chair

Abstract

To provide a chair having a part that also functions as a handle when carrying the chair. [Solution] The chair comprises a backrest and a backrest frame. The backrest is configured to support the back of a user of the chair. The backrest frame supports the backrest. The backrest frame has a right rod-shaped member, a left rod-shaped member, and an upper rod-shaped member. The right rod-shaped member supports the right side of the backrest. The left rod-shaped member supports the left side of the backrest. The upper rod-shaped member supports the upper side of the backrest. The upper rod-shaped member also protrudes convexly toward the rear side, connecting the right rod-shaped member and the left rod-shaped member.

Description

[Technical Field]

[0001] The present disclosure relates to a chair. [Background technology]

[0002] Patent Document 1 discloses a chair back composed of an upholstery, a backrest frame, and a backing. In this backrest, the backing is fixed to the rear side of the backrest frame using screws, and the upholstery is fixed to the front side of the backrest frame by hooking a hook piece provided on the upholstery to a bridge bar provided on the backrest frame and also engaging with the backing using a rivet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-220136 Summary of the Invention [Problem to be solved by the invention]

[0004] Portable chairs used in multipurpose halls and the like are required to be easy to carry. One aspect of the present disclosure is to provide a chair that includes a portion that also functions as a handle for carrying the chair. [Means for solving the problem]

[0005] One aspect of the present disclosure is a chair comprising a backrest and a backrest frame. The backrest is configured to support the back of a user of the chair. The backrest frame supports the backrest. The backrest frame has a right rod member, a left rod member, and an upper rod member. The right rod member supports the right side of the backrest. The left rod member supports the left side of the backrest. The upper rod member supports the upper side of the backrest. The upper rod member protrudes convexly rearward and connects the right rod member and the left rod member.

[0006] With this configuration, it is possible to provide a chair that has a portion that also functions as a handle when carrying the chair.

[0007] In one aspect of the present disclosure, the backrest may have a main body portion and a bending portion. The main body portion is plate-shaped and contacts the back of a user. The bending portion is bent from an upper end of the main body portion and extends rearward.

[0008] In one aspect of the present disclosure, the backrest may be supported by the backrest frame so that the rear end of the bent portion abuts against the upper rod-shaped member.

[0009] In one aspect of the present disclosure, the backrest may be supported by the backrest frame so that there is a gap between the rear end of the bent portion and the upper rod-shaped member. [Brief explanation of the drawings]

[0010] [Figure 1] This is a perspective view of the chair seen from the front side. [Figure 2] This is a perspective view of the chair as seen from the rear side. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 2 is an exploded perspective view of a backrest used in a chair. [Figure 8] 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 3 and an enlarged cross-sectional view of the periphery of a mounting portion. [Figure 9] 3A and 3B are a cross-sectional view and an enlarged cross-sectional view of the first plate portion and the periphery of a bending portion of the first plate, respectively, showing a state in which a cushioning material is attached to the first plate portion. [Figure 10] 10A and 10B are a cross-sectional view showing a modified example of a backrest in which a groove is integral with a first plate portion, and an enlarged cross-sectional view of the periphery of a bending portion of the first plate. [Figure 11] FIG. 10 is a top view showing a configuration in which there is a gap between the first bent portion and the upper pipe. [Figure 12] 12 is a cross-sectional view taken along the line XII-XII of FIG. 11. [Figure 13] FIG. 10 is an enlarged cross-sectional view of the periphery of a first plate bending portion to which a mounting portion having a different shape is attached. [Figure 14] 10 is an enlarged cross-sectional view of the periphery of a first plate bending portion of a backrest having a second plate portion having a second plate bending portion. FIG. [Figure 15] 10 is a diagram showing a configuration in which the first plate portion has a fitting hole recessed upward on the lower surface of the first bent portion, and the second plate portion has a protrusion on the upper end portion. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. Configuration] [1-1. Chair] 1 to 6 includes a support body 10, a seat body 20, and a backrest 30. In the following description, up-down, front-back, and left-right directions are expressed based on a user normally seated on chair 1.

[0012] The support body 10 is formed by bending and welding a tubular metal pipe, and supports a seat body 20 and a backrest 30. The support body 10 has a right leg body 11, a left leg body 12, a front connecting portion 13, a rear connecting portion 14, and a backrest frame 15.

[0013] The right leg 11 and the left leg 12 are annular members having a substantially rectangular annular shape when viewed from the left and right. The right leg 11 and the left leg 12 may have leg ends 40 provided on the front and rear sides of lower pipes that are arranged along the floor surface on which the chair 1 is placed.

