JPH09324525A - Frame body of inspection hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by improving the efficiency of the assembly of the frame body of an inspection hole. SOLUTION: Four frame members 2 made of a metal are assembled in an outer frame, grooves 23 for inserting the lower ends of either one of blade pieces 22 of L-shaped comer fittings 2 among upwards upright plate sections 13 and projecting sections 14 formed onto plate sections 5 at lower ends are formed to each frame member 2, and grooves 24 for fitting the upper ends of either one of the blade pieces 22 while being oppositely faced to the grooves 23 on the upper sides of the grooves 23 are shaped at the upper ends of the upwards upright plate sections 13 of each frame member 2. One blade pieces 22 of the corner fittings 21 are inserted into the upper and lower grooves 23, 24 at the end sections of one mutually connected frame members 2 while the other blade pieces 22 of the corner fittings 21 are fitted into the upper and lower grooves 23, 24 at the end sections of the other frame members 2, and the superposing sections of the upwards upright plate sections 13 and the blade pieces 22 are bonded by caulking under the state, in which the end sections of the adjacent frame members 2, 2 are brought near mutually in an L shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame body such as an outer frame or an inner frame which constitutes an inspection port such as a ceiling inspection port or an underfloor inspection port.

[0002]

2. Description of the Related Art Conventionally, as a frame body such as an outer frame or an inner frame which constitutes an inspection port such as a ceiling inspection port or an underfloor inspection port, for example, as shown in Japanese Patent Publication No. 62-27222, 4
A corner metal fitting formed by abutting a frame member of a book into a square shape and bending each abutting corner portion of a plate material, and having a corner portion and two wing pieces extending from the corner portion. In an inspection port frame body connected at right angles, a hook-shaped protruding edge portion is provided outside or inside the upper and lower edges of the frame member, and a gap is provided between the side wall of the frame member and the hook-shaped protruding edge portion. Forming a portion, and at the upper and lower edges of the corner fitting side of the corner fitting and near the wing tip of each wing piece, bulges a protruding portion that is in pressure contact with the inner wall surface of the hook-shaped protruding edge portion of the frame member. A notch is formed in the central portion of the wing piece of the corner fitting in the longitudinal direction, and a part of the side wall of the frame member is pressed and protruded from the direction opposite to the projecting portion of the wing piece so as to be in the notch of the wing piece. It is known to be immersed in.

[0003]

However, in the frame body having the structure disclosed in Japanese Patent Publication No. 62-272222, each of the abutting corners of the four frame members abutting in a rectangular shape is a corner metal fitting. The corner fittings used in this case are connected at right angles, but the corner fittings used in this case are made of iron.Therefore, a notch is formed in the longitudinal center of the wing piece of the corner fitting so that part of the side wall of the frame member is winged. There is the following problem because the blade is pressed and protruded from the direction opposite to the protruding portion of the blade to be immersed in the notch of the blade.

1) It is necessary to form a notch in the central portion of the winglet in the longitudinal direction. 2) It is necessary to push part of the side wall against the notch formed in the central portion of the wing piece in the longitudinal direction so that the side wall is immersed.
When pushing out a part of the side wall, alignment with the notch is necessary. 3) From the above points, there is a problem that the efficiency of assembling the frame is poor and the cost is increased. The present invention solves such a problem, and an object thereof is to improve assembly efficiency and reduce cost.

[0005]

In order to solve this problem, the present invention is a frame body of an inspection port formed by assembling four frame members made of metal, and forming four sides of the frame body. In each frame member, one of the two blades of the L-shaped corner metal fitting is provided between the plate portion standing upright and the protrusion having a low height provided on the plate portion at the lower end. A groove for fitting the lower end of the piece is formed in the longitudinal direction of the frame member, and the upper end of the plate portion standing upright of each frame member is located above the groove so as to face the groove. A groove for fitting the upper end of the wing piece is formed in the longitudinal direction of the frame member, and one wing piece of the corner fitting is fitted in the upper and lower grooves at the ends of one frame member connected to each other. , By inserting the other blade of the corner fitting into the upper and lower grooves at the end of the other frame member Ri overlapping portion between the plate portion and the wing piece standing on the upper end portion comrades of the frame member in a state of being close to the L-type fit is intended to subject matter that formed by bound by caulking.

