hinge

Abstract

To provide a novel hinge with a simple configuration different from the conventional hinges, which avoids direct metal-to-metal or resin-to-resin contact.SOLUTION: In a hinge 1, washers 5 and 6 include annular erect edges 5a and 6a that erect by a height dimension smaller than a thickness dimension of flanges 7a, 8a, 9a and 10a so as to engage with an outer periphery of any of the contacting flanges 7a, 8a, 9a and 10a. Thereby a gap G2 is ensured between two of the facing flanges 7a, 8a, 9a and 10, and a gap G1 is ensured between inner peripheries of the washers 5 and 6 and an outer periphery of a pivot 4. Therefore, metal-to-metal contact or resin-to-resin contact is avoided, and associated dust generation is avoided.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to hinges used for doors of equipment in factories that manufacture precision parts such as semiconductors, where dust and dirt are undesirable, and for opening and closing doors in clean rooms. [Background technology]

[0002] Hinges generally consist of a pair of blades and a pivot that is inserted into the shaft tube of the blades and connects the blades, and are used as connecting members for doors of control panels for equipment, room entrances, etc. The blades and pivot are usually made of metal for strength and durability reasons, but metal powder is scattered from the contact points between the metals due to sliding friction, which affects the quality of the product. Therefore, precision parts manufacturers are seeking measures to prevent metal powder from scattering from hinges. To solve this problem, a hinge has been proposed in which a bushing or washer made of an oil-impregnated synthetic resin with a different hardness from the metal material is inserted in the sliding part to prevent direct contact between the metals (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-10a3378 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a novel hinge that has a simple structure different from the conventional hinges described above and that avoids direct contact between metals or resins. [Means for solving the problem]

[0005] In the following description, reference will be made to the reference numerals in the accompanying drawings, but the present invention is not limited thereto. In order to solve the above problem, the hinge 1 of the present invention includes a metal first blade 2 having a plurality of first axial tubes 2a, 2b facing each other at a distance from each other on the same axis, a metal second blade 3 having a second axial tube 3a interposed between the first axial tubes 2a, 2b with its axis coinciding, synthetic resin bushings 7, 8, 9, 10 fitted into the opposing axial ends of the first and second axial tubes 2a, 2b, 3a respectively and having flanges 7a, 8a, 9a, 10a abutting the opposing end faces, metal washers 5, 6 interposed between the opposing faces of the flanges 7a, 8a, 9a, 10a, and a pivot 4 inserted through the first and second axial tubes 2a, 2b, 3a via the bushings 7, 8, 9, 10 and the washers 5, 6 and connecting the first and second blades 2, 3. The washers 5, 6 have annular raised edges 5a, 6a that rise to a height dimension smaller than the thickness dimension of the flanges 7a, 8a, 9a, 10a so as to engage with the outer periphery of any of the abutting flanges 7a, 8a, 9a, 10a, thereby ensuring a gap G2 between the two opposing flanges 7a, 8a, 9a, 10a and a gap G1 between the inner periphery of the washers 5, 6 and the outer periphery of the pivot 4, thereby avoiding contact between metals and between resins. [Effects of the Invention]

[0006] According to the present invention, it is possible to provide a novel hinge that has a simple structure different from conventional hinges, prevents contact between metals or between resins, and has good cost performance. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a front view of a hinge according to the present invention. [Figure 2] FIG. 2 is an enlarged cross-sectional view of a shaft portion of the hinge of FIG. 1. [Figure 3] FIG. 3 is an enlarged view of part III in FIG. 2. [Figure 4] FIG. 3 is an enlarged view of part IV in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described with reference to the drawings. In the figure, the hinge 1 includes a first and second pair of blades 2 and 3, a pivot 4, washers 5 and 6, bushings 7, 8, 9 and 10, and a washer 11.

[0009] The first blade 2 is made of metal and has two first axial tubes 2a and 2b on one side edge of the blade 2. The axial tubes 2a and 2b are provided at one side edge of the blade 2 at a distance from each other above and below along the axis of the pivot 4, which extends in the vertical direction in the figure.

[0010] The second blade 3 is made of metal and has a second axial tube 3a at the vertical middle of one side edge. The axial tube 3a is interposed between the axial tubes 2a and 2b and is aligned with their axes.

[0011] The bushings 7, 8, 9, and 10 are made of oil-impregnated synthetic resin and each have a flange 7a, 8a, 9a, or 10a at one end. The outer diameter of the bushings 7, 8, 9, and 10, excluding the flanges 7a, 8a, 9a, or 10a, can be fitted and fixed to the shaft tubes 2a, 2b, and 3a, preventing relative rotation between them.

