Seat frame, seat, and movable body

Abstract

To provide a seat frame having a new connection mechanism for connecting a frame member made of a resin and a first member made of metal.SOLUTION: A seat frame 3 includes a frame member 6 made of a resin, a first member 7 made of metal, and a fixing mechanism 8 for fixing the first member 7 to the frame member 6, wherein the fixing mechanism 8 has a nut 811 embedded into the frame member 6, and a bolt 812 which is screwed with the nut 811 in a state of being inserted into the first member 7, and the first member 7 has regulation members 714A and 714B for regulating movement accompanied by rotation in a loosening direction of the bolt 812 by being brought into contact with a head 812b of the bolt 812.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] A seat for an automobile or the like has a seat frame and cushioning materials such as a seat cushion and a seat back. Patent Document 1 discloses a seat frame having a frame member made of resin (specifically, made of fiber-reinforced synthetic resin) and a first member (specifically, a bracket) made of metal fixed to the frame member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 55-89357 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technical field of seat frames as described above, there is a demand for a seat frame that includes a novel connecting mechanism for connecting a resin frame member and a metal first member.

[0005] An object of the present invention is to provide a seat frame, a seat, and a moving body that are provided with a novel fixing mechanism for fixing a resin frame member and a metal first member. [Means for solving the problem]

[0006] One aspect of the seat frame according to the present invention is A resin frame member; a first member made of metal; a fixing mechanism that fixes the first member to the frame member, The fixing mechanism is A nut embedded in the frame member; a bolt that is inserted through the first member and threadedly engages with the nut, The first member has a restricting member that abuts against the head of the bolt to restrict movement that accompanies rotation of the bolt in the loosening direction.

[0007] One aspect of a seat according to the present invention includes the above-described seat frame.

[0008] One aspect of the moving body according to the present invention includes the above-described seat. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a seat frame, a seat, and a moving body that are provided with a novel fixing mechanism for fixing a resin frame member and a metal first member. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a side view of a moving body according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of a seat frame according to the embodiment of the present invention. [Figure 3] FIG. 3 is a partial side view of the seat frame as seen from the direction indicated by the arrow A1 in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along the line X1-X1 of FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along the line X2-X2 of FIG. [Figure 6] FIG. 6 is a cross-sectional view illustrating the steps of the nut separating operation. [Figure 7] FIG. 7 is a cross-sectional view illustrating the steps of the nut separating operation. [Figure 8] FIG. 8 is a cross-sectional view showing a state where the nut separating operation has been completed. [Figure 9] FIG. 9 is a cross-sectional view illustrating the steps of the bolt separation operation. [Figure 10] FIG. 10 is a cross-sectional view showing the state after the bolt separation operation is completed. [Figure 11] FIG. 11 is a cross-sectional view illustrating the steps of the bolt assembly work. [Figure 12] FIG. 12 is a cross-sectional view illustrating the steps of the bolt assembly work. [Figure 13] FIG. 13 is a cross-sectional view illustrating the steps of the bolt assembly work. DETAILED DESCRIPTION OF THE INVENTION

[0011] The seat frame, seat, and moving body according to the present invention will be described in detail below with reference to the drawings. Note that the seat frame, seat, and moving body described below are examples of the seat frame, seat, and moving body according to the present invention, and the present invention is not limited to the embodiments described below.

[0012] [Embodiment] A moving object 1, a seat 2, and a seat frame 3 according to an embodiment of the present invention will be described with reference to FIGS.

[0013] FIG. 1 is a side view of a moving body 1. An example of the moving body 1 is an automobile as shown in FIG. 1. However, the moving body 1 is not limited to an automobile, and may be various moving bodies (moving devices). Specifically, the moving body 1 may be a ship, an aircraft, a drone, an industrial robot, or the like. When the moving body 1 is an automobile, the moving body 1 may be a passenger car, a bus, a truck, a work vehicle, or the like.

[0014] In the following, when describing the structures of the moving body 1, the seat 2, and the seat frame 3, a Cartesian coordinate system (X, Y, Z) shown in each drawing will be used.

[0015] The X direction corresponds to the front-to-back direction of the moving body 1. The positive side of the X direction corresponds to the front side of the moving body 1. The negative side of the X direction corresponds to the rear side of the moving body 1. The Y direction corresponds to the left-to-right direction of the moving body 1. The positive side of the Y direction corresponds to the left side when looking at the moving body 1 from behind. The negative side of the Y direction corresponds to the right side when looking at the moving body 1 from behind.

[0016] The Z direction corresponds to the up-down direction of the moving body 1. The positive Z direction corresponds to the upper side of the moving body 1. The negative Z direction corresponds to the lower side of the moving body 1. In this specification, the upper side means the upper side in the vertical direction. Also, the lower side means the lower side in the vertical direction.

[0017] The moving object 1 includes a seat 2. The seat 2 is a rear seat of the moving object 1 (i.e., a rear seat). The seat according to the present invention is not limited to a rear seat. The seat according to the present invention may be a front seat of the moving object 1 (i.e., a front seat).

