JP2013035335A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To join a shorter hook wire that engages with a lock mechanism to a cushion pad, while preventing coming-off.SOLUTION: The hook wire 10 includes: an engaging part 11 which is exposed to the outside of a cushion pad 3A and engages with a lock mechanism; and an embedded part 12 inserted and integrally embedded into the cushion pad 3A during foam molding. The embedded part 12 has a straight portion 12A extending in the direction of inserting the engaging part 11 into the cushion pad 3A, and a bent portion 12B bent and extending from the distal end of the straight portion 12A in the perpendicular direction. On the bent portion 12B, a coming-off preventing structure (a crushed plate portion 12B1) is provided for enhancing joint force on the cushion pad 3A in the coming-off direction.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat in which a hook wire that engages with a lock mechanism provided outside the cushion pad is integrally provided on the cushion pad.

  Conventionally, there is a vehicle seat in which a seat cushion is locked and fixed to a lock mechanism provided on a floor (Patent Document 1). Specifically, a frame-like hanging wire is integrally coupled to the seat cushion, and the seat cushion is fixed on the floor by locking the hanging wire by a locking mechanism. The hook wire is provided in a state in which it is prevented from coming off from the seat cushion by being hooked on a shaping holding wire embedded in a cushion pad of the seat cushion.

JP-A-8-214986

  However, in the prior art described in the above-mentioned Patent Document 1, the length of the hanging wire must be long enough to be hooked on the holding wire. The present invention was devised as a solution to the above problem, and the problem to be solved by the present invention is to enable the hanging wire to be coupled to the cushion pad in a shorter length to prevent it from coming off. 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 the vehicle seat by which the hook wire which engages with the lock mechanism provided in the exterior of the cushion pad was integrally provided in the cushion pad. The hanging wire has an engaging portion that is exposed to the outside of the cushion pad and engaged with the lock mechanism, and an embedded portion that is inserted into the cushion pad at the time of foam molding and integrally formed. The shape is made. The embedded portion includes a straight portion that extends in a direction in which the engaging portion is inserted into the cushion pad, and a bent portion that is bent and extends in a direction perpendicular to the end portion where the straight portion extends. The bent portion is provided with a slip prevention structure that enhances the coupling force in the pulling direction with respect to the cushion pad.

  According to the first aspect of the present invention, by providing the pull-out preventing structure at the bent portion of the hanging wire, it is possible to effectively obtain the retaining force against the cushion pad without taking a long straight portion. . Therefore, the hanging wire can be coupled to the cushion pad in a shorter length and prevented from coming off.

  According to a second invention, in the first invention described above, the hanging wire is formed of a pipe material having a hollow cross section, and the cross section of the bent portion is crushed into a plate shape so that the surface is directed in the drawing direction, thereby constituting a structure for preventing slippage. Is.

  According to the second aspect of the present invention, the structure capable of exerting a strong retaining force can be easily formed by crushing the cross section of the bent portion into a plate shape to form the retaining structure.

  According to a third invention, in the first invention described above, the hook wire is formed of a pipe material having a hollow cross section, a through hole is provided in the peripheral wall portion of the bent portion, and the foaming material of the bent portion is formed during foam molding of the cushion pad It is made to flow into the hollow interior and is integrally cured to constitute a drop prevention structure.

  According to the third aspect of the present invention, the through hole is formed in the peripheral wall portion of the bent portion, and the foaming raw material is allowed to flow into the hollow interior of the cushion pad during foam molding so as to integrally cure, thereby forming a drop prevention structure. Thus, it is possible to easily form a configuration capable of exhibiting a strong retaining force. Specifically, the foam pad raw material is filled into the inside of the bent portion to increase the structural strength of the bent portion, so that a structure with high structural strength that can effectively exert the retaining force can be obtained. it can.

