JP2022084174A - Cushion support member structure - Google Patents

Abstract

To facilitate reinforcement of a cushion support member by a plurality of reinforcements and by suppressing concentration of a load.SOLUTION: A cushion support member 10 comprises: a plurality of reinforcements 21 to 23; and a joined part 20 formed by intersecting and joining the reinforcements 21 to 23. The reinforcements 21 to 23 include a first reinforcement 21 extending in a first direction, a second reinforcement 22 extending in a second direction, and a third reinforcement 23 extending in a third direction. A first joining line 201 indicating a joined part of the first and second reinforcements 21, 22 and a second joining line 202 indicating a joined part of the second and third reinforcements 22, 23 appear on the surface of the joined part 20. The first and second joining lines 201, 202 are bent from one side to the other side in the thickness direction of a cushion support member 10 to be formed into curves, and one end of the first joining line 201 and one end of the second joining line 202 concentrate at the same position 200 on one side of the thickness direction.SELECTED DRAWING: Figure 5

Description

The present invention relates to the structure of a cushion support member that supports the cushion of the seat.

Conventionally, as a cushion support member for supporting a cushion of a seat, a resin frame in which a metal insert is partially used and a plurality of beads are formed on the surface is known (see Patent Document 1). Each bead is formed in a ridge shape that swells to the front surface side and dents to the back surface side, and the front surface is a curved surface. It is reinforced.

Further, Patent Document 2 discloses a cushion support member having a plurality of reinforcing portions that intersect the central portion in the width direction and are configured as hypotenuses at least a part of which is arranged diagonally with respect to the front-rear direction of the seat. There is. Each reinforcing portion is formed so as to protrude toward the back surface side and recess toward the front surface side, and a plurality of such reinforcing portions are arranged in the front-rear direction of the sheet, and the plurality of reinforcing portions intersect with each other. The cushion support member is reinforced by being arranged in the same direction.

Jitsuzensho 51-138307 Gazette Japanese Unexamined Patent Publication No. 2014-8807

By the way, when the cushion support member is reinforced by a plurality of reinforcing portions, it is easy to reinforce the cushion support member if the plurality of reinforcing portions are arranged so as to intersect each other. If it is, the load is concentrated on the angular portion, and it may be difficult to disperse the load.

The present invention has been made in view of the above circumstances, and an object thereof is to suppress concentration of load and to make it easy to reinforce the cushion support member by a plurality of reinforcing portions.

In order to solve the above problems, the invention according to claim 1 is a structure of a cushion support member that constitutes a seat on which an occupant sits and is provided with a cushion material on the upper surface to support the cushion material.
The cushion support member includes a plurality of reinforcing portions that reinforce the cushion support member, and a joint portion in which the plurality of reinforcing portions are crossed and joined.
The plurality of reinforcing portions include a first reinforcing portion extending in the first direction, a second reinforcing portion extending in the second direction adjacent to the first direction, and a third reinforcing portion extending in the third direction adjacent to the second direction. With a reinforcing part,
On the surface of the joint portion, a first joint line indicating a joint portion between the first reinforcing portion and the second reinforcing portion, and a second joint indicating a joint portion between the second reinforcing portion and the third reinforcing portion are shown. A line appears,
The first joint line and the second joint line are composed of a curve curved from one side to the other side in the thickness direction of the cushion support member.
One end of the first junction line and one end of the second junction line are characterized in that they are gathered at the same position on one side in the thickness direction.

The invention according to claim 2 is characterized in that, in the structure of the cushion support member according to claim 1, a hole is formed on the back surface of the joint portion.

The invention according to claim 3 is the structure of the cushion support member according to claim 2.
The hole is perfectly circular and is formed in a dome shape so as not to penetrate the joint portion.

The invention according to claim 4 is the structure of the cushion support member according to any one of claims 1 to 3.
The cushion support member includes a load receiving portion that receives an occupant load.
A plurality of the joint portions are provided in the front-rear direction of the sheet.
The load receiving portion is arranged outside the seat in the left-right direction with respect to the plurality of joint portions, and is arranged in the middle of the plurality of joint portions in the front-rear direction when the cushion support member is projected from the side surface. It is characterized by being done.

The invention according to claim 5 is the structure of the cushion support member according to claim 4.
The cushion support member includes a bead that reinforces the cushion support member.
The beads are arranged on the lateral side of the seat in the left-right direction with respect to the plurality of joint portions, and are arranged side by side with the load receiving portion at intervals in the front-rear direction when the cushion support member is projected from the side surface. It is characterized by being done.

The invention according to claim 6 is the structure of the cushion support member according to claim 5.
The cushion support member includes the plurality of reinforcing portions extending in the left-right direction of the seat from each of the plurality of joint portions.
There are multiple beads,
Of the plurality of beads, the bead that is arranged in front of the load receiving portion and is closest to the load receiving portion is formed to be longer than the other beads.
The bead closest to the load receiving portion is the bead in the front-rear direction in the plurality of reinforcing portions extending in the left-right direction of the seat from each of the plurality of joint portions when the cushion support member is projected from the side surface. It is characterized by being arranged in the middle.

In order to solve the above problems, the invention according to claim 7 is a structure of a cushion support member which constitutes a seat on which an occupant sits and is provided with a cushion material on the upper surface to support the cushion material.
The cushion support member has a convex shape on the upper surface side and includes a plurality of reinforcing portions for reinforcing the cushion support member, and each of the reinforcing portions has a curved surface on the surface of a portion closest to the cushion material. Moreover, it is characterized in that it is formed in a circular shape in a top view.

The invention according to claim 8 is the structure of the cushion support member according to claim 7.
The cushion support member has a convex shape on the lower surface side and includes a plurality of reinforcing portions for reinforcing the cushion support member, and each of the reinforcing portions has a curved surface on the surface of a portion farthest from the cushion material. Moreover, it is formed in a circular shape in the bottom view.
The plurality of reinforcing portions having a convex shape on the upper surface side and the plurality of reinforcing portions having a convex shape on the lower surface side are characterized in that they are arranged at different positions when projected in the vertical direction. ..

