JP2761710B2 - Window frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial applications] Front panels such as cubicles, covers (boxes) of various machines, entrance doors of electric rooms, etc. are provided with peep windows with transparent plates such as glass plates in order to see inside instruments and the like. It is formed. In an oil tank or the like, a vertically long viewing window is formed to view the liquid level inside.
The present invention relates to a window frame for such a viewing window, that is, a window frame for attaching a transparent plate to a window provided in a wall plate.

[0002]

2. Description of the Related Art The prior art of this kind of window frame is disclosed in Japanese Patent Publication 1-4.
No. 033, which is described with reference to the accompanying drawings. In a window frame for attaching the transparent plate 3 to the window 2 provided on the wall plate 1, first, the window frame is disposed inside and outside the window 2 of the wall plate 1. The main frame 4 and the sub-frame 5 are made of metal, respectively,
The outer peripheral frame portions 7 and 8 are formed in an annular shape having a predetermined width.

[0003] An annular packing 6 is interposed between the outer peripheral frame portions 7 and 8 of the main frame 4 and the sub-frame 5. A plurality of bolts 12 are arranged at appropriate intervals in the circumferential direction on the inner surface of the outer peripheral frame 7 of the main frame 4, and the sub-frame 5 has a through hole through which the screw shaft 12 a of each bolt 12 passes. 15 are provided.

[0004] Thus, each bolt 1
By screwing a nut 13 to the tip of the second screw shaft portion 12a, the outer peripheral frame portions 7 and 8 of the main frame member 4 and the sub-frame member 5 seal the edge of the window 2 of the wall plate 1 with the packing 6. The outer peripheral edge of the transparent plate 3 is interposed between the outer peripheral frame portions 7 and 8 via the packing 6. in this way,
If the bolts 12 are attached to the main frame 4 in advance, the construction at the site is easier without losing the place. Therefore, conventionally, a mode in which the bolt 12 is welded to the main frame 4 and implanted integrally is adopted.

[0005]

However, the main frame 4 and the sub-frame 5 are generally made of an extruded aluminum alloy in order to ensure corrosion resistance. It is welded and finished in an annular shape. The operation of welding a bolt to a main frame of such a material is inherently difficult, requires skill, and is laborious. Nevertheless, there is a problem in the welding strength of the bolt to the main frame. for that reason,
Many complaints were that the bolts came off the main frame due to over-tightening the nuts to the bolts. Accordingly, an object of the present invention is to provide a window frame that allows anybody to securely and easily attach a bolt to a main frame body and does not come off when the bolt is excessively tightened during use. It is another object of the present invention to provide a window frame which can securely temporarily fix a bolt described later at a predetermined position and can easily perform a bolting operation on site.

[0006]

According to the present invention, there is provided a window frame having the above-described basic form, wherein a screw shaft portion 1 is provided as shown in FIG.
A bolt 12 having a stopper 12b at the base end of 2a is used.
An engaging groove 10 is provided on the inner surface of the outer peripheral frame 7 of the main frame 4. The locking seat 12b of each bolt 12 is slidable along the locking groove 10 with respect to the locking groove 10 while being prevented from rotating.
In addition, they are fitted outward in a retaining shape. More specifically, at least the main frame 4 is formed by bending an extruded aluminum alloy material having a predetermined length into an annular shape and welding both ends thereof. In this way, the inwardly extending locking groove 10 in which the locking seat 12b of each bolt 12 fits is formed in the outer peripheral frame portion 7 of the main frame body 4 continuously over the entire circumference.

Thus, at least at one position of the locking groove 10, as shown in FIG. 4, an introduction portion 11 for guiding and fitting the locking seat 12b of each bolt 12 in the locking groove 10 is provided.
Further, in order to temporarily fix each bolt 12 at an appropriate position on the locking groove 10, as shown in FIG.
a, the base end 16a of the cylinder nut 16 is brought into contact with the opening edge of the locking groove 10 as shown in FIG.

