JP5363883B2 - Buffer stay for door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buffering stay preventing a window or a door from bumping strongly against a frame of an opening even when the window or the door is let go in the course of closing operation. <P>SOLUTION: The stay 1 includes an outer pipe 2, and an internal insertion member 3 slidably housed in it in an axially telescopic manner. A ratchet mechanism by which extension is allowed though contraction is inhibited before reaching a position of the utmost extension is housed in the stay 1. Consequently, the door can be held in the opened state at an intended position in the course of the extension. When the door is pushed and opened widely beyond the fully-opened position and the stay 1 is extended utmost, a ratchet control mechanism releases the lock of the ratchet mechanism, by which the door 13 can be closed freely. An abutting member 10 abuts on a front end of a piston rod 6 of a damper 4 in the course of the closing operation of the door 13, and the closing operation of the door 13 by its own weight thereafter is dampened by the damper 4. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention prevents a door pivotally supported by an opening frame, such as a canopy or a front cover, from strongly colliding with the opening frame by closing its own weight when closing the opening. Therefore, the present invention relates to a door stay interposed between a door and a frame.

Patent Document 1 discloses a switch (stay) having a function of supporting a window that is not fully closed at a position where the window is fully opened and supporting the window even when the window is partially opened. Has been.
The stay includes an outer cylinder and an insertion member that is slidably accommodated in the outer cylinder so as to expand and contract in the axial direction. The base end of the outer cylinder is pivotally supported by the frame of the opening, and the distal end of the insertion member is pivotally supported by the window. A ratchet mechanism and a ratchet control mechanism are provided between the outer cylinder and the insertion member. The ratchet mechanism includes ratchet teeth provided on the outer cylinder and ratchet claws provided on the insertion member, and normally allows the extension operation of the insertion member but prevents the contraction operation. The ratchet control mechanism includes two cams that forcefully rotate the ratchet pawl at the position immediately before the insertion member reaches the maximum extension position and the most contracted position, and the biasing direction of the ratchet pawl beyond the dead point when the ratchet pawl is forced to rotate. When the insertion member reaches the maximum extension position, the biasing direction of the ratchet pawl is changed to release the ratchet engagement and allow the insertion member to contract. Further, it has a function of returning the ratchet engagement by restoring the urging direction of the ratchet pawl at the most contracted position.
However, since this stay does not have a buffering function for the closing operation, if the hand is released from the window on the way, the window strongly collides with the frame of the opening due to its own weight closing.
On the other hand, the damper which buffers the impact at the time of the closing operation | movement of the door which swings furniture is described in patent document 2 (refer FIG. 9) and patent document 3 (refer FIG. 7, 8). This damper is attached separately from the stay.

JP 2000-064693 A JP 2006-104680 A JP 2001-059377 A

In the conventional stay described above, when the window or door is closed, the ratchet engagement is released to allow the window to be freely closed. May collide strongly, resulting in noise and damage to members. In order to prevent this, it is necessary to install a damper separately from the stay.
In addition, as a stay (door closer) with a shock absorber, a large-sized one that is applied to a door for a joinery such as an entrance door is commercially available, but there is no small one that can be obtained at low cost.
Therefore, the invention according to this application provides a stay with a simple structure, a small size, and an inexpensive stay that cushions windows and doors so that they do not strongly collide with the opening frame even if the hand is released during the closing operation. It is an object.

Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above problems, the stay 1 of the invention according to this application includes an outer cylinder 2, an insertion member 3 slidably accommodated in the outer cylinder 2 so as to expand and contract in the axial direction, A ratchet mechanism that is provided between the tube 2 and the insertion member 2 and normally allows the extension operation of the insertion member 3 but prevents the contraction operation, and a ratchet immediately before the insertion member 3 reaches the maximum extension position. A ratchet control mechanism for releasing the engagement and allowing the retracting operation of the insertion member to return the ratchet engagement again at the most contracted position; and a damper 4 fixed to the tip of the outer cylinder 2; And an abutting member 10 provided at the distal end of the insertion member 3. The damper 4 includes a cylinder 5 that is fixed on the outer cylinder 2 with its axis parallel to the axis of the outer cylinder 2, and a piston rod 6 that is inserted into the cylinder 5. The piston rod 6 is normally urged so that the tip is in the extended position protruding in the axial direction from the tip of the outer cylinder 2 by a predetermined distance, and the contraction operation is buffered by hydraulic pressure or the like. The abutting member 10 is disposed at a position where it abuts against the tip of the piston rod 6 of the damper 4 immediately before the insertion member 3 reaches the most contracted position, whereby the self-weight closing operation of the door 13 is buffered.

  According to the stay of the invention according to this application, even if the hand is released from the door during the closing operation, the abutting member abuts against the piston rod of the damper immediately before the closing position, so that the rotational motion is buffered, and the door There is no strong collision with the frame of the opening. This stay has a very simple structure, is easy to manufacture, can be obtained at a low cost, and can be kept small and light.

It is a side view of the attachment state of the buffer stay for doors concerning this invention. It is a perspective view of the buffer stay for doors of FIG.

