JPH01242309A - Roller - Google Patents

Abstract

PURPOSE:To make the surface shape of a roller variable in a crown roller, etc., by applying or reducing pressure in a hollow space via the shaft member of a flexible roller body having the hollow space inside and deforming the roller body. CONSTITUTION:A hollow space 2 is formed with a flexible material such as rubber, plastic, etc., in a roller body 1. The hollow space 2 is formed into a barrel shape in which the diameter of the center portion is larger than the diameters of both ends. A through hole 4 which is connected to the hollow space 2 is formed on one shaft member 3 of the roller body 1 and connected to a pressure source or a suction source. For example, by connecting the through hole 4 to a pressure source 7 a pressure fluid (pressure oil, etc.) is fed/discharged into and from the hollow space 2 to expand the roller body 1. Thereby, the surface shape of the roller body can be freely changed easily giving a trough angle. Also, by sucking the pressure fluid with a vacuum pump, a roller with a recessed surface can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a roller whose surface shape can be arbitrarily changed.

<Prior Art> Today, a heald conveyor using an endless heald is commonly used to convey objects.

The above-mentioned heel conveyor is configured to transport objects by appropriately arranging a drive roller driven by a drive source such as an electric motor and a tail roller.

In addition, there are two types of heald conveyors: one that is driven with the middle of the heald flattened in order to convey relatively large items, and the other that is driven to convey granular, lumpy, or powdered items as shown in Figure 5. For general feeding, some healds are driven with a trough angle θ formed in the width direction of the heald.

In the above-mentioned heat converter, one of the drive roller and the tail roller is formed as a so-called crown roller, in which the diameter at the center of the roller is larger than the diameter at both ends, and the other roller has a diameter at the center. It is formed as a so-called straight roller whose diameter is equal to the diameter of both ends. By forming each of the rollers as described above, meandering of the heald is prevented.

Further, in the belt converter, the trough angle θ in the middle direction of the belt is provided by combining a plurality of rollers as shown in FIG.

<Problems to be Solved by the Invention> Each of the above-mentioned rollers is manufactured by individually processing a metal material such as turning according to the shape of each roller.

Therefore, when manufacturing a metal roller, there is a problem in that the manufacturing cost is relatively high.

In addition, in the case of a belt converter that combines the plurality of rollers described above to form a trough angle θ in the middle direction of the heald,
The heald tends to bend between the combined rollers, which can shorten the life of the belt.

Therefore, an object of the present invention is to provide a roller whose surface shape can be arbitrarily changed in order to obtain the above-mentioned crown roller or roller having a trough angle.

<Means for Solving the Problems> In order to solve the above problems, the roller of the present invention includes a roller body that is flexible and has a hollow space inside, and a roller body that is fixed to both ends of the roller body. A shaft member consisting of a shaft member in which at least one shaft member is formed with a through hole that communicates with the hollow chamber of the roller body, and a closing member for closing the through hole formed in the shaft member. It is.

The other roller includes a flange having a shaft member fixed to the roller body, and a shaft integrally formed with the flange and having a stepped portion.

Furthermore, another roller has a flexible roller body with a hollow chamber formed inside, and a telescopic member provided in the hollow chamber, one of which has a right-hand male thread, and the other side has a left-hand male thread. The shaft member is fixed to both ends of the roller body and has a female screw thread in the center that corresponds to the male thread formed on the expandable member.

<Operation> According to the above means, a hollow chamber is provided inside the flexible roller body, and a shaft member having a through hole communicating with the hollow chamber formed in at least one shaft member is attached to both ends of the roller body. Since the hole is fixed to the hole and a closing member is provided in the through hole,
By injecting pressure oil, compressed air, or molten metal that melts at low temperatures into the hollow space of the roller body through the through hole, the roller surface can be formed into a straight shape. It can be formed into a drum shape with the center part bulging out more than both ends. Further, by vacuum suctioning the empty chamber of the roller body through the through hole, the roller can be formed into a small drum shape with the center portion having a smaller diameter than the diameters of both end portions. Furthermore, the shape can be maintained by closing the through hole with a closing member.

