the air line distance between guaranteeing at 2, in addition; Adopt flexible chi rope can measure the distance on the road surface that certain radian is arranged, design is practical more; Two power wheels that employing is arranged side by side, the chi rope is walked around this two power wheels successively, can prevent effectively that on the one hand the chi rope from skidding on the wheel face of power wheel, when pulling chi rope, more helps to smooth out with the fingers along the chi rope on the other hand to prevent the distortion of chi rope; Detent mechanism is used to pull out chi rope and initial measurement position, location; Detent mechanism adopts main locating ring and a plurality of secondary locating ring; Adopt locating ring can use nails such as nail, branch or chock easily on the ground; Main locating ring handled easily person pulls out the chi rope, and a plurality of secondary locating rings can be located between a plurality of positions on the non-same straight line, perhaps when the air line distance of measuring one section very long; Can segmentation position, can also position one section curved distance easily to prevent chi rope deformation effect measurement result; The internal diameter of secondary locating ring is less than the external diameter of main locating ring, and promptly master's locating ring can drive withdrawal together with secondary locating ring when the chi rope shrinks, and avoids secondary locating ring to come off.The utility model is simple in structure, deft design, and measuring accuracy height and range are big, use when very being fit to land surveying.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is done further explain:

Fig. 1 is the structural representation of the utility model.

Embodiment

With reference to accompanying drawing; It is to comprise box body 1 that is provided with opening 11 and the transfer roller 2 that is rotatably installed in the box body that the land surveying of the utility model uses a kind of embodiment of tape measure, and rotating power wheel 3 is installed in the box body 1, is wound with an end on the transfer roller 2 and is fixed on the chi rope 4 that the other end stretches out and walks around power wheel 3 and finally stretch out box body 1 on the transfer roller 2; Wherein, Also be provided with rolling-up mechanism on the transfer roller 2, can adopt return wind spring automatic winding, hand crank also can be set carry out manual rolling; The rolling-up mechanism of above-mentioned return wind spring and hand crank is prior art, repeats no more at this.Be provided with the rotary encoder 5 that can follow the tracks of synchronously the rotation of power wheel 3 in the box body 1, the signal output part of rotary encoder 5 is electrically connected with IC control chip 6, is electrically connected with the display screen 7 and zero clearing SR 8 that are inlaid on box body 1 wall on the IC control chip 6.The number of turns information of rotary encoder 5 synchronous recording power wheels 3, IC control chip 6 calculates the length of pulling out chi rope 4 and is shown to the operator through display screen 7 according to the number of turns of power wheel 3.Zero clearing SR 8 can be reset the starting position with the counting zero clearing.Counting circuit in the IC the control chip 6 and control circuit of display screen 7 and zero clearing SR 8 is the custom circuit design repeats no more at this.

The effect of power wheel 3 is through the rotation of himself length that chi rope 4 is drawn out to be reacted to rotary encoder 5; Wherein a kind of preferred construction is: power wheel 3 comprises that being installed in box body 1 interior main driving wheel 31 near outlet 11 positions side by side takes turns 32 with auxiliary driving, and chi rope 4 is walked around main driving wheel 31 and auxiliary driving wheel 32 successively and finally stretched out box body 1 through exporting 11.As shown in the figure, the right half cycle of main driving wheel 31 and the left half cycle of auxiliary driving wheel 32 are tightened and walked around successively to chi rope 4 in box body 1.The swiveling wheel of main driving wheel 31 driven in rotation scramblers 5 rotates, and can adopt the gearing mesh structure.As shown in the figure, two rolling small sheave convenient rulers ropes 4 can correspondence in the outlet 11 of box body 1 be set skid off.

The box body 1 outer chi rope detent mechanism that is provided with.Chi rope detent mechanism is used for fixing chi rope 4 so that the shape of initial measurement position, location and positioning rule rope 4, and wherein a kind of preferred construction is: chi rope detent mechanism comprises and is enclosed within a plurality of secondary locating ring 42 on the chi rope 4 and is fixed in the chi main locating ring 41 on 4 overhanging ends of restricting.The internal diameter of secondary locating ring 42 is less than the external diameter of main locating ring 41.Main locating ring 41 all adopts ring-type with secondary locating ring 42, has made things convenient for the operator to spur chi rope 4 on the one hand, can use nail, branch or timber wedge etc. with the locating ring nail on the ground on the other hand, uses very convenient.

Claims

1. a land surveying is used tape measure; Comprise the box body (1) that is provided with opening (11) and be rotatably installed in the transfer roller (2) in the box body; It is characterized in that being equipped with in the said box body (1) rotating power wheel (3); Be wound with an end on the transfer roller (2) and be fixed on the chi rope (4) that the last other end of transfer roller (2) stretches out and walks around power wheel (3) and finally stretch out box body (1); Be provided with the rotary encoder (5) that to follow the tracks of synchronously the rotation of power wheel (3) in the box body (1); The signal output part of rotary encoder (5) is electrically connected with IC control chip (6), is electrically connected with the display screen (7) and the zero clearing SR (8) that are inlaid on box body (1) wall on the IC control chip (6).

2. land surveying as claimed in claim 1 is used tape measure; It is characterized in that said power wheel (3) comprises that being installed in interior main driving wheel (31) and the auxiliary driving near outlet (11) position of box body (1) side by side takes turns (32), main driving wheel (31) walked around successively by said chi rope (4) and auxiliary driving wheel (32) also finally stretches out box body (1) through exporting (11).

3. according to claim 1 or claim 2 land surveying is used tape measure, it is characterized in that the outer chi rope detent mechanism that is provided with of said box body (1).

4. land surveying as claimed in claim 3 is used tape measure, it is characterized in that said chi rope detent mechanism comprises a plurality of secondary locating ring (42) that is enclosed within on the chi rope (4) and is fixed in the chi main locating ring (41) on (4) overhanging end of restricting.

5. land surveying as claimed in claim 4 is used tape measure, it is characterized in that the external diameter of the internal diameter of said secondary locating ring (42) less than main locating ring (41).