JP3453509B2 - Corner cover mounting structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching a corner cover to a corner of an opening of a heat insulating box.

[0002]

2. Description of the Related Art A general structure of an opening of a heat-insulating box is such that an inward bent portion formed at an opening edge of an outer box and an outward bent portion formed at an opening edge of an inner box are opposed to each other. It is formed by fitting a decorative frame so as to cover the surfaces of both bent portions. A foamed resin as a heat insulating material is filled between the two boxes, but there is a risk that the space between the two boxes will change due to the filling pressure. By fixing an L-shaped reinforcing metal fitting between the two bent parts, measures are taken so that the space between both boxes will not be disturbed even when receiving the filling pressure. On the other hand, when the reinforcing metal fittings are attached in this way, the reinforcing metal fittings interfere with each other and the end of the decorative frame cannot be extended to the corner so that it cannot be arranged. Furthermore, it is attached by covering the L-shaped corner cover.

Conventionally, as a mounting structure for this kind of corner cover, the applicant of the present application has proposed a structure described in Japanese Patent Application Laid-Open No. 8-152255. This is an L-shaped corner cover with a pair of elastic locking pieces projecting on the back side of one plate surface and a claw at the tip, and a locking hole opened on the side of the reinforcing metal to elastically lock the corners. By inserting the piece into the locking hole and elastically locking the pawl to the rim of the locking hole, the structure is attached in a retaining state.

[0004]

By the way, when the elastic locking piece of the corner cover is inserted into the locking hole of the reinforcing metal fitting, it is not always possible to insert it at a constant depth. For example, when the corner cover is mounted after foaming and filling the heat insulating material, the insertion depth of the elastic locking piece may vary depending on the hardness of the heat insulating material. Normally, the reinforcing metal fittings are fixed to the bent parts of the inner and outer boxes with screws, and the corner cover is fitted while a part of the corner cover is in contact with the bent parts. Depending on the winding condition when the malt plane is wound around the reinforcing metal fittings to prevent resin leakage, the mounting position of the reinforcing metal fittings with respect to the bent part may rise or fall, which also causes the insertion depth of the elastic locking piece into the locking hole. Is different.

However, since the conventional elastic locking piece is provided with only one pawl at the tip, if the insertion depth of the elastic locking piece is not constant as described above, for example, when it is too shallow. , If the claw cannot be locked to the rim of the locking hole and is too deep, there will be a gap between the claw and the rim of the locking hole, and the locking will be good in any case. Can not. That is, in the conventional case, there is a dislike of lacking certainty in locking the corner cover, and there is still room for improvement. The present invention was completed in view of the above circumstances, and an object thereof is to provide a mounting structure capable of securely locking and mounting a corner cover.

[0006]

As a means for achieving the above object, the invention of claim 1 is one in which two closing plates are orthogonal to each other at the corners of a rectangular opening formed in a heat insulating box. A structure for attaching a corner cover having an L-shaped cross section arranged in
On the back side of one of the closure plate in the corner cover with locking piece is projected, the projected been closed plate against which the side surface of the locking piece of the sides constituting the corner portion , A locking hole that allows the insertion of the locking piece is opened,
Also, the locking piece is an insertion body protruding from the closing plate.
And formed so that it will be folded back from the tip of this insertion body.
And a flexibly deformable flexure piece.
Contact is column set a plurality of locking teeth along the insertion direction
Ri, one of the locking teeth has a feature where the has a configuration that elastically engaged with the opening edge of the locking hole.

The invention of claim 2 is characterized in that, in the invention of claim 1, the tip of the locking piece is formed to be sharp. The invention of claim 3 is the invention of claim 1 or claim 2, forming surface of the engaging Tomeha before Symbol deflection piece, when the engaging teeth engages the rim of the locking hole It is characterized in that it is formed into a curved surface so that the bending deformation amount of the bending piece is substantially constant.

