JPH0552086U - Inspection frame - Google Patents

Abstract

(57) [Summary] [Purpose] When the inner frame is fitted to the outer frame, the support metal should not project outward from the peripheral edge of the outer frame. [Structure] A square outer frame 1 and a square inner frame 2 fitted to the outer frame are provided, and both ends of the inner frame are connected to the outer frame via a first link 9 and a second link 11. A projecting piece 1 which is rotatably mounted and which is mounted on the upper end of the inner frame at the upper edge of the outer frame.
3 is provided so that the end side of the inner frame can be pulled upward from immediately before the closing of the inner frame to the end.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an inspection port frame attached to an opening in a ceiling.

[0002]

[Prior Art]

 A conventional ceiling inspection port frame is disclosed in Japanese Utility Model Publication No. 63-44510.

As shown in FIG. 1 and FIG. 2, this one has a pair of engaging plates provided on the side plates of the inner frame so as to face outward, and an engaging hook piece is provided at the tip of the engaging plates. The lower side of the engaging plate is supported by the upper side of the side plate of the outer frame.

With this configuration, when the inner frame is rotated 90 degrees downward while sliding the lower side of the engagement plate supported by the upper side plates of the outer frame, the engaging hooks are engaged with the upper sides of both side plates of the outer frame. The inner frame is suspended and supported by fitting the respective pieces.

[0005]

[Problems to be solved by the device]

 According to the above configuration, when the inner frame is closed, the inner frame is pushed up to release the engagement state between the engaging hook piece and the upper edge of the side plate of the outer frame, and then the outer frame is tilted and moved. While contacting the lower side of the engaging plate with the upper side of the side plate, push up the inner frame while maintaining the contact state, slide the lower side of the engaging plate on the upper side of the side plate, and then insert the inner frame into the outer frame. Therefore, there is a problem that it takes a lot of time and effort to close the inner frame and that the inner frame cannot be closed smoothly.

Particularly when the inspection port is provided close to the wall, there is a problem that the inner frame cannot be closed because the tip of the engaging plate hits the wall surface during the closing of the inner frame.

Therefore, an object of the present invention is to provide an inspection port frame capable of smoothly closing the inner frame.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention comprises a rectangular outer frame and a rectangular inner frame fitted to the outer frame, and one end of each outer surface of the inner frame and one end of the outer frame. Both ends of the first link are rotatably attached to one end of each inner surface of both sides, and one end of the first link attachment side of both outer surfaces of the inner frame and both inner surfaces of the outer frame are described above. Both ends of the second link are rotatably attached to the inner side of the first link attachment end, and further, from immediately before the closing of the inner frame to the upper edge of the rear end of the outer frame from the end upper edge of the inner frame. It adopts a configuration in which a projecting piece for getting in is provided.

[0009]

[Action]

 When the well-known locking mechanism at the front end of the inner frame is released, the protrusion slides from the upper edge of the rear end of the outer frame as the inner frame moves downward while rotating the first and second links respectively. It falls and comes off.

The inner frame that is being opened due to the sliding-down of the projecting piece is released from the upper end of the inner frame being pulled up. The end side is opened while moving forward, and the open inner frame is supported by the outer frame in a suspended state via the first link and the second link.

Further, when closing the inner frame, if the front end side of the inner frame is pushed up, the rear end side of the inner frame is moved rearward while rotating the first link and the second link, and the inner frame is moved to the outer frame. As soon as the inner frame closes, the projecting piece rides on the upper edge of the rear end of the outer frame, so that the rear end side of the inner frame is pulled upward.

[0012]

【Example】

 An embodiment according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the inspection port frame according to the present invention comprises a rectangular outer frame 1 and an inner frame 2 fitted inside the outer frame 1. A space required for normal fitting is formed between the outer frame 1 and the outer frame 1. The outer frame 1 is formed by front, rear, left and right four side plates 3. Further, the inner frame 2 is formed by four front, rear, left and right side plates 4.

A flange 6 for mounting the ceiling plate 5 is provided on the outer periphery of the lower edge of the outer frame 1, and a concealing flange 7 protruding inward and outward of the side plate 4 is provided on the lower edge of the inner frame 2. The flange 7 is provided so as to conceal the gap between the outer frame 1 and the inner frame 2 (air tight type). Further, the outer peripheral edge of the flange 7 is provided with an upward bent portion 8 that comes into contact with the lower surface of the ceiling plate 5 when the inner frame 2 is fitted to the outer frame 1. This greatly improves the sealing effect between the inner frame 2 and the outer frame 1.

