JP4598661B2 - Manufacturing method of side wall part of freezer - Google Patents

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 the temperature difference is large, there is a problem that distortion deformation occurs due to thermal expansion, and good aesthetics cannot be secured.

Therefore, in the present invention, a heat insulating structure is formed at least on the side wall portion by interposing a heat insulating material between the outer surface plate and the inner surface plate, and a plurality of outer surface plate forming pieces are adjacent to each other on the outer surface plate of the side wall portion. And forming a side wall portion of a freezer that includes a strain absorbing portion that extends in the vertical direction and absorbs the distortion in the front-rear direction between side edge portions of adjacent outer surface plate forming pieces, Adhere the heat insulating material on the inner plate, place it in the shape of a rectangular cylinder, and fill the heat insulating material for filling into the inside to adhere the absorber body that absorbs distortion in the front-rear direction to the heat insulating material Place and place the outer plate on the heat insulating material and the absorber main body, and press and bond the outer plate, the heat insulating material, the absorber main body, and the inner surface plate in a laminated state. Cutting the portion where the outer plate and the absorber main body are overlapped, and forming the adjacent outer plate A step of arranging a fixed gap between the side edge portions of the piece and interposing the strain absorbing portion, forming a longitudinal groove in the central portion of the outer wall which is one side of the absorbing portion main body, and covering the gap; And a step of covering the gap and the longitudinal groove with a body .

(1) In the first aspect of the present invention, a heat insulating structure is formed at least on the side wall portion by interposing a heat insulating material between the outer surface plate and the inner surface plate, and a plurality of outer surface plates are provided on the outer surface plate of the side wall portion. Forming the formed pieces adjacent to each other in the front-rear direction and extending the space between the side edge portions of the adjacent outer plate forming pieces in the vertical direction to absorb the distortion in the front-rear direction. An absorbent body that absorbs distortion in the front-rear direction by mounting a heat insulating material on an inner surface plate, forming a quadrangular cylindrical shape, and filling the inside with a heat insulating material for filling. Adhering to and placing on the heat insulating material, attaching the outer surface plate on these heat insulating material and the absorber main body, placing the outer surface plate, the heat insulating material, the absorber main body, and the inner surface plate in a laminated state And adhering by cutting the portion where the outer plate and the absorbent body are superposed, and adjacent A step of forming a fixed gap between the side edge portions of the outer plate forming piece and interposing a strain absorbing portion, and forming a longitudinal groove matching the gap in the central portion of the outer wall which is one side of the absorbing portion main body. And a step of covering the gap and the longitudinal groove with the gap cover.

In this way, by cutting the portion where the outer plate and the absorber main body are overlapped by the cutting device, it is possible to easily form the strain absorber by simultaneously forming the gap and the longitudinal groove. be able to.

  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.

  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 FIG. 1 and FIG. 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, distortion absorbing portions 21, 21, and 21 are provided at three locations, the front portion, 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 and 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.

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 II of FIG. Manufacturing process explanatory drawing of a right side wall part.

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 (1)

A heat insulating structure is formed at least on the side wall (12, 13) by interposing a heat insulating material (22) between the outer surface plate (20, 20) and the inner surface plate (23, 23), the side wall (12, 13) on the outer surface plate (20, 20), a plurality of outer surface plate forming pieces (20a, 20a, 20a, 20a) are formed adjacent to each other in the front and rear, and adjacent outer surface plate forming pieces (20a, 20a, 20a, 20a) side edge portion (20b, 20b) is a method of manufacturing the side wall portion of the freezer that is interposed between the strain absorption portion (21) that extends in the vertical direction and absorbs the strain in the front-rear direction,
The heat insulating material (22) is bonded and placed on the inner surface plates (23, 23), formed into a rectangular cylinder, and filled with the heat insulating material for filling (25) to absorb the distortion in the front-rear direction. The absorbent body (24) to be bonded is mounted on the heat insulating material (22), and the outer plate (20, 20) is mounted on the heat insulating material (22) and the absorbent body (24). A step of placing;
  A step of pressing and bonding the outer plate (20, 20), the heat insulating material (22), the absorber main body (24), and the inner plate (23, 23) in a laminated state;
  A portion where the outer plate (20, 20) and the absorber main body (24) are overlapped is cut, and side edge portions (20b, 20b) of adjacent outer plate forming pieces (20a, 20a, 20a, 20a) are cut. ) And a strain absorbing part (21) with a constant gap (t) between them, and the central part of the outer wall (24a) that is one side of the absorbing part body (24) coincides with the gap (t). Forming the longitudinal groove (26);
  And a step of covering the gap (t) and the longitudinal groove (26) with the gap cover (27).

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