JPH10185294A - Opening/closing apparatus for ceiling opening of air conditioning system and air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and safely open and close a ceiling opening without use of a stepladder, and simply inspect and exchange an air filter unit of an air conditioner in a room without entering the ceiling. SOLUTION: A pair of right and left guide rail plates 9 are provided in the ceiling of an opening formed in a ceiling 1 of a room including an air conditioner 2 in the ceiling, and a guide groove 10 is provided longitudinally in the guide rail plates 9, and further a downward longitudinal guide groove 10b is provided in a front end of each guide groove followed by a semispherical rounded part 10a. Further, a guide pin 11 protruded on left and right sides of an opening 8 is engaged with the guide groove 10, and a pair of left and right expandable slider 21 are provided rearwardly of the guide rail plate 9 with its base part rotatably supported on a horizontal shaft 6, and the opening 8 is mounted between the tip ends of the expandable slider 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device for an opening provided for inspection of an air conditioning system in which an air conditioner is installed above a ceiling, and an air conditioning system having the opening / closing device.

[0002]

2. Description of the Related Art In an air conditioning system provided with an air conditioner behind a ceiling, an inspection opening for inspection and maintenance of the air conditioner is provided on the ceiling, and the ceiling opening is closed with a ceiling lid. Air conditioners frequently require inspection, cleaning and replacement of filters, and the applicant company has developed a device that can easily pull out the filter unit from the casing of the air conditioner and easily store it in the casing. When checking the filter, etc., the ceiling inspection opening must be opened and closed.

[0003] A conventional ceiling lid is hingedly attached and opened and stopped by a lock device. Therefore, when the ceiling lid is opened, it falls down by its own weight and hangs down. The opening and closing of the ceiling lid is performed by a worker climbing on a stepladder, which is extremely dangerous because the worker pivots down rapidly when the door is opened. In addition, the stepladder must be carried and troublesome and troublesome.

[0004]

The object of the present invention is to easily and safely open and close a ceiling opening without using a stepladder, and to inspect and replace an air filter unit of an air conditioner without entering the ceiling. Easy to do in the room.

[0005]

According to the present invention, in order to achieve the above object, a ceiling opening and closing device according to the present invention comprises a pair of left and right guide rails at the back of an opening formed in the ceiling of a room having an air conditioner behind the ceiling. A plate is provided, a guide groove is provided on each guide rail plate in the front-rear direction, and a downward vertical guide groove is continuously provided at a front end of each guide groove, following a round portion such as a semicircular shape, and the guide groove is provided. A pair of left and right telescopic sliders whose bases are rotatably supported on a horizontal axis are provided behind the guide rail plate by engaging guide pins projecting from left and right sides of the opening and closing body. It has a structure in which an opening / closing body is attached between the tip portions.

In the air conditioning system according to the present invention, a pair of left and right guide rail plates are provided behind the opening of the ceiling of the room, and guide grooves are provided in each guide rail plate in the front-rear direction. At the front end of the guide rail, a downward vertical guide groove is provided continuously to a semicircular shape or the like, and guide pins projecting from the left and right sides of the opening / closing body are engaged with the guide grooves. Behind, a pair of left and right telescopic sliders whose bases are rotatably supported on a horizontal axis are provided, and a ceiling opening and closing device is provided with an opening and closing body attached between the distal ends of these telescopic sliders, and Behind the ceiling, an air conditioner in which the air filter unit in the casing can move up and down and can be pulled out below the casing or housed in the casing can be moved up and down the opening of the ceiling. There as being provided a structure in.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the accompanying drawings. In the figure, reference numeral 1 denotes a ceiling of a room, 1a denotes an air inlet, 1b denotes an air outlet, 2 denotes an air conditioner, and 3 denotes an opening provided in a dashed line. Is mainly used as an inspection port.