With this structure, when assembling a frame body such as an outer frame or an inner frame of the inspection port, it is not necessary to form a notch in the blade of the corner fitting as in the conventional case, and the notch is formed in the notch. It suffices to strike the frame member into the blade of the corner fitting without aligning it, which improves the assembly efficiency and reduces the cost as compared with the conventional case.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 to 11,
Reference numeral 1 denotes an outer frame suspended from a building by a hanger (not shown), which is provided in a square shape when viewed from below. Each of the four frame members 2 constituting the outer frame 1 has a substantially inverted T-shaped cross-section, and the ceiling finishing material 4 is attached to the plate portion 3 protruding outside the lower end of each frame member 2. It is installed and provided. An engaging piece 6 for rotatably supporting an inner frame, which will be described later, is integrally provided on the plate portion 5 projecting inward from the lower end of each frame member 2 of the outer frame 1 along the inner circumference. There is. Reference numeral 7 denotes an inner frame which is openably and closably provided in a square opening surrounded by the outer frame 1. The inner frame 7 has a square shape when viewed from below, and each of the four frame members 8 constituting the inner frame 7 is The cross-sectional shape is formed in an almost inverted T shape. A ceiling finishing material 10 similar to the ceiling finishing material 4 is mounted on the plate portion 9 projecting inside the lower end of each frame member 8, and the lower end of each frame member 8 is stretched outward. The outer frame 1 is also provided on the plate portion 11 of one of the four frame members 8 provided with a plate portion 11 for projecting.
Of the four frame members 2 constituting the above, an engaging piece that engages with the engaging piece 6 of one frame member 2 from above in a rotatable manner.
12 are provided integrally. More specifically, it is located at a position between the engaging piece 6 provided along the inner periphery of the plate portion 5 inside the lower end of each frame member 2 of the outer frame 1 and the plate portion 13 standing upward. The projection 14 having a low height is integrally provided,
The tip of the engagement piece 12 of the closed inner frame 7 contacts the protrusion 14 to position the inner frame 7. A step portion 15 is formed at the lower end of the engagement piece 6 so that the tip of the outer plate portion 11 of the closed inner frame 7 abuts from below.

In the figure, numeral 16 is provided on the inner surface of a plate portion 17 standing above the inner frame 7 for mounting and fixing the ceiling finishing material 10 on the plate portion 9 inside the lower end of the inner frame 7. Holding member,
Reference numeral 18 denotes a lock member provided at the upper end of a plate portion 17 standing upright in the frame member 8 facing the frame member 8 forming one side where the engaging piece 12 of the inner frame 7 is provided, and this lock member The member 18 has an operating screw 19 whose head 19a is exposed at the lower end of the inner frame 7.
A plate part whose tip is erected above the outer frame 1 by turning
The locked state where it is placed on the upper end of 13 and engaged, and the tip is the plate part 13
It is designed to rotate between a state where it is disengaged from the upper end of the. Reference numeral 20 denotes a fall-prevention claw provided so as to make a notch in a plate portion 13 standing above each of the four frame members 2 of the outer frame 1 and raise that portion inwardly of the plate portion 13. Engaging piece 12
Only the drop-preventing claw 20 of the plate portion 13 located outside the engaging piece 6 on any one side with which is engaged is raised inward,
When the inner frame 7 tries to rise upward due to vibration or the like in a state where the inner frame 7 is opened by the procedure shown in FIGS. 3A to 3D, the tip of the engaging piece 12 of the inner frame 7 falls off. The inner frame 7 can be prevented from coming off the outer frame 1 by hitting the lower end of the prevention claw 20.

The relationship between the outer frame 1 and the inner frame 7 has been described above. Next, the assembly of the outer frame 1 and the inner frame 7 will be described. First, the assembly of the outer frame 1 will be described. Each frame member 2 forming each of the four sides of the outer frame 1 is made of aluminum. The frame member 2 includes a plate portion 13 standing upright and the height. One of the two blade pieces 22 of the L-shaped corner fitting 21 made of aluminum that connects the ends of the frame members 2 and 2 adjacent to each other with the low protrusion 14 of A groove 23 for fitting the lower end is formed in the longitudinal direction of the frame member 2, and the inner surface of the upper end of the plate portion 13 standing above each frame member 2 is above the groove 23 and faces the groove 23. Of the two blade pieces 22 of the L-shaped corner fitting 21, a groove 24 for fitting the upper end of one of the blade pieces 22 is formed in the longitudinal direction of the frame member 2. Therefore, when connecting the end portions of the adjacent frame members 2 and 2, first, one of the wing pieces of the corner fitting 21 is inserted into the upper and lower grooves 24 and 23 at the end portion of the one frame member 2.
22 is inserted into the upper and lower grooves 24 and 23 at the end of the other frame member 2, and the other blade of the corner fitting 21 is then inserted.
Insert 22. As a result, the plate portion 13 and the wing piece 22 are placed in a state where the end portions of the adjacent frame members 2 and 2 are brought close to each other in an L shape.
The overlapping portion with and is joined by caulking from the outside of the plate portion 13 to connect the adjacent frame members 2 and 2 to each other. In this way, the four frame members 2, 2, ... Are connected to form the outer frame 1. The caulking of the overlapping portion between the plate portion 13 and the blade piece 22 is performed by a linear striking in a direction perpendicular to the inserting direction of the blade piece 22 into the grooves 24 and 23. 25 is a caulking part.

