JP7106113B2 - gravity hinge - Google Patents

Description

The present invention relates to gravity hinges.

Gravity hinges are used to hold glass doors used in bathrooms (Patent Document 1). 24 and 25 (a) and (b) are explanatory diagrams of a conventional gravity hinge. In FIG. 24, A is a base side member fixed to the door frame Y, B is a door side member fixed to the door X, C is a shaft member inserted into both the base side member A and the door side member B, and D is It is a door holding member that holds the door X. The base side member A is provided with a base side cam member E, and the door side member B is provided with a door side cam member F. As shown in FIGS. 25(a) and 25(b), four gentle slopes E1 to E4 and F1 to F4 (slope F3 is not shown) are provided on the upper surfaces of both cam members E and F, respectively. It is The respective gradients of the inclined surfaces E1 to E4 and F1 to F4 are set within a range of approximately 10 degrees to 30 degrees.

JP 2007-46252 A

Since the upper surface of the base-side cam member E and the bottom surface of the door-side cam member F of the gravity hinge are formed of smooth inclined surfaces E1 to E4 (F1 to F4), the door can be opened and closed smoothly. can be done. On the other hand, when a ventilation fan is used to ventilate the bathroom, if a force (hereinafter referred to as "pull-in force") acts on the door to pull it into the bathroom, the door will open and water will flow out of the bathroom. There was a difficulty.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the problem to be solved is to provide a gravity hinge that can eliminate the inconvenience caused by the pulling force generated in the door while ensuring the smooth opening and closing of the door. That's what it is.

The gravity hinge of the present invention includes a first member (e.g., base side member) fixed to one of the periphery of the opening and the door that opens and closes the opening, and a second member (e.g., , door-side member) and a shaft member that is inserted into both the first member and the second member and supports both vertically movable and horizontally rotatable members. The inclined surfaces of both or one of the cam members are provided with a steeper slope portion than the other portion that constitutes the inclined surface, and when the door rotates, a part of the other cam member is inclined to the steep slope. The rotation of the door in the pull-in direction is restricted by contacting the part. Here, "regulation" in the present application means that the reaction force (resistance) is increased.

In the gravity hinge of the present invention, the inclined surface of either the first cam member or the second cam member is provided with a steep slope portion steeper than the other portion, and the steep slope portion is used to pull the door in the retracting direction. Since the rotation is restricted, the door will not open even if a pull-in force is generated inside the room due to the use of the ventilation fan, and the inconvenience of water leaking out of the bathroom is less likely to occur. In addition, since the entire slope is not made steep, but a portion where the slope is not steep (gentle slope portion) is left, smooth opening and closing of the door can be ensured.

The front view which shows the usage example of the gravity hinge of this invention. 1 is an exploded perspective view showing a first embodiment of a gravity hinge of the present invention; FIG. (a) is an upper right perspective view of the base side cam member of the gravity hinge shown in FIG. 2, and (b) is an upper left perspective view of the base side cam member of the gravity hinge shown in FIG. (a) is a front view of the base side cam member shown in FIGS. 3 (a) and (b), (b) is a rear view of (a), (c) is a left side view of (a), (d) is ( (a) is a right side view, (e) is a plan view of (a), and (f) is a bottom view of (a). (a) is a lower right perspective view of the door side cam member of the gravity hinge shown in FIG. 2, (b) is a lower left perspective view of the door side cam member of the gravity hinge shown in FIG. (a) is a front view of the door side cam member shown in FIGS. 5 (a) and (b), (b) is a rear view of (a), (c) is a left side view of (a), (d) is ( (a) is a right side view, (e) is a plan view of (a), and (f) is a bottom view of (a). (a) is an explanatory diagram showing a state in which the base-side cam member is press-fitted into the base-side housing portion, and (b) is a door-side cam member of the door-side member on top of the base-side cam member press-fitted into the base-side housing portion. is an explanatory diagram showing a state in which . (a) is an explanatory view of the engaging portion between the base-side cam member and the door-side cam member when the door is closed, and (b) is the engagement between the base-side cam member and the door-side cam member when the door is opened 10 degrees. Explanatory drawing of a joining part. (a) is an explanatory diagram of the engaging portion of the base-side cam member and the door-side cam member with the door opened 70 degrees, and (b) is the base-side cam member and the door-side cam member with the door opened 90 degrees. Explanatory drawing of the engagement part of FIG. (a) is an upper right perspective view of the base side cam member in the second embodiment of the gravity hinge, and (b) is an upper left perspective view of the base side cam member in the second embodiment of the gravity hinge. (a) is a front view of the base side cam member shown in FIGS. 10 (a) and (b), (b) is a rear view of (a), (c) is a left side view of (a), (d) is ( (a) is a right side view, (e) is a plan view of (a), and (f) is a bottom view of (a). (a) is a lower right perspective view of the door side cam member in the second embodiment of the gravity hinge, (b) is a lower left perspective view of the door side cam member in the second embodiment of the gravity hinge. (a) is a front view of the door side cam member shown in FIGS. 12 (a) and (b), (b) is a rear view of (a), (c) is a left side view of (a), (d) is a (a) is a right side view, (e) is a plan view of (a), and (f) is a bottom view of (a). (a) is an explanatory view showing a state in which the base-side cam member of FIGS. 10 (a) and (b) is press-fitted into the base-side accommodating portion; is an explanatory diagram showing a state in which the door-side cam member of the door-side member is arranged in FIG. (a) is an explanatory diagram of the engaging portion of the base side cam member and the door side cam member with the door closed, and (b) is the engagement portion of the base side cam member and the door side cam member with the door opened 20 degrees. Explanatory drawing of a joining part. (a) is an explanatory diagram of the engaging portion of the base-side cam member and the door-side cam member with the door opened 70 degrees, and (b) is the base-side cam member and the door-side cam member with the door opened 90 degrees. Explanatory drawing of the engagement part of FIG. (a) is an upper right perspective view of a base-side cam member in a third embodiment of the gravity hinge, and (b) is an upper left perspective view of the base-side cam member in the third embodiment of the gravity hinge. (a) is a front view of the base side cam member shown in FIGS. 17(a) and (b), (b) is a rear view of (a), (c) is a left side view of (a), (d) is ( (a) is a right side view, (e) is a plan view of (a), and (f) is a bottom view of (a). (a) is a lower right perspective view of the door side cam member in the third embodiment of the gravity hinge, (b) is a lower left perspective view of the door side cam member in the third embodiment of the gravity hinge. (a) is a front view of the door side cam member shown in FIGS. 19(a) and (b), (b) is a rear view of (a), (c) is a left side view of (a), (d) is (a) is a right side view, (e) is a plan view of (a), and (f) is a bottom view of (a). (a) is an explanatory view showing a state in which the base-side cam member of FIGS. 17 (a) and (b) is press-fitted into the base-side accommodating portion; is an explanatory diagram showing a state in which the door-side cam member of the door-side member is arranged in FIG. (a) is an explanatory view of the engaging portion between the base-side cam member and the door-side cam member when the door is closed, and (b) is the engagement between the base-side cam member and the door-side cam member when the door is opened 10 degrees. Explanatory drawing of a joining part. (a) is an explanatory diagram of the engaging portion of the base-side cam member and the door-side cam member with the door opened 70 degrees, and (b) is the base-side cam member and the door-side cam member with the door opened 90 degrees. Explanatory drawing of the engagement part of FIG. FIG. 2 is an exploded perspective view showing an example of a conventional gravity hinge; (a) shows a state in which a conventional base-side cam member is press-fitted into the base-side accommodating portion; It shows the state in which the members are arranged.

