JP2000160925A - Sag removing device for wire in closer of sliding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a breakage accident of a wire by exciting a wire drum in the pulling direction of the wire, and setting this exciting force smaller than the wire pulling force of the closer of a sliding door. SOLUTION: A torsion coil spring 17 is wound on a spindle 15 rotatably journalling a wire drum 9. The elastic force of the torsion coil spring 17 urges the wire drum 9 ccw. A wire shaft 19 is fitted to the prescribed angle position of a pair of flanges 12 formed on the outer periphery of the wire drum 9 to connect them. The wire shaft 19 is relatively rotatably coupled with an annular terminal 21 fitted to the lead end of a wire 1. When the wire 1 sags, the wire drum 9 is rotated ccw, and the lead end of the wire 1 is wound to remove the sag. The terminal 21 is relatively rotated as the wire shaft 19 is displaced, and the bending moment applied to the wire 1 is automatically resolved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing slack of a wire in a closer of a sliding door (hereinafter, simply referred to as a slack removing apparatus). The present invention relates to a slack removing device which is rational and eliminates a breakage accident of a wire.

[0002]

2. Description of the Related Art The present applicant has previously filed Japanese Patent Application No. 10-1405.
No.36 proposed a new sliding door closer.

As shown in FIG. 1, the closer of the sliding door is provided with a door fastening device 2 configured to pull in the wire 1 at a constant speed, for example, on a sliding door 3, and the drawer end of the wire 1 is removed from the slack removing device. 4 and hooked to the door frame 5 of the sliding door.

As shown in FIG. 2, the door tightening device 2 includes a known constant tension hoisting device 6 having a built-in spring, a speed increasing device 7, and a one-way built in the speed increasing device 7. Clutch and eddy current brake 8 connected to gearbox 7
And

When the sliding door 3 is opened as shown in FIG. 1, the mainspring spring in the constant tension hoisting device 6 is tightened. When a person releases his / her hand from the sliding door after passing through the door, the spring is released. The wire 1 is automatically drawn in the closing direction (left side in FIG. 1) because the wire 1 is pulled into the door fastening device 2 by the elasticity released.

At this time, since the sliding door moves while being buffered by the action of the eddy current brake, it is possible to prevent the sliding door 3 from colliding with the door frame 5 when the sliding door is closed to generate vibrations and noise.

The above-mentioned wire is not limited to a stranded wire of a thin steel wire in the ordinary sense, but includes a thin string of synthetic resin, a thin metal chain, and the like.

However, when the sliding door is moved in the closing direction after a person has passed through the door, the sliding door is forcibly moved in the closing direction. Since the braking is applied and the wire 1 cannot be pulled in following the movement of the sliding door, the wire 1 may be slackened.

In order to remove the slack, the sliding door closer proposed by the applicant of the present invention employs a slack removing device, which is basically a wire winding drum having a built-in spring.

In this slack removing device, for example, as shown in FIG. 3, a pull-out end of a wire 1 having a stopper 11 at its tip is sandwiched between outer peripheral surfaces of a wire drum 9 by a wire holder 13 fixed to a flange 12 of the wire drum. To fix to the wire drum 9.

The wire drum 9 is urged counterclockwise by a torsion coil spring or a spring having a smaller elasticity than the spring of the built-in constant tension winding device 6.

In a normal state in which no slack is generated in the wire 1, the wire 1 passes through the rotation axis of the wire drum 9 as shown in FIG.
When the wire drum 9 is circumscribed (see FIG. 2), the wire drum 9 assumes a stable angular position where no rotational moment occurs, and this stable angular position is uniquely determined even if the wire drum 9 does not have a built-in stopper.

On the other hand, if the wire 1 sags as described above, the wire drum 9 having a smaller inertia resistance and a lighter weight than the constant tension winding device 6 which drags a large inertia resistance and a magnetic resistance. Moves quickly, and as shown in FIG. 4, the wire 1 corresponding to the slack is wound around the wire drum 9 to remove the slack.

[0014]

The slack removing device having the above-described structure, of course, exhibits its intended function. However, as shown in FIG. 3, the wire 1 is bent at a corner of the wire holder 13 with a large curvature. Therefore, there is an inconvenience that this portion is broken and acted on by a relatively small number of operations.

An object of the present invention is to provide a slack removing apparatus which solves the above-mentioned inconvenience and does not cause a wire breakage accident.

[0016]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is mounted on one of a sliding door and a door frame of the sliding door so as to be rotatable about a rotation axis perpendicular to a sliding door running surface. A wire drum with a flange, a wire shaft mounted to connect the flange at a predetermined angular position of the wire drum, and a wire of a closer of a sliding door having an annular terminal fitted to the wire shaft at a drawer end. And urges the wire drum in the direction of pulling the wire, and sets the urging force to be smaller than the force of pulling the wire of the closer of the sliding door.

