HK1168401B - Door opening/closing system and catch therefor - Google Patents

Description

Door/window opening/closing system and retainer for door/window opening/closing system

Technical Field

The present invention relates to a door/window opening/closing system and a retainer for a door/window opening/closing system for assisting opening/closing of doors and windows such as sliding doors (including sliding windows, hereinafter the same) and sliding doors (including sliding windows, hereinafter the same) of buildings and furniture.

Background

Doors and windows of buildings or furniture can be divided into push doors (door leaves), sliding doors and the like. The push door is a door window which is opened by rotating. The sliding door is a door window that slides along a groove of a frame constituted by a lintel or a doorsill to open and close left and right.

In order to assist the opening and closing operation of these doors and windows, a door and window opening and closing system is provided (for example, see patent document 1). The door opening/closing system includes a retainer attached to one of the door and the window or a frame surrounding the door and a door opening/closing device attached to the other of the door and the window or the frame and cooperating with the retainer.

The door and window opening and closing device is provided with a pull arm matched with the bearing seat. Before the door and window are closed, the pull arm is in an open state. When the door and window is closed, the draw arm is matched with the bearing seat, and the draw arm rotates towards the closing direction by taking the arm shaft as the center. Accordingly, the force in the closing direction can be applied to the door and window. When the pull arm rotates to the closed state, the door and the window are in the closed state. On the contrary, when the door and window in the closed state is opened, the pull arm rotates in the opening direction around the arm shaft. When the door and window is opened to a given angle, the pull arm and the bearing seat are disengaged, and the pull arm is in an open state.

Prior art documents

Patent document

Patent document 1: japanese laid-open patent publication No. 2009-114823

Disclosure of Invention

Problems to be solved by the invention

However, when the open pull arm is erroneously set to the closed state due to a disturbance by a stranger or the like, the retainer and the pull arm cannot be engaged with each other even when the door window is closed.

Here, in order to prevent the door from being swung when the door is in the closed state, even if the door is abutted against the pull arm of the frame door opening and closing device, a force in the closing direction is applied to the door. That is, in the door/window closed state, the pull arm itself is not completely rotated to the closed state. Therefore, when the pull arm in the open state is erroneously set in the closed state due to a disturbance of a stranger or the like, the pull arm is further rotated in the closing direction to be in the completely closed state.

The invention aims to provide a door and window opening and closing system and a retainer for the door and window opening and closing system, which can enable a retainer to be matched with a pull arm even if the pull arm is in a complete closing state due to misoperation such as disturbance of a layman.

Means for solving the problems

In order to solve the above problems, one aspect of the present invention is a door/window opening/closing system including a holder attached to one of a door/window and a frame, and a door/window opening/closing device attached to the other of the door/window and the frame and having a pull arm that engages with the holder; when the door and window is closed, the draw arm of the door and window opening and closing device is matched with the bearing seat, and the draw arm rotates by taking the arm shaft as a center to apply force towards the closing direction to the door and window; the catch is characterized in that the catch comprises a catch base body mounted on one of a door window or a frame, and a catch shaft assembled on the catch base body in a sliding manner along an axial direction and matched with the pull arm; the bearing seat shaft is provided with a main body part which can be matched with the pull arm and a step part which is arranged at the front end of the main body part and can be matched with the pull arm; the step portion of the socket shaft is engaged with the pull arm in a state where the pull arm is further rotated in a closing direction from a state where the body portion of the socket shaft is engageable with the pull arm.

Another aspect of the present invention is a door/window opening/closing system including a holder attached to one of a door/window and a frame, and a door/window opening/closing device attached to the other of the door/window and the frame and including a pull arm that engages with the holder; when the door and window is closed, the draw arm of the door and window opening and closing device is matched with the bearing seat, and the draw arm rotates by taking the arm shaft as a center to apply force towards the closing direction to the door and window; the catch is characterized in that the catch comprises a catch base body mounted on one of a door window or a frame, and a catch shaft assembled on the catch base body in a sliding manner along an axial direction and matched with the pull arm; the bearing seat shaft is provided with a main body part which can be matched with the pull arm and a step part which is arranged at the front end of the main body part and can be matched with the pull arm; and steps are arranged around the bearing seat shaft.

Another aspect of the present invention is a bearing for a door/window opening/closing system, which applies a force in a closing direction to a door/window when the door/window is closed; the catch is characterized in that the catch comprises a catch base body mounted on one of a door window or a frame, and a catch shaft assembled on the catch base body in a sliding manner along an axial direction and matched with the pull arm; the bearing seat shaft is provided with a main body part which can be matched with the pull arm and a step part which is arranged at the front end of the main body part and can be matched with the pull arm; and steps are arranged around the bearing seat shaft.

