JP2005069559A - Connection structure of heat insulating box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent dislocating of an inner box or outer box, regarding a heat insulating box, especially a structure of a part where the opening edges of the outer box and inner box are connected to each other by a connection frame. <P>SOLUTION: A regulation projection 50 is formed at a farther position than a second lock claw 45B on the surface opposing to the frame body 41 of a second lock piece 43B of the connection frame 40. The regulation projection 50 is formed to have a low ridge-shaped cross-section with an easy gradient inclined surfaces 51 on both sides. When the connection frame 40 can be engaged between both flanges 21, 31, the open end of a folded part 32 can move on the rear surface of the second lock piece 43B while running over the regulation projection 50 with elastic deformation of the second lock piece 43B. Thereby, the regulation projection does not disturb assembling of the connection frame 40. Since the elastic deformation of the second lock piece 43B to the rear side is prevented after assembling of the connection frame 40 and filling with heat insulating material 12, the open end of the folded part 32 on the inner box 30 side is regulated by abutting against the regulation projection 50, that is, it is prevented that the inner box 30 dislocates to the outside. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat insulating box, and more particularly to a structure of a portion where opening edges of an outer box and an inner box are connected by a connection frame.

The applicant of the present application has proposed the one disclosed in Patent Document 1 as a device that can reliably connect the opening edges of the outer box and the inner box with a simple configuration.
This will be described with reference to FIG. In the heat insulating box 1, the inner box 3 is accommodated in the outer box 2 with a space therebetween, while the flanges 2 </ b> A and 3 </ b> A provided opposite to the opening edges of both boxes 2 and 3 are closed by the connection frame 4. The heat insulating material 5 made of foamed resin is filled between the boxes 2 and 3.
More specifically, the portion connecting the opening edges of the boxes 2 and 3 with the connection frame 4 is opposed to the flanges 2A and 3A of the outer box 2 and the inner box 3, as shown in FIG. The bent edges 2B and 3B, which are bent at right angles toward the filling space 6 side of the heat insulating material 5, are formed at the edges. On the other hand, the connection frame 4 includes a frame main body 4A that abuts on the outer surface extending over both flanges 2A and 3A, and a locking claw 7 is provided at the leading end of the support portion 4B protruding from the rear surface of the frame main body 4A. The provided pair of engaging pieces 8 and 9 have shapes that extend in opposite directions to be elastically deformable.

In attaching the connection frame 4, the connection frame 4 is inclined, and the engagement piece 9 on the inner box 3 side is inserted into the filling space 6 between the bent portions 2B and 3B, and the locking claw 7 is inserted. The hook 2 is hooked on the open end of the bent portion 3B, the connection frame 4 is further pushed in, the engaging piece 8 on the outer box 2 side is passed between the two bent portions 2B, 3B, and the frame main body 4A is laid down so that both flanges 2A, 3A, the connection frame 4 (frame body 4A) is moved to the outside (left side in the figure) while sliding on the surfaces of both flanges 2A and 3A, and the engagement pieces 8 and 9 are engaged. The pawl 7 is elastically locked to the open ends of the corresponding bent portions 2B and 3B.
Thereby, the connection frame 4 is attached in a state in which the space between the flanges 2A and 3A of both boxes 2 and 3 is closed, and when the heat insulating material 5 is filled, the leakage is prevented and the heat insulating material 5 is solidified. After being fixed together, the opening end face of the heat insulation box 1 is configured.
Japanese Patent Laid-Open No. 2000-213858

