JP2012101661A - Seat back structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise convenience of a vehicle by enlarging a space in which a load can be put on surroundings of a driver's seat at a cab-over truck.SOLUTION: A tray hinge 37 is arranged at a lower end of a center seat back 3 of a passenger seat carried in a vehicle and is rotatable in a vehicle cross direction. A seat back 3 is split into two in the cross direction and is composed of a first seat back 31 at a front side and a second seat back 32 at a rear side. The first seat back 31 can fall down forward and can be used as a tray by forming a tray recess 341 in the center by the back surface side, and the second seat back 32 forms a second recess 355 for a glove compartment by projecting the central part to a vehicle rear side, and part of the second recess 355 is blocked, and a guide member 33 to guide so that stored articles may not disperse is arranged.

Description

  The present invention relates to a vehicle seat back structure.

2. Description of the Related Art Conventionally, in a vehicle seat, for the convenience of the driver, a technology is known in which a table that can be used as a luggage table (tray) or a writing table is provided on the back of a retractable seat back of a passenger seat. It has been.
For example, Japanese Patent Laid-Open No. 2000-264107 (patent document) is disclosed.
As shown in FIG. 8, in a state where the seat back 01B of the passenger seat 01 is lying on the seat cushion 01A around the hinge mechanism 017 below, the table 020 is located on the seat back rear surface 01Ba. ”And an“ extension position ”extending from the seat back 01B to the front dashboard 03 side (moving about the pivot shaft 016). The table 020 is securely supported by hooking the hook portion 023a of the support member 023 disposed at the front end of the table 020 extended to the “extension position” on the hook portion 011 of the dashboard 03. The storage recess 015 expands the storage space.

JP 2000-264107 A

However, since the cab-over type truck has a small space provided in the cab structure due to the structure of the operator's cab, the passenger seat portion is often used as a luggage placement space particularly in the cab-over type truck for collection and delivery.
As shown in FIG. 8, the seat back 01B is laid down on the seat cushion 01 or the back of the seat back 01Ba is used as a loading table.
However, with the improvement of collection and delivery services, it is desired to expand the space where many items such as various devices (for example, personal computers instructing the order for collection and delivery efficiency), maps and lunch boxes can be placed around the driver. However, I was not able to meet that demand.
Accordingly, the present invention has been made in view of such problems, and an object thereof is to increase the space in which luggage can be placed around the driver's seat of a cab overtrack and to improve the convenience of the vehicle.

The present invention achieves such an object, and in a seat back structure of a passenger seat mounted on a vehicle, a hinge portion disposed at a lower end portion of the seat back and capable of rotating in the vehicle front-rear direction,
The seat back is divided into two in the front-rear direction, and is composed of a first seat back in the front part and a second seat back in the rear part, and the first seat back can be tilted forward about the hinge part. An annular ridge is provided along the outer peripheral portion on the back side, and a first recess is formed in the center so that it can be used as a tray. The second seat back projects the center toward the rear side of the vehicle. The second concave portion is formed, a part of the second concave portion is closed, and a guide member that guides the stored items from being scattered is provided.

  In this invention, the seat back is divided into two in the front-rear direction, the front side is laid down, the back side of the seat back is used as a tray, and the rear seat back is used as a storage case. This has the effect of facilitating storage and improving the convenience of the vehicle.

  Preferably, in the present invention, a skin material disposed on a front surface side of the first seat back, a first engagement portion disposed on an edge of the skin material, and a back surface of the first seat back An annular insertion groove into which the skin material and the first engagement portion are inserted in the outer peripheral edge portion on the side, and the first engagement portion in a portion facing the first engagement portion in the insertion groove It is good to provide the 2nd engaging part engaged with.

With such a configuration, the edge of the skin cloth material is inserted into the insertion groove, so that the edge of the skin cloth material is hidden and the appearance is improved.
In addition, since the structure is such that the edge of the skin material and the first seat back are engaged with each other by the engaging portion, the skin material is not loosened, and the appearance when the first seat back is raised is good. .

