JP5562001B2 - Rocking chair - Google Patents

Description

Present invention, the seat in conjunction with the tilting after backrest is related rocking chair to move forward.

  As a type of rocking chair in which the backrest tilts backward, Patent Document 1 discloses that the base of the back column supporting the back of the backrest is connected to the seat receiving portion supported by the legs so as to be rotatable up and down. A configuration is disclosed in which the seat moves forward while the backrest tilts backward while the backrest sinks against the spring force connected between the section and the back column. Slider members (movable rails) having front and rear longitudinal open grooves are fixed to the left and right sides of the lower surface of the seat shell that supports the seat cushion, and the slider members slide back and forth on the pair of left and right guide rails in the seat receiving portion. Fits freely.

As another type, for example, in Patent Document 2, an intermediate fitting having a seat cushion on the upper surface is attached to a guide rail at the upper end of a seat receiving portion (chassis) through a sliding member fixed thereto, so that it can be moved back and forth. The base of the L-shaped guide track is fixed to the intermediate bracket in a side view, while the base of the L-shaped back support (back support) is fixed to the rear end of the seat receiving part in the side view. Is located behind the chair rather than the guide track.
And the up-and-down slide part provided in the back surface of the backrest with respect to the horizontal pin of the upper end of a back support | pillar is mounted | worn so that a vertical movement is possible. Further, the rollers on both sides of the lower horizontal pin attached to the lower side of the bracket extending downward on the back of the guide track with the backrest are transferred to the guide groove extending in the vertical direction provided on the guide track below the vertical slide portion. A configuration that is movably fitted is disclosed (see FIG. 5). According to this configuration, when a seated person leans on the backrest, the backrest descends while being tilted backward , and the seat moves forward as a whole.

JP 2003-344568 A US Patent Application Publication: US2009 / 0152921A1

However, in the configuration of Patent Document 1 and 2, (the point where the guide rail and the slider member) sliding portion between the lower surface and the seat receiving portion of the seat shell and the sliding portion of the seat receiving portion (chassis) and the intermediate sleeve (Location of guide rail and sliding member) is exposed to the lower part of the chair, and the appearance is poor. In general, grease or other lubricating oil is applied to the sliding part for lubrication. However, if the sliding part is exposed to the lower side of the chair, there is a problem that the lubricating oil drops on the floor. It was. Furthermore, when the seated person's finger or clothes to sliding portions approaches, there is a risk that Ru sandwiched in the gap of the sliding portion. In addition, since the load when the chair is lifted acts on the sliding part, it is necessary to increase the rigidity of the member at the sliding part and make it sturdy.

  The present invention has been made to solve such problems of the prior art.

The invention of claim 1 includes a seat outer shell supported by a seat receiving portion so as to be movable back and forth, and a backrest that can be tilted rearwardly, and the seat outer shell advances in conjunction with the rearward tilt of the backrest. a rocking chair for moving the seat receiving portion, while having a pair of horizontal plate projecting horizontally outwardly in the front and rear longitudinal, the said seat outer shell, the left and right horizontal piece of the seat receiving portion A mounting opening that covers from the outside and below is formed so as to open rearward, and a horizontal piece of the seat receiving portion includes a seat fitting that moves together with the seat outer shell, and the mounting opening in the seat outer shell. A lubricant receiving portion that is long in the front-rear direction is attached to the lower portion of the sliding portion of the mounting opening in the seat outer shell. The inner end close to the side surface of the receiving portion side are formed so as to approach the left and right sides of the seat receiving portion than the sliding portion.

According to a second aspect of the present invention, in the rocking chair of the first aspect, a bank portion protruding upward is formed at an inner end of the lubricant receiving portion.

According to a third aspect of the present invention, in the rocking chair according to the first or second aspect, the sliding portion is formed on a slider member fixed to each horizontal piece and on both left and right side portions of the seat bracket. And a slider holding portion for slidably holding the slider member.

The invention according to claim 4 includes a seat receiving portion and a seat outer shell positioned on the seat receiving portion, and the seat receiving portion has front and rear longitudinal left and right horizontal pieces projecting to the left and right outer sides thereof. On the other hand, the seat outer shell is formed such that a mounting opening that covers the horizontal piece of the seat receiving portion from the left and right outer sides and the lower side is opened rearward, and the seat outer shell is formed by the seat receiving portion. It is configured to move back and forth supported by a horizontal piece of
The seat outer shell is smoothly moved back and forth by a sliding portion to which a lubricant is applied, and the sliding portion of the mounting opening in the seat outer shell has a portion below the horizontal piece in the seat receiving portion. A longitudinal longitudinal lubricant receiving portion that receives the lubricant dropped from the moving portion below the horizontal piece without leakage is formed so as to approach the side surface of the seat receiving portion.

According to the invention 請 Motomeko 1, since the mounting opening of the seat outer shell is open at the rear to cover the horizontal plate in the seat receiving unit receives the seat outer shell and the seat to the movement of the back-and-forth movement parts and do not interfere, and, since the sliding portion between the horizontal plate and the seat on the bracket of the seat receiving portion is completely covered by the seat outer shell, in the sliding portions, contact seated person's finger or clothes It is safe without doing.

Furthermore, according to the invention of claim 1, wherein the seat on the lower surface side of the mounting opening in the outer shell, than the lubricant receiving portion located below the sliding portion that is provided, the sliding portion even drip lubricant such as adhering grease or lubricant Should lubricating agent is received at lubricant receiving portion, problems such as soiling in the floor lubricant fell in can be reliably prevented.

