JP5743699B2 - Sealing structure under cooling storage door - Google Patents

Description

  The present invention relates to a seal structure under a door in a cooling storage such as a prefabricated refrigerator.

A prefabricated refrigerator generally has a structure in which a storage body having a heat insulation panel assembled on a floor surface is installed and an entrance is formed on the front surface thereof, while a heat insulation door is swingably opened and closed at the entrance. Especially, what is referred to as a walk-in type is such that the stored items are placed on a carriage or the like and can be taken in and out of the storage body from the entrance. For this reason, the lower edge of the entrance / exit is configured to be open to the floor, but when sealing the entrance / exit from the outside air, a structure in which packing is attached over the entire periphery of the peripheral edge of the back surface of the heat insulating door should be adopted. I can't. Therefore, in this type of walk-in type prefabricated refrigerator, a face seal type packing that contacts the lip of the entrance / exit is disposed from the upper edge of the heat insulation door to the left and right side edges, while the lower face of the heat insulation door is provided on the lower surface of the heat insulation door. In addition, a structure is provided in which a hanging type packing that is in close contact with the floor surface is provided.
Conventionally, as described below in Patent Document 1, such a door-under-seal structure includes an L-shaped packing attachment body that is applied to the lower surface from the lower edge of the back surface of the heat insulating door. The unit is configured by hanging down the packing from the lower surface of the horizontal part of the unit, and attaching the unit to the lower part of the heat insulating door by screwing the horizontal part and the vertical part of the packing mounting body to each of a plurality of locations. Things are known.

JP 2011-1793 A

However, the above-described conventional structure has a structure in which both the horizontal portion and the vertical portion are screwed when attaching the packing attachment body, and there are many places to be screwed at the end, which takes time and effort. In addition, due to the structure of the heat insulating door, the object to be screwed is likely to be a synthetic resin decorative plate that connects the exterior plate and the interior plate, that is, the screw is screwed into the synthetic resin material. There was a problem that cracks and the like were generated due to deterioration, leading to screw disengagement.
The present invention has been completed based on the above circumstances, and its object is to simplify the work of attaching the packing attachment body to the heat insulating door and to improve the attachment strength.

The sealing structure under the door of the cooling storage of the present invention includes a storage body composed of a heat insulating box installed on the floor, and an opening formed on one side of the storage body and having a lower edge opened to the floor. And a heat insulating door attached to the opening so as to be openable and closable, and an upper edge and a left and right side edge of the back surface of the heat insulating door are provided with a face seal packing that is in close contact with a corresponding mouth edge of the opening. On the other hand, on the lower surface of the heat-insulating door, a hanging storage is provided along the horizontal direction at the lower edge of the back surface of the heat-insulating door in a cooling storage room in which a hanging packing that contacts the floor surface is suspended on the lower surface of the heat-insulating door. An L-shaped packing attachment body is provided which is formed and includes a vertical portion facing the retaining groove on the back surface of the heat insulation door and a horizontal portion facing the lower surface of the heat insulation door. On the lower surface of the horizontal portion A mounting portion for the packing is provided, and an inner surface of the vertical portion is provided with a hooking claw that is hooked in the hooking groove, and the packing mounting body has the hooking claw of the vertical portion attached to the hooking claw. While it latches in a latching groove, it has the characteristics in the place attached to the lower part of the said heat insulation door by screwing the edge part of the outer side in the said horizontal part.
Here, when the storage body is composed of a heat insulating box body that is not open on the lower surface but also has a heat insulating bottom surface, and this bottom wall is placed on the floor surface, The wall corresponds to the “floor surface” in the above configuration.

The packing attachment body is used by hooking the hooking claw provided in the vertical part in the hooking groove formed on the back surface of the lower edge part of the heat insulating door and screwing the end of the horizontal part outside the warehouse. Attached to the bottom of the insulated door. Compared with the case where both the vertical portion and the horizontal portion are screwed together, the screwing location can be halved, so that the mounting work of the packing mounting body is simplified.
When screwing the outer edge of the horizontal part, the object to be screwed in is the corner on the surface side of the lower edge of the heat insulating door, and this part may be the metal exterior plate that constitutes the heat insulating door Because it is high, unlike synthetic resin, it is difficult to receive damage such as cracking, that is, it is difficult to remove the screw, and the mounting means of the vertical part does not have the possibility of damaging the other party. Strength can be increased.