Effects of the invention

According to the present invention, the stepped portion is provided at the tip of the retainer shaft, and the stepped portion of the retainer shaft is engaged with the pull arm in a state where the pull arm is further rotated in the closing direction from a state where the main body portion of the retainer shaft is engaged with the pull arm. Therefore, even if the pull arm is completely closed due to a malfunction such as a disturbance by a man, the pull arm can be returned to the return state in which the retainer and the pull arm are engaged with each other.

Drawings

Fig. 1 is an external perspective view of a door opening and closing device of a door opening and closing system according to an embodiment of the present invention.

Fig. 2 is an external perspective view of the door opening and closing device with the door embedded therein (in the drawing, (a) shows a state where the arm is closed, and (b) shows a state where the arm is being opened).

Fig. 3 is a perspective view of a shoe of the door opening and closing system.

Fig. 4 is a schematic view showing the operation of the door opening and closing device when the door is opened and closed (in the drawing, (a) shows a state where the door is closed and the stay arm grasps the receptacle shaft, and in the drawing, (b) shows a state where the door is closed).

Fig. 5 shows the door opening and closing device and the retainer attached to the door and the frame (in the figure, (a) shows a side view, and in the figure, (b) shows a front view, and in the figure, (c) and (d) are sectional views corresponding to (a) and (b) in the figure).

Fig. 6 is an exploded perspective view of the door opening and closing device.

Fig. 7 is a sectional view of the door opening and closing device.

Fig. 8 is an operation diagram of the door opening and closing device (in the drawing, (a) shows a draw arm closed state, (b) shows a draw arm in the process of opening, and (c) shows a draw arm open state).

Fig. 9 is a detailed drawing of the arm (in the drawing, (a) shows a plan view, (b) shows a front view, and (c) shows a sectional view taken along a-a).

Fig. 10 is a detailed view of the arm base (fig. (a) shows a plan view, fig. (b) shows a front view, fig. (c) shows a left view, and fig. (d) shows a right view).

Fig. 11 is a perspective view of the socket.

Fig. 12 is an exploded perspective view of the socket.

Fig. 13 is a schematic view showing a relationship between the retainer and the arm (in the figure, (a) shows a state where the retainer shaft is fitted into the groove of the arm, and (b) shows a state where the small-diameter portion of the retainer shaft is fitted into the groove of the arm).

FIG. 14 is a perspective view of another example of a retainer.

Fig. 15 is an exploded perspective view of another example of the retainer.

FIG. 16 is a perspective view of another example of a retainer.

Fig. 17 is an exploded perspective view of another example of the retainer.

Detailed Description

Hereinafter, a door opening and closing system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The door opening and closing system according to the present embodiment is used to assist the door opening and closing operation, and includes a holder attached to the frame and a door opening and closing device attached to the door and having an arm that engages with the holder.

Fig. 1 is a perspective view showing an external appearance of the door opening and closing device. The main body case 2 of the door opening and closing device 1 is formed in an elongated rectangular body shape. A cutout 3 is formed in the top 2a of the main body case 2, and a pull arm 4 is disposed in the cutout 3. The arm 4 can be rotated in the horizontal direction about the arm shaft 5, and is retracted from the notch 3 (see fig. 2).

As shown in fig. 2(a), a square hole 6 corresponding to the outer shape of the main body case 2 is cut in the upper surface of the door d, and the door opening/closing device 1 is embedded in the hole 6. On the upper surface of the door d, a notch 7 is formed at a position corresponding to the notch 3 of the main body case 2 so that the pull arm 4 can be retracted. Fig. 2(a) shows the closed state of the pull arm 4. Fig. 2(b) shows a state where the pull arm 4 is rotated from the closed state and protrudes from the notch 7 of the door d.

Fig. 3 shows the shoe 8 which cooperates with the door opening and closing device 1. Fig. 3 shows a state of the retainer 8 attached to the frame f surrounding the upper side of the door d as viewed from the lower side. The retainer 8 includes a retainer base 11 fixed to the lower surface of the frame f by a countersunk head screw 10, and a retainer shaft 12 protruding from the retainer base 11. As shown in fig. 4(a), when the door d is closed to a certain angle, the open pulling arm 4 catches the catch shaft 12 of the catch 8. The arm 4 is rotated in the closing direction about the arm shaft 5 in a state where it grips the socket shaft 12. Then, as shown in fig. 4(b), the pulling arm 4 puts the door d in the fully closed state.

