JP5676239B2 - Chair with backrest - Google Patents

Description

  The present invention relates to a chair provided with a handle function on a backrest.

When a person pulls and moves a chair by hand, he or she pulls with his hand on the top of the backrest. In general, the upper end of the backrest is grasped by hand and pulled. However, when the skin material to the backrest is stretched, while you are against repeated hand to the upper end of the backrest, there is that the skin material will dirty.

On the other hand, it has been proposed or proposed to provide a handle at the upper end of the backrest. As an example, Patent Document 1 discloses that a handle made of a horizontally long bar-like material is attached to the back of a backrest. In addition, as disclosed in FIG. 8 of Patent Document 1, a handle hole having front and rear openings is formed at the upper end of the back plate.

JP 2006-136570 A

  The configuration of Patent Document 1 has no problem in terms of the pulling function, and is a separate member from the backrest. Therefore, there is no problem of contamination even if a skin material is stretched on the surface of the backrest. However, since the handle is attached in a state of protruding from the back of the backrest, there is a possibility that it may give a person a sense of incongruity, and it cannot always be said that the aesthetic sense is excellent.

  This invention makes it a subject to improve such a present condition.

In order to solve the above-mentioned problem, the chair according to the invention of claim 1
The top of the rear portion of the backrest, the tab hole human can insert the hand from below, in the configuration that are disposed so as to open downwardly without opening in the longitudinal direction and upward, the backrest, the squab on the front It has a stretched shell-like back plate and an outer shell disposed behind the back plate, and a rearward projecting portion is formed at the upper end portion of the outer shell with the handle hole opened downward. A rear plate is formed at the rear end of the rearward projecting portion so that the finger inserted into the handle hole can be applied thereto.

According to a second aspect of the present invention, in the first aspect, the handle hole is also opened in the left-right direction.

According to a third aspect of the present invention, in the first or second aspect, the upper portion of the back plate overlaps the outer shell.

Pull holes of the present invention, since the front and rear direction and the upper have downwardly opening does not open, no discomfort to a person never conspicuous pull holes. That is, the handle hole can be provided in a state of being melted into the design, and therefore, the backrest can be excellent in aesthetics. In addition, since the inner surface of the handle hole is not touched by human eyes, even if the handle hole becomes dirty, the aesthetics do not deteriorate. Therefore, it is suitable for the backrest with the skin material.

Further, since is only set this to pull the hole to form a backward projecting portion is a can with good applied in preventing the whole of the back is increased. In addition, the outer shell is a strength member and has a strong structure, so it has excellent strength. Therefore, for example, it is possible to lift the chair by placing a hand on the handle hole.

In addition to the configuration of claim 3, as in the embodiment, Uto covering from behind the backward protrusion of the outer shell behind the wall portion of the back plate, due to the formation of the backward protruded portion to the outer shell There is no problem that deteriorates aesthetics.

It is the external view of a chair, (A) is the perspective view seen from the front, (B) is the perspective view seen from back, (C) is a side view. It is a separation perspective view of a chair. It is the external view of the backrest in the state which abbreviate | omitted the cushion, (A) is the perspective view seen from the front, (B) is a side view, (C) is the perspective view seen from back. (A) is the perspective view which looked at the back part of the backrest from the lower part, (B) is the separation side view of the backrest. It is the isolation | separation perspective view which looked at the backrest from back. It is the isolation | separation perspective view which isolate | separated the component of the backrest and was seen from the back. (A) and (B) are separation perspective views of a backrest. It is the front view which turned the main member over and arranged with the back support. (A) is a separated perspective view of the main member and the back support, (B) is a partial perspective view of the lower part of the back support, and (C) is a partial perspective view of the lower part of the main member. (A) is a partial rear view of the main member, (B) is a partial perspective view of the main member as seen from the rear, (C) is a partial front view of the end of the cushion, and (D) is a plan view showing how the cushion is attached. It is sectional drawing. (A) is a partial front view of the back support, (B) is a partial perspective view of the back support as seen from the front, (C) is a partial front view of the end portion of the back seat, and (D) is an attachment mode of the back seat. FIG. (A) (B) is the isolation | separation perspective view of the principal part. (A) is the isolation | separation figure which cut | disconnected the backrest in the left-right center part, (B) is a perspective view of a coupling. (A) is a sectional side view of the backrest at the left and right center, (B) is a perspective view of the side end of the top member, and (B) is a bottom view of the side end of the top member.

  Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment is applied to a rotary rocking chair that is frequently used for office work. In this application, the words “front and rear” and “left and right” are used to specify the direction, which is based on the direction of a person seated in a normal posture. The front view is in the direction facing the seated person.

(1). Outline of Chair First, an outline of a chair will be described with reference mainly to FIGS. As shown in FIG. 1, the chair includes a leg 1, a seat 2, and a backrest 3 as major elements. Although the leg 1 has branch legs extending in the radial direction, the illustration is omitted, and only the leg support 4 made of a gas cylinder is shown. Although not shown, a caster is provided at the tip of each branch leg constituting the leg 1, so that the chair can be easily pushed and pulled. A base 5 is fixed to the upper end of the leg column 4, and a seat 2 is disposed above the base 5.

As shown in FIG. 2, the seat 2 is formed of a resin seat inner shell (seat plate) 6 and taut seat cushion 7 for the upper surface thereof, the intermediate support 8 shown in FIG. 2, adjusted longitudinal position Installed as possible. The front portion of the intermediate support 8 is connected to the front portion of the base 5 via the front link 9, and the front link 9 rotates relative to both the base 5 and the intermediate support 8 in a side view. . Therefore, when the front link 9 rotates, the intermediate support 8 and the seat 2 move back and forth while moving up and down.

The backrest 3, Scholl-like backplates body pressure of a seated person such as (back inner shell) 10, which has a back outer shell 11 attached, back cushion 12 is Zhang in front of the back plate 10 It has been. Hereinafter, the back outer shell is referred to as a back support. The back cushion 12 is covered with a skin material 13 such as a cloth from the front. As best shown in FIG. 2, the back plate 10 is composed of a back main members 14 disposed in front of the support 11, two members of the top members 15 arranged superimposed thereon (Parts) ing. Both members 14 and 15 are injection molded products made of resin.

The upper end of the backrest 3, the overhang portion 3a that protrudes rearward is formed over the lateral length. For this reason, as for the backrest 3 , the site | part of the overhang part 3a is thicker than the site | part below it. In the present embodiment, the main member 14 occupies most of the backrest 3, and the top member 15 constitutes the upper portion of the backrest 3.

And the front face of the front and top members 15 of the main member 14, is continuous with the smooth Laka. Accordingly, the seated person can hang on without feeling discomfort, like the backrest of the monolithic structure. The top member 15 of the present embodiment has a shape that bends backward and makes a U-turn downward, and thus has a side-view configuration that is approximately close to a downward opening U-shape.

  The upper end of the main member 14 and the upper end of the back support 11 in the back plate 10 are substantially the same height, and the top member 15 of the back plate 10 overlaps the upper surface of the back support 11. The top member 15 of the back plate 10 is overhanging so as to go around the upper back of the back support 11.

As clearly shown in FIG. 3, a pair of left and right arms 16 extending forward are integrally formed at the lower end of the back support 11, and the left and right arms 16 are connected by a gate-shaped joint 17. The left and right arms 16 is connected to the base 5 so as to tilted backward around the front end portion thereof, and the left and right arms 16, bracket 18 (slightly exposed in FIG. 1 (B) It is.) is connected to the rear of the intermediate support 8 through. For this reason, when the backrest 3 is tilted backward, the intermediate support 8 (seat 2) is pulled by the metal fitting 18 and moves upward while retracting. At the rear of the base 5, the elastic member for imparting resistance to locking it is arranged.

For example, as shown in FIG. 3, the lower end portion of the back support 11 protrudes downward from the base of the arm 16. A lower cover 19 is attached to the lower back surface of the back support 11. The back support 11 is covered with a back sheet 20 from behind, and the lower cover 19 is also covered with the back sheet 11. The arm 16 can be configured as a member different from the back support 11. As shown in FIG. 1 (A), the upper portion of the skin material 13 is held pulled behind the right and left horizontally long pull portion 21.

