Door structure

Abstract

To provide a door structure that enables weight reduction, thin-walled construction, and low cost, by covering core materials and connecting members with two soft materials, thereby allowing the soft materials to be bonded together robustly and without gaps, without creating a gap between the connecting members and the soft materials.SOLUTION: A door structure 1 constructed spanning from one side to the other includes a flexible core material 3, a connecting member 4 connecting a core material to a movable axis, and two soft materials 5a and 5b covering the core material and the connecting member from both sides. Both soft materials have adhesive sections 7 positioned to avoid the core material, enabling adhesion between the soft materials. One soft material 5a has a single slit section 8 extending in a direction traversing one side of the door structure and configured to penetrate the one soft material, continuously surrounding at least a portion of the connecting member.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] FIELD An embodiment of the present invention relates to a door structure. [Background technology]

[0002] Conventionally, in various gate systems, including automatic ticket gates, a flap-type or slide-type door structure, for example, has been used as a means for regulating the flow of people and goods along a predetermined route. A flap-type door structure is rotatably supported on a rotating shaft and swings between a position that opens the route and a position that closes it. A slide-type door structure is slidably supported on a slide shaft and moves in parallel between a position that opens the route and a position that closes it.

[0003] Each door structure is comprised of a flexible core, a connecting member for connecting the core to a movable shaft such as the rotating shaft or sliding shaft, and three soft sponge materials for covering the core and connecting member. One soft material is placed as an intermediate layer to surround the outside of the core and is set to the same thickness as the core. The remaining two soft materials are placed on either side of the core and are adhered to both sides of the intermediate layer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-041826 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-307145 [Patent Document 3] Utility Model Registration No. 3029739 Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, there has been a demand for lighter, thinner, and less expensive door structures. One possible solution to this demand is to make the core thinner, eliminate the soft material in the middle layer, and cover the core and connecting members from both sides with the remaining two soft materials.

[0006] However, while the method of covering the core material and connecting member with two soft materials can achieve a lighter, thinner, and less expensive door structure, gaps (floating) occur between the uneven connecting member and the soft material, making it difficult to firmly bond the soft materials together without any gaps.

[0007] In this case, depending on the magnitude of the external force when a person or object comes into contact with the door structure, it may become difficult to maintain a constant adhesion state between the soft materials, and as a result, for example, the soft materials may peel off from each other, and depending on the degree of peeling of the soft materials, the door structure may even come apart.

[0008] The object of the present invention is to provide a door structure that can be made lighter, thinner, and less expensive, and that can firmly bond the soft materials together without any gaps by covering the core material and connecting member with two soft materials, without creating any gaps (floating) between the connecting member and the soft materials. [Means for solving the problem]

[0009] According to an embodiment, the door structure is constructed from one side to the other to open or close a specified path, and comprises a flexible core material constructed along one side to the other, a connecting member fixed to one side of the core material for connecting the core material to a specified movable axis, and two soft materials for covering the core material and the connecting member from both sides, both of which have adhesive portions that can bond the soft materials to each other at a position that avoids the core material, and one of the soft materials has a slit that extends in a direction across one side of the door structure and penetrates one of the soft materials so as to continuously surround at least a portion of the connecting member. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of an automatic ticket gate to which a door structure according to an embodiment is applied; [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 1 is a perspective view of a door structure in a state where an external force is applied. [Figure 5] FIG. 4 is a top view of the door structure when an external force is applied. [Figure 6] FIG. 10 is a plan view of a door structure according to a first modified example. [Figure 7] FIG. 10 is a plan view of a door structure according to a second modified example. [Figure 8] FIG. 11 is a plan view of a door structure according to a third modified example. DETAILED DESCRIPTION OF THE INVENTION

[0011] "One embodiment" Fig. 1 is a diagram showing the application configuration of a door structure according to this embodiment. Door structures are used in various gate systems, including automatic ticket gates, as a means for restricting the flow of people and objects along a predetermined route. Restriction methods include, for example, a flap type or a slide type.

[0012] Flap-type door structures are rotatably supported on a rotating shaft and swing between a position that opens and a position that closes the path. On the other hand, slide-type door structures are slidably supported on a sliding shaft and move in parallel between a position that opens and a position that closes the path. Both door structures are connected to various gate systems, including automatic ticket gates, via movable shafts such as rotating shafts and sliding shafts.

