JP2010220935A - Footrest device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To store a footrest, whose effective length is long, at the lower part of a seat in a simple structure. <P>SOLUTION: The back end 11 of a main footrest 1 is fixed on a rotary shaft 6 at the lower part of a seat 5 and is made rotatable, a sub footrest 2 is provided movable back to be biased toward the back end 11. The seat 5 is provided with a belt locking part 7, a first guide shaft 8 is mounted on the front end 12 of the main footrest 1, and the belt locking part 7 and the sub footrest 2 are connected with a belt 10 via the front of the first guide shaft 8. The distance between the belt locking part 7 and the first guide shaft 8 connected with the belt 10 is longer than the case where the main footrest 1 rotates forward of the seat 5 to position at the lower part of the seat 5, so when the main footrest 1 rotates forward, the sub footrest 2 is pulled by the belt 10 via the first guide shaft 8, moves forward to project, and is fixed to be used. When the main footrest 1 rotates backward, the sub footrest 2 moves backward to be stored by the bias power. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a footrest device that allows a person sitting on a seat to place his / her foot in a state where his / her foot is stretched forward.

  As a conventional footrest device, for example, a footrest is rotatably provided on a rotation shaft arranged in an axial direction in a seat width direction provided at a portion which hits below a knee at a front end of a seat portion on which a waist is placed and rotated. In general, the shaft is rotated by a motor or manually so that the footrest is moved up and down around the rotation shaft. When using this footrest device, rotate the footrest to the front and extend it horizontally to the front of the seat to fix it in use, and when not in use, rotate the footrest to the rear Then, it is pushed into the space under the seat while being suspended from the rotating shaft, and is fixed in the stored state (for example, see Patent Document 1).

  However, since the space under the seat between the floor and the seat is limited in height, a footrest with a long effective length for placing the entire foot from the knee to the tip of the foot is the floor surface, the seat. Since it becomes longer than the inter-part height, it cannot be stored in the space under the seat as it is.

  Therefore, the secondary footrest is slidably supported by the main footrest (footrest) so that the footrest can be extended, and when the device is stored under the seat, the subfootrest is retracted relative to the main footrest. Thus, a technology is disclosed in which a predetermined effective length can be secured by using a compact body and advancing in use.

  For example, in the footrest device described in Patent Document 2, the main footrest is supported so as to be rotatable around the rotation axis from the lower portion of the seat portion to the front portion of the seat portion, and the sub-footrest is disposed forward of the main footrest. Along with the rotation, it is pushed out via a link lever connected between the auxiliary footrest and the rotating shaft, and moves forward with respect to the main footrest. By this advancement, the auxiliary footrest can extend further forward than the front end portion of the main footrest, so that a long effective length can be ensured when used. Further, when storing, the overhanging sub-footrest is pulled back via the link lever, and is stacked on the main footrest so that it can be stored under the seat. (For example, refer to Patent Document 2).

JP 2002-65393 A Japanese Patent Laid-Open No. 2004-16608 (page 7, FIG. 4)

  However, since the footrest device has a large number of link levers, it has many movable parts and a complicated structure. If there are many movable parts and the structure is complicated, the apparatus is not preferable because it is complicated to maintain and expensive in terms of cost. In general, since the link lever has a narrow movable range, it is not preferable to increase the stroke to increase the effective length of the footrest device because the link lever is further complicated and enlarged.

  Accordingly, an object of the present invention is to enable a footrest device having a long effective length to be stored in a space below the seat with a simple structure.

In order to solve the above-described problems, the present invention provides a bendable belt in which a sub-footrest is provided so as to be able to advance and retreat with respect to a main footrest rotating around a rotation axis, and the sub-footrest is pulled forward with respect to the main footrest. The belt is connected to the seat via the front end of the main footrest, and the distance between the belt locking portion to the seat and the front end of the main footrest changes as the main footrest rotates. It is.
If it does in this way, if the distance of the latching | locking part and the main footrest front end part becomes long, a subfootrest will slide so that it may protrude ahead by pulling of a belt. Further, if the distance is shortened, the belt is not pulled forward, so that if the urging force is separately applied to the sub-footrest, the sub-footrest can be slid back so that the main footrest rotates. For this reason, the sub-footrest can be moved forward and backward in conjunction with the forward rotation of the main footrest, and the movable part of the footrest device can be configured with a bendable belt without interposing a link lever. Simple.

