Spring tube winding machine

The present invention relates to a spring winding machine, and more particularly, to a spring tube winding machine that can stack and arrange spring tube materials in which cords are embedded, at correct angles.

In general, a spring tube is a core component for an air suspension system and serves to reduce a damage of a car body and provide a comfortable ride to a passenger by connecting a car axle and the car body with each other by pneumatic pressure to thereby properly reduce vibration or shock transferred from the surface of the road during drive, so as to adjust a buffer power according to drive conditions and provide smoother feeling of drive by adjusting pneumatic pressure.

Moreover, the spring tube is mounted between a lower housing fixed to the car axle and an upper housing fixed to the car body, and provides buffering action by being filled with compressed air. Here, the spring tube is manufactured through the steps of inserting spring tube materials, which are stacked in multiple layers, into a melting machine and performing compression molding at high temperature, and in this instance, the spring tube is determined in buffering force and product quality by cords arranged inside in a mesh form.

However, the stacking and winding process of the spring tube materials depends on a worker's skill level, and hence, it makes a great difference in buffering force and product quality of the spring tube because an intersection angle of the cords is not exactly arranged at a preset angle.

Moreover, in order to wind the spring tube materials into a cylindrical form, a plurality of spring tube materials are stacked and wound in order on a winding roller, and the stacked and wound spring tube materials are separated from the winding roller, and are transferred to the high-temperature melting process. In this instance, the stacked and wound spring tube materials get in close contact with the winding roller, and hence, they are not easily separated even after the stacking and winding process is finished. Accordingly, when the worker forcedly pulls and separates the spring tube materials, the arranged angle of the spring tube materials is varied, and it causes poor quality of products,

Technical Problem

Accordingly, the present invention has been made in an effort to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide a spring tube winding machine, which can correctly arrange a cord intersection angle of spring tube materials at a preset angle during stacking and winding work, and easily separate the spring tube materials from a winding roller after the stacking and winding process.

Technical Solution

To achieve the above objects, the present invention provides a spring tube winding machine including: a winding roller formed in a cylindrical shape having an uneven portion ( 12 ) formed on the outer circumferential surface thereof, so that the winding roller ( 10 ) winds spring tube materials, which are a first rubber sheet (T 1 ), a first cord topping sheet (C 1 ), a second cord topping sheet (C 2 ) and a second rubber sheet (T 2 ), in order, the winding roller ( 10 ) including a plurality of discharge holes ( 16 ) for ejecting compressed air injected through a nozzle ( 14 ), which is disposed at an end of the winding roller ( 10 ), in the outward direction from the inside; and a table having a reference line for setting a seating angle in such a fashion that the spring tube materials wound on the winding roller are seated in an unfolded state and the cords embedded in the first cords topping sheet and the second cord topping sheet are intersected with each other.

In this instance, the reference lines are formed in a set of a pair at a position where they are symmetric at an angle of 45 to 65 degrees.

Moreover, at least two kinds of the reference lines are indicated at different inclination angles and have different colors.

Furthermore, the discharge hole includes an inclined hole formed in such a fashion that the compressed air is discharged in a direction that the wound spring tube materials are removed.

Advantageous Effects

According to the present invention, the spring tube materials are seated at correct positions and wound on the winding roller through the reference lines marked on the table so as to be exactly arranged at the preset cord intersection angle, and so, the present invention can keep even quality of the spring tube and even buffering force. Moreover, the present invention enables the spring tube materials to be easily removed from the winding roller after completion of the stacking and winding process because the discharge hole is formed to spray the compressed air in the outward direction from the inside.

FIG. 1 is a configurative view of a spring tube winding machine according to the present invention,

FIG. 2 is a configurative view showing a state where a spring tube material is wound using the spring tube winding machine according to the present invention,

FIG. 3 is a configurative view of a winding roller of the spring tube winding machine,

Reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings.

FIG. 1 is a configurative view of a spring tube winding machine according to the present invention, FIG. 2 is a configurative view showing a state where a spring tube material is wound using the spring tube winding machine according to the present invention, and FIG. 3 is a configurative view of a winding roller of the spring tube winding machine.

The present invention relates to a spring tube winding machine. The spring tube winding machine includes a winding roller 10 and a table 20 , which are provided to correctly arrange previously prepared first and second rubber sheets T 1 and T 2 and first and second topping sheets C 1 and C 2 at an intersection angle of a mesh form, in which cords C are preset, when they are wound on the winding roller 10 and to easily separate spring tube materials from the winding roller 10 after completion of the winding work.

The winding roller 10 according to the present invention is formed in a cylindrical shape having an uneven portion 12 formed on the outer circumferential surface thereof, so that the winding roller 10 winds spring tube materials, which are a first rubber sheet T 1 , a first cord topping sheet C 1 , a second cord topping sheet C 2 and a second rubber sheet T 2 , in order, and includes a plurality of discharge holes 16 for ejecting compressed air injected through a nozzle 14 , which is disposed at an end of the winding roller 10 , in the outward direction from the inside.

