JPS6156129B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for high-speed conveyance of a bogie sent from another conveyance path over a certain distance, and is capable of smooth high-speed conveyance of the bogie by suppressing shocks when starting and stopping at high speed. be.

Conventionally, in a reciprocating conveyor having a pusher dog that pushes a pusher plate protruding from a cart, a retainer dog is provided opposite the pusher dog to prevent the cart from overrunning or running away, and the pusher dog and retainer dog are placed on opposite sides. The dog can be raised and lowered and is biased in the upright direction, and a pusher plate is interposed between the tips of both dogs during upright conveyance. It is desirable that the distance between the tips of the two dogs be as narrow as possible in order to minimize the movement of the truck due to kinetic inertia during transportation of the truck. However, it is also necessary to maintain a distance so that the tips of the two dogs do not interfere with each other when the two dogs are raised or lowered to opposite sides.

In view of this consideration, the distance between the tips of both dogs when they are generally raised is widened to the extent that some movement of the pusher plate can be tolerated. Therefore, when the pusher dog pushes the pusher plate to stop the truck being transported, the truck moves over due to the kinetic inertia of the truck, causing the pusher plate to separate from the pusher dog. When starting the bogie at high speed in this condition, the pusher dog collides with the pusher plate first, and due to the repulsion, the pusher plate collides with the retainer dog, causing the pusher plate to repeatedly move between the pusher dog and the retainer dog. Conventionally, it has been avoided to rapidly convey a truck sent from another conveyance path at high speed, since this would result in a reciprocating collision and give a large impact to the truck and the reciprocating conveyor.

Therefore, when various types of work are performed on a line such as an automobile assembly line, quickly transporting the car body from one work process to the next work process greatly helps in improving work efficiency. Not only that, but despite the advantages such as being able to allocate the time required for transportation to work time within a limited time, it is difficult to transport carts at high speeds for the reasons mentioned above. Ta.

The present invention solves the above-mentioned problems and facilitates high-speed conveyance of carts.An embodiment of the present invention will be described below based on the drawings. A plurality of bogie pushing devices C ₁ and C ₂ are attached, and both ends of a chain 2 suspended via a guide wheel around a pulley driven by a prime mover M are tied to both ends of the reciprocating conveyor 1, respectively, The reciprocating conveyor 1 is reciprocated on the guide rail R by the forward/reverse rotation control of the prime mover M, and the pusher dog 3 and the retainer dog 4 are placed on opposite sides of the bogie pushing device C (details of its structure will be described later). When the dogs 3 and 4 are raised, the distance between the tips of the dogs 3 and 4 is such that it does not interfere with the raising and lowering operation of the retainer dog 4. A pusher plate 6 protruding from the lower front surface is movably interposed, and the retainer dog 4
A first cam rail 8 that holds the retainer dog 4 lying down by coming into contact with cam pins 7 protruding from both sides is installed along the low-speed running section L of the bogie pushing device, and a high-speed conveyor rail 8 connected to the low-speed running section L is provided. Along the section H, a second cam rail 9 is provided which comes into contact with the cam pin 7 to hold the retainer dog 4 upright during the forward journey of the reciprocating conveyor 1, and holds the retainer dog 4 down during the return journey, and the second cam rail 9 is provided at both ends of the high speed conveyance section H. is provided with switch rails 10, 10' whose vertical movement is controlled in order to switch the raising and lowering posture of the retainer dog 4, and an explanatory diagram of the raising and lowering operation during reciprocating movement of the retainer dog 4 is described, and a diagram of the raising and lowering operation when the retainer dog 4 is reciprocated is described. The fixed position stop device S is detailed in FIG. 2 and is not shown in FIG.