  Specifically, the rear end portion of the main footrest is fixed to a rotation shaft provided below the seat portion of the seat so that the main footrest can be rotated in the front-rear direction. The main footrest includes a rear end portion and a front end portion. And a biasing means for biasing the secondary footrest toward the rear end of the main footrest. A belt locking portion is provided on the seat portion, a first guide shaft is attached to a front end portion of the main footrest, and the belt locking portion and the auxiliary footrest are connected by a belt passing through the front of the first guide shaft. At this time, the distance that the belt connects the belt locking portion and the first guide shaft is longer when the main footrest is rotated forward than the seat portion is positioned below the seat portion. It has become.

  The main footrest rotates forward around the rotation axis, and the sub footrest is pulled by the belt via the first guide shaft and protrudes forward with respect to the main footrest, and the main footrest and the subfootrest are respectively In this state, the main footrest 1 is rotated rearward, and the sub-footrest is urged by the urging means so as to retreat with respect to the main footrest.

  For this reason, by attaching the belt and the urging means, the auxiliary footrest can be moved back and forth in conjunction with the rotation of the main footrest, so the structure of the footrest device is simple, and the attachment of each part of the movable part It is easy to clean and replace.

  Further, a second guide shaft is provided in parallel below the first guide shaft, a third guide shaft in the seat width direction is provided above the belt locking portion below the seat portion, and the belt includes the belt locking A configuration may be adopted in which the first guide shaft is reached from the front of the second guide shaft and the rear of the third guide shaft. In this way, since the belt stroke can be lengthened by increasing the guide shaft, the difference in distance between the belt locking portion and the first guide shaft accompanying the rotation of the main footrest can be increased. Without increasing the size and complexity of the device, the stroke of the auxiliary footrest can be increased.

  Since the present invention is configured as described above, the footrest device having a long effective length can be stored in the space below the seat with a simple structure.

Perspective view of one embodiment Front view of the same embodiment Side view of the same embodiment Side view of the same embodiment Detailed view of footrest rail

  One embodiment is shown in FIGS. In the footrest device of this embodiment, as shown in FIGS. 2 and 3, the axial direction is arranged in the width direction of the seat 20 on the frame 19 in the seat 5 at the portion of the seat 20 that hits the knee at the front end of the seat 5. A rotating shaft 6 is rotatably provided. A gear 15 shown in FIG. 1 is attached to the end of the rotary shaft 6 and meshes with a gear 16 directly connected to the motor 17.

  The main footrest 1 is attached to the rotating shaft 6. As shown in FIG. 1, the main footrest 1 has a U-shaped cross section composed of an upper surface 1a and left and right side surfaces 1c and 1c. A cushioning material is disposed on the upper surface 1a and left and right side surfaces. 1 c and 1 c extend from the rear end portion 11 attached to the rotary shaft 6 to the front end portion 12. Further, mounting holes are provided in the rear end portions 11 of the left and right side surfaces 1c, 1c, and the main footrest 1 is connected to both ends of the rotating shaft 6 by welding or the like through the mounting holes. The member 14 and the bolt 14a are connected to each other so as to be rotatable integrally with the rotating shaft 6.

  As shown in FIG. 2, the total length of the main footrest 1 is such a length that the front end 12 does not hit the floor surface when the main footrest 1 is rotated downward around the axis of the rotary shaft 6. It has become.

  Moreover, the sub footrest 2 is provided in the main footrest 1 so that advancement / retraction is possible in the direction connecting the rear end portion 11 and the front end portion 12. As shown in the figure, the sub-footrest 2 has a quadrangular box shape, and like the main footrest 1, a cushion material is arranged on the upper surface so that a foot can be placed thereon. Yes. Outer rails 3 and 3 shown in FIG. 5A are provided on the inner side of the left and right side surfaces 1c and 1c of the main footrest 1 from the rear end portion 11 to the front end portion 12, respectively. 2, the inner rails 4 and 4 which are fitted to the outer rails 3 and 3 are attached to the left and right side surfaces 2c and 2c via the middle rails 4 'and 4' shown in FIG.

