JPH07332904A - Measuring tape scale - Google Patents

Abstract

PURPOSE:To provide a measuring tape scale in which a measuring tape can be fed by one hand. CONSTITUTION:Cases 1a and 1b are so assembled as to be engaged with one another, and supported by a rotary shaft 6 together with a spring member 7 at one end. A rotatably reciprocating motion of the cases 1a, 1b can be generated by strengthening or weakening a gripping force. Thus, a ratchet wheel 10 is rotated by feed ratchets 11a, and a drive gear 8 is rotated via a main gear 12 and an intermediate gear 9. A measuring tape feed roller 15 is fixed to the gear 8. A measuring tape 3 sandwiched between auxiliary rollers 16 can be fed, and the force of an inner spiral take-up spring 5 is simultaneously stored. After the measurement, when a feed ratchet mechanism 11 is released by a release button 13, the tape 3 can be automatically rewound in a case by the stored force of the spring 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape measure capable of winding a measuring tape in a case body by a winding spring.

[0002]

2. Description of the Related Art Heretofore, as a tape measure for measuring a length and a distance using a measuring tape made of a steel plate, a woven cloth, a plastic material or the like, an automatic one is known. The measuring tape used for the automatic tape measure has a gutter-shaped cross section, and tends to be linear when pulled out from the case.

FIG. 3 is a structural view of a conventional tape measure. In the figure, 1 is a case, 2 is a winding drum, 3 is a measuring tape, 4
Is a hook member, and 5 is a winding spring. A winding drum 2 is rotatably housed in the case 1. The winding drum 2 is divided into two parts, the measuring tape 3 is wound on the outer side, and the winding spring 5 is arranged on the inner side.
When the measuring tape 3 wound around the winding drum 2 is pulled out, the winding spring 5 stores energy, and when the pulled-out measuring tape 3 is released, the measuring tape 3 is stored by the storing force of the winding spring 5.
The winding drum 2 can be automatically wound. Some have a stop mechanism for temporarily stopping the pulling-out of the pulled-out measuring tape 3.

When pulling out the measuring tape 3, since it is necessary to hold the case 1 with one hand and pull out the measuring tape 3 with the other hand, both hands are required.
There is a problem that it is difficult to use in a place where both hands are difficult to use. Further, there is a similar problem even in a work in which one hand is occupied, such as taking a note with one hand or writing a rule.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a tape measure capable of feeding a measuring tape with one hand.

[0006]

The present invention provides a tape measure in which a winding drum around which a measuring tape is wound is housed in a case, and a winding spring is provided in the winding drum. On the other hand, a ratchet wheel rotatably supported, a feeding pawl mechanism that can be operated while holding the case and rotates the ratchet wheel, a measuring tape feeding roller, and rotation of the ratchet wheel to the measuring tape feeding roller. A rotation transmission mechanism for transmitting the measurement tape is provided, and the feed claw mechanism is operated to rotate the measurement tape feed roller in the feeding direction of the measurement tape.

It is also characterized in that the feed pawl mechanism is actuated by reciprocally rotating a part of the case, or the feed pawl mechanism is actuated by a lever member provided in the case. .

[0008]

According to the present invention, the feed claw mechanism that can be operated while holding the case is operated to rotate the ratchet wheel, and the rotation transmission mechanism that transmits the rotation of the ratchet wheel to the measuring tape feed roller is provided. As a result, the measuring tape feed roller can be rotated to feed the measuring tape. Therefore, it is possible to operate the feed claw mechanism with the hand holding the case to feed out the measuring tape,
You can operate the tape measure with one hand.

The feed claw mechanism is operated by rotating and reciprocating a part of the case body, or by a lever member provided in the case. Can be easily operated with one hand.

