JP5434101B2 - Rotating seat device for vehicle - Google Patents

Description

  The present invention relates to a vehicular rotating seat device, and more particularly, to a vehicular rotating seat device with improved safety performance by improving mechanical strength against a peelable load of a rotatable and movable sheet.

  2. Description of the Related Art In recent years, passenger cars called wagon cars or minivans, which have three rows of front and rear seats and secure a capacity of about 6 to 8 people and have a luggage loading space at the rear, have become widespread. In this type of passenger car, the second row of seats can be rotated forward and backward with respect to the vehicle traveling direction, and the second and third row passengers can be seated face to face as required. There is something that is. Further, many seats are not only rotated but also movable in the vehicle longitudinal direction and the vehicle width direction. Further, the rotating seat is also applied to a care vehicle, and facilitates the passenger to get on and off.

  On the other hand, not only a rotating seat but a vehicle seat is provided with a seat belt that stably holds an occupant on the seat. The upper belt anchor and the lower belt anchor that respectively support the both ends of the seat belt are generally provided on the body frame of the vehicle, but are provided on the rear side of the seat frame in the rotating seat. In the event of a collision, the seat belt is pulled forward with a large tension due to the inertia of the occupant, and a large load is applied to both belt anchors. This load acts in the direction of separating the rear of the seat frame from the floor side. For this reason, it is extremely important in terms of safety performance to secure the mechanical strength against the peeling load of the rotating mechanism and moving mechanism that support the seat frame.

  The rotating seat for automobiles disclosed in Patent Document 1 has an object of effectively ensuring the strength of the seat belt anchor by a simple method, and hooks that can be engaged with the base portion and the rotating portion are provided as solving means. Yes. More specifically, the rotating portion is rotatably supported by the base portion on the floor side, the seat body is fixedly supported by the rotating portion, and a belt anchor fulcrum is set. One of the hooks hangs down from the rotating portion, the other is erected from the base portion, and both hooks are preferably arranged with a certain amount of play. Furthermore, the embodiment discloses an aspect in which a base portion is provided on a slider that moves along a floor-side guide. According to this configuration, both hooks share a part of the upward peeling load applied to the sheet, and the effect of preventing the peeling of the rotating portion is generated, and the normal rotation of the sheet is not hindered.

  Patent Document 2 discloses a structure of a seat belt anchor that can move in the front-rear direction and the width direction of a vehicle. Specifically, the seat includes a front-rear seat slide composed of a lower rail and an upper rail, and a width-direction seat slide provided on the front-rear upper rail and composed of another lower rail and an upper rail. Furthermore, a first plate fixed to the upper rail in the width direction and attached with a belt anchor and a second plate fixed to the upper rail in the front-rear direction are provided, and both plates can always be engaged. According to this configuration, a part of the upward peeling load applied to the sheet is shared by the engagement of both plates, and an effect of preventing the peeling of the upper rail in the width direction is produced.

Japanese Patent Laid-Open No. 9-286263 JP 2004-42696 A

  By the way, the rotating sheet for automobiles of Patent Document 1 is preferable in that a part of the peeling load can be shared by the engagement of both hooks provided in the base part and the rotating part, but the engaging position also changes with the rotation of the sheet. Rotate. Then, since the engagement position moves from directly above the slider holding the base portion, a shearing force is generated in the base portion due to an upward peeling load at the engagement position, and it becomes difficult to ensure mechanical strength. In other words, in order to secure the strength that can withstand this shearing force, it is necessary to form the base portion with a thick member, leading to an increase in the thickness and cost of the apparatus. The peeling load also acts on the slider to try to peel it off from the guide, but the hook does not have a function of preventing the slider from peeling off.

  On the other hand, the sheet of Patent Document 2 can prevent the peeling of the upper rail in the width direction by the engagement of the first plate and the second plate, but this aspect cannot be applied to the prevention of peeling of the rotating sheet. In addition, it is not preferable to provide separate peeling prevention means for each of the two mechanisms with respect to a sheet apparatus including a rotating mechanism and a moving mechanism, because the apparatus is complicated, heavy, and expensive.

  The present invention has been made in view of the above problems, and improves the mechanical performance against the peeling load of a sheet having a rotating mechanism and a moving mechanism to improve safety performance, and further applies to the rotating mechanism and the moving mechanism collectively. An object to be solved is to provide a vehicular rotating seat device including a simple and inexpensive peeling prevention mechanism.

