JPH0432328Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention involves rotating a flexible belt wrapped in a spiral slope around a rotating drum by the rotation of the rotating drum, and handling objects such as food with the flexible belt. The present invention relates to a spiral conveyor device that performs airflow processing such as cooling, heating, and drying during conveyance, and particularly relates to the configuration of a belt support mechanism that allows a flexible belt to move smoothly.

(Prior art) In order to move the flexible belt of a spiral conveyor device lightly and smoothly, the inner and outer rails that slidably support both sides of the flexible belt have a property of having a low coefficient of friction. A sliding material has been used conventionally, and the structure is known, for example, as shown in FIG. 5 of Japanese Utility Model Application Publication No. 51-29356.

(Problem to be solved by the invention) The conventional sliding material consists of inner rails 6' and outer rails 7' made of metal of a predetermined length and extending between columns 9 distributed evenly around the rotating drum. A sliding material 15 as a covering material of the same length is fitted into the upper surface part, and is attached to each pillar 9 via a horizontal stay 8 in units of a predetermined length between the pillars 9, as shown in FIGS. As shown in FIG.

Such a belt support mechanism requires the above-mentioned rail units equal to the number of divisions around the rotating drum and the number of stages of the flexible belt.For example, if the rail unit is divided into four sections and has 18 stages, it is natural that 72 units are required. However, there was a problem in that a lot of man-hours and time were consumed in assembling each unit and attaching it to the support column 9, which increased the cost of the device.

In view of these circumstances, the present invention allows the rail core material and the rail sheath material as a sliding material to be easily and continuously manufactured integrally by means such as extrusion molding, and has a unique cross-sectional shape. By making the mounting groove on the stay side have a unique cross-sectional shape, we aim to unify the belt support rail in the spiral conveyor device and simplify the installation, thereby providing a low-cost device. It is something.

(Means for Solving the Problems) Therefore, in the present invention, both side edges of the flexible belt 3 wound around the rotating drum 1 in a spiral slope shape are received by the horizontal stays 8 attached to the pillars 9 with single support. In a spiral conveyor device that is slidably supported by an inner rail 6 and an outer rail 7 that are in the shape of a spiral rope, a rail core material 10 made of a metal round bar and a cylindrical portion that is covered with and tightly adheres to the rail core material 10 are used. 12 and a angular convex strip 13 with a rectangular cross section that extends and protrudes from the cylindrical portion 12 in the axial direction.
The side rails 6 and 7 are formed by a rail sheath material 11 made of synthetic resin integrally having Notched circular dovetail groove 1
4, and the inner rail 6 and the outer rail 7 are inserted into the dovetail groove 14.

(Function) By using a belt support mechanism that is an integral structure of the rail core material 10 having rigidity and the rail sheath material 11 as a sliding material, it is possible to manufacture a long object with a constant cross-sectional shape, and the spiral It is possible to unify the entire length of the conveyor or to reduce the number of conveyors to the minimum number of divisions.

Further, when assembling the both side rails 6, 7 to the horizontal stay 8, a simple method such as press-fitting into the dovetail groove 14 is sufficient, so that the assembling can be performed easily and quickly.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

The device shown in FIG. 1 is a low temperature freezing device according to an example of the present invention, and includes a rotating drum 1 that stands vertically and rotates around a central axis 5, and a cylinder that is arranged concentrically with and surrounding this drum 1. A flexible belt 3 is interposed in the space between 2 and 2, and this belt 3 is wound around the rotating drum 1 in a spiral slope shape.
The belt 3 is spirally rotated in the upward direction by the rotation of the rotary drum 1, and this conveyor device is disposed inside the heat-insulating processing chamber 4 to carry the products loaded on the belt 3 and being transferred. , cooled, heated or dried.

In this device, a spirally rotating flexible belt 3 is supported by an inner rail 6 and an outer rail 7, and both rails 6, 7 are supported by a support 9 via a horizontal stay 8.

A plurality of the above-mentioned supports 9 are arranged upright and distributed equally around the flexible belt 3, and the above-mentioned horizontal stays 8 are fixed to the supports 9 with single support.

As shown in cross section in FIG. 3, the inner rail 6 and the outer rail 7 are comprised of a rail core material 10 made of a metal round bar, and a rail sheath made of synthetic resin that covers and adheres to the rail core material 10. It can be easily integrally molded by, for example, continuously covering the rail core material 10 with a predetermined shape of rail sheath material 11 by extrusion molding means while drawing out the rail core material 10. This is commonly done in the electric wire manufacturing process.

The rail sheath material 11 includes a cylindrical portion 12 having a predetermined thickness that closely surrounds the rail core material 10, and a angular convex strip portion 13 extending in the axial direction and protruding from the surface of the cylindrical portion 12 and having a rectangular cross section. It is formed in one piece.

