JP2014097151A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability of arranging a wire cable for operating an actuating mechanism in a chair.SOLUTION: A chair is provided with an actuating mechanism for actuating a seat or a backrest, an armrest frame 40 disposed at the lower part of the backrest or at the seat, having at least a mounting base part, a rear side part 40b and an upper side part 40a, and an operation lever 50 disposed at the armrest for operating the actuating mechanism, and includes an upper cover body 41 for the armrest attachable to and detachable from the upper side part 40a of the armrest frame 40. The middle part of a wire cable 70 for transmitting operation force to the actuating mechanism from the operation lever is arranged along a first guide passage between the upper side part of the armrest frame and the upper cover body, and a second guide passage between the rear side part of the armrest frame and the lateral side part of the backrest contacting the rear side part of the armrest frame.

Description

  The present invention relates to a chair provided with an operating mechanism for operating a movable part such as a backrest or a seat. More specifically, the present invention relates to a wire connected to an operation lever for operating locking and unlocking for the back tilt of the backrest ( The present invention relates to a chair in which a wire is inserted into the inner diameter portion of the cable conduit and is also referred to as a wire cable hereinafter.

  Conventionally, the magnitude of the resistance of the spring means that locks and unlocks the back tilt of the chair back and provides resistance to the back tilt of the back (that is, the magnitude of the reaction force of the back acting on the body during locking). In order to adjust the elasticity adjusting means to be changed, various chairs having an operation unit on the elbow of the chair have been proposed (Patent Documents 1, 2, and 3).

  In patent document 1, the drive member which operates the action | operation piece of the hydraulic cylinder which raises / lowers the seat of a chair, and the armrest part (upper member extended before and behind an armrest) among the loop-shaped armrests standing by the side of the chair seat ) And the operation piece disposed on the lower side of the hollow portion are connected by a wire inserted from the hollow portion of the upper member of the loop armrest into the hollow portion of the seat through the rear hollow portion. .

  In Patent Document 2, an operating body (finger-holding lever) for operating a backrest locking mechanism or a seat height adjusting mechanism is activated by an inner diameter of a loop armrest (also referred to as a circular elbow in a side view). A wire that is provided on the lower surface side between the inner and outer cover bodies that are L-shaped when viewed from the side and that is connected to one end of the operating body (finger hanging lever) passes through the gap between the inner and outer cover bodies. The end is connected to the actuating mechanism.

  On the other hand, in Patent Document 3, a side view-shaped (annular) armrest made of a hollow pipe is erected on the side of the chair seat, and an operation lever is provided on the lower surface side of the upper side of the armrest. In order to operate the gas cylinder, the middle part of the wire cable having one end connected to the operation lever is inserted into the hollow pipe of the armrest.

Japanese Utility Model Publication No. 62-040951 JP 2007-105293 A JP 63-038410 A

  In the above Patent Documents 1 and 3, since the wire cable is disposed through the hollow pipe, the distance from the entrance to the exit of the wire cable in the hollow pipe is long, and the middle of the pipe is curved. There was a problem that it took time and effort to insert.

  As in Patent Document 2, it is necessary to separately provide an inner and outer cover body having a reverse L-shape in side view on the inner diameter portion of the loop armrest (circular elbow in side view), and the number of parts is increased. There was also a problem that it took a lot of time for installation and was restricted by the design of the side view of the loop armrest.

  The present invention has been made in view of such a current situation, and an object of the present invention is to provide a chair with improved design and improved workability in handling a wire cable. In addition, many improvements are disclosed in the present application, and it can be an object to provide these improvements. For example, this includes making it possible to increase the mounting strength of the elbow.

  The present invention includes the structures of the claims. Of these, the invention of claim 1 is a high-level concept, comprising a seat, a backrest, an operating mechanism provided in a base that supports the seat and operating the seat or the backrest, and a lower portion of the backrest Alternatively, the chair is provided with an elbow provided at the seat and having at least a mounting base, a rear side, and an upper side, and an operation lever provided on the elbow and for operating the operation mechanism. Comprises an elbow frame and at least an upper cover body for elbow rest that can be attached to and detached from the upper side of the elbow frame, and a midway portion of the wire cable that transmits an operating force from the operating lever to the operating mechanism includes: A first guide path between the upper side of the elbow frame and the upper cover body, and a second guide path between the rear side of the elbow frame and the side part of the backrest contacting the elbow frame. What That.

  The invention of claim 2 embodies claim 1, and in claim 1, the upper and rear sides of the elbow frame are provided with the first and second guide passages on the peripheral surface of the elbow frame. And is formed so as to open to the outer peripheral surface, and the finger hook portion of the operation lever is disposed on the lower surface side of the upper side portion of the elbow frame, and is connected to one end of the wire cable in the operation lever. The portion communicates with the first guide passage.

