KR101471404B1 - Height adjustment apparatus for staff in geodetic surveying instrument - Google Patents

Abstract

The present invention relating to a height adjusting apparatus for level surveying includes a cylindrical lower ruler (10) of which the top is open and the bottom is closed, having graduations (11) on the front thereof; and a cylindrical upper ruler (21) of which the top, bottom, and rear are open, having graduations (21) on the front thereof. As the upper ruler (20) is inserted into the lower ruler (10) by sliding, the height can be adjusted. The height adjusting device also includes: a rotary buffering landing means (30) provided in the lower part of the lower ruler (10); and a height adjusting means (40) for adjusting the height of a staff consisting of the lower ruler (10) and the upper ruler (20).

Description

[0001] The present invention relates to a height adjustment apparatus for a geodetic surveying instrument,

The present invention relates to a leveling apparatus for leveling, and more particularly, to a leveling apparatus for leveling, and more particularly, to a leveling apparatus for leveling, You can easily adjust the height of the scales. You can adjust the height of the scales one by one or by several spaces, so you can perform the height adjustment more efficiently. You can adjust the height by adjusting the height of the spinal cord by stepping on your feet without using your hands. This makes it easier to protect the staf from external vibrations or shocks that occur in the vicinity of the staff during leveling, as well as when the spinal cord changes the orientation of the target in place. It is possible to orient the level machine of the machine number to the horizontal direction, It relates to a leveling adjuster for which the accurate measurement is possible.

Generally, geodetic surveying should be done first for various civil engineering design and architectural design. Geodetic surveying is the measurement of horizontal distance, elevation difference and direction, determining the location of each measurement point, displaying it in figures or numerical values, and staking out all the activities in the field.

The level of the geodetic survey is the measurement of the height difference between two points using the staff and the leveler. The accuracy is 5mm × S1 / 2 for the level 2 survey (where S is the one way distance, km.) is required.

13 is a view for explaining a method of measuring the level by using the staff 1 and a leveling instrument 2 such as a leveling machine.

In the first step, the spinal cord is placed on a ground reference point a0 at which the altitude is known, and the machine number is measured at a first observation point (b1) (2) Read the scale of staff (1).

In the second step, the spinal cord is moved to the first point a1 and the staff 1 is set up. The machine number changes the direction of the measuring instrument 2, such as a leveling machine, at the observation point b1, Read the star point scale at the first point via the measuring instrument (2). Here, the altitude of the first point is obtained from the altitude of the difference between the scale read from the ground reference point a0 and the first point a1 and the altitude of the ground reference point.

In the third step, the machine number moves to the second observation point b2 behind the first point a1 and the table spinal cord turns the staff 1 in place (first point) The machine number reads the star scale scale of the first point a1 from the second observation point b2 to the leveling machine.

In the fourth step, the spinal cord moves to the second point a2 to set up the stiff 1 and the machine number reads the stiff scale at the second point a2 at the second point b2. Here, the elevation of the second point is obtained from the difference in scale between the first point a1 and the second point a2 read from the second observation point b2.

In this way, while the staff (1) and the leveling machine (2) are continuously moved, the direction of the level machine at each point and each observation point is switched to read the scale, Obtain altitude.

At this time, the elevation difference of the first and second observation points (b1, b2) on which the surveying instrument (2) such as the reference point (a0) or the first and second points (a1, a2) The height of the staff must be adjusted according to the height of the staff. As shown in FIG. 14, the conventional staff is composed of two upper and lower chairs 1a and 2b, In order to adjust the height, the knot screw (not shown) holding the knob 1 with one hand and the lower chuck 1a and the upper chuck 1b are loosened, While holding the upper chuck 1b while holding the upper chuck 1b with the other hand and adjusting the height of the knuckle 1 and tightening the engaging screw for fixing the lower chuck 1a and the upper chuck 1b, The upper and lower chokes 1a and 1b must be combined in the height-adjusted state, Only it is magnified as there is a problem that the height adjustment process of the staff bother.

Also, as a prior art, a "leveling elevator for leveling ", which can adjust the elevation of a staff by using a motor and a screw, is disclosed in Korean Patent Registration No. 10-1349383 (registered on April 1, 2014) have.

However, the above-mentioned prior art leveling staff control device uses the power of the motor, so that relatively heavy parts such as a battery for supplying power to the motor as well as the motor are required, which causes the total weight of the staff to be very heavy, The handling of the staff by the spinal cord becomes very inconvenient.

Therefore, it is required to develop a technique which can easily and effectively adjust the height while the total weight of the staff is light and the handling by the spinal cord is easy.

In addition, in the case of a conventional star, when a staff member standing on the ground in a geodetic surveying process is subjected to vibration or impact around the star, the star is shaken in a process of reading the staff's scale by a level distance, The calibration scale can not be accurately read, resulting in a measurement error.

