JPH09392A - Spring structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spring structure liable to bend and generating no noise in the bending. SOLUTION: In a spring structure formed by disposing a plurality of coiled springs 22 having on both ends of a spring part 22a end face parts 22b, 22c in the rectangular form to join the end face parts of adjacent coiled springs with each other by a helical wire 24, a releasing part 25 releasing the longitudinal joining condition of the spring structure by the helical wire in one end face part of the coiled spring is formed in the longitudinal halfway of the spring structure. A buffer member 31 having a buffer part 32 put between end face parts released from the joining condition is attached on one end face part side of the coiled spring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring structure used for a mattress or the like.

[0002]

2. Description of the Related Art Generally, a mattress has a rectangular spring structure formed by arranging a large number of coil springs in a matrix and connecting upper and lower end face portions of adjacent coil springs by helical lines.

The mattress is constructed by laminating a sheet-shaped elastic material on at least the upper and lower surfaces of the spring structure and covering the laminated body with a cloth outer body sewn in a bag shape. . The upper and lower peripheral edges of the spring structure are provided with a frame wire formed of a hard wire material in order to reduce the coupling degree of the coil spring, to reinforce the peripheral coil spring, and to maintain the outer shape of the mattress. I am trying to provide it.

The mattress thus constructed is used by being placed on the floor plate provided on the base of the bed. Beds include so-called wake-up beds that are used by people who have difficulty getting up by themselves, such as the sick and the elderly.

[0005] In the wake-up type bed, a floor plate is divided into a plurality of floor portions, and a floor portion corresponding to the back of the user, ie, a raised floor portion, is rotatably provided. The back raised floor is driven up and down by a drive device. Therefore,
A user lying on the floor board via a mattress is able to raise the upper half of the body by driving the raised back floor portion in the rising direction.

The mattress used for such a wake-up bed must have a structure that bends according to the rising of the back-raising floor of the floor plate. However, as described above, in the spring structure, the adjacent end surfaces of the coil springs arranged in a rectangular shape are connected by the helical wire.

Therefore, when the back-raising floor is driven upward to raise the upper half of the user's body, a large tensile force is generated on the lower surface side in the thickness direction of the spring structure of the mattress that is bent accordingly. . In the spring structure, since the end faces of the coil springs adjacent to each other in the longitudinal direction are connected by the helical wire, a large drag force is generated against the tensile force. Therefore, even if the back raised floor portion is raised, the spring structure, that is, the mattress may not be smoothly bent.

Therefore, the applicant of the present application filed Japanese Patent Application No. 5-8852.
The mattress device shown in No. 2 was proposed. In this mattress device, coil springs are arranged in a rectangular shape, and adjacent end surface portions of the coil springs are connected by a helical wire, and the end surface portion of the coil spring on the lower surface side of the spring unit (spring structure) is connected to the spring unit. The connection by the helical line along the longitudinal direction of the spring unit is released so that no tensile force is generated on the lower surface side of the spring unit when it is bent.

With such a structure, the mattress can be smoothly bent when the raised back floor is raised. However, if the lower end face of the coil spring constituting the spring unit is released from the coupled state, the spring unit may be bent,
When extending, for example, the end faces of adjacent coil springs whose coupling state has been released may collide with each other to generate noise, which may cause discomfort to the user.

[0010]

As described above, in the conventional spring structure, in order to make it easier to bend, the connected state of the end faces of the adjacent coil springs by the helical wire is released. When the spring structure that has been released is bent or extended, the end faces of adjacent coil springs may collide with each other and generate noise.

The present invention has been made based on the above circumstances, and an object thereof is to release the connected state of the end faces of the adjacent coil springs to facilitate bending, and to bend or extend the coil springs. The purpose of the present invention is to provide a spring structure in which end faces of adjacent coil springs do not collide with each other.

[0012]

In order to solve the above-mentioned problems, the invention described in claim 1 is to arrange a large number of coil springs having end face portions at both ends of a spring portion in a rectangular shape, and to arrange adjacent coil springs. A spring structure formed by connecting the end faces of the spring structure with a connecting member, and the state in which the spring structure is connected in the longitudinal direction by the connecting member at one end face of the coil spring at a midway portion in the longitudinal direction of the spring structure. Is formed, and a cushioning member having a cushioning portion that is inserted between the end faces of the coil spring that has been released is provided on one end face side of the coil spring.