[0008] The invention of claim 4 is from claim 1 to claim
In any one of the inventions of 3 to 3, the bending piece is provided with a bending restriction portion that abuts on the insertion body and restricts a bending amount of the bending piece in a direction approaching the insertion body. It has characteristics. The invention of claim 5 is from claim 1 to
In the invention of any one of claims 4 to 6, the locking piece is
In a back-to-back position with the locking teeth facing outward
It is characterized by the fact that it is provided at intervals . Contract
A sixth aspect of the invention is the invention of the fifth aspect, wherein the both locks are provided.
Where the plug bodies of one piece are connected by the connecting part
It is characterized by

[0009]

<Advantages and Effects of the Invention><Invention of Claim 1> Since a plurality of locking teeth are arranged in a row on the locking piece, even if the depth of insertion of the locking piece into the locking hole is different. Any one of the locking teeth is locked to the rim of the locking hole, so that the corner cover can be securely attached. For example, a corner cover
When filling with insulation after mounting, the base of the bending piece
Insulation material gets into the gap between the
As it becomes a hook, the locking force for the corner cover increases.
You <Invention of Claim 2> For example, when the heat insulating material is first filled, the engaging piece can be smoothly inserted while biting into the heat insulating material .

<Invention of Claim 3 > While the respective locking teeth are sequentially engaged with the rim of the locking hole as the corner cover is inserted, the bending amount of the bending piece is kept substantially constant over the entire length. Therefore, it is easy to insert the corner cover. <Invention of Claim 4 > Since the locking piece is inserted and any one of the locking teeth is locked to the edge of the locking hole, the bending piece is restricted from bending toward the insertion body side. The locking force is increased, and the corner cover is also prevented from shifting laterally in the locking hole. By having a pair of locking pieces <invention of claim 5>, Ru can be well-balanced and firmly locking the corner cover. <Invention of Claim 6> Since both locking pieces are connected to each other and are prevented from opening, both locking pieces can be smoothly inserted into the locking holes.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. <First Embodiment> A first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 is a heat-insulating box body that constitutes a storage main body, and roughly includes an outer box 2 having an opening on one side and an inner box 3 having an opening on the other side with a space therebetween. A heat insulating material 4 (see FIG. 6) such as urethane foam is foam-filled between the boxes 2 and 3, and a decorative frame 6 is stretched between the opening edges of the boxes 2 and 3 to form the opening 7 Are formed. A heat-insulating partition frame 8 assembled in a cross shape is fitted into the opening 7, and thereby four inlets / outlets 9 are defined on the front surface of the heat insulating box 1. Corner covers 17 according to the present invention are attached to the four corners of each entrance / exit 9. In addition, each doorway 9
A heat-insulating door (not shown) is swingably opened and closed.

First, the case where the corner cover 17 is attached to the lower left corner of the lower left entrance 9 when viewed from the front will be described. At this corner, as shown in FIG. 2, the inward bent portion 1 bent inward at a right angle to the opening edge of the outer box 2.
1 is formed, and an outer bent portion 12 that is bent outward at a right angle is formed at the opening edge of the inner box 3 and faces the inner bent portion 11 with a predetermined gap. is doing. A heat insulating material 4 is provided between the bent portions 11 and 12 and between the boxes 2 and 3.
The reinforcing metal fitting 14 is attached for the purpose of preventing the gap between the boxes 2 and 3 from being deformed due to the filling pressure when the foam filling is performed. The reinforcing metal member 14 is formed by bending a metal plate material into an L-shaped cross section, and as shown in FIG. 3, its four corners are fixed to both the bending plates 11 and 12 by fasteners 15 such as screws or rivets. There is. The mounting position of the reinforcing metal member 14 is set such that the front side of the heat insulating box 1 is slightly retracted from the front side and the rear side is flush with the front side. Reinforcing metal fitting 14
In the part where is not attached, both bent parts 11, 12
The decorative frame 6 is fitted so as to cover the surface of the.
A slight gap is provided between the edge of the decorative frame 6 and the reinforcing metal fitting 14.

A corner cover 17 is attached so as to conceal the reinforcing metal member 14 described above. This corner cover 17
Is formed of a synthetic resin material, and has an L-shaped cross section in which two closing plates 18 are arranged at a right angle as shown in FIG. This corner cover 17 is formed with rounded corners on both front and back sides, and flanges 19 projecting to the back side are formed on the side edges of both closing plates 18, and both flanges 19 are located on the side of the reinforcing metal fitting 14. It is designed to fit outside the rim.