[0017]

FIG. 5 shows an embodiment of the present invention.
This will be described with reference to FIGS. In these figures, reference numeral 9 denotes a wire drum with a flange 12, and this wire drum 9 is rotatably supported by a support shaft 15 screwed to the door frame 5, as shown in FIG.

The wire drum 9 is prevented from coming off by a holding screw 16 which is screwed with a female thread formed at the tip of the support shaft 15.

Further, the torsion coil spring 1 is mounted on the support shaft 15.
7 is wound, and one end of the torsion coil spring 17 is bent inward and is engaged with a slit 18 formed on the outer peripheral surface of the tip end of the support shaft 15 (see FIG. 6).

Further, the other end of the torsion coil spring 17 is engaged with a spring hooking hole (not shown) formed in the wire drum 9. Energized clockwise.

On the other hand, as shown in FIGS. 6 and 7, a pair of flanges 12 are formed on the outer peripheral portion of the wire drum.
A wire shaft 19 is mounted at a predetermined angular position so as to interconnect them.

The wire shaft 19 in the illustrated embodiment has small-diameter steps formed at both ends, and the small-diameter portions are inserted from the inside into small holes (not shown) formed in the flange, and then are inserted from the outside. Close and fix.

As shown in FIGS. 6 and 7, the wire shaft 19 is connected to an annular terminal 2 attached to the leading end of the wire 1.
1 and so as to be relatively rotatable.

The wire drum 9, including the conventional slack removing device shown in FIGS. 3 and 4, can be covered with an appropriate outer box to improve the appearance of the device.

The spring for urging the wire drum 9 may be a spring instead of the torsion coil spring 17.

In the slack removing apparatus according to the present invention having the above-described configuration, the rotation center of the wire drum 9 and the wire shaft 19 are connected as shown in FIGS. The line extends along the wire 1 and has a positional relationship circumscribing the guide pulley 14 (see FIG. 2).

In this normal state, the rotational moment with respect to the wire drum 9 becomes zero, and this positional relationship is maintained during the operation of the door device 2 thereafter.

At this time, as is apparent from the figure, the terminal 21 attached to the tip of the wire 1 is connected to the wire shaft 1.
Since there is no bending moment acting on the wire 1 because the wire 1 is rotatably fitted to the wire 9, the wire 1 is stretched straight and no excessive force is applied.

On the other hand, when the wire 1 becomes slack, as shown in FIG. 8, the wire drum 9 rotates counterclockwise to wind up the drawn end of the wire 1 and remove the slack.

At this time, the terminal 21 relatively rotates with the deflection of the wire shaft 19, and the bending moment acting on the wire 1 is automatically canceled. As a result, no bending moment is generated in the wire 1. The wire 1 is naturally wound around the outer peripheral surface of the wire drum 9.

FIG. 8 shows a transitional state of the slack removing device. The constant tension hoisting device 6 of the door fastening device 2 having a larger pulling force than the slack removing device in a short time. The slack removing device returns to the normal state shown in FIGS.

[0032]

As is apparent from the above description, according to the present invention, a wire shaft is mounted so as to connect a flange at a predetermined angular position of a wire drum, and an annular shape mounted on the wire shaft at a wire withdrawal end. Since the terminals are rotatably fitted, the bending moment acting on the wire is eliminated by the relative rotation between the wire shaft and the annular terminal, and there is no bending moment acting on the wire. The present invention has the desired effect of providing a slack removing device that does not cause any slack.

[Brief description of the drawings]

FIG. 1 is a diagrammatic front view of a sliding door showing the state of attachment of a sliding door closer proposed by the present applicant.

FIG. 2 is a partial cross-sectional front view of the door fastening device.

FIG. 3 is a front view showing an example of a conventional slack removing device;
This indicates a normal state in which no slack has occurred in the wire.

FIG. 4 is a front view showing an example of a conventional slack removing device.
5 shows a state in which the slack generated in the wire is wound up.

FIG. 5 is a front view of the slack removing device according to one embodiment of the present invention, showing a normal state in which no slack is generated in the wires.

FIG. 6 is a partial sectional front view thereof.

FIG. 7 is a partial cross-sectional plan view of a slack removing device according to an embodiment of the present invention.

FIG. 8 is a partial cross-sectional front view of the slack removing device similar to FIG. 6, showing a state in which a slack generated in a wire is wound up.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire 2 Door fastening device 3 Sliding door 4 Slack removing device 5 Door frame 9 Wire drum 12 Flange 15 Support shaft 17 Torsion coil spring 19 Wire shaft 21 Terminal

Claims (1)

[Claims] 1. A sliding door and one of a sliding door frame and a sliding door,
A flanged wire drum supported so as to be rotatable about a rotation axis perpendicular to the sliding door running surface; a wire shaft mounted to connect the flange at a predetermined angular position of the wire drum; A wire of a sliding door closer equipped with an annular terminal fitted with the shaft, for urging the wire drum in the direction of pulling the wire, and setting the urging force to be smaller than the force of pulling in the wire of the closer of the sliding door. A slack removing device for a wire in a closer of a sliding door.