JPH065289Y2 - Conveyor rotor support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rotary body made of a synthetic resin, such as a roller conveyor roller of a roller conveyor or a belt conveyor roller of a belt conveyor, which is also made of synthetic resin and is made of a pipe. The present invention relates to a rotating body supporting device of a conveyor that rotatably supports a frame configured by joining together.

[Conventional technology]

Conventionally, as a rotary member supporting device for this type of conveyor, for example, a device described in Japanese Utility Model Laid-Open No. Sho 63-177316 is known.

As shown in FIG. 8 exemplifying a roller conveyor roller as a rotating body, the conveyor rotating body supporting device is made of a synthetic resin base member 3 fixed to face a frame 2 formed by joining pipes 1. (Only one is shown in the drawing) and a base member 3 which is detachably inserted from above and below and a synthetic resin (for example, nylon 66) is attached to the end of the pipe 4.
A support shaft 8 for rotatably supporting a roller conveyor roller 6 formed by fitting an end cap 5 made of ultra-high molecular weight polyethylene) into a shaft hole 7 of the end cap 5.
And a support shaft member 9 made of a synthetic resin, which is provided so as to project horizontally (diameter 10 mm).

Pipes 1 and 4 are on the surface of a thin steel pipe with a thickness of 0.7 mm
Approximately 1 mm in thickness coated with AAS or other synthetic resin
It is a resin-coated steel pipe of about 32 mm.

The base member 3 is formed by injection molding AAS resin,
A mounting portion 11 that has a C-shaped fixing portion 10 that can be attached to the pipe 1 and that has a support shaft member 9 attached to the outside of the fixing portion 10.
The mounting portion 11 has an engaging groove 12 in the shape of a bottomed bag in the vertical direction and the supporting shaft 8 of the supporting shaft member 9 so that the engaging groove 12 is opened outward. And a rectangular notch 13.

On the other hand, the support shaft member 9 is formed by injection-molding so-called engineering plastic such as polyacetal, has a multi-stage plate shape that engages with the engagement groove 12 and the notch portion 13, and the support shaft 8 is provided to project. Engagement part 14 and mounting part of base member 3
It is composed of a lid portion 15 for closing the upper portion of 11.

Reference numeral 16 in the figure denotes a rectangular locking hole provided at the bottom of the engaging groove 12 of the mounting portion 11 of the base member 3, and cooperates with the retaining projection 17 provided below the engaging portion 14 of the support shaft member 9. Constitutes a locking mechanism.

The base member 3 is attached to the pipe 1 so that the engaging groove 12 extends in the vertical direction, and then bonded and fixed using a resin adhesive.

[Problems to be solved by the device]

However, in the above conventional rotary body supporting device for a conveyor, since both the support shaft member and the rotary body are made of synthetic resin, when used for a free roller conveyor (gravity roller conveyor) which does not drive the rotary body, Although the temperature rise due to the friction of is not so large and it can be used in an actual machine, when it is used in a drive roller conveyor that drives and rotates a rotating body, the temperature rise due to the friction between the two causes the sliding contact surface of the rotating body to move. It increases in proportion to the increase of the peripheral speed and the load on the rotating body, and it is easy to keep the operation temperature of synthetic resin (for example, -10 ℃ to 80 ℃ for AAS resin).
There is a problem that the driven rotating body becomes unrotatable due to its deformation or melting, and it becomes difficult to use it in an actual machine.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rotary body supporting device for a conveyor, which suppresses a temperature rise due to friction between a support shaft member made of a synthetic resin and a driven rotary body and which can be used in an actual machine.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a rotary member supporting device of a conveyor of the present invention comprises a base member fixed to a frame formed by joining pipes, and a driven member made of synthetic resin, which is detachably mounted on the base member. A rotary body supporting device for a conveyor comprising a support shaft member made of a synthetic resin having a support shaft for rotatably supporting a rotary body, the cooling pipe being provided in the pipe of the frame so as to be able to supply cooling air. The shaft center portion of the support shaft member is provided with an air supply hole for supplying cooling air to the inner peripheral surface of the shaft hole of the driven rotating body supported on the support shaft or the outer peripheral surface of the shaft,
In addition, the pipe and the base member are provided with ventilation holes that connect the inside of the pipe and the air supply hole.

It is preferable to form an axial or spiral groove on either the outer peripheral surface of the support shaft, the inner peripheral surface of the air supply hole, the inner peripheral surface of the shaft hole of the driven rotating body, or the outer peripheral surface of the shaft.

[Action]

In the above-mentioned means, cooling air is generated between the outer peripheral surface of the support shaft and the inner peripheral surface of the shaft hole of the driven rotating body or the inner peripheral surface of the air supply hole of the support shaft and the outer peripheral surface of the shaft of the driven rotating body. It flows out from the gap, and the outer peripheral surface of the support shaft or the inner peripheral surface of the air supply hole and the inner peripheral surface of the shaft hole of the driven rotary member or the outer peripheral surface of the shaft is cooled by the cooling air.