The following configuration may also be used.
(1) A packing groove in which the face seal packing can be fitted together with the other three peripheral edges is formed on the lower edge of the heat insulating door, and the packing groove formed on the lower edge of the insulating groove is the hook groove. It has become.
The heat insulating door has a structure in which a packing groove into which a face seal packing is mounted is formed on the back surface side of the four peripheral edges, and the lower packing groove of the door is used as a hooking groove of the packing mounting body. That is, the under-door seal structure of the present invention can be dealt with by directly using a heat-insulating door applied to a so-called step-in type cooling storage having four closed edges.

(2) The hanging packing includes an inner skirt packing that is suspended from an inner end of the horizontal portion of the packing attachment body, and an outer skirt packing that is suspended from an outer end of the horizontal portion. Both ends in the width direction of the outer skirt packing are extended, and each extending portion is turned to the inner side, and then overlapped with both ends in the width direction of the inner skirt packing. By doing so, it is formed in a horizontally long cylindrical shape.
Since the hanging packing is formed in a cylindrical shape and a heat insulating space sealed inside is formed, it is effective for sealing under the door.

(3) In the case where the heat insulating door can swing open and close around one vertical edge, the attachment portion of the outside skirt packing and the inside skirt on the lower surface of the horizontal portion of the packing attachment body A heater is disposed along the length direction at a position between the mounting portions of the packing, and a heat sink is disposed in contact with the lower surface of the heater, and a swinging end of the heat insulating door on the heat sink A rising portion is formed at the end on the side, and the rising portion is stretched along the lower portion of the side surface on the swing end side of the heat insulating door.
Depending on the installed state of the heat insulating door, the closing posture may vary, especially on the rocking end side of the heat insulating door, the crushing margin of the face seal packing on the rocking end side varies, and if the seal becomes sweet, the rocking motion in the heat insulating door Condensation may occur due to cooling of the side surface on the end side. On the other hand, in this configuration, a rising portion is provided at one end of the heat radiating plate arranged in close contact with the lower surface of the heater, and this rising portion is stretched under the side surface of the heat insulating door on the swing end side. Therefore, a temperature rise near the lower portion of the side surface on the swing end side is expected due to heat from the rising portion, and dew condensation is prevented at the same location.

(4) The packing mounting body has a structure in which a mounting portion facing the lower edge of the surface of the heat insulating door is formed from the outer end of the horizontal portion, and the mounting portion is screwed to the heat insulating door. In addition, by rotating the latching claw around the latching claw from the state of being latched in the latching groove, it is adapted to be fitted to the lower end of the heat insulating door, A recess is formed on the upper surface of the horizontal portion of the packing mounting body so as to avoid the interference with the heat insulating door during the mounting operation of the packing mounting body.
The packing mounting body is fitted to the lower edge of the heat insulating door, and the hooking claw is hooked in the hooking groove. Fitted. Meanwhile, the back side corners of the lower edge of the heat insulation door try to interfere with the upper surface of the horizontal part, but the interference part fits in the recess provided on the upper surface of the horizontal part and escapes, so the mounting operation is smooth Done. After the packing mounting body is mounted, a heat insulating space is formed between the lower surface of the heat insulating door by the recess. For this reason, when a heater for preventing condensation is disposed on the lower surface of the horizontal portion, the heat generated from the heater is prevented from leaking to the heat insulating door side.

  According to the present invention, the work of attaching the packing attachment body to the heat insulating door can be simplified, and the attachment strength can be improved.

1 is an external perspective view of a prefabricated refrigerator according to an embodiment of the present invention. The perspective view which looked at the doorway in the closed state from the outside Perspective view seen from the back of the insulated door Sectional drawing which shows the packing mounting structure in the side edge part of a heat insulation door Sectional view showing mounting operation of packing mounting body Sectional view showing the seal structure under the door Same perspective sectional view Bottom view showing the forming operation of the hanging packing Bottom view showing the end structure of the hanging packing Perspective view The perspective view which shows the structure of the rocking end lower part of a heat insulation door Perspective view seen from outside of door seal structure

<Embodiment>
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, a walk-in prefabricated refrigerator is illustrated.
As shown in FIG. 1, the prefabricated refrigerator 10 includes a storage body 11 having a box shape with an open bottom formed by assembling a plurality of heat insulating panels, and is installed on a floor surface F (see FIG. 6). The front wall 12 of the storage body 11 is formed with a doorway 13 having a lower edge opened to the floor surface F, and a heat insulating door 20 is attached to the doorway 13 so as to be swingable and openable around the right edge, The lock member 15 is locked in a closed state. The stored items are placed on, for example, a carriage D, and the carriage D is put into and out of the storage body 11 from the entrance 13.

