KR100632173B1 - Door hinge with speed controller - Google Patents

Abstract

The door hinge has a speed controller having a shaft extending from the second cylinder into the first cylinder. The piston member is splined to the shaft and threaded to the inner circumferential surface of the first cylinder. The passage member in the first cylinder flows from the second chamber formed at one end of the piston member to the first chamber formed at the other end of the piston member within the first stroke range of the axial stroke of the piston member. And a first speed control passage for applying a first passage resistance to the first passage. The second speed control passage applies a second passage resistance to the fluid flowing from the second chamber to the first chamber within the second stroke range.

Door hinge

Description

Door hinge with speed controller {DOOR HINGE WITH SPEED CONTROLLER}

1 is a vertical sectional view showing an essential part of a door hinge with a speed controller according to the present invention;

FIG. 2 shows an end of the door hinge of FIG. 1. FIG.

Explanation of symbols on the main parts of the drawings

6 1st flap 8 2nd flap

10 door hinge 12 1st cylinder

14 2nd cylinder 16 speed controller

18 shaft 20 piston member

34 1st speed control passage 36 2nd speed control passage

The present invention relates to a door hinge with a door speed controller used for opening and closing the door.

For example, various door speed controllers have been developed that close open doors at a controlled speed. Such door speed controller includes a mechanism for controlling the door speed according to the rotational angle of the door between the open position and the closed position. Generally, such a door speed control mechanism uses a box-type damper fixed to the upper part of the door separately from the hinge attached to the door (see, for example, Japanese Patent Application Laid-Open (KOKAI) Hei 1-283445).

However, it is apparently desirable that a hinge, which is always attached to the door for opening and closing the door, performs a speed control function.

It is an object of the present invention to provide a door hinge that can apply an appropriate speed control force to the door according to the rotation angle of the door when the door is closed.

The present invention provides a door hinge for opening and closing the door. The door hinge has a first cylinder on which a first flap is fixed, and a second cylinder axially aligned with the first cylinder. The second flap is fixed to the second cylinder. The door hinge also has a speed controller for controlling the rotational speed of the second cylinder relative to the first cylinder.

The speed controller has a shaft fixed to the second cylinder and extending into the first cylinder from the first end of the first cylinder. The piston member is concentrically connected with the shaft in the first cylinder. The piston member is rotatable with the shaft and can be axially displaced with respect to the shaft. The piston member is screwed with the inner circumferential surface of the first cylinder. The piston member rotates as the shaft rotates with respect to the first cylinder with the second cylinder. Thus, the piston member is displaced with respect to the first cylinder when rotated between the first axial position and the second axial position. A passage member is provided in the first cylinder and fixed to the second end of the first cylinder.

The piston member is cylindrical and is in an annular space between the outer circumferential surface of the passage member and the inner circumferential surface of the first cylinder. A first chamber is formed between the first end of the first cylinder and the piston member. A second chamber is formed between the second end of the first cylinder and the piston member.

The passage member has one passage for communicating between the first chamber and the second chamber. In addition, the passage member has first and second speed control passages.

Due to the one passage, when the piston member is displaced from the first axial position to the second axial position toward the first chamber, fluid in the first chamber can flow through the one passage to the second chamber. The one passage prevents the fluid from flowing through the one passage when the piston member is displaced from the second axial position to the first axial position toward the second chamber.

The first speed control passage applies a first passage resistance to the fluid flowing from the second chamber to the first chamber within the first stroke range during the stroke of the piston member from the second axial position to the first axial position.

The second speed control passage applies a second passage resistance to the fluid flowing from the second chamber to the first chamber within the second stroke range during the stroke of the piston member from the second axial position to the first axial position.

Using the door hinge of the present invention, the door can be opened without resistance. In contrast, when the door is closed, it is possible to control the speed at which the door closes according to the range of the rotation angle of the door by appropriately setting the above-described first and second stroke ranges.

More specifically, the door hinge can be arranged as follows. The first speed control passage has a first annular groove formed on the outer circumferential surface of the passage member with a predetermined axial length, and a passage communicating with the first annular groove. The passageway extends in the axial direction and communicates with the first chamber.