[0018] The seat 2 has a seat frame 3 (see FIG. 2). The seat frame 3 is covered with a seat cover (not shown). A pad (not shown) and a cushioning material (not shown) such as urethane are provided inside the seat cover.

[0019] Fig. 2 is a perspective view of a seat frame 3 according to an embodiment of the present invention. The seat frame 3 has a cushion portion 4 and a back portion 5. Note that a restricting member 714A of a fixing mechanism 8, which will be described later, is omitted from Fig. 2. Fig. 3 is a partial side view of the seat frame 3 as seen from the direction indicated by arrow A1 in Fig. 2.

[0020] Fig. 4 is a cross-sectional view taken along the line X1-X1 in Fig. 3. Fig. 4 shows a cross-sectional view of the left frame portion 61 and the right frame portion 62 of the seat frame 3. Fig. 5 is a cross-sectional view taken along the line X2-X2 in Fig. 3. Fig. 5 shows a cross-sectional view of the left frame portion 61 and the right frame portion 62 of the seat frame 3.

[0021] 3, 4, and 5 is referred to as the assembled state of the seat frame 3. The assembled state of the seat frame 3 also corresponds to the state of the seat 2 assembled into the moving body 1. Unless otherwise specified, the seat frame 3 and the components of the seat frame 3 in the assembled state will be described below.

[0022] The cushion 4 forms the framework of a seat cushion 21 (see FIG. 1) of the seat 2. The seat cushion 21 is a portion that supports the user's buttocks from below. The cushion 4 is formed in the shape of a rectangular frame.

[0023] The back portion 5 constitutes the framework of a seat back portion 22 (see FIG. 1) of the seat 2. The seat back portion 22 is a portion that supports the user's waist and back from behind.

[0024] The back section 5 is rotatable relative to the cushion section 4. Specifically, the back section 5 rotates relative to the cushion section 4 around a rotation center axis 51 (see FIG. 2). The seat 2 has a reclining mechanism 23 (see FIG. 3) that adjusts the angle of the back section 5 relative to the cushion section 4.

[0025] The back portion 5 includes a seat back frame 6, a reinforcing member 7, and a fixing mechanism 8.

[0026] The seatback frame 6 is an example of a frame member and is made of resin. The seatback frame 6 is configured in a substantially U-shape. The seatback frame 6 has a left frame portion 61, a right frame portion 62, and a connecting frame portion 63 (see FIG. 2).

[0027] In the following description, unless otherwise specified, the terms "inside" and "outside" refer to the inside and outside in the width direction of the seatback frame 6. The width direction of the seatback frame 6 coincides with the Y direction (i.e., the left-right direction of the moving body 1) in the Cartesian coordinate system (X, Y, Z) shown in each drawing.

[0028] The inward direction in the width direction of the seatback frame 6 means a direction approaching the center O1 (see FIG. 4) in the left-right direction of the seatback frame 6. The outward direction in the width direction of the seatback frame 6 means a direction away from the center O1 (see FIG. 4) in the left-right direction of the seatback frame 6.

[0029] The left frame portion 61 extends in the vertical direction when the seat 2 is in the standard state. The standard state of the seat 2 refers to a state in which the seatback portion 22 is parallel to the vertical direction (i.e., the Z direction). The seat 2 shown in FIG. 2 is slightly tilted rearward from the standard state. In the following description of the seatback frame 6, the directions of the components that make up the seatback frame 6 refer to the directions when the seat 2 is in the standard state.

[0030] The left frame portion 61 has a left groove portion 611 (see FIG. 4) extending in the up-down direction on the front side surface. The lower end portion of the left frame portion 61 is connected to the left rear end portion of the cushion portion 4 via a left reinforcing member 71a of the reinforcing member 7 described below (see FIG. 2).

[0031] The right frame portion 62 extends in the vertical direction when the seat 2 is in the standard state. The right frame portion 62 and the left frame portion 61 are spaced apart in the horizontal direction and arranged parallel to each other. The right frame portion 62 has a right groove portion 621 (see FIG. 4) extending in the vertical direction on its front side surface.

[0032] The lower end of the right frame portion 62 is connected to the right rear end of the cushion portion 4 via a right reinforcing member 71b of the reinforcing member 7 described below (see FIG. 2).

[0033] The connecting frame portion 63 extends in the left-right direction and connects the left frame portion 61 and the right frame portion 62 in the left-right direction. Specifically, the connecting frame portion 63 connects the upper end of the left frame portion 61 and the upper end of the right frame portion 62 in the left-right direction.

[0034] The reinforcing member 7 is an example of a first member and is made of metal. The reinforcing member 7 has a left reinforcing member 71a and a right reinforcing member 71b. The left reinforcing member 71a and the right reinforcing member 71b are each an example of a first member. The reinforcing member 7 may be part of the reclining mechanism 23, for example, an upper arm of the reclining mechanism 23. In this case, the upper arm is rotatably provided with respect to a lower arm of the reclining mechanism 23, and the lower arm may be connected to the rear of the cushion 4.

