JP2010259685A - Spring structure and method of manufacturing spring structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spring structure, not only restraining generation of creak sound, but also easily connecting a plurality of wire springs, and enhancing the productivity. <P>SOLUTION: In this spring structure 10, the plurality of wire springs S<SB>1</SB>-S<SB>4</SB>formed by repeatedly bending a wire like a substantially S-shape in a plan view are disposed side by side, and predetermined parts in the wire springs S<SB>1</SB>-S<SB>4</SB>are connected to each other laterally by connecting members 21, 22 to be formed like a panel. The connecting members 21, 22 are resin moldings, including: fit-in parts α<SB>1</SB>-α<SB>4</SB>where the wire springs S<SB>1</SB>-S<SB>4</SB>are fitted and positioned; and belt-like parts β<SB>1</SB>-β<SB>3</SB>connecting the fit-in parts α<SB>1</SB>-α<SB>4</SB>in the lateral direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a spring structure that can be suitably used in a cushion support device for supporting a cushion for a seat of an automobile, and a method for manufacturing the spring structure.

  In order to enhance cushioning, a cushioning material in which a cushioning material such as urethane foam is formed in a panel shape is used for a seating part and a back part of an automobile seat or the like. A plurality of wire springs formed by repeatedly forming a substantially S-shaped bent portion in plan view on a metal wire (see “S spring 22” in FIG. 4 in Patent Document 1) below the cushion material. .) Is provided in parallel with a panel-like spring structure. With this spring structure, the cushion material can be supported with an appropriate elastic force, and the cushion material can be prevented from sinking and the like, and a good sitting comfort can be provided.

  However, in this type of spring structure, the distance between adjacent wire springs increases locally due to the load applied to the cushioning material when seated, etc., and the cushioning material falls into the widened gap, causing the seating Problems such as poor cushioning at the back and back are likely to occur. For this reason, adjacent wire springs are laterally connected by connecting members (see “Double tension spring 6” in FIG. 1, “Tension spring 26” in FIG. 5 and “Tie wire 27” in FIG. 6) in Patent Document 1. Linking in the direction is done.

  Since the wire spring and the connecting member are required to have a certain degree of elasticity in addition to the strength, they are made of steel having a high carbon content. However, since steel containing a lot of carbon is difficult to weld, the wire spring and the connecting member are connected by caulking a metal clip (see “Clip 5” in FIG. 1 in Patent Document 1). It had been. However, in this case, in addition to the problem that a squeak noise is likely to be generated from the connecting portion between the wire spring and the connecting member, the work of caulking the clip is not always easy, and labor and cost for manufacturing the spring structure are reduced. There was also a problem of increasing. There is also a drawback that the spring structure becomes heavy.

  In view of such a situation, until now, by arranging a plurality of wire springs formed in a substantially S shape in plan view in a mold and injecting resin into the mold and curing it. Adjacent wire springs are also connected by a resin connecting member formed integrally with the wire spring (page 4, line 18 to line 26 in Patent Document 2, and patent). (See page 6, lines 48-49 in document 3.) This not only prevents squeak noise generated from the spring structure, but also makes it possible to reduce the weight of the spring structure and to easily manufacture the spring structure (see page 5, page 5 of Patent Document 2). (Refer to the 26th line to the 6th page, the 3rd line, and the 3rd page, the 12th line to the 14th line in Patent Document 3.)

  However, the spring structure in which the connecting member is formed by resin injection molding has the disadvantage that a large mold that can accommodate a plurality of wire springs and a large injection molding machine are required when manufacturing the spring structure. . In addition, this type of spring structure has not always been easy to increase productivity because of the injection molding of the connecting member each time. Furthermore, in this type of spring structure, the wire spring cannot be inserted into the mold or the resin injected into the mold unless the shape of the wire spring is made simple and regular with easy dimensional accuracy. There was a risk of problems such as leaks in areas not anticipated. Therefore, in this type of spring structure, it has been difficult to devise such as changing the spring characteristics depending on the location by changing the shape and arrangement of the wire spring.

  By the way, the method of connecting the bending part of adjacent wire springs using the resin-made clip which has the latching structure which can be wound up is proposed (page 4 page 4 of patent document 4). 30th line to 33rd line and "clip 4" in FIG. 1). However, the clip in the spring structure of Patent Document 4 directly connects the bent portion of one wire spring and the bent portion of another wire spring arranged next to the one wire spring without using a connecting member. Since they were connected, there was not enough room to adjust the spring characteristics (especially the lateral spring characteristics) of the spring structure. Moreover, it can be used only when the bent portions of a pair of adjacent wire springs are arranged close to each other, and depending on the shape and arrangement of the wire springs, the adjacent wire springs cannot be connected. It was.

