JPH0114860B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a continuous manufacturing method for a coiled bellows hose in which a reinforcing coil is attached or embedded in the hose wall, and in particular, a remote switch is installed at the proximal end of the hose. The present invention relates to a method for continuously manufacturing a bellows hose having at least two parallel coils attached or embedded therein for energization without any length restriction, such as a vacuum cleaner hose with a vacuum cleaner hose attached thereto.

(Problems to be Solved by the Prior Art and the Invention) Conventionally, as a method for manufacturing a hose with two parallel coils, two reinforcing wire rods are wound around a mandrel that moves straight in one direction in succession using a winding machine. The outer periphery of a coil formed by winding it into a double pitch was coated with a soft synthetic resin tube extruded from an extruder, but in this method, the length of the hose was limited by the mandrel, It has the disadvantage that it cannot be made into long hoses, and there is a method described in Japanese Patent Publication No. 7197-1983 that uses a specially structured forming shaft to form long bellows hoses. This method requires multiple coil spring cylinder shafts, multiple separators, guide shafts, two sets of coil forming machines, etc., making the overall device very complex and making it difficult to manufacture and repair the forming shafts, etc. It had a very troubling drawback.

(Means for Solving the Problems) The present invention solves the above problems and provides at least two
To provide a method for continuously and efficiently manufacturing a long bellows hose with parallel coils attached or embedded therein using a simple device.

That is, the first invention of the present invention relates to a method for manufacturing a bellows hose in which a coil is attached to a hose wall, and a plurality of coils are formed by simultaneously supplying a plurality of reinforcing wires to a set of coil forming equipment. The tape for forming a hose wall is wound in a spiral shape from above this coil while guiding the coil into a multi-parallel spiral groove carved on the surface of a mandrel supported in a cantilever state and rotating it forward in a spiral manner. This method is characterized in that the molded hose is moved forward while being rotated spirally by an endless belt wound around its outer periphery, and then sent out from the tip of the mandrel. The second invention of the present invention relates to a method for manufacturing a bellows hose that has a two-layered structure of an inner wall and an outer wall, and a coil is embedded between the inner and outer walls, and has a plurality of parallel spiral grooves carved on the circumferential surface. After winding the tape for forming the inner wall of the hose in a spiral shape on the surface of the mandrel that was installed and supported in a cantilevered state, multiple reinforcing wires were simultaneously fed to a set of coil forming equipment to form multiple pieces. A coil is guided into the spiral groove of the mandrel from above the tape, and is rotated and advanced in a spiral manner together with the tape, and then a tape for forming a hose outer wall is wound spirally from above the coil to form a hose, This molded hose is moved forward while rotating in a spiral with an endless belt wound around the outer periphery.
It is characterized in that it is fed out from the tip of the mandrel.

(Example) Hereinafter, as an example of the present invention, a case of manufacturing a synthetic resin bellows hose with two parallel coils attached inside will be described with reference to the accompanying drawings.

In the method of the present invention, a coil forming device A and an immovable cylindrical mandrel B supported and fixed on a base in a cantilevered manner are used.
use.

FIG. 1 is a schematic diagram showing an example of the above-mentioned coil forming apparatus A, in which two reinforcing wire rods 2, 2' are made by coating a synthetic resin on steel wires wound around rotatable drums 1, 1'. is a rotatable guide roll 4 which is pulled out from the drums 1 and 1' by the rotation of the feed roll 3.
Pieces 6 and 7 are rotatable while being guided by guide holes (not shown) of the guide plate 5 through the guide plate 5.
After being conveyed continuously towards the above-mentioned pieces 6 and 7, the coils are formed into two coils 8 and 8' and rotated forward.

FIG. 2 is a plan view showing an example of the mandrel B, in which two spiral grooves 1 are formed on the circumferential surface 11 of the mandrel.
2 and 12' are carved in parallel at a constant pitch.

As shown in FIG. 3, the two coils 8 and 8' formed by the coil forming apparatus are fitted into the spiral grooves 12 and 12' of the mandrel, and are spirally formed in the axial direction along the grooves. Rotate forward.

The coils 8, 8' are defined at a constant pitch by the spiral grooves 12, 12', and during the spiraling process, an adhesive is applied to the outer circumferential surface by an adhesive applicator (not shown) to form a hose wall. The synthetic resin tape 13 is wound spirally, and the overlapping adjacent side edges are adhered to form a hose wall 14.

