JPH022729Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is installed in a leveling machine such as an asphalt finisher, and feeds asphalt mixture in a hopper equipped with the leveling machine to the road surface. The present invention relates to a bar feeder device.

``Prior Art'' In general, asphalt finishing machines and other paving machines prepare asphalt mixture in a hopper attached to the front of the vehicle body to the rear of the vehicle body using a bar feeder device while the vehicle body is traveling. The asphalt mixture is sent to a spreading screw, which spreads the asphalt mixture evenly on the road surface from side to side, and it is spread flat by a screed.

The bar feeder device is installed along a conveyance groove formed from the front to the rear of the vehicle body, and has a structure as shown in FIGS. 8 and 9, for example. That is, two sets of drag pans 3 attached to the body frame 2 of the traveling vehicle body 1 and a conveyor bar 4 that moves in contact with the upper surface of the drag pans 3 are separated by a predetermined distance between two endless chains 5. The asphalt composite material received in the hopper 7 is conveyed over the drag pan 3 from the front to the rear of the traveling vehicle body 1 by the conveyor bar 4.

By the way, regarding the bar feeder device,
In order to smoothly transport the asphalt mixture received in the hopper 7, it is important that the transport bar 4 is held in contact with the upper surface of the drag pan 3. Since the chain 5 may sag due to the heat of the asphalt mixture, it is required to have a structure that applies tension to the endless chain 5 against the sagging of the endless chain 5.

For this reason, this type of bar feeder device has a basic structure in which a support shaft 8 around which an endless chain 5 is wound is supported movably in the longitudinal direction of the vehicle body frame 2. 9
As shown in the figure, bearings 9 at both ends of the support shaft 8 of each conveyor belt 6 are supported by the vehicle body frame 2 so as to be movable back and forth, and each of these bearings 9 is attached to the front of the vehicle body frame 2 (left side in FIG. 8). A threaded rod 10 is provided which extends to the vehicle body frame 2, and a nut 11 screwed onto the threaded rod 10 allows the bearing 9 to be moved back and forth with respect to the vehicle body frame 2.

"Problems to be Solved by the Invention" However, in the bar feeder device of such a conventional structure, the threaded rod 10 that moves each bearing 9 back and forth is located at the front of the vehicle body frame 2, so this part is The length of the covering apron 12 becomes longer, and as a result, the asphalt mixture that falls on the apron 12 gradually accumulates, and after the work is finished, the asphalt mixture remaining on the apron 12 must be manually removed. However, there was a problem in that the cleaning work required a considerable amount of effort and time. Moreover, in a bar feeder device in which two sets of left and right conveyor belts 6 are provided, the mutually adjacent ones of the endless chains 5 are located in the center of the bottom plate part of the hopper 7, so the endless chains 5 are installed in this part. A cover 13 is provided to cover the vehicle body frame 2, and two bearings 9 supporting the left and right support shafts 8 are located in the center of the vehicle body frame 2.
The width of the cover 13 tends to increase, and asphalt mixture tends to accumulate on the cover 13, which makes cleaning work troublesome and spreads over a wide area in the center of the width direction of the vehicle body. There were problems such as areas where the asphalt mixture could not be fed backwards, making it difficult to pave uniformly.

The purpose of the present invention is to provide a bar feeder device for leveling machines, etc., which can reduce the amount of asphalt mixture remaining in the hopper, achieve uniform paving, and save labor for cleaning work. be.

``Means for solving the problem'' The present invention provides a support shaft around which two endless chains of two sets of left and right conveyor belts are wound around the front part of the vehicle body frame, and both ends of the support shaft are It is supported by a pair of left and right bearings that are supported on both left and right sides of the vehicle body frame so as to be movable in the front and back direction, and the center portion of the support shaft is supported in the widthwise center portion of the body frame so as to be movable in the front and rear direction. The left and right bearings are further provided with threaded rods that extend along the rear of the vehicle body frame and move the bearings back and forth, and the center bearings are provided with threaded rods that extend through the support shaft from the front of the vehicle body frame. The structure is such that the adjustment bolt is screwed together.