By the way, the connection frame 4 is fixed as the heat insulating material 5 is solidified after being fitted between the flanges 2A and 3A of the two boxes 2 and 3, as described above. When subjected to an impact or the like, as shown in FIG. 6B, the open end of the bent portion 3 </ b> B slides on the back surface of the engagement piece 9, and the inner box 3 may be shifted to the outside. If it does so, it will be in the state which the edge of the connection frame 4 protruded inside the store | warehouse | chamber, for example, there existed a problem that cleaning could not fully be performed in the corner part of the inner box 3 which became hidden by this protruded part.
However, as with the outer box 2 side on the back surface of the frame body 4A, if the rib 4C that hits the root portion of the bent portion 3B on the inner box 3 side is raised, the displacement of the inner box 3 can be prevented. If the ribs 4C are erected on both sides, it will interfere with the assembly of the connection frame 4, and if there is a dimensional error in molding, both the locking claws 7 will be properly attached to the open ends of the corresponding bent portions 2B and 3B. It cannot be easily adopted because it causes a problem that it cannot be locked.
The present invention has been completed based on the above circumstances, and an object thereof is to prevent the displacement of the inner box and the outer box.

As a means for achieving the above object, the connection structure of the heat insulation box according to the invention of claim 1 is characterized in that the inner box is accommodated in the outer box while opening the space for filling the heat insulating material. The flanges are provided with flanges that are arranged to face each other at an interval, and the flanges are connected to each other by a connection frame. A bent portion that is bent substantially at right angles toward the filling space is provided, and the connection frame includes a frame body that abuts over the outer surfaces of the flanges, and a support portion that protrudes from the back surface of the frame body. A pair of elastically deformable engaging pieces extending in opposite directions and extending substantially in parallel with the frame body are provided at the protruding ends of the frame, and the bent portions are opened at the tips of the engaging pieces. It has a structure with a locking claw that can be locked at each end. At least one of the engagement pieces can be brought into contact with the open end of the corresponding bent portion on the surface on the side facing the frame main body at a position inward of the locking claw. The restricting protrusion is provided with elastic deformation of the engagement piece in a state before the filling space is filled with the heat insulating material, and the open end of the bent portion is the support portion. After the filling space is filled with a heat insulating material, elastic deformation of the engagement piece is prevented, so that the open end of the bent portion is prevented. It is characterized in that it is configured to restrict movement toward the back toward the support portion.
The invention of claim 2 is characterized in that, in the invention of claim 1, the restricting projection is formed in a mountain shape having slant surfaces with gentle slopes on both sides.

<Invention of Claim 1>
The connection frame is attached by placing the frame body over the surface of the flanges of both boxes and locking the locking claws at the tips of both engagement pieces to the open ends of the corresponding bent parts. Insulation is filled and fixed.
Here, when the connection frame is fitted between both flanges, when the open end of the bent portion is slid on the back surface of the engaging piece, the open end of the bent portion is restricted due to elastic deformation of the engaging piece. It is possible to move on the back surface of the engagement piece while getting over the protrusion. Therefore, the restriction protrusion does not hinder the assembly.
On the other hand, after the heat insulating material is filled, the engagement piece is prevented from being elastically deformed to the back side. Therefore, if the flange of the inner box or the flange of the outer box tries to move in a direction approaching the flange on the opposite side under impact force, etc., the open end of the bent portion is prevented from elastic deformation. The movement of the engaging piece is restricted by hitting the restricting protrusion of the engaging piece, that is, displacement of the inner box or the outer box is prevented.
That is, it is possible to reliably prevent the inner box and / or the outer box from being displaced while securing the connection frame assembly workability.

<Invention of Claim 2>
When fitting the connection frame between both flanges, the engagement piece is elastically deformed, and the open end of the bent portion gets over the restricting projection along the slope of the gentle slope, and the engagement piece is relatively easy. It is possible to move on the back surface of the machine and to perform the assembly work efficiently. On the other hand, after the connection frame is fixed, that is, after the heat insulating material is solidified on the back surface of the engagement piece, the movement is restricted by the contact of the open end of the bent part with the restricting protrusion having a mountain shape, that is, the inner box or the outer box. Is prevented from being displaced.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, reference numeral 10 denotes a heat insulating box constituting the refrigerator main body, and an inner box 30 is accommodated in an outer box 20 made of a metal plate such as a stainless steel plate with a space therebetween. Is formed by foaming and filling a heat insulating material 12 made of a foamed resin such as urethane foam, and an opening 13 serving as an entrance is formed on the front surface thereof. It is designed to be opened and closed.
As shown in FIG. 2, flanges 21 and 31 are formed at right angles at the opening edges of the outer box 20 and the inner box 30 at the portions constituting the opening 13, and are opposed to each other with a predetermined interval. The connecting frame 40 (also referred to as a joiner) made of synthetic resin is fitted between the flanges 21 and 31 so as to be connected.

