JPH02292183A - Tool for detaching c ring - Google Patents

Abstract

PURPOSE:To make the inconvenience in handling nil by forming a structure of opening closing a guide pin through movement of an indirect fitting for closing provided at the center part of two arms by a push rod one of which is journalled. CONSTITUTION:When a handle 3b is rotated to the right direction by inserting a guide pin 1c into the guide hole of a C type stop ring, a support fitting 4 equipped at the tip of a push rod 3 is moved to the front part, becomes in the state shown by a broken line and two arms 1 are closed in the internal direction, respectively via the indirect fitting 5 pivotally supported by the sup port fitting 4 and two arms 1. The two arms 1 are, respectively, opened in the external direction by rotating the handle 3b in the right and left directions. Consequently, the arms 1 are not returned to the original state by the esasticity of the C type stop ring inserted even in case of releasing the hand attached to the handle 3b on the way of closing a pair other arms 1 and the detaching operation of the C type stop ring is performed extremely smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a C-ring attachment/detachment tool, and more particularly to a C-ring attachment/detachment tool that is used so as not to move in the axial direction of a rotating shaft that is supported.

[Conventional technology]

FIG. 2 is a schematic side view of a C-ring briar showing an example of a conventional C-ring attachment/detachment tool. Conventionally, this type of ring briar has two arms 6, each of which has a guide pin at its tip that fits into holes (not shown) at both ends of a C-shaped retaining ring, and the arm 6 has an X-shaped retaining ring. It is equipped with movable fulcrum pins 8 that intersect in a shape. To open and close the guide pin 7 on which the C-shaped retaining ring is set, operate one end of the two arms 6 with one hand, or with both hands in the case of large ring pliers, in the direction of the arrow, but this requires considerable force. was necessary.

[Problem to be solved by the invention]

The conventional ring pliers described above have the following drawbacks because they open and close using the X-shaped intersection as a fulcrum.

(1) In particular, when attaching and detaching a large-diameter C-shaped retaining ring, the attachment/detachment tool is correspondingly large, and since the handle is held with both hands to open and close, considerable force is required, and the fitting pin at the tip comes off from the guide hole. When this happens, the back of your hand hits the edge of the cylinder, which poses a safety problem.

(2) When the force is reduced during opening/closing, the C-shaped retaining ring has elasticity, so it returns to its original shape, which is inconvenient.

[Means to solve the problem]

The C-ring attachment/detachment tool of the present invention has two arms that have guide pins that fit into guide holes at both ends of a C-shaped retaining ring at the tip of the arms, and whose bases are pivotally supported at the ends of a cylindrical handle. and,
a push rod screwed onto the central axis of the handle; a T-shaped operating handle provided at one end of the push rod; and a support fitting that rotatably supports the other end of the push rod; The support fitting and two indirect metal fittings each pivotally supporting the central portion of the two arms by pins are provided, and when the operating handle is rotated left and right, the push rod is moved in the axial direction, and the indirect metal fittings are moved. The guide pins at the tips of the two arms can be opened and closed through the two arms.

〔Example〕

Next, the present invention will be explained with reference to FIG.

FIG. 1 is a schematic side view showing an embodiment of the C-ring attachment/detachment tool of the present invention. In Figure 1, the guide holes at both ends of the C-shaped retaining ring (
The bases of the two arms 1 each having a guide pin IC (not shown) fitted therein are pivotally supported by a pin 1a at the end of a cylindrical handle 2. The center of the handle 2 has a female thread 2a in the axial direction, and a male thread 3 that screws into the female thread 2a.
One end of the push rod 3 having a shape a is provided with a T-shaped operating handle 3b, and the other end is provided with a support metal fitting 4 for rotatably supporting the push rod 3 so that it does not come off. ．． An indirect metal fitting 5 is movably supported by pins lb and 4a symmetrically at the center of the support metal fitting 4 and the left and right arms 1, respectively. With this oval arrangement, when the guide pin IC is inserted into the guide hole of the C-shaped retaining ring and the handle 3b is rotated to the right, the support fitting 4 installed at the tip of the push rod 3 will move forward. It moves and becomes the state shown by the broken line,
The two arms 1 close inward (as shown by arrows) via the support metal fitting 4 and the indirect metal fitting 5 which is pivotally supported by the two arms 1. Further, by rotating the handle 3b to the left, the two arms 1 can be easily opened outward. Even if you release your hand from the handle 3b while the arm 1 is opening or closing, the arm 1 will not return to its original state due to the elasticity of the inserted C-shaped retaining ring, making it extremely difficult to attach or remove the C-shaped retaining ring. It's done smoothly. [Effects of the Invention] As explained above, according to the present invention, one of the two arms is pivotally supported and the opening/closing indirect metal fitting provided at the center of the two arms is moved by a push rod, thereby providing a guide. Since the pin can be opened and closed, there is no inconvenience in handling unlike conventional tools, and the C-shaped retaining ring can be easily attached and detached.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an embodiment of a C-ring attaching/detaching tool according to the present invention, and FIG. 2 is a schematic side view of C-ring pliers showing an example of a conventional C-ring attaching/detaching tool. 1... Arm, la, lb, 4a-pin, 1 c-
・-Guide pin, 2...Handle, 3...Push rod, 3
b...Operating handle, 4...Supporting metal fittings, 5...Indirect metal fittings.

Claims (1)

[Claims] two arms, each having a guide pin that fits into a guide hole at both ends of a C-shaped retaining ring at the tip of the arm, and whose base is pivotally supported at the end of a cylindrical handle; and a central axis of the handle. A push rod screwed onto the top; a T-shaped operating handle provided at one end of the push rod; a support fitting rotatably supporting the other end of the push rod; two indirect metal fittings each pivotally supporting the center portions of the two arms with pins, and when the operating handle is rotated left and right, the movement of the push rod in the axial direction causes the two arms to be moved through the indirect metal fittings. A tool for attaching and detaching a C-ring, characterized in that the guide pin at the tip of a book arm can be opened and closed.