[0013] As an example, Fig. 1 shows an automatic ticket gate 2 equipped with a flap-type door structure 1. The automatic ticket gate 2 is installed at the ticket gate of a railway station (i.e., the path along which people pass), reads data on tickets or IC cards purchased by people, and determines whether or not the person is permitted to enter the station premises and whether or not the person is permitted to exit the station.

[0014] As shown in Fig. 1, the door structure 1 is supported via the above-mentioned movable shaft (not shown) so as to be able to swing relative to the automatic ticket gate 2. For example, when permitting entry into the station premises and exiting the station, the door structure 1 is stored in the automatic ticket gate 2 and positioned to open the path (see the door structure 1 in the foreground in Fig. 1).

[0015] On the other hand, when entry into the station premises and exit from the station are not permitted, the door structure 1 is deployed from the automatic ticket gate 2 and positioned to close the route (see the door structure 1 at the back of Figure 1). This restricts the flow of passengers getting on and off through the ticket gate.

[0016] This type of door structure 1 is connected to the automatic ticket gate 2 so that when it is unfolded from the automatic ticket gate 2 upon entry or exit, one of the soft materials 5a, which has a slit 8 described later, faces directly towards the passengers getting on and off.

[0017] Fig. 2 is a plan view of the door structure 1 shown in Fig. 1. Fig. 3 is an exploded view of the door structure 1 shown in Fig. 2. The areas shaded with dotted lines in Fig. 2 and the areas shaded with solid lines in Fig. 3 do not represent cross sections, but rather indicate the area (range) of an adhesive portion 7, which will be described later.

[0018] 2 and 3, the door structure 1 is constructed from one side to the other and includes a core material 3, a connecting member 4, and two soft materials 5a and 5b, and is entirely covered with a transparent decorative cover (not shown). The contour shape of the door structure 1 can be arbitrarily set depending on the application and usage environment of the door structure 1, for example, rectangular, elliptical, arc-shaped, triangular, trapezoidal, etc.

[0019] 2 and 3 show an example of a rectangular door structure 1. The door structure 1 is composed of a one-side outer edge portion 1t extending straight along one side, and a side outer edge portion 1s extending straight from one side to the other. The side outer edge portions 1s are provided continuously on both sides of the one-side outer edge portion 1t and extend parallel to each other.

[0020] The core material 3 is configured along one side of the door structure 1. The contour shape of the core material 3 can be set to correspond to the contour shape of the door structure 1, for example, a rectangular shape, an elliptical shape, an arc shape, a triangular shape, a trapezoidal shape, or the like.

[0021] The contour shape of one side of the core material 3 is composed of a transverse contour portion 3t and a side edge contour portion 3s. The transverse contour portion 3t extends in a direction transverse to one side of the door structure 1. The side edge contour portions 3s are provided continuously on both sides of the transverse contour portion 3t, and extend along from one side of the door structure 1 to the other.

[0022] 2 and 3 show, as an example, a rectangular core 3. On one side, a transverse contour 3t of the core 3 extends parallel to one side outer edge 1t of the door structure 1. From one side to the other, side edge contours 3s of the core 3 extend parallel to each other and to the lateral outer edge 1s of the door structure 1.

[0023] The core material 3 can be made of a thermoplastic resin such as polycarbonate. This allows the core material 3 to have excellent flexibility, impact resistance, and water resistance. The thickness of the core material 3 is not particularly limited here, as it is set depending on the application and usage environment of the door structure 1.

[0024] The connecting member 4 is fixed to one side of the core material 3 and connects the core material 3 to the movable shaft (not shown). The connecting member 4 is integrally configured to include a fixing portion 4a and a connecting portion 4b. The contour shape of the connecting member 4 can be set to correspond to the contour shape of the core material 3, for example, a rectangular shape, an elliptical shape, an arc shape, a triangular shape, a trapezoidal shape, or the like.

[0025] 2 and 3 show a rectangular connecting member 4 as an example. In this case, by fixing the fixing portion 4a to the core material 3 and connecting the connecting portion 4b to a movable shaft (not shown), the core material 3 can be connected to the automatic ticket gate 2 via the connecting member 4. Methods for fixing the core material 3 and the connecting member 4 (i.e., the fixing portion 4a) can be, for example, a method of fastening the connecting member 4 (fixing portion 4a) to the core material 3 with screws or bolts, or a method of adhering the connecting member 4 (fixing portion 4a) to the core material 3 with an adhesive. In FIGS. 2 and 3, as an example, the connecting member 4 (fixing portion 4a) and the core material 3 are fixed with a plurality of screws 6.

