JPH0710458A - Trolley having drop preventing guide roller - Google Patents

Abstract

PURPOSE:To surely prevent a trolley from dropping, by arranging a pair of left and right side plates on which drop-preventing guide rollers adapted to roll on opposite sides of the lower flange of a rail of a trolley frame are shaft- supported, on opposite sides of a rail on which a running wheel rolls at the lower flange thereof. CONSTITUTION:A trolley frame is constituted on opposite sides of a rail 3 having an I-like cross-sectional shape. Side plates 12, 12 coupled together at their center lower parts by means of a coupling shaft 14 are laid, drop- preventing guide rollers 7 each having a drop-preventing upper flange 6 are located in recesses 15 formed in the side plates 12 at both front and rear ends thereof, and are rotatably supported by vertical shafts 8 which are supported by upper and lower bearing fixtures 17, 9 fixed to the side plates 12 by means of bolts 16, 18. The lower bearing fixture 9 is formed so that its inner side plate is located in the vicinity of a lower extension line of the inner peripheral edge of the guide roller 7. Further, a pair of running wheels 2 provided with driven gears are pivoted on both front and rear sides of the intermediate part of the side plates 12, and are driven by a drive device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article conveying trolley having a fall preventing guide roller.

[0002]

2. Description of the Related Art Conventionally, as a trolley having a fall prevention device, one disclosed in Japanese Patent Publication No. 52-34294 is known.

[0003]

In the case of the trolley having the above-described conventional fall prevention device, when the rail is curved, the left and right fall prevention devices are not evenly engaged with the rail, and one of the fall prevention devices is dropped. If the prevention device is extremely deviated in the direction of coming off the rail, the trolley may fall off the rail even though the trolley is provided with the fall prevention device.

[0004]

In order to advantageously solve the above-mentioned problems, in a trolley having a fall prevention guide roller of the present invention, a plurality of traveling wheels 2 mounted on a trolley frame 1 and a rail 3 are provided. Fall prevention which is placed on the lower flange 4 of the rail 3 and is arranged near the upper surface of the lower flange 4 of the rail 3 on the upper portion of the guide roller 5 which is close to and opposed to both ends of the lower flange 4 in the width direction. A fall prevention guide roller 7 is provided by providing a flange 6 for use, and the lower portion of the vertical axis 8 that rotatably supports the fall prevention guide roller 7 is supported by a lower bearing fitting 9 fixed to the trolley frame 1. The inner side surface 10 of the lower bearing fitting 9 is arranged near the downward extension line of the inner peripheral edge 11 of the guide roller 5.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The drawings show an embodiment of the present invention.
On both left and right sides of the rail 3 extending in the front-rear direction, the side plates 12,
13 are arranged, the lower central portions of the side plates 12 and 13 are connected by a connecting shaft 14, and the trolley frame 1 is configured. 15 is provided, and the fall prevention guide roller 7 including the guide roller 5 and the fall prevention flange 6 integrally provided on the upper portion of the guide roller 5 is provided in each recess 1
5, the lower end of the vertical axis 8 that rotatably supports each of the fall prevention guide rollers 7 has a lower bearing fitting 9 engaged with the inner surfaces of the side plates 12 and 13 and the lower surface of the recess 15.
Is rotatably fitted in the upper part of the lower bearing fitting 9, and the lower bearing fitting 9 is fixed to the side plates 12 and 13 by a plurality of bolts 16. The bearing fitting 23 fitted in the fall prevention guide roller 7 is rotatably fitted in the vertical axis 8.

The upper end of the vertical axis 8 is engaged with the inner surfaces of the side plates 12 and 13 and the upper surface of the recess 15 to form the upper bearing fitting 1.
7, which is rotatably fitted in the lower part of
Are fixed to the side plates 12 and 13 by a plurality of bolts 18.

A pair of traveling wheels 2 provided with driven gears 19 are rotatably mounted on the front and rear sides of the middle portion of the side plate 12, and below the central portion of the side plate 12,
A drive device 20 composed of an electric motor with a reduction gear is fixed, and a drive gear 21 fixed to an output shaft of the drive device 20 is meshed with each driven gear 19.