Also, in the conventional step, in the process of changing the direction of the staff in the third step, the staff should be lifted from the floor to change the direction of the staff and then put the staff back to the original position The spinal cord often fails to accurately place the staff in the original position, resulting in a measurement error.

Therefore, it is required to develop a leveling device for leveling so that the position of the staff is not changed in the process of changing the direction of the staff.

In addition, since the conventional stapler 1 is provided with the grounding member 1c coupled to the lower end of the lower chainring 1a, since the staple 1 is made of steel or synthetic resin, If vibration or impact is applied to the staff from the ground in the process of setting up and surveying, the staff will be shaken and the accuracy of surveying will decrease.

Therefore, it is required to develop a technique for increasing the measurement accuracy by preventing vibration and shock from being shaken by vibration or shock even if vibration or shock is applied to the staff from the ground.

"Leveling Survey" of Korean Patent Registration No. 10-1073942 (Registered on October 10, 2011) "Level Measurement System that Minimizes Error of Geodetic Survey Data", Korea Patent Registration No. 10-1227188 (Registered on Feb. 21, 2013) Korea National Patent Registration No. 10-1233719 (Registered on Mar. 2, 2013) "National level reference point surveying device using image information acquisition in geodetic survey" The "leveling lowering device for leveling" of Korea Patent Registration No. 10-1208592 (registered on November 29, 2012) The "leveling elevator height adjusting device" of Korean Patent Registration No. 10-1349383 (registered on April 1, 2014)

Therefore, it is an object of the present invention to facilitate the handling by the spinal cord of the staple because the total weight of the staple is light because the power is not used and the spinal cord can be easily operated by stepping on the ratchet pawl, It is possible to adjust the height by one or several spaces, so that the height adjustment can be performed more efficiently. Since the table spinal cord can be adjusted by raising the foot without using the hand, the height adjustment becomes easier. When the target is changed in the direction of the target, it is possible to protect the staff from the external vibration or shock generated from the surrounding area. Level measurement that enables precise surveying without measurement errors Intended to provide a low control.

In order to achieve the above-mentioned object, the present invention provides an upper barrel having an upper end and an upper barrel, an upper barrel having an upper barrel and a lower barrel, A rotary cushioning landing means provided at the lower end of the lower chuck frame, the upper chucking base being inserted into the lower chuck and being adjustable in height and height by sliding and retracting; And a height adjusting means for adjusting the height of the staff consisting of the lower chuck and the upper chuck,

The rotary damper landing means includes:

A bearing housing having a coupling piece fixedly coupled to a lower surface of the lower chuck and a bearing receiving part integrally formed on a lower surface of the coupling piece; A bearing in which an out race is press-fitted into the inner peripheral surface of the bearing accommodating portion; A rotary shaft which is press-fitted into the inner race of the bearing and has a spring support portion at a lower end thereof; A cushion spring having an upper end rotatably supported on a spring support portion of the rotary shaft; A casing formed in a cylindrical shape having an opened upper surface and receiving the bearing receiving portion, having a through hole formed in a lower surface thereof and an oil injection hole formed in a peripheral wall thereof; A landing rod formed on an upper end of the spring support portion for supporting the lower end of the buffer spring relatively rotatably and having a landing portion landed on the ground; An oil injected into the casing; A cylindrical nipple body inserted into the oil injection hole of the casing, an opening / closing ball inserted into an outer end of the nipple main body, and a nipple inserted into the inside of the nipple main body to elastically support the opening / Main nipple with spring; And a ring having an inner circumferential portion inserted into a ring groove formed in an outer circumferential surface of the bearing accommodating portion and an outer circumferential portion inserted into a ring groove formed in an inner circumferential surface of the casing so that the casing and the bearing accommodating portion are relatively rotatably connected,

The height adjusting means includes:

A first driving shaft support plate for connecting the rear end of the lower stage fixing plate and a lower fixing plate for connecting the lower fixing plate at a position spaced forward from the first driving shaft support plate, A driving shaft support hole formed at a central portion of the first and second driving shaft support plates and a second driving shaft support plate formed to be elongated left and right from the first and second driving shaft support plates on both sides of the driving shaft support hole A lower bracket having a ratchet pivot support elongated hole, a ratchet spring supporting elongated hole formed at a lower portion of the ratchet pivot support elongated hole, and a ratchet pawl hole formed at both sides of the lower fixed plate;

A pair of left and right upper fixing plates fixed to the upper end of the lower chuck band and extending rearwardly, a first biaxial supporting plate connecting the rear ends of the upper fixing plate, A second bracket cooperating with the upper and lower rear surfaces of the lower chuck to connect the upper and lower brackets to each other, and a vertical bracket provided at a central portion of the first and second bracket support plates;