[0035] The left reinforcing member 71a is a metal plate-shaped member that is arranged along the left frame portion 61. The left reinforcing member 71a is fixed to the left frame portion 61 by a left fixing mechanism 81 of the fixing mechanism 8, which will be described later. The left reinforcing member 71a is connected to the left rear end of the cushion portion 4 in a state in which it can rotate relative to the cushion portion 4.

[0036] The left reinforcing member 71a has a main body 711, a front restricting portion 712, a rear restricting portion 713, and restricting members 714A and 714B. The main body 711, the front restricting portion 712, and the rear restricting portion 713 are made by pressing a single metal plate or the like.

[0037] The main body 711 is parallel to the XZ plane and has a plate shape that is long in the vertical direction. The main body 711 is disposed along the left side surface of the left frame part 61. The main body 711 has at least one elongated hole 711a, 711b (two in this embodiment). The elongated holes 711a, 711b are elongated holes that are long in the vertical direction. The elongated holes 711a and 711b have the same shape.

[0038] Hereinafter, the width of the slot 711a refers to the dimension in the short direction of the slot 711a (front-rear direction in this embodiment), and the length of the slot 711a refers to the dimension in the long direction of the slot 711a (up-down direction in this embodiment).

[0039] The elongated holes 711a and 711b penetrate the main body 711 in the left-right direction (in other words, in the thickness direction of the main body 711). The elongated holes 711a and 711b are arranged side by side on a straight line that is parallel to the up-down direction. A bolt 812 (specifically, a shaft 812a of the bolt 812) of the fixing mechanism 8, which will be described later, is inserted into the elongated holes 711a and 711b.

[0040] The front restricting portion 712 is provided at the front end of the main body portion 711. The front restricting portion 712 restricts forward and left-right movement of the left frame portion 61. Specifically, the front restricting portion 712 has a first portion 712a and a second portion 712b.

[0041] The first portion 712a extends inward (to the right in this embodiment) from the front end of the main body portion 711. The first portion 712a is parallel to the YZ plane and has a plate shape that is long in the up-down direction. The first portion 712a is disposed along the front side surface of the left frame portion 61. The first portion 712a abuts against the front side surface of the left frame portion 61, thereby restricting forward movement of the left frame portion 61.

[0042] The second portion 712b extends rearward from the inner end (the right end in this embodiment) of the first portion 712a. The second portion 712b is a plate-like member that is parallel to the XZ plane and is long in the vertical direction. The second portion 712b is disposed inside the left groove portion 611 of the left frame portion 61.

[0043] The second portion 712b restricts left-right movement of the left frame portion 61 based on contact with the inner surface of the left groove portion 611. The second portion 712b corresponds to an example of a left-side restriction portion. In the case of the right-side reinforcing member 71b, the second portion 712b of the right-side reinforcing member 71b corresponds to an example of a right-side restriction portion.

[0044] The rear restricting portion 713 is provided at the rear end of the main body portion 711. The rear restricting portion 713 restricts rearward movement of the left frame portion 61. The rear restricting portion 713 extends inward (to the right in this embodiment) from the rear end of the main body portion 711. The rear restricting portion 713 is in the shape of a plate parallel to the YZ plane.

[0045] The rear restricting portion 713 is disposed along the rear side surface of the left frame portion 61. The rear restricting portion 713 comes into contact with the rear side surface of the left frame portion 61, thereby restricting rearward movement of the left frame portion 61.

[0046] The restricting members 714A and 714B are each provided on the main body 711. The restricting member 714A is provided corresponding to a left-side fixing mechanism 81a in the fixing mechanism 8 described below. The restricting member 714B is provided corresponding to a left-side fixing mechanism 81b in the fixing mechanism 8 described below. In the present embodiment, the left-side reinforcing member has two restricting members. However, the number of restricting members may be determined depending on the number of left-side fixing mechanisms in the fixing mechanism.

[0047] In the case of the right-side reinforcing member 71b, the restricting member 714A of the right-side reinforcing member 71b is provided to correspond to a right-side fixing mechanism 81c of the fixing mechanism 8 described later. Also, the restricting member 714B of the right-side reinforcing member 71b is provided to correspond to a right-side fixing mechanism 81d of the fixing mechanism 8 described later.

[0048] The restricting members 714A and 714B are each formed of a separate member from the main body 711. Specifically, the restricting members 714A and 714B are each provided on the outer surface of the main body 711 (the left side surface in this embodiment).

[0049] The outer surface of the main body 711 is the side surface farthest from the left frame portion 61 of both side surfaces in the thickness direction of the main body 711. On the other hand, the side surface closer to the left frame portion 61 of both side surfaces in the thickness direction of the main body 711 is the inner surface of the main body 711.

