JP2018202620A - Structure and production method - Google Patents

Abstract

To provide a structure capable of achieving weight saving compared to a case of using an H-section steel and capable of guaranteeing rigidity under high temperature, and to provide a method for production thereof.SOLUTION: There is provided a structure comprising a front wall, a spacer member, a back wall and a platy member. The platy member is arranged to at least one of the positions between the front wall and spacer member and between the back wall and spacer member, and is provided to cover a part of the facing surface of the front wall side or back wall side of the spacer member. The front wall and the spacer member are mutually fastened at the exposure area of the front wall side which is not covered by the platy member, and the back wall and the spacer member are mutually fastened at the exposure area of the back wall side which is not covered by the platy member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a structure and a manufacturing method thereof.

  Patent Document 1 discloses a laminate and a method for manufacturing the same, which can increase the strength and suppress the occurrence of distortion after molding regardless of the size. Here, in patent document 1, in order to raise an intensity | strength, H-section steel is utilized as a reinforcement member.

JP 2008-247003 A

  However, since the H-section steel is inserted into the resin in order to improve the rigidity, the H-section steel becomes heavy.

  The present invention has been made in view of such circumstances, and provides a structure capable of realizing weight reduction and ensuring rigidity as compared with the case of using H-section steel, and a method for manufacturing the structure. Is.

  According to the present invention, a front wall, a spacer member, a back wall, and a plate-like member are provided, and the plate-like member is between the front wall and the spacer member, and between the back wall and the spacer member. The plate-like member is provided so as to cover a part of the front wall side facing surface or the back wall side facing surface of the spacer member, and the front wall and the spacer member are formed in the plate shape. A structure is provided in which the back wall and the spacer member are fixed to each other in the exposed region not covered by the plate, and the back wall and the spacer member are fixed to each other in the exposed region of the back wall not covered by the plate-like member. The

  The structure according to the present invention includes a front wall, a spacer member, a back wall, and a plate-like member. The plate-like member is disposed between at least one of the front wall and the spacer member and between the back wall and the spacer member. The plate-like member is provided so as to cover a part of the front wall side facing surface or the back wall side facing surface of the spacer member. Further, the front wall and the spacer member are fixed to each other in the exposed region on the front wall side that is not covered by the side plate member. The back wall and the spacer member are fixed to each other in the back wall side exposed region that is not covered by the side plate member. For this reason, rigidity improves because a plate-shaped member and a spacer member behave as an integral structure.

  Also, the first and second resin sheets are suspended between the first and second molds, and the insert member (a member configured by sandwiching the spacer member between the front wall and the back wall side plate-like member) is the first or second. Since the structure can be manufactured by fixing the two resin sheets and clamping the first and second molds, the manufacturing is easy.

Hereinafter, various embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.
Preferably, the plate member includes a front wall side plate member and a back wall side plate member, the front wall, the front wall side plate member, the spacer member, the back wall side plate member, A back wall is provided in this order, the front wall side plate-like member is provided so as to cover a part of the front wall side facing surface of the spacer member, and the front wall and the spacer member are formed by the front wall side plate-like member. Adhered to each other in the uncovered front wall side exposed region, the back wall side plate-like member is provided so as to cover a part of the back wall side facing surface of the spacer member, the back wall and the spacer member, The back wall side exposed regions that are not covered by the back wall side plate-like member are fixed to each other.
Preferably, the area of the region defined by the outer periphery of the plate-like member is 1/3 or more of the area of the front wall side facing surface or the back wall side facing surface of the spacer member.
Preferably, the thickness of the plate-like member is 1/10 or less of the thickness of the spacer member.
Preferably, the spacer member has a convex portion in the front wall side exposed region and the back wall side exposed region, and the front wall and the spacer member are fixed in the convex portion, and the back wall and the spacer The member is fixed on the convex portion.
Preferably, the plate-like member has an opening, and the convex portion is provided at a position corresponding to the opening.
Preferably, the plate-like member has a plurality of openings, and the convex portion is provided at a position corresponding to each of the plurality of openings.
Preferably, the opening of the front wall side plate-like member and the opening of the back wall side plate-like member are provided at positions facing each other.
Preferably, the opening and the convex have substantially the same planar shape.
Preferably, the heat resistance temperature of the plate-shaped member is higher than the heat resistance temperature of the spacer member.
Preferably, the spacer member is a foam.
Preferably, the plate member is a metal plate.
In another aspect, it comprises a drooping process, an insert process, and a mold clamping process. In the dripping process, the first and second resin sheets are drooped between the first and second molds. In the insert process, The insert member is fixed to the first or second resin sheet, and in the mold clamping step, the first and second molds are clamped, and the insert member is a spacer by a front wall side plate member and a back wall side plate member. Provided is a method for manufacturing a structure that includes members.