(Embodiment 1)
A first embodiment of the gravity hinge 1 of the present invention will be described with reference to FIGS. 1 to 9(a) and (b). The gravity hinge 1 of this embodiment is suitable for holding various doors, particularly glass doors installed in private rooms such as bathrooms that require ventilation. In FIG. 1, 1 is a gravity hinge, X is a door, Y is a door frame, and Z is a door stop provided on the door frame.

FIG. 2 shows an exploded view of the gravity hinge 1 shown in FIG. In FIG. 2, 3 is a base side member fixed to the door frame Y, 4 is a door side member fixed to the door X, 5 is a shaft member inserted into both the base side member 3 and the door side member 4, and 6 is It is a door holding member that holds the door X.

As shown in FIG. 2, the base-side member 3 includes a base (hereinafter referred to as "base-side base") 31 fixed to the door frame Y and a cam member (hereinafter referred to as "base-side cam member") 32. As shown in FIG. The base-side substrate 31 has a vertically elongated plate-shaped fixing portion 31a fixed to the door frame Y, and a tubular portion 31b provided in the lower half of the fixing portion 31a.

The fixing portion 31a is provided with a plurality of (three in the illustrated example) screw holes 31c. The base-side substrate 31 is fixed to the door frame Y with screws 31d inserted into the screw holes 31c. The cylindrical portion 31b is provided with a base-side accommodating portion 31e having an upper opening 31f, and the base-side cam member 32 is press-fitted into the base-side accommodating portion 31e.

As shown in FIGS. 2, 3(a) and 3(b), the base-side cam member 32 includes a press-fit portion 32a that fits in the base-side housing portion 31e, a large-diameter portion 32b provided above the press-fit portion 32a, and a large-diameter portion 32b. A flange portion 32c provided above the diameter portion 32b and a cam portion 32d projecting upward from the flange portion 32c are provided. The press-fit portion 32a has a tubular shape with a bottomed insertion hole 32e for inserting the shaft member 5, and has four longitudinal ribs 32f on its outer periphery.

As shown in FIGS. 3(a)(b) and 4(a) to (f), the upper surface of the cam portion 32d of the base-side cam member 32 has four continuous inclined surfaces (hereinafter referred to as respective inclined surfaces). are referred to as "first inclined surface 33", "second inclined surface 34", "third inclined surface 35", and "fourth inclined surface 36"). A first mountain portion composed of the surface 33 and the second inclined surface 34 and a second mountain portion composed of the third inclined surface 35 and the fourth inclined surface 36), and two valleys (the fourth inclined surface 36 and A first valley portion composed of the first inclined surface 33 and a second valley portion composed of the second inclined surface 34 and the third inclined surface 35 are formed. Between the first inclined surface 33 and the second inclined surface 34 is the first peak T1 of the first peak, and between the third inclined surface 35 and the fourth inclined surface 36 is the second peak T2 of the second peak. However, between the fourth inclined surface 36 and the first inclined surface 33, a first bottom portion B1 is formed, and between the second inclined surface 34 and the third inclined surface 35, a second bottom portion B2 is formed.

Each of the inclined surfaces 33 to 36 includes valley-side inclined portions 33a, 34a, 35a, 36a, middle-side inclined portions 33b, 34b, 35b, 36b, and mountain-side inclined portions 33c, 34c, 35c, 36c. The middle slopes 33b, 34b, 35b, 36b are steeper than the valley slopes 33a, 34a, 35a, 36a and the peak slopes 33c, 34c, 35c, 36c. Specifically, the slopes of the valley side slopes 33a, 34a, 35a, and 36a are about 22 degrees, the slopes of the middle slopes 33b, 34b, 35b, and 36b are about 60 degrees, and the mountain side slopes 33c, 34c, 35c, and 36c is about 22 degrees. In this embodiment, the middle slopes 33b, 34b, 35b, 36b hit the steep slopes. In this embodiment, the middle inclined portions 33b, 34b, 35b, and 36b are provided at positions near the mountain side inclined portions 33c, 34c, 35c, and 36c of the respective inclined surfaces 33 to 36. , 35b, 36b can also be provided at positions different from those shown.