Next, the seal structure of the entrance / exit 13 will be described.
In detail, as shown in FIG. 2, the doorway 13 is formed by fitting a gate-shaped frame 14 to the opening of the lower surface formed in the front wall 12 of the storage body 11. On the upper surface and the left and right side surfaces of 13, overhanging portions (not shown) projecting inward in the region on the back side are formed. This overhang corresponds to the mouth edge of the entrance / exit 13 in the present invention.
As shown in FIG. 4, the heat insulating door 20 includes a metal plate-made exterior plate 21 and an interior plate 25 that are spaced apart, and a synthetic resin-made decorative plate between the outer peripheral edges of both the plates 21, 25. The outer shell 35 is formed by being connected at 30.

More specifically, the exterior plate 21 is formed with a side plate 23 that is bent at right angles to the back side at the four side edges of the oblong oblong surface plate 22, and is further bent at a right end inward at the protruding end of each side plate 23. It is the shape in which the insert plate 24 was formed. The inner plate 25 is formed with insertion plates 27 that are bent at right angles to the front side at the four side edges of a back plate 26 that is a rectangle slightly smaller than the front plate 22 of the outer plate 21.
The decorative plate 30 is formed by cutting a synthetic resin material extruded into a predetermined length, has an L-shaped cross section as a whole, and has insertion grooves 31 and 32 formed at both ends, A packing groove 33 for mounting the face seal packing 40 is formed on one surface. Inwardly engaging portions 34 are formed at both opening edges of the packing groove 33.

  As described above, the interior plate 25 is arranged on the back side of the exterior plate 21 with a space therebetween, and as shown in FIG. 4, the insert plate 24 of the exterior plate 21 and the insert plate 27 of the interior plate 25. Are inserted into the corresponding insertion grooves 31 and 32 of the decorative plate 30, respectively, to form the outer shell 35, and the outer shell 35 is filled with a heat insulating material 36 made of foamed resin to insulate heat. A door 20 is formed. The rear surface side of the heat insulating door 20 formed in this way is formed with a thick central portion (thick wall portion 37) excluding the upper, lower, left and right four peripheral edges, and the packing groove 33 on the rear surface side of the four peripheral edge portions 38. Is formed.

  The face seal packing 40 is formed by extruding an elastic material such as rubber and cutting it into a predetermined length, and forms a hollow arrowhead from the back surface of the packing body 41 in which three air chambers 42 are arranged. The mounting portion 43 has a protruding shape. The face seal packing 40 is attached by inserting the mounting portion 43 into the packing groove 33 and hooking it, and the packing body 41 is arranged along the back surface of the peripheral edge portion 38 of the heat insulating door 20.

  Since the heat insulating door 20 has a structure in which the face seal packing 40 can be attached to the back surface side of the four peripheral edge portions 38, for example, the front wall of the storage body has a lower edge that is not opened, that is, an entrance that is closed on all four peripheral edges. In a so-called step-in type prefabricated refrigerator that is opened, the present invention can also be applied to a heat insulating door 20 that opens and closes the entrance. In other words, in this embodiment, it can be said that the heat insulating door 20 attached to the step-in type doorway is used as it is.

In this embodiment, the face seal packing 40 is fitted from the upper edge portion 38 of the heat insulating door 20 to the left and right side edge portions 38. Specifically, both end portions of the face seal packing 40 disposed on the upper edge portion 38 and the upper end portions of the face seal packing 40 disposed on the left and right side edge portions 38 are cut at 45 ° to form a cut surface. When combined, a right-angled corner is formed, and the lower end of the face seal packing 40 disposed on the left and right side edges is extended to the extent that it approaches the floor surface F. However, with respect to the portion protruding from the lower ends of the left and right packing grooves 33, the mounting portion 43 is cut away, and only the packing body 41 extends.
When the heat insulating door 20 is closed, the face seal packing 40 mounted in a gate shape from the upper edge portion 38 to the left and right side edge portions 38 is in contact with and closely contacts the entrance and exit ports 13 and the left and right mouth edges. In addition, the lower end portions of the left and right face seal packings 40 are suspended to the vicinity of the floor surface F.