FIG. 1A is a partially cutaway perspective view of the structure 70. FIG. 1B is an enlarged view of a notch portion in FIG. 1A. It is a perspective view of five members which constitute structure 70 of one embodiment of the present invention. Here, in FIG. 2, a peripheral wall formed by the front wall 50F and the back wall 50R is omitted. FIG. 3A is a cross-sectional view of a plane defined by points P1 to P3 in FIG. 1A. 3B is a partially enlarged view of region X in FIG. 3A. It is sectional drawing of the surface prescribed | regulated by the points Q1-Q3 of FIG. 1A. FIG. 4 is a perspective view illustrating a state in which an opening 41 of a plate-like member 40 is fitted to a convex portion 33 of a spacer member 30. It is sectional drawing corresponding to FIG. 3A of the insert member 60. FIG. FIG. 5 is a cross-sectional view of the insert member 60 corresponding to FIG. 8A and 8B are diagrams for explaining a method for manufacturing the insert member 60. 9A to 9C are diagrams illustrating a post-process of FIG. It is a figure which shows an example of the molding machine which can be utilized with the manufacturing method of the structure. It is an expanded sectional view near the 1st and 2nd metallic molds 21 and 22 and the 1st and 2nd resin sheets 23a and b. It is a figure showing a mode that the 1st and 2nd resin sheet 23a, b was vacuum-sucked from the state of FIG. It is a figure showing the state which fixed the spacer member 30 to the 2nd resin sheet 23b. It is sectional drawing showing the state which clamped the 1st and 2nd metal mold | die 21,22. It is a top view showing the plate-shaped member 40 which concerns on the modification 1 of one Embodiment. It is sectional drawing of the side surface of the plate-shaped member 40 which concerns on the modification 2 of one Embodiment. It is sectional drawing of the structure 70 which concerns on the modification 3 of one Embodiment, and is a figure corresponding to FIG. It is the elements on larger scale in the area | region Y of FIG.

  Hereinafter, embodiments of the present invention will be described. Various characteristic items shown in the following embodiments can be combined with each other. In addition, the invention is independently established for each feature.

1. Structure 70
As shown in FIGS. 1 and 2, the structure 70 according to an embodiment of the present invention includes a front wall 50 </ b> F, a spacer member 30, a back wall 50 </ b> R, and a plate-like member 40. The plate-like member 40 is disposed between at least one of the front wall 50F and the spacer member 30 and between the back wall 50R and the spacer member 30. In the present embodiment, the plate member 40 includes a front wall side plate member 40F and a back wall side plate member 40R. The plate member 40 is provided so as to cover a part of the front wall side facing surface 31 or the back wall side facing surface 32 of the spacer member 30. Specifically, in the present embodiment, the front wall side plate-like member 40 </ b> F is provided so as to cover a part of the front wall side facing surface 31 of the spacer member 30. Further, the front wall 50F and the spacer member 30 are fixed to each other in the front wall side exposed region that is not covered by the front wall side plate-like member 40F. The back wall side plate-like member 40 </ b> R is provided so as to cover a part of the back wall side facing surface 32 of the spacer member 30. Further, the back wall 50R and the spacer member 30 are fixed to each other in the back wall side exposed region that is not covered by the back wall side plate-like member 40R. The heat resistant temperatures of the front wall side plate member 40F and the back wall side plate member 40R are higher than the heat resistant temperature of the spacer member 30, respectively. Details of this structure will be described later with reference to FIGS. In addition, the thick line in a figure represents the parting line PL.

