JP5945114B2 - Chair and optional items attached to it - Google Patents

Description

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

Attaching the optional accessories hanger device such as the backrest of the chair is widely practiced. 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.

Invention of Claim 1 is the structure which has formed the optional article attachment part in the upper end part of the backrest,
At the upper end of the backrest, a hook-like rearward projecting portion is formed such that the front surface of the backrest is continuous with the upper surface of the rearward projecting portion,
The optional product mounting portion is formed in a state straddling both the upper back surface portion of the backrest and the lower surface portion of the rearward projecting portion, and the optional product includes the upper back surface portion and the rearward projecting portion of the backrest. of being arranged such that both ing heavy in the bottom surface portion being adapted to attach to both the lower surface and the backrest of the upper rear portion thereof backward extending portion,
In addition, 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.
The invention of claim 3
"It has a configuration in which an optional product mounting part is formed at the upper end of the backrest,
At the upper end of the backrest, a hook-like rearward projecting portion is formed such that the front surface of the backrest is continuous with the upper surface of the rearward projecting portion,
The optional accessories mounting portion, said from the top rear of the backrest projecting behind direction, the lower surface of the backward extending portion is formed in a state of projecting downward,
The optional product mounting portion is covered with a cover when the optional product is not mounted, and the cover is formed in a tray shape so as to cover the optional product mounting portion from below. "
It is the composition. "
Furthermore, the invention of claim 4
The eaves-shaped rearward extending portion formed on the upper end of the "backrest, the backrest of the upper end portion back to form a sold mounting portion in straddling wants state and the lower surface of the rearward extending portion, the chair configuration that It is an optional product used for
The overlap in straddle wants state to both upper end and back and the lower surface portion of the rearward extending portion of the backrest, engages both of them back upper portion and rear of the lower surface portion of the backward extending portion "
This is the configuration.

In the present invention, since the optional product attaching portion is hidden from the top by the rearward projecting portion, the cover attached 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. easily causes away from the shell, to which the prevent is fixed without Senebanara by bonding or the like to the rear of the back inner shell skin material, this replacement of the skin material together with time-consuming also troublesome in machining is there.

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. In addition, it can be said that it is preferable to hold and 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 XIII-XIII 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. While using the word "longitudinal", "lateral" to identify the direction in the following description, the front and rear left and right wording is based on the person 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), the backrest 6 is a back inner shell 7 made of a resin such as polypropylene, a front cushion 8 strung on the front of this back inner shell 7, the back surface of the back inner shell 7 And a rear cushion 9 and a downwardly-opening bag-shaped skin material 10 that completely covers the back inner shell 7 and the front and rear cushions 8 and 9. 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 10a and rear 10b, are connected the upper end and one side edge integrally, the other side edge is provided with a fastener (not shown). 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, the upper end of the back inner shell 7, rearward extending portion 7a that protrudes rearward is formed. 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. Therefore, the front and rear cushions 8 and 9 also have a rearward projecting portion, and the front surface of the backrest 6 and the upper surface of the rearward projecting portion 6a are continuous in series.

As shown by a one-dot chain line in FIG. 1, a hanger device 12 as an example of an optional product can be attached to the upper end portion of the backrest 6 and the left and right center portion. Therefore, as clearly shown in FIGS. 3B to 5, a hanger attachment portion 13 as an example of an optional product attachment portion is provided at the upper end portion of the back inner shell 7 and at the left and right central portions of the back inner shell 7. It is formed so as to straddle the upper end portion and the lower surface portion of the rearward projecting portion 7a . When the hanger 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 engaging hole 18 is surrounded by a center front rib 22, the front opening of the third to fourth engaging hole 20, 21, the side front rib 23 It is surrounded by. Rear portion of the second engagement hole 19 is positioned 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 from 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 a hanger attachment portion 13. Then, as shown in FIG. 7, in the hanger attachment portion 13, the cover 14 may overlap from behind via the rear skin material 10b. The hanger attachment portion 13 and the cover 14 have an elliptical appearance that is elongated in the left-right direction when viewed from the back.