Further, since the inner end of the lubricant receiving portion extends beyond the sliding portion so as to approach the side surface of the seat receiving portion, the gap between the left and right side surfaces of the seat bracket is reduced, The design effect is also excellent, and there is an effect that an external object does not enter the gap.

According to the invention described in claim 2, even drip lubricant grease or lubricating oil or the like adhering to the sliding portions such as the slider member is unlikely to bank portion of the lubricant receiving portion of the seat outer shell been blocked Te, problems such as soiling in the floor lubricant fallen into can be prevented reliably.

As in the embodiment, when at least the upper surface recessed a reservoir Lubricant for the formation of the slider member, the sliding portion between the upper surface and the seat on the fitting of the slider member, the lubricant such as grease accumulated in the lubricant reservoir Can be lubricated to reduce sliding resistance. The upper surface of the slider member sliding area only site of reservoir recess formed lubricant is reduced, it is possible to reduce that amount sliding resistance.

It is a front side perspective view of the whole rocking chair concerning a 1st embodiment. (A) is a vertical side view in a normal state, and (B) is a vertical side view in a rocking (backward tilt) state. It is a perspective view of the back side. It is a perspective view of the back side in the state where the back support cover body was removed. It is the perspective view which isolate | separated the back cushion, the back outer shell, the back inner shell, and the back support cover body. It is a perspective view which shows the inner surface side of a back support cover body. It is a side view which shows the structure in the seat base which shows a seat base with a dashed-two dotted line. It is a lower surface side perspective view which shows the duplication part of a back outer shell and a seat outer shell. It is a lower surface side perspective view of the state where the seat outer shell was removed. FIG. 9 is a top perspective view of FIG. 8. It is a lower surface side perspective view of a seat inner shell. It is an upper surface side perspective view in the state where the seat inner shell was separated from the seat outer shell. It is a perspective view which shows a back outer shell, a back support | pillar body, and a slide guide member. (A) is explanatory drawing of the operation | work which mounts a slide guide member (back outer shell) to a back support | pillar body, (B) is explanatory drawings, such as the inclination angle of the slide guide member (back outer shell) in that case. It is a perspective view in the state where a seat bracket etc. was removed from a seat receiving part. It is a lower surface side perspective view of the state where the base of the back outer shell and the seat fittings are mounted 1 on the seat receiving part. XVII-XVII sectional view of FIG. It is a partially notched upper side perspective view which shows the connection part with respect to seat receiving parts, such as a back outer shell and a back support | pillar body. It is the XIX-XIX sectional view taken on the line of FIG. It is a front side perspective view which shows a back outer shell, a seat receiving part, a back support | pillar body, etc. It is XXI-XXI arrow expanded sectional view of FIG. It is a lower surface side perspective view of a seat outer shell. It is a partially cutaway sectional view showing an engagement portion between the seat outer shell and the front portion of the seat fitting. It is XXIV-XVXI arrow sectional drawing of FIG. It is a perspective view of a slider member. It is a perspective view which shows the attachment structure of the base part of a lock arm. (A) is an upper surface side perspective view showing a mounting portion of a lock arm, and (B) is a lower surface side perspective view.

  Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 21 show a first embodiment, which will be sequentially described below. In addition, in order to indicate directions in the following description, the words “front and rear”, “front”, “back”, and “left and right” are used, and these words indicate the posture of a person sitting on a rocking chair (hereinafter simply referred to as a chair). The standard. “Front view” is a state viewed from the direction facing the seated person.

<Outline of First Embodiment>
FIG. 1 is a front perspective view of the entire chair. First, an outline will be described based on FIG . 1 and FIG . The chair of the present embodiment is applied to a so-called rotating chair for office use, and the chair includes, as main elements, a leg device 1 (corresponding to a leg in the claims), a seat receiving portion 2, a seat 3, a backrest 4, and a back. The column body 5 and the armrest device 7 are provided.

A leg column 6 made of a gas cylinder constitutes a part of a leg device 1 having a conventionally known configuration. The leg column 6 is a leg body having a plurality of (generally five) branch legs extending radially. It is fitted in the center. The armrest device 7 are optional components, and the base end portion on the left and right sides of the seat base 9 (described in detail later) is detachably mounted, in which are erected on both right and left sides of the seat 3. For elbow hooking device 7 is not an essential part of the present invention, a detailed description thereof will be omitted. In the state where the armrest device 7 is removed, the armrest mounting portions 9d on the left and right sides of the seat base 9 are covered with a removable resin cover 8 (see FIGS. 7 and 8). In FIG. 7, the seat outer shell 11, the seat outer shell 14, and the back column cover body 18 are not shown.

  The seat receiving portion 2 includes a housing-like seat base 9 that is fixed to the upper end of the leg column 6 and is opened upward. On the other hand, the seat bracket 10 to which the seat 3 is attached is slidably attached to the upper end of the seat base 9 (see FIGS. 2, 7, 13, 20, etc.).

The seat 3 includes a seat outer shell 11 attached to the top surface of the seat fitting 10, a seat inner shell 12 attached to the top surface of the seat outer shell 11, and a seat cushion body 13 attached to the top surface of the seat inner shell 12. (See FIGS. 2, 7, 12, etc.) Seat outer shell 11 and the seat inner shell 12, POM, but is an injection molded article with the material of the synthetic resin material such as PP, it may be a metal or wood.

The backrest 4 includes a back outer shell 14, a back inner shell 15 attached to the front surface of the back outer shell 14, and a back cushion body 16 attached to the front surface of the back inner shell 15 (FIGS. 2 and 3). To FIG. 8, FIG. 12, FIG. Back outer shell 14 and the back inner shell 15, POM, but is an injection molded article with the material of the synthetic resin material such as PP, it may be a metal or wood. The back outer shell 14 as an example of the back side member is formed in an L shape in a side view, and a main body portion 14a that supports the back inner shell 15 and a base portion 14b that extends forward from the lower end of the main body portion 14a. It consists of.