Further, the structure of the connecting portion will be described. Bending portions 22 and 32 that are bent at the same right angle toward the filling space 11 side of the heat insulating material 12 are formed at opposite edges of the flange 21 of the outer box 20 and the flange 31 of the inner box 30. Has been.
On the other hand, the connection frame 40 is made of a synthetic resin as described above, and includes a slightly thick frame main body 41 that can be brought into contact with the outer surfaces of both flanges 21 and 31 of both boxes 20 and 30. As shown in FIG. 4, the frame body 41 has a slightly shorter width than the dimension from the base end (outer end) of the flange 21 of the outer box 20 to the base end (inner end) of the flange 31 of the inner box 30. In a region having a size and abutting against both flanges 21 and 31 on the back surface side, each is thinned at the center portion in the width direction, in other words, only both end portions in the width direction are further thickened, and are closely attached. It is intended to improve the sex.

A support portion 42 is erected in a right-angled posture at a substantially central position of the full width on the back surface of the frame body 41 and is formed over the entire length. The projecting dimension of the support part 42 is such that when the frame body 41 is brought into contact with the outer surfaces of both flanges 21, 31, the projecting end of the support part 42 is the open end of the bent parts 22, 32 of both flanges 21, 31. It is set to almost reach the position.
A pair of first engagement pieces 43 </ b> A and second engagement pieces 43 </ b> B are formed at the protruding end of the support portion 42 in a form extending in parallel with the frame body 41 on both the outer and inner sides. Yes. The support portion 42 can be elastically tilted with its root portion as a fulcrum, and both the engagement pieces 43A and 43B are elastic with a base end portion connected to the tip of the support portion 42 as a fulcrum. It can be bent and deformed.

At the tip of the first engagement piece 43A, there is formed a first guide portion 44A that is inclined outwardly (to the left in FIG. 2) and thus gradually away from the frame body 41, and the first guide portion 44A. A first locking claw 45A that locks to the back side of the open end of the bent portion 22 on the outer box 20 side is formed by projecting the upper end of the first engagement piece 43A upward.
On the other hand, a second guide portion 44B that is inclined so as to be gradually separated from the frame main body 41 toward the inner side of the second engagement piece 43B is formed at the tip of the second engagement piece 43B. A second locking claw 45B that locks to the back side of the open end of the bent portion 32 on the inner box 30 side is formed by the upper end protruding above the second engagement piece 43B.
The distance between the first locking claw 45A and the second locking claw 45B is set to be substantially equal to the distance between the open ends of the bent portions 22 and 32.
In addition, on the back surface of the frame main body 41, there is a rib 47 that functions to engage with the surface of the base portion of the bent portion 22 on the outer box 20 side and sandwich the bent portion 22 together with the first locking claw 45A. Is formed.

  Now, in the second engagement piece 43B, the open end of the bent portion 32 on the inner box 30 side is on the surface facing the frame body 41 and at a position slightly behind the second locking claw 45B. A restricting protrusion 50 that abuts is formed. The restricting protrusion 50 is formed in a cross-sectional mountain shape in which both sides are inclined surfaces 51 having a gentle slope, and has a height lower than that of the second locking claw 45B. Therefore, when the connection frame 40 is assembled as will be described later, when the connection frame 40 is pushed or pulled while the open end of the bent portion 32 is slidably contacted on the second engagement piece 43B, a predetermined operation or more is performed. If force is applied, the open end of the bent portion 32 is accompanied by elastic deformation of the second engaging piece 43B (a range in which the second locking claw 45B cannot be removed from the bent portion 32 of the inner box 30), and the inclined surface 51 It is possible to get over the restricting protrusion 50 from the front end side to the back side and in the opposite direction.

