JPS62102037A - Door support for heating device - Google Patents

Abstract

PURPOSE:To increase the strength against bending and twisting and the support strength against the external forces applied to a door by providing a bending work or a lifted edge so as to give a vertical wall that points upward over a rectangular hole section for right and left positionings provided on a metal hinge and making the upper end of the vertical wall abut against the inner face of a body when the metal hinge is placed against the flange face above the left front plate of a heating room. CONSTITUTION:A bending work is done to a metal hinge 5a so as to give a vertical wall face 18 approximately at the middle point of a rectangular hole 13a provided at the metal hinge 5a, and the dimension between the upper face 19 and the lower face 20 of the metal hinge is made equal to the instance between the upper end faces with which the flange face constituting a seat on which the metal hinge 5a sits and the inner face of the body contact. It becomes possible to determine position in the right-and-left direction by a lifted edge provided at a portion of the front plate of a heating room with which the metal hinge pairs, and at the same time when the door is opened, the strength against bending and twisting forces which are applied at the front end of the door for opening it is increased, and, furthermore, the left upper side gap in the front plate of the heating room is closed to keep dusts, harmful insects, foreign matter, etc. from intruding into the heating room or to prevent the leakage of the exhaust gas.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a support device for an openable/closeable door of a heating device such as a microwave oven or an electric opener.

Conventional technology A supporting device for a side-opening door in a box-type heating cooker such as a microwave oven or an open cooking device is to provide a hole in the metal door body into which a hinge pin can be fully rotated, and then combine the hole with the hinge pin to fix the hinge pin. A common configuration is that a hinge fitting is attached to the heating chamber side of the main body heating device, and an outer shell material such as a sheet metal body is placed over the outside of the hinge fitting.

5, 6, and 7, the specific structure of the microwave oven will be explained by taking as an example a microwave oven having a side-opening door.

A heating chamber front plate 2 having an opening 1 for entering and exiting food has a door 3 that closes it, and the door 3 faces the opening 1 and has a viewing window with a number of small holes in the center and a surrounding area. A metal body 4 is provided integrally with a choke groove for high frequency attenuation formed in the shape of a picture frame, and a hinge metal fitting 5°6 at the top and bottom is provided at one end, which further covers the entirety and is designed with appropriate consideration in terms of design. It has a door frame body 7 made of resin or other material.

The hinge fittings 5 and 6 are fixed to a member on the heating chamber side, for example, a heating chamber ceiling plate 8, etc., with screws 9 or the like.

The door frame 7 has a transparent plate 10 made of glass or resin in its center, through which the inside of the heating chamber can be seen through the small hole.

A hinge pin 11 is attached near the tip of the hinge fitting 6.6, and the hinge pin 11 is rotatably inserted into the door body 4. Note that the hinge pin 11 may be fixed to the door main body 4 side and rotatably inserted into the hinge fittings 5 and 6.

The body 12 covers the entire heating chamber, and its surface is set at least at the same height as the door frame 7.

(The same goes for the sides). When attaching the upper hinge fitting 6 to the heating chamber main body, a square hole 13 is provided on the fitting side, and a flange surface 1 bent toward the back is formed on the upper left side of the heating chamber front plate 2.
4, and a cut-and-raised part 16 is provided in a part of the square hole 13.
By inserting this cut and raised portion 16 inside, the hinge fitting 5 is positioned in the left-right direction. The flange surface 14
is a seat on which the metal fitting 6 comes into contact, and an upper end surface 16 of the heating chamber front plate 2 is located at a portion five dimensions higher than this, and the inner surface of the body 12 comes into contact with this.

Problems to be Solved by the Invention In the above configuration, a gap is created between the upper surface of the hinge fitting 6 and the inner surface of the body 12. Therefore, if an unbalanced load is applied to the end of the packaging box when the device is packaged, for example, by placing a foot on the box, the body 12 is likely to deform downward due to the lack of a member supporting the body 12 from below. In addition, the voids become an entry route for dirt, dust, and pests, and are also clogged with food particles and other substances, making them unclean.

Moreover, it is unsightly from the outside, and there is also a possibility that the exhaust gas that is guided backward from the side wall of the heating chamber may come out from this part to the front.

In order to prevent this, the hinge metal fitting 5 is
There is also a method of pasting urethane sponge 17 or the like on top, but since the straight line length of hinge fitting 6 is relatively long from the fixing point,
In addition, since it has a square positioning hole 13, it cannot obtain a sufficient cross-sectional area for strength as a structural member, and the hinge fitting 6, which applies external force to the opening end when the door is opened, is likely to be deformed.

In general, it is quite conceivable that force is applied to the tip of the door during normal use, and even a slight deformation of the hinge fitting may result in an extremely large displacement at the tip of the door, and even if it is not a permanent deformation, the hinge fitting 6 itself may be affected. There is also the problem that the entire door shakes up and down when the pres- ence occurs.

Although there is a method of using the end face of the hinge metal fitting 5 in the width direction as a substitute for the square hole 13, it is necessary to widen the flange portion 14 having the five dimensions laterally, which results in an extra widening of the gap.

