Refrigerated container and method for manufacturing panel for refrigerated container

Abstract

To improve sealing performance in a connection part of divided panels near a door mounting part in a cold insulation container.SOLUTION: A cold insulation container 1 comprises a box-shaped container body 1a installed on a loading platform of a truck 2. A side panel 3 on the side surface of the container body 1a is formed with an opening part 6 for arranging a sliding door 5, the side panel 3 has a plurality of divided panels 3a, 3b, 3c arranged so as to surround the opening part 6, and the end parts of the adjacent divided panels 3a, 3b, 3c are connected together. Connection surfaces of the divided panels 3a, 3b, and 3c are a connection surface having a crank-shaped cross-sectional shape composed of an intermediate surface 21 parallel to the surfaces of the dividing panels 3a, 3b, 3c and two right-angled surfaces 22, 23 perpendicular to the intermediate surface 21.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a refrigerated container and a method for manufacturing a panel for a refrigerated container. [Background technology]

[0002] Trucks with refrigerated containers on the loading platform may be equipped with side doors (sliding doors) that slide backwards to open on the sides of the refrigerated containers to facilitate loading and unloading of cargo. In particular, in small trucks (kei cars), the surface area of ​​the side doors is large in relation to the side of the refrigerated container.

[0003] Patent Document 1 discloses not a refrigerated container but an upper structure (cross section) of a sliding door of a truck. A slide rail and a door frame are arranged at the upper part of the sliding door.

[0004] Because side doors for refrigerated containers are made of insulated panels, the weight of the side doors is heavy, requiring the door frame to have improved rigidity, and the side panel (panel for refrigerated containers) that holds the door frame also requires improved rigidity.

[0005] In addition, in the conventional processing of side panels (panels for refrigerated containers), for example, the door portion is cut and removed from a single insulating panel to process and form an opening. However, if the area of ​​the side door is large, the area of ​​the portion to be removed is also large, resulting in poor material yield, so it is considered to make the side panel into a divided structure. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 9-207578 Summary of the Invention [Problem to be solved by the invention]

[0007] The joints of the side panels (split panels) of the split structure are, for example, cut surfaces perpendicular to the inner and outer surfaces of the side panels. If a sealant is applied to these cut surfaces and the cut surfaces of the side panels are joined together, the sealing performance will decrease due to deterioration of the sealant over time and vibrations from the truck, etc., and there is an increased possibility that rainwater, etc. will enter the refrigerated container through the joints of the side panels.

[0008] Therefore, an object of the present invention is to improve the sealing performance at the joints of the dividing panels in the vicinity of the door mounting portion of a refrigerated container. [Means for solving the problem]

[0009] A refrigerated container according to one aspect of the present invention comprises a box-shaped container body to be placed on the bed of a truck, and an opening for accommodating a sliding door is formed in a side panel of the container body. The panel has a plurality of divided panels arranged to surround the opening, and is formed by joining ends of adjacent divided panels together. The joint surfaces of the divided panels have a crank-shaped cross-sectional shape composed of a middle plane parallel to the surface of the divided panel and two right-angled planes perpendicular to the middle plane.

[0010] A manufacturing method for a refrigerated container panel according to one aspect of the present invention is a method for manufacturing a refrigerated container panel that constitutes the side of a box-shaped refrigerated container to be placed on the bed of a truck. The refrigerated container panel has an opening for arranging a sliding door, and the refrigerated container panel has a plurality of divided panels arranged to surround the opening, and is formed by joining ends of adjacent divided panels together. The joint surfaces of the divided panels have a crank-shaped cross-sectional shape composed of a middle plane parallel to the surface of the divided panel and two right-angled planes perpendicular to the middle plane. Pressure is applied to the joint parts of the divided panels in the in-plane direction of the panel, and pressure is also applied to the joint parts of the divided panels in the out-of-plane direction perpendicular to the in-plane direction of the panel, to join ends of adjacent divided panels together. Effect of the Invention

[0011] According to the refrigerated container and the method for manufacturing a panel for a refrigerated container according to one aspect of the present invention, it is possible to improve the sealing performance at the joint of the divided panel in the vicinity of the door mounting portion of the refrigerated container. [Brief description of the drawings]

