Land surveying equipment

Abstract

The invention discloses a land surveying device, belonging to the field of surveying tools, characterized in that it comprises a frame, a rope roller, a measuring rope, a terminal and a connecting block; the measuring rope is wound on the rope roller, and the rope roller is installed on the frame; the measuring rope is a hollow tubular structure, and the rope core passes through the measuring rope; the end of the measuring rope is provided with a terminal; the front end of the terminal is provided with two closable clamp arms; the measuring rope is formed by connecting multiple sections of rope end to end, and two adjacent sections of the measuring rope are connected by a connecting block; the connecting block comprises a front part of the connecting block and a rear part of the connecting block, and a buckle is provided in the connecting block; when the front part of the connecting block and the rear part of the connecting block are connected, the two can be fixed by the buckle structure to prevent them from being separated; after the buckle is opened, the front part of the connecting block and the rear part of the connecting block are separated. Compared with the prior art, it has the characteristic of being able to be operated by one person.

Description

Technical Field

[0001] The invention relates to a measuring device, in particular to a measuring device suitable for land measurement. Background Art

[0002] The conventional way of land measurement is to fix the end of the tape measure at one end of the measured length, then pull the tape measure to the other end of the measured length and read the value. The end of the tape measure is usually fixed manually, that is, one person holds the end of the tape measure and fixes it, and the other person pulls the main part of the tape measure and reads the value. This measurement method requires two people to operate, so it is more labor-intensive. Summary of the invention

[0003] The technical task of the present invention is to provide a land surveying device in view of the above deficiencies in the prior art.

[0004] The technical solution of the present invention to solve its technical problem is: a land surveying device, characterized in that it includes a frame, a rope roller, a measuring rope, an end and a connecting block; the measuring rope is marked with scales, the measuring rope is wound around the rope roller, the rope roller is installed on the frame, and the rope roller can rotate on the frame; a crank is provided on the measuring frame, and the rope roller can be driven to rotate by the crank; the measuring rope is a hollow tubular structure, the measuring rope passes through a rope core, and the rope core can be freely pulled back and forth in the measuring rope; an end is provided at the end of the measuring rope; the front end of the end is provided with two openable and closeable clamp arms; the middle position of the two clamp arms is hinged; in the natural state, the two clamp arms are in a closed state; the two clamp arms are in a closed state. The arms are closed to form a ring structure; the front end of the rope core is located between the rear ends of the two clamp arms, and the movement of the clamp arms is restricted by the action of the front end of the rope core, so that the two clamp arms cannot be opened; when the rope core is pulled backward, the front end of the rope core is separated from the rear ends of the two clamp arms, so that the two clamp arms can be opened and closed freely; the measuring rope is composed of multiple sections of rope connected end to end, and two adjacent sections of measuring rope are connected by a connecting block; the connecting block includes a front part of the connecting block and a rear part of the connecting block, and a buckle is provided in the connecting block; when the front part of the connecting block and the rear part of the connecting block are connected, the buckle structure can fix the two to prevent them from being separated; after opening the buckle, the front part of the connecting block and the rear part of the connecting block are separated.

[0005] The width and height dimensions of the rear shell of the above-mentioned connecting block are greater than those of the front shell of the connecting block; the front shell of the connecting block can be inserted into the rear shell of the connecting block; the buckle is a spring sheet structure, the rear end of the buckle is fixed in the rear of the connecting block, and a buckle button structure is provided on the buckle, and a hole adapted to the buckle button structure is provided on the rear shell of the connecting block, and the buckle button structure extends out of the hole; a buckle hook body is provided at the front end of the buckle, and a shell hook body adapted to the buckle hook body is provided on the rear edge of the front shell of the connecting block, and the buckle hook body and the shell hook body can hook each other, thereby fixing the buckle to the front shell of the connecting block; when the buckle button is pressed downward, the buckle is bent inward, and after bending, the buckle hook body and the shell hook body are separated, thereby enabling the front of the connecting block and the rear of the connecting block to be separated.

[0006] A safety device is arranged in the above-mentioned connecting block, and the safety device is a spring sheet structure. The front end of the safety device is fixed to the front part of the connecting block, and a safety button is arranged on the safety device, and the safety button passes through the hole of the front shell of the connecting block and is exposed to the outside; wherein the safety button and the buckle button are located on different sides of the connecting block; the rear end of the safety device is located between the front end of the buckle and the rope core, and the front end of the buckle cannot be bent inward by the action of the rear end of the safety device, thereby avoiding the buckle from being triggered by mistake; when the safety button is pressed, the safety device is bent, and the rear end position of the safety device is moved away from the original position, so that the buckle device is bent.

