JPH0421994Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an automatic closing device for a sliding door, and particularly to an automatic closing device in which a brake is automatically activated at the final stage of the sliding door closing operation.

[Conventional technology]

As a conventional automatic closing device, for example,
Examples include those disclosed in Japanese Utility Model Application Publication No. 58-120978, Japanese Utility Model Application Publication No. 59-147870, and Japanese Utility Model Application Publication No. 61-41773. However, according to these conventional devices, since the device operates over the entire length of the sliding door, opening and closing the sliding door becomes heavy and cannot be operated easily, and a special space is required for installing the device. Furthermore, in order to install the sliding door to an existing sliding door, it was necessary to separately perform construction work to create the above-mentioned space. Additionally, some types were extremely complex in structure.

[Problem that the invention attempts to solve]

This invention was proposed to solve all the problems mentioned above. That is, for one thing,
In addition to allowing the sliding door to be opened and closed easily, the brake is activated on the sliding door when the sliding door is close to closing, preventing unexpected accidents such as injury due to hands etc. being caught, and allowing the sliding door to be closed safely and reliably. One of them is
It was developed with the aim of making it possible to install it by utilizing the space that a normal type of sliding door inevitably provides.

[Structure of the idea]

The automatic sliding door closing device of this invention has a pinion rotatably attached to the frame of the sliding door, and a rack of a required length that removably engages with the pinion is attached to the guide rail or other immovable member of the sliding door when the sliding door is closed. It is fixed along the opening/closing direction from a position, and engages with the pinion to form a brake operation section, and one end of a self-actuating energy storage type piston-cylinder device pivotally connected to the sliding door is eccentric to the rotation center of the pinion. The invention is characterized in that the piston-cylinder device maintains a compressed state beyond the dead center of the pinion when the pinion is in the easily disengaged state.

This invention will be explained below based on embodiments shown in the drawings. Most of the members constituting the device of this invention are usually made of metal materials such as iron, brass, or synthetic resin materials.

In FIG. 1 showing the state in which the sliding door is closed,
1 is a sliding door, 2 is a guide rail fixed to the door frame, etc.
3 is a wheel that is installed on the upper part of the sliding door 1 via a mounting bracket 4 and rolls on the guide rail 2; 5 is an opening; 6
is a wall or partition plate.

As shown in FIGS. 1 and 2, the frame 7 of the present invention is fixed to any part of the sliding door 1, such as the rear part, with screws 8, 8, bolts and nuts, etc. It is something. Frame 7 in the illustrated example
It is composed of a substrate 7a and a pair of upper and lower U-shaped mounting frames 7b and 7c fixed to the substrate. Note that the mounting position of the frame 7 to the sliding door 1 is not limited to the rear part, and depending on the situation around the sliding door, it can be installed in another part, or the frame can be built into the sliding door. It can also be designed like this.

The frame body 7 rotatably supports, for example, a semicircular pinion 9 located in the space of the upper mounting frame 7b. The illustrated pinion 9 has a semicircular shape due to the presence of a piston cylinder device 11, which will be described later, but a completely circular pinion can also be used depending on the assembly method.

Reference numeral 10 is a rack of a required length that engages with the pinion 9, and is fixed to the guide rail 2 of the sliding door 1, the door frame, the wall 6, and other immovable members. The rack 10 is attached to a stationary member by aligning the length direction of the rack 10 with the opening/closing direction of the sliding door 1, and when the rack 10 and pinion 9 are in mesh with each other at one end in the closed position of the sliding door 1. The pinion 9 is disposed so that it can engage and rotate on the rack 10 in the opening direction, and this section is defined as a brake operation section.

The pinion 9 has one end of a self-actuating energy storage type piston cylinder device 11 attached to a horizontal shaft 12 eccentrically with respect to the rotation center O of the pinion 9.
It is pivoted by In this pivot portion, a two-pronged mounting member 11 is attached to one end of the piston cylinder device 11, that is, the tip of the piston rod 11a.
b, and the mounting member 11b is pivotally mounted to the pinion 9 in such a position as to straddle it. Further, the other end of the piston cylinder device 11 is pivotally connected to a suitable position of the sliding door 1, for example, to the rear portion thereof, via a lower mounting frame 7c of the frame 7 by a horizontal shaft 13.

