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door closer

A technology of door closers and oil chambers, which is applied in the field of door closers with three-stage opening and closing speed adjustment functions, can solve problems such as starting work, and achieve the effect of preventing external leakage

Active Publication Date: 2016-08-17
RYOBI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, if the air flowing out of the first oil chamber moves to the second oil chamber through the oil passage hole due to the collapse of the expansion absorbing member, the predetermined door opening angle at which the three-stage opening and closing speed adjustment force starts to work changes, causing the The problem that the three-stage opening and closing speed adjustment force starts to work at an angle smaller than the set angle

Method used

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Embodiment Construction

[0077] Hereinafter, preferred embodiments for carrying out the present invention will be described using the drawings.

[0078] The door closer according to the first embodiment of the present invention is, for example, fixedly installed above the door and connected to an arm provided on the side of the door frame, whereby the door closing force and the three-stage opening and closing speed adjustment force for the door can be adjusted. Work. Therefore, using Figure 1 ~ Figure 4 Next, the basic structure of the door closer according to this embodiment will be described. here, figure 1 It is a cross-sectional view of the door closer according to this embodiment, figure 2 It is a left side view of the door closer which concerns on this embodiment. in addition, image 3 yes figure 2 In the V-V cross-sectional view in , for the convenience of explanation, components such as pistons are partially omitted. in addition, Figure 4 The sponge rubber of this embodiment is shown...

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Abstract

The invention provides a door closer. When the expansion absorption member is used, the door opening angle cannot be changed by adopting three-segment opening / closing speed adjusting force. The door closer (1) is provided with a control mechanism part (17), which can be used to adjust the moving speed of a piston (4) by adjusting the moving oil mass of the working oil between a first oil chamber (3a) and a second oil chamber (3b) and can carry out the reciprocating motion of the piston (4), and therefore the door opening speed can be controlled. The piston (4) is connected with a hollow member (8) in a spring (5). The hollow member (8) is provided with a hollow part (8a) communicated with the first oil chamber (3a) and the second oil chamber (3b), a check valve (8A) capable of preventing the working oil flowing from the first oil chamber (3a) to the hollow part (8a), and a foamed rubber (10) accommodated in the hollow part (8a).

Description

technical field [0001] The present invention relates to an improvement of a door closer (door self-closing device) that slowly and automatically closes an opened door, and in particular relates to a door closer with a three-stage opening and closing speed adjustment (back check) function. Background technique [0002] In general, a door closer includes a housing having a closed space (oil chamber) filled with operating oil, and a reciprocating piston biased by a spring is arranged in the closed space of the housing. In addition, a rack and pinion mechanism is assembled to the piston, and the pinion of the rack and pinion mechanism is connected to the rotation shaft so that the rotation shaft is inserted into the upper and lower housings. In addition, one end of the link mechanism is connected to the upper end of the rotating shaft, and the other end of the link mechanism is connected to the upper frame side of the door opening of the building. [0003] Then, when the door i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E05F3/10E05F3/12
Inventor 安倍俊太郎高森龙太朗
Owner RYOBI