JP2016147201A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair that has excellent support strength in a hanger device and also allows a cover to be used in attaching skin materials of the hanger device to be inconspicuous as much as possible.SOLUTION: A backrest 6 includes a back inner shell 7 and front and rear cushions 8, 9. The front and rear cushions 8, 9 are covered by skin materials 10a, 10b. A backward swelling part 7a is formed at the upper end of the back inner shell 7. A hanger attachment part 13 is formed at a portion hidden by the backward swelling part 7a. When a hanger device is not attached, the hanger attachment part 13 is clogged by a cover 14. Since the backward swelling part 7a shows a rib effect, the hanger support strength of the hanger attachment part 13 is increased. Besides, the cover 14 is hidden by the backward swelling part 6a, so as to provide excellent outer appearance.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a chair to which an optional item such as a hanger device can be attached to the backrest. Here, the optional items include a headrest, a luggage lowering hook (or a basket) and the like in addition to the hanger device.

  It is widely practiced to attach optional items such as a hanger device to the back of a chair. There are various attachment structures for the optional product. However, when the optional product is attached to the back of the backrest, the attachment part such as a screw hole is exposed and the appearance is impaired when the optional product is not attached. Therefore, Patent Documents 1 and 2 disclose that the optional product mounting portion is covered with a cover in a state where the optional product is not mounted.

JP-A-11-155690 JP 2004-159747 A

  By the way, it can be said that it is preferable that the back of the backrest be as clean as possible even when the optional product is not attached. In this regard, both Patent Documents 1 and 2 can prevent exposure of the optional product mounting portion in the state where the optional product is not mounted, but the optional product mounting portion is provided in a part of the back of the backrest that touches the human eye. There is a risk that the cover will stand out when the optional product is not installed.

  The present invention has been made in view of such a situation, and an object thereof is to improve the aesthetics so that the cover itself covering the optional product mounting portion is not conspicuous.

  The present invention has a configuration in which an optional product mounting part for mounting a hanger device or a headrest or other optional product is provided on the upper back surface of the backrest, and an upper end of the backrest has a hook-like rearward projecting portion, The optional product mounting portion is provided in a portion hidden by the rearward projecting portion, and the optional product mounting portion is covered with a cover when the optional product is not mounted.

  The present invention also includes the structure of claim 2. The invention according to claim 2 is the invention according to claim 1, wherein both the front surface and the back surface of the backrest are formed of a skin material, and the back surface of the backrest is configured in a state in which the optional product mounting portion is covered with a cover. The skin material to be pressed is held by the cover.

  In the present invention, since the optional product mounting portion is provided in a portion hidden by the rearward projecting portion, the cover to be mounted when the optional product is not used is not conspicuous, and thus the aesthetics can be improved. Moreover, since the strength of the upper part of the backrest can be increased by the rib effect of the rearward projecting portion, the support strength of the optional product can also be improved. Furthermore, the rearward projecting portion can function as a grip portion when a person moves the chair, and therefore has an advantage that the chair can be easily gripped and moved.

  For example, the backrest of a swivel chair often used in offices or the like often has a structure in which a cushion is placed on the front surface of a resin inner back shell and covered with a skin material. The material is formed into a bag shape to cover the back inner shell and the cushion completely. Adopting this configuration has an advantage of ensuring design uniformity.

  And, if the skin material is formed in a bag shape by providing a backward projecting part at the upper end of the backrest, the skin material has the property of being flat when pulled, so the skin material is located at the lower part of the backward projecting part. To prevent this from happening, it is necessary to fix the skin material to the back of the back inner shell, etc., but this requires time and effort to replace the skin material. .

  On the other hand, when the invention of claim 2 of the present application is adopted, the skin material is pressed and held by the inner member such as the back inner shell by the cover even if a rearward projecting portion is provided at the upper end of the backrest. It is excellent in aesthetics because it can be held firmly on the member. Note that it is preferable to hold the skin material on the internal member with the optional product in order to hold the skin material on the internal member even when the optional product is attached.

