JP2001239467A - Round ratchet wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a round ratchet wrench capable of determining, at first glance, that a switching plate is positioned on the tightening side or the loosening side. SOLUTION: This round ratchet wrench comprises an inner-periphery teeth provided at an annular section formed at the tip of a body handle capable of being operated to the right and left by hand, a segment cam engaged and disengaged with/from the inner-periphery teeth, being stored in the annular part, a spring for pressing the segment cam in such a direction to engage it with the inner-periphery teeth, being mounted on a drive body, and a switching character having an arrow indicated on a cap at the tip of the switching plate provided at the front end of the drive body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement in a round ratchet wrench.

[0002]

2. Description of the Related Art In the existing round ratchet wrench, it was impossible to determine at all whether the switching plate was located on the tightening side or the loosening side.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a ratchet wrench which can determine at a glance whether the switching plate is on the tightening side or the loosening side.

[0004]

The means of the present invention are as follows.

[0005] Inner peripheral teeth are provided on an annular portion formed at the end of a main body handle that can be operated left and right by hand, and a segment cam that meshes with the inner peripheral teeth is accommodated in the annular portion. A switching character having a driving body provided, a spring for pressing a segment cam in a direction of meshing with the inner peripheral teeth is mounted on the driving body, and a switching plate mounted on the tip of the driving body points to an arrow displayed on a cap ahead of the switching plate. A round ratchet wrench that displays.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of a round ratchet wrench according to the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a main body handle, which has inner peripheral teeth 20 formed on the entire inner peripheral surface of the distal end annular portion 1a. Numeral 2 denotes a driving body fitted to the annular portion 1a, which is integrally provided with a rectangular projecting portion 2a at the lower end, and makes a part of the main body 1 project therefrom. Reference numeral 3 denotes a switching plate, which is a shaft rod 2 having a center hole 3a integrally protruding from a side of the driving body 2 opposite to the square protrusion 2a.
b, the cap 5 indicated by the arrow 6 is fastened to the surface recess 3b of the switching plate 3, and the square projection 2
The cam coil spring 8 is housed in the base notch 21a, and the teeth 9a of the segment cam 9 fitted in the concave step 2c of the driving body 2
Pushes the segment cam 9 in the direction in which it meshes with the inner peripheral teeth 20, and further feeds the teeth 9 a through the slotted plate 4 below the switching plate 3. Reference numerals 11 and 12 denote characters indicating the switching position on the surface of the switching plate 3, reference numerals 13 and 14 denote receiving protrusions of the plate 4 with a long hole formed in the segment cam 9, and reference numeral 15 denotes a torsion spring.

[0007]

According to the present invention, by turning the switching plate to switch the character 11 or 12 with respect to the arrow 6, whether the teeth 9a of the segment cam 9 mesh with the inner peripheral teeth 20 of the main body and are on the tightening side, Alternatively, it is possible to immediately recognize whether the wrench is located on the loose side, and it is not necessary to rotate and confirm the wrench as in the related art, thereby improving the practical value of this type of wrench.

[Brief description of the drawings]

FIG. 1 is a plan view.

FIG. 2 is a vertical side view.

FIG. 3 is a plan view showing an internal mechanism.

FIG. 4 is a plan view of a segment cam.

FIG. 5 is a front view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body handle 1a Tip annular part 2 Drive body 2a Square projection 2b Shaft 2c Concave step part 3 Switching plate 3a Center hole 3b Surface recess 4 Slotted plate 5 Cap 6 Arrow 8 Cam coil spring 9 Segment cam 9a Tooth DESCRIPTION OF SYMBOLS 11 Indication character 12 Indication character 13 Receiving protrusion 14 Receiving protrusion 15 Torsion spring 20 Inner peripheral tooth 21 Missing part

Claims (1)

[Claims] An inner peripheral tooth is provided at an annular portion formed at a distal end of a main body handle that can be operated left and right by hand, and a segment cam that meshes with the inner peripheral tooth is housed in the annular portion, and a driving square projection is provided. A spring that presses the segment cam in the direction of meshing with the inner peripheral teeth is attached to the driving body, and a switch plate attached to the tip of the driving body points to an arrow displayed on a cap ahead of the switching plate. Round ratchet wrench with switching characters.