Then, the effect | action of this embodiment is demonstrated. In manufacturing the heat insulating box 10, first, the inner box 30 is accommodated in the outer box 20 with the filling space 11 opened, and the flanges 21, 31 of both boxes 20, 30 are bent as shown in FIG. The parts 22 and 32 are arranged in a state of facing each other with a predetermined interval.
Then, as shown in FIG. 3 (A), the connecting frame 40 is placed in an oblique posture with the inner edge of the warehouse lowered, and the second engagement piece 43B is inserted between the bent portions 22, 32, When the second guide portion 44B hits the open end of the bent portion 32 on the inner box 30 side and then pushes in further, the second locking claw 45B passes over the open end of the bent portion 32 and is hooked on the back side thereof. Become.
Further, the connection frame 40 is pushed in, and the first engagement piece 43A is passed between the bent portions 22, 32 as shown in FIG. Hit across the surface. During this time, the open end of the bent portion 32 rides on the inclined surface 51 of the restricting protrusion 50 and passes through the restricting protrusion 50 in a direction approaching the support portion 42 while bending and deforming the second engagement piece 43B.

Finally, the connection frame 40 is slid toward the outside indicated by the arrow in FIG. 3B while the frame body 41 is pressed against the outer surfaces of the flanges 21 and 31. As shown in FIG. 6C, the pushing is stopped when the rib 47 hits the base of the surface of the bent portion 22 on the outer box 20 side, and the first engaging piece 43A is bent and deformed in the meantime. The first locking claw 45A gets over the open end of the bent portion 22 on the outer box 20 side and locks to the back side thereof.
On the other hand, the open end of the bent portion 32 on the inner box 30 side is in sliding contact with the back surface of the second engagement piece 43B toward the tip, but rides on the inclined surface 51 of the restricting protrusion 50 on the way, The engaging piece 43B passes through the restricting protrusion 50 while being bent and deformed. At the same time that the first locking claw 45A is locked to the back side of the open end of the bent portion 22 on the outer box 20, the second lock claw 45B is the open end of the bent portion 32 on the inner box 30 side. Lock to the back of the.

As a result, the assembly of the connection frame 40 is completed, the frame main body 41 is brought into close contact with the outer surfaces of the flanges 21 and 31, and the engaging claws 45A and 45B of the engagement pieces 43A and 43B are respectively corresponding bent portions 22. , 32 is elastically locked to the open ends, and the connection frame 40 is firmly attached in a state where the space between the flanges 21 and 31 of the outer box 20 and the inner box 30 is closed.
From this state, the heat insulating material 12 made of a foamed resin such as urethane foam is foam-filled between the outer box 20 and the inner box 30 and solidified, whereby the heat insulating box 10 as shown in FIG. 1 is completed. The
As shown in detail in FIG. 4, in the assembly portion of the connection frame 40, when the heat insulating material 12 is foam-filled, the foaming pressure of the heat insulating material 12 causes the guide portions 44 </ b> A and 44 </ b> B of the engaging pieces 43 </ b> A and 43 </ b> B to be assembled. Acts in a direction to approach the frame main body 41. As a result, both the locking claws 45A and 45B are firmly locked to the open ends of the corresponding bent portions 22 and 32, so Connection with the boxes 20 and 30 is ensured.

Further, after the heat insulating box 10 is formed as described above, the inner box 30 may be moved outward as shown by the arrow in FIG. . However, the second engaging piece 43B of the connection frame 40 is provided with a regulating protrusion 50, and the heat insulating material 12 is filled and solidified on the back side of the second engaging piece 43B to prevent elastic deformation to the back side. Since the open end of the bent portion 32 on the inner box 30 side hits the restricting protrusion 50, the movement is restricted, that is, the inner box 30 is prevented from shifting outward.
Note that when the outer box 20 is about to be displaced inward, the bent portion 22 abuts against the rib 47 of the connection frame 40, thereby restricting it.

