JPS6225570B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of loading a conveyed object onto a predetermined position on a conveyor according to the moving speed of the conveyor (hereinafter referred to as transfer), or smoothly moving a conveyed object on a moving conveyor. This invention relates to a synchronous transfer/unloading device that can be used for loading (hereinafter referred to as unloading).

As a conventional transfer/unloading device, for example,
There are some as shown in Fig. 2 and Fig. 2. This device transfers or unloads an object 2 positioned on a lifter table 1 to a predetermined position on a moving conveyor 3 or the like.

The elevating mechanism I of this device consists of four vertical racks 4 arranged on the front, rear, left and right sides, four pinions 5 that mesh with these racks, four other pinions 7 coaxial with this pinion 5, and these pinions 7. two horizontal racks 8, 8 that engage with two of each, and a joint bar 9 that interconnects these left and right horizontal racks 8, 8.
and a vertically moving cylinder 11 having a rod 10 connected to the connecting bar 9. The horizontal movement mechanism of this device includes a truck 12 on which the vertical lifting device is placed, a rail 13 that guides the truck 12, and a rod 14 that connects one end to the truck 12.
A synchronization claw 16 that can engage with a horizontal movement cylinder 14 having a horizontal movement cylinder 14 and a synchronization attachment 15 attached to the belt conveyor 3 to achieve synchronization (meaning that the speeds of the conveyor and the cart are the same).
It consists of

In such a conventional transfer/unloading device, the vertical movement cylinder 11 of the lifting mechanism and the horizontal movement cylinder 14 of the horizontal movement mechanism are provided separately, so that the vertical movement cylinder 11 and the horizontal movement cylinder 14 are separately provided. In order to always accurately synchronize the cylinder 14, it is necessary to perform troublesome operations such as adjusting the timing of both cylinders and adjusting the operating speed. In other words, in order to transfer the conveyed object 2 to a fixed position on the belt conveyor 3 which is the conveying body, 2 steps are required.
It is not impossible to operate two cylinders at the same time if the timing and speed of both cylinders are carefully adjusted, but normally, for safety reasons, the movement of the horizontal movement mechanism causes the synchronization pawl 16 to synchronize the belt conveyor 3. After the object 2 is engaged with the conveyor attachment 15 (that is, when the transfer speeds of the belt conveyor 3 and the horizontal movement mechanism become the same), and after detecting this, the vertical lifting mechanism is operated to move the conveyed object 2 to the belt conveyor 3. I was trying to move it above.

As a result, there is a drawback that the following distance of the horizontal movement mechanism for synchronizing the transfer speed of the belt conveyor 3 becomes long.

Furthermore, if the moving speed of the conveyor 3 is changed due to production reasons, the operation timing and cylinder speed of both cylinders 11 and 14 must be adjusted separately according to the moving speed of the conveyor 3. It was impossible. It takes time to adjust the operation timing of the cylinders, and to adjust the cylinder speed, each of the cylinders 11 and 14 is provided with a cylinder speed variable means, for example.
This can be done by installing a throttle mechanism on the exhaust side of the cylinder and controlling this, but providing such a mechanism for each cylinder will make the device itself more complicated, and may cause malfunction of the device itself.
Otherwise, it will lead to an increase in manufacturing costs.

This invention was made by focusing on such conventional problems, and mechanically relates horizontal movement and vertical movement, and uses a common cylinder to perform horizontal movement and vertical movement. A transfer/unloading device that completely synchronizes the horizontal movement and vertical movement by simultaneously performing the movement, and enables the smooth transfer and unloading of conveyed objects over a relatively short distance. is intended to provide.

Embodiments of the present invention will be described below based on the drawings.

FIGS. 3 and 4 show an embodiment of the transfer/unloading device according to the present invention. In the same figure,
Reference numeral 17 denotes a base installed on the left and right sides of a belt conveyor 18, which is a transporting body, and on this base 17, a total of four pairs of horizontal racks 19 are provided. 2
Reference numeral 0 designates a pair of movable carts that move on the rack 19; It is comprised of a total of eight pinions 25 that mesh with the horizontal rack 19 supported on rotating shafts 24 provided at both ends of the pinion.

A vertical pinion 26 is coaxially supported on the rotating shaft 24 of each of the pair of movable carts 20 having such a configuration, and each of the vertical pinions 26 is provided with a vertical rack that meshes with the vertical pinion 26. 27 is provided perpendicularly to the rack 19. A lifter table 28 is installed at the upper ends of the left and right racks 27 of the vertical rack 27 in parallel with the belt conveyor 18, and is supported by the vertical pinion 26, the vertical rack 27, and the lifter table 28. It constitutes a lifting mechanism 29. Reference numeral 30 denotes a drive cylinder for the movable carriage 20, which is installed approximately in the middle of the base 17, and its piston rod 30a connects the pair of carriages and the main body 23.
It is connected to a frame 30b that is horizontally suspended. Therefore, by the operation of the drive cylinder 30, the pinion 25, which moves together with the truck body 23, rotates while meshing with the horizontal rack 19. Further, at this time, the support rollers 22 roll on the rail portions 21, so that the horizontally movable cart 20 can be smoothly moved.
Further, as the movable cart 20 moves, the vertical pinion 26 coaxially supported with the pinion 25 also rotates, so the vertical rack 27 that meshes with the vertical pinion 26 also moves up and down. 31 is the truck body 23
The synchronizing claw 31 is rotatably supported on a frame 30b, and as shown in FIG. 5, the tip 31a is normally in an upright state (solid line When synchronization attachments 18a, which are provided at regular intervals on the lower surface of the belt conveyor 18, come into contact with the tip 31a from the right side in the figure,
The synchronizing pawl 31 rotates slightly to allow its passage. Further, if the drive cylinder 30 is activated after such passage and the movable cart 20 and the lifting mechanism 29 are activated simultaneously, the tip 31
a catches up with and contacts the synchronization attachment 18a, so that the cart moves (synchronizes) at the same speed as the conveyor 18.