The invention of the rotating seat device for a vehicle according to claim 1 that solves the above-described problem is disposed on the floor side of the vehicle and extends in the longitudinal direction, and is assembled so as to be movable in the longitudinal direction with respect to the lower rail. An upper rail, a rotating disk supported by the rotating disk lower rail on the upper rail so as to be rotatable about a rotation axis, and an upper belt anchor and a lower belt anchor supported by the rotating disk and supporting both ends of the seat belt, respectively. A vehicle seat comprising: a seat frame having a rear side, a load receiving member supported upward by the upper rail by restricting upward movement relative to the upper rail, and a rear side of the seat frame in the turntable Peeling prevention having a hook member provided on the side and engaging with the load receiving member and allowing the rotation of the rotating disk Comprises a structure, the upward peeling load applied to the rotating plate from the rear of the seat frame and shared between the load receiving member and the rotary disc lower rail and the lower rail is extending in the longitudinal direction puncture The load receiving member supported by the upper rail has a long hole provided, and extends downward and can be loosely fitted in the long hole so as to be movable up and down, and then locked to the lower peripheral edge of the long hole. A part of the peeling load applied to the upper rail via the rotating disk is shared by the load receiving member .

  According to a second aspect of the present invention, in the first aspect, the hook member is disposed on the outer peripheral side of the rotating disk lower rail.

According to a third aspect of the present invention, in the vehicle rotating seat device according to the first or second aspect , the load receiving member can be brought into contact with the upper peripheral edge of the elongated hole of the lower rail, or can be integrated or separated. And a part of the downward compressive load applied to the upper rail via the rotating disk is shared by the load receiving member.

According to a fourth aspect of the present invention, in the rotating seat device for a vehicle according to any one of the first to third aspects, the lower rail and the upper rail are arranged in two pairs in front and rear in parallel with the longitudinal direction as the vehicle width direction. The turntable and the seat frame can be rotated halfway forward and backward with respect to the traveling direction of the vehicle, the hook members are provided on the left and right sides of the seat frame on the turntable, and the load receiving member is A total of four pieces are supported at both ends of the front and rear upper rails.

According to a fifth aspect of the present invention, in the vehicle rotating seat device according to the fourth aspect of the present invention, the forward movement of the rotating disk is moved downward by engaging with the two load receiving members not engaged with the hook member. The contact plate member for regulating the movement is provided on the front side of the seat frame on the bottom surface of the rotating disk.

The invention according to claim 6, moves in automotive rotary seat apparatus according to any one of claims 1 to 5, wherein the lower rail is arranged the longitudinal direction as the vehicle width direction, the lower rail in a longitudinal direction of the vehicle A front-rear slide mechanism that supports the front-rear slide mechanism is provided, and the load receiving member is disposed substantially above a supported point of the lower rail supported by the front-rear slide mechanism.

  According to the first aspect of the present invention, the lower rail and the upper rail constitute a moving mechanism, and the rotating disc is supported by the rotating disc supported on the rotating disc lower rail on the upper rail, so that the seat frame can move and rotate. It is like that. Further, the load receiving member erected on the upper rail engages with a hook member provided on the rear side of the bottom surface of the turntable to constitute a peeling prevention mechanism.

  In this configuration, when an excessive load is applied to the seat belt, an upward peeling load that causes the rear of the seat frame and the rotating disk to be separated from the rotating disk lower rail of the upper rail is generated via the upper belt anchor and the lower belt anchor. . At this time, if the rear part of the rotating disk is partially bent to be peeled off, the hook member locks the load receiving member to share a part of the peeling load. On the other hand, in the conventional configuration that does not have the hook member and the load receiving member, it is necessary to bear all of the peeling load with the rotating disk lower rail.

  Therefore, according to the present invention, the peeling load is distributed to the rotating disk lower rail and the load receiving member, and the mechanical strength is improved and the safety performance is enhanced as compared with the conventional case. In addition, since the load receiving member is erected on the upper rail, the load point to which the peeling load is applied and the load point that can withstand the load are arranged without offset in the vertical direction, reducing the shear force and reducing the mechanical strength. Will improve.

