JP5646901B2 - Reclining device manufacturing method - Google Patents

Description

The present invention relates to a process for the preparation of lapis lazuli recline device location to enable / disable the tilting of the seatback relative to the seat cushion.

  A disk-shaped first member and a disk-shaped second member laminated on the first member and rotatable relative to the first member, the relative rotation of the first member and the second member In the reclining device that prohibits / permits, an outer peripheral ring that holds the stacked state of the first member and the second member is provided on the periphery of the first member and the second member.

  The outer peripheral ring is formed on the outer peripheral surface of the first member, the cylindrical portion facing the outer peripheral surface of the second member, one end side of the cylindrical portion, the first clamping portion sandwiching the first member, and the other end of the cylindrical portion And a second sandwiching part that sandwiches the second member.

  As a manufacturing method of the outer peripheral ring, there are the following methods.

 (1) A circular ring is punched out of a plate material, and the punched circular ring is pressed to form a cylindrical part and a first clamping part. This is assembled to the laminated first member and second member, and the second clamping portion is formed by caulking.

 (2) The strip material is pressed to form the cylindrical portion, the first clamping portion, and the second clamping portion. This is wound along the outer peripheral part of the laminated | stacked 1st member and 2nd member (for example, refer patent document 1).

JP 2009-1655582 A

  However, the manufacturing methods (1) and (2) described above have the following problems.

 (1) The outer peripheral ring to be assembled to the laminated first member and second member is a ring, a cylindrical portion and a first sandwiching portion are formed, and the cross-sectional shape is substantially L-shaped, so the rigidity is high, It is difficult to elastically deform in the radial direction (the reduced diameter direction, the increased diameter direction). On the other hand, since the gap between the cylindrical portion of the outer ring and the outer surfaces of the first member and the second member is set narrow, the outer ring is caught on the outer surfaces of the first member and the second member stacked. Assembly errors such as assembly are likely to occur.

  In addition, since the ring is formed by punching the plate material, burrs are generated on the punched surface, and the life of the mold forming the first sandwiching portion and the second sandwiching portion is shortened.

 (2) After winding the outer ring along the outer periphery of the stacked first member and second member, a springback occurs, the contact area between the first holding part and the first member, the second holding The contact area between the first member and the second member is reduced, and the retention failure of the stacked state of the first member and the second member occurs.

The present invention has been made in view of the above problems, and an object thereof is assembled in easy, long mold life, retention failure in a stacked state between the first member and the second member is not such generated It is to provide a method for producing a peripheral ring of Li recline device.

The invention according to claim 1 includes a disk-shaped first member, a disk-shaped second member laminated on the first member and rotatable relative to the first member, the first member, and the first member. A cylindrical portion opposed to the peripheral surface of the two members, a first clamping portion formed on one end side of the cylindrical portion and sandwiching the first member; a second clamping portion formed on the other end side of the cylindrical portion and sandwiching the second member A reclining device having two clamping portions and having an outer peripheral ring for holding the laminated state of the first member and the second member, and prohibiting / permitting relative rotation of the first member and the second member In the manufacturing method, the outer peripheral ring is formed of a long plate material in a cylindrical shape so that a slit along the stacking direction of the first member and the second member is formed from the outer peripheral surface to the inner peripheral surface. One end side of the plate material formed into a cylindrical shape is pressed to form the first clamping portion, and the cylindrical portion, In the manufacturing method of the reclining device, the second clamping part is formed by assembling the laminated first and second members in the state in which the first clamping part is formed, and caulking. is there.

The invention according to claim 2, the portion serving as the second sandwiching portion by caulking, in advance, of the reclining device according to claim 2, wherein the previously formed a caulking habit part fallen in the caulking direction It is a manufacturing method.

  According to the invention of claim 1, the outer peripheral ring has a slit formed from the outer peripheral surface to the inner peripheral surface along the stacking direction of the first member and the second member, so that the radial direction ( Easily elastically deformed in the direction of diameter expansion and diameter reduction. Therefore, even if the clearance between the cylindrical portion of the outer ring and the outer surfaces of the first member and the second member is set to be narrow, the outer ring is laminated by elastically deforming the outer ring in the diameter increasing direction. Assembling mistakes such as being assembled in a state where it is caught on the outer peripheral surface of the member and the second member are unlikely to occur, and the assembling becomes easy.