"Operation" In the conveyance band of the bar feeder device having the above configuration, the conveyed object in the hopper is carried out from the hopper by the conveyance bar and is transferred along the drag pan, but the support shaft around which the endless chain is wound is aligned on the left and right sides. The width occupied by the central bearing has become smaller.
In addition, the longitudinal movement of the bearings at both ends is adjusted by threaded rods extending to the rear of the vehicle body frame, so the width of the center cover and the length from the front and rear frames of the vehicle body frame to the conveyor belt are adjusted. Since the hopper can be made smaller and the auxiliary apron etc. can be omitted, the asphalt mixture in the hopper can be transported without being deposited on the apron cover.

``Embodiment'' Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 7. This bar feeder device has its front end exposed at the bottom of the hopper 7, and the front and rear surfaces of the traveling vehicle body. 1 and 2.
As shown in the figure, there are two sets of drag pans 15 and a conveyor belt 1 disposed on each of these drag pans 15.
It consists of 6.

The drag pans 15 are arranged in two sets parallel to each other along the width direction of the vehicle body frame 17, and each set extends from the hopper 7 to the spreading screw. The configuration is such that conveyor bars 19 are installed between them at predetermined intervals. and,
The endless chain 18 of the conveyor belt 16 is constructed by a support shaft 20 provided at the front of the vehicle body frame 17 and a drive shaft 21 at the rear of the vehicle body frame 17.
The sprocket wheel 2 of the drive shaft 21 is stretched from the front to the rear of the vehicle body frame 17.
With the conveyor bar 19 in contact with the upper surface of the drag pan 15, the object to be conveyed, such as asphalt mixture, in the hopper 7 is moved along the drag pan 15. In Figure 1, it is designed to be transferred from left to right.

Further, to explain the support shaft 20, as shown in FIG.
are wound around each other via a collar 23, with both ends protruding from both side plates 17a of the vehicle body frame 17, and left and right bearings 24, 2.
5, and the central portion is supported by a central bearing 26.

Here, as shown in FIG.
a, and each bearing 24, 25 is provided with a threaded rod 27 extending toward the rear of the vehicle body frame 17.
is supported by the vehicle body frame 17 via a bracket 28 provided on a side plate 17a of the vehicle body frame 17.

This threaded rod 27 has two nuts 2 located between the bearing 24 and the bracket 28.
9 and 29 are screwed together, and by turning these nuts 29 and 29, the amount of movement of the bearing 24 in the front and rear direction is adjusted.

On the other hand, as shown in FIG. 4, the front central bearing 26 has a through hole 30 through which the support shaft 20 passes, and a through hole 30 that communicates with the through hole 30 and extends in the front-rear direction (horizontal direction in FIG. 4). A bolt hole 31 is formed, and a female thread 31a is provided in a part of the bolt hole 31 (the right half in FIG. 4). The female thread 31a of this bolt hole 31 is inserted through the front frame 17b of the vehicle body frame 17.
An adjustment bolt 33 inserted into the bolt hole 31 and the communication hole 32 of the support shaft 20 is screwed together, and by rotating the adjustment bolt 33, the amount of movement of the central bearing 26 back and forth can be adjusted. There is.

In the figure, reference numeral 35 indicates an apron that covers the front part of the conveyance belt 16, and 36 indicates a cover that covers the endless chain 18.

Next, the operation of the bar feeder device configured as described above will be explained.

In the asphalt finisher equipped with the device of the present embodiment, asphalt mixture is loaded into the hopper 7 by a dump truck or the like while the vehicle body is running, and the asphalt mixture is transferred to the conveyor bar 19. Drag pan 15
The asphalt is conveyed along the upper surface to the rear of the vehicle, spread evenly on the road surface from side to side using a spreading screw, and then leveled with a screed to form asphalt pavement.

