JP4896478B2 - Net sheet - Google Patents

Description

  The present invention relates to a net sheet. More specifically, the present invention relates to a net seat that elastically supports a seating load of an occupant seated on a seat by a net member stretched on a frame-shaped frame structure that forms a skeleton of the seat.

  As this type of net sheet, for example, a configuration disclosed in Patent Document 1 is known. In this disclosure, a net member is stretched on a frame structure that forms a skeleton of the seat, and a seating load of an occupant seated on the seat is elastically supported by the tension of the net member. Specifically, the net member is attached to the frame structure with an elastic pad member such as a urethane pad interposed. Accordingly, since the hard frame structure can be covered with the soft pad member, it is difficult to feel a foreign object when seated on the seat, and the seating feeling can be improved.

JP 2003-52482 A

  However, in the above-described conventional technology, vibration absorption that absorbs vibrations that are input to the seat during traveling of the vehicle and the like so as not to be transmitted to the occupant is insufficient. That is, first, since the net member that directly supports the seating load of the occupant is stretched on the frame structure, it is easy to transmit the vibration input from the frame structure to the occupant by such tension action. Yes. The pad member provided between the net member and the frame structure is expected to absorb the vibration, but the pad member is crushed by the tension of the net member, that is, the elasticity is reduced. Since it was provided as a state, good vibration absorption could not be performed.

  The present invention was created to solve the above-described problems, and the problem to be solved by the present invention is to improve the vibration absorption of the net sheet.

In order to solve the above problems, the net sheet of the present invention takes the following means.
A first invention is a net seat that elastically supports a seating load of an occupant by a net member that is stretched on a frame-shaped frame structure that forms a skeleton of the seat, and includes a pad member that serves as a cushion material, and a pad And a skin member that is stretched so as to cover the surface on which the member is seated. The pad member is provided in contact with the surface on which the net member is seated. The side frames constituting the side frames of the frame structure, respectively, and a net fixed portion which is set is extended outwardly in the lateral direction from the side frames to the outer edges of the side frames, the seat from the side frames A pad fixing wire extending toward the surface side is integrally formed. The net member is stretched with its respective left and right edge portions fixed to the respective net fixing portions by hooks set at substantially the same horizontal position as the pad fixing wire . The skin member is stretched so as to cover the pad member with the net member in a state where the end on the seating surface side is fixed to the net member. The pad member is supported and fixed at a position protruding from the side frame to the seating surface side by the pad fixing wire, and the support portion by the pad fixing wire and the fixing portion of the net member at the end portion on the seating surface side of the skin member And in contact with the net member.
According to the first aspect of the invention, since the pad member is provided in a state of being in surface contact with the net member, vibration transmitted from the frame structure to the net member is transmitted to the pad member and absorbed. become. The pad member is covered in a state where the pad member is in contact with the net member by stretching the skin member having one end (end on the seating surface side) fixed to the net member, and the vibration transmitted to the net member is appropriately Absorb.

The second invention is the first invention described above, the cushion characteristics of the pad member, require padding in order to 15mm compressive deformation by pressing the seating is 20φ sphere compression element from the surface on the side is skin member Load is 20 N or less.
Here, the cushion characteristics of the pad member are determined by various conditions such as the elasticity and thickness of the pad member and the tension state of the skin member. As this cushioning characteristic, for example, one having a load of 26 to 27 N required for compressing and deforming the pad member by 15 mm is known.
According to the second aspect of the invention, by setting the cushion characteristic of the pad member to be relatively soft as described above, the vibration absorption of the pad member can be enhanced.

The third invention is the first or the second invention described above, the skin member in a state where the end portion of the seating surface side is fixed by being sewn in advance the net member, the side to be seated paddings hooked covering the surface is one that has become so that is stretched.
According to the third aspect of the invention, since one end (end portion on the seating surface side) of the skin member is previously sewn and fixed to the net member, the skin member is stretched when the net member is stretched on the frame structure. member ing and the state in which it is multiplied by hanging to the net member.

The present invention can obtain the following effects by taking the above-described means.
According to the first invention, the vibration transmitted to the net member by the pad member can be suitably absorbed, so that the vibration absorbability of the net sheet can be improved.
According to the second invention, the vibration absorption of the net sheet can be further improved by using a soft pad member .
According to the third invention, the skin member can be more easily stretched by fixing one end (end portion on the seating surface side) of the skin member to the net member in advance .