[0007] The frame is provided with an automatic disengagement device capable of disengaging the connection blocks; the main part of the automatic disengagement device is a shell structure with openings at both ends, and the measuring rope passes through the shell structure. The cavity surrounded by the shell structure includes a lower cavity and an upper cavity, wherein the width and height of the lower cavity are sufficient to allow the connection block to pass freely through the lower cavity without triggering the buttons; the width and height of the upper cavity are smaller, and when the connection block is located at the upper cavity, the side wall of the upper cavity will squeeze the connection block so that the buckle button and the safety button can be pressed at the same time; the upper cavity includes a front upper part and a rear upper part, wherein the width of the front upper part is sufficient to accommodate only the front part of the connection block but not the rear part of the connection block, and the width of the rear upper part is sufficient to accommodate the rear part of the connection block; a spring plate is provided in the rear upper part of the cavity, and when the device is in natural state, the spring plate is inclined in a direction from the front lower to the rear upper, and the front edge of the spring plate is located at the connection between the upper cavity and the lower cavity; a lifting plate is provided at the lower cavity, and a pull rod is fixed on the lifting plate, and the pull rod is connected to the pull rod handle.

[0008] The frame is provided with a gun for firing gunpowder nails.

[0009] The cavity structure surrounded by the clamp arms is narrow in front and wide in the back, wherein the width of the rear portion of the cavity can accommodate the nail cap at the upper end of the nail to pass through, and the width of the front portion of the cavity is sufficient to allow the main body of the nail to pass through, but not the nail cap.

[0010] An elastic stopper is arranged on the clamp arm, and a part of the elastic stopper extends out of the cavity, and the extended part is located at the connection between the front and rear parts of the cavity.

[0011] The end head also includes a spring, and the front end of the rope core applies a forward elastic force through the action of the spring.

[0012] Compared with the prior art, the beneficial effects of the present invention are: only one person is needed to carry out the measurement work, and the end head can be conveniently and remotely separated from the nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the rope roller of the present invention.

[0015] Figure 3 It is a schematic diagram of the terminal structure of the present invention.

[0016] Figure 4 It is a schematic diagram of the internal structure of the terminal of the present invention.

[0017] Figure 5 It is a schematic diagram of the connection block structure of the present invention.

[0018] Figure 6 It is a schematic diagram of the internal structure of the connection block of the present invention.

[0019] Figure 7 It is a schematic diagram of the connecting block buckle and the safety device.

[0020] Figure 8 It is a schematic diagram of the connecting block insurance structure.

[0021] Fig. 9 It is a schematic structural diagram of the automatic disengagement device of the present invention.

[0022] Fig.10 It is a schematic diagram of the internal structure of the automatic disengagement device. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figures 1 to 10As shown, the present invention includes a frame 3, a rope roller 2, a measuring rope 5, an end 4 and a connecting block 8. The measuring rope 5 is marked with a scale, and the distance is measured by the measuring rope 5. The measuring rope 5 is wound around the rope roller 2, and the rope roller 2 is installed on the frame 3. The rope roller 2 can rotate on the frame 3, and the release and recovery of the measuring rope 5 are achieved by the rotation of the rope roller 2. The measuring frame is provided with a crank, and the rope roller 2 can be driven to rotate by the crank, so as to achieve the recovery of the measuring rope 5. The frame 3 is provided with a handle 1 for easy handholding.

[0025] The measuring rope 5 is a hollow tubular structure, and a rope core 12 is passed through the measuring rope 5. The rope core 12 can be freely pulled forward and backward in the measuring rope 5, and the movement of the end 4 of the measuring rope 5 can be controlled by the rope core 12. The end of the measuring rope 5 is provided with a terminal 4. Figure 3 , 4 As shown, the front end of the end 4 is provided with two openable and closeable clamp arms 10. The middle positions of the two clamp arms 10 are hinged. In the natural state, the two clamp arms 10 are in a closed state. The two clamp arms 10 form a ring structure after closing. When measuring, the nail 11 is nailed to the starting point of the measurement, and the ring structure formed by the clamp arms 10 is put on the nail 11, so as to play a simple fixing role; when the two clamp arms 10 are opened, the end 4 can be detached from the nail 11. In this embodiment, the cavity structure surrounded by the two clamp arms 10 is narrow in front and wide in the back, wherein the width of the rear part of the cavity can accommodate the nail cap at the upper end of the nail 11 to pass through, and the width of the front part of the cavity is sufficient to allow the main part of the nail 11 to pass through, but the nail cap part cannot pass through. When in use, first nail the nail 11 on the ground, then insert the nail 11 from the upper end through the rear of the cavity, and then pull the end 4 backward so that the nail 11 is located at the front of the cavity, thereby preventing the end 4 from falling off the nail 11 to a certain extent. Furthermore, an elastic stopper 9 can be provided on the clamp arm 10, and the elastic stopper 9 can be a spring sheet or a rigid structure connected to an elastic element such as a spring or a torsion spring. A portion of the elastic stopper 9 extends out of the cavity, and the extended portion is located at the connection between the front and rear of the cavity. When the nail 11 moves from the rear to the front of the cavity, the elastic stopper 9 can be pushed open, and the action of the elastic stopper 9 can limit the nail 11 from moving from the front to the rear of the cavity, thereby further preventing the end 4 from falling off the nail 11.