[0014] The front connector 13 is a member that extends straight and connects the front pipes of the right leg 11 and the left leg 12. The rear connecting portion 14 is a member that curves so as to be convex toward the rear side and connects the rear pipes of the right leg 11 and the left leg 12.

[0015] The backrest frame 15 is connected to the connecting portions of the right leg 11 and the left leg 12 with the rear connecting portions 14, and is a member that is bent in a generally U-shape with an open lower side when viewed from the front-to-rear direction. The backrest frame 15 has left and right pipes 151, 152 and an upper pipe 153. The upper pipe 153 of the backrest frame 15 is curved so as to convex toward the rear side, and connects the left and right pipes 151, 152 of the backrest frame 15 that extend upward from the connecting portions of the right leg 11 and the left leg 12 with the rear connecting portions 14. The backrest frame 15 has a generally L-shape with its upper end bent backward when viewed from the left-to-right direction.

[0016] The backrest frame 15 has a hooking portion 41 and a fixing portion 42 shown in Fig. 7. The hooking portion 41 and the fixing portion 42 are provided on each of the left and right pipes 151, 152 of the backrest frame 15. Specifically, the hooking portion 41 and the fixing portion 42 are fixed to the left and right pipes 151, 152 of the backrest frame 15 by welding or the like so as to be located inside the left and right pipes 151, 152 of the backrest frame 15. The fixing portion 42 is located below the hooking portion 41.

[0017] Returning to Figures 1 to 6, the seat body 20 is configured so that a user can sit on it. The seat body 20 is generally rectangular in top view, with the rear end curved so that it is convex toward the rear. When viewed from the left and right, the seat body 20 has a generally L-shape with the front end bending downward. The seat body 20 is supported by the right leg 11, the left leg 12, the front connector 13, and the rear connector 14. Specifically, both left and right ends of the seat body 20 are connected to pipes above the right leg 11 and the left leg 12, the front end of the seat body 20 is connected to the front connector 13, and the rear end of the seat body 20 is connected to the rear connector 14.

[0018] The backrest 30 is generally rectangular in front view and is configured to support the back of a seated user. In plan view, the backrest 30 is gently curved, with both left and right ends positioned more forward and the center positioned more rearward. In other words, the backrest 30 has a curved shape that is convex toward the rear. When viewed from the left and right, the backrest 30 has a generally L-shape with the upper end bent rearward. The backrest 30 is supported by the backrest frame 15.

[0019] [1-2. Backrest] Next, the detailed structure of the backrest 30 will be described with reference to FIG. The backrest 30 has a first plate portion 31, a second plate portion 32, and an attachment portion 33.

[0020] The first plate portion 31 is a front plate attached to the front side of the backrest frame 15. The first plate portion 31 is positioned so as to abut against the back of the user of the chair 1. The first plate portion 31 is substantially rectangular in front view. In plan view, the first plate portion 31 is gently curved so that both the left and right ends are positioned further forward and the center is positioned further rearward. In other words, the first plate portion 31 has a curved shape that is convex toward the rear.

[0021] The first plate portion 31 has a main body portion 311 , a first plate bending portion 312 , and an extension portion 313 . The main body 311 is a plate-like portion that is generally rectangular in front view and curved so as to be convex toward the rear side. The main body 311 has a hook hole 43 and a through hole 44.

[0022] In this embodiment, two of each of the hook holes 43 and the through holes 44 are provided in the main body 311, spaced apart in the left-right direction. The through holes 44 are located below the hook holes 43. The hook holes 43 are holes that can hook the above-mentioned hook portions 41. The through holes 44 are holes for inserting fasteners such as screws or rivets.

[0023] The first bent plate portion 312 is a portion that bends and extends rearward from the upper end of the main body portion 311. The first bent plate portion 312 has a generally crescent shape when viewed from above. The extension portion 313 is a portion that bends from the lower end of the main body portion 311 and extends rearward.

[0024] The second plate portion 32 is a rear plate attached to the rear side of the backrest frame 15. The second plate portion 32 is disposed opposite the surface of the first plate portion 31 opposite the side that contacts the back of the user of the chair 1, i.e., facing the rear surface of the first plate portion 31. The second plate portion 32 is substantially rectangular in front view. In plan view, the second plate portion 32 is gently curved so that both the left and right ends are positioned forward and the center is positioned rearward. In other words, the second plate portion 32 has a curved shape that is convex toward the rear side.

