JP2017099760A - Support frame for seat and backrest and chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair equipped with a support frame for a seat and a backrest which can prevent breakage at a welding place.SOLUTION: A support frame for a seat and a backrest includes: a seat receiving frame formed by bending a pipe member and by continuously joining at least a fixing part 2a fixed to a support base part, a seat receiving part 2c for receiving and supporting a seat, and a front slanting part 2b for connecting the fixing part 2a and the seat receiving part 2c; and a backrest support frame formed by bending the pipe member and by continuously joining at least a fixing part fixed to the support base part, a backrest support part 3c for supporting a backrest, and a rear slanting part 3b for connecting the fixing part and the backrest support part 3c.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a seat and back support frame and a chair. More specifically, the present invention relates to a structure of a seat and a backrest supporting frame constituted by using a pipe having a small diameter, and a chair provided with such a seat and backrest supporting frame.

  As shown in FIGS. 24A and 24B, the left and right side portions of the support base 106 supported by the legs 105 are used as the structure of the conventional chair seat and backrest support frame configured by using pipes with a small diameter. In addition, a pair of left and right base rods 100 facing in the front-rear direction are provided, a pair of left and right seat support rods 101 extending upward are connected to the front ends of the left and right base rods 100, and at the rear end of the base rod 100 A back support rod 102 extending upward, and supporting the front and both sides of the seat 107 on the upper end of the seat support rod 101, the front portion of the U-shaped seat receiving frame 104 in plan view 104a is fixed, the rear end of the seat support frame 104 is fixed to the back support rod 102, the seat 107 is attached to the seat support frame 104, and the back support 108 is attached to the back support rod 102 Is Patent Document 1).

JP 2012-95932 A

  However, in the structure of the chair seat and the backrest support frame in Patent Document 1, the U-shaped seat receiving frame 104 and the left and right base rods 100 are connected to each other on the front side of the seat by welding. There is a problem that there is a possibility of breakage due to concentration of stress. Further, since the U-shaped seat receiving frame 104 and the connecting rod 103 (as the role of the rear seat frame) are connected by welding in the lateral direction on the rear side of the seat, a load is applied to the backrest by the seating. Since the force acts in the direction of separating the U-shaped seat receiving frame 104 and the connecting rod 103, there is a problem that the welded portion may be damaged. As a result, there is a problem that there is a possibility of breakage at the welded portion. In particular, a chair formed of a pipe having a small diameter has a problem that the possibility increases.

  Therefore, the present invention provides a seat and back support frame that can prevent breakage at a welded portion, while the frame for supporting the chair seat and back support is constituted by a thin pipe, and the seat and back support frame. An object of the present invention is to provide a chair provided with a drooling support frame.

  In order to achieve such an object, the seat and back support frame of the present invention includes a first fixing portion that is fixed to at least a support base in a series of bent pipe members, and a seat receiving portion that receives and supports the seat. And the front inclined portion connecting the first fixing portion and the seat receiving portion are connected to each other, and the seat receiving frame and the pipe member are bent to be fixed to at least the support base in a series. The second fixing portion, the backrest supporting portion that supports the backrest, and the back inclined portion that connects the second fixing portion and the backrest supporting portion have a backrest support frame that is formed in a connected manner. I am doing so.

  Therefore, according to the seat and back support frame, the frame for supporting the seat and the frame for supporting the back back are formed by connecting the pipe member in a series, and in other words, having a welded portion. Because it is formed without any damage, damage due to concentration of large stress at the weld location, damage due to the force acting in the direction of separating the welds between the pipes when a load is applied by seating, It is possible to prevent the durability from being deteriorated due to the hardening of the welded portion and its periphery.

  According to the seat and back support frame, the frame for supporting the seat and the frame for supporting the back back are formed by connecting the pipe member in a series, and thus the seat of the chair. In addition, it is possible to reduce the number of parts because parts for joining the various parts for constituting the frame for supporting the backrest are not necessary, and as a result, the assembly work is simplified and the seat of the chair can be efficiently performed. And a frame for supporting the backrest, and the cost of the frame for supporting the seat and the backrest is reduced.

  In the seat and back support frame of the present invention, the first fixed portion, the front inclined portion, and the seat receiving portion of the seat receiving frame may be M-shaped in a plan view. In this case, a frame for supporting the seat and a frame for supporting the seat and the backrest are formed by a relatively simple and simple bending process.

  Further, the seat and back support frame of the present invention further includes a front horizontal connecting member for connecting the left and right curved portions to each other, the seat receiving frame having a curved portion where the front inclined portion and the seat receiving portion are connected. And each of the left and right end portions of the front horizontal connecting member may be welded to the curved portion in a curved shape. In this case, since the left and right ends of the front lateral connecting member are welded to the curved portion where the front inclined portion of the seat receiving frame and the seat receiving portion are connected, the front lateral connecting member and the seat receiving frame are Are welded as if the weld has a curved shape.

  Further, the seat and back support frame of the present invention further includes a rear lateral connecting member that connects the left and right seat receiving portions of the seat receiving frame, and each of the left and right end portions of the rear lateral connecting member is a seat receiver. It may be formed in a direction along the part and welded linearly to the seat receiving part. In this case, since the left and right end portions of the rear lateral connecting member and the seat receiving portion are arranged so as to be parallel to each other, welding is performed between the rear lateral connecting member and the seat receiving frame. Welded as a straight line.

  The seat and back support frame of the present invention further includes a fixed end portion connected to the rear end portion of the seat receiving portion of the seat support frame, and each of the left and right fixed end portions of the back support frame. It may be formed in a direction along the back support part and welded linearly to the back support part. In this case, since the left and right fixed ends of the seat receiving frame and the backrest supporting portion are arranged so as to be parallel to each other and welded, the seat receiving frame and the backrest supporting frame are welded. The part is welded as a straight line.