A driving shaft rotatably supported on a driving shaft support hole of the lower bracket;

A slave shaft rotatably supported on a follower shaft support hole of the upper bracket and extending through the upper rear surface of the lower chuck support into the upper chuck support;

A ratchet wheel fixed to the drive shaft between the first and second drive shaft support plates;

A ratchet operating part inserted between the first and second driving shaft supporting plates and having an inner end formed with a ratchet operating part for operating the ratchet wheel in an ascending direction and a stepped part protruding to the left through the left ratchet port through- A ratchet pawl shaft integrally formed on the front and rear sides of the intermediate portion of the racetrack pole body for upward and rearward movement and rotatably supported by the ratchet pawl supporting slot; A ratchet pawl that is wound around a cheat pole shaft and has one arm inserted and supported in the ratchet spring supporting slot and the other arm is supported on an upper surface of the ratchet operating portion;

A ratchet operating portion is inserted between the first and second driving shaft support plates, and a ratchet operating portion for operating the ratchet wheel in a downward direction is formed at an inner end thereof, and a stepped portion protruding to the right through the right ratchet pole through- A ratchet pawl shaft integrally formed on the front and rear sides of the intermediate portion of the ratchet pawl main body for lowering and being rotatably and laterally movably supported by the ratchet pawl shaft supporting slot; A ratchet pawl wound on a ratchet pawl shaft and having one arm inserted into the ratchet spring supporting slot and the other arm supported by a top surface of the ratchet operating portion;

A drive pulley inserted between the first and second drive shaft support plates and fixed to the drive shaft at a position spaced forward from the ratchet wheel;

A driven pulley fixed to the slave shaft between the first and second slave coaxial support plates;

A drive belt wound in an endless manner between the drive pulley and the driven pulley;

A pinion fixed to the driven shaft within the upper chuck;

A rack fixed to one inner side surface of the upper chuck band and engaged with the pinion; The present invention provides a leveling apparatus for leveling.

According to the present invention, the upper end spring support portion of the landing rod is supported at the lower end of the cushion spring, and the cushion spring is fixed to the bearing housing portion of the bearing housing fixed to the lower end of the lower chuck, Even if vibrations or shocks generated at the periphery of the staff are applied to the landing rod, the vibration and impact of the surroundings are not transmitted to the staff, Since oil is injected into the housing that houses the bearing housing, the rotating shaft, and the buffer spring, it is possible to more effectively absorb the vibration and impact around the landing rod, so that the machine can read the scale accurately .

In addition, according to the present invention, the bearing housing is fixed to the lower end of the lower chuck, the outer race of the bearing is press-fitted into the bearing housing of the bearing housing, and the rotary shaft is press-fitted into the inner race of the bearing And the upper end of the buffer spring is relatively rotatably supported on the rotary shaft. The lower end of the buffer spring is supported so as to be rotatable relative to a landing rod penetrating through the housing. The bearing housing and the housing are rotatably connected by a ring Therefore, the direction of the staff can be changed by turning the staff in the state where the staff is in contact with the ground, so that it is possible to reliably eliminate the measurement error caused by the position change of the staff.

According to the elevation controller for leveling of the present invention, the lower bracket and the upper bracket fixed to the lower and upper ends of the lower chuck, respectively, the ratchet wheel rotatably installed on the lower bracket, and the ratchet pawl for operating the ratchet wheel, A pinion which is rotatably installed on the inner side of the upper chuck band and rotates by receiving the rotational force of the ratchet pawl through the drive pulley, the transmission belt, and the driven pulley; and a height adjustment means including a rack engaged with the pinion, Since the table spinal cord is adjustable in height by operating the ratchet pawl by stepping on the foot without using any additional power, it is possible to adjust the length of the staff as required, It can be handled easily and effortlessly with the ratchet wheel, the drive pulley, the driven pulley, The combination of the electric belt, the pinion, and the rack can be adjusted by a minute interval and a space, so that the height adjustment can be controlled more efficiently.

1 to 12 show a preferred embodiment of a leveling apparatus for leveling according to the present invention,
1 is a front perspective view seen from a top surface direction,
2 is a front perspective view seen from the bottom direction,
3 is a rear perspective view seen from the top surface direction,
4 is a front exploded perspective view seen from the top surface,
5 is a front exploded perspective view seen from the bottom direction,
6 is an exploded bottom perspective view seen from the top surface,
7 is a longitudinal front view showing the rotary damper landing means,
8 is a longitudinal rear view showing the ratchet wheel and the ratchet pawl of the height adjusting means,
9 is a longitudinal rear view showing the driving pulley, the driven pulley and the belt of the height adjusting means,
10 is a longitudinal rear view showing the pinion and the rack of the height adjusting means,
11 is an enlarged cross-sectional view taken along line A-A in Fig. 9,
12 is an enlarged cross-sectional view taken along the line B-B in Fig. 9,
13 is a view for explaining a method of measuring a level using a conventional star and a leveler,
And,
14 is a perspective view of a conventional stiff.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a leveling apparatus for leveling according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description, the through holes through which various bolts or screws are passed, and the fastening holes through which various bolts or screws are fastened are shown in the drawings, but the reference numerals and explanations are omitted.