The invention according to claim 9 is the structure of the cushion support member according to any one of claims 1 to 8.
The cushion support member includes a linear member that reinforces the cushion support member.
The plurality of reinforcing portions are characterized in that they are arranged so as to avoid the linear member.

The invention according to claim 10 is the structure of the cushion support member according to any one of claims 1 to 9.
The cushion support member includes a plurality of load distribution holes for distributing the occupant load.
The plurality of reinforcing portions are characterized in that they are arranged so as to avoid the plurality of load distribution holes.

According to the first aspect of the present invention, since the load is easily distributed along the first joint line and the second joint line formed by the curve, the load is concentrated on the joint portion where the plurality of reinforcing portions intersect with each other. It is easy to reinforce the cushion support member by a plurality of reinforcing portions.

According to the second aspect of the present invention, the formation of a hole on the back surface of the joint portion suppresses the increase in the wall thickness of the joint portion, which can contribute to the weight reduction of the cushion support member. Further, if the wall thickness of the joint portion is thick, it becomes difficult for heat to escape at the manufacturing stage, but it becomes easy to prevent such heat from becoming difficult to escape.

According to the invention of claim 3, it becomes easy to disperse the pressure applied to the joint portion.

According to the invention of claim 4, when the cushion support member is projected from the side surface, a plurality of joint portions are arranged in the front-rear direction of the load receiving portion, so that the rigidity of the cushion support member is increased. Can be improved.

According to the fifth aspect of the present invention, when the cushion support member is projected from the side surface, the beads are arranged side by side with a space in the front-rear direction from the load receiving portion. The rigidity of the can be improved.

In the cushion support member, the area of the flat surface portion is often set to be wider on the front side of the seat than on the load receiving portion than on the rear side, and in such a case, the seat of the cushion support member is larger than the load receiving portion. Rigidity on the front side tends to decrease.
On the other hand, according to the invention of claim 6, when the cushion support member is projected from the side surface, a plurality of beads closest to the load receiving portion formed longer than the other beads are present. Since it is arranged in the middle of the front-rear direction in the plurality of reinforcing portions extending from each of the joint portions in the left-right direction of the seat, the rigidity of the cushion support member can be improved.

According to the invention of claim 7, an angular portion is less likely to be generated on the upper surface side of the cushion support member, and the load is easily dispersed along the curved reinforcing portion, so that the concentration of the load is suppressed. , It becomes easy to reinforce the cushion support member by a plurality of reinforcing portions.

According to the eighth aspect of the present invention, it is difficult for an angular portion to be formed on the lower surface side of the cushion support member, and the load is easily dispersed along the curved reinforcing portion, so that the concentration of the load is suppressed. , It becomes easy to reinforce the cushion support member by a plurality of reinforcing portions.
Further, since the plurality of reinforcing portions having a convex shape on the upper surface side and the plurality of reinforcing portions having a convex shape on the lower surface side are arranged at different positions when projected in the vertical direction, the cushion support member can be used. It can be made lighter.

According to the invention of claim 9, a portion of the cushion support member having a relatively low strength without a linear member can be reinforced by a plurality of reinforcing portions, and the rigidity of the cushion support member can be improved.

According to the tenth aspect of the present invention, the rigidity of the cushion support member can be improved by the plurality of reinforcing portions, and the weight of the cushion support member can be reduced by the plurality of load distribution holes.

It is a perspective view which shows the 1st Embodiment of a cushion support member. It is a perspective view which shows the cushion support member. It is a side view which shows the cushion support member. It is a top view which shows the cushion support member. It is a perspective view explaining the main part of the cushion support member. FIG. 4 is a cross-sectional view taken along the line AA in FIG. It is a bottom view which shows the cushion support member. It is an enlarged sectional view explaining the main part of the cushion support member. It is a perspective view which shows the 2nd Embodiment of a cushion support member. It is a side view which shows the cushion support member. It is a top view which shows the cushion support member. It is a bottom view which shows the cushion support member. 11 is a cross-sectional view taken along the line BB in FIG. It is an enlarged perspective view which shows the main part of the cushion support member. It is a top view which shows the 1st modification of a cushion support member. It is a perspective view which shows the 2nd modification of a cushion support member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the technical scope of the present invention is not limited to the following embodiments and illustrated examples. do not have.

In addition, the seats described below include furniture seats and vehicle seats for ships, airplanes, snowmobiles, water bikes, etc., but mainly refer to vehicle seats, and vehicles are motorcycles and automobiles (vehicles). Not only (passenger vehicles), but also bicycles, motorized bicycles, construction vehicles, military vehicles, industrial vehicles, railroad vehicles, and other agricultural vehicles such as cultivators and tractors. Then, the occupant sits on the seat.

Further, the seat includes a cushion support member fixed to the vehicle body, a cushion material provided on the upper surface of the cushion support member and supported, and a skin material for covering the cushion support member and the cushion material. That is, the seat is configured such that the cushion material is supported on the cushion support member and is covered with the skin material.

The cushion support member is a resin molded product obtained by molding a resin material such as polypropylene or polyvinyl chloride, is molded so as to have a shape corresponding to the vehicle body in a vehicle, and is mounted on the vehicle body. Therefore, it is said to be particularly hard. Further, the cushion support member may be attached with metal fittings or the like necessary for fixing to the vehicle body, or metal may be inserted at the manufacturing stage.

The cushion material is made of a flexible foam material such as urethane foam, polypropylene foam, or polyethylene foam, and is softer than the cushion support member.
Further, since the cushion material is supported on the upper surface of the cushion support member, the lower surface of the cushion material has a shape that easily matches the shape of the upper surface of the cushion support member. This makes it easier to stably support the cushion material by the upper surface of the cushion support member.
Further, the surfaces where the cushion support member and the cushion material are in contact with each other, that is, the upper surface of the cushion support member and the lower surface of the cushion material are set as reference surfaces, respectively.

