JP5517971B2 - Screed device in asphalt finisher - Google Patents

Description

  The present invention relates to a screed device in an asphalt finisher, and in particular, by mounting a formwork slider that slides on the formwork during paving so that it fits in the machine body width, The present invention relates to a screed device in an asphalt finisher that does not require the formwork slider to be removed each time even when a limited cart is used.

  Conventionally, for example, the following asphalt finishers are known. As shown in FIG. 4, this prior art discloses an asphalt finisher 1 as a goose asphalt finisher, and an asphalt mixture (goose asphalt mixture) heated from a cooker truck (not shown) at the front of the machine body 2. A hopper 3 with a heat retaining device is provided for accepting charging. The asphalt composite material received by the hopper 3 is transported to the rear of the machine main body 2 by a screw conveyor 4 as a transport means, and the transported asphalt composite material is spread on the unpaved surface by the spreader 5. It spreads in the direction.

  Behind the spreader 5, a screed 6 for spreading and leveling the spread asphalt mixture is supported at the rear end of the leveling arm 7. A pair of leveling arms 7 are provided on the left and right sides of the machine body 2. The leveling arm 7 is attached to the machine main body 2 through the leveling cylinder 8 at the tip, and the rear side is attached to the machine main body 2 through the scree drift cylinder 9 that is hydraulically free during pavement construction. ing. Further, level rollers 10 for supporting the leveling arm 7 on the unpaved surface are provided at substantially intermediate portions of the leveling arms 7, respectively.

  The level roller 10 supports the weight of the screed 6 and performs paving. The adjustment of the pavement thickness is mainly performed by moving the level roller 10 and the leveling cylinder 8 up and down, and the pavement thickness is determined by the gap height between the screed plate 6a at the lower end of the screed 6 and the unpaved surface. Pavement is performed by pouring asphalt mixture (goose asphalt mixture) into the gap (see, for example, Patent Document 1).

  In addition, as shown in FIG. 4, the goose asphalt mixture as an asphalt mixture has a good fluidity, so that it prevents the edge mixture from flowing and deforming when spreading. A mold 11 having a thickness corresponding to the thickness is installed. Then, paving is performed while sliding the end portion of the screed plate 6a on the mold 11. However, when pavement construction in which the end portion of the screed plate 6a is slid onto the formwork 11 is repeated, the screed plate 6a is worn only in the sliding portion, and the entire screed plate 6a must be replaced. The inconvenience that it must not occur. Therefore, for example, as shown in FIG. 5, a formwork slider 12, which is a separate part from the screed plate, is attached to the outer side of the screed plate in the screed 6 so that it can be replaced later. When the slide part is worn out by sliding on the mold 11, only the mold slider 12 needs to be replaced.

Japanese Patent No. 3457791

  In the prior art described in Patent Document 1, an asphalt finisher for paving a fluid goose asphalt mixture as an asphalt mixture is disclosed.

  FIG. 5 shows a slide of a formwork slider that is replaceably attached to the outside of the end of the screed plate on the formwork that is installed during paving with such an asphalt finisher. Shows that only the formwork slider needs to be replaced.

  By the way, an asphalt finisher as a goose asphalt finisher is often used for pavement construction at the site of new construction work, and a self-trailer with a small turn is often used for such a carriage for forwarding to the site. However, in the past, the formwork slider was attached to the outside of the end of the screed plate by retrofitting. Therefore, when the self-trailer is used for the carriage for forwarding, the formwork slider is attached to the end of the screed plate to limit the vehicle width. It was necessary to remove from the outside each time. Since the mounting position of the mold slider is the outer portion of the end of the screed plate close to the road surface, the removal of the mold slider has been quite troublesome.

  Therefore, by mounting the formwork slider so that it fits within the machine body width, it is not necessary to remove the formwork slider each time, even when using a self-trailer with a vehicle width restriction on the carriage for forwarding. The technical problem which should be solved in order to improve this and to save labor arises, and this invention aims at solving this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that a hopper is provided at the front of the machine body of the asphalt finisher, and the asphalt mixture put into the hopper is transport means. The spreader is further spread along the width direction of the unpaved surface perpendicular to the machine body traveling direction by the spreader, and the asphalt mixture is spread and leveled by the screed disposed behind the spreader. In a screed apparatus in an asphalt finisher configured as described above, a screed frame outer end surface of the screed is cut out in a key shape toward the inside, and a formwork slider that slides on a formwork installed at the edge of the unpaved surface A screed device in an asphalt finisher fitted in the key-shaped notch Subjected to.

