JP2020175712A - Vehicle sheet - Google Patents

Abstract

To configure a portion having an impact relieving function in rear-end collision of a vehicle sheet so that the number of components is reduced.SOLUTION: A vehicle sheet includes a seat cushion and a seat back, in which the seat back has a resin-made seat back frame and a metal bracket that is molded integrally with the resin-made seat back frame and mounts the resin-made seat back frame on other member, a plurality of holes having different diameters are arrayed side by side on the metal bracket in order of the size of the diameter, the inside of the plurality of holes having the different diameters formed on the metal bracket is filled with a resin, which is the same material as that of the resin-made seat back frame.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat having a function of cushioning an impact applied to a occupant when a rear-end collision occurs.

The vehicle seat absorbs the impact on the occupant during a rear-end collision, that is, a part of the seat back frame or a part of the reclining device to protect the occupant in the event of a rear-end collision. A structure is provided for this purpose.

As a configuration for absorbing such an impact, for example, in Patent Document 1 (Japanese Patent Laid-Open No. 10-230767), a strong fragile portion is provided on the side wall of the main frame of the seat back, and an impact force when collided is applied. At that time, a configuration that causes buckling deformation of the main frame in this strong fragile portion is described.

Further, Patent Document 2 (Japanese Unexamined Patent Publication No. 2005-186670) describes a configuration in which a plurality of shock absorbing holes are formed in a side frame inner that connects a frame on the seat back side and a reclining adjuster.

Further, in Patent Document 3 (Japanese Unexamined Patent Publication No. 2015-40001), a portion where the resin frame on the seat back side and the metal bracket are connected by using rivets is connected to the inner peripheral surface along the circumferential direction. A configuration using a metal collar forming a hat having a cavity is described.

Japanese Unexamined Patent Publication No. 10-230767 Japanese Unexamined Patent Publication No. 2005-186670 JP-A-2015-40001

It is an important configuration to protect the occupants to have a function to mitigate the impact applied to the occupant in the event of a rear-end collision (a rear-end collision mitigation function), but by adding this function, the vehicle It is not preferable to increase the manufacturing cost of the sheet.

From the viewpoint of reducing the manufacturing cost, it is possible to reduce the number of parts by integrally molding the resin frame on the seat back side and the metal bracket, and then configure the part that has a rear-end collision mitigation function. desirable.

However, in the configuration in which the strength-fragile portion is provided on the side wall of the main frame of the seat back as described in Patent Documents 1 to 3, the portion having the impact mitigation function at the time of a rear-end collision is configured by reducing the number of parts. Not considered.

INDUSTRIAL APPLICABILITY The present invention provides a vehicle seat that solves the above-mentioned problems of the prior art and enables a portion having a rear-end collision mitigation function to be configured by reducing the number of parts.

In order to solve the above-mentioned problems, in the present invention, in a vehicle seat provided with a seat cushion and a seat back, the seat back is integrally molded with a resin seat back frame and the resin seat back frame. It has a metal bracket for attaching a resin seat back frame to other members, and in this metal bracket, a plurality of holes having different diameters are arranged in order of diameter size, and are formed on the metal bracket. The inside of a plurality of holes having different diameters was formed by filling a resin of the same material as the resin seat back frame.

Further, in order to solve the above-mentioned problems, in the present invention, in a vehicle seat provided with a seat cushion and a seat back, the seat back includes a resin seat back frame and the resin seat back frame. The front surface formed at right angles to the surface for attaching to the other member and the surface for attaching to the other member in front of the surface for attaching to the other member, and the surface for attaching to the other member. It has a resin seat back frame and a metal bracket integrally molded with a rear surface formed at right angles to the surface for attaching to other members at the rear, and the front surface of the metal bracket A plurality of holes having a diameter decreasing in order from the top are formed, and a plurality of holes having a diameter increasing in order from the top are formed on the rear surface of the metal bracket, and are formed on the front surface of the metal bracket. The inside of the plurality of holes and the plurality of holes formed on the rear surface of the metal bracket was formed by filling the inside with a resin of the same material as the resin seat back frame.