Sometimes the door d is not tightly closed when coming out of the room and the door d is lightly closed. However, even if the door d is closed slightly, the door d can be completely closed by the pull arm 4 of the door opening/closing device 1 catching the receptacle shaft 12. Further, when the opened door d is closed suddenly by wind or the like, the door opening/closing device 1 alleviates the impact of the door d and gradually closes the door d. The door opening/closing device 1 has not only a function of pulling the door d but also a function of slowly moving the door d.

Fig. 5 shows a state where the door opening/closing device 1 and the shoe 8 are mounted on the door d and the frame f. In the figure, (a) shows a side view, and in the figure, (b) shows a front view. In the figure, (c) and (d) are sectional views corresponding to (a) and (b). The socket 8 is fixed to the frame f by means of countersunk screws 10. The door opening/closing device 1 is fixed to the door d by a stopper screw 13. As shown in the figure, when the door d is closed, the arm 4 of the door opening/closing device 1 is also closed. However, strictly speaking, the arm 4 of the door opening/closing device 1 also slightly rotates in the opening direction from the closed state in the closed state of the door d. This is to apply a force in the closing direction to the closed door d by the arm 4 of the door opening/closing device 1 to prevent the door d from shaking.

Fig. 6 is an exploded perspective view of the door opening and closing device. The door opening/closing device 1 includes: the body case 2, an arm base 21 assembled to the body case 2, a pull arm 4 rotatably supported by the arm base 21, a biasing mechanism 22 for applying a torque in an opening direction or a closing direction to the pull arm 4, and a damper mechanism 23 for damping a shock when the pull arm 4 is closed. The arm base 21 is disposed at the center in the longitudinal direction of the main body case 2. The biasing mechanism 22 is disposed on one longitudinal side of the main body casing 2, and the damper mechanism 23 is disposed on the other longitudinal side of the main body casing 2.

The basic construction of each component is as follows. The main body case 2 has a top portion 2a and a pair of side wall portions 2 b. The sectional shape of the main body case 2 is formed in an コ -letter shape. Openings 24a, 24b for assembling members are formed on the lower surface and both end surfaces in the longitudinal direction of the main body case 2. Further, a notch 3 for making the arm 4 useless is formed in the top 2a of the main body case 2. The main body case 2 is manufactured by a sheet metal process of bending a thin plate.

The arm base 21 is disposed at the center in the longitudinal direction of the main body case 2, and is a key component in terms of structure and assembly. The arm base 21 is formed substantially in the shape of コ with opposing 1 st and 2 nd wall portions 21a, 21 b. The arm 4 is rotatably coupled to the arm base 21 by inserting the arm 4 between the 1 st and 2 nd wall portions 21a, 21b and passing the arm shaft 5 through the arm base 21 and the arm from below. After the pull arm 4 is coupled to the arm base 21, the arm base 21 is inserted into and coupled to the main body case 2. The coupling of the arm base 21 and the main body casing 2 may employ rivets, screws, or the like. Mounting holes 21c, 2c for coupling the arm base 21 to the body casing 2 are opened in the arm base 21 and the body casing 2.

The arm 4 rotates about the arm shaft 5. The 1 st and 2 nd link shafts 26 and 27 are inserted into the arm 4 at positions eccentric to the arm shaft 5. As shown in fig. 7, the force of the coil spring 28 of the additional force mechanism 22 is always applied to the 1 st link shaft 26. By the spring force of the coil spring 28, a force pulling the door d acts on the pull arm 4. The slider 31 of the damper mechanism 23 is coupled to the 2 nd link shaft 27. When the arm 4 is rotated in the closing direction, the slider 31 presses the head of the rod 32a of the damper 32. For this reason, even if the pull arm 4 is intended to be rapidly rotated in the closing direction, the damper 32 rotates the pull arm 4 slowly.

As shown in fig. 6, the biasing mechanism 22 includes the 1 st link shaft 26, the link plate 33, the slide spring case 34, the coil spring 28, and the spring seat 35.

The pull arm 4 is formed with a slit 4 a. The 1 st link shaft 26 is passed through the arm 4 and the link piece 33 from above in a state where the link piece 33 is sandwiched in the slit 4a, whereby the link piece 33 is coupled to the arm 4. A spring coupling shaft 36 is fitted into the other end of the link plate 33. By means of the spring coupling shaft 36, the sliding spring housing 34 is coupled to the link plate 33.

