JP2004169281A - Hinge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge, which is assembled simply because the extraction of a hinge pin is obstructed only by an operation for inserting the hinge pin to a shaft cylinder and by which an excessive material and a working cost are not caused. <P>SOLUTION: The hinge is composed of two blades having the shaft cylinders on one-side sections and the hinge pin inserted into the shaft cylinder. A forked leg piece is formed, interposing an expanding slot in the axial direction to the hinge pin, stopping projections are formed at external side faces of the front end of the leg piece and expanded steps are formed on inner peripheral surfaces at the front end of the shaft cylinder of one blade. When the hinge pin is inserted into the shaft cylinder of the blade, the leg piece is deformed elastically inward, and restored elastically at an insertion terminals and the stopping projections are engaged with the expanding steps. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge used for attaching a wing body such as a door to a fixed frame such as a box body so as to be able to open and close and rotate.
[0002]
2. Description of the Related Art A hinge is provided with two blades on one side having shaft cylinders aligned on the same axis, and the two blades are inserted into the shaft cylinders to relatively rotate the two blades. And a connecting shaft pin. When the wing body is not removed from the fixed frame, a hinge (a non-separable type hinge) having a configuration in which the shaft pin cannot be removed from each of the shaft cylinders is used, and when it is necessary to remove the wing body from the fixed frame. A hinge (separable hinge) having a configuration in which the shaft pin can be removed from the one shaft cylinder portion is used.
[0003]
In one non-separable hinge, an enlarged head is formed on the shaft pin, an annular receiving groove is formed at the tip of the shaft pin protruding from one of the shaft cylinders, and a retaining C-shaped ring is fitted into the annular receiving groove. This prevents the shaft pin from falling off (for example, see Patent Document 1).
[0004]
In another non-separable hinge, one blade plate has two upper and lower barrel portions, and the other blade has one barrel portion that fits between the two barrel portions. Then, after inserting the shaft pins whose axial length is shorter than the sum of the axial lengths of the three shaft cylindrical portions into all the shaft cylindrical portions, the opening edges of the upper and lower shaft cylindrical portions are inserted. By bending the portion toward the end surface of the shaft pin, the shaft pin is prevented from falling off (for example, see Patent Document 2).
[0005]
In yet another non-separable hinge, one blade plate has two upper and lower barrel members, and the other blade has one barrel member that fits between the two barrel members. Then, after the shaft pins are inserted into all the shaft cylinder portions, the lock screws are inserted into the annular receiving grooves at the tip portions of the shaft pins from the side surface screw holes of the lower shaft cylinder portion, thereby preventing the shaft pins from falling off. (For example, see Patent Document 3).
[0006]
Further, in the separation type hinge, the shaft pin is fixed to one of the blades by caulking, welding, locking pin driving, or the like to the shaft cylinder portion, and when separating, the one blade is attached to the other blade. By lifting the shaft pin, the shaft pin is pulled out from the shaft cylinder portion of the other blade (for example, see Patent Document 4).
[0007]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-164823 [Patent Document 2] Japanese Utility Model Registration No. 3055916 [Patent Document 3] Japanese Utility Model Publication No. 62-23968 [Patent Document 4] Japanese Patent No. 2546780 [0008]
In the non-separable type hinge, a C-shaped ring must be fitted into an annular receiving groove at the tip of the shaft pin in order to prevent the shaft pin from being removed from the two blades. Additional material and processing costs.
In addition, another non-separable type hinge requires an additional operation of bending the opening edge of the shaft cylinder inward in order to prevent the shaft pin from being pulled out from one of the blades. Occurs.
[0009]
In still another non-separable hinge, an operation of forming a screw hole in a side surface of a specific shaft cylinder portion and inserting a lock screw into an annular receiving groove of the shaft pin is added, and extra material and processing cost are required.
Further, in the above-mentioned separation type hinge, the shaft pin is fixed to one of the blade plates by caulking or welding or a lock pin or the like on the shaft cylinder portion, so that extra material and processing cost are required.
[0010]
An object of the present invention is to provide a hinge in which the hinge is easily assembled and the extra material and processing cost are not generated since the shaft pin is prevented from falling off only by the operation of inserting the shaft pin into the shaft cylinder portion. That is.
[0011]
According to the present invention, there is provided a hinge comprising two blades having a shaft cylinder portion aligned on the same axis on one side, and the two blades inserted into each of the shaft cylinder portions. And a shaft pin for connecting the blades of the blades so as to be rotatable relative to each other, a bifurcated leg is formed on the shaft pin with an axial split groove therebetween, and a stop projection is formed on the outer surface of the tip end of each leg. An enlarged step portion is formed on the inner peripheral surface of the tip end portion of the shaft cylinder portion of the one blade.
[0012]
When the two blades are arranged such that the shaft cylinders are aligned on the same axis, and when the shaft pins are inserted into the shaft cylinders of the blades, among the shaft cylinders located first, Since the peripheral edge portion pushes the outer surface of the stop projection of the forked leg piece, each leg piece is elastically deformed inward so as to reduce the width of the shaft pin.