Japanese Utility Model Publication No. 52-084301 Japanese Utility Model Publication No. 06-0050545 JP 2007-313045 A JP 2005-152482 A

  The present invention has been made to solve the above-mentioned problems, and not only suppresses the occurrence of squeaking noise and reduces the weight, but also allows a plurality of wire springs to be easily connected and produced. It is an object of the present invention to provide a spring structure that can be easily improved. In addition, the spring structure has a high degree of freedom in design, such as the ability to change the shape and arrangement of the wire springs, and can be easily devised to change the spring characteristics depending on the location, which can also improve performance. Is also an object of the present invention. Furthermore, it is also an object of the present invention to provide a cushion support device using the spring structure and a method for manufacturing the spring structure.

The above-described problem is that N wire springs S _{1 to} S _N (N is an arbitrary integer greater than or equal to 2) formed by repeatedly forming a substantially S-shaped bent portion in plan view on a wire are arranged in parallel and adjacent wires. A spring structure formed in a panel shape by connecting predetermined portions in springs S _n and S _{n + 1} (n is an integer of 1 or more and N−1 or less) in a lateral direction with a connecting member, a fitting portion alpha _n for positioning fitted a wire spring S _n, a fitting portion alpha _{n + 1} for positioning by fitting the wire spring S _{n + 1,} the fitting portion alpha _n and fitting portion alpha _{n + 1} and This is solved by providing a spring structure characterized in that it is a resin molded product having a belt-like portion β _n that connects the two in the horizontal direction.

Here, the “substantially S-shape” is a concept that widely includes a shape in which portions protruding to one side and portions protruding to the other are alternately provided, and the bent portion is formed in a substantially semicircular shape. In addition to objects (S-shape (sine curve shape)), it is a concept that includes zigzag shapes (Z-shape), continuous crank shapes, etc., where bent portions are formed in a substantially triangular shape or a substantially square shape, etc. And Further, the wire springs S _{1 to} S _N do not have to be separated from each other, and may be partially or entirely continuous. For example, even when one wire spring formed by repeatedly bending it in a substantially S shape in plan view is folded 180 ° at the middle so that the distal end side and the proximal end side are substantially parallel, If the portion from the distal end portion to the intermediate portion of the wire spring and the portion from the proximal end portion to the intermediate portion are in a parallel positional relationship, the wire spring is counted as two.

In the spring structure of the present invention, since the entire connecting member is formed of resin, it is difficult for squeak noise to occur. Further, the spring structure of the present invention, only the respective fitting portions alpha ₁ to? _N of the connecting member fitting the wire spring _S 1 to S _N, coupling the wire spring _S 1 to S _N in the transverse direction Therefore, it can be easily manufactured and the productivity can be easily increased. Further, since the connecting member against the wire spring S ₁ to S _N can be mounted while somewhat deformed, even if the shape and arrangement of the wire spring S ₁ to S _N has an error, facilitating the coupling member It becomes possible to attach to. Therefore, the shape and arrangement of the wire springs S _{1 to} S _N can be made irregular and difficult to obtain accuracy, and the degree of freedom in designing the spring structure can be increased. Therefore, the performance of the spring structure can be further improved. Furthermore, in the spring structure of the present invention, various variations can be considered in the length, width or thickness of the band-like portion of the connecting member. Therefore, it is also possible to make the length, width or thickness of at least one of the strips β _{1 to} β _N-1 different from the length, width or thickness of the other strips, It is also easy to increase the degree of freedom in designing the spring structure.

In the spring structure of the present invention, the bending pitches and bending angles of the wire springs S _{1 to SN} may be unified for each wire spring or for all the wire springs. However, in this case, it is difficult to apply a device such as changing the spring characteristics of the spring structure depending on the location. For this reason, the folding pitch or folding angle of at least one wire spring S _m (m is an arbitrary integer not less than 1 and not more than N) is non-uniform (even if not all are non-uniform, at least one location is non-uniform). by setting the or.) that if, it is preferable to set the shape of each bent portion of the wire spring S _m and irregular. Spring structure of the present invention, since the very high dimensional accuracy in shape and arrangement of the wire spring is not required, it can also be incorporated easily be wire spring S _m having such irregular shapes.

