JP2020190155A - Movable taper device - Google Patents

Abstract

To provide a movable taper device capable of smoothly changing an angle of a lower plate without an asphalt mixture entering between upper and lower plates.SOLUTION: A movable taper device includes: an upper plate 10; a lower plate 20 attached to a lower part of the upper plate 10; and connection means 30 for rotatably connecting the lower plate 20 to the upper plate 10. The upper plate 10 and the lower plate 20 extend along the longitudinal direction of an asphalt finisher. The connection means 30 comprises: an upper cylindrical part 31 attached to a lower end surface of the upper plate 10; a lower cylindrical part 32 attached to an upper end surface of the lower plate 20; and a shaft part 33 inserted by passing through the upper cylindrical part 31 and the lower cylindrical part 32. The upper cylindrical part 31 and the lower cylindrical part 32 are continuously arranged over the entire length between the lower end surface of the upper plate 10 and the upper end surface of the lower plate 20.SELECTED DRAWING: Figure 6

Description

The present invention relates to a movable taper device provided in an asphalt finisher.

In road asphalt pavement, asphalt finishers are used to spread and compact the asphalt mixture. Side plates for molding the asphalt mixture are provided at both rear ends of the asphalt finisher. A plate-like device for forming the end portion of the asphalt mixture is attached to the lower end portion of the side plate. The plate-shaped device was mounted by selecting either a flat device parallel to the road surface or a tapered device inclined with respect to the road surface, depending on the shape of the end of the road.

Depending on the road, only the pavement start point and end point of the construction area may be flat in the crossing direction (width direction), and both ends in the crossing direction of the other sections may be tapered. In this case, the pavement construction had to be interrupted and the flat device and the taper device had to be replaced. It takes about 5 to 10 minutes to replace the device, and the construction is interrupted during that time, so there is a concern that the temperature of the asphalt mixture will drop and affect the flatness of the pavement. In addition, there is a similar problem when the pavement is rubbed against a partially adjacent structure within the construction section.

Therefore, in recent years, as shown in Patent Document 1, it has been proposed that a plate is connected to the lower part of a side plate so that the angle can be changed. As shown in FIG. 9B, the lower plate 102 is connected to the side plate 101 via a hinge joint 103. The hinge joint 103 is a shaft that rotatably connects the upper plate 103a that abuts on the lower end side surface of the side plate 101, the plate 103b that abuts on the upper end side surface of the lower plate 102, and the plates 103a and 103b. It is provided with a portion 103c and is provided inside the plate 102 in the rotation direction.

Japanese Unexamined Patent Publication No. 2014-70458

Since the hinge joint 103 of Patent Document 1 is provided inside the plate 102 in the rotation direction, a gap is generated between the end faces of the upper and lower plates 101 and 102. There is a problem that the asphalt mixture A enters the gap and unevenness is generated on the surface of the pavement surface. Further, when the asphalt mixture A adheres to the end faces of the plates 101 and 102, the upper and lower plates 101 and 102 bite the asphalt mixture A and hinder the rotation, so that a step of removing the adhered asphalt mixture A is required. This has led to an increase in construction time.

Therefore, an object of the present invention is to provide a movable taper device capable of smoothly changing the angle of the lower plate without the asphalt mixture entering between the upper and lower plates.

In the present invention for solving the above problems, an upper plate fixed to the side surface of the asphalt finisher, a lower plate attached to the lower part of the upper plate, and the lower plate are rotatably connected to the upper plate. It is a movable taper device provided with a connecting means. The upper plate and the lower plate extend along the anteroposterior direction of the asphalt finisher. The connecting means includes an upper tubular portion attached to the lower end surface of the upper plate, a lower tubular portion attached to the upper end surface of the lower plate, and the upper tubular portion and the lower tubular portion. It is provided with a shaft portion that is hung and inserted. The upper tubular portion and the lower tubular portion are continuously arranged over the entire length between the lower end surface of the upper plate and the upper end surface of the lower plate.

