Extension type vertical ranging rod

Abstract

The invention discloses an extension type vertical ranging rod, and relates to the technical field of measuring tools, the extension type vertical ranging rod comprises a measuring tape body, the measuring tape body comprises a shell, a tape strip coiled in the shell and a self-locking mechanism used for locking the tape strip, and the extension type vertical ranging rod is characterized by further comprising a telescopic groove plate horizontally arranged at a tape strip outlet of the shell; the telescopic groove plate forms a semi-surrounding structure for the side edge of the ruler strip, one end of the telescopic groove plate far away from the measuring tape body is provided with a vertically upward bending part, the ruler strip penetrates through the inner side of the telescopic groove plate in a sliding mode and slides upwards along the bending part, and the extending end of the ruler strip is provided with a ruler hook used for hooking the top end of the bending part. The measuring tape body is provided with an unwinding mechanism which is used for rotating and folding the tape strip to the inner side of the housing. According to the invention, the tape can be sent to the depth of a narrow space, the depth height and width can be accurately measured, and the problem that an existing steel tape is difficult to accurately measure the vertical distance in the space is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring tools, and in particular to an extended vertical distance measuring ruler. Background Art

[0002] During the metallurgical furnace construction process, accurately measuring the size of the joint is key to the brick cutting process. However, for typical joints with a height of less than 100mm and a depth of more than 450mm, conventional steel tape measures are simply unable to measure the height dimension at the deepest point, as it is difficult to extend an arm into such a narrow space. An ordinary steel tape measure can only be used to support the furnace shell at the deepest point in the space and then forcibly bend it. This can only roughly measure the dimension of the deepest point close to the furnace shell surface. However, there is a filler layer between the refractory bricks and the furnace shell of the metallurgical furnace, and there is generally a distance of 20 to 60mm between the deepest part of the joint and the furnace shell. Therefore, the existing steel tape measure cannot measure the height and width dimensions at the required depth. Summary of the Invention

[0003] The object of the present invention is to provide an extended vertical distance measuring ruler, which aims to solve the problem in the above-mentioned background technology that the existing steel tape measures are difficult to accurately measure the vertical distance in a space.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an extended vertical distance measuring tape, comprising a tape measure body, the tape measure body comprising a shell, a scale strip coiled inside the shell, and a self-locking mechanism for locking the scale strip, characterized in that it also comprises a telescopic slot plate horizontally arranged at the scale strip outlet of the shell, the telescopic slot plate forming a semi-enclosed structure for the side of the scale strip, the telescopic slot plate being provided with a vertically upward 90° bend at one end away from the tape measure body, the scale strip slidingly passing through the inner side of the telescopic slot plate and sliding upward along the bend, the protruding end of the scale strip being provided with a hook for hooking the top end of the bend, and the tape measure body being provided with a rewinding mechanism for rotating the scale strip and retracting it to the inner side of the shell.

[0005] Furthermore, the unwinding mechanism includes a rotary handle, a lock column and a coil spring. The rotary handle is rotatably connected to the inner wall of the shell. The end of the rotary handle located on the inner side of the shell is connected to the lock column. The end of the lock column away from the rotary handle is provided with a slot. One end of the coil spring is connected to the lock column through the slot, and the fixed end of the ruler is connected to the other end of the coil spring.

[0006] Furthermore, the self-locking mechanism includes a brake block pivotally connected near the outlet of the scale bar, the brake block is located on the upper part of the scale bar, the upper part of the brake block is exposed from the side wall of the shell to form a button part, and the lower part of the brake block forms a downwardly extending pressing part that can directly interfere with the upper surface of the scale bar. An elastic reset structure is provided between the brake block and the shell to allow the brake block to deflect so that the pressing part always presses the scale bar.

[0007] Furthermore, the elastic reset structure includes a spring seat and a support spring. The spring seat is arranged inside the shell. A spring column is protruding below the button part of the brake block. The support spring is located on the upper part of the pivot of the brake block and one end is arranged in the spring seat, and the other end is sleeved on the spring column.

[0008] Furthermore, the ruler is a steel tape measure, and the root of the ruler hook is in close contact with the zero scale line of the ruler.