It is an external view of the chair which concerns on 1st Embodiment, (A) is a front view, (B) is a side view. (A) is a top view of a chair, (B) is a rear view of a chair. (A) is the whole perspective view of a back inner shell, (B) is the fragmentary perspective view which looked at the upper part of the back inner shell from the front. It is the isolation | separation perspective view which looked at the back inner shell and the cover from back. It is the isolation | separation perspective view which looked at the back inner shell and the cover from the front. It is a perspective view of the principal part. It is a center part vertical side view of the principal part. It is a separation front view of a back inner shell and a cover. (A) is a separated perspective view of a back inner shell and the whole hanger device, (B) is a separated perspective view of a back inner shell and a part of hanger device. (A) (B) is a separation perspective view of a hanger device. It is a separation perspective view of the backrest concerning a 2nd embodiment. It is a separation perspective view of the important section of a 2nd embodiment. FIG. 13 is a sectional view taken along line XX in FIG. 12. (A) is a separated perspective view of a part of hanger device and a back frame, (B) is a top view of a hanger device.

  Next, an embodiment of the present invention will be described with reference to the drawings. In the following description, the words “front and rear” and “left and right” are used to specify the direction, but the words on the front and rear and right and left are based on the person who is seated. The front view direction is the direction facing the seated person, and therefore the left and right in the front view are opposite to the left and right viewed from the seated person.

(1). Outline of First Embodiment First, the first embodiment will be described with reference to FIGS. This embodiment is applied to a swivel chair frequently used for office work or the like. The chair includes a leg device 3 having a leg column 1 and casters 2, a base 4 fixed to the upper end of the leg column 1, and a base 4 And a backrest 6 on which a seated person can rest. The backrest 6 is attached to a back frame 2a connected to the base 2 so as to be tiltable backward.

  For example, as shown in FIG. 1 (A), a backrest 6 includes a back inner shell 7 made of resin such as polypropylene, a front cushion 8 stretched on the front surface of the back inner shell 7, and a back surface of the back inner shell 7. The rear cushion 9, the back inner shell 7, and the front and rear cushions 8, 9 that completely cover the back inner cushion 7 and the front and rear cushions 10 are provided. The front cushion 8 and the rear cushion 9 may be integrally attached to the back inner shell 7 by insert molding, or may be stacked on the back inner shell 7 after cutting out a sheet-like material.

  The skin material 10 has a front portion 10 a that overlaps the front cushion 8 and a rear portion 10 b that overlaps the rear cushion 9. The front portion 10a and the rear portion 10b are integrally connected at the upper end and one side edge, and a fastener (not shown) is provided on the other side edge. A fastener (not shown) is also provided in the opening at the lower end.

  For example, as shown in FIG. 4, a number of reinforcing ribs 11 are provided on the back surface of the back inner shell 7. Further, a rearward projecting portion 7 a that projects rearward is formed at the upper end of the back inner shell 7 of the back inner shell 7. Therefore, a rearwardly projecting portion 6 a also exists at the upper end of the backrest 6. The front and rear cushions 8, 9 overlap the rearward projecting portion 7 a of the back inner shell 7.

  And as shown by a dashed-dotted line in FIG. 1, the hanger apparatus 12 as an example of an option goods can be attached to the upper end part of the backrest 6, and the left-right center part. Therefore, as clearly shown in FIGS. 3B to 5, a hanger mounting portion 13 is formed as an example of an optional product mounting portion at the upper end portion of the back inner shell 7 and at the left and right central portions. When the device 12 is not attached, the hanger attachment portion 13 is covered with a cover 14.

  The hanger device 12 of this embodiment includes a support portion 15 fixed to the hanger attachment portion 13 and a substantially T-shaped hanger body 16 that is mounted on the support portion 15 so as to be movable up and down. The support column 15 is held up and down by the support unit 15. Details of the hanger device 12 will be described later.

(2). Hanger device attaching portion and cover As shown in FIGS. 3 (B) to 5 and 8, the hanger attaching portion 13 is located at the left and right central portion and is open to the front and rear. 18, a pair of left and right second engagement holes 19 positioned on the left and right outer sides and opening rearward, and a pair of left and right third engagement holes positioned on the outer side of the second engagement hole 19 and opened in the front-rear direction. It has a hole 20 and a pair of left and right fourth engagement holes 21 that are located on the left and right outer sides of the third engagement hole 20 and open forward and backward.