According to the second aspect of the present invention, a large number of coil springs having end face portions at both ends of the spring portion are arranged in a rectangular shape, and the end face portions of adjacent coil springs are connected by a connecting member. In the spring structure, a release part is formed at a midway part of the spring structure in the longitudinal direction to release the coupling state of the spring structure by the connecting member at one end face of the coil spring. A buffer member having a buffer portion formed on one end surface portion of the coil spring between the end surface portions adjacent to each other in the longitudinal direction, and having a buffer portion on one end surface portion side of the coil spring that enters the space portion. Is provided.

According to the first aspect of the present invention, by providing the buffer member having the buffer portion which is inserted between the end surface portions in which the coupled state is released, on one end surface side where the coupled state of the coil spring is released, It is prevented that the end portions of the coil springs, which are disengaged from each other by the buffer portion, collide with each other and generate noise.

According to the second aspect of the present invention, the coupled state is released, and the gap is formed between the adjacent end surface portions of the coil spring, so that the adjacent end surface portions collide with each other and noise is less likely to occur. It becomes easy to interpose the cushioning portion of the cushioning member between the adjacent end face portions.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment of the present invention, and FIG. 6 shows a wake-up bed 1. The wake-up bed 1 includes a base 2 formed in a rectangular frame shape and having a headboard 2a at one longitudinal end and a footboard 2b at the other end. Casters 3 with stoppers for movably supporting the base body 2 are provided at four corners of the lower surface of the base body 2, and a floor plate 4 divided into a plurality in the longitudinal direction is provided on the upper surface. In this example, the floor panel 4 is divided into first to fourth four floor panel sections 4a to 4d.

2 from the headboard 2a side of the floor plate 4
The second second floor plate portion 4b is fixed to one of the two horizontal rails 5 provided in the width direction of the base body 2. A first floor plate 4a and a third floor plate 4c are provided at both ends of the floor plate 4b.
Are pivotally attached, and a fourth floor plate portion 4d is pivotally attached to the third floor plate portion 4c.

One end of a pair of arms 6 (only one of which is shown) is fixed to the pair of horizontal rails 5 at a predetermined interval in the longitudinal direction thereof. A first shaft 7 and a second shaft 8 are rotatably supported by a pair of arms 6 of each horizontal rail 5. One end of a first lever 9 is fixed to the first shaft 7 located on the side of the headboard 2a, and the second shaft 8 has a second end.
One end of the lever 11 is fixed. Each lever 9, 1
A roller 12 is rotatably provided at the other end of the roller 1.

A roller 12 provided on the first lever 9 rolls on a first slope 13 provided on the lower surface of the first floor plate portion 4a, and a roller provided on the second lever 11 is provided. The la 12 is rollingly contacted with the second slope 14 provided on the lower surface of the third floor plate portion 4c. Furthermore, a third floor is formed on the lower surface of the fourth floor board portion
One end of the lever 15 is pivotally attached. The other end of the third lever 15 is pivotally attached to the base body 2.

A drive device 16 shown by a chain line is provided on the lower surface side of the base body 2. The drive device 16 rotationally drives the first shaft 7 and the second shaft 8. When the first shaft 7 is driven in the clockwise direction indicated by the arrow, the first lever 9 interlocking with it drives the first floor plate portion 4a of the floor plate 4 in the upright direction, and the second shaft 8 moves in the arrow direction. If it is driven in the counterclockwise direction indicated by, the second lever 11 interlocked therewith drives the third floor plate portion 4c in the standing direction. This third
The fourth floor plate portion 4d is also driven in the upright direction in conjunction with the floor plate portion 4c, and is held by the third lever 15 so as to form a substantially mountain shape with the third floor plate portion 4c.

