JPH06344964A - Riding-saddle type seat for vehicle - Google Patents

Abstract

PURPOSE:To provide a riding-saddle type seat for a vehicle which suppresses the transmission of vibration to a driver taking a seat, improves sitting feeling, and lightens the fatigue due to the use for a long time, without setting the sitting height high, and without making the riding attitude due to the lateral swing of the driver unstable. CONSTITUTION:As for a riding-saddle type seat 1 which is constituted so that a cushion member 4 is arranged on the upper surface of a seat bottom surface 3, and the cushion member 4 is covered by a skin member 5, a core plate 6 made of viscoelastic polyurethan is arranged on the upper surface of the bottom plate 3 in the region having a prescribed value of seat sitting pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saddle-riding type seat for a vehicle, and more particularly to a vibration absorbing structure capable of improving a sitting comfort and reducing fatigue caused by long-term use.

[0002]

2. Description of the Related Art Conventionally, as a saddle-riding type seat for a vehicle, a seat bottom plate on which a cushion material is arranged and which is covered with a skin is often used. In order to improve the sitting comfort in this seat, it is common to increase the cushion thickness as a whole to enhance the vibration absorption.

[0003]

However, in the method of thickening the cushion of the entire seat, there are problems that the seating position becomes high, the vehicle balance becomes poor, and the cost increases. Therefore, as a method of improving the vibration absorbing property without making the cushion thickness too thick, it is conceivable to dispose a vibration absorbing member such as viscoelastic polyurethane between the seat bottom plate and the cushion material. However, if this type of vibration absorbing member is used for a saddle type seat, there is a concern that the seated person is likely to move laterally and the seating posture becomes unstable.

The present invention has been made in view of the above-mentioned problems of the prior art, and does not make the seating position higher and does not make the riding posture unstable due to sideways shaking of the seated person.
An object of the present invention is to provide a saddle-ride type vehicle seat that suppresses vibration transmission to a seated person, improves sitting comfort, and reduces fatigue caused by long-term use.

[0005]

In the vehicular seat, the inventor of the present application has noticed that the vibration of the vehicle body is easily transmitted to the driver through the portion of the seat where the seated person has a high pressure distribution. By arranging the vibration absorbing member only in a portion having a high distribution, it has been thought that the above-mentioned conventional problems can be solved and the problem of lateral shake can be avoided.

In view of this, the present invention provides a vehicle saddle-ride type seat in which a cushion material is arranged on the upper surface of a seat bottom plate and the cushion material is covered with a skin, and the cushion material is provided on the upper surface of the bottom plate in a region where the seat pressure is a predetermined value or more. It is characterized in that a vibration absorbing plate made of viscoelastic polyurethane is arranged.

Here, FIG. 16 is a distribution diagram of a seat pressure acting on a seat of a motorcycle as an example of a saddle type seat for a vehicle when a driver sits down. Note that, in FIG. 16, the lower part of the drawing is the front of the vehicle. As is clear from the figure, when seated on the seat, it is understood that the pressure distribution is highest near the driver's ischial tuberosity (A, A). In addition, it was also found that the distance between the left and right ischial tuberosity portions was almost constant regardless of the physique of the driver. Therefore, it can be understood that the vibration absorbing member may be arranged at the ischial tuberosity portion of a driver having an average build.

[0008]

According to the straddle-type seat for a vehicle according to the present invention, the vibration absorbing plate made of viscoelastic polyurethane is arranged on the upper surface of the bottom plate in the region where the seat pressure is high and the vibration of the vehicle body is easily transmitted to the seated person. Therefore, it is possible to suppress transmission of vehicle body vibration to the seated person without increasing the thickness of the entire seat. And in the present invention, since the vibration absorbing member is arranged only in the portion where the seat pressure is high, there is no lateral shaking of the seated person as in the case where the vibration absorbing member is arranged in the entire seat,
It is also advantageous in terms of cost.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 are views for explaining a saddle type seat for a motorcycle according to a first embodiment of the present invention,
1 is a cross-sectional side view of the above-mentioned sheet, FIG. 2 is a bottom view thereof, FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and FIG. 4 is a graph showing vibration characteristics for explaining the effect of this embodiment sheet. is there.
In addition, in FIGS. 1 and 2, the left side of the drawings is the front of the vehicle.

