JP5090393B2 - hinge - Google Patents

Description

  The present invention relates to a hinge, and more particularly to a hinge used to open and close a lid of a container or the like.

  2. Description of the Related Art Conventionally, a hinge that can stand still with a pair of blades opened at a required angle is known. For example, Patent Document 1 includes a pair of blades composed of a swirl blade and a fixed blade, and a knuckle tube having a slide portion movable in the direction of the pivot, and the blade can swivel to a required angle around the pivot. A hinge is disclosed.

JP-A-10-205202

  According to the hinge disclosed in Patent Literature 1, the swirl vane attached to the lid of the cabinet can be stopped in a state where the swirl vane is opened at a required angle with respect to the fixed vane fixed to the main body. Accordingly, since it is not necessary to hold the lid by hand when the lid is opened, both hands of the operator are free, and the work for taking out the cargo can be performed smoothly.

  However, since the slide portion moves in the axial direction via the guide pin in the cylindrical knuckle tube, the efficiency of the force for turning the blade is low, and the guide pin tries to shear it. Since a force acts, it is necessary to form the guide pin and the slide portion with a relatively high strength material such as a metal member so that the load can be endured.

  It is an object of the present invention to provide a hinge that is an improvement of the above-described prior art and that can improve the efficiency of the force of turning the blades and can relatively reduce the number of parts.

  In order to solve the above-mentioned problems, the present invention relates to an improvement of a hinge including a pivot and a first and second blade having a knuckle tube extending in the direction of the pivot and pivotable about the pivot.

A feature of the present invention is that the first blade includes a fixed portion and a pair of first hollow portion and second hollow portion that are formed integrally with the fixed portion or are separably coupled to each other. The second blade has a movable part and a third hollow part formed integrally with the movable part or detachably coupled, and having a quadrangular cross section, the first, The knuckle tube is formed by the second and third hollow portions extending in series in the direction of the pivot, and the lid is fitted inside the first and second hollow portions at the outer edges thereof. A spring member that is elastically contractible in the pivot direction in the third hollow portion, and the pivot direction facing the lid portion and being urged in the pivot direction by the spring member A pair of slidable slide parts, and the lid part A substantially quadrangular first pedestal that abuts against the inner peripheral surface of the first pedestal, a substantially cylindrical first projection that projects from the first pedestal, and a first cam surface that is located on the first projection. And the slide portion includes a substantially quadratic second pedestal portion that non-rotatably contacts the inner peripheral surface of the knuckle tube, and a substantially circular second projecting portion that projects from the second pedestal portion. A second cam surface located on the second projecting portion and having an undulating shape corresponding to the shape of the first cam surface, and at least the first cam surface of the slide portion and the lid portion The part which forms is to be formed from a plastic member .

  In the present invention, since the inner surface of the knuckle tube and the portion of the sliding portion that contacts the inner surface of the knuckle tube have a square cross section, they are in contact with each other in a flat shape, and force to turn the blades. Can be directly applied to the slide portion. Further, by simplifying the structure, the number of parts can be relatively reduced, and the number of parts with irregularities in the outer shape can be reduced, so that the appearance is preferable.

The figure which shows the use condition of a hinge. The perspective view which shows the structure inside a hinge. The partially broken disassembled perspective view of a hinge. (A) The partially broken perspective view of a cover part. (B) The IV-IV sectional view taken on the line of FIG. (A) The partially broken perspective view of a slide part. (B) VV sectional view taken on the line of FIG. The perspective view of a cam mechanism. (A) The perspective view of a hinge in the state where the lid | cover was closed. (B) A partially enlarged view of the inside of the hinge with the lid closed. (A) The perspective view of a hinge in the state in which the lid | cover was opened. (B) The partially enlarged view inside a hinge in the state where the lid | cover was opened.

