JP2021095805A - Self-closing device for sliding door - Google Patents

Abstract

To prevent reverse winding of a spiral spring in a self-closing device for a sliding door.SOLUTION: Included are: a first take-up drum 65 that rotates in a first direction in conjunction with an opening movement of a sliding door and rotates in a second direction during a closing movement; a second take-up drum 66 that is located adjacent to the first take-up drum 65; and a spiral spring 67 that is wound on the second take-up drum 66 when the sliding door is fully closed. The spiral spring is configured to be pulled out of the second take-up drum 66 and wound on the first take-up drum 65 according to the rotation of the first take-up drum 65 in the first direction, and a reverse winding prevention element 93 is provided which prevents reverse winding of the spiral spring by causing a portion 67' of the spiral spring 67 to be in contact with a part between the first take-up drum 65 and the second take-up drum 66.SELECTED DRAWING: Figure 6

Description

The present invention relates to a sliding door self-closing device.

A sliding door provided with a self-closing device, for example, forms an opening by manually opening the sliding door, and the opened sliding door is automatically closed by the self-closing device.

The self-closing device of the sliding door is equipped with a spring, and the force of the spring to return to the original winding state is used to move the opened sliding door in the closing direction. More specifically, one end of the wire is fixed to the first wire winding drum provided outside the self-closing device, and the other end of the wire is fixed to the second wire winding drum provided on the door end side of the sliding door. In the fully closed state of the sliding door, one end side of the wire is wound around the first wire winding drum. When the sliding door is opened, the wire is pulled out from the first wire winding drum, and the other end side of the wire is wound by the second wire winding drum. One end of the mainspring of the self-closing device is fixed to a winding body fixed to a shaft that rotates in conjunction with the rotation of the first wire winding drum, and the first wire winding when the sliding door is opened. In conjunction with the rotation of the drum, the mainspring of the self-closing device is pulled out from the original winding state and wound around the winding body. When the sliding door is opened, the mainspring wound around the winding body closes the sliding door in the open posture by a force (winding) that returns to the original winding state. Such a self-closing device is described in, for example, Patent Document 1.

In such a self-closing sliding door, if a wire is attached in a state where the wire winding direction of the first wire winding drum is incorrect at the time of installation, the first wire winding drum rotates in the opposite direction when the sliding door is opened. As a result, the shaft on which the winding body is fixed and the winding body rotate in opposite directions, and the mainspring spring is reversely wound around the winding body, which may cause the mainspring spring to fail or be damaged.
JP 2001-20594

An object of the present invention is to prevent reverse winding of a mainspring spring in a self-closing device for a sliding door.

The technical means adopted by the present invention is
The first take-up body that rotates in the first direction in conjunction with the opening movement of the sliding door and rotates in the second direction when the sliding door is closed.
The second winding body arranged adjacent to the first winding body and
The mainspring that is wound around the second winding body when the sliding door is fully closed,
With
The spring is pulled out from the second winding body and wound around the first winding body according to the rotation of the first winding body in the first direction.
The sliding door is self-closing, which is provided with a reverse winding prevention element that prevents the reverse winding of the mainspring spring by abutting the portion of the spring between the first winding body and the second winding body. The device.
"Reverse winding" means trying to wind the mainspring by rotation in the second direction of the first winding body.
The reverse winding prevention element may come into contact with the portion of the mainspring from the non-contact position when preventing the reverse winding of the mainspring, or may be in the contact position at normal times (contact in a state that allows normal winding of the mainspring). ), When the mainspring exhibits a reverse winding behavior, it may come into contact so as to regulate the movement of the mainspring in the reverse winding direction.
In one embodiment, the reverse winding prevention element prevents reverse winding when the opening operation is started from the fully closed state of the sliding door.
In one embodiment, one end of the spring is fixed to the first winding body and the other end is fixed to the second winding body.

In one embodiment, the portion of the spring is a portion of the spring that extends between the first winding body and the second winding body.
In one embodiment, the portion of the mainspring that extends between the first take-up body and the second take-up body is a portion of the mainspring located at the end of the mainspring on the first take-up body side. The end of the portion of the mainspring that extends between the first winding body and the second winding body is fixed to the first winding body.
In one embodiment, the mainspring has a first surface and a second surface, and the mainspring is wound around the second winding body with the first surface inside and the second surface inside. Then, the winding body is wound around the first winding body, and the reverse winding preventing element is in close proximity to or in contact with the second surface of the mainspring spring portion.

