KR20230163293A - Opening and closing article or bifolding doors - Google Patents

Abstract

[Project] To provide an opening and closing device that has a simple structure and is easy to assemble and can automatically open and close a folding door, and a folding door device using the same.
[Solution] In the opening and closing device of the present invention, a base plate, a pair of center cams fixed to the base plate so as to correspond to a first door body and a second door body that can be folded in two and are free to open and close, respectively, and A pair of slide cams arranged to be able to slide with respect to the pair of center cams, an elastic body that provides a biasing force to press the slide cam with respect to the center cam, and a pair of center cams that are freely rotatable with respect to each of the pair of center cams. It is mounted and has a pair of case plates accommodating the pair of slide cams and the elastic body, and when the slide cam slides and rotates while being pressed against the center cam by the biasing force, the first door The sieve and the second door body transition between an open state and a closed state.

Description

Opening and closing device and bifolding doors {Opening and closing article or bifolding doors}

The present invention particularly relates to an opening and closing device and a folding door device that automatically open and close two folding doors.

Conventionally, there is a folding door device that opens and closes two doors by folding them in two (for example, see Patent Document 1). This folding door device has hinges that allow the two doors to close automatically. A helical spring is stored in the hinge of this folding door device, and the door can be automatically closed by the restoring force of the helical spring.

This folding door device has excellent aesthetics and workability, as the hinges do not protrude from the panel body and the hinges can be easily mounted on the panel body.

In addition, the first door and the second door are configured to be engaged and held when the first door and the second door are in a 180 degree and parallel state, and the folding door is positioned in the closed position and the fully open position. In order to secure it securely to the latch disc, engaging portions are provided at the closed and deployed positions respectively facing the latch protrusion provided on the latch disk, and the latch protrusion and the engaging portion engage to form a folding door. A rotary folding door that holds has been proposed (for example, see Patent Document 2).

Patent Document 1: Japanese Patent Laid-Open No. 2007-332633 Patent Document 2: Japanese Patent Publication No. 2015-212493

In the folding door device described in Patent Document 1, in order to completely close the door, it is necessary to use a strong spiral spring. When used for a long time, the durability of the spiral spring decreases, and there is a risk of damage when the opening and closing operation is repeated.

Additionally, in the folding door device described in Patent Document 1, a gap occurs between the rolling element and the movable member, so when the first door and the second door are operated, the rolling element There was a risk of fingers getting caught in the gap between the moving parts.

In addition, in the rotary folding door described in Patent Document 2, the purpose is to hold the first door and the second door in a 180-degree and parallel state, and the first door and the second door cannot be opened and closed automatically. There was a problem.

The present invention was made in view of the above problems, and its purpose is to provide an opening and closing device capable of automatically opening and closing a folding door with a simple structure and easy assembly, and a folding door device using the same.

In the opening and closing device of the present invention, a base plate, a pair of center cams fixed to the base plate so as to correspond to a first door body and a second door body that can be folded in two and are free to open and close, respectively, and the pair of center cams A pair of slide cams arranged to be able to slide with respect to the center cam, an elastic body that provides a biasing force to press the slide cam with respect to the center cam, and the pair of center cams. is rotatably mounted on each of the slide cams and a pair of case plates accommodating the elastic body, and the slide cam is pressed against the center cam by the biasing force. When sliding and rotating, the first door body and the second door body transition between an open state and a closed state.

In the present invention, the slide cam has a fixed position maintaining the open state or the closed state when pressed against the center cam by the biasing force, and the first door body or the second door body. It is preferable to rotate between non-stationary positions to return to the above-mentioned position by an external force.

In the present invention, it is preferable that in the normal position, the slide cam is pressed against the center cam at two points, and in the irregular position, the slide cam is pressed against the center cam at one point.

In the folding door device of the present invention, the elastic body is a compression coil spring that applies the biasing force.

In the present invention, a folding door device includes a door body composed of a first door body and a second door body that can be folded in two and are free to open and close, and a door body fixed to the base plate to correspond to the first door body and the second door body, respectively. A pair of center cams, a pair of slide cams arranged to be slidable with respect to the pair of center cams, an elastic body that provides a biasing force to press the slide cam with respect to the center cam, and the pair of slide cams An opening and closing device that is rotatably mounted on each of the center cams and includes a pair of case plates that accommodate the pair of slide cams and the elastic body, and a pair of case bases that are mounted on the case plates; It has a hinge fixed to the first door body and the second door body through a pair of case bases, and in the opening and closing device, the slide cam slides and rotates while being pressed against the center cam by the biasing force. When the first door body and the second door body transition between an open state and a closed state.

According to the aspect related to the present invention, an opening and closing device capable of automatically opening and closing a folding door with a simple structure and easy assembly, and a folding door device using the same can be realized.