The hose wall 14 may be formed by spirally winding a soft synthetic resin tape continuously extruded from an extruder and fusing its side edges together. An endless belt 15 is wound around the outer periphery of the hose wall 14, and by driving this belt, the hose wall 14
A bellows hose 16 consisting of a coil 8, 8' attached to the inner surface of the hose rotates and slides in the axial direction on the surface 11 of the mandrel, and is then continuously sent out from the tip of the mandrel. I'm going to go.

As another embodiment of the present invention, when obtaining a synthetic resin bellows hose in which two parallel coils are embedded between the inner and outer walls forming a two-layer structure, a coil forming apparatus A similar to the above embodiment and a cylindrical It can be manufactured using a type mandrel B as follows.

That is, first, a synthetic resin tape for forming the inner wall of the hose is supplied onto the circumferential surface 11 of a mandrel on which two spiral grooves 12, 12' are carved, and the synthetic resin tape is wound spirally so that its side edges meet. After adhering or fusing the tape, two coils formed by a coil forming device are supplied on top of this tape in the same manner as in the above embodiment, and the coils are guided into the spiral grooves 12 and 12' of the mandrel to form the above-mentioned coils. Rotate and move forward in a spiral together with the inner wall forming tape.

Next, a synthetic resin tape for forming the outer wall of the hose is spirally wound around the outside of the coil, and its side edges are glued or fused together to form a hose, and the endless belt 15 is wound around the outer periphery of the outer wall of the hose. By driving this belt, a bellows hose made up of inner and outer walls and a coil embedded therebetween rotates forward on the mandrel and is continuously fed out to be manufactured.

In addition, the tape forming the hose wall is not limited to synthetic resin in any of the above embodiments, and materials such as cloth and paper can be used.

(Actions and Effects of the Invention) As described above, the present invention has the following effects.

By synchronously forming multiple coils, guiding the coils into the mandrel spiral groove, forming the hose wall by spirally winding the tape, and driving the belt, it is possible to produce a bellows hose with coils of variable length without using complicated equipment. It can be manufactured continuously and efficiently.

A single set of coil forming equipment is used to form multiple coils, for example two coils, and there is no need to use a specially structured forming shaft, so the equipment as a whole is very simple, easy to manufacture and repair, and easy to manufacture. Cost is low.

Even if there is an error in the state in which the coils of multiple reinforcing materials are formed, by introducing the multiple coils into the multiple spiral grooves of a fixed mandrel, the desired diameter and pitch can be regulated and precision can be achieved. You can get a high bellows hose.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an example of a coil forming apparatus used in the present invention, FIG. 2 is a plan view of a mandrel,
FIG. 3 is an explanatory diagram of one embodiment of the present invention. 2, 2'...Reinforcement wire, 3...Feed roll, 4
... Guide roll, 5 ... Guide plate, 6,
7... Piece, 8, 8'... Coil, 11... Surrounding surface of mandrel, 12, 12'... Spiral groove, 13...
Synthetic resin tape, 14... hose wall, 15... endless belt, 16... bellows hose.

Claims (1)

[Scope of Claims] 1. A multi-parallel spiral carved on a mandrel surface supporting in a cantilevered state a plurality of coils formed by simultaneously supplying a plurality of reinforcing wires to a set of coil forming devices. While guiding the coil into the groove and rotating it forward in a spiral, a tape for forming a hose wall is wound spirally from above this coil to form a hose, and this formed hose is wound around the outer circumference by an endless belt. A continuous manufacturing method for a coiled bellows hose, characterized in that the coiled bellows hose is advanced while rotating in a spiral pattern and is fed out from the tip of a mandrel. 2. After winding the tape for forming the inner wall of the hose in a spiral shape on the surface of the mandrel, which is supported in a cantilevered manner and has multiple parallel spiral grooves cut into its circumferential surface, a plurality of reinforcing wires are wound into a set. A plurality of coils, which are simultaneously supplied to a coil forming device and formed, are guided from above the tape into the spiral groove of the mandrel, rotated and advanced in a spiral together with the tape, and then a tape for forming a hose outer wall is fed from above the coil. A coil is characterized in that a hose is formed by spirally winding the hose, and the formed hose is advanced while being rotated spirally by an endless belt wound around its outer periphery, and is fed out from the tip of a mandrel. Continuous production method of corrugated bellows hose.