Chairs and their arms

Abstract

To provide an arm rest which facilitates mounting and manufacturing while keeping good appearance of an elbow pad and excellent mounting strength.SOLUTION: An arm rest 4 comprises an elbow receiving part 11 integrally molded on a back rest 3 and an elbow pad 12 which is superposed and fixed on an upper surface of the elbow receiving part. In a rear end of the elbow pad 12, an engaging hole 21 opened in a horizontal direction is opened, an engaging metal fitting 19 is fixed in a recessed place 13 of the elbow receiving part 11 by a screw 20, and an engaging piece 19c provided on the engaging metal fitting 19 is fit in the engaging hole 21 of the elbow pad 12. Since a rear end of the elbow pad 12 is held in a manner not to move upward, the elbow pad is firmly fixed by fixing a front end part with one screw 22. Since the engaging metal fitting 19 is a member separated from the elbow receiving part 11, an undercut part as an engaging means is not required on the elbow receiving part 11. Therefore, manufacturing the back rest 3 is easy.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a chair. and This is about armrests. do. [Background technology]

[0002] It is common for chairs to have armrests. There are various types of armrest structures, and it is common to use an elbow pad made of a soft material for the part where the elbow rests. There are also various types of elbow pad attachment structures, and Patent Document 1 discloses that in a lift-up armrest, the elbow pad is fixed to the armrest receiver with four screws. That is, four female screw holes that open downward are formed in the elbow pad, and the elbow pad is fixed to the armrest receiver by inserting screws into the female screw holes from below into the armrest receiver.

[0003] Patent Document 2 also discloses that a number of cylindrical bosses are formed on the upper surface of the armrest support, while plugs that fit into the bosses are provided on the underside of the elbow pad, and the plugs are press-fitted into the bosses so that they cannot be removed. In Patent Document 2, the plugs are formed with a sawtooth cross section, so that they can be driven in but cannot be removed.

[0004] On the other hand, Patent Document 3 discloses that in a case where the upper half of an elbow support made of a round pipe is formed into an inclined portion that decreases in height toward the front, and the front part of the elbow pad is also formed into an inclined portion so as to be L-shaped in side view, a screw tube protruding rearward into the inclined portion of the elbow pad is passed through the inclined portion of the elbow support, and a screw that passes through the inclined portion of the elbow support from behind is screwed into the screw tube, while a downward-facing end surface is provided at the rear end of the elbow pad that overlaps with the rear surface of the elbow support, and a protrusion is provided on this end surface that fits into the rear end of the horizontal part of the elbow support.

[0005] That is, in Patent Document 3, the rear end of the elbow pad is held by a protrusion so that it cannot move up, down, left, or right, and the elbow pad is attached to the elbow support part by a single screw so that it cannot come off. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2000-333776 A [Patent Document 2] JP 2005-73786 A [Patent Document 3] Japanese Patent Application Publication No. 11-56524 Summary of the Invention [Problem to be solved by the invention]

[0007] Using screws as a fixing means, as in Patent Document 1, has the advantage of allowing the elbow pad to be firmly fixed to the elbow support part, but there is a problem that the screwing in process is cumbersome and assembly workability is poor because four screws are used in Patent Document 1.

[0008] On the other hand, in Patent Document 2, the elbow pad is strongly pressed against the elbow support. elbow The pad is then attached, but the elbow pad must be pressed firmly, which not only places a heavy burden on the worker if done manually, but also creates a problem in that the ease of attachment is in conflict with the function of preventing it from coming off.

[0009] In contrast, in Patent Document 3, the end face and the protrusion at the rear end prevent horizontal displacement, so it has the advantage of being able to be firmly fastened with only one screw. However, in Patent Document 3, it is necessary to form an inclined portion in the elbow support and the elbow pad, so it cannot be applied to armrests with flat upper surfaces, which causes a problem of lack of versatility.