[0025] The mounting portion 33 has a generally crescent shape when viewed from above. The mounting portion 33 is a separate component that can be attached to the first plate portion 31, and is attached to the lower surface of the first plate bending portion 312 of the first plate portion 31.

[0026] As shown in FIGS. 7 and 8, the attachment portion 33 has a protrusion 331 and a hole 332. The protruding portion 331 is a portion that protrudes from the lower surface of the mounting portion 33 at a predetermined distance from the front end surface 333 of the mounting portion 33 that abuts against the first plate portion 31 when the mounting portion 33 is attached to the lower surface of the first plate bending portion 312. The front end surface 333 of the mounting portion 33 is a surface that curves in a concave direction in a crescent shape. By providing the protruding portion 331 on the mounting portion 33, a step portion 334 that has a length in the left-right direction is formed at the front end of the mounting portion 33. The step portion 334 is a portion that connects the lower surface of the mounting portion 33 and the lower surface of the protruding portion 331. In other words, the step portion 334 is the front end surface of the protruding portion 331. When the mounting portion 33 is attached to the lower surface of the first plate bending portion 312 so that the front end face 333 of the mounting portion 33 abuts the first plate portion 31, the step portion 334 forms a groove 335 between the first plate portion 31 and the protrusion portion 331 that is recessed upward and has a length in the left-right direction.

[0027] Hole 332 is recessed upward in protrusion 331 and has a length in the left-right direction. Hole 332 functions, for example, as a handle hole that can be used to hook a hand when carrying chair 1. That is, in this embodiment, attachment portion 33 is a member that functions to facilitate a handle that can be used to hook a hand when carrying chair 1.

[0028] In this embodiment, the first plate 31 is fixed to the front side of the backrest frame 15 by fastening the hooking portions 41 of the backrest frame 15 to the hooking holes 43 and then fastening the first plate 31 to the fixing portions 42 of the backrest frame 15 by inserting screws or rivets into the through-holes 44, for example. The second plate 32 is fixed to the rear side of the backrest frame 15 by fitting the upper end 321 of the second plate 32 into a groove 335 formed by attaching the mounting portion 33 to the first plate 31 and then abutting the lower end 322 of the second plate 32 against the extension portion 313 of the first plate 31. At this time, the second plate 32 is arranged so that the left and right ends abut against the insides of the left and right pipes 151, 152 of the backrest frame 15.

[0029] Although the above-described configuration has been exemplified in which no cushioning material is attached to the first plate portion 31, cushioning material may be attached to the front side of the first plate portion 31. For example, as shown in FIG. 9, the first plate portion 31 may have a urethane cushion 34 attached to the front side, and then be wrapped with fabric 35 or the like. The fabric 35 is wrapped around the end of the first plate bending portion 312 and the end of the extension portion 313 so as to cover them, and is fixed to the lower surface of the first plate bending portion 312 and the upper surface of the extension portion 313 with, for example, a tacker needle. Also, for example, a cushion pad may be attached only to the front side of the first plate portion 31. As shown in Figure 9, when the first plate portion 31 is covered with a urethane cushion 34 and fabric 35, if the mounting portion 33 is a separate part from the first plate portion 31, it is convenient because the end of the fabric 35 pulled into the lower surface side of the first plate bending portion 312 and the tacker needles used to secure the fabric 35 can be covered and hidden by the mounting portion 33.

[0030] [2.Effects] According to the embodiment described above in detail, the following effects can be obtained. (2a) In this embodiment, the upper end 321 of the second plate portion 32 is fitted into the groove 335, thereby restricting movement of the second plate portion 32 at least in the front-rear and upward directions. This makes it easy to determine the fixing position of the second plate portion 32.

[0031] In this embodiment, the first plate 31 is disposed so that the left and right ends of the second plate 32 abut against the inside of the left and right pipes 151, 152 of the backrest frame 15. This restricts the left and right movement of the second plate 32 by the left and right pipes 151, 152 of the backrest frame 15. This makes it easy to determine the fixed position of the second plate 32 in the left and right direction.

[0032] Furthermore, in this embodiment, with the upper end 321 of the second plate portion 32 fitted into the groove 335, the lower end 322 of the second plate portion 32 abuts against the extension portion 313 of the first plate portion 31. This restricts downward movement of the second plate portion 32. This makes it easy to determine the fixing position of the second plate portion 32 in the up-down direction. Therefore, the second plate portion 32 that constitutes the backrest 30 can be easily fixed to the chair 1, and is also easy to remove.