[Figure 1] A perspective view showing the overall configuration of a folding door device according to an embodiment of the present invention.
[Figure 2] A perspective view, a top view, and a front view showing the folding door device according to an embodiment of the present invention in a half-open state.
[Figure 3] A perspective view, top view, and front view showing the folding door device according to an embodiment of the present invention in a fully open state.
[Figure 4] is a perspective view showing a state in which the guide rail has been removed from the folding door device according to the embodiment of the present invention.
[Figure 5] is an exploded perspective view of the opening and closing device and hinge of the folding door device according to the embodiment of the present invention.
[Figure 6] is a perspective view showing the configuration of a hinge of a folding door device according to an embodiment of the present invention.
[Figure 7] is a perspective view showing the overall configuration of the opening and closing device assembled in the folding door device according to the embodiment of the present invention.
[Figure 8] is a vertical cross-sectional view showing the configuration of an opening and closing device according to an embodiment of the present invention.
[Figure 9] is an exploded perspective view showing the configuration of an opening and closing device according to an embodiment of the present invention.
[FIG. 10] A perspective view showing a state in which a case plate, a center cam, and a slide cam are assembled to a base plate in the opening and closing device according to the embodiment of the present invention.
[FIG. 11] A diagram showing the configuration of a center cam of an opening and closing device according to an embodiment of the present invention.
[FIG. 12] A diagram showing the configuration of a slide cam of an opening and closing device according to an embodiment of the present invention.
[FIG. 13] A cross-sectional view used to explain the open and closed states of the opening and closing device according to the embodiment of the present invention.
[FIG. 14] is a cross-sectional view used to explain the open and closed states of the opening and closing device according to another embodiment of the present invention.

1. Overview of embodiments

First, an overview will be given of representative embodiments of the invention disclosed in this application. In addition, in the following description, as an example, reference signs in the drawings corresponding to components of the invention are indicated in parentheses.

[1] In the opening and closing device 10 according to a representative embodiment of the present invention, a base plate 101, a first door body 2a and a second door body 2b that are foldable in two and can be opened and closed freely; A pair of center cams 108 fixed to the base plate 101 so as to respectively correspond, a pair of slide cams 109 arranged to be slidable with respect to the pair of center cams 108, and the center An elastic body 112 that provides a biasing force to press the slide cam 109 with respect to the cam 108 and is rotatably mounted on each of the pair of center cams 108, and the pair of slides It is provided with a pair of case plates 102 that accommodate a cam 109 and the elastic body 112, and the slide cam 109 rotates while being pressed against the center cam 108 by the biasing force. When this happens, the first door body (2a) and the second door body (2b) transition between the open state and the closed state.

[2] In the opening and closing device 10, the slide cam 109 has a fixed position maintaining the open state or the closed state when pressed against the center cam 108 by the biasing force, and the first position. It is preferable that the door body (2a) or the second door body (2b) rotates between an irregular position and is about to return to the normal position by an external force.

[3] In the above-mentioned fixed position, the slide cam 109 is pressed against the center cam 108 at two points, and at the irregular position, the slide cam 109 is pressed against the center cam 108 at one point. It is desirable to press at.

[4] The elastic body 112 is a compression coil spring that applies the biasing force.

[5] In the present invention, the folding door device (1) includes a door body (2) composed of a first door body (2a) and a second door body (2b) that can be folded in two and is freely openable and closed, and the first door body. (2a) and a pair of center cams 108 fixed to the base plate 101 to correspond to the second door body 2b, respectively, and arranged to be slidable with respect to the pair of center cams 108. A pair of slide cams 109, an elastic body 112 that provides a biasing force to press the slide cam 109 with respect to the center cam 108, and a pair of center cams 108. A pair of case plates 102 that are rotatably mounted relative to each other and accommodate the pair of slide cams 109 and the elastic body 112, and a pair of case bases mounted on the case plates 102 ( 105), and a hinge 3 fixed to the first door body and the second door body through the pair of case bases 105, and the opening and closing device 10 When the slide cam 109 slides and rotates while being pressed against the center cam 108 by the biasing force, the first door body 2a and the second door body 2b are in an open state. Transitions between and closed states.

2. Specific examples of embodiments

Hereinafter, the configuration of the opening and closing device and the folding door device according to the first representative embodiment of the present invention will be described in detail with reference to FIGS. 1 to 13. In addition, the embodiment shown below is an example and can take various forms within the scope of the present invention.

In addition, for convenience of explanation, it is assumed that the opening and closing direction may be referred to as the left-right direction or the horizontal direction. That is, the direction of arrow a for opening the door body is set to the opening direction or left direction, and the direction of arrow b for closing the door body is set to the closing direction or right direction. Additionally, it is assumed that the direction of gravity (direction of arrow cd) perpendicular to the opening/closing direction (direction of arrow ab) of the door body is sometimes referred to as the vertical direction. That is, the upper side or upward direction of the door body is taken in the direction of arrow c, and the lower side or downward direction of the door body is taken in the direction arrow d.

Additionally, it is assumed that the depth direction (direction of arrow ef) perpendicular to the opening/closing direction (direction of arrow ab) of the door body is sometimes referred to as the front-back direction. That is, the direction of the arrow e pointing inward from the front of the paper is inward, and the direction of arrow f pointing inward from the inside of the paper is forward. However, the left-right direction, up-down direction, and front-back direction are used for convenience of explanation, and can be defined as different directions depending on the usage situation of the door body.

(2-1) First embodiment

＜Folding door device＞

1 to 5, the folding door device 1 according to the first embodiment of the present invention includes a door body 2 consisting of a first door body 2a and a second door body 2b. ), a hinge 3 mounted on both the upper left corner of the first door body 2a and the upper right corner of the second door body 2b, the hinge 3, and It is provided with an opening and closing device 10 (FIGS. 1 and 5) mounted integrally, and a guide rail 4 fixed to the upper frame of an opening frame of a house or the like. In addition, although not shown, hinges are similarly mounted on the lower left corner of the first door body 2a and the lower right corner of the second door body 2b.

The door body 2 is made of a first door body 2a and a second door body 2b, and the first door body 2a is formed to be larger than the second door body 2b. In addition, it is assumed that the large-sized first door body 2a is sometimes called the large door 2a, and the small-sized second door body 2b is sometimes called the small door 2b.

