JP5210772B2 - Footrest device for vehicle seat - Google Patents

Description

  The present invention generally relates to a footrest device for a vehicle seat mounted on a railway vehicle, an automobile, an aircraft, or the like, and is specifically attached to a lower portion on the back side of the vehicle seat and disposed behind the seat. The present invention relates to a footrest device that allows a occupant of another seat to be placed on the foot.

Conventionally, a footrest device for this type of vehicle is well known and disclosed in, for example, Japanese Patent Laid-Open No. 8-230542 (Patent Document 1). The footrest device is provided with a pair of parallel link mechanisms extending rearward and downward on the back side of the seat frame so as to be rotatable in the vertical direction, and a footrest portion is attached between the tips of the parallel link mechanisms. It is.
JP-A-8-230542

  However, the parallel link mechanism of the conventional footrest device has a problem that the number of components is very large. For this reason, the weight of the parallel link mechanism is heavy.

  In addition, since the component parts are cast parts and the like, there is a problem in that the manufacturing cost is high in order to perform advanced parts processing.

  Accordingly, an object of the present invention is to provide a footrest device for a vehicle seat that can reduce the number of parts with a simple configuration.

  A footrest device for a vehicle seat according to the present invention includes a support shaft, a support arm, and a mounting bracket. The support arm has a footrest attached to one end, a support shaft attached to the other end, and rotates about the support shaft. The mounting bracket has one end fixed to the seat, a support shaft attached to the other end, and the other end of the support arm locked.

  The other end portion of the support arm has two arm side plate portions facing each other. Each end portion of the two arm side plate portions has an arm side bent end plate portion bent outward in the extending direction of the support shaft.

  The mounting bracket has two bracket side plates that face each other. The two bracket side plate portions are arranged so as to sandwich the two arm side plate portions from the outside.

  Each end surface of the two bracket side plate portions abuts on an end surface of each arm side bent end plate portion of each of the two arm side plate portions on the rotational direction side, and each arm side bent end of each of the two arm side plate portions. The mounting bracket locks the rotation of the support arm by contacting the inner surface of the plate portion on the support shaft side.

  One of the two bracket side plate portions has a bracket side bent end plate portion bent in the extending direction of the support shaft, and the bracket side bent end plate portion is locked when the mounting bracket locks the rotation of the support arm. Are arranged so as to be inserted between the two arm side plates.

  In the footrest device of the present invention, the other end of the support arm and the mounting bracket are formed of plate members. For this reason, the other end portion of the support arm and the mounting bracket can be manufactured by simple sheet metal processing.

  When the support arm is excessively rotated by applying an excessive load, the end surfaces of the two bracket side plate portions are rotated by the arm side bent end plate portions of the two arm side plate portions. In addition to abutting on the end surface on the direction side, it also contacts the inner side surface of the arm side bent end plate portion of each of the two arm side plate portions on the support shaft side so as to lock the rotation of the support arm. It has become. For this reason, when an excessive load is applied to the support arm due to a footrest or the like, the end edge of the end surface on the rotation direction side of the arm side bent end plate portion is deformed by coming into contact with the end surface of the bracket side plate portion. Can be prevented.

  Further, when the mounting bracket locks the rotation of the support arm, the bracket side bent end plate portion is disposed so as to be inserted between the two arm side plate portions. Thereby, it can prevent that two arm side board parts bend toward the inner surface mutually.

  In this way, even if the other end portion of the support arm and the mounting bracket are made of a plate-like member formed by simple sheet metal processing, an excessive load is applied to the support arm by footrest or the like, so that the support arm It is possible to maintain the necessary strength so that the other end of the bracket and the mounting bracket do not deform. As a result, the footrest device can be realized with a simple configuration by pressing the sheet metal, the number of parts can be reduced, and the weight of the footrest device can be reduced.

  In the footrest device for a vehicle seat according to the present invention, the support arm includes a first arm to which the footrest portion is attached and a second arm connected to the first arm and to which the support shaft is attached. Is preferred.