  Further, the seat and back support frame of the present invention may be configured such that both the seat receiving frame and the back support frame fit into the seat. In this case, in addition to the frame supporting the seat and the frame supporting the backrest being fixed to the support base, the frame supporting the seat and the frame supporting the backrest by being fitted to the seat The mutual positional relationship is fixed.

  The chair of the present invention is provided with the above-described seat and back support frame. In this case, a chair is realized in which the above-described seat and back support frame functions.

  According to the seat and back support frame of the present invention and the chair provided with this support frame, the damage caused by the concentration of large stress at the welded part, and the direction of separating the pipes when the load is applied by the seating It is possible to prevent damage due to the force applied to the armature and further decrease in durability due to hardening of the welded part and its surroundings, so that safety of the chair can be ensured and durability can be improved. Therefore, it becomes possible to improve the reliability of the chair.

  According to the seat and back support frame of the present invention and the chair provided with the support frame, a frame for supporting the seat and back of the chair efficiently is manufactured by simplifying the assembling work. Since the cost of the frame for supporting the backrest can be reduced, it is possible to provide a highly versatile seat and back support frame.

  The seat and back support frame of the present invention and the chair provided with the support frame support the seat by a relatively simple and simple bending process when the seat receiving frame is M-shaped in plan view. Since the frame can be formed to support the seat and the backrest, the versatility of the seat and the backrest as a support frame can be further improved.

  The seat and back support frame of the present invention, and the chair provided with this support frame, when each of the left and right end portions of the front lateral connecting member is welded to the curved portion of the seat receiving frame in a curved shape In this case, by welding the front horizontal connecting member and the seat frame as a curved part of the welded portion, it is possible to exert stress (resistance force) against deformations and loads in various directions. It is possible to avoid the problem that the portion is easily damaged.

  The seat and back support frame of the present invention, and the chair provided with this support frame, when each of the left and right end portions of the rear lateral connecting member is linearly welded to the seat receiving portion of the seat receiving frame In this case, it is possible to provide a long welded portion by welding the rear lateral connecting member and the seat receiving frame so that the welded portion forms a linear shape, and sufficiently secure the required strength for welding. It is possible to avoid the problem that the portion is easily damaged.

  In the seat and back support frame of the present invention and the chair provided with this support frame, each of the left and right fixed ends of the seat support frame is linearly welded to the back support portion of the back support frame. In this case, it is possible to provide a long welded portion by welding the seat support frame and the back support frame as if the welded portion has a linear shape, and sufficiently ensure the required strength. Thus, it is possible to avoid the problem that the welded portion is easily damaged.

  The seat and back support frame of the present invention and the chair provided with the support frame are arranged such that when the seat receiving frame and the back support frame are fitted to the seat, the back frame and the back support frame are supported. Since the mutual positional relationship with the supporting frame can be fixed by the supporting base and the seat, a part or all of the fixing force and the restraining force required to constitute the whole supporting frame of the seat and the backrest Can be borne on the support base and the seat that are required from the beginning, thereby making it possible to simplify the construction for securing the fixing force and restraining force and to omit parts.

It is the perspective view seen from diagonally forward upper direction which shows the whole structure of the chair of embodiment. It is a right view which shows the whole structure of the chair of embodiment. It is a rear view which shows the whole structure of the chair of embodiment. It is the perspective view seen from diagonally forward upper part which shows the structure of the part relevant to the structure of the support frame of the seat and backrest of this invention. It is a figure of the state which carried out the transparent display of the seat and backrest of FIG. It is a figure of the state which removed the seat and backrest of FIG. It is the perspective view seen from diagonally forward upper part which shows an example of embodiment of the structure of the support frame of the seat and backrest of this invention, and is a figure of the state which removed the support base part upper cover part of FIG. . It is a figure of the state which removed the lever for raising / lowering operation, the frame fixing member, and the pedestal in FIG. It is a figure of the state which removed the front part horizontal connection member and pedestal fixing member of FIG. It is a top view of the state of FIG. It is a top view of the state of FIG. FIG. 10 is a plan view of the state of FIG. 9. FIG. 8 is a right side view of the state of FIG. 7, in a state where the case portion of the support base is displayed in a transparent manner. FIG. 9 is a right side view of the state of FIG. 8, in a state where the case portion of the support base is transmissively displayed. FIG. 10 is a right side view of the state of FIG. 9, and shows a state in which the case portion of the support base is transmissively displayed. It is the perspective view which looked at the seat frame of the embodiment from the right side diagonally upward. It is a top view of the seat frame of an embodiment. It is a bottom view of the seat frame of an embodiment. It is the perspective view which looked at the back frame object of the embodiment from the diagonally upper right side. It is a bottom view of the back frame of an embodiment. It is the disassembled perspective view seen from diagonally forward upper direction which shows other embodiment of a backrest. (A) is a pad. (B) is the left half of the pad (the right half is not shown), the front inner shell, and the rear inner shell. (C) is a back plate member. It is a figure which shows other embodiment of a backrest. (A) is the perspective view which looked at the front inner shell from diagonally rear upper side. (B) is the perspective view which looked at the attachment state to the back board member of a front inner shell from the diagonally forward upper direction, without showing a pad. It is a figure which shows other embodiment of a backrest. (A) is the perspective view which looked at the rear inner shell from diagonally forward. (B) is the perspective view which looked at the attachment state to the back board member of a rear inner shell from the diagonally rear upper direction, without showing a pad. It is the perspective view which looked at the structure of the seat of the conventional chair and the support frame of a backrest from diagonally forward upper direction. It is the perspective view which looked at the structure of the support frame of FIG. 24A from diagonally forward lower.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  FIG. 1 to FIG. 20 show an example of an embodiment of a seat and back support frame of the present invention and a chair provided with this support frame.

  In the present embodiment, a case where the present invention is applied to a chair whose overall configuration is shown in FIGS. 1 to 3 will be described as an example.

