CN104807565A - Force measuring device for steel tape special spring and measuring method thereof - Google Patents

Abstract

A special spring force measuring device for a steel tape and its measuring method, wherein the special spring force measuring device for a steel tape is composed of a fixing part and a measuring part respectively arranged on both sides of an object to be measured, and the fixing part includes a fixing fixture located at the zero scale end of the tape , the measuring part is located at the reading end of the tape measure, including a guide tube that is tightly pressed against the object to be measured, a slider that is clamped on the upper part of the guide tube and slides along the tensioning direction of the tape measure, and a gear shaft that passes through the guide tube and is provided along the bottom surface of the slider The gear rack engages the running gear, the spring connecting the end of the guide tube close to the measured object to the slider, and the measuring fixture fixedly connected to the top surface of the slider, and the steel tape passes through the measuring fixture and the fixing fixture to be straightened Fixed, the guide tube is provided with a force-measuring scale for reading tension. The invention conveniently fixes the steel tape, accurately determines the tensile force on the steel tape, is convenient to operate, reduces the number of operators, has low labor intensity, ensures measurement accuracy, and improves measurement efficiency.

Description

A special spring force measuring device for steel tape and its measuring method

technical field

The invention relates to a special spring force measuring device and a measuring method thereof which are convenient for determining the tensile force on a steel tape.

Background technique

At present, in the measurement of bridge prefabricated components, tube-type dynamometers are used to measure the tensile force of the steel tape. When the length of the measured component exceeds 5 meters, the specified tension must be applied to the steel tape to determine the length value. At present, the tension is applied manually by stretching the two ends of the steel tape. The labor intensity of the operator is high, and the tension cannot be stably controlled. At the same time, because the steel tape is thin and the surface is smooth, the tension is loose. These factors make it difficult to align the zero scale position of the steel tape, and the error of the measurement data is relatively large.

Contents of the invention

The purpose of the present invention is to provide a special spring force measuring device for a steel tape and its measuring method, to solve the technical problems that the position of the zero line of the steel tape is not easy to align and the error of the measurement data is relatively large.

To achieve the above object, the present invention adopts the following technical solutions:

A special spring force-measuring device for a steel tape, which enables the steel tape to be flattened on the surface of a measured object, and is characterized in that: the special spring force-measuring device for a steel tape is composed of a fixed part and a measuring part respectively arranged on both sides of the measured object , the fixing part includes a fixing fixture located at the zero scale end of the tape measure, and the measuring part is located at the reading end of the tape measure, including a guide tube that is tightly pressed against the object to be measured, a slider that is clamped on the upper part of the guide tube and slides along the tensioning direction of the tape measure, and teeth The shaft passes through the guide tube and the rack provided along the bottom surface of the slider engages the running gear, the spring connects the end of the guide tube close to the measured object to the slider, and the measuring fixture is fixedly connected to the top surface of the slider. The steel tape is passed through the measuring jig and the fixing jig to be straightened and fixed, and the guide tube is provided with a force-measuring scale for reading tension.

The slider can be a special-shaped slider, which includes an L-shaped clamp leg and a top plate connecting the two clamp legs. A rack is provided at the bottom of the L-shaped clamp leg, and a measuring fixture is provided on the top plate.

The rocking bar can be arranged on one side of the gear, and is connected with the gear through a gear shaft.

The outer wall of the guide tube is provided with a handle for fixing the special spring force measuring device for the steel tape, and the handle is arranged at a position parallel to the gear.

A measuring method of a special spring force measuring device for a steel tape, characterized in that the force measuring steps are as follows:

Step 1: When measuring the length, first fix the zero scale end of the steel tape with a fixing fixture, and fix the end of the steel tape with the protruding part of the lower clip of the fixed end fixture so that the zero scale line is in line with the end of the measured object alignment;

Step 2: The operator holds the handle of the measuring part of the special spring force measuring device for steel tape with his hand, puts the end of the guide tube of the measuring part against the object to be measured, and measures the force of the special spring for steel tape by the object to be measured. The measuring part of the device is stuck; the steel tape is fixed with the measuring fixture;

Step 3: Shake the rocker counterclockwise, so that the gears on both sides drive the sliders on both sides to move in the direction of the tension spring, and force the steel tape through the measuring fixture. At the same time, the operator watches the force measuring scale of the special spring force measuring device for the steel tape , when the scale value reaches the required tension of the steel tape, the length value of the measured object corresponding to the steel tape can be read out.

Compared with the prior art, the present invention has the following characteristics and beneficial effects:

The invention conveniently fixes the steel tape, accurately determines the tensile force on the steel tape, is convenient to operate, reduces the number of operators, has low labor intensity, ensures measurement accuracy, and improves measurement efficiency. The invention uses a fixing fixture to fix the end of the steel tape, thereby fixing the position of the zero reticle, so that the position of the zero reticle is aligned with the edge of the measured object. Moreover, at the stretched end, the measuring part of the spring force measuring device can be fixed to accurately determine the tension and ensure the accuracy of measurement.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is the cooperating use figure of the present invention and steel tape.

Fig. 2 is a side view of a spring dynamometer dedicated to a steel tape measure.

Fig. 3 is a front view of a spring dynamometer dedicated to a steel tape measure.

Fig. 4 is a top view of a spring dynamometer dedicated to a steel tape measure.

Figure 5 is a side view of the steel tape end (zero scale) clamp.

Figure 6 is a front view of the steel tape end (zero scale) clamp.

Figure 7 is a top view of the steel tape end (zero scale) clamp.