[0010] The present invention was made in response to such a situation. [Means for solving the problem]

[0011] The present invention includes various configurations, typical examples of which are specified in claims 1 to 5. chair The present invention is directed to "Strength Member The backrest is molded integrally with the front and rear longitudinal arms. Receiving part and , the upper surface of the elbow support was attached to Long arm elbow It is equipped with pads, The above elbow Pad Rear end and the above elbow Receiving part Rear end In addition, elbow Pad horizontal direction When you move it to the left, it fits together. elbow Pad elbow An engagement part is formed to hold the receiving part in an inseparable manner. hand, The front end of the elbow pad is The fastener or the engagement means utilizing elastic deformation is used to elbow It is fixed to the receiver." In this basic configuration, The above elbow The engagement part of the receiving part is 、 The elbow The receiving portion is configured as a separate engaging member. elbow Fixed to the receiving part hand, The upper surface of the rear end of the armrest and the side surface of the backrest are smoothly continuous in a curved state. The following configuration has been added. The fastener may be a clip that is elastically deformable in addition to a screw. An example of an engagement means that utilizes elastic deformation is an engagement claw.

[0012] Claim 2 is an embodiment of claim 1, "The engaging member is a metal plate engaging fitting, and the screw is used to fasten the elbow A base piece fixed to the receiving portion; elbow pad of It consists of an engagement piece into which the engagement portion fits, and an intermediate piece that connects the engagement piece and the base piece. The structure is as follows.

[0013] The invention of claim 3 teeth This is applied to armrests. An armrest having the same basic structure as claim 1.In "The rear end of the elbow pad is elbow pad of The engagement hole as the engagement portion is open in a substantially horizontal direction, The engaging portion of the elbow support is a metal fitting made of a metal plate that is separate from the elbow support, and the engaging fitting is composed of a base piece that is fixed to the elbow support by a screw, an engaging piece that fits into an engaging hole in the elbow pad, and an intermediate piece that connects the engaging piece and the base piece. " The structure is as follows.

[0014] The invention of claim 4 is an embodiment of claim 3, "The rear end of the armrest and the armrest pad are curved inward in a plan view toward the backrest, and the engagement hole opens toward the backrest." The structure is as follows.

[0015] The invention of claim 5 This also relates to an armrest, and in an armrest having the same basic structure as claim 1, " The engaging portion of the elbow support is a separate engaging metal fitting, and the engaging metal fitting is composed of a base piece fixed to the elbow support by a screw, an engaging piece into which an engaging hole of the elbow pad fits, and an intermediate piece connecting the engaging piece and the base piece, The outer periphery of the elbow pad and the elbow support are held in place by a rib and groove that fit together, and the front end of the elbow pad is fixed to the elbow support by a single screw that is inserted from below. The structure is as follows.

[0016] In the present invention, the engagement portion may be formed at only one location, or at multiple locations. Effect of the Invention

[0017] Original Application In the invention, elbow Pad The rear end is an engaging member or an engaging fitting. By elbow Since it is held in an inseparable manner from the receiving part, even if a fastening means such as a single screw or a snap engagement using an elastically deforming engagement claw is used, elbow The pad can be firmly fixed. elbow This allows efficient installation of pads and elbow It can be firmly fixed in place so that it will not come off from the receiving part.

[0018] And the engaging member , Engagement fitting teeth elbow Because it is separate from the receiving part, elbow Even if the receiving portion is an injection molded product made of synthetic resin or a die cast product made of aluminum or the like, it can be manufactured in a state that can be easily removed from the die without the need for so-called undercuts. The present invention So, elbow The receiving part can be easily manufactured, elbow The pad can be fixed firmly and efficiently. elbow Pad Front end but elbow It will not lift off the receiving part, elbow The pad's contour lines have been sharpened for an aesthetically pleasing appearance.

[0019] The shape of the engaging member can be arbitrarily set according to need. 2~4 By using a metal plate engaging fitting as shown in FIG. 1, it is possible to achieve a strong fixation despite its small size.

[0020] elbow Since the hanger is susceptible to external forces such as a person grabbing it with their hand and pulling it off, it is highly necessary to firmly attach the elbow pad to the elbow support so that it does not come off. Also, since it is long from front to back, it is highly necessary to attach it efficiently and firmly. By applying the present invention, these requirements can be met. The invention The true value is strongly demonstrated.