The packing 6 shown in the figure is divided into four members. That is, the first and second packing members 6a and 6b are annularly mounted on the inner surface of the outer peripheral frame portion 7 of the main frame member 4 with the retaining groove 10 interposed therebetween. On the inner surface of the outer peripheral frame portion 8, a through hole 15 is interposed and a third
The fourth packing members 6c and 6d are bonded in a ring shape, the outer peripheral edge of the transparent plate 3 is sandwiched between the first packing member 6a and the third packing member 6c, and the second packing member 6b and the fourth packing The edge of the window 2 is sandwiched by the member 6d. Thus, the cylinder nut 16 is formed of a plastic material or rubber material having an internal thread on the inner peripheral surface so that the outer peripheral edge of the transparent plate 3 is received by the cylindrical nut 16 screwed to the screw shaft portion 12a.

[0009]

When the main frame 4 is made of an extruded aluminum alloy, an inwardly extending locking groove 10 is formed over the entire periphery of the main frame 4 at the same time when the profile is formed. By simply post-processing the introduction portion 11 in the locking groove 10, a desired number of the locking seats 12 b of the bolts 12 can be guided and fitted into the one locking groove 10 via the introduction portion 11. The locking groove 10 is formed in an inwardly extending dovetail shape because the locking seat 12b of the bolt 12 is
In order to prevent the bolt 12 from coming off from the opening of the locking groove 10 in the form of a detent via the stopper seat 12b while being slidable along the line. As long as the stop 12b of the bolt 12 has such a shape, it is sufficient that the stop 12b also has a function of preventing rotation and retaining.

After the locking seat 12b of the bolt 12 is fitted into the locking groove 10 via the introduction portion 11, each bolt 12 is moved to a predetermined position along the locking groove 10. Next, the cylinder nuts 16 are screwed into the screw shaft portions 12 a of the bolts 12, and the cylinder nuts 16 are tightened so that the base ends 16 a of the cylinder nuts 16 contact the opening edges of the locking grooves 10. As a result, the stop seat 12b rises and is received by the inner surface of the opening of the locking groove 10, and the bolts 12 are temporarily fixed so as not to be inadvertently displaced to the corresponding portions. Before fitting the locking seat 12b of the bolt 12 to the locking groove 10, the cylinder nut 16 may be screwed into the screw shaft portion 12a in advance, and the cylinder nut 16 may be further screwed in for temporary fixing. By this temporary fixing, the screw shaft portion 12a of each bolt 12 is formed.
The planting state is achieved without shaking, and it is easy to insert the through holes 15 of the sub-frame 5 on the other side. Thereafter, the nut 1 is attached to the tip of the screw shaft portion 12a from the outside of the sub-frame body 5 in the same manner as in the prior art.
3, the main frame 4 and the sub-frame 5 are fastened by the bolts 12 and the nuts 13.

When the window frame A is attached to the window 2 of the wall plate 1, the bolts 12 and nuts 13 are used as shown in FIG.
And the main frame 4 and the sub-frame 5 are separated. Transparent plate 3
Is temporarily placed on the main frame 4 side via the first packing member 6a as shown in FIG. 5, and a transparent plate is attached to the screw shaft 12a of the bolt 12 temporarily fixed to the outer peripheral frame 7 of the main frame 4. The outer peripheral edge of the transparent plate 3 is received via a cylinder nut 16, thereby restricting the displacement of the transparent plate 3. Since the outer peripheral edge of the transparent plate 3 is not directly in contact with the screw shaft portion 12a of the bolt 12 but is received by the plastic or rubber cylinder nut 16, the slipping movement is regulated without any flaw. From this state, the inner surface of the outer peripheral frame 7 of the main frame 4 is applied to the edge of the window 2 of the wall panel 1 from the front side so that the second packing member 6b contacts the edge. At this time, no bolt insertion hole is provided in the wall plate 1, and the screw shaft portion 12 a of the bolt 12 passes near the edge of the window 2 and projects to the back side of the wall plate 1.