Further, the hook member engages with the load receiving member regardless of the rotational position of the rotating disk, and the above-described effect of improving the mechanical strength is produced. It should be noted that the rotation between the hook member and the load receiving member is allowed at any time when no peeling load is generated, and does not hinder the rotation of the rotating disk.
Further, the lower rail has a long hole, and the load receiving member supported by the upper rail can be loosely fitted in the long hole and then locked to the lower peripheral edge of the long hole. The upward peeling load generated on the rotating disk is transmitted to the upper rail and acts in the direction of peeling the upper rail from the lower rail. When the upper rail tries to move upward, the load receiving member is locked to the lower peripheral edge of the elongated hole, and part of the peeling load is shared to prevent the upper rail from peeling. In the conventional configuration, the peeling load is borne by the assembly portions of both rails, but in this aspect, the peeling load is dispersed and the mechanical strength is improved. Further, the load receiving member is also used for preventing the peeling of the turntable and the upper rail, and has a simple and inexpensive structure. It should be noted that the load receiving member is not locked in the elongated hole and does not hinder the movement of the upper rail at all times when no peeling load is generated.

  According to the invention which concerns on Claim 2, the hook member is arrange | positioned rather than the rotary disk lower rail at the outer peripheral side. Therefore, a part of the load that opposes the peeling load can be supported on the outer peripheral side of the rotating disk lower rail, which is advantageous in terms of moment and improves the mechanical strength.

According to the third aspect of the present invention, the load receiving member has an integral or separate step portion that can be brought into contact with the upper peripheral edge of the elongated hole of the lower rail. A downward compressive load may be generated on the rotating disk. This compressive load is transmitted to the upper rail and acts in the direction of pressing the upper rail against the lower rail. When the upper rail tries to move downward, the stepped portion of the load receiving member is locked to the upper peripheral edge of the elongated hole, and a part of the compressive load is shared to prevent compressive deformation of the upper rail. In the conventional configuration, the compressive load is borne by the upper rail moving wheel and the sliding member. However, in this aspect, the compressive load is dispersed and the mechanical strength is improved. The load receiving member is also used for preventing compression deformation of the rotating disk and the upper rail, and has a simple and inexpensive configuration. It should be noted that the load receiving member is not locked in the long hole and does not hinder the movement of the upper rail at any time when no compressive load is generated.

According to the invention of claim 4 , the lower rail and the upper rail are arranged in two sets in front and rear in parallel to the vehicle width direction, the rotating disk and the seat frame can be rotated halfway forward and rearward with respect to the vehicle traveling direction, and the hook member is A total of four load receiving members are supported at both ends of the front and rear upper rails, provided on the left and right sides of the rear side of the turntable. In this aspect, the left and right hook members on the rear side of the turntable engage with the load receiving member of the upper rail on the rear side of the vehicle when facing forward, and engage with the load receiving member of the upper rail on the front side of the vehicle when facing rear. Therefore, even if the turntable and the toe frame are either forward or backward, an effect of sharing the peeling load between the hook member and the load receiving member is produced.

According to the invention which concerns on Claim 5 , an arc-shaped contact plate member is provided in the front side of the bottom face of a turntable. The contact plate member is engaged with two load receiving members that are not engaged with the hook member to restrict the downward movement of the front side of the rotating disk. Therefore, a part of the peeling load is shared by the hook member and the load receiving member on the rear side of the seat frame, and a part of the compressive load is shared by the contact plate member and the load receiving member on the front side. Assuming that a collision accident occurs, the seat belt is pulled with a large tension due to the inertia of the occupant, a large load is applied to both belt anchors, and a large peeling load is generated on the rear side of the seat frame. On the other hand, a compressive load is generated on the front side of the seat frame. According to this aspect, it is possible to disperse the peeling load on the rear side of the rotating disk and to disperse the compressive load on the front side to improve the mechanical strength, and to have extremely high safety performance.

According to the invention which concerns on Claim 6, it has the front-and-rear slide mechanism which supports the lower rail arrange | positioned in the vehicle width direction so that a movement in the vehicle front-back direction is possible, and it is a load substantially above the supported point of the lower rail which a front-rear slide mechanism supports. A receiving member is disposed. The present invention can be applied to a seat that is movable not only in rotation but also in the vehicle width direction and the vehicle longitudinal direction. In addition, by placing the load receiving member almost above the supported point of the lower rail, the load point to which the peeling load is applied and the load point on the floor that can withstand the load can be arranged in the vertical direction without offset, and the bending moment Is reduced, and the mechanical strength is further improved.