  In this embodiment, the spacer member 30 is a foam. A plurality of convex portions 33 are respectively formed on the front wall side facing surface 31 and the back wall side facing surface 32 of the spacer member 30. In this embodiment, the convex part 33 is formed in the front wall side exposed area | region which is not covered by the front wall side plate-shaped member 40F, and the back wall side exposed area | region which is not covered by the back wall side plate-shaped member 40R. Here, the shape and number of the convex portions 33 are arbitrary and can be designed as appropriate. The height of the convex portion 33 is preferably 0.1 to 5 mm, for example. Specifically, for example, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 2, 3, 4, 5 mm, and may be within a range between any two of the numerical values exemplified here. Here, as a raw material of the foam, for example, polystyrene and polyethylene can be used.

  Moreover, it is preferable that the thickness of the spacer member 30 is 5 mm or more. The thickness is, for example, 5 to 50 mm, and preferably 10 to 30 mm. Specifically, for example, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, 30, 35, 40, 45, 50 mm, and may be within a range between any two of the numerical values exemplified here.

  In the present embodiment, the front wall side plate-like member 40F and the back wall side plate-like member 40R are constituted by separate members separated from each other. The front wall side plate member 40F and the back wall side plate member 40R are metal plates. The heat resistance temperature of the front wall side plate member 40F and the back wall side plate member 40R is higher than the heat resistance temperature of the spacer member 30. For example, the rigidity of the front wall side plate-like member 40F and the back wall side plate-like member 40R is 200 to 500 kg at a high temperature (eg, 80 ° or more). Further, the front wall side plate member 40 </ b> F and the back wall side plate member 40 </ b> R have an opening 41. Further, the convex portion 33 is provided at a position corresponding to the opening 41.

  1B and 3B, in the present embodiment, the opening 41 of the front wall side plate-like member 40F and the opening 41 of the back wall side plate-like member 40R are provided at positions facing each other. Moreover, the convex part 33 of the front wall side opposing surface 31 and the convex part 33 of the back wall side opposing surface 32 are provided in the position which mutually opposes. Thereby, as shown in FIG. 2, the opening 41 of the front wall side plate-shaped member 40F, the convex portion 33 of the front wall side facing surface 31, the convex portion 33 of the back wall side facing surface 32, and the back wall side plate shape The opening 41 of the member 40R overlaps in plan view. According to such a configuration, the symmetry of the structure 70 is increased, and the fixing portion on the front side and the back side is the shortest distance, so that the strength of the structure 70 is increased.

  In the present embodiment, a plurality of openings 41 are formed in each of the front wall side plate member 40F and the back wall side plate member 40R. Further, the convex portion 33 is provided at a position corresponding to each of the plurality of openings 41. Furthermore, in this embodiment, the opening part 41 and the convex part 33 have substantially the same planar shape. Thereby, when the convex part 33 is fitted in the opening part 41, it becomes difficult to come off. Then, the front wall side plate-like member 40F and the back wall side plate-like member 40R are brought close to the spacer member 30 from the front wall side facing surface 31 and the back wall side facing surface 32 side of the spacer member 30, and the opening 41 is formed in the convex portion 33. The insert member 60 (see FIG. 11) is formed in the fitted state (see FIGS. 5 to 7).

  In the present embodiment, the areas defined by the outer peripheries of the front wall side plate member 40F and the back wall side plate member 40R facing the spacer member 30 are the front wall side facing surface 31 and the back wall of the spacer member 30, respectively. It is preferably 1/3 to 3/2 of the area of the side facing surface 32. The value of (the area of the region defined by the outer peripheries of the front wall side plate-like member 40F and the back wall side plate-like member 40R) / the area of the front wall side facing surface 31 and the back wall side facing surface 32 of the spacer member 30) is 0. .3 to 1.5, preferably 0.5 to 1, and more preferably 0.6 to 0.9. Specifically, for example, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1. 4, 1.5, and may be within a range between any two of the numerical values exemplified here. In the present embodiment, the areas of the front wall side facing surface 31 and the back wall facing surface 32 of the spacer member 30 are smaller than the areas of the front wall facing surface 31 and the back wall facing surface 32 of the spacer member 30. It has become.

  Moreover, it is preferable that the thickness of the front wall side plate-shaped member 40F and the back wall side plate-shaped member 40R is 0.1-2 mm, respectively. Specifically, for example, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.. 2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2 mm, and within the range between any two of the numerical values exemplified here. May be.

  Furthermore, the thickness of the front wall side plate-like member 40F and the back wall side plate-like member 40R is preferably 1/10 to 1/200 of the thickness of the spacer member 30. Specifically, the value of (thickness of the front wall side plate-like member 40F or the back wall side plate-like member 40R) / (thickness of the spacer member 30) is, for example, 0.1, 0.05, 0.03, 0 0.025, 0.02, 0.015, 0.01, 0.005, and may be within a range between any two of the numerical values exemplified here.