[0009] The present invention has the following beneficial effects: The present invention provides an extendable vertical distance measuring ruler. Through the design of the telescopic slot plate and the bending part, the ruler can be sent to the deep of the narrow space, and the height and width dimensions at the deep depth can be accurately measured, which effectively solves the problem that the existing steel tape measure is difficult to accurately measure the vertical distance in the space. By rotating the handle, the ruler can be flexibly controlled to be sent out and retracted, and the actual size at the required depth can be measured, rather than just the rough size close to the furnace shell surface. The measurement result is more in line with actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the structure of the unwinding mechanism in the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the telescopic slot plate in the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the unwinding mechanism in the present invention; In the figure: 1. Housing; 2. Ruler bar; 3. Telescopic slot plate; 4. Ruler hook; 5. Rotary handle; 6. Locking column; 7. Coil spring; 8. Brake block; 9. Spring seat; 10. Support spring; 11. Limiting ring. DETAILED DESCRIPTION

[0011] like Figures 1 to 4As shown, an extendable vertical distance measuring ruler includes a tape measure body, which includes a shell 1, a ruler 2 wound inside the shell 1 and a self-locking mechanism for locking the ruler 2, and also includes a multi-level nested telescopic slot plate 3 horizontally arranged at the ruler outlet of the shell 1; the telescopic slot plate 3 includes a plurality of slot plates arranged step by step, the slot plate includes a bottom plate and two groups of limit side plates arranged on both sides of the bottom plate, the limit side plates are shaped like an arc following the side of the tape measure, and the upper and lower gaps are large enough to allow the tape measure to pass through, and the telescopic slot plate 3 forms a semi-enclosed structure on the side of the ruler 2, providing good protection for the ruler. Good guiding effect makes the ruler bar remain stable during the extension and retraction process, and is not easy to deviate or shake. The distance between the two sets of limiting side plates is adapted to the width of the ruler bar 2; a vertical upward bending portion is provided at one end of the telescopic slot plate 3 away from the tape measure body, and the transition section arc between the bending portion and the telescopic slot plate 3 is 90° and the radius is π / 3cm. The ruler bar 2 slides through the inner side of the telescopic slot plate 3 and slides upward along the bending portion. A ruler hook 4 is provided at the protruding end of the ruler bar 2 for hooking the top of the bending portion, and a reeling mechanism is provided on the tape measure body for rotating and retracting the ruler bar 2 to the inner side of the shell.

[0012] The unwinding mechanism includes a rotary handle 5, a lock column 6 and a coil spring 7. The rotary handle 5 is rotatably connected to the inner wall of the shell 1. The end of the rotary handle 5 located on the inner side of the shell is connected to the lock column 6. A slot is provided at the end of the lock column 6 away from the rotary handle 5. One end of the coil spring 7 is connected to the lock column 6 through the slot, and the fixed end of the ruler 2 is connected to the other end of the coil spring 7.

[0013] The self-locking mechanism includes a brake block 8 pivotally connected near the outlet of the ruler bar. The brake block 8 is located on the upper part of the ruler bar 2. The upper part of the brake block 8 is exposed from the side wall of the shell 1 to form a button part. The lower part of the brake block forms a downwardly extending pressing part that can directly interfere with the upper surface of the ruler bar 2. An elastic reset structure is provided between the brake block 8 and the shell 1 to allow the brake block to deflect so that the pressing part always presses the ruler bar.

[0014] The elastic reset structure includes a spring seat 9 and a support spring 10. The spring seat 9 is arranged inside the housing 1. A spring column is protruding below the button part of the brake block 8. The support spring 10 is located on the upper part of the pivot of the brake block 8 and one end is arranged in the spring seat 9, and the other end is sleeved on the spring column.

[0015] The ruler bar 2 is a steel tape measure, and the root of the ruler hook 4 is close to the zero scale line of the ruler bar 2, which is convenient for accurately reading data during measurement and improves the accuracy of measurement.

[0016] A limiting ring 11 is provided on the inner wall of the housing 1 for limiting the maximum expansion diameter of the coil spring 7 and the ruler 2. The diameter of the limiting ring 11 is slightly larger than the maximum diameter of the winding coil when the tape measure is retracted, and the limiting ring 11 and the rotating handle 5 are concentrically arranged.