1 to 3, the door 2 can be opened and closed by folding or extending the first door 2a and the second door 2b through the hinge 3. Specifically, the user on the front side (direction of arrow f) pulls the front door of the first door body 2a forward, or the user on the inside (direction of arrow e) pulls the front door side of the first door body 2a forward. By pushing the door front side forward, the door body 2 can be placed in an open state (hereinafter also referred to as “open state”) through the hinge 3. Additionally, similarly, the user can put the door 2 in a closed state (hereinafter also referred to as a “closed state”) by performing the opposite operation while the door 2 is in an open state.

The guide rail 4 is formed to have the same length as the length of the door body 2 in the closed state (state where the first door body 2a and the second door body 2b are extended in a straight line). , It is fixed along the upper frame of the opening frame of a house, etc.

The guide rail 4 is formed in an inverted U-shaped cross section with an opening on the lower side (in the direction of arrow d), and a runner (not shown) engaged with the first door body 2a runs inside the guide rail 4. do. In addition, the engagement state and operation with the guide rail 4, runner, and first door body 2a are general, and detailed description is omitted here.

As shown in FIG. 4, the first door body 2a includes a first door body 21a made of wood or metal, and a first door body 21a integrally fixed on the upper side of the first door body 21a. It has a door receiving portion (22a). The first door accommodating portion 22a is made of wood or metal, and has a hollow interior so as to accommodate a part of the opening and closing device 10. In addition, the first door accommodating portion 22a can accommodate not only a part of the opening and closing device 10 but also the arm 3p of the hinge 3, and the arm 3p is not visible from the side.

Similarly, the second door body 2b includes a second body portion 21b made of wood or metal, and a second door accommodating portion 22b integrally fixed to the upper side of the second door body portion 21b. ) has. The second door accommodating portion 22b is also made of wood or metal, and has a hollow interior so as to accommodate a part of the opening and closing device 10. In addition, the second door accommodating portion 22b can accommodate not only a part of the opening and closing device 10 but also the arm 3q of the hinge 3, and the arm 3q is not visible from the side.

In addition, between the first door body (2a) and the second door body (2b), a blind rail 23 serves as a screen to prevent the gap that occurs when the door body (2) opens and closes through the hinge (3). ) is installed. The blind rail 23 has a first shade part 23a mounted on the first door body 2a, and a second shade part 23b mounted on the second door body 2b, and is connected to the first door body 2a. It is possible to bend between the first shade portion 23a and the second shade portion 23b in accordance with the opening and closing of the screen 2a and the second door body 2b.

4 and 5, the hinge 3 is mounted on the upper side of the opening and closing device 10 (in the direction of arrow c) and is attached to the first door receiving portion 22a of the first door body 2a. The arm 3p is accommodated, and the opening and closing device 10 is held with the arm 3q accommodated in the second door accommodating portion 22b of the second door body 2b.

As shown in FIG. 1, since the guide rail 4 is actually mounted on the upper side (in the direction of arrow c) of the first door accommodating part 22a and the second door accommodating part 22b, the arm of the hinge 3 (3p) and arm (3q) are not visible from the outside, so they have an excellent appearance design.

As shown in FIGS. 6(A) and 6(B), the hinge 3 includes a gear case 3a having an oval-shaped upper side (in the direction of arrow c) opened in plan view, and 2 stored in the gear case 3a. It has two gears (3ga, 3gb) and arms (3p, 3q) integrally mounted with the gears (3ga, 3gb), respectively.

The gear case 3a accommodates two gears 3ga and 3gb meshed with each other, and holds arms 3p and 3q integrally mounted with the two gears 3ga and 3gb in an exposed state. A cover 3c is mounted on the upper side (in the direction of arrow c) of the two gears 3ga and 3gb. The cover 3c prevents foreign substances such as dust from entering the area where the two gears 3ga and 3gb engage, and supports the gears 3ga and 3gb from above to prevent the gears themselves from being misaligned, that is, the gears (3ga, 3gb). It has the role of a lid, preventing 3ga, 3gb) from moving up and down.

The arms 3p and 3q have a predetermined length and four through holes for mounting on the opening and closing device 10. That is, the hinge 3 includes four through holes in the arms 3p and 3q and four through holes 107h in the arm portion 107 of the case base 105 (to be described later). It is fixed to the first door body 2a and the second door body 2b with screws or the like through FIG. 7).

＜Switching device＞

7 to 9, the opening and closing device 10 includes a base plate 101, a case plate 102 (lower case plate 103 and upper case plate 104), and a case base 105 (cover It is provided with a portion 106 and an arm portion 107), a center cam 108, a slide cam 109, a cocking shaft 111, a cam spring 112, and countersunk head screws 113, 114, and 115.

＜Base plate＞

The base plate 101 has a flat plate shape with two disk parts connected, and is a part that serves as the foundation for supporting the center cam 108 and the slide cam 109, and the case plate 102 and the center cam 108. ) has two through holes (101ha, 101hb) for mounting.

In addition, the base plate 101 has a through hole 101hc through which the tip portion of the caulking shaft 111, which rotatably supports the case plate 102 with respect to the base plate 101, is inserted. there is. However, the through hole 101hc of the base plate 101 is not limited to the case where the tip portion of the caulking shaft 111 is inserted into the through hole 101hc, and is larger than the shaft portion of the caulking shaft 111. It may be provided with a through hole 101hc having an inner diameter of such a size that only the tip portion with a small diameter can be inserted. In this case, the base plate 101 can prevent the caulking shaft 111 from entering the through hole 101hc beyond a predetermined length.

