JP2007139388A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure beautiful appearance of an external surface plate even if the external surface plate is distorted by thermal expansion. <P>SOLUTION: In the refrigerator provided with a heat insulating material between the external surface panel and an internal surface panel and applying a heat insulating structure at least to a side wall part, at least the external surface panel and/or the internal surface of the side wall part are formed as square shapes expandable in a front-rear direction and a distortion absorption part for absorbing distortion in the front-rear direction by expanding in a vertical direction at a middle part of the external surface panel and/or the internal surface panel. Thus, in the case that an outside air temperature is significantly different from a temperature in the refrigerator, even if the external surface panel and/or the internal surface panel are distorted by thermal expansion, the beautiful appearance of the external surface panel can be secured as distortion is absorbed by the distortion absorption part provided at the middle part of the external surface panel and/or the internal surface panel. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat-insulated freezer (freezer box, freezer container, etc.) having a refrigeration apparatus. The freezer is used as a stationary type or placed on a cargo bed like a freezer car. It may be used as a transport type.

  2. Description of the Related Art Conventionally, as one type of freezer car, there is one having a freezing box as a freezer in which a wall portion having a heat insulating structure is formed in a box shape (see, for example, Patent Document 1).

The left and right side walls of the freezing packing box are formed by interposing a heat insulating material between a rectangular outer plate extending in the front-rear direction and an inner plate, and the outer plate is formed in the front-rear direction. A zigzag shape in which convex portions and concave portions extending in the vertical direction are alternately arranged in the vertical direction is ensured.
JP-A-8-313150

  However, since the refrigeration carton of the above-described freezer car is unsatisfactory in aesthetics, in recent years, the outer plate has been made smooth to improve the aesthetics.

  However, when the outer surface plate is a smooth surface, in summer, etc., the surface of the outer surface plate that directly contacts the outside air at around 40 ° C. and the rear surface on the cold storage box side that is kept at −30 ° C. to −18 ° C. Since there is a large temperature difference, there is a problem that distortion deformation due to thermal expansion occurs and good aesthetics cannot be secured.

  Therefore, in the present invention, in a freezer in which a heat insulating material is interposed between the outer surface plate and the inner surface plate and at least the side wall portion has a heat insulating structure, at least the outer surface plate and / or the inner surface plate of the side wall portion are arranged in the front-rear direction. Provided is a freezer characterized in that it is formed in a rectangular shape that extends, and is provided with a strain absorbing portion that extends in the vertical direction and absorbs strain in the front-rear direction in the middle of each outer surface plate and / or inner surface plate. It is.

  The present invention is also characterized by the following configuration.

  (1) The outer surface plate and / or inner surface plate has a plurality of outer surface plate forming pieces and / or inner surface plate forming pieces adjacent to each other in the front-rear direction, and adjacent side edges of both outer surface plate forming pieces and / or inner surface plate forming pieces. A strain absorbing part that is arranged with a certain gap between the edges and extends vertically between the edges on both sides.

  (2) The strain absorbing portion has a vertical width that is substantially the same as the vertical width of the outer surface plate and / or inner surface plate, and is formed in a concave shape inward from the outer surface plate and / or inner surface plate. A concave space extending in the vertical direction was formed, and the concave space was filled with a heat insulating material or a sealing material.

  (1) In the first aspect of the present invention, in the freezer in which a heat insulating material is interposed between the outer surface plate and the inner surface plate and at least the side wall portion has a heat insulating structure, at least the outer surface plate and / or the inner surface of the side wall portion. The face plate is formed in a rectangular shape extending in the front-rear direction, and a strain absorbing portion that extends in the vertical direction and absorbs the strain in the front-rear direction is provided in the middle part of each outer face plate and / or inner face plate.

  In this way, when there is a large temperature difference between the temperature of the outside air and the temperature in the freezer, even if the outer plate and / or inner plate is distorted by thermal expansion, the outer plate and / or inner plate Since the strain is absorbed by the strain absorbing portion provided in the midway portion of the face plate, the appearance of the outer face plate can be ensured satisfactorily.