Floor plate 4 of the wake-up bed 1 having such a structure
A mattress 20 using the spring structure 21 according to the present invention is placed on the mattress 20. This mattress 20
1 includes the above spring structure 21 having a rectangular planar shape as shown in FIGS. The spring structure 21 has a rectangular shape in which a large number of coil springs 22 are arranged in a matrix. The coil spring 2
As shown in FIGS. 1 and 4, the reference numeral 2 includes a spring portion 22a, and an upper end surface portion 22b and a lower end surface portion 22c which are continuously formed at both ends of the spring portion 22a. Each of the end surface portions 22b and 22c is formed in an annular shape.

A lower end surface portion 22c of the coil spring 22 located at a midway portion in the longitudinal direction of the spline structure 21 is formed with a recess 22d in which a part of an annular shape is bent inward in the radial direction. Therefore, in the middle of the lower surface of the spring structure 21 in the longitudinal direction, as shown in FIGS. 1 and 2, a space 23 is formed between the lower end surface portions 22c adjacent to each other via the recess 22d.
Are formed.

The spring structure 21 has upper and lower end face portions 22b and 22c of adjacent coil springs 22.
Are connected by helical lines 24, respectively. The helical wire 24 is provided along the width direction of the spring structure 21, and connects the adjacent coil springs 22 in the width direction and the longitudinal direction of the spring structure 21.

In the middle part of the lower surface side of the spring structure 21, that is, in the part where the coil spring 22 having the recess 22d formed in the lower end surface part 22c is located, the spring structure 21 is formed.
A release portion 25 is formed in which the connection by the helical line 24 is released along the longitudinal direction of. This release unit 25
Prevents the tensile force from being generated on the lower surface side which is the outside of the bending when the spring structure 21, that is, the mattress 20 is bent. Therefore, the mattress 20 can be smoothly bent.

Since the lower end surface portion 22c of the coil spring 22 along the width direction of the spring structure 21 of the releasing portion 25 is connected by the helical wire 24, each coil spring 22 swings in the width direction of the spring structure 21. It has been blocked.

At both edges of the upper and lower surfaces of the spring structure 21 excluding both sides of the release portion 25, a frame wire 26, which is made of a wire material harder than the coil spring 22 and bent in a U-shape, is clipped 27. Are linked by.
The frame structure 26 reinforces the longitudinal ends of the upper and lower peripheral edges of the spring structure 21. Further, since the frame line 26 is not provided in the portion of the spring structure 21 corresponding to the release portion 25, the flexibility, that is, the flexibility of the release portion 25 is not impaired by the frame line 26.

As shown in FIG. 1, a soft or semi-rigid synthetic resin sheet, for example, on the lower surface side of the spring structure 21, that is, the portion corresponding to the releasing portion 25 on the lower end surface portion 22a side of the coil spring 22, is used. Vinyl chloride
A sheet-shaped cushioning member 31 made of a sheet is joined and held by the clip 30. In this cushioning member 31, bellows-like cushioning portions 32 are formed over substantially the entire length in the width direction of the spring structure 21, and at substantially the same intervals as the pitch of the coil springs 22 in the longitudinal direction. In this embodiment, the cushioning member 31 is divided into three pieces in the longitudinal direction of the spring structure 21 as shown in FIG. 5, but one piece may be used.

The buffer portion 32 is inserted into the void portion 23 of the release portion 25. That is, the buffer portion 32 is interposed between the lower end surface portions 22c of the coil springs 22 of the release portion 25 of the spring structure 21. Therefore, the buffer portion 32 has the lower end surface portion 22c of the coil spring 22 adjacent to each other in the longitudinal direction of the spring structure 21 of the release portion 25 whose connection state by the helical wire 24 is released.
Have directly clashed with each other.

As shown in FIG. 1, the spring structure 21 is formed.
A sheet-shaped elastic member 33 made of urethane foam or the like is joined to the upper and lower surfaces of the member through a cloth 34 such as a stretchable knit, and the elastic member 33 is covered with an outer casing 35. Thereby, the mattress 20 is configured.

According to the wake-up bed 1 using the mattress 20 thus constructed, the drive device 16 is actuated to raise the upper half of the body of the user lying on the mattress 20, and the first floor plate portion 4a. When the mattress 20 is raised, the mattress 20 on the floor plate 4 is bent from the midway portion in the longitudinal direction according to the raising.