On the other hand, a packing unit 50 to which a hanging packing 80 is attached is attached to the lower edge side of the heat insulating door 20.
The packing unit 50 has a packing mounting body 51 as a unit main body. The packing mounting body 51 is formed by extrusion molding of a synthetic resin material, and as a whole, as shown in FIG. 6, faces the back surface of the lower peripheral edge portion 38A (hereinafter referred to as the lower edge portion 38A) of the heat insulating door 20. Are formed in an L-shape including a vertical portion 52 and a horizontal portion 55 facing the lower surface of the lower edge portion 38A. As shown in FIG. 8, the horizontal portion 55 of the packing attachment body 51 has a total length comparable to the entire width of the heat insulating door 20, while the vertical portion 52 is cut at both ends in the length direction, The overall length is comparable to the length of the lower packing groove 33A formed on the back surface of the lower edge portion 38A.

The vertical portion 52 is formed in a hollow thick plate shape as a whole, and a plurality of partition walls 53 are formed therein and are reinforced.
Three horizontal skirt packings 70 constituting the hanging packing 80 are attached to the horizontal portion 55 in a hanging form. The skirt packing 70 is made of synthetic rubber or the like, and has a shape in which a seal band 72 is suspended from the lower end of a T-shaped attached portion 71, and is formed in a shape that is elongated in the horizontal direction as a whole. .
Such a skirt packing 70 corresponds to the inner end (the position corresponding to the outer surface side of the vertical portion 52), the outer outer end, and the inner surface side of the vertical portion 52 of the horizontal portion 55 of the packing attachment body 51. It is designed to be suspended from three positions. Hereinafter, the skirt packings 70 may be referred to as an internal packing 70A, an external packing 70B, and an intermediate packing 70C, respectively.

At the above-described three mounting positions on the lower surface of the horizontal portion 55, packing mounting portions 57 are formed to bulge downward, and the mounting portions 71 of the skirt packing 70 are slid onto the packing mounting portions 57. An attachment groove 58 having a T-shape that can be fitted is formed over the entire length.
Here, as shown in FIG. 8, the outside packing 70B has a width dimension larger than the entire length of the horizontal portion 55 of the packing mounting body 51, in other words, an extension 73 having a predetermined length at both ends in the width direction. Is formed. On the contrary, the internal packing 70 </ b> A is fixed to a width dimension that is smaller than the entire length of the vertical portion 52. The intermediate packing 70 </ b> C has a width dimension comparable to the entire length of the vertical portion 52.

A pair of heater mounting portions 60 are formed to project between the packing mounting portions 57 of the outer packing 70B and the intermediate packing 70C on the lower surface of the horizontal portion 55. Each heater mounting portion 60 is formed with a press-fitting groove 61 that can be fitted by press-fitting the code heater 75 from the lower surface side.
Further, on the lower surface side of the cord heater 75 described above, a heat radiating plate 77 made of a metal plate having excellent thermal conductivity is arranged in contact with the cord heater 75. For this reason, in both the packing mounting portions 60 described above, insertion grooves 63 are formed so as to be opposed to each other while allowing both side edges of the heat radiating plate 77 to be fitted and slid.

  The heat radiating plate 77 is formed to have a predetermined length longer than the entire length of the packing mounting body 51, and a portion extending on one end side of the heat radiating plate 77 is bent at a right angle upward to form a rising portion 78. As shown in FIG. 11, the rising portion 78 is brought into contact with the lower end portion of the side surface 20 </ b> A (the side plate 23 of the exterior plate 21) on the swing end side of the heat insulating door 20. A screw insertion hole 79 is opened.

