JP2002262958A - Attaching hook or assemble spring for seat cushion to frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hook which smoothly touches on an S-spring and a frame of a seat cushion, generates no noise even when body weight is loaded on an assemble spring, generates no errosion and rust, can be securely engaged with the frame, is excellent in rigidity and durability, and can be simply and easily attached. SOLUTION: The hook body 12 of this hook 11 is made by laying a cylinder made of synthetic resin and cutting off the bottom part along the axis line to provide a gap part 15. An engaging part for end parts of the S-spring such as a nail part 13 is equipped along the outside of an edge 12a which is one side of the gap part 15. A projection part 14 insertable into a hole of the frame is equipped on the inner face of the hook body 12 to complete the hook 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook for attaching an assembled spring to a frame of a cushion of a chair, a car seat, a bed or the like (hereinafter referred to as a seat or the like).

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a plurality of S-shaped springs 1 made of steel wire are arranged in parallel with a cushion 2 for a seat or the like, and a midline 2 is arranged at a right angle thereto. And Nakazari 2
To form a group spring 3, and the group spring 3 is locked to a steel frame 4 by a double hook 5 made of a steel wire.

As shown in FIG. 8, a double hook 5 is formed by bending both sides of a central portion 6 of a steel wire in the same direction and at right angles to form bent portions 7 and 7 Part 8,
8, and the ends thereof are bent to form hooks 9, 9.

The double hook 5 locks the spring assembly 3 to the frame 4 as shown in FIG. That is,
The frame 4 has two hook portions 9 of a double hook 5,
Two holes 10, 10 into which the tip of the hook 9 can be inserted are provided at intervals slightly smaller than the interval of 9, and the end 1 a of the S-shaped spring 1 is connected to the curved portions 7, 7 of the double hook 5. The hooks 9 and 9 are pushed in with fingers and the distance between them is reduced by inserting a finger, and the tips of the hooks 9 and 9 are inserted into the holes 10 and 10 in accordance with the distance between the two holes 10 and 10 of the frame 4. When the finger is released, a force is exerted on the hook portions 9, 9 to elastically expand to the original distance, and the S-shaped spring 1 and the frame 4 are strongly engaged.

[0005]

Since the conventional double hook is made of steel wire, if a weight is applied to the assembled spring, a locking contact between the metal frame and the end of the S-shaped spring made of steel wire is made. Due to the friction in, sound is heard and harsh. Further, they are easily worn due to friction, corrode or rust, and have a problem in durability. Furthermore, since the hook between the double hook and the frame is merely inserted into the hole of the double hook steel wire in the hole of the frame, the hook portion is worn due to friction between the edge of the hole and the steel wire. It is easy to be damaged, the engagement between the frame and the S-shaped spring is easily damaged, and there is a problem in durability. To lock the double hook to the frame, the distance between the two hooks must be reduced with the fingertip, and a force is required for the fingertip.

According to the present invention, the contact between the S-shaped spring and the frame is smooth, no noise is produced even when the weight is applied to the assembled spring, no corrosion or rust is generated, the engagement with the frame is reliable and firm. It is an object of the present invention to provide a hook which has excellent durability, is easy to attach to a frame, and is easy.

[0007]

SUMMARY OF THE INVENTION A plastic cylinder having a diameter equal to the diameter of a frame of a cushion such as a seat is laid down, and the lower side is cut along an axis along a width smaller than the diameter. The main body provided with the space portion according to the above, provided at one edge of the space portion is provided with a locking portion of the end of the S spring of the set spring of a cushion such as a seat, and a hole provided in the frame on the inner surface of the body. A hook is formed by providing a protrusion that can be inserted or fitted into the hook, and both ends of the S spring are individually locked to the respective locking portions of the two hooks, and the interval between the main bodies of the hooks is fixed to the frame. It is possible to push the hook in opposition, fit the frame into the hook body, insert or fit the protrusion into the hole of the frame, and stretch the S-spring to the frame.

[0008] The hook portion of the hook body has a claw portion which is continuous with one edge of the interval portion of the main body and rises along the outer surface of the main body. It is assumed that an indented part into which the part can be inserted is formed.

Alternatively, the engaging portion of the hook main body is continuous with one edge of the interval portion of the main body, rises along the outer surface of the main body, the tip portion is bent outward, and the S-spring is formed on the inner surface of the bent portion. Is made of steel that can be engaged by fitting the ends of the steel.

Alternatively, the engaging portion of the hook main body is provided with a projection parallel to the edge of the interval on one outer surface of one edge of the interval of the main body, and a through hole parallel to the edge is formed in the projection. Provided,
It is made of steel that allows the end of the S spring to be inserted into the through hole.