  As shown in FIG. 5, the front opening of the first engagement hole 18 is surrounded by a center front rib 22, and the front openings of the third to fourth engagement holes 20, 21 are side front ribs 23. Surrounded. The rear portion of the second engagement hole 19 is located between the center front rib 22 and the side front rib 23. On the other hand, at the rear portion of the back inner shell 7, the group of the engagement holes 18 to 21 is partitioned by the group of the back ribs 24.

That is, the engagement holes 18 to 21 are formed by opening the back inner shell 7 and forming the ribs 22 to 24 (the ribs may be formed only on the rear surface). The rear rib 24 protrudes to the left and right outer sides of the fourth engagement hole 21, and a portion surrounded by the rear rib 24 and the rearward projecting portion 7 a is the hanger attachment portion 13. And the cover 14 can overlap with this hanger attachment part 13 from the back via the rear skin material 10b. The hanger attachment portion 13 and the hanger device 14 have an elongated elliptical appearance in the left-right direction when viewed from the back.

  The hanger attachment portion 13 is formed so as to straddle the upper end of the vertical back surface of the back inner shell 7 and the rearward projecting portion 7a. Therefore, the rib 24a extending in the vertical direction among the rear ribs 24 is curved in a side view so as to extend toward the tip of the rearward projecting portion 7a. That is, the hanger attachment portion 13 is curved in a concave state toward the rear and lower side in a side view. Due to the presence of the ribs 22, 23 and 24, the strength at the location of the hanger attachment portion 13 is remarkably high.

  The first engagement hole 18, the second engagement hole 19, and the fourth engagement hole 21 each have a substantially square shape when viewed from the front, while the third engagement hole 21 is reverse convex when viewed from the back. The third engagement hole 21 functions as a strength holding portion in attaching the support portion 15 of the hanger device 12, and the front portion of the third engagement hole 20 is reinforced with side front ribs 23 as shown in FIG. 4. Has been.

  The cover 14 has a main body 14 a that overlaps the hanger attachment portion 13 of the back inner shell 7. Since the hanger attaching part 13 extends from the upper end of the back of the back inner shell 7 to the rearwardly projecting part 7a, the main body 14a of the cover 14 also has a rearward saddle-like part 27a that overlaps the rearwardly projecting part 7a from below.

  On the main body 14 a of the cover 14, one center engaging claw 25 that fits into the first engaging hole 18 of the hanger attaching portion 13, and a positioning protrusion 26 that is reversely convex in front view and fits into the second engaging hole 19. A side engagement claw 27 that fits into the fourth engagement hole 21 protrudes forward. An upward claw portion 25 a is formed at the front end of the center engaging claw 25, and a center locking portion 28 on which the upward claw portion 25 a is hooked is formed in the first engagement hole 18. The positioning protrusion 26 is merely fitted in the second engagement hole 19 and does not have a hooking function. On the other hand, a downward claw portion 27a is formed at the front end of the side engagement claw, and as can be understood from FIG. 5, the downward engagement claw portion 27a of the side engagement claw 27 is formed in the fourth engagement hole 21. A side locking portion 29 to be caught is formed.

  As shown in FIG. 7, a cutout portion 30 is formed in a portion corresponding to the hanger attachment portion 13 in the rear cushion 9, and the cover 14 is disposed in a state where the rear skin material 10 b is pressed. For this reason, the rear skin material 10b is in close contact with the rear cushion 9 at the location of the rearward protruding portion 7a.

  Therefore, the outer shape of the rearward projecting portion 7a appears clearly, and the appearance is excellent. When attaching the cover 14, the engaging claws 26 and 27 and the positioning projections 26 are penetrated through the rear skin material 10b. However, holes corresponding to the engaging claws 26 and 27 and the positioning projections 26 are provided in the rear skin material 10b in advance. It may be left open, or a hole may be made with a knife or a stab when attaching.

  When attaching the hanger device 12, the support portion 15 may be overlaid on the rear skin material 10b, and the foot portions that fit into the respective engagement holes 18 to 21 may be passed through the rear skin material 10b. You may cut it out. The support portion 15 of the hanger device 12 has substantially the same rear view shape as the cover 14. For this reason, even when the hanger device 12 is attached, the rear skin material 10 b is in close contact with the rear cushion 9.