  Since the inner and outer rails 3 and 4 mesh with each other via the middle rail 4 'and slide with each other, the auxiliary footrest 2 follows the footrest rail as shown in FIG. 5 (b). You can advance and retreat.

  As shown by the solid line in FIG. 4, the sub footrest 2 is substantially stored in the space between the left and right side surfaces 1c and 1c in a state of being retracted toward the rear end portion 11 with respect to the main footrest 1 (stored state). The total length is such that the front end portion 22 of the auxiliary footrest 2 does not hit the floor surface even when the main footrest 1 rotates around the axis of the rotating shaft 6 in the retracted state. It has become the length. Further, as shown by a solid line in FIG. 3, the main footrest can be placed so that a leg or a calf portion of a seated person can be placed in front of the seat portion 5 in a state of being advanced toward the front end portion 12 (use state). 1 The length is such that the front end 12 can protrude further forward. The setting range in which the footrest rail can slide is set so as to satisfy the above conditions. Further, the footrest rail has a stopper function that prevents the auxiliary footrest 2 from jumping outside beyond the range in which the subfootrest 2 can slide relative to the main footrest 1 on the front end portion 12 side and the rear end portion 11 side. (Not shown) is provided.

  A belt 10 connects the sub-footrest 2 and the seat 5 of the seat 20. For the connection, a belt locking portion 7 is provided on a support member 18 integral with the frame 19 in the seat portion 5 behind and below the rotating shaft 6, and a belt 10 having a predetermined width is provided on the locking portion 7. Lock one end. The belt 10 may be any one that can be bent, and it is desirable that the belt 10 does not expand and contract except for an adjusting portion 10a described later.

  As shown in FIG. 1, the first guide shaft 8 is attached to the center of the front end portion 12 of the main footrest 1 so that the axial direction thereof is in the seat width direction. Two induction shafts 8 'are provided in parallel in the same direction. The first guide shaft 8 and the second guide shaft 8 ′ are provided so as to protrude downward from the lower surface of the main footrest 1. A third guide shaft 9 is also provided below the seat portion 5 at a portion of the support member 18 located above the belt locking portion 7 so that its axial direction is in the seat width direction. As shown in FIG. 3, the belt 10 passes from the belt engaging portion 7 through the second guide shaft 8 'in the order from the lower side to the front and the upper side, and then turns around the outer periphery of the second guide shaft 8'. The lower part of the three guide shaft 9 is passed from the lower side to the rear and the upper side in turn, and the outer periphery of the third guide shaft 9 is wound and folded to reach the first guide shaft 8. Further, the outer periphery of the first guide shaft 8 is wound from the lower side of the first guide shaft 8 to the upper side, and the direction thereof is changed. The belt locking portion 7 and the sub footrest 2 are connected by a single belt 10.

  At this time, a cylindrical sliding ring (not shown) is fitted to the first guiding shaft 8, the second guiding shaft 8 ', and the third guiding shaft 9 so that the sliding rings can rotate. Since the belt 10 is wound around the outer periphery of each guide shaft 8, 8 ', 9 via this sliding ring, it is easy to slide around each shaft.

  Further, the distance between the belt locking portion 7 and the first guide shaft 8 by the belt 10, that is, from the belt locking portion 7 through the second guide shaft 8 ′ and the third guide shaft 9 in order. As shown by a solid line in FIG. 3, the distance to the first guide shaft 8 is greater than the case where the main footrest 1 is positioned below the seat part 5 indicated by the solid line in FIG. 4 when the main footrest 1 is rotated forward. The distance is longer. That is, the distance corresponding to “L1 + L2 + L3” from the belt locking portion 7 shown in FIG. 3 to the first guide shaft 8 via the second guide shaft 8 ′ and the third guide shaft 9 in this order is shown in FIG. The distance is longer than the distance corresponding to “L1 ′ + L2 ′ + L3 ′”.

  Further, the engaging portion 23 provided at the upper portion of the rear end portion 21 of the sub footrest 2 and the engaging portion 24 provided at the rear end portion 11 of the main footrest 1 are biasing means 13 made of an elastic body such as rubber. It is connected.