Further, in order to solve the above-mentioned problems, in the present invention, in the vehicle seat provided with the seat cushion and the seat back, the seat back is integrated with the resin seat back frame and the resin seat back frame. It has a metal bracket that is molded and attaches the resin seat back frame to other members, and on the side where a tensile force is generated on the resin seat back frame when the seat back receives an impact load in the rear direction. The metal bracket integrally molded with the resin seat back frame has a plurality of holes whose diameters decrease as the seat back moves away from the position where the impact load is applied in the rear direction, and the seat back has an impact load in the rear direction. On the side where compressive force is generated in the resin seat back frame when receiving, the diameter of the metal bracket integrally molded with the resin seat back frame increases as the seat back moves away from the position where the impact load is applied in the backward direction. A plurality of holes are formed, and the diameter decreases as the distance from the position of the metal bracket receiving the impact load increases. The plurality of holes and the plurality of holes increasing in diameter as the distance from the position receiving the impact load increases. The inside was filled with resin of the same material as the resin seat back frame.

Further, in order to solve the above-mentioned problems, in the present invention, in the vehicle seat provided with the seat cushion and the seat back, the seat back is made of a resin seat back frame and the resin seat back frame. It has a metal bracket that is insert-molded and attaches a resin seat back frame to other members, and the part that is insert-molded with respect to the resin seat back frame of this metal bracket has a plurality of different outer diameters. The protrusions of the above are arranged in order of the size of the outer diameter.

According to the present invention, it is possible to reduce the number of parts to form a portion having a shock absorbing function at the time of a rear-end collision, and it is possible to reduce the manufacturing cost of a vehicle seat.

Further, according to the present invention, the integrally molded seat back frame and the metal bracket are fixed to each other so as to have an impact mitigating function at the time of a rear-end collision, thereby making the seat back frame thinner and making the seat frame thinner. It is made possible to reduce the weight.

Further, according to the present invention, since the metal bracket and the seat back frame are integrally molded by a plurality of through holes formed in the metal bracket having different diameters, the adhesive bonding strength between the metal bracket and the seat back frame is guaranteed. Can now be done easily.

It is a perspective view which shows the appearance of the vehicle seat which concerns on Example 1 of this invention. It is a perspective view which shows the structure of the frame of the seat back of the vehicle seat which concerns on Example 1 of this invention. It is a side view of the frame of the seat back of the vehicle seat which concerns on Example 1 of this invention. It is a perspective view which shows the structure of the metal bracket which connects the frame of the seat back of the vehicle seat which concerns on Example 1 of this invention, and a recliner. It is a side view of the metal bracket which connects the frame of the seat back of the vehicle seat which concerns on Example 1 of this invention, and a recliner. It is sectional drawing AA in FIG. 3 which shows the connection state of the frame of the seat back of the vehicle seat which concerns on Example 1 of this invention, and a metal bracket. It is sectional drawing BB in FIG. 3 which shows the connection state of the frame of the seat back of the vehicle seat which concerns on Example 1 of this invention, and a metal bracket. It is a graph which shows the relationship between the stress and strain generated in the resin member in connection with the frame of the seat back of the vehicle seat which concerns on Example 1 of this invention, and a metal bracket. It is sectional drawing which shows the 1st sectional shape of the resin member in connection with the frame of the seat back of the vehicle seat which concerns on the modification of Example 1 of this invention, and a metal bracket. It is sectional drawing which shows the 2nd sectional shape of the resin member in connection with the frame of the seat back of the vehicle seat which concerns on the modification of Example 1 of this invention, and a metal bracket. It is sectional drawing which shows the 3rd sectional shape of the resin member in connection with the frame of the seat back of the vehicle seat which concerns on the modification of Example 1 of this invention, and a metal bracket. It is sectional drawing which shows the 4th sectional shape of the resin member in connection with the frame of the seat back of the vehicle seat which concerns on the modification of Example 1 of this invention, and a metal bracket. It is sectional drawing which shows the 5th sectional shape of the resin member in connection with the frame of the seat back of the vehicle seat which concerns on the modification of Example 1 of this invention, and a metal bracket. It is a perspective view which shows the structure of the metal bracket which connects the frame of the seat back of the vehicle seat which concerns on Example 2 of this invention, and a recliner. It is a side view of the metal bracket which connects the frame of the seat back of the vehicle seat which concerns on Example 2 of this invention, and a recliner, as seen from the DD direction in FIG. It is a perspective view which shows the structure of the metal bracket which connects the frame of the seat back of the vehicle seat which concerns on Example 3 of this invention, and a recliner. FIG. 5 is a cross-sectional view of a metal bracket connecting a frame of a seat back of a vehicle seat according to a third embodiment of the present invention and a recliner as viewed from the direction of EE in FIG.

In the present invention, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding (insert molding) with fiber reinforced resin, and the seat frame and the metal bracket collide with the portion to be fixed by integral molding. It is configured to have a shock absorbing function at the time.

