JP5970310B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a seat (seat) mounted on a vehicle, and more particularly to a seat suitable for an all-weather seat for use in a working vehicle such as an agricultural machine or a construction machine and corresponding to a use environment that is easily exposed to wind and rain.

For example, in the all-weather vehicle seat of Patent Document 1, a cushion material made of urethane resin is foam-molded on the inner surface of the skin, so that the skin and the cushion material are in close contact with each other and integrated.
In the skin-integrated foam sheet as described above, the cushion material of the seat cushion and the cushion material of the seat back are integrally connected in an L shape in a side view, and the skin of the seat cushion and the skin of the seat back are L in a side view. An L-shaped skin-integrated foam sheet that is continuous in a letter shape is also known.

JP-A-9-123806

  In the L-shaped skin-integrated foam sheet, a tensile force (stress) is applied to the skin every time the cushion material is bent and deformed by a dynamic load such as passenger getting on and off or vibration during work. For example, when the cushion material of the seat cushion is compressed and deformed, the skin of the seat back is pulled toward the seat cushion. By frequently receiving a dynamic load with such a pulling force, the adhesion between the skin and the cushion material is broken, and the skin is easily peeled off from the cushion material. If it does so, an outer skin will float from a cushion material, and the external appearance of a sheet will be spoiled.

In order to solve the above problems, the present invention includes a frame, a cushion material supported by the frame, and a skin covering the cushion material, and the cushion material is foam-molded on the inner surface of the skin. A vehicle seat, wherein the skin includes a seat skin portion of a seat cushion, a back skin portion of a seat back, and an intermediate skin portion, and the intermediate skin portion includes the seat skin portion and the back skin. The seat skin portion and the back skin portion are connected to each other, and the cushion material is foamed on the inner surface of the seat skin portion and foamed on the inner surface of the back skin portion. The seat cushion material and the back cushion material are separated from each other, and the intermediate skin portion is formed of the seat cushion. Characterized in that it is arranged in a slack between the emission material and the back cushion material.
According to this characteristic configuration, even if the seat cushion material is repeatedly bent and deformed by a dynamic load such as passenger getting on and off or vibration during work, the seat cushion material and the back cushion material are separated, and the intermediate skin portion is loosened. Therefore, the back skin portion can be prevented from being pulled toward the seat cushion. Therefore, it can suppress or prevent that a back skin part peels from a back cushion material. As a result, it is possible to suppress or prevent the epidermis from floating from the cushion material. As a result, the shape of the skin can be reliably held in a predetermined shape, and the external shape of the sheet can be maintained for a long period of time.

Furthermore, it is preferable that the vehicle seat includes a cover member disposed between the seat cushion and the seat back so as to cover the intermediate skin portion.
Thereby, the appearance of the vehicle seat can be shown as if it is a separate type seat.

It is preferable that the intermediate skin portion is sandwiched between the cover member and the frame.
Accordingly, even if a tensile force acts on the seat skin portion, it is possible to reliably prevent the tensile force from being transmitted to the back skin portion. Therefore, it is possible to more reliably suppress or prevent the back skin portion from being peeled off from the back cushion material, and it is possible to reliably hold the shape of the skin in a predetermined shape. Moreover, waterproofness can further be improved.

  According to the present invention, even if the cushion material is repeatedly deformed due to a dynamic load such as passenger getting on and off or vibration during work, the skin can be prevented or suppressed from peeling off from the cushion material, and the skin can be lifted from the cushion material. Can be prevented or suppressed. As a result, the external shape of the sheet can be maintained for a long time.

FIG. 1 shows a first embodiment of the present invention and is a perspective view of a vehicle seat. FIG. 2 is a perspective view of the frame of the vehicle seat. FIG. 3 is a longitudinal cross-sectional view of the vehicle seat cut at the left and right (vehicle width direction) central portions. FIG. 4 is a cross-sectional view of a continuous portion of the seat cushion and the seat back of the vehicle seat. FIG. 5 is a longitudinal sectional view of the continuous portion taken along line VV in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a vehicle seat 10 according to the present embodiment. The vehicle seat 10 is mounted on a work vehicle such as an agricultural machine or a construction machine. Examples of agricultural machines include tractors and combine harvesters. Examples of construction machines include power shovels and forklifts. This type of work vehicle seat is easily exposed to wind and rain. The vehicle seat 10 is a so-called all-weather seat corresponding to such a use environment.