The slide spring case 34 is assembled into the main body case 2 to be linearly movable. On the side surface of the slide spring case 34, a protrusion 34a elongated in a straight line is formed. A slit 2d into which the projection 34a is fitted is formed in the main body case 2. The linear movement of the slide spring case 34 relative to the main body case 2 is guided by the slit 2d of the main body case 2.

The slide spring case 34 is provided with a hole having a diameter slightly larger than the diameter of the coil spring 28, and the coil spring 28 is inserted into the hole. A spring seat 35 having a hole slightly larger than the diameter of the coil spring 28 is disposed on the opposite side of the slide spring case 34 by the coil spring 28. The coil spring 28 is compressed between the sliding spring case 34 and the spring seat 35. The spring seat 35 is fixed to the end of the main body case 2 by rivets, screws, or the like. The spring seat 35 and the body casing 2 are provided with mounting holes 35a, 2e for coupling the spring seat 35 to the body casing 2.

The damper mechanism 23 is constituted by the 2 nd link shaft 27, the slider 31, the damper 32, the damper seat 38, and the damper adjustment shaft 40.

The pull arm 4 is formed with a cutout 4b into which the slider 31 is inserted. The slider 31 is inserted into the cutout 4b of the arm 4, and the 2 nd link shaft 27 penetrates the arm 4 and the slider 31 from above, whereby the slider 31 is coupled to the arm 4. The slider 31 is formed with a long hole 31a through which the 2 nd link shaft 27 passes. This is for the slider 31 to move linearly when the pulling arm 4 rotates. As shown in fig. 7, the head of the stem 32a of the damper 32 is inserted into the slider 31. The linear movement of the slider 31 is guided by the wall surface 21d of the arm base 21 and the inner wall surface 2f of the main body case 2.

As shown in fig. 6, the damper 32 is a telescopic damper 32 in which an upper rod 32a is moved in a stroke direction with respect to a body portion 32 b. When the jack 32a is retracted relative to the body portion 32b, a damping force is generated that resists movement of the jack 32 a. In this example, two buffers 32 are used in combination up and down.

The damper base 38 is coupled to an end portion of the main body case 2 using a rivet, a screw, or the like. The shock absorber holder 38 and the main body case 2 are provided with mounting holes 38a, 2g for coupling the shock absorber holder 38 to the main body case 2. The damper seat 38 functions as a pressure-holding body of the damper 32. A damper adjustment shaft 40 for adjusting the strength of the damper 32 is assembled to the damper seat 38. The damper adjustment shaft 40 abuts the rear end portion of the damper 32. By rotating the damper adjustment shaft 40, the positions of the rear end portions of the upper and lower dampers 32 can be adjusted. One hole 41a of the three holes of the damper base 38 is a hole for attaching the door opening/closing device 1 to the door d. The damper adjustment shaft 40 is inserted into the remaining two left and right holes 41 b. The left and right holes 41b are provided corresponding to the right opening and the left opening of the door d. The opening direction of the door d is different from the direction in which the arm 4 comes out of the main body case 2. Two holes 41b are formed so as to correspond to two opening directions of the door d by one member. Further, the damper seat 38 is formed with a receiving portion 38b for receiving the upper and lower dampers 32. The two receiving portions 38b are also provided corresponding to the two opening directions of the door d. Further, since the position of the notch 3 of the main body case 2 is different depending on the opening direction of the door d, it is possible to cope with this by changing the sheet bending direction, and one die for the sheet is required.

The door opening and closing device 1 operates as follows. As shown in fig. 8(a), the arm 4 rotates from the closed state to the open state shown in fig. 8 (c). In the closed state of the arm 4, the arm 4 is urged by the spring force of the coil spring 28 of the urging mechanism 22 to rotate in the closing direction. When the pull arm 4 is rotated in the opening direction against the spring force of the coil spring 28, the change point of the biasing mechanism 22 is reached. When the pulling arm 4 is further rotated in the opening direction and exceeds the change point of the biasing mechanism 22, as shown in fig. 8(c), a force for rotating the pulling arm 4 in the opening direction is generated by the spring force of the coil spring 28. At the change point, the line connecting the arm shaft 5 and the 1 st link shaft 26 coincides with the extending direction of the link piece 33, and a force for rotating the arm 4 is not generated.