The hanger attachment part 13 is formed so as to straddle the upper end part of the vertical back surface of the back inner shell 7 and the lower surface of the rearwardly projecting part 7a. Therefore, the rib 24a extending in the vertical direction of the back rib 24 is curved in a side view so as to extend toward the tip of the rearward projecting portion 7a in the back inner shell 7 . That is, as shown in FIG. 4 and part 7, the hanger attachment part is matched with the fact that the lower surface of the rearward projecting part 7 a of the back inner shell 7 and the upper end part of the back inner shell 7 are continuously curved. 13 is curved in a concave state toward the rear 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 rectangular shape when viewed from the front, while the third engagement hole 20 has a reverse convex shape when viewed from the back. (See FIGS. 4 and 9) . The third engagement hole 20 functions as a strength holding portion in attaching the support portion 15 of the hanger device 12, and as shown in FIG. 4, the front portion of the third engagement hole 20 is a side front rib 23. It is reinforced.

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 attachment portion 13 extends from the upper end portion of the back inner shell 7 to the rearward projecting portion 7a, the main body 14a of the cover 14 also has a rearward hook-shaped portion that overlaps the rearward projecting portion 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 full side engaging claws 27 fitted in the fourth engaging hole 21 is forward protruded. 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. Therefore, the rear skin material 10b is in close contact with the rear cushion 9 at the location of the rearward protruding portion 7a.

Accordingly, the outer shape of the rearward projecting portion 7a appears clearly, and the aesthetic 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 at the time of attachment, a hole may be made with a knife or a stab.

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). For details of the hanger device hanger device 12, it is displayed in FIGS. 9 and 10. This point will be described next. As described above , the hanger device 12 has the support portion 15 and the hanger body 16. As shown in FIG. 9B, the support portion 15 includes a base portion 41 fixed to the hanger attachment portion 13 of the back inner shell 7 from behind, and a pressing body 42 attached to the base portion 41 from behind. the has, between the two, the rubber block (Choi last block) 43 is interposed as an example of the elastic body.

The base part 41 has a superposition part 41a that overlaps the hanger attachment part 13 in substantially the same rear view shape as the cover 14, and a support part 41b that protrudes backward from the superposition part 41a. The support part 41b is in rear view. It has a generally rectangular shape and protrudes from both the 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 protrusion 45 that fits in the fitting hole 19 and a side engagement claw 46 that fits in the fourth engagement hole 21 project forward.

Further, as shown in FIG. 9, the overlapping portion 41 a of the base portion 41 is provided with a cylindrical boss body 47 that projects from the rear into the third engagement hole 20 of the hanger attachment portion 13 while projecting forward. In the third engagement hole 20 of the hanger attachment portion 13, a nut 48 with a flange having a T shape in plan view is mounted so as not to rotate. Flanged nut 48, to shifted downward inserted from behind into the third engaging hole 20, and more procedures that are fitted to the third engaging hole 20.

Then, as shown in FIG. 9, by screwing a screw 49 inserted into the boss body 47 from behind into a nut 48 with a flange, the base portion 41 is firmly fixed to the hanger attachment portion 13. Further, the rear surface material 10b, because they are held pressed by the polymerization unit 41a on the back inner shell 7, the rear surface material 10b is held in close contact with the cushion.

As shown in FIG. 10, the support 50 of the hanger body 16 is opened forward, but the opening is a dovetail groove 51 provided with inward lips 51 a on the left and right inner sides, and is supported by the base body 41. The rear end portion of the portion 41 b and the rear end portion of the pressing body 42 are fitted in the dovetail groove 51. Therefore, the support portion 41b of the base member 41, longitudinal grooves 52 of the circle left and right fitting lip 51a of the hanger member 16 is formed. 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 in the front, rear, left and right directions so as not to be detached.

