JP2011101770A - Attachment structure of optional member to backrest of chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably and surely attach an optional member to a backrest of a chair with simple structure, to easily adjust an attachment position in a vertical direction of the optional member, and to maintain beautiful appearance of the backrest after detaching the optional member. <P>SOLUTION: On an inner surface in an attachment member 22 which is extended to both sides from a hanger 21 and has an almost inward U shape in planner view so as to surround both side parts of the backrest, an engaging pawl 24 the tip part of which abuts with a front face of the backrest and an abutting piece 25c the tip part of which abuts with a rear face of the backrest in a lower part of the engaging pawl 24 are provided. The tip part of the engaging pawl 24 is press-contacted with the front face of the backrest by a moment according to a downward load of the hanger 21 supported by the tip part of the abutting piece 25c as a fulcrum, so that the attachment member 22 can be engaged to the both side parts of the backrest. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure for attaching optional members to both sides of a backrest of a chair.

  Some conventional chairs have hanger for hanging clothes and optional members such as a headrest attached to the backrest (see, for example, Patent Documents 1 to 5).

JP 2005-245866 A JP 2006-110013 A Japanese Patent No. 3801769 Japanese Patent No. 4146890 Japanese Patent No. 4097186

However, in the conventional chair as described above, the attachment structure for attaching the option member to the backrest is complicated, the installation work is troublesome, and after removing the option member from the backrest, There is a problem that a part of the mounting structure remains and is exposed to the outside, and the appearance is impaired.
In addition, the structure for adjusting the height of the option member with respect to the backrest is complicated, the work is complicated, and there is a problem that it takes time and effort.

  The present invention has been made in view of the above-described problems, and the optional member can be stably and securely attached to the backrest with a simple structure, and the vertical mounting position of the optional member can be easily adjusted. In addition, an object of the present invention is to provide a structure for attaching an optional member to a backrest of a chair so that the appearance of the backrest after the optional member is removed can be kept beautiful.

According to the present invention, the above problem is solved as follows.
(1) Attaching optional members to both sides of the back of the chair In the mounting structure of the optional members to the back of the chair, it extends in both sides from the optional member and is almost in plan view surrounding both sides of the back. A first protrusion whose tip is in contact with either the front or back of the backrest on the inner surface of the U-shaped mounting member, and the tip is backrested below the first protrusion. A second protrusion abutting against the other of the front surface and the rear surface of the first protrusion, and the first protrusion by a moment caused by a downward load of the optional member with the tip of the second protrusion as a fulcrum The front end portion of the mounting member is brought into pressure contact with either the front surface or the rear surface of the backrest so that the mounting member can be engaged with both side portions of the backrest.

With such a configuration, a downward moment about the tip of the second protrusion acts on the mounting member due to the load of the option member itself, so that the tip of the first protrusion is backrested. The optional member is stably and surely engaged with both sides of the backrest and the downward load applied to the optional member becomes larger. Since the pressure contact force against the backrest of the tip of the protrusion is increased and the support strength of the option member is increased, the option member can be stably and reliably held.
In addition, by slightly lifting the option member upward, a moment in the opposite direction to the above acts on the mounting member, and the tip of the first protrusion is separated from the front or rear surface of the backrest, making the option member backrest On the other hand, the optional member can be moved up and down easily, and the optional member can be moved to its position, easily, stably and backed by the above principle by simply releasing the hand from the optional member at any height. Retained.
In addition, after removing the optional member, a part of the mounting structure such as the screw hole does not remain, so that the appearance of the backrest can be kept beautiful.

(2) In the above item (1), the left and right mounting members are connected to the front end of the support frame extending from the option member to both sides.

  With such a configuration, the optional member can be stably held back without wobbling in the left-right direction.

(3) In the above item (1) or (2), an elastic biasing member that is in pressure contact with either the front surface or the rear surface of the backrest is provided above the second protrusion on the inner surface of the mounting member.

