JPH03239662A - Dolly transport device - Google Patents

Abstract

PURPOSE:To provide possibility of conducting works from upon a dolly without hindrance by installing a dolly driving device beside a certain path, furnishing a brake device downstream this position, equipping each dolly with a supporting device for object to be transported in such a way as capable of elevating and sinking, and installing lift devices for the supporting device in appropriate places on the path. CONSTITUTION:On a certain path 5 a dolly 1 is positioned as facing a dolly driving device, which shall act on the dolly 1 side, and thereby a large thrust force is given to the dolly 1 to transport it upon the path 5. This dolly 1 pushes foregoing dollies at a standstill, which thus are transported in the condition as receiving the effect of a brake device, so that the dollies are laid tight with one another in serial arrangement between the dolly driving device and the brake device, that allows an operator to walk on dollies without risk of falling off. When the dolly 1 reaches the specified position on the path 5, lift devices 30 are operated to raise a supporting device 20, and the level of object to be transported 14 is lifted with respect to the oversurface of the dolly, followed by manual operation corresponding to the level.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a trolley transport device used for transporting a non-driven trolley along a fixed route, which can freely travel between floors.

2. Description of the Related Art Conventionally, in order to transport a non-driven trolley along a fixed route, a hook piece is hung from the bottom of the trolley, as shown in, for example, Japanese Utility Model Publication No. 59-2865. A structure has been proposed in which a check 7 is disposed at a plurality of locations on the check 7, pusher protrusions that can be freely engaged with the hook pieces are provided at a plurality of positions of the check 7, and a vehicle support is erected on the trolley. There is.

Problems to be Solved by the Invention According to the conventional system as described above, the checks 7 must be disposed over the entire length of a fixed route, which makes the entire length of the fixed route complicated, and the trolley is not hooked to the trolley. The pieces must be attached with high precision, and since the conveyance pitch of the carriage is based on the pitch of the attachment of the bushing protrusions, a gap is created between the front and rear ends of these carriages, making efficient conveyance impossible.

In addition, when a worker on the trolley performs manual work on the vehicle while the trolley is being transported, the above-mentioned gap may cause the worker to fall, making it unsafe to do so.Furthermore, the vehicle supported by the support device is always at a certain level on the trolley. Therefore, depending on the work location, the worker may have to take an awkward posture.

The objects of the present invention are: - Only a part of the main route needs to be installed, and most of the remaining parts can be uncluttered; furthermore, transport can be carried out without creating gaps between the trolleys; The purpose of the present invention is to provide a trolley transport device that allows work to be carried out easily and safely.

Means for Solving the Problems In order to achieve the above-mentioned object, the trolley transfer device of the present invention is provided with a trolley drive device that applies running force to the trolley on the side of a fixed path along which the trolley can travel freely, and the trolley drive device A brake device is provided on the downstream side of a certain path from the position of the device, and the brake device is provided in contact with the trolley to apply a braking force smaller than that of the trolley drive device; Lift devices for raising and lowering the support device are provided at multiple distances along a fixed route, and the lift devices are configured to be movable between a lifting position and a non-lifting position.

Effects According to the configuration of the present invention, the truck is positioned facing the truck drive device on a fixed path. By applying the truck driving device to the truck side, a large propulsive force is applied to the truck, and the truck is thereby transported along a fixed route. At that time, the truck will back up the stopped truck group in front of it to carry it. - On the downstream side of the main route, the braking device acts on the carts, so the carts on this downstream side are transported with the brake applied, and therefore the group of carts is placed between the front and rear ends. It is conveyed with tight support without creating any gaps. In this way, since the group of carts is tightly arranged in series between the cart drive device and the brake device, the worker on the cart can perform manual work or walk without falling. When the trolley reaches a predetermined point on a certain path, the support device can be raised by activating the lift device, thereby raising the level of the transported object with respect to the upper surface of the trolley, and the hand corresponding to the level can be raised. Able to perform work. In addition, by changing the level amount due to elevation at a plurality of locations, manual work can be performed at various levels within a fixed route.