Next, as shown in FIG. 2, the outer peripheral frame 8 of the sub-frame body 5 is applied to the edge of the window 2 of the wall plate 1 from the back side so that the fourth packing member 6d comes into contact. Of the screw shaft portion 1a through the through hole 15 of the mating side.
A nut 13 is screwed into the protruding tip of 2a from the back side of the outer peripheral frame portion 8 of the sub-frame body 5 and tightened. As a result, the outer peripheral frames 7.8 of the two frame members 4, 5 sandwich the edge of the window 2 from inside and outside via the second and fourth packing members 6b, 6d, and at the same time, the outer peripheral frames 7.8 The outer peripheral edge of the transparent plate 3 is sandwiched between the first and third packing members 6a and 6c. Base stop 12b
The bolts 12 in the locking groove 10 do not come off from the main frame 4 no matter how strongly the nut 13 is tightened, as long as the opening edge of the locking groove 10 is not deformed.

[0013]

According to the present invention, the outer peripheral frame 7 of the main frame 4 is provided.
Of the bolt 12 on the inner surface of the outer peripheral frame 7
The locking seat 12b of the bolt 12 is slidably inserted into the locking groove 10 of
However, since it is designed to be fitted in a retaining shape, bolting work only needs to guide the fitting of the locking seat 12b into the locking groove 10, and it can be performed by anyone compared with the conventional welding work, and workability is improved. good. Then, each bolt 12 in the locking groove 10 is
After sliding to the specified position, the screw shaft portion 12a can be temporarily fixed only by screwing the cylinder nut 16 into the screw shaft portion 12a.
Can be securely guided and fitted, and the bolting work on site can be easily performed.

The main frame 4 made of an extruded aluminum alloy material can form the locking groove 10 into an inwardly expanding shape at the same time when the shape material is formed. In this state, the locking groove 10 is continuous with the outer peripheral frame portion 7 over the entire circumference. Therefore, no special processing is required to form the locking groove 10. Further, since the locking groove 10 is formed in a continuous annular shape, the number of the introduction portions 11 to be provided in the locking groove 10 can be reduced, and in this regard, the processing can be easily performed and the cost can be reduced. In addition, as long as the stopper 12b of each bolt 12 is guided and fitted into the stopper groove 10 via the introduction part 11 provided at an appropriate position of the stopper groove 10, the stopper seat 12b can be moved inside the stopper groove 10. Freely slidingly displaced to a predetermined position along the circumferential direction of
The guide seat of the locking seat 12b is easily fitted into the locking groove 10, and the locking of the locking seat 12b from the locking groove 10 can be reliably prevented.
As a result, even when the window frame A is attached to the front plate of the outdoor cubicle, the main frame 4 and the sub-frame 5 can be strongly tightened with the bolts 12 and the nuts 13 so that rainwater does not enter.

When the main frame 4 and the sub-frame 5 are separated and attached to the window 2 of the wall plate 1, a bolt 12 is temporarily fixed to the inner surface side of the main frame 4 via a cylinder nut 16. Therefore, if the cylinder nut 16 is formed of a vertically long plastic material or rubber material, the outer peripheral edge of the transparent plate 3 and the screw shaft portion 12a are temporarily placed with the transparent plate 3 temporarily placed on the inner surface side of the main frame 4. It can be received directly by the cylinder nut 16 without being scratched, and the displacement of the transparent plate 3 can be well regulated.

[0016]

【Example】

(First Embodiment) FIGS. 1 to 6 show a first embodiment of a window frame according to the present invention. In FIG. 3, a window frame A is provided with a window 2 on a wall plate 1 in front of a cubicle box installed outdoors, and is attached to the window 2 for peeking at internal instruments. The window frame A includes a transparent plate 3 made of a glass plate with a reinforcing mesh as shown in FIG.
The sub-frame 5 and the packing 6 interposed between the two frames 4,5 are main constituent members. The transparent plate 3 may be formed of a transparent plastic material such as an acrylic resin.

The pair of the main frame 4 and the sub-frame 5 are made of an extruded aluminum alloy material, cut into a predetermined length, and then each corner is bent round and both cut ends are welded. To form a square ring. Both frames 4
・ The outer peripheral frame parts 7 and 8 of 5 have a predetermined width (25 mm in actual size)
And an annular packing 6 is interposed between the outer peripheral frame portions 7 and 8.

