JP2017077801A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of suppressing input to a seat back part during rear-end collision of a vehicle.SOLUTION: In a vehicle seat, left and right side frames constituting a seat back part are joined to a rear end side of left and right cushion frames constituting a seat cushion part via a turning shaft. The seat back part is provided with left and right side frames and a pipe frame. An upper end side of the pipe frame has an upper part projecting above upper ends of the side frames. The upper part of the pipe frame is provided with an operation plate device which is suspended in a back and forth direction so as to be freely turned and turns rearward by receiving a rearward load that acts on a seated person during rear-end collision. Moreover, in the vehicle seat, there are provided load direction changing means provided at a turning shaft, and wires which are stretched over the load direction changing means, one end of which is coupled to the upper part side of the pipe frame and the other end of which is coupled to the operation plate device. When the operation plate device turns rearward, a forward load is made to act on the pipe frame via the wire.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle seat mounted on a vehicle such as an automobile, and in particular, to reduce input to the seat (seat back portion) at the time of a rear collision (force to tilt the seat back portion backward). About.

In vehicle seats such as automobiles, it is important to protect passengers (seaters) at the time of a collision from the rear of a vehicle such as an automobile, that is, a so-called rear collision.
As this kind and a prior art, there exist some which were described in Unexamined-Japanese-Patent No. 10-287164 (patent document 1), for example. In this patent document 1, when the seat back portion is separated into an upper half portion and a lower half portion in advance and the entire seat back portion is tilted backward due to an impact at the rear impact of the vehicle, Accordingly, the upper half of the seat back part and the headrest at the upper end thereof are integrally tilted forward with respect to the lower half of the seat back part. This patent document 1 discloses a vehicular seat that prevents occupants (seaters) from whiplash and the like.

JP-A-10-287164

  In the thing of the said patent document 1, it cannot prevent that the whole seat back part tilts backward by the impact at the time of the rear collision of a vehicle, There was a problem that protection could not be performed sufficiently.

  An object of the present invention is to obtain a vehicle seat that can suppress input to the seat back portion (force to tilt the seat back portion backward) at the time of a rear collision of the vehicle.

  In order to achieve the above-mentioned object, the present invention is for a vehicle in which left and right side frames constituting a seat back portion are connected to rear end sides of left and right cushion frames constituting a seat cushion portion via a rotating shaft. In the seat, the seat back portion includes the left and right side frames and a pipe frame that is connected to the left and right side frames and integrates the left and right side frames, and the pipe frame extends along the side frames. The upper end side of the upper side of the side frame has an upper portion that protrudes upward from the upper end of the side frame, and is suspended from the upper portion of the pipe frame so as to be pivotable in the front-rear direction. A load direction change hand composed of an actuating plate device that receives a load applied to the rear and rotates backward, and a pulley provided on the rotating shaft. And a wire that spans the load direction changing means, one end is coupled to the upper side of the pipe frame, and the other end is coupled to the working plate device, and the working plate device rotates backward. In this case, a forward load is applied to the pipe frame via the wire.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect which can obtain the vehicle seat which can suppress the input (force which tilts back a seat back part) to a seat back part at the time of a vehicle rear-end collision.

It is a perspective view which shows Example 1 of the vehicle seat of this invention, and is a figure which shows the frame structure which removed the right side frame. It is a front view of the vehicle seat shown in FIG. It is a side view of the vehicle seat shown in FIG. FIG. 2 is a side view of the vehicle seat shown in FIG. 1, showing a state in which a seat back portion is inclined rearward. It is a perspective view of the vehicle seat in the state shown in FIG. It is operation | movement explanatory drawing of the vehicle seat in Example 1 of this invention. It is a perspective view which shows Example 2 of the vehicle seat of this invention, and is a figure which shows the frame structure which removed the right side frame. It is a perspective view which shows Example 3 of the vehicle seat of this invention, and is a figure which shows the frame structure which removed the right side frame.

  Hereinafter, specific examples of the vehicle seat of the present invention will be described with reference to the drawings. In each figure, the part which attached | subjected the same code | symbol has shown the part which is the same or it corresponds.

A vehicle seat according to a first embodiment of the present invention will be described with reference to FIGS.
First, the overall configuration of the vehicle seat according to the first embodiment will be described with reference to FIGS. 1 is a perspective view showing a first embodiment of a vehicle seat according to the present invention, showing a frame structure with a right side frame removed, FIG. 2 is a front view of the vehicle seat shown in FIG. 1, and FIG. 4 is a side view of the vehicle seat shown in FIG. 1. FIG. 5 is a view showing a state in which the seat back portion is inclined rearward. FIG. 5 is a vehicle seat in the state shown in FIG. FIG.