A pair of traveling wheels 2 are rotatably mounted on the front and rear sides of an intermediate portion of the side plate 13, each traveling wheel 2 is mounted on a lower flange 4 of a rail 3, and each guide roller 5 is mounted on the rail 3. In close proximity to the side surface of the lower flange 4 and the lower surface of the fall prevention flange 6 faces the upper surface of the lower flange 4 with a small gap, and the inner side surface 10 of the lower bearing fitting 9 is The guide metal roller 5 is arranged near the downward extension line of the inner peripheral edge 11 of the guide roller 5, and a hanging metal fitting 22 of the transported object is hung on the intermediate portion of the connecting shaft 14.

[0009]

According to the present invention, a plurality of traveling wheels 2 mounted on the trolley frame 1 are placed on the lower flange 4 of the rail 3 and are arranged close to both ends of the lower flange 4 in the width direction. On the upper part of the guide roller 5 facing each other, a fall prevention flange 6 arranged near the upper surface of the lower flange 4 of the rail 3 is provided to constitute a fall prevention guide roller 7. The fall prevention guide roller The lower part of the vertical axis 8 that rotatably supports 7 is supported by a lower bearing fitting 9 fixed to the trolley frame 1, and the inner side surface 10 of the lower bearing fitting 9 is below the inner peripheral edge 11 of the guide roller 5. Since the trolley is arranged near the extension line, when the traveling rail 3 falls, it can be reliably prevented by a simple means. Even when the rail 3 is curved, the fall prevention flanges 6 of the left and right fall prevention guide rollers 7 should be arranged so as to face the lower flange 4 of the rail 3 with an even width. Therefore, even when the trolley runs on the curved portion of the rail 3, it is possible to reliably prevent the trolley from falling from the rail 3.

[Brief description of drawings]

FIG. 1 is a side view showing a trolley having a fall prevention guide roller according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional plan view showing a trolley having a fall prevention guide roller according to an embodiment of the present invention.

FIG. 3 is a cross-sectional plan view showing a part of FIG. 2 in an enlarged manner.

FIG. 4 is a side view showing a part of FIG. 1 in an enlarged manner.

FIG. 5 is a vertical sectional front view showing a trolley having a fall prevention guide roller according to an embodiment of the present invention.

FIG. 6 is a vertical sectional front view showing a part of FIG. 5 in an enlarged manner.

FIG. 7 is a partial cross-sectional plan view showing a state where a trolley having a fall prevention guide roller according to an embodiment of the present invention is mounted on a curved portion of a rail.

FIG. 8 is a side view showing a lower bearing fitting used in an embodiment of the present invention.

FIG. 9 is a plan view showing a lower bearing fitting.

FIG. 10 is a vertical sectional front view showing a lower bearing fitting.

FIG. 11 is a side view showing an upper bearing fitting used in an embodiment of the present invention.

FIG. 12 is a bottom view showing the upper bearing fitting.

FIG. 13 is a vertical sectional front view showing an upper bearing fitting.

FIG. 14 is a vertical sectional front view showing a fall prevention guide roller fitted with bearing fittings.

15 is a plan view of the fall prevention guide roller shown in FIG. 14. FIG.

[Explanation of symbols]

 1 Trolley Frame 2 Travel Wheel 3 Rail 4 Lower Flange 5 Guide Roller 6 Fall Prevention Flange 7 Fall Prevention Guide Roller 8 Vertical Axis 9 Lower Bearing Metal Fitting 10 Side 11 Inner Edge 12 Side Plate 13 Side Plate 14 Connecting Shaft 15 Recess 16 Bolt 17 Top Bearing metal fittings 18 Bolts 19 Driven gears 20 Drive gears 21 Drive gears 22 Hanging fittings 23 Bearing metal fittings

Claims (1)

[Claims] 1. A plurality of traveling wheels 2 mounted on a trolley frame 1 are mounted on a lower flange 4 of a rail 3, and guide rollers 5 of a guide roller 5 facing each other in the width direction of both ends of the lower flange 4 are opposed to each other. A fall prevention flange 6 is provided on the upper portion of the rail 3 in the vicinity of the upper surface of the lower flange 4 to form a fall prevention guide roller 7, and the fall prevention guide roller 7 is rotatably supported. The lower part of the vertical axis 8 is supported by a lower bearing fitting 9 fixed to the trolley frame 1, and an inner side surface 10 of the lower bearing fitting 9 is supported.
Is a trolley having a fall prevention guide roller arranged near the downward extension line of the inner peripheral edge 11 of the guide roller 5.