JPH0445021Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a pivot structure for an opening/closing door, and more specifically, for example, a pair of upper and lower opening/closing doors that close an opening of a housing such as a refrigerator. In the hinge, the lower hinge and the stopper, which is fixed to the opening/closing door and comes into contact with the lower hinge to restrict opening of the door, are configured so that they can be commonly used for doors that open in either the left or right direction. It is related to the pivot structure.

Prior Art A housing 10, such as a refrigerator, which has an opening and an article storage space inside, is composed of an outer frame 12 and an inner box 14 defining the interior of the refrigerator, as shown in FIG. A heat insulating material 16 is interposed between the outer frame 12 and the inner box 14. Further, on the front side of the inner box 14, a rectangular surrounding frame 18 defining an opening is provided.
are arranged by adhesive or other means. Horizontally extending hinges 20 and 22 are arranged and fixed on one vertical edge of the surrounding frame 18 in a vertical relationship, and a pin 24 and a pin 24 projecting vertically from the hinges 20 and 22
26 are respectively inserted into respective through holes correspondingly formed in the upper and lower end surfaces of the illustrated opening/closing door 28, so that the door 28 is pivotally supported relative to the refrigerator main body so as to be freely openable and closable.

A stopper 30 is fixed to the lower end surface of the door 28, as shown in FIG. It is configured to be regulated within Further, in order to prevent the attachment of the lower hinge 22 to the peripheral frame 18 from loosening due to the load when the lower hinge 22 and the stopper 30 come into contact with each other, a reinforcing plate is installed on the inner surface of the peripheral frame 18.
1 is arranged.

By the way, the door 28 supported by the upper and lower hinges 20 and 22 has a structure in which most of the load is applied to the lower hinge 22 when the door 28 is open. Therefore, when the door 28 is opened, the stopper 30 provided on the door 28 is moved against the lower hinge 22.
When the opening of the door is restricted by coming into contact with the lower hinge 22 and the surrounding frame 18, a considerably large impact (tensile load) is applied to the lower hinge 22 and the surrounding frame 18. Therefore, if the impact is repeated, cracks will occur in the adhesive surface between the surrounding frame 18 to which the lower hinge 22 is attached and the inner box 14, and water or the like will penetrate into the heat insulating material 16 from the cracked area, resulting in insulation. This was a cause of deterioration in performance. In order to deal with such a case, the surrounding frame 18
The reinforcing plate 31 is disposed on the inner surface of the reinforcing plate 31, but if the reinforcing plate 31 is not thick enough, there is a problem that the cracks will occur over time.

Therefore, in order to deal with the above-mentioned problem,
For example, as disclosed in Japanese Utility Model Application Publication No. 51-126467, a first horizontal part fixed to the bottom of the refrigerator outer casing, a second horizontal part extending to the front of the outer casing, and both horizontal parts are integrally connected. A pivot structure has been proposed in which a lower hinge is constructed from a connecting portion and a hinge pin disposed on the bottom surface of the door is pivoted to the second horizontal portion. That is, since the lower hinge is fixed to the bottom of the refrigerator outer casing, the impact resistance of the lower hinge is improved, and cracks are prevented from occurring in the surrounding frame of the refrigerator due to the impact when the stopper and the hinge come into contact. It is something that can be done.

Problems that the invention aims to solve By the way, refrigerators and the like come in two types, one with a door that opens to the right and one that opens to the left, so that the refrigerator can be installed on either the left wall or the right wall depending on the installation location. It is now possible to choose. However, the hinge and stopper according to the conventional example described above can only be used for either a right-hand door or a left-hand door. It was necessary to prepare different types. This requires separate press-cutting dies for the left and right sides, which has the disadvantage of increasing production costs. Furthermore, in connection with this, when assembling a refrigerator or the like, it is necessary to check the left and right sides of the hinges and stoppers, which requires a lot of trouble.

Purpose of the invention This invention was proposed in view of the above-mentioned drawbacks inherent in the prior art, and was proposed in order to suitably solve the problems. To provide a pivot structure for an opening/closing door that can use a stopper for both left-handed and right-handed doors.

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention consists of an upper hinge disposed above the opening of the casing, and a first hinge fixed directly to the bottom of the casing. a lower hinge composed of a horizontal part and a second horizontal part integrally connected to one end of the first horizontal part via a connecting part and extending horizontally in front of the opening; In the pivot structure of the opening/closing door that supports the opening/closing door so as to be freely openable/closable, a pivot pin is provided protruding from the center of a protrusion formed at the free end of the second horizontal part of the lower hinge, and the second horizontal part is provided with a pivot pin. stopper abutting portions are formed symmetrically on both sides across the protrusion at the free end of the stopper, and the stopper is fixed to the lower end surface of the opening/closing door;
The present invention is characterized in that a stopper portion is provided that comes into contact with either of the stopper contact surfaces to restrict opening of the door within a predetermined angle.

