JPH06134889A - Hose for driving feed member - Google Patents

Abstract

PURPOSE:To enhance the quietness, abrasion resistance and bending resistance of a hose using compressed air as a driving source. CONSTITUTION:Weft yarns are spirally wound around the outer peripheries of a specific number of arranged warp yarns at a specific winding angle to constitute a base fabric. The inner and outer surfaces of the base fabric are coated with a thermoplastic elastomer and vertical stripe like embossed patterns 1a extending along the axial line of the warp yarns are formed on the outer peripheral surface of the elastomer coating layer 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier driving hose, and more particularly to a carrier such as a carrier container at low noise and high speed by utilizing expansion and deformation of the hose by pressure-feeding a working fluid such as compressed air. The present invention relates to a carrier driving hose that can move along the hose.

[0002]

2. Description of the Related Art In an automobile parts assembling factory, it is important to accurately and promptly bring in the parts used in each process into its work area or the like in order to smoothly proceed the assembling process. In the past, a worker in charge of transportation carried in a container of necessary parts to each work area by a trolley or the like, but various parts conveying devices have been developed in order to improve work efficiency. The required functions of this type of parts conveyor are:
The noise of the drive source and the noise generated when the truck is running are small, the impact is small during transportation and stop, and high-speed transportation is possible. Further, there are electric motors, compressed air, hydraulic pressure, etc. as driving sources for driving these devices, but recently compressed air has been used as the driving source because of low noise generated during traveling and easy maintenance. Devices are receiving attention.

As a conveyer conveyor device that meets the above requirements, a conveyer conveyor device equipped with a drive air hose utilizing compressed air has been developed. FIG. 6 shows the wall surface W
1 shows a transfer conveyor device 50 configured to transfer a transfer container 52 suspended by a suspension rail 51 fixedly supported by a compressed air to a predetermined direction.

The structure of the transfer conveyor device will be briefly described below with reference to FIG. 6, and the behavior of the transfer drive air hose will be described with reference to FIGS. Figure 6
In the figure, reference numeral 53 indicates a container support frame, and the container support frame 53 is a suspension rail 5.
1 is suspended by a suspending roll 54 that travels above 1, and a transport container 52 for transporting components can be detachably mounted on the lower end portion thereof.

Further, two guide rolls 55 and 56 are attached to the container support frame 53 in two rows in the vertical direction at predetermined intervals so that the guide rolls 55 and 56 are rotatably substantially parallel to each other. Further, an air hose 57 is laid between the two guide rolls 55, 56 separated from each other in the vertical direction so as to coincide with the transport direction of the transport conveyor device 50. The ends of the air hose 57 are connected to different compressed air supply sources (not shown), and a switching valve (not shown) provided in the path allows switching between the feeding side and the exhaust side. There is.

The air hose 57 is a container support frame 5.
3 is sandwiched by a pair of drive rolls 58 facing each other provided between two guide rolls 55, 56 arranged apart from each other in the transport direction, and the hose cross-sectional shape of the sandwiched portion is flat. . That is, as shown in FIG. 7A, when compressed air is fed into the air hose 57 and the internal pressure P acts on the hose, the hose cross-sectional shape expands into a substantially annular shape. This annularly expanded air hose 57 is sandwiched between two rollers facing each other at the drive roll 58 and is crushed into a plate shape. In this way, the container support frame 53
Each time the vehicle runs along the air hose 57, the air hose 57 is repeatedly bent at substantially the same positions of the upper and lower ends of the hose as shown in FIG. 7B.

Next, the principle of the drive system of the conveyor system shown in FIG. 6 will be described with reference to FIG. First,
When compressed air is supplied from the A end side of the air hose 57 when the container support frame 53 is stopped at the stop position I as shown in FIG. 7A, the outer surface of the hose is pinched by the drive roll 58. The hose end is closed at this portion. For this reason, a force F1 (hereinafter, this force is referred to as a hose expanding force F1) that tries to spread the hose crushed by the working internal pressure outward is applied. At this time, the driving roll 58 and the surface of the air hose 57 are in pressure contact with each other through a predetermined frictional force, and the driving roll 58 is rotated in the direction of the arrow in the drawing by the tangential component force of the roll of the hose expanding force F1. However, a propulsive force is generated toward the end of the hose B as a whole. As a result, the entire container support frame 53 can be moved in the B end direction. The circuit connected to the end of the hose B is switched to the air exhaust side so that smooth exhaust can be performed when the driving roll 58 moves toward the end B.

In order to stop the container support frame 53 traveling by the action of the hose expanding force F1 of the air hose 57 in the stop position II as shown in FIG. At the same time as stopping, the outlet on the B end side may be closed. Thereby, the container support frame 53 can be stopped at a predetermined position. On the contrary, in order to move the container support frame 53 toward the A end of the air hose 57, compressed air is fed from the B end to the air hose 57 as shown in FIG. Just exhaust it.

[0009]

By the way, the air hose used in the above conveyer conveyor device is composed of a base cloth and a resin portion covering the base cloth. The base cloth is
As shown in FIG. 9, a weft yarn 61, 62 is wound around the warp yarn 60 extending in the longitudinal direction in a double spiral manner in opposite directions at a predetermined winding angle, and is composed of a reinforcing fiber of a polyester resin. There is. Further, the soft vinyl chloride resin 63 is coated from the inner and outer surfaces of the reinforcing fibers by using this base cloth as a core, and a hose integrally coated with the resin is formed.

Since the resin-coated hose may have a thin wall thickness of the coating resin, the hose coated with the weft yarns 61 and 62 wound in a spiral shape may be arranged along the arrangement direction shown in FIG.
As shown in (a) and (b), a fine wavy uneven pattern in the bias direction is formed. When the transport container travels, the drive roll rolls and slides on the uneven surface, so that the roller picks up the unevenness of the hose surface and vibrates finely, resulting in continuous vibration noise. Further, when the transport container travels, the roller presses only the convex portion on the surface of the hose and slides, so that the convex portion is significantly worn. For this reason, the base fabric is partially exposed on the surface of the hose, and durability becomes a problem.

Therefore, if the hose is used thicker, the hose surface can be smoothed by filling the surface of the wavy uneven pattern in the bias direction formed on the hose surface. Although it is possible, the hose flexibility decreases due to the increased wall thickness, and the hose expansion force F1 during air feeding
Will not be transmitted smoothly, and the transport speed of the transport container will slow down.

Further, during repeated running of the container, a cutout portion having a thin resin coating film is formed at the portion where the reinforcing fiber is arranged at the fold position of the hose, and therefore bending fatigue occurs at this portion, causing a crack on the resin surface. There is also a problem that occurs.

Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, to maintain quietness during traveling of a transport container, etc., and to have excellent wear resistance and durability against repeated bending. The object of the present invention is to provide a hose for driving a carrier having good properties.

[0014]

In order to achieve the above object, the present invention provides a base fabric by spirally winding a weft yarn around a predetermined number of warp yarns at a predetermined winding angle. A vertical stripe-shaped uneven surface extending along the axial direction of the warp is formed on the outer peripheral surface of the thermoplastic elastomer coating in which the inner and outer surfaces are molded and coated.

At this time, it is preferable that the thermoplastic elastomer is composed of a polyurethane-based thermoplastic elastomer, and the base cloth is coated by extrusion molding of the polyurethane-based thermoplastic elastomer.

[0016]

According to the present invention, a weft yarn is spirally wound around a predetermined number of warp yarns at a predetermined winding angle to form a base cloth, and the inner and outer surfaces of the base cloth are molded and covered with a thermoplastic elastomer coating. Since the vertical striped uneven surface extending along the axial direction of the warp is formed on the outer peripheral surface of the warp, it is possible to prevent the bias uneven surface due to the fiber direction of the base cloth from appearing on the hose surface, and the driving roller is By traveling along the vertical striped uneven surface, noise during traveling can be minimized.