Reference signs: 1-rocker, 2-slider, 2.1-rack, 3-gear, 4-measurement end knob handwheel, 5-measurement end bolt rod, 6-measurement end clamp upper clip, 7-measurement Lower clip of end fixture, 8-guide tube, 9-pinion shaft, 10-handle, 11-spring, 12-force measuring scale, 13-upper clip of fixed end fixture, 14-lower clip of fixed end fixture, 15- Fixed end knob handwheel, 16-fixed end bolt rod, 17-steel tape measure, 18-object to be measured.

Detailed ways

Referring to the embodiment shown in Fig. 1-Fig. 7, this kind of special spring force measuring device for steel tape makes the steel tape 17 be flattened on the surface of the measured object 18. The fixing part and the measuring part on both sides consist of a fixing fixture located at the zero scale end of the tape measure. Slider 2 that slides along the tensioning direction of the tape measure, pinion shaft 9 passes through guide tube 8 and gear rack 2.1 provided along the bottom surface of slider 2 engages with walking gear 3, guides the end of guide tube 8 close to the object 18 to be measured and slides The spring 11 connected to the block 2 and the measuring fixture fixedly connected on the top surface of the slide block 2, the steel tape measure 17 passes through the measuring fixture and the fixing fixture to straighten and fix, and the guide tube 8 is provided with a device for reading the tension. Force scale 12.

The slider 2 is a special-shaped slider, including an L-shaped clamp leg and a top plate connecting the two clamp legs. The bottom of the L-shaped clamp leg is provided with a rack 2.1, and the top plate is provided with a measuring fixture. The measuring end fixture of the fixture The surfaces of the upper clip and the lower clip of the measuring end are provided with non-slip rubber pads, and the steel tape is fixed by the anti-skid effect of the rubber pad to control the slippage of the steel tape.

The rocker 1 is arranged on one side of the gear 3 and is connected with the gear 3 through a pinion 9 .

The outer wall of the guide tube 8 is provided with a handle 10 for fixing a special spring force measuring device for a steel tape, and the handle 10 is arranged at a position parallel to the gear 3 .

A measuring method of a special spring force measuring device for a steel tape, the measuring steps are as follows:

Step 1: When measuring the length, first fix the zero scale end of the steel tape 17 with a fixing fixture, and fix the end of the steel tape 17 with the protruding part of the lower clip 14 of the fixed end fixture, so that the zero scale line is in line with the measured object 18 ends aligned;

Step 2: The operator holds the handle 10 of the measuring part of the special spring force measuring device for the steel tape with his hand, puts the end of the guide tube 8 of the measuring part against the measured object 18, and relies on the measured object 18 to hold the steel tape The measuring part of the special spring force measuring device is stuck; the steel tape measure 17 is fixed with a measuring fixture;

Step 3: Shake the rocker 1 counterclockwise, so that the gears 3 on both sides drive the sliders 2 on both sides to move in the direction of the tension spring 11, and force the steel tape 17 through the measuring fixture, and at the same time, the operator watches the special spring for the steel tape to measure the force The force-measuring scale 12 of the device, when the scale value reaches the required tension of the steel tape, the length value of the measured object 18 corresponding to the steel tape 17 can be read out.

Claims (5)

1. A special spring force measuring device for a steel tape, which enables the steel tape (17) to be flattened on the surface of the object to be measured (18). The fixed part on the side of the tape is composed of a fixed part and a measuring part. The fixed part includes a fixing fixture located at the zero scale end of the tape measure. 8) The slider (2) on the upper part slides along the tensioning direction of the tape, and the gear shaft (9) passes through the guide tube (8) and engages with the gear (3 ), the spring (11) connecting the end of the guide tube (8) close to the measured object (18) to the slider (2), and the measuring fixture fixedly connected to the top surface of the slider (2), the steel tape ( 17) Pass through the measuring jig and the fixing jig to straighten and fix, and the guide tube (8) is provided with a force-measuring scale (12) for reading the pulling force. 2. The special spring force measuring device for steel tape according to claim 1, characterized in that: the slider (2) is a special-shaped slider, including an L-shaped clamp leg and a top plate connecting the two clamp legs, and the L-shaped clamp leg A rack (2.1) is provided at the bottom of the clamp leg, and a measuring fixture is provided on the top plate. 3. The special spring force measuring device for steel tape according to claim 1, characterized in that: the rocker (1) is arranged on one side of the gear (3), and is connected with the gear (3) through the gear shaft (9) . 4. The special spring force measuring device for steel tape according to claim 1, characterized in that: the outer wall of the guide tube (8) is provided with a handle (10) for fixing the special spring force measuring device for steel tape, the handle (10 ) is set at a position parallel to the gear (3). 5. A measuring method of a special spring force measuring device for a steel tape as claimed in claims 1 to 5, characterized in that the force measuring steps are as follows: Step 1: When measuring the length, first fix the zero scale end of the steel tape (17) with the fixing fixture, and fix the end of the steel tape (17) with the protruding part of the lower clip (14) of the fixed end fixture so that The zero scale line is aligned with the end of the measured object (18); Step 2: The operator holds the handle (10) of the measuring part of the special spring force measuring device for steel tape with his hand, and puts the end of the guide tube (8) of the measuring part against the measured object (18), relying on the measured object (18). The measuring object (18) clamps the measuring part of the special spring force measuring device for the steel tape; fix the steel tape (17) with the measuring fixture; Step 3: Shake the rocker (1) counterclockwise, so that the gears (3) on both sides drive the sliders (2) on both sides to move in the direction of the tension spring (11), and force the steel tape (17) through the measuring fixture, At the same time, the operator looks at the force measuring scale (12) of the special spring force measuring device for the steel tape, and when the scale value reaches the required tension of the steel tape, the value of the length of the measured object (18) corresponding to the steel tape (17) can be read out .