JP2015227131A - Seating-detection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seating-detection apparatus capable of accurately detecting a seating state while preventing a seat structure from being complicated and a vehicle body from increasing in size.SOLUTION: A seating-detection apparatus includes a load detection part S for detecting a load exerted on a seat 20 of a saddle-riding vehicle, the seat supported by a set of left-right seat rails 23L, 23R. Further, the seat 20 includes a cushion member 33 for supporting the load, and a bottom plate member 27 for supporting the cushion member 33. On a bottom surface of the bottom plate member 27, a cushion rubber 34 is provided oppositely to an upper end surface 28L of a seat rail 23L of one of the aforementioned pair. A load detection unit S is disposed at a position separated downward from the upper end surface 28L. Also provided is a load transmission member 50 interposed between cushion rubber 34 and the upper end surface 28L for transmitting the load exerted on the seat 20 to the load detection unit S.

Description

  The present invention relates to a seating detection device, and more particularly to a seating detection device that detects whether an occupant is seated on a seat of a motorcycle.

  2. Description of the Related Art Conventionally, a seating detection device that detects whether or not an occupant is seated on a seat has been known for use in control of an idle stop of a vehicle, airbag deployment, and the like.

  Patent Document 1 discloses a seating detection device provided on a seat of a saddle riding type motorcycle. In this seating detection device, an on / off switch is provided between the seat cushion portion and the seat bottom plate, and the seating state is detected when the switch is turned on by the seating load transmitted through the cushion portion. .

  Patent Document 2 discloses a seating detection device provided on a seat of a four-wheeled vehicle having a passenger compartment. In this seating detection device, a pressure-sensitive sensor consisting of a strain gauge is incorporated in the rail part that supports the entire seat so that it can slide back and forth with respect to the floor in the passenger compartment, and the seating state is detected based on the output of this pressure-sensitive sensor. Is configured to do.

JP 2012-176720 A JP 2004-114986 A

  However, in the seating detection apparatus described in Patent Document 1, the pressure-sensitive on / off switch is expensive, and the sensor structure is complicated because the sensor is disposed between the cushion and the bottom plate of the seat, which increases the number of manufacturing steps. There was a problem of increasing.

  In addition, the seating detection device described in Patent Document 2 has a structure in which a strain sensor is incorporated into a part of a seat slide mechanism, and thus is usually difficult to apply to a motorcycle seat without such a mechanism. There was a problem.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the prior art and to provide a seating detection device that can accurately detect a seating state while avoiding a complicated seat structure and an increase in the size of a vehicle body.

  In order to achieve the above object, according to the present invention, a load acting on a seat (20) of a saddle-ride type vehicle supported by a pair of left and right seat rails (23L, 23R) is detected by a load detector (S). In the seating detection device, the seat (20) includes a cushion member (33) that receives the load and a bottom plate member (27) that supports the cushion member (33), and a lower surface of the bottom plate member (27) A cushion rubber (34) is attached to the upper end surface (28L) of the seat rail (23L) on one side of the pair of left and right sides, and the load detector (S) extends from the upper end surface (28L). It is disposed at a position spaced downward, and is interposed between the cushion rubber (34) and the upper end surface (28L), and receives the load received by the seat (20) in the load detector ( ) It is first characterized in having a load transfer member (50) to be transmitted to.

  The load detection unit (S) has a second feature in that the load detection unit (S) is disposed in a recess (26L) formed on an inner surface of the seat rail (23L) on the one side.

  The load transmission member (50) includes an input portion (51) sandwiched between an upper end surface (28L) of the seat rail (23L) on one side and the cushion rubber (34), and the input portion ( 51) a plate-like member having a transmission part (52) bent from the end of the transmission part 51 and extending downward and an output part (53) bent from the end of the transmission part (52) and directed horizontally. A third feature is that the load detection unit (S) is an assembly including a strain sensor (63) pressed from above by the output unit (53).

  The seat (20) is provided with a first seating surface (21) on which a driver is seated and a second seating surface (22) on which a passenger sits behind the first seating surface (21). The load detector (S) is disposed below the first seating surface (21), and the load transmission member (50) is directed in the vertical direction to transmit the load to the load detector (S). There is a fourth feature.

  Furthermore, the load detection part (S) is fixed to the one side seat rail (23L) by brackets (66, 70) that can be attached to and detached from the one side seat rail (23L). There are 5 features.