The angle of each inclined portion is an example, and other angles may be used. For example, the slopes of the gentle slopes (in this embodiment, the valley side slopes 33a, 34a, 35a, 36a and the mountain side slopes 33c, 34c, 35c, 36c) can be any angle between 15 degrees and 45 degrees. , The steep slope portions (in this embodiment, the middle slope portions 33b, 34b, 35b, and 36b) can be set to an arbitrary angle of 45 degrees to 75 degrees on the premise that the slope is steeper than the gentle slope portion. . It is necessary to set the slope of each inclined portion in consideration of the width of the rise of the door (the width of the rise of the door when the door is opened). For example, if the upper limit of the width of the rise is set to 5 mm or less, the slope of each slope is set so that the door does not move up and down by more than 5 mm, and the upper limit of the width of the rise is set to 8 mm or less. , set the slope of each ramp so that the door does not move up or down more than 8 mm. In either case, consideration is given to a shape that conforms to the shape of the cam portion 42c of the door-side cam member 42 (slope of each inclined surface).

The door-side member 4 includes a door-side base 41 attached to the door X and a door-side cam member 42 press-fitted into the tubular portion 41b of the door-side base 41, as shown in FIG. The door-side substrate 41 includes a vertically elongated plate-like fixed portion 41a fixed to the door X, and a cylindrical portion 41b provided on the side of the fixed portion 41a. Two cylindrical screw receiving portions 41c are vertically spaced apart from each other and protrude from the back side of the fixing portion 41a. The cylindrical portion 41b is provided with a door-side accommodation portion 41e having a bottom opening 41f, and a door-side cam member 42 is press-fitted into the door-side accommodation portion 41e.

As shown in FIGS. 2 and 5(a) and (b), the door-side cam member 42 includes a press-fit portion 42a accommodated in the door-side housing portion 41e, a flange portion 42b provided below the press-fit portion 42a, and a flange portion. A cam portion 42c protruding downward from 42b is provided. The press-fitting portion 42a has a cylindrical shape with a bottomed insertion hole 42d for inserting the shaft member 5, and has four vertically long ribs 42e on its outer circumference.

The cam portion 42c of the door-side cam member 42 has four continuous inclined surfaces (hereinafter referred to as "first inclined surface 43", "second inclined surface 44", "third inclined surface 45", and "fourth inclined surface"). The inclined surfaces 43 to 46 form two mountain portions (a first mountain portion composed of a first inclined surface 43 and a second inclined surface 44 and a third inclined surface 45 and a fourth inclined surface 45). and two valleys (the first valley composed of the fourth inclined surface 46 and the first inclined surface 43, and the second inclined surface 44 and the third inclined surface 45). A configured second valley) is formed. Between the first inclined surface 43 and the second inclined surface 44 is the first peak T1 of the first peak, and between the third inclined surface 45 and the fourth inclined surface 46 is the second peak T2 of the second peak. However, between the fourth inclined surface 46 and the first inclined surface 43, a first bottom portion B1 is formed, and between the second inclined surface 44 and the third inclined surface 45, a second bottom portion B2 is formed.

Each of the inclined surfaces 43 to 46 includes valley side inclined portions 43a, 44a, 45a and 46a, intermediate inclined portions 43b, 44b, 45b and 46b, and mountain side inclined portions 43c, 44c, 45c and 46c. The middle slopes 43b, 44b, 45b, 46b are steeper than the valley slopes 43a, 44a, 45a, 46a and the peak slopes 43c, 44c, 45c, 46c. Specifically, the slopes of the valley side slopes 43a, 44a, 45a and 46a are about 22 degrees, the slopes of the middle slopes 43b, 44b, 45b and 46b are about 60 degrees, and the mountain side slopes 43c, 44c, 45c and 46c is about 22 degrees. In this embodiment, the middle slopes 43b, 44b, 45b, 46b hit the steep slopes. In this embodiment, the middle inclined portions 43b, 44b, 45b, and 46b are provided at positions near the valley side inclined portions 43a, 44a, 45a, and 46a of the respective inclined surfaces 43 to 46. 44b, 45b, 46b can also be provided at positions different from those shown.

The angle of each inclined portion is an example, and other angles may be used. For example, the slopes of the gentle slopes (in this embodiment, the valley-side slopes 43a, 44a, 45a, and 46a and the mountain-side slopes 43c, 44c, 45c, and 46c) can be any angle between 15 degrees and 45 degrees. , the steep slope portions (in this embodiment, the middle slope portions 43b, 44b, 45b, and 46b) can be set to an arbitrary angle of 45 degrees to 75 degrees on the premise that the slope is steeper than the gentle slope portion. . It is necessary to set the slope of each inclined part in consideration of the width of the door rise. For example, if the upper limit of the width of the rise is set to 5 mm or less, the slope of each slope is set so that the door does not move up and down by more than 5 mm, and the upper limit of the width of the rise is set to 8 mm or less. , set the slope of each ramp so that the door does not move up or down more than 8 mm. In either case, consideration is given to a shape that conforms to the shape of the cam portion 32d of the base-side cam member 32 (slope of each inclined surface).

The shaft member 5 connects the base side member 3 and the door side member 4 . As an example, the shaft member 5 shown in FIG. 2 is a vertically long rod-shaped member. One end side (upper end side in the example shown in FIG. 2) of the shaft member 5 is tapered. About the lower half of the shaft member 5 in the longitudinal direction is accommodated in the insertion hole 32e of the base-side cam member 32, and the remaining part is accommodated in the insertion hole 42d of the door-side cam member 42. As shown in FIG. The shaft member 5 inserted into both insertion holes 32e and 42d is not fixed in both insertion holes 32e and 42d but is inserted in a rotatable state.

The door holding member 6 is a member for holding the door X in cooperation with the fixing portion 41a of the door side member 4. As shown in FIG. As an example, the door holding member 6 shown in FIG. A pinching piece 63 disposed on the opposite side of the fixing portion 41a with the door X interposed therebetween; two fixing screws 64 for fixing the fixing portion 41a, the plate-like packing 61, the door X, the plate-like packing 61, and the pinching piece 63; A washer 65 intervening when fixing the fixing screw 64 and a cover 66 covering the clamping piece 63 are provided.