[0026] In either fixing method, it is preferable to position the connecting member 4 so that it overlaps the center portion of one side of the core material 3, i.e., the portion that bisects the transverse contour portion 3t of the core material 3. In this way, when the core material 3 is connected to the movable shaft (not shown) via the connecting member 4, the core material 3 is firmly supported in a well-balanced manner by the connecting member 4. As a result, when the door structure 1 swings, the core material 3 is always maintained in a constant posture.

[0027] The connecting member 4 can be made of, for example, steel, which is a type of metallic material. This allows for a connecting member 4 with excellent strength and toughness. The thickness of the connecting member 4 is not particularly limited here, as it is set depending on the application and usage environment of the door structure 1.

[0028] The two soft materials 5a, 5b are configured to be able to cover both sides of the core material 3 and the connecting member 4. Both soft materials 5a, 5b have the same contour shape and thickness, and are set to be larger (wider) than the core material 3. The contour shape of each soft material 5a, 5b can be set according to the contour shape of the core material 3, for example, rectangular, elliptical, arc-shaped, triangular, trapezoidal, or the like.

[0029] 2 and 3 show rectangular soft materials 5a and 5b as an example. These two soft materials 5a and 5b are each provided with an adhesive portion 7 at a position avoiding the core material 3, which can bond the soft materials 5a and 5b to each other.

[0030] The positions that avoid the core material 3 are set in the respective soft materials 5a, 5b at portions (corresponding to the hatched portions in Figures 2 and 3) that protrude more (wider) than the core material 3. The protruding portions extend continuously without interruption along the peripheries of both soft materials 5a, 5b so as to continuously surround the periphery of the core material 3.

[0031] Both protruding portions are configured to continuously surround the periphery of the core material 3 as the above-mentioned adhesive portion 7. In this configuration, an adhesive material is disposed in both adhesive portions 7 or in one of the adhesive portions 7. As the adhesive material, for example, a commercially available adhesive such as double-sided tape or adhesive agent can be applied.

[0032] 2 and 3, as an example, double-sided tape (not shown) is placed on one of the adhesive portions 7 (corresponding to the hatched portion in FIGS. 2 and 3). One of the adhesive portions 7 is formed on the other of the two soft materials 5a, 5b, namely, the soft material 5b, which does not have a slit portion 8, which will be described later.

[0033] Here, the core material 3 to which the connecting member 4 is fixed is placed at the center, and one soft material 5a, 5b is placed on each side of it in parallel. At this time, the protruding portions of the soft materials 5a, 5b (i.e., adhesive portions 7) are positioned facing each other. Then, while the soft materials 5a, 5b are tightly attached to both sides of the core material 3, the adhesive portions 7 are brought into contact with each other without any gaps and overlapped. As a result, the soft materials 5a, 5b are adhered to each other with double-sided tape (not shown). As a result, a single door structure 1 is realized in which the core material 3 and connecting member 4 are covered with the two soft materials 5a, 5b.

[0034] The soft materials 5a and 5b are made of, for example, a foam (i.e., polyethylene foam) mainly made of low-density polyethylene, which provides them with excellent heat insulation and pressure resistance. The thickness of the soft materials 5a and 5b is not particularly limited here, as it is set depending on the application and usage environment of the door structure 1.

[0035] However, when the core material 3 and the connecting member 4 are covered with the two soft materials 5a, 5b, there is a risk of a gap (floating) occurring between the connecting member 4 and the soft materials 5a, 5b. To address this issue, the door structure 1 of this embodiment is provided with one slit 8. The slit 8 is configured to penetrate one of the two soft materials 5a, 5b, the soft material 5a. In one of the soft materials 5a, the slit 8 extends in a direction transverse to one side of the door structure 1 so as to continuously surround at least a portion of the connecting member 4.

[0036] 2 and 3, the slits 8 are set along the contour of one side of the core material 3 in the contour shape of the core material 3 that extends from one side to the other. The slits 8 are made up of a first slit 8a and a second slit 8b.

[0037] The first slit 8a extends in a direction transverse to one side of the door structure 1. The first slit 8a extends parallel to the transverse contour 3t of the core material 3. In Figs. 2 and 3, as an example, the first slit 8a extends along a position that coincides with the transverse contour 3t of the core material 3 (in other words, so as to overlap with the transverse contour 3t of the core material 3).