  In the present embodiment, the front wall 50F and the back wall 50R are formed of resin.

2. Structure Next, the structure of the structure 70 will be described with reference to FIGS. 3 and 4. As shown in FIG. 3B, in a state where the convex portions 33 of the spacer member 30 are fitted in the openings 41 of the front wall side plate member 40F and the back wall side plate member 40R, the two plate members 40 are sandwiched. A wall 50F and a back wall 50R are formed. Accordingly, the front wall 50F and the spacer member 30 are fixed to each other at the convex portion 33 through the opening 41 of the front wall side plate-like member 40F. Further, the back wall 50R and the spacer member 30 are fixed to each other at the convex portion 33 through the opening 41 of the back wall side plate-like member 40R. Such fixation is realized at the time of molding described later with reference to FIGS.

  As shown in FIG. 4, even when viewed from another angle, the front wall 50F and the back wall 50R are respectively convex portions 33 through the openings 41 of the front wall side plate member 40F and the back wall side plate member 40R. Are fixed to the spacer member 30.

  With this configuration, the front wall side plate-like member 40F, the back wall side plate-like member 40R, and the spacer member 30 behave as an integral structure, thereby improving rigidity. Furthermore, the front wall side plate-like member 40F and the back wall side plate-like member 40R have a higher heat resistance temperature than the spacer member 30, so that the temperature is higher than when the front wall side plate-like member 40F and the back wall side plate-like member 40R are not provided. The lower rigidity is improved. Furthermore, compared with the case where one H-shaped steel is inserted into the resin, the present embodiment using the front wall side plate-like member 40F and the back wall side plate-like member 40R has higher rigidity and contributes to the thinning of the structure 70. can do.

3. Next, a method for manufacturing the insert member 60 will be described. The insert member 60 is molded by a bead method in-mold foam molding method using a molding apparatus 90 shown in FIGS. As shown to FIG. 8A, the shaping | molding apparatus 90 is provided with the type | molds 91 and 92 arrange | positioned facing. The molds 91 and 92 constitute part of the vacancies 93 and 94, respectively. Cooling pipes 81 and 82 are disposed in the vacant chambers 93 and 94. Further, the front wall side plate-like member 40F and the back wall side plate-like member 40R are arranged in the molds 91 and 92, respectively.

When the molds 91 and 92 are closed from the state shown in FIG. 8A, a cavity 90a which is a sealed space by the molds 91 and 92 is formed as shown in FIG. 8B. With the molds 91 and 92 closed, the foam beads are filled through the feeders 83 and 84. The amount of foam beads to be filled is, for example, 105 to 110% of the volume of the cavity 90a. Next, as shown in FIG. 9A, steam (for example, a vapor pressure of 3.0 to 3.5 kgf / cm ² ) is injected into the vacant chambers 93 and 94 from the steam injection ports 95 and 96, for example, for 10 to 30 seconds. The vapor enters the bubbles in the foam beads and voids between the individual pores formed in the mold, and fuses the beads together. Thereafter, as shown in FIG. 9B, cooling water is injected into the cooling pipes 81 and 82 from the cooling water inlets 97 and 98, and sprayed onto the molds 91 and 92 to cool the molds 91 and 92 and the spacer member 30 to be spacers. The member 30 is solidified. Next, as shown in FIG. 9C, the mold is opened and the spacer member 30 is taken out. Thereby, as shown in FIG. 5 and the like, the insert member 60 in which the convex portions 33 of the spacer member 30 are fitted in the plurality of openings 41 of the front wall side plate member 40F and the back wall side plate member 40R is formed. . Thereafter, the insert member 60 is cured in a room at 50 to 70 ° C. for 12 to 24 hours, for example, to accelerate hardening and prevent sink marks and deformation.

  In addition, by separately preparing the spacer member 30, the front wall side plate member 40F, and the back wall side plate member 40R, and fitting the front wall side plate member 40F and the back wall side plate member 40R to the spacer member 30 later. The insert member 60 may be manufactured.