  FIG. 1 is a perspective view of a hinge 2 attached to the cabinet 1, FIG. 2 is a perspective view showing an internal state of the hinge 2, and FIG. 3 is a partially broken exploded perspective view of the hinge 2. In FIG. 2, the outer shape of the hinge 2 is represented by a virtual line so that the state inside the hinge 2 can be understood. The hinge 2 is formed symmetrically with respect to a center line (not shown) that is orthogonal to the pivot P and bisects its width dimension, and in the description of each component, only one of them is symmetrical. explain. Further, the opening angle of the swirl vane 4 is a required angle at which the swirl vane 4 opens with respect to the fixed vane 3 on the basis of the state where the lid 1b is closed (open angle 0 °) indicated by a virtual line in FIG. An angle.

  As shown in FIGS. 1 and 2, the hinge 2 includes a pair of pivots P, a fixed blade 3 fixed to the main body 1 a of the cabinet 1, and a swirl blade 4 rotatably attached to the lid 1 b of the cabinet 1. Includes blades 3 and 4.

  The lid 1b is swung in the direction of the arrow X from the state in which the operator holds the handle 5 and closes it (the position shown by the broken line), and the hand is moved to the 90 ° position (the position shown by the solid line). When released, it closes automatically by the action of the hinge and the dead weight of the lid 1b. On the other hand, when the hand is released after the lid 1b is further swung in the direction of the arrow X from the 90 ° position, the lid 1b falls down toward the back surface of the main body 1a.

  The fixed blade 3 includes a flat plate-like fixed portion 6 fixed to the main body 1a of the cabinet 1 and a pair of first hollow portions 7 formed integrally with the fixed portion 6 or coupled to each other in a separable manner. And the second hollow portion 8. Screw holes 9a and 9b are formed in the fixing portion 6 for fixing the fixed blade 3 to the lid 1b via screws.

  The swirl vane 4 is fixed to the lid 1b of the cabinet 1 and has a flat plate-like swivelable movable part 10 and a third section having a square cross section formed integrally with the movable part 10 or detachably coupled thereto. And a hollow portion 11. Screw holes 12a and 12b for fixing the hinge 2 to the lid 1b of the cabinet 1 via screws are formed in the turning part 10.

  Concave portions 13, 13 are formed on the outer surfaces of the first and second hollow portions 7, 8 of the fixed blade 3, and protrusions 14, 14 that are convex toward the pivot P are formed on the inner surfaces thereof. ing. The inner area and the shape of the hollow part of the first and second hollow parts 7 and 8 and the third hollow part 11 are substantially the same, and the third hollow part of the swirl blade 3 in the assembled state of the hinge 2 11 is located between the first hollow portion 7 and the second hollow portion 8 of the fixed blade 3, and the knuckle tube 15 is formed by these hollow portions 7, 11, 8 that extend in the direction of the pivot P. Is formed.

  Inside the knuckle tube 15, a coiled spring member 16 extending in the direction of the pivot P and elastically contracting in the direction of the pivot P, and a rod-like pin extending through the center of the spring member 16 in the direction of the pivot P The member 17 is inserted. Moreover, the cover part fitted by the outer end edge of the 1st and 2nd hollow parts 7 and 8 in the both ends of the knuckle pipe | tube 15, ie, the inside of the 1st hollow part 7 and the 2nd hollow part 8, respectively. 18 is arranged, and inside the third hollow portion 11, a slide portion 19 that is opposed to the lid portion 18 and is slidable in the direction of the pivot P within the knuckle tube 15 is arranged. Yes. The lid portion 18 and the slide portion 19 form a cam mechanism, and the two cam mechanisms are provided symmetrically in the knuckle tube 15.

  4A is a partially broken perspective view of the lid portion 18, FIG. 4B is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5A is a partially broken perspective view of the slide portion 19. 5B is a cross-sectional view taken along the line VV in FIG. 2, and FIG. 6 is a perspective view of the cam mechanism. In FIG.4 (b), the cover part 18 is shown with the virtual line.

