JP2798548B2 - inspection door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection port such as a ceiling inspection port or a floor inspection port.

[0002]

2. Description of the Related Art In general, in an inspection opening of this type, for example, a ceiling inspection opening, a rectangular inner frame is mounted on a rectangular outer frame so as to be openable and closable. A ceiling plate material similar to a ceiling plate is attached to an inner frame fitted into an opening formed in the plate and fitted into the frame of the outer frame. In order to mount the ceiling plate, mounting pieces for supporting the ceiling plate from below are formed on the frame pieces of the outer frame and the inner frame so as to protrude therefrom. Since the rotating means is provided between the inner frame and the inner frame so as to open and close the inner frame so that the inner frame can be opened and closed, it is necessary to position the inner frame with respect to the outer frame with an interval corresponding to the rotating means. For this reason, at present, the protruding pieces are protruded horizontally so as to cover this space.

[0003]

However, in the above-described conventional apparatus, the inner frame must have projecting pieces projecting inward and outward, respectively. It was unavoidable. SUMMARY OF THE INVENTION In view of the above-described drawbacks, an object of the present invention is to reduce the size of an inner frame and to provide an inspection port capable of smoothly and reliably performing opening and closing rotation of the inner frame.

[0004]

In order to achieve the above-mentioned object, according to a first aspect of the present invention, there is provided a method according to a first aspect of the present invention, wherein a rectangular frame is provided between an outer frame and an inner frame. In the inspection opening which opens and closes the inner frame with respect to the outer frame by the rotating means,
A vertical side body having a vertical wall extending from a lower portion to an upper portion,
And the horizontal part formed at the end of this vertical side body.
Integrally formed in a substantially L-shaped cross section and framed in a square
A lower body formed from an outer frame body, the inner frame having a lower part proximate to the outer frame and extending upward, and an intermediate body extending inward from an upper part of the lower body. And an upper body extending upward from the intermediate body, formed from an inner frame body integrally formed in a substantially crank shape in cross section and framed in a square shape,
A guide groove having an open front surface is formed along the lower outer surface of the upper body of the inner frame body, and when the inner frame is assembled to the outer frame,
Te, vertical outer frame body facing the to the upper body of the inner frame member
Forming a space between the Jo-side member, prior to the spatial portion
The rotating means is attached to the vertical side body facing the guide groove.
In addition , the gist of the present invention is that it is movably disposed in the guide groove .

According to a second aspect of the present invention, the inner frame is opened and closed with respect to the outer frame by rotating means interposed between the outer frame and the inner frame formed in a rectangular frame. At the inspection opening, the outer frame is vertically extended with a vertical wall extending from the lower part to the upper part.
The side body and the horizontal part formed at the end of this vertical side body
Are integrally formed in an approximately L-shaped vertical cross section and framed in a square.
A lower body having a lower part proximate to the outer frame and extending upward, and an intermediate part extending inward from the upper part of the lower body. A body and an upper body extending upward from the intermediate body are formed of an inner frame body integrally formed in a substantially crank shape in cross section and framed in a rectangular shape, and a lower part of the inner body is formed on an upper body of the inner frame body. A guide groove having an open front surface is formed along the side surface, and the outer side facing the guide groove is formed.
In the middle of the vertical side of the frame, the front along the outer surface
When the inner frame is assembled to the outer frame, an upper frame of the inner frame and the outer frame facing the upper frame are formed when the inner frame is assembled to the outer frame.
Forming a space between the vertical-shaped side members of the body, in the space portion
The rotation means is movably arranged in the two guide grooves.
The main point is to do .

Further, according to a third aspect, the contract
3. The inspection door according to claim 1, wherein the inner frame formed in a square shape has an upper body upper end and a lower body lower end of the inner frame body opposed to each other on the side where the rotating means is provided. Is set to be equal to or shorter than the opening length of the outer frame and longer than or equal to the opening length of the inner frame body, and the rotating means connects the lower body lower end to the lower body from the rotating means. The gist of the invention is that the open / close movement state is set at a position where the maximum length to be tied is longer than the length from the turning means in the closed state of the inner frame to the inner surface of the opening of the outer frame.