1 is a perspective view illustrating an outline of a vehicle seat according to Embodiment 1. FIG. It is the perspective view which looked at the cushion pad from the back side. It is the perspective view which showed the engagement structure of a hook wire and a lock mechanism. It is an internal sectional view showing the state before the hanging wire is locked to the locking mechanism. It is internal sectional drawing which showed the state which the hook wire locked to the lock mechanism. FIG. 6 is a perspective view illustrating a configuration of a vehicle seat according to a second embodiment. It is sectional drawing which showed the state which urethane resin flowed in the hanging wire and was hardened. FIG. 6 is a perspective view illustrating a configuration of a vehicle seat according to a third embodiment. It is sectional drawing which showed the state which urethane resin flowed in the hanging wire and was hardened. FIG. 6 is a perspective view illustrating a configuration of a vehicle seat according to a fourth embodiment. It is sectional drawing which showed the state which urethane resin flowed in the hanging wire and was hardened.

  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 is configured as a seat for a three-seater seat arranged in the last row of the vehicle. The vehicle seat 1 includes a seat back 2 that serves as a backrest for a seated occupant, a seat cushion 3 that serves as a seating portion, and headrests 4 and 4 that support a head.

  The seat cushion 3 is assembled by attaching a cushion pad 3A formed by foaming urethane resin from the upper surface side to an internal frame structure (not shown), and further on the surface portion of the seat cushion 3. A cloth-made skin material 3 </ b> B is attached and assembled from the upper surface side so as to cover the entire outer surface. Further, as shown in FIG. 2, a U-shaped portion that is engaged with and locked by a locking mechanism 20 (see FIG. 1) provided on the floor is formed on the center portion in the width direction on the rear side of the seat cushion 3. The hanging wire 10 is integrally provided. The hook wire 10 is formed by bending a single steel rod (pipe material) having a hollow cross section into a U shape and is exposed from the cushion pad 3A to the rear side of the seat. 11 and an embedded portion 12 that extends from both U-shaped leg portions and is embedded in the cushion pad 3A and integrally joined thereto.

  Specifically, the hook wire 10 is set (inserted) in a molding die when the cushion pad 3A is foam-molded, and the embedded portion 12 is embedded in a state of being integrally coupled in the cushion pad 3A. ing. Here, the embedded portion 12 of the hook wire 10 is inward from the straight portion 12A extending straight from both the leg portions of the engaging portion 11 into the cushion pad 3A, and from the front end portion of each straight portion 12A. And a bent portion 12B extending vertically bent toward the side to be formed. Further, a crushed plate portion 12B1 serving as a disconnection preventing structure for making it difficult for the hooking wire 10 to be detached from the cushion pad 3A is formed at the bent end portion of each bent portion 12B.

  Each of the crushing plate portions 12B1 is formed by crushing the annular hollow cross section of each bent portion 12B into a plate shape so that the surface faces in the pulling direction (the direction facing the engaging portion 11) with respect to the cushion pad 3A. Yes. By this crushed plate portion 12B1, a surface portion is formed in the cushion pad 3A so that the surface is directed straight in the pulling direction, and a strong retaining force is exhibited. Thus, the simple structure in which a part of the bent portion 12B is crushed to form the crushed plate portion 12B1 effectively obtains a retaining force for the cushion pad 3A without taking the length of the straight portion 12A to be long. be able to. Therefore, the hanging wire 10 can be coupled to the seat cushion 3 in a shorter length and prevented from coming off.

  Next, the configuration of the lock mechanism 20 will be described. As shown in FIGS. 3 to 5, the lock mechanism 20 includes a base plate 21, a hook 22, a pole 23, a tension spring 24, and an operation arm 25. The base plate 21 is integrally fixed to the floor and has a recess 21A that can receive the hanging wire 10 from above. The hook 22 is rotatably supported on the base plate 21 by the first connecting shaft 22A, and the pole 23 is integrated with the operation arm 25 by the second connecting shaft 23A with respect to the base plate 21. And is pivotally supported. The tension spring 24 is hooked between the hook 22 and the pole 23, and is configured to apply an urging force in a direction in which the hooking portion of the hook 22 and the hooking portion of the pole 23 are attracted to each other.