In FIG. 1, reference numeral 1 denotes a two-seat saddle-riding type seat for a motorcycle. The seat 1 has a cushion material 4 provided on an upper surface of a seat bottom plate 3, and a surface of the cushion material 4 is covered with a skin 5. It has a covered structure. The front half of the seat 1 is formed in a stepped shape lower than the rear half, and the front half is for a driver and the rear half is for a tandem passenger. A mounting recess 3a is formed in the front half of the bottom plate 3 below the vehicle. The mounting recess 3a has a symmetrical shape with respect to the seat center line, and has a size that covers the circumference of the seat pressure distribution chart (FIG. 16) with the highest pressure distribution as the center. It is shaped like the shape of the isobar. The length of the vehicle in the front-rear direction is set to about 1/2 of the length of the seat 1. A core plate 6 made of viscoelastic polyurethane is adhesively fixed to the mounting recess 3a. The surface of the core plate 6 is formed in a wave shape having a pitch p and a height t, and has a shape matching the shape of the mounting recess 3a. In addition,
Reference numeral 7 is a hooking piece for locking the seat 1 to the vehicle body frame, and 2 is an air vent hole for discharging the air in the seat.

Next, the function and effect of this embodiment will be described. In the saddle riding type seat 1 according to the present embodiment, the vehicle body vibration is transmitted to the driver from a portion having a high seat pressure acting on the seat 1, particularly the above-mentioned ischial tuberosity portions A and A. Since the core plate 6 having a high vibration absorbing property is arranged in the portion where the vibration is easily transmitted, the vibration is absorbed by the core plate 6 and the sitting comfort is improved.

FIG. 4 shows the results of the above-mentioned vibration absorption test. In the figure, the solid line shows the vibration absorption characteristics of the above-mentioned conventional example, and the broken line shows the vibration absorption characteristics of this embodiment. As is clear from the figure, it can be seen that there is a vibration reduction effect particularly in the vibration frequency region (a) that affects the seating comfort of the seat.

In this embodiment, since the core plate 6 has a shape in which the isobars in the pressure distribution chart are formed, the amount of the vibration absorbing member is smaller than that in the case where the vibration absorbing member is arranged on the entire sheet. The vibration can be efficiently absorbed, and the increase in weight and cost can be suppressed. Further, since the core plate 6 is provided only in the portion where the seat pressure is high, there is no lateral wobbling as in the case where the core plate 6 is provided in the entire seat. Furthermore, as described above, since the mounting recess 3a has a recessed structure on the lower side of the vehicle, it is possible to prevent the core plate 6 itself from being displaced, and from this point also, it is possible to prevent lateral shake.

Further, in the present embodiment, the length of the core plate 6 in the vehicle front-rear direction is set to be approximately 1/2 of the length of the seat 1, so that the driver may change the seating position in the vehicle front-rear direction during traveling. You can maintain comfort.

Further, since the surface shape of the core plate 6 is formed into the corrugated shape as described above, the hardness of the core plate 6 can be adjusted by changing the pitch and the height, and the seat according to the vehicle. Performance can be realized.

In the first embodiment described above, the case where the core plate has a shape that continuously covers the left and right regions of high seat pressure and has the same thickness over the entire region has been described. Various modifications can be considered for the core plate as shown in FIGS. The same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts.

5 to 7 show a saddle type seat according to a second embodiment of the present invention in which the core plate is divided into left and right parts. In this embodiment, the mounting recess 3b is divided into left and right parts. The mounting recesses 3b are arranged so as to extend in the front-rear direction around the left and right high pressure distribution portions, and the length in the vehicle front-rear direction is set to be substantially the same as that of the first embodiment. Then, each mounting recess 3
A core plate 61 made of viscoelastic polyurethane is adhered and fixed in b.

According to the saddle-riding type seat 1 for a vehicle of the second embodiment, vibration transmitted from the vehicle body can be reduced and lateral vibration can be prevented as in the first embodiment, and the core plate 61 can be provided. Since it is divided into left and right parts, the required amount of core plate is small and the seat weight can be reduced.
Also, the cost can be reduced.

8 to 10 show a saddle type seat according to a third embodiment of the present invention in which the thickness of the core plate is changed. In the third embodiment, the mounting recess 3c is formed in a generally spherical shape having a deep central portion,
A core plate 6 made of viscoelastic polyurethane in the mounting recess 3c.
2 is fixed by adhesion. The thickness T of the core plate 62 becomes thicker in the central portion where the seat pressure distribution is higher.