[0007]

According to the above construction, in the first aspect , the circuit
Move the moving means vertically between the upper body of the inner frame and the outer frame facing it.
Since it is to be stored in the space formed by the side body,
Make the space between the inner frame of the inner frame and the outer frame of the outer frame as narrow as possible.
The inner frame, that is, the inner frame itself,
And make it smaller, and
The opening and closing rotation of the inner frame is formed at the lower part of the upper body of the inner frame.
This is performed by rotating means for moving the guide groove.

[0008] In a second aspect , the above-mentioned claim 1 and
Similarly, the space between the inner frame of the inner frame and the outer frame of the outer frame
Narrow the inner frame, that is, the inner frame itself to the size of the inspection port.
And make it smaller, and the outer frame
Open / close rotation of the inner frame with respect to the lower outer frame of the upper body of the inner frame
Rotation means to move the guide groove formed substantially in the middle portion of the body
This is done by:

Further, in a third aspect, the first aspect is provided.
Or in addition to the description of the action in 2,
This is to facilitate opening and closing operations.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described in detail with reference to FIGS. 1 to 6. In the drawings, reference numeral 1 denotes an entire ceiling inspection opening. An outer frame 3 mounted on the opened portion, and an inner frame mounted on the outer frame 3 so as to be openable and closable and rotatably mounted on the top plate 4 similar to the ceiling plate 2 5, a locking device 6 for holding the inner frame 5 in a closed state with respect to the outer frame 3, and a suspending means 7 for hanging the outer frame 3 to a beam or the like disposed behind the ceiling. It is composed of

The outer frame 3 is formed by frame-forming four frame pieces 8 each having a substantially inverted L-shape in vertical section, and is fitted in a rectangular opening of the ceiling plate 2 having a two-layer structure. In the upper and lower portions of the inner surface of the vertical portion of the frame piece 8, bulging portions 8a and 8b slightly bulging toward the opening side in which the inner frame 5 is inserted and inserted are positioned over the four circumferences. Integrally formed,
An upwardly-facing hook-like piece 8c is integrally formed at substantially the center of the outer surface of the vertical portion of the frame piece 8 so as to be positioned over four circumferences. Are formed integrally so as to be located over four circumferences. A corner member 3a bent at a substantially right angle is inserted into each corner of the outer frame 3 over a groove surrounded by the hook-shaped piece 8c and the protruding piece 8d.

The lower outer surface of the outer frame 3 is fitted into the opening of the ceiling panel 2 in a contact state, and is suspended by the suspension means 7 on a beam or the like. That is, the suspension means 7 includes a substantially L-shaped fixing bracket 9, a mounting bolt 10 erected from the fixing bracket 9 by bolts and rivet means, and a vertically inserted beam or the like inserted through the mounting bolt 10. A pair of upper and lower holding plates 11 to be held,
A fixing nut 9 screwed into the mounting bolt 10 to tighten the holding plate 11;
Into the hook-shaped piece 8c of the outer frame 3 and screw it on,
The outer frame 3 is hung on a beam or the like by holding a pair of holding plates 11 against a beam or the like by tightening a talking nut 12.
The outer frame 3 can be used upside down according to the structure of the ceiling plate 2 as shown in FIG.

The inner frame 5 is formed by forming four frame pieces 13 into a rectangular frame, and is inserted into the opening of the outer frame 3. The frame piece 13 is a frame of the outer frame 3. A vertical lower body 13a proximate to the vertical portion of the piece 8 and extending upward from the lower end to substantially the center, and a horizontal lower body 13a extending inward from the upper portion of the lower body 13a. Intermediate 13b;
The intermediate body 13b is formed integrally with the upper body 13c extending upward from the inner end to the upper end of the intermediate body 13b in a substantially crank shape in longitudinal section. On the outer surface of the lower end of the lower body 13a, a bulging portion 14 facing the bulging portion 8a of the frame piece 8 of the outer frame 3 with a slight gap c is formed so as to be located on four sides. Opposing engaging ridges 15a and 15b protrude from the upper surface of the body 13b and substantially the center of the outer surface of the upper body 13c.
Guide grooves 16 surrounded by a and 15b are formed so as to be located on four sides.