[0012] The outer diameters of the flanges 7a, 8a, 9a, and 10a are smaller than the outer diameters of the shaft tubes 2a, 2b, and 3a.

[0013] The washers 5, 6 are made of metal and have a round, flat shape with annular raised edges 5a, 6a at their peripheries. The raised edges 5a, 6a have a height smaller than the thickness of the flanges 7a, 8a, 9a, 10a and are formed on the inner diameter along the outer peripheries of the flanges.

[0014] The pivot 4 is made of metal and is inserted into the bushings 7, 8, 9, and 10 so that it can slide and rotate relative to one another. It protrudes from the upper and lower ends of the first shaft tubes 2a and 2b, and is crushed and crimped in the axial direction with a metal washer 11 interposed between it and the upper and lower ends of the shaft tubes 2a and 2b, so that the pivot 4, washer 11, and blade 2 are integrated so that they do not rotate relative to one another.

[0015] In hinge 1 having the above-mentioned components, as shown in FIG. 2, bushing 7 is fitted into and fixed to the lower end of axial tube 2a of blade 2, bushings 8 and 9 are fitted into and fixed to the upper and lower ends of axial tube 3a of blade 3, and bushing 10 is fitted into and fixed to the upper end of axial tube 2b of blade 2.

[0016] In this state, the flange 7a of bushing 7 abuts against the lower end surface of the axial tube 2a of blade 2, the flanges 8a and 9a of bushings 8 and 9 abut against the upper and lower end surfaces of the axial tube 3a of blade 3, and the flange 10a of bushing 10 abuts against the upper end surface of the axial tube 2b of blade 2.

[0017] A washer 5 is interposed between the flanges 7a, 8a of the bushes 7, 8 that face each other in the axial direction of the pivot 4, and a washer 6 is interposed between the flanges 9a, 10a of the bushes 9, 10 that face each other in the same direction.

[0018] In this state, the annular raised edge 5a of the washer 5 is fitted onto the outer periphery of the flange 8a, and the annular raised edge 6a of the washer 6 is fitted onto the outer periphery of the flange 9a. Therefore, as clearly shown in Figures 3 and 4, a gap G1 is formed between the outer periphery of the pivot 4 and the inner peripheries of the washers 5 and 6.

[0019] Furthermore, since the height of the annular raised edges 5a, 6a of the washers 5, 6 is smaller than the thickness of the flanges 8a, 9a, a gap G2 is formed between the lower end of the raised edge 5a and the upper end of the axle tube 3a, and between the upper end of the raised edge 6a and the lower end of the axle tube 3a, as clearly shown in Figures 3 and 4. Therefore, the washers 5, 6 do not come into contact with the pivot 4 or the axle tubes 2a, 3a.

[0020] For example, when a door to which hinge 1 is attached is opened or closed, blades 2 and 3 pivot relatively around pivot 4, and bushings 7, 8, 9 and 10 slide around pivot 4 together with shaft tubes 2a, 3a and 2b via washers 5 and 6. During this sliding movement, washers 5 and 6 are interposed between bushings 7 and 8 and between bushings 8 and 9, respectively, so no sliding friction occurs between the resins. Also, there is a gap G1 between washers 5 and 6 and pivot 4, and a gap G2 between annular raised edges 5a and 6a of washers 5 and 6 and shaft tube 8, so no sliding friction occurs between the metals. [Explanation of symbols]

[0021] 1 hinge 2 First Feather 2a 1st axis tube 2b 1st axis tube 3 Second Feather 3a 2nd axis tube 4. Axis 5 washers 5a Standing edge 6 washers 6a Standing edge 7. Bush 7a flange 8. Bush 8a flange 9. Bush 9a flange 10 Bush 10a flange 11 Washer G1 Gap G2 gap

Claims

1. a first blade made of metal having a plurality of first axial tubes arranged on the same axis and facing each other at a distance; a second blade made of metal having a second axial tube interposed between the first axial tubes with the axis aligned; a bushing made of synthetic resin, fitted into each of the opposing axial ends of the first and second axial tubes and having flanges abutting on the opposing end surfaces; a metal washer interposed between the opposing surfaces of the flanges; a pivot that is inserted through the first and second shaft tubes via the bush and the washer and connects the first and second blades, The washer has an annular raised edge that stands up with a height dimension smaller than the thickness dimension of the flange so as to engage with the outer periphery of either of the abutting flanges, thereby ensuring a gap between the two opposing flanges and also between the inner periphery of the washer and the outer periphery of the pivot shaft.

2. the pivot shaft has enlarged crimping portions at both ends protruding from the outer ends of the first shaft tubes of the first blades, 2. The hinge according to claim 1, wherein a metal washer is fixed to the pivot shaft and interposed between the crimped portion and the opposing outer end of the first axle tube.

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