In one embodiment, the reverse winding prevention element is swingable about a proximal end.
In one embodiment, the reverse winding prevention element comprises a first abutment portion and a second abutment portion.
The first take-up body includes a take-up surface of a spring and peripheral portions that rise from the take-up surface so as to face each other on both sides in the width direction of the take-up surface.
When the mainspring spring exhibits a reverse winding behavior, the reverse winding prevention element swings toward the first winding body side when the portion of the mainspring abuts on the first contact portion, and the second contact portion abuts. It comes into contact with the peripheral portion of the first winding body.
In one embodiment, the width dimension of the first contact portion of the reverse winding prevention element is smaller than the dimension between the peripheral portions of the first winding body, and the first contact portion is between the peripheral edges. It is possible to get in.
In one embodiment, the second winding body includes a winding surface of a spring and peripheral portions that rise from the winding surface in a facing direction on both sides of the winding surface in the width direction.
The width dimension of the reverse winding prevention element is larger than the dimension between the peripheral edges of the first winding body and larger than the dimension between the peripheral edges of the second winding body.

In the present invention, even if the wire is attached in the reverse winding direction of the mainspring of the self-closing device due to a construction error or the like, the reverse winding prevention element regulates the winding in the reverse winding direction, so that the wire is fully closed. When the opening operation is started from the state, it is possible to prevent the failure or damage of parts such as the mainspring.

It is a front view of the sliding door device in a fully closed posture. It is a front view of the sliding door device in a fully open posture. It is a vertical sectional view of a sliding door device. It is a top view which shows the inside of the self-closing device. It is a figure which shows the 2nd winding body and the bracket which supports it. It is a figure which shows the 1st winding body, the 2nd winding body, and the mainspring of a self-closing device, the upper figure is a plan view, and the lower figure is a side view. It is a side view of the first winding body and the reverse winding prevention element, the right figure shows the 1st embodiment of the reverse winding prevention element, and the left figure shows the 2nd embodiment of the reverse winding prevention element. The figure on the left shows the state in which the mainspring is wound around the second winding body (when the sliding door is fully closed), and the figure on the right shows the state in which the mainspring is wound around the first winding body (when the sliding door is fully opened). Is shown.

The configuration of the sliding door device according to the present embodiment will be described with reference to FIGS. 1 to 3. The sliding door device includes a door body composed of a first slide door 1 and a second slide door 2, a door end side vertical frame 3, a door tail side vertical frame 4, a door end side vertical frame 3, and a door tail side vertical frame. An upper frame 5 (see FIG. 3) extending horizontally between the upper ends of 4 is provided. In FIGS. 1 and 2, the front surface of the upper frame 5 is omitted, and only the upper surface 50 provided with the self-closing device 6 described later is shown.

The skeleton to which the sliding door device is attached is formed with notches having an upper end surface 12 and left and right side end surfaces 13 and 14 on three sides, and an opening O is formed from the notches. More specifically, as shown in FIG. 2, the opening O is formed on the upper end surface 12 of the notch portion, the side end surface 13 located on the door tail side of the sliding door, and the side end surface 14 on the door end side of the sliding door. It is an area surrounded by the vertically provided vertical frame 3 on the door end side and the floor surface FL or the ground. FIG. 1 shows a state in which the opening O is closed by the first slide door 1 and the second slide door 2, and FIG. 2 shows the first slide door 1 and the second slide door 2 in a fully open posture on the door tail side. Yes, indicating a state in which the opening O is open.

The skeleton according to the present embodiment includes a sleeve wall portion D1 located on the door tail side of the opening O, and an upper wall portion D2 located above the opening and above the sleeve wall portion D1. .. The door butt side vertical frame 4 is located at the door butt side portion of the sleeve wall portion D1 and the door butt side end portion of the upper wall portion D2, separated from the side end surface 13 on the door butt side of the opening O toward the door butt side. It is provided. The upper frame 5 is provided on the upper wall portion D2 so that the lower end coincides with the upper end surface 12 (see FIG. 3).

In one non-limiting embodiment, the sliding door device according to this embodiment is provided on a hinged door (opening and closing a vehicle opening) of an evacuation communication pit door. When the sliding door device is provided in the hinged door of the evacuation communication pit door, the skeleton (including the sleeve wall portion D1 and the upper wall portion D2) is composed of the hinged door. That is, the opening is a humanitarian opening formed in a hinged door (movable skeleton), and the sliding door device is provided in the hinged door so as to open and close the humanitarian opening.

Two hanger rollers 10 and 10 are provided at the upper end of the first slide door 1 with an interval in the door width direction, and two hangers rollers 10 and 10 are provided at the upper end of the second slide door 2 with an interval in the door width direction. Hanger rollers 20 and 20 are provided. The upper wall portion D2 is provided with a first hanger rail 11 and a second hanger rail 21 located in the upper frame 5. In the illustrated embodiment, the first hanger rail 11 and the second hanger rail 21 extend at different height positions in a stepped manner, but the present invention is not limited to this embodiment.