  As shown in FIG. 3, the vehicle seat 10 includes a frame 20, a pad assembly 3, and a cover member 50. The frame 20 is made of resin, but is not limited thereto, and may be made of metal. As shown in FIG. 2, the frame 20 integrally includes a seat frame portion 21 and a back frame portion 22. The seat frame portion 21 is disposed substantially horizontally. The back frame portion 22 is disposed such that the upper end portion is slightly inclined backward with respect to the vertical, and intersects the seat frame portion 21. The rear end portion of the seat frame portion 21 and the lower end portion of the back frame portion 22 are integrally connected. Ribs 24 are provided vertically and horizontally on the inner surface of the frame 20 (the upper surface of the seat frame portion 21 and the front surface of the back frame portion 22). Further, a drain hole 21c is formed in the seat frame portion 21.

  As shown in FIGS. 2 and 4, a plurality of receiving seats 25 and 26 are integrally provided in a continuous portion 23 of the seat frame portion 21 and the back frame portion 22 in the frame 20. These receiving seats 25 and 26 are arranged apart from each other in the left-right direction (vehicle width direction). A pair of receiving seats 25 is provided at a portion closer to the center than the left and right edges of the frame 20. Each receiving seat 25 is formed in a deformed cylindrical shape whose upper surface is closed and whose lower surface is opened. An insertion hole 25 a is formed in the upper surface portion of the receiving seat 25. The insertion hole 25a penetrates the upper surface portion of the receiving seat 25 in the thickness direction. As shown in FIG. 2, the left and right edges of the continuous portion 23 of the frame 20 are respectively recessed portions, and the recessed portions constitute the receiving seats 26. Each receiving seat 26 is formed with an insertion hole 26a. The insertion hole 26a penetrates the receiving seat 26 in the thickness direction.

  As shown in FIG. 3, the pad assembly 3 includes a cushion material and a skin 40. The cushion material is separated into a seat cushion material 31 and a back cushion material 32 which are separate from each other. The cushion materials 31 and 32 are both made of urethane foam resin, and each has a predetermined pad shape.

  The seat cushion material 31 is installed on the upper portion of the seat frame portion 21. The back cushion material 32 is installed at the front portion of the back frame portion 22. The rear end portion of the seat cushion material 31 and the lower end portion of the back cushion material 32 are separated from each other. A cushion-to-cushion gap 33 is formed between the two cushion materials 31 and 32. The inter-cushion gap 33 is disposed in the continuous portion 23 of the frame 20.

  The skin 40 is composed of a laminate including a resin layer such as polyvinyl chloride (PVC) and a back base fabric, but the material of the skin 40 is not limited to this. As shown in FIGS. 1 and 3, the skin 40 integrally includes a seat skin part 41, a back skin part 42, and an intermediate skin part 43. An intermediate skin portion 43 is interposed between the seat skin portion 41 and the back skin portion 42. The seat skin portion 41 and the back skin portion 42 are integrally connected via the intermediate skin portion 43. The entire skin 40 is a single body and has a seamless structure with no seams.

  As shown in FIG. 3, the seat skin portion 41 covers the upper surface of the seat cushion material 31. A front end portion and left and right end portions of the seat skin portion 41 are fixed to the seat frame portion 21 by a seat fixing member 61. The fastening member 61 has a U-shaped cross section, and the edges of the seat skin portion 41 and the seat frame portion 21 are fitted therein. Accordingly, the seat cushion material 31 and the seat skin portion 41 are restrained and supported by the seat frame portion 21. The seat cushion 11 is configured by the seat frame portion 21, the seat cushion material 31, and the seat skin portion 41.

  The back skin portion 42 covers the front surface of the back cushion material 32. An upper end portion and left and right end portions of the back skin portion 42 are fixed to the back frame portion 22 by a back fixing member 62. The fastening member 62 has a U-shaped cross section, and the edges of the back skin portion 42 and the back frame portion 22 are fitted therein. As a result, the back cushion material 32 and the back skin portion 42 are restrained and supported by the back frame portion 22. The seat back 12 is configured by the back frame portion 22, the back cushion material 32, and the back skin portion 42.

The skin 40 and the cushion materials 31 and 32 are closely integrated. That is, the seat cushion material 31 is attached to the inner surface (lower surface) of the seat skin portion 41 so as not to be separated. In addition, the back cushion material 32 is attached to the inner surface (back surface) of the back skin portion 42 so as not to be separated. The intermediate skin portion 43 is separated from any of the cushion materials 31 and 32. That is, the cushion material is not attached to the intermediate skin portion 43.
In addition, the seat skin portion 41 side portion of the intermediate skin portion 43 may be detachably in contact with the rear end portion of the seat cushion material 31, and the back skin portion 42 side portion of the intermediate skin portion 43 is the back cushion. You may contact | connect the lower end part of the material 32 so that separation | spacing is possible.