  At this time, since the strain absorbing portion extends in the vertical direction to absorb the distortion in the front-rear direction, the distortion in the front-rear direction of the outer surface plate and / or the inner surface plate formed in a rectangular shape extending in the front-rear direction. Can be absorbed reliably.

  (2) In the present invention described in claim 2, the outer surface plate and / or the inner surface plate have a plurality of outer surface plate forming pieces and / or inner surface plate forming pieces adjacent to each other in the front-rear direction, and both the outer surface plate forming pieces and / or A fixed gap is provided between adjacent side edge portions of the inner surface plate forming pieces, and a strain absorbing portion extending in the vertical direction is provided between both side edge portions.

  In this way, since the strain absorbing portion extending in the vertical direction is interposed between the side edge portions of the adjacent outer surface plate forming piece and / or inner surface plate forming piece, the adjacent outer plate is separated by the same strain absorbing portion. The distortion in the front-rear direction between the face plate forming pieces and / or the inner face plate forming pieces can be reliably absorbed. As a result, it is possible to ensure a good appearance of the outer plate.

  (3) In the present invention described in claim 3, the strain absorbing portion has a vertical width substantially the same as the vertical width of the outer surface plate and / or the inner surface plate, and is inward of the outer surface plate and / or the inner surface plate. A concave space that is formed in a concave shape and extends in the vertical direction is formed inside the concave shape, and a heat insulating material or a sealing material is filled in the concave space.

  In this manner, in the concave space having a vertical width that is inwardly concave than the outer surface plate and / or the inner surface plate and extends in the vertical direction and has substantially the same vertical width as the vertical width of the outer surface plate and / or the inner surface plate, Since the strain absorbing portion is formed by filling the heat insulating material or the sealing material, the distortion of the outer surface plate and / or the inner surface plate can be reliably absorbed through the heat insulating material or the sealing material.

  In addition, the strain absorbing portion can be effectively used as a strength member of the outer plate, and the rigidity of the outer plate can be ensured satisfactorily.

  A shown in FIGS. 1 to 3 is a freezer car equipped with a cold room 3 as a freezer according to the present invention. The freezer car A has a cabin 2 in which an operating part is disposed on the front part of the body frame 1. A van-type cold storage chamber 3 as a refrigerated cargo box is placed at a rear position of the cabin 2, front wheels 4 and 4 are provided at a lower position of the cabin 2, and a middle part of the cold storage chamber 3 The rear wheels 5 and 5 are provided in this direction.

  A refrigeration device 6 is provided at the left front portion of the body frame 1, and a cold air blowing portion 7 connected to the refrigeration device 6 is attached to the upper portion of the front wall of the cold insulation chamber 3.

  The cold room 3 is formed in a longitudinally long box shape from the ceiling portion 8, the floor portion 9, the front and rear wall portions 10 and 11, and the left and right wall portions 12 and 13. 14 is a double door side door provided on the left wall 12, and 15 is a double door rear door provided on the rear wall 11.

  In the configuration as described above, the gist of the present invention is that, as shown in FIGS. 1 and 2, at least the outer surface plates 20, 20 of the left and right side wall portions 12, 13 forming the cold insulation chamber 3 extend in the front-rear direction. In addition, a strain absorbing portion 21 that extends in the vertical direction and absorbs the strain in the front-rear direction is provided in the middle of each outer surface plate.

  Here, as shown in FIG. 1, the left side wall portion 12 is provided with only one strain absorbing portion 21 at the rear portion of the outer surface plate 20 because the side door body 14 is provided. Although the wall portion 13 is different in that it is provided at three locations of the front portion, the central portion, and the rear portion, the basic structures of the left side wall portion 12 and the right side wall portion 13 are the same. The structure of the right side wall portion 13 will be described with reference to FIG.