The first slide door 1 is opened and closed by the hanger roller 10 rolling on the first hanger rail 11, and the first hanger rail 11 is the hanger roller 10 of the first slide door 1. It extends to cover the range of movement. More specifically, the door end side end of the first hanger rail 11 is located at a position corresponding to the hanger roller 10 on the door end side of the first slide door 1 in the fully closed posture, and the first hanger rail 11 The door tail side end is at a position corresponding to the hanger roller 10 on the door tail side of the first slide door 1 in the fully open posture.

The second slide door 2 is opened and closed by the hanger roller 20 rolling on the second hanger rail 21, and the second hanger rail 21 is the hanger roller 20 of the second slide door 2. It extends to cover the range of movement. More specifically, the door end side end of the second hanger rail 21 is located at a position corresponding to the hanger roller 20 on the door end side of the second slide door 2 in the fully closed posture, and the second hanger rail 21 The door tail side end is located at a position corresponding to the hanger roller 20 on the door tail side of the second slide door 2 in the fully open posture.

By opening the first slide door 1 by using the handle H provided on the first slide door 1, the first slide door 1 and the second slide door 2 are opened. For example, when the first slide door 1 slides in the opening direction, the door tail side portion of the first slide door 1 that moves to the door tail side is locked to the door tail side portion of the second slide door 2 in the open posture. , The first slide door 1 and the second slide door 2 are integrally slid in the opening direction to be in the opening posture. The sliding door device includes an automatic closing mechanism that automatically closes the manually opened first slide door 1. When the first slide door 1 slides in the closing direction from the open position by the automatic closing mechanism, the door end side portion of the first slide door 1 that moves to the door end side is the door end of the second slide door 2 in the closed position. It is locked to the side portion, and the first slide door 1 and the second slide door 2 are integrally slid in the closing direction to be in the closed posture.

The sliding door device is a self-closing sliding door device and has an automatic closing mechanism. The automatic closing mechanism includes a wire W, a self-closing device 6 that winds the wire W to move the first slide door 1 (and the second slide door 2) in an open position via the wire W in the closing direction. including. The self-closing device 6 is provided at a position on the door end side of the upper surface 50 of the upper frame 5. A take-up drum 60, which is a take-up portion of the wire W, is provided outside the self-closing device 6, and one end of the wire W is fixed to the take-up drum 60. The self-closing device 6 is provided with a first pulley 60'along with the take-up drum 60, and the wire W horizontally drawn from the take-up drum 60 passes through the first pulley 60'on the door end side. Extends diagonally downward toward the door end, and extends horizontally toward the door end side via the second pulley 7 provided on the door end side portion in the upper frame 5, and the other end of the wire W is in the upper frame 5. It is wound on the winding drum of the winding device 8 provided on the door tail side.

The take-up drum of the take-up device 8 includes means (for example, a spring) for urging the wire W in the direction of taking up the wire W on the take-up drum. The take-up drum 60 of the self-closing device 6 is urged in a direction in which the wire W is taken up by the take-up drum 60. In the present embodiment, the urging force in the winding direction of the winding drum 60 of the self-closing device 6 is larger than the urging force in the winding direction of the winding drum of the winding device 8. The internal mechanism of the self-closing device 6 will be described later.

A protrusion 100 is provided on the bracket of the hanger roller 10 on the door end side of the first slide door 1, and the horizontal portion of the wire W extends through the protrusion 100. The contact body 101 fixed to the wire W is in contact with the door end side portion of the protrusion 100 of the bracket of the hanger roller 10 of the first slide door 1 from the direction toward the door end side, and the first slide door 1 When one end of the wire W is wound around the take-up drum 60 by the self-closing device 6 in the open position of the wire W, the horizontal portion of the wire W moves to the door end side (at this time, the other end side of the wire W). The portion is pulled out from the take-up drum of the take-up device 8), and the abutting body 101 on the wire W moves the projecting portion 100 toward the door end side, so that the hanger roller 10, that is, the first slide door 1 moves toward the door end side (closing direction) and closes the opening O.

When the first slide door 1 in the fully closed position is manually slid to the door tail side (opening direction) against the urging force (force in the direction of winding the wire W) of the self-closing device 6, the hanger roller 10 The protruding portion 100 of the wire W comes into contact with the abutting body 101 on the wire W and moves the wire W to the door tail side, so that the wire W moves to the door tail side while being pulled out from the take-up drum 60 of the self-closing device 6. Then, the portion of the wire W moved to the door tail side is wound by the winding drum of the winding device 8.

The internal structure of the self-closing device 6 will be described with reference to FIG. The self-closing device 6 includes a box-shaped casing, and the casing includes a bottom wall 6A fixed to the upper surface 50 of the upper frame 5, a first wall 6B and a second wall 6C vertically rising from the bottom wall 6A. The space between the first wall 6B and the second wall 6C is an internal space for accommodating the components of the self-closing device 6. The take-up drum 60 and the first pulley 60'are located outside the first wall 6B.

