JP2016086832A - Shield member for chair, and chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield member for a chair, and a chair capable of efficiently blocking the entry of sound from the back or the side of a seated person.SOLUTION: A shield member for a chair includes a sound insulation plate 30 that functions as a strength member and blocks the entry of sound from the back or the side of a seated person, and an exterior member 31 that covers the outside of the sound insulation plate 30. The exterior member 31 includes an inner sound absorption layer 31A that is externally fitted to the sound insulation plate 30 and covers both the front side and the back side of the sound insulation plate 30, and an outer sound absorption layer 31B that is arranged on the front surface side and the back surface side of the inner sound absorption layer 31A. The inner sound absorption layer 31A is formed more densely than the outer sound absorption layer 31B.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a chair shielding member that is attached to a chair main body and blocks sound from the back or side of a seated person, and a chair.

  As a chair used for office work or the like, a chair with a headrest attached to the upper part of the backrest is known. The main function of the headrest is to support the seated person's head from the rear side when the seated person sitting on the chair tilts the head backward.

  As a headrest of a chair attached to a backrest, a chair with a built-in acoustic device is known (see, for example, Patent Document 1).

In the headrest described in Patent Document 1, a highly rigid vibration transmission member is embedded in the cushion material, and a vibration body such as a voice coil is installed in the vibration transmission member, and the vibration transmission member is a frame in the backrest. To be mechanically connected to. In this headrest, the vibration of a vibrating body such as a voice coil is transmitted to the backrest frame through a highly rigid vibration transmitting member, so that the seated person sitting on the chair can experience acoustic vibration.
Moreover, the headrest described in Patent Document 1 is provided with wings that are bent obliquely outward and forward on the left and right sides of the vibration transmitting member, and a speaker unit is attached to the wings. Each of the left and right wing parts is covered with a cushioning material and is attached to the vibration transmission member via a hinge so as to be rotatable.

No. 02-015431

By the way, a seated person who sits on a chair and performs work or the like is desired to have an environment in which ambient noise can be shielded as much as possible.
When viewed from the viewpoint of shielding ambient noise, the headrest described in Patent Document 1 is formed from a member having high sound insulation and a high rigidity, such as metal, so that the vibration from the rear of the seated person can be reduced. A small amount of sound can be blocked.

  However, although the headrest described in Patent Document 1 can block the entry of sound to some extent by the vibration transmission member, it efficiently generates the sound that tries to go around the vibration transmission member and the vibration that tries to vibrate the vibration transmission member itself. It cannot be absorbed (attenuated). That is, the above-mentioned headrest is provided for the purpose of flexibly supporting the seated person's head, although the cushion material is disposed in the periphery of the highly rigid vibration transmitting member. For this reason, the single cushion layer covers only a part of the vibration transmitting member, and it is not possible to efficiently absorb the sound that is about to enter from behind or from the side of the seated person by the cushion material.

  Therefore, the present invention is intended to provide a chair shielding member and a chair that can efficiently block the entry of sound from the back or side of a seated person.

  In order to solve the above problems, a chair shielding member according to the present invention is attached to a chair body, functions as a strength member, and blocks sound from the back or side of a seated person, An exterior member that covers the outside of the sound insulation board, and a shield member for a chair that is formed in a shape that covers the back and left and right sides of the head of a seated person seated on the chair body. An inner sound-absorbing layer that is externally fitted to the sound-insulating plate and covers both the front and back sides of the sound-insulating plate, and an outer sound-absorbing layer that is disposed on the front surface side and the back surface side of the inner sound-absorbing layer, It was made to be formed with a higher density than the outer sound absorbing layer.