  As shown in FIG. 4A, the lid portion 18 includes a substantially rectangular flange 21 for fitting the lid portion 18 to the outer end edges of the first and second hollow portions 7 and 8, and one of the flanges 21. The first pedestal portion 22 having a quadrangular cross section that is inserted into the knuckle tube 15 and the substantially cylindrical first protrusion portion 23 that protrudes from the first pedestal portion 22 are provided. The first pedestal portion 22 has substantially the same size as the inner peripheral edge of the knuckle tube 15, and when inserted into the knuckle tube 15, its outer peripheral surface cannot slide on the inner peripheral surface of the knuckle tube 15. It is in contact. Further, grooves 24 a and 24 b for fitting the protrusions 14 and 14 formed on the inner surfaces of the first and second hollow portions 10 and 11 are formed on the outer surface of the first pedestal portion 22.

  As shown in FIG. 4B, in the assembled state of the hinge 10, the protrusions 14 and 14 are fitted in the grooves 24a and 24b. The lid 18 is stably fitted to the first and second hollow portions 7 and 8 by these fittings and the fitting of the flange 21 that prevents the knuckle tube 15 from coming off. For example, the lid 18 is not inadvertently removed. Further, since the lid 18 can be pressed and fitted to the outer end edges of the first and second hollow portions 7 and 8 with a finger, the hinge 2 can be assembled without using a special tool or the like. .

  Referring to FIG. 4A again, a first cam surface 25 having an undulating shape is formed on the surface of the first projecting portion 23 of the lid portion 18, and the first pedestal portion 22 is formed at the center thereof. A bottomed hole 26 is formed extending to the bottom surface of the pin member 17 for inserting and fixing one end portion of the pin member 17. The inner diameter of the bottomed hole 26 is substantially equal to or slightly larger than the diameter of the pin member 17 in order to hold the pin member 17 in the knuckle tube 15 in a non-rotatable and stable manner.

  The first cam surface 25 has a flat top portion 25a, a trough portion 25b at a position facing the top portion 25a, and a smooth curve while inwardly inclining from both sides of the top portion 25a toward both sides of the trough portion 25b. The first and second inclined portions 25c and 25d are drawn.

  As shown in FIG. 5A, the slide portion 19 has a second pedestal portion 27 having a quadrangular cross section having the same outer shape as the inner surface of the knuckle tube 15, and an approximately protruding portion from one surface of the second pedestal portion 27. A second protrusion 28 having a columnar shape. A second cam surface 29 having an undulating shape corresponding to the shape of the first cam surface 25 of the lid portion 18 is formed on the surface of the second protruding portion 28. In addition, an insertion hole 30 for inserting the pin member 17 extending in the direction of the pivot P is formed at the center of the slide portion 19.

  As shown in FIG. 5B, the second pedestal portion 27 has a size substantially the same as the inner shape of the knuckle tube 15 (third hollow portion 11), and in the state where it is inserted into the knuckle tube 15, The entire outer peripheral surface is slidably in contact with the inner peripheral surface of the knuckle tube 15. Since the entire outer peripheral surface of the second pedestal portion 27 of the slide portion 19 is in contact with the inner peripheral surface of the knuckle tube 15 (third hollow portion 11), the second pedestal portion 27 rotates with the swirl vane 4 and swirls the swirl vane 4. The force can be applied to the slide portion 19 as it is.

  The second cam surface 29 has a flat top portion 29a, a valley portion 29b at a position facing the top portion 29a, and a smooth curve while inwardly inclining from both sides of the top portion 29a toward both sides of the valley portion 29b. And first and second inclined portions 29c and 29d extending.

  As shown in FIG. 6, the first cam surface 25 and the second cam surface 29 have a mirror shape so that they can be in close contact with each other. When the first cam surface 25 and the second cam surface 29 are in close contact with each other, the top portion 25a of the first cam surface 25 and the trough portion 29b of the second cam surface 29, and the trough portion 25b of the first cam surface 25 and the second cam. The top 29a of the surface 29 is in contact with each other, and the first and second inclined portions 25c, 25d of the first cam surface 25 are in contact with the first and second inclined portions 29c, 29d of the second cam surface 29; It has become.

