JPH11292435A - Elevator floor door closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a pinned bracket so that the closing force of a spring is made variable without making the shape of a lever complex by forming the pinned bracket fastened to the lever into an L-shape, and boring multiple position adjusting holes. SOLUTION: A tensile spring 10 is fitted between the pin 12 of a pinned bracket 20 fastened to a lever 5 and a pin 13 fixed to a bracket 7. The force of the tensile spring 10 is transferred to the pin 13, torque is generated CW around the lower fulcrum 14 of the lever 5, and it acts as the closing force of a door via links 8, 9. Multiple holes are provided on the pinned bracket 20, and the fitting position of a fitting hole on the lever 5 side is changed. The closing force of the door can be adjusted without complicating the shape of the lever 5 and without deteriorating the standardization and productivity of a floor door closing device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator floor door closing device.

[0002]

2. Description of the Related Art Conventionally, a fulcrum of a tension spring is determined by calculation for a change in door weight, and a large closing force is set for the effect of installation so that the effect of installation can be ignored. A bracket with pins as shown in FIGS. 5 and 6 is fixed to the lever. In addition, as disclosed in Japanese Utility Model Laid-Open No. 54-51771, a lever or a slot provided in a bracket fixed to a sill is provided so that a pin for attaching a tension spring can be moved to adjust a closing force of a door. Had been proposed.

[0003]

Problems to be Solved by the Invention
The technique disclosed in Japanese Unexamined Patent Publication No. 1 (1993) has a drawback that the shape of the lever is complicated and standardization of the floor door closing device and improvement of productivity are not achieved. In addition, when the pin fastening portion is loosened, a predetermined closing force cannot be obtained, and the door remains open, causing a problem that a person may enter the hoistway or fall.

[0004] Furthermore, with the renewal of an aging elevator that has been frequently performed recently, only the doors are updated, and in addition, a set of existing entrance / exit products (three-sided frames, thresholds, headers, link levers, etc.) are provided. When using the door, the weight of the door will be heavier than before, the existing sill will be damaged, the door rail in the existing header will rust, etc., increasing the frictional force. In such cases, the conventional bracket with pins is fixed to the lever and the position of the pins cannot be moved.Therefore, perform the drilling work on the existing lever to move the position of the bracket with pins. There is a problem that not only the door but also the link lever must be replaced.

An object of the present invention is to standardize a floor door closing device and adjust the closing force of a door even if the weight of the door changes or the frictional force changes without impairing productivity. An object of the present invention is to provide a floor door closing device that facilitates an improvement work on a closing force of a door when an aging elevator is renewed and can shorten an installation work period.

[0006]

In order to achieve the above object, the shape of the bracket with pins to be fastened to the lever is L-shaped or the like, and a plurality of holes for adjusting the position are provided, so that the actual opening is achieved.
As shown in JP-A-54-51771, the bracket with pins is made adjustable so that the closing force of the spring can be varied without complicating the shape of the lever. Also, in consideration of the renewal of an aging elevator, a structure that can be attached using the fixing hole of the bracket with pins of the existing lever will be adopted. Further, even when the bolt at the fastening portion between the lever and the bracket with the pin is loosened, this is achieved by mounting a rotation preventing bracket so that the bracket with the pin does not rotate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a typical example of a conventional closing apparatus of this type applied to a two-door opening. In the case of a two-door double door, the link 9 can be applied simply by deleting the link 9. Doors 1 and 2 are suspended by a hanger 3 fixed to the upper part, and the lower part is guided by a door shoe 4 to open and close left and right.
Is a lever whose lower end is rotatably supported by a bracket 7 fixed to a sill 6, and whose upper end is connected to a link 8 having a fulcrum on the door 1;
Are connected. The pin 12 of the bracket 20 with the pin fastened to the lever 5 and the pin 1 fixed to the bracket 7
Between them, a tension spring 10 is mounted. When the force of the tension spring 10 is transmitted to the pin 13, a clockwise torque is generated around the lower fulcrum 14 of the lever 5 and acts as a closing force on the door via the links 8 and 9. .