It is a perspective view explaining the whole structure of the rotation seat device for vehicles of the embodiment of the present invention. It is a disassembled perspective view of the range which remove | excluded the seat frame from the rotating seat apparatus for vehicles of FIG. It is a top view of the range which remove | excluded the seat frame from the rotating seat apparatus for vehicles of FIG. FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3 for explaining a peeling prevention mechanism of the vehicle rotating seat device of FIG. 1. FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 3 for explaining a compression deformation preventing mechanism of the vehicle rotating seat device in FIG. 1. FIG. 2 is a rear view of a range excluding a seat frame from the vehicle rotating seat device of FIG. 1.

  The form for implementing this invention is demonstrated with reference to FIGS. FIG. 1 is a perspective view illustrating the overall configuration of a vehicular rotating seat device 1 according to an embodiment of the present invention. The vehicular rotating seat device 1 includes a front / rear slide mechanism 2, a second lower rail 3, a second upper rail 4, a rotating disk 5, a seat frame 6, a separation preventing mechanism 7, and a compression deformation preventing mechanism 8. 2 is an exploded perspective view of a range in which the seat frame 6 is removed from the vehicle rotary seat device 1, and FIG. 3 is a plan view of the same range.

  The front / rear slide mechanism 2 is a mechanism that slides the seat frame 6 in the front / rear direction of the vehicle. As shown in FIGS. 2 and 3, the front / rear slide mechanism 2 is fixed to the vehicle floor 91 and is movable to the upper side of the pair of left and right first lower rails 21 that extend in the vehicle front-rear direction and the first lower rails 21. And a pair of left and right first upper rails 22 supported by the right and left sides. Slits 25 and 26 are formed on the upper sides of the first upper rails 22 near the front end 23 and the rear end 24, respectively.

  A pair of front and rear mounting brackets 31 are spanned in parallel between the left and right first upper rails 22. Each mounting bracket 31 includes a rail placement portion 32 that is horizontally disposed, and flange portions 33 and 34 that are formed in parallel by bending the front and rear of the rail placement portion 32 downward. Both ends of 34 are engaged portions 35. The engaging portion 35 of the front mounting bracket 31 is engaged and fixed to the front end 23 and the slit 25 of the first upper rail 22. Similarly, the engaging portion 35 of the rear mounting bracket 31 is fixed to the first upper rail 22. The rear end 24 and the slit 26 are engaged and fixed. The engaging portion 35 corresponds to a supported point supported by the front / rear slide mechanism 2.

  The second lower rail 3 is fixed on the upper side of the rail mounting portion 32 of each mounting bracket 31, and a pair of front and rear is arranged in parallel with the longitudinal direction as the vehicle width direction. Long holes 37 extending in the longitudinal direction are formed in two places near the both ends of each second lower rail 3 and a total of four places in the front and rear, and the rail mounting of each mounting bracket 31 so as to overlap with the long holes 37. Long holes 38 are also drilled in a total of four locations near both ends of the portion 32.

  The second upper rails 4 are respectively provided on the upper sides of the front and rear second lower rails 3 and are assembled so as to be movable in the longitudinal direction by a sliding portion (not shown). The second upper rail 4 is paired with the second lower rail 3 and constitutes a lateral slide mechanism that slides the seat frame 6 in the vehicle width direction, that is, in the lateral direction. Pin holes 45 are drilled in two locations near both ends of each second upper rail 4, and a total of four locations in the front and rear. In addition, attachment holes 41 are formed in two places closer to the center of each second upper rail 4 and a total of four places in the front and rear. A substantially annular rotating disk lower rail 51 is disposed on the upper side of the second upper rail 4, and is fixed to the four mounting holes 41 using bolts 42. As will be described in detail later, the turntable lower rail 51 supports the turntable 5 in a rotatable manner.

  The turntable 5 is formed in a substantially annular shape, and a hole at the center thereof is supported on the turntable lower rail 51. A lock release lever 52 is provided in front of the turntable 5, and a lock mechanism (not shown) is operated to allow and prohibit the turn of the turntable 5 so that it is locked at a predetermined forward position or a rearward position. It has become. Attachment holes 54 are formed at eight locations near the outer edge of the turntable 5, and the seat frame 6 is fixed on the upper side of the turntable 5 using the attachment holes 54. Therefore, the turntable 5 and the seat frame 6 rotate integrally. When the turntable 5 and the seat frame 6 are facing forward, the front of both 5 and 6 coincides with the front side of the vehicle, and when the turntable 5 and the seat frame 6 are facing rearward, the front of both 5 and 6 is the rear of the vehicle. Matches the side and reverses.

