JPH0894302A - Tape measure - Google Patents

Abstract

PURPOSE: To provide a tape measure which allows a person to identify a tension value when applying a tension on a tape body and easily to carry out the measuring work by himself with high accuracy. CONSTITUTION: A tape measure is so constituted that a tape body made of a steel 1 having a graduation 10 is wound and housed in a case 2. It comprises a tension mechanism 3 wherein pressing pieces 31, 32 are brought into friction contact with the tape body 1 on front and rear faces to become a fixing condition in accordance with a lock operation by an operating lever 30 and a tension spring 33 connected to the pressing pieces 31, 32 allows a tension to be applied to the tape body 1. A reference line 5 is provided on a side face of the pressing piece 31 and a graduation window corresponding to the movement region thereof is provided on the case 2 so that a value of the tension can be indicated therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape measure in which a tape body having a scale for measuring the length on its surface is wound and stored in a case, and in particular, a predetermined tensile force is applied to the tape body. The present invention relates to a tape measure that can be applied.

[0002]

2. Description of the Related Art As is well known, in a tape measure, a tape body having graduations for measuring the length is wound and stored in a case, and the tip of the tape body is attached to one end of a measuring object. The length is measured by locking and pulling this from the case and reading the scale on the surface of the tape body. In measuring the length with this tape measure, it is important to accurately lock the tip of the tape body, that is, it is necessary to set the zero point of the scale correctly. Therefore, for example, as seen in Japanese Utility Model Publication No. 4-21044 (G01B 3/10),
It has been proposed to provide a length adjusting mechanism at the tip of the tape body so that the zero point setting of the scale can be easily corrected.

Further, in the length measurement with a tape measure, a tensile force is applied to the tape body for accurate measurement, which is stipulated by the Architectural Institute of Japan and the like. That is, in the case where the product length exceeds 10 m in the product inspection of the steel aggregate, etc., the tape body is made of steel as a tape measure as a tape measure.
Use S1 grade steel tape with 5 kgf
Must be applied. So in general,
As shown in FIG. 4, the spring measure 320 held by the worker A
Is connected to the locking ring 4 at the tip of the tape body 1 to serve as a reference side,
The operator B on the other measurement point side pulls the tape body 1 to apply a pulling force. That is, the worker A on the reference side reads the spring measure 320 while setting the zero point,
The method is such that the tensile force of gf is confirmed and signaled, and the operator B on the measurement point side reads the scale 10 in response to the confirmation signal of the tensile force.

[0004]

However, the above-mentioned length measurement requires two workers, and the work is cumbersome and cumbersome, and the workability is poor. That is, the worker A on the reference side must set the zero point of the scale correctly and confirm the pulling force and signal, and the worker B on the measuring point side pulls the tape body 1 to apply the pulling force. Since it was necessary to read the scale after receiving a confirmation signal, the workability was poor and the measurement accuracy depended on the cooperation work of both parties.

The present invention has been made in view of the above circumstances, and an object thereof is to be able to confirm the value when a tensile force is applied to a tape body, and the measurement work can be performed easily and accurately by one person. It is to provide a tape measure that can be performed.

[0006]

In order to achieve the above-mentioned object, the present invention provides a tape measure having a tape body having a scale on its surface for length measurement and a case for winding and accommodating the tape body. And a pulling means for applying a pulling force to the tape body pulled out from the case with its tip locked to a measurement target, and a display means for displaying a value of the pulling force by the pulling means. .

[0007]

The operation of the present invention will be described. A pulling force is applied to the tape body by the pulling means, and the value of the pulling force can be known by the display means. Therefore, in the length measurement, the tip of the tape body is locked to the object to be measured, but of course at this time the zero point of the scale is correctly aligned, and the tape body is pulled out from the case appropriately and pulled by the pulling means. A force is applied and the value of the tensile force can be confirmed by the display means, and the scale on the tape body surface at this time can be read.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing a preferred embodiment of a tape measure according to the present invention, and the figure shows a case of the tape measure in a partially cutaway view. 2 is an enlarged side view showing a scale window portion provided on the case.

This tape measure is one in which a tape body 1 is wound and stored in a case 2, and a pulling mechanism 3 for giving a pulling force to the tape body 1 and a value of the pulling force by the pulling mechanism 3 are displayed. And a graduation window 20 for adjusting.

The tape body 1 is made of a strip-shaped and extremely thin steel plate material, and has a scale 10 on its surface for measuring the length. A locking ring 4 is connected to the tip of the tape body 1,
It can be hooked on a nail or the like. The other end of the tape body 1 is wound around a reel 21 inside the case 2, and the reel 21 has a built-in spring mechanism 22 that acts so as to wind the tape body 1.