(2). Main member Details of the backrest 3 will be explained below. First, the main member 14 and the back support 11 will be described with reference to FIGS. As clearly shown in FIG. 8, the back support 11 and the main member 14 have a width at the lower end that is smaller than the width at the upper end, and thus both have an inverted trapezoidal shape when viewed from the front. For example, as best shown in FIG. 7 (B), the back support 11 and the main members 14, both are loosely curved to forward concave in plan view, and, both, the waist strike portion of the seated person It is curved in a forward convex shape in a side view so as to be located at the forefront.

  For example, as shown in FIG. 2, square side ridges 23 projecting forward are formed on the left and right sides of the main member 14, and square bottom ridges 24 projecting forward are also formed on the lower end of the main member 14. Has been. Both protrusions 23 and 24 are continuous with each other. Both ridges 23 and 24 are opened rearward to form a channel shape.

For example, as shown in FIG. 10D, in the main member 14 , the back cushion 12 is disposed inside the side ridges 23 and the bottom ridges 24. Therefore, the side ridges 23 and the bottom ridges 24 are And has a reinforcing function and a positioning function of the back cushion 12. A skin material 13 covering the back cushion 12 is wound behind the main member 14, and an edge of the skin material 13 is hidden by the back support 11.

A belt-like edge plate 25 such as a resin plate is fixed to the end edge of the skin material 13 by means such as sewing or adhesion, while the ridges 23 and 24 on the back surface of the main member 14. A number of catch projections 26 are formed at appropriate intervals at a portion located slightly inside, and catch holes 27 formed in the edge plate 25 are fitted into the catch projections 26. Incidentally, the edge plate 25 is sewed to sleep heavy in its entirety skin material 13, and therefore, the skin material 13 is folded back at a point sewn portion.

(3) Back support For example, as shown in FIGS. 7 and 8, the left and right side edges of the back support 11 are side walls 11 'projecting substantially forward, and the main member is located below the back support 11. The left and right horizontally-lowered lower ribs 30 located behind the bottom protrusion 24 in FIG. A number of reinforcing ribs are connected to the lower surface of the lower rib 30. As shown in FIG. 10D, the side wall 11 ′ of the back support 11 is located behind the side protrusion 23 in the main member 14.

For example, as shown in FIG. 8, a pair of left and right inner vertical ribs 31 and outer vertical ribs 32 that are continuous with the arm 16 are projected forward on the front surface of the back support 11, and the lower rib 30 is connected to the inner vertical rib 31. Has been. The upper ends of the left and right outer vertical ribs 32 are continuous via the upper horizontal rib 33, and the upper ends of the left and right inner vertical ribs 31 are continuous via the lower horizontal rib 34. The lower horizontal rib 34 is also continuous with the left and right outer vertical ribs 32.

These ribs 30 to 34 have a reinforcing function and also serve as a stopper that regulates the amount of deformation when the back plate 10 is deformed so as to be recessed backward by the body pressure of the seated person. The inner and outer vertical ribs 31 and 32 also have a function of attaching the back plate 10 (this will be described later).

As described above, the back support 11 is covered with the back sheet 20 from behind. As shown in FIGS. 11C and 11D, a band edge plate 35 such as a resin plate is also fixed to the periphery of the back sheet 20 by sewing or the like, and on the left and right sides of the front surface of the back support 11. the catch projections 36 are forward projected in the vertical appropriate intervals, it is fitted a catch hole 37 drilled in the edge plate 35 to catch the projection 36. The catch projection 36, the bulging portion 36a for retaining is formed.

(4). The attachment means back plate 10 of the back plate to the back support can be easily attached to and detached from the back support 11. This point will be described mainly with reference to FIG. The main member 14 needs to be held by the back support 11 so that it cannot be displaced from side to side. Therefore, a substantially rectangular positioning projections 42 and 43 and left and right side portions and the lower portion of the main member 14 provided to protrude rearward, upper positioning projections 42, between a pair of upper clamping member 44 provided in the back support 11 fitted into the lower positioning projection 43 is fitted between the inner and outer vertical ribs 31 and 32 in the back support 11.