In the opening of the inner frame 5,
The top plate 4 having the same configuration as the above-mentioned ceiling plate 2 (in this example, a two-layer structure) has its four circumferences matched with the inner peripheral surface of the lower body 13a and its upper surface abutted on the lower surface of the intermediate body 13b. A mounting screw is attached to an L-shaped mounting plate 19 that is positioned and vertically adjustable through a long hole 17 and a screw 18 that penetrates the upper body 13 c of the inner frame 5 in a vertical direction. 20, the four side edges are fixed respectively.

Thus, the inner frame 5 is formed substantially at the front end for engagement of the rotating shaft 21 which is fastened in the vicinity of the cheek end on one side of the opposing frame pieces 8, 8 of the outer frame 3. Annular groove 2 for shaft
1a is movably engaged with the engaging ridges 15a, 15b, and the engaging ends thereof are engaged with the engaging ridges 15a, 15b.
It is located in the guide groove 16 surrounded by b. Thus, the inner frame 5 is mounted to be openable and closable with respect to the outer frame 3 so as to open and close the opening of the outer frame 3 with the rotation shaft 21 as a fulcrum.

Then, the inner frame 5 formed in the square is
Inner frames 5 facing each other on the side where the rotating shaft 21 is mounted
The maximum length S that diagonally connects the upper end of the upper body 13c and the lower end of the lower body 13a of the frame piece 13 is shorter than the opening length W of the outer frame 3 and the opening length (W-2C) of the inner frame 5 The rotation shaft 21 is set to be longer or equal, and the rotation shaft 21 is
The maximum length F connecting from 1 to the lower end of the lower body 13a is set at a position longer than the length D from the rotation shaft 21 to the inner surface of the opening of the frame piece 8 of the outer frame 3 when the inner frame 5 is closed. It is set to the open / close movement state. Further, the rotating shaft 21 is connected to the outer frame 3.
Are set substantially at the center in the vertical direction of the frame pieces 8, 8.

A notch-shaped insertion outlet (not shown) for inserting the rotating shaft 21 from above is formed at a predetermined portion of the engagement ridge 15a on one side of the guide groove 16. I have. At each corner of the inner frame 5, a corner member 5a bent at a substantially right angle is inserted through a guide groove 16 surrounded by engaging ridges 15a and 15b.

The locking device 6 at a substantially central portion of one edge of the top plate 4 of the inner frame 5 (the opposite edge where the rotation shaft 21 is located) is cut into a desired shape. Notch 22
The operating shaft 23 of the locking device 6 is stored in the notch 22.

That is, the substantially L-shaped cover member 24 covers the lower part of the inner frame 5 so as to cover the lower portion of the notch portion 22.
3 is fixed to the lower body 13a with a screw or the like, and a through hole 24a through which the lower end of the operation shaft 23 is inserted is formed substantially at the center of the horizontal portion of the cover member 24. This operation shaft 23
The upper surface 13c of the inner frame 5 is supported by a bracket 25 having a substantially Ω shape in a plane so as not to be detachable and rotatable so as to be rotatable.
An engagement groove is formed which is slightly projected and inserted into a position for engaging a turning operation tool, a coin or the like, and a flat locking piece 26 is horizontally provided at an upper end portion.

Each of the frame pieces 8 and 13 of the inner frame 5 and the outer frame 3 to which the locking pieces 26 face each other, has a horizontal hole-like engaging hole 27 into which the locking pieces 26 can be engaged and disengaged. 28 are formed. When the locking piece 26 of the locking device 6 is engaged from the engagement hole 27 of the inner frame 5 to the engagement hole 28 of the outer frame 3, the inner frame 5 is closed with respect to the outer frame 3. In an up-down positioning state and in a detached state from the engagement holes 27 and 28, the inner frame 5 is allowed to rotate about the rotation shaft 21 with respect to the outer frame 3 as a fulcrum, and is opened.

