Seat frame, seat for mobile device and mobile device

Abstract

To provide a seat frame which can enhance resistance against a load applied to a resin side frame in a front-and-rear direction by reinforcements.SOLUTION: There is provided a seat frame for a movable body in which reinforcements are mounted on a resin side frame included in a seat back frame, wherein the reinforcement has a plate-shaped body part, a pair of flange parts provided on both front and back ends of the one surface of the body part, and projections provided on the other surface of the body part, and in the two reinforcements, the projections are joined to each other, and a resin constituting the side frame is inserted and joined to the side frame, in the periphery of the projections.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a seat frame, a seat for a moving body, and a moving body.

Background Art

[0002] A seat for a moving body such as an automobile has a structure in which a seat back and a seat cushion are respectively attached to a seat back frame on the back portion of the seat frame and a cushion frame on the seat portion. The seat back frame has a structure in which side frames provided on both the left and right sides are connected by an upper frame at the upper end portion.

[0003] In order to suppress deformation of the seat frame due to the load applied to the seat, a configuration in which reinforcement is disposed on the side frame is known (for example, Patent Documents 1 and 2). Patent Documents 1 and 2 describe reinforcement for a side frame having a flat plate-shaped main body portion disposed on the side surface of the side frame and a flange portion bent so as to be disposed along the entire surface of the side frame.

[0004] The side frame has conventionally been made of a metal such as steel. On the other hand, in recent years, resin side frames for the purpose of weight reduction of moving bodies have also been studied (for example, Patent Documents 3 and 4). Since resin has lower strength than metal, when adopting a resin side frame, improvement in impact resistance is required. In Patent Documents 3 and 4, brackets for joining the side frame to other members are made easily breakable so as to absorb the energy at the time of collision by the brackets. [[ID=二十一]] [[ID=二十二]]

Prior Art Documents

Patent Documents

[0005] [[ID=二十九]] [[ID=三十]] [[ID=三十一]]

Patent Document 1

Patent Document 2

[0006] As mentioned above, the resin side frame needs to be strengthened. In contrast, the configuration described in Patent Documents 3 and 4, which absorbs collision energy by the failure of brackets, can suppress deformation of the side frame, but on the other hand, the failure of the brackets causes the seat itself to deform, so it cannot be said to be a safe configuration for the occupant.

[0007] In contrast, if the deformation of the side frame is suppressed by the arrangement of the reinforcement, there is no need to make the bracket more prone to failure. However, if a flange portion is provided on the reinforcement as described in Patent Documents 1 and 2 in order to increase resistance to loads applied to the side frame in the front-rear direction, stress is applied from the flange portion to the side frame in the front-rear direction, which actually concentrates stress on the side frame and makes it more prone to deformation.

[0008] The present invention has been made in view of these problems, and aims to provide a seat frame that can increase the resistance to loads applied in the front-rear direction to a resin side frame by reinforcement, a seat for a mobile body having the seat for a mobile body, and a mobile body having the seat for a mobile body. [Means for solving the problem]

[0009] One aspect of the present invention for solving the above problems relates to the following seat frames [1] to [3]. [1] A seat frame for a mobile vehicle, wherein a reinforcement is attached to a resin side frame of the seat back frame, The aforementioned reinforcement is, A flat main body, A pair of flange portions are provided at both the front and rear ends of one side of the main body, The main body has a protrusion provided on the other side of the main body, The two reinforcements are joined together at their protrusions, and the resin constituting the side frame is inserted around the protrusions and joined to the side frame. Seat frame. [2] The two reinforcements are welded together at the protrusions, [1] The seat frame described above. [3] The two reinforcements are arranged such that the flange portion is exposed to the outside of the side frame. The seat frame described in [1] or [2].