4). Configuration of Molding Machine 1 Next, a molding machine 1 that can be used for carrying out a method for manufacturing a foam molded body according to an embodiment of the present invention will be described with reference to FIGS. 10 and 11. The molding machine 1 includes a resin supply device 2, a T die 18, and first and second molds 21 and 22. The resin supply device 2 includes a hopper 12, an extruder 13, and an accumulator 17. The extruder 13 and the accumulator 17 are connected via a connecting pipe 25. The accumulator 17 and the T die 18 are connected via a connecting pipe 27. Hereinafter, each configuration will be described in detail.

<Hopper 12, Extruder 13>
The hopper 12 is used for charging the raw resin 11 into the cylinder 13 a of the extruder 13. Although the form of the raw material resin 11 is not specifically limited, Usually, it is a pellet form. The raw material resin is, for example, a thermoplastic resin such as polyolefin, and examples of the polyolefin include low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymer, and a mixture thereof. The raw material resin 11 is poured into the cylinder 13a from the hopper 12 and then melted by being heated in the cylinder 13a to become a molten resin. Moreover, it is conveyed toward the front-end | tip of the cylinder 13a by rotation of the screw arrange | positioned in the cylinder 13a. A screw is arrange | positioned in the cylinder 13a and conveys molten resin by kneading | mixing by the rotation. A gear device is provided at the base end of the screw, and the screw is driven to rotate by the gear device. The number of screws arranged in the cylinder 13a may be one or two or more.

<Accumulator 17, T-die 18>
The foamed resin obtained by melt-kneading the raw material resin and the foaming agent is extruded from the resin extrusion port of the cylinder 13 a and injected into the accumulator 17 through the connecting pipe 25. The accumulator 17 includes a cylinder 17a and a piston 17b that can slide inside the cylinder 17a, and the molten resin 11a can be stored in the cylinder 17a. Then, by moving the piston 17b after a predetermined amount of foamed resin is stored in the cylinder 17a, the foamed resin is pushed out from the slit provided in the T-die 18 through the connecting pipe 27, and is dropped. Resin sheets 23a and 23b are formed.

<First and second molds 21, 22>
The first and second resin sheets 23 a and 23 b are guided between the first and second molds 21 and 22. As shown in FIG. 11, the first mold 21 is provided with a number of vacuum suction holes (not shown), and the first resin sheet 23 a is sucked under reduced pressure along the cavity 21 b of the first mold 21. It is possible to shape into different shapes. The cavity 21b has a shape having a recess 21c, and a pinch-off portion 21d is provided so as to surround the recess 21c. The second mold 22 is provided with a number of reduced-pressure suction holes (not shown), and the second resin sheet 23b is sucked under reduced pressure and shaped into a shape along the cavity 22b of the second mold 22. Is possible. The cavity 22b has a shape having a recess 22c, and a pinch-off portion 21d is provided so as to surround the recess 22c.

5. Method for Manufacturing Structure 70 Here, a method for manufacturing a foam molded body according to an embodiment of the present invention will be described with reference to FIGS. The method of the present embodiment includes a drooping process, an insert process, and a mold clamping process. Details will be described below.

5.1 Dripping Process In the dripping process, as shown in FIG. 11, the insert member 60 is disposed between the first and second molds 21 and 22. Here, in the present embodiment, the insert member 60 is configured such that the spacer member 30 is sandwiched between the front wall side plate-like member 40F and the back wall side plate-like member 40R. Moreover, in this embodiment, since the opening part 41 of the front wall side plate-shaped member 40F and the back wall side plate-shaped member 40R is fitted in the convex part 33 of the spacer member 30, the insert member 60 is stabilized. Then, between the first and second molds 21 and 22, the first and second resin sheets 23 a and 23 b formed by extruding the foamed resin in a molten state from the slit of the T die 18 and hanging down are suspended. In the present embodiment, since direct vacuum forming is performed using the first and second resin sheets 23a and 23b extruded from the T-die 18 as they are, the first and second resin sheets 23a and 23b are allowed to have room temperature before forming. The solidified first and second resin sheets 23a and 23b are not heated before being molded. Here, in FIG. 11, the insert member 60 is illustrated between the first and second resin sheets 23 a and 23 b during the drooping process. However, in the drooping process, the insert member 60 is waited at another place. It may be left.