The skin material is a portion that constitutes the seat surface of the seat and comes into contact with the occupant, and a resin material, synthetic leather, cloth, genuine leather, or the like is appropriately adopted.
The end of the skin material is folded into the back surface (lower surface) side of the cushion support member and fixed to the cushion support member. The terminal of the skin material refers to the entire peripheral edge of the skin material. Therefore, the end of this skin material is fixed over the entire peripheral edge of the cushion support member.

[First Embodiment]
Hereinafter, the first embodiment of the cushion support member 10 will be described in detail.
The cushion support member 10 in the present embodiment constitutes a seat for a motorcycle. The cushion support member 10 constituting the seat of the motorcycle is also referred to as a bottom plate.

Since the cushion support member 10 in the present embodiment is a resin molded product as described above, most of the parts are integrally formed, and accessories are attached as needed. In other words, the cushion support member 10 is mainly composed of the main body plate 11, and as shown in FIGS. 1 to 8, a state in which a portion having each function is integrally formed with the main body plate 11. It has become.

As shown in FIGS. 1 to 3, the main body plate 11 is formed so that the portion on which the occupant sits is lower than the other portions in the side view. The vicinity of the part formed so as to be lower than the other parts is the part corresponding to the ischial position of the occupant driving the motorcycle, and the load by the occupant (occupant load) is the most applied among the seats. The maximum load portion 11a is used.

Further, the main body plate 11 has a peripheral edge reinforcing portion 12 provided along the peripheral edge of the main body plate 11. That is, such a peripheral edge reinforcing portion 12 can improve the rigidity of the peripheral edge of the main body plate 11.

The peripheral edge reinforcing portion 12 refers to a portion integrally formed on the peripheral edge of the main body plate 11 and projecting outward in a brim shape, and is a front peripheral edge reinforcing portion located forward with the vicinity of the maximum load portion 11a as a boundary. It has 12a and a rear peripheral edge reinforcing portion 12b located rearward.
The front peripheral edge reinforcing portion 12a reinforces the front side of the peripheral edge of the main body plate 11, and the rear peripheral edge reinforcing portion 12b reinforces the rear side of the peripheral edge of the main body plate 11.

Further, the main body plate 11 has a side wall portion 13 provided along the peripheral edge of the main body plate 11. More specifically, the side wall portion 13 is a side wall extending downward from the left and right peripheral edges on the upper surface of the main body plate 11, and the end portions in the front-rear direction are integrally formed with the front peripheral edge reinforcing portion 12a and the rear peripheral edge reinforcing portion 12b. ing.

Further, the main body plate 11 has a rear wall portion 14 provided along the peripheral edge of the main body plate 11. More specifically, the rear wall portion 14 is a rear wall extending downward from the trailing edge on the upper surface of the main body plate 11, and is integrally formed with the rear peripheral edge reinforcing portion 12b.

The peripheral edge reinforcing portion 12 and the side wall portion 13 are formed with a plurality of engaging hole portions 15 with which the engaging members provided at the ends of the skin material are engaged.

The cushion support member 10 includes a joint portion 20, a plurality of reinforcing portions 21 to 24, a plurality of load receiving portions 25 to 27, and a plurality of beads 28 to 30 as portions integrally formed with the main body plate 11. , With a plurality of protrusions 32.

Each of the plurality of reinforcing portions 21 to 24 has a ridge-shaped shape (kamaboko type) having a curved surface, and is formed in the central portion of the main body plate 11 to reinforce the cushion support member 10.
The joint portion 20 refers to a portion where a plurality of reinforcing portions 21 to 24 intersect and are joined to each other.
The central portion of the main body plate 11 is formed by projecting the plurality of reinforcing portions 21 to 24 and the joint portion 20 upward, and the other portions are recessed downward as the recessed portion 11b.

The plurality of reinforcing portions 21 to 24 include a first reinforcing portion 21 extending in the first direction (right side), a second reinforcing portion 22 extending in the second direction (rear side) adjacent to the first direction, and a second reinforcing portion 22 in the second direction. It has a third reinforcing portion 23 extending in the adjacent third direction (left side) and a fourth reinforcing portion 24 extending in the fourth direction (front side) adjacent to the first direction and the third direction.
That is, as shown in FIG. 4, the plurality of reinforcing portions 21 to 24 in the present embodiment are arranged in a cross shape (front-back and left-right) in the top view, and intersect vertically in the left-right direction and the front-back direction.

The joint portion 20 is a portion where the plurality of reinforcing portions 21 to 24 are crossed and joined as described above, and at the same time, the joint portion 20 is a base end portion when the plurality of reinforcing portions 21 to 24 extend in each direction. It is a part that becomes.
A plurality of such joints 20 are provided on the main body plate 11. These plurality of joint portions 20 are arranged at intervals in the front-rear direction and at intervals in the left-right direction, and six joint portions 20 are provided in the present embodiment. Therefore, a plurality of reinforcing portions 21 to 24 are provided so as to extend from each of the six joint portions 20.

In the present embodiment, the plurality of reinforcing portions 21 to 24 between the adjacent joint portions 20 are integrally formed.
That is, the first reinforcing portion 21 extending to the right in the first direction and the third reinforcing portion 23 extending to the left in the third direction are integrally formed between the joint portions 20 adjacent to the left and right. Further, the second reinforcing portion 22 extending to the rear side in the second direction and the fourth reinforcing portion 24 extending to the front side in the fourth direction are integrally formed between the joint portions 20 adjacent to each other in the front-rear direction.
However, the present invention is not limited to this, and the plurality of reinforcing portions 21 to 24 arranged between the adjacent joint portions 20 may be separated from each other without being integrally formed.