In the embodiment, the back strut body 5 includes a back strut 17 having a pair of left and right pipe members 17 a formed in an L shape in side view, and a detachable back strut cover body 18 that covers the back side of the back strut 17. It has. As another example, the back support 17 and the back pillar cover 18 constituting the back support column 5 may be a form that is integrally formed for example by a resin material or aluminum shaped articles.

The base of the pair of pipe members 17a in the back support column 5 is fixed by welding to the base substrate 19 that is fixed to the inner surface of the metallic seat base 9, further welded to the base substrate 19 is covered with a metal fitting 20 Etc. (see FIGS. 13 and 18). In addition to this, it may be screwed.

The seat base 9 has a box shape with an upward opening, and a metal base substrate 19 is fixed to the inner surface of the rear portion thereof by welding. The rear end of the seat base 9 is open. The seat base 9 and the bush 21 which is fixed to the base substrate 19, and fitting the upper end of the leg support post 6. An elevating lever 22 for operating the push valve of the leg support 6 (gas spring) and an operation lever 23 for switching the backrest 4 between a locking operation disabled state and a locking operation enabled state protrude from the left and right sides of the seat base 9. Provided (see FIG. 3, FIG. 13, FIG. 15 to FIG. 17, FIG. 19 etc.).

A long hole 24 that is long in the front-rear direction is formed in the left and right side plates 9 a of the seat base 9 , and a resin bush 24 a is attached to the long hole 24. The connecting shaft 25 is disposed so as to penetrate the inner diameter long holes of the left and right bushes 24a to the left and right and to be slidable in the front-rear direction (FIGS. 2, 7, 13, 15, etc.). reference).

The left and right sides of the rear end of the seat on the fitting 10 having a flat upper plate 10a, the shaft hole-shaped mounting portion 26 fitted on the connecting shaft 25 is provided. In addition, a spring support piece 29 for supporting a rear spring receiving body 31a fitted to a rear end of a locking spring 30 described later is directed downward at a rear end portion of the seat bracket 10 and in an intermediate position in the left-right direction. It is extended (see FIG. 2, FIG. 13, FIG. 19, etc.).
Then, the seat horizontal piece 9b of the left and right outward at the upper end of the left and right side plates 9a of the base 9 is provided integrally on the horizontal plate 9b, a U made of like holding portion is formed of a resin slider member 28 Is fixed from the outside so that it cannot move back and forth. The slider holding portion 27 of the left and right sides of the U-shaped cross section in the seat on the bracket 10 is fitted over the slider member 28, the seat on the bracket 10 is slidably configured back and forth with respect to the seat base 9.

As shown in FIG. 25, at least the central portion in the longitudinal direction of the upper surface of the slider member 28 are formed depressions 56 reservoir long main lubricant back and forth. A sliding surface 28a that slides on the lower surface of the upper plate 10a of the seat bracket 10 projects from both front and rear ends. Incidentally, across the sliding surface 28a, preferably also formed recess an auxiliary lubricant reservoir 56a to the end portion back and forth from the lubricant reservoir 56. When the seat on fitting 10 is moved in the longitudinal direction, the grease from the lubricant reservoir 56 is because easily trapped by the auxiliary lubricant reservoir 56a.

  On the outside of the left and right side plates 9a in the seat base 9, a pair of left and right bearings 32 as mounting portions provided at the front end of the base 14b at the lower end of the back outer shell 14, and a pair of left and right mounting portions in the seat bracket 10 26 is fitted to the connecting shaft 25. The mounting portion 26 is disposed at a position separated from the outside of the left and right side plates 9a, and the bearing portion 32 is disposed close to the outside (see FIGS. 9, 16, 17, and 16). In FIGS. 13 and 15, in order to show the state of the connecting shaft 25, the seat bracket 10 is intentionally removed from the connecting shaft 25. The mounting operation of the connecting shaft 25 will be described in detail later.

  Accordingly, when the backrest 4 at the time of the rocking operation is tilted backward, the seat bracket 10 is moved forward. These loads are elastically supported by the rocking spring 30.

The seat outer shell 11 is formed with a mounting opening 11a opened rearward. Therefore, by a way to push fitted from the front of the seat outer shell 11 at the top of the seat base 9, when the lower upper-side portion and the seat on the fitting 10 of the outer right and left side plates 9a of the seat base 9 is divided covered both long hole 24 and the bush 24a are also covered from the outside (see FIG. 8).
In addition, a substantially semicircular arc-shaped shaft front cover 33 formed integrally with the rear end portion of the seat outer shell 11 adjacent to the attachment opening 11 a and a front end of the base portion 14 b at the lower end of the back outer shell 14 are integrated. to a shaft portion rear cover of the substantially semicircular formed bearing portion 32, by overlapping part at the lower side, the lower part of such connecting shaft 25 and the inner and outer bushes 52, 53 are covered. The presence of the outer plate 33a in the shaft front cover 33 prevents the connecting shaft 25 from coming out in the axial direction (see FIGS. 8 and 9).