  With this configuration, the mounting member can generate a downward moment with the tip of the second protrusion as a fulcrum without relying on the weight of the option member, and the mounting member can be supported reliably. Can be increased.

(4) In the above item (3), a concave groove facing in the vertical direction is provided on one of the back and front surfaces of the backrest to which the elastic urging member is pressed, and the tip of the elastic urging member is formed as the concave groove. Press contact with the bottom of the groove.

  With such a configuration, the elastic urging member is fitted in the concave groove, so that the mounting member can be prevented from being displaced in the left-right direction and rattling with respect to the backrest, and the elastic urging member The amount of deformation can be increased.

(5) In any one of the above items (1) to (4), the front end portion of the first protrusion and the front end portion of the backrest on which the first protrusion abuts are arranged on the back surface. By engaging, a convex portion or a concave portion that prevents the first protrusion from moving downward or upward is provided.

  With such a configuration, the front end portion of the first protrusion can be engaged with the convex portion or the concave portion, thereby preventing the attachment member and the optional member from moving downward or upward relative to the backrest, The optional member can be prevented from sliding down due to vibration or the like.

  According to the present invention, the optional member can be stably and securely attached to the backrest of the chair with a simple structure, and the vertical mounting position of the optional member can be easily adjusted. The appearance of the backrest after removal can be kept beautiful.

It is a side view of one embodiment of a chair to which the present invention is applied. Similarly, it is a rear view. It is also a plan view. It is the disassembled perspective view which looked at the backrest from diagonally forward. It is the disassembled perspective view which looked at the hanger from diagonally forward. FIG. 3 is an enlarged cross-sectional plan view taken along line VI-VI in FIG. 2. It is an expansion vertical side view along the VII-VII line of FIG. FIG. 3 is an enlarged cross-sectional plan view taken along line VIII-VIII in FIG. 2. It is the disassembled perspective view which looked at the attachment part of the hanger from diagonally backward.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 to 3, the chair includes a leg body 3 having five leg rods 2 having a radial shape with a caster 1 at the tip. In the center of the leg 3, a telescopic leg column 4 having a gas spring (not shown) is erected, and the rear part of the support base 5 is fixed to the upper end of the leg column 4.

  The support base 5 has a substantially hollow box shape with an upper surface opened, and the opening on the upper surface is covered with a removable cover 5a.

  Inside the support base 5 is a biasing means for biasing the backrest 6 in the standing direction, that is, forward, and a biasing means for biasing the seat 7 supported by the support base 5 forward ( These are not shown in the drawings, but are not directly related to the present invention, and illustration and detailed description thereof are omitted.

As shown in FIG. 4, the backrest 6 is supported by a pair of left and right backrest support rods 9, 9 having an L-shape in side view, in which intermediate bent portions are connected by a connecting plate 8 facing in the left-right direction. Yes.
The front end portions of the backrest support rods 9 and 9 are pivotally attached to the support base 5 with the left and right shafts 10, and the front and rear ends are connected to the rear end portion of the support base 5 and the connecting plate 8. 11 (see FIG. 1), the backrest support rods 9 and 9 and the backrest 6 can be rotated in the front-rear direction around the shaft 10 or stopped at a desired rearward tilt angle. It has become.

As shown in FIG. 4, the backrest 6 connects the pair of left and right side scissors 12, 12 and both side scissors 12, 12, and the thickness in the front-rear direction is set to the thickness in the front-rear direction of the both side scissors 12, 12. A smaller back plate 13 is provided.
The upper half 13a of the back plate 13 is joined to the front edges of the side hooks 12, 12, and the lower half 13b is joined to the rear edges of the side hooks 12, 12, with a horizontal step between them. A portion (not shown) is formed.
It is preferable that the both side collars 12 and 12 and the back plate 13 are integrally formed of a hard synthetic resin material having elasticity.