The projection on the inner surface of the main body is provided at a position where the length of the arc between the spacing portion of the main body and the edge on the side where the locking portion is provided is shorter than the length of the arc between the other edge and the other edge. , Preferably project in the axial direction of the body.

[0012]

Embodiments of the present invention will be described with reference to the drawings. A plurality of S-shaped springs 1 made of a steel wire or a plastic wire are made parallel to form one or a plurality of intermediate springs 2 to form an assembled spring 3.

A hook 1 for attaching the set spring 3 to the frame 4
Reference numeral 1 is made of plastic, and a main body 12 for holding the frame 4, a claw portion 13 for locking an end of the S-shaped spring 1, and a locking portion provided on an inner surface of the main body 12 inserted into a hole of the frame 4. The projection 14 is formed.

The main body 12 has a shape in which the cylindrical body is laid down and the lower part is cut along the axis, that is, parallel to the axis, and the C provided with the gap 15 is turned downward. A piercing portion 1 which is continuous with one edge portion and can be turned upside down (in the figure) to hold the end of the S-shaped spring 1 as shown in FIG.
6 is formed. One or two protrusions 14 are provided on the inner surface of the main body 12. It is preferable that the protruding portion 14 is slightly offset from the line passing through the center of the interval portion 15 at right angles to the claw portion 13 and protrudes in the central axis direction of the main body. That is, as shown in FIG. 3, at the edge of the interval portion 15 of the main body 12, the length of the arc between the claw-side edge 12 a and the protrusion 14 is equal to the length of the edge 12 b facing the edge 12 a and the protrusion 14. Is preferably shorter than the length of the arc between the two.

The width of the gap 15 is slightly smaller than the diameter of the frame 4. When the main body 12 is pressed against the frame 4, the gap expands due to the elasticity of the main body 12, and the frame 4 is fitted into the main body 12, and again with the elasticity. The interval returns, and the main body 12 holds the frame 4.

The frame 4 is provided with a hole (not shown) into which the projection 14 of the hook 11 can be inserted or fitted.

The hook 11 is used as follows. That is, both ends of the S spring 1 of the paired spring 3 are inserted into the respective indentations 16 of the two hooks 11, and first, the gap 15 of one hook 11 is opposed to the frame 4, and then the hook 11 is connected to the frame 4. When pressed against 4, frame 4
Are fitted into the main body 12 and the hook 11 is slightly slid so that the projection 14 faces the hole of the frame 4.
When 1 is pressed, the protrusion 14 is inserted or fitted into the hole of the frame 4, and the main body 12 of the hook 11 holds and fixes the frame 4.

Next, the hook 11 holding the end of the other S-spring 1 is slightly pulled, so that the S-spring 1 is slightly extended, so that the gap 15 of the main body 12 of the hook 11 is first moved. When the main body 12 is pressed against the frame 4 so as to face the opposite side of the frame 4 on which the frame 14 is mounted, the frame 4 fits into the main body 12 and the protrusions 14 are formed in the same manner as described above.
Is inserted or fitted into the hole of the frame 4. Hook 11
The main body 12 holds and fixes the frame 4. S spring 1
S spring 1 pulls two hooks 11 slightly, so that S spring 1 is firmly and elastically supported by frame 4 via hook 11.

Next, the plurality of S-springs 1 of the assembled spring 3 are sequentially locked to the frame 4 via the hooks 11 in the above-described procedure to form a cushion such as a seat.

FIG. 5 shows another embodiment of the hook for attaching the assembled spring. The configuration of the main body of the hook 11a is the same as that of the main body 12 of the hook of the previous embodiment, and a protrusion 14 is similarly provided on the inner surface of the main body 12. The indented portion 16 formed by the claw portion 13 of the locking portion at the end of the S spring 1 is opened upward by the claw portion 13 being inverted, but in the hook 11a,
The claw portion 13a is bent downward from above, and the indented portion 16a is on the inner surface of the bend and is opened downward.

The use of the hook 11a is based on the S
Each of the two ends of the spring 1 is inserted into the indentation 16a of each of the two hooks 11a, and thereafter, the plurality of S springs 1 of the assembled spring 3 are sequentially passed through the hooks 11a in the same manner as described above for the hook 11. To the frame 4
Construct a cushion for a seat or the like.

FIG. 6 shows another embodiment of the hook for attaching the assembled spring. The configuration of the main body of the hook 11b is the same as that of the hook main body 12 of the previous embodiment, and a protrusion 14 is similarly provided on the inner surface of the main body 12. Instead of the claw 13 of the end locking portion of the S spring 1, the long protrusion 13 is provided at the same position as the claw 13 on the outer surface of the main body 12 along the central axis of the main body 12, that is, in parallel.
b, and a through hole 16b parallel to the edge 12a is provided in the protrusion 13b. The diameter of the through hole 16b is set to a size that allows the end of the S spring 1 to be inserted.