As a result, when sound enters from behind or from the side of the seated person, the sound is absorbed by the outer sound absorbing layer and the inner sound absorbing layer on the back surface side of the exterior member, and by the sound insulating plate functioning as a strength member. Shielded. Moreover, the sound that tries to go around to the surface side of the sound insulating plate is absorbed by the inner sound absorbing layer and the outer sound absorbing layer on the surface side of the sound insulating plate. In addition, the exterior member that covers the outside of the sound insulating plate has an outer sound absorbing layer and an inner sound absorbing layer that is disposed inside the outer sound absorbing layer and has a higher density than the outer sound absorbing layer. Can be efficiently absorbed by the outer sound absorbing layer and the inner sound absorbing layer.
Further, the outer sound absorbing layer located on the outer side has a lower density than the inner sound absorbing layer, and therefore is relatively soft with respect to the inner sound absorbing layer. For this reason, it becomes easy to deform the outer sound absorbing layer, and it becomes possible to easily form the outer surface shape constituting the design surface.

The inner sound absorbing layer may be formed with a slit having a width substantially the same as that of the sound insulating plate and opening in a direction intersecting the thickness direction.
In this case, the sound insulating plate can be easily disposed inside the inner sound absorbing layer through the slit.

The sound insulation board is a single member that is curved or bent so as to cover the back and left and right sides of the head of a seated person seated on the chair body, and the inner sound absorbing layer and the slit are The shape may be formed along the sound insulating plate.
In this case, since the sound insulation plate that functions as a strength member is a single member that curves or bends so as to cover the back of the seated person's head and the left and right sides, the seated person's head The shape which covers the back of a part and the left-right side can be maintained stably. Moreover, since the inner sound absorbing layer and the slit are shaped along the sound insulating plate, the sound insulating plate can be easily disposed inside the inner sound absorbing layer through the slit.

Of the outer sound absorbing layer, the front layer portion positioned on the seat occupant side has a shorter extension length in the direction substantially perpendicular to the vertical direction than the rear layer portion positioned on the side opposite to the seat occupant. It may be formed.
In this case, when the outer sound absorbing layer is bent into a shape that covers the back of the seated person's head and the left and right sides, the extension of the surface that is the outer side in the bending direction is the extension of the surface that is the inner side of the bending direction. It becomes longer than the length. The outer sound-absorbing layer has an extension length in a direction substantially perpendicular to the vertical direction of the front layer portion that is shorter than the rear layer portion in advance, so that extra length portions such as wrinkles are less likely to occur on the inner side surface in the bending direction. Become. Therefore, the appearance appearance can be improved by adopting this structure.

The exterior member is covered with a skin material, and the outer sound-absorbing layer includes a front layer portion located on the seated person side and a rear layer portion located on the side opposite to the seated person as separate members. The outer sound absorbing layer may be configured such that one of the front layer portion and the rear layer portion is bonded to the inner surface of the skin material, and the other is bonded to the inner sound absorbing layer.
In this case, since either the front layer portion or the rear layer portion of the outer sound absorbing layer is joined to the inner surface of the skin material, the shape of the skin material is changed when the skin material is attached to the outside of the sound insulating plate and the exterior member. It can be easily held by the rear layer portion or the front layer portion joined inside. Therefore, by adopting this structure, it is possible to easily attach the skin material.

It is preferable that a rear layer portion of the outer sound absorbing layer is bonded to an inner surface of the skin material, and a front layer portion of the outer sound absorbing layer is bonded to the inner sound absorbing layer.
In this case, at the time of manufacture, the rear layer portion of the outer sound absorbing layer is bonded to the inner surface of the skin material, and the skin material can be covered on the outer side of the sound insulating plate and the exterior member in that state. For this reason, it becomes difficult to form a gap between the inner surface of the skin material and the rear layer portion of the outer sound absorbing layer. Therefore, by adopting this structure, it becomes difficult for the skin material to rise due to the gap between the rear layer portion of the outer sound absorbing layer and the skin material on the outer surface side, which is easily noticeable from the outside. More advantageous.

  In the chair according to the present invention, the chair shielding member according to any one of the above is provided on an upper portion of the backrest.