As shown in FIG. 1, the staff for geodetic survey according to the present embodiment includes an upper chuck 10 and a lower chuck 20 which are slidably and slidably combined and adjustable in height.

The lower chuck 10 located at the lower side is formed thicker than the upper chuck 20 positioned at the upper side.

Scales 11 and 21 are engraved on the upper and lower chucks 10 and 20 so that the machine number can be read by a leveler. The scales (11, 21) are composed of a large scale and a small scale. In the illustrated example, the interval S1 of one square of the large scale is five times larger than the interval S2 of one small interval of the small scale, but it is not necessarily limited thereto.

The upper chuck 20 is formed in an elongated cylindrical shape having upper, lower and rear open sides, and the upper chuck 20 is formed in an upper portion of the lower chuck 10, Is inserted into the chuck (10) and is adjustable in height and height by a slide retracting method.

At the lower end of the lower chuck 10, a rotary damper and landing means 30 is provided.

The rotary cushioning and landing means 30 includes a coupling piece 31a fixedly coupled to a lower surface of the lower chuck 10 and a bearing receiving portion 31b integrally formed on a lower surface of the coupling piece 31a A bearing housing (31); A bearing 32 into which an outer race is press-fitted into the inner peripheral surface of the bearing receiving portion 31b; A rotary shaft 33 which is press-fitted into the inner race of the bearing 32 and has a spring support portion 33a at a lower end thereof; A buffer spring 34 whose upper end is relatively rotatably supported by the spring support portion 33a of the rotary shaft 33; A casing 35 which is formed in a cylindrical shape having an opened upper surface and accommodates the bearing receiving portion 31b, has a through hole 35a formed in a lower surface thereof and an oil injection hole 35b formed in a peripheral wall thereof; A landing rod 36 having a spring support portion 36a for supporting the lower end of the buffer spring 34 relatively rotatably and having a land portion 36b landed on the ground; An oil (37) injected into the casing (35); A cylindrical nipple main body 38a inserted into the oil injection hole 35b of the casing 35, an opening and closing ball 38b inserted into the outer end of the nipple main body 38a, A main nipple 38 having a nipple spring 38c which is inserted into the opening and closing ball 38b to elastically support the opening and closing ball 38b to the outside end of the nipple main body 38a; And an outer peripheral portion is inserted into a ring groove 39b formed in an outer peripheral surface of the bearing receiving portion 31b and formed in an inner peripheral surface of the casing 35 so that the casing 35 and the bearing receiving portion 31b are relatively rotatably connected to each other.

A fixing screw 31c passing through the engaging piece 31a can be fastened to the lower surface of the lower chuck 10 so as to fix the engaging piece 31a to the lower surface of the lower chuck 10. [

The bearing 32 may be configured to press the outer race into the bearing receiving portion 31b to prevent idling, and a radial ball bearing may be used.

The rotary shaft 33 is press-fitted into the inner race of the bearing 32 so as not to rotate.

The cushion spring 34 may use a compression coil spring.

The landing rod 36 is provided with a lower end point (lower end point) to allow the staff to land the ground reference point a0, the first point a1, the second point a2, the third point a3, Shape).

The oil 37 functions to buffer the inside of the casing 35 and also functions to prevent corrosion of the bearings 32, the buffer springs 34 and the rings 39 provided in the casing 35 .

The main use nipple 38 may be a main use nipple that is typical for injecting the oil 37 into the casing 35.

The present invention further includes a height adjusting means (40) for adjusting the height of the staff consisting of the lower chuck (10) and the upper chuck (20).

In the following description, the left and right sides refer to the directions viewed from the rear of the staff.