A rectangular locking hole 21 is opened on both sides of the reinforcing metal fitting 14 described above. The locking hole 21 on the vertical surface side may be removed. On the other hand, on the back surface of the horizontal closing plate 18 of the corner cover 17, a pair of locking pieces 22 is provided so as to project. As shown in FIG. 4, the locking piece 22 includes an insertion body 23 formed by hanging from the closing plate 18, and a bending piece 2 folded back in an oblique posture from a position outside the tip of the insertion body 23.
4 and. On the outer surface side of the bending piece 24, a plurality of locking teeth 25 are provided in a row from the substantially central portion in the height direction to the extending end. The locking teeth 25 have a sawtooth shape, and as shown in FIG. 8, the upper side is a locking surface 25A and the lower side is an oblique guide surface 25B.

The above-mentioned pair of locking pieces 22 are formed at symmetrical positions with the center thereof sandwiched in a posture in which the bending pieces 24 face outward. Each of the locking pieces 22 is formed such that the tip 22A thereof is sharpened at an acute angle. Explaining the detailed dimensions further, as shown in FIG. 4, when both locking pieces 22 are in a natural state, the distance between the lower end positions of both locking teeth 25 is
It is set to be substantially equal to the dimension of the long side of the locking hole 21. The depth dimension of both locking pieces 22 is shown in FIG.
As shown in FIG. 5, the dimension is set to be slightly smaller than the dimension of the short side of the locking hole 21, and the front surface of the locking piece 22 (see FIG. 5).
(From the right side of the vertical direction) to the inner edge of the flange 19 of the vertical closing plate 18 when the reinforcing metal fitting 14 is properly attached, the bent portion 1 on the vertical side from the front edge of the locking hole 21.
It is set so as to match the dimensions of the surfaces 1 and 12. A tapered guide surface 26 is formed at the lower end of the front surface of both locking pieces 22, as shown in FIG.

Next, the procedure for attaching the corner cover 17 will be described. As described above, the inner box 3 is housed in the outer box 2 and the reinforcing metal fitting 14 is provided between the bent portions 11 and 12 at the corner of the portion where the opening 7 is formed by the procedure described above.
Is attached. At this time, in order to prevent leakage from the locking hole 21 when filling the heat insulating material 4 which will be described later, a malt plane is wound around the reinforcing metal fitting 14 and attached. Instead of or in addition to the maltoprene, a tape for sealing may be applied. Further, the decorative frame 6 is fitted into the other portion of the opening 7.

Next, the corner cover 17 is attached. In that case, the flange 19 of the closure plate 18 on the vertical side
The pair of locking pieces 22 are inserted into the locking holes 21 of the reinforcing metal fitting 14 so that the brackets are aligned with the bent portions 11 and 12 on the vertical side. At this time, the guide surface 26 on the front surface of the locking piece 22 contacts the right edge of the locking hole 21 in FIG. When the pair of locking pieces 22 are inserted into the locking holes 21, as shown in FIG.
The two locking teeth 25 engage the diagonal guide surface 25B with the locking holes 2
The flexure pieces 24 are pushed in while being flexibly deformed in a direction of approaching the insertion body 23, by sequentially engaging with the corresponding rims of 1. When the corner cover 17 is pushed until it hits the laterally bent portions 11 and 12, the locking teeth 25 are locked.
More specifically, as shown in FIG. 8, the locking surface 25A of the locking tooth 25, which is in a substantially horizontal position due to the bending deformation of the bending piece 24, has a locking hole. The corner cover 17 is attached so as to prevent the corner cover 17 from slipping off by locking the corner cover 17 at the lower edge. At this time, as shown in FIG.
The front side surface of the corner cover 17 is flush with the front surface of the heat insulating box 1. For this reason, the packing provided on the back side peripheral edge of the heat insulating door arranged in the entrance / exit 9 can be pressed tightly over the entire circumference of the front surface peripheral edge of the entrance / exit 9 including the corner portion, and the leakage of cold air or the like is surely performed. Can be prevented. When the corner cover 17 is attached as described above, the heat insulating material 4 is foam-filled between the two boxes 2 and 3 through the filling port opened at an appropriate location of the outer box 2. After that, by closing the filling port, the heat insulating box 1 having the corner cover 17 mounted on the corner of the opening 7 is manufactured.

As described above, according to this embodiment, since a plurality of locking teeth 25 are provided on each of the locking pieces 22, respectively,
Even if there is an error in the mounting position of the reinforcing metal member 14 and the insertion depth of the locking piece 22 is different, any one of the locking teeth 25 can be locked in the locking hole 21. Thus, the corner cover 17 can be securely attached. Further, when the heat insulating material 4 is filled, the heat insulating material 4 also wraps around the bent inside of the bending piece 24, so that the heat insulating material 4 becomes a catch, and the corner cover 17 is more firmly prevented from coming off.