  The invention of claim 3 embodies claim 1 or 2, wherein the wire cable for transmitting the operating force from the operating lever to the operating mechanism is fitted in the both guide passages, and the left and right sides of the backrest. The part has a connecting part that can be attached to and detached from the rear side part of the elbow frame.

  According to a fourth aspect of the present invention, the chair according to the third aspect of the invention is suitably embodied, and the connecting portion is interposed between the upper portion of the front surface of the outer waist member and the lower back portion of the back plate constituting the backrest. It is an edge part in the strip | belt-shaped reinforcement member inserted.

  The present invention includes a seat, a backrest, an operating mechanism provided in a base that supports the seat to operate the seat or the backrest, a lower portion of the backrest or the seat, and at least a mounting base and a rear A chair provided with an elbow having a side portion and an upper side portion and an operation lever provided on the elbow to operate the operating mechanism, wherein the elbow includes at least an elbow frame and at least an upper side portion of the elbow frame. An elbow rest upper cover body that can be attached to and detached from, and a middle portion of the wire cable that transmits the operating force from the operating lever to the operating mechanism is between the upper side of the elbow frame and the upper cover body. And the second guide path between the rear side part of the elbow frame and the side part of the backrest in contact therewith. Therefore, it becomes easy to form a gap between the peripheral surface of the elbow frame and the inner surface of each cover body, or between the open surfaces of the first and second guide passages, and the first and second of the peripheral surface of the elbow frame. Arrangement work of parts and members such as a wire cable in the guide passage becomes easy.

  According to a second aspect of the present invention, the first and second guide passages are formed along the peripheral surface of the elbow frame and open to the outer peripheral surface at the upper and rear sides of the elbow frame. Has been. Therefore, the wiring work of the wire cable to the opened first and second guide passages is further facilitated as compared with the closed one such as the inside of the hollow pipe in which the conventional guide passages are continuous.

  In addition, a finger hook portion of the operation lever is disposed on the lower surface side of the upper side portion of the elbow frame, and a connection portion of the operation lever with one end of the wire cable communicates with the first guide passage. Therefore, the operation of connecting one end of the wire cable to the operation lever can be facilitated.

  According to a third aspect of the present invention, the wire cable for transmitting the operating force from the operating lever to the operating mechanism is fitted into the both guide passages, and the left and right sides of the backrest are arranged behind the elbow frame. Since it has a detachable connecting part with the side part, when attaching the elbow to the left and right side parts of the backrest, the middle part of the wire cable between the left and right side parts of the backrest and the rear side part of the elbow frame It becomes easy to make it invisible from the outside.

  In the invention of claim 4 of the present application, the connecting portion is an end portion of a belt-shaped reinforcing member inserted in an overlapping portion between the front upper portion of the waist outer member and the back lower portion of the back plate constituting the backrest. The strength of the backrest can be increased and the connection with the elbow can be performed at the same time.

(A) is a front view of the chair which concerns on 1st Embodiment, (B) is a right view, (C) is a top view. It is a perspective view from the lower right side of the whole chair. It is the perspective view from the lower right side which removed the leg part and cushion body of the chair. It is a disassembled front side perspective view of a support mechanism part, a waist outer member, a back plate, and a reinforcing member. It is a front side perspective view showing a support mechanism part, a looped elbow, a waist outer member, a partially cut back plate, an exploded upper cover body, and a front cover body. It is a front side perspective view in the state where left and right loop elbows were attached to the backrest. It is a partially cutaway side sectional view of a state in which the backrest in a half-split state is attached to the support mechanism. It is a perspective view of a support mechanism part, a half-shaped backrest, a reinforcing member, a back plate, and a loop-shaped elbow. (A) is a perspective view from the side of an operation lever, (B) is a perspective view from the front left, (C) is a perspective view from the front right. (A) is an enlarged cross-sectional view taken along line XA-XA in FIG. 8, (B) is an enlarged cross-sectional view taken along line XB-XB in FIG. 8, and (C) is an enlarged cross-sectional view taken along line XC-XC in FIG. It is. (A) is a perspective view from above of the left elbow frame, (B) is a perspective view from the front left, and (C) is a perspective view from the lower left. It is the perspective view which looked at the state which decomposed | disassembled the elbow of the right-and-left both sides into the elbow frame, the upper cover body, and the front cover body from the downward direction.

  Next, an embodiment of the present invention will be described with reference to the drawings. First, the first embodiment shown in FIGS. 1 to 8 will be described. In the following description, the words “front and rear” and “left and right” are used to specify the direction, but the words on the front and rear and right and left are based on the person who is seated. The front view direction is the direction facing the seated person, and therefore the left and right in the front view are opposite to the left and right viewed from the seated person.

