JPS6145209Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a trolley device in an asphalt plant.

The trolley device in an asphalt plant is installed below the mixer and transports the asphalt mixture mixed by the mixer to the silo installed around the mixer or to a conveyance device such as a skip device attached to the silo. The one shown in FIG. 1 has been known for some time.

This trolley device 1 is installed with a space provided so that a passage 5 is formed below a trolley frame 3 and a mixer 4, which is erected at the arrival and departure position of a bucket cart 2a of a conveyance device 2, which is called a skip device. A mixer frame 6 of the asphalt plant, a rail 7 fixedly constructed below the mixer 4 by these frames 3 and 6, and a rail 7 by which the bucket 2a is brought in and out from a position below the mixer 4. The hopper 8 is equipped with a hopper 8 that is guided and moved to an upper position, and a drive device 9 that makes the hopper 8 run along a rail 7. It is transported to the bucket 2a.

By the way, when designing a new asphalt plant, as shown in FIG. , and the height position of the mixer 4 is set so that the space secured below the mixer 4 is larger than the vehicle height of the vehicle 10.
Trolley device 1 as mentioned above is installed for expansion etc.
When this is added to an existing asphalt plant, the space secured below the mixer 4 becomes smaller than the originally set value by the amount of the rail 7 installed below the mixer 4.
There may be inconveniences in entering and exiting.

As a countermeasure in such a case, the existing mixer 4 may be relocated to a higher position, or the road surface of the passageway 5 may be dug down, thereby making it possible to install a predetermined area below the mixer 4. Although it is possible to secure space, various devices for supplying aggregate and asphalt to the mixer 4 are already installed above the mixer 4, and on the other hand, the passage 5 should be firmly formed with concrete or the like. As a result, the remodeling work would be so large-scale that it would be difficult to implement in practice, and it would not be economically viable.

This invention was proposed in view of the above-mentioned circumstances, and aims to provide a trolley device that does not reduce the space below the mixer in an asphalt plant and does not cause any inconvenience in moving conveyance vehicles in and out of the mixer below. purpose.

The present invention will be explained below based on an embodiment shown in FIGS. 2 to 4.

As shown in FIG. 2, the trolley device 12 of the present invention has a trolley frame 13 installed at the starting and landing position of the bucket cart 2a of the conveying device 2, and a passage 5 formed below the mixer 4 of the asphalt plant. A mixer frame 14 of an asphalt plant installed with a space provided, a rail 15 constructed below the mixer 4 by these frames 13 and 14 and movable in the longitudinal direction, and a rail 15 that is movable in the longitudinal direction. A hopper 16 is supported along the rail 15 so as to be movable relative to the rail 15, and guided and moved along the longitudinal direction of the rail 15 from a lower position of the mixer 4 to an upper position of the loading/unloading position of the bucket cart 2a. The structure includes a drive device 17 for driving the vehicle.

The rail 15 includes a pair of vertical members 15a, 15 having a U-shaped cross section and arranged in parallel with an appropriate interval.
a are connected by a plurality of horizontal members 15b, . . . arranged in parallel at intervals, and the vertical members 15
a, 15a are each frame 1 as shown in FIG.
It is supported so as to be horizontally movable by a plurality of pairs of upper and lower guide rollers 18a and 18b which are pivotally supported by rollers 3 and 14.

As shown in FIG. 3, in the drive device 17, a pair of rotating shafts 19 disposed at the front and rear portions of the upper end of the hopper 16 are rotatably supported by bearings 16b fixed to the machine frame 16a of the hopper 16. Each rotating shaft 1
The rollers 20, 20 fixed to both ends of the rail 15 are the guide surfaces 15c,
The sprocket 21 attached to the output shaft of the electric motor 21 is supported by the electric motor 21 attached to the machine frame 16a of the hopper 16.
a, a sprocket 19a attached to one of the rotating shafts 19 (driving rotating shaft), and a chain 19b wound around both sprockets 19a, 21a to rotate the driving rotating shaft 19. It is designed to drive the rollers (drive rollers) 20, 20 of the shaft 19, and if the rail 15 is fixed to the frames 13, 14, it functions as a hopper running device, and the hopper 16 is used as If it is fixed to the frame 13 by the stop means, it functions as a rail movement.