[0012] [Figure 1] 1 is a side view of a truck to which a refrigerated container according to an embodiment of the present invention is applied. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Diagram 3] FIG. 2 is a perspective view showing a structure in the vicinity of a door mounting portion in a refrigerated container. [Figure 4] FIG. 2 is an exploded perspective view showing a structure in the vicinity of a door mounting portion in a refrigerated container. [Diagram 5] FIG. 2 is a perspective view of a door frame in a refrigerated container as viewed from the inside of the refrigerated container. [Figure 6] 1A to 1C are explanatory diagrams showing a method for manufacturing a panel for a refrigerated container according to an embodiment of the present invention. [Figure 7] 1A to 1C are explanatory diagrams showing a method for manufacturing a panel for a refrigerated container according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0014] [Outline of refrigerated container configuration] As shown in Fig. 1, the refrigerated container 1 according to this embodiment is applied to a freight vehicle generally called a refrigerated car. In this embodiment, the refrigerated container 1 is fixed to the bed of a small freight vehicle (light truck).

[0015] The refrigerated container 1 has a box-shaped container body 1a that is placed on the bed of a truck 2. An opening 6 (see Figures 2 and 3) is formed in a side panel 3 on the left side of the container body 1a for accommodating a sliding door 5 that opens and closes in the front-rear direction (vehicle length direction).

[0016] As shown in Figures 2 to 5, a door frame (side door frame) 7 is disposed in an opening 6 formed in a side panel 3, and a roof panel 4 is connected to an upper end of the side panel 3. Corner rails 11, 12 are disposed at the connection portions (corner portions) between the side panel 3 and the roof panel 4, and the corner rails 11, 12 are fixed to the side panel 3 and the roof panel 4 with rivets 13.

[0017] An upper slide rail 14 is disposed on the upper part of the door frame 7, and a lower slide rail 15 is disposed on the lower part of the door frame 7. In addition, a seal member (weather strip) 16 and a guide rail (rail receiving body) 17 are attached to the door frame 7.

[0018] [Side Panel Detail Configuration] In this embodiment, the insulating panel that constitutes the side panel 3 has a thickness of approximately 50 mm and has a three-layer structure with plastic decorative panels attached to the inner and outer surfaces of an insulating material made of urethane foam or the like.

[0019] The side panel 3 has multiple divided panels 3a, 3b, and 3c arranged to surround the opening 6, and is configured by joining ends of adjacent divided panels 3a, 3b, and 3c. By cutting the insulation panel as described above, the side panel 3 is formed by being divided into a front side panel 3a arranged in front of the door frame 7, an upper side panel 3b arranged above the door frame 7, and a side panel main body 3c arranged behind the door frame 7.

[0020] In the refrigerated container 1 of this embodiment, the area ratio of the sliding door 5 to the side panel 3 is large, so the upper side panel 3b is inevitably elongated in the front-rear direction. Also, in the refrigerated container 1 of this embodiment, the sliding door 5 is disposed closer to the front than the side panel 3, so the front side panel 3a is inevitably elongated in the up-down direction.

[0021] The most distinctive feature of the side panel 3 of this embodiment is the shape of the joint between the divided panels (front side panel 3a, upper side panel 3b, and side panel main body 3c) shown in FIGS.

[0022] The joint surfaces of the front side panel 3a, the upper side panel 3b and the side panel main body 3c each have a hook-shaped, stepped cross-sectional shape consisting of an intermediate surface 21 parallel to the inner and outer surfaces of the dividing panels 3a, 3b, 3c and two perpendicular surfaces 22, 23 perpendicular to the intermediate surface 21.

[0023] The height (step) H of the intermediate surface 21 is, for example, approximately half the thickness T of the dividing panels 3a, 3b, and 3c (see FIG. 7). However, the height T of the intermediate surface 21 does not need to be equal between one and the other of the two right-angled surfaces 22 and 23.