Further, a pair of left and right engaging claws 54 are provided rearwardly on the front end side of the mounting opening 11a (see FIG. 22). In addition, a screw (not shown) is inserted into the female screw portion of the rear portion of the upper plate 10a of the seat bracket 10 behind the position of the engaging claw 54 in the top plate portion 11b above the attachment opening portion 11a. Mounting holes 11c are formed (see FIGS. 12 and 13). Therefore, when Komu fitted from the front of the seat outer shell 11 in the seat base 9, a pair of right and left engaging claws 54 are engaged with the front edge of the seat on the bracket 10. Then, what is necessary is just to screw the rear part of the seat outer shell 11 and the rear part of the seat fitting 10 through the attachment hole 11c. Thereby, the seat outer shell 11 and the seat bracket 10 are firmly attached.

Further, the lower plate below the top plate portion 11b of the seat outer shell 11, a long lubricant receiving portion 55 before and after in the outer left and right sides of the mounting opening 11a is formed integrally. The inner end adjacent to the outer surface of the left and right side plates 9a of the inner seat base 9 of the lubricant receiving portion 55, the outer surface of the left and right side plates 9a beyond the sliding portion consisting of the slider holding portion 27 and the slider member 28 Closest. Then, the inner end close to the side surface of the front Symbol seat receiving portion of the lubricant receiving unit 55, the bank portion 55a that protrudes upward is formed.

More specifically, the longitudinal lubricant receiving portion 55 back and forth along the left and right side portions of the mounting opening 11a is formed, as long bank portions 55a back and forth upwardly projecting, it is integrally formed (FIG. 9, FIG. 22 and FIG. 24). In the state where the seat outer shell 11 is attached to the flat plate-like metal fitting 10, as shown in FIG. 24, the seat base is below the sliding portion composed of the slider holding portion 27 and the slider member 28. The bank portion 55a is arranged at a position close to the outer surface of the left and right side plates 9a.
Therefore, even if unlikely drip lubricating agents such as grease from the sliding parts such as the slider holding portion 27, and received without fail lubricant dripped with the lubricant receiving portion 55 and the bank portion 55a, such as a floor outer It is possible to reliably prevent the grease from dripping onto the surface.

  Further, since the shaft front cover 33 and the shaft rear cover portion (bearing portion 32) are formed in a substantially semicircular arc shape, the shaft front cover 33 and the shaft portion are tilted backward when the backrest 4 is tilted during the locking operation. The rear cover portion (bearing portion 32) does not interfere with each other and can be rotated in a partially overlapping state. Furthermore, a stepped portion 34 is formed at the rear end of the seat outer shell 11 so as to overlap with the front end edge of the base portion 14b at the lower end of the back outer shell 14 by an appropriate size from above (see FIG. 12).

As shown in FIGS. 7, 26, and 27, a lock arm 34 is attached to a base receiver 36 fixed in the seat base 9 so as to be rotatable in the vertical direction. On the free end side of the lock arm 34, a long hole 35 into which the tip crank portion 23a of the operation lever 23 is fitted is formed. When the lock lever 34 is pushed up through the long hole 35 by the turning operation of the operation lever 23 through the elongated hole 35 and the free end side of the lock arm 34 is raised, a recess is formed on the upper surface of the lock arm 34. The connecting shaft 25 is fitted into the stopper engaging portion 34a thus formed, and the connecting shaft 25 is prevented from moving forward. As a result, the forward movement of the seat bracket 10 and thus the seat 3 can be prevented, and the backward tilting of the backrest 4 is prevented, and the locking operation is disabled.
As shown in FIG. 7, when the lock arm 34 is in the down position, the stopper engaging portion 34 a is disengaged from the connecting shaft 25 and allows the connecting shaft 25 to move forward. Thereby, the forward movement of the seat bracket 10 and by extension, the seat 3 can be allowed, and the backward tilting while the backrest 4 is depressed is allowed, so that the rocking operation is possible. In this way, the forward movement of the seat 3 can be prevented by simply pushing up the lock arm 34, and the locking operation cannot be performed, and the extending direction of the lock arm 34 for the prevention is the expansion and contraction of the locking spring 30. Since it is substantially parallel to the direction, the rigidity of the lock arm 34 can be made smaller and smaller than that which can withstand shearing.

  As shown in FIGS. 26, 27 (A) and 27 (B), the synthetic resin base receiver 36 has a bearing recess 36a on the side surface in which the circular base 34b of the lock arm 34 is rotatably fitted. Has been. Thus, the lock arm 34 fitted to the base receiver 36 is also restricted by the inner surface of one side plate 9a of the seat base 9, and the seat base 9 is prevented from moving in the width direction. A retaining piece 36b having a T-shaped cross section is provided on the upper side of the front end surface of the base receiver 36, and a projection 36c for preventing displacement is provided on the lower side. The front base plate 9c of the seat base 9 is provided with a locking hole 57 having a wide upper side and a narrow lower side so that the retaining piece 36b is dropped and cannot be removed. Below that, a positioning hole 58 into which the projection 36c is fitted is formed. By configuring the base receiver 36 in this manner, the lock arm 34 can be mounted without using a pin that penetrates the seat base 9 in the width direction.

Fitting a pair of locking claws 59a that is provided at the lower end base portion of the side view M-shaped elastic spring member 59 made of synthetic resin, a 59b, so as not to escape the locking hole drilled in the base substrate 19 (not shown) Include. The engaging claw 34 c provided on the lower surface of the lock arm 34 can be elastically engaged with the laterally projecting portion 59 c of the elastic spring body 59.

On the other hand, the synthetic resin of the combined block body 60 of the bearing and the displacement prevention, a bearing portion of the middle shaft portion to rotatably and upwardly omission inability of the operating lever 23, the tip crank portion 23a of the seat base 9 Width A portion 60 a that prevents inadvertent movement in the direction and a portion that presses the lower end base portion of the elastic spring body 59 are provided, and a locking claw (not shown) is also locked in the base substrate 19. It is the structure which can be inserted in a hole (not shown) so that it cannot be removed. When the locking claw 34c climbs up and down the lateral projection 59c when the lock arm 34 is rotated up and down, a licking feeling can be given to the operator via the operation lever 23.

