JP6160511B2 - Slide rail - Google Patents

Description

  The present invention relates to a slide rail. More specifically, the present invention relates to a slide rail that connects a vehicle seat so as to be slidable with respect to a floor.

  Conventionally, as a slide rail for a vehicle seat, there is known a configuration having a lower rail attached on a floor and an upper rail attached to the vehicle seat so as to be slidable back and forth with respect to the lower rail. (Patent Document 1).

JP 2004-155242 A

  However, in the rail structure as described above, when the upper rail protrudes forward and backward from the lower rail by sliding, the protruding portion may be bent by the weight of the seat, and the slidability of the upper rail may be deteriorated. The present invention was devised as a solution to the above problem, and the problem to be solved by the present invention is to make it difficult to deteriorate the slidability of the upper rail even if the upper rail protrudes from the lower rail by sliding. It is in.

In order to solve the above problems, the slide rail of the present invention takes the following means.
1st invention is a slide rail which connects the sheet | seat for vehicles to the state which can be slid with respect to a floor. The slide rail includes a lower rail mounted on the floor, an upper rail mounted on the vehicle seat so as to be slidable on the lower rail, and a slide stopper unit mounted between the rails to stop these slides. Have. The upper rail is configured to be able to slide in an area protruding in the sliding direction with respect to the lower rail. A protruding portion that protrudes in the direction of gravity from the lower rail of the upper rail in the sliding direction is provided with a protruding portion that protrudes in the direction of gravity and suppresses the bending of the protruding portion in the direction of gravity.

  According to the first aspect of the present invention, even if the upper rail slides and protrudes from the lower rail, the protruding portion can suppress the bending of the protruding portion in the gravity direction. Therefore, the slidability of the upper rail can be prevented from being deteriorated.

  The second invention is the following configuration in the first invention described above. The projecting portion is configured to include a roller that is grounded in the direction of gravity and rolls as the upper rail slides.

  According to the second aspect of the present invention, even if the projecting portion is grounded in the gravity direction, the roller rolls as the upper rail slides, so that the slidability of the upper rail can be prevented from being deteriorated.

  The third invention is the following configuration in the first or second invention described above. The lower rail is formed with a recess capable of receiving the protruding portion in the sliding direction.

  According to the third aspect of the invention, since the projecting portion is received in the sliding direction in the recess of the lower rail, the upper rail can be slid widely in the receiving direction.

It is a schematic perspective view of the vehicle seat to which the slide rail of Example 1 is applied. It is a disassembled perspective view of a slide rail. It is the disassembled perspective view which expanded and represented the attachment location of the bending prevention unit. It is a side view of a slide rail. It is a bottom view of a slide rail. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4. It is the VII-VII sectional view taken on the line of FIG.

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

  First, the structure of the slide rail 10 of Example 1 is demonstrated using FIGS. As shown in FIG. 1, the slide rail 10 according to the present embodiment is configured to connect a single seat 1 mounted on a railway vehicle so as to be slidable with respect to a floor F. The seat 1 includes a seat back 2 that serves as a backrest for a seated occupant and a seat cushion 3 that serves as a seating portion. The above-described slide rails 10 are provided in a pair of left and right between the above-described seat cushion 3 and the floor F, and are respectively connected to a state in which the seat 1 is slid in the front-rear direction with respect to the floor F. ing.

  Each of the slide rails 10 described above is driven at a position where the seat 1 is slid back and forth with respect to the floor F by driving or stopping the electric motor M disposed between them. It has a configuration that can be stopped. Hereinafter, a specific configuration of each slide rail 10 described above will be described in detail with reference to FIGS. As shown in FIG. 2, each slide rail 10 includes a lower rail 11, an upper rail 12, a pair of left and right resin shoes 13, a deflection preventing unit 30, and a feed screw unit 20. Here, the feed screw unit 20 corresponds to the “sliding stop unit” of the present invention, and the bending prevention unit 30 corresponds to the “projecting portion” of the present invention.

  The lower rail 11 is formed by bending a single sheet of steel plate that is long in the front-rear direction in several directions in the short-side direction. The lower rail 11 is integrally fixed to a position raised on the base F 40, which is long on the front and rear direction of the steel plate, installed on the floor F via the front and rear legs 41. It is supposed to be in a state. Each of the above-described base brackets 40 is provided in a state of being bolted and fixed integrally on the floor F.