[0021] Integrating the armrest into the backrest simplifies the structure. In this case, since the armrest is located on the left and right outer sides of the seat in a plan view, forming the rear end of the armrest into an inward curved portion toward the backrest as in claim 4 increases the support area for the elbow and improves the stability of the elbow support.

[0022] Also, In claim 1, The upper surface of the elbow pad and the side of the backrest are continuous, which enhances the unity and continuity between the armrest and the backrest, resulting in a unified design and excellent aesthetics.Moreover, because the rear end of the elbow pad is fixed to the elbow receiving part via an engagement member, the edge of the inward curved part can abut against the side of the backrest without floating up, so that the upper surface of the elbow pad and the side of the backrest appear to be continuous without any boundary, maintaining a high aesthetic appearance.

[0023] Now, sometimes a person grabs the rear of the elbow pad to stand up, in which case the elbow pad is lifted up and the rear end of the elbow pad may be subjected to an action that tends to roll up. However, if the configuration of claim 4 is adopted, firstly, the elbow pad has an inwardly curved portion formed in its shape that is difficult to deform, making it difficult to roll up (the rear end edge of the elbow pad is also pressed against the backrest, making it difficult to roll up).

[0024] In addition, since the engaging member is positioned at the inwardly curved portion, the inwardly curved portion, which has high rigidity, is firmly connected to the elbow support portion, thereby further improving the anti-rolling effect.

[0025] When the elbow pad and the elbow support portion are engaged around almost the entire circumference as in claim 5, the elbow pad is held in place so that it cannot shift sideways. Therefore, even if the elbow pad is only hooked with the engaging member and fixed with a single screw, it can be firmly fixed around the entire circumference without rolling over. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 shows a chair according to an embodiment, in which (A) is a perspective view seen from the front, and (B) is a plan view. [Diagram 2] (A) is a front view and (B) is a side view. [Diagram 3] (A) is a view of the elbow pad turned upside down, and (B) is an exploded perspective view. [Figure 4] 3A is a cross-sectional view taken along the line IVA-IVA in FIG. 3A, FIG. 3B is a separated perspective view of the elbow pad and the engagement member in an upside-down state, and FIG. [Diagram 5] 13A and 13B are diagrams showing another example of an engaging fitting. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] (1) Basic structure of the chair Next, an embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1, the chair has a leg device 1, a seat 2, and a backrest 3, and an armrest 4 is provided on the left side of the backrest 3. The seat 2 can be flipped up and rotated with a part near its rear end as a fulcrum.

[0028] The leg device 1 comprises left and right front legs 5 tilted backward in side view, left and right hind legs 6 tilted forward in side view, and left and right long reinforcing frames 7 connecting the upper parts of the left and right front legs 5, and has a Z-shaped configuration when viewed from the left side (a human-shaped configuration when viewed from the right side).

[0029] A caster 1a is attached to the lower end of each of the legs 5, 6. The front legs 5 and the rear legs 6 are connected together via a joint 8. As shown in Fig. 1(A) and Fig. 2(B), the upper end portions 6a of the rear legs 6 are exposed above the joint 8, and downward opening boss portions 9 provided on the left and right ends of the backrest 3 are fitted and attached to the upper end portions 6a of the rear legs 6.

[0030] The front and rear legs 5, 6 and the reinforcing frame 7 are made of metal pipes such as steel pipes, and the joints 8 are cast products using metals such as aluminum, but die-cast products or resin molded products can also be used. The boss portion 9 is pressed and held to the upper portion 6a of the rear leg 6 by a screw. For this reason, as shown in Figure 3(B), the boss portion 9 is formed with a screw insertion hole 10 that opens toward the rear.

[0031] For example, as shown in Fig. 1(B), the left and right front legs 5 are parallel in plan view, while the left and right rear legs 6 are arranged so that the distance between them increases toward the rear. As can be seen from Fig. 2(A), the front legs 5 are arranged shifted left and right inward from the rear legs 6. The seat 2 is connected to the front legs 5 so that it can be rotated upward with a part near its rear end as a fulcrum, and when the seat 2 is flipped up and rotated upward, multiple chairs can be nested (interlocked) one behind the other.

[0032] The backrest 3 is a molded product of synthetic resin such as polypropylene, and has a left-right long shape with a forward-facing concave shape in plan view. The backrest 3 is basically in the form of a plate, and its upper end is formed into an upper flange piece 3a that curves backward. The upper flange piece 3a has a function of reinforcing the backrest 3, a function as a handle when moving it, and a design function.

[0033] (2) Armrest structure For example, as shown in Figure 3(A), the armrest 4 is composed of an armrest 11 formed integrally with both right side portions 3b of the backrest 3 and an armrest pad 12 attached to the upper surface of the armrest 11, and the boss portion 9 protrudes downward from the base of the armrest 11. Since the rear legs 6 are in a forward-leaning position, the boss portion 9 is also in a forward-leaning position. The armrest pad 12 is made of an elastomer or soft synthetic resin material.

[0034] 1(B), the armrest 4 is long from front to back, with the front end 4a and the rear end 4b formed in an arc shape. The armrest 4 is rounded from front to back and its width increases slightly toward the rear, but is slightly inclined in plan view so that it approaches the backrest 3 as it goes rearward.

[0035] In addition, since the elbow support portion 11 has a certain thickness from front to back, as can be seen from, for example, Figure 4(C), the left and right side portions 3b of the backrest 3 to which the elbow support portion 11 is continuous smoothly change in thickness, becoming thicker toward the elbow support portion 11, and the left and right side portions 3c of the backrest 3 become thinner toward the top from the connection portion with the elbow support portion 11.

[0036] The armrest 4 of this embodiment is larger in left-right width and front-to-back length than conventional chairs. The chair of this embodiment is a nestable simple type that is often used in lecture halls, etc., but even though it is a simple type chair, the armrest 4 is large and has a high-quality specification with an elbow pad 12.

[0037] The left-right width of the backrest 3 is approximately the same as that of the seat 2, while the armrest 4 is located on the outside of the left and right sides of the seat 2 in a plan view. Therefore, the rear end of the armrest 4 is curved toward the backrest 3 in a substantially J-shape. Therefore, the rear ends of the armrest support 11 and the arm pad 12 have inwardly curved portions 11a, 12a that face the backrest 3, and the tip of the inwardly curved portion 12a of the arm pad 12 The top surface of Backrest 3 side 3c and smooth when curved It is continuous.

[0038] As shown in Figure 3, an upwardly opening recess 13 is formed in the elbow support 11, and a group of lower inner ribs 14 are formed in the recess 13 and extend across it. The elbow support 11 is formed with an upwardly facing circumferential rib 15 except for the tip of the inwardly curved portion 12a, and the outer side of the circumferential rib 15 forms a step 11b. The upper end of the lower inner rib 14 is slightly lower than the upper end of the circumferential rib 15.

[0039] On the other hand, the underside of the elbow pad 12 is formed with a circumferential groove 16 that fits into the circumferential rib 15 of the elbow receiving portion 11, and an upper inner rib 17 that abuts against the lower inner rib 14 of the elbow receiving portion 11. Therefore, the elbow pad 12 is held in place so that it cannot shift horizontally by the fit between the circumferential rib 15 and the circumferential groove 16. In particular, in this embodiment, inwardly curved portions 11a, 12a are formed in the elbow receiving portion 11 and the elbow pad 12, preventing shifting not only in the left-right direction but also in the front-back direction.

[0040] As shown in Figures 3(B) and 4(C), the recess 13 in the elbow support part 11 becomes deeper towards the rear, and a cross-shaped support rib 18 is formed at the inwardly curved part 11a at a height shifted downward from the adjacent lower inner rib 17, and an engagement metal fitting 19 that holds the rear end of the elbow pad 12 so that it cannot move upward is fixed to the support rib 18 with a screw 20. It is also possible to fix the engagement metal fitting 19 directly to the bottom surface of the recess 13 in the elbow support part 11 with a screw 20 without forming the support rib 18 on the elbow support part 11.

[0041] The engaging fitting 19 is an example of an engaging member recited in the claims, and is composed of a horizontal base piece (lower horizontal piece) 19a fixed to the support rib 18 with a screw 20, an intermediate piece (standing piece) 19b rising from the base piece 19a, and an engaging piece (upper horizontal piece) 19c protruding outward in the left-right direction from the intermediate piece 19b. Since the engaging piece 19c and the base piece 19a face in the same direction, the engaging fitting 19 in this embodiment has a substantially U-shaped form.

[0042] On the other hand, the tip of the inward curved portion 12a of the elbow pad 12 is elbow pad of As an example of an engagement portion, an engagement hole 21 is formed which fits over the engagement piece 19c of the engagement fitting 19, and by fitting the engagement hole 21 into the engagement piece 19c, the rear end of the elbow pad 12 is held so that it cannot move upward (in this embodiment, the fit between the engagement hole 21 and the engagement piece 19c also serves to hold the inwardly curved portion 12a of the elbow pad 12 so that it cannot move back and forth).

[0043] 3, the tip of elbow pad 12 is fixed to elbow support portion 11 with a screw 22. Elbow support portion 11 and elbow pad 12 are formed with boss portions 23, 24 that overlap each other, elbow support portion 11 has a screw insertion hole 25, and elbow pad 12 has a female threaded hole 26.

[0044] (3) Summary As described above, in this embodiment, the circumferential groove 16 of the elbow pad 12 fits into the circumferential rib 15 of the elbow support portion 11 around almost the entire circumference, while the rear end of the elbow pad 12 is held in place by the engaging fitting 19 so that it cannot move upwards, so that even when fixed with a single screw 22, the elbow pad 12 can be firmly fixed in place so that it cannot roll up from the elbow support portion 11.

[0045] In particular, when inwardly curved portions 11a, 12a are provided on the elbow support portion 11 and the elbow pad 12 as in this embodiment, the engagement between the circumferential groove 16 and the circumferential rib 15 acts as a stopper to prevent the elbow pad 12 from moving forward and backward, so that even if there is some clearance between the screw 22 and the screw insertion hole 25, the elbow pad 12 can be kept in a state where it cannot shift forward, backward, or side to side.

[0046] In addition, because the elbow pad 12 is bent with an inwardly curved portion 12a, the rigidity of the rear portion is particularly high, making it difficult to roll up even though it is made of a soft material. In particular, in this embodiment, because the rear end of the elbow pad 12 is the inwardly curved portion 12a, when the elbow pad 12 tries to roll up, the rear end edge of the elbow pad 12 tends to push against the side surface 3c of the backrest 3, making it difficult to roll up from this surface as well.

[0047] The elbow pad 12 is attached by stacking the elbow pad 12 on the elbow support portion 11 and moving it horizontally. (Facing the side of backrest 3) and fitting the engagement hole 21 into the engagement piece 19c of the engagement fitting 19, then placing the elbow pad 12 on the elbow support part 11 and fitting the circumferential groove 16 into the circumferential rib 15, and then fastening the front end of the elbow pad 12 to the elbow support part 11 with the screw 22, so that the installation of the elbow pad 12 can be performed very easily.

[0048] Furthermore, the mold device for manufacturing the backrest 3 having the armrest support portion 11 is sufficient if it is configured with a main mold (the so-called cavity and core) that moves the backrest 3 relatively in the fore-and-aft direction, and a slide mold for forming the upper surface and recess 13 of the armrest support portion 11, and no slide mold is required for molding the portion corresponding to the engaging piece 19c of the engaging fitting 19 (undercut), so the backrest 3 integrated with the armrest support portion 11 can be easily manufactured at reduced costs.

[0049] In addition, the fitting 19 is made of a metal plate (steel plate) and has high strength, so it also has excellent fixing strength for the elbow pad 12. As shown in Fig. 4(A), in this embodiment, the middle piece 19b of the fitting 19 overlaps with the rear end inner surface 13a of the recess 13, so that the middle piece 19b is held unbendable even though it is thin. This provides an excellent posture-maintaining function for the elbow pad 12.

[0050] 4(A), the inwardly curved portion 12a of the elbow pad 12 is held immovable outward in the left-right direction by the circumferential groove 16 of the elbow pad 12 and the circumferential rib 15 of the elbow support portion 11, with the tip of the inwardly curved portion 12a abutting the inside surface of the recess 13, ensuring continuity between the upper surface of the elbow pad 12 and the side surface 3c of the backrest 3 and improving the aesthetic appearance. In this case, it is preferable to abut the tip of the inwardly curved portion 12a against the inside surface of the recess 13 while the elbow pad 12 is slightly elastically deformed, as this ensures the abutting state.

[0051] As shown in Fig. 4(A), in this embodiment, the inward curved portion 12a of the armrest pad 12 is raised toward the side surface 3c of the backrest 3, so that the upper surface of the inward curved portion 12a and the side surface 3c of the backrest 3 are continuous with each other in a curved and upwardly inclined position. Therefore, compared to when the upper surface of the inward curved portion 12a and the side surface 3c of the backrest 3 are perpendicular to each other, the unity between the armrest pad 12 and the backrest 3 is improved, improving the aesthetics.

[0052] In this embodiment, inwardly curved portions 11a, 12a are formed on the armrest 4, and the elbow pad 12 and elbow support portion 11 are integrated by fitting the circumferential groove 16 into the circumferential rib 16. With this configuration, when the elbow pad 12 is fitted into the elbow support portion 11, the inwardly curved portion 12a of the elbow pad 12 can be pushed against the side surface 3c of the backrest 3, which has the advantage of reliably keeping the rear end surface of the elbow pad 12 against the backrest 3, improving the aesthetic appearance.

[0053] The shape of the engagement fitting 19 can be embodied in various ways. For example, as shown in Fig. 5(A), it can be formed in a crank shape with the engagement piece 19c and the base piece 19a facing in opposite directions. Alternatively, as shown in Fig. 5(B), an engagement hole 27 can be formed in the middle piece 19b, and an engagement protrusion (not shown) that fits into the engagement hole 27 can be formed at the rear end of the elbow pad 12.

[0054] In this embodiment, the rear end of the elbow support 11 and the elbow pad 12 generally refers to the area where the inwardly curved portions 11a and 12a are formed, but the position of the engaging metal fitting 19 is not limited to the edge close to the backrest 3, and it can be placed anywhere in the curved area of ​​the elbow pad 12. Or Alternatively, they may be disposed at multiple locations on the rear end portion.

[0055] In this embodiment, the engagement fitting 19 of Although it is in contact with the rear end inner surface 13a of the recess 13, it is also possible to provide a space between the fitting 19 and the rear end inner surface 13a of the recess 13 and fit the downward wall at the rear end of the elbow pad 12 into this space. In other words, it is also possible to sandwich the downward edge (the downward wall or the downward rib) of the elbow pad 12 between the fitting 19 and the elbow support portion 11 (in this case, a downward claw can be provided on the elbow pad 12 and this claw can be engaged with the fitting 19).

[0056] Although the embodiment of the present invention has been described above, the present invention can be embodied in various other ways. For example, the elbow pad can be in various shapes, such as a simple rectangle or an oval shape that is long from front to back. The backrest can also be in various shapes, such as a shape with a padding material on the front, or a shape with openings on the front and back and a mesh material stretched over it. It is also possible to place an engaging member such as an engaging metal fitting on the front of the elbow support and fasten the rear of the elbow pad with a screw.

[0057] Furthermore, instead of using screws as a means for fixing the elbow pad, it is possible to form downward engaging claws on the elbow pad and engaging grooves on the elbow receiving part into which the engaging claws fit by deforming against their elasticity. When providing a circumferential rib and a circumferential groove as a means for preventing the elbow pad from slipping, it is also possible to form the circumferential rib on the elbow pad and the circumferential groove on the elbow receiving part. [Industrial Applicability]

[0058] The present invention can be embodied in a chair, and therefore has industrial applicability. [Explanation of symbols]

[0059] 2nd seat 3. Backrest 3c Side of backrest 4 Armrests 5,6 legs 9 Boss 11 Elbow support 11a Inward curve 12 Elbow pads 12b Inward curve (rear end) 13 Recess 15 Ribs 16 Circumferential groove 19 Engagement fitting (receiving part of Engagement part) 19a Base piece 19b Intermediate piece 19c Engagement piece 20 bis 21 Engagement hole ( elbow pad of Engagement part) 22 Bis

Claims

1. The seat back includes an armrest support portion in the longitudinal direction that is integrally formed with the backrest as a strength member, and an armrest pad in the longitudinal direction that is overlapped and attached to the upper surface of the armrest support portion. An engagement portion is formed at the rear end of the elbow pad and the rear end of the elbow support portion, which engages with the elbow pad when the elbow pad is shifted horizontally to hold the elbow pad in an inseparable state from the elbow support portion, A chair in which the front end of the armrest is fixed to the armrest support by a fastener or an engagement means utilizing elastic deformation, The engaging portion of the elbow support is composed of an engaging member separate from the elbow support and is fixed to the elbow support, The upper surface of the rear end of the armrest and the side surface of the backrest are smoothly continuous in a curved state. chair.

2. The engaging member is a metal plate-made engaging fitting, and is composed of a base piece fixed to the elbow support by a screw, an engaging piece into which the engaging part of the elbow pad fits, and an intermediate piece connecting the engaging piece and the base piece.

2. The chair according to claim 1.

3. The seat includes an armrest portion in the longitudinal direction that is integrally molded with the backrest as a strength member, and an armrest pad in the longitudinal direction that is layered on the upper surface of the armrest portion, An engagement portion is formed at the rear end of the elbow pad and the rear end of the elbow support portion, which engages with the elbow pad when the elbow pad is shifted horizontally to hold the elbow pad in an inseparable state from the elbow support portion, The armrest of a chair is fixed to the armrest support by a fastener or an engagement means utilizing elastic deformation at the front end of the armrest pad, The elbow pad has a rear end portion on which an engagement hole is formed, the engagement hole being an engagement portion of the elbow pad, and the engagement hole is opened in a substantially horizontal direction. The engaging portion of the elbow support is a metal plate engaging fitting separate from the elbow support, and the engaging fitting is composed of a base piece fixed to the elbow support by a screw, an engaging piece into which an engaging hole of the elbow pad fits, and an intermediate piece connecting the engaging piece and the base piece. Chair armrest.

4. The rear end of the armrest and the armrest pad is curved inwardly in a plan view toward the backrest, and the engagement hole is open in the direction toward the backrest. An armrest for a chair according to claim 3.

5. The seat back comprises an armrest portion in the longitudinal direction which is integrally formed with the backrest as a strength member, and an armrest pad in the longitudinal direction which is superimposed on the upper surface of the armrest portion, An engagement portion is formed at the rear end of the elbow pad and the rear end of the elbow support portion, which engages with the elbow pad when the elbow pad is shifted horizontally to hold the elbow pad in an inseparable state from the elbow support portion, The armrest of a chair is fixed to the armrest support by a fastener or an engagement means utilizing elastic deformation at the front end of the armrest pad, The engaging portion of the elbow support is a separate engaging metal fitting, and the engaging metal fitting is composed of a base piece fixed to the elbow support by a screw, an engaging piece into which an engaging hole of the elbow pad fits, and an intermediate piece connecting the engaging piece and the base piece, The outer periphery of the elbow pad and the elbow support part is held in place by a rib and a groove that fit together, and the front end of the elbow pad is fixed to the elbow support part by a single screw that is inserted from below. Chair armrest.

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