[0038] The second cutouts 8b are provided continuously on both sides of the first cutout 8a and bent and extend in a different direction from the first cutout 8a. In this case, the two second cutouts 8b may extend in the same direction from both sides of the first cutout 8a, or may extend in different directions (for example, one second cutout 8b may extend in the opposite direction by 180° from the other second cutout 8b).

[0039] 2 and 3, as an example, the two second cutouts 8b extend in the same direction from both sides of the first cutout 8a. The two second cutouts 8b face each other in parallel and extend parallel to the side edge contour 3s of the core material 3. That is, the two second cutouts 8b extend along positions that coincide with the side edge contour 3s of the core material 3 (in other words, so as to overlap with the side edge contour 3s of the core material 3). Furthermore, these second cutouts 8b are set to be the same length.

[0040] Here, focusing on the area of one soft material 5a surrounded by the slits 8 (first slit 8a, second slit 8b), a variable region 9 is formed in this area. The variable region 9 is made up of a continuous region 9a and a discontinuous region 9b. The discontinuous region 9b is configured to be displaceable (rotatable) around the continuous region 9a.

[0041] The continuous region 9a is formed between the non-continuous region 9b and one of the soft materials 5a, and is continuous with one of the soft materials 5a. The non-continuous region 9b is formed in a region surrounded by the first cut portion 8a and the second cut portions 8b on both sides of the first cut portion 8a, and is not continuous with one of the soft materials 5a.

[0042] 4 and 5 are diagrams illustrating the behavior characteristics of the notch 8. As an example, in Figures 4 and 5, a case is assumed in which entry into the station premises and exit from the station are not permitted, in which case the door structure 1 is deployed from the automatic ticket gate 2 and positioned to close the route. At this time, one soft material 5a of the door structure 1, where the notch 8 is provided, is positioned directly facing the passengers getting on and off.

[0043] As shown in Figures 4 and 5, when a passenger comes into contact with the door structure 1 deployed in the route closed position, an external force corresponding to the contact force acts on the door structure 1. This causes the core material 3, together with both soft materials 5a, 5b, to elastically deform around the connecting member 4. In this state, depending on the amount of elastic deformation of the core material 3, the variable region 9 (continuous region 9a, discontinuous region 9b) in one of the soft materials 5a surrounded by the slit portion 8 is displaced in the direction opposite to the elastic deformation direction of the core material 3. In other words, the discontinuous region 9b is displaced (pivoted) around the continuous region 9a.

[0044] At this time, the discontinuous region 9b is displaced (pivoted), so that no external force is applied to the adhesive portion 7 (the portion where the soft materials 5a, 5b are adhered to each other). In other words, stress is prevented from occurring in the adhesive portion 7. As a result, the adhesive state between the soft materials 5a, 5b is maintained constant, and the soft materials 5a, 5b are prevented from peeling off from each other.

[0045] As described above, according to this embodiment, one slit 8 is provided, penetrating one of the soft materials 5a. In this case, when the core material 3 and the connecting member 4 are covered from both sides with the two soft materials 5a, 5b, the area surrounded by the slit 8 (i.e., the variable region 9) elastically deforms along the uneven contour of the connecting member 4. In this state, no gap (floating) is generated between the uneven connecting member 4 and the soft materials 5a, 5b, and the soft materials 5a, 5b can be firmly bonded together without any gaps at the adhesive joint 7. This maintains a constant adhesive state between the soft materials 5a, 5b. As a result, it is possible to prevent the soft materials 5a, 5b from peeling from each other, and, depending on the degree of peeling of the soft materials 5a, 5b, prevent the door structure 1 from coming apart.

[0046] According to this embodiment, when an external force acts on the door structure 1, the variable region 9 (i.e., the discontinuous region 9b) surrounded by the slits 8 is displaced in the direction opposite to the elastic deformation direction of the core material 3, depending on the amount of elastic deformation of the core material 3. In this case, the displacement of the variable region 9 (discontinuous region 9b) prevents the external force from being applied to the adhesive region 7 (the area where the soft materials 5a, 5b are bonded to each other). This state prevents stress from being generated in the adhesive region 7. This maintains a constant adhesive state between the soft materials 5a, 5b. As a result, it is possible to prevent the soft materials 5a, 5b from peeling from each other, and further, depending on the degree of peeling of the soft materials 5a, 5b, it is possible to prevent the door structure 1 from coming apart.