[Outline of the chair]
First, an outline of the chair will be described mainly based on FIGS. This embodiment is applied to a swivel chair often used for office work or the like. As shown in FIG. 1, the chair includes a seat 1, a backrest 2, and legs 3.

  The leg 3 includes a gas cylinder 4 as a pedestal and a plurality of branch rods 5 that support the cylinder and extend radially. A caster 6 is attached to the tip of each branch rod 5. Therefore, this embodiment is applied to a swivel chair in which the height of the seat 1 and the backrest 2 can be adjusted.

  A base 7 as an example of a seat receiving member is fixed to the upper end of the gas cylinder 4. For example, as shown in FIGS. 1, 2, and 8, an intermediate metal fitting (seat receiving metal fitting) 8 made of a metal plate is disposed on the base 7, and a resin seat outer member 9 is attached to the intermediate fitting 8. It is attached.

  The seat 1 has a resin seat outer member 9 and a seat cushion material 10 disposed on the upper surface thereof, and the seat cushion material 10 is covered from above with a skin material such as a cloth.

  As shown in FIGS. 1 and 2, the backrest 2 has a resin outer waist member 11, a resin back plate 12, and a back cushion body (not shown) attached to the front surface. It is completely covered with a bag-shaped surface assembly 13. Further, looped elbows 14 are provided on both the left and right sides of the seat 1.

  In this embodiment, the present invention is applied to a rocking chair (a chair whose backrest tilts backward), but needless to say, it may be applied to a chair that does not rock.

[Outline of support mechanism]
In the present embodiment, for example, as shown in FIGS. 4, 6, and 8, a back support frame 15 is connected to the base 7 so as to be able to tilt backward, and the backrest 2 is attached to the back support frame 15. . The back support frame 15 is made of resin or aluminum die-cast, and as shown in FIGS. 6 and 8, a base portion 15a spreading in the left-right direction behind the base 7, and an outer position of the base 7 from both left and right sides of the base portion 15a. The front end portion of the left and right arm portions 15b is connected to the base 7 by a horizontally long first shaft 16 (see FIGS. 3 and 7). Accordingly, the backrest 2 tilts around the axis of the first shaft 16.

  The front portion of the left and right arm portions 15b in the back support frame 15 is a crank portion (not shown) that enters the left and right inner sides, and the first shaft 16 penetrates the base end portion of the crank portion. Further, the front ends of the left and right crank parts are integrally connected by a horizontally long push shaft (not shown) as an example of a pressing part for pressing a locking spring of an elasticity adjusting unit (not shown).

  The back support frame 15 tilts backward about the first shaft 16. Therefore, an elasticity adjustment unit (not shown) is provided inside the base 7 to provide resistance to the backward tilting of the back support frame 15. Note that the elasticity adjusting unit and the locking gas cylinder 18 are not the main components of the present invention, and a detailed description thereof will be omitted. The elasticity adjusting unit is for adjusting the magnitude of the resistance to locking stepwise or steplessly, and the locking gas cylinder 18 shown in FIGS. 4 and 6 holds the backrest 2 at an arbitrary rearward tilt angle. Or a locking device for unlocking.

  The chair according to the present embodiment is a synchro-type chair in which the seat 1 is retracted in conjunction with the backward inclination of the backrest 2, and the front portion of the intermediate bracket 8 can be moved backward to the front portion of the elasticity adjusting unit. The rear part of the intermediate fitting 8 is connected to a bracket part 20 projecting upward from the back support frame 15 by a second horizontally elongated second shaft (not shown). Further, the front portion of the intermediate fitting 8 is held so as not to move upward and is slidable back and forth with respect to the base 7. For this reason, even if the front part of the seat 1 is lifted up, the intermediate fitting 8 does not come off the base 7.

  The backrest 2 includes a waist outer member 11, a back plate 12, and a belt-shaped reinforcing member 21, and the waist outer member 11 is a shell body that is curved in a substantially L shape in a side view. A connecting portion 17 that protrudes forward is integrally formed at the lower end of the waist outer member 11, and a pair of left and right engaging portions 17a are provided on the connecting portion 17, and the pair of engaging portions 17a are connected to the back. The support frame 15 is fitted into the concave engaged portion 15c on the lower surface of the rear portion of the support frame 15, and positioning in the left and right and front and rear directions is performed. The bolt mounting portion 17b of the connecting portion 17 and the bolt mounting portion 15d at the rear of the back support frame 15 are bolted (not shown). However, in FIGS. 7 and 8, only the left half of the waist outer member 11 and the back plate 12 is shown.

