Abstract: A weight adjustment support device for a vehicle seat such as an automotive seat is disclosed which is capable of adjusting the cushioning property of the seat according to weights or taste of an occupant. The device includes a mounting frame and a seat supporting frame on which the seat is placed. A pair of X-shaped expansion legs are provided between the two frames to be able to raise or fall the seat supporting frame vertically. A pair of wedge members are provided to secure one end of the expansion leg via elastic means. The two wedge members are combined such that the slanting surface of one wedge member having a grade is applied against the slanting surface of the other wedge member having the same but oppositely directed grade. The one wedge member is then moved by means of a feed mechanism to vary the distance between the respective bottom surfaces of the two wedge members so as to be able to adjust the energizing forces of the elastic means.

Abstract: An apparatus for automatically mounting tension springs (tension coil springs) to suspend a seat frame and a pad receiving member forming an automotive seat is disclosed which comprises a supply hopper, a transfer mechanism, a guide member, a setting device and a direction restricting member. In the apparatus, when loaded into the supply hopper, the tension springs are separated from one another and then discharged one by one therefrom to the transfer mechanism, where they are rectified in the right and left deviations thereof by the guide member before they are delivered to the setting device. Then, the tension springs are caught and lifted up by the setting device and, during this lifting operation, they are rectified in the direction thereof by the direction restricting member, so that they can be automatically mounted to the seat frame as well as to the pad receiving member.

Abstract: A locking device for a seat suspension provided in a seat for use in a vehicle such as an automobile is disclosed in which an upper frame attached to the seat proper side is supported via front and rear links to a lower frame fixed to the vehicle floor side in such a manner that it can be oscillated in a vertical direction relative to the lower frame, the upper frame is provided with engagement pins, and the lower frame is provided with lock plates engageable with the engagement pins. The lock plates are connected through link piece means with a shaft slidable longitudinally by an operation lever and also can be engaged with or disengaged from the engagement pins by the longitudinal sliding movements of the shaft. When the lock plates are engaged with the engagement pins, the link-piece means is connected with the shaft in a direction perpendicular thereto.

Abstract: A seat for use in an automobile, airplane and house is disclosed and includes a top cover member having a decorative welt therein that is formed in a portion of the top cover member. The top cover member is fixed to the surface of a cushion member formed of foam material. The welt is formed by enveloping the external periphery of a string-shaped welt core member with the top cover member in a .OMEGA.-shaped manner using a groove which is formed by mating two molding pieces. Accordingly, the seat according to the invention can be manufactured at lower costs.

Abstract: A weight adjustment device for a seat suspension to be provided in a seat for a vehicle such as an automobile is disclosed in which an upper frame and a lower frame are connected to each other by means of links, a rotary shaft is journalled between the two side portions of the lower frame and is provided at the two ends thereof with pinion gears integrally therewith, the pinion gears are intermeshed with sector gears freely rotatable in a vertical direction, and there are tension springs respectively extending between the respective first ends of the pinions gears and arms rotatable integrally with the links, whereby the sector gears are rotated by means of operation of an operation lever fixed to the rotary shaft to change the tensile forces of the tension springs so as to be able to adjust the height of the upper frame relative to the lower frame.

Abstract: A structure for securing the trim cover assembly of a seat back in an automotive seat is disclosed in which the seat back is formed in the back thereof with a slit extending along the internal periphery of the seat back. The end portions of a front-side trim cover assembly for covering the front side of the seat back are inserted through the slit and are fixed to the interior of the seat back. The securing portions of hard material disposed in the peripheral end portions of a back-side trim cover assembly for covering the back side of the seat back are inserted through the slit and thereafter, due to the tension of the back-side trim cover assembly, are engaged with the inner side of the slit.

Abstract: A seat for a vehicle in which a seat back is separated into a plurality of portions in the vertical direction and a reclinable angle of each of the plurality of separated portions can be varied is disclosed, which includes a reclining device provided in connection with the lowest portion of the separated portions and a cushion of the seat for adjusting a reclinable angle of the lowest portion relative to the cushion of the seat, a plurality of angle adjusting devices each provided in connection with adjacent ones of the separated portions for adjusting an angle of an upper portion of the adjacent ones relative to a lower portion thereof, a fine adjusting member provided in connection with each of the plurality of angle adjusting devices for finely adjusting the angle of the upper portion, a member for coupling each of the plurality of angle adjusting devices to the reclining device to thereby operate the plurality of angle adjusting devices in response to each operation of the reclining device, whereby the se

Abstract: A seat suspension featuring a weight-responsive, height-adjusting mechanism which is advantageously employed in a seat intended to be installed in a smaller sized vehicle is disclosed. The seat suspension includes a pair of shock absorbers arranged at the lower portion of X-shaped links with its height being substantially the same as that of the lower portion of said links.

Abstract: A headrest for seats for use in vehicles has a fixed frame fixedly secured to the upper ends of stays supported on a seat back, two right and left movable frames secured to a panel of the headrest, and two pairs of parallel links connecting the fixed and movable frames; a first pair connecting the right movable frame to the right end portion of the fixed frame, and a second pair connecting the left movable frame to the left end portion of the fixed frame. One of the first pair of links is connected with one of the second pair via a connecting portion. With such structure, the headrest can be moved back and forth with little change in height, and, since there are no moving parts present in all portions of the headrest except in the two end portions of the fixed frame, a throughbore can be provided in the central portion of the headrest.