  Referring again to FIG. 2, in the assembled state of the hinge 2, the pin member 17 is inserted into the insertion hole 30 of the second projecting portion 28 of the slide portion 19. Moreover, the both ends are inserted in the bottomed hole 26 of the 1st protrusion part 23 of the cover part 18, and the pin member 17 is hold | maintained in the knuckle pipe 15 so that insertion / extraction and rotation are impossible. Since the pin member 17 is inserted into the lid portion 18 and the slide portion 19, the slide portions 19, 19 arranged in the first hollow portion 7 and the second hollow portion 8, as described later, Rotating about the pivot P while sliding with the lid 18 does not shift the rotation axes of the cam mechanisms. Further, in the knuckle tube 15, both end portions of the spring member 17 are in contact with the surface of the slide portion 19 opposite to the surface from which the second projecting portion 28 of the second pedestal portion 27 projects, and the spring member 16. Always urges the slide part 19 outward in the direction of the pivot P.

  In the hinge 2 having such a configuration, when the swirl unit 10 of the swirl blade 4 is swung in the direction of swiveling the swirl blade 4 about the pivot P, that is, the direction X of opening the lid 1b of the cabinet 1 in FIG. 3 The slide part 19 which contacts the inner peripheral surface of the hollow part 11 also turns. When the slide portion 19 turns, the second cam surface 29 of the slide portion 19 rotates in the radial direction while sliding with the first cam surface 25 of the lid portion 18, and the slide portion 19 is biased by the spring member 16. It moves inward in the direction of the pivot P.

  On the other hand, when the lid 1b is closed, that is, when the swirl vane 4 is swung in the direction of arrow Y in FIG. 1, the second cam surface 29 of the slide portion 19 is on the first cam surface 25 of the lid portion 18. The slide portion 19 rotates in the direction opposite to the direction when the lid 1b is opened, and the slide portion 19 moves outward in the direction of the pivot P, that is, toward the lid portion 18 by the biasing force of the spring member 16.

  As described above, since the slide portion 19 has a quadrangular cross section, the slide portion 19 swirls together with the swirl vane 4, but does not itself rotate within the knuckle tube 15. Therefore, unlike a conventional hinge in which a cylindrical slide portion is arranged in a cylindrical knuckle tube, a pin member for preventing rotation of the pedestal portion of the slide portion and guiding movement in the axial direction ( No guide pin is required.

  Moreover, in the conventional hinge, since the force which tries to shear it was loaded on the guide pin, the guide pin, the slide portion, and the lid portion for receiving the guide pin and the lid portion are formed of a relatively high strength member, for example, a metal member. However, in the present invention, since the guide pin is unnecessary, the slide portion 19 and the lid portion 18 can be formed of a relatively low-strength and inexpensive material such as a plastic member.

  7A is a perspective view of the hinge in a state where the lid is closed, FIG. 7B is a partially enlarged view of the inside of the hinge in a state where the lid is closed, and FIG. A perspective view of the hinge in the opened state, FIG. 8B is a partially enlarged view inside the hinge in a state in which the lid 1b is opened 90 degrees. In FIG. 7B and FIG. 8B, the knuckle tube 15 is omitted for convenience of explanation.

  When the lid 1b of FIG. 7A is closed, that is, when the opening angle of the swirl blade 4 is 0 °, as shown in FIG. 7B, the top portion 29a of the second cam surface 29 of the slide portion 19 is obtained. However, it is located in the substantially intermediate part of the 1st inclination part 25c of the cover part 18. As shown in FIG. In this state, the slide portion 19 is urged outward in the direction of the pivot P by the spring member 16 in the knuckle tube 15. Since the force is acting on the lid 1b of the cabinet 1 in the direction Y in which the hinge 2 is intended to close the lid 1b, the lid 1b does not open due to an external impact or the like.

  When the lid 1b is lifted to open the lid 1b, that is, when the swirl vane 4 is swung around the pivot P against the bias of the spring member 16, the top of the second cam surface 29 of the slide portion 19 29a slides in the radial direction from the substantially intermediate portion of the first inclined portion 25c of the first inclined surface 25 of the lid portion 18 toward the top portion 25a. In this state, when the operator removes his / her hand from the lid 1b, the biasing force of the spring member 16 and the weight of the lid 1b apply a force in the direction Y to close the lid 1b, so that the lid 1b is automatically Close.

