Automatic door stopping-closing device and door

Abstract

An automatic door stopping-closing device comprises a cylinder with a connecting rod, one end of which is connected to a door; a bracket assembly on the door frame, comprising a hook connected with the other end of the rod, a movable lug cooperated with the hook, and a pull rod cooperated with the movable lug, wherein the pull rod and the hook can be engaged or disengaged. After the door is opened, the door can be kept open securely through the cooperation between the hook and the movable lug; and the door can be closed automatically by a slight push, through the cooperation between two of the hook, the movable lug and the pull rod. The automatic door stopping-closing device holds the door open without external force after the door is opened, and closes the door automatically after a slight push.

Claims

1. A door closer device for controlling closing of a door mounted in a door frame, comprising: a cylinder pivotally mounted to the door; a bracket fixed to the door frame; a rod with a first end in the cylinder and a second end pivotally connected to the bracket, and the connecting rod being extendable and retractable relative to the cylinder; a lug pivotally mounted in the bracket for rotation between a first position engaging the rod to hold the door open and a second position disengaged from the rod to allow the door to close; the lug being biased to the first position when the door is closed and being rotatable in opposite directions from the first position; and the lug is in the first position when the door is closed and when the door is held open.

2. The door closer device of claim 1 further comprising a spring in the bracket to bias the lug between the first and second positions.

3. The door closer device of claim 1 wherein the lug pivots in a first direction to engage the rod and pivots in an opposite second direction to disengage the connecting rod.

4. The door closer device of claim 1 further comprising a pull rod in the bracket slidable in one direction by the lug and slidable in an opposite direction by the second end of the connecting rod.

5. The door closer device of claim 1 wherein the cylinder is pneumatic.

6. The door closer device of claim 1 wherein the cylinder is hydraulic.

7. The door closer device of claim 1 further comprising a slide member in the bracket slidable between a first position disengaged from the rod when the lug holds the door open and a second position to rotate the lug to its second position.

8. The door closer device of claim 7 wherein the slide member is moved to its second position by the rod.

9. The door closer device of claim 7 wherein the slide member is moved to its first position by the lug.

10. A method of controlling positions of a hinged door, comprising: extending a rod of a cylinder mounted to the door as the door opens; then engaging a lug in a bracket on a frame surrounding the door with an end of the extended rod to hold the door open at a first distance without external force; opening the door a further distance so as to disengage the rod from the lug; upon release of the door from the further distance, retracting the rod to close the door; wherein the lug rotates in a first direction from an initial position when the door moves towards the first distance and rotates in an opposite direction from the initial position when the door moves to the further distance; and the lug is in the initial position when the door is closed and when the door is held open.

11. The method of claim 10 further comprising rotating the lug out of engagement with the rod when the door is opened to the further distance.

12. The method of claim 11 further comprising sliding a member in the bracket when the door is opened to the further distance to rotate the lug out of engagement with the rod.

13. The method of claim 10 further comprising biasing the lug between rod engaging and disengaging positions.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is further illustrated with reference to accompanying figures.

(2) FIG. 1 is an assembly plan view of an automatic door-stopping and closing device of an embodiment of the invention when the door is closed.

(3) FIG. 2 is a perspective view of an automatic door stopping and closing device of an embodiment of the invention.

(4) FIG. 3 is an exploded view of the bracket assembly of an automatic door stopping and closing device of an embodiment of the invention.

(5) FIG. 4 is a traverse sectional view of the bracket assembly of an automatic door stopping and closing device of an embodiment of the invention.

(6) FIG. 5 is a longitudinal sectional view of the bracket assembly of an automatic door stopping and closing device of an embodiment of the invention.

(7) FIG. 6 is an enlarged sectional view from FIG. 5 of the dowel pin of an automatic door stopping and closing device of an embodiment of the invention.

(8) FIG. 7 is a transverse sectional view of the bracket assembly of an automatic door stopping and closing device of an embodiment of the invention when the door is closed.