Abstract: A headrest mounting structure to be provided in seats for vehicles such as automobiles is disclosed in which two spaced stays for supporting a headrest onto a seat back are respectively inserted into two support tubes provided in the seat back and the two support tubes are respectively inserted through a pair of brackets fixed to the seat back. Each of insertion bores formed in the brackets for insertion of the support tubes and insertion bores formed in the support tubes for insertion of the stays is formed as an elongated bore having a straight portion extending transversely of the seat back. Such elongated insertion bores permit compensation of errors in the distances between the stays as well as between the support tubes.

Abstract: A fixing device for a vehicle seat back comprises a support element mounted on the vehicle side wall, and a pivotal hook element engageable with the support element. A set part of the support element includes a hook-preventing upward extension for preventing the hook element from slipping off the set part. A bracket is mounted on the seat back together with the hook element, the bracket having a leg supporting a cushion which engages the set part in an upright and a locked position of the seat back. The bracket leg has an edge confronting the extension and engages therewith upon application of external forward and rearward loads on the seat back.

Abstract: The present invention relates to a fixed structure of the cut edges of a top layer member of a seat for vehicles. At the edges therefrom a band piece with a latching portion is secured to the front end thereof and said band piece mounted on the top layer member is arranged not to come off by holding same between a flame member within a seat and a holding member.

Abstract: A vehicle seat such as an automotive seat is disclosed in which the rearward portion of a cushion frame is attached to a vehicle floor by shaft pins so that the forward portion of the cushion frame can be raised up and lowered down by link members. These link members are attached to a connecting bar for connecting these link members with a back frame. In this vehicle seat, when the back frame is reclined relative to the cushion frame, then the link members are rotated forwardly by the connecting bar so that the forward portion of the cushion frame in engagement with the respective central portions of the link members can be raised up about its pivotally mounted portion in the rearward portion thereof, that is, about the shaft pins.

Abstract: A side support device for use in a seat back or a seat cushion of an automotive seat is disclosed. In the side support device, two sub-panels or support panels are provided respectively in the insides of the two side portions of a seat frame, the respective inner ends of the sub-panels or support panels are engaged with the associated portions of a pad receiving member extended between the two sides of the seat frame, and the respective outer ends thereof are connected via connecting links to an operation member, whereby by means of operation of the operation lever the side support device can be adjusted so as to support an occupant uniformly from his or her side portions through his or her central or back portions.

Abstract: A device for delivering spring clamps is disclosed, which spring clamps are welded to a pipe frame for a vehicle seat so as to extend spring members across such pipe frame. In this spring clamp delivery device, a movable delivery mechanism is operated to charge the spring clamps that are discharged via a transfer rail from a supply hopper individually into a plurality of chutes which are provided in the movable delivery mechanism substantially at the same intervals as those of the spring clamps relative to the pipe material, and then to deliver such spring clamps to the pipe material that has been set in a welding machine. Thus, even if varied in size, the spring clamps can be delivered to the pipe material in such a positive manner that they can be positioned to correspond to the predetermined positions of the pipe material.

Abstract: The present invention relates to a seat lifter employed for a vehicle seat comprising a rotary fulcrum being mounted at the front portion of a seat cushion of the seat, a link mechanism for rotating the seat centering around the rotary fulcrum being mounted at the back portion thereof, a link mechanism for supporting and adjusting the link of said link mechanism by means of an offset pin formed projectly on a disc with a tooth groove being provided, thereby adjusting a seat angle and elevating the movement of the seat by rotary adjustment of the seat centering around the rotary fulcrum.

Abstract: A jig for automatically welding pipe frames used to form vehicle seats is disclosed. In this jig, there is provided on a frame carrying plate a guide element having the reference plane of one of two side portions of a frame, so that the one side portion of the frame can be welded while it is in abutment with the guide element. To weld the other side portion of the frame, the frame carrying plate is moved and two adjusters provided in a bed plate are used for the reference. With such structure, while a welding machine remains fixed, by changing the references according to the portions to be welded in the width direction of the pipe frame, it is possible to weld the two side portions of the frame accurately.

Abstract: A decorative button for use in the surface of an automotive seat and method for making same are disclosed. In the method, a button core member is set on the back side of a trim cover assembly comprising a top cover member, a wadding and a wadding cover, and the button core member is covered by a reinforcing member. The peripheries of the button core member are then pressed and heated to weld the top cover member, wadding, wadding cover and reinforcing member around the button core member to one another into an integral body and, at the same time, to form a deep-valley-shaped recessed portion in the surface of the top cover member around the button core member.

Abstract: A decorative member such as a welt or a button attached to a surface layer of a seat cushion, and a method and apparatus for forming such a decorative member are disclosed. In the method and apparatus, an upper plate is disposed for vertical movement relative to a lower plate, and a pair of holding members defining an insertion space between their upper end portions are vertically or horizontally movably mounted on the lower plate. A covering and a core providing the decorative member are inserted in the insertion space, and a seat cushion is placed between the upper and lower plates with its surface layer facing the holding members. The upper plate is urged downward toward the lower plate to compress the seat cushion onto the holding members while, at the same time, enclosing the core in the covering in the cooperation with the holding members. High frequency current is supplied to complete the decorative member and to weld it to the surface layer of the seat cushion.

Abstract: A seat for vehicles such as automobiles etc., wherein a seatback is splitted into an upper part and a lower part and each of these splitted upper and lower parts is equipped with a respective reclining device. An intermediate releasing device which reclines the upper part is mounted on the opposite side in relation to the reclining device of the lower part and a lock release lever of the intermediate reclining device is also mounted on the opposite side in relation to the reclining device of the lower part.