Here, the "bending pitch" of the wire spring _{S m,} as shown in FIG. 16, the center of curvature of the bent portion of the wire spring _{S m} (points in FIG. _{16 C 1, C 2, C} 3, C 4 ·· ·) of, rather than in the longitudinal direction (the longitudinal direction of the wire itself forming the wire spring S _m of the wire spring S _m, the longitudinal direction of the overall shape of the wire spring S _m. it in the direction of arrow a shown in FIG. 16.) (A pitch P in FIG. 16). Further, the wire is a "bending angle" of the spring S _m, as shown in FIG. 16 refers to the angle at which the wire forms at opposite sides of the bent portion of the wire spring S _m (angle in FIG. 16 theta). When the wire spring S _m is in the shape of warped front side or the rear side of the plane of FIG. 16, "folding pitch" a "bending angle" is in a flat state before deflecting a wire spring S _m to decide.

In the spring structure of the present invention, the wire springs S _{1 to} S _N may all have a congruent shape or a symmetrical shape. In this case, however, it is difficult to devise a method for changing the spring characteristics of the spring structure depending on the location. For this reason, it is preferable that at least one wire spring among the wire springs S _{1 to} S _{N has} a non-congruent shape and an asymmetric shape with other wire springs. Since the spring structure of the present invention does not require high dimensional accuracy in the shape and arrangement of the wire springs, it is a plurality of wire springs that do not have a congruent shape or a plurality of wire springs that do not have symmetry. However, it can be easily incorporated.

In the spring structure of the present invention, it is also preferable to provide an attachment hole or attachment protrusion for attaching the wiring in at least one of the belt _- like portions β _{1 to} β _N-1 . For example, on the lower side of a cushion material of an automobile seat, wiring of a seating sensor for detecting that a person is seated on the seat, or a seatbelt for detecting that a seatbelt is used Various wirings such as sensor wiring are provided. By adopting the configuration as described above, it is possible to attach these wirings to the belt-shaped portion. Since the connecting member in the spring structure of the present invention is a resin molded product, mounting holes and mounting protrusions for wiring can be easily formed.

In the spring structure of the present invention, the fitting portions α _{1 to} α _N are not particularly limited as long as the wire springs S _{1 to SN} can be fitted therein. However, fitting portions alpha ₁ to? _N has a fitting groove for fitting the wire spring _S 1 to S _N, respectively on the lower surface, by covering the connecting member from above the wire spring _S 1 to S _N It is preferable that the wire springs S _{1 to SN} can be fitted into the fitting portions α _{1 to} α _N , respectively. Thus, when the spring structure of the present invention is used as a cushion support device for an automobile seat, the fitting portions α _{1 to} α _N are formed into wire springs S ₁ to S by a load from a cushion material placed on the upper side. It becomes possible to strongly press S _N , and the fitting portions α _{1 to} α _N can be made difficult to come off from the wire springs S _{1 to} S _N. In this case, the fitting groove of the fitting portion alpha ₁ to? _N, respectively engaged with the outer surface of the wire spring _S 1 to S _N wire spring _S 1 to S _N can be prevented from coming off the fitting groove It is more preferable to provide a locking claw for this purpose.

In the spring structure of the present invention, Hamakomimizo of the fitting portion alpha ₁ to? _N may be formed in a straight line, but fitting of at least one of the fitting portions of the fitting portions alpha ₁ to? _N It is also preferable that the insertion groove is formed by bending or bending so that a bending portion or a bending portion of the wire spring (around the corner of the bending portion) can be fitted into the insertion groove. Thereby, it becomes possible to make it difficult to slide an insertion part with respect to a wire spring, and it becomes possible to prevent position shift of a connection member. When all the fitting grooves of the fitting portions α _{1 to} α _N are formed by bending or bending, the bent portions or the bending portions of the wire springs S _{1 to SN} can be fitted into the fitting grooves. More preferred.

However, at this time, when the fitting portions α _{1 to} α _N are formed in a form that is continuous in the direction of the fitting groove and is not easily deformed (a form that cannot be expanded and contracted in the direction of the fitting groove), the shape and arrangement of the wire spring occurred. Depending on the degree of error, it may be difficult to fit the bent portion or curved portion of the wire spring into the fitting groove. Therefore, among the fitting member alpha ₁ to? _N, the fitting portion having a fitting groove formed in at least bent or curved, it is preferable to form the direction of the slits transverse to the fitting Komimizo. As a result, the fitting portion can be expanded and contracted in the direction of the fitting groove, and even if there is some error in the shape and arrangement of the wire spring, it is easy to fit the bent portion or curved portion of the wire spring into the fitting groove. It becomes possible to do.