In the inner rail 6 and outer rail 7 configured in this manner, the angular convex strips 13 of the rail sheath material 11 come into contact with the lower surface of the side edge of the flexible belt 3, and serve as members capable of supporting the flexible belt 3 with a low coefficient of friction.

On the other hand, the horizontal stay 8 that supports the rails 6 and 7 on both sides
As shown in FIG. 3, dovetail grooves 14 are hollowed out from the upper surfaces of the stays at the support points of each rail 6, 7, respectively.

This dovetail groove 14 has a notched circular cross section with a circular arc surface corresponding to an arc of more than half the circumference of the cylindrical portion 12 in the rail sheath material 11, and if the rails 6 and 7 on both sides are strongly pushed in from the upper surface, Dovetail groove 14
Although the width of the opening is smaller than the outer diameter of the cylindrical portion 12, the elasticity of the rail sheath material 11 makes it possible to press-fit the rail sheath material 11, and thus it can be inserted and fixed into the dovetail groove 14.

The inner rail 6, outer rail 7, and horizontal stay 8 having the above-described structure can be formed by forming both rails 6 and 7 into a single helical coil, or by forming the necessary minimum number of equal-length segments. After fitting the required number of horizontal stays 8 into both rails 6 and 7 from the ends into the dovetail grooves 14, the horizontal stays 8 are fixed to the corresponding supports 9, respectively. This makes it easy to assemble the belt support mechanism.

In addition, FIG. 4 shows the main parts of another embodiment of the present invention, in which the rail sheath material 11 is connected to the cylindrical part 12,
It has a structure in which a pair of angular protrusions 13 extending in the axial direction are protruded at radially symmetrical positions around the cylindrical portion 12, and on the other hand, the dovetail groove 14 of the horizontal stay 8
Also, a square groove into which the square protrusion 13 can be inserted is additionally provided at the bottom of the groove, and one of the square protrusions 13 and the square groove in the dovetail groove 14 fit together. Due to the mating relationship, both rails 6 and 7
This has the advantage of being able to exert sufficient resistance against the torsional force applied to the flexible belt 3, thereby preventing the flexible belt 3 from wobbling laterally.

Further, the opening width dimension of the dovetail groove 14 may be larger or smaller than the outer diameter of the rail core material 10.

(Effect of the invention) In the present invention, the inner rail 6 and the outer rail 7 are formed by an integral structure of the rail core material 10 and the rail sheath material 11 as a sliding material, while the rail sheath material 11 is attached to the horizontal stay 8. By providing the dovetail groove 14 that can be press-fitted from the top or inserted from the side, the rails 6, 7 and the horizontal stay 8 can be assembled by simply fitting them together, and no fixing means such as welding or screwing is required. Therefore, it is easy to assemble.

Furthermore, since the inner rail 6 and the outer rail 7 can have a long structure, assembly to the support column 9 can be performed quickly and easily with less man-hours and processing time.

[Brief explanation of drawings]

Fig. 1 is an elevational view showing the main part of an example of the device of the present invention, Fig. 2 is an enlarged partial view of the flexible belt support in Fig. 1, and Fig. 3 is a sectional view of the main part in Fig. 2; FIG. 4 is a sectional view of a main part according to another embodiment of the present invention, FIG. 5 is a partial plan view of a belt support in a conventional spiral conveyor device, and FIG. 6 is a sectional view taken along the line A-A in FIG. be. 1... Rotating drum, 3... Flexible belt, 6... Inner rail, 7... Outer rail, 8...
...Horizontal stay, 9... Support, 10... Rail core material,
11...Rail sheath material, 12...Cylindrical part, 13...
Corner protruding portion, 14...Dovetail groove.

Claims (1)

[Scope of utility model registration request] Both side edges of a flexible belt 3 wound around a rotating drum 1 in a spiral slope shape are received by a horizontal stay 8 attached to a column 9 with single support, and slid by an inner rail 6 and an outer rail 7 forming a spiral coil shape. In the spiral conveyor device, the rail core material 10 is made of a metal round bar.
and a rail sheath material 11 made of synthetic resin that integrally has a cylindrical portion 12 that covers and adheres to the rail core material 10 and a angular convex strip 13 with a rectangular cross section that extends and protrudes from the cylindrical portion 12 in the axial direction. While the both side rails 6 and 7 are formed by the horizontal stay 8,
A dovetail groove 14 having a notched circular cross section and having an arcuate surface corresponding to the arc of the circumference of the cylindrical portion 12 is provided, and the inner rail 6 and the outer rail 7 are inserted into the dovetail groove 14. Spiral conveyor equipment.