A first shaft 61 and a second shaft 62 are rotatably supported between the first wall 6B and the second wall 6C, respectively. One end of the first shaft 61 protrudes to the outside beyond the first wall 6B, a take-up drum 60 is provided at the protruding portion of the first shaft 61, and the first shaft 61 and the take-up drum 60 are integrated. It is designed to rotate. The first shaft 61 is provided with a first gear 63 located on the second wall 6C side, and the second shaft 62 is provided with a second gear 64 located on the second wall 6C side. Yes, the first gear 63 and the second gear 64 are in mesh. Regarding the relative size of the first gear 63 and the second gear 64, the first gear 63 is a large-diameter gear and the second gear 64 is a small-diameter gear.

The first take-up drum 65 is provided on the second shaft 62, and the first take-up drum 65 rotates integrally with the second shaft 62. The second take-up drum 66 is arranged adjacent to the first take-up drum 65. The first take-up drum 65 and the second take-up drum 66 are winding portions of a spring (which is formed in a spiral shape from a long metal leaf spring) 67. When the sliding door is fully closed, the mainspring 67 is wound around the second winding drum 66. The leaf spring forming the mainspring 67 has a first surface 670 and a second surface 671, and the mainspring 67 is wound around the second take-up drum 66 with the first surface 670 inside. It is wound around the first winding drum 65 with the second surface 671 on the inside (see FIG. 8).

When the first slide door 1 in the fully closed position is opened, the wire W wound around the winding drum 60 is pulled out, so that the winding drum 60, the first shaft 61, the second shaft 62, and the first The take-up drum 65 rotates in the first direction (direction A in the lower figure of FIG. 6 to be described later), and the mainspring 67 wound around the second take-up drum 66 is taken up by the first take-up drum 65. I will go. As the mainspring 67 is wound around the first take-up drum 65, the force to return to the original state (the state taken up by the second take-up drum 66) is stored in the mainspring 67. ..

Therefore, when the handle H is released after the first slide door 1 is in the open position, the first slide door 1 is wound around the first take-up drum 65 after a certain period of time (when the self-closing delay mechanism described later is provided). The mainspring 67 is wound around the second winding drum 66 so as to return to the original posture. When the mainspring 67 is wound around the second take-up drum 66, the first take-up drum 65 rotates in the second direction (the direction B in the lower figure of FIG. 6 described later), and the second axis 62 is in the second direction. Rotate to. The rotational force of the second shaft 62 in the second direction is transmitted to the first shaft 61 via the second gear 64 and the first gear 63, and the first shaft 61 rotates in the second direction to wire. The winding drum 60 of W rotates in the second direction to wind the wire W, and the horizontal portion of the wire W moves toward the door end side, so that the first slide door 1 moves in the closing direction. To do.

The self-closing device 6 according to the present embodiment includes a self-closing delay mechanism so as to hold the fully open state of the opening O for a predetermined time. The self-closing delay mechanism is provided on the first shaft 61 to maintain the pinion 680 that rotates integrally with the first shaft 61, the moving rack 681 meshed with the pinion 680, and the sliding door open state for a predetermined time. It includes a timer mechanism 682, a rotation control lever 683 that regulates the rotation of the second shaft 62, and a ratchet 684 that is provided on the second shaft 62 and rotates integrally with the second shaft 62. The moving rack 681 is movable between the first position and the second position by the rotation of the pinion accompanying the rotation of the first shaft 61. When the sliding door is fully closed (the mainspring 67 is wound around the second take-up drum 66), the moving rack 681 is in the first position, and in conjunction with the opening of the sliding door, it moves from the first position to the second position. When the sliding door is fully opened (the mainspring 67 is wound around the first winding drum 65), the moving rack 681 is in the second position.

When the moving rack 681 moves from the first position to the second position, the rotation control lever 683 rotates downward, and the timer mechanism 682 moves the tip contact portion 6830 upward while rotating downward. It is regulated mechanically. A locking portion 6831 is provided at an intermediate portion in the length direction of the rotation regulating lever 683, and when the rotation regulating lever 683 is rotated downward, the locking portion 6831 is engaged with the ratchet 684 provided on the second shaft 62. By stopping, the rotation of the second axis 62 in the second direction is restricted. When the moving rack 681 moves from the first position to the second position, the timer of the timer mechanism 682 starts, and when the timer ends, the upward rotation restriction of the rotation restricting lever 683 is released, and the locking portion 6831 The locked state between the ratchet 684 and the ratchet 684 is released, and the second shaft 62 can rotate in the second direction. As the second shaft 62 rotates in the second direction, the winding drum 60 of the wire W rotates in the second direction to wind the wire W, and the horizontal portion of the wire W is a door. By moving in the front side direction, the first slide door 1 moves in the closing direction. Such an autism delay mechanism is known, and Patent Document 1 can be referred to for a more detailed explanation.

