JP3846618B2 - Cart carrier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cart transport device for transporting a cart loaded with a transported object in a friction drive manner.
[0002]
[Prior art]
For example, when a cart loaded with a car body is transported by a cart transport device using a chain, the transport pitch can be adjusted by changing the position of the dog attached to the chain, but between the dog and the hook of the cart. There is a problem that pulsation is likely to occur during play. Therefore, a friction drive type cart conveying device, a so-called friction conveyor, is known in which a driving wheel is brought into pressure contact with a side surface of the most upstream cart, and the cart is conveyed on a rail by its rotational drive.
[0003]
[Problems to be solved by the invention]
According to this friction drive type cart transport device, the cart can be transported smoothly in a continuous state, but when the transport pitch is to be adjusted, the cart length needs to be changed.
[0004]
In view of such a point, an object of the present invention is to provide a friction drive type cart transport device capable of arbitrarily adjusting the transport pitch without changing the cart length.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the present invention provides, according to claim 1, a carriage transporting device for transporting a carriage for loading a carriage, a carriage traveling rail for running the carriage, and a conveyor bar along the rail. A plurality of continuous conveyor bars are driven to run by rotating the drive wheels by frictionally engaging driving wheels on the side surfaces of the uppermost conveyor bar in the conveyance start area. A bar driving device is provided, and a bar holding tool for connecting the carriage to the conveyor bar by detachably holding a bar side surface at an arbitrary position on both sides of the conveyor bar is provided on the carriage.
[0006]
The most upstream conveyor bar is driven to travel by frictionally engaging a rotationally driven drive wheel with the side surface of the conveyor bar. A conveyor bar continuous downstream of the conveyor bar is also driven to drive. The conveyance pitch of the carriage can be adjusted by setting the position at which the carriage is connected to the conveyor bar.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
A cart conveying device according to an example of the embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a carriage traveling rail 11 for traveling a carriage 10 loaded with an automobile body with its wheels 12 and a plurality of carriages 10 connected to the inside of the rail are located on the conveyance path. Bar running rails 21 for running a continuous conveyor bar 20 with wheels 22 are laid. Further, a bar return rail 21 a for returning the conveyor bar 20 is laid diagonally below the rail 21, and a carriage return rail for returning the carriage 10 is laid below the rail 21. Although not shown, this rail is continuous with a rail 41 of an elevator 40 described later.
[0008]
Each trolley 10 is provided on the bottom surface of the trolley 10 so as to be slidable in an orthogonal direction with respect to the bar side surface 201 so as to be detachably connected to the conveyor bar 20 by sandwiching the bar side surfaces 201 on both sides of the conveyor bar 20. The rod-shaped sliders 14 on both sides guided by the guide bracket 13, the contact portions 16 on both sides that are respectively supported by the tip portions of the sliders and contact the bar side surface 201, and the contact portions on the bar side surface 201. 13 A of bar | burr holding tools comprised from the spring 15 urged | biased so that it may press-contact is provided.
[0009]
In the conveyance start area CS, as shown in FIG. 2, a friction-driven bar driving device 24A for driving the most upstream conveyor bar 20 along the rail 21 and an engagement piece rotatably supported by the slider 14 The rails 5 on both sides are gradually widened toward the downstream side so as to engage with the inner side of the roller 18 and to make the contact portions 16 on both sides separate from each other, and adjacent to the downstream end of this rail. A carriage connecting device 30 for connecting the carriage 10 to the conveyor bar 20, an elevator 40 for raising and lowering the carriage 10 between the rail 11 and the lower return rail, and both front and rear sides of the carriage 10 mounted on the rail 41 And a cart driving device 45 </ b> A that rotates by a motor 46 in a frictional engagement state of the driving wheels 45.
