JP2012236476A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispose a guide member that protects a connecting rod for coupling the operation shafts of a reclining device so that its high structural strength may be demonstrated under the use environment of a seat back.SOLUTION: A vehicular seat 1, which includes the connecting rod 6 that couples the operation shafts 5H, 5H that carry out the unlocking operation of respective reclining devices 5, 5 provided on both right and left sides of a seat back 2, has the guide member 7 of an elongated shape that is laid between both the right and left side frames 2F1, 2F1 of the seat back 2 to cover and protect the connecting rod 6 from its outer circumference. The guide member 7 encloses the connecting rod 6 respectively from the top, front, and bottom of the seat, formed in the shape of an open cross-section including an opening part 7A in the rear of the seat.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat including a connecting rod that connects operation shafts that perform unlocking operations of the reclining devices provided on the left and right side portions of the seat back.

  Conventionally, in vehicle seats, the lower end portions of the left and right sides of the seat back are respectively connected to the seat cushion via a reclining device, and the backrest angle can be adjusted by the lock / release switching operation of each reclining device. Those configured to be fixed or adjustable are known. Here, in Patent Document 1, the operation shafts inserted through the shaft centers of the reclining devices are integrally connected to each other by a connecting rod in order to synchronize the switching operation of the locking and release of the reclining devices. An arrangement is disclosed. The connecting rod extends in the seat width direction in the seat back, and is arranged in a state that can interfere with the cushion pad. Therefore, in the vehicle seat described in Patent Document 1, the outer periphery of the connecting rod is surrounded over the entire length between the left and right side frames of the seat back in order to avoid interference between the connecting rod and the cushion pad. A long guide member having a C-shaped cross section is coupled.

JP 2006-290222 A

  The opening having a C-shaped cross section of the guide member described in Patent Document 1 forms an assembling space for allowing the connecting rod to be assembled in a later process. The upper opening is provided. Therefore, the guide member in the opening direction is easily deformed by a load action from the front side applied to the seat back, and has a structure that is not sufficient as structural strength. The present invention was devised to solve the above problems, and the problem to be solved by the present invention is to arrange the guide member so as to exhibit high structural strength under the use environment of the seat back. There is to do.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
1st invention is a vehicle seat provided with the connecting rod which connects the operating shafts which perform operation of unlocking of each reclining device provided in the right and left both sides of a seat back, and both right and left of a seat back A long guide member is provided between the side frames to cover and protect the connecting rod from the outer peripheral side. The guide member covers the connecting rod from the upper side of the seat, the front side of the seat, and the lower side of the seat, and an opening that forms an external work space for connecting the connecting rod to the operation shaft of each reclining device on the rear side of the seat It is formed in the open cross-sectional shape which has.

  According to the first aspect of the invention, the connecting rod can be connected to the operation shaft of each reclining device in a state where the outer periphery is covered with the guide member by the opening formed in the guide member. The guide member has a configuration in which the opening direction of the opening portion is set to the seat rear side, so that a strong supporting strength can be exerted against the load received from the seat upper side, the seat front side, and the seat lower side. It becomes. Therefore, the state in which the guide member can exert a strong supporting force against the backrest load of the seated occupant on the seat back and the pressing loads from the front side and the lower side of the cushion pad accompanying the tension of the skin material. It becomes. In this manner, the guide member can be disposed so as to exhibit a high structural strength under the usage environment of the seat back.

  According to a second invention, in the first invention described above, the opening is formed so as to open wider than the diameter of the connecting rod so that the connecting rod can be inserted from the outside.

  According to the second aspect of the invention, since the opening is formed so as to open wider than the diameter of the connecting rod, the connecting rod can be assembled from the opening in a subsequent process. Accordingly, the connecting rod may be assembled before or after the guide member.

  According to a third invention, in the first or second invention described above, the guide member is formed in a C-shaped cross section and a round cross-sectional shape as a whole.

  According to the third aspect of the present invention, the guide member is formed in a C-shaped cross section and has a round cross-sectional shape, so that no edge is generated in a portion other than the opening of the guide member, and the cushion pad becomes the guide member. It becomes difficult to get caught. Further, since the contact between the back of the seated occupant leaning on the seat back and the guide member is eased, the seating feeling can be improved.