  In the description of the present invention, “upper” and “lower”, “front” and “rear”, and “left” and “right” are defined based on the seated person sitting on the chair (in other words, And “up” and “down”, “front” and “rear”, and “left” and “right” as viewed from the seated person).

  The chair of this embodiment includes a support base 1 attached to an upper end of a pedestal 22 standing on a leg feather-type leg base 21, a seat frame 2 and a backrest support frame 3 supported by the support base 1. And a seat 10 that is received and supported by the seat receiving frame 2, and a backrest 15 that is attached to and supported by the backrest support frame 3.

  The leg blade-type leg base 21 has a leg base portion 21a and a plurality of leg blades 21b, which are integrally formed.

  Each of the plurality of leg blades 21b is disposed such that the base end portion is connected to the leg base portion 21a and the longitudinal direction is along the radial direction centering on the leg base portion 21a.

  In the present embodiment, five leg blades 21b are arranged radially, and a caster 23 is provided on the lower surface of each tip. That is, the chair of the present embodiment includes a leg body in a form called a so-called rotating leg. However, the provision of the casters 23 in the leg blades 21b is not an essential configuration in the present invention, and further speaking, it is not an essential configuration in the present invention to have the leg blade type leg base 21 as a leg body.

  The material of the leg base 21 is not limited to a specific material as long as the strength necessary for the leg base can be ensured, and for example, metal or resin can be used.

  A leg column 22 that supports the seat 10 and the backrest 15 via the support base 1 is fitted and attached to the leg base 21 a at the center of the leg base 21.

  Specifically, the leg base 21a is provided with a through hole in the vertical direction with a circular cross section (in other words, in plan view), and the leg column 22 is fitted and fixed to the through hole.

  In this embodiment, the pillar 22 is comprised by the gas spring which has the cylinder 22a and the rod 22b which can be raised / lowered with respect to the said cylinder 22a.

  The cylinder 22a is fitted and fixed in a through hole provided in the leg base 21a, whereby the pedestal 22 (that is, gas spring) is fixed to the leg base 21.

  Specifically, the inner peripheral surface of the through hole of the leg base 21a (in other words, the inner wall constituting the through hole) is tapered such that the inner diameter in the cross section gradually decreases from the upper side to the lower side, that is, It is formed as a slope that gradually approaches toward the center position (that is, the axial center position) in plan view of the through hole as it goes downward, in other words, as a sloped surface that can receive and support a downward load. .

  On the other hand, the cylinder 22a of the gas spring constituting the pedestal 22 in the present embodiment is formed in a tapered shape in which the outer diameter in the cross section gradually decreases as the lower end portion goes from the upper side to the lower side.

  And when the gas spring (cylinder 22a, rod 22b) which comprises the pedestal 22 is inserted from the upper part in the through-hole provided in the leg base 21a of the leg base 21, the taper-shaped part of the lower end side of the cylinder 22a Is fixed to the through hole of the leg base 21a.

  At this time, the inner peripheral surface of the through hole of the leg base 21a is a tapered surface whose inner diameter in the cross section decreases as it goes downward, and the tapered portion on the lower end side of the cylinder 22a goes downward. Since the outer diameter of the cross section is a tapered surface, when the gas spring as the pedestal 22 is inserted into the through hole from above, the tapered portion of the cylinder 22a is inclined so as to support it. The downward load applied to the outer peripheral surface of the tapered portion of the cylinder 22a is supported and supported from the outer peripheral direction by the inner peripheral surface of the through hole, in contact with the inner peripheral surface of the hole (in other words, surface contact).

  Thereby, the gas spring as the pedestal 22 is fitted to the through hole and fixed to the leg base 21a, and then fixed to the leg base 21 and attached.

  A footrest 24 is attached to a position near the upper end of the cylinder 22a of the gas spring as the pedestal 22.

  The footrest 24 includes a base portion 24a at the center portion, a plurality of spokes 24b arranged such that a base end portion thereof is connected to the base portion 24a and a longitudinal direction thereof extends along a radial direction centering on the base portion 24a, and the plurality of spokes 24b. Each of the spokes 24b has an annular footrest 24c attached to and supported by the tip.

  And the footrest 24 is fixed with respect to the pedestal 22 (specifically, the cylinder 22a of the gas spring) by fitting the through hole provided in the base 24a to the cylinder 22a and fixing with a screw or the like. Attached.

  Further, the support base 1 is attached to the tip of the rod 22 b of the gas spring as the pedestal 22.

  The support base 1 supports the seat receiving frame 2 and the backrest support frame 3, and includes a case portion 1A and an upper cover portion 1B that covers the case portion 1A.

  The case portion 1A has a substantially rectangular bottom plate portion 1c and a peripheral wall 1d surrounding the periphery of the bottom plate portion 1c in plan view, and includes a pedestal fixing member 7 and a frame fixing member 8.

  The bottom plate portion 1c of the case portion 1A is provided with a through hole 1e for penetrating the upper end portion of the pedestal 22 (specifically, in the example shown in the drawing, the tip portion of the rod 22b of the gas spring).

  The pedestal fixing member 7 is formed in a substantially cylindrical shape, and an outward flange 7a is formed at the peripheral edge of the lower end. The cylindrical portion is inserted into the through-hole 1e from below, and the flange 7a at the lower peripheral edge is the bottom plate. It welds in the state contact | abutted to the lower surface of the part 1c, and is fixed and attached to the baseplate part 1c by this.

  The frame fixing member 8 is formed in a U-shaped longitudinal section in a side view and has a through-hole 8a formed in the top plate portion, and a size equivalent to the horizontal size of the bottom plate portion 1c of the case portion 1A. It is adjusted and formed.

  The frame fixing member 8 is disposed along the left-right direction, and is disposed in the case portion 1A in a state where the upper end portion of the pedestal column fixing member 7 is passed through the through hole 8a of the top plate portion.