  In the present invention, it is preferable that the guide member is formed in a belt shape that opens in a lower portion of the second recess and extends in the vehicle width direction.

  By adopting such a configuration, the lower part of the guide member is left open, so that it is easy to take out when a writing instrument or the like falls on the lower bottom of the first recess.

  Preferably, in the invention of the present application, the hinge portion side of the annular ridge portion of the first seat back is higher in height from the surface of the tray than the other ridge portions, and the inner peripheral surface of the ridge portion. The second ridges serving as shelves formed substantially at right angles to the surface of the tray and the second seat back accommodate the shelves when the first seat back is raised. It is preferable that the second recess is formed as described above.

  With such a configuration, even if the first seat back is erected in a state where a binder or a map is placed on the tray portion, the hinge portion is centered in a state where it is placed on the shelf portion. Therefore, the binder or the map is prevented from falling and being pinched by the hinge portion.

  Preferably, in the present invention, the hinge portion is formed integrally with either the first seat back or the second seat back formed of a soft resin material, and a part of the circumference is an axis. A bearing portion that is missing over the entire area, and a shaft portion that is formed integrally with one of the other and has a half-moon shaped cross section, and the shaft portion is pivotally attached to the bearing portion through the lack portion, When the first seat back is in a standing state, the diameter portion of the shaft portion may block the missing portion so that the shaft portion does not come off from the bearing portion.

  By adopting such a configuration, the hinge portion is formed of a soft resin material without using metal parts for the hinge portion. Therefore, when the first seat back is used as a tray, With respect to the impact, the bearing portion is expanded and detached or destroyed, thereby having an effect of reducing damage to the passenger.

  According to the present invention, the seat back is divided into two in the front-rear direction, and is rotated (tilted) to the front side so that the back side of the seat back serves as a tray and the rear seat back serves as a container. In addition, the use or storage of a map or the like is facilitated and the convenience of the vehicle is improved.

These show the perspective view of the state which closed the center sheet | seat concerning embodiment of this invention. These show the perspective view of the state which opens the center sheet | seat concerning embodiment of this invention, and uses it as a storage stand. (A) is AA sectional drawing of FIG. 2, (B) is the E section enlarged detail drawing of (A), (C) shows the engaging part structure of a skin material edge. Fig. 2 shows a partially enlarged detail view of the BB cross-sectional view of Fig. 2. Fig. 2 shows a partially enlarged detail view of the CC cross-sectional view of Fig. 2. (A) is DD sectional drawing of FIG. 1, (B) shows the F section enlarged detail drawing of FIG. 6 (A). These are the detailed shape figures of a hinge part, (A) shows the 1st seat back side, (B) shows the 2nd seat back side. Indicates the prior art.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to specific examples unless otherwise specifically described. Only.

FIG. 1 is an external perspective view of a passenger seat 1 in the present embodiment. The passenger seat 1 is a side seat back 2 that serves as a backrest for a person seated on the window side of the passenger seat, and a person seated on the vehicle center side. A center seat back 3 that serves as a backrest and a seat 5 that is a seating portion on which an assistant sits.
Reference numeral 6 denotes a seat hinge portion for adjusting the inclination of the side seat back 2 and the center seat back 3.
FIG. 2 divides the center seat back 3 into two in the vehicle front-rear direction (hereinafter, described with reference to the state of sitting in the driver's seat in the front-rear direction, the left-right direction, and the upper-lower direction). The second seat back 32, which is the rear side portion, is maintained upright together with the side seat back 2.