Further, the above problem is that N wire springs S _{1 to} S _N (N is an arbitrary integer of 2 or more) formed by repeatedly forming a substantially S-shaped bent portion in a plan view on a wire are arranged in parallel and adjacent to each other. fit wire spring _{S n, S n + 1 (} n is 1 or more, all integers less than or equal to n-1) a method of manufacturing the spring structures to be formed in the panel shape by linking transversely connecting member a predetermined location in the Te, by fitting a pre-formed was fitting portion alpha ₁ to? respectively _N wire spring S ₁ to S _N to the connecting member made of a resin molded article, the horizontal direction while positioning the wire spring S ₁ to S _N It is also solved by providing a method for manufacturing a spring structure characterized in that it is coupled to the spring. The meaning is the same as that of the spring structure of the present invention described above.

  As described above, according to the present invention, not only the generation of squeak noise and the weight can be reduced, but also a plurality of wire springs can be easily connected, and the productivity is easily improved. It becomes possible to provide a structure. In addition, the spring structure has a high degree of freedom in design, such as the ability to change the shape and arrangement of the wire springs, and can be easily devised to change the spring characteristics depending on the location, which can also improve performance. Can also be provided. Furthermore, it is possible to provide a cushion support device using the spring structure and a method for manufacturing the spring structure.

It is the perspective view which showed the state which decomposed | disassembled the spring structure of the first embodiment into the wire spring and the connection member. It is the perspective view which showed the spring structure of the 1st embodiment. It is sectional drawing which showed the state which cut | disconnected the wire spring and connection member in the spring structure of 1st embodiment by the surface perpendicular | vertical to the central axis of the wire which forms a wire spring. It is the perspective view which showed the state which decomposed | disassembled the spring structure of the 2nd embodiment into the wire spring and the connection member. It is the perspective view which showed the spring structure of the 2nd embodiment. It is the side view which showed the spring structure of the 2nd embodiment. It is the top view which expanded the insertion part periphery of the connection member in the spring structure of a 2nd embodiment. It is sectional drawing which showed the state which cut | disconnected the wire spring and connection member in the spring structure of 2nd embodiment by the surface perpendicular | vertical to the central axis of the wire which forms a wire spring. It is sectional drawing which showed the state which cut | disconnected the wire spring and connection member in the spring structure of 3rd embodiment by the surface perpendicular | vertical to the central axis of the wire which forms a wire spring. It is the top view to which the attachment hole periphery of the connection member in the spring structure of a 4th embodiment was expanded. It is the top view to which the attachment projection piece periphery of the connection member in the spring structure of a 5th embodiment was expanded. It is the front view which expanded the attachment protrusion piece periphery of the connection member in the spring structure of a 5th embodiment. It is the perspective view which showed the state which decomposed | disassembled the spring structure of 6th embodiment into the wire spring and the connection member. It is the perspective view which showed the spring structure of the 6th embodiment. It is the top view which showed the spring structure of the 6th embodiment. It is the side view which showed the spring structure of 6th embodiment. It is the top view which showed the state which expanded the bending part of the wire spring.

  The spring structure of the present invention will be described more specifically with reference to the drawings. In the following, the spring structure of the present invention will be described by taking six embodiments (first to sixth embodiments) as examples. However, the embodiments of the spring structure of the present invention are limited to these. It is not something. In the following, the spring structure for supporting the cushion material of the seating portion of the automobile seat will be described as an example, and the spring structure of the present invention will be described. It is not limited to this.

1. First, the spring structure of the first embodiment will be described. FIG. 1 is a perspective view showing a state in which the spring structure 10 of the first embodiment is disassembled into wire springs S _{1 to} S ₄ and connecting members 21 and 22. FIG. 2 is a perspective view showing the spring structure 10 of the first embodiment. FIG. 3 is a cross-sectional view showing a state in which the wire spring S ₁ and the connecting member 21 in the spring structure 10 of the first embodiment are cut along a plane perpendicular to the central axis of the wire forming the wire spring S ₁ . is there.

As shown in FIG. 1, the spring structure 10 according to the first embodiment includes four wire springs S _{1 to} S ₄ formed by repeatedly forming S-shaped bent portions on a wire in parallel at predetermined intervals. arranged, as shown in FIG. 2, and is obtained by forming a panel-like linked transversely connecting members 21 and 22 to a predetermined location in the wire springs S ₁ to S _4. The number of locations where the wire springs S _{1 to} S ₄ are connected in the lateral direction is not particularly limited, but in the spring structure 10 according to the first embodiment, the wire spring S ₁ is formed using two connecting members 21 and 22. They are connected in the transverse direction in to S ₄ of the two places.

