CN2305905Y - Chair capable of piling - Google Patents

Abstract

The utility model relates to a chair capable of piling. The utility model is characterized in that the structures of a chair back and chair legs can be improved, a cross section forms a V shape, and an oblique convex circular arc-shaped face not a semi-circle or a circular face can cause the chair back and the chair legs to increase effectively the structural strength, and can prevent the chair back and the chair legs form bending and deforming. A groove is matched, the chair can be in a plurality of and can be piled mutually, and the storage space can be saved. Thus, the chair has the effects of practicability, accessibility and safe, and the service life can be increased.

Description

Chair capable of piling

The utility model relates to a kind of plastic cement seat, and especially a kind of Chair capable of piling is a structure of improving the chair back and chair pin, make it section and form the oblique convex arc surface of " V " font, but not semi-circular or round, use to make the chair back and chair pin, effectively increase its structural strength, prevent its flexural deformation, cooperate its fit groove, it is in heaps to make it to be a plurality of mutual intussusceptions, to save collection space, so have practicality, convenience and security, and can increase the effect in service life.

Plastic chair is very general, it is one-body molded structure, it is for considering the strength problem of landing weight, all be set as in one-body molded four legs of quadripolar corners periphery, that is, all as shown in Figure 1, it is a chair seat board 10, front end dual-side moulding front chair leg 12, the top, rear end is the chair back 11, chair pin 13 after the dual-side moulding; And be the center of gravity problem of considering that four legs bear gravity, its front chair leg 12 wide A ', width A are and rear foot width B ' before the seat support 10, seat support 10 back width B size differences are little, in case chair pin 13 bendings after during landing; And its chair back 11 and the Section Design of forward and backward chair pin 12,13 become to be semi arch "

" font (shown in figure A-A and B-B); But, but have following shortcoming according to above-mentioned structure kenel:

When 1. it piles up as shown in Figure 2, can only be oppositely stacked by two chairs, cause: two front chair legs, the 12 width A ' of top chair are less than below seat support 10 preceding width A and afterwards chair pin 13 width B ' are less than seat support 10 back width B, and the seat support 10 of two chairs may not pile up it mutually.

2. so traditional wooden chair is can only two chairs oppositely stacked, and can not pile up by a plurality of mutual fits, the time spent is unlimited to reducing shared space.

Although 3., two chairs are oppositely stacked, two chairs also poor in conjunction with strong degree, the especially easier slip of plastic cement material, cause from, as child just being arranged on the side, a kind of especially danger; It is also unbecoming towards the sky during place of business, dining room cleaning floor chair to be placed on the dining table four legs conversely.

4. the chair pin of its semi-circular section, the chair back, when it is subjected to a positive high-tensile strength F, this positive force F must make its chair back produce a reaction force F1 who supports positive force F, and this reaction force F1 must multiply by the angle theta with positive force F, beginning can produce an anti-positive force Fy, cancel out each other with positive force F (is that its pass is F1 * COS θ=Fy), Fy must equal F to reach the balanced action of power, so by this chair back, the section of chair pin is semi-circular its moment L1=L2 that learns, be all radius P (being 1: 1), so, its angle theta=45 ° can be demonstrate,proved, when positive force is excessive, more easily cause the chair pin, the anxiety of chair back flexural deformation is considered.

The purpose of this utility model is to improve above-mentioned shortcoming fully, and make plastic chair under the plane of gravity situation that does not influence the formation of chair pin, reached: 1. can be a plurality of mutual fits and pile up, when not using, reduce its take up space to minimum, and pile up in conjunction with firm, and each opens seat when putting chair cushion, can prevent chair cushion prevent from, better landing comfort is provided.2. make the chair back can obtain bigger anti-positive force, be able to cancel out each other, effectively prevent chair pin, chair back flexural deformation, and reach the balance effect of power with positive force.

For the effect to the utility model is understood fully, conjunction with figs. now is with regard to structure composition, effect and the feature of the utility model, after being described in more detail in.