  According to the first feature, the seat includes a cushion member that receives a load and a bottom plate member that supports the cushion member, and is opposed to the lower surface of the bottom plate member and the upper end surface of one of the left and right seat rails. A cushion rubber is attached, and the load detection unit is located at a position spaced downward from the upper end surface. The load received by the seat is interposed between the cushion rubber and the upper end surface to the load detection unit. Since the load transmitting member for transmitting is provided, the load received by the sheet can be detected by the load detecting unit disposed at a position separated on the lower side of the sheet.

  Thereby, compared with the structure which arrange | positions a load detection part between a cushion member and a baseplate member, complication of a seat structure can be avoided. Further, since it is not necessary to provide a space for disposing the load detection unit between the seat and the seat rail, the seat and the seat rail can be shared with a model having no seating detection function. In addition, since the load is transmitted to the load transmission member via the cushion rubber, rattling of the load transmission member and the like is suppressed by the elastic force of the cushion rubber, and the load detection accuracy can be improved.

  Further, since there is no need to connect the seat and the vehicle body side by wiring, there is no influence on the work of attaching and detaching the seat from the vehicle body during maintenance. Moreover, since it is arrange | positioned in the inner position spaced apart downward from the upper end surface of a seat rail, when a seat is removed, possibility that a load detection part will be influenced by a water | moisture content, dust, etc. can be reduced.

  According to the second feature, since the load detection unit is disposed in the recess formed on the inner surface of the seat rail on one side, when the seat rail is formed of an aluminum cast plate member or the like, It is possible to dispose the load detecting portion by effectively utilizing the dead space formed on the inner surface of the seat rail for rigidity balance and weight reduction. Thereby, the enlargement in the vehicle width direction can be prevented and the mass can be concentrated.

  According to the third feature, the load transmission member includes an input portion sandwiched between the upper end surface of the seat rail on one side and the cushion rubber, and a transmission portion that is bent from the end portion of the input portion and extends downward. The plate-like member having an output part bent from the end of the transmission part and oriented in the horizontal direction, and the load detection part is an assembly including a strain sensor pressed from above by the output part. Even when components such as batteries and fuses are densely arranged between the left and right seat rails, the load can be transmitted to the load detection unit without interfering with these components. Further, the load can be transmitted while the load transmitting member is disposed inside the seat rail so as not to be exposed to the outside.

  According to the fourth feature, the seat is provided with a first seating surface on which the driver is seated and a second seating surface on which the passenger is seated behind the first seating surface, Since the load transmitting member is arranged below the first seating surface and transmits the load to the load detecting portion in the vertical direction, the tandem has a first seating surface and a second seating surface and is long in the front and rear direction. Even with a formula seat, it is possible to detect the load mainly on the driver side, where the importance of boarding detection is high.

  According to the fifth feature, since the load detection unit is fixed to the seat rail on one side by a bracket that can be attached to and detached from the seat rail on the one side, the seat and the seat rail are used to obtain a seating detection function. There is no need for a dedicated design, and a seating detection function can be selectively attached.

1 is a left side view of a motorcycle to which a seating detection device according to an embodiment of the present invention is applied. 1 is a perspective view of a seat and a seat rail of a motorcycle. It is an enlarged plan view of a seat rail and its periphery. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is a disassembled perspective view of a load detection unit. It is sectional drawing of a load detection unit.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a left side view of a motorcycle 1 as a saddle riding type vehicle to which a seating detection device according to an embodiment of the present invention is applied. A head pipe 7 that pivotally supports a steering stem (not shown) is provided at the front end of the body frame 2 of the motorcycle 1. A pair of left and right front forks 10 that rotatably support the front wheels WF are attached to the vehicle body frame 2 by a steering stem so as to be steerable. A steering handle 4 is attached to an upper end portion of the front fork 10, and a front fender 11 that covers an upper portion of the front wheel WF is attached to an intermediate portion of the front fork 10.

  The vehicle body frame 2 has a pair of left and right main tubes extending rearward from the head pipe 7 and covering the upper portion of the engine 11. The main tubes are bent downward at the rear portion of the engine 11 and pivot shaft 13 of the swing arm 14. Support. A pair of left and right seat rails 23 are attached to the extending portion 2a provided at the bent portion of the main tube.