In FIGS. 1 and 4, on the inner surface of the outer frame 7 of the main frame 4, an inwardly extending locking groove 10 is formed continuously at the center in the width direction over the entire circumference. An introduction portion 11 communicating with the inside of the stop groove 10 is provided in a notch shape at one position. That is, since the main frame 4 is made of an extruded profile of an aluminum alloy, when the profile is extruded into a plate shape, the locking grooves 10 extend in the longitudinal direction of the plate.
At the same time. Thereby, the locking groove 10 can be easily formed so as to have a dovetail shape extending inward, and after the main frame body 4 is formed in a ring shape, it becomes a circular shape. The introduction unit 11 is shown in FIG.
As shown in the figure, it will be formed at an appropriate place of the locking groove 10 by post-processing.

In FIGS. 1 to 3, the main frame 4 and the sub-frame 5 are fastened with a plurality of (eight in the figure) bolts 12 and nuts 13 screwed to the bolts. Each bolt 12
As shown in FIG. 6, a seat 12 is provided at the base end of the screw shaft portion 12a.
The stop seat 12b can be guided and fitted into the locking groove 10 via the introduction portion 11. The locking seat 12b of the bolt 12 is slidable in the locking groove 10 over the entire circumference thereof. However, while the stop seat 12b is made larger than the opening width of the locking groove 10 to prevent it from falling outside, the stop seat 12b is formed in a rectangular plate shape in which the groove width direction of the locking groove 10 is short. Thus, the rotation of the bolt 12 in the locking groove 10 is prevented. That is, the stop seat 1
The width in the short direction of 2b is larger than the opening width of the locking groove 10.

The sub-frame 5 has a main frame 4 as shown in FIG.
The same number of through holes 15 are formed at positions corresponding to the respective bolts 12 on the side. Further, the locking seat 12b of the bolt 12 is freely movable within a certain range in the locking groove 10, so that the bolt 12 can smoothly move even in the corner of the locking groove 10, that is, in the corner of the main frame body 4. You can move.

In FIG. 1, the packing 6 is divided into four parts.
It consists of packing members 6a-6d. A first packing member 6a and a second packing member 6b are respectively mounted on the inner surface of the outer peripheral frame portion 7 of the main frame member 4 with the locking groove 10 interposed therebetween. Each of the first and second packing members 6a and 6b is made of a soft rubber material having excellent flexibility (compressibility). Glue with an adhesive so that both ends abut while being bent in a ring shape. The first packing member 6a on the inner peripheral side is formed thin (having a low protruding height), and the second packing member 6b on the outer peripheral side is formed thick.

The inner surface of the outer frame 8 of the sub-frame 5 has a through hole 1
The third packing member 6c and the fourth packing member 6d are attached to the inside and outside of the body 5 in a state of sandwiching them. These third and fourth packing members 6c and 6d are also cut to a fixed length, and then bonded by an adhesive such that both ends are abutted while being bent annularly along the outer peripheral frame portion 8. The third packing member 6c on the inner peripheral side is made of the same soft rubber material as the first packing member 6a, and is thin and rich in flexibility. The outer peripheral side fourth packing member 6d is made of a hard rubber material which is thicker than the third packing member 6c and harder than the other packing members 6a to 6c.

As shown in FIG. 6, a cylindrical nut 16 is screwed to each bolt 12 on a screw shaft portion 12a. The cylinder nut 16 is formed of a plastic material such as nylon resin, and has an inner thread on an inner peripheral surface and is formed in a vertically long cylindrical shape. When the cylinder nut 16 is made of a nylon resin, it has a self-lubricating property, which is advantageous for screwing into the screw shaft portion 12a.