Further, in the present invention, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding (insert molding) with fiber reinforced resin, and the fixed portion between the seat frame and the metal bracket is cross-sectional area. It is configured to absorb impact energy by connecting with a plurality of connecting members having different cross-sectional areas and destroying the plurality of connecting members having different cross-sectional areas in order at the time of collision.

Further, in the present invention, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding (insert molding) with a resin member, and the fixed portion between the seat frame and the metal bracket has a cross-sectional area. When a plurality of different connecting members are connected and a shear force is generated between the seat frame and the metal bracket for fastening the recliner due to the collision of the vehicle, the hole having a small cross-sectional area is filled. It is configured to absorb impact energy by breaking the resin members in order.

Hereinafter, examples of the present invention will be described with reference to the drawings. However, the present invention is not construed as being limited to the description of the embodiments shown below. It is easily understood by those skilled in the art that a specific configuration thereof can be changed without departing from the idea or purpose of the present invention.

FIG. 1 is a perspective view showing the appearance of the vehicle seat 100 according to the embodiment of the present invention. The vehicle seat 100 includes a seat cushion 110 on which the occupant sits, a seat back 120 on which the occupant seated on the seat cushion 110 leans back, and a headrest 130 for protecting the head of the occupant seated on the seat cushion 110. ing.

The seat cushion 110 includes a seating portion 111 and bank portions 112 on the seat cushion side formed on both sides of the seating portion 111. On the other hand, the seat back 120 includes a backrest portion 121 on which the passenger seated on the seat cushion 110 leans back, and bank portions 122 on the seatback side formed on both sides of the backrest portion 121.

In FIG. 2, reference numeral 150 denotes a seat back frame constituting the seat back 120, which is molded with a fiber reinforced resin. Reference numeral 160 denotes a metal bracket connected to a recliner (not shown), which is integrally molded with the metal bracket 160 by molding a fiber reinforced resin at a pair of lower end portions 151 of the seat back frame 150. Reference numeral 152 denotes a resin member in which a mold on the back side of a pair of lower end portions 151 of the seat back frame 150 is formed thickly.

FIG. 3 is a side view showing a state in which the seat back frame 150 and the metal bracket 160 are integrally molded (insert molded) by a mold. The metal bracket 160 projects from the lower end of the seat back frame 150. The hole 1611 formed in the metal bracket 160 is a hole for attaching to a recliner (not shown).

Here, when the vehicle is rear-end collided with a passenger (not shown) seated on the vehicle seat 100, the seat back frame 150 is rearwardly directed from the passenger (not shown) with respect to the seat back frame 150. It receives an impact force F ₀ (to the right in FIG. 3). The seat back frame 150 that has received the impact force F ₀ acts as a moment force with a recliner (not shown) attached through the hole 1611 formed in the metal bracket 160 as a fulcrum.

In this state, the recliner (not shown) is generally in a fixed state, so that the metal bracket 160 to which the recliner (not shown) is attached cannot rotate through the hole 1611. As a result, a moment force acts on the seat back frame 150 integrally molded with the metal bracket 160, and the seat back frame 150 is slightly tilted backward. As a result, in the seat back frame 150, the front (left side in FIG. 3: the side close to the back of the seated passenger, that is, the side of the front surface of the seat back 120) and the rear (right side in FIG. 3: the seated passenger). Forces in different directions act on the side far from the back, that is, the side of the rear surface opposite to the front surface of the seat back 120.

That is, an upward pulling force (pulling force) F ₁ acts on the front of the seat back frame 150, and a downward pressing force (compressive force) F ₂ acts on the rear of the seat back frame 150.

FIG. 4 shows the appearance of the metal bracket 160. The metal bracket 160 has a front bent surface 162 formed in front of the side surface 161 and a rear bent surface 163 formed in the rear, and the end portion of the rear bent surface 163 has a bent portion 164 bent inward at a right angle. It is formed. The hole 1611 formed on the side surface 161 is a hole for attaching to a recliner (not shown).

On the front bending surface 162, holes 1621, 1622, 1623 having smaller diameters in order from the top are formed in a row at substantially equal intervals in the vertical direction as hole rows 1620 to penetrate. On the other hand, on the rear bending surface 163, holes 1631, 1632, 1633 having diameters increasing in order from the top are formed in a row at substantially equal intervals in the vertical direction as hole rows 1630 to penetrate.

A side view of the metal bracket 160, which is an arrow view seen from the CC direction in FIG. 4, is shown in FIG. On the front bending surface 162, holes 1621, 1622, 1623 having smaller diameters in order from the top are formed in a row at substantially equal intervals in the vertical direction as hole rows 1620 to penetrate. On the other hand, in the rear bent surface 163, holes 1631 and 1632 having larger diameters in order from the top are formed as hole rows 1630 penetrating at a position farther from the side surface 161 than the hole rows 1620 penetrating when viewed from the side surface. , 1633 are formed in a vertical row at substantially equal intervals.

