JPH0245749B2 - DOAKUROOZA - Google Patents

Description

[Detailed description of the invention] The present invention relates to a door closer.

Conventionally, in the case of the above-mentioned door closer, an internal door closer is used which performs normal door opening operation up to an arbitrary angular range within a predetermined angular range, and applies friction in the remaining angular range so that it can be stopped at a desired position. Top door closers and door closers that perform only normal door opening/closing operations and do not have a stop function are only known separately.

Therefore, depending on the place of use and purpose of use, there may be cases where you want the door to stop in the open position, or where you do not want it to stop. The inconvenience was inevitable.

Therefore, the present invention has been developed as a result of various studies in view of the above-mentioned conventional circumstances.The purpose of the present invention is to provide a door closer with both internal stop function and non-stop function in one unit. Moreover, it is possible to easily switch between with and without a stop at the finished product stage.

The present invention will be described in detail below based on an illustrated embodiment. As shown in FIGS. 1 to 6, a cylinder 3 formed by closing both ends of a housing 1 with end plugs 2, 2, A stop 4 is installed inside the door, and the piston 4 is always urged in the direction of closing the door by using both the elastic force of a spring 5 and the pressure of filling oil.

Rack teeth 6 carved on one side of the outer periphery of the piston 4 mesh with a pinion 8 which is pivotally supported in a chamber 7 provided in the housing 1 and is connected to an arm (not shown) attached to a door frame (not shown). The above-mentioned rack teeth 6, which are provided to match a predetermined door opening angle range (for example, 160°), have a length corresponding to the initial arbitrary angle range, and the portion corresponding to the remaining angle range is made into the missing tooth portion 9. It has been formed.

On the other hand, at symmetrical positions on the outer circumference of the pinion 8, there are carved teeth each having a length corresponding to the length of the above-mentioned rack teeth 6, and which engage frictionally with the above-mentioned rack teeth 6 at the pinion teeth 10 and the distal ends of the pinion teeth 10. A stop mechanism section 12 consisting of an outer circumferential surface 11 as a stop mechanism that does not stop.
A non-stop section 14 consisting only of pinion teeth 13 is provided, and the stop mechanism section 1
2 and the no-stop section 14 are provided a toothless portion 15 for changing from with a stop to no stop, and a toothless portion 16 for changing from no stop to a stop.

Further, in the tooth width direction of the terminal teeth 17 of the rack teeth 6 and the outer circumferential surface 11 in the stop mechanism section 12, there is a relief part 18 for the stop mechanism, that is, the outer circumferential surface 11, and a relief part 18 for the stop mechanism, that is, for the outer circumferential surface 11, and a part without a stop, that is, for the rack. Relief portions 19 for the relief portions 18 of the end teeth 17 are cut out and have a width of approximately 1/2+α of the tooth width. This is provided because when a stop is provided, a missing tooth portion of the rack tooth 6 is required, and when a stop is not provided, a rack tooth is required.

Further, a relief portion 20 is provided in the second tooth 6a from the front end of the rack teeth 6 so that the pinion teeth 10 of the stop mechanism section 12 of the pinion 8 can easily mesh with the pinion teeth 13 of the non-stop section 14. It's good to leave it there.

In the above configuration, when the door starts to open from the closed state shown in FIG. B engages with the rack teeth 6, the piston 4 moves forward and the spring 5 is compressed. When the door opening force is released, the door will automatically close due to the elastic force of the spring 5 until just before one point on the outer circumferential surface 11 of the stop mechanism section 12 of the pinion 8 contacts the point A of the rack tooth 6, but after that point A point on the outer circumferential surface 11 and the rack teeth 6 are frictionally engaged as shown in FIG. 7, so that the piston 4 remains stationary and the door is stopped and held in its open position. In other words, there is a stop.

In the above-mentioned stopped state, if a closing force exceeding the frictional engagement force is applied, the above-mentioned frictional engagement is released, and the door is then automatically closed.

Next, when there is no stop, the link between the arm (not shown) and the pinion 8 is released, and the pinion 8 is moved to the seventh position.
When rotated further counterclockwise from the state shown in the figure,
The pinion 8 is released from frictional engagement with the point A of the rack 6, and as shown in FIG.
2, the piston 4 rotates to a relief section 19 for changing from with a stop to without a stop, that is, a toothless portion 15, and the piston 4 returns to the door closing direction due to the elastic force of the spring 5. In other words, the stop mechanism is released.

Next, when the pinion 8 is further rotated counterclockwise from the above-mentioned state, meshing between the pinion teeth C of the pinion teeth 13 in the no-stop section 14 and the rack teeth 6 starts as shown in FIG. 9, and no stop occurs.

When the door is closed in the state shown in Fig. 9, an arm (not shown) and the pinion are connected, and the door is opened, the pinion 8 is further rotated counterclockwise, and the pinion teeth 13 of the non-stop section 14 and the rack teeth 6 are engaged. The piston 4 moves to open the door, but when the door opening force is released at this time, the piston 4 returns to its original position due to the spring force, so the door is automatically closed.

Next, when changing from the above-mentioned no stop to the stop, as in the above case, the link between the arm (not shown) and the pinion 8 is released, and the pinion 8 is moved to the 10th stop.
When rotated as shown in the figure, the meshing between the pinion teeth 13 and the rack teeth 6 is released as shown in the figure due to the lack of a stop, that is, the toothless part 16.
The piston 4 returns to its original position and becomes the state shown in FIG. 1, with the stop being present.

Since the present invention is constructed and operates as described above, it has both internal stop and no-stop functions in one unit, so it can be used freely for holding the door open or not holding the door open. It is very convenient to change from with a stop to without a stop, or vice versa, by simply rotating the pinion 8 without adding or adjusting any other special parts. Furthermore, similar to the conventional internal stop door closer, the piston 4 has a rack tooth 6 and a pinion 8.
It can be manufactured at a low cost because it has an extremely simple structure.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view showing the closed door state with a stop in the door closer according to the present invention, and FIG.
The figure is a bottom view showing the rack tooth portion of the piston in the door closer, Figure 3 is a cross-sectional view taken along the line - - in Figure 2, Figure 4 is an enlarged sectional view of the rack tooth portion in the door closer, and Figure 5 is the same. FIG. 6 is a front view showing the pinion of the door closer, FIG. 6 is a side view of the pinion, and FIGS. 7 to 10 are explanatory views showing the operating states of the door closer. 4... Piston, 6... Rack teeth, 8... Pinion, 10, 13... Pinion teeth, 11... Outer circumferential surface, 12... Stop mechanism section, 14... No stop section, 15, 16... Missing Tooth portion, 17... Rack end tooth, 18... Relief portion for stop mechanism, 19... Rack relief portion for no stop.

Claims (1)

[Claims] 1 One side of the piston is provided with a rack tooth carved in accordance with the opening/closing angle of the door, and a pinion provided to interlock with the opening/closing of the door. , a stop mechanism section with pinion teeth and an outer circumferential surface with no teeth that can be frictionally engaged with the rack teeth at the end thereof, and a no-stop section with only pinion teeth carved, and a stop mechanism section with a stop mechanism section. Missing tooth portions are provided between the non-sections, and a relief for the stop mechanism is provided at a non-opposing position in the tooth width direction of the outer peripheral surface of the stop mechanism section of the rack end tooth and the pinion. The door closer is provided with a rack relief part for non-stop and a rack relief part for non-stop, and has both functions with and without a stop by changing the engagement position of the pinion with the rack teeth.