JP2006081603A - Rear seat cushion for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rear seat cushion for the automobiles which can secure the required rigidity and heat resistance while preventing the generation of the noises even with an inexpensive structure. <P>SOLUTION: The cushion has a body 2 with a shape of a bench that lets a plurality of crews sit side by side and a reinforcing member 4 which is securely fitted into a fitting recessed part 3 hollowed upward from the undersurface of the body 2 of the cushion. The reinforcing member 4 is made of a pulp and is so formed as to arrange a plurality of top recessed parts 9 hollowed downward from the top surface of the cushion body contacting the fitting recessed part 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rear seat cushion in the form of a bench in which two to three passengers in an automobile can sit side by side.

  Inside the automobile, a front seat in the form of a bucket independent of each occupant and a back seat in the form of a bench on which 2 to 3 occupants can sit side by side are installed as shown in FIG. The cushion 30 of the rear seat is formed of urethane foam as a material for the purpose of ensuring required cushioning properties. However, the cushion 30 for the rear seat has a very large thickness due to its layout. If the entire cushion 30 is made of urethane foam, the rigidity becomes insufficient and easily deforms and loses its shape. As a result, the seating comfort is deteriorated, and in particular, a child seat that is required to be attached in recent years falls down.

  Therefore, in the conventional rear seat cushion 30, a fitting recess 32 extending in the longitudinal direction of the cushion main body 31 is formed at the bottom of the cushion main body 31 formed of urethane foam, and the fitting recess 32 is formed. It is set as the structure which inserted the reinforcing material 33 in the downward direction. As a result, the rear seat cushion 30 is improved in rigidity due to the lack of strength of the cushion main body 31 made of urethane foam being compensated by the reinforcing material 33. The reinforcing material 33 is often made of foamed polystyrene, hard synthetic resin, lightweight metal, or the like.

  By the way, in the rear seat cushion 30 having the above-described configuration, the cushion main body 31 and the reinforcing member 33 are rubbed against each other under the influence of vibration during driving of the automobile, and noise that makes the passenger feel uncomfortable is generated. There is a bug to do. In addition, the rear seat cushion 30 is often provided at a location above the exhaust pipe of an automobile, so that the exhaust heat released from the exhaust pipe is transferred to heat, but in particular, foaming made of polystyrene beads. In the case of using the reinforcing material 33 as a molded product, since the heat resistance of the reinforcing material 33 is low, there is a problem that the reinforcing material 33 deteriorates early.

  As a measure for solving such a problem, a configuration as shown in FIG. 8, which is a cross-sectional view taken along the line BB of FIG. 7, is conventionally used. That is, conventionally, the cushion body 31 and the reinforcing member 33 are mutually fitted by interposing the cloth-like cushioning member 34 between the fitting recess 32 and the reinforcing member 33 of the cushion body 31. The noise generated when rubbing against each other is prevented. Further, in the case of using a foam molded article reinforcing material 33 made of polystyrene beads, by applying a felt plate 37 to the bottom surface of the reinforcing material 33 to improve heat resistance, the reinforcing material 33 can be improved at an early stage. It tries to prevent deterioration.

  However, since the cushion 30 for the rear seat requires the cushioning member 34 and the felt plate 37 as separate members, the number of parts increases and the number of assembly steps increases, and the cost increases accordingly. Further, the reinforcing material 33 made of hard synthetic resin or light metal increases the manufacturing cost because the production cost of the molding die is high. Furthermore, the reinforcing material 33 made of a lightweight metal has an advantage that it is superior to other materials in terms of rigidity and heat resistance, but has a disadvantage that the weight is increased.

  The present invention has been made in view of the above-described conventional problems, and provides an automobile rear seat cushion capable of preventing noise from being generated and obtaining required rigidity and heat resistance while having an inexpensive configuration. It is intended.

  In order to achieve the above object, a rear seat cushion of an automobile according to the first aspect of the present invention includes a cushion body having a bench shape in which a plurality of occupants can sit side by side, and a concave shape upward from the lower surface of the cushion body. A plurality of upper surface recesses that are recessed downward from the upper surface that contacts the fitting recess, using the pulp as a raw material. It is characterized by being formed into a shape.

  According to a second aspect of the present invention, the reinforcing member in the rear seat cushion of the first aspect of the present invention includes a reinforcing member for mutually connecting two adjacent lower surface convex portions of the lower surface convex portion on the lower surface side of the upper surface concave portion. The rib is integrally formed.

  According to a third aspect of the present invention, the upper surface concave portion of the reinforcing member in the rear seat cushion of the automobile according to the first or second aspect is formed in a widened shape in which the cross-sectional area of the upper end opening is larger than the bottom portion.

  According to a fourth aspect of the present invention, the reinforcing material in the rear seat cushion of any one of the first to third aspects of the present invention is such that the fiber is separated by chemically steaming the used paper, such as washing and beating. After passing through the process, it is produced through a pulp mold production process in which a plate-like paper-forming material is formed by a paper-making process by a paper machine, and the forming material is press-molded.