Example Next, regarding the pivot structure of the opening/closing door according to the present invention,
Preferred embodiments will be described below with reference to the accompanying drawings. Note that the same members that have already been shown in the refrigerator described in connection with FIGS. 9 and 10 will be designated by the same reference numerals. Further, an example in which the opening/closing door is pivoted to open to the right with respect to a housing of a refrigerator or the like will be described.

FIG. 1 is a side view of a refrigerator that employs a pivot structure for an opening/closing door according to an embodiment of the present invention. A pair of hinges 2 arranged and fixed horizontally at the upper and lower positions of one vertical end of the housing 10
0 and 22 so that it can be opened and closed. That is, the upper hinge 20 is fixed horizontally in the upper and lower positions,
Further, a lower hinge 22, which will be described in detail later, is horizontally fixed to the bottom surface of the outer frame 12 of the housing 10, and an opening/closing door 28 is supported by pivot pins 24 and 26 protruding from each hinge.
It has come to support the In addition, the opening/closing door 2
A stopper 30 is fixed to the bottom surface of the door 8, which cooperates with the lower hinge 22 to restrict the opening angle of the door 28 within a predetermined range.

As shown in FIG. 2, the lower hinge 22 has a first horizontal portion 22b serving as a lower stage for directly fixing the lower hinge 22 to the bottom surface of the housing 10, and an upper stage with a pivot pin 26 protruding from it. A second horizontal portion 22a,
The connecting portion 22c integrally connects both the horizontal portions 22a and 22b. That is, the first horizontal portion 22b is directly fixed to the bottom surface of the outer frame 12 of the housing 10, and is provided with a plurality of screw holes 34 as shown in the figure. This screw hole 34 is
Screw holes 34 are drilled symmetrically on the left and right sides of the center line M extending in the longitudinal direction of the lower hinge 22, and are located at diagonal positions depending on the mounting position of the opening/closing door 28 (left opening, right opening). 34 is used.

A semicircular protrusion 36 is formed at the free end of the second horizontal portion 22a, and a pivot pin 26 is protruded from the center portion of the upper surface of the protrusion 36 through which the center line M passes. Further, stopper contact surfaces 38, 38 are formed symmetrically on both sides of the second horizontal portion 22a, sandwiching the protrusion 36 at the free end thereof, and are configured to engage and abut with a stopper 30, which will be described later.

Note that since the connecting portion 22c of the lower hinge 22 constitutes an inclined surface, when the opening/closing door 28 is pivotally supported on the second horizontal portion 22a, the load of the door 28 is distributed and the lower hinge 22 and This is designed to prevent stress from concentrating on the connection surface of the outer frame 12. Further, since the upper surface bent portion defining the boundary between the first horizontal portion 22b and the connecting portion 22c is formed at an obtuse angle without having a radius, this bent portion is pressed against the lower edge of the outer frame 12. Just by touching it, the mounting position of the lower hinge 22 is automatically determined. Both end edges 32, 32 of the lower hinge 22 are reinforced by being bent downward in a U-shape in cross section.

Further, a support plate 40 is fixed to the inner lower end of the opening/closing door 28, and mounting holes 41, 41 for fixing stoppers are bored in the support plate 40. Further, a through hole 42 through which the pivot pin 26 protruding from the lower hinge 22 is inserted is formed at an appropriate position of the support plate 40. The stopper 30 is located at the second horizontal portion 22.
It engages and contacts the stopper contact surface 38 of a at a required door opening angle to regulate the opening of the door, and as shown in FIG. 2, it has a shape that is symmetrical with respect to the center line N. . A stopper part 46 is bent at one end in the direction of the center line N of the stopper 30 and can come into contact with the contact surface 38 at a required opening angle when the opening/closing door 28 is opened. (see Figure and Figure 8). Further, arc-shaped notches 44, 44 are formed at both longitudinal ends of the stopper 30 to prevent the stopper 30 from interfering with the hinge collar 48 inserted into the pivot pin 26 when the door 28 is opened or closed. .

4 to 6 show another embodiment of the lower hinge used in the present invention. In the embodiment shown in FIG. 4, instead of forming the longitudinal end portion by bending to reinforce the lower hinge 22, a reinforcing rib 5 is provided on the lower surface of the lower hinge 22 along the longitudinal center line M.
It has a protruding 0. Further, in the embodiment shown in FIG. 5, a connecting portion 22c connecting the first horizontal portion 22b and the second horizontal portion 2a is arranged vertically, and substantially triangular reinforcing members are provided at both ends of the second horizontal portion 22a. 5
2,52 was formed. Furthermore, the embodiment shown in FIG. 6 has a first horizontal portion 22b and a second horizontal portion 22.
a and a vertical connecting portion 22c, and a reinforcing rib 50 is provided protruding from the lower surface of the lower hinge 22 along the longitudinal center line M of the lower hinge 22 for reinforcement. It goes without saying that all of the embodiments shown in FIGS. 4 to 6 are formed symmetrically with respect to the longitudinal center line M.