The second speed control passage has a second annular groove formed on the outer circumferential surface of the passage member and axially spaced apart from the first annular groove, and a passage communicating with the second annular groove. The passageway extends in the axial direction and communicates with the first chamber.

The piston member has a radial through passage communicating with the second chamber through the piston member in the radial direction. The radial through passage communicates with the first annular groove when the piston member is within the first stroke range and with the second annular groove when the piston member is within the second stroke range.

In addition, the door hinge may be arranged as follows. The first and second speed control passages are arranged as described above. The piston member has first and second radial through passages that communicate with the second chamber through the piston member in the radial direction. The first radial through passage communicates with the first annular groove when the piston member is within the first stroke range, and the second radial through passage communicates with the second annular groove when the piston member is within the second stroke range.

The first and second speed control passages may be provided with respective members for controlling the resistance applied by the respective passages.

More specifically, it may be arranged as follows. The first stroke range corresponds to the final partial range of the total stroke of the piston member from the second axial position to the first axial position. The second stroke range corresponds to a range preceding the final partial range of the total stroke. The passage resistance applied by the first speed control passage is smaller than the passage resistance applied by the second speed control passage.

With this arrangement, a large deceleration force is applied to the door for a relatively large angle range starting from the beginning of the closing movement of the door. Therefore, the door is rotated at a relatively slow speed. Since the deceleration force is relaxed just before the door closing movement is finished, the door can be securely closed.

The objects, structures and advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

Hereinafter, embodiments of the door hinge according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a vertical sectional view showing an essential part of the door hinge 10 according to the present invention. The right half of Fig. 1 shows the state of the speed limiter (to be described later) when the door is opened. The left half of Fig. 1 shows the state of the speed controller when the door is closed.

As shown in FIG. 1, the door hinge 10 has a first cylinder 12 to which the first flap 6 is fixed. The first flap is attached to the door frame. The second cylinder 14 is axially aligned with the first cylinder 12. The second flap 8 is fixed to the second cylinder 14 and attached to the door. The door hinge 10 also includes a speed controller 16 that controls the speed of the second cylinder 14 rotating relative to the first cylinder 12 when the open door is rotated and closed.

The speed controller 16 has a shaft 18 fixed to the second cylinder 14 and located in the first cylinder 12 from the first end 12-1 of the first cylinder. The piston member 20 is splined to the distal end of the shaft 18 in the first cylinder 12. The piston member 20 is rotatable with the shaft 18 and axially displaceable with respect to the shaft 18. The piston member 20 has an external thread 20-1 engaged with an internal thread 12-3 formed on the inner circumferential surface of the first cylinder 12. The piston member 20 rotates as the shaft 18 rotates with respect to the first cylinder 12 together with the second cylinder 14. In this way, the piston member 20 has a first axial position shown in the left half of FIG. 1 and a second axial position shown in the right half of FIG. 1 (first cylinder 12 rather than the first axial position). Is closer to the first cylinder 12 between.

The speed controller 16 also has a cylindrical passage member 22 which is fixed to the second end 12-2 of the first cylinder 12 by the annular fixing member 17. The piston member 20 is cylindrical and is located in an annular space formed between the outer circumferential surface of the passage member 22 and the inner circumferential surface of the first cylinder 12. The first chamber 24 is formed between the first end 12-1 of the first cylinder 12 and the piston member 20. The second chamber 26 is formed between the second end 12-2 of the first cylinder 12 and the piston member 20. A third chamber 25 is formed between the passage member 22 and the shaft 18. The third chamber 25 is surrounded by the piston member 20. The third chamber 25 is communicated with the first chamber 24 through a communication passage 20-2 formed between the shaft 18 and the piston member 20 and leading to the first chamber 24.