When the door d in the opened state shown in fig. 8(c) is closed, the pull arm is rotated counterclockwise. As shown in fig. 8(b), when the change point of the biasing mechanism 22 is exceeded, the pull arm 4 is urged to rotate in the closing direction by the spring force of the coil spring 28. The door d can be automatically closed. Further, as the draw arm 4 rotates in the closing direction, the slider 31 presses the head of the push rod 32a of the shock absorber 32. The pull arm 4 can be slowly rotated.

When the arm 4 is rotated in the closing direction, the slider 31 is brought into contact with the head of the stem 32a of the damper 32, and the damper 32 blocks the linear movement of the slider 31. On the other hand, when the arm 4 rotates in the opening direction, the slider 31 is separated from the head of the stem of the damper 32, and the damper 32 does not hinder the linear movement of the slider 31. This is because there is preferably no resistance when opening the door d. As shown in fig. 7, the slider 31 and the head of the lift pin 32a of the buffer 32 are not coupled, but the head of the lift pin 32a enters into the slider 31. When the slider 31 is separated from the damper 32, the slider 31 and the damper 32 are guided by the arm base 21 and the body casing 2 so that the slider 31 and the damper 32 are not released.

The door opening and closing device 1 is assembled as follows. As shown in FIG. 6, the link piece 33 is first put into the slit 4a of the arm 4, and the 1 st link shaft 26 is passed through the arm 4 from above to couple the link piece 33 to the arm 4. Next, the slider 31 is put into the cutout 4b of the arm 4, and the 2 nd link shaft 27 is passed through the arm 4 from above, thereby coupling the slider 31 to the arm 4. In a state where the link piece 33 and the slider 31 are coupled to the arm 4, the arm 4 is sandwiched between the 1 st and 2 nd wall portions 21a and 21b of the arm base 21, and the arm 4 is coupled to the arm base 21 through the arm shaft 5 from below.

Then, the arm base 21 is put into the main body case 2 in a state where the arm 4 is attached to the arm base 21. The arm base 21 is connected to the body casing 2 by inserting the arm shaft 5 through the top 2a of the body casing 2, fastening the end of the arm shaft 5 with a flat washer 43, and inserting rivets into the mounting holes 2c, 21c of the body casing 2 and the arm base 21, and riveting.

Next, the spring coupling shaft 36 is fitted into the link plate 33, the slide spring case 34 is fitted into the slit 2d of the main body case 2, and the slide spring case 34 is coupled to the spring coupling shaft 36. The coil spring 28 is put into the slide spring case 34, the spring seat 35 is inserted from the opening at the end of the main body case 2, rivets are inserted into the mounting holes 2e, 35a of the main body case 2 and the spring seat 35, and the spring seat 35 is coupled to the main body case 2 by riveting.

Next, the two dampers 32 are inserted into the arm base 21 from the openings of the opposite end portions of the main body casing 2. The damper base 38 is inserted from the body case 2, rivets are inserted into the mounting holes 2g and 38a of the body case 2 and the damper base 38, and the damper base 38 is coupled to the body case 2 by riveting.

By the above, the assembly of the entire components is completed. Since the arm base 21 is assembled into the main body case 2 in a state where the arm 4, the link piece 33, and the slider 31 are assembled to the arm base 21 in advance, the assembling work can be simplified. Only three members of the arm base 21, the spring base 35, and the damper base 38 are combined with the main body case 2.

The detailed construction of the pulling arm 4, the arm socket 21 and the shoe 8 is as follows. Fig. 9 gives a detailed view of the pull arm 4. The arm 4 includes: a main body 47 having a pull-arm shaft through-hole 44 and two link-shaft through-holes 45 and 46, and an arm 48 extending horizontally from the upper end of the main body 47. On the upper surface of the arm portion 48, a groove 48a for receiving the retainer shaft 12 of the retainer 8 is formed. The groove 48a extends from halfway of the arm portion 48 to the front end. As shown in the sectional view of fig. c, the wall portions 49 and 50 on both sides of the groove 48a have different heights in the left and right directions (in the figure, the upper and lower directions). With the draw arm 4 in the open position, the retainer shaft 12 enters the slot 48a from the open end of the slot 48 a. Then, the catch shaft 12 abuts against the upper wall portion 50, and the pull arm 4 is rotated. As the pulling arm 4 rotates, the retainer shaft 12 moves toward the inner closed end of the groove 48 a. When the rotation angle of the arm 4 exceeds the change point, the arm 4 automatically rotates in the closing direction by the spring force of the coil spring 28, and the lower wall portion 49 of the groove 48a abuts on the holder shaft 12. The arm 4 rotates to the closed state in a state where the wall portion 49 is engaged with the catch shaft 12. Accordingly, the door is closed.