According to the movable taper device having such a configuration, since the connecting means is arranged in the gap between the upper plate and the lower plate, the asphalt mixture does not enter. Therefore, since the asphalt mixture is not clogged between the upper plate and the lower plate, the rotation of the lower plate is not hindered and the angle can be changed smoothly.

In such a movable taper device, a flow path case is provided on the surface of the lower plate along the longitudinal direction of the lower plate, and a heating fluid for heating the lower plate is provided inside the flow path case. It is preferable that the fluid flows. According to such a configuration, the lower plate can be reinforced and the lower plate can be held flat.

Further, it is preferable that an extension plate for extending the lower plate in the width direction is provided at the lower end of the lower plate, and the extension plate is fixed to the flow path case. According to such a configuration, the extension plate can be easily and firmly fixed.

In such a movable taper device, an angle adjusting means for restricting an inclination angle of the lower plate with respect to the upper plate is further provided, and the angle adjusting means includes a link rod extending between the lower plate and the upper plate. Therefore, it is preferable to change the inclination angle of the lower plate by changing the fixed positions of the lower plate, the upper plate, and the link rod. According to such a configuration, the lower plate can be fixed at a predetermined angle.

Further, the link rod includes a pair of end fixing holes formed at both ends of the link rod and an intermediate fixing hole formed between the pair of end fixing holes, and the link. One end fixing hole of the rod is slantably pinned to either the lower plate or the upper plate, and the other end fixing hole of the link rod is fixed according to the inclination angle of the lower plate. Alternatively, it is preferable that the intermediate portion fixing hole is detachably pin-fixed to either the lower plate or the upper plate. According to such a configuration, the work of changing the inclination angle of the lower plate can be easily performed.

According to the movable taper device according to the present invention, the asphalt mixture does not enter between the upper and lower plates, and the angle of the lower plate can be changed smoothly.

It is a perspective view which showed the rear end part of the asphalt finisher which installed the movable taper device which concerns on embodiment of this invention. It is an exploded perspective view which showed the state which installed the movable taper device which concerns on embodiment of this invention on a side plate. It is a figure which showed the movable taper device which concerns on embodiment of this invention, (a) is the side view which showed the state which the lower plate is in a horizontal position, (b) is the state which the lower plate is in an inclined position. It is a side view shown. It is a side view which showed the connecting means of the movable taper device which concerns on embodiment of this invention. It is a figure which showed the angle adjusting means of the movable taper device which concerns on embodiment of this invention, (a) is the rear view which showed the state which the lower plate is in a horizontal position, (b) is the lower plate is an inclined position. It is a rear view which showed the state in. It is a figure which showed the angle adjusting means of the movable taper device which concerns on embodiment of this invention, (a) is the perspective view which showed the state which the lower plate is in a horizontal position, (b) is the figure which the lower plate is an inclined position. It is a perspective view which showed the state in. It is a rear view which showed the state which attached the extension plate to the lower plate. It is a perspective view which showed the state which attached the extension plate to the lower plate. (A) is a schematic view showing a usage state of a movable taper device according to an embodiment of the present invention, and (b) is a schematic view showing a usage state of a conventional taper device.

The movable taper device according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the movable taper device 1 according to the present embodiment is a side plate 3 provided at both ends in the width direction of the telescopic screed 2 (see FIG. 1) at the rear end of the asphalt finisher. It is installed at the lower end. The side plate 3 is suspended from the side beam and is provided so as to be able to be raised and lowered by jacks 4 and 4. The movable taper device 1 forms the ends of the asphalt mixture at both ends in the width direction of the road. The movable taper device 1 includes an upper plate 10, a lower plate 20, connecting means 30, and an angle adjusting means 40.

The upper plate 10 is a portion fixed to the side surface (side surface of the asphalt finisher) of the lower end portion of the side plate 3 and is arranged vertically. As shown in FIG. 3, the upper plate 10 is made of a long metal plate material and extends along the front-rear direction of the asphalt finisher. The upper plate 10 has a length dimension equivalent to the length in the front-rear direction of the side plate 3. A bolt hole 11 through which a bolt for fixing to the side plate 3 is inserted is formed in the upper edge portion of the upper plate 10.

