JPS637986B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a roller that abuts on a drive shaft supported along the transportation path of the transportation vehicle.
The roller is arranged in such a manner that its axis is oblique to the axis of the drive shaft, so that the conveyor is propelled. The object is to enable automatic stopping at a stop position set during a moving route selectively and with high positional accuracy.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below based on the attached illustrative drawings. Reference numeral 1 denotes a transport vehicle, and a pair of left and right guide rails 2 and 3 are laid along the movement route.
Horizontal shaft rollers 4 to ride on are provided at the four corners, and vertical shaft rollers 5 which sandwich the guide rail 3 on one side from both sides are provided at two locations, front and rear. 6 is transport vehicle 1
It is a chain conveyor installed in the transverse direction on the top, and is driven by the motor 7 on the conveyor cart 1, and transfers the objects to be conveyed via the conveyor platform (pallets, etc.) 8 to the conveyor installed on the floor. pass between.
Reference numeral 9 denotes a drive shaft supported on the floor at a central position between the guide rails 2 and 3 in parallel with the guide rails 2 and 3. 10 is a horizontal shaft roller that presses against the drive shaft 9 from above;
A support frame 11 that pivotally supports the transport vehicle 1 is pivotally supported at the bottom of the transport vehicle 1 so as to be rotatable around a vertical shaft 12 . 13
is a movable cam rail whose outer end is connected to the vertical axis 1
cam rail members 18 for mutually interlocking movement, which are pivotally supported at the front and rear of the bottom of the carrier vehicle 1 at 4 and 15, and are connected by a long hole 16 and a vertical shaft 17 that fits therein, with the thin inner end portions stacked one above the other; and a backward cam rail member 19. For example, by protruding from the transport vehicle 1 a stopper pin 21 that loosely fits into an elongated hole 20 provided in the cam rail member 19, it is possible to move beyond the extension limit position a shown in FIG. It is configured so that it does not rotate outward. In addition, both cam rail members 18, 1
In order to prevent the inner end of the cam rail member 9 from sagging, the transport vehicle 1 is provided with a trolley that is movable in left and right transverse directions, and the inner end of the cam rail member is suspended from the trolley via the vertical shaft 17. I can do things. In this case, the length of the travel path of the trolley can be limited and the stopper pin 21 can be omitted.

The support frame 11 of the roller 10 has a vertical shaft 1
cam driven roller 22 at a position away from 2
is supported by a vertical shaft, and the support frame 11 is biased by a tension coil spring 23 in a direction in which the roller 22 comes into contact with the back surface of the cam rail member 19, as shown in FIG. When the movable cam rail 13 is at the limit position a, the roller 10 has its axis aligned with the axis of the drive shaft 9.
It is configured to take a driven posture b inclined at an angle of 45 degrees.

Reference numeral 24 denotes a check stopper provided at the bottom of the transport vehicle 1, and includes a pair of front and rear check pieces 28, which are pivotally supported by vertical shafts 25 and 26 and held in a locking position by a tension coil spring 27. Consists of 29,
These check pieces 28 and 29 are connected to the movable cam rail 13.
It is located one step higher than the

Reference numeral 30 denotes a trolley stopping means provided at the transport vehicle stopping position A, which includes a roller 34 pivoted by a vertical shaft 33 to the tip of a lever 32 pivotally supported by a vertical shaft 31, and a lever 35 interlocked with the lever 32. The roller 34 is connected to the movable cam rail 1 via
3 and the movable cam rail 13
The lower half of the roller 34 constitutes an operating tool 34a that acts on the movable cam rail 13, and the upper half constitutes the non-returning position. It constitutes a locked tool 34b that is locked to the stopper 24. By changing the height of the lever 32, it is also possible to pivotally support the operating tool roller and the locked tool roller above and below the lever 32. and can be pivoted to separate levers that interlock with each other. A slider that moves linearly may be used in place of the wheel or lever.

Next, the method of use and operation will be explained. As shown in FIG. 1, when the roller 10 of the transport vehicle 1 is held in the driven position b by the tension coil spring 23, when the drive shaft 9 rotates in the direction of the arrow 37. A thrust in the direction of arrow 38, that is, in the forward direction, is applied to the transport vehicle 1 via the rollers 10, and the transport vehicle 1 moves forward while the rollers 10 rotate. When the carriage 1 is to pass through the stop position A, the carriage stop means 3 at the stop position A is
0 roller 34 is set at a retracted position d where it does not act on the movable cam rail 13. Transport trolley 1
When stopping at the stop position A, the roller 3
4, that is, the operating tool 34a and the locked tool 34b are switched to the operating position c. As a result, the lower half of the roller 34 (operating tool 34a) comes into contact with the forward cam rail member 18 of the movable cam rail 13 of the transport vehicle 1 moving forward, and as the transport vehicle 1 moves forward, the cam rail member 18 is moved inside. Press and swing in the direction. Therefore, since the reverse cam rail member 19 also swings inward in conjunction with the cam follower 19, the roller 10 moves in the direction indicated by the dotted line in FIG. 39
rotate in the direction.

