JPS5816453Y2 - Trolley speed control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a truck speed control device for controlling the running speed of a truck in a truck-based article conveyance device having a drive system using frictional force.

2. Description of the Related Art In transporting articles using a trolley, it is already known that a friction drive wheel is attached to the trolley and the friction drive wheel is rotated to cause the trolley to travel at an appropriate speed.

Conventionally, when trying to control the speed of each truck simultaneously by using multiple friction-driven trucks of this type, f
Speed Tj was carried out at f1M.

That is, in areas where it is necessary to control the speed of bogies traveling in succession on the same running path, a device for controlling the direction of the friction drive wheels of each bogie is separately installed at a position corresponding to each bogie. .

However, controlling the speed of each truck separately requires a complicated speed control mechanism, lacks control reliability, and makes it difficult to make each truck travel at the same speed.

Therefore, recently, as a solution to the above-mentioned drawbacks, a plurality of drive wheel connecting bars C arranged parallel to the traveling direction of the truck a are connected to the friction drive wheels attached to each truck a, as shown in Fig. 1. A method of controlling the speed of the bogies at the same time is to apply the front end of the driving wheel connecting bar C of each succeeding bogie a to the rear surface of the preceding bogie a in sequence, thereby controlling the angle of the friction drive wheel connected to the connecting bar C. It has been considered to make θ the same for all bogies a.

Based on this new concept, there is an advantage that by controlling the speed of the leading cart a, the speeds of the following carts a can also be sequentially controlled to be constant.

However, when trying to keep the distance S between the bogies a constant regardless of the running speed, the following problem may occur.

That is, the length of the drive wheel connecting bar C protruding from the front side of the truck a changes depending on the change in the angle θ of the friction drive wheel, that is, the speed change.
changes, and the truck pitch l changes.

This may pose a safety problem when working on a trolley.

The purpose of this invention is to maintain a constant interval between carts even when the speed of the carts changes.
A drive system that utilizes frictional force when a friction drive wheel attached to the trolley so as to be able to change its direction arbitrarily is brought into contact with a rotary drive shaft extending in the running direction of the trolley, and the friction drive wheel is controlled at an arbitrary angle. In a bogie speed control device that allows a plurality of bogies to run at arbitrary speeds, the bogies are provided with a length of a connecting bar connected to the drive wheels of each bogie such that the length is not shorter than the length of the bogie in the longitudinal direction. , and the tip of the connecting bar of the trailing truck can come into contact with the rear end of the connecting bar of the leading truck, so that when controlling the speed of the leading truck, the connecting bar of the trailing truck hits the leading connecting bar and the trailing truck is The vehicle is characterized in that the angle of the drive wheels of the vehicle can be controlled to be the same as that of the preceding vehicle.

Next, an embodiment of the present invention will be described with reference to FIGS. 2 and 3. Reference numeral 1 denotes a trolley, which is configured to run on a fixed running path 3 with running wheels 2.

A rotary drive shaft 4 is installed along the running path 3 over the entire length of the running area of the bogie 10, and is driven to rotate at a constant rotational speed.

The plurality of carts 1 are configured as follows.

A friction drive wheel 6 is attached and supported on the bottom surface of each truck 1 via a vertical rotating shaft 5, and this friction drive wheel 6 is in constant contact with the rotation drive shaft 4 and moves the truck 1 by frictional force. It is designed to be driven.

The friction drive wheel 6 rotates around a horizontal axle 7 and can also rotate horizontally around a rotation shaft 5, so that the angle θ between the rotation drive shaft 4 and the friction drive wheel 6 can be changed. .

In addition, the friction drive wheels 6 are rotated and biased so that the angle θ formed by the four L rotation drive shafts and the friction drive wheels 6 is normally 45 degrees on the rotation shaft 5 of each bogie 10. 1 to run at maximum speed (Japanese Patent Publication No. 44-6330, Japanese Unexamined Patent Publication No. 5
1-149678, etc.) spring (not shown)
is the provision.

Reference numeral 8 denotes a lever for rotating the friction drive wheel 6 about the vertical rotation shaft 5, and a roller 9 is attached to the end of one lever 8.

The other lever 8' is connected by a driving wheel connecting bar 10 that is parallel to the front and rear direction of the truck 10, and the angle θ of the front and rear friction driving wheels 6 with respect to the rotational drive shaft 4 is simultaneously controlled by displacement of the connecting bar 10 in the longitudinal direction. It is made to be done.