1 is a perspective view illustrating a configuration of a vehicle seat according to a first embodiment. It is the perspective view which expanded and represented the guide member single-piece | unit. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is sectional drawing which showed the cross-sectional shape of the guide member of another Example.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the vehicle seat 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat 1 of the present embodiment includes a seat back 2 that serves as a backrest for a seated occupant and a seat cushion 3 that serves as a seating portion. The seat back 2 is configured such that the lower end portions of the left and right sides of the seat back frame 2F constituting the skeleton of the seat cushion 3 are interposed via reclining devices 5 and 5 that function as rotation shaft devices capable of stopping rotation. It is connected to the rear end portions of the left and right sides of the seat cushion frame 3F constituting the skeleton. Each of the reclining devices 5 and 5 is normally held in a locked state in which the backrest angle of the seat back 2 is fixed, and is operated by pulling up the release lever 4 provided on the side of the seat cushion 3 outside the vehicle. These lock states are released all at once, and the seat back 2 can be switched to a state in which the backrest angle can be changed.

  Here, each of the reclining devices 5 and 5 is formed in a substantially disc shape, and the unlocking switching operation is performed by the shaft rotation operation of the operation shafts 5H and 5H inserted through the shaft centers thereof. It has come to be. The specific configuration of these reclining devices 5 and 5 will be described later. The operation shafts 5H and 5H described above are integrally connected to each other by a long connecting rod 6 made of a steel pipe material, and the above-described operation shaft 5H arranged on the outer side of the vehicle has an end portion described above. The release lever 4 is integrally connected. Accordingly, the operation shafts 5H and 5H are held in a locked state in which the reclining devices 5 and 5 are stopped from rotating at all times before the release lever 4 is pulled up. The operation shafts 5H and 5H are operated to rotate together through the connecting rod 6 as the release lever 4 is pulled up, and the reclining devices 5 and 5 are locked (rotation stopped). ) Are released all at once. Further, the operation shafts 5H and 5H are returned to the original locked state (rotation stopped state) by energizing by releasing the lifting operation of the release lever 4 described above, and the backrest of the seat back 2 is restored. The angle is returned to the original fixed state.

  The connecting rod 6 described above is disposed so as to extend straight in the seat width direction in the region between the reclining devices 5 and 5 in the seat back 2. In the region between the left and right side frames 2F1 and 2F1 of the seat back frame 2F where the connecting rod 6 is disposed, a steel pipe material having a C-shaped cross section that covers and protects the connecting rod 6 from the outer peripheral side. A long guide member 7 is constructed. The guide member 7 extends across the entire region in the seat width direction between the left and right side frames 2F1 and 2F1 of the seat back frame 2F, and each end portion is inside the side frames 2F1 and 2F1. And are firmly joined together by welding. By providing this guide member 7, the connecting rod 6 is covered from the outer peripheral side, and is protected so as not to interfere with the cushion pad 2P (see FIG. 3) disposed on the front side.

  Here, the basic structure of the seat back 2 will be described in detail. The seat back 2 has side frames 2F1 and 2F1 made of vertically long steel plate members that form the skeletons of the left and right side portions of the seat back 2, and the upper ends of the side frames 2F1 and 2F1. The upper frame 2F2 made of a hollow bending pipe (steel pipe) that is provided so as to connect the left and right sides of the seat back 2 and forms the upper skeleton of the central portion is firmly and integrally joined to each other by welding. It is structured. The seat back frame 2F is closed as a whole because the above-described guide member 7 is installed between the lower portions of the side frames 2F1 and 2F1 and integrally welded. It is assembled in a frame shape and has a structure with high bending strength and high torsional strength.

  A wire member 2F3 for supporting a cushion pad 2P (see FIG. 3) disposed on the front surface portion of the seat back frame 2F from the rear side of the seat is installed inside the frame. The wire member 2F3 is formed by bending a single linear steel material into a V shape, and both ends thereof are respectively applied to the front surface portions of both shoulder openings of the upper frame 2F2 of the seat back frame 2F. The bent-back portion of the V shape is applied to the front portion of the central portion of the guide member 7 in the sheet width direction and is welded. As a result, the wire member 2F3 is assembled to the seat back frame 2F so that each end is applied from the rear side of the seat and is supported, and the seat is received via the cushion pad 2P (see FIG. 3). The backrest load of the occupant can be received with a stable and strong force by the support from the rear side of the shoulder portions of the upper frame 2F2 and the central portion of the guide member 7.