  That is, as shown in FIGS. 4 and 5, the right side wall portion 13 has a structure in which a rectangular plate-shaped outer surface plate 20, a heat insulating material 22, and an inner surface plate 23 extending in the front-rear direction are superposed in the inner and outer directions. None, strain absorbing portions 21, 21, 21 are provided at three locations on the front plate 20, the central portion, and the rear portion of the outer plate 20.

  As the outer surface plate 20 and the inner surface plate 23, for example, an aluminum plate material can be used, and as the heat insulating material 22, for example, styrene foam can be used.

  As shown in FIGS. 4 and 5, the outer plate 20 has a plurality (four in the present embodiment) of outer plate forming pieces 20 a, 20 a, 20 a, 20 a adjacent to each other in the front-rear direction and each outer plate. Distortion in which a fixed gap t is provided between the side edge portions 20b, 20b adjacent in the front-rear direction of the formed pieces 20a, 20a, 20a, 20a, and extends vertically between the side edge portions 20b, 20b. The strain absorbing portion 21 is disposed in the right side wall portion 13 with the absorbing portion 21 interposed.

  As shown in FIGS. 4 and 5, the strain absorbing portion 21 forms a concave space S extending in the vertical direction within the substantially rectangular cylindrical absorbing portion main body 24 extending in the vertical direction. In S, for example, a heat insulating material 25 for filling such as styrene foam is filled. Here, the absorber main body 24 can be formed of, for example, aluminum.

  The absorber main body 24 is formed to have substantially the same vertical width as the vertical width H of the outer plate 20, and a vertical groove 26 that extends in the vertical direction and coincides with the gap t is formed in the central portion of the outer wall 24a. The outer wall 24a is divided into a left outer wall 24a and a right outer wall 24a, and the outer surfaces of the left and right outer walls 24a, 24a are respectively bonded to the inner surfaces of the outer surface plate forming pieces 20a, 20a adjacent in the front-rear direction by an adhesive. At the same time, the inner wall 24b and the left and right side walls 24c, 24d are in close contact with the heat insulating material 22.

  A gap cover 27 is attached to the longitudinal groove 26 through the gap t to cover the gap t. The gap cover 27 extends in the vertical direction and is wider in the front-rear direction than the gap t. The covering piece 27a and the locking piece 27b extending from the inner surface of the covering main body 27a are molded from a synthetic resin having elasticity, and the locking piece 27b is inserted into the vertical groove 26 through the gap t. At the same time, it can be locked to the inner surfaces of the left and right outer walls 24a, 24a of the absorber main body 24.

  Moreover, the locking piece 27b can be expanded and contracted by at least the amount of distortion of the outer surface plate forming pieces 20a, 20a in the front-rear direction, which is the distortion direction of the outer surface plate forming pieces 20a, 20a, and the distortion by the strain absorbing portion 21. The absorption is not hindered.

  In this way, when there is a large temperature difference between the temperature of the outside air and the temperature in the cold insulation chamber 3, even if the outer plate 20 is distorted by thermal expansion, the adjacent outer plate forming pieces 20a, 20a are adjacent to each other. Since the strain absorbing portion 21 extending in the vertical direction is interposed between the side edge portions 20b and 20b, the strain absorbing portion 21 causes the distortion in the front and rear direction between the adjacent outer plate forming pieces 20a and 20a. Can be absorbed reliably.

  At this time, the side edge portions 20b, 20b of the outer plate forming pieces 20a, 20a are supported by the left and right outer walls 24a, 24a of the absorber main body 24 provided in the strain absorbing portion 21, and the left and right outer walls 24a , 24a are moved toward and away from each other in the front-rear direction through a longitudinal groove 26 coinciding with the gap t formed between the outer surface plate forming pieces 20a, 20a due to the deformation of the absorber main body 24 itself. It is possible to reliably absorb the distortion in the front-rear direction of the pieces 20a, 20a.

  In addition, the absorber main body 24 can also be effectively used as a strength member connected to the outer surface plate 20, and the rigidity of the outer surface plate 20 can be ensured satisfactorily.