The height adjusting means 40 includes a lower fixing plate 41a fixed to both sides of the lower end of the lower chuck 10 and extending rearward and a first driving shaft supporting plate 41b connecting the rear ends of the lower fixing plate 41a, A second driving shaft support plate 41c which is connected to the lower stage fixing plate 41a at a position spaced forward from the first driving shaft supporting plate 41b and is in close contact with the lower rear surface of the lower stage 10, A drive shaft support hole 41d formed at the center of the first and second drive shaft support plates 41b and 41c and a second guide shaft 41c extending laterally from the first and second drive shaft support plates 41b and 41c on both sides of the drive shaft support hole 41d The ratchet pivot support long holes 41e and 41f and the ratchet spring supporting long holes 41g and 41h which are elongated in the left and right direction at the lower portions of the ratchet pivot support long holes 41e and 41f, A lower bracket 41 provided with ratchet pole through holes 41i and 41j formed on both sides thereof;

A pair of left and right upper fixing plates 42a fixed to the upper ends of the lower chucks 10 and extending rearwardly, a first biaxial supporting plate 42b connecting the rear ends of the upper fixing plates 42a, A second biaxial support plate 42c which is connected to the upper end fixing plate 42a at a position spaced forward from the subordinate axis support plate 42b and brought into close contact with the upper rear surface of the lower bending table 10, An upper bracket 42 provided with a vertical axis support hole 42d formed at the center of the support plates 42b and 42c;

A drive shaft 43 rotatably supported by a drive shaft support hole 41d of the lower bracket 41;

A driven shaft 44 rotatably supported on a driven shaft support hole 42d of the upper bracket 42 and extending through the upper rear surface of the lower chuck 10 into the upper chuck 20;

A ratchet wheel 45 fixed to the drive shaft 43 between the first and second drive shaft support plates 41b and 41c;

A ratchet operating portion 46b is formed at an inner end of the ratchet wheel supporting plate 41b for moving the ratchet wheel 45 in an ascending direction, A ratchet pawl main body 46a for raising the ratchet pawl portion 46c protruding to the left through the cheek pole through hole 41i and a ratchet pawl main body 46a integrally formed on the front and rear sides of the middle portion of the ratchet pawl main body 46a A ratchet pawl shaft 46d formed on the ratchet pawl support slot 41e so as to be rotatable and horizontally movably supported on the ratchet pawl shaft supporting slot 41e and a ratchet pawl shaft 46d wound on the ratchet pawl shaft 46d, The other arm 46g is inserted into the support slot 41g and has a ratchet pawl 46 having a torsion coil spring 46e supported on the upper surface of the ratchet operation portion 46b.

A ratchet operating portion 47b is formed at an inner end thereof between the first and second driving shaft support plates 41b and 41c to operate the ratchet wheel 45 in a downward direction, A descending ratchet pawl main body 47a in which a pair of leg portions 47c protruding to the right through a cheet pawl through hole 41j is formed,

A ratchet pawl shaft 47d integrally formed on the front and rear sides of the middle portion of the lower ratchet pawl main body 47a and rotatably and laterally movably supported by the ratchet pawl supporting elongated hole 41f, The one arm 47f is wound on the pawl shaft 47d and inserted into the ratchet spring supporting slot 41h and the other arm 47g is wound on the upper surface of the ratchet operating portion 47b. A ratchet pawl 47 for descending;

A drive pulley 48 inserted between the first and second drive shaft support plates 41b and 41c and fixed to the drive shaft 43 at a position spaced forward from the ratchet wheel 45;

A driven pulley 49 fixed to the driven shaft 44 between the first and second longitudinal coaxial support plates 42b and 42c;

A power transmission belt (50) wound in an endless manner between the drive pulley (48) and the driven pulley (49);

A pinion (51) fixed to the driven shaft (44) inside the upper chuck (20);

A rack (52) fixed to the inner side of one side of the upper chuck (20) and engaged with the pinion (51); .

The lower bracket 41 and the upper bracket 42 fasten the fixing screws 41k and 42k penetrating through the lower fixing plate 41a and the upper fixing plate 42a to both the lower ends of the lower chuck 10 and both upper surfaces of the upper chuck 10 So that it can be fixed to the lower end and the upper end of the lower chuck 10.

A cover 53 may be provided to protect the transmission belt 50 exposed between the lower bracket 41 and the upper bracket 42.

The cover 53 is composed of a fixing plate 53a fixed to both sides of the lower chuck 10 and a rear plate 53b connecting the rear end of the fixing plate 53a, The lower chuck 10 can be fixed to the lower chuck 10 by fastening the upper chuck 53c to both sides of the lower chuck 10. [

The lower bracket 41, the upper bracket 42, and the cover 53 may be integrally formed.

A drive shaft through hole 12a and a follower shaft through hole 12b through which the drive shaft 43 and the driven shaft 44 are respectively inserted are formed at the lower and upper ends of the rear surface of the lower chuck 10, respectively.

A radial bearing or a metal bush can be inserted between the drive shaft 43 and the drive shaft support hole 41d and between the follower shaft 44 and the follower shaft support hole 42d.