[Lumbar outer member and back plate and connecting structure]
On the upper front surface of the waist outer member 11, a recess 22 (vertical dimension H1) into which the belt-like reinforcing member 21 having the vertical dimension H1 is fitted so as not to be displaced in the vertical direction is formed to extend to the left and right sides (see FIG. 4). In addition, a plurality of (two in the embodiment, two on the left and right) claws 22a protrude from the front surface of the waist outer member 11 on the lower end side of the recess 22 (see FIGS. 4 and 5), thereby forming a recess. The dropout of the reinforcing member 21 fitted in the place 22 can be prevented.

  The left and right side end portions of the reinforcing member 21 form a bent portion 21a once bent to the rear side, and then the end portion 21b extends from the rear end of the bent portion 21a to the left and right side outer sides (see FIG. 4). The bent portion 23a and the end portion 23b are similarly formed on the left and right outer sides from the recess 22 of the waist outer member 11 so that the bent portion 21a and the end portion 21b of the reinforcing member 21 can be attached from the front. (See FIGS. 4 and 5).

  A pair of left and right female screw portions 24 are formed at the left and right central portions of the reinforcing member 21, and the reinforcing member is screwed from the front side of the back plate 12 with screws 26 through screw mounting holes 25 formed in the back plate 12. 21 is connected and fixed (see FIG. 4). On the other hand, the reinforcing member 21 is connected and fixed by a screw 28 from the rear surface side of the waist outer member 11 through screw mounting holes 27 formed at both ends 23b of the waist outer member 11 (FIGS. 2, 4, and 5). reference). As a result, the reinforcing member 21 is inserted between the front and rear overlapping portions of the back plate 12 on the front side and the outer waist member 11 on the rear side to be firmly connected and fixed.

  Further, a forward projecting ridge portion 29 formed at the lower end of the back plate 12 is placed on a step portion 30 formed on the front surface of the lower portion of the waist outer member 11. On the other hand, a plurality of positioning holes 32 opened downward are formed in a step portion 31 formed on the back surface (rear surface) side of the back plate 12 located above the reinforcing member 21 (see FIG. 7). On the upper end of the waist outer member 11, upward projections 33 (five places in the embodiment) that fit into the positioning holes 32 are integrally formed (see FIGS. 4 and 5). By these fittings, the waist outer member 11 and the back plate 12 are firmly connected and fixed without being displaced, and further, both the back surfaces of the waist outer member 11 and the back plate 12 are substantially flush with each other. They can be connected (see FIG. 2, FIG. 7, etc.).

  The loop elbow 14 (which is an example of the elbow of the present invention) is made of aluminum die cast and includes a loop elbow frame 40, an upper cover body 41, and a front cover body 42. The loop-shaped elbow frame 40 is formed in a loop shape by integrating an upper side portion 40a, a rear side portion 40b, a front side portion 40c, and a mounting base portion 40d as a lower side portion.

  A connecting tube portion 45 that protrudes inward is provided at the lower portion (mounting base portion 40d) of the loop elbow frame 40. The connecting cylinder part 45 is fitted through the same triangular supplement part 46 which is added to the connection base part 44 having a triangular hole provided on the outer surface of the arm part 15 a of the back support frame 15, and connected to the supplement part 46. The elbows 14 are erected on the left and right sides of the back support frame 15 by screwing them together in a state in which the tube portion 45 is fitted (see FIGS. 4, 5, and 8). The supplementary shaft portion 46 may be formed integrally with the connection base portion 44 or the connection tube portion 45, or the relationship between the tube portion and the shaft portion may be opposite to that of the illustrated embodiment.

  The left and right end portions 21b of the reinforcing member 21 are formed so as to extend to the tip end portions of the wing portions 34 on the left and right sides of the back plate 12 when the reinforcing member 21 is attached to the back plate 12. Along the back. And the edge part 21b of the reinforcement member 21 is made to contact | abut to the inner surface of the loop-shaped elbow frame 40 in the state which removed the upper cover body 41 in the said standing elbow 14. FIG. Next, a screw is inserted through a screw attachment hole 36 provided at the tip of the wing portion 34 and the like and a through hole 37 at the end 21 b of the reinforcing member 21, and the screw is inserted into the female screw portion 43 of the loop elbow frame 40. By fastening, the loop elbow frame 40, the end 21b of the reinforcing member 21, and the tip of the wing 34 of the back plate 12 are fastened together.

  With these attachments, the elbow 14 is fixed to the lower part and the rear part with respect to the backrest 2, so that the elbow 14 is connected and fixed more firmly than the connection of only the lower part.

  Also, as shown in FIG. 4 and FIG. 9B, a plurality of upper and lower engaging recesses 38 are formed on the concave and curved end surfaces of the left and right sides of the waist outer member 11, and the rear curved vertical length of the looped elbow frame 40 is formed. Engagement protrusions 39 are provided at a plurality of positions on the outer surface of the side.