  Next, the manufacturing method of the right side wall part 13 which comprises the distortion | strain absorption part 21 comprised as mentioned above is demonstrated, referring the manufacturing process figure shown in FIG.

  (1) As shown in FIG. 6A, the heat insulating material inner layer portion 22a is mounted on the inner surface plate 23 with an adhesive, and the heat insulating material outer layer portions 22b and 22b are placed on the heat insulating material inner layer portion 22a. In addition, the absorbent main body 24 formed in a rectangular cylinder shape is adhered and placed with an adhesive, and the outer plate 20 is adhered on the heat insulating material outer layer portions 22b and 22b and the absorbent main body 24 with an adhesive. Place.

  At this time, the heat insulating material 22 is divided into the heat insulating material inner layer portion 22a and the heat insulating material outer layer portions 22b and 22b, and the absorber main body 24 is formed in a rectangular tube shape, and the heat insulating material for filling is formed inside. The material 25 is filled.

  (2) As shown in FIG. 6 (b), the outer surface plate 20, the heat insulating material inner / outer layer portions 22a, 22b, 22b, the absorber main body 24, and the inner surface plate 23 in a laminated state are pressed. Z) to apply pressure.

  (3) As shown in FIG. 6C, the portion where the outer plate 20 and the absorber main body 24 are overlapped is cut by a cutting device (not shown), and the gap t and the longitudinal groove 26 are simultaneously formed. At the same time, outer plate forming pieces 20a, 20a are formed.

  At this time, for example, assuming that the distortion amount of the outer surface forming piece 20a is 1 mm to 2 mm, the gap t can be set to 6 mm.

  (4) As shown in FIG. 6 (d), the engaging piece 27b of the main piece 27a is inserted into the longitudinal groove 26 through the gap t and is engaged with the inner surfaces of the left and right outer walls 24a, 24a of the absorber main body 24. The gap t is covered and covered with the book piece 27a.

  Thus, in the present embodiment, the portion where the outer plate 20 and the absorber main body 24 are overlapped is cut by the cutting device, so that the gap t and the longitudinal groove 26 are formed at the same time to absorb the strain. The portion 21 can be easily formed.

  Next, the strain absorber 21 configured as described above is referred to as the first embodiment, and the configuration of the strain absorber 21 as the second to fourth embodiments is described below with reference to FIGS. While explaining.

  FIG. 7 is a cross-sectional view showing a strain absorbing portion 21 as a second embodiment. The strain absorbing portion 21 is formed by extending the absorbing portion main body 24 in the vertical direction and forming a semicircular arc-shaped cross section. The left and right edge portions of the absorbent body 24 are connected to the side edge portions 20b and 20b of the outer plate forming pieces 20a and 20a. In the present embodiment, the outer plate forming pieces 20a and 20a and the absorbing portion main body are connected. 24 are integrally formed of an aluminum plate.

  And the sealing material 28 which has elastic force is filled in the concave space S formed in the absorption part main body 24. FIG.

  In this manner, the distortion in the front-rear direction between the adjacent outer surface plate forming pieces 20a, 20a can be reliably absorbed by the absorber main body 24 via the sealing material 28.

  FIG. 8 is a cross-sectional view showing a strain absorbing portion 21 as a third embodiment. The strain absorbing portion 21 has the same basic structure as the strain absorbing portion 21 as the second embodiment. This is different in that the cross-sectional shape of the absorbent body 24 is formed in a V shape.

  In this way, also in the present embodiment, the distortion in the front-rear direction between the adjacent outer plate forming pieces 20a, 20a can be reliably absorbed by the strain absorbing portion 21.

  FIG. 9 is a cross-sectional view showing a strain absorbing portion 21 as a fourth embodiment. The strain absorbing portion 21 has the same basic structure as the strain absorbing portion 21 as the second embodiment. The difference is that the cross-sectional shape of the absorber main body 24 is formed in an inverted trapezoidal groove shape with an upper surface opening.