In addition, in the roller, the shaft member is formed by a flange fixed to the roller body and a shaft having a step integrally formed with the flange, so that the axial load generated on the roller is absorbed by the thrust bearing. It can be supported by

Furthermore, a vacant space is provided inside the flexible roller body, and an elastic member having a male screw having left and right leads at both ends is provided in this cavity, and the male screw and the male screw are provided inside at both ends of the roller body. Since the shaft member formed with the corresponding female thread is fixed, the shape of the roller surface can be formed into a straight shape, a drum shape, or a small drum shape by rotating the extensible member.

<Example> A roller to which the above means is applied will be described below with reference to the drawings.

[First Example] Figure 1 (A) is a cross-sectional explanatory diagram of the roller of this example, Figure 1 (n) is an explanatory diagram of its main parts, and Figures 2 (A) and (B) are changes in shape. FIG. 3 is an explanatory diagram of the roller supported by a bearing.

In the figure, the roller body 1 is made of flexible rubber or plastic and has a cylindrical shape, and has a cavity 2 formed inside. In this embodiment, the hollow chamber 2 is formed into a drum shape, with a diameter at the center portion being larger than diameters at both ends. The shape of this cavity 2 is not limited to the shape of this embodiment, and it can also be formed into a straight shape in which the diameter at the center is equal to the diameter at both ends.

A shaft member 3 is fixed to both ends of the roller body 1. The shaft member 3 can be fixed to the roller body l by, for example, adhesive. Also, Figure 1 (B)
As shown in the figure, a protrusion 1b is formed over the entire circumference of the end surface 1a of the roller body l, and a protrusion 1b is formed on the flange 3a of the shaft member 3.
It is also possible to form a groove 3b opposite to b, fit the protrusion 1b into /*3b, and press the outer periphery of the flange 3a to caulk and fix both. Of course, it is also possible to use both the adhesive fixing method and the caulking fixing method.

A through hole 4 that communicates with the cavity 2 is formed in at least one of the shaft members 3 . In this embodiment, a through hole 4 is formed in the shaft member 3 on the right side of the figure. This through hole 4 is
It is preferable that the flange 3a be formed to coincide with the axis of the shaft 3c formed integrally with the flange 3a.

A threaded portion 4a is formed at the external open end of the through hole 4, and a valve 5 serving as a closing member is screwed into the threaded portion 4a. This valve 5 communicates with a pressure source or a suction source (not shown) through a through hole 4 in the cavity 2 of the roller body l, and, for example, fills the cavity 2 with pressure oil from the pressure source. This is to close the through hole 4 and maintain the pressurized state in the chamber 2 after changing l as shown in FIG. 2 (8), which will be described later.

As the valve 5, a commercially available high-pressure stop valve or vacuum stop valve can be appropriately used.

The valve 5 shown in the figure is a functional representation of the valve 5. That is, a through hole 5b is formed in the main body 5a, and a valve body 5C is provided across the through hole 5b. This valve body 5C has the above-mentioned conduction hole 5b,! : Conductive hole 5
d is formed, and the through hole 4 is opened or closed by rotating a cock 5e provided on the valve body 5C to connect or shut off the hole 5d and the through hole 5b. .

Next, a case will be described in which the surface of the roller configured as described above is changed. Figure 2 (^) shows that by pressurizing the empty chamber 2 of the roller body 1 and expanding the roller body 1,
This is a roller shaped like a drum.

Here, the cavity 2 can be pressurized by filling the cavity 2 with pressure oil, compressed air, a melt field of a low melting point metal, etc. via the valve 5. To explain specifically the case where this method is performed using hydraulic pressure, pressure oil is obtained by a hydraulic pump 7 driven by a motor 6, this pressure oil is adjusted to a desired pressure by a pressure regulating valve 8, and then By filling the cavity 2 with the oil, the roller body 1 can be formed into a drum shape having a shape that corresponds to the adjusted pressure of the pressure oil. After filling the cavity 2 with pressure oil, the valve 5 is closed to close the through hole 4 to maintain the pressure within the cavity 2, thereby maintaining the shape of the roller body 1.