  As shown in FIG. 1, the seat frame 6 includes a seat cushion frame 61 fixed to the turntable 5, and a seat back frame 62 rotatably supported on the rear end of the seat cushion frame 61. ing. Lower belt anchors 63 and 64 are fixed to the left and right of the seat cushion frame 61, and an upper belt anchor 65 is fixed to the upper left side of the seat back frame 62 (upper right front side in FIG. 1). A waist belt (not shown) is bridged between the left and right lower belt anchors 63, 64, and a shoulder belt (not shown) is stretched between the lower belt anchor 63 and the upper belt anchor 65 so as to be stretchable. The occupant can be held stably.

  Furthermore, the vehicular rotating seat device 1 of the present embodiment includes a peeling prevention mechanism 7 that prevents the turntable 5 and the second upper rail 4 from being peeled, and a compression deformation prevention that prevents compression deformation of the turntable 5 and the second upper rail 4. And a mechanism 8. 4 is a cross-sectional view taken along the line AA in FIG. 3 for explaining the peeling prevention mechanism 7, and FIG. 5 is a cross-sectional view taken along the line BB in FIG. 3 for explaining the compression deformation prevention mechanism 8.

  Prior to the description of the peeling prevention mechanism 7 and the compression deformation prevention mechanism 8, a detailed structure in which the second upper rail 4 supports the rotating disk 5 will be described with reference to FIGS. The substantially annular rotating disk lower rail 51 is bent concentrically as shown in the figure, and in order from the inner peripheral side, a horizontal bottom wall portion 511, a side wall portion 512 bent upward, and a ceiling bent upward and outward. A wall portion 513 and a flange wall portion 514 bent downward are formed. A mounting hole 53 is formed in the bottom wall portion 511 of the rotary disk lower rail 51 at a position overlapping the mounting hole 41 of the second upper rail 4. Bolts 42 are inserted into the mounting holes 53 of the rotary disk lower rail 51 and the mounting holes 41 of the second upper rail 4 from below, and the barbed nuts 43 are screwed from above, so that both members 51 and 4 are fastened together. Yes.

  The turntable 5 is configured by a substantially annular turntable first upper rail 55 and a turntable second upper rail 56 which are stacked on top and bottom and pressed against each other at the outer periphery. The inner periphery of the turntable first upper rail 55 is a first sliding portion 57 and is disposed on the upper side of the top wall portion 513 of the turntable lower rail 51. The inner circumference of the turntable second upper rail 56 is bent concentrically, bent downward, then bent inward, and further bent inward from above to form a second sliding portion 58. It is disposed below the top wall 513 of the panel lower rail 51. Rolling members 59 are disposed between the first sliding portion 57 and the top wall portion 513 and between the top wall portion 513 and the second sliding portion 58, respectively, so that the rotating disk 5 is rotated. It comes to move.

As shown in FIGS. 2 and 3, the peeling prevention mechanism 7 includes load retaining pins 71 respectively supported by the four pin holes 45 of the second upper rail 4, and left and right rear sides of the bottom surface of the rotating disk 5. It is composed of two hook members 77 provided and various members. The load retaining pin 71 corresponds to a load receiving member and is also shared by the compression deformation preventing mechanism 8. As shown in FIGS. 4 and 5, the load retaining pin 71 includes, in order from the top, a pin head 711 with a large diameter, a pin neck 712 with a reduced diameter, a contact part 713 with a larger diameter, A long shaft portion 714 with a reduced diameter and a lower end male screw portion 715 with a further reduced diameter to form a male screw are formed. The load retaining pin 71 is inserted into the pin hole 45 of the second upper rail 4 from the upper side, and the contact portion 713 contacts the upper surface of the second upper rail 4 so that the downward movement is restricted.

  The shaft portion 714 of the load retaining pin 71 passes through the second upper rail 4 and is loosely fitted into the long hole 37 of the second lower rail 3 and the long hole 38 of the mounting bracket 31. A hooked nut 72 is screwed into the lower end male screw portion 715 from below, and the hooked nut 72 can be locked to the lower peripheral edge of the elongated hole 38 of the mounting bracket 31. In other words, the hooked nut 72 is always disposed with a slight gap with respect to the elongated hole 38 of the mounting bracket 31 so that the movement of the second upper rail 4 is not hindered, and the load retaining pin 71 is directed upward. This gap disappears when a peeling load is applied, and the upward movement of the load retaining pin 71 is restricted. In addition, a separate cylindrical collar 73 is fitted on the outer periphery of the shaft portion 714 of the load retaining pin 71, and the lower end surface 731 of the collar 73 is in contact with the upper peripheral edge of the elongated hole 37 of the second lower rail 3. The upper end surface 732 is in contact with the upper rail 4. The collar 73 may be replaced with a stepped portion integrated with the shaft portion 714 without being separated.

