JPH076465Y2 - Hinge for folding door - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a hinge used for a folding door of furniture and fittings, and more particularly to a hinge capable of holding the folding door in a locked state.

[Conventional technology]

In this type of hinge, for example, the present applicant
As disclosed in Japanese Patent No. 522, there is known a structure in which the posture is held in a locked state at each of the open position and the closed position of the folding door.

This is to provide a pair of mounting plates attached to a folding door with an engaging member having a wedge-shaped cam surface and an engaged member engaged with the cam surface to form a locking mechanism, and to open and close the folding door. The locked state is obtained by engaging the engaging member with the engaged member at the final position. By obtaining the locked state, rattling at each position of the folding door is avoided.

[Problems to be solved by the device]

By the way, in a partition structure in which a plurality of folding doors are arranged in series, for example, when opening a frontage, each folding door is folded and manually pushed to one side or both sides of the frontage to be gathered together.

In this case, since the folding door having the hinge having the structure as described above has only the posture maintaining function at the open position and the closed position,
When moving, the folding door is completely folded. Therefore, the rail support of each door approaches, the center of gravity shifts to the maximum from the rail, and knocking or rattling occurs when moving, smooth movement cannot be obtained, and unnecessary labor is also required. Met. This is not only a problem of movement operability but also a factor that causes an early deterioration of the rail and the runner member due to the action of an unbalanced load in the long term.

On the other hand, as disclosed in Japanese Utility Model Laid-Open No. 63-111574, one hinge element is provided with a rotation holding recess around the pivot shaft, and the other hinge element is spring-loaded toward the pivot shaft side. A biased ball is arranged so that when the folding door is opened in a V-shape, it engages with the rotation holding recess and moves along the rail while holding the folding door in the V-shape. .

However, in this hinge, at the position where the ball is engaged with the rotation holding recess, the contact position between the ball and this holding recess and the center of the pivot shaft are located substantially in series on the axis of the spring.
When an external force is applied to the folding door, the restoring moment around the pivot axis that opposes this force does not work, causing vibration due to external force such as vibration, and especially the movement of the folding door in the V-shaped posture is not performed smoothly. There was a problem.

Therefore, an object of the present invention is to provide a hinge that can smoothly perform a moving operation in a state where a folding door is opened in a V shape without rattling, and can suppress early deterioration of a rail and a runner member.

[Means for Solving the Problems]

A feature of the hinge for folding door according to the present invention to achieve the above-mentioned object is that a mounting member is provided with a slide member and a cam member with which the slide member abuts, and the slide member has an end surface and a side surface on the front end side. A closing member having a contact portion formed in a wedge shape by means of a spring and biased toward the cam member by a spring, and the contact portion engages with the cam surface of the cam member at the closing position of the folding door. At the V-shaped open position and the temporary engagement engaging surface part that is formed with an inclination degree that engages with the mating surface at the V-shaped open position to prevent rotation in the folding direction and moves while maintaining the V-shaped posture of the folding door. There is provided a gently sloped surface portion that abuts the end surface of the slide member to generate a rotational force in the folding direction.

[Action]

According to this invention, at the closing position of the folding door, the abutment portion of the slide member is engaged with the closing engagement surface portion of the cam member, and the locked state at the closing position is obtained. When the folding door is folded from the closed position, the slide member is retracted against the biasing force of the spring by the folding force, and the engagement between the closing engagement surface portion and the slide member is released. As the folding progresses, the slide member is restored and its abutment portion is engaged with the temporary fixing engagement surface portion of the cam member. At the same time, the end surface of the slide member abuts on the gentle slope of the cam member to generate a rotational force in the folding direction,
The temporary fixing engagement surface portion and the contact portion are urged in the engagement direction, so that the folding door has a V-shaped posture in a stable engaged state, and is moved in a state in which the V-shaped posture is maintained. The V-shaped posture maintains the space between the rail support portions of the folding door, reduces the shift of the center of gravity, and prevents knocking.

If a larger folding force is applied than when one door is in contact with a fixed member such as a door frame than when it is moved, the slide member is retracted and disengaged from the temporary fixing engagement surface portion. The folding progresses further and the open position of the folding door is obtained.

Further, when the folding door is unfolded from the open position, the slide member retracts and restores as the unfolding progresses, and is engaged with the temporary engaging surface portion. As the deployment further progresses, the engagement between the temporary engagement engagement surface portion and the slide member is released, and the slide member retracts,
It is engaged with the closing engagement surface portion through the restoring operation. As a result, the closed position of the folding door can be obtained and the locked state at the closed position can be obtained.