The pressure required to form the roller body 1 into a predetermined drum shape depends on the material of the roller body I, its length, outer diameter,
It is determined by dimensions such as the inner diameter.

As described above, it is also possible to form the roller body 1 into a drum-like shape by filling the cavity 2 with compressed air. In this case, compressed air is obtained by a near compressor (not shown), the compressed air is adjusted to a predetermined pressure by a pressure regulating valve, and then filled into the cavity 2 via the valve 5.

Furthermore, the roller main body 1 can be formed into a large drum shape by filling the cavity 2 with a molten metal of a low melting point that melts at about 90 degrees using a high-pressure filling device via the valve 5. Such metals include, for example, Ri: 55%, I'b: 32%,
There is a Newtonian alloy consisting of 16% Sn and the melting point of this alloy is 95°C.

1111 As described above, by pressurizing the cavity 2 of the roller body 1, it is possible to bulge the roller body 1 and form it into a drum shape, and therefore, the above-described crown roller can be easily formed. .

Further, by selecting the pressure to pressurize the cavity 2, it is easy to make the roller body 1 a straight roller.

Next, in the same figure (II), by suctioning the inside of the empty chamber 2,
A constricted portion is formed in which the diameter of the central portion of the roller body l is smaller than the diameter of both ends, thereby changing the shape of the roller into a so-called small drum shape. The surface of the roller main body 1 formed in the shape of a small drum has the same function as the combination roller in a belt conveyor in which the heald has a trough angle θ.

Suctioning the empty chamber 2 of the roller body 1 can be carried out by connecting the suction side of a known vacuum pump 9 to the empty chamber 2 via the valve 5, and then operating the vacuum pump 9. . After the interior of the cavity 2 is suctioned to form a desired drum-like shape on the roller body I, the pressure state within the cavity 2 is maintained by closing the valve 5 and closing the J hole 4, and the roller body The shape of the main body 1 is maintained.

As mentioned above, the surface shape of the roller body 1 can be changed by applying pressure or suction to the empty chamber 2 of the roller body 1, but at this time, there is a force acting on the roller body 1 in the circumferential direction. For this reason, if the shaft 3c of the shaft member 3 is provided with a stepped portion 3d shown in FIG. It is possible to support forces acting on

[Second Embodiment] FIG. 4(A) is an explanatory diagram of the roller according to this embodiment.
Figure (1'l) is a current view of this. In the figure,
The same parts and parts having the same functions as those in the first embodiment described above are given the same reference numerals, and the explanation thereof will be omitted.

In the figure, a screw stud 11 serving as a telescopic member is provided in a cavity 2 of a roller body 1. This screw thread 11 has a right-hand lead male thread lla formed on one side, and a left-hand lead male thread flb formed on the other side. Further, a four-chamfered portion lIC is formed at both ends of the threaded rod 11. A handle 12 is attached to this four-chamfered portion 11c, and the threaded rod 11 is rotated by this handle 12.

Further, the shaft member 3 is provided with female threads 3e formed to correspond to the male threads 11a and 11b. That is,
In the figure, the shaft member 3 on the left side is formed with a female thread 3Q with a right lead, and the shaft member 3 on the right side is formed with a female thread 3e with a left lead. Furthermore, relief portions 3f are formed at the ends of the female threads 3e of the shaft member 3, respectively.

In the roller configured as described above, when the handle 12 is attached to the four-chamfered portion 11c formed on the threaded rod 11 and the handle 12 is rotated to rotate the threaded rod 11, the shaft member 3 is attached to the threaded rod 11. The formed left and right lead nonola,
Due to the action of Ilb, they are brought closer to each other or separated by i\1. Therefore, compressive force or tensile force in the axial direction acts on the roller body 1, and the surface shape of the roller body 1 changes due to these forces.

