JP2019189155A - Seat rail device and method for manufacture thereof - Google Patents

Abstract

To provide a configuration which can improve rigidity without deterioration of quality even if a reinforcement bracket is welded and fixed to an upper rail.SOLUTION: An upper rail 30 comprises a pair of first upper rail 31 and second upper rail 32 which are so located as to face other. The first upper rail 31, to which a front side bracket 40a and a rear side bracket 50a are welded and fixed, and the second upper rail 32, to which a front side bracket 40b and a rear side bracket 50b are welded and fixed, are connected to each other by connection parts 33, 34.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a seat rail device for sliding a vehicle seat back and forth and a method of manufacturing the same.

  Conventionally, as a seat rail device for sliding a vehicle seat back and forth, for example, a seat rail device disclosed in Patent Document 1 below is known. In the seat rail device, the upper rail slides with respect to the lower rail such that the rollers provided on each of the first upper rail and the second upper rail constituting the upper rail are guided by the guide portion of the lower rail. Thus, the vehicle seat to which the upper rail is fixed is supported so as to be slidable in the front-rear direction with respect to the vehicle floor to which the lower rail is fixed.

Japanese Patent Laying-Open No. 2015-186984

  By the way, in the above-described seat rail device, in order to prevent the upper rail from being separated (peeled) from the lower rail even when an external force is applied during a collision or the like, the upper rail is reinforced to increase the peel strength of the seat rail device. Improvement is required. In order to satisfy this requirement, for example, when a reinforcing bracket is welded and fixed to an upper rail in which a lock member or an anti-rattle member or the like is assembled, the lock member or rattle is caused by distortion or the like caused by the welding. The sticking prevention member or the like may not function and the quality may become unstable. In order to satisfy the above requirements, for example, increasing the thickness of the upper rail increases the rigidity (strength) of the upper rail, but increases the weight of the device and causes a problem of lack of commerciality. .

  The present invention has been made in order to solve the above-described problems. The object of the present invention is to improve rigidity without deteriorating quality even when a reinforcing bracket is welded to an upper rail. It is to provide a configuration to obtain.

In order to achieve the above object, the invention of claim 1 described in claims is
A lower rail (20) fixed to a vehicle body, an upper rail (30) fixed to a seat, and an engaging portion formed on the lower rail supported by the upper rail to engage the lower rail and the upper rail. And a roller (61) supported by the upper rail when unlocked by the lock member is guided to guide portions (22a, 22b) provided on the lower rail. A seat rail device (10) in which the upper rail is slidably assembled to the lower rail,
The upper rail includes a pair of first upper rail (31) and second upper rail (32) arranged to face each other, and the first reinforcing bracket (40a, 50a) is fixed by welding. The one upper rail and the second upper rail (32) to which the second reinforcing bracket (40b, 50b) is fixed by welding are connected by the connecting portions (33, 34).

The invention of claim 2
A lower rail (20) fixed to a vehicle body, an upper rail (30) fixed to a seat, and an engaging portion formed on the lower rail supported by the upper rail, thereby engaging the lower rail and the upper rail. And a roller (61) supported by the upper rail when unlocked by the lock member is guided to guide portions (22a, 22b) provided on the lower rail. A method of manufacturing a seat rail device (10) in which the upper rail is slidably assembled to the lower rail,
The upper rail is configured to include a pair of first upper rails (31) and second upper rails (32) arranged to face each other,
Assembling the lock member after welding and fixing the first reinforcing bracket (40a, 50a) to the first upper rail;
A step of welding and fixing a second reinforcing bracket (40b, 50b) to the second upper rail;
The first upper rail to which the lock member is assembled after the first reinforcing bracket is fixed by welding and the second upper rail to which the second reinforcing bracket is fixed by welding are connected to each other (33, 34) connecting,
It is characterized by providing.
In addition, the code | symbol in each said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  In the first aspect of the invention, the upper rail includes a pair of first upper rail and second upper rail arranged so as to face each other, and a first upper rail to which a first reinforcing bracket is fixed by welding, The second upper rail to which the two reinforcing brackets are fixed by welding is configured to be coupled by the coupling portion.

