JP4384076B2 - hinge - Google Patents

Description

  The present invention relates to a hinge used for a door of an apparatus for manufacturing a precision part such as a semiconductor or the like that needs protection from dust or dust, and an open / close door of a clean room.

  The hinge is generally composed of a pair of blades and a pivot shaft that is inserted into a knuckle tube of the blades and connects the blades, and is used as a connecting member such as an inspection door of a manufacturing apparatus or a doorway door. Normally, these blades and pivots are made of metal materials from the viewpoint of strength and durability, but at the contact parts between metals, metal wear pieces are scattered as dust by sliding friction to deteriorate the surrounding environment, and precision parts are It is not suitable for use at the manufacturing site. As a means to solve these problems, in order to avoid direct contact between metals, bushings and washers of oil-impregnated synthetic resin material having a hardness different from that of the metal material are interposed in the sliding portion to reduce friction. Powder scattering is prevented (Patent Document 1).

On the other hand, adopting a structure in which metal washers are interposed between bushes made of oil-impregnated synthetic resin interposed between metal materials, all materials are in contact with different materials with different hardness, further reducing the generation of wear dust There is a technology that made it possible. According to this technology, it is said that the materials having different hardnesses slide with each other and wear is greatly reduced (Patent Document 2).
Japanese Patent No. 3348062 JP 2000-204832 A

  In the technology disclosed in Patent Document 1, although generation of metal wear dust is suppressed, the oil-impregnated synthetic resin bush and washer interposed between the metal materials are still in sliding contact with each other. The wear dust of the member is generated, and the problem still remains.

  In the technique disclosed in Patent Document 2, it is inevitable that the metal washer and the metal pivot are in contact with each other, and the scattering of wear dust due to their sliding friction occurs.

  An object of the present invention is to solve the above-described problems, in the case where an oil-impregnated synthetic resin bush and a metal washer are employed in the sliding portion, the washer comes into contact with a metal pivot. To provide a hinge that adopts a configuration that can be avoided, thus preventing wear dust from being scattered around by sliding friction of those members and minimizing environmental pollution in which the hinge is used. is there.

The present invention for achieving the above object is provided between a first blade having a plurality of first knuckle tubes made of metal having an axial direction and facing each other in the axial direction, and the first knuckle tube. A second blade having a second knuckle tube made of metal and an axial direction in which the first and second knuckle tubes are fitted and fixed in inner end portions opposed to each other in the axial direction and contact the end surface of the inner end portion. A plurality of bushes made of oil-impregnated synthetic resin having flanges facing each other, a plurality of metal washers interposed between mutually facing surfaces of the flange in the axial direction, and the bush and the washers through the bushings A pivot that is inserted into the first and second knuckle tubes in the axial direction to connect the first and second blades, and a cap that is fitted and fixed in the outer end of each of the first knuckle tubes of the first blades. The one of the bushes opposed to each other in the axial direction protrudes from the flange of the bush toward the flange side of the other bush opposed to the bush. The washer is fitted to the annular protrusion, and the thickness dimension of the washer is larger than the protruding dimension of the annular protrusion protruding to the flange side, and therefore through the washer A gap is provided between the bushes facing each other in the axial direction so that the bushes including the washer are not in contact with each other, and when the first and second blades rotate relatively around the pivot axis, The sliding friction is generated on the contact surface between each of the opposing surfaces of the flange and the washer .

  The hinge according to the present invention preferably includes the following configuration modes.

  A mode in which an inner end surface of the cap abuts against an end surface of the pivot.

  The aspect in which the said bush has a taper taper in the edge part opposite to the said flange.

According to the present invention, with between and if the flange of the oil-containing synthetic resin bush washer metallic intervening one of the bush facing each other axially, from the flange of the bush of the bush opposite the said bush Since the washer is fitted to the annular projection protruding to the other flange side, the metal washer does not contact the metal knuckle tube and the metal pivot. Therefore, it is possible to prevent wear dust from being scattered around due to sliding friction between the washer, the knuckle tube and the pivot, and to achieve the intended purpose.