  1 to 5, reference numeral 1 denotes a vehicle seat, and the vehicle seat 1 includes a seat back portion 1A and a seat cushion portion 1B. The seat back portion 1 </ b> A includes left and right side frames 2, and the seat cushion portion 1 </ b> B includes left and right cushion frames 3. 1 and 3 to 5 show the state in which the right side frame 2 is removed.

  The seat back portion 1 </ b> A includes a pipe frame 4 that is connected to the left and right side frames 2 and integrates the left and right side frames 2. The pipe frame 4 extends in the vertical direction along the side frame 2, and an upper end side of the pipe frame 4 has an upper portion 4 a protruding upward from the upper end of the side frame 2.

  The left and right side frames 2 constituting the seat back portion 1A are connected to the rear end sides of the left and right cushion frames 3 constituting the seat cushion portion 1B via a rotating shaft 5. As shown in FIGS. 4 and 5, the side frame 2 is configured to be inclined at a predetermined inclination angle with respect to the cushion frame 3 via a reclining mechanism (not shown).

  In this embodiment, the working plate device 6 is suspended from the upper portion 4a of the pipe frame 4 so as to be rotatable in the front-rear direction. The operating plate device 6 is configured to receive a backward load acting on a seated person (occupant) when a rear collision occurs and to rotate backward.

  This configuration will be described in more detail. The actuating plate device 6 is composed of a plate-shaped load receiving portion (acting plate) 6a, a pipe member, and a holder portion 6b to which the load receiving portion 6a is integrally attached. . The holder portion 6b has a portion extending to an upper portion and a portion extending to a lower portion than the load receiving portion 6a, and a wire coupling portion 6c is provided in the portion extending to the lower portion. On the other hand, the pipe frame 4 is provided with a mounting portion (bracket) 7 for mounting the operating plate 6 on a horizontal portion of the upper portion 4a. The operating plate device 6 is suspended from the mounting portion 7 via the holder portion 6b.

  The load receiving portion 6a of the actuating plate device 6 is arranged so as to receive an impact load due to the backward inertial movement of the seated person (a backward load acting on the seated person in the case of the back collision) when a rear collision occurs. When the load exceeds a predetermined value, the working plate device 6 is configured to move (rotate) backward. In addition, a tension structure (not shown) composed of a spring, an elastic body, or the like is stretched between the left and right side frames 2, and the input load during normal use due to the seating of the seated person is as follows. The operation plate device 6 is received by a tension structure, and is not operated (does not move backward).

  In this embodiment, the pivot shaft 5 is provided on each of the left and right cushion frames 3. That is, the left and right cushion frames 3 are provided with shaft support brackets 13 for supporting the plurality of pivot shafts 5, and the pivot shafts 13 and the cushion frames 3 are used to support the pivot shafts. 5 is supported.

  Further, in the present embodiment, pulleys (load direction changing means) 10 are rotatably provided inside the side frames 2 in the respective rotation shafts 5. Further, a pulley (load direction changing means) 9 is attached to the front side of the upper portion 4a of the pipe frame 4 of the seat back portion 1A via a bracket portion 9a.

  Reference numeral 11 denotes a wire. The wire 11 is stretched over the pulley 10, and one end of the wire 11 is coupled to the upper portion 4 a side of the pipe frame 4 via the pulley 9. The other end of the wire 11 is coupled to the wire coupling portion 6 c of the operating plate device 6.

  With this configuration, when a rear collision occurs and the impact load due to the backward inertia movement of the seated person exceeds a predetermined value, the impact load acts on the load receiving portion 6a of the operating plate device 6. The operating plate device 6 is moved backward. Along with this, a large tension is generated in the wire 11 as the working plate device 6 moves backward, and the tension of the wire 11 causes the pulley 9 to move toward the upper part 4a side of the pipe frame 4. A load that is pulled forward is applied.

  Therefore, although an impact load due to backward inertial movement by a seated person acts mainly on the lower side of the seat back portion 1A, at the same time, the upper side of the seat back portion 1A is moved forward by the tension generated in the wire 11. As a result, the seat back portion 1A can be prevented from falling backward.