[0026] In this embodiment, the terminal 4 includes a housing, wherein one clamp arm 10 is a part of the housing structure. The front end of the rope core 12 is located between the rear ends of the two clamp arms 10, and the movement of the clamp arms 10 is limited by the action of the front end of the rope core 12, so that the two clamp arms 10 cannot be opened; when the rope core 12 is pulled backward, the front end of the rope core 12 is separated from the rear ends of the two clamp arms 10, so that the two clamp arms 10 can be opened and closed freely. The terminal 4 also includes a spring 24, and the front end of the rope core 12 applies a forward elastic force through the action of the spring 24.

[0027] In actual use, after the measuring rope 5 is wound on the rope roller 2, the inner wall of the measuring rope 5 will exert a certain pressure on the rope core 12, forcing the rope core 12 to bend synchronously with the measuring rope 5 so as to be wound on the rope roller 2. Since the length of the measuring rope 5 is often tens of meters or even hundreds of meters, the pressure on the rope core 12 will form a large static friction resistance after a certain accumulation, and this resistance will prevent the rope core 12 from being pulled freely in the measuring rope 5. In order to overcome this technical problem, it is necessary to set a plurality of connecting blocks 8 on the measuring rope 5.

[0028] For the convenience of description, the direction toward the axis is defined as the inner side, and the direction away from the axis is defined as the outer side. The rope core 12 is a complete rope. The measuring rope 5 is formed by connecting multiple rope sections end to end, and two adjacent measuring rope sections 5 are connected by a connecting block 8. The connecting block 8 includes a connecting block front portion 13 and a connecting block rear portion 16, and a buckle 18 is provided in the connecting block 8. When the connecting block front portion 13 and the connecting block rear portion 16 are connected, the buckle 18 structure can fix the two to prevent them from being separated. After opening the buckle 18, the connecting block front portion 13 and the connecting block rear portion 16 are separated. After separation, the rope core 12 can be pulled from the connecting block 8 position, so that the clamp arm 10 can be opened and the end 4 can be separated from the nail 11. The width and height dimensions of the shell of the connecting block rear portion 16 are greater than the width and height dimensions of the shell of the connecting block front portion 13. The shell of the connecting block front portion 13 can be inserted into the shell of the connecting block rear portion 16. The buckle 18 structure is a spring sheet structure, and its main body is located at the rear part 16 of the connection block. The rear end of the buckle 18 is fixed in the rear part 16 of the connection block, and a buckle button 15 structure is provided on the buckle 18. A hole adapted to the buckle button 15 structure is provided on the shell of the rear part 16 of the connection block, and the buckle button 15 structure extends out of the hole. The buckle button 15 structure can be an independent structure fixed on the buckle 18, or a structure integrated with the buckle 18, or can be formed by bending the buckle 18 structure. A buckle hook body 25 is provided at the front end of the buckle 18, and a shell hook body 26 adapted to the buckle hook body 25 is provided on the rear edge of the shell of the front part 13 of the connection block. The buckle hook body 25 and the shell hook body 26 can hook each other, so that the buckle 18 and the shell of the front part 13 of the connection block can be fixed. When the buckle button 15 is pressed downward, the buckle 18 is bent inward, and after bending, the buckle hook body 25 and the shell hook body 26 are separated, so that the connection block front part 13 and the connection block rear part 16 can be separated.