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

  First, the net sheet 1 of Example 1 will be described with reference to FIGS. 1 is a sectional view showing the internal structure of the net sheet 1, FIG. 2 is a perspective view showing a schematic configuration of the net sheet 1, FIG. 3 is an exploded perspective view of the net sheet 1, and FIG. 4 is a vibration transmission characteristic of the net sheet. It is the graph showing.

As shown in FIG. 2, the net seat 1 of the present embodiment includes a seat back 10 that serves as a backrest portion of a seated occupant, a seat cushion 20 that serves as a seating portion, and a headrest 30 that supports the head. Have. As shown in FIG. 3, the net seat 1 has net members 12, 22 with respect to a frame-shaped back frame 11 that forms the skeleton of the seat back 10 and a frame-shaped cushion frame 21 that forms the skeleton of the seat cushion 20. Are each stretched. Here, the back frame 11 and the cushion frame 21 correspond to the frame structure of the present invention.
Further, pad members 13 and 23 are assembled to the back frame 11 and the cushion frame 21 so as to cover the seating side surfaces 11a and 21a, respectively. Thereby, since the hard back frame 11 and the cushion frame 21 can be respectively covered with the soft pad members 13 and 23, it is difficult to feel a foreign object feeling when sitting on the net sheet 1, and the seating feeling is improved. ing. Here, the “seat side surface” is a surface on the side on which the occupant is seated, and when referring to the constituent member of the seat back 10, it represents the front surface of the vehicle, and when referring to the constituent member of the seat cushion 20. It represents the upper surface of the vehicle.
As shown well in FIG. 1, the pad members 13 and 23 are provided in contact with the net members 12 and 22 stretched on the back frame 11 and the cushion frame 21, respectively. In this case, the vibration input to the net seat 1 acts to absorb the vibration so that it is not transmitted to the occupant. In the net sheet 1 of the present embodiment, the assembly structure is such that the vibration absorbing ability by the pad members 13 and 23 is suitably exhibited. Hereinafter, each component of the net sheet 1 will be described in detail.

  First, as shown in FIG. 3, the seat back 10 is assembled with a net member 12, a pad member 13, a skin member 14, a back board 15, and a headrest 30 with respect to a frame-shaped back frame 11 that forms a skeleton thereof. It becomes the composition.

Specifically, as shown in FIG. 1, the net member 12 is attached to a net fixing portion 11 c set on the outer edge of the side frame 11 b that forms both side frames of the back frame 11. Specifically, the net member 12 is attached to the back frame 11 by engaging a resin hook 12b integrally attached along the peripheral shape of the net member 12 with the net fixing portion 11c.
The net member 12 is formed of a three-dimensional knitted fabric having a so-called three-dimensional structure in which mesh layers are respectively provided on the front and back side surfaces, and both mesh layers are coupled by a number of piles. The net member 12 is configured to be easily compressed and deformed in the thickness direction (out-of-plane direction) and difficult to be tensile-deformed in the surface direction (in-plane direction) due to the pile coupling structure. Moreover, the net member 12 has a configuration in which vibration absorption is enhanced by the structure of both mesh layers. Specifically, the pile has a cross-sectional diameter of each pile: 350 to 400 D, a set number of piles: 28 to 40 pieces / cm ² , and an arrangement angle of the piles: 60 to 70 °. And by this pile connection structure, the net member 12 is formed in a relatively thick shape with a thickness dimension between the mesh layers of 5 to 20 mm. Thereby, when the thickness dimension between both mesh layers is 11 mm, for example, the net member 12 has a deflection amount of 6 mm or more and 80% or less of the thickness dimension when an 80φ spherical compressor is compressed at 200 N. The compression characteristics can be accommodated in Further, the net member 12 has a tensile property that a load when it is stretched 10% in the in-plane direction by a 300φ circular sample is 50 to 100 N / 25 mm. In the compression test, the spherical compressor has a flat pressing surface. In addition, the tensile test is performed at a tensile speed of 200 mm / min and a grip interval of 200 mm. Further, the net member 12 employs a structure in which insertion threads are linearly inserted into both mesh layers (see Japanese Patent Application Laid-Open No. 2003-3354). After loading, the structure is easy to return to its original state, and even if it is repeatedly loaded, the rebound feeling is unlikely to decrease.

