Support structure of opening / closing door

Abstract

To improve durability of a hinge for supporting an opening / closing door.SOLUTION: A hinge 40 includes: a fitting part 52 formed along a front face 20C of a heat insulation box body 20 and fitted to the front face 20C of the heat insulation box body 20; a plate-like base part 50 projecting forward from the fitting part 52; a shaft part 44 erected on one side face (upper face) of the base part 50 and pivotally supporting opening / closing doors 14L, 14R; and two ribs 70, 72 erected on the other side face (lower face) of the base part 50, extending forward from the fitting part 52 and crossing each other. When the opening / closing doors 14L, 14R are opened, a part of the opening / closing doors 14L, 14R is abutted on the base part 50 or an edge part of the rib 70 so as to restrict the rotation in the opening direction of the opening / closing doors 14L, 14R.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a support structure for an opening / closing door that can open and close an opening of a box. [Background technology]

[0002] The following Patent Document 1 discloses a storage cabinet, which is provided with a support structure for an opening / closing door that supports the opening / closing door by a hinge relative to an opening on the front side of a box body. This support structure for the opening / closing door is configured such that, for the purpose of strengthening the mounting portion of the hinge, a mounting plate is disposed across the inner side of the intersection of the horizontal and vertical frames that form the corners of the opening, and a plate provided with a hinge pin or the like is fixed by fasteners at the mounting plate's mounting positions on the horizontal and vertical frames. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-257835 Summary of the Invention [Problem to be solved by the invention]

[0004] In the storage facility disclosed in the above Patent Document 1, the hinge is configured so that a part of the open door abuts against it to prohibit the door from rotating in the opening direction. When the door abuts against the hinge, the hinge receives a torsional load from the force received from the abutting part of the door and the force received from the shaft supporting the door. In other words, when a structure is provided in which a part of the door abuts against the hinge to prohibit the door from rotating in the opening direction, the durability of the hinge becomes an issue.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the durability of a hinge that supports an opening and closing door. [Means for solving the problem]

[0006] In order to solve the above problems, the storage facility disclosed in the present application has the following configuration. (1) A support structure for an opening / closing door that supports the opening / closing door by a hinge so that the opening / closing door can be opened and closed relative to a front opening of a box body, The hinge is An attachment portion formed along a front surface of the box body and attached to the front surface of the box body; a plate-shaped base portion protruding forward from the mounting portion; A shaft portion that is erected on one side surface of the base portion and supports the opening and closing door; Two ribs are provided on the other surface of the base portion, each extending forward from the mounting portion and intersecting with each other; having A support structure for an opening / closing door in which, when the opening / closing door is opened, a part of the opening / closing door abuts against an edge of the base portion or the rib, thereby restricting the opening / closing door from rotating in the opening direction.

[0007] The storage facility having the above-mentioned configuration can be embodied in various forms as shown below. Note that the present invention is not limited to the following forms, and can be embodied in various forms with various modifications and improvements based on the knowledge of those skilled in the art.

[0008] (2) A support structure for an opening / closing door as described in (2), wherein the axis of the shaft portion is formed so as to be located between the two ribs, forward of the point where the two ribs intersect.

[0009] (3) A support structure for an opening / closing door described in (1) or (2), in which, when the opening / closing door is opened, a part of the opening / closing door abuts against the front end of one of the two ribs, thereby restricting the rotation of the opening / closing door in the opening direction.

[0010] (4) A support structure for an opening / closing door according to (3), wherein one of the ribs extends in the same direction as the opening / closing door, the opening / closing door being restricted from pivoting in the opening direction, in a plan view. Effect of the Invention

[0011] According to the present invention, the durability of the hinge that supports the opening and closing door can be improved. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a front view of a cooling storage unit according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing a support structure for an opening / closing door, which is a main part of the embodiment, in a state in which the opening / closing door is closed. [Diagram 3] FIG. 2 is a perspective view showing a support structure for an opening / closing door, which is a main part of the embodiment, in a state in which the opening / closing door is open. [Figure 4] A plan view of a hinge that constitutes the support structure for the opening and closing door. [Diagram 5] Side cross section of the hinge (cross section AA in Figure 4) [Figure 6] FIG. 13 is a bottom view showing the support structure for the opening / closing door in a state where the opening / closing door is closed. [Figure 7] FIG. 13 is a bottom view showing the support structure of the opening / closing door in an open state. [Figure 8] CAE analysis results of the hinge in this embodiment [Figure 9] FIG. 1 is a perspective view of a hinge constituting a support structure for an opening and closing door of Comparative Example 1; [Figure 10] CAE analysis results of the hinge in Comparative Example 1 [Figure 11] FIG. 11 is a perspective view showing a hinge constituting a support structure for an opening and closing door of Comparative Example 2, viewed from above; [Figure 12] FIG. 11 is a perspective view showing a hinge constituting a support structure for an opening and closing door of Comparative Example 2, viewed from below. [Figure 13] CAE analysis results of hinge in Comparative Example 2 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] An embodiment in which the support structure for an opening / closing door of the present invention is adopted is a cooling storage cabinet 10 shown in Fig. 1. The cooling storage cabinet 10 of this embodiment will be described in detail below with reference to Fig. 1 to Fig. 13. The symbols F, B, L, R, U, and D shown in each figure respectively indicate the front and rear in the front-to-rear direction of the cooling storage cabinet 10, the left and right in the width direction when viewed from the front, and the upper and lower in the vertical direction.