Reference numeral 9 is a first link having both ends rotatably attached to the ends of both outer surfaces of the inner frame 2 and the ends of both inner surfaces of the outer frame 1 via pins 10, respectively.

Reference numeral 11 denotes a second link in which both ends are rotatably attached via pins 12 to the end portions of both outer surfaces of the inner frame 2 and inward of the attachment ends of the first link 9 on both inner surfaces of the outer frame 1, respectively. is there .

When the inner frame 2 and the outer frame 1 are fitted to each other, the first link 9 and the second link 11 partially overlap with each other, so that the overlapping portion is bent to avoid a collision.

A protrusion 13 is provided at the upper edge of the end of the inner frame 2 (on the side where the first link 9 and the second link 11 are arranged) so as to get on the upper edge of the rear end of the outer frame 1 immediately before the inner frame 2 is closed. It's a piece. The projecting pieces 13 are provided at both ends of the side plate 4 in the illustrated case.

The inspection port frame shown in the embodiment has the above-described structure. As shown in FIGS. 1 and 2, the outer frame 1 is inserted into the opening 21 from below the opening 21 formed in the ceiling. It is supported on the channel 22 through the hanging hardware 23.

Further, a closing plate 24 made of the same material as the ceiling plate 5 is fitted into the inner frame 2, the lower surface of the peripheral portion is received by the flange 7, and the closing plate 24 is pressed against the flange 7 by the clip 25. ing.

Further, the inner frame 2 fitted to the inner side of the outer frame 1 is held in a closed state by a locking mechanism 26 (well known, detailed description thereof is omitted).

When the locking mechanism 26 for locking the inner frame 2 in the closed state is released and the front end of the inner frame 2 is pulled down, the projecting piece 13 slides down from the upper edge of the side plate 3 of the outer frame 1.

The inner frame 2 which is in the middle of opening due to the slide-down of the projecting piece 13 is released from the pulling of the inner frame 2 toward the upper end side, so that the first link 9 and the second link 11 shown in FIG. By the clockwise rotation, the rear end side of the inner frame 2 moves forward and is opened, and as shown in FIG. 4, the inner frame 2 in the open state is attached to the outer frame 1 via the first link 9 and the second link 11. It is supported in a suspended form.

When the inner frame 2 is closed, if the front end side of the inner frame 2 is pushed up, the rear end side of the inner frame 2 is rotated while the first link 9 and the second link 11 are rotated clockwise. The inner frame 2 is fitted into the outer frame 1 while being moved rearward.

At this time, since the projecting piece 13 rides on the upper edge of the side plate 3 of the outer frame 1 immediately before the inner frame 2 is closed, the rear end side of the inner frame 2 is pulled upward.

After the closing of the inner frame 2 fitted to the outer frame 1, the locking mechanism 26 is operated to maintain the closed state of the inner frame 2.

In the figure, 27 is a packing which is supported on the entire circumference of the lower surface of the flange 6.

[0028]

【effect】

 As described above, according to the inspection port frame of the present invention, since the inner frame is rotatably attached to the outer frame via the first link and the second link, it is possible to fit the inner frame to the outer frame. The rotation support member does not project outward from the outer frame. Therefore, the inspection port frame can be attached at a position close to the wall.

Also, when the inner frame is fitted to the outer frame, the protrusions that ride on the upper edge of the outer frame prevent the inner frame from falling below the rear end of the inner frame, and the ceiling plate is pulled up as the inner frame is pulled upward. Pressing the lunge improves the concealment effect.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment.

FIG. 2 is a vertical sectional side view of the above.

FIG. 3 is an enlarged vertical side view showing the main part of the above.

FIG. 4 is a vertical sectional side view showing an opened state of the inner frame.

[Explanation of symbols]

 1 Outer frame 2 Inner frame 3, 4 Side plate 5 Ceiling plate 6, 7 Flange 8 Bent portion 9 First link 10 pin 11 Second link 12 pin 13 Projection piece

Claims (1)

[Scope of utility model registration request] 1. An outer frame having a rectangular shape and an inner frame having a rectangular shape fitted to the outer frame, wherein both ends of one outer surface of the inner frame and one end of both inner surface sides of the outer frame. Both ends of the first link are rotatably attached, and one end of one side of the first link attachment side on both outer sides of the inner frame and the inside of the first link attachment end on both inner sides of the outer frame. An inspection port frame in which both ends of the second link are rotatably attached to each other, and a projecting piece is provided on the upper end of the inner frame at the rear end of the outer frame immediately before the inner frame is closed. ..