[0009] Conventionally, as shown in FIGS. 5 and 6,
The closing force could not be adjusted because the bracket with pin 23 was fixed to the lever 5. 7 and 8 show an example disclosed in Japanese Utility Model Application Laid-Open No. 54-51771, in which a long hole (a, b) is provided in the lever 5 or the bracket 7, and the pin 12 or the pin 13 is moved to move the door. Is a structure for adjusting the closing force of the lever 5, but when the fixing portion of the pin 12 or the pin 13 is loosened, the predetermined closing force cannot be obtained.
However, there is a problem in that the shape of the door becomes complicated, and there are problems in standardization, productivity and performance of the floor door closing device. However, in this embodiment, a plurality of holes 20a are provided in the The closing force of the door can be adjusted by changing the mounting position with the mounting hole 5a.

This makes it possible to adjust the closing force of the door without complicating the shape of the lever and standardizing the floor door closing device and without impairing the productivity. Further, even in the case of renewal of an aging elevator, improvement work on the closing force of the door can be easily performed in a short time only by using the fixing hole 5b of the bracket with a pin of the existing lever and replacing it with the bracket 20 with the pin of the present invention. Since it can be performed, the installation work period can be shortened.

The adjusting hole 20 of the bracket 20 with pins
In the case of “a”, if there is at least one, the pin 12 is located above the mounting portion, and thus has an effect that it can be larger than the existing spring force. Further, as shown in FIG. 4, a gap adjusting seat 22 is used for the bracket 20 with pins, and
1. Fixing the lever 1 and the bracket 5 with the pin 2
Even when the bolt of the 0 fastening portion is loosened, the rotation of the bracket with pin 20 can be prevented.

In this example, a plurality of holes 20a are provided in the bracket 20 with pins so that the position of the pins 12 can be adjusted. However, a plurality of holes (equivalent to 20a) are provided in the lever 5 for adjustment. You may. Further, in the present invention,
Although the case where the shape of the bracket with pins is L-shaped has been described, any shape may be used as long as the same effect can be obtained.

[0013]

According to the present invention, as shown in Japanese Utility Model Application Laid-Open No. 54-51771, the lever shape is not complicated, the standardization of the floor door closing device, and the weight of the door is reduced without impairing the productivity. Even if the frictional force changes, the closing force of the door can be adjusted. In addition, when renovating an aging elevator, simply use the fixing holes of the brackets with pins on the existing levers and replace the brackets with pins with the products of the present invention to easily improve the closing force of the door. No work of drilling holes or replacing a set of link levers is required, and the installation work period can be shortened. Furthermore, even if the bolt for fixing the lever and the bracket with the pin is loosened, the rotation of the bracket with the pin can be prevented, so that the safety of the door closing device can be improved.

[Brief description of the drawings]

FIG. 1 is an overall front view of a floor door closing device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an overall perspective view of a bracket with pins according to the present invention.

FIG. 4 is a sectional view taken along line II of FIG. 2;

FIG. 5 is a side view of a conventional floor door closing device.

FIG. 6 is a perspective view of a bracket with pins used in FIG. 5;

FIG. 7 is a side view of a conventional floor door closing device.

FIG. 8 is a side view of a conventional floor door closing device.

[Explanation of symbols]

1, 2, door 3 hanger 4, door shoe 5, lever 5a, 5b lever fixing hole 6, threshold 7, bracket 8, 9, link 10, tension spring 12,
13 ... pin, 14 ... lever lower fulcrum, 17 ... header,
18 door rail, 20 bracket with pin, 20a,
23a: fixing hole of bracket with pin, 21: detent fitting, 22: gap adjustment seat, 23: bracket with conventional pin, 31: fixing bolt, a, b: long hole.

Claims (2)

[Claims] 1. A link / lever mechanism rotatably supported by a bracket having one end fixed to a door and the other end fixed to a sill. A bracket with a pin is fastened near a sill-side fulcrum of the lever, and fixed to the pin and the sill. In an elevator floor door closing device, a tension spring is provided between pins provided on a provided bracket, and a closing force is applied to the door by a compression force of the spring.
An elevator floor door closing device having a bracket with a pin provided with an adjustment hole so that the mounting position can be adjusted in order to make the door closing force of the spring variable. 2. An elevator floor door closing device according to claim 1, further comprising a detent for preventing the bracket with pins from rotating even when the fastening portion of the bracket with pins is loosened.