JP3009348B2 - Spring structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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 portions of adjacent coil springs with helical wires.

The mattress is constructed by laminating a sheet-like elastic material on at least the upper and lower surfaces of the spring structure and covering the laminated body with a bag-like sewn cloth outer body. . On the upper and lower peripheral edges of the spring structure, a frame line formed of a hard wire is used to reduce the degree of connection of the coil spring, reinforce the coil spring in the peripheral portion, or maintain the outer shape of the mattress. It is provided.

[0004] The mattress thus constructed is used by being placed on a floor plate provided on a bed base. Beds include so-called wake-up beds that are used by people who are difficult to get up on their own, such as sick and elderly people.

[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 raised floor is driven up and down by a driving device. Therefore,
A user who lies on the floor panel via a mattress is raised in the upper body by driving the back-raising floor portion in the rising direction.

[0006] The mattress used in such a wake-up bed must have a structure that bends according to the rising of the raised floor portion of the floorboard. However, as described above, in the spring structure, adjacent end faces of the coil springs arranged in a rectangular shape are connected by a helical wire.

Therefore, when the user raises the back-raising floor in order to raise the user's upper body, a large tensile force is generated on the lower surface side in the thickness direction of the mattress spring structure bent accordingly. . Since the end faces of the coil springs adjacent to each other in the longitudinal direction are connected by a helical wire, the spring structure generates a large resistance to the tensile force. Therefore, even when the back raising floor is raised, the spring structure, that is, the mattress may not be smoothly bent.

Accordingly, the present applicant has 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 faces of the coil springs are connected by a helical wire, and the spring unit of the coil spring end face on the lower surface side of the spring unit (spring assembly) is connected to the spring unit. The connection by the helical wire 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 bent.

According to such a configuration, the mattress can be smoothly bent when the back-raising 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, the connection state of the end faces of the adjacent coil springs by the helical wire is released in order to be easily bent. When the spring structure from which the is 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 of the present invention is to release the joined state of the end faces of adjacent coil springs to facilitate bending, and to bend or extend the coil springs. It is another object of the present invention to provide a spring structure in which end faces of adjacent coil springs do not collide with each other to generate noise.

[0012]

According to the first aspect of the present invention, a spring is provided.
Numerous coil springs with end faces at both ends
And place the end faces of adjacent coil springs in a row.
In a spring structure formed by joining with a binding member,
In the middle of the spring structure in the longitudinal direction, the coil
The spring is formed by the connecting member on one end face of the spring.
Release when the coupling state along the longitudinal direction of the pulling structure is released
One end of the coil spring of this release part
On the surface, a part of the ring is bent inward in the radial direction
Forming end faces that are adjacent in the longitudinal direction.
A spring structure characterized by forming a gap between the parts.
In the body. The invention of claim 2 has end faces at both ends of the spring section.
Arrange a number of coil springs in a rectangular shape
Connect the end faces of the matching coil springs with a connecting member
In the spring structure to be formed, this spring structure
One half of the above coil spring
The length of the spring structure by the connecting member at the end face
Forming a release part in which the direction of connection has been released, and this release part
One end of the coil spring from the other end
Is also formed with a small diameter so that adjacent
A gap formed between the end faces.
In the ring structure. The invention according to claim 3 is characterized in that both ends of the spring portion are
Numerous coil springs with faces are arranged in a rectangular shape
And connect the end faces of adjacent coil springs with a connecting member.
In the spring structure formed together,
The coil spring is located in the middle of the
The spring structure by the connecting member on one end face of
Forming a release part that releases the connection state along the longitudinal direction of the body
Then, on one end face of the coil spring of this release part
Is formed by bending a part of the ring radially inward to form a recess
By doing so, between the end face portions adjacent in the longitudinal direction
A gap is formed and one of the coil springs is formed.
The other end has a gently
A spring structure characterized by the provision of an opposing member
is there. The invention according to claim 4 has end face portions at both ends of the spring portion.
Many coil springs are arranged in a rectangular shape and
It is formed by connecting the end faces of the coil spring with a connecting member.
The length of this spring structure
In the middle part in the hand direction, one end face of the above coil spring
Longitudinal direction of the spring structure by the connecting member of the portion
A release part where the connection state of the release part is released is formed, and the release part
One end face of the il spring is smaller than the other end face.
By forming them in a diameter, the ends adjacent in the longitudinal direction
A gap is formed between the surfaces, and the coil split
One end face of the ring prevents the end faces from colliding.
A spring provided with a buffer member for stopping
In the structure.