Although the heat insulating material 4 is filled after the corner cover 17 is attached in the above description, the corner cover 17 can be attached after filling the heat insulating material 4. In that case, the locking piece 22 is inserted into the locking hole 21 while being inserted into the heat insulating material 4 previously filled.
Since the front end 22A is formed to have an acute angle, the engaging piece 22 can be smoothly inserted while biting into the heat insulating material 4.

Further, for example, in the case where the corner portion of the entrance / exit 9 is constituted by a cross-shaped partition frame 8 such as the lower left corner of the entrance / exit 9 on the upper right of FIG.
Corner cover 1 without reinforcing metal fittings 14 attached
7 is attached. The partition frame 8 has a U-shaped metal front frame 3 having a U-shaped cross-section that is open to the rear side, as shown in FIG.
1 is formed by fitting a decorative frame 32 made of synthetic resin having a slightly larger U-shaped cross-section opened to the front side from the rear side and filling the heat insulating material 4 therein. Therefore, as shown in FIG. 10, in the corner portion of the entrance / exit 9, a cutout 33 is formed in the decorative frame 32 at the end on the horizontal plane side, and the above-mentioned reinforcing metal fitting 14 is formed in the front frame 31 therebelow. A locking hole 21 similar to the locking hole 21 opened in the. The corner cover 17 is likewise attached to the corner by inserting the locking piece 22 into the locking hole 21 along the vertically oriented surface of the partition frame 8 (FIG. 11).

<Modification> As a modification of the corner cover 17, as shown in FIG. 12, the solid portion 3 is provided between the left and right locking pieces 22.
The shape may be filled with 6 to be integrated. In this case, the tip of the solid portion 36 is also sharply formed. Further, as shown in FIG. 13, the number of the locking pieces 22 may be only one.
In this case, for example, the locking piece 22 is provided so as to be inserted between both long sides of the locking hole 21 which are opposed to each other, and the outer surface of the insertion body 23 is provided on the edge of one long side of the locking hole 21. The structure may be such that the abutment and the locking teeth 25 are locked to the lip on the opposite side.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. This second
In the embodiment, the shape of the locking piece 40 provided on the corner cover 17A is changed. In the first embodiment described above, the surface of the bending piece 24 on which the locking teeth 25 are provided is formed in a linear shape that gradually expands outward as it goes upward, whereas in the second embodiment In the locking piece 40, the surface of the bending piece 42 on which the locking teeth 43 are provided is formed in a curved shape so as to return to the insertion body 41 side at the upper end side. Further, on the inner surface of the extending end of the bending piece 42, a protrusion 45 capable of contacting the insertion body 41 is formed. Further, the left and right insertion bodies 41 are integrally connected by a connecting plate 46. The lower end 46 of this connecting plate 46
A is sharpened as shown in FIG. The other structures are the same as those in the first embodiment, and the parts having the same functions are designated by the same reference numerals, and the duplicated description will be omitted.

The operation of attaching the corner cover 17A of the second embodiment will be described. At the time of attachment, the pair of locking pieces 40 are inserted into the reinforcing metal fittings 14 or the locking holes 21 of the front frame 31 of the partition frame 8. At this time, since both the locking pieces 40 are connected by the connecting plate 46 and are prevented from opening, there is no possibility that the locking pieces 40 will open and will not enter the locking holes 21. Four
The work of inserting 0 into the locking hole 21 can be performed smoothly. Since the lower end 46A of the connecting plate 46 is sharpened, even when the corner cover 17A is attached after filling the heat insulating material 4, the connecting plate 46 can be smoothly inserted while biting into the heat insulating material 4.

Further, since the surface of the bending piece 42 on which the locking teeth 43 are provided is formed into a curved surface, the corner cover 17A is inserted into the locking holes 21 as shown in FIG. While 43 is sequentially engaged with the rim of the locking hole 21,
Since the bending amount of the bending piece 42 is kept substantially constant over the entire length, the corner cover 17A can be easily inserted. Further, when the corner cover 17A is completely inserted, as shown in FIG.
The protrusion 45 provided at the extended end of the plug comes very close to the insertion body 41. Therefore, after the attachment, the protrusion 45 hits the insertion body 41 to restrict the bending deformation of the bending piece 42, so that the locking force is increased and the corner cover 17 is also provided.
The lateral displacement of A in the locking hole 21 is also restricted.