[0050] Such restricting members 714A, 714B come into contact with a head 812b of a bolt 812 in a fixing mechanism 8, which will be described later, thereby restricting movement of the bolt 812 that occurs as the bolt 812 rotates in the loosening direction. The loosening direction of the bolt 812 refers to the direction in which the bolt 812 rotates when the bolt 812 is released from the nut 811. On the other hand, the direction opposite to the loosening direction is referred to as the tightening direction.

[0051] Each of the restricting members 714A and 714B has a fixing portion 714a and a restricting portion 714b. The fixing portion 714a and the restricting portion 714b of the restricting members 714A and 714B will be described below together.

[0052] The fixing portion 714a is a portion that is fixed to the main body portion 711. Specifically, the fixing portion 714a is fixed to the outer surface (the right side surface in this embodiment) of the main body portion 711 by a fixing means such as welding. In this embodiment, the restricting member 714A is configured from a member that is separate from the main body portion 711.

[0053] However, the restricting member 714A and the main body 711 may be configured as a single member. In this case, the restricting member 714A is formed by applying press processing to a part of the main body 711.

[0054] The restricting portion 714b restricts movement in the reverse direction that occurs when a bolt 812 in the fixing mechanism 8, which will be described later, rotates in the loosening direction. The restricting portion 714b is provided integrally with the fixing portion 714a. As shown in FIG. 5, the restricting portion 714b is provided on the outer side (on the right side in this embodiment) of the fixing portion 714a.

[0055] Between the inner surface of the restricting portion 714b and the outer surface of the main body portion 711, there is provided a gap into which at least a part of a head 812b of a bolt 812 in a fixing mechanism 8 (described later) can enter, and in this embodiment, a gap into which a flange portion 812b2 can enter is provided. In other words, the distance between the inner surface of the restricting portion 714b and the outer surface of the main body portion 711 is greater than the thickness dimension of at least a part of the head 812b.

[0056] 3, 4, and 5, the restricting portion 714b overlaps with at least a portion of the head 812b of the bolt 812 in the axial direction of the bolt 812, and in this embodiment, overlaps with at least a portion of the flange 812b2. Also, as shown in Fig. 5, there is a gap between the inner surface of the restricting portion 714b and the flange 812b2. The function of the restricting portion 714b will be described later.

[0057] The restricting member 714B also has an engaging portion 714c. The engaging portion 714c engages with a spring 231 (see FIGS. 3 and 5) of the reclining mechanism 23. The spring 231 constantly biases the engaging portion 714c. The biasing force of the spring 231 is transmitted to the left frame portion 61 via the engaging portion 714c (i.e., the restricting member 714B). The biasing force of the spring 231 is a force that acts in a direction that rotates the seat frame 3 forward.

[0058] The restricting member 714A does not have an engaging portion 714c. In this embodiment, the restricting member 714A and the restricting member 714B are connected by a connecting portion 714d.

[0059] In other words, the restricting members 714A and 714B are formed from a single member. Note that the connecting portion 714d may be omitted. In this case, the restricting members 714A and 714B are formed from separate members.

[0060] The right-side reinforcing member 71b has a configuration that is bilaterally symmetrical to the above-described left-side reinforcing member 71a. Therefore, the above-described description of the left-side reinforcing member 71a may be used with appropriate modifications to the configuration of the right-side reinforcing member 71b. The components of the right-side reinforcing member 71b in Figures 4 and 5 are denoted by the same reference numerals as the corresponding components of the left-side reinforcing member 71a.

[0061] The fixing mechanism 8 fixes the reinforcing members 7 (specifically, the left reinforcing member 71a and the right reinforcing member 71b) to the seat back frame 6 (specifically, the left frame portion 61 and the right frame portion 62). The fixing mechanism 8 has left fixing mechanisms 81a, 81b and right fixing mechanisms 81c, 81d.

[0062] The left-side fixing mechanisms 81a and 81b fix the left-side reinforcing member 71a to the left-side frame portion 61. In the present embodiment, the left-side reinforcing member 71a is fixed to the left-side frame portion 61 by two left-side fixing mechanisms 81a and 81b. However, the number of left-side fixing mechanisms is not limited to two. The number of left-side fixing mechanisms may be one, or three or more.

[0063] The configuration of the upper left fixing mechanism 81a of the left fixing mechanisms 81a, 81b will be described below. The configuration of the lower left fixing mechanism 81b of the left fixing mechanisms 81a, 81b may be appropriately changed from the description of the left fixing mechanism 81a.

[0064] The left fixing mechanism 81 a includes a nut 811 and a bolt 812 .

[0065] The nut 811 is made of metal, resin, or carbon fiber. Examples of metals that make up the nut 811 include iron and aluminum. The resin that makes up the nut 811 is preferably different from the resin that makes up the left frame portion 61. In other words, the nut 811 is preferably made of a material that is different from the material that makes up the left frame portion 61.