  And the leg pillar fixing member 7 fixed to the case part 1A is fixed to the tip part of the rod 22b of the gas spring as the leg pillar 22 by welding or the like, whereby the support base 1 is attached to the leg pillar 22. Fixed and supported.

  An operation button 22c for locking and unlocking the gas spring is provided at the tip of the rod 22b of the gas spring. The operation button 22c is operated by being pushed in or released by an elevating operation lever 25 attached to the top plate portion of the frame fixing member 8 so as to be swingable up and down.

  The seat and back support frame of the present embodiment includes a first fixing portion 2a (hereinafter simply referred to as “fixing portion 2a”) that is fixed to the support base 1 in a series by bending the pipe member. And a seat receiving portion 2c that receives and supports the seat 10, a front inclined portion 2b that connects the fixing portion 2a and the seat receiving portion 2c, and a fixed end portion 2d that continues to the seat receiving portion 2c are formed in a connected manner. The seat receiving frame 2 and the pipe member are bent to support the backrest 15 and the second fixing portion 3a (hereinafter simply referred to as “fixing portion 3a”) fixed to the support base 1 in a series. The backrest support portion 3c and the rear inclined portion 3b that connects the fixed portion 3a and the backrest support portion 3c have a backrest support frame 3 formed in a connected manner.

  The seat frame 2 is connected to the left and right fixing portions 2a attached to the support base 1 and fixed in the assembled state as a chair, and to both left and right ends of the fixing portion 2a in the left and right directions. And a pair of left and right front inclined portions 2b, 2b extending forward while being inclined upward and connected to the front end of each of the pair of left and right front inclined portions 2b, 2b and extending backward. A pair of left and right seat receiving portions 2c, 2c to be extended, and a pair of left and right fixed end portions that are connected to the rear ends of the pair of left and right seat receiving portions 2c, 2c and extend upward while tilting forward. 2d, 2d.

  With the above-described configuration, the seat receiving frame 2 is connected to the fixed portion 2a, the front inclined portion 2b, and the seat receiving portion 2c so as to have a forward M shape (a shape close to an M shape) in plan view.

  The seat receiving frame 2 is not welded (in other words, without a welded portion), and the pipe member is bent, and the fixed portion 2a, the front inclined portion 2b, the seat receiving portion 2c, and the fixed portion are integrated as a series. The end 2d is formed continuously.

  The left fixed portion 2a, the front inclined portion 2b, the seat receiving portion 2c, and the fixed end portion 2d, and the right fixed portion 2a, the front inclined portion 2b, the seat receiving portion 2c, and the fixed end portion 2d are the left side and the right side. Are continuously formed as a single unit by a single pipe member, or the left side portions 2a, 2b, 2c, and 2d and the right side portions 2a, 2b, 2c, and 2d Each may be formed separately by one pipe member (that is, a total of two pipe members).

  When the left and right portions 2a, 2b, 2c, and 2d of the seat receiving frame 2 are formed as separate bodies by separate pipe members, for example, the left side of the fixing portion 2a is used as a dividing point. Each part 2a, 2b, 2c, and 2d and the right part 2a, 2b, 2c, and 2d are separated and formed as a pair of left and right frames having a form that is plane-symmetric with respect to the vertical plane in the front-rear direction. To be. As a result, each of the pair of left and right frames constituting the seat receiving frame 2 even if left and right are separated from each other is not welded, and a single pipe member is bent to form a fixed part as a single unit. 2a, the front inclined part 2b, the seat receiving part 2c, and the fixed end part 2d are formed continuously.

  When the left and right parts 2a, 2b, 2c, and 2d of the seat receiving frame 2 are formed as separate bodies by separate pipe members, the left and right fixing parts 2a and 2a are each used as a chair. In the assembled state, it may be formed and disposed so as to be in the left-right direction as described above, or may be formed and disposed so as to be in the front-rear direction. When the left and right fixing parts 2a and 2a are formed and arranged so as to be in the front-rear direction, the pair of left and right frames constituting the seat frame 2 are aligned rearward in plan view. It becomes a shape close to a V shape.

  Further, since the fixed portion 2a, the front inclined portion 2b, the seat receiving portion 2c, and the fixed end portion 2d are formed by bending a pipe member, the connecting portion 2ab between the fixed portion 2a and the front inclined portion 2b, the front inclined portion The connecting portion 2bc between the portion 2b and the seat receiving portion 2c and the connecting portion 2cd between the seat receiving portion 2c and the fixed end portion 2d are both curved.

  Of these, the connecting portion 2cd between the seat receiving portion 2c and the fixed end portion 2d is such that the effect on the shape of the seat frame 11 can be reduced when it is accommodated in the seat frame 11 of the seat 10. The bending diameter is set to a small value. The value of the bending diameter (radius) of the connecting portion 2cd between the seat receiving portion 2c and the fixed end portion 2d is not limited to a specific value, but is specifically set to about 13 to 17 mm, for example. , And preferably about 15 mm. Furthermore, it is preferable to set the minimum value among the values of the bending diameter considered to be possible in consideration of the material, outer diameter, inner diameter and the like of the seat receiving frame 2.

  On the other hand, the backrest support frame 3 is connected to the left and right fixing portions 3a that are attached to the support base 1 and fixed in the assembled state as a chair, and the left and right ends of the fixing portion 3a are connected to the left and right sides. A pair of left and right rear inclined portions 3b, 3b that slant outward and extend rearward while being inclined upward, and a rear end portion of each of the pair of left and right rear inclined portions 3b, 3b. It has a pair of left and right back support portions 3c, 3c that extend upward while inclining forward.

  With the above-described configuration, the backrest support frame 3 has a shape close to a rearward V-shape in plan view.

  The backrest support frame 3 is not welded (in other words, without a welded portion), and the pipe member is bent so that the fixed portion 3a, the rear inclined portion 3b, and the backrest support portion 3c are integrated as a series. Are formed continuously.