A midway portion in the longitudinal direction of the spring structure 21 constituting the mattress 20 is formed in a releasing portion 25 in which the lower end surface portion 22c of the coil spring 22 along the longitudinal direction is uncoupled by the helical wire 24. Therefore, even if the spring structure 21 is bent by the rising of the first floor plate portion 4a, a tensile force (reaction force against the bending) is not generated on the lower surface side that is the outside of the bending. It will be bent with a light force.

The releasing portion 25 is a coil spring 22.
Since the lower end surface 22c of the coil structure 22 is disconnected from the helical wire 24, when the spring structure 21 is bent, the lower end surface parts 22c of the coil springs 22 adjacent to each other in the longitudinal direction of the spring structure 21 may collide with each other and generate noise. There is.

However, in the releasing portion 25, the buffer member 31 is joined to the space 23 between the lower end surface portions 22c with the buffer portion 32 interposed. Therefore, the buffer 32
Since the adjacent lower end surface portions 22c are prevented from directly colliding with each other, noise can be prevented from being generated when the spring structure 21 is bent.

Moreover, since the buffer portion 32 is formed in a bellows shape, when the spring structure 21 is bent, it expands in accordance with the bending. This also prevents the bending of the spring structure 21. There is nothing.

FIG. 7 shows a second embodiment of the present invention.
In this embodiment, a non-woven fabric, vinyl leather, polypropylene sheet, acrylic sheet, cloth or the like is used as the cushioning member 41, and the cushioning member 41 is loosened to form a cushioning portion 42, and the cushioning portion 42 is a coil spring. It is inserted in the space 23 between the lower end surface portions 22 c of the 22. In addition,
The cushioning member 41 is held on the lower surface of the spring structure 21 by the clip 30 as in the first embodiment.

Even with such a cushioning member 41, it is possible to obtain the same effect as that of the first embodiment.
FIG. 8 shows a third embodiment of the present invention. The cushioning member 51 of this embodiment is formed of a thin sheet-shaped urethane foam, and the cushioning portion 52 is also formed of a belt-shaped sheet of urethane foam. The cushioning portion 52 is vertically fixed to the upper surface of the cushioning member 51, and is inserted into the space 23 between the lower end surface portions 22c of the coil springs 22.

Although the cushioning portion 52 is fixedly adhered to the cushioning member 51, they may be integrally molded. The present invention is not limited to the above-described embodiments, and can be variously modified without departing from the scope of the invention. For example, in the above-described embodiment, by forming a recess in the lower end surface of the coil spring, a void is formed between adjacent lower end surfaces, and the cushioning portion of the cushioning member is inserted therein, but without forming the recess, If the cushioning member is formed of a thin sheet, it is possible to insert the cushioning portion of the cushioning member between the lower end surface portions of the adjacent coil springs.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. That is, the fourth embodiment is a modification of the spring structure 21A. The spring structure 21A of this embodiment is the first
It is composed of a coil spring 61 and a second col spring 62. The first coil spring 61 has end face portions 61b formed above and below a coil portion (not shown),
The second coil spring 62 has a lower end surface portion 62c formed at the lower end of the coil portion 62a having a smaller diameter than the upper end surface portion 62b, as shown in FIGS. 11 and 12. It is a different diameter coil spring formed.

The spring structure 21A has a first spring portion 63 in which the first coil springs 61 are arranged in a matrix, and a second spring in which the second coil springs 62 are arranged in a matrix. The parts 64 are alternately arranged in the longitudinal direction. In other words, in this embodiment, the first spring portions 63 are arranged at both longitudinal end portions and the central portion of the spring structure 21A, and the second spring portions 64 are arranged at two midway portions in the longitudinal direction. Become.

A frame wire 26a formed by bending a steel wire into a U-shape is connected by clips 27 to the upper and lower peripheral edges of the pair of first spring parts 63 located at both ends of the spring structure 21A. The three sides of the first spring portion 63 located in the center except for one side on the lower surface side are U-shaped frame lines 26.
a is connected by a clip 27, and linear frame lines 26b are connected by a clip 27 on both sides of the upper surface.

