CA1132451A - Articles of furniture - Google Patents
Articles of furnitureInfo
- Publication number
- CA1132451A CA1132451A CA356,325A CA356325A CA1132451A CA 1132451 A CA1132451 A CA 1132451A CA 356325 A CA356325 A CA 356325A CA 1132451 A CA1132451 A CA 1132451A
- Authority
- CA
- Canada
- Prior art keywords
- seat
- support
- side portion
- chair
- block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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- Chairs Characterized By Structure (AREA)
Abstract
ARTICLES OF FURNITURE
Abstract Adjustable furniture having a seat and a back and a support component. Two mutually parallel elongate support members on said support component are each passing through a corresponding support sleeve and a downwardly extending slotted opening at the rear side portion of the seat. Said support members extend obliquely upwards at an angle with the horizontal plane of about 30°. A rubber block located at the upper side portion of said slotted opening is providing a friction promoting support of said seat against the associated support member and simultaneously a resilient yielding spring effect between said seat and said support member.
Fig. 3.
Abstract Adjustable furniture having a seat and a back and a support component. Two mutually parallel elongate support members on said support component are each passing through a corresponding support sleeve and a downwardly extending slotted opening at the rear side portion of the seat. Said support members extend obliquely upwards at an angle with the horizontal plane of about 30°. A rubber block located at the upper side portion of said slotted opening is providing a friction promoting support of said seat against the associated support member and simultaneously a resilient yielding spring effect between said seat and said support member.
Fig. 3.
Description
~.~3~2~LSl ARTICI,ES OF F RNITURE
This lnvention relates to articles of furniture of an adjustable kind, such as chairs, as well as stools and similar furniture. Said furniture comprises a suppor-t component provided with a pair of backward inclining elongate tubular members for supporting a seat in adjus-table positions thereat.
At the rear portion of the seat said tubular members are passing through a pair of support sleeves and a pair of slotted openings diverging downwards from said support sleeves. Said slotted openings are allowing the seat to be tilted about a horizontal axis at the rear side portion of the seat by llfting the front side portion thereof.
~ Norwegian Patent Specification No. 135jl~18 discloses adjustable chairs in which a seat can be secured at adjustable levels above the ground at obliquely upwards~and~backwards extending tubular support members by means of support sleeves located at the~rear side portion o~ the seat.;Said support member is provided with a series of holes at the upper side portion thereof whereas the support sleeve is provided with a peg extending downwards from the upper inner side poxtion of the sleeve and into one of said holes. When lifting the front portion of the seat,the sea-t is -til-table in said support sleeve about a hori~ontal axis at the rear side portion of the seat to such an extent that said peg may be lif-ted out of engagemen-t with said hole in its associated support member in order to allow the seat to bé shif-ted to another level by repositioning the peg in another hole of said series of holes. The peg is then secured in its associated hole by means of the weight of the seat and will be additionally secured in place by the weight loading exerted on the seat during use.
Such an arrangement involves several disadvantages.
.~
.
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Firstly, it is difficult to position the series of holes formed in the support members sufficiently tightly together to enable a fine setting of the chair seat relative to the support members. This is ~o-th a functional and economic problem.
In addition, the peg has a -tendency -to scratch up the chromium plate, varnish or other coating on the support members during readjustment of the chair seat on the latter. There is also a problem of metallic noise which occurs readily be-tween the pegs and support members during readjustmen-t of the chair seat as well as during use of the chair.
Thus, there is a need for a simpler constructional solution where the afore-mentioned problems are avoided. The aim is a solution where the readjustment of the chair seat can be effected in, as it were,a step-free manner without me-tallic noise but, nevertheless, in a way which is gentle with respect to the chromium coating, varnish coating or similar coating of the support members and with the possibility for precise adjust-ment in a convenient manner. A further objective is the avoidance of metallic noise during use of the chair.
In c~hairs, such as a chair to be used more or less;conti-nuausl~ for a long period of time, there is a need for a resilient connection between the chair seat and its support c;omponent to avoid unconvenient local pressure from the chair seat against the thigh portions of the user of the chair. It is a further aim of the present invention to provide such resilience between the chair seat and its support members by incorporating such resilience in a block of an elastically yielding, friction promotiny material.