Embodiments of the present invention will be described with reference to the drawings.
The stay 1 includes an outer cylinder 2 and an insertion member 3 slidably accommodated in the outer cylinder 2 so as to expand and contract in the axial direction. A ratchet mechanism (not shown) and a ratchet control mechanism are provided between the outer cylinder 2 and the insertion member 3. The ratchet mechanism includes, for example, ratchet teeth provided on the outer cylinder and ratchet claws provided on the insertion member, and allows the extension operation of the insertion member 3 at all times, but prevents the contraction operation. The ratchet control mechanism switches the urging direction of the ratchet claw beyond the dead point when the insertion member 3 reaches the most extended position and the most contracted position and forcibly rotates the ratchet claw when the ratchet claw is forcibly rotated. And an urging spring. By this ratchet control mechanism, when the insertion member reaches the maximum extension position, the biasing direction of the ratchet pawl is changed to release the ratchet engagement and allow the insertion member to contract. It has a function of restoring ratchet engagement by restoring the biasing direction of the ratchet pawl. The specific configurations of the ratchet mechanism and the ratchet control mechanism are well-known as described in, for example, Japanese Patent Application Laid-Open No. 2000-064693, and thus detailed description thereof is omitted.

  As shown in FIG. 1, the stay 1 is used by being attached between the casing 11 and the door 13 with mounting brackets 7 and 9. The door 13 is pivotally attached to the opening frame of the housing 11 via the hinge 12. The position immediately before the insertion member 3 of the stay 1 reaches the maximum extension position of the door 13 is a fully open position (C position indicated by a solid line in FIG. 1).

  The outer cylinder 2 is a substantially flat rectangular tube-shaped long material. An attachment fitting 7 is pivotally attached to the base end portion of the outer cylinder 2 by a pivot pin 8. A damper 4 is fixed to the tip of the outer cylinder 2.

  The insertion member 3 is a long plate-like member, and its proximal end is inserted into the outer cylinder 2 so as to be slidable in the axial direction. An attachment fitting 9 is pivotally attached to the distal end portion of the insertion member 3 by a pivot pin 10. The pivot pin 10 also serves as an abutting member that abuts against a piston rod 6 of the damper 4 described later when contracted.

  The damper 4 includes a cylinder 5 and a piston rod 6 inserted into the cylinder 5. The cylinder 5 is fixed on the outer cylinder 2 with its axis parallel to the axis of the outer cylinder 2. The piston rod 6 is normally urged so that the tip is in the extended position protruding in the axial direction from the tip of the outer cylinder 2, and the contraction operation is buffered by hydraulic pressure or the like.

  The cylinder 5 of the damper 4 is filled with a spring and a fluid having viscosity such as oil or grease (for example, Japanese Patent Laid-Open No. 2001-059377 (FIG. 1), Japanese Patent Laid-Open No. 2004-190470 (FIG. 3)). reference). The fluid generates a resistance force against the pushing operation of the piston rod 6 into the cylinder 5 and absorbs the impact. Further, the piston rod 6 is returned to the original position by the spring. The damper 4 is not limited to the above-described configuration, and a shock absorber that can be generally used as a shock absorber, an oil damper, or the like can be applied.

  The abutting member 10 is attached to the tip of the piston rod 6 of the hydraulic damper 4 immediately before the insertion member 3 reaches the most contracted position (A position indicated by an imaginary line in FIG. 1) (B position indicated by an imaginary line in FIG. 1). It arrange | positions in the position which contact | abuts, and the dead weight closing operation | movement of the door 13 is buffered by it.

  In FIG. 1, the door 13 can be opened while extending the stay 1 from the closed position (A position) to the fully open position (C position) indicated by a solid line, and at an arbitrary opening angle so far. It is held by the stay 1. When the door 13 is closed, the door 13 is temporarily rotated to the unlocking position (D position indicated by the phantom line) at a larger angle than the fully open position (C position) to disengage the internal ratchet pawl (not shown). Then, the door 13 can freely rotate in the closing direction while contracting the stay 1. When the door 13 reaches the B position in the middle of the closing operation, the contact member 10 comes into contact with the tip of the piston rod 6 of the hydraulic damper 4, and the subsequent rotation of the door 13 is braked. Therefore, even if the hand is released from the door 13 during the closing operation, it does not collide with the housing 11 violently.

DESCRIPTION OF SYMBOLS 1 Stay 2 Outer cylinder 3 Insertion member 4 Damper 5 Cylinder 6 Piston rod 7 Mounting bracket 8 Pin 9 Mounting bracket 11 Housing 12 Hinge 13 Door

Claims (2)

In order to prevent the door pivotally supported by the opening frame to open and close the opening, to strongly collide with the opening frame by its own weight rotation when closing the opening, it is interposed between the door and the frame. A door stay,
An outer cylinder whose base end side is pivotally supported by the frame of the opening, and an inner cylinder whose base end side is slidably accommodated in the outer cylinder and extends and contracts in the axial direction of the outer cylinder, and whose front end side is pivotally supported by the door A ratchet mechanism that is provided between the insertion member, the outer cylinder, and the insertion member, and that normally allows the extension operation of the insertion member but prevents the contraction operation, and ratchet engagement when the insertion member reaches the maximum extension position A ratchet control mechanism that releases the ratchet and permits the contraction operation of the insertion member and returns the ratchet engagement again at the most contracted position,
Furthermore, the damper fixed to the front-end | tip part of the said outer cylinder, and the contact member provided in the front-end | tip part of the said insertion member were comprised,
The damper is attached to a cylinder that is fixed on the outer cylinder with its axis parallel to the axis of the outer cylinder, and is always attached so that the tip protrudes from the tip of the outer cylinder in the axial direction by a predetermined distance. A piston rod that is urged and cushioned for contraction,
The abutting member is disposed at a position where the abutting member abuts against a tip of the piston rod of the damper immediately before the insertion member reaches the most contracted position, thereby buffering a self-weight closing operation of the door. Buffer stay for doors.   A fitting for connecting the insertion member to the door is pivotally attached to the distal end portion of the insertion member by a pivot pin. 2. The door cushion stay according to claim 1, wherein the pivot pin constitutes the abutting member.

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