JPH0139385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an asynchronous transport device equipped with a transport carriage that moves along guide rails. More specifically, a driving means such as a chain that moves along this path is provided on the side of the carriage moving route, and a toothed wheel that engages with the driving means is pivotally supported on the side of the transporting carriage, and a braking means is provided on the side of the carriage. In the trolley-type conveying device, the conveying carriage is moved forward together with the driving means by fixing the gear, and the conveying carriage is stopped by releasing the braking action of the braking means. The purpose is to allow the trolley to be moved freely back and forth by hand within a certain section.

Hereinafter, one embodiment of the present invention will be described based on the attached illustrative drawings. In FIG. 1, 1 is a guide rail constructed along a horizontal circulation path, and 2 is movably supported on the guide rail 1. 3 is a drive chain for moving the transport vehicle 2 forward (means for driving this drive chain 3 is not shown);
4 is a transport vehicle stopping means.

As shown in FIGS. 2 and 3, the guide rail 1 has an upper guide rail portion 1a and a lower guide rail portion 1b connected and integrated by a vertical wall portion 1c. includes a loading platform 2a located on one side of the guide rail 1 at substantially the same level as the lower guide rail 1b, and a vertical wall 2b adjacent to the guide rail 1. The driving chain 3 includes a vertical shaft roller 3a supported at both upper and lower ends of the link connecting pin, and a supporting horizontal shaft roller 3b pivotally supported by the lower link, and the drive chain 3 includes a lower guide rail portion of the guide rail 1. By loosely fitting the rollers 3a and 3b into the chain guide rail parts 5a and 5b that are integrally formed directly above,
It is supported to move along a fixed path. 6
are mounting screws that are respectively engaged with upper and lower engagement grooves 7 that are integrally formed on the back side of the guide rail vertical wall portion 1c. The guide rail 1 is attached to (omitted).

As shown in FIGS. 3 and 4, the transport vehicle 2 includes an upper guide rail portion 1a of the guide rail 1.
A pair of front and rear horizontal axis rollers 8 to ride on, a pair of front and rear vertical axis rollers 9 that come into contact with the back side of the upper guide rail section 1a, a pair of front and rear vertical axis rollers 10 that come into contact with the front side of the lower guide rail section 1b, and the rollers. It is movably supported by the guide rail 1 via a vertical shaft roller 11 that abuts on the back side of the lower guide rail portion 1b at a position corresponding to 10.

Reference numeral 12 denotes a sprocket wheel that meshes with the drive chain 3, and a vertical rotation shaft 14 supported via a bearing 13 on the back side of the vertical wall portion 2b of the conveyor cart.
Fixed. Reference numeral 15 denotes a vertically movable cone clutch type braking means, and as shown in FIG. The movable brake body 16b is fitted into the cone-shaped brake body 16a and loosely fits into the cone-shaped brake body 16a so as to be able to come into contact with and separate from the cone-shaped body.

17 is an operation means for releasing the brake from the cone clutch type braking means 15, which includes a pair of brake release levers 18, a vertical operation lever 22 extending forward, and a link mechanism 28 for interlocking both levers 18, 22. , and a sub-roller 38 pivotally supported on the side adjacent to the guide rail 1 at an intermediate position of the operating lever 22. The brake release lever 18 is attached to a horizontal support shaft 18 as shown in FIG.
a is pivotally supported on the back side of the vertical wall portion 2b of the conveyance vehicle so as to be able to swing up and down, and its free end sandwiches the parallel flat side surface portion 19 formed on the movable brake body 16b, and It engages with a pair of pins 20 protruding from the side surface 19 via elongated holes 21 .
Therefore, rotation of the movable brake body 16b is prevented by this lever 18. The vertical operation lever 22 is pivotally supported by a horizontal support shaft 23 on the back side of the vertical wall portion 2b of the transport vehicle so as to be able to freely swing up and down, and its tip is attached to the side where the sub roller 38 is located relative to the operation lever 22. On the opposite side, a cam driven roller 25 rotatable around a horizontal support shaft 24 and a brake spring 26 (see FIG. 3) that apply an appropriate rotational resistance force to this roller 25 are provided. The braking force of this brake spring 26 can be adjusted with an adjustment nut 27. The link mechanism 28 includes a link 29a that integrally extends upward from the operating lever 22, and this link 29a.
a link 29b connecting the tip of a and the middle part of the brake release lever 18, and connecting pins 30a, 3
0b. 31 is braking means 1
The brake release lever 1 is a spring that biases the brake release lever 1 to a braking state through a spring receiving seat 33 that is housed in a fixed bracket 32 and that can be raised and lowered.
The position of the link connecting pin 30b of No. 8 is pressed downward, and the pressing force can be adjusted by the adjustment screw 34.