(9) FIG. 8 is a transverse sectional of the bracket assembly of an automatic door stopping and closing device of an embodiment of the invention when the door is opening;

(10) FIG. 9 is a transverse sectional view of the bracket assembly of an automatic door stopping and closing device of an embodiment of the invention when the door is stopped in a hold open position.

(11) FIG. 10 is an assembly diagram of an automatic door stopping and closing device of an embodiment of the invention when the door is stopped.

(12) FIG. 11 is a transverse sectional view of the bracket assembly of an automatic door stopping and closing device of an embodiment of the invention in Step 1 of door closing.

(13) FIG. 12 is a transverse sectional view of the bracket assembly of an automatic door stopping and closing device of an embodiment of the invention in Step 2 of door closing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(14) In order to fully understand the purposes, features and effects of the invention, the designs, specific structures and the achieved effects of the invention are further explained with reference to the accompanying figures.

(15) As shown in FIGS. 1, 2 and 3, the automatic door stopping and closing device of this embodiment comprises a cylinder 10 with an extendible and retractable connecting rod 1, one end of which is connected to a door 11; and bracket assembly 2 which is configured on a door frame 12 and comprises a hook 230 connected with the other end of the connecting rod 1, a movable lug 240 cooperated with the hook 230, a pull rod 220 cooperated with the movable lug 240, wherein the pull rod 220 and the hook 230 can be separated or connected. The cylinder 10 and rod assembly may be hydraulic or pneumatic.

(16) When the door is opening, the connecting rod 1 drives the hook 230 to move clockwise under external force, thereby the hook 230 comes in contact with the movable lug 240 and drives the movable lug 240 to rotate counterclockwise, as shown in FIGS. 7 and 8. When the movable lug 240 rotates to its limit position, the external force will disappear. Then the movable lug 240 will rotate clockwise to its stop position (FIG. 9) under a first reset force, whereby the hook 230 is locked by the movable lug 240, and the door is stopped and held open in a lockout condition.

(17) In order to close the door from the hold-open position, the door is opened slightly further, such that the connecting rod 1 drives the hook 230 to further move clockwise under external force, whereby the hook 230 comes in contact with the pull rod 220 and drives the pull rod 220 to slide leftwards, as shown in FIG. 11. Further, the pull rod 220 drives the movable lug 240 to rotate clockwise, thereby the movable lug 240 and the hook 230 are disengaged from each other and are unlocked. After the movable lug 240 and the hook 230 are unlocked, the external force will disappear, and then the connecting rod 1 drives the hook 230 to rotate counterclockwise under a door-closing force, making the hook 230 come in contact with the movable lug 240 and further drive the movable lug 240 to rotate clockwise until the hook 230 and the movable lug 240 are spaced apart from each other. After the hook 230 and the movable lug 240 are separated (FIG. 11), the hook 230 can rotate counterclockwise under the door-closing force (FIG. 12), and the movable lug 240 rotates counterclockwise to its initial position under a second reset force.

(18) The first reset force and the second reset force are in opposite directions.

(19) As shown in FIGS. 4, 5 and 6, the hook 230 is configured with a first hook tooth 231 cooperated with the movable lug 240 and a second hook tooth 232 cooperated with the pull rod 220. The movable lug 240 is configured with a first lug tooth 241 cooperated with the hook 230 and a second lug tooth 242 cooperated with the pull rod 220. A torsional spring 243 is configured in the movable lug 240, and the first reset force and the second reset force are the reset force of the torsional spring 243. The pull rod 220 is configured with a first protrusion 221 cooperated with the movable lug 240 and a second protrusion 222 cooperated with the hook 230. The pull rod 220 is in a long strip shape, and the first protrusion 221 and the second protrusion 222 are configured at the two ends of the pull rod 220 respectively.