[0014] As shown in FIG. 1, the cooling storage 10 of this embodiment is a two-door horizontal (table-type) refrigerator, and includes a horizontally long storage body 12, a pair of double-door doors 14L and 14R, and a top plate 16 arranged on the upper side of the storage body 12. The storage body 12 is mainly composed of an insulated box 20 having an opening 20A at the front, which is made up of an outer box, an inner box arranged inside the outer box, and a heat insulating material filled between the outer box and the inner box. Most of the internal space of the insulated box 20 is used as a storage chamber R1 for storing stored items, and the opening 20A of the insulated box 20 is an opening of the storage chamber R1. More specifically, the opening 20A of the insulated box 20 is divided into left and right by a center pillar 22, and the pair of opening doors 14L and 14R open and close the left and right openings of the center pillar 22, respectively. The pair of opening / closing doors 14L, 14R are heat-insulating doors filled with a heat insulating material.

[0015] Furthermore, in the cooling storage 10 of this embodiment, a cooler chamber is defined by a partition panel 24 (part of which is shown in FIG. 3) on the left side of the storage chamber R1 inside the insulated box 20. Although not shown in the figures, the cooling storage 10 of this embodiment is equipped with a refrigeration cycle type cooling unit, and a cooler constituting the cooling unit is housed in the cooler chamber, and is configured to suck in air from within the storage chamber R1, cool the air with the cooler, and send it out to the storage chamber.

[0016] The storage body 12 also has a number of panels assembled to the left of the insulated box 20. The panels are a side panel 25, a base panel 26, a front panel 27, etc., and the storage body 12 has a machine room R2 formed by the panels 25, 26, 27, the left side wall portion 20B of the insulated box 20, the top plate 16, etc. This machine room R2 houses the compressor, condenser, condenser fan, and an electrical box that controls the cooling storage 10, which constitute the cooling unit.

[0017] The cooling storage 10 of this embodiment is characterized by the support structure of the opening and closing doors 14L, 14R, so the support structure of the opening and closing doors 14L, 15R will be described in detail below. The left and right opening and closing doors 14L, 14R have the same configuration, so the left opening and closing door 14L will be used for the description. As shown in FIG. 1, the opening and closing door 14L is supported at its left edge by an upper hinge mechanism 30 and a lower hinge mechanism 32, and is rotatable around an axis extending along the left edge of the opening and closing door 14L. The support structure of the opening and closing door of the present invention is adopted in the lower hinge mechanism 32, and the lower hinge mechanism 32 will be described in detail with reference to FIGS. 2 to 7.

[0018] As shown in Figs. 2 and 3, the lower hinge mechanism 32 is composed of a hinge body 40 which is a main body supporting the opening / closing door 14L, and a hinge side collar 42 and a door side collar 43 which are interposed between the hinge body 40 and the opening / closing door 14L. As shown in Figs. 4 and 5, the hinge body 40 has an axle 44 which is an axis for rotating the opening / closing door 14L, and a base 46 on which the axle 44 is erected. The hinge side collar 42 is attached to the base 46 with the axle 44 inserted therethrough, and the door side collar 43 is attached to the lower surface of the opening / closing door 14L with the axle 44 inserted therethrough. The hinge side collar 42 and the door side collar overlap each other in a vertical contact state, and the opening / closing door 14L is smoothly rotated while maintaining a gap between the upper surface of the base 46 and the lower surface of the opening / closing door 14L.

[0019] A stopper 48 is fixed to the underside of the door 14L. The stopper 48 is an L-shaped member formed by bending a plate-like member, and is made up of an attachment portion 48a for fixing to the door 14L and a hanging portion 48b hanging from the front end of the attachment portion 48a, and the hanging portion 48b is fixed to a position that is substantially flush with the front surface of the door 14L. When the door 14L is opened, the hanging portion 48b of the stopper 48 abuts against the hinge body 40, and the hinge body 40 restricts the rotation of the door 14L in the opening direction.