[0033] (2b) In this embodiment, since the groove 335 has a length in the left-right direction, the second plate portion 32 fitted into the groove 335 is particularly unlikely to shift in the front-to-rear direction. Therefore, by simply fitting the upper end portion 321 of the second plate portion 32 into the groove 335, movement of the second plate portion 32 at least in the front-to-rear direction and upward direction can be stably restricted.

[0034] (2c) In this embodiment, the groove 335 is formed by attaching the mounting portion 33, which is a separate part from the first plate portion 31, to the first plate portion 31. For this reason, the degree of freedom in the shape of the first plate portion 31 can be increased compared to a configuration in which the groove 335 is formed directly on the first plate portion 31 and the first plate portion 31 and the groove 335 are integrated.

[0035] (2d) In this embodiment, the attachment portion 33 is made of a material that functions to facilitate a handle that can be hooked onto when carrying the chair 1, so that the groove 335 can be easily formed while adding another function to the chair.

[0036] In this embodiment, the groove 335 corresponds to an example of an upward regulating portion, the left and right pipes 151, 152 of the backrest frame 15 correspond to an example of a lateral regulating portion, and the lower end portion 322 of the second plate portion 32 corresponds to an example of an abutment portion.

[0037] 3. Other Embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take on various forms.

[0038] (3a) In the above embodiment, a configuration in which the groove 335 is formed by a step portion 334 formed in the mounting portion 33, which is a separate part from the first plate portion 31, is exemplified, but the method of forming the groove is not limited to this.

[0039] For example, as in the backrest 30a shown in FIG. 10, a groove 335a may be integrally formed in the first plate portion 31a. That is, the groove 335a may be directly formed in the first plate bend portion 312a of the first plate portion 31a. A hole 332a, recessed upward and having a length in the left-right direction, that functions as a handhold hole may also be directly formed in the first plate bend portion 312a of the first plate portion 31a. Note that in a configuration in which the groove 335b is formed in the first plate bend portion 312b of the first plate portion 31b, as in the backrest 30b shown in FIGS. 11 and 12, the first plate portion 31b may be supported by the backrest frame 15 so as to have a gap 336 between the first plate bend portion 312b and the upper pipe 153. In such a configuration, the gap 336 functions as a handhold hole.

[0040] 13, the backrest 30c may have an attachment portion 33c having a predetermined thickness in the up-down direction. The attachment portion 33c is recessed upward near the center and has a hole 332c extending in the left-right direction. The attachment portion 33c may be attached to the lower surface of the first plate bending portion 312 of the first plate portion 31 at a distance from the main body portion 311 so that the front end surface 333c of the attachment portion 33c does not come into contact with the first plate portion 31, thereby forming a groove 335c. The upper end portion 321 of the second plate portion 32 is fitted into the groove 335c formed between the attachment portion 33c and the main body portion 311. In this example, fitting the upper end portion 321 of the second plate portion 32 into the groove 335c restricts movement of the second plate portion 32 in the front-rear and upward directions. In other words, the second plate portion 32 is restricted from moving forward by the main body portion 311, from moving upward by the first plate bending portion 312, and from moving backward by the attachment portion 33c.

[0041] 14, the second plate portion 32d may have a second plate bending portion 323, which is a portion that bends and extends rearward, at its upper end. The second plate bending portion 323 is attached to the lower surface of the first plate bending portion 312 so as to be disposed opposite the first plate bending portion 312, and a rear end 324 of the second plate bending portion 323 abuts against the upper pipe 153. That is, in this example, the first plate bending portion 312 is supported by the upper pipe 153 so that a portion of the upper pipe 153 protrudes downward beyond the lower surface of the first plate bending portion 312, thereby forming a groove 335d into which the second plate bending portion 323 can be fitted. In this way, fitting the second plate bending portion 323 into the groove 335d restricts movement of the second plate portion 32d in the front-rear and upward directions. In other words, the forward movement of the second plate portion 32d is restricted by the main body portion 311, the upward movement of the second plate portion 32d is restricted by the first plate bending portion 312, and the rearward movement of the second plate portion 32d is restricted by the upper pipe 153. Note that, in this example, a configuration has been illustrated in which the second plate bending portion 323 at the upper end of the second plate portion 32 extends in the front-to-rear direction, but a configuration in which the second plate portion does not have a second plate bending portion may be configured in which the upper end of the second plate portion is fitted into a groove formed between the first plate portion 31 and an upper pipe that supports the first plate portion 31. Even in such a configuration, the rearward movement of the upper end of the second plate portion is restricted by abutting against the upper pipe, and the forward and upward movement of the upper end of the second plate portion is restricted by abutting against the first plate portion 31.