[0066] The nut 811 is held by the left frame portion 61 (in other words, the seatback frame 6). The nut 811 is a so-called hexagonal nut. The outer shape of the cross section of the outer circumferential surface of the nut 811 is polygonal (for example, hexagonal). The cross section of the nut 811 means a cross section obtained by cutting the nut 811 along a plane perpendicular to the axial direction of the nut 811.

[0067] The nut 811 is embedded in the left frame portion 61. For example, when the left frame portion 61 or the entire seat back frame 6 is molded by injection molding, the nut 811 is embedded in the left frame portion 61 by insert molding, in which the nut 811 is inserted into a mold. The rotation of the nut 811 itself is restricted based on the engagement between the outer circumferential surface of the nut 811 and the left frame portion 61. When the nut 811 receives a force of a predetermined magnitude in the axial direction, it moves in the axial direction relative to the left frame portion 61.

[0068] In other words, the nut 811 will not move in the axial direction relative to the left frame portion 61 even if it is subjected to an axial force smaller than a predetermined magnitude.

[0069] A first end surface 811a (in other words, an inner end surface) of the nut 811 is not covered with the resin that forms the left frame portion 61. In other words, the entire first end surface 811a of the nut 811 is exposed from the left frame portion 61.

[0070] The first end face of the nut 811 is the end face farther from the left reinforcing member 71a than both axial end faces of the nut 811. In the present embodiment, the first end face 811a of the nut 811 is disposed flush with the inner surface (in other words, the right side surface) of the left frame portion 61.

[0071] On the other hand, the second end face 811b (in other words, the outer end face) of the nut 811 is the end face closer to the left reinforcing member 71a of both axial end faces of the nut 811. The second end face 811b of the nut 811 is not covered with the resin that forms the left frame portion 61. In other words, the entire first end face 811a of the nut 811 is exposed from the left frame portion 61.

[0072] In this embodiment, as shown in Fig. 4, the second end face 811b of the nut 811 protrudes slightly outward (in other words, to the left) from the outer surface (in other words, the left surface) of the left frame portion 61. The second end face 811b of the nut 811 abuts against the inner surface of the left reinforcing member 71a. The second end face 811b of the nut 811 supports the pressing force transmitted from the left reinforcing member 71a.

[0073] In this embodiment, the nut 811 is made of a material that is harder than the resin that makes up the left frame portion 61. Therefore, the nut 811 prevents the left frame portion 61 from being pressed and deformed by the left reinforcing member 71a.

[0074] The second end face 811b of the nut 811 may be located on the same plane as the outer surface (in other words, the left side surface) of the left frame portion 61. From the viewpoint of preventing the left frame portion 61 from being pressed and deformed by the left reinforcing member 71a, it is preferable that the second end face 811b of the nut 811 be located on the same plane as the outer surface of the left frame portion 61 or protrude outward (in other words, to the left) beyond the outer surface of the left frame portion 61.

[0075] The nut 811 also has a female thread 811c on its inner circumferential surface. The female thread 811c is formed on the inner circumferential surface of the nut 811 over the entire length.

[0076] The bolt 812 is made of metal, resin, or carbon fiber. The bolt 812 is inserted through the left reinforcing member 71a and is threadedly engaged with the nut 811. In this state, the bolt 812 fixes the left reinforcing member 71a to the left frame portion 61.

[0077] When the bolt 812 rotates in the loosening direction, it moves in the axial direction of the bolt 812. The movement direction of the bolt 812 at this time is referred to as the rearward direction. On the other hand, when the bolt 812 rotates in the tightening direction, it moves in the direction opposite to the rearward direction. The movement direction of the bolt 812 at this time is referred to as the forward direction.

[0078] Such a bolt 812 has a shaft portion 812a and a head portion 812b. As shown in Fig. 4, the bolt 812 according to this embodiment is a flanged hex bolt in which the head portion 812b has a hexagonal head portion 812b1 and a flange portion 812b2.

[0079] The shaft portion 812a has a male thread portion 812c on its outer circumferential surface. The male thread portion 812c is formed from a first end (in other words, the inner end) to a second end (in other words, the outer end) of the shaft portion 812a. The first end of the shaft portion 812a is the end farther from the left reinforcing member 71a of both axial ends of the shaft portion 812a. On the other hand, the second end of the shaft portion 812a is the end closer to the left reinforcing member 71a of both axial ends of the shaft portion 812a.

[0080] The shaft 812a is inserted through the upper elongated hole 711a in the left reinforcing member 71a. In the case of the lower left fixing mechanism 81b of the left fixing mechanisms 81a and 81b, the shaft 812a is inserted through the lower elongated hole 711b in the left reinforcing member 71a.

[0081] Moreover, the shaft portion 812a is inserted into the nut 811. Specifically, the shaft portion 812a is inserted from the second end face 811b (in other words, the outer end face) of the nut 811 toward the first end face 811a (in other words, the inner end face) of the nut 811. In this state, the male thread portion 812c of the shaft portion 812a is screwed into the female thread portion 811c of the nut 811.