[0010]

1 is a structural diagram of a first embodiment of a tape measure of the present invention. In the figure, 1a and 1b are cases, 2 is a winding drum, 3 is a measuring tape, 4 is a hook member, 5 is a winding spring, 6 is a rotating shaft, 7 is a spring member, 8 is a drive gear, and 9 is Intermediate gear, 10 is a ratchet wheel, 11 is a feed pawl mechanism, 11a is a feed pawl, 11b is a stop pawl, 12 is a main gear,
13 is a release button, 14 is a release lever, 15 is a measuring tape feed roller, and 16 is an auxiliary roller.

In this embodiment, the case is composed of a case 1a and a case 1b and is divided into upper and lower parts. It is advantageous in terms of assembly that the case 1a is composed of two members so that it can be divided into left and right parts. The case 1b may be configured as one member. Case 1b is Case 1
They are combined so as to be fitted into a and are rotatably supported at one end by a rotation shaft 6, and are urged by a spring member 7 in a direction in which both cases are opened. Therefore, case 1
A rotating reciprocating motion can be generated by increasing or decreasing the force of gripping a and 1b.

The internal mechanism will be described. Winding drum 2
A winding spring 5 is provided on the inner peripheral side of the winding spring 5, one end of the winding spring 5 is fixed to the winding drum 2 side, and the other end is fixed to a groove formed in the central shaft. On the outer peripheral side of the winding drum 2,
The measuring tape 3 is wound up. A hook member 4 is provided on the outer end of the measuring tape 3 so that the end is not pulled into the case 1a when the measuring tape 3 is wound up, and the measuring tape 3 is hooked on the object to be measured. It is made possible.

On the side surface of the winding drum 2, a ratchet wheel 10 which is separately rotatable with respect to the winding drum 2 is supported. The ratchet wheel 10 may be supported by providing a support shaft on the case 1a, but it is necessary that the ratchet wheel 10 is rotatable with respect to the ratchet wheel 10. A main gear 12 is fixed to the ratchet wheel 10. The rotation of the main gear 12 is transmitted to the intermediate gear 9 that meshes with the main gear 12. The intermediate gear 9 meshes with the drive gear 8 and transmits the rotation of the main gear 12 to the drive gear, but the gear train is designed so that the rotation of the main gear 12 is accelerated and transmitted to the drive gear 8. Good. A measuring tape feed roller 15 is coaxially fixed to the drive gear 8. The surface of the measuring tape feed roller 15 is made of a material having a high friction coefficient, for example,
Silicon rubber or the like is used, and an auxiliary roller 16 is rotatably provided as a pressure contact roller so as to sandwich the measurement tape facing it.

A feed pawl mechanism 11 is engaged with the ratchet gear of the ratchet wheel 10. Feed claw mechanism 11
Is rotatably supported by the case 1b, and the feed claw 1
It has 1a and a stop claw 11b. It may be biased clockwise by a spring. A release lever 14 operated by a release button 13 is connected to the feed pawl mechanism 11, and by operating the release button 13, the feed pawl mechanism 11 can be disengaged from the ratchet gear of the ratchet wheel 10.

The operation will be described. When the case is gripped and a force is applied, the case 1a and the case 1b are rotated in a direction of approaching each other. As a result, the ratchet gear is fed by the feed claw 1
It can be rotated by 1a. When the force holding the case is released, the case 1a and the case 1b are separated from each other by the spring member 7
Return to the original position by the force of the ratchet wheel 10
The rotation is suppressed by the stop claw 11b. The ratchet wheel 10 can be rotated in the clockwise direction in FIG. 1 by repeating this rotation reciprocating operation. By rotating the ratchet wheel 10, the drive gear 8 can be rotated via the main gear 12 and the intermediate gear 9, and the measuring tape feed roller 15 can be rotated clockwise in FIG.
The rotation of the drive gear 8 is accelerated at a ratio according to the number of teeth of the main gear fixed to the ratchet wheel 10 and the number of teeth of the drive gear 8. When the measuring tape feeding roller 15 rotates, the measuring tape 3 sandwiched between the measuring tape feeding roller 15 and the auxiliary roller 16 can be fed out, and at the same time, the internal spiral winding spring 5 is stored. After the measurement, by releasing the feed claw mechanism 11 with the release button 13, the measuring tape 3 can be automatically rewound into the case by the stored force of the winding spring 5.