The racetrack operation portions 46b and 47b of the racetrack 46 for ascending and the ratchet pawl 47 for descending have a top surface formed as a horizontal surface and a bottom surface formed as an inclined surface, The horizontal upper surfaces of the portions 46b and 47b push up the teeth of the ratchet wheel 45. When the ratchet wheel 45 is returned, the lower surface of the ratchet wheel 45 can be restored desirable.

The driving pulley 48, the driven pulley 49 and the power transmission belt 50 may be a conventional flat belt, V-belt or pulley, but it is preferable to use a timing belt / pulley as shown in the drawing.

The rack 52 can be fixed to the upper chuck 20 by fastening a set screw 52a passing through one side of the upper chuck 20 to the rack 52. [

The ratchet wheel 45 rotates by one tooth when the step portion 46c of the ascending ratchet pawl 46 and the descending ratchet pawl 47 are pressed once, The pinion 51 rotated by the driven pulley 49 and the transmission belt 50 rotates by one tooth and the rack 52 is configured to ascend and descend by one tooth, The rack 52 can be configured to ascend by one small scale of the scales 11 and 21 of the lower chuck 10 and the upper chuck 20 when rotating as much as the teeth.

Hereinafter, the operation of the leveling device for level measurement according to the present invention will be described.

The leveling apparatus for leveling according to the present invention is a device for adjusting the height of a leveling apparatus as described in the background of the present invention in such a manner that the table spinal cord grips the staff and the landing rods 36 are connected to the ground reference point a0, The machine is installed on the ground such as the point (a2), the third point (a3), etc., and is used for geodetic surveying by reading the scale of the staff using the leveler.

The upper end spring support portion 36a of the landing rod 36 is supported by the lower end of the cushion spring 34 and the cushion spring 34 is supported by a bearing fixed to the lower end of the lower chuck 10, Is supported by the spring support portion 33a formed at the lower end of the rotary shaft 33 press-fitted into the inner race of the bearing 32 press-fitted into the bearing receiving portion 31b of the housing 31. Therefore, Even when an impact is applied to the landing rod 36, the vibration and shock of the buffering spring 34 are not absorbed by the shock absorber spring 34, The scales 11 and 21 can be accurately read.

Since the oil 37 is injected into the casing 35 accommodating the bearing receiving portion 31b, the rotating shaft 33 and the cushioning spring 34, Can be absorbed more effectively.

On the other hand, as explained in the background of the invention, the number of machines moves to the second observation point b2 after the first point a1 and the table spinal cord turns the staff from its position (first point) In the third step where the machine reads the star scale scale of the first point (a1) from the second observation point (b2) to the level machine when the staff looks at the level machine, Since the staff can be turned by turning the staff (10, 20) while holding the landing rod (36) on the ground of the first point without having to raise the staff and put it back in place, It is possible to reliably exclude the measurement error due to the variation of the position of the probe.

The bearing housing 31 is fixed to the lower end of the lower chuck 10 and the outer race of the bearing 32 is inserted into the bearing receiving portion 31b of the bearing housing 31, The upper end of the buffer spring 34 is relatively rotatably supported on the rotary shaft 33 and the lower end of the buffer spring 34 is connected to the lower end of the buffer ring 34 Since the bearing receiving portion 31b and the casing 35 are rotatably connected to each other by the ring 39 so as to be relatively rotatable relative to the bearing rod 36, (10, 20) can be horizontally rotated.

A main oil hole 35b is formed in the outer peripheral surface of the casing 35 and a main use nipple 38 composed of a nipple main body 38a, an opening and closing ball 38b and a nipple spring 38c is provided in the main oil hole 35b The oil 37 injected into the casing 35 can be replenished.

Further, the height of the entire staff consisting of the lower chuck 10 and the upper chuck 20 can be adjusted by the height adjusting means 40.

At this time, it is not necessary to lift the lower chuck 10 and the upper chuck 20 from the ground, and the spinal cord is held by the lower chuck 10 and the land rods 36 are moved from the ground reference point a0 to the first point a1, It is only necessary to depress the step portions 46c and 47c of the ascending latch ratchet pawls 46 or the descending latch ratchet pawls 47 in a state of being landed on the ground of the points a2 and a3, It is possible to adjust the height and height of the geodetic surveying work.