  In this way, the backrest 6 is connected to the pair of left and right side scissors 12, 12 and the side scissors 12, 12, and the thickness in the front-rear direction is smaller than the thickness in the front-rear direction of the side scissors 12, 12. Since the strength of both sides of the backrest 6 to which mounting members 22 and 22 of the hanger 21 to be described later are mounted is not lowered, the left and right side scissors 12 and 12 and the backboard are provided. 13 can be integrally formed of the same material, and the back plate 13 can be flexible.

The upper half 13a of the back plate 13 is provided with a number of long holes 14 that are long in the vertical direction in order to increase flexibility.
A large number of ribs 15 are provided on both sides of the front surface of the lower half 13b of the back plate 13 to increase rigidity.

The backrest 6 has an attachment member in which the upper end portions of the left and right backrest support rods 9 and 9 are inserted between the left and right ribs 15 and 15 on the front surface of the lower half portion 13b of the back plate 13, and the illustration is omitted. The connecting plate 8 is fixed to the lower half portion 13b of the back plate 13, and the front surface thereof has a front cover plate 16 which is substantially the same shape as the lower half portion 13b of the back plate 13, and the front surface is the upper half portion of the back plate 13. It is supported by the backrest support rods 9 and 9 while being covered so as to be aligned with the front surface of 13a.
Furthermore, the front surface of the front cover plate 16, the front surface of the upper half portion 13 a of the back plate 13, and the rear surface of the upper half portion 13 a of the back plate 13 are covered with a cushion material 17 that is folded in half.

  A pair of front and rear concave grooves 18 and 19 that are recessed in the rearward and forward directions are provided on the front and rear surfaces of the left and right side bars 12 and 12 in the backrest 6 so as to be aligned with each other in the front-rear direction. As shown in FIG. 6, the horizontal cross section of each side flange 12 in the portion where the concave grooves 18 and 19 are provided is substantially H-shaped.

The upper and lower ends of the front and rear concave grooves 18 and 19 in each side rod 12 are closed by closing pieces 18 a, 18 b, 19 a and 19 b, so that mounting members 22 and 22, which will be described later, are located above the backrest 6. Alternatively, it can be prevented from falling downward.
Note that either one of the upper and lower ends of the grooves 18 and 19 may be opened upward or downward by omitting any one of the upper and lower closing pieces 18a, 18b, 19a and 19b.

On the inner bottom surface of the front concave groove 18, as shown in FIG. 7, a plurality of convex portions 20 having a triangle in a side view whose upper end surface is horizontal are provided at appropriate intervals in the vertical direction.
Instead of the convex portion 20, a plurality of concave portions (not shown) having a triangular triangle in a side view whose lower end surface is horizontal may be used.

  The front and rear grooves 18 and 19 provided on the left and right side rods 12 and 12 are provided with attachment members 22 and 22 provided on both sides of a hanger 21 for hanging clothes, which is an optional member as shown in FIG. By engaging a part, the hanger 21 is attached to the back side of the backrest 6.

  Each mounting member 22 in the hanger 21 extends outward from both side ends of the hanger 21 and surrounds a side end portion of the backrest 6 from the back side to the front side, and an inner corner at the back of the surrounding piece 23 The portion is provided with an elastic member 25 fixed to be detachable with bolts and nuts 25d.

  An engagement claw (first convex portion) 24 having a triangular shape in a side view is provided at the top of the front end of each surrounding piece 23 that wraps around the front surface of each side rod 12 and faces the rear and the bottom is horizontal. The engaging claws 24 are fitted into the concave grooves 18 on the front surface of the side rod 12 and selectively engaged with the plurality of convex portions 20 provided in the concave grooves 18, so that the hangers 21 are arranged in a plurality of heights. At this time, the backrest 6 can be locked.