As shown by the arrows in FIG. 4, each of the eight bolts 12 has its stop seat 12b guided and fitted into one of the locking grooves 10 through the introduction portion 11 to lock each bolt 12. Slide guides are respectively provided along the grooves 10 at prescribed positions. Thereafter, since the screw shaft portions 12a of the bolts 12 protrude from the openings of the locking grooves 10, the cylinder nuts 16 are screwed into the respective screw shaft portions 12a, and the base ends 16a of the cylinder nuts 16 are fixed to the locking grooves 10a. Over the opening and abut it against the opening edge. As a result, the stopper 12b is lifted up in the engagement groove 10, and the upper surface of the stopper 12b is received by the inner peripheral edge of the opening of the engagement groove 10, so that the bolts 12 can be stood upright without steadily swaying at the specified position. It is temporarily stopped.

If the four corners of the transparent plate 3 are to be rounded in accordance with the main frame 4 and the sub-frame 5 (conventional form), the time required for the cutting process is high. In particular, when the frame members 4 and 5 are to be firmly bolted, it is desired that both frame members 4 and 5 be bolted at each corner. At that time, it takes precision to finish each corner of the transparent plate 3 round,
This was also a problem in the production cost. Therefore, as shown in FIGS. 4 and 5, each corner of the transparent plate 3 is straightened (chamfered) so that each of the corners 3a is cut into the cylinder 12 of the bolt 12 on the main frame 4 side. Nut 16
It is made to take in. According to this, the main frame 4
After temporarily fixing the bolt 12 with the cylinder nut 16 as described above, the transparent plate 3 is placed on the first packing member 6 a of the main frame 4.
At the time of assembling, the first packing is provided with a predetermined gap provided between the outer peripheral edge of the transparent plate 3 and each of the bolts 12 on the outer periphery thereof, but with the center of the transparent plate 3 correctly determined. It can be placed on the member 6a.

When the window frame A is transported or stored, the glass plate 3 is placed on the first packing member 6a on the inner surface of the outer frame 7 of the main frame 4.
Are placed, and the outer peripheral edge of the transparent plate 3 is directly received by the cylindrical nut 16 screwed to each bolt 12 to restrict the displacement movement of the transparent plate 3. In this state, the sub-frame 5 is superimposed on the main frame 4, the bolts 12 are inserted into the through holes 15, and the washer 17 is attached to the tip of the screw shaft portion 12 a protruding from the outer frame 8 of the sub-frame 5. The nuts 13 are screwed together and lightly tightened to integrate all the components without separating them. At the construction site, before attaching the window frame A to the window 2 of the wall plate 1, the nut 13 is removed from the bolt 12 to separate the main frame 4 and the sub-frame 5 again. The bolt 12 and the first and second packing members 6a and 6b are previously mounted on the separated main frame 4 in the above-described manner.
Also, since the third and fourth packing members 6c and 6d are mounted in advance, the components are not scattered except for the nut 13 removed, which is convenient for handling.

When attaching the window frame A to the window 2 of the wall plate 1, the transparent plate 3 is placed on the first packing member 6a of the main frame 4.
In the state where the main frame 4 has been fitted,
The inner surface of the back side of the outer peripheral frame 7 is applied to the edge of the window 2 so that the second packing member 6b comes into contact therewith. At this time, each bolt 12 passes near the edge of the window 2, and the shaft portion 12 b of each bolt 12 projects to the back side of the wall plate 1. Next, from the back side of the wall plate 1, the front inner surface of the outer peripheral frame 8 of the sub-frame 5 is applied to the edge of the window 2 so that the fourth packing member 6d is in contact with the edge, and the main frame is aligned. The screw shaft portions 12a of the bolts 12 on the fourth side are respectively inserted into the corresponding through holes 15 on the sub-frame body 5 side, and the tips of the screw shaft portions 12a protruding behind the outer peripheral frame portion 8 of the sub-frame body 5 The nut 13
And tighten them in order.

Particularly, in the case of a cubicle or the like installed outdoors, the main frame 4 and the sub-frame 5 are formed by the bolts 12 and the nuts 13 not only to prevent the window frame A from coming off but also to prevent rainwater from entering. It is necessary to tighten strongly. However, when the two frames 4 and 5 are fastened with the bolt 12 and the nut 13,
The hard fourth packing member 6d is compression-deformed and joined to the soft and thick second packing member 6b. When the fourth packing member 6 d completely compresses the second packing member 6 b across the edge of the window 2, this can be recognized by the hand when the nut 13 is screwed, so the fastening condition is adjusted at this stage, It is possible to avoid overtightening to the extent that deformation occurs at the fastening portions of the frame bodies 4 and 5, and a neat mounting state can be obtained. At this time, the outer peripheral edge of the transparent plate 3 is directly sandwiched and held by the first packing member 6a and the third packing member 6c over the entire circumference.