  In addition, each leg 41 described above is formed of an L-shaped steel plate material, and each L-shaped leg piece is grounded on the base bracket 40, and the other leg piece is fixed to the base bracket 40. As a state of being grounded on an edge bent and raised at the side portion, a state in which they are welded and integrally coupled to each other is provided. And the lower rail 11 mentioned above is set so that it may straddle between the upper surface parts of each leg 41 mentioned above, and it is set as the state couple | bonded by bolt fastening to these.

  The lower rail 11 described above is formed in a shape in which the cross-sectional shape thereof is substantially uniform in the longitudinal direction. Specifically, as shown in FIGS. 2 and 7, the lower rail 11 includes a bottom surface portion 11 </ b> A installed on the floor F (base bracket 40) with its surface facing the seat upper side, and both left and right sides of the bottom surface portion 11 </ b> A. And a pair of left and right lower fin portions 11B that are bent in an inverted U shape on the inward sides of the sheet.

  As shown in FIG. 2, the upper rail 12 is formed by bending a sheet of steel sheet that is long in the front-rear direction and is bent in the short-side direction in the same manner as the lower rail 11 described above. The above-described upper rail 12 is assembled into a state in which the upper rail 12 is slidable in the longitudinal direction with respect to the lower rail 11 by being inserted into the lower rail 11 from the opening end portion on either side in the longitudinal direction of the lower rail 11 described above. Has been.

  As shown in FIG. 7, the upper rail 12 described above includes a pair of left and right vertical surface portions 12A extending in the height direction through the gap 11F between the left and right lower fin portions 11B of the lower rail 11, and the vertical rails 12A. The top plate portion 12B having a cross-sectional shape spanned between the upper end portions of the surface portion 12A and facing the upper side of the sheet, and the U-shaped warp outward from the lower end portions of the respective vertical surface portions 12A. It is formed in the cross-sectional shape which has a pair of left and right upper side fin part 12C made into the shape bent back.

  The above-described upper rail 12 has left and right upper side fin portions 11C bent back in the U-shape with respect to the above-described lower rail 11, and left and right lower side fin portions 11B bent back in the inverted U-shape of the lower rail 11. It is inserted and assembled in the axial direction so as to engage with each other. By being assembled in this way, the upper rail 12 is supported from the lower side by the bottom surface portion 11A with respect to the lower rail 11, and the seat is formed by the above-described engagement structure between the left and right upper side fin portions 12C and the lower side fin portion 11B. It is set as the state assembled | attached to the state in which peeling to the upper side was prevented.

  As shown in FIG. 2, a plurality of steel balls 13 </ b> A serving as rolling elements are provided between the left and right upper fin portions 12 </ b> C of the upper rail 12 and the left and right lower fin portions 11 </ b> B of the lower rail 11. A pair of left and right resin shoes 13 provided with rollers 13B are provided. Each of these resin shoes 13 is formed of a resin member that is long in the front-rear direction having an L-shaped cross section, and a plurality of steel balls 13A are formed along the upper surface portion of the L-shaped portion extending in the vertical direction. The roller 13B is fitted from the upper side and arranged in the front-rear direction, and a plurality of rollers 13B are fitted from the upper side and arranged in the front-rear direction along the L-shaped portion extending in the lateral direction. It has a configuration.

  As shown in FIG. 7, each of the resin shoes 13 described above has an L-shaped cross section between the left and right upper fin portions 12 </ b> C of the upper rail 12 and the left and right lower fin portions 11 </ b> B of the lower rail 11. The upper rail 12 functions so as to suppress backlash in the height direction and the width direction with respect to the lower rail 11. Further, each steel ball 13A assembled to the L-shaped upper surface portion of each resin shoe 13 is applied to the upper surface portion of the left and right lower fin portions 11B of the lower rail 11 from the lower side, and the upper rail 12 with respect to the lower rail 11 The slide is made smooth by rolling. Each roller 13B assembled to the L-shaped laterally extending portion of each resin shoe 13 is also applied to the bottom surface portion of the left and right upper fin portions 12C of the upper rail 12 and the bottom surface portion 11A of the lower rail 11. The sliding of the upper rail 12 with respect to the lower rail 11 is made smooth by rolling.

  As shown in FIG. 2, the feed screw unit 20 includes a round bar-shaped feed screw shaft 21, a gear unit 22 that transmits the driving force output from the electric motor M to the feed screw shaft 21, and a screw on the feed screw shaft 21. And a combined nut body 23.