The mounting structure of the packing mounting body 51 to the heat insulating door 20 can be hooked in the lower packing groove 33A at the height position facing the lower packing groove 33A on the inner surface of the vertical portion 52. A hooking claw 54 having a downward hook shape that can be hooked on the lower hooking portion 34 formed at the opening edge of the packing groove 33A is formed over the entire length.
On the other hand, a mounting plate 65 facing the lower edge of the surface of the heat insulating door 20 is formed to rise from the outer end of the horizontal portion 55. The mounting plate 65 is formed with insertion holes 66A for four screws 66 at an appropriate interval in the length direction, and the surface of the heat insulating door 20 facing the mounting plate 65, that is, the exterior plate 21. A screw hole 22A is formed at a position aligned with each of the insertion holes 66A in the lower edge portion of the front plate 22.

  In addition, two concave grooves 67 and 68 are formed over the entire length on the upper surface of the horizontal portion 55 of the packing mounting body 51. The inner concave groove 67 is formed to have a width that extends from the wiring position of the code heater 75 on the inner side to the packing mounting portion 57 of the intermediate packing 70C. Further, as will be described later, the inner concave groove 67 functions as an escape groove that fits the back side corner portion of the lower edge portion 38A of the heat insulating door 20 to release when the packing attachment body 51 is attached. The outer concave groove 68 is formed with a small width at a position directly above the wiring position of the code heater 75 on the outer side of the warehouse.

Then, the assembly | attachment operation | movement of the seal structure part of the heat insulation door 20 is demonstrated.
First, the face seal packing 40 is mounted in a portal shape as a whole on the packing groove 33 formed on the back surface of the upper edge portion 38 and the left and right side edge portions 38 of the heat insulating door 20, and the left and right The lower end portion of the face seal packing 40 is slightly protruded from the lower surface of the lower edge portion 38 </ b> A of the heat insulating door 20.

  Next, the packing unit 50 is attached to the lower edge portion 38 </ b> A of the heat insulating door 20. First, the packing mounting body 51 is mounted, and as shown in FIG. 5, the packing mounting body 51 is placed in an oblique posture with the mounting plate 65 side lowered, and between the mounting plate 65 and the vertical portion 52, the bottom of the heat insulating door 20 is attached. The edge 38A is fitted so as to be sandwiched from the front and back. Thereafter, the vertical portion 52 is pushed upward along the back surface of the lower edge portion 38A of the heat insulating door 20, and the hooking claw 54 is formed between the upper and lower hooking portions 34 formed at the opening edge of the lower packing groove 33A. Correspond to the position. At that time, the back side corner of the lower edge 38A of the heat insulating door 20 tries to interfere with the inner end of the upper surface of the horizontal portion 55, but the back side corner fits into the groove 67 and is released. The vertical portion 52 is allowed to be pushed up.

Thereafter, the vertical portion 52 is pressed toward the back surface of the lower edge portion 38A, the latching claws 54 are inserted between the latching portions 34, and the vertical portion 52 is slightly lowered to bring the latching claws 54 into the lower side. Hang on the hook 34. Subsequently, the packing attachment body 51 is rotated in the clockwise direction in FIG. 5 around the latching portion 34 of the latching claw 54. The packing mounting body 51 is rotated in the same direction while elastically deforming the mounting plate 65 and further the horizontal portion 55. When the horizontal portion 55 hits the lower surface of the lower edge portion 38A of the heat insulating door 20, the rotation is stopped. At that time, the mounting plate 65 takes a vertical posture and faces the surface of the lower edge portion 38A. In other words, as shown in FIG. 6, the packing attachment body 51 is in a state of being closely fitted over the front surface, the lower surface, and the back surface of the lower edge portion 38 </ b> A of the heat insulating door 20.
When the packing mounting body 51 is fitted in this way, it is slid in the length direction as necessary to align the insertion hole 66A of the mounting plate 65 with the screw hole 22A on the surface of the lower edge portion 38A. The mounting plate 65 is fixed by screwing the screw 66 passed through the hole 66A into the screw hole 22A. Thereby, the attachment of the packing attachment body 51 is completed.