  The driving force of the engine 11 is transmitted to the rear wheel WR via a drive shaft (not shown) that penetrates the swing arm 14. The swing arm 14 is suspended in a swingable manner via the rear cushion 15 with respect to the extending portion 2a of the vehicle body frame 2.

  The front and side of the head pipe 7 are covered with a front cowl 8 to which a wind screen 5 and a headlamp 9 are attached. A pair of right and left rear-view mirrors 6 are attached to a position outside the windscreen 5 in the vehicle width direction.

  The front cowl 8 extends to a position covering the front part of the crankcase of the engine 11, and the lower part of the crankcase is covered with an under cowl 18. A part of the exhaust pipe 12 of the engine 11 is guided from the lower part of the under cowl 18 to the muffler 12a behind the vehicle body.

  A fuel tank 3 is attached to the upper part of the body frame 2, and a seat 20 is disposed at the rear of the fuel tank 3. The seat 20 is configured as a front-rear integrated tandem seat in which a second seating surface 22 on which a passenger sits is provided behind a first seating surface 21 on which a driver is seated. The outside of the seat rail 23 in the vehicle width direction is covered with a pair of left and right rear cowls 19, and a tail lamp device 17 and a rear fender 16 are attached to the rear end portion of the seat rail 23.

  A load detection unit S as a load detection unit that detects a load applied to the seat 20 is disposed at a position spaced downward from the seat 20. The load applied to the seat 20 is transmitted to the load detection unit S via the load transmission member 50 oriented in the vertical direction. In the present embodiment, the whole including the load detection unit S, the load transmission member 50, the seat 20, and the seat rail 23 necessary for detecting the seating state of the occupant is referred to as a seating detection device.

  FIG. 2 is a perspective view of the seat 20 and the seat rail 23 of the motorcycle 1. The sheet 20 is configured such that a cushion member 33 made of a foam material is attached to the upper surface of a bottom plate member 27 made of resin and covered with a skin. On the other hand, the seat rail 23 is composed of a left-right seat rail 23L and a right-hand seat rail 23R that are substantially symmetrical and made of aluminum casting or the like. Note that the left and right seat rails 23L and 23R (hereinafter sometimes simply referred to as the seat rail 23) may be coupled to each other on the vehicle body rear side, and may be detachable from each other.

  The left and right seat rails 23L, 23R are fixed to the extending portion 2a of the vehicle body frame 2 by fastening members (not shown) that pass through the through holes 25L, 25R and 29L, 29R. Further, the projecting portion 24 projecting upward in front of the through holes 29L and 29R is pivotally supported by the rear end of the fuel tank 3, and the through holes 24L and 24R for swinging and unfolding the fuel tank 3 during maintenance or the like. Is formed.

  The seat rail 23 is an aluminum cast plate-like member whose thickness is adjusted in consideration of rigidity balance and weight reduction. The seat 20 is attached from above so as to cover the upper portion of the seat rail 23, and the lower surface of the bottom plate member 27 is supported on the vehicle body side by contacting the upper end surfaces 28L, 28R of the seat rail 23 via a plurality of cushion rubbers. The

  On the inner side surface of the seat rail 23, concave portions 26L and 26R having a reduced thickness than other portions are formed. The load detection unit S that detects the load received by the seat 20 is disposed at a position that fits in a recess 26L formed on the left seat rail 23L as one of the left and right sides.

  FIG. 3 is an enlarged plan view of the seat rail 23 and its periphery. 4 is a sectional view taken along line IV-IV in FIG. A battery 32 and a fuse box 31 are disposed at a position closer to the front of the vehicle body between the left and right seat rails 23L, 23R. A swing shaft 30 provided at the rear end portion of the fuel tank 3 is located between the extending portions 24 provided with the through holes 24L and 24R.

  The upper end surfaces 28L, 28R of the seat rail 23 are flat surfaces having a narrow width in the vehicle width direction, and extend from the position outside the vehicle width direction of the battery 32 to the vehicle body rear side to support the seat 20. The load detection unit S is positioned vertically below the upper end surface 28L by being housed in the recess 26L of the left seat rail 23L. On the upper end surface 28L above the load detection unit S, the input portion 51 of the load transmission member 50 is located.

  Here, the structure of the load detection unit S will be described with reference to FIGS. FIG. 7 is an exploded perspective view of the load detection unit S when viewed from an oblique front of the vehicle body, and FIG. 8 is a cross-sectional view of the load detection unit S when viewed from the inside of the vehicle body.