Fig. 1 is the schematic perspective view of traditional type

Fig. 2 is the schematic diagram that piles up of traditional type

Fig. 3 A is the utility model forward sight stereo appearance figure

Fig. 3 B is the utility model rear perspective outside drawing

Fig. 4 is that the utility model piles up and deposits (A) schematic top plan view (B) schematic side view

Fig. 5 is the enforcement illustration of the utility model

Fig. 6 is another enforcement illustration of the utility model

See also shown in Fig. 3 A, the 3B, the utility model is that one-body molded seat support 41, the chair back 44 constitutes with front chair leg 42, back chair pin 43; Its principal character is: the section of main back of the body bar 440, inferior back of the body bar 441 is all established and is the oblique convex arc surface of " V " font on this forward and backward chair pin 42,43 and the chair back 44, its forward and backward chair pin 42,43 rear sides have fit groove 422,431, these forward and backward chair pin 42,43 seat supports 41 outer rims are provided with flange panel 423, its front chair leg 42 is set as declivity convex surface 421 with seat support 41 joints, and these back chair pin 43 set fit grooves 431 then run through seat support 41; Be the oblique convex arc surface of " V " font by this, but not semi-circular section, can reduce the angle theta 1 of its positive force F and reaction force F1, prop up to effect with the reaction force F1 that reaches the best, and the fit groove 422,431 of its forward and backward chair pin 42,43 is made it to present the effect that several the upper and lower fits of seat pile up.

According to above-mentioned structure, composition,, be described in more detail in the back again with regard to its stress analysis of being born of the utility model and use effect:

1. as follows with regard to the semi-circular section stress analysis of traditional type: shown in Fig. 1 (A-A), when the chair back 11 or chair pin 12, when being subjected to a positive force F on 43, this chair back 44, chair pin 42,43 must produce a reaction force F1 is propped up to positive force F beginning and can make it have an effect of supporting, and this reaction force F1 is because of non-perpendicular with positive force F, still have an angle theta, so, its reaction force F1 must multiply by cosine angle theta value again, and the beginning can produce an anti-positive force Fy, cancelling out each other with positive force F, its pass is: F1 * COS θ=Fy, Fy=F, to reach the balanced action of power, right, be semi-circular its moment L1=L2 that learns by this section, be its radius R, so, its ratio 1: 1, therefore can learn its angle theta=45 °, this F1 * COS45 °= $\mathrm{Fy},\mathrm{Fy}=\sqrt{2}/2\mathrm{<figure-callout\; id="1"\; label="F"\; filenames="9722230700071.png"\; state="\{\{state\}\}">F</figure-callout>}1$ ；

2. it is as follows to be the stress analysis of " V " type section with regard to the utility model: shown in Fig. 3 A (A-A), as the reaction force F1 that it produced, system is identical with the reaction force F1 of traditional type when big or small, be " V " type by its section, can learn its moment L3＜L4, and it is also less by the angle theta 1 of the less length of side of triangle relation correspondence, and equal the relation of 180 degree by Atria interior angle sum, with the one angle be 90 the degree, so, can demonstrate,prove its angle theta 1 and must suppose angle theta 1=30 degree less than 45 °, this F1 * COS30 °=Fy, Fy= $\sqrt{3}/2\mathrm{<figure-callout\; id="1"\; label="F"\; filenames="9722230700071.png"\; state="\{\{state\}\}">F</figure-callout>}1$ ；

So can demonstrate,prove: its anti-positive force Fy=of traditional type by above-mentioned one, two $\sqrt{2}/2F1$ (the anti-positive force Fy=of the utility model $\sqrt{3}/2\mathrm{<figure-callout\; id="1"\; label="F"\; filenames="9722230700071.png"\; state="\{\{state\}\}">F</figure-callout>}1$ )。Therefore, the utility model can obtain bigger anti-positive force, cancels out each other and be able to just bigger positive force, effectively prevents seat flexural deformation, and reaches the balance of power, strengthens the effect of its structural strength.