That is, the hole array 1630 that penetrates is formed in the hole column 1620 and the rear folding surface 163 that penetrates is formed in the front folding surface 162, a sequence of holes opposite, front side pulling force F ₁ acts The penetrating hole rows 1620 formed on the bent surface 162 are formed so that their diameters decrease in order from above, and the penetrating hole rows 1630 formed on the rear bent surface 163 on which the compressive force F ₂ acts are formed. the front folding surface 162 pulling force F ₁ acts on the contrary, are formed such that the diameter in this order from top to increase.

That is, the penetrating hole row 1620 formed on the front bending surface 162 on which the tensile force F ₁ acts is the point of action of the impact force F ₀ related to the seat back frame 150 (in FIG. 3, there is one point of action of F ₀₎ . However, since the impact force is actually received from the surface where the passenger's back hits, the hole diameter is arranged so that the diameter of the hole becomes smaller as the distance from the passenger's back (which has a planar spread) increases.

On the other hand, in the hole row 1630 formed on the rear bending surface 163 on which the compressive force F2 acts, the diameter of the hole becomes smaller as it approaches the point of action of the impact force F ₀ related to the seat back frame 150. Have been placed.

FIG. 6 shows a cross-sectional view taken along the line AA in FIG. 3 (a cross section along the front bent surface 162). Further, FIG. 7 shows a cross-sectional view taken along the line BB in FIG. 3 (cross section along the rear bent surface 163). Since the seat back frame 150 and the metal bracket 160 are integrally molded by molding, the inside of the holes 1621, 1622, 1623 formed in the front bending surface 162 in FIG. 6 and the rear bending surface 163 in FIG. The insides of the holes 1631, 1632, and 1633 formed in the above are filled with the resin member 152 at the lower end of the seat back frame 150, respectively.

As described above, the resin member 152 is filled inside the holes 1621, 1622, 1623 formed on the front bent surface 162 and inside the holes 1631, 1632, 1633 formed on the rear bent surface 163. As a result, the seat back frame 150 and the metal bracket 160 are integrally molded, and the metal bracket 160 is fixed to the seat back frame 150.

When the configuration of the seat back frame 150 and the metal bracket 160 is as shown in FIGS. 6 and 7, a tensile force F ₁ is applied to the resin members filled inside the holes 1621, 1622, 1623, and the holes 1631. , 1632, 1633 When a compressive force F ₂ is applied to the resin members filled inside, a shear force is generated in the resin members filled inside the respective holes.

The shear stress generated by this shear force is inversely proportional to the cross-sectional area when the applied shear force is the same. That is, the largest shear stress is generated in the hole 1623 having the smallest cross-sectional area in the through-hole row 1620, and the largest in the hole 1631 having the smallest cross-sectional area in the through-hole row 1630. Shear stress is generated.

The graph of FIG. 8 shows the relationship between the shearing force (f) and the displacement (s) generated in the resin member as a load-stroke diagram (FS diagram). In the graph of FIG. 8, the straight line 801-803 is a shearing force that is a load applied from the metal bracket 160 to the resin members filled in the holes 1621, 1622, 1623 and the holes 1631, 1632, 1633 according to the present embodiment. The relationship between (f) and displacement (s) is shown in combination.

On the other hand, in the straight line 811, as Comparative Example 1, three holes (holes having the same diameter) having a cross-sectional area of one-third of the total cross-sectional area of the holes 1621, 1622, 1623 are formed, and a resin member is formed therein. The relationship between the load (f) and the displacement (s) when the plastic is filled is shown. Further, as Comparative Example 2, the straight line 821 is a case where one hole having a large diameter having the same cross-sectional area as the sum of the cross-sectional areas of the holes 1621, 1622, 1623 is formed and a resin member is filled therein. The relationship between the load (f) and the displacement (s) is shown.

For Comparative Example 1, and varies as the relationship linear 811 displacement and load (f) (s), reach a shear breaking stress where amount of displacement load is reached f ₁₁ becomes s _11, The resin member filled in each of the three holes having the same diameter is broken and cut.

Further, in the case of Comparative Example 2, the relationship between the load (f) and the displacement (s) changes as shown by the straight line 812, and the shear fracture stress is reached when the load reaches f ₁₂ and the displacement amount becomes s _3. , The resin member filled in the hole with a large diameter is broken and cut.