Reference numeral 35 is a cam for stopping a subsequent conveyance vehicle attached to the rear side of the vertical wall portion 2b of the conveyance vehicle in a state of extending rearward, and as shown by the imaginary line in FIG. The operation lever 22 of the transport vehicle is provided at a position where it can be moved upward via a roller 25 at its tip, and a stopper 37 is attached to the end thereof to abut against the contact surface 36 of the following transport vehicle. There is.

Reference numeral 39 is a cam rail for moving the operating lever 22 upward via the sub-roller 38, as shown by the imaginary line in FIG. It is attached to the cam rail attachment part 40 of the guide rail 1. Transport vehicle stopping means 4 shown in FIG.
As shown by the imaginary line in FIG. 4, the cam 41, which is the same as the cam 35 for stopping the subsequent transport vehicle, is placed in the active position (the passing position of the cam 35 for stopping the subsequent transport vehicle) and in the non-operative position, which allows the transport vehicle 2 to pass. The cam 41 is configured to be movable between positions, and the position switching of this cam 41 is performed manually or automatically.

Next, the method of use and operation will be explained. Normally, as shown in FIG. 4, the movable braking body 16b of the braking means 15 is biased downward by the biasing force of the spring 31, and the movable braking body 16b is tightly pressed against the cone-shaped braked body 16a. By fitting, the sprocket wheel 12 is fixed so as not to rotate. Therefore, as the drive chain 3 moves in the transport vehicle forward direction 42, the sprocket wheel 12 engages the drive chain 3.
Each carriage 2 equipped with a drive chain 3 moves in the forward direction 42 along the guide rail 1 together with the drive chain 3.

When stopping the approaching transport vehicle 2 at a predetermined stop position, the cam 41 of the stopping means 4 disposed at the stop position is moved from the non-operating position shown by the imaginary line in FIG. 4 for stopping the following transport vehicle. By manually or automatically switching to the operating position where the cam 35 passes, the carrier 2 approaches this stop position.
The operating lever 22 is moved upward around the horizontal support shaft 23 where the roller 25 rides on the cam 41. As a result, the brake release lever 18 is pushed upward around the horizontal support shaft 18a via the links 29a and 29b, and the movable brake body 16 of the brake means 15
b is raised against the biasing force of the spring 31 as shown in FIG.
The tight fit with a is released. That is, the braking means 15 is in a brake-released state, and the sprocket wheel 12 is in a freely rotatable state, so that it rotates as the drive chain 3 moves, and the carriage 2 becomes free. The carriage 2, which has become free in this way, moves between the stopper 43 provided at the tip of the cam 41 and the front end contact surface 36.
Although the transport vehicle 2 is stopped at a predetermined position by contact with the transport vehicle 2, a transport vehicle fixed position locking means for locking the transport vehicle 2 at a predetermined position may also be used.

After the load transfer work between the stopped transport vehicle 2 and the loading platform 2a or various operations on the workpieces on the loading platform 2a is completed, the cam 41 of the stopping means 4 is retracted to the non-operating position and the cam 41 is not operated. By making the lever 22 movable downward and allowing the transport vehicle 2 to move forward, the braking means 15 automatically brakes the sprocket wheel 12 by the biasing force of the spring 31. The carriage 2 starts moving forward together with the drive chain 3. While the transport vehicle 2 is stopped at the stop position as described above, when the following transport vehicle 2 approaches the position where it collides with the stopped transport vehicle 2, the following transport vehicle 2 is stopped as shown by the imaginary line in FIG. 2 operation lever 2
2 is moved upward by the cam 35 for stopping the subsequent conveyance vehicle 2 in the same way as when the cam 41 of the stop means 4 moves upward, and therefore, as described above, the subsequent conveyance vehicle 2 The braking means 15 of the cam 3 is switched to a brake release state, and the following conveyance vehicle 2 automatically becomes free, and the cam 3
It will stop with the contact surface 36 in contact with the rear end stopper 37 of No. 5. In this way, the carriages 2 can be automatically stored one after another starting from the position of the stop means 4.

