JPH0144116Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a spring device used in a pinerest.

Conventionally, the hardness of the periphery of a spring device has been reinforced in order to effectively utilize the pinerest surface all the way to the peripheral end, or to prevent the entire pinerest from losing its shape. The most practical reinforcement method is to provide a hard steel wire shaped like a hexagon or trapezoid between the upper and lower frames of the spring device. However, in this method, a large number of coil springs are arranged in parallel to form a spring unit, and a hard steel wire in a hexagonal or trapezoidal shape is provided on the vertical plane between the upper and lower frame lines provided around the periphery of the spring unit. Because the hardness appears only in the vertical direction on the side of the spring device and has a width on the peripheral surface, it is not certain that the coil spring will be harder, or the part where the hard steel wire is fixed. As the only part becomes extremely hard, it is difficult to maintain uniform hardness around the entire periphery, and furthermore, the cushioning performance of the spring device is greatly compromised.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide a spring device whose peripheral portions are uniformly hard without impairing the cushioning performance.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a spring, and a spring unit 3 is formed by arranging a large number of springs 1 and connecting them with a helical wire 2. Frame lines 4 and 5 are formed around the entire circumference of the upper and lower surfaces of the spring unit 3. The springs 1 are arranged and fixed by clips 6 to the spiral portions a and e at the upper and lower ends of the springs 1 located on the periphery of the spring unit 3. Coil springs 11 located around the spring unit 3,
21, 31... are connected by one reinforcing wire 7. This reinforcing wire 7 is a hard steel wire having a connecting portion 8 and a connecting portion 9.

The coil springs 11, 21, 31... each have an upper end spiral part a, a first intermediate spiral part b, a second intermediate spiral part c, a third intermediate spiral part d, as intermediate spiral parts.
and a lower end spiral part e, and upper and lower end spiral parts a,
A frame line 4 made of hard steel wire is fixed to the frame e with a clip 6, and reinforcing wires 7 are fixed to the intermediate spiral portions b, c, and d with clips 10.

Next, each coil spring 1 with reinforcing wire 7
1, 21, 31... will be explained based on FIG.

First, the connecting portion 18 of the reinforcing wire 7 is fixed to the second intermediate spiral portion 11c of the coil spring 11 with a clip 10. Next, the connecting part 28 is fixed to the first intermediate spiral part 21b of the adjacent coil spring 21 via the connecting part 19, and the connecting part 29 bent down from the connecting part 28 extends to the coil spring 31 and connects to the second intermediate spiral part 21b of the adjacent coil spring 21. The connecting portion 38 is fixed to the intermediate spiral portion 31c, and the connecting portion 39 is further bent down and extended to the coil spring 41. The connecting portion 48 is fixed to the third intermediate spiral portion 41d, and the connecting portion 49 is straight. The second intermediate helical portion 51 of the coil spring 51 rises at
c, first intermediate spiral portion 6 of coil spring 61
1b, respectively. In this way, the reinforcing wire 7
are intermediate helical parts b, c,
d, and each coil spring is connected.

The reinforcing wire 7 connects each coil spring 11,
Since the coil springs 21, 31, etc. are made to work together, the load on one coil spring affects the other coil springs, and the deflection of the helical portion of the coil spring is suppressed, thereby making this coil spring array hard. In addition, since the reinforcing wire 7 is fixed at the intermediate helical portion of each coil spring, the area corresponding to the body diameter of the coil spring definitely increases in hardness, and the surface width of the peripheral part of this spring device increases. It can be made hard with

Furthermore, since the reinforcing wire 7 connects all the coil springs located at the periphery of the spring device, uniform hardness can be obtained at the periphery. Furthermore, since the reinforcing wire 7 moves up and down together with the helical portions while suppressing the deflection of each coil spring helical portion, there is an advantage that the cushioning performance of the coil springs is less compromised.

Figures 4 to 5 show other embodiments.
In the diagram, the reinforcing wire 7 is connected only to the first intermediate helical portion b of the parallel coil spring. In this case, when the coil spring is drum-shaped, the amount of deflection is greater than that of the spiral portion with a large winding diameter, so suppressing the deflection of the spiral portion with a large winding diameter is more effective in increasing the stiffness. .

In the case shown in FIG. 6, the connecting portion 9 of the reinforcing wire 7 is raised and lowered by increasing the bending angle.
This is because when the lower end helical portion e of the coil spring bottoms out due to the load on the surrounding area of the spring device, the connecting portion 9 that rises supports the load and prevents the surrounding area of the spring device from losing its shape. This contributes to ensuring that the use of the system is not impaired.

As described above, the present invention connects a large number of springs on a flat plate to form a spring unit, and connects the spring rows located at the periphery of the spring unit by connecting the upper and lower helical parts of each coil spring with a frame line. Since the intermediate helical portions are connected by reinforcing wires that are bent to repeatedly rise and fall, the deflection of the helical portions of each coil spring connected by the reinforcing wires is suppressed, and the springs located at the periphery of this spring device are The hardness of the rows is uniform. Furthermore, since the reinforcing wire repeatedly rises and falls, it has a spring action, and even if the surrounding area is severely crushed by the load, the rising and falling parts of the reinforcing wire support the vertical force by bending, and the area around the spring device It has the effect of preventing it from losing its shape,
This has the practical effect of providing a spring device whose periphery is uniformly hard without impairing cushion performance.

[Brief explanation of the drawing]

Fig. 1 is a side view of a spring device according to the present invention, Fig. 2 is a perspective view, Fig. 3 is an enlarged view taken along the line X-X of Fig. 1, Fig. 4 is a side view of another embodiment, and Fig. 5 is a side view of a spring device according to the present invention. The figure is an enlarged view taken along YY line in FIG. 4, and FIG. 6 is a side view of another embodiment. Code, 1...Coil spring, 2...Helical wire, 3...Spring unit, 4...Frame line (upper), 5...Frame line (lower), 6...Clip, 7...Reinforcement wire, 8 ...Connection part, 9...Connection part, 10...Clip, a...Top spiral part, b...
...first intermediate helical part, c...second intermediate helical part,
d...Third intermediate spiral part, e...Lower end spiral part.

Claims (1)

[Scope of utility model registration request] A spring unit is formed by connecting a large number of springs on a flat plate, and the spring rows located around the periphery of the spring unit are connected by a frame line at the top and bottom spiral parts of each coil spring, and the middle spiral part moves up and down repeatedly. A spring device characterized by being connected by reinforcing wires bent in the following manner.