  By doing in this way, the material of the 1st arm part to which a load is applied by footrest etc., and the material of the 2nd arm part which acts as a base end part of rotation can be varied. Thereby, the intensity | strength of a support arm can be hold | maintained as needed.

  As described above, according to the present invention, the footrest device can be realized with a simple configuration by pressing the metal plate, the number of parts can be reduced, and the weight of the footrest device can be reduced. Therefore, a footrest device for a vehicle seat that can be mass-produced at low cost can be provided.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view showing one side of a pair of parallel link mechanisms of a footrest device during storage as one embodiment of the present invention, and FIG. 2 is a view seen from the direction II in FIG.

  FIG. 3 is a side view showing one side of a pair of parallel link mechanisms of the footrest device in use as one embodiment of the present invention, and FIG. 4 is a view seen from the IV direction of FIG.

  As shown in FIGS. 1 to 4, the footrest device 1 includes a support shaft 100, a support arm 200, and a mounting bracket 300.

  The support shaft 100 is configured by, for example, a rod-shaped portion such as a bolt.

  The support arm 200 includes a first arm 210 to which a footrest portion is attached at one end, and a second arm 220 connected to the first arm 210 and having the support shaft 100 attached to the other end. Is done. The first arm 210 and the second arm 220 are connected by inserting bolts or the like into the connection holes 231 and 232, for example. The support arm 200 rotates around the support shaft 100 in the direction indicated by the arrow P when used as shown in FIG. 1, and is indicated by the arrow Q when stored as shown in FIG. Rotate in the direction.

  A footrest portion such as a footrest plate or a footrest bar is attached by inserting a bolt or the like into the attachment hole 211 of the first arm 210, for example. The first arm 210 and the second arm 220 are made of a plate material. The second arm 220 is formed by pressing a sheet metal, has a substantially U-shaped cross section, and connects the two arm side plate portions 221 and 222 facing each other and the arm side plate portions 221 and 222. And a plate portion 229. By inserting the other end of the first arm 210 into a substantially U-shaped opening at one end of the second arm 220 and inserting bolts or the like into the connection holes 231 and 232, the first arm 210 is inserted. And the second arm 220 are connected. The first arm 210 has a plurality of through holes 212 for weight reduction.

  One end of the mounting bracket 300 is fixed to the seat, the support shaft 100 is attached to the other end, and a locking portion 320 that locks the other end of the support arm 200 is formed. At one end of the mounting bracket 300, a seat mounting portion 310 for mounting on the back side of the seat frame is formed, for example, a bolt mounting hole or the like is formed. The mounting bracket 300 is formed by pressing a sheet metal. The locking portion 320 includes plate end surfaces 323 and 324 and plate end surfaces 325 and 326.

  The other end of the support arm 200, that is, the other end of the second arm 220 has two arm side plate portions 221 and 222 that face each other. An arm side bent end plate portion 223 is formed at the end of the arm side plate portion 221 on the mounting bracket 300 side by bending outward in the direction in which the support shaft 100 extends. An arm side bent end plate portion 224 is formed at an end portion of the arm side plate portion 222 on the mounting bracket 300 side by being bent outward in a direction in which the support shaft 100 extends.

  The mounting bracket 300 has two bracket side plate portions 321 and 322 facing each other. The two bracket side plate portions 321 and 322 are arranged so as to sandwich the two arm side plate portions 221 and 222 from the outside. A bracket side bent end plate portion 327 is formed on the bracket side plate portion 322 which is one of the two bracket side plate portions 321 and 322 by being bent in the extending direction of the support shaft 100. The distal end portion of the bracket side bent end plate portion 327 is arranged so that it can enter between the two arm side plate portions 221 and 222 as the support arm 200 rotates.