Additionally, the base plate 101 is disposed on the upper end surface (in the direction of arrow c) (hereinafter referred to as the “upper end surface”) of the blind rail 23 (FIG. 4) . However, the base plate 101 is not fixed to the upper surface of the blind rail 23.

＜Case plate＞

The case plate 102 is formed by combining the lower case plate 103 and the upper case plate 104. The lower case plate 103 has a substantially box shape with an opening upward (in the direction of arrow c) and an opening toward the center cam 108.

The lower case plate 103 has a bottom portion 103b, a side wall portion 103s, and a back wall portion 103z. The bottom portion 103b has a rectangular flat bottom portion 103bd and a flat protrusion 103bt that protrudes thinly and elongated from the bottom portion 103bd toward the center cam 108, and the protrusion 103bt is provided with a caulking seal. A through hole 103bth for inserting the shaft 111 is formed. That is, the inner diameter of the through hole 103bth of the protrusion 103bt is formed to be slightly larger than the diameter of the caulking shaft 111.

Additionally, the lower case plate 103 is formed with side wall portions 103s extending upward (in the direction of arrow c) from both ends of the bottom portion 103b.

The lower case plate 103 has a rectangular back wall portion 103z extending upward (in the direction of arrow c) from an end opposite to the protruding portion 103bt of the bottom portion 103b, and the back wall portion 103z A counterbore hole 103zh of a size capable of storing the head of the countersunk head screw 113 is formed almost in the center. The back wall portion 103z of the lower case plate 103 is formed to be higher than the side wall portion 103s.

The upper case plate 104 has substantially the same size and shape as the lower case plate 103, and has an approximate box shape that opens downward (in the direction of arrow d) and opens toward the center cam 108. Have. That is, the upper case plate 104 is shaped like the lower case plate 103 turned upside down.

The upper case plate 104 has a bottom portion 104b, a side wall portion 104s, and a back wall portion 104z. The bottom portion 104b has a rectangular flat bottom portion 104bd and a flat protrusion 104bt that protrudes thinly and elongated from the bottom portion 104bd toward the center cam 108, and the protrusion 104bt is provided with a caulking seal. A through hole 104bth for inserting the shaft 111 is formed. That is, the inner diameter of the through hole 104bth of the protrusion 104bt is formed to be slightly larger than the diameter of the caulking shaft 111.

In addition, the upper case plate 104 is formed with side wall portions 104s extending downward (in the direction of arrow d) from both ends of the bottom portion 104b, similar to the lower case plate 103.

The upper case plate 104 has a rectangular back wall portion 104z extending downward (in the direction of arrow d) from an end opposite to the protruding portion 104t of the bottom portion 104b, and the back wall portion 104z A female screw hole 104zh is formed at almost the center of the countersunk screw 113 and is screwed to the male screw portion. The back wall portion 104z of the upper case plate 104 is formed to be higher than the side wall portion 104s.

Additionally, the bottom portion 104bd of the upper case plate 104 has a female threaded hole 104bdh that screws into the male threaded portion of the countersunk screw 115 when mounted on the cover portion 106 of the case base 105. This is formed.

10(A) and (B), the case plate 102 is overlapped so that the back wall portion 104z of the upper case plate 104 is inside the back wall portion 103z of the lower case plate 103. Then, the counterbore hole 103zh and the female screw hole 104zh are arranged opposite each other and are integrated by screwing together with a countersunk head screw 113.

At this time, in the case plate 102, the side wall portion 103s of the lower case plate 103 and the side wall portion 104s of the upper case plate 104 are arranged to face each other in the vertical direction (direction of arrow cd), as described later. A space capable of accommodating the slide cam 109 is formed.

＜Case Base＞

The case base 105 is mounted on the case plate 102 and includes the first door body 2a and the second door body 2b of the door body 2 and the arms 3p and 3q of the hinge 3. It is a member mounted on.

The case base 105 includes a cover portion 106 of a substantially semi-elliptical cylindrical shape with an opening on the lower side (in the direction of arrow b), and an arm portion 107 integrated at an end of the cover portion 106. The cover portion 106 functions as a cover that covers the case plate 102 and the center cam 108, etc., and is a counterbore that accommodates the head of the countersunk screw 115 at a predetermined position on the upper surface 106a. It has a hole (106h).

The arm portion 107 is a substantially rectangular parallelepiped-shaped member with a predetermined length. The lower surface 107b of the arm part 107 and the upper surface 106a of the cover part 106 are substantially the same surface. That is, the arm portion 107 is formed to have a different height from the cover portion 106.

In addition, four through holes 107h are provided in the upper end surface 107a of the arm portion 107, and the first door body 2a, the second door body 2b, and the hinge 3 of the door body 2 are provided. ) of the arms 3p, 3q, and the case base 105 are used to be mounted integrally.

＜Center Cam＞

As shown in FIG. 11, the center cam 108 has a substantially rectangular shape in plan view, and includes a base 1081, a top plate 1082, and a bottom plate ( 1083, and a cam portion 1085 of approximately prismatic shape integrated and sandwiched between the top plate portion 1082 and the bottom plate portion 1083.

The base 1081 of the center cam 108 is a substantially prismatic portion extending in the vertical direction (arrow cd direction). The base 1081 has two through holes 1081h penetrating the upper and lower surfaces. On the inner peripheral surface of this through hole 1081h, a female thread portion that is screw-engaged with the male thread portion of the two countersunk head screws 114 is formed.