The passage member 22 is provided with one passage 28 which communicates between the first chamber 24 and the second chamber 26 via the communication passage 20-2 and the third chamber 25. In addition, the passage member 22 includes first and second speed control passages 34 and 36. One passage 28 has a check valve 30, and the piston member 20 is positioned from the first axial position (shown in the left half of FIG. 1) to the second axial position (shown in the right half of FIG. 1). When displaced into, the check valve allows fluid in the first chamber 24 to flow into the second chamber through the communication passage 20-2, the third chamber 25 and the one passage 28. The one passage 28 with the check valve 30 prevents the fluid from flowing through the one passage 28 when the piston member 20 is displaced from the second axial position to the first axial position.

The first speed control passage 34 has an annular groove 34-1 provided on the outer circumferential surface of the passage member 22. The radial passage 34-2 extends radially inward from the annular groove 34-1. The axial passage 34-3 is connected to the radial passage 34-2 and extends in the axial direction with respect to the door hinge 10 to the third chamber 25. The passage resistance control member 34-4 is formed in the shaft passage 34-3. The passage resistance control member 34-4 is screwed into the shaft passage 34-3. By rotating the passage resistance control member 34-4 about its own axis and changing its position in the axial direction, the passage resistance applied to the fluid passing through the first speed control passage 34 (resulting in deceleration force) ) Is controlled.

The second speed control passage 36 has a configuration similar to the first speed control passage 34. That is, the second speed control passage 36 has an annular groove 36-1 provided on the outer circumferential surface of the passage member 22. The annular groove 36-1 is located closer to the first end 12-1 of the first cylinder 12 than the annular groove 34-1. The radial passage 36-2 extends radially inward from the annular groove 36-1. The axial passage 36-3 is connected to the radial passage 36-2 and extends axially from the door hinge 10 to the third chamber 25. The passage resistance control member 36-4 is formed in the shaft passage 36-3. By rotating the passage resistance control member 36-4 about its axis, the passage resistance (hence the deceleration force) applied to the fluid passing through the second speed control passage 36 is controlled.

The piston member 20 has a radial through hole 38 which radially penetrates the piston member and communicates with the second chamber 26. The radial through hole 38 is the initial stroke range during the stroke of the piston member 20 from the second axial position (shown in the right half of FIG. 1) to the first axial position (shown in the left half of FIG. 1). Communicate with the annular groove 36-1 of the second speed control passage 36 (corresponding to the " first stroke range "). In the next stroke range following the initial stroke range, the radial through hole 38 has an annular groove 36-1 of the second speed control passage 36 and an annular groove 34-1 of the first speed control passage 34. Pass all). In the final stroke range (corresponding to the "second stroke range"), the radial through hole 38 communicates with the annular groove 34-1 of the first speed control passage 34. In the following, this configuration will be described in relation to the closing movement of the door. Due to the relative rotation between the first cylinder 12 and the second cylinder 14 due to the door closing movement, the fluid flows from the second chamber 26 toward the first chamber 24. If the closing door is in a relatively large angle range from the open position, the fluid flows through the second speed control passage 36. If the closing door is in a relatively small angle range just before it is fully closed, the fluid flows through the first speed control passage 34. If the speed controller 16 makes the passage resistance in the second speed control passage 36 large and the passage resistance in the first speed control passage 34 small, the door closes slowly at a safe speed. The closing movement is accelerated just before the door is completely closed, so that the door can be securely closed.

Although the door hinge according to the present invention has been described as an embodiment, the present invention is not limited to the described embodiments and may be variously modified. For example, three or more speed control passages may be formed as necessary. In doing so, the door closing speed can be controlled within three or more angle ranges. The apparatus of the present invention is also applicable to a projecting suspension type door closer. In the above-described embodiment, only one radial through hole 38 is formed in the piston member, but the arrangement in which the piston member includes the first and second radial through holes is also possible. The first radial through hole communicates with the first annular groove when the piston member is within the first stroke range, and the second radial through hole communicates with the second annular groove when the piston member is within the second stroke range. In this case, the communication time between the first radial through hole and the first annular groove and the communication time between the second radial through hole and the second annular groove may overlap.