[0020] The base portion 46 of the hinge body 40 has a plate-like base portion 50 that extends generally horizontally and on which the shaft portion 44 is erected, and an attachment portion 52 that extends downward from the rear end edge of the base portion 50 and is used for fixing the hinge body 40 to the front surface 20C of the thermal insulation box 20. The attachment portion 52 is a plate-like portion formed along the front surface 20C of the thermal insulation box 20, and has insertion holes 52a (see FIG. 8) formed through each of the left and right ends. The hinge body 40 is fixed to the lower corners of the front surface 20C of the thermal insulation box 20 by bolts 54 using the insertion holes 52a.

[0021] As shown in Fig. 4, the base portion 50 has the shaft portion 44 erected on the front end side. Also, as shown in Fig. 5, the base portion 50 has a stepped shape in which a tip end portion 50a on the tip side where the shaft portion 44 is formed is one step lower than a base end portion 50b on the mounting portion 52 side. A through hole 50c is formed behind the shaft portion 44 at the tip end portion 50a, and the above-mentioned hinge side collar 42 is attached using this through hole 50c.

[0022] The tip 50a of the base 50 has an arc portion 60 whose outer edge forms an arc shape centered on the shaft 44, and the stopper 48 fixed to the lower surface of the opening / closing door 14L rotates along the outer side of the arc portion 60. A portion 62 that extends linearly outward and rearward is formed on the side of the side wall 20B of the heat-insulating box 20 (on the left side in FIG. 4) of the arc portion 60. The front end surface of this portion 62 is flat, and serves as the abutment portion 62 that abuts against the stopper 48 (specifically, the hanging portion 48b) to restrict the rotation of the opening / closing door 14L in the opening direction.

[0023] As shown in Figs. 4, 6 and 7, the base portion 50 has a first rib 70 and a second rib 72 standing on the lower surface. The rear ends of these two ribs 70, 72 are connected to the mounting portion 52 and extend forward to the front end of the base portion 50. These two ribs 70, 72 are arranged to cross each other. More specifically, the front end surface 70a of the first rib 70 is flush with the abutting portion 62 of the base portion 50, and extends from that position rearward toward the center of the heat-insulating box body 20. Furthermore, as shown in Fig. 7, the extension direction of the first rib 70 is substantially the same as the extension direction of the opening and closing door 14L, the rotation of which in the opening direction is restricted. On the other hand, the front end 72a of the second rib 72 is located at a position closest to the center of the arc portion 60 of the base portion 50, and extends rearward from that position toward the side wall portion 20B of the insulated box body 20. In other words, the two ribs 70, 72 are inclined in opposite directions relative to the front-rear direction. As shown in Fig. 4, the shaft portion 44 is formed such that its axis 44a is located between the two ribs 70, 72, forward of the connecting portion 74 of the two ribs 70, 72.

[0024] Also, as shown in FIG. 4, the tip portion 50a of the base portion 50 has a widening portion 64 whose width in the left-right direction increases toward the base end portion 50b, and the first rib 70 is formed along the edge of this widening portion 64.

[0025] As described above, in the cooling storage 10 of this embodiment, the support structure for the opening / closing doors 14L, 14R is a support structure for the opening / closing doors that supports the opening / closing doors 14L, 14R by the hinges 40 so that the opening / closing doors 14L, 14R can be opened and closed relative to the front opening 20A of the thermally insulated box body 20. The hinge 40 includes an attachment portion 52 that is formed along the front surface 20C of the thermally insulated box body 20 and is attached to the front surface 20C of the thermally insulated box body 20, a plate-shaped base portion 50 that protrudes forward from the attachment portion 52, and one side of the base portion 50. The base portion 50 has an axle portion 44 that is erected on the first side surface (upper surface) and supports the opening / closing doors 14L, 14R, and two ribs 70, 72 that are erected on the other side surface (lower surface) of the base portion 50, each extending forward from the mounting portion 52 and intersecting each other, so that when the opening / closing doors 14L, 14R are opened, parts of the opening / closing doors 14L, 14R abut against the base portion 50 and the edge portion 70a of the first rib 70, thereby restricting the rotation of the opening / closing doors 14L, 14R in the opening direction.