According ~o the present invention an ar-ticle of furnl-ture is characterized in that the support sleeves are made of a slide promoting material, such as plastic material, for allowing the seat to be slided freely along said tubular members with a minimum of friction, in an upwardly tilted position of the seat~and ~ that the upper side portion of said slotted openings spaced from said support sleeves is provided with a block o~
elastically ylelding, ~riction promoting material, such as rubber, and said block is providing a main support surface ~L3;~5~
between said seat and its associated tubular support member and of sufficient thickness to provide a spring effect between said seat and its associated tubular mem~
ber, in a normal downwardly tilted position of the seat.
The solution of the present invention opens up for a simple support member construction without arresting means provided thereon and also for a rather simple chair seat construction. The only arresting means and spring means provided in the chair seat are the rubber blocks located in the slotted openings in the chair seat. These simple constructions further open up for a smooth readjustment of the seat at its support members in a step-free manner without metallic noise as well as they open up for better sitting comfort during use of the chair seat.
In order that the invention can be more cleàrly understood, a convenient embodiment thereof will now be described, by way of example, with reference to the accompanying drawings in which:
Fig. l is a perspective view, as seen partl~ from below, of a chair of the present invention.
. .
Figs. 2 to 4 are vertical sections showing details of the support of the chair seat at an associated support member in three different positions, i.e. in a normal . ~
unloaded chair seat position, in a loaded chair seat position and in an upwardly tilted adjustment position.
Fig. 5 is a sectional view along the line 5-5 in Fig. 2.
; The chair illustrated in Fig. l is a chair of readily dismountable type. The chair is provided with a support component, made up of two U-shaped tubular members lO, ll, and a back 12 and a seat 13. Said back and seat are made of plastic material, each cast in one piece.
A web portion lOa and lla, respectively, of each of said U-shaped tubular members 10, ll~extends horizontally for supporting the chair against the floor or similar ground surface. A first U-shaped member lO, which is ~1~;Z45~l forming the back member of the chair, is provided with two L-shaped leg portions lOb, lOc and lOd, lOe, i.e.
two vertically parallel leg portions lOb and lOd and two obliquely upwardly and forwardly extending, parallel leg portions lOc and lOe. At the outer, upper end of each leg portion lOc and lOe said back 12 is fastened in a permanent grip thereon. In the transition areas, i.e.
in the bends between the leg portions lOb and lOc and ~ between the leg portions lOd and lOe, said U-shaped `~ 10 members 10 and 11 are connected in an easily dismountable manner by means of screw bolts 14 and 15 passing through bores extending transversally of said transition areas and into internal threads of a nut forming fastening means (not shown) secured internally of the outer, upper end of the leg portions llb, llc and lld, lle of the U-shaped member 11. Said U-shaped member 11 is provided with first leg portions llb and lld extending obliquely upwards at an angle with the horizontal plane ~f about 60 and with second leg portions llc and lle extending ~rom said first leg portions obliquely upwards at an angle with t:he hori-zontal plane of about 30. ~ ~
Said second leg portions llc and lle are forming support and sliding portions for supporting the chair seat ` 13. Prior to the mounting together of the two U-shaped ~; 25 members 10 and 11 said leg portions llc and lle are pushed through support sleeves 16 and 17 a~ the rear side portion of the seat 13 and through slotted openings 18 (Figs. 2 to 5) having opposite side portions 18a and 18b diverging downwards from an associated sleeve 16 (17). The lower side portion 18a has a semicylindrical inner surface in alignment with a central bore 16a of the support sleeve whereas the upper side portion 18b is provided with a slotted cavity 19 wherein a rubber block 20 is located.
- Said block 20 is at its inner end provided with a tongue shaped extension 21 which is engaged in a corresponding cavity 22 near the support sleeve 16. At the opposite . .
~ - 5 -end, said block 20 is being secured in its desired position by a clamping plate 23 secured by screws 24.