FIG. 3A shows a cross section taken along the line AA in FIG. The first seat back 31 is hinged to the tray hinge portion 37 at the lower end portion of the second seat back 32 so that the seat 5 can lie down or stand up, and the lying back side can be used as a tray. The side faces the sheet 5.
The first seat back 31 includes a first seat back main body 34 made of a soft resin (PP, PE, or the like is used as a material) in which a tray concave portion 341 that is a first concave portion is formed at the center with respect to an outer peripheral portion. A woven fabric skin material 36 attached to the surface side of the first seat back main body 34, a lock mechanism 4 on the upper end side (see FIG. 4), and a hinge portion B on the lower end side (see FIG. 7B). ].
The tray concave portion 341 has a rectangular cross section (projection height: H2) that protrudes from the front surface side to the back surface side of the first seat back body 34 inside the outer peripheral portion, and is formed in an annular shape along the outer peripheral portion. It is formed by a first ridge portion 342 that is an annular ridge portion.
The second ridge portion 343 [see FIG. 3 (A)] in which the projection height H1 from the front surface side to the back surface side is higher (H1> H2) than the other portion on the tray hinge portion 37 side of the first ridge portion 342. ].
Even if the second ridge portion 343 is stood up with the binder used during collection and delivery placed on the tray, the second ridge portion 343 acts as a shelf to prevent the binder from falling, and the hinge portion 37 It is prevented from being pinched by.

FIG. 3B shows an enlarged detail view of the E part in FIG. 3A, and a woven fabric skin material 36 is attached to the surface side of the first seat back 31. The covering structure of the skin material 36 includes an engaging protrusion 347 disposed on the inner side of the outer peripheral edge of the first seat back main body 34 and protruding toward the tray recess 341 side, and the skin material 36 shown in FIG. An engagement member 361 formed of a strip-shaped resin material sewn on the edge, and is positioned between the engagement protrusion 347 and the first protrusion 342, and a gap α between the engagement protrusion 347 is defined as the skin material 36. And an annular insertion groove formed by a pressing portion 344 that is arranged in a ring shape along the outer peripheral edge and presses the skin material 36 outward, slightly narrower than the sum of the thicknesses of the engagement members 361. 345.
Then, the skin material 36 inserts the edge of the skin material 36 and the engaging member 361 into the insertion groove 345 having the gap α while pulling the skin material 36 (the fabric is slightly stretched). The first seat back main body 34 can be covered in a state where the skin material 36 is stretched by engaging the combining member 361 with the engaging protrusion 347.
Further, since the pressing portion 344 presses the skin material 36 and the engaging member 361 outward, the engagement between the engaging member 361 and the engaging protrusion 347 is not easily released.

The second seat back 32 includes a hinge portion A (see FIG. 7A) that is hinged to the first seat back 31 disposed at the lower end portion, and an engagement hole 351 that engages the first seat back 31 with the upper end portion. And a container recess 355 which is a second recess whose middle portion protrudes rearward, and an object inserted into the container recess 355 for storage does not fall on the opening edge of the container recess 355 at the intermediate portion in the vertical direction of the container recess 355. And a strip-shaped guide member 33 extending in the left-right direction.
In addition, when the second seat back 32 is in a vehicle-mounted state, the bottom portion 356 of the container recess 355 has a surface inclined rearward and downward, and when the vehicle is braked, an insert (such as a map book) is stored in the container recess. 355 is prevented from moving forward.
Further, a gap β (see FIG. 3A) is provided between the lower end edge of the guide member 33 and the bottom portion 356 of the container recess 355.
As a result, even if the writing tool or the like falls on the bottom portion 356 of the storage compartment recess 355, the vehicle is prevented from falling into the vehicle when the brake is applied (the surface inclined downward from the bottom portion 356), and the writing tool or the like is removed from the gap portion. It can be easily taken from the β portion.