[0047] According to this embodiment, the intermediate layer, which was a necessary component in the past, is eliminated, the core material 3 is made thinner, and the core material 3 and the connecting member 4 are covered on both sides with two soft materials 5a, 5b. This makes it possible to realize a lighter and thinner door structure 1 with fewer components than conventional products. As a result, it is possible to simultaneously achieve lighter, thinner, and less expensive door structure 1.

[0048] According to this embodiment, the connecting member 4 is arranged so as to overlap the bisecting portion of the transverse contour portion 3t of the core material 3. As a result, when the core material 3 is connected to the movable shaft (not shown) via the connecting member 4, the core material 3 is firmly supported in a well-balanced manner by the connecting member 4. As a result, when the door structure 1 swings, the core material 3 can always be maintained in a constant posture.

[0049] "First Variation" 6 is a plan view of the door structure 1 according to a first modified example. In the door structure 1 of this modified example, the notch 8 extends so as to continuously surround a part of the connecting member 4. The notch 8 is composed of a first notch 8a and a second notch 8b.

[0050] 6, the first slit 8a extends along a position that coincides with the transverse contour 3t of the core material 3 (in other words, so as to overlap with the transverse contour 3t of the core material 3), and also extends across the connecting member 4. The entire length of the first slit 8a is set to coincide with the entire width of the connecting member 4.

[0051] The second cutouts 8b are provided continuously on both sides of the first cutout 8a and extend in the same direction. The two second cutouts 8b extend parallel to and face each other along both side edges of the connecting member 4. Both second cutouts 8b are set to the same length.

[0052] A variable region 9 is formed in the area of one of the soft materials 5a surrounded by the slits 8 (first slit 8a, second slit 8b). The variable region 9 is made up of a continuous region 9a and a discontinuous region 9b. The discontinuous region 9b is configured to be displaceable (rotatable) around the continuous region 9a.

[0053] The continuous region 9a is formed between the non-continuous region 9b and one of the soft materials 5a, and is continuous with one of the soft materials 5a. The non-continuous region 9b is formed in a region surrounded by the first cut portion 8a and the second cut portions 8b on both sides of the first cut portion 8a, and is not continuous with one of the soft materials 5a.

[0054] As described above, according to this modification, the cutouts 8 (first cutouts 8a, second cutouts 8b) need only be configured to the minimum extent necessary. This minimizes the labor required for manufacturing. Note that the other configurations and effects are the same as those of the above-described embodiment, and therefore a description thereof will be omitted.

[0055] "Second Variant" 7 is a plan view of a door structure 1 according to a second modified example. In the door structure 1 of this modified example, the notch 8 extends in the opposite direction by 180° from that of the first modified example, so as to continuously surround a part of the connecting member 4. The notch 8 is composed of a first notch 8a and a second notch 8b.

[0056] 7, the first cutout 8a extends along a position coinciding with the outer edge of the fixing portion 4a of the connecting member 4 (in other words, so as to overlap with the outer edge of the fixing portion 4a of the connecting member 4). The entire length of the first cutout 8a is set to approximately match the entire width of the connecting member 4.

[0057] The second cutouts 8b are provided continuously on both sides of the first cutout 8a and extend in the same direction. The two second cutouts 8b extend parallel to and face each other along both side edges of the connecting member 4. Both second cutouts 8b are set to the same length.

[0058] The configuration and effects of this modified example are the same as those of the first modified example described above, and other configurations and effects are the same as those of the embodiment described above, so a description thereof will be omitted.

[0059] "Third Variation" 8 is a plan view of the door structure 1 according to a third modified example. In the door structure 1 of this modified example, the slit 8 is set larger than that in the above-described embodiment and is provided along the portion of one soft material 5a between the door structure 1 and the core material 3. The slit 8 is made up of a first slit 8a and a second slit 8b.