Among the wire springs S _{1 to} S ₄ , the wire springs S ₁ and S ₂ arranged on the left side in FIG. 1 form each bent portion in one straight wire, and then the wire spring 180 at an intermediate portion thereof. It is formed by folding back. For this reason, the wire springs S ₁ and S ₂ have a continuous form at the end portion on the rear side (the upper side in FIG. 1). The same applies to the wire springs S ₃ and S ₄ arranged on the right side of FIG. Front end of the wire spring S ₁ to S ₄ is mounted on the front side of the frame (not shown) in the seat portion of the seat, hook-shaped portion provided on the rear end portion of the wire spring S ₁ to S ₄ Is attached to a rear frame (not shown) in the seating portion of the seat.

As shown in FIG. 1, each of the connecting members 21 and 22 is a resin molded product having fitting portions α _{1 to} α ₄ and belt-like portions β _{1 to} β ₃ . The fitting portions α _{1 to} α ₄ are for fitting and positioning the wire springs S _{1 to} S ₄ , respectively. On the other hand, the belt-like parts β _{1 to} β _{3 respectively} have the fitting part α ₁ and the fitting part α ₂ , the fitting part α ₂ and the fitting part α ₃ , and the fitting part α ₃ and the fitting part α ₄ . It is for connecting in the direction.

As shown in FIG. 3, the fitting portions α _{1 to} α ₄ have fitting grooves on the lower surface for fitting the wire springs S _{1 to} S ₄ , respectively. engaging claws for S ₁ wire engages the outer surface of the to S ₄ spring S ₁ to S ₄ is prevented from falling off from the fitting groove. Therefore, the spring structure 10 of the first embodiment, as shown in FIGS. 1 and 2, by covering the connecting members 21 and 22 from above the wire spring _S 1 to S _4, the wire spring _S 1 to S ₄ can be fitted into the fitting portions α _{1 to} α ₄ . As shown in FIG. 1, the fitting portions α _{1 to} α ₄ are formed by bending or bending at least one place, and the fitting grooves formed on the fitting portions α _{1 to} α ₄ are also fitted into the fitting portions α _{1 to} α _4. Are bent or curved along the surface. Therefore, the said fitting groove of the fitting portion alpha ₁ to? _4, and is capable of respectively fitting the bent portion or the curved portion of the wire spring S ₁ to S _4. The wire springs S _{1 to} S ₄ can be positioned two-dimensionally by setting the fitting portions α _{1 to} α ₄ in such a form.

2. Next, the spring structure of the second embodiment will be described. The configuration not particularly mentioned is the same as that of the spring structure of the first embodiment. FIG. 4 is a perspective view showing a state in which the spring structure 10 according to the second embodiment is disassembled into wire springs S _{1 to} S ₄ and connecting members 21 and 22. FIG. 5 is a perspective view showing the spring structure 10 of the second embodiment. FIG. 6 is a side view showing the spring structure 10 of the second embodiment. FIG. 7 is an enlarged plan view of the periphery of the fitting portions α ₁ and α ₂ of the connecting member 21 in the spring structure 10 of the second embodiment. 8, the wire springs S ₁ and the connecting member 21 in the spring structure 10 in the second embodiment, in cross-sectional view showing a state taken along a plane perpendicular to the central axis of the wire forming the wire spring S ₁ is there.

As shown in FIG. 4, the spring structure 10 of the second embodiment uses wire springs S _{1 to} S ₄ in which a bent portion having a crank shape in plan view is repeatedly formed. Although the bending angles in the bent portions of the wire springs S _{1 to} S ₄ are all unified at 90 °, the bending pitch is set non-uniformly, and the shapes of the bent portions in the wire springs S _{1 to} S ₄ are set. Are considered irregular. Specifically, bending pitch on the back side of the seat (back凭側) is set narrower than the front side of the bending pitch of the seat, the wire forming the wire spring S ₁ to S ₄ is seat It becomes dense on the back side of the seat and becomes an ancestor on the near side of the seat. For this reason, the spring structure 10 of the second embodiment is capable of exhibiting sufficient elasticity as a whole while firmly supporting the occupant's buttocks on the back side of the seating portion where a larger load is easily applied. It has become.