  The above-described feed screw shaft 21 is in a state in which the axial direction extends in the sliding direction of the upper rail 12, and the front end portion thereof is inserted into the gear unit 22 assembled to the front end portion of the upper rail 12, and the worm (not shown) It is integrally connected to the wheel, and the rear end portion is provided in a state where the rear end portion is connected to the bearing member 21A assembled to the rear end portion of the upper rail 12 so as to be rotatable. The gear unit 22 and the bearing member 21 </ b> A described above are integrally assembled with the upper rail 12.

  The gear unit 22 described above has a configuration in which a worm and a worm wheel (not shown) are assembled in a box-shaped gear box 22A so that power can be transmitted in directions orthogonal to each other. The above-described gear unit 22 is connected to the above-described worm (not shown) by inserting and connecting the end of the connecting rod Mr directly connected to the above-described electric motor M, and the rotational driving force transmitted from the electric motor M to the worm. Is transmitted to the feed screw shaft 21 via a worm wheel.

  As shown in FIG. 3, the gear unit 22 has a leg piece on one side of an L-shaped bracket 22B attached to the rear surface of the gear box 22A, and the other side of the L-shaped bracket 22B. Are attached to the front end portion of the top plate portion 12B of the upper rail 12 from above and fastened with bolts 22B1, so that the leg pieces are integrally assembled to the front end portion of the upper rail 12. 2 is attached to the rear end portion of the top plate portion 12B of the upper rail 12 from the lower side and is bolted to the same portion. It is made into the state assembled | attached integrally.

  As shown in FIG. 3, the nut body 23 includes a rectangular pedestal 23A, a square nut 23B assembled to the upper surface of the pedestal 23A, and a holder 23C for fixing the square nut 23B to the pedestal 23A. The pedestal 23 </ b> A described above is set on the bottom surface portion 11 </ b> A of the lower rail 11 and is integrally fastened on the bottom surface portion 11 </ b> A of the lower rail 11 by a bolt 23 </ b> D inserted from the lower side of the lower rail 11. Further, the holder 23C is formed of a resin plate bent into a substantially inverted U shape in cross section, and an opening 23C1 into which the square nut 23B can be fitted from above is formed in a bent portion at the center. It has been configured.

  In the above-described holder 23C, with the square nut 23B fitted in the opening 23C1, the feed screw shaft 21 is inserted and screwed into the female screw hole of the square nut 23B exposed inside the inverted U-shape. Thus, the square nut 23B is assembled in a state where it does not come off from the opening 23C1. The holder 23C has a claw portion 23C2 formed at each central portion of the two pieces so that a base 23A fixed on the bottom surface portion 11A of the lower rail 11 is fitted between the two pieces extending downward. Is inserted into each through hole 11A2 formed in the bottom surface portion 11A of the lower rail 11 to be fitted to the lower rail 11 so as not to rotate. As a result, the square nut 23 </ b> B is provided on the bottom surface portion 11 </ b> A of the lower rail 11 so as not to rotate and to be fixed in position.

  As shown in FIG. 2, the feed screw unit 20 configured as described above has the upper rail 12 that supports the feed screw shaft 21 as the feed screw shaft 21 receives the driving force from the electric motor M and rotates. The nut body 23 is fed in the front-rear direction to slide with respect to the lower rail 11 that supports the nut body 23 at a fixed position. Further, the feed screw unit 20 is configured to hold the upper rail 12 in a stopped state by the braking force by stopping the driving of the electric motor M described above. The movable range of the slide of the upper rail 12 with respect to the lower rail 11 is a range in which the above-described feed screw shaft 21 can be screwed with respect to the square nut 23B. By the movement in the movable range, the upper rail 12 can move in a region where the shape protrudes from the lower rail 11 in the front-rear direction (see FIG. 4).

  However, for example, when the upper rail 12 slides to a region projecting forward from the lower rail 11, the projecting portion 12 </ b> D on the front side of the projecting upper rail 12 is easily bent downward by the action of the load received from the seat 1. Therefore, the slidability of the upper rail 12 may be deteriorated. Therefore, in the present embodiment, in order to suppress the downward deflection of the overhanging portion 12D on the front side of the upper rail 12, the overhang protrudes from the front end portion of the upper rail 12 to the lower side of the upper rail 12 (gravity direction). A deflection preventing unit 30 that functions to suppress the deflection of the portion 12D in the direction of gravity is provided.