  Next, the basic structure of each reclining device 5, 5 will be described with reference to FIG. The reclining devices 5 and 5 are arranged in symmetrical directions with each other, but the basic configuration of both is the same. Therefore, in the following, only the configuration of the reclining device 5 on one side will be described on behalf of these. The reclining device 5 has a disk-shaped ratchet 5A that is brought into surface contact with and integrally welded to the outer surface portion of the side frame 2F1 of the seat back frame 2F, and the inner surface portion of the side frame 3F1 of the seat cushion frame 3F. The ratchet 5A and the guide 5B are fitted together in the axial direction so that they can rotate relative to each other around the same axis. The outer ring 5C is configured to be prevented from coming off in the axial direction. The ratchet 5A and the guide 5B have two poles 5D and 5D each having an external tooth incorporated between them, and the hinge cam 5F according to the axial rotation of the hinge cam 5F supported at the center of the guide 5B. The relative rotation of each other is locked or released by being pressed to engage with the ratchet 5A via the slide cam 5E that is slid by the above or by being released from the engagement state with the ratchet 5A. ing.

  The hinge cam 5F is normally rotationally urged by the urging force of a spring 5G (torsion spring) hooked between the hinge 5G and the guide 5B to hold the poles 5D and 5D in mesh with the ratchet 5A. It is in a state. Accordingly, the reclining device 5 is normally in a state in which the backrest angle of the seat back 2 is fixed in a state where the relative rotation between the ratchet 5A and the guide 5B is locked (rotation stopped state). However, the hinge cam 5F is rotated by an operation shaft 5H, which is inserted through the center of the hinge cam 5F and integrated in the rotation direction, by the operation of the release lever 4 (see FIG. 1) described above, thereby the spring 5G. The pawls 5D and 5D are pulled back so as to be disengaged from the meshed state with the ratchet 5A. Thereby, the state (locked state) in which the ratchet 5A and the guide 5B are prevented from rotating is released, and the fixed state of the backrest angle of the seat back 2 is released. Further, when the lifting operation of the release lever 4 is released, the hinge cam 5F returns and holds the poles 5D and 5D in the state of being engaged again with the ratchet 5A by the biasing force of the spring 5G. ing. The above is the basic structure of each reclining device 5, 5.

  By the way, the above-described guide member 7 is disposed between the side frames 2F1 and 2F1 of the seat back frame 2F so that the opening 7A having a C-shaped cross section is directed to the rear side of the seat. (See FIG. 3). Thereby, the guide member 7 is disposed in a state of covering the connecting rod 6 from the upper side of the seat, the front side of the seat, and the lower side of the seat by the cross-sectional shape of the C-shaped cross section. Thereby, the guide member 7 is set as the structure which can exhibit strong support strength with respect to the load which each receives from a sheet | seat upper direction, a sheet | seat front, and a sheet | seat lower side. Therefore, the backrest load of the seated occupant on the seat back 2 and the pressing loads from the front side and the lower side of the cushion pad 2P accompanying the tension of the skin material 2C (see FIG. 3) are strong by the guide member 7. Since it is supported by the supporting force, the connecting rod 6 is appropriately protected.

  Here, the cushion pad 2P is provided so as to be covered with the front surface of the seat back frame 2F, and its upper, lower, left, and right edges cover the respective frame portions of the seat back frame 2F from the outer peripheral side. Is provided in a state of being bent back to the rear side of the seat. Further, the skin material 2C is placed so as to cover the entire surface of the cushion pad 2P, and the upper, lower, left and right edges thereof are fastened to the seat back frame 2F in a state of being pulled to the rear side of the seat. It is in a state of being stretched. Thus, the tension force of the skin material 2C stretched on the surface side of the guide member 7 described above from the front side to the seat rear side through the lower side is provided on the front side. It can be applied as a pressing load from the lower side.

  In detail, both end portions of the guide member 7 described above are in surface contact with the disc-shaped ratchets 5A and 5A constituting the reclining devices 5 and 5 in the side frames 2F1 and 2F1 of the seat back frame 2F. It is abutted against and welded to the inner surface portion of the region portion with high structural strength welded in the state. As a result, the guide member 7 is firmly connected to the side frames 2F1 and 2F1 with high welding strength, and the guide member 7 is rigidly joined between the portions having such high structural strength. Thus, the structural strength against bending and twisting of the entire seat back frame 2F is increased.

  Thus, the guide member 7 is disposed so as to exhibit a high structural strength against various loads received under the usage environment of the seat back 2. Specifically, as shown in FIG. 3, the guide member 7 is formed to have a round C-shaped cross section as a whole, so that an edge does not appear in a portion other than the opening 7 </ b> A described above. The cushion pad 2P is not easily caught by the guide member 7. In addition, since the contact between the back of the seated occupant leaning on the seat back 2 and the guide member 7 is softened, it is difficult to feel a foreign object, and the connecting rod 6 can be protected without impeding the seating feeling. Yes.