  Next, the cord heater 75 is press-fitted and wired in the form of a hairpin, for example, over the entire length of the two press-fitting grooves 61 formed on the lower surface of the horizontal portion 55 of the packing attachment body 51. Subsequently, the heat radiating plate 77 is slid through the insertion groove 63 on the lower surface of the horizontal portion 55 from the swing end side of the heat insulating door 20 with the rising portion 78 disposed on the rear end side. As shown in FIG. 11, the pushing is stopped when the rising portion 78 hits the lower end portion of the side surface 20A on the swing end side of the heat insulating door 20. The rising portion 78 is fixed by being screwed into the side surface 20 </ b> A through a screw (not shown) through the insertion hole 79. Accordingly, the heat radiating plate 77 is disposed in contact with the lower surface of the cord heater 75 over the entire length.

  Subsequently, the three skirt packings 70 are slid into the mounting grooves 58 and mounted on the packing mounting portions 57 provided on the lower surface of the horizontal portion 55 of the packing mounting body 51. As described above, since the skirt packings 70 have different overall lengths, when installed, as shown in FIG. 8, both ends of the external packing 70 </ b> B are end portions of the horizontal portion 55 in the packing mounting body 51. The both ends of the packing 70 </ b> A on the one side remain at positions inside the end of the vertical portion 52 of the packing attachment body 51. Note that both end portions of the intermediate packing 70 </ b> C remain at the positions of the end portions of the vertical portion 52.

When the three skirt packings 70 are attached, the extension parts 73 at both ends of the outer packing 70B are bent at right angles to the inner side as shown in FIG. 8, and then the left and right face seal packings are shown in FIG. It is further bent at a right angle toward the center in the width direction of the heat insulating door 20 so as to cover the lower end portion of 40. If it does so, since the extension end of extension part 73 of outside packing 70B will overlap with both ends of inside packing 70A, the overlapping part will be fixed by adhesion.
As a result, both side surfaces of the space between the outside packing 70B and the inside packing 70A are closed. In other words, the overall length of the lower surface of the lower edge portion 38A of the heat insulating door 20 is a horizontally long rectangular tube as a whole. The hanging packing 80 having a shape is suspended.

As shown in FIG. 2, the heat insulating door 20 to which the face seal packing 40 and the hanging packing 80 are attached is thus placed on the right side via the hinge 17 with respect to the doorway 13 formed in the front wall 12 of the storage body 11. It is attached so that it can swing open and close around the edge. At this time, the lower end portion of the hanging packing 80 is pressed against the floor surface F while being elastically deformed.
In addition, the cord heater 75 wired on the lower surface of the horizontal portion 55 in the packing attachment body 51 is connected to a power supply unit equipped in the storage body 11.

  The heat insulating door 20 is swingably opened and closed while the lower end portion of the hanging packing 80 provided on the lower surface is pressed against the floor surface F while being displaced on the floor surface F. When the door is closed, the upper edge of the rear surface is changed to the left and right side edges. The face seal packing 40 mounted in a gate shape is in contact with and closely contacts the upper and left and right mouth edges, and the lower end portion of the hanging packing 80 suspended from the lower surface is elastic to the floor surface F. By being pressed, the seal against the outside air is taken over the entire periphery of the entrance / exit 13.

Here, since the hanging packing 80 is formed in a cylindrical shape and a heat insulation space S1 (see FIG. 6) sealed inside is formed, it is effective in sealing under the door. Further, when the cord heater 75 is energized, the generated heat is dissipated into the heat insulating space S1 through the heat radiating plate 77, and the temperature rise in the heat insulating space S1 and thus the outside packing 70B can be expected. Condensation on the surface is prevented.
The cord heater 75 is disposed on the lower surface side of the horizontal portion 55 that is in close contact with the lower surface of the lower edge portion 38A of the heat insulating door 20 in the packing mounting body 51. Since the grooves 67 and 68 are formed immediately above the wiring position 75, and the heat insulating space S2 is formed between the lower surface of the lower edge portion 38A of the heat insulating door 20, the heat generated by the code heater 75 is generated. Leakage to the heat insulating door 20 side is restricted, and the heat radiating plate 77 and the heat insulating space S1 in the hanging packing 80 can be efficiently heated.

  Depending on the mounting state of the heat insulating door 20, the door closing posture varies, and particularly on the rocking end side of the heat insulating door 20, the crushing margin of the face seal packing 40 on the rocking end side varies, and the seal becomes sweet, The side surface 20A on the swing end side of the heat insulating door 20 may be cooled to cause condensation. On the other hand, in this embodiment, a rising portion 78 is provided at one end of the heat radiating plate 77 arranged in close contact with the lower surface of the cord heater 75, and this rising portion 78 is a side surface on the swing end side of the heat insulating door 20. It is attached in close contact with the lower part of 20A. Therefore, a temperature rise near the lower portion of the side surface 20A on the swing end side is expected by receiving heat from the rising portion 78, and condensation is prevented at the same location.

