JPH08246413A - Clogging preventive mechanism of bar feeder chain - Google Patents

Abstract

PURPOSE: To prevent the clogging of a bar feeder chain by forming notch sections to a fixed baseplate placed at the lower end of the bar feeder chain at regular intervals. CONSTITUTION: When a hydraulic motor 12 is driven, a driving sprocket wheel 4A coupled through a driving mechanism is rotated and driven. A bar feeder chanin 3 stretched between the driving sprocket wheel 4A and a following sprocket wheel 4B is moved forward on a fixed baseplate 2. When an asphalt plied timber is charged to a bar feeder device 10 from a hopper, the asphalt plied timber is shifted and carried on the fixed baseplate 2 by the bar feeder chain 3. The asphalt plied timber intruding into the chain 3 from clearances among the front end sections of chain covers 9 and the bar feeder chain 3 falls to a lower section at the places of each notch 2a formed to the fixed baseplate 2 and is removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clogging preventing mechanism for a bar feeder chain of a bar feeder device equipped on an asphalt finisher used for laying an asphalt mixture in asphalt pavement work.

[0002]

2. Description of the Related Art Asphalt finishers used in asphalt pavement work are shown in FIGS. This machine drives the crawler 21a to drive the vehicle body 21 in the direction of arrow a, while sending the asphalt mixture fed into the hopper 7 from a dump truck (not shown) to the rear auger device 23 by the bar feeder device 20,
In the auger device 23, the asphalt mixture is evenly spread to the left and right, and the asphalt mixture is spread evenly on the road surface by a screed device 25 suspended behind the support arm 24. The vibrator device 25a is configured to compact the spread asphalt mixture.

As shown in FIG. 7, the bar feeder device 20 is arranged directly below the bar feeder chains 3 and 3 wound around a drive sprocket wheel 4A and a driven sprocket wheel 4B, and a chain on the conveying side. Both ends of the fixed base plate 2 and the bar feeder chains 3 and 3 are appropriately spaced at intervals in the length direction.
Is fixed to the fixed base plate 2 and is slid on the fixed base plate 2. The asphalt mixture put into the hopper 7 moves on the fixed base plate 2 and moves to the bar feeder device 20. It is designed to fall from the exit side to the rear of the vehicle body 21 (FIG. 6).

[0004]

Bar feeder device 20
In order to prevent the bar feeder chains 3 and 3 from being buried in the asphalt mixture 6 at the time of transportation, as shown in FIG. 8, the chain cover 9, so as to cover the upper side of the bar feeder chain 3 on the transportation side, 9 is provided. However, even if it is covered with the chain covers 9 and 9, it is difficult to completely seal the bar feeder chains 3 and 3. This is because it is necessary to provide a space corresponding to the height of the bar 5 between the tip ends of the chain covers 9 and 9 and the fixed base plate 2, so that the asphalt mixture carried by the bar 5 is mixed. 6 is a chain cover 9,
This is because it easily enters through the gap between the tip portion of 9 and the bar feeder chains 3, 3.

The asphalt mixture 6 entered through this gap is fixed to the lower side of the bar feeder chains 3 and 3 by the fixed base plate 2.
Due to the position of the bar feeder, it is received inside the bar feeder chains 3 and 3 and stays there. The asphalt mixture 6 accumulated inside the bar feeder chains 3 and 3 is a drive sprocket wheel 4A and a driven sprocket wheel 4B provided on the front and rear ends of the fixed base plate 2.
The teeth of the machine may mesh and be pushed out, but if they adhere to the inside of the bar feeder chains 3 and 3 and solidify, they will become clogged and the fixed base plate 2 and the bar feeder chains 3 and 3 will rub against each other. As a result, each wear is accelerated. In addition, the drive sprocket wheel 4A and the driven sprocket wheel 4B that mesh with the clogged bar feeder chains 3 and 3 are quickly worn, resulting in poor meshing and, in some cases, disengagement.

The present invention solves the above-mentioned problems of the conventional bar feeder device, and enables the asphalt mixture to be removed in the course of conveyance even if the asphalt mixture enters the inside of the bar feeder chain during conveyance. It is an object of the present invention to provide a clogging prevention mechanism for a bar feeder chain that does not solidify by sticking materials.

