JPH0113001Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a trolley stopping device for a trolley conveyor.

In a trolley conveyor where the pusher dog of the trolley running on the rail engages and disengages with the pusher on the drive chain side to move and stop the trolley, when stopping the trolley, push down the pusher dog at the stop position to release the engagement with the chain pusher. A stopping device is then provided for stopping the coasting trolley by means of a stopper. As a conventional stopping device of this type, JP-A-55-
In the device disclosed in Japanese Patent No. 35706, when the stop lever is lowered to the stop operating position, a cam slope of the lever pushes down a pin protruding from the pusher dog to separate the dog from the chain pusher.
A hook provided at the tip of the lever then engages the pin to stop the coasting trolley.
However, in the above conventional structure, the dog is biased by a weight to stand up in the direction of engagement with the chain pusher, so when the lever is raised when the trolley is started, the pin rises together with the hook, causing the dog to engage with the chain pusher. It is necessary to take preventive measures to prevent dangerous jamming in which the dog engages with the chain pusher before it comes off, or to increase the vertical distance between the drive chain and the trolley, which increases costs. There are drawbacks.

An object of the present invention is to provide a trolley stop device for a trolley conveyor that eliminates the above-mentioned conventional drawbacks and has a simpler structure.

Therefore, in this proposal, in order to disengage the trolley-side dog from engagement with the chain pusher, a lever is provided to push down the dog protruding pin as in the past, but after said disengagement, the trolley, which coasts, is fixed to a fixed member such as a trolley rail. The pin is stopped by being stopped by a stopped stopper, and in the stopped state, the lever simply holds down the pin from above so that the pin does not come out of engagement with the stopper.

An illustrated embodiment of the present invention will be described below. 1st
In FIG. 2, the drive chain 1 is the roller 2.
It is suspended on the upper rail 3 and moves in the direction of the arrow, and has a pusher 4. The trolley 5 is constructed by connecting front and rear carriers 5a and 5b, which are suspended on a lower rail 7 by rollers 6, with a load bar (not shown), and engages the pusher 4 by moving a pusher dog 8 provided on the upper part of the front carrier 5a up and down. Get out, move, and stop. 9 is a vertical guide roller provided on the carrier 5a, and 10 is a carrier anti-swinging member provided at the trolley stop position.

Connect the rear end of the pusher dog 8 to the retainer dog 11.
At the same time, the pusher dog 8 is pivotally supported on the carrier frame 12 by a pin 13, and the intermediate portion of the pusher dog 8 is attached to the frame 1.
A link 16 connects the weight lever 15 to the rear end of the weight lever 15 which is pivotally supported at the lower part of the weight lever 2 by a pin 14. This urges the dog 8 to rise to a position where its tip engages with the pusher 4, and fixes the pin 17 projecting to both sides at the tip of the dog 8. The retainer dog 11 stands up at a position where it engages with the rear surface of the pusher 4 due to its own weight.

At the trolley stop position, attach the rear end of the stop lever 19 to the fixed support frame 18 of the rails 3, 7 with the pin 2.
0, and in the operating position shown by the solid line on the lower surface of the lever 19, a slope 21 tilts forward and downward, followed by a sliding surface 2 parallel to the rail 7.
A cushion rubber 23 for cushioning and supporting the tip of the sliding surface 22 when the lever 19 is lowered, and a stopper 24 close to the sliding surface 22 at the rear thereof are fixed on the rail 7.

The upper end of an air cylinder 26 is pivotally supported by a bracket 25 attached to the support frame 18, and the lever 19 is held by the air cylinder 26 via a pin 27 in an operating position shown by a solid line and an inoperative position shown by a chain line. 2
8 is an air unit.

When the dog 8 is engaged with the pusher 4 and the trolley 5 is moving forward, the pin 17 is in the position 17a, and if the lever 19 is in the inoperative position at that time, the pin 17a passes under the lever slope 21. , the trolley passes by without stopping. However, if the lever 19 is in the operating position, the pin 17a will come into contact with the lever slope 21 and be pushed down, and the dog 8 will separate from the pusher 4. Next, the trolley 5 moves forward while decelerating with the pin 17 pressed down by the sliding surface 22, and when the pin 17 hits the stopper 24, the trolley stops. In the above-mentioned stopping operation, the lever 19 simply pushes down the pin 17 and does not bear the force of stopping the coasting of the trolley, which is advantageous in terms of strength and can be made compact.