[0010] Another aspect of the present invention for solving the above problems relates to the following [4] to [6] seats for mobile bodies and mobile bodies. A seat for a mobile device having a seat frame as described in any of [4][1] to [3]. A mobile body having the mobile body sheet described in [5][4]. [6] The mobile vehicle described in [5], which is an automobile. [Effects of the Invention]

[0011] According to the present invention, a seat frame can be reinforced to increase the resistance of a resin side frame to a load applied in the front-rear direction, a seat for a mobile body having the seat frame, and a mobile body having the seat for the mobile body are provided. [Brief explanation of the drawing]

[0012] [Figure 1]FIG. 1 is a schematic perspective view showing a general overall configuration of a seat frame for a moving body. [Figure 2] FIG. 2 is a schematic perspective view showing an overall configuration of a seat frame for a moving body according to an embodiment of the present invention. [Figure 3] FIGS. 3A and 3B are schematic views showing a configuration of a reinforcement. [Figure 4] FIG. 4 is a schematic view showing a configuration when two reinforcements 230a and 230b are arranged in contact with each other. [Figure 5] FIG. 5 is a schematic view showing a cross-sectional configuration when the reinforcements 230a and 230b are cut along the dash-dotted line 5-5 shown in FIG. 4. [Figure 6] FIG. 6 is a schematic view showing a moving body having a seat for a moving body. MODE FOR CARRYING OUT THE INVENTION

[0013] [First Embodiment] FIG. 1 is a schematic perspective view showing a general overall configuration of a seat frame for a moving body. The seat frame 100 has a seat back frame 110 on which a seat back is disposed and a cushion frame 120 on which a seat cushion is disposed. In this specification, the forward direction of the moving body is defined as the X direction, the right direction as the Y direction, and the upward direction as the Z direction.

[0014] The seat back frame 110 has a pair of side frames 112 extending in the vertical direction disposed at both left and right ends, and an upper frame 114 connecting upper end portions of these side frames. Further, the seat back frame 110 has one or a plurality (two in FIG. 1) of width direction springs 118 disposed at a height between the cushion frame 120 and the upper frame 114 so as to span the pair of side frames 112.

[0015] Each of the pair of side frames 112 has a reinforcement 130 that extends upward along the side frame from the connection point with the cushion frame 120 at its lower end. Each of these reinforcements 130 has a flat main body portion 132 and a front-to-back symmetrical, substantially trapezoidal extension portion 134 that extends from the main body portion 132 upward toward the side frame 112, and only one reinforcement 130 is provided on each side frame 112.

[0016] The cushion frame 120 has a pair of side frames 122 that extend in the front-to-back direction and are located at both the left and right ends, and a front frame 124 and a back frame 126 that connect these side frames at the front and rear, respectively. The cushion frame 120 also has one or more (four in Figure 1) front-to-back springs 128 that are positioned to bridge the front frame 124 and the upper frame 114 between the pair of side frames 122.

[0017] Furthermore, the cushion frame 120 can be positioned in the front-to-back direction by a pair of left and right sliding rails 140.

[0018] In this embodiment, the seat back frame 110 is made of resin (particularly fiber-reinforced resin), and the cushion frame 120 is made of metal (steel).

[0019] Figure 2 is a schematic perspective view showing the overall configuration of a sheet frame 200 for a mobile seat according to one embodiment of the present invention. Components common to the general sheet frame 100 shown in Figure 1 are denoted by the same reference numerals, and redundant explanations are omitted.

[0020] In this embodiment, each of the pair of side frames 112 of the seat back frame 110 has a reinforcement 230 that extends upward along the respective side frame from the connection point with the cushion frame 120, which is the lower end of the side frame. Each reinforcement 230 has the same shape and configuration. Each reinforcement 230 has a configuration in which two reinforcements 230a and 230b of the same shape are arranged back-to-back in contact with each other.

[0021] Figure 3A is a schematic diagram showing the configuration of reinforcement 230b, Figure 3B is a schematic diagram showing the configuration of reinforcement 230a, and Figure 4 is a schematic diagram showing the configuration when reinforcement 230a and reinforcement 230b are placed in contact with each other. Figure 5 is a schematic diagram showing the cross-sectional configuration when reinforcement 230a and reinforcement 230b are cut along the dashed line 5-5 shown in Figure 4.

[0022] The reinforcement 230a has a flat main body portion 232 and flange portions 236 formed at the front and rear ends of the main body portion, extending perpendicularly to the main body portion 232 in one direction (the Y direction and the opposite direction). Both flange portions 236 are formed from the lower end to the upper end of the main body portion 232.