  The operation when using this device will be described. As shown in FIG. 4, the motor 17 shown in FIG. 1 is operated in a state where the main footrest 1 and the subfootrest 2 are stacked and stored below the seat portion 5. The rotating shaft 6 is rotated. As the rotary shaft 6 rotates, the main footrest 1 and the sub-footrest 2 rotate as indicated by an arrow A from the position below the seat portion 5 indicated by a chain line in FIG. 3 to the front of the seat portion 5 indicated by a solid line in FIG. Along with this rotation, as described above, the distance from the belt locking portion 7 to the first guide shaft 8 through the second guide shaft 8 ′ and the third guide shaft 9 in this order becomes longer. 3 is pulled in the direction of arrow B in FIG. 3 so as to reduce the distance from the first guide shaft 8 to the locking portion 23. By this pulling, as shown by the solid line in FIG. 3, the auxiliary footrest 2 moves forward with respect to the main footrest 1 and protrudes forward of the seat portion 5.

  If the motor 17 is stopped in this state, since the gears 15 and 16 are engaged with each other, the main footrest 1 and the subfootrest 2 are fixed so as not to move around the axis. 10 is pulled forward by 10 and fixed to the main footrest 1 so as not to move in the front-rear direction. In this way, the cushion material portion of each of the footrest upper surfaces 1a and 2a, which is a portion on which the foot of the footrest device is placed, projects in the horizontal direction forward of the seat portion 5 and can be used.

  Since the footrest rail uses a so-called double slide rail in which an intermediate rail 4 'is interposed between the outer rail 3 and the inner rail 4, as shown in FIG. When 2 moves forward with respect to the main footrest 1 and protrudes, the amount of protrusion can be increased without securing a portion that maintains the overlap between the outer rail 3 and the inner rail 4 so long. Further, when the sub-footrest 2 moves backward with respect to the main footrest 1, the inner rail 4 and the middle rail 4 ′ attached to the sub-footrest 2 protrude further rearward than the rotating shaft 6 and interfere with the seat portion 5 and the like. There is nothing to do.

  Next, the operation when the device is stored will be described. In the state in which the main footrest 1 and the auxiliary footrest 2 are in front of the seat portion 5 as indicated by solid lines in FIG. 3 (indicated by chain lines in FIG. 4), 17 is operated to rotate the rotating shaft 6. As the rotary shaft 6 rotates, the main footrest 1 and the sub-footrest 2 rotate downward as shown by the arrow C in FIG. Along with this rotation, since the distance from the belt locking portion 7 to the first guide shaft 8 via the second guide shaft 8 ′ and the third guide shaft 9 in this order is shortened, the belt 10 acting on the sub footrest 2 is shortened. The tension due to ceases to work. Then, due to the action of the urging means 13, the sub footrest 2 is urged in the direction of the rear end portion 11 of the main footrest 1 as indicated by an arrow D, retreats with respect to the main footrest 1, and the main footrest 1 and The sub footrest 2 is stacked and stored below the seat portion 5.

  If the motor 17 is stopped in this state, the gears 15 and 16 are engaged with each other, so that the main footrest 1 and the subfootrest 2 are fixed so as not to move in the direction around the axis, and the subfootrest 2 is attached. It is pulled backward by the biasing means 13 and fixed to the main footrest 1 so as not to move in the front-rear direction.

  In this stored state, the belt 10 is provided with an adjusting portion 10a with rubber interposed as shown in FIG. This is because the distance “L1 ′ + L2 ′ + L3 ′ + L4 ′” from the belt locking portion 7 to the locking portion 23 shown in FIG. 4 is completely the same as the total length “L1 + L2 + L3 + L4” of the belt 10 shown in FIG. Instead, when the latter distance is slightly shorter, the slack 10b of the belt 10 in the stored state shown in FIG. 4 is pulled by the rubber interposed in the adjusting portion 10a so that the belt 10 does not slack. It is what.