As shown in FIG. 6, the winding surface of the mainspring 67 in the first winding drum 65 is formed of three plate-shaped elements 650 arranged at intervals in the circumferential direction. Each plate-shaped element 650 is composed of a flat surface 6500 and inclined surfaces 6501 on both sides of the flat surface 6500 in the circumferential direction. One end of the spring 67 is fixed to the flat surface 6500 of one plate-shaped element 650 with a screw or the like. The inclined surface 6501 of each plate-shaped element 650 substantially coincides with the circumferential direction of the first take-up drum 65, and the second surface 671 of the first winding of the mainspring 67 is an inclined surface of each plate-shaped element 650. It comes into contact with 6501. That is, the mainspring 67 is wound around the first winding drum 65 with the second surface 671 inside. The first take-up drum 65 is composed of a take-up surface (three plate-shaped elements 650) and a pair of disk-shaped peripheral edges 651 provided on both sides so as to sandwich the take-up surface. The portion 651 includes a circumferential side edge 652.

As shown in FIG. 5, the second take-up drum 66 is rotatably attached to the shaft 66'via a bearing (not shown), and the shaft 66'is attached to a bracket 9 fixed to the bottom wall 6A. It is supported. The second take-up drum 66 is composed of a take-up surface 660 and a pair of disk-shaped peripheral edges 661 located on both sides so as to sandwich the take-up surface 660, and the peripheral edge portion 661 is on the circumferential side. It has an edge 662. The winding surface 660 is a substantially circumferential surface, but a flat portion 6660 is formed in a part thereof, and the other end of the mainspring 67 is fixed to the flat portion 6660 of the winding surface 660 with a screw or the like. The mainspring 67 is wound around the second winding drum 66 with the first surface 670 inside. In the present embodiment, the width dimensions of the first take-up drum 65 and the second take-up drum 66 (width dimensions of the take-up surface, dimensions between the outer and inner surfaces of the peripheral edges 651 and 652, and the thickness of the side edges 652 and 662). Is the same.

The bracket 9 includes a bottom surface 90 and a pair of side surfaces 91 and 92 that rise vertically from the bottom surface 90 so as to face each other, and the end portions of the shaft 66'in the length direction are supported by the side surfaces 91 and 92, respectively. The second take-up drum 66 is adjacent to the first take-up drum 65, and in the second take-up drum 66, the side closer to the first take-up drum 65 is the front side, and the side far from the first take-up drum 65 is the front side. The rear side. A reverse winding prevention element 93 is provided on the front side portion of the bracket 9 so as to be located between the first winding drum 65 and the second winding drum 66. As shown in FIG. 6, the side edge 652 of the peripheral edge portion 651 of the first take-up drum 65 and the side edge 662 of the peripheral edge portion 661 of the second take-up drum 66 are close to each other, and the reverse winding prevention element 93 is close to each other. It is located in the space below the part.

The reverse winding prevention element 93 according to the present embodiment is a rising plate-like body, and includes a first surface 93A on the first winding drum 65 side and a second surface 93B on the second winding drum 66 side. , The bracket 9 is swingably attached with the lower end as a fulcrum or a center. In the present specification, two embodiments are disclosed as embodiments of the reverse winding prevention element 93. The right figure of FIG. 7 is the first embodiment, and the left figure is the second embodiment. The first embodiment and the second embodiment are different in the contact portion at the upper end portion, and are common in other points. Here, the first embodiment will be described, and the second embodiment will be described later. If the reverse winding prevention element 93 does not substantially affect the operation of the first winding drum 65, the second winding drum 66, and the mainspring 67, the bracket 9 (bottom surface 90) does not swing. And the side surfaces 91, 92) may be fixed or integrated.

The reverse winding prevention element 93 includes a horizontal upper end portion 930 and left and right inclined portions 931 of the upper end portion 930. The width dimension of the reverse winding prevention element 93, specifically, the dimension between the left and right side edges 932 is the width dimension of the first take-up drum 65 (the dimension between the outer surfaces of the peripheral edge portion 651) and the second take-up drum 66. It is larger than the width dimension (dimension between the outer surfaces of the peripheral edge portion 661). The width dimension of the upper end portion 930 of the reverse winding prevention element 93 is the width dimension of the first take-up drum 65 (dimension between the inner surfaces of the peripheral edge portion 651) and the width dimension of the second take-up drum 66 (between the inner surfaces of the peripheral edge portion 661). Dimensions) smaller than. When the upper end portion 930 of the reverse winding prevention element 93 is positioned between the inner surfaces of the peripheral edge portion 651 of the first take-up drum 65, the left and right inclined portions 931 are the side edges 652 of the peripheral edge portion 651 of the first take-up drum 65. It is located so as to face the. When the upper end portion 930 of the reverse winding prevention element 93 is positioned between the inner surfaces of the peripheral edge portion 661 of the second take-up drum 66, the left and right inclined portions 931 are the side edges 662 of the peripheral edge portion 661 of the second take-up drum 66. It is located so as to face the.