The rewinding of the measuring tape 3 is performed by the feeding claw mechanism 1
It is not limited to the cancellation of 1. A mechanism for moving the measuring tape feed roller 15 or the auxiliary roller 16 is provided,
At the time of rewinding, the measuring tape 3 is set free by setting a gap between the measuring tape feeding roller 15 and the auxiliary roller 16, and the measuring tape 3 is stored by the force of the winding spring 5.
Can be automatically rewound in the case. Both the measuring tape feed roller 15 and the auxiliary roller 16 may be moved.

FIG. 2 is a structural diagram of a second embodiment of the tape measure of the present invention. In the figure, the same parts as those in FIG. Reference numeral 1 is a case, and 17 is a lever member. In this embodiment, the case 1 is provided with the lever member 17. By gripping the case 1 and operating the lever member 17, the feed claw mechanism 11 can be operated.
As described in the first embodiment, the ratchet wheel 10 can be rotated to rotate the drive gear 8 via the intermediate gear 9, and the measuring tape feed roller 15 can be rotated clockwise in the drawing. You can The measurement tape 3 can be fed out by the rotation of the measurement tape feed roller 15, and at the same time, the internal winding spring 5 is stored. After the measurement, the feed claw mechanism 11 is released by a release button (not shown), and the measuring tape 3 can be automatically rewound into the case by the stored force of the winding spring 5.

Also in this embodiment, the rewinding of the measuring tape 3 is performed by providing a mechanism capable of moving the measuring tape feeding roller 15 or the auxiliary roller 16 or both of them, without releasing the feeding claw mechanism 11. At this time, the measuring tape 3 is set free by setting the gap between the measuring tape feeding roller 15 and the auxiliary roller 16 and the winding spring 5
The measuring tape 3 may be automatically rewound into the case by the stored force of.

[0019]

As is apparent from the above description, according to the present invention, the measuring tape can be fed out without using the other hand while holding the tape measure. The unwound tape can be automatically rewound by the urging force of the winding spring as in the conventional tape measure.

[Brief description of drawings]

FIG. 1 is a structural diagram of a first embodiment of a tape measure of the present invention.

FIG. 2 is a structural diagram of a second embodiment of the tape measure of the present invention.

FIG. 3 is a structural diagram of an example of a conventional tape measure.

[Explanation of Codes] 1, 1a, 1b ... Case, 2 ... Winding drum, 3 ... Measuring tape, 4 ... Hook member, 5 ... Winding spring, 6 ... Rotating shaft,
7 ... Spring member, 8 ... Drive gear, 9 ... Intermediate gear, 10 ... Ratchet wheel, 11 ... Feed claw mechanism, 11a ... Feed claw, 11b ... Stop claw, 12 ... Main gear, 13 ... Release button, 14 ... Release lever , 15 ... Measuring tape feed roller,
16 ... Auxiliary roller, 17 ... Lever member.

Claims (3)

[Claims] 1. A tape measure in which a winding drum around which a measuring tape is wound is housed in a case and a winding spring is provided in the winding drum, and is rotatably supported with respect to the winding drum. A ratchet wheel, a feed pawl mechanism that can be operated while holding the case to rotate the ratchet wheel, a measurement tape feed roller, and a rotation transmission mechanism that transmits the rotation of the ratchet wheel to the measurement tape feed roller. A tape measure, characterized in that the feed tape mechanism is operated to rotate the measurement tape feed roller in a direction for feeding out the measurement tape. 2. The tape measure according to claim 1, wherein the feed claw mechanism is operated by reciprocally rotating a part of the case. 3. The tape measure according to claim 1, wherein the feed pawl mechanism is operated by a lever member provided on the case.