JP3173706U - Round window frame - Google Patents

Abstract

An object of the present invention is to provide a round window frame having an approximately U-shaped cross section having a horizontal piece and a vertical piece bent at right angles on both sides thereof, and is easy to manufacture, has good dimensional accuracy, and has excellent flatness. Provide a good round window frame.
A front-side round window frame 10a and an inner-side round window frame 10b have an outer vertical piece 20 that bends and extends at a right angle on one side of a horizontal piece 19, and an inner side that bends and extends at a right angle on the other side. A vertical piece 21 is provided. A cut groove 24 is formed in the bent portion, and each of the vertical pieces 20 and 21 is bent along the cut groove 24. The bent body obtained by bending in this way is cut into a predetermined length, rounded, and the cut portion is welded to obtain an annular round window frame.
[Selection] Figure 1

Description

  The present invention relates to an annular round window frame used for a window formed in a round shape.

  In order to attach a round window glass, an annular round window frame having a round shape as a whole is used (for example, see Patent Document 1). When forming such a round window frame, when using a long mold material with a substantially U-shaped cross section, this mold material must be bent into a circular shape. Production is often cumbersome due to distortions that cannot be made or generated. Therefore, in the round window frame described in Patent Document 1, three vertical wall portions are provided in a perpendicular direction to a wide horizontal piece to prevent distortion deformation.

  Conventionally, a round window frame is manufactured by bending a thin metal plate material without using a mold material, but there are various problems in this case as well. For example, a flat metal thin plate 1 as shown in FIG. 4A is bent, and as shown in FIG. 4B, for example, a horizontal piece 2 and a vertical piece 3 extending at right angles from both sides thereof are extended. The long bent body 4 is first formed, and at this time, each bent portion is usually provided with a large R so as not to cause material cracking. However, in this bent body, the vertical piece 3 spreads outward due to the influence of a spring back or the like, and the entire length is distorted or warped. In order to make a round window frame, as shown in FIG. 3C, the bent body 4 formed in a long shape is cut into a predetermined length and then further bent into a round shape, and both end faces are welded and joined. Must be circular. For this reason, since a large distortion occurs in the conventional structure, it is difficult to obtain the entire flatness, and it may not be possible to make it adhere to the door surface when attached to a door or the like. In addition, since the above-mentioned distortion causes the expected size and the appearance size (width and length) of the bent body to be formed uniformly, when cutting to a predetermined length, it is troublesome to mark the cut part. It is difficult to cut accurately. Moreover, since the bent portion is R, it is troublesome to accurately match the welding surfaces during welding, and polishing of the joint portions is difficult. In addition, when forming a mounting hole for mounting the round window frame to a door or the like, a jig is applied to the back surface of the frame body to make a hole. At this time, the bent portion is R, The positioning of the jig and the frame became unstable, and it was difficult to make a hole at an accurate position. Furthermore, when attached to a door or the like, the corners of the frame were rounded, so the appearance was not good.

Japanese Utility Model Publication No. 58-29733 (FIGS. 2 and 7)

  The problem to be solved by the present invention is that the round window frame formed by bending the metal thin plate material as described above does not cause the above-described distortion, can be easily and accurately manufactured, and can be attached to the door or the like. It is to provide a round window frame.

  According to the present invention, a horizontally long thin metal plate material is bent to form a horizontal piece and a bent piece having a substantially U-shaped cross section having a vertical piece extending at right angles from both sides thereof. In a round window frame formed in a circular shape by bending both ends thereof in a circular shape, a cut groove is provided in a bent portion of the horizontal piece and the vertical piece, and the horizontal piece and the vertical piece are bent along the cut groove. The above-mentioned problem is solved.