At this time, a polyurethane thermoplastic elastomer is used as the thermoplastic elastomer,
Since the base cloth is coated by extrusion molding of the polyurethane thermoplastic elastomer, abrasion resistance and flex resistance can be improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a carrier driving hose according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an outer surface of a carrier-driving hose 1, on which a vertical striped concave-convex pattern 1a extending in the hose axial direction is formed over the entire circumference. In this embodiment, the hose has an inner diameter of 52.5 mm, a hose wall thickness of 2.05 mm,
Polyurethane thermoplastic elastomer is used as the material for the coating, and the uneven pattern 1a formed on the surface of the coating has a trapezoidal shape in which the peaks and valleys have the same shape in the cross-sectional direction. And the height of the valley portion is set to 0.8 mm.

The reinforcing fiber arrangement and the coating resin applied to this embodiment will be described below with reference to FIGS. 2 to 4, and in FIG. 5, the vertical striped uneven pattern 1a formed on the hose surface will be described. To do. FIG. 2 is an exploded perspective view of the reinforcing fibers forming the base cloth of the carrier driving hose 1. In the figure, reference numeral 2 indicates a warp yarn. The warp yarn 2 is made of a polyester resin fiber, and in a state where two warp yarns are aligned with each other, 60 places at a substantially equal interval in the circumferential direction of the hose, a total of 12 places.
0 is arranged. Furthermore, around the warp 2 there is a weft 3
In the state where the two windings are aligned so that the winding angle α is 54.7 °, a total of 36 windings are wound at 18 positions at substantially equal pitches in the circumferential direction. On the outer periphery, two wefts 4 having the same number of threads are wound in the opposite direction to the wefts 3 in a state where two wefts are aligned so that a winding angle α = 54.7 °.

In this embodiment, twisted yarns having a fineness of 1500 d / thread (d: denier) are used, and each twisted yarn is twisted about 50 times / m. The above winding angle α = 54.7 ° is called a static angle, and is given as an angle at which the axial extension of the hose and the hoop expansion can be balanced.
By wrapping 4 around the warp 2 at this winding angle, it is possible to minimize the occurrence of kinks in the curved portion of the hose.

At this time, since the warp yarns 2 and the weft yarns 3 and 4 are both twisted yarns and are used by aligning two yarns, a base fabric made of three layers of reinforcing fibers as shown in FIG. 3 is incorporated in the hose cross section. Even if they are present, there is a sufficient gap between the fibers. Therefore, the coating 5 made of thermoplastic elastomer or the like can sufficiently penetrate between the reinforcing fibers to firmly bridge the resin formed on the inner surface and the outer surface. In FIG. 3, (a) is a part of the hose cross section and (b) is an enlarged part of the hose vertical cross section. As shown in FIG. The cross-sectional shape of the concave-convex pattern 1a is a continuous trapezoidal shape, and the wefts 3 and 4 are wound around the warp 2 at a predetermined winding angle at a substantially central position in the thickness direction of the cross section. The base cloth is configured.

Here, a method of forming a hose coating having a vertical striped uneven pattern on the outer surface of the hose will be described.
FIG. 4 shows a part of an extrusion mold for molding the air hose of this embodiment. In the figure, reference numeral 6 indicates a base fabric composed of three layers of reinforcing fibers 2, 3, and 4,
The base cloth 6 continuously descends in the mold 7. The molten resin is pressed and extruded from the inner die 7a against the base fabric 6 passing through the die 7, and the resin is filled so that it penetrates through the gaps of the reinforcing fibers and reaches the outer die 7b. A hose 1 having a predetermined size is molded therein.