  In the invention of claim 1, since the reinforcing material has a plurality of upper surface recesses, the contact area of the reinforcing material to the fitting recess is reduced as compared with the existing one. When friction with the mating recess is reduced and the friction coefficient of the reinforcing material made of pulp is large, so that it receives vibration during driving without using a conventional cushioning member. Noise generation is extremely low. Moreover, since the reinforcing material is formed from pulp having excellent heat resistance, a conventional felt plate is not required. Therefore, according to the present invention, the number of parts and the number of assembly steps are both reduced, so that the cost can be reduced. In addition, since the reinforcing material has an uneven shape having a concave portion on the upper surface, it has been improved in strength, and it is almost the same as a conventional reinforcing material despite being formed from pulp. It has the same rigidity and does not cause an increase in weight. Furthermore, since the reinforcing material is made of pulp, there is an advantage that it is extremely recyclable.

  In the invention of claim 2, since the strength of the reinforcing material is improved by the reinforcing rib, the reinforcing material can be further improved in rigidity.

  In the invention of claim 3, for example, when transporting from a manufacturer of a reinforcing material to an automobile assembly plant or the like, a plurality of lower surface protrusions are fitted into the upper surface recess of the lower position reinforcing material from above. By stacking up and down in the vertical direction, it is possible to stack very low in volume, so that transportation costs can be reduced.

  In the invention of claim 4, unlike conventional reinforcing materials manufactured through molding using a molding die, it can be manufactured through a pulp mold production process, so that a reinforcing material of a required shape can be manufactured at low cost. Can do.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a rear seat cushion 1 of an automobile according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. The rear seat cushion 1 includes a urethane foam cushion body 2 having a fitting recess 3 similar to the existing one formed at the bottom, and a reinforcing member 4 fitted into the fitting recess 3. Configured. The reinforcing material 4 is a pulp mold product formed in a shell form using pulp as a raw material. Moreover, in this embodiment, the pulp made from what is called used paper, such as an old newspaper, a corrugated cardboard, a magazine, can be utilized without trouble, for example as the raw material of the reinforcing material 4.

  FIG. 3 is a perspective view showing the reinforcing material 4, and the reinforcing material 4 will be described in detail with reference to FIGS. The reinforcing member 4 has a top surface corresponding to the fitting recess 3 of the cushion body 2, and a pair of fastening portions 7 and 8 projecting in the vertical direction are integrally formed at both ends in the longitudinal direction. In addition, a plurality of upper surface recesses 9 having a substantially rectangular shape in plan view and recessed downward are parallel to each other (six in this embodiment). In the case of FIG. Further, the reinforcing material 4 has a shape in which the entire lower surface corresponds to the entire upper surface with a constant thickness, in other words, a shape similar to a shape in which unevenness is provided by pressing a plate member having a predetermined thickness. Yes. Therefore, the lower surface side corresponding to the upper surface concave portion 9 is the lower surface convex portion 10, and the lower surface side of both the fastening portions 7 and 8 is the lower surface space 11. Such a shape can be easily formed because the reinforcing material 4 is manufactured through a well-known pulp mold production process using pulp as a raw material. Needless to say, the fitting recess 3 of the cushion main body 2 has a shape corresponding to the outer shape of the upper surface of the reinforcing member 4.

  The rear seat cushion 1 of this embodiment is configured by fitting the reinforcing material 4 into the fitting recess 3 of the cushion body 2 in a press-fitted state. The fitted reinforcing material 4 is a plate-like material. It is fitted into the fitting recess 3 in a close contact state by a restoring force equivalent to the restoring force due to the elasticity obtained by pressing and forming the irregularities, and the longitudinal direction by the fastening portions 7 and 8 at both ends. Is prevented from moving to be integrated with the cushion body 2.

  In the rear seat cushion 1 having the above-described configuration, since the reinforcing member 4 has a plurality of upper surface recesses 9, the contact area of the reinforcing member 4 with the fitting recess 3 is smaller than that of the existing one. Accordingly, the frictional points between the reinforcing member 4 and the fitting recess 3 are reduced. In addition, since the reinforcing material 4 is made of pulp, the friction coefficient is increased. For this reason, in the rear seat cushion 1, noise is generated when the vehicle is subjected to vibrations when the vehicle is driven without a conventional buffer member 34 interposed between the fitting recess 3 and the reinforcing member 4. Is extremely low. Further, since the reinforcing material 4 is formed from a pulp having excellent heat resistance, the felt plate 37 as in the related art is not required. Therefore, the cushion 1 for the rear seat reduces both the number of parts and the number of assembling steps, and can reduce the cost considerably in addition to the ability to manufacture the reinforcing material 4 using pulp made from waste paper. it can.

  Further, since the reinforcing material 4 has an uneven shape having the upper surface concave portion 9, the lower surface convex portion 10, the lower surface space 11, etc., the strength is improved by this uneven shape, so that the pulp mold using pulp as a raw material Despite being a molded product, it is possible to have almost the same rigidity as a conventional reinforcing material made of expanded polystyrene, hard synthetic resin, lightweight metal or the like.