  As shown in FIGS. 3 to 5, the bending prevention unit 30 described above is applied to the lower surface of the top plate portion 12B on the front end side of the upper rail 12 and the above-described gear unit 22 is assembled to the front end portion. The fastening bolt 22B1 passed from the upper side is passed through the L-shaped bracket 22B and caulked so that the L-shaped bracket 22B and the top plate portion 12B of the upper rail 12 are integrally coupled together. Has been. Specifically, the anti-deflection unit 30 is provided between a support tool 31 formed of an inverted U-shaped steel plate and a leg portion of the support tool 31 and is rotatably supported by a support shaft 32A. And a roller 32.

  The U-shaped top plate surface portion of the support 31 is applied to the top plate portion 12B of the upper rail 12 from the lower side, and is integrally coupled to the top plate portion 12B by the bolt 22B1 described above. It is in a state. Further, the roller 32 is provided at a position sandwiched between the both leg portions of the support 31 described above, and is supported by a support shaft 32A inserted between the lower end portions of the both leg portions, whereby the shape of the roller 32 is increased. A part of the support tool 31 protrudes downward from the support tool 31. As a result, the roller 32 is located in a region immediately below the central portion in the width direction of the upper rail 12, protrudes downward from the lower rail 11, and is always provided in a state of being grounded on the upper surface portion of the base bracket 40. (See FIGS. 4 to 5).

  As shown in FIG. 4, as shown in FIG. 4, the upper rail 12 slides to a region projecting forward from the lower rail 11 by providing the anti-deflection unit 30 to the front protruding portion 12 </ b> D of the upper rail 12. In addition, since the roller 32 of the above-described deflection preventing unit 30 is grounded on the base bracket 40, the downward deflection of the overhanging portion 12D of the upper rail 12 can be suppressed. The deflection preventing unit 30 is grounded on a steel plate base bracket 40 installed on the floor F, so that the overhanging portion 12D of the upper rail 12 on the base bracket 40 without being buried in the base bracket 40. Is strongly supported from below.

  Further, even if the anti-deflection unit 30 is provided on the base bracket 40 at all times by being configured by a roller 32 capable of rolling at a portion grounded on the base bracket 40, The roller 32 can be moved smoothly while following the sliding movement of the upper rail 12. Thereby, the bending of the overhanging portion 12D can be appropriately suppressed without impeding the slidability of the upper rail 12.

  Here, as shown in FIGS. 2 and 5 to 6, the front end portion of the bottom surface portion 11 </ b> A of the lower rail 11 receives the support 31 and the roller 32 of the above-described deflection preventing unit 30 from the front side. A recess 11A1 is formed. By forming the concave portion 11A1, the region of the overhanging portion 12D of the upper rail 12 provided with the deflection preventing unit 30 can be retracted to the rear side to the position where the shape overlaps the lower rail 11, and the upper rail 12 Can be slid widely rearward with respect to the lower rail 11.

  As described above, the slide rail 10 of this embodiment includes the lower rail 11 attached on the floor F (on the base bracket 40), and the upper rail 12 attached to the seat 1 so as to be slidable on the lower rail 11. And a feed screw unit 20 (sliding stop unit) assembled between the rails 11 and 12. The upper rail 12 can slide on the lower rail 11 in a region protruding in the sliding direction. An overhang portion 12D that protrudes from the lower rail 11 of the upper rail 12 in the sliding direction is provided with a deflection preventing unit 30 (protrusion portion) that protrudes in the gravity direction and suppresses the deflection in the gravity direction of the overhang portion 12D.

  Since the slide rail 10 of the present embodiment has such a configuration, even if the upper rail 12 slides and protrudes from the lower rail 11, the bending prevention unit 30 suppresses the bending of the protruding portion 12D in the gravity direction. It becomes like this. Therefore, the slidability of the upper rail 12 can be prevented from being deteriorated.

  Further, the deflection preventing unit 30 is configured to include a roller 32 that is grounded in the direction of gravity and rolls as the upper rail 12 slides. With this configuration, even when the anti-deflection unit 30 is grounded in the direction of gravity, the roller 32 rolls along with the sliding of the upper rail 12 so that the slidability of the upper rail 12 is not deteriorated. Can be.

  In addition, the lower rail 11 is formed with a recess 11A1 that can receive the deflection preventing unit 30 in the sliding direction. Thus, the upper rail 12 can be slid widely in the said receiving direction because the bending prevention unit 30 is received in the recessed direction 11A1 of the lower rail 11 in a sliding direction.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the seat to which the “slide rail” of the present invention is applied is not only a seat mounted for a railway vehicle, but also a seat mounted on a vehicle other than a railroad such as an automobile, and various vehicles such as an aircraft and a ship. It may be a sheet provided for.