When the window frame A is mounted, the transparent plate 3 temporarily mounted on the main frame 4 tends to move slightly downward by the amount of the flexible gap. It is received by the cylinder nut 16 attached to the bolt 12.
Therefore, even if the transparent plate 3 is displaced up and down and left and right due to backlash when the sub-frame body 5 is bolted to the main frame body 4, the outer peripheral edge and the side of the screw shaft portion 12 a are not damaged.
Can absorb the impact and prevent it well.

When the window frame A is attached to the window 2 of the window plate 1, as shown in FIG. 2, the outer peripheral frames 7, 8 of the main frame 4 and the sub-frame 5 are connected to the second packing member 6b and the fourth packing member 6b. The edge of the window 2 is sandwiched via the packing member 6d. In particular, since the outer peripheral frame portion 7 of the outer main frame body 4 is tightly joined to the outside of the rim of the window 2 via the soft and thick second packing member 6b, it is possible to prevent rainwater from entering the inside from the corresponding portion. Can be prevented well. Moreover, since the locking groove 10 is formed on the inner surface of the outer peripheral frame 7 of the main frame 4 and is not formed so as to penetrate inside and outside, the bolt 12 is inserted from outside the outer peripheral frame 7. Also in this respect, the bolt head is finished in a neat appearance without being seen from the outside, and is advantageous in preventing rainwater from entering. Further, bolt 12 is used for window 2
Since it passes through the inside, it is possible to omit the process of drilling a bolt insertion hole in the wall plate 1 at the edge of the window 2, and the workability at the site is good.

(Second Embodiment) FIGS. 7 and 8 show a second embodiment of the window frame A according to the present invention. In this case, the packing 6 comprises three members. Of these, the first packing member 6
e is cut into a certain length, then formed into an annular shape by abutting both ends against each other and appropriately bonding, and formed into a U-shaped cross section having a circumferential groove 20 on the inner circumferential side, and has excellent flexibility (compressibility). Made of soft rubber material. This first packing member 6e
Is fitted to the outer peripheral edge of the transparent plate 3 from one end side, and fitted to the transparent plate 3 in the above-described manner, and then the locking groove 10 is formed on the inner surface on the back side of the outer peripheral frame 7 of the main frame 4. Temporarily adheres to the part closer to the inner circumference side with an adhesive. Then, the second packing member 6b is attached to the main frame 4, and the fourth packing member 6d is attached to the sub-frame 5.
Are adhered with substantially the same specifications as the first embodiment, respectively.
Other configurations are the same as in the first embodiment. The pan members 6e, 6b, and 6d may be integrally formed as a single member.

In addition, the main frame 4 and the sub-frame 5 may be made of metal, for example, stainless steel. The locking groove 10 to be formed in the main frame 4 does not necessarily have to be continuous in a circular shape as shown in the figure, and may be formed in a groove shape having a fixed length by limiting the position where the bolt 12 is provided. Alternatively, a mode in which the introduction portion 11 is opened on the inner peripheral side of the outer peripheral frame portion 7 of the main frame body 4 may be employed. Even when the locking groove 10 is formed in a circular shape,
The above-described introduction section 11 may be provided, for example, on each side, that is, at four places. The main frame 4 and the sub-frame 5 are annular.
This is a concept that includes all of a square, a circle, an ellipse, and the like.

The cylinder nut 16 may be formed of a soft plastic or rubber material to further improve the function of absorbing and mitigating the impact on the transparent plate 3. Since the screw can be screwed by fitting and turning to the part 12a, the inner screw does not have to be engraved on the inner peripheral surface in advance.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an essential part of a window frame in an exploded state.

FIG. 2 is a sectional view taken along line BB in FIG.