In this case, the conveyor belt 16 of the bar feeder device is
The conveyed object in the hopper 7 is carried out from the hopper 7 by the conveyor bar 19 and is transferred from left to right in FIG. 1 along the drag pan 15. The width occupied by the central bearing 26 is reduced, and the longitudinal movement of the bearings 24 and 25 at both ends is adjusted by threaded rods 27 extending toward the rear of the vehicle body frame 17. As shown in FIG.
Since the length L from the to the conveyor belt 16 can be reduced and the auxiliary apron etc. can be omitted, the asphalt mixture in the hopper 7 can be conveyed without being deposited on the apron 35 or the cover 36. It is. Therefore, the asphalt mixture in the hopper 7 is constantly replaced, and a material with uniform properties is paved, making it possible to perform uniform paving. In addition, in the cleaning work after the work is completed, it is easy to remove the asphalt mixture, so labor savings can be achieved.

By the way, in the work process of the asphalt finisher, when adjusting the tension of the endless chain 18 of the bar feeder device, the nuts 29, 29 screwed to the threaded rod 27 are rotated relative to each other, and the adjustment bolt 33 is turned. good. By this operation, the left and right bearings 24 and 25 move back and forth as the screw rod 27 moves back and forth, and the center bearing 26 moves back and forth due to the left and right rotation of the adjustment bolt 33, and the endless chain 18 moves back and forth. nervous,
Or relax.

"Effects of the invention" As explained above, according to the invention, the left and right support shafts that support the endless chain are unified, the space for the bearing in the center is reduced, and the bearings on the left and right sides of the support shaft are The length of the apron is shortened by extending the screw rod that moves it to the rear of the car body frame, which reduces the amount of mix remaining in the hopper, making it possible to pave uniformly and making work easier. It has excellent effects such as making cleaning work easier after completion and saving labor.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the present invention, in which Figure 1 is a plan view of the bar feeder device, Figure 2 is a side view with a part cut away, and Figure 3 is a dashed line in Figure 2. FIG. 4 is a longitudinal sectional view along the line of FIG. 1, FIG. 5 is a plan view of the front part of the bar feeder device, FIG. 6 is a front view thereof, and FIG. A sectional view taken along the line, FIG. 8 and FIG. 9 show structural examples of a conventional bar feeder device, with FIG. 8 being a plan view and FIG. 9 being a side view. 15...Drag pan, 16...Transport belt, 17...
...Vehicle frame, 17a...Side plate of vehicle body frame, 18...Endless chain, 19...Transport bar, 20...Support shaft, 24...Left bearing, 25...
...Right bearing, 26...Central bearing, 31...Bolt hole, 31a...Female thread, 35...Apron, 36
……cover.

Claims (1)

[Scope of utility model registration request] Two sets of drag pans attached to the body frame of a leveling machine such as an asphalt finisher in parallel with each other in the width direction of the body frame;
A conveyance belt is provided for conveying an object such as asphalt mixture placed on the drag pan to the rear of the vehicle body frame, and the conveyance belt extends parallel to both sides of each drag pan from the front to the rear of the vehicle body frame. In the bar feeder device, the bar feeder device is composed of two endless chains stretched across the body frame, and a plurality of conveyor bars that are installed at a predetermined distance between the endless chains and move while coming into contact with the upper surface of the drag pan. A support shaft around which the two endless chains of each of the conveyance belts are wound is provided at the front part of the support shaft, and both ends of the support shaft are movable along the longitudinal direction on both left and right sides of the vehicle body frame. It is supported by a pair of supported left and right bearings, and its center portion is supported by a central bearing that is supported movably in the longitudinal direction at the center of the vehicle body frame. A threaded rod is provided that extends along the rear of the frame and moves the bearing back and forth, and an adjustment bolt that passes through the support shaft from the front of the vehicle body frame is screwed into the central bearing. Barfeeder device used in leveling machines etc.