JPH07259425A - Closing device for sliding door - Google Patents

Abstract

PURPOSE:To adjust the accumulated exciting force according to sliding doors of different weights. CONSTITUTION:A closing device for sliding door is provided with, in its case 6, a power spring 8 of which one end is fixed to a pivot shaft 7, a drum 9 which incorporates the power spring 8 and to which the other end of the power spring 8 is fixed, and a cable body 10 of which one end is anchored to the drum 9 and which is wound on it. Also the pivot shaft 7 is provided with a head part which is projected from one side plate 11 of the case 6, and also a section which is provided with multiple faces 13 formed in polygon and in parallel with the axis of the pivot shaft 7. Then a rotating stopper plate 19 which is formed by bending a wire material made of metal in U-shape at its center is installed on the external surface of one side plate 11 of the case 6. The head of the pivot shaft 7 is held by a linear part 19b adjacent to the bent part 19a at the center of the rotating stopper spring 19 to stop the rotation of the pivot shaft 7 by the exciting force of the power spring 8. In addition, a minus (-) groove 17 which enables the engagement of a jig such as a driver, etc., is installed in the head of the pivot shaft 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door closing device for automatically closing an opened sliding door.

[0002]

2. Description of the Related Art As a sliding door closing device for automatically closing a conventionally opened sliding door, a drum which is rotated by a mainspring is provided in a case, and one end of a cord or the like such as a wire is connected to the drum. The mainspring spring is energized by the rotation of the drum at the same time as the cord is drawn out from the drum by opening the sliding door and the drum is rotated by the energizing force of the mainspring spring by releasing the hand from the opened sliding door. It is known that the sliding door is rotated in the opposite direction and the cord is wound around the drum to automatically close the sliding door.

[0003]

However, in the closing device having such a structure, it is not possible to adjust the stored force of the mainspring spring according to the weight of the sliding door, and the same closing device is set in the sliding doors having different weights. In the case of a sliding door with a light weight, the spring force of the mainspring spring is too strong, and the sliding door closes vigorously at a fast speed. There was a problem that the sliding door closed.

The present invention solves such a problem, and an object of the present invention is to provide a closing device for a sliding door which can adjust the stored force of the mainspring according to the sliding door having a different weight. To do.

[0005]

In order to solve this problem, the present invention is a closing device for a sliding door for urging the sliding door in the closing direction, the mainspring having one end locked to a spindle in a case. A spring, a drum that incorporates the mainspring spring and locks the other end of the mainspring spring, and a cord-shaped body such as a wire that is wound around the drum by connecting one end to the drum are provided, and the spindle is provided from one side plate of the case. It has a projecting head portion, and this head portion is provided with a portion having a number of surfaces formed in a polygonal shape and parallel to the axis of the support shaft. A detent spring formed by bending into a U-shape is provided, and the head portion of the support shaft is sandwiched by a straight line portion adjacent to the central bent portion of the detent spring, and the straight line portion is provided with the plurality of surfaces. With a spring spring Configured to stop the rotation of the support shaft by the force, in which further a jig such as a screwdriver into the head of the support shaft and engageable.

[0006]

With this structure, a jig such as a screwdriver is engaged with the head of the support shaft to rotate the support shaft clockwise or counterclockwise against the pressure contact force of the straight portion of the detent spring. Thus, it is possible to easily adjust the power storage force of the mainspring according to the sliding doors having different weights.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5, reference numeral 1 denotes an opening 2 of a building formed by left and right vertical frames 2a and 2b and an upper frame 2c.
This is a sliding door provided inside, and the sliding door 1 is configured such that a hanging roller 3 provided at an upper end is horizontally slidable on a rail 4 horizontally provided below the upper frame 2c. A closing device 5 is attached to one side of the upper end of the opening 2. The closing device 5 includes a mainspring spring 8 having one end locked to a support shaft 7 in a case 6, and the mainspring spring 8.
A drum 9 that has a built-in spring and locks the other end of the mainspring 8;
The drum 9 is provided with a cord 10 such as a wire whose one end is connected and wound, and the cord 10 is pulled to pull the cord 10.
When the drum spring 9 is fed from the drum 9, the mainspring spring 8 is tightened by the rotation of the drum 9 to store energy, and the tension force of the cord 10 is released to store the cord. The drum 9 rotates in the direction opposite to the direction in which the body 10 is extended, and the cord 9 is attached to the drum 9.
Is to be wrapped around. The other end of the cord 10 projecting from the case 6 of the closing device 5 is connected to the upper end of the sliding door 1.