[0010]
The bar driving device 24A presses the driving wheel 23 in a frictional engagement state on one surface of the bar side surface 201, and presses the guide wheel 25 rotatably supported by a support shaft 251 on the other surface in a frictional engagement state. The drive wheel 23 is rotationally driven by a motor 24. The conveyor bar 20 is configured as a square-shaped cross-sectional metal tube that is not deformed by the pressure contact of the drive wheel 23, the guide wheel 25, and the contact portion 16.
[0011]
The cart coupling device 30 includes a restraining piece 31 that engages with the inside of the roller 18 that has traveled in a separated state, and a cylinder 32 that serves as an actuator for driving back and forth. That is, the roller 18 is restrained by the restraining piece 31 attached to the tip of the cylinder rod, the restraint is released by the forward movement of the cylinder 32, and the bar side surfaces 201 on both sides are spring-biased by the contact portions 16 on both sides. The cart 10 is connected to the conveyor bar 20 by sandwiching. A corner portion 31a is formed at the downstream end portion of the restraining piece 31 so as to stop the roller 18 (see FIG. 2).
[0012]
On the other hand, in the conveyance end area CT, a carriage removing device 35A for removing the carriage 10 from the conveyor bar 20, the elevator 40 of the carriage 10, and the above-described carriage driving device for conveying the carriage 10 detached from the conveyor bar 20 to the elevator 40. 45A.
[0013]
The cart detaching device 35 </ b> A engages with the inner side of the roller 18 that has traveled and the restraint piece 37 that travels, and the restraint piece 37 so that the contact portion 16 is separated from each other to release the bar side surface 201. And a cylinder 38 as an actuator for reversing drive.
[0014]
In addition, a bar return device is provided in the transfer end area to guide the conveyor bar 20 from which the carriage 10 has separated after reaching the transfer end area to the lower rail 21a and to return it by the same device as the bar driving device 24A. Yes. Correspondingly, in the transfer start area, the returned conveyor bar 20 is speed-controlled so as not to give an impact to the uppermost conveyor bar 20 on the rail 21, and the bar is returned to keep the end surfaces in contact with each other. A device is provided.
[0015]
Further, in the transport end area CT, the carriage 10 on which the received transported material is lowered is lowered by the elevator 40, travels on the carriage return rail continuous to the rail 41, and returns to the carriage driving device 45A. A carriage return device is provided. Correspondingly, in the transfer start area, the returned carriage 10 is received by the elevator 40 and raised to the drive position by the carriage drive device 45A. In addition, when moving the trolley | bogie 10 which moved to the conveyance completion area to another trolley | bogie conveyance apparatus, it is not necessary to provide the elevator 40 and a trolley | bogie return apparatus.
[0016]
The bar driving device 24A, the cart connecting device 30, the elevator 40, the cart driving device 45A, the cart removing device 35A, the bar returning device and the bar returning device described above are arranged so that the cart 10 and the conveyor bar 20 are circulated. Sequence control means that is controlled in response to a detection signal of a sensor to which the user belongs is detected. For the carriage connecting device 30, the rotation amount signal of the transmitter attached to the motor 24 of the bar driving device 24A is counted from the time when the restraining piece 31 detects the engagement of the roller 18 by, for example, a pressure sensor, and the conveying pitch S (FIG. The cylinder 32 is moved forward at the timing when the count number corresponding to 4) is reached. Further, on the assumption that the conveyor bar 20 always travels at a constant speed, the cylinder 32 may be operated in response to a timer signal that measures the time corresponding to the transport pitch S from the detection time of the roller 18.
[0017]
The operation of the transport apparatus configured as described above is as follows. The automobile body 1 is loaded on the carriage 10 mounted on the elevator 40 rising in the conveyance start area CS, and is driven downstream by the carriage driving device 45A. At that time, the rails 5 on both sides are inserted into the rollers 18 on both sides, and the contact part 16 is gradually separated along the inclination, and is handed over to the restraining piece 31 of the carriage coupling device 30 to temporarily stop and lead. When the conveying pitch S with the carriage 10 reaches, for example, a desired 300 mm, when the restraining piece 31 is moved forward and loosened, the contact portions 16 on both sides sandwich the bar side surface 201 and the carriage 10 moves to the conveyor bar 20. Connection is started and conveyance is started (see FIG. 3).