  As shown in FIGS. 7 to 9, the elastic member 25 includes a mounting portion 25a fixed to the surrounding piece 23 with bolts and nuts 25d, and extends forward and upward from the mounting portion 25a. An elastic tongue piece 25b that fits into the groove 19 and presses against the bottom surface of the groove, and extends forward and downward from the mounting portion 25a, and the front end abuts against the side edge of the groove 19 on the rear surface of each side rod 12. And a contact piece (second convex portion) 25c.

  The front end of the contact piece 25c in the elastic member 25 is in contact with the side edge of the concave groove 19 on the rear surface of each side rod 12, and the elastic tongue piece 25b is fitted in the concave groove 19 on the front surface of the side flange 12. The engagement claw 24 is urged so as to come into pressure contact with the groove bottom surface of the concave groove 18 on the front surface of the side rod 12 by being pressed against the groove bottom surface, and the engagement claw 24 and the elastic tongue in the elastic member 25 are urged. The side flanges 12 are gripped from the front and rear by the pieces 25b and the contact pieces 25c, and the lower edge of the engaging claw 24 is in contact with the upper surface of any of the plurality of convex portions 20 in the concave groove 18. By contacting and engaging, the left and right attachment members 22 and 22 are firmly engaged with the left and right side rods 12 and 12 so as not to be easily lowered, and the hanger 21 is stably and powerfully engaged. I support it.

When the attachment position of the hanger 21 is desired to be adjusted in the vertical direction, the elastic tongue 25b is elastically deformed and resists its urging force so that the hanger 21 has its lower end as shown by a two-dot chain line in FIG. Is used as a fulcrum and is rotated forward or pushed forward.
Then, the engaging claw 24 is rotated forward with the front lower end of the contact piece 25c or the lower end inner edge of the front portion of the surrounding piece 23 as a fulcrum, and is detached from the convex portion 20 forward.
In this state, the entire hanger 21 may be moved upward or downward, and the engaging claw 24 may be engaged with another convex portion 20 either up or down.

When the hanger 21 is moved downward, the engaging claw 24 is naturally engaged with the lower convex portion 20 if the hanger 21 is lowered while returning to the original backward inclined posture.
When the hanger 21 is moved upward, even if the hanger 21 is raised while returning to the original rearward tilting posture, the engaging claw 24 rides on the lower edge of the upper convex portion 20 inclined forward and upward. Once pushed forward, it can be engaged with the upper surface of the convex portion 20.

  In this example, the hanger 21 includes a pair of mounting members 22, 22 mounted on the left and right sides of the backrest 6 as described above, and the backside of the backrest 6 from the two mounting members 22, 22. A pair of support frames 26, 26 extending inward from each other and a pair of slopes extending so as to expand outward from the inner ends of both support frames 26, 26. The upright frames 27 and 27 and the upper frame 28 facing the left and right direction, each of which is connected to the upper ends of the inclined upright frames 27 and 27, are provided. The frame 28 is formed of an elastically deformable material.

Further, below the upper frame 28, both end portions of the auxiliary frame 29 facing in the left-right direction are connected to the left and right inclined standing frames 27, 27.
In this example, the upper frame 28 is curved in an upward arc shape, and the auxiliary frame 29 is curved in a downward arc shape in the rear view, so that the left and right ends of the upper frame 28 and the auxiliary frame 29 Are connected to the upper ends of the left and right inclined standing frames 27, 27 so as to be coupled to each other.

  Further, the central portion of the auxiliary frame 29 is positioned in front of the central portion of the upper frame 28.

  The hanger 21 is formed by integrally molding the surrounding pieces 23 and 23 in the mounting members 22 and 22, the support frames 26 and 26, the inclined standing frames 27 and 27, the upper frame 28, and the auxiliary frame 29 with a hard synthetic resin material. However, it is preferable that only the elastic members 25 and 25 are formed of different materials and are attached to the surrounding pieces 23 and 23 with bolts and nuts 25d.