The use of the hook 11b is also equivalent to the S
Each of both ends of the spring 1 is inserted into the through hole 16b of each of the two hooks 11b, and thereafter, a plurality of S
The springs 1 are sequentially locked to the frame 4 via the hooks 11b to form a cushion such as a seat.

The position of the protrusion 14 of the main body 12 of each of the hooks is, as in the case of the protrusion 14a shown in FIG.
a may be equal to the length of the arc between 12b and the protrusion 14a, but if this length is equal,
When a load (weight) is applied to the S spring 1, a force is applied to the main body in the direction of the claw 13, and the main body tends to rotate in the direction of the claw 13.
May be removed from

Therefore, as shown in FIG. 3, the length of the arc between 12b and the protrusion 14 is made longer than the length of the arc between 12a and the protrusion 14. That is, the position of the protrusion 14 is slightly shifted toward the claws 13, 13a and the protrusion 13b. Then, the protrusion 14 is turned in the axial direction.

With this configuration, a load is applied to the assembled spring 3, and the locking portion of the S spring end of the main body 12, that is, the claw portion 1
Even if a force is applied to rotate in the direction of 3, 13a or the protrusion 13b, since the protrusion 14 is obliquely directed in the axial direction, a force is applied to the protrusion 14 in the axial direction, and the protrusion 14 comes off. The hook 11 does not fall off the frame.

[0027]

The hook according to the present invention is made of a synthetic resin and has a small friction coefficient because the surface contact is made with the frame and the S-spring, so that the contact portion is smooth and no sound is produced. Further, since it is made of a synthetic resin, there is no occurrence of corrosion and rust, and the coefficient of friction is small, so that the durability is excellent. Furthermore, the mounting of the cushion such as the seat on the frame can be performed by one operation by pushing, and the mounting is simple. The hook with the protrusion of the hook body shifted to the claw side does not come off even if a load is applied to the cushion assembly spring, the hook does not fall off the frame, and the engagement between the frame and the assembly spring Is strong.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cushion such as a seat.

FIG. 2 is a perspective view of a hook.

FIG. 3 is an explanatory diagram of a relationship between a hook and a frame.

FIG. 4 is an explanatory diagram showing a relationship between a hook and a frame according to another embodiment.

FIG. 5 is a perspective view of a hook according to another embodiment.

FIG. 6 is a perspective view of a hook according to another embodiment.

FIG. 7 is a perspective view of a cushion of a conventional seat or the like.

FIG. 8 is a perspective view of a hook.

FIG. 9 is a diagram illustrating the relationship between a conventional hook and a frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 S spring 2 Intermediate tension 3 Braided spring 4 Frame 5 Double hook 6 Central part 7 Curved part 8 Parallel part 9 Hook part 10 Hole 11 Hook 12 Main body 13 Claw part 14, 14a Projection part 15 Spacing part 16 Bay part

Claims (5)

[Claims] 1. A plastic cylinder having a diameter equal to the diameter of a frame of a cushion such as a seat is laid down, and a lower side is cut along an axis with a width smaller than the diameter, and a gap formed by the cut is cut. An engaging portion of an end of an S-spring of a set spring of a cushion such as a seat is provided on one edge of the spacing portion of the provided main body, and inserted or fitted into a hole provided in the frame on the inner surface of the main body. A hook provided with a protruding portion, wherein both ends of the S-spring are individually locked to respective locking portions of the two hooks, and a gap between main bodies of the hooks is opposed to the frame. Pushing a hook, fitting the frame into a hook body, inserting or fitting the protrusion into a hole in the frame, and allowing the S-spring to be stretched in the frame. Hook for mounting spring assembly . 2. The locking portion has a claw portion that is continuous with one edge of the spacing portion of the main body and rises along the outer surface of the main body, and the outer surface of the main body and the claw portion form an end of the S spring. The hook for attaching a set spring according to claim 1, wherein a piercing portion into which the insertion spring can be inserted is formed. 3. The locking portion is continuous with one edge of the interval portion of the main body, rises along the outer surface of the main body, and its tip is bent outward, and the end of the S spring is provided on the inner surface of the bent portion. The hook for attaching a set spring according to claim 1, wherein the hook can be fitted and locked. 4. The locking portion is provided with a projection parallel to an edge of the gap on one outer surface of one edge of the gap of the main body, and a through hole parallel to the edge of the projection. The hook according to claim 1, wherein an end of an S spring can be inserted into the through hole. 5. The protrusion on the inner surface of the main body is located at a position where the length of the arc between the spacing portion and the edge on the side where the locking portion is provided is shorter than the length of the arc between the other edge and the other edge. The hook for attaching a set spring according to any one of claims 1 to 4, wherein the hook protrudes in the axial direction of the main body.