Reference numeral 4 denotes a frame provided behind the ceiling. A movable opening / closing device 5 is provided in the frame. The opening / closing device will be described below. The left and right side plates 4a and 4b of the frame 4 are provided with left and right support plates 7 and 7 via horizontal shafts 6 and 6 protruding to the inside of the frame, respectively, so as to be rotatable around these horizontal axes. The bases of the telescopic sliders 21 are mounted below the horizontal shafts 6 inside the support plates 7.

The telescopic slider 21 has a structure in which an intervening rod 24 is provided between two guide rods 22 and 23, for example, as shown in FIGS. A ball 26 as a rolling element held by a retainer 25 is disposed between the formed rolling rail 22a and a rolling rail 24a formed on one surface of the interposed rod 24 in the longitudinal direction. A retainer 2 is provided between another rolling rail 24b formed on the other surface of the other guide rail 24 in the longitudinal direction and a rolling rail 23a formed on the other guide rod 23 in the longitudinal direction.
The ball 28 held by 7 is arranged, and when it is extended, the length becomes more than twice as long as that in storage.

The telescopic slider 21 has an outer guide rod 22 as a base fixed to the inside of the support plate 7 and an inner guide rod 23 as a tip fixed to the side of the opening and closing member 8. Is supported so as to be rotatable around the horizontal shaft 6 and to be slidable back and forth.

The left and right side plates 4a and 4b of the frame 4 are provided with guide rail plates 9 and 9 along these side plates, and each guide rail plate has a guide groove 10 formed therein. At the front end of the guide groove 10, a downward vertical guide groove 10b is provided continuously to the semicircular round part 10a.

A pin 11 which engages with the guide groove 10 is provided on a front end side surface of the inner guide rod 23 of the telescopic slider. Although the guide rail plates 9 are provided on the left and right side plates of the frame in the drawing, they may be provided directly above the ceiling or indirectly via a base plate.

As shown in FIG. 1, the air conditioner 2 provided above the ceiling is configured such that the filter unit 2b in the casing 2a can be pulled out of the casing by an elevating mechanism and housed in the casing. The filter unit is provided behind the ceiling so that the filter 2b can move up and down the opening 3 in the ceiling. Reference numeral 2c indicates a blower, and reference numeral 2d indicates a cooling and heating coil.

Various types of filter unit elevating mechanisms have been developed by the applicant company. For example, as shown in the figure, a rope W wound around a drum D fixedly fitted to a drive shaft of a motor M on a casing. Is fixed to the upper part of the filter unit through a hole in the upper plate of the casing, and the filter unit is lowered and raised by forward and reverse rotation of the motor.

In this embodiment, the side guide pin 11 of the opening / closing body 8 is formed by the vertical guide groove 10b in the guide groove 10.
In the state where the telescopic slider 21 is extended and horizontal, the opening / closing body 8 is fitted into the opening 3 on the ceiling to close the opening.

However, when the opening / closing member 8 is pushed from below with a working rod or the like, the guide pin 11 is guided by the vertical guide groove 10b of the guide rail plate 9, and the horizontal shaft 6 is moved together with the telescopic slider 21.
By pivoting upwards about the center, it moves upward and separates from the ceiling opening.

Thereafter, the guide pin 11 is moved to the guide rail plate 9.
The opening and closing body 8 is slightly moved backward by being guided by the rounded portion 10a of the groove, and the telescopic slider 21 is contracted, and when further pushed backward, the opening and closing body 8 is moved to the upper rear part of the ceiling opening 3 and A ceiling opening is opened.

At this time, if the horizontal axis 6 is located on the center axis of the telescopic slider 21, the lower part of the opening / closing body 8 may contact the rear surface of the ceiling, but the horizontal axis 6 is provided above the telescopic slider. Even when the height of the opening / closing device 5 is small, there is little possibility that the lower portion of the opening / closing body contacts the back surface of the ceiling.