FIG. 2 explains the operation of the fixed position stopper device S of the truck. On the floor F at the installation position of the switch rails 10, 10', there are left and right pushers located on the rear lower surface of the truck at the positions where the switch rails 10, 10' are installed. (In order to avoid interference between the pusher plate and the stop pad dog 12 described later when the bogie moves forward) A pair of L-shaped stop pad dogs 12 and 12' are attached to hold the protruding stop pad 11, and the front stop pad dog 12 is placed on the floor. It is supported so that it can be raised and lowered by being biased to lie down in a fixed position on the surface, and the rear stop pad 1
2' is attached to the rear part of the slider 13 which moves back and forth by a cylinder device and is biased to stand up so that it can freely fall forward and backward, and when the trolley 5 is pushed by the pusher dog 3, the stopper plate 11 is moved to the stopper dog 12'.
When the switch rail 10 is tilted forward and stopped between the front and rear stop pad dogs 12 and 12' on the installation position of the switch rail 10, the cylinder device is activated and the slider 13 moves forward, and the lever piece of the front stop pad dog 12 is placed on the front upper surface of the slider 13. By riding on the truck, the front stop pad 12 rotates and is held upright, so the slider 13 moves forward and the front stop pad 12, which is held in the upright position by the rear stop pad 12', moves forward.
The slider is stopped by pushing the stopper plate 11 until it comes into contact with the L-shaped stopper dogs 12 and 12' from the front and back directions without any movement, and the slider is held at a fixed position without overtravelling. to stop. The slider actuating cylinder device is controlled by known means.

Therefore, the operation of the present invention will be explained with reference to FIGS. 1a, b, c, d, and e.
As shown in FIG. 2, when the reciprocating conveyor 1 for high-speed conveyance reaches the standby position of the truck pushing device C ₁ , the retainer dog 4 of the truck pushing device _C 1 is held down by the first cam rail 8 . Therefore, the pusher dog 3 can be easily moved forward without being obstructed by the retainer dog 4, so that the carriage pushing device C ₁
The pusher plate 6 of the truck 5 sent from the rear of the truck can move the pusher dog 3 forward and stop at a position in front of the pusher dog 3, and can also be sent from the side of the truck pushing device. Since the carriage has a retainer dog 4 or is lying down, the pusher plate 6 can be easily positioned in front of the pusher dog 3.

Next, the prime mover M is driven at low speed to push the trolley
C ₁ is advanced together with the cart to the high-speed start position of the switch rail 10 as shown in FIG. 1b and then stopped, and the slider 13 is advanced from the state shown in FIG. 2a to the state shown in FIG. When the front stop pad 12 is held upright, the pusher plate 6 of the truck overruns due to the kinetic inertia of the truck even after the prime mover M has stopped, and the stop plate 11 collides with the front stop pad 12, then rebounds and stops. However, the slider 13 is further advanced and the rear stopper dog 12' presses and clamps the repulsed and retreated stopper plate 11 against the upright front stopper dog 12, thereby moving the carriage 5 to a predetermined position, that is, the pusher plate 6. is stopped at a position where it abuts against the pusher dog 3 without any free movement gap.

On the other hand, the reciprocating conveyor 1 also overtravels due to its kinetic inertia, but since the pusher dog 3 is attached via the shock damper 15 as will be described later in FIG. 5 from the home position, the overtravel is absorbed by the shock damper 15, and the push dog 3 maintains its contact with the push plate 6.

In the above embodiment, the trolley 5 sent from another transport path is transported at low speed to the high-speed transport start position by the trolley pushing device that runs at low speed, but instead of using the trolley pushing device, a separate The cart may be transported at a low speed to the high speed transport start position by other means for transporting the transport vehicle, such as a cylinder device, a feeder, or a feed device of a traverse device.

Next, when the switch rails 10, 10' are moved upward by the known means shown in FIG. 4 to a position where they are connected to the retainer dog upright holding rail of the second cam rail 9 as shown in FIG.
stands up and interposes the pusher plate 6 between it and the pusher dog 3.

Next, when the slider 13 is moved back and the front stop dog 12 is released from the restrained state as shown in FIG.