  Thereby, after the first reinforcing bracket is welded and fixed to the first upper rail or after the second reinforcing bracket is welded and fixed to the second upper rail, the first upper rail and the second upper rail are locked. By assembling the member or the like, the welding of the first reinforcing bracket or the second reinforcing bracket does not affect the assembling accuracy of the lock member or the like. Therefore, even when the reinforcing bracket is fixed to the upper rail by welding, the rigidity can be improved without degrading the quality.

  In the invention of claim 2, the lock member is assembled after the first reinforcing bracket is welded and fixed to the first upper rail, and the second reinforcing bracket is welded and fixed to the second upper rail. The first upper rail to which the lock member is assembled after the bracket for welding is fixed to the second upper rail to which the second reinforcing bracket is fixed by welding is connected by the connecting portion.

  As a result, the welding of the first reinforcing bracket or the second reinforcing bracket does not affect the assembling accuracy of the lock member or the like, so that the reinforcing bracket is welded and fixed to the upper rail. However, the rigidity can be improved without degrading the quality.

It is explanatory drawing which shows the seat slide apparatus which concerns on 1st Embodiment of this invention, FIG. 1 (A) shows a top view and FIG. 1 (B) shows a side view. 2A is a cross-sectional view showing the X1-X1 cross section of FIG. 1, and FIG. 2B is a cross-sectional view showing the X2-X2 cross section of FIG. It is a side view which shows the state which removed the lower rail from FIG. 1 (B). It is a disassembled perspective view which shows the state which decomposed | disassembled the upper rail etc. which are shown in FIG. It is a perspective view which shows a pair of front side bracket. 6A and 6B are explanatory views for explaining the detailed shape of the front bracket in FIG. 5. FIG. 6A shows a plan view, FIG. 6B shows a side view, and FIG. 6C shows a rear view. Show. It is explanatory drawing explaining the relationship between roller pitch and a lower rail width | variety. It is a perspective view which shows a pair of rear side brackets. FIG. 9A is an explanatory diagram illustrating a detailed shape of the rear bracket of FIG. 8, FIG. 9A shows a plan view, FIG. 9B shows a side view, and FIG. 9C shows a rear view. Indicates.

[First Embodiment]
Hereinafter, a seat rail device according to a first embodiment of the present invention will be described with reference to the drawings.
The seat rail device 10 according to the present embodiment is a device that fixes a vehicle seat (not shown) to a vehicle floor (not shown) so as to be slidable back and forth. As shown in FIGS. 1 to 4, the seat rail device 10 mainly includes a lower rail 20 fixed to a vehicle floor, an upper rail 30 fixed to a vehicle seat, a lower rail 20 and an upper rail 30. A lock member 70 that can be fixed (locked) so as not to be relatively movable and a rattling prevention member 80 that prevents rattling in the locked state are provided as a pair on the left and right. In addition, the seat rail device 10 includes an operation unit (not shown) that is operated to switch between a locked state of the lower rail 20 and the upper rail 30 by the pair of lock members 70 and an unlocked state that releases the locked state. ing. Hereinafter, each element which comprises the seat rail apparatus 10 is explained in full detail by making the longitudinal direction of the seat rail apparatus 10 into the front-back direction. In FIG. 1, one lower rail 20 and upper rail 30 are illustrated, and the other lower rail 20 and upper rail 30 are not illustrated for convenience.

  The lower rail 20 is formed in a long rail shape, and as shown in FIGS. 1 and 2, a bottom surface portion 21 fixed to the vehicle floor, and guide portions 22a provided on both sides of the bottom surface portion 21, respectively. 22b. The guide portions 22a and 22b guide the roller 61 and the side roller 62, which will be described later, so that the guide portions 22a and 22b are disposed so as to face each other and the upper surface 23 and the bottom surface on which the roller 61 rolls and comes into contact. 24 and a connecting surface 25 that connects the upper surface 23 and the bottom surface 24 are formed. Further, an inner surface portion 26 is connected to the guide portions 22a and 22b so as to hang down from the end portion of the upper surface 23, respectively.