In the first spring portion 63, the upper and lower end surface portions 61b and 61c adjacent to each other in the longitudinal direction of the spring structure 21A of the first coil spring 61 have the helical wire 2.
Connected by four.

The upper surface of the second spring portion 64 is connected to the upper end surface portion 62b of the second coil spring 62 adjacent to each other in the longitudinal direction of the spring structure 21A by the helical wire 24, and the lower surface side of the spring structure 21A. A release portion 25A is formed in which the connection by the helical line 24 along the longitudinal direction is released. That is,
In the releasing portion 25A, the lower end surface portion 62c of the second coil spring 62 is connected to the helical line 24 only along the width direction of the spring structure 21A.

Further, since the lower end surface portion 62c of the second coil spring 62 is formed on the lower surface side of the second spring portion 64 so as to have a smaller diameter than the upper end surface portion 62b, there is a space between the adjacent lower end surface portions 62c. 23A is formed.

The spring structure 21A having the above structure
As shown in FIG. 13 and FIG. 14, a single cushioning member 31 having a cushioning portion 32 for entering the space 23A is joined to the lower surface side thereof.

According to the mattress 20A shown in FIG. 14, which is constructed by using the spring structure 21A having the above construction,
Similar to the mattress 20 of the first embodiment, since the release portion 25A is formed in the spring structure 21A, it can be bent with a light force, and the buffer portion 32 of the buffer member 31 can be inserted into the void portion 23A. Therefore, even if the spring structure 21A is bent or extended, the lower end surface portion 62c of the second coil spring 62 at that portion is prevented from colliding with each other, and noise is not generated.

Further, the lower end surface portion 62c of the second coil spring 62 has a smaller diameter than the upper end surface portion 62b, and the void portion 23A is formed between the adjacent lower end surface portions 62c.
Since it becomes easy to insert the buffer portion 32 of the buffer member 31,
Workability during assembly can be improved.

FIG. 15 shows a fifth embodiment of the present invention. This embodiment is a modification of the fourth embodiment. That is, the lower end surface portion 62c of the second coil spring 62 of the second spring portion 64 is connected by the straight hard steel wire 71 instead of the helical wire 24. The hard steel wire 71
Is provided along the width direction of the spring structure 21A, and is connected to the lower end surface portion 62c of the second coil spring 62 along the width direction by a clip 72.

The lower end surface portion 6 of the second coil spring 62
By connecting 2c with hard steel wire 71, each coil spring 6
2 can be prevented from swinging in the width direction of the spring structure 21A.

FIG. 16 shows a sixth embodiment of the present invention, which is a modification of the second coil spring 162 forming the second spring portion 64. The coil spring 162 includes a coil portion 162a, a circular upper end surface portion 162b, and an elliptical lower end surface portion 162c. The lower end surface portion 162c is arranged with the minor axis direction of the elliptical shape along the longitudinal direction of the spring structure 21A.

As a result, in the second spring portion 64, the void portion 23A is formed between the lower end surface portions 162c adjacent to each other along the longitudinal direction of the spring structure 12A.

FIG. 17 shows a sixth embodiment of the present invention. This embodiment is the same as the first embodiment, but the coil springs 22 adjacent to each other along the longitudinal direction of the spring structure 21.
Of the lower end surface portion 22c in the width direction of the releasing portion 25 in which the lower end surface portion 22c has been disconnected.
Instead of this, the hard steel wire 81 and the hard steel wire 81 are connected to the lower end surface portion 22c by the clip 82.

FIG. 18 shows a seventh embodiment of the present invention. In this embodiment, instead of the hard steel wire 81 of the sixth embodiment, a resin bar 83 is used. The bar 83 has a substantially U-shaped cross section, and the lower end surface 2
It is provided by elastically engaging with 2c. In other words, the bar 83 need only be elastically attached to the lower end surface 22c, so that the attachment thereof is easy.

FIG. 19 shows an eighth embodiment of the present invention. This embodiment is a modification of the second embodiment shown in FIG. 7, and the buffer portion 42 </ b> A formed in the buffer member 41 and inserted into the gap 23 is provided with the upper end surface portion 22 b of the coil spring 22.
And the upper end surface portion 22b is connected by a clip or the like (not shown).

