JPH0412917A - Flexible screw - Google Patents

Abstract

PURPOSE:To enable easy manufacture of the flexible screw in the title for a continuous automatic vessel carrying device or the like by forming a resin layer on a rod, and molding a coil as integral with the resin layer. CONSTITUTION:A resin layer of such thickness as suitable for leaving a coil section is formed on a steel cable rod 53, thereby making a rod-shaped base material 5. Then, the base material 5 is machined, and a coil section 52 and a rod section 51 are left over and formed.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a flexible screw suitable for a continuous automatic container conveyance device or a powder conveyance device, and in particular to a flexible screw suitable for automatically and continuously conveying bottles and powder. The present invention relates to a flexible screw that is very suitably used in a sudame device.

[Conventional technology]

Flexible screws have a wide range of uses, and are typically used in many devices for conveying various articles, and their use in devices for conveying containers or conveying powder or granules is attracting particular attention.

Many devices for automatically and continuously conveying containers, especially bottles, have been developed in the past. However, conventional conveying devices of this type have complex structures and are large-sized devices, and small-sized devices with simple structures have operational problems, while relatively simple and especially large-sized devices There is a strong demand for a device that can continuously and automatically transport bottles without any trouble in operation.

In order to meet the above-mentioned demands, the present inventor has continued to conduct research and as a result has developed a completely new type of automatic conveyance device. This new conveyance device will be explained below with reference to the drawings.

FIG. 1 is a schematic explanatory view of this conveyance device when viewed from above, and FIG. 2 is a cross-sectional view taken along the line A-A' in FIG.
This figure is a perspective view of the rail (3') 5 in FIG. 1, omitted for convenience of explanation. The main points of this device are a pair of rails (3), (3') and a pair of rails (3), (3').
It consists of a flexible screw (1) installed in the container (2).
) For example, while holding a bottle etc., insert this screw (1)
The rotation of the container (2) moves the container (2) in a predetermined direction (illustrated by an arrow).
It is intended to be transported to This flexible screw (1) is made up of a pair of rods (11) and (11') arranged at a distance that allows the container to be held between the rods (11) and (11').
), (11') have coils (12), (12") on them, respectively.
The container (2) is wound on a spiral and acts as a screw to convey the container (2) by its rotation.

This flexible screw has a rail of 3), (3')
It is placed on the lower shelf (32) of the rail (3), (
It is held between the rails (3) and (3') by the magnetic force of the magnets (31) provided throughout the rails (3').

In this case, the rods (11), (11') and the coil (1
2) and (12') are both made of steel cables, so that the action of the magnet works effectively.

In the course of conducting further experimental research on this newly developed conveying device, the present inventor discovered that there were still some problems with this device that needed to be resolved.

That is, when a container (2), for example a bottle, is to be transported by this transport device, the neck of the bottle is gripped using a rod made of steel rope and a fill made of steel rope, so that the neck of the bottle is not damaged in order to transport it. Cracks and scratches are easy to occur, especially when bottles are not only new, but also many used and recycled bottles, and this problem becomes even more serious when it comes to recycled and recycled bottles.

In addition, although there is some flexibility because steel cable rods and coils are used, the flexibility is still insufficient in terms of installing the rail in a curved manner and damaging the container. It has also been found that the strength of rods and coils is likely to decrease due to metal fatigue, and other problems are likely to occur.

As a measure to overcome these various difficulties, the present inventor has also developed a means of forming a resin layer on the surface of a steel cable rod and using a resin coil as the coil, that is, a resin flexible screw.

The present inventor also continued research into using the above-mentioned new resin flexible screw in a powder conveyance device using a flexible screw. The conventional powder conveying device using a flexible screw is, for example, a device in which a spring or Miki is installed in a flexible pipe and the powder is conveyed by rotating this spring, or as shown in FIG. As shown in the figure, a flexible screw (42) is installed in the flexible pipe (41) for transporting powder and granules, and the powder and granules are supplied onto this screw from the hopper (43), and the motor (44)
) is known to automatically transport powder and granular materials by rotating a screw. The flexible screw used in the device for conveying powder and granular materials shown in Fig. 4 is usually constructed by winding one or two steel or metal springs around a steel cable in a spiral shape. There is. However, in the former device for transporting powder and granular materials, in which only a spring is installed in a flexible pull pipe (1-2) and rotated, the spring itself does not rotate properly due to the rotation because the elasticity of the spring is too large. Therefore, the conveying force is greatly reduced, and especially when the conveying device is arranged in a curved manner, the disadvantages mentioned above become noticeable in the curved part, and even when conveying powder and granules from the bottom to the top. Similarly, there is the disadvantage that the conveying force is greatly reduced. Further, in the powder conveying device shown in FIG. 4, it is extremely difficult to wind the spring on the steel cable, and there is a drawback that it cannot be easily manufactured. Further, in either method, since the steel cables and springs are made of steel or metal, the material quality deteriorates due to metal fatigue, leading to breakage.