  A plurality of lock member fitting holes (not shown) for fitting with the lock pieces 71a of the lock member 70 are formed along the longitudinal direction in the inner surface portion 26 connected to the guide portion 22a. A plurality of pressing member grooves (not shown) into which the pressing portion 81a of the rattling prevention member 80 can be inserted are formed in the inner surface portion 26 connected to the guide portion 22b along the longitudinal direction.

  The upper rail 30 includes a first upper rail 31 and a second upper rail 32 that are arranged as a pair of left and right, and connecting portions 33 and 34 that are assembled to the first upper rail 31 and the second upper rail 32 from the front-rear direction. It is comprised so that it may be provided.

  As shown in FIG. 2A, the first upper rail 31 includes a support portion 31a that enters the guide portion 22a. The support portion 31a has an upper surface 23 and a bottom surface of the guide portion 22a when assembled with the lower rail 20. A roller 61 that is in rolling contact with the roller 24 is rotatably supported at two locations on the front side and the rear side. Similarly, the second upper rail 32 includes a support portion 32a that enters the guide portion 22b, and the support portion 32a is in rolling contact with the upper surface 23 and the bottom surface 24 of the guide portion 22b when assembled with the lower rail 20. A roller 61 is rotatably supported at two locations on the front side and the rear side.

  As shown in FIG. 4, the front bracket 40a and the rear bracket 50a for reinforcement are welded and fixed to the front side and the rear side of the first upper rail 31, respectively. Similarly, a front bracket 40b and a rear bracket 50b for reinforcement are welded and fixed to the front side and the rear side of the second upper rail 32, respectively. The front bracket 40a and the rear bracket 50a may correspond to an example of a “first reinforcing bracket”, and the front bracket 40b and the rear bracket 50b may correspond to an example of a “second reinforcing bracket”. .

Since the front bracket 40a and the front bracket 40b have a target shape as shown in FIG. 5, the detailed shape will be described with reference to FIGS. 2B and 6 taking the front bracket 40a as an example.
As shown in FIGS. 2B and 6, the front bracket 40a has a fixing portion 41 welded and fixed to the front inner side of the first upper rail 31 and a support piece 42 whose tip end enters the guide portion 22a at a substantially right angle. It is formed so that it may continue. As for the support piece 42, the side roller 62 is rotatably supported by the front end side as a 2nd roller which roll-contacts to the connection surface 25 of the guide part 22a. Further, in order to facilitate elastic deformation of the distal end side with respect to the fixed portion 41 side, the support piece 42 is formed with a narrow width portion 42a between the fixed portion 41 and the position where the side roller 62 is supported. .

  Similarly, the front bracket 40b includes a fixed portion 41 and a support piece 42 formed with a narrow width portion 42a, and a side roller 62 that is in rolling contact with the connecting surface 25 of the guide portion 22b is rotatable on the tip side of the support piece 42. It is formed to be supported by.

  The side roller 62 is assembled to the support piece 42 so as to be pushed inward with respect to the connecting surface 25 and to be brought into rolling contact by utilizing elastic deformation of the support piece 42 starting from the narrow width portion 42a. That is, as shown in FIG. 7, the distance between the connecting surface 25 of the guide portion 22a and the connecting surface 25 of the guide portion 22b is the lower rail width W, the outer surface of the side roller 62 of the front bracket 40a before the rolling contact and the front bracket. When the distance from the outer surface of the side roller 62 of 40b is the roller pitch P, the side roller 62 is assembled to the support piece 42 so that the roller pitch P is slightly longer than the lower rail width W. For this reason, when the side roller 62 rolls into contact with the connecting surface 25, the support piece 42 elastically deforms in the direction of arrow F in FIG. 7 starting from the narrow width portion 42a, so that the side roller 62 is connected with an appropriate pressing force. It is pressed against the surface 25.