The socket shaft 12 can enter the groove 48a of the arm 48 from the middle of the groove 48 a. The socket shaft 12 is assembled into the socket base 11 slidably in the axial direction (see fig. 11 and 12), which will be described later. When the draw arm 4 is in the closed state, the catch shaft 12 abuts on the lower wall portion 49 of the arm portion 48, and slides toward the catch base 11 while passing over the wall portion 49 and entering the groove 48 a. The lower wall portion 49 is formed with an inclined surface 49a to facilitate the entry of the retainer shaft 12 into the groove 48 a.

The body portion 47 of the arm 4 is provided with an arm shaft through hole 44 through which the arm shaft 5 passes, and two link shaft through holes 45 and 46 at positions eccentric to the arm shaft through hole. The 1 st and 2 nd link shafts 26 and 27 pass through the two link shaft through holes 45 and 46. A slit 4a into which the link piece 33 is inserted is also formed in the body portion 47 of the arm 4. The slit 4a is connected to the link shaft through hole 45. Further, the body portion 47 of the arm 4 is formed with a notch 4b into which the slider 31 is inserted. The notch 4b is connected to the link shaft through hole 46. The pull arm 4 is manufactured by resin extrusion molding.

Fig. 10 shows a detailed view of the arm base 21. The arm base 21 is formed in a substantially コ -shaped overall shape. The arm base 21 has: a 1 st wall part 21a supporting the lower end part of the arm shaft 5, and a 2 nd wall part 21b facing the 1 st wall part 21a and supporting the upper end part of the arm shaft 5. The 1 st wall portion 21a and the 2 nd wall portion 21b are opened with holes 60 through which the arm shaft 5 passes. The pull arm 4 is coupled to the arm base 21 by sandwiching the pull arm 4 between the 1 st wall portion 21a and the 2 nd wall portion 21b of the arm base 21, and passing the pull arm shaft 5 through the arm base 21 and the pull arm 4 from the lower side. Since the rotational movement of the pull arm 4 is guided by the 1 st and 2 nd wall portions 21a, 21b of the arm base 21, stable rotational movement of the pull arm 4 can be achieved. A mounting hole 21c for attaching the arm base 21 to the body casing 2 is formed in a side surface of the 1 st wall portion 21a of the arm base 21. A wall surface 21d is formed in the arm base 21 for guiding the slider 31, the damper 32, and the like.

An annular projection 62 is formed on the upper surface of the 2 nd wall portion 21 b. When the body casing 2 is inserted into the arm base 21, the annular projection 62 is fitted into the hole in the ceiling portion 2a of the body casing 2. The upper surface of the 2 nd wall portion 21b of the arm base 21 contacts the lower surface of the ceiling portion 2a of the main body case 2. The lower end of the arm shaft 5 is supported by the 1 st wall portion 21a having a large thickness, and the upper end of the arm shaft 5 is supported by the 2 nd wall portion 21b and the ceiling portion 2a of the main body case 2. By supporting the arm shaft 5 at both ends, the support strength of the arm shaft 5 can be improved. By supporting the upper end portion of the arm shaft 5 by the 2 nd wall portion 21b of the arm base 21 and the ceiling portion 2a of the main body case 2, the thickness of the 2 nd wall portion 21b of the arm base 21 can be made thin, the height of the door opening/closing device 1 can be reduced, and the hole on the upper surface of the door can be made shallow. Further, by providing the 1 st and 2 nd wall portions 21a and 21b in the arm base 21, it becomes easy to assemble the arm 4 in the arm base 21. The arm base 21 is manufactured by resin extrusion molding.

The arm base 21 may support at least one end of the arm shaft 5. For example, the arm base 21 may be provided with the 2 nd wall portion 21b, and the arm pulling shaft 5 may be supported between the 1 st wall portion 21a of the arm base 21 and the ceiling portion 2a of the main body case 2. Further, the arm shaft 5 may be supported only between the 1 st wall portion 21a and the 2 nd wall portion 21b of the arm base 21 without being supported by the ceiling portion 2a of the main body case 2.

Fig. 11 and 12 show details of the socket 8. Fig. 11 shows a perspective view of the shoe 8, and fig. 12 shows an exploded perspective view of the shoe 8. As shown in fig. 11, the retainer 8 includes a retainer base 11 attached to the frame f, and a retainer shaft 12 protruding from the retainer base 11. The arm 4 of the door opening and closing device 1 grips the catch shaft 12 of the catch 8 to open and close the door d.