The rubber block 20 has a main extension longitud-inally of the supporting leg portions llc (lle), i.e. an s extension of from two to three times the diameter of the supporting leg portion llc. The thickness of said block is also of main importance and should be from say 1/4 to 1/2 of the diameter of said leg portion lld in order to -` provide necessary resilience and a desired spring effect 10 when loaded. A rubber quality of from 50 to 80 shore would be satisfactory whereas a rubber quality of 70 shore would be preferred. The support surface 20a of the rubber block, i.e. the surface 20a is arranged to rest against the leg portion llc (lle) in unloaded position (Fig. 2) 15 and in loaded position (Fig. 3), and is in the illustrated embodiment provided with rounded cavity corresponding to the outer surface of the supporting leg portion llc. This ~` cavity is more or less :n alignment with the upper half of the bore of the sleeve 16. However~ a spacing 25 is 20 provided between said support surface 20a of the rubber block 20 and the inner portion of the sleeve 160 This spacing 25 easily enables the support surface 20a of the rubber block 20 to be tilted completeIy out of engagement with the leg portion llc when tilting the chair seat into 25 the position illustrated in Fig. 4, and the seat is free to be readjusted to different positions along the support-ing leg portion llc (lle). However, as soon as the chair seat is released from the position illustrated in Fig. 4, it drops into the position illustrated in Fig. 2 and 30 instantaneously provides a frictional grip between the surface 20a and the abutting leg portion surface. When additional load is exerted on the chair seat during use thereof, an additional frictional grip will be exerted between the two surfaces, and simultaneously the rubber 35 block will be compressed gradually according to the load exerted on the chair seat. If the user exerts additional , 32~LS~l - 5a -load at the outer front end of the chair seat, this will again compress the rubber block additionally, and the user ~ may obtain a certain adjustment o the tilting degree of :~ the chair seat in relation to the chair support compo-nent. This tilting adjustment is based on a spring effect incorporated in the rubber block.
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.
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This lnvention relates to articles of furniture of an adjustable kind, such as chairs, as well as stools and similar furniture. Said furniture comprises a suppor-t component provided with a pair of backward inclining elongate tubular members for supporting a seat in adjus-table positions thereat.
At the rear portion of the seat said tubular members are passing through a pair of support sleeves and a pair of slotted openings diverging downwards from said support sleeves. Said slotted openings are allowing the seat to be tilted about a horizontal axis at the rear side portion of the seat by llfting the front side portion thereof.
~ Norwegian Patent Specification No. 135jl~18 discloses adjustable chairs in which a seat can be secured at adjustable levels above the ground at obliquely upwards~and~backwards extending tubular support members by means of support sleeves located at the~rear side portion o~ the seat.;Said support member is provided with a series of holes at the upper side portion thereof whereas the support sleeve is provided with a peg extending downwards from the upper inner side poxtion of the sleeve and into one of said holes. When lifting the front portion of the seat,the sea-t is -til-table in said support sleeve about a hori~ontal axis at the rear side portion of the seat to such an extent that said peg may be lif-ted out of engagemen-t with said hole in its associated support member in order to allow the seat to bé shif-ted to another level by repositioning the peg in another hole of said series of holes. The peg is then secured in its associated hole by means of the weight of the seat and will be additionally secured in place by the weight loading exerted on the seat during use.
Such an arrangement involves several disadvantages.
.~
.
~3~
Firstly, it is difficult to position the series of holes formed in the support members sufficiently tightly together to enable a fine setting of the chair seat relative to the support members. This is ~o-th a functional and economic problem.
In addition, the peg has a -tendency -to scratch up the chromium plate, varnish or other coating on the support members during readjustment of the chair seat on the latter. There is also a problem of metallic noise which occurs readily be-tween the pegs and support members during readjustmen-t of the chair seat as well as during use of the chair.
Thus, there is a need for a simpler constructional solution where the afore-mentioned problems are avoided. The aim is a solution where the readjustment of the chair seat can be effected in, as it were,a step-free manner without me-tallic noise but, nevertheless, in a way which is gentle with respect to the chromium coating, varnish coating or similar coating of the support members and with the possibility for precise adjust-ment in a convenient manner. A further objective is the avoidance of metallic noise during use of the chair.
