JPH0512657Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a shelf support device for supporting a shelf on a wall surface in an oven range, a microwave oven, a toaster oven, a refrigerator, etc.

<Prior Art> In general, this type of shelf support device involves inserting a clip part protruding from one side of a shelf support member into an opening on a surface to which it is attached, and then rotating the clip part to engage the edge of the opening. A structure that prevents it from falling out is used. According to this method, two steps of insertion and rotation are required, and therefore there is a problem that the assembly work efficiency is low.

Further, Japanese Utility Model Publication No. 62-47810 discloses a holder that fixes a clip portion by bending a tongue piece formed at the opening edge of the mounting surface. According to this, not only is it necessary to provide a tongue piece in advance at the edge of the opening, but also a step of bending the tongue piece after inserting the clip portion is included, so that assembly tends to be complicated.

Preferably, the support member can be reliably fixed to the surface to be attached by simply inserting the clip portion into the attachment hole. As such a shelf support device, a structure can be considered in which the leg portion of the clip portion is provided with an elastic claw portion that projects outward, and the claw portion is inserted into the attachment hole while being elastically deformed inward. According to this, the shelf support member is fixed to the mounting surface by restoring the elastic claw portion after insertion and engaging with the inner edge of the hole.

<Problems to be Solved by the Invention> By the way, shearing force from the inner edge of the attachment hole acts on the base end of the leg due to the load applied to the shelf board. If there is play in the fitting between the hole and the leg, a dynamic load will be applied, increasing the strength load on the fitting part. Therefore, it is preferable that the fit between the leg and the hole be as tight as possible.

However, in order to ensure sufficient engagement force of the shelf support member with the hole, the protrusion of the elastic claw part must be made large to some extent, but the hole must have a minimum size that allows this protrusion to pass through. If it is attempted to increase the tightness between the leg and the hole, the thickness of the leg inevitably becomes large, and it is conceivable that the rigidity thereof becomes excessively high.

On the other hand, the material for the shelf support member used in the heating chamber of a microwave oven or the like is required to have not only rigidity but also sufficient heat resistance since the temperature inside the heating chamber is relatively high. Therefore, PPS (polyphenylene sulfide) resin is suitable for this purpose.

However, since this PPS resin has a relatively low elastic limit, it has the disadvantage that the amount of deformation when inserting the clip portion into the mounting hole cannot be large enough. Therefore, it is extremely difficult to use PPS resin to ensure tightness between the leg portion and the hole, and to ensure ease of attachment of the clip portion to the attachment hole.

Therefore, the purpose of this invention is to provide a method that can be easily inserted into the opening of the mounting surface without sacrificing installation performance, even when using a material with relatively high rigidity and a small elastic limit. The object of the present invention is to provide a shelf support device that can be installed.

<Means for Solving the Problems> According to the present invention, the above-mentioned object is to provide a shelf support member comprising a support part for supporting a shelf board and a clip part integrally provided on one side of the support part. and a hole formed in the wall surface to which the clip is attached for insertion of the clip, the clip being substantially spaced apart from each other in the width direction in a direction perpendicular to the one side surface. two legs protruding in parallel and bendable in a direction in which the free ends approach each other with the proximal end as a fulcrum; A free end including a first protrusion that protrudes in the width direction only from the outer surface of the proximal end of each leg is placed on the proximal end of each leg, and the free end is retracted from the outer surface of the proximal end of each leg. an elastic claw integrally formed on each leg so as to be able to bend; and a thickness of each proximal end of the two legs greater than the maximum thickness of the elastic claw. , a rib formed only on opposing surfaces of the two leg parts, and a protrusion amount smaller than the protrusion amount of the leg part at a lower position of the two leg parts on the one side surface; a second protrusion protruding in the same direction as the leg, and the hole is sized to relatively tightly receive the proximal end portions of the two legs including the rib. This is achieved by providing a shelf support device characterized by comprising a leg attachment hole and a through hole for inserting the protrusion, which is dimensioned to relatively tightly receive the second protrusion. Ru.

<Function> With this arrangement, both the leg portion and the claw portion are elastically deformed inward, so that the amount of deformation of both is combined, resulting in a relatively large amount of deformation of the clip portion as a whole. Therefore, the shelf support member can be easily attached to the surface to be attached by simply inserting the clip portion into the attachment hole. Moreover, the rigidity of the leg can be appropriately set by the rib, and the proximal end of the leg can be substantially tightly fitted into the inner edge of the hole.
In addition to this, even if looseness occurs between the Yoshiba leg and its mounting hole due to machining accuracy,
The second protrusion protruding in the same direction as the leg portion is fitted into the through hole for insertion of the protrusion, so that backlash can be suitably prevented.

<Embodiments> The present invention will now be described in detail with reference to specific embodiments with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes an ordinary microwave oven, and a plurality of shelf support members 4 are appropriately attached to a vertical inner wall surface 3 of a heating chamber 2 at predetermined positions. The net shelf 5 is carried into the heating chamber 2 from the entrance 6 in the direction of arrow A, and the frame 7 of the net shelf 5 is placed on the frame support surface 8 of each shelf support member 4 as shown in FIG. be done.

As shown in FIG. 3, the shelf support member 4 is
A support portion 9 having a frame support surface 8 and one side surface 10 thereof
It consists of a clip part 11 formed in, for example,
It is integrally molded from PPS resin.

The clip portion 11 includes two symmetrical legs 12 protruding from the left and right edges of one side 10, and one cylindrical protrusion 13 (second protrusion) protruding from the lower end.
It consists of Each leg 12 has one side 10
It has opposed wall parts 14 that are spaced apart from each other and protrude substantially parallel to each other along the left and right side edges of the wall, and are opposed to each other inwardly along the upper and lower edges of each of these opposed walls 14. Ribs 15 and 16 extend in this direction. The free ends of both opposing wall portions 14 can be bent slightly inwardly toward each other by an external force.