See also Fig. 4 A, shown in the B, be that all novel the piling up of this reality are deposited schematic diagram, produce the seat of finishing when making, perhaps use the seat of back to desire to pile up when depositing, then chair pin 43 after the seat of top can be inserted on the set fit groove 431 of chair pin after the seat of below 43, the front chair leg 42 of this top seat, 431 of set fit grooves be inserted on the set oblique convex surface 421 of front chair leg of below seat in conjunction with smooth be one, make, following seat can complete smooth fit, and do not disturb the fit of each chair pin, and the rest may be inferred, and the utility model can be many mutual fits of chair and pile up, and can make, following four complete fits of chair pin, do not have (cunning) from anxiety, security is splendid, so chair rocks and has influence on carrying work can avoid carrying the time, and can effectively save parking space, reduce freight and artificial discharging's cost greatly.

In addition, seeing also shown in 5, is the embodiment of the utility model, and these seat support 41 outer rims are provided with several trip grooves 411; In addition, one is provided with the connecting support 5 of several trips 51, and its top is provided with a soft cushion 52, and this connecting support 5 can collude on the trip groove 411 of being located at seat support 41 by its trip 51 according to need becomes one, and is removable, group formula; And on time back of the body bar 441 of its chair back 44, then can with one in be provided with snib groove 72, backrest plate 7 embeddings that posterior edges is provided with grab 71 are colluded and are one; Then can be according to need on this backrest plate 7 engage and be one with soft back pad 8 that a rear side is provided with snib 80; Can arbitrarily be embedded on the seat with soft back pad 8 by this soft cushion 52, backrest plate 7, can reach more comfortable, more meet ergonomics and the effect that can present soft, hard cushion, two kinds of ride effects of back pad, also belong to the scope of the utility model can make seat!

Seeing also shown in Figure 6ly, is another embodiment of the utility model, and this seat can be established the seat support 45 that is square, and before two front chair legs, 42 inboards of its seat support 45 establish one recess 450, side seat support 45 is provided with back recesses 451 within this two backs chair pin 43; By this preceding recess 450 and back recesses 451, when piling up so that the seat that can make square seat support 45 is upper and lower, this forward and backward chair pin 42,43 is sheathed in preceding recess 450 and the back recesses 451, the effect of reach firm fit, not interfering belongs to the scope of the utility model together!

In sum, the utility model has improved the Chair capable of piling structure really, make the section of the chair back and chair pin be the oblique convex arc surface of " V " font, but not the semicircle camber uses to make the chair back and chair pin effectively increase its structural strength, prevents its flexural deformation, cooperate its fit groove, make it to be a plurality of and pile up mutually, to save the collection parking space, so have practicality, convenience and security.

Claims (3)

1. Chair capable of piling, be that one-body molded seat support, the chair back and front chair leg, back chair pin constitutes: it is characterized by: the section of the master's back of the body bar on this forward and backward chair pin and the chair back, inferior back of the body bar is all established and is the oblique convex arc surface of " V " font, its forward and backward chair pin rear side is provided with the fit groove, this forward and backward chair pin and seat support outer rim are provided with the flange panel, its front chair leg and seat support joint are set as the declivity convex surface, and the set fit groove of this back chair pin then runs through seat support; Be the oblique convex arc surface of " V " font by this, but not semi-circular section can reduce the angle of its positive force and reaction force, props up to effect with the active force that reaches the best, and the fit groove of its forward and backward chair pin is made it to present the effect that several the upper and lower fits of seat pile up.

2. Chair capable of piling according to claim 1 is characterized in that, this seat support outer rim is provided with several trip grooves; One is provided with the connecting support of several grabs, and its top is provided with a soft cushion, and this connecting support can collude on the grab groove of being located at seat support by its grab according to need becomes one, and is removable, group formula; And on time back of the body bar of its chair back, then can with one in be provided with the snib groove, the backrest plate embedding that posterior edges is provided with grab is colluded and is one; Then can be according to need on this backrest plate engage and be one with soft back pad that a rear side is provided with snib; This soft cushion, backrest plate and soft back pad can arbitrarily be embedded on the seat.

3. Chair capable of piling according to claim 1 is characterized in that, this seat can be established the seat support that is square, and before the two front chair leg inboards of its seat support establish one recess, the side seat support is provided with back recesses within this two backs chair pin; By this preceding recess and back recesses, can make that the square seat support is upper and lower to be piled up.

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