JP5452990B2 - Closer device for elevator hall door - Google Patents

Description

  The present invention relates to a closer device that constantly urges an elevator hall door in a closing direction.

  2. Description of the Related Art Conventionally, a closer device is known in which an elevator hall door is always urged in a door closing direction (closing direction) by an urging force of a mainspring wound around a drum (see, for example, Patent Document 1).

  More specifically, in this type of closer device, a drum connected to an elevator hall door and capable of winding a wire, and one end connected to a drum and the other end connected to a rotating shaft coaxially with the drum are connected. A mainspring, and the urging force of the mainspring urges the drum in the direction of winding the wire, thereby constantly urging the door of the elevator hall in the closing direction.

Japanese Utility Model Publication No. 62-186878

  However, the above-described closer device has the following problems. That is, as the drum rotates in the winding direction, the biasing force due to the mainspring decreases, and as the drum rotates in the direction opposite to the winding direction, the biasing force due to the mainspring increases. Therefore, when the elevator hall door is closed, the drum is rotating in the winding direction, so that the urging force by the mainspring is reduced, and the sealing performance between the elevator hall door and the frame member of the opening is lowered. is there. In addition, when the elevator hall door is opened, the drum rotates in the direction opposite to the winding direction, so that the urging force of the mainspring increases, and the elevator hall door is opened against the urging force of the drum mainspring. However, there is a problem that the load of the driving motor that must be maintained is increased.

  The present invention has been made in view of such problems, and the object of the present invention is to improve the sealing performance between the elevator hall door and the frame member of the opening at the time of closing, and the biasing force by the mainspring of the drum An object of the present invention is to provide a technique for reducing the load of a driving motor that opens an elevator hall door against the above.

An elevator hall door closer device according to claim 1, which is made to solve the above-mentioned problem, is rotatably supported and is movable between an open position for opening an opening of the elevator hall and a closed position for closing. A drum capable of winding a linear body connected to an elevator hall door when the elevator hall door moves from the open position to the closed position; and one end connected to the drum and the other end to the drum An urging member connected to a rotation shaft arranged on the same axis and urging the linear body in a direction to wind the linear body around the drum, and the wound linear body is pulled out in the circumferential direction of the drum in closer apparatus configured to allow the elevator hall door, the circumferential surface of the drum, than the starting end side of the rotation radius of the change rate with respect to the drum is located at the center side of the drum It formed an inflection point where towards the end side becomes smaller positioned on the outer peripheral side of the serial drum spiral shape having one or more, in the starting end side than the inflection point in the circumferential surface of the drum, the said drum As the linear body is wound, the pulling force, which is a force required to pull out the linear body from the drum, has an increase / decrease rate of the turning radius, and the linear body to be wound is started from the end. A locking portion that can be locked along the line is formed.

According to the elevator landing door closer apparatus of the present invention configured as described above, the following operational effects are obtained.
(1) As the linear body is wound around the drum, the position where the linear body is wound around the drum (winding position) shifts to the center side of the drum (starting end side of the spiral). Further, as the linear body is wound around the drum, the degree of deformation of the urging member becomes smaller, and the urging force by the urging member becomes smaller. As a result, the pulling force, which is a force required for the linear body to be pulled out from the drum, becomes larger than that in the conventional configuration. Therefore, when the elevator hall door is closed, the hermeticity between the elevator hall door and the opening frame member is higher than that of the conventional configuration.

  (2) As the linear body is pulled out from the drum, the position at which the linear body is pulled out from the drum (drawing position) shifts to the outer peripheral side of the drum (end side of the spiral). Further, as the linear body is pulled out from the drum, the degree of deformation of the urging member increases, and the urging force by the urging member increases. As a result, the pulling power may be smaller than that of the conventional configuration. Therefore, when the elevator hall door is opened, the load on the drive motor that must keep the elevator hall door open against the biasing force of the mainspring of the drum is smaller than that of the conventional configuration.

  (3) Since the relationship between the amount (stroke amount) with which the linear body is drawn from the drum and the pull output changes according to the number and position of the inflection points, the pull output characteristics can be set freely. Can do. This also contributes to an improvement in the sealing performance between the elevator hall door and the opening frame member when closed, and a reduction in the load on the drive motor.

