JPS6410384B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of driving a trolley that travels in a straight line and transports various items over long distances.

For example, in the production of concrete piles,
The piles are 15 meters long, and the carts used to transport them are also of similar length, so it is necessary to transport the formwork and products to each process along the length.

Generally, when transferring pile formwork or products,
In order to automatically perform tasks such as pouring concrete, assembling formwork, and taking out products, it is extremely important to ensure that the concrete stops at a specified position accurately, and to avoid large vibrations during transportation after centrifugal forming. You must do so.

Conventional driving methods for making the above-mentioned cart run in a straight line include a method of towing it with a winch, a method of pulling it with a chain, and a method of installing a motor in a vehicle and making it run by itself.

First, the method of towing with the first winch is as shown in FIG. Both ends of the wire 6 suspended over 3 are connected to the trolley 1
The rotation of the pulley 5 connected to the front and rear ends of the wire 6 and driven by the motor M is controlled by operating the lever 7.
The cart 1 is made to travel by the rotation of the wheel.

However, when using the wire 6, if the moving distance is long, it is difficult to keep the wire 6 tensioned from beginning to end, and the bogie itself pulsates when traveling, making it impossible to improve the accuracy of stopping at a fixed position. be.

In addition, automation is difficult because all operations must be controlled manually.

Next, the second method of towing with a chain is a winch method in which the wire is replaced with a chain.
As with wire, due to chain flapping,
There are problems in that pulsation occurs in the running of the trolley, resulting in poor stopping accuracy and poor chain durability.

In the case of the chain method, it is possible to use a limit switch or the like to facilitate control, but since the energy of the truck is received by the chain, stopping accuracy cannot be improved.

In the self-propelled method using a third motor, as shown in Fig. 2, a speed reducer for driving wheels 8 and a motor 9 are attached to a trolley 1 that can move freely on rails 2, and the power supply to the motor 9 is carried out from the floor. This is a structure in which a power supply cable 11 drawn out from a cord reel 10 installed on a surface or attached to a trolley is connected to a motor 9.

This self-propelled method requires power supply equipment such as a cable between the trolley, which poses problems in work safety and increases running costs.Moreover, the drive mechanism is installed in a narrow area at the bottom of the trolley. The disadvantage is that maintenance is difficult.

Furthermore, since it is a self-propelled type, the only factor that affects control is the friction between the wheels and the rails, and changes in the weight of formwork A, etc. cause changes in the braking distance, causing problems such as poor stopping accuracy. be.

Furthermore, since it is a self-propelled type, it is necessary to attach the control panel 12 to the trolley 1, and in the case of manual operation, there is an inconvenience that the operator must follow the trolley.

In addition to the drive method described above, it is also possible to lay a rack on the floor and install a pinion drive mechanism on the cart that meshes with the rack, but in this case, power supply from the ground is also required. In addition, there is a problem similar to that in the case where a drive mechanism is provided at the bottom of the truck.

In addition, instead of the trolley method, there is a method of transporting formwork and products using a chain conveyor, but over long distances, the chain elongates significantly, resulting in poor stopping accuracy and the need to adjust the tension frequently. It is not practical because it requires maintenance, which increases maintenance costs.

This invention was made in order to eliminate the problems and drawbacks of the various conventional drive methods as described above, and eliminates the occurrence of pulsation when the bogie runs, ensuring reliable braking and highly accurate stopping. It is an object of the present invention to provide a driving method that can be easily controlled and improve the safety of the working environment.

The structure of the present invention is such that a rack is fixed to the truck along the moving direction, and pinions that mesh with the rack are arranged at intervals shorter than the length of the rack in the moving direction of the truck, and each pinion engages the clutch. The mechanism is linked to the drive mechanism through the mechanism, and only one pinion meshed with the rack is rotated, so that the carriage can be driven in a sequential manner.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5 of the accompanying drawings.

As shown in the figure, a rack 21 is installed at the bottom of the cart 1, which is movable along the rails 2 laid on the floor.
is fixed.

This rack 21 is parallel to the moving direction of the truck 1 and has a length substantially equal to the entire length of the truck 1.

A pinion 22 capable of meshing with the latch 21 is located between the side rails on the floor surface on which the rails 2 are laid.
The pinions 22 are arranged at regular intervals along the moving direction of the truck 1, and each pinion 22 is driven via a clutch 24 by a drive mechanism 23 using one motor.