An elastic claw portion 18a is formed in the center of each opposing wall portion 14 by a U-shaped slit 17 that is cut through the center portion and has a base end on the free end side of each opposing wall portion 14. . An outward protrusion 18b (first protrusion) is formed at the free end of each of these elastic claws 18a, and as shown in FIGS. 4 and 5, usually the opposing wall A protrusion 18b projects outward from the outer surface of the portion 14, and can be bent slightly in a direction to retract from the outer surface of the opposing wall portion 14 by an external force.

On the other hand, the inner wall surface 3 to which the shelf support member 4 is attached has a proximal end 19 of the leg portion 12 including ribs 15 and 16.
two mounting holes 20 that can relatively tightly receive the
A through hole 21 is provided which can receive the protrusion 13 relatively tightly. and each leg 12 and protrusion 13
are the corresponding mounting holes 20 and through holes 21, respectively.
inserted into.

As shown in FIG. 4, as each leg 12 is inserted into each mounting hole 20, each opposing wall 14
The outer opening edge of each mounting hole 20 abuts on the outer surface 22 of each protrusion 18b that protrudes outward from the outer surface of the mounting hole 20, respectively.

When the shelf support member 4 is pushed further, the mounting hole 20
Each leg 1 is
2 are each slightly bent inward about the proximal end 19, that is, in the direction of arrow C. At the same time, each elastic claw portion 18a bends slightly inward, ie, in the direction of arrow B, centering on the respective base end portion 23. Therefore, although the amount of deformation of the base ends 19 and 23 of the leg portion 12 and the elastic claw portion 18a is relatively small, the amount of deformation of the elastic claw portion 18a is Since the base end portion 23 is also displaced inward, the amount of deformation of both is compounded, and the amount of displacement of the outer surface 22 of the protrusion 18b becomes relatively large. Here, the maximum thickness dimension of the elastic claw portion 18a is determined by the height of the protrusion 18b portion, but the thickness dimension of the base end portion 19 of the leg portion 12 including the ribs 15 and 16 is larger than the height dimension of the protrusion 18b. Because of this setting, the protrusion 18b can easily pass through the attachment hole 20.

In this way, as shown in FIG.
When the elastic claw part 18 is inserted to the position where it contacts the
The leg portion 12 including the portion a is restored to its original shape, and the freest end 24 of each protrusion 18b engages with the opening edge of each attachment hole 20, thereby preventing the shelf support member 4 from coming off. At the same time, since the protrusion 13 fits into the through hole 21, the position of the shelf support member 4 is fixed at a predetermined position. Further, the load applied to the frame support surface 8 of the support portion 9 is sufficiently supported by both the legs 12 and the protrusion 13 that fit tightly into each of the attachment holes 20 and the through holes 21.

Although PPS resin was used as the material for the shelf support member in the above embodiment, various other materials such as polysulfone resin may be used depending on usage conditions such as temperature and load.

<Effects of the invention> As described above, according to the invention, the two legs arranged substantially parallel to each other and the elastic claws provided on each leg are elastically deformed, Since the amount of deformation is compounded and the actual amount of displacement of the protrusion that actually engages with the hole becomes large, it is possible to use a material with high rigidity and a low elastic limit without impairing the ease of installation. Assembling work efficiency is greatly improved. Furthermore, since the mounting hole and the base end of the leg fit tightly together, and the protrusion protruding in the same direction as the leg fits into the through hole, play is prevented and installation rigidity is improved. This is advantageous in terms of strength.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a microwave oven using a shelf support member according to the present invention. FIG. 2 is a partially enlarged cross-sectional view showing how the shelf support member of FIG. 1 is used. FIG. 3 is a perspective view of the shelf support member and mounting surface according to the present invention. FIG. 4 is a partial sectional view showing the shelf support member of FIG. 3 in an inserted state. FIG. 5 is a partial sectional view similar to FIG. 4 showing the mounting state of the shelf support member. 1...Microwave oven, 2...Heating chamber, 3...
Inner wall surface, 4...Shelf support member, 5...Net shelf, 6...
...Entrance, 7...Frame, 8...Frame support surface, 9...Support part, 10...One side, 11...Clip part, 12
... Leg part, 13 ... Protrusion, 14 ... Opposing wall part, 1
5, 16...Rib, 17...U-shaped slit groove,
18a...Elastic claw portion, 18b...Protrusion, 19...
Base end portion, 20...Mounting hole, 21...Through hole, 22
...outer surface, 23...base end, 24...free end.

Claims (1)

[Claims for Utility Model Registration] A shelf support member comprising a support part for supporting a shelf board, a clip part integrally provided on one side of the support part, and a wall surface to which the shelf board is attached to which the clip part is inserted. a shelf support device comprising a hole opened, the clip portions protruding in a direction perpendicular to the one side surface and spaced apart from each other in the width direction and substantially parallel to each other;
and two legs that can be bent in a direction in which the free ends approach each other with the base ends as a fulcrum, and the base ends are placed on the free ends of the two legs, and the base ends of these legs A free end having a first protrusion protruding in the width direction from only the outer surface of the leg is placed on the proximal end side of each leg, and the free end is bent in a direction to be retracted from the outer surface of the proximal end of each leg. an elastic claw portion integrally formed on each leg portion; a rib formed only on opposing surfaces of the two legs; and a rib formed at a position below the two legs on the one side with a smaller protrusion amount than the two legs in the same direction as the legs. a second protrusion, the hole being sized to relatively tightly receive a proximal end of each of the two legs including the rib; A shelf support device comprising a through hole for inserting the projection, which is dimensioned to relatively tightly receive the second projection.