  An operation in which a forward load acts on the pipe frame 4 via the wire 11 when the working plate device 6 rotates rearward will be described in detail with reference to FIG. FIG. 6 is an operation explanatory view of the vehicle seat in Embodiment 1 of the present invention.

  In FIG. 6, reference numeral 14 denotes a seated person (occupant) sitting on the vehicle seat 1 constituted by the seat back portion 1A and the seat cushion portion 1B. 2 denotes a side frame of the seat back portion 1A, 3 denotes a cushion frame of the seat cushion portion 1B, and 9 and 10 denote upper and lower pulleys (load direction changing means) shown in FIGS. The upper pulley 9 is rotatably supported by the upper portion 4a (see FIG. 1 and the like) of the pipe frame 4 of the seat back portion 1A, and the lower pulley 10 is rotatably supported by the cushion frame 3.

  6 and 6 'are the operation plate devices described above, and the operation plate devices 6 and 6' include load receiving portions 6a and 6a ', holder portions 6b and 6b', and wire coupling portions 6c and 6c ', respectively. 4 Attached to an upper mounting portion (bracket) 7 so as to be swingable in the front-rear direction.

  11, one end is coupled to the upper portion of the pipe frame 4 via the upper pulley 9 and the other end is coupled to the wire coupling portion 6c below the working plate device 6 via the lower pulley 10. The wire is shown.

  A seated person 14 indicated by a solid line indicates a sitting posture in a normal state, and a seated person 14 ′ indicated by a broken line indicates a state in which a rear collision has occurred and the seated person has moved inertially backward. As shown in FIG. 6, when an impact load due to the backward inertial movement of the seated person 14, 14 ′ exceeds a predetermined value when a rear collision occurs, the load acts on the load receiving portion 6 a of the operating plate device 6. As a result, the operating plate device 6 rotates around the mounting portion 7 as indicated by a white arrow and moves rearward as indicated by a broken line 6 ′ (6a ′, 6b ′, 6c ′). To do.

  Along with this, a large tension is generated in the direction indicated by the arrow, and the upper part of the side frame 2 of the seat back portion 1A is pulled forward as indicated by the arrow. Therefore, when a rear collision occurs, a load in the direction of falling backward is generated on the seat back portion 1A due to an impact load due to the inertial movement of the seated person 14, 14 ', but at the same time, on the upper portion of the seat back portion 1A. A force for pulling the seat back portion 1A forward is generated. Accordingly, the backward tilt of the seat back portion 1A can be suppressed, and the seated person can be protected from the impact at the time of the rear collision, so that an effect of preventing or reducing the whip of the seated person can be obtained.

  As the diameter of the lower pulley 10 is increased, the force for pulling the seat back portion 1A forward (the rotational moment about the rotation shaft 5 in the seat back portion 1A) can be increased, and the seat back portion 1A can be increased. It is possible to increase the backward tilt suppressing effect. Therefore, the diameter of the pulley 10 is preferably as large as possible within a range in which buffering with surrounding members can be avoided.

  In the first embodiment described above, the pivot shaft 5 has a plurality of pivots that are rotatably supported via the left and right cushion frames 3 and the shaft support brackets 13 attached to the cushion frames 3, respectively. The pulley 10 is provided on each of the plurality of rotating shafts 5. However, the present invention is not limited to the pivot shaft 5 provided on each of the left and right cushion frames 3. In other words, the pivot shaft 5 may be constituted by a single shaft straddling the left and right cushion frames 3. As described above, when the rotating shaft 5 is constituted by a single shaft, the rotating shaft 5 is rotatably supported by the left and right cushion frames, and the left and right sides of the single rotating shaft 5 are supported. Each of the side frames 2 and the pulley 10 may be provided rotatably. With this configuration, the above-described shaft support bracket 13 can be omitted, and the support of the rotating shaft 5 can be further firmly fixed by the left and right cushion frames 3.

  In addition, although the said Example 1 demonstrated the example which comprised the said load direction change means 9 and 10 using the pulley, the said load direction change means 9 and 10 is not limited to a pulley. Any disk can be used as long as it can guide the wire 11 so that the load caused by the backward rotation of the working plate device 6 can be transmitted to the upper portion of the pipe frame 4 via the wire 11. You may comprise in the shape of a shape or a column shape.