  The left fixed portion 3a, the rear inclined portion 3b, and the backrest support portion 3c, and the right fixed portion 3a, the rear inclined portion 3b, and the backrest support portion 3c have one pipe on both the left and right sides. Even if they are continuously formed as a single unit by a member, or each of the left portions 3a, 3b, and 3c and the right portions 3a, 3b, and 3c (one in total). The pipe member may be formed as a separate member.

  When the left and right portions 3a, 3b, and 3c of the backrest support frame 3 are formed as separate members by separate pipe members, for example, each of the left portions with the middle of the fixing portion 3a as a dividing point 3a, 3b, and 3c are separated from the right side portions 3a, 3b, and 3c, and are formed as a pair of left and right frames having a form that is plane-symmetric with respect to a vertical plane in the front-rear direction. . As a result, even if the left and right are separated, the pair of left and right frames constituting the backrest support frame 3 by combining the left and right sides are not welded, and a single pipe member is bent and fixed as a single unit. The part 3a, the back inclined part 3b, and the backrest support part 3c are continuously formed.

  When the left and right portions 3a, 3b, and 3c of the back support frame 3 are formed as separate bodies by separate pipe members, the left and right fixing portions 3a and 3a are each assembled as a chair. In the state, it may be formed and disposed so as to be in the left-right direction as in the above-described embodiment, or may be formed and disposed so as to be in the front-rear direction.

  The back support frame 3 is further connected to the upper ends of the pair of left and right back support parts 3c, 3c so as to support the back support 15 in the assembled state as a chair in the left-right direction (in other words, in other words , Inward) a pair of left and right reeds may be formed and included.

  In the present embodiment, the pair of left and right fixed ends 2d, 2d of the seat receiving frame 2 are connected to the rear end of the seat receiving portion 2c in a direction along the back support portion 3c of the back support frame 3. It bends and is welded and attached in a straight line to the backrest support 3c. That is, the seat receiving frame 2 and the backrest support frame 3 are welded so that a welded portion between the pair of left and right fixed end portions 2d and 2d and the backrest support portions 3c and 3c forms a linear shape.

  As described above, the fixed end 2d of the seat receiving frame 2 and the back support 3c of the back support frame 3 are arranged so as to be parallel to each other, and are welded and attached in a straight line. By doing so, the welded portion can be provided long, and it is possible to avoid the problem that the required strength is sufficiently secured and the welded portion is easily damaged.

  The material of the pipe member that forms and constitutes the seat support frame 2 and the back support frame 3 is not limited to a specific material. For example, the strength, durability, and bending processing required in consideration of the application, etc. In consideration of the ease of the above, an appropriate one is appropriately selected. Specifically, for example, steel, stainless steel, or aluminum alloy can be selected as the material of the pipe member.

  Further, the outer diameter and inner diameter of the pipe member (and the thickness of the pipe determined by these) are not limited to specific values, and for example, the strength and bending work required in consideration of the application etc. In consideration of the ease of the above, it is appropriately set to an appropriate value.

  In addition to the hollow pipe, a solid solid bar can be used as the pipe member. That is, the pipe member in the description of the present invention includes a hollow pipe and a solid solid bar.

  The above-described fixing portion 2a of the seat receiving frame 2 is disposed along the left-right direction at a front position of the pedestal fixing member 7 fixed to the bottom plate portion 1c of the case portion 1A of the support base 1.

  Further, the fixing portion 3 a of the back support frame 3 is disposed along the left-right direction at a rear position of the pedestal fixing member 7 fixed to the bottom plate portion 1 c of the case portion 1 A of the support base 1.

  The fixing portion 2a of the seat receiving frame 2 has a lower end portion joined to the upper surface of the bottom plate portion 1c of the case portion 1A by welding or the like, and an upper end portion of the frame fixing member 8 disposed on the case portion 1A. Joined to the lower end of the front side wall by welding or the like.

  The fixing portion 3a of the backrest support frame 3 has a lower end portion joined to the upper surface of the bottom plate portion 1c of the case portion 1A by welding or the like, and a frame fixing member 8 having an upper end portion disposed on the case portion 1A. It is joined to the lower end of the rear side wall by welding or the like.

  Thereby, the seat receiving frame 2 and the backrest support frame 3 are fixed and attached to the support base 1.

  In addition, the frame fixing member 8 is joined to the periphery of the through hole 8a of the top plate portion by welding or the like with the pedestal fixing member 7.

  The seat receiving frame 2 is provided with a front lateral connecting member 4 for restricting the front portion of the pair of left and right seat receiving portions 2c, 2c to be fixed and for supporting the front portion of the seat 10, Further, a rear lateral connecting member 5 is provided for restricting the distance between the rear portions of the pair of left and right seat receiving portions 2c, 2c to be fixed and for supporting the rear portion of the seat 10.

  The front horizontal connecting member 4 is disposed along the left-right direction between a pair of left and right connecting portions 2bc of the seat receiving frame 2 (that is, a curved portion where the front inclined portion 2b and the seat receiving portion 2c are connected). .

  The front horizontal connecting member 4 is joined by welding so that the left and right ends are connected to each other at the pair of left and right connecting portions 2bc and 2bc of the seat frame 2, respectively. By being fixed to the seat receiving frame 2, it is attached.

  Here, the connecting portion 2bc of the seat receiving frame 2 includes a front inclined portion 2b that is inclined to the left and right outwards and that is inclined upward and extends forward, and a seat receiving portion 2c that extends rearward. Is a curved portion connected to each other. For this reason, both left and right end portions (left and right end surfaces) of the front horizontal connecting member 4 are formed so as to follow the curved shape of the connecting portion 2bc, and are welded and attached to the connecting portion 2bc in a curved shape. That is, the front horizontal connecting member 4 and the seat receiving frame 2 are welded so that the welded portions between the left and right ends of the front horizontal connecting member 4 and the connecting portions 2bc and 2bc form a curved shape.