On the surface of the joint portion 20, as shown in FIG. 5, a first joint line 201 indicating a joint portion between the first reinforcing portion 21 and the second reinforcing portion 22, and a second reinforcing portion 22 and a third reinforcing portion 23 are provided. The second joint line 202 indicating the joint portion between the third reinforcing portion 23 and the fourth reinforcing portion 24, the third joint line 203 indicating the joint portion between the third reinforcing portion 23 and the fourth reinforcing portion 24, and the fourth reinforcing portion 24 and the first reinforcing portion 21. The fourth joint line 204, which indicates the joint location, appears.
Further, as described above, since the plurality of reinforcing portions 21 to 24 are formed in a ridge-shaped shape (kamaboko shape), the first joint line 201, the second joint line 202, the third joint line 203, and the fourth joint line are formed. The 204 is composed of a curved line that curves from one side to the other side in the thickness direction of the cushion support member 10 (joint portion 20).
In FIG. 5 and the like, the first joint line 201, the second joint line 202, the third joint line 203, and the fourth joint line 204 are represented by clear solid lines for convenience of explanation, but they are clear in the actual product. The solid line does not have to be represented.

Then, one end of the first joint line 201, one end of the second joint line 202, one end of the third joint line 203, and one end of the fourth joint line 204 are the cushion support member 10 (joint portion). 20) They are gathered at the same position on one side in the thickness direction.
As described above, since the plurality of reinforcing portions 21 to 24 are formed so as to project upward, the same position on one side in the thickness direction is the position 200 (hereinafter, apex) located at the uppermost position of the joint portion 20. 200). On the other side in the thickness direction, there is a portion constituting the recessed portion 11b of the main body plate 11.
That is, one end of the first junction line 201, one end of the second junction line 202, one end of the third junction line 203, and one end of the fourth junction line 204 gather at the apex 200 of the junction portion 20. is doing.
The first junction line 201, the second junction line 202, the third junction line 203, and the fourth junction line 204 intersect vertically in the top view.

The plurality of reinforcing portions 21 to 24 are crossed and joined at the joint portion 20, and the joint lines 201 to 204 between the reinforcing portions 21 to 24 are curved from the apex 200 at the joint portion 20 toward the recessed portion 11b. It is composed of curves. Therefore, the surface of the joint portion 20 of the plurality of reinforcing portions 21 to 24 is in a rounded state, and no angular portion is generated.

As shown in FIGS. 6 and 7, holes 20a are formed on the back surface of the joint portion 20. The hole 20a is a perfect circle and is formed in a dome shape so as not to penetrate the joint portion 20.

Further, as shown in FIGS. 6 to 8, the plurality of reinforcing portions 21 to 24 are formed in a recessed state on the back surface side of the main body plate 11. That is, the plurality of reinforcing portions 21 to 24 are also formed as holes (hereinafter, recessed portions 21a to 24a) that do not penetrate in the vertical direction when viewed from the bottom.
The recessed portions 21a to 24a of the plurality of reinforcing portions 21 to 24 are formed so that the ends of the joint portions 20 on the hole 20a side are rounded. The recessed portions 21a to 24a of the plurality of reinforcing portions 21 to 24 are not integrated with the holes 20a of the joint portions 20.
The recessed portion 21a of the first reinforcing portion 21 extending to the right in the first direction and the recessed portion 23a of the third reinforcing portion 23 extending to the left in the third direction are holes 20a of the joint portions 20 adjacent to each other on the left and right. It is integrally formed between them. Further, the recessed portion 22a of the second reinforcing portion 22 extending to the rear side in the second direction and the recessed portion 24a of the fourth reinforcing portion 24 extending to the front side in the fourth direction are formed between the joint portions 20 adjacent to each other in the front-rear direction. It is integrally formed.

The surface of the plurality of reinforcing portions 21 to 24 is formed in a ridge-shaped shape (kamaboko shape) as described above, and is formed in a recessed state on the back surface side. Therefore, as shown in FIG. 8, the cross sections of the plurality of reinforcing portions 21 to 24 are shaped to draw a semicircle.
Further, among the plurality of reinforcing portions 21 to 24 formed in a semicircular shape, the root portion Rt on the portion side constituting the recessed portion 11b is thick. That is, the root portion Rt is formed to be thicker than the other portions. The root portion Rt is likely to be loaded with an occupant among the reinforcing portions 21 to 24. Therefore, if the root portion Rt is thick in this way, the portion on which the occupant load is likely to be applied can be reinforced, and as a result, the occupant load can be easily dispersed.

Further, the plurality of reinforcing portions 21 to 24 in the present embodiment are all set to have the same cross-sectional size, but the size is not limited to this, and the sizes may be different for each reinforcing portion 21 to 24. good.

In this embodiment, four reinforcing portions 21 to 24 are used, but the present invention is not limited to this, and may be three or five or more.
In the case of three reinforcing portions, they intersect in a T-shape or a Y-shape. There may be one joint or a plurality of joints.
In the case of five or more reinforcing portions, the number of joints may be one or multiple, but when there are a plurality of joints, the number of reinforcing portions intersecting at each joint is not necessarily the same. good.

Subsequently, the plurality of load receiving portions 25 to 27 are portions located between the cushion support member 10 and the vehicle body to receive the occupant load, and as shown in FIGS. 1 to 4, 6 to 8, the plurality of load receiving portions 25 to 27 are located between the cushion support member 10 and the vehicle body. It is arranged on both sides in the left-right direction of the plurality of joints 20.
The plurality of load receiving portions 25 to 27 include a first load receiving portion 25 located on the front side, a second load receiving portion 26 located on the central portion side, and a third load receiving portion 27 located on the rear side. Have.

Here, the load receiving portions 25 to 27 refer to the portion itself fixed to the vehicle body, and at the same time, refer to an elastic member such as rubber attached to the portion and a portion to which the elastic member is attached. This elastic member is softer than the cushion support member 10, and is fixed to the lower surface of the cushion support member 10 by, for example, welding. Alternatively, an insertion hole is formed in the cushion support member 10, an insertion portion to be inserted into the insertion hole is formed in the elastic member of the load receiving portions 25 to 27, and the insertion portion is inserted into the insertion hole. The elastic member of the load receiving portions 25 to 27 may be fixed to the cushion support member 10 by fitting with.