[0024] The width W of the intermediate surface 21 is, for example, about 1 to 1.5 times the thickness T of the divided panels 3a, 3b, 3c (see FIG. 7). If the width W of the intermediate surface 21 is smaller than the thickness T of the divided panels 3a, 3b, 3c, the adhesive strength and sealing performance of the joints of the divided panels 3a, 3b, 3c may decrease. On the other hand, if the width W of the intermediate surface 21 is larger than 1.5 times the thickness T of the divided panels 3a, 3b, 3c, the manufacturing processability of the divided panels 3a, 3b, 3c may decrease.

[0025] In other words, it is only necessary that the joint surfaces of the adjacent divided panels 3a, 3b, 3c have a shape that allows them to fit together, and the height H and width W of the intermediate surface 21 can be set appropriately.

[0026] [Side panel manufacturing method] Such divided panels (front side panel 3a, upper side panel 3b, and side panel main body 3c) are joined together with a sealant (adhesive).

[0027] Specifically, after each of the divided panels 3a, 3b, 3c has been cut and the joint surfaces (half-notched sections) have been processed, a sealant is applied to the joint surfaces (entire surfaces) of each of the divided panels 3a, 3b, 3c, and the joint surfaces (end surfaces) of adjacent divided panels 3a, 3b, 3c are butted together.

[0028] That is, when the upper side panel 3b and the front side panel 3a are joined, the middle surface 21 of the upper side panel 3b is butted against the middle surface 21 of the front side panel 3a. Also, the first right-angled surface 22 of the upper side panel 3b is butted against the second right-angled surface 23 of the front side panel 3a, and further, the second right-angled surface 23 of the upper side panel 3b is butted against the first right-angled surface 22 of the front side panel 3a.

[0029] Then, by applying the above-mentioned sealant (adhesive), the joining surfaces (intermediate surface 21, right-angled surfaces 22, 23) of the upper side panel 3b and the front side panel 3a are filled with the sealant.

[0030] On the other hand, when the upper side panel 3b and the side panel main body 3c are joined, an intermediate surface 21 of the upper side panel 3b butts against an intermediate surface 21 of the side panel main body 3c. Also, a first right-angled surface 22 of the upper side panel 3b butts against a second right-angled surface 23 of the side panel main body 3c, and further, a second right-angled surface 23 of the upper side panel 3b butts against the first right-angled surface 22 of the side panel main body 3c.

[0031] Then, by applying the above-mentioned sealant (adhesive), the joining surfaces (intermediate surface 21, right-angled surfaces 22, 23) of the upper side panel 3b and the side panel main body 3c are filled with the sealant.

[0032] As shown in FIG. 7, when the joint surfaces of adjacent divided panels 3a, 3b, and 3c are joined together, pressure P1 is applied to the joints of the divided panels 3a, 3b, and 3c in the in-plane direction of the panels, and pressure P2 is also applied to the joints of the divided panels 3a, 3b, and 3c in the out-of-plane direction of the panels.

[0033] In other words, by hardening the sealant (adhesive) while applying the aforementioned pressures P1 and P2, the joining surfaces of the dividing panels 3a, 3b, and 3c can be joined together without any gaps, thereby improving the adhesive strength and sealing properties of the joints of the dividing panels 3a, 3b, and 3c.

[0034] At the joining surfaces of the upper side panel 3b and the front side panel 3a, the middle surface 21 of the upper side panel 3b and the middle surface 21 of the front side panel 3a are joined without any gaps. Also, the first right-angled surface 22 of the upper side panel 3b and the second right-angled surface 23 of the front side panel 3a are joined without any gaps, and further, the second right-angled surface 23 of the upper side panel 3b and the first right-angled surface 22 of the front side panel 3a are joined without any gaps.

[0035] On the other hand, at the joining surfaces of the upper side panel 3b and the side panel main body 3c, the intermediate surface 21 of the upper side panel 3b and the intermediate surface 21 of the side panel main body 3c are joined without any gaps. Also, the first right-angled surface 22 of the upper side panel 3b and the second right-angled surface 23 of the side panel main body 3c are joined without any gaps, and further, the second right-angled surface 23 of the upper side panel 3b and the first right-angled surface 22 of the side panel main body 3c are joined without any gaps.