  According to this invention, the exterior member includes the inner sound absorbing layer that is fitted on the sound insulating plate and covers both the front and back sides of the sound insulating plate, and the outer sound absorbing layer that is disposed on the front side and the back side of the inner sound absorbing layer. Therefore, the sound that enters the sound insulation board and the sound that tries to go around the sound insulation board can be absorbed by the outer sound absorption layer and the inner sound absorption layer. Since it is formed with a higher density than the sound absorbing layer, it is possible to efficiently absorb sounds of various frequencies.

It is a front view of the chair concerning one embodiment of this invention. It is a left view of the chair which concerns on one Embodiment of this invention. It is a rear view of the chair concerning one embodiment of this invention. It is a top view of the chair which concerns on one Embodiment of this invention. It is sectional drawing corresponding to the VV cross section of FIG. 3 of the chair which concerns on one Embodiment of this invention. It is sectional drawing corresponding to a cross section to VI-VI of FIG. 3 of the chair which concerns on one Embodiment of this invention. It is a partial exploded perspective view of the shielding member concerning one embodiment of this invention. It is sectional drawing corresponding to a cross section in VIII-VIII of FIG. 3 of the chair which concerns on one Embodiment of this invention. It is a top view of some components of the shielding member concerning one embodiment of this invention. It is an exploded sectional view of the shielding member concerning one embodiment of this invention. It is a fragmentary sectional perspective view of the shielding member concerning one embodiment of this invention. It is sectional drawing corresponding to the XII-XII cross section of FIG. 11 of the shielding member which concerns on one Embodiment of this invention. It is a top view of some components of the shielding member concerning one embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the front of a person seated in a normal posture on the chair 1 is called “front”, and the opposite side is called “rear”. For “upper”, “lower”, “left”, and “right”, the upper side of the person seated in the chair 1 in the normal posture is called “up”, and the opposite side is called “lower”, and the chair is in the normal posture. The left side of the person seated in is called “left” and the opposite side is called “right”. In the figure, the arrow FR points forward, the arrow UP points upward, and the arrow LH points leftward.

FIG. 1 is a view of a chair 1 according to this embodiment as viewed from the front, and FIG. 2 is a view of the chair 1 as viewed from the left side. 3 is a view of the chair 1 as viewed from the back, and FIG. 4 is a view of the chair 1 as viewed from the top.
As shown in these drawings, a chair 1 according to this embodiment includes a leg portion 10 placed on a floor surface, a box-like support base 11 installed at an upper end of the leg portion 10, and a support base 11. A seat 12 that is attached to the upper surface side of the seat 12 and supports the buttocks of the seated person, a backrest 13 that is attached to the rear part of the support base 11 and supports the back of the seated person m, and left and right side portions on the lower surface side of the seat 12 And an armrest 15 that extends to the upper side of the seat 12 and on which the elbow and armtip of the seated person m are placed. Furthermore, the chair 1 is attached to the upper part of the backrest 13 and is attached to the upper part of the backrest 13 via the headrest 16 and the headrest 16 that supports the head h of the seated person m from behind. A chair shielding member 17 (hereinafter referred to as a “shielding member 17”) that covers the rear side and the left and right sides of the head h.

  The leg portion 10 includes a multi-leg 18 with casters 18 a and a pedestal 19 that stands up from the center of the multi-leg 18 and incorporates a gas spring as a lifting mechanism, and is supported on the upper end of the pedestal 19. 11 is attached. The support base 11 incorporates an elevation adjustment mechanism for the pedestal 19 and a tilt adjustment mechanism for the backrest 13.

  The backrest 13 includes a backrest main body 20 that receives a load from the back of the seated person m, and a backrest frame 21 that is attached to the back of the backrest main body 20 and has strength to support the load of the seated person m. Yes. The backrest body 20 has a resin-made back plate 20a (see FIG. 3) having a substantially rectangular shape when viewed from the front, and the front surface and the peripheral edge of the back plate 20a are covered with a skin material 20b. The backrest body 20 is curved along the vertical direction so that the position corresponding to the waist of the seated person m (the position raised upward by about one third from the bottom) bulges forward most. Has been.