  The thickness dimension of the washer is larger than the projecting dimension of the annular projecting portion projecting toward the flange, and therefore the gap including the washer is not in contact with each other between the bushes facing each other in the axial direction via the washer. According to this, the bushes made of oil-impregnated synthetic resin do not come into contact with each other, and the dust is prevented from being scattered around by sliding friction between bushes, achieving the intended purpose more effectively. can do.

  According to the aspect in which the cap is fitted and fixed in the outer end portion of the first knuckle tube of the first blade and the aspect in which the inner end surface of the cap abuts against the end surface of the pivot, the pivot can be easily pinched from both ends. Can be assembled, and dust can be prevented from entering the hinge.

  According to the aspect in which the bush has a tapered taper at the end opposite to the flange, the fitting of the bush into the knuckle tube is facilitated, and therefore the assembly of the hinge is facilitated.

  Embodiments of the hinge according to the present invention will be described below with reference to the drawings.

  1-3, the hinge includes a pair of blades 10 and 11, a pivot 12, washers 13 and 14, bushes 15, 16, 17 and 18, and caps 19 and 20. 12 along the direction.

  The blades 10 and 11 are made of metal, and knuckle tubes 21 and 22 that are spaced apart from each other at one upper and lower end portions of the blade 10 in the direction of the pivot shaft 12, and a knuckle tube at one side central portion of the blade 11 in the same direction. A knuckle tube 23 interposed between 21 and 22 is formed. In addition, the blades 10 and 11 are provided with attachment holes 24 such as screws for objects such as doors to which hinges should be fixed.

  The bushes 15, 16, 17, and 18 are made of oil-containing synthetic resin, and flanges 25, 26, 27, and 28 are formed at one end, and tapers 29 are formed at the other end, respectively. The outer diameters of the bushes 15, 16, 17, and 18 except for the flanges 25, 26, 27, and 28 can be fitted and fixed to the knuckle tubes 21, 22, and 23, and the bushes and the knuckle tube cannot be rotated relatively. Have various dimensions. The outer diameters of the flanges 25, 26, 27 and 28 are smaller than the outer diameters of the knuckle tubes 21, 22 and 23. Among the bushes 15, 16, 17, 18, the bushes 15, 18 are on the opposite surfaces of the flanges 26, 27, respectively, and have the outer diameter dimensions and washers 13, 14 substantially equal to the outer diameter of the bushes 15, 16, 17, 18. Annular projections 31 and 32 having projecting dimensions smaller than the thickness dimension are formed.

  The pivot 12 is made of metal and has an outer diameter dimension that allows the pivots 12 to be slidably inserted into the bushes 15, 16, 17 and 18.

  Washers 13 and 14 are made of metal and have a flat round shape. The outer diameters of the washers 13 and 14 are substantially the same as the outer diameters of the knuckle pipes 21, 22 and 23 (preferably slightly smaller) and larger than the outer diameters of the flanges 25, 26, 27 and 28. Yes.

  The caps 19 and 20 are made of synthetic resin or rubber and have flanges 33 that come into contact with the outer ends of the knuckle pipes 21 and 22. The caps 19 and 20 can be fitted and fixed to the knuckle pipes, and the inner end surfaces of the caps are It can contact the end surface of the pivot shaft 12.

  In the hinge according to the present invention having the above-described members, as shown in FIGS. 2 and 3, the knuckle tube 21 of the blade 10 has a bush 15 from its inner end, and the knuckle tube 23 of the blade 11 has a bush 15 from both ends. The bushes 18 and 17 are fitted and fixed to the knuckle tube 22 of the blade 10 from the inner end thereof.

  In such a fixed state, the flange 25 of the bush 15 is on the end surface of the inner end portion of the knuckle tube 21 of the blade 10, the flanges 26 and 27 of the bushes 16 and 17 are on the end surfaces of both ends of the knuckle tube 23 of the blade 11, and The flange 28 of the bush 18 is in contact with the end surface of the inner end portion of the knuckle tube 22 of the blade 10.