In addition, in the section where the cam rail 39 is provided in the horizontal circulation path of the transport vehicle 2, the sub roller 38 of the operating means 17 rides on the cam rail 39, and the operating lever 22 moves upward, causing the sprocket to move upward. The braking action of the braking means 15 on the wheel 12 is released in the same way as when it is released by the cam 35 or 41, and the carrier 2 becomes free. Moreover, the sub roller 38 is the cam rail 3
Sprocket wheel 1 as long as it is on 9
Since the brake applied to the carriage 2 remains released, the brake on the carriage 2 remains released within the section where the cam rail 39 is located.
can be moved by hand operation.

Note that the configuration of the operating means 17 is not limited to that shown in the embodiment. For example, the sub-roller 38 can be pivotally supported by the brake release lever 18, or the cam driven roller 25 can be omitted and the cam 35 or 41 can be made to act on the sub-roller 38 to stop the carriage. .

The trolley-type asynchronous transport device of the present invention can be implemented and used as described above, and includes a rotatable gear wheel (in the embodiment, the sprocket wheel 12 )
and a braking means for switching this gear between a fixed state and a rotatable state (in the embodiment, a cone clutch type braking means 15 was used, but the invention is not limited to this).
a spring that biases the braking means into a braking state to fix the gear; an operating means for switching the braking means to a brake release state; A driving means such as a chain that engages with the gears and moves along the guide rail is provided on the side of the guide rail, and a driving means such as a chain that engages with the gears and moves along the guide rail, and a A transport vehicle stopping means for operating the operating means is provided, and a cam rail for continuously holding the braking means in a brake-released state via the operating means in a predetermined section to enable free movement of the transport vehicle. Therefore, it is possible to asynchronously advance and stop each of the plurality of transport vehicles belonging to a common movement route, and to conveniently utilize the system as a highly flexible transport device.
Particularly, in a specific section, the braking action of the braking means is automatically released continuously by the cam rail, and the carrier can be freely moved back and forth by manual operation. Therefore, the specific section is covered by a work line in which transport vehicles are sequentially manually transported and parts are sequentially assembled onto the workpieces on the transport vehicles.
It can be conveniently used as a test line for sequentially performing different tests.

Further, it is also possible to forcibly drive the transport vehicles in the specific section at different speeds by another driving means (for example, an auxiliary chain conveyor with a pusher).

[Brief explanation of drawings]

Fig. 1 is a schematic plan view of the entire structure, Fig. 2 is a perspective view showing the guide rail and carrier, Fig. 3 is a vertical side view of the main part, Fig. 4 is a longitudinal cross-sectional rear view of the main part, and Fig. 5 FIG. 2 is an enlarged longitudinal sectional view showing the vicinity of the cone clutch type braking means. 1...Guide rail, 2...Transportation cart, 3...
Drive chain (driving means), 4...stopping means, 12
...Sprocket wheel (gear), 15...Vertical movable cone clutch type braking means, 16a...Cone shaped braked body, 16b...Movable braking body, 17...
Operating means, 18... Brake release lever, 22... Operating lever, 25... Cam driven roller, 26...
Brake springs, 29a, 29b...Links, 31...Springs that bias the braking state, 3
5... Cam for stopping the following transport vehicle, 36... Contact surface, 37, 43... Stopper, 38... Sub roller, 39... Cam rail, 41... Cam for stopping the transport vehicle (stopping means).

Claims (1)

[Claims] 1. A carrier movably supported by a guide rail is provided with a rotatable tooth wheel, a braking means for switching the tooth wheel between a fixed state and a rotatable state, and a braking means for biasing the braking means to a braking state. A spring for fixing the gear, an operating means for switching the braking means to a brake release state, and a cam for stopping the following carriage that operates the operating means of the following carriage when the following carriage approaches, and the guide rail On the side, there is a driving means such as a chain that engages with the gears and moves along the guide rail, a conveyance vehicle stopping means that operates the operating means in the same way as the following vehicle stopping cam, and A trolley-type asynchronous transport device comprising: a cam rail that continuously holds the braking means in a brake-released state via the operating means to enable free movement of the transport vehicle.