JP3904312B2 - Tape measure - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a tape brake device of a tape measure in which a tape urging means is incorporated.
[0002]
[Prior art and problems]
2. Description of the Related Art Conventionally, many tape measures equipped with a biasing means such as a coil spring that biases a tape in the winding direction include a braking device that stops the tape at an arbitrary pulling position against the biasing force of the biasing means. .
Among them, a brake device that holds the drawn tape stopped at an arbitrary position by operating the button or lever of the brake operation unit, or a brake device that stops the tape only when the button is pushed. There is.
[0003]
And since the tape measure provided with the braking device which stops the tape only at the time of operation is a braking device used for a comparatively low-priced tape measure, when installing the braking device or its braking operation part, the case can be easily installed. The side was the main.
However, if the brake operation unit is installed on the side of the case, the operator's hand requires two forces: the support force that supports the tape measure body and the pressing force of the brake operation unit that stops the tape that has been pulled out. As a result, a considerable burden was placed on the hands of the workers.
[0004]
For this reason, the present applicant has proposed a brake device or a brake operation portion provided on the bottom surface of the case, thereby reliably stopping the pulled-out tape without destabilizing the support force of the case. The injuries caused by dropping the tape measure and sudden pulling in of the tape were eliminated.
However, when performing the measurement work while pulling out the drawn tape several centimeters or several tens of centimeters, the operation must be performed while frequently adjusting the finger pressing force on the bottom of the case. It became extremely difficult as the worker's age increased.
[0005]
【the purpose】
The present invention has been made in view of the above-described problems, and can reliably support the tape measure, and can perform the operation safely and at the time of measurement work involving a short distance pull-in operation in addition to a normal braking operation. It is an object to provide a tape measure that can be facilitated.
[0006]
[Means for solving problems]
The gist of the present invention lies in a tape measure in which a rotating drum for winding a tape around a shaft is supported in a case, and a biasing means for biasing the tape in the winding direction is incorporated in the rotating drum. The tape measure is characterized in that a brake operation part that can be pushed inwardly into the case is provided on the front wall of the case, and a brake shoe that contacts the disk inner surface of the rotating drum is connected to the brake operation part.
[0007]
This tape measure will be described in more detail. A rotating drum that winds the tape around is pivotally supported in the case, and the tape is urged by entraining the tape inside the case as an urging means for urging the tape in the winding direction. The coil spring has a built-in coil spring whose inner end is wound around a shaft provided in the case, and its outer end is connected to the tape so that the coil spring can be pulled out to store energy. It has become.
The front wall of the tape measure case, which is configured in this way, is provided with a braking operation section for a braking device that decelerates or stops the tape. When braking is required, the braking operation section is pushed inward to the brake. The brake shoe connected to the operation unit comes into contact with the rotating drum, and the tape is braked.
[0008]
The front wall of the case refers to a wall located between the tape entrance / exit of the tape below the case and the highest part (vertex part) of the case, and braking of a braking device that can be pushed inward into the case at a suitable position of this part. An operation unit is provided.
The brake operation unit is formed of a suitable material (resin / metal material, etc.), and the brake shoe connected thereto is separated from the rotary drum by an elastic plate, a spring, or the brake operation unit main body. It is better to support it elastically.
The method of elastically supporting is not particularly limited, and may be supported by a suitable method.
[0009]
The brake operation part is usually button-shaped, but it is molded with an elastic material such as rubber, silicon, and elastomer so that it is in close contact with the opening of the case for installing the brake operation part. It is desirable not to enter.
Furthermore, an appropriate cut may be made in the case member on the front wall, and that portion may be used as a braking operation unit having elasticity.
[0010]
And it is desirable to make a brake shoe contact the disk of the both sides of a rotating drum.
The shape and material of the brake shoe are not particularly limited as long as the braking performance is not impaired.
[0011]
The connection method between the brake shoe and the brake operation unit is not particularly limited, and may be connected by an arbitrary method. Further, the brake shoe and the brake operation unit may be formed as an integral part.
The disk inner peripheral surface refers to the tape drum side of the rotating drum.
[0012]
[Action]
Since the tape measure of the present invention is structured as described above, when braking is required, the case is held with one hand, and the braking operation portion on the front wall of the case is pushed inward with the thumb.
As a result, the brake shoe connected to the braking operation unit is pressed against the peripheral edge of the disk of the rotary drum for winding the tape, and the tape is braked.
[0013]
At this time, the hand and fingers supporting the tape measure support the bottom surface of the case with fingers other than the thumb, support the upper part of the case with the base of the thumb and the palm near the base, and the braking operation unit is operated by the thumb. The
Thereby, sufficient support force of the tape measure can be obtained, and the braking operation can be performed accurately.
[0014]
【Example】
The tape measure according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of the tape measure according to the present invention with the half case removed, and reference numeral 1 relates to the present invention in which a brake operation portion 21 is provided on the case front wall 13. A tape measure 2 is a braking device, which includes a braking operation portion 21 and a brake shoe 22, and the braking operation portion 21 is elastically supported by the elastic plate 4 in the openings 14 of the half case 11 and the half case 12 (not shown). The