<Modification> As a means for restricting the bending deformation of the bending piece 42, as shown in FIG. 17, the extending end of the bending piece 42 and the insertion body 41 may be connected by a rib 48. Good. Further, as shown in FIG. 19, the gap between the bending piece 42 and the insertion body 41 may be filled with a solid portion 49. <Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings, and various modifications can be made without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a perspective view of a heat insulating box according to a first embodiment.

FIG. 2 is an exploded perspective view of a corner of an opening.

FIG. 3 is a perspective view before the corner cover is attached.

FIG. 4 is a cross-sectional view showing the relationship between the locking pieces of the corner cover and the locking holes.

FIG. 5 is a vertical cross-sectional view of the corner of the opening.

FIG. 6 is a plan sectional view of a corner of the opening.

FIG. 7 is a sectional view showing a mounting operation of the corner cover.

FIG. 8 is a partial cross-sectional view showing a locking structure of locking teeth.

FIG. 9 is a sectional view of a partition frame.

FIG. 10 is a perspective view before the corner cover is attached to the corner of the partition frame.

FIG. 11 is a plan sectional view of a corner portion of the partition frame.

FIG. 12 is a partial front view of a modification of the corner cover.

FIG. 13 is a side view showing a mounting operation of a corner cover according to another modification.

FIG. 14 is a partial front view of the corner cover according to the second embodiment.

FIG. 15 is a sectional view thereof.

FIG. 16 is a sectional view showing a mounting operation of the corner cover.

FIG. 17 is a partial front view of a modification of the corner cover.

FIG. 18 is a partial front view of a modification of the corner cover.

[Explanation of symbols]

1 ... Insulation box 7 ... Opening 8 ... Partition frame 9 ... Doorway
14 ... Reinforcing metal fitting 17 ... Corner cover 18 ... Closing plate
21 ... Locking hole 22 ... Locking piece 22A ... (Locking piece 22
) Tip 23 ... Insert main body 24 ... Bending piece 25 ... Locking tooth 31 ... Front frame 17A ... Corner cover 40 ... Locking piece
41 ... Insert main body 42 ... Bending piece 43 ... Locking tooth 45 ...
Protrusion 46 ... Connecting plate

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-152255 (JP, A) JP-A-58-72788 (JP, A) Actual development S56-2479 (JP, U) Actual publication S35- 32242 (JP, Y1) S. 53-10560 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25D 23/06

Claims (6)

(57) [Claims] 1. A structure for attaching a corner cover having an L-shaped cross section in which two closing plates are arranged orthogonally to each other at a corner of a rectangular opening formed in a heat insulating box, wherein one of the corner covers is provided. with locking piece is projected on the reverse side of the closing plate, the projecting been closed plate against which the side surface of the locking piece of the sides constituting the corner portion, of the locking piece A locking hole that allows insertion is opened,
Also, the locking piece is an insertion body protruding from the closing plate.
And formed so that it will be folded back from the tip of this insertion body.
And a flexibly deformable flexure piece.
Contact is column set a plurality of locking teeth along the insertion direction
The corner cover mounting structure is characterized in that one of the locking teeth is elastically locked to the rim of the locking hole. 2. The corner cover mounting structure according to claim 1, wherein a tip of the locking piece is formed to be sharp. 3. A flexure deformation amount of the bending piece is substantially constant when each locking tooth is engaged with a rim of the locking hole. It is formed in a curved surface shape, Claim 1 or Claim 2 characterized by the above-mentioned.
The corner cover mounting structure shown. 4. The bending piece is provided with a bending restriction portion that comes into contact with the insertion body and restricts a bending amount of the bending piece in a direction of approaching the insertion body. Contract
The corner cover mounting structure according to any one of claims 1 to 3 . 5. A pair of the locking pieces have locking teeth.
It is provided with a back-to-back posture with a gap
Any one of claims 1 to 4 characterized in that
Corner cover mounting structure described there . 6. The corner cover mounting structure according to claim 5, wherein the inserting bodies of the both locking pieces are connected to each other by a connecting portion.