In c~hairs, such as a chair to be used more or less;conti-nuausl~ for a long period of time, there is a need for a resilient connection between the chair seat and its support c;omponent to avoid unconvenient local pressure from the chair seat against the thigh portions of the user of the chair. It is a further aim of the present invention to provide such resilience between the chair seat and its support members by incorporating such resilience in a block of an elastically yielding, friction promotiny material.
According ~o the present invention an ar-ticle of furnl-ture is characterized in that the support sleeves are made of a slide promoting material, such as plastic material, for allowing the seat to be slided freely along said tubular members with a minimum of friction, in an upwardly tilted position of the seat~and ~ that the upper side portion of said slotted openings spaced from said support sleeves is provided with a block o~
elastically ylelding, ~riction promoting material, such as rubber, and said block is providing a main support surface ~L3;~5~
between said seat and its associated tubular support member and of sufficient thickness to provide a spring effect between said seat and its associated tubular mem~
ber, in a normal downwardly tilted position of the seat.
The solution of the present invention opens up for a simple support member construction without arresting means provided thereon and also for a rather simple chair seat construction. The only arresting means and spring means provided in the chair seat are the rubber blocks located in the slotted openings in the chair seat. These simple constructions further open up for a smooth readjustment of the seat at its support members in a step-free manner without metallic noise as well as they open up for better sitting comfort during use of the chair seat.
In order that the invention can be more cleàrly understood, a convenient embodiment thereof will now be described, by way of example, with reference to the accompanying drawings in which:
Fig. l is a perspective view, as seen partl~ from below, of a chair of the present invention.
. .
Figs. 2 to 4 are vertical sections showing details of the support of the chair seat at an associated support member in three different positions, i.e. in a normal . ~
unloaded chair seat position, in a loaded chair seat position and in an upwardly tilted adjustment position.
Fig. 5 is a sectional view along the line 5-5 in Fig. 2.
; The chair illustrated in Fig. l is a chair of readily dismountable type. The chair is provided with a support component, made up of two U-shaped tubular members lO, ll, and a back 12 and a seat 13. Said back and seat are made of plastic material, each cast in one piece.
A web portion lOa and lla, respectively, of each of said U-shaped tubular members 10, ll~extends horizontally for supporting the chair against the floor or similar ground surface. A first U-shaped member lO, which is ~1~;Z45~l forming the back member of the chair, is provided with two L-shaped leg portions lOb, lOc and lOd, lOe, i.e.
two vertically parallel leg portions lOb and lOd and two obliquely upwardly and forwardly extending, parallel leg portions lOc and lOe. At the outer, upper end of each leg portion lOc and lOe said back 12 is fastened in a permanent grip thereon. In the transition areas, i.e.
in the bends between the leg portions lOb and lOc and ~ between the leg portions lOd and lOe, said U-shaped `~ 10 members 10 and 11 are connected in an easily dismountable manner by means of screw bolts 14 and 15 passing through bores extending transversally of said transition areas and into internal threads of a nut forming fastening means (not shown) secured internally of the outer, upper end of the leg portions llb, llc and lld, lle of the U-shaped member 11. Said U-shaped member 11 is provided with first leg portions llb and lld extending obliquely upwards at an angle with the horizontal plane ~f about 60 and with second leg portions llc and lle extending ~rom said first leg portions obliquely upwards at an angle with t:he hori-zontal plane of about 30. ~ ~
Said second leg portions llc and lle are forming support and sliding portions for supporting the chair seat ` 13. Prior to the mounting together of the two U-shaped ~; 25 members 10 and 11 said leg portions llc and lle are pushed through support sleeves 16 and 17 a~ the rear side portion of the seat 13 and through slotted openings 18 (Figs. 2 to 5) having opposite side portions 18a and 18b diverging downwards from an associated sleeve 16 (17). The lower side portion 18a has a semicylindrical inner surface in alignment with a central bore 16a of the support sleeve whereas the upper side portion 18b is provided with a slotted cavity 19 wherein a rubber block 20 is located.