  By the way, the opening 7A of the guide member 7 is formed so as to open wider than the diameter of the connecting rod 6 so that the connecting rod 6 can be inserted into the guide member 7 from the rear side of the seat. The opening 7A is formed to have the same opening width (height) over the entire region in the sheet width direction, which is the longitudinal direction of the guide member 7, and as shown in FIG. The connecting rod 6 having a slightly short length can be inserted into the guide member 7 in a straight and parallel state from the opening 7A. And since the said opening part 7A has the opening width (height) opened wider than the diameter of the connecting rod 6, the connecting rod 6 inserted in the inside of the guide member 7 is further provided at both ends thereof. Work to weld integrally with the operation shafts 5H and 5H inserted in the axial direction from both outer sides of the reclining devices 5 and 5 described above (work to insert and weld arc welding rods or the like into the opening 7A) ) Can be performed from the outside on the rear side of the seat through the opening 7A. Therefore, the connecting rod 6 may be configured to be assembled before or after the guide member 7.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, as shown in FIG. 5, the cross-sectional shape of the guide member may be formed in a square shape in a “U” cross section. The opening formed in the guide member may be narrower than the diameter of the connecting rod. It is sufficient that the opening is open to such an extent that at least a work space for enabling connection work such as welding for connecting the end of the connecting rod to the operation shaft of the reclining device can be performed from the outside. Therefore, it does not necessarily have to be opened over the entire length, and it is only necessary to be formed to be partially opened only at the place where the above operation is performed. The connecting structure of the connecting rod and each operating shaft is a fitting shape in which each operating shaft is simply inserted into the end of the connecting rod and connected together in the rotational direction. It may be connected integrally by a separate joining means such as welding shown in the above embodiment.

  The configuration of the present invention can also be applied to a type in which the operating shaft of at least one reclining device is inserted in the axial direction from the inside to the outside of the side frame of the seat back frame and attached to the reclining device. it can. For example, before the step of assembling both the side frames and the upper frame of the seat back frame, an operation shaft is inserted into and connected to at least one end of the connecting rod, and the connected operation shaft is connected to one side of the seat back frame. After being inserted into the frame from the inside (when the operating shaft is connected to both ends of the connecting rod, the operating shafts on both sides are inserted into the side frames before assembly of the seat back frame from the inside respectively. In this state, the side frames and the upper frame of the seat back frame may be assembled together.

  In this case, if the opening formed in the guide member is narrower than the diameter of the connecting rod, the guide frame is assembled at the stage of integrally assembling the side frames and the upper frame of the seat back frame. It is necessary to weld and assemble the members together on each side frame. In that case, the opening formed in the guide member inserts the operation shaft connected to the end of the connecting rod into the side frame of the seat back frame from the inside to the outside and passes through the shaft center of each reclining device. It functions as a work space for enabling a work to be performed by inserting a jig or the like from the outside. In this case, the operation shaft connected in advance to the end of the connecting rod is considered to form an integral structure with the connecting rod, and the “external for connecting the connecting rod to the operation shaft of each reclining device” The configuration corresponding to the “operation shaft” of “work space from” is replaced with “hinge cam 5F” (see FIG. 4) that is mounted by receiving the insertion of the operation shaft 5H in the reclining device 5 shown in the first embodiment. It will be.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2F Seat back frame 2F1 Side frame 2F2 Upper frame 2F3 Wire member 2P Cushion pad 2C Skin material 3 Seat cushion 3F Seat cushion frame 3F1 Side frame 4 Release lever 5 Reclining device 5A Ratchet 5B Guide 5C Outer ring 5D Pole 5E Slide cam 5F Hinge cam 5G Spring 5H Operation shaft 6 Connecting rod 7 Guide member 7A Opening

Claims (3)

A vehicle seat provided with a connecting rod that connects operation shafts for performing unlocking operation of each reclining device provided on the left and right side portions of the seat back,
A long guide member is provided between the left and right side frames of the seat back and covers and protects the connecting rod from the outer peripheral side,
The guide member covers the connecting rod from the upper side of the seat, the front side of the seat, and the lower side of the seat, and forms a working space from the outside for connecting the connecting rod to the operation shaft of each reclining device on the rear side of the seat. A vehicle seat characterized in that the vehicle seat is formed in an open cross-sectional shape having an opening. The vehicle seat according to claim 1,
The vehicle seat characterized in that the opening is formed so as to be wider than the diameter of the connecting rod so that the connecting rod can be inserted from the outside. The vehicle seat according to claim 1 or 2,
A vehicle seat characterized in that the guide member is formed in a C-shaped cross section and a round cross-sectional shape as a whole.

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