[0007]

In order to achieve the above object, the present invention provides a fixing base plate extending from a lower end side of an opening of a hopper provided at a front portion of a vehicle body to a rear end side of the vehicle body, and a fixing base plate. A bar feeder chain that is wound around a drive sprocket wheel and driven sprocket wheels that are provided on the left and right sides of the front and rear ends of the base plate, and slides on the fixed base plate in the longitudinal direction of the bar feeder chain. In the bar feeder device of the asphalt finisher, which comprises a plurality of bars attached to the hopper at appropriate intervals, and moves the asphalt mixture fed into the hopper to the rear side of the vehicle body by moving on the fixed base plate, the bar feeder. The clogging prevention mechanism of the bar feeder chain is characterized in that notches are formed at predetermined intervals on a fixed base plate located below the chain. In this case, it is effective to make the notch depth of the notch formed in the fixed base plate at a position where the inner chain group slides on the fixed base plate at least with the roller of the bar feeder chain sandwiched therebetween. Further, the length of the notch formed in the fixed base plate in the front-rear direction is more effective if at least one pitch between the rollers adjacent to each other in the length direction of the bar feeder chain is 1 pitch. Is.

[0008]

According to the invention described in claim 1, the notch formed in the fixed base plate causes the asphalt mixture that has entered the inside of the bar feeder chain to drop in the course of conveyance.
Remove. Further, according to the invention described in claim 2, one of the bar feeder chains, that is, the chain group on the inner side of the bar feeder chain, always moves while being mounted on the fixed base plate. Further, according to the invention described in claim 3, by selecting the notch formed in the fixed base plate to have a predetermined size, it is possible to efficiently prevent clogging.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a bar feeder device equipped with a clogging prevention mechanism for a bar feeder chain according to the present invention, and FIG.
FIG. 2 is a side sectional view of FIG. With reference to FIGS. 1 and 2, a hopper 7 is arranged at the front part of the vehicle body 1, and the asphalt mixture 6 put into the hopper 7 is conveyed to the rear (right side in the drawing) by a bar feeder device 10. . The bar feeder device 10 constitutes an asphalt finisher together with an auger device and a screed device which are not shown.

The bar feeder 10 includes a fixed base plate 2 and
The bar feeder chains 3 and 3 and the bar 5 are provided. The fixed base plate 2 has a rectangular shape extending from the lower end side of the opening of the hopper 7 to the rear end side of the vehicle body 1 and is attached to the frame 11 via a plurality of channels 11a. The bar feeder chains 3 and 3 include a drive sprocket wheel 4A and a driven sprocket wheel 4B provided on the front and rear ends of the fixed base plate 2.
The drive sprocket wheel 4 </ b> A, which is connected between the hydraulic motor 12 and the hydraulic motor 12 via the transmission mechanism 13, is rotationally driven to travel on the fixed base plate 2. The bar 5 is a square rod-shaped member fixed to the bar feeder chains 3 and 3 at appropriate intervals in the length direction of the bar feeder chains 3 and 3, and the fixed base plate 2 is associated with the rotational driving of the bar feeder chains 3 and 3.
Move while sliding on the top.

The asphalt mixture 6 charged from the hopper 7 is fixed to the fixed base plate 2 by the bar feeder device 10 described above.
It moves up and is carried out to the rear side of the vehicle body 1, and is evenly laid out and compacted by an auger device and a screed device (not shown).

In order to prevent the bar feeder chains 3 and 3 from being buried in the asphalt mixture 6, the bar feeder device 10 covers the upper side of the bar feeder chain 3 on the carrying side so as to cover the upper side. 9 is provided. The chain covers 9 and 9 are mounted on the frame 11 via the bracket 14 (see FIG. 4).

A plurality of cutouts 2a are formed at predetermined intervals at positions where the bar feeder chains 3 and 3 pass on both sides of the fixed base plate 2. Here, the predetermined interval is specifically 5 to 7 of the size (H) of the cutout 2a.
It means about twice the interval. As shown in FIG. 3, it is desirable that the notch portion 2a be located at a position where the inner chain group 3a slides on the fixed base plate 2 at least with the roller 3c of the bar feeder chain 3 interposed therebetween. Let it form. That is, the inner chain group 3a is formed so as to be located on the fixed base plate 2 with the roller 3c sandwiched therebetween, and the outer chain group 3b is located so as to be located on the cutout portion 2a with the roller 3c sandwiched therebetween. Further, the length (H) of the notch 2a in the front-rear direction is at least 1p between the rollers adjacent to each other in the length direction of the bar feeder chain 3 chain.
It is effective that the (pitch) has a size of 1 pitch or more.

