JP5659005B2 - Sandwich panel end face protection structure - Google Patents

Description

  The present invention relates to a sandwich panel end face protection structure, and more particularly to a sandwich panel end face protection structure that forms a ceiling / wall part and a rear door part of a vehicle-mounted packing box.

  In some cases, a sandwich panel having a structure in which both sides of a foamed plastic plate or a non-foamed plastic plate are sandwiched between metal plates is used for a ceiling portion and a wall portion of a packing box for mounting on a vehicle.

  As shown in FIGS. 5 (a) and 5 (b) which are perspective views of the sandwich panel and FIG. 5 (c) which is a cross-sectional view, an end portion in the longitudinal direction of the core member 101 which is a plastic plate such as rigid polyurethane foam. Back reinforcement members 103a, 103b, 103c, and 103d, which are metal long plate members such as aluminum, are affixed to the counterbore 102a, 102b, 102c, and 102d provided on both the front and back surfaces of the adhesive by an adhesive, and further back reinforcement A front panel 105 and a rear panel 106, which are metal plate members such as aluminum, are attached to the front and rear surfaces of the core member 101 including the members 103 a to 103 d with an adhesive to form a sandwich panel 108.

  Since the sandwich panel 108 is excellent in heat insulation, strength, and workability, for example, the sandwich panel 108 includes a wall portion including a ceiling portion and a rear door of a cold car / refrigerated car packing box, or a wing roof for mounting on a vehicle. It is used for the wall part containing the ceiling part and rear door of a packing box (for example, refer to patent documents 1).

  The process from the manufacture of the sandwich panel 108 used in the vehicle-mounted packing box described in Patent Document 1 to the pasting of the sandwich panel 108 to the frame member 112 of the packing box is shown in FIG. The description will be given with reference.

  As shown in FIG. 6A, back reinforcing members 103a and 103b made of metal such as aluminum are attached to the counterbore 102a and 102b formed on the front and back surfaces of the longitudinal end portion of the core member 101 with an adhesive. The

  Metal front plate 105 and back plate 106 affixed to both front and back surfaces of core member 101 including back reinforcing members 103a and 103b (including back reinforcing members 103c and 103d not shown) via an adhesive, The sandwich panel 108 is manufactured by being pressed by a heating or non-heating pressing device 113 (FIG. 6B).

  As shown in FIG. 6C, the manufactured sandwich panel 108 is joined by a frame member 112 corresponding to a column or a beam and an adhesive 115. However, depending on the types of the adhesive 115 and the core member 101, chemicals may be used. It can cause reactions and the types of adhesives that can be used are limited.

  For example, a two-component mixed reaction type adhesive using an organic solvent-containing curing agent has a short curing time and excellent adhesive strength, but when used for a polystyrene core member, the core member is dissolved by a chemical reaction, This will cause a decrease in strength of the sandwich panel.

  For this reason, a one-component urethane adhesive has been used in the past, which is unlikely to cause a chemical reaction. However, it requires a curing time of about one day, and the curing time varies depending on the weather and temperature. there were.

  Therefore, in the case where an adhesive that causes a chemical reaction but has a short curing time is used, in order to prevent the adhesive 115 from touching the core member 101, as shown in FIGS. 6C and 6D. As described above, after the end face of the sandwich panel 108 is preliminarily cured with the tape 116 or the like, the assembling work of joining the sandwich panel 108 to the frame member 112 is performed.

  As shown in FIG. 6D, the back reinforcing members 102a and 102b and the frame member 112 are used to prevent the gap between the sandwich panel 108 and the frame member until the adhesive is cured and to improve the bonding strength. Can be joined with a pulling rivet 117.

JP 2010-173495 A

  Production of a packing box using the sandwich panel 108 is excellent in workability. However, the above-described curing operation on the end surface portion of the sandwich panel 108 not only increases the number of assembling operations but also increases the end surface portion. It is necessary to make the sticking state of the tape 116 constant, resulting in troublesome work.

  An object of the present invention is to provide a sandwich panel end face protection structure that eliminates the need for a curing operation of the end face of the sandwich panel, which is performed when the sandwich panel is joined to the frame member with an adhesive.