Therefore, the center cam 108 connects two countersunk head screws 114 inserted from the through holes 101ha and 101hb of the base plate 101 to the female threads of the two through holes 1081h provided in the base 1081. By screwing with the base plate 101, it is fixed in a non-rotatable state.

The top plate portion 1082 of the center cam 108 is a rectangular portion extending along the horizontal direction from the upper end of the base 1081 (in the direction of arrow c), and the bottom plate portion 1083 is a portion of the base 1081. It is a rectangular part extending along the horizontal direction from the lower end (direction of arrow d). The top plate portion 1082 and the bottom plate portion 1083 have the same shape and size, and are arranged to face each other.

The top plate portion 1082 is not on the same surface as the upper surface of the base 1081, but is installed at a position lowered by a predetermined distance from the upper surface. Likewise, the bottom plate portion 1083 is not on the same plane as the lower end surface 1081b of the base 1081, but is installed at a position raised upward by a predetermined distance from the lower end surface 1081b. Specifically, the distance between the lower surface 1081b of the base 1081 and the lower surface 1083b of the bottom plate 1083 is the bottom 103b of the lower case plate 103 in the case plate 120. It is set larger than the thickness of .

Therefore, when the case plate 102 is mounted via the cocking shaft 111 with respect to the center cam 108 fixed to the base plate 101, the base 1081 of the base plate 101 and the center cam 108 The protrusion 103t of the bottom 103b of the lower case plate 103 can be placed in the gap with the lower surface 1081b in a non-contact state with the base plate 101.

Meanwhile, when the protrusion 104t of the upper case plate 104 is disposed on the upper surface of the base 1081 of the center cam 108, the upper surface of the base 1081 and the upper surface of the protrusion 104t are substantially the same surface. This happens.

Between the top plate portion 1082 and the bottom plate portion 1083, a cam portion 1085 is installed in an integrated state. The cam portion 1085 is a substantially prismatic portion extending in the horizontal direction from the center of the base 1081 like the top plate portion 1082 and the bottom plate portion 1083, but is larger than the top plate portion 1082 and the bottom plate portion 1083. The length in the horizontal direction is short. That is, the cam portion 1085 is in a concave state without protruding outward from the top plate portion 1082 and the bottom plate portion 1083.

The cam portion 1085 has two flat cam surfaces 1085a for rotating while the slide cam 109 described later is in contact (sliding contact), and two smoothly curved curved cam surfaces 1085c. there is. Curved cam surfaces 1085c are connected to both ends of the flat cam surface 1085a, and the overall cam surface 1085ac is approximately U-shaped.

Additionally, the cam portion 1085 has an arc-shaped protruding surface 1085p between the two cam surfaces 1085a that slightly protrudes beyond the cam surface 1085a. However, the protruding surface 1085p is a surface that does not contact the slide cam 109, which will be described later, and the surface of the protruding portion ( It is nothing more than a surface.

The center cam 108 has a through hole 1087 that penetrates all of the top plate portion 1082, the cam portion 1085, and the bottom plate portion 1083, and the case plate 102 is connected to the through hole 1087. and a cocking shaft 111 for holding the slide cam 109 is inserted. That is, the through hole 1087 of the center cam 108 is formed to be slightly larger than the diameter of the cocking shaft 111.

In addition, the through hole 1087 of the center cam 108 includes a through hole 103bth of the projection 103bt of the lower case plate 103 and a through hole 104bth of the projection 104bt of the upper case plate 104. are arranged to face each other. Accordingly, the caulking shaft 111 is inserted so as to penetrate the upper case plate 104, the center cam 108, and the lower case plate 103.

＜Caulking shaft＞

The caulking shaft 111 is an axial member made of plastically deformable metal and has a diameter slightly smaller than the inner diameter of the through hole 101hc of the base plate 101. The tip portion of the cocking shaft 111 is inserted into the through hole 101hc of the base plate 101 after inserting the upper case plate 104, the center cam 108, and the lower case plate 103. . At this time, the tip portion of the caulking shaft 111 protruding downward from the base plate 101 is pressed and plastically deformed, thereby caulking the lower surface of the base plate 101.

At this time, the distance from the upper surface of the base plate 101 to the lower surface of the head 111a of the caulking shaft 111 is the distance from the upper surface of the upper case plate 104 in the case plate 102 to the lower case plate. It is larger than the distance to the bottom surface of (103). Therefore, the lower case plate 103 of the case plate 102 does not contact the base plate 101.

As a result, as shown in FIGS. 10(A) and 10(B), when the case plate 102 accommodating the slide cam 109 with respect to the center cam 108 is held by the cocking shaft 111, the lower case Since the plate 103 is in a non-contact state with the base plate 101, the case plate 102 can be rotated smoothly with respect to the center cam 108 without sliding resistance.

＜Slide Cam＞

As shown in FIGS. 12(A) to 12(E), the slide cam 109 is formed of a material such as resin and is integrated with the main body 1091 having a substantially rectangular parallelepiped shape, and the main body 1091, It is provided with an approximately rectangular parallelepiped-shaped contact portion 1092 that contacts the center cam 108.

In the main body portion 1091, two storage holes 1091h are provided in parallel along the horizontal direction (direction of arrow ab) on the back surface 1091b on the opposite side to the contact portion 1092. This storage hole 1091h is a bottomed hole with a predetermined depth, and is used to accommodate a cam spring 112, which will be described later. The depth of the storage hole 1091h is shorter than the length of the cam spring 112.