As shown in FIG. 8, the fitting portions α _{1 to} α ₄ have fitting grooves on the lower surface provided with locking claws similar to those of the spring structure 10 of the first embodiment (see FIG. 3). ing. The point that the fitting groove is formed by bending or bending is similar to the spring structure 10 of the first embodiment. However, in the spring structure 10 of the second embodiment, as shown in FIG. Each of the fitting portions α _{1 to} α ₄ (the fitting portions α ₃ and α ₄ are not shown) is provided with a slit 12a in a direction crossing the fitting groove. Thus, by forming the slits 12a, it is possible to deform the fitting portion alpha ₁ to? ₄ in accordance with the shape of the wire spring _S 1 to S _4, the shape of the wire spring _S 1 to S ₄ Even if there is some error in the arrangement, it is possible to fit the bent portion or curved portion of the wire spring into the fitting groove. Although the location where the slit 12a is provided is not particularly limited, the slit 12a is usually provided at an intermediate point (bend corner) in the bent portion or the curved portion of the fitting groove.

Moreover, in the spring structure 10 of the second embodiment, as shown in FIG. 4, the band-like parts β ₁ and β ₃ in the connecting member 21 are longer than the band-like part β ₂ in the connecting member 21. Furthermore, the band-like parts β ₁ and β ₃ in the connecting member 21 are formed wide at the periphery of the fitting parts α _{1 to} α ₄ , but are formed narrow at the intermediate part thereof. In the spring structure 10 of the present invention, in addition to the connecting members 21 and 22 being resin molded products, the fitting portions α _{1 to} α ₄ in the connecting members 21 and 22 are connected by the belt-like portions β _{1 to} β ₃ . Therefore, by adjusting the length, width, thickness, and the like of the belt-like portions β _{1 to} β ₃ according to the shape and arrangement of the wire springs S _{1 to} S ₄ , a desired spring can be applied to the spring structure 10. Properties can be imparted.

Furthermore, in the spring structure 10 of the second embodiment, as shown in FIG. 6, the wire springs S _{1 to} S ₄ are bent on the upper surface side of the spring structure 10 in the middle, and the back side of the seating portion is It is designed to sink slightly below. For this reason, the spring structure 10 of the second embodiment can support the occupant's buttocks so as to wrap along the shape thereof. The wire springs S _{1 to} S ₄ bent in the upper surface side and the lower surface side of the spring structure 10 are difficult to obtain accuracy in the dimensions, but in the spring structure 10 of the present invention, the error is caused by the connecting portions 21 and 22. Can be absorbed by deformation of the belt-like portions β _{1 to} β ₃ , so that even the wire springs S _{1 to} S ₄ having such a form can be easily incorporated.

3. Next, the spring structure of the third embodiment will be described. The configuration not particularly mentioned is the same as that of the spring structure of the second embodiment. 9, a wire spring S ₁ and the connecting member 21 in the spring structure 10 of the third embodiment, in cross-sectional view showing a state taken along a plane perpendicular to the central axis of the wire forming the wire spring S ₁ is there.

The fitting portions α _{1 to} α ₄ in the spring structure 10 of the third embodiment are the same as the spring structure 10 of the first embodiment or the second embodiment in that they have fitting grooves on the lower surface. There is no locking claw in the locking groove. In the spring structure 10 of the third embodiment, as shown in FIG. 9, an opening / closing lid that covers the lower surfaces of the wire springs S _{1 to} S ₄ fitted in the fitting grooves is provided in place of the locking claws. α _{1 to} α ₄ are provided. The base end of the open / close lid is connected to the vicinity of the fitting portions α _{1 to} α ₄ through a thin hinge portion. On the other hand, a hook-shaped portion for locking to a locking hole provided around the fitting portions α _{1 to} α ₄ in the band-shaped portions β _{1 to} β ₃ is provided at the tip of the opening / closing lid. The fitting portions α _{1 to} α ₄ can more securely remove the wire springs S _{1 to} S ₄ than the fitting portions that lock the outer peripheral surfaces of the wire springs S _{1 to} S _{4 with} the locking claws. It can be prevented.

4). Next, the spring structure of the fourth embodiment will be described. The configuration not particularly mentioned is the same as that of the spring structure of the second embodiment. FIG. 10 is an enlarged plan view of the periphery of the attachment hole 21b of the connecting member 21 in the spring structure 10 according to the fourth embodiment.