  As shown in FIG. 8A, when the swirl blade 4 is turned 90 °, the flat top portion 29 a of the second cam surface 29 is in contact with the flat top portion 25 a of the first cam surface 25. At this time, since the top portion 25a of the first cam surface 25 and the top portion 29a of the second cam surface 29 are formed flat, the movement of the top portion of the first cam surface temporarily stops.

  Further, when the swirl vane 4 is expanded to increase the opening angle to 90 ° or more, the top portion 29a of the second cam surface 29 moves toward the second inclined surface 25d of the first cam surface 25, and the second The second inclined portion 29d of the cam surface 29 slides on the second inclined surface 25d of the first cam surface 25 in the radial direction. At this time, a force in the X direction from the stationary state acts on the lid 1b, and the weight of the lid 1b is applied to the force, so that the opening angle of the swirl vane 4 slightly exceeds 90 °. Thus, the lid 1b moves to the rear vigorously. Therefore, when the lid 1b is lifted with a relatively large force from the closed state, there is a possibility that the upper surface of the lid 1b may collide with the rear surface of the main body 1a. Since the top portion 25a of the first cam surface 25 and the top portion 29a of the second cam surface 29 are formed in a flat shape, the lid 1b is temporarily stopped, so that the impact caused by the collision can be reduced.

  In the present embodiment, the swirl vane 4 is not adjusted so as to be stationary at a required position, but the first and second cam surfaces are shaped so that the opening angle is stationary at a position of 0 ° to 90 °. May be adjusted, or may be adjusted so as to be stationary at a plurality of positions. In addition, as long as the effects of the present invention are exhibited, only one of the first and second cam surfaces 25 and 29 may have a undulating shape as in the present embodiment.

  Furthermore, in the present embodiment, the second pedestal portion 27 of the slide portion 19 is formed in a quadrangular cross section so that it is brought into contact with the inner surface of the knuckle tube 15 in a planar shape. In other cases, other square shapes corresponding to the inner surface shape of the knuckle tube 15 may be used. Further, the outer shape of the knuckle tube 15 may be a cylindrical shape different from the inner surface shape.

  Naturally, the hinge 2 can be swung around the pivot axis P as well as the swivel blade 4 as well as the fixed blade 3. Therefore, the fixed blade 3 may be turned by attaching the fixed blade 3 to the lid 1b of the cabinet 1 and attaching the swirl blade 4 to the main body 1a.

2 Hinge 3 Fixed blade (first blade)
4 swirl blade (second blade)
15 Knuckle tube 16 Spring member 18 Lid portion 19 Slide portion 25 First cam surface 29 Second cam surface P Axis

Claims (1)

In a hinge including a pivot and a first blade and a second blade having a knuckle tube extending in the direction of the pivot and pivotable about the pivot,
The first blade includes a fixed portion, and a pair of first hollow portion and second hollow portion that are formed integrally with the fixed portion or are separably coupled to each other, and have a quadrangular cross section.
The second blade has a movable portion, and a third hollow portion having a quadrangular cross section formed integrally with the movable portion or coupled in a separable manner,
The knuckle tube is formed by the first, second and third hollow portions extending in series in the direction of the pivot,
A lid portion fitted to the outer edge of each of the first and second hollow portions is disposed, and the third hollow portion has a spring member that can be elastically contracted in the pivot direction, A pair of slide parts that are opposed to the lid part and are slidable in the pivot direction biased in the pivot direction by the spring member are arranged,
The lid portion includes a substantially quadrangular first pedestal portion that abuts against an inner peripheral surface of the knuckle tube, a substantially cylindrical first projection portion that projects from the first pedestal portion, and the first projection. A first cam surface located in the section,
The slide portion includes a substantially quadrangular second pedestal portion that abuts against the inner peripheral surface of the knuckle tube, a substantially circular second projection portion that projects from the second pedestal portion, and the second projection. And a second cam surface having an undulating shape corresponding to the shape of the first cam surface,
The hinge in which at least a portion forming the first cam surface of the first slide portion and the lid portion is formed of a plastic member.

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