Next, a connection structure between the back outer shell 14 as an example of the back side member and the back column body 5 will be described. In the present invention, as will be described later, the opening 40 is formed in a vertically long view in the rear view, and the opening 40 is formed in the back column body 5 in both the normal state (non-locking state) and the locking state of the backrest 4. Is blocked. Further, when the back outer shell 14 is attached to the back strut body 5, at least the upper side of the back strut body 5 (particularly the back strut cover body 18) can pass through the opening 40 to the inner surface side of the back outer shell 14. (See FIGS. 2 to 4, 13, 15, 19, and 20).

An opening 40 is formed in the back outer shell 14 so as to continuously extend from the front end of the base portion 14b on the left and right center side to the midway height position of the main body portion 14a. However, the middle part in the front-rear direction of the base part 14 b and the middle part in the vertical direction of the main body part 14 a are integrally connected by a plurality of connecting members 41 so as to straddle the opening 40 on the inner surface side of the back outer shell 14. (See FIGS. 13, 18, and 20). As a result, the left and right portions of the back outer shell 14 separated by the opening 40 are not easily deformed. A large number of grid-like reinforcing ribs 42 are integrally formed on the outer periphery of the opening 40 and on the inner surface of the back outer shell 14 in order to improve its rigidity.

At the upper end of the back support 17 in the back support column 5, the horizontal pin 4 3 for connection fixed against the back outer shell 14, left and right ends of the transverse pin 43 is exposed to the outside. On the other hand, in the opening 40 in the back outer shell 14, a pair of upper and lower longitudinal mounting grooves 44 are formed at positions facing each other along the left and right side edges extending vertically on the main body 14a side. A guide member 45 having a recessed slide groove 45a is fitted in each mounting groove 44 (see FIGS. 2, 4, 5, 7, 19 to 16, etc.). In the embodiment, as shown in the figure, the sliding groove 45a is vertically long and is formed in a gentle arc shape. The center of this arc is located on the back cushion body 16 side (the front side of the chair).

Guide member 45 may be made of high-performance resin having 且 one wear resistant sliding resistance rather small and both ends of the metallic cross-pin 43, fluorine sliding portion between the transverse pin 43 A metal member with a coating may be used. When the back outer shell 14 is mounted on the back column 17, a configuration in which the guide member 45 can be fixed to the inner surface of the back outer shell 14 may be employed. As another example, directly to the back outer shell 14, it may form the shape of the upper and lower longitudinal sliding groove 45a and the upper and lower longitudinal hole, on the contrary, a guide member 45 to the back support column 5 side, The lateral pins 43 may be provided on the back outer shell 14 (back side member). In these cases, you may comprise by a long hole and a link member.

Against the back support 17, the back post cover 18 is detachably attached. As shown in FIG. 6, on the inner surface of the back pillar cover 18, support ribs 46 which the U-shaped groove 46a for supporting each of the pair of pipe members 17a are formed notches is a plurality of locations Is formed. The width of the open end of the U-shaped groove 46a is slightly narrower than the diameter of the pipe member 17a, and a retaining claw 47 disposed in the vicinity thereof is provided. Does not fall off easily. Further, notches 48 for avoiding both ends of the lateral pin 43 are formed on the left and right side plates of the back column cover body 18. Further, a housing-like fitting portion 49 opened downward is formed at the upper part of the inner surface of the back column cover body 18, and an engaging claw portion 50 is provided at the lower part of the inner surface of the back column cover body 18. .

Accordingly, in order to firmly attach the back strut cover body 18 to the back strut 17, as shown in FIG. 19, the fitting portion 49 is inserted into the upper end of the reinforcing bracket 51 that connects the upper ends of the pair of pipe members 17 a from above. On the other hand, the engaging claw portion 50 may be engaged by being pushed into an engaging hole (not shown) formed in the rising piece at the rear end of the base substrate 19. The back outer shell 14 is made to approach the back strut 17 from the front side and the opening 40 approaches the lateral pin 43 of the back strut 17 in an oblique posture, and the pair of guide members 45 in the opening 40 is made to approach. The both ends of the horizontal pin 43 are fitted (details will be described later).

Incidentally, after attach the back post cover 18 above the back support 17, attach the back outer shell 14 to the back support 17, is further order to secure the back inner shell 15 After that the back outer shell 14 preferably . The back strut cover body 18 may be attached to the back strut 17 later. FIG. 4 shows this state.

  Next, an operation for fitting the pair of guide members 45 in the back outer shell 14 into both ends of the lateral pin 43 in the back column 17 will be described.

  When the distance between the pair of guide members 45 is larger than the dimension between both end portions of one horizontal pin 43, generally, at least one guide member 45 is in relation to the back support member such as the back outer shell 14 or the like. Although the structure which can be attached or detached, or the structure which retrofits the horizontal pin 43 with respect to the back support | pillar 17 of the back support | pillar body 5 is employ | adopted, since it requires a fixing means separately that it is removable, there are many components. There was a problem of becoming.

  Therefore, for example, in Japanese Patent No. 4119300, as a configuration for connecting the back of a chair and a back support member that supports the chair, a horizontal shaft provided on the back support member and protruding in the width direction, and a part of the back And a pair of restricting portions provided on the inner surface of the back cover for covering the back side of the back. When the horizontal axis is inserted obliquely inside the pair of standing walls, both ends of the horizontal axis are inserted through the insertion holes, and the back cover is attached to the back of the back, the pair of standing walls are paired inside the pair of standing walls. The structure which inserts a control part and controls the horizontal movement of a back support member by the said control part is disclosed.

