JPH10317660A - Bearing body for ceiling inspection port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling inspection port in which there is no need to align a hinge axis part with a groove opening part and by merely moving the hinge axis part located on the surface of an inner side flange of an outer frame, the axis part can be automatically engaged in a locking part so that the axis part can be easily engaged and disengaged. SOLUTION: The ceiling inspection port comprises an inner frame with a hinge axis part and an outer frame 2 provided with a bearing body 1, into which the part is fitted, and the inner frame is rotatably disposed with respect to the outer frame 2. In this case, the bottom side of the body 1 is a flat plate 11 to be attached to an inner side flange surface 21 of the frame 2, and the body 1 has a guide groove bottom part 12 which is provided at the lower part of the plate 11 and the forward end surface of the part 12 is flush with the flange surface 21 and which extends rearward in a curved form, a locking part 13 which is formed continuously from the rear end of the part 12 and extends downward from a curved top part 12a of the part 12, and a stopper part 14b which is provided in a protruding part 14a formed continuously to an upper wall 14 spaced apart from the part 12 by a predetermine interval and which extends forwardly of a opening end 12b of the part 12 to prevent the hinge axis part from moving upward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing for a ceiling inspection port provided for inspecting and repairing facilities such as piping and wiring arranged inside a building ceiling.

[0002]

2. Description of the Prior Art FIG. 8 is a perspective view showing a conventional bearing body for a ceiling inspection port. The bearing body 7 of the ceiling inspection port is a resin flat plate 71, and the bottom surface is attached to the inner flange surface 21 of the outer frame 2 in a tangential manner. On the outer surface of the flat plate 71, a mounting protrusion 72 is provided so as to protrude therefrom, and is pushed and fixed into a window hole 23 provided in the vertical wall 22 of the outer frame 2. This bearing (flat plate 7)
1) In the front end face of 7, an opening 73 for inserting the hinge shaft 8 is opened at the center of the height, and a downwardly inclined groove 74 continuous with the opening 73 is provided. The hinge shaft fitting portion 75 is provided.

[0003] As shown in FIG. 9, a hinge shaft 8 protrudingly attached to the outer surface of the inner frame moves the inner flange surface 21 of the outer frame 2 toward the rear end. Then, after the hinge shaft 8 ′ approaching the front end face of the bearing body 7 hits the front end face,
By lifting the inner frame upward, aligning the hinge shaft 8 ′ with the opening 73 on the front end surface, and inserting the hinge shaft 8 ′ into the opening 73, the hinge shaft 8 ′ descends in the downwardly inclined groove 74, and the bottom of the groove bottom is lowered. The fitting part 75 is fitted. Thereby, the inner frame is rotatably attached to the outer frame 2.

[0004]

In the conventional bearing body of the ceiling inspection opening, an opening 73 is formed at the center of the height of the front end face. Therefore, the height position of the opening 73 depends on the inner flange surface (the bottom surface of the bearing body 7) 2 of the outer frame to which the hinge shaft 8 slides.
It is at a position considerably higher than 1. Therefore, when inserting the hinge shaft 8 into the opening 73, an operation of lifting the inner frame is required. However, the height of the lift cannot be determined from below because the clearance between the inner frame (door surface) and the outer frame is small. For this reason, it is difficult to align the height of the hinge shaft 8 with respect to the opening 73 and to insert the hinge shaft 8.

The upper and lower surfaces of the opening 73 formed in the front end surface of the bearing body 7 are flush with each other, and there is no member for preventing the hinge shaft from rising when the inner frame is lifted. Therefore, there is a disadvantage that the hinge shaft portion 8 passes through the opening 73 (see the pin shaft 8 ″ in FIG. 9), and the same positioning operation is repeated many times. However, since the groove 74 continuous with the opening 73 has a steep downward slope, there is a disadvantage that it takes time to remove the hinge shaft 8 from the fitting portion 75 at the bottom of the groove.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, does not require any alignment between the hinge shaft and the groove opening, and simply moves the hinge shaft located on the inner flange surface of the outer frame. It is an object of the present invention to provide a ceiling inspection port bearing body which can be automatically fitted to a fitting portion, is easily fitted and removed, and has good workability.

[0007]

In order to achieve this object, a bearing for a ceiling inspection port according to the present invention has the following configuration. The bearing body of the ceiling inspection opening includes an inner frame having a hinge shaft portion and an outer frame having a bearing body fitted with the hinge shaft portion, and the inner frame is rotatably disposed with respect to the outer frame. A ceiling inspection port, wherein the bearing body is a flat plate having a bottom surface attached to an inner flange surface of an outer frame, provided at a lower portion in the plane of the flat plate, a front end surface flush with the inner flange surface, and a rear end portion A guide groove bottom that bulges in the direction of the guide groove, a fitting part that is continuous with the rear end of the guide groove bottom, and that is located below the curved top of the guide groove bottom, and that is spaced apart from the guide groove bottom by a predetermined distance. A stopper is provided on a protruding portion which is continuous with the open upper wall and protrudes forward from an opening end of the guide groove bottom portion, and prevents a hinge shaft portion from moving upward.