[0082] In this embodiment, the first end of the shaft portion 812a protrudes inward (in other words, to the right) from the first end face 811a of the nut 811.

[0083] The head 812b is provided at a second end (in other words, the outer end) of the shaft portion 812a. In this embodiment, the head 812b has a hexagonal head 812b1 and a flange portion 812b2. The hexagonal head 812b1 is plate-shaped, and the outer peripheral surface of the hexagonal head 812b1 has a hexagonal shape. The outer peripheral surface of the flange portion 812b2 has a circular shape. Note that the shapes of the outer peripheral surfaces of the hexagonal head 812b1 and the flange portion 812b2 refer to the outer shapes of the hexagonal head 812b1 and the flange portion 812b2 when the head 812b is viewed from the axial direction of the bolt 812. The shape of the outer peripheral surface of the flange portion 812b2 may be polygonal (for example, hexagonal).

[0084] The outer diameter of the head 812b is larger than the outer diameter of the shaft 812a, and is also larger than the width and length of the elongated hole 711a.

[0085] 4 and 5, the first side surface (in other words, the inner side surface) of the head portion 812b abuts against the outer side surface of the main body portion 711 of the left reinforcing member 71a. In this embodiment, the seat surface, which is the inner side surface of the flange portion 812b2, abuts against the outer side surface of the main body portion 711 of the left reinforcing member 71a.

[0086] In this embodiment, the outer diameter of the flange portion 812b2 is larger than the width and length of the elongated hole 711a, allowing the head portion 812b to abut against the main body portion 711 over a relatively wide area. As a result, the fixed state between the left frame portion 61 and the main body portion 711 can be stabilized.

[0087] The hexagonal head 812b1 is provided on the second side surface (in other words, the outer side surface) of the flange portion 812b2. The outer peripheral surface of the hexagonal head 812b1 has a hexagonal shape as described above. The outer diameter of the hexagonal head 812b1 is smaller than the outer diameter of the flange portion 812b2. In this embodiment, the head 812b has the hexagonal head 812b1 whose outer peripheral surface has a hexagonal shape, but this is not limited thereto, and the shape of the outer peripheral surface of the portion corresponding to the hexagonal head 812b1 may be a polygon other than a hexagon.

[0088] (Actions and Effects of This Embodiment) The actions and effects obtained from the seat frame 3 according to this embodiment will be described below with reference to Figures 5 to 13. In Figures 6 to 13, the right frame portion 62, the right reinforcing member 71b, and the right fixing mechanisms 81c and 81d are omitted.

[0089] The seat frame 3 of this embodiment is equipped with a novel fixing mechanism 8 for connecting the resin seat back frame 6 and the metal reinforcing members 7 (specifically, the left reinforcing member 71a and the right reinforcing member 71b) as described above.

[0090] Recently, from the viewpoint of environmental protection and resource conservation, there has been a demand for recycling the seat frame 3. To efficiently recycle, it is necessary to separate the seat frame 3 into individual materials. In the case of the seat frame 3 according to this embodiment, it is necessary to separate the resin seat back frame 6 and the metal reinforcing member 7.

[0091] Furthermore, in the case of the seat frame 3 according to this embodiment, the nuts 811 are embedded in the seat back frame 6 (specifically, the left frame portion 61 and the right frame portion 62). Therefore, it is necessary to separate the seat back frame 6 and the nuts 811.

[0092] 5 to 7, the steps of the work of separating the seat back frame 6 from the nut 811 (hereinafter referred to as the nut separating work) will be described. In the following description, the subject performing the nut separating work is a worker, but it may also be a robot (including a robot arm).

[0093] 5 shows the seat frame 3 in an assembled state. When the seat frame 3 is assembled, the shaft 812a of the bolt 812 is disposed in the position closest to the restricting portion 714b in the elongated hole 711a of the left-side reinforcing member 71a. The position closest to the restricting portion 714b in the elongated hole 711a is referred to as the first position of the elongated hole 711a.

[0094] With the shaft portion 812a disposed at the first position of the elongated hole 711a, the restricting portion 714b overlaps in the axial direction with a portion of the head 812b of the bolt 812. That is, with the seat frame 3 assembled, the restricting portion 714b and at least a portion of the head 812b of the bolt 812 overlap in a plan view seen in the axial direction of the bolt 812. In this embodiment, with the seat frame 3 assembled, at least a portion of the flange portion 812b2 of the head 812b overlaps with the restricting portion 714b in a plan view seen in the axial direction of the bolt 812.

[0095] First, with the seat frame 3 in an assembled state, the worker engages the tool 91 (see FIG. 5) with the head 812b of the bolt 812 of the left-side fixing mechanism 81a. As shown in FIG. 5, with the seat frame 3 in an assembled state, a gap is provided between the outer peripheral surface of the head 812b and the restricting portion 714b, allowing the tool 91 to enter and engage with the head 812b when rotating the bolt 812.

