Auxiliary door-opening apparatus

Abstract

A door opening assisting device that has a simple structure not requiring a dedicated operation member for assisting opening of a door and whose operability and reliability when it operates in synchronous with door opening operation are enhanced. The door opening assisting device is constructed as follows. With opening and closing of the door, a passive member (20) connected to a door closer for rotatingly urging the door in the closing direction is rotated in the normal and reverse direction, and the rotation of the door closer causes transmission members (30, 31) to reciprocate in the direction corresponding to the opening and closing of the door.; In this process, the opening of the door causes an opening spring (51) to urge and move the transmission member (30) in the door opening direction, and after opening force is accumulated in the spring (51) by the movement of the transmission member (31), the spring (51) is locked with the opening force accumulated in it. In the construction above, when the passive member is rotated in a predetermined angle region in the initial stage of door opening operation, this causes the opening spring to exert opening force and also causes the spring to accumulate opening force and then to be locked with the opening force accumulated in it.

Description

technical field [0001] The present invention relates to an auxiliary door opening device which assists the operation force of opening a door and facilitates door opening. Background technique [0002] At present, in buildings with high airtightness such as apartments and buildings, a large force is required to open and close the door, which is a large burden for children and the elderly. Therefore, an auxiliary door opening device that assists in opening the door has been used. [0003] The structure of the existing auxiliary door opening device is: usually constituted separately from the door closer, and the power assist mechanism that assists when opening the door is installed on the door or the wall supporting the door, and the handle (or handle) used to open the door is rotated Operation, the power assist mechanism works, thereby reducing the force when opening the door (for example, refer to Patent Document 1). [0004] On the other hand, a door closer is disclosed in...

AI Technical Summary

Problems solved by technology

However, since the auxiliary door opening mechanism directly connected to the door closer mechanism is configured to detect the rotation angle of the main shaft through the encoder installed on the main shaft during the door opening action, receive the signal, and make the motor, gear, auxiliary shaft, The second driving part consisting of a pinion and the like rotates to move the auxiliary piston in the direction of closing the door, so a complex structure and control system are required, resulting in a large-scale device and an increase in cost

Moreover, since a power supply is required separately, when there is a power failure or an abnormal power supply, not only the auxiliary door opening mechanism does not work, but also produces a resistance force in the opposite direction of opening and closing the door, which has problems such as obstruction.

In addition, until the door is fully closed, the second driving part of the above-mentioned auxiliary door opening mechanism continues to rotate so as not to generate resistance to the driving force in the door closing direction of the door closer, so it is necessary to continuously maintain the operation of controlling the movement of the auxiliary piston in the door closing direction, thereby becoming complicated

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