The pad assembly 3 is manufactured as follows.
First, the flat skin 40 before shaping | molding is created by laminating | stacking a polyvinyl chloride resin layer and a back base fabric. The flat skin 40 is set in a mold, and the skin 40 is formed into a predetermined shape by vacuuming or the like.
Next, urethane resin is injected into the mold and foamed while leaving the molded skin 40 left on the molding surface of the mold. As a result, the seat cushion material 31 is foam-molded on the inner surface of the seat skin portion 41, and the seat skin portion 41 and the seat cushion material 31 are closely integrated with each other, and the back cushion material is formed on the inner surface of the back skin portion 42. 32 is foam-molded so that the back skin portion 42 and the back cushion material 32 are closely integrated. The urethane resin is not foamed on the intermediate skin portion 43.

  As shown in FIG. 3, the intermediate skin portion 43 is accommodated in the inter-cushion gap 33. And the intermediate | middle skin part 43 is loosened in the said accommodation state. That is, no or little tension is applied to the intermediate skin portion 43.

  As shown in FIG. 1, a cover member 50 is provided in the inter-cushion gap 33. The cover member 50 is made of hard resin, but is not limited to this, and may be made of metal. As shown in FIGS. 1 and 4, the cover member 50 is formed in a plate shape or a band shape (band shape) that extends in the left-right direction (vehicle width direction) and is curved in an arc shape so as to rise as it approaches both ends in the extending direction. )It has become. As shown in FIG. 4, a plurality of mounting seats 55 and 56 are integrally provided on the back surface (lower surface) of the cover member 50. These mounting seats 55 and 56 are arranged apart from each other in the longitudinal direction of the cover member 50. A pair of mounting seats 55 are provided at a portion near the center of the cover member 50 in the longitudinal direction. The mounting seat 55 and the receiving seat 25 of the frame 20 face each other. A pair of attachment seats 56 are provided at both ends of the cover member 50 in the longitudinal direction. The mounting seat 56 and the receiving seat 26 of the frame 20 face each other one to one. Each mounting seat 55, 56 is configured by a cylindrical boss projecting downward from the back surface of the cover member 50. The mounting seat 55 near the center is larger than the mounting seats 56 at both ends.

  As shown in FIG. 4, the cover member 50 is disposed in the inter-cushion gap 33 between the seat cushion 11 and the seat back 12 so as to cover the upper portion of the intermediate skin portion 43. Therefore, the intermediate skin portion 43 is sandwiched between the cover member 50 and the continuous portion 23 of the frame 20. Furthermore, the intermediate skin portion 43 is partially pressed against the frame 20 by the cover member 50 and restrained. Specifically, two portions near the center of the intermediate skin portion 43 are sandwiched between the mounting seat 55 and the receiving seat 25 corresponding to each other. The tapping screw 71 is inserted into the insertion hole 25 a of the receiving seat 25 from below the frame 20, passes through the intermediate skin portion 43, and is screwed into the mounting seat 55. As a result, the mounting seat 55 and the receiving seat 25 strongly contact the intermediate skin portion 43. Holes 43 e are formed in the two portions near the center of the intermediate skin portion 43 by penetrating the tapping screw 71. The peripheral edge portion of the through hole 43e in the intermediate skin portion 43 is liquid-tightly sealed by the attachment seat 55 and the receiving seat 25 being in close contact with each other. Similarly, the left and right end portions of the intermediate skin portion 43 are sandwiched between the mounting seat 56 and the receiving seat 26 corresponding to each other. The tapping screw 72 is inserted into the insertion hole 26 a of the receiving seat 26 from below the frame 20, passes through the intermediate skin 43, and is screwed into the mounting seat 56. As a result, the mounting seat 56 and the receiving seat 26 are in strong contact with the intermediate skin portion 43. At both ends of the intermediate skin portion 43, holes 43 f are formed through the tapping screw 72. The peripheral edge portion of the through hole 43 f in the intermediate skin portion 43 is sealed in a liquid-tight manner by the close contact between the mounting seat 56 and the receiving seat 26.