(20) The bracket assembly 2 also comprises a housing 210, and the hook 230, the movable lug 240 and the pull rod 220 are located therein. A dowel pin 250 is configured in the hook 230 and a dowel pin hole 211 matched with the dowel pin 250 is configured in the housing 210. The dowel pin 250 comprises a fixing ring 253, a pin body 252 configured in the fixing ring 253 and a spring 251 configured in the pin body 252. When the movable lug 240 rotates to its limit position, the dowel pin body 252 sets into the dowel pin hole 211 (FIG. 6).

(21) The housing 210 is preferably configured with an espagnolette 9 which extends through the housing for fastening.

(22) The connecting rod 1 is preferably connected with the door by a hinge 3.

(23) The bracket assembly 2 preferably comprises an extension sheet 4 where a number of screw holes 410 are provided. The screw holes 410 are configured to be fixed to the door frame in cooperation with self-tapping screws 5.

(24) The automatic door stopping-closing device of the embodiment operates as follows.

(25) FIG. 1 and FIG. 7 shows the automatic door stopping-closing device of the embodiment when the door 11 is closed wherein the hook 230 and the movable lug 240 are apart from each other and the movable lug 240 is in its initial position.

(26) FIG. 8 shows the automatic door stopping-closing device of the embodiment when the door 11 is opening, wherein the connecting rod 1 rotates in a direction indicated by the arrow shown in the figure, and the connecting rod 1 drives the hook 230 of the bracket assembly 2 to move clockwise, whereby the first hook tooth 231 comes in contact with the first lug tooth 241, and further drives the movable lug 240 to rotate counterclockwise until the movable lug 240 rotates to its limit position. Meanwhile, as shown in FIG. 6, the pin body 252 of the dowel pin 250 will be pressed into the dowel pin hole 211 by the spring 251 and cause a sound which remind the user to stop pushing the door. As shown in FIG. 9, the movable lug 240 in its limit position is driven by the first reset force offered by the torsional spring 243 and rotates clockwise to its stop position, whereby the first hook tooth 231 of the hook 230 will be locked as the first lug tooth 241 of the movable lug 240 bears against it, thus a function of stopping and holding the door open is achieved.

(27) As shown in FIG. 10 and FIG. 11, when the door is further pushed to its limit after the door is stopped, in the automatic door stopping-closing device of the embodiment, the connecting rod 1 rotates and drives the hook 230 to rotate, thereby the second hook tooth 232 of the hook 230 comes in contact with the second protrusion 222 of the pull rod 220, and further drives the pull rod 220 to slide in a direction indicated by the arrow shown in the figure. The first protrusion 221 of the pull rod 220 comes in contact with the second lug tooth 242 of the movable lug 240 and further drives the movable lug 240 to rotate counterclockwise, whereby the hook 230 and the movable lug 240 are moved apart from each other and unlocked. Step 1 of door closing is completed.

(28) As shown in FIG. 12, the door 11 will be closed automatically when the user no longer pushes the door. The connecting rod 1 rotates and drives the hook 230 to rotate counterclockwise, thereby the first hook tooth 231 comes in contact with the first lug tooth 241 and further drives the movable lug 240 to rotate clockwise as indicated by the arrow in the figure until the hook 230 and the movable lug 240 are moved apart from each other. At that moment, the movable lug 240 rotates counterclockwise to its initial position under the second reset force offered by the torsional spring 243. Meanwhile, as the hook 230 rotates counterclockwise to a position where the hook 230 is located when the door is closed, the spring 251 of the dowel pin 250 returns and the pin body 252 leaves the dowel pin hole 211. Step 2 of door closing is completed. At that time, the bracket assembly 2 has a same inner structure with FIG. 7, and the function of closing a door automatically when the door is open is achieved.

(29) The above contents illustrate a completed working cycle of stopping and closing the door for the automatic door stopping-closing device of the present embodiment. The automatic door stopping-closing device enables a stable and effective automatic door stopping-closing.

(30) Those described above are just some preferred embodiments of the invention, instead of any formal restrictions of the invention. Therefore, any simple amendments, equivalent variants and modifications to above embodiments according to the technical essence of the present invention, without departing from the technical solution of the present invention, still fall in the technical scope of the technical solution of the present invention.