[0036] [Structural features of the upper side panel] As described above, the upper side panel 3b is elongated in the front-rear direction, and the length of the upper side panel 3b in the vertical direction is short. As shown in Fig. 2, the door frame 7 is made of metal and has an L-shaped basic cross section, and is fixed to the upper side panel 3b by rivets 18 in contact with two surfaces, the lower surface (cut surface) and the outer surface. That is, the door frame 7 is disposed at the lower part of the upper side panel 3b, which is short in the vertical direction. In addition, the corner rails 11 and 12 are disposed at the connection part (corner part) between the upper side panel 3b and the roof panel 4, and fixed by rivets 13. That is, the corner rails 11 and 12 are disposed at the upper part of the upper side panel 3b, which is short in the vertical direction.

[0037] In other words, the upper side panel 3b has a shorter length in the vertical direction, the door frame 7 is disposed at the bottom of the upper side panel 3b, and the corner rails 11, 12 are disposed at the top of the upper side panel 3b. The door frame 7 and the corner rails 11, 12 form a structure that reinforces the upper side panel 3b, so that the rigidity of the upper side panel 3b is increased. For example, when rolling (moment around the longitudinal axis) acts on the freight vehicle 2, the force due to the rolling acts on the refrigerated container 1, and the sliding door 5 is resistant to distortion.

[0038] [Effects, etc.] The effects of this embodiment will be described below.

[0039] (1) The refrigerated container 1 comprises a box-shaped container body 1a to be placed on the bed of a truck 2, and an opening 6 for accommodating a sliding door 5 is formed in a side panel 3 on the side of the container body 1a. The side panel 3 has a plurality of divided panels (a front side panel 3a, an upper side panel 3b, and a side panel body 3c) arranged to surround the opening 6, and is formed by joining ends of adjacent divided panels 3a, 3b, and 3c. The joint surfaces of the divided panels 3a, 3b, and 3c have a crank-shaped cross-sectional shape composed of an intermediate surface 21 parallel to the inner and outer surfaces of the divided panels 3a, 3b, and 3c, and two right-angled surfaces 22 and 23 perpendicular to the intermediate surface 21.

[0040] In conventional joining structures, generally, the cut surfaces perpendicular to the inner and outer surfaces of the partition panels are joined, so the joining area between the partition panels is small, and the sealing performance decreases due to aging of the sealant, etc., and there is a possibility that rainwater, etc. may enter the refrigerated container. In contrast, in the joining structure of this embodiment, the joining surfaces of the partition panels 3a, 3b, 3c are formed into a hook-shaped step shape (crank shape) and joined. Therefore, the joining area between the partition panels 3a, 3b, 3c is increased compared to the conventional joining structure, the sealing performance is improved, and the possibility that rainwater, etc. may enter the refrigerated container 1 is reduced.

[0041] In addition, because the area ratio of the sliding door 5 is large, the front side panel 3a and the upper side panel 3b have an elongated shape in the up-down or front-rear direction, which naturally makes the joint smaller and tends to weaken the strength of the side panels 3. However, because the door frame 7 is disposed near the joint between the front side panel 3a and the upper side panel 3b so as to surround the outer periphery of the sliding door 5, the rigidity of the joint between the front side panel 3a and the upper side panel 3b is maintained.

[0042] (2) When the ends of adjacent divided panels 3a, 3b, and 3c were joined together, pressure P1 was applied to the joints of the divided panels 3a, 3b, and 3c in the in-plane direction of the panels, and pressure P2 was also applied to the joints of the divided panels 3a, 3b, and 3c in the out-of-plane direction of the panels.

[0043] Pressure P1 is applied to the joining surfaces of the divided panels 3a, 3b, and 3c, which are formed with a hook-shaped, stepped (crank-shaped) cross section, in the panel in-plane direction, and pressure P2 is also applied in the panel out-plane direction while applying pressure to join them, which increases adhesion especially at the intermediate surface 21. This improves adhesion between the end surfaces of the divided panels 3a, 3b, and 3c, and also improves the dimensional accuracy of the side panel 3 after joining.