  Further, as a means for holding the main member 14 so as not to move forward, an upper engagement body 45 is provided on the outer side of the upper positioning projection 42 of the main member 14 so as to protrude rearward, and the top end of the upper engagement body 45 is viewed in plan view. An inclined upper engagement claw 46 is integrally provided, and an upper engagement receiving portion 47 having an L shape in plan view on which the upper engagement claw 46 is caught is formed on the front surface of the back support 11. The upper engagement receiving portion 47 is provided with a bottom plate 47a for reinforcement.

Upper engaging claw 46 is a fin-like configuration which is inclined in plan view so as to shift to the right and left outer side toward the front hand Accordingly can deformed so that its tip approaches the upper engaging member 45 (elastic Can be stenotic and deformed against.) Then, the tip of the upper engagement claw 46 comes into contact with the upper engagement receiving portion 47 from the rear in a state where the main member 14 is held so as not to move left and right.

  A lower engagement body 48 protrudes rearward from a lower end portion of the rear surface of the main member 14 below the lower positioning projection 43, and a pair of left and right lower engagements inclined in a plan view is provided on the lower engagement body 48. The claw 49 is provided integrally. The left and right lower engaging claws 49 are in the shape of fins (tongues), and both of them are inclined so that the distance between them increases toward the front. That is, the lower engagement body 48 and the left and right lower engagement claws 49 form an arrow shape. Similarly to the upper and lower engaging claws 46, the lower engaging claws 49 can be bent and deformed against elasticity so as to rotate around the base.

The lower engagement body 48 of the main member 14 enters a groove between the inner and outer longitudinal ribs 31 and 32 in the back support 11. A pair of left and right lower engagement receiving portions 50 (see FIG. 9B) with which the lower engagement claws 49 abut on the rear side are formed on the inner and outer vertical ribs 31 and 32 so as to face each other.

The upper and lower engagement claws 46 and 49 are basically engaged with the engagement receiving portions 47 and 50 by shifting the back plate 10 from above. However, depending on the case, even if shifted from above, either one or both of the upper and lower engaging claws 46 and 49 may not fit into the engaging receiving portions 47 and 50. In this case, as shown by an arrow A in FIG. 9 (A), by pressing backwards the main member 14 against the back support 11, it can be engaged with the engagement receiving portion 47 and 50. In this case, the engagement claws 46 and 49 are elastically deformed and hooked on the engagement receiving portions 47 and 50.

  The main member 14 is also held at the upper end of the main member 14 so that it cannot move left and right and cannot move downward with respect to the back support 11. That is, a rear-facing upper-end protrusion 53 and an upper frame portion 54 of an upper and lower opening continuous with the upper-end protrusion 53 are provided to project rearward from the upper end of the main member 14 toward the left and right ends. The upper end recessed portion 55 into which the upper end protrusion 53 is fitted and the male receiving portion 58 to be fitted into the upper frame portion 54 from below are formed. The lower part of the male receiving part 58 is an inner frame part 56 opened in the front-rear direction.

The upper surface of the upper end protrusion 53 is an upper flange 63, and the upper portion of the upper end recess 55 in the back support 11 is an upper step portion 55a where the upper flange 63 overlaps from the front. The upper frame portion 54 of the main member 14, the left and right horizontally elongated front and rear transverse bar portion 54a, has a 54b, male receiving portion 58 therebetween is that located. Inner frame 56, have left and right side plates 57 and the upper plate and the lower surface 59, and has a long rectangular shape in the vertical direction.

Just below the site of the upper frame portion 54 of the main member 14, and an example of the engaging means for holding the top member 15 upward movement fixed manner, the upper engaging claw 60 is formed. Upper engaging claws 60, by deforming against the elastic, can pivot back and forth about its lower end. On the other hand, among the inside of the frame portion 56 in the back support 11 has a horizontally long support shaft 61 is slightly above the site than the vertical intermediate position are formed integrally, to the support shaft 61, for example, FIG. 12 (A) A lever 62 shown in FIG.

Then, the top member 15, is held so as not to upward movement by the upper engaging claw 60, by the lever 62 to pivot the operation, it is possible to release the engagement of the upper engaging claws 60 against top member 15 . Since this point is not directly related to the present invention, a description thereof will be omitted.