The plate-shaped packing 61 is a rubber material having approximately the same size as the fixing portion 41a, and is a member that is applied to the front and back surfaces of the door X. As shown in FIG. The shape of the plate-shaped packing 61 is an example, and other shapes may be used. The plate-shaped packing 61 may be made of resin, vinyl, or other materials other than rubber. Through-holes 61a through which fixing screws 64 can pass are provided in the two plate-shaped packings 61 at intervals in the vertical direction. The position and number of the through-holes 61a may be determined according to the door X.

The cylindrical packing 62 is a member that is fitted in a through hole (not shown) provided in the door X while covering the outside of the screw receiving portion 41c. Cylindrical packing 62 absorbs the impact on the periphery of the through-hole provided in door X and screw receiving portion 41c. The cylindrical packing 62 can be made of resin, vinyl, rubber, or the like.

The clamping piece 63 is attached to the door X from the opposite side of the fixing portion 41a of the door-side member 4, and clamps the door X in cooperation with the fixing portion 41a. As an example, the clamping piece 63 shown in FIG. Through holes 63a through which the fixing screws 64 can pass are provided in the clamping piece 63 at intervals in the vertical direction. The position and number of the through-holes 63a may be determined according to the door X.

The cover 66 is a member that covers the clamping piece 63 . As an example, the cover shown in FIG. 2 is in the form of a vertically elongated dish that covers the outer surface and the outer peripheral surface of the clamping piece 63 . After fixing with the fixing screws 64, the fixing screws 64 and the like can be hidden by covering the clamping pieces 63 with a cover 66. - 特許庁

When the door holding member 6 configured as described above is used, as shown in FIG. In this state, the door X can be held by screwing a fixing screw 64 inserted from the outside of the clamping piece 63 into the screw receiving portion 41c of the door-side member 4 .

(Operation of Gravity Hinge of Embodiment 1)
The operation of the gravity hinge 1 of this embodiment will be described with reference to FIGS. 8(a)(b) and 9(a)(b). FIG. 8(a) shows the gravity hinge 1 with the door X closed, FIG. 8(b) shows the gravity hinge 1 with the door X opened 10 degrees, and FIG. The gravity hinge 1 is shown with the door X opened 70 degrees, and FIG. 9(b) shows the gravity hinge 1 with the door X opened 90 degrees.

When the door X is closed, the intermediate inclined portion 44b of the second inclined surface 44 of the door-side cam member 42 abuts against the intermediate inclined portion 33b of the first inclined surface 33 of the base-side cam member 32 (Fig. 8(a)). )). When the door X is opened up to 10 degrees from this state, the intermediate inclined portion 44b of the second inclined surface 44 climbs over the intermediate inclined portion 33b of the first inclined surface 33 of the base-side cam member 32 and rides on the mountain-side inclined portion 33c (Fig. 8(b)). When the door X is further opened to 70 degrees, the first top T1 of the door-side cam member 42 reaches the first top T1 of the base-side cam member 32 (Fig. 9(a)). When the door X is opened up to 90 degrees from this state, the first top portion T1 of the door-side cam member 42 climbs over the first top portion T1 of the base-side cam member 32, and the second inclined surface 34 of the base-side cam member 32 reaches the mountain side. It descends along the inclined portion 34c (FIG. 9(b)).

The door X, which is held by the gravity hinge 1 that operates as described above, has a large angle between the closed state and the middle inclined portion 33b (steeply inclined portion) of the first inclined surface 33 of the base-side cam member 32 until it climbs over the first inclined surface 33. The reaction force makes it difficult to open the door X, and when the door X goes over the middle inclined portion 33b and enters the mountain side inclined portion 33c, the reaction force becomes smaller and the door X becomes easier to open. Therefore, by setting the angle of the steep slope portion to an angle that cannot be exceeded by the pulling force generated by using the ventilating fan, it is possible to prevent the door X from being carelessly opened when using the ventilating fan. In addition, in this embodiment, each inclined surface is provided with a gentle slope portion, so compared to the case where the entire inclined surface is steep, the ease of opening the door is less likely to be hindered. Furthermore, if the entire slope is steep, the door may move excessively up and down, but in this embodiment, each slope is provided with a gentle slope, so there is no such concern.

The reason why the door-side cam member 42 does not descend along the first inclined surface 33 (trough-side inclined portion 33a) of the base-side cam member 32 when the door X is closed (FIG. 8A) is that This is because the door X collides with the door stopper Z of the door frame Y and does not rotate any more. The reason why the door-side cam member 42 does not move down along the fourth inclined surface 36 (mountain-side inclined portion 36c) of the base-side cam member 32 when the door X is opened 90 degrees (FIG. 9B) is that the door This is because X collides with a doorstop (not shown) and does not rotate any further.

(Embodiment 2)
A second embodiment of the gravity hinge 1 of the present invention will be described with reference to FIGS. 10(a)(b) to 16(a)(b). The basic configuration of the gravity hinge 1 of this embodiment is the same as that of the first embodiment. What is different is the structure of the cam portion 32 d of the base side cam member 32 and the cam portion 42 c of the door side cam member 42 . The following description will focus on portions that differ from the first embodiment, and descriptions of common portions will be omitted as appropriate.

As shown in FIGS. 10(a)(b) and 11(a) to (f), the upper surface of the cam portion 32d of the base-side cam member 32 of this embodiment has four continuous inclined surfaces (first inclined surfaces). A surface 33, a second inclined surface 34, a third inclined surface 35 and a fourth inclined surface 36) are provided, and the inclined surfaces 33 to 36 form two mountain portions (the first inclined surface 33 and the second inclined surface 34). The first peak portion and the second peak portion composed of the third inclined surface 35 and the fourth inclined surface 36), and the two valley portions (the second peak portion composed of the fourth inclined surface 36 and the first inclined surface 33) A first valley portion and a second valley portion composed of the second inclined surface 34 and the third inclined surface 35 are formed. Between the first inclined surface 33 and the second inclined surface 34 is the first peak T1 of the first peak, and between the third inclined surface 35 and the fourth inclined surface 36 is the second peak T2 of the second peak. However, between the fourth inclined surface 36 and the first inclined surface 33, a first bottom portion B1 is formed, and between the second inclined surface 34 and the third inclined surface 35, a second bottom portion B2 is formed.