  In addition, since the second clamping portion is formed by caulking prevention processing, when the second clamping portion is formed, the portion that the mold hits is also the side surface in the longitudinal direction of the band material, and burrs are generated. Absent. Therefore, the life of the mold that forms the second clamping portion is also extended.

According to the invention according to claims 1 to 2, the peripheral ring, the first member, since the slit along the stacking direction of the second member is formed along the inner peripheral surface from the outer peripheral surface, radial ( Easily elastically deformed in the diameter expansion direction and diameter reduction direction Therefore, even if the clearance between the cylindrical portion of the outer ring and the outer surfaces of the first member and the second member is set to be narrow, the outer ring is laminated by elastically deforming the outer ring in the diameter increasing direction. Assembling mistakes such as being assembled in a state where it is caught on the outer peripheral surface of the member and the second member are unlikely to occur, and the assembling becomes easy.

  Further, the outer ring is assembled to the first member and the second member by assembling the first member and the second member which are laminated in a state where the cylindrical portion and the first clamping portion are formed. Compared to the case of winding along the outer peripheral portion, there is no occurrence of springback, so that the retention failure of the laminated state of the first member and the second member does not occur.

  The outer ring was formed by cutting a long strip and forming the cut strip into a cylindrical shape. Therefore, when one end side of the strip formed into a cylindrical shape is pressed to form the first sandwiching portion, the portion where the mold hits is a side surface in the longitudinal direction of the strip, There is no occurrence. Therefore, the life of the mold that forms the first clamping portion is extended.

  Similarly, when the second clamping part is formed by caulking, the part that the mold hits is also the side surface in the longitudinal direction of the strip, and no burrs are generated. Therefore, the life of the mold that forms the second clamping portion is also extended.

According to the second aspect of the present invention, the caulking can be easily prevented by forming the caulking portion that has fallen in the caulking prevention direction in advance in the portion that becomes the second clamping portion by caulking.

It is a disassembled perspective view of the reclining apparatus of embodiment. It is the disassembled perspective view which looked at the reclining apparatus of FIG. 1 from another direction. It is the front view which looked at the reclining apparatus of the assembled state from the ratchet side. FIG. 4 is a cross-sectional view taken along a cutting line AA in FIG. 3. FIG. 4 is a cross-sectional view taken along a cutting line BB in FIG. 3. It is a front view of the outer periphery ring before a cylinder part and a 1st clamping part are formed and assembled | attached to the laminated | stacked lower arm and a ratchet. FIG. 7 is a cross-sectional view taken along a cutting line CC in FIG. 6. It is a figure explaining cutting of a strip. It is a figure explaining a cylindrical strip. It is sectional drawing of the reclining apparatus with which the laminated | stacked lower arm and ratchet, and the outer periphery ring in which the cylinder part and the 1st clamping part were formed were assembled | attached. In FIG. 10, it is a figure explaining the caulking stop (auxiliary bending) performed with respect to the caulking part. In FIG. 11, it is a figure explaining the caulking stop (this caulking) performed with respect to the caulking part.

  Next, embodiments of the present invention will be described with reference to the drawings.

  Initially, the whole structure of the reclining apparatus of this embodiment is demonstrated using FIG. 1, FIG. FIG. 1 is an exploded perspective view of the reclining device of the present embodiment, and FIG. 2 is an exploded perspective view of the reclining device of FIG. 1 viewed from another direction.

  In the reclining device of this embodiment, the disc-shaped lower arm (first member) 101 is provided on the seat cushion side of the seat, and the disc-shaped ratchet (second member) 201 is provided on the seat back side of the seat.

  A hole 103 and a hole 203 are formed in a portion through which the rotation center axis O of the lower arm 101 and the ratchet 201 passes. A shaft (not shown) that is rotationally driven by an operating force is inserted through these holes 103 and 203.

  As shown in FIG. 2, a substantially circular concave portion 205 centering on the rotation center axis O of the ratchet 201 is formed on the surface of the ratchet 201 facing the lower arm 101. 207 is engraved.