  The configuration of the present invention may be a configuration in which the “feed screw shaft” is attached to the “lower rail” and the “nut” is attached to the “upper rail”. The configuration of the present invention may be a configuration in which the “nut” is driven to rotate and the “feed screw shaft” is fixed. Further, the “slide rail” of the present invention is not limited to the electrically operated slide structure as shown in the above-described embodiment, but can be manually operated as in the configuration disclosed in documents such as Japanese Patent Application Laid-Open No. 2008-254599. The slide rail may be unlocked or may be slid. That is, the “slide stopper unit” may be configured to be unlocked manually.

  Further, the “slide rail” of the present invention may be assembled so that the lower rail is prevented from being peeled sideways with respect to the lower rail, for example, by providing the lower rail on the side wall portion of the vehicle. Even in such a case, it is possible to prevent the upper rail from being bent in the gravitational direction by providing a protruding portion on the protruding portion of the upper rail so as to protrude in the gravitational direction. In addition, the “slide rail” of the present invention may be configured to connect the vehicle seat so as to be slidable in a direction other than the front-rear direction such as the width direction with respect to the floor.

  In addition, the “protruding portion” of the present invention is such that the protruding portion of the upper rail is bent by receiving a load from the seat so that the protruding portion is grounded on the floor to prevent the protruding portion from being bent. It may be provided as a state. Further, the “protruding portion” does not necessarily have a configuration in which a roller is provided on a portion that is grounded on the floor, and a tip side portion that is grounded on the floor is unlikely to deteriorate the slidability of the upper rail. A rounded shape or the like may be used. In addition, a member that can reduce sliding friction with respect to the floor surface, such as a resin shoe, may be attached to the surface of the projecting portion that is grounded on the floor surface. In addition to the base bracket made of steel plate installed on the floor as shown in the above embodiment, the grounding point of the “projection” is a grounding surface on another floor such as a carpet floor surface. May be.

  In addition, the “protruding portion” of the present invention may be provided at the protruding portion on the rear side of the upper rail when the upper rail can slide in the region protruding rearward with respect to the lower rail. .

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat back 3 Seat cushion 10 Slide rail 11 Lower rail 11A Bottom surface part 11A1 Recessed part 11A2 Through hole 11B Lower side fin part 11F Clearance 12 Upper rail 12A Vertical surface part 12B Top plate part 12C Upper side fin part 12D Overhang part 13 Resin shoe 13 Steel ball 13B Roller 20 Feed screw unit (slide stopper unit)
21 Feed screw shaft 21A Bearing 22 Gear unit 22A Gear box 22B L bracket 22B1 Bolt 23 Nut body 23A Base 23B Square nut 23C Holder 23C1 Opening 23C2 Claw 23D Bolt 30 Deflection unit (protrusion)
31 Support tool 32 Roller 32A Support shaft 40 Base bracket 41 Leg M Electric motor Mr Connecting rod F Floor

Claims (4)

A slide rail for connecting a vehicle seat in a slidable state with respect to a floor;
A lower rail mounted on the floor;
An upper rail assembled to the lower rail and slidably attached to the vehicle seat;
A slide stop unit assembled between the rails to stop these slides,
The upper rail is designed to be able to slide in an area protruding in the sliding direction with respect to the lower rail,
A protruding portion that protrudes in the direction of gravity and suppresses bending in the gravity direction of the protruding portion is provided on the protruding portion that protrudes in the sliding direction from the lower rail of the upper rail ,
The upper rail has a shape having a pair of vertical surface portions facing each other in a direction intersecting the sliding direction and a top plate portion connecting between the upper end portions of the pair of vertical surface portions,
The protruding portion is provided in a region immediately below the top plate portion of the upper rail, and a sliding friction reducing member capable of reducing sliding friction with respect to the ground contact is provided at a portion of the protruding portion that is grounded in the gravity direction. A slide rail characterized by The slide rail according to claim 1,
The sliding friction reducing member, a slide rail, wherein the roller der Rukoto that rolls along with the slide of the previous SL upper rail. The slide rail according to claim 1 or 2,
A slide rail, wherein the lower rail is formed with a recess capable of receiving the protrusion in the sliding direction. The slide rail according to claim 2,
  The projecting portion has a pair of leg portions facing in a direction intersecting the sliding direction, the roller is provided at a position sandwiched between the pair of leg portions, and the pair of leg portions, A slide rail arranged to fit between the pair of vertical surface portions constituting the upper rail.

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