At this time, a large number of trapezoidal tooth profiles as shown in FIG. 1 are formed over the entire circumference on the inner peripheral surface of the outer mold 7b at the lower end of the mold 7. Mold part 7 formed in this way
The hose 1 that has passed through c in a pressurized state has a vertical striped uneven pattern 1a formed on the surface along the hose axis direction, and is continuously discharged from below the mold. Further, the hose is bent by an embossing roller (not shown) located below the mold 7, and finished into a flat hose having vertical stripe-shaped uneven patterns 1a formed on its surface. By this bending process, the hose becomes flat in the state where no internal pressure is applied, that is, in the initial state.

As the thermoplastic elastomer covering the base cloth 6, a polyurethane thermoplastic elastomer is used. Here, in the present specification as a definition of a thermoplastic elastomer, a vulcanization step is not necessary, and it can be molded by heating and melting with a molding machine as described above like ordinary thermoplastics, and is vulcanized at a use temperature. It refers to a polymeric material that exhibits rubber-like elasticity, such as rubber.

The polyurethane-based thermoplastic elastomer used in this example is flexible and can be formed into a fine portion in accordance with the shape of the extrusion mold. Therefore, the metal having the fine tooth-shaped portion as described above is formed. When passing through the mold, the vertical striped concave-convex pattern 1a can be surely formed on the surface of the hose, and the molded hose undergoes smooth expansion deformation when pressed. At this time, since the base cloth 6 is incorporated in the hose 1, it does not excessively expand and deform. Furthermore, due to the properties of the polyurethane-based thermoplastic elastomer, abrasion resistance and bending resistance are improved, and the hose surface does not wear even when the driving roller rotates and slides on the hose surface. No tearing phenomenon occurs in thin parts.

As shown by the arrow in FIG. 4, the thermoplastic elastomer is extruded by being extruded from the inner mold 7a side and being spread into the outer mold 7b. This is because it is possible to confirm by seeing the outer surface of the hose whether the resin has sufficiently penetrated between the reinforcing fibers to form a solid bridge. Therefore, if the filling condition on the inner surface of the hose can be confirmed, the resin may be extruded from the outer mold side 7b.

In this embodiment, the thermoplastic polyurethane elastomer is used as the coating, but other thermoplastic elastomers include polyamide thermoplastic elastomer and the like. This polyamide-based thermoplastic elastomer is more excellent in bending resistance, can minimize damage to the folds due to repeated running, and has good mechanical properties at low temperatures, so when used in cold regions, etc. It is also possible to use the hose material properly according to the region of use. Further, the thermoplastic polyester elastomer is also suitable as the hose coating of the present invention because it has high tensile strength and good bending resistance.

In addition to the above, it is possible to change the type of the coating resin on the inner and outer surfaces in order to utilize the characteristics of various thermoplastic elastomers and to clear the required properties of the hose. In this case, since it is important to integrate the resin on the inner and outer surfaces during extrusion molding, even if one resin is extruded from the inner mold and a different type of resin is extruded from the outer mold, it is necessary to use both of them at the reinforcing fiber position. It is preferable to ensure that a bridge that integrates the resin is formed.

FIGS. 5 (b) and 5 (c) show a modified example of the vertical stripe-shaped uneven pattern 1a formed on the surface of the hose. Vertical striped concavo-convex pattern 1a formed by the above-mentioned mold
On the other hand, when the resin filling pressure is lowered in the mold, as shown in FIG. 9A, a loosely rounded vertical striped uneven pattern 1a is formed as shown in FIG. be able to. Further, such a concave-convex mold may be manufactured from the beginning. Since the hose having the vertical striped concave-convex pattern 1a does not have an acute angle portion on the surface of the hose, there is an advantage that a split portion is less likely to occur even when repeatedly bent.