Since the rear bracket 50a and the rear bracket 50b are target shapes as shown in FIG. 8, the detailed shape will be described with reference to FIG. 9, taking the rear bracket 50a as an example.
The rear bracket 50a includes a first fixing portion 51 that is welded and fixed to the rear inner side of the first upper rail 31, a second fixing portion 52 that is welded and fixed to the rear outer side, a first fixing portion 51, and a second fixing portion. 52 is formed so as to include a connecting portion 53 that connects to 52 and a support piece 54 whose front end enters the guide portion 22a. Two openings 52 a for welding are formed in the second fixing portion 52. As for the support piece 54, the side roller 62 is rotatably supported by the front end side as a 2nd roller which roll-contacts to the connection surface 25 of the guide part 22a. In the support piece 54, a narrow width portion 54 a is formed between the connection portion 53 and the position where the side roller 62 is supported in order to facilitate elastic deformation of the distal end side with respect to the connection portion 53 side.

  Similarly, the rear bracket 50b includes a first fixing portion 51, a second fixing portion 52, a connecting portion 53, and a support piece 54 on which a narrow width portion 54a is formed. The side roller 62 that is in rolling contact with the connecting surface 25 is formed to be rotatably supported.

  The side rollers 62 in the rear bracket 50a and the rear bracket 50b are pushed inward with respect to the connecting surface 25 using the elastic deformation of the support piece 54 starting from the narrow width portion 54a so as to make rolling contact. It is assembled to the support piece 54. That is, like the side rollers 62 in the front bracket 40a and the front bracket 40b, the side rollers 62 in the rear bracket 50a and the rear bracket 50b are assembled to the support piece 54 so that the roller pitch is slightly longer than the width of the lower rail. It is done. For this reason, when the side roller 62 is brought into rolling contact with the connecting surface 25, the support piece 54 is elastically deformed in the same manner as the support piece 42 starting from the narrow width portion 54a, so that the side roller 62 is connected with an appropriate pressing force. It is pressed against the surface 25.

  The support 31a of the first upper rail 31 has two openings 31b in order to avoid interference with the side roller 62 of the front bracket 40a that is welded and the side roller 62 of the rear bracket 50a that is welded and fixed. Is formed. Similarly, two openings are provided in the support portion 32a of the second upper rail 32 in order to avoid interference with the side roller 62 of the front bracket 40b fixed by welding and the side roller 62 of the rear bracket 50b fixed by welding. 32b is formed.

  The first upper rail 31 and the second upper rail 32 are provided with connecting pieces 31d to 31g and connecting pieces 32d to 32g that are in surface contact with each other when the connecting portions 33 and 34 are used for assembly.

  The connecting portion 33 includes a fixing portion 33a for fixing the vehicle seat, an engaging hole 33b into which the connecting piece 31d and the connecting piece 32d in surface contact are fitted, and a connecting piece 31e and a connecting piece 32e in surface contact. An engagement hole 33c to be fitted is formed. The connecting portion 34 includes a fixing portion 34a for fixing the vehicle seat, an engaging hole 34b into which the connecting piece 31f and the connecting piece 32f in surface contact are fitted, and a connecting piece 31g and a connecting piece in surface contact. An engagement hole 34c into which 32g is fitted is formed.

  As shown in FIG. 4, the lock member 70 is supported and locked by a lock piece member 71 having a plurality of lock pieces 71 a, a movable member 72 for moving the lock piece member 71, and the first upper rail 31. And a fixed member 73 that rotatably supports the single member 71 and the movable member 72. The lock member 70 functions to lock the lower rail 20 and the upper rail 30 in a non-slidable manner when the lock pieces 71a are fitted in the lock member fitting holes, respectively, in a state where the operation portion is not operated. The lock member 70 is rotated by the movable member 72 in accordance with the operation of the operation unit, and the engagement between the lock pieces 71a and the lock member fitting holes is released, so that the upper rail 30 is turned into the lower rail 20. On the other hand, it functions so that it can slide back and forth.