  The load detection unit S uses a strain gauge 63 that detects by converting the deflection of the base plate 62 into a resistance change of the detection element as a detection unit. The base plate 62 is held with both ends in the longitudinal direction held between a pair of support plates 60 and 61, and a load input shaft 55 is attached to the center. A spacer 59 made of an elastic member such as a rubber material is attached to the load input shaft 55, and a plate-like output portion 53 that contacts the spacer 59 is held by a nut 54. Support plates 60 and 61 at both ends of the base plate 62 are fastened and fixed to a pair of bolt shafts 56 protruding from the upper surface of the sensor bracket 57 by nuts 58.

  The load transmission member 50 includes a plate-shaped input portion 51 that is oriented in the horizontal direction, a transmission portion 52 that is bent from the end portion of the input portion 51 and extends downward, and is bent from the end portion of the transmission portion 52 to be horizontal. This is a plate-like member having an output portion 53 oriented in the direction. In other words, the load transmission member 50 is positioned above the upper end surface 28L of the left seat rail 23L and receives the seat load, and the output unit 53 presses the base plate 62 of the strain sensor 63 via the spacer 59. And the transmission part 52 which connects the input part 51 and the output part 53 is comprised. A connector 64 that outputs a sensor signal is provided at the end of the support plate 60.

  Referring to FIG. 4, the load detection unit S uses an upper bracket 66 fixed to a boss above the recess 26L using a fastening member 67 and a fastening member 71 to a boss below the recess 26L. The lower bracket 70 is fixed to the upper bracket.

  The input portion 51 of the load transmitting member 50 that transmits the load to the load detection unit S is a plate-like member disposed along the upper end surface 28L of the left seat rail 23L. An arbitrary gap (for example, 1 mm) can be set as the movement allowance of the transmission member 50.

  On the other hand, cushion rubbers 34 and 35 for stably supporting the seat 20 with respect to the upper end surfaces 28L and 28R of the seat rail 23 are attached to the lower surface of the bottom plate member 27 that supports the cushion member 33 of the seat 20. Yes. When the seat 20 is fixed to the vehicle body side by an engagement device such as a seat catch, the cushion rubbers 34 and 35 are slightly deformed and are held while the pressing force is applied. The upper end surfaces 28L and 28R and the bottom plate member 27 have a function of closely contacting with each other by the elastic force.

  According to the configuration described above, the load received by the seat 20 is transmitted from the cushion rubber 34 to the load detection unit S that is positioned below the seat 20 via the load transmitting member 50. .

  As a result, complication of the structure of the seat 20 can be avoided as compared with a configuration in which a load detection unit is built between the cushion member 33 and the bottom plate member 27 or the like. Further, since it is not necessary to provide a special space for disposing the load detection unit S between the seat 20 and the seat rail 23, the seat 20 and the seat rail 23 are shared with a model having no seating detection function. can do.

  Furthermore, since there is no need to connect the seat 20 and the vehicle body side by wiring, the operation of attaching and detaching the seat 20 for maintenance or the like is not affected. Further, since the load detection unit S is disposed at an inner position spaced downward from the upper end surface 28L of the seat rail 23, the load detection unit S is affected by moisture, dust, or the like when the seat 20 is removed. The possibility is reduced.

  Further, the load detection unit S is disposed so as to be accommodated in a recess 26L formed by removing the left seat rail 23L. Accordingly, the dead space can be effectively utilized to avoid the enlargement in the vehicle width direction, and the load detection unit S can be disposed vertically below the cushion rubber 34 to accurately detect the load received by the seat 20. It becomes possible.

  Further, since the load transmitting member 50 is a plate-like member, even when the battery 32 and the fuse box 31 are densely arranged between the left and right seat rails 23L, 23R, they do not interfere with these. A load can be transmitted to the load detection unit S.

  The cushion rubbers 34 and 35 according to the present embodiment are configured to have an engagement protrusion for engaging with the bottom plate member 27 on the upper part of the rectangular parallelepiped main body and have a hollowed recess on the lower surface thereof. The shape can be arbitrarily changed. The cushion rubber is not limited to the position below the first seating surface 21, that is, the position above the load detection unit S, but can be provided on the second seating surface 22 side, and the shape and total number can be arbitrarily set according to the vehicle type and the like. Can be changed.