[0008] In the bearing of the ceiling inspection port having such a configuration, the hinge shaft projecting from the outer surface of the inner frame is placed on the upper surface of the inner flange surface of the outer frame, and the hinge shaft is moved (slided) in this state. ). When the hinge shaft approaches the bearing, even if the hinge shaft slightly floats on the inner flange surface during the movement, the hinge shaft abuts on the stopper portion of the tip projecting portion. The lower surface of the stopper portion is set to have a curved shape that bulges toward the rear end (toward the opening of the guide groove). Therefore, the hinge shaft portion collides with the stopper portion, thereby preventing further upward movement.
Furthermore, the guide is guided to the opening at the tip of the guide groove by the curved curved surface of the lower surface of the stopper.

The leading end of the opening of the guide groove is flush with the inner flange surface and has no step. Therefore, when the hinge shaft portion is further pushed forward, the hinge shaft portion smoothly advances on the curved surface at the bottom of the guide groove toward the top portion, and is automatically fitted to the fitting portion communicating with the groove portion. Therefore, the hinge shaft portion placed on the upper surface of the inner flange surface portion of the outer frame can be automatically fitted to the fitting portion simply by pushing forward.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of a bearing for a ceiling inspection port according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 6 and 7, the ceiling inspection opening comprises an outer frame 2, an inner frame 3, and a cover plate 5 for closing the inside of the inner frame 3. FIG. 2 shows the inner frame 3 and the hinge shaft 4 of the ceiling inspection opening.
It is a perspective view which shows the relationship with. The inner frame 3 is rotatably attached to the outer frame 2 at a frame opening of the outer frame 2 via a hinge shaft portion 4 and a bearing body 1 described later. Inner frame 3 has inner frame 3
A cover plate 5 for closing the frame opening is attached, and an inspection door is formed.

The inner frame 3 is, for example, formed by cutting a steel material, an aluminum alloy material or the like into a frame piece having a predetermined length, butted into a rectangular shape, and forms a frame. Upper and lower groove portions 31a, 31a are provided on the upper and lower flange surfaces 31, 31 outside the inner frame 3 so as to face each other.
The corner fittings A provided at the four corners of the inner frame 3 have upper and lower sides slidably fitted into the upper and lower grooves 31a, 31a. Pin shafts (hinge shaft portions) 4 project outward from the outer surfaces of the two left and right corner metal fittings A provided on the rear end side of the four corners of the inner frame 3. . That is, the corner fitting A also serves as a hinge.

FIG. 1 shows an outer frame 2 of a ceiling inspection port and a bearing 1.
It is a perspective view which shows the relationship of. The outer frame 2 is formed of the same material as the inner frame 3, and frame pieces abutted in a square shape are fixed to the frame with corner fittings A.

The bearing 1 is mounted on the rear end of the outer frame 2, that is, on the rear end of the vertical wall 22. The vertical wall portion 22 has a mounting window hole 22a. At the lower end of the vertical wall portion 22, a horizontal inward flange surface portion 21 protrudes. On the other hand, the outer surface of the bearing body 1
1a protrudes. With the bottom surface of the bearing body 1 placed on the upper surface of the inner flange surface portion 21, the protruding shaft portion 11 a is pushed into the mounting window hole 22 and fixed to the rear end of the vertical wall portion 22 of the outer frame 2. The bearing body 1 is mounted.

The bearing body 1 is, for example, a flat plate formed of a synthetic resin material and having a constant thickness. This flat plate 11
Has a height substantially equal to the height of the vertical wall portion 22 of the outer frame 2 and has a thickness substantially equal to the projection width of the inner flange surface portion 21. A guide groove is formed at a lower portion in the plane of the bearing body (flat plate 11) 1 by notching a predetermined length from the front end side to the rear end direction. The guide groove includes a guide groove bottom portion 12 and a fitting portion 1.
3 and a stopper 14b. Specifically, at the lower portion of the flat plate 11, the front end surface 12 b is provided with the inner flange surface 2.
1 and a guide groove bottom 12 which is curved in a bulging shape in the direction of the rear end portion is provided. Are formed continuously.

Further, a projecting portion 14 which is continuous with the upper wall 14 and protrudes forward from an end opening 12b of the guide groove bottom 12 is provided on the upper wall 14 which is spaced apart from the guide groove bottom 12 by a predetermined distance.
a, and a stopper portion 14b for preventing the upward movement of the hinge shaft portion 4 is formed on the projecting portion 14a.

The stopper portion 14b is provided in the guide groove 12
Is formed in the shape of an eave protruding forward from the front end opening surface (the opening surface whose front end surface is flush with the inner flange surface 21), and its lower surface is directed toward the rear end (the front end of the guide groove 12). It is formed on a bulging curved surface portion 14c set in a curved shape bulging toward the opening 12b).

In the bearing of the ceiling inspection port having such a configuration, the hinge shaft 4 of the inner frame 3 is placed on the upper surface of the inner flange surface 21 of the outer frame 2 as shown in FIG. In this state, the inner frame 3 is moved toward the rear end of the outer frame 2.