In this state, the prime mover M is driven at high speed to suddenly start the reciprocating conveyor 1 at high speed, and the cart 5 is conveyed to the destination point at high speed in a short time as shown in FIG. 5 to stop at the desired location. At this time, pusher plate 6
Due to the kinetic inertia of the carriage 5, the carriage 5 overruns and collides with the retainer dog 4, but since the retainer dog 4 is attached via the shock damper 15, the impact can be absorbed.

A switch rail 10' and a bogie fixed position stopper device S which operate in the same manner as at the high-speed start position are also provided at the destination point, and when the bogie is stopped, the switch rail 10' is first moved to the retainer dog of the cam rail 9 of 2. Move the retainer dog 4 down to the position where it connects to the lodging holding rail, and then
The slider 13 moves forward and clamps the stopper plate 6 of the truck with a pair of opposed stop pad dogs to stop the truck at a fixed position.

Next, when the prime mover M is driven in the reverse direction, the reciprocating conveyor 1 returns to the low-speed starting position as shown in FIG. Expect.

Since the reciprocating conveyor 1 shown in FIG. 1 is equipped with two cart pushing devices C ₁ and C ₂ ,
The high-speed conveyance section following the low-speed conveyance section is divided into two, and the distance between the switch rail placed at the divided position and the switch rail at the high-speed start position, and the distance between the switch rail at the high-speed conveyance completion position is determined by the distance between the two trolley pushers. The spacing between the advancing devices _C1 and _C2 is made equal to the interval between the advancing devices C1 and C2. Therefore, the leading bogie at the splitting position and the following bogie at the high-speed starting position are simultaneously conveyed at high speed by one reciprocating motion of the reciprocating conveyor 1. Therefore, the number of carts that can be simultaneously transported at high speed can be increased in proportion to the number of cart pushing devices attached to the reciprocating conveyor.

FIG. 3 shows details of the bogie pushing device C, in which the reciprocating conveyor 1 includes a plurality of wheels W1 running on a guide rail R and anti-lateral vibration wheels W _' guided by the upper and lower side edges of the rail R. ₁ , the reciprocating conveyor 1
A main body 14 of a bogie pushing device C is mounted on the reciprocating conveyor 1 so as to be movable relative to the reciprocating conveyor 1 with a shock damper 15 interposed between the main body 14 and the reciprocating conveyor 1. A coil spring 16 is tensioned to return the main body 1 to its original position.
4 has a plurality of wheels running on the front guide rail R.
W ₂ and wheels W' ₂ for preventing lateral vibration guided by the upper and lower edges of the guide rail R are attached. Also,
A retainer dog 4 and a pusher dog 3 are mounted on brackets provided separately at the front and rear parts of the main body 14, respectively.
and are biased to stand up by a spring and are attached to opposite sides so as to be able to freely rise and fall.
The tip of the retainer dog 4 is formed flat to ensure that the pusher plate 6 of the truck 5 is pushed forward.
The tip of the retainer dog 4 forms an arcuate surface to facilitate lodging even when the pusher dog 3 is in an upright state, and the top of the tip of the retainer dog 4 is located at a slightly lower position than the top of the tip of the pusher dog 3 when standing up.
The distance between the tips of the pusher dog 3 and the retainer dog 4 is narrowed to such an extent that the pusher plate 6 of the truck is interposed so that they can be moved slightly back and forth. As mentioned above, the retainer dog 4 is guided by the first and second cam rails 8 and 9, and the switch rail 1
A cam pin 7 that can be moved up and down by pins 0 and 10' is provided in a protruding manner.

The reciprocating conveyor 1 may be a single piece as shown in FIG. 1, or alternatively connected by connecting rods 17 as shown in FIG.