  5 is a cross-sectional view taken along line VV in FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. The load detection unit S is disposed below the first seating surface 21 of the seat 20, and the load transmission member 50 transmits a load to the load detection unit S in the vertical direction. As a result, even if the seat 20 has the first seating surface 21 and the second seating surface 22 and is a tandem seat that is long in the front-and-rear direction, load detection mainly on the driver side where the importance of boarding detection is high. Is possible.

  Further, as described above, the load detection unit S is supported by the surface bent in the horizontal direction at the lower end of the upper bracket 66 and the surface bent in the horizontal direction at the upper end of the lower bracket 71. Between the two support surfaces, the upper bracket 66 and the lower bracket 71 may be configured as an integral part in addition to being fixed to each other by a fastening member, welding, or the like. The load detection unit S is fixed to the upper and lower brackets with a fastening member or the like.

  According to this configuration, the seat 20 and the seat rail 23 can be seated without changing the shapes of the cushion rubber 34, the upper and lower brackets 66 and 70, the load detection unit S, and the load transmission member 50. It is possible to separately create a model having a detection function and an unnecessary model, thereby improving production efficiency.

  The form of the motorcycle, the shape and structure of the seat and the seat rail, the structure of the load detection unit, the shape of the load transmission member and the cushion rubber, etc. are not limited to the above embodiment, and various changes can be made. For example, in the above-described embodiment, the load detection unit is attached to the left seat rail. However, by attaching this to the right seat rail, or attaching it to the left and right sides or front and rear, various load changes on the seat may be detected. it can. The seating detection device according to the present invention can be applied to various vehicles such as a straddle-type three-wheel / four-wheel vehicle in addition to a motorcycle.

  DESCRIPTION OF SYMBOLS 1 ... Motorcycle, 20 ... Seat, 21 ... 1st seating surface, 22 ... 2nd seating surface, 23 (23L, 23R) ... Seat rail, 26 (26L, 26R) ... Recessed part, 27 ... Bottom plate member, 28 (28L) 28R) ... Upper end surface, 33 ... Cushion member, 34 ... Cushion rubber, 50 ... Load transmission member, 51 ... Input portion, 52 ... Transmission portion, 53 ... Output portion, 63 ... Strain sensor (load sensor), 66 ... Upper side Bracket, 70 ... lower bracket, S ... load detection unit (load detection unit)

Claims (5)

In a seating detection device for detecting a load acting on a seat (20) of a saddle riding type vehicle supported by a pair of left and right seat rails (23L, 23R) by a load detection unit (S),
The seat (20) includes a cushion member (33) that receives the load and a bottom plate member (27) that supports the cushion member (33),
A cushion rubber (34) facing the upper end surface (28L) of one of the left and right pair of seat rails (23L) is attached to the lower surface of the bottom plate member (27),
The load detection unit (S) is disposed at a position spaced downward from the upper end surface (28L),
A load transmission member (50) interposed between the cushion rubber (34) and the upper end surface (28L) for transmitting the load received by the seat (20) to the load detection section (S); A seating detection device.   The seating detection device according to claim 1, wherein the load detection unit (S) is disposed in a recess (26L) formed on an inner surface of the seat rail (23L) on the one side. The load transmission member (50) includes an input portion (51) sandwiched between an upper end surface (28L) of the seat rail (23L) on one side and the cushion rubber (34), and the input portion (51). A plate-like member having a transmission portion (52) that is bent from the end portion of the transmission portion and extends downward, and an output portion (53) that is bent from the end portion of the transmission portion (52) and is directed horizontally.
The seating detection device according to claim 1 or 2, wherein the load detection unit (S) is an assembly including a strain sensor (63) pressed from above by the output unit (53). The seat (20) is provided with a first seating surface (21) on which a driver is seated and a second seating surface (22) on which a passenger sits behind the first seating surface (21),
The load detector (S) is disposed below the first seating surface (21),
The seating detection device according to any one of claims 1 to 3, wherein the load transmission member (50) transmits a load to the load detection unit (S) in a vertical direction.   The load detector (S) is fixed to the seat rail (23L) on one side by brackets (66, 70) that can be attached to and detached from the seat rail (23L) on the one side. The seating detection apparatus according to any one of claims 1 to 4.