[0013]

[0014]

According to the first and second aspects of the present invention, the adjacent end faces of the coil spring, whose coupling state has been released, are formed so as to form a gap between the adjacent end faces. It is possible to prevent noise from being generated due to collision of the mating end surfaces. According to the invention of claims 3 and 4,
By providing the cushioning member on one end surface where the coupling state of the coil spring is released, the end surfaces do not directly collide with each other and generate noise.

[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 rising 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. At the four corners of the lower surface of the base 2, casters 3 with stoppers for supporting the base 2 so as to be able to travel are provided, and on the upper surface, a floor plate 4 divided into a plurality in the longitudinal direction is provided. In this example, the floor panel 4 is divided into first to fourth four floor panel sections 4a to 4d.

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

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

The roller 12 provided on the first lever 9 is in rolling contact with the first slope 13 provided on the lower surface of the first floor plate 4a, and is provided on the second lever 11. The roller 12 is in rolling contact with a second slope 14 provided on the lower surface of the third floor plate portion 4c. Further, a third surface is provided on the lower surface of the fourth floor plate portion 4d.
One end of the lever 15 is pivotally mounted. The other end of the third lever 15 is pivotally connected to the base 2.

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

The floor plate 4 of the wake-up type bed 1 having such a configuration.
A mattress 20 using the spring structure 21 according to the present invention is mounted thereon. This mattress 20
Has the above-mentioned spring structure 21 having a rectangular planar shape as shown in FIGS. The spring structure 21 has a rectangular shape in which a number of coil springs are arranged in a matrix.

The spring structure 21 includes a first coil spring 31 and a second col spring 32. The first coil spring 31 is a coil part 31
End faces 31b and 31c formed above and below a are drum-shaped coil springs having the same diameter, and the second coil spring 32 has a lower end face 32c formed at the lower end of the coil part 32a as shown in FIG. It is a coil spring of a different diameter formed smaller than 32b.

As shown in FIG. 1, a lower end surface portion 32c of the second coil spring 32 is covered with a buffer member 40 made of an elastic material such as rubber or a relatively soft synthetic resin. When covering the lower end surface portion 32c with the cushioning member 40, the lower end surface portion 32c is immersed in a molten elastic material to be adhered, or the buffer member 40 is formed in a tube shape or a cap shape in advance. The lower end portion 32
A method of providing such as fitting into c is conceivable. In this embodiment, the buffer member 40 is formed by immersing the lower end surface 32c of the second coil spring 32 in a molten elastic material.

The spring structure 21 includes a first spring portion 33 in which the first coil springs 31 are arranged in a matrix, and a second spring portion in which the second coil springs 32 are arranged in a matrix. The parts 34 are alternately arranged in the longitudinal direction. That is, in this embodiment, the first spring portion 33 is disposed at both ends and the central portion in the longitudinal direction of the spring structure 21, and the second spring portion 34 is disposed at two positions in the middle in the longitudinal direction. Become.

At the upper and lower peripheral edges of the pair of first spring portions 33 located at both ends of the spring structure 21, frame lines 26 a formed by bending steel wires in a U-shape are provided on the clips 2.
7, the three sides of the first spring portion 33 located at the center except for one side on the lower surface side have a U-shaped frame line 26a.
Are connected by clips 27, and straight frame lines 26 b are connected to the upper surface on both sides by clips 27.