[0029] During the land measurement process, since the land surface is uneven and there are stones or other debris, in order to prevent the connection block buckle button 15 from being squeezed by stones and other debris and causing false triggering, a safety device 17 needs to be provided, such as Figure 7 , 8As shown, the safety device 17 is a spring sheet structure, the front end of the safety device 17 is fixed to the front part 13 of the connection block, and a safety button 14 is provided on the safety device 17, and the safety button 14 passes through the hole of the shell of the front part 13 of the connection block and is exposed to the outside. The safety button 14 and the buckle button 15 are located on different sides of the connection block 8, so as to avoid the two buttons being triggered by mistake at the same time. The rear end of the safety device 17 is located between the front end of the buckle 18 and the rope core 12. The front end of the buckle 18 cannot be bent inward by the action of the rear end of the safety device 17, so as to avoid the buckle 18 being triggered by mistake. When the safety button 14 is pressed, the safety device 17 is bent, and the rear end position of the safety device 17 moves away from the original position, so that the buckle 18 device can be bent.

[0030] For ease of operation, the frame 3 is provided with an automatic disengagement device 6 capable of disengaging the connection block 8. Fig. 9 , 10 As shown, the main part of the automatic disengagement device 6 is a shell structure 21 with openings at both ends, and the measuring rope 5 passes through the shell structure 21. The cavity surrounded by the shell structure includes a lower cavity and an upper cavity, wherein the width and height of the lower cavity are sufficient to allow the connection block 8 to freely pass through the lower cavity without triggering the buttons; the width and height of the upper cavity are smaller, and when the connection block 8 is located at the upper cavity, the side wall of the upper cavity will squeeze the connection block 8 so that the buckle button 15 and the safety button 14 can be pressed at the same time. The upper cavity includes a front upper part and a rear upper part, wherein the width of the front upper part is sufficient to accommodate only the front part 13 of the connection block but not the rear part 16 of the connection block, and the width of the rear upper part is sufficient to accommodate the rear part 16 of the connection block. When the connecting block 8 is located at the upper part of the cavity, the connecting blocks 8 are squeezed and separated from each other, and the front part 13 of the connecting block is able to pass through the upper part of the cavity, and the rear part 16 of the connecting block is stuck in the upper rear part of the cavity. The frame 3 is pulled, and the rear part 16 of the connecting block is pulled backward through the automatic disengagement device 6 at the same time, and the rope core 12 is pulled at the same time, so that the end 4 is separated from the nail 11.

[0031] A spring plate 23 is provided in the upper rear part of the cavity. When the device is installed naturally, the spring plate 23 is tilted from the front to the upper rear. The front edge of the spring plate 23 is located at the connection between the upper and lower parts of the cavity. The upper part of the cavity can be blocked by the front edge, so that the connecting block 8 passes through the lower part of the cavity in the natural state, thereby preventing the buttons from being triggered by mistake. A lifting plate 22 is provided in the lower part of the cavity. A pull rod 20 is fixed on the lifting plate 22. The pull rod 20 is connected to the pull rod handle 19. The lifting plate 22 can be lifted by the pull rod handle 19. When the lifting plate 22 is lifted, the connecting block 8 is pushed to the upper part of the cavity by the lifting plate 22. The spring plate 23 is squeezed upward to a horizontal state by the action of the connecting block 8. The buttons of the connecting block 8 are pressed by the squeezing action of the side walls of the upper part of the cavity, thereby separating the front part 13 of the connecting block from the rear part 16 of the connecting block.

[0032] For ease of operation, the nail 11 can be a powder nail, with propellant on the upper end of the nail 11, which is fired and nailed to the ground by a special gun. The frame 3 is provided with a gun 7 matching the powder nail, so that the nail 11 can be easily fixed to the ground.

[0033] The operation process is as follows: when using, first use the gun 7 to push the gunpowder nail against one end of the measuring point on the ground, then put the clamp arm 10 of the end head 4 on the nail 11, then move the hand-held frame 3 to the other end of the measuring point, straighten the measuring rope 5, and then read the distance value and record it. Then lift the lifting rod through the pull rod handle 19 to make the measuring rope 5 pass through the upper part of the cavity of the automatic disengagement device 6, and then continue to pull the measuring rope 5 outward until the connecting block 8 on the measuring rope 5 enters the upper part of the cavity, so that the connecting block 8 is separated, and continue to pull to separate the end head 4 from the nail 11, and then retract the measuring rope 5.

[0034] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes to the present invention without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A land surveying device, characterized in that: The invention comprises a frame, a rope roller, a measuring rope, an end and a connecting block; the measuring rope is marked with scales, the measuring rope is wound around the rope roller, the rope roller is installed on the frame, and the rope roller can rotate on the frame; a crank is provided on the measuring frame, and the rope roller can be driven to rotate by the crank; the measuring rope is a hollow tubular structure, the measuring rope passes through a rope core, and the rope core can be pulled freely forward and backward in the measuring rope; an end is provided at the end of the measuring rope; the front end of the end is provided with two openable and closable clamp arms; the middle position of the two clamp arms is hinged; in the natural state, the two clamp arms are in a closed state; the two clamp arms form an annular structure after being closed; the front end of the rope core is located between the rear ends of the two clamp arms, and the movement of the clamp arms is restricted by the action of the front end of the rope core, so that the two clamp arms cannot be opened; when the rope core is pulled backward, the front end of the rope core is detached from the rear ends of the two clamp arms, so that the two clamp arms can be freely opened and closed; the measuring rope is formed by connecting a plurality of rope sections end to end, and two adjacent measuring rope sections are connected by a connecting block; the connecting block comprises a connecting The front of the block and the rear of the connecting block, a buckle is provided in the connecting block; when the front of the connecting block and the rear of the connecting block are connected, the buckle structure can fix the two to prevent them from being separated; after the buckle is opened, the front of the connecting block and the rear of the connecting block are separated; the width and height dimensions of the rear shell of the connecting block are greater than the width and height dimensions of the front shell of the connecting block; the front shell of the connecting block can be inserted into the rear shell of the connecting block; the buckle is a spring sheet structure, the rear end of the buckle is fixed in the rear of the connecting block, and a buckle button structure is provided on the buckle, and the connecting block A hole adapted to the snap button structure is provided on the rear shell, and the snap button structure extends out of the hole; a snap hook body is provided at the front end of the snap, and a shell hook body adapted to the snap hook body is provided on the rear edge of the front shell of the connecting block, and the snap hook body and the shell hook body can hook each other, thereby fixing the snap and the front shell of the connecting block; when the snap button is pressed downward, the snap is bent inwardly, and after bending, the snap hook body and the shell hook body are separated, thereby enabling the front of the connecting block and the rear of the connecting block to be separated.

2. The land measurement device according to claim 1, characterized in that: A safety device is arranged in the connecting block, and the safety device is a spring sheet structure. The front end of the safety device is fixed to the front part of the connecting block, and a safety button is arranged on the safety device, and the safety button passes through the hole of the front shell of the connecting block and is exposed to the outside; wherein the safety button and the buckle button are located on different sides of the connecting block; the rear end of the safety device is located between the front end of the buckle and the rope core, and the front end of the buckle cannot be bent inward by the action of the rear end of the safety device, thereby preventing the buckle from being triggered by mistake; when the safety button is pressed, the safety device is bent, and the rear end position of the safety device is moved away from the original position, thereby allowing the buckle device to bend.

3. The land surveying device according to claim 1 or 2, characterized in that: The frame is provided with an automatic disengagement device capable of disengaging the connecting blocks; the main part of the automatic disengagement device is a shell structure with openings at both ends, and the measuring rope passes through the shell structure. The cavity surrounded by the shell structure includes a lower cavity and an upper cavity, wherein the width and height of the lower cavity are sufficient for the connecting block to pass freely through the lower cavity without triggering each button; the width and height of the upper cavity are smaller, and when the connecting block is located at the upper cavity, the side wall of the upper cavity will squeeze the connecting block so that the buckle button and the safety button can be pressed at the same time; the upper cavity includes a front upper part and a rear upper part, wherein the width of the front upper part is sufficient to accommodate only the front part of the connecting block but not the rear part of the connecting block, and the width of the rear upper part is sufficient to accommodate the rear part of the connecting block; a spring plate is provided in the rear upper part of the cavity, and when the device is naturally installed, the spring plate is inclined in a direction from the front lower to the rear upper, and the front edge of the spring plate is located at the connection between the upper cavity and the lower cavity; a lifting plate is provided at the lower cavity, and a pull rod is fixed on the lifting plate, and the pull rod is connected to the pull rod handle.

4. The land measurement device according to claim 1, characterized in that: The frame is provided with a shooting gun for firing gunpowder nails.

5. The land measurement device according to claim 1, characterized in that: The cavity structure surrounded by the clamp arms is narrow in front and wide in the back, wherein the width of the rear portion of the cavity can accommodate the nail cap at the upper end of the nail to pass through, and the width of the front portion of the cavity is sufficient to allow the main body of the nail to pass through, but not the nail cap.

6. The land measurement device according to claim 5, characterized in that: An elastic stopper is arranged on the clamp arm, and a part of the elastic stopper extends out of the cavity, and the extended part is located at the connection between the front and rear parts of the cavity.

7. The land measurement device according to claim 1, characterized in that: The end head also includes a spring, and the front end of the rope core applies a forward elastic force through the action of the spring.

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