As described above, according to the present embodiment, the mounting structure of the packing mounting body 51 has the lower packing groove 33 </ b> A formed on the back surface of the lower edge portion 38 </ b> A of the heat insulating door 20 with the hooking claw 54 provided on the vertical portion 52. The mounting plate 65 formed on the outer end of the horizontal portion 55 is fixed to the lower portion on the surface side of the heat insulating door 20 with a screw 66 and attached. Compared with the case where both the vertical portion 52 and the horizontal portion 55 are screwed together, the screwing location can be halved, so that the mounting work of the packing mounting body 51 is simplified.
Further, since the object to which the mounting plate 65 provided at the outer end of the horizontal portion 55 is screwed is the metal exterior plate 21, unlike the synthetic resin, it is difficult to receive damage such as cracking, that is, the screw is not screwed. The attachment strength can be increased in combination with the latching structure that is difficult to come off and the attachment means of the vertical portion 52 does not cause damage to the counterpart.

  The heat insulating door 20 of the present embodiment has a structure in which a packing groove 33 in which the face seal packing 40 can be mounted is provided on the back surface side of the four peripheral edges, that is, a heat insulating door that can also be mounted at the entrance of a step-in type prefabricated refrigerator. 20 and the lower packing groove 33 </ b> A of the heat insulating door 20 is used for hooking the packing attachment body 51. The mounting structure of the packing mounting body 51 according to the present invention can be realized without providing a special heat insulating door 20, and can be manufactured at low cost.

The packing mounting body 51 is fitted to the lower edge portion 38A of the heat insulating door 20, and the hooking claw 54 is hooked on the lower packing groove 33A. Is closely fitted to the lower edge 38A. Meanwhile, the back side corner of the lower edge portion 38A of the heat insulating door 20 tries to interfere with the upper surface of the horizontal portion 55, but the interference portion fits into the recessed groove 67 provided on the upper surface of the horizontal portion 55 and escapes. Installation is performed smoothly.
After the packing attachment body 51 is mounted, the heat insulating space S2 is formed between the lower surface of the heat insulating door 20 by the concave grooves 67 and 68. Therefore, heat generated from the dew condensation prevention cord heater 75 disposed on the lower surface of the horizontal portion 55 can be prevented from leaking to the heat insulating door 20 side.

  Depending on the installed state of the heat insulating door 20, the closing posture varies, and particularly when the crushing margin of the face seal packing 40 varies on the rocking end side of the heat insulating door 20 and the seal becomes sweet, Although the side surface 20 </ b> A may be cooled and condensation may occur, in this embodiment, a rising portion 78 is provided at one end of a heat radiating plate 77 disposed in close contact with the lower surface of the cord heater 75. Since the heat insulating door 20 is closely fixed to the lower portion of the side surface 20A on the swing end side, the temperature rise near the lower portion of the side surface 20A on the swing end side is expected due to the heat from the rising portion 78. Condensation is prevented.

<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.
(1) In the above-described embodiment, the step-in type heat insulating door provided with the packing grooves on the four peripheral edges is used as it is. However, the packing grooves are provided on the three peripheral edges and the packing is attached to the lower edge portion. You may make it prepare the heat insulation door for exclusive use provided with the latching groove | channel which latches a body separately.
(2) The packing assembling procedure illustrated in the above embodiment is merely an example, and can be changed as appropriate, for example, by mounting the face seal packing after mounting the packing mounting body.
(3) In the above embodiment, the type in which the heat insulating door is swingably opened and closed is illustrated, but the present invention can be similarly applied to a slide opening and closing type.