  For example, a rod-like body 240 is attached to the second arm 220 so as to connect the two arm side plate portions 221 and 222 and stand upright in the extending direction of the support shaft 100. On the other hand, in one bracket side plate portion 321 of the mounting bracket 300, for example, two through holes 328 and 329 are formed at predetermined positions separated from each other. One end of the rod-like body 240 protrudes outward from the surface of one arm side plate 221 and is formed, for example, in a substantially spherical shape. At the time of storage shown in FIG. 1, the end of the rod-like body 240 formed on the substantially spherical surface is held in a state of entering the through hole 329. When the support arm 200 rotates from the state shown in FIG. 1 in the direction of arrow P, the end formed on the substantially spherical surface of the rod-like body 240 is held in the through hole 328 when used as shown in FIG. Yes. In this way, it is possible to hold the position when the support arm 200 is stored and used, that is, when the footrest portion attached to one end of the support arm 200 is stored and used.

  By configuring as described above, in the footrest device 1 according to one embodiment of the present invention, the other end of the support arm 200 and the mounting bracket 300 are formed of plate members. For this reason, the other end portion of the support arm 200 and the mounting bracket 300 can be manufactured by simple sheet metal processing.

  In the pair of parallel link mechanisms of the footrest device 1 configured as described above, in order to change from the stored state shown in FIGS. 1 and 2 to the used state shown in FIGS. 3 and 4. 1, the support arm 200 is rotated in the direction of the arrow P. On the contrary, in order to change from the state of use shown in FIGS. 3 and 4 to the state of storage shown in FIGS. 1 and 2, the support arm 200 is rotated in the direction of arrow Q in FIG. As described above, the rotational position of the support arm 200 at the time of storage and use is maintained, for example, by engagement between the rod-shaped body 240 and each of the two through holes 328 and 329.

  However, when the support arm 200 is rotated in the direction of the arrow P from the storage position shown in FIGS. 1 and 2 to the use position shown in FIGS. 3 and 4, an excessive load is applied by the human foot. May be added. In addition, in the position in use shown in FIGS. 3 and 4, an excessive load may be applied to the support arm 200 due to weight or the like via the footrest portion. In such a case, even if the excessive load is applied and the support arm 200 is excessively rotated in the direction of the arrow P shown in FIG. 1, the mounting bracket 300 rotates the support arm 200. It is required to maintain a strength required to be able to be locked, for example, a strength capable of withstanding 200 kg or more as an allowable load. In order to meet such a demand, the pair of parallel link mechanisms of the footrest device 1 according to one embodiment of the present invention is configured as follows.

  As shown in FIGS. 3 and 4, when an excessive load is applied and the support arm 200 is excessively rotated in the direction of the arrow P shown in FIG. The end surface 323 contacts the end surface 225 of the arm side bent plate 221 on the rotation direction side of the arm side bent end plate 223, and the end surface 324 of the other bracket side plate 322 is the arm side bent end plate 224 of the arm side bent end plate 224. It contacts the end surface 226 on the rotational direction side. At the same time, the end surface 325 of one bracket side plate portion 321 contacts the inner surface 227 of the arm side bent end plate portion 223 of the arm side plate portion 221 on the support shaft 100 side, and the end surface of the other bracket side plate portion 322. 326 contacts the inner side surface 228 of the arm side bent end plate portion 224 of the arm side plate portion 222 on the support shaft 100 side. The mounting bracket 300 locks the rotation of the support arm 200 by these four contact points.

  In this way, when the support arm 200 is excessively rotated in the direction of arrow P shown in FIG. 1 by applying an excessive load, the end surfaces 323 of the two bracket side plate portions 321 and 322 are respectively. And 324 not only abut against the end surfaces 225 and 226 of the arm side bent end plate portions 223 and 224 of the two arm side plate portions 221 and 222, but also the two bracket side plate portions 321 and 322. The respective end surfaces 325 and 326 also contact inner side surfaces 227 and 228 of the two arm side plate portions 221 and 222 on the support shaft 100 side of the arm side bent end plate portions 223 and 224, respectively. The rotation is locked. For this reason, when an excessive load is applied to the support arm 200 due to a footrest or the like, the leading edges of the end surfaces 225 and 226 on the rotation direction side of the arm side bent end plate portions 223 and 224 are aligned with the bracket side plate portions 321 and 322. It is possible to prevent deformation by contacting the end surfaces 323 and 324.