Therefore, when the two cam springs 112 are accommodated in the two storage holes 1091h of the main body 1091, they are not completely accommodated, and about half of the cam springs 112 are on the rear surface (1091h) of the main body 1091. It protrudes rearward from 1091b) (see FIG. 13).

The contact portion 1092 has a substantially rectangular parallelepiped shape that is smaller overall than the main body portion 1091, and is provided at the center of the front face 1091a of the main body portion 1091. The contact portion 1092 includes two flat contact surfaces 1092a that slide in contact with the cam surfaces 1085a and 1085c of the center cam 108, and a concave shape formed between the two contact surfaces 1092a. It has a face (1092r).

The concave surface 1092r of the contact portion 1092 is formed to correspond to the protruding surface 1085p of the cam portion 1085 of the center cam 108, and does not contact the cam portion 1085 of the center cam 108. This is not the case.

＜Spring for cam＞

The cam spring 112 is a compression coil spring accommodated in the storage hole 1091h of the main body 1091 of the slide cam 109. The cam spring 112 has one end accommodated in the receiving hole 1091h of the main body 1091, while the other end protrudes from the receiving hole 1091h and is attached to the case plate 102. It is placed in contact with the back wall portion 104z of the upper case plate 104.

That is, the cam spring 112 biases the contact part 1092 of the slide cam 109 against the cam part 1085 of the center cam 108, and the cam part 1085 of the center cam 108 and the slide It acts to maintain the contact state of the contact portion 1092 of the cam 109.

＜Assembling sequence of switchgear＞

The assembly sequence for assembling the opening and closing device 10 of this configuration will be described next. First, assemble the center cam 108, slide cam 109, and case plate 102.

Specifically, the contact portion 1092 of the slide cam 109 is brought into contact with the cam portion 1085 of the center cam 108. At this time, the slide cam 109 is inserted between the top plate portion 1082 and the bottom plate portion 1083 of the center cam 108, so the movement of the slide cam 109 in the vertical direction is restricted. Next, one end side of the two cam springs 112 is accommodated in the storage hole 1091h of the main body portion 1091 of the slide cam 109.

In that state, the three bodies of the center cam 108, the slide cam 109, and the cam spring 112 are disposed on the lower case plate 103, and the rear end side of the cam spring 112 ( The upper case plate 104 and the lower case plate 103 are arranged to face each other so that the rear end is pressed against the inner surface of the back wall portion 104z of the upper case plate 104. At this stage, the slide cam 109 is accommodated in the case plate 102, and the slide cam 109 is biased against the center cam 108 by the cam spring 112.

Thereafter, the counterbore hole 103zh of the back wall 103z of the lower case plate 103 and the female screw hole 104zh of the back wall 104z of the upper case plate 104 are arranged to face each other. By screwing together with the screw 113, both the lower case plate 103 and the upper case plate 104 are integrated to form the case plate 102.

And, the through hole 101hc of the base plate 101, the through hole 103bth of the lower case plate 103, the through hole 1087 of the center cam 108, and the through hole 1087 of the upper case plate 104. When the caulking shaft 111 is inserted into all through holes with the holes 104bth all facing each other, the distal end of the caulking shaft 111 protrudes from the bottom of the base plate 101, so that the protruding portion Caulk. As a result, the case plate 102 accommodating the slide cam 109 is held rotatably in the horizontal direction via the cocking shaft 111.

Next, the countersunk screw 115 is inserted into the through hole 106h of the cover portion 106 in the case base 105, and the female threaded hole ( The case base 105 and the case plate 102 are coupled by screwing with 104bdh). As a result, the case base 105 is rotatably mounted on the center cam 108 via the case plate 102.

Finally, fix the center cam 108 to the base plate 101. Specifically, two countersunk head screws 114 are inserted from below into the through holes 101ha and 101hb of the base plate 101, and the through holes 1081h of the base 1081 in the center cam 108 are inserted. ), the center cam 108 is fixed in a non-rotatable state with respect to the base plate 101 by screwing it with the female thread formed on the inner peripheral surface of the center cam 108.

At this time, the base 1081 of the center cam 108 is in contact with the base plate 101, but the protrusion 103bt of the lower case plate 103 is in contact with the upper surface of the base plate 101. Since the case plate 102 is in an idle state, the case plate 102 can be rotated with respect to the base plate 101 without sliding resistance.

In this way, the base plate 101, case plate 102, case base 105, center cam 108, slide cam 109, and cam spring 112 are all installed to complete the opening and closing device 10. do.

This opening and closing device 10 is connected to the first door receiving portion 22a of the first door body 2a and the first door receiving portion 22a together with the hinge 3 through the through hole 107h of the arm portion 107 of the case base 105. 2 It is fixed to the second door accommodating portion 22b of the door body 2b with a fastener such as a screw or bolt not shown. As a result, the folding door device 1 equipped with the opening and closing device 10 is completed.

＜Action and Effect＞

In the opening and closing device 10 in the first embodiment, as shown in FIG. 13(A), the first door body 2a and the second door body 2b are in a closed state lined up in a straight line ( 1), the two contact surfaces 1092a of the contact portion 1092 of the slide cam 109 are two flat cam surfaces 1085a of the cam portion 1085 of the center cam 108 at two locations. is in contact with

At this time, the slide cam 109 is pressed against the center cam 108 by the biasing force of the cam spring 112, so it is closed unless the user applies an external force such as pulling or pushing the first door body 2a. The state remains in place.