[0017] The specific operation process of the present invention is as follows: When in use, the surveyor holds the handle 5 on the right side of the shell 1 with his right hand to prevent it from rotating, and pulls out the telescopic slot plate 3 with his left hand to make it extend forward. At this time, the self-locking mechanism ensures that the ruler 2 only extends and does not retract, and the front end of the ruler 2 hooks the top of the bent part through the ruler hook 4. When the telescopic slot plate 3 is stretched to the required depth, the right hand releases the handle 5, and the handle 5 will automatically rotate counterclockwise to release the torque of the coil spring 7. After releasing the torque, the operator adjusts the device to a horizontal level using a bubble level.

[0018] Hold the handle 5 and rotate it counterclockwise. The handle 5 will drive the lock column 6 to rotate. Since the torque of the coil spring 7 has been released and is in a free state, and it cannot expand due to the restriction of the limit ring 11 in the shell, the coil spring 7 will drive the ruler 2 to rotate. At this time, the ruler 2 is sent out, and the ruler 2 slides forward along the telescopic slot plate 3 and bends upward 90° through the bending part. After touching the obstacle, the handle 5 is stopped. At this time, the reading is taken at the highest point of the bending part. The sum of the obtained reading, the height of the bending part and the thickness of the ruler hook 4 can directly determine the precise height dimension of the fixed depth of the narrow space; when retracting, just press the button part of the brake block 8, the pressing part lifts and releases the self-locking function, and rotate the handle 5 clockwise to retract the ruler 2. Similarly, turn the tape measure body 90° and follow the above steps to measure the height to measure the width.

Claims

1. An extended vertical distance measuring tape, comprising a tape measure body, wherein the tape measure body comprises a housing (1), a tape strip (2) wound inside the housing (1), and a self-locking mechanism for locking the tape strip (2), characterized in that: The invention also includes a telescopic slot plate (3) horizontally arranged at the outlet of the ruler strip of the shell (1), wherein the telescopic slot plate (3) forms a semi-enclosed structure for the side of the ruler strip (2), and a 90° bend portion vertically upward is provided at one end of the telescopic slot plate (3) away from the tape measure body, and the ruler strip (2) is slidably passed through the inner side of the telescopic slot plate (3) and slides upward along the bend portion, and a hook (4) for hooking the top end of the bend portion is provided at the protruding end of the ruler strip (2), and a reeling mechanism for rotating and retracting the ruler strip (2) to the inner side of the shell is provided on the tape measure body.

2. The distance ruler according to claim 1, characterized in that The unwinding mechanism comprises a rotary handle (5), a lock column (6) and a coil spring (7); the rotary handle (5) is rotatably connected to the inner wall of the housing (1); one end of the rotary handle (5) located on the inner side of the housing is connected to the lock column (6); an end of the lock column (6) away from the rotary handle (5) is provided with a slot; one end of the coil spring (7) is sleeved on the lock column (6) through the slot; and the fixed end of the ruler (2) is connected to the other end of the coil spring (7).

3. The distance ruler according to claim 1, characterized in that The self-locking mechanism includes a brake block (8) pivotally connected near the outlet of the ruler bar, the brake block (8) is located on the upper part of the ruler bar (2), the upper part of the brake block (8) is exposed from the side wall of the shell (1) to form a button part, and the lower part of the brake block forms a downwardly extending pressing part that can directly contact and cooperate with the upper surface of the ruler bar (2), and an elastic reset structure is provided between the brake block (8) and the shell (1) to allow the brake block to deflect so that the pressing part always presses the ruler bar.

4. The distance measuring ruler according to claim 3, characterized in that: The elastic reset structure comprises a spring seat (9) and a support spring (10), wherein the spring seat (9) is arranged inside the housing (1), a spring column is protruding below the button portion of the brake block (8), and the support spring (10) is located above the pivot of the brake block (8) with one end arranged in the spring seat (9) and the other end sleeved on the spring column.

5. The distance ruler according to claim 1, characterized in that: The ruler strip (2) is a steel tape measure, and the root of the ruler hook (4) is in close contact with the zero scale line of the ruler strip (2).

6. The distance ruler according to claim 1, characterized in that A limiting ring (11) is provided on the inner wall of the housing (1) for limiting the maximum expansion diameter of the coil spring (7) and the tape measure (2), and the diameter of the limiting ring (11) is slightly larger than the maximum diameter of the coil when the tape measure is retracted.

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