To close the ceiling opening, the guide pin 11 is guided by the guide groove 10 when the opening / closing body 8 is pulled forward, and the telescopic slider 21 extends and moves forward. Further, the guide pin 11 drops into the vertical guide groove 10b via the groove 10a of the round portion, the telescopic slider 21 rotates downward, the opening / closing body fits into the ceiling opening, and the ceiling opening is closed.

When the air conditioner 2 is inspected, particularly when the filter is inspected or replaced, the ceiling opening is opened by moving the opening / closing body in the above-described procedure, and the filter unit 2b is pulled down into the room by the elevating mechanism. Inspect and replace inside.
After the inspection and replacement, the filter unit is raised by the lifting mechanism and stored in the air conditioner, and then the ceiling opening is closed with the ceiling lid.

[0021]

According to the present invention, the ceiling lid can be moved in the front-rear direction by pushing or pulling the ceiling lid from inside the room with a work bar or the like, thereby opening and closing the ceiling opening. Therefore, there is no danger that the ceiling lid will be pivoted and lowered suddenly when opened, unlike the conventional one, and there is no need to use a stepladder, so that the opening and closing operation of the ceiling lid can be performed simply and safely.

Also, open the ceiling lid as described above,
The air filter unit of the air conditioner can be pulled down into the room through the ceiling opening by the elevating mechanism, so that maintenance, inspection and replacement of the filter unit can be performed easily, efficiently, and safely in the room without entering the ceiling. There are advantages that can be done.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a mechanism for opening and closing a ceiling opening and an air conditioning system according to the present invention.

FIG. 2 is an enlarged vertical sectional view of the same.

FIG. 3 is a plan view of the switching device.

4A and 4B show an example of an extendable slider, wherein FIG. 4A is a front view when stored, FIG. 4B is a left side view, FIG. 4C is a front view when extended, and FIG.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ceiling 1a ... Air inlet 1b ... Air outlet 2 ... Air conditioner 2a ... Casing 2b ... Filter unit 2c ... Blower 2d ... Cooling and heating device M ・ ・ ・ Motor D ・ ・ ・ Drum W ・ ・ ・ Rope 3 ・ ・ ・ Ceiling opening 4 ・ ・ ・ Ceiling lid 5 ・ ・ ・ Opening / closing device 6 ・ ・ ・ Horizontal axis 7 ・ ・ ・ Support plate 8 ... -Opening / closing body 9-Guide rail plate 10-Guide groove 11-Guide pin 21-Telescopic slider 22-Guide rod 23-Guide rod 24-Interposed rod 25- Ball retainer 26 ・ ・ ・ Ball 27 ・ ・ ・ Ball retainer 28 ・ ・ ・ Ball

Claims (2)

[Claims] 1. A pair of left and right guide rail plates are provided behind the ceiling of an opening formed in the ceiling of a room having an air conditioner behind the ceiling, and guide grooves are provided in each guide rail plate in the front-rear direction.
At the front end of each guide groove, a downward vertical guide groove is continuously provided following a round portion such as a semicircular shape, and guide pins projecting from the left and right sides of the opening / closing body are engaged with the guide grooves. Behind the guide rail plate, a pair of left and right telescopic sliders whose bases are rotatably supported on a horizontal axis are provided, and an opening / closing body is attached between the distal ends of these telescopic sliders. Switchgear. 2. A pair of left and right guide rail plates are provided behind the ceiling of an opening formed in a ceiling of a room, and a guide groove is provided in each guide rail plate in a front-rear direction, and a semicircle is provided at a front end of each guide groove. A downward vertical guide groove is continuously provided following the round portion of the shape and the like, and a guide pin projecting from the left and right side of the opening / closing body is engaged with the guide groove. A pair of left and right telescopic sliders rotatably supported by a shaft are provided, and an opening and closing device for a ceiling opening in which an opening and closing body is attached between the distal ends of these telescopic sliders is provided. An air conditioning system comprising: an air conditioner in which an air filter unit can be moved up and down so as to be drawn out of a casing or housed in the casing so that the air filter unit can be moved up and down the opening in the ceiling.