  Therefore, it is possible to reduce the load of the driving motor that opens the elevator landing door against the biasing force of the mainspring of the drum while improving the sealing performance between the elevator landing door and the opening frame member when closed. .

  In addition, about the above-mentioned latching | locking part, it is possible to form in the groove shape which can contain a linear body (Claim 2). This also contributes to an improvement in the sealing performance between the elevator hall door and the opening frame member when closed, and a reduction in the load on the drive motor.

(A) is the external view which looked at the closer apparatus of the elevator hall door of this embodiment from the front, (b) is AA sectional drawing. It is explanatory drawing which shows the characteristic of the closer apparatus of the elevator hall door of this embodiment. It is explanatory drawing which shows operation | movement of the closer device of the elevator hall door of this embodiment, (a) shows the state in which an elevator hall door exists in a closed position, (b) moves an elevator hall door from a closed position to an open position. (C) shows a state where the elevator hall door is in the open position.

Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to embodiment described below, It is possible to implement in various aspects.
A closer device 10 shown in FIG. 1 has a function of always urging an elevator hall door 3 movable between an open position for opening the opening 2 of the elevator hall 1 and a closed position for closing the elevator hall 1 in the closing direction.

  Specifically, the closer device 10 includes a drum 12 and a mainspring 14 as an urging member. Hereinafter, the drum 12 and the mainspring 14 will be described. In addition, since the other structure of the closer apparatus 10 follows a well-known technique, the detailed description is abbreviate | omitted here.

  The drum 12 is rotatably supported and can wind up a wire rope (linear body) 4 connected to the elevator landing door 3 when the elevator landing door 3 moves from the open position to the closed position. The wound wire rope 4 can be pulled out in the circumferential direction of the drum 12.

  The mainspring 14 has one end connected to the drum 12 and the other end connected to a rotating shaft 16 arranged coaxially with the drum 12, and biases the wire rope 4 in a direction to wind the wire rope 4 around the drum 12.

  Furthermore, the drum 12 of this embodiment has the following characteristics. That is, the drum 12 is formed in a substantially truncated cone shape. Further, a groove 12 b that can enclose the wire rope 4 to be wound is formed on the peripheral surface 12 a of the drum 12. In addition, the groove | channel 12b corresponds to the latching | locking part of a claim. The groove 12b is viewed from the front in the form of a spiral having one inflection point where the rate of increase / decrease in the radius of rotation (distance from the center point of the drum 12) with respect to the drum 12 is smaller on the end side than on the start side. It is formed to the right and is opened in the circumferential direction of the drum 12. In the present embodiment, one inflection point is set on the spiral forming the groove 12b (see FIG. 2), but a plurality of inflection points may be set on the spiral. An end attached to one end of the wire rope 4 is hooked to the outer end 12c (corresponding to the end of the claims) of the groove 12b, and the groove 12b is wound on the wire rope 4 to be wound. Can be included along the inner end 12d (corresponding to the start end of the claims) from the outer end 12c. Therefore, the wire rope 4 is wound around the groove 12b in the circumferential direction of the drum 12 or pulled out from the groove 12b.

A hook 5 is attached to the other end of the wire rope 4, and the hook 5 is attached to the elevator hall door 3.
The elevator hall door 3 is connected to an open device 20 having a function of urging the elevator hall door 3 in the opening direction (see FIG. 3).

  The opening device 20 includes a drum (not shown) that can wind up the wire rope 22 connected to the elevator hall door 3 and a drive motor (not shown) that can rotate the drum. By rotating the drum in the direction to wind up the wire rope 22 by the driving force, the elevator hall door 3 is biased in the opening direction.

Next, the operation of the closer apparatus 10 will be described with reference to FIG.
As illustrated in FIG. 3A, when the power of the drive motor of the open device 20 is off, the drive force by the drive motor does not act, and the elevator landing door 3 is attached by the closer device 10. Only powers will act. Then, the elevator hall door 3 moves from the open position to the closed position, and the wire rope 4 is wound around the drum 12 by the urging force of the mainspring 14. As the wire rope 4 is wound around the drum 12, the position where the wire rope 4 is wound around the drum 12 (winding position) shifts to the center side of the drum 12 (starting end side of the groove 12 b). Further, as the wire rope 4 is wound around the drum 12, the degree of deformation of the mainspring 14 decreases, and the urging force of the mainspring 14 decreases. As a result, the pulling force, which is the force required for the wire rope 4 to be pulled out from the drum 12, becomes larger than in the conventional configuration. Therefore, when the elevator hall door 3 as illustrated in FIG. 3A is closed, the hermeticity between the elevator hall door 3 and the frame member of the opening 2 is higher than the conventional configuration (see FIG. 2).