Further, as described above, the use of the thermoplastic polyurethane elastomer as the coating 5 improves the bending resistance of the hose in terms of material, but as shown in FIG. It is also possible to form the thick portion 1b on the bent portion of the hose. Since the thick portion 1b is formed so as to be raised on the outer surface of the hose as shown in FIG. 1D, the surface of this portion has a vertical stripe-shaped uneven pattern 1
a is not formed. Furthermore, a fold line 1c is formed on the inner surface so as to form a gentle angle. As a result, when the hose is bent as shown in FIG. 6D, the inner surface of the hose is in close contact with the hose, and air leakage at the bent portion can be prevented. In addition, since there is no excessive repeated bending, there is almost no damage to the bent portion.

As a modified example, when the wefts 3 and 4 are alternately knitted (blader), the deformation of the wefts in the hoop direction is sufficiently restrained, so that the number of reinforcing fibers used can be reduced. Even in this case, the surface of the base cloth has irregularities,
Similarly, a smooth roller contact surface can be formed by forming the vertical stripe-shaped uneven pattern 1a.

The reinforcing fibers used for the base cloth include carbon fibers in addition to the above polyester resin fibers,
Polyimide, polyamide and the like are preferable because they have high tensile strength. In this case, in view of the property of extrusion molding, it is preferable to use a base fabric in which a predetermined amount of reinforcing fibers are arranged in order to secure a minimum amount of raw yarn of the base fabric. Further, as the coating resin, a polyurethane-based thermoplastic elastomer, a polyamide-based thermoplastic elastomer, a polyester-based thermoplastic elastomer, and the like are mentioned.
By using a so-called composite material incorporating carbon black or the like, it is possible to further improve the abrasion resistance of the vertical stripe-shaped uneven pattern 1a portion on the hose surface.

In the above description, the driving hose in the conveyer conveyor device as shown in FIG. 6 has been described, but the application of the driving hose is not limited to the above-mentioned example, and the hose is not limited to the above example. Taking advantage of the good flexibility, wear resistance, and bending resistance that are the characteristics of
It goes without saying that it can be used as a light-weight and simple structure of an air jack, or as a drive source for an opening / closing member that reciprocally rotates at a predetermined angle, and can be applied as various drive mechanisms.

In the above description, compressed air is used as the working fluid, but a non-compressible fluid may be used so as to exert a large load resistance.

[0035]

As is apparent from the above description, according to the present invention, it is possible to realize a highly quiet transportation drive hose which can be transported at high speed and which is free from wear and tears at bent portions. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a carrier driving hose according to the present invention.

FIG. 2 is an exploded perspective view showing an embodiment of a carrier driving hose according to the present invention.

FIG. 3 is a partial cross-sectional view of the hose shown in FIG.

FIG. 4 is a partial cross-sectional view showing a portion of an extrusion molding apparatus for molding a carrier driving hose according to the present invention.

FIG. 5 is a partially enlarged perspective view showing a modified example of the carrier driving hose according to the present invention.

FIG. 6 is a perspective view showing an example of a transfer conveyor device using compressed air.

7 is a transverse cross-sectional view showing the deformation behavior of the air hose shown in FIG.

8 is an explanatory view showing a driving principle of the transfer conveyor device shown in FIG.

FIG. 9 is a schematic diagram showing the relationship of arrangement of warp yarns and weft yarns that form the base fabric.

FIG. 10 is a partial cross-sectional view schematically showing a concavo-convex state on the surface of a conventional drive hose.

[Explanation of symbols]

 1 hose 2 warp 3,4 weft 5 coating resin 6 base cloth α winding angle

Claims (2)

[Claims] 1. A base cloth is formed by spirally winding wefts around a predetermined number of warp threads at a predetermined winding angle, and the inner and outer surfaces of the base cloth are molded and coated on the outer peripheral surface of a thermoplastic elastomer coating. A hose for driving a carrier, characterized in that a vertical striped concavo-convex surface extending along the axial direction of the warp is formed. 2. The hose for driving a carrier according to claim 1, wherein the thermoplastic elastomer comprises a thermoplastic polyurethane elastomer.