  The backrest frame 21 includes a substantially pentagonal frame-shaped frame portion 21A facing downward and a connecting frame portion 21B that extends downward from the lower end of the frame-shaped frame portion 21A and then curves and extends forward. Have. The end of the connection frame portion 21B is connected to a tilting mechanism in the support base 11 via a connection stay (not shown).

The frame-like frame portion 21A of the backrest frame 21 is disposed on the rear side of the backrest main body 20, and the left and right side portions 21A-s, 21A-s of the upper half and the edge on the lower end side are the backrest main body. 20 is connected. The upper ends of the left and right side portions 21 </ b> A-s and 21 </ b> A-s are connected by upper side portions 21 </ b> A-u that form a horizontal beam on the upper side of the backrest frame 21.
The upper side portion 21A-u has a central region curved in a concave shape on the rear side with respect to the left and right end portions connected to the side side portions 21A-s and 21A-s. A component mounting portion 23 for mounting additional functional components such as the headrest 16 is provided on the rear surface of the central region in the width direction of the upper side portions 21A-u. Although not shown in detail, the component mounting portion 23 is provided with a seat surface on which the mounting base portion of the additional function component abuts and a bolt fastening portion for fastening and fixing the mounting base portion. In this embodiment, the headrest 16 is attached to the component attachment portion 23.
In this embodiment, the portion other than the headrest 16 and the shielding member 17 such as the backrest 13, the seat 12, and the leg portion 10 constitutes the chair body.

5 is a sectional view of the headrest 16 and the shielding member 17 corresponding to the VV section of FIG. 3, and FIG. 6 is a sectional view of the headrest 16 and the shielding member 17 corresponding to the VI-VI section of FIG. is there. FIG. 7 is an exploded view of a part of the shielding member 17, and FIG. 8 is a sectional view of the headrest 16 and the shielding member 17 corresponding to the VIII-VIII section of FIG.
As shown in FIG. 6, the headrest 16 includes a headrest main body portion 25 in which the outer side of the cushion material 25 a is covered with a skin material 25 b, and a headrest frame made of a hard material such as metal embedded in the headrest main body portion 25 on the upper side. 26, and the lower edge portion of the headrest frame 26 is an attachment base portion 26a that is fastened and fixed to the component attachment portion 23 of the backrest frame 21. Further, as shown in FIGS. 3 and 8, side projecting portions 26 b and 26 b that project to the left and right sides and support the lower surface of the headrest body 25 are provided at the upper end position of the mounting base portion 26 a of the headrest frame 26. It is integrally formed. As shown in FIG. 8, a fastening hole 27 (screw hole) is formed in the side projecting portion 26 b in order to attach the shielding member 17.

  As shown in FIGS. 4 and 5, the shielding member 17 is formed in a substantially U shape when viewed from above, and includes a rear wall portion 17 </ b> A that covers the rear side of the head h of the seated person m, and the seated person m. And side wall portions 17B and 17B covering the left and right sides. The rear wall portion 17 </ b> A is disposed on the back portion side of the cushion material 25 a of the headrest 16 in a state where the shielding member 17 is attached to the upper portion of the backrest frame 21. The side walls 17B and 17B extend forward on the outside in the chair width direction from the left and right side end surfaces of the backrest 13 in a state where the shielding member 17 is attached to the upper portion of the backrest frame 21. Further, as shown in FIG. 2, the side wall portions 17B and 17B have the center position of the grounding portion of the leg portion 10 (the axial center position of the pedestal column 19) in a state where the shielding member 17 is attached to the upper portion of the backrest frame 21. ) Extends to the front side. Accordingly, the left and right sides of the head h (ear and eye height positions) of the seated person m seated on the chair 1 in the normal posture are covered with the side wall portions 17B and 17B with a sufficient separation width in the left-right direction.