Effects of the Embodiment In the opening/closing door pivot structure according to the present invention configured as described above, as shown in FIGS. The second bolt is fixed to the bottom of the frame 12.
The horizontal portion 22a extends forward at the bottom of the housing.
At this time, if the door 28 opens to the right as shown in FIG. 3, the stopper 3 fixed to the lower edge of the door 28
0 is located on the left side of the pivot pin 26 in the door closed state.

Next, when the opening/closing door 28 is rotated in the opening direction around the pivot pin 26, the stopper portion 46 of the stopper 30 is formed on the lower hinge 22 after opening by the required center angle, as shown in FIG. The opening of the door 28 is restricted by contacting the contact surface 38 . The impact load that occurs at this time is applied to the lower hinge 22.
is directly received by the outer frame 12 to which it is fixed,
No impact is transmitted to the adhesive surface between the surrounding frame 18 and the inner box 14. Therefore, cracks do not occur in the bonded surface between the surrounding frame 18 and the inner box 14, and water or the like does not penetrate into the heat insulating material 16 through the cracks, thereby preventing deterioration of the heat insulating performance. Furthermore, since the lower hinge 22 and the stopper 30 are made bilaterally symmetrical with respect to the center lines M and N, respectively, as shown in FIGS. (Fig. 8) can be commonly used for both.

Effects of the invention According to the pivot structure of the opening/closing door according to the invention, as described above,
By forming the lower hinge and stopper symmetrically with respect to the center line, it can be commonly used for either left-hand or right-hand doors. Therefore, there is no need to manufacture and stock separate left and right parts, and mold costs can be reduced.
Furthermore, since each part does not have a left or right side, inventory management becomes easy, and there is no need to worry about mistaking left and right parts during assembly, which has practical effects such as shortening assembly time.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the opening/closing door pivot structure according to the present invention, and FIG. 1 is a side view of a refrigerator employing the opening/closing door pivot structure according to one embodiment of the present invention. , FIG. 2 is an exploded perspective view of the lower hinge and stopper according to the embodiment shown in FIG. 1, FIG. 3 is an assembled perspective view of the lower hinge and stopper shown in FIG. 2, and FIG. Figures 5 and 6 are
Fig. 2 is a perspective view showing different embodiments of the lower hinge, Fig. 7 is a bottom view of a right-hand swinging door, Fig. 8 is a bottom view of a left-hand swinging door, and Fig. 9 is a conventional Fig. 10 shows an example of a pivot structure for an opening/closing door in a refrigerator according to the technology, and Fig. 10 is a side view with the side plate removed, and Fig. 10 is a perspective view showing the lower hinge and stopper shown in Fig. 9 in an exploded state. It is a diagram. DESCRIPTION OF SYMBOLS 10... Housing, 20... Upper hinge, 22... Lower hinge, 22a... Second horizontal part, 22b... First
Horizontal part, 22c...Connection part, 26...Pivot pin,
28...Opening/closing door, 30...Stopper, 36...Protrusion, 38...Stopper contact surface, 46...Stopper portion.

Claims (1)

[Claims for Utility Model Registration] [1] The upper hinge 20 disposed above the opening of the housing 10, the first horizontal portion 22b directly fixed to the bottom of the housing, and one end of the first horizontal portion 22b. The lower hinge 22 includes a second horizontal portion 22a that is integrally connected via a connecting portion 22c and extends horizontally in front of the opening, and both hinges 2
In the pivot structure of the opening/closing door in which the opening/closing door 28 is supported so as to be openable/closable by the hinges 0 and 22, a pivot pin 26 is provided at the center of the protrusion 36 formed at the free end of the second horizontal portion 22a of the lower hinge 22. Stopper contact portions 38, 3 are provided protrudingly and symmetrically on both sides with the protrusion 36 at the free end of the second horizontal portion 22a in between.
8, and a stopper 30 fixed to the lower end surface of the opening/closing door 28 is provided with a stopper that comes into contact with either of the stopper contact surfaces 38, 38 to restrict opening of the door 28 within a predetermined angle. A pivot structure for an opening/closing door characterized in that a portion 46 is provided. [2] Arc-shaped notches 44, 44 are formed at both longitudinal ends of the stopper 30 in order to avoid interference with the hinge collar 48 inserted through the pivot pin 26 when the opening/closing door 28 is opened/closed. The pivot structure for an opening/closing door according to claim 1.