[0096] Next, the worker rotates the tool 91 in the loosening direction α1 (see FIG. 5). As a result, the bolt 812 rotates in the loosening direction α1 relative to the nut 811 and moves backward (to the left in FIG. 5). Then, the bolt 812 moves backward to the position shown in FIG. 6.

[0097] 6, the flange portion 812b2 of the bolt 812 abuts against the restricting portion 714b in the axial direction. In this state, the restricting portion 714b restricts the movement of the bolt 812 in the backward direction based on the abutment with the flange portion 812b2 in the axial direction. The position of the bolt 812 shown in FIG. 6 is referred to as the restricted position of the bolt 812.

[0098] In the state shown in FIG. 6, the inner surface (the right side surface in FIG. 6) of the flange portion 812b2 is separated from the outer surface (the left side surface in FIG. 6) of the main body portion 711 of the left reinforcing member 71a.

[0099] Next, the operator further rotates the tool 91 in the loosening direction α1 in the state shown in Fig. 6. In the state shown in Fig. 6, the movement of the bolt 812 in the rearward direction is restricted by the restricting portion 714b. Therefore, the bolt 812 rotates in the loosening direction α1 in the restricted position shown in Fig. 6. At this time, the bolt 812 does not move in the rearward direction.

[0100] When the bolt 812 rotates in the loosening direction α1 in the restricted position shown in Figure 6, a thrust force in the forward direction of the bolt 812 (to the right in Figure 6) is applied to the nut 811 based on the threaded engagement between the male thread portion 812c of the shaft portion 812a of the bolt 812 and the female thread portion 811c of the nut 811.

[0101] Then, the nut 811 moves in the forward direction based on the thrust. After the nut 811 moves to the position shown in Fig. 7, it is released from the left frame portion 61. After the nut 811 moves to the position shown in Fig. 7, the worker rotates the nut 811 in the loosening direction to release the nut 811 from the bolt 812.

[0102] The worker performs the same nut separation work on the left-side fixing mechanisms 81a and 81b provided on the left-side frame portion 61 and the right-side fixing mechanisms 81c and 81d provided on the right-side frame portion 62. When all the nuts 811 have been separated from the seat back frame 6, the nut separation work is completed.

[0103] In this embodiment, the seatback frame 6 is sandwiched between the left reinforcing member 71a and the right reinforcing member 71b in the left-right direction. In other words, the left reinforcing member 71a and the right reinforcing member 71b restrict left-right movement of the seatback frame 6. Therefore, during the nut separation work, the seatback frame 6 does not move as the bolt 812 rotates in the loosening direction. Therefore, during the nut separation work, there is no need to prepare a separate jig to hold the seatback frame 6 in the left-right position.

[0104] Figure 8 is a cross-sectional view showing the left frame portion 61, left reinforcing member 71a, and bolt 812 after the nut separation operation has been completed. In the state shown in Figure 8, the flange portion 812b2 of the bolt 812 overlaps with the restricting portion 714b in the axial direction. Therefore, in this state, the bolt 812 cannot be moved in the reverse direction (left side in Figure 8).

[0105] The process of separating the bolt 812 from the left frame portion 61 and the left reinforcing member 71a (hereinafter referred to as the bolt separating process) will be described below.

[0106] First, the worker moves the left frame portion 61 upward in the state shown in Fig. 8. Then, the bolt 812 moves upward together with the left frame portion 61. As a result, the bolt 812 moves to the position shown in Fig. 9.

[0107] 9, the shaft 812a of the bolt 812 is disposed at the position farthest from the restricting portion 714b in the elongated holes 711a and 711b of the left reinforcing member 71a. The position farthest from the restricting portion 714b in the elongated holes 711a and 711b is referred to as the second position of the elongated holes 711a and 711b.

[0108] With the shaft portion 812a positioned at the second position of the elongated holes 711a and 711b, the restricting portion 714b does not axially overlap with a portion of the flange 812b2 of the bolt 812. In this state, the operator moves the bolt 812 in the rearward movement direction. As a result, as shown in FIG. 10, the bolt 812 separates from the left frame portion 61 and the left reinforcing member 71a.

[0109] Next, the operation of assembling the bolt 812 to the left frame portion 61 and the left reinforcing member 71a (hereinafter referred to as bolt assembling operation) will be described with reference to FIGS.

[0110] The worker arranges the left frame portion 61 and the left reinforcing member 71a in the state shown in Fig. 11. In the state shown in Fig. 11, a nut 811 is embedded in the left reinforcing member 71a. The nut 811 is embedded in the left reinforcing member 71a by insert molding.

[0111] 11, the outer end surface of the nut 811 (the left end surface in FIG. 11) axially overlaps with the elongated holes 711a and 711b of the left reinforcing member 71a. In this state, the worker inserts the bolt 812 into the elongated holes 711a and 711b of the left frame portion 61.