Of the plurality of load receiving portions 25 to 27, the second load receiving portion 26 located on the central portion side is arranged in the vicinity of the maximum load portion 11a of the main body plate 11. Therefore, the second load receiving portion 26 receives an occupant load more than the first load receiving portion 25 and the third load receiving portion 27.
The second load receiving portion 26 is arranged in the middle of the plurality of joint portions 20 in the front-rear direction when the cushion support member 10 is projected from the side surface. That is, in the plurality of joint portions 20, when the cushion support member 10 is projected from the side surface, the two joint portions 20 are arranged at intervals in the front-rear direction, but the second load receiving portion 26 is arranged. , It will be in the state of being placed in the middle.

The first load receiving portion 25 is integrally formed with the front peripheral edge reinforcing portion 12a in the peripheral edge reinforcing portion 12 of the main body plate 11 and the recessed portions 11b located on both the front left and right sides of the main body plate 11.
The third load receiving portion 27 is integrally formed with the rear peripheral edge reinforcing portion 12b in the peripheral edge reinforcing portion 12 of the main body plate 11.

Further, a bolt hole is formed near the center of the plurality of load receiving portions 25 to 27, and the cushion support member 10 can be fixed to the vehicle body by the bolt inserted from the bolt hole.

Subsequently, the plurality of beads 28 to 30 have a reinforcing shape for reinforcing the cushion support member 10, and are arranged outside the plurality of joint portions 20 in the left-right direction as shown in FIGS. 1 to 4 and 7. Has been done.
The plurality of beads 28 to 30 have a first bead 28 located on the front side, a second bead 29 located on the central portion side, and a third bead 30 located on the rear side.
These plurality of beads 28 to 30 are arranged in the vicinity of the maximum load portion 11a of the main body plate 11, and are bent and formed from the upper surface of the main body plate 11 to the side wall portion 13. That is, the vicinity of the maximum load portion 11a on which the occupant load is most likely to be applied is reinforced by the plurality of beads 28 to 30 among the cushion support members 10.

Of the plurality of beads 28 to 30, the second bead 29, which is arranged in front of the second load receiving portion 26 and is closest to the second load receiving portion 26, is located closest to the maximum load portion 11a. The length from the upper end to the lower end is longer than that of the other beads 28 and 30.
The second bead 29 is front and rear in a plurality of reinforcing portions (first reinforcing portion 21 or third reinforcing portion 23) extending in the left-right direction from each of the plurality of joint portions 20 when the cushion support member 10 is projected from the side surface. It is located in the middle of the direction. That is, in the plurality of joints 20, when the cushion support member 10 is projected from the side surface, the two joints 20 are arranged at intervals in the front-rear direction, and the second bead 29 is the second bead 29. It will be placed in the middle.

Further, the first bead 28 located on the front side is arranged in front of the joint portion 20 located on the front side among the plurality of joint portions 20 when the cushion support member 10 is projected from the side surface.
Further, the third bead 30 located on the rear side is arranged at a position overlapping the joint portion 20 located on the rear side among the plurality of joint portions 20 when the cushion support member 10 is projected from the side surface.

A fourth bead 31 for reinforcing the front peripheral edge reinforcing portion 12a is formed in the front peripheral edge reinforcing portion 12a of the peripheral edge reinforcing portion 12.

Subsequently, the plurality of projecting portions 32 are portions fixed to the vehicle body, are arranged on the front side of the cushion support member 10 as shown in FIGS. 2 and 7, and are arranged forward from the back surface of the cushion support member 10. It protrudes toward you. Further, these plurality of projecting portions 32 are arranged adjacent to the inside of the first load receiving portions 25 provided on both sides of the cushion support member 10 in the left-right direction in the left-right direction.
Further, each protruding portion 32 is formed with a through hole 32a that penetrates the protruding portion 32 in the vertical direction.

At least one bead is formed between the plurality of projecting portions 32 and the second load receiving portions 26 provided on both left and right sides of the cushion support member 10 when the cushion support member 10 is projected from the side surface. It is provided.
In the present embodiment, when the cushion support member 10 is projected from the side surface, the first bead 28 and the second bead 29 are provided between the plurality of projecting portions 32 and the second load receiving portion 26. ,

Further, the inner side edge portions on the inner side in the left-right direction of the plurality of projecting portions 32 are provided at the center in the left-right direction of the fourth reinforcing portion 24. The protruding portion 32 is integrally formed with the recessed portion 24a of the fourth reinforcing portion 24.

According to the first embodiment as described above, on the surface of the joint portion 20, the first joint line 201 indicating the joint portion between the first reinforcing portion 21 and the second reinforcing portion 22, and the second reinforcing portion 22 and the second reinforcing portion 22. At least the second joint line 202 indicating the joint portion with the three reinforcing portions 23 appears, and the first joint line 201 and the second joint line 202 are from one side (vertex 200) in the thickness direction of the cushion support member 10 to the other. It is composed of a curved line that curves toward the side (the portion constituting the recessed portion 11b), and one end of the first joining line 201 and one end of the second joining line 202 are at the same position on one side in the thickness direction (vertex 200). ), The load can be easily distributed along the first joint line 201 and the second joint line 202, which are composed of curves. Concentration of the load is suppressed, and the cushion support member 10 can be easily reinforced by the plurality of reinforcing portions 21 to 24.

Further, since the hole 20a is formed on the back surface of the joint portion 20, it is possible to prevent the joint portion 20 from becoming thicker, which contributes to weight reduction of the cushion support member 10. Further, if the wall thickness of the joint portion 20 is thick, it becomes difficult for heat to escape at the manufacturing stage, but it becomes easy to prevent such heat from becoming difficult to escape.

Further, since the hole 20a is a perfect circle and is formed in a dome shape and does not penetrate the joint portion 20, the pressure applied to the joint portion 20 can be easily dispersed.

Further, the second load receiving portion 26 is arranged on the lateral side of the seat in the left-right direction with respect to the plurality of joint portions 20, and is intermediate in the front-rear direction in the plurality of joint portions 20 when the cushion support member 10 is projected from the side surface. When the cushion support member 10 is projected from the side surface, the plurality of joint portions 20 are arranged in the front-rear direction of the second load receiving portion 26. Rigidity can be improved.