Therefore, the upper end portion 930 of the reverse winding prevention element 93 and the portion in the vicinity thereof (the upper end portion of the second surface 93B) are the portions of the mainspring 67 (typically, the first winding drum 65 and the second winding drum 66. It is a first contact portion capable of contacting the portion 67') extending between them. The left and right inclined portions 931 of the reverse winding prevention element 93 and the portion in the vicinity thereof (the upper end portion of the first surface 93A) and the second contact portion capable of contacting the side edge 652 of the peripheral portion 651 of the first winding drum 65. It has become. When the mainspring 67 is wound around the first take-up drum 65 and the winding diameter is increased, the mainspring 67 may come into contact with the upper end portion of the first surface 93A of the reverse winding prevention element 93.

The configuration of the swing of the reverse winding prevention element 93 of the present embodiment will be described. Left and right projecting pieces 933 are projected within the plate thickness at the lower ends of the left and right side edges 932 of the reverse winding prevention element 93. Square notches 911 and 921 (see FIG. 5) are formed at the lower ends of the front surfaces of the side surfaces 91 and 92 of the bracket 9, and the front ends of the bottom surface 90 do not reach the notches 911 and 921. The width of the reverse winding prevention element 93 is substantially the same as the dimension between the inner surfaces of the side surfaces 91 and 92 of the bracket 9, and the reverse winding prevention element 93 cuts the left and right projecting pieces 933 at the lower end and the lower ends of the side surfaces 91 and 92. It is located in 911 and 921 and is provided on the bracket 9. The projecting piece 933 at the lower end of the reverse winding prevention element 93 is located in the notches 911 and 921 at the lower ends of the side surfaces 91 and 92 with play, and the reverse winding prevention element 93 can swing with the lower end as a fulcrum. ing. The swingable configuration of the reverse winding prevention element 93 is not limited to the above embodiment. For example, it may be rotatably supported via the shaft at the lower end of the reverse winding prevention element 93. Alternatively, the reverse winding prevention element 93 may be formed from an elastic member (leaf spring material) having L-shaped rigidity from the rising portion and the bottom surface portion so that the rising portion can swing with respect to the bottom surface portion by elasticity.

The reverse winding prevention element 93 according to the present embodiment cannot stand on its own, and when the sliding door is fully closed (the state in which the mainspring 67 is wound around the second winding drum 66), the lower end is used as a fulcrum and the element 93 is slightly tilted to the rear side. The upper end portion 930 abuts on the second surface 671 of the portion 67'of the mainspring spring 67, and / or the left and right inclined portions 931 are side edges 652 of the peripheral portion 651 of the first take-up drum 65. (Fig. 6, lower figure).

When the sliding door starts to open when the sliding door is fully closed, the first take-up drum 65 starts rotating in the first direction (direction A in the lower figure of FIG. 6), and the portion 67'of the mainspring 67 bulges forward. The reverse winding prevention element 93 moves so as to be pulled upward (moves so as to escape from the upper end portion 930 of the reverse winding prevention element 93 to the rear side), and the reverse winding prevention element 93 is tilted so as to fall further to the rear side with the lower end as a fulcrum. Then, the upper end portion 930 is in contact with the portion 67'of the mainspring 67, and / or the left and right inclined portions 931 are in contact with the side edge 662 of the peripheral edge portion 661 of the second take-up drum 66 (FIG. 8 Left figure).

Further, when the first take-up drum 65 rotates in the first direction and the mainspring 67 is taken up by the first take-up drum 65, the mainspring 67 is pulled out from the second take-up drum 66. The diameter of the mainspring 67 wound around the second take-up drum 66 is reduced, and the inclined portion 931 of the reverse winding prevention element 93 is attached to the side edge 662 of the peripheral portion 661 of the second take-up drum 66. The upper end portion 930 of the reverse winding prevention element 93 and the portion 67'of the mainspring spring 67 are separated from each other while being in contact with each other and maintaining the tilted state. When the sliding door is fully opened, the state shown on the right in FIG. 8 is obtained.

When the sliding door starts to close when the sliding door is fully opened, the first take-up drum 65 rotates in the second direction, and the mainspring 67 is pulled out from the first take-up drum 65 and wound around the second take-up drum 66. The diameter of the mainspring 67, which is taken up and taken up by the second take-up drum 66, is increased, and when the sliding door is fully closed, the state shown in the lower part of FIG. 6 is obtained.