  Further, as shown in FIGS. 3 and 4, when the mounting bracket 300 locks the rotation of the support arm 200, the bracket side bent end plate portion 327 is located between the two arm side plate portions 221 and 222, that is, the arm. It arrange | positions so that it may insert between the side bending end-plate parts 223 and 224. FIG. By doing in this way, it can prevent that the two arm side board parts 221 and 22 mutually bend toward an inner surface. In this case, in order to more effectively prevent the two arm side plate portions 221 and 222 from bending toward the inner surface, the arm side bent end plate portions 223 and 224 are bent by an angle of approximately 90 °. The arm-side bent end plate portions 223 and 224 may be formed by further bending inwardly by about 5 °.

  Therefore, even if the other end portion of the support arm 200 and the mounting bracket 300 are made of a plate member formed by simple sheet metal processing, an excessive load is applied to the support arm 200 by footrest or the like, so that the support arm 200 is It is possible to maintain the necessary strength so that the other end of the bracket and the mounting bracket 300 are not deformed. As a result, the footrest device 1 can be realized with a simple configuration by pressing the sheet metal, the number of parts can be reduced, and the weight of the footrest device 1 can be reduced. When producing a footrest device of the same specification, for example, if the weight of the parallel link mechanism in the conventional device is about 1.6 kg, the weight of the parallel link mechanism in the device of the present invention is reduced to about 700 g. Can do.

  In the footrest device 1 of this embodiment, the support arm 200 includes a first arm 210 to which a footrest portion is attached, and a second arm 220 that is connected to the first arm 210 and to which the support shaft 100 is attached. It is composed of By doing in this way, the material of the 1st arm 210 part to which a load is applied by footrest etc. and the material of the 2nd arm 220 part which acts as a base end part of rotation can be varied. Thereby, the intensity | strength of the support arm 200 can be hold | maintained as needed.

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of claims.

It is a side view which shows one side of a pair of parallel link mechanism of the footrest apparatus at the time of accommodation as one Embodiment of this invention. It is the figure seen from the II direction of FIG. It is a side view which shows one side of a pair of parallel link mechanism of the footrest apparatus at the time of use as one embodiment of this invention. It is the figure seen from the IV direction of FIG.

Explanation of symbols

  1: foot rest device, 100: support shaft, 200: support arm, 210: first arm, 220: second arm, 221, 222: arm side plate portion, 223, 224: arm side bent end plate portion, 225 , 226, 323, 324, 325, 326: end surface, 227, 228: inner surface, 300: mounting bracket, 321 and 322: bracket side plate portion, 327: bracket side bent end plate portion.

Claims (2)

A support shaft;
A footrest is attached to one end, the support shaft is attached to the other end, and a support arm that rotates about the support shaft;
One end is fixed to the seat, the support shaft is attached to the other end, and an attachment bracket that locks the other end of the support arm,
The other end of the support arm has two arm side plates facing each other, and each end of the two arm side plates is bent outward in the direction in which the support shaft extends. Has a plate part,
The mounting bracket has two bracket side plates facing each other, and the two bracket side plates are arranged so as to sandwich the two arm side plates from the outside,
Each end surface of the two bracket side plate portions abuts on an end surface on the rotational direction side of each arm side bent end plate portion of each of the two arm side plate portions, and each arm of each of the two arm side plate portions. By contacting the inner surface of the side bent end plate portion on the support shaft side, the mounting bracket locks the rotation of the support arm,
Either one of the two bracket side plate portions has a bracket side bent end plate portion that is bent in the extending direction of the support shaft, and when the mounting bracket locks the rotation of the support arm, the bracket The footrest device for a vehicle seat, wherein the side bent end plate portion is disposed so as to be inserted between the two arm side plate portions.   The vehicle seat according to claim 1, wherein the support arm includes a first arm to which a footrest portion is attached, and a second arm connected to the first arm and to which the support shaft is attached. Footrest device.

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