By forming the groove in the axial direction or the spiral shape, the flow of the cooling air is improved.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In the following description, the same components as those shown in FIG. 8 will be assigned the same reference numerals and the description thereof will be omitted.

1, 2, and 3 are an exploded perspective view, a plan view, and a vertical cross-sectional view, respectively, of a rotary body supporting device for a drive roller conveyor according to the first embodiment.

In the rotor support device for the drive roller conveyor of this embodiment, the base member 3 fixed to the pipe 1 of the frame 2 is provided with a vent hole that is opened substantially at the center of the engaging groove 12 of the mounting portion 11.
18 is provided so as to penetrate the fixing portion 10, and this ventilation hole 18
Is communicated with the inside of the pipe 1 of the frame 2 to which cooling air is sent, as will be described later, through a vent hole 19 provided in the peripheral wall of the pipe 1.

On the other hand, at the axial center portion of the support shaft 8 of the support shaft member 9, cooling air is applied to the inner peripheral surface of the shaft hole 7 of the roller conveyor roller 6 which is a driven rotating body rotatably supported by the support shaft 8. An air supply hole 20 to be supplied is provided so as to penetrate the engaging portion 14, and the air supply hole 20 is provided.
Is communicated with the ventilation hole 18 with the support shaft member 9 mounted on the base member 3.

A pulley portion 22 provided with a plurality of belt grooves 21 is provided at one outer end portion of an end cap 5 (only one is shown in each figure) inserted into both ends of the pipe 4 of the roller conveyor roller 6. Round belts 23, 24 are formed integrally with each other, and the belt groove 21 of the pulley portion 22 is looped around the roller conveyor roller 6, the drive pulley described later, and an adjacent roller conveyor roller.

FIG. 4 is a perspective view in which a part of the drive roller conveyor provided with the above-described rotating body supporting device is omitted.

In the figure, 25 is a drive pulley made of synthetic resin for driving the roller conveyor roller 6 via a round belt 23, and a spline drive shaft 27 rotatably supported on one side of the frame 2 via a bearing 26 made of synthetic resin. Is fitted to the spline drive shaft
27 is connected to a rotary drive device (not shown).

Reference numeral 28 denotes an elbow serving as a supply mouthpiece attached to an end of the pipe 1 which constitutes a roller frame portion of the frame 2, and is appropriately connected to an air pressure source (not shown).

The pipe 1 of the frame 2 has a synthetic resin joint 29a,
The spline drive shaft 27 is formed by coating the surface of a thin steel pipe with a synthetic resin in a spline shape.

By using the drive roller conveyor having the above-mentioned configuration, cooling air having a pressure of 1 kg / cm ² is constantly supplied from the air pressure source, and the peripheral speed of the shaft hole 7 of the end cap 5 of the roller conveyor roller 6 is changed by the operation of the rotary drive device. Temperature rise of the inner peripheral surface of the shaft hole 7 of the end cap 5 when the speed is increased from 3 m / min by 3 m / min for every 30 minutes of operation (on the outer peripheral surface of the support shaft 8 of the support shaft member 9). (Measurement) is shown by a polygonal line A in FIG. 5, while the temperature rise of the outer peripheral surface of the support shaft 8 when the same operation is performed without supplying the cooling air is shown by a polygonal line B in the same figure. Became.

The weight of the roller conveyor roller 6 is 250 g.

Therefore, when cooling air is not supplied, the peripheral speed is 24m / min.
However, if the operating temperature exceeds the upper limit (70 ° C) of the actual use temperature of ultra-high molecular weight polyethylene (LUB), it becomes difficult to operate, but when cooling air is supplied, as shown by the arrow in Fig. 3, the cooling air is piped. It is discharged into the shaft hole 7 of the end cap 5 through the ventilation holes 19 and 18 and the air supply hole 20 from inside 1, and flows out through the gap between the outer peripheral surface of the support shaft 8 and the inner peripheral surface of the shaft hole 7 to cool both surfaces. However, it can be seen that the temperature rise due to friction between the two can be significantly suppressed.

Further, using the above drive roller conveyor, cooling air having a pressure of 1 kg / cm ² is constantly supplied from an air pressure source, and the peripheral speed of the shaft hole 7 of the end cap 5 of the roller conveyor roller 6 is set to 9 m by the operation of the rotary drive device. / Min, and the load per roller conveyor roller 6 is increased from the load of 2 kg by 2 kg every 30 minutes of operation time, the temperature rise of the inner peripheral surface of the shaft hole 7 of the end cap 5 (Measured on the outer peripheral surface of the support shaft 8 of the support shaft member 9) is as shown by the polygonal line C in FIG. 6, while the outer peripheral surface of the support shaft 8 when the same operation is performed without supplying cooling air. The temperature rise of No. 1 became as shown by the polygonal line D in the figure.