  In this way, the front horizontal connecting member 4 and the seat receiving frame 2 are welded and attached in a curved shape at the connecting portion 2bc, thereby allowing deformation and loads in various directions (for example, left and right seat receiving portions). 2c and 2c can be exerted stress (resistance force) against left and right outward deformation and downward load due to seating, etc., avoiding the problem that the welded portion is easily damaged. It becomes possible. Further, because of the relationship between the direction of the front inclined portion 2b and the direction of the seat receiving portion 2c in the present embodiment, a part of the welded portion in the connecting portion 2bc functions to receive and support a downward load from below. The lateral connection member 4 can firmly receive and support the front portion of the seat 10.

  The front lateral connecting member 4 is not in direct contact with the support base 1, that is, is not supported by the support base 1.

  On the other hand, the rear horizontal connecting member 5 is formed by bending a single pipe member made of the same material as the seat receiving frame 2 and the backrest supporting frame 3, for example, in the assembled state as a chair, The pair of left and right attachment portions 5b and 5b that are connected to the both end portions in the left-right direction of the horizontal flange portion 5a and extend forward are formed as continuous ones.

  The rear horizontal connecting member 5 has a pair of left and right seat receiving portions 2c, 2c at the rear end portions of the pair of left and right seat receiving portions 2c, 2c of the seat receiving frame 2, respectively. Are fixedly attached to the seat frame 2 by being joined together by welding.

  Here, the pair of left and right mounting portions 5b and 5b of the rear lateral connecting member 5 are formed to bend in the direction along the seat receiving portion 2c of the seat receiving frame 2 so as to be connected to the left and right end portions of the lateral flange portion 5a. The seat receiving portion 2c is welded and attached in a straight line. In other words, the rear horizontal connecting member 5 and the seat receiving frame 2 are welded so that the welded portion between the pair of left and right mounting portions 5b and 5b and the seat receiving portions 2c and 2c forms a linear shape.

  In this way, the mounting portion 5b of the rear lateral connecting member 5 and the seat receiving portion 2c of the seat receiving frame 2 are arranged so as to be parallel to each other, and are then welded and attached in a straight line. Thus, it is possible to provide a long welded portion, and it is possible to avoid the problem that the required strength is sufficiently secured and the welded portion is easily damaged.

  The rear lateral connecting member 5 is not in direct contact with the support base 1, that is, is not supported by the support base 1.

  The seat 10 is bridged between a pair of left and right seat receiving portions 2c, 2c of the seat receiving frame 2, and is placed on the pair of left and right seat receiving portions 2c, 2c.

  The seat 10 has a generally rectangular seat frame 11 in plan view, and a mesh-like seat film member 14 having a tension and strength sufficient to form a seating surface with the periphery supported by the seat frame 11 and stretched. And have.

  The seat frame 11 of the seat 10 is integrally connected, and in the assembled state as a chair, the front frame side 11a in the left-right direction, the pair of right and left right and left frames 11b and 11b in the front-rear direction, and the left-right direction It is formed as a substantially rectangular frame having four belt-like frame sides of the rear frame side 11c.

  The seat frame 11 has substantially U-shaped grooves 12b and 12b formed on the lower surfaces of the right and left frame sides 11b and 11b, and a substantially U-shaped groove 12c formed on the lower surface of the rear frame side 11c. Have

  The seat 10 is configured such that the grooves 12b and 12b on the lower surface of the right and left frame sides 11b and 11b of the seat frame 11 are fitted in the left and right seat receiving portions 2c and 2c of the seat receiving frame 2, respectively. The groove 12 c on the lower surface of the side 11 c is fitted to the rear lateral connecting member 5, so that the seat receiving frame 2 is mounted.

  The seat frame 11 of the seat 10 is not an embodiment in which the grooves 12b and 12c are used, but the left and right seat receiving portions 2c and 2c of the seat receiving frame 2 and the rear lateral connecting member 5 by fasteners and joints such as screws. You may make it attach to. In this case, a separate fixing component such as a receiving or gripping state interposed between the seat frame 11 and the seat receiving portion 2c or the rear lateral connecting member 5 may be used.

  The seat frame 11 of the seat 10 is mounted on the pair of left and right seat receivers 2c, 2c, and the front frame side 11a is screwed to the front horizontal connecting member 4 and the rear frame side 11c is The connecting member 5 is fixed by screwing.

  The seat frame 11 of the seat 10 is also vertically inclined while tilting forward at the left and right edges of the rear frame side 11c (in other words, the rear end positions of the right and left frame sides 11b and 11b). And a pair of left and right through-holes 13 and 13 having a cross section perpendicular to the penetration direction formed in a long hole shape.

  And the fixed end 2d of the seat receiving frame 2 and the back support part 3c of the back support frame 3 penetrate the left and right pair of through holes 13 and 13 from the bottom to the top side by side.

  In addition, the material and aspect of the seat 10 are not limited to a specific type, and an appropriate one is appropriately selected in consideration of, for example, the required strength in consideration of the application. Specifically, for example, as the material of the seat frame 11 of the seat 10, various resins such as glass-filled nylon can be selected.

  On the other hand, the backrest 15 is attached to the pair of left and right backrest support portions 3c and 3c so as to rise from the pair of right and left backrest support portions 3c and 3c of the backrest support frame 3.

  The backrest 15 includes a generally rectangular back frame 16 in a front view, and a mesh-like back membrane having a tension and strength sufficient to form a backrest surface with the periphery supported by the back frame 16 and stretched. And a member 19.

  The back frame 16 of the backrest 15 is integrally connected, and in the assembled state as a chair, the left and right upper frame sides 16a, the pair of left and right upper and lower right and left frame sides 16b and 16b, and the left and right direction The lower frame side 16c is formed as a substantially rectangular frame having four belt-like frame sides.