The lower plate 20 is a portion attached to the lower part of the upper plate 10 and is rotatably connected to the upper plate 10 via the connecting means 30. The lower plate 20 is made of a long metal plate material, and extends along the upper plate 10 along the front-rear direction of the asphalt finisher. The lower plate 20 has a length dimension slightly larger than the length in the front-rear direction of the upper plate 10. As shown in FIGS. 3, 5 and 6, the lower plate 20 has a horizontal position P1 (see (a) of FIGS. 3, 5 and 6) perpendicular to the upper plate 10 and a lower side from the horizontal position. It is fixed at the tilted position P2 (see (b) in FIGS. 3, 5 and 6) lowered by 45 °. When the lower plate 20 is in the horizontal position P1, the surface (lower surface) of the lower plate 20 on the asphalt mixture side is located on the same surface as the lower surface of the screed plate 5 on the bottom surface of the telescopic screed 2. When the lower plate 20 is in the inclined position P2, the surface of the lower plate 20 on the asphalt mixture side is inclined at an angle of 45 ° with respect to the upper plate 10. The front end portion 21 (right end portion in FIG. 3) of the lower plate 20 has a tip inclined upward while being in the horizontal position P1 to guide the laid asphalt mixture to a predetermined height. ..

A flow path case 22 is provided on the surface of the lower plate 20. Inside the flow path case 22, a flow path 23 through which a heating fluid flows is formed. By flowing a heating fluid through the flow path 23, the lower plate 20 is heated and the temperature drop during construction of the asphalt mixture is suppressed. The flow path case 22 is formed in a U-shaped cross section by combining an L-shaped angle member 24a and a flat plate plate member 24b. A flow path 23 having a rectangular cross section is formed by the flow path case 22 and the lower plate 20. The length dimension of the flow path case 22 is slightly shorter than the length dimension of the lower plate 20, and spaces for connecting the heating fluid pipes are secured at both ends of the flow path case 22. The flow path case 22 is not limited to a combination of the angle member 24a and the flat plate plate member 24b, and may be configured by using channel steel, for example.

Of the side wall portions of the flow path case 22 orthogonal to the surface of the lower plate 20, the side wall portion of the flow path case 22 located on the widthwise tip side (opposite side of the upper plate 10) of the lower plate 20 will be described later. A connecting member 25 for attaching the extension plate 50 is provided. The connecting member 25 includes a nut 26a welded to the inner surface of the side wall portion and a bolt 26b inserted into the flow path 23 from the outside of the side wall portion. The shaft portion of the bolt 26b is inserted into the flow path 23 through a bolt hole (not shown) formed in the side wall portion. The shaft portion of the bolt 26b is screwed into the inner nut 26a, so that the bolt 26b is fixed to the side wall portion. The configuration and fixing method of the extension plate 50 will be described later.

A grip portion 27 for gripping when the angle of the lower plate 20 is changed is provided on the upper surface portion of the flow path case 22. The grip portion 27 has an inverted U shape, and both ends are welded to the upper surface portion of the flow path case 22. The grip portion 27 is provided at an intermediate portion in the longitudinal direction of the lower plate 20.

