JPH0612681U - Hinge - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an automatic return hinge with a simple structure that is capable of gently and surely returning to the open position when the door is opened from the closed position. [Composition] A damper (1) held by an outer frame (2), and a support shaft (4) slidably connected only in an axial direction to a rotation shaft (3) of the damper (1) The upper and lower inclined cam surfaces (5) and (6) formed in a spiral shape on the opposing surfaces of the support shaft (4) and the outer frame (2) around the rotation shaft (3), A structure in which either the support shaft (4) or the outer frame (2) is attached to the door side and the other is attached to the fixed side such as a floor surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hinge having a function of constantly urging a pivoting door in an opening direction, and is mainly used for a door of a collective toilet or the like.

[0002]

[Prior art]

 Conventionally, in a common toilet in a large store or large-volume building, the door is always kept open so that the state when not in use can be recognized from the outside. Conventionally, as means for this, there are one in which an inclined cam surface is provided on the pivoting tubular portion of the hinge so that the hinge is naturally returned to the open position by the weight of the door, and one which is returned to the open position by a spring.

[0003]

[Problems to be solved by the device]

 However, with such a conventional means, when the door is unlocked and the hand is released, the door is strongly rotated by the weight of the door or the reaction force of the spring, and abuts on the door stopper or the opposite wall surface to cause noise. It becomes a source of vibration and vibration, and there is a problem that rattling occurs in the attachment condition of the hinge and the door.

In view of the above, the present invention provides an automatic return hinge with a simple structure that gently and surely returns to the open state when the door is opened from the closed position, thereby eliminating the above-mentioned inconvenience. The main purpose is to do.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in the hinge according to the present invention, only the damper (1) held by the outer frame (2) and the rotating shaft (3) of the damper (1) are axially moved. A support shaft (4) slidably connected to the upper and lower sides, which are spirally formed on the opposing surfaces of the support shaft (4) and the outer frame (2) around the rotation shaft (3). Of the inclined cam surfaces (5) and (6), and either the support shaft (4) or the outer frame (2) is attached to the door side and the other is attached to the fixed side such as the floor surface. It has a structure that is used.

[0006]

[Action]

 With the hinge configured as described above, when the door (7) is opened from the closed position, the door is gently moved by the operation of the upper and lower inclined cam surfaces (5) (6) and the rotating shaft (3) of the damper (1). However, it surely returns to the open position, which can prevent noise and rattling due to a sudden collision with the door stopper.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment of the present invention, in which the hinge (A) includes a damper (1) held by an outer frame (2). The damper (1) is a viscous tamper containing silicone oil having a high viscosity coefficient inside. The rotary shaft (3) of the damper (1) is arranged vertically, and the support shaft (4) is connected to the rotary shaft (3) slidably only in the axial direction. Further, upper and lower inclined cam surfaces (5) (6) that are spirally inclined are formed on the surfaces of the support shaft (4) and the outer frame (2) facing each other around the rotating shaft (3), These two are arranged so as to be in contact with each other. Further, the support shaft (4) is connected to the door (8) via a mounting piece (7), and the outer frame (2) is mounted on the floor surface (9).

Now, in the state of FIG. 1, the door (8) is in the open position. When the door is closed from this state, the support shaft (4) rotates together with the rotation shaft (3) of the damper (1) to be in the state shown in FIG. In this position, the inclined cam surface (5) of the support shaft (4) is above the inclined upper cam surface (6) of the lower inclined cam surface (6), and the weight of the door always tries to return to the open position shown in FIG. Therefore, when the door (7) is released, the posture returns to the position shown in Fig. 1. At this time, since the support shaft (4) is connected to the damper rotation shaft (3), the resistance of the damper (1) causes a sudden change. Rotation is restricted, and it returns to the original position slowly and surely.

In the above embodiment, the support shaft (4) is attached to the door side, but as shown in FIG. 4, the outer frame (2) having the damper (1) is attached to the door ( It may be attached to 7), and the support shaft (4) may be attached to the floor surface (9). In addition, the present invention can be implemented by appropriately modifying it within the scope of having the constituent features and effects.

[0010]

[Effect of device]

 Since the present invention is configured as described above, when the door is opened from the closed position, the door is gently and surely returned to the open position by the operation of the upper and lower inclined cam surfaces and the rotating shaft of the damper. It is possible to prevent the occurrence of rattling and rattling due to a sudden collision with the door stopper, and the structure is simple, so it is small and inexpensive to manufacture.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a hinge according to the present invention.

FIG. 2 is a sectional view taken along line aa in FIG.

FIG. 3 is a sectional view showing the operation of the hinge.

FIG. 4 is a sectional view showing another embodiment of the hinge according to the present invention.

[Explanation of symbols]

 (1) Damper (2) Outer frame (3) Rotating shaft (4) Support shaft (5) Inclined cam surface (6) Inclined cam surface (7) Mounting piece (8) Door (9) Floor surface

Claims (1)

[Scope of utility model registration request] 1. A damper (1) held by an outer frame (2) and a support shaft (4) slidably connected only axially to a rotation shaft (3) of the damper (1). ) And upper and lower inclined cam surfaces (5) (6) spirally formed on the surfaces of the support shaft (4) and the outer frame (2) facing each other around the rotation shaft (3). Consists of said support shaft (4)
Alternatively, a hinge configured such that one of the outer frames (2) is attached to the door side and the other is attached to a fixed side such as a floor surface.