Door check assembly
A door check assembly comprises a guide block and a one-piece or multi-piece elongate linkage having a range of travel back-and-forth through the guide block between a first position and a second position corresponding to open and closed positions, respectively, of a door assembly incorporating the door check assembly. A locking pin or other check-lock member is mounted in the guide block for movement between a locking position and an unlocking position. A check-lock actuator, e.g., hand-operated, electric, etc., is operatively connected via linkage directly or indirectly (i.e., alone or in combination with other link members) connecting the check-lock actuator to the check-lock member. The check-lock actuator is mounted in a door at a position, e.g., remote from the check-lock in order to be more convenient for the user. The check-lock actuator is operative via the linkage member to move the check-lock member between the locking position and the unlocking position. In the locking position the check-lock member, e.g., a locking pin, forms a positive locking engagement with the elongate linkage, which engagement is operative to prevent travel of the elongate linkage through the guide block and so, to prevent unintended closing of the door.
1 . A door check assembly comprising, in combination:
a guide block;
an elongate linkage having a range of travel through the guide block between a first position and a second position corresponding to open and closed positions, respectively, of a door assembly;
a check-lock member mounted in the guide block for movement between
a locking position in which it forms a positive locking engagement of the elongate linkage operative to prevent travel of the elongate linkage through the check body from the first position to the second position, and
an unlocking position in which it does prevent travel of the elongate linkage through the check body from the first position to the second position;
a check-lock actuator; and
a linkage member connecting the check-lock actuator to the check-lock member, wherein the check-lock actuator is operative via the linkage member to move the check-lock member between the locking position and the unlocking position.
2 . The door check assembly of claim 1 wherein the check-lock member is a lock-pin mounted for axial movement in the guide block, and wherein the lock-pin
in the locking position is in a hole in the elongate linkage, and
in the unlocking position is clear of the hole in the elongate link.
3 . The door check assembly of claim 2 wherein the check-lock actuator is a slide-bar switch and the linkage member is a Bowden cable extending from the slide-bar switch to the guide block.
4 . The door check assembly of claim 3 further comprising a lock-pin spring mounted in the guide block and operative to bias the lock-pin toward the locking position.
5 . The door check assembly of claim 3 wherein the slide-bar switch is operative to hold the lock-pin in the unlocking position against the bias of the lock-pin spring mounted in the guide block.
6 . The door check assembly of claim 2 wherein there are multiple holes longitudinally spaced in the elongate linkage to receive the lock-pin in the locking position, corresponding to different open positions of a door assembly incorporating the door check assembly.
7 . The door check assembly of claim 1 further comprising a check body, the elongate linkage having a range of travel through the check body between the first position and the second position.
8 . The door check assembly of claim 7 wherein the elongate linkage is operative to travel linearly through the guide block and check body between the first position and the second position.
9 . The door check assembly of claim 7 further comprising at least one roller mounted in the check body and biased by a roller spring mounted in the check body into contact with the elongate linkage, wherein the elongate linkage has a detent portion and a raised portion, and wherein the roller is operative to roll over the raised portion to the detent portion as the elongate linkage travels through the check body toward the a first position, the roller in the detent portion being operative to provide resistance to the elongate linkage traveling through the check body to the a second position.
10 . A door assembly comprising, in combination:
a door frame defining a door opening;
a door pivotably mounted in the door opening for movement about a pivot axis between a closed position and an open position; and
a door check assembly integral with the door frame, the door check assembly comprising, in combination:
a guide block;
an elongate linkage having a range of travel through the guide block between a first position and a second position corresponding to open and closed positions, respectively, of the door;
a check-lock member mounted in the guide block for movement between
a locking position in which it forms a positive locking engagement of the elongate linkage operative to prevent travel of the elongate linkage through the check body from the first position to the second position, and
an unlocking position in which it does prevent travel of the elongate linkage through the check body from the first position to the second position;
a check-lock actuator; and
a linkage member connecting the check-lock actuator to the check-lock member, wherein the check-lock actuator is operative via the linkage member to move the check-lock member between the locking position and the unlocking position.
11 . The door assembly of claim 10 further comprising:
a check body, the elongate linkage having a range of travel through the check body corresponding to the range of travel of the elongate linkage between the first position and the second position; and
a passive check member mounted in the check body.
12 . The door assembly of claim 11 further comprising a biasing member mounted in the check body and operative to bias the passive check member into contact with the elongate linkage in the check body.
13 . The door assembly of claim 12 wherein the elongate linkage forms a detent to receive the passive check member.
14 . The door assembly of claim 10 wherein the check-lock actuator is positioned in the door remote from the check-lock member.
15 . The door assembly of claim 10 wherein
the door has a pivot side proximate the pivot axis and a latch side opposite the pivot side,
the guide block is mounted proximate the pivot axis side of the door, and
the check-lock actuator is positioned at the latch side of the door.