As shown in fig. 12, the socket base 11 is formed in a rectangular shape. Four countersunk screw mounting holes 11a are formed at four corners of the bearing base body 11. A socket outer shaft 54 for guiding the socket shaft 12 to slide in the axial direction is fitted into a hole 11b in the center of the socket base 11, and is integrally coupled. The socket outer shaft 54 is formed in a hollow cylindrical shape. A flange 54a is formed on the outer peripheral surface of the socket outer shaft 54, and the socket outer shaft 54 is fitted into the hole 11b of the socket base 11 until the flange 54a abuts against the socket base 11. The inner cover 56 is coupled to the bearing outer shaft 54 from the back side of the bearing base 11. The inner lid 56 is provided to support a coil spring 57 as an elastic body. A support rod 56a inserted into the center of the retainer spring 57 to support the retainer spring 57 is formed in the inner lid 56.

The bearing shaft 55 is embedded in the bearing outer shaft 54. The holder shaft 55 is formed in a substantially cylindrical shape with a closed front end. A cylindrical small-diameter portion as a stepped portion is formed at the tip end portion of the catch shaft 55. The holder shaft 55 includes a main body 55b slidably supported by the holder outer shaft 54, and a small-diameter portion 55a concentric with the main body 55b and having a smaller diameter than the main body 55 b. The small-diameter portion 55a and the main body portion 55b form a step at the tip end portion of the retainer shaft 55. The retainer spring 57 is inserted into the body portion 55b of the retainer shaft 55. The retainer spring 57 is interposed between the retainer shaft 55 and the inner cap 56, and it is intended that the retainer shaft 55 protrude from the retainer outer shaft 54. The retainer shaft 55 is projected from the retainer outer shaft 54 until the flange 55c of the retainer shaft 55 abuts against the step of the inner peripheral surface of the retainer outer shaft 54. Of course, the retainer shaft 55 can also be pressed into the retainer outer shaft 54 against the spring force of the retainer spring 57.

As shown in fig. 13(a), in order to prevent the door d from being swung when the door d is closed, even if the door d abuts against the frame f, the arm 4 of the door opening/closing device 1 grips the holder shaft 12 and applies a force in a closing direction to the door d. That is, in the closed state of the door d, the arm 4 itself does not rotate completely to the closed state, but is rotated at a rotation angle close to the closed state, and a space for rotating in the closing direction is maintained.

When the open pull arm 4 is erroneously set to the closed state by a mistake such as a disturbance by a stranger, the pull arm 4 is completely rotated to the closed state. At this time, even if the door d is put in the restored state where the holder shaft 12 is fitted into the groove 48a of the arm 4 in order to close the door d, the holder shaft 12 cannot be fitted into the groove 48a of the arm 4. As shown in fig. 30(b), by forming the small-diameter portion 55a at the tip end portion of the catch shaft 12, even when the pull arm 4 is completely rotated to the closed state, the small-diameter portion 55a can be fitted into the groove 48a of the pull arm 4 by a difference in the diameters of the main body portion 55b and the small-diameter portion 55 a. If the small diameter portion 55a of the catch shaft 12 can be engaged with the groove 38a of the arm 4, the arm 4 can be rotated to the open state, and the catch shaft 12 can be engaged with the groove 48a of the arm 4 in use, so that the door opening and closing device 1 can be used as usual. Since the outer peripheral surface of the small-diameter portion 55a is formed in a cylindrical shape, not in a conical shape, the small-diameter portion 55a fitted into the groove 48a of the pull arm 4 is not retracted into the holder outer shaft 54 and separated from the groove 48 a.

Fig. 14 and 15 show other examples of the socket. The retainer 71 of this embodiment is also composed of a retainer base 11, a retainer outer shaft 54, a retainer shaft 12, a coil spring 57, and an inner lid 56. The socket shaft 12 is assembled into the socket outer shaft 54 slidably in the axial direction. The configurations of the retainer outer shaft 54, the retainer shaft 12, the coil spring 57, and the inner cap 56 are the same as those of the retainer shown in fig. 11 and 12, and therefore, the same reference numerals are used to omit descriptions thereof.

In the retainer of this example, the four mounting holes 11a of the retainer base 11 are formed as long holes. This is to adjust the position of the socket shaft 12 relative to the frame f. The position of the socket shaft 12 is adjusted in such a way: even if the arm 4 is completely rotated to the closed state, the small diameter portion 55a of the retainer shaft 12 can be fitted into the groove 48a of the arm 4 without fail.

