JPH0543026Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a lifting frame drop prevention device for an overhead type article conveying device.

(Prior art) Conventionally, as an overhead type article conveying device,
The following are known. That is, at least two rotary shafts are rotatably provided to rotate in conjunction with the traveling vehicle traveling above, and a driven wheel fitted to one of these rotary shafts and a drive shaft of a motor for the lifting frame are fitted. An endless belt such as a chain or belt is wrapped around the driven wheel,
It is known that each of the rotating shafts is provided with a required number of winding drums, and a lifting frame is provided at the lower end of a hanging belt that can be wound up and unwound onto these winding drums.

(Background of the invention) In the conventional device, if the endless band that is stretched between the driven wheel fitted to one of the rotating shafts and the drive wheel fitted to the drive shaft of the lifting frame motor breaks, all of the There was a problem in that the rotating shaft became completely free at the same time, causing the lifting frame to fall, which was extremely dangerous. This invention was made to prevent such danger.

(Example) This invention will be explained below based on two examples shown in the drawings. In this specification, the front refers to the right side of Figure 1, the rear refers to the left side of the figure, the right refers to the front side of the paper in Figure 1, and the left refers to the back side. Also,
Identical parts in the two embodiments are designated by the same reference numerals.

Embodiment 1 (See FIGS. 1 to 3) A guide rail 3 is provided on a ceiling 1 via a hanging fixture 2, and a traveling vehicle 4 is movably suspended from the guide rail 3.

A pair of front and rear rotating shafts 6 are rotatably provided on the traveling vehicle 4 by bearings 7 so that their axes are directed left and right, and an interlocking wheel 8 is fitted to the left end of these rotating shafts 6. Interlocking wheel 8
An endless belt 9 such as a chain or timing belt is stretched over the belt. A driven wheel 11 is fitted onto the right end of the rear rotating shaft 6. A driven wheel 14 is fitted onto a drive shaft 13 of a lift frame motor 12 provided on the traveling vehicle 4, and an endless belt 15 such as a chain timing belt is stretched between the drive wheel 14 and the driven wheel 11. ing. With such a configuration, by rotating the drive shaft 13, the rotating shaft 6 can be rotated.

A pair of winding drums 1 are provided on each of the rotating shafts 6.
7 are provided, and a suspension belt (including a suspension chain, etc.) 18 is provided on these winding drums 17 so as to be able to be wound up and unwound at the same time, and an elevating frame 19 is provided at the lower end of these suspension belts 18. Although not shown in the drawings, the elevating frame 19 is provided with a robot hand for holding articles. The suspension belt 1
In order to rewind 8, the rear rotating shaft 6 is rotated clockwise in FIG.

The swing lever 31 is positioned between the driving wheel 14 and the driven wheel 11 so that the swinging lever 31
This swing lever 31 is provided to be able to swing up and down.
A roller 32, which is a brake member, is provided at the free end, and this roller 32 is placed on the upper side of the endless band 15, so that in this state, the swing lever 31 is slightly inclined toward the driven wheel 11 side. is being done. The driven wheel 11
An engaging piece 34 is provided on the traveling vehicle 4 so as to form a gap 33 between the driving wheel 14 and the driven wheel 11, and the endless band 15 is cut and shaken. When the movable lever 31 swings downward, the roller 32 fits into the gap 33. When the swing lever 31 is fitted into the gap 33, the suspension belt 1
When a force is applied to pull 8 downward, the swing lever 31
is adapted to receive a force that bites into the gap 33. With such a configuration, the endless band 1
It is possible to prevent the elevating frame 19 from falling when the timer 5 breaks.

In the figure, reference numeral 35 is a stopper provided on the vehicle 4 to prevent the swing lever 31 from swinging toward the drive wheel 14.

