Door closer
First Claim
1. A door closer, comprising:
- a closer that includesa pinion that rotates in the forward and reverse directions together due to the opening and closing, respectively, of a door,a cylinder that is meshed with the pinion and moves forward and backward, anda closing spring that, via the cylinder and the pinion, provides force that is used to close the door, andan opening-assistance device that includesan opening spring that stores a door-opening force due to the rotation of said pinion when the door is opened,a locking mechanism that locks the opening spring in the opening-force-storing condition when the door is opened, andan unlocking mechanism that unlocks the locking mechanism when the door is closed, andwherein said closer and said opening-assistance device are inside a same case so that the functioning of said closer and that of said opening-assistance device are interlinked when the door is opened, andwherein said opening-assistance device comprisessaid opening spring,said locking mechanism,said unlocking mechanism,a fixing member that extends along the moving direction of said cylinder under a fixed condition at one end of said case, anda moving member that receives the force of said opening spring, that can make contact with said cylinder, and that moves along the fixing member due to the moving force between itself and the cylinder, andwherein said locking mechanism has locking balls that lock the movement of the moving member when the door is opened and lock the opening spring in an opening-force-storing condition, anddue to the closing of the door, said moving member releases the locking balls'"'"' locking of the movement of the moving member.
1 Assignment
0 Petitions
Accused Products
Abstract
A door closer that integrally incorporates a door-opening-assistance device, and that therefore eliminates the need for unnecessary troublesome adjustment between parts, and whose number of parts is reduced, making said door closer compact. The door closer 1 includes a closer 1a that includes a pinion 5 that rotates in the forward and reverse directions when the door is opened or closed, respectively. A cylinder 9 is meshed with the pinion 5 and moves forward and backward. A closing spring 14 energizes the door in the closing direction via the cylinder 9 and the pinion 5. A opening-assistance device 1b that includes an opening spring 22 that stores an opening force in the door-opening direction due to the movement of the cylinder 9 when the door is opened. Locking mechanisms 27, 28, and 29, that—when the door is opened—lock the opening spring 22 under an opening-force-storing condition. An unlocking mechanisms 23 and 24 that—when the door is closed—unlock the locking mechanisms. The closer 1a and the door-opening-assistance device 1b are inside the same case 6 and interlinked by the opening of the door.
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Citations
11 Claims
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1. A door closer, comprising:
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a closer that includes a pinion that rotates in the forward and reverse directions together due to the opening and closing, respectively, of a door, a cylinder that is meshed with the pinion and moves forward and backward, and a closing spring that, via the cylinder and the pinion, provides force that is used to close the door, and an opening-assistance device that includes an opening spring that stores a door-opening force due to the rotation of said pinion when the door is opened, a locking mechanism that locks the opening spring in the opening-force-storing condition when the door is opened, and an unlocking mechanism that unlocks the locking mechanism when the door is closed, and wherein said closer and said opening-assistance device are inside a same case so that the functioning of said closer and that of said opening-assistance device are interlinked when the door is opened, and wherein said opening-assistance device comprises said opening spring, said locking mechanism, said unlocking mechanism, a fixing member that extends along the moving direction of said cylinder under a fixed condition at one end of said case, and a moving member that receives the force of said opening spring, that can make contact with said cylinder, and that moves along the fixing member due to the moving force between itself and the cylinder, and wherein said locking mechanism has locking balls that lock the movement of the moving member when the door is opened and lock the opening spring in an opening-force-storing condition, and due to the closing of the door, said moving member releases the locking balls'"'"' locking of the movement of the moving member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification