JPH0449960Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spring structure for a vehicle seat or the like.

(Prior Art) Conventionally, zigzag springs B running in the front and back direction are arranged side by side at a predetermined interval in the left and right direction in a substantially rectangular skeleton frame A provided in a seat, and at the rear of the group of springs B, A frame line E consisting of a front frame, a rear frame, and left and right frames G formed by bending steel wire is overlapped and fixed, and the frame line E is connected by a connecting tube D at an intermediate position between the left and right frames, and It is known that a cushion material is provided on the upper surface of a spring body F consisting of a zigzag spring B and the frame line E, and the outer peripheral surface of the cushion material is covered with a skin.

(Problems to be Solved by the Invention) When the connecting tube D is used by cutting a hollow pipe, the inner diameter is deformed due to distortion of the cut.
Therefore, by using a rolled metal plate, this defect can be overcome.

However, when a metal plate is machined into a cylinder, there are seams, so if it is mass-produced, it is expected that the seams will shift and the cut surface and the loop portion H of the zigzag spring B will overlap. Then, due to the sliding contact, scratches may occur on the surface of the zigzag spring B, which may significantly reduce the durability of the zigzag spring B.

As a countermeasure, shorten the connecting tube D itself,
And the connecting tube D is placed in a position where it does not overlap with the zigzag spring B.
It may be possible to position the
In order to connect the separated ends C and C of the frame line E,
Since a certain length is required, the connecting tube D cannot be made shorter than the pitch of the zigzag spring B (the length between the torque bars).

Further, when a portion of the zigzag spring B overlaps with the connecting tube D, the zigzag spring B comes into sliding contact with the connecting tube D in a tilted state corresponding to the thickness of the connecting tube D, which causes a problem of generating abnormal noise.

Therefore, the present application improves the spring structure consisting of the connecting tube, the zigzag spring, and the frame line so that the connecting tube and the zigzag spring do not come into contact with each other.

(Means for Solving the Problem) Therefore, the present invention has several zigzag springs 6 arranged in the front-rear direction at a predetermined interval in the left-right direction in a substantially rectangular skeleton frame 2 provided in the seat 1. At the rear of the 6 groups of springs, there are a front frame 8, a rear frame 9, a left frame 10, and a right frame 1 formed by bending steel wire.
The frame line 7 consisting of 1 is overlapped and fixed, and the frame line 7
is connected by a connecting tube 28 at an intermediate position of the left frame 10 or the right frame 11, and in the spring structure consisting of the zigzag spring 6 and the frame line 7, the connecting tube 28 is formed by winding a metal plate, The middle part of the connecting tube 28 has a concave part 2 in a square shape.
9, and the overlapping portion of the zigzag spring 6 and the connecting tube 28 is such that the zigzag spring 6 is connected to the recess 2.
The spring structure is such that the zigzag spring 6 and the connecting cylinder 28 are located on the top of the spring 9 so that they do not come into direct contact with each other, such as a vehicle seat.

(Example) An example of the present invention will be described with reference to the drawings.
1 is a seat for a vehicle, in which a spring body 3 is attached to a skeleton frame 2, a cushion material 4 is placed on the upper surface of the spring body 3, and an outer peripheral surface of the cushion material 4 is covered with a skin 5.

As shown in FIG. 3, the spring body 3 includes a plurality of longitudinally long zigzag springs 6 arranged side by side on the left and right sides at a predetermined interval, and a substantially rectangular shape in which the rear portions of the zigzag springs 6 are overlapped. It consists of a frame line 7 (Figures 1 and 4).

The frame line 7 includes a front frame 8, a rear frame 9, and a left frame 10.
The right frame 11 is bent into a substantially rectangular shape.

On both left and right sides of the front frame 8, front locking parts 12, 12 are formed by bending the front frame 8 inward in a V shape. The ends of the front locking parts 12, 12 are connected to the left and right frames 10, 11 by connecting parts 13, 13 parallel to the front and rear frames 8, 9.
Connect to. Front locking part 12 and connecting part 13,1
3 is approximately N-type as a whole.

Similarly, on both left and right sides of the rear frame 9, rear locking portions 14, 14 are formed by bending the rear frame 9 inward in a V shape. The ends of the rear locking parts 14, 14 are connected to the left and right frames 10, 11 by connecting parts 15, 15 parallel to the front and rear frames 8, 9. The rear locking portion 14 and the connecting portions 15, 15 are approximately N-shaped as a whole.

The connecting portions 13, 13, 15, 15 of the frame line 7 are overlapped with the torque bar portion 16 of the zigzag spring 6 and locked with each other. At this time, the front locking portions 12, 12, 14, 14 are positioned at the center of each inner loop portion 17 of the zigzag spring 6.
Furthermore, the left frame 10 and right frame 11 of the frame line 7 are
It is arranged so that it is on the lower surface side of the outer zigzag springs 6 groups, and at a position below the center line l of the zigzag springs 6 and the outer end thereof.

That is, it is outside the center line l connecting the center portions 25 of the respective torque bar portions 16 of the outer zigzag spring 6, and at least the apex portion 26 of the loop portion 17 as shown in FIGS. 10 and 11. It should be located below and closer to the center than the medial line T.

The frame line 7 is connected at the middle of the left frame 10 or the right frame 11. Separated ends 27, 27 of frame line 7
The connecting tube 28 connects the metal plate 30 to the mold 3.
1 and 31 by sheet metal press processing.
After inserting the separated ends 27, 27 into the connecting tube 28, the intermediate portion is recessed downward to form a square-shaped recess 29.
is formed so that the torque bar portion 16 of the zigzag spring 6 is located on the recess 29, so that the zigzag spring 6 and the connecting tube 28 do not come into contact with each other.

Mold-shaped bent portions 18, 18 are formed at the intermediate portions of the front frame 8 and rear frame 9, and the bent portions 18, 18
The overlapping portions of the zigzag spring 6 and the zigzag spring 6 are respectively fixed with fasteners.

Therefore, a window hole 20 larger than the frame line 7 is formed below the frame line 7 of the bottom plate 19 of the skeleton frame 2, and the left and right sides of the inner peripheral edge of the window hole 20 are provided with mounting holes. A portion 22 is formed. The upper surface of the attachment part 22 is lower than the upper surface of the outer peripheral edge part 21 of the skeleton frame 2.

The zigzag spring 6 is attached with its front end to the skeleton frame 2 so that the rear end of the spring body 3 is located above the outer peripheral edge 21 of the skeleton frame 2 (FIG. 4), and then The rear end of the spring body 3 is locked by the coil spring 23 against the upwardly moving spring elasticity so that the frame line 7 is located at the upper surface of the mounting portion 22 (FIG. 6).

The coil spring 23 has one end locked to the upper surface of the mounting part 22, and the other end to each locking part 12 of the frame line 7,
14.

The coil spring 23 is positioned in a space 24 formed at each corner of the frame line 7, and has one end locked to the upper surface of the mounting rib 22, and the other end locked to each locking part of the frame line 7. 12 and 14. That is,
When the coil spring 23 supports the same load, if the length is increased, the coil spring 2
Not only can the winding diameter of 3 be made smaller,
It produces high flexibility and elasticity, which improves cushioning properties. Therefore, the coil spring 23 is positioned in a space 24 formed at each corner of the frame line 7, and is made to protrude relatively toward the center from the left and right frames 10, 11. It is locked in each locking part 12,14.

(effect) Next, we will discuss the effect.

When the user is seated on the seat 1 and the spring body 3 is lowered by a load, the frame line 7 portion at the rear end of the spring body 3 moves up and down within the window hole 20 of the bottom plate 19 of the skeleton frame 2. Similarly, the fixing coil spring 23 at the frame line 7 portion moves up and down within the window hole 20 in the bottom plate 19 of the skeleton frame 2.

Therefore, it moves up and down smoothly and has a good cushioning effect.

Therefore, the left frame 10 and the right frame 1 of the frame line 7
Position 1 is on the lower surface side of the zigzag spring 6 located on the outer side of the 6 groups of zigzag springs, and is located at a lower position midway between the left-right center line l and the outer end of the zigzag spring 6. When seated, the zigzag spring 6 tries to rotate, but the left and right frames 10 and 11 come into contact with the lower surface of the zigzag spring 6 and prevent it from rotating, thereby preventing the zigzag spring 6 from swinging.

Therefore, since the load of the seat 1 is supported by the "plane", the support balance of the spring body 3 is improved, and the cushioning effect is improved.

Furthermore, since the left and right frames 10 and 11 of the frame line 7 are located below the inner line T of the apex portion 26 of the loop portion 17 toward the center, the loop portion 17 is located below the left and right frames 10 and 11. This prevents them from getting into the room and causing abnormal noises.