A switch operating section 15d is protruded from the top of the tip end side (right end side in FIG. 2) of the rail 15, and on the other hand, a pair of limit switches operated by the switch operating section 15d are provided on the mixer frame 14. 22 and 23 are provided at a predetermined distance (distance corresponding to the movement distance L of the rail 15) in the longitudinal movement direction of the rail 15, and the position of the rail 15 is detected by these limit switches 22 and 23. Along with the limit switch 22,
The output signal from 23 is used for controlling the electric motor 21 during rail movement.
Similarly, when the hopper 16 is located below the mixer 4, this is detected by the limit switch 24 attached to the mixer frame 14 or the rail 15, and the hopper 16 is located above the starting and landing position of the bucket 2a. If you are located in
This is detected by a limit switch (not shown) attached to the trolley frame 13,
Output signals from these limit switches are used to control the electric motor 21 during hopper travel.

The locking means for fixing the rail 15 and the hopper 16 to the frame are attached to the trolley frame 13, as shown in FIG. a second locking means 26 attached to the mixer frame 14 for fixing the rail 15 to the mixer frame 14;
It is composed of. These locking means 25,
26 is connected to each frame 13, 14 by an air cylinder attached to each frame 13, 14, respectively.
The rods 25a, 26a are slidably inserted in the axial direction into guide members 25b, 26b fixed to the horizontal members 13a, 14a, and are moved back and forth in the direction of arrow A.
Correspondingly, the tip of the rail 15 and the hopper 16
As shown in FIG. 2, the protruding piece 16c fixed to the
Engagement hole 1 that engages with the rail fixing rod 26a
5e and an engagement hole 16d that engages with the hopper fixing rod 25a is formed. Both locking means 2
5, 26 operate in conjunction with each other to alternatively fix the rail 15 or hopper 16 to the frames 13, 14. For example, in a normal case, that is, when asphalt mixture is transported by the hopper 16, as shown in FIGS. 2 and 4,
Only the rail 15 is fixed to the frame 14 by the engagement between the rail fixing rod 26a and the engagement hole 15e of the rail 15. On the other hand, when moving the rail 15, the hopper 16 is Second
At a position above the bucket cart 2a shown by the two-dot chain line in the figure, the trolley frame 1
3, and the fixation of the rail 15 is released.

When the trolley device 12 having such a configuration is used to transport the asphalt mixture mixed by the mixer 4 by a transport vehicle such as a dump truck, first, as shown in FIG. 26
When the rod 26a is inserted into the locking hole 15e of the rail 15 and the drive device 17 is operated with the rail 15 fixed to the mixer frame 14, the drive roller 20 is rotated by the electric motor 21. Since it rolls on the rail 15, the hopper 16
moves along the rail 15 and is brought to the starting and landing position of the bucket cart 2a. Next, the first locking means 25 is operated to insert the rod 25a into the locking hole 16c of the hopper 16 to fix the hopper 16 to the trolley frame 13 as shown in FIG. When the locking means 26 is operated in the opposite direction to the above to release the fixation of the rail 15 and the drive device 17 is operated again, the drive roller 20 driven by the electric motor 21 moves the rail 15 toward the trolley frame 13. move it to Thereby, the rail 15 can be retracted from below the mixer 4.

With the rail 15 retracted from below the mixer 4, the transport vehicle is pulled into the space below the mixer 4, and the asphalt mixture from the mixer 4 is directly loaded onto the transport vehicle and transported to a predetermined location.