When the first door body 2a is manipulated by the user, the door body 2 is folded at the boundary between the first door body 2a and the second door body 2b through the hinge 3 (FIG. 2 ) is in the open state (Figure 3). At this time, in the opening and closing device 10, as shown in FIG. 13(B), the two contact surfaces 1092a of the contact portion 1092 of the slide cam 109 are aligned with the cam portion 1085 of the center cam 108. ) moves while sliding from the two flat cam surfaces 1085a to the curved cam surface 1085c.

When the first door body 2a and the second door body 2b are fully open or in an intermediate state between the closed state and the open state (FIG. 3), as shown in FIG. 13(B), the slide cam Of the two contact surfaces 1092a of the contact portion 1092 at 109, only one contacts the curved cam surface 1085c of the cam portion 1085 of the center cam 108 at one location.

In this case, the two cam springs 112 are strongly contracted and the slide cam 109 is strongly pressed against the center cam 108, but one contact surface of the contact portion 1092 of the slide cam 109 ( Since only 1092a) is in contact, an imbalance occurs in the pressing force caused by the two cam springs 112.

In addition, since the cam surface 1085c with which only one contact surface 1092a of the contact portion 1092 of the slide cam 109 is in contact is a curved surface, the biasing force caused by the cam spring 112 causes the cam surface 1085c to ) The corresponding slide cam 109 begins to move to follow the curved surface of ).

That is, since the curved cam surface 1085c of the cam portion 1085 of the center cam 108 is gently inclined toward the flat cam surface 1085a, the contact portion 1092 of the slide cam 109 is It rotates gently while sliding with the cam portion 1085 and returns to the closed state (FIG. 1 and FIG. 13(A)).

In this way, one contact surface 1092a of the contact portion 1092 of the slide cam 109 contacts the center cam 108 of the slide cam 109 at one point, while the other contact surface ( Since the deflection of the contact point occurs because 1092a) is not in contact, the slide cam 109 tries to return to the closed state, that is, the normal position, due to the biasing force caused by the two cam springs 112. That is, when the first door body 2a and the second door body 2b are fully open or in an intermediate state between the open state and the closed state, the first door body 2a and the second door body 2b slide due to the biasing force of the two cam springs 112. The cam 109 is in an unstable non-home position trying to return to its home position.

Therefore, the slide cam 109 of the opening and closing device 10 maintains a closed position when pressed against the center cam 108 by the biasing force of the two cam springs 112, and the first door body 2a ), when the slide cam 109 is rotated by an operation (external force), the contact point of the contact portion 1092 with respect to the center cam 108 is deflected, causing it to rotate between an irregular position that tries to return to the normal position. do.

Therefore, in the opening and closing device 10, after changing the first door body 2a and the second door body 2b of the door body 2 from the closed state to the open state, the user does not operate the center cam ( 108), the slide cam 109, and the biasing force of the cam spring 112 can automatically return it to the closed state.

That is, in the opening and closing device 10, the slide cam 109 slides and rotates while being pressed against the center cam 108 by the biasing force of the cam spring 112, thereby causing the first door body 2a and the second door body. (2b) can freely move between the open and closed states.

Additionally, in the opening and closing device 10, the contact portion between the center cam 108 and the slide cam 109 is covered by the cover portion 106 of the case base 105, thereby avoiding the risk of the user's fingers being caught. can do.

In addition, in the opening and closing device 10, instead of using a spiral spring as in the past, two cam springs 112 made of compression coil springs are used, eliminating the need to use stronger compression coil springs than necessary, improving durability. Even if the door body 2 is repeatedly opened and closed without dropping it, the risk of damage can be reduced.

In addition, the opening and closing device 10 is entirely accommodated in the first door accommodating part 22a of the first door body 2a and the second door accommodating part 22b of the second door body 2b. , As a folding door device (1), an exterior design with excellent appearance can be realized.

(2-2) Second embodiment

As shown in Fig. 14 (A) and (B), where the same reference numerals are given to corresponding parts as in Fig. 13, in the opening and closing device 10 of the second embodiment, the center of the first embodiment A center cam 208 of a different shape from the cam 108 is used.

Specifically, the center cam 208 has the same basic shape as the center cam 108, but is characterized by being provided with a cam portion 2085 of a different shape from the cam portion 1085 of the center cam 108. In this case as well, the cam portion 2085 is concave without protruding from the top plate portion 1082 and the bottom plate portion 1083.

The cam portion 2085 includes two flat cam surfaces 2085a for rotating while the slide cam 109 is in contact with each other, a flat cam surface 2085b extending perpendicular to the cam surface 2085a, and a cam surface 2085a and a cam surface ( 2085b) is connected to have an inclined surface 2085c inclined at a predetermined angle. Additionally, instead of the inclined surface 2085c, a smoothly curved curved surface may be used.

Additionally, the cam portion 2085 is provided with a projection 2085p that slightly protrudes from the cam surface 2085b, and the projection 2085p functions as a stopper that regulates the rotation of the slide cam 109.

In this case, as shown in Figures 14(A) and 14(B), as a default, the first door body 2a and the second door body 2b of the door body 2 are maintained in the fully opened open state as the fixed position. As shown in FIG. 14(B), even when the first door 2a and the second door 2b of the door 2 are completely closed and in a closed state (abnormal position), the door automatically closes. Transition to open state.

As shown in Fig. 14(A), when the first door body 2a and the second door body 2b are in a parallel open state, the two contact surfaces of the contact portion 1092 of the slide cam 109 (1092a) is in contact with the two flat cam surfaces 2085a of the cam portion 2085 of the center cam 208 at two locations.