[0026] The support structure of the opening / closing doors 14L, 14R in the present cooling storage cabinet 10 is premised on a configuration in which the hinge body 40 functions as a stopper for the opening / closing doors 14L, 14R when they are opened. That is, a part of the opening / closing doors 14L, 14R (the hanging part 48b of the stopper 48) that rotates in the opening direction abuts against a part of the hinge body 40; in this embodiment, the hinge body 40 abuts against both the abutment part 62 of the base part 50 and the front end surface 70a of the first rib 70, so that the hinge body 40 functions as a stopper for the opening / closing doors 14L, 14R. Due to such a configuration, when the opening and closing doors 14L, 14R abut against the hinge body 40, as shown in FIG. 4, forces F1, F2 from the opening and closing doors 14L, 14R act on the part of the hinge body 40 where the opening and closing doors 14L, 14R abut (abutment part 62) and the shaft part 44 supporting the opening and closing doors 14L, 14R, but the directions of the acting forces F1, F2 are different from each other. That is, the hinge body 40 receives a load that twists due to the forces F1, F2. According to the support structure in this embodiment, the hinge body 40 has two ribs 70, 72 connected to the mounting part 52 and the base part 50, and the two ribs 70, 72 are configured to cross each other, so that the load that twists can be suppressed and the durability of the hinge body 40 can be improved, as will be described in detail later. In addition, since this hinge body 40 is used in the lower hinge mechanism 32 of the opening / closing doors 14L, 14R, it has high rigidity against the vertical downward force received from the opening / closing doors 14L, 14R, and is effective for the opening / closing doors 14L, 14R of this embodiment, which are relatively heavy due to their insulating properties.

[0027] In addition, in the present cooling storage cabinet 10, the shaft portion 44 is formed so that its axis is located between the two ribs 70, 72, forward of the point 74 where the two ribs 70, 72 intersect.

[0028] According to this configuration, since the shaft portion 44 is located between the two ribs 70, 72 where twisting is suppressed, the force acting on the shaft portion 44 between the opening and closing doors 14L, 14R can be effectively suppressed.

[0029] In addition, in this cooling storage cabinet 10, when the opening / closing doors 14L, 14R are opened, a part of the opening / closing doors 14L, 14R (the hanging portion 48b of the stopper 48) abuts against the front end 70a of the first rib 70, thereby restricting the rotation of the opening / closing doors 14L, 14R in the opening direction.

[0030] According to this configuration, the force F1 input when the opening / closing doors 14L, 14R come into contact with each other can be received by the first rib 70 against which the opening / closing doors come into contact, so that the twisting of the hinge body 40 can be effectively suppressed. In addition, the front end surface 70a of the first rib 70 can increase the contact area with the opening / closing doors 14L, 14R, so that the load per unit area of ​​the contact portion of the opening / closing doors (the hanging portion 48b of the stopper 48) can be reduced, and wear of the contact portion can be suppressed. Furthermore, the front end 62 of the base portion 50 and the front end surface 70a of the first rib 70 are flush with each other, so that the contact area is increased and wear of the contact portion can be suppressed more effectively.

[0031] In addition, in the present cooling storage cabinet 10, the first rib 70 extends in substantially the same direction as the direction in which the opening and closing doors 14L, 14R, whose rotation in the opening direction is restricted, extend in a plan view.

[0032] According to this support structure, when the opening / closing doors 14L, 14R abut against the first rib 70, the force input to the first rib 70 is in approximately the same direction as the extension direction of the first rib 70; in other words, the incident angle of the force acting on the first rib 70 is small with respect to the extension direction of the first rib 70, so that the twisting load on the hinge body 40 can be effectively suppressed.

[0033] A CAE analysis was performed on the hinge 40 in the cooling storage 10 of this embodiment and the hinge 100 used in the support structure of Comparative Example 1 shown in FIG. 9, assuming that the open door 14L abuts and the same load is applied. First, the structure of the hinge 100 in the support structure of Comparative Example 1 will be briefly described. The hinge 100 in Comparative Example 1 includes an attachment portion 102, a plate-shaped base portion 104 extending forward from the attachment portion 102, and a shaft portion 106 erected on the upper surface of the base portion 104, similar to the hinge 40 in the above embodiment. In addition, a rib 108 is erected on the lower surface of the base portion 104, but in the hinge 100 of Comparative Example 1, a single rib is provided. The rib 108 extends vertically from the attachment portion 102 and is disposed directly below the shaft portion 106.