  In this hanger 21, the mounting members 22, 22 are mounted on the left and right side portions of the backrest 6, so that the stress does not concentrate in the center and is distributed to the left and right, so that the hanger 21 itself wobbles left and right. In addition, clothes and the like can be supported stably, and the left and right attachment members 22, 22 can be reduced in size.

  In addition, when the hanger 21 is mounted on the backrest 6, the back surface shape is unique as if two Z-shapes are face-to-face joined, so that the appearance is good and the hanger 21 is mounted. Since the screw holes and the like do not remain on the backrest 6 not only when the hanger 21 is removed but also when the hanger 21 is removed, the appearance is good.

  Further, since at least the inclined standing frames 27 and 27 and the upper frame 28 are formed of an elastically deformable material, when the upper frame 28 is loaded with clothes or the like, the inclined standing frames 27 and 27 and the upper frame 28 are The frame 28 is elastically deformed, and the left and right support frames 26, 26 use the mounting members 22, 22 as fulcrums, specifically, the tip of the contact piece 25 c of the elastic member 25 contacts the rear surface of the side rod 12. The moment which tries to rotate downward is used as a fulcrum, and the mounting members 22 and 22 are strongly engaged with both sides of the backrest 6 by the moment, and the mounting members 22 and 22 and the backrest 6 There is also an advantage that the bonding strength of is increased.

  Since the upper frame 28 is curved in an upward arc shape, the upper frame 28 is easily bent with respect to a load from above, and the stress can be dispersed.

  Further, since the auxiliary frame 29 is curved in a downward arc shape, accessories such as a tie, a muffler, and a stall can be hung on the auxiliary frame 29, which not only increases convenience. Since accessories of clothes hung on the auxiliary frame 29 are close to the central portion of the auxiliary frame 29, they can be easily taken out even when the upper frame 28 is covered with a jacket.

  In addition, since the center portion of the auxiliary frame 29 is positioned in front of the center portion of the upper frame 28, clothes can be attached to the auxiliary frame 29 even when the upper frame 28 is covered with a jacket. Goods can be easily hung and taken out.

  Since the left and right mounting members 22 are mounted on both sides of the backrest 6 so that the vertical mounting position can be adjusted, the upper frame 28 is level with the upper end of the backrest 6 when the hanger 21 is not used. Alternatively, the hanger 21 does not get in the way by being positioned at a lower position below it, and when the hanger 21 is used, the upper frame 28 is located above the upper end of the backrest 6. By positioning the garment etc. on the hanger 21, it is easy to hang the garment etc. on the hanger 21, and the lower end of the garment etc. can be prevented from sticking to the floor.

  In the example shown in the figure, a pair of left and right armrests 30 and 30 are attached to both side surfaces of the support base 5, but the same thing as that obtained by inverting the mounting member 22 in the front and rear direction is attached to the rear end of this armrest. It is also possible to attach the armrests to the respective side heels 12 in the reverse relation to the above case, and to attach the armrests to both sides of the backrest 6 so that the height can be adjusted.

Thus, as an optional member, in addition to the hanger 21 and the armrest, a headrest, a lumbar support, etc. can be used, and the mounting members 22, 22 provided on either one or a plurality of both side portions thereof can be used. A part of the optional members are engaged with the concave grooves 18 and 19 provided on either of the front and rear sides of the left and right sides of the backrest 6 and attached to the backrest 6 so that these optional members have a simple structure. The optional member can be attached to the backrest 6 in a stable and reliable manner at the same position at any position (height) along the concave grooves 18 and 19. Therefore, it is easy to adjust the mounting position of the option member in the vertical direction.
Moreover, since a part of attachment structure, such as a screw hole, does not remain after removing an option member, the appearance of a backrest can be kept beautiful.
Furthermore, a chair can be diversified by mounting | wearing the backrest with the various optional member from which a function differs individually or in combination.