  According to the vehicle seat 10 having the above-described configuration, the cushion material 31 and the skin portion 41 of the seat cushion 11 are mainly bent and deformed every time an occupant gets on and off. Further, the seat cushion material 31 and the seat skin portion 41 are also deformed by vibration during operation. At this time, since the seat cushion material 31 and the seat skin portion 41 are deformed almost integrally, the possibility that the seat skin portion 41 is peeled off from the seat cushion material 31 is small. Furthermore, according to the vehicle seat 10, the possibility that the back skin portion 42 is peeled off from the back cushion material 32 can be reduced. More specifically, since the seat cushion material 31 and the back cushion material 32 are separated from each other, the deformation of the seat cushion material 31 can be prevented from being transmitted to the back cushion material 32, and as a result, the back skin through the back cushion material 32. Propagation to the part 42 can be prevented. Further, by loosening the intermediate skin portion 43, it is possible to prevent the deformation of the seat skin portion 41 from being transmitted to the back skin portion 42 via the intermediate skin portion 43. Therefore, for example, even if a tension acts on the seat skin portion 41 by compressing and deforming the seat cushion 11 due to the seating of the occupant, the tension can be prevented from being transmitted to the back skin portion 42. That is, even if the seat cushion 11 is compressed and deformed, the back skin portion 42 can be prevented from being pulled toward the seat cushion 11. Furthermore, by pressing the intermediate skin portion 43 with the cover member 50 and the frame 20, it is possible to reliably prevent the deformation of the seat skin portion 41 and the tension acting on the seat skin portion 41 from being transmitted to the back skin portion 42. . Thereby, even if the vehicle seat 10 continuously receives a dynamic load due to passengers getting on and off, vibration during work, and the like, the back skin portion 42 can be made difficult to peel off from the back cushion material 32. As a result, it is possible to suppress or prevent the back skin portion 42 from floating from the back cushion material 32, and the shape of the skin 40 can be maintained in a predetermined shape for a long period of time. As a result, it is possible to avoid the appearance of the vehicle seat 10 from being impaired over a long period of time.

  In the vehicle seat 10, since the seat skin portion 41 and the back skin portion 42 of the skin 40 are integrally connected via the intermediate skin portion 43, moisture such as rainwater and sweat permeates the cushion materials 31 and 32. The required waterproofness as an all weather sheet can be secured. In particular, since the entire skin 40 has a seamless structure with no seams, the waterproof property can be further enhanced. In addition, since the through holes 43e and 43f can be sealed by sandwiching the intermediate skin portion 43 between the mounting seats 55 and 56 and the receiving seats 25 and 26, moisture such as rain water and sweat can be cushioned through the through holes 43e and 43f. 31 and 32 can be prevented from being absorbed, and waterproofness can be secured.

  Furthermore, according to the vehicle seat 10, by covering the inter-cushion gap 33 with the cover member 50 and hiding the intermediate skin portion 43, the aesthetic appearance of the vehicle seat 10 can be secured. In addition, the appearance of the vehicle seat 10 can be shown as if it is a separate type seat. Further, by separating the seat cushion material 31 and the back cushion material 32, the cushion materials 31, 32 can be designed independently of each other.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the vehicle seat 10 is not limited to a seat of a work vehicle such as an agricultural machine or a construction machine, and may be applied to a seat of a general vehicle.
The cover member 50 may be omitted.
The skin 40 may not have a seamless structure.

  The present invention can be applied as a seat for construction machines, agricultural machines, forestry machines, and other work vehicles.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 11 Seat cushion 12 Seat back 20 Frame 21 Seat frame part 22 Back frame part 23 Continuous part 25, 26 Receiving seat 25a, 26a Insertion hole 3 Pad assembly 31 Seat cushion material 32 Back cushion material 33 Cushion gap 40 Skin 41 Seat skin part 42 Back skin part 43 Intermediate skin part 43e, 43f Through hole 50 Cover member 55, 56 Mounting seat 61, 62 Fastening member 71, 72 Tapping screw

Claims (3)

A vehicle seat including a frame, a cushion material supported by the frame, and a skin covering the cushion material, wherein the cushion material is integrally adhered to an inner surface of the skin;
The frame integrally includes a seat frame part, a back frame part intersecting with the seat frame part, and a continuous part connecting the rear end part of the seat frame part and the lower end part of the back frame part,
The skin has a seat skin part of a seat cushion, a back skin part of a seat back, and an intermediate skin part, and the intermediate skin part is provided between the seat skin part and the back skin part. The seat skin and back skin are connected,
The cushion member is a seat cushion member provided in an upper portion of the seat frame portions together are integrally adhered to the inner surface of the seat skin portion, with which is integrally adhered to the inner surface of the back surface skin portion It consists of a back cushion material provided at the front part of the back frame part , and the seat cushion material and the back cushion material are separated so as to form a gap between the cushions, and the gap between the cushions , Disposed on the continuous portion;
The vehicle seat, wherein the intermediate skin portion is accommodated in the gap between the cushions in a state of being slackened toward the continuous portion . The vehicle seat according to claim 1, further comprising a cover member disposed between the cushion gaps so as to cover the intermediate skin portion. The vehicle seat according to claim 2, wherein the intermediate skin portion is sandwiched between the cover member and the frame.

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