To start the trolley 5, the lever 19 can be raised. When the lever 19 is raised, the dog 8 is raised by the weight lever 15. In this case, so that the pin 17 can easily separate from the abutting surface 29 of the stopper 24, the abutting surface 29 is provided with an escape slope (angle .theta.) in the tangential direction of a circle approximately centered on the pin 13. Even with this slope, the upward force generated when the pin 17 collides with the stopper 24 is so small that it does not affect the strength of the lever 19. When the tip of the lever 19 rises by more than the diameter of the pin 17, the pin 17 is released from the lever 19 in the trolley moving direction, so the trolley starts as soon as the dog 8 engages the pusher 4, unlike the above-mentioned in the conventional device. No biting occurs. Therefore, no measures are required to prevent this biting.

FIGS. 3 and 4 show an embodiment that includes other means for securing the lever 19 in the actuated position without relying on the air cylinder 26. In this embodiment, the lever 19 is normally stopped at the operating position by hitting the stopper 30 due to its own weight. A solenoid magnet 31 is attached to the support frame 18 on the side of the lever 19 in the operating position, and the plunger 32 is configured to be able to move forward and backward into the lock hole 33 of the lever 19. When the trolley is not stopped, the plunger 32 may be moved backward, and as the trolley moves forward, the pin 17 in the raised position hits the slope 21 and pushes up the lever 19 to pass. After passing, the lever 19 is lowered to the operating position. To stop the trolley, the magnet 31 is energized, the plunger 32 is inserted into the lock hole 33, and the lever 19 is locked in the operating position.

5 and 6 show an embodiment in which the lever 19 is locked in the operating position by a torque motor. In place of the pin 20 that pivotally supports the lever 19, a torque motor 35 is attached to the support frame 18 with a bracket 34, and the rear end of the lever 19 is fixed to the rotating shaft 36. When the torque motor 35 is de-energized, the lever 19 hits the stopper 30 and is stopped at the operating position, and the trolley passes as in the embodiment of FIG. When energized, the lever 19 is locked in the actuated position and the trolley is stopped. An electromagnetic brake may be used instead of the torque motor 35.

As a means for locking the lever 19 in the operating position, any suitable well-known means may be used in addition to the above.

The present invention has the above-mentioned configuration, and when stopping the trolley, the pin sliding contact surface of the lever in the operating position and the stopper close to the tip end are used to stop the pin fixed to the pusher dog on the trolley side, respectively. Since the lever is locked, the lever can be made smaller and lighter, and there is no harmful jamming between the lever, the pusher dog, and the pusher when the trolley is started, thereby making it possible to shorten the distance between the drive chain and the trolley rail. This has the effect of reducing the cost of the entire trolley conveyor.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway elevational view of one embodiment of the present invention, Fig. 2 is a side view, and Figs. 3 and 4 are elevational and side views showing main parts of other embodiments, respectively. , Figure 5,
FIG. 6 is an elevation view and a side view, respectively, showing essential parts of still another embodiment. DESCRIPTION OF SYMBOLS 1... Drive chain, 3... Rail, 4... Pusher, 5... Trolley, 8... Pusher dog, 17... Fixing pin, 18... Fixing member, 19
... Lever, 21 ... Slope, 22 ... Pin sliding contact surface, 24 ... Fixed stopper, 26, 31, 35 ...
...Lock device, 29...Pin contact surface.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A stopping device for a trolley conveyor, which is equipped with a pusher dog that can be engaged with and detached from a pusher provided on a drive chain on a trolley guided on a rail and is biased in the engagement direction, The rear end of the trolley in the moving direction is pivoted to the fixed member so as to be able to swing up and down, and the lower surface has a slope that engages with a fixing pin of the pusher dog to separate the pusher dog from the pusher when the trolley is lowered to the operating position; a lever formed with a pin sliding contact surface that is held in the operating position; a fixed stopper that locks the pin in proximity to the tip of the pin sliding contact surface in the operating position; and a locking device that secures the lever in the operating position. A trolley stopping device for a trolley conveyor, characterized in that it has. (2) A trolley stopping device for a trolley conveyor according to claim 1, wherein the pin contacting surface of the stopper is provided with an escape slope for the pin.