[0018]
The upstream end surface of the preceding conveyor bar 10 abuts on the downstream end surface of the most upstream conveyor bar 10, and the end surfaces of the preceding conveyor bar 10 abut on each other in order, so that the continuous conveyor bar 10 group has no pulsation. Is smoothly driven (see FIG. 4).
[0019]
When the transport end area CT is reached and the roller 18 is restrained by the restraining piece 37, the contact portions 16 are automatically separated from each other, so that the transport by the conveyor bar 20 is finished and transported to the elevator 40 by the carriage driving device 45A. The loaded automobile body 1 is lowered. At the same time, the conveyor bar 20 from which the carriage 10 is detached is returned by the rail 21a, and the carriage 10 released from loading is lowered and returned by the return rail, and returns to the rails 11 and 21 in the conveyance start area, respectively. Recycle.
[0020]
【The invention's effect】
According to the first aspect of the present invention, since the carriage can be connected to any position of the conveyor bar that is continuously running, the conveyance pitch of the carriage can be easily adjusted, and the conveyance speed of the conveyor bar is always constant. Even so, the conveyance amount can be adjusted according to the change in the production amount. According to the invention of claim 2, it is possible to automate the connection and disengagement of the conveyor bar to and from an arbitrary position in consideration of the conveyance pitch of the carriage.
[Brief description of the drawings]
FIG. 1 is a front view of a cart transport apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view of the cart transport device.
FIG. 3 is a front view for explaining a connection state between a carriage and a conveyor bar of the carriage conveyance device.
FIG. 4 is a schematic side view for explaining a transport operation of the cart transport apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Carriage 11 Carriage rail 14 Rod-shaped slider 16 Contact part 18 Roller 20 Conveyor bar 201 Bar side surface 21 Bar travel rail 23, 45 Driving wheel,
24 motor 24A bar drive device 30 cart connection device 31, 37 restraint piece 32 cylinder 35A cart release device 40 elevator 45A cart drive device 46 motor

Claims (2)

In the cart transport device for transporting the cart for loading the transported goods,
A trolley for driving a trolley and a bar traction rail for running a conveyor bar along the rail are laid,
In the conveyance start area, a bar driving device for driving and driving a plurality of continuous conveyor bars by rotationally driving the drive wheels frictionally engaged with the side surfaces of the uppermost conveyor bar is provided.
A cart transporting device, comprising: a bar clamping device that detachably clamps the bar side surface at an arbitrary position on both sides of the conveyor bar to connect the cart to the conveyor bar. Sliders on both sides guided by the carriage so that the bar holding tool can slide in a direction orthogonal to the bar side surface of the conveyor bar, and both abutting portions that are respectively supported by the tip of the slider and abut on the side surface of the bar And a spring that urges the abutting portion to press-contact each of the side surfaces of the bar,
Separating rails on both sides that are gradually widened toward the downstream side so as to engage with engaging pieces attached to the slider and to separate the abutting portions on both sides in the conveyance start area, The connecting restraint pieces are respectively engaged with the engaging pieces on both sides that have traveled by being adjacent to the downstream end of the separation rail to restrain the travel of the engaging pieces, and the restraint is released at a predetermined timing. A carriage connecting device for holding the side surfaces of the bars on both sides by the contact portions on both sides in a biased state by the spring,
A cart detaching device for separating the detaching restraining pieces respectively engaged with the engaging pieces on both sides of the traveling so as to release the holding of the side surfaces of the bars on both sides by the contact portion in the conveyance end region. The cart transport device according to claim 1, wherein the cart transport device is provided.

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