4 is a cross-sectional view taken along the line B-B of FIG. 2, showing an enlarged detail view of the lock mechanism 4 that raises the first seat back 31 and engages the second seat back 32. The attached portion 346 disposed on the outer peripheral side of the first ridge portion 342 at the center is formed, and the base end of the leaf spring 41 bent in a hook shape is attached to the attachment portion 346. A grip 42 having a first engagement claw 421 is attached to the distal end side of the leaf spring 41 by molding the distal end side of the leaf spring 41. When the first seat back 31 rotates around the tray hinge portion 37 and is pressed to engage with the second seat back 32, the first engagement pawl 421 is deformed by the plate spring 41 to cause the second seat. While sliding the R-shaped guide portion 353 of the back main body 35, it is fitted into the engagement hole 351 provided at the top of the second seat back main body 35 and locked.
Reference numeral 352 denotes a reinforcing flange for increasing the strength of the lock mechanism 4.
Reference numeral 11 denotes a frame that supports the side seat back 2 and the center seat back 3.

  When the first seat back 31 is laid down on the seat 5, if the grip portion 42 is pressed toward the first seat back 31, the plate spring 41 is deformed and the first engagement claw 421 is disengaged from the engagement hole 351. Thus, the lock mechanism 4 is released.

FIG. 5 shows an enlarged detail of the CC cross section of FIG. 2, and the same portions are arranged on the left and right sides of the lock mechanism 4.
An elastic member (made of a synthetic rubber or the like is used as a material) 43 made of a resin member is disposed above the second seat back body 35 at a position facing the first ridges 342 of the first seat back body 34. Thus, when the first seat back 31 is engaged by the lock mechanism 4, the first seat back 31 is pressed to prevent rattling of the first seat back 31 due to vehicle vibration.
The elastic member 43 includes a contact protrusion 431 that contacts the first protrusion 342 and an engagement recess 433 that engages with the insertion hole 352 of the second seat back body 35.
In the mounting method, the engaging recess 433 is press-fitted (deformed) into the insertion hole 352 to be engaged.

FIG. 6A is a cross-sectional view taken along the line DD in FIG. 1 and shows a state in which the container recess 355 of the second seat back 32 is closed by the first seat back 31.
The first ridge portion 342 of the first seat back body 34 and the outer peripheral portion of the second seat back body 35 are in contact with each other over substantially the entire circumference, and articles in the container recess 355 and the tray recess 341 It is designed not to jump into the passenger compartment.

  FIG. 6B is an enlarged detail view of the F portion of FIG. 6, and the guide member 33 has a second engagement claw 331 having a protruding portion 332 formed at a lateral end edge and a second seat back main body 35. The guide member 33 is attached to the second seat back main body 35 by being fitted into a third engagement hole 355 formed in the attachment portion 358 disposed on the outer periphery of the second seat back body 35.

FIG. 7A shows a hinge portion A made of a soft resin (PP, PE, or the like is used as a material) that constitutes a tray hinge portion 37 integrally formed at the lower portion of the second seat back main body 35. The hinge portion A has first arm portions 371 and 371 extending from the lower portion of the second seat back body 35 with a gap γ, and a radial cross section perpendicular to the axis L2 between the first arm portions 371 and 371. A pin 372, which is a shaft portion made of a soft resin (PP, PE, or the like is used as a material) formed at a half-moon-like height H <b> 3, is fixed to the tip portions of the first arm portions 371 and 371.
FIG. 7B shows a hinge which is a bearing portion made of a soft resin (material is PP, PE, etc.) which is integrally formed at the lower end of the first seat back body 34 and constitutes the tray hinge portion 37. Part B. The hinge part B includes a second arm part 375 extending from the lower part of the first seat back body 34 and having a width slightly narrower than the interval γ, and a bearing part 377 that pivotally supports the pin 372 at the tip of the second arm part 375. And an opening 376 communicating with the bearing portion 377.
Further, a connecting portion 378 that is a lacking portion that connects the bearing portion 377 and the opening 376 is formed. The connecting portion 378 is slightly wider than the height H of the pin 372 and narrower than the diameter of the pin 372, and is lacking over the entire width of the hinge portion B along the axis L 1 of the bearing portion 377.