  According to this configuration, the outer end surface of the screed frame is cut out in a key shape toward the inside, and the mold frame slider is fitted into the cutout portion, so that the mold frame slider is fitted within the machine body width. Is possible. When the mold slider is slid on the mold and is worn, only the mold slider is replaced.

According to a second aspect of the invention, the cutout portion of the front Kikagigata, formed over the longitudinal direction all parts of the machine body before Symbol screed frame outer end face, the size formwork which corresponds to the cutout portion 2. A screed device for an asphalt finisher according to claim 1 , wherein a slider is fitted into the notch.

  According to this configuration, since the size of the formwork slider extends over the entire outer surface of the screed frame, the degree of wear of the formwork slider accompanying the operation of the asphalt finisher is reduced, and the frequency of replacement of the formwork slider is reduced. Can be reduced.

According to a third aspect of the invention provides a screed device in the asphalt finisher of claim 1 or 2, wherein the side plates is mounted on the outer end face of the front Symbol formwork slider.

  According to this configuration, by attaching the side plate to the outer end surface of the formwork slider, the asphalt mixture at the edge portion can be more accurately prevented from flowing and deforming during spreading.

  According to the first aspect of the present invention, the mold slider is mounted so as to be within the width of the machine body so that when the asphalt finisher is transported, a self-trailer or the like having a vehicle width restriction is used as the transport cart. There is an advantage that it is not necessary to remove the frame slider each time, the convenience is improved, and the labor can be saved.

  The invention described in claim 2 has the advantage that, in addition to the effect of the invention described in claim 1, the replacement frequency of the formwork slider can be reduced, and further labor saving can be achieved.

  In addition to the effect of the invention described in claim 1 or 2, the invention described in claim 3 further prevents the asphalt composite material at the edge portion from flowing and deforming during the leveling, and further prevents the quality. There is an advantage that high pavement can be performed.

The front view which shows the part which made the form | formula slider fit in the key-shaped notch formed in the lower outer end surface of the lower screed frame in the screed apparatus in the asphalt finisher according to one embodiment of the present invention. It is a figure which shows the prior art as a comparative example of FIG. In another embodiment of the present invention, a key-shaped notch is formed over the entire lower outer end surface of the screed frame, and a portion in which a mold slider of a size corresponding to the notch is fitted to the notch FIG. A side view of a conventional asphalt finisher (goose asphalt finisher). FIG. 6 is a plan view schematically showing a state in which a formwork slider, which is a separate part from the screed plate, is attached to the outside of the screed end in a conventional asphalt finisher so that it can be replaced later.

  The present invention eliminates the need to remove the formwork slider each time, even when a self-trailer with a vehicle width restriction is used for the forward carriage by mounting the formwork slider so as to fit within the machine body width. In order to achieve the purpose of improving convenience and saving labor, a hopper is provided at the front of the machine body of the asphalt finisher, and the asphalt mixture put into the hopper is conveyed to the rear of the machine body by the conveying means. And further spread along the width direction of the unpaved surface perpendicular to the machine body traveling direction by a spreader, and the asphalt mixture is spread and leveled by a screed disposed behind the spreader. In a screed device in an asphalt finisher, the screed frame outer end surface of the screed is Cut away in the key shape toward and said mold the slider to slide the mold on which is installed in the edge of the unpaved surface is achieved by fitting the notch of the key type.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. 1 that are the same as or equivalent to the members in FIG. 4 are denoted by the same reference numerals as those described above, and redundant descriptions are omitted. First, the configuration of the screed device in the asphalt finisher according to the present embodiment will be described.

  In FIG. 1, in this embodiment, the lower outer end surface of the lower screed frame 13a in the screed frame is cut out in a key shape toward the inside, and the mold slider 12A is fitted into the key-shaped cutout portion 14a. As a fixing mode of the mold slider 12A to the lower screed frame 13a, for example, fixing means such as fastening bolts to the lower screed frame 13a and the mold slider 12A at both ends of an appropriately-shaped connecting piece (not shown) is applied. The A side plate 15 for preventing the asphalt mixture from protruding is attached to the outer end face of the mold slider 12A.