The frame member 13 of the inner frame 5 on the side where the locking device 6 is mounted is provided with guide members 29 for rotating the inner frame 5 on both sides of the locking device 6. Are installed at two intervals. That is, the guide member 2
9 and 29 are guide surfaces 29 that are substantially curved from the top end of the intermediate body 13b of the frame piece 13 to the top end of the upper body 13a.
a, 29a, and each of the bent support portions or fixing portions is fixed to the upper surface portion of the intermediate body 13b and the upper body 13a. Thus, the guide members 29, 29
The guide surfaces 29a, 29a of the outer frame 3
The inner frame 5 is configured to be in sliding contact with the inner surface at the lower end to guide the rotating state of the inner frame 5.

The rectangular inner frame 5 of the ceiling inspection port 1 of the present embodiment, which is constructed as described above, is formed of the frame pieces 13 of the inner frame 5 opposed to each other on the side where the rotary shaft 21 is mounted. Upper body 1
The maximum length S connecting the upper end of 3c and the lower end of the lower body 13a diagonally is set to be shorter than the opening length W of the outer frame 3 and longer than or equal to the opening length (W-2C) of the inner frame 5, Further, the rotating shaft 21 is moved from the rotating shaft 21 to the lower body 13.
a the maximum length F connecting the lower end to the length D from the rotation shaft 21 to the inner surface of the opening of the frame piece 8 of the outer frame 3 when the inner frame 5 is closed.
The opening / closing state is set to a longer position, and the position of the rotating shaft 21 is set at substantially the center in the vertical direction of the frame pieces 8, 8 of the outer frame 3. When the operating shaft 23 is rotated by approximately 90 degrees using a rotating operation tool or the like, and the locking piece 26 is disengaged from the engaging hole 28 of the outer frame 3 and the engaging hole 27 of the inner frame 5, The inner frame 5 is smoothly opened with the end on the locking device 6 side lowered downward with the rotation shaft 21 as a fulcrum with respect to the outer frame 3. The rotation shaft 21 moves relative to the guide groove 16 in accordance with the rotation state.

When the inner frame 5 rotates, the guide surfaces 29a, 29a of the guide members 29, 29
By slidingly contacting the inner surface of the lower end portion, the rotation state of the inner frame 5 is guided more smoothly. In this example, as shown in FIGS. 3 and 4, the ceiling plate 2 and the top plate 4 of the ceiling inspection port 1 may be formed in a single plate shape. Also, the inner frame 5 is set at 90 degrees or 180 with respect to the outer frame 3.
The opening and closing direction of the inner frame 5 can be set to an appropriate direction by rearranging the arrangement.

Next, another embodiment of the present invention will be described with reference to FIGS. 7 and 8. The embodiment shown in FIG.
In this embodiment, one end of the rotating shaft 21A is mounted on the guide groove 16 of the frame piece 13A of A, and the other end is movably mounted on the outer frame 3A side. A projection 8e provided on a pair of hook-shaped pieces 8c, 8c formed substantially at the center of the outer surface of the vertical portion is integrally formed on the piece 8A so as to be positioned over four circumferences. The two distal ends of the rotary shaft 21 are located in the guide grooves 16, 16A formed by the hooks 8c and the protruding pieces 8e. The annular portions 21a, 21a are configured to be movably engaged with the engaging projections 15a, 15b and the hook-shaped piece 8c and the projection 8e. In addition, any one end part of the rotating shaft 21A can be caulked to the guide grooves 16, 16A. Other details are the same as those of the previous embodiment, so that illustration and description thereof are omitted. Therefore, in this case, the same operation and effect as those of the above-described embodiment can be obtained.

The embodiment shown in FIG. 8 is an embodiment in which the outer frame 3B of the above-described embodiment in which the shape of the outer frame 3 is slightly changed is used upside down. In this case, the ceiling is attached to the horizontal portion 8f of the frame piece 8B. The plate 2B is placed and fixed. Although each of the above-described embodiments has been described with reference to the ceiling inspection port 1, for example, it can be similarly implemented as a floor inspection port.

[0026]

As described above, according to the present invention, the first
In the present invention, the rotating means is accommodated in a space formed by the upper body of the inner frame and the vertical side body of the outer frame facing the inner body. The space between the frame and the outer frame is made as small as possible, so that the size of the inner frame, that is, the inner frame itself can be reduced as compared with the size of the inspection port. For example, there is an advantage in design that the length dimension can be set short and the strength can be set high. Further, the opening and closing rotation of the inner frame with respect to the outer frame can be smoothly performed by the rotation means for moving the guide groove formed in the lower outer surface of the upper body formed in the inner frame. In addition, since the rotating means can be set as low as possible in the vertical direction of the frame, even if the inner and outer frames have a relatively large width in the vertical direction, the inner frame can be rotated and good. Can be done. In addition, the workability at the time of installation of the ceiling plate can be improved from a structure in which unnecessary projecting portions are eliminated as much as possible in the outer frame.