5.2 Inserting Step Next, as shown in FIG. 12, the first and second molds are obtained by sucking the first and second resin sheets 23a and 23b under reduced pressure by both the first and second molds 21 and 22. The shape is formed along the cavities 21b of 21 and 22. Then, the insert member 60 is inserted between the first and second molds 21 and 22 and moved in the direction of the second resin sheet 23b. And as shown in FIG. 13, the insert member 60 adheres to the 2nd resin sheet 23b by making the 2nd resin sheet 23b and the insert member 60 contact. Here, in the present embodiment, the fixation includes welding of a molten resin and another resin (foam). Note that the insert member 60 may be fixed to the first resin sheet 23a first.

5.3 Mold Clamping Process In this process, the first and second molds 21 and 22 are clamped as shown in FIG. By such clamping, the first resin sheet 23a becomes the front wall 50F, and the second resin sheet 23b becomes the back wall 50R. And the molded object of the shape along the cavities 21b and 22b of the 1st and 2nd metal mold | dies 21 and 22 is obtained. At this time, since the first and second resin sheets 23a and 23b are at a high temperature, the first and second resin sheets 23a and 23b come into contact with the spacer member 30 through the openings 41 of the front wall side plate member 40F and the back wall side plate member 40R. The 50F and the back wall 50R are firmly fixed to the spacer member 30, respectively. Furthermore, in this embodiment, the area of the area | region prescribed | regulated by the outer periphery of the front wall side plate-shaped member 40F and the back wall side plate-shaped member 40R is the area of the front wall side opposing surface 31 and the back wall side opposing surface 32 of the spacer member 30. Therefore, in the region T and the region B, the front wall 50F and the back wall 50R are fixed to the spacer member 30, respectively. Such fixation is also realized in the end region in the left-right direction of FIG. 3A. That is, in the present embodiment, the front wall side exposed region that is not covered by the front wall side plate-like member 40F is the portion of the front wall side facing surface 31 of the spacer member 30 where the convex portion 33 is formed, It is an area including the inner areas T and B. In addition, the back wall side exposed area not covered by the back wall side plate-like member 40R is a part of the back wall side facing surface 32 of the spacer member 30 where the convex portion 33 is formed, and the areas T, A region including B.

  And the structure 70 is obtained by taking out a molded object from the 1st and 2nd metal mold | die 21 and 22, and removing the burr | flash 28. FIG.

  As described above, in the present embodiment, the first and second resin sheets 23a and 23b are suspended between the first and second molds 21 and 22 in the hanging process, and the insert member 60 is disposed in the inserting process. Since the structure 70 can be molded by fixing the first and second molds 21 and 22 to the first or second resin sheets 23a and 23b and clamping the first and second molds 21 and 22 in the mold clamping process, the manufacturing becomes easy. Moreover, it can contribute to weight reduction by using the front wall side plate-shaped member 40F and the back wall side plate-shaped member 40R as a reinforcement member compared with the case where H-section steel is used.

<Modification 1>
Next, Modification 1 of the embodiment will be described with reference to FIG. As shown in FIG. 15, the plate-like member 40 may be provided with slits 42. In this case, the spacer member 30 is preferably provided with a convex portion having a shape corresponding to the slit 42. In the first modification, the front wall 50 </ b> F and the back wall 50 </ b> R and the spacer member 30 are fixed through the slit 42.

<Modification 2>
As shown in FIG. 16, a punching pin 43 may be provided on the plate-like member 40 and the punching pin 43 may be inserted into the spacer member 30. Thereby, the plate-like member 40 can be fixed to the spacer member 30. In this case, the spacer member 30 is preferably provided with a convex portion having a shape corresponding to the hole 44 formed by the punching pin 43. In the second modification, the front wall 50F and the back wall 50R and the spacer member 30 are fixed through the holes 44.

<Modification 3>
As shown in FIGS. 17 and 18, a plate-like member 40 in which the opening 41 or the slit 42 is not provided can be used. In this case, the area of the plate-like member 40 is made smaller than the areas of the back wall side facing surface 32 and the back wall side facing surface 32 of the spacer member 30. Thereby, in the regions T and B, the front wall 50F and the back wall 50R and the spacer member 30 are fixed. Such fixation is also realized in the end region in the left-right direction of FIG. 3A.