For example, as shown in FIG. 9 (A), the left and right ends near the site of the upper end of the main member 14, the flange 63 on the shaped eaves protruding rearward is formed. Upper frame portion 54 is formed in a state of being continuous upper flange 63. On the other hand, as shown in FIG. 9A , an upper flange 64 is also formed at the upper end of the back support 11, and the upper end of the inner frame portion 56 slightly protrudes from the upper flange 64.

For example, as shown in FIG. 6, a rearward projecting portion 65 is formed between the left and right inner frame portions 56 in the upper portion of the back support 11. For example, as shown in FIG. 4 (A), backward projecting 65 includes a back plate 66 which is continuous to the upper flange 64 has a lower plate 67 which is continuous in the substrate of the back plate 66 and the back support 11, FIG. As shown in FIG. 5 (A), the lower surface plate 67 is provided with a handle hole 68 through which a person can insert his / her hand.

Therefore, the person, by Rukoto your finger to the back plate 66 in the rearward protruding portion 65 of the back support 11, or can be moved by pulling or attracting the chair. Since the back support 11 is a strong member having a robust structure, for example, even if a person inserts a hand into the handle hole 68 and lifts the chair, there is no problem in strength. When the chair is moved, the upper surface portion of the backrest is often grasped by hand. In this case, there is a problem that the upper surface of the backrest is soiled if repeated. On the other hand, if the handle hole 68 is provided as in this embodiment, the upper surface of the backrest can be prevented from being stained.

(5). Relationship between structure and the main member of the top member Next, referring also to FIG. 13 and FIG. 14 in addition to the diagram previously, briefly described top member 15 and its mounting structure. For example, as can be understood from FIG. 12, the back support 11 has an overlapping surface 71 that opposes the upper flange 63 of the main member 14 and the upper flange 64 of the back support 11. the first downward protrusion 72 provided at both end portions, the first downward protrusion 72 is fitted into the positioning hole 73 formed on the flange 63 of the main member 14.

In the present embodiment, the upper surface of the main member 14 and the upper surface of the back support 11 are substantially the same height, and the top member 15 overlaps both. The top members 15 having different heights can be connected to one type of main member 14, but the top member 15 overlaps the back support 11 regardless of the height, so that design uniformity is ensured. The height of the backrest 3 can be changed.

For example, as shown in FIGS. 12 and 13, a guide rib 74 is provided in a portion of the top member 15 that is slightly inside the first downward projection 72. The front surface of the guide rib 74 is inclined so as to be shifted toward the front as it goes upward. When the back plate 10 is attached, the guide rib 74 contacts the male receiving portion 58 of the back support 7 from above, so that the back plate 10 The rearward movement is guided so as to overlap the back support 7.

As shown in FIG. 12, a top ridge 75 that is continuous with the side ridge 23 of the main member 14 is formed on the left and right sides of the top member 15, and a second downward projection 76 is formed at the lower end of the top ridge 75. Is provided. On the other hand, the upper end portion of the side protrusions 23 of the main member 14 is adapted to the cylindrical portion 77 open upward, to the cylindrical portion 77, are fitted the second downward protrusion 76. It should be noted that the relationship between the protrusion and the cylindrical portion may be reversed, or may be connected by a joint of another member.

As shown in FIG. 12 , the left and right ends of the overlapping surface 71 of the top member 15 are notched. Therefore, lateral side recesses extending to the vicinity of the upper end are formed on the left and right sides of the top member 15. 78 is open. Then, vertically elongated plugs 79 inserted and attached to the left and right ends of the back support 11 are fitted in the side recesses 78 of the top member 15.

For example, as shown in FIG. 13 (A), the left and right ends of the back support 11, forms a forward ear portion 11a of the open groove-shaped, the dovetail groove 11b formed in the ear portions 11a, the plug 79 Leg portion 79a (see FIG. 13B) is fitted. A rear-facing claw 79b is formed at the lower end of the foot 79a of the plug 79. On the other hand, the claw 79b of the plug 79 is hooked from below on the ear portion of the back support 11, as shown in FIG. A matching claw catch 11c is projected forward.