The inner frame surface 21 of the outer frame 2 is
When the hinge shaft portion 4 protruding from the outer surface is slid (moved) and the hinge shaft portion 4 approaches the bearing body 1, the moving hinge shaft portion 4 may slightly float from the upper surface of the inner flange surface portion 21. Even if there is, the stopper portion 1 of the tip projecting portion 14a
4b.

The lower surface of the stopper 14b is formed in the guide groove 1
2 curved portion 14 bulging toward the direction of the tip opening 12b
c is set. Therefore, the hinge shaft portion 4 collides with the lower surface of the stopper portion 14b, thereby preventing further upward movement, and opening the distal end of the guide groove portion 12 along the lower surface bulging curved surface 14c of the stopper portion 14b. Part 12b
It is led to. That is, as shown in FIG. 3, the leading end 12b of the opening of the guide groove is set at a position further retracted from the rear end of the curved curved surface 14c of the lower surface of the stopper surface 14b. Therefore, the hinge shaft portion 4 is easily guided to the space between the lower surface bulging curved surface 14c and the inner flange surface 21 (FIG. 3).
reference).

Further, the tip of the opening 12b of the guide groove 12 has the same height as the upper surface of the inner flange surface 21, so that there is no step. Therefore, in that state,
When the hinge shaft portion 4 is pushed forward, the hinge shaft portion 4 advances on the guide groove bottom portion 12 which smoothly bulges out without resistance, and advances toward the curved top portion 12a of the guide groove bottom portion 12, and automatically moves beyond the top portion 12a. It fits into the fitting part 13 which communicates with the groove part (see FIG. 5).

Therefore, the front opening surface 12 of the guide groove 12
Since the b and the inner flange surface 21 are flush with each other and are set to have a smooth curved shape without any level difference, it is unnecessary to align the groove tip opening 12b with the hinge shaft 4. By simply pushing forward the hinge shaft portion 4 placed on the upper surface of the inner flange surface portion 21 of the outer frame 2, the fitting portion 1 is automatically
It is dropped into 3. Further, the fitting portion 13 and the curved top 1
Since the step with the fitting 2a is small, the engagement with the fitting 13 can be easily removed only by slightly raising the hinge shaft 4 in the fitting 13.

[0023]

According to the present invention, as described above, the stopper is provided above the front end, the opening end of the guide groove is provided at a position retracted from the stopper, and the bottom of the guide groove is provided at the rear fitting portion. The opening tip surface is set to be flush with the inner flange surface, and the hinge shaft is placed on the upper surface of the inner flange surface, and the inner flange upper surface is simply slid. Just by moving, it can be automatically fitted to the fitting portion via the guide groove bottom. Therefore, the present invention achieves the object of the present invention such that the hinge shaft portion is lifted as in the related art and there is no disadvantage such as alignment with the opening of the bearing body. Has an effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a relationship between an outer frame and a bearing body.

FIG. 2 is a perspective view showing a relationship between an inner frame and a hinge shaft.

FIG. 3 is an explanatory view showing a state where a hinge shaft moves on an inner flange surface and fits into a bearing body.

FIG. 4 is an explanatory diagram showing a state in which an inner frame is attached to an outer frame.

FIG. 5 is an explanatory view showing a state where the inner frame is attached to the outer frame via a hinge.

FIG. 6 is a perspective view showing a ceiling inspection port.

FIG. 7 is a plan view showing a state in which a cover plate door of a ceiling inspection opening is closed.

FIG. 8 is a perspective view showing a relationship between a conventional outer frame and a bearing body.

FIG. 9 is an operation explanatory view showing a relationship between a conventional hinge shaft and a bearing body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bearing body 2 Outer frame 3 Inner frame 4 Hinge shaft part 11 Flat plate 12 Guide groove bottom part 13 Fitting part 14 Upper wall part 21 Inner flange surface 12a Curved top part 12b Tip opening 14a Projecting part 14b Stopper part 14c Swelling curved surface

Claims (2)

[Claims] 1. A ceiling inspection port comprising an inner frame having a hinge shaft and an outer frame having a bearing body fitted with the hinge shaft, wherein the inner frame is rotatably provided with respect to the outer frame. In the above, the bearing body is a flat plate having a bottom surface attached to the inner flange surface of the outer frame, and is provided at a lower portion in the plane of the flat plate, and a front end surface is flush with the inner flange surface, and swells in a rear end direction. A guide groove bottom that curves in a shape, a fitting portion that is continuous with the rear end of the guide groove bottom, and that is positioned lower than the curved top of the guide groove bottom, and an upper wall that is separated from the guide groove bottom by a predetermined distance. And a stopper that is provided on a protruding portion that protrudes forward from the opening end of the guide groove bottom and that prevents the hinge shaft from moving upward. 2. The stopper portion has a lower surface set to a swelling curved surface which swells in the direction of the fitting portion in a swelling manner, and an opening front end surface of the guide groove bottom portion is further larger than a rear end of the lower surface swelling curved surface. The bearing body for a ceiling inspection opening according to claim 1, wherein the bearing body is set at a position retracted rearward.