  On the other hand, the hook member 77 is formed in an arc shape around the rotation axis of the rotating disk 5 as shown in FIGS. 2 and 3, and the rotating disk second upper rail of the rotating disk 5 as shown in FIG. 56 is fixed below. The hook member 77 has a radial cross section that opens downward, and the opening is narrowed to form a pull-up portion 78. The pull-up portion 78 is always engaged with the pin neck portion 712 of the load retaining pin 71 with a slight clearance so as not to prevent the rotation of the turntable 5 and is directed upward to the hook member 77. This gap disappears when a peeling load is applied, and the lifting portion 78 locks and lifts the pin head 711 of the load retaining pin 71.

  As shown in FIGS. 2 and 3, the compression deformation prevention mechanism 8 includes the load retaining pin 71 described above, the two contact plate members 81 provided on the front left and right sides of the bottom surface of the rotating disk 5, It is comprised by the member. As for the load retaining pin 71, the hooked nut 72 and the collar 73 that are used in combination are also shared, and a description thereof will be omitted.

  As shown in FIGS. 2 and 3, the contact plate member 81 is formed in an arc shape on the same circumference as the hook member 77 around the rotation axis of the turntable 5, as shown in FIG. The rotating disk 5 is fixed below the rotating disk second upper rail 55. The cross section in the radial direction of the contact plate member 81 is shaped to open upward, and the lower side of the intermediate flat portion is the contact surface 82. The contact surface 82 is always disposed above the pin head 711 of the load retaining pin 71 with a slight clearance so as not to prevent the rotation of the rotating disk 5, and the contact plate member When a downward compressive load is applied to 81, this gap disappears, and the contact surface 82 comes into contact with the pin head 711 of the load retaining pin 71.

  Next, the operation and action of the vehicular rotating seat device 1 of the embodiment configured as described above will be described. First, in the front / rear slide mechanism 2, when the first upper rail 22 slides on the first lower rail 21 in the vehicle front-rear direction, the second lower rail 3, the second upper rail 4, the turntable 5, and the seat frame 6 are aligned in the front-rear direction. Moving. Next, when the second upper rail 4 moves on the second lower rail 3 in the vehicle width direction, the turntable 5 and the seat frame 6 move integrally in the vehicle width direction.

  Further, when the lock mechanism is released by operating the lock release lever 52, the turntable 5 and the seat frame 6 integrally rotate with respect to the turntable lower rail 41 of the second upper rail 4 to rotate in a predetermined forward or backward direction. When the position is reached, the locking mechanism operates to lock further rotation. When the turntable 5 and the seat frame 6 are facing forward, the hook member 77 on the rear side of the turntable 5 is engaged with the load retaining pin 71 of the second upper rail 4 on the rear side of the vehicle, and the front side of the turntable 5 is applied. The plate member 81 engages with the load retaining pin 71 of the second upper rail 4 on the front side of the vehicle. When the turntable 5 and the seat frame 6 are facing rearward, the positions of the hook member 77 and the contact plate member 81 are interchanged, and each engages with a load retaining pin 71 that is different from that when facing forward.

  Here, when the turntable 5 and the seat frame 6 are facing forward, and the occupant is seated on the seat cushion provided on the seat frame 6 and held by the waist belt and the shoulder belt, a collision accident occurs on the front side of the vehicle during forward traveling. Assume that this occurs. At this time, the vehicle speed is reduced impactively, and the belt is pulled by a large impact load toward the front of the vehicle due to the inertia of the occupant, and this impact load is intensively applied to each belt anchor 63, 64, 65. The belt anchors 63, 64, 65 are provided on the rear side of the seat frame 6, and the impact load acts as an upward peeling load for peeling the rear of the rotating disk 5 and the seat frame 6 from the floor 91 side. . Further, it is assumed that not only the peeling load but also a compressive load that causes the front of the turntable 5 and the seat frame 6 to be compressed and deformed toward the floor 91 is generated.

