JP2001123728A - Shaft retaining structure - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a shaft retaining structure which is excellent in workability at the time of use and can firmly prevent the shaft from falling off. When a shaft (6) is inserted into a bearing cylinder (2) of a shaft mounting object (1), knob plates (9, 9) of a curved clip plate (8) elastically engaged with a small-diameter shaft (7) of the shaft (6) are closed. When the curved clip plate 8 is inserted into the slit 3 in the shaft insertion direction of the bearing cylinder portion 2 in a state where the curved clip plate 8 reaches the enlarged receiving groove 5 formed by being cut circumferentially at the end of the slit 3 or in the middle thereof. The gripping portions 9 and 9 are released from the clamping pressure, and the gripping portions 9 and 9 are released.
The widthwise end faces 10, 10 are enlarged.
Abut on 1,11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft retaining structure applied to a shaft for rotatably connecting a pair of hinge blades to each other or a shaft for rotatably connecting a handle to a fixed base. It is.

[0002]

2. Description of the Related Art In a conventional caulking type hinge, a shaft is inserted through each bearing cylinder of a pair of blades, and upper and lower ends of the shaft are crushed by a press machine or the like to form an enlarged portion. This prevents the shaft from falling off the bearing cylinder. In this method, if caulking is not performed carefully, the bearing cylinder portions are tightly pressed from above and below, and it becomes difficult to rotate the blade plates mutually.

[0003] In the hinge of the header pin type, an enlarged head is formed at the upper end of a shaft connecting the pair of blades by header processing, thereby preventing the shaft pin from falling off. In this method, if the head is turned upside down, the enlarged head becomes meaningless and the axis falls off.

As a method for preventing this, a diametrical through hole is provided at the lower end protruding portion of the shaft, and an elastic split pin is inserted into the through hole. However, the split pin is deformed due to aging. There is a risk that it will. Furthermore, there is a press-fit type hinge in which the inner diameter of the bearing cylinder is slightly smaller than the outer diameter of the shaft, and the shaft is pressed and pushed in, but the bearing cylinder may open and deform during long-term use. Therefore, it is difficult to permanently maintain the retaining effect at the beginning of the pushing.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a shaft retaining structure which is excellent in workability at the time of use and which can securely and permanently prevent falling off.

[0006]

Means for Solving the Problems Hereinafter, a description will be given using reference numerals in the attached drawings. In the shaft retaining structure of the present invention, a slit along a shaft insertion direction in a bearing cylinder 2 of a shaft mounting object 1 is provided. 3, a curved clip plate elastically engaged with the small-diameter shaft 7 is provided at an end or midway of the slit 3, an enlarged receiving groove 5 cut in the circumferential direction, and a small-diameter shaft 7 at the end or midway of the shaft 6. Knob plate portions 9 and 9 are provided at both ends of 8.

The curved clip plate 8 is fitted to the small-diameter shaft portion 7 prior to the insertion of the shaft 6 into the bearing tube portion 2. Next, when the shaft 6 is inserted into the bearing cylinder 2, the gripping plate portions 9, 9 of the curved clip plate 8 protruding from the circumferential surface of the shaft 6 are pressed inward, that is, in the closing direction by a fingertip, and the slit is formed. 3 or less. The tabs 9, 9 are inserted into the slits 3 while maintaining the sandwiched state. When the insertion of the shaft 6 into the bearing cylinder part 2 proceeds and the curved clip plate 8 reaches the inside of the enlarged receiving groove 5, the clamping pressure of the knob plates 9, 9 is released, and the knob plates 9, 9 are removed. The end faces 10 in the width direction are brought into contact with the axial wall faces 11 of the enlarged receiving groove 5. This prevents the shaft 6 from being pulled out of the bearing cylinder 2.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment is applied to a hinge, and the shaft mounting object 1 is one wing plate of the hinge. On the other blade 4 of the hinge, a bearing cylinder 12 is provided at a position aligned with the bearing cylinder 2. The shaft 6 is the bearing cylinder 2
After that, it is also inserted into the bearing cylinder 12, and connects the pair of blades so as to be rotatable with each other. The curved clip plate 8 is made of a spring material, and the width of the entrance of the curved clip plate 8, that is, the width between the roots of the knobs 9, 9, in the no-load state, is reduced by the small-diameter shaft 7 of the shaft 6. Is slightly shorter than the diameter.