In contrast, in the present embodiment, the load (shearing force) to reach the displacement amount s ₃ when the resin member filled in the hole of larger diameter in Comparative Example 2 is cut by destroying (f) and displacement The relationship of (s) is as shown in the straight line 801-803.

First, the straight line 801 is the load (f) and displacement (s) of the hole 1623 having the smallest cross-sectional area in the penetrating hole row 1620 and the hole 1631 having the smallest cross-sectional area in the penetrating hole row 1630. Show the relationship. When a shear force is applied to the inside of the holes 1621, 1622, 1623 or the resin member filled in the inside of the holes 1631, 1632, 1633, the hole 1623 having the smallest cross-sectional area among the through hole rows 1620 is the largest. A large shear stress is generated, and the largest shear stress is generated in the hole 1631 having the smallest cross-sectional area among the through hole rows 1630. Shear force (f) is the shear force applied to the resin member filled in the hole 1623 and hole 1631 (f) is a resin member which is filled in the hole 1623 and hole 1631 reaching sectional fracture stress rupture was reached f ₁ To do.

The straight line 802 has the second smallest cross-sectional area in the penetrating hole row 1620 and the cross-sectional area in the penetrating hole row 1630 in a state where the resin member filled in the hole 1623 and the hole 1631 is broken. The relationship between the load (f) and the displacement (s) in the second smallest hole 1632 is shown. When the resin members filled in the holes 1623 and 1631 are broken, that is, when the displacement reaches S ₁ , the shearing force applied to the holes 1622 and 1632 becomes a value smaller than f ₁ (stress is attenuated). It increases along the straight line 802. When the shearing force applied to the holes 1622 and 1632 reaches f ₂ , the shearing force (f) applied to the resin member filled in the holes 1622 and 1632 reaches the fracture stress and is filled in the holes 1622 and 1632. The resin member breaks.

The straight line 803 has a cross-sectional area of the hole 1621 having the largest cross-sectional area in the penetrating hole row 1620 and a cross-sectional area of the penetrating hole row 1630 in a state where the resin member filled in the hole 1622 and the hole 1632 is broken. The relationship between the load (f) and the displacement (s) in the largest hole 1633 is shown. When the resin members filled in the holes 1622 and 1632 are broken, that is, when the displacement reaches S ₂ , the shearing force applied to the holes 1621 and 1633 becomes a value smaller than f ₂ (stress is attenuated), and is a straight line. Increases along 803. When the displacement amount of the resin member in the hole 1621 and hole 1633 has reached the same _{s 3} as in Comparative Example 2, the shearing force applied to the resin member filled in the hole 1621 and hole 1633 is _{f 3,} a resin member The state has a margin for the breaking stress of.

As described above, according to the present embodiment, the resin members filled in the holes 1621 and 1633 have a margin by breaking in order from the farthest point from the point where the impact force acts to absorb the impact force. It can receive an impact force and can improve the impact resistance of the resin member filled in the holes 1621 and 1633.

Further, according to this embodiment, when shear stress is generated, fracture progresses stepwise from a hole having a small diameter, so that the generated stress can be attenuated (EA), and the generated stress on the fiber reinforced plastic frame can be reduced. It became possible to reduce it.

Further, according to this embodiment, by insert molding the metal bracket, it is possible to reduce the number of fastening / joining parts and the number of processing man-hours.

Further, according to this embodiment, since the resin is molded through the metal bracket, it is possible to easily guarantee the adhesive strength in the adhesive bonding.

In the embodiment described above, the configuration in which the same resin member as the seat frame is filled inside the holes having different diameters formed in the metal bracket to alleviate the impact at the time of a rear-end collision has been described, but the metal bracket is formed. The member to be filled in the holes having different diameters is not limited to the same resin member as the seat frame. For example, the metal bracket and the seat frame may be connected through holes having different diameters formed in the metal bracket using bolts having different diameters or rivets having different diameters.

According to this embodiment, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and the impact at the time of a rear-end collision is applied to the fixed portion between the seat frame and the metal bracket. It has become possible to relax.

Further, according to this embodiment, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and the fixed portion between the seat frame and the metal bracket has a cross-sectional area. It has become possible to absorb impact energy by connecting with a plurality of different connecting members and sequentially destroying a plurality of connecting members having different cross-sectional areas at the time of a rear-end collision.
[Modification example]
As a modification of the first embodiment, an example in which the shapes of the holes 1621, 1622, 1623 and the holes 1631, 1632, 1633 are changed will be shown.