Therefore, when cooling air is not supplied, the peripheral speed is 9 m / min.
If the load per unit is around 12 kg in the above operation, it will be difficult to operate because the upper limit of the actual operating temperature will be exceeded, but if cooling air is supplied, even if the load per unit is 16 kg, the actual operating temperature will be It can be seen that the temperature can be suppressed below the upper limit.

FIG. 7 is a vertical cross-sectional view of the rotary body supporting device of the drive roller conveyor of the second embodiment.

In this embodiment, an axial groove 30 is provided on the inner peripheral surface of the shaft hole 7 of the end cap 5 of the roller conveyor roller 6 to improve the cooling air flow and further improve the cooling efficiency. .

Since other configurations and operational effects are similar to those of the first embodiment, the same components are given the same reference numerals and the description thereof is omitted.

In each of the above embodiments, the driven rotary body is the roller conveyor roller of the drive roller conveyor, but the driven rotary body may be the belt conveyor roller of the belt conveyor or the like.

Further, the shaft of the driven member is not limited to be inserted into the shaft hole of the driven member rotating body, but the shaft of the driven member may be inserted into the air supply hole of the support member.

Further, the groove for improving the flow of the cooling air is not limited to the axial direction but may be a spiral shape, and is not limited to the inner peripheral surface of the shaft hole, but the outer peripheral surface of the support shaft and the shaft of the driven rotating body. It may be provided on either the outer peripheral surface of the above or the inner peripheral surface of the air supply hole of the support shaft.

[Effect of device]

As described above, according to the present invention, the cooling air has a gap between the outer peripheral surface of the support shaft and the inner peripheral surface of the shaft hole of the driven rotary body or the inner peripheral surface of the air supply hole of the support shaft and the shaft of the driven rotary body. Out of the gap with the outer peripheral surface of the spindle, and the outer peripheral surface of the support shaft or the inner peripheral surface of the air supply hole and the inner peripheral surface of the shaft hole of the driven rotating body or the outer peripheral surface of the shaft is cooled by the cooling air. The temperature rise due to friction between the support shaft member and the driven rotating body can be greatly suppressed, and there is no deformation or melting unlike the conventional one, and it can be used as a drive roller conveyor for a synthetic resin rotating body supporting device. Can be used for actual use.

Further, since the dust adhering to the sliding surface between the support shaft member and the driven rotating body is removed by the cooling air, the wear of both can be reduced, and the lubricant, lubricating oil, etc. can be contained in the cooling air. By mixing, it is possible to further reduce wear.

Further, by forming the axial or spiral groove, the flow of the cooling air is improved, so that the cooling efficiency can be further improved.

[Brief description of drawings]

FIGS. 1 to 7 show an embodiment of the present invention, and FIGS.
FIG. 3 and FIG. 3 are an exploded perspective view, a plan view and a vertical sectional view, respectively, of a rotary body supporting device for a drive roller conveyor according to the first embodiment, and FIG. 4 omits a part of the drive roller conveyor equipped with the above device. FIGS. 5 and 6 are explanatory views showing the relationship between the temperature of the outer peripheral surface of the support shaft and the peripheral speed and the relationship between the temperature of the outer peripheral surface of the support shaft and the load of the apparatus of the first embodiment. 7 is the second
FIG. 8 is a longitudinal sectional view of a rotary body supporting device for a drive roller conveyor according to an embodiment, and FIG. 8 is an exploded perspective view of a conventional rotary body supporting device for a conveyor. 1 ... Pipe, 2 ... Frame 3 ... Base member 6 ... Roller conveyor roller 8 ... Support shaft, 9 ... Support member 18, 19 ... Vent hole, 20 ... Air supply hole 28 ... Elbow, 30 ... groove

Claims (2)

[Scope of utility model registration request] 1. A base member fixed to a frame formed by joining pipes, and a support shaft which is detachably mounted on the base member and rotatably supports a driven rotating body made of synthetic resin. A rotary member supporting device for a conveyor, which comprises a support shaft member made of synthetic resin described above, wherein cooling air can be supplied to the pipe of the frame while the shaft center of the support shaft of the support shaft member is A supply hole for supplying cooling air is provided on the inner peripheral surface of the shaft hole or the outer peripheral surface of the shaft of the driven rotating body supported by the support shaft, and the pipe and the base member communicate the inside of the pipe with the supply hole. An apparatus for supporting a rotating body of a conveyor, which is provided with a ventilation hole. 2. The rotating body supporting device for a conveyor according to claim 1, wherein either the outer peripheral surface of the support shaft or the inner peripheral surface of the air supply hole, or the inner peripheral surface of the shaft hole of the driven rotating body or the outer peripheral surface of the shaft. An apparatus for supporting a rotating body of a conveyor, characterized in that an axial or spiral groove is formed in the.