In this embodiment, the belt locking portion 7 and the third guide shaft 9 are disposed behind and below the rotary shaft 6. However, the present invention is not limited to this embodiment, and the belt locking portion 7 and the third guide shaft 9 are not limited thereto. The position of the belt 10 passes through the second guide shaft 8 ′ and the third guide shaft 9 in order from the distance between the belt lock portion 7 and the first guide shaft 8. Thus, the distance to the first guide shaft 8 is free as long as the distance is longer when the main footrest 1 is rotated forward than the seat portion 5 than when the main footrest 1 is positioned below the seat portion 5. Specifically, it is desirable to arrange it behind and below the rotary shaft 6, but even if it is behind and above the rotary shaft 6, it can be used as long as the above distance condition is satisfied.
Note that, depending on the distance condition, that is, the stroke difference of the distance along the belt 10 caused by the rotation of the main footrest 1 (the distance connecting the belt engaging portion 7 and the first guide shaft 8), When a predetermined stroke can be ensured, the belt 10 is arranged so as to go directly from the belt locking portion 7 to the first guide shaft 8 by omitting the second guide shaft 8 'and the third guide shaft 9. Also good. Conversely, the number of the guide shafts is increased to increase the number of times the belt 10 reciprocates between the seat portion 5 side and the front end portion 12 side, and the distance difference along the belt 10 is increased. It may be.

  In this embodiment, an elastic body such as rubber is used as the biasing means 13, but a spring, a magnet, or other biasing means may be used. For example, the auxiliary footrest 2 may be urged toward the rear end portion 11 as required by the urging means 13 including a driving device that operates as appropriate. As a means for rotating the rotating shaft 6, the motor 17 may be used as in this embodiment, or it may be manually rotated using a link lever or the like. However, in either the motor or manual mode, it is necessary to appropriately provide a lock mechanism or a stopper mechanism for stopping the rotation of the rotary shaft 6 so that the main footrest 1 can be fixed at a predetermined rotation angle. is there.

  Further, the slide rail used for the footrest rail is not limited to the double slide rail of this embodiment, and may be a single slide rail composed of the outer rail 3 and the inner rail 4, and other well-known slide rails may also be used. Can be adopted.

  In addition, the shape, the size, the range of the portion on which the foot of the main and sub footrests 1, 2 related to the footrest device is placed can be freely set.

DESCRIPTION OF SYMBOLS 1 Main footrest 1c, 2c Side surface 2 Sub footrest 3 Outer rail 4 Inner rail 5 Seat part 6 Rotating shaft 7 Belt latching part 8 First guide shaft 8 'Second guide shaft 9 Third guide shaft 10 Belts 11, 21 Rear end Portions 12 and 22 Front end portion 13 Energizing means 14 Connection members 15 and 16 Gear 17 Motor 18 Support member 19 Frame 20 Sheet

Claims (2)

A rear end portion 11 of the main footrest 1 is fixed to a rotating shaft 6 provided below the seat portion 5 of the seat so that the main footrest 1 can be rotated in the front-rear direction. The main footrest 1 includes a rear end portion 11 and a front end portion. The auxiliary footrest 2 is provided so as to be able to advance and retreat in a direction connecting to 12, and an urging means 13 for urging the auxiliary footrest 2 toward the rear end portion 11 side of the main footrest 1 is provided.
A belt locking portion 7 is provided on the seat portion 5, a first guide shaft 8 is attached to the front end portion 12 of the main footrest 1, and the belt locking portion 7 and the sub footrest 2 are connected to the front of the first guide shaft 8. The distance between the belt 10 that connects the belt locking portion 7 and the first guide shaft 8 is that when the main footrest 1 is rotated forward of the seat portion 5. The distance is longer than the case where the seat 5 is located below,
The main footrest 1 pivots forward around the rotation shaft 6, and the sub-footrest 2 is pulled by the belt 10 via the first guide shaft 8 and moves forward and protrudes from the main footrest 1. The main footrest 1 and the subfootrest 2 are fixed, the main footrest 1 is rotated rearward, and the subfootrest 2 is urged by the urging means 13 to move backward with respect to the main footrest 1. And footrest device. A second guide shaft 8 ′ is provided in parallel below the first guide shaft 8, a third guide shaft 9 in the seat width direction is provided above the belt locking portion 7 below the seat portion 5, and the belt 10 is 2. The footrest device according to claim 1, wherein the footrest device reaches the first guide shaft 8 from the belt locking portion 7 through the front of the second guide shaft 8 ′ and the rear of the third guide shaft 9.

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