In order to achieve the above object, the present invention provides a sandwich panel end face protection structure for protecting an end face of a sandwich panel joined to a frame member of a packing box by an adhesive, and the sandwich panel is made of plastic. A core member which is a plate-shaped member made of metal, a pair of U-shaped insert members having bent portions, which are respectively pasted on the front and back surfaces of the end of the core member, and the pair of inserts A front plate and a back plate respectively attached to the front surface and the back surface of the core member on which the member is bonded, and a bent portion on one end side of the pair of insert members is formed of the core member . are respectively inserted into a groove formed on the end portion of the front and back, bent portion of the other end of the pair of insert members, sandwich panel end face coercive characterized by comprising in contact with the end face of the core member It is a structure.

In this way , the bent portion on one end side of the pair of U-shaped insert members having a bent portion pasted to the front surface and the back surface of the end portion of the core member is the end of the front surface and the back surface of the core member. are respectively inserted into a groove formed in the parts, since the bent portion of the other end side is in contact with the end face of the core member, it means that the curing of the end face is made in advance by the insert member, at the time of assembly work The step of curing the end face of the sandwich panel is not necessary, and the assembly work can be facilitated.

Bent portion of one end side of the pair of insert members, because they are inserted into the groove portion formed in an end portion of the front and back surfaces of the core member, pasting table plate and the back plate is affixed to each of the core member Even when pressing at the time of installation, the displacement of the insert member can be suppressed.

Further, the pair of insert members are attached to the front surface and the back surface of the end portion around the core member, respectively. Since the periphery of the sandwich panel is bonded to the frame member with an adhesive, the end surface of the entire periphery of the core member is brought into contact with the insert member so as to be cured.

Further, the pair of insert members having a U-shaped cross section having the bent portions are attached such that the ends of the bent portions on the other end side have a predetermined gap. When the front plate and the back plate are pressed, the insert members are pushed toward the core member by the length of the plate thickness, but at this time, the tips of the bent portions on the other end side of the insert members are in contact with each other. In order to prevent this, the above gap is provided. Therefore, the dimension of the gap is set to the minimum so that the ends of the bent portions do not contact each other during the pressing, and is set so as to suppress the exposure of the end face of the core member.

  According to the present invention, since the end surface of the core member can be cured by the insert member when the sandwich panel is manufactured, the step of curing the end surface of the sandwich panel is not required when the sandwich panel is attached to the frame member by the adhesive. The number of steps can be reduced.

  In the past, the sandwich panel was cut by NC machine in the final process and dimensioned, but by placing the insert member at a constant size, dimensioning can be performed at the temporary placement stage before the panel press process, The cutting process by the NC machine in the final process becomes unnecessary, and the number of processes can be reduced.

  In addition, it became possible to use a two-component mixed reaction type adhesive that uses an organic solvent-containing curing agent, which could not be used because of causing a chemical reaction with the core member, and expanded the selection range of adhesives. Can be achieved.

1A is a perspective view of a core member in a sandwich panel end face protection structure according to the present invention, and FIG. 1B is a perspective view of a sandwich panel having a sandwich panel end face protection structure according to the present invention. 1 (c) is a cross-sectional view of a sandwich panel having a sandwich panel end face protection structure according to the present invention. 2 (a) to 2 (d) are cross-sectional schematic process diagrams showing the process from the production of the sandwich panel having the sandwich panel end face protection structure according to the present invention to the attachment to the frame member with an adhesive. FIG. 3 (a) is a front perspective view of a wing vehicle using a sandwich panel having a sandwich panel end face protection structure according to the present invention, and FIG. 3 (b) is a rear perspective view thereof. 4 (a) is a longitudinal sectional view of the ceiling and wall of a wing vehicle using the sandwich panel having the sandwich panel end face protection structure according to the present invention, and FIG. 4 (b) is the same as the wall of the wing vehicle. FIG. 5A is a perspective view of a core member of a conventional sandwich panel, FIG. 5B is a perspective view of the conventional sandwich panel, and FIG. 5C is a cross-sectional view of the conventional sandwich panel. . 6 (a) to 6 (d) are schematic cross-sectional process diagrams illustrating the process from the production of the conventional sandwich panel to the attachment to the frame member with an adhesive.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1 (a), a sandwich panel core member 11 having a sandwich panel end face protection structure according to the present invention comprises a rectangular parallelepiped plastic plate having a predetermined thickness. Alternatively, a non-foamed plastic plate is used.