Each of the inclined surfaces 33 to 36 includes valley-side inclined portions 33a, 34a, 35a, 36a, projecting peak portions 33d, 34d, 35d, 36d, and mountain-side inclined portions 33c, 34c, 35c, 36c. The valley-side slopes 33a, 34a, 35a, 36a are steeper than the peak-side slopes 33c, 34c, 35c, 36c. Specifically, the slopes of the valley-side slopes 33a, 34a, 35a, and 36a are about 60 degrees, and the slopes of the mountain-side slopes 33c, 34c, 35c, and 36c are about 22 degrees. The protruding peaks 33d, 34d, 35d, and 36d are mountain-shaped portions formed between the valley-side slopes 33a, 34a, 35a, and 36a and the peak-side slopes 33c, 34c, 35c, and 36c. Middle valley portions 33e, 34e, 35e, and 36e, which are one step lower than the peak portions 33d, 34d, 35d, and 36d, are provided between the peak portions 33d, 34d, 35d, and 36d and the mountain-side inclined portions 33c, 34c, 35c, and 36c. is formed. In this embodiment, the peak portions 33d, 34d, 35d, and 36d are provided at positions near the peak-side inclined portions 33c, 34c, 35c, and 36c of the respective inclined surfaces 33 to 36. , 35d and 36d can also be provided at positions different from those shown.

The angle of each inclined portion is an example, and other angles may be used. For example, the slopes of the gentle slopes (in this embodiment, the mountain side slopes 33c, 34c, 35c, 36c) can be any angle between 15 degrees and 45 degrees, and the steep slopes (in this embodiment, the valley side The inclined portions 33a, 34a, 35a, 36a) can be set at an arbitrary angle of 45 degrees to 75 degrees on the premise that they are steeper than the gentle slope portion. It is necessary to set the slope of each inclined part in consideration of the width of the door rise. For example, if the upper limit of the width of the rise is set to 5 mm or less, the slope of each slope is set so that the door does not move up and down by more than 5 mm, and the upper limit of the width of the rise is set to 8 mm or less. , set the slope of each ramp so that the door does not move up or down more than 8 mm. In either case, consideration is given to a shape that conforms to the shape of the cam portion 42c of the door-side cam member 42 (slope of each inclined surface).

As shown in FIGS. 12(a), 12(b) and 13(a) to 13(f), the door-side cam member 42 is provided below the press-fit portion 42a and the press-fit portion 42a which are accommodated in the door-side housing portion 41e. A flange portion 42b and a cam portion 42c protruding downward from the flange portion 42b are provided. The press-fitting portion 42a has a cylindrical shape with a bottomed insertion hole 42d for inserting the shaft member 5, and has four vertically long ribs 42e on its outer circumference.

The cam portion 42c of the door-side cam member 42 of this embodiment has two locking ridges (first locking ridge 47a and second locking ridge 47b) and is formed between the two locking ridges 47a and 47b. It has two flattened surfaces (first flattened surface 48a and second flattened surface 48b). Both slopes forming the locking peaks 47a and 47b are set at an angle (specifically, about 60 degrees) to come into surface contact with the valley side slopes 33a, 34a, 35a and 36a. The height of both locking ridges 47a and 47b is lower than the depth of the first and second troughs of the base-side cam member 32, and both locking ridges 47a and 47b are located at the first and second valleys of the base-side cam member 32. The tips 47c of both locking ridges 47a and 47b are designed not to touch the first bottom portion B1 and the second bottom portion B2 of the base-side cam member 32 when they are accommodated in the first valley portion or the second valley portion. When one of the locking ridges 47a and 47b (for example, the first locking ridge 47a) is accommodated in the first trough portion of the base-side cam member 32, the other (for example, the second locking ridge 47b) is positioned on the base side. It is provided at a position to be accommodated in the second valley portion of the cam member 32 . It should be noted that the angle of both slopes forming the locking peaks 47a and 47b is an example, and may be set to an appropriate angle according to the shape of the cam portion 32d of the base-side cam member 32 (slope of each slope). can.

(Operation of Gravity Hinge of Embodiment 2)
The operation of the gravity hinge 1 of this embodiment will be described with reference to FIGS. 15(a)(b) and 16(a)(b). FIG. 15(a) shows the state in which the door X is closed, FIG. 15(b) shows the state in which the door X is opened 20 degrees, and FIG. 16(a) shows the state in which the door X is opened 70 degrees. However, FIG. 16(b) shows a state in which the door X is opened 90 degrees.

When the door X is closed, the slope forming the first locking ridge 47a of the door-side cam member 42 is in contact with the projecting ridge portion 33d of the base-side cam member 32 (FIG. 15(a)). When the door X is opened to 20 degrees from this state, the first locking peak 47a of the door-side cam member 42 rides over the projecting peak portion 33d of the base-side cam member 32 (FIG. 15(b)). When the door X is further opened to 70 degrees, the tip 47c of the first locking ridge 47a of the door-side cam member 42 reaches the first top portion T1 of the base-side cam member 32 (Fig. 16(a)). When the door X is opened up to 90 degrees from this state, the first locking peak 47a of the door-side cam member 42 climbs over the first top portion T1 of the base-side cam member 32, and the door-side cam member 42 moves toward the second inclined surface 34. 16(b)).