  In addition, as shown in FIG. 2, the upper sides of the left and right side wall portions 17B extend substantially horizontally forward from the base side connected to the rear wall portion 17A, but the lower sides of the side wall portions 17B are rear wall portions. The base side connected to 17A extends slightly downward and then curves upward and extends forward. Therefore, the lower surface on the distal end side of the side wall portion 17B is recessed in a concave shape upward with respect to the lower surface on the base side. For this reason, it can avoid that the lower part of the side wall part 17B contacts the shoulder part and arm part of the seated person m by the concave hollow part 40. FIG.

  As shown in FIGS. 1 and 4 and the like, a sound absorbing bulging portion 41 that bulges partially toward the seated person m is formed at a position above the concave depression 40 of the side wall portion 17B. Has been. The sound-absorbing bulging portion 41 blocks a sound that is directed from the outside to the inside of the side wall portion 17B, and wraps around the lower side of the side wall portion 17B to the head h side of the seated person m. It also functions to block sound. The optimum position in the front-rear direction of the side wall portion 17B of the sound absorbing bulge portion 41 is the outer side position of the ear of the seated person m seated on the chair 1 in the normal posture.

  The shielding member 17 functions as a strength member, and blocks the sound from the rear or side of the seated person m, a sound-insulating plate 31 that covers the outside of the sound-insulating plate 30, and an exterior member And a bag-shaped skin material 32 covering the outside of 31. As the sound insulating plate 30, for example, a metal plate material or the like can be used, and as the exterior member 31, urethane, nonwoven fabric, or the like using resin fiber as a main raw material can be used. Further, as the skin material 32, a woven fabric such as a resin fiber can be used.

  As shown in FIG. 7 and the like, the sound insulating plate 30 is formed in a substantially U-shape when viewed from above, and gently curves from the rear wall 30a and the left and right sides of the rear wall 30a and extends forward. And side walls 30b, 30b. The sound insulating plate 30 is formed by bending a single member (for example, a metal plate) into a substantially U shape. Further, fixing pieces 29 and 29 for fastening and fixing the shielding member 17 to the headrest frame 26 are bent and extended to the front side at positions separated from the left and right of the lower end of the rear wall portion 30a of the sound insulating plate 30. Yes.

  The exterior member 31 includes an inner sound absorbing layer 31A that is externally fitted to the sound insulating plate 30 and covers both front and back sides of the sound insulating plate 30, and an outer sound absorbing layer 31B that covers both front and back sides of the inner sound absorbing layer 31A. The inner sound absorbing layer 31A is formed with higher density and higher rigidity than the outer sound absorbing layer 31B. Further, the inner sound absorbing layer 31A is formed thinner than the outer sound absorbing layer 31B.

  The inner sound absorbing layer 31A is configured by joining two sound absorbing members of the same material having substantially the same shape in plan view by heat welding or the like. Here, if the sound absorbing member positioned on the seated person m side is referred to as a front layer portion 31A-f, and the sound absorbing member positioned on the side opposite to the seated person m is referred to as a rear layer portion 31A-r, Between the front layer portion 31A-f and the rear layer portion 31A-r joined to each other, a slit 33 is formed having a width substantially the same as that of the sound insulating plate 30 and opening downward (opening in a direction intersecting the thickness direction). Has been.

  Further, the outer sound absorbing layer 31B is constituted by two sound absorbing members having substantially the same shape as the inner sound absorbing layer 31A in plan view. Here, the sound absorbing member positioned on the seated person m side is referred to as a front layer portion 31B-f, and the sound absorbing member positioned on the side opposite to the seated person m is referred to as a rear layer portion 31B-r. The layer portion 31B-f is integrally joined to the front side of the front layer portion 31A-f of the inner sound absorbing layer 31A by welding or the like, and the rear layer portion 31B-r is not joined to the inner sound absorbing layer 31A. The skin material 32 is joined to the inner surface on the back surface side by stitching or adhesion.