[0054]

As described above, according to the first and second aspects of the present invention, one end face portion of the coil spring at the midway portion in the longitudinal direction of the spring structure is released from the coupled state to form a release portion. The one end face side is provided with a cushioning member having a cushioning part that is inserted between the end faces that have been disconnected.

Therefore, according to the spring structure having such a structure, the releasing part can surely bend the spring structure with a light force, and the buffering part ensures that the adjoining coil springs are connected to each other. Since the released end faces are prevented from colliding with each other, noise is not generated even when the connected state is released.

Further, according to the second aspect of the present invention, the gap portion is formed between the adjacent lower end surface portions of the coil springs, and the cushioning portion of the cushioning member is inserted therein. Therefore, when there is no gap portion, In comparison, the lower end surface portions of the adjacent coil springs are less likely to collide with each other, and the buffer portion of the cushioning member inserted between the lower end surface portions of the coil springs is less likely to be compressed by the lower end surface portions. It has the advantage that it can be maintained.

[Brief description of drawings]

FIG. 1 is a side view showing a part of a spring structure according to an embodiment of the present invention.

FIG. 2 is a plan view showing a part of the lower surface side of the spring structure.

FIG. 3 is a plan view showing the upper surface side of the spring structure.

FIG. 4 is a perspective view of a coil spring of the same.

FIG. 5 is a plan view showing a state where a buffer member is joined to the lower surface side of the spring structure.

FIG. 6 is a side view of the same wake-up bed.

FIG. 7 is a side view showing a part of a spring structure showing a second embodiment of the present invention.

FIG. 8 is a side view showing a part of a spring structure showing a third embodiment of the present invention.

FIG. 9 is a plan view of the lower surface side of the spring structure according to the fourth embodiment of the present invention.

FIG. 10 is a plan view of the upper surface side of the spring structure.

FIG. 11 is an enlarged view of a part of the lower surface side of the spring structure.

FIG. 12 is a perspective view of a coil spring of the same.

FIG. 13 is a plan view of the lower surface side of the spring structure to which the cushioning material is also joined.

FIG. 14 is an enlarged sectional view of a portion of the mattress.

FIG. 15 is a plan view of the lower surface side of the spring structure showing the fifth embodiment of the present invention.

FIG. 16 is a perspective view of a coil spring showing a sixth embodiment of the present invention.

FIG. 17 is an enlarged plan view of a part of a spring structure showing a seventh embodiment of the present invention.

FIG. 18 is an enlarged plan view of a part of the spring structure according to the eighth embodiment of the present invention.

FIG. 19 is an enlarged plan view of a part of a spring structure showing a ninth embodiment of the present invention.

[Explanation of symbols]

22 ... Coil spring, 22a ... Spring part, 22b, 22c ... End face part, 24 ... Helical wire (connecting member), 25 ... Release part,
31 ... Buffer member, 32 ... Buffer part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuo Kamata 1148 Nakagami-cho, Akishima-shi, Tokyo Inside France Bed Co., Ltd. Tokyo factory

Claims (2)

[Claims] 1. A spring structure in which a large number of coil springs having end faces at both ends of a spring part are arranged in a rectangular shape, and end faces of adjacent coil springs are connected by a connecting member. In the middle portion in the longitudinal direction, a releasing portion is formed which releases the longitudinally connected state of the spring structure by the connecting member at one end surface portion of the coil spring, and one end surface portion side of the coil spring is provided. A spring structure, comprising a cushioning member having a cushioning portion that is inserted between the end faces that are released from the coupled state. 2. A spring structure formed by arranging a number of coil springs having end faces at both ends of a spring part in a rectangular shape and connecting end faces of adjacent coil springs with a connecting member. In the middle portion in the longitudinal direction, a releasing portion is formed by releasing the coupling state in the longitudinal direction of the spring structure by the connecting member at one end surface portion of the coil spring, and the releasing portion is provided at one end surface portion of the coil spring. Is characterized in that a void portion is formed between the end face portions adjacent to each other in the longitudinal direction, and a buffer member having a buffer portion that enters the void portion is provided on one end face portion side of the coil spring. Spring structure to be used.