When the transport vehicle 1 reaches the stop position A,
As shown in FIG. 4, the roller 34 reaches the inner end of the cam rail members 18, 19, and these cam rail members 18, 19 switch from the extension limit position a (FIG. 1) to the retraction limit position e, and the roller 10 has been switched to an idle rotation attitude f in which its axis is parallel to the axis of the drive shaft 9. Therefore, even if the drive shaft 9 rotates in the direction of the arrow 37, the rollers 10 simply rotate freely, and no thrust acts on the carrier 1 in either the forward or backward directions, and the carrier 1 stops. on the other hand,
The upper half of the roller 34, that is, the locked tool 34b,
When the carriage 1 reaches the stop position A, one of the non-return pieces 28 of the non-return stopper 24 is moved by the spring 27.
The transport carriage 1 is accurately fixed at the stop position A because it is pushed away against the force and fitted between the front and rear check pieces 28 and 29. In this state, an object to be transported is transferred between the chain conveyor 6 of the transport vehicle 1 and the fixed conveyor connected thereto.

When starting the transport vehicle 1, the switching means 3
6 moves the roller 34 to the retracted position d, causes the locked tool 34b to escape laterally from between the pair of front and rear check pieces 28 and 29 of the check stopper 24, and moves the operating tool 34a from the movable cam rail 13. By moving the movable cam rail 13 apart, both the front and rear cam rail members 18 and 19 of the movable cam rail 13 swing outward under the force of the tension coil spring 23 via the roller support frame 11 and the cam driven roller 22.
At the same time as returning to the limit position a, the roller 10 returns from the idle rotation position f to the driven position b. Therefore, the carrier 1 receives thrust again and moves forward.

By rotating the drive shaft 9 in the opposite direction, the transport vehicle 1
receives thrust in the opposite direction and moves backward. In this case, the lower half of the roller 34, that is, the operating tool 34a
acts on the backward cam rail member 19 to switch the roller 10 to the idle rotation position f, and the upper half of the roller 34, that is, the locked tool 34b pushes away the check piece 29 and moves between the check pieces 28 and 29. get stuck in.

The device of the present invention can be implemented and used as in the embodiments described above, and can automatically stop the transport vehicle at a specific stop position without stopping the drive shaft 9, regardless of whether it is moving forward or backward. Not only this, but also the carriage can be accurately stopped and fixed at a predetermined stop position by the automatic fitting of the locked tool 34b and the non-return stopper 24. Furthermore, the fixing release when starting the transport vehicle can be automatically performed in conjunction with the movement of the operating tool 34a to return the roller 10 to the driven position b, and to move the locked tool 34b. No special measures are required.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a side view of the carrier, and FIG. 3 is a front view of FIG. 1.
FIG. 4 is a cross-sectional plan view of the main parts for explaining the state when the transport vehicle is stopped. DESCRIPTION OF SYMBOLS 1... Transport vehicle, 9... Drive shaft, 10... Roller, 13... Movable cam rail, 18... Cam rail member for forward movement, 19... Cam rail member for backward movement, 22... Cam driven roller, 23, 27... …
Tension coil spring, 24...Return stopper, 2
8, 29... Check piece, 34... Roller, 34a
... Operating tool (lower half of roller 34), 34b...
...Operated tool (upper half of roller 34), 36...
switching means.

Claims (1)

[Claims] 1. In an apparatus in which a drive shaft is arranged along the movement path of a transport vehicle, and a roller 10 pivotally supported on the transport vehicle obliquely faces the drive shaft, the front end of the forward cam rail member 18 and the reverse cam rail member are attached to the transport vehicle. The rear end of the movable cam rail 19 is swingably supported, and the free ends are connected to each other so as to move in conjunction with each other to form a mountain-shaped movable cam rail 13. A roller support frame 11 interlocked with the cam rail 13 is provided in order to switch the roller to an idle rotation position in which the axis is parallel to the drive shaft or separated from the drive shaft when the roller swings to the bogie stop position. , an operation capable of switching the movable cam rail 13 between an operating position c in which the roller 10 moves to a state in which it switches to an idling position as the truck moves, and a retracted position d in which it does not come into contact with the movable cam rail 13. Tool 34a
, a switching means 36, and a locked tool 34b that switches between an operating position c and a retracted position d in conjunction with the operating tool 34a, and the transport vehicle is provided with a locking tool 34b that switches between an operating position c and a retracted position d. The locking tool 34b is provided with a non-return stopper 24 that is automatically engaged when the roller 10 is switched to the free rotation position, and the non-return stopper 24 is automatically engaged when the locked tool 34b moves to the retracted position d. A conveying device using a conveying cart configured to escape from the stopper 24 laterally.