Example An embodiment of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a cart that can freely travel between floors, and has a plurality of wheels 3 at the bottom of a main body 2 so as to be freely rotatable. This trolley 1 is placed on a pair of left and right rails 4 via wheels 3, and is therefore able to run freely on a fixed route 5. On the upstream side of this main route 5, -
A cart carrying-in device 6 and a main conveyance cart driving device 7 are arranged at appropriate intervals in the direction of the main route 5, and - a cart carrying-out device 8 is arranged downstream of the main route 5. The brake device 9 is arranged slightly better than this.

Here, the cart carrying-in device 6, the cart driving device 7, and the cart carrying-out device 8 have similar structures, and the feed roller 11, which is interlocked with a pair of left and right servo motors 10 that are electrically synchronized, is connected to the cart 1. It is constructed so that it can freely come into contact with and separate from both side surfaces 1a. Further, the brake device 9 includes brake rollers 13 that are interlocked with a pair of left and right torque motors 12 that are electrically synchronized, so that the brake rollers 13 can come into contact with and separate from both side surfaces 1a of the truck 1. Note that the torque motor 12 applies a reverse rotational force A to the brake roller 13. The rotational force B for feeding the feed roller 11 by the servo motor 10 is set to be larger than the rotational force A for reverse feeding by the torque motor 12 .

A support device 20 that supports a body 14, which is an example of an object to be transported, is provided on the trolley 1 so as to be movable up and down.

That is, the support device 20 consists of a front support 21A and a rear support 21B, each of which has a pair of left and right lifting rods 22.
A and 22B, and the upper ends of the left and right rods are connected by frames 23A and 23B. The main body 2
There is a cylindrical body 24A that guides the lifting rods 22A and 22B.
, 24B are attached, and by bringing the frames 23A, 23B into contact with the cylindrical bodies 24A, 24B, the frame 23A
, 23B (the lower limit of pl is regulated.The body 14 is mounted on the upper surface of the frame 23A, 23B by a fixture 25A.
.

25B, and rollers 26A and 26B are reversibly attached to the lower ends of the lifting rods 22A and 22B. Note that a fall prevention roller 27 is attached to the lower surface side of the main body 2.

Lift devices 30 for raising and lowering the support device 20 are independently operable and disposed at a plurality of locations in the fixed path 5. This lift device 30 has a pair of left and right guide rails 32 on a base body 31, and these guide rails 32 are divided into two in the length direction along the fixed path 5. A pair of front and rear movable bases 35 are provided on the guide rail 32 and supported and guided via a vehicle va33 and guided by an Ia regulating roller 34.
The I-junction is connected via a pin 36 and a rod 37. A cylinder device 38 mounted on the base body 31 is connected to one movable base 35, so that the cylinder device 38
By expanding and contracting, both rotating tables 35 are made integrally movable along a fixed path 5. Brackets 39 are erected from the base body 31 outside the ends of the guide rails 32, and vertical guide bodies 40 are attached to opposing inner surfaces of these brackets 39. Elevating frames 43 are connected in opposing directions from an elevating member 42 guided by a guide body 40 via rollers 41, and the opposing elevating frames 43 are integrated by a connecting member 44. Furthermore, support rods 45 are installed in a row from a plurality of locations on the lifting frame 43 toward the outside in the left-right direction, and a lifting rail 46 is installed along a certain path 5 between the free ends of these support rods 45.
This lifting rail 46 is connected to the rollers 26A and 26B.
can be freely contacted from below. At the lower part of the lifting frame 43, a cam part 47, which is located on the downstream side, is formed in the shape of a lateral protrusion. A presser roller 49 that can freely come into contact with it is attached to a bracket 50 that stands up from the movable table 35 so as to be freely rotatable. Therefore, the cylinder device 38 is expanded and contracted, and both rollers 48 and 49 are moved through the movable table 35 or the like.
By moving the lifting frame 43 in the direction of the fixed path 5, the lifting frame 43 can be raised and lowered via the cam part 47, and the lifting rail 46 can be raised and lowered between the raised working position and the lowered non-working position. . Incidentally, a fall prevention rail 51 to which the fall prevention roller 27 can be freely fitted is provided in the lift device 30 portion.