  As shown in FIG. 4, the hook 22 is normally in a state in which it is urged to rotate clockwise by the tension spring 24 in the illustrated clockwise direction, and is engaged with the locking plate portion 21 </ b> B of the base plate 21 (initial stage). Position). In this initial state, the hook 22 is in a state where an upper arm portion 22 </ b> B that extends in the shape of an arm projects into the recess 21 </ b> A of the base plate 21. At this time, the pole 23 is held in a state in which the pole 23 is pressed against the upper arm portion 22B of the hook 22 and locked in the counterclockwise direction shown in the figure by the biasing force of the tension spring 24. Yes.

  The hook 22 rotates in such a manner that the upper arm portion 22B is pushed downward by the hanging wire 10 due to the movement of the hanging wire 10 being pushed into the recess 21A of the base plate 21, and another arm is formed on the outer peripheral portion thereof. The lower arm portion 22C formed in a shape extending in a shape is turned to the back side (the upper side in the drawing) of the hanging wire 10 to close the concave portion 21A (see FIG. 5). When the lower arm portion 22 </ b> C is in a rotational position in which the recess 21 </ b> A is closed, the corner 23 </ b> B of the pole 23 is formed by protruding the hook 22 with the biasing force of the tension spring 24. The upper arm 22B rotates in a state of being submerged under the step, and the hook 22 is prevented from returning in the clockwise direction (locked state). Thereby, the hanging wire 10 is held in a state (locked state) restrained in the space of the recess 21 </ b> A closed by the lower arm portion 22 </ b> C of the hook 22.

  When the hook 22 is locked, the operation arm 25 integrated with the pole 23 is pushed to the left side in the drawing via the wire 25A by the operation of an operation member (not shown) installed on the vehicle body wall. It is canceled by doing. Specifically, when the operation arm 25 is pushed leftward and rotated clockwise in the figure, the corner 23B of the pole 23 is engaged with the upper arm 22B of the hook 22 (under the step). The restriction state of the return rotation of the hook 22 is released. As a result, as shown in FIG. 4, the hook 22 is rotated in the clockwise direction as shown in the drawing so as to push the hanging wire 10 to the outside of the recess 21 </ b> A by the urging force of the tension spring 24, thereby locking the hanging wire 10. Release the state. The above is the configuration of the lock mechanism 20.

  Thus, according to the configuration of the vehicle seat 1 of the present embodiment, the straight portion 12A is made longer by providing the bent portion 12B of the hanging wire 10 with the prevention structure (collapse plate portion 12B1). Even without this, it is possible to effectively and simply obtain a configuration capable of exerting a strong retaining force against the cushion pad 3A.

  Then, the structure of the vehicle seat 1 of Example 2 is demonstrated using FIGS. In the present embodiment, portions that are substantially the same as the respective configurations shown in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different portions are denoted by different reference numerals. This will be explained in detail. The hanging wire 10 of the present embodiment has the same annular hollow cross-sectional configuration as the configuration shown in the first embodiment, but the bent end of each bent portion 12B is externally provided as an opening 12B2. The shape is open. As a result, the hanging wire 10 causes the foamed raw material to flow into the hollow interior of each bent portion 12B from each opening 12B2 during foam molding of the cushion pad 3A, so that the foamed raw material is also integrated into each bent portion 12B. It can be bonded to the cured state. As a result of this connection, each bent portion 12B is connected to the cushion pad 3A in a state of being firmly removed, and a disconnection prevention structure that can hold the hook wire 10 firmly so as not to be detached from the cushion pad 3A is configured. Has been.

  In this way, the hanging wire 10 is formed of a pipe member having a hollow cross section, and the bent end portion of the bent portion 12B is used as an open end (opening portion 12B2), and foamed into the hollow interior during foam molding of the cushion pad 3A. By forming the prevention structure by allowing the raw materials to flow in and integrally curing, it is possible to easily form a configuration capable of exerting a strong retaining force. Moreover, since the foaming raw material of the cushion pad 3A is filled in the hollow inside of the bent portion 12B, the structural strength of the bent portion 12B is increased, so that a structure with high structural strength that can effectively exert the retaining force is obtained. be able to.

