JPH0481697B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application 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 oven.

Conventional technology A support device for a side-opening door in a box-type heating cooker such as a microwave oven or an oven is such that a hole is provided in the metal door body into which a hinge pin is rotatably inserted, and the hinge pin is combined with the hole 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.

In FIG. 5, a heating chamber front plate 2 having an opening 1 for entering and exiting food has a door 3 that closes this.
1 is a metal body 4 which is integrally provided with a viewing window having a large number of small holes in the center facing the opening 1 and a high-frequency attenuation groove formed in the shape of a frame around the periphery.
It has upper and lower hinge fittings 5 and 6 at one end, and a door body 7 that covers the entire hinge and is made of resin or other material with appropriate design considerations.

As shown in FIG. 6, 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 or the like 9.

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 installed near the tip of the hinge fittings 5 and 6.
is attached, and the hinge pin 11 is attached to the door body 4.
It is rotatably inserted into the In addition, the hinge pin 11
may be fixed to the door 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). As shown in FIG. 7, when attaching the upper hinge fitting 5 to the entire heating chamber, a square hole 13 is provided on the fitting side, and a flange surface 14 bent toward the back is formed on the upper left side of the heating chamber front plate 2. Equipped with
By providing a cut-and-raised portion 15 in this part and inserting the cut-and-raised portion 15 into the square hole 13, the hinge fitting 5 is positioned in the left-right direction. The flange 14 serves as a seat on which the metal fitting 5 is in equal contact, and the upper end surface 1 of the heating chamber plate 2 is located at a portion higher than this by dimension A.
6, 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 5 and the inner surface of the body 12. Therefore, if an unbalanced load is applied to the edge of the packaging box when the device is packaged, for example, by placing a foot on the packaging box, the body 12 is likely to deform downward due to the lack of a member to support the body 12 from below. . In addition, the voids serve as entry routes for dirt, dust, and pests, and are also clogged with food scraps 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, there is a method of pasting a urethane sponge 17 or the like on the hinge fitting 5 as shown in Fig. 6, but if the straight line length of the hinge fitting 5 is relatively long from the fixing point and the square positioning hole is 13, it is difficult to obtain a sufficient cross-sectional area for strength as a structural member, and when the door is opened and an external force is applied to the opening side end, the hinge fitting 5 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 a slight deformation of the hinge metal fittings may result in an extremely large displacement at the tip of the door, and even if it is not a permanent deformation, the hinge metal fittings
There is also the problem that the entire door swings up and down, causing the door itself to shake.

There is also a method of using the end faces in the width direction of the hinge 5 instead of the square hole 13 and having cut and raised end faces abut both end faces of the hinge member 5.
4 needs to be expanded laterally, resulting in an extra gap.

Also, if the A dimension matches the plate thickness of the hinge metal fitting 5, there will be no problem, but the strength around the square hole 13 will remain low, and realistically, the size and wall thickness of the door frame 7, as well as the door arch yoke device Due to size constraints, it was difficult to achieve an optimal design.

Means for Solving the Problems The present invention solves the above-mentioned conventional drawbacks, and includes a heating means, a heating chamber for storing an object to be heated, and a front opening provided in the front plate of the heating chamber, which can be opened and closed. A square hole is provided on the upper surface of the hinge metal fitting to regulate the horizontal mounting position of the upper hinge metal fitting that supports this door, and a vertical wall is formed by bending or cutting up the upper surface of the hinge metal fitting. The top surface of the vertical wall portion is in contact with the inner surface of an outer shell material such as a body, and the lower end surface of the hinge fitting is in contact with a hinge fitting mounting surface of the front plate of the heating chamber. be.

Function Conventionally, when looking at a cross section passing through a square hole, the cross-sectional area of this part is the smallest, and this combined with the notch effect of the square hole reduces the strength, but the rise across this square hole part By providing a section or a raised section, the section modulus can be increased and the strength against bending and torsion can be significantly increased.Both the upper and lower surfaces of the hinge metal fitting are in contact with the body on one side and the flange surface of the front plate of the heating chamber, Since the top and bottom are held down by metal surfaces, the stiffness resistance and the degree of freedom against vertical movement are restricted.
The support strength against external forces applied to the door is increased.

In addition, since the above-mentioned gap is sealed,
This has the effect of preventing the intrusion of foreign substances such as dust, dirt, pests, etc., reducing the unsightly appearance, and since the body 12 is directly supported from below, it is possible to prevent the body from deforming downward.

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

FIG. 1 shows a first embodiment, in which a hinge fitting 5a is bent so as to have a vertical wall surface 18 approximately in the middle of an upper square hole 13a. The dimension between the upper surface 19 of the metal fitting and the lower surface 20 of the metal fitting corresponds to the above dimension A. The reason why the square hole 13a is longer in the depth direction than the cut-and-raised part 15 to be positioned is that it is more convenient to move the hinge fitting 5a back and forth when installing and fixing the door.

FIG. 2 shows a second embodiment, in which, unlike the first embodiment, vertical walls 21 and 22 provided on the left and right sides of the square hole 13b on the hinge metal fitting 5b are located at different positions on the left and right sides of the square hole 13b. This increases the strength against torsion.

FIG. 3 shows a third embodiment, in which upward cut-and-raise 23 is formed on the left and right end surfaces of the square hole 13c.
It is provided parallel to the depth direction of c. At this time as well, the dimension between the upper end of the cut and raised 23 and the lower surface of the metal fitting is the dimension A. By providing this cut and raised portion 23 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 raised at both left and right ends of a hinge fitting 5d, and vertical walls 24 are cut and raised at the inner end of the square hole 13d to form a right angle to the cut and raised walls 24. Cut and raise 25
The cut-and-raised part 25 has a square hole 13d.
It may be the front end of the These cut-up 2
4 and 25 both have the same height. Third
Similar to the example, 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 the position can be controlled 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 walls are bent or cut in areas where the strength is weak, increasing the strength against bending and torsion caused by the force applied to the tip of the door 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 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 the drawing]

FIGS. 1 to 4 are perspective views of a hinge fitting of a door support device of a heating device in an embodiment of the present invention, respectively;
Figure 5 is a perspective view of a conventional box-type heating cooker;
The figure is a partial sectional view of a conventional hinge part, and FIG. 7 is a perspective view of the same hinge part. 5a, 5b, 5c, 5d...hinge metal fittings, 7...
... Door frame, 11 ... Hinge pin, 12 ... Body, 13 ... Square hole, 18 ... Vertical wall, 21, 22
...Vertical wall, 23...Cut up, 24, 25...
...Cut it up.

Claims (1)

[Claims] 1. A heating means, a heating chamber for storing an object to be heated,
It consists of a side-opening door that can be opened and closed freely to cover the front opening provided on the front plate of the heating chamber, and a square hole is provided on the upper surface of the hinge metal fitting to regulate the mounting position in the left and right direction of the upper hinge metal fitting that supports this door. Further, a vertical wall portion is provided on the upper surface of the hinge fitting by bending or cutting, the top surface of the vertical wall portion is in contact with the inner surface of an outer shell material such as a body, and the lower end surface of the hinge fitting is placed in front of the heating chamber. A door support device for a heating device configured to abut against the hinge mounting surface of a plate.