The cart 1 that has been supplied to the starting end of the fixed path 5 is loaded by hand or the like so that its front end enters the cart loading device 6.

Then, the trolley 1 is conveyed for a short distance on a fixed path 5 and delivered to a trolley drive device 7. At this time, both feed rollers 11 are separated from each other. Therefore, the delivery will be carried out without any problems. After being carried in, both feed rollers 11 are moved closer to each other and brought into pressure contact with the side surface 2a of the main body 2, but at this time the feed rollers 11 are rotationally driven. That is, both feed rollers 11 are forcibly rotated in opposite directions by driving the servo motor 10 via a speed reducer or the like.

Therefore, the feed roller 11, which is being forcibly rotated, is
By pressing against a, a running force is applied to the cart 1, and the cart 1 is thereby transported C on a fixed path 5.

The brake device 9 applies a brake to the truck 1 that has reached the end of the fixed route-5.

That is, when the conveyance operation of the truck 1 by the truck drive device 7 is stopped, the brake rollers 13 in the brake device 9 are spaced apart from each other. Then, in conjunction with the loading movement of the truck drive device 7, both brake rollers 13 are moved closer to each other and brought into pressure contact with the side surface 2a of the main body 2. At this time, the brake roller 13 is moved toward the side opposite to the feed roller 11. It is rotationally driven. That is, by driving the torque motor 12, both brake rollers 13 are forcibly rotated in opposite directions via a reduction gear or the like. Therefore, when the brake roller 13, which is being forcibly rotated, is brought into pressure contact with the side surface 2a, a propulsive force in the reverse transport direction acts on the cart 1 due to the reverse feed rotational force A, but here the feed rotational force B is the reverse feed rotational force. Since it is larger than A, the brake roller 13 is rotated toward the feed rotation side in accordance with the difference, and the load at that time is absorbed by the torque motor 12. As a result, the corresponding trolley 1 in the lower position is transported with the brake applied, and therefore, between the trolley drive device 7 and the brake device 9, a plurality of trolleys 1 are placed between the front and rear ends. They will be lined up in a closely backed state without any gaps between them. Due to such support, a flat work space is formed by the upper surfaces of the bodies of the 1 group of trolleys arranged in a straight line.
Able to perform various manual tasks. At this time, even if one group of carts is being transported, the worker can do manual work or walk without falling back and forth because the one group of carts is in a dense straight line.

When the cart 1 being transported reaches a specific location, the lift device 30 is activated as necessary. That is, when both rollers 26A, 26B of the truck 1 face the starting end of the lifting rail 46, a detection signal is issued, and based on the detection signal, the cylinder device 38, which is in the contracted state, is extended as shown in FIG.

As a result, both rotating tables 35 are moved upstream. Then, since the roller 48 and the presser roller 49 of the receiver move together, the elevating frame 43 is raised via the cam portion 47. This raising is carried out directly above guided by the guide body 40, and at the same time, the lifting rail 46 is raised via the support rod 45.

As the lifting rail 46 rises, the lift 1iiiI & rod 22A 22B is pushed up via the rollers 26A, 26B as shown in FIG.
The body 14 supported between 25B can be raised. As a result, the level of the body 14 rises with respect to the upper surface of the book #2, and the operator on the main body 2 can perform manual work on a predetermined location of the body 14 that has been raised while the trolley 1 is being transported.

Then, in response to a detection signal when both rollers 26A, 26B face the end of the lifting rail 46, the cylinder device 38, which is in the contracted state, is contracted as shown in FIG.

As a result, both rotating tables 35 are moved downstream, and since the rollers 48 and presser rollers 49 move together, the elevating frame 43 is lowered via the cam portion 47. Therefore, since the lifting rail 4B is lowered together, the lifting rods 22A, 22B are pushed down, so that the receivers are moved to the tool 25A,
The body 14 supported between 25B can be lowered.

In addition, in the lift action section, as shown by the imaginary line in FIG. 3, a fall prevention roller 27 is fitted into a fall prevention rail 51, thereby preventing the cart 1 from falling sideways due to a rise in the center of gravity. .

The above action is performed at all of the plurality of locations where the lift equipment and t30 are installed, or at some locations where it is necessary. In addition, the lift amount can be adjusted by changing the III compression amount of the cylinder device 38, and it is also possible to differentiate the lift amount at multiple locations, so it is possible to achieve an appropriate lift amount depending on the work content and vehicle type. It is possible.

The cart 1 pushed out from the brake device 9 by the above-mentioned push is carried out to the next process by the cart carrying-out device 8.

Also, trolley 1! During conveyance by the moving device 7, the braking action by the lower brake device 9 is stopped when the following feed amount is detected.

The cart loading device 6, the cart driving device 7, and the cart unloading device 8
, the corresponding servo motors 10 and the corresponding torque motors 12 in the brake device 9 are electrically synchronized.

In the above embodiment, both side surfaces 2a of the main body 1 are shown as parts on which the trolley drive device 7 and the like act, but in this case, for example, a pressure receiving body is hung from the center of the bottom surface of the book #1, and both sides of this pressure receiving body are The trolley drive device 7 may also be used in the form of
In this example, the feed roller 11 is brought into pressure contact from the left and right sides, but this is also a type in which the feed roller 11 can be freely approached and separated only from the - direction, and a group of idle rollers is arranged in a stationary manner on the other side for backup. Good, moreover, the trolley drive device 7
As for the type in which the conveyor belt is pressed in place of the feed roller 11, the trolley 11P! A possible option is to engage a drive pinion with a rack. Such a modified structure of the truck drive device 7 can also be adopted for the truck loading device 6, the truck unloading device 8, the brake device 9, etc.

Effects of the Invention According to the present invention having the above configuration, after the cart is positioned opposite to the cart driving device on a fixed path, a large propulsive force can be applied to the cart by causing the cart driving device to act on the cart side. Therefore, the cart can be transported along a fixed route. In this case, the truck can back up the stopped truck group in front of it and transport it. As a result, it is only necessary to install the trolley drive device on a part of the fixed route, and the S miscellaneousness can be eliminated for most of the remaining route. In addition, at the bottom of a certain route, the brake device acts on the downstream trolley, so the downstream trolley can be transported while being braked, and therefore the group of trolleys is separated between the front and rear ends. It is possible to efficiently convey the material with close support without creating any gaps. Since the group of carts can be closely arranged in series between the cart drive device and the brake device, workers on the carts can always perform manual work or walk safely without falling. Furthermore, by raising and lowering the support device by operating the lift device, the level of the transported object relative to the top surface of the trolley can be changed, allowing the operator on the trolley to easily perform manual work on the transported object at the optimal level. be able to. By adjusting the amount of elevation and using a plurality of locations, the work location can be adapted to suit the type of object to be transported.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a surface survey of the main parts with the support device in the raised state, FIG. 2 is a side view of the main parts with the support device in the lowered state, and FIG. 3 is a side view of the main parts with the support device in the lowered state. FIG. 4 is a front view of essential parts of the beam-lid device, FIG. 5 is a schematic side view of the entire device, and FIG. 6 is a schematic plan view thereof. 1... Trolley, 2... Main body, 2a... Side, 5...
- Constant path, 7... Cart drive device, 9... Brake device, 10... Servo motor, 11... Feed roller, 12... Torque motor, 13... Brake roller, 14...・Body (object to be transported), 20... Support device, 21A... Front support body, 21B... Rear support body,
22A, 22B... Lifting rod, 25A. 25B...Receiver, 26A, 26B...Roller, 3
0... Lift device, 35... Movable base, 40... Guide body, 43... Lifting frame, 47... Cam part, 48...
...The receiver is a roller, 49...The presser roller.

Claims (1)

[Claims] 1. A trolley drive device that applies running force to the trolley is provided on the side of a fixed route along which the trolley can freely run, and a trolley drive device is provided on the downstream side of the fixed route than the position of the trolley drive device, so as to contact the trolley and drive the trolley. A brake device that applies a braking force smaller than that of the drive device is provided, a support device for the conveyed object is provided on the trolley so as to be able to be raised and lowered, and a lift device that raises and lowers the support device is provided at a plurality of locations on the fixed route, and A trolley transfer device characterized in that a lift device is configured to be movable between a lifting position and a non-lifting position.