The connecting means 30 rotatably connects the lower plate 20 to the upper plate 10. As shown in FIGS. 4 to 6, the connecting means 30 is attached to the upper tubular portion 31 attached to the lower end surface of the upper plate 10 and the upper end surface (end surface on the upper plate 10 side) of the lower plate 20. It includes a lower tubular portion 32, and a shaft portion 33 that is inserted across the upper tubular portion 31 and the lower tubular portion 32. The upper tubular portion 31 is composed of a hinge pipe made of a steel pipe, and is welded to the lower end surface of the upper plate 10. Welded metal is poured into the gap formed between the upper tubular portion 31 and the lower end surface of the upper plate 10 to fill the gap. The lower tubular portion 32 is composed of a hinge pipe made of a steel pipe having the same diameter as the upper tubular portion 31, and is welded to the upper end surface of the lower plate 20. Welded metal is poured into the gap formed between the lower tubular portion 32 and the upper end surface of the lower plate 20 to fill the gap. The weld metal is shown by hatching in the figure. In FIG. 5, among the weld metals for fixing the connecting means 30, the weld metal for fixing the upper tubular portion 31 is located near the front, so it is indicated by hatching of dark dots and the lower tubular portion 32 is fixed. Since the weld metal is located in the far part on the back side, it is indicated by hatching of thin dots. The upper tubular portion 31 and the lower tubular portion 32 are continuously provided along the longitudinal direction between the lower end surface of the upper plate 10 and the upper end surface of the lower plate 20. Specifically, the upper tubular portion 31 and the lower tubular portion 32 are arranged coaxially and are provided alternately adjacent to each other. The upper tubular portion 31 and the lower tubular portion 32 are continuously arranged over the entire length of the upper plate 10 in the longitudinal direction.

The shaft portion 33 has a length dimension equal to or slightly smaller than the length dimension of the upper plate 10. The shaft portion 33 is inserted over the entire length of the plurality of upper tubular portions 31 and the plurality of lower tubular portions 32. At least one of the upper tubular portion 31 and the lower tubular portion 32 is rotatable relative to the shaft portion 33. The shaft portion 33 may be divided in the length direction. In this case, the plurality of divided shaft portions may be combined to have a length dimension equal to or slightly smaller than the length dimension of the upper plate 10.

The angle adjusting means 40 regulates the inclination angle of the lower plate 20 with respect to the upper plate 10 as shown in FIGS. 5 and 6. In the present embodiment, the angle adjusting means 40 is configured to fix the lower plate 20 at two positions, the horizontal position P1 and the inclined position P2. Specifically, the angle adjusting means 40 includes a first bracket 41 provided on the upper plate 10, a second bracket 42 provided on the lower plate 20, and a link rod 43. The angle adjusting means 40 is provided at three locations, both ends in the longitudinal direction of the upper plate 10 and the lower plate 20, and an intermediate portion. The number and location of the angle adjusting means 40 can be appropriately changed according to the length dimension and the weight of the upper plate 10 and the lower plate 20.

The first bracket 41 is fixed to the upper plate 10 via a base plate attached to the upper plate 10. The first bracket 41 is welded to the base plate and projects outward in the width direction of the road. A through hole (not shown) through which a connecting pin 48 for fixing the link rod 43 is inserted is formed at the tip of the first bracket 41. The axial core direction of the through hole is along the anteroposterior direction of the asphalt finisher.

The second bracket 42 is welded to the upper surface portion (upper side of the angle member 24a) of the flow path case 22 of the lower plate 20, and rises at a right angle to the upper surface portion. A through hole (not shown) through which a half-screw bolt 47 for fixing the link rod 43 is inserted is formed at the tip of the second bracket 42. The axial core direction of the through hole is along the anteroposterior direction of the asphalt finisher.

The link rod 43 is a portion that is hung between the upper plate 10 and the lower plate 20. The link rod 43 includes a pair of upper and lower end fixing holes 44, 45 formed at both ends of the link rod 43, and an intermediate portion fixing hole 46 formed between the pair of end fixing holes 44, 45. ing. In the present embodiment, the intermediate portion fixing hole 46 is provided at one place, but a plurality of intermediate portion fixing holes 46 may be provided. If a plurality of intermediate portion fixing holes 46 are provided, the fixing position of the lower plate 20 can be increased.

The lower end of the link rod 43 is rotatably fixed to the second bracket 42 of the lower plate 20. Specifically, the lower end fixing hole 45 of the link rod 43 is arranged coaxially with the through hole of the second bracket 42, and the half-screw bolt 47 is formed in the through hole and the end fixing hole 45. It is installed. As a result, the link rod 43 rotates about the half-screw bolt 47.