  Between the lower arm 101 and the ratchet 201, a pair of poles 301 and 301 'in which outer teeth 303 that can mesh with the inner teeth 207 are formed.

  As shown in FIG. 1, a recess 105 is formed on the surface of the lower arm 101 facing the recess 205 of the ratchet 201. The bottom surface of the recess 105 is parallel to the rotation plane of the ratchet 201. The bottom surface of the recess 105 is provided so as to sandwich the two sides of the poles 301 and 301 ′, and guides the poles 301 and 301 ′ in the radial direction of the circle centering on the rotation center axis O of the ratchet 201. A pair of pole guides 111, 113, 111 ′, 113 ′ for engaging / separating the outer teeth 303 of the pole 301 with the inner teeth 207 are formed.

  A first cam 401 is disposed between the lower arm 101 and the ratchet 201. The first cam 401 can rotate around the rotation center axis O of the ratchet 201 and is disposed closer to the rotation center axis O than the poles 301 and 301 ′. An oval hole 403 is formed at the center of the first cam 401.

  Here, the pole 301 and the first cam 401 will be described. Since the pole 301 and the pole 301 'have the same structure, the description of the pole 301' is omitted.

  The pole 301 is formed with a storage portion 307 having an opening 305 on one side portion of two side portions along the radial direction of a circle around the rotation center axis O.

  A guide protrusion 331 is formed on the surface of the pole 301 that faces the lower arm 101. On the other hand, the lower arm 101 is formed with a guide groove 131 that extends in the radial direction of a circle centering on the rotation center axis O of the ratchet 201 and that the guide protrusion 331 is movably engaged with. The pawl 301 is also guided in the radial direction of the circle about the rotation center axis O of the ratchet 201 by the engagement of the guide protrusion 331 of the pawl 301 with the guide groove 131.

  A cylindrical second cam 501 (501 ') is disposed in the storage portion 307 (307') of the pole 301 (301 '). Since the second cam 501 and the second cam 501 'have the same structure, the description of the second cam 501' is omitted.

  The first cam 401 includes a stopper projection 431 extending into the space between the pole guide 111 and the pole guide 113 ′, and a stopper projection 431 ′ extending into the space between the pole guide 113 and the pole guide 111 ′. And are formed. The range in which the stopper projection 431 contacts the standing wall surface of the pole guide 111 and the standing wall surface of the pole guide 113 ′, and the range in which the stopper projection 431 ′ contacts the standing wall surface of the pole guide 113 and the standing wall surface of the pole guide 111 ′. Thus, the first cam 401 is rotatable.

  A disc-shaped release plate 601 is disposed between the first cam 401 and the ratchet 201. An oval hole 603 having the same shape as the hole 403 of the first cam 401 is formed at the center of the release plate 601. On the other hand, on the surface of the first cam 401 facing the release plate 601, two protrusions 411 that protrude in the direction of the release plate 601 across the rotation center axis O are formed. The protrusion 411 is engaged with a hole 604 formed in the peripheral portion of the oval hole 603 of the release plate 601.

  Further, a hole 602 through which a wire spring, which will be described later, is inserted is formed in the periphery of the oval hole 603 of the release plate 601.

  The cross-sectional shape of the shaft (not shown) that is rotationally driven by the operating force described above is an oval shape, and the release plate 601 and the first cam 401 are inserted through the hole 603 of the release plate 601 and the hole 403 of the first cam 401. And rotate together.

  The release plate 601 is formed with a second cam guide 611 (611 ') with which the second cam 501 (501') is engaged. When the second cam guide 611 rotates in a direction in which the first cam 401 in contact with the second cam 501 separates, the second cam 501 moves from the inner wall surface on the outer tooth 303 side of the storage portion 307 to the first cam 401 side. The inner wall surface of the first cam 401 is guided in the direction of pushing the inner wall surface of the first cam 401.

  A wire spring 701 (701 ') is disposed between the release plate 601 and the ratchet 201. One end of the wire spring 701 is inserted into the hole 605 of the release plate 601 and is locked in a hole 101 a formed in the lower arm 101. The other end of the wire spring 701 is inserted into the hole 602 of the release plate 601 and is locked in the hole 404 formed in the first cam 401. The pole 301 is biased in the direction in which the external teeth 303 are engaged with the internal teeth 207 of the ratchet 201 by the biasing force of the wire spring 701 via the first cam 401.