FIG. 4 is a side view of the switch rails 10, 10' that move the cam pin 7 of the retainer dog 4 up and down, as well as the fixed position stopper device S.
A pusher plate 6 is provided at the center of the lower surface of the
The cam pins 7, 7 protruding from both sides of the retainer dog 4 attached to the cart pushing device C on the reciprocating conveyor 1 as shown in FIG. 3 are connected to the lifter device 1.
8, the reciprocating conveyor 1 is moved up and down by switch rails 10, 10 installed on both sides of the reciprocating conveyor 1 and attached to lifting rods 19, 19, to an upward movement position shown by a solid line and a downward movement position shown by an imaginary line. As shown in FIG. 1, the retainer dog 4 is switched between the lying holding rail and the standing holding rail.

In addition, 20 is a guide receiving rail of the chain 2. A stopper plate 11 is provided on the lower side of the truck 5, and is operated by stopper dogs 12, 12' as detailed in FIG. 2.

Therefore, the pusher plate 6 of the pusher plate 6 of the pusher dog 3 is always in contact with the front end surface of the pusher dog 3 without any gap when the trolley 5 sent from another conveyance path and the trolley 5 stopped at the split position are started at high speed. Therefore, even if the reciprocating conveyor 1 suddenly starts at high speed, the pusher dog 3 immediately pushes the pusher plate 6 and starts moving forward at high speed without causing a collision between the pusher plate 6 and the pusher dog 3. Because the motion can be transmitted, the trolley can smoothly start suddenly at high speed. Furthermore, even in the event of a sudden stop, the retainer dog 4 receives the pusher plate 6 via the shock damper 15, so that the cart can be stopped without impact.

In this way, the time required for transporting the trolleys can be reduced and the work time can be increased by transporting the trolleys over a certain section at high speed, as mentioned above, which improves work efficiency on the line where various tasks are performed. When a reciprocating conveyor is equipped with one trolley pushing device, it is possible to transport each trolley at high speed in a tact, and it is possible to transport one trolley at a time. when,
A large number of carts can be transported simultaneously at high speed in a single reciprocating motion of the reciprocating conveyor, which significantly improves the cart transport efficiency.

[Brief explanation of the drawing]

The drawings show embodiments of the invention, FIGS. 1a, b,
c, d, and e are the retreat position, high-speed start position, and high-speed start start position of the bogie push device when two bogie push devices are attached to the reciprocating conveyor, respectively;
An explanatory diagram of the operation at the high-speed conveyance completion position and the backward start position. Figure 2 a, b and c are explanatory diagrams of the operation of the carriage fixed position stopper device at the retreat position, forward position and stop position. Figure 3 is an illustration of the operation of the carriage pushing device. FIG. 4 is a partially sectional side view illustrating the operation of the switch rail. 1...Reciprocating conveyor, 3...Pushing dog, 4...Retainer dog, 5...Dolly, 6...
pusher plate, 7...cam pin, 8...first
cam rail, 9...Second cam rail, 10...
...Switch rail, 11...Stopper plate,
S...Fixed position stopper device, L...Low speed transport section, H...High speed transport section.

Claims (1)

[Claims] 1. A trolley pushing device is provided which has a pusher dog and a retainer dog which stand up opposite each other in the front and back with a pusher plate provided on the trolley running on the floor interposed therebetween and are attached to opposite sides of each other so as to be able to freely raise and lower. In addition, there is a low-speed traveling zone drive in which the vehicle reciprocates along the guide rail and travels at low speed to the high-speed transportation start position of the bogie on the outward journey, and a high-speed conveyance zone drive which is connected to the low-speed traveling zone and pushes the bogie at high speed with the pusher dog. a reciprocating conveyor that is drive-controlled; a first cam rail that holds the retainer dog lying down in the low-speed traveling section; and a first cam rail that holds the retainer dog upright during the forward movement of the reciprocating conveyor in the high-speed conveyance section and pushes the pusher plate. a second cam rail that is sandwiched between the second cam rail and the second cam rail that holds only the retainer dog in a reclined position during the return trip; and a switch rail that switches the up and down posture of the retainer dog at both ends of the high-speed conveyance section;
A fixed position stopper device for stopping the truck at the switch rail position without separating the pusher plate of the truck from the pusher dog.