For example, as can be understood from FIG. 3 (A), the portion above the polymerization surface 71 of the top member 15, for usage savings weight and resin, the cavity of the cavity and rearward openings of the forward opening Many are formed. For example, as shown in FIG. 14A, a considerable portion of the top member 15 is overhanging behind the back support 11, and a rearward projecting portion 65 of the back support 11 is placed behind the top member 15 at the rear. A rear wall 80 is formed so as to cover.

Thus, the rear wall 80 and top member 15 (of or the back plate 10) overhang portion 3a is formed as the main component, the overhang portion 3a of the backrest 3 is constituted by a top member 15. Top ridge 75 extends to the lower end of the rear wall 80, further, the lower end of the rear wall 80, a back projection 81 which is continuous to the top ridge 75 is formed.

The back cushion 12 extends upward from the main member 14 and covers the rear surface of the top member 15. Therefore, as shown in FIG. 14A, the back cushion 12 extends to the back protrusion 81 of the top member 15. The skin material 13 is wound up to the inner surface of the rear wall 80, and the edge plate 25 is fitted to the catch protrusion 26. So can be understood from FIG. 14 (B) (C), skin material 13 is penetrated to the inside of the side recess 78 of the top member 15, the catch projection 26 provided on the inner wall 78a of the side recesses 78, The edge plate 25 is fitted. Therefore, the skin material 13 is held in taut outside of the recess 78.

As shown in FIGS. 13 (A) and 14 (A), the first downward projection 72 has a tapered shape that is tapered in a side view, while the positioning hole 73 of the main member 14 is upward in a side view. Thus, the first downward projection 72 is smoothly drawn into the positioning hole 73. An engagement claw 82 is formed on the first downward projection 72 , and an auxiliary engagement hole 83 is formed on the back surface of the positioning hole 73. The engagement claw 82 protrudes backward in the first downward projection 72 at the left and right intermediate portions, and the engagement claw 82 protrudes forward in the first downward projection 72 on the left and right sides.

  Since these engagement claws 82 are fitted in the auxiliary engagement holes 83, the top member 15 is held so as not to be separated upward with respect to the main member 14. The engagement claw 82 can be released from the engagement with the auxiliary engagement hole 83 by pushing the engagement claw 82 with a minus driver or the like.

(6). Others present invention can be in addition to various concrete than the above embodiment. For example, the application target is not limited to a swivel chair, and can be applied to various chairs such as a pipe chair. Moreover, it cannot be overemphasized that it is applicable also to the chair whose backrest does not rock. Although have configured of two members of the main member and the top member of the back plate in the embodiment, the back plate is needless to say that may be a unitary structure.

When providing the rear filtrate facing protrusions in the back support as in the embodiments, backward protrusion of the back support may also be formed so as to extend over the left and right substantially the entire length of the backrest. Further, the back plate is formed to overlap only the front of the back support, Ru possible der to cover backward protrusion of the front and back support of the back-plate and (overhang portion) in series with the skin material.

Moreover, the handle hole may be opened in both the downward direction and the left-right direction. In other words, it is possible to provide a back plate protruding downward on the upper part of the backrest and use this back plate as a handle.

  The present invention is useful when applied to a chair. Therefore, it can be used industrially.

2 seats 3 backrest 3a backrest overhang 10 backboard 11 back support (back outer shell)
12 Back cushion 13 Skin material 14 Main member constituting the back plate 15 Top member constituting the back plate 65 Backward projecting portion of the back support 66 Back plate constituting the rearward projecting portion of the back support 67 Constructing the rearward projecting portion of the back support Lower face plate 68 Pull hole 80 Rear wall that constitutes the top member overhang

Claims (3)

The top of the rear portion of the backrest, the tab hole human can insert the hand from below, a front and rear direction and an upper that are provided so as to open downwardly without opening arrangement,
The backrest includes a shell-like back plate with a back cushion stretched on the front surface, and an outer shell disposed behind the back plate, and the handle hole is directed downward at the upper end of the outer shell. A rearward projecting portion that is opened is formed, and a rear plate is formed at the rear end of the rearward projecting portion to which a finger inserted into the handle hole can be applied,
Chair with backrest. The handle hole is also opened in the left-right direction,
A chair with a backrest according to claim 1. The upper part of the back plate overlaps the outer shell.
A chair with a backrest according to claim 1 or 2.

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