  Thus, the washer 13 is provided between the flanges 25 and 26 of the bushes 15 and 16 facing each other in the direction of the pivot axis 12, and the washer 14 is provided between the flanges 27 and 28 of the bushes 17 and 18 facing each other in the same direction. Intervened. In this intervening state, the washer 13 is fitted into the annular projection 31 of the bush 15 and the washer 14 is fitted into the annular projection 32 of the bush 18. Therefore, the washers 13 and 14 do not contact the pivot 12 and the knuckle tubes 21, 22 and 23.

  In the hinge according to the present invention configured as described above, the washer 13 is interposed between the annular protrusion 31 of the bush 15 and the flange 26 of the bush 16 opposed thereto as shown in FIG. Similarly, a gap 35 is provided between the annular protrusion 32 of the bush 18 and the flange 27 of the bush 17 facing the bush 18 via the washer 14. These gaps are due to the dimension in which the thickness of each of the washers 13 and 14 is larger than the projecting dimension of each of the annular protrusions 31 and 32.

  For example, when the door to which the hinge according to the present invention is attached is opened and closed, the blades 10 and 11 pivot relative to each other about the pivot 12, and the bushes 15, 16, 17, and 18 pass through the washers 13 and 14. The knuckle tubes 21, 22, 23 are slidably rotated around the pivot 12. During the sliding movement, the bushes 15, 16, 17, 18 including the flanges 25, 26, 27, 28 and the annular protrusions 31, 32 and the contact surface of the pivot 12, the flange 25 of the washer 13 and the bush 15, and the annular protrusions. Sliding friction occurs on the contact surface with the portion 31 and on the contact surface between the washer 13 and the flange 26 of the bush 16. However, during the sliding rotation, there is a gap 34 between the bush 15 including the flange 25 and the annular protrusion 31 and the bush 16 including the flange 26 opposed thereto, and the bush 17 including the flange 27 and the bush 17. Since the bushes 18 including the opposing flange 28 and the annular protrusion 32 are provided with the gaps 35, no sliding friction occurs between the bushes 15 and 16 and between the bushes 17 and 18. It should be noted that the contact surfaces of the knuckle tubes 21, 22, 23 and the bushes 15, 16, 17, 18 are also fixed by fitting the bushes into the knuckle tubes. In the meantime, no sliding friction occurs.

The top view of the hinge which concerns on this invention. The expanded sectional view which follows the 2-2 line of FIG. The exploded perspective view of the hinge.

Explanation of symbols

10 First blade 11 Second blade 12 Axis 13, 14 Washer 15, 16, 17, 18 Bush 19, 20 Cap 21, 22, 23 Knuckle tube 25, 26, 27, 28 Flange 29 Tapered taper 31, 32 Annular protrusion 33 Flange 34, 35 Gap

Claims (3)

A first blade having a plurality of first knuckle tubes made of metal having an axial direction and facing each other in the axial direction, and a second having a second knuckle tube made of metal interposed between the first knuckle tubes. Made of oil-impregnated synthetic resin having a flange and a flange that is fitted into and fixed to the inner end portions of the first and second knuckle pipes facing each other in the axial direction and is in contact with the end surfaces of the inner end portions and facing each other in the axial direction A plurality of bushes, a plurality of metal washers interposed between the opposed surfaces of the flange in the axial direction, and the axial direction to the first and second knuckle pipes via the bush and the washers A hinge that is inserted into and connected to the first and second blades, and a cap that is fitted and fixed in the outer end of each of the first knuckle tubes of the first blade,
One of the bushes opposed to each other in the axial direction has an annular projection protruding from the flange of the bush toward the flange of the other bush opposed to the bush, and the washer is attached to the annular projection. Mated,
The thickness dimension of the washer is larger than the projecting dimension of the annular projecting portion projecting toward the flange, and thus the bushes including the washer are mutually interposed between the bushes facing each other in the axial direction via the washer. There is a gap to prevent contact ,
The hinge according to claim 1, wherein when the first and second blades are pivoted relative to each other about the pivot axis, sliding friction is generated on a contact surface between each of the opposed surfaces of the flange and the washer .   The hinge according to claim 1, wherein an inner end surface of the cap abuts against an end surface of the pivot shaft.   The hinge according to claim 1, wherein the bush has a tapered taper at an end opposite to the flange.

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