[0112] Then, the bolt 812 is rotated in the tightening direction α2 (see FIG. 12) to screw the male thread portion 812c of the shaft portion 812a of the bolt 812 into the female thread portion 811c of the nut 811. This brings the bolt 812, left frame portion 61, and left reinforcing member 71a into the state shown in FIG. 12. This operation is performed using tool 91 (see FIG. 6).

[0113] 12, the flange portion 812b2 of the bolt 812 is disposed inside (to the right in FIG. 12) the restricting portion 714b of the restricting member 714A. Note that in the state shown in FIG. 12, the bolt 812, the nut 811, and the left frame portion 61 are movable in the up and down direction relative to the left reinforcing member 71a.

[0114] Next, the worker moves the left frame portion 61 downward relative to the left reinforcing member 71a from the state shown in Fig. 12. This brings the bolt 812, left frame portion 61, and left reinforcing member 71a into the state shown in Fig. 13. In this state, the flange portion 812b2 of the bolt 812 overlaps with the restricting portion 714b in the axial direction.

[0115] Then, the worker rotates the bolt 812 in the tightening direction α2 (see FIG. 12) to completely screw the bolt 812 into the nut 811. As a result, the left frame portion 61 is fixed to the left reinforcing member 71a (see FIG. 5).

[0116] As described above, the seat frame 3 according to this embodiment makes it easy to perform the nut separation work of separating the seat back frame 6 (specifically, the left frame portion 61 and the right frame portion 62) from the nut 811. Other functions and effects obtained from the seat frame 3 according to this embodiment are as described above.

[0117] (Addendum) In the above-described embodiment, the reinforcing member 7 is given as an example of the first member made of metal. However, the first member is not limited to the reinforcing member 7. The first member may be various members made of metal and fixed to the frame member. [Industrial Applicability]

[0118] The seat frame, seat, and moving body according to the present invention can be applied to various moving bodies. [Explanation of symbols]

[0119] 1. Mobile 2 seats 3 Seat frame 6 Seat back frame (frame member) 7 Reinforcing member (first member) 711 Main body 714A, 714B Restriction member 8 Fixing mechanism 811 Nut 812 volts 812b Head

Claims

1. A resin frame member; a first member made of metal; a fixing mechanism that fixes the first member to the frame member, The fixing mechanism includes: a nut embedded in the frame member; a bolt that is inserted through the first member and threadedly engages with the nut, The first member has a restricting member that restricts movement of the bolt caused by rotation of the bolt in the loosening direction by contacting the head of the bolt. Seat frame.

2. When the bolt rotates in the loosening direction while the movement of the bolt is restricted by the restricting member, the nut moves and separates from the frame member. The seat frame according to claim 1 .

3. The nut is embedded in the frame member in a state where rotation is restricted. The seat frame according to claim 1 .

4. Of both end surfaces of the nut in the axial direction, the end surface farther from the first member is not covered with the resin constituting the frame member, The seat frame according to claim 1 .

5. The bolt is a shaft portion that is inserted into the first member; a seat portion provided at one end of the shaft portion; a head provided at one end of the seat, the restricting member has a restricting portion that overlaps with the seat portion in a plan view seen from the axial direction, The restricting portion restricts the movement of the bolt based on contact with the seat portion in the axial direction. The seat frame according to claim 1 .

6. the first member has an elongated hole through which the shaft portion is inserted, The restriction portion is When the shaft portion is disposed at a first position of the elongated hole, the shaft portion overlaps with the seat portion in a plan view seen from the axial direction, When the shaft portion is disposed at the second position of the elongated hole, the shaft portion does not overlap with the seat portion in a plan view seen from the axial direction. The seat frame according to claim 5.

7. A gap is provided between the outer peripheral surface of the head and the restricting portion, allowing a tool to enter when engaging with the head to rotate the bolt. The seat frame according to claim 5.

8. The nut is made of a material different from the material that constitutes the frame member. The seat frame according to claim 1 .

9. The frame member is The left frame and a right frame portion; The first member is a left reinforcing member disposed on a left side surface of the left frame portion; a right reinforcing member disposed on a right side surface of the right frame portion, The fixing mechanism includes: a left fixing mechanism that fixes the left reinforcing member to the left frame portion; a right-side fixing mechanism that fixes the right-side reinforcing member to the right-side frame portion, The seat frame according to claim 1 .

10. the left reinforcing member has a left restriction portion that restricts left-right movement of the left frame portion, The right reinforcing member has a right restriction portion that restricts movement of the right frame portion in the left-right direction. The seat frame according to claim 9.

11. The restricting member transmits the biasing force of a spring constituting a reclining mechanism that adjusts the angle of the seat frame to the frame member via the first member. The seat frame according to claim 1 .

12. A seat frame comprising: the seat frame according to claim 1; Sheet.

13. A sheet according to claim 12, Mobile object.

Images