In this case, the connecting tube 28 of the right frame 11 of the frame line 7
After insertion, the separated ends 27, 27 are bent from above to form a square shape to form a recess 29, and the torque bar portion 16 of the zigzag spring 6 is placed on the recess 29.
is positioned so that the zigzag spring 6 and the connecting tube 28 do not come into contact with each other, so even if the connecting tube 28 is installed with the joint located upward, the lower surface of the zigzag spring 6 will not come into sliding contact with the connecting tube 28. This prevents damage to the surface of the zigzag spring 6, improves the durability of the zigzag spring 6, and prevents the generation of abnormal noise.

(Effects) In the present invention, several zigzag springs 6 are arranged in parallel in the front-rear direction at a predetermined interval in the left-right direction in a substantially rectangular skeleton frame 2 provided in the seat 1, and each group of the springs 6 is arranged in parallel. At the rear part, a frame line 7 consisting of a front frame 8, a rear frame 9, a left frame 10, and a right frame 11 formed by bending steel wire is overlaid and fixed, and the frame line 7 is fixed to the left frame 10 or the right frame. In the case of a spring structure in which a connection is formed by a connecting tube 28 at an intermediate position of the frame 11, and the zigzag spring 6 and the frame line 7 are formed, the connecting tube 28 is formed by winding a metal plate, and the connecting tube 28 is formed by winding a metal plate. A concave portion 29 is formed in a square shape, and the overlapping portion of the zigzag spring 6 and the connecting tube 28 is such that the zigzag spring 6 is located on the concave portion 29 and the zigzag spring 6 and the connecting tube 28 do not come into direct contact with each other. Since the vehicle seat or the like has a spring structure, it is always assembled so that the square-shaped recess 29 is at the bottom during the assembly process. Therefore, the zigzag spring 6 is located on the recess 29. Therefore, since the zigzag spring 6 and the connecting tube 28 do not come into contact with each other, the surface of the zigzag spring 6 is not damaged, the durability of the zigzag spring 6 is improved, and the generation of abnormal noise can be prevented.

[Brief explanation of the drawing]

Figure 1 is a plan view of the skeleton frame, Figure 2 is a perspective view of the skeleton frame, Figure 3 is a perspective view of the spring body in its assembled state, Figures 4 and 5 are perspective views of the spring body in its attached state, Figure 6 is a vertical front view, Figure 7 is a seated state diagram, Figure 8 is a plan view, Figure 9 is an operating state diagram, and Figure 1
Figure 0 is an enlarged view of the main part, Figure 11 is a sectional view of Figure 10, Figures 12 and 13 are diagrams of the processing state of the connecting tube,
14 to 16 are installation state diagrams, FIG. 17 is a sectional view of a main part, and FIGS. 18 to 20 are views of known examples. Explanation of symbols, 1...Seat sheet, 2...Skeleton frame, 3...Spring body, 4...Cushion material, 5
... Skin, 6 ... Zigzag spring, 7 ... Frame line, 8
...Front frame, 9...Rear frame, 10...Left frame, 11...
Right frame, 12... Front locking part, 13... Connection part, 1
4... Rear locking part, 15... Connection part, 16... Torque bar part, 17... Loop part, 18... Bent part, 19... Bottom plate, 20... Window hole, 21... Side plate, 22 ... Mounting part, 23 ... Coil spring, 24
...Space part, 25...Central part, 26...Vertex part,
27... Separated end portion, 28... Connection tube, 29...
Recessed portion, 30...Metal plate, 31...Mold, l...Center line, T...Inside line.

Claims (1)

[Scope of utility model registration request] Several zigzag springs 6 are arranged in parallel in the front-rear direction at predetermined intervals in the left-right direction in a substantially rectangular skeleton frame 2 provided in the seat 1, and a steel wire is attached to the rear of the group of 6 springs. A frame line 7 consisting of a front frame 8, a rear frame 9, a left frame 10, and a right frame 11 formed by bending
are superimposed and fixed, and the frame line 7 is connected to the left frame 10 or the right frame 11 by a connecting tube 28 at an intermediate position, and the zigzag spring 6 and the frame line 7 are
In the spring structure consisting of
Reference numeral 8 is formed by winding a metal plate, and the middle part of the connecting cylinder 28 forms a concave part 29 which is recessed in a square shape. This is a spring structure for a vehicle seat, etc., in which the zigzag spring 6 and the connecting tube 28 are located at the top so that they do not come into direct contact with each other.