The reason why the door-side cam member 42 does not descend along the first inclined surface 33 (trough-side inclined portion 33a) of the base-side cam member 32 when the door X is closed (FIG. 15(a)) is This is because the door X collides with the door stopper Z of the door frame Y and does not rotate any more. The reason why the door-side cam member 42 does not move down along the fourth inclined surface 36 (mountain-side inclined portion 36c) of the base-side cam member 32 when the door X is opened 90 degrees (Fig. 16(b)) is that the door This is because X collides with a doorstop (not shown) and does not rotate any further.

The door X, which is held by the gravity hinge 1 operating as described above, cannot be opened by a light force up to 20 degrees. If not, it cannot be opened any further. Therefore, by setting the angle of the steep portion (valley-side inclined portion 33a) to an angle that cannot be exceeded by the pulling force generated by the use of the ventilation fan, the door X is prevented from being opened carelessly when the ventilation fan is used. be able to. As in the first embodiment, in this embodiment also, each inclined surface is provided with a gentle slope portion, so compared to the case where the entire inclined surface is steep, the ease of opening the door is less likely to be hindered. Furthermore, if the entire slope is steep, the door may move excessively up and down, but in this embodiment, each slope is provided with a gentle slope, so there is no such concern.

(Embodiment 3)
A third embodiment of the gravity hinge 1 of the present invention will be described with reference to FIGS. 17(a)(b) to 23(a)(b). The basic configuration of the gravity hinge of this embodiment is the same as that of the first embodiment. What is different is the structure of the cam portion 32d of the base-side cam member 32 and the cam portion 42c of the door-side cam member 42 . The following description will focus on portions that differ from the first embodiment, and descriptions of common portions will be omitted as appropriate.

As shown in FIGS. 17(a)(b) and 18(a) to (f), the upper surface of the cam portion 32d of this embodiment has four inclined surfaces (first inclined surface 33, second inclined surface 34, a third inclined surface 35 and a fourth inclined surface 36) and two flat portions (the flat portions are hereinafter referred to as “first flat portion 37a” and “second flat portion 37b”). In this embodiment, the first sloped surface 33 and the second sloped surface 34 form the first peak, and the third sloped surface 35 and the fourth sloped surface 36 form the second peak. Between the first inclined surface 33 and the second inclined surface 34 is the first peak T1 of the first peak, and between the third inclined surface 35 and the fourth inclined surface 36 is the second peak T2 of the second peak. A first flat portion 37a (first bottom portion B1) is formed between the fourth inclined surface 36 and the first inclined surface 33, and a second flat portion 37a (first bottom portion B1) is formed between the second inclined surface 34 and the third inclined surface 35. A portion 37b (second bottom portion B2) is formed.

Each of the inclined surfaces 33 to 36 includes valley-side inclined portions 33a, 34a, 35a, 36a, connecting portions 33f, 34f, 35f, 36f, and mountain-side inclined portions 33c, 34c, 35c, 36c. In this embodiment, the slopes of the valley-side slopes 33a, 34a, 35a, and 36a are steeper than those of the peak-side slopes 33c, 34c, 35c, and 36c. Specifically, the slopes of the valley-side slopes 33a, 34a, 35a, and 36a are about 60 degrees, and the slopes of the mountain-side slopes 33c, 34c, 35c, and 36c are about 22 degrees. In this embodiment, the valley side slopes 33a, 34a, 35a, 36a hit the steep slopes. In this embodiment, the connecting portions 33f, 34f, 35f, and 36f are provided at positions near the mountain-side inclined portions 33c, 34c, 35c, and 36c of the respective inclined surfaces 33 to 36, but the connecting portions 33f, 34f, and 35f , 36f can also be provided at positions different from those shown.

The angle of each inclined portion is an example, and other angles may be used. For example, the slopes of the gentle slopes (in this embodiment, the mountain side slopes 33c, 34c, 35c, 36c) can be any angle between 15 degrees and 45 degrees, and the steep slopes (in this embodiment, the valley side The inclined portions 33a, 34a, 35a, 36a) can be set at an arbitrary angle of 45 degrees to 75 degrees on the premise that they are steeper than the gentle slope portion. It is necessary to set the slope of each inclined part in consideration of the width of the door rise. For example, if the upper limit of the width of the rise is set to 5 mm or less, the slope of each slope is set so that the door does not move up and down by more than 5 mm, and the upper limit of the width of the rise is set to 8 mm or less. , set the slope of each ramp so that the door does not move up or down more than 8 mm. In either case, consideration is given to a shape that conforms to the shape of the cam portion 42c of the door-side cam member 42 (slope of each inclined surface).

The first flat portion 37a corresponds to the first bottom portion B1 in Embodiment 1, and is formed between the valley-side inclined portion 33a of the first inclined surface 33 and the valley-side inclined portion 36a of the fourth inclined surface 36. It is a planar portion. The second flat portion 37b is a portion corresponding to the second bottom portion B2 in Embodiment 1, and is formed between the valley-side inclined portion 34a of the second inclined surface 34 and the valley-side inclined portion 35a of the third inclined surface 35. It is a planar portion.

As shown in FIGS. 19(a)(b) and 20(a) to (f), the cam portion 42c of the door-side cam member 42 of this embodiment has four inclined surfaces (a first inclined surface 43, a Two inclined surfaces 44, a third inclined surface 45 and a fourth inclined surface 46) and two flat portions (each flat portion is hereinafter referred to as “first flat portion 49a” and “second flat portion 49b”) are provided. there is In this embodiment, the first sloped surface 43 and the second sloped surface 44 form the first peak portion, and the third sloped surface 45 and the fourth sloped surface 46 form the second peak portion. Between the first inclined surface 43 and the second inclined surface 44 is the first peak T1 of the first peak, and between the third inclined surface 45 and the fourth inclined surface 46 is the second peak T2 of the second peak. However, between the fourth inclined surface 46 and the first inclined surface 43 is a first flat portion 49a (first bottom portion B1), and between the second inclined surface 44 and the third inclined surface 45 is a second flat portion 49b. (Second bottom B2) is formed.