  When the outer surface of the rear curved vertical side of the looped elbow frame 40 is brought into contact with the concavely curved end surfaces of the left and right sides of the waist outer member 11, the respective engagement recesses 38 and the engagement protrusions 39 are fitted and engaged with each other. Will not be displaced. The engaging protrusions may be provided in the waist outer member 11 and the engaging recesses 38 may be provided in the looped elbow frame 40, respectively.

  The wing part 34, the end part 21b of the reinforcing member 21 and the screwing part are hidden on the inner surface of the rear part of the upper cover body 41 attached to the looped elbow frame 40 (see FIGS. 3 and 8). Therefore, in appearance, the sense of unity between the backrest 2 and the looped elbow 14 is further improved.

  If the chair is not a rocking chair, the connecting base 44 may be provided on the outer surface of the base 7 or the seat receiver.

[Upper cover body and front cover body]
The upper cover body 41 is formed in an L-shaped cross section so as to cover the upper surface of the looped elbow frame 40 and the corresponding inner side surface (side facing the side surface of the person to be seated). The loop-shaped elbow frame 40 is formed in an L-shaped cross section so as to cover the front surface and the corresponding inner side surface (side facing the side surface of the person to be seated). The upper cover body 41 and the front cover body 42 are detachably attached to the loop elbow frame 40, respectively (see FIGS. 5, 10, and 12).

  Both the upper cover body 41 and the front cover body 42 are preferably made of a synthetic resin or aluminum die-cast material having a small friction coefficient. The upper cover body 41 has an upper plate portion 41a for covering at least the upper side portion 40a of the looped elbow frame 40 and an inner plate portion 41b for covering the inner surface side of the chair. And the engaging part 65 in which the engaging claw 41c (refer FIG. 12) of several places which protrudes inward from the inner surface of the upper board part 41a and the inner side board part 41b was recessedly formed in the place corresponding to the loop elbow frame 40 is formed. (See FIGS. 11B and 11C). Similarly, the front cover body 42 has an upper surface plate portion 42a and an inner side surface plate portion 41b, and an engagement portion 66 (not shown) is formed with a recess at a position corresponding to the loop elbow frame 40 (FIG. 11C Engage).

  As described above, the upper cover body 41 is formed in an L-shaped cross section so as to cover the upper surface of the looped elbow frame 40 and the corresponding inner side surface (the side facing the side of the person to be seated). The cover body 42 is formed in an L-shaped cross section so as to cover the front surface of the looped elbow frame 40 and the corresponding inner side surface (side facing the side of the person to be seated). It becomes easy to form a gap between the surface and the inner surface of each cover body 41, 42, or between the open surfaces of the first and second guide passages 53, 54, and the first circumferential surface of the looped elbow frame 40 The arrangement work of parts and members such as the wire cable 70 to the second guide passages 53 and 54 is facilitated. Further, by making the materials and colors of the looped elbow frame 40 and the cover bodies 41 and 42 different, the texture and colors of the elbow 14 can be varied and the design of the chair or elbow 14 can be diversified.

  Further, when the outer surface of the upper cover body 41 or the front cover body 42, particularly the inner side surface (the side facing the side surface of the person to be seated) is covered with a cushion body, the feeling of hitting the outer surface of the seated person's flank or thighs Is preferable because it is much softer and warmer than that made of metal.

  A repelling piece 67 (in the embodiment, a loop shape or a belt shape) made of an elastic material such as rubber or sponge is attached to one or both of the inner surfaces of the cover bodies 41 and 42 and the outer peripheral surface of the looped elbow frame 40 or If they are integrally formed, it is possible to prevent rattling of engagement between the cover bodies 41, 42, the loop elbow frame 40, the engaging claws and the engaging portion.

[Control lever and wire cable]
An operating mechanism for operating the seat 1 or the backrest 2 is provided in the base 7 that supports the seat 1, and the operation lever 50 is provided at the lower part of the backrest 2 or the seat and on the elbow 14 having at least an upper side portion. It is provided for operating the operating mechanism.

  Examples of the operation mechanism described in the claims are, for example, the elasticity adjusting unit (not shown) described in the present embodiment, and a locking device for holding the backrest 2 at an arbitrary rearward tilt angle or releasing the lock. There is a gas cylinder 18 for locking or a gas cylinder 4 for adjusting the height of the seat 1.

  In the present embodiment, the operating lever 50 for operating the activation of the operating mechanism is disposed on the upper side of the looped elbow 14 on both the left and right sides, and the finger rest 51 of the operating lever 50 is exposed on the lower surface side of the upper side. doing.