  As shown in FIGS. 3 to 5, the lower arm 101 and the ratchet 201 are stacked so as to sandwich the pole 301, the first cam 401, the second cam 501, the release plate 601, and the spring 701, and the lower arm 101 and the ratchet The outer peripheral portion of 201 is held in a laminated state by the outer peripheral ring 801. 3 is a front view of the assembled reclining device as seen from the ratchet side, FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 5 is a cross-sectional view taken along the line BB in FIG. FIG.

  The outer peripheral ring 801 of the present embodiment is formed on the outer peripheral surface of the lower arm (first member) 101, the cylindrical portion 803 facing the outer peripheral surface of the ratchet (second member) 201, and one end side of the cylindrical portion 803. A first sandwiching portion 805 that abuts against the end surface of the cylindrical portion 803, and a second sandwiching portion 807 that abuts against the end surface of the ratchet 201. Further, the outer ring 801 is formed with slits 809 extending from the outer peripheral surface to the inner peripheral surface along the stacking direction of the lower arm 101 and the ratchet 201.

Next, the operation of the above configuration will be described.
(Locked state)
Due to the urging force of the spring 701 (701 ′), the first cam 401 pushes the second cam 501, and the second cam 501 pushes the inner wall surface on the outer tooth 303 side of the storage portion 307 of the pole 301.

When the second cam 501 presses the inner wall surface of the pole 301 on the side of the outer teeth 303 of the storage portion 307, the outer teeth 303 of the pole 301 mesh with the inner teeth 207 of the ratchet 201, and the base arm ( Rotation relative to the lower arm 101) is prohibited.
(Release start)
When the first cam 401 is rotated in the direction away from the second cam 501 against the urging force of the spring 701 (701 ′), the second cam 501 is moved from the inner wall surface of the storage portion 307 on the outer tooth 303 side to the first cam. It moves to the inner wall surface on the 401 side and pushes the inner wall surface on the first cam 401 side.

  When the second cam 501 pushes the inner wall surface of the storage portion 307 of the pole 301 on the first cam 401 side, the pole 301 moves to the rotation center axis O side, and the outer teeth 303 of the pole 301 become the inner teeth 207 of the ratchet 201. And the unlocked state is permitted in which the upper arm is allowed to rotate with respect to the base arm.

  Here, the manufacturing method of the outer periphery ring 801 is demonstrated.

  First, as shown in FIG. 8, a long strip is cut to manufacture a strip 811 having a set length. Burrs due to cutting are generated on the cut surfaces 811a and 811b of the band material 811. Burr is not generated on the surfaces other than the cut surfaces 811a and 811b.

  Next, as shown in FIG. 9, the band material 811 is curled so that the cut surfaces 811 a and 811 b face each other via a gap 810 to form a cylindrical shape.

  Next, as shown in FIGS. 6 and 7, one end side of a cylindrical band member 811 is press-molded to manufacture an outer peripheral ring 801 in which a cylindrical portion 803 and a first clamping portion 805 are formed. A gap (see FIG. 9) formed in the cylindrical strip 811 becomes a slit 809 formed from the outer peripheral surface to the inner peripheral surface along the direction of the rotation center axis of the lower arm 101 and the ratchet 201.

  Further, in the present embodiment, a portion 807a that falls down inside the cylinder is formed in a portion that becomes the second clamping portion 807 of the cylinder portion 803.

  Then, as shown in FIG. 10, the pole 301, the first cam 401, the second cam 501, the release plate from the caulking portion 807a side of the outer peripheral ring 801 in which the cylindrical portion 803 and the first clamping portion 805 are formed. The lower arm 101 and the ratchet 201 stacked so as to sandwich the spring 701 and the ratchet 201 are inserted and assembled together. At the time of assembling, the outer ring 801 is elastically deformed in the diameter-expanding direction so that the caulking portion 807a does not interfere with the laminated lower arm 101 and ratchet 201, and the two are assembled.