The first spring portion 33 has upper and lower end surfaces 31b and 31c which are adjacent to each other in the longitudinal direction of the spring structure 21 of the first coil spring 31.
Are joined by

The upper end surface 32b of the second coil spring 32 adjacent in the longitudinal direction of the spring structure 21 is connected to the second spring portion 34 by the helical wire 24 on the upper surface side, and the spring structure 2 on the lower surface side.
A release portion 25 is formed in which the connection state along the longitudinal direction of the release portion 1 is released. That is, in the release portion 25, the lower end surface portion 32c of the second coil spring 32 is
Are connected only by the hard steel wire 35 along the width direction of. The hard steel wire 35 is connected to the lower end surface 32 c of the second coil spring 32 by the clip 27.

Further, on the lower surface side of the second spring portion 34, since the lower end surface portion 32c of the second coil spring 32 is formed smaller in diameter than the upper end surface portion 32b, a gap is formed between the adjacent lower end surface portions 32c. 23 are formed.

A sheet-like elastic material 43 made of an elastic material such as urethane foam is joined to upper and lower surfaces of the spring structure 21 via a fabric 44 such as a stretchable knit. 43 is covered with the exterior ground 45.

According to the wake-up bed 1 using the mattress 20 constructed as described above, the driving device 16 is operated to raise the upper body of the user who is lying on the mattress 20, and the first floor plate portion 4a is activated. Is raised, the mattress 20 on the floorboard 4 is bent from the middle part in the longitudinal direction in accordance with the rising.

The second spring portion 34 provided in the middle of the spring structure 21 constituting the mattress 20 in the longitudinal direction is provided with a coil spring 22 extending along the longitudinal direction.
Is formed on the release portion 25 from which the lower end surface portion 22c is released. Therefore, even if the spring structure 21 is bent by the rising of the first floor plate portion 4a, a large tensile force (reaction force against bending) does not occur on the lower surface side outside the bending, so that the spring structure 21 is not generated. Will be reliably bent with a light force.

The release portion 25 is formed by releasing the connection of the lower end surface portion 32c of the second coil spring 32 by the helical wire 24. Therefore, when the spring structure 21 is bent, the release portions 25 are adjacent to each other in the longitudinal direction of the spring structure 21. There is a possibility that the lower end surfaces 32c of the second coil springs 32 collide with each other and generate noise.

However, a cushioning member 40 is provided on the lower end surface portion 32c of the second coil spring 32 forming the second spring portion 34 in the release portion 25. Therefore, the buffer member 40 prevents the lower end surface portion 32c adjacent to the second coil spring 32 from directly colliding with each other, thereby preventing generation of noise when the spring structure 21 is bent. be able to.

Moreover, the lower end 32c of the second coil spring 32 forming the second spring portion 34 has a small diameter, and the gap 23 is formed between the adjacent lower ends 32c. Adjacent lower end 3
2c is less likely to collide, and generation of noise can be suppressed.

Further, the second coil spring 32 provided with the buffer member 40 is connected by a hard steel wire 35 in the width direction of the spring structure 21. Therefore, the second coil spring 32 is prevented from swinging in the width direction of the spring structure 21, so that the stability of the second spring portion 34 is hardly impaired.

FIGS. 7 and 8 show a second embodiment of the present invention. This embodiment is a modification of the buffer member 40A.
That is, in the first embodiment, the buffer member 40 is provided on the lower end surface 32c of each of the second coil springs 32. However, the buffer member 40A of this embodiment is made of an elastic material such as rubber or synthetic resin. And has a C-shaped cross section formed to have substantially the same length as the width dimension of. The cushioning member 40A is connected to the spring structure 2
The lower end surface portion 32c of the second coil spring 32 in one row in the width direction is elastically attached to one end in the radial direction orthogonal to the width direction.

Also in such a configuration, similarly to the first embodiment, it is possible to prevent the lower end surface portion 32c adjacent to the second coil spring 32 from colliding with the buffer member 40A to generate noise. .