  On the front surface 12 and the back surface 13 of the core member 11, a linear groove portion 15 having a rectangular cross section is formed at the end portion in the longitudinal direction, and a linear groove portion 16 having a rectangular cross section is formed at the end portion in the short direction. The grooves 15a and 15b at the longitudinal ends of the front surface 12 and the grooves 16a and 16b at the lateral ends are orthogonal to each other at the four corners of the front surface 12, and the grooves 15c and 15d in the longitudinal direction of the back surface 13 and the lateral direction. The groove portions 16c and 16d are orthogonal to each other at the four corners of the back surface 13 as in the case of the front surface 12, although not shown.

  The groove portions 15a, 15b, 15c, 15d and the groove portions 16a, 16b, 16c, 16d include an insert member 18 that is a thin plate-like member having a U-shaped cross section as shown in FIGS. 1 (b) and 1 (c). , 19 are inserted into the bent portions 18a and 19a (see FIGS. 2A and 2B).

  The insert members 18 and 19 have the same material and shape, and are used as a pair on the front surface 12 and the back surface 13 of the core member 11. Since the bent portions 18a are inserted into the groove portions 15a to 15d and the bent portions 19a are inserted into the groove portions 16a to 16d of the insert members 18 and 19, misalignment in a pressing process described later is suppressed.

  The bent portions 18b, 19b on the other end side of the insert members 18, 19 are in contact with each other so as to cover the end surfaces 11a, 11b, 11c, 11d (see FIG. 1A) of the core member 11. The insert member 18 stuck on the front surface 12 of the core member 11 and the insert member 19 stuck on the back surface 13 facing the insert member 18 are between the ends of the bent portions 18b and 19b on the other end side. It has a predetermined gap (see FIG. 2B).

  By providing the gap, when the front plate 21 and the back plate 22 that are pasted on the front surface 12 and the back surface 13 of the core member 11, which will be described later, are pressed, the insert members 18 and 19 each have a plate thickness. Although it pushes toward the core member 11, it can suppress that the front-end | tips of the bending parts 18b and 19b contact at this time, and position shift and a deformation | transformation of the insert members 18 and 19 arise. The dimension of the gap is the smallest so that the ends of the bent portions do not come into contact with each other during the pressing, and is set so as to suppress the exposure of the end face of the core member.

  The insert members 18 and 19 are affixed to the core member 11 with an adhesive, but the bent portions 18a and 19a are inserted into the groove portions 15 and 16, so that positional displacement is suppressed even before the adhesive is solidified. It is done.

  Moreover, as shown in FIG.1 (b), the both ends of the insert members 18 and 19 stuck in the transversal direction of the core member 11 cover the end surface which the bending parts 18b and 19b exposed at the four corners of the core member. As described above, the insert members 18 and 19 are formed to extend in the longitudinal direction.

  A front panel 21 and a rear panel 22 made of aluminum are respectively applied to the front surface 12 and the rear surface 13 of the core member 11 on which the insert members 18 and 19 are pasted, and are pasted by pressing after an adhesive is applied. Is formed.

  Next, steps from the manufacture of the sandwich panel 25 to the pasting of the sandwich panel 25 to a frame member such as a column, beam or floor beam of a packing box will be described with reference to FIG.

  As shown in FIG. 2A, grooves 15b and 15c having a U-shaped cross section are formed at the longitudinal ends of the front surface 12 and the back surface 13 of the core member 11. On the front surface 12 and the back surface 13 of the core member 11, similar groove portions are formed at a longitudinal direction end portion and a short direction end portion (not shown).