  Furthermore, since the reinforcing member 4 has a shape such as unevenness on the plate member, the amount of forming material can be reduced by that amount, so that it is almost the same as a conventional foam molded product made of polystyrene beads. Although the weight can be reduced to a certain level, the weight does not increase even though pulp is used as a raw material.

  Moreover, since the reinforcing material 4 has a shape in which a single plate member is uneven, each upper surface recess 9 is formed in an enlarged shape in which the cross-sectional area of the upper end opening is larger than the bottom. As shown in FIG. 4, when transporting from the manufacturer of the reinforcing material 4 to an automobile assembly plant or the like, a plurality of lower surface convex portions 10 at the upper position are fitted into the upper surface recess 9 of the reinforcing material 4 at the lower position from above. By stacking the numbers in the vertical direction, it is possible to stack very low in volume, which has the advantage of reducing transportation costs. Further, since the reinforcing material 4 is made of pulp, it is extremely excellent in recyclability, and from this point, the cost can be reduced.

  Moreover, the said reinforcement material 4 can be manufactured through a well-known pulp mold production process. That is, the above-mentioned various used papers collected as materials are chemically cooked to separate the fiber, and after steps such as washing and beating, a plate-like paper-forming material is formed by a paper-making process using a paper machine Furthermore, the reinforcing material 4 having the above-described shape can be easily manufactured by subjecting this forming material to press molding. This manufacturing means, unlike conventional reinforcing materials manufactured through a molding process using a molding die, can be manufactured without using a molding die, so that the reinforcing material 4 having a required shape can be manufactured at a low cost. can do.

  FIG. 5 is a perspective view of a half portion seen from above showing a reinforcing member 12 in an automobile rear seat cushion according to another embodiment of the present invention, and FIG. 6 is a half portion seen from below showing the reinforcing member 12. FIG. The reinforcing material 12 includes a fastening portion 7 that is substantially the same as the reinforcing material 4 in the embodiment, a plurality of upper surface concave portions 9, a lower surface convex portion 10, and a lower surface space 11, and in addition, on the lower surface, Reinforcing ribs 13 for connecting two adjacent lower surface convex portions 10 to each other are integrally formed.

  The rear seat cushion using the reinforcing member 12 can obtain the same effects as described in the embodiment, and in addition, the strength of the reinforcing member 12 is improved by the reinforcing ribs 13, so that the rigidity is increased. There is an advantage that the reinforcing material 4 can be further improved. However, when transporting, the bulk in the vertical direction when the plurality of reinforcing members 12 are stacked is slightly higher than that of the embodiment.

  The cushion for a rear seat of an automobile according to the present invention prevents the generation of noise without using a cushioning member or a felt plate only by forming the reinforcing material into a shape made of pulp and having a plurality of recesses on the upper surface. Therefore, the required rigidity and heat resistance can be obtained, so that the number of parts and the number of assembling steps can be reduced and the product can be manufactured at low cost, and a product that can obtain a suitable sitting comfort can be provided at low cost.

The perspective view which shows the cushion for the back seats of the motor vehicle which concerns on one embodiment of this invention. AA sectional view taken on the line AA of FIG. The perspective view which shows the reinforcing material in the cushion for rear seats same as the above. Sectional drawing of the state which piled up two reinforcing materials same as the above up and down. The perspective view of the half part seen from the upper part which shows the reinforcement material in the motor vehicle cushion which concerns on other embodiment of this invention. The perspective view of the half part seen from the lower part which shows a reinforcing material same as the above. The perspective view which shows the cushion for the back seats of the conventional motor vehicle. BB sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cushion for back seats 2 Cushion main body 3 Fitting recess 4 Reinforcement material 9 Upper surface recessed part 10 Lower surface convex part 12 Reinforcement material

Claims (4)

Cushion body in the form of a bench where multiple passengers can sit side by side,
A reinforcing material fitted and fixed in a fitting recess recessed upward from the lower surface of the cushion body,
The cushion for a rear seat of an automobile, wherein the reinforcing material is made of pulp and is formed in a shape in which a plurality of upper surface recesses recessed downward from an upper surface contacting the fitting recess. .   The cushion for the back seat of the automobile according to claim 1, wherein the reinforcing member is integrally formed with a reinforcing rib for mutually connecting the two adjacent lower surface convex portions of the lower surface convex portion on the lower surface side of the upper surface concave portion. .   The cushion for the back seat of the automobile according to claim 1 or 2, wherein the upper surface recess of the reinforcing material is formed in an enlarged shape in which the cross-sectional area of the upper end opening is larger than that of the bottom.   The reinforcing material is obtained by chemically steaming used paper, separating the fibers, passing through processes such as washing and beating, and then forming a plate-like paper-forming material by a paper-making process using a paper machine. The cushion for the back seat of the automobile according to any one of claims 1 to 3, wherein the cushion is manufactured through a pulp mold production process in which press molding is performed.

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