  A wire cable 70 for transmitting an operating force from the operating lever 50 to the operating mechanism has a cable conduit 72 through which a locking ball 73 is fixed at the tip of a wire 71 and the wire 71 is inserted. An engagement recess 60 that can be engaged with the locking ball 73 of the wire cable 70 is formed in a front portion of the mounting groove 59. The wire 71 extends rearward from the mounting groove 59 and is inserted into the cord 72 at the tip of the first guide passage 53 (see FIG. 9B).

[Wire cable routing]
The midway portion of the wire cable 70 includes a first guide passage 53 between the upper side portion 40a of the looped elbow frame 40 (an example of an elbow frame in the claims) and the upper cover body 41, and the rear of the looped elbow frame 40. It arrange | positions along the 2nd guide path 54 between the side part 40b and the side part 55 (it shows in FIG. 6 and corresponds to the vicinity of the line part 13c mentioned later) of the backrest 2 which contact | connects this. In this case, the outer peripheral surface and the inner side surface of the rear side portion 40b of the looped elbow frame 40 and the second guide passage 54 are hidden by the wing portion 34 of the back plate 12 (FIGS. 6 and 7). On the outer surface of the chair, the elbow frame 40 can be seen in a loop (see FIGS. 1C, 2 and 3).

  As shown in FIGS. 2, 7, 9 (A) to 9 (C), and 10 (A), the operation lever 50 is integrally formed with a finger hook portion 51 having an L-shaped cross section at the lower portion of the base portion 56. It is formed and is arranged so that the free end of the finger rest part 51 faces the inside of the chair. A shaft 58 having a circular cross section facing outward is formed at the lower end of a bifurcated arm 57 extending downward from the base 56 forward. In addition, a mounting groove 59 that opens to the front and rear and upward is formed in the upper surface of the base portion 56. 9A and 9C is for the right elbow 14, and the operation lever 50 shown in FIG. 9B is for the left elbow 14.

  As shown in FIGS. 10 and 11, the upper side portion 40 a of the looped elbow frame 40 is formed with a mounting hole 61 penetrating vertically. A first guide passage 53 is formed in the upper side portion 40 of the loop elbow frame so as to extend forward and rearward along the peripheral surface of the loop elbow frame and open to the outer peripheral surface. It communicates with the mounting hole 61. The mounting hole 61 corresponds to a “connecting portion of the operation lever to one end of the wire cable” in the claims. The second guide passage 54 extends along the vertical direction of the rear side portion 40b of the looped elbow frame 40 and is open to the outer peripheral surface.

  The operating lever 50 inserts the shaft portion 58, both arms 57, and the base portion 56 into the mounting hole 61 from the lower side of the upper side portion 40a with both arms 57 facing forward. At this time, both arms 15 a are elastically deformed so that the dimension between the free ends (between the outer end surfaces) of both shaft portions 58 is slightly smaller than the narrow width dimension of the mounting hole 61. When both the arms 57 after being elastically restored, both shaft portions 58 of the operating lever 50 cannot be removed from the bearing portion 62 formed in a recess on the front side of the upper side portion 40 of the loop elbow frame and are pivotable. It is supported (see FIG. 10A, FIG. 10B, and FIG. 10C). The fixing metal fitting 74 at the distal end portion of the cable conduit 72 is fitted and fixed to the engaging portion 53 a at the distal end (front end) of the first guide passage 53. In addition, after the both arms 57 are elastically restored, if a regulating member (not shown) that regulates the elastic restoration is retrofitted between the internal surfaces of the both arms 57, the operating lever 50 is prevented from falling off from the mounting position. More preferred.

  In a state where the locking ball 73 at one end of the wire cable 70 is engaged with the operation lever 50 inserted into the mounting hole 61, the middle portion of the wire cable 70 is fitted into the guide passages 53 and 54 and extends. .

  The midway portion of the wire cable 70 includes a first guide passage 53 between the upper side portion 40a of the looped elbow frame 40 (an example of an elbow frame in the claims) and the upper cover body 41, and the rear of the looped elbow frame 40. It arrange | positions along the 2nd guide path 54 between the side part 40b and the side part 55 (it shows in FIG. 6 and corresponds to the vicinity of the line part 13c mentioned later) of the backrest 2 which contact | connects this. In this case, the outer peripheral surface and the inner side surface of the rear side portion 40b of the looped elbow frame 40 and the second guide passage 54 are hidden by the wing portion 34 of the back plate 12 (FIGS. 6 and 7). On the outer surface of the chair, the elbow frame 40 can be seen in a loop (see FIGS. 1C, 2 and 3).