Reference numeral 3 denotes a rotating drum for winding the tape 7, which is supported by a shaft 18 standing on an inner wall 15 of the half case 11 and the half case 12 (not shown). 31 is a disk periphery, and the brake shoe 22 comes into contact with the pushing of the braking operation portion 21 at the time of braking.
[0015]
Reference numeral 5 denotes a coil spring that urges the tape 7 in the winding direction, 6 denotes an inlet / outlet through which the tape 7 enters and exits, and 71 denotes a locking piece of the tape 7.
FIG. 2 is a front view of the tape measure according to the present invention. Since the braking operation portion 21 of the braking device 2 of the tape 7 is provided on the case front wall 13 of the tape measure 1, the front of the case is required when braking is required. Push the braking operation portion 21 of the wall 13 inward of the case.
As a result, the brake shoe 22 connected to the braking operation section 21 of the braking device 2 is pressed against the disk peripheral edge 31 of the rotary drum 3 for winding the tape 7, and the tape 7 is braked. (See Figure 1)
[0016]
FIG. 3 is a partially enlarged view of a tape measure in which the braking operation portion is formed of an elastic material. In this embodiment, the braking operation portion 21 of the braking device 2 is formed of an elastic material, and the half case of the case front wall 13 is shown. 11 and a half case 12 (not shown) are provided in an opening 14 (see FIG. 1) in a substantially close contact with the case member.
The brake shoe 22 is supported at a desired interval from the disk peripheral edge 31 of the rotary drum 3 by the elasticity of the braking operation portion 21 itself formed of an elastic material.
FIG. 4 is a front view of a tape measure in which the braking operation portion is formed of an elastic material.
[0017]
FIG. 5 is a partially enlarged view of a tape measure made of a case member in which the braking operation portion is cut. In this embodiment, the braking operation portion 21 of the braking device 2 is connected to the half case 11 and the half case of the case front wall 13. 12 (not shown) is made of a case member provided with an appropriate notch 16 to provide elasticity.
In this embodiment, the brake shoe 22 is integrally formed with the case member, and is supported at a desired interval from the disk peripheral edge 31 of the rotary drum 3 by the elasticity of the braking operation portion 21 itself.
FIG. 6 is a front view of a tape measure composed of a case member in which the braking operation portion is cut.
[0018]
FIG. 7 is a partial cross-sectional view of a tape measure in which the brake shoe 22 contacts the disk periphery of the rotating drum. FIG. 8 is a partial cross-sectional view of a tape measure in which the brake shoe 22 comes into contact with the inner surface of the disk of the rotary drum 3, and the braking operation unit 21 cannot be removed by the stopper 23 in the opening 14 of the half case 11 and the half case 12. The lower end portion of the brake operation unit 21 is in contact with a brake shoe 24 integrally formed with the case member, and the brake shoe 24 is pushed inward of the case to cause the brake shoe 24 to move to the inner surface of the disk of the rotary drum 3. While bending to 32 side, the disc inner surface 32 is pressed and the tape 7 is braked. FIG. 9 is a development of the embodiment of FIG. 8, in which the brake shoe 22 is brought into contact with the inner side of the disk peripheral edge 31 of the rotary drum 3 to obtain a braking force.
[0019]
【effect】
As described above, the tape measure of the present invention has the braking operation portion of the braking device provided on the front wall of the tape measure case, so that the thumb is naturally positioned on the brake operation portion at the normal grip position of the tape measure case. Since it is only necessary to push the thumb in the direction to strengthen the grip while braking, braking can be performed with extremely natural movement, and there is no need for unnecessary movement such as holding theory, shifting finger position etc. Absent. Further, in addition to the normal braking operation, it is possible to make the operation safe and easy even during measurement work involving a short-distance pull-in adjustment operation for frequently pulling out the tape.
Thus, anyone can easily perform the braking operation regardless of the age of the operator who uses the tape measure.
[Brief description of the drawings]
1 is a side view of a tape measure according to the present invention with a half case removed. FIG. 2 is a front view of the tape measure according to the present invention. FIG. 3 is a partially enlarged view of a tape measure in which a braking operation portion is formed of an elastic material. FIG. 4 is a front view of a tape measure in which a braking operation portion is formed of an elastic material. FIG. 5 is a partially enlarged view of a tape measure made of a case member in which the braking operation portion is cut. FIG. FIG. 7 is a partial cross-sectional view of the tape measure in which the brake shoe comes into contact with the peripheral edge of the disc of the rotating drum. FIG. 8 is a partial cross-sectional view of the tape measure in which the brake shoe comes into contact with the disc inner surface of the rotary drum.
FIG. 9 is a partial cross-sectional view of a tape measure in which the brake shoe comes into contact with the inner surface of the disc of the rotating drum.
1- tape measure, 11- half case, 12- half case, 13- case front wall, 14- opening, 15- inner wall, 16- notch, 17- projection, 18-shaft, 2-braking device, 21- braking operation Portion, 22-brake shoe, 23-stopper, 24-brake shoe, 3-rotating drum, 31-disc peripheral edge, 32-disc inner surface, 4-elastic plate, 5-coil spring, 6-entrance / exit, 7-tape, 71 -Locking piece

Claims (4)

A tape measure in which a rotating drum that winds the tape around the shaft is supported in the case, and a biasing means for biasing the tape in the direction of winding is installed on the rotating drum. A tape measure in which a brake operation unit is provided and a brake shoe that contacts the inner surface of the disk of the rotary drum is connected to the brake operation unit . The tape measure according to claim 1 , wherein the braking operation portion is formed of an elastic material and is provided in a state of being in close contact with the case member . The tape measure according to claim 1 , wherein the braking operation unit is a case member having a cut . The brake shoe is formed integrally with the case member, the tip of the brake shoe faces the inner surface of the disc of the rotating drum, and the tip of the brake shoe is brought into sliding contact with the inner surface of the disc when the braking operation portion is pushed toward the rotating drum. The tape measure according to claim 1, which is configured as follows.

Images