  As shown in FIGS. 2 (a) and 2 (b), the pair of insert members 18, 19 which are U-shaped plate-shaped members have bent portions 18a, 19a on one end side as groove portions 15b, 15c. And the other end side bent portions 18b and 19b are affixed to the core member 11 with an adhesive in a state where they are in contact with each other so as to cover the end surface 11a of the core member 11. The insert members 18 and 19 are formed and processed so that a gap 26 is formed between the tips of the bent portions 18 b and 19 b after being attached to the core member 11.

  The insert member 11 is formed by pressing, for example, a thin steel plate that can be bent easily. On the front surface 12 and the back surface 13 of the core member 11 on which the insert member 11 is pasted, a front plate 21 and a back plate 22 that are aluminum plate-like members are each pasted by applying an adhesive.

  In addition, the insert member 11 may be formed of an extruded aluminum material as well as by pressing a steel plate, and the front plate 21 and the back plate 22 may be a steel material such as a galva steel plate.

  As shown in FIG. 2B, the front plate 21 and the back plate 22 are pressed by a press device 27 and fixed to the core member 11. Accordingly, the insert members 18 and 19 are also pressed toward the core member 11 by the length of the plate thickness. Therefore, the level | step difference by the insert members 18 and 19 is eliminated, and the front board 21 and the back board 22 are stuck in a flat state.

  Even if the insert members 18 and 19 receive pressure and move toward the core member 11 side by a length corresponding to the plate thickness between the tips of the bent portions 18b and 19b of the insert members 18 and 19, the bent portions A predetermined gap 26 is provided so as to avoid contact between the tips of 18b and 19b.

  When the insert members 18 and 19 are pressed with the movement corresponding to the plate thickness, the bent portions 18b and 19b are dimensioned so that a slight gap 26 is generated so that the tips of the bent portions 18b and 19b do not contact each other. Is processed and formed.

  The insert members 18 and 19 and the front plate 21 and the back plate 22 are attached to the core member 11 to form a sandwich panel 25 (FIG. 2C).

  As shown in FIG. 2 (c), the sandwich panel 25 is affixed to the frame member 29 corresponding to the pillars and beams of the vehicle-mounted packing box with an adhesive 31. A concave-shaped adhesive filling groove 33 is formed around the bottom of the U-shaped joint 32 of the frame member 29. After a predetermined amount of the adhesive 31 is filled in the adhesive filling groove 33, the sandwich panel 25 is inserted into the U-shaped joint portion 32. A part of the adhesive 31 is pushed out from the adhesive filling groove 33 by the tip of the sandwich panel 25 and spreads so as to come into contact with the front surface 12, the back surface 13 and the end surface 11 a of the sandwich panel 25, thereby strengthening the sticking.

Since the end surface 11a of the sandwich panel 25 is covered in advance with the bent portions 18b and 19b of the insert members 18 and 19, the bent portions 18b and 19b have a curing role for the adhesive 31. This eliminates the need for a curing work process using a tape or the like, which is performed when the frame member 29 is attached to the frame member 29, and reduces the work process.

  As shown in FIG. 2 (d), in order to prevent misalignment between the sandwich panel 25 and the frame member 29 until the adhesive 31 is hardened, and in order to strengthen the attachment of the sandwich panel 25, The insert members 18 and 19 and the frame member are joined by a pulling rivet 35 as necessary.

  As shown in FIGS. 3 (a) and 3 (b), the sandwich panel having the sandwich panel end face protection structure according to the present invention has ceiling parts 43a and 43b and side wall parts 45a and 45b of a cargo box 41 for mounting on a vehicle. And rear door portions 47a and 47b. FIG. 3 shows an example of a wing roof packing box 41. A sandwich panel having a sandwich panel end face protection structure according to the present invention includes a ceiling portion and a wall portion of a packing box such as a cold insulation refrigeration van or a freezing van. Can also be used.

As shown in FIG. 4A, one end of the sandwich panel 25 of the ceiling portion 43a of the packing box 41 of the wing roof and one end of the sandwich panel 25 of the side wall portion 45a are respectively attached to a frame member 29a corresponding to a beam member. Thus, a one-side wing roof 46a having an L-shaped cross section is formed (see FIG. 3A).