Specifically, the threaded rod 11 is moved along the arrow a in FIG. 4(B).
When rotating in the direction, the shaft members 3 try to approach each other,
A compressive force acts on the roller main body 1 in the direction of the arrow a shown in FIG. When rotated in the direction of the arrow, the shaft members 3 tend to separate from each other,
A tensile force acting on the roller body 1 in the direction of the arrow shown in FIG. 1A moves, and therefore a constriction occurs at the center of the surface, giving it a small drum-like shape.

<Effects of the Invention> As explained in detail above, the roller of the present invention has a cavity inside the roller body having a flexible structure, and a through hole communicating with the cavity in at least one shaft member. The formed shaft member is fixed to both ends of the roller body, and a closing member is provided in the through hole, so that by filling the empty space of the roller body with pressure oil or compressed air through the through hole, or by By injecting molten metal under pressure and adjusting the pressure of the filling fluid or the injection pressure of the molten metal, the roller surface can be formed into a straight shape, and the center of the roller body The portion can be formed into a drum shape that bulges out from both ends. Also, by suctioning the empty space of the roller body through the through hole,
A constriction with a smaller diameter than both ends can be formed in the center of the roller to form a small drum shape.

In addition, in the roller, the shaft member is formed by a flange fixed to the roller body and a shaft having a step integrally formed with the flange, so that the axial load generated on the roller is absorbed by the thrust bearing. It can be supported by

Further, a vacant space is provided inside the flexible roller body, and an elastic member having left and right lead male screws formed at both ends is provided in this vacant space, and the male screw and the male screw are formed inside at both ends of the roller body. Since the corresponding female thread is formed and the shaft member is fixed, the shape of the roller surface can be formed into a straight shape, a drum shape, or a small drum shape by rotating the extensible member.

As mentioned above, according to the roller of the present invention, the roller surface can be formed into a drum-like shape, a small drum-like shape, or a straight shape. Alternatively, a roller for imparting a trough angle to the belt can be easily manufactured, and therefore, the manufacturing cost of the roller can be reduced. Furthermore, when a trough angle is given to the belt, the surface of the roller body becomes a smooth curve, so there is no bending of the heald, and therefore the life of the heald can be extended. It is something that you have.

[Brief explanation of the drawing]

Figure 1 (^) is a cross-sectional explanatory diagram of the first embodiment, Figure 1 (B)
2(A) and 2(B) are explanatory diagrams of the rollers with changed shapes, FIG. 3 is an explanatory diagram of the case where the rollers are supported on bearings, and FIG. 4(A), (B) is the second
An explanatory diagram of the embodiment, FIG. 5 is an explanatory diagram of a conventional example in which a trough angle is given to the heald. 1 is the roller body, 2 is the empty chamber, 3 is the shaft member, 3a is the flange, 3C is the shaft, 3d is the step, 3e is the female screw, 3r is the escape, 4 is the through hole, 5 is the valve, 7 is the hydraulic pump , 9 is a vacuum pump, 11 is a threaded rod, lla is a right lead male screw, llb is a left lead male screw, and IIC is a four-chamfered portion.

Claims (3)

[Claims] (1) A roller body that is flexible and has a cavity inside, and a shaft member fixed to both ends of the roller body, and at least one shaft member is electrically connected to the cavity of the roller body. A roller comprising: a shaft member having a through hole formed therein; and a closing member for closing the through hole formed in the shaft member. (2) The roller according to claim 1, wherein the shaft member includes a flange fixed to the roller body and a shaft integrally formed with the flange and having a stepped portion. (3) A roller body that is flexible and has a hollow space inside, and a telescopic member provided in the hollow space, with a right-hand male thread formed on one side and a left-hand male thread formed on the other side. and a shaft member fixed to both ends of the roller body and having a female screw thread formed in the center corresponding to the male screw thread formed on the telescopic member.