However, even in this configuration, it is necessary parts increases, and, since a surface losses and many man-hours for connection, there is a problem that manufacturing cost becomes high.

In the present embodiment, the pair of guide members 45 mounted on the back outer shell 14 has a longitudinal sliding groove (guide groove) 45 a in the vertical direction. in which a pair of guide members 45 on the assumption that it is possible to relatively move up and down, and employs a configuration that can reduce the need parts and mounting steps for.

That is, first, the back outer shell 14 in which the pair of guide members 45 are mounted so as to be opposed to the left and right sides of the vertically long opening 40 is the horizontal pin 43 whose left and right side edges in the opening 40 are horizontal. It is made to approach the horizontal pin 43 so as to be inclined.
In the embodiment, when the length L1 of the lateral pin 43 is L2 and the distance between the inner sides of the pair of guide members 45 is L2 (<L1), the back outer shell 14 is inclined as shown in FIG. The back outer shell 14 is rotated so that the lateral pin 43 can be inserted between the inside of the pair of guide members 45, and then the lateral pin 43 fits into the sliding groove 45a of the pair of guide members 45 (see FIG. (See the solid line state in FIG. 14A).
As a result, as shown in FIGS. 11, 12, and 18, the posture of the back outer shell 14 can be returned so that the left and right side edges of the vertically long opening 40 are vertical, and the horizontal sideways The pair of guide members 45 can move up and down relatively with respect to the pin 43.

The length of the line segment OP (= the distance between the insides of the pair of guide members 45) is L2, and the length of the line segment OQ (= the length of the horizontal pin 43) is L1. At that time, as can be understood from FIG. 14B, the angle θ at which the back outer shell 14 is first tilted has a relationship of cos θ = L2 / L1. Therefore, when the length of the Ru distance der relatively shifting for the vertical direction of the one end of the slide groove 45a with respect to the horizontal transverse pin 43 line segments PQ L4, sinθ = L4 / L1. Therefore, as described above, the horizontal pins 43 are inserted between the inner sides of the pair of guide members 45 so that the back outer shell 14 (the left and right side edges of the opening 40) is inclined with respect to the horizontal horizontal pins 43 . In order to make this possible, the distance in the vertical direction of the sliding groove 45a is at least L4.

  If the vertical distance of the sliding groove 45a required before the backrest 4 is almost in the upright state to the rocking state is shorter than L4, the back outer shell 14 is attached to the back column without removing the guide member 45. In order to attach to the body 5, the distance in the vertical direction of the sliding groove 45a may be formed slightly longer than L4. On the contrary, when the distance L3 in the vertical direction of the sliding groove 45a required before the backrest 4 is almost in the upright state to the locked state is larger than L4, a pair of guide members is set so that the distance L3 is a required length. 45 is formed. In any case, if configured as in the present embodiment, it is only necessary to fix in advance the pair of guide members 45 having the vertically long sliding grooves 45a on the left and right sides of the vertically long opening 40, and the necessary number of parts and There is an effect that the mounting process is extremely reduced.

  The arrangement position of the upper end of the guide member 45 is set to a higher (upper) position than the upper edge 40a of the opening 40 (see FIGS. 2, 3, 19, 20, etc.).

The lateral pin 43 is axially connected to the guide member 45 so that it can move up and down, so that the inner surface side of the back outer shell 14 in the backrest 4 (the space between the back outer shell 15) and the back strut body. The upper part of the back strut body 5 is connected to the upper part of 5 so that it can move up and down, and the backrest 4 is in the normal state (see FIG. 2A) and the locking state (see FIG. 2B). On the other hand, the back outer shell 14 is covered on the back side (main body portion 14a).
Accordingly, since the connecting portion that can be moved up and down by the lateral pin 43 and the guide member 45 is always hidden by the back outer shell 14, the appearance of the back side of the chair is improved. In particular, as shown in FIG. 19, when the backrest 4 is in the normal state, the upper end 18 a of the back strut body 5 (with the back strut cover body 18 attached to the back strut 17) is positioned on the inner surface side of the back outer shell 14. In this state, the upper edge 40a of the opening 40 overlaps with the dimension H1 and the upper end 18a is located close to the inner surface of the main body 14a of the back outer shell 14, so that the opening 40 (particularly the upper edge of the main body 14a Even if a person's finger touches the vicinity of 40a), the finger does not get caught in the gap between the back outer shell 14 and the back strut body 5 (back strut cover body 18).
Of course , human clothes are not caught in the gap. Further, as described above, the sliding groove 45a is formed in an arc shape so that the inner back surface of the back outer shell 14 and the back strut body 5 (with the back strut cover body 18 attached to the back strut 17 during the locking operation). ) Is regulated to be uniform with the back surface.

In the rocking state of the backrest 4, the backrest 4 tilts backward while sinking with respect to the back column body 5 having a constant posture. Also at this time , the back side of the back outer shell 14 covers the upper part of the back column body 5 (see FIG. 2B). In that case, the upper part of the back strut body 5 (upper part of the back strut cover body 18) greatly enters the inner surface side of the back outer shell 14 (the space between the back outer shell 15). The back surface shape of the back column cover body 18 and the shape of the sliding groove 45a should be designed so that the back surface of the back column cover body 18 is close to the edge 40a and no gap is formed. The rocking state includes a backward tilting posture in the middle from the normal state where the backrest 4 is substantially upright to the maximum backward tilting posture.