When the sliding door is opened from when the sliding door is fully closed, the upper end portion 930 of the reverse winding prevention element 93 and the portion 67'of the mainspring spring 67 can come into contact with each other, but the reverse winding prevention element 93 swings in the direction of escaping from the portion 67'of the mainspring spring 67. Since it is movable, the reverse winding prevention element 93 can be used for pulling out the mainspring 67 from the second winding drum 66 and winding it to the first winding drum 65 as the first winding drum 65 rotates in the first direction. Does not affect. In the process of closing the sliding door from the time when the sliding door is fully opened, the reverse winding prevention element 93 does not come into contact with the portion 67'of the mainspring 67. The inclined portion 931 of the reverse winding prevention element 93 may come into contact with the side edge 662 of the peripheral edge portion 661 of the second winding drum 66, but the reverse winding prevention element 93 swings in a direction to escape from the side edge 662 of the second winding drum 66. Since it is movable, the reverse winding prevention element 93 can be used for winding the mainspring 67 to the second winding drum 66 and pulling it out from the first winding drum 65 as the second winding drum 66 rotates in the second direction. Does not affect.

The lower figure of FIG. 6 corresponds to the fully closed state of the opening, and the second take-up drum 66 is located diagonally downward on the rear side of the first take-up drum 65 and is taken up by the second take-up drum 66. The spring 67 is pulled out from the lower side of the second take-up drum 66 to the front side and upward, and is taken up from the upper side of the first take-up drum 65. In the lower figure of FIG. 6, the first rotation direction of the second shaft 62 and the first take-up drum 65 is indicated by an arrow A, and the second rotation direction is indicated by an arrow B. Similarly, the first rotation direction of the first axis 61 is indicated by an arrow A, and the second rotation direction is indicated by an arrow B. When the sliding door starts to open, the first shaft 61 and the second shaft 62 rotate in the first direction (A direction), and the first direction (A direction) is the normal winding direction.

Here, when the sliding door is installed, if one end side of the wire W is fixed to the winding drum 60 so as to be wound in the wrong direction, the sliding door starts to open, so that the first shaft 61 becomes the second. The second shaft 62 and the first take-up drum 65 rotate in the second direction (B direction) in conjunction with the rotation in the direction. In the state shown in the lower part of FIG. 6, the rotation of the first take-up drum 65 in the B direction is such that the portion 67'of the mainspring 67 is pulled under the first take-up drum 65. Then, since the upper end 930 of the reverse winding prevention element 93 is close to or in contact with the second surface 671 of the mainspring 67 portion 67', when the behavior of the mainspring 67 in the reverse winding direction is shown, the portion of the mainspring 67 The second surface 671 of 67'(for example, FIG. 6 showing a state in which the mainspring 67 is wound around the second take-up drum 66. In the aspect shown in the figure below, in the portion 67'of the mainspring 67, the first take-up drum 65 The upper end portion 930 of the reverse winding prevention element 93 abuts and stretches against the plate-shaped element 650 (position below the portion fixed to the plate-shaped element 650) to prevent the reverse winding of the mainspring 67. At this time, since the reverse winding prevention element 93 can swing with the lower end as a fulcrum, it can swing toward the first take-up drum 65, but the inclined portions 931 on both sides of the reverse winding prevention element 93 are the peripheral edges of the first take-up drum 65. By abutting on the side edge 652 of the portion 651, the swing can be stretched in a restricted posture. Further, if the mainspring 67 behaves in the reverse winding direction when the opening operation is started from the fully closed state of the sliding door, the winding of the mainspring 67 is restricted by the reverse winding prevention element 93 and the sliding door does not open, so that the sliding door does not open. Therefore, it can be recognized that one end side of the wire W is fixed to the winding drum 60 in the wrong direction.

In the state shown in the lower part of FIG. 6, in order to satisfactorily prevent the pull-in of the mainspring 67 portion 67'when the first take-up drum 65 tries to rotate in the B direction, the upper end portion 930 of the reverse winding prevention element 93 is used. It is advantageous that the clearance C with the winding surface of the first winding drum 65 (the inclined surface 6501 of the plate-shaped element 650) is small. The upper end of the reverse winding prevention element 93 is composed of a horizontal upper end portion 930 and left and right inclined portions 931 so that the upper end portion 930 can enter the space between the left and right peripheral edges 651 of the first take-up drum 65. Therefore, the clearance C can be reduced. On the other hand, if the clearance C is reduced, when the reverse winding prevention element 93 is tilted to the rear side, the upper end portion 930 is likely to come into contact with the portion 67'of the mainspring spring 67, but the reverse winding prevention element 93 is tilted to the rear side. When tilted in this way, the portion near the left and right inclined portions 931 to the inclined portion 931 (the upper end portion of the second surface 93B) abuts on the side edge 662 of the peripheral portion 661 of the second winding drum 66 to prevent reverse winding. Excessive tilting of the element 93 to the rear side is regulated (in the right figure of FIG. 8, the upper end portion 930 of the reverse winding prevention element 93 does not contact the portion 67'of the mainspring spring 67).