Each of the inclined surfaces 43 to 46 includes valley side inclined portions 43a, 44a, 45a and 46a, connecting portions 43d, 44d, 45d and 46d, and mountain side inclined portions 43c, 44c, 45c and 46c. The valley-side slopes 43a, 44a, 45a, and 46a are steeper than the mountain-side slopes 43c, 44c, 45c, and 46c. The slope is steeper than 45d and 46d. Specifically, the slopes of the valley-side slopes 43a, 44a, 45a, and 46a are about 60 degrees, and the slopes of the mountain-side slopes 43c, 44c, 45c, and 46c are about 22 degrees. In this embodiment, the valley side slopes 43a, 44a, 45a, 46a hit the steep slopes. In this embodiment, the connecting portions 43d, 44d, 45d, and 46d are provided at positions near the valley side inclined portions 43a, 44a, 45a, and 46a of the respective inclined surfaces 43 to 46, but the connecting portions 43d, 44d, 45d and 46d can also be provided at positions different from those shown.

The angle of each inclined portion is an example, and other angles may be used. For example, the slopes of the gentle slopes (in this embodiment, the mountain side slopes 43c, 44c, 45c, 46c) can be any angle between 15 degrees and 45 degrees, and the steep slopes (in this embodiment, the valley side The inclined portions 43a, 44a, 45a, 46a) can be set at an arbitrary angle of 45 degrees to 75 degrees on the premise that they are steeper than the gentle slope portion. It is necessary to set the slope of each inclined part in consideration of the width of the door rise. For example, if the upper limit of the width of the rise is set to 5 mm or less, the slope of each slope is set so that the door does not move up and down by more than 5 mm, and the upper limit of the width of the rise is set to 8 mm or less. , set the slope of each ramp so that the door does not move up or down more than 8 mm. In either case, consideration is given to a shape that conforms to the shape of the cam portion 32d of the base-side cam member 32 (slope of each inclined surface).

The first flat portion 49a corresponds to the first bottom portion B1 in Embodiment 1, and is formed between the valley-side inclined portion 43a of the first inclined surface 43 and the valley-side inclined portion 46a of the fourth inclined surface 46. It is a planar portion. The second flat portion 49b corresponds to the second bottom portion B2 in Embodiment 1, and is formed between the valley-side inclined portion 44a of the second inclined surface 44 and the valley-side inclined portion 45a of the third inclined surface 45. It is a planar portion.

(Operation of Gravity Hinge of Embodiment 3)
The operation of the gravity hinge of this embodiment will be described with reference to FIGS. 22(a)(b) and 22(a)(b). 22(a) shows the state in which the door X is closed, FIG. 23(b) shows the state in which the door X is opened 10 degrees, and FIG. 23(a) shows the state in which the door X is opened 70 degrees. However, FIG. 23(b) shows the state in which the door X is opened 90 degrees.

When the door X is closed, the valley-side inclined portion 44a of the second inclined surface 44 of the door-side cam member 42 abuts against the valley-side inclined portion 33a of the first inclined surface 33 of the base-side cam member 32 (FIG. 22 ( a)). When the door X is opened to 10 degrees from this state, the valley-side inclined portion 44a of the second inclined surface 44 climbs over the valley-side inclined portion 33a of the first inclined surface 33 (FIG. 22(b)). When the door X is further opened to 70 degrees, the first top T1 of the door-side cam member 42 reaches the first top T1 of the base-side cam member 32 (Fig. 23(a)). When the door X is opened to 90 degrees from this state, the first top portion T1 of the door-side cam member 42 climbs over the first top portion T1 of the base-side cam member 32, and the second inclined surface 34 (mountain side) of the base-side cam member 32 It descends along the inclined portion 34c) (FIG. 23(b)).

The reason why the door-side cam member 42 does not descend along the first inclined surface 33 (trough-side inclined portion 33a) of the base-side cam member 32 when the door X is closed (FIG. 22(a)) is This is because the door X collides with the door stopper Z of the door frame Y and does not rotate any more. The reason why the door-side cam member 42 does not move down along the fourth inclined surface 36 (mountain-side inclined portion 36c) of the base-side cam member 32 when the door X is opened 90 degrees (FIG. 23(b)) is that the door This is because X collides with the door stop Z (not shown) and does not rotate any further.

A large reaction force is applied to the door X held by the gravity hinge 1 that operates as described above until it climbs over the steep slope portion (valley-side slope portion 33a) from the closed state, making it difficult to open the door X. , the door X becomes easier to open as the reaction force becomes smaller when entering the mountain-side inclined portion 33c over the steep slope portion. Therefore, by setting the angle of the steep slope portion to an angle that cannot be exceeded by the pulling force generated by using the ventilating fan, it is possible to prevent the door X from being carelessly opened when using the ventilating fan. As in Embodiments 1 and 2, in this embodiment as well, each inclined surface is provided with a gentle slope portion, so compared to the case where the entire inclined surface is steep, the ease of opening the door is less likely to be hindered. Furthermore, if the entire slope is steep, the door may move excessively up and down, but in this embodiment, each slope is provided with a gentle slope, so there is no such concern.

(Other embodiments)
In Embodiments 1 to 3, the configurations of the base-side cam member 32 and the door-side cam member 42 can be reversed. Specifically, the configuration of the base-side cam member 32 can be employed as the configuration of the door-side cam member 42 , and the configuration of the door-side cam member 42 can be employed as the configuration of the base-side cam member 32 .

The gravity hinge 1 of the present invention is not limited to the configurations described in Embodiments 1 to 3, and includes a steep slope portion in either one of the base-side cam member 32 and the door-side cam member 42. A structure other than those described in Embodiments 1 to 3 is also possible as long as the steep slope portion restricts the rotation of the door X in the retracting direction.

INDUSTRIAL APPLICABILITY The gravity hinge 1 of the present invention can be suitably used as a hinge member for a door installed in a private room that requires ventilation by a ventilation means, in addition to a bathroom.