〔Example〕

 1 to 5 show an embodiment of the present invention.

Between the upper rail 2 and the lower rail 4, folding doors 6, 6 are provided so that their adjacent ends are connected to each other by a hinge 8 so as to be foldable. The upper and lower ends of the folding doors 6, 6 are supported by an upper runner 10 and a lower runner 12, respectively.

The hinge 8 is provided with a pair of mounting plates 14 and 14, and these mounting plates 14 and 14 are rotatably connected by a sleeve member 18 that holds the shaft pin 16. In the figure, reference numerals 20 and 22 denote mounting holes, and 24 and 24 denote stopper surfaces of the mounting plates 14 and 14.

A slide member 26 is provided on one of the mounting plates 14, and a cam member 28 with which the slide member 26 abuts is inserted into the shaft pin 16 and fixed to the other mounting plate 14. The slide member 26 has a block shape as a whole, and a top surface 30a is provided on the tip side thereof.
A wedge-shaped contact portion 30 having an end surface 30b and a side surface 30c is formed. Further, the slide member 26 is formed with a spring accommodating hole 32 opening to the rear end side, and a spring 36 is attached to the spring accommodating hole 32 with its rear end abutting against the seat plate 34. Therefore,
The slide member 26 is constantly urged toward the cam member 28,
The contact portion 30 is in contact with the cam surface 28a of the cam member 26 in a pressed state. Further, the mounting plate 14 is formed with a guide member 38 for guiding the movement of the slide member 26 in the urging direction, and the guide member 38 regulates the movement or rattling of the slide member 26 in a direction other than the urging direction. ing.

On the cam surface 28a of the cam member 28, a closing engagement surface portion 40 for obtaining the locked state of the folding doors 6, 6 at a closed position, a temporary engagement engagement surface portion 42 for maintaining a V-shaped posture, and An opening engagement surface portion 44 for obtaining a locked state at the opening position is formed,
Between the closing engagement surface portion 40 and the temporary engagement engagement surface portion 42, there are formed gentle slope portions 46, 48 that promote folding and act as a gentle resistance surface when the folding doors 6, 6 are deployed. There is.

When the slide member 26 engages with the temporary engaging surface portion 42 of the cam member 28, the V-shaped posture of the opening degree β is maintained as shown in FIG. 3 (a). In this case, the end surface 30b of the slide member abuts the gentle slope portion 48 to generate a rotational force in the folding direction, and the temporary fixing engagement surface portion 42 and the contact portion 30 are biased to the engaged state and swing. Is prevented from occurring.

The end surface 30b and the gentle slope portion 48 can be formed into a flat surface as shown in FIG. 3 and abutted against each other in a surface contact state. The temporary fixing engagement surface portion 42 is formed with an inclination of an angle α between the alternate long and short dash lines G ₁ and G ₂ . When the contact point with the contact portion 30 is S, the extension line between the centers O and S of the shaft pin 16 which is the center of rotation when the folding doors 6 and 6 are folded is G ₁ , and S and the temporarily engaging engagement surface portion.
The extension of the straight part of 42 is G ₂ . As a result of the experiment, Orido 6,
It was confirmed that β = 20 ° to 90 ° in order to prevent knocking or rattling during movement of 6. on the other hand,
It has been found that α = 5 ° to 30 ° is desirable in order to be able to move while maintaining the V-shaped posture and to complete folding with a force as small as possible at the movement end position. As shown in FIG. 3 (b), when the distance between O and S is L, the engagement on the temporary engagement surface 42 cannot be disengaged unless a moment of PL (kgmm) acts. The rotational force P is combined with the reaction force N of the slide member 26 and the reaction force R of the rotating shaft (shaft pin 16), and this rotational force P acts as a folding prevention force, as is clear from the action direction. As shown in FIG. 4, when a folding pressing operation is applied to one of the folding doors 6, the folding proceeds (solid line), and when the slide member 26 engages with the temporary engagement engaging surface portion 42 of the cam member 28, two points are formed. As shown by the chain line, a V-shaped posture is formed, and this V-shaped posture is held by the above-mentioned folding prevention force P and moved. By the V-shaped posture, the rail supporting portions of the folding doors 6 and 6 are kept at a constant interval and the shift of the center of gravity from the rail is reduced, so that smooth movement without knocking or rattling is performed.