FIGS. 9 and 10 show a third embodiment of the present invention. This embodiment uses a cushioning member 40A having the same configuration as that of the second embodiment, but differs in the structure of a second coil spring 32A forming a second spring portion 34A.

That is, the second coil spring 32
A is an upper end surface portion 32b provided at the upper end of the coil portion 32a and a lower end surface portion 32 provided at the lower end as shown in FIG.
c is formed in the same diameter as the first coil spring 31 except that the lower end surface portion 32c has a concave portion 32d in which a part of the annular shape is bent radially inward.
Are formed. Thereby, a gap 23A is formed between the lower end surfaces 32c adjacent to each other via the recess 32d of the second spring coil spring 32A.

The lower end surface 32c of the second coil spring 32A along the width direction of the spring structure 21 is
And the clip 27 are the same as in the first and second embodiments, and the same is the point that the connection along the longitudinal direction is released to form the release portion 25.

Therefore, according to such a configuration, the spring structure 21 can be easily bent from the second spring portion 34A by the release portion 25, and the second coil spring 32 can be bent by the buffer member 40A.
It is possible to prevent the lower end surface portions 32c adjacent to each other from colliding with each other and generating noise. Furthermore, the lower end face 3
Since the gap 23A is formed by the concave portion 32d between 2c, not only a space for providing the cushioning member 40A can be secured, but also the adjacent lower end face 32c is less likely to collide.

FIGS. 11 and 12 show a fourth embodiment of the present invention. This embodiment is almost the same as the first embodiment, except that the buffer member 40 is not provided on the lower end surface portion 32c of the second coil spring 32 forming the second spring portion 34. ing. That is, the release portion 25 and the gap 23 are formed in the second spring portion 34. The gap portion 23 is formed by making the lower end surface portion 32c of the second coil spring 32 smaller in diameter than the upper end surface portion 32b, as in the first embodiment.

The lower end surface 32c of the second coil spring 32 along the width direction of the second spring portion 34 is joined by a hard steel wire 35 attached to the lower end surface 32c by the clip 27. Therefore, the second coil spring 32 is prevented from swinging in the width direction of the second spring portion 34.

According to the above-described spring structure 21A, the gap 23 is formed between the lower end surfaces 32c of the second coil springs 32 adjacent in the longitudinal direction. For this reason, even if the spring structure 21A is bent, the lower end surface portion 32c of the second coil spring 32 adjacent in the longitudinal direction is less likely to collide with the gap portion 23, thereby generating noise. rare.

In this embodiment, although not shown, a concave portion 32d is formed in the lower end surface portion 32c of the second coil spring 32 as in the third embodiment, so that the second spring portion 34 is formed. The void 23 may be formed.

FIG. 13 shows a fifth embodiment of the present invention. This embodiment is a modification of the first embodiment. That is,
In the first embodiment, the lower end surface 32c of the second coil spring 32 of the second spring portion 34 is replaced with the upper end surface 32b.
The gap 2 has a smaller diameter than that between the adjacent lower end face portions 32c.
However, in this embodiment, the second coil spring 132 has the upper end surface 132b and the lower end surface 132c formed at the upper and lower ends of the coil portion 132a having substantially the same diameter, and the buffer member 40 is attached to the lower end surface 132c. It is provided. Accordingly, on the lower surface side of the second spring portion 34, the release portion 25 is formed, but the gap portion 23 is not formed.

According to the spring structure 21B having such a structure, the gap 2 is formed on the lower surface side of the second spring portion 34.
When the spring assembly 21B is bent, the lower end surface portion 1 of the second coil spring 132 is not formed.
32c collides. However, the lower end portion 132
Since c is covered with the cushioning member 40 made of an elastic material, even if the lower end face portion 132c collides, noise is hardly generated.