In order to solve these drawbacks, the present inventor continued research and found that the above-mentioned drawbacks can be overcome when a resin flexible screw is used as the flexible screw of this type of powder conveyance device. . More specifically, since both the rod and coil of the flexible screw newly developed by the present inventor are made of synthetic resin, it is much easier to manufacture than the conventional flexible screw shown in Fig. The operation of winding the spring on the steel cable is completely unnecessary. In addition, compared to the conventional case where only a spring is used, the flexible screw of the present invention has appropriate flexibility and strength because both the rod and the coil are made of synthetic resin.
It has been found that the drawbacks of conventional spring-only conveying devices are overcome.

However, even with the new resin flexible screw developed by the present inventor, forming coils at a predetermined pitch on the rod is a fairly complicated operation and takes time, and it also takes a lot of time to fix the rod and coil. It has been found that the rod and coil may sometimes be insufficiently fixed.

[Problem to be solved by the invention]

Therefore, the problem to be solved by the present invention is to solve the above-mentioned difficulties when using the resin flexible screw (1), in other words, a steel cable rod with a resin layer formed on its surface and a resin coil. be.

[Means for Solving the Problem] This problem is solved by forming a resin layer integrally molded with the coil on the surface of the steel cable rod.

[Function and structure of the invention]

Since the coil and the rod are substantially integrated, there is no separation between the coil and the rod, and there is no misalignment between the two, allowing the container to be transported more reliably. be able to.

Furthermore, since the coil is manufactured as an integral part, there is no need to wind the coil on the rod, and such complicated labor can be omitted.

In the present invention, since a resin layer is formed on the surface of the rod made of steel cable, and the coil is also made of resin, problems caused by metal fatigue of the rod or coil can be largely prevented. In particular, coils are constantly in contact with containers and granules, and stress is applied to them, so metal fatigue is especially noticeable, but this can be prevented. In addition, the surface of the rod and the coil have greater flexibility than steel cables, and the flexibility of the flexible screw becomes greater, making curved designs easier in particular, and improving torque transmission.

In particular, damage to the portion of the container conveyed by the flexible screw that is gripped by the screw, such as the neck of the bottle, is greatly reduced. That is, since a resin layer is formed on the surface of the rod, damage to the neck is greatly reduced compared to when the rod is conveyed while being gripped by a steel cable-shaped coil.

Furthermore, when the flexible screw of the present invention is used in a powder conveyance device, the drawbacks of conventional screws using springs can be overcome, as described above.

The resin used in the present invention is, for example, ultra-high molecular weight polyolefin, polyoxymethylene, or polyamide, and those having a certain degree of strength and flexibility are preferably used.

In the present invention, as the resin used, a resin having magnetism may be used, and a resin containing a magnetism imparting component can be exemplified as a representative example.

The magnetism imparting component is not particularly limited as long as it is a component capable of imparting magnetism to the resin, and representative examples include ferrite, iron powder, and the like.

When manufacturing the screw of the present invention, as shown in Fig. 5, a resin layer is formed on the steel cable rod (53) with a thickness that allows the coil portion to remain, and a rod-shaped base material (5) containing the steel cable as a whole is formed on the steel cable rod (53). First, manufacture. Next, the coil portion (52) and rod portion (51) may be left and formed by cutting from this rod-shaped base material (5).

The size of the rod of the present invention is usually 6 to 15 m, the size of the coil is 1 to 4 m, and the formed pitch width is about 25 to 45 m.

For convenience of explanation, the screw of the present invention is explained by taking as an example a conveying device having a structure shown in FIG. 1 and a powder conveying device shown in FIG. 4, but containers and powder can be conveyed using a flexible screw. It can be widely applied to structural devices.

〔Effect of the invention〕

According to the present invention, it is possible to transport containers and powder materials efficiently at low cost, and the industrial effects thereof are extremely large.

[Brief explanation of drawings]

Fig. 1 is a diagram of the container conveyance device viewed from above, Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1, and Fig. 3 explains the rail in Fig. 1. FIG. Moreover, FIG. 4 is a schematic explanatory diagram of the powder conveyance device. FIG. 5 is an explanatory diagram for explaining the method for manufacturing the screw of the present invention. 1.1'3.3' Flexible screw container rail Ront coil Fig. Fig. Fig. Fig. Metal magnet shelf section Vibe Flexible disk +172- Hopper motor base material Rond section Coil section Steel cable rod

Claims (3)

[Claims] (1) A flexible screw in which a resin coil is spirally formed on the surface of a rod on which a resin layer is formed, and the resin layer and the resin coil are manufactured as an integrally molded product. A flexible screw featuring: (2) The flexible screw according to claim (1), wherein the flexible screw is a flexible screw for a container conveyance device. (3) The flexible screw according to claim (1), wherein the flexible screw is a flexible screw for use in a powder conveyance device.