Embodiment 2 (See FIGS. 4 and 5) A driven wheel 11 is provided so as not to rotate relative to the rotating shaft 16 but to be slidable in the axial direction. The protrusion 4 is biased towards the fixed plate 42 provided on the driven wheel 11 or the fixed plate 42.
3, a hole 44 into which a protrusion 43 is fitted is provided on the other side, a swing stopper 45 is provided on the traveling vehicle 4 so as to be swingable up and down, and a roller 46 is provided on the swing stopper 45 so as to be freely rotatable. , this roller 46 is placed on the upper side of the endless band 15, and in this state, the swing stopper 4
5, the protrusion 43 resists the force of the spring 41 and the fixing plate 4
When the endless band 15 is cut and the swing stopper 45 swings downward, the swing stopper 45 comes off from the driven wheel 11. With such a configuration, the endless band 15
When the spring 41 is cut, the protrusion 43 and the hole 44 are fitted together, and the rotation of the rotating shaft 6 is prevented.
It is possible to prevent the lifting frame 19 from falling. Note that, in place of the hole 44, an overhanging protrusion receiver that engages with the protrusion 43 may be provided.

(Effects of the invention) This invention achieves the following effects by virtue of the above-mentioned configuration.

Even if the endless band that is stretched between the driven wheel fitted to one of the rotating shafts and the drive wheel fitted to the drive shaft of the lifting frame motor breaks, the lifting frame can be prevented from falling. I can do it.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention,
Figure 1 is a side view of Example 1, Figure 2 is Figure 1-
An enlarged sectional view along the line with the middle omitted, Figure 3 is the second
4 is a side view of a main part of the second embodiment, and FIG. 5 is a plan view thereof. 4... Traveling vehicle, 6... Rotating shaft, 11... Driven wheel, 12... Lifting frame motor, 13... Drive shaft, 14... Drive wheel, 15... Endless band, 17... Winding drum , 18... Hanging belt, 19... Lifting frame, 31... Rocking lever, 3
2... Roller, 33... Gap, 34... Engaging piece, 41... Spring, 42... Fixed plate, 43... Protrusion, 44... Hole, 45... Rocking stopper, 46
……roller.

Claims (1)

[Claims for Utility Model Registration] 1. At least two rotary shafts that rotate in conjunction with each other are rotatably provided on a traveling vehicle running above, and a driven wheel fitted to one of these rotary shafts and a lifting and lowering wheel are provided. An endless belt such as a chain belt is stretched around a drive wheel fitted to the drive shaft of the frame motor, and each of the rotating shafts is provided with a required number of winding drums,
In an overhead type article conveying device in which an elevating frame is provided at the lower end of a suspension belt that can be wound up and unwound on a winding drum, the hanging belt is positioned between the driving wheel and the driven wheel. , a swinging lever is provided on the traveling vehicle so as to be able to swing up and down, a brake member is provided at the free end of the swinging lever, this brake member is placed on the upper side of the endless band, and is connected to the driven wheel. An engaging piece is provided on the traveling vehicle so as to form a gap therebetween and to be located between the driving wheel and the driven wheel, and the endless band is cut and the swinging lever swings downward. Then, the lifting frame fall prevention device of the overhead type article conveyance device is configured such that the brake member fits into the gap. 2. At least two rotating shafts are rotatably provided on the traveling vehicle traveling above and rotate in conjunction with each other, and a driven wheel is fitted onto one of these rotating shafts and a drive shaft of a motor for the lifting frame is fitted. An endless band such as a chain belt is stretched around the stopped drive wheel, and each of the rotating shafts is provided with a required number of winding drums,
In these overhead type article conveying devices in which an elevating frame is provided at the lower end of a hanging belt that can be wound up and unwound freely on a winding drum, the driven wheel does not rotate relative to the rotating shaft but rotates in the axial direction. The driven wheel is slidable, and the driven wheel is urged by a spring toward a fixed plate provided on the traveling vehicle, and a protrusion is engaged with either the driven wheel or the fixed plate, and a protrusion is engaged with the other. A swing stopper is provided on the traveling vehicle so as to be able to swing up and down, and the swing stopper is placed directly or indirectly on the upper side of the endless band. The stopper is in contact with the driven wheel so that the protrusion does not hit the protrusion receiver against the spring force, and when the endless band is cut and the swinging stopper swings downward, the swinging stopper is removed from the driven wheel. A lifting frame fall prevention device for overhead type article conveyance equipment.