  Further, in either the normal state (see FIG. 2A) of the backrest 4 or the locking state (see FIG. 2B), the side edge of the opening 40 extending in the vertical direction and the back strut cover body 18 It is preferable that the gap formed between the side surfaces extending in the vertical direction is set to be as small as possible. This is to prevent clothes or the like of a person approaching or contacting the back side of the back outer shell 14 from being caught in the gap.

Furthermore, in any state of the backrest 4 in the normal state (see FIG. 2A) and the rocking state (see FIG. 2B), a part of the side surface of the back column cover body 18 in the side view of the chair. The back strut cover body 18 and the back outer shell 14 are shaped so that there is no gap between them and the back of the back outer shell 14.
< Structure for attaching base 14b and seat bracket 10 to seat base 9 via connecting shaft 25 >
As shown in FIG. 17, the inner bushing 52 fitted entrance is Ru to the bearing portion 32 at the base 14b of the back outer shell 14. Next, as described above, the slider holding part 27 having a U-shaped cross section on both the left and right sides of the seating bracket 10 is fitted on the slider member 28, so that the seating bracket 10 is attached to the horizontal piece 9 b of the seat base 9. On the other hand, it is inserted from the front (see FIG. 15), and then the outer bush 53 is fitted into the mounting portion 26 of the seat bracket 10 from the outside of the bearing portion 32, whereby the seat bracket 10 and the base portion of the back outer shell 14 are connected. They are connected so as not to separate.
Thereafter, the connecting shaft 25 is inserted from the outside of one outer bush 53, and the seat bracket 10 and the base portion 14b of the back outer shell 14 can be moved back and forth with respect to the seat base 9 outside the bush 24a of the seat base 9. Connect. In addition, the slider holding part 27 having a U-shaped cross section on both the left and right sides of the seat bracket 10 is fitted on the slider member 28 so as to surround the slider member 28 in which the horizontal piece 9 of the seat base 9 is built up and down. Therefore, even if the seat bracket 10 is lifted by hand during the assembly operation, it does not come off the seat receiving portion 3.

In step before mounting the seat on the bracket 10 relative to the seat base 9, the front spring receiving member 31b which is fixed to the inner surface of the front plate 9c of the seat base 9 fitted to the front end of the locking spring 30, the A rear spring receiver 31 a is disposed at the rear end of the locking spring 30. When the upper end of the back outer shell 14 is pulled forward before the connecting shaft 25 is attached, the base 14b of the back outer shell 14 and the seat bracket 10 are retracted by rotating around the lateral pin 43. Since the position of the spring support piece 29 is also retracted, the rear spring receiving body 31a is fixed to the spring support piece 29, and then the connecting shaft 25 is inserted from the outside of one outer bush 53 while pushing the upper end of the back outer shell 14 backward. And the connecting shaft 25 can be inserted at once.
Then, by releasing the hand from the back outer shell 14, the connecting shaft 25 is located at the rear end of the bush 24a, so that the locking spring 30 can be pretensioned. By this pretension (initial biasing force of the locking spring 30), the seat bracket 10, and thus the seat 3 as a whole, is biased to the rear of the chair with respect to the seat receiving portion 2, and the backrest 4 takes an upright posture.

In addition, as shown in FIG.11 and FIG.12, the structure of the overlap coupling | bonding (lap joining) of the seat outer shell 11 and the seat inner shell 12 is a plurality of places provided in the seat inner shell 12 and the seat front portion 12a. The female engagement portion 61 is a fitting structure with a plurality of male engagement portions 62 projecting upward on the surface of the seat outer shell 11, and a plurality of female engagement portions provided on the seat rear portion 12b. It is a fitting structure of the part 63 and a plurality of male engaging parts 64 projecting upward on the surface of the base part 14b of the back outer shell 14, and further, a seat rear part 12b is provided with respect to the sinkable base part 14b. A pair of left and right male engaging portions 65 and a corresponding female engaging portion 66 that can be supported while allowing the displacement in the front-rear direction in conjunction with each other are provided.
Further, as shown in FIG. 5 and the like, the back outer shell 14 and the back inner shell 15 are overlapped and joined together by a plurality of female engaging portions 67 provided on the back inner shell 15 and the back. The outer shell 14 has a fitting structure with a plurality of male engaging portions 68 projecting upward on the surface of the main body portion 14a.

<Configuration of the non-Ppuchiruto of the seat inner shell>
A seat inner shell constituted by separate parts of the seat front part and the seat rear, the configuration of the heat Ppuchiruto that enables dynamic subduction seat rear relative to the seat front, JP 2002-10859 (Patent No. As disclosed in Japanese Patent No. 3863353), the engaging claw for connection and the receiving portion that can be turned up and down relatively on both the left and right sides of the rear end portion of the seat front portion and the front end portion of the seat rear portion are fitted. It is known that the combined configuration and the configuration of a separate part in which the front seat portion and the rear seat portion are connected by a hinge (not shown).

However, in these configurations, since the front and rear members only bend at the straight and left longitudinal straight portions such as the fitting component and the hinge portion, the front-rear direction region of the bent portion is narrow and the flexibility is low. Therefore, be covered by a seat sheet comprising an upper surface of the seat inner shell from the cushion material, will be bent portion presses in a narrow range femoral lower surface of the seated person, comfortable is not always satisfactory. In addition, because it is a separate part, assembly work was required to connect both parts.