FIG. 9 shows an example in which ellipses 2621, 622, 2623 having a major axis in the lateral direction and different sizes are formed on the front bending surface 162 instead of the holes 1621, 1622, 1623. The ellipses are arranged so as to decrease in the order of 2621, 622, 2623, and the same effect as in the case of the first embodiment can be expected.

FIG. 10 shows an example in which ellipses 3621, 3622, and 3623 having minor diameters in the lateral direction and different sizes are formed on the front bending surface 162. The ellipses are arranged in the order of 3621, 3622, 3623, and the same effect as in the case of the first embodiment can be expected.

FIG. 11 shows an example in which ellipses 4621, 4622, and 4623 whose major axis is set in the oblique direction are formed on the front bending surface 162. The ellipses are arranged in the order of 4621, 4622, 4623, and the same effect as in the case of the first embodiment can be expected.

FIG. 12 shows an example in which circles 5621, 5622, and 5623 having different diameters are connected by slits 5624 and 5625 to form a front bent surface 162. The circles are arranged in the order of 5621, 5622, 5623, and the same effect as in the case of the first embodiment can be expected.

FIG. 13 shows an example in which slits 6621, 6622, and 6623 having different lengths are arranged in the vertical direction. The lengths of the slits are arranged so as to be shorter in the order of 6621, 6622, 6623, and the cross-sectional area of the slits is reduced in this order, and the same effect as in the case of the first embodiment can be expected. In the example shown in FIG. 13, the case where the widths of the slits 6621, 6622, and 6623 are the same is shown, but the slits may be formed so that the widths of the slits become narrower in the order of 6621, 6622, 6623. Further, the length of each slit may be the same, and the width dimension may be changed in order.

In the first embodiment, as shown in FIGS. 4 to 7, holes 1621, 1622, 1623 having diameters decreasing in order from the top are formed on the front bending surface 162 of the metal bracket 160, and the rear bending surface 162 is formed. Holes 1631, 1632, 1633 having diameters increasing in order from the top were formed on the surface 163. On the other hand, in this embodiment, as shown in FIGS. 14 and 15, the through-hole row 7620 formed on the front bending surface 762 of the metal bracket 760 and the penetrating hole formed on the rear bending surface 763. The columns 7630 are arranged in the same order.

FIG. 14 shows the appearance of the metal bracket 760 according to this embodiment. The metal bracket 760 has a front bent surface 762 formed in front of the side surface 761 and a rear bent surface 763 formed in the rear, and the end portion of the rear bent surface 763 has a bent portion 764 bent inward at a right angle. It is formed. The hole 7611 formed on the side surface 761 is a hole for attaching to a recliner (not shown).

On the front bending surface 762, holes 7621, 7622, and 7623 whose diameters decrease in order from the top are formed in a row at substantially equal intervals in the vertical direction as hole rows 7620 that penetrate. On the other hand, on the rear bending surface 763, holes 7631, 7632, 7633 having smaller diameters in order from the top are formed in a row at substantially equal intervals in the vertical direction as hole rows 7630 to penetrate.

A side view of the metal bracket 760, which is an arrow view seen from the DD direction in FIG. 14, is shown in FIG. On the front bending surface 762, holes 7621, 7622, and 7623 whose diameters decrease in order from the top are formed in a row at substantially equal intervals in the vertical direction as hole rows 7620 that penetrate. On the other hand, in the rear bent surface 763, holes 7631 and 7632 having smaller diameters in order from the top are formed as hole rows 7630 that penetrate at a position farther from the side surface 761 than the hole rows 7620 that penetrate when viewed from the side surface. , 7633 are formed in a vertical row at substantially equal intervals.

That is, the through hole row 7620 formed on the front bending surface 762 and the penetrating hole row 7630 formed on the rear bending surface 763 are formed in the same arrangement of holes, and the vehicle is hit. When an impact force F ₀ is applied to the seat back frame 150 in the rear direction (to the right in FIG. 3), the center of the hole 7611 attached to the recliner (not shown) which is the fulcrum of the seat back frame 150. Holes 7623 and 7633 having a smaller diameter were arranged closer to each other, and the diameters of the holes 7622 and 7621 and the diameters of the holes 7632 and 7631 increased as the distance from the fulcrum increased.

According to this embodiment, the resin member filled in the holes 7621 and 7631 can receive an impact force with a margin, and the effect is slightly smaller than that in the case of Example 1, but the holes 7621 and 7631 have The impact resistance of the filled resin member can be improved.

Further, according to this embodiment, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and the seat frame and the metal bracket are fixed at the time of a rear-end collision. The impact can now be mitigated.