[0023] The main body portion 232 has a shape that is substantially the same as the lower end region of the side frame 112 when viewed from above (in the Y direction). The front and rear ends of the main body portion 232 (ends in the X direction and the opposite direction) are aligned with the front and rear ends of the side frame 112 (ends in the X direction and the opposite direction) and are positioned in close contact with the lower end region of the side frame 112.

[0024] A protrusion 238 is formed in the center of the main body portion 232, projecting in the opposite direction to the flange portion 236. In this embodiment, the flange portion 236 and the protrusion 238 are formed by press-forming a single metal plate that constitutes the flange portion 236, with the flange portion 236 being bent and the protrusion 238 being drawn.

[0025] The two reinforcements 230a and 230b are joined by spot welding after their protrusions 238 are bonded together with adhesive, and the remaining main body portion 232 is joined by insert molding of the resin that constitutes the side frame 112. Figure 5 shows how the main body portion 232 is joined by the resin that constitutes the side frame 112 in the front-to-back direction (X direction and the opposite direction) of the protrusion 238, but similarly, the main body portion 232 is also joined by the resin that constitutes the side frame 112 in the up-and-down direction (Z direction and the opposite direction) of the protrusion 238.

[0026] In this configuration, the flange portions 236 of reinforcement 230a and reinforcement 230b are arranged in directions that are separated from each other. In this embodiment, the flange portions 236 are arranged to be exposed to the outside from the front-rear ends (X direction and the opposite direction) of the side frame 112.

[0027] The resin of the inserted side frame 112 fills the area 112a where the main body portions 232 of reinforcements 230a and 230b face each other, and also fills the space between the front and rear flange portions 236 in the area 112b opposite to the main body portion 232. As a result, only the flange portions 236 of reinforcements 230a and 230b are exposed to the outside, while the rest of the main body portion 232 is embedded inside the side frame 112.

[0028] The two reinforcements 230a and 230b each have two insertion holes 239a and 239b at the same location, and fasteners (bolts) are inserted through these insertion holes to fasten them to the side frame 112. In the lower insertion hole 239b, a hinge member (not shown) for rotatably assembling the side frame 112 to the cushion frame 120, or a bracket (not shown) for assembling the side frame 112 without rotation, is assembled using the same fasteners.

[0029] According to the configuration of this embodiment, the two reinforcements 230a and 230b make it possible to increase the resistance of the resin side frame 112 to loads applied in the front-rear direction (X direction and the opposite direction) compared to conventional designs. Therefore, the reinforcement 230 in this embodiment has high efficiency in absorbing loads applied to the side frame in the front-rear direction. As a result, even if the flange portions 236 at both the front and rear ends of the reinforcement 230 clamp the side frame 112 from the front-rear direction, deformation of the side frame 112 is less likely to occur due to excessive stress applied to the side frame in the front-rear direction from these flange portions 236. This allows the impact resistance improvement effect of the flange portions 236 to be achieved more efficiently.

[0030] Furthermore, the reinforcements 230a and 230b are joined at the protrusions 238 where the main bodies 232 meet, forming a reinforcement 230 with an H-shaped cross-section. This shape of the reinforcement 230 improves the second moment of area in the front-rear direction, thereby enhancing the strength-improving effect of the side frame 112. Moreover, the reinforcements 230a and 230b are arranged so that their flange portions 236 face opposite each other. This also improves the second moment of area in the front-rear direction of the entire reinforcement 230, further enhancing the strength-improving effect of the side frame 112.

[0031] Figure 6 is a schematic diagram showing a mobile body 400 having a mobile seat 410 with a seat back and seat cushion attached to the seat frame 200 described above. This mobile body 400 is lightweight because the side frames 122 of the seat frame 200 are made of resin, while the strength of the side frames 122 is also high, resulting in high occupant safety.

[0032] [Other embodiments] It should be noted that the embodiments described above are merely illustrative embodiments of the present invention, and it goes without saying that the present invention can take various modified forms within the scope of the technical concept disclosed herein.

[0033] For example, in the embodiment described above, the two reinforcements 230a and 230b were assumed to have the same shape, but they may have different shapes. Also, the shape of the convex portion 238 is not limited to the shape formed by drawing on one side and concave on the other, as described above, but may be formed by a convex mold so that the other side is flat.