According to the above, even when the trolley device 12 is added to an existing asphalt plant, when the asphalt mixture is transported by the conveyance vehicle, the rail 15 is retracted so that it is initially placed below the mixer 4. space can be secured, and there is no need to carry out large-scale remodeling work on the existing plant, and there will be no inconvenience in getting conveyance vehicles in and out of the mixer below.

Moreover, the above-mentioned trolley device 12 has the rail 1
5 is avoided, and the drive device 17, which was originally provided for moving the hopper 16, is configured to be used both for moving the hopper 16 and for moving the rail 15. Compared to the conventional trolley device 1, adding the movement function of the rail 15 does not significantly increase manufacturing costs.

In the above-mentioned embodiment, the drive device 17 uses an electric motor 2 attached to the hopper 16 to drive the drive roller 20 that supports the hopper 16 on the rail 15 and rolls.
1, the configuration is not limited to such a configuration. For example, as shown in FIGS. Connect the end of the rod 27b of the cylinder device 27 to the hopper 1.
6, or as shown in FIG. 8, an endless chain 28 with both ends joined at the front and rear of the hopper 16 is stretched over sprockets provided at the front and rear ends of the rail 15, and the chain 28 is fixed to the rail 15 side. Various configurations can be considered, such as a configuration in which the chain 28 is driven by an attached electric motor 29.

Furthermore, one of the frames supporting the rail 15 is
The trolley frame 13 is provided separately from the mixer frame of the asphalt plant.
It may be configured to protrude laterally as part of the.

As explained above, the trolley device of the present invention is installed below the mixer of an asphalt plant, and the rail supporting the hopper for conveying the asphalt mixture discharged from the mixer to the outside of the asphalt plant is attached to the frame of the asphalt plant. The hopper is supported movably in the running direction of the hopper, and is movable relative to the hopper by a drive device that runs the hopper along the rail. Locking means are provided for selectively locking the rail or the hopper. Therefore, if the drive device is operated with the rail fixed to evacuate the hopper from below the mixer, and then the drive device is operated with the hopper fixed to evacuate the rail from below the mixer, the mixer can be moved. Since it is possible to secure sufficient space to accommodate the transport vehicle transporting the asphalt mixture without any obstacles below, the overall height of the asphalt plant can be reduced compared to the case where the asphalt plant is manufactured with the above obstacles in mind. The height can be lowered, and manufacturing and installation can be done easily. Further, even when adding a trolley device to an existing asphalt plant, there is no need to first perform large-scale remodeling work on the existing asphalt plant, and there will be no inconvenience in getting the transport vehicle in and out of the mixer below.

Moreover, it is possible to avoid installing a dedicated drive device for moving the rails, and instead use the drive device originally designed for running the hoppers to be used for both running the hoppers and moving the rails. Compared to other devices, adding the rail movement function does not significantly increase production costs.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional trolley device, and Figs. 2 to 4 show an embodiment of the present invention.
The figure is a front view, FIG. 3 is a sectional view taken along the - line in FIG. 2, FIG. 4 is a view taken from the direction of the arrow in FIG. 2, and FIGS. FIG. 7, and FIG. 8 are explanatory diagrams each showing an embodiment of a drive device applied to the present invention. 12... Trolley device, 13... Trolley frame, 14... Mixer frame, 19... Rotating shaft, 20... Roller.

Claims (1)

[Scope of utility model registration request] comprising a rail constructed below the mixer by a frame, a hopper guided by the rail from the lower position of the mixer to a predetermined position, and a drive device for driving the hopper to travel along the rail, A trolley device for an asphalt plant that transports asphalt mixture mixed by a mixer to a predetermined position by a hopper, wherein the rail is movably constructed relative to the frame in the running direction of the hopper, and the 1. A trolley device for an asphalt plant, characterized in that the trolley device is movable relative to the hopper by a drive device, and the frame is provided with locking means for selectively locking the rail and the hopper.