JPH01226993A - Door device for garage - Google Patents

Abstract

PURPOSE:To permit a door to be opened or closed under a stable condition by a method in which a spiral pulley pivotally attached to the upper part of the opening of a garage is turned by a coil spring, and the upper end of a wire is fixed to the maximum diameter of the spiral and the other end is fixed to a swing door. CONSTITUTION:A spiral pulley 15 is pivotally attached to a fixed shaft 14 horizontally set on the upper part of the opening of a garage. The upper end of a wire 17 is fixed to the maximum diameter part of the spiral and the lower end is fixed to a swing door 2. The pulley 15 is turned by the action of a coil spring wound around the fixed shaft 14 in such a way as to enable it to be wound up from the maximum diameter portion to the minimum diameter por tion. The door 2 is allowed to open upwards all the time so that the pull-up force is greater, the greater the opening angle becomes. The rocking movement of the door 2 in a semi-opened state and the unexpected closing of the door 2 can thus be prevented.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a door device for a garage, etc., particularly a door device that opens and closes a swing door by lifting it with a wire and folding it to the top of the opening or unfolding it downward. Regarding.

``Prior Art'' Conventionally, door devices of this type that use spring force to lift and fold a swinging door have a structure in which the spring force attenuates as the swinging door rises.

``Problems to be Solved by the Invention'' As a result, when the swing door is opened, it cannot be maintained stably, resulting in drawbacks such as the swing door swinging up and down in a half-open state, or closing inadvertently.

The present invention aims to eliminate such drawbacks.

"Means for Solving the Problems" In the door device of the present invention, a fixed shaft is installed horizontally above an opening of a garage or the like, and a spiral pulley is rotatably supported on this fixed shaft. Then, the upper end of the wire is fixed to the largest part of the helical diameter of the helical pulley, and the lower end of the wire is fixed to the swing door. In addition, by twisting a coil spring wound around a fixed shaft and fixing one end to the fixed shaft and fixing the other end to a helical pulley, the helical pulley can be twisted to The wire is rotated in a direction in which the wire is wound from the largest part to the smallest part of the helical diameter by a twisting force.

``Operation'' Therefore, the swinging door is constantly pulled upward by the wire due to the torsional force accumulated in the coil spring, and tends to open.

When the swing door is closed, the wire is pulled out from the maximum helical diameter of the helical pulley, so if the weight of the door is the load, the load will be applied to the helical pulley around the fixed axis. The moment is large. As the swinging door is opened, the torsional force accumulated in the coil spring weakens, but the wire is wound from the largest part of the helical pulley to the smallest part, and the wire is pulled out from the largest part of the helical pulley. As the diameter of the pull-out helix decreases, the moment due to the load gradually decreases.

Therefore, the accumulated torsional force of the coil spring (torsion rotation (number), the pulling force of the swing door becomes stronger as the opening angle becomes larger.

"Example" Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a front view of a door device according to the present invention installed at the entrance (opening) of a garage, as seen from inside the garage, and FIG. 2 is a longitudinal side view thereof. In the figure, a swing door 2 is installed between left and right vertical frame members 1 at the entrance of a garage so as to be openable and closable. That is, the swing door 2 has upper and lower door plates 2a.

2b are connected with hinges etc. so that they can be folded and unfolded freely.
As shown in FIG. 4, a bottle 3 protruding from the upper end of the upper door plate 2a is fitted into a bearing 4 fixed to the vertical frame member 1, so that it can be pivoted (opened and closed). has been done. As shown in FIG. 5, left and right rollers 6 are supported by roller shafts 7 on the left and right paddles 5 of the lower door plate 2b. These rollers 6 are guided between an inner rail plate 8 protruding from the left and right vertical frame members 1 and an outer frame 9.

Therefore, the swing door 2 is folded and unfolded with its upper and lower door plates 2a and 2b along these rails Fi8 and the frame 9. When fully deployed, the upper and lower door plates 2a, 2b hang vertically from the bearings 4 and close the garage entrance. In this state, the left and right vertical frames 5
It is locked by a known locking mechanism 20 installed between the left and right vertical frame members 1. At this time, the left and right ends of the outer surfaces of the upper and lower door plates 2a, 2b abut against the frame 9.

A projecting piece 10 is fixed to the middle part of the left and right vertical frames 5 of the lower door plate 2b, and a wire fixing pin 11 is protruded from this.

On the other hand, inverted left and right brackets 13 are protruded from the upper frame member r2 of the garage entrance, and a pipe-shaped fixed shaft 14 is horizontally installed between these brackets. Left and right spiral boots 5 are rotatably supported at both left and right ends of the fixed shaft 14, and these left and right spiral boots 5 are connected by two connecting rods 16 and rotate at the same time.