[0044] (3) In a method for manufacturing a panel for a refrigerated container (side panel 3) constituting a side surface of a box-shaped refrigerated container 1 to be placed on the bed of a truck 2, an opening 6 for arranging a sliding door 5 is formed in the side panel 3. The side panel 3 has a plurality of divided panels (a front side panel 3a, an upper side panel 3b, and a side panel main body 3c) arranged to surround the opening 6, and is formed by joining ends of adjacent divided panels 3a, 3b, and 3c. The joint surfaces of the divided panels 3a, 3b, and 3c have a crank-shaped cross-sectional shape composed of an intermediate surface 21 parallel to the inner and outer surfaces of the divided panels 3a, 3b, and 3c, and two right-angled surfaces 22 and 23 perpendicular to the intermediate surface 21. Pressure P1 is applied to the joints of the divided panels 3a, 3b, and 3c in the in-plane direction of the panels, and pressure P2 is also applied to the joints of the divided panels 3a, 3b, and 3c in the out-of-plane direction perpendicular to the in-plane direction of the panels, to join the ends of adjacent divided panels 3a, 3b, and 3c.

[0045] Pressure P1 is applied to the joining surfaces of the divided panels 3a, 3b, and 3c, which are formed with a hook-shaped, stepped (crank-shaped) cross section, in the panel in-plane direction, and pressure P2 is also applied in the panel out-plane direction while applying pressure to join them, which increases adhesion especially at the intermediate surface 21. This improves adhesion between the end surfaces of the divided panels 3a, 3b, and 3c, and also improves the dimensional accuracy of the side panel 3 after joining.

[0046] Incidentally, the refrigerated container and the panel for the refrigerated container of the present invention have been described using the above-mentioned embodiment as an example, but they are not limited to this embodiment and various other embodiments can be adopted without departing from the gist of the present invention.

[0047] For example, the refrigerated container is not limited to the freezer vehicle described in the above embodiment, but can be applied to a refrigerated vehicle, a refrigerated and frozen vehicle, etc. Also, the refrigerated container is not limited to the small freight vehicle described in the above embodiment, but can be applied to a medium-sized freight vehicle, a large freight vehicle, etc. [Explanation of symbols]

[0048] 1. Refrigerated container 1a Container body 2 Freight vehicles 3 Side panels (panels, panels for refrigerated containers) 3a Front side panel (split panel) 3b Upper side panel (split panel) 3c Side panel body (split panel) 5. Sliding Door 6 Openings 21 Intermediate Surface 22 Right angle surface 23 Right angle surface

Claims

1. It has a box-shaped container body that is placed on the bed of a freight car, An opening for disposing a sliding door is formed in a side panel of the container body, and a door frame is disposed in the opening; The panel has a divided panel formed by dividing it into a front side panel arranged in front of the door frame, an upper side panel arranged above the door frame, and a side panel main body arranged behind the door frame, and is configured by joining ends of the adjacent divided panels together, The joint surface of the dividing panel is a joint surface having a crank-shaped cross-sectional shape composed of an intermediate surface parallel to the surface of the dividing panel and two perpendicular surfaces perpendicular to the intermediate surface. Cooling container.

2. A method for manufacturing a panel for a refrigerated container which constitutes a side surface of a box-shaped refrigerated container to be placed on the bed of a freight vehicle, comprising the steps of: The panel for the refrigerated container has an opening for arranging a sliding door, and a door frame is arranged in the opening; the panel for the refrigerated container has a divided panel formed by dividing it into a front side panel arranged in front of the door frame, an upper side panel arranged above the door frame, and a side panel main body arranged behind the door frame, and is configured by joining ends of the adjacent divided panels; The joint surface of the dividing panel has a crank-shaped cross-sectional shape composed of an intermediate surface parallel to a surface of the dividing panel and two perpendicular surfaces perpendicular to the intermediate surface, applying pressure to the joint portion of the dividing panel in a panel in-plane direction and also applying pressure to the joint portion of the dividing panel in a panel out-plane direction perpendicular to the panel in-plane direction to join the ends of the adjacent dividing panels; A method for manufacturing panels for refrigerated containers.

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