  On the other hand, when the power of the driving motor of the open device 20 is turned on from off, the driving force by the driving motor acts, and not only the urging force by the closer device 10 but also the urging force by the open device 20 is applied to the elevator hall door 3. Works. The urging force by the opening device 20 is set to be larger than the urging force by the closer device 10, the elevator hall door 3 moves from the closed position to the open position (see FIG. 3B), and the drum The wire rope 4 is pulled out from 12. As the wire rope 4 is pulled out from the drum 12, the position where the wire rope 4 is pulled out from the drum 12 (drawing position) shifts to the outer peripheral side of the drum 12 (the end side of the groove 12b). Further, as the wire rope 4 is pulled out from the drum 12, the degree of deformation of the mainspring 14 increases, and the urging force of the mainspring 14 increases. As a result, the pulling power may be smaller than that of the conventional configuration. Therefore, when the elevator hall door 3 as illustrated in FIG. 3C is opened, the load of the driving motor that must keep the elevator hall door 3 open against the urging force of the mainspring 14 of the drum 12. Is smaller than the conventional configuration (see FIG. 2).

  Therefore, according to the closer device 10 of the present embodiment, the elevator hall against the urging force of the mainspring 14 of the drum 12 is improved while improving the sealing performance between the elevator hall door 3 and the frame member of the opening 2 when closed. The load on the drive motor of the open device 20 that opens the door 3 can be reduced.

  In addition, as shown in FIG. 2, since one inflection point is set on the spiral forming the groove 12b, the rate of increase of the turning radius decreases before and after the inflection point, and the pulling power decreases. The rate also decreases. This contributes to a reduction in the load on the drive motor of the open device 20.

  By changing the setting position of the inflection point, the relationship between the amount (stroke amount) of the wire rope 4 pulled out from the drum 12 and the pull output changes, so the pull output characteristics can be set freely. be able to. Also, by changing the set number of inflection points, the relationship between the amount (stroke amount) the wire rope 4 is drawn from the drum 12 and the pull output changes, so the pull output characteristic can be set freely. be able to. These also contribute to the improvement of the sealing property between the elevator hall door 3 and the frame member of the opening 2 at the time of closing, and the reduction of the load of the driving motor of the open device 20.

DESCRIPTION OF SYMBOLS 1 ... Elevator hall, 2 ... Opening part, 3 ... Elevator hall door, 4 ... Wire rope, 5 ... Hook, 10 ... Closer apparatus, 12 ... Drum, 12a ... Drum peripheral surface, 12b ... Drum peripheral groove, 12c ... outer end of groove, 12d ... inner end of groove, 16 ... rotary shaft, 20 ... open device, 22 ... wire rope

Claims (2)

The elevator hall door is closed from the open position to a linear body connected to the elevator hall door that is rotatably supported and is movable between an open position for opening the opening of the elevator hall and a closed position for closing. A drum that can be wound when moving to a position;
An urging member having one end connected to the drum and the other end connected to a rotating shaft disposed coaxially with the drum, and urging the linear body in a direction to wind the linear body;
An elevator hall door closer device configured such that the wound linear body can be pulled out in the circumferential direction of the drum,
On the peripheral surface of the drum, there is one inflection point at which the increase / decrease rate of the rotation radius with respect to the drum is smaller on the end side located on the outer peripheral side of the drum than on the start side located on the center side of the drum It is formed in a spiral shape having the above, and is required to draw out the linear body from the drum as the linear body is wound around the drum on the start end side of the inflection point on the peripheral surface of the drum. An elevator having an increasing / decreasing rate of the turning radius that increases a pulling force as a force and capable of locking the wound linear body from a terminal end to a starting end. Closer device for landing doors.   The said latching | locking part is formed in the groove shape which can contain the said linear body, The closer apparatus of the elevator hall door of Claim 1 characterized by the above-mentioned.

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