Also, if the dimensions of the door frame 7 match the thickness of the hinge metal fitting 6, there will be no problem, but the strength around the square hole 13 is still low. It was difficult to make it optimal due to dimensional constraints.

Problems and Means for Solving the Problems The present invention solves the above-mentioned drawbacks of the conventional art.The present invention solves the above-mentioned drawbacks of the conventional art. A raised part is provided, the upper end of which comes into contact with the inner surface of the body when the hinge metal fitting contacts the upper left 7 flange surface of the front plate of the heating chamber.

When looking at the cross section passing through the working square hole, the cross-sectional area of this part is the smallest, and combined with the notch effect of the square hole, the strength is reduced, and by providing a rising part that spans this part, In addition to significantly increasing the strength against bending and torsion, both the top and bottom surfaces of the hinge metal fittings are in contact with the body on one side and the flange surface of the heating chamber front plate on the other, and the top and bottom are held down by metal surfaces, which reduces the stiffness of the hinge. In addition, the degree of freedom for the vertical movement is restricted, and the support strength against external forces applied to the door is increased.

In addition, since the above-mentioned gap is sealed, it is possible to prevent the intrusion of foreign substances such as dust, dirt, and pests, and to reduce the unsightly appearance. It can prevent the body from deforming downward from the shoulders.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment, in which a square hole 1 on the top surface of a hinge fitting 6a is shown.
A bending process is added to have a vertical wall surface 18 approximately in the middle of 3JL. Metal fitting top surface 19 and metal fitting bottom surface 20
The dimensions between the two correspond to the human dimensions above. In addition, square hole 13
The reason why a is longer in the depth direction than the other cut-and-raised part 15 to be positioned is because it is more convenient to move the door back and forth when installing and fixing the door.

FIG. 2 shows a second embodiment, which has a similar shape to the first embodiment, but vertical walls 21 and 22 provided on the left and right sides of the square hole 13b on the hinge fitting 5b are connected to the left and right sides of the square hole 13b. They are located in different positions in order to further increase the torsional strength.

FIG. 3 shows a third embodiment, in which cut-outs 23 facing upward are provided on the left and right end surfaces of a square hole 13C in parallel to the depth direction of the square hole 130. At this time as well, the dimension between the tip of the cut and raised 23 and the lower surface of the metal fitting is the dimension. By providing vertical walls in the longitudinal direction, the section modulus is significantly improved and the bending strength is improved.

FIG. 4 shows a fourth embodiment, in which vertical walls 24 extending in the longitudinal direction are cut and cut at both left and right ends of a hinge metal fitting 6d, and a vertical wall 24 is formed at a right angle to the cut and cut 24 at the inner end of the square hole 13d. A cut and raised cut 25 is provided so as to form a square hole 1.
3d front end. These cutting and raising 24.2
5 have the same height. Similar to the third embodiment, an improvement in the section modulus can be expected.

Effects of the Invention The door support device configured as described above has a square hole in the center, and makes it possible to regulate the position in the left and right direction by cutting and raising a part of the front plate of the mating heating chamber. At the same time, the vertical wall is bent or cut in the weakest part of the door, increasing its strength against bending and torsion caused by the force applied to the tip when the door is opened. , and because it is held between the front plate of the heating chamber and the body, and its movement in the vertical direction is restrained, the door can be opened and closed stably without vertical movement or wobbling. In addition, even if a downward external force is applied to the end face of the body, the body 2 is supported from below, which prevents deformation such as shoulder drop. In addition, since it fills the upper left gap of the front plate of the heating chamber where the hinge fittings are attached, it has the effect of preventing the intrusion of dirt, pests, foreign objects, etc., and preventing exhaust gas from leaking in the forward direction. be.

[Brief explanation of drawings]

1 to 4 are respectively perspective views of the hinge fittings of the door support device of the heating device according to the embodiment of the present invention, FIG. 6 is a perspective view of a conventional box-type heating cooker, and FIG. FIG. 7 is a partial cross-sectional view of the hinge portion, and FIG. 7 is a perspective view of the hinge portion. 5...Hinge fittings, 7...Door frame, 1
1... Hinge pin, 12... Body,
13... Square hole, 18... Vertical wall, 21
．． 22... Vertical wall, 23... Cut and raise,
24.25...Kiriori. Agent's name: Patent attorney Toshio Nakao and 1 other person 5 pieces---Hinge fittings 2/, 22-11-za-chojiku 23--Is everything up? 3 Figure 5 Figure 6

Claims (1)

[Claims] A cut-out is provided to have vertical parts on the left and right sides of the square hole provided to regulate the horizontal mounting position of the upper hinge fitting that supports the side-opening door, and the upper end surface of the cut-and-cut is attached to the inner surface of the outer shell material such as the body. A door support device for a heating device having a structure in which the lower end surface of the metal fitting is brought into contact with the hinge fitting mounting surface of the front plate of the heating chamber.