[0034] Furthermore, in the embodiment described above, the two reinforcements 230a and 230b were in contact at only one protrusion 238, but multiple protrusions 238 may be provided, and the reinforcements may be in contact at multiple points by these protrusions 238. Also, the joining of the protrusions 238 is not limited to the adhesive and spot welding described above, but may be done with adhesive alone, welding alone, or fastening with bolts or the like.

[0035] Furthermore, in the above-described embodiment, both sides of the main body 232 (the region 112a on which the main body 232 faces and the region 112b on the opposite side) were filled. However, it is also possible to fill only the region 112a on which the main body 232 faces, so that the main body is exposed to the outside of the side frame 112 in the left-right direction in the region 112b on the opposite side.

[0036] Furthermore, in the embodiment described above, the flange portion 236 was exposed to the outside in the front-rear direction of the side frame 112, but the flange portion 236 may also be embedded in the resin by filling the resin in the front-rear direction (X direction and the opposite direction) of the flange portion 236.

[0037] Furthermore, in the embodiments described above, the reinforcements 230a and 230b have only a main body portion 232 and no extension portion, but these reinforcements may also have an extension portion.

[0038] Furthermore, although the above-described embodiment states that the reinforcement 230 is positioned at the lower end of the side frame 112, the position of the reinforcement 230 is not limited to this, and it can be positioned at any position, such as the upper end or the intermediate part between the lower and upper ends. In addition, reinforcements may be positioned at multiple different locations on the side frame 112, such as at the lower end and upper end, at the lower end and the intermediate part, or multiple reinforcements in the intermediate part. In this case, all of the multiple reinforcements may be the reinforcement 230 made by combining the multiple pieces described above, or the reinforcement 230 described above may be combined with reinforcements of other configurations. It goes without saying that the upper frame 114 and cushion frame may also have reinforcements.

[0039] Furthermore, in the above-described configuration, the main body portions 232 of reinforcement 230a and reinforcement 230b are assumed to have substantially the same shape as the lower end region of the side frame 112. However, it goes without saying that the shape of the main body portion 232 is not limited to this.

[0040] Furthermore, the surfaces of reinforcement 230a and reinforcement 230b that come into contact with the resin of the side frame 112 may be roughened to increase the bonding strength with the resin.

[0041] Furthermore, the seat having the aforementioned seat frame 200 may be a foldable side seat or the like.

[0042] Furthermore, seats having the aforementioned seat frame 200 may be used not only in automobiles, but also in all kinds of moving objects such as flying cars, buses, trucks, trains, airplanes, helicopters, and ships. [Industrial applicability]

[0043] The sheet frame according to the present invention can increase the strength of a sheet for a mobile device. [Explanation of Symbols]

[0044] 100 Seat Frame 110 Seat Back Frame 112 Side Frame 112a Areas where the main body faces each other 112b Area opposite the main body 114 Upper Frame 118 Width-direction spring 120 Cushion Frame 122 Side Frame 124 Front Frame 126 Backframe 128 Front-rear spring 130 Reinforcement 132 Main body 134 Extension 140 Slide Rail 200 Seat Frame 230, 230a, 230b reinforcement 232 Main body 234 Extension 236 Flange section 239a, 239b Insertion holes 400 Mobile Units 410 Mobile seat

Claims

1. A seat frame for a mobile vehicle, in which a reinforcement is attached to the resin side frame of the seat back frame, The aforementioned reinforcement is, A flat main body, A pair of flange portions are provided at both the front and rear ends of one side of the main body, The main body has a protrusion provided on the other side of the main body, The two reinforcements are joined together at their protrusions, and the resin constituting the side frame is inserted around the protrusions and joined to the side frame. Seat frame.

2. The two reinforcements are welded together at their protrusions. The seat frame according to claim 1.

3. The two reinforcements are arranged such that the flange portion is exposed to the outside of the side frame. The seat frame according to claim 1.

4. A seat for a mobile body, having the seat frame described in any one of claims 1 to 3.

5. A mobile body having the mobile body sheet described in claim 4.

6. The mobile body according to claim 5, which is an automobile.

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