(3) Hanger device Details of the hanger device 12 are shown in FIGS. This point will be described next. As described above, the hanger device 12 has the support portion 15 and the hanger body 16. And as shown in FIG. 9 (B), the support part 15 is a hanger attachment part 13 of the back inner shell 7.
The base part 41 is fixed to the base part 41 from behind, and the pressing body 42 is attached to the base part 41 from the rear side. Is intervening.

  The base portion 41 includes a superposed portion 41a having substantially the same rear view shape as the cover 14, and a support portion 41b protruding rearward from the superposed portion 41a. The support portion 41b has a substantially rectangular shape in the rear view. , And protrudes on both upper and lower sides of the overlapping portion 41a. As shown in FIG. 9B, from the front surface of the overlapping portion 41a, similarly to the cover 14, one center engaging claw 44 that fits in the first engaging hole 18 of the hanger attaching portion 13 and the second engaging portion. A rectangular positioning projection 45 that fits in the fitting hole 19 and a side engagement claw 46 that fits in the fourth engagement hole 21 project forward.

  Furthermore, a cylindrical boss body 47 that fits from behind into the third mounting hole 20 of the hanger mounting portion 13 is projected forward on the overlapping portion 41a of the base portion 41, while the third mounting of the hanger mounting portion 13 is performed. In the hole 20, a nut 48 with a flange having a T shape in a plan view is mounted so as not to rotate. The flanged nut 48 is fitted into the third mounting hole 20 by a procedure of inserting it into the third mounting hole 20 from behind and shifting it downward.

  Therefore, the base portion 41 is firmly fixed to the hanger attachment portion 13 by screwing the screw 49 inserted into the boss body 47 from behind into the nut 48 with the flange. Further, since the rear skin material 10b is pressed and held on the back inner shell 7 by the overlapping portion 41a, the rear skin material 10b is held in close contact with the cushion.

  As shown in FIG. 10, the support 50 of the hanger body 16 is open forward, but the opening is a dovetail groove 51 provided with inward lips 51 a on the left and right inner sides, and the support portion of the base body 41 The rear end portion of 41 b and the rear end portion of the pressing body 42 are fitted in the dovetail groove 51. Therefore, left and right vertical grooves 52 into which the lip 51a of the hanger body 16 is fitted are formed in the support portion 41b of the base body 41. Moreover, the flap 42a which fits inside the lip 51a is formed in the right-and-left both ends of the press body 42. As shown in FIG. For this reason, the hanger body 16 can be moved up and down and is held so as not to be disengaged from front to back and from side to side.

  On the inner bottom surface of the dovetail groove 51 in the hanger body 16, there are provided a lower protrusion 53 that prevents the hanger body 16 cover 14 from being pulled upward, and an upper protrusion 54 that holds the hanger body 16 that has been lifted so as not to descend. . On the other hand, the pressing body 42 is provided with a downward tongue-like catch piece 55, and the catch piece 55 is provided with a lower claw 55 a that the lower projection 53 hits from below and an upper claw 55 b that the upper projection 54 hits from above. Yes. The catch piece 55 pivots back and forth around the upper end against elasticity, and when it is bent forward, the lower claw 55a can be detached from the lower projection 53 and the hanger body 16 can be removed. .

  The holder 42 is fitted in a recess 56 of a rearward opening provided in the base portion 41 and is held so as not to be displaced in the vertical direction and the horizontal direction. Further, forward-facing bending engagement claws 57 are provided on the left and right sides of the pressing body 42, while the bending engagement claws 57 are engaged with the left and right inner surfaces of the recess 56 in the base portion 41 by deformation against elasticity. Engaging projections 58 are provided. Since the rubber block 43 is interposed between the base portion 41 and the pressing body 41, the rear surfaces of the left and right side portions of the pressing body 42 are stretched against the hanger body 16, so that the hanger body 16 is not loose. Held in a state.