9 is a front view showing the exterior unit U in which the front layer portion 31B-f of the outer sound absorbing layer 31B is joined to the front side of the inner sound absorbing layer 31A. FIG. FIG. In FIG. 9, the exterior unit U is shown in a flatly developed state, but the exterior unit U is joined to each other by heat welding or the like in a state where the exterior unit U is bent in substantially the same shape as the sound insulating plate 30 in advance. Alternatively, the members in a flatly developed state may be heated in the manufacturing machine and welded to each other, and then deformed into substantially the same shape as the sound insulating plate 30.
When manufacturing the shielding member 17, as shown in FIGS. 7 and 9, the sound insulation plate 30, the exterior unit U, and the rear layer portion 31 </ b> B-r of the outer sound absorption layer 31 </ b> B are joined to the inner surface on the back surface side. The skin material 32 is prepared, and first, the sound insulating plate 30 is inserted into the slit 33 of the inner sound absorbing layer 31A of the exterior unit U from below. At this time, the sound insulating plate 30 is disposed almost entirely in the slit 33 except for the pair of fixing pieces 29 and 29 at the lower end, and the pair of fixing pieces 29 and 29 protrudes downward and forward from the lower end of the exterior unit U. .

  Next, the exterior unit U in which the sound insulating plate 30 is disposed in the slit 33 from this state is accommodated inside the skin material 32 through the opening at the lower end of the bag-shaped skin material 32. At this time, on the back side of the rear layer portion 31A-r of the inner sound absorbing layer 31A of the exterior unit U, the rear layer portion 31B-r of the outer sound absorbing layer 31B joined to the inner surface on the back surface side of the skin material 32 is overlaid. Be matched. At this time, the pair of fixing pieces 29, 29 protrude from the lower end of the skin material 32 downward and forward. Finally, the opening at the lower end of the bag-shaped skin material 32 is closed by a wire fastener or the like.

Further, in the shielding member 17 manufactured in this manner, the rear wall portion 17A is applied to the back portion of the headrest 16, and the left and right fixing pieces 29 are attached to the side projecting portions 26b of the headrest frame 26 as shown in FIG. The screw 34 is fastened in contact with the lower surface to be fixed to the headrest 16 integrally.
The shielding member 17 thus fixed to the headrest 16 is integrally fixed to the backrest 13 by fastening the attachment base portion 26 a of the headrest 16 to the component attachment portion 23 on the upper portion of the backrest frame 21.

11 is a perspective view showing the side wall portion 17B of the shielding member 17 with a partial cross section, and FIG. 12 is a cross-sectional view corresponding to the XII-XII cross section of FIG. Moreover, FIG. 13 is a figure which shows the shape before shaping | molding of front layer part 31A-f of the inner side sound absorption layer 31A.
At the lower end of the portion corresponding to the left and right side wall portions 17B of the front layer portion 31A-f of the inner sound absorbing layer 31A, as shown in FIG. 13, an extension portion 42 extending downward in a rectangular shape is extended. . The extended portion 42 is bent and bent inward so that the end surface thereof is in contact with the surface of the rear layer portion 31A-r of the inner sound absorbing layer 31A that is an adjacent sound absorbing member. The outside of the extended portion 42 bent in this way is covered by the lower edge of the front layer portion 31B-f of the outer sound absorbing layer 31B. The rear layer portion 31A-r, the front layer portion 31A-f of the inner sound absorbing layer 31A, and the front layer portion 31B-f of the outer sound absorbing layer 31B are joined to each other by thermal welding or the like in this state. As shown, a substantially semicircular cavity 43 is formed inside the extension 42. The sound-absorbing bulging portion 41 described above is formed by an extension portion 42 that is bent so as to partially lift from the adjacent rear layer portion 31A-r, and a front layer portion 31B-f of the outer sound-absorbing layer 31B that covers the outside. It is mainly composed.