(4) In the above embodiment, the storage body has been illustrated as an open bottom box, but the storage body is composed of a heat insulating box that also includes a base panel, and the base panel is on the floor surface. It may be placed and installed. In such a storage body, a slope is provided at the entrance and a carriage or the like is placed on the base panel. In addition, a heat insulating partition wall is provided in the storage body to divide the interior into a plurality of rooms with different cooling temperatures, and a door opening with a lower edge with a door is provided on the same partition wall so that a carriage or the like can be placed between the rooms. There are also cases where it is used in a way that allows it to enter and exit. Thus, in the storage body comprising the heat insulating box that also includes the base panel, the base panel corresponds to the “floor surface” of the present invention.
(5) The present invention is not limited to the prefabricated refrigerators exemplified in the above embodiment, but can be widely applied to all types provided with a hanging-down packing on the lower edge of the door.

  F ... Floor surface 10 ... Prefabricated refrigerator (cooling storage) 11 ... Storage body 12 ... Front wall 13 ... Entrance / exit (opening) 20 ... Heat insulation door 33 ... Packing groove 33A ... Lower packing groove (hanging groove) 34 ... Latching part 38 ... Peripheral part 38A ... Lower edge part 40 ... Face seal packing 50 ... Packing unit 51 ... Packing attachment body 52 ... Vertical part 54 ... Hook 55 ... Horizontal part 57 ... Packing attachment part 65 ... Installation Plate (mounting part) 66 ... Screw 67 ... Groove (recess) 70 ... Skirt packing 70A ... Inner packing (inner skirt packing) 70B ... Outer packing (outer skirt packing) 73 ... Extension 75 ... Code heater ( Heater) 77 ... Heat sink 78 ... Rising part 80 ... Sagging packing

Claims (5)

A storage body composed of a heat insulating box installed on the floor, an opening formed on one side surface of the storage body, the lower edge of which is open to the floor, and an opening that can be opened and closed. A heat-insulating door is provided, and on the upper edge and the left and right side edges of the rear surface of the heat-insulating door, a face seal packing that is in close contact with the corresponding mouth edge of the opening is fitted, while the lower surface of the heat-insulating door is Is a cold storage with a hanging packing in contact with the floor,
A latching groove is formed along the horizontal direction at the lower edge of the back surface of the heat insulating door,
A substantially L-shaped packing attachment body comprising a vertical portion facing the retaining groove on the back surface of the heat insulation door and a horizontal portion facing the lower surface of the heat insulation door is provided, and the horizontal portion of the packing attachment body A mounting portion for the hanging packing is provided on the lower surface, and a hooking claw for hooking on the hooking groove is provided on the inner surface of the vertical portion,
The packing mounting body can be fitted to the lower end portion of the heat insulating door by rotating the hooking claw of the vertical portion around the hooking claw from the state where the hooking claw is hooked in the hooking groove. A seal structure under the door of the cooling storage.   A packing groove in which the face seal packing can be fitted together with the other three side edges is formed on the lower edge of the heat insulating door, and the packing groove formed on the lower edge serves as the latching groove. The under-door seal structure for a cooling storage according to claim 1, wherein:   The sagging packing includes an inner skirt packing that is suspended from the inner end of the horizontal portion of the packing attachment body, and an outer skirt packing that is suspended from the outer end of the horizontal portion. The both ends in the width direction of the outer skirt packing are extended, and each extending portion is turned to the inner side, and then overlapped and joined to both ends in the width direction of the inner skirt packing. 3. The seal structure under the door of the cooling storage according to claim 1 or 2, wherein the seal structure is formed in a horizontally long cylindrical shape.   In the case where the heat insulating door can swing open and close around one vertical edge, the mounting portion of the outer skirt packing and the mounting of the inner skirt packing on the lower surface of the horizontal portion of the packing mounting body The heater is disposed along the length direction at a position between the two portions, a heat sink is disposed in contact with the lower surface of the heater, and an end of the heat insulating door on the swing end side of the heat insulating door 4. The cooling door storage under-door seal structure according to claim 3, wherein a rising portion is formed in the portion, and the rising portion is extended along a lower portion of the side surface on the swing end side of the heat insulating door. . The packing mounting body, wherein the horizontal portion of the compartment outer end mounting portion facing the lower edge of the insulating door surface is rising formed, the mounting portion becomes the structure that is screwed into the insulating door And
The upper surface of the horizontal portion of the packing attachment body is formed with a recess that allows escape to avoid interference with the heat insulating door during the attachment operation of the packing attachment body. The under-door seal structure of a cooling storage as described in any one of Claims 4.

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