The left figure of FIG. 7 shows a second embodiment of the reverse winding prevention element 93. The reverse winding prevention element 93 includes a horizontal upper end portion 930 and left and right step portions 931'of the upper end portion 930. In the description of the reverse winding prevention element 93 according to the first embodiment, the above-mentioned description can be incorporated by replacing the inclined portion 931 with the step portion 931'. Further, in the embodiment shown on the left of FIG. 7, the height position of the upper end portion 930 is higher than that of the embodiment shown on the right of FIG. 7, so that the clearance C is smaller.

As shown in FIG. 5, a U-shaped reinforcing element 94 in a plan view is fixed to the rear portion of the bracket 9 according to the present embodiment from the side surfaces 941 and 942 facing the rear surface 940. The side surfaces 941 and 942 of the reinforcing element 94 are provided so as to overlap the rear portions of the side surfaces 91 and 92 of the bracket 9, and the side surfaces 941 and 942 are formed with a holding portion of the shaft 66', and the side surface 91 is formed. , 92 and the holding portions of the side surfaces 941 and 942 fix the end portion of the shaft 66'in the length direction. The support structure of the shaft 66'of the second take-up drum 66 is not limited to the illustrated mode. The second take-up drum 66 fits in the space between the side surfaces 91, 92 of the bracket 9 (and the side surfaces 941, 942 of the reinforcing element 94). The horizontal edges of the upper ends of the side surfaces 91 and 92 of the bracket 9 and the upper ends of the side surfaces 941 and 942 of the reinforcing element 94 coincide with each other, and the upper portion of the second take-up drum 66 partially includes the bracket 9 (including the reinforcing element 94). ) Is located above the upper end. The front sides of the side surfaces 91 and 92 of the bracket 9 have downward inclined edges 910 and 920, and the inclined edges 910 and 920 are located in the vicinity of the side edge 652 of the peripheral edge portion 651 of the first take-up drum 65. The upper portion of the reverse winding prevention element 93 extends upward from the inclined edges 910 and 920. In the mainspring 67, the portion 67'extending between the first take-up drum 65 and the second take-up drum 66 is located above the inclined edges 910 and 920 in the front view.

1 1st slide door 3 2nd slide door 6 Self-closing device 65 1st take-up drum (1st take-up body)
650 plate-shaped element (winding surface)
651 Peripheral part 66 2nd winding drum (2nd winding body)
660 Winding surface 661 Peripheral part 67 Wind-up spring 67'Spring part 93 Reverse winding prevention element 930 Upper end (first contact part)
931 Inclined part (second contact part)
931'Step part (second contact part)
933 Projection piece (base end)
93A First surface of reverse winding prevention element (upper end part and both side parts are second contact parts)
93B Second surface of reverse winding prevention element (upper end is the first contact part)
A 1st direction B 2nd direction (reverse winding)

Claims (6)

The first take-up body that rotates in the first direction in conjunction with the opening movement of the sliding door and rotates in the second direction when the sliding door is closed.
The second winding body arranged adjacent to the first winding body and
The mainspring that is wound around the second winding body when the sliding door is fully closed,
With
The spring is pulled out from the second winding body and wound around the first winding body according to the rotation of the first winding body in the first direction.
The sliding door is self-closing, which is provided with a reverse winding prevention element that prevents the reverse winding of the mainspring spring by abutting the portion of the spring between the first winding body and the second winding body. apparatus. The portion of the mainspring is a portion of the mainspring that extends between the first winding body and the second winding body.
The self-closing device for a sliding door according to claim 1. The reverse winding prevention element can swing around the base end portion.
The self-closing device for a sliding door according to any one of claims 1 and 2. The reverse winding prevention element includes a first contact portion and a second contact portion.
The first take-up body includes a take-up surface of a spring and peripheral portions that rise from the take-up surface so as to face each other on both sides in the width direction of the take-up surface.
When the mainspring spring exhibits a reverse winding behavior, the reverse winding prevention element swings toward the first winding body side when the portion of the mainspring abuts on the first contact portion, and the second contact portion abuts. Abuts on the peripheral edge of the first winding body,
The self-closing device for a sliding door according to claim 3. The width dimension of the first contact portion of the reverse winding prevention element is smaller than the dimension between the peripheral portions of the first winding body, and the first contact portion can enter between the peripheral edges. is there,
The self-closing device for a sliding door according to claim 4. The second winding body includes a winding surface of a spring and peripheral portions that rise from the winding surface in a facing manner on both sides in the width direction of the winding surface.
The width dimension of the reverse winding prevention element is larger than the dimension between the peripheral edges of the first winding body and larger than the dimension between the peripheral edges of the second winding body.
The self-closing device for a sliding door according to any one of claims 4 and 5.

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