Figures 16 and 17 show a further example of a socket. The retainer shaft 73 of the retainer 72 of this example is different in structure from the retainer 8 shown in fig. 11 and 12. The configurations of the retainer base 11, the retainer outer shaft 54, the coil spring 57, and the inner cap 56 are the same as those of the retainer 8 shown in fig. 11 and 12, and therefore, the same reference numerals are used to omit descriptions thereof. In the retainer 72 of this example, the tip of the cylindrical body portion 73b of the retainer shaft 73 is cut to form a semi-cylindrical stepped portion 73 a. In the retainer 8 shown in fig. 11 and 12, steps are provided around the periphery of the retainer shaft 12, but steps may be provided only in the half periphery of the retainer shaft 73 as shown in this example. However, structure is required to prevent the bearing shaft 73 from rotating relative to the bearing outer shaft 54.

The present invention is not limited to the embodiment described above, and various modifications may be made without departing from the scope of the present invention.

For example, the door opening and closing system according to the present invention is not limited to the door of a building, and may be used to assist the opening and closing of a sliding door of a building, a door of furniture, a sliding door, and a drawer. The cross sections of the body portion and the small-diameter portion of the bearing shaft are not limited to circular, and may be polygonal such as a square.

The present specification is based on application No. 2009-191100, filed on 8/20/2009, which is incorporated herein in its entirety.

Description of the symbols

1 … door and window opening and closing device

4 … draw arm

5 … arm shaft (arm shaft)

8, 71, 72 … socket

11 … socket base

11a … long hole

12, 73 … socket shaft

55a … Small-diameter part (step part)

55b, 73b … body part

57 … spiral spring (elastomer)

73a … step

Claims (5)

1. A door and window opening and closing system comprises a bearing seat mounted on one of a door and a window or a frame, and a door and window opening and closing device mounted on the other of the door and the window or the frame and provided with a pull arm matched with the bearing seat; when the door and window is closed, the draw arm of the door and window opening and closing device is matched with the bearing seat, and the draw arm rotates by taking the arm shaft as a center to apply force towards the closing direction to the door and window; it is characterized in that the preparation method is characterized in that,

the retainer includes a retainer base attached to either the door or the window or the frame, and a retainer shaft assembled to the retainer base to be slidable in an axial direction and engaged with the arm;

the bearing shaft has a main body part which can be matched with the pull arm and a cylindrical, semi-cylindrical or polygonal cylindrical step part which is arranged at the front end of the main body part and can be matched with the pull arm;

the step portion of the socket shaft is engaged with the pull arm in a state where the pull arm is further rotated in a closing direction from a state where the body portion of the socket shaft is engageable with the pull arm.

2. The door opening and closing system as claimed in claim 1, wherein a step is provided around the circumference of said holder shaft.

3. The door opening and closing system according to claim 1 or 2, wherein said catch base is formed with an elongated hole to enable adjustment of the mounting position of said catch base with respect to the door or window or the frame.

4. A door and window opening and closing system comprises a bearing seat mounted on one of a door and a window or a frame, and a door and window opening and closing device mounted on the other of the door and the window or the frame and provided with a pull arm matched with the bearing seat; when the door and window is closed, the draw arm of the door and window opening and closing device is matched with the bearing seat, and the draw arm rotates by taking the arm shaft as a center to apply force towards the closing direction to the door and window; it is characterized in that the preparation method is characterized in that,

the retainer includes a retainer base attached to either the door or the window or the frame, and a retainer shaft assembled to the retainer base to be slidable in an axial direction and engaged with the arm;

the bearing shaft has a main body part which can be matched with the pull arm and a cylindrical, semi-cylindrical or polygonal cylindrical step part which is arranged at the front end of the main body part and can be matched with the pull arm;

and steps are arranged around the bearing seat shaft.

5. A bearing for a door/window opening/closing system, which applies a force in a closing direction to a door/window when the door/window is closed; it is characterized in that the preparation method is characterized in that,

the retainer includes a retainer base attached to one of the door and window or the frame, and a retainer shaft assembled to the retainer base so as to be slidable in the axial direction and engaged with a pull arm attached to the other of the door and window or the frame;

the bearing shaft has a main body part which can be matched with the pull arm and a cylindrical, semi-cylindrical or polygonal cylindrical step part which is arranged at the front end of the main body part and can be matched with the pull arm;

and steps are arranged around the bearing seat shaft.