Further, according to this embodiment, the seat frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and the fixed portion between the seat frame and the metal bracket has a cross-sectional area. It has become possible to absorb impact energy by connecting with a plurality of different connecting members and sequentially destroying a plurality of connecting members having different cross-sectional areas at the time of a rear-end collision.

In Examples 1 and 2, examples of forming the hole rows 1620 and 1630 or 7620 and 7630 penetrating the metal bracket 160 or 760 have been described, but in this embodiment, the hole rows penetrating the metal bracket 160 or 760 are formed. Instead, a plurality of convex portions (embossed portions) having different outer diameters are formed on the metal bracket.

FIG. 16 shows the appearance of the metal bracket 860 in this embodiment in a perspective view. The metal bracket 860 has a front bent surface 862 formed in front of the side surface 861 and a rear bent surface 863 formed in the rear, and the end portion of the rear bent surface 863 has a bent portion 864 bent inward at a right angle. It is formed. The hole 8611 formed on the side surface 861 is a hole for attaching to a recliner (not shown).

On the front bending surface 862, convex portions 8621, 8622, 8623 having smaller outer diameters in order from the top are formed in a row at substantially equal intervals in the vertical direction as a row of convex portions 8620. On the other hand, on the rear bending surface 863, convex portions 8631, 8632, 8633 having larger outer diameters in order from the top are formed in a row at substantially equal intervals in the vertical direction as rows of convex portions 8630.

A cross section of the metal bracket 860 seen from the EE direction in FIG. 16 is shown in FIG. On the front bending surface 862, convex portions 8621, 8622, 8623 having smaller outer diameters in order from the top are formed in a row at substantially equal intervals in the vertical direction as a row of convex portions 8620. On the other hand, although not shown in FIG. 17, on the rear bending surface 863, as the convex portion row 8630, the convex portions 8631, 8632, 8633 whose diameters increase in order from the top are substantially equal to each other in the vertical direction. It is formed at intervals.

That is, the front folding surface 862 which is formed on the column of the convex portion 8620 and the rear folding surface 863 convex portions of the column 8630 formed in, the arrangement of the outer diameter of the convex portion in reverse, pulling force F ₁ The row of convex portions 8620 formed on the front bending surface 862 on which the force acts is formed so that the diameter becomes smaller in order from the top, and the row of the convex portions formed on the rear bending surface 863 on which the compressive force F2 acts. 8630 is the front folding surface 862 pulling force F ₁ acts on the contrary, are formed such that the diameter in this order from top to increase.

That is, in the row of convex portions 8620 formed on the front bending surface 862 on which the tensile force F ₁ acts, the outer diameter of the convex portions decreases as the distance from the point of action of the impact force F ₀ related to the seat back frame 150 increases. It is arranged like this.

On the other hand, in the row of convex portions 8630 formed on the rear bending surface 863 on which the compressive force F2 acts, the diameter of the hole becomes smaller as it approaches the point of action of the impact force F ₀ related to the seat back frame 150. Have been placed.

In the examples shown in FIGS. 16 and 17, the case where the row of convex portions 8620 formed on the front bending surface 862 is formed so as to protrude outward from the front bending surface 862 is shown. , The row of convex portions formed on the front bent surface 862 is shaped so as to protrude inward of the front bent surface 862 (the shape facing the row of convex portions 8630 formed on the rear bent surface 863). It may be formed.

According to this embodiment, the seat back frame on the seat back side and the metal bracket for fastening the recliner are fixed by integral molding with fiber reinforced resin, and when the seat back frame and the metal bracket collide with each other, the metal bracket is fixed. The impact can now be mitigated.

Further, according to this embodiment, a plurality of metal brackets for fastening the seat back frame and the recliner are fixed by integral molding with fiber reinforced resin, and the fixed portions of the seat back frame and the metal bracket have different cross-sectional areas. It has become possible to absorb impact energy by connecting with the connecting members of the above and destroying a plurality of connecting members having different cross-sectional areas at the time of a rear-end collision in order.