Further, the second bead 29 is arranged on the lateral side of the seat in the left-right direction with respect to the plurality of joint portions 20, and is spaced apart from the second load receiving portion 26 in the front-rear direction when the cushion support member 10 is projected from the side surface. Since the cushion support members 10 are arranged side by side with a gap, the second bead 29 is arranged side by side with a space in the front-rear direction from the second load receiving portion 26 when the cushion support member 10 is projected from the side surface. Therefore, the rigidity of the cushion support member 10 can be improved.

In the cushion support member 10, the area of the flat surface portion of the front side of the seat is often set to be wider than that of the rear side of the second load receiving portion 26, and in such a case, the second of the cushion support members 10 is set. The rigidity on the front side of the seat is more likely to decrease than the load receiving portion 26.
On the other hand, when the cushion support member 10 is projected from the side surface, the second bead 29, which is formed longer than the other beads 28 and 30, and is closest to the second load receiving portion, has a plurality of joint portions. Since it is arranged in the middle of the front-rear direction in the plurality of reinforcing portions 22 and 24 extending from each of the 20 in the left-right direction, the rigidity of the cushion support member 10 can be improved.

[Second Embodiment]
Hereinafter, the second embodiment of the cushion support member 40 will be described in detail.
The cushion support member 40 in this embodiment constitutes a seat for a motorcycle.
For convenience of explanation, the same reference numerals are given to the common parts with the first embodiment, and the description will be focused on the components different from the first embodiment.

Since the cushion support member 40 in the present embodiment is a resin molded product as described above, most of the parts are integrally formed, and accessories are attached as needed. In other words, the cushion support member 40 is mainly composed of the main body plate 11, and as shown in FIGS. 9 to 14, a state in which a portion having each function is integrally formed with the main body plate 11. It has become.

As shown in FIGS. 9 and 10, the main body plate 11 is formed so that the portion on which the occupant sits is lower than the other portions in the side view, and is regarded as the maximum load portion 11a.
Further, the main body plate 11 has a peripheral edge reinforcing portion 12 provided along the peripheral edge of the main body plate 11. The peripheral edge reinforcing portion 12 has a front peripheral edge reinforcing portion 12a located in the front with the vicinity of the maximum load portion 11a as a boundary, and a rear peripheral edge reinforcing portion 12b located in the rear.
Further, the main body plate 11 is provided along the peripheral edge of the main body plate 11, and has a side wall portion 13 having an end portion in the front-rear direction integrally formed with the front peripheral edge reinforcing portion 12a and the rear peripheral edge reinforcing portion 12b.
Further, the main body plate 11 has a rear wall portion 14 provided along the peripheral edge of the main body plate 11.
The peripheral edge reinforcing portion 12 and the side wall portion 13 are formed with a plurality of engaging hole portions 15 with which the engaging members provided at the ends of the skin material are engaged.
Further, at the front end portion of the main body plate 11, a through hole 11c is formed at a position located above a plurality of protruding portions 43, which will be described later.

As shown in FIGS. 9 to 14, the cushion support member 40 includes a plurality of reinforcing portions 41 and 42, a plurality of load receiving portions 25 to 27, and a plurality of portions as portions integrally formed with the main body plate 11. It is provided with a protrusion 43.

The plurality of load receiving portions 25 to 27 are arranged on both the outer sides of the main body plate 11 in the left-right direction. The plurality of load receiving portions 25 to 27 include a first load receiving portion 25 located on the front side, a second load receiving portion 26 located on the central portion side, and a third load receiving portion 27 located on the rear side. Have.
Of the plurality of load receiving portions 25 to 27, the second load receiving portion 26 located on the central portion side is arranged in the vicinity of the maximum load portion 11a of the main body plate 11.

The plurality of reinforcing portions 41 and 42 are formed in the central portion of the main body plate 11 to reinforce the cushion support member 10.
Such a plurality of reinforcing portions 41 and 42 have a plurality of first reinforcing portions 41 having a convex shape on the upper surface side and a plurality of second reinforcing portions 42 having a convex shape on the lower surface side.

Each of the plurality of first reinforcing portions 41 has a curved surface on the surface of the portion closest to the cushion material, and is formed in a circular shape when viewed from above.
Each of the plurality of second reinforcing portions 42 has a curved surface on the surface of the portion farthest from the cushion material, and is formed in a circular shape in the bottom view.

Since the surface of the protruding portion of these plurality of reinforcing portions 41 and 42 is curved and formed in a circular shape, they appear as if they were spheres or hemispheres when viewed from above or below. It will be.

Further, as shown in FIG. 13, the plurality of first reinforcing portions 41 are formed in a recessed state on the back surface side of the main body plate 11. That is, the plurality of first reinforcing portions 41 are formed as holes (hereinafter, recessed portions 41a) that do not penetrate upward when viewed from the bottom.
On the other hand, the plurality of second reinforcing portions 42 are formed in a recessed state on the back surface side of the main body plate 11. That is, the plurality of second reinforcing portions 42 are formed as holes (hereinafter, recessed portions 42a) that do not penetrate downward when viewed from above.
The recessed portions 41a and 42a are formed in a dome shape in top view or bottom view.

The plurality of first reinforcing portions 41 having a convex shape on the upper surface side and the plurality of second reinforcing portions 42 having a convex shape on the lower surface side are different when the cushion support member 40 is projected in the vertical direction. It is placed in a position.
That is, the plurality of reinforcing portions 41 and 42 are arranged in such a positional relationship that they are staggered both in the planar positional relationship of the main body plate 11 and in the vertical positional adjustment. More specifically, the plurality of first reinforcing portions 41 are arranged in a staggered pattern, and the plurality of second reinforcing portions 42 are staggered in a positional relationship avoiding the staggered arrangement in the plurality of first reinforcing portions 41. Have been placed.

Subsequently, the plurality of projecting portions 43 are portions fixed to the vehicle body, are arranged on the front side of the cushion support member 40 as shown in FIGS. 9 to 12, and are arranged forward from the back surface of the cushion support member 40. It protrudes toward you. Further, these plurality of projecting portions 43 are arranged adjacent to the inside of the first load receiving portions 25 provided on both left and right sides of the cushion support member 40 in the left and right direction.

