JPH0114537Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a floor conveyor device that transports objects such as automobile bodies through a carrier.
That is, a front trolley and a rear trolley guided by a trolley guide rail are connected by a carrier, a drive chain guide rail is disposed below the trolley guide rail, and a drive chain guided by the drive chain guide rail is connected. This invention relates to a floor conveyor device equipped with a chain.

FIG. 1 shows a conventional floor conveyor device. That is, reference numeral 1 denotes a pair of left and right trolley guide rails, and a front trolley 2 and a rear trolley 3 supported and guided by these rails are connected by a carrier 4, and the carrier 4 supports an object 5 to be transported. A pair of left and right drive chain guide rails 6 are disposed below the trolley guide rail 1, and a drive protrusion 8 is connected upwardly from a proper position of the drive chain 7 supported and guided by the rails 6. The front trolley 2 is provided with an elevating body 9 that can be raised and lowered within a certain range, and a passive protrusion 10 that can be engaged with and detached from the drive protrusion 8 is integrally provided at the middle part of the lower surface of the elevating body 9, and a passive protrusion 10 that can be engaged with and detached from the driving protrusion 8 is provided at the rear of the lower surface. A runaway prevention protrusion 11 is integrally provided. Further, an actuating portion 12 extending forward is formed at the front portion. Further, a cam tail 13 is provided at the rear end of the rear trolley 3 and is capable of pushing up the operating portion 12.

In the above conventional configuration, the elevating body 9 descends,
With the drive protrusion 8 engaged with the passive protrusion 10, the carrier 4 receives the driving force from the drive chain 7 and moves integrally. At that time, runaway on the carrier 4 side is caused by the runaway prevention protrusion 11 against the drive protrusion 8.
This is prevented by the engagement of the two. Then, the actuating part 12 acts on the cam tail 13 on the carrier 4 side, which is stopped in advance, and pushes it up, and as the elevating body 9 rises, the passive protrusion 10 comes off from the drive protrusion 8, and the non-drive storage state is established. become. Further, after the preceding carrier side has traveled, the elevating body 9 is lowered, and is in a state where passive traveling is possible.
Therefore, the moving drive protrusion 8 first acts on the runaway prevention protrusion 11 to raise the elevating body 9, and
By climbing over the runaway prevention protrusion 11, the elevating body 9 descends, the driving protrusion 10 engages with the passive protrusion 8, and the elevating body 9 is moved again.

Incidentally, the floor conveyor device is installed in a harsh zero-air environment. For example, when disposed in a painting line or the like, scattered paint adheres to the elevating body 9, making the vertical movement of the elevating body 9 slow. Therefore, when attempting to run again, the drive protrusion 8 acts on the runaway prevention protrusion 11 to raise the elevating body 9, and after the drive protrusion 8 passes over the runaway prevention protrusion 11, the elevating body 9 is lowered. This is done slowly, and the driving projection 8 passes before engaging the passive projection 10. Passage occurs frequently, especially when the drive chain 7 is driven at high speeds. Due to these reasons, re-running cannot be carried out as specified. Furthermore, each time the vehicle is run again, the drive protrusion 8 collides with the runaway prevention protrusion 11, and the elevating body 9 rises and descends (falls), thereby generating noise.

An object of the present invention is to provide a floor conveyor device in which the driving protrusion can always be reliably engaged with the driven protrusion for retravelling with little noise.

In order to achieve the above object, the floor conveyor device of the present invention is provided with an elevating body that can be raised and lowered within a certain range on the front trolley, a passive protrusion is provided at the center of the lower surface of this elevating body, and a vertically swinging body is provided at the rear of the lower surface. Furthermore, an actuating part extending forward is formed at the front of the elevating body, and a cam tail that can push up the actuating part is provided at the rear end of the rear trolley, and the passive A driving protrusion that can be engaged with the protrusion is provided.

According to the configuration of the present invention, the following effects can be expected. That is, when the elevating body has descended and is ready to run again, the driving protrusion that has moved together with the drive chain first collides with the runaway prevention protrusion, causing only the runaway prevention protrusion to swing upward. The driving projection does not rise, so that the driving projection can always be reliably engaged with the driven projection, and retravel can always be performed reliably. Furthermore, since the runaway prevention protrusion escapes (swings) when the drive protrusion collides with the drive protrusion, and the elevating body does not move up and down, the noise generated when engaging for re-travel can be reduced compared to the conventional type.

An embodiment of the present invention will be described below based on FIGS. 2 to 4. The front trolley 2 is supported and guided by the trolley guide rail 1 via support rollers 14 and lateral vibration prevention rollers 15. Further, the elevating body 9 is guided up and down by the front trolley 2 via an elongated hole 16 and a pin 17 in the vertical direction. A runaway prevention protrusion 11 is attached to the rear part of the lower surface of the front trolley 2 via a horizontal pin 18 so as to be able to swing up and down, and the lower limit of the runaway prevention protrusion 11 is regulated by a stop surface 19 formed on the front trolley 2. . Note that the rear trolley 3 is also supported and guided by the trolley guide rail 1 via a support roller 20 and a lateral vibration prevention roller 21.

The solid line in FIG. 2 shows the running state in which the driving protrusion 8 is engaged with the passive protrusion 10. Such runaway during running is prevented by abutting the runaway prevention protrusion 11 against the drive protrusion 8. When the preceding carrier is stopped, the operating portion 12 rides on the cam rail 13, and the elevating body 9 is raised. As a result, as shown in FIG. 3, the passive protrusion 10 rises and separates from the driving protrusion 8, thus becoming in a non-passive state. When the preceding carrier runs, the cam rail 13 comes off from the actuating part 12, so the elevating body 9 descends, and its passive protrusion 10 engages with the driving protrusion 8.
The vehicle enters the travel path of the vehicle and becomes ready to travel again. In this state, the next moving driving protrusion 8 collides with the runaway prevention protrusion 11, causing the runaway prevention protrusion 11 to swing upward around the horizontal pin 18 as shown by the imaginary line in FIG. At this time, since the elevating body 9 does not rise, the drive protrusion 8 that has passed through the runaway prevention protrusion 11 is reliably engaged with the passive protrusion 10, and is then moved again.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing a conventional example, Figs. 2 to 4 show an embodiment of the present invention, Figs. 2 and 3 are partially cutaway side views of essential parts, respectively, and Fig. 4 is a front view in FIG. 2; 1... Trolley guide rail, 2... Front trolley, 3... Rear trolley, 4... Carrier, 5...
...Transferred object, 6...Drive chain guide rail, 7
... Drive chain, 8 ... Drive projection, 9 ... Elevating body, 10 ... Passive projection, 11 ... Runaway prevention projection,
12... Actuation part, 13... Cam tail, 18...
horizontal pin.

Claims (1)

[Scope of utility model registration request] A front trolley and a rear trolley guided by a trolley guide rail are connected by a carrier, a drive chain guide rail is disposed below the trolley guide rail, and a drive chain guided by the drive chain guide rail is connected. In the floor conveyor device, the front trolley is provided with an elevating body that can be raised and lowered within a certain range, a passive protrusion is provided at the middle part of the lower surface of the elevating body, and a runaway prevention protrusion that is vertically swingable is provided at the rear of the lower surface. A cam tail is provided at the rear end of the rear trolley to push up the actuating part, and a cam tail is provided at the rear end of the rear trolley to engage with the drive protrusion at an appropriate position of the drive chain. A floor conveyor device characterized by being provided with drive protrusions that can be combined.