The ratchet pawls 46 and the descending ratchet pawls 47 are formed so that the ratchet pawl shafts 46d and 47d are engaged with the ratchet pawl supporting elongated holes 41e and 41e formed in the first and second driving shaft supporting plates 41b and 41c, And one arm 46f and 47f of the torsion coil springs 46e and 47e are rotatably supported on the first and second drive shaft support plates 41b and 41c and rotatably supported by the ratchet spring support 41b and 41c formed on the first and second drive shaft support plates 41b and 41c, The ratchet pawls 46 and the descending ratchet pawls 47 are moved in the left and right directions by moving the table spines 46c and 47c by pushing or pulling the table spines 46c and 47c to the left and right, The operating portions 46b and 47b of the ratchet wheel 45 can be engaged with or disengaged from the teeth of the ratchet wheel 45. [

8, the left upright ratchet pawl 46 is pushed to the right so that the operating portion 46b is moved to the right side of the ratchet wheel 45, The right ratchet pawl 47 is pushed to the right so that the operating portion 47b is released from the teeth of the ratchet wheel 45 and then the ratchet pawl The ratchet pawl 46 is rotated counterclockwise so that the operating portion 46b pushes up the teeth of the ratchet wheel 45. As a result, The wheel 45 is rotated clockwise by one tooth.

Conversely, when lowering the upper chuck 20 to lower the height, the right lower ratchet pawl 47 is pushed to the left so that the operating portion 47b is engaged with the teeth of the ratchet wheel 45, The ratchet pawl 46 on the left side is pushed to the left so that the operating portion 46b is released from the teeth of the ratchet wheel 45 and then the table spool is pushed by the stepped portion 47c The lowering ratchet pawl 47 is rotated in the clockwise direction so that the operating portion 47b pushes up the teeth of the ratchet wheel 45 so that the ratchet wheel 45 is rotated by one tooth As shown in FIG.

The drive pulley 48 fixed to the drive shaft 43 rotates together with the ratchet wheel 45 as the ratchet wheel 45 rotates and the rotational force of the drive pulley 48 is transmitted to the drive belt 50 The driven pulley 49 is rotated by the driven pulley 49 and the pinion 51 fixed together with the driven pulley 49 is rotated on the driven shaft 44 and engaged with the pinion 51 The upper chuck 20 having the rack 52 and the rack 52 fixed thereon is raised and lowered so that the height of the staff can be adjusted.

At this time, when the ratchet wheel 46 is stepped on once by the ratchet pawl 46 and the descending ratchet pawl 47 and the ratchet wheel 45 rotates by one tooth, the drive pulley 48, the drive belt 50, The pinion 51 is rotated by one tooth when the pinion 51 rotates by one tooth and the rack 52 is rotated by one tooth so that the lower chuck 10 and the upper chunk 50, (20) so that the height of the staff can be adjusted by small graduations or by intervals.

On the other hand, when the table spinal cord that has been stepped on the step portions 46c, 47c of the ascending latch ratchet pawls 46 and the descending latch ratchet pawls 47 is released, the ratchet pawls 46 for ascending and ratchet pawls (47) is returned by the elastic force of the torsion coil springs (46e, 47e) and waits for the next operation.

Therefore, in adjusting the elevation of the staff, it is possible to raise and lower the elevator by the interval of one minute of the small scale, so that it is possible to efficiently control the elevation according to the situation.

In the case of storing or transporting the staff, the space required for storage and transportation can be minimized by adjusting the length of the top of the lower chuck 10 and the top of the upper chuck 20 to the shortest length.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

10, 20: ladder 30: rotary damper landing means
31: Bearing housing 31b: Bearing housing part
32: bearing 33: rotating shaft
34: buffer spring 35: casing
36: landing rod 37: oil
38: main nipple 39: ring
40: height adjusting means 41: lower bracket
42: upper bracket 43: drive shaft
44: Slave shaft 45: ratchet wheel
46: ratchet pole for ascending 47: ratchet pole for descent
48: drive pulley 49: driven pulley
50: power transmission belt 51: pinion
52: Rack

Claims (1)