At this time, the slide cam 109 is pressed against the flat cam surface 2085a of the cam portion 2085 of the center cam 208 by the biasing force of the cam spring 112, so the user operates the first door body 2a. Unless otherwise done, the open state, i.e. the correct position, is maintained.

When the first door 2a is operated by the user, the first door 2a and the second door 2b are opened and closed through the hinge 3 (Figure 14(B) )). At this time, in the opening and closing device 10, the slide cam 109 comes into contact with the protrusion 2085p that functions as a stopper, thereby regulating the movement of the first door body 2a and the second door body 2b.

However, only one of the two contact surfaces 1092a of the contact part 1092 of the slide cam 109 contacts the cam surface 2085a of the cam part 2085 of the center cam 208 at one point. , Since the other contact surface 1092a faces the inclined cam surface 2085c, unbalance in the pressing force caused by the two cam springs 112 occurs.

At this time, since the cam surface 2085c of the cam portion 2085 of the center cam 208 is inclined, the slide cam 109 is forced to follow the inclined surface of the cam surface 2085c by the biasing force generated by the cam spring 112. It begins to move, and the contact portion 1092 of the slide cam 109 rotates gently in a sliding state and returns to the open state again (FIG. 1 and FIG. 14(A)).

As a result, the first door body 2a and the second door body 2b are not held in an irregular position such as a closed state, and the contact portion 1092 in the slide cam 109 is the center cam 208. ) and returns to the open state again (FIG. 3 and FIG. 14(A)).

Likewise, in the opening and closing device 10 according to the second embodiment, the first door body 2a and the second door body 2b of the door body 2 are changed from the open state (normal position) to the closed state. After setting it to the (off-position) position, it can be automatically returned to the open state by the biasing force of the center cam 208, slide cam 109, and cam spring 112 without any operation by the user.

3. Other embodiments

In addition, in the first and second embodiments described above, the case where the two cam springs 112 are used to automatically change from the open state to the closed state and from the closed state to the open state is described. However, the present invention is not limited to this, and the number of cam springs 112 may be singular or plural, such as one or three.

In addition, in the first and second embodiments of the present invention, a case where a compression coil spring is used as the cam spring 112 has been described, but the present invention is not limited to this and the slide cam 109 is used. As long as a pressing force can be applied to the center cams 108 and 208, a pipe-shaped elastic body or a column-shaped elastic body may be used.

Furthermore, in the first and second embodiments of the present invention, the door body 2 is pulled forward or the door front side of the first door body 2a is pushed inward. has been described in the case of opening and closing, but the present invention is not limited to this, and the door 2 can be opened and closed even when the same operation is performed on the second door 2b.

The opening and closing device 10 and the folding door device 1 according to the present invention are not limited to the above embodiment. Additionally, a person skilled in the art can appropriately modify the opening and closing device 10 and the folding door device 1 of the present invention according to conventionally known knowledge. These modifications are, of course, included in the scope of the present invention as long as they still have the structure of the present invention.

One… Folding door device, 2… Door body, 2a… First door body, 2b... 2nd door body, 3… Hinge, 3a… Gear case, 3c… Cover, 3ga, 3gb… Gear, 3p, 3q… Ah, 4… Guide rail, 10… Switchgear, 21a… First door main body, 22a... First door receiving portion, 21b... Second door main body, 22b... Second door receptacle, 23... Blind rail, 23a… First shade part, 23b... Second shade part, 101... Base plate, 102… Case plate, 103… Lower case plate, 104... Upper case plate, 105... Case base, 108, 208… Center cam, 109… Slide cam, 111… Caulking shaft, 112… Spring for cam, 113~115… Countersunk head screw, 106… Cover part, 107... Wanbu, 1081… Donation, 1082… Cheonpanbu, 1083… Bottom plate, 1085, 2085… Cambu, 1091… Main body, 1092… Junction.

Claims (5)

a base plate,
a pair of center cams fixed to the base plate so as to correspond to a first door body and a second door body that can be folded in two and are free to open and close;
a pair of slide cams slidably disposed relative to the pair of center cams;
an elastic body that provides a biasing force to press the slide cam relative to the center cam;
A pair of case plates rotatably mounted on each of the pair of center cams and accommodating the pair of slide cams and the elastic body.
Equipped with
When the slide cam slides and rotates while being pressed against the center cam by the biasing force, the first door body and the second door body transition between an open state and a closed state.
Switchgear. In claim 1,
The slide cam has a fixed position maintaining the open or closed state when pressed against the center cam by the biasing force, and an external force on the first door body or the second door body. Rotating between non-stationary positions trying to return to the above-mentioned regular position
Switchgear. In claim 2,
In the normal position, the slide cam is pressed against the center cam at two points, and in the irregular position, the slide cam is pressed against the center cam at one point.
Switchgear. In claim 1,
The elastic body is a compression coil spring that provides the biasing force.
Switchgear. A door body consisting of a first door body and a second door body that can be folded in two and can be opened and closed,
a pair of center cams fixed to the base plate to correspond to the first door body and the second door body, respectively, a pair of slide cams slidably disposed with respect to the pair of center cams, and the center An elastic body that provides a biasing force to press the slide cam with respect to the cam, and a pair of case plates that are rotatably mounted on each of the pair of center cams and accommodate the pair of slide cams and the elastic body. an opening and closing device including a pair of case bases mounted on the case plate;
Provided with a hinge fixed to the first door body and the second door body through the pair of case bases,
In the opening and closing device, when the slide cam slides and rotates while being pressed against the center cam by the biasing force, the first door body and the second door body transition between an open state and a closed state.
Folding door device.