According to the second embodiment as described above, the cushion support member 40 has a convex shape on the upper surface side and includes a plurality of first reinforcing portions 41 for reinforcing the cushion support member 40, and the first reinforcing portion is provided. In each of the 41, the surface of the portion closest to the cushion material is a curved surface, and since it is formed in a circular shape in the top view, it is difficult for an angular portion to be formed on the upper surface side of the cushion support member 40, and it is a curved surface. The load is easily distributed along the first reinforcing portion 41. As a result, the concentration of the load is suppressed, and the cushion support member 40 can be easily reinforced by the plurality of first reinforcing portions 41.

Further, the cushion support member 40 has a convex shape on the lower surface side and includes a plurality of second reinforcing portions 42 for reinforcing the cushion support member 40, and each of the second reinforcing portions 42 is the farthest from the cushion material. Since the surface of the portion is curved and is formed in a circular shape in the bottom view, it is difficult for an angular portion to be formed on the lower surface side of the cushion support member 40, and a load is applied along the curved second reinforcing portion 42. Is easy to disperse. As a result, the concentration of the load is suppressed, and the cushion support member 40 can be easily reinforced by the plurality of second reinforcing portions 42.

Further, the plurality of first reinforcing portions 41 having a convex shape on the upper surface side and the plurality of second reinforcing portions 42 having a convex shape on the lower surface side are different when the cushion support member 40 is projected in the vertical direction. Since it is arranged at the position, it is possible to prevent the cushion support member 40 from increasing in thickness and reduce the weight of the cushion support member 40.

[Modification example]
The embodiment to which the present invention is applicable is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. Hereinafter, a modified example will be described. The following modifications may be combined as much as possible.
Further, in each of the following modifications, the elements common to the above embodiments are designated by a common reference numeral, and the description thereof will be omitted or simplified.

[Modification 1]
The cushion support member 50 in this modification constitutes a seat cushion in a passenger car seat. More specifically, in the seat cushion, the cushion support member 50 is attached to the cushion frame, the cushion material is provided on the upper surface of the cushion support member 50, and the cushion frame, the cushion support member 50, and the cushion are covered with the skin material. It is formed by.
The cushion support member 50 constituting the seat of a passenger car is also referred to as a support plate or a pressure receiving member.

Although not shown, the cushion frame has a pair of left and right side frames, a rod-shaped front frame that connects the front ends of the pair of left and right side frames to each other, and a rod-shaped front frame that connects the rear ends of the pair of left and right side frames to each other. It has a rear frame and a pan frame connected to the front ends of a pair of left and right side frames.
The cushion support member 50 is provided so as to be bridged between a rod-shaped front frame and a rod-shaped rear frame in the cushion frame.

As shown in FIG. 15, the cushion support member 50 is inclined outward from the main body plate 51 extending substantially parallel to the cushion frame and the left and right side edges at the rear portion of the main body plate 51 toward the front side (upper side). 52, the front mounting portion 53 extending forward from the front edge of the main body plate 51 and engaging with the front frame, and the front mounting portion 53 extending diagonally upward and backward from the rear edge of the main body plate 51 to the rear frame. It has a rear mounting portion 54 to engage with.
Further, the cushion support member 50 is formed of a resin in which a metal wire 55 (linear member) is insert-molded, bends under the load of an occupant, and elastically supports the occupant.

A sensor mounting portion 56 on which a pressure sensor (not shown) is mounted is formed on the front side of the central portion in the left-right direction in the front portion of the main body plate 51.
The pressure sensor detects the pressure applied to the seat cushion to determine whether the occupant is seated on the seat. Since the load of the occupant is distributed to the rear portion of the main body plate 51 by the inclined portion 52, the pressure applied at the time of sitting is reduced. Therefore, the pressure sensor is arranged at a position offset forward with respect to the inclined portion 52 so as not to be affected by the pressure distribution by the inclined portion 52.

Further, the main body plate 51 is appropriately formed with openings 57 and 58 necessary for ventilation and attachment of members. It is assumed that these openings 57 and 58 also have a function of distributing the occupant load. The wire 55 is arranged so as to avoid these openings 57 and 58.

The cushion support member 50 includes a plurality of reinforcing portions 41, 42 for reinforcing the cushion support member 50. Further, these plurality of reinforcing portions 41 and 42 are integrally formed with the main body plate 51.
The plurality of reinforcing portions 41 and 42 are arranged so as to avoid the wire 55, the sensor mounting portion 56, and the openings 57 and 58 in the main body plate 51. More specifically, the plurality of reinforcing portions 41 and 42 are integrally formed with the central portion of the main body plate 51 and the left and right inclined portions 52.

The plurality of reinforcing portions 41 and 42 in this modification has a plurality of first reinforcing portions 41 having a convex shape on the upper surface side and a plurality of second reinforcing portions 42 having a convex shape on the lower surface side. However, the present invention is not limited to this, and the first reinforcing portion 21 extending in the first direction, the second reinforcing portion 22 extending in the second direction, and the third reinforcing portion 23 extending in the third direction are adopted. , Which may be adopted.

Regarding the sensor mounting portion 56, in order to ensure the accuracy of the mounted pressure sensor, the plurality of reinforcing portions 41 and 42 are arranged so as to avoid the periphery of the sensor mounting portion 56.
If it is necessary to improve the rigidity of the sensor mounting portion 56 and its surroundings, a plurality of reinforcing portions may be integrally formed on the side (lower surface side) of the main body plate 51 opposite to the cushion material. It is preferable to do so. As a result, the influence on the sensor can be suppressed.

According to this modification, the portion of the cushion support member 50 having a relatively low strength without the wire 55 can be reinforced by the plurality of reinforcing portions 41 and 42, and the rigidity of the cushion support member 50 can be improved.
Further, the rigidity of the cushion support member 50 can be improved by the plurality of reinforcing portions 41 and 42, and the weight of the cushion support member 50 can be reduced by the openings 57 and 58 that function as load distribution holes.