A lower chuck 10 having an upper end opened and a lower end closed and having a scale 11 engraved on its front side and an elongated barrel having upper and lower ends and rear openings, The upper chuck 20 is inserted into the lower chuck 10 to adjust the height of the lower chuck 10 and the lower chuck 10 and the rotary chucking landing means 30); And a height adjuster 40 for adjusting the height of the staff consisting of the lower chuck 10 and the upper chuck 20,
The rotary damper landing means (30)
A bearing housing 31 having a coupling piece 31a fixedly coupled to a lower surface of the lower chuck 10 and a bearing receiving portion 31b integrally formed on a lower surface of the coupling piece 31a; A bearing 32 into which an outer race is press-fitted into the inner peripheral surface of the bearing receiving portion 31b; A rotary shaft 33 which is press-fitted into the inner race of the bearing 32 and has a spring support portion 33a at a lower end thereof; A buffer spring 34 whose upper end is relatively rotatably supported by the spring support portion 33a of the rotary shaft 33; A casing 35 which is formed in a cylindrical shape having an opened upper surface and accommodates the bearing receiving portion 31b, has a through hole 35a formed in a lower surface thereof and an oil injection hole 35b formed in a peripheral wall thereof; A landing rod 36 having a spring support portion 36a for supporting the lower end of the buffer spring 34 relatively rotatably and having a land portion 36b landed on the ground; An oil (37) injected into the casing (35); A cylindrical nipple main body 38a inserted into the oil injection hole 35b of the casing 35, an opening and closing ball 38b inserted into the outer end of the nipple main body 38a, A main nipple 38 having a nipple spring 38c which is inserted into the opening and closing ball 38b to elastically support the opening and closing ball 38b to the outside end of the nipple main body 38a; And an outer peripheral portion is inserted into a ring groove 39b formed in an outer peripheral surface of the bearing receiving portion 31b and formed in an inner peripheral surface of the casing 35 so that the casing 35 and the bearing receiving portion 31b are relatively rotatably connected to each other,
The height adjusting means (40)
A first driving shaft supporting plate 41b for connecting the rear end of the lower fixing plate 41a and a lower fixing plate 41a fixed to both sides of the lower end of the lower chuck 10 and extending rearward, A second driving shaft support plate 41c which is in close contact with the lower rear surface of the lower chuck 10 and which connects the lower fixing plate 41a at a position spaced forward from the first and second driving shaft supporting plates 41b and 41c, 41c formed in the left and right sides of the first and second drive shaft support plates 41b, 41c at both sides of the drive shaft support hole 41d, Ratchet spring supporting elongated holes 41g and 41h which are elongated laterally in the lower portion of the ratchet pivot support elongated holes 41e and 41f and ratchet pole through holes 41g and 41h formed on both sides of the lower fixing plate 41a 41i, 41j, respectively;
A pair of left and right upper fixing plates 42a fixed to the upper ends of the lower chucks 10 and extending rearwardly, a first biaxial supporting plate 42b connecting the rear ends of the upper fixing plates 42a, A second biaxial support plate 42c which is connected to the upper end fixing plate 42a at a position spaced forward from the subordinate axis support plate 42b and brought into close contact with the upper rear surface of the lower bending table 10, An upper bracket 42 provided with a vertical axis support hole 42d formed at the center of the support plates 42b and 42c;
A drive shaft 43 rotatably supported by a drive shaft support hole 41d of the lower bracket 41;
A driven shaft 44 rotatably supported on a driven shaft support hole 42d of the upper bracket 42 and extending through the upper rear surface of the lower chuck 10 into the upper chuck 20;
A ratchet wheel 45 fixed to the drive shaft 43 between the first and second drive shaft support plates 41b and 41c;
A ratchet operating portion 46b is formed at an inner end of the ratchet wheel supporting plate 41b for moving the ratchet wheel 45 in an ascending direction, A ratchet pawl main body 46a for raising the ratchet pawl portion 46c protruding to the left through the cheek pole through hole 41i and a ratchet pawl main body 46a integrally formed on the front and rear sides of the middle portion of the ratchet pawl main body 46a A ratchet pawl shaft 46d formed on the ratchet pawl support slot 41e so as to be rotatable and horizontally movably supported on the ratchet pawl shaft supporting slot 41e and a ratchet pawl shaft 46d wound on the ratchet pawl shaft 46d, The other arm 46g is inserted into the support slot 41g and has a ratchet pawl 46 having a torsion coil spring 46e supported on the upper surface of the ratchet operation portion 46b.
A ratchet operating portion 47b is formed at an inner end thereof between the first and second driving shaft support plates 41b and 41c to operate the ratchet wheel 45 in a downward direction, A ratchet pawl main body 47a for descending which forms a pair of leg portions 47c protruding to the right through a cheek pole through hole 41j and a ratchet pawl main body 47b integrally formed on the front and rear sides of the middle portion of the ratchet pawl main body 47a A ratchet pawl shaft 47d formed on the ratchet pawl support slot 41f so as to be rotatable and horizontally movable and a ratchet pawl shaft 47d wound on the ratchet pawl shaft 47d, A lower latch ratchet pawl 47 having a torsion coil spring 47e supported on the upper surface of the ratchet operation portion 47b and inserted into the support slot 41h and the other arm 47g;
A drive pulley 48 inserted between the first and second drive shaft support plates 41b and 41c and fixed to the drive shaft 43 at a position spaced forward from the ratchet wheel 45;
A driven pulley 49 fixed to the driven shaft 44 between the first and second longitudinal coaxial support plates 42b and 42c;
A power transmission belt (50) wound in an endless manner between the drive pulley (48) and the driven pulley (49);
A pinion (51) fixed to the driven shaft (44) inside the upper chuck (20);
A rack (52) fixed to the inner side of one side of the upper chuck (20) and engaged with the pinion (51); And a height measuring device for measuring the level.

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