According to a second aspect of the present invention, there is provided a first aspect.
The same effect as described above can be achieved, and the opening and closing rotation of the inner frame with respect to the outer frame can be performed more smoothly by the rotating means that moves the two guide grooves.

Further, in the third aspect, in addition to the effect of the first aspect, the opening and closing rotation of the inner frame with respect to the outer frame can be further smoothly performed.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1; However, this shows a state in which the ceiling plate and the top plate are integrated into one sheet.

FIG. 4 is an enlarged cross-sectional view around the rotation axis.

FIG. 5 is an enlarged sectional view around the locking device.

FIG. 6 is an enlarged cross-sectional view taken along line CC of FIG. 3;

FIG. 7 is an enlarged sectional view showing another example around the rotation axis.

FIG. 8 is an enlarged cross-sectional view showing another example of the usage of the outer frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling inspection opening 3 Outer frame 5 Inner frame 8 Frame piece 13 Frame piece 13a Lower body 13b Intermediate body 13c Upper body 21 Rotation axis

Claims (3)

(57) [Claims] 1. An inspection opening for opening and closing the inner frame with respect to the outer frame by a rotating means interposed between the outer frame and the inner frame formed in a square frame, wherein the outer frame is moved to a lower portion. Vertical body with a vertical wall extending from the top
And the horizontal part formed at the end of this vertical side body.
Integrally formed in a substantially L-shaped cross section and framed in a square
A lower body formed from an outer frame body, the inner frame having a lower part proximate to the outer frame and extending upward, and an intermediate body extending inward from an upper part of the lower body. And an upper body extending upward from the intermediate body, and is formed from an inner frame body integrally formed in a substantially crank shape in cross section and framed in a rectangular shape, and an upper body of the inner frame body is formed on a lower outer surface thereof. space between the hand, vertical-shaped side of the upper body and the outer frame member facing thereto in said frame upon along forming a guide groove having an open front surface, and assembling the inner frame to the outer frame And forming the rotating means in the guide groove in the space.
Attached to the vertical side body facing
An inspection port characterized by being movably arranged . 2. An inspection port for opening and closing the inner frame with respect to the outer frame by a rotating means interposed between the outer frame and the inner frame formed in a rectangular frame , wherein the outer frame is connected to the lower portion. Vertical body with a vertical wall extending from the top
And the horizontal part formed at the end of this vertical side body.
Integrally formed in a substantially L-shaped cross section and framed in a square
A lower body formed from an outer frame body, the inner frame having a lower part proximate to the outer frame and extending upward, and an intermediate body extending inward from an upper part of the lower body. And an upper body extending upward from the intermediate body, and is formed from an inner frame body integrally formed in a substantially crank shape in cross section and framed in a rectangular shape, and an upper body of the inner frame body is formed on a lower outer surface thereof. A guide groove having an open front surface is formed along the middle portion of the vertical side body of the outer frame body facing the guide groove.
Has a guide groove with an open front along its outer surface
When assembling the inner frame to the outer frame, a space is formed between the upper body of the inner frame and the vertical side body of the outer frame facing the inner frame , and the space is formed in the space. Moving means
An inspection port characterized by being movably arranged in a guide groove . 3. The rectangular inner frame has a maximum length that diagonally connects an upper end of the upper body and a lower end of the lower body of the inner frame opposing each other on the side on which the rotating means is provided. It is set shorter than the opening length of the outer frame and longer than or equal to the opening length of the inner frame, and furthermore, the maximum length connecting the turning means to the lower end of the lower body from the turning means is the closed state of the inner frame. The inspection port according to claim 1 or 2, wherein the opening / closing state is set at a position longer than the length of the rotation means from the rotation means to the inner surface of the opening of the outer frame.