By the way, the support shaft 7 has a head portion projecting from one side plate 11 of the case 6, and the head portion has a circular flange portion 12 from the end face side and a flange portion adjacent to the flange portion 12. 12 is formed in a regular hexagonal shape that does not project outward from 12 and has a step portion 14 having six surfaces 13 parallel to the axis of the support shaft 7, and is connected to the step portion 14 to connect the case 6
A groove 16 for locking one end of the mainspring 8 is formed in a cylindrical shaft portion 15 located inside. In addition, a groove 17 is formed in the center of the surface of the flange 12 so that a jig such as a driver can be engaged with the groove.

Reference numeral 18 denotes a mounting metal fitting for mounting the detent spring 19 of the support shaft 7 on the outer surface of the one side plate 11 of the case 6, and a groove for engaging both ends of the detent spring 19 with the inner surface thereof. 20 has a groove 20 to prevent rotation
Both ends of the detent spring 19 are sandwiched between the outer surface of the one side plate 11 of the case 6 in a state where both ends of the detent 19 are engaged, and the both ends are fixed to the case 6 with screws 21. The detent spring 19 is formed by bending a wire rod made of metal such as stainless steel into a U shape at the center.
The linear portion 19b adjacent to 19a, the step portion 14 of the support shaft 7 at 19b.
And the straight portions 19b and 19b are the six surfaces of the step portion 14 of the support shaft 7.
Two of the surfaces 13 are pressed against each other, and the rotation of the support shaft 7 due to the biasing force of the mainspring 8 is stopped. That is, unless the rotation of the support shaft 7 is stopped, it is not possible to store a force in the mainspring spring 8. Therefore, the straight portions 19b, 19b of the rotation stopping spring 19 are connected to the two surfaces of the stepped portion 14 of the support shaft 7. It is pressed against 13 and the rotation of the support shaft 7 is stopped. By the way, when adjusting the stored force of the mainspring 8 according to the sliding doors 1 having different weights, the minus groove of the flange portion 12 of the support shaft 7 is used.
A jig such as a screwdriver is engaged with 17 to rotate the support shaft 7 clockwise or counterclockwise in a straight portion of the spring 19 for preventing rotation.
It is possible by rotating against the pressure contact force of 19b, 19b.

In the above structure, the sliding door 1 has the closing device 5
Is connected to the other end of the cord 10 projecting from the case 6, and the cord 10 is paid out from the drum 9 by moving the sliding door 1 in the opening direction, whereby the mainspring 8 is stored by the rotation of the drum 9. The drum 9 is rotated in the opposite direction to that when the cord 10 is fed out by releasing the pulling force of the cord 10 by releasing the hand of the sliding door 1 which is biased and opened. , Cord 10 on drum 9
Is wound and the sliding door 1 is automatically closed.

[0011]

As described above, according to the present invention, a jig such as a driver is engaged with the head of the support shaft to press the support shaft clockwise or counterclockwise against the straight portion of the detent spring. By rotating against the force, it is possible to easily adjust the stored force of the mainspring according to the sliding doors having different weights.

[Brief description of drawings]

FIG. 1 is a front view showing an attached state of a sliding door according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the closing device.

FIG. 3 is a perspective view of the detent spring attachment fitting seen from the back surface.

FIG. 4 is a perspective view of the closing device.

FIG. 5 is a sectional view of the closing device.

[Explanation of symbols]

 1 Sliding door 2 Opening 5 Closing device 6 Case 7 Spindle 8 Spring 8 Spring 10 Drum 10 Cord 11 One side plate 12 Flange 13 Face 14 Step 15 Shaft 16 Groove 17-Groove 18 Mounting bracket 19 Anti-rotation spring 19a Bent part 19b Straight part 20 Groove 21 Screw

Claims (1)

[Claims] 1. A closing device for a sliding door for urging the sliding door in a closing direction, wherein a mainspring spring having one end locked to a spindle in a case and the other end of the mainspring spring incorporating the mainspring spring. A drum to be locked and a cord-shaped body such as a wire which is wound around the drum by connecting one end to the drum are provided, and the support shaft has a head projecting from one side plate of the case, and the head has a polygonal shape. A detent spring formed by bending a U-shaped wire rod made of metal at the center on the outer surface of the one side plate of the case, which has a portion having a number of surfaces parallel to the axis of the support shaft. A head portion of the spindle is sandwiched by a linear portion adjacent to the central bent portion of the detent spring, and the linear portion is pressed against any of the plurality of surfaces to support the spindle by the urging force of the mainspring. Configured to stop the rotation of A sliding door closing device characterized in that a jig such as a driver can be engaged with the head of the supporting shaft.