Each helical pulley 15 is provided with a helical track 15a as shown in FIG. 3, and has a continuous helical groove 15b with many circular arcs formed on its outer peripheral surface.

Such a helical boob IJ15 can be manufactured, for example, by winding channel steel in a spiral shape and welding the windings together. The upper ends of the left and right wires 17 are respectively fixed to the base ends of the tracks 15a of these spiral boots 5 having the largest helical diameter. The lower ends of the left and right wires 17 are fixed to the left and right wire fixing bins 11 of the lower door plate 2b, and the left and right spiral pulleys 15 and the swing door 2 are connected via these left and right wires 17. There is.

When the left and right helical pulleys 15 rotate in the direction of the arrow in FIG. 3, the wire 17 is wound up while fitting into the helical groove 15b, thereby pulling up the lower door plate 2b.

Relatively long left and right coil springs 18 are wound around the fixed shaft 14, and their base ends are fixed to the fixed shaft 14, and their tips are fixed to the inner surfaces of the left and right helical pulleys 15, respectively. At this time, these left and right coil springs 18 are twisted a required number of times in the direction of arrow A in FIG. 3 and fixed at both ends.

Therefore, the left and right helical pulleys 15 are connected to the left and right coil springs 1.
8, the left and right wires 17 are rotated in the winding direction, that is, in the direction of arrow B, which is opposite to arrow A, and as a result, the swing door 2 tends to be pulled up and closed. When the left and right wires 17 are wound from the larger diameter portion of the track 15a of the left and right spiral springs 5 to the smaller diameter portion, the torsional force accumulated in the coil spring 18 decreases accordingly. At the same time, the spiral pulley 1
The point of action of the tension of the wire 17 on the helical ring 5 approaches the center of rotation of the helical ring 5 (the center of the fixed ring 14). For this reason, the wire 1 for the spiral boo 1/5
The moment due to the tension at 7, ie the load on the helical boot 5 due to the weight of the swing door 2, also gradually decreases.

Therefore, in this door device, the amount of reduction in the load due to the point of application of the tension of the wire 17 coming closer to the center of the helical pulley 15 is relatively larger than the amount of reduction in the accumulated torsional force of the coil spring 18. As such, the twisting rotation speed of the coil spring 18 is determined in advance.

Therefore, when the locking mechanism that locks the swing door 2 is released, the left and right helical boots 1 and 5 are released from the coil spring 1.
8, the left and right wires 17 are wound around these spiral pulleys 15,
Along with this, the swing and Boo 2 are the upper and lower door Boo'
J2a and 2b are folded and pulled up to automatically open the garage entrance. At this time, as described above, the amount of decrease in the accumulated twisting force of the coil spring 18 is
As the point of application of the tension force 7 approaches the center of the helical pulley 15, the amount of load decrease becomes greater, so the pulling force of the swing door 2 becomes stronger as the angle between them becomes larger. Therefore, the opened swing door 2 will not swing up and down or close accidentally.

To close the swing door 2 again, hold the handle 19 protruding from the lower door brake 2b, pull it down, and lock it with the lock 81 mechanism 20.

Note that the door device of the present invention can be used not only for the entrance of a garage but also for opening and closing other openings.

"Effects of the Invention" As described above, according to the door device of the present invention, the opening angle of the swing door is large (as the swing door becomes larger, the pulling force can be increased), so that the swing door swings up and down half-open. It will no longer close accidentally.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view seen from the inside, Fig. 2 is a longitudinal side view, Fig. 3 is a perspective view showing the relationship between the fixed shaft, helical pulley, and coil spring, and Fig. 3 is a perspective view showing the relationship between the fixed shaft, helical pulley, and coil spring. FIG. 4 is an enlarged sectional view of the pivot portion of the swing door, and FIG. 5 is an enlarged sectional view of the portion that guides it. 2... Swing door, 14... Fixed shaft, 15... Spiral pulley, 17...
Wire, 18... Coil spring. Sweat 4 Figure 5

Claims (1)

[Claims] 1. In door devices for garages, etc., in which the swing door is lifted with a wire and folded over the top of the opening, or unfolded downward to open and close, a fixed shaft is installed horizontally above the opening, and a spiral is attached to this fixed shaft. A shaped pulley is rotatably supported, and the upper end of the wire is fixed to the largest part of the helical diameter of the spiral pulley, while the lower end of the wire is fixed to the swing door, and a coil spring wound around the fixed shaft is twisted. By fixing one end of the wire to the fixed shaft while fixing the other end to the helical pulley, the helical pulley is caused to twist the wire into a helical diameter by the torsional force accumulated in the coil spring. A door device for a garage, etc., characterized in that it is rotatably biased in a winding direction from the largest part to the smallest part.