[0060] As shown in FIG. 8 , in one of the soft materials 5a, the first slit 8a extends parallel to the transverse contour 3t of the core material 3, along the gap between the one-side outer edge 1t of the door structure 1 and the transverse contour 3t of the core material 3. The second slit 8b is provided continuously on both sides of the first slit 8a and extends parallel to the transverse contour 3s of the core material 3, along the gap between the lateral outer edge 1s of the door structure 1 and the transverse contour 3s of the core material 3. In this case, it is preferable that no adhesive portion 7 is present between the slit 8 and the core material 3 (the transverse contour 3t, the transverse contour 3s). As a result, when an external force is applied to the door structure 1, the variable region 9 (i.e., the discontinuous region 9b) surrounded by the slit 8 is displaced in the direction opposite to the elastic deformation of the core material 3, depending on the amount of elastic deformation of the core material 3. The other configurations and effects are similar to those of the above-described embodiment, and therefore, description thereof will be omitted.

[0061] "Other Modifications" In the above-described embodiment, it is assumed that the adhesive portion 7 is provided at a position that avoids the core material 3 (in other words, at a position that does not overlap the core material 3), but this is not limited to this, and the adhesive portion 7 may overlap the core material 3 to some extent as long as the effects of the above-described embodiment can be achieved. In the above embodiment, the description was given assuming that the connecting member 4 is smaller than the core material 3, but it is also possible that the connecting member 4 is larger than the core material 3. In this case, the slit portion 8 may be configured to penetrate one of the soft materials 5a so as to continuously surround at least a portion of the core material 3.

[0062] Although one embodiment of the present invention and several modifications thereof have been described above, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These embodiments and modifications may be embodied in various other forms, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. These embodiments and modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as defined in the claims. [Explanation of symbols]

[0063] 1...door structure, 1t...one side outer edge, 1s...side outer edge, 2...automatic ticket gate, 3...core material, 3t...transverse contour portion, 3s...side edge contour portion, 4...connecting member, 4a...fixing portion, 4b...connecting portion, 5a...one soft material, 5b...other soft material, 6...screw, 7...adhesive portion, 8...slit portion, 8a...first slit portion, 8b...second slit portion, 9...variable region, 9a...continuous region, 9b...discontinuous region.

Claims

1. A door structure constructed from one side to the other to open or close a predetermined path, a flexible core material configured along the one side and the other side; a connecting member fixed to the one side of the core material for connecting the core material to a predetermined movable shaft; two soft materials for covering the core material and the connecting member from both sides; Both of the soft materials are provided with adhesive portions at positions avoiding the core material, which can bond the soft materials together, A door structure in which one of the soft materials has a slit extending across the one side of the door structure and penetrating the soft material so as to continuously surround at least a portion of the connecting member.

2. The door structure according to claim 1 , wherein the notch is set along the contour of the one side of the core material in the contour shape of the core material that is configured from the one side to the other side.

3. The cutout portion is a first notch extending in a direction transverse to the one side of the door structure; 3. The door structure according to claim 2, further comprising: second slits provided continuously on both sides of the first slit and bending and extending in a direction different from that of the first slit.

4. The contour shape of the one side of the core material is a transverse profile extending transversely across the one side of the door structure; a side edge profile portion provided contiguous to both sides of the transverse profile portion and extending along the one side of the door structure from the other side; the first cutout extends parallel to the transverse profile; The door structure according to claim 3 , wherein the second notches on both sides of the first notch extend parallel to the side edge contours.

5. The door structure according to claim 3 , wherein the second slits on both sides of the first slit are set to the same length.

6. 4. The door structure according to claim 3, wherein when an external force acts on the door structure, in a state in which the core material is elastically deformed around the connecting member, the variable region of one of the soft materials surrounded by the notch portion displaces in a direction opposite to the elastic deformation direction of the core material according to the amount of elastic deformation of the core material, thereby maintaining a constant adhesive state between the soft materials.

7. The variable region is a continuous region continuous with one of the soft materials; a discontinuous region that is not continuous with one of the soft materials, The door structure according to claim 6, wherein the discontinuous region is configured to be displaceable around the continuous region.

8. the continuous region is configured between the non-continuous region and one of the soft materials, The door structure according to claim 7, wherein the discontinuous region is defined as a region surrounded by the first cutout and the second cutouts on both sides of the first cutout.

9. The two soft materials are set to be larger than the core material, the position avoiding the core material is set to a portion that protrudes beyond the core material, The door structure according to claim 1 , wherein the protruding portion extends continuously along the peripheries of the two soft materials so as to continuously surround the periphery of the core material.

10. The door structure according to claim 4, wherein the connecting member is disposed so as to overlap a portion that bisects the transverse profile portion of the core material.

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