As described above, in the shielding member 17 according to this embodiment, the exterior of the highly rigid sound insulating plate 30 that functions as a strength member is covered with the exterior member 31, and the exterior member 31 is externally fitted to the sound insulating plate 30. An inner sound absorbing layer 31A that covers both front and back sides of the sound insulating plate 30 and an outer sound absorbing layer 31B disposed on the front surface side and the back surface side of the inner sound absorbing layer 31A are provided. For this reason, the sound entering from behind or from the side of the seated person m can be blocked by the sound insulation plate 30, and the sound entering the sound insulation plate 30 or the sound insulation plate 30 tries to go around. Sound can be efficiently absorbed by the outer sound absorbing layer 31B and the inner sound absorbing layer 31A.
In particular, the shielding member 17 according to this embodiment efficiently absorbs noise including various frequency components because the inner sound absorbing layer 31A of the exterior member 31 is formed at a higher density than the outer sound absorbing layer 31B. Can do.

In the shielding member 17 according to this embodiment, since the inner sound absorbing layer 31A is formed with higher rigidity than the outer sound absorbing layer 31B, the inner sound absorbing layer 31A has high rigidity to the sound insulating plate 30 that functions as a strength member. Will be retained. Therefore, in the case of this shielding member 17, the entire shape can be stably held.
Furthermore, in the case of this embodiment, the outer sound absorbing layer 31B has a lower density than the inner sound absorbing layer 31A, and therefore is relatively soft with respect to the inner sound absorbing layer 31A. Therefore, by using this structure, the outer sound absorbing layer 31B can be easily deformed, and the outer surface shape constituting the design surface can be easily formed.

  In the case of the shielding member 17 according to this embodiment, the slit 33 that opens downward is formed in the inner sound absorbing layer 31 </ b> A with substantially the same width as the sound insulating plate 30. For this reason, at the time of manufacturing the shielding member 17, the sound insulating plate 30 can be easily disposed inside the inner sound absorbing layer 31 </ b> A through the slit 33.

  Further, the shielding member 17 according to this embodiment is formed by a single member in which the sound insulating plate 30 is curved in a substantially U shape, and the inner sound absorbing layer 31 </ b> A and the slit 33 are formed along the sound insulating plate 30. . For this reason, it is possible to stably maintain a shape that covers the rear side and the left and right sides of the head h of the seated person m by the rear wall portion 30a and the left and right side wall portions 30b and 30b that function as strength members. Can do. Further, since the inner sound absorbing layer 31A and the slit 33 are shaped along the sound insulating plate 30, by adopting this structure, the sound insulating plate 30 can also be easily disposed inside the inner sound absorbing layer 31A through the slit 33. .

  In the shielding member 17 according to this embodiment, the length along the bending direction of the front layer portion 31B-f of the outer sound absorbing layer 31B is the length along the bending direction of the rear layer portion 31B-r of the outer sound absorbing layer 31B. It is formed shorter than this. For this reason, extra length portions such as wrinkles due to a difference in circumferential length are less likely to occur on the inner side surface in the bending direction of the front layer portion 31B-f. Therefore, by adopting this structure, the appearance can be further improved.

  Further, in the shielding member 17 according to this embodiment, the outer sound absorbing layer 31B has a front layer portion 31B-f and a rear layer portion 31B-r as separate members, and the front layer portion 31B-f and the rear layer portion. One of 31B-r is joined to the inner surface of the skin material 32, and the other of the front layer part 31B-f and the rear layer part 31B-r is joined to the inner sound absorbing layer 31A. For this reason, when attaching the skin material 32 to the outside of the sound insulating plate 30 and the exterior member 31, the shape of the skin material 32 can be easily held by a part of the outer sound absorbing layer 31B. Therefore, the skin material 32 can be easily mounted by adopting this structure.