The knob plates 9, 9 are formed to be bent in mutually opposite inclinations. In fitting the curved clip plate 8 into the small-diameter shaft portion 7, the knob plates 9, 9 act as guide members, and as the small-diameter shaft portion 7 moves toward the root of the knob plate 9, the curved clip plate 8 expands in diameter. Elastically deform in the direction. When passing between the root portions, the curved clip plate 8 is elastically restored in the diameter reducing direction, and is tightly and elastically engaged with the small diameter shaft portion 7. The object to which the shaft retaining structure of the present invention is applied is not limited to a hinge, but may be applied to a handle device or the like.

[0010]

As described above, according to the present invention, when the shaft 6 is inserted into the bearing cylinder portion 2 of the shaft mounting object 1, the curved clip plate 8 elastically engaged with the small diameter shaft portion 7 of the shaft 6 is gripped. Plate part 9,
9 is inserted into the slit 3 in the shaft insertion direction of the bearing cylinder portion 2 while being pressed in the closing direction, and a curved clip plate is inserted into the enlarged receiving groove 5 formed in the terminal 3 of the slit 3 or in the circumferential direction at the middle thereof. Since the gripping portions 9 and 9 are released when they reach 8, the mounting of the curved clip plate 7 as a retaining means on the shaft 6 and the enlarged receiving groove 5 of the knob plates 9 and 9 are performed.
Engagement with is very easy by pushing and pinching with a very simple fingertip, so workability at the time of use is remarkably compared to conventional methods such as crimping fixation, screwing, and locking pin driving. Are better.

When the curved clip plate 8 arrives in the enlarged receiving groove 5, the gripping plate portions 9, 9 are released from the clamping pressure, so that the widthwise end faces 10, 10 of the knob plate portions 9, 9 are enlarged. Since the abutting plate portion 9 is brought into contact with the axial wall surfaces 11 and 11 of the receiving groove 5, the knob plate portion 9 is resistant to buckling and breakage, and the drop off of the shaft 6 is strongly prevented, so that the shaft 6 is stabilized for its intended use. And can be provided permanently and permanently.

[Brief description of the drawings]

FIG. 1 is a front view of a hinge using a shaft retaining structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an exploded perspective view of a shaft and a curved clip plate.

FIG. 4 is a front view showing a process of inserting a shaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Axis mounting object 2 Bearing cylinder part 3 Slit 5 Enlarged receiving groove 6 Axis 7 Small diameter shaft part 8 Curved clip plate 9 Knob plate part 10 Width end face of knob plate part 11 Axial wall surface of enlarged receiving groove

Claims (1)

[Claims] 1. A slit 3 is provided in a bearing cylinder portion 2 of a shaft mounting object 1 along a shaft insertion direction, and an enlarged receiving groove 5 which is opened in a circumferential direction at an end or in the middle of the slit 3 is provided. A small-diameter shaft portion 7 is provided at the end or in the middle, knob plates 9 and 9 are provided at both ends of a curved clip plate 8 elastically engaged with the small-diameter shaft portion 7, and when the shaft 6 is inserted into the bearing cylinder portion 2, a knob plate is provided. Division 9, 9
Is pressed in the closing direction and inserted into the slit 3. When the curved clip plate 8 reaches the enlarged receiving groove 5, the pressing force of the knob plates 9, 9 is released, and the width of the knob plates 9, 9 is released. A shaft retaining structure in which the direction end surfaces 10 and 10 abut against the axial wall surfaces 11 and 11 of the enlarged receiving groove 5.