JPH11117647A - Locking device for overhead door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow smooth locking and unlocking and to enhance durability. SOLUTION: A lock hardware receiver 19 is provided on a guide rail 1, a lock hardware 30 is pivoted to a door main body 3, and a roller 32 freely rotationally provided at the lock 30 can be removably fitted into the lock receiver 19. The lock 30 can be rotated by means of an unlocking handle. Since the lock receiver 19 and the roller 32 make rolling contact with each other, removably fitting operations become smoother, leading to reduce wear and noise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an overhead door locking device.

[0002]

2. Description of the Related Art An overhead door and a conventional overhead door locking device will be described with reference to FIGS.

A guide rail 1 is provided along both side pillars and a ceiling surface of an entrance, and a door body 2 is slidably provided on the guide rail 1. The door body 2 has a horizontally elongated strip-shaped panel 3 connected to the door body 2 via a hinge 4 so as to be freely bent.
The door body 2 is locked to the guide rail 1 in a closed state.

In FIG. 1, reference numeral 6 denotes a balance spring, which urges the door body 2 upward through a wire 7.

The locking device 5 has an unlocking handle 8 provided at the lower center of the door main body 2 and lock portions 9 provided at both ends of the lower part of the door main body 2. The lock portion 9 is connected to the lock portion 9 by a wire 10 so that the lock portion 9 can be unlocked by rotating the unlock handle 8 by a required angle.

Hereinafter, the lock section 9 will be described.

A lock member 17 is rotatably provided on a bracket 15 fixed to the width end of the panel 3 via a vertical shaft 16. The lock fitting 17 has an engaging tongue piece 18 extending in parallel with the panel 3, and the engaging tongue piece 18 can be engaged with a lock fitting receiver 19 (described later) fixed to the guide rail 1. is there. A spring 20 is fitted on the vertical shaft 16, and the spring 20 urges the lock member 17 in a direction in which the lock member 17 engages with the lock member receiver 19.

The lock fitting receiver 19 is formed with a concave portion 21 with which the engaging tongue piece 18 is engaged, and the engaging tongue piece 18 is removably fitted in the concave portion 21. The mounting position 19 faces the bracket 15 with the door body 2 closed.

One end of the wire 10 is engaged with the lock member 17 via a hook 23. The unlocking handle 8 is rotatably attached to the panel 3, and a link plate 24 is fixed to the unlocking handle 8, and the other end of the wire 10 is fixed to the link plate 24. In FIG. 6, reference numeral 25 denotes a roller shaft fixed to the panel 3, and 26 denotes a guide roller rotatably provided on the roller shaft 25 and rolling on the guide rail 1.

When the door body 2 is closed, the engaging tongue piece 18 is engaged with the recess 21 and the door body 2 is locked.

When the door body 2 is opened, the unlocking handle 8 is rotated to unlock the door. The rotation of the unlocking handle 8 pulls the wire 10 toward the center of the door main body 2 via the link plate 24, and the lock member 17 rotates counterclockwise in FIG. 18 is detached from the lock fitting receiver 19, and the door body 2 can be lifted.

When the door body 2 is lowered when the door body 2 is closed, the engaging tongue piece 18 rides on the lock fitting receiver 19, and the restoring force of the spring 20 at the closed position of the door body 2. As a result, the door body 2 is locked.

[0013]

In the conventional locking device for an overhead door, since the engaging tongue piece 18 and the lock fitting receiver 19 are slid during locking, abrasion occurs or rust occurs. As a result, the frictional resistance between the engaging tongue piece 18 and the lock bracket receiver 19 increases, the closing operation of the door body 2 becomes heavy, and in some cases, the engaging tongue piece 18 may be distorted.

Further, when the door body 2 is closed when the door is unlocked, the engaging tongue piece 18 and the lock bracket receiver 19 may be in strong contact with each other. May be. When the unlocking handle 8 is operated with a large force, the wire 10 may extend over time, and the unlocking handle 8 may rattle.

The present invention has been made in view of the above circumstances, and aims to smoothly perform unlocking and unlocking, and to further improve durability.

