JPS6033700B2 - Trolley turning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cart turning device in which the turning radius of a cart pulled and driven by a pusher conveyor is made as small as possible.

BACKGROUND ART Dollys conventionally used on automobile assembly lines and the like are pulled and driven by pusher conveyors, and fixed running wheels are attached to the front, rear, left and right sides of a rectangular underframe that is long in the front and back direction.

Many traversers are installed on automobile assembly lines to change the direction of carts, and when swivel wheels are used instead of fixed wheels, the wheels can rotate freely. Although it is possible to turn the cart within a narrow plane, the transfer using the traverser becomes unstable, making it difficult to reliably change direction. On the other hand, when using fixed wheels, it is easy and reliable to change the direction of the cart using the traverser, but it is difficult to operate the traverser in a high-temperature atmosphere such as in a drying oven. It is difficult to make a U-turn within a plane. In addition, when changing the direction of the cart using the traverser, the front and rear postures of the cart are reversed, that is, the front part of the cart on the entrance side becomes the rear part on the exit side and moves forward, which makes it easier for later work in the flow of the assembly line. This results in problems. The present invention eliminates the above-mentioned conventional drawbacks by making it possible to change the direction of the truck using a traverser, and also to make a U-turn, that is, turn, without changing the front-rear attitude of the truck within a narrow plane space. To explain the drawings below, Fig. 1 is a plan view of the cart turning route, in which 1 is a pusher conveyor that can be bent vertically and horizontally, 2 is a guide rail, 3 is a locking device release cam plate, and 4 is a locking device locking cam plate. , G are truck attitude correction guide plates, which are arranged along the truck rotation path.

FIG. 2 is a plan view of the bogie on the bogie turning route shown in FIG. The moving frame 7 is the pivot 8
Rear wheels 9 are fixed to the left and right sides of the rotating frame body 7, and vertical punches 10, which protrude back and forth in the direction of movement of the trolley across the underframe 5, are mounted at both ends. A member 1 equipped with a collision prevention mechanism and a mechanism for engaging and disengaging with a trolley traction drive conveyor
1 and 11' are provided, and a bogie attitude adjustment roller 12 is attached to the rear of the vertical village 10. Note that the pivot shaft 8 of the rotating frame 7 may be provided in the vertical shaft 10. Or, in order to smooth the rotation of the rotating frame 7,
There is no problem even if the rolling roller 13 is provided in the. A bracket 14 as shown in FIG. 4 is provided at the rear outer end of the underframe 5, and a lock pin 16 is suspended from one end of a crank member 15 bearing on the bracket 14. A cam roller 17 is provided at the end of the crank member 15 and abuts against the locking device release cam plate 3. Further, at the front and rear outer ends of the underframe 5, guide rollers 8 are provided which are guided to a predetermined cart turning path by the guide rail 2, and furthermore, at the front part of the underframe 5, guide rollers 8 are provided to guide the cart to a predetermined turning path. A pusher plate 19 is mounted which engages a pusher dog (not shown) of a pusher conveyor which is guided in a channel-shaped rail disposed along the pusher conveyor. When the cart that has been towed by the pusher conveyor and engaged by the pusher plate 19 reaches the entrance of the cart turning path shown in FIG. 1, the guide roller 18 attached to the underframe
is guided by contacting the guide rail 2, and the cam roller 17 provided on the underframe is pushed down by the locking device release cam plate 3 to push the lock pin 16 through the lock pin insertion hole of the rotating frame 7.
The rotating frame 7, which had been fixed by the insertion of 16, was removed.
can be rotated freely around the axis 8.

Therefore, the rear wheel 9 fixed to the rotating frame 7 acts as a flexible wheel with respect to the underframe 5. In addition, since the grooved rail guiding the pusher conveyor 1 is raised on the trolley rotation path, the lower end of the busher plate 19 is supported by the pusher conveyor, and the front wheel 4 of the trolley lightly touches or slightly touches the floor. It's surfacing. In such a state, the trolley is pulled and driven by a pusher conveyor, so even if the front wheels are fixed, there will be no sliding friction with the floor when the trolley rotates, and the rear wheels are free wheels, so the trolley will not rotate. When moving, it always deflects in the turning direction and transfers to the floor surface without causing sliding friction.

Therefore, the cart is pulled and driven by the pusher conveyor lightly and smoothly along a path restricted by the turning path of the guide rail 2, and turns with a small turning radius regulated by the guide rail 2.

When the truck reaches the exit of the turning route, the truck posture correction roller 12 attached to the vertical direction is guided by the truck posture correction guide plate G to return the rotation frame 7 to the normal position and lock the lock pin. The insertion hole is aligned with the axis of the lock pin 16, and the cam roller 17 is disengaged from the locking device release cam plate 3, engages with the locking device locking cam plate 4, and is pushed up, so that the lock pin 16 is inserted into the lock pin insertion hole. Rotating frame 7
is fixed to the underframe 5.

Therefore, since the rear wheels 9 are fixed wheels, they are also suitable for changing direction using a traverser. As described above, in the present invention, when the bogie is normally running, both the front and rear wheels become fixed wheels, ensuring smooth direction changes of the traverser, etc., and when turning, the front wheel slightly rises or lightly touches the floor. Since the pusher plate is supported by a pusher conveyor and the rear wheels are made of free wheels, the truck can be rotated along a predetermined turning path, make a U-turn with a radius of curvature, and maintain the forward and backward posture of the truck with the minimum turning area. It can be turned without conversion, and the direction can also be changed using a traverser with a single cart.
It has the excellent effect that direction change by U-turn can also be performed within the minimum required area.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main part of the cart turning path, FIG. 2 is a plan view of the cart in the turning path, FIG. 3 is a side view of the cart, and FIG. 4 is an enlarged plan view of the locking device. 1... Bump conveyor, 2... Guide rail, 3... Lock device release cam plate, 5...
...Underframe, 6...Front wheel theory, 7...Rotating frame, 9...Rear wheel, 16...Lock pin, 1
7... Force roller, 18""" guide roller, 19...
...Pusher plate. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A bogie having a front wheel fixed to the underframe of the bogie, a rear wheel fixed to a rotating frame rotatably connected to the underframe, and a locking device fixing the rotating frame to the underframe. a guide rail that guides guide rollers provided on the front and rear sides of the underframe of the truck and has a predetermined truck rotation path; and a pusher dog that engages with a pusher plate provided on the front part of the underframe. a pusher conveyor guided on a bottom-raising rail that tows and drives the truck along the truck turning path and raises the front wheels of the truck slightly above the floor surface in the turning path; A trolley turning device comprising a cam plate for releasing and holding the device.