As shown in FIG. 10, the spring structure 10 according to the fourth embodiment has an attachment hole 21 b for attaching a wiring to the belt-like portions β ₁ and β ₃ (the belt-like portion β ₃ is not shown) in the connecting member 21. Is provided. Various wirings such as a wiring of a seating sensor for detecting that a person is seated in the seat and a wiring of a seatbelt sensor for detecting the use of a seatbelt are provided in the mounting hole 21b. Can pass through. In the spring structure 10 of the present invention, since the connecting members 21 and 22 are formed of a resin, such attachment holes 21b can be easily provided in the connecting members 21 and 22.

5). Spring Structure of Fifth Embodiment Next, the spring structure of the fifth embodiment will be described. The configuration not particularly mentioned is the same as that of the spring structure of the second embodiment. FIG. 11 is an enlarged plan view of the periphery of the mounting protrusion 21c of the connecting member 21 in the spring structure 10 according to the fifth embodiment. FIG. 12 is an enlarged front view of the attachment protrusion peripheral portion 21c of the connecting member 21 in the spring structure 10 according to the fifth embodiment.

As shown in FIGS. 11 and 12, the spring structure 10 according to the fifth embodiment is provided at the edge on the near side of the band-like parts β ₁ and β ₃ (the band-like part β ₃ is not shown) in the connecting member 21. The mounting protrusion 21c for mounting the wiring is provided. Various wirings can be passed through the mounting protrusions 21c, similarly to the mounting holes 21b in the spring structure 10 of the fourth embodiment. The form of the attachment protrusion 21c is not particularly limited as long as the wiring can be attached, and may be provided in a loop shape. However, in the spring structure 10 of the fifth embodiment, as shown in FIG. It is in a saddle shape. In the spring structure 10 of the present invention, since the connecting members 21 and 22 are resin molded products, the mounting protrusions 21c having such a configuration can be integrally provided on the connecting members 21 and 22.

6). Spring Structure of Sixth Embodiment Finally, the spring structure of the sixth embodiment will be described. The configuration not particularly mentioned is the same as that of the spring structure of the second embodiment. 13, the spring structure 10 of the sixth embodiment is a perspective view showing a disassembled state in a wire spring _S 1 to S ₄ and the connecting members 21 and 22. FIG. 14 is a perspective view showing the spring structure 10 of the sixth embodiment. FIG. 15 is a plan view showing the spring structure 10 of the sixth embodiment. FIG. 16 is a side view showing the spring structure 10 of the sixth embodiment.

In the spring structure 10 of the sixth embodiment, as shown in FIGS. 13 to 15, both the bending pitch and the bending angle of the wire springs S _{1 to} S ₄ are set non-uniformly, and the wire springs S _{1 to} S _4, the shape of each bent portion is not uniform. Specifically, the folding pitch and folding angle on the back side (back side) of the seating portion are generally set to be narrower than the folding pitch and folding angle on the front side of the seating portion. For this reason, the wires forming the wire springs S _{1 to} S ₄ are dense on the back side of the seating portion and are ancestors on the near side of the seating portion. For this reason, the spring structure 10 of the sixth embodiment, like the spring structure 10 of the second embodiment, supports the seated person's buttocks firmly on the back side of the seating portion where a larger load is easily applied. As a whole, it is able to demonstrate sufficient elasticity.

By the way, even if the bending angles of the wire springs S _{1 to} S ₄ are not uniform as in the spring structure 10 of the sixth embodiment, if the bending radius of the bent portion is kept constant, _one wire spring S _{1 to} S _{4 has one} bending radius. Since all the bent portions can be formed by the bending molding machine, the molding cost of the wire springs S _{1 to} S ₄ can be suppressed. Also in the spring structure 10 of the sixth embodiment, the bending radii at the bent portions of the wire springs S _{1 to} S ₄ are uniform.

In the spring structure 10 of the sixth embodiment, as shown in FIG. 15, the wire spring S ₁ and the wire spring S ₄ arranged on the outside, using those symmetrical shape in left and right, inner The wire spring S ₂ and the wire spring S ₃ arranged in the shape of the left and right are also symmetrical. However, the outer wire springs S ₁ and S ₄ and the inner wire springs S ₂ and S ₃ have different shapes that are neither congruent nor symmetrical, and the outer wire springs S ₁ and S ₄ are different from the inner wire spring S. _2, S ₃ becomes harder than so that (hardly deformed in the direction perpendicular to the plane of FIG. 15). In this way, by making the outer side of the spring structure 10 harder than the inner side, it becomes possible to appropriately hold the buttocks when seated on the seat from both the left and right sides, thereby further improving the seating comfort of the seat. it can.
Spring structure 10 of the present invention, since the very high dimensional accuracy in shape and arrangement of the wire spring S ₁ to S ₄ is not required, the incorporation easily be wire springs S ₁ to S ₄ such forms You can also.