In the bar feeder chains 3 and 3, at the positions of the notches 2a formed in the fixed base plate 2 at predetermined intervals,
As the lower portion is opened, as shown in FIG. 4, the asphalt mixture 6a that has entered the inside of the bar feeder chain 3 through the gap between the tip of the chain cover 9 and the bar feeder chain 3 is At the position of the notch 2a, it falls down and is removed. In this case, one of the bar feeder chains 3, that is, the inner chain group 3a sandwiching the roller 3c is configured to always move while being on the fixed base plate, so that the bar portion is formed at the edge of the cutout 2a. Stable work can be performed without the feeder chain 3 being caught and causing a malfunction. Furthermore, by selecting the notch 2a to have a predetermined size, the asphalt mixture 6 that has entered the inside of the bar feeder chain 3 can be obtained.
Since a falls naturally, clogging can be efficiently prevented.

The cutout portion 2a formed in the fixed base plate 2
The shape of is not limited to that shown in the figure, and the lower part of the bar feeder chain 3 may be opened at that position, and for example, a hole may be formed.

[0016]

As is apparent from the above description, according to the present invention, the fixed base plate located below the bar feeder chain of the bar feeder device is provided with the notches at predetermined intervals. The bar feeder chain traveling on the fixed base plate drops and removes the asphalt mixture that has entered the inside of the bar feeder chain at the positions of the notches. Therefore, it is possible to prevent the clogging state in which the asphalt mixture is adhered and hardened inside the bar feeder chain. As a result, it is possible to suppress the abrasion due to the friction between the fixed base plate and the bar feeder chain, which has been apt to occur in the past, and to constantly engage the bar feeder chain with the drive sprocket wheel and the driven sprocket wheel. There is an effect that can be maintained well.

[Brief description of drawings]

FIG. 1 is a plan view of a bar feeder device equipped with a clogging prevention mechanism for a bar feeder chain according to the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a partially enlarged view of FIG.

FIG. 4 is a cross-sectional view of a bar feeder device equipped with a clogging prevention mechanism for a bar feeder chain according to the present invention.

FIG. 5 is a side view of a general asphalt finisher.

6 is a plan view taken along the line VI-VI of FIG.

FIG. 7 is a perspective view of a general bar feeder device.

FIG. 8 is a cross-sectional view of a conventional bar feeder device.

[Explanation of symbols]

 1 ... Vehicle body 2 ... Fixed base plate 2a ... Notch portion 3 ... Bar feeder chain 3a ... Inner chain group 3b ... Outer chain group 3c ... Roller 4A ... Drive sprocket wheel 4B ... Driven sprocket wheel 5 ... Bar 6 ... Asphalt mixture 7 ... Hopper 9 ... Chain cover 10 ... Bar feeder device 11 ... Frame 12 ... Hydraulic motor

Claims (3)

[Claims] 1. A fixed base plate extending from a lower end side of an opening of a hopper arranged in a front part of the vehicle body to a rear end side of the vehicle body, drive sprocket wheels provided on both left and right sides of front and rear end sides of the fixed base plate, and a driven body. The hopper includes: a bar feeder chain wound around a sprocket wheel; and a plurality of bars that slide on the fixed base plate and are attached at appropriate intervals in the length direction of the bar feeder chain. In the bar feeder device of the asphalt finisher that moves the asphalt mixture injected into the fixed base plate to the rear side of the vehicle body, the fixed base plate located below the bar feeder chain, at predetermined intervals. A mechanism for preventing clogging of a bar feeder chain that has a notch. 2. A notch depth of a notch formed in the fixed base plate is formed at a position where an inner chain group slides on the fixed base plate at least with a roller of a bar feeder chain sandwiched therebetween. Bar feeder chain clogging prevention mechanism described in. 3. The length of the notch formed in the fixed base plate in the front-rear direction is set to be at least one pitch, with at least one interval between adjacent rollers in the length direction of the bar feeder chain being one pitch. The clogging prevention mechanism for a bar feeder chain according to claim 1 or 2.