[0034] As can be seen by comparing FIG. 8 showing the analysis result of the hinge 40 in this embodiment with FIG. 10 showing the analysis result of the hinge 100 in Comparative Example 1, it can be seen that the displacement (tilt angle) of the shaft 44 of the hinge 40 in this embodiment is smaller than the displacement (tilt angle) of the shaft 106 of the hinge 100 in Comparative Example 1. When comparing the displacement amounts, the maximum displacement amount in this embodiment (displacement amount at the apex of the shaft 44 is 0.103 mm) is about 56% of the maximum displacement amount in Comparative Example 1 (displacement amount at the apex of the shaft 106 is 0.185 mm), and it was found that the twisting of the hinge 40 is effectively suppressed. Note that FIG. 8 and FIG. 10 (and FIG. 13 used in the following explanation) are not the results of calculating the above displacement amount, but the results of applying a load larger than the load that will actually act, and are the results of making it easier to visually grasp the deformation amount.

[0035] 11 and 12 show a hinge 120 employed in the support structure of Comparative Example 2. This hinge 120, like the hinge 40 in the above embodiment, includes an attachment portion 122, a plate-shaped base portion 124 extending forward from the attachment portion 122, and a shaft portion 126 erected on the upper surface of the base portion 124. In addition, a rib is formed along the periphery of the base portion 124 of the hinge 120. In detail, a first rib 128 is formed on the lower surface of the base portion 124 in a portion along the inner side from the front end of the base portion 124 (the center side of the heat-insulating box 20, the right side in Figs. 12 and 13), and a second rib 130 is formed on the upper surface of the base portion 124 in a portion along the outer side of the base portion 124 (the side wall portion 20B side of the heat-insulating box 20, the left side in Figs. 12 and 13). The ends of the first ribs 128 and the ends of the second ribs 130 are formed to overlap in the up-down direction, and the base portion 124 has ribs formed around its entire periphery.

[0036] A CAE analysis was also performed on the hinge 120 of Comparative Example 2. As shown in Fig. 13, which is the analysis result, it can be seen that the displacement of the shaft portion 126 is effectively reduced compared to the hinge 100 of Comparative Example 1. Although the hinge 120 of Comparative Example 2 also achieved an effect similar to that of the hinge 40 of the present embodiment, it was found that the hinge 40 of the present embodiment was superior.

[0037] <Other embodiments> The present invention is not limited to the above-described embodiment, and can be embodied in various forms with various modifications and improvements based on the knowledge of those skilled in the art. For example, the following embodiments are also included within the technical scope of the present invention.

[0038] In the above embodiment, the open doors 14L, 14R are configured to abut against both the base portion 50 and the first rib 70 of the hinge body 40, but this is not limiting. For example, the doors may abut only against a portion of the base portion 50, or may abut only against the front end surface 70a of the first rib 70. When the doors abut against the base portion, they are not limited to abutting against the outer edge of the base portion, and may abut against a protrusion provided on the base portion.

[0039] In the above embodiment, the support structure for the opening and closing door was adopted for the table-type cooling storage cabinet 10, but it can also be adopted for other heat-insulating storage cabinets equipped with pivoting opening and closing doors. Furthermore, it is not limited to storage cabinets, but can be widely adopted for a configuration in which an opening and closing door is supported by a hinge on a box body having an opening on the front side. [Explanation of symbols]

[0040] 10... refrigerated storage, 14L, 14R... opening and closing doors, 20... insulated box body (box body), 20A... opening, 20C... front surface, 40... hinge body (hinge), 44... shaft portion, 50... base portion, 52... mounting portion, 62... abutment portion, 70... first rib, 70a... front end surface, 72... second rib

Claims

1. A support structure for an opening / closing door that supports the opening / closing door by a hinge so that the opening / closing door can be opened and closed relative to a front opening of a box body, The hinge is An attachment portion formed along a front surface of the box body and attached to the front surface of the box body; a plate-shaped base portion protruding forward from the mounting portion; a shaft portion that is erected on one side surface of the base portion and supports the opening / closing door; two ribs provided on the other side surface of the base portion, each extending forward from the mounting portion and intersecting with each other; having A support structure for an opening / closing door in which, when the opening / closing door is opened, a part of the opening / closing door abuts against an edge of the base portion or the rib, thereby restricting the opening / closing door from rotating in the opening direction.

2. 2. The support structure for an opening / closing door according to claim 1, wherein the shaft portion is formed so that its axis is located between the two ribs and in front of a point where the two ribs intersect.

3. A support structure for an opening / closing door as described in claim 1 or claim 2, wherein when the opening / closing door is opened, a part of the opening / closing door abuts against a front end of one of the two ribs, thereby restricting the rotation of the opening / closing door in the opening direction.

4. The support structure for an opening / closing door according to claim 3 , wherein one of the ribs extends in the same direction as the opening / closing door, the opening / closing door being restricted from pivoting in the opening direction, in a plan view.

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