  As shown in FIG. 4, the rattling prevention member 80 controls the pressing member 81 that presses against the upper side of the pressing member groove of the lower rail 20 to prevent rattling, and the vertical position of the pressing member 81. A pair of front and rear rotation plate members 82 and a shaft support member 83 that rotatably supports the rotation plate member 82 with respect to the second upper rail 32 are provided. In the state where the operation portion is not operated, the rattling prevention member 80 is configured such that the pressing portion 81a of the pressing member 81 that receives pressure from the rotating plate member 82 is strongly pressed against the pressing member groove, whereby the upper rail with respect to the lower rail 20 is It functions to suppress the rattling of 30. Then, the rattling prevention member 80 is configured so that the lower rail in the slidable state is released by the pressing member 81 being pushed down by the rotating plate member 82 in accordance with the operation of the operation unit and the pressing to the pressing member groove being released. It functions to release the rattling suppression of the upper rail 30 with respect to 20.

Next, a manufacturing process of the seat rail device 10 will be described.
First, as shown in FIG. 4, the front bracket 40a and the rear bracket 50a are fixed by welding to the first upper rail 31, and the front bracket 40b and the rear bracket 50b are fixed by welding to the second upper rail 32. To do. This welding is for increasing the rigidity of the upper rail 30. Specifically, the front bracket 40a to which the side roller 62 is assembled is spot-welded to the front inner side of the first upper rail 31 at the fixed portion 41 or the like. The front bracket 40b, to which the side roller 62 is assembled, is welded and fixed to the front inside of the second upper rail 32 by spot welding or the like. In addition, the rear bracket 50 a to which the side roller 62 is assembled is such that the first fixing portion 51 is spot-welded on the rear inner side of the first upper rail 31, and the second fixing portion 52 is on the rear outer side of the first upper rail 31. The two upper openings 52a are welded and fixed to the first upper rail 31 by welding. Further, in the rear bracket 50b to which the side roller 62 is assembled, the first fixing portion 51 is spot-welded on the rear inner side of the second upper rail 32, and the second fixing portion 52 is disposed on the rear outer side of the second upper rail 32. Then, welding is performed and fixed to the second upper rail 32 by welding using the two openings 52a.

  Thereafter, the two rollers 61 and the lock member 70 are assembled to the first upper rail 31 to which the front bracket 40a and the rear bracket 50a are fixed by welding, and the front bracket 40b and the rear bracket 50b are fixed by welding. The two rollers 61 and the rattling preventing member 80 are assembled to the second upper rail 32.

  Then, the connecting pieces 31d to 31g of the first upper rail 31 assembled with the lock member 70 and the like and the connecting pieces 32d to 32g of the second upper rail 32 assembled with the rattling preventing member 80 and the like were brought into surface contact. In the state, the connecting part 33 and the connecting part 34 are assembled. Then, the connecting piece 31d and the connecting piece 32d protruding from the engaging hole 33b, the connecting piece 31e and the connecting piece 32e protruding from the engaging hole 33c, the connecting piece 31f and the connecting piece 32f protruding from the engaging hole 34b, and the engaging hole 34c are protruded. The connecting piece 31g and the connecting piece 32g are welded (see the hatched area in FIG. 3).

  Thereby, as shown in FIG. 3, the upper rail 30 in a state where the brackets 40a, 40b, 50a, 50b, the lock member 70, the anti-rattle member 80, and the like are assembled is assembled. In this state, the assembly of the upper rail 30 to the lower rail 20 is completed by assembling the roller 61 and the side roller 62 so as to be guided by the guide portions 22 a and 22 b of the lower rail 20.

  In the seat rail device 10 configured as described above, the roller 61 is in rolling contact with the upper surface 23 and the bottom surface 24 at two locations in the front-rear direction of the guide portion 22a, and the upper surface 23 and The roller 61 is in rolling contact with the bottom surface 24. Further, the side roller 62 is in rolling contact with the connection surface 25 at two locations in the front-rear direction of the guide portion 22a, and the side roller 62 is in rolling contact with the connection surface 25 at two locations in the front-rear direction of the guide portion 22b. Such rolling contact realizes a low slide load at the time of sliding and suppresses rattling at the time of sliding.