  The back frame body 16 of the backrest 15 is also open at the lower end surface of the back frame body 16 at the lower end portion of each of the right and left frame sides 16b and 16b, and the right and left frame sides 16b and 16b. A pair of left and right back frame receiving holes 17 and 17 are formed along the direction of 16b and parallel to each other. Further, the inner side of each of the pair of left and right back frame receiving holes 17 and 17 (that is, the backrest 15). A pair of left and right sides that are formed along the direction of the back frame receiving hole 17 and open at the lower end surface of the back frame body 16. The seat frame receiving recesses 18 and 18 are provided.

  The backrest 15 is supported by the backrest support frame 3 that protrudes upward through the through holes 13 of the seat frame 11 of the seat 10 in the pair of left and right back frame receiving holes 17, 17. When the portion 3c is inserted and fitted, the backrest support frame 3 is mounted.

  The back frame receiving hole 17 of the backrest 15 and the backrest supporting portion 3c of the backrest supporting frame 3 are inserted into the backrest supporting portion 3c from the lower end opening of the back frame receiving hole 17 as necessary. For example, they are fixed to each other by a fastener or a joint such as a screw screwed in the front-rear direction from the rear surface of the back frame body 16, or are bonded to each other using a pre-applied adhesive.

  The back frame body 16 of the backrest 15 is not an embodiment in which the back frame receiving holes 17 and 17 are used, but a pair of left and right backrest support portions 3c of the backrest support frame 3 by means of fasteners and joints such as screws. You may make it attach to 3c. In this case, a separate fixing component such as a receiving or gripping state interposed between the back frame body 16 and the backrest support portion 3c may be used.

  Each of the pair of left and right fixed ends 2d, 2d of the seat receiving frame 2 that protrudes upward through the through hole 13 of the seat frame 11 of the seat 10 is a pair of left and right seat frame receivers of the backrest 15. The recesses 18 and 18 are inserted and fitted.

  In addition, the material and aspect of the backrest 15 are not limited to a specific type, and an appropriate one is appropriately selected in consideration of, for example, a required strength in consideration of the application. Specifically, for example, as the material of the back frame 16 of the backrest 15, various resins such as glass-filled nylon can be selected.

  Further, for example, the seat 10 can be received and supported by the pair of left and right seat receiving portions 2c, 2c of the seat receiving frame 2, and the seat 10 can be fitted with the seat frame 11 or the back frame 16 of the backrest 15. When the space between the pair of left and right seat receiving portions 2c, 2c of the seat receiving frame 2 can be constrained so as to be fixed by the fixing force due to the fitting, the front horizontal connecting member 4 and the rear horizontal connecting member 5 One or both of them may not be provided (in this respect, the front lateral connecting member 4 and the rear lateral connecting member 5 are a pair of left and right seat receiving portions 2c, 2c is used to assistly fix and support the front and rear portions of the seat 10). In this case, if necessary, the seat receiving portion 2c of the seat receiving frame 2 and the right and left frame sides 16b of the seat frame 11 of the seat 10 are fixed to each other by fasteners / joints such as screws. Or glued together using a pre-applied adhesive.

  Further, for example, the seat receiving frame 2, the seat 10, the backrest support frame 3, and the backrest 15 are mutually fixed by a fixing force by fitting with the grooves 12 b and 12 c on the lower surface of the seat frame 11 of the seat 10 and the through hole 13. The pair of left and right fixed ends 2d and 2d of the seat receiving frame 2 are not provided (in other words, not formed), for example, when the seating frame 2 can be constrained so as to be fixed to the required degree. You may do it.

  Further, in the present invention, the backrest 15 is not an essential configuration, and the seat receiving frame 2 as a support frame of the seat 10 can be used even in a chair that does not include the backrest 15. In the case of a chair that does not include the backrest 15, the pair of left and right backrest support portions 3c, 3c of the backrest support frame 3 is a pair of left and right seat frames 11 of the seat 10 as in the above-described embodiment. Rather than penetrating the through holes 13 from the lower side to the upper side, it is formed shorter than in the case of the above-described embodiment, and the upper end of the recess is provided in place of the through hole 13 of the seat frame 11 of the seat 10. The seat 10 may be configured to support (subsidiarily) the contact. In this case, the backrest support frame 3 in the above embodiment is called a seat support frame, and the pair of left and right backrest support portions 3c, 3c in the backrest support frame 3 in the above embodiment is a pair of left and right. It is called a seat support part.

  According to the seat and back support frame having the seat receiving frame 2 and the back support frame 3 having the above-described configuration, and the chair including the support frame, the seat support frame 2 and the back support as the support frame of the seat 10 are provided. Each of the back support frame 3 as the support frame 15 and the seat support frame 2 and the back support frame 3 as the whole support frame of the seat 10 and the back support 15 are formed by bending the pipe member. In other words, it is formed without having a welded portion, so that when the stress is applied to the welded part due to the concentration of a large stress or when a load is applied by seating, the pipes This prevents damage due to the force acting in the direction in which the welds are pulled apart, as well as deterioration of durability due to hardening of the welded part and its surroundings. It can be, it is possible to improve the durability while securing a chair safety, and by extension it is possible to improve the chair reliability.

  According to the seat and the back support frame having the seat receiving frame 2 and the back support frame 3 having the above-described configuration and the chair including the support frame, the seat receiving frame 2 as the support frame of the seat 10 Each of the backrest support frame 3 as a support frame of the backrest 15 and the seat receiving frame 2 and the backrest support frame 3 as the entire support frame of the seat 10 and the backrest 15 are bent, and the pipe member is bent. As a result, the number of parts is reduced because there is no need for parts for joining the various parts for constructing the frame that supports the seat and back of the chair. As a result, a frame that supports the seat and the backrest of the chair efficiently is manufactured by simplifying the assembly work, and the frame that supports the seat and the backrest. Can be inexpensive cost, it is possible to provide a versatile seat and backrest support frame.