  In the present embodiment, since the formwork slider 12A is fitted into the key-shaped cutout portion 14a, the formwork slider 12A is configured to fit within the machine body width L (for example, about 2.5 m). Compared with the comparative example of FIG. 2 in which the formwork slider 12A is retrofitted to the outer end of the lower screed frame 13a, the width of the screed plate 6a (width in the direction perpendicular to the advancing direction of the machine body) is smaller than the formwork slider. 12A is narrowed by the amount stored in the machine body width L. However, the reduced width of the screed plate 6a is not a problem in pavement construction.

  Next, the operation of the screed device in the asphalt finisher configured as described above will be described. The lower outer end face of the lower screed frame 13a in the screed frame is cut out in a key shape toward the inside, and the mold slider 12A is fitted into the key-shaped cutout portion 14a, so that the mold slider 12A is fitted to the machine body width. It becomes possible to mount so as to fit in L. When the mold slider 12A is slid on the mold 11 and is worn, only the mold slider 12A is replaced. Further, by mounting the side plate 15 on the outer end face of the formwork slider 12A, the asphalt mixture at the edge portion can be more accurately prevented from being deformed during spreading.

  As described above, in the screed device in the asphalt finisher according to the present embodiment, the form slider 12A is mounted so as to be within the machine body width L, so that the self-trailer that has a vehicle width limitation when the asphalt finisher is transported or the like. Is used as a carriage for forwarding, it becomes unnecessary to remove the mold slider 12A each time, so that convenience is improved and labor saving can be achieved.

  By mounting the side plate 15 on the outer end face of the formwork slider 12A, it is possible to prevent the asphalt composite material at the edge portion from flowing and deforming more accurately during the leveling and to perform high-quality pavement. be able to.

  FIG. 3 shows another embodiment of the present invention. In this embodiment, a key-shaped notch 14b is formed over the entire lower outer surface of the screed frame 13, and a formwork slider 12B having a size corresponding to the key-shaped notch 14b is formed in the key-shaped notch 14b. It is fitted to the part 14b.

  Since the size of the mold slider 12B extends over the entire lower outer surface of the screed frame 13, the degree of wear of the mold slider 12B due to the operation of the asphalt finisher decreases, and the replacement frequency of the mold slider 12B can be reduced. It can be reduced.

  As described above, in the screed device in the asphalt finisher according to the other embodiments, the replacement frequency of the formwork slider 12B can be reduced, and further convenience and labor saving can be achieved.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  By installing the formwork slider so that it fits within the machine body width, even when using a self-trailer with a vehicle width restriction on the carriage for forwarding, it is not necessary to remove the formwork slider each time, improving convenience In addition, the present invention can be widely applied to asphalt finishers including goose asphalt finishers that are indispensable to save labor.

1 Asphalt finisher (goose asphalt finisher)
2 Machine body 3 Hopper 4 Screw conveyor (conveyance means)
5 spreader 6 screed 6a screed plate 7 leveling arm 8 leveling cylinder 9 scree drift cylinder 10 level roller 11 formwork 12A formwork slider 12B formwork slider 13 screed frame 13a lower screed frame 14a key-shaped notch 14b outside of screed frame Key-shaped notch formed over the entire side surface 15 Side plate

Claims (3)

A hopper is provided at the front of the machine body of the asphalt finisher, and the asphalt mixture put into the hopper is conveyed to the rear of the machine body by the conveying means, and further in the width direction of the unpaved surface perpendicular to the machine body moving direction by the spreader. A screed device in an asphalt finisher configured to spread the asphalt mixture by a screed that is spread along the spreader and disposed behind the spreader,
The screed frame outer end surface of the screed is notched inwardly in a key shape, and a formwork slider that slides on a formwork installed on the helicopter on the unpaved surface is fitted in the notch portion of the key shape. A screed device for an asphalt finisher. The notch of the front Kikagigata, fitted is formed over the longitudinal direction all parts of the machine body before Symbol screed frame outer end face, the size of the mold the slider corresponding to the cutout portion in the notch The screed device for an asphalt finisher according to claim 1. Screed device in the asphalt finisher of claim 1 or 2, wherein the side plates is mounted on the outer end face of the front Symbol formwork slider.

Images