The upper end portion and the intermediate portion of the link rod 43 are selected according to the angle of the lower plate 20 and are detachably fixed to the first bracket 41 of the upper plate 10. Specifically, as shown in (a) of FIG. 5 and (a) of FIG. 6, when the lower plate 20 is in the horizontal position P1, the second bracket 42 is located directly below the first bracket 41. The link rod 43 stands up substantially vertically. The link rod 43 is connected to the first bracket 41 via an intermediate fixing hole 46. The intermediate portion fixing hole 46 of the link rod 43 is arranged coaxially with the through hole of the first bracket 41, and the connecting pin 48 is attached to the through hole and the intermediate portion fixing hole 46. The connecting pin 48 is removable.

As shown in (b) of FIG. 5 and (b) of FIG. 6, when the lower plate 20 is in the inclined position P2, the second bracket 42 is located diagonally below the first bracket 41 and the link rod. 43 and the lower plate 20 are inclined. The link rod 43 is connected to the first bracket 41 via the upper end fixing hole 44. As a result, the distance between the first bracket 41 and the second bracket 42 becomes longer, and the second bracket 42 is pushed down diagonally downward. The end fixing hole 44 of the link rod 43 is arranged coaxially with the through hole of the first bracket 41, and the connecting pin 48 is attached to the through hole and the end fixing hole 44.

Next, the configuration when the extension plate 50 is attached to the lower plate 20 will be described with reference to FIGS. 7 and 8. The extension plate 50 is for extending the width dimension to the lower plate 20, and is attached when constructing a road having a long tapered portion.

The extension plate 50 has a thickness equivalent to that of the lower plate 20 and a length in the front-rear direction. The front end portion of the extension plate 50 is inclined upward along the front end portion 21 of the lower plate 20. A fixing bracket 51 for fixing to the lower plate 20 is attached to the surface of the extension plate 50. The fixing metal fitting 51 has a U-shaped cross section, and includes a web portion 52a and flange portions 52b and 52b protruding from both ends of the web portion 52a. In the fixing bracket 51, the tip side portions of both flange portions 52b and 52b are welded to the surface of the extension plate 50. The base end portions of both flange portions 52b and 52b and the web portion 52a project from the extension plate 50 toward the lower plate 20. When the extension plate 50 is installed on the lower plate 20, the web portion 52a of the fixing bracket 51 comes into contact with the side wall portion of the flow path case 22. The web portion 52a is formed with a bolt hole through which a bolt 26b for attaching the extension plate 50 to the lower plate 20 is inserted.

When fixing the fixing bracket 51 to the flow path case 22, the extension plate 50 is adjacent to the lower plate 20 with the bolts 26b on the side wall of the flow path case 22 removed. The shaft portion of the bolt 26b is inserted from the through hole of the fixing bracket 51 into the through hole of the flow path case 22, and is screwed into the inner nut 26a to be tightened. As a result, the fixing bracket 51 is fixed to the flow path case 22, and the extension plate 50 is fixed to the lower plate 20. At this time, the surface of the extension plate 50 on the asphalt mixture side and the surface of the lower plate 20 on the asphalt mixture side are flush with each other.

According to the movable taper device 1 having such a configuration, the following effects are obtained. In such a movable taper device 1, as shown in FIG. 9A, since the connecting means 30 is arranged between the upper plate 10 and the lower plate 20 over the entire length, the asphalt mixture A enters. Absent. Further, even if the angle of the lower plate 20 is changed, the connecting means 30 remains located between the upper plate 10 and the lower plate 20. Therefore, since the asphalt mixture A is not clogged between the upper plate 10 and the lower plate 20, the rotation of the lower plate 20 is not hindered, and the angle can be changed smoothly.

Further, the surface of the asphalt mixture A is formed flat along the lower surface of the screed plate 5 and the lower surface of the lower plate 20. When constructed with a conventional taper device, as shown in FIG. 9B, a gap is generated between the screed plate 104 and the plate 102, and the surface of the asphalt mixture A protrudes. By applying the movable taper device 1 of the present invention, the flatness of the surface of the asphalt mixture A is significantly improved as compared with the conventional case.