- Said block 20 is at its inner end provided with a tongue shaped extension 21 which is engaged in a corresponding cavity 22 near the support sleeve 16. At the opposite . .
~ - 5 -end, said block 20 is being secured in its desired position by a clamping plate 23 secured by screws 24.
The rubber block 20 has a main extension longitud-inally of the supporting leg portions llc (lle), i.e. an s extension of from two to three times the diameter of the supporting leg portion llc. The thickness of said block is also of main importance and should be from say 1/4 to 1/2 of the diameter of said leg portion lld in order to -` provide necessary resilience and a desired spring effect 10 when loaded. A rubber quality of from 50 to 80 shore would be satisfactory whereas a rubber quality of 70 shore would be preferred. The support surface 20a of the rubber block, i.e. the surface 20a is arranged to rest against the leg portion llc (lle) in unloaded position (Fig. 2) 15 and in loaded position (Fig. 3), and is in the illustrated embodiment provided with rounded cavity corresponding to the outer surface of the supporting leg portion llc. This ~` cavity is more or less :n alignment with the upper half of the bore of the sleeve 16. However~ a spacing 25 is 20 provided between said support surface 20a of the rubber block 20 and the inner portion of the sleeve 160 This spacing 25 easily enables the support surface 20a of the rubber block 20 to be tilted completeIy out of engagement with the leg portion llc when tilting the chair seat into 25 the position illustrated in Fig. 4, and the seat is free to be readjusted to different positions along the support-ing leg portion llc (lle). However, as soon as the chair seat is released from the position illustrated in Fig. 4, it drops into the position illustrated in Fig. 2 and 30 instantaneously provides a frictional grip between the surface 20a and the abutting leg portion surface. When additional load is exerted on the chair seat during use thereof, an additional frictional grip will be exerted between the two surfaces, and simultaneously the rubber 35 block will be compressed gradually according to the load exerted on the chair seat. If the user exerts additional , 32~LS~l - 5a -load at the outer front end of the chair seat, this will again compress the rubber block additionally, and the user ~ may obtain a certain adjustment o the tilting degree of :~ the chair seat in relation to the chair support compo-nent. This tilting adjustment is based on a spring effect incorporated in the rubber block.
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Claims (3)
1. An article of furniture of an adjustable kind, such as a chair, especially a child's chair, as well as a stool and similar furniture, comprising a support component provided with a pair of backward inclining elongate tubular members for supporting a seat in adjustable positions thereat, where-as at the rear portion of said seat said tubular members are passing through a pair of support sleeves and a pair of slotted openings diverging downwards from said support sleeves, which slotted openings are allowing the seat to be tilted about a horizontal axis at the rear side portion of the seat by lifting the front side portion thereof, characterized in that the support sleeves are made of a slide promoting material, such as plastic material, for allowing the seat to be slided freely along said tubular members with a minimum of friction, in and upwardly tilted position of the seat, and that the upper side portion of said slotted openings spaced from said support sleeves is provided with a block of elastically yielding, friction promoting material, such as rubber, and said block is providing a main support surface between said seat and its associated tubular support member and of sufficient thickness to provide a spring effect be-tween said seat and its associated tubular member, in a normal downwardly tilted position of the seat.
2. An article according to claim 1, characterized in that said block is made of rubber of from 50 to 80 shore, by preference about 70 shore.
3. An article according to claim 1, characterized in that said block has a thickness radially of the support member of from 1/4 to 1/2 of the radial thickness (diameter) of the support member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA356,325A CA1132451A (en) | 1980-07-16 | 1980-07-16 | Articles of furniture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA356,325A CA1132451A (en) | 1980-07-16 | 1980-07-16 | Articles of furniture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1132451A true CA1132451A (en) | 1982-09-28 |
Family
ID=4117445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA356,325A Expired CA1132451A (en) | 1980-07-16 | 1980-07-16 | Articles of furniture |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1132451A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605200A (en) * | 1984-03-28 | 1986-08-12 | Robert Huppee | Faucet valve |
-
1980
- 1980-07-16 CA CA356,325A patent/CA1132451A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605200A (en) * | 1984-03-28 | 1986-08-12 | Robert Huppee | Faucet valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |