Folding chair

Abstract

To provide a foldable chair having a simple and elegant external appearance, where quality such as capability of securing silence in seat expansion is improved.SOLUTION: A leg device 2 has left and right leg frame bodies 7. The leg frame bodies 7 have four legs having horizontal upper frames 6, and the left and right upper frames 6 have their rear parts coupled by a beam material 8. A seat 1 comprises an outer shell 20 coupled to the beam material 8 via a support bracket 29. Cover members 16 that are long in front / back directions are mounted on the upper frames 6; contact members 26 that are made of soft material and are to be mounted on the cover members 16 are provided on left and right side parts of the outer shell 20. Because the cover members 16 can buffer impact at the time of falling rotation of the seat 1, damage of the upper frames 6 and generation of impact sound can be prevented.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a chair that can be folded by lifting and rotating the seat upward (flip-up rotation). [Background technology]

[0002] Folding chairs are designed so that multiple chairs can be fitted together front to back by raising the seat, rotating it, and folding it up, allowing for efficient use of storage space, and are therefore widely used for meetings and lectures.

[0003] In folding chairs, the leg device that supports the seat has left and right leg frame bodies, and the leg frame bodies are often formed in an inverted Y shape (a human shape or a square shape) when viewed from the side, as shown in Patent Documents 1 and 2. In this case, the entire leg frame body is exposed to the left and right outside of the seat, and the seat is supported by beams attached to the left and right front legs. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-90792 [Patent Document 1] Japanese Patent Application Publication No. 2019-63166 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional folded state as in Patent Documents 1 and 2, the left and right leg frames are entirely exposed to the outside of the seat, so the overall width is inevitably much larger than the width of the seat, which makes it difficult to make the chair compact. Also, because the leg frames are too conspicuous, the folding function is too obvious, giving people an impression of being ostentatious, and there is a concern that it may not fit in with the surrounding environment or atmosphere in some places, making it difficult to use.

[0006] The present invention was made against the backdrop of this current situation, and aims to disclose a configuration that is based on a folding chair that can be made compact without changing the seating area from the conventional one and has excellent design, and that further improves protection functions, etc. [Means for solving the problem]

[0007] The present invention includes various configurations, typical examples of which are specified in each claim. The folding chair according to the invention of claim 1 is as follows: "The seat can be raised and rotated with its rear part as a fulcrum. Concatenated leg device With In the folded state with the seat raised and rotated, multiple units can be nested front and back. It is possible , The leg device has left and right leg frame bodies whose upper ends are configured by upper frames that are longitudinal in the front and rear directions, Left and right The entire upper frame is located in the area inside the left and right ends of the seat. It is arranged , The upper left and right frames Front and back long The cover member Layer from above Placed The seat, which has been laid down in a horizontally deployed state, is supported by the left and right upper frames via the cover member. In this basic configuration, " The rear portions of the left and right upper frames are connected by left and right longitudinal beams, and the seat is rotatably connected to the beams. The rear end of the cover member extends to the sides of the beam material, and the rear end of the cover member is formed with inward-facing portions that overlap the left and right ends of the beam material from above. " It has the following characteristics. In this case, the cover members may be arranged one by one on the upper portion of each upper frame, or a plurality of cover members may be arranged in a row in front and behind.

[0008] Claim 2 The folding chair according to the invention has the same basic structure as claim 1, " The front ends of the left and right upper frames are integrally connected with downward-facing front legs, A downward portion that covers the upper end of the front legs from the front is integrally formed at the front end of the cover member. " The structure is as follows. The folding chair according to the invention of claim 3 has the same basic structure as claim 1, "The cover member has a longitudinal outer edge facing outward from the leg device and a longitudinal inner edge facing inward from the leg device, and the longitudinal inner edge extends downward along the inner surface of the upper frame." The structure is as follows.

[0009] Claim Any of 1 to 3 As an example of the invention, claims4 So, " before An elastic contact member that contacts the cover member in the deployed state is provided on the underside of the seat at a location that overlaps the cover member in a plan view. The structure is as follows.

[0010] In this case, the contact member may be provided at multiple locations on the front and rear of the underside of the seat, or at just one location. If provided at just one location, it is preferable to position it so that it contacts the front portion of the cover member (because when the seat is reclined, the moment increases the further forward the seat is). Also, in the present invention, unlike claim 2, it is also possible to provide the contact member on the cover member.

[0012] The invention of claim 5 is 1~3 In any of the "Sway prevention protrusions are provided downward on both the left and right sides of the front portion of the seat, and are adjacent to the cover member from the inside when the seat is deployed." The structure is as follows. [Effects of the Invention]

[0013] Since most of the leg frame is hidden under the seat, the chair can be made compact while ensuring the chair's functionality without reducing the seating area, and the folding function is prevented from being overly emphasized, realizing a very simple and neat design despite the folding type.

[0014] Then, a cover member is provided on the upper frame. It , in use but Cover material Because it is standingThe cover member can be used as a cushioning material. Furthermore, because the cover member is exposed in the folded state, even if another object hits the upper frame in the folded state, the cover member can absorb the impact and prevent deformation of the upper frame. If there is a gap between the underside of the seat and the upper frame, a seated person may insert their fingers into the gap from the outside. However, with the present invention, the gap can be blocked by the cover member, which has the advantage of preventing fingers from being inserted and thus preventing pinched fingers.

[0015] The leg frame is made of metal materials such as steel pipes to ensure strength, but in the present invention, the upper frame is covered over a wide area with a cover material, which also contributes to improving the aesthetic appearance when folded.

[0016] and Because the seat is supported at both ends by the left and right upper frames, no beams are needed to support the seat, simplifying the structure and contributing to improved marketability by maintaining a simple appearance even when folded. Furthermore, because the upper frames are located below the seat and the left-right spacing of the upper frames is smaller than the left-right width of the seat, the seat can be stably supported without the need for special measures such as installing a metal reinforcing frame. Therefore, the necessary strength can be ensured while preventing the structure from becoming too complicated.

[0017] Furthermore, because the seat is supported by the cover member, even if you let go of the seat while it is unfolding, the cover member can absorb the impact. This prevents or significantly reduces the generation of impact noise and damage to the upper frame. In addition, because the cover member is long in the front-to-back direction, it is possible to ensure the necessary shock-absorbing function by placing one cover member on each of the left and right upper frames. Therefore, it is possible to enjoy high shock-absorbing function while minimizing the effort required for installation.

[0018] Claim 4 Like In the seat The provision of an elastic contact member significantly improves the cushioning function when the seat is unfolded. In addition, the contact member can function as a cushioning material when the seat is occupied, contributing to improved seating comfort.

[0019] Claim 1 In this configuration, the seat connection can be positioned further inward than both the left and right ends, which hides the connection and ensures simplicity. Furthermore, because the cover member covers the ends of the beams, the connection points (weld points) between the beams and the upper frame can be hidden by the cover member, contributing to an improved aesthetic appearance. Furthermore, the curved rear portion of the cover member makes it less likely to deform, which also contributes to increasing the strength of the cover member.

[0020] The configuration of claim 5 allows the seat to be held stably even if the user shifts their body left or right while using the chair, eliminating any wobble in the left or right direction and improving quality. In addition, the anti-vibration protrusions are placed against the cover member to prevent slippage, ensuring cushioning against vibration. [Brief explanation of the drawings]

[0021] [Figure 1] 1A and 1B are external views of a chair according to an embodiment, in which (A) is a perspective view in an unfolded state, (B) is a perspective view in a folded state, and (C) is a partial rear perspective view. [Figure 2] (A) is a front view, (B) is a plan view, (C) is a bottom view, and (D) is a partially enlarged view of FIG. 1(B). [Figure 3] FIG. [Figure 4] (A) is a perspective view of the seat and the cushioning material separated, and (B) is a perspective view of the cushioning material turned upside down. [Figure 5] 1A is an exploded perspective view showing the connecting structure of the seat, FIG. 1B is a perspective view of the bearing portion, and FIG. 1C is a perspective view of the rear part of the outer shell. [Figure 6] (A) is a cross-sectional view taken along a VIA-VIA line, and (B) is a perspective view of the seat connection part with the beam material omitted. [Figure 7] 4A is a cross-sectional view taken along line VIIA-VIIA in FIG. 4A, and FIG. 4B is a plan view showing the nesting state. [Figure 8]10A and 10B are diagrams showing another embodiment, in which (A) is a side view in the middle of nesting, and (B) is a bottom view of the chair alone. DETAILED DESCRIPTION OF THE INVENTION

[0022] (1) Overview Next, embodiments of the present invention will be described with reference to the drawings. First, a first embodiment shown in FIGS. of explain.

[0023] As shown in Figure 1, the chair comprises a seat 1, a leg device 2 supporting the seat, and a backrest 3. The leg device 2 comprises left and right leg frame bodies 7, each of which has a horizontal upper frame 6 that is longitudinal from front to back and connected between the upper ends of the front legs 4 and rear legs 5, and a single beam member 8 that is longitudinal from left to right and connects the upper frames 6 of the left and right leg frame bodies 7 only at positions near their rear ends. The seat 1 is connected to the beam member 8 so as to be able to rotate up and down.

[0024] The front legs 4 and the upper frame 6 are integrally formed by bending a single metal pipe (steel or aluminum pipe), and the rear end of the upper frame 6 is welded to the rear legs 5. Back support columns 9 are integrally formed with the rear legs 5 and extend upward, and the upper ends of the left and right back support columns 9 are connected together via connecting rods 9a. The backrest 3 is made of plywood or resin, and is fixed to the back support columns 9 with two screws 10 on each side. In the case of a resin backrest 3, a synthetic resin positioning portion 3a can be provided on the back surface of the backrest, with either the inner periphery or the outer periphery, or both, protruding rearward, as shown by the dashed dotted line in Figure 1(C).

[0025] The left and right front legs 4 and the left and right hind legs 5 are inclined at a slight angle to the vertical so as to form a V shape in a front view. The front legs 4 and the hind legs 5 are also inclined at a slight angle to the vertical so as to form a V shape in a side view (the front legs 4 are inclined backward, and the hind legs 5 are inclined forward). By making the distance between the left and right front legs 4 wider than the distance between the left and right hind legs 5, multiple chairs can be nested front to back when the seat 1 is upright and rotated. Therefore, the left and right upper frames 6 form a V shape with a widened front in a plan view.

[0026] A horizontally swivelable caster 11 is attached to the lower end of each of the legs 4, 5. Therefore, the lower end of each of the legs 4, 5 is in a vertical position. Note that the present invention can be applied to chairs that do not have casters 11.

[0027] The chair of this embodiment is equipped with a memo pad 12 as an optional accessory. As shown in Figure 1(B), memo pad 12 is attached to a frame member 13 that is fixed by welding to the right upper frame 6. Frame member 13 is bent in a crank shape, with a horizontal section 13a at its upper end. A bearing cap 14 that holds horizontal section 13a from below is fixed with a screw near one corner of memo pad 12, making memo pad 12 rotatable. Furthermore, a U-shaped position-maintaining member 15 that surrounds bearing cap 14 from below is fixed to horizontal section 13a of frame member 13 by welding.

[0028] Therefore, the memo stand 12 is maintained in a horizontal position by its underside abutting against the position maintaining member 15. The vertically raised position is maintained by a part of the memo stand 12 abutting against the upright portion of the frame member 13. Furthermore, the horizontal portion 13a of the frame member 13 is inclined so that it shifts inward to the left and right as it goes forward in a plan view. For this reason, as shown in Figure 7(B), the chair equipped with the memo stand 12 can be nested.

[0029] 2(C), when the memo pad 12 is reclined to a horizontal position, it is tilted in a plan view (and bottom view) so that the distance from the backrest 3 increases as it moves away from the pivot point. When the seat 1 and memo pad 12 are reclined and in the unfolded state, the user of the chair sits down or leaves the seat by moving their body sideways from the side where the memo pad 12 is not installed (the left side). In this embodiment, however, the space between the memo pad 12 and the backrest 3 widens toward the side where people enter and exit, preventing the memo pad 12 from getting in the way when the user moves their body sideways, allowing them to sit down or leave the seat smoothly.

[0030] Furthermore, since the memo pad 12 is located to the right of the seated person, the user will use a laptop computer or the like with their body twisted slightly to the side. However, if the memo pad 12 is tilted so that its left end is away from the backrest 3, as in the embodiment, the user's body will be directly facing the memo pad 12, allowing the user to use the laptop computer or the like in a natural position, which has the advantage of making it easier to use the laptop computer or the like.

[0031] As shown in Figures 2(C) and (D), most of the left and right upper frames 6 are positioned below the seat 1, and the seat 1 is supported by the left and right upper frames 6. To soften the impact of the seat 1, a cover member (buffer material, bumper member) 16 that is long from front to back and has an arc-shaped cross section is fixed to the top surface of the upper frame 6 with screws 17 on the front and back.

[0032] As shown in FIG. 7(A), the cover member 16 covers the upper surface of the upper frame 6. Meanwhile, It is embedded in the inside of the upper frame 6. (It goes around) The lower end of the cover member 16 is at about the same height as the axis of the upper frame 6. Therefore, the longitudinal inner edge of the cover member 16 is located lower than the longitudinal outer edge. The cover member 16 is made of a synthetic resin such as polypropylene.

[0033] Front end of cover member 16 teeth , the top of the front leg 4 From the frontThe rear end of the cover member 16 has a downward portion 16a that faces inward so as to cover the end of the beam material 8, and the rear end 16b of the cover member 16 has an inward portion 16b that faces inward so as to cover the end of the beam material 8. Also, as shown in FIG. 4(B), the cover member 16 has a pair of ribs 18 on the left and right that come into contact with the upper frame 6, and multiple pairs of ribs 18 on the front and back.

[0034] (2) Seat and its mounting structure As shown in Figure 3, the seat 1 comprises an outer shell 20 made of synthetic resin that is open at the top and bottom, an inner shell 21 made of synthetic resin attached to the top surface of the outer shell 20, and a cushion material 22 that is placed on top of the inner shell 21, and the cushion material 22 is covered with a skin material. The inner shell 21 has a large number of slits 23 formed in the longitudinal direction and at an angle to allow it to bend downward (expand) due to the load caused by sitting on it.

[0035] Although not shown in detail, the inner shell 21 is attached to the outer shell 20 by fitting engagement claws provided on the front, rear, left, and right sides into engagement holes in the outer shell 20. A large rectangular opening 24 is formed in the outer shell 20, so that a person can see the underside of the inner shell 21 through the opening 24 when the inner shell 21 is folded. Therefore, a person can see the slits 23 of the inner shell 21 through the opening 24 when the inner shell 21 is folded.

[0036] As shown in FIG. 3, the outer shell 20 is shaped like a shallow tray having a wall portion that forms the outer periphery and a wall portion that forms the inner periphery, and is formed with several reinforcing ribs 25 that extend long in the left-right and front-rear directions inside the outer shell 20.

[0037] As shown in Figures 4 and 7(A), contact members 26 that rest on the cover member 16 are attached to the left and right sides of the rear legs 5. The contact members 26 are made of a soft material such as rubber or elastomer, and as shown in Figure 7(A), are attached by being pressed into mounting holes 27 provided in the outer shell 20. In addition, an anti-vibration protrusion 28 protrudes downward from the inside of the contact member 26 located at the front of the outer shell 20, close to the cover member 16. The contact members 26 are provided in two locations, front and rear, but it is also possible to provide them only at the front, or in three or more locations, front and rear.

[0038] The inner shell 21 and the cushion material 22 are shaped to bulge downward (concave downward) so as to encase the buttocks of the seated person from below, and therefore the lower surface of the outer shell 20 also has a shape that bulges downward when viewed from the front. As can be seen from Figure 4, the beam material 8 is bent so as to bulge downward following the shape of the lower surface of the outer shell 20.

[0039] A U-shaped support bracket 29 having a horizontal support shaft 29a and left and right arm portions 29b tilted backward in side view is fixed to the beam material 8 by welding, and the outer shell 20 of the seat 1 is connected to the support shaft 29a of the support bracket 29. The support bracket 29 is made of a round bar material with a smaller diameter than the beam material 8 and the leg frame body 7, and the seat 1 rotates up and down around the support shaft 29a of the support bracket 29 as a fulcrum. The arm portions 29b of the support bracket 29 are tilted backward in side view so that the support shaft 29a is located behind the beam material 8.

[0040] As can be seen from Figures 2(C) and 4(A), the seat 1 and the portion near its rear end are connected to the support shaft 29a, but since the support shaft 29a is located higher and further back than the beam material 8, the seat 1 can be raised and rotated without its rear edge hitting the outer shell 20.

[0041] (3) Details of the connecting structure 4 and 5, the base 1 is connected to the support shaft 29a via an upper bearing cap 31 made of a metal plate and a lower bearing cap 32 made of synthetic resin. The lower bearing cap 32 has a width that allows it to fit between the left and right arm portions 29b of the support bracket 29 with a small gap, while the upper bearing cap 31 has a width that is significantly smaller than that of the lower bearing cap 32, and the upper and lower bearing caps 31 and 32 sandwich the support shaft 29a in half from above and below.

[0042] The upper bearing cap 31 has flanges 31a and 31b at the front and rear of the portion surrounding the support shaft 29a, and these flanges 31a and 31b overlap with the lower bearing cap 32. The lower bearing cap 32 bulges downward and has numerous ribs 33 formed inside. A rectangular positioning hole 34a is formed in the rear flange 31b of the upper bearing cap 31, and the lower bearing cap 32 has a positioning protrusion 34b that fits into the positioning hole 34a from below. The positioning protrusion 34b is formed by a group of ribs.

[0043] As shown in Figures 4 and 5, a recess 36 into which the lower bearing cap 32 fits is formed in the outer shell 20, and the recess 36 has an escape hole 37 to prevent interference between the bearing portion of the upper bearing cap 31 and the positioning protrusion 34b of the lower bearing cap 32, and the lower bearing cap 32 overlaps the step surrounding the escape hole 37 with the upper bearing cap 31 interposed therebetween.

[0044] As shown in Figure 5(A), three cylindrical portions 34c are formed side by side in the front portion of the lower bearing cap 32, and upward screws 38 are inserted into the cylindrical portions 34c from below and pass through the front flange 31a of the upper bearing cap 31. As can be seen from Figure 5(A), the upward screws 38 are screwed into a pair of left and right female screw holes 38a provided in the outer shell 20. In the upper bearing cap 31, the insertion holes through which the upward screws 38 pass are designated by the symbol 38b.

[0045] There are three upward screws 38 lined up on the left and right, and the two upward screws 38 at the left and right ends are used to fasten the upper and lower bearing caps 31, 32 together with the outer shell 20, while the middle screw 38 is used to temporarily hold the upper and lower bearing caps 31, 32 to the support bracket 29. Therefore, the front flange 31a of the upper bearing cap 31 is formed with a tapped hole 38c (see, for example, Figure 6(A)) into which the middle upward screw 38 is screwed.

[0046] The rear part of the lower bearing cap 32 is fastened together to the outer shell 20 and the upper bearing cap 31 by two downward screws 39 on the left and right as shown in Fig. 5(C). For this reason, as shown in Figs. 5(A) and 5(B), screw insertion holes 40 are formed in the rear end part of the outer shell 20 and the rear flange 31b of the upper bearing cap 31. In addition, as shown in the right end part of Fig. 5(A), the lower bearing cap 32 has a pair of left and right female threaded holes 41 into which the downward screws 39 are screwed.

[0047] As shown in Figure 6(A), a C-shaped sleeve 42 is fitted onto the support shaft 29a of the support bracket 29 and fixed with a screw 43. The sleeve 42 is intended to allow the seat 1 to rotate smoothly, and is made of a synthetic resin with a low coefficient of friction, such as POM resin. The sleeve 42 has a length shorter than the left-right length of the support shaft 29a, and therefore the lower bearing cap 32 is formed with a first recess 46 into which the sleeve 42 fits so that it cannot shift left or right.

[0048] The first recesses 46 are formed in the group of ribs 33, and second recesses 45 that surround the support shaft 29a from below are formed on the left and right outside of the first recesses 46 by similarly cutting out the upper ends of the ribs 33 in an arc shape. In this embodiment, the lower bearing cap 32 is held against the support bracket 29 so that it cannot shift left or right, and therefore the rear part of the seat 1 is held so that it cannot shift left or right.

[0049] In this embodiment, as shown in Figure 6(B) (see also Figure 5(A)), stopper portions 49 are formed on the left and right sides of the recess 36 in the outer shell 20, against which the arm portion 29b of the support bracket 29 abuts when the seat 1 is raised, thereby determining the raised and rotated position of the seat 1.

[0050] As shown in Figure 6(A) (see also Figure 3), a longitudinal relief slot 50 into which the upper end of the upper bearing cap 31 fits is formed at the rear end of the inner shell 21. In other words, by fitting the upper end of the upper bearing cap 31 into the inner shell 21, the support shaft 29a is positioned as high as possible.

[0051] (4) Summary The four-legged form of chair with a fixed seat is the most popular form and is used in a variety of places, but the chair of this embodiment has the appearance of this popular chair when the seat 1 is reclined and rotated in the unfolded state, and does not look like a foldable chair (the folding components are not exposed). Therefore, although it is a folding chair, it does not have the "foldable chair feel" and has a simple and neat appearance.

[0052] If the foldable function is obvious from the exterior, it may be too functional and difficult to use depending on the environment or atmosphere, but in this embodiment, the foldable function is not visible at all when in use, so it can be used in a variety of places without feeling out of place, thereby improving the product value.

[0053] In addition, in the unfolded state, the seat 1 is supported at both ends by the left and right upper frames 6, but because the distance between the left and right upper frames 6 is narrower than the distance between the left and right sides of the seat 1, no special components such as metal support frames are required, and even with an outer shell 20 made of synthetic resin, the necessary support strength can be ensured by simply providing reinforcing ribs 25. This is therefore advantageous in terms of cost as well.

[0054] Furthermore, because the cover member 16 is attached to the upper frame 6, even if you let go of the seat 1 while tilting or rotating it, the impact can be absorbed by the cover member 16, so there is no problem of dents being made in the upper frame 6 and impact noise can also be prevented. In particular, the provision of a contact member 26 made of a soft material can significantly improve the cushioning function.

[0055] In addition, since the cover member 16 of this embodiment extends long in the front-rear direction, the outer shell 20 and It also has the function of sealing the gap between it and the upper frame 6, so even if a person places their fingertip upward on the upper frame from the outside, the finger will not get pinched. Even if an object is accidentally dropped on the upper frame 6 in the folded state, the cover member 16 cushions the impact, preventing damage to the upper frame 6. In addition, the cover member 16 also has a cosmetic function, which contributes to improving the appearance in the folded state.

[0056] Furthermore, since the outer shell 20 is provided with anti-vibration protrusions 28, even if the user shifts their body while seated, the seat 1 can be prevented from swaying from side to side, but the impact is absorbed when the anti-vibration protrusions 28 hit the cover member 16, so there is no generation of abnormal noise or dents on the upper frame 6.

[0057] (5) Other embodiments In the first embodiment, the upper frame 6 was in a horizontal position with a constant height, but in the second embodiment shown in Figures 8(A) and (B), the portion of the upper frame 6 in front of the beam material 8 is inclined slightly downward toward the front. This allows the left and right upper frames 6 to be nested while maintaining a parallel position. Because the upper frame 6 is inclined, a downward rib 51 is provided in the front portion of the seat 1 that rests on the inclined portion of the upper frame 6 to maintain the seat 1 in a predetermined position.

[0058] For nesting to occur, the left-right spacing between the front legs 4 and the rear legs 5 must be different, but in this embodiment, unlike the first embodiment, the left-right spacing between the front legs 4 is set to a dimension smaller than the left-right spacing between the rear legs 5. Nesting is also possible by forming the upper frame 6 in a stepped shape in side view by stepping down the portion of the upper frame 6 in front of the beams 8. Alternatively, the entire upper frame 6 may be tilted downward at the front.

[0059] The present invention can be embodied in various forms other than those described above. For example, the cover member can be extended to the rear of the beam material to cover the entire length of the upper frame. An elastic layer such as an elastomer can be provided on the upper surface of the cover member. The front and rear legs and the upper frame can also be made of synthetic resin. The outer shell may not be open at the top or bottom. The seat (outer shell) can also be supported by the upper frame at three or more points. [Industrial Applicability]

[0060] The present invention can be embodied in a folding chair, and therefore has industrial applicability. [Explanation of symbols]

[0061] 1 seat 2 leg device 4 front legs 5 Hind legs 6 Upper frame 7 Leg frame body 8 Beam material 16 Cover member 16a Downward part 16b Inward-facing part 20 outer shell 21 Inner shell 26 Contact parts 28 Anti-vibration protrusion

Claims

1. The seat has a leg device connected so that it can be raised and rotated around its rear as a fulcrum, and multiple units can be nested front and back in the folded state with the seat raised and rotated, The leg device has left and right leg frame bodies whose upper ends are configured by upper frames that are longitudinal in the front and rear directions, and the left and right upper frames are entirely disposed in an area inside the left and right ends of the seat, A chair in which a front-to-rear longitudinal cover member is placed on top of the left and right upper frames, and the seat, when laid down in a horizontally deployed state, is supported by the left and right upper frames via the cover member, The rear portions of the left and right upper frames are connected by left and right longitudinal beams, and the seat is rotatably connected to the beams. The rear end of the cover member extends to the side of the beam material, and the rear end of the cover member has an inward-facing portion that overlaps the left and right ends of the beam material from above. Folding chair.

2. The seat has a leg device connected so that it can be raised and rotated around its rear as a fulcrum, and multiple units can be nested front to back in a folded state with the seat raised and rotated, The leg device has left and right leg frame bodies whose upper ends are configured by upper frames that are longitudinal in the front and rear directions, and the left and right upper frames are entirely disposed in an area inside the left and right ends of the seat, A chair in which a front-to-rear longitudinal cover member is placed on top of the left and right upper frames, and the seat, when laid down in a horizontally deployed state, is supported by the left and right upper frames via the cover member, The front ends of the left and right upper frames are integrally connected with downward-facing front legs, A downward portion that covers the upper end of the front leg from the front side is integrally formed at the front end of the cover member. Folding chair.

3. The seat has a leg device connected so that it can be raised and rotated with its rear part as a fulcrum, and multiple units can be nested front to back in a folded state with the seat raised and rotated, The leg device has left and right leg frame bodies whose upper ends are configured by upper frames that are longitudinal in the front and rear directions, and the left and right upper frames are entirely disposed in an area inside the left and right ends of the seat, A chair in which a front-to-rear longitudinal cover member is placed on top of the left and right upper frames, and the seat, when laid down in a horizontally deployed state, is supported by the left and right upper frames via the cover member, The cover member has a longitudinal outer edge facing outward from the leg device and a longitudinal inner edge facing inward from the leg device, and the longitudinal inner edge extends downward along the inner surface of the upper frame. Folding chair.

4. A contact member made of an elastic material that contacts the cover member in an unfolded state is provided at a portion of the underside of the seat that overlaps with the cover member in a plan view. A folding chair according to any one of claims 1 to 3.

5. Anti-vibration protrusions are provided downward on both left and right sides of the front portion of the seat, and are close to the cover member from the inside when the seat is deployed. A folding chair according to any one of claims 1 to 3.

Images