  In the present embodiment, as shown in FIGS. 11A, 11B, and 11C, the first guide passage 53 extends along the circumferential direction of the looped elbow frame 40, and The second guide passage 54 extends along the circumferential direction of the looped elbow frame 40 and faces the outer peripheral surface on the inner side of the chair on the smaller radial side. Open. Therefore, the end of the first guide passage 53 and the start end of the second guide passage 54 communicate with each other through the longitudinal guide passage 63 along the radial direction of the looped elbow frame 40. The terminal end of the second guide passage 54 is connected to a notch groove 64 opened to the inner side surface at the lower end of the rear side portion 40b of the looped elbow frame 40.

  As shown in FIG. 6, the wire cable 70 that has come out of the notch groove 64 extends forward through the upper surface of the connecting portion 17 and the back support frame 15, and is connected to the operating mechanism in the base 7. Although not shown, at this time, the wire cable 70 is locked to the connecting portion 17 or the back support frame 15 with a clip or the like, or the wire holding portion is provided on the back side of the seat outer member 9 to lock the wire cable 70. If the path of the wire cable 70 is restricted by making the wire cable 70 visible, the wire cable is less likely to be exposed from the appearance, which is more preferable from an aesthetic point of view.

  The upper cover body 41 is put on the upper side portion 40a of the looped elbow frame 40 from the upper side and locked so as not to be removed. Since the tip of the regulating piece 80 protruding from the inner surface of the upper cover body 41 is close to or abuts on the upper surface of both shaft portions 58 (see FIG. 10C), both shaft portions 58 are fitted in the bearing portions 62. Only rotation is possible.

  Normally (when not in operation), as shown in FIG. 7, the finger-hanging portion 51 is substantially parallel to the lower surface of the upper side portion 40 a. The operation lever 50 can be rotated in the direction of arrow E in FIG. Thereby, since the wire 71 is engaged with the engagement recess 60, the wire 71 is pulled forward, and the operation mechanism is activated.

  When the finger hung on the finger hanging portion 51 is opened and weakened, the operation lever 50 is rotated in the direction of arrow F in FIG. 10C by its own weight to return to the pre-operation state. In this case, in the embodiment, the engagement recess 60 with which the locking ball 73 at one end of the wire 71 is engaged is engaged only in the wire pulling direction (left direction in FIG. 10C), and the operation lever 50 is engaged. Is rotated in the direction of arrow F, the engagement recess 60 is separated from the locking ball 73 and the wire 71 is in a free state. In addition, when an elastic body (not shown) is provided between the operation lever 50 and the operation lever 50 accommodating portion in the upper side portion 40a and the gripping force of the finger hook portion 51 is released, the operation lever 50 automatically moves to the position shown in FIG. C) may be rotated in the direction of arrow F to automatically return to the pre-operation state.

[Installation structure of the front body]
In a state where the waist outer member 11 and the back plate 12 are connected, a cushion body (not shown) such as rubber foam is stretched over at least the entire front surface of the back plate 12. After that, the front surface of the cushion body and the back surface portion of the waist outer member 11 and the back plate 12 are integrally covered with a bag-shaped surface body 13 made of synthetic leather, natural leather, cloth, or the like (FIG. 2, FIG. 3, see the two-dot chain line in FIG. 6, FIG. 7, and FIG. In this case, in this embodiment, a long separation edge is provided in the vertical direction at the center in the left-right direction on the back side of the backrest 2, and fasteners are provided on the upper and lower separation edges to open from the lower end of the bag-shaped outer cover 13. Thus, it is possible to facilitate the mounting and dismounting work of the front body 13.

  Further, as shown in FIG. 2, for example, as shown in FIG. 2, the lower end portion on the back side of the front body 13 covers the waist outer member 11, and then the curved line portion 13 a along the left and right side edges of the waist outer member 11 and the back plate 12. The wing portion 34 and the rear edge of the looped elbow 14 and the line portion 13b that fits into the gap between the upper surface are provided. As shown in FIGS. 7 and 8, for example, the lower end portion on the front side of the cover 13 is a line portion 13 c that fits into the gap between the front base portion of the wing 34 of the back plate 12 and the rear inner surface of the looped elbow frame 40. Then, after the front lower end of the cushion body is wrapped, the cushion body is fitted along the groove 35 formed between the forward projecting ridge portion 29 formed at the lower end of the back plate 12 and the step portion 30 of the waist outer member 11. A horizontal line portion 13d. In each line part 13a-13d, in the state which extended the wrinkle of the surface mounting body 13, you may fix with the staple which drives in with a tucker etc., You may stick with an adhesive agent.

  In the present invention, the elbow frame in the elbow 14 is attached to an upper side portion serving as an elbow rest portion on which an elbow of a seated person is placed, a rear side portion connected to the upper side portion, and a back support frame for the base 7 or the backrest 2 of the seat. Therefore, in addition to the looped elbow, the side view shape of the elbow 14 may be an upside down L shape. Moreover, the elbow 14 should just be equipped with the elbow frame 40 and the upper cover body for elbow pads which can be attached or detached with respect to at least the upper side part of this elbow frame.