When the rear part of the turntable 5 to which the peeling load is applied is partially bent and is to be peeled off, the hook member 77 moves upward and engages with the pin head 711 of the load retaining pin 71 and pulls it up. The load retaining pin 71 to be moved upward has a hooked nut 72 screwed to the lower end male threaded portion 715 engaged with the lower peripheral edge of the elongated hole 38 of the mounting bracket 31 so that a part of the peeling load is obtained. to share the load. On the other hand, when the front part of the rotating disk 5 to which a compressive load is applied is partially compressed and deformed, the contact plate member 81 moves downward and comes into contact with the load retaining pin 71. The load retaining pin 71 to be moved downward is pressed against the upper surface of the second upper rail 4 to share a part of the compressive load. Therefore, not all of the peeling load and the compressive load applied to the rotating disk are borne by the rotating disk lower rail 51, but are distributed and borne, thereby improving the mechanical strength and improving the safety performance. Further, since the load retaining pin 71 is supported by the second upper rail 4, the load point to which the peeling load and the compressive load are applied and the load point that bears the load are arranged in the vertical direction without offset, and the shearing force is reduced. As a result, the mechanical strength is improved.

  Further, the hook member 77 is disposed on the outer peripheral side of the rotating disk lower rail 51, and a part of the load that opposes the peeling load can be supported by the load retaining pin 71 on the outer peripheral side of the rotating disk lower rail 51. This is advantageous in terms of moment. Therefore, the mechanical strength is improved and the turntable 5 is not easily deformed.

  Further, a part of the peeling load applied to the second upper rail 4 through the rotating disk 5 tries to move the contact portion 713 of the load retaining pin 71 upward, and is shared by the hooked nut 72. Therefore, the peeling load applied to the assembly portion of the second lower rail 3 and the second upper rail 4 on the rear side of the vehicle is reduced, and the peeling of the second upper rail 4 can be prevented. Further, a part of the compressive load applied to the second upper rail 4 via the rotating disk 5 is shared by the collar 73 of the load retaining pin 71. Therefore, the compressive load applied to the sliding portion between the second lower rail 3 and the second upper rail 4 on the vehicle front side is reduced, and compressive deformation of the sliding member or the like can be prevented.

  Further, as shown in FIG. 6, the load retaining pin 71 is disposed substantially above the engaging portion 35 of the mounting bracket 31 supported by the front / rear slide mechanism 2. FIG. 6 is a back view of a range in which the seat frame 6 is removed from the vehicular rotating seat device 1 and shows a state in which the second upper rail 4 has moved to the leftmost in the drawing. In FIG. 6, the engaging portion 35 of the mounting bracket 31 is disposed almost directly above the first upper rail 22 of the front / rear slide mechanism 2. Further, a load retaining pin 71 on the left side in the figure is arranged substantially immediately above the engagement part 35 on the left side in the figure. When the second upper rail 4 moves to the right, the load retaining pin 71 moves to the right in the long hole 37 of the lower rail 3 and the long hole 38 of the mounting bracket 31. A load retaining pin 71 on the right side in the drawing is arranged almost immediately above the portion 35. When the second upper rail 4 moves to the center, the left and right load retaining pins 71 in FIG. In this way, the load point to which the peeling load or compressive load is applied and the load point on the floor that can withstand the load can be arranged in the vertical direction with almost no offset, so the bending moment is reduced and the mechanical strength is further increased. improves.

  Next, it is assumed that a rear-end collision accident occurs on the rear side of the vehicle with the turntable 5 and the seat frame 6 facing forward and the occupant being held by the seat belt. At this time, the vehicle speed increases shockingly, and the occupant is pressed against the seat back by its own inertia. The impact load at this time is borne by the entire seat frame 6, and no particularly large load is generated in each belt anchor 63, 64, 65. Therefore, as compared with the case of a collision accident on the front side of the vehicle, the peeling load and the compressive load generated on the turntable 5 are small. At this time, the load sharing effect by the load retaining pin 71 does not occur, but the mechanical strength is sufficiently maintained because the load itself is small.

  Next, it is assumed that the turntable 5 and the seat frame 6 are facing backward. In this case, it can be considered that the entire vehicular rotating seat device 1 is disposed in the reverse direction with respect to the vehicle. Therefore, the separation load sharing effect by the load retaining pin 71 is produced for a rear-end collision accident to the vehicle rear side.

  After all, in the present embodiment, the peeling load applied to the rotating disk 5 is applied to the load retaining pin for an accident in which an impact load in the direction of pulling out the seat belt is generated regardless of whether the rotating disk 5 and the seat frame 6 are facing forward or backward. 71 and the hook member 77 share the mechanical strength to improve safety performance. Further, the mechanical strength against the compressive load can be improved by adding the contact plate member 81.