The present invention is not limited to the above-described embodiment, and can be implemented in various modified modes, for example, as follows.
(1) An optional member is used as an armrest, an auxiliary table, or the like, and attached to the front side of the backrest 6 with a mounting member having a symmetric structure with the mounting member 22 in the above embodiment.

  (2) The operation is performed by omitting one or both of the front and rear concave grooves 18 and 19 in the side rod 12. In this case, the attachment member 22 abuts on the outer side surfaces of the backrests 12 and 12 so that the option member is positioned in the left-right direction with respect to the backrest.

  (3) As an optional member, not only the hanger 21 as in the above embodiment, but also an armrest, an auxiliary table, a headrest, or the like can be used.

  (4) A corner portion of the rear upper edge of each surrounding piece 23 that wraps around the front surface of each side ridge 12 is used as a first convex portion, which is pressed against the front surface of the backrest 6 or the front surface of the backrest 6 Is engaged with a recess provided in the.

(5) The convex portion 20 is omitted, and the engaging claw 24 is fitted into the groove 18 and comes into contact with the groove bottom surface of the groove 18. The engaging claw 24, the elastic tongue piece 25 b in the elastic member 25, and With the contact piece 25c, the hangers 21 are supported only by gripping each side scissors 12 from the front and back.
Or it replaces with the convex part 20, and provides a recessed part in the groove bottom face of the recessed groove 18, so that the front-end | tip part of the engagement nail | claw 24 can be engaged / disengaged to this.

DESCRIPTION OF SYMBOLS 1 Caster 2 Leg 3 Leg 4 Pillar 5 Support 5a Cover 6 Backrest 6a Back plate 6b Cushion body 6c Skin material 7 Seat 8 Connecting plate 9 Back support rod 10 Shaft 11 Gas spring 12 Side rod 13 Back plate 13a Upper half portion 13b Lower half portion 14 Long hole 15 Rib 16 Front cover plate 17 Cushion material 18, 19 Grooves 18a, 18b, 19a, 19b Closing piece 20 Convex portion 21 Hanger (optional member)
22 Mounting member 23 Enclosing piece 24 Engaging claw (first convex portion)
25 elastic member 25a mounting part 25b elastic tongue piece 25c contact piece (second convex part)
26 Support frame 27 Inclined standing frame 28 Upper frame 29 Auxiliary frame 30 Armrest

Claims (5)

An optional member mounting structure on the backrest that attaches the optional member to both sides of the chair backrest,
The front end of the option member abuts on either the front or rear surface of the backrest and the inner surface of the mounting member that extends in both sides from the optional member and surrounds both sides of the backrest and is substantially inwardly U-shaped in plan view. A first protrusion and a second protrusion below the first protrusion, the tip of which abuts against the other of the back and front surfaces of the backrest, are provided, and the second protrusion The mounting member is mounted on both sides of the backrest by pressing the tip of the first protrusion against either the front surface or the rear surface of the backrest by a moment due to the downward load of the optional member having the front end as a fulcrum. A structure for attaching an optional member to a backrest of a chair, characterized in that it can be engaged with a portion.   The mounting structure of the optional member to the backrest of the chair according to claim 1, wherein the left and right mounting members are connected to the distal end portion of the support frame extending to both sides from the optional member.   The optional member for the backrest of the chair according to claim 1 or 2, wherein an elastic biasing member that presses against either the front surface or the rear surface of the backrest is provided above the second protrusion on the inner surface of the mounting member. Mounting structure.   4. A concave groove facing in the vertical direction is provided on one of the front and rear surfaces of the backrest to which the elastic biasing member is pressed, and the tip of the elastic biasing member is pressed against the groove bottom of the concave groove. A structure for attaching an optional member to the backrest of the described chair.   By engaging the tip of the first protrusion with either the front or rear surface of the backrest with which the first protrusion abuts, the first protrusion protrudes downward or upward. The attachment structure of the optional member to the backrest of the chair according to any one of claims 1 to 4, wherein a convex portion or a concave portion is provided to prevent movement.

Images