[Modification 2]
The cushion support member 60 in this modification constitutes a seat of a motorcycle, and a cushion material is provided on the upper surface thereof and is covered with a skin material.
Such a cushion support member 60 includes a main body plate 61 and a plurality of load distribution holes 62 for distributing occupant loads.

Rib portions 61a projecting upward are integrally formed on the left and right side edges of the main body plate 61 to improve the rigidity of the main body plate 61.
The plurality of load distribution holes 62 are arranged between the left and right rib portions 61a of the main body plate 61, and are formed so as to penetrate the main body plate 61.
The plurality of load distribution holes 62 are formed in the main body plate 61 in consideration of the opening area and the positions of the ischia and coccyx so that the occupant load can be effectively dispersed.

While the occupant load can be effectively dispersed in this way, since a plurality of holes are formed in the main body plate 61, reinforcement of the main body plate 61 is required.
Therefore, in this modification, a plurality of reinforcing portions 21, 22 and 23 are integrally formed on the main body plate 61 and arranged so as to avoid the plurality of load distribution holes 62.
On the surface of the joint portion 20 in which the plurality of reinforcing portions 21, 22 and 23 are joined by intersecting with each other, the first joint line 201 and the second joint line 202 formed by a curved line appear.

According to this modification, the rigidity of the cushion support member 60 can be improved by the plurality of reinforcing portions 21, 22, 23, and the weight of the cushion support member 60 can be reduced by the plurality of load distribution holes 62.

10 Cushion support member 11 Main body plate 11a Maximum load part 11b Recessed part 20 Joint part 20a Hole 200 Vertex 201 First joint line 202 Second joint line 203 Third joint line 204 Fourth joint line 21 First reinforcement part 21a Recessed part 22 2nd Reinforcing Part 22a Reinforcement Part 23 3rd Reinforcing Part 23a Recessing Part 24 4th Reinforcing Part 24a Reinforcing Part Rt Root Part 25 1st Load Receiving Part 26 2nd Load Receiving Part 27 3rd Load Receiving Part 28 1st Bead 29 2nd bead 30 3rd bead 31 4th bead 32 protruding part 32a through hole 40 cushion support member 41 first reinforcing part 41a recessed part 42 second reinforcing part 42a recessed part 43 protruding part

Claims (10)

It is a structure of a cushion support member that constitutes a seat on which an occupant sits and is provided with a cushion material on the upper surface to support the cushion material.
The cushion support member includes a plurality of reinforcing portions that reinforce the cushion support member, and a joint portion in which the plurality of reinforcing portions are crossed and joined.
The plurality of reinforcing portions include a first reinforcing portion extending in the first direction, a second reinforcing portion extending in the second direction adjacent to the first direction, and a third reinforcing portion extending in the third direction adjacent to the second direction. With a reinforcing part,
On the surface of the joint portion, a first joint line indicating a joint portion between the first reinforcing portion and the second reinforcing portion, and a second joint indicating a joint portion between the second reinforcing portion and the third reinforcing portion are shown. A line appears,
The first joint line and the second joint line are composed of a curve curved from one side to the other side in the thickness direction of the cushion support member.
A structure of a cushion support member, characterized in that one end of the first joint line and one end of the second joint line are gathered at the same position on one side in the thickness direction. The structure of the cushion support member according to claim 1, wherein a hole is formed on the back surface of the joint portion. The structure of the cushion support member according to claim 2, wherein the hole is a perfect circle and is formed in a dome shape so as not to penetrate the joint portion. The cushion support member includes a load receiving portion that receives an occupant load.
A plurality of the joint portions are provided in the front-rear direction of the sheet.
The load receiving portion is arranged outside the seat in the left-right direction with respect to the plurality of joint portions, and is arranged in the middle of the plurality of joint portions in the front-rear direction when the cushion support member is projected from the side surface. The structure of the cushion support member according to any one of claims 1 to 3, wherein the cushion support member is made. The cushion support member includes a bead that reinforces the cushion support member.
The beads are arranged on the lateral side of the seat in the left-right direction with respect to the plurality of joint portions, and are arranged side by side with the load receiving portion at intervals in the front-rear direction when the cushion support member is projected from the side surface. The structure of the cushion support member according to claim 4, wherein the cushion support member is provided. The cushion support member includes the plurality of reinforcing portions extending in the left-right direction of the seat from each of the plurality of joint portions.
There are multiple beads,
Of the plurality of beads, the bead that is arranged in front of the load receiving portion and is closest to the load receiving portion is formed to be longer than the other beads.
The bead closest to the load receiving portion is the bead in the front-rear direction in the plurality of reinforcing portions extending in the left-right direction of the seat from each of the plurality of joint portions when the cushion support member is projected from the side surface. The structure of the cushion support member according to claim 5, wherein the cushion support member is arranged in the middle. It is a structure of a cushion support member that constitutes a seat on which an occupant sits and is provided with a cushion material on the upper surface to support the cushion material.
The cushion support member has a convex shape on the upper surface side and includes a plurality of reinforcing portions for reinforcing the cushion support member, and each of the reinforcing portions has a curved surface on the surface of a portion closest to the cushion material. Moreover, the structure of the cushion support member is characterized in that it is formed in a circular shape when viewed from above. The cushion support member has a convex shape on the lower surface side and includes a plurality of reinforcing portions for reinforcing the cushion support member, and each of the reinforcing portions has a curved surface on the surface of a portion farthest from the cushion material. Moreover, it is formed in a circular shape in the bottom view.
The plurality of reinforcing portions having a convex shape on the upper surface side and the plurality of reinforcing portions having a convex shape on the lower surface side are characterized in that they are arranged at different positions when projected in the vertical direction. The structure of the cushion support member according to claim 7. The cushion support member includes a linear member that reinforces the cushion support member.
The structure of the cushion support member according to any one of claims 1 to 8, wherein the plurality of reinforcing portions are arranged so as to avoid the linear member. The cushion support member includes a plurality of load distribution holes for distributing the occupant load.
The structure of the cushion support member according to any one of claims 1 to 9, wherein the plurality of reinforcing portions are arranged so as to avoid the plurality of load distribution holes.

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