100 ... Vehicle seat 110 ... Seat cushion 120 ... Seat back 150 ... Seat back frame 160, 760, 860 ... Metal bracket 1620, 1630, 7620, 7630 ... Penetrating hole row

Claims (15)

A vehicle seat with a seat cushion and a seat back.
The seat back
With a resin seat back frame
It has a metal bracket that is integrally molded with the resin seat back frame and attaches the resin seat back frame to other members.
A plurality of holes having different diameters are arranged in the metal bracket in the order of the size of the diameter, and the resin seat back frame is inside the plurality of holes having different diameters formed in the metal bracket. A vehicle seat characterized by being filled with a resin of the same material as. The vehicle seat according to claim 1, wherein a tensile force is generated on the resin seat back frame when the seat back receives an impact load in the rear direction on the metal bracket. A vehicle seat characterized in that a plurality of holes having different diameters are formed so that the diameters become smaller in order from the top. The vehicle seat according to claim 1, wherein a compressive force is generated on the resin seat back frame when the seat back receives an impact load in the rear direction on the metal bracket. A vehicle seat characterized in that a plurality of holes having different diameters are formed so that the diameters increase in order from the top. The vehicle seat according to any one of claims 1 to 3, wherein the resin seat back frame is made of a fiber reinforced resin. A vehicle seat with a seat cushion and a seat back.
The seat back
With a resin seat back frame
A surface for attaching the resin seat back frame to another member and a front surface formed at a right angle to the surface for attaching the resin seat back frame to the other member in front of the surface for attaching the other member. A metal bracket integrally molded with the resin seat back frame, provided with a rear surface formed at a right angle to the surface for attaching to the other member behind the surface for attaching to the other member. And have
A plurality of holes having a diameter decreasing in order from the top are formed on the front surface of the metal bracket, and a plurality of holes having a diameter increasing in order from the top are formed on the rear surface of the metal bracket. The same material as the resin seat back frame is inside the plurality of holes formed on the front surface of the metal bracket and the plurality of holes formed on the rear surface of the metal bracket. A vehicle seat characterized by being filled with the resin of. The vehicle seat according to claim 5, wherein the plurality of holes formed on the front surface of the metal bracket in which the diameter decreases in order from the top are when the seat back receives an impact load in the rear direction. A vehicle seat characterized by receiving the tensile force generated in the vehicle. The vehicle seat according to claim 5, wherein the plurality of holes formed in the rear surface of the metal bracket in which the diameter increases in order from the top are when the seat back receives an impact load in the rear direction. A vehicle seat characterized by receiving the compressive force generated in the vehicle. The vehicle seat according to any one of claims 5 to 7, wherein the resin seat back frame is made of a fiber reinforced resin. A vehicle seat with a seat cushion and a seat back.
The seat back
With a resin seat back frame
It has a metal bracket that is integrally molded with the resin seat back frame and attaches the resin seat back frame to other members.
On the side where a tensile force is generated on the resin seat back frame when the seat back receives an impact load in the rear direction, the seat back is attached to the metal bracket integrally molded with the resin seat back frame. A plurality of holes whose diameters decrease as the distance from the position where the impact load is applied in the rear direction are formed, and when the seat back receives the impact load in the rear direction, a compressive force is applied to the resin seat back frame. On the generation side, the metal bracket integrally molded with the resin seat back frame is formed with a plurality of holes whose diameters increase as the seat back moves away from the position where the impact load is applied in the rear direction. The resin seat back frame is inside the plurality of holes whose diameter decreases as the distance from the impact load receiving position of the metal bracket increases and the diameter increases as the distance from the impact load receiving position increases. A vehicle seat characterized by being filled with a resin of the same material as. The side of the vehicle seat according to claim 9, wherein a tensile force is generated on the resin seat back frame when the seat back receives an impact load in the rear direction is on the front surface of the seat back. On the near side, the side where the compressive force is generated in the resin seat back frame when the seat back receives an impact load in the rear direction is the side close to the rear surface of the seat back. Vehicle seats to be used. The vehicle seat according to claim 9 or 10, wherein the resin seat back frame is made of a fiber reinforced resin. A vehicle seat with a seat cushion and a seat back.
The seat back
With a resin seat back frame
It has a metal bracket that is insert-molded to the resin seat back frame and attaches the resin seat back frame to another member.
A vehicle characterized in that a plurality of protrusions having different outer diameters are arranged in order of the size of the outer diameter in a portion of the metal bracket that is insert-molded with respect to the resin seat back frame. Sheet for. The vehicle seat according to claim 12, wherein a tensile force is generated on the resin seat back frame when the seat back receives an impact load in the rear direction on the metal bracket. A vehicle seat characterized in that a plurality of protrusions are formed so as to reduce the outer diameter in order from the top. The vehicle seat according to claim 12, wherein a compressive force is generated on the resin seat back frame when the seat back receives an impact load in the rear direction on the metal bracket. A vehicle seat characterized in that a plurality of protrusions are formed so as to increase the outer diameter in order from the top. The vehicle seat according to any one of claims 12 to 14, wherein the resin seat back frame is made of a fiber reinforced resin.

Images