That is, when the connecting bar 10 is displaced in the longitudinal direction with respect to the truck 1, the angle θ between the front and rear friction drive wheels 6 and the rotary drive shaft 4 changes at the same time and to the same degree.

The connecting bar 10 is provided on the truck 1 so as to be parallel to the traveling direction of the truck 10, and as described above, the connecting bar 10 itself can be displaced in the longitudinal direction with respect to the truck 1. The bar 10 has a length LO, and the trolley 1
In relation to the length L, Lo≧, in other words, it is set to a length that is not shorter than the length L of the bogie 1Q, and the tip (front end) or rear end of the connecting bar of each bogie 1 is connected to the bogie 1. 1, and protrudes forward or backward from the running path 3.
When a plurality of bogies 1 traveling above approach each other as shown in FIG. 4, the tip of the coupling no. -10 of the following bogie 1 is successively connected to the rear end of the coupling no. -10 of the preceding bogie 1. The connection of the following bogie 1 is made such that the angle θ of the driving wheel 6 is the same as that of the other bogie 1 through <-10.

In addition, at this time, the traveling pitch l of the bogie 10 is
The pitch is determined only by the length LO of 0 so that the pitch is equal.

In areas in the running path 3 where the bogies 10 need to travel at equal pitch and speed control, a control wheel (friction drive wheel 6) is installed on the ground at a position corresponding to the leading bogie in the area.
When the leading truck 1 travels to this point, the lever 80 low-y-9 comes into contact with the control bar 11, and the angle θ of the friction drive wheel 6 is set to a constant value. The configuration is such that the traveling speed of the leading truck 10 becomes a predetermined value.

Now, when the speed of the leading bogie 1 is controlled by the controller 11 on the ground side in the manner described above, the second bogie 1 that follows will have its connecting bar 10 connected to the connecting bar 1 of the leading bogie 1.
．． The friction drive wheels 6 of the second bogie 1 are rotated via the connecting bar 10 against the spring force of the rotation shaft 5, and the second bogie 1 is rotated against the rear end of the second bogie 1. The angle is the same as that of the friction drive wheel 6, and the speed is controlled to be the same.

In the same way, the ends of the coupling bars of the following bogies 1 come into contact with the coupling bars of the preceding bogies, thereby changing the angle θ of the friction drive wheels 6 of the third and subsequent bogies 1 to the angle θ of the leading bogie. The angle is the same and the speed is controlled at the same speed.

In the present invention, as described above, the same control of the running speed of each bogie is always performed in a connected manner.

Since this is done by the contact between the bogies 1, the pitch l of each continuously running bogie 1 is determined only by the length Lo of the connecting bar 10, regardless of the running speed of the bogie 1, and the pitch is always the same. It can be done.

In the illustrated embodiment, one truck 1 is provided with two friction drive wheels 6, but the number may be one.

As explained above, the present invention is capable of controlling all the following carts to the same speed by simply controlling the speed of the leading cart traveling along a fixed travel path, and furthermore, the speed control can be carried out by connecting the connecting bars to each other. Since the structure is based on contact, the pitch of the bogie can be determined by the length of the connecting bar regardless of the speed changing high or low, and multiple bogies can be run at an equal pitch. This has the effect of maintaining safety when working on a production line, and facilitating adjustment and management of production volume when working on a production line.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a recently considered bogie speed control device, Fig. 2 is a plan view of an embodiment of the present invention, Fig. 3 is a right side view of Fig. 2, and Fig. 4 shows the state in use. FIG. 1... Trolley, 3... Running path, 4...
... Rotating drive shaft, 6... Friction drive wheel, 10.
...Drive wheel connection bar θ...Angle of friction drive wheel.

Claims (1)

[Scope of utility model registration request] A friction drive wheel attached to the trolley so that it can change direction arbitrarily is brought into contact with a rotary drive shaft extending in the running direction of the trolley, and the frictional force is used by controlling the friction drive wheel at an arbitrary angle. In a bogie speed control device that allows a plurality of bogies to run at arbitrary speeds using a drive system that uses The top of the connecting bar of the trailing truck can come into contact with the rear end of the connecting bar of the leading truck, so that when controlling the speed of the leading truck, the connecting bar of the trailing truck hits the leading connecting bar. A bogie speed control device characterized in that the angle of the drive wheels of the trailing bogie can be controlled to be the same as that of the leading bogie.