JPH08144632A - Automatic door open/close device - Google Patents

Abstract

PURPOSE: To miniaturize and lighten a device, and to facilitate mounting. CONSTITUTION: In an automatic opening/closing a door, in which a moving member 6, on which the door is mounted, is made to travel on a frame 1 and the door is opened and closed, two racks 3, in which grooves 2 are formed to side faces for guiding the moving member 6, are laid in parallel on the frame 1. A gear shaft 4, in which teeth continued in the axial direction are formed to an outer circumferential surface, is borne in parallel with the racks 3 and rotatably in the upper sections of the racks 3, and a motor is connected at one end of the gear shaft 4. A gear member 7, in which crown gears 7b engaged with the gear shaft 4 and helical gears 7a engaged with the racks 3 are formed integrally, is installed to the moving member 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic door opening / closing device installed in a house or a store.

[0002]

2. Description of the Related Art Generally, an automatic door opening / closing device installed in a house, a store, or the like is of a sliding type that opens and closes by sliding a door. As shown in FIG. 5, this sliding type apparatus rotates a pulley 11 forward and reverse by a motor (not shown), and a belt 13 stretched between the pulleys 11 and 12.
In most cases, the belt driving is configured so that the moving member 14 is moved between the pulleys 11 and 12 to slide the door T.

[0003]

However, in a device driven by a belt, a space for installing pulleys at both ends is required in addition to the moving stroke of the moving member, so that the device itself becomes large. Further, the belt needs to be tightened to change the winding angle of the belt around the pulley according to the weight of the door. For this reason, in a belt-driven device, the frame supporting the pulleys has a relatively strong structure, so that the device itself becomes heavy and the mounting operation is not easy.

In particular, when the above-mentioned device is to be mounted on an upper portion of a door frame with respect to an existing door provided with a guide member below, the mounting strength is not strong enough to withstand the weight of the device, and most of the devices are brittle. is there. Further, as shown in FIG. 6, if the lower floor surface is used as the mounting surface of the device 15 and it is attempted to be mounted in the space on one side of the sliding door T, the space in which the pulleys 11 and 12 are installed will prevent people from entering and leaving.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a door automatic opening / closing device which is compact and lightweight and easy to install.

[0006]

In order to achieve the above object, an automatic door opening and closing apparatus according to the present invention is provided with an automatic door opening and closing apparatus for opening and closing a door by moving a moving member having the door mounted on the base. In the above, a groove was formed on the side surface to guide the moving member, and a rack laid on the gantry, and a tooth that was supported in a freely rotatable manner in parallel and upward with the rack, and was formed on the outer peripheral surface thereof in an axial direction were formed. A gear shaft, a drive source for driving the gear shaft, a crown gear member meshing with the moving member with the gear shaft, and a helical gear rotating in conjunction with the crown gear member and meshing with the rack. The members were provided.

[0007]

According to the automatic door opening and closing device of the present invention, a groove is formed on a side surface for guiding a moving member, and a rack laid on a frame is provided.
A gear shaft, which is rotatably supported in parallel with and above the rack, and has teeth continuously formed in the outer peripheral surface thereof, and a drive source for driving the gear shaft, wherein the moving member includes the gear shaft, A meshing crown gear member and a helical gear member that rotates in conjunction with the crown gear member and meshes with the rack are provided, so that when the drive source is driven, the gear shaft and the crown gear member maintain a meshed state. The rotating force is transmitted to the helical gear member, and the moving member moves on the rack.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view partially showing a configuration of an automatic door opening / closing device of the present invention, FIG. 2 is a front view of FIG. 1 showing a partial cross section, and FIG. FIG. 4 is a view showing the shape of a crown gear provided on a gear member.

In FIGS. 1 to 3, reference numeral 1 denotes a gantry,
Two racks 3 are laid in parallel on the gantry 1. Further, for example, a V-shaped groove 2 is formed on the side surface of these racks 3 in the length direction, and the moving member 6 is movable in the length direction of the rack 3 by being guided by the groove 2.