On the other hand, in the present embodiment, a configuration is adopted in which the sitting comfort is good and the assembling work is simplified. That is, the seat inner shell 12 has a seat front portion 12 a and a seat back portion 12 b, and a plurality of slits 12 c that are long in the left-right direction of the seat 3 between the seat front portion 12 a and the seat back portion 12 b. A large number of slits 12c are formed in a zigzag shape in the left-right direction and the front-rear direction of the seat 3 around the portion where the body pressure of the seated person acts strongly (see FIGS. 10 to 12). It should be noted that the width of the slit 12c is such that cracks do not enter the end of the slit 12c due to repeated bending action at the end of the slit 12c (excluding those opened at the left and right side edges of the seat inner shell 12). A corner portion such as a round circle having a diameter slightly larger than the dimension is formed.

  Further, as shown in FIG. 11, a U-shaped cross-section reinforcing portion 12 d is continuously provided on the lower surface side of the seat inner shell 12 so as to straddle the lower surfaces of several slits 12 c. The group of slits 12c having such a configuration allows downward stretching and deformation due to the body pressure of the seated person, and as a result, high fit is obtained. Further, since the seat inner shell 12 is connected to the seat front portion 12a and the seat rear portion 12b via a bendable region having a large number of slits 12c corresponding to the seat 3, the seat 3 is allowed to bend. Has been. The central portion of the bend of the seat 3 is set approximately at the position where the seat bone of the seated person hits or slightly in front of it. Furthermore, since only the rear seat portion 12b is engaged with or connected to the base portion 14b of the back outer shell 14, when the back outer shell 14 tilts backward while sinking, only the rear seat portion 12b can be bent so as to sink downward.

  Since it comprised as mentioned above, the seat inner shell 12 can be integrally formed with a synthetic resin, and the connection operation | work with the seat front part 12a and the seat rear part 12b becomes unnecessary.

  As another embodiment, a connecting portion capable of moving up and down with the upper portion of the back column body may be provided in a space between the back cushion body 16 and the back side member supporting the back side.

Furthermore, as another example of the back side member, there is one in which an L-shaped frame in a side view is fixed to the back surface of the back member that supports the back surface of the back cushion body 16. This frame may be made of metal. It is a gate-shaped frame as viewed from the back, consisting of a pair of left and right L-shaped vertical frame portions and an upper frame portion connecting the upper ends of the vertical frame portions. Secure to the part. A portion surrounded by a pair of left and right vertical frame portions and an upper frame portion is defined as an opening 40. The lower end base portion of the pair of left and right vertical frame and extends in the seat base 9 direction, the front end of the lower end base portion is configured to be pivotally connected to the consolidated shaft 25. The back column body 5 fixed to the seat base 9 is disposed in the opening 40, and a connecting portion capable of moving up and down is provided between the upper portion of the back column body 5 and the inner upper portions of the pair of left and right vertical frame portions. It is set as a configuration. Even with this configuration, regardless of the posture of the backrest, the vertically movable connecting portion between the back side member (= back member and frame) and the upper portion of the back column body is always hidden by the back side member. become.

DESCRIPTION OF SYMBOLS 1 Leg apparatus 2 Seat receiving part 3 Seat 4 Backrest 5 Back support body 9 Seat base 9b Horizontal piece 10 Seat bracket 11 Seat outer shell
11a Seat outer shell mounting opening 12 Seat inner shell 13 Seat cushion body 14 Back outer shell 14a Body portion 14b Base portion 15 Back inner shell 16 Back cushion body 17 Back strut 17a Pipe member 18 Back strut cover body 19 Seat base 24a (long Bushing 25) Connecting shaft 27 Slider holding portion 28 Slider member 30 Locking spring 40 Opening portion 43 Horizontal pin 45 Guide member
55 Lubricant receiving part
55a Bank

Claims (4)

A rocking chair comprising a seat outer shell supported by a seat receiving portion so as to be movable back and forth, and a backrest that can be tilted rearwardly, wherein the seat outer shell moves forward in conjunction with the rear tilting of the backrest ,
The seat receiving portion has a pair of left and right horizontal pieces that protrude longitudinally in the longitudinal direction, and the seat outer shell has a mounting opening that covers the horizontal pieces of the seat receiving portion from the left and right outer sides and from below. Is formed on the horizontal piece of the seat receiving portion, and a seat bracket that moves together with the seat outer shell is located inside the mounting opening in the seat outer shell and moves back and forth. It is attached to
In addition, a lubricant receiving portion that is long in the front-rear direction is provided at a portion below the sliding portion in the mounting opening in the seat outer shell, and an inner end on the side close to the side surface of the seat receiving portion is the sliding portion. It is formed so as to be closer to the side surface of the seat receiving part than
Rocking chair. A bank portion protruding upward is formed at the inner end of the lubricant receiving portion,
The rocking chair according to claim 1. The sliding portion has a slider member fixed to each horizontal piece, and a slider holding portion that is formed on both left and right sides of the seat bracket and slidably holds the slider member. Yes,
The rocking chair according to claim 1 or 2. A seat receiving portion and a seat outer shell positioned on the seat receiving portion, the seat receiving portion having front and rear longitudinal left and right horizontal pieces projecting to the left and right outer sides of the outer surface; Is formed so that a mounting opening that covers the horizontal piece of the seat receiving portion from the left and right outer sides and the lower side is opened rearward, and the seat outer shell is supported by the horizontal piece of the seat receiving portion to move back and forth. A configuration to
The seat outer shell is smoothly moved back and forth by a sliding portion to which a lubricant is applied, and the sliding portion of the mounting opening in the seat outer shell has a portion below the horizontal piece in the seat receiving portion. The longitudinal longitudinal lubricant receiving part that receives the lubricant that has fallen below the horizontal piece from the moving part without leakage is formed so as to approach the left and right side surfaces of the seat receiving part,
Rocking chair.

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