  In particular, in the case of this embodiment, the rear layer portion 31B-r side of the outer sound absorbing layer 31B is joined to the inner surface of the skin material 32, and the front layer portion 31B-f side is joined to the inner sound absorbing layer 31A. At the time of manufacture, the rear layer portion 31B-r of the outer sound absorbing layer 31B is joined to the inner surface of the outer skin material 32, and the outer skin unit 32 is covered with the outer skin material 32 in that state. Can do. Therefore, by manufacturing the shielding member 31 in this way, it becomes difficult to form a gap between the inner surface of the skin material 32 and the rear layer portion 31B-r of the outer sound absorbing layer 31B. As a result, the uplift of the skin material 32 due to the gap between the rear layer portion 31B-r of the outer sound absorbing layer 31B and the skin material 32 is less likely to occur on the outer surface of the shielding member 31 that is conspicuous from the outside. Therefore, by adopting this structure, the appearance appearance can be further enhanced.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary. For example, in the above embodiment, the shielding member 17 is fixed to the headrest 16 and attached to the backrest 13 of the chair 1 together with the headrest 16, but the shielding member 17 is not attached to the backrest 13 without attaching the headrest 16 to the backrest 13. You may make it attach to the backrest 13 independently. In the above embodiment, the shielding member 17 is manufactured as a separate component from the backrest 13 and is detachably attached to the backrest 13 as an additional functional component. However, the shielding member is formed integrally with the backrest. You may make it do.

1 chair 17 shielding member (shielding member for chair)
30 Sound insulating plate 31 Exterior member 31A Inner sound absorbing layer 31B Outer sound absorbing layer 31B-f Front layer portion 31B-r Rear layer portion 32 Skin material 33 Slit

Claims (7)

A sound insulating board that is attached to the chair body and functions as a strength member and blocks sound from the back or side of the seated person;
An exterior member covering the outside of the sound insulation board,
In the shielding member for a chair formed in a shape covering the back and left and right sides of the head of the seated person seated on the chair body,
The exterior member has an inner sound absorbing layer that is externally fitted to the sound insulating plate and covers both front and back sides of the sound insulating plate, and an outer sound absorbing layer disposed on the front side and the back side of the inner sound absorbing layer,
The shielding member for a chair, wherein the inner sound absorbing layer is formed at a higher density than the outer sound absorbing layer.   2. The chair shielding member according to claim 1, wherein the inner sound absorbing layer is formed with a slit that opens in a direction intersecting the thickness direction and has substantially the same width as the sound insulating plate.   The sound insulation board is a single member that is curved or bent so as to cover the back and left and right sides of the head of a seated person seated on the chair body, and the inner sound absorbing layer and the slit are The chair shielding member according to claim 2, wherein the chair shielding member is formed in a shape along the sound insulating plate.   Of the outer sound absorbing layer, the front layer portion positioned on the seat occupant side has a shorter extension length in the direction substantially perpendicular to the vertical direction than the rear layer portion positioned on the side opposite to the seat occupant. It forms, The shielding member for chairs of any one of Claims 1-3 characterized by the above-mentioned. The exterior member is covered outside by a skin material,
The outer sound-absorbing layer is configured as a separate member including a front layer portion positioned on the seat occupant side and a rear layer portion positioned on the side opposite to the seat occupant,
Either one of the front layer portion and the rear layer portion of the outer sound absorbing layer is bonded to the inner surface of the skin material, and the other is bonded to the inner sound absorbing layer. The chair shielding member according to any one of 4.   The shielding for a chair according to claim 5, wherein a rear layer portion of the outer sound absorbing layer is bonded to an inner surface of the skin material, and a front layer portion of the outer sound absorbing layer is bonded to the inner sound absorbing layer. Element.   The chair shielding member according to any one of claims 1 to 6 is provided on an upper part of a backrest.

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