As described above, according to the present embodiment, the restricting protrusion 50 provided on the second engagement piece 43B is formed in a mountain-shaped cross section in which both sides are inclined surfaces 51 having a gentle slope. When the open end of the bent portion 32 is slid on the back surface of the second engaging piece 43B when fitting 40 between the flanges 21, 31, the bent portion is accompanied by elastic deformation of the second engaging piece 43B. The open end of 32 can move over the rear surface of the second engagement piece 43B while getting over the restricting protrusion 50. Therefore, the restriction protrusion 50 does not hinder the assembly of the connection frame 40 at all.
On the other hand, after the connection frame 40 is assembled and the heat insulating material 12 is filled, since the elastic deformation to the back side of the second engagement piece 43B is prevented, the bent portion 32 on the inner box 30 side is in a state of being blocked. The movement of the open end is restricted by hitting the restricting protrusion 50, that is, the inner box 30 is prevented from shifting outward.

In other words, it is possible to reliably prevent the displacement of the inner box 30 while ensuring the assembly workability of the connection frame 40.
In addition, the elastic force of the 2nd engagement piece 43B can be heightened by forming the control protrusion 50 in the 2nd engagement piece 43B in the bending shape, Therefore Therefore, The latching with respect to the bending part 32 by the side of the inner box 30 is possible. It can contribute to increasing power.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) When assembling the connection frame, if it is inserted in a slanted posture with the edge on the outside of the cabinet lowered, contrary to the above embodiment, the back of the frame body of the connection frame is displaced to the outside of the inner box. Since the rib is raised to restrict, it is preferable to provide the restricting protrusion on the first engagement piece to restrict the displacement to the inside of the outer box.
(2) Moreover, you may make it provide a control protrusion in both a 1st engagement piece and a 2nd engagement piece, without providing a rib.

Plan sectional drawing of the heat insulation box which concerns on one Embodiment of this invention Exploded sectional view of the opening Sectional view showing connecting frame assembly operation Cross section near the opening Plan sectional view of a conventional heat insulation box Cross section near the opening

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Heat insulation box 11 ... Filling space 12 ... Heat insulating material 13 ... Opening part 20 ... Outer box 21 ... Flange 22 ... Bending part 30 ... Outer box 31 ... Flange 32 ... Bending part 40 ... Connection frame 41 ... Frame main body 42 ... support part 43A, 43B ... engagement piece 45A, 45B ... locking claw 50 ... regulating protrusion 51 ... inclined surface

Claims (2)

Inside the outer box, the inner box is accommodated by opening a space for filling the heat insulating material, and the flanges are provided on the opening edges of the two boxes so as to face each other with a space between them. In what is connected with a frame,
The opposing edges of the flanges are provided with bent portions that are bent substantially at right angles toward the filling space, respectively.
The connection frame includes a frame main body that abuts over the outer surfaces of the two flanges, and the projecting ends of the support portions projecting from the back surface of the frame main body are arranged in parallel to the frame main body and opposite to each other. A pair of elastically deformable engaging pieces are provided, and a locking claw that can be locked to the open end of each bent portion is provided at the tip of each engaging piece,
At least one of the engagement pieces can be brought into contact with the open end of the corresponding bent portion on the surface on the side facing the frame main body at a position inward of the locking claw. The restricting protrusion is provided with elastic deformation of the engagement piece in a state before the filling space is filled with the heat insulating material, and the open end of the bent portion is the support portion. After the filling space is filled with a heat insulating material, elastic deformation of the engagement piece is prevented, so that the open end of the bent portion is prevented. The connection structure of the heat insulation box characterized by restrict | limiting moving to the back which goes to the said support part side. The connection structure for a heat insulating box according to claim 1, wherein the restricting protrusion is formed in a mountain shape having slanted surfaces on both sides.

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