Next, as well shown in FIG. 3, the pad member 13 is formed in a substantially gate shape capable of covering the seating side surface 11a of the back frame 11, and extends forward of the vehicle with respect to the side frame 11b. It is attached to a pad fixing wire 11d provided integrally as a shape. Thereby, the pad member 13 is fixed as a state in which the pad member 13 is disposed at a position covering the seating side surface 11a of the back frame 11, as well shown in FIG. Specifically, the pad member 13 is disposed in a state in which the pad member 13 is in contact with the seating side surface 12 a of the net member 12 in a state of being stretched on the back frame 11. In this embodiment, the pad member 13 is disposed in surface contact with the seating side surface 12 a of the net member 12. Therefore, the pad member 13 can absorb vibration transmitted from the back frame 11 to the net member 12. The pad member 13 is formed of a so-called mold pad formed by foaming a flexible polyurethane foam raw material, and is known as a material excellent in vibration absorption capability.
Next, as shown in FIG. 1, the skin member 14 is attached to a skin fixing wire 11 e whose rear end portion 14 c is integrally provided on the back side surface of the side frame 11 b. The skin member 14 is formed of an elastic cloth material, and the front end portion 14b is sewn and fixed to the net member 12. Here, the front end portion 14b corresponds to the seating surface side end portion of the present invention. Accordingly, the skin member 14 is in a state of hanging on the net member 12 when the net member 12 is attached to the net fixing portion 11c. The back frame 11 can be stretched by covering the seating side surface 13a and attaching the rear end portion 14c to the skin fixing wire 11e against the elasticity of the skin member 14. Thereby, the pad member 13 can be held in a state in which the pad member 13 is in good contact with the net member 12. Further, since the front end portion 14b of the skin member 14 stretched so as to cover the seating side surface 13a of the pad member 13 is sewn and fixed to the net member 12, the vibration transmitted to the net member 12 is It can transmit suitably to the pad member 13 through the skin member 14, and a vibration can be absorbed suitably in the pad member 13. FIG.
Here, in the state in which the skin member 14 is stretched on the seating side surface 13a, the pad member 13 is compressed and deformed by 15 mm by a load applied from the seating side surface 14a of the skin member 14 (pressing load of a spherical compressor of 20φ). Therefore, the cushion characteristic (surface hardness) is set so that the load necessary for this is 20 N or less. That is, by setting the cushion characteristic of the pad member 13 to be relatively soft as described above, the vibration absorption of the pad member 13 can be enhanced. Specifically, the vibration absorption characteristic of the net sheet 1 of the present example is as a measurement result b shown in FIG. Here, the measurement result a is a result of measuring the vibration absorption characteristics of a seat having a configuration in which a urethane pad as a cushion member is assembled to the entire seating side surface of the seat back. In addition, the measurement result c is a sheet having an arrangement configuration substantially the same as that of the net sheet 1 of the present embodiment, but a high-hardness urethane pad is used instead of the pad member 13, and a low tensile strength is substituted for the net member 12. It is the result of having measured the vibrational absorption characteristic of the sheet | seat of the structure using a net member. Here, each measurement result a, b, c is applied to the seating side surface of the seat back 10 with respect to vibration (vibration intensity: 30 dB, load: 40 kgf) of each frequency (Hz) input from the lower part of the seat. This represents the output (transmitted) vibration transmissibility (dB). Therefore, it can be said that the lower the value of the vibration transmissibility (dB), the smaller the vibration transmitted to the occupant and the better the vibration absorption. From this measurement result, the measurement result b relating to the net sheet 1 of the present example exhibits an excellent vibration absorbing ability close to the sheet of the measurement result a, that is, a seat having a configuration in which a urethane pad is assembled to the entire seating side surface of the seat back. I understand that In other words, it can be seen that the measurement result b exhibits a vibration absorbing ability superior to the measurement result c. This difference in vibration absorption ability is particularly prominent in the high frequency region (the region on the right side in the drawing) shown in FIG.

Next, as well shown in FIG. 3, the backboard 15 is attached to a board fixing wire 11f provided integrally as a state of being bridged between the side frames 11b. The back board 15 is attached to the back frame 11 by engaging a hook 15b integrally attached to the seating side face 15a with the board fixing wire 11f.
Next, as shown well in FIG. 3, the headrest 30 is attached to a headrest fixing portion 11 g provided integrally with an upper frame 11 h that forms an upper frame of the back frame 11. The headrest 30 is attached to the back frame 11 by fixing a support 32 that supports a stay 31 provided below the lower surface of the headrest 30 to the headrest fixing portion 11g. The net member 12 and the pad member 13 described above are respectively formed with headrest insertion holes 12c and 13b that serve as insertion holes when the headrest 30 is attached.