Reference numeral 4 denotes a gear shaft having a length substantially equal to that of the rack 3 and having a plurality of, for example, 12 teeth continuously formed in the outer peripheral surface thereof in the axial direction.
The two racks 3 are arranged substantially at the center and upward. The gear shaft 4 is supported by supporting plates 1a and 1b having both ends erected on both ends of the gantry 1, and one end is connected to a driving source, for example, a motor 5.

Reference numeral 7 denotes a gear member.
A helical gear 7a meshing with the rack 3 at an angle of 0 ° and a crown gear 7b rotating coaxially with the helical gear 7a and meshing with the gear shaft 4 are integrally formed. It is pivotally supported by a shaft 6 a in the moving member 6 while being inclined with respect to the rack 3 and the gear shaft 4.

The crown gear 7b provided on the gear member 7
Form teeth radially from the center of rotation. Crown gear 7
The teeth of b are processed so that the pressure angle is 20 ° in the parallel direction and the orthogonal direction with respect to the gear shaft 4. As shown in FIG. 4, the teeth are narrowed from the substantially central portion to the outer peripheral side. The teeth of the gear shaft 4 and the teeth of the crown gear 7b are in surface contact with each other.

The automatic door opening / closing device of the present invention has the above-described structure, and drives the motor 5 to drive the gear shaft 4.
Is rotated, the rotational force is transmitted from the crown gear 7b to the helical gear 7a while the gear shaft 4 and the crown gear 7b mesh with each other, and the moving member is actuated by the action of the rack 3 meshing with the helical gear 7a. 6 moves by being guided by the groove 2 formed on the side surface of the rack 3. Then, as the moving member 6 moves, the door T attached to the moving member 6 slides and opens and closes.

In this embodiment, a case has been described in which a gear member integrally formed with a crown gear and a helical gear is provided in the moving member. However, the crown gear and the helical gear are provided as separate members and are interlocked. A configuration may be adopted. Further, in the present embodiment, the case where one end of the gear shaft is directly connected to the motor has been described, but the gear shaft may be driven via a gear or a belt.
In particular, it is desirable that the reduction ratio from the motor to the gear shaft can be changed according to the load of the door attached to the moving member.

[0015]

As described above, according to the present invention, since the moving member is configured to move on the pedestal, it is not necessary to install pulleys on both ends of the pedestal, which interferes with the moving amount of the moving member. Therefore, the device can be made smaller and lighter.

Further, since there is no need to adjust the driving force by adjusting the winding angle of the belt according to the weight or the like of the door attached to the movable member, it is possible to attach and drive the door to an arbitrary door. Then, the door can be attached to the moving member after attaching only the device of the present invention, or only the device of the present invention can be attached after attaching the door, and the attaching work is easy.

[Brief description of drawings]

FIG. 1 is a plan view partially showing a configuration of an automatic door opening / closing device according to the present invention.

FIG. 2 is a front view of FIG. 1 shown in partial cross-section.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a view showing a shape of a crown gear provided on a gear member.

FIG. 5 is a diagram showing a configuration of a conventional automatic door opening and closing device.

FIG. 6 is a diagram showing a state in which a conventional automatic door opening / closing device is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stand 2 Groove 3 Rack 4 Gear shaft 5 Motor 6 Moving member 7 Gear member 7a Helical gear 7b Crown gear

Claims (1)

[Claims] An automatic door opening / closing device for opening and closing a door by moving a movable member having a door mounted on the gantry, wherein a groove is formed on a side surface to guide the movable member, and a rack laid on the gantry; A gear shaft that is rotatably supported in parallel with and above the rack and has teeth that are continuous in the axial direction on the outer peripheral surface thereof, and a drive source that drives the gear shaft. An automatic door opening / closing device, comprising: a meshing crown gear member; and a helical gear member that rotates in conjunction with the crown gear member and meshes with the rack.