[0042] (3b) The shape into which the upper end 321 of the first plate portion 31 is fitted is not limited to the groove 335. For example, the length of the groove in the left-right direction may be shorter than that of the groove 335, and multiple grooves may be provided at intervals from each other. Specifically, as shown in FIG. 15 , two protrusions 325 may be formed on the upper end 321e of the second plate portion 32e, and two fitting grooves 337 into which the two protrusions 325 can be fitted may be formed on the first plate bending portion 312e of the first plate portion 31e. Note that the number of protrusions and fitting grooves is not limited to two, and may be one, three, or more. Furthermore, the shape into which the upper end 321 of the first plate portion 31 is fitted may be a shape other than a groove. For example, a space into which the upper end 321 is fitted may be formed by providing multiple protrusions lined up in the left-right direction on the first plate bending portion. Furthermore, for example, multiple claws may be provided on the first plate bending portion so that the upper end 321 can be clamped.

[0043] (3c) In the above embodiment, the second plate portion 32 is arranged so that its left and right ends abut against the inside of the left and right pipes 151, 152 of the backrest frame 15. However, the configuration for restricting left and right movement of the second plate portion 32 is not limited to this. For example, the first plate portion 31 or the backrest frame 15 may be provided with a lateral restriction portion that can restrict left and right movement of the second plate portion 32. Furthermore, the backrest does not have to have a configuration for restricting left and right movement of the second plate portion 32, for example.

[0044] (3d) In the above embodiment, the configuration in which the lower end 322 of the second plate portion 32 abuts against the extension portion 313 of the first plate portion 31 is exemplified, but the configuration for restricting downward movement of the second plate portion 32 is not limited to this. For example, the second plate portion may have an abutment portion that protrudes forward and abuts against the extension portion 313. Furthermore, the backrest may not have a configuration for restricting downward movement, for example.

[0045] (3e) The first plate portion 31 and the second plate portion 32 may further have a fixing mechanism. For example, the first plate portion 31 and the second plate portion 32 may be capable of being fixed using rivets, screws, adhesive, hook-and-loop fasteners, or the like.

[0046] (3f) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. All aspects included in the technical idea identified by the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0047] 1...chair, 10...support, 11...right leg body, 12...left leg body, 13...front connecting portion, 14...rear connecting portion, 15...backrest frame, 20...seat body, 30, 30a to 30d...backrest, 31, 31a, 31b, 31e...first plate portion, 32, 32d, 32e...second plate portion, 33, 33c...mounting portion, 34...urethane cushion, 35...fabric, 40...leg end, 41...hooking portion, 42...fixing portion, 43...hooking hole, 44...through hole, 151, 152 ...left and right pipes, 153...upper pipe, 311...main body, 312, 312a, 312b, 312e...first plate bending portion, 313...extension portion, 321, 321e...upper end portion, 322...lower end portion, 323...second plate bending portion, 324...rear end portion, 325...protrusion, 331...protruding portion, 332, 332a, 332c...hole, 333, 333c...front end surface, 334...step portion, 335, 335a to 335d...groove, 336...gap, 337...fitting groove.

Claims

1. A chair, a backrest configured to support the back of a user of the chair; a backrest frame supporting the backrest; Equipped with the backrest has a plate-shaped main body portion that contacts the back of the user, and a bent portion that bends from an upper end of the main body portion and extends rearward, the backrest frame includes a right rod-shaped member supporting the right side of the backrest, a left rod-shaped member supporting the left side of the backrest, and an upper rod-shaped member supporting the upper side of the backrest, the backrest is supported by the backrest frame such that a rearward-facing surface at a rear end of the bent portion and the upper rod-shaped member abut against each other across the entire width of the backrest; the bent portion is formed in a plate shape with an upper surface and a lower surface that are substantially parallel to each other toward the rear side and a thickness that is substantially the same as the length of the upper rod-shaped member in the up-down direction, The upper rod-shaped member protrudes convexly toward the rear side and connects the right rod-shaped member and the left rod-shaped member.

2. 2. The chair of claim 1, Further provided is a seat on which the user can sit, The right rod-shaped member and the left rod-shaped member are formed linearly from their upper ends to the seat body along the vertical direction.

Images