[Summary]
As described above, according to the present invention, the elbow 14 includes the elbow frame and the upper cover body 41 for the elbow rest that can be attached to and detached from at least the upper side portion 40a of the elbow frame. The middle part of the wire cable 70 for transmitting the force includes the first guide passage 53 between the upper side part 40a of the elbow frame and the upper cover body 41, the rear side part 40b of the elbow frame, and the side of the backrest 2 in contact therewith. It arrange | positions along the 2nd guide passage 54 between parts. Therefore, it becomes easy to form a gap between the peripheral surface of the elbow frame 40 and the inner surfaces of the cover bodies 41 and 42 and between the open surfaces of the first and second guide passages 53 and 54. Arrangement of parts and members such as the wire cable 70 to the first and second guide passages 53 and 54 on the peripheral surface is facilitated.

  According to the second aspect of the present invention, the first and second guide passages are formed along the peripheral surface of the elbow frame and open to the outer peripheral surface at the upper side portion and the rear side portion of the elbow frame. . Therefore, the wiring work of the wire cable 70 to the first and second guide passages 53 and 54 that are opened is further facilitated as compared with a conventional closed guide passage such as the inside of a hollow pipe.

  In addition, the finger hook portion 51 of the operation lever 50 is disposed so as to be exposed on the lower surface side of the upper side portion of the elbow frame, and the connection portion of the operation lever with one end of the wire cable communicates with the first guide passage. The operation of connecting one end of the cable to the operation lever can be easily performed.

  According to the invention of claim 3, the wire cable for transmitting the operating force from the operating lever to the operating mechanism is fitted in both guide passages, and the left and right side portions of the backrest are connected to the rear side portion of the elbow frame. Because it has a detachable connecting part, when the elbow is attached to the left and right side parts of the backrest (when connected), the middle part of the wire cable between the left and right side parts of the backrest and the rear side part of the elbow frame The part can be arranged, and it becomes easy to hide from the outside.

  In the invention of claim 4 of the present application, the connecting portion is an end portion of a belt-like reinforcing member inserted into an overlapping portion between the front upper portion of the waist outer member and the back lower portion of the back plate constituting the backrest. While the thickness of the connecting portion can be reduced, the strength of the connecting portion can be increased and the connection with the elbow can be performed at the same time.

  The present invention can be embodied in various ways other than the above embodiment. For example, the application target is not limited to a movable swivel chair, but can also be applied to a fixed chair such as a theater chair. Various forms can be adopted as necessary for the structural member such as the base. Furthermore, the elbow 14 can be applied to a chair of a type formed not in a loop shape but in an upside down L shape.

  The present invention can be embodied in a chair. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Seat 2 Back 11 Lumbar outer member 12 Back board 13 Outer body 14 Elbow 15 Back support frame 21 Reinforcement member 40 Loop elbow frame 41 Upper cover body 50 Operation lever 53 1st guide path 54 2nd guide path 61 Mounting hole 70 Wire cable

Claims (4)

A seat, a backrest, an operating mechanism provided in a base that supports the seat to operate the seat or the backrest, a lower portion of the backrest or the seat, and at least a mounting base, a rear side, and an upper side A chair provided with an elbow having a portion and an operation lever provided on the elbow to operate the operating mechanism,
The elbow includes an elbow frame and at least an upper cover body for an elbow rest that can be attached to and detached from the upper side of the elbow frame;
The middle part of the wire cable that transmits the operating force from the operating lever to the operating mechanism includes a first guide path between the upper side of the elbow frame and the upper cover body, a rear side of the elbow frame, and The chair arrange | positioned along the 2nd guide passage between the side parts of the said backrest which touch. The upper and rear sides of the elbow frame are formed with the first and second guide passages extending along the peripheral surface of the elbow frame and opened to the outer peripheral surface,
A finger hooking portion of the operation lever is disposed so as to be exposed on a lower surface side of an upper side portion of the elbow frame, and a connection portion between the operation lever and one end of the wire cable communicates with the first guide passage. Item 1. The chair according to Item 1.   A wire cable for transmitting an operating force from the operating lever to the operating mechanism is fitted into the both guide passages, and the left and right side portions of the backrest are detachable connecting portions with the rear side portion of the elbow frame. The chair according to claim 1, comprising: 4. The chair according to claim 3, wherein the connecting portion is an end portion of a belt-shaped reinforcing member that is inserted in an overlapping portion between a front upper portion of a waist outer member and a back lower portion of a back plate constituting the backrest.

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