  Next, Example 2 of the vehicle seat of the present invention will be described with reference to FIG. FIG. 7 is a perspective view showing the vehicle seat of the second embodiment, and shows a frame structure with the right side frame removed. In FIG. 7, the portions denoted by the same reference numerals as those in FIGS. 1 to 6 described above indicate the same or corresponding portions, and the description will focus on portions different from the first embodiment.

  In the second embodiment shown in FIG. 7, the upper pulley (load direction changing means) 9 in the first embodiment described above is eliminated, and instead, the pipe frame 4 is fixed to the upper portion 4a of the pipe frame 4 by welding or the like. 4 is provided with a bracket 15 extending downward. Only the upper end side of the bracket 15 is fixed to the pipe frame 4, and the lower part thereof is a free end, and can be bent in the front-rear direction within a range in which the bracket 15 can be deformed. Further, one end of a wire 16 is coupled to the lower end of the bracket 15, and the other end of the wire 16 is connected via a pulley (load direction changing means) 10 that is rotatably supported by the rotation shaft 5. It is coupled to the wire coupling portion 6 c of the operation plate device 6. Other configurations are the same as those of the first embodiment.

Even if comprised in this way, the effect similar to the said Example 1 is acquired. That is, when a rear collision occurs and the impact load due to the backward inertial movement of the seated person exceeds a predetermined value, the impact load acts on the load receiving portion 6a of the operation plate device 6, and the operation plate device 6 is Move backwards. Along with this, a large tension is generated in the wire 16 as the operation plate device 6 is moved backward, and the tension of the wire 16 causes the upper side 4 a of the pipe frame 4 to pass through the bracket 15. A load that is pulled forward acts on. Therefore, it is possible to suppress the seat back portion 1A from falling backward.
Further, according to the second embodiment, since it is not necessary to provide the upper pulley 9 in the first embodiment, the configuration can be further simplified.

  The bracket 15 is not limited to one that bends in the front-rear direction, and may be a highly rigid bracket that hardly bends. Moreover, it replaces with the said bracket 15, and uses a bar material (elongate rod-shaped member), a pipe material, or a board | plate material, the one end side of these members is connected to the upper part 4a side of the said pipe frame 4, and these members are used. One end of the wire 16 may be coupled to the lower portion, and the other end of the wire 16 may be coupled to the operation plate device 6 via the pulley (load direction changing means) 10.

  Next, a third embodiment of the vehicle seat of the present invention will be described with reference to FIG. FIG. 8 is a perspective view showing the vehicle seat of the third embodiment, and shows a frame structure with the right side frame removed. In FIG. 8, the parts denoted by the same reference numerals as those in FIGS. 1 to 7 described above are the same or corresponding parts, and the description will focus on parts different from the first and second embodiments.

  Also in the third embodiment shown in FIG. 8, the upper pulley (load direction changing means) 9 in the first embodiment is abolished as in the second embodiment. Instead, in the third embodiment, as shown in FIG. 8, the hinge portion 17 is attached to the upper portion 4 a of the pipe frame 4, and the bracket 18 rotated in the front-rear direction by the hinge portion 17 is attached to the hinge portion 17. It is attached by means such as welding. Similarly to the second embodiment, one end of the wire 16 is coupled to the lower end of the bracket 18, and the other end of the wire 16 is rotatably supported on the rotating shaft 5 (load direction). It is coupled to the wire coupling portion 6 c of the working plate device 6 via the changing means 10. Other configurations are the same as those in the first or second embodiment.

  Even if it is configured as in the third embodiment, the same effect as in the first embodiment can be obtained. That is, when a rear collision occurs and the impact load due to the backward inertial movement of the seated person exceeds a predetermined value, the impact load acts on the load receiving portion 6a of the operation plate device 6, and the operation plate device 6 is moved backward. Move to. Along with this, a large tension is generated in the wire 16 as the working plate device 6 moves rearward, and the tension that pulls the upper part 4a side of the pipe frame 4 forward through the bracket 18 by the tension. Acts to suppress the seat back portion 1A from falling backward.

  Also in the third embodiment, since it is not necessary to provide the upper pulley 9 in the first embodiment, the configuration can be simplified as in the second embodiment. Further, according to the third embodiment, since the bracket 18 rotates along the direction of the tension generated in the wire 16, the tension generated in the wire 16 can be efficiently transmitted to the upper portion 4a of the pipe frame 4. The effect that can be obtained is also obtained.