1 Gravity Hinge 3 Base Side Member 31 Base Side Substrate 31a Fixed Part 31b Cylindrical Part 31c Screw Hole 31d Screw 31e Base Side Accommodating Part 31f Upper Surface Opening 32 Base Side Cam Member 32a Press Fit Part 32b Large Diameter Part 32c Flange 32d Cam Part 32e Insertion hole 32f Rib 33 First inclined surface 33a Valley side inclined part 33b Middle inclined part 33c Mountain side inclined part 33d Protruding mountain part 33e Middle valley part 33f Joint part 34 Second inclined surface 34a Valley side inclined part 34b Middle inclined part 34c Mountain side inclined portion 34d Mountain side inclined portion 34e Middle valley portion 34f Joint portion 35 Third inclined surface 35a Valley side inclined portion 35b Middle inclined portion 35c Mountain side inclined portion 35d Mountain side inclined portion 35e Middle valley portion 35f Joint portion 36 Fourth inclined surface 36a Valley Side inclined portion 36b Intermediate inclined portion 36c Mountain side inclined portion 36d Projected mountain portion 36e Middle valley portion 36f Joint portion 37a First flat portion 37b Second flat portion 4 Door side member 41 Door side substrate 41a Fixed portion 41b Cylindrical portion 41c Screw receiver Portion 41e Door-side accommodation portion 41f Bottom opening 42 Door-side cam member 42a Press-fit portion 42b Collar portion 42c Cam portion 42d Insertion hole 42e Rib 43 First inclined surface 43a Valley-side inclined portion 43b Intermediate inclined portion 43c Mountain-side inclined portion 43d Joint portion 44 second inclined surface 44a valley side inclined portion 44b middle inclined portion 44c mountain side inclined portion 44d connecting portion 45 third inclined surface 45a valley side inclined portion 45b middle inclined portion 45c mountain side inclined portion 45d connecting portion 46 fourth inclined surface 46a valley side Inclined portion 46b Intermediate inclined portion 46c Mountain-side inclined portion 46d Joint portion 47a First locking ridge 47b Second locking ridge 47c Tip 48a First flat surface 48b Second flat surface 49a First flat portion 49b Second flat portion 5 Shaft member 6 Door holding member 61 Plate-like packing 61a Through hole 62 Cylindrical packing 63 Clamping piece 63a Through hole 64 Fixing screw 65 Washer 66 Cover A Base side member B Door side member C Shaft member D Door holding member E Base side cam member E1- E4 Inclined surface (of base-side cam member) F Door-side cam member F1 to F4 Inclined surface (of door-side cam member) B1 First bottom B2 Second bottom T1 First top T2 Second top X Door Y Door frame Z Door hit

Claims (5)

A first member fixed to either one of the edge of the opening and a door that opens and closes the opening, a second member fixed to the other of them, and inserted into both the first member and the second member to connect them In a gravity hinge provided with a shaft member that is vertically movable and horizontally rotatable,
Four inclined surfaces are provided on a surface of one or both of the cam members of the first member and the second member that faces the other cam member, and each of the four inclined surfaces is provided with an inclined surface. A steeper section is provided that is steeper than the other sections that make up the
A portion of the other cam member abuts against the steep slope portion, thereby restricting rotation of the door in the retracting direction.
A gravity hinge characterized by: A first member fixed to either one of the edge of the opening and a door that opens and closes the opening, a second member fixed to the other of them, and inserted into both the first member and the second member to connect them In a gravity hinge provided with a shaft member that is vertically movable and horizontally rotatable,
the first member comprises a first base and a first cam member mounted on the first base;
the second member comprises a second base and a second cam member mounted on the second base;
Four inclined surfaces are provided on the surfaces facing each other of the first cam member and the second cam member,
each inclined surface of the first cam member includes a first valley-side inclined portion, a first peak-side inclined portion, and a middle inclined portion steeper than the first valley-side inclined portion and the first peak-side inclined portion;
Each inclined surface of the second cam member includes a second valley-side inclined portion, a second peak-side inclined portion, and a middle inclined portion steeper than the second valley-side inclined portion and the second peak-side inclined portion. there is
A gravity hinge characterized by: A first member fixed to either one of the edge of the opening and a door that opens and closes the opening, a second member fixed to the other of them, and inserted into both the first member and the second member to connect them In a gravity hinge provided with a shaft member that is vertically movable and horizontally rotatable,
the first member comprises a first base and a first cam member mounted on the first base;
the second member comprises a second base and a second cam member mounted on the second base;
Four inclined surfaces are provided on a surface of the first cam member facing the second cam member,
Two locking ridges and two flat surfaces are provided on a surface of the second cam member facing the first cam member,
each inclined surface of the first cam member includes a valley-side inclined portion, a peak portion, and a peak-side inclined portion;
the slope of the valley-side inclined portion of the first cam member is steeper than the peak-side inclined portion;
A gravity hinge characterized by: A first member fixed to either one of the edge of the opening and a door that opens and closes the opening, a second member fixed to the other of them, and inserted into both the first member and the second member to connect them In a gravity hinge provided with a shaft member that is vertically movable and horizontally rotatable,
the first member comprises a first base and a first cam member mounted on the first base;
the second member comprises a second base and a second cam member mounted on the second base;
Four inclined surfaces are provided on the surfaces facing each other of the first cam member and the second cam member,
each inclined surface of the first cam member includes a first valley-side inclined portion, a first connecting portion, and a first peak-side inclined portion;
the slope of the first valley-side inclined portion of the first cam member is steeper than the first peak-side inclined portion;
each inclined surface of the second cam member includes a second valley-side inclined portion, a second connecting portion, and a second peak-side inclined portion;
the slope of the second valley-side inclined portion of the second cam member is steeper than the second peak-side inclined portion;
A gravity hinge characterized by: In the gravity hinge according to any one of claims 1 to 4,
Gravity hinges are for glass doors,
A gravity hinge characterized by:

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