  Next, the outer peripheral ring 801 is caulked. As shown in FIG. 11, the assembled lower arm 101, ratchet 201, and outer ring 801 are set on a fixed die 901, moved in the vertical direction (in the direction of arrow D in the figure), and the inclined surface 903a is moved with respect to the moving direction. The first punch 903 has auxiliary bending with respect to the caulking portion 807a of the outer ring 801. At this time, an annular caulking mark 807b is formed on the caulking portion 807a by the inclined surface 903a of the first punch 903 (see FIG. 2).

  Then, as shown in FIG. 12, the second punch 905 that moves in the vertical direction (in the direction of the arrow ED in the drawing) and has a caulking surface 905a of 90 ° with respect to the moving direction is applied to the caulking portion 807a of the outer peripheral ring 801. Book caulking against it. By this caulking, the caulking portion 807 a is formed on the other end side of the cylindrical portion 803 and becomes the second clamping portion 807 that abuts against the end surface of the ratchet 201.

  The outer peripheral ring 801 manufactured by the above method has the following effects.

 (1) Since the slit 809 is formed in the outer peripheral ring 801, the outer ring 801 is easily elastically deformed in the radial direction (the diameter increasing direction and the diameter decreasing direction). Therefore, even if the gap between the cylindrical portion 803 of the outer ring 801 and the outer surfaces of the lower arm 101 and the ratchet 201 is set narrow, the outer ring 801 is laminated by elastically deforming the outer ring 801 in the diameter increasing direction. Assembly errors such as assembly in a state where the lower arm 101 and the ratchet 201 are caught on the outer peripheral surface are less likely to occur, and the assembly is facilitated.

 (2) With the cylindrical portion 803 and the first clamping portion 805 formed, the outer ring is wound along the laminated lower arm 101 and ratchet 201 by assembling the laminated lower arm 101 and ratchet 201. Compared to the case, there is no occurrence of springback, so that there is no failure in maintaining the laminated state of the lower arm 101 and the ratchet 201.

 (3) The outer ring 801 to be assembled to the laminated lower arm 101 and ratchet 201 was obtained by cutting a long strip and forming the cut strip 811 into a cylindrical shape. Therefore, when one end side of the strip 811 formed into a cylindrical shape is pressed to form the first sandwiching portion 805, the portion that the mold hits is a surface other than the cut surfaces 811a and 811b of the strip 811. No burr is generated. Therefore, the life of the mold for forming the first clamping part 805 is extended.

  Similarly, when the second sandwiching portion 807 is formed by caulking, the portion where the first punch 903 and the second punch 905 hit is also the side surface in the longitudinal direction of the band material, and no burrs are generated by cutting. Therefore, the lifetimes of the first punch 903 and the second punch 905 that form the second clamping unit 807 are also extended.

 (4) Caulking can be easily prevented by forming in advance a caulking portion 807a that has fallen in the caulking prevention direction at a portion that becomes the second clamping portion 807 by caulking.

101 base arm 201 ratchet 301 pole 307 groove 309 lock inner wall surface 311 unlock inner wall surface 401 first cam 501 second cam 601 release plate 611 second cam guide 701 spring 801 outer ring

Claims (2)

A disk-shaped first member;
A disc-shaped second member laminated on the first member and rotatable relative to the first member;
The first member, a cylindrical portion facing the peripheral surface of the second member, formed on one end side of the cylindrical portion, a first clamping portion sandwiching the first member, formed on the other end side of the cylindrical portion, An outer peripheral ring having a second sandwiching portion for sandwiching the second member, and holding a laminated state of the first member and the second member;
In the manufacturing method of the reclining device which prohibits / permits relative rotation of the first member and the second member,
The outer ring is
The long plate material is formed into a cylindrical shape so that the slit along the stacking direction of the first member and the second member is formed from the outer peripheral surface to the inner peripheral surface,
One end side of the plate material formed into a cylindrical shape is pressed to form the first sandwiching portion,
In the state where the tube portion and the first clamping portion are formed, the first member and the second member stacked are assembled,
A method of manufacturing a reclining device , wherein the second clamping portion is formed by caulking . In the portion that becomes the second clamping portion by caulking,
2. The method of manufacturing a reclining device according to claim 1, wherein a caulking portion that falls in a caulking stop direction is formed in advance .

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