(4). Second Embodiment Next, a second embodiment shown in FIGS. The backrest 6 of this embodiment is composed of a back frame 32 that opens in the front-rear direction, and a resin back sheet 33 that is integrally provided on the back frame 32 by insant molding. In this embodiment, the backsheet 33 remains exposed. The back frame 32 includes left and right side members 34, an upper member 35 integrally connected between the upper ends of the side members 34, and a lower member 36 integrally connected between the lower ends of the side members 34. As shown in FIG. 11, a hole 33 a for exposing the hanger attachment portion 13 is opened backward in a portion of the backsheet 33 that holds the upper member 35.

  The upper member 35 is formed with a rearward projecting portion 35a, and the hanger attachment portion 13 is integrally formed with a hook-shaped rearward projecting portion 35a. The hanger mounting portion 13 has a bottom plate 13a, and is formed in a box shape that protrudes rearward from the back surface of the upper member 35 and protrudes downward from the lower surface of the rearward protruding portion 7a. . Moreover, the inside of the hanger attachment part 13 is divided into a plurality of right and left parts by a group of ribs, and a foot part provided on the support part of the hanger device is inserted into a space partitioned by these ribs. The bottom plate 13a is provided with a pair of left and right screw insertion holes 37, and the screws inserted into the screw insertion holes 37 are screwed into the support portion of the hanger device.

  The cover 14 of this embodiment is formed in a substantially tray shape so as to cover the hanger attachment portion 13 from below. As a means for preventing the cover 14 from coming off, for example, an engaging claw that fits into the screw insertion hole may be provided. Alternatively, it is possible to insert a nut into the hanger attachment portion 13 and screw a screw that penetrates the cover 14 into the nut.

  Also in this embodiment, since the hanger attachment part 13 is provided in the site | part hidden by the backward extension part 32a, even if it arrange | positions the cover 14, the cover 14 does not stand out. For this reason, it is excellent in aesthetics. Further, since the upper member 35 has an L-shaped cross section by providing the rearwardly extending portion 35a, the strength of the upper member 35 is high and the support strength of the hanger device is also excellent.

  The hanger device 12 used in this embodiment includes a base body 41, a pressing body 42, and a hanger body 16 in the same manner as the hanger device 12 of the first embodiment. The relationship between the base body 41, the pressing body 42, and the hanger body 16 is the same as that of the hanger device 12 used in the first embodiment, but the structure of the base body 41 is different from that of the first embodiment. That is, in the base body 41 of this embodiment, the overlapping portion 41a is formed in substantially the same shape as the cover 14, and a U-shaped reinforcing metal fitting 59 is disposed in the inside thereof.

  The reinforcing metal plate 59 has an upper plate 59 a that enters the inside of the hanger attachment portion 13, and a lower plate 59 b that overlaps the lower surface of the hanger attachment portion 13. Then, by screwing the upper screw 60 inserted from above into the overlapping portion 41a of the base body 41 into the reinforcing bracket 59, the reinforcing bracket 59 and the base body 41 are fixed, and inserted into the overlapping portion 41a from below. The lower screw 61 passes through the lower plate 59b of the reinforcing metal fitting 59 and the lower portion of the hanger attachment portion 13 and is screwed into the upper plate 59a of the reinforcing metal fitting 5). Naturally, the lower screw 61 is fitted in the screw insertion hole 37 of the hanger attachment portion 13.

(5). Others The present invention can be embodied in various ways other than the above embodiment. For example, the present invention can be applied to a chair in which a mesh material is stretched on a back frame that is open at the front and rear. Various forms of the hanger device can be adopted, for example, a form having two right and left columns. Needless to say, the present invention can be applied to a chair whose backrest does not rock.

  The present invention can be embodied in a chair. Therefore, it can be used industrially.

6 Backrest 7 Back inner shell 8 Front cushion 9 Rear cushion 10 Skin material 10b Rear skin material 12 Hanger device 13 Hanger attachment part 14 Cover 14a Body 15 Support part 16 Hanger body

Claims (1)

A configuration in which an optional product mounting portion for mounting a hanger device or a headrest or other optional product is provided on the upper back surface of the backrest,
The upper end of the backrest has a hook-like rearward projecting portion, and the optional product mounting portion is provided in a portion hidden by the rearward projecting portion, and the optional product mounting portion is in a state where the optional product is not mounted. Then it is covered with a cover,
Chair.

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