<Others>
The present invention can also be implemented in the following modes.
The height of the convex portion 33 of the spacer member 30 is made larger than the thickness of the plate-like member 40. Thereby, it becomes difficult for the plate-shaped member 40 to come off from the spacer member 30, and the stability of the insert member 60 is improved.
The spacer member 30 and the plate-like member 40 are bonded with a special adhesive.
-Adhere the front wall 50F and the back wall 50R and the spacer member 30 with an adhesive.
The plate-like member 40 is formed of a heat resistant plastic (polyimide, polybutylene terephthalate, polypropylene, diallyl phthalate, etc.).
-Another member is provided between the above-mentioned members to form a structure having six or more layers.
-A structure having four or more layers is used as the insert member.

DESCRIPTION OF SYMBOLS 1: Molding machine 2: Resin supply apparatus 11: Raw material resin 11a: Molten tree seed 12: Hopper 13: Extruder 13a: Cylinder 17: Accumulator 17a: Cylinder 17b: Piston 18: T die 21: 1st metal mold | die 21b: Cavity 21c : Concave portion 21d: pinch-off portion 22: second mold 22b: cavity 22c: convex portion 22d: pinch-off portion 23a: first resin sheet 23b: second resin sheet 25: connecting tube 27: connecting tube 28: burr 30: spacer member 31: Front wall side facing surface 32: Back wall side facing surface 33: Projection 40: Plate member 40F: Front wall side plate member 40R: Back wall side plate member 41: Opening 42: Slit 43: Punching pin 44: Hole 50F: Front wall 50R: Back wall 60: Insert member 70: Structure PL: Parting line

Claims (13)

A front wall, a spacer member, a back wall, and a plate-like member are provided,
The plate-like member is disposed between at least one of the front wall and the spacer member and between the back wall and the spacer member,
The plate-like member is provided so as to cover a part of the front wall side facing surface or the back wall side facing surface of the spacer member,
The front wall and the spacer member are fixed to each other in a front wall side exposed region that is not covered by the plate member,
The back wall and the spacer member are fixed to each other in a back wall side exposed region that is not covered by the plate member. The plate member includes a front wall side plate member and a back wall side plate member,
The front wall, the front wall side plate member, the spacer member, the back wall side plate member, and the back wall in this order,
The front wall side plate-like member is provided so as to cover a part of the surface facing the front wall side of the spacer member,
The front wall and the spacer member are fixed to each other in a front wall side exposed region that is not covered by the front wall side plate member,
The back wall side plate-like member is provided so as to cover a part of the back wall side facing surface of the spacer member,
The structure according to claim 1, wherein the back wall and the spacer member are fixed to each other in a back wall side exposed region that is not covered by the back wall side plate member.   The area of the area | region prescribed | regulated by the outer periphery of the said plate-shaped member is 1/3 or more of the area of the front wall side opposing surface or back wall side opposing surface of the said spacer member of Claim 1 or Claim 2 characterized by the above-mentioned. Structure.   The thickness of the said plate-shaped member is a structure as described in any one of Claims 1-3 which is 1/10 or less of the thickness of the said spacer member. The spacer member has a convex portion in the front wall side exposed region and the back wall side exposed region,
The front wall and the spacer member are fixed at the convex portion,
The said back wall and the said spacer member are structures in any one of Claims 2-4 fixed in the said convex part.   The structure according to claim 5, wherein the plate-like member has an opening, and the convex portion is provided at a position corresponding to the opening.   The structure according to claim 5, wherein the plate-like member has a plurality of openings, and the convex portion is provided at a position corresponding to each of the plurality of openings.   The structure according to claim 6 or 7, wherein the opening of the front wall side plate-like member and the opening of the back wall side plate-like member are provided at positions facing each other.   The structure according to any one of claims 6 to 8, wherein the opening and the convex have substantially the same planar shape.   The structure according to any one of claims 1 to 8, wherein the heat resistance temperature of the plate-like member is higher than the heat resistance temperature of the spacer member.   The said spacer member is a structure as described in any one of Claims 1-10 which is a foam.   The said plate-shaped member is a structure as described in any one of Claims 1-11 which is a metal plate. It has a drooping process, an insert process, and a mold clamping process.
In the hanging step, the first and second resin sheets are suspended between the first and second molds,
In the insert step, the insert member is fixed to the first or second resin sheet,
In the mold clamping step, the first and second molds are clamped,
The said insert member is a manufacturing method of a structure comprised with a spacer member pinched | interposed by a front wall side plate-shaped member and a back wall side plate-shaped member.