The present invention provides a door hinge that can apply an appropriate speed control force to the door according to the rotation angle of the door when the door is closed.

Claims (6)

A first cylinder, to which the first flap is fixed, A second cylinder having a second flap fixed thereto and axially aligned with the first cylinder, and A door hinge used for opening and closing a door, comprising a speed controller for controlling the rotational speed of the second cylinder relative to the first cylinder, The speed controller, A shaft fixed to the second cylinder and extending into the first cylinder from the first end of the first cylinder, A piston member concentrically connected with the shaft in the first cylinder, and Has a passage member provided in the first cylinder and fixed to the second end of the first cylinder, The piston member is rotatable with the shaft and can be axially displaced with respect to the shaft, the piston member being screwed with the inner circumferential surface of the first cylinder such that the shaft is coupled to the first cylinder together with the second cylinder. As the piston rotates, the piston member is displaced relative to the first cylinder between the first and second axial positions, The piston member is cylindrical and in an annular space between the outer circumferential surface of the passage member and the inner circumferential surface of the first cylinder, a first chamber is formed between the first end of the first cylinder and the piston member, and the second end of the first cylinder. And a second chamber is formed between the piston member, The passage member has one passage for communicating between the first chamber and the second chamber, and also has first and second speed control passages, Due to the one passage, when the piston member is displaced from the first axial position to the second axial position toward the first chamber, fluid in the first chamber can flow through the one passage into the second chamber, the one passage being Preventing the fluid from flowing through the one passage when the piston member is displaced from the second axial position to the first axial position towards the second chamber, The first speed control passage applies a first passage resistance to the fluid flowing from the second chamber to the first chamber within the first stroke range during the stroke of the piston member from the second axial position to the first axial position, The second speed control passage is configured to apply a second passage resistance to the fluid flowing from the second chamber to the first chamber within the second stroke range during the stroke of the piston member from the second axial position to the first axial position. Door hinge characterized by the above-mentioned. The method of claim 1, The first speed control passage has a first annular groove formed on an outer circumferential surface of the passage member with a predetermined axial length, and a passage communicating with the first annular groove, the passage extending in the axial direction and being made of a first annular groove. 1 is in communication with the chamber, The second speed control passage has a second annular groove formed on the outer circumferential surface of the passage member and axially spaced apart from the first annular groove, and a passage communicating with the second annular groove, the passage being in the axial direction. Stretches to communicate with the first chamber, The piston member has a radial through passage communicating radially through the piston member in communication with the second chamber, the radial through passage communicating with the first annular groove when the piston member is within the first stroke range. A door hinge in communication with the second annular groove when the piston member is in the second stroke range. The method of claim 1, The first speed control passage has a first annular groove formed on an outer circumferential surface of the passage member with a predetermined axial length, and a passage communicating with the first annular groove, the passage extending in the axial direction and being made of a first annular groove. 1 is in communication with the chamber, The second speed control passage has a second annular groove formed on the outer circumferential surface of the passage member and axially spaced apart from the first annular groove, and a passage communicating with the second annular groove, the passage being in the axial direction. Stretches to communicate with the first chamber, The piston member has first and second radial through passages that radially penetrate the piston member and communicate with the second chamber, wherein the first radial through passage is within the first stroke range. And the second annular through passage communicates with the second annular groove when the piston member is within the second stroke range. The method of any one of claims 1 to 3, wherein the first and second speed control passages are provided with respective members for controlling the first and second passage resistances applied by the respective passages. Door hinge. The method of claim 1, wherein the first stroke range corresponds to the final partial range of the total stroke of the piston member from the second axial position to the first axial position, wherein the second stroke range is A door hinge, the passage resistance in the first speed control passage being smaller than the passage resistance in the second speed control passage throughout the total stroke. The method of claim 4, wherein the first stroke range corresponds to the final partial range of the total stroke of the piston member from the second axial position to the first axial position, and the second stroke range is in the final partial range throughout the total stroke. The door hinge of the preceding range, wherein the passage resistance in the first speed control passage is smaller than the passage resistance in the second speed control passage.

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