To wind the first rubber sheet T 1 , the first cord topping sheet C 1 , the second cord topping sheet C 2 and the second rubber sheet T 2 , which are the spring tube materials, in order. The winding roller 10 includes an uneven portion 12 formed on the outer circumferential surface thereof, a nozzle 14 disposed at an end for injecting compressed air, and a plurality of discharge holes 16 for ejecting compressed air injected through the nozzle 14 outwardly from the inside.

The winding roller 10 is made of lightweight and easily processable material including synthetic resin. The uneven portion 12 formed on the outer circumferential surface of the winding roller 10 has a lattice pattern so as to rapidly interfuse the compressed air, which is injected through the discharge hole 16 , between the winding roller 10 and the spring tube materials.

After the winding process, when the compressed air is injected through the nozzle, while the compressed air is evenly dispersed along the discharge hole 16 and the engraving portion, the spring tube materials are pneumatically floated on the winding roller 10 , and hence, the spring tube materials can be easily separated.

Moreover, a plurality of the discharge holes 16 are formed at even equal angles to communicate with the nozzle 14 , and inclined holes are formed in such a fashion that compressed air is discharged in a direction that the wound spring tube materials are separated. That is, as shown in FIG. 3 , the discharge holes 16 are formed at an inclination angle ranging 30 degrees to 50 degrees relative to a central axis of the winding roller 10 , so that the compressed air is sprayed at the inclination angle along the discharge holes 16 and the spring tube materials wound on the outer circumferential surface of the winding roller 10 are naturally pushed and separated.

In the meantime, the winding roller 10 is detachably mounted through a support bar B disposed at an end of the table 20 , which will be described later, and hence, is detached to be used during the winding work, but after completion of the winding work, the spring tube materials are separated in a state where winding roller 10 is attached to the support bar B.

Furthermore, the table 20 according to the present invention includes a reference line 22 for setting a seating angle in such a fashion that the spring tube materials wound on the winding roller 10 are seated in an unfolded state and the cords C embedded in the first cords topping sheet C 1 and the second cords topping sheet C 2 are intersected with each other. The table 20 is formed in a plate type having a flat upper face, and end portions of the first and second cords topping sheets C 1 and C 2 are seated in such a way as to correspond to the reference line 22 , so that the cords C embedded in the first and second cord topping sheets C 1 and C 2 are intersected with each other in the mesh form. Here, the reference lines 22 are formed in an intaglio line on the upper face of the table 20 or have colors different from the table 20 so as to be easily discernible during work.

In this instance, the reference lines 22 are formed in a set of a pair at a position where they are symmetric at an angle of 45 to 65 degrees. The reason is to intersect and arrange the first and second cord topping sheets C 1 and C 2 into the mesh form. For an example, when the cord C of the first cord topping sheet C 1 is located at an angle of 50 degrees, the cord C of the second cord topping sheet C 2 must be located at an angle of −50 degrees, and hence, a set of the reference lines 22 of the same angle as shown in FIG. 1 are located at symmetric positions.

Furthermore, at least two kinds of the reference lines 22 are indicated at different inclination angles a 1 and a 2 , and have different colors. The spring tube is determined in its buffering force by the intersection angle of the cords C, and hence, in order to simply vary the intersection angle of the cords C according to kinds of vehicles and requirements to which the present invention is applicable, a plurality of reference lines 22 are indicated at an angle equivalent to the corresponding buffering force and different colors are indicated so that each of the reference lines 22 are discernible, whereby the present invention has a merit to rapidly and correct change work when a winding angle of the first and second cord topping sheets C 1 and C 2 is changed.

In use, a shown in FIG. 2 , after the first rubber sheet T 1 is seated on the table 20 , the winding roller 10 is rotated so that the first rubber sheet is wound in a circular form, and then, the first cord topping sheet C 1 is seated on one of the reference lines 22 of the table 20 and the winding roller 10 is rotated so that the first cord topping sheet C 1 is wound on the outer circumferential surface of the first rubber sheet T 1 . After that, when the second cord topping sheet C 2 is seated on the other reference line 22 and the winding roller 10 is rotated, the cord C of the first and second cord topping sheets C 1 and C 2 are intersected with each other into the mesh form. Continuously, when the second rubber sheet T 2 is seated on the table 20 and the winding roller 10 is rotated, the winding work is finished.

After completion of the winding work of the first and second rubber sheets T 1 and T 2 and the first and second cord topping sheets C 1 and C 2 , when compressed air is injected via the nozzle 14 , while the compressed air is injected between the outer circumferential surface of the winding roller 10 and the inner circumferential surface of the spring tube material along the uneven portion 12 through the discharge hole 16 , the wound spring tube materials are pneumatically floated, so that they can be easily removed from the winding roller 10 .

In the meantime, in order to evenly act the buffering force by the cords C to the entire of the outer circumferential surface of the spring tube, it is preferable that the winding of the first and second cord topping sheets C 1 and C 2 is carried out at equal angles of 180 degrees.