As shown in FIGS. 4 and 5, the drive device 23 is
A rotating shaft 25 is arranged at the bottom of the rail 2 so as to be orthogonal to the rail 2, and the rotating shaft 25 and the motor 26
are constructed in conjunction with a brake 27, an intermediate sprocket 28, a reducer 29, and a coupling 30,
The rotating shaft 25 includes a pinion 22 that rotates freely,
A clutch 25 is installed to connect and disconnect the pinion 22 and rotating shaft 25 by operating a cylinder or the like.
A rack 21 of the truck 1 moving along the rail 2 is adapted to mesh with each pinion 22.

The pinions 22 are arranged at a distance slightly shorter than the length of the rack 21 of the truck 1, and the rack 21 is always connected to one or two pinions 2.
2, the pinion 22 is normally freed by the release of the clutch 24, so that the pinion 22 can smoothly engage with the clutch 21 that has entered.

Further, the clutch of the pinion that is engaged with the rack 21 connects the rotating shaft 25 and the pinion 22, and only the pinion that is engaged with the rack is rotated to move the truck 1 forward.

The present invention is implemented using a drive device having the structure shown above as an example, and the bogie 1
Since the rack 21 is always engaged with one of the pinions, only the clutch of this pinion is engaged, and the other pinions are released.

The rotation of the motor 26 is transmitted via the clutch 24 to the pinion 22 meshing with the rack 21, causing the truck 1 to travel.

Immediately before the truck 1 travels and the rear end of the rack 21 separates from the pinion, the front end of the rack 21 in the moving direction meshes with the pinion located in front.

Since this front pinion is in a free state, it meshes smoothly with the rack, and the teeth of the rack will not ride on the pinion.

The front pinion is connected to the rotating shaft 25 by the clutch 24 at the same time as it engages with the rack 21, and conversely, the rear pinion becomes free when the clutch 24 is released, so the bogie 1 is moved by the front pinion. The carriage 1 will continue to run continuously, and this state will be repeated by the number of pinions 22, so that the carriage 1 will be sequentially fed.

Furthermore, when it is desired to stop the truck 1, the brake 27 is actuated, and the braking force is transmitted to the truck 1 by the pinion 22 and the rack 21, so that the truck 1 is accurately stopped at a desired position.

Note that the carriage 1 can be moved in the opposite direction by rotating the motor 26 in the opposite direction.

As described above, since the present invention has the above configuration, it has the following effects.

(1) The rack is fixed to the trolley, and the rack is moved by meshing with the pinion placed on the floor, so there is no pulsation in the running of the trolley and no vibration is applied to the transported goods, so it is possible to Formwork and products during pile manufacturing can be transported over long distances without any problems.

(2) Since it uses a rack and pinion system, braking force is applied reliably and stopping accuracy is greatly improved.

(3) Since the drive mechanism of the trolley is located on the floor side, the power supply mechanism is not dragged around, which reduces electrical failures and improves the safety of the working environment.

(4) Since only the pinion that is engaged with the rack rotates and the others remain stationary, safety on the floor can be increased.

(5) The pinions are arranged at intervals slightly shorter than the length of the rack, and are in a free state when engaged with the rack, so that smooth engagement between the rack and pinion can be obtained, and the bogie can be connected and run smoothly. can be done.

(6) Since the trolley and drive unit are always directly connected, control is easy, and counter control can also be used.

[Brief explanation of drawings]

FIG. 1 is a front view showing a winch pulling method in a conventional trolley driving method, FIG. 2 is a front view of a self-propelled method using a motor, FIG. 3 is a front view showing a driving method of the present invention, and FIG. FIG. 5 is an enlarged vertical cross-sectional view of the main parts of the same as above, and is a layout diagram of the drive mechanism part in the above. 1... Trolley, 2... Rail, 21... Rack,
22... Pinion, 23... Drive mechanism, 24...
Clutch, 26...motor, 27...brake.

Claims (1)

[Claims] 1. Attach a rack along the moving direction to a trolley that can move freely along the rail, and attach a pinion that can mesh with the rack on the rail laying floor surface in the moving direction of the trolley at a distance shorter than the length of the rack. Each pinion is connected to the drive mechanism via a clutch so that it can rotate freely, and only the pinion that is engaged with the rack is driven to rotate while it is engaged with the rack. A method for driving a linear transport trolley, which is characterized by running a linear transport trolley.