  Although the above-described embodiment is an example of a preferred embodiment for carrying out the present invention, the embodiment of the present invention is not limited to the above-described embodiment, and the present invention is not limited to the scope of the present invention. The invention can be variously modified.

  For example, in the above-described embodiment, the present invention is applied to the chair whose overall configuration is shown in FIG. 1 to FIG. 3, but the specific shape and mode of each component of the chair to which the present invention can be applied are as follows. These are not limited to those in the above-described embodiment, and are appropriately selected based on the use and design of the chair. Specifically, a configuration in which the fixing portion 2a of the seat receiving frame 2 and the fixing portion 3a of the back support frame 3 are attached and fixed, that is, a configuration corresponding to the case portion 1A of the support base 1 in the above-described embodiment. If it is provided with at least, the aspect of a chair, the shape of each structural member, etc. may be what.

  Further, in the above-described embodiment, the backrest 15 is configured to have a rectangular back frame body 16 and a mesh-like back membrane member 19 that is stretched with a peripheral edge supported by the back frame body 16. However, the configuration aspect of the backrest is not limited to that in the above-described embodiment, and the backrest may be configured by, for example, a resin plate material. In this case, the backrest may be configured only by the plate-shaped member (back plate), or the plate-shaped member (back plate) may be covered with the pad to configure the backrest. Anyway.

  Specifically, for example, as shown in FIGS. 21 to 23, the backrest is configured as having a resin back plate member 31 and a cloth pad 32 covering the back plate member 31. Good (In FIGS. 21 to 23, the backrest provided with the left and right armrests 34, 34 is taken as an example). In this case, for example, the pad 32 is formed in a bag shape having a lower end opening, and a resin-made front inner shell 33A having flexibility is attached to the lower end portion of the inner side surface of the front surface portion 32A of the pad 32 and the rear surface portion. A resin rear inner shell 33B having flexibility is attached to the lower end portion of the inner side surface of 32B. A pair of left and right hooks 33c and 33c are provided at the lower ends of the front and rear inner shells 33A and 33B, and the pair of left and right hooks 33c and 33c are engaged with the lower end surface of the back plate member 31. A pair of recesses is formed. Then, each of the pair of left and right hooks 33c and 33c engages with the pair of left and right recesses, whereby the pad 32 is attached to the back plate member 31 via the front and rear inner shells 33A and 33B. At this time, the dimension between the pair of left and right hooks 33c, 33c of each of the front and rear inner shells 33A, 33B is based on the dimension between the pair of left and right recesses along the plate shape of the back plate member 31. As a result, the front / rear inner shells 33A and 33B follow the shape of the lower end portion of the back plate member 31 in a state where each of the pair of left and right hooks 33c and 33c is engaged with the pair of left and right recesses. Deform. At this time, the front inner shell 33A and the front surface portion 32A of the pad 32 are further connected to the rear inner shell 33B and the rear surface portion 32B of the pad 32 at the portion where the front and rear inner shells 33A and 33B are attached. Are joined to each other so that they are not separated from each other (preferably, they are brought into close contact with each other), so that the pad 32 is formed along the shape of the lower end portion of the back plate member 31 together with the front and rear inner shells 33A and 33B Since it comes to be attached, the pad 32 does not float with respect to the back plate member 31. Therefore, it is possible to prevent the portion where the pad 32 is slackened from being damaged and being injured, or from being deteriorated in appearance. In particular, by adjusting the shape of the front inner shell 33 </ b> A, the backrest surface can be shaped as intended.

DESCRIPTION OF SYMBOLS 1 Support base part 2 Seat receiving frame 2a Fixed part 2b Front inclination part 2c Seat receiving part 2d Fixed end part 3 Backrest support frame 3a Fixed part 3b Back inclination part 3c Backrest support part 4 Front side horizontal connection member 5 Rear side horizontal connection member 7 Pillar fixing member 8 Frame fixing member 10 Seat 11 Seat frame body 14 Seat membrane member 15 Backrest 16 Back frame body 19 Back membrane member

Claims (7)

  A pipe member is bent and a series of at least a first fixing portion fixed to the support base, a seat receiving portion for receiving and supporting the seat, and a forward inclined portion connecting the first fixing portion and the seat receiving portion. A seat frame that is formed in a connected manner, a pipe member is bent, and at least a second fixing portion that is fixed to the support base, and a backrest support portion that supports the backrest, A seat and backrest support frame, wherein the rear inclined portion connecting the second fixed portion and the backrest support portion has a backrest support frame formed in a connected manner.   The seat and back support frame according to claim 1, wherein the first fixing portion, the forward inclined portion, and the seat receiving portion of the seat receiving frame are M-shaped in a plan view.   The seat receiving frame has a curved portion where the front inclined portion and the seat receiving portion are connected to each other, and further includes a front lateral connecting member that connects the left and right curved portions, and the front lateral connecting member 2. The seat and back support frame according to claim 1, wherein both left and right end portions are welded to the curved portion in a curved shape.   The seat receiving frame further includes a rear horizontal connecting member that connects the left and right seat receiving portions, and each of the left and right end portions of the rear horizontal connecting member is formed in a direction along the seat receiving portion. The seat and back support frame according to claim 1, wherein the support frame is welded linearly to the portion.   A fixed end portion is further formed in connection with a rear end portion of the seat receiving portion of the seat receiving frame, and each of the left and right fixed end portions is formed in a direction along the back support portion of the back support frame. 2. The seat and back support frame according to claim 1, wherein the support frame is linearly welded to the back support portion.   2. The seat and back support frame according to claim 1, wherein both the seat receiving frame and the back support frame are fitted to the seat.   A chair comprising the seat and backrest support frame according to any one of claims 1 to 6.