[0016]

According to the present invention, a lock bracket is provided on a guide rail side, a lock bracket is pivotally mounted on a door body side, and a roller rotatably provided on the lock bracket is provided on the lock bracket receiver. The present invention relates to a locking device for an overhead door which is capable of being fitted and removed, and wherein the lock fitting is rotatable by an unlocking handle. Since the lock fitting receiver and the roller come into rolling contact with each other, the fitting and removal become smooth, and wear and sound are generated. Reduce.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, the same components as those shown in FIGS. 4 to 6 are denoted by the same reference numerals, and description thereof will be omitted.

A bracket 15 is fixed to the width end of the panel 3, and a lock fitting 30 bent and formed in a U-shape is pivotally connected to the bracket 15 via a vertical shaft 16. A pin 31 is erected on the lock fitting 30, and a synthetic resin roller 32 is rotatably fitted to the pin 31. A spring 20 is fitted on the vertical shaft 16, and the spring 20 urges the roller 32 in a direction of pressing the roller 32 against the guide rail 1.

The lock fitting receiver 19 is fixed to the guide rail 1, and the lock fitting receiver 19 is attached to the door body 2.
Are opposed to the bracket 15 in the closed state.
The lock fitting receiver 19 has a leading end protruding in the path of passage of the roller 32. The lock fitting receiver 19 has a concave portion 21 formed at the center of the leading end portion thereof. Has become. The lock fitting receiver 19
The upper end of the recess 21 has a tapered surface that rises as it descends.

A hook 23 is connected to one end of the wire 10, and the hook 23 is engaged with the lock fitting 30. An unlocking handle (not shown) is rotatably attached to the panel 3, the unlocking handle and the lock fitting 30 are connected via the wire 10, and the lock fitting 30 is rotated by rotating the unlocking handle. The roller 32 rotates through the vertical shaft 16 so that the roller 32 can be fitted into and removed from the recess 21.

When the door body 2 is lowered from the open state, the roller 32 comes into contact with the lock fitting receiver 19 immediately before reaching the closed state. The roller 32 rides on the lock fitting receiver 19 while rolling, and is fitted into the recess 21 by the restoring force of the spring 20 at the completely closed position. The lock fitting receiver 19 is positioned so that the upper edge of the recess 21 is lightly in contact with the roller 32 when the door body 2 is completely closed.

Thus, the door 32 is locked by the engagement of the lock 32 with the roller 32 when the door body 2 is completely closed.

When unlocking, the unlocking handle is rotated, the lock fitting 30 is rotated via the wire 10, and the roller 32 is detached from the recess 21.

In the locking operation, the roller 32 and the lock fitting receiver 19 are in rolling contact with each other, so that the roller 32 and the lock fitting receiver 19 are smooth and have little wear and sound.

When unlocking, the roller 32 and the recess 21
Is in rolling contact with the upper end surface of the roller 32 so that the roller 32 and the recess 21 are tightly fitted even if the roller 32 and the recess 21 are tightly contacted.
The operating force on the unlocking handle does not increase significantly.

The roller 32 and the lock bracket 19
May be metal or synthetic resin. Further, in order to reduce the surface pressure on the roller 32, the thickness of the lock fitting receiver 19, particularly, the thickness of the tip portion may be increased.

[0028]

As described above, according to the present invention, since the lock fitting receiver and the roller are in rolling contact with each other, the fitting and disengaging operation becomes smooth and the abrasion sound is reduced. Also, since a large force is not required for the unlocking operation, the wear of parts is small and the durability is improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of an embodiment of the present invention.

FIG. 2 is a plan view showing a main part of the embodiment of the present invention.

FIG. 3 is an explanatory view showing the operation of the embodiment of the present invention.

FIG. 4 is a schematic explanatory view of an overhead door.

FIG. 5 is a front view showing a main part of a conventional example.

FIG. 6 is a plan view showing a main part of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide rail 2 Door main body 3 Panel 8 Unlocking handle 10 Wire 19 Lock bracket receiver 20 Spring 21 Depression 30 Lock bracket 31 Pin 32 Roller

Claims (1)

[Claims] 1. A lock fitting receiver is provided on a guide rail side, a lock fitting is pivotally mounted on a door body side, and a roller rotatably provided on the lock fitting can be fitted into and removed from the lock fitting receiver. Characterized by being rotatable by an unlocking handle.