Next, the seat cushion 20 has an assembly configuration substantially the same as the cushion structure in the seat back 10 described above. That is, as shown well in FIG. 3, the net member 22, the pad member 23, the skin member 24, and the cloth spring 25 are assembled to the frame-shaped cushion frame 21 constituting the skeleton.
Accordingly, the net member 22, the pad member 23, and the skin member 24 have substantially the same configuration and function as the net member 12, the pad member 13, and the skin member 14 that are constituent members of the seat back 10, and therefore the details thereof are simple. This is explained as follows.
That is, the net member 22 is attached to the net fixing wire 21c attached to the outer edge of the side frame 21b that forms both side frames of the cushion frame 21, as well shown in FIG. Specifically, the net member 22 is attached to the cushion frame 21 by engaging a resin hook 22b integrally attached along the peripheral shape of the net member 22 with the net fixing wire 21c. Next, as well shown in FIG. 3, the pad member 23 is formed in a substantially gate shape capable of covering the seating side surface 21a of the cushion frame 21, and is attached to the side frame 21b or the front panel 21d. It is attached to a fixed part (not shown). As a result, the pad member 23 is fixed in a state where the pad member 23 is disposed at a position covering the seating side surface 21 a of the cushion frame 21. Specifically, the pad member 23 is disposed in a state (not shown) in contact with the seating side surface 22 a of the net member 22 in a state of being stretched on the cushion frame 21. Therefore, the vibration transmitted from the cushion frame 21 to the net member 22 can be absorbed by the pad member 23. Next, as shown in FIG. 3, the skin member 24 is attached to a skin fixing wire (not shown) integrally provided on the back side surface of the side frame 21b. The skin member 24 is formed of a cloth material having elasticity, and an upper end portion 24b is sewn and fixed to the net member 22. Here, the upper end 24b corresponds to the seating surface side end of the present invention. Therefore, the skin member 24 is in a state of being hung on the net member 22 in a state where the net member 22 is attached to the net fixing wire 21c. The cushion frame 21 can be stretched by covering the seating side surface 23a and attaching its lower end (not shown) to the skin fixing wire (not shown) against the elasticity of the skin member 24. Thereby, the pad member 23 can be held in a state in which the pad member 23 is in good contact with the net member 22. Further, since the upper end portion 24b of the skin member 24 stretched in a state of covering the seating side surface 23a of the pad member 23 is sewn and fixed to the net member 22, the vibration transmitted to the net member 22 is It can be suitably transmitted to the pad member 23 through the skin member 24, and the vibration can be suitably absorbed in the pad member 23.
Further, the cloth spring 25 is provided to assist the supporting force for supporting the seating load of the occupant in the seat cushion 20. The cloth spring 25 is formed of a cloth material having elasticity, and a cloth spring fixing wire provided on the cushion frame 21 with resin hooks 25a and 25b integrally attached to the vehicle front-rear direction end. It is attached to the cushion frame 21 by engaging with 21f and the spring unit 21g. The former cloth spring fixing wire 21f is integrally attached to the front panel 21d. The latter spring unit 21g is provided so as to be pivotable by a support shaft spanned between the side frames 21b. The spring unit 21g can hold the cloth spring 25 in a stretched state in the vehicle front-rear direction by the biasing action of the built-in spring member. Further, the tension state of the cloth spring 25 can be adjusted by changing the rotational posture position of the spring unit 21g by means of manual operation or the like.
Therefore, also in the seat cushion 20 having the above-described configuration, the excellent vibration absorbing ability as shown in FIG. 4 can be exhibited, similarly to the seat back 10 described above.