Since the flow path case 22 having a U-shaped cross section is attached to the surface of the lower plate 20, the lower plate 20 can be reinforced and the lower plate 20 can be held flat. Thereby, the flatness of the road surface to be constructed can be improved.

Since the extension plate 50 attached to the lower plate 20 is fixed to the side wall portion of the flow path case 22 via bolts 26b, the extension plate 50 can be firmly fixed. Since the bolt 26b is inserted from the outside, construction can be easily performed.

The angle adjusting means 40 includes a link rod 43, and changes the inclination angle of the lower plate 20 by changing the fixed positions of the lower plate 20 and the upper plate 10 and the link rod 43. According to such a configuration, the lower plate 20 can be fixed at a predetermined angle (in this embodiment, at right angles to the upper plate 10 or at 45 °). Further, since the structure of the angle adjusting means 40 is simple, the manufacturing cost can be reduced. Further, the work of changing the inclination angle of the lower plate (angle adjustment work) can be easily performed because it is only necessary to remove the connecting pin 48, change the connecting position of the link rod 43, and attach the connecting pin 48. it can.

Although the embodiment for carrying out the present invention has been described above, the present invention is not intended to be limited to the above-described embodiment, and the design can be appropriately changed without departing from the spirit of the present invention. For example, in the above-described embodiment, the upper tubular portion 31 and the lower tubular portion 32 of the connecting means 30 are arranged alternately, but the present invention is not limited thereto. A plurality of upper tubular portions 31 and a plurality of lower tubular portions 32 may be arranged side by side and connected in succession. Further, the upper tubular portion 31 and the lower tubular portion 32 are not limited to a circular cross section, and if they are rotatable with respect to the shaft portion 33, a C-shaped cross section or the like with a part cut out may be formed. It may have other shapes.

1 Movable taper device 10 Upper plate 20 Lower plate 22 Flow path case 23 Flow path 30 Connecting means 31 Upper tubular part 32 Lower tubular part 33 Shaft 40 Angle adjusting means 41 First bracket 42 Second bracket 43 Link rod 44 End fixing hole 45 End fixing hole 46 Intermediate fixing hole 50 Extension plate 51 Fixing bracket

Claims (5)

An upper plate fixed to the side surface of the asphalt finisher, a lower plate attached to the lower part of the upper plate, and a connecting means for rotatably connecting the lower plate to the upper plate are provided.
The upper plate and the lower plate extend along the anteroposterior direction of the asphalt finisher.
The connecting means includes an upper tubular portion attached to the lower end surface of the upper plate, a lower tubular portion attached to the upper end surface of the lower plate, and the upper tubular portion and the lower tubular portion. It is equipped with a shaft that can be hung and inserted.
The upper tubular portion and the lower tubular portion are movable tapers characterized in that they are continuously arranged over the entire length between the lower end surface of the upper plate and the upper end surface of the lower plate. device. A flow path case is provided on the surface of the lower plate along the longitudinal direction of the lower plate.
The movable taper device according to claim 1, wherein a heating fluid for heating the lower plate flows inside the flow path case. At the lower end of the lower plate, an extension plate for extending the lower plate in the width direction is provided.
The movable taper device according to claim 2, wherein the extension plate is fixed to the flow path case. Further provided with angle adjusting means for regulating the tilt angle of the lower plate with respect to the upper plate.
The angle adjusting means includes a link rod that is hung between the lower plate and the upper plate.
The invention according to any one of claims 1 to 3, wherein the tilt angle of the lower plate is changed by changing the fixed positions of the lower plate, the upper plate, and the link rod. Movable taper device. The link rod includes a pair of end fixing holes formed at both ends of the link rod and an intermediate fixing hole formed between the pair of end fixing holes.
One end fixing hole of the link rod is tiltably fixed to either the lower plate or the upper plate, and the other end fixing of the link rod is fixed according to the inclination angle of the lower plate. The movable taper device according to claim 4, wherein the hole or the intermediate fixing hole is detachably fixed to either the lower plate or the upper plate.

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