Note that 33 is a limit switch that is activated every time the synchronizing attachment 18a collides to generate an attachment passing signal.

Note that the pinion 25 and the vertical pinion 26 can also be integrated. In this case, the width of the pinion is made large in order to engage both the vertical rack and the horizontal rack.

Next, the operation of the present invention based on the above configuration will be explained.

As shown in FIG. 4, when the conveyed object W is positioned and placed on the lifter table 28 by a crane (not shown) or the like, the lifter table 28
A detection switch (not shown) installed in the
When this signal and the synchronization attachment passing signal of the limit switch 33 meet, the drive cylinder 30 is activated. The movement of the drive cylinder 30 causes the moving carriage 20 to move forward, and the synchronizing pawl 31 catches up and contacts the synchronizing attachment of the belt conveyor 18. After this contact, the moving carriage 20 is moved in the direction of movement of the belt conveyor 18. Move at the same speed. At this time, the vertical pinion 26, which is coaxial with the pinion 25 that is rotating while meshing with the horizontal rack 19, also rotates, and the vertical rack 27 that meshes with this is lowered, thereby lowering the lifter table 28. At this time, the moving cart 20 and the belt conveyor 18 are completely synchronized (at the same speed), so the conveyed object W on the lifter table 28 is smoothly placed at a predetermined position on the belt conveyor 18. For example, the drive cylinder 30 is moved backward by a signal from a limit switch (not shown) provided on the up/down rack 27, and the unloading device is returned to its original state, returning to the original position where the next loading/unloading operation can be performed.

In addition, due to production reasons, the belt conveyor 1
If it is better to change the speed ratio between the moving trolley 20 and the lifting mechanism 29, such as when the moving speed of the rotating shaft 24 is changed, a known method that changes the shaft support position of the rotary shaft 24 on the trolley body 23 may be used. This can be easily accomplished by simply providing means, replacing the pinion 25 or the upper and lower pinions 26, and changing the pitch diameter ratio of these pinions.

FIG. 6 shows an embodiment in which the transfer/unloading device according to the present invention is used as a device for unloading a conveyed article W on a moving conveyor. In this embodiment, the difference in structure from the transfer/unloading device shown in FIGS. 3 and 4 is that the mounting position of the rack 27 is different from the transfer/unloading device shown in FIGS. 3 and 4. While it is located on the left side of the vertical pinion 26, in the embodiment shown in FIG.
Only the points located on the right side of 6. Therefore, members having the same functions as those in FIGS. 3 and 4 are designated by the same reference numerals, and structural description thereof will be omitted.

To explain the operation, when it is detected that there is a conveyed object W on the belt conveyor 18 moving in the direction of the arrow Y and that there is a synchronization attachment passing signal from the limit switch 33, the driving cylinder 30 is activated and the vertical pinion is activated. 26 raises the vertical rack 27, and the lifter table 28 smoothly unloads the transported object W from the belt conveyor 18.

As explained above, according to the present invention, the movable trolley and the elevating mechanism are mechanically interlocked and are operated simultaneously by one drive means, so that the movable trolley and the elevating mechanism can be operated simultaneously by one drive means. There is no need to adjust the timing of the two drive cylinders or pay attention to adjusting the speed of the cylinders to ensure synchronization with the belt conveyor. Since there is no need to start operating the elevating mechanism until later, the effect is that the moving distance of the cart required for transferring and unloading can be extremely shortened.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional plan view of a conventional transfer/unloading device, FIG. 2 is a partially sectional front view of FIG. 1, and FIG. 3 is a partially sectional plan view of a transfer/unloading device according to the present invention.
FIG. 4 is a partially sectional front view of FIG. 3, FIG. 5 is a sectional view of the main part of the synchronizing pawl, and FIG. 6 shows the case where the transfer/unloading device according to the present invention is used as a loading/unloading device. FIG. 3 is a partially sectional front view. 18... Belt conveyor, 19... Horizontal rack, 20... Moving trolley, 23... Moving trolley body,
25...Pinion, 26...Upper and lower pinion, 2
7... Vertical rack, 28... Lifter table, 29... Lifting mechanism, 30... Drive cylinder.

Claims (1)

[Claims] 1. It has a horizontal rack fixedly provided along the moving direction of a conveyor such as a belt conveyor, and a movable trolley equipped with a pinion that meshes with the horizontal rack, and the movable trolley is equipped with the pinion or a pinion coaxial with the pinion. It has a vertical pinion supported above, a vertical rack that meshes with the pinion or the vertical pinion, and a lifter table installed on the vertical rack, and the movable carriage is driven by a common driving means to the conveying body. The pinion is moved in the moving direction of the carrier to follow the movement of the carrier, and the pinion that is engaged with the horizontal rack and rotates, or the up and down rack that is engaged with the up and down pinion is raised or lowered, thereby moving while moving. A transfer/unloading device, characterized in that it is adapted to transfer or unload a conveyed object onto or from a certain conveyance body.