When the folding door 6 on the side opposite to the pressing side comes into contact with the fixing member 50 such as the door frame, the sliding member 26 is moved backward against the biasing force of the spring 36 by applying a pressing force larger than the folding blocking force P. Then, the engagement between the temporary engagement engaging surface portion 42 and the slide member 26 is released, and the folding of the folding doors 6, 6 is completed. The smaller the inclination angle α of the temporary engagement engaging surface portion 42, the larger the pressing force required to complete the folding.

Next, the engagement relationship between the slide member 26 and the cam member 28 from the closed position to the open position of the folding doors 6, 6 will be described step by step with reference to FIG.

In the open position, the abutment portion 30 of the slide member 26 abuts the closing engagement surface portion 40 of the cam member 28 at the top surface 30a. In this case, the rotational force P is extremely smaller than the size of the temporary engagement engagement surface portion 42, but acts as a folding prevention force capable of preventing rattling at the closed position. In the closed position, the mounting plates 14,14
Since the stopper faces 24, 24 come into contact with each other so as to be flush with each other, rattling is prevented on the front and back sides of the hinge 8.

When folding is started from the closed position, the same figure (b),
As shown in (c) and (d), the slide member 26 retracts,
The contact portion 30 moves forward and slides on the gently sloped surfaces 46, 48 of the cam member 28 to reach the temporary fixing engagement surface portion 42. In this case, the rotational force P acts as a weak force that promotes folding in (b) and (d), and acts as a weak force that prevents folding in (c).

When the folding progresses through the temporary fixing position described above, the open position shown in FIG. 7E is finally obtained. In the open position, the slide member 26 is engaged with the open engagement surface portion 44 of the cam member 28. In this case, a frictional force F that prevents the folding doors 6 and 6 from expanding acts to prevent rattling at the open position. The opening engagement surface portion 44 is formed into a gentle curved surface so that the operation at the time of deployment can be easily performed.

When the unfolding operation is performed to obtain the closed position, the slide member 26 and the opening engaging surface portion 44 are disengaged, and the slide member is released.
The valve 26 advances and retracts, and finally engages with the closing engagement surface portion 40.

[Effect of device]

According to the present invention, at the V-shaped open position of the folding door, the abutment portion of the slide member engages with the temporary engagement engaging surface portion formed on the cam surface of the cam member to maintain the V-shaped posture and loosen it. When the end surface of the slide member abuts the inclined surface portion with the biasing force of the spring, a rotational force in the folding direction is generated and the temporary fixing engagement surface portion and the contact portion are biased into the engaged state. It is possible to prevent the folding door from swinging during movement in a character posture, and to smoothly move the folding door with only one hand pressing operation.

Further, since the swinging of the folding door during movement is prevented, it is possible to prevent early deterioration of folding door constituent members such as rails and runners during long-term use.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of a folding door hinge according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a YY line in FIG. 2 in a V-shaped posture. FIG. 4 is a cross-sectional view and a view showing the action of the folding-inhibiting force, FIG. 4 is a view showing a moving state in a V-shaped posture, and FIG. 5 is a YY line in FIG. 2 in a stepwise engagement state during folding. FIG. 6 …… folding door, 8 …… folding door hinge 14 …… mounting plate, 16 …… axis pin 18 …… sleeve member 26 …… slide member 28 …… cam member, 28a …… cam surface 30 …… contact part, 36 …… Spring 40 …… Engagement surface part for closing 42 …… Engagement surface part for temporary fixing

Claims (2)

[Scope of utility model registration request] 1. A pair of mounting plates to be mounted on a folding door, wherein the pair of mounting plates are substantially flush with each other at a closed position of the folding door, and are rotated by a sleeve member that holds the shaft pin so as to be folded at the open position. In a hinge that is movably connected, each of the mounting plates is provided with a slide member and a cam member with which the slide member abuts, and the slide member is formed in a wedge shape by an end surface and a side surface on a tip end side thereof. It has a contact portion and is biased toward the cam member side by a spring, and the contact surface engages with the cam surface of the cam member at the closing position of the folding door and the V-shaped opening position. And the end surface of the slide member at the V-shaped open position is engaged with the temporary engagement engaging surface portion that is formed to have an inclination that allows the folding door to rotate in the folding direction and prevent the folding door from moving while maintaining the V-shaped posture. And a gentle slope that produces a rotational force in the folding direction. Hinges for folding doors that are characterized by 2. The folding door according to claim 1, wherein the end surface of the slide member and the gentle slope portion of the cam surface are formed into a flat surface and abut against each other in a surface contact state. hinge.