JPH0421044Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to the improvement of a tape measure used in surveying or construction, etc., and is particularly suitable for measuring long pieces.
To provide a tape measure that allows even one person to easily and accurately perform measurement work.

[Conventional technology]

Conventionally, various types of tape measures with length scales engraved on the strip have been used, but when trying to measure the length between two points with these tape measures, it is necessary to adjust the zero point of the tape to one point. This requires two workers, but especially when measuring long items, a considerable amount of tension is applied to the tape measure to make it as straight as possible between measurement points. Setting the zero point was extremely difficult. If this is done by one person, in order to fix the reference side, engage the locking ring 51 of the tape measure 50 with a suitable locking member such as a nail 52 as shown in FIG. It is measured by subtracting the difference between the zero point on the reference side and the measurement point from the value.

[Problem that the invention attempts to solve]

Therefore, with the conventional tape measure, it is troublesome for one person to measure, and there are problems such as making calculation errors when correcting the zero point on the reference side.

SUMMARY OF THE INVENTION In view of the above problems, the present invention aims to provide a tape measure that allows even one person to perform measuring operations easily and accurately.

[Means for solving problems]

In order to achieve the above object, the tape measure of the present invention is a tape measure in which a length scale is engraved on a band-shaped body, and a locking ring is attached to the end of the band-shaped body on the zero point side via a swingable length adjustment mechanism. The length adjustment mechanism includes a pair of supports attached to each of the band end and the locking ring, a screw shaft that threadably connects the supports to each other, and prevents relative rotation of the supports. a rotation prevention rod, and a support on the end side of the band-shaped body;
It has a sharp anchor part.

[Effect]

When measuring the length between two points using this tape measure, make sure that the reference side point and the zero point of the tape approximately match.
After locking using the fixing means formed at the end of the tape measure, the length of the length adjustment mechanism is adjusted by rotating the screw shaft of the length adjustment mechanism at the end of the strip on the zero point side. By making adjustments, the zero point of the tape measure can be made to coincide with the reference side point, so that the measuring point side can measure by simply reading the scale of the tape measure directly.

Moreover, since the length adjustment mechanism has a sharp anchor part on the support on the end side of the strip, the anchor part is directly inserted into the other surface to be measured while aligning the zero point of the strip with the measurement reference point. The end portion of the strip can be fixed by inserting the strip.

〔Example〕

Hereinafter, an embodiment of the tape measure of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, a tape measure 1 has a structure in which a length scale 3 is engraved on a flexible strip 2. , for example, a flat disc type case (not shown)
The winding is accommodated, and a zero point 4 is provided on the winding end side. Further, a turnbuckle type length adjustment mechanism 6 is swingably connected to the end of the tape measure 1 outside the zero point 4 via a connecting fitting 5.
A locking ring 7 is swingably pivoted at the end of the locking ring 7.

The turnbuckle type length adjustment mechanism 6 has a left screw hole 9 screwed into the axis of the first support 8 which pivotally connects the connecting fitting 5 to its midsection, and a second support having a locking ring 7 pivotally installed therein. Right screw hole 11 screwed into the axis of the body 10
, a screw shaft 13 with a rotation knob 12 in the center;
14 are screwed together, and a detent rod 15 protruding from the first support 8 in parallel with the screw shafts 13 and 14 is engaged with the engagement groove 16 of the second support 10 so as to be slidable in the axial direction. It consists of Note that the reference numeral 17 is an anchor portion having a conical pointed structure at one end of the first support body 8.

For the tape measure with the above configuration, the zero point 4 of the tape measure 1 is the reference side point a.
While using the locking ring 7 to lock and fix the nail c etc. to the side body to be measured b so as to substantially coincide with the figure, and while pulling the tape measure 1 toward the measurement point side, turn the turnbuckle type length adjustment mechanism 6. Rotate the rotation knob 12 in either the left or right direction to align the zero point 4 of the tape measure 1 with the reference side point a. When the rotation knob 12 is rotated, the screw shafts 13 and 14 that are continuous at both ends are screwed into the left and right screw holes 9 and 11 of the first support body 8 and the second support body 10, respectively, and the locking rod is turned. 15 engages with the engagement groove 16 to prevent rotational displacement of both the supports 8 and 10, the distance between the supports 8 and 10 becomes adjacent in the axial direction, and as a result, It becomes possible to displace the zero point 4 of the tape measure 1 via the connecting fitting 5 and make it coincide with the reference side point a.

Further, FIG. 2 shows another example of use, in which a supporter at a reference side point a supports the anchor portion 17 by penetrating it into a building frame, the ground d, or the like. That is, when the turnbuckle type length adjustment mechanism 6 is rotated via the connecting fitting 5 at a substantially right angle to the pulling direction and the anchor portion 17 is thrust into the ground d etc., the tensile force applied to the tape measure 1 is responded to by the anchor portion 17. This makes it possible to stably hold the zero point 4.

In the above embodiment, a screw shaft is provided only on one side of the rotary knob 12 and is screwed onto the second support 10, for example, and the other side of the rotary knob 12 is rotatable relative to the first support 8. It is also possible to have a structure in which the parts are pivotably connected.

[Effect of idea]

As mentioned above, the tape measure of the present invention has a turnbuckle-type length adjustment mechanism outside the zero point of the tape measure, making it possible to easily correct the zero point position on the reference side during measurement. However, measurement work can be done easily and accurately, and by aligning the zero point of the strip with the measurement reference point and inserting the anchor directly into the surface to be measured, the end of the strip can be fixed without using nails, etc. As a result, ease of use is improved and excellent effects can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the main part of the tape measure of the present invention, Fig. 2 is a side view of the main part showing another example of use, and Fig. 3
The figure is a front view of main parts showing an example of use of a conventional tape measure. 1... Tape measure, 2... Band-shaped body, 3... Scale, 5...
...Connecting metal fitting, 6... Turnbuckle type length adjustment mechanism, 7... Locking ring, 12... Rotating knob, 17...
Anchor part.

Claims (1)

[Scope of utility model registration request] In a tape measure in which a length scale is engraved on a strip, a locking ring is attached to the end of the strip on the zero point side via a swingable length adjustment mechanism, and the length adjustment mechanism is connected to the end of the strip. The end portion of the band-shaped body is composed of a pair of supports attached to each of the locking rings, a screw shaft that threadably connects the two supports to each other, and a detent rod that prevents relative rotation of the two supports. A tape measure characterized by having a sharp anchor part on the side support.