  As described above, in the seat rail device 10 according to the present embodiment, the upper rail 30 includes the pair of the first upper rail 31 and the second upper rail 32 that are arranged so as to face each other, and the front bracket 40a and the rear bracket 40a. The first upper rail 31 to which the side bracket 50a is fixed by welding and the second upper rail 32 to which the front bracket 40b and the rear bracket 50b are fixed by welding are connected by connecting portions 33 and 34. .

  As a manufacturing method, the lock member 70 is assembled after the front bracket 40a and the rear bracket 50a are welded and fixed to the first upper rail 31, and the front bracket 40b and the rear bracket 50b are welded and fixed to the second upper rail 32. The first upper rail 31 to which the lock member 70 is assembled after the front bracket 40a and the rear bracket 50a are fixed by welding and the second upper rail 32 to which the front bracket 40b and the rear bracket 50b are fixed by welding are connected to each other. 33 and 34 are connected.

  As a result, the welding of the front bracket 40a and the rear bracket 50a and the welding of the front bracket 40b and the rear bracket 50b do not affect the assembling accuracy of the lock member 70 and the like. Even when the bracket is fixed by welding, the rigidity can be improved without deteriorating the quality.

[Other Embodiments]
In addition, this invention is not limited to the said embodiment etc., For example, you may actualize as follows.
(1) The front brackets 40a and 40b and the rear brackets 50a and 50b are not limited to be configured to support the side rollers 61, but are provided at predetermined portions of the first upper rail 31 and the second upper rail 32. On the assumption that the side roller 61 is supported, the side roller 61 may be excluded.

(2) The front brackets 40a and 40b are provided with a fixing portion for welding and fixing from the outside of the first upper rail 31 and the second upper rail 32 like the second fixing portion 52 of the rear brackets 50a and 50b. May be.

DESCRIPTION OF SYMBOLS 10 ... Seat rail apparatus 20 ... Lower rail 22a, 22b ... Guide part 30 ... Upper rail 31 ... 1st upper rail 32 ... 2nd upper rail 33, 34 ... Connection part 40a ... Front side bracket (1st reinforcement bracket)
40b ... Front bracket (second reinforcing bracket)
50a: Rear bracket (first reinforcing bracket)
50b ... Rear bracket (second reinforcing bracket)
61 ... Roller 62 ... Side roller 70 ... Lock member

Claims (2)

The lower rail fixed to the vehicle body and the upper rail fixed to the seat, and the lower rail and the upper rail are locked so as not to slide by engaging with an engaging portion formed on the lower rail supported by the upper rail. And a roller supported by the upper rail when being unlocked by the lock member is guided by a guide portion provided on the lower rail so that the upper rail is slidably assembled to the lower rail. A seat rail device,
The upper rail includes a pair of first upper rail and second upper rail arranged to face each other, the first upper rail to which the first reinforcing bracket is fixed by welding, and the second reinforcing bracket. A seat rail device, wherein the second upper rail to which is fixed by welding is connected by a connecting portion. The lower rail fixed to the vehicle body and the upper rail fixed to the seat, and the lower rail and the upper rail are locked so as to be non-slidable by engaging with an engaging portion formed on the lower rail supported by the upper rail. And a roller supported by the upper rail when being unlocked by the lock member is guided by a guide portion provided on the lower rail so that the upper rail is slidably assembled to the lower rail. A method for manufacturing a seat rail device, comprising:
The upper rail is configured to include a pair of a first upper rail and a second upper rail arranged to face each other.
Assembling the lock member after welding and fixing the first reinforcing bracket to the first upper rail;
A step of welding and fixing a second reinforcing bracket to the second upper rail;
The first upper rail to which the lock member is assembled after the first reinforcing bracket is fixed by welding and the second upper rail to which the second reinforcing bracket is fixed by welding are connected by a connecting portion. Process,
A method for manufacturing a seat rail device.

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