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 from being pulled upward and an upper protrusion 54 that holds the raised hanger body 16 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. Catch piece 55 is adapted to pivot back and forth around the upper end against the elastic, when bent pull it, by removing disconnect the hanger body 16 by disengaging the lower claw 55a from the lower protrusion 53 Can do.

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. For this reason, the hanger body 16 has a backlash. Is held in no 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.

As shown in FIGS. 12 to 14, the upper member 35 is formed with a hook-like rearwardly extending portion 35 a, and the hanger attachment portion 13 is connected to the rear surface of the upper member 35 and the lower surface of the rearwardly protruding portion 35 a. Are integrally formed. The hanger attachment part 13 has a bottom plate 13a . Further, the hanger attachment portion 13 is configured to protrude rearward from the rear of the upper frame member 35, from the lower surface of the rearward extending portion 7a is formed in a box shape which protrudes downward, is open to the front and rear. 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. Further, the bottom plate 13a is provided with a pair of screw insertion holes 37, bis inserted through the screw insertion hole 37, it is 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 37 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 attaching part 13 is provided in the site | part hidden from the top by the backward extension part 35a, even if the cover 14 is arrange | positioned , 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.

Hanger device 12 used in this embodiment, like the hanger 12 of the first embodiment, having a base body 41 and the pressing member 42 and the hanger body 16. 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 (see FIG. 14) is disposed inside. .

Reinforcing brackets 59, enters the upper plate 59a in the inside of the hanger attachment portion 13, the lower plate 59b 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, 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 part 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 also be applied to a chair having a backrest that is configured by stretching a mesh material on a back frame that opens forward and backward. 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 as an Example of Optional Product 13 Hanger Mounting Portion as an Example of Optional Product Mounting Portion 14 Cover 14a Body 15 Support Portion 16 Hanger body
18-21 engagement hole
44 Center engaging claw
45 Positioning protrusion
46 Side engaging claws
48 nuts

Claims (4)

An optional product mounting part is formed at the upper end of the backrest,
At the upper end of the backrest, a hook-like rearward projecting portion is formed such that the front surface of the backrest is continuous with the upper surface of the rearward projecting portion,
The optional product mounting portion is formed in a state straddling both the upper back surface portion of the backrest and the lower surface portion of the rearward projecting portion, and the optional product includes the upper back surface portion and the rearward projecting portion of the backrest. of being arranged such that both ing heavy in the bottom surface portion being adapted to attach to both the lower surface and the backrest of the upper rear portion thereof backward extending portion,
And, the optional product mounting portion is covered with a cover in a state where the optional product is not mounted,
Chair. Both the front surface and the back surface of the backrest are made of a skin material, and the skin material constituting the back surface of the backrest is pressed and held by the cover in a state where the optional product mounting portion is covered with a cover.
The chair according to claim 1. An optional product mounting part is formed at the upper end of the backrest,
At the upper end of the backrest, a hook-like rearward projecting portion is formed such that the front surface of the backrest is continuous with the upper surface of the rearward projecting portion,
The optional accessories mounting portion, said from the top rear of the backrest projecting behind direction, the lower surface of the backward extending portion is formed in a state of projecting downward,
And, the optional product mounting portion is covered with a cover in a state where the optional product is not mounted, and the cover is formed in a tray shape so as to cover the optional product mounting portion from below.
Chair. The eaves-shaped rearward extending portion formed on the upper end of the backrest, the upper end portion rear surface of the backrest forms a sold mounting portion in straddling wants state and the lower surface of the rearward extending portion, to the chair configuration that An optional product used,
Overlap with straddle wants state on both the lower surface of the upper portion back and the backward protruding portion of the backrest, a structure for engaging both of them back upper portion and rear of the lower surface portion of the rearward extending portion is there,
Optional item for chairs.

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