In addition, about the usage method of a present Example, detailed description is abbreviate | omitted as the outstanding vibration absorptivity in the said seat back 10 and the seat cushion 20 is exhibited.
Thus, according to the net sheet 1 of the present embodiment, the pad members 13 and 23 can be provided in a state where they are preferably brought into contact with the seating side surfaces 12a and 22a of the net members 12 and 22, respectively. Since the pad members 13 and 23 are not affected by the tensioning force of the net members 12 and 22 stretched on the back frame 11 and the cushion frame 21, respectively, they are not crushed by the tensioning force. Therefore, since the vibration transmitted from the back frame 11 or the cushion frame 21 to the net members 12 and 22 can be suitably absorbed by the pad members 13 and 23, the vibration absorbability of the net sheet 1 can be improved. it can. Furthermore, since the cushion characteristics of the pad members 13 and 23 are set to be relatively soft, the vibration absorption of the net sheet 1 can be further improved. Furthermore, since the end portions of the skin members 14 and 24 are fixed to the net members 12 and 22 in advance, when the net members 12 and 22 are stretched on the back frame 11 and the cushion frame 21, respectively, The members 12 and 22 can be left hanging. Therefore, the skin members 14 and 24 can be more easily stretched.

Although the embodiment of the present invention has been described with one example, the present invention can be implemented in various forms in addition to the above example.
For example, in the above-described embodiment, the pad member and the net member are arranged in a contact state in which the pad member and the net member are merely brought into surface contact.
Further, the cushioning characteristics of the respective constituent members such as the net member and the pad member are not limited to those shown in the present embodiment, and various types can be applied. However, it should be noted that depending on the cushioning characteristics of the member used, the vibration absorbing ability may not be suitably exhibited as compared with that shown in the present embodiment.
In addition, the end of the skin member may not be sewn to the net member in advance, and the skin member may be sewn and fixed after the pad member or net member is installed. However, in this case, attention should be paid because the tension to the back frame and the cushion frame may be troublesome as compared with the configuration shown in the present embodiment.

It is sectional drawing showing the internal structure of the net sheet. It is a perspective view showing the schematic structure of a net sheet. It is a disassembled perspective view of a net sheet. It is a graph showing the vibration transmission characteristic of a net sheet.

Explanation of symbols

1 Net seat 10 Seat back 11 Back frame (frame structure)
11a Seat side surface 11b Side frame 11c Net fixing portion 11d Pad fixing wire 11e Skin fixing wire 11f Board fixing wire 11g Headrest fixing portion 11h Upper frame 12 Net member 12a Seating side surface 12b Hook 12c Headrest insertion hole 13 Pad member 13a Headrest side surface 13b Headrest Insertion hole 14 Skin member 14a Seating side surface 14b Front end (seat surface side end)
14c Rear end portion 15 Backboard 15a Seating side surface 15b Hook 20 Seat cushion 21 Cushion frame (frame structure)
21a Seating side surface 21b Side frame 21c Net fixing wire 21d Front panel 21f Cloth spring fixing wire 21g Spring unit 22 Net member 22a Seating side surface 22b Hook 23 Pad member 23a Seating side surface 24 Skin member 24b Upper end (seat surface side end)
25 Cloth spring 25a Hook 25b Hook 30 Headrest 31 Stay 32 Support

Claims (3)

A net seat that elastically supports a seating load of an occupant by a net member stretched on a frame-shaped frame structure that forms a skeleton of the seat,
A pad member serving as a cushion material provided in contact with the surface on the side on which the net member is seated;
A skin member stretched so as to cover the surface of the pad member to be seated,
Wherein the side frames constituting the side frames of the frame structure, respectively, and are extended outwardly in the lateral direction from the side frames net fixing portion which is set on the outer edge of the side frames, the cars A pad fixing wire extending from the side frame toward the seating surface is integrally formed,
The net member is stretched by being fixed to the net fixing portions by hooks whose left and right edges are set at substantially the same horizontal position as the pad fixing wire. The pad member is covered and stretched in a state where the end on the seating surface side is fixed to the net member, and the pad member is in contact with the net member. As a state of being supported and fixed at a position protruding to the seating surface side from the side frame, between the support location by the pad fixing wire and the location of fixing the net member at the end on the seating surface side of the skin member A net sheet characterized by being provided in a state of surface contact with a net member. The net sheet according to claim 1,
The cushion characteristic of the pad member is that a load necessary for compressing and deforming the pad member by 15 mm by pressing a 20φ spherical compressor from the surface on which the skin member is seated is 20 N or less. A characteristic net sheet. The net sheet according to claim 1 or 2,
The skin member is stretched so as to be covered and stretched on the surface of the pad member on which the pad member is seated in a state where the end portion on the seating surface side is previously sewn and fixed to the net member. Net sheet characterized by being.

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