[0048]

According to the first and second aspects of the present invention,
One of the coil springs in the middle of the pulling structure in the longitudinal direction
Release the connection state of the other end face and release the connection
Between the end faces of adjacent coil springs.
To form a void. Therefore, the spring
Even if the structure is bent, the adjacent
Noise due to the end face of the
Can be suppressed. Claim 3 and claim
According to the invention of Item 4, the spring structure has a halfway portion in the longitudinal direction.
Release the one end face of the coil spring
And release the end face of the coil spring
With a shape that forms a gap between the mating end faces
, A cushioning member is provided on one end surface portion where the connection is released.
I did it. Therefore, the spring structure is bent
Also, one end face where the cushioning member was provided
Since they do not match, the generation of noise can be prevented.

[0049]

[0050]

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a part of a mattress using 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 plan view showing a lower surface side in a spring state.

FIG. 5 is a perspective view of a second coil spring before a cushioning member is provided on the lower end surface.

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

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

FIG. 8 is a side sectional view showing a part of a mattress in which the sprig structure is used.

FIG. 9 is a side sectional view showing a part of a mattress using a spring structure according to a third embodiment of the present invention.

FIG. 10 is a plan view showing a part of the same.

FIG. 11 is a plan view showing a part of a spring structure according to a fourth embodiment of the present invention.

FIG. 12 is a side sectional view showing a part of a mattress using the same spring structure.

FIG. 13 is a side sectional view showing a part of a mattress using a spring assembly according to a fifth embodiment of the present invention.

[Explanation of symbols]

Reference numeral 32 denotes a first coil spring, 33 denotes a second coil spring, 24 denotes a helical wire (connection member), 25 denotes a release portion, and 41 denotes a buffer member.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tatsuo Kamata 1148 Nakagamicho, Akishima-shi, Tokyo France Bed Co., Ltd. Tokyo factory (56) References Japanese Utility Model No. 6-77609 (JP, U) 36053 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47C 27/04 A47C 20/08 A47C 23/043

Claims (4)

(57) [Claims] A plurality of springs having end portions at both ends of a spring portion;
The coil springs are arranged in a rectangular shape.
A splice formed by joining the end faces of the ring with a connecting member
In the spring structure, the above-mentioned coil
The spring is formed by the connecting member on one end face of the spring.
Release when the coupling state along the longitudinal direction of the pulling structure is released
One end of the coil spring of this release part
On the surface, a part of the ring is bent inward in the radial direction
Forming end faces that are adjacent in the longitudinal direction.
A spring structure characterized by forming a gap between the parts.
body. 2. A large number of cores having end portions at both ends of a spring portion.
The coil springs are arranged in a rectangular shape.
A splice formed by joining the end faces of the ring with a connecting member
In the spring structure, the above-mentioned coil
The spring is formed by the connecting member on one end face of the spring.
Release part that released the coupling state in the longitudinal direction of the pulling structure
Formed and released on one end face of the coil spring
By forming a smaller diameter than the other end surface,
That a gap is formed between adjacent end faces in the direction
A spring structure characterized by the following. 3. A large number of cores having end portions at both ends of a spring portion.
The coil springs are arranged in a rectangular shape.
A splice formed by joining the end faces of the ring with a connecting member
In the spring structure, the above-mentioned coil
The spring is formed by the connecting member on one end face of the spring.
Release when the coupling state along the longitudinal direction of the pulling structure is released
One end of the coil spring of this release part
On the surface, a part of the ring is bent inward in the radial direction
Forming end faces that are adjacent in the longitudinal direction.
A gap is formed between the coil springs
Prevents the end faces from colliding with one end face
Characterized in that a spring member is provided.
Structure. 4. A large number of cores having end portions at both ends of a spring portion.
The coil springs are arranged in a rectangular shape.
A splice formed by joining the end faces of the ring with a connecting member
In the spring structure, the above-mentioned coil
The spring is formed by the connecting member on one end face of the spring.
Release part that released the coupling state in the longitudinal direction of the pulling structure
Formed and released on one end face of the coil spring
By forming a smaller diameter than the other end surface,
To form a gap between the end faces adjacent in the direction
In addition, one end face of the coil spring has an end face
Parts with cushioning members to prevent the parts from colliding with each other.
And a spring structure.