The case 2 is a box body, which is made of synthetic resin in this embodiment, is provided with an outlet 23 on its side surface, and the tape body 1 is pulled out from the outlet 23. The locking ring 4 at the tip of the tape body 1 is set to be oversized compared to the opening size of the draw-out port 23, and the tape body 1 is completely wound into the case 2 by stopping the locking ring 4. Is being prevented.

The pulling mechanism 3 includes a pull-out port 23 and a reel 21.
It is arranged between and. This is because the pressing piece 3 is attached to the front and back of the tape body 1 by rotating the operation lever 30 to the lock side.
1 and 32 are brought into frictional contact with each other to be in a fixed state, and a tension force can be applied by a tension spring 33 described later.

That is, the pressing pieces 31, 32 are arranged so as to face each other on the front side and the back side of the tape body 1. Pushing pieces 3
A rubber plate 34 is attached to the contact surfaces of the tapes 1 and 32 with the tape body 1 to prevent them from slipping.
3 is connected to the slide guide portion 24 on the case 2 side. A pressing block 35 is arranged above the pressing piece 31 and a slide guide portion 24 is integrally formed with the case 2 below the pressing piece 32. , And the pressing piece 31 is pressed by the pressing block 35 via the plurality of rollers 36. At this time, the pressing pieces 31 and 32 are pressed. Can be moved in the pull-out direction of the tape body 1.

The movement of the pressing block 35 is restricted by the guide wall 25 formed on the case 2, and the pressing block 35 is movable only in the direction penetrating the front and back of the tape body 1. A cam body 37 is arranged above and outside the pressing block 35.
The cam body 37 is connected to the operation lever 30, and when the operation lever 30 is rotated to the lock side, the pressing block 35
Is pushed out toward the tape body 1 side below. Therefore, during the locking operation, the pressing block 35 presses the pressing piece 31 to contact the surface of the tape body 1, and the opposing pressing piece 32 contacts the back side of the tape body 1 so that the front and back surfaces of the tape body 1 are contacted. It will be pinched and stuck. At this time, since the rollers 36 ... Are interposed outside the pressing pieces 31 and 32, the tape body 1 can be moved in the drawing direction, and a tension force can be applied by the tension spring 33 connected thereto. .

A reference line 5 is provided on the side surface of the pressing piece 31, and a scale window 20 is provided on the case 2 so as to substantially coincide with the moving range of the pressing piece 31, as shown in FIG. In addition,
In this embodiment, the unit of the scale is the kilogram.

In the length measurement, as shown in FIG. 3, the locking ring 4 at the tip of the tape body 1 is hooked on a nail 6 or the like to be locked. Of course, at this time, the zero point of the scale 10 is correctly aligned. After the tape body 1 is appropriately pulled out from the case 2, the operation lever 30 is locked. Then, the case 2 is simply pulled, and the pulling force is applied to the tape body 1 by the action of the pulling mechanism 3. Therefore, the position of the reference line 5 is read from the scale window 20 and the value of the pulling force is confirmed. Read 10.

As described above, the pulling mechanism 3 applies a pulling force to the tape body 1, and the value of the pulling force can be known from the scale window 20. Therefore, even one person can carry out the measurement work, and it is simple and accurate. It can be carried out.

In the above embodiment, the value of the tensile force can be known by the scale window 20, but the present invention is not limited to this. For example, the pressing piece 31 or 3
A variable resistor whose resistance value changes with the movement of 2 is provided, and the volume or timbre of the electronic buzzer changes according to the output change of this variable resistor. The value may be known by sound.

[0019]

As described in detail above, according to the tape measure of the present invention, a pulling force is applied to the tape body by the pulling means, and the value of the pulling force can be known by the display means. Therefore, in the length measurement, the tip of the tape body is locked to the object to be measured, the tape body is appropriately pulled out from the case, and the pulling means is operated to apply the pulling force to the tape body. It can be confirmed by reading the scale on the surface of the tape body. Therefore, even one person can perform the measurement work, and moreover, it can be performed easily and accurately.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a side view showing an enlarged scale window portion provided on the case.

FIG. 3 is a perspective view of a usage example of the tape measure shown in FIG.

FIG. 4 is a perspective view showing a usage example of a conventional tape measure.

[Explanation of symbols]

 1 tape body 10 scale 2 case 20 scale window 3 tension mechanism

Claims (1)

[Claims] 1. A tape measure provided with a tape body having a scale on its surface for measuring length and a case for winding and storing the tape body, the tip of which is locked to a measuring object and pulled out from the case. A tape measure, comprising: a pulling unit that applies a pulling force to the tape body, and a display unit that displays the value of the pulling force by the pulling unit.