  In the third embodiment, as in the second embodiment, instead of the bracket 18, a bar material or a pipe material is used, and one end side of these members is connected to the hinge portion 17. One end of the wire 16 may be coupled to the lower portion of the member, and the other end of the wire 16 may be coupled to the operation plate device 6 via the pulley (load direction changing means) 10.

  The present invention is not limited to the above-described embodiments, and includes various modifications. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

1: vehicle seat, 1A: seat back part, 1B: seat cushion part,
2: side frame, 3: cushion frame,
4: pipe frame, 4a: upper part, 5: rotating shaft,
6: Actuating plate device, 6a, 6a ': Load receiving part (actuating plate),
6b, 6b ': holder part, 6c, 6c': wire coupling part,
7: mounting portion (bracket), 9: pulley (load direction changing means), 9a: bracket portion,
10: pulley (load direction changing means), 11, 16: wire, 13: shaft support bracket,
14, 14 ': Seated person (occupant), 15, 18: Bracket, 17: Hinge part.

Claims (11)

In the vehicle seat in which the left and right side frames constituting the seat back portion are connected to the rear end sides of the left and right cushion frames constituting the seat cushion portion via a rotation shaft,
The seat back portion includes the left and right side frames and a pipe frame that is connected to the left and right side frames and integrates the left and right side frames, and the pipe frame extends in the vertical direction along the side frames. And the upper end side of the side frame has an upper portion protruding upward from the upper end of the side frame, and
An operation plate device that is hung from the upper part of the pipe frame so as to be pivotable in the front-rear direction, and that is pivoted rearward by receiving a rearward load acting on a seated person at the time of a rear collision;
A load direction changing means provided on the rotating shaft;
A wire that spans the load direction changing means, one end is coupled to the upper side of the pipe frame, and the other end is coupled to the working plate device;
When the operation plate device rotates rearward, a forward load is applied to the pipe frame via the wire.   2. The vehicle seat according to claim 1, wherein a load direction changing means is also attached to an upper portion of the pipe frame, and one end of the wire is coupled to the upper portion of the pipe frame via the load direction changing means. A vehicle seat.   The vehicle seat according to claim 1, wherein a bracket fixed to an upper portion of the pipe frame and extending downward along the pipe frame is provided, and one end of the wire is attached to the lower portion of the bracket. Vehicle seat.   2. The vehicle seat according to claim 1, wherein a hinge portion is provided at an upper portion of the pipe frame, a bracket rotated in the front-rear direction by the hinge portion is attached to the hinge portion, and one end of the wire is attached to the lower portion of the bracket. A vehicle seat characterized in that is attached.   5. The vehicle seat according to claim 3, wherein any one of a bar, a pipe, and a plate is used instead of the bracket, and one end of the member is connected to an upper side of the pipe frame. The vehicle seat is characterized in that one end of the wire is attached to the lower part of the member.   The vehicle seat according to any one of claims 1 to 5, wherein the operating plate device is configured in a U shape with a plate-shaped load receiving portion and a pipe material, and the load receiving portion is integrally attached. The pipe frame is provided with an attachment portion for attaching the operation plate device to the upper portion of the pipe frame, and the operation plate device is suspended from the attachment portion via the holder portion. A vehicle seat characterized by the above.   7. The vehicle seat according to claim 6, wherein the holder portion of the operating plate device has a portion extending to a lower portion than the load receiving portion, and the other end of the wire is coupled to the portion extending to the lower portion. A vehicle seat comprising a wire coupling portion for the purpose.   The vehicle seat according to any one of claims 1 to 7, wherein the rotation shaft is rotatably supported via the left and right cushion frames and shaft support brackets attached to the cushion frames. A vehicle seat, comprising: a plurality of rotating shafts, wherein each of the plurality of rotating shafts is provided with the load direction changing means.   The vehicle seat according to any one of claims 1 to 7, wherein the rotation shaft is configured by a single shaft straddling the left and right cushion frames, and the rotation shaft is formed on the left and right cushion frames. A vehicle seat characterized in that the side frame and the load direction changing means are rotatably provided on the left and right sides of the single rotation shaft.   The vehicle seat according to any one of claims 1 to 9, wherein when the rearward load in the longitudinal direction of the vehicle body acting on the seated person at the time of a rear-end collision is a predetermined value or more, the operation plate device is rotated backward. A vehicle seat characterized in that the vehicle seat is configured to move.   The vehicle seat according to any one of claims 1 to 10, wherein the load direction changing means is a pulley.

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