The other end of the sandwich panel 25 of the ceiling portion 43a is attached to the frame member 29b, and the other end of the side wall portion 45a is attached to the frame member 29c. The sandwich panel 25 and the frame members 29a, 29b, and 29c are attached by inserting the sandwich panel 25 into the frame members 29a, 29b, and 29c in which a predetermined amount of the adhesive 31 is filled in the adhesive filling groove 33, and the adhesive. It joins by solidifying 31 (refer FIG.2 (c)). At this time, as shown in FIG. 2, since the end surface 11a of the sandwich panel 25 is cured by the bent portions 18b and 19b of the insert members 18 and 19, the sandwich panel 25 and the frame members 29a, 29b and 29c are connected. Since the work process of curing with a tape or the like is not necessary at the time of assembling, the work process can be reduced.

4B, the end surface 11a of the sandwich panel 25 is inserted into the insert members 18 and 19 even when the sandwich panel 25 and the frame member 29d of the side wall 45a are attached to the front and rear ends of the side wall 45a. Since it is cured by the bent portions 18b and 19b, curing at the time of assembly is unnecessary (see FIG. 2).

Furthermore, since the end face of the sandwich panel used for the rear door portions 47a and 47b shown in FIG. 3 (b) is cured by the bent portions 18b and 19b of the insert members 18 and 19, as described above, Curing is not required (see Fig. 2).

  As shown in FIGS. 4A and 4B, the sandwich panel 25 and the frame members 29a, 29b, 29c, and 29d are pasted by joining with a pulling rivet in addition to pasting with an adhesive. Has been strengthened.

  As described above, the sandwich panel end face protection structure according to the present invention can cure the end face of the core member in advance by the insert member, and insert the bent portion on one end side of the insert member into the groove formed in the core member. Since it was made, the position shift can also be suppressed in the pressing process of manufacturing the sandwich panel.

  The formation of the groove portion can reduce the work process as compared with the counterbore processing formed for pasting the conventional back reinforcing member.

  In addition, by arranging the insert members at a fixed size, it is possible to dimension the sandwich panel at the temporary placement stage before the panel pressing process, eliminating the need for cutting by an NC machine in the final process previously performed, Reduction can be achieved.

  Further, the insert member also has a function as a back reinforcing member when the sandwich panel and the frame member are joined by the pulling rivet.

  The insert member is obtained by processing a thin plate made of steel. However, the insert member is not limited to this as long as it can be processed, and other materials can be used.

DESCRIPTION OF SYMBOLS 11 Core member 12 Front surface 13 Back surface 15a, 15b, 15c, 15d Groove part 16a, 16b, 16c, 16d Groove part 18 Insert member 18a, 18b Bending part 19 Insert member 19a, 19b Bending part 21 Front board 22 Back board 25 Sandwich panel 26 Gap 27 Press device 29 Frame member 31 Adhesive 32 U-shaped joint 33 Adhesive filling part 35 Pulling rivet

Claims (3)

A sandwich panel end face protection structure for protecting an end face of a sandwich panel joined to a frame member of a packing box by an adhesive,
The sandwich panel includes a core member that is a plastic plate member,
A pair of U-shaped insert members having bent portions, which are respectively pasted on the front and back surfaces of the end of the core member;
A front plate and a back plate respectively attached to the front and back surfaces of the core member on which the pair of insert members are attached;
Comprising
The bent portions on one end side of the pair of insert members are respectively inserted into groove portions formed at the front and back end portions of the core member , and the bent portions on the other end side of the pair of insert members are A sandwich panel end face protection structure characterized by being in contact with an end face of a core member. The sandwich panel end face protection structure according to claim 1, wherein the pair of insert members are respectively attached to a front surface and a back surface of an end portion around the core member. The pair of U-shaped insert members having a bent portion are pasted with a predetermined gap between the tips of the bent portions on the other end side. The sandwich panel end face protection structure as described.

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