  Further, since the hook member 77 and the contact plate member 81 are formed in an arc shape, the engagement with the load retaining pin 71 is maintained even if an error occurs in the rotation position of the turntable 5, and the above-described effect is produced. . In addition, there is no restriction | limiting in the length of the arc direction of the hook member 77 and the contact plate member 81, and the number is not limited to two on either side, For example, it is good also as a single material which connected right and left.

  Further, since the hook member 77 and the contact plate member 81 are disposed on the same circumference and the load retaining pin 71 is shared, the structure is simplified, the number of parts is reduced, and the structure is inexpensive. Yes.

1: Vehicle rotating seat device 2: Front and rear slide mechanism 21: First lower rail 22: First upper rail 22
23: Front end 24: Rear end 25, 26: Slit 3: Second lower rail 31: Mounting bracket 32: Rail mounting portion 33, 34: Flange portion 35: Engaging portion (supported point) 37: Slotted hole 38: Long Hole 4: Second upper rail 41: Mounting hole 42: Bolt 43: Nut with nut 45: Pin hole 5: Turntable 51: Turntable lower rail 513: Top wall 52: Lock release lever 53: Mounting hole 54: Mounting hole 55 : Turntable first upper rail
56: rotating disk second upper rail 57: first sliding portion 58: second sliding portion 59: rolling member 6: seat frame 61: seat cushion frame 62: seat back frame 63, 64: lower belt anchor 65: upper Belt anchor 7: peeling prevention mechanism 71: load retaining pin (load receiving member) 72: hook nut 73: collar 77: hook member 78: lifting portion 8: compression deformation preventing mechanism 81: contact plate member 82: contact Surface 91: Vehicle floor

Claims (6)

A lower rail disposed on the vehicle floor side and extending in the longitudinal direction, an upper rail assembled to the lower rail so as to be movable in the longitudinal direction, and rotating about a pivot axis to a rotating disk lower rail on the upper rail In a vehicular rotating seat device comprising: a rotatable disc that is supported, and a seat frame that is supported by the rotatable disc and has an upper belt anchor and a lower belt anchor on the rear side that respectively support both ends of the seat belt.
A load receiving member that is supported upward by the upper rail while restricting upward movement with respect to the upper rail, and is provided on the rear side of the seat frame in the rotating disk and allows the rotation of the load receiving member and the rotating disk. It includes a separation prevention mechanism having a hook member for engaging with, an upward peeling load applied from the rear of the seat frame to the rotating disk is shared between the load receiving member and the rotary disc lower rail, and,
The lower rail has a long hole extending in the longitudinal direction, and the load receiving member supported by the upper rail extends downward and is loosely fitted in the long hole so as to be vertically movable. The vehicle is characterized in that it can be locked to the lower peripheral edge of the elongated hole and a part of the peeling load applied to the upper rail via the rotating disk is shared by the load receiving member . Rotating sheet device. The vehicular rotating seat device according to claim 1,
The vehicular rotating seat device, wherein the hook member is disposed on an outer peripheral side of the rotating disc lower rail. The vehicle rotating seat device according to claim 1 or 2 ,
The load receiving member has an integral or separate stepped portion which can be brought into contact with the upper peripheral edge of the elongated hole of the lower rail, and is one of the downward compressive loads applied to the upper rail via the rotating disk. A rotating seat device for a vehicle, wherein the portion is shared by the load receiving member. In the vehicle rotating seat device according to any one of claims 1 to 3 ,
The lower rail and the upper rail are arranged in two front and rear in parallel with the longitudinal direction as the vehicle width direction, and the rotating disk and the seat frame can be rotated halfway forward and rearward with respect to the vehicle traveling direction, and the hook member Is provided on the left and right sides of the rotating frame on the rear side of the seat frame, and a total of four load receiving members are supported at both ends of the front and rear upper rails. The vehicle rotating seat device according to claim 4 ,
A contact plate member that engages with the two load receiving members that do not engage with the hook member and restricts the downward movement of the front side of the turntable is provided on the front side of the seat frame on the bottom surface of the turntable. A rotating seat device for a vehicle. In the vehicle rotating seat device according to any one of claims 1 to 5 ,
The lower rail is arranged with its longitudinal direction as the vehicle width direction, and includes a front and rear slide mechanism that supports the lower rail so as to be movable in the vehicle front-rear direction, and is substantially above the supported point of the lower rail supported by the front and rear slide mechanism. A rotating seat device for a vehicle, wherein a load receiving member is disposed.

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