The tray hinge portion 37 is assembled by moving the second seat back body 35 in the direction of the arrow K in the state shown in FIG. 7 so that the half-moon height H of the pin 372 is the connecting portion. The pin 372 is pivotally supported by the bearing portion 377 by moving in the direction of the arrow L so as to face 378.
After the shaft is supported, by rotating any of the seat backs, the connecting portion 378 is closed by the diameter of the pin 372, and the engagement is not released.
In this embodiment, since the hinge portion is formed of a soft resin material, the tray hinge portion 37 is deformed when a strong force is applied from the front when the first seat back 31 is laid down on the seat 5. The engagement is disengaged or the tray hinge portion 37 is broken to minimize the damage to the crew.

According to the present embodiment, the center seat back 3 close to the driver's seat is divided into two in the front-rear direction so that the first seat back 31 can be used as a tray and the second seat back 32 can be used as a storage case. The mounting space becomes large, and particularly when used as a collection and delivery vehicle, it is easy to use or store a personal computer for collection and delivery, a map, etc., and the convenience of the vehicle is improved.
Further, since the end edge of the skin material 36 is inserted into the insertion groove 345, the end edge of the skin material 36 is hidden and the appearance is improved.
Further, since the end portion of the skin material 36 and the first seat back are engaged by the engaging portion, the cloth material for the skin does not loosen, and the appearance when the first seat back is raised is good.

  The present invention can be applied to a seat back of a seat arranged as a passenger seat on a cab over type truck.

DESCRIPTION OF SYMBOLS 1 Passenger seat 2 Side seat back 3 Center seat back 5 Seat 31 1st seat back 32 2nd seat back 33 Guide member 34 1st seat back main body 35 2nd seat back main body 36 Skin material 37 Tray hinge part 331 2nd engagement Joint claw 341 Tray recess (first recess)
342 First ridge (annular ridge)
343 Second ridge (shelf)
344 Pressing part 345 Insertion groove 347 Engagement protrusion 355 Storage recess (second recess)
356 Bottom 361 Engagement member (engagement part)
421 First engaging claw

Claims (5)

In the seat back structure of the passenger seat mounted on the vehicle,
A hinge portion disposed at a lower end portion of the seat back and rotatable in a vehicle front-rear direction;
The seat back is divided into two in the front-rear direction, and is composed of a first seat back in the front part and a second seat back in the rear part, and the first seat back can be tilted forward about the hinge part. An annular ridge is provided along the outer peripheral portion on the back side, and a first recess is formed in the center so that it can be used as a tray. The second seat back projects the center toward the rear side of the vehicle. A seat back structure comprising a guide member that forms a second recess, closes a part of the second recess, and guides the stored items so as not to scatter. A skin material disposed on the front side of the first seat back;
A first engagement portion disposed on an edge of the skin material;
An annular insertion groove into which the skin material and the first engagement portion are inserted in the outer peripheral edge portion on the back side of the first seat back;
The seat back structure according to claim 1, further comprising a second engaging portion that engages with the first engaging portion at a portion facing the first engaging portion in the insertion groove.   2. The seat back structure according to claim 1, wherein the guide member is formed in a belt shape that opens in a lower portion of the second recess and extends in a vehicle width direction. The hinge portion side of the annular ridge portion of the first seat back has a height from the surface of the tray higher than the other ridge portions, and the inner peripheral surface of the ridge portion is substantially the surface of the tray. A second ridge that becomes a shelf formed at a right angle;
2. The seat back according to claim 1, wherein the second recess is formed in the second seat back so that the shelf is accommodated when the first seat back is erected. 3. Construction.   The hinge portion is formed integrally with either the first seat back or the second seat back formed of a soft resin material, and a part of the circumference is missing over the entire area along the axis. A bearing portion and a shaft portion formed integrally with one of the other and having a half-moon shaped cross section, the shaft portion being pivotally attached to the bearing portion via the lacking portion, and when the first seat back is in a standing state The seat back structure according to claim 1, wherein a diameter portion of the shaft portion closes the missing portion so that the shaft portion does not come off from the bearing portion.

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