  The present invention is configured as described above, and forms a folded body having a substantially U-shaped cross section having a horizontal piece and a vertical piece extending at right angles from both sides by bending a horizontally long sheet metal material. In a round window frame formed by bending a bent body in a circular shape by connecting both ends thereof, a cut groove is provided in the bent portion of the horizontal piece and the vertical piece, and the horizontal piece and the vertical piece are bent along the cut groove. Therefore, it becomes possible to bend the corners of the bent portions so that they are bent at an acute angle, and to produce a long bent body without causing a springback of the vertical piece, overall warping, large distortion, etc. It can be formed almost linearly. Therefore, even when cutting to a predetermined length in order to bend it round, the scribing work can be cut into a simple and accurate length, and the corners are clearly formed when welding with the cut surfaces aligned. If welding is performed according to the corners, the welding operation is significantly facilitated. When forming a mounting hole using a jig, the jig can be precisely drilled by aligning the jig exactly at the corner, and it is easy to grind, and when mounted on a door, etc., the flatness is high, so mounting is accurate. Even after installation, the corners are bent at an acute angle, so the appearance is good and the appearance looks clean.

Sectional drawing which shows one Example of the window which uses the round window frame of this invention. The side view of FIG. Explanatory drawing of the manufacturing process of the round window frame of this invention. Explanatory drawing of the manufacturing process of the conventional round window frame.

  1 and 2 show an embodiment of a window using the round window frame 10 of the present invention. An annular front side round window frame 10a and an inner round window frame 10b are attached so as to be attached to an opening formed in the door 11. FIG. The front side round window frame 10a is screwed through the mounting holes 12 of the front side round window frame 10a and the base side round window frame 10a is screwed to the base reinforcing piece 14, and the round window glass 16 whose periphery is protected by the packing 15 is applied from the inside. Further, the inner round window frame 10 b is mounted from the inside, and the mounting hole 17 is screwed to the base reinforcing piece 14 through the screw 18 and fixed to the door 11.

  The front side round window frame 10a and the inner side round window frame 10b include a horizontal piece 19, an outer vertical piece 20 that is bent and extended at a right angle so as to hide the periphery of the opening from one side of the horizontal piece 19, and the horizontal piece 19 In order to hold the window glass 16 from the other side of the piece 19, it is formed in a substantially U-shaped cross section having an inward vertical piece 21 which is bent and extended at a right angle, and the inner vertical piece 21 of the front side round window frame 10a is formed. An inner horizontal piece 22 for fixing to the base reinforcing piece 14 is bent and extended at the tip.

  The front round window frame 10a and the inner round window frame 10b are formed by bending a base 23 made of a horizontally long thin metal plate material having an end face as shown in FIG. A cut groove 24 extending in the longitudinal direction is formed in the base material 23 at a position corresponding to a bent portion of the horizontal piece 19 and the vertical pieces 20 and 21. The kerfs 24 are provided in each bent portion in the embodiment shown in the figure, but may be provided only in one of the bent portions, for example, the bent portion of the outer vertical piece 20 and the horizontal piece 19. Moreover, although the shape is formed in substantially V shape, you may form in U shape etc.

  Next, when the base material 23 is bent along the kerf 24, a bent body 25 in which the bent portion is bent at an almost acute angle is formed as shown in FIG. As shown in FIG. 3C, the bent body 25 has a linear shape with almost no distortion or warping. And if this bending body 25 is cut to predetermined length, is curled roundly, and the cut part of both ends is match | combined and it welds, an annular round window frame will be obtained. Then, a jig may be applied to the back surface to make a mounting hole, or polishing or painting.

  The above round window frame is easy to bend and round and does not cause large distortion or warping. Since it is simple and has high flatness, it can be accurately attached to the door, and the corners are also formed with acute angles, so the appearance is good.

10 round window frame 10a front side round window frame 10b inside round window frame 19 horizontal piece 20 outer vertical piece 21 inner vertical piece 24 kerf 25 bent body

Claims (3)

  Folding a horizontally long sheet metal material to form a horizontal piece and a vertical piece that is bent at right angles from both sides to form a substantially U-shaped cross section. In the round window frame formed in an annular shape, a cut groove is provided in a bent portion of the horizontal piece and the vertical piece, and the horizontal piece and the vertical piece are bent along the cut groove.   The round window frame according to claim 1, wherein an inner horizontal piece is formed at a tip of the vertical piece.   The round window frame according to claim 1 or 2, wherein the kerf is formed in a bent portion on one side of the horizontal piece.

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