  Then, the structure of the vehicle seat 1 of Example 3 is demonstrated using FIGS. 8-9. In the present embodiment, portions that are substantially the same as the respective configurations shown in the first and second embodiments are denoted by the same reference numerals, description thereof is omitted, and different portions are denoted by different reference numerals. Will be described in detail. The hanging wire 10 of the present embodiment has an annular hollow cross-sectional configuration similar to that shown in the second embodiment, and the bent end portion of each bent portion 12B is opened to the outside as an opening portion 12B2. It has an open shape. Furthermore, the hanging wire 10 of this embodiment is provided with two through holes 12B3 in the peripheral wall portion of each bent portion 12B, and the foaming raw material is used for each bent portion 12B when foaming the cushion pad 3A. From the opening end (opening portion 12B2) and the through holes 12B3, it is allowed to flow into the hollow interior so that the foaming raw material is integrally cured in each bent portion 12B. Yes. Specifically, each through-hole 12B3 penetrates the outer peripheral portion of each bent portion 12B from the peripheral wall surface on one side to the peripheral wall surface on the other side, and the through-holes 12B3 face each other in a straight line. Has been.

  Thus, the hook wire 10 is formed of a pipe member having a hollow cross section, and in addition to the bent ends of the bent portions 12B being the open ends (opening portions 12B2), the outer periphery of each bent portion 12B. Two through-holes 12B3 are formed in the portion so that when the cushion pad 3A is foamed, the foaming material can easily flow into the hollow interior of each bent portion 12B. It can be combined into a state in which it is more appropriately filled and integrally cured. Therefore, a strong drop prevention structure can be obtained satisfactorily.

  Then, the structure of the vehicle seat 1 of Example 4 is demonstrated using FIGS. In the present embodiment, portions that are substantially the same as the respective configurations shown in the first to third embodiments are denoted by the same reference numerals, description thereof is omitted, and different portions are denoted by different reference numerals. Will be described in detail. The hanging wire 10 of the present embodiment has the same annular hollow cross-sectional configuration as the configuration shown in the third embodiment, and the bent end portion of each bent portion 12B opens to the outside as an opening portion 12B2. And has two through holes 12B4 formed on the outer periphery of each bent portion 12B. Specifically, each of the two through-holes 12B4 is arranged such that the formation positions on the outer peripheral portion of each bent portion 12B are shifted from each other in the direction in which the bent portion 12B extends, and the circumferential direction of each bent portion 12B Are arranged in a relationship that does not line up side by side. Thereby, at the time of foam molding of the cushion pad 3A, the flow of the foam raw material flowing from each through-hole 12B4 does not interfere with each other, and the foam raw material flows smoothly into the hollow inside of each bent portion 12B. ing.

  As described above, the hook wire 10 is formed of a pipe material having a hollow cross section, and in addition to the bent ends of the bent portion 12B being the open ends (opening portions 12B2), it penetrates the outer peripheral portion of the bent portion 12B. Two holes 12B4 are formed so as to be displaced from each other, and the foaming raw material can be easily flown into the hollow interior of each bent portion 12B when foaming the cushion pad 3A. The foaming raw material can be more appropriately filled into the interior and bonded together. Therefore, a strong drop prevention structure can be obtained satisfactorily.

  As mentioned above, although embodiment of this invention was described using the four Examples, this invention can be implemented with various forms other than the said Example. For example, in each of the above embodiments, the cushion pad 3A of the seat cushion 3 is illustrated as the cushion pad 3A on which the hanging wire 10 is provided, but may be applied to the cushion pad of the seat back. The “outside of the cushion pad” provided with the lock mechanism may be any structural member other than the floor, such as a vehicle body wall portion or other seat structure portion disposed adjacent to the cushion pad, and is particularly limited. Is not to be done. Further, as a structure for preventing the hook wire from coming off, a configuration in which the end portion of the bent portion 12B shown in the first embodiment is crushed to form a crushed plate portion 12B1, and the outer peripheral portion of the bent portion shown in the second and third embodiments is penetrated. A configuration combining the configuration for forming the holes 12B3 (12B4) may be used. In addition, the collapsible plate portion formed in the bent portion of the hanging wire is formed in the middle portion of the bent portion and the end portion is opened, thereby preventing the slipping plate portion and the opening portion from being combined. Can be obtained. In addition, the structure for preventing the hanging wire from coming off is such that the bent end of the bent portion is not opened, and a through hole is simply formed in the outer peripheral portion of the bent portion, and the foam pad raw material for the cushion pad is formed inside the hollow portion. The structure which made it easy to flow in may be sufficient.