The self-actuating energy storage type piston cylinder device 11 used in this invention is as follows:
An example of this is the well-known gas spring, in which when the piston rod 11a is contracted, energy is stored in the cylinder 11c by gas or a spring, and the piston rod 11
This is a type in which, after contraction, a automatically expands due to the stored energy. That is, this piston cylinder device 11 exhibits an elongating action without any fluid pressure being applied from the outside.

[Effect]

In FIG. 1, the sliding door 1 closes the opening 5, and the self-acting energy storage piston-cylinder arrangement 11 is in the extended state. When the sliding door 1 in the closed state is manually opened, the pinion 9, which is engaged with the rack 10 at the beginning of the opening operation, rotates counterclockwise in FIG. The attached piston-cylinder device 11 is contracted and energy is stored in the cylinder 11c for a later extension action. As shown in FIG. 3, when the pinion 9 reaches the tip of the rack 10 designed to have the required length and leaves there, the pivot point 1 between the pinion 9 and the piston cylinder device 11
2 rotates beyond the bottom dead center of the rotation center O of the pinion 9 to the opposite right side, and one end 9a of the pinion 9
contacts the mounting member 11b of the piston cylinder device 11, so even if the pinion 9 is removed from the rack 10 and the sliding door 1 is subsequently manually opened, the piston cylinder device 11 remains in its contracted state. It turns out.

Next, when the sliding door 1 is manually closed, the initial stage of the closing action is as before, when the sliding door 1 is in a free state and is moved vigorously in the closing direction by the wheels 3 rotating on the guide rail 2. It comes, but sliding door 1 is the third
When the pinion 9 is returned by hand to the position shown in the figure and engages with the rack 10, the pinion 9 rotates clockwise in the opposite direction to the above, and the pivot point 12 of the piston cylinder device 11 is aligned with the center of rotation O of the pinion 9. It rotates to the left side beyond the bottom dead center, and the locked state of the piston-cylinder device 11 that was in the contracted state is released, so the piston-cylinder device 11 expands by its own action due to the energy stored in the cylinder 11. When the pinion 9 begins to rotate clockwise as shown in Figure 3, a brake is applied to the sliding door 1, which had been moving in a free-wheeling manner until then, and the speed is slowed down, and the person no longer applies manual force. Slowly, the sliding door 1 automatically continues its closing action until it reaches the state shown in FIG. 1, and the sliding door 1 can be completely closed. As a result, the sliding door 1 can be closed safely and reliably without causing an unexpected accident such as getting your hand caught and getting injured by the sliding door 1 that is rapidly moving in the closing direction.

In addition, if the guide rail 2 is set to be inclined upward to the right in FIGS. 1 and 3, the sliding door 1 will move under its own weight on the original stairs during the closing action, and
In the final stage, the piston-cylinder device 11 is moved by the extension action, so it can be automatically closed over the entire stroke.

[Effect of idea]

The automatic sliding door closing device of this invention described above has an extremely simple structure, and has a brake operation section in which the rack and pinion engage only in a predetermined section from the final closing position of the sliding door. In the disengaged state, the sliding door can be operated lightly, and the piston cylinder device is kept in a compressed state, so even if the brake is activated with the pinion and rack engaged and the sliding door is moved vigorously in the closing direction. Sliding doors can be slowed down to prevent unexpected accidents such as getting your hands caught and injured, and can be closed safely and reliably, as well as cleverly utilizing the space that a normal type of sliding door inevitably provides. It is designed to be able to be installed, and has the advantage of being able to be installed on existing sliding doors without requiring special installation space.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing the closed state of the automatic sliding door closing device of this invention, Fig. 2 is an enlarged perspective view of its main parts, and Fig. 3 is a side view of the sliding door of the device shown in Fig. 1. FIG. 4 is a partially cutaway side view showing an intermediate stage of the opening or closing action; 1... Sliding door, 2... Guide rail, 7... Frame,
9...Pinion, 10...Rack, 11...Piston cylinder device.

Claims (1)

[Scope of utility model registration request] A pinion 9 is rotatably attached to the frame 7 of the sliding door 1, and a rack 10 that removably engages with the pinion 9 is attached to the guide rail 2 and other immovable members of the sliding door 1 along the opening/closing direction from the final closed position of the sliding door 1. The self-actuating energy storage type piston-cylinder device 11, which is pivotally connected to the sliding door 1, is pivoted eccentrically from the center of rotation of the pinion 9. When the pinion 9 is in the state where the pinion 9 is disengaged from the rack 10, the piston cylinder device 11
An automatic closing device for a sliding door, characterized in that the pinion 9 maintains a compressed state beyond its dead center.