Next, the assembly of the inner frame 7 will be described. Each frame member 8 forming each of the four sides of the inner frame 7 is also made of aluminum, and the plate member 17 standing upright on the frame member 8 is formed. And two wing pieces of an L-shaped corner metal fitting 27 connecting the ends of the adjacent frame members 8, 8 between the protruding portion 26 formed on the plate portion 11 protruding to the outside and having a low height. A groove 29 for fitting the lower end of any one of the wing pieces 28 among the 28 is formed in the longitudinal direction of the frame member 8, and the upper end outer surface of the plate portion 17 standing above each frame member 8 has the above-mentioned structure. On the upper side of the groove 29, facing the groove 29, a groove 30 for fitting the upper end of one of the two blade pieces 28 of the L-shaped corner fitting 27 is formed in the longitudinal direction of the frame member 8. Formed in the direction. Therefore, when connecting the end portions of the adjacent frame members 8 and 8, the wing pieces 28 of the corner fitting 27 are first fitted into the upper and lower grooves 30 and 29 at the end portions of the one frame member 8. Then, the other wing piece 28 of the corner fitting 27 is fitted into the upper and lower grooves 30 and 29 in the end portion of the other frame member 8. As a result, the overlapping portions of the plate portion 17 and the wing piece 28 are caulked from the inside of the plate portion 17 with the end portions of the adjacent frame members 8 and 8 being close to each other in an L shape, and the adjacent frame portions are joined together. The members 8, 8 are connected to each other. In this way, the inner frame 7 is formed by connecting the four frame members 8, 8, .... The caulking of the overlapping portion of the plate portion 17 and the blade piece 28 is performed by striking in a linear shape that is oriented in a direction perpendicular to the direction in which the blade piece 28 is inserted into the groove 30 and the groove 29. 31 is a caulking part.

As described above, the outer frame 1 and the inner frame 7 of the ceiling inspection port are assembled, but the outer frame and the inner frame of the inspection port formed on the underfloor inspection port or the wall surface are assembled in the same manner. It can also be assembled. The frame member 2 and the corner fitting 21 of the outer frame 1 and the frame member 8 and the corner fitting 27 of the inner frame 7 are made of aluminum, but they may be made of a metal other than aluminum.

[0012]

As described above, according to the present invention, when assembling a frame body such as an outer frame or an inner frame of an inspection port, it is necessary to form a notch in a wing piece of a corner fitting as in the conventional case. In addition, the frame member may be struck into the blade of the corner fitting without aligning with the notch, and the assembly efficiency is improved and the cost can be reduced as compared with the conventional case.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an outer frame showing a state before mounting an inner frame of a ceiling inspection port according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which an inner frame is attached inside the outer frame.

3A to 3D are enlarged cross-sectional views of a main part showing a state in which the inner frame opens downward.

FIG. 4 is an enlarged perspective view of an essential part showing a state before connection of frame members forming the outer frame.

FIG. 5 is an enlarged perspective view of an essential part of the frame member forming the outer frame after the frame member is connected and viewed from the outside.

FIG. 6 is an enlarged perspective view of an essential part of a state in which a frame member forming the outer frame is connected and is viewed from the inside.

FIG. 7 is an enlarged cross-sectional view of a main part of a state where the frame members forming the outer frame are connected.

FIG. 8 is an enlarged perspective view of an essential part showing a state before connection of frame members constituting the inner frame.

FIG. 9 is an enlarged perspective view of an essential part of the state in which the frame members constituting the inner frame are connected and seen from the outside.

FIG. 10 is an enlarged perspective view of a main part of a state in which the frame members that form the inner frame are connected, as viewed from the inside.

FIG. 11 is an enlarged cross-sectional view of a main part of a state where the frame members that form the inner frame are connected.

[Explanation of symbols] 1 outer frame 2 frame member 3 plate portion 4 ceiling finishing material 5 plate portion 6 engaging piece 7 inner frame 8 frame member 9 plate portion 10 ceiling finishing material 11 plate portion 12 engaging piece 13 plate portion 14 protrusion Part 15 Step part 17 Plate part 21 Corner fitting 22 Wing piece 23, 24 Groove 25 Caulking part 26 Projection 27 Corner metal fitting 28 Wing piece 29, 30 Groove 31 Caulking part

Claims (1)

[Claims] 1. A frame body for an inspection port formed by assembling four metal frame members, wherein each frame member forming each of the four sides of the frame body has a plate portion standing upright and a lower end. A groove for fitting the lower end of one of the two blades of the L-shaped corner fitting between the projection and the low-height projection provided on the plate is the longitudinal direction of the frame member. And a groove for fitting the upper end of any one of the wing pieces on the upper side of the groove facing the groove on the upper end of the plate portion standing upright of each frame member of the frame member. One of the wing pieces of the corner fitting is fitted in the upper and lower grooves at the ends of one frame member formed in the longitudinal direction and connected to each other, and the upper and lower grooves at the ends of the other frame member are connected to each other. In the state where the other blade of the corner metal fitting is fitted and the end portions of the adjacent frame members are brought close to the L shape. A frame body of an inspection port, characterized in that an overlapping portion of a plate portion standing upright and a wing piece is joined by caulking.