  Moreover, the hook wire may be provided in a state in which the engaging portion is exposed from any part surface of the cushion pad. That is, the hanging wire is disposed so as to be exposed toward the place where the object to be locked with the cushion pad is disposed. Further, the shape of the engaging portion of the hook wire only needs to be appropriately formed in accordance with the configuration of the locking mechanism to be engaged, and is provided with an end shape or bent into a stepped shape and extends. Various forms such as those provided in this manner can be applied. In this case, the embedded portion may be configured to be embedded and coupled in the cushion pad in the form of one leg, instead of the two-legged form as shown in the above embodiments. However, the bond strength is weakened. Further, the bending direction of the bent portion may be any direction as long as it is perpendicular to the straight portion of the embedded portion, and the bending angle is an angle that does not reach the vertical angle, or You may be a thing of the form bent to the angle beyond a perpendicular angle.

  Moreover, in each said Example, although the direction where the bending part 12B of the hooking wire 10 bends was made into the mutually inward direction, even if it bend | folds in the mutually opposing outer direction and an up-down direction, I do not care. In addition, the bending direction of each bent portion may be bent in different directions. Thereby, even when there is an obstacle in the bending direction of the bent portion, the bent portion can be bent in a manner that does not interfere with the obstacle, and the structure for preventing the cushion pad from coming off can be appropriately set. Moreover, the hanging wire may be formed of a member having another hollow cross section such as a square pipe. Further, the structure for preventing the disconnection may have a configuration in which the bending portion is bent back into a wave shape or a spiral shape to enhance the coupling force in the pulling direction with respect to the cushion pad.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 3A Cushion pad 3B Skin material 4 Headrest 10 Hanging wire 11 Engagement part 12 Buried part 12A Straight part 12B Bending part 12B1 Collapse board part (detachment prevention structure)
12B2 opening (prevention structure)
12B3 Through hole (prevention structure)
12B4 Through hole (prevention structure)
20 Locking mechanism 21 Base plate 21A Recessed portion 21B Locking plate portion 22 Hook 22A First connecting shaft 22B Upper arm portion 22C Lower arm portion 23 Pole 23A Second connecting shaft 23B Corner portion 24 Tension spring 25 Operation arm 25A Wire

Claims (3)

A vehicle seat in which a hook wire that engages with a lock mechanism provided outside the cushion pad is integrally provided on the cushion pad,
The hook wire is exposed to the outside of the cushion pad and engaged with the lock mechanism, and an embedded portion formed by being integrally embedded in the cushion pad during foam molding. And a shape having
The embedded portion has a straight portion that extends in a direction in which the engaging portion is inserted into the cushion pad, and a bent portion that is bent and extends in a direction perpendicular to a front end portion of the straight portion, The vehicle seat according to claim 1, wherein the bent portion is provided with a slip-off preventing structure that increases a coupling force in the pulling direction with respect to the cushion pad. The vehicle seat according to claim 1,
The vehicle seat, wherein the hook wire is formed of a pipe member having a hollow cross section, and the cross section of the bent portion is crushed into a plate shape so that the surface is directed in the drawing direction. The vehicle seat according to claim 1,
The hook wire is formed of a pipe material having a hollow cross section, and a through hole is provided in the peripheral wall portion of the bent portion, and when the cushion pad is foam-molded, the foam raw material is allowed to flow into the hollow portion of the bent portion to be integrally cured. A vehicle seat characterized in that the structure for preventing slipping out is configured.

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