FIG. 3 is a front view in a state where a window frame is attached.

FIG. 4 is a rear view of the main frame.

FIG. 5 is a rear view of a main part of the main frame.

FIG. 6 is a front view showing a bolt and a cylinder nut.

FIG. 7 is a longitudinal sectional side view in a disassembled state showing a main part of a window frame in a second embodiment.

FIG. 8 is a longitudinal sectional side view of a main part showing an attached state of a window frame in a second embodiment.

[Explanation of symbols]

 Reference Signs List A Window frame 1 Wall plate 2 Window 3 Transparent plate 4 Main frame 5 Sub frame 6 Packing 6a First packing member 6b Second packing member 6c Third packing member 6d Fourth packing member 7 Peripheral frame of main frame 8 Outer peripheral frame portion of sub-frame body 10 Locking groove 11 Introducing portion 12 Bolt 12a Screw shaft portion 12b Stop seat 13 Nut 15 Through hole 16 Cylinder nut 16a Base end of cylinder nut

Claims (4)

(57) [Claims] 1. A window frame for attaching a transparent plate 3 to a window 2 provided on a wall plate 1. A pair of a main frame 4 and a sub-frame 5 disposed inside and outside the window 2 of the wall plate 1. The main frame 4 and the sub-frame 5 are each made of metal,
The outer peripheral frame portions 7 and 8 are formed in an annular shape having a predetermined width, and have an annular packing 6 interposed between the outer peripheral frame portions 7 and 8 of the main frame 4 and the sub-frame 5. A plurality of bolts 12 are provided on the inner surface of the outer peripheral frame portion 7 of the main frame body 4 at appropriate intervals in the circumferential direction. Each bolt 12 integrally has a locking seat 12b at a base end of a screw shaft portion 12a. A locking groove 10 is provided on the inner surface of the outer peripheral frame portion 7 of the main frame body 4. A locking seat 12 b of each bolt 12 slides along the locking groove 10 in the locking groove 10. It is movably fitted, but in a detent shape and outwardly in a detent shape, and is screwed to the screw shaft portion 12a of each bolt 12 to form a base end 16a.
Are provided with cylindrical nuts 16 that abut against the opening edges of the locking grooves 10. The sub-frame body 5 is provided with through holes 15 through which the screw shaft portions 12 a of the bolts 12 pass. By screwing a nut 13 to the tip of the screw shaft portion 12a of each bolt 12 from the back side of 5, the outer peripheral frame portions 7 and 8 of the main frame member 4 and the sub-frame member 5 are connected to the opening of the window 2 of the wall plate 1. A window frame that holds the edge from inside and outside via a packing 6 and holds the outer peripheral edge of the transparent plate 3 between both outer frame parts 7 and 8 via a packing 6. 2. The main frame 4 is formed by bending an extruded aluminum alloy material having a predetermined length into an annular shape and welding both ends thereof, and engaging the inner frame with the outer peripheral frame 7 of the main frame 4. A groove 10 is formed continuously over the entire circumference, and an introduction portion 1 for guiding and fitting a stop seat 12b of each bolt 12 into at least one position of the locking groove 10 in the locking groove 10.
2. The window frame according to claim 1, further comprising: 3. The first and second packing members 6a and 6b are annularly mounted on the inner surface of the outer peripheral frame portion 7 of the main frame member 4 with the locking groove 10 interposed therebetween. On the inner surface of the outer peripheral frame portion 8 of the frame body 5, third and fourth packing members 6c and 6d are annularly bonded inside and outside with a bolt 12 interposed therebetween, and the first packing member 6a and the third packing member. The window frame according to claim 1, wherein the outer peripheral edge of the transparent plate (3) is sandwiched by the member (6c), and the edge of the window (2) is sandwiched by the second packing member (6b) and the fourth packing member (6d). 4. A cylindrical nut 16 is formed of a vertically long plastic material or rubber material provided with internal threads on an inner peripheral surface, and an outer peripheral edge of the transparent plate 3 is screwed to a screw shaft portion 12a of the bolt 12. The window frame according to claim 3, which is received by the formed cylinder nut 16.