According to the vehicular saddle-type seat 1 of the third embodiment, the core plate 62 is divided into two parts, left and right, and the thickness T is set to be thicker at a higher seat pressure distribution. It is possible to more efficiently absorb the vibration transmitted to the driver from the portion with high seat pressure.

11 to 13 show a saddle-riding type seat according to a fourth embodiment of the present invention in which the core plate mounting portion is separate from the seat bottom plate. In this embodiment, an opening 3d is provided in the seat bottom plate 3, and a mounting plate 8 is detachably fixed to the opening 3d from below the vehicle with a mounting screw 9. A mounting recess 8a is provided in a portion of the mounting plate 8 where the seat pressure is high, and a core plate 63 made of viscoelastic polyurethane is adhesively fixed to the mounting recess 8a. The core plate 63 in this embodiment is
Is disposed at a position substantially similar to the core plate of the third embodiment,
Further, they are formed in substantially the same shape.

According to the vehicle saddle-riding type seat 1 of the fourth embodiment, the core plate 63 is fixed to the mounting plate 8, and the mounting plate 8 is detachably fixed to the seat bottom plate 3. The 63 can be easily exchanged, so that it is possible to realize the sitting comfort corresponding to each person's physical constitution difference and taste.

In the present invention, the viscoelastic polyurethane is used as the vibration absorbing plate of the sheet, but the viscoelastic polyurethane itself may be used for other purposes. For example, an example applied to a liner portion of a helmet, which has been conventionally mainly made of polystyrene, will be described with reference to FIGS.
14 and 15 are sectional front views of the helmet.

In the example of FIG. 14, the viscoelastic polyurethane 22 is arranged on the entire inner surface of the outer wall member 21 of the helmet 20, and the pad 23 is attached to the head and the jaw. Further, in the example of FIG. 15, the viscoelastic polyurethanes 22a and 22b are arranged only on the inner ears of the outer wall member 21 of the helmet 20, and the polystyrene 24 and the like are arranged on the other parts, and the head and the chin are covered with the above-mentioned example. Similarly, the pad 23 is attached.

When the viscoelastic polyurethane is used for the liner portion of the helmet as described above, the shock absorbing property can be improved, the sound absorbing effect can be expected, and the hysteresis loss increases so that the head shape easily fits when worn. ,
The usability can be improved.

[0026]

As described above, according to the straddle-type seat for a vehicle of the present invention, the vibration absorber made of viscoelastic polyurethane is arranged on the upper surface of the bottom plate in the region where the seat pressure is equal to or higher than the predetermined value. The vehicle vibration transmitted to the seated person can be reduced without increasing the thickness of the entire seat, the sitting comfort can be improved, and the fatigue caused by long-time running can be reduced.

Further, in the present invention, since the vibration absorbing plate is arranged only in the portion where the seat pressure is high, there is an effect that the seat occupant can be prevented from sideways swinging, which would occur when the vibration absorbing plate is arranged over the entire seat. .

[Brief description of drawings]

FIG. 1 is a sectional side view of a saddle type seat for a motorcycle according to a first embodiment of the present invention.

FIG. 2 is a bottom view of the first embodiment sheet.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a diagram for explaining a vibration reducing effect of the first embodiment sheet.

FIG. 5 is a sectional side view of a saddle type seat for a motorcycle according to a second embodiment of the present invention.

FIG. 6 is a bottom view of the second embodiment sheet.

7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a sectional side view of a saddle type seat for a motorcycle according to a third embodiment of the present invention.

FIG. 9 is a bottom view of the third embodiment sheet.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a sectional side view of a saddle type seat for a motorcycle according to a fourth embodiment of the present invention.

FIG. 12 is a bottom view of the fourth embodiment sheet.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is a cross-sectional front view of a helmet that employs viscoelastic polyurethane.

FIG. 15 is a cross-sectional front view of a helmet that employs viscoelastic polyurethane.

FIG. 16 is a distribution chart of the seat pressure applied to the seat when seated.

[Explanation of symbols]

 1 Vehicle saddle riding type seat 3 Bottom plate (seat bottom plate) 4 Cushion (cushion material) 5 Skin 6,61,62,63 Core plate (vibration absorbing plate)

Claims (1)

[Claims] 1. A straddle-type vehicle seat in which a cushion material is arranged on an upper surface of a seat bottom plate and the cushion material is covered with a skin, and a viscoelastic polyurethane is formed on the upper surface of the bottom plate in a region where a seat pressure is a predetermined value or more. A saddle-type seat for a vehicle, characterized in that a vibration absorbing plate made of is disposed.