In the terminal stage of the insertion of the shaft pin, when the stop projection reaches the enlarged step portion of the inner peripheral surface of the shaft cylinder portion located last, the pressing of the stop projection by the inner peripheral surface of the shaft cylinder portion is released. Since the legs are separated, the respective leg pieces are elastically restored, and the stop projections are engaged with the enlarged step portion. As a result, the shaft pin is prevented from falling off from each of the shaft cylinder portions.
[0013]
In addition to the above configuration, when the outer surface of each of the leg pieces is tapered, the operation of inserting the shaft pin into each of the shaft cylinder portions of each blade is smoothly performed by the guiding action of the tapered outer surface. Done.
[0014]
In addition to the above configuration, when the insertion slope is formed on the distal end side of the stop projection along the tapered slope of the leg piece, the insertion slope is pressed by the inner peripheral surface of the shaft cylinder portion. The operation of inserting the shaft pin is further smoothly performed by this guiding action.
[0015]
In addition to the above-described configurations, when a removal slope that is opposite to the insertion slope is formed on the head side of the stop projection, the shaft pin can be pushed out of the shaft cylinder.
That is, the hinge of the present invention is usually used as a non-separable hinge, but can also be used as a separable hinge. When the forcible pushing is performed in the direction, the extracting slope is pushed by the edge shoulder between the inner peripheral surface of the shaft cylinder portion and the enlarged step portion, so that the bifurcated leg is elastically deformed inward, and each of the stop protrusions is formed. Is pushed from the enlarged step portion into the barrel body, and the shaft pin is finally pulled out from each barrel portion.
[0016]
When used as a split hinge, one of the vanes is pre-extracted from both vanes without changing the relative position of the two vanes, and is fixed to the wing body at a later stage. Is separated from the other blade fixed to the fixed frame. Therefore, the operation of lifting the wing body as in the related art becomes unnecessary.
[0017]
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, the two blades 1, 2 are formed of engineering plastic. The upper and lower two shaft cylinder portions 3 of one blade 1 are formed at an interval, and one shaft cylinder portion 4 of the other blade 2 is formed. It is fitted. The inner diameters of the shaft cylinder portions 3 and 4 are the same as or slightly smaller than the outer diameter of the shaft pin 5. The enlarged step portion 6 is formed on the lower end side of the shaft cylinder portion 4. Another enlarged step portion 7 is formed on the upper end side of the upper shaft cylinder portion 3, and the enlarged head 8 of the shaft pin 5 is fitted into the enlarged step portion 7.
[0018]
The split groove portion 9 is formed in a U-shape at the tip of the shaft pin 5, and the forked leg pieces 10, 10 on both sides of the split groove portion 9 are formed on the tapered inclined surface 11 so as to protrude along the axial direction. The protrusion 12 has a chevron-shaped cross section, and the slope on the tip end side of the chevron-shaped cross section is an insertion slope 13 that functions during insertion work, and the slope on the head side of the chevron-shaped cross section is a removal slope 14 that functions during extraction work.
[0019]
In each of the wing plates 1 and 2, fixing holes 15 and 16 to the wing body or the fixed frame are formed at positions away from the shaft cylinder portions 3 and 4.
[0020]
As described above, according to the first aspect of the present invention, the two blades are assembled so as to be relatively rotatable only by the operation of inserting the shaft pin into each shaft tube portion, and the two blade plates are separated from each shaft tube portion. Since the dropping of the shaft pin is accurately prevented, the manufacture and assembly of the hinge can be easily performed without adding any extra material or processing cost.
[0021]
According to the second and third aspects of the present invention, in addition to the above-described effects of the first aspect of the present invention, the operation of inserting the shaft pin is performed smoothly.
[0022]
According to the fourth aspect of the invention, in addition to the effects of the second and third aspects of the present invention, when used as a separate hinge, the shaft pin can be pulled out by pushing up the shaft pin.
[Brief description of the drawings]
FIG. 1 is a front view of a disassembled state of a hinge according to an embodiment of the present invention.
FIG. 2 is a front view of the hinge of FIG. 1 in an assembled state.
FIG. 3 is a plan view of the hinge of FIG. 2;
FIG. 4 is a sectional view taken along line AA of FIG. 3;
[Explanation of symbols]
[0013]
DESCRIPTION OF SYMBOLS 1 Wing plate 2 Wing plate 3 Shaft cylinder part 4 Shaft cylinder part 5 Shaft pin 6 Enlarged step part 7 Enlarged step part 8 Enlarged head 9 Split groove part 10 Leg piece 11 Tapered inclined surface 12 Stop projection 13 Slope for insertion 14 For removal Slope 15 Fixing hole 16 Fixing hole

Claims (4)

Consisting of two blades having a shaft cylinder portion aligned on the same axis on one side, and a shaft pin inserted into each of the shaft cylinder portions and connecting the two blades so as to be relatively rotatable, A bifurcated leg piece is formed on the shaft pin with the axial groove part interposed therebetween, and a stop projection is formed on the outer surface of the tip end of each leg piece, inside the tip of the shaft cylinder portion of the one blade. Forming an enlarged stepped portion on the peripheral surface, when the shaft pin is inserted into each of the shaft cylinder portions of the wing plate, each leg is elastically deformed inward, and each leg is elastically deformed at the insertion end. A hinge in which the stop projection is restored and engages with the enlarged step portion. The hinge according to claim 1, wherein an outer surface of each of the leg pieces is formed as a tapered inclined surface. The hinge according to claim 2, wherein a slope for insertion is formed on a tip end side of the stop projection along the tapered inclined surface of the leg piece. The hinge according to claim 2, wherein a slope for extraction that is opposite to the slope for insertion is formed on a head side of the stop protrusion.

Images