  In this way, also in the present embodiment, the distortion in the front-rear direction between the adjacent outer plate forming pieces 20a, 20a can be reliably absorbed by the strain absorbing portion 21.

  FIG. 10 is a cross-sectional view showing a strain absorbing portion 21 as a fifth embodiment. The strain absorbing portion 21 has the same basic structure as the strain absorbing portion 21 as the second embodiment. The difference is that the cross-sectional shape of the absorber main body 24 is formed in the shape of a square groove with an upper surface opening.

  In this way, also in the present embodiment, the distortion in the front-rear direction between the adjacent outer plate forming pieces 20a, 20a can be reliably absorbed by the strain absorbing portion 21.

  Although the present embodiment described above has been described for the case where the strain absorbing portion 21 is provided only on the outer surface plate 20, it is also possible to provide the inner surface plate 23 with the strain absorbing portion 21 as well as the outer surface plate 20. The strain absorbing portions 21 can be provided on both of the inner surface plates 23, respectively.

  At this time, an inner surface plate forming piece (not shown) of the inner surface plate 23 corresponds to the outer surface plate forming piece 20 a of the outer surface plate 20.

  As described above, according to the difference between the outside air temperature and the room temperature of the cold insulation chamber 3, the strain absorbing portion 21 is appropriately provided on the outer surface plate 20 and / or the inner surface plate 23, so that the distortion of the outer surface plate 20 and the inner surface plate 23 is reduced. Can be absorbed reliably.

  In addition, when the strain absorbing portion 21 is provided only on the inner surface plate 23, the outer surface plate 20 can be formed in a single plate shape, so that it is possible to reliably absorb strain while ensuring good aesthetics. it can.

  Moreover, in this Embodiment, although the transport-type freezer A equipped with the cold storage chamber 3 as a freezer has been demonstrated, the freezer according to the present invention is not limited to this embodiment, but as a stationary freezer. It can also be applied to a freezing box, a freezing container, or the like.

The left view of the freezer car equipped with the freezer which concerns on this invention. The right view of the freezer car. The rear view of the freezer car. The front view of a right wall part. FIG. 5 is a cross-sectional view taken along the line I-I in FIG. 4. Manufacturing process explanatory drawing of a right side wall part. Sectional drawing of the strain absorption part as 2nd Embodiment. Sectional drawing of the distortion absorption part as 3rd Embodiment. Sectional drawing of the distortion absorption part as 4th Embodiment. Sectional drawing of the distortion absorption part as 5th Embodiment.

Explanation of symbols

A Refrigeration car
12 Left side wall
13 Right wall
20 External plate
21 Strain absorber
22 Insulation
23 Internal plate
24 Absorber body
25 Filling insulation
26 Vertical groove
27 Gap cover

Claims (3)

In the freezer where the heat insulating material is interposed between the outer surface plate and the inner surface plate and at least the side wall portion has a heat insulating structure,
At least the outer surface plate and / or the inner surface plate of the side wall portion is formed in a quadrangular shape extending in the front-rear direction, and is extended vertically in the middle part of each outer surface plate and / or inner surface plate to absorb the distortion in the front-rear direction. A freezer comprising a strain absorbing portion.   The outer surface plate and / or inner surface plate has a plurality of outer surface plate forming pieces and / or inner surface plate forming pieces adjacent to each other in the front-rear direction and between adjacent side edge portions of both outer surface plate forming pieces and / or inner surface plate forming pieces. 2. The freezer according to claim 1, wherein a strain absorbing portion is disposed between the edge portions on both sides, and a strain absorbing portion extending in the vertical direction is interposed between the edge portions on both sides.   The strain absorbing portion has a vertical width substantially the same as the vertical width of the outer surface plate and / or the inner surface plate, and is formed inwardly concave than the outer surface plate and / or the inner surface plate. 3. The freezer according to claim 1 or 2, wherein a groove space extending is formed and a heat insulating material or a sealing material is filled in the groove space.

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