7). Application The use of the spring structure of the present invention is not limited, but it is usually used as a spring structure for supporting various cushion materials. In order to take advantage of the features of the spring structure of the present invention, which has a high degree of freedom in design and a high degree of freedom in setting the spring characteristics, such as seats and beds, such as appliances and furniture that require comfort during use (human body) It is suitable as a device for supporting a cushion material of an appliance or furniture). Especially, it is suitable as a spring structure for supporting the seating part of a seat, and the cushion material of a backrest part. In particular, since the spring structure of the present invention has an advantage that squeak noise and rattle are less likely to occur, seats and backrests for vehicle seats such as automobile seats used in an environment with vibrations. It is preferable to use as a spring structure for supporting the cushion material of the part.

DESCRIPTION OF SYMBOLS 10 Spring structure 21 Connecting member 21a Slit 21b Mounting hole 21c Mounting protrusion 22 Connecting member S ₁ wire spring S ₂ wire spring S ₃ wire spring S ₄ wire spring α ₁ insertion part α ₂ insertion part α ₃ insertion part α ₄ fitting part β ₁ belt part β ₂ belt part β ₃ belt part

Claims (11)

N wire springs S _{1 to} S _N (N is an arbitrary integer greater than or equal to 2) formed by repeatedly forming a substantially S-shaped bent portion in plan view on a wire are arranged in parallel, and adjacent wire springs _Sn , A spring structure formed in a panel shape by connecting predetermined portions in S _{n + 1} (n is an integer of 1 or more and N-1 or less) in a lateral direction with a connecting member,
Coupling member includes a fitting portion alpha _n for positioning fitted a wire spring S _n, a fitting portion alpha _{n + 1} for positioning by fitting the wire spring S _{n + 1,} and the fitting portion alpha _n fitting A spring structure characterized in that it is a resin molded product comprising a band-like part β _n that connects the part α _{n + 1} in the lateral direction. Wire spring S _{m (m} is 1 or more, less any integer N) by bending pitch or bending angle of unevenly set, claims the shape of each bent portion of the wire spring S _m is the irregular The spring structure according to 1. 3. The spring structure according to claim 1, wherein at least one of the wire springs S _{1 to} S _{N has} a non-congruent shape and an asymmetric shape with another wire spring. The spring structure according to any one of claims 1 to 3, wherein a length, a width, or a thickness of at least one of the belt _- like portions β _{1 to} β _N-1 is different from a length, a width, or a thickness of another belt-like portion. body. The spring structure according to any one of claims 1 to 4, wherein an attachment hole or attachment protrusion for attaching a wiring is provided in at least one of the belt _- like portions β _{1 to} β _N-1 . The fitting portions α _{1 to} α _N each have a fitting groove for fitting the wire springs S _{1 to SN} on the lower surface, and the connecting member is covered from above the wire springs S _{1 to SN} so that the wire spring _S 1 to S _N of the spring structure of the respective fitting portions alpha ₁ according to any one of claims 1 to 5 to be able to fit in to? _N. Engagement to the fitting groove of the fitting portion alpha ₁ to? _N, is engaged locks with wire spring S ₁ to S _N to the outer surface of the wire spring S ₁ to S _N respectively be prevented from coming off the fitting groove The spring structure according to claim 6, further comprising a pawl. The fitting groove of at least one fitting portion among the fitting portions α _{1 to} α _N is formed by bending or bending, and the bending portion or the bending portion of the wire spring can be fitted into the fitting groove. The spring structure according to claim 6 or 7. The fitting portion having a fitting groove formed by bent or curved out of the fitting portion alpha ₁ to? _N, the spring structure according to claim 8, wherein the formation of the direction of the slits transverse to the fitting Komimizo.   A cushion support device using the spring structure according to claim 1. N wire springs S _{1 to} S _N (N is an arbitrary integer greater than or equal to 2) formed by repeatedly forming a substantially S-shaped bent portion in plan view on a wire are arranged in parallel, and adjacent wire springs _Sn , A method of manufacturing a spring structure, which is formed in a panel shape by connecting predetermined portions in S _{n + 1} (where n is an integer of 1 or more and N−1 or less) in a horizontal direction with a connecting member,
By fitting the previously provided was fitting portion alpha ₁ to? _N, respectively wire spring S ₁ to S _N to the connecting member made of a resin molded product, connected to a horizontal direction while positioning the wire spring S ₁ to S _N A method for manufacturing a spring structure, comprising:

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